JP2009291910A - Structure for fixing two members, and tool holder of machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a positioning and fixing without biting and sticking. <P>SOLUTION: A block (A) has a recessed groove and protrusions provided on both sides of the recessed groove formed on the block (A), and a body part. A block (B) has on its underside a recessed groove that has a thickness identical to the width of the recessed groove of the block (A) and a width larger than the thickness of the recessed groove of the block (A). The recessed groove of the block (B) is fitted to the recessed groove of the block (A) by engagement with both the protrusions of the block (A). The block (B) further has protrusions provided on both sides of the recessed groove and a body part. A tapered surface is provided at one edge in contact with the bottom surface of the recessed groove in the body part of the block (B) and at the other edge in contact with the inner side surface of the recessed groove in the protrusion in the block (A). The tapered surfaces are provided so that, in such a state that the recessed groove of the block (B) engages with the protruded groove of the block (A) and the side surface on the other side of the body part of the block (B) is abutted against one side where the side surface on the other side of the body part of the block (B) is in contact with the inner side surface of the protrusion on the other side of the block (A) and the tapered surface of the block (A), the tapered surface becomes a flank face for permitting the rotation of the block (B) with the one side as a rotational axis. The tapered surfaces satisfy a relationship of H1>H-H2 or H2>H-H1 wherein H1 represents the height of the tapered surface in the depth direction of the recessed groove in the block (A); H2 represents the height of the tapered surface in the depth direction of the recessed groove in the block (B); and H represents the depth of the recessed groove in the block (A). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a two-member fixing structure and a tool holder of a machine tool.

In general, a fitting between a convex part and a concave part or a hole and a pin is used for positioning the two members, and a bolt is used for fixing and connecting the two members.
For example, in a turret lathe suitable for low-volume, multi-product production, a plurality of tool rests are provided on the turret, and a tool holder is fixed to the tool rest. Since the tool holder is formed exclusively for each tool, when processing a workpiece, the processing order (processing procedure) is first determined based on the processing content (processing type) of the workpiece. The order of the tool holders attached to the tool post is determined according to the order. Since the number of tool rests is generally 6 to 12, 6 to 12 kinds of tool holders can be attached to the turret. Since various tools can be attached to the turret lathe in this way, there is usually no shortage of tools necessary for machining, but other tools are required depending on the machining content of the workpiece, Tool holder replacement may be required. For this reason, in order to cope with complicated tool holder replacement even in a turret lathe, a concave portion and a convex portion are provided for positioning the tool post and the tool holder, and the tool holder is fixed to the tool post with bolts. .

  However, when positioning is performed by fitting the concave portion and the convex portion, there is a problem that if the other side is slightly tilted with respect to one side, galling occurs and it takes time to release. In particular, in the case of a turret lathe, since the tool holder is heavy and difficult to handle, it is easy to cause galling, which may hinder production efficiency. In the case of a turret lathe, the tool post is provided with a screw hole for attaching the tool holder to the tool post and an insertion hole for inserting the rotating part of the tool mounted on the tool holder into the tool post. Therefore, when the tool holder is replaced, the chips adhering to the tool, the tool post, the cover of the turret lathe, etc. enter the inside of the turret, causing a problem in the internal device. .

  An object of the present invention is to enable positioning and fixing in a state where there is no biting or squeezing in a two-member fixing structure that is fitted to each other and fixed to each other by bolts.

1st invention is equipped with the base member fixed to a to-be-attached part, and the to-be-fixed member fixed to this base member, The said base member is provided with the rectangular parallelepiped block A, and the block A is block A A concave groove formed in the thickness direction of the block A, a convex portion formed on both sides of the concave groove by the formation of the concave groove, and a body portion, and the fixed member is a rectangular parallelepiped block B, and the block B has the same thickness as the groove of the block A and a width larger than the thickness of the groove, and is formed on the lower surface of the block B in the thickness direction of the block A. A concave groove that engages with the convex portion and fits perpendicularly to the concave groove of the block A; a convex portion formed on both sides of the concave groove by the formation of the concave groove; and a body portion; One end of the body portion of the body portion that contacts the bottom surface of the groove and the other surface of the convex portion of the block A that contacts the inner surface of the groove. Tapered surfaces are formed on the respective end edges, and these tapered surfaces are formed on the other side of the block B body where the concave groove of the block B is engaged with the concave groove of the block A. Allowing rotation of the block B around the one side as a rotation axis in a state where the side surface is in contact with one side where the inner side surface of the convex portion on the other side where the tapered surface of the block A is formed and the tapered surface of the block A is in contact The depth of the concave groove of the block B is determined to be different from the depth of the concave groove of the block A, and the block A and the block B
The heights H1 and H2 of the taper surfaces in the direction of the depth of the grooves satisfy the relations of H>H1> H / 2 and H>H2> H / 2, where the depth of the grooves in the block A is H. The both-side surfaces of the body portion of the block B in the thickness direction of the block B are constrained on both inner side surfaces in the width direction of both convex portions of the block A, and the member to be fixed in the thickness direction of the body portion of the block A Provided is a two-member fixing structure in which both inner surfaces in the width direction of both convex portions of the block B are fixed to the attached portion by a fixture in a fitted state between the concave grooves, which are constrained on both surfaces at both end surfaces. To do.
With such a structure, biting when the two members are fitted is prevented. Further, in the state where the block A and the block B have been fitted, the block A and the block B are in a four-sided restrained support state, so that the load applied to the bolt can be reduced. Further, positioning and fixing of the fixed member can be completed in a short time.

