JP7175492B2 - Work clamp tray with tapered work contact area - Google Patents

Description

TECHNICAL FIELD The present invention relates to a clamp tray capable of fixing and releasing a work.

For example, when printing on a plurality of workpieces at the same time, when supplying workpieces to a mounting machine, or when bonding semiconductor workpieces, it is required to position and fix the workpieces with high accuracy.

Various work clamp trays have been proposed so far in order to meet such demands (for example, Patent Document 1, etc.). However, with these work clamp trays, the movable plate that clamps and positions and fixes the workpiece and the upper plate have different heights at which they abut against the workpiece, making it difficult to position and fix thin workpieces. . In addition, the portion of the workpiece where the movable plate and the upper plate abut against each other requires a predetermined strength. I had to keep it strong.

For this reason, the present applicant has proposed a thin work clamp tray that has a narrow range in the height direction in which the positioning and fixing member abuts against the work, and is capable of positioning and fixing even a thin work (Patent Document 2). The work clamp tray proposed in Patent Document 2 shown in FIG. The movable plate 8 has a plurality of positioning holes 81a for accommodating the work W, and is movable between a position where the work W is fixed and a position where the work W is released. The abutment plate 9 is welded to the lower plate 7 so as to be positioned within the positioning holes 81a, and the workpiece W is attached to the inner peripheral surface of each of the plurality of positioning holes 81a in the direction of the abutment plate 9. A biasing elastic member 81 is provided. In the conventional work clamp tray having such a configuration, when the movable plate 8 is positioned to fix the work W, the work W is positioned and fixed by the abutment plate 9 and the elastic member 81 .

JP 2006-128585 A JP 2014-82295 A

The proposed plates 6, 7, 8 and the abutment plate 9 are preferably made by photoetching. Photo-etching is a processing method in which a thin plate is etched by applying a chemical reaction or corrosive action, so that side etching (undercut) inevitably occurs on the processed end face of the plate. Specifically, as shown in FIG. 19, when the processed side surface of the plate is microscopically observed, the processed side surface of the plate is not flat, but a portion protruding toward the tip remains. Each plate shown in FIG. 19 is formed by double-sided etching. Therefore, when the work W is positioned and fixed by the abutment plate 9 and the elastic member 81, the abutment position between the abutment plate 9 and the work W and the abutment position between the elastic member 81 and the work W are microscopic. , there is a shift of Δh in the stacking direction.

In recent years, workpieces have become more compact and thinner, and there is a demand for a workpiece clamp tray that can position and fix even thinner workpieces with high accuracy. is positioned and fixed, if the abutment positions of the abutment plate 9 and the elastic member 81 with respect to the work W are deviated in the stacking direction, the work W may be lifted up.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a work clamp tray that can position and fix a work thinner than the conventional one with high accuracy without causing the work to float.

A work clamp tray according to the present invention includes an upper plate, a movable plate, and a lower plate which are stacked in this order, and the movable plate has a plurality of positioning holes for accommodating workpieces. It is possible to move between a fixed position where the work is fixed and a release position where the fixed work is released, and at least one of the upper plate and the lower plate can accommodate the work in the positioning hole. A workpiece clamp tray in which a stationary abutting portion for clamping a workpiece between the movable plate and the movable plate is arranged in the positioning hole. A contact area between the movable plate and the workpiece and a contact area between the abutment portion and the workpiece in the stacking direction are the same height area. Although the various plates described above are substantially plate-shaped members (plate members), their specific outer shape is not limited.

Further, in the above configuration, a cross-sectional shape parallel to the stacking direction of the portion of the movable plate and the abutting portion that contacts the work is a tapered shape in which one surface is inclined toward the other surface toward the tip. may be

Further, in the above configuration, the tapered shape may be a configuration in which the upstream side surface in the work accommodation direction is inclined toward the downstream side.

Moreover, in the above configuration, the abutting portion may be formed integrally with the upper plate or the lower plate.

Further, in the above configuration, the frame-shaped projection into which the movable plate can be fitted, the column-shaped projection that supports the upper plate and the lower plate at a predetermined interval, and the abutting portion may be the upper plate or the lower plate. It is good also as a structure formed integrally with the said lower side plate.

