Tire vulcanizing machine and tire vulcanizing method

文档序号：1188862 发布日期：2020-09-22 浏览：30次中文

阅读说明：本技术 轮胎加硫机及轮胎加硫方法 (Tire vulcanizing machine and tire vulcanizing method ) 是由市丸宽展岩津壮一郎于 2018-05-16 设计创作，主要内容包括：一种轮胎加硫机及轮胎加硫方法,作为适用了本发明的轮胎加硫机的第一实施方式的轮胎加硫机(A)具备两根导向杆(1)、由上模具(2a)及下模具(2b)构成的模具(2)、上板(5)、下板(10)和上模具升降装置(8)。另外,在导向杆(1)的外周面中,在上板(5)移动的路径上形成了两个夹紧槽(1a)及夹紧槽(1b)。另外,上板(5)具有夹紧装置(4)。夹紧装置(4)由夹紧块(4a)构成,与夹紧槽(1a)或夹紧槽(1b)嵌合,将上板(5)固定。(A tire vulcanizer (A) as a first embodiment of a tire vulcanizer to which the present invention is applied is provided with two guide bars (1), a mold (2) composed of an upper mold (2a) and a lower mold (2b), an upper plate (5), a lower plate (10), and an upper mold lifting device (8). In addition, two clamping grooves (1a, 1b) are formed in the outer peripheral surface of the guide bar (1) on the path along which the upper plate (5) moves. In addition, the upper plate (5) has a clamping device (4). The clamping device (4) is composed of a clamping block (4a) and is embedded in the clamping groove (1a) or the clamping groove (1b) to fix the upper plate (5).)

1. A tire vulcanizer comprising a first plate, a second plate, a substantially cylindrical guide bar, a mold moving mechanism, a mold pressing mechanism and a clamping mechanism,

the first plate is provided with a first metal mold which is provided with a gall bladder for heating and pressurizing a green tire,

a second plate to which a second metal mold configured to be capable of holding the gallbladder in cooperation with the first metal mold is attached,

a substantially cylindrical guide bar attached to the first plate and the second plate for guiding relative movement of the first plate and the second plate,

the mold moving mechanism relatively moves the first plate and the second plate along the guide bar,

the mold pressing mechanism applies pressure to the first mold and the second mold which are clamped when the green tire is heated and pressed by the bladder to keep the clamped state,

the clamping mechanism fixes the relative position of the first plate and the second plate at a clamping position corresponding to the size of the first mold and the second mold to be clamped when the green tire is heated and pressurized by the bladder, and has a plurality of clamping positions while maintaining the clamped state.

2. The tire vulcanizer of claim 1,

the clamping mechanism is composed of a clamping groove and a clamping part,

the clamping groove is formed at a plurality of different positions in the longitudinal direction of the guide bar to be the clamping position,

the clamping portion is provided on at least one of the first plate and the second plate, and is fitted into the clamping groove to fix the relative positions of the first plate and the second plate.

3. The tire vulcanizer of claim 1,

the clamping mechanism is composed of a clamping rod and a clamping part,

a clamp rod which is positioned on a surface of the first plate facing the second plate, is a substantially cylindrical body formed so as to protrude in a direction toward the second plate, and has clamp grooves formed at a plurality of different positions in a longitudinal direction on a tip end side thereof to be the clamp positions; a clamping portion provided on the second plate, fitted in the clamping groove, and fixing a relative position of the first plate and the second plate;

or a clamping rod and a clamping part,

a clamp rod which is positioned on a surface of the second plate facing the first plate, is a substantially cylindrical body formed so as to protrude in a direction toward the first plate, and has clamp grooves formed at a plurality of different positions in a longitudinal direction on a tip end side thereof to be the clamp positions; the clamping portion is provided on the first plate, and is fitted into the clamping groove to fix the relative positions of the first plate and the second plate.

4. The tire vulcanizer of claim 1,

the clamping mechanism is composed of a first clamping groove, a first clamping part, a clamping rod and a second clamping part,

a clamp rod which is positioned on a surface of the first plate facing the second plate, is substantially cylindrical, and is formed so as to protrude in a direction toward the second plate, and has second clamp grooves formed on a distal end side thereof at a plurality of different positions in a longitudinal direction to serve as the clamp positions, the second clamp portion being provided on the second plate, being fitted into the second clamp grooves, and fixing a relative position between the first plate and the second plate;

or a clamping lever and a second clamping part,

the clamp rod is positioned on a surface of the second plate facing the first plate, is formed into a substantially cylindrical shape projecting in a direction toward the first plate, and has second clamp grooves formed on a distal end side thereof at a plurality of different positions in a longitudinal direction to serve as the clamp positions.

5. The tire vulcanizer of claim 1, 2, 3 or 4,

the mold height adjusting mechanism is provided on the first plate, and is capable of changing a distance between the first mold and the first plate.

6. The tire vulcanizer of claim 2,

the guide bar adjusting mechanism is provided to change the position of the guide bar relative to the first plate along the length direction of the guide bar.

7. A tire vulcanizer comprising a first plate, a second plate, a substantially cylindrical guide bar, a mold moving mechanism, a mold pressing mechanism and a clamping mechanism,

the first plate is provided with a first metal mold which is provided with a gall bladder for heating and pressurizing a green tire,

a second plate to which a second metal mold configured to be capable of holding the gallbladder in cooperation with the first metal mold is attached,

a substantially cylindrical guide bar attached to the first plate and the second plate for guiding relative movement of the first plate and the second plate,

the mold moving mechanism relatively moves the first plate and the second plate along the guide bar,

the mold pressing mechanism applies pressure to the first mold and the second mold which are clamped when the green tire is heated and pressed by the bladder to keep the clamped state,

the clamping mechanism is composed of a clamping groove and a clamping part,

the clamping groove is formed on the guide rod to form the clamping position,

a clamping portion provided on at least one of the first plate and the second plate and fitted in the clamping groove to fix a relative position of the first plate and the second plate,

the clamping portion has a clamping portion adjusting mechanism that can change a distance from the plate of the first plate or the second plate on which the clamping portion is provided.

8. A tire vulcanizer comprising a first plate, a second plate, a substantially cylindrical guide bar, a mold moving mechanism, a mold pressing mechanism and a clamping mechanism,

the first plate is provided with a first metal mold which is provided with a gall bladder for heating and pressurizing a green tire,

a second plate to which a second metal mold configured to be capable of holding the gallbladder in cooperation with the first metal mold is attached,

a substantially cylindrical guide bar attached to the first plate and the second plate for guiding relative movement of the first plate and the second plate,

the mold moving mechanism relatively moves the first plate and the second plate along the guide bar,

the mold pressing mechanism applies pressure to the first mold and the second mold which are clamped when the green tire is heated and pressed by the bladder to keep the clamped state,

the clamping mechanism is composed of a clamping rod and a clamping part,

a clamp rod which is positioned on a surface of the first plate facing the second plate, is a substantially cylindrical body formed so as to protrude in a direction toward the second plate, and has a clamp groove formed on a tip end side thereof to be the clamping position; a clamping portion provided on the second plate, fitted in the clamping groove, and fixing a relative position of the first plate and the second plate;

or a clamping rod and a clamping part,

a clamp rod which is positioned on a surface of the second plate facing the first plate, is a substantially cylindrical body formed to protrude in a direction toward the first plate, and has a clamp groove formed on a tip end side thereof to be the clamping position; a clamping portion provided on the first plate and fitted into the clamping groove to fix a relative position of the first plate and the second plate,

the clamping portion has a clamping portion adjusting mechanism that can change a distance from the plate of the first plate or the second plate on which the clamping portion is provided.

9. The tire vulcanizer of claim 7 or 8,

the second plate is disposed above the first plate in a vertical direction,

the clamping portion is provided on the second plate.

10. The tire vulcanizer of claim 7, 8 or 9,

a plurality of the aforementioned clamping grooves are formed.

11. The tire vulcanizer of claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10,

the clamping device is provided with a position detection component which can detect the clamping position corresponding to the sizes of the first metal mold and the second metal mold which are clamped.

12. A tire vulcanizer comprising a first plate, a second plate, a substantially cylindrical guide bar, a mold moving mechanism, a mold pressing mechanism, a clamping portion, and a guide bar adjusting mechanism,

the first plate is provided with a first metal mold which is provided with a gall bladder for heating and pressurizing a green tire,

a second plate to which a second metal mold configured to be capable of holding the gallbladder in cooperation with the first metal mold is attached,

a substantially cylindrical guide bar attached to the first plate and the second plate, guiding the relative movement of the first plate and the second plate, and forming a clamping groove,

the mold moving mechanism relatively moves the first plate and the second plate along the guide bar,

the mold pressing mechanism applies pressure to the first mold and the second mold which are clamped when the green tire is heated and pressed by the bladder to keep the clamped state,

a clamp portion provided on at least one of the first plate and the second plate, the clamp portion being fitted into the clamp groove when the green tire is heated and pressurized by the bladder, and holding a clamped state in which a position of the first plate and the second plate relative to each other is fixed at a clamp position corresponding to a size of the first mold and the second mold to be clamped,

the guide bar adjusting mechanism is capable of changing the position of the guide bar relative to the first plate along the length direction of the guide bar.

