JPH07269541A - Fixing mechanism - Google Patents

Abstract

PURPOSE:To install a shaft form member to an installing member simply in one touch without using a tool, by regulating the position and the rotating angle. CONSTITUTION:While an insertion hole 24 of a shaft form member 21 is provided to the main body 23 of an installing member, a housing groove 26 of a U-shaped pin 25 crossing to the insertion hole 24 is provided to the main body 23, and the elastic U-shaped pin 25 whose both legs are faced to the insertion hole 24 is housed in the housing groove 26. On the other hand, while a tapered member 28 to expand the both legs 25a of the U-shaped pin 25 is provided at the front end of the shaft form member 21, a linear recessed groove 29 where the both legs 25a of the U-shaped pin 25 crossing over the tapered member 28 are inserted in the elastic and press-holding condition is also provided.

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 removably attaching a shaft or the like to a mounting member with its position and rotation angle restricted.

[0002]

2. Description of the Related Art Conventionally, C-shaped retaining rings and E-shaped retaining rings have been used as means for fixing a shaft to other members, but these regulate the position of the shaft but do not regulate rotation. It is something that cannot be done. Moreover, a special tool is required to attach and detach it. Further, if the shaft is fixed to another member by the pin, the position and rotation of the shaft can be regulated, but it is difficult to easily attach and detach the shaft.

In order to deal with such a problem, the inventor of the present invention has previously proposed a connecting structure as shown in FIGS. 17 and 18. In the connection structure shown in FIG. 17, since the shaft 1 and the mounting member 2 are detachably mounted, the pin 4 orthogonal to the axis line is installed in the shaft fitting insertion hole 3 provided in the mounting member 2,
The pin 4 is attached to the shaft head 1a having a taper outer surface of the shaft 1.
A split groove 5 having a width slightly smaller than the diameter of the pin 4 is provided, and a recess 6 into which the pin 4 is fitted is provided on an opposing surface in the split groove 5.
The pin 4 is held in the recess 6 in an elastically pressed and clamped state. When connecting the shaft 1 to the mounting member 2, the divided shaft head 1a of the shaft 1 may be press-fitted into the shaft fitting insertion hole 3 of the mounting member 2, whereby the shaft 1
The shaft head 1a is elastically deformed while being fitted into the shaft fitting insertion hole 3, and the pin 4 in the shaft fitting insertion hole 3 is dropped into a pair of recesses 52 provided in the shaft head 1a, thereby connecting the two. It To remove the shaft 1, simply pull out the shaft 1.

Further, in the connecting structure shown in FIG. 18, the E-shaped pin support holes 15 are provided on both sides 12a of the mounting member 12 in which the fitting and insertion holes 13 of the shaft 11 are formed by the bending of the plate, and are folded into an S shape. The bent elastic pin 14 is attached to one side of the insertion hole 13 so that the elastic pin 1
4 is provided so as to be elastically displaceable, a concave portion 16 into which the central portion 14a of the elastic pin 14 is fitted is provided on the side surface of the tip portion of the shaft 1, and the elastic pin 14 is inserted into the concave portion 16 of the shaft 1. It is to be elastically pressed against. Therefore, the shaft 11 is connected to the fitting insertion hole 13 by press fitting, and the shaft 11 is pulled out or rotated to rotate the concave portion 1
The shaft 11 can be removed by pulling it out after cutting the fitting with 6.

In such a proposed coupling mechanism, it is possible to connect the shafts 1 and 11 to the mounting members 2 and 12 by simply press-fitting the shafts 1 and 11 into the fitting holes 3 and 13 without using a tool. Similarly, the connection between the shafts 1 and 11 can be released only by pulling out the shafts 1 and 11 from the fitting holes 3 and 13. However, in the former connection structure, it is difficult to elastically deform the shaft head 1a when the shaft becomes thick and the rigidity becomes large. Therefore, it is limited to the case where the shaft 1 has a relatively small diameter. In the latter connection structure, the structure is complicated and the mounting member 1
There is a problem that the second form is limited to the case where the E-shaped pin support hole 15 can be provided, and in any case, the form of the shaft or the mounting member to which the connecting structure can be applied is limited.

