JP2004337905A - Gripping tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gripping tool which can grip a base material of a gripping target while cooling it. <P>SOLUTION: The gripping tool has a first jaw part 2 and a second jaw part 3, in which gripping pieces 1 are respectively mounted to each tip, and a pair of handle members 4, 5 connected to the first jaw part 2 and the second jaw part 3. At least either one of the first jaw part 2 and the second jaw part 3 is axially supported so as to be rotatable. The oppositely arranged gripping pieces 1 are capable of opening and closing. A watertight hollow part is formed inside the gripping piece 1. A coolant injection part and a coolant discharging part are provided to the hollow part. The coolant is constituted to the inside of the gripping piece 1 so as to be circulable. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gripping tool having a function of cooling a base material to be gripped.
[0002]
[Prior art]
Conventionally, when relatively small parts are to be arc-welded, the base metal to be welded is gripped by a gripping tool (for example, see Non-Patent Document 1), and asbestos impregnated with water is arranged around the base metal. Was prevented from heating.
[Non-patent document 1]
Written by Yoshifumi Amamiya, “Modern Electronic Circuits I”, 1st edition, Ohmsha Ltd., December 1979, p. 25 Figure 2.28
[0003]
[Problems to be solved by the invention]
However, in the case of the conventional method, the weldability is reduced due to steam generated from asbestos during heating. When the welding range is narrow, a sufficient cooling effect may not be obtained because the amount of asbestos that can be used is limited.
[0004]
In addition, in the welding of a portion related to an electronic device, water cannot be directly used for cooling from the viewpoint of preventing a short circuit, so that welding cannot be performed by the above-described conventional method.
Furthermore, in recent years, hybrid vehicles using a capacitor (electric double layer capacitor) have been put to practical use in order to cope with environmental problems. However, welding the electrodes of such a capacitor causes the following problems.
[0005]
For example, when capacitors are connected in series, the anode of one capacitor, the cathode of the other capacitor, and the power extraction terminal of the capacitor are welded in one place. Since each of these members is a thin plate, it is convenient to restrain and weld with a gripping tool. However, when heat during welding is transmitted to the capacitor body, the capacitor is adversely affected. Therefore, means for holding an electrode or the like without transmitting heat to the capacitor body is required.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in order to eliminate the above-mentioned disadvantages of the related art, and an object of the present invention is to provide a gripping tool capable of gripping while cooling a base material to be gripped.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 includes a first jaw and a second jaw each having a gripping piece attached to a tip thereof, and a pair of handle members connected to the first jaw and the second jaw. At least one of the first jaw portion and the second jaw portion is rotatably supported by a shaft, and the gripping piece disposed opposite to the gripping tool is openable and closable, and is watertight inside the gripping piece. Is formed, the hollow portion is provided with a refrigerant injection part and a refrigerant discharge part, and the refrigerant can be circulated inside the gripping piece.
[0008]
According to the first aspect of the present invention, the coolant can be circulated inside the gripping pieces arranged opposite to each other, so that the base material gripped by the gripping tool is cooled by the gripping pieces on both sides.
According to a second aspect of the present invention, in the first aspect, the gripping piece is rotatable in a vertical direction and a horizontal direction with respect to the first jaw or the second jaw. I do.
[0009]
According to the second aspect of the invention, the position of the holding piece can be finely adjusted by rotating the holding piece in the vertical direction and the horizontal direction.
According to a third aspect of the present invention, in the first or second aspect of the present invention, the refrigerant injection portion and the refrigerant discharge portion are arranged apart from each other in a longitudinal direction of the hollow portion. And
[0010]
According to the third aspect of the invention, the refrigerant flowing into the hollow portion from the refrigerant injection portion flows out to the refrigerant discharge portion separated from the refrigerant injection portion, and the refrigerant moves evenly in the hollow portion.
According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, an upper surface side of the gripping piece is insulated.
According to the fourth aspect of the invention, the arc is not short-circuited to the insulated gripping piece during the welding of the base material.
[0011]
According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, a lock mechanism for adjusting a relative distance between the opposed gripping pieces is provided.
According to the fifth aspect of the invention, by adjusting the relative distance between the gripping pieces, the gripping tool can reliably grip the base material.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention corresponding to claims 1 to 5 will be described in detail with reference to the drawings.
The gripping tool according to the present embodiment includes a pair of gripping pieces 1, an immovable first jaw 2 and a movable second jaw 3 which are arranged in an opposed state, and a pair of U-shaped handle members 4. , 5. Circular arm receiving holes 6 are respectively opened on the front sides of the first jaw 2 and the second jaw 3, and the upper surfaces of the first jaw 2 and the second jaw 3 are orthogonal to the arm receiving holes 6. A set screw hole is opened, and a set screw 7 is screwed.
