阅读说明：本技术 分离锁定装置和使用它的注塑成形模具组件 (Separation locking device and injection molding die assembly using the same ) 是由 西村胜利 于 2019-11-18 设计创作，主要内容包括：一种注塑成形模具用的分离锁定装置,即便在锁定杆(13)插入了锁定构件(8)的状态下也能够解除基部保持件(2)与锁定构件(8)的连结,实现锁定杆(13)的稳定的移动、构造的简化、制造、组装的容易化、小型化。在基部保持件(2)内置有第1卡合件(6)和第1弹簧(7),在锁定板(10)插入至板插入孔(4)的位置,第1卡合件(6)移动至锁定位置而使基部保持件(2)与锁定构件(8)连结,在锁定杆(13)从杆插入孔(3)拔出时将第1卡合件(6)压动至基部保持件(2)与锁定构件(8)的连结解除的解锁位置。(A separation locking device for an injection molding mold, which can release the connection between a base holder (2) and a locking member (8) even when the locking rod (13) is inserted into the locking member (8), and which realizes stable movement of the locking rod (13), simplification of the structure, and facilitation and miniaturization of manufacturing and assembly. A1 st engaging piece (6) and a 1 st spring (7) are built in the base holder (2), and when the locking plate (10) is inserted to the plate insertion hole (4) position, the 1 st engaging piece (6) is moved to the locking position to connect the base holder (2) and the locking member (8), and when the locking lever (13) is pulled out from the lever insertion hole (3), the 1 st engaging piece (6) is pressed to the unlocking position where the connection between the base holder (2) and the locking member (8) is released.)

1. A separation locking device is characterized in that,

the disclosed device is provided with: a base holder (2) having a vertically-penetrating rod insertion hole (3) and a plate insertion hole (4) arranged in parallel, a locking member (8) having a locking plate (10) inserted into the plate insertion hole (4), a locking lever (13) that is insertable into and removable from the rod insertion holes (3, 9) of the base holder (2) and the locking member (8), a 1 st engaging piece (6) and a 1 st spring (7) built in the base holder (2), and a 2 nd engaging piece (11) provided in the locking plate (10),

the base holder (2) has: a guide hole (5) for guiding the movement of the 1 st engaging piece (6) in the direction orthogonal to the hole axis of the rod insertion hole (3),

the guide hole (5) is a hole that communicates the rod insertion hole (3) with the plate insertion hole (4),

the 1 st engaging piece (6) has: a locking claw (6a) which is exposed and exposed from the guide hole (5) to the board insertion hole (4) and a 1 st input portion (6b) which is exposed and exposed from the guide hole (5) to the lever insertion hole (3),

the lock plate (10) has: a recess (12) into which a protruding portion of the locking claw (6a) toward the board insertion hole (4) enters,

the lock lever (13) has a 1 st cam surface (13a) for pressing the 1 st input portion (6b) protruding toward the lever insertion hole (3) into the guide hole (5) at one side portion thereof, and has an interference avoidance recess (13b) for receiving the 1 st input portion (6b) protruding toward the lever insertion hole (3) at a portion above the 1 st cam surface (13a),

the 1 st engaging piece (6) is selectively moved to a locking position and an unlocking position by being pressed in opposite directions by the 1 st spring (7) and the locking lever (13),

the locking claw (6a) protrudes toward the plate insertion hole (4) in a state where the 1 st engaging piece (6) is at the locked position, and the locking claw (6a) is sunk into the guide hole (5) in a state where the 1 st engaging piece (6) is at the unlocked position,

the locking claw (6a) is locked with the 2 nd engaging piece (11) when the 1 st engaging piece (6) is in the locked position to prevent the locking plate (10) from being pulled out from the plate insertion hole (4),

when the 1 st engaging piece (6) is at the unlocking position, the engagement between the locking pawl (6a) and the 2 nd engaging piece (11) is released, and the locking plate (10) can be pulled out from the plate insertion hole (4).

2. The separation locking device according to claim 1,

the direction of the 1 st engaging piece (6) biased by the 1 st spring (7) is set to the direction from the locked position to the unlocked position of the 1 st engaging piece (6),

the 1 st engaging piece (6) includes a 2 nd input portion (6e) protruding toward the lever insertion hole (3) when the 1 st engaging piece (6) is in the unlock position, the 2 nd input portion (6e) faces the lock pawl (6a) toward the rear surface and faces the 1 st input portion (6b) with the lever insertion hole (3) therebetween,

further, the locking lever (13) further includes: a 2 nd cam surface (13d) for depressing the 2 nd input part (6e) and causing the 2 nd input part to sink into the guide hole (5), a locking position holding part (13e) for preventing the 2 nd input part (6e) sinking into the guide hole (5) from returning and holding the 1 st engaging piece (6) at a locking position,

the movement of the 1 st engaging piece (6) from the unlocked position to the locked position and the movement of the 1 st engaging piece (6) from the locked position to the unlocked position are both performed by pressing the 1 st engaging piece (6) with the lock lever (13).

3. A split locking device according to claim 1 or 2,

the 2 nd engaging piece (11) is biased by a 2 nd spring (14) so as to be slidable on the lock plate (10) and is retractably built in from an engaging portion with the engaging claw (6a), the sliding direction of the 2 nd engaging piece (11) is set to a direction orthogonal to the hole axis of the plate insertion hole (4),

at least either the upper surface of the locking claw (6a) or the lower surface of the locking plate (10) that is in contact with the upper surface of the locking claw (6a) generates a component force in a direction that causes the 2 nd engaging element (11) to sink into the locking plate (10) at the contact portion of these surfaces, and the recess (12) extends from the root to the lower end of the locking plate (10).

4. The separation locking device according to claim 1,

the 1 st engaging piece (6) is moved to the locking position by pressing the 1 st engaging piece (6) by the 1 st spring (7),

the movement of the 1 st engaging piece (6) to the unlocked position, which is moved to the locked position, is performed by pressing the 1 st input portion (6b) in a direction opposite to the biasing direction of the 1 st spring (7) by the lock lever (13).

