JP2020069556A - Positioning/fixing device - Google Patents

Abstract

To position and fix an object to be fixed while suppressing increase in total thickness of whole of a jig including a base body and the object to be fixed.SOLUTION: A cylinder main body includes a part to be embedded in a base body, a cylindrical shaft part protruding from the base body, and a flange part which is provided at an opposite side of the cylindrical shaft part with respect to the base body and can be fixed to the base body. In an outer periphery part of the cylindrical shaft part is formed a taper surface which reduces in a diameter toward a tip side in a shaft center direction of the cylindrical shaft part. An annular member to be attached to an object to be fixed includes an engagement part which is provided in an inner periphery side part and which can perform positioning in a horizontal direction of the object to be fixed by engaging with the taper surface. The annular member can be driven so that the object to be fixed contacts a reference surface of the base body.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a positioning and fixing device.

  A fixing device for fixing an object to be fixed (a work pallet for attaching a workpiece to be machined, a mold, etc.) on a base body, which has a function of positioning the object to be fixed, has been conventionally known. . Examples of positioning and fixing devices that perform fixing and positioning include those described in Patent Documents 1 and 2.

  However, in the devices described in Patent Document 1 and Patent Document 2, it is necessary to manually insert the rod or the bolt in a state where the fixing target object is superposed on the base body, which increases the time and effort for exchanging the fixing target object. Examples of the positioning and fixing device capable of saving the labor of exchanging the fixing target include those described in Patent Documents 3 to 5.

JP, 2013-223888, A JP, 2014-39972, A International Application Publication No. 2005/110671 JP, 2003-19631, A JP, 2008-183651, A

  In the positioning and fixing device described in Patent Document 3 to Patent Document 5, the cylinder body is provided with an upper flange located on the upper surface of the base body (main surface on the side of the fixing target), and the upper flange portion is fixed to the base body. is doing. Therefore, in the state where the fixing target portion is fixed on the base body, as a whole jig including the base body and the fixing target object, in addition to the thickness of the base body and the fixing target object, the upper flange portion of the positioning fixing device is It will have an added thickness.

  For example, there are cases where the entire jig is rotated for the convenience of machining such as cutting with the object to be fixed fixed on the base body. If the thickness of the entire jig is large, the moment of inertia becomes large, which may increase the load on the equipment supporting the base body.

  A positioning and fixing device capable of positioning and fixing an object to be fixed to the base body while saving labor for exchanging the object to be fixed and suppressing an increase in the thickness of the entire jig including the base body and the object to be fixed. Is preferred.

  The positioning and fixing device according to the present disclosure is capable of attracting and fixing an object to be fixed to the base body and positioning the object to be fixed with respect to the base body.

  The positioning and fixing device includes a fluid pressure cylinder fixed to the base body, and an annular member attachable to a mounting hole formed in the fixing target.

  The fluid pressure cylinder includes a cylinder body, a piston member that can reciprocate with respect to the cylinder body, and a drive mechanism that drives the annular member in the reciprocating direction as the piston member reciprocates.

  In one aspect, the cylinder body is provided in a portion embedded in the base body, a tubular shaft portion protruding from the base body, and provided on the opposite side of the tubular shaft portion with respect to the base body, and can be fixed to the base body. And a large flange portion. A tapered surface is formed on the outer peripheral portion of the tubular shaft portion, the taper surface having a smaller diameter toward the tip end side in the axial direction of the tubular shaft portion. The annular member includes an engaging portion provided on an inner peripheral side portion of the annular member, and an engaging portion capable of positioning the fixing target in the horizontal direction by engaging with the tapered surface. The drive mechanism can drive the annular member so that the fixed object contacts the reference surface of the base body.

  In one embodiment, the base body may abut the fixing target in the region around the portion where the cylinder body is embedded.

  In one embodiment, the base body can abut the fixed object in the region of the outer edge portion of the fixed object.

