JPH0663308U - Fastening bolt device - Google Patents

Abstract

(57) [Summary] [Purpose] A fastening bolt device that is self-supported at a fastening portion even when opened, and facilitates attachment and detachment of the fastening bolt when necessary. [Structure] Through holes aligned with the abutting fastening portions are respectively formed, and a tubular holding body in which an inner tube cavity and the through hole are concentrically continuous is erected and fixed in one of the through holes. A nut is attached and fixed to the other through hole. In a fastening bolt device in which a bolt having a male screw portion is held in a tube cavity of a holding body, and a biasing force is applied below a head of the bolt via a receiving seat, A locking portion protruding from the outer peripheral surface is formed on the shank portion between the screw portion and the head portion, and a disc-shaped stopper lid body is formed on the shank portion between the locking portion and the receiving seat. It is characterized in that it is slidably mounted and attached detachably to the open end side of the holding body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fastening mechanism that fastens plate-like members that are overlapped with each other by a bolt that penetrates a fastening portion and a nut that is screwed into the bolt, and particularly a fastening bolt device that is self-supported at the fastening portion even when opened. Regarding

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, in order to fasten a formwork, it is generally performed by using a bolt / nut mechanism arranged at a flange-shaped fastening portion thereof. In such a fastening device, various mechanisms have been proposed for the purpose of improving work efficiency, in which the bolts and nuts are placed at the fastening portions while being self-supporting even when they are opened.

For example, the utility model application publication, Heisei 2-31708, has already been proposed. The device disclosed in this publication constitutes a mechanism whose longitudinal sectional view is shown in FIG. That is, aligned through holes 51a and 51b are respectively formed in the flange-shaped fastening portions 50a and 50b that are arranged in contact with each other, and one of the through holes 51a is opposite to the contact surface side 50u (in the drawing). , A tubular holding body 52 that is concentrically continuous with the inner tubular sinus 52h is vertically fixed. Further, a nut 53, which is concentrically continuous with the female screw hole 53h, is attached to the opposite contact surface side 50d (located on the lower side in the drawing) of the other through hole 51b.

In this connection, the nut 53 may be directly welded to the opposite contact surface side 50d of the lower fastening portion 50b (in the drawing), but in consideration of the attachment / detachment of the nut 53, the nut 53 is attached to the nut 53. A hexagonal cylindrical nut holder 54 that is aligned and fitted is welded and fixed, and the nut 53 is held in the nut holder 54. Then, in the tube cavity 52h of the holding body 52, a fastening bolt 56 having a male screw portion 56a formed toward the tip thereof (downward in the drawing) is held so that the penetrating item 51 can be inserted. ing. A ring-shaped receiving seat 57 is slidably mounted between the head portion 56h of the bolt 56 and the male screw portion 56a, that is, the shank portion 56b. A coil-like spring 58 is mounted as an urging means in an annular manner between the receiving seat 57 and the step portion 52a of the holding body 52, and the urging force of the spring 58 is applied to the receiving seat. It is added in the direction of expanding the distance between 57 and the fastening portion 50a.

Further, a stopper ring 59 is fitted and attached to the inner peripheral wall of the upper open end 52e of the tube cavity 52h of the holding body 52. The stopper ring 59 is engaged with the annular convex portion 56c formed at the boundary between the male portion 56a and the shank portion 56b to prevent the bolt 56 from being pulled out by the elastic force of the spring 58. I'm told.

With the above-described structure, the conventional apparatus is fastened by fitting the rotation driving means (not shown) such as a nut runner to the hexagonal column head portion 56h and bending the spring 58 to compress the bolt 56. The male threaded portion 56a is inserted into the through hole 51 and screwed into the female threaded hole 53h of the nut 53. On the contrary, when the fastening is released, the bolt 56 may be rotated in the opposite direction (counterclockwise). The released bolt 56 is moved upward by the elastic force of the spring 58, and by the balance between this elastic force and the locking force of the stopper ring 59, the bolt 56 is held substantially vertically in the holding body 52. It will be.

[0007]

[Problems to be solved by the device]

 However, the configuration of the fastening mechanism having the above configuration has a problem in attaching and detaching the fastening bolt 56. That is, the stopper ring 59 is attached by elastically expanding the diameter of the stopper ring 59 whose diameter has been reduced and contracted into the annular recess 60 formed on the inner wall of the tube cavity 52h before inserting the bolt 56. It is installed as if it were done. Then, by inserting the bolt 56 into the tube cavity 52h and rotating it, the stopper ring 59 is screwed into the thread groove of the male screw portion 56, and is further press-fitted and rotated to get over the annular convex portion so that the bolt body portion The method of moving to 56b was adopted.

