JP2011189960A - Binding tool for layered product, method for binding and releasing layered product, and device for releasing binding of layered product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate compressing and binding a layered product, and facilitate releasing the layered product. <P>SOLUTION: A binding tool 1a is used to bind the layered product 20 by pressure compression, or release the layered product. The binding tool includes: two fixed plates (3f and 3r) facing at both longitudinal ends on a base seat 2; two movable moving plates (5f and 5r) moving back and forth between the two fixed plates while the moving plates are facing; a bolt 6 reaching the front face of the front moving plate by penetrating the front fixed plate from the front side; a nut 7 threadedly engaged with the bolt between the front fixed plate and moving plate; a shaft 8 reaching the back face of the back moving plate though the back fixed plate from the back side; a slit 9 penetrating the shaft 8 transversely and extending longitudinally; a wedge hole 11 opening upward in the back fixed plate and extending downward; and a wedge 10 driven into the wedge hole 11 from above. A front end face 9f of the slit 9 which is a friction surface with the wedge 10, moves the back moving plate 5f relative to a base seat to a predetermined relative position via the shaft 8, when the wedge 10 is driven into a predetermined depth. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a restraint for restraining a laminated body compressed by a strong load, and then releasing the load and holding it in a restrained state, and a restraint release method (a restraint / restraint release method). The present invention also relates to a restraining jig for restraining and releasing the laminate and an apparatus mainly intended for releasing the restraint.

  In the process of manufacturing a specific industrial product, a large load is applied to the laminate formed by laminating a large number of flat parts (workpieces) in the front-rear direction and the laminate is compressed in the front-rear direction. There is a step of restraining the laminated body in a compressed state and transferring it to a subsequent step. For example, Patent Document 1 below describes a method for forming a known fuel cell stack as a laminate and holding the fuel cell stack in a compressed state.

  The above-described series of processes of compression, restraint, and release of restraint (hereinafter referred to as restraint / release process) is a process for assembling a large-capacity secondary battery mounted on a hybrid vehicle (HV) or the like. Has been applied. For example, when a well-known nickel metal hydride battery or a secondary battery such as a lithium ion battery is mounted on the HV, a large number of single batteries called cells each having a flat shape are laminated on the front and back to form a laminated body. The body is compressed and restrained, and then the cells are connected to form an assembled battery.

  In general, inside a cell, a set of battery elements in which a sheet-like positive electrode and a negative electrode are arranged to face each other via a separator are stacked in layers, and the layered electrode group together with an electrolyte It has a structure enclosed in a flat case at the front and back. And a cell expand | swells in the lamination direction (front-back direction) of an electrode with the chemical reaction by charging / discharging. A battery is in the form of a stacked body in which cells are stacked. The battery can be held for a certain period of time in a state of being restrained with a strong force in the stacking direction so that a stable charge / discharge reaction can be performed, or the characteristics of the battery can be evaluated in that state of restraint. And so on.

  By the way, a dedicated jig (hereinafter referred to as a restraining jig) is usually used in such a process of restraining / releasing the laminated body. As a restraint jig for the laminated body, there is also one using a lock nut 7 as shown in FIG. When the front-rear direction is defined as shown in this figure, the restraining jig 1b has two fixing plates arranged so as to face the front and rear on the base 2 with the surface of the plate-like base 2 as a horizontal plane. (3f, 3r) and a movable plate 5 that is guided by the guide 4 between the two fixed plates (3f, 3r) and can move back and forth, and extends forward from the front surface of the movable plate 5, A bolt 6 that passes through the front fixing plate 3f and a lock nut 7 that is screwed into the bolt 6 between the fixing plate 3f through which the bolt 6 passes and the moving plate 5 are provided.

  In the compression / restraint step using the restraining jig 1b, the laminate 20 is disposed between the movable plate 5 and the rear fixed plate 3r, and the rear surface of the rear fixed plate 3r is brought into contact with a wall surface or the like. deep. Further, the lock nut 7 is loosened and moved to the moving plate 5 side. And using the hydraulic cylinder etc., the front-end | tip 6f of the volt | bolt 6 is pressed back until it compresses in the state which applied the predetermined pressure to the laminated body 20. FIG. When the laminate 20 is compressed with a predetermined pressure, the lock nut 7 is tightened and moved forward, and brought into contact with the rear surface of the front fixing plate 3f. Thereby, the laminated body 20 is restrained in a compressed state with a predetermined pressure.

  The laminated body 20 is held for a predetermined time in a state of being restrained by a predetermined pressure, or is transferred to a subsequent process such as a performance evaluation test thereafter in a state compressed by the predetermined pressure. Therefore, the restraining jig 1b is stored or transported in a state restrained by a predetermined pressure. Moreover, it attaches to facilities, such as an evaluation test apparatus, with a restraint jig | tool.

