阅读说明：本技术 一种用于料片检测的感应装置 (A induction system for tablet detects ) 是由 余冬晴 刘鹏 尤宝卿 罗洪松 聂飞 茹承曦 王韦 徐冬生 于 2020-11-19 设计创作，主要内容包括：本发明公开了一种用于料片检测的感应装置,其包括T型安装块,其侧向设置且内部中空；顶杆,其上端恰好从T型安装块的下端圆孔中向上穿出至T型安装块的上端圆孔外,所述顶杆的上端通过阻挡块限位于所述T型安装块的上端圆孔外；感应滑块,其固定于所述顶杆位于T型安装块内部的下部；缓冲弹簧,其套设于所述顶杆位于T型安装块内部的上部,所述缓冲弹簧上下端分别紧抵所述T型安装块和所述感应滑块；接触式传感器,其从所述T型安装块的侧圆通孔中固定穿入至T型安装块内部,且所述接触式传感器的内端与所述感应滑块靠近接触式传感器的侧面平齐。本发明采用顶杆接触高温料片,感应滑块顶起接触传感器的方式,缩短调试时间,提高稳定性。(The invention discloses a sensing device for detecting tablets, which comprises a T-shaped mounting block, a sensing unit and a sensing unit, wherein the T-shaped mounting block is laterally arranged and is hollow inside; the upper end of the ejector rod is just upwards penetrated out of the upper end round hole of the T-shaped mounting block from the lower end round hole of the T-shaped mounting block, and the upper end of the ejector rod is limited outside the upper end round hole of the T-shaped mounting block through a blocking block; the induction sliding block is fixed at the lower part of the ejector rod in the T-shaped mounting block; the buffer spring is sleeved at the upper part of the ejector rod positioned in the T-shaped mounting block, and the upper end and the lower end of the buffer spring respectively tightly abut against the T-shaped mounting block and the induction sliding block; and the contact sensor is fixedly penetrated into the T-shaped mounting block from the side round through hole of the T-shaped mounting block, and the inner end of the contact sensor is flush with the side surface of the induction sliding block close to the contact sensor. The invention adopts the mode that the ejector rod contacts the high-temperature material sheet and the induction slide block jacks up the contact sensor, thereby shortening the debugging time and improving the stability.)

1. The utility model provides an induction system for tablet detects, its installation on unloading robot which characterized in that includes:

the T-shaped mounting block is arranged laterally, the T-shaped mounting block is hollow inside, and three end parts of the T-shaped mounting block are provided with round holes penetrating through the outside;

the upper end of the ejector rod is just upwards penetrated out of the upper end round hole of the T-shaped mounting block from the lower end round hole of the T-shaped mounting block, and the upper end of the ejector rod is limited outside the upper end round hole of the T-shaped mounting block through a blocking block;

the induction sliding block is fixed at the lower part of the ejector rod in the T-shaped mounting block;

the buffer spring is sleeved at the upper part of the ejector rod positioned in the T-shaped mounting block, and the upper end and the lower end of the buffer spring respectively tightly abut against the inner top surface of the T-shaped mounting block and the upper end surface of the induction slide block;

and the contact sensor is fixedly penetrated into the T-shaped mounting block from the side round through hole of the T-shaped mounting block, and the inner end of the contact sensor is flush with the side surface of the induction sliding block close to the contact sensor.

2. The sensing device for web inspection according to claim 1, wherein the touch sensor is locked to the T-shaped mounting block by a hexagonal nut.

3. The sensing device for material sheet detection according to claim 1, wherein one side surface of the T-shaped mounting block is provided with a vertical channel penetrating through the hollow structure of the T-shaped mounting block, the sensing slide block is provided with a central circular hole and is sleeved on the top rod, the side surface of the sensing slide block is provided with two threaded holes penetrating to the top rod, and the sensing slide block is locked on the top rod by two hexagonal bolts penetrating through the vertical channel and being matched with the two threaded holes.

4. The sensing device for detecting the material sheets according to claim 3, wherein the upper end and the lower end of one inner side wall of the T-shaped mounting block are respectively provided with a limiting block for limiting the up-and-down movement of the sensing slide block.

