JP6470018B2 - Screwing jig and method for screwing a joint to a threaded reinforcing bar - Google Patents

Description

  The present invention relates to a screwing jig used together with a rotary tool, and a method of screwing a joint into a screw rebar using the rotary tool and the screwing jig.

  As disclosed in Patent Document 1, a construction method for connecting pre-assembled reinforcing bar rods whose main bars are screw reinforcing bars is known. More specifically, a joint is screwed in advance to one end of the main bar of the rebar bar over the entire length, and at the construction site, the end of the main bar of the rebar bar and the end of the main bar of another bar bar Are arranged in a straight line, and by turning the joint, about half of the joint is screwed to the main reinforcing bar of the other reinforcing bar, and the threaded reinforcing bars of both reinforcing bars are connected.

  Further, as disclosed in Patent Document 2, a precast concrete member in which a main reinforcing bar is a screw reinforcing bar is also known. A precast concrete member is constituted by placing concrete in a state where a reinforcing bar is set in a formwork. One end of the joint is screwed into one end of the main bar of the reinforcing bar before placing the concrete.

  In the precast concrete member, the other end of the joint is opened on one end surface in the longitudinal direction, and the main bar protrudes from the other end surface. When connecting the precast concrete members, the end of the main bar of the other precast concrete member is inserted into the joint opening of one precast concrete member, and the grout material is filled in the joint.

  On the other hand, as disclosed in Patent Document 3, it is known to mount a jig on a rotary tool such as an impact driver or a drill driver. This jig has a fitting portion for fitting with a nut or a bolt, and a gripped portion that is inserted into and gripped by a chuck portion of a rotary tool. By rotating the rotary tool in a state where the nut and the bolt are fitted to the fitting portion of the jig, the nut and the bolt can be screwed together.

JP 2012-177226 A JP 2004-278221 A JP 2006-297508 A

When the joint is screwed into the main bar of the pre-assembled reinforcing bar, the joint has been turned manually until now, but there is a problem that this work is troublesome.
Moreover, in the manufacturing process of the precast concrete member, it is necessary to screw the joint into the main bar of the reinforcing bar rod, but there is a similar problem.
Therefore, it is desired to efficiently perform the screwing operation of the joint using a rotary tool, but an appropriate jig has not been developed.

The present invention has been made to solve the above-described problem, and is for threading a female screw portion formed on the inner periphery of at least one end of a cylindrical member into a male screw portion formed on the outer periphery of a rod-shaped member. A jig used in the above-described method, comprising: a friction engagement portion that is frictionally engaged with the opening periphery of the other end portion of the cylindrical member; and a gripped portion that is gripped by the chuck portion of the rotary tool. It is characterized by.
According to this configuration, the screwing operation of the cylindrical member to the rod-shaped member can be performed efficiently by using the rotary tool. Moreover, the jig can be easily set by merely frictionally engaging the friction engagement portion with the cylindrical member.

Preferably, the friction engagement portion has a circular cross section and a tapered taper, and a frictional engagement with the periphery of the opening in a state where the tip end portion is inserted into the opening of the other end portion of the cylindrical member. Match.
According to this configuration, since the frictional engagement portion is tapered, it can be reliably frictionally engaged with the cylindrical member, and the screwing operation can be performed stably. Further, the screwing operation can be performed by frictional engagement with a plurality of types of cylindrical members having different inner diameters.

Preferably, an engagement member and a shaft are provided, the engagement member has a through hole on a central axis thereof, an outer peripheral portion thereof is provided as the friction engagement portion, and the shaft is provided on the proximal end side with the above-described friction engagement portion. An attachment portion is provided on each of the gripped portion and the distal end side, and the engaging member is fixed to the attachment portion in a state in which the attachment portion of the shaft is passed through the through hole.
According to this configuration, since different parts are used for the friction engagement portion and the gripped portion, these functions can be sufficiently exhibited.

