JPH04348835A - Positioning clamp device for pallet - Google Patents

Abstract

PURPOSE:To perform positioning through absorption of errors in a vertical direction and a horizontal direction when a pallet is positioned for mounting. CONSTITUTION:When a pallet 32 is positioned to a base table 30 for mounting, a first positioning mechanism 36 slightly moves the one of a first engaging member 60 and a first engaging protrusion part 50 in an engaging direction by supporting the one thereof to a central part between two bending sheets 64 and 66. Further, a second positioning mechanism 38 slightly resiliently moves, in a manner described above, the one of a second engaging protrusion part 102 and a second engaging member 104 in an engaging direction and slightly resiliently moves the other along the direction of the first positioning mechanism 36. Further, an auxiliary stand 34 having a positioning abutment part function and a tension mechanism 72 to clamp the auxiliary stand are provided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet clamping device, and more particularly to a positioning clamping device capable of accurately positioning and fixing a pallet used in a machine tool or the like.

0002

[Prior Art] In electrical discharge machines, machine tools, etc., various types of machining are performed on workpieces on a relatively large-area pallet that is removably installed on a table on the side of the machine. The lever pallet is replaced. Furthermore, when replacing tools and the like using a pallet changer in an electrical discharge machine, it is necessary to replace the attached pallet. In this case, for example, when the processing accuracy is very high and precision in microns is required, each time the pallet is replaced, it is necessary to accurately position and fix it to the machine table. Here, a conventional pallet positioning and clamping device will be explained. 17 and 18 show a conventional positioning clamp device, in which fitting recesses 4 having a conical cross section are formed at the four corners of the lower surface of the pallet 2, and fitting recesses 4 having a conical cross section are formed at the four corners of the lower machine side table 6. A conical fitting protrusion 8 with a horizontally cut end that fits into the recess 4 is provided, and by bringing these convex parts close together and fitting at four places, the height and horizontal direction of the pallet 2 can be adjusted. It is designed to determine the position of the

Another conventional clamp device is shown in FIG.
As shown in FIG. 22, vertical positioning abutment portions 10 are provided protruding from the four corners of the upper surface of the machine side table 6, and the abutment portions 1 whose upper ends are provided on the lower surface of the pallet 2
2, positioning in the vertical direction is performed. As horizontal positioning members, a straight pin 12 and a diamond pin 14 are provided spaced apart along the diagonal direction of the machine side table 6. The straight pin 12 is formed into a substantially cylindrical shape, while the diamond pin 14 is formed into a columnar shape in which the surface facing the straight pin 12 and the surface opposite thereto are each shaved off into an arc shape. And both pins 12
, 14 on the underside of the pallet 2 for fitting and receiving the
As shown in FIG. 22, a hollow cylindrical straight pin recess 16 and a hollow cylindrical diamond pin recess 18 are provided. Since the contact area between the diamond pin 14 and the inner wall of the diamond pin recess 18 is reduced by scraping both sides of the diamond pin 14, when these pins and the recess are fitted, there is a distance between the two pins 12 and 14. When an error occurs, the error is absorbed by a slight play on the diamond pin 14 side.

Furthermore, other conventional clamp devices include:
As shown in FIGS. 23 and 24, the machine side table has two clamp mechanisms 20 and 22. One clamp mechanism 20 has four tapered protrusions 24 orthogonal to the X and Y axes, and a plate having four holes (not shown) opposite to the protrusions 24. It is designed to perform positioning. Also, the other clamp mechanism 2
2 has a slight play in the axial direction parallel to either one of the X and Y axes, and is positioned without any gap in the direction orthogonal to this axis.

