JP3057476B2 - Speed nut - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed nut capable of easily and quickly fastening a plurality of members to be fastened by a slight screwing operation with a bolt.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 5 and 6, a bolt is fastened to a nut by a simple screwing operation. As shown in the figure, these nuts form a tapered inner peripheral wall portion c whose inside diameter decreases toward the bolt insertion hole b inside the bolt insertion hole b penetrating through the upper portion of the case a. A plurality of split nuts f, f provided with a tapered outer surface d along the inner peripheral wall portion c and a screw-shaped uneven portion e formed on the center hole wall.
‥‥‥ is prepared and urged by an elastic body g disposed in the case a so as to contact the tapered inner peripheral wall c. In the same figure, h
Indicates a bolt, and i and j indicate respective members to be fastened.

[0003]

However, like the above-mentioned conventional nut, the inner peripheral wall c of the case a and the outer surface d of the plurality of split nuts f, f # have their respective tapered portions aligned. And each of the split nuts f, f ‥
The screw-shaped uneven portion e in the central hole wall of ‥‥ at the same pitch, and do not have to be formed in correspondence with pitch in the screw portion h ₁ of the bolt h, machining on cumbersome and time, high machining accuracy In addition, an elastic body such as a spring that supports the nut is indispensable, and the number of parts increases, which not only complicates the structure and increases the manufacturing cost, but also increases the overall Since the length in the direction becomes long, there is a problem that the nut protrudes long from the surface of the material to be fastened to the outside.

The present invention has been made in view of the above-mentioned problems of the prior art, and has been made in such a manner that it can be easily screwed with a bolt. It is an object of the present invention to provide a simple and inexpensive material which can be used for fastening a thin member to be fastened and which can be shortened in the axial direction and can be used for fastening a thin member to be fastened.

[0005]

According to the present invention, in order to achieve the above-mentioned object, according to the first aspect, an inner outer periphery of a bolt insertion hole having a bottom cover for supporting a nut and penetrating at the center of the upper end. The nut receiving portion formed on the top wall of the internal hole is inclined down from one side to the other side at a required angle with respect to the axis, and is fitted to one member to be fastened. With the fixing member, the outer diameter is larger than the inner diameter of the bolt insertion hole, and at the center,
A screw hole whose inner diameter is slightly larger than the outer diameter of the screw portion of the bolt is formed to penetrate, and in the internal hole of the fixing member, the nut is not rotated around the axis and tilted with respect to the tilt direction of the nut receiving portion. A nut disposed so as to be freely disposed, and an elastic body such as rubber, synthetic resin or the like protruding in the radial direction from the screw thread is fixedly provided on one side of the screw portion of the bolt or the screw hole of the nut, A speed nut is provided in which the nut in an inclined state is screwed by the screw of the bolt, and the nut is screwed by the thread of the elastic body and the nut to be able to press against the inclined nut receiving portion. It is assumed that.

According to a second aspect of the present invention, there is provided a speed nut having a bottom cover for supporting a nut, and a top end of the inner hole at a center of an upper end of the bolt insertion hole. A nut receiving part formed on the wall is inclined down from one side to another side at a required angle with respect to the axis, and a fixing member fitted to one member to be fastened, and an outer diameter of A circular hole whose inner diameter is slightly larger than the outer diameter of the screw portion of the bolt is formed through the center of the bolt insertion hole, and a circular hole is formed at the center thereof. A nut disposed so as to be tiltable with respect to the direction of inclination of the nut receiving portion, and an elastic body such as rubber, synthetic resin, or the like is provided on one side of the circular hole of the nut. Protrude radially from the inner peripheral surface of the hole and fix it securely. By turning, the nut in an inclined state is screwed through the elastic body and the inner peripheral surface of the circular hole of the nut and screwed forward, so that the nut can be pressed against the inclined nut receiving portion. It has contents.

[0007]

According to the speed nut of the first aspect,
The fixing member is driven and fixed in a recess formed in advance in one of the members to be fastened, and the other member to be fastened is overlapped on the side of the member to which the fixing member is driven. In the stacked state, a bolt is inserted into a bolt insertion hole at the upper end of the fixing member from a bolt insertion hole previously penetrating the member to be fastened.

