WO2008023429A1

WO2008023429A1 - Positioning/fixing device for work pallet

Info

Publication number: WO2008023429A1
Application number: PCT/JP2006/316692
Authority: WO
Inventors: Ichiro Kitaura
Original assignee: Pascal Engineering Corporation
Priority date: 2006-08-25
Filing date: 2006-08-25
Publication date: 2008-02-28
Also published as: JPWO2008023429A1; TW200815146A

Abstract

A positioning/fixing device for a work pallet in which positioning precision with which a work pallet is positioned on a base member can be enhanced by a positioning mechanism, and the positioning mechanism can be simplified. The X, Y axes positioning mechanisms (4, 5) comprises X, Y axes engaging male members (20, 30) which include X, Y axes tapered engaging portions (20a, 30a) having X, Y direction width decreasing upward and elastically-deformable X, Y axes resilient plate portions (20b, 30b) extending to the opposite sides in X direction and Y direction from the lower ends of the X, Y axes engaging portions (20a, 30a), and are fixed to a base member (2), clearance grooves (29, 39) made in a portion of the upper surface side portion of the base member (2) opposing the X, Y axes resilient plate portions (20b, 30b) and allowing micro downward elastic deformation of the X, Y axes resilient plate portions (20b, 30b), and X, Y axes engaging female members (25, 35) which have X, Y axes tapered engaging recesses (25a, 30a) with which the X, Y axes tapered engaging portions (20a, 30a) engage tightly, and are fixed to the work pallet (2).

Description

Specification

Positioning and fixing device for work pallets

Technical field

[0001] The present invention relates to a work pallet positioning fixing device for positioning and fixing a work pallet to a base member.

Background art

[0002] Generally, a positioning and fixing device for a work pallet includes a base member, a clamp mechanism that pulls and fixes the work nort downward on the base member, and the work pallet on a horizontal plane when the work pallet is fixed to the base member by the clamp mechanism. Are equipped with an X-axis positioning mechanism, a Y-axis positioning mechanism, and a Z-axis positioning mechanism for positioning in the X and Y directions orthogonal to each other and the lead Z direction (see, for example, Patent Documents 1 to 3).

[0003] In the apparatus described in Patent Document 1, the X-axis positioning mechanism is fixed to the base member and fixed to the work pallet, an engagement male member having a pair of taper engagement portions whose width in the X direction decreases toward the top. And a pair of taper engagement portions each having an engagement female member having a pair of taper engagement recesses that can be engaged in close contact with each other, and the Y-axis positioning mechanism is fixed to the base member in the Y direction. An engagement male member having a pair of taper engagement portions whose width decreases toward the top, and a pair of taper engagement recesses that are fixed to the work pallet and can be engaged in close contact with each other. With an engaging female member!

[0004] Each engaging female member of the X and Y axis positioning mechanism is disposed on a flat portion on the lower surface of the work pallet, both end portions in the width direction are formed thick and fixed to the lower surface of the work pallet with bolts, The portion having the other taper engaging recess is formed thin and in a cross-sectional hat shape so as to form a gap with the lower surface of the work pallet so as to be elastically deformable upward. The clamp mechanism has four sets of clamp bodies provided on the base member so as to protrude upward, and the Z-axis positioning mechanism has a truncated cone-shaped member of the four sets of clamp bodies that catches the lower surface of the work pallet. Thus, the work pallet is positioned on the base member in the Z direction.

[0005] In the apparatus described in Patent Document 2, as in Patent Document 1, the X and Y axis positioning mechanisms 2 A pair of engaging male members are provided on the base member, and two pairs of engaging female members are provided on the work pallet. The male member is integrally formed with the step portion of the base member, and a slit is formed in the lower portion of the engagement male member of the step portion of the base member so that the engaging male member can be elastically deformed downward.

[0006] In the apparatus described in Patent Document 3, two pairs of engaging female members of the X and Y axis positioning mechanisms are provided on the base member, and two pairs of engaging male members are provided on the work pallet. A downward convex step is formed in the vicinity of the peripheral edge of the pallet, and each engaging male member is integrally formed with the step portion of the work pallet, and this engaging male member can be elastically deformed upward. A slit or a large recess is formed in the upper part of the engaging male member.

