JP3177870B2 - Simple fastening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple fastening device capable of one-touch insertion and tightening using a movable screw piece used for various facilities such as construction, electricity, and machinery.

[0002]

2. Description of the Related Art Conventionally, a nut that can be inserted with one touch is disclosed in Japanese Utility Model Publication No. 55-48171.

[0003]

However, in the above prior art, a plurality of different screw pieces (having different screw phases) are used, so that there is a possibility of erroneous assembling at the time of manufacturing and various types of screw pieces. There is a problem that the cost required for the die for the screw piece is increased and causes a high cost.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a simple fastening device that can be completed with only one kind of screw piece, thereby preventing erroneous assembly and reducing cost. Things.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a base having a mortar-shaped hole having a slope and a nut is formed into a divided shape obtained by dividing a nut. It is guided to expand and contract in the diametrical direction along the hole, and includes two or more screw pieces that move in the expanding direction when a bolt is inserted into the base, and a spring that biases the screw piece in the compression direction, The mortar-shaped hole is shifted in the axial direction by an amount obtained by dividing a screw pitch by the number of screw pieces, and receives the movement in the compression direction of the screw piece.

According to a second aspect of the present invention, a base having a mortar-shaped hole having two or more slopes and a nut are formed into a divided shape, so that the nut expands and contracts in the diameter direction along the mortar-shaped hole. And two or more screw pieces that are guided in the base and move in the expanding direction when the bolt is inserted into the base, and are formed so that the screw pitch is divided by the number of screw pieces and the thickness is different by the number of the screw pieces. A stepped washer to hold,
A spring for urging the screw member in the contraction direction, wherein the mortar-shaped hole of the base is provided so as to be shifted in the axial direction by an amount obtained by dividing a screw pitch by the number of screw members.

The invention according to claim 3 is the invention according to claim 2, wherein the amount of displacement of the mortar-shaped hole in the axial direction and the amount of change in the plate thickness of the stepped washer are obtained by dividing the screw pitch by the number of screw pieces. The screw phase is shifted between the screw pieces in the state of being fastened to the bolt by making the phase different from that described above.

According to a fourth aspect of the present invention, in the first or second aspect, the spring for urging the screw piece is pressed by a cap having a bolt insertion hole and attached to the base. It is characterized by being.

[0009]

According to the above construction, only one type of screw block is required, and there is no possibility of erroneous assembly. In addition, only one type of screw block is required and the cost is low.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings. 1 is a plan view of the first embodiment, FIG. 2 is a front view thereof, FIG. 3 is a sectional view taken along line JJ of FIG. 2, FIG. 4 is a sectional view taken along line KK of FIG. Is a plan view of the base, FIG. 6 is a sectional view taken along line LL of FIG. 5, FIG.
8 is a sectional view taken along the line MM of FIG. 7, and FIG. 9 is a sectional view of the stepped washer.

In the simple fastening device T 'of this embodiment,
The lower part of the base 11 is a hexagonal part 11a, and the upper part is a convex part and a circular part 11b. The base 11 is provided with a hole 11c, and the hole 11c is provided with mortar-shaped holes 11f and 11g having facing slopes 11d and 11e, respectively.
The screw pieces 12 are respectively supported in the mortar-shaped holes 11f and 11g. Here, mortar-shaped holes 11f and 11g
Is shifted in the axial direction by a half (P / 2) of a screw pitch provided in the female screw portion 12a of the screw piece 12 described later.

[0012] Mortar-shaped holes 11f and 11 of the base 11
A screw block 12 is inserted into each of the g's, and a stepped washer 13 and a spring 14 and a cap 15 for holding them are fitted on the base 11. Here, the stepped washer 13 is composed of semicircular arc portions 13a and 13b having different thicknesses, as shown in FIG. 9, and the difference in the thickness is a half of the screw pitch provided on the female screw portion 12a of the screw block 12 ( P / 2). Each screw piece 12 has a semi-donut shape obtained by dividing a nut.
2a are formed, and a mortar-shaped hole 11 of the base 11 is formed on the outside.
Arc-shaped conical portions 12b corresponding to the slopes 11d and 11e of f and 11g are provided.

The cap 15 has a cup shape with a hole, and a cylindrical portion 15a for receiving the spring 14 is formed inside the cap 15, and a bolt insertion hole 15b is formed inside the cylindrical portion 15a. A convex portion 15c is provided on the inner periphery of the lower end, and this convex portion 15c is
The cap 15 is attached to the base 11 by fitting into the concave groove b. With such a configuration, two identical screw pieces 12 are used. However, in order to correct the difference in the screw portion with respect to the bolt, the screw pitch is considered in the axial direction and the screw pitch is shifted by that amount. It can act as one female screw.

In such a simple fastening device T ',
As shown in FIGS. 10A, 10B, 10C, and 10D, the simple fastening device T 'is inserted into the bolt 5 in the E' direction. Then, as the bolt 5 moves, the screw piece 1
2 slides in the a 'and a "directions along the slopes 11d and 11e of the base 11, respectively.
Since the female screw portion 12a and the bolt 5 do not engage with each other, the simple fastening device T 'can be inserted without turning.
After inserting the simple fastening device T 'until it hits the object 6 and turning it in the direction of F' in the usual way of tightening a screw, the screw piece 12
The bolts 5 slide down in the directions b 'and b ", respectively, and engage with the bolt 5. The simple fastening device T' is removed from the bolt 5 by turning it in the direction opposite to F 'in the manner of loosening the screw. Accordingly, the simple fastening device T 'can be easily inserted into the bolt 5 without having to turn the simple fastening device T' or the bolt 5 each time.