5. The sensing apparatus for web inspection according to claim 1, wherein the T-shaped mounting block is fixed with a heat insulation baffle plate which is shaped like a U and is arranged below the touch sensor, and the heat insulation baffle plate surrounds the touch sensor.

6. The sensing device for material sheet detection according to claim 4, wherein a pair of horizontal baffles are symmetrically and fixedly arranged on the upper end limiting block of the T-shaped mounting block at two sides, the inner end surface of the baffle close to the ejector rod is in a circular arc shape matched with the ejector rod so that the upper end of the buffer spring is tightly abutted against the lower bottom surface of the baffle, pulleys are arranged at two ends of the baffle in the horizontal direction, the baffle is hollow, one end of a pull rope is fixed at each of two sides of the ejector rod corresponding to the pair of baffles, and the other end of the pull rope sequentially penetrates through the two pulleys on the baffle at the corresponding side downwards and then is vertically fixed on the sensing slide block downwards.

7. The sensing device for detecting the material sheets according to claim 6, wherein the upper end round hole of the T-shaped mounting block is provided with a pair of symmetrical inward-recessed hole grooves, and the upper ends of a pair of pull ropes vertically penetrate through the pair of hole grooves upwards and are fixed on the top of the ejector rod, namely the lower bottom surface of the blocking block.

8. The sensing device for detecting the material sheets according to claim 7, wherein the blocking block is internally provided with a pair of symmetrically arranged passages through which the pulling ropes pass, the upper ends of the pulling ropes vertically penetrate through the passages and then are connected into a whole, the middle part of the blocking block is further provided with a first wedge-shaped block, the inclined surface of the first wedge-shaped block is arranged below the first wedge-shaped block, a hollow structure is arranged in the blocking block and only allows the first wedge-shaped block to linearly move in the vertical direction, the upper part of the first wedge-shaped block protrudes into an arc shape and is provided with an arc-shaped groove body which is concave downwards, the pulling ropes are connected into a whole and then are positioned in the groove body, the side surface of the blocking block is further provided with a second wedge-shaped block, the inclined surface of the second wedge-shaped block is arranged above the first wedge-shaped block and the inclined surface of the second wedge-shaped block are vertically opposite, the passages arranged on the side surface of the blocking block only allow the second wedge-shaped So that the pair of pull cords is in a taut or slack state.

9. The sensing apparatus for web inspection as claimed in claim 7, wherein a pair of L-shaped fixing rods are respectively fixed on two opposite outer sides of the second wedge, one end of each fixing rod is perpendicularly fixed on a side surface of the second wedge, the other end of each fixing rod is parallel to the side surface of the second wedge and faces the corresponding blocking block, the other end of each fixing rod is provided with an inwardly recessed threaded channel, the threaded channel is internally threaded with an outer end of a screw, the blocking block is provided with a recessed channel opposite to the screw, and the inner end of the screw is a smooth round rod and is fitted in the recessed channel.

Technical Field

The invention relates to the technical field of detection of clamping signals of hot forming parts. More particularly, the present invention relates to a sensing device for web inspection.

Background

In the production process of the thermal forming part, the material sheet enters the heating furnace to be heated, the red hot material sheet is clamped by the robot or the manipulator and is sent into the press, the pressure maintaining forming is carried out to obtain the semi-finished part, the blanking robot enters the press to clamp the semi-finished part, when the part is clamped, whether the semi-finished part is clamped or not needs to be detected, and after a determination signal is obtained, the manipulator can exit the press. Thereby preventing the situation that the semi-finished product is still left in the mould and the double material of one material sheet is pressed. Having had the unloading sensor, whether can effectively detect the unloading manipulator and press from both sides and get semi-manufactured goods, prevented to appear pressing the extra quality, damaged the condition of mould.

The existing detection tablet form is to use sensor direct contact semi-manufactured goods, the general temperature of the semi-manufactured goods part that obtains after the pressurize is about 200 ℃, and present general sensor connection form is to connect the sensor on the end effector through a vice pole, need consume the adjustment sensor of a large amount of time during the debugging and measure the face to guarantee the inductive distance, in the use, because the motion of end effector, also can lead to the sensor position to take place the skew, unable smooth response part circumstances such as.