13. A tire vulcanizing method includes a mold clamping step of clamping a first mold provided with a bladder for heating and pressurizing a green tire and a second mold configured to be capable of holding the bladder in cooperation with the first mold, the second mold being moved relative to the first mold along a guide bar attached to the first plate and the second plate; a clamping step of fixing a relative position of the first plate and the second plate at a clamping position corresponding to a size of the clamped first mold and the clamped second mold, and maintaining the clamped state,

the clamping step is provided with a plurality of clamping positions, and is configured to be able to select a position to be used from the clamping positions in accordance with the size of the first mold and the second mold when the molds are clamped.

14. The tire vulcanizing method according to claim 13, wherein,

the clamping step includes a step of changing a distance between the first mold and the first plate to adjust sizes of the first mold and the second mold that are clamped.

15. The tire vulcanizing method according to claim 13, wherein,

the guide bar has a plurality of clamping grooves formed at different positions in the longitudinal direction thereof to serve as the clamping positions,

a clamping portion is formed on at least one of the first plate and the second plate, the clamping portion is engaged with the clamping groove to fix the relative position of the first plate and the second plate,

the clamping step includes a step of changing a position of the guide bar relative to the first plate along a length direction of the guide bar.

16. A tire vulcanizing method includes a mold clamping step of clamping a first mold provided with a bladder for heating and pressurizing a green tire and a second mold configured to be capable of holding the bladder in cooperation with the first mold, the second mold being moved relative to the first mold along a guide bar attached to the first plate and the second plate; a clamping step of fixing a relative position of the first plate and the second plate at a clamping position corresponding to a size of the clamped first mold and the clamped second mold, and maintaining the clamped state,

a clamping groove which becomes the clamping position is formed on the guide rod,

the clamping step includes a step of changing a distance between a plate provided with the clamping portion, out of the first plate or the second plate, and the clamping portion.

17. A tire vulcanizing method includes a mold clamping step of clamping a first mold provided with a bladder for heating and pressurizing a green tire and a second mold configured to be capable of holding the bladder in cooperation with the first mold, the second mold being moved relative to the first mold along a guide bar attached to the first plate and the second plate; a clamping step of fixing a relative position of the first plate and the second plate at a clamping position corresponding to a size of the clamped first mold and the clamped second mold, and maintaining the clamped state,

the clamping step includes the following steps:

fitting a clamp groove formed at a tip end of a substantially cylindrical clamp rod provided on the first plate into a clamp portion provided on the second plate, and fixing a relative position between the first plate and the second plate; or

Fitting a clamp groove formed at a tip end of a substantially cylindrical clamp rod provided on the second plate into a clamp portion provided on the first plate, and fixing a relative position between the first plate and the second plate; and

and changing a distance between the plate provided with the clamping portion of the first plate or the second plate and the clamping portion.

Technical Field

The present invention relates to a tire vulcanizing machine and a tire vulcanizing method. More specifically, the present invention relates to a tire vulcanizer and a tire vulcanizing method which are simple and easy, can be made compact according to various mold heights, and are excellent in operability.

Background

In the manufacture of tires, a green tire, which is previously formed into a shape close to a finished product, is put into a mold and pressurized and heated. At this time, the bladder provided in the mold is expanded to be closely adhered to the inner surface of the green tire, and vulcanization is performed.

In general, in a tire vulcanizer, molds having various sizes (outer diameter and height) are mounted in accordance with the size of a tire to be vulcanized. That is, there are a plurality of types of molds and heights thereof (mold heights) that match the size of the tire, and an operation of replacing the mold with respect to one tire vulcanizer occurs.

Further, the tire vulcanizer is provided with a clamping mechanism and a mold pressing mechanism for maintaining a mold clamping state of the mold against a pressure generated in the mold when vulcanizing the green tire.

Among them, the clamping mechanism has a clamping position for fixing the position of the upper and lower plates to which the pair of molds are attached, in accordance with the height of the mold to which the mold is clamped. That is, the upper plate or the lower plate is moved, and the upper plate and the lower plate are fixed with a position at which the mold in a clamped state can be fixed as a clamping position.

By fixing the upper and lower plates in this manner, it is possible to prevent the mold from opening by the pressure generated inside the mold when vulcanizing the tire, and to maintain the mold in a closed state.

The clamping position in this clamping mechanism is defined by, for example, the formation position of a clamping groove formed in a guide bar that guides the movement of the upper plate or the lower plate.

Further, a clamp portion that fits into the clamp groove is provided on the moving one of the upper plate and the lower plate, and the upper plate and the lower plate are fixed by the clamp portion fitting into the clamp groove for locking.

In addition, as the clamp mechanism, there is also a structure in which, unlike the guide bar, a bar-shaped clamp bar having a clamp groove formed at the tip end is provided on one of the upper and lower plates, a clamp portion is provided on the other plate, and the upper and lower plates are fixed by fitting and locking the tip end of the clamp bar reaching the clamp portion.

In the clamping mechanism of the conventional tire vulcanizer, one clamping groove is formed at one position on the guide rod or the clamping rod. That is, the clamp position is limited to one position, and when the mold is changed to a different size in accordance with the size of the tire, it is necessary to perform an operation of changing the height position of the mold.

More specifically, it is necessary to match the height position of the mold in the clamped state with a position where the mold can be clamped by the clamping mechanism. That is, the mold must be moved to a height position where it can be clamped by the clamping mechanism. The height position of the mold in the clamped state differs depending on the size of the mold used.

As the range of the height position of the mold in the clamped state as described above, a range that allows a height position of the mold of several hundred mm is generally required in one tire vulcanizer. For example, a typical tire vulcanizer for a passenger vehicle tire has a structure suitable for a range of height positions of a mold of about 200 to 600 mm.

In such a case, in a tire vulcanizer in which a mold is held by a clamp mechanism in a clamped state, for example, a tire vulcanizer described in patent document 1, there is a mold height adjusting mechanism (see fig. 1(b), 2(a), and 2(b)) as a structure for changing the height position of the mold.

The mold height adjusting mechanism 3 in the tire vulcanizer 100 described in patent document 1 includes a nut 3a rotatably attached to the lower plate 10 and a screw 3b engaged with the nut 3 a. Further, a lower die 2b is attached to the screw 3b via a pressing mechanism 9 (or 9'), a heat shield 7 and a lower heat plate 6 b.

In the mold height adjusting mechanism 3, the screw 3b is moved up and down in the vertical direction with respect to the lower plate 10 by rotating the nut 3a with respect to the screw 3b, and the lower mold 2b is also moved up and down in accordance with this movement, whereby the height position of the mold can be changed.

For example, by lowering the screw 3b, the screw 3b is lowered to the lowest position with respect to the lower plate 10, that is, a state in which the height position of the mold is minimum (a closed state in which the mold thickness is maximum) (see fig. 2 (a)).

Further, by raising the screw 3b, the screw 3b is raised to the highest position with respect to the lower plate 10, that is, a state in which the height position of the mold is the maximum (a closed state in which the mold thickness is the minimum) (see fig. 2 (b)).

The height position of the mold can be set so that the screw 3b stops at a desired position within the movable range of the upper and lower limits. Even when the mold height adjusting mechanism 3 changes the mold to a different size, the height position of the mold can be set in accordance with the clamping position.

Prior art documents

Patent document

Patent document 1: japanese patent No. 3762092 Specification

Patent document 2: japanese patent No. 3254100 Specification

Disclosure of Invention

Problems to be solved by the invention

However, in the tire vulcanizer described in patent document 1, as shown in fig. 2(b), when the height position of the mold is set to be the maximum, the distance from the upper end of the lower plate 10 to the lower end of the pressing mechanism 9 (the portion indicated by reference symbol H in fig. 2(b)) is about 400 mm.

In recent years, from the viewpoint of cost reduction and improvement in maintainability in installing a tire vulcanizer, there has been an increase in a system in which a trench (vertical hole) is not provided on a floor surface of a work site and a tire vulcanizer is provided on the floor surface.

In this case, it is generally necessary for the structure of the tire vulcanizer that the height from the floor surface to the lower plate is 1500mm or more. In addition to this height, when the above-mentioned 400mm is added to the height position of the mold, the height from the floor surface to the mold becomes 1900mm or more.

As described above, the height from the floor surface to the mold increases, and this hinders the work of visually inspecting the mold and checking the vulcanization state of the tire. In addition, there is a problem that the replacement work and maintenance work of the mold are difficult.

Further, since it is inevitable that the tire vulcanizer becomes long in the vertical direction, a large space is required for installing the tire vulcanizer.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a tire vulcanizer and a tire vulcanizing method which are simple and easy, can cope with various mold heights, and are excellent in operability while achieving a reduction in size of the apparatus.

Means for solving the problems

Here, the green tire disposed between the respective molds and the bladder may be heated and pressurized to vulcanize the green tire by holding the bladder between a first mold provided with the bladder for heating and pressurizing the green tire and a second mold configured to be capable of holding the bladder in cooperation with the first mold.

Further, the first mold and the second mold can be clamped by moving the first plate or the second plate along the guide bar by a first plate on which the first mold is mounted, a second plate on which the second mold is mounted, a guide bar which is mounted on the first plate and the second plate and guides the relative movement of the first plate and the second plate, and a mold moving mechanism which relatively moves the first plate and the second plate along the guide bar. After the vulcanization of the tire is completed, the first mold and the second mold can be separated from each other and released from the state in which the molds are closed. In addition, the relative movement of the first plate and the second plate mentioned here is meant to include both a mode in which the first plate is fixed and the second plate is moved and a mode in which the second plate is fixed and the first plate is moved.