  After the post-process is completed, the laminate 20 is taken out from the restraining jig, so that the restraint is released by releasing the pressure. In general, prior to releasing the restraint, a band made of metal or the like is bridged in the front-rear direction of the laminate 20 in order to keep the longitudinal length of the laminate 20 after removal at a predetermined length, and a product (HV, etc.) Ensure the dimensional accuracy when assembled into the. That is, when the laminated body 20 released from the compressed state expands, it is fixed so as to have a predetermined length. Thus, after fixing the laminated body 20 with a band, the lock nut 7 is loosened and the laminated body 20 is taken out from the restraining jig 1b.

  Patent Document 2 below describes a restraining jig that compresses a laminated body using a wedge. A wedge is driven between the upper surface of the laminated body under a load and the fixed plate to maintain the compressed state, and the wedge is removed to release the restrained state. The techniques related to the method for restraining / releasing the laminate are also described in the following Patent Documents 3, 4, and 5.

JP 2006-108058 A JP 2003-234119 A JP 2005-005167 A JP 2001-068081 A Japanese Patent Laid-Open No. 06-108151

  In the restraining / releasing method described above, the laminated body needs to be compressed with an accurate pressure so that the required performance can be exhibited and each workpiece is not damaged, and the compressed state must be maintained. However, in the method using the wedge described in the above cited reference 1 or the method using the restraining jig shown in FIG. 6, when the wedge is pulled out or the lock nut is loosened, the compression force is released. The laminated body to which a strong compressive force is applied tends to expand in the laminating direction with a very strong force. At least the force to expand is maintained until the laminate reaches the length of the band. For this reason, it is necessary to apply a strong impact to the tip of the wedge many times and pull it out, or to apply a very large torque to the lock nut and loosen it. This increases the time required for the process of restraining / releasing the laminated body, and requires a great deal of labor. Further, when the restraint state is released, the contact surface between the wedge and the restraining jig and the seat surface where the lock nut comes into contact with the front fixing plate may be worn, which increases the time and cost for maintenance of the restraining jig. . If the wear is severe, the restraining jig itself is replaced. If the workpiece is a battery, there is a possibility that a failure such as a short circuit may occur due to metal powder generated by wear, and this may cause a reduction in the yield of the laminate as a product. Longer time of the process of restraining / releasing the laminated body, an increase in maintenance cost of the restraining jig, or a decrease in the yield of the laminated body results in an increase in the cost of the industrial product in which the laminated body is incorporated.

  Furthermore, when the laminated body in a restrained state is attached to the facility in the subsequent process together with the restraining jig, the laminated body needs to be restrained at a correct relative position with respect to the restraining jig. In the restraining jig shown in FIG. 6 and the restraining jig described in Patent Document 1, the fixed plate is used as a positioning reference. For this reason, the fixing plate needs to be strong so as not to be warped or distorted when pressed. Therefore, the fixing plate is made of a thick and strong material, and it is naturally difficult to reduce the weight. If the weight of the restraining jig increases, it will hinder the transportation work and the attachment to various devices in the subsequent process. And the restraint / restraint release method of the laminate using the restraint jig shown in FIG. 6 and the technique of the above-mentioned Patent Document 1 solve the various problems related to restraint and release of the laminate as described above. I can't. Of course, the same applies to the techniques described in Patent Documents 3 to 5.

  Therefore, the present invention can reliably compress and restrain the laminated body with an appropriate pressure, can easily release the pressure of the laminated body in the compressed state, and also has workability when handling the laminated body in the restricted state. Laminate restraint jig that can be improved, stack restraint / restraint method using the jig, and mainly releasing the restraint of the laminate based on the method while using the jig Another object is to provide a device.

The invention relating to a restraint jig for a laminate for achieving the above object is to laminate a laminate obtained by laminating a number of workpieces in the front-rear direction and compressing it in the front-rear direction at a predetermined pressure while maintaining the pressure. A restraining jig for restraining the body and releasing the restraint by releasing the pressure of the laminated body in the restraining state,
A front fixing plate and a rear fixing plate which are erected on a pedestal having a horizontal surface in the front-rear direction;
A front moving plate and a rear moving plate that are movable in the front-rear direction between the front fixed plate and the rear fixed plate while facing the front-rear direction;
A bolt extending forward from the front surface of the front moving plate and penetrating the front fixed plate;
A lock nut screwed into the bolt between the front fixed plate and the front moving plate;
A shaft extending rearward from the rear surface of the rearward moving plate and penetrating the rearward fixed plate;
A wedge hole that opens in the upper surface of the rear fixing plate while vertically traversing a hole for penetrating the shaft drilled in the rear fixing plate;
A wedge driven into the wedge hole from above the rear fixed plate, with the bottom as a tip;
A slit extending vertically while penetrating the shaft up and down;
The front end surface of the slit is a friction surface with the wedge, and the friction surface and the wedge bias the shaft forward when the wedge is driven to a predetermined depth, and the rearward moving plate Is moved to a predetermined relative position with respect to the pedestal,
It is characterized by that.