Disclosure of Invention

The invention aims to provide a sensing device for detecting a material sheet, which shortens debugging time and improves stability by adopting a mode that a mandril contacts a high-temperature material sheet and a sensing slide block jacks up a contact sensor.

To achieve these objects and other advantages and in accordance with the purpose of the invention, a sensing device for sheet inspection, which is installed on a blanking robot, includes:

the T-shaped mounting block is arranged laterally, the T-shaped mounting block is hollow inside, and three end parts of the T-shaped mounting block are provided with round holes penetrating through the outside;

the upper end of the ejector rod is just upwards penetrated out of the upper end round hole of the T-shaped mounting block from the lower end round hole of the T-shaped mounting block, and the upper end of the ejector rod is limited outside the upper end round hole of the T-shaped mounting block through a blocking block;

the induction sliding block is fixed at the lower part of the ejector rod in the T-shaped mounting block;

the buffer spring is sleeved at the upper part of the ejector rod positioned in the T-shaped mounting block, and the upper end and the lower end of the buffer spring respectively tightly abut against the inner top surface of the T-shaped mounting block and the upper end surface of the induction slide block;

and the contact sensor is fixedly penetrated into the T-shaped mounting block from the side round through hole of the T-shaped mounting block, and the inner end of the contact sensor is flush with the side surface of the induction sliding block close to the contact sensor.

Preferably, the contact sensor is locked to the T-shaped mounting block by a hexagonal nut.

Preferably, one side surface of the T-shaped mounting block is provided with a vertical channel penetrating through the hollow structure inside the T-shaped mounting block, the induction sliding block is provided with a central round hole and is sleeved on the ejector rod, the side surface of the induction sliding block is provided with two threaded holes penetrating through the ejector rod, and the induction sliding block is matched with the two threaded holes through two hexagonal bolts penetrating through the vertical channel to lock the induction sliding block on the ejector rod.

Preferably, the upper end and the lower end of one of the inner side walls of the T-shaped mounting block are provided with limiting blocks for limiting the up-and-down movement of the induction sliding block.

Preferably, a heat insulation baffle is fixed below the touch sensor by the T-shaped mounting block, the heat insulation baffle is U-shaped, and the heat insulation baffle surrounds the touch sensor.

Preferably, a pair of horizontal baffles is symmetrically and fixedly arranged on two sides of an upper end limiting block of the T-shaped mounting block, the inner end face of each baffle, which is close to the ejector rod, is in a shape of a circular arc matched with the ejector rod, so that the upper end of the buffer spring tightly abuts against the lower bottom surface of the baffle, pulleys are arranged on two end portions of each baffle in the horizontal direction, the two ends of each baffle are hollow, one ends of pull ropes are fixed on two sides of the ejector rod, which correspond to the pair of baffles, and the other ends of the pull ropes downwards sequentially penetrate through the two pulleys on the corresponding side baffle and then are vertically fixed on the induction sliding block downwards.

Preferably, the round hole at the upper end of the T-shaped mounting block is provided with a pair of symmetrical inward-recessed hole grooves, and the upper ends of the pair of pulling ropes vertically penetrate upwards through the pair of hole grooves and then are fixed on the top of the ejector rod, namely the lower bottom surface of the stop block.

Preferably, the blocking block is internally provided with a pair of symmetrically arranged passages for the pull ropes to pass through, the upper ends of the pair of pull ropes vertically penetrate through the passages and then are connected into a whole, the middle part in the blocking block is also provided with a first wedge-shaped block, the inclined surface of the blocking block is arranged below the blocking block, a hollow structure is arranged in the blocking block and only allows the first wedge-shaped block to linearly move in the vertical direction, the upper part of the first wedge-shaped block is raised into an arc shape and is provided with an arc groove body which is sunken downwards, the pull rope is connected into a whole and then is positioned in the groove body, the side surface of the stop block is also provided with a second wedge-shaped block, the inclined plane of the first wedge-shaped block is opposite to that of the second wedge-shaped block, a channel arranged on the side face of the blocking block only allows the second wedge-shaped block to linearly move in the horizontal direction, and the second wedge-shaped block is pushed and pulled towards the inside of the blocking block to drive the first wedge-shaped block to linearly move in the vertical direction so that the pair of pull ropes is in a tightened or loosened state.