Further, the mold pressing mechanism presses the first mold and the second mold that are clamped together when the green tire is heated and pressed by the bladder to maintain the clamped state, thereby suppressing the first mold and the second mold that are clamped together from opening due to the pressure generated when the tire is heated and pressed.

Further, the relative movement of the first plate and the second plate is guided by a substantially cylindrical guide bar attached to the first plate and the second plate, a mold moving mechanism for relatively moving the first plate and the second plate along the guide bar, and a clamping mechanism for fixing the relative position of the first plate and the second plate at a clamping position corresponding to the size of the first mold and the second mold to be clamped and maintaining the clamped state when the green tire is heated and pressurized by the bladder, the first plate or the second plate is moved along the guide bar, the position of each plate is fixed by the clamping mechanism, and the clamped state of the molds is maintained. That is, in addition to the mold pressing mechanism, the clamping mechanism can also suppress the phenomenon that the first mold and the second mold that are clamped open due to the pressure generated when the tire is heated and pressed. In addition, the relative movement of the first plate and the second plate mentioned here means both a mode in which the first plate is fixed and the second plate is moved and a mode in which the second plate is fixed and the first plate is moved.

Further, the clamp mechanism has a plurality of clamp positions in which the relative position of the first plate and the second plate is fixed at the clamp position corresponding to the size of the first mold and the second mold that are clamped, and the clamp mechanism maintains the clamped state, and can be adapted to the clamp position without largely changing the height position of the mold when changing to a mold having a different size. That is, in one tire vulcanizer, when the size of a mold at the time of mold clamping is changed by replacing the mold with a mold having a different size, it is necessary to perform an operation of matching the clamping position with the height position of the mold. In this operation, by selecting a position matching the size of the mold from the plurality of clamping positions, it is not necessary to perform the positioning only by changing the height position of the mold. As a result, for example, when the lower die is raised to change the height position of the die composed of the upper and lower dies, the raising distance of the lower die is shortened, and the height position of the die from the floor surface or the like on which the tire vulcanizer is installed can be lowered. Further, the size of the entire tire vulcanizer can be reduced.

The clamping mechanism includes a clamping groove formed at a plurality of different positions in the longitudinal direction of the guide bar to serve as the clamping position, and a clamping portion provided on at least one of the first plate and the second plate and fitted into the clamping groove to fix the relative positions of the first plate and the second plate. In this case, the first plate or the second plate is moved along the guide bar, and the clamping portion is fitted into the clamping groove of the guide bar, thereby maintaining the state in which the mold is clamped when vulcanizing the tire. In addition, a plurality of clamping grooves can be provided on the guide bar, from which clamping positions can be selected that correspond to the size of the mold.

The clamp mechanism is configured by a clamp rod which is positioned on a surface of the first plate facing the second plate, is a substantially cylindrical body formed so as to project in a direction toward the second plate, and has clamp grooves formed at a plurality of different positions in a longitudinal direction on a tip end side thereof to be the clamp positions; the clamping portion is provided on the second plate, and is fitted into the clamping groove to fix the relative positions of the first plate and the second plate. In this case, the clamp portion provided on the second plate can be fitted into the clamp groove provided at the tip of the clamp rod provided on the first plate, and the state in which the mold is clamped when vulcanizing the tire can be maintained. Further, a plurality of clamp grooves may be provided on the tip end side of the clamp rod, and a clamp position corresponding to the size of the mold may be selected from the plurality of clamp grooves.

The clamp mechanism is configured by a clamp rod which is positioned on a surface of the second plate facing the first plate, is a substantially cylindrical body formed so as to protrude in a direction toward the first plate, and has clamp grooves formed at a plurality of different positions in a longitudinal direction on a tip end side thereof to be the clamp positions; the clamping portion is provided on the first plate, and is fitted into the clamping groove to fix the relative positions of the first plate and the second plate. In this case, the clamp portion provided on the first plate can be fitted into the clamp groove provided at the tip of the clamp rod provided on the second plate, and the state in which the mold is clamped when vulcanizing the tire can be maintained. Further, a plurality of clamp grooves may be provided on the tip end side of the clamp rod, and a clamp position corresponding to the size of the mold may be selected from the plurality of clamp grooves.

The clamping mechanism is composed of a first clamping groove, a first clamping part, a clamping rod and a second clamping part, the first clamping groove is formed at a plurality of different positions in the longitudinal direction of the guide bar to be the clamping position, a first clamping portion provided on at least one of the first plate and the second plate and fitted in the first clamping groove to fix a relative position of the first plate and the second plate, the clamp rod is positioned on the surface of the first plate opposite to the second plate, and is a substantially cylindrical body formed to protrude toward the second plate, and second clamping grooves which become the clamping positions are formed on the front end side of the clamping device at different positions in the length direction, the second clamping portion is provided on the second plate, and is fitted into the second clamping groove to fix the relative positions of the first plate and the second plate. In this case, the state in which the mold is clamped when vulcanizing the tire can be held by each of the first clamp using the guide bar and the second clamp using the clamp bar provided on the first plate.

Here, the clamping positions of the first clamping portion and the second clamping portion can be made to correspond to each other, and the state in which the mold is clamped can be maintained by the two clamping portions with respect to one type of mold. In this case, the force for holding the mold can be made even stronger. Further, the clamping positions of the first clamping portion and the second clamping portion may be different, and the state in which the molds are clamped with respect to the molds having different sizes may be maintained by the respective clamping portions. In this case, since the clamping position of each clamping portion is changed, the range of the size of the corresponding mold in one tire vulcanizer can be widened.

The clamping mechanism is composed of a first clamping groove, a first clamping part, a clamping rod and a second clamping part,

the first clamping groove is formed at a plurality of different positions in the longitudinal direction of the guide bar to serve as the clamping position, the first clamping portion is provided at least one of the first plate and the second plate, and is fitted into the first clamping groove to fix the relative position of the first plate and the second plate, the clamping bar is substantially cylindrical and is formed to protrude in the direction of the first plate on the surface of the second plate facing the first plate, and second clamping grooves serving as the clamping position are formed at a plurality of different positions in the longitudinal direction on the tip side thereof, and the second clamping portion is provided at the first plate, is fitted into the second clamping groove, and fixes the relative position of the first plate and the second plate. In this case, the state in which the mold is clamped when vulcanizing the tire can be held by each of the first clamp using the guide bar and the second clamp using the clamp bar provided on the second plate.

Further, the die height adjusting mechanism is provided on the first plate, and the distance between the first die and the first plate can be changed. In this case, when the mold is replaced with a mold having a different size, the distance between the first mold and the first plate can be changed so that the clamping position and the height position of the mold coincide with each other. Further, as described above, since the clamping position can be selected from a plurality of positions, the length of the distance to be changed can be made shorter when the distance between the first die and the first plate is changed.

Further, the guide bar adjusting mechanism is provided, and the position of the guide bar relative to the first plate can be changed along the length direction of the guide bar. In this case, the position of the clamping groove can be changed by changing the position of the guide rod. That is, the position of the guide bar relative to the first plate can be changed in accordance with the size of the mold, and the clamping position can be adjusted. As a result, the clamping position and the height position of the mold can be matched only by adjusting the position of the guide bar. That is, for example, the clamping position can be controlled only by adjusting the position of the guide bar without providing a die height adjusting mechanism for adjusting the distance between the first die and the first plate. Further, since the guide bar is provided with the plurality of clamp grooves, the distance over which the position of the guide bar is adjusted can be shortened.

Here, since the clamp portion has the clamp portion adjusting mechanism that can change the distance between the clamp portion and the plate provided with the clamp portion, out of the first plate and the second plate, the position of the clamp portion fitted into the clamp groove can be changed by changing the distance between the clamp portion and the plate provided with the clamp portion. That is, the position of the clamping portion can be changed in accordance with the size of the mold to adjust the clamping position. As a result, the clamping position and the height position of the mold can be matched only by adjusting the position of the clamping portion. That is, for example, the clamping position can be controlled only by adjusting the position of the clamping portion without providing a mold height adjusting mechanism for adjusting the distance between the first mold and the first plate.

In order to achieve the above object, a tire vulcanizer according to the present invention includes a first plate on which a first mold having a bladder for heating and pressurizing a green tire is mounted, a second plate on which a second mold configured to be capable of sandwiching the bladder in cooperation with the first mold is mounted, a substantially cylindrical guide bar mounted on the first plate and the second plate for guiding relative movement of the first plate and the second plate, a mold moving mechanism for relatively moving the first plate and the second plate along the guide bar, and a clamping mechanism for applying a pressure to the first mold and the second mold which are clamped when the green tire is heated and pressurized by the bladder, a clamping mechanism for holding a clamped state in which relative positions of the first plate and the second plate are fixed at a clamping position corresponding to sizes of the first mold and the second mold to be clamped when the green tire is heated and pressurized by the bladder, the clamping mechanism being configured by a clamping lever and a clamping portion, the clamping lever being positioned on a surface of the first plate facing the second plate, the clamping lever being a substantially cylindrical body formed so as to protrude in a direction toward the second plate, and a clamping groove serving as the clamping position being formed on a distal end side of the clamping lever; a clamping portion provided on the second plate, fitted in the clamping groove, and fixing a relative position of the first plate and the second plate; or a clamp rod which is positioned on a surface of the second plate facing the first plate, is substantially cylindrical and is formed so as to protrude in a direction toward the first plate, and has a clamp groove serving as the clamping position formed on a tip end side thereof; the clamping portion is provided on the first plate, and is fitted into the clamping groove to fix the relative positions of the first plate and the second plate, and the clamping portion has a clamping portion adjusting mechanism that can change the distance from the plate of the first plate or the second plate on which the clamping portion is provided.

