JP2022095108A - Clamp unit - Google Patents

Abstract

To provide a small-sized clamp unit, whose height direction can be accurately and easily adjusted while supporting a cutting tool.SOLUTION: A clamp unit comprises: a first member that is fixed to a table; a second member that supports a cutting tool and is fixed to the first member; and an adjustment mechanism for adjusting a position of the second member with respect to the first member in a height direction, while loosening a fixture for fixing the second member to the first member. The adjustment mechanism has a first inclined surface and a second inclined surface which are provided in one of the first member and the second member, and a first protruding member and a second protruding member made to protrude from the other of the first member and the second member. When the first inclined surface is pressed against a tip part of the first protruding member, the second member is displaced to one side in the height direction with respect to the first member, and when the second inclined surface is pressed against a tip part of the second protruding member, the second member is displaced to the other side in the height direction with respect to the first member.SELECTED DRAWING: Figure 1

Description

The present invention relates to a clamp unit for a cutting tool.

For example, in a machine tool such as a lathe, in order to adjust the height of a cutting tool once mounted on a tool post, a very complicated procedure such as loosening the mounting again and interposing a shim is required. On the other hand, the tool post of Patent Document 1 does not need to loosen the mounting of the cutting tool, and realizes the height adjustment of the cutting edge by using a screw and a wedge.

Japanese Unexamined Patent Publication No. 6-254706

When cutting is performed by using a plurality of cutting blades for one work according to the purpose of processing, there is a demand to adjust the height of each cutting blade accurately and easily. There is also a request to adjust the number of cutting tools to be juxtaposed according to the size of the machine tool.

The present invention has been made in order to meet such a demand, and is a small clamp unit that can be attached to a movable table of a machine tool, which can accurately and easily adjust in the height direction while supporting a cutting blade. Is to provide.

The clamp unit according to one aspect of the present invention is used by being fixed to a table that can be moved in a plane direction defined by a first axial direction and a second axial direction orthogonal to the first axial direction. A first member that is a unit and is fixed to the table, a second member that supports the cutting tool and is fixed to the first member, and a first fixing for fixing the first member to the table. With the tool, the second fixture for fixing the second member to the first member, and the second fixture loosened, the first in the third axial direction orthogonal to the first axial direction and the second axial direction. It is provided with an adjusting mechanism for adjusting the position of the second member with respect to the member, and the adjusting mechanism includes a first inclined surface and a second inclined surface provided on one of the first member and the second member, and a first. It has a first projecting member and a second projecting member that project from the other of the member and the second member, and when the first inclined surface is pressed against the tip of the first projecting member, the second member becomes the first. When the member is displaced to one side in the third axial direction and the second inclined surface is pressed against the tip of the second protruding member, the second member moves to the other side in the third axial direction with respect to the first member. It is a displacement.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a compact clamp unit capable of accurately and easily adjusting in the height direction while supporting a cutting tool.

It is an overall perspective view of the clamp unit which concerns on 1st Embodiment of this Embodiment. It is a perspective view of a tool side member and a related member. It is a perspective view of a pedestal side member and a related member. It is a front view of a pedestal side member and a related member. It is mainly a partial cross-sectional view of a pedestal side member for explaining the adjustment in a height direction. It is a perspective view of a pedestal side member and a fixture for fixing a pedestal side member to a table. It is an exploded perspective view of the clamp unit which concerns on 2nd Embodiment. It is an exploded perspective view of the clamp unit which concerns on 3rd Embodiment.

An embodiment of the present invention will be described with reference to the accompanying drawings. In each figure, those with the same reference numerals have the same or similar configurations. In addition, in each figure, when there are a plurality of structures having the same or similar structure, a code is added to a part of the structure and the same code is omitted from the other parts in order to avoid complication. There is.

