JP2013154408A - Level adjustment jig, plate material holding device having the level adjustment jig, and method of adjusting arrangement of plate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a level adjustment tool enabling the adjustment of the orientation of a plate material while the plate material is fixed to a support base, and to provide a plate material holding device and a method of adjusting the arrangement of the plate material.SOLUTION: A level adjustment tool 10 used for fixing a plate material 11 to a support base 12 includes a base member 14 at which a screw hole 16 is formed and which is fixed to the support base 12, a holding member 15 in which a through-hole 29 and a screw hole 30 are formed, and which is attached to the base member 14 and holds the plate material 11, a first screw 32 the tip of which is fitted to the screw hole 16 in a state of being inserted through the through-hole 29, and the head of which is brought into contact with the holding member 15, and a second screw 33 which is fitted to the screw hole 30 and the tip of which is brought into contact with the base member 14. An angle of the plate material 11 relative to the support base 12 is changed by adjusting the projecting length of the tip of the first screw 32 from the through-hole 29 and the projecting length of the tip of the second screw 33 from the screw hole 30.

Description

The present invention relates to a level adjusting jig, a plate material holding device, and a plate material arrangement adjusting method for holding a plate material as a workpiece in a predetermined direction.

In wire electric discharge machining, milling, or the like, it is important to hold the workpiece in a predetermined orientation in order to keep the machining accuracy at a high level.
When the workpiece is a plate material, the plate material is generally fixed to a table by a jig, and a specific example is described in Patent Document 1.
If the orientation of the plate material is not within the allowable range with respect to the reference arrangement, the orientation of the plate material can be finely adjusted by sandwiching the shim tape between the plate material and the base.

JP 2010-105074 A

However, when using shim tape, it is necessary to repeat the work of attaching the plate material to the table after the plate material is removed from the table and placing the shim tape, and measuring the direction of the plate material, and it takes time to fine-tune the plate material direction. There was a problem.
The present invention is made in view of such circumstances, and a level adjustment jig capable of adjusting the orientation of the plate material in a state in which the plate material is fixed to the support base, and a plate material holding device including the level adjustment jig and the arrangement adjustment of the plate material It aims to provide a method.

A level adjusting jig according to the first invention that meets the above-mentioned object is a level adjusting jig used for fixing a plate material to a support base, and is formed with a screw hole A and fixed to the support base. A member, a through hole and a screw hole B are formed, attached to the base member, and a holding member for sandwiching the plate material; and a tip portion is fitted into the screw hole A in a state of being inserted through the through hole; A first screw having a head abutting against the holding member; and a second screw fitted into the screw hole B and having a tip abutting against the base member, the tip of the first screw By adjusting the projecting length from the through hole and the projecting length from the screw hole B at the tip of the second screw, the angle of the plate member with respect to the support base is changed.

In the level adjusting jig according to the first invention, the holding member is formed by a plate material holder attached to the base member and a vertically long guide hole, and a third screw inserted through the guide hole. A plate retainer fixed to the plate retainer and capable of moving back and forth along the guide hole by loosening the third screw, and the plate retainer and the plate retainer at the forward position It is preferable that the plate material is made removable by holding the plate and retracting the plate material retainer.

In the level adjusting jig according to the first aspect of the present invention, the plate material presser includes a press plate in which the guide hole and the screw hole C are formed, and a front end portion of the plate material presser that is fitted into the screw hole C and contacts the plate material. Preferably, the first, second, and fourth screws are bolts that can be rotated by a common wrench.

A plate material holding device according to a second invention that meets the above object is a plate material holding device having a support base and a level adjustment jig for fixing the plate material to the support base, the level adjustment jig having a screw hole. A is formed, a base member fixed to the support base, a through hole and a screw hole B are formed, a holding member that is attached to the base member and sandwiches the plate material, and a state in which the through hole is inserted The first end is fitted into the screw hole A, the head is brought into contact with the holding member, and the second screw is fitted into the screw hole B and the tip is brought into contact with the base member. And adjusting the projecting length of the tip end portion of the first screw from the through hole and the projecting length of the tip end portion of the second screw from the screw hole B, respectively. The angle of the plate is changed.