The restraint jig is used to compress the laminate in the front-rear direction at a predetermined pressure and restrain the laminate on the restraint jig while maintaining the pressure, and the restraint state is in the restraint state. The restraint / restraint release method of the laminate including the restraint release process of releasing the restraint by releasing the pressure of the laminate is also within the scope of the present invention.
The restraint process is
A laminate arrangement step of arranging a laminate between the front moving plate and the rear moving plate;
After restricting the rearward movement of the rear moving plate in a state where the wedge is driven to the predetermined depth, the front end of the bolt is pressed rearward with a predetermined pressure from the outside, and the two moving plates are applied to the two moving plates. A compression step of compressing the sandwiched laminate;
A nut fastening step for tightening the lock nut and bringing it into contact with a front fixed plate to fix the position of the front moving plate;
A pressure release step for releasing the external pressure;
Including
The debinding process is
A pressurizing force that presses the front end of the bolt backward with a predetermined pressure while bringing the rear end of the shaft into contact with the backup wall surface in a state where the laminated body is restrained on the restraining jig by the restraining process. Steps,
A wedge releasing step of pulling out the wedge during the pressurizing step;
A pressure release step of moving the restraining jig forward while releasing the pressure applied by the pressurizing step;
A nut loosening step for loosening the lock nut;
It is characterized by including.

Also, in the method for restraining / releasing the laminate,
In the compression step,
With the rear end of the shaft abutting against the backup wall surface, the front end of the bolt is directed rearward and a predetermined pressure is applied to compress the laminate sandwiched between the front moving plate and the rear moving plate. A first step to:
A second step of inserting the wedge into the wedge hole to a predetermined depth during execution of the first step;
By moving the restraining jig forward, the laminated body is relatively moved rearward with respect to the fixed plate, the slit front end is brought into contact with the front end of the wedge, and the rear surface of the laminated body is on the restraining jig. A third step of adjusting to match the predetermined position of
It is good also as performing.

Alternatively, the restraint process can be
A laminate arrangement step of arranging a laminate between the front moving plate and the rear moving plate;
After the wedge is driven to the predetermined depth, the rearward movement plate is restricted from moving backward, and the front end of the bolt is applied from the outside toward the rear to apply the predetermined pressure to move the two sheets. A compression step of compressing the laminate sandwiched between plates;
A nut fastening step for tightening the lock nut and bringing it into contact with a front fixed plate to fix the position of the front moving plate;
A pressure release step for releasing the external pressure;
Including
The debinding process is
A jig fixing step of fixing the restraint jig at a predetermined position with the restraint jig being aligned with respect to the pedestal in a state where the laminate is restrained on the restraint jig by the restraint process;
The pressure buffer shaft is brought into contact with the rear end of the pressure buffer shaft that is movable back and forth with the front end of the bolt while the front end of the pressure shaft that is moved back and forth by the pressurizing mechanism is brought into contact with the rear end of the shaft. A pressurizing step of applying a predetermined pressure forward to the rear end of the shaft via the pressurizing shaft that moves forward by the pressurizing mechanism in a fixed state;
A wedge releasing step of pulling out the wedge during the pressurizing step;
Release the pressure so that the bolt can be moved forward via the front moving plate by releasing the pressure buffer shaft fixed state while releasing the pressure in the pressurizing step with the lock nut loosened. Steps,
It can also be set as the method of restraining / releasing the laminated body characterized by including.

The restraint release device for executing the restraint release process is also within the scope of the present invention,
A pedestal that can be moved back and forth while supporting the restraining jig from below while being aligned with respect to the base,
A backup wall surface disposed behind the mount and contacting the rear end of the shaft by moving the mount backward;
A pressurizing mechanism for pressing the bolt tip backward with a predetermined pressure;
It has.

Other inventions related to the restraint releasing device
A base that fixes the restraining jig at a predetermined position with respect to the base, and a rear end of the restraining jig that is installed at the rear of the base and is fixed to the base is pressed forward with a predetermined pressure. A pressure mechanism and a backup mechanism,
The backup mechanism includes a wall having a backup shaft extending in the front-rear direction, a through hole of the backup shaft, a wedge hole that opens upward and crosses the through hole up and down, and is driven into the wedge hole. A backup wedge connected to the upper end of the backup wedge, a wedge insertion / extraction mechanism for moving the wedge up and down, and a backup shaft drive connected to the front end of the backup shaft for moving the backup shaft back and forth With
The backup shaft is formed with a slit into which the tip of the backup wedge is inserted. The slit has a front end surface as a friction surface with the backup wedge, and when the backup wedge is driven, the shaft is moved forward. And is configured to regulate forward movement of the backup shaft,
It is characterized by that.

In other inventions related to the restraint release device,
The pressurizing mechanism includes a link mechanism composed of two link members connected so as to form an open V shape, and a lower end while pivotally supporting the top of the V shape of the link mechanism at the upper end. An output shaft extending in the direction, a pressure drive unit that presses the output shaft upward, a slider that extends in the front-rear direction and whose rear end is connected to the upper front end of the V-shape of the link mechanism, and the link A support member for restricting the upper end of the V-shape of the mechanism to open and close horizontally in the front-rear direction;
The pressure drive unit moves the slider forward via the link member in front by pressing the output shaft upward, and the link mechanism is in a V shape at a predetermined angle. When fixed, the front end of the slider may be installed so as to contact the rear end of the shaft of the restraining jig.