[0013]
A first handle member 4 is fixed to the rear side of the first jaw 2. A lock screw 8 is screwed to the rear end of the first handle member 4, and the tip of the lock screw 8 protrudes inward along the longitudinal direction of the handle of the first handle member 4. Further, the tip position of the lock screw 8 can be adjusted by tightening the lock screw 8.
The inner rear end of the second jaw 3 is pivotally supported by the first handle member 4 of the first jaw 2 with a pin 9 so that the second jaw 3 can be opened and closed with respect to the first jaw 2. Have been. A second handle member 5 is rotatably supported by a pin 9 at the outer rear end of the second jaw 3.
[0014]
The other end of a spring 10 having one end fixed to the first handle member 4 is attached to the rear side of the second jaw 3. The spring 10 urges the second jaw 3 in a direction to pull it away from the first jaw 2.
One end of a link member 11 is rotatably supported by a pin 9 on the second handle member 5 attached to the second jaw 3. The other end of the link member 11 is disposed inside the first handle member 4. The other end of the link member 11 is in contact with the tip of the lock screw 8 by the urging force of the spring 10.
[0015]
Further, an opening lever 12 is attached inside the second handle member 5 behind the link member 11. The release lever 12 is rotatably supported on the second handle member 5 by a pin 9.
On the other hand, each gripping piece 1 attached to the first jaw 2 and the second jaw 3 is composed of a gripping piece main body 13 and an arm 14. One end of the arm portion 14 is rotatably supported by pins 9 between two receiving plates 15 formed outside the gripping piece main body 13. The receiving plate 15 of the gripping piece main body 13 is formed to be inclined obliquely, and the arm portion 14 is positioned diagonally upward when the gripping piece main body 13 is horizontally arranged (see FIG. 3).
[0016]
The other end of the arm 14 has a circular cross section slightly smaller in diameter than the arm receiving hole 6, and the other end of the arm 14 is inserted through the arm receiving hole 6 of the first jaw 2 or the second jaw 3. You. The other end of the arm portion 14 is pressed and fixed inside the arm receiving hole 6 by set screws 7 screwed to the first jaw portion 2 and the second jaw portion 3, respectively.
That is, each gripping piece 1 is arranged in a state of facing the tip of the first jaw 2 and the second jaw 3 and opens and closes with the movement of the first jaw 2 and the second jaw 3. I have. Further, since each gripping piece main body 13 is connected to the arm portion 14 by the pin 9, it can be rotated substantially horizontally with respect to each of the jaws 2, 3. Further, by loosening the set screw 7, the arm portion 14 can be rotated in the vertical direction with respect to each of the jaws 2 and 3.
[0017]
FIG. 4 is a perspective view showing the grip piece main body 13 on one side. A hollow portion 16 extending in the longitudinal direction of the gripping piece main body 13 is formed inside each gripping piece main body 13, and a refrigerant injection pipe 17 and a refrigerant discharge pipe 18 are inserted into the hollow portions 16. The ends of the refrigerant injection pipe 17 and the refrigerant discharge pipe 18 are arranged apart from each other in the longitudinal direction of the hollow part 16.
[0018]
The refrigerant injection pipe 17 and the refrigerant discharge pipe 18 are bundled with a base 19, and the boundary between the gripping piece body 13 and the base 19 and the inside of the base 19 are sealed with a sealing material (not shown). Therefore, the hollow portion 16 of the gripping piece main body 13 is maintained in a water-tight state, and the refrigerant circulates without leaking from the hollow portion 16.
Here, from the viewpoint of enhancing the cooling effect of the refrigerant circulating in the hollow portion 16, it is preferable that the gripping piece main body 13 be formed of a material having high heat conductivity. When the gripping piece main body 13 is formed of a conductive material, an arc may be short-circuited to the gripping piece main body 13 when the arc welding base material is gripped by the gripping tool. It is preferable to perform insulation treatment by covering with rubber or silicon.
[0019]
The gripping tool according to the present embodiment is configured as described above, and its operation will be described below by taking welding of electrodes of a capacitor as an example.
When the gripping tool of the present embodiment grips a base material (anode and cathode of a capacitor, a power terminal) 20 made of a plurality of thin plates, the gripping tool is positioned so that the base material 20 is located between the gripping piece main bodies 13. And grip the first handle member 4 and the second handle member 5.
[0020]
Accordingly, the second handle member 5 pushes the outer rear end of the second jaw 3 forward with the support of the link member 11 as a fulcrum. The second jaw 3 pressed forward rotates about the pin support at the inner rear end, and the immovable first jaw 2 and the movable second jaw 3 close. Then, with the closing movement of the first jaw 2 and the second jaw 3, the grasping piece main body 13 facing the front is closed and the base material 20 is grasped. Since the arm portion 14 is positioned obliquely upward with respect to the gripping piece main body 13, there is no interference between the pipe 21 that integrates the refrigerant injection pipe 17 and the refrigerant discharge pipe 18, the arm section 14, and the like.
