Transfer apparatus for roll type heavy weight product with clamp structure

Abstract

The present invention provides a roll weight transfer device for receiving a roll-shaped weight having a core pipe in the center from the outside, temporarily fixing the received weight, and then discharging it to the outside again, comprising: a main body housing; a clamp module coupled to protrude from one side of the main body housing so as to allow the core pipe of the weight to be inserted, and operating to fix the inner surface of the core pipe by pressing it while the core pipe is inserted; and a push transfer module coupled to the main body housing and operating to push the weight inserted into the clamp module to the outside.

Description

Technology Field

[0001] The present invention relates to a roll weight transfer device having a clamping structure. More specifically, the invention relates to a roll weight transfer device having a clamping structure that can stably fix a roll weight without damaging external raw materials by pressing the core pipe of the roll weight while the roll weight is inserted, and can maintain a stable operating state by fixing the roll weight through a simple mechanical interlocking structure. Background Technology

[0002] Recently, various process equipment is being installed in manufacturing plants for the production processes of various products.

[0003] A wide variety of process equipment is being developed depending on the products being manufactured or the objects being handled, and devices for transporting products on a manufacturing production line can be considered essential.

[0004] Although product conveying devices are being developed in a wide variety of forms, they are primarily designed for small or lightweight products; consequently, the development of such devices for large or heavy products remains minimal due to the difficulty of handling them.

[0005] Recently, roll-shaped heavy materials are widely used as raw materials for various products. Roll-shaped heavy materials generally consist of a core pipe in the center, with a disc used as a raw material wound around the outer surface of the core pipe.

[0006] In the production process of products using such roll weights, a conveying system is required to transport the roll weights to different process lines depending on the manufacturing process. The conveying system requires a transfer device that receives the roll weights from an external device and transfers them to another external device, and such a transfer device can be utilized in various ways.

[0007] For example, in the case of a reversing device capable of reversing the placement direction of a roll weight, a roll weight transfer device may be used in the process of receiving the roll weight and discharging it again in a reversed placement direction.

[0008] Rolled heavy materials are large and heavy, making them difficult to handle; therefore, it is challenging to implement a transfer device for them using conventional transfer structures applied to small products. In particular, since raw materials are wound around the outer surface of a core shaft, implementing a transfer device is even more difficult because methods such as gripping and towing the roll from the outside can cause damage to the raw materials.

[0009] Therefore, the development of transmission devices for such rolled heavy loads is currently very limited, and research and development in this area is urgently required. Prior art literature

[0010] Korean Patent Publication No. 10-2021-0058256 The problem to be solved

[0011] The present invention was developed to solve the problems of the prior art. The objective of the present invention is to provide a roll weight transfer device having a clamping structure that can stably fix a roll weight without damaging external raw materials by pressing the core pipe of the roll weight while the roll weight is inserted, and in particular, can fix the roll weight through a simple mechanical interlocking structure so that the operating state can be maintained stably. means of solving the problem

[0012] The present invention provides a roll weight transfer device for receiving a roll-shaped weight having a core pipe in the center from the outside, temporarily fixing the received weight, and then discharging it to the outside, comprising: a main body housing; a clamp module coupled to protrude from one side of the main body housing so as to allow the core pipe of the weight to be inserted, and operating to fix the inner surface of the core pipe by pressing it while the core pipe is inserted; and a push transfer module coupled to the main body housing and operating to push the weight inserted into the clamp module to the outside.

[0013] At this time, the clamp module can operate to press and fix or release the inner surface of the core pipe according to the operating state of the push transfer module.

[0014] Additionally, the clamp module comprises: an insertion guide body mounted in a hollow cylindrical shape protruding from one side of the main body housing so that the core pipe of the heavy object can be inserted; a clamping block movably mounted inside the insertion guide body so as to protrude from or be retracted from the outer surface of the insertion guide body; and a clamping operating module operated by the push transfer module to move the clamping block to protrude or be retracted, and the clamping block can protrude to press and fix the inner surface of the core pipe.

[0015] Additionally, the push transfer module may include a push moving body that is arranged to penetrate the insertion guide body in a flat shape and coupled to the main body housing so as to be movable in the front-rear direction; and a push driving unit that moves the push moving body in the front-rear direction along the insertion guide body.