Moreover, in the above configuration, the projecting height of the abutting portion may be higher than the thickness of the movable plate.

In the above configuration, the movable plate is movable between the fixed position and the released position, in which the movable plate is formed with a fixing portion fixed to at least one of the upper plate and the lower plate, and the positioning hole. and a spring portion interposed between the fixed portion and the movable portion to urge the movable portion from the release position to the fixed position.

Further, in the above configuration, the fixed portion may have a frame shape, and the movable portion may be arranged inside the fixed portion.

Further, in the above configuration, an elastic member is provided on the inner surface of each of the positioning holes in the movable plate,
In a state in which the movable plate is moved to the fixed position, the elastic member may contact the work and urge the work toward the abutment portion.

In the work clamp tray of the present invention, since the contact area between the movable plate and the work and the contact area between the abutting portion and the work in the stacking direction are at the same height, even thinner works can be lifted. Positioning and fixing can be performed with high accuracy without

FIG. 4 is a partial cross-sectional perspective view of a housing hole of the work clamp tray and its vicinity according to the first embodiment of the present invention; It is a top view of the upper plate concerning a 1st embodiment. FIG. 3 is a cross-sectional view taken along line AA of FIG. 2; FIG. 4 is an enlarged plan view of an accommodation hole in the upper plate; FIG. 5 is a cross-sectional view taken along line BB of FIG. 4; It is a top view of a movable plate concerning a 1st embodiment. 4 is an enlarged plan view showing the structure of positioning holes of the movable plate; FIG. FIG. 8 is a cross-sectional view taken along line DD of FIG. 7; FIG. 4 is a plan view of a spacer plate; 4 is a plan view of a lower plate according to the first embodiment; FIG. FIG. 11 is an explanatory view of a method of forming an inclined surface 12a and an inclined surface 351a on the abutting portion 12 of the upper plate 1 and the contacting portion 351 of the movable plate 3 by photoetching; It is explanatory drawing of the method of forming an inclined surface in the end surface of a plate by punching and grinding. FIG. 4 is an enlarged plan view showing a housing hole of the work clamp tray according to the first embodiment and a structure in the vicinity thereof; 14 is a cross-sectional view taken along line CC of FIG. 13; FIG. 4 is a vertical cross-sectional view of a state in which a work W is positioned and fixed; FIG. FIG. 4 is a partial plan view of a long hole, a round hole, and their vicinity in the work clamp tray; FIG. 5 is a schematic cross-sectional view of a work clamp tray according to a second embodiment; FIG. 10 is a cross-sectional view showing the structure of a conventional work clamp tray; FIG. 5 is a partially enlarged cross-sectional view showing a fixed state of a work by a conventional work clamp tray.

The work clamp tray according to the present invention will be described in detail below with reference to the drawings. However, the present invention is by no means limited to these embodiments. In the following description, x, y, and z orthogonal coordinate axes are as shown in FIG. In addition, unless otherwise specified, the “planar direction” is the direction of the xy plane (the direction in which the plane of each plate member spreads), and the “stacking direction” is the z direction (the direction in which each plate member is stacked).

(First embodiment)
First, the first embodiment will be described. FIG. 1 shows a partial cross-sectional perspective view of a housing hole 11 of a work clamp tray T1 (hereinafter sometimes referred to as "clamp tray T1") according to the present embodiment and its vicinity. As shown in FIG. 1, the clamp tray T1 has a configuration in which plate members of an upper plate 1, a movable plate 3, a spacer plate 4 and a lower plate 2 are stacked in this order.