[0021]
At this time, by rotating the holding piece 1 in the horizontal direction or the vertical direction, the contact state between the holding piece main body 13 and the base material 20 can be adjusted. Further, when the lock screw 8 of the first handle member 2 is tightened in this gripping state, the second handle member 5 is pressed forward via the link member 11, and the grip piece main body 11 of the second jaw 3 is moved to the first jaw. The gripper body 13 of the part 2 is further approached. Therefore, by adjusting the lock screw 8 of the first handle member 4, the tightening of the gripping piece main body 13 can be increased.
[0022]
Next, a coolant such as water or oil is injected into the coolant injection pipe 17, and the coolant is sent into the hollow portion 16 of the gripping piece main body 13. Thereafter, welding of the base material 20 is started. The refrigerant that has flowed into the hollow part 16 removes the heat of the gripping piece main body 13 from the inner wall of the hollow part 16 and is discharged from the refrigerant discharge pipe 18 and circulated. Therefore, the heat generated at the time of welding is not cooled by the holding piece body 13 and transmitted to the capacitor body (not shown).
[0023]
Further, since the end of the refrigerant injection pipe 17 and the end of the refrigerant discharge pipe 18 are arranged apart from each other in the longitudinal direction of the hollow portion 16, from the end of the refrigerant injection pipe 17 to the end of the refrigerant discharge pipe 18. The refrigerant moves evenly in the hollow portion 16 and the cooling efficiency is good. In addition, since the upper surface side of the gripping piece main body 13 is insulated, there is no possibility that an arc is short-circuited to the gripping piece main body 13 during welding.
[0024]
Then, after the welding is completed, the circulation of the refrigerant is stopped if necessary, the gripping piece main body 13 is separated, the gripping tool is removed, and the welded base material 20 is taken out. At this time, when the release lever 12 and the first handle member 4 are gripped and the release lever 12 is rotated inward, the second handle member 5 is pushed outward, and thereafter, the first handle member 4 and the second jaw portion. The second jaw 3 is rotated in a direction away from the first jaw 2 by the urging force of the spring 10 between the two, and the base material 20 can be easily opened.
[0025]
Although the present invention has been described with the above embodiment, the technical scope of the present invention is not limited to the above embodiment. For example, the gripping tool of the present invention is not only applied to electrode welding of a capacitor, but can be widely applied to, for example, cooling of welding using a gripping tool, or holding a base material and partially cooling it.
[0026]
【The invention's effect】
In the present invention, a watertight hollow portion is formed inside a gripping piece attached to the tip of the gripping tool, and by circulating a refrigerant inside the gripping piece, the base material to be gripped is cooled directly without water cooling. It is possible to hold it. Therefore, the present invention is applied to a case where welding using a conventional gripping tool is difficult (for example, a case where a water cannot be directly used for cooling at a welded portion, or a case where heat of welding is processed by a gripped portion). Can be applied, and an extremely excellent effect can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a state in which a gripping tool of the present embodiment is gripping a base material.
FIG. 2 is a plan view of the gripping tool of the embodiment.
FIG. 3 is a side view of the gripping tool according to the embodiment.
FIG. 4 is a perspective view showing a grip piece main body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Grip piece 2 1st jaw 3 2nd jaw 4 1st handle member 5 2nd handle member 6 Arm receiving hole 7 Set screw 8 Lock screw 9 Pin 10 Spring 11 Link material 12 Release lever 13 Gripping piece main body 14 Arm part 15 Receiving plate 16 Hollow portion 17 Refrigerant injection tube 18 Refrigerant discharge tube 19 Base 20 Base material 21 Pipe

Claims (5)

A gripping piece has a first jaw and a second jaw respectively attached to the distal end, and a pair of handle members connected to the first jaw and the second jaw. A gripping tool in which at least one of the second jaws is rotatably supported, and the gripping pieces arranged opposite to each other can be opened and closed.
A gripping tool, wherein a watertight hollow portion is formed inside the gripping piece, the hollow portion is provided with a refrigerant injection portion and a refrigerant discharge portion, and a refrigerant can be circulated inside the gripping piece. . The gripping tool according to claim 1, wherein the gripping piece is rotatable in a vertical direction and a horizontal direction with respect to the first jaw or the second jaw. 3. The gripping tool according to claim 1, wherein the coolant injection part and the coolant discharge part are arranged apart from each other in a longitudinal direction of the hollow part. 4. The gripping tool according to any one of claims 1 to 3, wherein an upper surface side of the gripping piece is insulated. The gripping tool according to any one of claims 1 to 4, further comprising a lock mechanism for adjusting a relative distance between the gripping pieces facing each other.

Images