WO2020148847A1 - パレットクランプ - Google Patents
パレットクランプ Download PDFInfo
- Publication number
- WO2020148847A1 WO2020148847A1 PCT/JP2019/001198 JP2019001198W WO2020148847A1 WO 2020148847 A1 WO2020148847 A1 WO 2020148847A1 JP 2019001198 W JP2019001198 W JP 2019001198W WO 2020148847 A1 WO2020148847 A1 WO 2020148847A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- clamp
- pallet
- key
- shaft
- receiving portion
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q7/00—Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
- B23Q7/008—Catching devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/0063—Connecting non-slidable parts of machine tools to each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B5/00—Clamps
- B25B5/02—Clamps with sliding jaws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/0063—Connecting non-slidable parts of machine tools to each other
- B23Q1/0072—Connecting non-slidable parts of machine tools to each other using a clamping opening for receiving an insertion bolt or nipple
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/0063—Connecting non-slidable parts of machine tools to each other
- B23Q1/0081—Connecting non-slidable parts of machine tools to each other using an expanding clamping member insertable in a receiving hole
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/10—Auxiliary devices, e.g. bolsters, extension members
- B23Q3/102—Auxiliary devices, e.g. bolsters, extension members for fixing elements in slots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
- B23Q3/183—Centering devices
Definitions
- the disclosed technology relates to pallet clamps.
- a pallet clamp is a device (mechanism) that fixes the pallet to which the workpiece to be machined is attached on the table of the machine tool in a positioned state.
- Conventional pallet clamps are disclosed in Patent Document 1 and Patent Document 2.
- Patent Document 1 discloses a pallet clamp that positions by inserting a plurality of positioning pins provided on a table into a plurality of positioning holes formed in a pallet.
- Patent Document 2 discloses a pallet clamp that pulls and fixes a pallet on a table with a collet.
- a collet is accommodated at a plurality of positions on the table, and a cylindrical piston pin having a narrowed tapered surface at its tip portion is provided.
- seats having pull studs and tapered receiving surfaces that spread around the pull studs are provided.
- each pallet is positioned on the table by fitting each tapered surface to each tapered receiving surface. Then, the collet holds the pull stud and pulls it toward the table, whereby the pallet is fixed to the table.
- the tapered portion of the pallet clamp of Patent Document 2 has a sliding structure, there is always a gap in the sliding guide portion. Therefore, the pallet clamp of Patent Document 2 also has a problem in positioning accuracy.
- the present inventor has focused on a chuck (a device that fixes a workpiece to be processed while rotating at a high speed) that is completely different in usage. Then, through intensive studies, it was found that an excellent pallet clamp capable of solving these problems can be realized by applying to the pallet clamp a technology capable of increasing the mounting reproduction accuracy of the top jaws in the chuck.
- the purpose of the disclosed technology is to provide a pallet clamp that can realize highly accurate positioning and firm fixing while having a simple and compact structure in which the pallet can be placed low.
- the disclosed technology relates to a pallet clamp that fixes the pallet while positioning it on the table.
- the pallet clamp includes a clamp receiving portion provided on the back surface of the pallet, a clamp portion provided on the installation surface of the table so as to face the clamp receiving portion, the clamp receiving portion and the clamp portion, A pressure-bonding portion that is pressure-bonded by a biasing means in a direction perpendicular to the installation surface.
- the clamp receiving portion has a contacted surface with serrations formed at the crimping portion.
- the clamp portion has a contact surface on which a serration is formed in close contact with the contacted surface.
- One of the clamp receiving portion and the clamp portion has both a pressing surface and a non-pressing surface facing in the direction in which the serration irregularities are arranged and in the extending direction, or each of the clamp receiving portion and the clamp portion,
- the pressing surface and the counter pressing surface are individually provided.
- the biasing means press-fits the clamp receiving portion and the clamp portion, and the contact surface and the contact surface come into close contact with each other, so that the pressing surface and the counter-pressing surface are mutually separated. It is configured to be pressed in the opposite direction.
- a key member interposed between the clamp receiving portion and the clamp portion is further provided, and the clamp receiving portion has a key groove formed on the abutted surface so as to traverse the serration.
- the clamp portion has a support groove formed in the contact surface so as to traverse the serration and facing the key groove, and the key member includes a key portion fitted in the key groove, A support portion fitted into the support groove, the support portion being fitted into the support groove in a state where it cannot be pulled out, and the key portion being fitted in the key groove with a gap.
- the key portion is configured to press the pressing surface and the counter pressing surface.
- the key groove is configured to incline with respect to the key portion when the key portion is fitted in the key groove in a non-crimped state.
- two of the key members are used for one of the pallet clamps, one of the key members is configured to press the pressing surface, and the other of the key members is configured to press the counter pressing surface. There is.