[0007] Patent Document 1: Japanese Patent Laid-Open No. 7-132429

Patent Document 2: US Patent No. 6152436

Patent Document 3: US Pat. No. 5,634,757

Disclosure of the invention

Problems to be solved by the invention

[0008] In the work pallet positioning and fixing device, when the work pallet is attracted and fixed to the base member by the clamp mechanism, the X and Y axis positioning mechanisms are used to simply connect the taper engaging portion of the engaging male member with the taper engaging portion. By positioning the work pallet in the X and Y directions by engaging the taper engaging recess of the engaging female member, manufacturing errors of various members of this positioning and fixing device, At least one of the X, Y, and Z-axis positioning mechanisms will not function effectively due to errors in assembly of the male member, engaging female member to the base member, work pallet, etc. There is a possibility that positioning cannot be performed reliably in all directions

[0009] Therefore, when the work pallet is attracted and fixed to the base member by the clamp mechanism, the taper engaging portion of the engaging male member and the taper engaging recess of the engaging female member are engaged. In Patent Document 1, the engaging female member provided on the work pallet is elastically deformed upward. In Patent Document 2, the engaging male member provided on the base member is elastically deformed downward. By elastically deforming the engaging male member provided on the work pallet upward, the work pallet can be reliably positioned in all directions of X, Y, and Z on the base member. [0010] However, in the apparatus described in Patent Document 1, in order to provide the engaging female member on the work pallet so as to be elastically deformable upward, both end portions in the width direction of the engaging female member are formed thick, Since the portion having the taper engagement concave portion is formed thin and has a cross-sectional hat shape, the shape of the engagement female member becomes complicated, and therefore, the engagement female member becomes large and disadvantageous in production cost. Since the engaging female member is provided on the work pallet, a large number of engaging female members corresponding to a large number of work pallets to be used are required, and the maintenance cost increases.

[0011] In the apparatus described in Patent Document 2, since the engaging male member is provided on the base member so as to be elastically deformable downward, the configuration of the work pallet having the engaging female member can be simplified. However, a step portion is formed in the vicinity of the peripheral edge of the base member, and an engaging male member is integrally formed on the step portion, and the engaging male member is elastically deformed downward. Since the slit is formed in the lower portion of the engaging male member, the engaging male member and the base member having the slit are complicated, and the manufacturing load increases, which is disadvantageous in manufacturing cost.

[0012] In the apparatus described in Patent Document 3, a step portion is formed near the periphery of the work pallet, an engaging male member is integrally formed on the step portion, and the engaging male member is elastically deformed upward. For this reason, a slit or a large recess is formed in the upper part of the engaging male member in the step portion of the work pallet. Therefore, the manufacturing load of the work pallet having the engaging male member and the slit or the recess increases. As the manufacturing cost becomes disadvantageous and the work pallet becomes complicated, the maintenance cost becomes high as in Patent Document 1.

In the devices described in Patent Documents 2 and 3, the engaging male member and the engaging female member are integrally formed on the work pallet and the base member, so that the X and Y axis positioning mechanisms can function reliably. There are also problems such as that it is difficult to make fine adjustments, and that when the engaging male member and the engaging female member are worn, it is necessary to replace the entire base member and work pallet.

[0014] In particular, the object of the present invention is to simplify the structure of the X, Y axis positioning mechanism, and to place the work pallet on the base member by the X, Y, Z axis positioning mechanism. The object is to provide a work pallet positioning and fixing device capable of reliably positioning in a direction.