In the present embodiment, the tip of the screw portion of the bolt is inserted into the screw hole of the nut in the fixing member, and in this embodiment, the elastic body fixed to one side inside the screw hole and the screw portion And the one side of the front end of the bolt abuts, and the bolt is no longer inserted in the axial direction and stops.

In this state, when the bolt is screwed in the tightening direction, the elastic body is fixed in a protruding state into the screw hole of the nut, so that one side of the screw portion of the bolt is forcibly bitten by the elastic body. It is engaged. For this reason, by further screwing the bolt in the tightening direction, the nut goes up along the screw portion, and one side of the upper end surface is at the lower end of the nut receiving portion at the top of the internal hole of the fixing member. At the end, one side elevation of the nut is prevented.

Further, as the bolts are tightened, a lifting force is applied to the nut. However, since the nut receiving portion is inclined, only the other side of the nut rises,
It will be inclined with respect to the axis. This allows
In the screw hole of the nut, the upper part position of the elastic body,
The thread at the lower end on the side facing the elastic body is engaged with the thread of the bolt, and the nut and the bolt are screwed firmly to fasten the two fastened members. On this occasion,
Even when the elastic body is not a nut but a screw portion of a bolt and is fixed so as to protrude from the screw thread, the same operation as described above is performed.

Next, in the speed nut according to the second aspect, a nut having a screw hole is used in the first aspect, but a circular hole is provided instead of the screw hole. The operation before the fastening in the final stage described in claim 1 is substantially the same as that before the fastening, but after the bolt is screwed in the tightening direction. Will be different as follows.

That is, by the screwing of the bolt, one side of the screw portion of the bolt is cut into the elastic body and screwed and screwed, whereby the nut rises along the screw portion of the bolt. , One side of the upper end surface abuts on the lower end of the nut receiving portion. When the bolt is further tightened from this state, the nut is in an inclined state, as apparent from the instruction of claim 1, and the bolt screw is inserted into the inner peripheral surface of the circular hole at the lower end on the side facing the elastic body. The part is cut,
As a result, thread cutting is performed, so that the bolt is securely screwed to the nut.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to FIGS. 1 and 4 showing a procedure for screwing a bolt, and an embodiment shown in FIG. 2 which is a sectional view taken along line AA in FIG. , Fixing member 1
Is hollow with metal or hard plastic, etc.
Further, on the outer peripheral surface, there is provided a retaining portion 2 formed by, for example, providing a number of annular protrusions having a substantially saw-tooth shape in longitudinal section at a predetermined interval in the axial direction, and being fastened in a stacked state. One of the members to be fastened 3
Is fixed by driving it into the recessed portion 5.

The fixing member 1 has a bottom lid 8 for supporting a nut 7 described below at a lower end portion of the inner hole 6.
In the illustrated example, this is formed in a ring shape, and a bolt insertion hole 9 is made smaller in diameter than the internal hole 6 at the center of the upper end and communicates coaxially.

In the fixing member 1, a nut receiving portion 10 is provided on an inner periphery of the bolt insertion hole 9 and on a top wall of the internal hole 6 with respect to an axis A of the fixing member 1. At an angle α from one side toward the other side.

A nut 7 is placed on the bottom cover 8 and in the internal hole 6 of the fixing member 1. The nut 7 is formed such that its outer diameter is smaller than the inner diameter of the inner hole 6 by a required dimension, and in the case of claim 1, as shown in FIG. On the other hand, in the case of claim 2, a circular hole 15 is formed at the center of the screw hole 11 as shown in FIG.

The inner diameter B of the screw hole 11 and the circular hole 15
Is set slightly larger than the outer diameter C of the screw portion 12 a of the bolt 12. As a result, as shown in FIG. 1, when the nut 7 is orthogonal to the bolt 12, the screw portion 12 a of the bolt 12 is It can be inserted, and the same applies to the case of the circular hole 15.

