JPH11125228A - Simple fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability when a member is fastened through a male screw and it is removed from the male screw by forming a projecting part projecting from a female screw case in plural screw pieces, fitting a hole to its projecting part, and restricting a diametrically expanding directional movement of the respective screw pieces. SOLUTION: A small diameter part 2c being a projecting part is formed in one end part of a screw piece 2, and a large diameter part 2d is formed in the other end part. A small diameter part 3c being a projecting part is formed in one end part of a screw piece 3, and a large diameter part 3d is formed in the other end part. Grooves 2e and 3e are formed on outer peripheral surfaces of the large diameter parts 2d and 3d of these screw pieces 2 and 3, and an O ring 4 is integrally installed in the respective grooves 2e and 3e. The small diameter parts 2c and 3c of the respective screw pieces 2 and 3 are also fitted to a screw piece holding hole 6a having an inside diameter slightly larger than an outside diameter of the small diameter parts 2c and 3c of the respective screw pieces 2 and 3, and a diametrically expanding directional movement of the respective screw pieces 2 and 3 is checked.

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 with improved workability for easy fastening and removal.

[0002]

2. Description of the Related Art Conventionally, a simple fastening device (hereinafter, referred to as a nut) used in, for example, a construction site or a product assembly site.
Required an operation to rotate when inserting into a male screw, tightening a member through the male screw, and removing from the male screw. In particular, it is not easy to rotate the nut at a high place or a narrow place to tighten and remove the nut. For this reason, a nut disclosed in Japanese Utility Model Publication No. 55-48171 has been known as a nut which can be inserted into a male screw with one touch and which can be tightened via the male screw with improved workability. In order to remove the nut, it is necessary to rotate the nut. Furthermore, as a nut that can be inserted into the male screw with one touch, tighten the member via the male screw, and remove from the male screw,
Japanese Patent Application Laid-Open No. -50203 is known, but it is necessary to rotate the operation ring every time insertion into or removal from a male screw.

[0003]

Since the conventional simple fastening device is constructed as described above, Japanese Utility Model Publication No. Sho 55-481.
In the technology disclosed in Japanese Patent Publication No. 71, there is room for improvement in the rotation operation of the nut when removing the nut, and there has been a problem that the workability when removing the nut has not been improved.

[0004] In the technique disclosed in Japanese Patent Publication No. 55-50203, it is necessary to operate the operation ring each time the male screw is inserted into or removed from the male screw.
Further, there is a problem that the structure is complicated and the cost is high.

The present invention has been made in view of the above circumstances, and improves the workability of inserting into a male screw, tightening a member through the male screw, and removing from the male screw, thereby further simplifying the operation. It is an object of the present invention to provide a simple fastening device that can suppress an increase in cost by a structure.

[0006]

SUMMARY OF THE INVENTION A simple fastening device according to the present invention includes a plurality of screw pieces having female threads formed thereon, and the plurality of screw pieces are urged in the direction of reducing the diameter of the female screw and integrated. A screw piece integrating means to be mounted, and a plurality of screw pieces integrated by the screw piece integrating means are movably housed in a radial direction of the female screw, and a male screw screwed with the female screw of the screw piece is provided. A female screw case in which a male screw insertion hole to be inserted is formed,
A protrusion formed on each of the screw pieces and protruding from the female screw case, and a hole that fits with the protrusion is provided. By fitting the hole into the protrusion, the diameter of each of the screw pieces can be increased. And a restraining member for restraining movement.

The simple fastening device according to the present invention comprises a plurality of screw pieces on which female threads are formed, and a plurality of screw pieces for urging the plurality of screw pieces in the diameter reducing direction of the female screw and integrating them. Male means, and the plurality of screw pieces integrated by the screw piece integrating means are movably housed in the radial direction of the female screw, and the male screw into which the female screw of the screw piece is inserted is inserted. A female screw case having a screw insertion hole formed therein, and a fixed piece movably provided via an elastic body between a plurality of screw pieces housed in the female screw case and a bottom of the female screw case; The fixed piece side of the piece is formed in a conical convex part, the screw piece side of the fixed piece is formed in a conical concave part corresponding to the conical convex part of the screw piece, and the female screw case bottom side of the fixed piece is a small diameter part. And protruded outward from the female screw case bottom, The fixed piece moved by the projecting portion is pressed, the recess of the conical shape of the fixing piece, characterized in that to prevent the movement of the enlarged diameter direction of the fitting to the screw piece with the convex portion of the conical shape of the screw piece.

