JP2014039972A - Object positioning fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an object positioning fixing device which can improve horizontal direction positioning accuracy, simplify and downsize a structure of a reference member to reduce manufacturing costs, simplify and quicken replacement of object bodies with respect to a base member, and the like.SOLUTION: In a positioning fixing device 1, a fixing mechanism 7 is provided with: a pull rod member 30 which projects downward from a pallet 3 and is engaged with the pallet 3 in the way that a driving force can be transmitted to be inserted through a first rod insertion hole 11 and a second rod insertion hole 16; a cylinder member 31 attached to a base member 2; an output member 32 which is retractably attached to the cylinder member 31 and in which the pull rod member 30 is inserted; a ball lock mechanism 33 which connects the pull rod member 30 and the output member 32 by advancement/retraction of the output member 32 in a cancelable manner; and a first driving mechanism 34 which connects the pull rod member 30 and the output member 32 via the ball lock mechanism 33 and drives the output member 32 in the way that the pallet 3 is attracted to the base member 2.

Description

  The present invention relates to an object positioning and fixing device that positions and fixes a target object on a base member in a horizontal direction and a vertical direction, and more particularly to an apparatus that attracts and fixes a target object to a base member via a plurality of pull rod members.

  2. Description of the Related Art Conventionally, various work pallets (target objects) for fixing a work to be machined and a work pallet positioning and fixing device for positioning and fixing the work pallet to a base member have been widely used.

  For example, in the object positioning and fixing device described in Patent Literature 1, a reference seating surface for vertical positioning is formed on the upper surface of the base member, and the base member has a diagonal portion in the vicinity of a pair of corners. A pair of reference members for horizontal positioning are provided. Each reference member includes a flange portion that is accommodated in a mounting hole of the base member and is fixed by a plurality of bolts, an engagement convex portion that protrudes upward from the center portion of the flange portion, and an outer peripheral surface of the engagement convex portion And a bolt hole formed in the engagement convex portion.

  A bolt insertion hole is formed in the work pallet at a position corresponding to the pair of reference members, and a head accommodation hole for accommodating the bolt head is formed in the upper part of the bolt insertion hole. An annular engaging member that can be engaged in close contact with the engaging convex portions of the pair of reference members is fixed to a mounting hole that is recessed on the bottom side of the work pallet.

  The work pallet is placed on the base member, and a pair of bolts is inserted into the pair of bolt insertion holes of the work pallet from above and screwed into the bolt holes of the pair of reference members. In a state where the lower surface of the work pallet is seated on the reference seating surface, a pair of corner portions of the work pallet are positioned and fixed to the base member in the vertical direction and the horizontal direction.

  For example, an object positioning and fixing device described in Patent Document 2 is for positioning and fixing a workpiece (target object) on a pallet. In this device, a workpiece receiving seat for vertical positioning is provided on the pallet. Is formed with a pin through hole, and a pin insertion hole is formed in the work receiving seat. The pin is inserted into the pin through hole and the pin insertion hole so that the clamp pin can be inserted from above, and the workpiece is attracted and fixed to the pallet via the clamp pin.

  For this purpose, a sleeve is attached to the pallet, a plunger is attached to the sleeve so as to be able to advance and retreat, and is urged downward by a disc spring, and a ball lock mechanism is provided on the clamp pin, the sleeve and the plunger. When the plunger is pushed up by the push-up mechanism, the clamp pin is set as described above, and when the plunger is lifted up, the clamp pin and the plunger are coupled via the ball lock mechanism by the urging force of the disc spring. The workpiece is attracted and fixed to the pallet via the pin and the plunger.

JP 2011-251376 A JP 2003-39263 A

  In the object positioning device as in Patent Document 1, when the vertical position of the engaging convex portion of the reference member with respect to the reference seating surface of the base member varies due to a manufacturing error, an intended horizontal positioning function is obtained. Absent. However, since it is extremely difficult to suppress the processing tolerance related to the depth of the mounting hole when forming the mounting hole for mounting the flange member of the reference member within about 5 μm, the reference member of the base member with respect to the reference seating surface of the base member is difficult. The height position of the engagement convex portion, that is, the height position of the taper engagement surface cannot be set with high accuracy. Therefore, there is a problem that it is difficult to ensure the positioning accuracy for positioning the work pallet in the horizontal direction with respect to the reference seating surface of the base member.

  In addition, since the flange part is formed on the reference member and the flange part is fixed to the attachment hole with a plurality of bolts, the attachment position for attaching the pair of reference members to the base member is restricted, and the reference member is complicated. There is also a problem that a large-sized member having a simple structure and its production cost (material cost, processing cost and assembly cost) become expensive.

  Moreover, when the work pallet is fixed to the base member and when it is released from the base member, manual work is required in which at least one pair of bolt insertion holes are inserted and tightened or loosened with a tool. In other words, the work of exchanging the work pallet with respect to the base member becomes very complicated and time consuming. In addition, a stable clamping force for fixing the work pallet to the base member cannot be obtained, which may cause a problem that the work pallet cannot be reliably positioned and fixed to the base member.

  Here, in this positioning and fixing device, as a fixing mechanism for fixing the work pallet to the base member, a bolt and a bolt insertion hole are omitted, and a mechanism having a clamp pin and a ball lock mechanism as in Patent Document 2 is adopted. Can be considered. However, if this fixing mechanism is provided independently of the positioning mechanism, both the positioning mechanism and the clamping mechanism cannot be arranged in a compact manner as a whole.

  The purpose of the present invention is to increase the horizontal positioning accuracy, to simplify and miniaturize the structure of the reference member to reduce the manufacturing cost, to simplify and speed up the exchange of the target object with respect to the base member, etc. It is to provide a feasible object positioning and fixing device.

  The invention according to claim 1 (object positioning fixing device) is an object positioning fixing device for positioning and fixing a target object on a base member in a horizontal direction and a vertical direction, wherein the base member is a reference for positioning in the vertical direction. A plurality of positioning mechanisms provided at a position spaced apart from each other so as to be able to position the target object in a horizontal direction. Each of the plurality of positioning mechanisms, and a plurality of fixing mechanisms that can be fixed by pressing the target object against the base member, and each of the positioning mechanisms is attached to one of the base member and the target object. An engagement convex portion, which is a reference member and has a tapered engagement surface that is smaller in diameter toward the distal end side, and is formed on the base end side of the engagement convex portion with a smaller diameter than the engagement convex portion. One of the target objects A fitting tube portion that is fitted into the fitting hole formed on the base plate, and a base end contact surface that is formed at the base end of the engagement convex portion and contacts one of the reference seat surface and the contact surface. A reference member; and an annular engagement member that is mounted in a mounting hole formed in the other of the base member and the target object and has a taper contact surface that can be engaged in close contact with the taper engagement surface, Each fixing mechanism is mounted so as to protrude from the target object to the base member side and engage with the target object so that a driving force can be transmitted, and to pass through a first rod insertion hole formed in the reference member and the base member. A pull rod member; a cylinder member attached to the base member; an output member that is movably attached to the cylinder member and into which the pull rod member is inserted; and the pull rod member, the cylinder member, and the output member. Due to the advance and retreat of the parts A ball lock mechanism that releasably couples the rod member and the output member, and a pull rod member and the output member that are coupled via the ball lock mechanism and that drives the output member to attract the target object to the base member. 1 drive means.