- one of the clamp receiving portion and the clamp portion is provided with a pair of restricting portions individually having the pressing surface and the anti-pressing surface so as to be apart from each other in the direction in which the serrations are arranged in a line. And the abutted surface are in close contact with each other, the clamp receiving portion and the clamp portion are relatively inclined, and the other of the clamp receiving portion and the clamp portion presses the pressing surface and the counter pressing surface. Is configured.
- one of the abutting surface and the abutting surface is provided with a crimping shaft having an inclined engaging surface at a side portion, and a pin hole positioned away from the crimping shaft, A shaft hole facing the crimping shaft and a restriction pin facing the pin hole are provided on the other of the contact surface and the contact surface, and the tip end portion of the shaft hole corresponds to the engagement surface.
- a retracting shaft that engages is provided in the shaft hole so as to project laterally, the regulating pin is inserted into the pin hole, the crimp shaft is inserted into the shaft hole, and the contact surface is And the contacted surface are in contact with each other, the retracting shaft is projected into the shaft hole, so that the crimping shaft is drawn into the shaft hole and the contact surface and the contacted surface are in close contact with each other.
- the crimping shaft presses the wall surface of the shaft hole
- the regulating pin presses the wall surface of the pin hole in the opposite direction to the crimping shaft.
- FIG. 3 is a schematic perspective view showing a cross section of the pallet clamp (first form) (a cross section taken along the line XX in FIG. 2) and the outer shape of the key member. It is a figure explaining the positioning of a pallet clamp (1st form), and a fixed operation. It is a schematic perspective view which shows the cross section of a pallet clamp (2nd form), and the external shape of a key member. It is a figure explaining the positioning of a pallet clamp (2nd form), and a fixed operation.
- FIG. 1 illustrates a pallet clamp 100A to which the disclosed technology is applied.
- the pallet clamp 100A is used for the machine tool 200 (for example, a machining center).
- the machine tool 200 has a table 201 that extends substantially horizontally, and the upper part thereof is a work area for machining. Before performing the machining, the plate-shaped pallet 300 to which the work W is attached is placed on the table 201.
- a pallet clamp 100A is provided between the pallet 300 and the table 201 in order to fix the pallet 300 on the table 201 with high accuracy.
- the number and arrangement of the pallet clamps 100A can be appropriately selected depending on the size and shape of the pallet 300. For example, when the pallet 300 is small, the number of pallet clamps 100A may be one. This embodiment exemplifies a case where four pallet clamps 100A are installed at four positions apart from the table 201.
- the disclosed pallet clamp 100A has a simpler and more compact structure than the conventional pallet clamp. Therefore, the member cost is also low. Then, the pallet 300 can be arranged lower than the conventional one. Moreover, the pallet 300 can be accurately positioned and firmly fixed by a simple operation.
- the pallet clamp 100A is applied with "serration (sawtooth meshing structure)" used for a chuck positioning mechanism.
- FIG. 2 shows an enlarged view of one of the pallet clamps 100A.
- FIG. 3 shows a sectional view of the pallet clamp 100A.
- the pallet clamp 100A has a clamp receiving portion 110, a clamp portion 130, and a biasing means 150 as its basic configuration.
- the clamp receiver 110 is provided on the back surface of the pallet 300.
- the clamp part 130 is provided on the installation surface 201 a of the table 201.
- the biasing means 150 presses the clamp receiving portion 110 and the clamp portion 130 in a direction perpendicular to the installation surface 201a.
- the pallet clamp 100A of this form further includes a key member 170.
- the key member 170 is interposed between the clamp receiving portion 110 and the clamp portion 130.
- the clamp receiving portion 110 is made of a rectangular plate-shaped (rectangular parallelepiped) metal mass having a large thickness. Of the two plate surfaces of the clamp receiving portion 110, one plate surface (mounting surface 110a) side is fixed to the back surface of the pallet 300. As a result, the other plate surface side of the clamp receiving portion 110 facing the lower side of the pallet 300 constitutes a crimping portion to be crimped to the clamp portion 130. A contacted surface 111 on which serrations 111a are formed is formed at the crimped portion.
- the serration 111a has a known sawtooth meshing structure.
- the serration 111a is composed of a group of linear convex portions and linear concave portions each having a substantially triangular concavo-convex pattern having a continuous cross-sectional shape.
- the cross-sectional shape of the serration 111a having such a structure is formed so as to extend in the width direction (direction of the short side) of the contacted surface 111.
- the direction in which the serration extends in the width direction is also referred to as the “direction in which the serration extends”.
- a key groove 112 is formed in the center portion of the contacted surface 111 in the width direction so as to cross the serration 111a.
- the key groove 112 is a groove having a rectangular cross section.
