JP2017222005A - Bolt/nut fastener and grooved bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bolt/nut fastener which can loosen or fasten bolts from one side while preventing the co-rotation of the bolts which are different in diameters as far as a grooved bolt is used, and the grooved bolt.SOLUTION: The bolt/nut fastener comprises: a hollow socket for making a nut engaged therewith; a cylindrical member fit with the socket; a rod-shaped member having an engagement part which is engaged with a groove at one end, and freely moving in both the socket and the cylindrical member; an elastic member for energizing the rod-shaped member toward the socket; a first handle which is fixed to the cylindrical member, and regulates the rotation of the cylindrical member by being gripped; and a second handle which is locked to the rod-shaped member, and makes the rod-shaped member freely rotate. The rod-shaped member has a locked part to which the second handle is locked at the other end, and moves between an engagement position engaged with the groove and a separation position separated from the groove.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bolt nut fastener and a grooved bolt that can be fastened from one side while preventing co-rotation of a grooved bolt having a groove formed at the tip.

There are bolts and nuts of various diameters, and it is inconvenient to tighten or loosen with a jig that matches the diameters each time. Therefore, a jig capable of fastening bolts having different diameters with a single jig has been developed.
However, in the initial stage of tightening, the bolts and the like must be held by hand and pushed into the inner socket of the jig, so that there is a problem that the tightening operation cannot be performed in a narrow place. In view of this, tightening sockets such as bolts have been developed that do not require the bolts to be pressed by hand even at the initial tightening stage (see Patent Documents 1 and 2).
In that case, when fixing an article from the outside of a hollow structure inside or when fixing equipment on a low pedestal installed on the floor or ground, it is necessary to fasten it with a jig from one side of the bolt and nut. There is a problem, however, how to prevent co-rotation of bolts and nuts.
Therefore, a blind nut having a flange formed at the end is embedded in the first member, the second member is stacked thereon, and further fastened with a bolt screw through a washer, and the washer, the second member, and the flange are frictionally engaged. A fastener and a fastening method that prevent joint rotation of the bolt and the blind nut by combining them are disclosed (see Patent Document 3).
However, in this method, when the structure is a light roof, the roof may be damaged.
Therefore, a rotation locking member that can rotate in a protruding posture that extends in a direction that intersects the bolt body, a holding member that holds the bolt body and the rotation locking member so as to move up and down, and a rotation locking member that faces the protruding posture. There has been disclosed a fixing bolt that is provided with a leaf spring that is urged to rotate in order to prevent co-rotation and can easily fix an article from the outside of the structure (see Patent Document 4).

JP 2001-105333 A JP 2002-331468 A JP 2001-173629 A JP 2014-84935 A

However, when using the jigs disclosed in Patent Literature 1 and Patent Literature 2, it is necessary to configure the bolt and nut as in Patent Literature 3 or 4 in order to prevent the bolt and nut from rotating together. That is, a blind nut and a washer having a flange formed at the end portion are used, or a special member and a round bar-like member composed of a rotation locking member, a holding member, and a leaf spring for energizing the rotation locking member. It is necessary to use bolts.
The present invention has been made in view of such circumstances, and as long as a grooved bolt with a groove formed at the tip is used, while preventing the grooved bolt having various diameters from rotating together, An object of the present invention is to provide a bolt and nut fastener and a grooved bolt that can be loosened or tightened.