Preferably, two opposite outsides of second wedge are fixed with the dead lever of a pair of L type respectively, dead lever one end vertical fixation is in on the second wedge side, the other end of dead lever is on a parallel with second wedge side and orientation block the piece, the other end of dead lever has inside sunken screw channel, screw channel female thread fit has the screw rod outer end, block the piece have with the just right shrinkage pool way of screw rod, the inner of screw rod is smooth round rod and cooperate in the shrinkage pool way.

The invention at least comprises the following beneficial effects:

according to the invention, the mode that the original sensor is directly contacted with the high-temperature material sheet is replaced by the ejector rod, the service life of the sensor is prolonged, and after the ejector rod is jacked up, the induction slide block rises to contact the sensor, so that the debugging time of the sensor is effectively shortened, the debugging difficulty of the sensor is reduced, the stability of the sensor is effectively improved in the using process, meanwhile, the requirement of continuous production can be realized, the working efficiency is improved, and the device has the advantage of accurate and rapid adjustment.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic perspective view of an induction device according to the present invention;

FIG. 2 is a schematic diagram of the internal structure of the sensing device of the present invention;

FIG. 3 is a plan view of the internal structure of the T-shaped mounting block of the present invention;

FIG. 4 is a schematic view of one of the side structures of a barrier according to the present invention;

figure 5 is a schematic view of another side construction of a barrier according to the present invention.

Description of reference numerals:

1. contact sensor, 2, thermal-insulated baffle, 3, ejector pin, 4, T type installation piece, 5, response slider, 6, buffer spring, 7, stopper, 8, stop the piece, 9, hex bolts, 10, baffle, 11, pulley, 12, stay cord, 13, first wedge, 14, second wedge, 15, dead lever, 16, screw rod.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 and 2, the present invention provides a sensing device for detecting a material sheet, which is mounted on a blanking robot, and comprises:

the T-shaped mounting block 4 is arranged laterally, the T-shaped mounting block 4 is hollow inside, and three end parts of the T-shaped mounting block are provided with round holes penetrating through the outside;

the upper end of the ejector rod 3 just penetrates out of the upper end round hole of the T-shaped mounting block 4 from the lower end round hole of the T-shaped mounting block 4 upwards, and the upper end of the ejector rod 3 is limited outside the upper end round hole of the T-shaped mounting block 4 through a stop block 8;

the induction sliding block 5 is fixed at the lower part of the ejector rod 3 in the T-shaped mounting block 4;

the buffer spring 6 is sleeved at the upper part of the ejector rod 3 positioned in the T-shaped mounting block 4, and the upper end and the lower end of the buffer spring 6 respectively tightly abut against the inner top surface of the T-shaped mounting block 4 and the upper end surface of the induction slide block 5;

the contact type sensor 1 is fixedly inserted into the T-shaped mounting block 4 from a side circular through hole of the T-shaped mounting block 4, the inner end of the contact type sensor 1 is flush with the side face, close to the contact type sensor 1, of the induction sliding block 5, and the contact type sensor 1 is locked on the T-shaped mounting block 4 through a hexagon nut.

In the above technical scheme, contact sensor 1 inserts in the straight limit section of the same T type installation piece 4 of diameter, adopt hexagon nut locking, response slider 5 and buffer spring 6 are placed in the middle of T type installation piece 4, buffer spring 6 is placed on the upper portion of response slider 5, a buffering for response slider 5 when sliding, ejector pin 3 passes in the round hole at buffer spring 6 and response slider 5 middle part, stop block 8 at 3 top installation of ejector pin, ejector pin 3 is inserted in the middle of T type installation piece 4, ejector pin 3 falls on the top of T type installation piece 4 under the free state, response slider 5 locks on ejector pin 3.

When a blanking manipulator clamps a semi-finished part material sheet, the lower end of the ejector rod 3 contacts the material sheet, and after the semi-finished part material sheet is jacked up by the material sheet, the buffer spring 6 is compressed, the induction slide block 5 rises along with the ejector rod 3 and contacts the circular contact sensor 1, and the contact sensor 1 induces a material sheet clamping signal; after the material piece is put down by the clamp of the blanking manipulator, the lower end of the ejector rod 3 has no resistance and freely falls until the induction slide block 5 falls onto the lower limiting block 7, and the signal disappears.