  In one aspect, the cylinder body includes a portion embedded in the base body and a tubular shaft portion protruding from the base body. A tapered surface is formed on the outer peripheral portion of the tubular shaft portion, the taper surface having a smaller diameter toward the tip end side in the axial direction of the tubular shaft portion. The annular member includes an engaging portion provided on an inner peripheral side portion of the annular member, and an engaging portion capable of positioning the fixing target in the horizontal direction by engaging with the tapered surface. The cylindrical shaft portion of the cylinder body is adjacent to the portion embedded in the base body, and the cylindrical shaft portion is formed to have a smaller diameter than that of the embedded portion, so that the fixed object can contact the reference surface of the base body. is there.

  In one embodiment, a stepped portion may be formed between the tubular shaft portion and a portion embedded in the base body, and the stepped portion may be formed below a reference surface of the base body.

  In one aspect, the cylinder body includes a portion embedded in the base body and a tubular shaft portion protruding from the base body. A tapered surface is formed on the outer peripheral portion of the tubular shaft portion, the taper surface having a smaller diameter toward the tip end side in the axial direction of the tubular shaft portion. The annular member includes an engaging portion provided on an inner peripheral side portion of the annular member, and an engaging portion capable of positioning the fixing target in the horizontal direction by engaging with the tapered surface. The tapered surface of the cylindrical shaft portion is formed in the vicinity of the reference surface of the base body, and the fixing target can contact the reference surface of the base body.

  In one embodiment, the hydraulic cylinder may include a fluid chamber formed in the cylinder body and supplied with fluid for driving the piston member. The fluid chamber may be formed so as to be accommodated in a portion embedded in the base body of the cylinder body.

  In one embodiment, the drive mechanism may include a plurality of steel balls that are respectively movably held in a radial direction in a plurality of holding holes formed in the tubular shaft portion. The annular member may include a plurality of engaging recesses formed by a plurality of steel balls capable of surface contact or line contact with the annular member fitted onto the tubular shaft portion. The piston member is driven in a direction away from the fixing target, and the fixing target is fixed to the base body by engaging the plurality of steel balls with the plurality of engaging recesses, respectively, and the piston member is approached to the fixing target. The fixing target object can be released from the base body by driving in the direction to disengage the steel balls from the engagement recesses.

In one embodiment, the engagement recess may be formed in a partially spherical surface or a partially cylindrical surface.
In one embodiment, the annular member is fixed to a first annular member including an engaging portion that engages with the tapered surface and an engaging recess that engages with the steel ball, and the inner peripheral surface of the attachment hole of the fixing target. And a second annular member that is opened. The first ring-shaped member presses the second ring-shaped member toward the base body to fix the fixing target to the base body.

  In one embodiment, the fixed object can be released from the base body by driving the piston member toward the fixed object and pressing the bottom surface of the mounting hole of the fixed object with the tip of the piston member.

  ADVANTAGE OF THE INVENTION According to the positioning and fixing device which concerns on this indication, while exchanging labor of a fixed object, and suppressing the increase in the thickness of the whole jig which combined the base object and a fixed object, it fixes to a base object. Items can be positioned and fixed.

It is a top view of a base body provided with a positioning and fixing device according to one embodiment. It is sectional drawing which shows the unclamping state (1st state) of the positioning and fixing apparatus which concerns on one embodiment. It is sectional drawing which shows the clamped state (2nd state) of the positioning and fixing apparatus which concerns on one embodiment. It is sectional drawing which shows the clamped state of the positioning and fixing apparatus which concerns on other embodiment. It is sectional drawing which shows the cylindrical shaft part in the cylinder main body of the positioning and fixing device shown in FIG. It is sectional drawing which shows the clamped state of the positioning and fixing apparatus which concerns on other embodiment. It is a top view which shows the 1st member in the annular member of the positioning and fixing apparatus shown in FIG. It is sectional drawing which shows the clamped state of the positioning and fixing apparatus which concerns on other embodiment. It is a top view of a base body provided with a positioning and fixing device according to one embodiment, and is a diagram showing an example of an arrangement of reference seating surfaces in the base body. FIG. 10 is a cross-sectional view corresponding to FIG. 9 (a state in which an object to be fixed is placed). It is a top view of a base body provided with a positioning and fixing device according to one embodiment, and is a view showing another example of the arrangement of reference seating surfaces in the base body. FIG. 12 is a cross-sectional view (a state in which a fixed object is placed) corresponding to FIG. 11.

