Positioning and fixing device

Abstract

The positioning and fixing device includes a first member fixed to the first mechanism and a second member fixed to the second mechanism. The first member includes a tapered convex portion having a first tapered surface, the diameter of which decreases toward the second mechanism side. The second member includes an annular portion having a second tapered surface capable of engaging with the first tapered surface. When the first mechanism and the second mechanism approach each other in the first direction and the first reference surface and the second reference surface are brought into contact with each other, the first conical surface and the second conical surface are brought into close contact with each other by the elastic deformation of the tapered protrusion toward the inner diameter side, thereby performing relative positioning of the first mechanism and the second mechanism in a plane direction orthogonal to the first direction. The reference portion of the first member protrudes further toward the outer diameter side than the tapered protruding portion in a direction orthogonal to the first direction. A slit portion is formed in the circumferential direction of the tapered convex portion to at least partially cut off the tapered convex portion.

Description

Technical Field

[0001] The present technology relates to a positioning and fixing device. Background Art

[0002] As a positioning and fixing device for positioning and fixing a fixing object (a workpiece pallet on which a workpiece to be machined is mounted, a mold, etc.) on a base, there can be cited positioning and fixing devices described in the following Patent Documents 1 to 6.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 5627664

[0006] Patent Document 2: Japanese Patent No. 5964640

[0007] Patent Document 3: Japanese Patent No. 5946706

[0008] Patent Document 4: Japanese Patent No. 5996306

[0009] Patent Document 5: German Patent Invention Specification No. 19826328

[0010] Patent Document 6: Japanese Utility Model Patent No. 3182101 Summary of the invention

[0011] Problem that the invention aims to solve

[0012] There is a demand for further miniaturization of positioning and fixing devices. For example, in the device described in Patent Document 1, space is required to fix the reference member with bolts. In the positioning and fixing devices described in Patent Documents 2 to 5, the reference member is fixed by pressing in, but there are manufacturing limitations when seeking further miniaturization. In the positioning and fixing device described in Patent Document 6, the deformation of the engaging portion is promoted by providing an elastic member, but there are cases where the elastic member hinders miniaturization. The purpose of the present technology is to provide a miniaturized positioning and fixing device.

[0013] Solutions for solving problems

[0014] The positioning and fixing device of the present technology is a positioning and fixing device that can perform relative positioning between a first mechanism and a second mechanism and fix the first mechanism and the second mechanism to each other.

[0015] The positioning and fixing device comprises: a first member fixed to a first mechanism; and a second member fixed to a second mechanism. The first mechanism comprises a first reference surface and a first fitting hole provided in a manner of opening on the first reference surface. The second mechanism comprises a second reference surface opposite to the first reference surface along a first direction, and a second fitting hole provided in a manner of opening on the second reference surface.

[0016] The first member includes: a cylindrical portion that is pressed into the first fitting hole; a tapered convex portion that protrudes from the first reference surface toward the second mechanism side along the first direction and has a first tapered surface whose diameter decreases as it moves toward the second mechanism side; and a reference portion that abuts against the first reference surface. The cylindrical portion, the tapered convex portion, and the reference portion are formed integrally.

[0017] The second member is press-fitted into the second fitting hole, and includes an annular portion having a second tapered surface that can engage with the first tapered surface.

[0018] When the first mechanism and the second mechanism are brought close to each other along the first direction and the first reference surface abuts against the second reference surface, the first conical surface and the second conical surface are brought into close contact with each other due to elastic deformation of the conical protrusion toward the inner diameter side, thereby performing relative positioning of the first mechanism and the second mechanism in a planar direction orthogonal to the first direction.

[0019] In one embodiment, in the above-mentioned positioning and fixing device, the reference portion of the first member protrudes toward the outer diameter side than the tapered convex portion along a direction orthogonal to the first direction.