[0006]

SUMMARY OF THE INVENTION A basic technical problem of the present invention is to attach a shaft-like member to a mounting member by restricting a position and a rotation angle, and easily and detachably mounting it without using a tool. To obtain a fastening mechanism that is designed to do so. A more specific technical problem of the present invention is that there are few restrictions on the form of the mounting member and it can be applied regardless of the size of the thickness of the shaft-shaped member to be fastened thereto, and the shaft having a simplified structure. The object is to obtain a fastening mechanism for the plate-shaped member and the mounting member. Further, another technical problem of the present invention is that a groove provided at the tip of the shaft-like member by both legs of the U-shaped pin in order to attach and detach the shaft-like member by restricting its position and rotation angle. It is to obtain a fastening mechanism that employs a simple mechanism of elastically pressing and pinching. A more specific technical problem of the present invention is to simplify the structure for fixedly holding the U-shaped pin used for fastening the shaft-like member to the mounting member, and to provide the fastening mechanism as an inexpensive one. To do.

[0007]

The fastening mechanism of the present invention for solving the above-mentioned problems is basically provided with a fitting insertion hole for a shaft-shaped member in a main body of a mounting member for mounting the shaft-shaped member. An accommodation groove for the U-shaped pin that intersects with the fitting insertion hole is provided, and an elastic U-shaped pin having both leg portions facing the fitting insertion hole is accommodated in the accommodation groove with a flexible region on both sides of the leg portion. It is fixedly held by the main body of the mounting member, and a taper portion for pushing and expanding both leg portions of the U-shaped pin is provided at the tip end portion of the shaft-shaped member, and both leg portions of the U-shaped pin beyond the tapered portion are provided. Is provided with a linear concave groove that fits in an elastic pressing and sandwiching state.

In the above-mentioned fastening mechanism, the U-shaped pin accommodating groove provided in the main body of the mounting member is provided in the enlarged groove intersecting with the fitting insertion hole of the shaft-shaped member provided in the main body. It is formed by accommodating the pin guide provided with the pin guide, and this pin guide can be fixedly held by the mounting member body together with the U-shaped pin by a bolt. In addition, a circular concave portion having the same depth as the accommodating groove of the U-shaped pin is provided around the fitting insertion hole of the shaft-shaped member in the main body of the mounting member, and the circular concave portion forms a flexible region of the U-shaped pin. The U-shaped pin can be fixedly held by the body of the mounting member by the C-shaped retaining ring engaged with the inner circumference of the circular recess. Further, in the above-mentioned fastening mechanism, the U for forming the U-shaped pin accommodating groove from one surface side of the main body of the mounting member.
The pin insertion groove leaving the engaging jaws of the mold pin is recessed, and reaches the inside of the engaging jaws from the other surface side of the mounting member main body,
It is also possible to form an auxiliary hole that forms a U-shaped pin receiving groove together with the pin insertion groove.

[0009]

In the fastening mechanism having the above construction, when the shaft-shaped member is press-fitted into the fitting insertion hole provided in the main body of the mounting member, the taper portion of the tip end of the shaft-shaped member pushes and spreads both legs of the U-shaped pin. However, when the taper portion enters the fitting insertion hole beyond the both leg portions of the U-shaped pin, the both leg portions are elastically pressed and held in the linear concave groove of the tip end of the shaft-shaped member. The shaft-shaped member is detachably attached to the attachment member by restricting the position and the rotation angle thereof. In addition, the form of the attachment member is not limited by the formation of the fastening mechanism, and is configured as a simple structure.

