JP3050798B2 - Method of bending member to be bent and bending jig - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for bending a member to be bent and a bending jig, and more particularly to a method for bending a jig provided on a box body and standing upright along an inner surface of an upright wall of the box body. A bent member projecting from the upper opening of the box by a predetermined length is bent from a predetermined portion as a base point, and is held at a predetermined crossing angle with respect to the inner surface of the upright wall to project into the box body. The present invention relates to a bending method of a bending member and a bending jig.

[0002]

2. Description of the Related Art The above-mentioned bent member includes, for example, an output terminal provided on an insulated container and each battery in order to output power from an assembled battery in which a large number of sodium-sulfur batteries are accommodated in an insulated container. There is a connecting member to connect. The connection member is provided in the heat-insulating container, stands up along the inner surface of the upright wall of the container, projects upward from the heat-insulating container by a predetermined length, and, after housing the sodium-sulfur battery, starts from a predetermined position. It is configured to be bent inside the heat insulating container at a predetermined crossing angle and to connect the tip of the bent protrusion to the terminal of the sodium-sulfur battery in the heat insulating container.

[0003]

By the way, in order to ensure that the tip of the bent projection of the connecting member is connected to the terminal of the sodium-sulfur battery housed in the heat insulating container, the connecting member must be predetermined. It must be bent to an exact angle at an accurate angle, with the precise point as a base point and without a large bending point.

However, as a normal means for bending the connection member, means for bending a predetermined portion of the connection member with a jig such as pliers is used, so that the bending base point is not necessarily predetermined. And the shape of the bent protrusion does not match the exact part, and the shape of the bent protrusion does not become an acute angle and the length of the inward protrusion of the bent protrusion is not constant. The actual situation is that the dimensions and the like are corrected with great effort. Accordingly, it is an object of the present invention to address such a problem.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a method of bending a member to be bent and a bending jig typically using the above-mentioned connecting member. A bent member that is provided and rises along the inner surface of the standing wall of the same box and protrudes from the upper opening of the same box by a predetermined length is bent at a predetermined position as a base point, and is bent against the inner surface of the standing wall. A bent lever that holds a protruding end of the bent member by holding a predetermined crossing angle and protruding inward of the box body. And the member to be bent is bent by rotating the member to be bent in an arc centered at the center.

In the bending method, when bending the protruding end of the member to be bent, an arbitrary portion of the protruding end may be simply grasped. The protruding end portion may be gripped so as to support a portion from above along the bending-side surface to a bending base point or near the base point.

In the bending method, for example, the box is a container for accommodating a large number of secondary cells, and the bent member is a connecting member for connecting the cells and an output terminal. . In the bending method, for example, the box is an insulated container, and the unit cell is a sodium-sulfur battery.

Further, the bending jig of the present invention includes a bending member provided in the box, standing up along the inner surface of the upright wall of the box and projecting a predetermined length from the upper opening of the box. A bending jig for a member to be bent, which is bent at a predetermined portion as a base point and projects inward of the box body while maintaining a predetermined crossing angle with respect to the inner surface of the upright wall, wherein the box body A jig body having a clamp mechanism for gripping the upper end of the standing wall, a bending lever having a clamp mechanism for gripping the protruding end of the bent member, and a bending base point of the bent member. And a guide mechanism provided between the jig main body and the bending lever for rotating the bending lever along the guide member. It is.

In the bending jig, the bending lever is located along a surface on the bending side of the protruding end of the bent member and cooperates with the clamp mechanism. Can be configured to include a gripping portion for gripping, and the gripping portion extends downward along the surface on the bending side from above at the projecting end of the member to be bent, or a bending base point, or It can be formed to a length reaching the vicinity of the base point.

The box to be used by the bending jig is, for example, a container for accommodating a large number of secondary cells,
The bent member is a connecting member that connects the cell and the output terminal. Furthermore, the box is, for example, an insulated container, and the secondary cell is a sodium-sulfur battery. In the bending jig, for example, each of the clamp mechanisms is a lateral push toggle clamp.