The bolt and nut fastener of the present invention is a bolt and nut fastener that fastens an object to be fastened with a nut from one side by a grooved bolt having a groove formed at the tip, and a hollow socket that engages the nut. A cylindrical member that fits the socket, an engagement portion that engages with the groove at one end, and a rod-shaped member that freely moves inside both the socket and the cylindrical member; and the rod-shaped member An elastic member that urges toward the socket; a first handle that is fixed to the cylindrical member and restricts rotation of the cylindrical member by gripping; and the rod-shaped member that is engaged with the rod-shaped member. A second handle for freely rotating the rod-like member, and an engagement position for engaging the second handle is formed at the other end of the rod-like member, and the engagement position for engaging with the groove and the groove To move away from the separated position. To.
In this way, the rod-shaped member that engages the tip (groove) of the grooved bolt moves in the hollow socket that engages the nut with respect to the grooved bolt that has a groove formed at the tip. If the bolt and nut fastener is used, the object to be fastened can be fastened from one side while preventing the grooved bolt and the nut from rotating together. In addition, since the socket that engages with the nut is configured to be detachable, the rod-shaped member provided with an engaging portion at one end can be replaced with a grooved bolt of various diameters by replacing it according to the shape and size of the groove. Can be applied.
Here, the cylindrical member has a polygonal opening on one end side and a circular opening on the other end side, and the socket has a polygonal shape that fits into the polygonal opening of the cylindrical member. The cylindrical member may have an outer wall, the cylindrical member has circular openings at both ends, a through-hole is formed in a wall surface of a portion where the socket is fitted, and the socket is the cylindrical When fitted in the circular opening of the member, it may have a screw hole through which a screw searched for in the through hole is fitted.
That is, the method of fitting the socket to the cylindrical member is to make the inner wall of the opening of the cylindrical member polygonal, while the outer wall of the socket fitted therein may be made polygonal, While the inner wall is made circular, the outer wall of the socket fitted therein may be made circular and screwed together with a common screw. If the rotation of the cylindrical member is suppressed in this way, the rotation of the socket is also suppressed. Therefore, even if the rod-shaped member is rotated and the grooved bolt is rotated, the nut does not rotate together.
In that case, the cylindrical member is provided with a support member that fits into the circular opening of the cylindrical member and supports the rod-shaped member in a movable manner, and the rod-shaped member has a plug that detachably searches the engaging portion. Can be.
Thus, if a plug is provided in a rod-shaped member, about the engaging part engaged with a grooved bolt, it can comprise as a separate part from a rod-shaped member.

The grooved bolt of the present invention is characterized in that a groove is formed at the tip, and an object to be fastened is fastened with a nut.
Here, the groove is a minus or plus character or polygon, and the object to be fastened is one side using a jig having an engagement portion that engages with the groove and a socket that engages with the nut. It can be fastened with a nut from the side.
In this way, if a bolt with a groove provided with a groove at the tip of the bolt is used, a jig having an engaging portion that engages with the groove and a socket that engages with the nut is used to prevent the nut from rotating together. The fastened object can be fastened from the side. Therefore, since the head of the grooved bolt can be made into an arbitrary shape, the human body and clothes can be used at the place where the head touches,

According to the bolt and nut fastener of the present invention, the object to be fastened can be fastened from one side while preventing the grooved bolt and the nut from rotating together. In addition, the present invention can be applied to grooved bolts of various diameters by replacing the socket that engages with the nut, or by replacing the entire engaging portion or the rod-shaped member.
According to the grooved bolt of the present invention, since the shape of the head can be arbitrarily selected, it can be used in a place where the head touches a human body or clothes, and the degree of freedom in using the bolt and nut is improved.

FIG. 1 is a diagram illustrating a bolt and nut fastener according to the first embodiment. FIG. 2 is a front view of the main body showing a cross section excluding the first handle. FIG. 3 is a side view of the main body viewed from the driver bit side. FIG. 4 is a side view of the main body as seen from the concave side. FIG. 5 is a side view of the second handle. FIG. 6 is a front view of the second handle. FIG. 7 is a rear view of the second handle. FIG. 8 is a diagram illustrating a driver bit as an example. FIG. 9 is a diagram illustrating an example of a groove formed at the tip of the grooved bolt. FIG. 10 is a side view showing an example of the socket. FIG. 11 is a front view showing an example of a socket. FIG. 12 is a rear view showing an example of the socket. FIG. 13 is a side view showing another example of the socket. FIG. 14 is a diagram illustrating an example of a support member. FIG. 15 is a diagram illustrating the grooved bolt according to the first embodiment. FIG. 16 is a view showing a method of fastening the object to be fastened from one side with the bolt and nut fastener of the present embodiment by using the grooved bolt of the present embodiment. FIG. 17 is a view showing a method of fastening the object to be fastened from one side with the bolt and nut fastener of the present embodiment by using the grooved bolt of the present embodiment. FIG. 18 is a view showing a method of fastening the object to be fastened from one side with the bolt and nut fastener of the present embodiment using the grooved bolt of the present embodiment. FIG. 19 is a diagram illustrating a main body and a socket of the bolt and nut fastener according to the second embodiment. FIG. 20 is a diagram illustrating a situation in which the object to be fastened is fastened from one side by the bolt and nut fastener of the second embodiment.