[0005]

[Problem to be solved by the invention] However, FIG.
In the conventional device shown in FIG. 1, unless the mounting positions of the four fitting protrusions 8 and the corresponding four fitting recesses 4 are set accurately, the so-called sitting will be poor, resulting in high precision. I can't get it out. Further, it is also relatively difficult to manufacture the fitting convex portion 8 and the fitting recess 4 with such high precision that the seat does not become uncomfortable. In addition, in the conventional device shown in FIG. 19, since the error in the distance between the pins 12 and 14 is absorbed by the diamond pin 18 side, so-called sitting is improved, but a gap occurs at the fitting portion of the diamond pin 18. Therefore, it has been difficult to achieve an accuracy of, for example, 0.01 mm or less.

Furthermore, in the conventional device shown in FIG.
As shown in FIGS. 24(a) and 24(b), the mounting positions of the tapered protrusions on the parallel axes of the two clamp mechanisms 22 and 24 are the corresponding mounting positions of the holes on the other side, that is, on the plate side. If they are not placed on the same straight line, angular or positional errors may occur. Furthermore, since horizontal positioning is performed by fitting a tapered protrusion into a hole made in a single plate, the rigidity of a single plate is weak, and this can cause distortion and deformation, resulting in horizontal positioning. There is also a possibility that accurate positioning may not be possible. The present invention has focused on the above-mentioned problems and has been devised to effectively solve them. An object of the present invention is to provide a pallet positioning and clamping device that can accurately position and fix a pallet.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention aims to position and connect a plate-shaped pallet having a relatively large area, such as the one provided in a processing machine, to the base side. A pallet clamping device for the purpose of the present invention includes a first engaging protrusion provided on either one of the pallet or the base, and a first engaging member provided on the other to engage with the first engaging protrusion, a first positioning mechanism in which either the first engagement protrusion or the first engagement member is slightly elastically movable only in the fitting direction; and one of the pallet and the base; a second engaging convex portion provided on the second engaging member provided on the other side to fit with the second engaging convex portion;
Either one of the second engagement protrusion and the second engagement member is slightly elastically movable only in the fitting direction, and the other is made to be slightly elastically movable in the direction in which the first positioning mechanism is located. a second positioning mechanism that is slightly elastically movable; an auxiliary stand provided protruding from the pallet and the base so as to face each other and having at least a positioning abutment function; and the pallet and the base. The device includes a tension mechanism for clamping the base after the base is positioned.

[0008]

[Operation] Since the present invention is constructed as described above, the first positioning mechanism has a structure in which either the first engaging protrusion or the first engaging member is slightly elastic only in the fitting direction, that is, in the axial direction. Since it is movable in the horizontal direction and has high rigidity in the horizontal direction, it is possible to absorb errors in the axial direction and to accurately position the position in the horizontal direction without causing positional deviation. Also, a second positioning mechanism, e.g.
The engaging protrusion is slightly elastically movable in the direction in which the first positioning mechanism is positioned, and the second engaging member is slightly elastically movable only in the fitting direction, that is, the axial direction. Therefore, even if there is an error in the distance between the first positioning mechanism and the second positioning mechanism on the pallet side and the distance on the base side, the second engaging protrusion will move between the two By slightly moving on a straight line connecting the positioning mechanisms, fitting is achieved with the above-mentioned error absorbed. Then, by providing an auxiliary stand having at least a positioning butting function, the pallet is supported on the base at at least three points, and when the positioning is done accurately, a tension mechanism is activated to lift the pallet. Securely clamp and fix the base.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the pallet positioning and clamping device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a perspective view showing a pallet and a base on which a pallet positioning clamp device according to the present invention is attached, FIG. 2 is a front view showing the pallet and base of FIG. 4 is an exploded perspective view showing the first positioning mechanism shown in FIG. 3; FIG. 5 is a second engagement protrusion of the second positioning mechanism used in the positioning clamp device of the present invention. FIG. 6 is a plan view showing the second engaging protrusion shown in FIG.
It is a sectional view taken along the line I-VII. As shown, 30
is a base serving as, for example, a machine side table, and above this base 30 a relatively large-area plate-shaped pallet 32 is positioned with its four corners supported. Specifically, a positioning clamp device according to the present invention is interposed between the pallet 32 and the base 30 to perform positioning clamping. This positioning clamp device has two parts that support one corner of the pallet 32 and the base 30.
It is mainly composed of two auxiliary stands 34, 34, one first positioning mechanism 36 and one second positioning mechanism 38 that support the corner on the other side.