  When positioning and fixing the target object to the base member, the target object is set on the base member, and the plurality of annular engagement members of the target object are respectively engaged with the engagement convex portions of the plurality of reference members on the base member side. Combine. Then, the target object is pressed against the base member by the plurality of fixing mechanisms, and then the taper engagement surface of the engagement convex portion of the reference member to which the taper contact surface of each annular engagement member corresponds by the plurality of positioning mechanisms. The target object is positioned in the horizontal direction and the contact surface of the target object is in contact with the reference seating surface of the base member, so that the target object is positioned in the vertical direction. In each fixing mechanism, the pull rod member protrudes from the target object to the base member side, is engaged with the target object so as to be able to transmit a driving force, and is mounted so as to pass through the first rod insertion hole of the reference member and the base member When the output member is driven by the first driving means, the pull rod member and the output member are coupled via the ball lock mechanism, and the target object is attracted to the base member and fixed via the pull rod member and the output member. Is done.

  According to a second aspect of the present invention, in the first aspect of the invention, the pull rod member is mounted so as to pass through a second rod insertion hole formed in the target object, and is configured to be detachable from the base member and the target object. It is characterized by that.

  According to a third aspect of the present invention, in the second aspect of the invention, a head having a larger diameter than the second rod insertion hole is provided at an upper end portion of the pull rod member, and the head is disposed above the second rod insertion hole. It is characterized in that a head receiving hole for receiving the head is formed.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the output member is driven so as to release the coupling between the pull rod member and the output member coupled via the ball lock mechanism. It is characterized by having driving means.

  According to a fifth aspect of the invention, in the invention of any one of the first to fourth aspects, when the output member is driven so as to release the coupling between the pull rod member and the output member coupled via the ball lock mechanism. Further, the present invention is characterized in that an extrusion mechanism for extruding the pull rod member upward is provided.

  A sixth aspect of the invention is characterized in that, in the invention of any one of the first to fourth aspects, the first driving means is composed of a compression spring accommodated in the cylinder member.

  A seventh aspect of the present invention is the gas operation according to any one of the first to fourth aspects, wherein the first drive means is formed in a cylinder member by a cylinder member and an output member and filled with a compressed gas. It is characterized by comprising a gas spring having a chamber.

  The invention according to claim 8 is the first fluid passage portion formed in the pull rod member in order to supply fluid pressure to the fluid pressure device equipped in the target object in the invention according to any one of claims 1 to 4. It has the fluid passage which has.

  The invention of claim 9 is the invention of claim 8, wherein the fluid passage has a second fluid passage portion formed in the output member so as to communicate with the first fluid passage portion.

  According to a tenth aspect of the present invention, in the eighth aspect of the invention, the first fluid passage portion is configured to communicate with third and fourth fluid passage portions formed in the base member and the target object, respectively. It is characterized by.

  According to an eleventh aspect of the present invention, in the invention according to any one of the first to fourth aspects, the ball lock mechanism increases the driving force of the output member and transmits it to the pull rod member when the target object is attracted to the base member. It has a boosting mechanism.

  According to the present invention, each positioning mechanism is a reference member mounted on one of the base member and the target object, and an engagement convex portion formed with a taper engagement surface whose diameter decreases toward the distal end side; A fitting tube portion that is formed on the proximal end side of the engaging protrusion with a smaller diameter than the engaging protrusion and is fitted into a fitting hole formed in one of the base member and the target object, and the engaging protrusion A reference member formed at the base end of the portion and having a base end contact surface that contacts one of the reference seat surface and the contact surface; and a mounting hole formed in the other of the base member and the target object; Since the annular engagement member having the taper contact surface that can be engaged in close contact with the taper engagement surface is provided, the following effects can be obtained.

  Since the base end contact surface of the engagement convex portion is brought into contact with the reference seat surface or the contact surface, the accuracy of the height direction position of the engagement convex portion with respect to the reference seat surface or the contact surface is increased. Therefore, the positioning accuracy for positioning the target object in the horizontal direction with respect to the base member can be increased. Since the fitting cylinder part of the reference member is fitted and fixed in the fitting hole, and the fitting cylinder part has a smaller outer diameter than the engagement convex part, the structure of the reference member is simplified and miniaturized. Manufacturing costs (material costs, processing costs, assembly costs) can be greatly reduced.

  In addition, each fixing mechanism protrudes from the target object to the base member side and engages with the target object so as to be able to transmit a driving force so as to pass through the first rod insertion holes formed in the reference member and the base member. Pull rod member to be mounted, cylinder member attached to the base member, an output member to which the pull rod member is inserted so as to be able to advance and retreat to the cylinder member, and provided to the pull rod member, the cylinder member, and the output member. A ball lock mechanism that releasably couples the pull rod member and the output member by advancing and retreating the member; the pull rod member and the output member are coupled via the ball lock mechanism; and the output member is attracted to the base member Since the first driving means for driving is provided, the following effects can be obtained.

  When fixing the target object to the base member, a tool becomes unnecessary, that is, the manual work of tightening a plurality of bolts using a tool is unnecessary, and the fixing work of the target object can be automated. Further, a stable clamping force for fixing the target object to the base member can be obtained, and the target object can be stably positioned and fixed, so that the replacement of the target object with respect to the base member can be simplified and speeded up. . Further, since the positioning mechanism and the fixing mechanism corresponding to the positioning mechanism can be provided on the same axis, both the mechanisms can be arranged compactly as a whole.

It is a disassembled perspective view of the positioning fixing apparatus of Example 1 of this invention. It is principal part sectional drawing of the said positioning fixing device (fixed release state). It is principal part sectional drawing of the positioning fixing device (fixed state) of FIG. It is principal part sectional drawing of the positioning fixing apparatus containing a 2nd fixing mechanism. It is principal part sectional drawing of the positioning mechanism of the said positioning fixing device. It is principal part sectional drawing of the fixing mechanism of the said positioning fixing device. It is principal part sectional drawing of the positioning fixing apparatus (fixed release state) of Example 2. FIG. It is principal part sectional drawing of the positioning fixing device (fixed state) of FIG. It is principal part sectional drawing of the positioning fixing device of Example 3. FIG. It is principal part sectional drawing of the positioning fixing device of Example 4. FIG. It is principal part sectional drawing of the positioning fixing device of Example 5. FIG. It is principal part sectional drawing of the positioning fixing device of Example 6. FIG. It is principal part sectional drawing of the positioning fixing device of Example 7. FIG. It is principal part sectional drawing of the positioning fixing device (fixed release state) of Example 8. It is principal part sectional drawing of the positioning fixing device (fixed state) of FIG. It is principal part sectional drawing of the fixing mechanism of FIG. It is principal part sectional drawing of the positioning fixing device of Example 9. FIG. It is principal part sectional drawing of the positioning fixing apparatus of Example 10. FIG. It is sectional drawing of the positioning mechanism which concerns on a change form.

Hereinafter, modes for carrying out the invention will be described based on examples.
In the following embodiments, positioning in the horizontal direction means determining the position in the horizontal direction, and positioning in the vertical direction means determining the position in the vertical direction.