[0020] In one embodiment, in the above-mentioned positioning and fixing device, a slit portion that at least partially cuts off the tapered convex portion is formed in the circumferential direction of the tapered convex portion.

[0021] In one embodiment, in the above-mentioned positioning and fixing device, the first tapered surface of the first member is formed to be separated from the first reference surface along the first direction.

[0022] In one embodiment, in the above-mentioned positioning and fixing device, an internal thread portion is formed on an inner periphery of the cylindrical portion of the first member.

[0023] In one embodiment, in the above-mentioned positioning and fixing device, an internal thread portion is formed on an inner periphery of the second member, and the internal thread portion is provided at a position different from the second tapered surface in the first direction.

[0024] Effects of the Invention

[0025] According to the present technology, a miniaturized positioning and fixing device can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a top view of the positioning fixture.

[0027] Figure 2 is a side sectional view of the positioning fixture ( Figure 1 II-II section view in the figure).

[0028] Figure 3 It is a top view of the base in the positioning fixture (showing from Figure 2 (a top view of the state when observing the substrate in the III-III direction).

[0029] Figure 4 yes Figure 2 An enlarged view of section IV in FIG.

[0030] Figure 5 yes Figure 4 VV section view in.

[0031] Figure 6 It is a diagram showing the press-fitting process of the reference member.

[0032] Figure 7 It is a figure which shows the press-fitting process of the annular engaging member.

[0033] Figure 8 It is a side sectional view of a positioning and fixing device of a modified example. DETAILED DESCRIPTION

[0034] The following describes an embodiment of the present technology. In addition, the same reference numerals are attached to the same or corresponding parts, and the description thereof may not be repeated.

[0035] In addition, in the embodiments described below, when the number, amount, etc. are mentioned, unless otherwise specified, the scope of the present technology is not necessarily limited to the number, amount, etc. In addition, in the following embodiments, unless otherwise specified, each component is not necessarily essential to the present technology. In addition, the present technology is not necessarily limited to exerting all the effects mentioned in the present embodiment.

[0036] In addition, in this specification, the descriptions of "comprise", "include", and "have" are open-ended. That is, when a certain structure is included, other structures other than the structure may be included or not included.

[0037] In addition, in this specification, when geometrical terms and terms indicating position and direction relationships, such as "parallel", "orthogonal", "oblique 45°", "coaxial", "along", etc., are used, these terms allow for manufacturing errors or slight changes. In this specification, when terms such as "upper side" and "lower side" are used to indicate relative positional relationships, these terms are used as terms indicating relative positional relationships in one state, and the relative positional relationship can be flipped or rotated to any angle depending on the installation direction of each mechanism (for example, turning the entire mechanism upside down, etc.).

[0038] Figure 1 is a top view of the positioning fixture. Figure 2 yes Figure 1 The II-II section view in Figure 3 It means from Figure 2 This is a plan view of the substrate 10 when viewed from the III-III direction.

[0039] like Figure 2 As shown, the positioning and fixing device of this embodiment can perform relative positioning of the base 10 (first mechanism) and the tray 20 (second mechanism) and fix the base 10 and the tray 20 to each other.

[0040] The tray 20 is a fixed object fixed to the base 10. For example, a workpiece for cutting is mounted on the tray 20. In addition, the tray 20 is an example of a fixed object, and the fixed object in the present technology is not limited to this. For example, a mold or the like can be used as a fixed object instead of the tray 20. The base 10 can be fixed to a stationary object or supported by a rotating support mechanism or the like to be movable. In addition, the positioning and fixing device of the present technology can also be applied to a robot (arm, etc.).

[0041] The base 10 has a fitting hole 10A (first fitting hole) and a reference surface 10B (first reference surface). The tray 20 has a fitting hole 20A (second fitting hole) and a reference surface 20B (second reference surface). The reference surfaces 10B and 20B are opposite to each other along the Z-axis direction (first direction). The fitting holes 10A and 20A are respectively provided in a manner of opening on the reference surfaces 10B and 20B.