The auxiliary stands 34, 34 each have only a positioning function in the vertical direction, and a cylindrical pallet side protrusion 34a that protrudes downward is provided on the lower surface of the pallet 32. A cylindrical base-side protrusion 34b that protrudes upward is provided on the upper surface of the base 30, facing the pallet-side protrusion 34a. The diameter of the base side protrusion 34b is set to be slightly larger than the diameter of the pallet side protrusion 34a, and the upper and lower end surfaces of each are made into a planar shape with high precision. At the time of abutting, the above-mentioned vertical positioning and abutting function can be performed. The surface where the lower end surface of the pallet side protrusion 34a and the upper end surface of the base side protrusion 34b contact is configured as an overall positioning abutment surface 40, and the first and second positioning mechanisms 36 and 38 are also At this abutment surface 40, it will be divided into upper and lower parts as will be described later. The first positioning mechanism 36 is configured as shown in FIGS. 3 and 4. Specifically, this first positioning mechanism 36 connects a first coupling member 42 located on the lower side and a second coupling member 4 located on the upper side.
4, the first coupling member 42 is connected to the base 30 side, and the second coupling member 44 is connected to the pallet 32 side. The upper second coupling member 44 is formed into a cylinder or cylinder with a circular cross section,
A protruding annular abutting portion 46 having a trapezoidal cross section is formed at the peripheral edge of the lower end, and the lower end surface is configured as a positioning surface 48 processed to have highly accurate flatness. This abutting portion 46 is formed concentrically with the axis A of the clamp.

[0011] A first engagement protrusion 50 having a substantially conical outer surface 50a is provided at the center of the second coupling member 44 so as to protrude downward. This first engagement convex portion 50 is also formed concentrically with the axis A of the clamp. From the tip of this first engagement convex portion 50,
A pull stud 52 is provided extending downward, and a locking portion 54 enlarged in the radial direction is provided at the tip end of the pull stud 52.
is formed, which is then clamped by a tensioning mechanism as described below. On the other hand, the first connecting member 42 located below is formed into a cylindrical shape with a circular cross section, and the upper peripheral edge of the first connecting member 42 corresponds to the abutment part 46 of the second connecting member 44. An annular abutting portion 56 having a rectangular cross section and projecting upward is formed, and its upper end surface is configured as a positioning surface 58 processed to have highly accurate flatness. This positioning surface 58 is formed concentrically with the axis B of the clamp, and is formed concentrically with the axis B of the clamp.
It comes into precise contact with the positioning surface 48 on the 4th side. These positioning surfaces 48 and 58 are set on the same plane as the positioning abutment surface 40.

[0012] At the center of the first coupling member 42 is a first engagement member 60 disposed concentrically with the axis B.
is provided. Specifically, this first engagement member 60
is formed like a truncated cone with a reduced diameter at the bottom, and has an insertion hole 62 formed in its center for inserting the first engagement protrusion 50 of the second coupling member 44, This inner surface 60a is formed into a substantially conical shape, and the inner surface 60a is substantially conical.
It is configured to make precise contact with the outer surface 50a of the engagement protrusion 50. The first engaging member 60 has its upper and lower ends at the center of two disc-shaped flexible plates 64 and 66 made of steel plates, for example, which are arranged in parallel in a direction perpendicular to the axis A. The flexible plates 64 and 66 have a large number of bolt holes 64a and 64 at their peripheral edges.
4b is formed, and a bolt 6 is inserted through the bolt holes 64a and 64b into the stepped portion formed inside the first coupling member 42.
It is tightened and fixed with 8. These flexible plates 6
4 and 66 have a predetermined elastic force, and are designed to be slightly elastically deformable in the axial direction, and have strong rigidity against deformation in the direction perpendicular to the axis, that is, in the lateral direction. It is structured so that it can perform.

