JPH08114212A - Fixing mechanism of shaft-like member and holed member - Google Patents

Abstract

PURPOSE: To provide such a simple fixing mechanism that fixedly holds a shaft with a large holding force and is easily manufactured in the case of detachably fixing a shaft member with a holed member at one touch. CONSTITUTION: A bracket 6 with a fitting hole 8 is mounted on the mount hole 4 of a holed member 3 and a screw slotted groove 10 extending from the outer face side of the bracket to the fitting hole is provided around the bracket 6. A semicircular spring 12 having larger curvature radius than the radius of the fitting part 2 of a shaft member 1 is fittedly held in the screw slotted groove in such a state as projecting its intermediate part in the fitting hole. On the other hand, the fitting part 2 of the shaft member is provided with a tapered introduction slope 14 at its tip, and a groove 15 for fitting a semicircular spring 12 in the central part, a holding slope 16 for converting a fastening force of the semicircular spring into an axial propulsion force is provided in the tip side of the fitting part in the groove, and an abutting face 17 for abutting on the bracket is provided in the shaft member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening mechanism for detachably fastening a shaft-like member to another member having a hole with one touch.

[0002]

2. Description of the Related Art Various mechanisms are known as means for removably attaching a shaft-like member to another member having a hole with one touch. The present inventors have also proposed a structure in which a spring receiver is detachably attached to a guide shaft for tension adjustment in a yarn feeding tension device of a three-dimensional fabric loom (Japanese Patent Application No. 05-090834). In this structure, the guide shaft is provided with a circumferential groove into which the elastic ring can be mounted in a semi-protruding state, and the elastic ring fitted in the circumferential groove of the guide shaft is housed in the inner circumferential groove of the spring receiver attached to the guide shaft. The spring bearing is press-fitted from the shaft end of the guide shaft, the elastic ring is fitted into the circumferential groove of the guide shaft, and the spring bearing is fixed at that position. As the elastic ring, an O-ring shape made of rubber or the like, a C-type elastic metal ring partially having a cut, or a ring shape in which both ends of a coil spring are connected by screwing can be used.

The structure described above is effective when a large holding force is not required between the shaft-shaped member and the other perforated member, but when the holding force needs to be increased, C is used.
It is necessary to increase the rigidity by using a type elastic metal spring. However, if the rigidity is increased, the elastic limit will be exceeded when it is fitted in the groove, and the C-type elastic metal spring will be deformed and cannot be used.

[0004]

SUMMARY OF THE INVENTION A technical object of the present invention is to enable a shaft to be fastened and held with a large holding force when the shaft-shaped member is detachably fastened to another holed member with one touch. It is to provide a fastening mechanism. Another technical problem of the present invention is to fix a shaft-shaped member to another member having a hole with a structure that is simple and easy to manufacture and that enables stable positioning of the shaft-shaped member in the axial direction. To get the wearing mechanism. Another technical problem of the present invention is that the shaft-like member is stably fixed to the other perforated member in a non-separable manner, but can be easily separated by using a simple tool. To obtain a fastening mechanism that can be done.

[0005]

A fastening mechanism of the present invention for solving the above-mentioned problems is a fastening mechanism for detachably fastening a shaft-shaped member to another perforated member, A bracket having a fitting hole into which a shaft-shaped member is fitted is attached to the mounting hole of the perforated member, and the fitting hole is provided around the bracket at a position offset from the center line from the outer surface side of the bracket. Is provided with a slit groove, and a half-moon spring having a radius of curvature larger than the diameter of the fitting portion of the shaft-like member is inserted into and held in the slot by protruding the middle portion thereof into the fitting hole. The fitting portion of the shaft-shaped member to be inserted into the fitting hole is provided with a tapered introduction slope for facilitating the insertion into the fitting hole, and the half-moon spring is fitted into the central portion. It is characterized in that a groove is provided.

In the above fastening mechanism, the tightening force of the half-moon spring is converted into an axial thrust at the tip side of the fitting part in the groove into which the half-moon spring provided in the fitting part of the shaft-like member fits. A holding slope can be provided, and the shaft-shaped member can be provided with an abutment surface that receives the thrust by hitting the bracket, or a groove in which the half-moon shaped spring provided in the fitting portion of the shaft-shaped member is fitted. In addition to forming a simple concave groove, an axial groove is provided at a position corresponding to the central portion of the half-moon spring in the fitting portion of the shaft-shaped member, and is inserted into the axial groove to spread the half-moon spring U A character tool can be installed separately.