  As shown in FIGS. 1 to 4, the pallet positioning / fixing device 1 (which corresponds to an “object positioning / fixing device”, hereinafter referred to as a positioning / fixing device) holds a workpiece for machining on a base member 2. For this purpose, a work pallet 3 (this corresponds to a “target object”, hereinafter referred to as a pallet) is positioned and fixed in the horizontal direction and the vertical direction.

  The positioning and fixing device 1 includes a reference seat surface 4 formed on the upper surface of the base member 2 for positioning in the vertical direction, and a contact surface 5 formed on the lower surface of the pallet 3 and capable of contacting the reference seat surface 4. A pair of positioning mechanisms 6 that can position the pallet 3 in the horizontal direction, and a pair of fixing mechanisms 7 and a pair of second fixing mechanisms 8 that can fix the pallet 3 by pressing the pallet 3 against the base member 2. ing.

  Each of the base member 2 and the pallet 3 is formed of a square or rectangular thick steel flat plate member, and the entire upper surface of the base member 2 is formed as a smooth reference seating surface 4. The entire region is formed on a smooth contact surface 5. The base member 2 is set in a state of being fixed on a table or the like of a machine tool, for example. One or a plurality of workpieces (not shown) are fixed to the pallet 3 by a clamping device or a bolt (not shown), and the pallet 3 is conveyed onto the base member 2 and positioned and fixed in the horizontal direction and the vertical direction. Machining is performed on one or more workpieces on the pallet 3.

  In the base member 2, a pair of fitting holes 10 that open to the reference seating surface 4 and a lower end of the pair of fitting holes 10 are connected to a portion in the vicinity of the pair of corners having the diagonal relationship. A pair of first first rod insertion holes 11 in the vertical direction is formed, and other diagonal relations (different from the above-mentioned pair of corners) A pair of second first rod insertion holes 12 is formed. The reference member 20 of the pair of positioning mechanisms 6 is attached to the pair of fitting holes 10.

  The pallet 3 has a pair of mounting holes 15 that open to the contact surface 5 in the vicinity of a pair of corners that are in a diagonal relationship, and a vertical direction continuous to the upper ends of the pair of mounting holes 15. A pair of first second rod insertion holes 16 are formed and other diagonal relations (different from the above-mentioned pair of corners) are provided in the vicinity of the pair of corners. Two second rod insertion holes 17 are formed, and head receiving holes 16a and 17a are formed above the second rod insertion holes 16 and 17, respectively. An annular engagement member 25 of the pair of positioning mechanisms 6 is mounted in the pair of mounting holes 15.

  The fitting hole 10 has a larger diameter than the first rod insertion hole 11 and is concentric with the first rod insertion hole 11, and the mounting hole 15 is larger than the second rod insertion hole 16 and the fitting hole 10. It is formed in a diameter and concentric with the second rod insertion hole 16. The first rod insertion holes 11 and 12 and the second rod insertion holes 16 and 17 are formed to have substantially the same diameter, and the head receiving holes 16a and 17a are formed to have a larger diameter than the second rod insertion holes 16 and 17. Yes.

The positioning mechanism 6 will be described.
As shown in FIG. 1, the pair of positioning mechanisms 6 are disposed at positions spaced apart from each other in the horizontal direction. As shown in FIGS. 2, 3, and 5, each positioning mechanism 6 includes the base member 2. A reference member 20 mounted on the pallet 3 and an annular engagement member 25 mounted on the pallet 3 so as to be engageable with the reference member 20.

  The reference member 20 is formed in an annular shape (cylindrical shape), and has an engagement convex portion 21 formed with a tapered engagement surface 22 having a smaller diameter on the upper side (tip side), and a lower side of the engagement convex portion 21 ( The base end side is formed with a diameter smaller than that of the engaging convex portion 21 and fitted into the fitting hole 10 of the base member 2, and the lower end (base end) of the engaging convex portion 21. And a base end contact surface 24 that contacts the reference seating surface 4. The engaging convex part 21 and the fitting cylinder part 23 are integrally formed.

  The outer peripheral portion at the upper end of the engaging convex portion 21 is formed in a circular arc shape in cross section. The taper engagement surface 22 is formed in an annular shape over the entire circumferential direction. However, it is good also as a some taper engagement surface formed intermittently in the circumferential direction. The fitting cylinder portion 23 is press-fitted and fixed in the fitting hole 10 in a state where the base end contact surface 24 is in contact with the reference seat surface 4. However, the fitting tube portion 23 may be fixed to the fitting hole 10 by a fixing means other than press fitting. Note that a small gap is formed between the lower end of the fitting tube portion 23 and the bottom surface of the fitting hole 10 in a state where the base end contact surface 24 is in contact with the reference seat surface 4.

  The annular engagement member 25 is mounted in the mounting hole 15 of the pallet 3 and has a taper contact surface 26 that can be engaged in close contact with the taper engagement surface 22 of the reference member 20. The annular engagement member 25 is press-fitted and fixed to the mounting hole 15 with its upper end in contact with the upper end wall surface of the mounting hole 15. However, the annular engagement member 25 may be fixed to the mounting hole 15 by a fixing means other than press fitting. In the state where the upper end of the annular engagement member 25 is in contact with the upper end wall surface of the mounting hole 15, the lower end surface of the annular engagement member 25 is positioned slightly above the height position of the contact surface 5 of the pallet 3. To do.

  When the pallet 3 is pressed and fixed to the base member 2 by the fixing mechanism 7 (8), the annular engagement member 25 is configured to be elastically deformable in the diameter increasing direction. Therefore, the outer diameter of the lower half portion of the annular engagement member 25 is formed to be slightly smaller than the outer diameter of the upper half portion, and the outer peripheral surface of the lower half portion of the annular engagement member 25 and the inner peripheral surface of the mounting hole 15. An annular gap 27 for allowing (promoting) elastic deformation of the annular engagement member 25 in the diameter increasing direction is formed between the annular engagement member 25 and the annular engagement member 25.

The fixing mechanisms 7 and 8 will be described.
As shown in FIG. 1, the pair of fixing mechanisms 7 are attached to the pair of positioning mechanisms 6, respectively, and the pair of fixing mechanisms 7 and the pair of fixing mechanisms 8 are separated from each other in the horizontal direction. It is arranged.

  As shown in FIGS. 2, 3, and 6, each fixing mechanism 7 protrudes downward from the pallet 3 (base member 2 side) and engages the pallet 3 so as to be able to transmit a driving force so that the reference of the base member 2 can be obtained. A pull rod member 30 mounted so as to pass through the member 20 and the first rod insertion hole 11 and the second insertion hole 16 of the pallet 3, a cylinder member 31 attached to the base member 2, and the cylinder member 31 in the vertical direction. Provided in the output member 32, the pull rod member 30, the cylinder member 31, and the output member 32, which are mounted so as to be able to advance and retreat, and the pull rod member 30 and the output member 32 can be released by the advance and retreat of the output member 32. A ball lock mechanism 33 that is coupled to the pull rod member 30 and the output member 32 via the ball lock mechanism 33, and the pallet 3 is attracted to the base member 2. The output member 32 is driven upward so that the first drive mechanism 34 that drives the output member 32 downward and the pull rod member 30 and the output member 32 coupled via the ball lock mechanism 33 are released. And a second drive mechanism 35.