2nd invention is equipped with the base member fixed to a to-be-attached part, and the to-be-fixed member fixed to this base member, The said base member is provided with the rectangular parallelepiped block A, and the block A is block A A concave groove formed in the thickness direction of the block A, a convex portion formed on both sides of the concave groove by the formation of the concave groove, and a body portion, and the fixed member is a rectangular parallelepiped block B, and the block B has the same thickness as the groove of the block A and a width larger than the thickness of the groove, and is formed on the lower surface of the block B in the thickness direction of the block A. A concave groove that engages with the convex portion and fits perpendicularly to the concave groove of the block A; a convex portion formed on both sides of the concave groove by the formation of the concave groove; and a body portion; One end of the body portion of the body portion that contacts the bottom surface of the groove and the other surface of the convex portion of the block A that contacts the inner surface of the groove Tapered surfaces are formed on the respective end edges, and these tapered surfaces are formed on the other side of the block B body where the concave groove of the block B is engaged with the concave groove of the block A. Allowing rotation of the block B around the one side as a rotation axis in a state where the side surface is in contact with one side where the inner side surface of the convex portion on the other side where the tapered surface of the block A is formed and the tapered surface of the block A is in contact The heights H1 and H2 of the tapered surfaces of the block A and the block B in the depth direction of the groove are H, where the depth of the groove of the block A is H, and H1> H−H2, H2 ≦ H / 2 or H2> H−H1 and H1 ≦ H / 2 are satisfied, and the fixed member is formed by block B on both inner side surfaces in the width direction of both convex portions of block A. While the two end faces of the body in the thickness direction are restricted The both ends of the body portion of the block A in the thickness direction are fixed to the attachment portion in a fitted state between the concave grooves in which both the inner surfaces in the width direction of the both convex portions of the block B are constrained by a fixture. The two-member fixing structure is provided.
With such a structure, biting when the two members are fitted is prevented. In addition, in a state where the block A and the block B have been fitted, the block A and the block B are in a four-surface constrained state, so that the load applied to the bolt can be reduced. Further, positioning and fixing of the fixed member can be completed in a short time.
Further, the holder base is fixed to the tool post of the machine tool and the tool holder is attached and detached, so that chips do not enter the machine. Thereby, the malfunction of the machine tool resulting from the penetration | invasion of a chip can be prevented.

According to a third invention, in the first and second inventions, a taper surface is further provided on one edge contacting the bottom surface of the groove A of the block A and on the other edge contacting the inner surface of the groove of the block B. These tapered surfaces are formed such that the concave groove of the block B is engaged with the concave groove of the block A, and the other side surface of the body portion of the block A where the tapered surface is not formed is the tapered surface of the block B. Is formed so as to be a flank that allows rotation of the block B with the one side as a rotation axis in contact with the one side where the inner surface of the convex portion on the other side formed with the taper surface of the block B contacts. The two-member fixing structure is provided.
With such a structure, positioning and fixing of the fixed member can be completed in a shorter time.

4th invention is equipped with the holder base fixed to the tool rest of a machine tool, and the tool holder fixed to this holder base, The said holder base is provided with the rectangular parallelepiped block A, and the block A is a block. A concave groove formed in the thickness direction of the block A on the upper surface of A, and convex portions and body portions formed on both sides of the concave groove by the formation of the concave groove, the tool holder being a rectangular parallelepiped block B The block B has the same thickness as the width of the concave groove of the block A and a width larger than the thickness of the concave groove, and the block B is formed on the lower surface of the block B in the thickness direction of the block. A concave groove that engages with both the convex portions of the block A and fits perpendicularly to the concave groove of the block A, a convex portion formed on both sides of the concave groove by the formation of the concave groove, and a trunk portion. One end edge in contact with the bottom of the groove of the body of block B and block A A taper surface is formed on each of the other end edges of the convex portion that are in contact with the inner surface of the concave groove. These tapered surfaces are formed by engaging the concave groove of the block B with the concave groove of the block A, and In a state where the other side surface where the tapered surface is not formed is in contact with one side where the inner surface of the convex portion on the other side where the tapered surface of the block A is formed and the tapered surface of the block A is in contact It is formed so as to be a flank that allows rotation of the block B with one side as a rotation axis, and the depth of the concave groove of the block B is determined to be different from the depth of the concave groove of the block A. The heights H1 and H2 of the taper surface in the direction of the depth of the concave groove B satisfy the relationship of H>H1> H / 2 and H>H2> H / 2, where the depth of the concave groove of the block A is H. The tool holder is fixed to both blocks A. Both end surfaces of the body portion in the thickness direction of the block B are constrained on both inner side surfaces in the width direction of the block portion, and both width directions of both convex portions of the block B on both end surfaces in the thickness direction of the body portion of the block A The present invention provides a tool holder for a machine tool that is fixed to the holder base with a fixture in a state in which the concave grooves whose inner side surfaces are constrained on two sides are provided.
With such a structure, positioning and fixing of the fixed member can be completed in a shorter time. Further, the holder base is fixed to the tool post of the machine tool and the tool holder is attached and detached, so that chips do not enter the machine. Thereby, the malfunction of the machine tool resulting from the penetration | invasion of a chip can be prevented.

5th invention is equipped with the holder base fixed to the tool rest of a machine tool, and the tool holder fixed to this holder base, The said holder base is provided with the rectangular parallelepiped block A, and the block A is a block. A concave groove formed in the thickness direction of the block A on the upper surface of A, and convex portions and body portions formed on both sides of the concave groove by the formation of the concave groove, the tool holder being a rectangular parallelepiped block B The block B has the same thickness as the width of the concave groove of the block A and a width larger than the thickness of the concave groove, and the block B is formed on the lower surface of the block B in the thickness direction of the block. A concave groove that engages with both the convex portions of the block A and fits perpendicularly to the concave groove of the block A, a convex portion formed on both sides of the concave groove by the formation of the concave groove, and a trunk portion. One end edge in contact with the bottom of the groove of the body of block B and block A A taper surface is formed on each of the other end edges of the convex portion that are in contact with the inner surface of the concave groove. These tapered surfaces are formed by engaging the concave groove of the block B with the concave groove of the block A, and In a state where the other side surface where the tapered surface is not formed is in contact with one side where the inner surface of the convex portion on the other side where the tapered surface of the block A is formed and the tapered surface of the block A is in contact The heights H1 and H2 of the tapered surfaces of the block A and the block B in the depth direction of the groove are defined as the depth of the groove of the block A. Where H1> H−H2 and H2 ≦ H / 2 or H2> H−H1 and H1 ≦ H / 2. In the thickness direction of the block B on both inner side surfaces in the width direction The both end surfaces of the block are constrained to two surfaces, and the concave grooves are fitted to each other in which both inner surfaces in the width direction of both convex portions of the block B are constrained on both surfaces in the thickness direction of the body portion of the block A A tool holder for a machine tool that is fixed to the holder base by a fixture.
With such a structure, positioning and fixing of the fixed member can be completed in a shorter time. Further, the holder base is fixed to the tool post of the machine tool and the tool holder is attached and detached, so that chips do not enter the machine. Thereby, the malfunction of the machine tool resulting from the penetration | invasion of a chip can be prevented.