The second plate is disposed above the first plate in a vertical direction, and the clamp is provided on the second plate. In this case, the clamp adjustment mechanism may be disposed at a position separated from the gallbladder and the mold clamped by the first plate. As a result, the influence of high temperature generated from the gallbladder and the mold, leakage of the vulcanizing agent, and the like is less likely to be exerted on the clamping adjustment mechanism, and the durability of the clamping adjustment mechanism can be improved. Further, when the clamp adjustment mechanism is repaired or inspected in the event of failure, the gallbladder and the mold do not need to be removed, and the maintenance work can be facilitated.

In addition, a plurality of the aforementioned clamping grooves are formed. In this case, an appropriate clamp groove can be selected from the plurality of clamp grooves in accordance with the height of the mold in accordance with the change in the position of the clamp portion by the clamp adjustment mechanism, and the distance for changing the position of the clamp portion can be shortened.

Further, the clamping device is provided with a position detection means for detecting the clamping position corresponding to the size of the first mold and the second mold that are clamped. In this case, selection of an appropriate clamping position from among the plurality of clamping positions can be performed based on information of the position detected by the position detecting member. Further, when a mold height adjusting mechanism is provided for adjusting the distance between the first mold and the first plate, the distance between the first mold and the first plate can be adjusted based on the information of the position detected by the position detecting means. That is, for example, by automating the operation of the position detecting means, the selection of an appropriate clamping position from among the plurality of clamping positions, the operation of moving the first plate or the second plate, and the operation of the mold height adjusting mechanism, respectively, it is possible to automatically perform the operation of matching the clamping position with the height position of the mold after the mold is replaced with a different mold.

Further, in order to achieve the above object, a tire vulcanizer according to the present invention includes a first plate on which a first mold having a bladder for heating and pressurizing a green tire is mounted, a second plate on which a second mold configured to be capable of sandwiching the bladder in cooperation with the first mold is mounted, a substantially cylindrical guide bar mounted on the first plate and the second plate, guiding relative movement of the first plate and the second plate and forming a clamping groove, a second plate on which the bladder is held, a substantially cylindrical guide bar mounted on the first plate and the second plate, and a guide bar adjusting mechanism for applying pressure to the first mold and the second mold clamped together when the green tire is heated and pressurized by the bladder, and a clamping portion provided on at least one of the first plate and the second plate, the clamping portion being fitted into the clamping groove when the green tire is heated and pressurized by the bladder, and fixing a relative position of the first plate and the second plate at a clamping position corresponding to a size of the first mold and the second mold to be clamped, the clamping portion being capable of changing a position of the guide bar relative to the first plate in a length direction of the guide bar.

Here, the position of the clamping groove can be changed by changing the position of the guide rod, which forms the clamping groove, by the guide rod, which forms the clamping groove, the clamping portion, and the steerable-rod adjusting mechanism; a clamping portion that is fitted into the clamping groove when the green tire is heated and pressurized by the bladder, and that fixes the relative positions of the first plate and the second plate at clamping positions corresponding to the sizes of the first mold and the second mold that are clamped, and that maintains the clamped state; the guide bar adjusting mechanism can change the position of the guide bar relative to the first plate along the length direction of the guide bar. That is, the position of the guide bar relative to the first plate can be changed in accordance with the size of the mold, and the clamping position can be adjusted. As a result, the clamping position and the height position of the mold can be matched only by adjusting the position of the guide bar. Further, since the position of the guide bar can be changed, the clamping position can be matched with the height position of the mold by providing only one clamping groove in the guide bar.

Here, the clamping step is provided with a plurality of clamping positions and is configured to be able to select a position to be used from the clamping positions in accordance with the size when the first mold and the second mold are clamped, so that the clamping position can be matched without largely changing the height position of the mold when changing to a mold having a different size. That is, in one tire vulcanizer, when the size of a mold at the time of mold clamping is changed by replacing the mold with a mold having a different size, it is necessary to perform an operation of matching the clamping position with the height position of the mold. In this operation, by selecting a position matching the size of the mold from the plurality of clamping positions, it is not necessary to perform the positioning only by changing the height position of the mold. As a result, for example, when the lower die is raised to change the height position of the die composed of the upper and lower dies, the raising distance of the lower die is shortened, and the height position of the die from the floor surface or the like on which the tire vulcanizer is installed can be lowered. Further, the size of the entire tire vulcanizer can be reduced.

The clamping step includes a step of changing a distance between the first mold and the first plate to adjust sizes of the first mold and the second mold that are clamped. In this case, when the mold is replaced with a mold having a different size, the distance between the first mold and the first plate can be changed so that the clamping position and the height position of the mold coincide with each other. Further, as described above, since the clamping position can be selected from a plurality of clamping positions, when the distance between the first die and the first plate is changed, the length of the changed distance can be shortened.

The guide bar has a plurality of different positions in the longitudinal direction thereof formed with clamping grooves that serve as the clamping positions, and at least one of the first plate and the second plate has a clamping portion that fits into the clamping grooves to fix the relative positions of the first plate and the second plate, and the clamping step includes a step of changing the position of the guide bar relative to the first plate in the longitudinal direction of the guide bar. In this case, the position of the clamping groove can be changed by changing the position of the guide rod. That is, the position of the guide bar relative to the first plate can be changed in accordance with the size of the mold, and the clamping position can be adjusted. As a result, the clamping position and the height position of the mold can be matched only by adjusting the position of the guide bar. That is, for example, the clamping position can be controlled only by adjusting the position of the guide bar without providing a die height adjusting mechanism for adjusting the distance between the first die and the first plate. Further, since the guide bar is provided with the plurality of clamp grooves, the distance over which the position of the guide bar is adjusted can be shortened.

In order to achieve the above object, a tire vulcanizing method according to the present invention includes a mold clamping step of clamping a first mold having a bladder for heating and pressurizing a green tire and a second mold having a bladder for holding the bladder in cooperation with the first mold, the first mold and the second mold being moved relative to each other along a guide bar attached to the first plate and the second plate; the clamping step includes a step of fixing a relative position of the first plate and the second plate at a clamping position corresponding to a size of the first mold and the second mold, and maintaining a clamped state, wherein a clamping groove serving as the clamping position is formed in the guide bar, a clamping portion is formed in at least one of the first plate and the second plate, the clamping portion is fitted into the clamping groove, and the relative position of the first plate and the second plate is fixed, and the clamping step includes a step of changing a distance between a plate of the first plate or the second plate, on which the clamping portion is provided, and the clamping portion.

Here, the clamping step includes a step of changing a distance between the plate provided with the clamping portion of the first plate or the second plate and the clamping portion, and thereby, when a mold having a different size is replaced, the distance between the clamping portion and the plate provided with the clamping portion can be changed so that the clamping position and the height position of the mold coincide with each other.

In order to achieve the above object, a tire vulcanizing method according to the present invention includes a mold clamping step of clamping a first mold having a bladder for heating and pressurizing a green tire and a second mold having a bladder for holding the bladder in cooperation with the first mold, the first mold and the second mold being moved relative to each other along a guide bar attached to the first plate and the second plate; the clamping step of fixing a relative position of the first plate and the second plate at a clamping position corresponding to a size of the clamped first mold and second mold, and maintaining the clamped state, wherein the clamping step includes the steps of: fitting a clamp groove formed at a tip end of a substantially cylindrical clamp rod provided on the first plate into a clamp portion provided on the second plate, and fixing a relative position between the first plate and the second plate; or fitting a clamp groove formed at the tip of a substantially cylindrical clamp rod provided on the second plate into a clamp portion provided on the first plate, thereby fixing the relative positions of the first plate and the second plate; and changing a distance between a plate provided with the clamping portion, out of the first plate or the second plate, and the clamping portion.

ADVANTAGEOUS EFFECTS OF INVENTION

The tire vulcanizer of the present invention is a simple mechanism, but can be adapted to various mold heights, and is excellent in operability while reducing the size of the apparatus.

The tire vulcanizing method according to the present invention is a tire vulcanizing machine that is a simple mechanism but can be adapted to various mold heights, and is excellent in operability while reducing the size of the machine.

Drawings

Fig. 1(a) is a schematic plan view showing the structure of a conventional tire vulcanizer, and (b) is a schematic front view showing the structure of the tire vulcanizer shown in fig. 1 (a).

Fig. 2(a) is a schematic front view showing a state in which a mold having the largest mold thickness is clamped in a conventional tire vulcanizer, and (b) is a schematic front view showing a state in which a mold having the smallest mold thickness is clamped in a conventional tire vulcanizer.

Fig. 4(a) is a schematic front view showing a state in which a mold having the largest mold thickness is clamped in the tire vulcanizer shown in fig. 3(a), and (b) is a schematic front view showing a state in which a mold having the smallest mold thickness is clamped in the tire vulcanizer shown in fig. 3 (a).

Fig. 5(a) is a schematic plan view showing the structure of a conventional tire vulcanizer having a clamp rod, and (b) is a schematic front view showing the structure of the tire vulcanizer shown in fig. 5 (a).

Fig. 6(a) is a schematic front view showing a state in which a mold having the largest mold thickness is clamped in the tire vulcanizer shown in fig. 5 (a).