  In any one of the above-described restraint releasing devices for the laminated body, a wedge removing mechanism for vertically moving a pin insertable into the wedge hole of the restraining jig so as to be freely inserted and removed from below may be provided.

  According to the method for restraining / releasing the laminate according to the present invention, the laminate can be reliably compressed and restrained with an appropriate pressure while the laminate is positioned, and the pressure of the laminate in the restrained state can be easily released. Moreover, the jig used for the said method can anticipate weight reduction. It is possible to improve workability related to the restraint of the laminated body and the release of the restraint.

It is a schematic structure figure of a restraining jig concerning an embodiment of the present invention. It is a figure which shows the restraint procedure in the restraint / restraint releasing method of the laminated body in 1st Example of this invention. It is a figure which shows the restraint cancellation | release procedure in the restraint / restraint releasing method of the laminated body in 1st Example of this invention. It is a schematic block diagram of the restraint releasing apparatus used for the restraint and restraint releasing method of the laminated body in the 2nd Example of this invention. It is a figure which shows the outline of the restraint / restraint releasing method of the laminated body in the 2nd Example of this invention. It is a figure which shows the structure of the restraining jig | tool which concerns on the prior art example of this invention.

=== Embodiment of the Invention ===
As an example of the present invention, a cell body that is a single secondary battery, such as a cell that is flat in the front-rear direction and laminated with a large number of workpieces that can be compressed / expanded in that direction in the front-rear direction, with a strong and predetermined pressure A method for restraining / releasing a laminate including a restraining procedure for restraining the laminate in the compressed state after compression in the front-rear direction and a restraint releasing procedure for allowing the laminate in the restrained state to be taken out will be described. In addition, a restraining jig or apparatus used in the method of this example is an embodiment of the present invention.

  In the restraint / restraint release method according to the embodiment of the present invention, the restraint procedure in which the restraint position can be freely changed with respect to the restraining jig while the laminate is in the compressed state, and the restraint laminate And a restraint releasing procedure in which the restraint can be easily released by loosening the wedge and the lock nut in a state where the pressure is applied using the pressurizing mechanism in the restraining procedure. In addition, the restraining jig according to the embodiment of the present invention absorbs the tolerance of the entire length of the laminated body during compression when releasing the restraint under such a pressure, and the laminated body is correctly relative to the jig. The device is constrained by position.

=== Structure of restraining jig ===
FIG. 1 shows a schematic structure of a restraining jig (hereinafter, jig) 1a according to an embodiment of the present invention. (A) is a top view from the top, (B) is an aa arrow directional cross-sectional view in (A). Further, (C) is an enlarged view of a main part indicated by a circle 110 in (B). The jig 1a is located between two front and rear fixing plates (front fixing plate 3f and rear fixing plate 3r) fixed facing each other on a pedestal having a horizontal surface, and the two fixing plates (3f and 3r). Two moving plates (front moving plate 5f and rear moving plate 5r) that can move back and forth while facing forward and backward are provided. The front of the jig 1a has substantially the same structure as the restraint / release mechanism by the lock nut 7 shown in FIG. 6, and guides the guide 4 extending in the front-rear direction on the left and right sides of the jig 1a through a mechanism such as a ball bush. The front moving plate 5f, the bolt 6 extending forward from the front surface of the front moving plate 5f and penetrating the front fixing plate 3f, and the bolt 6 between the front moving plate 5f and the front fixing plate 3f The lock nut 7 is provided.

  As illustrated, the jig 1a includes moving plates (5f, 5r) at the front and rear, and a shaft 8 extends rearward from the rear surface of the rear moving plate 5r. The front end of the shaft 8 may be in contact with the rear surface of the rearward moving plate 5r so as to be able to be separated, or may be erected and fixed. The rear end 8r of the shaft 8 protrudes rearward through a through hole formed in the rear fixing plate 3r.

  The shaft 8 is formed with a slit 9 that penetrates in the vertical direction and extends in the front-rear direction. The rear fixing plate 3r is provided with an insertion hole 11 for the wedge 10 so as to cross the through hole of the shaft 8 up and down. Thereby, in a state where the wedge 10 is inserted into the hole 11 from above, the inclined surface of the wedge 10 abuts against the front end 9 f of the slit 9. When the wedge 10 is pulled out, the shaft 8 can move rearward. In addition, the laminated body 20 on the jig 1b needs to be constrained in a state where at least the front surface or the rear surface is in an accurate relative positional relationship with respect to the reference position. For this purpose, a positioning hole 12 is formed in the base 2 of the jig 1a.