[0016] In addition, the clamping operating module can be operated such that when the push moving body is positioned at a reference position, the weight is inserted into the insertion guide body, the weight is discharged to the outside as the push moving body moves forward from the reference position, and the clamping block protrudes as the push moving body moves backward from the reference position.

[0017] Additionally, the clamping block has an inclined surface formed thereon, and the clamping operating module includes an operating rod coupled to the internal space of the insertion guide body so as to be linearly movable over a certain distance in the front-rear direction; and a pressure inclined block coupled to the outer circumference of the operating rod and having an inclined surface formed thereon to make surface contact with the inclined surface of the clamping block, and as the pressure inclined block moves linearly in the front-rear direction together with the operating rod while the pressure inclined block and the clamping block are in surface contact through the inclined surface, the clamping block can move along the inclined surface and protrude or be retracted.

[0018] In addition, the clamping operating module is formed such that the clamping block protrudes when the operating rod moves backward from a reference position and the clamping block is retracted when the operating rod moves back to a reference position, and the operating rod can move backward by being pressed by the push moving body when the push moving body moves backward.

[0019] In addition, the clamping operating module further includes a first spring positioned at the rear end of the operating rod to apply an elastic force in the forward direction to the operating rod, and the operating rod can return to a reference position by the elastic force of the first spring while in a reverse moving state.

[0020] Additionally, the clamping operating module further includes a rod connecting body coupled to the rear end of the operating rod and moving together with the operating rod, with both ends exposed to the outside of the insertion guide body, and the push moving body is coupled to a pressure plate that engages with the rod connecting body when the push moving body moves backward and presses the rod connecting body in the backward direction, so as to be movable in the forward and backward directions, and the pressure plate can be elastically supported in the backward direction through a separate second spring. Effects of the invention

[0021] According to the present invention, by fixing the roll weight by applying pressure to the core pipe of the roll weight while the roll weight is inserted, the roll weight can be stably fixed without damaging the external raw material, and in particular, the roll weight can be fixed through a simple mechanical interlocking structure, thereby having the effect of maintaining a stable operating state. Brief explanation of the drawing

[0022] FIG. 1 is a perspective view schematically illustrating the external appearance of a roll weight transfer device according to one embodiment of the present invention. FIG. 2 is a side view schematically illustrating the external appearance of a roll weight transfer device according to one embodiment of the present invention. FIG. 3 is a horizontal cross-sectional view illustrated to explain the structure of a clamp module according to one embodiment of the present invention. FIG. 4 is a horizontal cross-sectional view illustrated to explain the clamping operation process of a clamp module according to one embodiment of the present invention. FIG. 5 is a horizontal cross-sectional view illustrated to explain the operation process of transporting a heavy object in a clamp module according to one embodiment of the present invention. Specific details for implementing the invention

[0023] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the present invention, if it is determined that a detailed description of related known components or functions could obscure the essence of the invention, such detailed description is omitted.

[0024] FIG. 1 is a perspective view schematically illustrating the external appearance of a roll heavy object transfer device according to one embodiment of the present invention, FIG. 2 is a side view schematically illustrating the external appearance of a roll heavy object transfer device according to one embodiment of the present invention, FIG. 3 is a horizontal cross-sectional view illustrating the structure of a clamp module according to one embodiment of the present invention, FIG. 4 is a horizontal cross-sectional view illustrating the clamping operation process of a clamp module according to one embodiment of the present invention, and FIG. 5 is a horizontal cross-sectional view illustrating the operation process of transferring a heavy object in a clamp module according to one embodiment of the present invention.

[0025] A roll weight transfer device according to one embodiment of the present invention is a device that receives a roll-shaped weight (10) having a core pipe (11) in the center from the outside, temporarily fixes the received weight, and then discharges it back to the outside, and comprises a main body housing (100), a clamp module (200), and a push transfer module (300).

[0026] The main body housing (100) is configured to support the entire device and is formed to have an internal receiving space, and a separate upper cover (110) is attached to the upper part to block the internal space. The main body housing (100) can be formed to be long in the forward and backward direction for transporting a heavy object (10), and a push transport module (300) is attached to the main body housing (100), and a clamp module (200) is attached to the front surface.