[0007]

In the fastening mechanism having the above structure, the central portion of the half-moon spring fitted and held in the slot groove of the bracket protrudes inside the fitting portion of the bracket. When the fitting part is inserted, the half-moon shaped spring is spread by the introduction slope of the tip of the fitting part, and when the fitting part is further inserted, the central part of the half-moon shaped spring is aligned with the holding part slope of the fitting part. Overhanging in the groove, the tightening force of the half-moon spring is converted into an axial thrust, and the shaft-shaped member is accurately positioned at the position where the contact surface of the shaft-shaped member abuts the end surface of the bracket. When pulling out the fitting portion of the shaft-shaped member from the fitting hole of the bracket, it is sufficient to apply a pulling force in the pulling direction between the shaft-shaped member and the member having a hole. Since the half-moon spring is spread and pushed into the slot, the fitting portion of the shaft member can be pulled out.

Further, when the groove of the fitting portion of the shaft-shaped member is a simple concave groove, even if the fitting portion of the shaft-shaped member is pulled out from the bracket, the half-moon spring is locked in the groove to both. Does not come off, and is stably attached. When pulling out the fitting portion of the shaft-shaped member from the bracket, the tip of the tool may be inserted into the axial groove in the fitting portion and the central portion of the half-moon spring may be expanded to thereby fit the half-moon spring. Since it is removed from the groove of the part, the fitting part can be extracted.

[0009]

1 and 2 show a first embodiment of a fastening mechanism according to the present invention. In the fastening mechanism of this embodiment, the fitting portion 2 of the actuator 1 having a circular cross section, which is a shaft-shaped member, is
The bracket 6 fixed to the other hole member, that is, the plate-shaped frame 3 in a detachable manner with one touch, is fixed to the mounting hole 4 of the frame 3 at the center thereof. 2 is formed by a bracket main body 7 having a fitting hole 8 into which the two are fitted, and a sleeve 9 externally fitted to the bracket main body 7, and a pair of slot grooves facing the position offset from the center line around the bracket main body 7. 10 are provided. The depth of the slot groove 10 reaches from the outer surface side of the bracket body 7 to a substantially middle portion in the radial direction of the fitting hole 8.

A half-moon shaped spring 12 having a radius of curvature larger than the diameter of the fitting portion 2 of the actuator 1 is fitted and retained in the slot 10 by projecting an intermediate portion thereof into the fitting hole 8. The half-moon spring 12 is formed by cutting out from a ring-shaped spring material having a radius of curvature larger than the diameter of the fitting portion 2 at a position offset from the center line and chamfering acute-angled portions at both ends. . In its manufacture, if a close contact coil spring S as shown in FIG. 3 is used, cutting at the offset position A and chamfering at both end positions B are performed in the shape of the coil spring. It is possible to manufacture a circular spring, and in this case, the half-moon spring has a slightly twisted shape, but it has almost the same shape as the case of manufacturing from a ring of a perfect circle, and there is no problem in practical use.

The half-moon shaped spring 12 is attached to the bracket 6
When it is assembled to the bracket body 7, it is fitted into the slit groove 10 of the bracket body 7, and then the sleeve 9 covering the slit groove 10 is prevented so that the half-moon spring 12 does not fall off.
It is easy to assemble by fixing the external fitting,
Although it is desirable to stably maintain the assembled state, there is no functional change without the sleeve 9. The fixing of the sleeve to the bracket main body 7 is not limited to the caulking 13 as shown in the drawing, but may be fixed by screws, snap rings,
A general fixing method such as adhesion or welding can be adopted.

On the other hand, the fitting portion 2 of the actuator 1 inserted into the fitting hole 8 of the bracket 6 has a fitting hole 8 at the tip thereof.
In addition to providing a tapered introduction slope 14 for facilitating insertion into the groove, a groove 15 into which the half-moon spring 12 is fitted is provided in the central portion, and a half-moon shape is formed on the tip side of the fitting portion 2 in the groove 15. A holding slope 16 for converting the tightening force of the spring 12 into a thrust in the axial direction is provided. Further, the actuator 1 is provided with a contact surface 17 for receiving the thrust force,
By applying the contact surface 17 to the bracket 6, the actuator 1 is axially positioned.