  Embodiments will be described below. In addition, the same or corresponding portions may be denoted by the same reference symbols, and the description thereof may not be repeated.

  In the embodiments described below, when referring to the number, amount, etc., the scope of the present invention is not necessarily limited to the number, amount, etc., unless otherwise specified. Further, in the following embodiments, each component is not necessarily essential to the present invention unless otherwise specified.

  FIG. 1 is a top view of a base body provided with a positioning and fixing device according to this embodiment. As shown in FIG. 1, positioning fixing devices 1000 and 2000 and fixing device 3000 are arranged on base body 2.

  The positioning and fixing device 1000 can restrain the fixing target in the X-axis direction, the Y-axis direction, and the Z-axis direction in FIG. The positioning and fixing device 2000 can restrain the fixing target in the arrow A direction and the Z axis direction in FIG. Arrow A is an arrow in a direction orthogonal to a line connecting the center of the positioning and fixing apparatus 1000 and the center of the positioning and fixing apparatus 2000. The fixing device 3000 can restrain the fixing target in the Z-axis direction in FIG. 1.

  In the example shown in FIG. 1, when the fixation target is fixed, the positioning fixation device 1000 and the positioning fixation device 2000 perform positioning of the fixation target in the XY plane direction. At the same time, the positioning and fixing device 1000, the positioning and fixing device 2000, and the two fixing devices 3000 position the fixing target in the Z-axis direction.

  The arrangement of the positioning and fixing device is not limited to the example shown in FIG. 1, and for example, the positioning and fixing device 1000 and the positioning and fixing device 2000 may be provided one by one.

  The structure and operation of the positioning and fixing device 1000 will be described with reference to FIGS. 2 and 3. 2 shows an unclamped state of the positioning and fixing apparatus 1000, and FIG. 3 is a sectional view showing a clamped state of the positioning and fixing apparatus 1000.

  As shown in FIGS. 2 and 3, the positioning and fixing device 1000 attracts and fixes the fixing object 1 to the reference seat surface 2C (reference surface) of the base body 2. At this time, the fixed object 1 can be positioned with respect to the base body 2.

  Examples of the fixed object 1 include, for example, a work pallet to which a work to be subjected to cutting work is attached, a mold, and the like, but the fixed object 1 in the present disclosure is not limited thereto. A mounting hole 1 </ b> A is provided on the main surface of the fixed object 1 facing the base body 2.

  The base body 2 may be fixed to a stationary object or may be supported by a rotation support mechanism or the like to be in a movable state. The base body 2 is formed with oil passages 2A and 2B for supplying an operating hydraulic pressure to the positioning and fixing device 1000.

  The positioning and fixing device 1000 includes a fluid pressure cylinder 100 fixed to the base body 2 and an annular member 200 attachable to the attachment hole 1A of the fixing target 1. Hereinafter, the fluid pressure cylinder 100 that is a hydraulic cylinder will be exemplified, but the fluid pressure cylinder 100 may be an air cylinder.

  The fluid pressure cylinder 100 includes a cylinder body 110, a piston member 120, and a steel ball 130. The fluid pressure cylinder 100 is fixed to the base body 2 by a bolt 140 (fixing member). The fluid pressure cylinder 100 includes an oil chamber 150 for clamping (first fluid chamber), an oil chamber 160 for unclamping (second fluid chamber), and a rotation preventing mechanism for preventing rotation of the piston member 120 around the axial direction. 170 and.

  The cylinder body 110 includes a first member 111 and a second member 112. The first member 111 includes a cap portion 111A (first portion) for forming the oil chamber 160, and a flange portion 111B (second portion) fixed to the base body 2 by the bolt 140. The second member 112 includes an embedded portion 112A (cylinder body) embedded in the base body, a cylindrical shaft portion 112B (projection portion) protruding from the base body 2, and a cylindrical shaft portion 112B with respect to the base body 2. And a flange portion 112C provided on the opposite side of.