Further, the simple fastening device according to the present invention comprises a plurality of screw pieces having female threads formed thereon, and a plurality of screw pieces for urging the plurality of screw pieces in the diameter reducing direction of the female screw and integrating them. Male means, and the plurality of screw pieces integrated by the screw piece integrating means are movably housed in the radial direction of the female screw, and the male screw into which the female screw of the screw piece is inserted is inserted. A female screw case having a screw insertion hole formed therein, and a cover body detachably provided in the female screw case, wherein the plurality of screw pieces are movably housed between the cover member and the cover body via an elastic body. On the inner surface of the cover body, a conical recess is formed, the cover body side of the screw piece is formed as a conical protrusion corresponding to the conical recess of the cover body, and the female screw case bottom side of the screw piece has a small diameter. The small diameter part is the bottom of the female screw case The screw piece moves by being pushed outward, and the conical convex part of the screw piece fits into the conical concave part of the cover body. It is characterized by being prevented.

Further, the simple fastening device according to the present invention is characterized in that a groove formed continuously on the outer peripheral portion of each of the plurality of screw pieces and extending over each of the screw pieces, and an elastic body wound around the groove of each of the screw pieces. And a ring constituted by the screw piece integrating means.

Further, the simple fastening device according to the present invention has an elasticity which is formed on an outer peripheral surface of each of the plurality of screw pieces, and has a resilient end contacting an inner peripheral surface of the female screw case accommodating the respective screw pieces. A tongue-like member is provided with screw-piece integrating means for urging the plurality of screw pieces in the radial direction of the female screw and for integrating the screw pieces.

Further, the simple fastening device according to the present invention has an elastic tongue formed on the inner peripheral surface of the female screw case and having a distal end abutting on the outer peripheral surface of each of the plurality of screw pieces housed in the female screw case. A screw member integrating means for urging the plurality of screw members in the diameter reducing direction of the female screw and for integrating the screw members with the shape member is provided.

Further, in the simple fastening device according to the present invention, the tapered surface formed on the outer peripheral surface of the projecting portion matches the tapered surface formed on the outer peripheral surface of the projecting portion, and the inner surface of the hole of the restraining member is provided. And a hole of the restraining member is fitted to the protruding portion by the tapered surface.

Further, in the simple fastening device according to the present invention, the projecting portion-side engaging portion formed on the outer peripheral surface of the projecting portion and the inner surface of the hole of the restraining member are aligned with the projecting portion-side engaging portion. And the restraining member side locking portion is fitted to the projecting portion side locking portion, and the restraining member restrains the movement of each screw piece in the radial direction. Features.

Further, the simple fastening device according to the present invention is characterized in that the restraining member is movably locked to the female screw case, and the restraining member and the female screw case are integrated.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a structural view showing the configuration of the simple fastening device according to the first embodiment. FIG. 1A is a plan view of the simple fastening device, FIG. 1B is a front view, and FIG. Is a bottom view, (f) is a cross-sectional view showing the AA cross-sectional structure of (a), and (e) is a cross-sectional view of the screw-piece holding member. In these figures, 1 is a nut case, 2
Numerals 3 and 3 denote screw pieces having a semi-annular shape, and numeral 5 denotes a cover body.

2A and 2B are structural views showing the configuration of the nut case 1. FIG. 2A is a plan view of the nut case, FIG. 2B is a front view, FIG. 2C is a bottom view, and FIG. FIG. 4D is a cross-sectional view showing a cross-sectional structure taken along the line AA in FIG.
In these figures, reference numeral 1a denotes a slotted bottom hole which accommodates the screw pieces 2 and 3 movably in the radially expanding direction, 1b denotes a male screw insertion hole through which a male screw is inserted, and 1c denotes an integrated screw piece 2 and 3. The position of the screw hole of the female screw of the formed female screw body is formed at the bottom of the bottomed slot 1a for positioning the position of the male screw insertion hole 1b formed in the nut case 1. The positioning projections 1d are locking recesses for fitting and integrating the cover body with the nut case 1.