In the plate material holding apparatus according to a second aspect of the present invention, the holding member is formed of a plate material receiving member attached to the base member, and a long screw guide hole, and a third screw inserted through the guide hole. A plate retainer fixed to the retainer and capable of advancing and retreating along the guide hole by loosening the third screw, and the plate member is held by the plate retainer in the advanced position and the plate retainer. It is preferable that the plate material is made removable by sandwiching and retreating the plate material presser.

In the plate material holding device according to the second invention, it is preferable that there are at least three level adjustment jigs, and at least one of the level adjustment jigs is not collinear with other level adjustment jigs.

The plate material arrangement adjusting method according to the third aspect of the present invention adjusts the arrangement of the uneven plate attached to the support base and reduces the displacement of the uneven surface of the plate relative to the reference plane. An adjustment method, in which 1) a screw hole A is formed and a base member fixed to the support base, and 2) a through hole and a screw hole B are formed, attached to the base member, and sandwiching the plate material 3) a first screw whose tip is fitted into the screw hole A with the through-hole inserted, and a head that is in contact with the holding member; and 4) a screw that fits into the screw hole B. The at least three level adjusting jigs having the second screw with the tip part contacting the base member, and at least one of the level adjusting jigs is not collinear with the other level adjusting jigs. In the arrangement, fixed to the support base, and less The plate member is sandwiched by the holding members of the three level adjustment jigs, the plate member is attached to the support base, the displacement of the uneven surface of the plate member with respect to the reference plane is measured, and the at least three level adjustment jigs are measured. Adjusting the protrusion length of the tip end portion of the first screw from the through hole and the protrusion length of the tip end portion of the second screw from the screw hole B with respect to all or part of the tool. The angle of the plate material with respect to the base is changed to minimize the displacement of the uneven surface of the plate material with respect to the reference plane.

The level adjusting jig according to the first invention and the plate material holding device according to the second invention are the projection length from the through hole of the tip of the first screw of the level adjusting jig and the tip of the second screw. By adjusting the protrusion length from each screw hole B and changing the angle of the holding member with respect to the base member, the angle of the plate can be adjusted while the plate is fixed to the holding member, and the direction of the plate is efficiently adjusted. It is possible.

In the level adjusting jig according to the first invention and the plate material holding device according to the second invention, the holding member is fixed to the plate material holder by a third screw formed with a vertically long guide hole and inserted through the guide hole. A plate retainer that can be advanced and retracted along the guide hole by loosening the third screw, sandwiching the plate by the plate retainer and the plate support in the advanced position, and retreating the plate retainer When the plate material is made removable by this, it is not necessary to divide the level adjustment jig when removing the plate material from the level adjustment jig, and loss of the parts of the level adjustment jig can be prevented.

In the level adjustment jig according to the first invention, when the first and second screws are bolts that can be rotated by a common wrench, the angle of the plate can be adjusted by one wrench, and the angle adjustment work It is possible to shorten the time. Further, when the fourth screw is also a bolt that can be rotated by a wrench common to the first and second screws, the wrench used to fix the plate material can also be used for adjusting the angle of the plate material. It is possible to improve efficiency.

In the plate material holding device according to the second invention, when there are at least three level adjusting jigs and at least one level adjusting jig is not collinear with other level adjusting jigs, the level adjusting jig is operated. Only by this, the inclination of the plate material with respect to the support base can be freely changed in any direction, and the angle of the plate material can be easily adjusted.

According to a third aspect of the present invention, there is provided a plate material arrangement adjusting method in which at least three level adjustment jigs are fixed to a support base in such an arrangement that at least one level adjustment jig is not collinear with other level adjustment jigs. , Holding the plate material by holding members of at least three level adjustment jigs, attaching the plate material to the support base, measuring the displacement of the uneven surface of the plate material with respect to the reference plane, and all or part of at least three level adjustment jigs The protrusion length from the through hole of the tip portion of the first screw and the protrusion length from the screw hole B of the tip portion of the second screw are respectively adjusted to change the angle of the plate material with respect to the support base, and to the reference plane Minimize the displacement of the uneven surface of the plate. Accordingly, the angle of the plate material with respect to the support base can be changed in a state where the plate material is attached to the holding member, and the displacement of the uneven surface of the plate material with respect to the reference plane can be efficiently minimized.