In the above fastening mechanism, the U-shaped pin accommodating groove provided in the main body of the mounting member is accommodated, and the pin guide having the U-shaped pin accommodating groove is accommodated in the enlarged groove provided in the main body. When this pin guide is fixedly held on the mounting member body with bolts together with the U-shaped pin,
It can be effectively used even when the mounting member main body is made of a relatively soft or low-strength material and may be damaged around the U-shaped pin during use.
Not only can the formation groove of the die pin be formed simply by forming the enlarged groove and fixing the pin guide from one surface of the attachment member, but also the U-shaped pin together with the pin guide can be attached to the attachment member main body by the bolt. It can be fixed easily.

Further, in the above-mentioned fastening mechanism, a circular recess having the same depth as the accommodating groove of the U-shaped pin is provided around the fitting insertion hole of the shaft-like member in the mounting member main body, and engages with the inner circumference of the circular recess. When the U-shaped pin is fixedly held on the main body of the mounting member by the C-shaped retaining ring, the mounting structure of the U-shaped pin to the mounting member is such that the accommodation groove and the circular recess are formed from one surface of the mounting member, and C The holding of the U-shaped pin by the die retaining ring is extremely simplified, and moreover, the bending region of the U-shaped pin can be formed by the circular recess.

Further, in the above-mentioned fastening mechanism, a pin insertion groove for leaving a U-shaped pin receiving groove for forming a U-shaped pin accommodating groove is recessed from one surface side of the main body of the mounting member. ,
When the auxiliary hole that reaches the inside of the engaging jaw from the other side of the mounting member main body and forms the U-shaped pin accommodating groove together with the pin insertion groove is recessed, the U-shaped pin is attached to the mounting member. By eliminating the need for using a bolt or the like for mounting, the mounting structure of the U-shaped pin can be simplified and the mounting member can be easily molded.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 to FIG. 5 show a first fastening mechanism according to the present invention.
The structure of an Example is shown. As shown in FIGS. 1 and 2, the fastening mechanism of the first embodiment is for attaching the shaft-shaped member 21 to the mounting member 22 in a detachable manner by restricting the position and rotation angle. The shaft-shaped member 21 is generally configured as a shaft having a circular cross section, but it does not necessarily have to be a shaft, and at least the fastening portion may be formed in a shaft shape. Also, the mounting member 22
The main body 23 is generally formed in a disc shape.

The mounting member main body 23 is provided with a fitting insertion hole 24 for the shaft-shaped member 21, and the mounting member main body 23.
On the bottom surface of the mounting member body 23, that is, on the surface of the mounting member main body 23 on the side where the fitted shaft member 21 projects from the fitting insertion hole 24, as clearly shown in FIGS. An accommodation groove 26 for the U-shaped pin 25 that intersects 24 is provided. The housing groove 26 has an oval shape in which the inner bottom portion bulges the flexure regions 26a of the U-shaped pin 25 on both sides of the central portion, and its mouth has engaging jaws 26b at both ends of the oval shape. It has substantially the same shape as the inner bottom portion except that it protrudes inward, and as a result, it has an oval shape in which both ends are hollowed out. An elastic U-shaped pin 25 having both leg portions 25a facing the fitting insertion hole 24 is provided on the inner bottom of the accommodation groove 26, and the flexible region 2 is provided on both sides of the both leg portions 25a.
6a is accommodated in a state of being held, and the curved head of the U-shaped pin 25 and the tips of both legs 25a are inserted into the inside of the engaging jaw 26b so as not to be easily separated from the attachment member main body 23. The U-shaped pin 25 is fixedly held.

On the other hand, as shown in FIGS. 2 and 5, on both side surfaces of the tip end portion of the shaft-like member 21, there are provided tapered portions 28 for pushing and expanding both leg portions 25a of the U-shaped pin 25, and the taper portions are formed. A recessed groove 29 having a linear groove bottom is provided beyond the portion 28, and when the shaft-shaped member 21 is inserted, both leg portions 25a of the U-shaped pin 25 beyond the tapered portion 28 are inserted into the recessed groove 29. The position and the rotation angle of the shaft-shaped member 21 can be regulated by fitting in an elastic pressing and sandwiching state.