According to a sixth aspect of the present invention, in the fourth and fifth aspects of the present invention, a taper surface is further provided on one end edge in contact with the bottom surface of the groove A of the block A and on the other end edge in contact with the inner surface of the groove of the block B. These tapered surfaces are formed such that the concave groove of the block B is engaged with the concave groove of the block A, and the other side surface of the body portion of the block A where the tapered surface is not formed is the tapered surface of the block B. Is formed so as to be a flank that allows rotation of the block B with the one side as a rotation axis in contact with the one side where the inner surface of the convex portion on the other side formed with the taper surface of the block B contacts. A tool holder for a machine tool is provided.
With such a structure, positioning and fixing of the fixed member can be completed in a shorter time.

  According to the present invention, it is possible to prevent biting and squeezing when fitting the concave groove of the block B of the fixed member into the concave groove of the block of the base member. Further, when the concave groove of the block B is fitted into the concave groove of the block A, the block A and the block B are mutually restrained on four sides, so that the positioning accuracy is improved. Thereby, the position alignment at the time of fixing a to-be-fixed member to a base member becomes unnecessary, and the working time at the time of fixing with a volt | bolt can be reduced significantly.

  Hereinafter, an embodiment in which the positioning and fixing structure between two members according to the present invention is applied to a tool holder of a turret lathe will be described.

<First Embodiment>
FIG. 1 is an explanatory view showing a turret and a tool holder of a turret lathe according to an embodiment of the present invention, and FIG. 2 is an ab-c-d cut surface and an ef-g-h cut surface of FIG. It is sectional drawing of the tool holder corresponding to.

  The turret 1 is rotatably supported by a support shaft (not shown), and is rotated to an index position by an index motor. A plurality of tool rests 2 as fixed parts are attached to the turret 1, and a tool holder 3 is attached to each tool rest 2.

The tool holder 3 includes a holder base 3a as a base member fixed to the tool post 2 and a tool holder 3b as a fixed member fixed to the holder base 3a by a fixing tool, for example, a bolt (not shown). Is done.
The holder base 3a is fixed to the tool post 2 with a high axial force bolt such as a hexagon socket head bolt.

The holder base 3a and the tool holder 3b are formed so as to have a weight equivalent to, for example, a conventional tool holder when they are connected to each other.
Thereby, the tool holder 3b is significantly reduced in weight as compared with the conventional tool holder, and can be handled easily such as attachment to and removal from the tool post 2.

As shown in FIG. 1, the holder base 3a includes a rectangular parallelepiped block A at the upper portion, and the tool holder 3b includes a rectangular parallelepiped block B at the lower portion.
In the block A, a concave groove 5 is formed on the upper surface of the block A along the thickness direction of the block A. The block B has the same thickness as the width of the concave groove 5 of the block A and a width larger than the thickness of the concave groove 5, and the concave groove 8 along the thickness direction of the block B is formed on the lower surface of the block B. .
The block A is formed with convex portions 6 and 6 on both sides of the concave groove 5 due to the formation of the concave grooves 5, and is formed with a body portion 7 that connects the convex portions 6 and 6 to each other. By forming the concave groove 8, convex portions 9 and 9 are formed on both sides of the concave groove 8, and a body portion 10 that connects the convex portions 9 and 9 is formed. Each groove | channel 5 and 8 is extended linearly, and is opened to the side in the both ends of the thickness direction of the block A and the block B, respectively. Moreover, each groove | channel 5 and 8 is formed in a cross-sectional rectangular shape.

The depths H and H ′ of the groove 5 of the block A and the groove 8 of the block B may be the same depth H = H ′ or different depths H ≠ H ′. The height (thickness) of the body part 7 of the block A and the height (thickness) of the body part 10 of the block B may be the same or different.
A tool mounting portion 14 for mounting a cutting tool (hereinafter also referred to as a tool) 4 is provided on the side surface of the tool holder 3b. The cutting tool 4 such as a cutting tool or a throw-away tip is inserted into the tool mounting portion 14 and then fixed to the tool holder 3b by screwing. In addition, the tool attachment part 14 respond | corresponds to the shape for every tool.

The block A of the holder base 3a and the block B of the tool holder 3b are provided with tapered surfaces 11A and 11B different from chamfering to prevent biting and squeezing.
The tapered surfaces 11A and 11B are the widths of one end k of the body portion 10 in contact with the groove bottom surface of the groove groove end of the block B of the tool holder 3b and the protrusion 6 of the groove groove opening of the block A of the holder base 3a. The other edge l in contact with the inner surface in the direction, or the other edge j of the body 10 in contact with the groove bottom surface of the groove B end of the block B of the tool holder 3b and the groove opening of the block A of the holder base 3a. It is provided at one end edge m in contact with the inner surface in the width direction of the convex portion 6 of the portion.
Hereinafter, in order to facilitate understanding, one end k of the body portion 10 in contact with the groove bottom surface of the groove groove end portion of the block B and the inner surface in the width direction of the protrusion portion 6 of the groove groove opening portion of the block A are in contact. The case where the taper surfaces 11A and 11B are provided on the other edge l will be described.
The taper surface 11B of the block B extends from one end of one end k to the other end along one end edge k, and the other end l of the other taper surface 11 also extends along the other end l. Extends from one end to the other.
The heights H1 and H2 of the taper surfaces 11A and 11B in the depth direction of the groove are defined as H (the depth of the groove 5 of the block A and the groove 8 of the block B). The depths may be the same or different from each other), and are defined so as to satisfy H1> H-H2 or H2> H-H1.
This is to satisfy the following conditions.
(A) This is a condition for allowing the block B to be supported on two surfaces in a state where the fitting between the block A and the block B is completed.
(B) The area of each support surface should be as large as possible. This is a condition for improving the reliability in (A).
(C) The block B can be rotated around the horizontal axis in a state where the block B is fitted in the groove A of the block A, and the groove B of the block B is changed to the groove A of the block A by utilizing the rotation of the block B around the horizontal axis. 5 so that it can be fitted without biting or biting. This is a condition for enabling precise positioning and improving workability.