The flexible plate 66 is also formed with a plurality of holes 70 into which a wrench or the like is inserted when tightening the bolts that fix the flexible plate 64 to the first coupling member 42. A tension mechanism 72 for clamping the second coupling member 44 is provided at the lower part of the first coupling member 42 . This tension mechanism 72 has a piston 74 operated by air in the center, and this piston 74 has a hollow cylindrical body extending upwardly along the axis B via a seal member 76. A connecting member 78 is provided. A plurality of clamp balls 80 are loosely fitted into the lower part of the hollow connecting member 78 along its circumferential direction, and
Inside this connecting member 78, this clamp ball 80
In order to prevent the ball from falling off, a plunger 84 is provided which is biased toward the distal end by a spring 82 to prevent the ball from falling off. Then, the second connecting member 44 is inserted into the connecting member 78.
By moving the piston 74 downward while inserting the locking portion 54 provided at the tip of the first engaging convex portion 50, the locking portion 54 can be clamped by the clamp ball 80. It is configured.

A guide ring 86 is formed on the outer periphery of the clamp ball 80. The guide ring 86 has an enlarged diameter at the tip to allow the ball 80 to escape outward during unclamping. A strong resilient member, such as a clamp spring 88, is provided within the cylinder to constantly bias the piston 74 in the clamping direction. Furthermore, the housing 90 of the tension mechanism 72 has a clamp air supply port 92 that supplies air for driving the piston 74.
and an unclamping air supply port 94. In this way, the first positioning mechanism 36 is provided with a combination of the functions of an auxiliary stand having a butt function for positioning in the vertical direction and a function of a tension mechanism. On the other hand, the second positioning mechanism 38 is configured as shown in FIGS. 5 to 7. That is, the part of this second positioning mechanism 38 that is attached to the base 30 side is the same as that shown in FIG.
It is constructed in exactly the same manner as the first positioning mechanism 36 shown in FIG. The third coupling member 100 includes a second engagement member 104 having a conical inner surface formed in the same shape as the first engagement member 60, and a second engagement member 104 with the second engagement member 104 in the center. It has two disk-shaped flexible plates 107 and 109 having the same shape as the flexible plates 64 and 66, which are supported together.

The second engagement protrusion 102 that fits into the second engagement member 104 is formed into a conical shape like the first engagement protrusion 50, and is attached to the pallet 32 side. . The attachment portion of the second engagement protrusion 102 to the pallet 32 side has a slightly different configuration from that of the first engagement protrusion 50. That is, the ring-shaped outer frame 110
A ring-shaped abutment part 112 is formed on the peripheral edge of the lower end of the , which is the same as in the case of the first engaging convex part 50, but the base of the second engaging convex part 102 is The end portions include a plurality of (four or more) flexible plates 105a, 105b, 106a, 106 arranged perpendicularly to the direction in which the first positioning mechanism 36 is located and parallel to each other.
b, 108a, and 108b, the ring-shaped outer frame 11
0 and is supported. And each flexible plate 1
05, 106, and 108 are arranged so that their respective length directions are along a horizontal direction perpendicular to the direction in which the first positioning mechanism 36 is located, and these flexible plates 105, 106, and 108 are bent. By doing so, the second
The engaging protrusion 102 is configured to be elastically movable by a small amount along the direction in which the first positioning mechanism 36 is located. In addition, since each of the flexible plates 105, 106, and 108 has high rigidity in the longitudinal direction, the second
The engagement convex portion 102 is configured so as not to move in the length direction of the flexible plate.