FIG. 3 is a structural view showing the structure of the screw pieces 2 and 3. FIG. 3A shows one of the two screw pieces constituting a female screw body having a female screw formed therein. Plan view,
FIG. 1B is a front view, and FIG. 1C is a bottom view. FIG. 3D is a plan view showing the female screw body constituted by the two screw pieces, FIG. 3E is a front view, and FIG. 3F is a bottom view. In these figures, 2b is a female screw formed on the screw block 2, 3b is a female screw formed on the screw block 3, and the female screw 2b of the screw block 2 and the female screw 3b of the screw block 3 form a set. The phase difference between the pitch of the female screw 2b of the screw block 2 and that of the female screw 3b of the screw block 3 is half the pitch. 2c is a small diameter portion formed at one end of the screw piece 2, 2d is a large diameter portion formed at the other end of the screw piece 2, and 3c is a small diameter formed at one end of the screw piece 3. The portion 3d is a large-diameter portion formed at the other end of the screw block 3.

Reference numeral 2e denotes a groove formed on the outer peripheral surface of the large diameter portion 2d formed at the other end of the screw piece 2, and 3e denotes the outer circumference of the large diameter portion 3d formed at the other end of the screw piece 3. As shown in FIG. 1D, an elastic O-ring 4, for example, is mounted in these grooves 2e and 3e, and the O-ring 4 allows the screw pieces 2 and 3 to be mounted. Are always integrated so as to be movable in the radial direction. It is also possible to use a C-ring having elasticity instead of the O-ring. 2a is a notch formed in the large diameter portion 2d formed in the other end of the screw piece 2, and 3a is a notch formed in the large diameter portion 3d formed in the other end of the screw piece 3. The notches 2a and 3a are provided with the positioning protrusions 1 shown in FIG.
c, and positions the screw holes of the female screw of the female screw body formed by integrating the screw pieces 2 and 3 with the position of the male screw insertion hole 1b formed in the nut case 1. .

FIG. 4 shows a screw case 2 on the nut case 1.
3A and 3B are structural views showing a configuration of a cover body 5 for storing the cover 3, wherein FIG. 4A is a plan view of the cover body, FIG. 4B is a front view, FIG. 4C is a bottom view, and FIG. (D) is A in FIG.
It is sectional drawing which shows the -A sectional structure. In these figures, reference numeral 5a denotes a locking projection for fitting the cover body 5 to the nut case 1 and integrating it with the nut case 1, and is fitted to a locking recess 1d of the nut case 1. Reference numeral 5b denotes a through hole through which the small diameter portions 2c and 3c of the screw pieces 2 and 3 protrude to enable the screw pieces 2 and 3 to move in the diameter increasing direction. The screw pieces 2 and 3 integrated by the O-ring 4 are housed in the bottomed elongated hole 1a of the nut case 1 and are covered by the cover body 5 fitted to the nut case 1 by the locking projections 5a. The nut case 1 is prevented from falling off.

Reference numeral 6 shown in FIG. 1 (e) denotes a screw-piece holding member, in which a screw-piece holding hole 6a having an inner diameter slightly larger than the outer diameter of the small-diameter portions 2c, 3c of the screw pieces 2, 3 is formed. ing. The screw member holding member 6 may be a member to be fastened, in which case the screw member holding hole 6a is formed in the member to be fastened.