In another aspect of the present invention, the gripped portion of the screwing jig according to any one of claims 1 to 3 is gripped by a chuck portion of a rotary tool, and the friction engagement portion is used as a joint as the cylindrical member. In a state of frictional engagement, the rotary tool is driven to rotate, whereby the joint is screwed into a screw rebar as a rod-shaped member.
Thereby, the screwing operation | work of the coupling to a screw rebar can be performed efficiently.

  According to the present invention, the cylindrical member can be efficiently screwed to the rod-shaped member, and the jig can be easily set on the cylindrical member.

It is sectional drawing which shows the jig for screwing concerning one Embodiment of this invention. It is principal part sectional drawing which shows the process of screwing a coupling | joint to a screw rebar using the said jig | tool and a rotary tool, (A) is the state immediately before screwing work, (B) is the state which screwing work was complete | finished. Respectively. (A) is a schematic diagram showing the operation of screwing the joint to the end of the main bar of the pre-assembled rebar bar using the jig and the rotary tool, and (B) is screwing the joint to all the main bars of the pre-assembled bar bar. Schematic which shows the state which joined, (C) is the schematic which shows the state which connected the main reinforcements of two rebar rods by the said joint. It is principal part sectional drawing which shows the process of screwing another joint to a screw reinforcement using the said jig | tool and a rotary tool.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the screwing jig 5 includes an engaging member 10 made of rubber, resin, or the like, and a shaft 20 made of metal or the like.

  An outer peripheral portion of the engagement member 10 is provided as a friction engagement portion 11. The friction engagement portion 11 is circular in cross section over the entire length and has a tapered taper. The engaging member 10 is formed with a through hole 12 extending on the central axis.

  The shaft 20 has a gripped portion 21 having a non-circular cross section (for example, a substantially hexagonal shape) on the proximal end side and an attachment portion 22 on the distal end side. A male screw 22 a is formed on the outer periphery of the mounting portion 22.

  By passing the attachment portion 22 of the shaft 20 through the through hole 12 of the engagement member 10 and tightening both end surfaces of the engagement member 10 with nuts 31 and 32 (fixing means) screwed to the attachment portion 22, The engaging member 10 is fixed to the attachment portion 22 of the shaft 20.

As shown in FIGS. 2A and 3A, the jig 5 having the above configuration is attached to the rotary tool 6 by inserting the gripped portion 21 into the chuck portion 6a of the rotary tool 6. .
In the present embodiment, the jig 5 and the rotary tool 6 are used for screwing the joint 4 (tubular member) to the main reinforcing bar 2 (screw reinforcing bar; rod-shaped member) of the pre-assembled reinforcing bar rod 1. Details will be described below.

As shown in FIG. 3 (A), the prefabricated reinforcing bar rod 1 has an elongated shape in a straight line. The main reinforcing bars 2 extending in the longitudinal direction of the prefabricated reinforcing rod rod 1 in parallel with each other, The hoop muscles 3 are arranged so as to surround and spaced apart in the longitudinal direction.
As shown in FIG. 2 (A), the main bar 2 has a male screw portion 2a made of screw nodes formed at equal intervals in the longitudinal direction. A female thread portion 4 a is formed on the inner circumference of the joint 4 over the entire length.

As shown in FIGS. 2A and 3A, with the joint 4 coaxial with the main bar 2, the opening at one end of the joint 4 is applied to the end of the main bar 2 and mounted on the rotary tool 6. The frictional engagement portion 11 of the jig 5 thus inserted is inserted into the opening at the other end of the joint 4 and is pressed against the periphery of the opening for frictional engagement. Thereby, the jig 5 is set coaxially with the joint 4.
When the rotary tool 6 is rotationally driven in this state, the jig 5 is rotated, the joint 4 frictionally engaged with the jig 5 is rotated, and the screwing to the main bar 2 proceeds. In this way, the joint 4 can be efficiently screwed to the main bar 2 using the rotary tool 5.