In order to satisfy such conditions (A), (B), and (C), each part of the blocks A and B may be determined as follows.
<General decision>
The groove depth H of the block A is not related to the depth of the groove of the block B. If the heights of the tapered surfaces of the blocks A and B are H1 and H2, H1> H-H2 or H2> H-H1. It is determined to satisfy the relationship. This will be described below.
FIG. 4 shows how the block B rotates around the horizontal axis in the concave groove 5 of the block A. FIG. Here, the rotation around the horizontal axis is the fitting (attachment) to the block A when the direction is clockwise, and the release from the block A when the direction is counterclockwise.
The tapered surfaces 11 </ b> A and 11 </ b> B are formed at the other end l of the convex portion 6 on the other side of the block A and an end edge k on the one side of the body portion 10 of the block B.
In the state indicated by the solid line in which the block B is fitted in the concave groove 5 of the block A, the contact point where the tapered surface 11A of the block A contacts the side surface of the body portion 10 on the other side of the block B is a, and the other side of the tapered surface 11A The point formed by connecting the point a and the point f is af. The contact point where the taper surface 11B of the block B is in contact with the inner surface of the convex portion 6 on one side of the block A is d, the other point of the taper surface 11B is e, and the point d and the point e are connected. Let de be the edge. Further, the depth of the groove 5 of the block A is H, the height of the taper surface 11A of the block A in the depth direction of the groove is H1, and the height of the taper surface 11B of the block B in the depth direction of the groove is H2. To do.
In order to rotate the block B around the horizontal axis around the contact point a with the block B fitted to the block A, the rotation locus 20 having the contact point d of the block B as the radius r1 connecting the contact points a and d. Need to be rotated along. For this purpose, the height of the contact point d of the block B from the bottom surface of the concave groove 8 (height H2 of the tapered surface 11B) is equal to or higher than the height of the position of the contact point a of the block A corresponding to the contact point d. Must be in position (> H-H1). When the contact point d of the block B is at a position lower than the corresponding contact point a, for example, as shown by d ′ (H2> H2 ′), the body portion 10 of the block B formed by connecting the contact points dd ′. This is because a part of the side surface on one side is locked to the inner side surface of the convex portion 6 on one side of the block A and does not rotate.
Therefore, in order for the block B to rotate with the block A fitted to the block A, the height conditions of the taper surfaces 11A and 11B of the block A and the block B must be determined so as to satisfy the relationship of H2> H−H1. I must. This can also be said for the opposite state where block A is fitted to block B, or must be defined to satisfy the relationship H1> H-H2.
Thus, if the height of each taper surface is defined, the taper surfaces 11A and 11B without the galling can be formed in the block A and the block B.

  Thus, the taper surface 11B is formed on the block B along the side de, the taper surface 11A is formed on the block A along the side af, and the block B is rotated around the contact point a. Then, the fitting of the blocks A and B satisfying the conditions (A), (B) and (C) is obtained. In this case, the taper surface 11A of the block A escapes, and the taper surface 11B of the block B also escapes. The taper surface 11A of the block A may have a clearance angle θ that allows the block B to rotate. The tapered surface 11B of the block B only needs to be inside the rotation locus 20 of the point d of the block B. Both tapered surfaces do not need to be flat and may be formed by curved surfaces or may be formed by notches.

  According to the above-described embodiment, the general determination condition of the tapered surface height is H1> H-H2 or H2> H-H1, but from the viewpoint of the fitting strength and the fitting property, In addition, the following specific decisions should be made.

<Specific decision>
(1) H1> H-H2 and H1> H / 2, H2> H / 2,
Alternatively, H2> H−H1, H2> H / 2, and H1> H / 2.
Actually, manufacturing tolerances and adhesion of dust can be considered. Therefore, when manufacturing is performed with negative tolerances, there is a risk of galling or entrapment if dust adheres, as shown in FIG. Thus, a sufficient margin can be obtained only by slightly shifting the contacts a and d upward from H / 2 (for example, 0.5 mm).
Therefore, the lower limit values of the heights H1 and H2 of the tapered surfaces 11A and 11B of the block A and the block B are preferably H1> H / 2 and H2> H / 2 in order to correspond to the tolerance. Further, the upper limits of the heights H1 and H2 of the tapered surfaces 11A and 11B of the blocks A and B are preferably H> H1 and H> H2 in order to satisfy (A).
When the heights H1 and H2 of the tapered surfaces 11A and 11B of the blocks A and B are smaller than H / 2, it becomes difficult to fit. For example, the omission may be worse or it may not be filled depending on the angle. If it is larger than H / 2, the fitting becomes easy. However, if the degree of H / 2 or more becomes too large, the contact area between the concave groove of the block A and the side surface of the body part of the block B, which are closely related to the fitting strength, is not preferable. The height of each of the tapered surfaces 11A and 11B is preferably larger than H / 2 from the viewpoints of strength and fitting.
In this case, the depth H of the groove 5 of the block A may be set to the same depth as the depth of the groove 8 of the block B, or may be set to a different depth. Further, the dimensions of the tapered surfaces 11A and 11B may be set equal or different.

(2) H1> H−H2 and 0 <H2 ≦ H / 2,
Alternatively, H2> H−H1 and 0 <H1 ≦ H / 2.
In consideration of the direction of the load, it is not necessary to equalize the dimensions of the tapered surfaces 11A and 11B in order to satisfy (A) and (B). Therefore, the groove depth of the tapered surfaces 11A and 11B on the load receiving side is not required. The depth of the taper surfaces 11B and 11A in the depth direction of the groove on the side where the depth in the vertical direction is shallow and does not receive much load may be increased. For example, assuming that the depth in the groove depth direction of the taper surface 11A on the high load side is H / 3 and the depth of the taper surface 11B in the groove groove depth direction on the low load side is 2H / 3, The support area may be increased.
Also in this case, the depth of the groove 5 of the block A may be set to the same depth as the depth of the groove 8 of the block B, or may be set to a different depth.

  When specific numerical values are entered in each block A and block B, for example, the taper angle 11A of the tapered surface 11A = 13.5 °, the width L of the body 10 in the width direction of the block B = 85 (mm), and H = 10 (Mm), assuming that the maximum radius r1 = 85.16 when the block B is rotated around the horizontal axis around the contact point a, the height of the tapered surfaces 11A and 11B is H1 = H2 = 5.02 (mm). is there.

<Example of fixing method by rotation>
Next, referring to FIGS. 1, 4, and 5, the contact a between the inner side surface of the convex portion 6 on the other side of the block A and the other side surface of the body portion 10 of the block B is rotated about the horizontal axis. An example of a fixing method for attaching the tool holder 3b to the holder base 3a as a shaft will be described. The holder base 3a is fixed to the tool post 2 with bolts.