5. The separation locking device according to claim 1,

the locking claw (6a) of the 1 st engaging piece (6) and the portion having the 1 st input portion (6b) are divided between the lever insertion hole (3) and the plate insertion hole (4) of the base holder (2), the 1 st spring (7) is interposed between the locking claw (6a) and the portion having the 1 st input portion (6b), the locking claw (6a) is received by the portion having the 1 st input portion (6b) at a projection end point, and is guided to the portion having the 1 st input portion (6b) so as to allow the 1 st spring (7) to be compressed from the receiving position and retracted,

the separation locking device further includes a 3 rd spring (17) that urges a portion of the 1 st click member (6) having the 1 st input portion (6b) toward an unlocked position,

at least either one of the upper surface of the locking claw (6a) or the corner of the lower surface of the 2 nd engaging piece (11) that is in contact with the upper surface of the locking claw (6a) is an inclined surface that generates a component force in a direction in which the locking claw (6a) protruding toward the plate insertion hole (4) is sunk into the guide hole (5) at the contact portion of the surfaces, and the recess (12) is provided midway from the root to the lower end of the locking plate (10).

6. An injection mold assembly comprising a fixed mold (32), a movable mold (34) forming a molding cavity (33) between the fixed mold and the movable mold, and a stripper plate (35) in contact with and separated from the movable mold, wherein the stripper plate (35) is pulled away from the movable mold (34) before the movable mold (34) is separated from the fixed mold (32), and the injection mold assembly is made of resin or metal,

the injection molding die assembly is characterized in that,

the base holder (2) of the separation lock device (1) according to any one of claims 1 to 5 is fixed to one of the fixed mold (32) and the movable mold (34), the lock member (8) is fixed to the other, the lock bar (13) is attached to the stripper plate (35), and the separation lock device (1) is provided on both sides of the mold assembly.

Technical Field

The present invention relates to a separation lock device used by being attached to a mold of an injection molding machine for molding resin or metal, and an injection mold assembly using the same.

Background

The aforementioned separation locking device is mainly used in a three-plate type injection molding machine to give a certain order to the separation of the movable mold and the stripper plate.

The three-plate type injection molding machine includes a stripper plate which is brought into contact with and separated from a movable mold, in addition to a fixed mold and a movable mold which form a molding cavity.

The tip of the runner cover is inserted into the stripper plate, and the molten material of the resin or the metal supplied through the runner cover in this state is guided to a gate provided in the movable mold and injected into the cavity.

Thereafter, the stripper plate is pulled and separated from the movable mold, and the runner portion formed between the stripper plate and the movable mold is cut off from the product (the injection material in the cavity).

Next, the movable mold is separated from the fixed mold, and the cured product (resin or metal molded product) in the cavity is taken out of the mold.

In this way, the stripper plate is moved before the movable mold is separated from the fixed mold, thereby preventing deformation of the product.

In this method, until the stripper plate is moved to a certain position to separate the runner portion from the product, it is necessary to maintain the coupling state of the movable mold with respect to the fixed mold (prevent separation of the parting surface), and for this purpose, a separation lock device is used.

One of the separation locking means has the following means: the mold includes a base holder, a lock member, and a lock lever attached to a stripper plate of a three-plate injection molding machine, the base holder and the lock member being provided corresponding to a fixed mold and a movable mold of the three-plate injection molding machine, and the holding of the coupled state of the base holder and the lock member and the release of the holding are performed by a change in the insertion state of the lock lever with respect to the lock member.

An example of the separation lock device of this type is shown in fig. 23. The separation lock device in this figure is a device described in patent document 1 below as a conventional technique, and includes a lock lever 51 attached to the stripper plate 35.

The lock lever 51 is inserted between an engagement claw 53 having the support pin 52 as a pivot fulcrum and the base holder 55, and maintains the engagement state of the engagement claw 53 with respect to the lock claw 54.

When the lock lever 51 is disengaged from the base holder 55, the engagement claw 53 can be pressed by the push rod 56 biased by the spring and disengaged from the lock claw 54, and the lock member 57 is released from the coupling with the base holder 55, so that the movable mold 34 is separated from the fixed mold 32.

In order to solve the problems of the apparatus of fig. 23 and the apparatus of patent document 2 (automatic mold opening and closing apparatus), the inventors of the present application developed a separation lock apparatus of patent document 1.

The separation locking device of fig. 17 has the following problems 1) to 3), and the like, and the separation locking device of the mold of patent document 2 has the following problems 4), and the like.

1): when the stripper plate 35 is raised, the lock claw 54 may be pressed against the engaging claw 53 and may not move to the unlocking point.

2): the stroke of the lock lever 51 (i.e., the stroke of the stripper plate 35) when the engagement between the engagement claw 53 and the lock claw 54 is released becomes large, and a loss occurs in the movement of the injection molding machine.

3): when the engagement claw 53 is pushed by the lock lever 51 and moves to the engagement point with the lock claw 54, the support pin 52 receives a bending force to deteriorate the operation of the engagement claw 53, and there is a possibility that stable engagement and disengagement of the engagement claw 53 with respect to the lock claw 54 are hindered.

4): the automatic mold opening and closing device of patent document 2 does not have the problem of 2), but has the same problem as 1), that is, the engaging piece which engages with the engaging recess to maintain the coupled state of the movable mold and the fixed mold is sandwiched between the lock rod and the engaging recess when the stripper plate is raised, which makes it difficult to move the lock rod and hinders the separation of the movable mold from the fixed mold.

In the separation lock device of patent document 1, an engaging piece incorporated in a lock member is engaged with an engaging recess provided in a base holder, and a coupled state of the base holder and the lock member is maintained.

The engaging piece is forcibly pressed to the unlocking point by the lock lever when the stripper plate is raised, thereby solving the problems 1) and 4).

Further, the pressing of the engaging piece to the unlocking point by the lock lever is performed before the lock lever is completely pulled out from the plate insertion hole provided in the base holder, thereby solving the problem of 2) described above.

Further, the problem of 3) above is solved by retaining the engaging piece by the concave portion of the base holder when the stripper plate is raised, without applying a bending force to the guide shaft that supports the engaging piece.

Patent document 1 WO2017/037893 publication

Patent document 2 Japanese patent No. 3761690

The separation lock device of patent document 1 can release the coupled state of the base holder and the lock member even in a state where the lock lever is inserted into the lock member, and can ensure stable movement of the lock lever, but there is still room for improvement with respect to simplification of the structure, facilitation of manufacturing and assembling, and downsizing.