In the fastening mechanism of the first embodiment having the above structure, when the tip of the shaft member 21 is press-fitted into the fitting hole 24 provided in the body 23 of the mounting member, the tip of the shaft member 21 is pressed. The tapered portions 28 on both sides enter the fitting insertion hole 24 while pushing and expanding both leg portions 25a of the U-shaped pin 25, and the tapered portion 28 enters beyond the both leg portions 25a of the U-shaped pin 25. As shown in FIGS. 2 and 4, the both leg portions 25a are fitted in the concave groove 29 having the linear groove bottom of the tip end portion of the shaft-like member 21 in an elastic pressing and sandwiching state.

In this way, the concave groove 29 of the shaft-like member 21 is formed.
By inserting both leg portions 25a of the U-shaped pin 25 into the
The axial position of the shaft-shaped member 21 with respect to the mounting member 22 is restricted, and both leg portions 25a of the U-shaped pin 25 are pressed against the linear groove bottom of the recessed groove 29, whereby the shaft-shaped member 2
The rotation angle of 1 is regulated, and further, the elasticity of the U-shaped pin 25 allows the shaft-shaped member 21 to be detachably fixed. In addition, by pulling out the shaft-shaped member 21 from the above-mentioned fixed state, the both leg portions 25a of the U-shaped pin 25 can be removed from the groove 29, and the shaft-shaped member 21 can be removed.

Like the U-shaped pin accommodating groove 26 of the first embodiment, the fastening mechanism of the second embodiment shown in FIGS. 6 to 8 has engaging jaws 26b at the mouths at both ends of the oval shape. When the accommodation groove 26 is projected inward and, as a result, when the accommodation groove 26 is formed into an oval shape in which both the insides of both ends are cut out, the accommodation groove 26 is molded.
Considering that processing may be difficult in some cases, the shape of the accommodation groove is a simple shape that can be easily molded and processed.

That is, in the second embodiment, the body 33 of the mounting member 22 is provided with the fitting hole 34 for the shaft-shaped member, and the bottom surface of the mounting member body 23 is as shown in FIGS. 6 and 7. Elongated U-shaped pin accommodating grooves 36 are provided on both sides of the central portion, which have the same shape from the mouth portion to the inner bottom portion, and are formed by bulging the bending regions 36a of the U-shaped pin 35. And
In the accommodating groove 36, the two leg portions 35a are provided with the fitting insertion holes 34
The elastic U-shaped pin 35 facing each other is accommodated in a state in which the bending regions 36a are provided on both sides of the both leg portions 35a, and the curved head portion of the U-shaped pin 35 and the tip ends of the both leg portions 35a are attached to each other. It is fixedly held by a bolt 37 screwed into 33. The shaft member used in the second embodiment is the same as that described in the first embodiment, and is detachably connected to the mounting member 22 by the same action. The same applies to the following examples.

In the fastening mechanism of the third embodiment shown in FIGS. 9 to 11, a U-shaped pin 45 provided on the main body 43 of the mounting member 42.
The accommodating groove having the flexure area 46a of the U-shaped pin 45 in the enlarged groove 47 intersecting the fitting insertion hole 44 of the shaft-shaped member provided in the main body 43 without directly providing the accommodating groove 46 in the main body 43. The pin guide 48 is formed by accommodating the opened pin guide 48, and the pin guide 48 is fixedly held together with the U-shaped pin 45 by the bolt 49 in the mounting member main body 43.

Therefore, in the fastening mechanism of the third embodiment,
When the pin guide 48 is made of a high-strength material such as hardened metal and the pin guide 48 is fixedly held together with the U-shaped pin 45 by the bolt 49 in the mounting member body 43, the mounting member body is relatively soft or It can be effectively used even when it is formed of a low-strength material and is likely to be damaged around the U-shaped pin 45 during use, and has a complicated shape as in the first embodiment. It is not necessary to form the accommodation groove of the U-shaped pin 45.
To form the enlarged groove 47 from one surface of the attachment member main body 43.
Not only can this be done simply by forming and the fixing of the pin guide 48, but also the U-shaped pin 45 together with the pin guide 48 can be easily fixed to the mounting member body 43 by the bolt 49.