  The tubular shaft portion 112B has a smaller diameter than the embedded portion 112A. The tubular shaft portion 112B is adjacent to the embedded portion 112A. The flange portion 112C is formed so as to project outward in the radial direction from the embedded portion 112A. The flange portion 112C is adjacent to the embedded portion 112A on the side opposite to the tubular shaft portion 112B. The flange portion 112C is fixed to the base body 2 together with the flange portion 111B of the first member 111.

  The second member 112 can connect the oil passage 112D capable of connecting the oil passage 2A of the base body 2 and the oil chamber 150 for clamping, and the oil passage 2B of the base body 2 and the oil chamber 160 for unclamping. And an oil passage 112E.

  In the second member 112 of the cylinder body 110, a step portion 112F is formed between an embedded portion 112A (cylinder body portion) embedded in the base body 2 and a cylindrical shaft portion 112B protruding from the base body 2. As shown in the examples of FIGS. 2 and 3, in the state in which the positioning and fixing device 1000 is provided on the base body 2, the step portion 112F of the cylinder body 110 is closer to the base body 2 than the reference seat surface 2C of the base body 2. It is located inwardly, that is, below the reference seat surface 2C. Therefore, the base body 2 is provided with the reference seat surface 2C.

  A taper surface 112G is formed on the outer peripheral portion of the tubular shaft portion 112B, the taper surface 112G having a smaller diameter toward the axially distal end side of the tubular shaft portion 112B. In the example of FIGS. 2 and 3, the tapered surface 112G is continuously formed over the entire circumference of the tubular shaft portion 112B. The tapered surface 112G may be intermittently formed in the circumferential direction of the tubular shaft portion 112B. The taper surface 112G projects above the reference seat surface 2C. The tapered surface 112G is arranged adjacent to the reference seat surface 2C. The tapered surface 112G is formed near the reference seat surface 2C.

  A seal member 113 is provided at the joint between the first member 111 and the second member 112 of the cylinder body 110. Sealing members 114, 115, and 116 are provided on the outer peripheral portion of the second member 112 of the cylinder body 110. The seal member 114 seals between the oil passages 2B and 112E and the outside of the base body 2. The seal member 115 seals between the oil passages 2A and 112D and the oil passages 2B and 112E. The seal member 116 seals between the oil passages 2A and 112D and the outside of the base body 2.

  The piston member 120 is fitted in the cylinder body 110 so as to be able to move forward and backward in the axial direction. The piston member 120 is slidably supported by a piston portion 120A slidably supported by an embedded portion 112A of the second member 112 and a cylindrical shaft portion 112B of the second member 112 that extends upward from the piston portion 120A. The piston shaft portion 120B is included.

  The piston portion 120A partitions the oil chamber 150 and the oil chamber 160. A seal member 123 is provided on the outer peripheral portion of the piston portion 120A. The seal member 123 seals between the oil chambers 150 and 160. Sealing members 124 and 125 are provided on the outer peripheral portion of the piston shaft portion 120B. The seal members 124 and 125 seal between the oil chamber 150 and the outside of the cylinder body 110.

  A relief recess 121 capable of holding the steel ball 130 is formed on the outer peripheral portion of the piston shaft portion 120B. A piston top surface 122 is formed at the upper end of the piston shaft portion 120B. In the unclamped state shown in FIG. 2, the piston top surface 122 is in contact with the bottom surface of the mounting hole 1A of the fixed object 1 to support the fixed object 1.

  The steel ball 130 is supported by the tubular shaft portion 112B of the cylinder body 110. In the unclamped state shown in FIG. 2, the steel ball 130 is held in the escape recess 121 of the piston shaft 120B. In the clamped state shown in FIG. 3, the steel ball 130 is disengaged from the escape recess 121 and is pressed radially outward by the tapered surface 121A formed on the outer periphery of the piston shaft 120B. The tapered surface 121A is formed so as to be continuous with the escape recess 121. 121 A of taper surfaces incline in the direction which goes to the radial direction outer side of piston shaft part 120B as it goes to the front end side of piston shaft part 120B. A plurality of (for example, four) steel balls 130 are provided at equal intervals in the circumferential direction.

  The bolt 140 is inserted into the flange portion 111B of the first member 111 and the flange portion 112C of the second member 112 to fix the first member 111 and the second member 112 to the base body 2. As a result, the cylinder body 110 is fixed to the base body 2.