(A), (B) is the perspective view and top view of a level adjustment jig which concern on one embodiment of this invention, respectively. (A) and (B) are the side view and front view of the same level adjustment jig, respectively. It is a side view of the modification of a level adjustment jig. It is a perspective view of the modification of a level adjustment jig. It is explanatory drawing of the state which fixed the board | plate material with the board | plate material holding | maintenance apparatus.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1, 2, and 5, a level adjustment jig 10 according to an embodiment of the present invention is used to fix a plate material 11 to a support base 12 and is fixed to the support base 12. It has a base member 14 and a holding member 15 that sandwiches the plate material 11.
Details will be described below.

As shown in FIGS. 1A and 1B and FIGS. 2A and 2B, the level adjusting jig 10 includes a plate-like base member 14 in which a screw hole 16 (screw hole A) is formed. And a holding member 15 attached to the base member 14 by screws 17 and 18.
The base member 14 has a rectangular shape in plan view, and has vertically long through holes 19 and 20 formed on the left and right sides. The base member 14 is attached to the support base 12 by a screw 21 that passes through the through hole 19 and a screw 22 that passes through the through hole 20. It is fixed. The through holes 19 and 20 are parallel.
In the present embodiment, the screw hole 16 does not penetrate the base member 14, but may be designed to penetrate the base member 14.

The holding member 15 includes a plate material holder 23 attached to a central portion (between the through hole 19 and the through hole 20) of the base member 14 by screws 17, 18; a screw 24 (third screw); and a screw 25 (first screw). 3) and a plate holder 26 fixed to the plate holder 23 by a screw 3).
The plate material receiver 23 is connected to a rectangular plate portion 27 whose one side (rear side) is fixed to the upper surface of the base member 14 by screws 17 and 18, and to the other side (front side) of the rectangular plate portion 27. 27 is provided with an L-shaped portion 28 integrated with 27.
The rectangular plate portion 27 is formed in a plate shape and has a rectangular shape in plan view. The L-shaped portion 28 is formed in an L shape when viewed from the side.

As shown in FIGS. 2A and 2B, a through hole 29 and a screw hole 30 (screw hole B) are formed on the other side of the rectangular plate portion 27 to which the screws 17 and 18 are attached on one side. ing.
The through hole 29 is arranged immediately above the screw hole 16 in a state where the plate material holder 23 is attached to the base member 14 by the screws 17 and 18. The screw hole 30 is formed so as to penetrate the rectangular plate portion 27 up and down.

As shown in FIGS. 1A and 1B and FIGS. 2A and 2B, a screw 32 (first screw) is inserted into the through-hole 29 from above, and the screw 32 is connected to the head. Is in contact with the rectangular plate portion 27, and the tip portion protrudes downward from the rectangular plate portion 27. The tip of the screw 32 protruding from the rectangular plate portion 27 is fitted (screwed) into the screw hole 16.
A screw 33 (second screw) is fitted into the screw hole 30 from above, and the tip of the screw 33 protrudes downward from the rectangular plate portion 27, and the protruding tip is in contact with the base member 14. Yes.

The distance between the other side of the rectangular plate portion 27 to which the screws 17 and 18 are attached on one side and the base member 14, that is, the angle of the holding member 15 with respect to the base member 14 is the length of the protrusion of the screw 32 from the through hole 29 And it adjusts with the protrusion length from the screw hole 30 of the front-end | tip part of the screw 33. FIG. Specifically, the other side of the rectangular plate portion 27 moves away from the base member 14 when the protruding lengths of the screws 32 and 33 from the rectangular plate portion 27 become longer, and the screws 32 and 33 move away from the rectangular plate portion 27. When the protruding length is shortened, the base member 14 is approached.