- the key groove 112 is formed so as to extend in the length direction (direction of the long side) of the contacted surface 111 and penetrate both ends of the clamp receiving portion 110.
- the contacted surface 111 is divided into two by the key groove 112.
- a band-shaped region of the pair of serrations 111a is formed on both sides of the key groove 112.
- the key groove 112 is formed so as to extend in the direction in which the irregularities of the serrations 111a are arranged.
- a bolt hole 113 penetrating the mounting surface 110a is formed in a substantially central portion of the key groove 112 (a substantially central portion of the clamp receiving portion 110).
- Each clamp part 130 is arranged at each position of the table 201 so as to face each clamp receiving part 110 arranged at each position of the pallet 300.
- the clamp part 130 is also made of a thick rectangular plate-shaped metal mass. Of the two plate surfaces of the clamp part 130, one plate surface (mounting surface 130a) side is fixed to the installation surface 201a of the table 201. Specifically, the clamp portion 130 is fastened to the table 201 with bolts 131 (two in this embodiment). The side of the other plate surface of the clamp portion 130 facing the upper side of the table 201 constitutes a crimping portion to be crimped to the clamp receiving portion 110. An abutting surface 132 having serrations 132a is formed on the crimped portion.
- the abutment surface 132 is formed with serrations 132a that come into close contact with the abutted surface 111 so as to extend in the width direction (direction of the short side).
- a support groove 133 is formed in the center portion of the contact surface 132 in the width direction so as to cross the serration 132a.
- the support groove 133 is a groove having a rectangular cross section.
- the support groove 133 is formed so as to extend in the length direction (direction of the long side) of the contact surface 132 and penetrate both ends of the clamp portion 130. As a result, the contact surface 132 is divided into two by the support groove 133. Further, a pair of belt-shaped regions of the serrations 132a are formed on both sides of the support groove 133.
- the support groove 133 extends in the direction in which the concavities and convexities of the serrations 132a are arranged. Therefore, the support groove 133 is configured to face the key groove 112 and overlap with the key groove 112 when the contact surface 132 comes into close contact with the contacted surface 111.
- a fastening hole 134 (a hole having a female screw, the same applies hereinafter) is formed at a substantially central portion of the support groove 133 so as to penetrate the mounting surface 130a.
- a lateral screw hole 135 is formed on each side surface of the clamp portion 130 so as to penetrate the side surface of the support groove 133.
- the lateral screw holes 135 are arranged at distant positions on the respective ends of the support groove 133.
- Key fastening bolts 136 having conical tips are screwed into the lateral screw holes 135, respectively.
- the tip of the key stop bolt 136 is configured to project into the support groove 133.
- the key member 170 is made of a metal plate member having a long side.
- the key member 170 has a thick plate-shaped key portion 171 and a thick plate-shaped support portion 172 longer than the key portion 171.
- the key portion 171 is configured integrally with the support portion 172 so as to be laminated on the support portion 172 at a substantially central portion in the longitudinal direction.
- the key portion 171 has a portion having a smaller width and a portion having a larger width than the width of the key groove 112.
- the width of the support portion 172 is slightly smaller than the width of the support groove 133.
- An insertion hole 173 that penetrates the key portion 171 and the support portion 172 in the thickness direction is formed substantially at the center of the key member 170.
- a pair of relatively slightly projecting action portions 174 and 174 are provided by cutting off a part of each side surface with a constant thickness.
- the width W1 of each end of the key portion 171 including one of the action portions 174 is formed smaller than the width W2 of the key groove 112, and the width of the key portion 171 including both of the action portions 174 is increased.
- the maximum width W3 is formed to be slightly larger than the width W2 of the key groove 112 (W1 ⁇ W2 ⁇ W3).
- a pair of conical recesses 175, 175 into which the tips of the key fastening bolts 136 are fitted are formed at diagonal positions (the same diagonal positions as the operating portion 174 of the key portion 171) on each side surface of the support portion 172. ..
- the support portion 172 is fitted into the support groove 133 in a state where it cannot be pulled out, by a pair of key fastening bolts 136 and 136.
- the insertion hole 173 is configured to overlap the fastening hole 134.
- the abutted surface 111 comes into contact with the abutting surface 132 in a state where the serrations 111a and 132a of the two are loosely meshed, and the key portion 171 enters the key groove 112.
- the key portion 171 is fitted into the key groove 112 with a gap in the width direction.
- the bolt hole 113 overlaps the insertion hole 173 and the fastening hole 134.
- the fastening bolt 151 is inserted into the bolt hole 113 and the insertion hole 173 which are overlapped with each other, and the fastening bolt 151 is screwed into the fastening hole 134. As a result, the clamp receiving portion 110 and the clamp portion 130 are pressed against each other in the direction perpendicular to the installation surface 201a. That is, in the pallet clamp 100A, the fastening bolt 151 constitutes the biasing means 150.