FIG. 1 is an overall perspective view of the clamp unit 100 according to the first embodiment of the present embodiment. The clamp unit 100 in the present embodiment is a tool post that supports a cutting tool 300 that cuts a work piece fixed to a chuck of a lathe, and is fixed to a table 200 that is a feed base of a lathe. In the following description, as shown in the figure, any one of the plane directions in which the table 200 can move is defined as the z-axis direction, the direction orthogonal to the z-axis direction is defined as the x-axis direction, and the x-axis direction and the z-axis are described. The direction orthogonal to the direction is defined as the y-axis direction. Further, the y-axis direction may be referred to as a height direction, and in particular, the plus side shown in the figure may be referred to as an upper side and the minus side may be referred to as a lower side. In the following drawings, similar coordinate axes are also shown to indicate the orientation of each member.

The clamp unit 100 mainly includes a table side member 120 fixed to the table 200, and a tool side member 110 that supports a cutting tool 300 having a cutting blade and is fixed to the table side member 120. Further, a first fixture for fixing the table side member 120 to the table 200, a second fixture for fixing the tool side member 110 to the table side member 120, and a tool side member for the table side member 120 in the y-axis direction. It is provided with an adjustment mechanism for adjusting the position of 110.

The pedestal side member 120 has a substantially L shape when observed from the x-axis direction. The table 200 has two T-slots 210 extending in parallel in the x-axis direction, and the table-side member 120 is affected by the action of the T-slot 210 and the fixing screw 141 which is a part of the first fixing tool described above. It is fixed to the table 200. The specific configuration will be described in detail later.

The tool side member 110 has a substantially rectangular parallelepiped shape. The width of the tool-side member 110 in the x-axis direction is substantially the same as the width of the table-side member 120 in the x-axis direction, and the tool-side member 110 is arranged inside the L-shape of the table-side member 120 and clamped. The unit 100 as a whole has a substantially rectangular parallelepiped appearance.

The tool side member 110 has a mounting hole 111 for inserting and fixing the rear end portion of the cutting tool 300. The tool-side member 110 is provided with a mounting mechanism conforming to the PSC (polygon shank coupling) standard for a comb-blade lathe, and the inner peripheral surface of the mounting hole 111 is a polygon surface along the z-axis direction. When the rear end portion of the cutting tool 300 is inserted into the mounting hole 111 and fastened with the mounting screw 151 from the y-axis direction, the cutting tool 300 is fixed to the tool side member 110. Since the cutting blade is provided at the tip of the cutting tool 300, it can be said that the tool side member 110 functions as a support member for supporting the cutting blade.

The fixing screw 131 is the above-mentioned second fixing tool, for example, a hexagon socket head cap screw. When the adjusting mechanism is operated to displace the tool side member 110 in the y-axis direction, the fixing screw 131 is temporarily loosened.

FIG. 2 is a perspective view of the tool side member 110 and related members. When observed from the z-axis direction, the tool-side member 110 is provided with through holes 112 through which the fixing screw 131 penetrates at the upper two corners and through holes 113 at the lower two corners. The through hole 112 is provided in the thin plate portion 110a extending to the upper part of the tool side member 110, and the through hole 113 is provided in the block portion 110b together with the mounting hole 111. The through hole 113 has a counterbore for accommodating the head of the fixing screw 131. The xy cross sections of the respective through holes 112 and 113 form an oval shape in which the y-axis direction is the longitudinal direction according to the adjustment allowance in the y-axis direction by the adjustment mechanism.

The tool-side member 110 is provided with an upper female screw hole 115 and a lower female screw hole 116 arranged one above the other at a position between the two through holes 113. The upper female screw hole 115 and the lower female screw hole 116 each penetrate the block portion 110b in the z-axis direction, and are internally threaded over the entire length. The upper protruding screw 155, which is a set screw with a hexagonal hole, is engaged with the upper female screw hole 115, and the lower protruding screw 156, which is also a set screw with a hexagonal hole, is engaged with the lower female screw hole 116. Specifically, as will be described later, the upper protruding screw 155 advances and retreats the upper female screw hole 115 as a male screw by the work of the operator, and the tip portion 155a thereof can protrude from the back surface of the tool side member 110. Similarly, the lower protruding screw 156 advances and retreats the lower female screw hole 116 as a male screw by the work of the operator, and the tip portion 156b thereof can protrude from the back surface of the tool side member 110.