In the above-mentioned embodiment, the case where two of the half-moon springs 12 are arranged on the same circumference of the bracket 6 in consideration of the balance is shown. However, one or a plurality of half-moon springs 12 are arranged on the same circumference. It is also possible to dispose them individually or disperse them in the axial direction and dispose a large number. Further, the fitting portion 2 of the actuator 1 is provided with a key 18 for preventing rotation so that not only the axial direction but also the rotational direction can be fixed at the same time.
It is also possible to use a general anti-rotation means.

In the fastening mechanism having the above-mentioned structure, the central portion of the half-moon spring 12 fitted and held in the slot groove 10 of the bracket body 7 protrudes inside the fitting portion 2 of the bracket body 7. Therefore, when the fitting portion 2 of the actuator 1 is inserted into the fitting hole 8 of the bracket body 7, the introduction slope 1 at the tip of the fitting portion 2 is inserted.
When the half-moon spring 12 is spread at 4, the both ends of the half-moon spring 12 slide on the inner surface of the sleeve 9,
The half-moon spring 12 is pushed into the slot 10.

When the fitting portion 2 of the actuator 1 is further inserted in this state, the central portion of the half-moon spring 12 extends from the slot groove 10 along the holding slope 16 of the groove 15 to the groove 1.
Overhangs within 5. Then, at the position where the contact surface 17 of the actuator 1 contacts the end surface of the bracket body 7,
If the half-moon spring 12 is configured to contact the holding slope 16, the tightening force of the half-moon spring 12 can be converted into an axial thrust force in the direction in which the contact surface 17 contacts the bracket body 7, and the position of the actuator in the front-rear direction is changed. Positioned accurately.

When pulling out the fitting portion 2 of the actuator 1 from the fitting hole 8 of the bracket body 7, it is sufficient to apply a pulling force between the actuator 1 and the frame 3 in the pulling direction, whereby the groove 15 of the groove 15 is pulled. Holding slope 1
The half-moon spring 12 is spread along the line 6 and is pushed into the slot groove 10, so that the fitting portion 2 of the actuator 1 can be pulled out.

When the holding slope 16 is not provided in the groove 15, the fitting portion 2 of the actuator 1 can be easily inserted into the fitting hole 8 of the bracket body 7, but the fitting portion 2 of the fitting portion 2 can be easily inserted. It can be configured so that it cannot be extracted. 4 to 6 show a second embodiment in which the groove 15 is not provided with a holding slope and the fitting portion of the actuator is pulled out by using a simple tool.

The fastening mechanism of the second embodiment is similar to the first embodiment, in that the fitting portion 22 of the actuator 21 is detachably fastened to the plate-shaped frame 23.
Bracket 2 fixed to the mounting hole 24 of the frame 23
6 is a bracket body 2 having the same structure as that of the first embodiment.
7 and a sleeve 29 fitted to the outside of the bracket body 7, and a half-moon spring 32 is fitted and held in a slot 30 of the bracket body 27. This half moon shaped spring 32
The structure of is also the same as that of the above embodiment.

On the other hand, the fitting portion 22 of the actuator 21 which is inserted into the fitting hole 28 of the bracket 26 has a tapered introduction slope 34 at the tip thereof, but the half-moon shaped spring 32 at the center portion is formed. The groove 35 to be fitted is formed in a simple concave groove shape without providing the one corresponding to the holding slope 16 of the first embodiment. Further, in relation to this, the actuator 21 is not provided with anything corresponding to the contact surface 17 of the first embodiment.

In the second embodiment, since the fitting portion 22 of the actuator attached to the bracket main body 27 is pulled out, the axial groove 36 is formed in the fitting portion 22 at a position corresponding to the center of the half-moon spring 32. Is provided.
Also, the half-moon spring 3 is inserted into the axial groove 36.
A U-shaped tool 39 for expanding 2 is separately provided. This tool 39 has a crescent-shaped spring 3 at its tip.
The slope 40 is provided to push the 2 apart.