First, the configuration of each plate member will be described below with reference to FIGS. 2 to 8. FIG. First, the upper plate 1 will be described. 2 is a plan view of the upper plate 1, FIG. 3 is a sectional view taken along the line AA, FIG. 4 is an enlarged plan view of the receiving hole 11, and FIG. 5 is a sectional view taken along the line BB of FIG. As shown in these figures, the upper plate 1 has a shape obtained by cutting off one corner of a square. A plurality of rectangular housing holes 11 capable of housing a work W (shown in FIG. 1) are formed in a matrix in the x and y directions. In addition, three holes 17 are formed in the three corners of the upper plate 1 excluding the chamfered corners for positioning the upper plate 1 and the lower plate 2 when they are stuck together. . A long hole 15 and a circular hole 16 for moving the movable plate 3 are formed in the chamfered corner and the corner located opposite to the chamfered corner. A method of moving the movable plate 3 using the elongated holes 15 and the round holes 16 will be described later.

On the lower surface of the upper plate 1, a frame-shaped projection 13 is formed along the outer peripheral edge of the upper plate 1, and four columnar projections are formed at predetermined intervals in the area where the accommodation holes 11 are formed. a portion 14a, two columnar protrusions 14b formed in the region where the corners are cut off, and two adjacent sides of each of the plurality of accommodation holes 11 having an L-shaped abutment protruding downward in a plan view. a portion 12; The frame-shaped projection 13, the columnar projections 14a and 14b, and the abutting portion 12 are set higher than the thickness of the movable plate 3. As shown in FIG. As a result, the movable plate 3 can be moved smoothly. Moreover, it is desirable that the heights of the frame-shaped projection 13, the columnar projections 14a and 14b, and the abutting portion 12 are the same. As a result, bending of the upper plate 1 and the lower plate 2 can be prevented, and the interval between the plates can be kept constant.

The abutting portion 12 will be further described. FIG. 4 is an enlarged plan view of the accommodation hole 11 and its vicinity, and two adjacent sides of the accommodation hole 11 are formed with L-shaped butting portions 12 in a plan view. As can be seen from the cross-sectional view of the accommodation hole 11 shown in FIG. 5, the abutting portion 12 protrudes from the lower surface of the upper plate 1 toward the downstream side in the workpiece accommodation direction, and the surface facing the accommodation hole 11 is the downstream side in the workpiece accommodation direction. The inclined surface 12a extends inwardly of the receiving hole 11 (downward in FIG. 5). That is, the cross-sectional shape of the surface of the abutting portion 12 facing the accommodation hole 11 is tapered toward the inside of the accommodation hole 11 .

In the present embodiment, the frame-shaped projection 13, the columnar projections 14a and 14b, and the abutting portion 12 are formed integrally with the upper plate 1, so that the abutting member 12 is a separate member, and the lower side (or the upper side) Compared to conventional clamp trays that are welded to a plate, it is possible to position and fix thinner workpieces. The processing method for forming the frame-shaped projection 13, the column-shaped projections 14a and 14b, and the abutting portion 12 integrally with the upper plate 1 is not particularly limited, but such projections are formed on the upper plate 1 having a thickness of 1 mm or less. If formed, a photoetching process is preferably used. A method of forming the abutting portion 12 having the inclined surface 12a by photoetching will be described later.

Next, the movable plate 3 will be explained. FIG. 6 shows a plan view of the movable plate 3, and FIG. 7 shows an enlarged plan view of the positioning holes 34. As shown in FIG. The movable plate 3 has a shape substantially similar to that of the upper plate 1 , is smaller than the upper plate 1 , and has a shape that fits inside the frame-shaped convex portion 13 of the upper plate 1 . The movable plate 3 includes a frame-shaped fixed portion 31 having a square shape with a cut 311 formed at one corner, a square-shaped movable portion 32 housed in the frame-shaped fixed portion 31, and a movable portion 32 with the fixed portion 31. It has a plurality of spring portions 33 connected to the portion 32 .

Two holes 30 for positioning the movable plate 3 and the spacer plate 4 when the spacer plate 4 is attached are formed in the diagonal corners of the fixed portion 31 . Further, the rectangular movable portion 32 has positioning holes 34 at positions corresponding to the accommodation holes 11 formed in the upper plate 1 .

As shown in FIG. 7, two adjacent inner wall surfaces of the rectangular positioning hole 34 are provided with a first plate spring 35a for biasing the work W in the x direction and a second plate spring 35b for biasing the work W in the y direction. (both of which are elastic members) are formed integrally with the movable portion 32 . Each of the first plate spring 35a and the second plate spring 35b has a contact portion 351 that contacts the workpiece W and an elastic portion 352 that is shaped like a crank.