Next, the operation will be described. FIG. 5 is an operation explanatory view showing the operation of each part of the simple fastening device. As shown in FIG. 5A, when the simple fastening device is inserted in the direction A into the bolt 51 which is a male screw, FIG. As shown in (b), the screw pieces 2 and 3 move in the radially expanding direction against the urging force of the O-ring 4. In fact, bolt 51
Each time the thread of the internal thread of the screw pieces 2 and 3 passes over the thread of the screw piece 2, the screw pieces 2 and the screw piece 3 move in the radially expanding direction shown by (a) in FIG. The movement in the diameter reduction direction shown is repeated. For this reason, by pushing in the bolt 51 from the male screw insertion hole 1b, the simple fastening device can be freely arranged at a desired position of the bolt 51 without rotating. In this state, the female screws of the screw pieces 2 and 3 are pressed against the bolts 51 by the O-rings 4, and the simple fastening device is maintained at a desired position without falling off the bolts 51. . After the simple fastening device is arranged, the screw-piece holding hole 6a of the screw-piece holding member 6 is fitted into the small-diameter portions 2c, 3c of the screw pieces 2, 3 as shown in FIG. The movement of the screw pieces 2 and 3 in the radially expanding direction is prevented, and functions as one nut.
When the screw member holding hole 6a is formed in the screw member holding member 6 or the member to be fastened as shown in FIG. 5D, the member to be fastened can be supported or tightened.

As described above, according to the first embodiment, unless the screw-piece holding hole 6a of the screw-piece holding member 6 is fitted to the small-diameter portions 2c, 3c of the screw pieces 2, 3, the bolt 51 Can be freely moved without rotating it to a desired position, so that the operability at the time of insertion into the bolt 51, fastening of the member via the bolt 51, and removal from the bolt 51 is improved, and the nut case is further improved. 1, screw pieces 2,
3, the O-ring 4, the cover body 5, and the screw-piece holding member 6, if necessary, have a simple structure composed of a total of about six parts, so that an increase in cost can be suppressed.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 6 is a structural view showing the configuration of the simple fastening device according to the second embodiment and the operation of each part. The inner peripheral surface of the screw-piece holding hole 6a of the screw-piece holding member 6 of the simple fastening device has a taper. It is configured as an attached tapered surface. Also, the outer peripheral surfaces of the small diameter portions 2c and 3c of the screw pieces 2 and 3 to be fitted into the screw piece holding hole 6a are also formed as tapered surfaces having a taper matching the tapered surface of the screw piece holding hole 6a. I have. In the simple fastening device according to the present embodiment, not only the effects of the first embodiment are obtained, but also the screws to the small diameter portions 2c, 3c of the screw pieces 2, 3 as shown in FIG. The piece holding member 6 is easily fitted, and the female screws 2b, 3b of the screw pieces 2, 3 are strongly pressed against the bolt 51 by the taper effect as shown in FIG. When the screw member holding hole 6a is formed in the member 6 or the member to be fastened, the member to be fastened can be tightened more strongly, and the effect of preventing the screw from loosening can be expected.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 7A is a structural diagram showing a configuration of the simple fastening device according to the third embodiment, and FIG.
g is an elastic tongue formed on the outer peripheral surface of the large diameter portion 2d of the screw piece 2 and 3g is an elastic tongue formed on the outer peripheral surface of the large diameter portion 3d of the screw piece 3. Department. The distal ends of the elastic tongues 2g and 3g are in contact with the inner peripheral surface of the bottomed elongated hole 1a of the nut case 1 to urge the screw pieces 2 and 3 in the diameter reducing direction of the female screw and integrally. Is becoming

As shown in FIG. 7B, the elastic tongues 1e and 1f may be formed on the inner peripheral surface of the bottomed elongated hole 1a of the nut case 1. In this case, the elastic tongue 1
The tips of e and 1f abut against the outer peripheral surfaces of the large diameter portions of the screw pieces 2 and 3 to urge the screw pieces 2 and 3 in the diameter reducing direction of the female screw and to integrate them.

In the simple fastening device according to the present embodiment, not only the effects of the first embodiment can be obtained, but also the screw pieces 2 and 3 can be moved in the diameter reducing direction of the female screw without using an O-ring or the like. Because it can be energized and integrated
This has the effect of further reducing the number of equipment and facilitating assembly.

Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a structural diagram showing the configuration of the simple fastening device according to the fourth embodiment. In this simple fastening device, the fitting recess 6 is inserted into the screw-piece holding hole 6a of the screw-piece holding member 6.
b, and fitting projections 2f, 3f are formed on the small diameter portions 2c, 3c of the screw pieces 2, 3. Then, as shown in FIG. 8A, the screw piece holding hole 6a is inserted into the small diameter portion 2 of the screw pieces 2 and 3.
By pushing them into the fitting recesses 6b, the fitting protrusions 2f, 3f are fitted into the fitting recesses 6b, thereby functioning as one nut. FIG. 2B shows this state.