[0011]

In the bending method of the present invention,
Since the bending lever is rotated in an arc shape about the bending base point of the bent member while gripping the protruding end of the bent member, the bent member is bent. The bent member is bent almost exactly at a predetermined bending base point, and the shape of the bending base point is also an acute angle. For this reason, the size of the bent projecting portion of the bent member is accurate and constant. Such a bending method can be easily implemented by employing the bending jig according to the present invention.

In the bending jig according to the present invention, the jig body is properly attached to the upright wall by the clamping mechanism of the jig, and the projecting end of the bent member is gripped by the clamping mechanism of the bending lever. By the arc-shaped guide member constituting the guide mechanism, the member to be bent can be surely rotated and bent in an arc shape about the bending base point of the bent member. For this reason, the member to be bent is bent almost exactly at a predetermined bending base point, and the shape of the bent portion also becomes an acute angle. Therefore, if the bending angle of the protruding end of the member to be bent is set to a predetermined angle, the dimensions of the bending protruding portion become accurate and constant.

In this case, as a bending jig, a bending lever extends downward from above at the protruding end of the member to be bent along the surface on the bending side to be bent, or in the vicinity of the bent point. The gripping part is provided, and the gripping part adopts a structure configured to grip the protruding end in cooperation with the crimp mechanism,
When bending the protruding end of the member to be bent, the gripping portion of the bending lever is used to hold the protruding end of the member to be bent from above along the surface on the bending side thereof, or the base of the same. If the member is supported up to the vicinity, the protruding end of the member to be bent can be bent more accurately at the bending base point.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1 and 2 show a bending jig according to an example of the present invention. The bending jig 10 is a jig for suitably implementing the bending method of the present invention, and includes a secondary battery shown in FIGS. Each connecting piece of the current collecting plate 24 shown in FIG. 7, which is a connecting member of the assembled battery 20, is a member to be bent.

The secondary battery 20 includes a plurality of cells 21 of a sodium-sulfur battery housed in a heat insulating container 22. The battery terminals 21a and 21b of each cell 21
3a and the connection band 23b are connected in series and / or in parallel. Further, in the secondary assembled battery 20, a current collecting plate 24 is provided upright along the inner surfaces of the opposed standing walls 22a and 22b constituting the heat insulating container 22, and the current collecting plate 24 is shown in FIGS. As shown in FIG. 7, the insulating plates 25a and 25b stand upright on both inner and outer surfaces.

As shown in FIGS. 5 to 7, the current collecting plate 24 includes a flat plate portion 24a located along each of the upright walls 22a and 22b.
A plurality of connecting pieces 24b projecting upward from the upper edge of the flat plate portion 24a, a contact ring 24c is fixed to the center of the lower end of the flat plate portion 24a, and the contact ring 24c has a base end of the output terminal 24d. The part is fixed. The output terminal 24d penetrates through holes of the upright walls 22a and 22b, and its tip protrudes outside by a predetermined length.

Each connecting piece 24b of the current collector plate 24 is bent at a predetermined portion (bending base point 24b1), and the bent protruding portion 24b2 is formed by the upright portion 2b.
The battery terminal 21 of the predetermined unit cell 21 protruding from the inside of the heat insulating container 22 at a substantially right angle from 4b3 at a right angle,
a. Thereby, the secondary assembled battery 2
At 0, power is taken out through each connecting piece 24b, the flat plate 24a, and the output terminal 24d of the current collector 24.

The secondary battery 20 is connected to each cell 2
1 are housed and connected to each other, are sealed by a lid 25, are heated to a predetermined temperature by an electric heater 26 disposed at the bottom, are operated, and power is taken out from an output terminal 24d.

As shown in FIGS. 1 and 2, the bending jig 10 has a jig body 10a and a bending lever 10 as shown in FIGS.
b, first clamp mechanism 10c, second clamp mechanism 10
d and a guide mechanism 10e.