  The pull rod member 30 is configured to be detachable from the base member 2 and the pallet 3. The pull rod member 30 is slightly longer than the total thickness of the vertical thickness of the base member 2 and the vertical thickness of the pallet 3, and most of the pull rod member 30 is formed to have a slightly smaller diameter than the first and second rod insertion holes 11 and 16. In addition, a head 30 a having a larger diameter than the second rod insertion hole 16 (that is, the most part of the pull rod member 30) is provided at the upper end portion of the pull rod member 30. The head 30a is received in the head receiving hole 16a of the pallet 3 and engaged with the bottom surface 16b of the head receiving hole 16a, so that the pull rod member 30 can transmit driving force to the pallet 3, and this state Thus, the lower portion of the pull rod member 30 protrudes downward from the base member 2.

  The cylinder member 31 includes a cylinder main body 40 and a lower end wall member 41 that is screwed into the lower end portion of the cylinder main body 40 in an inner fitting manner. The cylinder body 40 includes a cylinder tube portion 40a, an upper end wall portion 40b positioned on the upper end side of the cylinder tube portion 40a, and a convex screw portion 40c protruding upward from a central portion of the upper end wall portion 40b. A rod insertion hole 40d having a larger diameter than the pull rod member 30 and oriented in the vertical direction is formed in the portion 40b and the convex screw portion 40c.

  Here, the base member 2 has a pair of screw holes 13 connected to the lower ends of the pair of first rod insertion holes 11 and a pair of screw holes connected to the lower ends of the other pair of first rod insertion holes 12. 14 are formed so as to open on the lower surface of the base member 2. The cylinder body 40 is fixed to the base member 2 in a state where the convex screw portion 40 c is screwed into the screw hole 13 and the upper end wall portion 40 b is in contact with the lower surface of the base member 2.

  The output member 32 has a piston portion 32a, an output rod portion 32b extending upward from the piston portion 32a, and an output cylinder portion 32c extending upward from the upper end portion of the output rod portion 32b and having a smaller diameter than the output rod portion 32b. And the rod insertion hole 32d in which the lower end part of the pull rod member 30 is inserted is formed in this output cylinder part 32c. The piston portion 32a is slidably fitted in the cylinder tube portion 40a, the output tube portion 32c is slidably fitted in the rod insertion hole 40d of the upper end wall portion 40b, and the upper end portion of the output rod portion 32b is the upper end portion. When contacting the lower end surface of the wall 40b, the output member 32 is in the upper limit position.

  The ball lock mechanism 33 includes a plurality of (for example, two or three) balls 45 (steel balls) and a plurality of ball holding holes formed on the output cylinder portion 32c to hold the plurality of balls 45 movably in the radial direction. 46, an annular relief groove 47 formed on the inner peripheral portion of the upper end wall portion 40b for releasing the plurality of balls 45 radially outward, and a plurality of balls formed on the lower end portion of the pull rod member 30 and moving radially inward And an annular groove 48 with which 45 is engaged.

  The first drive mechanism 34 includes a compression spring 50 (for example, a coil spring or a disc spring) housed in the cylinder member 31. The compression spring 50 is externally mounted on the output rod portion 32b and is mounted between the piston portion 32a and the upper end wall portion 40b to urge the output member 32 downward with a relatively strong urging force.

  The second drive mechanism 35 includes a fluid pressure cylinder 55 that can drive the output member 32 upward. The fluid pressure cylinder 55 has a piston portion 32 a and a fluid pressure working chamber 56 surrounded by the piston portion 32 a and the cylinder member 31, and a fluid pressure higher than a predetermined pressure is supplied to the fluid pressure working chamber 56. Then, the output member 32 is driven upward against the urging force of the compression spring 50. A fluid pressure port 57 is formed in the lower end wall member 41, and the space between the piston portion 32a and the cylinder tube portion 40a, and the space between the lower end wall member 41 and the cylinder tube portion 40a are sealed by annular seals 58a and 58b, respectively. ing.

  As shown in FIG. 4, each fixing mechanism 8 is different from the fixing mechanism 7 except for the first and second insertion holes 12 and 17 through which the pull rod member 30 is inserted. Since it is the same structure, it attaches | subjects the same code | symbol as the fixing mechanism 7, and abbreviate | omits description.

Next, the operation and effect of the positioning and fixing device 1 will be described.
The base member 2 is set and fixed in advance on a table or the like of a machine tool. In a state in which one or a plurality of workpieces are attached to the pallet 3 at the workpiece preparation stage, the pallet 3 is transported above the base member 2 and placed close to the reference seating surface 4 on the upper surface of the base member 2. At this time, the pair of annular engagement members 25 on the pallet 3 side is lightly engaged with the engagement convex portions 21 of the pair of reference members 20 on the base member 2 side.

  Thereafter, the pallet 3 is pressed and fixed to the base member 2 by the four fixing mechanisms 7 and 8. Then, the contact surface 5 of the pallet 3 comes into close contact with the reference seating surface 4 of the base member 2, and the pallet 3 is positioned in the vertical direction with respect to the base member 2. The engagement members 25 are elastically deformed toward the diameter-enlarging side, and the taper contact surfaces 26 are fixedly engaged with and fixed to the taper engagement surfaces 22 of the pair of reference members 20. Is positioned with respect to the base member 2 in the horizontal direction.

  In the fixing mechanism 7 (8), the pallet 3 is transported and placed on the reference seating surface 4 of the base member 2 with the pull rod member 30 removed from the base member 2 and the pallet 3. Thereafter, as shown in FIG. 2, the output member 32 is driven upward by the second drive mechanism 35 (fluid pressure cylinder 55) to move to the upper limit position. Then, in the ball lock mechanism 33, the height positions of the plurality of balls 45 and the annular relief groove 47 are brought into agreement. In this state, the pull rod member 30 is mounted so as to be inserted into the first and second insertion holes 11 and 16 from the upper side of the pallet 3.

  Then, the pull rod member 30 is inserted into the output cylinder portion 32c of the output member 32, where a plurality of balls 45 are retracted into the annular relief groove 47, and the insertion of the pull rod member 30 into the output cylinder portion 32c is completed. The head 30 a of the member 30 is received in the head receiving hole 16 a and engaged with the bottom surface portion 16 b, and the height position of the upper portion of the annular groove 48 of the pull rod member 30 becomes the height position of the plurality of balls 45. . Next, the drive of the output member 32 by the second drive mechanism 35 is released.

  Then, as shown in FIG. 3, the output member 32 is driven downward by the first drive mechanism 34 (compression spring 50). The plurality of balls 45 are driven downward together with the output member 32, where the plurality of balls 45 move below the annular relief groove 47 and are pushed radially inward by the inner peripheral wall of the rod insertion hole 40 d of the cylinder body 40. It is moved and engages with the annular groove 48 of the pull rod member 30. Finally, the plurality of balls 45 are engaged with the lower ends of the annular grooves 48, and the driving force of the output member 32 is transmitted to the pull rod member 30 via the plurality of balls 45. The pull rod member 30 causes the pallet 3 to move. The base member 2 is strongly attracted and fixed.