In the simple fastening device of the present embodiment, the fitting recess 6 formed in the screw-piece holding hole 6a of the screw-piece holding member 6 is provided.
When the fitting projections 2f and 3f formed on the small diameter portions 2c and 3c of the screw pieces 2 and 3 are fitted to b, the screw piece holding member 6 moves from the small diameter portions 2c and 3c of the screw pieces 2 and 3. Does not easily come off, so that there is an effect that it is possible to reliably maintain a state of functioning as one nut regardless of the shape and state of the member to be fastened.

Next, a fifth embodiment will be described with reference to the drawings. FIG. 9 is a structural diagram showing the configuration of the simple fastening device according to the fifth embodiment. In this simple fastening device, the fitting concave portion 6b and the fitting convex portion 2 in the fourth embodiment are used.
f, 3f, a protrusion 6d for temporary holding is formed on the screw-piece holding member 6, and a locking portion 5b is formed at the end of the cover body 5 to engage with the protrusion 6d. The member 6 is configured to be movable along the side surfaces of the cover body 5 and the nut case 1. Then, the screw-piece holding member 6 can be temporarily held on the cover body 5 while the screw-piece holding member 6 is locked to the cover body 5 by the locking portion 5b. In addition,
In this state, as shown in FIG. 9A, the screw pieces 2 and 3 can be moved in the diameter increasing direction.

In the simple fastening device of the present embodiment, the screw-piece holding member 6 is temporarily held on the body of the simple fastening device, so that the screw-piece holding member 6 and the body of the simple fastening device can be handled as an integral body. In addition, the screw piece holding member 6 can be prevented from being lost, and can be easily carried, thereby improving workability.

Next, a sixth embodiment will be described with reference to the drawings. FIG. 13 is a structural diagram showing the configuration of the simple fastening device according to the sixth embodiment and the operation of each unit. In this simple fastening device, a fixed piece 8 that pushes the screw pieces 2 and 3 via an elastic body 7 is provided in the nut case 1. The screw pieces 2 and 3 have conical convex parts 2r and 3r, and the fixed piece 8 has a conical concave part that matches the conical convex parts 2r and 3r formed on the screw pieces 2 and 3. 8a is configured.

In this simple fastening device, when the body of the simple fastening device is moved in the direction A and the bolt 51 is pushed into the body of the simple fastening device, the screw pieces 2 against the urging force of the O-ring 4 are pressed.
3 moves in the radially expanding direction. Actually, each time the threads of the screw pieces 2 and 3 exceed the thread of the bolt 51, the screw pieces 2 and 3
13 (b) of FIG.
Since the movement in the diameter-reducing direction is repeated, it is not necessary to turn the main body of the simple fastening device only by pushing it. When the main body of the simple fastening device is pushed in the direction A, the lower end of the fixed piece 8 comes into contact with the mating member 61, the fixed piece 8 moves upward, and the conical convex portions 2r, 3r of the screw pieces 2, 3 are moved. Engages with the conical recess 8 a of the fixed piece 8. After that, the conical concave portion 8a of the fixed piece 8 prevents the screw pieces 2 and 3 from moving in the diameter-enlarging direction, functions as one nut, and can support and tighten the mating member. In addition, the conical convex portion 2
Since r and 3r are fitted into the conical recess 8a of the fixed piece 8, there is also an effect of preventing loosening.

Next, a seventh embodiment will be described with reference to the drawings. FIG. 14 is a structural diagram showing the configuration of the simple fastening device according to the seventh embodiment and the operation of each unit. In this simple fastening device, a conical recess 5 is provided in the nut case 1.
The screw pieces 2 and 3 are housed via the elastic body 7 by the cover body 5 configured with r. The screw pieces 2 and 3 are formed with conical convex portions 2r and 3r to be fitted with the conical concave portion 5r of the cover body 5.