The fastening mechanism of the second embodiment having the above construction is similar to that of the first embodiment in that the actuator 21
The fitting portion 22 is inserted into the bracket main body 27, the central portion of the half-moon spring 32 is fitted into the groove 35 provided in the fitting portion 22, and the actuator 21 is attached. In this fixed state, even if the fitting portion 22 of the actuator 21 is pulled out from the bracket 26, the groove 35
Due to the engagement of the half-moon spring 32 with respect to the two, they are not separated from each other and are stably fixed.

From the bracket body 27 to the actuator 2
When pulling out the fitting portion 22 of No. 1, as shown in FIG.
Axial groove 36 in the fitting portion 22 of the actuator 21
It suffices to insert the tip of the tool 39 into the groove and push out the central portion of the half-moon spring 32, which causes the half-moon spring 32 to separate from the groove 35 of the fitting portion 22, so that the fitting portion 22 can be extracted. it can. In the second embodiment, when the actuator 21 is rotatably held with respect to the bracket 26, the spring force of the half-moon spring 32 does not act on the inner bottom of the groove 35 of the fitting portion 22, and the second embodiment is the same as the first embodiment. This is an advantage over the first embodiment.

In the fastening mechanism of each of the embodiments described above, an actuator having a circular cross section is detachably fastened to a plate-shaped frame.
The present invention is not limited to this embodiment, and can be used for fixing any shaft-shaped member to another perforated member.

[0024]

According to the fastening mechanism of the present invention described above, when the shaft-shaped member is detachably fastened to the other perforated member with one touch, the shaft can be fastened and held with a large holding force. It is possible to obtain a fastening mechanism, and with a simple and easy-to-manufacture structure, it is possible to perform stable positioning of the shaft-shaped member in the axial direction, or the shaft-shaped member is stably separated from the perforated member. It is possible to obtain a fastening mechanism which is fastened by fixing but can be easily detached by using a simple tool.

[Brief description of drawings]

FIG. 1 is a partial side sectional view showing the configuration of a first embodiment of the present invention.

FIG. 2 is a transverse sectional view of the same.

FIG. 3 is a front view of a close contact coil spring for explaining a manufacturing process of a half-moon spring used in the present invention.

FIG. 4 is a side sectional view showing the configuration of the second embodiment of the present invention.

FIG. 5 is a transverse sectional view of the same.

FIG. 6 is a side sectional view showing a state where an actuator is removed in the embodiment.

[Explanation of symbols]

 1,21 Actuator (Shaft member) 2,22 Fitting part 3,23 Frame (Hole member) 4,24 Mounting hole 6,26 Bracket 8,28 Fitting hole 10,30 Slot groove 12,32 Half moon shape Spring 14,34 Introduction slope 15,35 Groove 16 Holding slope 17 Contact surface 36 Axial groove 39 Tool

Claims (3)

[Claims] 1. A fastening mechanism for detachably fastening a shaft-shaped member to another member having a hole, wherein a fitting hole for fitting the shaft-shaped member is provided in a mounting hole of the member having a hole. A bracket provided is attached, and a slit is formed around the bracket at a position offset from the center line to reach the fitting hole from the outer surface side of the bracket. A half-moon shaped spring with a radius of curvature larger than the diameter of the fitting part is inserted and held by protruding the middle part into the fitting hole, and the fitting part of the shaft-like member inserted into the fitting hole of the bracket is A shaft-shaped member and another perforated member, characterized in that a taper-shaped introduction slope for facilitating insertion into a fitting hole is provided at the tip, and a groove into which the half-moon shaped spring is fitted is provided in the central portion. Fastening mechanism with. 2. The fastening mechanism according to claim 1, wherein the tightening force of the half-moon spring is applied to the tip side of the fitting part in the groove into which the half-moon spring provided in the fitting part of the shaft-shaped member fits. A holding slope for converting the thrust into a directional force is provided, and the shaft-shaped member is provided with an abutment surface for receiving the thrust by hitting the bracket. mechanism. 3. The fastening mechanism according to claim 1, wherein the groove into which the half-moon shaped spring provided in the fitting portion of the shaft-shaped member is fitted is formed in a simple concave shape and the shaft-shaped member is fitted. The axial shape is characterized in that an axial groove is provided at a position corresponding to the central portion of the half-moon spring in the portion, and a U-shaped tool that is inserted into the axial groove and spreads the half-moon spring is separately provided. A fastening mechanism for a member and a member with a hole.