As shown in FIGS. 1 to 4, the nut 7 has an elastic body 13 made of rubber, synthetic resin, or the like, which is vertically provided on one side of the inner periphery of the screw hole 11 or the circular hole 15. The elastic body 13 is provided with a concave portion 14 on one side of the inner periphery of the screw hole 11 as shown in the illustrated example, and is fitted and fixed thereto.
An unillustrated screw thread can be adhesively fixed to a flat portion (not shown) formed by cutting out the screw thread, and in any case, the screw thread of the screw hole 11 or the inner side of the circumferential surface of the circular hole 15. It is fixed so as to protrude by the required length toward.

Further, as shown in FIG. 2, the nut 7 has cutout portions 7a, 7a, 6a, 6a at the front and rear sides of the outer peripheral surface and at the front and rear sides of the inner peripheral surface of the internal hole 6. The nut receiving portion 10 is arranged so as to be non-rotatable in the direction around the axis and tiltable in the tilt direction of the nut receiving portion 10 by being provided opposite to each other. The elastic body 13 of the nut 7 is connected to the nut receiving portion 10 as shown in the figure.
Is fixedly installed on the ascending side of the vehicle.

The tip 12b of the screw portion 12a of the bolt 12 is formed in a truncated conical shape with a substantially inverted front as shown in the figure, and the screw portion 12a is formed into the screw hole 11 or the circular hole 15 of the nut 7. The screw portion 12a is easily bite into the elastic body 13 so as to be easily inserted into the elastic member 13. Further, the nut 7 has a length such that the distal end portion 12b of the screw portion 12a does not protrude downward from the lower end of the fixing member 1 as shown in FIG.

In order to fasten the two members 3 and 4 using the speed nut having the above structure, the fixing member 1 must be
Driving is fixed in the recess 5 of the member 3 to be fastened,
If the other member to be fastened 4 is superposed on the member to be fastened 3 to form a stacked state, the screw portion 12a of the bolt 12
Is inserted into the bolt insertion hole 9 of the fixing member 1 from the bolt insertion hole 15 that has been inserted into the member 4 to be fastened.
As a result, the distal end portion 12b of the screw portion 12a is inserted into the screw hole 11 or the circular hole 15 of the nut 7 held in a vertical state, and finally strikes the inside of the upper end of the elastic body 13; The screw hole 11 cannot be inserted.

Here, when the bolt 12 is turned in the tightening direction, the thread of the thread portion 12a is bitten by the elastic body 13 so that the thread is cut off, and both are engaged.
As a result, one side of the nut 7 where the elastic body 13 is fixed is raised by screwing along the screw portion 12a,
The nut 7 is inclined by a required angle with respect to the axis A as shown in FIG. 4 from the vertical state of FIG. 1, and the screw hole 12 a of the nut 7 is
When the upper part of the elastic body 13 and the lower part on the other side on a diagonal line with the elastic body 13 are engaged with each other, and the circular hole 15 is Is in contact with the lower part described above.

When the bolt 12 is further rotated in the tightening direction from the above state, the above-described portion of the screw hole 11 and the elastic body 13 are engaged with the screw portion 12a, Further, the screw portion 12a cuts the threaded portion of the circular hole 15 so as to advance, so that the nut 7
Rises along the screw portion 12a while being inclined, and the nut 7
One side of the upper end face of the
4, the bolt 12 and the nut 7 are screwed together, as shown in FIG.
Both fastening members 3, 4 can be fastened.

In the state where the members 3 and 4 are fastened in this manner, the nut 7 is firmly screwed to the screw portion 12a of the bolt 12 in an inclined state. Since the elastic body 13 is also in a biting state, the screwing between the bolt 12 and the nut 7 is not loosened by the reaction force of the elastic body 13.

In the first embodiment, the elastic member 13 is fixed to one side of the inner periphery of the screw hole 11 of the nut 7. ,
It is also possible to fix the elastic body 13 on one side of the outer periphery. On the other hand, in the case of claim 2, the elastic body 13 must be provided not on the bolt 12 but on the nut 7. Must.