In the present embodiment, nothing is disposed between the rectangular plate portion 27 of the plate material holder 23 and the base member 14, but as shown in FIG. A washer 31 attached to the screws 17 and 18 may be disposed between the members 14.
By providing the washer 31, the movable region of the rectangular plate portion 27 of the plate material holder 23 relative to the base member 14 can be widened.

The plate material retainer 26 includes a retainer plate 36 in which vertically long guide holes 34 and 35 are formed, and a screw 37 (fourth screw) attached to the retainer plate 36.
Screws 24 and 25 are inserted into the vertically long guide holes 34 and 35 arranged in parallel, and the screws 24 and 25 are fitted into screw holes (not shown) formed in the rectangular plate portion 27. Between the presser plate 36 and the plate material holder 23, a cylindrical member 38 into which the screw 24 is inserted and a cylindrical member 39 into which the screw 25 is inserted are arranged, and the interval between the presser plate 36 and the plate member holder 23 is set as a cylindrical member. A predetermined length is maintained by 38 and 39.
The plate material holder 26 is fixed to the plate material holder 23 by turning the screws 24 and 25 in the tightening direction, and can be advanced and retracted along the guide holes 34 and 35 by loosening the screws 24 and 25.

A screw hole 41 (screw hole C) into which the screw 37 is fitted is formed in the holding plate 36 between the guide holes 34 and 35 (see FIG. 2B). The screw hole 41 is formed so as to penetrate the presser plate 36 in the vertical direction, and the tip end portion of the screw 37 protrudes downward from the presser plate 36.
The holding member 15 holds the plate material 11 between the distal end portion of the screw 37 and the L-shaped portion 28 of the plate material receiving member 23 in a state where the plate material holding device 26 is fixed to the plate material receiving device 23 by the screws 24 and 25 at the advanced position. .

The tubular members 38 and 39 are replaced with tubular members having different lengths from the tubular members 38 and 39 according to the thickness of the plate member 11.
When the tubular members 38 and 39 are replaced with a tubular member shorter than the tubular members 38 and 39, depending on the length of the tubular member, the respective distal end portions of the screws 24 and 25 protrude downward from the rectangular plate portion 27. The base member 14 includes an opening (not shown) at a position directly below the screws 24 and 25 so that the tip portions of the screws 24 and 25 protruding from the rectangular plate portion 27 do not interfere with the base member 14.

The presser plate 36 has a notch 42 at the rear center. Therefore, the presser plate 36 is retracted in a state in which a tube member shorter than the tube members 38 and 39 is used instead of the tube members 38 and 39 and the presser plate 36 and the head of the screw 33 are arranged at the same height position. At this time, the presser plate 36 and the screw 33 can be prevented from interfering with each other.
Then, instead of the tubular members 38 and 39, a tubular member shorter than the tubular members 38 and 39 is used, and the presser plate 36 is retracted in a state in which the plate member holder 23 and the tip of the screw 37 are arranged at the same height. In order to avoid interference between the plate material holder 23 and the screw 37, a notch 43 is formed at the upper center of the plate material holder 23.

In this embodiment, hexagon socket head cap screws are used for the screws 17, 18, 21, 22, 24, 25, 32, 33, and 37. Among these, the screws 32, 33, and 37 have the same hexagonal hole size, so that the operator can rotate the screws 32, 33, and 37 with a common wrench. In particular, since the screws 32 and 33 are rotated when the angle of the plate member 11 is adjusted, the use of a common wrench is effective for improving the angle adjustment work of the plate member 11.

As the level adjustment jig, a holding member that is partially different from the holding member 15 is selected in accordance with the position where the level adjustment jig is attached to the support 12.
While the level adjustment jig 10 holds the plate material 11 at a position higher than the lower end of the base member 14, the level adjustment jig 50 shown in FIG. The plate member 11 is held at a position where the lower end portion of the base member 14 is lower than the lower end portion of the base member 14.
Hereinafter, the level adjusting jig 50 will be described. In addition, about the component same as the level adjustment jig | tool 10, description of a one part number and detailed description are abbreviate | omitted.