- the serrations 111a and 132a come into positive mesh with each other, and the contacted surface 111 and the contacting surface 132 come into close contact with each other. Then, in the direction in which the irregularities of the serrations 111a (132a) are lined up (longitudinal direction of the contacted surface 111), the clamp receiving portion 110 is accurately positioned and firmly fixed to the clamp portion 130.
- the clamp receiving portion 110 becomes parallel to the clamp portion 130, and the center lines in the width direction of the clamp receiving portion 110 coincide with each other.
- the key portion 171 constitutes the positioning mechanism. Therefore, when the contact surface 132 and the contacted surface 111 come into close contact with each other, one acting portion 174 of the key portion 171 comes into contact with one side surface of the key groove 112, as indicated by a white arrow in FIG. The other acting portion 174 of the key portion 171 comes into contact with and presses the other side surface of the key groove 112.
- one acting portion 174 of the key portion 171 pushes one side surface of the key groove 112 outward, and the other acting portion 174 of the key portion 171 pushes the other side surface of the key groove 112 outward.
- the clamp receiving portion 110 is pressed from the inside in opposite directions via both side surfaces of the key groove 112. Therefore, even in the direction in which the serrations 111a extend (the width direction of the contacted surface 111), the serrations 111a can be positioned with high accuracy and firmly fixed.
- one side surface of the key groove 112 corresponds to the pressing surface 180 and the other side surface of the key groove 112 corresponds to the counter pressing surface 181.
- FIG. 5 shows a sectional view of the pallet clamp 100B of this embodiment.
- the basic configuration of the pallet clamp 100B is the same as that of the pallet clamp 100A described above. Therefore, members having the same structure and function are denoted by the same reference numerals, and a description thereof will be omitted, and different contents will be described (the same applies to other embodiments).
- two key members 170 are used for one pallet clamp 100B.
- the one key member 170 presses the pressing surface 180, and the other key member 170 presses the counter pressing surface 181.
- Each key member 170 is made of the same rectangular parallelepiped member having a horizontal and vertical width that is substantially the same as the width of the support groove 133.
- one side surface (non-acting portion 176) scrapes off a part of the side surface with a constant thickness, so that the side surface (acting portion 174) of the key portion 171 is smaller than the other side surface (acting portion 174). It is located on the center side in the width direction. Thereby, when fitted in the key groove 112, a gap is formed between the key groove 112 and the side surface of the key groove 112.
- a bolt hole 113 that penetrates the key portion 171 and the support portion 172 in the thickness direction is formed substantially at the center of the key member 170.
- Second fastening holes 134A are symmetrically formed on both sides of the fastening hole 134 in the support groove 133 of the clamp portion 130.
- Each key member 170 is clamped by the bolt 137 to the second fastening hole 134A in a state where the acting portion 174 and the non-acting portion 176 are opposite to the respective side surfaces of the key groove 112. It is fixed at 130.
- the fastening bolt 151 is screwed into the bolt hole 113 and the fastening hole 134 which are overlapped with each other. As the crimping by the fastening bolt 151 progresses, the contacted surface 111 and the contacting surface 132 come into close contact with each other. Then, the clamp receiving portion 110 is positioned with high accuracy and firmly fixed to the clamp portion 130 in the direction in which the irregularities of the serrations 111a are arranged.
- the arrangement and the size relationship are the same as the key portion 171 (see W1, W2, W3 in FIG. 6). Therefore, as shown by the white arrow in FIG. 6, the operating portion 174 of the one key member 170 contacts one side surface of the key groove 112, and the operating portion 174 of the other key member 170 contacts the key groove 112. It comes into contact with the other side and comes to press it.
- one side surface of the key groove 112 corresponds to the pressing surface 180, and the other side surface of the key groove 112 corresponds to the counter pressing surface 181.
- the key member 170 can be made small and simple, and since the two can be used together, it can be realized more simply and cheaper than the first embodiment. Moreover, since the distance between the pressing surface 180 and the counter-pressing surface 181 can be made larger than in the first embodiment, the positioning can be performed with higher accuracy and the fixing can be performed more firmly.
- FIG. 7 shows a sectional view of the pallet clamp 100C of this embodiment.
- the structure of the chuck is applied to the pallet clamp 100B of the second embodiment, so that the degree of freedom in arranging the key member 170 is increased.
- the support groove 133 is a groove having a substantially inverted T-shaped cross section.
- the support groove 133 has a narrow portion 133a having a relatively narrow width that opens to the contact surface 132, and a wide portion 133b that has a relatively wide width and is continuous with the narrow portion 133a.
- Each key member 170 has a substantially T-shaped cross section.