[0027] The clamp module (200) is coupled to protrude from the front surface of the main body housing (100) so that the core pipe (11) of the heavy object (10) is inserted, and operates to fix the inner surface of the core pipe (11) by pressing it while the core pipe (11) is inserted.

[0028] These clamp modules (200) operate to press and fix or release the inner surface of the core pipe (11) depending on the operating state of the push transfer module (300), and this will be explained later.

[0029] The clamp module (200) may include an insertion guide body (210) protrudingly mounted in a hollow cylindrical shape on the main body housing (100) so that the core pipe (11) of the heavy object (10) can be inserted, a clamping block (220) movably mounted inside the insertion guide body (210) so as to protrude from or be retracted from the outer surface of the insertion guide body (210), and a clamping operation module (230) that moves the clamping block (220) to protrude or be retracted. At this time, when the clamping block (220) protrudes, the clamping block (220) pressurizes and contacts the inner surface of the core pipe (11), thereby fixing the heavy object (10).

[0030] The push transfer module (300) is coupled to the main body housing (100) and operates to push a heavy object inserted into the clamp module (200) outward.

[0031] This push transfer module (300) may be configured to include a push moving body (320) which is positioned to penetrate the insertion guide body (210) in a flat shape and coupled to the main body housing (100) so as to be movable in the forward and backward directions, and a push driving unit (330) which moves the push moving body (320) in the forward and backward directions along the insertion guide body (210).

[0032] The push moving body (320) is coupled to a guide rod (310) that is arranged lengthwise in the front-rear direction and moves linearly in the front-rear direction together with the guide rod (310). The guide rod (310) is coupled to the main body housing (100) so as to be able to move linearly in the front-rear direction.

[0033] The push drive unit (330) may be equipped with a cylinder that operates hydraulically or pneumatically, and the piston rod of the cylinder may be coupled to the push moving body (320) to move the push moving body (320) linearly in the forward and backward directions. Of course, this configuration of the push drive unit (330) is exemplary and can be implemented through various linear movement structures, such as a structure using a lead screw and a coupling block.

[0034] This push transfer module (300) can push out a weight (10) inserted into an insertion guide body (210) and transfer it to the outside when the push moving body (320) moves in the forward direction by the push driving unit (330) as shown in FIGS. 2 and 5.

[0035] Depending on the operating state of the push transfer module (300), the clamp module (200) pressurizes or releases the heavy object (10). First, when looking at the operating state of the push transfer module (300), as shown in FIG. 3, when the push moving body (320) is positioned at the reference position (X0), the clamping block (220) remains in a state of being inserted into the insertion guide body (210). In this state, the heavy object (10) can be supplied from an external transfer device (not shown) and inserted into the insertion guide body (210).

[0036] In this way, when the weight (10) is inserted into the insertion guide body (210) and the push moving body (320) moves backward from the reference position (X0) to X1 as shown in FIG. 4, the clamping block (220) protrudes from the insertion guide body (210) and presses and fixes the inner surface of the core pipe (11) of the weight (10).

[0037] When the push moving body (320) moves forward from the reference position (X0) to X2 as shown in FIG. 5, the clamping block (220) remains inserted into the insertion guide body (210), and the heavy object (10) is discharged to the outside by the push moving body (320).

[0038] Looking at each configuration in more detail, first, the clamping operating module (230) is coupled to the insertion guide body (210) so as to be able to move linearly in the forward and backward directions along the longitudinal direction, and the clamping block (220) can be configured to protrude or retract in conjunction with the linear movement of the clamping operating module (230). That is, the clamping block (220) can be configured to protrude or retract in conjunction with the clamping operating module (230), which operates mechanically rather than by a separate electrical configuration.

[0039] At this time, the clamping block (220) can protrude from the insertion guide body (210) to press and fix the inner surface of the core pipe (11). That is, when the clamping block (220) protrudes from the insertion guide body (210), it presses the inner surface of the core pipe (11), and the heavy object (10) can be fixed by this pressing force. Conversely, when the clamping block (220) is inserted into the insertion guide body (210), the pressing force of the clamping block (220) on the inner surface of the core pipe (11) is released, so the heavy object (10) is released from fixation.

[0040] These clamp modules (200) can operate to fix the weight (10) inserted into the insertion guide body (210) while the main body housing (100) moves or rotates while the weight (10) is inserted into the insertion guide body (210).