Next, the operation of this embodiment configured as above will be explained. First, with each corner of the pallet 32 corresponding to each corner of the base 30, the pallet 3
2 gradually approach the base 30, and each auxiliary stand 3
4, 34 pallet side protrusion 34a and base side protrusion 34b
At the same time, the outer surface 50a of the first engagement protrusion 50 of the first positioning mechanism 36, the inner surface 60a of the first engagement member 60, and the second engagement protrusion of the second positioning mechanism 38 are brought into substantially contact with each other. The outer surface 102a of the second engaging member 102 and the inner surface 104a of the second engaging member 104 are brought into contact with each other. In this state, each of the first and second engagement protrusions 50, 102, the first and second engagement members 60,
104 is the state before joining, and all the flexible plates are not deformed at all. Then, when the pallet 32 is further brought closer to the base 30, the first engaging convex portion 50 and the first engaging member 60 of the first positioning mechanism 36 are fitted into each other, and the second positioning mechanism 38 is also brought closer to the base 30. The second engaging convex portion 102 and the second engaging member 104 also fit into each other.

At this time, in the first positioning mechanism 36,
The axis A of the first engagement convex portion 50 and the axis B of the first engagement member 60
If there is a slight deviation between the
Although the outer surface 50a of the engagement protrusion 50 and the inner surface 60a of the first engagement member 60 contact unevenly only on one side, the two flexible plates supporting the first engagement member 60 64, 6
6 is axially downward because of its high rigidity in the lateral direction;
That is, it deforms or bends only in the fitting direction, and does not deform in the lateral direction. Therefore, as the first engaging convex portion 50 and the first engaging member 60 come closer together, the misalignment between the axes A and B is corrected and the axes are finally aligned. Then, both positioning surfaces 48 and 58 come into contact. and,
Since the outer surface 50a of the first engagement convex portion 50 and the inner surface 60a of the first engagement member 60 are formed as conical surfaces, the two axes may be deviated in any direction perpendicular to the axes. However, it is possible to reliably align both axes.

Furthermore, as mentioned above, the first engaging member 60 is
Due to the action of the two disc-shaped flexible plates 64 and 66, it is configured to be slightly elastic in the axial direction, so that the positioning surfaces 48 and 58 and the first engagement protrusion 50 and the first engagement Even if a positioning error occurs between the first engaging convex portion 50 and the first engaging member 44, the positioning error is absorbed by the action of the flexible plates 64 and 66, and the first engaging convex portion 50 and the first engaging member 44 are aligned in the axial direction. It becomes possible to determine the position with high accuracy. Therefore, the location where this first positioning mechanism 36 is provided functions as a reference point. On the other hand, at the same time,
Also in the second positioning mechanism 38, the second engagement protrusion 102
and the second engaging member 104 will gradually fit into each other. At this time, as shown in FIGS. 9 and 10, the distance L1 between the first and second positioning mechanisms 36 and 38 on the base 30 side, and the first engagement protrusion 50 and the second engagement protrusion on the pallet 32 side. Part 102
If there is a slight difference, that is, a slight deviation between the distance L2 between the
The deviation is absorbed. That is, as shown in FIG. 11(a), the first engaging member 60 and the second engaging member 104 of the base 30
When there is a deviation L3 between the distance L1 between the two and the distance L2 between the first engagement protrusion 50 and the second engagement protrusion 102 on the pallet 32 side as shown in FIG. 11(b). The above second
As the engagement protrusion 102 and the second engagement member 104 are fitted together, six flexible plates 105a, 105b, 106a, which support the second engagement protrusion 102, as shown in FIG. 11(c),
106b, 108a, 108b are the first positioning mechanism 3
6 is slightly deformed along the direction in which the second engaging convex portion 102 is slightly elastically moved. Therefore, the second engaging convex portion 102 and the second engaging member 104 fit together while the error L3 is absorbed.