- Each key member 170 has a retaining portion 170a slidably fitted in the wide portion 133b, an intermediate step portion 170b fitted in a narrow portion 133a with a gap, and a gap in the key groove 112. It has the key part 171 fitted in the state.
- one side surface is located closer to the center side than the other side surface (acting portion 174), and when fitted into the key groove 112, the key groove It is the same as the second embodiment in that it is configured so that a gap is formed between it and the side surface of 112.
- a third fastening hole 134B that penetrates the key portion 171 and the support portion 172 in the thickness direction is formed substantially at the center of each key member 170.
- each key member 170 is inserted into the support groove 133 in a state in which each of the acting portion 174 and the non-acting portion 176 is opposite to each side surface of the key groove 112. Then, each key member 170 is positioned such that the two bolt holes 113 of the clamp receiving portion 110 and the third fastening hole 134B overlap each other, and the two fastening bolts 151 inserted into the respective bolt holes 113 are fixed. , And screw into each of the third fastening holes 134B.
- the clamp receiving portion 110 is positioned with high accuracy and firmly fixed to the clamp portion 130 in the direction in which the irregularities of the serrations 111a are arranged.
- the width W4 of the key groove 112 is larger than the width W1a of the key portion 171, and the width W1b of the middle step portion 170b is larger than the width W4 of the key groove 112. It is formed slightly larger (W1a ⁇ W4 ⁇ W1b). Therefore, as shown by the white arrow in FIG. 8, the operating portion 174 of the one key member 170 contacts one side surface of the key groove 112 and the operation of the other key member 170, as in the second embodiment. The portion 174 comes into contact with and presses the other side surface of the key groove 112. Thereby, even in the direction in which the serrations 111a extend, the serrations 111a can be positioned with high precision and firmly fixed.
- the key member 170 can be made small and simple, and the two can be used together, as in the second embodiment. Since the key member 170 can be moved according to the position of the bolt hole 113, the degree of freedom in arranging the key member 170 is increased.
- FIG. 9 shows a sectional view of the pallet clamp 100D of this embodiment.
- the key member 170 is omitted and the number of parts is reduced.
- the key groove 112 on the contacted surface 111 of the clamp receiving portion 110 is omitted, and the serration 111a is formed on the entire contacted surface 111.
- the serration 111a extends parallel to the short side of the clamp receiving portion 110.
- the support groove 133 of the contact surface 132 of the clamp part 130 is also omitted, and the serration 132a is formed over the entire contact surface 132.
- the serrations 132a of the clamp portion 130 extend parallel to the short sides of the clamp portion 130. Then, a pair of restricting portions 137, 137 are provided at diagonal positions of the clamp portion 130, which are separated from each other in the direction in which the irregularities of the serrations 132a are arranged.
- Each restriction portion 137 is formed of a wall-shaped convex portion that extends along the edge of the contact surface 132. These restricting portions 137 are configured such that when the clamp receiving portion 110 is attached to the clamp portion 130 without being fastened, the clamp receiving portion 110 is slightly inclined with respect to the clamp portion 130. That is, as shown in FIG. 9, the width W5 of the clamp portion 130 excluding the restriction portions 137 and 137 is formed to be slightly smaller than the width W6 of the clamp receiving portion 110.
- the clamp receiving portion 110 is positioned with high precision and firmly fixed to the clamp portion 130 in both the direction in which the irregularities of the serrations 111a are arranged and the extending direction.
- the pallet clamp 100D has the advantages that the structure is extremely simple and the number of parts is small. It is also possible to reverse the structure of the clamp part 130 and the structure of the clamp receiving part 110, such as the restricting part 137.
- FIG. 10 shows the overall structure of the pallet clamp 100E of this embodiment. Further, FIG. 11 shows a sectional view of a main part of the pallet clamp 100E. In this pallet clamp 100E, the biasing means 150 is incorporated into the pallet clamp 100E so as to facilitate automation.
- the key groove 112 of the contacted surface 111 of the clamp receiving portion 110 is omitted, and the serration 111a is formed in the entire contacted surface 111.
- the serration 111a of the clamp receiving portion 110 extends parallel to the short side of the clamp portion 130.
- the contact surface 111 is provided with a crimp shaft 153 and a pin hole 154.
- the crimping shaft 153 includes a base shaft portion 153a fixed to the clamp receiving portion 110, a small-diameter shaft main body 153b fixed to the base shaft portion 153a, and a large-diameter shaft head portion 153c provided at the tip of the shaft main body 153b. It has and protrudes perpendicularly from the approximate center of the contacted surface 111. On the side of the shaft body 153b of the shaft head portion 153c, an engagement surface 153d inclined in a conical shape is formed.
- the pin hole 154 is a round hole extending vertically from the contacted surface 111.