In this simple fastening device, the simple fastening device main body is moved in the direction A in FIG. 14A, and when the bolt 51 is pushed into the simple fastening device main body, the screw piece is opposed to the urging force of the O-ring 4. 2 and 3 move in the diameter expanding direction. In practice, each time the screw threads of the screw pieces 2 and 3 exceed the screw thread of the bolt 51, the screw pieces 2 and 3 are expanded in the diameter increasing direction shown in FIG. Since the movement in the radial direction is repeated, the simple fastening device main body can be mounted on the bolt 51 only by pushing it in, and there is no need to rotate it. When the simple fastening device body is pushed in the direction A shown in FIG. 14, the lower ends of the screw pieces 2 and 3 abut against the mating member 61, and the screw pieces 2 and 3 move upward.
Conical convex portions 2r and 3r of screw pieces 2 and 3, cover body 5
With the conical concave portion 5r. Then, cover body 5
The conical concave portion 5r prevents the screw pieces 2 and 3 from moving in the diameter-enlarging direction and functions as one nut, and can support and tighten the mating member 61. This example also has the effect of preventing loosening.

FIGS. 10, 11, and 12 are explanatory views showing examples of applications of the simple fastening device of each embodiment described above. To mount a fluorescent lamp, a bolt 51 fixed to the back of the ceiling (floor on the floor) as shown in FIG.
Through the hole in the frame 50 of the fluorescent lamp,
This is the operation procedure for fixing the fluorescent lamp using. in this case,
Since the operation of turning the nut 52 is troublesome and the operation is performed at a high place, there is a problem in safety. When the simple fastening device of each embodiment described above is used in such a work, the hole of the frame 50 of the fluorescent lamp is formed as a screw-piece holding hole, so that the bolt 51 has the screw-piece holding hole. The mounting of the fluorescent lamp is completed only by fitting the holes of the fluorescent lamp frame 50 through the holes of the fluorescent lamp frame 50 and the small diameter portions 2c, 3c of the screw pieces 2, 3 of the simple fastening device body. When fine adjustment of the height of the fluorescent lamp is performed in this state, the height is adjusted by rotating the main body of the simple fastening device.

In order to mount the ceiling, conventionally, as shown in FIG.
As shown in FIG. 1, a hanger 53 for supporting the ceiling is attached to a bolt 51 fixed to the back of the ceiling (floor on the floor) as a precedent stage, and a hole for fixing the hanger 53 is attached to the bolt 51 in the same manner as the fluorescent lamp. It is fixed with a through nut 52,
Rotating the nut 52 is troublesome for planting leaves, and there is also a problem in terms of safety due to work at a high place. In the case of using the simple fastening device of each embodiment described above in such a work, the fixing hole of the hanger 53 is a screw-piece holding hole, so that the fixing hole of the hanger 53 is After passing, the simple fastening device main body is passed through the bolt 51, and the fixing holes of the hanger 53 are fitted into the small diameter portions 2c, 3c of the screw pieces 2, 3 to complete the mounting of the hanger 53. The fine adjustment of the height of the hanger 53 is performed by turning the main body of the simple fastening device.

As shown in FIG. 12, the drain pipe is connected to a bolt 51 standing upright from the floor by using a band 55 and a nut 52 for supporting the drain pipe 54. Since the installation takes into account the gradient, the height must be adjusted by turning the nut 52,
This is an extremely laborious task. When the simple fastening device of each of the embodiments described above is used in such an operation, the fixing hole of the band 55 is formed as a screw-piece holding hole, so that the main body of the simple fastening device is passed through the bolt 52 and the height thereof is increased. Is adjusted, the fixing holes of the band 55 are passed through the bolts 52, and the small diameter portions 2c, 3c of the screw pieces 2, 3 of the simple fastening device main body.
By simply fitting the fixing holes of the band 55 to the
5 is completed. Fine adjustment of the gradient of the drain pipe 54 can be performed by turning the main body of the simple fastening device. In addition to the above-mentioned applications, there are a wide range of applications such as supporting electric wiring behind the ceiling and attaching ducts.