Fig. 7(a) is a schematic plan view showing a structure of a second embodiment of a tire vulcanizer to which the present invention is applied, and (b) is a schematic front view of the tire vulcanizer shown in fig. 7 (a).

Fig. 8(a) is a schematic front view showing a state in which a mold having the largest mold thickness is clamped in the tire vulcanizer shown in fig. 7(a), and (b) is a schematic front view showing a state in which a mold having the smallest mold thickness is clamped in the tire vulcanizer shown in fig. 7 (a).

Fig. 9 is a schematic plan view showing the structure of a conventional two-die (two-die) tire vulcanizer, and (b) is a schematic front view showing the structure of the tire vulcanizer shown in fig. 9 (a).

Fig. 10 is a schematic plan view showing a structure of a third embodiment of a tire vulcanizer to which the present invention is applied.

Fig. 11(a) is a schematic plan view showing a structure of a fourth embodiment of a tire vulcanizer to which the present invention is applied, and (b) is a schematic front view of the tire vulcanizer shown in fig. 11 (a).

Fig. 12(a) is a schematic front view showing a state in which a mold having the largest mold thickness is clamped in the tire vulcanizer shown in fig. 11(a), and (b) is a schematic front view showing a state in which a mold having the smallest mold thickness is clamped in the tire vulcanizer shown in fig. 11 (a).

Fig. 13(a) is a sectional view of the guide bar adjusting mechanism when corresponding to a mold having the largest height of the mold, and (b) is a sectional view of the guide bar adjusting mechanism when corresponding to a mold having the smallest height of the mold.

Fig. 14(a) is a schematic front view of a tire vulcanizer in which a pressurizing mechanism has a toroidal cylinder, and (b) is a schematic front view of a tire vulcanizer in which a pressurizing mechanism has a hydraulic cylinder.

Fig. 15(a) is a sectional view of the grip adjusting mechanism of the fifth embodiment of the tire vulcanizer to which the present invention is applied, the section corresponding to the mold having the largest height of the mold, and (b) is a sectional view of the grip adjusting mechanism corresponding to the mold having the smallest height of the mold.

Detailed Description

In order to implement the mode of the invention

Modes for carrying out the invention (hereinafter referred to as "embodiments") will be described with reference to the drawings.

In all the drawings for describing the embodiments, the same or related reference numerals are given to the components having the same functions, and redundant description thereof is omitted. The same applies to not only the drawings showing the structure of the embodiment of the present invention but also the drawings showing the structure of the apparatus according to the prior art.

In the following, a direction substantially parallel to the longitudinal direction of the guide bar 1 will be referred to as "vertical direction" or "vertical direction" with reference to fig. 3 (b). In addition, with reference to fig. 3b, the position of the lower plate 10 relative to the upper plate 5 is referred to as "lower (vertically lower)" or "lower side" in the vertical direction (vertical direction), and the position of the upper plate 5 relative to the lower plate 10 is referred to as "upper (vertically upper)" or "upper side" in the vertical direction (vertical direction).

In the following, a direction substantially orthogonal to the vertical direction (vertical direction) will be referred to as a left-right direction with reference to fig. 3 b. In the left-right direction, the position of the gallbladder 11a with respect to the two guide rods 1 is referred to as "inside" or "inner side", and the position of the two guide rods 1 with respect to the gallbladder 11a is referred to as "outer" or "outer side", with reference to fig. 3 (b).

[ first embodiment ]

A first embodiment of the present invention will be described with reference to fig. 3 and 4.

Fig. 3(a) is a schematic plan view showing a structure of a first embodiment of a tire vulcanizer to which the present invention is applied, and (b) is a schematic front view of the tire vulcanizer shown in fig. 3 (a). The structure shown below is an example of the present invention, and the content of the present invention is not limited to this.

As shown in fig. 3(a) and 3(b), a tire vulcanizer a as a first embodiment of a tire vulcanizer to which the present invention is applied includes two guide bars 1, a mold 2 including an upper mold 2a and a lower mold 2b, an upper plate 5, a lower plate 10, and an upper mold lifting device 8.

The upper die 2a mentioned here corresponds to the second die claimed in the present application, and the lower die 2b corresponds to the first die claimed in the present application. In addition, the upper plate 5 mentioned here corresponds to the second plate claimed in the present application, and the lower plate 10 corresponds to the first plate claimed in the present application. In addition, the upper mold lifting device 8 mentioned here corresponds to the mold moving mechanism claimed in the present application.

The guide rod 1 is a substantially cylindrical rod-shaped body connecting the upper plate 5 and the lower plate 10, and guides the movement of raising and lowering the upper plate 5 by the upper mold raising and lowering device 8.

The upper plate 5 is a plate-like member to which the upper mold 2a is attached via a heat insulating plate 7 and an upper hot plate 6 a. The upper plate 5 is configured to be movable up and down via the upper die lifting and lowering device 8 as described above, and to be variable in distance from the lower plate 10. That is, the upper plate 5 and the upper die 2a are lifted and lowered in an integrated state, and the upper die 2a and the lower die 2b are clamped and released.

The upper plate 5 has a clamp device 4 (see fig. 3 and 4). The clamp device 4 is composed of a clamp block 4a, and is a member that is fitted into a clamp groove 1a or a clamp groove 1b described later to fix the upper plate 5. In addition, the clamp block 4a mentioned here corresponds to a clamp portion claimed in the present application. In addition, the clamping piece 4a and the clamping groove 1a or the clamping groove 1b mentioned here correspond to the clamping mechanism claimed in the present application.

That is, the clamp block 4a constitutes a clamp mechanism for fixing the upper plate 5 at the vulcanizing position of the tire and holding the pressurizing force of the mold 2 together with the clamp groove 1a or the clamp groove 1 b. Further, a known structure provided in a conventional tire vulcanizer can be adopted as a structure for fixing the upper plate 5 by fitting the clamp block 4a into the clamp groove 1a or the clamp groove 1b (see, for example, patent document 2), and therefore, the detailed description thereof is omitted.

The lower plate 10 is a plate-like member to which the lower mold 2b is attached via a screw 3b constituting the mold height adjusting mechanism 3, a mold pressurizing mechanism 9', a heat insulating plate 7, and a lower hot plate 6 b. The lower plate 10 and the upper plate 5 form a pair, and the mold 2 is clamped therebetween. The lower plate 10 is a member that cooperates with the upper plate 5 to clamp the mold 2 in order to hold the pressing force of the mold 2 that has been clamped.

The tire vulcanizer a has a mold height adjusting mechanism 3. The mold height adjusting mechanism 3 is a mechanism that changes the height position of the lower mold 2b with respect to the lower plate 10 in the vertical direction.

The mold height adjusting mechanism 3 of the tire vulcanizer a has the same structure as the mold height adjusting mechanism of the tire vulcanizer 100 described above. However, in the mold height adjusting mechanism 3 of the tire vulcanizer a, by providing a plurality of clamp grooves including the clamp groove 1a and the clamp groove 1b, the distance by which the lower mold 2b is moved up and down is shorter than the distance by which the lower mold 2b is moved up and down in the mold height adjusting mechanism 3 of the tire vulcanizer 100.

The tire vulcanizer a has a mold pressing mechanism 9'. The mold pressing mechanism 9' is a member that applies pressure from the outside to the mold 2 that has been clamped, and holds the pressing force of the mold 2.

The mold pressing mechanism 9' is constituted by a hydraulic cylinder attached to the lower mold 2a via a screw 3 b. Since the mold pressing mechanism by the hydraulic cylinder can be a known structure provided in a conventional tire vulcanizer, a detailed description thereof will be omitted (see fig. 14 (b)).

In the present invention, the cylinder piston is hollow ring-shaped and has an area equal to or larger than the inner and outer diameter areas of the tire having the largest outer diameter as the mold pressing mechanism, and a ring-shaped mold pressing mechanism 9 (see fig. 14(a)) pressurized by a compressed gas such as nitrogen or air may be used.

In the present invention, a structure may be adopted in which a mold pressing mechanism is provided at an upper portion of the mold. Further, as the mold pressurizing mechanism, a system may be adopted in which a hydraulic cylinder is disposed at the lower end of the guide rod, and after clamping, the guide rod is pulled down to apply a pressurizing force to the mold.

The guide bar 1 is fixed to the lower plate 5 at its lower end side. The upper end side of the guide bar 1 is inserted into an insertion hole 5a provided in the upper plate 5 (see fig. 3 a). The upper die lifting device 8 is constituted by a hydraulic cylinder.

In addition, two clamp grooves 1a (lower side) and two clamp grooves 1b (upper side) are formed in the outer peripheral surface of the guide bar 1 on the path along which the upper plate 5 moves (see fig. 3 (b)). The clamp groove 1a and the clamp groove 1b are portions for fixing the position of the upper plate 5 in the vertical direction by fitting the clamp blocks 4 a.

The clamp groove 1a is a groove portion that becomes a clamping position when the mold 2 having the smallest mold height (the minimum thickness mold) is used. That is, the groove portion is used to fix the position of the upper plate 5 in the vertical direction to the mold 2 having the smallest mold thickness of the mold 2 at the time of mold clamping.

The clamp groove 1b is a groove portion that becomes a clamping position when the mold 2 having the largest mold height (maximum thickness mold) is used. That is, the groove portion is used to fix the position of the upper plate 5 in the vertical direction to the mold 2 having the largest mold thickness of the mold 2 at the time of mold clamping.