  The oil chamber 150 communicates with the oil passage 2A via the oil passage 112D. The oil chamber 150 is supplied with hydraulic pressure for the clamping operation of the piston member 120. An elastic member 151 (biasing member) is provided in the oil chamber 150. The elastic member 151 biases the piston portion 120A toward the first member 111 side. The urging force of the elastic member 151 stably holds the piston member 120 in the clamped state. The oil chamber 150 is formed so as to fit in the embedded portion 112A of the cylinder body 110.

  The oil chamber 160 communicates with the oil passage 2B via the oil passage 112E. The oil chamber 160 is formed so as to fit in the embedded portion 112A of the cylinder body 110. Oil pressure for unclamping the piston member 120 is supplied to the oil chamber 160. The piston member 120 is driven in the axial direction by the pressure difference between the oil chambers 150 and 160 and the biasing force of the elastic member 151.

  The rotation prevention mechanism 170 includes a rod-shaped member 171 and a hole 172. The rod-shaped member 171 is inserted or press-fitted and fixed in a hole formed in the cap portion 111A of the cylinder body 110. The hole 172 is formed on the lower surface of the piston member 120. The hole 172 receives the rod-shaped member 171. The rod-shaped member 171 and the hole 172 have a polygonal (eg, hexagonal) cross-sectional shape. By inserting the rod-shaped member 171 into the hole 172, rotation of the piston member 120 in the cylinder body 110 is prevented, and the steel ball 130 is held at an accurate position.

  The annular member 200 includes a first member 210 and a second member 220. The first member 210 includes an engaging portion 210A that is engageable with the tapered surface 112G of the second member 112 of the cylinder body 110.

  A tapered surface 210B is formed on the inner circumference of the engaging portion 210A. The tapered surface 210B inclines in the direction in which the inner circumference of the first member 210 expands toward the base side (the stepped portion 112F side) of the tubular shaft portion 112B. In the clamped state shown in FIG. 3, the tapered surface 210B of the annular member 200 engages with the tapered surface 112G of the cylinder body 110. At this time, the engaging portion 210A is elastically deformable.

  An engaging recess 210C is formed in a portion of the first member 210 facing the steel ball 130. The engagement recess 210C is formed such that the inner circumference of the first member 210 expands toward the upper side (the tip side of the tubular shaft 112B). The engagement recess 210C is formed so that the steel ball 130 can make surface contact or line contact. The engaging recess 210C is formed in a partially spherical shape or a partially cylindrical surface shape.

  The second member 220 is screwed into the inner periphery of the mounting hole 1A of the fixing target 1, and the first member 210 is fixed to the fixing target 1 together with the second member 220.

  Next, the clamp operation of the positioning and fixing device 1000 will be described. From the unclamped state shown in FIG. 2, hydraulic pressure is supplied to the oil chamber 150 via the oil passages 2A and 112D. As a result, the piston member 120 is driven downward (to the first member 111 side of the cylinder body 110). When the piston member 120 is driven downward, the steel ball 130 held in the escape recess 121 in the state of FIG. 2 is pressed by the tapered surface 121A toward the radially outer side of the piston shaft portion 120B. As shown in FIG. 3, the steel ball 130 pressed outward in the radial direction engages with the engaging recess 210C of the annular member 200 and drives the first member 210 and the second member 220 of the annular member 200 downward. ..

  As a result, the fixed object 1 is pushed down. That is, the fixing target 1 is fixed to the base body 2 by driving the piston member 120 in a direction away from the fixing target 1 and engaging the plurality of steel balls 130 with the plurality of engaging recesses 210C, respectively.

  The fixed object 1 is pushed down until it comes into contact with the reference seat surface 2C of the base body 2. Positioning of the fixed object 1 in the vertical direction (Z-axis direction) is realized by the reference seat surface 2C.

  When the annular member 200 is driven downward, the tapered surface 210B of the engaging portion 210A engages with the tapered surface 112G of the tubular shaft portion 112B. Therefore, the annular member 200 descends while being guided by the tapered surface 112G. Positioning of the fixed object 1 in the horizontal direction (X-axis direction and Y-axis direction) is realized by the tapered surface 112G.