FIG. 8 shows a cross-sectional view taken along line DD of FIG. A side surface of the contact portion 351 that contacts the work W is an inclined surface 351a extending in the work W accommodation direction (rightward direction in FIG. 8) toward the downstream side in the work accommodation direction (downward direction in FIG. 8). That is, the cross-sectional shape of the tip portion of the contact portion 351 is tapered in the direction in which the workpiece W is accommodated.

The movable portion 32 also has a push button portion 36a and a projecting portion 36b projecting outward from opposing corners. The push button portion 36 a protrudes outward from a cut 311 of the fixing portion 31 , and the protruding portion 36 b engages with a notch portion 312 of the fixing portion 31 . A long hole 37 and a round hole 38 are formed in the push button portion 36a and the projecting portion 36b. Long holes 39a and 39b are formed at positions corresponding to the columnar projections 14a and 14b formed on the upper plate 1, respectively.

The fixed portion 31, the movable portion 32, the spring member 33, the first plate spring 35a, and the second plate spring 35b of the movable plate 3 are preferably integrally formed. When these are integrally molded, the above-described photoetching process can be preferably used. A method of forming the abutment portion 351 having the inclined surface 351a by photoetching will be described later in the same manner as the method of forming the abutment portion 12. FIG.

The spacer plate 4 will be explained. The spacer plate 4 is used for facilitating the movement of the movable plate 3 and adjusting the contact area between the contact portion 351 and the contact portion 12 and the workpiece W, and the like. The thickness of the spacer plates 4 and the number of spacer plates 4 to be used are appropriately adjusted so that these effects can be obtained. FIG. 9 shows a plan view of the spacer plate 4. As shown in FIG. The spacer plate 4 has the same planar shape as the upper plate 1 , and has openings 41 at positions corresponding to the accommodation holes 11 of the upper plate 1 and having an opening area equal to or larger than that of the accommodation holes 11 . Three corners of the spacer plate 4 excluding the chamfered corners of the spacer plate 4 are provided with holes 45 for positioning the upper plate 1 and the spacer plate 4 when they are attached to the upper plate 1 . Two holes 44 for positioning the movable plate 3 and the spacer plate 4 when the movable plate 3 and the spacer plate 4 are attached to each other are formed at the opposite corners of the spacer plate 4 . Further, the chamfered corner and the diagonal corner are formed with an elongated hole 42 and a round hole 43 for moving the movable plate 3 . In addition, the portions indicated by broken lines in FIG. 9 indicate the portions with which the columnar projections 14a and 14b of the upper plate 1 abut. The columnar protrusions 14a, 14b and the spacer plate 4 are joined at the abutting portions.

The lower plate 2 will be explained. FIG. 10 shows a plan view of the lower plate 2. As shown in FIG. The lower plate 2 has the same planar shape as the upper plate 1 and has suction holes 21 at positions corresponding to the accommodation holes 11 of the upper plate 1 . At the three corners of the lower plate 2 excluding the chamfered corners of the lower plate 2, when the upper plate 1 and the spacer plate 4 are bonded together, the upper plate 1, the spacer plate 4 and the lower side are provided. Holes 25 for positioning the plates 2 are formed respectively, and holes 24 for positioning the movable plate 3 and the lower plate 2 when the movable plates 3 are attached to each other are formed in the opposing corners of the lower plate 2 . are formed two each. Further, the chamfered corner and the diagonal corner are formed with an elongated hole 22 and a round hole 23 for moving the movable plate 3 .