  Since the frictional engagement portion 11 of the jig 5 has a tapered taper, good frictional engagement can be obtained by pressing the jig 5 against the joint 4, and the rotation of the jig 5 is good for the joint 4. Can be communicated to. Further, since the friction engagement portion 11 has a tapered taper, good friction engagement is possible even if the diameter of the joint 4 is different.

As shown in FIG. 2B, after the screwing of the joint 4 has advanced to the vicinity of the limit position by the rotary tool 5, the joint 4 is screwed to the end of the main bar 2 over the entire length by manual work.
In the above manner, as shown in FIG. 3B, the joint 4 is screwed into one end of all the main bars 2.

  In the construction site, another pre-assembled rebar rod 1 ′ having the same configuration is connected to the pre-assembled rebar rod 1 with the joint 4. More specifically, the end of the main reinforcing bar 2 of the pre-assembled reinforcing bar rod 1 on the joint 4 side and the end of the main reinforcing bar 2 of the pre-assembled reinforcing bar rod 1 'are arranged on the same straight line and brought close to each other. In this state, the joint 4 is turned to move about half of the joint 4 to the main reinforcing bar 2 side of the pre-assembled rebar bar 1 ', and the main bars 2 of the pre-assembled rebar bar 1 and 1' are connected to each other as shown in FIG. Connect with 4.

  FIG. 4 shows another example of a joint to be screwed. This joint 4 'is used for a precast concrete member, and an internal thread portion 4a' is formed only at one end. A female thread portion is not formed at the other end portion, and becomes a grout filling space when the above-mentioned precast concrete members are connected to each other.

  A precast concrete member is constituted by placing concrete in a state where a reinforcing bar is set in a formwork. Before the concrete is placed, one end of the joint 4 'is screwed into one end of the main reinforcing bar 2' (screw reinforcing bar) of the reinforcing bar. During the screwing operation, the rotary tool 6 is rotationally driven in a state where the friction engagement portion 11 of the jig 5 is frictionally engaged with the opening periphery of the other end of the joint 4 '. Since the screwing operation is the same as in the case of the pre-assembled rebar 1, detailed description is omitted.

  The present invention is not limited to the above-described embodiments, and various aspects are possible. For example, the rod-like member and the cylindrical member to be screwed may not be a screw rebar and a joint.

  The present invention can be applied to threaded reinforcing bars and joints.

2 Main bars (Screw bars; Bar-shaped members)
2a Male thread 4, 4 'joint (tubular member)
4a, 4a 'Female thread part 5 Threading jig 10 Engaging member 11 Friction engaging part 12 Through hole 20 Shaft 21 Grip part 22 Attachment part

Claims (2)

A jig used for screwing a female screw portion formed on the inner periphery of at least one end of the joint with a male screw portion formed on the outer periphery of the screw rebar ,
An engagement member and a shaft;
The engagement member has a through hole on the central axis thereof, and an outer peripheral portion thereof is provided as a friction engagement portion. The friction engagement portion has a circular cross section and a tapered taper, In a state where the portion is inserted into the opening of the other end of the joint, and frictionally engaged with the periphery of the opening,
The shaft has a gripped portion to be gripped by the chuck portion of the rotary tool on the proximal end side, and an attachment portion in which a male screw is formed on the outer periphery on the distal end side,
The engagement member is fixed to the attachment portion by being tightened with nuts screwed to the attachment portion from both ends on the central axis in a state where the attachment portion of the shaft is passed through the through hole. A screwing jig characterized by the above . By the chuck portion of the rotary tool, in a state in which gripping the gripped portion of the screwing jig of claim 1, frictionally engaged on KiTsugi hand the frictional engagement portion, the rotary drive the rotary tool it allows screwing process of the joint to the threaded rebar, characterized in that screwed into rebar Flip sleep the joint that.

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