A guide groove 117 is provided on the back surface of the tool side member 110 from the thin plate portion 110a to the block portion 110b in parallel with the y-axis direction. The guide groove 117 functions as a guide for displacing the tool side member 110 along the y-axis direction.

FIG. 3 is a perspective view of the pedestal side member 120 and related members. Specifically, it shows how the guide key 160 and the rubber ring 130 are attached to the table side member 120. As described above, the pedestal side member 120 has an L-shape as a whole, and is divided into a vertical portion 120a and a horizontal portion 120b.

The vertical portion 120a of the pedestal side member 120 has four female screw holes 121 drilled along the z-axis direction. The female screw portion of the female screw hole 121 meshes with the male screw portion of the fixing screw 131 and has a function of fixing the tool side member 110 to the base side member 120. A coolant hole 122 provided so as to penetrate along the z-axis direction is opened on the same surface of the vertical portion 120a provided with the female screw hole 121, and a rubber ring 130 is provided so as to surround the opening. It is fitted. The coolant hole 122 is a flow hole for conducting the coolant to the cutting tool 300. The tool side member 110 is also provided with a coolant hole, and when the tool side member 110 is fixed to the table side member 120, the respective openings face each other. At this time, the rubber ring 130 is crushed to prevent the coolant from leaking. The size of both openings is adjusted according to the adjustment allowance in the y-axis direction by the adjustment mechanism.

The mortar hole 123 is provided on the surface of the vertical portion 120a corresponding to the positions of the upper protruding screw 155 and the lower protruding screw 156 that can protrude from the back surface of the tool side member 110. The mortar hole 123 is a hole drilled in a conical trapezoidal shape (so-called mortar shape) having a central axis parallel to the z-axis direction, and its side surface is such that the diameter of the cross-sectional circle becomes smaller as the depth becomes deeper in the z-axis direction. It is formed of an inclined surface. The mortar hole 123 constitutes a part of the adjusting mechanism. The specific action will be described later.

The guide key 160 is a guide member fixed so as to protrude from the vertical surface of the vertical portion 120a, and is fitted into the guide groove 117 of the tool side member 110 so that the tool side member 110 is attached to the base side member 120. Guide along the y-axis direction. The guide key 160 is fixed to the vertical portion 120a by the fixing screw 161.

A guide rib 127 that loosely fits with the T slot 210 of the table 200 is provided so as to project from the horizontal portion 120b. Further, two fitting holes 125 for inserting slot bolts, which will be described later, are provided along the x-axis direction so as to pass through the guide rib 127 and the horizontal portion 120b. Further, two female screw holes 126 are provided from the end surface of the horizontal portion 120b so as to communicate with each fitting hole 125 from the z-axis direction. The female screw hole 126 is internally threaded over the entire length. The vertical portion 120a is provided with a through hole 124 so as to penetrate along the y-axis direction. The through hole 124, the fitting hole 125, and the female screw hole 126 are used by a fixing tool for fixing the base member 120 to the table 200.

FIG. 4 is a front view of the pedestal side member 120 and related members. In particular, the upper protruding screw 155 and the lower protruding screw 156 are shown on top of each other as related members so that the relative positions with respect to the mortar hole 123 can be seen.

As shown in the figure, when these members are observed from the z-axis direction, the center line along the y-axis direction of the guide key 160 coincides with the center line along the y-axis direction of the opening circle formed by the mortar surface of the mortar hole 123. do. Further, the central axis of the upper protruding screw 155 along the z-axis direction and the central axis of the lower protruding screw 156 along the z-axis direction are located on the matching center line. With such an arrangement, when the upper protruding screw 155 or the lower protruding screw 156 presses the mortar surface of the mortar hole 123 as described later, the tool side member 110 is guided by the guide key 160 and smoothly moves in the y-axis direction. Displace.