Next, the bolt 56 can be removed from the holding body 52 by inserting a thin rod-shaped tool or the like from the gap 60 between the upper open edge of the tube cavity 52h of the holding body 52 and the bolt 56. This is performed so that the engagement between the stopper ring 59 and the annular convex portion 56c is released. The insertion of the tool into the gap 60 is performed by passing it between the springs 58, which is a troublesome work. In fact, foreign matter is clogged in the gap 60, which is very difficult. .

The bolt 56 that repeats such fastening and releasing has a higher frequency of breakage or wear than other components such as a pitch break, and it is highly necessary to replace it. Therefore, the workability at the time of replacement was an important issue. Therefore, the present invention has been made in view of these problems, and an object thereof is to provide a fastening bolt device that can easily separate and open the holding body and the fastening bolt.

[0010]

[Means for Solving the Problems]

 In order to achieve the above object, the fastening bolt device of the present invention is configured as follows. That is, a fastening bolt device that fastens plate-shaped members that are superposed on each other by a bolt that penetrates the fastening portion and a nut that is screwed into the bolt, and through holes that are aligned with the fastening portions that abut each other are provided. A tubular holding body in which the inner tube and the through hole are concentrically continuous is fixedly erected on the opposite contact surface side of the one through hole, and the opposite contact surface of the other through hole is provided. On the side, a nut in which a female screw hole and the through hole are concentrically continuous is attached and fixed, and in the tube cavity of the holding body, a bolt having a male screw portion at the tip is attached to the through hole. And a fastening bolt having a biasing means having an expanding force is disposed below the head of the bolt through a ring-shaped receiving seat to the fastening portion. In the device, a shank between the male thread and the head of the bolt Has a locking part protruding from the outer peripheral surface, and a disc-shaped stopper lid is mounted on the shank part so as to be slidable between the locking part and the receiving seat. In addition, it is characterized in that it is detachably attached to the open end side of the holding body.

Further, the locking portion is characterized by being detachable. Further, the stopper lid may be screwed onto the inner wall of the tube cavity at the open end of the holder, or may be fitted to the outer peripheral wall of the open end of the holder.

[0012]

【Example】

 Next, a specific embodiment of the fastening device according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a vertical sectional view showing the present embodiment, and FIG. 2 is a disassembled perspective view showing the present embodiment in an exploded manner.

In the description of the present embodiment, parts having the same configurations as those of the above-described conventional example are designated by the same reference numerals, and the description of the configuration will be omitted. The fastening bolt 1 includes a head portion 2 formed in a single letter shape, a male screw portion 3 engraved from the middle to the lower end portion, and a smooth portion between the male screw portion 3 and the head portion 2. It is composed of a shank portion 4 formed on the outer peripheral surface. In addition, an annular recess 5 is formed in the shank portion at a position above the upper end of the male screw portion 3 by a certain length so as to wind the outer periphery, and the annular recess 5 is expanded by elasticity. An annular locking ring 6 is fitted and annularly mounted.

Further, the shank portion 4 of the bolt 1 is circularly mounted with a disc ring-shaped receiving seat 57 similar to the conventional example. In addition, between the receiving seat 57 and the locking ring 6, a disc-shaped stopper lid 7 is slidably mounted by penetrating the central opening 7h of the shank portion 4. A plurality of locking grooves 7s, 7s extending radially from the center are formed on the upper surface of the stopper lid body 7, and a male screw groove 7a is formed on the outer peripheral surface. Reference numeral 8 denotes a cylindrical shape, and a tube cavity 8h penetrating the inside thereof is arranged so as to be concentrically continuous with the through hole 51a, and is fixedly attached to one fastening portion 50a. A female screw groove 8a that is screwed into the male screw groove 7a of the stopper lid 7 is formed on the inner wall of the upper edge of the tube cavity 8h.

In the present embodiment, the stopper lid 7 is configured to be screwed on the inner wall of the upper end opening of the tube sinus 8h, but in addition to this, the stopper lid 7 is formed in a crown shape, and is formed. It may be covered and screwed on the outer peripheral wall of the upper end opening of the holder 8.

[0016]

[Operation of the embodiment]

 In the present embodiment configured as described above, first, before fitting the locking ring 6, the shank portion 4 of the bolt 1 is mounted on the shank portion 4 of the bolt 1 from the male screw portion 3 side in this order. After that, the locking ring 6 is fitted and mounted in the annular recess 5. As a result, the engagement ring 6 is mounted so as to be wound so as to project from the outer peripheral surface of the shank portion 4, and the stopper lid body 7 and the receiving seat 57 are slidably moved between the locking ring 6 and the bolt head 2. You will be retained as you can.