In another technical scheme, one side surface of the T-shaped mounting block 4 is provided with a vertical channel penetrating through the hollow structure of the T-shaped mounting block, the induction sliding block 5 is provided with a central circular hole and is sleeved on the ejector rod 3, the side surface of the induction sliding block 5 is provided with two threaded holes penetrating through the ejector rod 3, and the induction sliding block 5 is matched with the two threaded holes through two hexagonal bolts 9 penetrating through the vertical channel to lock the induction sliding block 5 on the ejector rod 3.

In the technical scheme, the induction sliding block 5 is locked on the ejector rod 3 through the two hexagon bolts 9, and is convenient to disassemble and replace.

In another technical scheme, the upper end and the lower end of one of the inner side walls of the T-shaped mounting block 4 are provided with limiting blocks 7 for limiting the up-and-down movement of the induction sliding block 5.

In the technical scheme, the limiting block 7 belongs to a part of one cover plate of the T-shaped mounting block 4, two limiting blocks 7 are respectively arranged on the upper part and the lower part of the cover plate of the T-shaped mounting block 4 and used for limiting the sliding stroke of the induction slide block 5, the material sheet is jacked up, and the induction slide block 5 rises to the upper limiting block 7 and contacts with the contact type sensor 1; the lower end of the ejector rod 3 leaves the material sheet, the induction slide block 5 freely slides to the lower limiting block 7, and the signal disappears.

In another technical solution, a heat insulation baffle 2 is fixed to the T-shaped mounting block 4 below the touch sensor 1, and is U-shaped, and the heat insulation baffle 2 surrounds the touch sensor 1.

In the technical scheme, the heat insulation baffle 2 is arranged below the contact sensor 1, and the heat insulation baffle 2 is fixed on the T-shaped mounting block 4, so that the contact sensor 1 is not directly contacted with a material sheet, the mode that the original sensor is directly contacted with a high-temperature material sheet is replaced, and the service life of the sensor is prolonged.

In another technical scheme, as shown in fig. 3, a pair of horizontal baffles 10 are symmetrically and fixedly arranged on the upper end limiting block 7 of the T-shaped mounting block 4 on two sides, the inner end surface of the baffle 10 close to the ejector rod 3 is in a circular arc shape matched with the ejector rod 3 so that the upper end of the buffer spring 6 tightly abuts against the lower bottom surface of the baffle 10, pulleys 11 are arranged on two horizontal end portions of the baffle 10, the baffle 10 is hollow, one end of a pull rope 12 is fixed on each of two sides of the ejector rod 3 corresponding to the pair of baffles 10, and the other end of the pull rope 12 sequentially penetrates through the two pulleys 11 on the baffle 10 on the corresponding side downwards and then is vertically fixed on the induction slider 5 downwards.

In the above technical scheme, response slider 5 is locked on ejector pin 3 through two hexagon bolts 9 lock tightly, the in-process of the free fall of ejector pin 3 downward repetition several times, hexagon bolt 9's lock state may loosen, perhaps hexagon bolt 9 itself takes place smooth silk phenomenon, it still is provided with buffer spring 6 to respond to slider 5 top simultaneously, certain pressure has to respond to slider 5, if it is insecure to take place response slider 5 and ejector pin 3, will lead to response slider 5 can not follow ejector pin 3 smoothly and touch contact sensor 1 upwards, can't accomplish the transmission signal smoothly, for preventing this kind of condition from taking place, further guarantee through the setting of this technical scheme as long as ejector pin 3 is by the tablet jack-up that then response slider 5 must touch contact sensor 1 upwards, accomplish signal transmission. During initial state, response slider 5 is located the below, and stay cord 12 also is in taut state this moment, and when ejector pin 3 was upwards promoted by the tablet, 12 upper ends of stay cord follow ejector pin 3 and move up together, and 12 lower extremes of stay cord also follow the gliding upward movement of response, and under hexagonal bolt 9 will respond to slider 5 and tightly support the state, stay cord 12 atress not, as long as when hexagonal bolt 9 is not inseparable with being connected with response slider 5, 12 atress of stay cord will respond to slider 5 and upwards stimulate, realize dual fail-safe.