First, hold the block B with both hands and check the positions of the taper surfaces 11A and 11B of the block A and the block B (FIG. 5A). The block B is arranged above the block A so that the taper surface 11B of the block B is arranged on the opposite side (FIGS. 1 and 5A).
Next, the block B is tilted so that the other side body portion 10 where the taper surface 11B of the block B is not formed is lower and the one side body portion 10 where the taper surface 11B is formed is upper. In this state, the inner side surfaces of both convex portions 9, 9 of the block B are arranged on the same plane as the both side surfaces of the body portion 7 of the block A, and the block B is moved to the block A side. Both inner side surfaces of the convex portions 9 are engaged with both side surfaces of the body portion 7 of the block A (FIG. 5B). When both inner side surfaces of both convex portions 9 and 9 of the block B are engaged with both side surfaces of the body portion 7 of the block A, the block B is in a two-surface constrained state with respect to the block A.

Subsequently, the block B is moved to the other convex portion 6 side on which the tapered surface 11A of the block A is formed with the both side surfaces of the body portion 7 of the block A as guide surfaces while being in a two-surface constrained state. The other side surface of the body portion 10 where the tapered surface 11B is not formed is brought into contact with one side where the inner surface of the convex portion 6 on the other side of the block A and the tapered surface 11 are in contact (FIGS. 4 and 5). c))).
In this state, the lower end of the lower surface of the body part on the other side of the block B is supported by the bottom surface of the groove on the block A, so that the inner surface of the convex part 6 on the other side of the block A and the tapered surface 11A are around one side. Block B can be rotated. At this time, the taper surface 11 </ b> A of the block A becomes a relief for making the block B tilted.

Since the taper surface 11B is formed on the edge k on one side of the body portion 10 of the block B, the side surface of the body portion 10 on one side of the block B is blocked even if the block B is rotated to the engagement side. There is no contact with the inner surface of the convex portion 6 on one side of A.
Thereby, the trunk | drum 10 of the block B fits in the groove | channel 5 of the block A without being squeezed in the state of two-surface restraint (FIG.5 (d)). In this way, the method of fitting the block B while rotating it is called a swing fitting method.
When the fitting of the block B is completed, the block B is positioned on the block A in a four-surface constrained state.
Since the clearance between the block A and the block B is in the range of 1/100 to 3/100, the block B is precisely positioned on the block A within the clearance.

  When the positioning is completed, the bolt insertion hole 12 (see FIG. 1) of the tool holder 3b is accurately positioned with respect to the screw hole 13 (see FIG. 1) of the holder base 3a. The tool holder 3b can be fixed to the holder base 3a only by screwing (not shown) into the screw hole 13. Therefore, it can contribute to shortening of working time.

  In addition, what is necessary is just to reverse the procedure at the time of engagement when removing the tool holder 3b from the holder base 3a. Thereby, the tool holder 3b can be removed from the holder base 3a without causing galling.

As described above, in the two-member fitting fixing structure according to the present embodiment, the block B is not constrained on a four-sided basis from the start to the end of engagement, but is in a four-sided constrained state after the two-sided constraining. Therefore, the workability when positioning the tool holder 3b can be dramatically improved. Further, since no biting or galling occurs, the working time can be greatly shortened, and it is possible to sufficiently cope with the complicated request for replacement of the tool holder 3b.
Further, even if the height H1 of the tapered surface 11A in the depth direction of the groove exceeds 1/2 of the depth H of the groove 5 of the block A, the block B is supported on two surfaces, so the bolt is excessive. No heavy load is applied. Thereby, it is not necessary to change the size of the bolt, the bolt insertion hole 12, and the screw hole 13. Further, if the height H1 of the tapered surfaces 11A and 11B in the depth direction of the concave groove exceeds 1/2 of the depth H of the concave groove 5 of the block A, the contact area between the block A and the block B is as follows. Since each is maximized, the reliability is greatly improved.

<Other examples of fixing methods by rotation>
In an example of the fixing method, the block B is placed with the body 10 on the other side where the taper surface 11B of the block B is not formed facing the convex portion 6 on the other side where the taper surface 11A of the block A is formed. Although the case where it fits while rotating was demonstrated, the trunk | drum of the one side by which the taper surface 11B of the block B is formed in the convex part 6 of the one side in which the taper surface 11A of the block A is not formed You may make it fit, turning 10 and rotating the block B.

  That is, the block arrangement is opposite to that shown in FIG. 5, the taper surface 11A is formed not on the other side of the block A but on the convex portion on one side, and the taper surface 11B has a concave groove on the block B. It is formed in the body part of the other side which can be seen. The other example of this fixing method is different from the example of the fixing method shown in FIG. 5 in that in the example of the fixing method, the block B is swung like a groove 5 of the block A. In another example of this fixing method, the block B is swung in such a manner that it is dropped into the concave groove 5 of the block A so as to draw a parabola.

<Fixing method by dropping>
Next, another method for fixing the tool holder 3b using the rotation of the block B around the horizontal axis will be described with reference to FIG. In this method, the block B is rotated by dropping using the tapered surface 11 of the block B, the groove 8 of the block B is positioned in the groove 5 of the block A, and then the tool holder 3b is attached to the holder base 3a with a bolt. Fix it. The holder base 3a is fixed to the tool post 2 with bolts. In the tool holder, the depth of the groove 5 of the block A and the depth of the groove 8 of the block B are the same, and the taper surface is simply the taper surface 11 without distinguishing on the sign.

  First, as a preparation stage, as shown in FIGS. 3A and 3B, the body portion 10 of the block B of the tool holder 3b is placed on the upper end surface of the convex portion 6 on one side of the block A of the holder base 3a. Both inner side surfaces of the convex portions 9 and 9 of the block B are fitted to both end surfaces in the thickness direction of the convex portion 6 on one side of the block A. Thereafter, the tool holder 3b is moved from one side to the other side using both end surfaces in the thickness direction of the convex portion 6 as guide surfaces. The tool holder 3b is moved starting from the side without the tapered surface 11.

  When the tool holder 3b is moved, the center of gravity of the tool holder 3b moves from the right side to the left side in the drawing. As a result, the tool holder 3b rotates counterclockwise in the drawing for each block B, and the other end edge j of the body portion 10 of the block B that contacts the bottom surface of the groove portion of the block A is the other end of the block A. It is supported on the bottom of the concave groove on the side. As a result, the block B inclines to the left in the figure, and both inner side surfaces of the convex portions 9 and 9 of the block B engage with both side surfaces of the body portion 7 of the block A.