Next, the bolt 1 having the above-mentioned configuration is inserted from the male screw portion 3 into the tube cavity 8h of the holding body 8. At this time, a coil-shaped spring 58 is interposed between the receiving seat 57 and the stepped portion 8d of the holding body 8, and the spring 58 is bent and compressed. Then, the stopper lid body 7 is attached to the upper end opening of the holding body 8 by screwing the male thread groove 7 a and the female thread groove 8 a of the holding body 8. The stopper lid 7 is screwed in by inserting a tool such as a driver through the gap of the spring 58 and hooking it in the locking groove 7s.

After assembling as described above, the socket 9 connected to the rotation driving means (not shown) such as the nut runner is fitted to the one-letter head 2 of the bolt 1, and the spring 1 is used in the same manner as in the conventional case. While flexing and compressing 58, the male threaded portion 3 of the bolt 1 that has been penetrated is screwed into the female threaded hole 53h of the nut 53 to perform fastening. To cancel this, the reverse process may be followed. The bolt 1 separated from the nut 53 by rotating the bolt head 2 in the releasing direction (counterclockwise direction) is pulled upward by the elastic force of the spring 58. At this time, the locking ring 6 comes into contact with the opening edge 7e of the stopper lid 7 to prevent further pulling up. As a result, the bolt 1 is held substantially vertically with the portion below the locking ring 6 inserted into the tube cavity 8h of the holding body 8.

Next, when removing the bolt 1 for the purpose of replacing the bolt 1 or the like, a rod-shaped tool such as a screwdriver is inserted through the gap of the spring 58 in the same manner as when the stopper lid 7 is attached, and the locking groove is inserted. It may be removed by engaging with 7s and rotating. In the above description of the present embodiment, the bolt 1 is held in the vertical direction in the drawing and the holding body 8 is attached above the fastening portion 50a, but the present invention is limited to this arrangement. Not something to do. That is, the two fastening portions 50a, 50b that have been brought into contact with each other may be arranged on the left and right, in addition to being arranged on the upper and lower sides. You may make it hold | maintain the nut 53 in the upper fastening part 50a.

[0020]

【effect】

 With the above configuration, the present invention has the effects listed below. The stopper lid is removably fixed to the upper opening of the holder, and the engagement of the stopper lid with the locking ring attached to the shank of the bolt prevents the bolt from being pulled up. By removing the stopper lid, you can easily pull out the bolt. Therefore, the bolts can be easily replaced.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing the present embodiment.

FIG. 2 is an exploded perspective view showing an exploded view of the present embodiment.

FIG. 3 is a vertical sectional view showing a conventional example.

[Explanation of symbols]

1 ... Bolt 2 ... Head
3 ... Male screw part 4 ... Shank part 5 ... Annular recess
6 ... Locking ring 7 ... Stopper lid 8 ... Holder
8h ··· Tube cavity 9 ··· Socket 50 ···
51 ... Through hole 53. Nut 57.
58. Spring

Claims (4)

[Scope of utility model registration request] 1. A bolt (5) penetrating a fastening portion (50).
6) and a nut (53) screwed thereto, which is a fastening bolt device for fastening overlapping plate-shaped members, wherein through holes (51) aligned with fastening portions (50) abutting each other are provided. A tubular holding body (52) in which the inner tubular cavity (52h) and the through hole (51a) are concentrically continuous is provided on the opposite contact surface side (50u) of the one through hole (51a). Is erected and fixed, and on the opposite contact surface side (50d) of the other through hole (51b), a nut (53) in which the female screw hole (50h) and the through hole (51b) are concentrically continuous. Is attached and fixed, and a bolt (56) having a male screw portion (56a) formed at a tip end thereof can be inserted into the through hole (51) in the tube cavity (52h) of the holding body (52). And is held under the head (56h) of the bolt (56), Between the fastening part (50a) via ring-shaped seat (the 57),
In a fastening bolt device in which a biasing means (58) having an expanding force is arranged, in a shank portion (4) between a male screw portion (3) and a head portion (2) of a bolt (1), A locking part (6) protruding from the outer peripheral surface is formed so that the disk-shaped stopper lid (7) can be slidably moved between the locking part (6) and the receiving seat (57). The fastening bolt device is attached to the shank portion (4) and is detachably attached to the open end side of the holding body (8). 2. The fastening bolt device according to claim 1, wherein the engaging portion (6) is detachable. 3. The fastening bolt device according to claim 1, wherein the stopper lid body (7) is screwed onto the inner wall (8a) of the tubular cavity at the open end of the holding body (8). . 4. The fastening bolt device according to claim 1, wherein the stopper lid (7) is fitted on the outer peripheral wall of the open end of the holder (8).