FIG. 11 shows a method of forming the inclined surface 12a and the inclined surface 351a on the contact portion 12 of the upper plate 1 and the contact portion 351 of the movable plate 3 by photoetching. First, a photoresist etching pattern EP is formed on the front and back surfaces of a plate P made of stainless steel or the like (FIG. 11(a)). In this figure, the etching pattern EP on the front side and the back side has an opening portion AP1 and an opening portion AP2. A conventionally known method can be used as a method for forming the etching pattern EP using a photoresist. What is important here is that the size of the opening AP1 of the etching pattern formed on the upper surface of the plate P and the size of the opening AP2 of the etching pattern formed on the lower surface of the plate P are different. In the form shown in FIG. 11, the opening AP1 of the etching pattern on the upper surface of the plate is set larger than the opening AP2 of the etching pattern on the lower surface of the plate. The longer the horizontal distance (the difference between the front and back) between the opening ends of the etching patterns formed on the front and back surfaces of the plate P, the longer the inclined surface formed on the opening side surface of the plate P and the smaller the inclination angle.

Next, an etchant is sprayed onto the plate P on which the photoresist etching pattern EP is formed. The portion not masked by the photoresist, that is, the portion where the plate P is exposed is dissolved and removed by the etchant (FIG. 11(b)).

As shown in FIG. 11(b), since the openings AP1 and AP2 of the etching patterns EP formed on the front and back surfaces of the plate P are different in size, the degree of dissolution of the front and back surfaces of the plate P by the etchant is different. As a result, the side surface of the opening OP formed in the plate P becomes an inclined surface SL extending inward from the opening OP from the upper surface to the lower surface (FIG. 11(c)). If the opening AP2 of the etching pattern EP formed in the plate P is made larger than the opening AP1, the inclined surfaces of the side surfaces of the opening OP shown in FIG. It becomes a sloping surface extending in the direction.

Finally, the etching pattern EP formed on the front and rear surfaces of the plate P is removed, and the plate P having the opening OP with the side surfaces having the inclined surfaces SL is obtained.

On the other hand, when the thickness of the plate P exceeds, for example, 1 mm, it is possible to form an inclined surface on the end face of the plate P by punching, grinding, or the like, in addition to photoetching. An example is shown in FIG. First, an opening OP is formed at a predetermined position of the plate P by punching (FIGS. 12(a) and 12(b)). Next, the inner side surface of the opening OP is ground by a rotating inverted cone-shaped grindstone Gd to form an inclined surface SL (FIG. 12(c)). As a processing method for forming the opening OP in the plate P, etching, laser processing, wire processing, etc. can be used in addition to the punching processing. A surface SL may be formed.

Next, assembly of the clamp tray T1 of the present invention will be described. First, the spacer plate 4 is overlaid on the lower plate 2 . Then, the three holes 45 of the spacer plate 4 and the three holes 25 of the lower plate 2 are made to overlap in the vertical direction, and pins (not shown) are fitted into these holes to connect the spacer plate 4 and the lower plate 2 together. and are positioned. A predetermined position of the spacer plate 4 is joined to the lower plate 2 . For joining, for example, a conventionally known joining method such as spot welding or fastening with screws can be used.

After that, the movable plate 3 is overlaid on the spacer plate 4 . Then, the four holes 30 of the movable plate 3, the four holes 44 of the spacer plate 4, and the four holes 24 of the lower plate 2 are made to overlap in the vertical direction, and pins (not shown) are fitted into these holes. The movable plate 3, the spacer plate 4, and the lower plate 2 are positioned. A predetermined position of the fixed portion 31 of the movable plate 3 is joined to the spacer plate 4 . For joining, as described above, a conventionally known joining method such as spot welding can be used.

Next, the upper plate 1 is overlaid on the spacer plate 4 to which the movable plate 3 is joined. The three holes 17 of the upper plate 1, the three holes 45 of the spacer plate 4, and the three holes 25 of the lower plate 2 are made to overlap vertically, and pins (not shown) are fitted into these holes. An upper plate 1, a spacer plate 4 and a lower plate 2 are positioned. At this time, the frame-shaped protrusion 13 formed on the lower surface of the upper plate 1 abuts against the spacer plate 4 , and the movable plate 3 is accommodated in the area surrounded by the frame-shaped protrusion 13 . Also, the columnar projections 14a and 14b of the upper plate 1 pass through the elongated holes 39a and 39b formed in the movable plate 3 and come into contact with the spacer plate 4. As shown in FIG. A gap between the inner circumference of the elongated holes 39a and 39b and the outer circumference of the columnar projections 14a and 14b is set wider than the amount of movement of the movable portion 32 of the movable plate 3. As shown in FIG. In other words, the sizes of the elongated holes 39a and 39b are set to sizes that do not cause interference between the movable portion 32 and the columnar protrusions 14a and 14b as the movable portion 32 moves. Therefore, the columnar projections 14a and 14b do not hinder the movement of the movable portion 32. As shown in FIG. The abutment portions 12 formed in the housing holes 11 of the upper plate 1 also pass through the positioning holes 34 of the movable portion 32 and come into contact with the spacer plate 4 . Then, the upper plate 1 and the lower plate 2 are joined at predetermined positions.