Further, the second engaging member 104 is supported by two flexible plates similarly to the first engaging member 60, and therefore, like the first engaging member 60 described above, the second engaging member 104 is rotated in the axial direction. That is, it goes without saying that errors in the fitting direction can be absorbed. In this way, the first positioning mechanism 36 and the second positioning mechanism 3
8, the first and second positioning mechanisms 36 and 38 are connected, respectively.
Air supply port 92 for the clamp of the tension mechanism 72, 72
Air is supplied from the piston 74 to lower the piston 74, and the clamp ball 80 causes the first and second engagement protrusions 50, 10 to move downward.
Pull down the locking part 54 at the tip of 2 to join and clamp. In addition, when unclamping the first and second engaging protrusions and the first and second engaging members, the piston 74 is pushed upward by supplying air from the unclamping air supply port 94. clamp ball 80
Loosely fit and release the connection.

[0020] The conical first and second parts in the above embodiment
The opening angle of the conical surface of the engaging convex portions 50 and 102 is desirably set in a range of 5° to 60°. Also, the first and second
Although the outer surface of the engaging convex portion and the inner surfaces of the first and second engaging members are configured to be in contact with each other over the entire circumference, the present invention is not limited thereto. For example, three locations arranged at 120° intervals may be in contact with each other. Further, the outer surfaces of the first and second engaging convex portions may be formed into a spherical shape. According to this, the contact area is reduced, and it is possible to reduce the adverse effects of adhesion of dust, etc. upon joining. becomes. In this way, according to this embodiment,
The first positioning mechanism 36 is provided with a first engaging protrusion 50 that can be slightly elastically moved only in the fitting direction, that is, in the axial direction,
The second positioning mechanism 38 includes a second engagement convex portion 102 that is slightly elastically movable in the fitting direction, and a second engagement convex portion 102 that is slightly elastically movable in the direction in which the first positioning mechanism 38 is positioned. Since the fitting member 104 is provided, it becomes possible to accurately position and clamp the pallet 32 while absorbing errors in the fitting direction and horizontal direction.

[0021] In the above embodiment, the first and second
Although both the positioning mechanisms 36 and 38 are constructed by combining the vertical abutment function, the positioning function, and the tension mechanism, the present invention is not limited thereto, and may be constructed as shown in FIGS. 12 to 14. That is, auxiliary stands 34 for positioning in the vertical direction as shown in FIG. 1 are provided at the four corners of the facing surfaces of the base 30 and the pallet 32, and a piston 74 as shown in FIG. A pull stud 52 having a locking portion 54 is formed on the pallet 32 side opposite to this. Further, on one side of the tensioning mechanism 72, a first positioning mechanism 36a is provided, which is configured by removing the tensioning mechanism 72 from the first positioning mechanism 36 as shown in FIG. 3, and on the other side,
A second positioning mechanism 38a is provided, which is constructed by removing the tension mechanism from the second positioning mechanism 38 as shown in FIGS. , the tensioning mechanisms may be located at different locations.

Furthermore, as shown in FIG.
Positioning abutment tension mechanism 1 which integrally forms the vertical positioning abutment function and tension mechanism of 4.
20 may be provided at the four corners of the pallet 32 and the base 30, and a first positioning mechanism 36a and a second positioning mechanism 38a without the tension mechanism may be provided on both sides as shown in FIG. Furthermore, as shown in FIG. 16, the first and second engaging protrusions 50 and 102 and the first and second engaging members
, 104 are installed upside down, and the first
The second engaging protrusions 60, 104 may be attached to two parallel flexible plates 122, 124 so as to be slightly elastically movable in the vertical direction.

[0023]

[Effects of the Invention] As explained above, according to the present invention,
It can exhibit the following excellent effects. Since we have provided a positioning mechanism that can move slightly elastically only in the mating direction, and a positioning mechanism that can slightly elastically move in the mating direction and the direction toward the positioning mechanism, errors in the mating direction and horizontal It becomes possible to accurately position the pallet while absorbing directional errors. Therefore, there is no need for particularly high precision manufacturing, and high reproducibility can be maintained even after repeated attachment and detachment.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a pallet and a base to which a pallet positioning and clamping device according to the present invention is attached.