In another technical scheme, a pair of symmetrical inward-recessed hole grooves is formed in a round hole at the upper end of the T-shaped mounting block 4, and the upper ends of a pair of pull ropes 12 vertically penetrate through the pair of hole grooves upwards and are fixed to the top of the ejector rod 3, namely the lower bottom surface of the stop block 8.

In the above technical scheme, the ejector rod 3 is in the process of upward movement, and the stay cord 12 also upwards follows the outside of moving to T type installation piece 4, and the round hole that the ejector rod 3 passed also needs to flow out the space that the stay cord 12 passed, consequently realizes through setting up the hole recess.

In another technical solution, as shown in fig. 4 and 5, a channel through which a pair of pull ropes 12 are symmetrically arranged and shuttled is arranged in the stopper 8, the upper ends of the pair of pull ropes 12 vertically penetrate through the channel and then are connected into a whole, a first wedge-shaped block 13 is further arranged in the middle of the stopper 8, the inclined surface of the first wedge-shaped block is arranged below the first wedge-shaped block, a hollow structure is arranged in the stopper 8 and only allows the first wedge-shaped block 13 to linearly move in the vertical direction, the upper part of the first wedge-shaped block 13 protrudes into an arc shape and is provided with an arc-shaped groove body which is recessed downwards, the pull ropes 12 are connected into a whole and then are located in the groove body, a second wedge-shaped block 14 is further arranged on the side surface of the stopper 8, the inclined surface of the second wedge-shaped block 14 is arranged above the inclined surface of the first wedge-shaped block 13 and the inclined surface of the second, pushing and pulling the second wedge block 14 towards the inside of the blocking block 8 drives the first wedge block 13 to move linearly in the vertical direction, so that the pair of pulling ropes 12 are in a tightened or loosened state.

In above-mentioned technical scheme, the upper end of stay cord 12 is connected as an organic whole, just have two lower extremes behind a pair of stay cord 12 becomes a stay cord 12 that promptly, the lower extreme of stay cord 12 is connected to on the response slider 5, when too lax, when needing through stay cord 12 pulling response slider 5, transmission signal may postpone or unable transmission, when too straining, the pressure of stay cord 12 is too big, consequently, connect the upper end of stay cord 12 as an organic whole, first wedge 13 is located the center of blockking piece 8, set up like this and can also guarantee that the pulling force at stay cord 12 both ends keeps balanced unanimously. When equipment just begins to operate, normal debugging has passed through, can be with some suitable laxs of stay cord 12, guarantee the life of stay cord 12, use a period back when equipment, it is very troublesome to unpack apart equipment and debug the maintenance, at this moment, properly tighten stay cord 12 through second wedge 14 to guarantee that it can realize the take-up to response slider 5.

In another technical scheme, a pair of L-shaped fixing rods 15 is respectively fixed on two opposite outer sides of the second wedge-shaped block 14, one end of each fixing rod 15 is perpendicularly fixed on the side surface of the second wedge-shaped block 14, the other end of each fixing rod 15 is parallel to the side surface of the second wedge-shaped block 14 and faces the corresponding blocking block 8, the other end of each fixing rod 15 is provided with an inwardly recessed threaded channel, the threaded channel is internally threaded and matched with the outer end of a screw 16, each blocking block 8 is provided with a concave hole channel opposite to the screw 16, and the inner end of the screw 16 is a smooth round rod and matched in the concave hole channel.

In the above technical solution, how to adjust the position of the second wedge-shaped block 14 and how to fix the position after the adjustment is completed are all problems that need to be considered, a pair of L-shaped fixing rods 15 can be used as handles for adjusting the second wedge-shaped block 14 and can also be used as fixing rod members after adjusting the second wedge-shaped block 14, by rotating the screw rod 16 to be matched with the thread passage of the fixing rods 15, the second wedge-shaped block 14 is close to or away from the blocking block 8, thereby achieving the adjustment of the position, and further achieving the tightening or loosening state of the pull rope 12, the screw rod 16 is matched with the blocking block 8 through the round rod at the left end thereof, the round rod is smoothly matched with the concave passage, so that the convenient rotation can be achieved, and meanwhile, the length of the round rod in the concave passage can also achieve the length matching of the threaded rod at the right end of the auxiliary bolt 16.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.