Means for solving the problem [0015] The invention of claim 1 includes a base member, a Z-axis positioning mechanism, an X-axis positioning mechanism, and a workpiece pallet positioned in the base member in the X and Y directions perpendicular to the vertical Z direction and the horizontal plane, respectively. In the work pallet positioning and fixing device having a Y-axis positioning mechanism and a clamp mechanism for attracting and fixing the work pallet downward to the base member, the Z-axis positioning mechanism is at least 3 spaced apart from each other on the upper surface of the base member. At least three Z-axis reference members that are installed at locations to receive the lower surface of the work pallet are provided. The X-axis positioning mechanism has an X-axis taper engagement portion whose X-direction width decreases toward the top, and this X-axis taper engagement X-axis engaging male having an elastically deformable X-axis elastic plate portion extending from the lower end portion of the joint portion to both sides in the X direction and fixed to the upper surface of the base member or a portion near the upper surface with a bolt A member, a relief groove that is recessed in a portion of the upper surface side portion of the base member that faces the X-axis elastic plate portion and allows microelastic deformation downward of the X-axis elastic plate portion, and the X-axis The X-axis taper engagement portion of the engagement male member is closely engaged, and has an X-axis taper engagement recess, and is fixed to the lower surface of the work pallet with a bolt. The shaft positioning mechanism has a Y-axis taper engaging portion whose Y-direction width decreases toward the upper side, and a Y-axis elastic plate portion that can be elastically deformed and extends from the lower end portion of this Y-axis taper engaging portion to both sides in the Y direction. And a Y-axis engaging male member fixed by bolts on the upper surface of the base member or in the vicinity of the upper surface, and a front portion of the upper surface side portion of the base member that is recessed in a portion facing the Y-axis elastic plate portion. Relief groove that allows minute elastic deformation of the Y-axis elastic plate part and Y-axis taper engagement of the Y-axis engagement male member And a Y-axis engaging female member fixed to the lower surface of the work pallet with a bolt.

In this work pallet positioning and fixing device, the workpiece pallet is fixed to the base member by the X, Y, Z axis positioning mechanism at the time when the workpiece pallet is attracted and fixed to the base member by the clamp mechanism. Positioned in the X, Y, and Z directions, respectively. At this time, in the X-axis positioning mechanism, the X-axis taper engagement force of the X-axis engagement male member fixed to the base member closely contacts the X-axis teno engagement recess of the X-axis engagement female member fixed to the work pallet. In the Y-axis positioning mechanism, the Y-axis taper engagement force of the Y-axis engagement male member fixed to the base member is fixed to the work pallet. The work pallet is in close contact with the Y-axis taper engagement recess of the Y-axis engagement female member. Positioned in the direction.

[0017] In the Z-axis positioning mechanism, at least three Z-axis reference members provided on the base member receive the lower surface of the work pallet, and before the work pallet is positioned in the Z direction, the X and Y axes The taper engagement part is configured to be closely engaged with the X and Y axis taper engagement recesses.

That is, when the work pallet is attracted downward to the base member by the clamp mechanism, the X and Y axis taper engagement portions are brought into close contact with the X and Y axis taper engagement recesses by the clamp force. Maintaining the state, the X-axis elastic plate part of the X-axis engaging male member is slightly elastically deformed downward, and the Y-axis elastic plate part of the Y-axis engaging male member is slightly elastically deformed downward, so that the Z-axis reference The lower surface of the work pallet is received by the member, and the work pallet is positioned and fixed in all directions of X, Y, and Z.

[0019] The invention of claim 2 is the invention of claim 1, wherein an attachment recess having a shape substantially the same as that of the X-axis engaging male member is formed on the upper surface side portion of the base member. The X-axis elastic plate part of the engaging male member is fitted and both ends in the X direction are fixed with bolts, and a relief groove allowing the elastic deformation of the X-axis elastic plate part is recessed from the bottom of this mounting recess, A mounting recess having substantially the same shape as that of the Y-axis engaging male member is formed on the upper surface side portion of the base member, and the Y-axis elastic plate portion of the Y-axis engaging male member is fitted into the mounting recess. Both ends in the Y direction are fixed with bolts, and a relief groove that allows elastic deformation of the Y-axis elastic plate is provided in the bottom of the mounting recess.

[0020] The invention of claim 3 is the invention of claim 2, wherein the fixing bolt of the X-axis engaging male member is inserted into the base member by a lower surface side force, and the upper end of the bolt is X-axis elastic. A bolt for fixing the Y-axis engaging male member is passed through the base member from the lower surface side force, and the upper end of the bolt is screwed into the Y-axis elastic plate. It is characterized by.

[0021] A fourth aspect of the invention is characterized in that, in any one of the first to third aspects of the invention, a compression-deformable and shape-recoverable sealing member accommodated in the escape groove is provided.

