JPH10235494A - Clamp jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the constitution, and to reduce the cost by moving a reference piece to one side of a work to be clamped, and moving a clamp piece to the other side opposite to the reference piece by a single clamp driving member. SOLUTION: A base end of a clamp piece 7 is pin-connected using a pin 6 at the tip of a piston rod 5 of a clamp cylinder 4, and a free edge of the clamp piece 7 is bent in a hook shape and set on a clamp part 7a to clamp a work 8 to be clamped. The work 8 is, for example, a work for welding (a pressed parts) provided with an outer member 8a and an inner member 8b to constitute an automobile body, and the spot welding is performed at the required parts of the work 8 under the clamped condition. A link 12 is turnably connected between a bracket 9 provided on an upper part of a base body and an intermediate part in the longitudinal direction of the clamp piece 7 using support shafts 10, 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, in a vehicle body assembling process, and is used for welding works (pressed parts, etc.).
The present invention relates to a clamp jig that clamps other components.

[0002]

2. Description of the Related Art Conventionally, as a clamp jig of the above-mentioned example, there is a jig having a structure as shown in FIG. That is, the base 72 is erected and fixed on the jig bed 71, and the support shaft 7 is attached to the base 72.
3, a movable plate 74 is provided. The movable plate 74 has a reference metal 76 corresponding to one side of a workpiece 75 as an object to be clamped, and a clamp metal 78 is pivotally mounted via a support shaft 77. The clamp jig further includes a cylinder 79 (clamping cylinder) for driving the clamp 78 and a cylinder 80 (relief cylinder) for driving the movable plate 74.

In this conventional apparatus, first, the cylinder 80 is driven so that the stopper 81 on the movable plate 74 contacts the stopper 82 on the base 72, and the reference metal 76 contacts one side of the work 75. Clamping cylinder 7
9, the clamp gold 78 is moved to the other side of the work 75, and the work 75 is clamped by both of them.

According to the conventional clamp jig, the movable plate 74 is rotated counterclockwise by the cylinder 80 at the time of disposing (loading) the work 75 from above and below and at the time of taking out the work 75 from the work 75, so that the work 75 is rotated. This has the advantage of preventing mutual interference between the tool and the jig side (mainly the reference metal 76), but because of the necessity of a total of two cylinders, a clamping cylinder 79 and a relief cylinder 80, these are required. Valves for operating the cylinders 79 and 80, pipes, wiring, a detector for detecting the stroke end on the rod side, a detector for detecting the stroke end on the head side, and the like are indispensable.
There is a problem that the structure becomes complicated and the cost becomes high.

On the other hand, a clamp device as described in Japanese Utility Model Application Laid-Open No. 2-15839 has already been invented, but it has been difficult to apply it as a clamp device for welding because the clearance of the clamp member is small.

[0006]

SUMMARY OF THE INVENTION According to the first aspect of the present invention, a single clamp driving member, and a clamp metal and a reference metal which are moved by the clamp driving member are provided, respectively. The clamp drive member can move the clamp metal and the reference metal, simplifying the configuration and reducing the cost, and furthermore, the clamp member can be moved in a state where there is no mutual interference between the member on the jig and the object to be clamped. An object of the present invention is to provide a clamp jig capable of taking a clamp object in and out.

According to a second aspect of the present invention, in addition to the object of the first aspect, a clamp metal having one end connected to a clamp cylinder by a pin, and both ends connected to the clamp metal and a base are provided. With the provided link and the reference metal pressed by the turning of the link, the clamp metal and the reference metal can be moved by one cylinder,
An object of the present invention is to provide a clamp jig capable of simplifying the configuration and reducing costs.

According to a third aspect of the present invention, in addition to the object of the second aspect, by providing a link stopper for stopping the link at a predetermined position, a reference is established by stopping the link at a predetermined position. An object of the present invention is to provide a clamp jig that can easily position gold at a reference position and that can secure a reliable clamp operation thereafter.