[0042] The reference member 100 (first member) is fixed to the base 10 . The annular engaging member 200 (second member) is fixed to the tray 20 .

[0043] Figure 4 yes Figure 2 An enlarged view of section IV in FIG. Figure 5 yes Figure 4 VV section view in.

[0044] like Figure 4As shown, the reference member 100 includes an engagement convex portion 110 (tapered convex portion), a fitting cylindrical portion 120 (cylindrical portion), a reference flange portion 130 (reference portion), and an internal thread portion 140. The engagement convex portion 110, the fitting cylindrical portion 120, and the reference flange portion 130 are integrally formed.

[0045] The engagement projection 110 protrudes from the reference surface 10B of the base 10 toward the tray 20 along the Z-axis direction. The outer peripheral surface of the engagement projection 110 forms an engagement tapered surface 110A (first tapered surface) whose diameter decreases toward the tray 20 (upper side in the figure).

[0046] The engaging protrusion 110 is provided on the opposite side (upper side in the figure) of the base 10 relative to the reference flange 130. Therefore, the engaging tapered surface 110A is formed separately from the reference surface 10B of the base 10 along the Z-axis direction. By providing the reference flange 130 between the engaging protrusion 110 and the base 10, the height H from the reference surface 10B to the top of the engaging protrusion 110 becomes larger. As a result, the deformation of the engaging protrusion 110 in the tilting direction (direction intersecting the Z-axis) is promoted.

[0047] The fitting cylinder 120 is pressed into the fitting hole 10A in such a manner that the press-fit abutment surface 120A is in close contact with the inner peripheral surface of the fitting hole 10A of the base 10. Thus, the reference member 100 is fixed to the base 10. An annular gap is formed between the bottom surface of the fitting hole 10A and the lower end surface of the fitting cylinder 120. In addition, the reference member 100 may be fixed by a method other than press-fitting.

[0048] The reference flange 130 has an abutting surface 130A that abuts against the reference surface 10B of the base 10. The reference flange 130 is formed to protrude toward the outer diameter side along the XY plane direction orthogonal to the Z-axis direction relative to the engaging protrusion 110. As an example, the ratio (D2 / D1) of the diameter D2 of the reference flange 130 and the outermost diameter D1 of the engaging protrusion 110 is, for example, about 1.1 or more and 1.3 or less.

[0049] The internal thread portion 140 is formed on the inner periphery of the fitting cylindrical portion 120. When the reference member 100 is removed from the base 10, a rod-shaped tool is screwed into the internal thread portion 140 and the tool is pulled to remove the fitting cylindrical portion 120 press-fitted into the fitting hole 10A.

[0050] The annular engaging member 200 includes an annular portion 210, a bottom portion 220, and an internal thread portion 230. The annular portion 210 and the bottom portion 220 are integrally formed.

[0051] The annular portion 210 has an engagement tapered surface 210A (second tapered surface) and a press-fit contact surface 210B. The engagement tapered surface 210A can engage with the engagement tapered surface 110A (first tapered surface) of the engagement projection 110 when the tray 20 is positioned and fixed.

[0052] The annular engaging member 200 is pressed into the fitting hole 20A in such a manner that the press-fit abutting surface 210B of the annular portion 210 is in close contact with the inner circumferential surface of the fitting hole 20A of the tray 20. The annular engaging member 200 is pressed until the upper surface of the bottom 220 abuts against the bottom surface of the fitting hole 20A. Thus, the annular engaging member 200 is fixed to the tray 20. In addition, the annular engaging member 200 may be fixed by a method other than press-fitting. The annular engaging member 200 is arranged substantially concentrically with the reference member 100.