  In the jig 1a according to the present embodiment, when the wedge 10 is driven to a predetermined position, the shaft 8 moves forward to the predetermined position. That is, the position of the rear moving plate 5r can be fixed with respect to the pedestal 2 by the depth to which the wedge 10 is driven.

=== Constraining the laminate ===
In the Example of this invention, if the laminated body 20 is restrained in the predetermined position with respect to the base 2, the restraining method will not ask | require. As a method for restraining the stacked body 20 using the jig 1a according to the embodiment, the rear surface of the stacked body 20 is aligned with the wedge 10 driven to a predetermined depth, and the rear fixing plate With 3r in contact with a wall surface called backup, pressure is applied backward from the head 6f of the front bolt 6 using a hydraulic cylinder or the like. Then, the lock nut 7 is tightened with the hydraulic cylinder or the like held at a predetermined pressure. That is, the lock nut 7 is turned and brought into contact with the rear surface of the front fixing plate 3f. Thereby, the distance between the front and rear moving plates (5f, 5r) is fixed. This distance corresponds to a predetermined pressure. Finally, the pressure applied is released. The laminated body 20 is in a state of being restrained by a predetermined pressure by fixing the front-rear distance of the front and rear moving plates (5f, 5r) by the rear wedge 10 and the front lock nut 7. Further, the rear surface of the laminate 20 is fixed at a predetermined position with respect to the pedestal 2 by the driving depth of the previous wedge 10, and the alignment hole 12 drilled in the pedestal 2 is used as a reference in the subsequent process. Thus, the laminated body 20 is attached to the apparatus or the like in a predetermined positional relationship.

=== First Embodiment ===
FIG. 2 shows an outline of a method for restraining / releasing the laminate 20 using the jig 1a according to the embodiment of the present invention shown in FIG. 1 as a first example of the present invention. In FIG. 2, the laminated body 20 in a restrained state on the jig 1 a is restrained in a state where the laminated body 20 is positioned with respect to the pedestal 2 using the device 100 a for releasing the restraint, or the restraint is released. The procedures to do are shown in (A) to (E).

  The restraint releasing device 100a shown in FIG. 2 includes an output shaft 42 that is moved back and forth by a hydraulic cylinder 41, and pressurizes pressure from the head 6f of the front bolt 6 in the jig 1a toward the rear. The mechanism 40a, a wall surface (backup) 30a for receiving the pressure behind the jig 1a, and a base 50a for positioning the base 2 and fixing the jig 1a. The gantry 50b includes a pallet 52 that supports the pedestal 2 from below and an air cylinder 51 that adjusts the vertical position of the pallet 52 so that the vertical position of the output shaft 42 of the pressurizing mechanism 40a coincides by moving the pallet up and down. A linear guide 53 that supports the lower part is included. Further, an upward pin projects from a predetermined position on the upper surface of the pallet 52, and this pin engages with the positioning hole 12 of the base 2. Further, the gantry 50a includes a mechanism for moving the whole back and forth. As a result, the base 50a engages the pin on the pallet 52 with the positioning hole 12 of the base 2, thereby fixing the relative positional relationship between the base 2 and the base 2 and maintaining the relative position while maintaining the relative position. The entire tool 1a can be moved back and forth.

  When the laminated body 20 is compressed using the restraint releasing device 100a having the above-described configuration and structure, the wedge 10 is inserted into the wedge hole 11, and the rear of the head 6f of the bolt 6 in front of the jig 1a. Apply pressure toward At this time, the gantry 50a is moved rearward to bring the rear end of the shaft 8 of the jig 1b into contact with the backup 30a (A). Next, in this state, the rear end of the output shaft 42 of the hydraulic cylinder 41 is brought into contact with the front end 6f of the bolt 6 to pressurize backward. Here, if the pedestal 2 that does not move back and forth and the two front and rear fixed plates (3f, 3r) are the jig body, only the two front and rear moving plates (5f, 5r) are shortened by the applied pressure. The laminate 20 is moved relative to the jig main body, and the laminate 20 sandwiched between the two moving plates (5f, 5r) is compressed (B). Note that a load cell 43 is provided on the output shaft 42 of the hydraulic cylinder 41, and the pressure is monitored by the load cell 43 and pressurized to a predetermined pressure. When the predetermined pressure is reached, the metal band 80 is bridged over the laminate 20 (C). The relative movement of the shaft 8 is stopped by the wedge 10 in the course of moving the gantry 50a forward together with the jig body. That is, the rear moving plate 5r stops at a predetermined position. When the lock nut 7 is tightened in this state, the stacked body 20 is restrained by a predetermined pressure (D). When the pressure of the hydraulic cylinder 41 is released, the jig 1b can be transported (E).

  Thus, the jig 1a according to the present embodiment has a structure in which the stacked body 20 is compressed between the two moving plates (5f, 5r) operating in the front-rear direction, and the moving plate (5f, 5r) Since the laminated body 20 in a restrained state can be relatively moved back and forth with respect to the jig body while being sandwiched between the two movable plates (5f, 5r) even if the body itself is warped, The rear surface can be adjusted to the reference position after compression. Therefore, it is not necessary to use a thick and sturdy member for the fixing plate (3f, 3r) or the like, and the weight of the jig 1a can be expected.