Below, the embodiment of the bolt nut fastener of the present invention and a slotted bolt is described based on figures.
The first embodiment is an embodiment of a bolt and nut fastener in which an engaging portion is configured to be detachable, and a grooved bolt having a different head shape and groove shape.
FIG. 1 is a diagram illustrating a bolt and nut fastener according to the first embodiment.
A bolt and nut fastener 10 shown in FIG. 1 includes a socket 1 that engages a nut, a cylindrical member 2 that fits the socket 1, and a driver bit that engages a groove of a grooved bolt. The same applies hereinafter.) A bar-shaped member 3 that can move freely inside both the socket 1 and the cylindrical member 2 and a coil spring that urges the bar-shaped member 3 toward the socket 1 ( This corresponds to the “elastic member” of the present invention (hereinafter the same) 4, a support member 25 that is fitted to one end of the cylindrical member 2 and supports the rod-shaped member 3, and is fixed to the cylindrical member 2. And a first handle 6 for restricting rotation of the tubular member 2 by gripping with a hand. The other end of the rod-shaped member 3 protruding from the cylindrical member 2 has a recess 8 (corresponding to the “engaged portion” of the present invention; the same applies hereinafter) 8, and the second handle 7 is in the recess 8. The bar-shaped member 3 is configured to be freely rotated by the second handle 7.

In the socket 1 in this embodiment, the one end side inner wall 1a is formed in a hexagonal shape so that a hexagonal nut can be engaged. The cylindrical member 2 has a hexagonal shape so that the other end side inner wall 2a to which the socket 1 is fitted can be fitted to the other end side outer wall 1b of the socket 1.
Here, a magnet 13 having a round hole through which the driver bit 5 passes is installed on the side of the cylindrical member 2 where the socket 1 is fitted. The socket 1 fitted to the cylindrical member 2 is a magnet. 13 is formed of a metal such as iron, cobalt, or nickel adsorbed on the magnet 13, but the magnet 13 is not always necessary.
Further, the inner wall of the socket 1 is formed in a hexagonal shape so as to engage with the hexagonal nut, but may be formed in, for example, an octagonal shape in accordance with the outer shape of the nut. Further, the outer wall 1b on the other end side of the socket 1 and the inner wall 2a on the other end side of the tubular member are both formed in a hexagonal shape. There is no need.

The rod-shaped member 3 is inserted into the socket 1 and the cylindrical member 2, and an insertion socket 26 is formed on the side opposite to the side where the recess 8 is formed. The driver bit 5 is inserted into the insertion socket 26 so as to be freely slidable.
The coil spring 4 is disposed inside the cylindrical member 2, between the insertion socket 26 and the support member 25, and the insertion socket 26, that is, the driver bit 5 is biased toward one end side of the socket 1. Accordingly, the driver bit 5 can normally remain in the engagement position where it freely engages with the groove of the grooved bolt. However, when the concave portion 8 is pulled forward, the driver bit 5 is separated from the groove 9. It can be moved to the separated position.
When the driver bit 5 remains in the engagement position, the driver bit 5 is engaged with the groove of the grooved bolt, and then the socket 1 is pushed into the nut with the gripped first handle 6 to be engaged with the nut 32. And if the rod-shaped member 2 is rotated with the 2nd handle 7, the grooved bolt 31 engaged with the driver bit 5 will rotate, and a bolt nut can be fastened or loosened.
Here, as the second handle 7, a commercially available ratchet type can be used.