[0053] The internal thread portion 230 is formed on the inner periphery of the bottom portion 220. That is, the internal thread portion 230 is provided at a position different from the engagement tapered surface 210A in the Z-axis direction. When the annular engagement member 200 is removed from the tray 20, the annular portion 210 pressed into the engagement hole 20A is pulled out by screwing a rod-shaped tool into the internal thread portion 230 and pulling the tool.

[0054] like Figure 5 As shown in FIG. 1 , a slit portion 110B is formed in the circumferential direction of the engagement protrusion 110 of the reference member 100 to cut off the engagement protrusion 110. The slit portion 110B may also be formed (partially) in a part of the engagement protrusion 110 in the height direction (Z-axis direction). Figure 5 In the example of , four slits 110B are formed in a manner evenly arranged in the circumferential direction, but the number of slits 110B can be appropriately changed. By providing the slits 110B, deformation of the engaging protrusion 110 in the tilting direction (direction intersecting the Z axis) is promoted.

[0055] like Figure 1 and Figure 2 As shown, the base 10 and the tray 20 are fixed by four bolts 300. The bolt 300 includes a head 310 and a shaft 320. The head 310 of the bolt 300 abuts against the tray 20, and the shaft 320 of the bolt 300 is threadedly engaged with the base 10. By applying a tightening force to the bolt 300, the base 10 and the tray 20 are pulled closer to each other.

[0056] The base 10 is set in a state of being fixed on a workbench of a machine tool, for example. One or more workpieces (not shown) are fixed to the pallet 20 by a clamping device or bolts (not shown). The pallet 20 is transported onto the base 10, and after the two are mutually positioned and fixed in the horizontal direction (XY plane direction) and the vertical direction (Z axis direction), one or more workpieces on the pallet 20 are machined.

[0057] As an example, the base 10 and the tray 20 are respectively formed of a substantially square or substantially rectangular steel flat plate member. The reference surface 10B (upper surface) of the base 10 functions as a horizontal reference seat surface for placing the tray 20 and seating the reference surface 20B (lower surface) of the tray 20 to position the tray 20 in the vertical direction. The reference surface 20B of the tray 20 is formed to be able to abut against the reference surface 10B of the base 10 in a surface contact state. The reference surfaces 10B and 20B are in contact with each other, thereby performing positioning in the Z-axis direction.

[0058] The reference member 100 (and the annular engagement member 200 ) are provided substantially concentrically with two of the four bolts 300 . That is, the bolts 300 penetrate the reference member 100 and the annular engagement member 200 .

[0059] like Figure 3 As shown, the pair of reference members 100 are located at positions separated from each other on the diagonal lines of the base 10 and the tray 20. Thus, positioning in the horizontal direction (XY plane direction) is performed.

[0060] As described above, when the tightening force is applied to the four bolts 300, the base 10 and the tray 20 approach each other along the Z-axis direction, and the reference surfaces 10B and 20B abut against each other. Thus, the base 10 and the tray 20 are relatively positioned in the Z-axis direction.

[0061] At this time, the engaging protrusion 110 of the reference member 100 is elastically deformed toward the inner diameter side. Through this elastic deformation, the engaging conical surface 110A (the first conical surface) and the engaging conical surface 210A (the second conical surface) are in close contact with each other. Thus, the base 10 and the tray 20 are relatively positioned in the X-axis direction and the Y-axis direction (XY plane direction). In addition, in a state where the engaging conical surfaces 110A and 210A are only in contact, the reference surfaces 10B and 20B are not in contact with each other. From this state, the bolt 300 is further screwed in, and the engaging protrusion 110 is elastically deformed while the base 10 and the tray 20 are brought closer to each other until the reference surfaces 10B and 20B are in contact with each other.

[0062] In the positioning and fixing device of this embodiment, the above operation realizes two-sided constraint based on the contact of the reference surfaces 10B and 20B and the contact of the engaging tapered surfaces 110A and 210A, thereby enabling the relative positioning of the base 10 and the tray 20 to be performed with high precision and the base 10 and the tray 20 to be fixed to each other.