The jig body 10a includes a handle 11a, a first attachment 11b, a second attachment 11c, and a grip 11d.
The first mounting portion 11b has a first clamp mechanism 10
c is mounted, and a part of the guide mechanism 10e is mounted on the second mounting portion 11c. The grip portion 11d has a U-shaped vertical cross section that opens downward,
Each standing wall 22 of the heat insulating container 22 constituting the secondary assembled battery 20
Each of the upright walls 22a and 22b is formed in such a size that it can be loosely fitted to the upper end of each of the upright walls 22a and 22b.

The bending lever 10b is connected to the lever 12
a, an attachment part 12b, and a grip part 12c, and another part of the guide mechanism 10e is attached to the attachment part 12b. The grip portion 12c has a substantially L-shaped cross section, and the grip portion 11d of the jig body 10a is
In a state where each of the upright walls 22a and 22b is gripped by the operation c, it is formed so as to be in contact with the outer surface of the connection piece 24b of the current collector plate 24 constituting the secondary battery 20, and will be described later. The distal end of the connection piece 24b is gripped by the cooperative operation with the second clamp 10d.

The first clamp mechanism 10c is a laterally-pressed toggle clamp, and as shown in FIG. 3, an operation lever 13a, a rod 13b, and a plurality of links 14a,
14b, each of these components is attached to and supported by the support member 15. Support member 15
Consists of a pair of left and right support plate portions 15a and a cylindrical portion 15b,
The support plate portions 15a and 15b are fixed to the side surface of the first mounting portion 11b of the jig main body 10a, and the tip of the operation lever portion 13a is rotatably connected to the support plate portion 15a. The rod portion 13b penetrates through the inside of the cylindrical portion 15b of the support member 15 so as to be slidable in the front-rear direction.

The first link 14a is rotatably connected at its distal end to the rear end of the rod portion 13b, and is slidably connected at its rear end to a long hole of the operation lever portion 13a. Further, the second link 14b is rotatably connected to the rear end of the first link 14a at its distal end, and is slidably connected to the elongated hole of the operation lever portion 13a integrally with the first link 14a. At its rear end, it is rotatably connected to the support plate 15a.

In the first clamp mechanism 10c, when the operating lever 13a is in the state shown by the solid line in FIG. 3, the rod 13b is retracted and the operating lever 13a is lifted. When the link 14a and 14b are turned to the state shown by the two-dot chain line in FIG.
Are extended from each other in the front-rear direction to advance the rod portion 13b as shown by the two-dot chain line, and the grip portion 11 of the jig body 10a is
In cooperation with d, the vertical walls 22a and 22b of the heat insulating container 22 are gripped.

The second clamp 10d is also a side-pressing toggle clamp, and as shown in FIG.
a, a rod portion 16b, and a link 17, and attached to the side surface of the attachment portion 12b of the bending lever 10b in a state of being attached to the support member 18. The operation lever 16a has its base end supported by the two support portions 18a of the support member 18 so as to be rotatable in the front-rear direction, and projects horizontally. The rod portion 16b is
8 slidably penetrates through the inside of the cylindrical portion 18b in the front-rear direction. The link 17 has its tip end rotatably connected to the rear end of the rod portion 16b, and has its rear end connected to the operation lever portion 16b.
a is rotatably connected to the rotation end.

In the second clamp mechanism 10d, the second clamp mechanism 10d is attached to the inner surface of the attachment portion 12b of the bending lever 10b by the flange portion 18c of the support member 18, and
The rod portion 16b has a distal end that is positioned to face the inner surface of the grip portion 12c of the bending lever 10b, and the operation lever portion 16a
Is moved back and forth by a predetermined amount with respect to the gripping portion 12c. The state shown by the solid line in FIG. 4 is a state where the second clamp mechanism 10d is not operated, and when the operation lever 16a is rotated forward in the horizontal direction shown by the two-dot chain line in FIG. Move forward as indicated by.

As shown in FIGS. 1 and 2, the guide mechanism 10e includes an arc-shaped guide rail 19a and a plurality of guide rollers 19b and 19c. The guide rail 19a is fixed to the support plate 19d and is mounted on the inner surface side of the second mounting portion 11c of the jig body 11, and the position of the support plate 19d can be adjusted with respect to the second mounting portion 11c. Is configured. Thus, the position of the guide rail 19a is appropriately adjusted, and the guide rail 19a is positioned on a circle centered on a predetermined bending base point 24b1 of each connection piece 24b of the current collector plate 24.