[0026]

According to the present invention, the bolt is slightly rotated after the bolt is inserted into the insertion hole in any of the first and second aspects. Not only can it be easily screwed to the bolt, but also because the elastic body such as a spring for urging and pushing up the nut is not used unlike the conventional example, the axial length can be made large. An elastic body made of rubber or the like for meshing is fixed to one side of the inner periphery of the screw hole of the nut or one side of the outer periphery of the screw part of the bolt while being shortened, which is convenient for fastening a thin member to be fastened. Thereby, a high machining accuracy is not required for the screw hole diameter of the screw portion, and the nut receiving portion of the fixing member can be machined without any accuracy at an arbitrary inclination angle, and the number of parts can be reduced. Is also concise, so offered at a low price Door can be.

Further, the nut is firmly screwed in an inclined state with respect to the screw portion of the bolt, and the screw portion bites into the elastic body so that the bolt and the nut are hardly loosened by the reaction force. Although it can be ensured, in claim 2, since the screw portion of the bolt also cuts the circular hole of the nut, a force is required for the operation. The anti-loosening effect is superior to that of the first aspect.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a speed nut according to a first embodiment of the present invention, in a state before fastening a material to be fastened.

FIG. 2 is a cross-sectional view taken along line AA in FIG.

3A is a vertical sectional front view showing a nut according to the embodiment, and FIG. 3B is a longitudinal sectional front view showing a nut used in the speed nut according to the second embodiment.

FIG. 4 is a longitudinal sectional front view showing a state where the fastening of the member to be fastened is completed, showing the embodiment.

FIG. 5 is a longitudinal sectional front view showing a conventional nut in use.

FIG. 6 is a longitudinal sectional front view of a used state showing another conventional nut.

[Explanation of symbols]

 Reference Signs List 1 fixing member 3 member to be fastened 4 member to be fastened 6 internal hole 7 nut 8 bottom cover 9 bolt insertion hole 10 nut receiving portion 11 screw hole 12 bolt 12a screw portion 13 elastic body 15 circular hole A axis core B inner diameter C Outer diameter

Claims (2)

(57) [Claims] 1. A nut receiving portion having a bottom cover for supporting a nut and being formed on a top wall of the inner hole at an inner periphery of a bolt insertion hole penetrating at the center of an upper end, is required with respect to an axis. At one angle, the inclined member descends from one side to the other side and is fixed to the one member to be fastened, and the outer diameter is larger than the inner diameter of the bolt insertion hole, and the inner diameter is the center of the bolt. A screw hole slightly larger than the outer diameter of the screw portion is formed so as to penetrate, and is not rotated around the axis in the internal hole of the fixing member so that it can be tilted with respect to the tilt direction of the nut receiving portion. An elastic body such as rubber or synthetic resin is fixed to one side of the screw portion of the bolt or the screw hole of the nut so as to protrude radially from the screw thread, and is fixed to the screw portion of the bolt. The nut which is tilted by the screwing is screwed between the elastic body and the nut. A speed nut which can be screwed forward and pressed against said inclined nut receiving portion. 2. A nut receiving portion having a bottom cover for supporting a nut and being formed on a top wall of the inner hole at an inner periphery of a bolt insertion hole penetrating at a center of an upper end, is required with respect to an axis. At one angle, the inclined member descends from one side to the other side and is fixed to the one member to be fastened, and the outer diameter is larger than the inner diameter of the bolt insertion hole, and the inner diameter is the center of the bolt. A circular hole slightly larger than the outer diameter of the screw portion is formed to penetrate, and is not rotated around the axis in the internal hole of the fixing member so that it can be tilted with respect to the tilt direction of the nut receiving portion. And a nut arranged, on one side of the circular hole of the nut, an elastic body such as rubber, synthetic resin or the like is fixed by protruding in the radial direction from the inner peripheral surface of the circular hole. The nut in an inclined state due to the screwing of the bolt, the elastic body and the circular shape of the nut A speed nut, characterized in that the nut can be pressed against the inclined nut receiving portion by screwing and screwing an inner peripheral surface of the hole.