- the pin hole 154 is formed at a position distant from the crimping shaft 153 in the direction in which the irregularities of the serrations 111a are arranged.
- the support groove 133 of the contact surface 132 of the clamp portion 130 is also omitted, and the serration 132a is formed on the entire contact surface 132.
- the serrations 132a of the clamp portion 130 also extend parallel to the short sides of the clamp portion 130.
- the contact surface 132 is provided with a shaft hole 155 that faces the crimp shaft 153 and into which the crimp shaft 153 is inserted, and a restriction pin 156 that faces the pin hole 154 and is inserted into the pin hole 154. ing.
- the restriction pin 156 has a substantially rhombic cross section that is long in the direction in which the serrations 132a extend.
- a slight gap exists between the shaft hole 155 and the crimping shaft 153 (shaft head portion 153c) and between the pin hole 154 and the restriction pin 156 (long diameter side). Has been done.
- the clamp portion 130 is formed with a second lateral screw hole 153A penetrating from the side surface to the side surface of the shaft hole 155.
- a retracting shaft 157 having a conical tip portion is screwed into the second lateral screw hole 153A.
- the projecting end of the retracting shaft 157 is configured to project into the shaft hole 155.
- the end surface of the regulation pin 156 located on the retracting shaft 157 side constitutes an action portion 174 that exerts a positioning action.
- the pressing means 153, the shaft hole 155, the retracting shaft 157, etc. constitute the biasing means 150.
- the side surface of the shaft head portion 153c presses the wall surface (corresponding to the pressing surface 180) of the shaft hole 155 located on the side opposite to the retracting shaft 157.
- the clamp receiving portion 110 is displaced along the direction in which the serration 111a extends, but the wall surface of the pin hole 154 is the end surface of the regulation pin 156 located on the retracting shaft 157 side (action portion 174).
- the end surface of the restriction pin 156 presses the wall surface of the pin hole 154 (corresponding to the anti-pressing surface 181) in the direction opposite to the pressure-bonding shaft 153.
- the clamp receiving portion 110 is positioned with high precision and firmly fixed to the clamp portion 130 in both the direction in which the irregularities of the serration 111a are arranged and the extending direction. Since the urging means 150 is incorporated in the pallet clamp 100E, a method other than bolt fastening can be used as a means for crimping the pallet clamp, and automation can be facilitated.
- the disclosed technology is not limited to the above-described embodiment, and includes various configurations other than the above.
- the shape of the pallet clamp such as the clamp portion 130 and the clamp receiving portion 110 is an example.
- the shapes of these constituent members can be appropriately changed according to the specifications.
- the pallet clamp is used for manual clamping, but the structure of the fastening bolt 151 and the retracting shaft 157 may be changed to automatically clamp.
- At least one of the key groove and the support groove may be tilted. In short, it is sufficient that the serrations adhere to each other so that they are pressed in opposite directions.
- ⁇ Biasing means is not limited to bolt fastening.
- there are means such as pulling in by a piston driven by fluid pressure, pressing a cam by rotating it with a lever, urging by elasticity by a spring, or pressing a pallet from above by some method.
- the four pallet clamps do not necessarily have to have the biasing means, and another biasing means for pushing the vicinity of the center of the four may be provided.
- the above-mentioned pressing surface and anti-pressing surface may be appropriately combined depending on the specifications.
- one of the two 137 shown in FIG. 9 may be replaced with the pin hole 154 (or the crimping shaft 153) shown in FIG.