  On the other hand, in the restraint release procedure, as shown in FIGS. 3A to 3C, a pressure about the time of restraint is applied to the laminated body 20 in the restrained state (A), and the wedge 10 is moved in that state. Unplug (B). However, when the wedge 10 is pulled out to release the restrained state, if the front surface of the backup 30a is in contact with the rear end 8r of the shaft 8, even if the pressure of the hydraulic cylinder 40 is released, the stacked body 20 expands. The laminate 20 cannot be taken out. Therefore, after the wedge 10 is removed, in the process of releasing the pressure of the hydraulic cylinder 41, the gantry 50a is moved forward and the jig body is moved forward (C). Eventually, the laminated body 20 fixed by the band 80 may be taken out by loosening the lock nut 7. The wedge 10 may be manually pulled out from below using a hammer or the like, but an air cylinder having an output shaft that moves up and down is used, and the tip of the output shaft is connected to the wedge hole 11 from below the rear fixing plate 3r. You may make it insert in.

=== Second Embodiment ===
In the first embodiment, a special base 50a that can move back and forth is required, and the configuration of the restraint releasing device 100a is likely to be complicated and expensive. Therefore, in the second example, a restraint / restraint releasing method that can release restraint of the stacked body 20 with a simpler apparatus configuration while using the jig 1a according to the present embodiment.

  FIG. 4 shows an outline of a restraint releasing device 100b used for releasing the restraint in the restraint / restraint releasing method according to the second embodiment. The device 100b is a device 100b that releases the stacked body 20 that is already in a restrained state on the jig 1a, and is used for the purpose of restraining the stacked body 20 like the restraint releasing device 100a in the first embodiment. Absent. That is, the method for restraining the stacked body 20 is not particularly limited. Therefore, only the procedure for releasing the constraint will be described for the constraint / restraint releasing method in the second embodiment.

  The restraint release device 100b used in the second embodiment is similar to the restraint release device 100a in the first embodiment in order to fix the pressurizing mechanism 40b, the backup 30b, and the jig 1a of the laminate 20. The gantry 50b. However, the gantry 50b does not need a mechanism for moving back and forth, and may have a configuration that can fix the jig body to the ground. Further, in the restraint releasing device 100b illustrated here, a pin (wedge removal pin) 54 inserted from below into the wedge hole 11 of the jig 1a and the pin 54 are moved up and down to disengage the wedge removal pin 54 from the wedge. An air cylinder 55 for inserting into and removing from the hole 11 is also provided.

  The biggest difference between the first embodiment and the second embodiment is that the pressurization mechanism (40a, 40b) and the backup (30a, 30b) have a front-rear relationship, and the backup 30b for releasing the constraint according to the front-rear relationship. It is in the configuration. Specifically, in the second embodiment, the backup 30b is disposed in front of the jig 1a, and the pressurizing mechanism 40b is disposed in the rear. The backup 30b is mainly composed of a damper 70 having an output shaft 71 that moves back and forth, not a wall surface. Here, an air cylinder 70 is used as a damper. Further, an output shaft (hereinafter referred to as a backup shaft) 71 of the air cylinder 70 passes through a wall body 72 standing in front of the bolt 6, and a rear end protrudes rearward of the wall body 72. Further, the backup shaft 71 is formed with slits extending back and forth like the shaft 8 of the jig 1a, and the wall body 71 has a hole 73 into which a wedge (backup wedge) 74 is driven downward from above. The lower end of the backup wedge 74 that is drilled and driven into the hole 73 is inserted into the slit of the backup shaft 71.

  A pressurizing mechanism 40b is installed behind the jig 1b. The pressurizing mechanism 40b according to the second embodiment includes an air cylinder 60 having an output shaft 61 that moves up and down, and a V-shaped link mechanism 63 that is connected to the upper end 62 of the output shaft 61 and that opens and closes forward and backward. It is mainly composed. The front link member 63f of the two link members (63f, 63r) connected in a V shape constituting the link mechanism 63 is connected to the rear end of a columnar slider 66 extending forward and backward. ing. The rear link member 63r has a rear end pivotally supported with respect to a support member (rear support member) 64r disposed rearward with respect to the left-right direction, that is, the depth (or front) direction in FIG. Has been. The slider 66 is supported by a hole drilled at a predetermined height in another support member (front support member) 64f disposed in front so as to face the rear support member 64r. Move forward and backward. Therefore, the pressurizing mechanism 40 b constitutes a toggle mechanism that moves the slider back and forth via the V-shaped link mechanism 63 by moving the output shaft 61 of the air cylinder 60 up and down.