The level adjustment jig 50 differs from the level adjustment jig 10 in the shape of the plate material holder and the length of the fourth screw.
The plate material holder 51 provided in the level adjusting jig 50 includes an L-shaped portion 52 that is longer than the L-shaped portion 28 in the vertical direction. A screw 53 (fourth screw) longer than the screw 37 is fitted to the holding plate 36, and the plate material 11 is sandwiched between the screw 53 and the L-shaped portion 52.

There is no cylindrical material between the presser plate 36 and the plate material holder 51, and the presser plate 36 is fixed to the plate material holder 51 by screws 24 and 25 in a state where it is in contact with the plate material holder 51.
As a result, the plate member 11 sandwiched between the screw 53 and the L-shaped portion 52 is held at a position where the lower end portion of the plate member 11 is lower than the lower end portion of the base member 14.

As shown in FIG. 5, the support base 12 to which the plate material 11 is fixed by the level adjusting jigs 10 and 50 includes pedestals 60, 61, 62 and a long plate 63 spanned between the pedestals 60, 62. .
Each of the pedestals 60, 61, and 62 is rectangular in plan view, and a plurality of screw holes 65 are formed on the upper surface. The level adjusting jig 10 is fixed to the base 60, the base 61, or the base 62 by fitting the screws 21 and 22 into the screw holes 65. The positional relationship between the base member 14 and the base 60 or the base 61 or the base 62 is adjusted by the position of the screw 21 in the through hole 19 and the position of the screw 22 in the through hole 20.
2A and 2B show a state in which the level adjusting jig 10 is fixed to the pedestal 60. FIG.

The pedestal 61 has one side in contact with the pedestal 60 and the other side in contact with the pedestal 62, and the pedestal 60 and the pedestal 62 are kept parallel in plan view.
The long plate 63 spanned between the pedestals 60 and 62 is fixed to the pedestals 60 and 62 in a state of being arranged in parallel with the pedestal 61 in plan view. A plurality of screw holes 66 are formed in the long plate 63, and the level adjusting jig 50 is fixed to the long plate 63 by fitting the screws 21 and 22 into the screw holes 66.

The rectangular plate member 11 includes a level adjusting jig 10 in which three of the four straight portions 67 forming the outer periphery are fixed to the pedestal 60, a level adjusting jig 10 and a pedestal 62 fixed to the pedestal 61, respectively. It is supported by a level adjusting jig 10 fixed to. Further, the remaining one straight portion 67 of the plate member 11 is supported by a level adjusting jig 50 fixed to the long plate 63.
And the board | plate material holding | maintenance apparatus 69 which fixes the board | plate material 11 is mainly comprised by the support stand 12 and the level adjustment jigs 10 and 50. FIG.

The support base 12 has a structure suitable for performing wire electric discharge machining with the lower position of the long plate 63 opened. This is because it is necessary to secure a movable area such as a pipe or wiring for connecting the part of the processing machine that moves under the plate 11 and the part of the processing machine that is away from the support base 12 to the support base 12. It depends.
The plate member 11 has a plurality of through holes 68 through which wires are inserted when the plate member 11 is processed.

Further, in the level adjustment jig 10 (the same applies to the level adjustment jig 50), low-head bolts are used for the screws 24 and 25, and the level adjustment jig 10 is designed to have a low height. This is because when the height of the level adjusting jigs 10 and 50 is lowered, the portion of the processing machine that moves at the upper position of the plate material 11 can be brought close to the plate material 11, and the processing accuracy of wire electric discharge machining can be increased. This is possible.