[0063] When the tightening force from the four bolts 300 is removed, the reference surfaces 10B and 20B are separated from each other, and the tray 20 can be removed from the base 10. At this time, the engaging projection 110 of the reference member 100 returns to the shape before the elastic deformation.

[0064] When seeking to miniaturize the positioning and fixing device, if the diameter of the reference member 100 and the annular engaging member 200 is reduced, the contact area between the engaging conical surface 110A and the engaging conical surface 210A is also reduced as the diameter is reduced. In the case of simply reducing the diameter of the reference member 100 and the annular engaging member 200, the contact area between the engaging conical surface 110A and the engaging conical surface 210A is reduced, and even if the same degree of surface pressure as before the reduction is applied, the elastic deformation amount of the engaging protrusion 110 to the inner diameter side is also likely to become smaller. As a result, there may be a situation where the desired deformation amount required for positioning and fixing cannot be obtained. If the thickness of the engaging protrusion 110 is reduced, the elastic deformation amount can be increased, but the thinning of the engaging protrusion 110 has the problem that the deformation amount becomes too large and plastic deformation may occur in addition to the manufacturing constraints.

[0065] In contrast, in the positioning and fixing device of the present embodiment, by providing the reference flange portion 130 between the engaging protrusion 110 and the base 10, the height H from the reference surface 10B to the top of the engaging protrusion 110 can be increased. Thus, the elastic deformation amount of the engaging protrusion 110 toward the inner diameter side can be increased. In addition, since the slit portion 110B is provided in a manner that cuts off the engaging protrusion 110 in the circumferential direction, the elastic deformation amount of the engaging protrusion 110 toward the inner diameter side can be further increased. As a result, a miniaturized positioning and fixing device can be obtained.

[0066] Furthermore, by forming the fitting hole 20A more deeply, it is possible to absorb the increase in the height H from the reference surface 10B to the top of the engaging protrusion 110. The positioning and fixing device of this embodiment reduces the reference member 100 and the annular engaging member 200 in the radial direction (XY plane direction) and increases the reference member 100 and the annular engaging member 200 in the axial direction (Z axis direction), and the increase is absorbed by the plate thickness of the tray 20 (the depth of the fitting hole 20A).

[0067] Figure 6 , Figure 7 1 and 2 are diagrams showing the press-fitting process of the reference member 100 and the annular engaging member 200. When the reference member 100 is fixed to the base 10, as shown in FIG. Figure 6 As shown, the press-in tool 400 is brought into contact with the upper surface of the reference flange 130 and pushed in the direction of arrow A, thereby pressing the fitting cylinder 120 into the fitting hole 10A of the base 10. When the annular engaging member 200 is fixed to the tray 20, as shown in FIG. Figure 7 As shown, the press-in tool 400 is brought into contact with the front end of the annular portion 210 , and the press-in tool 400 is pushed in the direction of arrow B, thereby press-fitting the annular portion 210 into the fitting hole 20A of the tray 20 .

[0068] In the press-fitting step ( Figure 6) and the press-fitting step of the annular engaging member 200 ( Figure 7 ), the same pressing tool 400 can be used.

[0069] Figure 8 is a side sectional view of a positioning and fixing device of a modified example. Figure 8 As shown, the annular engagement member 200 may be fixed to the base 10 and the reference member 100 may be fixed to the tray 20. In this case, the tray 20 constitutes the "first mechanism" and the base 10 constitutes the "second mechanism".

[0070] In addition, the reference flange portion 130 may not be provided. Also, the internal thread portions 140 and 230 may not be provided.