FIG. 2 is a front view showing the pallet and base of FIG. 1;

FIG. 3 is a sectional view showing a coupled state of the first positioning mechanism used in the positioning clamp device of the present invention.

FIG. 4 is a partial perspective view showing the first positioning mechanism shown in FIG. 3;

FIG. 5 is a perspective view showing a second engaging convex portion of the second positioning mechanism used in the positioning clamp device of the present invention.

FIG. 6 is a plan view showing the second engaging protrusion shown in FIG. 5;

7 is a sectional view taken along the line VII-VII in FIG. 6; FIG.

FIG. 8 is a sectional view showing just before the first and second positioning mechanisms are combined.

FIG. 9 is a plan view showing the mounting state on the base side.

FIG. 10 is a plan view showing the mounting state on the pallet side.

FIG. 11 is an explanatory diagram for explaining the operation of the second positioning mechanism.

FIG. 12 is a plan view showing another embodiment of the present invention.

FIG. 13 is a diagram for explaining the operation of another embodiment of the present invention.

FIG. 14 is a sectional view showing another embodiment of the present invention.

FIG. 15 is a plan view showing still another embodiment of the present invention.

FIG. 16 is a sectional view showing still another embodiment of the present invention.

FIG. 17 is a perspective view showing a conventional positioning clamp device.

FIG. 18 is a cross-sectional view of the device shown in FIG. 17;

FIG. 19 is a perspective view showing another conventional positioning clamp device.

FIG. 20 is a sectional view showing a positioning abutment part of the device shown in FIG. 19;

FIG. 21 is a plan view showing the base side of the device shown in FIG. 19;

FIG. 22 is a sectional view showing the pallet side of the apparatus shown in FIG. 19;

FIG. 23 is a perspective view showing still another conventional positioning clamp device.

FIG. 24 is an explanatory diagram for explaining errors caused by the apparatus shown in FIG. 23;

[Explanation of symbols]

30...base 32...Palette 34...Auxiliary stand 36...First positioning mechanism 38...Second positioning mechanism 42...First coupling member 44...Second coupling member 46...Abutment part 50...First engagement convex portion 58...Abutment part 60...first engagement member 64, 66...Flexible plate 72...Tension mechanism 80...Clamp ball 88...Clamp spring 102...Second engagement convex portion 104...Second engagement member 105, 106, 108...Flexible plate 107, 109...Flexible plate

Claims (3)

[Claims] 1. A pallet clamping device for positioning and connecting a plate-shaped pallet having a relatively large area such as a processing machine, etc. to a base side, in which either of the pallet and the base is connected. a first engaging convex portion provided on one side and a first engaging member provided on the other side to fit therewith; either the first engaging convex portion or the first engaging member; A first positioning mechanism, one of which is slightly elastically movable only in the fitting direction, and a second engaging protrusion provided on either one of the pallet and the base, and a second engaging protrusion for fitting thereto. a second engaging member provided on the other side;
Either one of the second engagement protrusion and the second engagement member is slightly elastically movable only in the fitting direction, and the other is made to be slightly elastically movable in the direction in which the first positioning mechanism is located. a second positioning mechanism that is slightly elastically movable; an auxiliary stand provided protruding from the pallet and the base so as to face each other and having at least a positioning abutment function; and the pallet and the base. A pallet positioning and clamping device comprising: a base; and a tension mechanism for clamping the base after they are positioned. 2. Any one of the first engagement protrusion, the first engagement member, the second engagement protrusion, and the second engagement member is arranged in a direction perpendicular to the fitting direction. 2. The positioning clamp device according to claim 1, further comprising a plurality of flexible plates arranged in parallel and elastically varying only in the axial direction. 3. The positioning clamp device according to claim 1, wherein the first positioning mechanism and the second positioning mechanism include the tension mechanism.