Disclosure of Invention

An object of the present invention is to provide a separation lock device for an injection mold, which has the features of the separation lock device of patent document 1 for solving the problems of 1) to 4) described above, and which is simplified in structure, and is easy and compact to manufacture and assemble as compared with the separation lock device of patent document 1.

In order to solve the above problem, the present invention is configured as follows.

Namely, the apparatus is provided with: a base holder having a vertically penetrating rod insertion hole and a plate insertion hole arranged in parallel, a locking member having a locking plate inserted into the plate insertion hole, a locking rod insertable into and removable from each of the base holder and the locking member, a 1 st engaging piece and a 1 st spring built in the base holder, and a 2 nd engaging piece provided on the locking plate, wherein the base holder includes: a guide hole for guiding movement of the 1 st engaging piece in a direction orthogonal to a hole axis of the rod insertion hole, the guide hole serving as a hole for communicating the rod insertion hole with the plate insertion hole, the 1 st engaging piece including: a locking claw which is inserted into and withdrawn from the guide hole to the plate insertion hole, and a 1 st input portion which is inserted into and withdrawn from the guide hole to the lever insertion hole, wherein the locking plate includes: a recess into which a protruding portion of the locking claw protruding toward the plate insertion hole enters, wherein the lock lever has a 1 st cam surface that presses (sinks into) the 1 st input portion protruding toward the lever insertion hole in one side portion thereof, and has a recess for interference avoidance that receives the 1 st input portion protruding toward the lever insertion hole in a portion above the 1 st cam surface, and wherein the 1 st engaging element is selectively moved to a locking position and an unlocking position by being pressed in a direction opposite to the 1 st spring and the locking orientation, and wherein the locking claw protrudes toward the plate insertion hole in a state in which the 1 st engaging element is in the locking position, and wherein the locking claw sinks into the guide hole in a state in which the 1 st engaging element is in the unlocking position, and wherein the locking claw and the 2 nd engaging element lock the locking claw when the 1 st engaging element is in the locking position to prevent the locking plate from being pulled out from the plate insertion hole, when the 1 st engaging piece is at the unlocking position, the engagement between the locking pawl and the 2 nd engaging piece is released, and the locking plate can be pulled out from the plate insertion hole.

The movement of the 1 st engaging piece to the locking position is performed by pressing the 1 st engaging piece with the spring or pressing the 1 st engaging piece with the locking lever.

In the separation lock device in which the 1 st engaging piece is moved to the lock position by being pressed by the spring, the 1 st engaging piece can be biased by the spring in any direction from the plate insertion hole side of the base holder toward the rod insertion hole side and from the rod insertion hole side toward the plate insertion hole side.

The 1 st engaging element moved to the lock position is returned to the unlock position by the 1 st input portion being pressed in a direction opposite to the biasing direction of the 1 st spring by the lock lever or a spring provided separately from the 1 st spring.

As a particularly preferred form, the following configuration is also considered: the locking claw and the portion having the 1 st input portion of the 1 st engaging piece are divided between the lever insertion hole and the plate insertion hole of the base holder, and the locking claw is biased in the locking direction by a 1 st spring, and the portion having the 1 st input portion is biased in the unlocking direction by a spring (a 3 rd spring described in the embodiment) provided separately from the 1 st spring.

Further, the separation locking device in which the 1 st engaging element is pressed by the locking lever and moved from the unlock position to the lock position includes a 2 nd input portion, and the 2 nd input portion protrudes into the lever insertion hole when the 1 st engaging element is in the unlock position with the 1 st engaging element facing the 1 st engaging element in the biasing direction in which the 1 st engaging element is biased by the 1 st spring.

Further, the locking lever further includes: a 2 nd cam surface that presses the 2 nd input portion and causes the 2 nd input portion to sink into the guide hole (thereby moving the 1 st engaging piece to the lock position) when the lock lever inserted into the lever insertion hole moves in the lock direction (downward); and a locking position holding portion that prevents the 2 nd input portion that is submerged in the guide hole from returning and holds the 1 st engaging piece at a locking position.

The above-described 2 nd engaging piece considers: the locking device is provided with two forms of a form which is integrally formed with the locking plate and a form which is biased by a spring, can slide on the locking plate and can be arranged in a mode of retreating from an engagement part locked with the locking claw.

The 2 nd engaging piece which is biased by a spring and is slidably incorporated in the lock plate includes a 2 nd spring, the 2 nd spring biases the 2 nd engaging piece to protrude from the inside of the lock plate toward the recess of the lock plate in a direction in which the 2 nd engaging piece slides and is orthogonal to the hole axis of the plate insertion hole.

Further, at least either the upper surface of the locking claw or the lower surface of the 2 nd engaging element that is in contact with the upper surface of the locking claw generates a component force in a direction of sinking the 2 nd engaging element into the locking plate at the contact portion of the surfaces.

In the case where the object to be installed is a three-plate type injection molding machine, the separation lock device configured as described above is used by fixing the lock member to the movable mold of the injection molding machine and fixing the lock lever to the stripper plate of the injection molding machine, in the fixed mold fixing base holder of the molding machine.

The invention also provides an injection molding die assembly of the injection molding machine, wherein the separation locking device is arranged on two sides. Details of the injection mold assembly will be described later.

The separation locking device of the present invention releases the coupled state of the locking member with respect to the base holder not only when the locking lever is pulled out from the locking member but also when the locking lever is not pulled out from the lever insertion hole of the base holder. Therefore, the lock rod does not need to be made a large stroke, and the action loss of the mold can be reduced.

Further, since the 2 nd slide portion of the 1 st engaging element is pushed by the 2 nd cam surface of the lock lever to introduce the locking claw into the guide hole and the engaged state of the locking claw and the 2 nd engaging element is forcibly released, even when a force to separate the locking member from the base holder is applied to press the locking claw against the 2 nd engaging element, the locking claw can be reliably disengaged from the 2 nd engaging element, and the release of the coupling between the base holder and the lock member is stabilized.