2 to 4 are views showing the main body of the bolt and nut fastener according to the first embodiment, FIG. 2 is a front view showing a cross section excluding the first handle, and FIG. 3 is a view from the driver bit side. FIG. 4 is a side view seen from the concave side.
As shown in FIG. 2, the main body of the bolt and nut fastener 10 includes a cylindrical member 2 into which the socket 1 is fitted, a driver bit 5, an insertion socket 26 formed at one end, and a recess 8 at the other end. And a second handle 7 for holding the tubular member 2 is fixed to the tubular member 2 so as to be rotatable in the longitudinal direction of the tubular member 2. The handle 7 is folded for convenience of carrying.
The rod-shaped member 3 is energized by the coil spring 4, and the driver bit 5 is inserted into the insertion socket 26 so as to be freely slidable.
Since the coil spring 4 is disposed between the support member 25 fitted to the end of the tubular member 2 and the insertion socket 26, the bar-shaped member 3 is urged toward the socket 1 so as to be movable. Has been.

In the main body shown in FIG. 3, the first handle 6 is in an open state, and the side surface viewed from the driver bit 5 side has a hexagonal opening 21 of the cylindrical member 2 into which the socket 1 is fitted. The hexagonal opening 21 is formed by a circular outer wall and a hexagonal inner wall 2a. In the center of the hexagonal opening 21, a driver bit 5 having a letter shape with a minus tip is disposed.

The main body shown in FIG. 4 is in a state in which the second handle 7 is opened, and a rectangular opening 8a in which the second handle 7 is engaged at the center and a circular outer wall 8b are provided on the side surface viewed from the concave portion 8 side. The circular opening 22 of the cylindrical member 2 is closed around the concave portion 8 by a support member 25 that supports the rod-shaped member 3.

5 to 7 are views showing the second handle. FIG. 5 is a side view, FIG. 6 is a front view, and FIG. 7 is a rear view.
On the front side of the second handle 7, there is a locking claw 7 a that regulates the rotational direction, and on the back side, there is a rectangular protrusion 7 b that engages with the recess 8 of the rod-like member 3.
When the protrusion 7b of the second handle of the present embodiment is engaged with the recess 8 and, for example, the locking claw 7a is rotated clockwise, the second handle 7 is free to rotate clockwise, Although the rod-shaped member 3 cannot be rotated, the rod-shaped member 3 can be rotated counterclockwise when the second handle 7 is rotated counterclockwise.
When the locking claw 7a is rotated counterclockwise, the second handle 7 is free to rotate counterclockwise and cannot rotate the rod-shaped member 3, but rotates clockwise. Sometimes the rod-like member 3 can be rotated clockwise. However, the second handle 7 is not necessarily limited to this configuration.

FIG. 8 is a diagram showing a driver bit as an example, and the upper part indicated by an arrow shows the shape of the tip of the driver bit that engages with the groove of the grooved bolt.
In FIG. 8, (a) is a character shape with a negative tip 5a, (b) is a character shape with a positive tip 5a, and (c) is a rectangular tip 5a. (D) shows that the tip 5a has a hexagonal shape.
The driver bit 5 shown in (a) to (d) is searched by inserting the rear end 5b into the insertion socket 26 formed at one end of the rod-like member 3 shown in FIG. 1 or FIG. In the insertion socket 26, for example, the insertion port has a rectangular shape, and the rear end 5b of the driver bit 5 to be inserted into the insertion port also has a rectangular shape. 3 and move together, and rotate together with the rod-shaped member 3.
Here, the insertion port and the rear end 5b of the driver bit 5 in the insertion socket 26 of the present embodiment are both rectangular, but even if it is detachably engageable, it is polygonal. It may be.
Further, the tip 5a of the driver bit 5 is selected and searched according to the shape of the groove 9 formed at the tip of the grooved bolt.