FIG. 5 is a partial cross-sectional view of the pedestal side member 120 for explaining the adjustment in the height direction by the adjusting mechanism, and specifically, is a cross-sectional view taken along the line AA of FIG. In particular, FIG. 5A shows a state in which the upper protruding screw 155 protrudes toward the base member 120 from the lower protruding screw 156, and FIG. 5B shows a state in which the lower protruding screw 156 protrudes from the upper protruding screw 155. Also shows a state of protruding toward the base side member 120 side.

As shown in FIG. 5A, when the upper protruding screw 155 protrudes from the back surface of the tool side member 110 toward the base side member 120 by a predetermined amount and is larger than the protruding amount of the lower protruding screw 156, the upper protruding screw 155 The tip portion 155a of the mortar hole 123 comes into contact with the upper inclined surface 123a of the mortar hole 123. The operator engages the upper protruding screw 155 in the upper female screw hole 115 of the tool side member 110, and further, for example, turns a hexagon wrench to propel the inside of the upper female screw hole 115 toward the mortar hole 123. The tip portion 155a can be brought into contact with the upper inclined surface 123a. Further, when the hexagon wrench is turned to push out the upper protruding screw 155, the tip portion 155a presses the upper inclined surface 123a, and the pressing force causes the upper protruding screw 155 as a reaction from the upper inclined surface 123a, and eventually the tool side member 110. It acts as a pushing force. Due to this action, the tool side member 110 is displaced downward. At this time, the lower protruding screw 156 is retracted inside the lower female screw hole 116 so as not to hinder the downward displacement.

As shown in FIG. 5B, when the lower protruding screw 156 protrudes from the back surface of the tool side member 110 toward the base side member 120 by a predetermined amount and is larger than the protruding amount of the upper protruding screw 155, the lower protruding screw 156 The tip portion 156b of the mortar hole 123 comes into contact with the lower inclined surface 123b of the mortar hole 123. The operator engages the lower protruding screw 156 in the lower female screw hole 116 of the tool side member 110, and further, for example, turns a hexagon wrench to propel the lower female screw hole 116 toward the mortar hole 123. The tip portion 156b can be brought into contact with the lower inclined surface 123b. Further, when the lower protruding screw 156 is pushed out by turning the hexagon wrench, the tip portion 156b presses the lower inclined surface 123b, and the pressing force causes the lower protruding screw 156 as a reaction from the lower inclined surface 123b, and eventually the tool side member 110. It acts as a pushing force. Due to this action, the tool side member 110 is displaced upward. At this time, the upper protruding screw 155 is retracted inside the upper female screw hole 115 so as not to hinder the upward displacement.

In the present embodiment, such an adjustment mechanism adjusts the position of the tool-side member 110 with respect to the base-side member 120 in the y-axis direction within a range of 0.5 mm to the upper side and 0.5 mm to the lower side from the reference position. It can be carried out. That is, the height of the cutting blade can be finely adjusted within this range with the cutting tool 300 attached. The depth of the mortar hole 123, in other words, the lengths of the upper inclined surface 123a and the lower inclined surface 123b are determined according to the set adjustment allowance. After making the fine adjustment in this way, the operator tightens the loosened fixing screw 131 to firmly fix the tool side member 110 to the base side member 120.

The angle of each inclined surface is preferably in the range of 10 ° to 40 ° with respect to the z-axis direction from the viewpoint of conversion of the acting force in the vertical direction. Further, as shown in FIG. 5A, the inclination angle of the tip portion 155a of the upper protruding screw 155 is formed so as to match the inclination angle of the upper inclined surface 123a of the mortar hole 123, so that both of them are formed with each other. Make line contact. Similarly, as shown in FIG. 5 (B), the inclination angle of the tip portion 156b of the lower protruding screw 156 is formed so as to match the inclination angle of the lower inclined surface 123b of the mortar hole 123. Line contact with each other. By making line contact with each other in this way, the acting force can be efficiently converted in the vertical direction, but for example, each tip may be formed into a spherical surface or another curved surface.