On the other hand, the guide rollers 19b and 19c are rotatably supported on the outer surface of the mounting portion 12b of the bending lever 10b while being fitted to the respective side edges of the guide rail 19a. Thus, when the bending lever 10b rotates, the bending lever 10b rotates in an arc shape along the guide rail 19a around the bending base point 24b1 of the connection piece 24b of the current collector 24.

In order to bend each connecting piece 24b of the current collector 24 using the bending jig 10 configured as described above, each of the clamp mechanisms 10c and 10d is set in a non-operating state, and the jig is first set. The holding portion 11d of the main body 10a is attached to the standing wall 2 of the heat insulating container 22.
2a, 22b, while holding this state, moving to the left and right to hold the gripper 1 of the bending lever 10b.
2c is positioned on the back side (bending side) of the connection piece 24b of the current collector 24. Next, the first clamp mechanism 10c
Is lifted and turned.

Thus, the rod portion 13b of the first clamp mechanism 10c advances through the links 14a, 14b, and as shown in FIG. 1, the grip portion 11d of the jig body 10a.
In cooperation with the above, the upper ends of the standing walls 22a and 22b are gripped. After that, the operation lever 16a constituting the second clamp mechanism 10d is rotated forward in the horizontal direction. This allows
The rod portion 16b of the second clamp mechanism 10d is a link 17
Through the gripper 12c of the bending lever 10b
In cooperation with, the tip of the connection piece 24b is firmly gripped.

The bending jig 10 is thus placed in the heat insulating container 22.
After setting on the upper ends of the vertical walls 22a and 22b, the bending lever 10b is lifted and rotated upward as shown in FIG. As a result, the bending lever 10b is connected to the guide rail 19a of the guide mechanism 10e provided on the jig body 10a.
And the second clamp mechanism 10d and the gripping portion 12c are rotated integrally to bend the connecting piece 24b of the current collector 24.

In this case, when the bending lever 10b is rotated by approximately 90 degrees, the stopper 12 provided on the mounting portion 12b is
d is a stopper 19 provided at the tip of the guide rail 19a.
The rotation of the connection piece 24b is restricted by contacting the contact piece e, and the connection piece 24b is bent at a substantially right angle as shown by a two-dot chain line in FIG.

After the bending of the connecting piece 24b, the operation lever 16a of the second clamp mechanism 10d is turned back and the operation lever 13a of the first drive ramp mechanism 10c is turned back. As a result, the rod portions 13b and 16b of the clamp mechanisms 10c and 10d retreat,
The jig body 10a releases the gripping state with respect to the upright walls 22, 22b of the heat insulating container 22, and the bending lever 10e releases the gripping state with respect to the connecting piece 24b. Therefore, the bending jig 10 can be removed from the standing walls 22a and 22b of the heat insulating container 22 by moving the jig body 10a to the side.

As described above, according to the bending jig 10, the bending lever 10 b is connected to the connecting piece 24 b of the current collector 24.
While holding the connection piece 24b,
It is possible to carry out a bending method in which the connecting piece 24b is bent almost exactly at the bending base point 24b1, and the bending method can be performed. The shape of 24b1 is also acute. For this reason,
The projecting dimension of the bent projecting portion 24b2 in the connecting piece 24b is accurate and constant.

FIG. 8 shows an example in which the bending lever 10b constituting the bending jig 10 is changed. In the bending lever 10b constituting the bending jig 10, the tip side surface 12 of the gripper 12c located at the tip end thereof
c1 is the bent base end 2 of the connection piece 24b of the current collector 24.
4b1 is formed in a length reaching the vicinity. Accordingly, when the connecting piece 24b is gripped by the bending lever 10b and the second clamp mechanism 10d, the tip side surface 12c1 of the grip 12c reaches the vicinity of the bending base point 24b1 on the back side of the connecting piece 24b.