Next, fixing and releasing of the workpiece W by the clamp tray T1 having such a configuration will be described. FIG. 13 shows a plan view of the accommodation hole 11 of the clamp tray T1 and its vicinity, and FIG. 14 shows a sectional view taken along line CC of FIG. The movable portion 32 of the movable plate 3 is normally located at a position where the workpiece W is fixed. At this time, the push button portion 36a (shown in FIG. 6) protrudes outward from the chamfered corners of the upper plate 1 and the lower plate 2. As shown in FIG. In this state, at least a portion of the contact portion 351 of the first leaf spring 35a and the second leaf spring 35b is exposed from the housing hole 11 of the upper plate 1. As shown in FIG.

Next, when positioning and fixing the work W on the clamp tray T1, force is applied to the push button portion 36a (shown in FIG. 6) to push it inward of the clamp tray T1 against the biasing force of the spring member 33. . Then, the movable portion 32 formed integrally with the push button portion 36a moves, and the contact portion 351 of the first leaf spring 35a and the second leaf spring 35b moves to a position where it cannot be seen from the accommodation hole 11 of the upper plate 1. . As a result, the workpiece W can be accommodated in the accommodation hole 11 . Next, the work W is accommodated in the accommodation hole 11 and the positioning hole 34 . The accommodation hole 11 is formed larger than the standard outer shape of the work W in consideration of variations in size of the work W. As shown in FIG. Therefore, at this stage, the accommodated work W is not positioned and fixed.

Next, when the force applied to the push button portion 36a is released, the biasing force of the spring member 33 causes the movable portion 32 to move in the direction in which the push button portion 36a protrudes outward. At this time, the contact portion 351 of the first plate spring 35a and the second plate spring 35b contacts the work W, and moves the work W toward the abutting portion 12 of the upper plate 1. As shown in FIG. The workpiece W is positioned, clamped and fixed by the abutting portion 351 and the abutting portion 12 of the first leaf spring 35a and the second leaf spring 35b. At this time, the movable plate 3 is in a fixing position where the accommodated work W is pressed and fixed.

FIG. 15 shows a vertical cross-sectional view of a state in which the workpiece W is positioned and fixed by the abutting portion 351 and the abutting portion 12 of the first leaf spring 35a and the second leaf spring 35b. The workpiece W is clamped and fixed between the tip of the inclined surface 351 a of the contact portion 351 and the tip of the inclined surface 12 a of the abutting portion 12 . Both the movable plate 3 and the upper plate 1 on which the contact portions 351 are formed are positioned on the upper surface of the spacer plate 4 . Both the inclined surface 351a of the contact portion 351 and the inclined surface 12a of the abutment portion 12 have a cross-sectional shape extending downward and inward of the housing hole 11. The area of contact with W and the area of contact between the abutting portion 12 and the workpiece W are the same area in the vertical direction of FIG. As a result, even if the work W is thin in the vertical direction, the work can be positioned and fixed with high precision without being lifted.

Next, a procedure for removing the positioned and fixed workpiece W from the housing hole 11 will be described. When the work W that has been positioned and fixed is taken out from the housing hole 11, the push button portion 36a (shown in FIG. 6) is pushed inwardly of the clamp tray T1. As a result, the movable portion 32 moves in the same direction, and the clamping of the work W by the abutment portion 351 and the abutment portion 12 of the first leaf spring 35a and the second leaf spring 35b is released, and the work W can be taken out. It becomes possible. At this time, the movable plate 3 is at the release position where the fixed workpiece W is released.