  In this state, the block B is in a two-surface constrained state by both side surfaces of the body portion 7 of the block A, and is prevented from rotating in the left-right direction. Thereby, it is not necessary to guide the tool holder 3b by hand, and the block B can be moved from one side of the block A to the other side only by an operation of pushing by hand.

When the block B is moved from the one convex part 6 side of the block A to the other convex part 6 side, it will be in the state shown to FIG.3 (c), (d).
In this state, the taper surface 11 of the block B moves on the inner edge of one convex portion 6 of the block A and is supported by this edge.
When the block B is further moved from this position to the other side, the other side of the block B descends to the upper surface (groove bottom surface) side of the body portion 7 which is the end of the concave groove 5 of the block A according to the angle of the tapered surface 11. The other edge j of the body portion 7 of the block B approaches the inner surface in the width direction of the other convex portion 9 of the block A.

  And if the taper surface 11 leaves | separates the edge of the convex part 6 of one side, it will lose support by an edge and will descend | fall by own weight. At this time, the edge j on the other side of the body portion 10 opposite to the tapered surface 11 side of the block B moves to a position where the clearance with the inner surface in the width direction of the other convex portion 6 of the block A is minimized. To do. Thereby, the tool holder 3b rotates clockwise in the figure. At this time, the tapered surface 11 of the block A escapes the body portion 10 of the block B and prevents interference. Thereafter, when the groove bottom surface of the block B becomes parallel to the groove bottom surface of the block A, the tool holder 3b is lowered in the direction of gravity by its own weight. Thereby, the bottom surface of the groove B of the block B is seated on the bottom surface of the groove A of the block A. In this state, the entire inner surface in the width direction of the convex portion 9 of the block B is engaged with the entire opposite side surfaces of the trunk portion 7 of the block A, and the entire opposite side surfaces of the trunk portion 10 of the block B are the convex portions of the block A. 6 and 6 are engaged with the entire inner surface. Therefore, the block B is in a positioning end state in which the block A is constrained by the four surfaces.

After completion of positioning, a bolt is passed through the bolt insertion hole 12 of the block B, and this is screwed into the block A or a screw hole 13 of a flange provided so as to be connected thereto.
The holder base 3a is much lighter than the conventional tool holder and is easy to handle. Also in this respect, the working time can be shortened. In addition, the groove 5 of the block A is open upward and on both sides, and can be cleaned by blowing air or wiping with a waste cloth.
Also in this respect, there is an advantage that biting and biting can be prevented.

  As shown in FIG. 3 (e), one end edge k in contact with the groove bottom surface (groove bottom surface) of the groove end of the groove 8 of the block B or a taper surface serving as a guide surface at the other edge j. 11 and a tapered surface 11 serving as a flank is provided on one end edge m or the other end edge l in contact with the inner surface in the width direction of the convex portion 6 of the concave groove opening of the block A, the tapered surface It cannot be engaged from the side opposite to the 11 side. Since the directionality is set in this way, an attachment error is prevented, and an unexpected situation can be prevented in advance.

<Comparative example>
Next, in order to compare with the two-member fixing structure according to the present embodiment, a fixing method when the tapered surface 11 is not provided will be described.
When the block A and the block B are not provided with the tapered surface 11, first, the block B is held with both hands, and the bottom surface of the groove B and the bottom surface of the groove A are opposed to each other at a twisted position. Next, while moving the block B, both side surfaces in the thickness direction of the body portion 7 of the block B and both inner side surfaces in the width direction of the convex portions 6 and 6 of the block A are arranged on the same plane. Each inner side surface of the convex part 9 and each side surface of the trunk | drum 7 of the block A are arrange | positioned on the same plane. When they are in the same plane, both side surfaces of the body portion 10 of the block B and the inner surface of the convex portion 6 of the block A guide the inner surface of the convex portion 6 of the block A and both side surfaces of the body portion 10 of the block B, respectively. Although it is possible to simultaneously fit as surfaces, it is easy to cause galling when the surfaces are simultaneously fitted. In this case, between both side surfaces in the thickness direction of the body portion 10 of the block B and both inner side surfaces in the width direction of the convex portions 6 and 6 of the block A, and inner side surfaces of the convex portions 9 and 9 of the block B, When the clearance between the side surfaces of the body portion 7 of the block A is increased to create play, it becomes difficult for biting and galling to occur. However, precise positioning with a tolerance of fitting between the groove A of the block A and the groove 8 of the block B being 1/100 to 3/100 cannot be performed, and the total load acts on the bolt, so that the reliability is high. There is a problem of lowering.
As another structure for fixing the tool holder 3b to the holder base 3a, a structure in which the block A and the block B are fitted in a slide shape is assumed. However, even in this case, galling is likely to occur when the slide surfaces are fitted to each other. Also, when the slide structure is used, when both are fixed with bolts, the bolts are fastened while visually confirming the alignment between the bolt insertion holes and the screw holes, which takes time. There is a problem.

<Effect of Embodiment>
According to the present embodiment, the tool holder can be attached and detached in a shorter time than before, and it is possible to sufficiently cope with complicated replacement. In particular, when the two-member fixing structure according to the present embodiment is applied to a tool holder of a machine tool, the tool holder can be replaced in a short time, so the waiting time until resuming the processing is greatly reduced, and the productivity is improved. Will improve. In addition, since the holder base is fixed to the tool post and the opening of the tool post is closed, it is possible to prevent chips from entering the machine and to prevent malfunction of the turret lathe caused by chips. Can do. In addition, when the tool holder is fixed to the holder base, the horizontal force generated during cutting is supported by shear, and the body portion receives a sliding force urged from the convex portion by compression. The strength does not decrease.
<Modification>

In the first embodiment, one end edge m in contact with the groove bottom surface of the groove B end of the block B and the other end in contact with the inner surface in the width direction of the protrusion 6 of the groove opening in the block A are described. Although the case where the tapered surface 11 is provided on the edge j has been described, the other end edge j of the body portion 10 in contact with the groove bottom surface of the groove groove end portion of the block B and the protrusion of the groove groove opening portion of the block A of the holder base 3a. Even when the tapered surface 11 is provided on one end edge l in contact with the inner side surface of the portion 6 in the width direction, the same operation and effect can be obtained by determining the dimensions of each portion as described with reference to FIG. .
In addition, when a communication hole (such as a screw hole or a hole for inserting a rotating shaft) connected to the opening on the turret side is provided in the holder base 3a and the communication hole is closed by a lid screwed into the holder base 3a, rotational cutting is performed. A tool shall be included in the cutting tool demonstrated in this Embodiment.