Further, when the locking claw is introduced into the guide hole, there is no member that provides resistance to the removal of the locking plate from the plate insertion hole, and the removal of the locking plate from the plate insertion hole and the detachment of the locking member from the base holder can be performed smoothly.

Therefore, the injection mold using the separation lock device separates the movable mold from the fixed mold without hindrance.

The base holder may include a main body in which a desired portion of one surface is dug down, a cover plate attached to one surface of the main body, and a 1 st engaging piece and a 1 st spring incorporated in the main body.

The lock member may be configured by a body having a lock plate provided in a downwardly hanging manner, a recess for receiving a locking claw provided in the lock plate, and a 2 nd engaging piece (a structure including the 2 nd engaging piece that slides is additionally provided with the 2 nd spring) for engaging the locking claw, and therefore, compared with the device of patent document 1, simplification of the structure, simplification of manufacturing and assembly, and downsizing can be achieved.

In the separation locking device in which the 2 nd engaging piece is slidably incorporated in the locking plate, even when the 1 st engaging piece is pressed toward the locking position by the locking lever before the locking plate is inserted into the plate insertion hole, the locking plate can be inserted into the plate insertion hole to connect the base plate and the locking member and maintain the connection.

In the three-plate type injection molding machine, when the 1 st engaging piece is pressed toward the locking position by the locking lever before the locking plate is inserted into the plate insertion hole, the locking claw of the 1 st engaging piece protrudes toward the locking plate insertion hole when the locking plate is inserted into the plate insertion hole.

In this situation, when the 2 nd engaging piece is fixed, the locking claw projecting into the plate insertion hole becomes an obstacle and hinders the insertion of the locking plate into the plate insertion hole, but the structure in which the 2 nd engaging piece is slidably incorporated into the locking plate does not cause such a problem.

Drawings

Fig. 1 is an exploded perspective view showing an example (embodiment 1) of a separation lock device according to the present invention.

Fig. 2 is a side view of the separation lock device of fig. 1 in a state where the cover plate of the base holder is removed and in a state where a part of the lock plate of the lock member is cut.

Fig. 3 is a cross-sectional view of the base retainer of the separation lock apparatus of fig. 1 taken along line X-X of fig. 2.

Fig. 4 is a partially cut-away side view showing the separation lock device of fig. 1 in a state in which the base holder and the lock member are coupled to each other.

Fig. 5 is a partially cut side view showing a state where the locking lever of the separation lock device of fig. 1 presses the 1 st engaging element to the unlocking position.

Fig. 6 is a side view showing a modification of the lock member of the separation lock device according to embodiment 1.

Fig. 7 is a side view of the separation lock device (embodiment 2) in which the biasing direction of the spring by the 1 st engaging piece is set to the direction opposite to that of the embodiment 1, in a state in which the cover plate of the base holder is removed, and in a state in which a part of the lock plate of the lock member is cut.

Fig. 8 is an exploded perspective view showing another example (embodiment 3) of the separation lock device of the present invention.

Fig. 9 is a perspective view showing the separation lock device of fig. 8 in a state in which the coupling between the base holder and the lock member is released and in a state in which the cover plate of the base holder and the cover of the lock plate are removed.

Fig. 10 is a perspective view showing the separation lock device of fig. 8 in a state in which the coupling between the base holder and the lock member is released, in a state in which the cover plate of the base holder and the cover of the lock plate are removed, and in a state in which the side surface on the opposite side to fig. 9 is in the front.

Fig. 11 is a side view showing the separation locking device of fig. 8 in a state of being a cover of the locking plate from which the cover plate of the base holder and the locking member are removed.

Fig. 12 is a perspective view showing a state in which the separation locking device of fig. 8 is a cover of the locking plate from which the cover plate of the base holder and the locking member are removed, and the base holder and the locking member are coupled.

Fig. 13 is a side view showing a state in which the separation locking device of fig. 8 is a cover of the locking plate from which the cover plate of the base holder and the locking member are removed, and the base holder and the locking member are coupled.

Fig. 14 is a side view showing a state where the locking lever of the separation locking device of fig. 8 presses the 1 st engaging piece to the lock release position with the cover plate of the base holder and the cover of the locking plate of the locking member removed.

Fig. 15 is a perspective view of the 2 nd engaging piece incorporated in the lock plate of the separation lock device lock member of fig. 8.

Fig. 16 is an exploded perspective view showing still another example (embodiment 4) of the separation lock device of the present invention.

Fig. 17 is a side view of the separation lock device of fig. 16 in a state in which the base holder and the lock member are removed from the cover plate and in a state in which a part of the lock lever is cut.

Fig. 18 is a side view showing a state in which the locking lever of the separation locking apparatus of fig. 16 is inserted into the base holder before locking the plate, with the cover of the base holder and the locking member removed.

Fig. 19 is a side view showing a state where both the lock lever and the lock plate are inserted into the base holder of the separation lock device of fig. 16, with the covers of the base holder and the lock member removed.

Fig. 20 is a sectional view taken along line X-X of fig. 19.

Fig. 21 is a perspective view showing a modification of the lock plate.

Fig. 22 is a sectional view showing an example of the injection mold of the present invention.

Fig. 23 is a sectional view showing an example of a conventional separation lock device.

Detailed Description

Hereinafter, an embodiment of a separation lock device and an injection mold assembly using the same according to the present invention will be described with reference to fig. 1 to 22 of the drawings.

The separation lock device 1 shown in fig. 1 to 5 (which will be referred to as embodiment 1) has a basic structure, and includes: the locking device includes a base holder 2, a locking member 8 having a locking plate 10, a locking lever 13 that is insertable into and removable from the locking member 8 and the base holder 2, a 1 st engaging piece 6 built in the base holder 2, a 1 st spring 7 that biases the 1 st engaging piece 6 in one direction, and a 2 nd engaging piece 11 provided in the locking member 8 (see fig. 2, 4, and 5).

The base holder 2 is configured by combining a body 2a fastened by a bolt 15 (see fig. 1 and 3) and a cover plate 2b, and has a rod insertion hole 3 penetrating vertically, a plate insertion hole 4 penetrating vertically in the same manner, and a guide hole 5 extending in a direction orthogonal to the hole axis of the rod insertion hole 3.