FIG. 6 is a perspective view of the table side member 120 and the fixing tool for fixing the table side member 120 to the table 200. Among such fixtures, the slot bolt 190 inserted so as to pass through the through hole 124 provided in the vertical portion 120a is a hexagon socket head cap screw, and the T slot nut 170 is inserted by a general lead-in structure. Pull it to the upper surface of the T slot 210.

On the other hand, among the fixtures for fixing the table side member 120 to the table 200, the slot bolt 180 inserted into each of the two fitting holes 125 provided in the horizontal portion 120b is a T-slot nut due to the action of the fixing screw 141. The 170 is pulled to the upper surface of the T slot 210. The slot bolt 180 is composed of a body portion 181 and a male screw portion 182, and the body portion 181 is provided with a mortar hole 183 from the side surface direction. The slot bolt 180 is adjusted so that the mortar hole 183 faces the female screw hole 126 when the male screw portion 182 is engaged with the female screw hole 172 of the T slot nut 170 and the body portion 181 is inserted into the fitting hole 125. Will be done.

The operator inserts the body of the slot bolt 180 equipped with the T slot nut 170 into the fitting hole 125. Then, when the fixing screw 141, which is a set screw with a hexagonal hole, is engaged with the female screw hole 126 and the inside thereof is propelled toward the mortar hole 183, the tip portion 141a thereof protrudes into the fitting hole 125 and the mortar hole It comes into contact with the inclined surface 183a on the upper part of the 183. Further, when the fixing screw 141 is rotated and the tip portion 141a is pressed against the inclined surface 183a, the pressing force acts as a force for pushing up the slot bolt 180 toward the upper side. That is, it acts as a force for pulling the T-slot nut 170 to the upper surface of the T-slot 210.

Since the structure of such a fixative does not require a width in the x-axis direction as compared with a general retractable structure, even if two sets of fixtures are arranged along the x-axis direction as shown in the figure, the clamp is clamped. The width of the unit 100 in the x-axis direction can be reduced. If the width of the clamp unit 100 in the x-axis direction can be reduced, more clamp units 100 can be fixed to the table 200. Although the example in which the T slot nut 170 and the slot bolt 180 are separate bodies has been described here, they may be integrally formed.

Next, a second embodiment according to the present embodiment will be described. FIG. 7 is an exploded perspective view of the clamp unit 100'according to the second embodiment. The description of the structure similar to that of the clamp unit 100 according to the first embodiment will be omitted.

The clamp unit 100 according to the first embodiment has a structure in which the tool side member 110 has an upper female screw hole 115 and a lower female screw hole 116, and the base side member 120 has a mortar hole 123. However, since the adjusting mechanism may displace the tool side member 110 and the base side member 120 relatively in the y-axis direction, the arrangement of the female screw hole and the mortar hole may be reversed. In the clamp unit 100'according to the second embodiment, the arrangement of the female screw hole and the mortar hole is opposite to the arrangement in the clamp unit 100 according to the first embodiment.

That is, the mortar hole 118 is provided on the back surface side of the tool side member 110', and the upper female screw hole 128 and the lower female screw hole 129 are provided on the vertical portion of the base side member 120'. Then, the upper protruding screw 155 is meshed with the upper female screw hole 128, and the lower protruding screw 156 is meshed with the lower female screw hole 129. When the upper protruding screw 155 protrudes from the upper female screw hole 128 and its tip portion 155a presses the upper inclined surface 118a of the mortar hole 118, the tool side member 110'is pushed up along the y-axis direction. When the lower protruding screw 156 protrudes from the lower female screw hole 129 and its tip portion 156b presses the lower inclined surface 118b of the mortar hole 118, the tool side member 110'is pushed down along the y-axis direction. Therefore, even with such a structure, the tool-side member 110'is displaced in the y-axis direction with respect to the table-side member 120', and the height of the cutting blade is increased, as in the adjustment mechanism according to the first embodiment. Can be fine-tuned.