The invention's effect

[0022] According to the invention of claim 1, the engaging male member is fixed to the base member with the bolt while the X and Y axis positioning mechanisms are provided, and the engaging female member is fixed to the work pallet with the bolt. Set up An elastic plate is provided in the male member, and a relief groove that allows minute elastic deformation of the elastic plate downward is provided in the base member, so the work pallet is attracted and fixed to the base member by the clamp mechanism. At this time, the taper engaging portion of the engaging male member is kept in close contact with the taper engaging recess of the engaging female member, and the elastic plate portion is slightly elastically deformed downward. As a result, all the X, Y, and Z axis positioning mechanisms function effectively, and the workpiece pallet can be reliably positioned in the X, Y, and Z directions on the base member. Then, by providing the relief groove in the base member, the engaging male member can be formed in a simple shape, and the elastic plate portion can be elastically deformed downward downward, and also escaped to the base member. Since the groove can be easily formed with a simple shape, the structure of the X and Y axis positioning mechanism can be simplified, and the base member with the engaging male member and the relief groove can be easily manufactured, which is advantageous in terms of manufacturing cost. Therefore, the structure of the work pallet can be further simplified, and the work cost can be reduced because it is the same for many work pallets to be used. Since the engaging male member is fixed to the base member with bolts, and the engaging female member is fixed to the work pallet with bolts, and the engaging male member and the engaging female member are provided, X, Y Make fine adjustments to ensure that the shaft positioning mechanism functions properly, and even if the engaging male member and engaging female member wear, replace only the engaging male member and engaging female member to achieve the positioning function. Can be maintained.

[0023] According to the invention of claim 2, since the mounting recess is formed in the base member and the inertia plate portion of the engaging male member is fitted into the mounting recess, the engaging male member is securely attached to the base member. It can be positioned and assembled, and the elastic plate part can be provided without protruding the base member force greatly upward. Both ends of this elastic plate part are fixed to the mounting recess with bolts, and the relief groove is formed at the bottom of the mounting recess. Therefore, the elastic plate portion can be reliably elastically deformed downward.

[0024] According to the invention of claim 3, the bolt for fixing the engaging male member is passed through the base member from the lower surface side, and the upper end portion of the bolt is screwed into the elastic plate portion. The both ends of the elastic plate portion can be securely fixed to the mounting recess without exposing the upper surface of the base member.

[0025] According to the invention of claim 4, since the compression deformable and shape returnable sealing member housed in the escape groove is provided, the elastic deformation of the engaging male member in the downward direction of the elastic plate portion is inhibited. It is possible to reliably prevent dust and dirt from cutting parts from entering the escape groove. it can.

Brief Description of Drawings

FIG. 1 is a perspective view from above of a work pallet positioning and fixing device according to an embodiment.

FIG. 2 is a perspective view of the lower force of the work pallet positioning and fixing device.

FIG. 3 is a plan view of a base member.

FIG. 4 is a side view of the base member.

FIG. 5 is a longitudinal sectional view of a work pallet positioning and fixing device.

FIG. 6 is a longitudinal sectional view of a work pallet positioning and fixing device.

Explanation of symbols

[0027] 1 Work pallet positioning and fixing device

2 Base material

2c Mounting recess

3 Clamp mechanism

4 X-axis positioning mechanism

5 Y-axis positioning mechanism

6 Z-axis positioning mechanism

9 Work Noret

20 X-axis engaging male member

20a X-axis taper engagement part

20b X-axis elastic plate

21 Bonoreto

25 X-axis engaging female member

25a X-axis taper engagement recess

29 Recess Groove

30 Y-axis engaging male member

30a Y-axis taper engagement part

30b Y-axis elastic plate

35 Y-axis engaging female member 35a Y-axis taper engagement recess

39 Recess Groove

40 Z-axis reference member

BEST MODE FOR CARRYING OUT THE INVENTION

[0028] The work pallet positioning and fixing device of the present invention fixes the work pallet to the base member by pulling it downward, and at that time, the work pallet is perpendicular to the X and Y directions perpendicular to the horizontal plane on the base member. Each is positioned in the direction.

Example

As shown in FIGS. 1 to 6, the work pallet positioning and fixing device 1 includes a base member 2, a clamp mechanism 3 that pulls and fixes the work pallet 9 downward to the base member 2, and a base member 2. The X-axis positioning mechanism 4, the Y-axis positioning mechanism 5, and the Z-axis positioning mechanism 6 position the work pallet 9 in the X and Y directions perpendicular to the horizontal plane and the vertical Z direction, respectively.

[0030] The base member 2 is formed in a rectangular block shape having a size corresponding to the work pallet 9 fixed to the base member 2, and the clamp body 10 of the clamp mechanism 3, X is formed on the base member 2. A pair of X-axis engaging male members 20 of the axis positioning mechanism 4, a pair of Y-axis engaging male members 30 of the Y-axis positioning mechanism 5, and four Z-axis reference members 40 of the Z-axis positioning mechanism 6 are provided.ヽ.