The rod insertion hole 3 and the plate insertion hole 4 are both square holes, and are formed by machining a groove in one surface of the main body 2a and closing an opening in one surface side of the groove with the cover plate 2b.

The guide hole 5 is a hole that communicates the lever insertion hole 3 and the plate insertion hole 4, and an end portion of the guide hole 5 on the side supporting one end of the 1 st spring 7 enters the inside of the main body 2a in the direction opposite to the biasing direction in which the 1 st spring 7 biases the 2 nd engaging piece 11.

Further, a part of the guide hole 5 is dug deeper than the bottom of the groove forming the rod insertion hole 3 and the plate insertion hole 4, and receives a certain side of the bridge portion 6d of the 1 st engaging piece 6 described later herein.

The rod insertion hole 3 and the plate insertion hole 4 are parallel holes having different sizes, and the insertion of the lock plate 10 into the rod insertion hole 3 is not permitted. This prevents the base holder 2 from being erroneously coupled to the lock member 8.

The 1 st engaging piece 6 and the 1 st spring 7 are incorporated into the guide hole 5 of the base holder 2.

The 1 st engaging piece 6 has a locking claw 6a, a 1 st input portion 6b, and a spring receiving hole 6c into which the other end of the 1 st spring 7 is inserted. The locking claw 6a and the 1 st input portion 6b are connected via a bridge portion 6d, and the 1 st input portion 6b is present at a position facing the front surface of the locking claw 6a.

The bridge 6d has a thickness (dimension in the direction of digging the guide hole 5) equal to the distance from the plate insertion hole 4 to the bottom of the guide hole 5, and does not enter the inside of the plate insertion hole 4.

The engaging claw 6a projects into the plate insertion hole 4 when the 1 st engaging piece 6 is at the end of movement on the rod insertion hole 3 side. Further, the 1 st input portion 6b protrudes toward the rod insertion hole 3 when the 1 st engaging piece 6 is at the end of movement on the rod insertion hole 3 side.

The locking claw 6a has a lower surface extending in a direction perpendicular to the hole axis of the plate insertion hole 4, and has a lower surface engaged with the 2 nd engaging piece 11. Further, an upper surface 6g (see fig. 2) of a portion of the locking claw 6a protruding into the plate insertion hole 4 is inclined in a direction in which the amount of protrusion into the plate insertion hole 4 increases as the position is downward.

When the lock plate 10 is pressed against the inclined upper surface 6g, a component force directed at a contact portion with the lock plate 10 at a right angle to the hole axis of the plate insertion hole 4 is applied to the contact portion, and the 1 st engaging element 6 is pressed in a direction in which the locking claw 6a is inserted into the rod insertion hole 3 by the component force.

A corner of the locking claw 6a at the lower part of the lock plate 10 is preferably also formed as an inclined surface corresponding to the inclined upper surface 6g of the locking claw 6a, and the inclined surface is preferably provided to reduce the surface pressure of the contact portion.

In the 1 st engaging piece 6 of the separation lock device 1 of fig. 1 to 5, the movement end point on the lever insertion hole 3 side (the position where the locking claw 6a protrudes to the plate insertion hole 4 at the maximum) becomes the lock position where the base holder 2 and the lock member 8 are coupled, and the position where the locking claw 6a is retracted into the guide hole 5 becomes the unlock position (the position where the coupling of the base holder 2 and the lock member 8 is released).

The 1 st engaging piece 6 is held in the locked position by the force of the 1 st spring 7 in the initial state before the base holder 2 and the lock member 8 are coupled.

The locking member 8 has a lever insertion hole 9, a locking plate 10, a 2 nd engaging piece 11, and a recess 12 into which the locking claw 6a enters. The rod insertion hole 9 is a hole penetrating vertically and provided in the main body 8a of the lock member 8, and is a hole corresponding in position to the rod insertion hole 3 of the base holder 2.

The lock plate 10 is formed integrally with the body 8a of the lock member 8 and hangs down from the lower portion of the body 8a. Further, a concave portion 12 is provided at one side portion of the lock plate 10, and an upward plane of the concave portion 12 perpendicular to the hole axis of the plate insertion hole 4 becomes a 2 nd engaging piece 11 (engaging surface) and engages the 2 nd engaging piece 11 with the locking claw 6a.

The recess 12 may be a recess for receiving the locking claw 6a, and may be formed by cutting out one side of the lock plate 10 shown in fig. 6, in addition to digging into the lock plate 10.

The lock lever 13 has a 1 st cam surface 13a and an interference avoidance recess 13b on one side surface side. The 1 st cam surface 13a is at the lower portion of the lock lever 13.

The interference avoiding recess 13b is located above the 1 st cam surface 13a. When the lock lever 13 is raised to a position away from the 1 st input portion 6b of the 1 st engaging element 6, the 1 st engaging element 6 moves to the end of the movement on the lever insertion hole 3 side by the force of the 1 st spring 7 to be in a standby state, and the standby state is maintained until the base holder 2 and the lock member 8 are next coupled.

The separation lock device 1 according to embodiment 1 configured as described above is configured such that the 1 st engaging piece 6 is temporarily moved to the unlock position because the 1 st input portion 6b is pushed in by the lock lever 13 when the lock lever 13 is inserted into the lever insertion hole 3 and the lower end of the lock lever 13 passes the installation point of the 1 st engaging piece 6.

However, at this time, the locking plate 10 is not inserted into the plate insertion hole 4 last, and therefore the locking claw 6a is not engaged with the 2 nd engaging piece 11.

Thereafter, the locking plate 10 is inserted into the plate insertion hole 4, and the locking claw 6a is press-fitted, whereby the 1 st engaging element 6 is moved from the locked position to the unlocked position again.

Then, when the recessed portion 12 of the lock plate 10 reaches the set point of the 1 st engaging piece 6, the pushing-in of the lock plate 10 is released, whereby the 1 st engaging piece 6 is returned to the lock position by the force of the 1 st spring 7, the locking claw 6a is locked to the 2 nd engaging piece 11, and the coupled state of the base holder 2 and the lock member 8 is maintained by this locking.

When the lock lever 13 is pulled out from the lever insertion hole 3, the 1 st cam surface 13a of the lock lever 13 pushes the 1 st input portion 6b of the 1 st engaging piece 6 protruding into the lever insertion hole 3 of the base holder 2 into the guide hole 5.