FIG. 9 is a diagram illustrating an example of a groove formed at the tip of the grooved bolt.
In FIG. 9, (a) is a character shape in which the groove 9 formed at the tip of the grooved bolt 31 is minus, and (b) is a character shape in which the groove 9 formed at the tip of the grooved bolt is plus. (C) shows that the groove 9 formed at the tip of the grooved bolt is rectangular, and (d) shows that the groove 9 formed at the tip of the grooved bolt is hexagonal. The groove 9 of the grooved bolt 31 shown in FIGS. 9 (a) to 9 (d) is fastened by using a driver bit 5 shown in FIGS. 8 (a) to 8 (d) corresponding to the shape of the tip 5a.

10 to 12 are views showing an example of the socket. FIG. 10 is a side view, FIG. 11 is a front view, and FIG. 12 is a rear view.
As for the socket 1 of this embodiment, the inner wall 1a of the one end side which a nut fits is formed in the hexagon. And the outer wall 1b of the other end side fitted to a cylindrical member is formed in a hexagon, and there exists a circular opening 1c in which the rod-shaped member 3 can move freely in the center.

FIG. 13 is a side view showing another example of the socket.
(A) and (b) are sockets 1 for fastening relatively small-sized grooved bolts, and the outer wall 1b on the other end side to be fitted to the cylindrical member 2 has the same size, but the nut is The inner wall 1a on one end side to be fitted is made smaller according to the size of the nut.

FIG. 14 is a diagram illustrating an example of a support member.
As shown in FIG. 14, the support member 25 is a cylindrical member in which the rod-shaped member 3 moves freely inside, and has a flange 25 a at one opening end, and a circular opening 22 of the cylindrical member 2 on the outer periphery. A screw 25b that is screwed onto the screw is engraved. Therefore, when the rod-shaped member 3 is pulled forward, it is restrained by the insertion socket 26, so that the rod-shaped member 3 supports the tubular member 2 so that it can move smoothly, while the rod-shaped member 3 is supported by the tubular member 2. Can be prevented from falling off.

FIG. 15 is a diagram illustrating the grooved bolt according to the first embodiment.
In FIG. 15, a solid line arrow on the right side is a plan view of the tip of the grooved bolt, and a broken line arrow on the left side is a plan view of the head of the grooved bolt.
In the grooved bolt 31 in FIG. 5A, the head 31a has a hexagonal shape, and a negative character-shaped groove 9 is formed at the tip.
In the grooved bolt 31 in FIG. 5B, the head 31a has a hemispherical shape, and a positive character-shaped groove 9 is formed at the tip.
The grooved bolt 31 in (c) has a shape in which the head 31a cuts the edge of the hemisphere, and a rectangular groove 9 is formed at the tip. The head 31a is provided with a plus character-shaped groove 9.
Here, the grooves in (a) and (b) may be either closed or open at both ends.
Here, the head 31a of the grooved bolt 31 is not necessarily limited to the hexagonal shape or the hemispherical shape illustrated in the drawing, and may be a thin flat shape. When the grooved bolt head 31a cannot be locked with a spanner or a wrench, it is extremely effective to apply the bolt and nut fastener 10 of the present embodiment.
That is, if the bolt and nut fastener 10 of the present embodiment is used, the shape of the head 31a of the grooved bolt 31 can be arbitrarily selected, so that it can be used even in a place where the bolt and nut are easily touched to a human body or clothes. Therefore, the degree of freedom of fastening with bolts and nuts is improved.