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Abstract
Description
図1に、開示する技術を適用したパレットクランプ100Aを例示する。パレットクランプ100Aは、工作機械200(例えばマシニングセンタ)に用いられる。
(第1の形態)
図2に、パレットクランプ100Aの1つを拡大して示す。図3に、そのパレットクランプ100Aの断面図を示す。
クランプ受部110は、厚みの大きな矩形板状(直方体状)の金属塊からなる。クランプ受部110が有する2つの板面のうち、一方の板面(取付面110a)の側がパレット300の裏面に固定されている。それにより、パレット300の下方に面するクランプ受部110の他方の板面の側は、クランプ部130に圧着される圧着部位を構成している。その圧着部位に、セレーション111aが形成された被当接面111が形成されている。
各クランプ部130は、パレット300の各所に配置された各クランプ受部110と対向するように、テーブル201の各所に配置されている。
鍵部材170は、一辺が長い金属の板状部材からなる。鍵部材170は、厚板状の鍵部171と、鍵部171よりも長い厚板状の支持部172とを有している。鍵部171は、支持部172の長手方向の略中央部に積層するように、支持部172と一体に構成されている。鍵部171は、キー溝112の幅よりも、幅が小さい部分と幅が大きい部分とを有している。支持部172の幅は支持溝133の幅よりも僅かに小さい。鍵部材170の略中央には、鍵部171及び支持部172を厚み方向に貫通する挿通孔173が形成されている。
これらパレットクランプ100Aによる、テーブル201へのパレット300の取り付け作業について説明する。まず、テーブル201に配置されている各クランプ部130の上に、各クランプ受部110が重なるようにパレット300を載置する。
図5に、本形態のパレットクランプ100Bの断面図を示す。パレットクランプ100Bの基本的な構成は、上述したパレットクランプ100Aと同じである。従って、同じ構造や機能の部材については、同じ符号を用いることでその説明は省略し、異なる内容について説明する(他の形態も同様)。
第1の形態と同様にして、互いに重なり合ったボルト孔113及び締結孔134に、締結ボルト151をねじ込む。締結ボルト151による圧着が進むと、被当接面111と当接面132とが密着する。そうすると、セレーション111aの凹凸が並ぶ方向において、クランプ受部110はクランプ部130に高精度に位置決めされ、強固に固定される。
図7に、本形態のパレットクランプ100Cの断面図を示す。このパレットクランプ100Cでは、第2の形態のパレットクランプ100Bにチャックの構造を応用することにより、鍵部材170の配置の自由度が高まるように工夫されている。
このパレットクランプ100Cでは、各鍵部材170が、作用部174及び非作用部176の各々が、キー溝112の各側面に対して逆向きになる状態で、支持溝133に挿入される。そうして、クランプ受部110の2つのボルト孔113と、第3の締結孔134Bとが互いに重なり合うように、各鍵部材170が位置決めされ、各ボルト孔113に挿入した2つの締結ボルト151を、第3の締結孔134Bの各々にねじ込む。
図9に、本形態のパレットクランプ100Dの断面図を示す。このパレットクランプ100Dでは、鍵部材170を省略し、部品点数が少なくなるように工夫されている。
このパレットクランプ100Dでは、クランプ受部110のボルト孔113に挿入した締結ボルト151を締結孔134にねじ込む。締結ボルト151による圧着が進むと、被当接面111と当接面132とが密着する。そうすると、クランプ部130に対して僅かに傾斜したクランプ受部110が平行となり、一方の規制部137と対向しているクランプ受部110の側面の端部が、その規制部137の対向面(押圧面180に相当)を押し付けるとともに、他方の規制部137と対向しているクランプ受部110の側面の端部の他方が、その規制部137の対向面(反押圧面181に相当)を押し付ける。
図10に、本形態のパレットクランプ100Eの全体構造を示す。また、図11に、パレットクランプ100Eの要部の断面図を示す。このパレットクランプ100Eでは、付勢手段150をパレットクランプ100Eに組み込むことにより、自動化が容易にできるように工夫されている。
このパレットクランプ100Eでは、図10に示すように、規制ピン156がピン孔154に挿入され、圧着軸153が軸孔155に挿入されるようにして、当接面132と被当接面111とを接触させる。そうした状態で、引込軸157をねじ込み、その突端部分を軸孔155に突出させていく。そうすることにより、引込軸157の突端部分が係合面153dに係合し、これらの傾斜によるスライド作用により、圧着軸153が軸孔155に引き込まれる。その結果、当接面132と被当接面111とが密着する。
開示する技術は、上述した実施形態に限定されず、それ以外の種々の構成をも包含する。例えば、クランプ部130やクランプ受部110など、パレットクランプの形状は一例である。これら構成部材の形状は、仕様に応じて適宜変更可能である。上述した実施形態では、手動でクランプするパレットクランプを示したが、締結ボルト151や引込軸157の構造を変更し、自動でクランプするようにしてもよい。
110 クランプ受部
111 被当接面
111a セレーション
112 キー溝
130 クランプ部
132 当接面
132a セレーション
133 支持溝
150 付勢手段
151 締結ボルト
170 鍵部材
180 押圧面
181 反押圧面
201 テーブル
300 パレット
Claims (6)
- パレットをテーブルに位置決めした状態で固定するパレットクランプであって、
前記パレットの裏面に設けられるクランプ受部と、
前記クランプ受部と対向するように、前記テーブルの設置面に設けられるクランプ部と、
前記クランプ受部と前記クランプ部とが、付勢手段によって前記設置面と垂直な方向に圧着される圧着部位と、
を備え、
前記クランプ受部は、その圧着部位に、セレーションが形成された被当接面を有し、
前記クランプ部は、その圧着部位に、前記被当接面に密着するセレーションが形成された当接面を有し、