Here, the upper mold 5 does not necessarily need to be configured to be movable up and down by the upper mold lifting and lowering device 8, and a structure in which the mold 2 can be clamped and the clamped mold 2 can be clamped by the upper and lower plates is sufficient. That is, a mechanism for moving the upper mold 5 up and down with respect to the fixed lower mold 10 is not necessarily limited. For example, the upper mold 5 may be fixed, and the lower mold 10 may be moved up and down by a mold lifting and lowering device.

The upper mold lifting device 8 does not necessarily have to be constituted by a hydraulic cylinder, and other mechanisms may be employed if the upper mold 5 can be lifted. For example, the upper plate 5 may be raised and lowered by a motor-driven screw system in which a motor and screw structure is combined.

Further, a plurality of clamp grooves are formed in the guide bar 1 in accordance with the size (mold height) of a mold that can be attached to the tire vulcanizer a, but if the number is two or more, the number is not particularly limited. In the structure of the present invention, three or more clamp grooves may be provided in the guide bar in a range in which the strength of the guide bar can be secured according to the size of the die to be used.

Further, it is not always necessary that the clamp groove 1a be a clamping position when the mold 2 (minimum thickness mold) having the smallest height of the mold is used. For example, the tire vulcanizer a may have a mold height in a range in which the tire vulcanizer a can be attached, and the clamp groove 1a may be formed in the guide bar in accordance with a mold having the mold height exceeding a minimum value of the range.

It is not always necessary that the clamp groove 1b be a clamping position when the mold 2 having the largest height of the mold (the maximum thickness mold) is used. For example, the tire vulcanizer a may have a mold height in a range in which the tire vulcanizer a can be attached, and the clamp groove 1b may be formed in the guide bar in accordance with a mold having a mold height less than the maximum value of the range.

As shown in fig. 3(b), the upper die 2a and the lower die 2b are a pair and constitute the die 2 (see fig. 4(a) and 4 (b)). The upper mold 2a and the lower mold 2b are clamped, and the green tire 13 (green tire) disposed inside is heated and pressurized.

More specifically, the gallbladder 11a is disposed between the upper mold 2a and the lower mold 2 b. The bladder 11a supports the green tire 13 and the vulcanized tire, and presses the green tire 13 against the mold 2 to perform molding of the tire under high-temperature and high-pressure conditions.

The gallbladder 11a is supplied with a vulcanizing agent from a vulcanizing agent supply source, not shown, and is configured to be expandable and contractible. During vulcanization of the tire, the green tire 13 held by the bladder 11a from the inner peripheral surface side is covered by the upper mold 2a and the lower mold 2 b.

In addition, the tire vulcanizer a has a bladder elevating device 11. The bladder lifting device 11 is a device that lifts and lowers the bladder 11a to change the vertical height position in the tire vulcanizing step. The gallbladder elevating device 11 is configured to be controlled in its operation in conjunction with the operation of the upper mold elevating device 8.

Here, the guide bar 1 is not necessarily used as a member for guiding the upward and downward movement of the upper plate 5, and may be a member other than the guide bar 1 if the structure is capable of forming a plurality of clamp grooves while guiding the upward and downward movement of the upper plate 5. For example, in a structure in which the upper plate is guided by a guide rail or a guide groove as found in a conventional plate-type tire vulcanizer, a structure in which a plurality of clamp grooves are formed in the guide rail or the guide groove may be employed.

The following describes a series of operations of tire vulcanizing performed by the tire vulcanizing machine a as the first embodiment of the present invention described above.

First, the green tire 13 is held by a not-shown tire loading device, and the tire loading device is lowered to attach the green tire 13 to the outside of the bladder 11 a.

The upper plate 5 is lowered along the guide bar 1 by the upper die lifting device 8, and the upper die 2a and the lower die 2b are engaged and closed (mold closing of the die 2). By lowering the upper plate 5, the clamp block 4a of the upper plate 5 is fitted into the clamp groove 1a or the clamp groove 1b of the guide bar 1 selected in accordance with the height of the mold 2.

Fig. 4(a) shows a state in which the clamp blocks 4a of the upper plate 5 are fitted in the clamp grooves 1b of the guide bar 1, and the position of the upper plate 5 in the vertical direction is fixed by the clamp mechanism (the thickness of the mold 2 is maximized, that is, the height of the mold 2 is maximized).

Fig. 4(b) shows a state in which the clamp blocks 4a of the upper plate 5 are fitted in the clamp grooves 1a of the guide bar 1, and the position of the upper plate 5 in the vertical direction is fixed by the clamp mechanism (the thickness of the mold 2 is minimized, that is, the height of the mold 2 is minimized).

That is, after the upper mold 2a and the lower mold 2b are engaged and clamped, the clamp blocks 4a of the upper plate 5 are fitted into the clamp grooves 1a or the clamp grooves 1b of the guide bar 1, and the mold 2 is clamped by the upper plate 5 and the lower plate 10.

Further, a vulcanizing heat medium such as steam is supplied into the bladder 11a and expanded along the inside of the green tire 13. In addition, the gallbladder 11a is lowered to the fully closed position of the mold 2 via the gallbladder lifting device 11 while synchronizing with the lowering operation of the upper mold 5 a.

After the mold 2 is clamped and clamped, the mold 2 is pressurized by the pressurizing device 9'. Further, the green tire 13 is heated from the outer peripheral side of the mold 2 through the upper hot plate 6a and the lower hot plate 6b from the outside. Further, a vulcanizing heating medium such as steam is supplied into the bladder 11a, and the green tire 13 is heated from the inside and pressed against the inner surface of the mold 2 to be pressurized, thereby starting tire vulcanization.

After the vulcanization of the tire is completed, the pressure of the pressurizing device 9' is reduced and released from the pressurized state, and the fitting between the clamp block 4a and the clamp groove 1a or the clamp groove 1b is released. Further, the upper mold 2a is raised to release the vulcanized tire from the clamped state.

The bladder 11a is separated from the tire by the bladder lifting and lowering device 11, and the tire is taken out of the tire vulcanizer a by a tire taking-out device not shown, and the tire is transferred to the next step. Through the above-described flow, the tire vulcanization of the green tire in the tire vulcanizer a is completed.

Next, an example of the operation procedure when the mold is replaced with a mold having a different size in the tire vulcanizer a according to the first embodiment of the present invention will be described.

First, when a replacement mold is set, the screw 3b of the mold height adjusting mechanism 3 is lowered to the lowest limit. When the height of the mold to be replaced is previously determined, the mold height adjusting mechanism 3 is lowered in advance so that the screw 3b is positioned below the position of the clamping groove used at the time of clamping.

Subsequently, the upper plate 5 is lowered to the mold closing position by the upper mold lifting and lowering device 8. Here, the detection of the mold closing position can be performed by pressure or position control in the case of the upper mold lifting and lowering device 8 constituted by a hydraulic cylinder. In addition, if the upper die lifting device 8 is electrically driven, detection can be performed by torque control or position control.

Then, the lower die 2b is pushed up by the die height adjusting mechanism 3 with the processing force of the upper plate 5 being free (in a state where the pressure by the pressing mechanism 9' is not applied). When the upper die 2a is pushed up by the lower die 2b and a not-shown protrusion provided on the upper plate 5 reaches a clamping position (clamping groove), the protrusion is detected by a not-shown sensor provided at the position of the clamping groove of the guide bar 1. That is, by detecting the protrusion by the sensor, the clamping groove can be detected.

Next, the clamp block 4a of the clamp device is fitted into the clamp groove, and after confirmation, pressure is introduced into the pressing mechanism 9', and it is confirmed by a pressure sensor provided in the pressing mechanism 9' that the replaced mold is normally pressed. When the pressurization to the replaced mold is confirmed, the operation of replacing the mold in the tire vulcanizer a is completed.

In addition, although the mold replacement operation described above is partially automated, the same operation may be performed by manual work performed by an operator.

The tire vulcanizer a according to the first embodiment of the present invention described above can select the clamp groove 1a or the clamp groove 1b provided in the guide bar 1 according to the height of the mold 2 to be used.

That is, the clamped mold 2 can be clamped by the clamping device 4 at an appropriate clamping position. As a result, the distance by which the lower mold 2b is raised by the mold height adjusting mechanism 3 is shortened, and the tire vulcanizer in which the height position of the mold 2 from the floor surface on which the tire vulcanizer a is installed is not extremely increased can be obtained.

Further, the guide bar 1 has a simple structure in which a plurality of clamp grooves are provided. Therefore, the apparatus structure can be realized without greatly modifying the existing equipment.

[ second embodiment ]

A second embodiment of the present invention will be described with reference to fig. 7 and 8. In the following description, the second embodiment will be described centering on differences from the first embodiment described above, and redundant description will be omitted.

As shown in fig. 7(a) and 7(B), a tire vulcanizer B as a second embodiment of a tire vulcanizer to which the present invention is applied includes two clamp rods 14.

The clamp rod 14 is a substantially cylindrical rod-shaped body having an upper end fixed to the upper plate 5, and is a member in which a clamp groove 14a (lower side) or a clamp groove 14b (upper side) provided on a lower end side is fitted to a clamp block 4a provided on the lower plate 10 to fix the upper plate 5. In addition, the clamping block 4a and the clamping groove 14a or the clamping groove 14b mentioned here correspond to the clamping mechanism claimed in the present application.