[0031] The clamp body 10 is disposed in the center portion of the base member 2, and the pair of X-axis engaging male members 20 are disposed symmetrically in the Y direction with the clamp body 10 sandwiched in the center portion of the base member 2 in the X direction. The pair of Y-axis engaging male members 30 are symmetrically arranged in the X direction with the clamp body 10 sandwiched between the Y direction center portion of the base member 2. These four engaging male members 20, 30 are arranged around the axis of the clamp body 10 at intervals of 90 degrees, and the four Z-axis reference members 40 are arranged around the axis of the clamp body 10 at intervals of 90 degrees. The four engaging male members 20, 30 are arranged at positions shifted by 45 degrees.

[0032] The work pallet 9 is formed in a rectangular shape in plan view. The work pallet 9 includes a clamp engaging member 15 of the clamp mechanism 3, a pair of X-axis engaging female members 25 of the X-axis positioning mechanism 4, and a Y-axis. A pair of Y-axis engaging female members 35 of the positioning mechanism 5 are clamp bodies 10 provided on the base member 2, a pair of X-axis engaging male members 20, and a pair of Y-axis engagements, respectively. Provided in an arrangement corresponding to male member 30 It has been.

[0033] The clamp mechanism 3 includes the clamp body 10, the clamp engaging member 15, and a return hydraulic supply mechanism (not shown). The clamp body 10 includes a cylindrical member 50, an output member 51, a lid member 52, a plurality of ball members 53, and a clamp panel member 54. The cylindrical member 50 is formed with an upper small-diameter cylindrical portion 50a, a lower large-diameter cylindrical portion 50b, and a lower end flange portion 50c. The lower large-diameter cylindrical portion 50b and the lower end flange portion 50c are formed at the central portion of the base member 2. The upper small-diameter hole portion 2a and the lower large-diameter hole portion 2b are internally fitted.

[0034] A lid member 52 is further fitted into the lower large-diameter hole portion 2b, and the lid member 52 and the lower end flange portion 50c are fixed to the base member 2 by a plurality of bolts 55, and the upper surface of the lower large-diameter cylindrical portion 50b. And the upper surface of the base member 2 are substantially continuous, and the upper small-diameter cylindrical portion 50a protrudes upward from the base member 2. A plurality of horizontal holes 50d are formed in the upper portion of the upper small-diameter cylindrical portion 50a, and a plurality of ball members 53 are held in the horizontal holes 50d so as to be able to advance and retract, respectively.

[0035] The output member 51 has a rod portion 5 la and a piston portion 5 lb. The rod portion 5 la is slidably fitted in the upper small-diameter cylindrical portion 50a, and the piston portion 51b is fitted in the lower large-diameter cylindrical portion 50b. It is slidably fitted inside. At the upper part of the rod portion 51a, there are a plurality of groove-like pushing portions 51c that make line contact with the plurality of ball members 53 and push the plurality of ball members 53 outward, respectively. And a plurality of partially spherical receiving portions 5 Id that are connected downward from the pushing portion 51 c and receive the plurality of ball members 53 so as to be retracted inward.

[0036] The panel member 54 is configured by stacking a plurality of dish panels in the vertical direction, and is housed in an annular recess 51e formed in the piston portion 51. The panel member 54 includes an upper wall of the piston portion 51 and the lower large-diameter cylindrical portion 50b. The output member 51 is strongly urged downward. An oil chamber 55 is oil-tightly formed in a portion surrounded by the piston portion 51b, the lid member 52, and the lower large-diameter cylindrical portion 50b, and hydraulic pressure is supplied to the oil chamber 55 by a return hydraulic supply mechanism.

