JPH10286695A - Temporary fixing tool for nut welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary fixing tool for nut welding which is used by only changing a bolt part, which reduces the chaining cost and which is used generally. SOLUTION: A temporary fixing tool 1 for but welding is composed of a handle part 3 provided with a bolt attaching recessing part 2 on the top end side, a bolt part 4 attached attachably and detachably on the bolt attaching recessing part 2 of the handle part 3 and an engaging member 7 fixing the handle part 3 and the bolt part 4. The bolt part 4 has a projection part 9a which is projected to the outside of axial direction when it is attached on the handle part 3 and a nut screwing screw 11 formed on the projection par 9a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary fixing tool for welding a nut for temporarily fixing a nut at a predetermined position when welding the nut to various members.

[0002]

2. Description of the Related Art In recent years, unit buildings using box-shaped building units have been provided as a kind of prefabricated buildings. In this unit building, building units and other components are manufactured in advance in the factory, transported to the building site by truck, and the required number of building units are
The building is built side by side and stacked. The connection between building units and other members is usually performed by tightening bolts to nuts that have been welded to various members in a factory in advance.

[0003]

Therefore, if the accuracy of the mounting position and the inclination of the nut is not sufficient, a considerable amount of labor is required for constructing the building at the construction site. Nuts are welded using a nut fixing device. However, depending on the nut mounting position of the member, there are cases where the operation using an automatic nut fixing device or the like is difficult. Therefore, an object of the present invention is to provide a temporary fixing tool for welding a nut, which can easily perform a temporary fixing at the time of welding a nut and select an installation position.

[0004]

Means for solving the above problems are as follows: a handle provided with a bolt mounting recess at the tip end; a bolt removably mounted in the bolt mounting recess; The handle portion includes a locking member for fixing the bolt portion, and the bolt portion forms a protruding portion that protrudes outward from the handle portion when the bolt portion is attached to the handle portion. It is a nut welding temporary fixing tool having a coaxial arrangement guide portion on a base portion side and a nut screwing screw portion on a distal end side.

[0005] The handle has a through hole which penetrates from the side surface of the handle into the bolt mounting recess, and into which the locking member is screwed.
The bolt portion has a locking concave portion on a side surface, and the bolt portion is configured such that a tip end portion of a locking member is pressed into the locking concave portion from the through hole to press the bolt portion mounting concave portion. It is desirable to be attached to. It is preferable that the handle has a second through-hole penetrating from the rear end to the recess for mounting the bolt. Further, it is preferable that the projecting portion includes a spatter intrusion prevention portion that extends further toward the distal end side in the axial direction than the nut screwing screw portion.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A temporary fixing tool for welding a nut according to the present invention will be described below with reference to an embodiment shown in FIGS. FIG. 1 is a front view of one embodiment of a temporary fixing device for nut welding of the present invention, FIG. 2 is a right side view of the temporary fixing device for nut welding shown in FIG. 1, and FIG. Yes, FIG.
5 is an exploded view of the temporary fixing device for nut welding of the present invention, and FIG. 6 is a diagram for explaining a use state of the temporary fixing device for nut welding of the present invention. It is sectional drawing.

The temporary fixing tool 1 for welding a nut in this embodiment is
As shown in FIGS. 1 and 5, a handle 3 having a bolt mounting recess 2 on the distal end side, a bolt 4 detachably attached to the bolt mounting recess 2 of the handle 3, And a locking member 7 used as a stopper or the like when the portion is mounted in the bolt mounting recess. The bolt portion 4 includes a protrusion 9a that protrudes outward in the axial direction from the handle 3 when the bolt 4 is attached to the handle 3, and a nut screwing screw portion 11 formed on the protrusion 9a.

[0008] Then, as shown in FIG.
The bolt portion 4 has a through hole 5 penetrating from the side surface to the bolt portion mounting concave portion 2, while the bolt portion 4 has a locking concave portion 6 on the side surface, and the bolt portion 4 is screwed into the through hole 5. The distal end of the member 7 is pressed into the locking concave portion 6 and is fixed in the bolt mounting concave portion 2.

By using such a temporary fixing tool, the nut can easily be temporarily fixed even in a position where an automatic nut fixing device or the like cannot be used. Further, even if the bolt portion is deformed due to heat at the time of welding, or if the bolt portion is damaged due to welding spatter adhering near the tip of the bolt portion, only the bolt portion can be replaced and used. Hereinafter, each configuration will be sequentially described.