According to a fourth aspect of the present invention, in addition to the object of the second aspect, by providing a return spring for returning the above-mentioned reference metal, the tolerance of link joining is improved. It is another object of the present invention to provide a clamp jig having a simple structure.

According to a fifth aspect of the present invention, in addition to the object of the second aspect, the link system can be simply configured by swingably supporting the clamp cylinder. The purpose is to provide a clamp jig that can be used.

According to a sixth aspect of the present invention, in addition to the object of the second aspect of the present invention, a single object can be obtained by setting the object to be clamped for welding to a welding jig. It is an object of the present invention to provide a clamp jig that can be effectively applied to a large number of welding jigs used for each clamped object and that can significantly reduce costs.

[0012]

According to the first aspect of the present invention, a reference metal is moved to one side of an object to be clamped, and a clamp metal is moved to the other side opposite to the reference metal for clamping. A clamp jig, comprising: a single clamp drive member, a clamp metal moved by the clamp drive member, and a reference metal moved by the clamp drive member. I do.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the reference metal is moved to one side of the object to be clamped and the clamp is mounted on the other side opposite to the reference metal. A clamp jig for moving and clamping gold, the clamp jig having one end connected to a clamp cylinder by a pin, a link having both ends connected to the clamp metal and a base, and being pressed by turning of the link. It is a clamp jig provided with a reference metal.

According to a third aspect of the present invention, in addition to the configuration of the second aspect of the present invention, there is provided a clamp jig provided with a link stopper for stopping the link at a predetermined position. I do.

According to a fourth aspect of the present invention, in addition to the configuration of the second aspect, the present invention is a clamp jig provided with a return spring for returning the reference metal. .

According to a fifth aspect of the present invention, in addition to the configuration of the second aspect of the present invention, there is provided a clamp jig which swingably supports the clamp cylinder.

According to a sixth aspect of the present invention, there is provided a clamp jig set for a welding jig for clamping an object to be clamped for welding, in addition to the configuration of the second aspect of the present invention. It is characterized by.

[0018]

According to the first aspect of the present invention, the reference metal is moved to one side of the object to be clamped by the single clamp driving member, and the single clamp driving member is moved. As a result, the clamp metal is moved to the other side of the object to be clamped opposite to the reference metal, and the object to be clamped is clamped by the reference metal and the clamp metal. As described above, since the clamp metal and the reference metal can be moved by the single clamp driving member, there is an effect that the configuration can be simplified and the cost can be reduced. In addition, when the clamp metal and the reference metal are moved back in the unclamping direction by a single clamp driving member when the object to be clamped is taken in and out, the object to be clamped does not interfere with the member on the jig side and the object to be clamped. There is an effect that can be put in and out.

According to the second aspect of the present invention,
In addition to the effect of the first aspect of the present invention, when the link is turned via the clamp metal by the clamp cylinder,
The reference metal is pressed by the link, the reference metal is moved to one side of the object to be clamped, and when the clamp cylinder is further operated, the above-described clamp metal is moved to the other side of the object to be clamped opposite to the reference metal. Then, the object to be clamped is clamped by the reference metal and the clamp metal. As described above, since the clamp metal and the reference metal can be moved by one clamp cylinder, there is an effect that the configuration can be simplified and the cost can be reduced.

According to the third aspect of the present invention,
In addition to the effect of the second aspect of the present invention, since the link stopper stops the link at a predetermined position, the positioning of the reference metal pressed by the link to the reference position is simplified by stopping the link at the predetermined position. The movement of the clamp after stopping the link has the effect of ensuring a secure clamping operation thereafter.

According to the invention described in claim 4 of the present invention,
In addition to the effect of the invention described in claim 2, a return spring for returning the above-mentioned reference metal is provided, so that this reference metal only needs to have a function of being pressed by turning of the link. It is not necessary to employ a direct connection structure between the link and the link, and as a result, there is an effect that the tolerance of link joining is improved and the structure can be simplified.