[0071] Although the embodiments of the present technology have been described above, the embodiments disclosed this time should be considered to be illustrative in all aspects and not restrictive. The scope of the present technology is indicated by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0072] Description of Reference Numerals

[0073] 10. Base; 10A. Fitting hole; 10B. Reference surface; 20. Tray; 20A. Fitting hole; 20B. Reference surface; 100. Reference member; 110. Engaging convex portion; 110A. Engaging conical surface; 110B. Slit portion; 120. Engaging cylinder portion; 120A. Press-fit abutment surface; 130. Reference flange portion; 130A. Abutment surface; 140. Internal thread portion; 200. Annular fitting member; 210. Annular portion; 210A. Engaging conical surface; 210B. Press-fit abutment surface; 220. Bottom portion; 230. Internal thread portion; 300. Bolt; 310. Head portion; 320. Rod portion; 400. Press-fit tool.

Claims

1. A positioning and fixing device, which can perform relative positioning of a first mechanism and a second mechanism and fix the first mechanism and the second mechanism to each other, in, The positioning and fixing device has: a first member fixed to the first mechanism; and a second member fixed to the second mechanism, The first mechanism includes a first reference surface and a first fitting hole provided so as to open on the first reference surface. The second mechanism includes a second reference surface facing the first reference surface along the first direction, and a second fitting hole provided so as to open on the second reference surface. The first member includes: a cylindrical portion, which is pressed into the first fitting hole; a tapered convex portion, which protrudes from the first reference surface along the first direction toward the second mechanism side and has a first tapered surface whose diameter decreases as it moves toward the second mechanism side; and a reference portion, which abuts against the first reference surface, and the cylindrical portion, the tapered convex portion and the reference portion are formed integrally. The second member is press-fitted into the second fitting hole, and the second member includes an annular portion having a second tapered surface that can engage with the first tapered surface. The reference portion of the first member protrudes toward the outer diameter side than the tapered convex portion in a direction perpendicular to the first direction. When the first mechanism and the second mechanism are brought close to each other along the first direction and the first reference surface is brought into contact with the second reference surface, the first conical surface and the second conical surface are brought into close contact with each other through elastic deformation of the conical convex portion toward the inner diameter side, thereby performing relative positioning of the first mechanism and the second mechanism in a planar direction orthogonal to the first direction.

2. A positioning and fixing device capable of relative positioning of a first mechanism and a second mechanism and fixing the first mechanism and the second mechanism to each other, in, The positioning and fixing device has: a first member fixed to the first mechanism; and a second member fixed to the second mechanism, The first mechanism includes a first reference surface and a first fitting hole provided so as to open on the first reference surface. The second mechanism includes a second reference surface facing the first reference surface along the first direction, and a second fitting hole provided so as to open on the second reference surface. The first member includes: a cylindrical portion, which is pressed into the first fitting hole; a tapered convex portion, which protrudes from the first reference surface along the first direction toward the second mechanism side and has a first tapered surface whose diameter decreases as it moves toward the second mechanism side; and a reference portion, which abuts against the first reference surface, and the cylindrical portion, the tapered convex portion and the reference portion are formed integrally. The second member is press-fitted into the second fitting hole, and the second member includes an annular portion having a second tapered surface that can engage with the first tapered surface. A slit portion is formed in the circumferential direction of the tapered convex portion so as to at least partially cut off the tapered convex portion. When the first mechanism and the second mechanism are brought close to each other along the first direction and the first reference surface is brought into contact with the second reference surface, the first conical surface and the second conical surface are brought into close contact with each other through elastic deformation of the conical convex portion toward the inner diameter side, thereby performing relative positioning of the first mechanism and the second mechanism in a planar direction orthogonal to the first direction.

3. The positioning and fixing device according to claim 1 or 2, in, The first tapered surface of the first member is formed to be separated from the first reference surface along the first direction.

4. The positioning and fixing device according to any one of claims 1 to 3, in, An internal thread portion is formed on an inner periphery of the cylindrical portion of the first member.

5. The positioning and fixing device according to any one of claims 1 to 4, in, An internal thread portion is formed on an inner periphery of the second member, and the internal thread portion is provided at a position different from the second tapered surface in the first direction.

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