The number of level adjusting jigs 10 fixed to each of the pedestals 60, 61, 62, the number of level adjusting jigs 50 fixed to the long plate 63, and the attachment positions of the long plates 63 to the pedestals 60, 62 are as follows: It can be changed according to the size and shape of the plate material fixed to the support base 12.
For example, when fixing a plate material having a width narrower than that of the plate material 11, the number of level adjusting jigs 10 attached to each of the pedestals 60 and 62 is set to two, and the long plate 63 is positioned close to the pedestal 61. Fixed.
However, in order to adjust the inclination of the plate material in any direction by operating only the level adjustment jig, it is necessary to attach at least three level adjustment jigs to the support base 12, and It is necessary that at least one level adjustment jig is not arranged on the same straight line as other level adjustment jigs.

Here, the plate member 11 is manufactured so that both surfaces are flat. However, in actuality, the plate member 11 has unevenness on the surface of the plate member 11 due to the manufacturing accuracy of the plate member 11 (this uneven surface is referred to as the uneven surface). Hereinafter referred to as “uneven surface”).
In the wire electric discharge machining of the plate material 11, the accuracy of the wire electric discharge machining can be increased as the total amount of displacement of the uneven surface of the plate material 11 with respect to the reference plane (hereinafter simply referred to as “displacement of the uneven surface of the plate material 11”) is reduced. Therefore, it is important to minimize the displacement of the plate 11 with respect to the reference plane.

Hereinafter, a method for reducing the displacement of the uneven surface of the plate 11 attached to the support base 12 with respect to the reference plane will be described.
(1) At least three level adjustment jigs (meaning that the total of the level adjustment jigs 10 and 50 is at least three) are provided on the support base 12, and at least one level adjustment jig has another level adjustment. Fix it so that it is not on the same straight line as the jig.
(2) The plate material 11 is sandwiched by the holding members of the at least three level adjusting jigs, and the plate material 11 is attached to the support base 12.

(3) Measure the displacement of the concavo-convex surface of the plate 11 with respect to the reference plane (horizontal plane in the present embodiment). Specifically, the position of the uneven surface of the plate material 11 is measured at a plurality of locations on the uneven surface of the plate material 11 using a dial gauge or a non-contact type distance meter, and the distance between the measured position and the reference plane is calculated. And the displacement of the uneven surface of the plate 11 is measured.
(4) Based on the measured displacement of the concavo-convex surface of the plate member 11 with respect to the reference plane, the screws 32 and 33 are rotated for all or a part of the level adjusting jig, and the through holes 29 at the tip of the screw 32 are rotated. And the projection length of the tip of the screw 33 from the screw hole 30 are adjusted to change the angle of the plate member 11 with respect to the support base 12.
(5) Again, the angle of the plate 11 with respect to the reference plane is measured.
(6) The above (4) and (5) are repeated to minimize the displacement of the uneven surface of the plate 11 with respect to the reference plane.

Then, after minimizing the displacement of the uneven surface of the plate 11 with respect to the reference plane, wire electric discharge machining is performed on the plate 11. When the processing of the plate material 11 is completed, the screws 37 of the level adjusting jigs 10 and 50 are loosened, the screws 24 and 25 are loosened, the presser plate 36 is moved backward, and the plate material 11 is removed from the plate material holding device 69. At this time, since the screws 24 and 25 and the presser plate 36 are attached to the plate material holder 23, the screws 24 and 25 and the presser plate are held before the new plate material is fixed to the support base 12. It is possible to avoid losing 36.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions and the like that do not depart from the gist are within the scope of the present invention.
For example, the plate material processing method is not limited to wire electric discharge machining, and may be milling or lathe machining.
Further, when the support base is not provided with a long plate and is composed of four pedestals, the same level adjustment jig can be used.

10: level adjusting jig, 11: plate material, 12: support base, 14: base member, 15: holding member, 16: screw hole, 17, 18: screw, 19, 20: through hole, 21, 22: screw, 23: Plate material holder, 24, 25: Screw, 26: Plate material holder, 27: Rectangular plate portion, 28: L-shaped portion, 29: Through hole, 30: Screw hole, 31: Washer, 32: Screw, 33: Screw, 34, 35: Guide hole, 36: Presser plate, 37: Screw, 38, 39: Tube material, 41: Screw hole, 42, 43: Notch, 50: Level adjustment jig, 51: Plate material holder, 52: L-shaped part, 53: Screw, 60, 61, 62: Base, 63: Long plate, 65, 66: Screw hole, 67: Straight part, 68: Through hole, 69: Plate material holding device

