JP2001234909A - Fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixture for a rotating member easily attachable and detachable and rigidly fixable. SOLUTION: This device comprises a combination of a first member A, a second member B and a clamping bolt C. The first member A has a base part 1 with a square cross section and an inclined plane 5, the base part 1 has a hole 4 for inserting the bolt in an axial direction of the first member, and the second member has an inclined plate 15. This fixture is composed so that the second member is moved in the axial direction by the clamping bolt C in a state of the inclined faces of the first and second members abutted to each other for forming a diagonal line of a cross section formed together by the first and second members so that it is longer than a diagonal line of the base part of the first member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing tool used for fixing a rotary shaft to a pulley.

[0002]

2. Description of the Related Art Conventionally, as this kind of fixing device, a device in which a wedge-shaped key is driven into a key groove is used. Since the key used by driving is difficult to remove, the inventor of the present application has previously proposed a fixing tool combining a tapered surface as an alternative (Japanese Patent Laid-Open No. Hei 7-22481).
4). The fastener of the invention is provided with a tapered groove portion having two surfaces perpendicular to the first member, and a second member B which fits into the groove portion and forms a column in cooperation with the first member. Combine
The first member and the second member are connected by a tightening bolt inserted in the axial direction.

[0003]

The above-mentioned conventional fastener is
It can be fixed and released by the operation of the tightening bolt, and the problem of the driving type key has been solved. However, there are the following problems. First, since the tapered surface is provided in the groove portion of the first member, the shape is complicated and processing is difficult. Second, the two members are moved along the tapered surface by screwing the distal end side of the bolt inserted through one member to the female screw of the other member and tightening, and the cross-sectional area formed by both members Therefore, there is a case where the shaft center shifts with the movement of both members and the tightening bolt cannot be sufficiently tightened.

[0004]

According to the present invention, there is provided a fastener comprising a combination of a first member, a second member, and a tightening bolt. The first member has a base having a rectangular cross section and an inclined surface, the base has a hole for bolt insertion in the axial direction of the first member, the second member has an inclined surface, and the first member By moving the two members relative to each other in the axial direction with the tightening bolt in a state where the inclined surfaces of the first member and the second member are in contact with each other, the first member and the second member are formed jointly in the axial direction. The length of the diagonal line in the orthogonal cross section is formed to be longer than the length of the diagonal line of the base of the first member.

According to a second aspect of the present invention, a female screw is formed in a hole for inserting the tightening bolt of the first member, and the second member has a bolt with which an end of the tightening bolt inserted through the first member comes into contact. The actuating part, which has the receiving surface and the inclined surface of both members, is formed so that the cross-sectional area increases toward the tip.
According to a third aspect of the present invention, the hole for inserting the tightening bolt of the first member is a stupid hole, and a female screw is formed in the second member, into which the tightening bolt having the first member inserted is screwed. Both of the working parts having the surfaces formed are such that the cross-sectional area becomes smaller toward the tip. According to a fourth aspect of the present invention, the inclined surface is formed by a surface perpendicular to both side surfaces of the first member. According to a fifth aspect of the present invention, the inclined surface has a twist relationship with the outer surface of the first member. It is composed of planes. According to a fifth aspect of the present invention, the inclined surface is formed by a surface having a torsion relation with the outer surface of the first member.

[0006] The invention of claim 6 is a further embodiment of the invention of claim 2. That is, the first member has a base having a rectangular cross section and a concave portion into which the second member is fitted, and the base has a female screw hole for inserting a bolt in the axial direction of the first member. The bottom is an upwardly inclined surface facing the tip side. The second member has a bolt receiving surface with which a bolt end joined to the first member abuts, and an inclined surface that abuts an inclined surface of a groove of the first member, and the first member and the second member The second member can be moved in the axial direction by the tightening bolt while the inclined surface of the second member is in contact with the second member.

[0007]

In the present invention, the first member and the second member are formed with inclined surfaces, and the inclined surfaces are in contact with each other.
By the action of the tightening bolt, the two members are displaced in opposite directions along the inclined surface, and the outer surfaces of the two members are pressed against the wall of the keyway. Therefore, the size of the key member is not required to be high precision with respect to the key groove, the key does not need to be driven, and the rotating member is securely fixed by tightening the tightening bolt.

According to the second aspect of the present invention, when the tightening bolt is screwed into the female screw of the first member, the tip of the tightening bolt presses against the second member, and both members relatively move in the separating direction. I do. Since the cross-sectional area of the operating portion is large on the distal end side, the cross-sectional area increases with the movement of both members, and the working portion is pressed against the key groove. In the present invention, since no bolt hole is provided in the second member, high strength can be obtained. According to the third aspect of the present invention, when the tightening bolt is screwed into the female screw of the second member, the two members relatively move in the opposite direction. Since the area of the operating portion is small on the distal end side, the cross-sectional area increases with the movement of both members, and the operating portion is pressed against the key groove.