  Then, when releasing the restraint of the stacked body 20 using the restraint releasing device 100b, first, the jig body is placed on the pallet 52 of the gantry 50b as in the procedure shown in FIGS. The jig body is placed in a state of being positioned above, and the jig body is fixed at a predetermined position (A). At this time, the front end position of the front end 6f of the bolt 6 moves back and forth according to the front-rear length of the stacked body 20 in a restrained state. The backup wedge 74 is driven in a state where the air cylinder 70 of the backup 30b is in contact with the bolt front end 6f of the jig 1b, the position of the bolt front end 6f is fixed, and the rear end 8r of the shaft 8 is pressurized. The front end of the slider 66 of the mechanism 40b is brought into contact (B). At this time, the V-shaped angle α in the link mechanism 63 is fixed (B). Thereby, the shaft 8 is prohibited from moving backward. Moreover, it will be in the state which applied to the laminated body 20 without the pressure at the time of restraint being excessive and insufficient.

  Thus, in a state where the pressure applied to the laminate 20 is kept constant, the wedge 10 and the lock nut 7 of the jig 1a can be easily pulled out or loosened. When the wedge 10 is first pulled out (C) and then the pressure applied by the pressurizing mechanism is released, the shaft moves rearward through the rear moving plate due to the pressure of the laminated body, and the pressure of the laminated body is released (D). . The backup wedge can also be easily pulled out, the output shaft of the air cylinder connected to the upper end of the backup wedge is moved upward, the backup wedge is pulled out, the restraint release device returns to the initial state, and the restraint The release procedure ends (E).

  In the second embodiment, a hydraulic cylinder or the like may be used as the pressurizing mechanism 40b in the restraint releasing device 100b, instead of the toggle mechanism described above, like the restraint releasing device 100a in the first embodiment. However, it is difficult to reduce the weight and size of hydraulic cylinders. Therefore, in the second embodiment, the air cylinder and the toggle mechanism are used to reduce the size and weight of the apparatus.

  The present invention is applicable to, for example, a process of manufacturing an assembled battery (stack) by stacking a large number of secondary battery cells in a compressed state with a strong pressure, a stack inspection process, and the like.

1a, 1b Restraining jig 2 Pedestal 3f, 3r Fixed plate 5f, 5r Moving plate 6 Bolt 7 Lock nut 8 Shaft 10 Restraining tool wedge 11 Restraining tool wedge 20 Laminate 30a, 30b Backup 40a, 40b Pressurization Mechanism 50a, 50b Base 51, 53 Base air cylinder 52 Palette 54 Wedge removal pin 60 Pressure mechanism air cylinder 63 Link mechanism 66 Slider 70 Backup air cylinder 71 Backup shaft 72 Wall body 73 Wall wedge hole 74 Backup wedge 75 Air cylinder for backup wedge 100a, 100b Restraint release device

Claims (8)