According to the invention described in claim 5 of the present invention,
In addition to the effect of the second aspect of the present invention, since the above-mentioned crimp cylinder is supported so as to be swingable, it corresponds to the movement locus of the pin connection point when the clamp metal and the link move in the clamping direction and the unclamping direction. As a result, the clamp cylinder can be swung, and as a result, there is an effect that the link system can be simply configured.

According to the invention described in claim 6 of the present invention,
In addition to the effects of the second aspect of the present invention, since the above-mentioned clamp jig is set as a welding jig for clamping an object to be clamped for welding, it is possible to use a large number of objects per single object to be clamped. It is most suitable for welding to be performed, and has an effect that the cost can be significantly reduced.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawings show a clamp jig. In FIGS. 1 to 3, the clamp jig fixes a base 2 upright on a jig bed 1, and a support shaft 3 is provided on one side of an intermediate portion in the vertical direction of the base 2.
, One clamp cylinder 4 as a single clamp drive 2 member is swingably supported.

The base end of a clamp metal 7 (clamp arm) is connected to the distal end of the piston rod 5 of the clamp cylinder 4 with a pin 6 using a pin 6, and the free end of the clamp metal 7 is bent in a fishing shape and covered. The clamp 8 is set in a clamp section 7a for clamping a work 8 as a clamp object.

The above-mentioned work 8 is, for example, a welding work (pressed part) provided with an outer member 8a and an inner member 8b constituting the body of an automobile. Spot welding is performed where necessary. Further, a link 12 (link plate) is pivotably connected between the bracket 9 provided on the upper portion of the base body 2 and the intermediate portion in the longitudinal direction of the clamp metal 7 by using support shafts 10 and 11. .

Here, the above-mentioned bracket 9 arranging portion is formed in a notch concave portion which is cut in an inverted L-shape with the vertical plane horizontal plane, and the above-mentioned vertical plane is formed by a link stopper 13 for stopping the link 12 at a predetermined position. You have set. That is, the vertical surface itself is used as a link stopper surface without providing a separate member to form a link stopper, thereby simplifying the configuration. However, instead of the configuration of this embodiment, a separate member is used. It goes without saying that a stopper may be provided.

Further, a reference metal 16 is disposed at the upper end of the base 2 via a guide block 14 (reference gold holding means) and a bush 15 (reference gold guide means) so as to be axially movable. The reference metal 16 is pressed in the clamp direction by turning.

As shown in the enlarged view of FIG. 4, the above-described reference metal 16 has a retaining pin 17 (retaining means) on the work 8 side and a head 16 integrally formed on the link 12 side.
A coil spring 18 serving as a return spring (urging means) is stretched between a and the bush 15 so that the reference metal 16 is moved back by the coil spring 18 at the time of unclamping. Here, the portion of the head 16a facing the link 12 is formed in a hemispherical shape so that the reference metal 16 is smoothly pressed by the link 12 without any twisting.

The illustrated embodiment is constructed as described above, and the operation will be described below. In the unclamped state shown in FIG. 1, for example, a work 8 is supplied from above, and when the piston rod 5 of the clamp cylinder 4 is moved forward from this unclamped state, the piston rod 5 is connected to the tip of the piston rod 5 using the pin 6. As the clamp metal 7 moves upward sequentially, the link 12 pivots around the support shaft 10, and as shown in FIG.
The link 12 stops at a predetermined position when it comes into contact with the link.

When the link 12 turns from the state shown in FIG. 1 to the state shown in FIG. 2, the reference metal 16 is pressed by the link 12 and protrudes toward the work 8 against the urging force of the coil spring 18. The reference money 16 is moved to one side of the work 8 and the reference position is set.