According to the fifth aspect of the present invention, since the inclined surface is in a torsion relationship with the outer surface, the two members move while being twisted with the movement of the two members, and the edges of both members are in the keyway. It is crimped and fixed more strongly.

[0010] In the invention of claim 6, the same operation as that of the invention of claim 2 can be obtained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fastener according to the present invention comprises a first member A, a second member B, and a tightening bolt C. The first member A is composed of a base 1 having a rectangular cross section and an operating section 2 having an inclined surface. The base 1 has a rectangular cross section and is provided with a bolt insertion hole 4 having a female screw 3 along the axis (longitudinal direction) of the first member. The operating portion 2 has two outer surfaces orthogonal to each other as an extension of the base portion 1 and an inclined surface 5 having a torsional relationship with the axis of the first member. The inclined surface 5 is configured such that the cross-sectional area of the operating portion 2 is small on the base side and gradually increases toward the distal end side. A female screw which is an extension of the female screw 3 of the base 1 is formed on the inclined surface 5.

The second member B comprises a base portion 11 and an operating portion 12 having an inclined surface. The base 11 has a rectangular cross-section, and the operating portion 12 has two orthogonal outer surfaces that are extensions of the base and an inclined surface 15 that is in a torsional relationship with the axis of the second member. This inclined surface 15 is
The cross-sectional area of 2 is small on the base side and gradually increases toward the tip side, and when the inclined surface of the first member is brought into contact, the operating portions of the first member and the second member cooperate. It is configured to form a rectangular cross section. The distal end surface of the operating portion 12 is a bolt receiving surface 13 perpendicular to the outer surface.

The operation of the fixing device of this embodiment is as follows. The first member A and the second member B are combined by bringing their respective inclined surfaces into contact with each other, and mounted in the key groove 21. Next, the fastening bolt C is screwed into the female screw 3 of the first member A. After the tip of the tightening bolt C has hit the bolt receiving surface 13 of the second member B, the tightening bolt is further advanced. At this time, the second member B is pressed by receiving a rightward force in FIG. 2 by the tightening bolt C, and the first member A receives a leftward force in FIG. 2 by a reaction. As a result, both members move by receiving the force in the separating direction. Here, since the first member and the second member abut on the inclined surfaces 5 and 15, the cross-sectional area formed by the operating portions 2 and 12 of the first member and the second member gradually increases, and the diagonal line thereof Is also longer. Therefore, the operating portions of the first member and the second member are pressed against the key groove and fixed. To release the fixation, the fastening bolt C may be rotated in the reverse direction.

In the above-described embodiment, the base 11 is provided on the second member. However, the base of the second member is required only to be gripped by the tool when the second member is manufactured. The function as a fixing tool does not change. Therefore, the base 11 of the second member is not essential. In addition, the inclined surfaces 5 and 15 are formed by combining the first member and the second member to form a column having a rectangular cross section, and the cross-sectional area formed by the first member and the second member due to the movement of the second member. What is necessary is just to meet the requirements of becoming large and the diagonal line becoming long. Therefore, it is not essential that the inclined surface has a torsional relationship with the axis.

FIG. 5 shows an embodiment of the third aspect of the present invention. Here, the first member A and the second member B have operating portions 2 and 12 having respective bases 1 and 11 and inclined surfaces 5 and 15, and the inclined surfaces 5 and 15 correspond to the side surfaces 6 and 16 of each member. At right angles (not in twisted position). Further, the cross-sectional area of the two operating portions 2 and 12 is maximum at the base portion and is reduced toward the distal end. The tightening bolt insertion hole 4 of the first member A is a stupid hole, and has a diameter sufficiently larger than the diameter of the tightening bolt so that tightening can be performed even if the axes of the two members are shifted from each other. A bolt insertion hole 14 is also provided in the second member B, and a female screw 17 is formed in the bolt insertion hole 14. The length of the tightening bolt C is shorter than the sum of the lengths of the bolt insertion holes 4 and 14 of the first member and the second member.

Insert the fixing device of this embodiment into the keyway,
The tightening bolt C is inserted through the bolt insertion hole 4 of the first member and screwed into the female screw 17 of the second member. When the tightening bolt C is tightened, the first member A is pushed by the tightening bolt C, and FIG.
The second member B moves leftward in FIG. 5 as the second member B is pulled by the tightening bolt C. For this reason, since both members move in the opposite direction while making the inclined surfaces 5 and 15 abut,
The cross-sectional area formed by the working parts increases and the length of the diagonal increases. Therefore, the fastener presses against the keyway,
It is fixed.