The fastening mechanism of the fourth embodiment shown in FIGS. 12 and 13 has the same depth as the accommodating groove 56 of the U-shaped pin 55 around the fitting hole 54 of the shaft-shaped member in the main body 53 of the mounting member 52. A circular concave portion 57 is provided, and the circular concave portion 57 forms a flexible region 56a of the U-shaped pin 55, and a C-shaped retaining ring 58 is engaged with the inner periphery of the circular concave portion 57 to form a C-shaped retaining ring. The U-shaped pin 55 is fixedly held by the mounting member main body 53 by 58. In the figure,
Reference numeral 59 is a pin for preventing the C-shaped retaining ring 58 from rotating.

Therefore, the mounting structure of the U-shaped pin 55 to the mounting member main body 53 is such that the accommodation groove 56 and the circular recess 57 are formed from one surface of the mounting member main body 53, and the U-shaped pin 55 is held by the C-shaped snap ring 58. That is, it is extremely simplified, and the circular concave portion 57 can also form the bending region 56a of the U-shaped pin 55.

The fastening mechanism of the fifth embodiment shown in FIGS. 14 to 16 requires machining from both sides of the mounting member body 63, but U-shaped pins are used without using bolts or C-shaped retaining rings. It can be fixedly held by the mounting member main body 63. Therefore, a pin insertion groove 67 for forming a housing groove 66 for the U-shaped pin 65 that intersects the fitting insertion hole 64 of the shaft-shaped member is provided from one surface side of the main body 63 of the attachment member 62, and the pin insertion groove 67 is formed. The bulge regions 66a of the U-shaped pin 65 on both sides of the central portion,
Is formed into an elliptical shape with the engaging jaws 66b of the pin insertion groove 66b left, and the tip of the pin insertion groove 67 is formed on the other surface side of the mounting member main body 63.
The engaging jaw 66b has a depth up to where it overlaps
Of the U-shaped pin 6 along with the pin insertion groove 67.
A pair of oval auxiliary holes 68 that form the accommodation groove 66 of No. 5 are recessed.

Therefore, it is not necessary to use a bolt or the like for mounting the U-shaped pin 65 to the mounting member 62, and the mounting structure of the U-shaped pin 65 is simplified, and the mounting member 6
The molding of 2 is also facilitated.

[0026]

According to the fastening mechanism of the present invention described in detail above, when the shaft-like member is attached to the attachment member, the position and the rotation angle are regulated and the attachment / detachment can be easily performed without using a tool. Can be attached freely. Also,
Like the already proposed mechanism, there are few restrictions on the form of the mounting member for mounting the axial member, the shaft member can be applied regardless of the thickness of the shaft member, and the shaft member has a simplified structure. It is possible to obtain a fastening mechanism between the attachment member and the attachment member.

Further, in order to attach and detach the shaft-shaped member in a manner that its position and rotation angle are restricted, the recessed groove provided at the tip of the shaft-shaped member is elastically pressed and held by both legs of the U-shaped pin. Adopting a simple mechanism called "U" above
Since the structure for fixedly holding the die pin to the mounting member is simplified, the fastening mechanism can be provided at a low cost.

[Brief description of drawings]

FIG. 1 shows a configuration of a first embodiment of a fastening mechanism according to the present invention,
It is sectional drawing shown in the state which isolate | separated the shaft-shaped member and its attachment member.

FIG. 2 is a cross-sectional view at another position, showing the configuration of the embodiment with the shaft-shaped member and the mounting member thereof coupled together.

FIG. 3 is a bottom view of a mounting member in the embodiment.

FIG. 4 is a bottom view showing a state where the shaft-shaped member is fixedly attached to the mounting member in the embodiment.

FIG. 5 is an exploded perspective view of a main part of the embodiment.