Thereby, the 1 st engaging piece 6 is moved to the unlock position, the locking claw 6a is retracted into the guide hole 5, the locking of the locking claw 6a to the 2 nd engaging piece 11 is released, and the connection between the base holder 2 and the lock member 8 is released.

Further, in the separation and locking device 1 according to embodiment 1, the biasing direction in which the 1 st engaging piece 6 is biased by the 1 st spring 7 is set to the direction in which the 1 st engaging piece 6 is directed from the plate insertion hole 4 side toward the rod insertion hole 3 side, but as shown in fig. 7, it may be set to the direction in which the rod insertion hole 3 side is directed toward the plate insertion hole 4 side (the device of fig. 7 is also referred to as embodiment 2).

The device of embodiment 2 is also different from embodiment 1 in the orientation of the locking claw 6a and the 1 st input portion 6b, and the recess 12 and the 2 nd engaging piece 11 are provided on the other side portion of the lock plate 10.

The 1 st cam surface 13a and the interference avoidance recess 13b are also provided on the other side surface side of the lock lever 13 facing the back surface with respect to the lock plate 10.

Fig. 8 to 15 show still another embodiment of the separation lock device 1 according to the present invention (referred to as embodiment 3). In the apparatus according to embodiment 3, the locking lever 13 presses the 1 st engaging piece 6 to move the 1 st engaging piece 6 to the locking position.

The 1 st engaging piece 6 is biased by the 1 st spring 7 in a direction in which the 1 st engaging piece 6 faces the unlock position.

The 1 st engaging piece 6 includes a 2 nd input portion 6e in addition to the engaging pawl 6a and the 1 st input portion 6b. The locking claw 6a is sized to enter the recess 12 of the lock plate 10.

The 1 st input portion 6b is provided at an end portion of the 1 st engaging piece 6 opposite to the side where the engaging claw 6a is provided, and the 1 st input portion 6b and the engaging claw 6a are connected via a bridge portion 6d.

The 2 nd input portion 6e is located between the locking claw 6a and the bridge portion 6d, faces the locking claw 6a toward the rear surface, and is provided facing the 1 st input portion 6b with the rod insertion hole 3 interposed therebetween.

The 2 nd input portion 6e has a size that can enter a retreat portion 13c provided in the lock lever 13 in order to avoid interference with the lock lever 13.

The 1 st input portion 6b facing the 2 nd input portion 6e with the rod insertion hole 3 therebetween is accompanied by a spacer portion 6f filling the gap between the cover plate 2b and the input portion 6b.

The locking plate 10 is provided with a recess 12 extending from the root of the locking plate 10 to the lower end at one side of the locking plate 10. The 2 nd engaging piece 11 is provided independently from the lock plate 10, and the 2 nd engaging piece 11 is slidably incorporated in the middle of the long side of the lock plate 10.

A 2 nd spring 14 for projecting the 2 nd engaging piece 11 from the inside of the lock plate 10 to the recess 12 is further incorporated in the lock plate 10.

A lower surface 11a (hereinafter, simply referred to as a lower surface) of the 2 nd engaging piece 11 at a portion protruding toward the recessed portion 12 generates a component force in a direction in which the protruding portion of the 2 nd engaging piece 11 with respect to the recessed portion 12 sinks into the lock plate 10 at a contact portion with the locking claw 6a.

The 2 nd engaging piece 11 is provided with a spring receiving hole 11c (see fig. 8 and 11), and one end side of the 2 nd spring 14 is inserted into the spring receiving hole 11c.

The upper surface 6g of the portion of the locking claw 6a protruding into the plate insertion hole 4, which the lower surface 11a contacts, is also a slope corresponding to the lower surface 11a (only either the lower surface 11a of the 2 nd engaging element 11 or the upper surface 6g of the locking claw 6a may be a slope).

A groove for closing the opening of the set-in side by the cover 10a is provided on the surface of the lock plate 10 facing the cover plate 2b, and the 2 nd engaging piece 11 and the 2 nd spring 14 are housed in the groove. The cover 10a is fixed to the main portion of the lock plate 10 by bolts 16 (see fig. 8).

The groove for accommodating the 2 nd engaging piece 11 is partially deep, and the convex portion 11b (see fig. 11, 13 to 15) provided on the side surface of the 2 nd engaging piece 11 enters the deep portion of the groove to prevent the 2 nd engaging piece 11 from being pulled out from the lock plate 10.

The movable 2 nd engaging piece 11 and the 2 nd spring 14 for biasing the same can be employed in both the 1 st and 2 nd embodiments in which the 1 st engaging piece 6 is moved to the lock position by the 1 st spring 7.

The separation lock device 1 according to embodiment 3 further includes a retreat portion 13c in the lock lever 13, a 2 nd cam surface 13d that presses the 2 nd input portion 6e to sink into the guide hole 5 when the lock lever 13 inserted into the lever insertion hole 3 moves in the lock direction (downward), and a lock position holding portion 13e that prevents the 2 nd input portion 6e that sinks into the guide hole 5 from returning and holds the 1 st engaging piece 6 at the lock position.

The escape portion 13c is configured such that approximately half of the side surface of the lock lever 13 on the side having the lock position holding portion 13e in the lock lever thickness direction is recessed in a direction in which the width W (see fig. 8) of the lock lever 13 is narrowed, and is provided on the tip end side of the lock lever 13. The 2 nd cam surface 13d is connected to the terminal end (upper end) of the retreat portion 13c.

In the separation and lock device 1 according to the above-described embodiments 1 and 2, the 1 st cam surface 13a is located at the lower end of the lock lever 13, but in the separation and lock device 1 according to embodiment 3, the 1 st cam surface 13a is located at a position where the lower end of the lock lever 13 contacts the 1 st input portion 6b of the 1 st engaging piece 6 at a position passing through the base holder 2 and applies a force for pushing the 1 st engaging piece 6 into the guide hole 5.

In the separation locking device 1 according to embodiment 3 configured as described above, when the lock lever 13 is inserted into the lever insertion hole 3 and the lower end of the lock lever 13 passes through the installation point of the 1 st engaging element 6, the 1 st input portion 6b is pushed in by the lock lever 13, and the 1 st engaging element 6 moves to the locking position shown in fig. 13.