FIGS. 16 to 18 are views showing a method of fastening the object to be fastened from one side to the grooved bolt of this embodiment using the bolt and nut fastener of this embodiment.
FIG. 16 shows that the socket 1 suitable for the size of the nut 32 is attached to the main body of the bolt and nut fastener 10 of the present embodiment in which the driver bit 5 corresponding to the groove of the grooved bolt is attached, and the first handle 6 is attached. The state is shown in which the second handle 7 is engaged with the recess 8 of the bar-shaped member 3.
The grooved bolt 31 is searched through the object to be fastened, and a nut 32 is loosely screwed to the grooved bolt 31.
In FIG. 17, after the tip of the driver bit 5 is engaged with the groove 9 of the grooved bolt 31, the socket 1 is fitted to the nut 32 using the first handle 6. At this time, the tip of the driver bit 5 is pushed back slightly against the force of the coil spring 4, thereby strengthening the engagement between the tip of the driver bit 5 and the groove 9 of the grooved bolt.
In FIG. 18, the locking claw 7a (not shown) of the second handle is rotated clockwise, and the second handle 7 is repeatedly rotated counterclockwise. Thereby, since the grooved bolt 31 rotates in the clockwise direction, the distance between the head 31a and the nut 32 is reduced, and the object to be fastened is firmly fastened.
Although the case of tightening has been described here, the nut 32 can be loosened by rotating the grooved bolt 31 in the direction opposite to the tightening direction.

[Second Embodiment]
In the second embodiment, the bolt and nut fastener is compared with the bolt and nut fastener of the first embodiment. The socket and the fitting means of the tubular member of the main body with the socket, the rod member and the driver bit Although the coupling means is different, other components are common. Moreover, the 2nd handle engaged with the recessed part 8 of the rod-shaped member 3 is also common, and the grooved bolt which fastens a to-be-fastened thing is also common. Therefore, the overlapping description with respect to a common thing is abbreviate | omitted, and demonstrates the socket and main body which are different among a bolt nut fastener.
FIG. 19 is a diagram illustrating a main body and a socket of the bolt and nut fastener according to the second embodiment.
A bolt and nut fastener 20 shown in FIG. 19 includes a socket 18 that engages a nut 32 that is fastened to a grooved bolt 31 and a second handle 7 (not shown) that is engaged with the main body.
The main body includes a cylindrical member 17 into which the socket 18 is fitted, a rod-shaped member 16 that freely moves inside both the socket 18 and the cylindrical member 17, and a coil spring that applies the rod-shaped member 16 toward the socket 18. 4 and a support member 25 that is fitted to one end of the cylindrical member 17 and supports the rod-shaped member 16, and is fixed to the cylindrical member 17, and the cylindrical member 17 is rotated by being gripped by hand. The 1st handle | steering wheel 6 which regulates is provided. Further, the rod-like member 16 is formed with a driver bit 5 which engages with the groove 9 of the grooved bolt 31 at one end, and a second handle 7 (not shown) is engaged with the other end protruding from the cylindrical member 17. A concave portion 8 is formed. The rod-like member 16, that is, the driver bit 5 can be freely rotated by the second handle 7 engaged with the recess 8.
The cylindrical member 17 in the present embodiment has circular openings 22 at both ends, and a through hole 23 is formed in the wall surface of the portion where the socket 18 is fitted. A magnet 13 having a round hole through which the driver bit 5 passes is installed on the side of the cylindrical member 17 where the socket 18 is fitted. The socket 18 fitted to the cylindrical member 17 is a magnet. 13 is formed of a metal such as iron, cobalt, or nickel adsorbed on the metal. However, since the magnet 13 is not necessarily required, the socket 18 in that case is not necessarily formed of iron, cobalt, nickel or the like.
In the socket 18, the inner wall 1a on one end side is formed in a hexagonal shape so that a hexagonal nut can be engaged, but the outer wall 1b on the other end side is different from that in the first embodiment. A screw hole 12 that is formed in a circular shape and into which a screw searched for in the through-hole 23 when fitted in the circular opening 22 of the cylindrical member 17 is provided.
Therefore, if the socket 18 is fitted to the cylindrical member 17 and a common screw is screwed into the through hole 23 and the screw hole 12, the socket 18 is firmly fixed to the cylindrical member 2. Even if the cylindrical member 17 is gripped by the handle 6 and the driver bit 5 is rotated by the second handle 7 and the grooved bolt 31 is rotated, the rotation of the grooved bolt 31 and the nut 32 can be prevented.