It should be noted that the fixing and releasing of the workpiece W can also be performed using a long hole or round hole formed in the clamp tray T1. As described above, the upper plate 1, the lower plate 2, the movable plate 3, and the spacer plate 4 are formed with elongated holes 15, 37, 22, 42 and round holes 16, 38, 23, 43. . The elongated holes 15, 22, 42 and the round holes 16, 23, 43 of the upper plate 1, the lower plate 2 and the spacer plate 4 are formed at positions that completely match each other when viewed from above. On the other hand, the elongated hole 37 and round hole 38 of the movable portion 32 of the movable plate 3 are slightly displaced in the upper right direction in FIG. formed in position.

FIG. 16 shows a partial plan view of the oblong hole, the round hole, and the vicinity thereof in the clamp tray T1. When the clamp tray T1 is assembled, the elongated holes 15, 22 and round holes 16, 23 of the upper plate 1 and the lower plate 2 are completely matched in plan view. On the other hand, the elongated hole 37 and the round hole 38 of the movable portion 32 of the movable plate 3 are slightly shifted in the upper right direction from the elongated holes 15, 22 and the round holes 16, 23 of the upper plate 1 and the lower plate 2. . Therefore, the movable portion 32 of the movable plate 3 is partially exposed from the long holes 15 and 22 and the round holes 16 and 23 of the upper plate 1 and the lower plate 2 .

When the workpiece W is fixed using the elongated holes or round holes formed in the clamp tray T1, the elongated holes 15, 22, 42 and the round holes 16, 23, 16, 23, 42 of the upper plate 1, the lower plate 2 and the spacer plate 4 are used. A pin (not shown) is inserted into 43, and the movable portion 32 exposed from the elongated holes 15, 22, 42 and the round holes 16, 23, 43 is inserted into the elongated holes 15, 22, 42 and the round holes 16, 23, 43. It is moved to a position where it cannot be seen from 43. As a result, the workpiece W can be accommodated in the accommodation hole 11 . Next, the work W is accommodated in the accommodation hole 11 and the positioning hole 34 . Thereafter, pins (not shown) are pulled out from the long holes 15, 22, 42 and the round holes 16, 23, 43. Then, the movable portion 32 is moved in the upper right direction in FIG. 6 by the urging force of the spring member 33, and the workpiece W is positioned by the abutting portion 351 and the abutting portion 12 of the first leaf spring 35a and the second leaf spring 35b. It is clamped and fixed at the same time.

On the other hand, when releasing the work W, pins (not shown) are inserted into the long holes 15, 22, 42 and round holes 16, 23, 43 of the upper plate 1, the lower plate 2, and the spacer plate 4 to The movable part 32 exposed from the holes 15, 22, 42 and the round holes 16, 23, 43 is moved to a position where it cannot be seen from the elongated holes 15, 22, 42 and the round holes 16, 23, 43. As a result, the clamping of the workpiece W by the contact portion 351 of the first plate spring 35a and the contact portion 351 of the second plate spring 35b and the contact portion 12 is released, and the workpiece W can be taken out from the housing hole 11. FIG. It should be noted that it is also possible to fix and release the workpiece W using either one of the elongated holes and the round holes. Also, the number of holes for fixing and releasing the workpiece W may be one or two or more.

(Second embodiment)
Next, a second embodiment will be described. In the following description, emphasis will be placed on the description of portions different from the first embodiment, and descriptions of common portions may be omitted.

FIG. 17 shows a schematic cross-sectional view of a work clamp tray T2 according to the second embodiment. In the work clamp tray T1 according to the first embodiment, the abutment portions 12 are formed integrally with the upper plate 1, but in the work clamp tray T2 according to the second embodiment, the abutment portions 5 are formed separately from the upper plate 1. It is manufactured and attached to a predetermined position of the spacer plate 4 . The side surface (the left side surface in FIG. 17) of the abutting portion 5 that contacts the workpiece W is an inclined surface 5a having a cross-sectional shape that extends downward and inwardly of the housing hole 11 . Therefore, as in the work clamp tray T1 of the first embodiment, when the work W is clamped and fixed between the abutting portion 351 and the abutting portion 5, the abutment region and the abutting portion between the abutting portion 351 and the work W The contact area between 5 and the work W is the same in the vertical direction in FIG. 17, and even if the work W is thin in the vertical direction, it is possible to position and fix the work with high accuracy without lifting the work.