[0041] For example, a roll weight transfer device according to one embodiment of the present invention may be applied to a reversing device that reverses the arrangement direction of a roll weight, and while the reversing device rotates to reverse the roll weight, a clamp module (200) may operate to fix the weight (10).

[0042] In this manner, when the main body housing (100) rotates or moves while the heavy object (10) is inserted into the insertion guide body (210), there is a risk that the heavy object (10) may be dislodged from the insertion guide body (210) due to centrifugal force or other external forces generated during the rotation process, so it may be desirable for the clamp module (200) to operate to secure the heavy object (10) inserted into the insertion guide body (210).

[0043] Of course, the clamp module (200) operates to release the fixed state of the heavy object (10) during operations such as pushing the heavy object (10) by the push transfer module (300).

[0044] To examine the operating structure of the clamp module (200) in more detail, first, as shown in FIGS. 3 to 5, an inclined surface (221) is formed on the inner side of the clamping block (220).

[0045] The clamping operation module (230) may include an operation rod (231) coupled to the internal space of the insertion guide body (210) so as to be linearly movable over a certain distance in the forward and backward directions, and a pressure inclined block (232) coupled to the outer surface of the operation rod (231) and having an inclined surface (2321) formed on its outer surface so as to make surface contact with the inclined surface (221) of the clamping block (220).

[0046] According to this structure, when the pressure inclined block (232) and the clamping block (220) are in mutual surface contact through the inclined surface (221, 2321) and the pressure inclined block (232) moves in a straight line in the forward and backward direction together with the operating rod (231), the clamping block (220) moves along the inclined surface (221) and protrudes or retracts.

[0047] At this time, the inclined surfaces (221, 2321) of the pressure inclined block (232) and the clamping block (220) may be formed so that the clamping block (220) protrudes when the operating rod (231) moves backward from the reference position (X0), and the clamping block (220) is retracted when the operating rod (231) moves back to the reference position (X0). In this case, the operating rod (231) may be configured to move backward by being pressed by the push moving body (320) when the push moving body (320) moves backward.

[0048] Additionally, the clamping operation module (230) may further include a rod connecting body (233), a first spring (235), a second spring (236), and a pressure plate (237).

[0049] The rod connecting body (233) is coupled to the rear end of the operating rod (231) and can be positioned so that it moves together with the operating rod (231) and both ends are exposed to the outside of the insertion guide body (210). An opening (211) is formed on the side of the insertion guide body (210) so that the rod connecting body (233) passes through and is exposed to the outside, and the opening (211) can be formed in a slot shape that is long for a certain distance in the front-rear direction to allow the rod connecting body (233) to move back and forth. That is, the rod connecting body (233) can move in the front-rear direction by the distance of the opening (211), and the operating rod (231) connected to the rod connecting body (233) can also move in the front-rear direction by that distance.

[0050] The first spring (235) is positioned at the rear end of the operating rod (231) and is formed to apply an elastic force in the forward direction to the operating rod (231). The front end of the first spring (235) is connected to the rear end of the operating rod (231), and the rear end is connected to and supported by the main body housing (100).

[0051] According to this structure, the operating rod (231) can return to a reference position by the elastic force of the first spring (235) in a reverse moving state.

[0052] The pressure plate (237) is coupled to the push moving body (320) so as to be movable in the forward and backward directions through a guide bar (238) coupled to the push moving body (320), and engages with the rod connecting body (233) when the push moving body (320) moves backward, thereby pressing the rod connecting body (233) in the backward direction.

[0053] At this time, the pressure plate (237) is elastically supported in the reverse direction through the second spring (236) ring. The second spring (236) is positioned in a manner that penetrates through the guide bar (238) and is placed between the pressure plate (237) and the push moving body (320).

[0054] In this case, when the push moving body (320) moves backward, the pressure plate (237) moves backward by the elastic force of the second spring (236) and elastically presses the rod connecting body (233) in the backward direction. The rod connecting body (233) moves backward by the elastic force of the second spring (236), and as the operating rod (231) moves backward along with the backward movement of the rod connecting body (233), the clamping block (220) protrudes. At this time, the first spring (235) is compressed.