FIG. 20 is a diagram illustrating a situation in which the object to be fastened is fastened from one side by the bolt and nut fastener of the second embodiment.
A bolt and nut fastener 20 shown in FIG. 20 has a rod-like member 16 integrally formed with a driver bit 5 that engages with a groove 9 of a grooved bolt 31, and a cylindrical shape in which the rod-like member 16 freely moves. The member 17, the rod-shaped member 16 supports the tubular member 17 so that it can move smoothly, while the rod-shaped member 16 prevents the rod-shaped member 16 from falling off the tubular member 17, and the coil that energizes the rod-shaped member 16. A spring 4, a first handle 6 that is fixed to the cylindrical member 17 and is rotatable, and a second handle 7 that is engaged with a recess 8 formed at the other end of the rod-shaped member 16 are provided.
The first handle 6 is pulled forward, the distance between the first handle and the second handle 7 is shortened, and the driver bit 5 is engaged with the groove 9 at the tip of the grooved bolt 31. Next, the first handle 6 is fed forward by the force of the coil spring 4, the socket 18 is pressed against the object to be fastened, and the socket 18 is engaged with the nut 32. Then, by rotating the driver bit 5 with the second handle 7, the grooved bolt 31 can be fastened to the article to be tightened while preventing co-rotation.
When loosening the nut 32, the rotation direction of the driver bit 5 may be reversed after the same operation.

The bolt and nut fastener of the present invention can be used for maintenance and repair work of daily necessities in general households, in addition to various civil engineering works, assembly work and maintenance of industrial machines. Moreover, the grooved bolt of the present invention can be used for various civil engineering works such as guards, fences, and scaffolds, various devices, industrial machines, daily necessities, and the like.

DESCRIPTION OF SYMBOLS 1, 18 Socket 1a Inner wall 1b at one end Outer wall 1c at the other end Circular opening 2, 17 Tubular member 3, 16 Bar member 4 Coil spring 5 Driver bit 5a Front end 5b Rear end 6 First handle 7 Second handle 7a Locking claw 7b Protrusion 8 Recess 8a Rectangular opening 8b Circular opening 9 Groove 10, 20 Bolt nut fastener 12 Screw hole
13 Magnet 21 Hexagonal opening 22 Circular opening 23 Through hole 24 Screw 25 Support member 25a 鍔 25b Screw 26 Insertion socket 31 Grooved bolt 31a Head 32 Nut

Claims (6)

A bolt and nut fastener for fastening an object to be fastened with a nut from one side with a grooved bolt having a groove formed at the tip,
A hollow socket engaging the nut;
A cylindrical member for fitting the socket;
A rod-shaped member having an engaging portion that engages with the groove at one end and freely moving inside both the socket and the tubular member;
An elastic member for urging the rod-shaped member toward the socket;
A first handle fixed to the tubular member and restricting rotation of the tubular member by gripping;
A second handle that engages with the rod-shaped member and freely rotates the rod-shaped member;
The bar-shaped member has an engaged portion to which the second handle is engaged at the other end, and moves between an engagement position for engaging with the groove and a separation position for separating from the groove. Bolt and nut fasteners to do. The cylindrical member has a polygonal opening on one end side and a circular opening on the other end side,
The bolt and nut fastener according to claim 1, wherein the socket has a polygonal outer wall that fits into the polygonal opening of the cylindrical member. The cylindrical member has a circular opening at both ends, and a through hole is formed in a wall surface of a portion to which the socket is fitted,
2. The bolt and nut fastener according to claim 1, wherein the socket has a screw hole into which a screw sought through the through hole is fitted when the socket is fitted into the circular opening of the cylindrical member. . A support member that fits into the circular opening of the cylindrical member and supports the rod-shaped member movably;
The bolt and nut fastener according to any one of claims 1 to 3, wherein the rod-shaped member includes a plug for detachably searching the engaging portion. A grooved bolt, characterized in that a groove is formed at the tip and the object to be fastened is fastened with a nut. The groove has a minus or plus letter shape or polygon,
The grooved portion according to claim 5, wherein the object to be fastened is fastened with a nut from one side using a jig having an engaging portion that engages with the groove and a socket that engages with the nut. bolt.