The clamp engaging member 15 is fixed to the lower surface side portion of the work pallet 9 with a plurality of bolts 16 inserted from the upper surface side of the work pallet 9. A through-hole 15a is formed in the clamp engaging member 15, and a plurality of engaging recesses 15b in which a plurality of ball engaging portions 53 are respectively engaged with an upper end portion of the clamp engaging member 15 facing the through-hole 15a. A plurality of engaging recesses 15b that are inclined so as to move downward toward the axial center side are formed. [0038] The X-axis positioning mechanism 4 includes the pair of X-axis engaging male members 20, a pair of X-axis engaging female members 25, and a pair of X-axis relief grooves 29. Each X-axis engaging male member 20 is formed in an elongated shape in the X direction, and includes a convex portion 20A, an X-axis tapered engaging portion 20a formed on the upper end portion of the convex portion 20A and having a width in the X direction that decreases upward, It has an elastically deformable X-axis elastic plate portion 20b extending from the lower end portion of the shaft teno engaging portion 20a (convex portion 20A) to both sides in the X direction.

[0039] A mounting recess 2c having substantially the same shape as that of the X-axis engaging male member 20 is formed on the upper surface side portion of the base member 2, and the X-axis elastic plate portion 20b is fitted into the mounting recess 2c. Both ends of the X-axis elastic plate portion 20b in the X direction are fixed with a pair of bolts 21. Thus, the X-axis engaging male member 20 is fixed to the vicinity of the upper surface of the base member 2 with the bolt 21 so that the upper surface of the X-axis elastic plate portion 20b and the upper surface of the base member 2 are substantially continuous. The pair of bolts 21 are inserted into the base member 2 by a lower surface side force, and their upper ends are screwed to the X-axis elastic plate portion 20b.

[0040] The pair of X-axis relief grooves 29 allow minute elastic deformation of the pair of X-axis engagement male members 20 to the lower side of the X-axis elastic plate portion 20a. Of the upper surface side portion of the base member 2, the portion facing the X-axis elastic plate portion 20a, that is, the bottom of the mounting recess 2c is recessed with an appropriate width in the X direction so that the X-axis elastic plate portion 20a can be elastically deformed appropriately. Has been.

[0041] Each X-axis engaging female member 25 is formed in an elongated shape in the X direction, and is formed in a recess 25A and a lower end portion of the recess 25A. The taper engagement portion 20a has an X-axis taper engagement recess portion 25a that is in close contact and engages with a clearance 28 from the upper wall surface of the recess 25A, and is in contact with the lower surface of the work pallet 9. Positioned with a pair of pins 26, both ends in the X direction are fixed with a pair of bolts 27. The pair of bolts 27 is also threaded through the work nort 9 and the lower end thereof is screwed into the X-axis engaging female member 25.

[0042] The Y-axis positioning mechanism 5 includes the pair of Y-axis engagement male members 30 and the pair of Y-axis engagement female members 35, and a pair of Y-axis escape grooves 39, and each Y-axis engagement The male member 30 has a Y-axis taper engagement portion 30a and a Y-axis elastic plate portion 30b, and each Y-axis engagement female member 35 has a Y-axis teno engagement recess 35a. Each Y-axis engaging male member 30, Y-axis engaging female member 35, Y-axis relief groove 39 has the same configuration as the X-axis engagement male member 20, X-axis engagement female member 25, and X-axis relief groove 29. And in detail, the direction Since it is only different, redundant description is omitted.

[0043] The Z-axis positioning mechanism 6 includes the four Z-axis reference members 40. These Z-axis reference members 40 are provided at the four positions spaced apart from each other on the upper surface of the base member 2, and The work pallet 9 is positioned in the Z direction by receiving the lower surface.

[0044] When the work pallet 9 is positioned and fixed to the base member 2 for explaining the effect 'effect of the work pallet positioning and fixing device 1 described above, first, the work pallet 9 is conveyed above the base member 2; Two pairs of engaging male members 20 and 30 of base member 2 and two pairs of engaging female members 25 and 35 of work pallet 9 and force S The clamp body 10 is inserted into the through hole 15a of the clamp engaging member 15 to operate the clamp mechanism 3.

[0045] By this clamping mechanism 3, the work pallet 9 is attracted downward and fixed to the base member 2, and at this time, the work pallet 9 is fixed to the base member 2 by the X, Υ, and Z axis positioning mechanisms 4, 5, 6. Are positioned in the X, Υ, and Z directions, respectively. At this time, in the X-axis positioning mechanism 4, the X-axis taper engagement portion 20 a of the X-axis engagement male member 20 fixed to the base member 2 is fixed to the work pallet 9. 25, the workpiece pallet 9 is positioned in the X direction by being closely engaged with the X-axis taper engagement recess 25a. In the Y-axis positioning mechanism 5, the Y-axis engagement male member 30 fixed to the base member 2 is The Y-axis teno engagement part 30a is closely engaged with the Y-axis taper engagement recess 35a of the Y-axis engagement female member 35 fixed to the work pallet 9, and the work pallet 9 is positioned in the Y direction. The

[0046] In the Z-axis positioning mechanism 6, the four Z-axis reference members 40 provided on the base member 2 receive the lower surface of the workpiece pallet 9, and the work pallet 9 is positioned in the Z direction. The taper engaging portions 20a, 30a of the male members 20, 30 are configured to be closely engaged with the taper engaging recesses 25a, 35a of the engaging female members 25, 35.