(others)
When each of the plates described above is processed by etching, the plate material is corrosive to the etchant, and metal materials such as stainless steel, iron, copper, and aluminum are preferably used.

Also, the suction holes 21 formed in the lower plate 2 are not limited to a circular shape, and may be polygonal or the like. The number of suction holes 21 formed is not limited to one, and may be two or more. Also, the suction hole 21 may be omitted. Furthermore, a hole having the same shape as the accommodation hole 11 of the upper plate 1 may be formed instead of the suction hole 21 . When such a hole is formed, it becomes possible to fix a workpiece W that is long in the z direction.

INDUSTRIAL APPLICABILITY The present invention is applicable to work clamp trays for clamping various types of works.

Reference Signs List 1 upper plate 2 lower plate 3 movable plate 4 spacer plate 5 abutment portion 5a inclined surface T1, T2 work clamp tray W workpiece 11 accommodation hole 12 abutment portion 12a inclined surface 13 frame-shaped convex portion 14a, 14b columnar convex portion 15 Long hole 16 Round hole 21 Suction hole 22 Long hole 23 Round hole 31 Fixed part 32 Movable part 33 Spring member 34 Positioning hole 35a First plate spring (elastic member)
35b Second leaf spring (elastic member)
37 elongated hole 38 round hole 42 elongated hole 43 round hole 351 contact portion 351a inclined surface 352 elastic portion

Claims (8)

The upper plate, the movable plate, and the lower plate are stacked in this order,
The movable plate has a plurality of positioning holes for accommodating workpieces, and is movable between a fixed position for fixing the accommodated workpieces and a release position for releasing the fixed workpieces,
At least one of the upper plate and the lower plate is formed with an accommodation hole that allows accommodation of the workpiece in the positioning hole,
A workpiece clamp tray in which a stationary abutting portion for clamping a workpiece between itself and the movable plate is arranged in the positioning hole by positioning the movable plate at a position where the workpiece is fixed,
The contact area between the movable plate and the workpiece and the contact area between the abutting portion and the workpiece in the stacking direction are the same height area.the law of nature,
A cross-sectional shape parallel to the stacking direction of the portion of the movable plate and the abutting portion that contacts the work is a tapered shape in which one surface is inclined toward the other surface toward the tip. A work clamp tray characterized by: 2. A workpiece clamp tray according to claim 1 , wherein said tapered shape is such that an upstream side surface in a workpiece accommodating direction is inclined toward a downstream side. 3. A work clamp tray according to claim 1, wherein said abutting portion is formed integrally with said upper plate or said lower plate. A frame-shaped projection into which the movable plate can be fitted, a columnar projection that supports the upper plate and the lower plate at a predetermined interval, and the abutting portion are integrated with the upper plate or the lower plate. 3. The work clamp tray according to claim 1 or 2 , which is formed in 5. The work clamp tray according to any one of claims 1 to 4 , wherein the projecting height of the abutting portion is higher than the thickness of the movable plate. The movable plate is
a fixing part fixed to at least one of the upper plate and the lower plate;
a movable part that is formed with the positioning hole and is movable between the fixed position and the released position;
a spring portion interposed between the fixed portion and the movable portion and biasing the movable portion from the released position to the fixed position;
The work clamp tray according to any one of claims 1 to 5 , having 7. A work clamp tray according to claim 6 , wherein said fixed portion has a frame shape, and said movable portion is disposed within said fixed portion. An elastic member is provided on the inner surface of each of the positioning holes in the movable plate,
8. The work clamp tray according to any one of claims 1 to 7 , wherein in a state in which the movable plate is moved to the fixed position, the elastic member abuts against the work and urges the work toward the abutment portion.

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