[0038]

As described above, according to the present invention, a screw-piece integrating means for urging a plurality of screw pieces on which female threads are formed in the direction of reducing the diameter of the female screw and integrating the screw pieces, A female screw case in which a male screw insertion hole through which a male screw to be screwed with a female screw of the screw piece is housed such that the plurality of formed screw pieces are movable in the radial direction of the female screw, A protrusion formed on each screw piece and projecting from the female screw case, and a hole that fits with the protrusion, and the hole is fitted into the protrusion to move each screw piece in the radially expanding direction. When the male screw is pushed into the male screw insertion hole, the plurality of screw pieces move in the radial direction of the female screw so that the male screw can freely move to a desired position. When the holes of the restraining member are fitted into the protruding portions, Since the movement of the piece in the radial direction is restricted and each of the screw pieces functions as one female screw body, work for insertion into the male screw, fastening of the member via the male screw, and removal from the male screw This has the effect that the cost can be suppressed by a simple structure.

Further, according to the present invention, an elastic tongue-shaped member formed on the outer peripheral surface of each of the plurality of screw pieces and having a distal end abutting on the inner peripheral surface of the female screw case accommodating each of the screw pieces. Thus, the structure for urging the plurality of screw pieces in the direction of reducing the diameter of the female screw is provided as screw piece integrating means, so that assembling becomes easy and the number of parts is reduced, so that an effect of suppressing an increase in cost can be obtained. is there.

Further, according to the present invention, the structure is provided in which the locking member side locking portion of the restraining member is fitted to the projecting portion side locking portion and the movement of each screw piece in the diameter increasing direction is restrained. When the restraining member-side locking portion of the restraining member is fitted to the protruding portion-side locking portion, the movement of each of the screw pieces in the diameter increasing direction is reliably restrained, and each of the screw pieces functions as one female screw body. Thus, the member can be securely tightened via the male screw, and there is an effect of preventing loosening.

Further, according to the present invention, since the restraining member and the female screw case are integrated, the loss of the restraining member during work can be prevented, and the portable device can be easily carried. This has the effect of improving the workability when the member is tightened and removed from the male screw.

[Brief description of the drawings]

FIG. 1 is a structural diagram showing a configuration of a simple fastening device according to a first embodiment of the present invention.

FIG. 2 is a structural diagram showing a configuration of a nut case of the simple fastening device according to the first embodiment of the present invention.

FIG. 3 is a structural diagram showing a configuration of a screw piece of the simple fastening device according to the first embodiment of the present invention.

FIG. 4 is a structural diagram showing a configuration of a cover body for storing a screw piece in a nut case of the simple fastening device according to the first embodiment of the present invention.

FIG. 5 is an operation explanatory view showing the operation of each part of the simple fastening device according to the first embodiment of the present invention.

FIG. 6 is a structural diagram showing a configuration of a simple fastening device according to a second embodiment of the present invention and an operation of each unit.

FIG. 7 is a structural diagram showing a configuration of a simple fastening device according to a third embodiment of the present invention.

FIG. 8 is a structural diagram showing a configuration of a simple fastening device according to a fourth embodiment of the present invention.

FIG. 9 is a structural diagram showing a configuration of a simple fastening device according to a fifth embodiment of the present invention.

FIG. 10 is an explanatory diagram showing an application example of the simple fastening device according to the embodiment of the present invention.

FIG. 11 is an explanatory diagram showing an application example of the simple fastening device according to the embodiment of the present invention.

FIG. 12 is an explanatory diagram showing an application example of the simple fastening device according to the embodiment of the present invention.

FIG. 13 is a structural diagram showing a configuration of a simple fastening device according to a sixth embodiment of the present invention and an operation of each unit.

FIG. 14 is a structural diagram showing a configuration of a simple fastening device according to a seventh embodiment of the present invention and the operation of each unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nut case (female screw case) 1b Male screw insertion hole 1f, 1e Elastic tongue member 2, 3 Screw piece 2c, 3c Small diameter part (projection part) 2e, 3e Groove (Screw piece integration means) 2g, 3g Elastic tongue shape Member 2f, 3f Fitting convex part (projecting part side locking part) 4 O-ring (screw piece integration means) 5 Cover body (female screw case) 6 Screw piece holding member (restraining member) 6b Fitting concave part (restraining member side) Locking part)

Claims (9)