The 1 st engaging piece 6 moved to the locking position is held at the locking position by the locking position holding portion 13e of the locking lever 13.

At this time, if the locking plate 10 is not yet inserted into the plate insertion hole 4 and the 2 nd engaging piece 11 is integrally provided on the locking plate 10 without moving, the locking claw 6a of the 1 st engaging piece 6 protruding into the plate insertion hole 4 becomes an obstacle and does not allow the insertion of the locking plate 10 into the plate insertion hole 4.

In a three-plate type injection molding machine, the amount of separation of the stripper plate from the movable mold until the movable mold is separated from the fixed mold often increases to a certain extent.

In such an injection molding machine, the insertion of the locking lever 13 into the lever insertion hole 3 is performed before the insertion of the locking plate 10 into the plate insertion hole 4, and therefore, in this case, it is also necessary to allow the insertion of the locking plate 10 into the plate insertion hole 4.

In the devices according to embodiments 1 and 2, the locking claws 6a can retreat when the locking plate 10 is inserted into the plate insertion hole 4, and therefore there is no problem that the locking plate 10 cannot be inserted, but in the separation locking device 1 according to embodiment 3, the 1 st engaging piece 6 is held in the locking position by the preceding locking lever 13 and cannot move.

Here, in the release lock device according to embodiment 3, the 2 nd engaging piece 11 is moved to retract the 2 nd engaging piece 11. The 2 nd engaging piece 11 sinks into the inside of the lock plate 10 by a component force of the lock plate insertion force generated by the contact portion with the lock plate 10.

Therefore, the locking plate 10 can be inserted into the plate insertion hole 4 without interference of the 2 nd engaging piece 11 with the locking claw 6a, and the locking member 8 can be coupled to the base holder 2 without hindrance.

When the locking plate 10 is inserted into the plate insertion hole 4 to the end, the 2 nd engaging piece 11 returns to the original projecting position by the force of the 2 nd spring 14, and engages with the locking claw 6a as shown in fig. 13, thereby maintaining the coupled state of the base holder 2 and the locking member 8.

When the lock lever 13 is pulled out from the lever insertion hole 3, the 1 st cam surface 13a of the lock lever 13 pushes the 1 st input portion 6b of the 1 st engaging element 6 protruding into the lever insertion hole 3 into the guide hole 5 (see fig. 14), as in the case of the devices according to embodiments 1 and 2. Thus, the 1 st catch 6 shifts to the unlocked position, and the locking member 8 can depart from the base holder 2.

In the separation and locking device 1 according to embodiment 3, since both the movement of the 1 st engaging piece 6 from the unlocked position to the locked position and the return from the locked position to the unlocked position are completed by pressing the 1 st engaging piece 6 with the locking lever 13, the reliability of the operation is superior to that of the devices according to embodiments 1 and 2.

Fig. 16 to 20 show still another embodiment of the separation lock device 1 according to the present invention (this embodiment is referred to as embodiment 4). In the separation lock device 1 according to embodiment 4, the locking plate 10 inserted into the plate insertion hole 4 is prevented from coming off from the plate insertion hole 4 by the 1 st spring 7 pressing only the locking claw 6a of the 1 st engaging piece 6 toward the plate insertion hole 4.

As can be seen from fig. 16, the locking claw 6a of the 1 st engaging piece 6 and the portion having the 1 st input portion 6b are divided between the lever insertion hole 3 and the plate insertion hole 4. Further, a 1 st spring 7 is interposed between the locking claw 6a and a portion having the 1 st input portion 6b.

In addition, the method comprises the following steps: a 3 rd spring 17 for pressing the 1 st input portion 6b of the 1 st engaging piece 6 to the unlock position.

The upper surface 6g of the locking claw 6a is a slope that generates a component force in a direction in which the locking claw 6a protruding into the plate insertion hole 4 is caused to sink into the guide hole 5 at a contact portion with the 2 nd engaging piece 11, and the concave portion 12 is provided midway from the root to the lower end of the locking plate 10 provided in the locking member 8, as in the separation lock of fig. 1.

The locking member 8 has a rod insertion hole 9 formed by closing the groove of the external opening with a cover 8b, but the rod insertion hole 9 may be a hole without a cover as shown in fig. 1.

The locking claw 6a is received by a stopper 6h of the portion having the 1 st input portion 6b at the projection end point, and is guided to the portion having the 1 st input portion 6b in such a manner as to allow the 1 st spring 7 to be compressed from the received position and retracted.

In the device of claim 4, instead of inclining the upper surface 6g of the locking claw 6a, a corner portion of the lower surface of the lock plate 10, which is in contact with the locking claw 6a, may be inclined in a direction in which the above-described force component is generated. The upper surface 6g and the corner portion of the lower surface of the lock plate 10 that contacts the locking claw 6a are preferably inclined in the same direction, but only either one may be inclined.

In embodiment 4, a slope of a portion cut from the bottom of the interference avoidance recess 13b formed in one side portion of the lock lever 13 is used as the 1 st cam surface 13a.

In the 4 th embodiment, when the 1 st engaging element 6 is not normally returned to the unlocking position by the force of the 3 rd spring 17, the 1 st cam surface 13a provided on one side portion of the lock lever 13 forcibly presses the 1 st engaging element 6 back to the unlocking position. The other structure of the locking lever 13 is not different from that of embodiment 3.

The separation locking device 1 of embodiment 4 configured as described above allows insertion of the locking plate 10 into the plate insertion hole 4 when the locking lever 13 is inserted into the lever insertion hole 3 before insertion of the locking plate 10 into the plate insertion hole 4, as in embodiment 3.

When the lock lever 13 is not inserted into the lever insertion hole 3, the 1 st engaging piece 6 is held at the unlock position by the force of the 3 rd spring 17, and therefore, the lock plate 10 can be inserted into the plate insertion hole 4 without any problem.

As shown in fig. 18, when the lock lever 13 is inserted into the lever insertion hole 3 first, the 1 st engaging element 6 is pressed to the lock position by the movement of the 2 nd cam surface 13d, and the engaging pawl 6a is in a state of protruding into the plate insertion hole 4.