[0055] As described above, the clamp module (200) can be configured so that the operating rod (231) moves backward by the operation of the push transfer module (300), and more specifically, the push transfer body (320) of the push transfer module (300) can be configured to move backward and move the operating rod (231) backward.

[0056] The push moving body (320) is configured to be coupled through the insertion guide body (210) and to move back and forth along the insertion guide body (210), and the rod connecting body (233) of the clamp module (200) is positioned to protrude from the outer surface of the insertion guide body (210). Therefore, when the push moving body (320) moves backward, the rod connecting body (233) is pressed by the push moving body (320) and moves backward. During the process of the push moving body (320) moving backward, it may be directly engaged with the rod connecting body (233) to press the rod connecting body (233), but in one embodiment of the present invention, the rod connecting body (233) is configured to press by a pressure plate (237) on which the elastic force of the second spring (236) acts.

[0057] Meanwhile, the push transfer module (300) performs the function of pushing a heavy object (10) by moving the push transfer body (320) forward from the reference position (X0) shown in FIG. 3 to the X2 position as shown in FIG. 5, and in addition, it can move backward to the X1 position as shown in FIG. 4 to operate the fixing function of the clamp module (200). The operating state of this push transfer module (300) can be controlled by a control unit. That is, the push transfer body (320) can be controlled to move forward while pushing the heavy object (10), and to move backward for the operation of the fixing function of the clamp module (200).

[0058] As shown in FIG. 3, when the push moving body (320) is positioned at the reference position (X0) and moves backward to the X1 position as shown in FIG. 4, the pressure plate (237) moves backward by the elastic force of the second spring (236) as described above, and elastically presses the rod connecting body (233) in the backward direction. The rod connecting body (233) moves backward by the elastic force of the second spring (236), and the operating rod (231) moves backward along with the backward movement of the rod connecting body (233). At this time, the first spring (235) is compressed. As the operating rod (231) moves backward, the pressure inclined block (232) moves backward, and the clamping block (220) in contact with the pressure inclined block (232) and the inclined surface protrudes from the insertion guide body (210) to press and fix the core pipe (11) of the heavy object (10).

[0059] As shown in enlarged views (a) and (b) of FIG. 4, a gap (t) may exist between the inner surface of the core pipe (11) of the weight (10) and the outer surface of the insertion guide body (210) for smooth movement of the weight (10), and as the clamping block (220) moves outward by the pressure inclined block (232), the clamping block (220) presses and fixes the inner surface of the core pipe (11).

[0060] At this time, the protrusion height of the clamping block (220) corresponding to the movement distance of the push moving body (320) can be designed to be larger than the gap (t) between the inner surface of the core pipe (11) and the outer surface of the insertion guide body (210). In this case, during the intermediate process of the push moving body (320) moving backward, the clamping block (220) comes into contact with and pressurizes the inner surface of the core pipe (11). In this state, as the push moving body (320) moves backward further, the first spring (235) and the second spring (236) are compressed, and the pressurized state of the clamping block (220) against the core pipe (11) is maintained by the elastic force of the compressed first spring (235) and the second spring (236).

[0061] In addition, as the clamping block (220) contacts the inner surface of the core pipe (11), the compression of the first spring (235) and the second spring (236) begins simultaneously, thereby preventing the generation of excessive contact force during the process of the clamping block (220) contacting the core pipe (11) and maintaining a stable operating state. In this respect, the first spring (235) and the second spring (236) act as cushioning materials during the process of the clamping block (220) contacting the core pipe (11).

[0062] Afterwards, when the push moving body (320) returns to the reference position (X0), the rod connecting body (233) and the operating rod (231) move forward and return to the reference position by the elastic force of the first spring (235), and accordingly, the clamping block (220) moves along the inclined surface and is drawn into the interior of the insertion guide body (210), thereby releasing the fixation of the heavy object (10). Afterwards, as shown in FIG. 5, the push moving body (320) continues to move forward to the X2 position to push the heavy object (10) out.

[0063] Meanwhile, at both ends of the insertion guide body (210), as shown in FIG. 2, a weight detection sensor (240) capable of detecting whether a weight (10) is inserted can be installed. Various sensors, such as proximity sensors, optical sensors, and ultrasonic sensors, can be applied to the weight detection sensor (240). The control unit can determine the position of the weight (10) by combining the detection signal values ​​of the two weight detection sensors (240), and can control the operation of the push transfer module (300) based on this.