Further, a third embodiment according to the present embodiment will be described. FIG. 8 is an exploded perspective view of the clamp unit 100 according to the third embodiment. The description of the same structure as the clamp unit 100 according to the first embodiment will be omitted.

The clamp unit 100 according to the first embodiment has an upper inclined surface 123a pressed by the upper protruding screw 155 and a lower inclined surface 123b pressed by the lower protruding screw 156 as a part of the side surface of the mortar hole 123, that is, one. Formed as part of the mortar surface. The mortar-shaped hole is relatively easy to machine, which is convenient in that it saves time and effort compared to processing the upper inclined surface and the lower inclined surface separately. However, the upper inclined surface and the lower inclined surface are not limited to the case where they are formed as a part of the mortar surface. The clamp unit 100 "according to the third embodiment is different from the clamp unit 100 according to the first embodiment in that a cross groove 123" is provided in the table side member 120 "instead of the mortar hole 123. In the clamp unit 100 ”, the tool side member 110, the upper protruding screw 155, and the lower protruding screw 156 are the same as the clamp unit 100.

The crossing groove 123 "provided in the pedestal side member 120" is one concave groove penetrating in the x-axis direction, and its cross section has a trapezoidal shape. That is, the crossing groove 123 "has an upper inclined surface 123" a which is a plane whose normal is diagonally downward and a lower inclined surface 123 "b which is a plane whose normal is diagonally upward. When the tip portion 155a protrudes from the upper female screw hole 115 and presses the upper inclined surface 123 "a of the cross groove 123", the tool side member 110 is pushed down along the y-axis direction. The lower protruding screw 156 is a lower female screw. When the tip portion 156b protruding from the hole 116 presses the lower inclined surface 123 "b of the transverse groove 123", the tool side member 110 is pushed up along the y-axis direction. Therefore, even with such a structure, the tool side member 110 is pushed up. Similar to the adjustment mechanism according to the first embodiment, the tool side member 110 can be displaced with respect to the base side member 120 "in the y-axis direction, and the height of the cutting blade can be finely adjusted.

In addition, since each inclined surface is formed on a flat surface, even if the tip of the protruding screw deviates slightly from the planned contact position, each pressing force is efficiently converted into a force acting in the y-axis direction. To. From this point of view, not only when each inclined surface is a plane, but also a curved surface which is a set of line segments parallel to the x-axis direction may be used. Further, from the viewpoint of processing, the transverse groove 123 "is formed as one concave groove penetrating in the x-axis direction, but may be formed as a concave portion that does not penetrate, and the concave portion and the lower portion for forming the upper inclined surface 123" a. The recesses for forming the inclined surface 123 "b may be formed separately.

Although the present embodiment has been described above through the three examples, it goes without saying that there are various other variations. In each of the above-described embodiments, a set screw with a hexagonal hole is used as the projecting member of the adjusting mechanism, but the projecting member is not limited to this and may be any member that can press the inclined surface. Further, in each of the above-described embodiments, many screws are used as the fixing tool, but the fixing tool is not limited to this, and other members may be adopted.