Although the present embodiment shows an example in which there are two screw pieces, even when three or more screw pieces are used, each screw piece is inserted by an amount obtained by dividing the screw pitch by the number of screw pieces. The same can be achieved by providing the mortar-shaped hole of the base so as to be displaced in the axial direction and changing the thickness of the stepped washer.

Further, it is not possible to shift the screw piece in the axial direction or to change the thickness of the stepped washer by an amount obtained by dividing the screw pitch by the number of screw pieces, thereby acting as one female screw portion. As already mentioned, if the amount of change is slightly changed by dividing the screw pitch by the number of screw pieces, the phase of the female screw part of the screw piece will be shifted from the external thread part of the bolt after tightening to the bolt. Become. As a result, the effect of preventing loosening is exerted by the generated frictional force. This example can be cited as a modification of this embodiment.

The above-described simple fastening device is extremely convenient to use, for example, when mounting a ceiling. That is, as shown in FIG. 11, in the conventional method of mounting a ceiling, an insert (with an internal thread cut inside) 22 driven into the floor of the upper floor together with concrete 21.
The suspension bolt 23 is screwed into the
In order to attach the suspension bolts 23 to the vehicle, one and one screws must be screwed in, the installation is troublesome, and there are many places where the suspension bolts are suspended. Has become. In FIG. 11, 24 is a nut, 25 is a hanger, and 26 is a channel. However, if the simple fastening device according to the present invention is inserted, the suspension bolt can be fixed simply by inserting the suspension bolt. To remove the fixed suspension bolt, remove the suspension bolt by turning it counterclockwise in the same way as a conventional screw. This use example is shown as a simple fastening device T ″ in FIGS. 12 (a) and 12 (b).

[0018]

As described above, according to the present invention, since there is only one kind of screw piece, erroneous assembly can be reliably prevented.
In addition, the number of molds is small because the screw piece is one type,
Cost can be reduced. Further, it is possible to prevent the bolt from being loosened in the tightened state.

[Brief description of the drawings]

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

FIG. 2 is a front view of FIG.

FIG. 3 is a sectional view taken along line JJ of FIG. 2;

FIG. 4 is a sectional view taken along the line KK of FIG. 3;

FIG. 5 is a plan view of a base.

FIG. 6 is a sectional view taken along line LL of FIG. 5;

FIG. 7 is a plan view of the screw piece.

FIG. 8 is a sectional view taken along line MM in FIG. 7;

FIG. 9 is a sectional view of a stepped washer.

FIGS. 10 (a), (b), (c) and (d) are explanatory views showing how to use the simple fastening device.

FIG. 11 is an explanatory diagram showing a conventional usage example.

FIGS. 12A and 12B are a front view and a cross-sectional view for explaining a use state of an embodiment according to the present invention.

[Explanation of symbols]

 11 Base 12 Screw block 13 Stepped washer 14 Spring 15 Cap

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-133412 (JP, A) JP-A-4-8481 (JP, A) JP-A-2-209612 (JP, A) 121811 (JP, U) Japanese Utility Model 2-40113 (JP, U) Japanese Utility Model 4-90707 (JP, U) Japanese Utility Model 4-80918 (JP, U) Japanese Utility Model 62-56815 (JP, U) JP-B-55-50203 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16B 37/00 F16B 37/08

Claims (4)

(57) [Claims] 1. A base in which a mortar-shaped hole having a slope is formed, and a nut, which is formed into a divided shape,
Two or more screw pieces that are guided to expand and contract in the diameter direction along the mortar-shaped hole and move in the expanding direction when a bolt is inserted into the base, and a spring that urges the screw pieces in the compression direction. The simple fastening device according to claim 1, wherein the mortar-shaped hole receives the movement in the axial direction by shifting the screw pitch by the number of the screw pieces in the axial direction. 2. A base in which a mortar-shaped hole having two or more inclined surfaces is formed, and a nut formed by dividing the nut into divided shapes, guided along the mortar-shaped hole so as to expand and contract in a diametrical direction, and Two or more screw pieces that move in the expanding direction by being inserted into the base, and a stepped washer formed to have a thickness different by the screw pitch divided by the number of screw pieces and to hold the screw pieces. And a spring for urging the screw piece in the contracting direction, wherein the mortar-shaped hole of the base is provided so as to be shifted in the axial direction by an amount obtained by dividing the screw pitch by the number of screw pieces. Fastening device. 3. The tightening state of the bolt by making the amount of displacement of the mortar-shaped hole in the axial direction and the amount of change in the plate thickness of the stepped washer different from the value obtained by dividing the screw pitch by the number of screw pieces. 3. The simple fastening device according to claim 2, wherein the screw pieces are shifted in phase from each other. 4. The spring for urging the screw piece, which has a bolt insertion hole and is held down by a cap attached to the base.
The simple fastening device as described.