Therefore, in this state, the bending lever 10b
Is pivoted upward to bend the connection piece 24b, and the connection piece 24b is bent at the tip side surface 12c1 of the grip portion 12c, with the entire back surface from above to the bending base point 24b1 being supported. That is, the connecting piece 24b is more accurately bent at the bending base end 24b1.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a bending jig according to the present invention.

FIG. 2 is a plan view of the bending jig.

FIG. 3 is a side view of a clamp mechanism included in a jig body constituting the bending jig.

FIG. 4 is a plan view of a clamp mechanism included in a bending lever included in the bending jig.

FIG. 5 is a partially omitted plan view showing a state in which a lid of an assembled battery having a current collector plate as a connecting member that is bent by the bending jig is opened;

FIG. 6 is an enlarged longitudinal sectional view of the assembled battery, partially omitted, as viewed in the direction of arrows 6-6 in FIG.

FIG. 7 is a front view of a current collector plate as the connection member.

FIG. 8 is a side view showing another example of the bending jig according to the present invention.

[Explanation of symbols]

Reference Signs List 10: bending jig, 10a: jig body, 10b: bending lever, 10c: first clamping mechanism, 10d: second clamping mechanism, 10e: guide mechanism, 12c: gripping part, 12
c1 ... tip side surface, 19a ... guide rail, 19b, 19
c: guide roller, 20: assembled battery, 21: single cell, 2
1a, 21b: Battery terminal, 22: Insulated container, 22a, 2
2b ... standing wall, 24 ... current collecting plate, 24b ... connecting piece, 24b
1 ... Bending origin, 24b2 ... Bending projection.

Claims (10)

(57) [Claims] A bent member provided in a box body and standing upright along an inner surface of an upright wall of the box body and projecting a predetermined length from an upper opening of the box body is bent with a predetermined portion as a base point. A method of bending a bending member that holds a predetermined intersection angle with respect to the inner surface of the upright wall and projects inward of the box body,
The bending member for bending the bending member is rotated by rotating a bending lever gripping a protruding end of the bending member in an arc around the bending base point of the bending member. The bending method of the bending member. 2. A state in which the bending lever is supported at a projecting end of the member to be bent from above along a surface on the bending side to a bending base point or near the base point. The method for bending a bent member according to claim 1, wherein the bending member is bent. 3. The container according to claim 1, wherein the box is a container for accommodating a large number of secondary cells, and the bent member is a connection member for connecting the cell and an output terminal. 2. The method for bending a member to be bent according to 1. 4. The method according to claim 3, wherein the box is an insulated container, and the unit cell is a sodium-sulfur battery. 5. A bent member provided in the box body and standing upright along the inner surface of the upright wall of the box body and projecting a predetermined length from an upper opening of the box body, is bent with a predetermined portion as a base point. A bending jig for a bent member that protrudes inward of the box while maintaining a predetermined crossing angle with respect to an inner surface of the standing wall, and a clamp that grips an upper end portion of the standing wall of the box. A jig body having a mechanism, a bending lever having a clamp mechanism for gripping a protruding end of the bent member, and an arc-shaped guide member centered on a bending base point of the bent member. A bending jig for a member to be bent, comprising: a guide mechanism provided between the jig main body and the bending lever for rotating the bending lever along the guide member. 6. A gripping portion, wherein the bending lever is located along a surface on a bending side of a protruding end of the bent member and cooperates with the clamp mechanism to hold the protruding end. The bending jig for a member to be bent according to claim 5, wherein the bending jig is provided. 7. A length of the gripping portion of the bending lever extending downward from above at the projecting end of the member to be bent along the surface on the bending side to reach the bending base point or the vicinity of the base point. 7. The bending jig for a member to be bent according to claim 6, wherein the bending jig is formed at the same position. 8. The container according to claim 1, wherein said box is a container for accommodating a large number of secondary cells, and said bent member is a connecting member for connecting said cell and an output terminal. 6. The bending jig for a member to be bent according to 5. 9. The bending jig according to claim 8, wherein the box is a heat insulating container, and the secondary cell is a sodium-sulfur battery. 10. The bending jig for a member to be bent according to claim 5, wherein each of the clamp mechanisms is a side-pressing type toggle clamp.