100, 100', 100 "... Clamp unit, 110, 110' ... Tool side member, 110a ... Thin plate part, 110b ... Block part, 111 ... Mounting hole, 112 ... Through hole, 113 ... Through hole, 115 ... Upper female screw Hole, 116 ... Lower female screw hole, 117 ... Guide groove, 118 ... Grinding pot hole, 118a ... Upper inclined surface, 118b ... Lower inclined surface, 120, 120', 120 "... Base side member, 120a ... Vertical part, 120b ... Horizontal part, 121 ... female screw hole, 122 ... coolant hole, 123 ... mortar hole, 123a ... upper inclined surface, 123b ... lower inclined surface, 123 "... cross groove, 123" a ... upper inclined surface, 123 "b ... lower part Inclined surface, 124 ... through hole, 125 ... fitting hole, 126 ... female screw hole, 127 ... guide rib, 128 ... upper female screw hole, 129 ... lower female screw hole, 130 ... rubber ring, 131 ... fixing screw, 141 ... Fixing screw, 141a ... Tip, 151 ... Mounting screw, 155 ... Upper protruding screw, 155a ... Tip, 156 ... Lower protruding screw, 156b ... Tip, 160 ... Guide key, 161 ... Fixing screw, 170 ... T slot nut , 172 ... female screw hole, 180 ... slot bolt, 181 ... body, 182 ... male screw, 183 ... mortar hole, 183a ... inclined surface, 190 ... slot bolt, 200 ... table, 210 ... T slot, 300 ... cutting tool

Claims (8)

A cutting tool clamp unit used by being fixed to a table that can move in a plane direction defined by a first axial direction and a second axial direction orthogonal to the first axial direction.
The first member fixed to the table and
A second member that supports the cutting tool and is fixed to the first member,
A first fixture for fixing the first member to the table, and
A second fixture for fixing the second member to the first member, and
With the second fixture loosened, an adjusting mechanism for adjusting the position of the second member with respect to the first member in the third axial direction orthogonal to the first axial direction and the second axial direction is provided. Prepare,
The adjustment mechanism is
A first inclined surface and a second inclined surface provided on one of the first member and the second member,
It has a first protruding member and a second protruding member protruding from the other of the first member and the second member.
When the first inclined surface is pressed against the tip end portion of the first protruding member, the second member is displaced to one side in the third axial direction with respect to the first member, and the second inclined surface becomes the said. A clamp unit in which the second member is displaced to the other side in the third axial direction with respect to the first member when pressed against the tip of the second protruding member. The first protruding member is screwed into a first female screw hole provided in the other of the first member and the second member, and a tip portion thereof protrudes from the opening of the first female screw hole. It is a 1 male screw member, and the second protruding member is screwed into a second female screw hole provided in the other of the first member and the second member, and the tip portion thereof is the second female screw. The clamp unit according to claim 1, which is a second male screw member protruding from the opening of the hole. The clamp unit according to claim 1 or 2, wherein the first inclined surface and the second inclined surface are formed as a part of one mortar surface on one of the first member and the second member. A guide key for guiding the second member with respect to the first member along the third axial direction is provided.
The clamp unit according to claim 3, wherein the center line of the guide key along the third axis direction coincides with the center line of the opening circle of the mortar surface along the third axis direction. The clamp unit according to claim 3 or 4, wherein the tip end portion of the first protruding member has an inclined surface matching the inclination angle of the mortar surface. The first inclined surface and the second inclined surface are formed on one of the first member and the second member as a curved surface or a plane which is a set of line segments parallel to the second axial direction. The clamp unit according to claim 1 or 2. A claim that the first inclined surface and the second inclined surface are formed as a part of one concave groove penetrating in the second axial direction in the one of the first member and the second member. 6. The clamp unit according to 6. The first fixture is
A T-slot nut inserted into the T-slot parallel to the second axis direction provided on the table, and a T-slot nut.
A shaft member extending from the T-slot nut in the third axial direction and fitting with a fitting hole provided in the first member, and a shaft member.
A pressing member which is inserted into a side hole communicating with the side surface of the fitting hole and whose tip portion protrudes into the fitting hole to press an inclined surface provided on the shaft member.
One of claims 1 to 7, wherein the tip portion of the pressing member presses the inclined surface so that the T slot nut is pulled in the direction of the first member and the first member is fixed to the table. Clamp unit as described in the section.

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