  When the pallet 3 is released from the base member 2, the output member 32 is again driven upward by the second drive mechanism 35 (fluid pressure cylinder 55) and moved to the upper limit position. Then, since the height positions of the plurality of balls 45 and the annular relief groove 47 coincide with each other, the plurality of balls 45 are retracted into the annular relief groove 47 in the same manner as when the pull rod member 30 is mounted, and the pull rod member 30 is moved to the pallet. 3 can be pulled out upward.

  According to the positioning and fixing device 1 described above, first, in the positioning mechanism 6, the fitting cylinder portion 23 of each reference member 20 is fitted and fixed to the fitting hole 10 of the base member 2, so that the reference member 20 is made into the base. Since the fitting cylinder portion 23 has a smaller outer diameter than the engagement convex portion 21, the flange portion for fixing the reference member 20 to the base member 2 and the flange portion are fixed. Therefore, it is not necessary to provide a plurality of bolts, so that the reference member 20 can be simplified and miniaturized to greatly reduce manufacturing costs (material costs, processing costs, assembly costs). And since there is no flange part, the freedom degree at the time of arrange | positioning the reference | standard member 20 to the base member 2 also becomes large.

  In the reference member 20, the base end abutting surface 24 is formed at the lower end of the engaging convex portion 21, and the base end abutting surface 24 is in contact with the reference seating surface 4. The position in the height direction of the joint convex portion 21 can be set with high accuracy. Therefore, the positioning accuracy for positioning the pallet 3 in the horizontal direction can be increased. Further, since the elastic deformation of the annular engagement member 25 can be promoted through the annular gap 27 having a simple configuration formed between the annular engagement member 25 and the inner peripheral surface of the mounting hole 15, the taper contact thereof. The surface 26 can be securely engaged with and fixed to the taper engaging surface 22 of the engaging convex portion 21.

  Next, in the fixing mechanism 7, the pull rod member 30 is inserted through the first rod insertion hole 11 formed in the reference member 20 and the base member 2 and the second rod insertion hole 16 formed in the pallet 3. And the first drive mechanism 34 drives the output member 32 so as to couple the pull rod member 30 and the output member 32 via the ball lock mechanism 33 and attract the pallet 3 to the base member 2. Is fixed to the base member 2, first, the positioning mechanism 6 and the fixing mechanism 7 are arranged coaxially, that is, the two mechanisms 6 and 7 are arranged in a compact manner as a whole. be able to.

  In addition, when the pallet 3 is fixed to the base member 2 and when the pallet 3 is released, the manual operation of tightening or loosening the bolts with a tool as in the prior art becomes unnecessary. Work and unlocking work can be automated. Further, by arranging the positioning mechanism 6 and the fixing mechanism 7 on the same axis, it is possible to give the pallet 3 a force for attracting it to the base member 2 so that the positioning mechanism 6 functions more appropriately. Further, by automating the fixing operation of the pallet 3, a stable clamping force for fixing the pallet 3 to the base member 2 can be obtained, and the pallet 3 can be stably positioned and fixed. Therefore, the exchange of the pallet 3 with respect to the base member 2 can be simplified and speeded up.

  Next, another embodiment in which the first embodiment is partially changed will be described. However, regarding the configuration of another embodiment, even if the size and shape are slightly different from the configuration of the above embodiment, the same reference numerals are given to the basically same configuration as the above embodiment, and Similar components are denoted by similar reference numerals, and detailed description thereof is omitted as appropriate.

  As shown in FIGS. 7 and 8, in the positioning and fixing device 1 </ b> A of the second embodiment, the fixing mechanism 7 </ b> A includes the pull rod member 30 and the output member 32 </ b> A coupled by the second drive mechanism 35 via the ball lock mechanism 33. When the output member 32A is driven upward so as to release the coupling, an extrusion mechanism 60 that pushes the pull rod member 30 upward is provided.

  The output member 32A has a piston portion 32Aa, an output rod portion 32Ab, and an output cylinder portion 32Ac, and a vertically-oriented insertion hole that communicates with the piston portion 32Aa and the output rod portion 32Ab in the rod insertion hole 32Ad of the output cylinder portion 32Ac. 32Ae is formed, and a screw hole 32Af connected to the lower end of the insertion hole 32Ae is formed in the piston portion 32Aa.

  The extruding mechanism 60 has an extruding rod 61. The extruding rod 61 is inserted into the insertion hole 32Ae from below, and a large-diameter screw portion 61a formed on the lower end side of the extruding rod 61 is a screw hole 32Af of the piston portion 32Aa. And is fixed by screwing. The upper end portion of the push rod 61 protrudes into the rod insertion hole 32Ad of the output cylinder portion 32Ac so that it can come into contact with the lower end portion of the pull rod member 30.

  As shown in FIG. 7, the pallet 3 is transported and placed on the reference seating surface 4 of the base member 2, and the output member 32A is driven upward by the second drive mechanism 35 and moved to the upper limit position. The pull rod member 30 is mounted so as to be inserted into the first and second insertion holes 11 and 16 from the upper side of the pallet 3. Then, the lower end portion of the pull rod member 30 comes into contact with the upper end portion of the push rod 61, and the pull rod member 30 is set in a state protruding slightly from the pallet 3. Thereafter, the output member 32A is driven by the second drive mechanism 35. To release.

  Then, as shown in FIG. 8, the output member 32A is driven downward by the first drive mechanism 34. First, the pull rod member 30 is lowered together with the output member 32A (extrusion rod 61). 45 is pushed radially inward by the inner peripheral wall of the rod insertion hole 40 d of the cylinder body 40 and engages with the annular groove 48 of the pull rod member 30. Thereafter, the head 30a of the pull rod member 30 is received in the head receiving hole 16a and engages with the bottom surface portion 16b, and the pull rod member 30 is lowered and stopped, but the output member 32A is further lowered. Thus, finally, the plurality of balls 45 are engaged with the lower ends of the annular grooves 48, and the pallet 3 is strongly attracted and fixed to the base member 2 by the pull rod member 30.

  When the pallet 3 is unfixed from the base member 2, the output member 32A is again driven upward by the second drive mechanism 35 (fluid pressure cylinder 55) and moved to the upper limit position. At that time, contrary to the above, the output member 32A (extrusion rod 61) rises, the lower end portion of the pull rod member 30 comes into contact with the upper end portion of the extrusion rod 61, the pull rod member 30 also rises, and finally, The pull rod member 30 protrudes slightly from the pallet 3 (see FIG. 7). Therefore, the pull rod member 30 can be easily removed.

  The push rod 61 is omitted, and the portion corresponding to the upper end portion of the push rod 61 is adjusted, for example, by adjusting the depth of the rod insertion hole 32d in the output member 32 of the first embodiment. You may comprise by the bottom face part. That is, the configuration of the extrusion mechanism can be simplified. When it is desired to increase the push-out amount of the pull rod member 30, the push-out rod 61 can be slidably mounted on the output member 32A, and the push-out rod 61 can receive the fluid pressure of the fluid pressure cylinder 55 and protrude further upward. You may comprise as follows.