However, since the locking claw 6a can compress the 1 st spring 7 and sink into the guide groove 5, the locking claw 6a is pressed by the lock plate 10 and temporarily retreats to a position where the insertion of the lock plate 10 is permitted, and thereafter, as shown in fig. 19, the locking claw 6a protrudes again to the plate insertion hole 4 side by the force of the 1 st spring 7 and is inserted into the concave portion 12, and is locked in a non-return state with respect to the 2 nd engaging piece 11.

In the separation and locking device 1 according to the 4 th embodiment, when the 1 st engaging piece 6 is not returned to the unlock position by the force of the 3 rd spring 17, the 1 st engaging piece 6 is pressed to the unlock position by the movement of the cam surface 13a when the lock lever 13 is pulled out from the lever insertion hole 3, and the coupling of the base holder 2 and the lock member 8 is forcibly released, as in the other embodiments.

As can be seen from the figures, the devices of embodiments 1 to 4 have a simpler structure than the device of patent document 1, and can be manufactured and assembled easily and downsized. The device of embodiment 4 is particularly excellent in terms of the effects of simplification and downsizing of the structure, and the device of embodiment 4 is considered to be most advantageous in terms of practical use.

In any of embodiments 1 to 4, the above description has shown the case where the lock member 8 has the rod insertion hole 9 penetrating vertically corresponding to the rod insertion hole 3 of the base holder 2, but the side of the lock member 8 where the rod insertion hole 9 is provided may not be present. The locking member 8 may be omitted by being included in the lever insertion hole 9 on the side closer to the lever insertion hole 9 than the locking plate 10, and may have a shape that does not interfere with the insertion of the locking lever 13 into the lever insertion hole 3 of the base holder 2.

Next, fig. 22 shows an example of an injection mold assembly of a three-plate type injection molding machine using the illustrated separation lock device 1.

The illustrated injection mold assembly 30 has: a fixed mold 32 supported by a fixed plate 31, a movable mold 34 forming a molding cavity 33 with the fixed mold 32, a stripper plate 35 contacting and separating with the movable mold 34, and a runner bushing 36 inserted into 35a of the stripper plate 35 at the time of supplying the molten resin.

Further, the apparatus includes: the runner plate 37 to which the runner cover 36 is attached, the pulling pin 38, the support pin 39 that transmits the movement of the runner plate 37 after the runner plate 37 has moved a predetermined amount to pull the movable mold 34, the push plate 40 disposed at the lower portion of the fixed plate 31, the guide pin 41 and the support post 42 that guide the push plate 40, the ejector pin 43 attached to the push plate 40, the ejector pin 44 that separates the stripper plate 35 from the movable mold 34, and the coil spring 45.

The pull pin 38 is fixed to the stripper plate 35, and after the runner plate 37 moves slightly, the stripper plate 35 follows the movement of the runner plate 37.

Further, a temperature sensor, switches for operation confirmation, a gas discharge portion from the cavity, and the like, which are not shown, are provided.

The movable mold 34 is provided with a gate 34a serving as an inlet of the cavity 33 and a flow path 34b for guiding the molten resin supplied through the sprue bush 36 to the gate 34a. In a mold having a plurality of gates 34a, the resin is distributed to each gate 34a through a flow path 34b.

The above-described separation locking device 1 is mounted on both sides of the injection mold assembly 30. By providing the separation lock device 1 on both sides of the injection mold unit 30, smooth movement of the stripper plate 35 and the movable mold 34 can be ensured.

For each separation lock device 1, the base holder 2 is fixed to the fixed mold 32, the lock member 8 is fixed to the movable mold 34, and the lock lever 13 is mounted to the stripper plate 35.

As shown in fig. 16, in the exemplary injection mold assembly 30, the movable mold 34 is abutted against the fixed mold 32, the stripper plate 35 is abutted against the movable mold 34, and the runner bush 36 is inserted into the runner bush guide 35a, and in this state, the molten resin is supplied to the cavity 33.

Thereafter, the runner plate 37 pulls and moves the stripper plate 35 from the middle to separate the runner portion of the resin remaining in the flow path 34b from the product.

Thereafter, the runner plate 37 continues to move to release the connection between the fixed mold 32 and the movable mold 34 by the separation lock device 1, and in this state, the support pins 39 pull the movable mold 34 to open the cavity 33, and the ejector pins 43 eject the product from the cavity 33.

In addition, the separation lock device is used exclusively in a three-plate type injection molding machine in order to provide a certain order of separation of the movable mold from the stripper plate, but the separation lock device can also be used in a two-plate type injection molding machine for an application in which the abutting state of the movable mold with respect to the fixed mold is maintained for a certain period of time.

If one of the base holder 2 and the lock member 8 is fixed to the fixed mold and the other is fixed to the movable mold, and if a member that moves in the direction of separating the movable mold before the separation of the movable mold is included in the molding machine and the lock lever 13 is attached to the member, the state of coupling of the movable mold to the fixed mold can be reliably maintained until the lock lever 13 moves to the coupling release position.

Description of the reference numerals

Disengaging the locking device; a base retainer; a main body; a cover plate; a rod insertion hole; a plate insertion hole; a guide hole; 1 st engaging member; clamping claws; 1 st input; a spring receiving hole; a bridge portion; a 2 nd input portion; a spacer portion; an upper surface of a portion of the locking claw protruding toward the plate insertion hole; a stop; 1 st spring; a locking member; a main body; a cover; a rod insertion hole; locking plate; a cover; a 2 nd engaging member; a lower surface of a portion protruding into the recess; a convex portion; a spring receiving hole; a recess; a locking bar; a 1 st cam surface; an interference avoidance recess; a relief portion; a 2 nd cam surface; a locking position retaining portion; a 2 nd spring; 15. a bolt; a 3 rd spring; injection molding a mold assembly; a fixation plate; fixing the mold; a mold cavity; a movable mold; a gate; a flow path; a stripper plate; a sprue bush guide; a sprue bush; pouring a road plate; pulling the pin; a support pin; a push plate; a guide pin; a support post; a knockout pin; pushing the ejector pin; 45.. a coil spring; a locking bar; a support pin; 53.. snap-fit claws; a locking pawl; a base retainer; 56.. a pushrod; a locking member.