Claims (7)

A level adjusting jig used for fixing a plate material to a support base,
A screw hole A is formed, a base member fixed to the support base, a through hole and a screw hole B are formed, a holding member attached to the base member and sandwiching the plate material, and the through hole inserted. In this state, the tip is fitted into the screw hole A, the head is fitted into the screw hole B, and the head is brought into contact with the holding member, and the tip is brought into contact with the base member. And adjusting the projecting length of the tip end portion of the first screw from the through hole and the projecting length of the tip end portion of the second screw from the screw hole B, respectively. A level adjusting jig, characterized in that an angle of the plate material with respect to a table is changed. 2. The level adjusting jig according to claim 1, wherein the holding member includes a plate material receiving member attached to the base member, and a vertically long guide hole, and a third screw inserted through the guide hole. A plate retainer fixed to the retainer and capable of advancing and retreating along the guide hole by loosening the third screw, and the plate member is held by the plate retainer in the advanced position and the plate retainer. A level adjusting jig characterized in that the plate material is made removable by holding and retreating the plate material retainer. 3. The level adjusting jig according to claim 2, wherein the plate material presser includes a press plate in which the guide hole and the screw hole C are formed, and a first portion that is fitted into the screw hole C and a tip portion of which contacts the plate material. A level adjusting jig having four screws, wherein the first, second, and fourth screws are bolts that can be rotated by a common wrench. A plate material holding device having a support table and a level adjusting jig for fixing the plate material to the support table,
The level adjusting jig has a screw hole A formed therein, a base member fixed to the support base, a through hole and a screw hole B formed therein, and is attached to the base member to hold the plate member And the tip is fitted into the screw hole A with the through-hole inserted, the head is fitted into the screw hole B, and the tip is fitted into the screw hole B. A second screw abutting against the base member, and a projection length of the tip portion of the first screw from the through hole and a projection length of the tip portion of the second screw from the screw hole B, respectively. The plate material holding device, wherein the angle of the plate material with respect to the support base is changed by adjusting. 5. The plate material holding device according to claim 4, wherein the holding member is formed by a plate material receiving member attached to the base member and a third screw formed in a vertically long guide hole and inserted through the guide hole. A plate retainer fixed to the fixture and capable of moving forward and backward along the guide hole by loosening the third screw, and sandwiching the plate by the plate retainer in the advanced position and the plate retainer And the board | plate material holding | maintenance apparatus made into the state which can remove this board | plate material by retracting | retreating this board | plate material pressing tool. 6. The plate material holding device according to claim 4, wherein there are at least three level adjusting jigs, and at least one level adjusting jig is not collinear with other level adjusting jigs. Plate material holding device. A method for adjusting the arrangement of a plate material that adjusts the arrangement of the plate material with the uneven surface attached to the support base and reduces the displacement of the uneven surface of the plate material with respect to the reference plane,
1) a base member that is formed with a screw hole A and is fixed to the support; 2) a holding member that is formed with a through hole and a screw hole B and is attached to the base member and sandwiches the plate material; ) A tip end portion fitted into the screw hole A with the through-hole inserted, and a head portion fitted into the screw hole B, and a head portion fitted into the screw hole B. At least three level adjustment jigs having a second screw contacting the base member, wherein at least one of the level adjustment jigs is not collinear with other level adjustment jigs; Fixed to
Sandwiching the plate material by the holding members of the at least three level adjustment jigs, and attaching the plate material to the support base;
Measure the displacement of the uneven surface of the plate relative to the reference plane,
For all or a part of the at least three level adjusting jigs, the length of protrusion of the tip of the first screw from the through hole and the length of protrusion of the tip of the second screw from the screw hole B are set. A method for adjusting the arrangement of plate members, wherein the adjustment of each plate is performed to change the angle of the plate member with respect to the support base to minimize the displacement of the uneven surface of the plate member with respect to the reference plane.

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