FIG. 6 is a cross-sectional view showing the structure of a mounting member in a second embodiment of the fastening mechanism according to the present invention.

FIG. 7 is a bottom view of the mounting member body in the embodiment.

FIG. 8 is a bottom view showing a mounting state of the U-shaped pin of the mounting member in the embodiment.

FIG. 9 is a cross-sectional view showing the structure of a mounting member in a third embodiment of the fastening mechanism according to the present invention.

FIG. 10 is a bottom view of the mounting member in the embodiment.

FIG. 11 is a plan view showing the configuration of the pin guide used in the embodiment.

FIG. 12 is a cross-sectional view showing the structure of a mounting member in a fourth embodiment of the fastening mechanism according to the present invention.

FIG. 13 is a bottom view of a mounting member in the embodiment.

FIG. 14 is a sectional view showing the structure of a mounting member in a fifth embodiment of the fastening mechanism according to the present invention.

FIG. 15 is a cross-sectional view of a mounting member main body in the same example.

FIG. 16 is a bottom view of the mounting member in the embodiment.

FIG. 17 is a cross-sectional view showing a configuration of a fastening mechanism for a previously proposed shaft and a shaft mounting member.

FIG. 18 is a perspective view showing another configuration of a fastening mechanism of a proposed shaft and a shaft mounting member.

[Explanation of symbols]

 21 Shaft-shaped member 22, 32, 42, 52, 62 Mounting member 23, 33, 43, 53, 63 Main body 24, 34, 44, 54, 64 Fitting insertion hole 25, 35, 45, 55, 65 U-shaped pin 25a , 35a Legs 26, 36, 46, 56, 66 Housing groove 26a, 36a, 46a, 56a, 66a Deflection area 28 Tapered part 29 Recessed groove 47 Enlarged groove 48 Pin guide 49 Bolt 57 Circular recess 58 C-shaped retaining ring 66b Engagement Joint jaw 67 Pin insertion groove 68 Auxiliary hole

Claims (4)

[Claims] 1. A fastening mechanism for attaching a shaft-shaped member to a mounting member, wherein a fitting insertion hole for the shaft-shaped member is provided in a main body of the mounting member, and U which intersects with the fitting insertion hole. An accommodation groove for the die pin is provided, and an elastic U-shaped pin having both legs facing the fitting insertion hole is accommodated in the accommodation groove with flexure areas on both sides of the leg portion and fixed to the body of the mounting member. Of the U-shaped pin is provided at the distal end of the shaft-like member to push and spread both legs of the U-shaped pin, and both legs of the U-shaped pin beyond the tapered portion are elastically pressed and held. A fastening mechanism characterized in that a linear groove for fitting is provided. 2. The fastening mechanism according to claim 1, wherein a U-shaped pin accommodating groove provided in the main body of the mounting member is provided in an enlarged groove that intersects with a fitting insertion hole of a shaft-shaped member provided in the main body. A fastening mechanism, characterized in that it is formed by accommodating a pin guide having a U-shaped pin accommodating groove, and the pin guide is fixedly held together with the U-shaped pin by a bolt on the mounting member main body. 3. The fastening mechanism according to claim 1, wherein the body of the mounting member has a shaft-shaped member around the fitting hole.
A circular recess having the same depth as the accommodation groove of the U-shaped pin is provided, and a flex region of the U-shaped pin is formed by the circular recess, and a C-shaped retaining ring engaged with the inner circumference of the circular recess,
A fastening mechanism characterized in that a U-shaped pin is fixedly held by a main body of a mounting member. 4. The fastening mechanism according to claim 1, wherein a pin insertion is made from one surface side of the main body of the mounting member, leaving an engaging jaw portion of the U-shaped pin for forming a receiving groove of the U-shaped pin. A groove is provided as a recess, and an auxiliary hole reaching the inside of the engaging jaw from the other surface side of the mounting member body and forming a U-shaped pin accommodating groove together with the pin insertion groove is provided. Fastening mechanism.