[0064] That is, if a detection signal detecting a weight is generated at both the front and rear weight detection sensors (240), it can be seen that the weight (10) has been successfully inserted into the corresponding insertion guide body (210). If a detection signal is generated only at the front weight detection sensor (240), it can be seen that the weight (10) is being pushed out of the insertion guide body (210) or is being inserted. If no detection signal is generated at both the front and rear weight detection sensors (240), it can be seen that the weight (10) has been completely discharged to the outside.

[0065] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by these embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0066] 100: Main body housing 110: Upper cover 200: Clamp Module 210: Insertion guide body 220: Clamping Block 230: Clamping operation module 231: Operating Load 232: Pressurized Slope Block 233: Load connection body 235: The first spring 236: The 2nd Spring 237: Pressure plate 238: Guide Bar 240: Heavy object detection sensor 300: Push transfer module 310: Guide Road 320: Push move body 330: Push drive unit

Claims

Claim 1 A roll weight transfer device that receives a roll-shaped weight having a core pipe in the center from the outside, temporarily fixes the received weight, and then discharges it back to the outside, comprising: a main body housing; a clamp module coupled to protrude from one side of the main body housing so as to insert the core pipe of the weight and operating to press and fix the inner surface of the core pipe when the core pipe is inserted; and a push transfer module coupled to the main body housing and operating to push the weight inserted into the clamp module outward, wherein the clamp module comprises: an insertion guide body mounted protruding from one side of the main body housing in a hollow cylindrical shape so as to insert the core pipe of the weight; a clamping block movably mounted inside the insertion guide body so as to protrude from or be retracted from the outer surface of the insertion guide body; and a clamping operation module for moving the clamping block to protrude or be retracted, wherein the clamping block protrudes to press and fix the inner surface of the core pipe. Claim 2 delete Claim 3 In claim 1, the clamping operating module is a roll weight transfer device that moves the clamping block outward or inward by being operated by the push transfer module. Claim 4 In claim 3, the push transfer module comprises: a push moving body arranged to penetrate the insertion guide body in a flat plate shape and coupled to the main body housing so as to be movable in the front-rear direction; and a push driving unit for moving the push moving body in the front-rear direction along the insertion guide body. Claim 5 A roll weight transfer device according to claim 4, wherein the weight is inserted into the insertion guide body while the push moving body is positioned at a reference position, the weight is discharged to the outside as the push moving body moves forward from the reference position, and the clamping operating module operates so that the clamping block protrudes as the push moving body moves backward from the reference position. Claim 6 A roll weight transfer device according to claim 5, wherein the clamping block has an inclined surface formed thereon, and the clamping operating module comprises: an operating rod coupled to the internal space of the insertion guide body so as to be linearly movable over a certain distance in the front-rear direction; and a pressure inclined block coupled to the outer circumference of the operating rod and having an inclined surface formed thereon to make surface contact with the inclined surface of the clamping block, wherein the clamping block moves along the inclined surface and protrudes or retracts as the pressure inclined block moves linearly in the front-rear direction together with the operating rod while the pressure inclined block and the clamping block are in surface contact through the inclined surface. Claim 7 In claim 6, the clamping operating module is formed such that the clamping block protrudes when the operating rod moves backward from a reference position and the clamping block is retracted when the operating rod moves back to a reference position, and the operating rod is a roll weight transfer device that moves backward by being pressed by the push moving body when the push moving body moves backward. Claim 8 A roll weight transfer device according to claim 7, wherein the clamping operating module further comprises a first spring disposed at the rear end of the operating rod and applying an elastic force in the forward direction to the operating rod, and the operating rod returns to a reference position by the elastic force of the first spring in a reverse moving state. Claim 9 In claim 8, the clamping operating module further comprises a rod connecting body coupled to the rear end of the operating rod and moving together with the operating rod, with both ends exposed to the outside of the insertion guide body, and the push moving body is coupled to a pressure plate movably in the forward and backward directions to engage with the rod connecting body and press the rod connecting body in the backward direction when the push moving body moves backward, and the pressure plate is elastically supported in the backward direction through a separate second spring.

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