  As shown in FIG. 9, in the positioning / fixing device 1B according to the third embodiment, the first drive mechanism 34B of the fixing mechanism 7B is not a compression spring 50 as in the above-described embodiment, but a cylinder member 31B and an output member 32B. The gas spring 65 includes a gas working chamber 66 formed in the member 31B and filled with compressed gas (for example, compressed nitrogen gas).

  The cylinder member 31B includes a cylinder main body 40B and a lower end wall member 41B. The cylinder main body 40B is formed to have a length shorter than that of the cylinder main body 40 of the first embodiment. Through-holes 41Ba are formed. The output member 32B has an output cylinder portion 32Bc that forms a piston portion 32Ba, an output rod portion 32Bb, and a rod insertion hole 32Bd, and further extends downward from the piston portion 32Ba to slide into the through hole 41Ba of the lower end wall member 41B. It has base end shaft-like part 32Be fitted inside freely. A gas working chamber 66 of the gas spring 65 is formed on the upper side of the piston portion 32Ba. Between the output cylinder portion 32Bc and the upper end wall portion 40Bb of the cylinder main body 40B, between the base end shaft-like portion 32Be and the lower end wall member 41B. These are sealed by annular seals 68a and 68b, respectively.

  A gas passage 67 for filling (replenishing) compressed gas to the gas working chamber 66 from an external gas pressure supply source (not shown) is formed in the piston portion 32Ba and the base end shaft-like portion 32Be of the output member 32B. A gas valve 67 at the lower end of the end shaft portion 32Be is equipped with a sealing valve member 67a that seals the compressed gas in the gas working chamber 66 and can supply the compressed gas from the outside. In the lower end wall member 41B, a fluid pressure port 57B is formed at a portion that does not adversely affect the formation of the through hole 41Ba. With the gas spring 65, a strong fixing force can be maintained, and the longitudinal length of the fixing mechanism 7B together with the first drive mechanism 34 can be reduced.

  As shown in FIG. 10, in the positioning / fixing device 1 </ b> C of the fourth embodiment, the fixing mechanism 7 </ b> C omits the second drive mechanism 35 of the first embodiment and outputs the pull rod member 30 coupled via the ball lock mechanism 33. The output member 32 can be moved upward so that the member 32 is manually uncoupled.

  The cylinder member 31C has a cylinder body 40 and a lower end wall member 41C. The fluid pressure port 57 of the first embodiment is omitted from the lower end wall member 41C, and instead, a screw hole 70 in the vertical direction is penetrating. Is formed. Further, the annular seals 58a and 58b of the first embodiment are also omitted. A push bolt 71 is screwed into the screw hole 70, and the upper end portion of the push bolt 71 is in contact with the lower end portion of the output member 32. A square hole 71a (for example, a hexagonal hole) with which the tool is engaged is formed in the lower portion of the push bolt 71.

  That is, according to the fixing mechanism 7C, the push bolt 71 is rotated using a tool, and the output part 32 is moved in the vertical direction, so that the fixing operation and the fixing releasing operation can be performed. Although such an operation is a manual operation, a stable clamping force for fixing the pallet 3 to the base member 2 can be obtained by the first drive mechanism 34. Further, by omitting the second drive mechanism 35, the fixing mechanism 7C can be simplified.

  As shown in FIG. 11, in the positioning / fixing device 1 </ b> D according to the fifth embodiment, the fixing mechanism 7 </ b> D omits the second drive mechanism 35 according to the first embodiment and outputs the pull rod member 30 coupled via the ball lock mechanism 33. The output member 32 can be driven upward so that the coupling between the member 32 and the member 32 can be released by an external driving means (for example, a fluid pressure cylinder).

  The cylinder member 31D has a cylinder body 40 and a lower end wall member 41D. The lower end wall member 41D omits the fluid pressure port 57 of the first embodiment, and instead has a through hole 75 extending in the vertical direction. Is formed. Further, the annular seals 58a and 58b of the first embodiment are also omitted. The output member 32D includes a piston portion 32a, an output rod portion 32b, an output cylinder portion 32c that forms a rod insertion hole 32d, and an operated rod portion 32De that extends downward from the piston portion 32a. The rod portion 32De passes through the insertion hole 75 of the lower end wall member 41D and protrudes downward from the lower end wall member 41D.

  According to this fixing mechanism 7D, the output member 32D can be driven upward by an external driving means, and the pull rod member 30 and the output member 32D coupled via the ball lock mechanism 33 can be uncoupled. The drive by the external drive means is released, the output member 32D is driven downward by the first drive mechanism 34, the pull rod member 30 and the output member 32D are coupled via the ball lock mechanism 33, and the pallet 3 is It can be attracted to the base member 2. The fixing mechanism 7D can be simplified by automating the fixing / unfixing operation of the pallet 3 using the external driving means and omitting the second driving mechanism 35.

  As shown in FIG. 12, in the positioning / fixing device 1E according to the sixth embodiment, the fixing mechanism 7E is used to supply fluid pressure to a fluid pressure device (for example, a clamp device that clamps a workpiece) provided on the pallet 3. The fluid passage 80 includes a first fluid passage portion 81 formed in the pull rod member 30E, and a second fluid passage portion formed in the output member 32E so as to communicate with the first fluid passage portion 81. 82. An annular seal 83 that seals between the pull rod member 30E and the cylinder body 40 is attached to the lower end of the pull rod member 30E.

  This fixing mechanism 7E is configured based on the fixing mechanism 7D (see FIG. 11) of the fifth embodiment. That is, the same effect as that of the fixing mechanism 7D of the fifth embodiment is obtained, and the fluid path 80 is formed by using the fixing mechanism 7E, and the pallet 3 is installed from the external fluid pressure supply source via the fluid path 80. The fluid pressure can be orderly supplied to the fluid pressure device. Reference numeral 84 denotes a coupler to which a fluid pressure hose or the like extending from the clamp device is connected. The coupler 84 is screwed into the head receiving hole 16Ea in an internally fitted manner. Therefore, the head receiving hole 16Ea is formed with a larger diameter than the head receiving hole 16a of the first embodiment.

  As shown in FIG. 13, in the positioning and fixing device 1 </ b> F according to the seventh embodiment, the fixing mechanism 7 </ b> F includes a fluid passage 85 for supplying fluid pressure to a fluid pressure device (for example, a clamp device) provided on the pallet 3. The fluid passage 85 has a first fluid passage portion 86 formed in the pull rod member 30F, and the first and second fluid passage portions 86 are formed in the base member 2 and the pallet 3, respectively. The passage portions 87 and 88 are configured to communicate with each other.

  In the vicinity of the upper and lower portions of the connecting portions of the first and third fluid passage portions 86 and 87, the base member 2 is provided with annular seals 89a and 89b for sealing between the base member 2 and the pull rod member 30F. In the vicinity of the upper and lower sides of the connecting portions of the first and fourth fluid passage portions 86 and 88, the pallet 3 is provided with annular seals 89c and 89d for sealing between the pallet 3 and the pull rod member 30F.

  A fluid passage 85 (first fluid passage portion 86) is formed by using the fixing mechanism 7F, and the third and fourth fluid passage portions 87 and 88 formed in the fluid passage 85, the base member 2 and the pallet 3. Thus, the fluid pressure can be regularly supplied from the external fluid pressure supply source to the fluid pressure equipment provided in the pallet 3.