  The unclamping operation of the positioning and fixing device 1000 can be performed by the following procedure. From the clamped state shown in FIG. 3, hydraulic pressure is supplied to the oil chamber 160 via the oil passages 2B and 112E. As a result, the piston member 120 is driven upward (to the piston shaft portion 120B side).

  When the piston member 120 is driven upward, the piston top surface 122 contacts the fixed object 1 and presses the fixed object 1 upward. As a result, the engagement between the steel ball 130 and the engagement recess 210C is released. Further, the engagement between the tapered surface 112G of the cylinder body 110 and the tapered surface 210B of the annular member 200 is released.

  As a result, the fixing target 1 is pushed up to the unclamping state shown in FIG. That is, the piston member 120 is driven in a direction approaching the fixing target 1, and the plurality of steel balls 130 are disengaged from the plurality of engaging recesses 210C, respectively, thereby releasing the fixing of the fixing target 1 from the base body 2. ..

  In the positioning and fixing device 1000, the annular member 200 can be driven so that the fixed object 1 comes into contact with the reference seat surface 2C of the base body 2, and the reference seat surface 2C of the base body 2 vertically moves the fixed object 1. Is being positioned. Therefore, in the clamped state shown in FIG. 3, as compared with the structure in which the reference seating surface is provided on the cylinder body protruding from the base body 2, the thickness of the entire jig including the fixing target 1 and the base body 2 is reduced. It is possible to suppress an increase in the moment of inertia. Therefore, in the case where the jig is rotated as a whole for convenience of machining such as cutting with the fixing object 1 fixed on the base body 2, it is possible to reduce the load on the equipment that supports the base body 2. Is possible.

  Next, the positioning and fixing device 2000 will be described with reference to FIGS. 4 and 5. The positioning and fixing device 2000 includes the same fluid pressure cylinder 100 and annular member 200 as the positioning and fixing device 1000, but differs in the following points.

  In the positioning and fixing device 2000 shown in FIGS. 4 and 5, a tapered surface 112G and a vertical surface 112H are formed on the outer periphery of the cylindrical shaft portion 112B of the cylinder body 110. The tapered surface 112G is formed only in two areas facing each other in the direction of arrow A, and the vertical surface 112H is formed in the other areas. Vertical surface 112H does not engage tapered surface 210B of annular member 200.

  According to the positioning and fixing device 2000 illustrated in FIG. 4 and FIG. 5, it is possible to provide restraint (positioning) only in the arrow A direction on the XY plane.

  A modified example of the positioning and fixing device 2000 will be described with reference to FIGS. 6 and 7. The example shown in FIGS. 6 and 7 is different from the positioning and fixing device 1000 in that the first member 210 of the annular member 200 is divided into a first portion 211 and a second portion 212.

  The first portion 211 and the second portion 212 are formed as two separate members. In two areas facing each other in the direction of arrow A, the outer peripheral surface 211A of the first portion 211 and the inner peripheral surface 212A of the second portion 212 abut, and in the other areas, the outer peripheral surface 211B of the first portion 211 and the outer peripheral surface 211B. A gap is formed between the inner peripheral surface 212B of the second portion 212. The outer peripheral surface 211B of the first portion 211 and the inner peripheral surface 212B of the second portion 212 do not come into contact with each other.

  The positioning and fixing device 2000 illustrated in FIGS. 6 and 7 can also provide the restraint (positioning) only in the arrow A direction on the XY plane.

  By setting the direction of the arrow A as shown in FIG. 1, it is possible to suppress the rotation of the fixed object 1 in the θ direction (see FIG. 1).

  FIG. 8 is a diagram showing a modification of the positioning and fixing device 1000. As shown in FIG. 8, the tapered surface 112G may be formed by an outer insertion member 112B1 provided on the outer periphery of the cylindrical shaft portion 112B as a member separate from the cylinder body 110.

  Next, an example of the arrangement of the reference seat surface 2C of the base body 2 will be described with reference to FIGS. 9 to 12.