FIG. 6 shows an embodiment of the present invention. The first member A is a rod having a rectangular cross section, and includes a base 1 having a bolt insertion hole 4 and a groove 1 in which the second member B fits.
Eight. The groove 18 has a vertical wall on the base side, and an inclined surface 5 facing upward from the base side to the distal end side.
There is. The second member B has the same cross section as the groove of the first member, and has a vertical bolt receiving surface 13 and the groove 1.
And an inclined surface 15 which comes into contact with the inclined surface 8. Also in this embodiment, when a tightening bolt is screwed into the bolt insertion hole 4 of the first member and the second member is pressed by the tip, the cross section constituted by the first member and the second member becomes large, The tool presses into the keyway and is fixed.

The fastener shown in FIG. 6 is extremely easy to manufacture and practical. That is, when a large number of rods are arranged and fixed and the groove 18 is cut, a large number of first members are obtained at the same time, and the cut portion can be used as a second member.

[0019]

According to the present invention, the inclined surfaces are provided on the first member and the second member, and the cross-sectional area and the diagonal length are increased by the relative movement of the two members. Thereby, the outer surface of the fixing tool can be pressed against the key groove. Therefore, the rotating member can be fixed without hitting the key or using a special technique.
Then, loosening the tightening bolt releases the fixation,
The rotation member can be easily and quickly removed. Since the inclined surface of the present invention has a simple configuration, it can be easily manufactured, and a fixture with high productivity can be obtained.

According to the second aspect of the present invention, since it is sufficient to provide the bolt insertion hole only in the first member, the manufacture is further facilitated, and since a torsional force acts, a strong fixing force can be obtained. it can. The same applies to the invention of claim 6. According to the third aspect of the present invention, the bolt insertion hole of the first member has a size that can cope with the displacement of the shaft center. Therefore, there is no possibility that the bolt cannot be tightened due to the displacement of the shaft center. Strength can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view showing the same use state.

FIG. 4 is a sectional view showing a relationship between a first member and a second member.

FIG. 5 is a side view of another embodiment of the present invention.

FIG. 6 is a perspective view of an embodiment of the invention according to claim 6;

FIG. 7 is a front view of the same combination.

[Explanation of symbols]

 Reference Signs List A First member B Second member C Tightening bolt 1 Base 2 Working part 3 Female screw 4 Bolt insertion hole 5 Inclined surface 6 Side surface 11 Base 12 Working part 13 Bolt receiving surface 14 Bolt insertion hole 15 Inclined surface 16 Side surface 17 Female screw 18 grooves

Claims (6)

[Claims] 1. A first member, a second member and a fastening bolt are combined, wherein the first member has a base having a rectangular cross section and an inclined surface, and the base has a bolt in the axial direction of the first member. It has a hole for insertion, the second member has an inclined surface, and the second member is moved in the axial direction by the tightening bolt in a state where the inclined surfaces of the first member and the second member are in contact with each other. Thereby, the length of the diagonal line in the cross section orthogonal to the axial direction formed by the first member and the second member is formed to be longer than the length of the diagonal line of the base of the first member, Fixing tool 2. A bolt insertion hole of the first member has a female screw, and the second member has a bolt receiving surface with which an end of the screw inserted through the first member contacts. The fastener according to claim 1, wherein both the operating portion having the inclined surface of the member and the second member are formed so that the cross-sectional area increases toward the distal end side. 3. The bolt insertion hole of the first member is formed as a stupid hole having a diameter sufficiently larger than that of the tightening bolt so that the bolt can be tightened even if the axis is shifted during tightening. Forming a female screw into which the tightening bolt inserted is screwed, and the operating portion having the inclined surface of the first member and the second member is formed such that the cross-sectional area thereof is reduced toward the distal end side. Item 1. The fixing device according to Item 1. 4. The fastener according to claim 1, wherein the inclined surface is a surface perpendicular to both side surfaces of the first member. 5. The fixing device according to claim 1, wherein the inclined surface is formed by a surface having a twist relationship with an outer surface of the first member. 6. A first member, a second member and a fastening bolt are combined, wherein the first member has a base having a rectangular cross section and a concave portion into which the second member is fitted. It has a female screw hole for bolt insertion in the axial direction of the member,
The bottom is an upwardly inclined surface facing the distal end side, and the second member has a bolt receiving surface with which a bolt end joined to the first member abuts and an inclined surface with which the groove of the first member abuts. The first member and the second member cooperate by moving the second member in the axial direction by the tightening bolt in a state where the inclined surfaces of the first member and the second member are in contact with each other. The length of the diagonal line in the cross section perpendicular to the axial direction formed by
A fastener formed to be longer than a diagonal length of a base of the first member