前記クランプ受部及び前記クランプ部の一方が、セレーションの凹凸が並ぶ方向及び延びる方向に面する押圧面及び反押圧面の双方を有するか、又は、前記クランプ受部及び前記クランプ部の各々が、前記押圧面及び前記反押圧面を個別に有し、
前記付勢手段が前記クランプ受部と前記クランプ部とを圧着して、前記当接面と前記被当接面とが密着することにより、前記押圧面と前記反押圧面とが、互いに逆向きに押し付けられるように構成されているパレットクランプ。 - 請求項1に記載のパレットクランプにおいて、
前記クランプ受部と前記クランプ部との間に介在する鍵部材を、更に備え、
前記クランプ受部は、セレーションを横断するように前記被当接面に形成されたキー溝を有し、
前記クランプ部は、セレーションを横断するように前記当接面に形成されて前記キー溝と対向する支持溝を有し、
前記鍵部材は、前記キー溝に嵌合される鍵部と、前記支持溝に嵌合される支持部とを有し、
前記支持部は、抜け出し不能な状態で前記支持溝に嵌合されるとともに、前記鍵部は、前記キー溝に隙間を有した状態で嵌合され、
前記当接面と前記被当接面とが密着することにより、前記鍵部が、前記押圧面及び前記反押圧面を押し付けるように構成されているパレットクランプ。 - 請求項2に記載のパレットクランプにおいて、
前記鍵部が未圧着の状態で前記キー溝に嵌合されたときに、前記キー溝が前記鍵部に対して傾くように構成されているパレットクランプ。 - 請求項2又は請求項3に記載のパレットクランプにおいて、
前記鍵部材は、1つの前記パレットクランプに対して2つ用いられ、
前記鍵部材の一方が前記押圧面を押し付け、前記鍵部材の他方が前記反押圧面を押し付けるように構成されているパレットクランプ。 - 請求項1に記載のパレットクランプにおいて、
前記クランプ受部及び前記クランプ部の一方に、前記押圧面及び前記反押圧面を個別に有する一対の規制部が、セレーションの凹凸が並ぶ方向に離れるように設けられ、
前記当接面と前記被当接面とが密着することにより、前記クランプ受部と前記クランプ部とが相対的に傾き、前記クランプ受部及び前記クランプ部の他方が、前記押圧面及び前記反押圧面を押し付けるように構成されているパレットクランプ。 - 請求項1に記載のパレットクランプにおいて、
前記被当接面及び前記当接面の一方には、
傾斜した係合面を側部に有する圧着軸と、
前記圧着軸から離れて位置するピン穴と、
が設けられ、
前記被当接面及び前記当接面の他方には、
前記圧着軸と対向する軸穴と、
前記ピン穴と対向する規制ピンと、
が設けられ、
前記軸穴には、突端部分が前記係合面に係合する引込軸が、前記軸穴に側方から突出可能に設けられていて、
前記規制ピンが前記ピン穴に挿入され、前記圧着軸が前記軸穴に挿入され、かつ、前記当接面と前記被当接面とが接触した状態で、前記引込軸を前記軸穴に突出させることにより、前記圧着軸が前記軸穴に引き込まれて前記当接面と前記被当接面とが密着し、かつ、前記圧着軸が前記軸穴の壁面を押し付けるとともに、前記圧着軸とは逆向きに、前記規制ピンが前記ピン穴の壁面を押し付けるパレットクランプ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19910356.5A EP3900873B1 (en) | 2019-01-17 | 2019-01-17 | Pallet clamp |
US17/422,435 US11541510B2 (en) | 2019-01-17 | 2019-01-17 | Pallet clamp |
CN201980088519.0A CN113272096A (zh) | 2019-01-17 | 2019-01-17 | 托盘夹 |
KR1020217024442A KR102548916B1 (ko) | 2019-01-17 | 2019-01-17 | 파렛트 클램프 |
PCT/JP2019/001198 WO2020148847A1 (ja) | 2019-01-17 | 2019-01-17 | パレットクランプ |
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PCT/JP2019/001198 WO2020148847A1 (ja) | 2019-01-17 | 2019-01-17 | パレットクランプ |
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US (1) | US11541510B2 (ja) |
EP (1) | EP3900873B1 (ja) |
KR (1) | KR102548916B1 (ja) |
CN (1) | CN113272096A (ja) |
WO (1) | WO2020148847A1 (ja) |
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- 2019-01-17 KR KR1020217024442A patent/KR102548916B1/ko active IP Right Grant
- 2019-01-17 CN CN201980088519.0A patent/CN113272096A/zh active Pending
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Also Published As
Publication number | Publication date |
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EP3900873B1 (en) | 2023-11-22 |
EP3900873A4 (en) | 2021-12-22 |
KR102548916B1 (ko) | 2023-06-28 |
US11541510B2 (en) | 2023-01-03 |
US20220088749A1 (en) | 2022-03-24 |
CN113272096A (zh) | 2021-08-17 |
KR20210107859A (ko) | 2021-09-01 |
EP3900873A1 (en) | 2021-10-27 |
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