The grip portion 3 is a member 2 to be welded and fixed to a nut.
When a bolt portion 4 described later is inserted into the 0 bolt insertion hole 20a, it is a member serving as a handle, and is formed in a cylindrical shape.
The outer peripheral surface is knurled to prevent slippage and to easily apply torque.

As shown in FIG. 5, a bolt mounting recess 2 is provided at the tip end of the handle 3 so as to be formed into an inner surface on which the bolt 4 can be mounted. More specifically, the bolt mounting recess 2 of this embodiment is formed in a cylindrical shape, and the main body 9b of the bolt 4 formed in a cylindrical shape can be mounted.

Further, as shown in FIG. 4, the handle 3 has a through hole 5 penetrating from the side surface into the bolt mounting recess 2. As shown in FIG. The through hole 5 is for screwing with a locking member 7 described later, and a threaded portion (thread groove) for screwing with a thread of a locking member (screw means) 7 described later is provided on the inner surface. ) 5a
Are formed.

On the other hand, as shown in FIG.
It has a main body 9b housed in the bolt mounting recess 2 and a protruding portion 9a extending axially forward from the main body 9b. The protruding portion 9a has a bolt insertion hole 20a for a nut welding target member 20. A coaxial arrangement guide portion 10 arranged in the
Nut screwing portion 11 and spatter intrusion preventing portion 12
Are sequentially provided from the base end side toward the distal end side.

As shown in FIG. 4, the main body portion 9b is a portion located in the handle portion 3 when the main body portion 9b is mounted on the handle portion 3, and is formed in a cylindrical shape, and has a locking recess on the side surface. 6
It has. As described above, since the locking concave portion 6 is formed in the main body portion 9b, care is taken that the bolt portion 4 is not easily detached even if the locking member 7 is slightly loosened.

The locking recess 6 is a portion where the locking member 7 is pressed against, and is formed in a rectangular groove as shown in FIG. 1 and has a flat bottom surface. Then, as shown in FIG. 4, the distal end portion of the locking member 7 is pressed while being in contact with the bottom surface portion, and the bolt portion 4 is immovably fixed in the handle portion 3.

The locking member 7 is formed by a screwing means (bolt) having a thread on a side surface, and is attached by screwing with the screwing portion 5a of the through hole 5 when the bolt portion 4 is mounted. For this reason, it does not easily come off. Further, when the bolt portion 4 is to be removed, it is only necessary to pull out the locking member 7 a little, and the attachment and detachment of the bolt portion 4 can be extremely easily performed. Furthermore, as shown in FIG. 4, the locking member 7 is formed to have a length such that the head does not protrude to the outside in the locked state, so that there is no obstacle to gripping the grip portion 3.

The coaxial arrangement guide portion 10 is a portion for welding the nut 21 coaxially with the bolt insertion hole 20a formed in the member 20 to be welded and fixed to the nut, and is provided on the base end side of the protruding portion 9a. At the time of welding, as shown in FIG. 6, it is arranged in the bolt insertion hole 20a of the member. That is, the distal end side from the coaxial arrangement guide section 10 is the bolt section 4.
It will be located outside the handle part 3 at the time of mounting.

The coaxial arrangement guide section 10 is configured to be inserted into the bolt insertion hole 20a when the nut is fixed. A dimension (length in the axial direction) of a portion of the coaxial arrangement guide portion 10 protruding from the handle portion 3 is formed to be smaller than a plate thickness of the welding-fixed member 20 of the nut. In this way, by reducing the dimensions, when the nut is fixed with the temporary fixing tool, the nut 21 and the member 20 to be fixed by welding can be surely brought into close contact with each other.

As shown in FIG. 6, the nut screwing portion 11 is a portion for temporarily fixing the nut during welding. In addition,
In this embodiment, the thread portion has three threads in the embodiment, but may have more than three threads or less than three threads. In order to securely fix the nut temporarily, to quickly attach and detach, and to improve work efficiency. About three peaks are enough.

The spatter intrusion prevention part 12 is a part for preventing spatter from entering the nut during welding and adhering to a thread groove formed in the nut. The spatter intrusion prevention portion 12 is formed in a cylindrical shape with a diameter that does not hinder the screwing of the nut 21 to be welded into the screw portion 11.
Further, as shown in FIG. 6, the nut 21 has a length protruding from the nut toward the distal end in a state where the nut 21 to be welded is attached.

As shown in FIG. 5, the handle 3 has
A second through hole 8 penetrating from the rear end to the bolt mounting recess 2 is provided. By providing such a second through hole, even when the bolt portion 4 is difficult to remove from the handle portion 3, an appropriate bar or the like is inserted into the second through hole and the bolt portion 4 is moved from the rear end side. It can be removed by pressing.