A laminate formed by laminating a number of workpieces in the front-rear direction is compressed in the front-rear direction at a predetermined pressure to restrain the laminate while maintaining the pressure, and release the pressure of the laminate in the restrained state. A restraining jig for releasing the restraint,
A front fixing plate and a rear fixing plate which are erected on a pedestal having a horizontal surface in the front-rear direction;
A front moving plate and a rear moving plate that are movable in the front-rear direction between the front fixed plate and the rear fixed plate while facing the front-rear direction;
A bolt extending forward from the front surface of the front moving plate and penetrating the front fixed plate;
A lock nut screwed into the bolt between the front fixed plate and the front moving plate;
A shaft extending rearward from the rear surface of the rearward moving plate and penetrating the rearward fixed plate;
A wedge hole that opens in the upper surface of the rear fixing plate while vertically traversing a hole for penetrating the shaft drilled in the rear fixing plate;
A wedge driven into the wedge hole from above the rear fixed plate, with the bottom as a tip;
A slit extending vertically while penetrating the shaft up and down;
The front end surface of the slit is a friction surface with the wedge, and the friction surface and the wedge bias the shaft forward when the wedge is driven to a predetermined depth, and the rearward moving plate Is moved to a predetermined relative position with respect to the pedestal,
A laminate restraining jig characterized by the above. A restraining process for compressing the laminate in the front-rear direction at a predetermined pressure using the restraining jig according to claim 1, and restraining the laminate on the restraining jig while maintaining the pressure, A restraint / restraint release method for a laminate including a restraint release process for releasing the restraint by releasing the pressure of the laminate in a restrained state,
The restraint process is
A laminate arrangement step of arranging a laminate between the front moving plate and the rear moving plate;
After restricting the rearward movement of the rear moving plate in a state where the wedge is driven to the predetermined depth, the front end of the bolt is pressed rearward with a predetermined pressure from the outside, and the two moving plates are applied to the two moving plates. A compression step of compressing the sandwiched laminate;
A nut fastening step for tightening the lock nut and bringing it into contact with a front fixed plate to fix the position of the front moving plate;
A pressure release step for releasing the external pressure;
Including
The debinding process is
A pressurizing force that presses the front end of the bolt backward with a predetermined pressure while bringing the rear end of the shaft into contact with the backup wall surface in a state where the laminated body is restrained on the restraining jig by the restraining process. Steps,
A wedge releasing step of pulling out the wedge during the pressurizing step;
A pressure release step of moving the restraining jig forward while releasing the pressure applied by the pressurizing step;
A nut loosening step for loosening the lock nut;
A method for restraining / releasing a laminate, comprising: In claim 2,
In the compression step,
With the rear end of the shaft abutting against the backup wall surface, the front end of the bolt is directed rearward and a predetermined pressure is applied to compress the laminate sandwiched between the front moving plate and the rear moving plate. A first step to:
A second step of inserting the wedge into the wedge hole to a predetermined depth during execution of the first step;
By moving the restraining jig forward, the laminated body is relatively moved rearward with respect to the fixed plate, the slit front end is brought into contact with the front end of the wedge, and the rear surface of the laminated body is on the restraining jig. A third step of adjusting to match the predetermined position of
A method of restraining / releasing the laminate, characterized in that A restraining process for compressing the laminate in the front-rear direction at a predetermined pressure using the restraining jig according to claim 1, and restraining the laminate on the restraining jig while maintaining the pressure, A restraint / restraint release method for a laminate including a restraint release process for releasing the restraint by releasing the pressure of the laminate in a restrained state,
The restraint process is
A laminate arrangement step of arranging a laminate between the front moving plate and the rear moving plate;
After the wedge is driven to the predetermined depth, the rearward movement plate is restricted from moving backward, and the front end of the bolt is applied from the outside toward the rear to apply the predetermined pressure to move the two sheets. A compression step of compressing the laminate sandwiched between plates;
A nut fastening step for tightening the lock nut and bringing it into contact with a front fixed plate to fix the position of the front moving plate;
A pressure release step for releasing the external pressure;
Including
The debinding process is
A jig fixing step of fixing the restraint jig at a predetermined position with the restraint jig being aligned with respect to the pedestal in a state where the laminate is restrained on the restraint jig by the restraint process;
The pressure buffer shaft is brought into contact with the rear end of the pressure buffer shaft that is movable back and forth with the front end of the bolt while the front end of the pressure shaft that is moved back and forth by the pressurizing mechanism is brought into contact with the rear end of the shaft. A pressurizing step of applying a predetermined pressure forward to the rear end of the shaft via the pressurizing shaft that moves forward by the pressurizing mechanism in a fixed state;
A wedge releasing step of pulling out the wedge during the pressurizing step;
Release the pressure so that the bolt can be moved forward via the front moving plate by releasing the pressure buffer shaft fixed state while releasing the pressure in the pressurizing step with the lock nut loosened. Steps,
A method for restraining / releasing a laminate, comprising: A restraint release device for performing the restraint release process according to claim 2,
A pedestal that can be moved back and forth while supporting the restraining jig from below while being aligned with respect to the base,
A backup wall surface disposed behind the mount and contacting the rear end of the shaft by moving the mount backward;
A pressurizing mechanism for pressing the bolt tip backward with a predetermined pressure;
A restraint releasing device for a laminate, comprising: It is a laminated body restraint cancellation | release apparatus for performing the said restraint cancellation | release step of Claim 4,
A base that fixes the restraining jig at a predetermined position with respect to the base, and a rear end of the restraining jig that is installed at the rear of the base and is fixed to the base is pressed forward with a predetermined pressure. A pressure mechanism and a backup mechanism,
The backup mechanism includes a wall having a backup shaft extending in the front-rear direction, a through hole of the backup shaft, a wedge hole that opens upward and crosses the through hole up and down, and is driven into the wedge hole. A backup wedge connected to the upper end of the backup wedge, a wedge insertion / extraction mechanism for moving the wedge up and down, and a backup shaft drive connected to the front end of the backup shaft for moving the backup shaft back and forth With
The backup shaft is formed with a slit into which the tip of the backup wedge is inserted. The slit has a front end surface as a friction surface with the backup wedge, and when the backup wedge is driven, the shaft is moved forward. And is configured to regulate forward movement of the backup shaft,
A restraint releasing device for a laminated body. In claim 6,
The pressurizing mechanism includes a link mechanism composed of two link members connected so as to form an open V shape, and a lower end while pivotally supporting the top of the V shape of the link mechanism at the upper end. An output shaft extending in the direction, a pressure drive unit that presses the output shaft upward, a slider that extends in the front-rear direction and whose rear end is connected to the upper front end of the V-shape of the link mechanism, and the link A support member for restricting the upper end of the V-shape of the mechanism to open and close horizontally in the front-rear direction;
The pressure drive unit moves the slider forward via the link member in front by pressing the output shaft upward, and the link mechanism is in a V shape at a predetermined angle. When fixed, the front end of the slider is installed so as to contact the rear end of the shaft of the restraining jig,
A restraint releasing device for a laminated body.   8. A laminate restraint releasing device according to any one of claims 5 to 7, further comprising a wedge removal mechanism for vertically moving a pin that can be inserted into the wedge hole of the restraining jig so that the pin can be inserted and removed from below. .

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