<Second Embodiment>
In the present embodiment, after the first positioning step, if the second positioning step is performed to prevent the biting between the block B and the block A in the second positioning step, a good fit without biting or biting can be achieved. Although it has been described that a match can be obtained, it is preferable that the fitting without causing a sticking is performed not only in the second positioning step but also in the first positioning step.
That is, as shown in FIG. 6, not only the tapered surfaces 11A and 11B are provided on the block A and the block B, but also the width of one convex portion of the groove A opening in the block A in the thickness direction of the block A. One end edge (x1) in contact with the inner surface in the direction and one end edge (FIG. 1, y1) of the body part in contact with the groove bottom surface of the groove end of block B, or block A in the thickness direction of block A Between the other end edge (x2) in contact with the inner surface in the width direction of the other convex part of the concave groove opening and the other end edge (y2) of the trunk part in contact with the concave groove bottom surface of the concave groove end part of the block B The tapered surfaces 11C and 11D may be added to the tapered surfaces 11A and 11B, respectively. In this case, the height of the tapered surfaces 11C and 11D in the depth direction of the groove is the same as the relationship between the tapered surfaces 11A and 11B.

  With reference to FIG. 7, an example of the fixing method of the tool holder 3b of 2nd Embodiment which has the added taper surface is demonstrated. This fixing method includes a swing fitting method (see FIG. 5) of the tool holder in which the tapered surfaces 11A and 11B are formed (see FIG. 5), and a tool holder in which the tapered surfaces 11C and 11D are formed in a direction perpendicular to the taper surfaces 11A and 11B. The swing fitting method (see FIG. 5) is a combined fixing method.

  The taper surface 11B of the block B is arranged on the opposite side of the block A taper surface 11A side across the central groove portion of the block A, and is opposite to the taper surface 11C side of the block B across the central groove portion of the block B. The block B is disposed above the block A so that the tapered surface 11D of the block A is disposed on the side (FIG. 7A).

  The block B is tilted so that one end of the groove groove edge on the other side to which the cutting tool 4 is attached is upward and the other edge of the groove groove edge on which the taper surface 11C is formed is downward. The other end corner of the groove end edge on one side of B is brought into contact with the corner of one end of the groove end edge on the other side where the tapered surface 11A of the block A is formed (FIG. 7B).

  While rotating the block B clockwise around the corner, the other side to which the cutting tool 4 is attached is lowered, and the block B is fitted into the concave groove 5 of the block A without being gnawed (FIG. 7C). ). When the fitting of the block B is completed, the block B is positioned on the block A in a four-surface constrained state.

  As described above, in the two-member fitting fixing structure according to the second embodiment, the block B is in a four-surface constrained state from the start to the end of the engagement, and therefore, when positioning the tool holder 3b. The workability can be improved dramatically. In addition, since neither biting nor galling occurs, the working time can be further shortened, and it is possible to sufficiently cope with the more complicated request for replacement of the tool holder 3b.

The fitting fixing structure and fixing method between two members according to the present invention can be applied to various fields such as connection between rotating shafts, connection between fixed shafts, connection between hardwares, connection between hardware and shafts, and the like. it can.

It is explanatory drawing which shows the turret and tool holder of the turret lathe which concern on the 1st Embodiment of this invention. It is explanatory drawing of the tool holder corresponding to the abc-d cut surface of FIG. 1, and an efgh cut surface. It is explanatory drawing which shows an example of the fixing method at the time of attaching a tool holder to the holder base which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the relationship of the dimension of the blocks A and B which concern on the 1st Embodiment of this invention. It is explanatory drawing which shows the other example of the fixing method at the time of attaching a tool holder to the holder base which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the turret and tool holder of the turret lathe which concern on the 2nd Embodiment of this invention. It is explanatory drawing which shows an example of the fixing method at the time of attaching a tool holder to the holder base which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

3a Holder base (base member)
3b Tool holder (fixed member)
A block 5 concave groove 6 convex portion 7 trunk portion 8 concave groove 9 convex portion 10 trunk portion j one edge k the other edge l one edge m the other edge

Claims (6)