When the piston rod 5 of the clamp cylinder 4 is further moved forward from the state shown in FIG.
Is rotated about the support shaft 11, the clamp portion 7a of the clamp metal 7 moves to the other side of the work 8 facing the reference metal 16 with the work 8 therebetween, and the work 8 is set at the reference position. Reference metal 16 and clamp portion 7a of clamp metal 7
Clamp between.

As described above, during the period from the unclamped state shown in FIG. 1 to the clamped state shown in FIG.
The above-described clamp cylinder 4 swings with the support shaft 3 as a fulcrum corresponding to the movement locus of the pin connection point (see the position of the pin 6).

At the time of completion of the clamping shown in FIG. 3, spot welding is performed on a required portion of the work 8, and after the completion of the spot welding, the operation reverse to the above is performed from the clamping state shown in FIG. 3 to the state shown in FIG. The workpiece 8 is returned to the unclamped state (normal state) shown in FIG. 1, and after the spot welding is completed, the work 8 is taken out from the virtual line position in FIG.

Here, at the time of the above-mentioned return movement, the link 12
When is turned in the counterclockwise direction from the state shown in FIG. 2, it is moved back in the unclamping direction by the spring force of the reference metal 16 and the coil spring 18, and the retaining pin 17 stops the removal.

In short, the reference metal 16 is moved to one side of the work 8 by the above-mentioned single clamp driving member (see the clamp cylinder 4), and is clamped by the above-mentioned single clamp driving member (see the clamp cylinder 4). The gold 7 is moved to the other side (the right side in the figure) of the work 8 facing the reference gold 16, and the work 8 is clamped by the reference gold 16 and the clamp gold 7. As described above, since the clamp metal 7 and the reference metal 16 can be moved by a single clamp driving member (see the clamp cylinder 4), there is an effect that the configuration can be simplified and the cost can be reduced. Moreover, when the clamp metal 7 and the reference metal 16 are moved back in the unclamping direction by a single clamp driving member (refer to the clamp cylinder 4) when the workpiece 8 is taken in and out, mutual interference between the workpiece on the clamp jig side and the workpiece 8 is achieved. There is an effect that the work 8 can be taken in and out with no work.

When the link 12 is turned by the clamp cylinder 4 via the clamp metal 7, the link 1
The reference metal 16 is pressed by 2 and the reference metal 16 is moved to one side of the work 8. When the clamp cylinder 4 is further operated, the above-described clamp metal 7 is moved to the other side of the work 8 facing the reference metal 16. The workpiece 8 is moved and clamped by the reference metal 16 and the clamp metal 7. Since the clamp metal 7 and the reference metal 16 can be moved by one clamp cylinder 4 in this manner, there is an effect that the configuration can be simplified and the cost can be reduced.

Further, since the link stopper 13 stops the link 12 at a predetermined position, the reference metal 1 pressed by the link 12 when the link 12 stops at the predetermined position.
6 can be easily positioned to the reference position,
The movement of the clamp metal 7 after the stop of the link 12 has an effect that a secure clamp operation thereafter can be secured. That is, one (link 12) is stopped and the reference
Since the other (clamp gold 7) is moved after setting 6 at the reference position, there is an effect that the clamping operation is surely performed in a configuration in which both are moved.

In addition, since the return spring (see the coil spring 18) for returning the above-mentioned reference metal 16 is provided, the reference metal 16 only needs to have a function of being pressed by the turning of the link 12. There is no need to employ a direct connection structure between the reference metal 16 and the link 12, and as a result, the tolerance of joining the link 12 is improved, and the structure can be simplified.

Further, since the above-described crimp cylinder 4 is swingably supported, the movement of the pin 7 (see the position of the pin 6) when the clamp metal 7 and the link 12 are moved in the clamping and unclamping directions. Correspondingly, the clamp cylinder 4 can be swung, and as a result, there is an effect that the link system can be simply configured.