  In the example shown in FIGS. 9 and 10, the reference seating surface 2C is formed in the region around the portion where the cylinder bodies of the positioning and fixing devices 1000 and 2000 and the fixing device 3000 are embedded. The reference seat surface 2C is formed so as to surround the portions of the positioning and fixing devices 1000 and 2000 and the fixing device 3000 in which the cylinder body is embedded. In the example shown in FIGS. 9 and 10, the tapered surface 112G (cylinder body 110) for positioning in the XY plane direction and the reference seat surface 2C for positioning in the Z-axis direction are formed at relatively close positions.

  In the example shown in FIGS. 11 and 12, the reference seat surface 2C is formed in the region of the outer edge portion of the fixed object 1.

  A portion of the base body 2 where the reference seat surface 2C is not formed is a flank surface 2D so as not to come into contact with the fixed object 1.

  The arrangement of the reference seat surface 2C shown in FIGS. 9 and 10 may be combined with the arrangement of the reference seat surface 2C shown in FIGS. 11 and 12. Further, by providing the seal portion around the reference seating surface 2C, it is possible to prevent chips generated during cutting or the like from entering the reference seating surface 2C.

  In the examples of FIGS. 9 to 12, the reference seat surface 2C and the flank surface 2D are provided on the side of the base body 2, but the base body 2 is formed flat and abutted against the base body 2 on the side of the fixed object 1. Processing may be performed to provide a contact surface that contacts and a non-contact surface that does not contact the base body 2.

  Although the embodiments of the present invention have been described above, it should be considered that the embodiments disclosed this time are exemplifications in all points and not restrictive. The scope of the present invention is shown by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

  1 fixed object, 1A mounting hole, 2 base body, 2A oil passage (for clamp), 2B oil passage (for unclamp), 2C reference seat surface (reference surface), 2D flank surface, 100 hydraulic cylinder (fluid pressure cylinder) ), 110 cylinder body, 111 first member, 111A cap portion (first portion), 111B flange portion (second portion), 112 second member, 112A embedded portion (cylinder body portion), 112B tubular shaft portion (projection) Part), 112C flange portion, 112D oil passage (for clamp), 112E oil passage (for unclamp), 112F step portion, 112G taper surface (guide surface), 112H vertical surface (flank surface), 113, 114, 115, 116 seal member, 120 piston member, 120A piston part, 120B piston shaft part, 121 escape recess, 121A taper Surface, 122 piston top surface, 123, 124, 125 seal member, 130 steel ball, 140 bolt, 150 oil chamber (first fluid chamber), 151 elastic member, 160 oil chamber (second fluid chamber), 170 rotation prevention mechanism , 171 bar-shaped member, 172 hole part, 200 annular member, 210 first member, 210A engaging part, 210B tapered surface (engaging surface), 210C engaging recess, 220 second member, 211 first part, 211A, 211B Outer peripheral surface, 212 Second part, 212A, 212B Inner peripheral surface, 1000, 2000 Positioning fixing device, 3000 fixing device.

Claims (11)