That is, when the work pallet 9 is attracted downward to the base member 2 by the clamp mechanism 3, the taper engagement portions 20a and 30a are closely attached to the taper engagement recesses 25a and 35a by the clamp force. The X-axis elastic plate portions 20b and 30b of the engaging male members 20 and 30 are slightly elastically deformed downward, and the lower surface of the work pallet 9 is received by the Z-axis reference member 40. The work pallet 9 is positioned and fixed in all directions of X, Υ, and Z.

[0048] According to this work pallet positioning and fixing device 1, in the X and Y axis positioning mechanisms 4 and 5, the engaging male members 20 and 30 are fixed to the base member 2 with bolts 21 and engaged. The female members 25 and 35 are fixed to the work pallet 9 with bolts 27, the engaging male members 20 and 30 are provided with elastic plate portions 20b and 30b, and the elastic plate portions 20b and 30b are slightly elastically deformed downward. Since the relief grooves 29 and 39 that allow the recesses are provided in the base member 2, the taper engaging portion 20a of the engaging male members 20 and 30 is secured when the clamp pallet 9 is attracted and fixed to the base member 2 by the clamp mechanism 3. , 3 Oa maintains the state of close engagement with the taper engagement recesses 25a, 35a of the engagement female members 25, 35, and the elastic plate portions 20b, 30b are slightly elastically deformed downward, so that X , Υ, Z-axis positioning mechanism 4, 5 and 6 are all functioned effectively, and the work pallet 9 is reliably positioned in all directions X, Y and Z on the base member 2. can do.

[0049] Then, by providing the relief grooves 29 and 39 in the base member 2, the engaging male members 20 and 30 can be formed in a simple shape, and the elastic plate portions 20b and 30b are reliably elasticated downward. It can be deformed, and the relief grooves 29 and 39 can be easily formed in the base member 2 with a simple shape, so that the structure of the X and Y axis positioning mechanisms 4 and 5 can be simplified, and the engaging male member Since the base member 2 having 20, 30, and relief grooves 29, 39 can be easily manufactured, it is advantageous in terms of manufacturing cost, and the force can be further simplified by the structure of the work pallet 9, and many work pallets can be used. Since the same applies to G9, the equipment cost can be reduced.

Further, the engaging male members 20 and 30 are fixed to the base member 2 with bolts 21, and the engaging female members 25 and 35 are fixed to the work pallet 9 with bolts 27 to engage the engaging male members 20. , 30, and the engaging female members 2 5 and 35 are provided, so fine adjustment is performed to ensure that the X and Y axis positioning mechanisms 4 and 5 function properly. Even when the members 25 and 35 are worn, the positioning function can be maintained by exchanging only the engaging male members 20 and 30 and the engaging female members 25 and 35.

[0051] Since the mounting recess 2c is formed in the base member 2, and the elastic plate portions 20b, 30b of the engaging male members 20, 30 are fitted into the mounting recess 2c, the engaging male members 20, 30 are used as the base. The elastic plate portions 20b and 30b can be securely positioned and assembled to the member 2, and the elastic plate portions 20b and 30b can be provided without projecting upward from the base member 2, and both end portions of the elastic plate portions 20b and 30b are attached. Since the bolt 21 is fixed to the recess 2c and the escape groove 29 is provided in the bottom of the mounting recess 2c, the elastic plate portion 20b, 30b can be reliably elastically deformed downward.

[0052] The fixing bolt 21 for the engaging male members 20, 30 is also passed through the base member 2 with the lower surface side threaded, and the upper end of the bolt 21 is screwed into the elastic plate portions 20b, 30b. Without exposing the bolt 21 to the upper surface side of the base member 2, both end portions of the elastic plate portions 20b and 30b can be securely fixed to the mounting recess 2c.