A base member fixed to the mounted portion; and a fixed member fixed to the base member;
The base member includes a rectangular parallelepiped block A,
The block A has a concave groove formed on the upper surface of the block A in the thickness direction of the block A, a convex portion formed on both sides of the concave groove by the formation of the concave groove, and a trunk portion.
The fixed member includes a rectangular parallelepiped block B,
The block B has the same thickness as the concave groove of the block A and a width larger than the thickness of the concave groove. The block B is formed on the lower surface of the block B in the thickness direction of the block and is engaged with both convex portions of the block A. And a concave groove that fits perpendicularly to the concave groove of the block A, a convex portion formed on both sides of the concave groove by the formation of the concave groove, and a trunk portion,
Tapered surfaces are respectively formed on one end edge in contact with the groove bottom surface of the body of block B and the other edge in contact with the inner surface of the groove in the protrusion of block A. The concave groove engages with the concave groove of the block A, and the other side surface of the block B where the tapered surface is not formed is the inner side of the convex portion of the block A where the tapered surface is formed. In a state where the side surface is in contact with one side where the tapered surface of the block A is in contact, the side surface is formed as a flank that allows rotation of the block B around the rotation axis,
The depth of the groove of the block B is determined to be different from the depth of the groove of the block A,
The heights H1 and H2 of the tapered surfaces of the block A and the block B in the depth direction of the groove are H>H1> H / 2 and H>H2> H / 2, respectively, where the depth of the groove of the block A is H.
To meet the relationship
The fixed member is constrained on both inner side surfaces in the thickness direction of the block B on both inner side surfaces in the width direction of both convex portions of the block A, and on both end surfaces in the thickness direction of the body portion of the block A. The both inner side surfaces in the width direction of both convex portions of the block B are fixed to the attached portion by a fixture in a fitted state of the concave grooves constrained by two surfaces.
Two-member fixed structure. A base member fixed to the mounted portion; and a fixed member fixed to the base member;
The base member includes a rectangular parallelepiped block A,
The block A has a concave groove formed on the upper surface of the block A in the thickness direction of the block A, a convex portion formed on both sides of the concave groove by the formation of the concave groove, and a trunk portion.
The fixed member includes a rectangular parallelepiped block B,
The block B has the same thickness as the concave groove of the block A and a width larger than the thickness of the concave groove. The block B is formed on the lower surface of the block B in the thickness direction of the block and is engaged with both convex portions of the block A. And a concave groove that fits perpendicularly to the concave groove of the block A, a convex portion formed on both sides of the concave groove by the formation of the concave groove, and a trunk portion,
Tapered surfaces are respectively formed on one end edge in contact with the groove bottom surface of the body of block B and the other edge in contact with the inner surface of the groove in the protrusion of block A. The concave groove engages with the concave groove of the block A, and the other side surface of the block B where the tapered surface is not formed is the inner side of the convex portion of the block A where the tapered surface is formed. In a state where the side surface is in contact with one side where the tapered surface of the block A is in contact, the side surface is formed as a flank that allows rotation of the block B around the rotation axis,
The heights H1 and H2 of the tapered surfaces of the block A and the block B in the depth direction of the groove are H, and the depth of the groove of the block A is H.
H1> H-H2 and H2 ≦ H / 2
Or
H2> H−H1 and H1 ≦ H / 2
To meet the relationship
The fixed member is constrained on both inner side surfaces in the thickness direction of the block B on both inner side surfaces in the width direction of both convex portions of the block A, and on both end surfaces in the thickness direction of the body portion of the block A. Block B
The both inner side surfaces in the width direction of both convex portions are fixed to the attached portion by a fixture in a fitted state between the concave grooves constrained by two surfaces.
Two-member fixed structure. Further, a taper surface is formed on one end edge in contact with the bottom surface of the groove A of the block A and on the other end edge in contact with the inner surface of the groove in the convex portion of the block B. Is engaged with the concave groove of the block A, and the other side surface of the body portion of the block A where the tapered surface is not formed is the inner side surface of the convex portion of the other side where the tapered surface of the block B is formed. 3. The two-member according to claim 1, wherein the block B is formed so as to be a flank that allows rotation of the block B around the one side as a rotation axis in a state in which the side contacts the taper surface of the block B. 4. Fixed structure. A holder base fixed to the tool post of the machine tool, and a tool holder fixed to the holder base,
The holder base includes a rectangular parallelepiped block A,
The block A has a concave groove formed in the thickness direction of the block A on the upper surface of the block A, and convex portions and a trunk portion formed on both sides of the concave groove by the formation of the concave groove,
The tool holder includes a rectangular parallelepiped block B,
The block B has the same thickness as the width of the groove of the block A, a width larger than the thickness of the groove,
The block B is formed on the lower surface of the block B in the thickness direction of the block, and engages with both convex portions of the block A and engages perpendicularly to the concave grooves of the block A, and the formation of the concave grooves. It has a convex part formed on both sides of the concave groove, and a trunk part,
Tapered surfaces are respectively formed on one end edge in contact with the groove bottom surface of the body of block B and the other edge in contact with the inner surface of the groove in the protrusion of block A. The concave groove engages with the concave groove of the block A, and the other side surface of the body portion of the block B where the tapered surface is not formed is the inside of the convex portion of the other side where the tapered surface of the block A is formed. In a state where the side surface is in contact with one side where the tapered surface of the block A is in contact, the side surface is formed as a flank that allows rotation of the block B around the rotation axis,
The depth of the groove of the block B is determined to be different from the depth of the groove of the block A,
The heights H1 and H2 of the tapered surfaces of the block A and the block B in the depth direction of the groove are H>H1> H / 2 and H>H2> H / 2, respectively, where the depth of the groove of the block A is H.
To meet the relationship
The tool holder is constrained on both side surfaces in the thickness direction of the block B on both inner side surfaces in the width direction of both convex portions of the block A, and blocks on both end surfaces in the thickness direction of the body portion of the block A. The both inner side surfaces in the width direction of both convex portions of B are fixed to the holder base with a fixture in a fitted state between the concave grooves constrained on two surfaces.
Tool holder for machine tools. A holder base fixed to the tool post of the machine tool, and a tool holder fixed to the holder base,
The holder base includes a rectangular parallelepiped block A,
The block A has a concave groove formed in the thickness direction of the block A on the upper surface of the block A, and convex portions and a trunk portion formed on both sides of the concave groove by the formation of the concave groove,
The tool holder includes a rectangular parallelepiped block B,
The block B has the same thickness as the width of the groove of the block A, a width larger than the thickness of the groove,
The block B is formed on the lower surface of the block B in the thickness direction of the block, and engages with both convex portions of the block A and engages perpendicularly to the concave grooves of the block A, and the formation of the concave grooves. It has a convex part formed on both sides of the concave groove, and a trunk part,
Tapered surfaces are respectively formed on one end edge in contact with the groove bottom surface of the body of block B and the other edge in contact with the inner surface of the groove in the protrusion of block A. The concave groove engages with the concave groove of the block A, and the other side surface of the block B where the tapered surface is not formed is the inner side of the convex portion of the block A where the tapered surface is formed. In a state where the side surface is in contact with one side where the tapered surface of the block A is in contact, the side surface is formed as a flank that allows rotation of the block B around the rotation axis,
The heights H1 and H2 of the tapered surfaces of the block A and the block B in the depth direction of the groove are H, and the depth of the groove of the block A is H.
H1> H-H2 and H2 ≦ H / 2
Or
H2> H−H1 and H1 ≦ H / 2
To meet the relationship
The tool holder is constrained on both side surfaces in the thickness direction of the block B on both inner side surfaces in the width direction of both convex portions of the block A, and blocks on both end surfaces in the thickness direction of the body portion of the block A. The both inner side surfaces in the width direction of both convex portions of B are fixed to the holder base with a fixture in a fitted state between the concave grooves constrained on two surfaces.
Tool holder for machine tools. Further, a taper surface is formed on one end edge in contact with the bottom surface of the groove A of the block A and on the other end edge in contact with the inner surface of the groove in the convex portion of the block B. Is engaged with the concave groove of the block A, and the other side surface of the body portion of the block A where the tapered surface is not formed is the inner side surface of the convex portion of the other side where the tapered surface of the block B is formed. 6. The machine tool according to claim 4, wherein the block B is formed so as to be a flank that allows rotation of the block B around the one side as a rotation axis in a state of being in contact with one side in contact with the tapered surface of the block B. 7. Tool holder.

Images