[Claims] A plurality of screw pieces on which a female screw is formed; screw piece integrating means for urging and integrating the plurality of screw pieces in a diameter reducing direction of the female screw; A female screw case in which the plurality of screw pieces integrated by the means are movably housed in the radial direction of the female screw, and a male screw insertion hole into which a male screw screwed with the female screw of the screw piece is inserted. A protrusion formed on each of the screw pieces and protruding from the female screw case; and a hole fitted with the protrusion, and the diameter of each of the screw pieces is increased by fitting the hole into the protrusion. A simple fastening device comprising a restraining member for restraining movement in a direction. 2. A plurality of screw pieces on which a female screw is formed; screw piece integrating means for urging the plurality of screw pieces in the diameter reducing direction of the female screw and integrating the screw pieces; A female screw case in which the plurality of screw pieces integrated by the means are movably housed in the radial direction of the female screw, and a male screw insertion hole into which a male screw screwed with the female screw of the screw piece is inserted. And a fixed piece movably provided via an elastic body between the plurality of screw pieces stored in the female screw case and the female screw case bottom, and the fixed piece side of the screw piece has a conical shape. Formed on the convex part,
The screw piece side of the fixed piece is formed in a conical concave portion corresponding to the conical convex part of the screw piece, and the female screw case bottom side of the fixed piece is a small-diameter portion and protrudes outward from the female screw case bottom. Is pressed, the fixed piece moves, and the conical concave portion of the fixed piece fits into the conical convex portion of the screw piece to prevent the screw piece from moving in the radially expanding direction. 3. A plurality of screw pieces on which a female screw is formed; screw piece integrating means for urging the plurality of screw pieces in a direction in which the female screw is reduced in diameter and integrating the screw pieces; A female screw case in which the plurality of screw pieces integrated by the means are movably housed in the radial direction of the female screw, and a male screw insertion hole into which a male screw screwed with the female screw of the screw piece is inserted. And a cover body detachably provided in the female screw case, wherein the plurality of screw pieces are movably housed between the cover body and the cover body via an elastic body, and the inner surface of the cover body has a cone. A concave part having a shape is formed, the cover body side of the screw piece is formed as a conical convex part corresponding to the conical concave part of the cover body, and the female screw case bottom side of the screw piece has a small diameter part, and the small diameter part is a female part. It protrudes outward from the bottom of the screw case. Screw piece is moved by being pressed, the convex portion of the conical shape of the screw piece is fitted into the recess of the conical shape of the cover member,
A simple fastening device wherein movement of a screw piece in a radially expanding direction is prevented. 4. The screw piece integrating means includes a groove formed continuously on the outer peripheral portion of each of the plurality of screw pieces and extending over each screw piece, and an elastic body wound around the groove of each screw piece. And a ring configured.
Or the simple fastening device according to 3. 5. The resilient tongue formed on an outer peripheral surface of each of the plurality of screw pieces, and having a distal end abutting on an inner peripheral surface of a female screw case accommodating the respective screw pieces. The simple fastening device according to claim 1, 2 or 3, wherein the plurality of screw pieces are urged and integrated in a diameter reducing direction of the female screw by a shape member. 6. The resilient tongue formed on the inner peripheral surface of the female screw case and having a distal end abutting on the outer peripheral surface of each of the plurality of screw pieces housed in the female screw case. 4. The simple fastening device according to claim 1, wherein the plurality of screw pieces are urged and integrated by a member in a direction in which the female screw is reduced in diameter. 7. A tapered surface formed on an outer peripheral surface of the projection and a tapered surface formed on an inner surface of a hole of the restraining member, the tapered surface being coincident with a tapered surface formed on an outer peripheral surface of the projection. The simple fastening device according to any one of claims 1 to 6, wherein a hole of the restraint member is fitted to the protrusion at the tapered surface. 8. A protruding portion-side locking portion formed on an outer peripheral surface of the protruding portion, and a restricting member-side locking portion formed on an inner surface of a hole of the restricting member and matching the protruding portion-side locking portion. The restraining member-side locking portion of the restraining member is fitted to the protruding portion-side locking portion, and the movement of each screw piece in the radially expanding direction is restrained. The simple fastening device according to claim 6. 9. The simple fastening device according to claim 8, wherein the restraining member is movably locked to the female screw case, and the restraining member and the female screw case are integrated.