Further, a second concave portion 13 is provided on the rear end side of the handle portion 3. Thereby, the weight of the temporary fixing device for nut welding can be reduced, and the handling is considered to be easier.

Next, a method of using the temporary fixing tool for nut welding of the present invention will be described. First, as shown in FIG.
The bolt 4 is inserted into the bolt mounting recess 2 of the handle 3 and fixed by the locking member 7 as shown in FIG. In this state, the bolt portion 4 is in the mounted state, and the temporary fixing tool 1 for nut welding of the present invention can be used. When the nut 21 is temporarily fixed, the grip 3 is gripped, and the tip of the bolt 4 is inserted into the bolt insertion hole 20a from the non-welding surface of the member 20 to be welded and fixed to the nut. The part 10 is located in the bolt insertion hole 20a. Further, as shown in FIG. 6, the nut 21 is screwed into the nut screwing screw portion 11 and temporarily fixed, and in this state, welding to the welding target member 20 is performed. Then, after the welding of the nut is completed, the temporary fixture for nut welding 1 is rotated to be detached from the nut.

When the bolt portion 4 is damaged by use or when a nut of a different size is welded, the bolt portion 4 is replaced with a new bolt portion or a bolt portion suitable for size.

When replacing the bolt portion 4, the locking member 7
Is returned slightly, the locking member 7 is pulled out from the bolt mounting recess 2, and the bolt 4 is removed. Then, the bolt 4 to be replaced is mounted on the handle 3 as described above. As described above, the temporary fixing device for nut welding of the present invention can be used by replacing only the bolt portion 4, so that the replacement cost can be reduced and it can be used for general purposes.

Although the handle portion of this embodiment is formed in a columnar shape, it is not limited to this, and may be formed in a polygonal shape or an elliptical cross section. Further, although the bolt section mounting recess of this embodiment is formed such that the cross section of the inner surface is circular, the cross section of the inner surface may be formed in a polygonal shape, and the main body of the bolt section may be formed. The portion may be formed in a polygonal column shape. further,
The guide portion for coaxial arrangement may have a polygonal column shape as long as it can be inserted into the bolt insertion hole of the member to be welded and fixed to the nut.

[0027]

According to the temporary fixing tool for welding a nut of the present invention, the temporary fixing for welding the nut can be easily performed, and when the temporary fixing tool is used, the bolt portion is deformed by the heat of welding. Even if the bolts are damaged due to welding or spattering of welding near the tips of the bolts, only the bolts can be replaced and used, and the replacement cost can be reduced. Also, it can be used for general purposes according to the size of the nut.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of a temporary fixing device for nut welding of the present invention.

FIG. 2 is a right side view of the temporary fixture for nut welding shown in FIG. 1;

FIG. 3 is a left side view of the temporary fixing tool for welding a nut shown in FIG. 1;

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is an exploded view of the temporary fixing device for nut welding of the present invention.

FIG. 6 is a cross-sectional view for explaining a use state of the temporary fixing device for nut welding of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temporary fixture for nut welding 2 Bolt mounting concave portion 3 Handle portion 4 Bolt portion 5 Through hole 5a Screwing portion 6 Locking concave portion 7 Locking member 8 Second through hole 9a Projecting portion 9b Body portion 10 Coaxial arrangement Guide part 11 Nut screwing part 12 Spatter intrusion prevention part 13 Second concave part 20 Member to be fixed by welding 20a Bolt insertion hole

Claims (4)

[Claims] A handle provided with a bolt mounting recess on the distal end side; a bolt removably mounted in the bolt mounting recess; and a locking member for fixing the handle and the bolt. The bolt portion is formed with a protrusion projecting outward from the handle portion when the bolt portion is mounted on the handle portion, and the protrusion portion includes a coaxial arrangement guide portion and a nut screwing screw portion. A temporary fixing tool for welding a nut, comprising: 2. The handle has a through-hole through which the side surface of the handle penetrates the recess for mounting the bolt portion and into which the locking member is screwed, and the bolt portion has a recess for locking on the side surface. The temporary fixing for nut welding according to claim 1, wherein the bolt portion is attached to the bolt portion mounting concave portion by pressing a tip end of a locking member from the through hole into the locking concave portion. Utensils. 3. The temporary fixing device for nut welding according to claim 1, wherein the projecting portion includes a spatter intrusion preventing portion extending further in the axial direction than the nut screwing screw portion. 4. A handle according to claim 1, wherein said handle has a second through-hole penetrating from a rear end into said bolt-mounting recess.
Or the temporary fixing tool for nut welding according to any one of the above items.