The clamp groove 14a is a groove portion that becomes a clamping position when the mold 2 (maximum thickness mold) having the maximum mold height is used. That is, the groove portion is used to fix the position of the upper plate 5 in the vertical direction to the mold 2 having the maximum mold thickness of the mold 2 at the time of mold clamping (see fig. 8 (a)).

The clamp groove 14b is a groove portion that serves as a clamping position when the mold 2 (minimum thickness mold) is used, in which the height of the mold is minimized. That is, the groove portion is used to fix the position of the upper plate 5 in the vertical direction to the mold 2 having the smallest mold thickness of the mold 2 at the time of mold clamping (see fig. 8 (b)).

In the tire vulcanizer B, unlike the tire vulcanizer a, the guide bar 1 is not provided with a clamp groove. That is, in the tire vulcanizer B, the clamp groove 14a or the clamp groove 14B of the clamp rod 14 is fitted to the clamp block 4a constituting the clamp device 4 of the lower plate 10, thereby fixing the upper plate 5 and maintaining the pressing force of the mold 2 during tire vulcanization.

In the tire vulcanizer B, the upper plate 5 is lowered by the upper mold lifting and lowering device 8, the clamp rod 14 is also lowered, and the clamp groove 14a or the clamp groove 14B on the lower end side is fitted to the clamp block 4 a.

Fig. 5 and 6 show, for reference, a structure of a conventional tire vulcanizer having a clamp lever.

Here, it is not always necessary to have a structure in which the upper end of the clamp rod 14 is fixed to the upper plate 5 and is fitted into the clamp block 4a provided on the lower plate 10. For example, the lower end of the clamp rod may be fixed to the lower plate 10, the upper end side thereof may be provided with a clamp groove, and the upper plate 5 may be provided with the clamp device 4 (clamp block 4 a).

Further, a plurality of clamp grooves are formed in the clamp rod 14 in accordance with the size of a mold that can be attached to the tire vulcanizer B, but if the number is two or more, the number is not particularly limited. Here, three or more clamp grooves may be provided in the clamp rod in a range in which the strength of the guide rod 14 can be secured according to the size of the die to be used.

In addition, the clamp groove 14a is not necessarily required to be a clamping position when the mold 2 (maximum thickness mold) is used in which the height of the mold is the maximum. For example, the tire vulcanizer B may have a mold height in a range in which the tire vulcanizer B can be mounted, and the clamp groove 14a may be formed in the guide bar in accordance with a mold having the mold height smaller than the maximum value of the range.

The clamp groove 14b is not necessarily required to be a clamping position when the mold 2 (minimum thickness mold) is used, at which the height of the mold is minimum. For example, the tire vulcanizer B may have a mold height in a range in which the tire vulcanizer B can be attached, and the clamp groove 14B may be formed in the guide bar in accordance with a mold having the mold height exceeding a minimum value of the range.

In addition, it is not necessarily required that the clamp groove is provided only on the clamp lever 14. For example, a structure may be adopted in which a clamp groove is provided in the guide bar 1 and a clamp block 4a is provided in the upper plate 5 in addition to the clamp bar 14. Further, a plurality of clamp grooves may be provided in the guide bar 1.

Further, the positions of the clamp grooves provided in the clamp bar 14 and the clamp grooves provided in the guide bar 1 are made to correspond to each other, and the position of the upper plate 5 can be firmly fixed via the respective clamp grooves, whereby the clamping force with respect to the mold 2 that has been clamped can be increased. Further, it is possible to provide a structure in which the positions of the clamp groove provided in the clamp rod 14 and the clamp groove provided in the guide bar 1 are different from each other, so that the number of selectable clamp positions is increased, and it is further easy to cope with molds having different sizes.

The tire vulcanizer B as the second embodiment of the present invention described above can select the clamp groove 14a or the clamp groove 14B provided in the clamp rod 14 according to the height of the mold 2 to be used.

That is, the clamped mold 2 can be clamped by the clamping device 4 at an appropriate clamping position. As a result, the distance by which the lower mold 2B is raised by the mold height adjusting mechanism 3 is shortened, and the tire vulcanizer in which the height position of the mold 2 from the floor surface on which the tire vulcanizer B is installed is not extremely increased can be obtained.

Further, the clamp rod 14 can be configured to have a simple structure in which a plurality of clamp grooves are provided. Therefore, the apparatus structure can be realized without greatly modifying the existing equipment.

[ third embodiment ]

A third embodiment of the present invention will be described with reference to fig. 10. In the following description, the third embodiment will be described centering on differences from the first and second embodiments, and redundant description will be omitted.

Fig. 10 is a schematic front view showing a structure of a third embodiment of a tire vulcanizer to which the present invention is applied.

As shown in fig. 10, a tire vulcanizer C as a third embodiment of a tire vulcanizer to which the present invention is applied is provided with one guide bar 1 and two clamp bars 14. The tire vulcanizer C is a two-mold tire vulcanizer having two molds 2 each composed of an upper mold 2a and a lower mold 2 b.

The tire vulcanizer C is a tire vulcanizer in which two molds 2 are lifted and lowered simultaneously. Two upper molds 2a are mounted on the upper plate 5 via heat insulating plates 7 and upper heating plates 6 a. Further, two lower molds 2b are mounted on the lower mold 2b via screws 3b, a mold pressing mechanism 9', a heat insulating plate 7, and a lower hot plate 6 b.

In the tire vulcanizer C, the clamp rod 14 is a substantially cylindrical rod-shaped body having a lower end fixed to the lower plate 10, and is a member in which the clamp groove 14a or the clamp groove 14b provided on the upper end side is fitted to the clamp block 4a provided on the upper plate 5 to fix the lower plate 10.

Further, the tire vulcanizer C is configured such that the upper plate can be moved up and down by the upper mold lifting and lowering device 8. Further, in the tire vulcanizer C, a guide block 15 for guiding the upper end side of the clamp rod 14 toward the clamp block 4a is provided.

In the tire vulcanizer C, two grip grooves 1a (lower side) and 1b (upper side) are formed on the path along which the upper plate 5 moves on the outer peripheral surface of the guide bar 1. The positions of the clamp grooves 1a and 1b are formed in accordance with the positions of the clamp grooves 14a and 14b provided in the clamp rod 14. That is, the tire vulcanizer C has a clamping position where it is clamped by the clamping groove 1a and the clamping groove 14a and a clamping position where it is clamped by the clamping groove 1b and the clamping groove 14 b.

Here, it is not always necessary to form the two molds 2 to be lifted and lowered simultaneously. For example, two molds may be independently movable up and down, and a clamping mechanism may be provided in accordance with the height of each mold.

It is not always necessary that the positions of the clamp grooves 1a and 1b are formed so as to coincide with the positions of the clamp grooves 14a and 14b provided in the clamp rod 14. For example, the positions of the clamp grooves 1a and 1b and the positions of the clamp grooves 14a and 14b may be formed differently. This increases the number of clamping positions that can be selected in accordance with the mold height, and facilitates wider correspondence with molds having different mold heights.

In addition, it is not necessarily required to form a clamping groove on each of the guide bar 1 and the clamping bar 14. For example, a plurality of clamp grooves may be formed only in the guide bar 1 or a plurality of clamp grooves may be formed only in the clamp bar 14. Further, a structure in which two or more guide rods 1 are provided, or a structure in which one or three or more clamp rods 14 are provided may be employed.

In the tire vulcanizer C, the upper plate 5 is lowered by the upper mold lifting and lowering device 8, and the clamp block 4a provided on the upper plate 5 is fitted into the clamp groove 1a or the clamp groove 1b of the guide bar 1. When the upper plate 5 is lowered, the clamp groove 14a or the clamp groove 14b provided on the upper end side of the clamp rod 14 is fitted to the clamp block 4a provided on the upper plate 5.

Fig. 9(a) and 9(b) show, for reference, a structure of a conventional tire vulcanizer including two molds, a guide bar, and a clamp bar.

The tire vulcanizer C as the third embodiment of the present invention described above can select the clamp groove 1a or the clamp groove 1b provided in the guide bar 1 and the clamp groove 14a or the clamp groove 14b provided in the clamp bar 14 according to the height of the mold 2 to be used.

Further, the clamp rod 14 has a simple structure in which a plurality of clamp grooves are provided. Therefore, the apparatus structure can be realized without greatly modifying the existing equipment.

[ fourth embodiment ]

A fourth embodiment of the present invention will be described with reference to fig. 11 to 13. In the following description, the fourth embodiment will be described centering on differences from the first to third embodiments, and redundant description will be omitted.

Fig. 11(a) is a schematic plan view showing a structure of a fourth embodiment of a tire vulcanizer to which the present invention is applied, and fig. 11(b) is a schematic front view of the tire vulcanizer shown in fig. 11 (a). Fig. 12(a) is a schematic front view showing a state in which a mold having the largest mold thickness is clamped in the tire vulcanizer shown in fig. 11(a), and fig. 12(b) is a schematic front view showing a state in which a mold having the smallest mold thickness is clamped in the tire vulcanizer shown in fig. 11 (a). Fig. 13(a) is a sectional view of the guide bar adjusting mechanism corresponding to a mold having the largest height of the mold, and fig. 13(b) is a sectional view of the guide bar adjusting mechanism corresponding to a mold having the smallest height of the mold.

As shown in fig. 11(a) and 11(b), a tire vulcanizer D as a fourth embodiment of a tire vulcanizer to which the present invention is applied includes two guide rods 1. Further, a guide bar adjusting mechanism 200 is provided on the lower end side of each guide bar 1, and the guide bar 1 is configured to be vertically movable up and down with respect to the lower plate 10.