  In the fixing mechanism 7F, the first and second drive mechanisms 34F and 35F are constituted by a return-type fluid pressure cylinder 90 capable of driving the output member 32F in both the up and down directions. In order to configure the fluid pressure cylinder 90, between the piston portion 32Fa of the output member 32F and the cylinder body 40F, between the output rod portion 32Fb of the output member 32F and the cylinder body 40F, the cylinder body 40F and the lower end wall portion 41F. Annular seals 91a, 91b, 91c for sealing between the two are mounted.

  As shown in FIGS. 14 to 16, in the positioning and fixing device 1 </ b> G according to the eighth embodiment, the ball locking mechanism 33 </ b> G of the fixing mechanism 7 </ b> G increases the driving force of the output member 32 </ b> G when attracting the pallet 3 to the base member 2. A force-increasing mechanism 92 (see FIG. 16) that transmits to the pull rod member 30 is provided. In order to configure the force-increasing mechanism 92, the cylinder member 31G and the output member 32G of the fixing device 7G have a slightly different structure from that of the first embodiment.

  The cylinder member 31G includes a cylinder main body 40G and a lower end wall member 41. The cylinder main body 40G includes a cylinder tube portion 40Ga, an upper end wall portion 40Gb, and a convex screw portion 40Gc. The upper end wall portion 40Gb and the convex screw portion 40Gc A rod insertion hole 40Gd is formed, and this rod insertion hole 40Gd is formed to have a slightly larger diameter than the pull rod member 30. The cylinder member 31G (cylinder cylinder portion 40Ga) is configured to have a smaller diameter than the cylinder member 31 of the first embodiment.

  The cylinder body 40G further has a cylinder part 40Ge protruding downward from the upper end wall part 40Gb. The inside of the cylinder body 40G communicates with the rod insertion hole 40Gd, and the lower end part of the pull rod member 30 is slidable to the cylinder part 40Ge. Fitted inside. The first drive mechanism 34G is composed of a compression spring 50G that is smaller than the compression spring 50 of the first embodiment. Therefore, as described above, the cylinder member 31G can have a small diameter, and in cooperation with the force-increasing mechanism 92, the first drive mechanism 34G A clamping force can be obtained.

  The output member 32G has a piston part 32a and an output rod part 32Gb. An output cylinder part 32Gc is formed on the upper part of the output rod part 32Gb, and the output cylinder part 32Gc is slidable on the cylinder part 40Ge of the cylinder body 40G. When the output cylinder portion 32Gc is fitted over the upper end wall portion 40Gb of the cylinder main body 40G, the output member 32G becomes the upper limit position.

  The ball lock mechanism 33G includes a plurality of (for example, two or three) balls 45G (steel balls) and a plurality of balls formed on the cylinder portion 40Ge of the cylinder body 40G to hold the plurality of balls 45G movably in the radial direction. A holding hole 46G, an annular relief groove 47G formed on the inner peripheral portion of the output cylinder portion 32Gc of the output member 32G, and the plurality of balls 45G to escape radially outward, and an annular concave groove 48 of the pull rod member 30 are provided.

  In the fixing mechanism 7G, as shown in FIG. 14, the output member 32G is driven upward by the second drive mechanism 35 (fluid pressure cylinder 55) to move to the upper limit position, and the plurality of balls 45G and the annular relief groove 47G are moved. The pull rod member 30 is mounted so as to be inserted into the first and second insertion holes 11 and 16 from the upper side of the pallet 3 in a state where the height positions of the pallet 3 are matched. Release the drive.

  Then, as shown in FIGS. 15 and 16, the output member 32G is driven downward by the first drive mechanism 34G (compression spring 50G), that is, the annular relief groove 47G is also moved downward. Then, the plurality of balls 45G are pushed radially inward by the taper pushing portion 47Ga formed on the upper end side of the annular relief groove 47G of the output cylinder portion 32Gc, and the diameter of the plurality of balls 45G is pushed radially inward. Engages with the groove 48. Finally, the plurality of balls 45 engage with the taper pushing portion 47Ga and the taper receiving portion 48a formed in the lower end portion of the annular groove 48 of the pull rod member 32 and having a larger diameter toward the lower portion, and the output member 32G. Is transmitted to the pull rod member 30 through the plurality of balls 45G.

  Here, the force-increasing mechanism 92 is configured by the taper pushing portion 47Ga and the taper receiving portion 48a. That is, the taper pushing portion 47Ga and the taper receiving portion 48a cooperate to increase the driving force of the output member 32G and transmit it to the pull rod member 30 when the pallet 3 is attracted to the base member 2 by a so-called wedge function. .

  As shown in FIG. 17, in the positioning and fixing device 1H according to the ninth embodiment, the structure of the cylinder member 31H of the fixing mechanism 7H and the structure for mounting to the base member 2 are changed. The cylinder member 31H includes a cylinder body 40H and a lower end wall member 41. The cylinder body 40H includes a cylinder tube portion 40Ha and an upper end wall portion 40Hb. The convex screw portion 40c of the first embodiment is omitted, and the upper end wall is omitted. A rod insertion hole 40Hd is formed in the portion 40Hb.

  The cylinder body 40H further includes a flange portion 40Hc provided on the upper end wall portion 40Hb, and is fixed by a plurality of bolts 95 in a state where the flange portion 40Hc is in contact with the lower surface of the base member 2. The screw hole 13 of the first embodiment is omitted from the base member 2, and the first rod insertion hole 11 </ b> H is formed so as to open on the lower surface of the base member 2.

  As shown in FIG. 18, in the positioning and fixing device 1 </ b> I of the tenth embodiment, the structure of the cylinder member 31 </ b> I of the fixing mechanism 7 </ b> I and the mounting structure to the base member 2 are changed as in the ninth embodiment. The cylinder member 31I has a cylinder main body 40I and a lower end wall member 41. The cylinder main body 40I has a cylinder tube portion 40Ia and an upper end wall portion 40Ib. The convex screw portion 40 of the first embodiment is omitted, and the upper end wall is omitted. A rod insertion hole 40Id is formed in the portion 40Ib.

  In the base member 2, the screw hole 13 of the first embodiment is omitted. Instead, the cylinder mounting hole 13I is formed to open to the lower surface of the base member 2, and the first rod insertion hole 11I is a cylinder mounting hole. It is formed to be continuous with the upper end of 13I and is shortened. The cylinder member 31I (cylinder main body 40I) is inserted into the cylinder mounting hole 13I from the lower side, and the upper end wall portion 40Ib of the cylinder main body 40I is in contact with the upper end wall surface of the cylinder mounting hole 13I from above the base member 2. It is fixed by a plurality of inserted bolts 96.

  Thus, the cylinder member 31I can be compactly attached to the base member 2 so as to suppress the amount of the cylinder member 31I projecting downward from the base member 2, and the length of the pull rod member 30I of the fixing mechanism 7I is shortened. be able to. The heads of the plurality of bolts 96 are accommodated in a plurality of bolt head accommodation holes 96 a formed in the base member 2 so as not to protrude upward from the upper surface of the base member 2.

  In addition, although Example 2-10 has shown the structure which changed the fixing mechanism 7 of Example 1, you may change the 2nd fixing mechanism 8 of Example 1 similarly.