[0053] It is also possible to provide a sealing member made of rubber or flexible synthetic resin, which can be compressed and deformed and can be restored in shape, accommodated in the escape grooves 29, 39. As a result, dust or dust such as a facet by intrusion enters the escape grooves 29 and 39 that do not hinder the elastic deformation of the elastic plate portions 20b and 30b of the engaging male members 20 and 30 downward. Can be reliably prevented.

[0054] The arrangement of the engaging male members 20, 30 and the engaging female members 25, 30 and the arrangement and number (three or more) of the Z-axis reference members 40 can be changed as appropriate. Alternatively, the mounting recess 2c may be omitted, and the engagement male members 20 and 30 may be simply abutted against the upper surface of the base member 2 and fixed with the bolts 21. Various existing clamping mechanisms may be adopted as the clamping mechanism 3. In addition, various modifications other than the above-described disclosure can be added and implemented.

Claims

The scope of the claims

[1] A base member, a Z-axis positioning mechanism, an X-axis positioning mechanism, a Y-axis positioning mechanism, and a base member for positioning the work pallet in the X and Y directions perpendicular to the vertical Z direction and the horizontal plane respectively. A work pallet positioning and fixing device having a clamping mechanism for attracting and fixing the work pallet downward

The Z-axis positioning mechanism includes at least three Z-axis reference members that are provided at at least three positions spaced apart from each other on the upper surface of the base member and receive the lower surface of the work pallet.

An X-axis taper engagement portion whose X-direction width decreases toward the upper side, and an X-axis elastic plate portion that is elastically deformable extending from the lower end portion of the X-axis taper engagement portion to both sides in the X direction, and of the base member An X-axis engaging male member fixed with bolts on the upper surface or in the vicinity of the upper surface;

A relief groove recessed in a portion of the upper surface side portion of the base member facing the X-axis elastic plate portion and allowing minute elastic deformation downward of the X-axis elastic plate portion;

An X-axis engagement female member having an X-axis taper engagement recess that is closely engaged with the X-axis taper engagement portion of the X-axis engagement male member and fixed to the lower surface of the work pallet with a bolt. Comprising the Y-axis positioning mechanism,

It has a Y-axis taper engaging portion whose Y-direction width decreases toward the top, and an elastically deformable Y-axis elastic plate portion extending from the lower end portion of this Y-axis taper engaging portion to both sides in the Y direction. A Y-axis engaging male member fixed with bolts on the upper surface or in the vicinity of the upper surface;

A relief groove that is recessed in a portion facing the Y-axis elastic plate portion of the upper surface side portion of the base member, and allows minute elastic deformation downward of the Y-axis elastic plate portion;

A Y-axis engagement female member having a Y-axis taper engagement recess that is engaged in close contact with the Y-axis engagement male member of the Y-axis engagement male member and fixed to the lower surface of the work pallet with a bolt. A positioning and fixing device for a work pallet characterized by comprising:

[2] The upper surface portion of the base member is formed with a mounting recess having substantially the same shape as that of the X-axis engaging male member, and the X-axis elastic plate portion of the X-axis engaging male member is fitted into the mounting recess. Both ends in the X direction are fixed with bolts, and elastic deformation of the X-axis elastic plate is allowed at the bottom of the mounting recess. The relief groove is recessed,

A mounting recess having substantially the same shape as the Y-axis engaging male member is formed on the upper surface portion of the base member, and the Y-axis elastic plate portion of the Y-axis engaging male member is fitted into the mounting recess so that the Y direction Both ends are fixed with bolts, and a relief groove that allows elastic deformation of the Y-axis elastic plate is recessed at the bottom of this mounting recess.

2. The work pallet positioning and fixing device according to claim 1, wherein the work pallet is positioned and fixed.

[3] A bolt for fixing the X-axis engaging male member is inserted into the base member by a lower surface side force, and an upper end portion of the bolt is screwed into the X-axis elastic plate portion.

A bolt for fixing the Y-axis engaging male member is inserted into the base member with a lower surface side force, and an upper end portion of the bolt is screwed into the Y-axis elastic plate portion.

The positioning / fixing device for a work pallet according to claim 2, wherein:

[4] The work pallet positioning and fixing device according to any one of [1] to [3], further comprising a compressible and deformable sealing member accommodated in the escape groove.