In addition, the guide bar adjusting mechanism 200 mentioned here is a guide bar adjusting mechanism in the claims of the present application. In fig. 11(b), for the sake of convenience of explanation, only the right guide bar adjusting mechanism 200 of the two guide bar adjusting mechanisms 200 is partially shown in its cross-sectional structure.

Further, two clamp grooves 1a (lower side) and two clamp grooves 1b (upper side) are formed in the guide bar 1 on the path along which the upper plate 5 moves.

The guide bar adjusting mechanism 200 of the tire vulcanizer D includes a guide bush 22, an adjusting screw 23, an adjusting screw driving device 24, a bearing 25, a thrust pad 26, and a rotation stop guide 27 (see fig. 13 a and 13 b).

The guide bush 22 is rotatably held on the lower plate 10 via a bearing 25 and a thrust pad 26. A screw portion (no reference numeral) is formed on the inner peripheral surface of the lower portion of the guide bush 22.

The guide rod 1 slidably passes through the guide bush 22, and an adjustment screw 23 is fixed to a lower end of the guide rod 1. Further, a rotation stop guide 27 is provided near the lower end of the adjustment screw 23. The adjusting screw drive 24 is a member that rotates the guide bush 22.

Further, a screw portion formed on the inner peripheral surface of the lower portion of the guide bush 22 engages with an adjustment screw 23 fixed to the guide bar 1. The guide bush 22 is rotated by the adjustment screw driving device 24, and the adjustment screw 23 is moved up and down along the screw portion, and by this operation, the guide rod 1 is moved up and down with respect to the lower plate 10.

In the tire vulcanizer D, the guide bar 1 can be moved up and down with respect to the lower plate 10 by the guide bar adjusting mechanism 200. This enables the positions of the clamp grooves 1a and 1b provided in the guide bar 1 to be changed to desired height positions.

That is, unlike the first to third embodiments of the present invention described so far, the clamping position can be freely changed and matched with respect to different mold heights without providing the mold height adjusting mechanism 3.

In other words, by increasing the distance by which the guide bar 1 can be raised and lowered by the guide bar adjusting mechanism 200, it is possible to make the number of the clamp grooves provided in the guide bar 1 single. That is, without providing a plurality of clamp grooves, the clamp position can be made to coincide with different mold heights only by the operation of raising and lowering the guide bar 1 to match the position of the clamp groove with an appropriate height position.

Here, the tire vulcanizer D may further include, as the clamping mechanism, a clamp rod having a clamp groove formed therein and a clamp block engageable with the clamp groove.

[ fifth embodiment ]

A fifth embodiment of the present invention will be described with reference to fig. 15. In the following description, the fifth embodiment will be described centering on differences from the first to fourth embodiments, and redundant description of the components will be omitted.

Fig. 15(a) is a cross-sectional view of the grip adjusting mechanism provided in the fifth embodiment of the tire vulcanizer to which the present invention is applied, the cross-sectional view corresponding to the mold having the largest height of the mold, and fig. 15(b) is a cross-sectional view of the grip adjusting mechanism corresponding to the mold having the smallest height of the mold.

As shown in fig. 15(a) and 15(b), a tire vulcanizer E as a fifth embodiment of a tire vulcanizer to which the present invention is applied is configured such that a clamp device 4 is provided on an upper plate 5, and the height position of the clamp device 4 with respect to the upper plate 5 can be changed by a clamp adjustment mechanism. Note that, with respect to the tire vulcanizer E, the entire structure is omitted, and the description will be given mainly on the structure as the grip adjusting mechanism of the present embodiment.

The tire vulcanizer E includes two guide bars 1 (only one of which is shown in the drawing).

In fig. 15(a) and 15(b), for the sake of convenience of explanation, only the right one of the two pinching adjusting mechanisms has a partially illustrated cross-sectional structure.

Further, two clamp grooves 1a (lower side) and two clamp grooves 1b (upper side) are formed in the guide bar 1 on the path along which the upper plate 5 moves.

The clamp adjustment mechanism includes a clamp block 4a, a sleeve 4b, a rotation stop flange 4c, a guide bush 22, an adjustment screw 23, an adjustment screw driving device 24, a thrust pad 26, and a rotation stop guide 27 (see fig. 15 a and 15 b).

A substantially cylindrical sleeve 4b is attached to a clamp block 4a of the clamp device 4, which is engaged with and fixed to the clamp groove 1a or the clamp groove 1 b. The sleeve 4b supports the clamp block 4a and is a member that moves up and down with respect to the upper plate 5 integrally with the clamp block 4 a.

Further, a female screw (not shown) that engages with the adjustment screw 23 rotatably attached to the upper plate 5 is disposed on the inner periphery of the sleeve 4 b. Further, a rotation stop flange 4c slidably engaged with a rotation stop guide 27 provided on the upper plate 5 is formed on the outer periphery of the lower end portion of the sleeve 4 b. In addition, the guide rod 1 slidably penetrates the guide bush 22.

The adjusting screw 23 is held by a thrust pad 26 and is configured to be rotatable by an adjusting screw driving device 24.

In the tire vulcanizer E, the height position of the clamp device 4 (clamp block 4a) relative to the upper plate 5 can be changed by rotating the adjustment screw 23 via the adjustment screw driving device 24 and moving the sleeve 4b engaged with the adjustment screw 23 up and down. That is, by changing the position of the clamp 4, the clamping position at which the clamp 4 is fitted into the clamp groove 1a or the clamp groove 1b of the guide bar 1 can be adjusted.

In this way, in the tire vulcanizer E, since the clamping position can be changed by the clamping adjustment mechanism, unlike the first to third embodiments of the present invention described so far, the clamping position can be freely changed and matched with different mold heights without providing the mold height adjustment mechanism 3.

In other words, by increasing the distance over which the clamp device 4 can be raised and lowered by the clamp adjustment mechanism, it is possible to make the number of clamp grooves provided in the guide bar 1 single. That is, without providing a plurality of clamp grooves, the clamping position can be made to coincide with different mold heights only by the operation of raising and lowering the clamping device 4 to match the position of the clamp block 4a with an appropriate height position.

Here, in the tire vulcanizer E, a clamp rod having a clamp groove formed therein and a clamp block engageable with the clamp groove may be further provided as a clamp mechanism. In the configuration in which the clamp lever is provided, the clamp adjusting mechanism may be provided in a clamp device corresponding to a clamp groove formed in the clamp lever. Further, instead of providing the guide bar with the clamp groove, a clamp groove formed in the clamp bar may be combined with the clamp adjustment mechanism.

Further, the clamp device 4 and the clamp adjusting mechanism are not necessarily required to be provided on the upper plate 5, and the lower plate 10 may be configured to be movable up and down along the guide bar 1, and the clamp device 4 and the clamp adjusting mechanism may be provided on the lower plate 10. However, by providing the clamping device 4 and the clamping adjustment mechanism on the upper plate 5, these structures can be arranged at positions separated from the gallbladder 11a provided on the lower plate 10 and the mold to which the mold is clamped. As a result, the influence of high temperature generated from the gallbladder 11a and the mold, leakage of the vulcanizing agent, and the like is less likely to be exerted on the clamping adjustment mechanism, and the durability of the clamping adjustment mechanism can be improved. Further, when the clamp adjustment mechanism is repaired or inspected in the event of failure, the gallbladder and the mold do not need to be removed, and the maintenance work can be facilitated.

In the tire vulcanizer E, compared to the tire vulcanizer D according to the fourth embodiment of the present invention, it is not necessary to provide the guide bar adjustment mechanism 200 to the long guide bar 1 located in the tire vulcanizer D. That is, in the assembly and assembly work to the structure of the conventional tire vulcanizer, the clamp adjustment mechanism can be provided more easily than the guide bar adjustment mechanism 200. Even if the parts constituting the clamp device 4 and the clamp adjustment mechanism are worn, the guide bar 1 is less affected, and the precision of the operation of opening and closing the mold is easily maintained.

As described above, the tire vulcanizer of the present invention is a simple mechanism, but can be adapted to various mold heights, and is excellent in operability while reducing the size of the apparatus.

Further, the tire vulcanizing method of the present invention is a tire vulcanizing method using a tire vulcanizing machine which is simple in mechanism, can cope with various mold heights, is reduced in size, and is excellent in operability.

Description of the symbols

1: a guide bar; 1 a: a clamping groove; 1 b: a clamping groove; 2: a mold; 2 a: an upper die; 2 b: a lower die; 3: a mold height adjustment mechanism; 3 a: a nut; 3 b: a screw; 4: a clamping device; 4 a: a clamping block; 4 b: a sleeve; 4 c: a rotation stopping flange; 5: an upper plate; 6 a: a hot plate is arranged; 6 b: a lower hot plate; 7: a heat insulation plate; 8: an upper mold lifting device; 9: a mold pressing mechanism (ring type); 9': a mold pressurizing mechanism (hydraulic cylinder type); 10: a lower plate; 11: a gallbladder lifting device; 11 a: a gallbladder; 12: a tire; 13: a green tire; 14: a clamping lever; 14 a: a clamping groove; 14 b: a clamping groove; 15: a guide block; 200: a guide bar adjustment mechanism; 22: a guide bush; 23: adjusting the screw rod; 24: adjusting the screw drive; 25: a bearing; 26: a thrust pad; 27: a rotation stopping guide member.

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