A positioning and fixing device capable of attracting and fixing a fixed object to a base body and positioning the fixed object with respect to the base body,
A fluid pressure cylinder fixed to the base body;
An annular member attachable to an attachment hole formed in the fixed object,
The fluid pressure cylinder includes a cylinder body, a piston member that can reciprocate with respect to the cylinder body, and a drive mechanism that drives the annular member in the reciprocating direction as the piston member reciprocates. ,
The cylinder body is provided on a portion embedded in the base body, a cylindrical shaft portion protruding from the base body, and on the opposite side of the cylindrical shaft portion with respect to the base body, and fixed to the base body. A possible flange portion, the outer peripheral portion of the cylindrical shaft portion is formed with a tapered surface having a smaller diameter toward the tip side in the axial direction of the cylindrical shaft portion,
The annular member is an engaging portion provided on an inner peripheral side portion of the annular member, and is capable of performing horizontal positioning of the fixed object by engaging with the tapered surface. Including parts,
The positioning mechanism is capable of driving the annular member such that the fixing object contacts the reference surface of the base body.   The positioning and fixing device according to claim 1, wherein the base body contacts the fixing target in a region around a portion where the cylinder body is embedded.   The positioning and fixing device according to claim 1 or 2, wherein the base body is in contact with the fixing target object in a region of an outer edge portion of the fixing target object. A positioning and fixing device capable of attracting and fixing a fixed object to a base body and positioning the fixed object with respect to the base body,
A fluid pressure cylinder fixed to the base body;
An annular member attachable to an attachment hole formed in the fixed object,
The fluid pressure cylinder includes a cylinder body, a piston member that can reciprocate with respect to the cylinder body, and a drive mechanism that drives the annular member in the reciprocating direction as the piston member reciprocates. ,
The cylinder main body includes a portion embedded in the base body and a tubular shaft portion protruding from the base body, and an outer peripheral portion of the tubular shaft portion has a tip end side in the axial direction of the tubular shaft portion. A tapered surface with a smaller diameter is formed toward
The annular member is an engaging portion provided on an inner peripheral side portion of the annular member, and is capable of performing horizontal positioning of the fixed object by engaging with the tapered surface. Including parts,
The tubular shaft portion of the cylinder body is adjacent to a portion embedded in the base body, the tubular shaft portion is formed to have a smaller diameter than the embedded portion, and the fixing target is the base body. Positioning and fixing device that can contact the reference surface.   The positioning fixing according to claim 4, wherein a step portion is formed between the cylindrical shaft portion and a portion embedded in the base body, and the step portion is formed below a reference surface of the base body. apparatus. A positioning and fixing device capable of attracting and fixing a fixed object to a base body and positioning the fixed object with respect to the base body,
A fluid pressure cylinder fixed to the base body;
An annular member attachable to an attachment hole formed in the fixed object,
The fluid pressure cylinder includes a cylinder body, a piston member that can reciprocate with respect to the cylinder body, and a drive mechanism that drives the annular member in the reciprocating direction as the piston member reciprocates. ,
The cylinder main body includes a portion embedded in the base body and a tubular shaft portion protruding from the base body, and an outer peripheral portion of the tubular shaft portion has a tip end side in the axial direction of the tubular shaft portion. A tapered surface with a smaller diameter is formed toward
The annular member is an engaging portion provided on an inner peripheral side portion of the annular member, and is capable of performing horizontal positioning of the fixed object by engaging with the tapered surface. Including parts,
The positioning and fixing device, wherein the tapered surface of the tubular shaft portion is formed in the vicinity of the reference surface of the base body, and the fixing target can contact the reference surface of the base body. The fluid pressure cylinder includes a fluid chamber formed in the cylinder body, to which a fluid for driving the piston member is supplied.
The positioning and fixing device according to any one of claims 1 to 6, wherein the fluid chamber is formed so as to be accommodated in a portion of the cylinder body embedded in the base body. The drive mechanism includes a plurality of steel balls held respectively in a plurality of holding holes formed in the tubular shaft portion so as to be movable in the radial direction,
The annular member includes a plurality of engagement recesses each of which is formed such that the plurality of steel balls are in surface contact or line contact with each other while the annular member is externally fitted to the tubular shaft portion,
The piston member is driven in a direction away from the fixed object, and the fixed object is fixed to the base body by respectively engaging the plurality of steel balls with the plurality of engaging recesses,
Driving the piston member in a direction approaching the fixing target, and disengaging the plurality of steel balls from the plurality of engaging recesses to release the fixing target from the base body. The positioning and fixing device according to any one of claims 1 to 7.   The positioning and fixing device according to claim 8, wherein the engagement recess is formed in a partially spherical shape or a partially cylindrical surface shape. The annular member is fixed to a first annular member including the engaging portion that engages with the tapered surface and the engaging recess that engages with the steel ball, and the inner peripheral surface of the attachment hole of the fixing target. A second annular member,
The positioning and fixing device according to claim 8 or 9, wherein the first annular member fixes the object to be fixed to the base body by pressing the second annular member toward the base body side.   Driving the piston member in a direction approaching the fixed object, and pressing the bottom surface of the mounting hole of the fixed object with the tip of the piston member to release the fixation of the fixed object from the base body. The positioning and fixing device according to any one of claims 1 to 10.

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