Further, since the above-mentioned clamping jig is set as a welding jig for clamping the work 8 for welding, it is most suitable as a large number of welding jigs used per single work 8. Thus, there is an effect that the cost can be significantly reduced.

FIG. 5 shows another embodiment of the clamp jig.
In the case where a positioning opening 19 is formed on the work 8 side, a positioning projection 20 which is allowed to be inserted into the opening 19 and performs positioning is provided at the distal end of the above-mentioned reference metal 16 and the clamp metal 7 is provided. A concave portion 21 is provided in the clamp portion 7a to allow the positioning projection 20 to be inserted.

With this configuration, the work piece 8 can be positioned and held more accurately by the above-described positioning projection 20 while effectively utilizing the positioning opening 19 on the work 8 side. Note that the shape of the positioning projection 20 is not limited to the tapered cone shape shown in the figure, and may be a cylindrical shape or the like whose tip is machined into a hemisphere.

Even with this configuration, the operation and effects are substantially the same as those of the previous embodiment in other respects. Therefore, in FIG. Is omitted. FIG. 6 shows still another embodiment of the clamp jig, in which a screw hole 22 is formed at the tip of the reference metal 16 by screwing, and a head 2 of a bolt 23 screwed into the screw hole 22.
3a is configured to abut one side of the work 8.

With this configuration, since the position of the head 23a of the bolt 23 can be variably adjusted, there is an effect that the positioning position of the work 8 by the reference metal 16 can be finely adjusted. It is designed to be able to cope with wear. It is theorized that the positioning protrusion 20 shown in FIG. 5 may be formed integrally or integrally with the bolt head 23a. Even with such a configuration, the other points have substantially the same operation and effect as those of the previous embodiment. Therefore, in FIG. Omitted.

In the correspondence between the configuration of the present invention and the above-described embodiment, the clamped object of the present invention corresponds to the work 8 as the welded object constituting the body of the automobile. , The return spring corresponds to a coil spring, but the present invention is not limited to the configuration of the above-described embodiment. For example, instead of the retaining pin 17 provided on the reference metal 16, a flange may be integrally provided on the reference metal 16, and this flange may be used as a retaining means.

[Brief description of the drawings]

FIG. 1 is a side view of the clamp jig of the present invention in an unclamped state.

FIG. 2 is a side view showing a state in which a link is stopped at a predetermined position.

FIG. 3 is a side view of the clamp jig of the present invention in a clamped state.

FIG. 4 is an enlarged view of a main part of FIG. 3;

FIG. 5 is an enlarged view of a main part showing another embodiment of the clamp jig of the present invention.

FIG. 6 is an enlarged view of a main part showing still another embodiment of the clamp jig of the present invention.

FIG. 7 is a side view showing a conventional clamp jig.

[Explanation of symbols]

 2. Base 4 Clamp cylinder 7 Clamp 8 Work 12 Link 13 Link stopper 16 Reference gold 18 Coil spring

Claims (6)

[Claims] 1. A clamp jig for moving a reference metal to one side of an object to be clamped and for moving and clamping the clamp metal to the other side opposite to the reference metal, comprising: a single clamp driving member; A clamp jig including a clamp gold moved by the clamp drive member and a reference metal moved by the clamp drive member. 2. A clamp jig for moving a reference metal to one side of an object to be clamped and for moving the clamp metal to the other side opposite to the reference metal and clamping the clamp jig. The clamp jig according to claim 1, further comprising a clamp metal, a link having both ends connected to the clamp metal and the base, and a reference metal pressed by turning the link. 3. The clamp jig according to claim 2, further comprising a link stopper for stopping said link at a predetermined position. 4. The clamp jig according to claim 2, further comprising a return spring for returning said reference metal. 5. The clamp jig according to claim 2, wherein said clamp cylinder is swingably supported. 6. The clamp jig according to claim 2, wherein the clamp jig is set for a welding jig for clamping an object to be clamped for welding.