In addition, you may change the said Examples 1-10 as follows.
(1) As shown in FIG. 19, the base member 2 is provided with a mounting hole 15J opened in the reference seating surface 4 and a first rod insertion hole 11J connected to the lower end of the mounting hole 15J. A fitting hole 10J opened in the contact surface 5 and a second rod insertion hole 16J connected to the upper end of the fitting hole 10J are formed. The positioning mechanism 6J includes a reference member 20J attached to the fitting hole 10J, and an attachment. It has an annular engagement member 25J mounted in the hole 15J.

  That is, the reference member 20 </ b> J is formed on the pallet 3 with an engagement convex portion 21 formed with a tapered engagement surface 22 having a smaller diameter on the lower side and a diameter smaller than the engagement convex portion 21 on the upper side of the engagement convex portion 21. A fitting tube portion 23 to be fitted into the formed fitting hole 10J, a proximal end abutting surface 24 which is formed at the upper end of the engaging convex portion 21 and abuts against the abutting surface 5, and has an annular engaging member 25J. Is mounted in a mounting hole 15J formed in the base member 2 and has a taper contact surface 26 that can be engaged with the taper engagement surface 22 in close contact.

(2) Although not shown, in the positioning mechanism 6, one of the pair of reference members 20 is slightly movable only in the direction of the center line that connects the axes of the pair of reference members 20. Alternatively, the pallet 3 () is mounted on the pallet 3), or one of the pair of annular engaging members 25 is slightly movable only in the direction of the center line connecting the axes of the pair of annular engaging members 25. Or it is mounted on the base member 2).

  Even when there is an error in the distance between the axes of the pair of reference members 20 and the distance between the axes of the pair of annular engagement members 25, the pair of annular engagement members 25 engage with the pair of reference members 20. In doing so, one reference member 20 or the annular engagement member 25 is automatically moved in a direction parallel to the center line and then fixed, so that the positional displacement (pitch) of the annular engagement member 25 with respect to the reference member 20 is fixed. Tolerance). Therefore, the positioning accuracy in the horizontal direction of the pallet 3 is maintained high without setting the distance between the axes of the pair of reference members 20 or the pair of annular engagement members 25 with high accuracy.

  The object positioning and fixing device according to the present invention can be applied to various devices that position and fix a target object on a base member in the technical field such as a work pallet, a vise device, and a chuck device.

1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1I Positioning and fixing device 2 Base member 3 Pallet 4 Reference seating surface 5 Contact surface 6, 6J Positioning mechanism 7, 7A, 7B, 7C, 7D, 7E, 7F, 7G, 7H, 7I Fixing mechanism 10, 10J Fitting holes 11, 11H, 11I, 11J First rod insertion hole 15, 15J Mounting hole 16, 16J Second rod insertion hole 16a Head receiving hole 20, 20J Reference member 21 Engaging convex portion 22 Taper engaging surface 23 Fitting cylinder portion 24 Base end abutting surface 25, 25J Annular engaging member 26 Taper abutting surface 30, 30I Pull rod member 30a Head portions 31, 31B, 31C, 31D , 31D, 31G, 31H, 31I Cylinder members 32, 32A, 32B, 32D, 32E, 32F, 32G Output members 33, 33G Ball lock mechanisms 34, 34B, 34F 34G First drive mechanism 35, 35F Second drive mechanism 50, 50G Compression spring 60 Extrusion mechanism 65 Gas spring 66 Gas working chamber 80, 85 Fluid passage 81, 86 First fluid passage portion 82 Second fluid passage portion 87 Third fluid Passage portion 88 Fourth fluid passage portion 92 Boosting mechanism

Claims (11)

In an object positioning and fixing device for positioning and fixing a target object in a horizontal direction and a vertical direction on a base member,
The base member includes a reference seat surface for positioning in the vertical direction, and the target object includes a contact surface capable of contacting the reference seat surface,
A plurality of positioning mechanisms disposed at positions separated from each other so that the target object can be positioned in the horizontal direction;
A plurality of fixing mechanisms attached to the plurality of positioning mechanisms, respectively, and capable of pressing and fixing the target object against a base member;
Each positioning mechanism is
A reference member that is mounted on one of the base member and the target object, and has an engagement convex portion formed with a taper engagement surface that decreases in diameter toward the distal end side, and is engaged with the proximal end side of the engagement convex portion. A fitting cylindrical portion that is formed to have a smaller diameter than a convex portion and is fitted into a fitting hole formed in one of the base member and the target object; and the reference seating surface that is formed at a base end of the engaging convex portion; A reference member having a proximal contact surface that contacts one of the contact surfaces;
An annular engagement member that is mounted in a mounting hole formed in the other of the base member and the target object and has a taper contact surface that can be engaged in close contact with the taper engagement surface;
Each of the fixing mechanisms is
A pull rod member that protrudes from the target object to the base member side and is fitted so as to be able to transmit a driving force to the target object so as to pass through a first rod insertion hole formed in the reference member and the base member;
A cylinder member attached to the base member;
An output member that is attached to the cylinder member so as to be capable of moving forward and backward, and into which the pull rod member is inserted;
A ball lock mechanism provided on the pull rod member, the cylinder member, and the output member, and releasably connecting the pull rod member and the output member by advancing and retracting the output member;
An object positioning / fixing device comprising: a first drive unit that couples a pull rod member and an output member via the ball lock mechanism and drives the output member so as to attract the target object to a base member.   The object according to claim 1, wherein the pull rod member is mounted so as to pass through a second rod insertion hole formed in the target object, and is configured to be detachable from the base member and the target object. Positioning and fixing device. A head having a larger diameter than the second rod insertion hole is provided at the upper end of the pull rod member,
The object positioning / fixing device according to claim 2, wherein a head receiving hole for receiving the head is formed in an upper part of the second rod insertion hole.   4. The apparatus according to claim 1, further comprising a second driving unit that drives the output member so as to release the coupling between the pull rod member and the output member that are coupled via the ball lock mechanism. The object positioning and fixing device as described.   2. An extrusion mechanism that pushes the pull rod member upward when driving the output member so as to release the coupling between the pull rod member and the output member coupled via the ball lock mechanism. The object positioning fixing device according to any one of to 4.   5. The object positioning / fixing device according to claim 1, wherein the first driving unit includes a compression spring accommodated in the cylinder member. 6.   The first drive means comprises a gas spring having a gas working chamber formed in the cylinder member by a cylinder member and an output member and filled with compressed gas. The object positioning fixing device according to item.   5. The fluid passage according to claim 1, further comprising a fluid passage having a first fluid passage portion formed in a pull rod member for supplying fluid pressure to a fluid pressure device mounted on the target object. The object positioning fixing device according to item.   The object positioning / fixing device according to claim 8, wherein the fluid passage has a second fluid passage portion formed in the output member so as to communicate with the first fluid passage portion.   9. The object positioning / fixing device according to claim 8, wherein the first fluid passage portion is configured to communicate with third and fourth fluid passage portions formed in the base member and a target object, respectively. .   The ball lock mechanism includes a force-increasing mechanism that increases the driving force of the output member and transmits the force to the pull rod member when the target object is attracted to the base member. Object positioning and fixing device.