JPH05280525A - Jointing nut fixing jig - Google Patents

Abstract

PURPOSE:To provide a jointing nut fixing jig which is suitable for temporary fitting of a connection nut and easy elimination of measurement error occurred in a position of a bolt hole, and can be produced inexpensively. CONSTITUTION:A plurality of bolt holes are formed on a nut receiving plate 2 with specified distances. A nut fixing plate 3 is installed on the nut receiving plate 2, while nut installation holes 6 are formed on the nut fixing plate 3 correspondingly to the positions of the bolt holes 5. The nut installation hole 6 has the same shape as a jointing nut 1 for insertion into the nut installation hole 6 does, and the diameter larger than an outer diameter of the jointing nut 1. Nut pressurizing plates 4 are provided on the nut fixing plate 3 for holding the connection nut 1 inside the nut installation hole 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining nut fixing jig used for joining a steel beam to a column mainly made of a rectangular steel pipe or the like having a closed cross section.

[0002]

2. Description of the Related Art In a steel structure building, a high-strength bolt connection is widely used as a connection between a column and a beam because the connection is generally easy, and a difference between a strong axis and a weak axis exists geometrically. For that reason, closed cross-section materials such as square steel pipes and circular steel pipes are more widely used as pillars than H-section steel.

Conventionally, as a method of joining a column made of such a closed cross-section material and a steel beam with a high-strength bolt, as disclosed in, for example, Japanese Patent Publication No. 62-2087 (see FIGS. 14 and 15). ), A method of inserting the joining metal 10 into the steel pipe column 9, attaching an end plate or split tee 19 to the end of the beam 18, and joining the end plate or split tee 19 to the joining metal 10 by the high-strength bolt 14. It has been known.

[0004]

However, according to this type of joining method, since the hand cannot be inserted inside the steel pipe column 9, the tap hole 20 into which the high-strength bolt 14 is screwed is formed in the joining metal piece 10. Alternatively (see FIG. 14), it is necessary to weld and fix the joining nut 1 instead of forming the tap hole 20 (see FIG. 15), and if there is a dimensional error in the position of the tap hole 20 or the joining nut 1, high strength will result. It may be difficult to screw the bolts 14 together, which requires considerable dimensional accuracy for processing the tap holes and mounting the joining nuts, which is very troublesome.

As a countermeasure against this, there is also a method of using a nut fixing jig capable of temporarily fixing the joining nut 1 to the inside of the steel pipe column 9 (see FIGS. 16 and 17), but the conventional nut fixing jig is used. The tool was forged and the manufacturing cost was very high.

The present invention has been proposed in order to solve the above-mentioned conventional problems. Even when a closed cross-section material such as a rectangular steel pipe is used as a steel pipe column, temporary attachment of the joining nut is easily performed. It is an object of the present invention to provide a joining nut fixing jig that can be joined at a site with a high-strength bolt by easily absorbing a slight dimensional error and can be manufactured at an extremely low cost.

[0007]

A joining nut fixing jig according to the present invention has a nut receiving plate having a plurality of bolt holes provided at predetermined intervals and a nut mounting hole at a position corresponding to the bolt holes. A nut fixing plate that is provided and is attached to the nut receiving plate, and a nut holding plate that is attached to the nut fixing plate to hold the joining nut in the nut attaching hole, and the nut The mounting hole is formed in the same shape as the joint nut in the nut mounting hole and larger than the outer diameter of the joint nut.

[0008]

In the joining nut fixing jig according to the present invention, the joining nut is temporarily inserted by inserting the joining nut into the nut mounting hole of the nut fixing plate, and the joining nut mounting hole is slightly larger than the joining nut. By being formed, the joining nut in the nut mounting hole can be moved up and down, left and right to some extent, and thereby dimensional errors such as the position of the bolt hole at the time of joining with the high-strength bolt are absorbed.

[0009]

【Example】

Example 1. FIG. 1 is a plan view showing an embodiment of a joining nut fixing jig according to the present invention, and FIG. 2 is a sectional view thereof. In the drawing, reference numeral 1 is a joining nut, and 2 is a nut receiving plate for receiving the joining nut 1. Reference numeral 3 denotes a nut fixing plate that fixes the joining nut 1 so as not to move, and reference numeral 4 denotes a nut pressing plate that holds the joining nut 1 so as not to fall off.

The nut receiving plate 2 is formed in an elongated rectangular plate shape, and a plurality of bolt holes 5 for passing a male screw portion (not shown) of the joining bolt are formed in the central portion at predetermined intervals in the longitudinal direction. (See FIGS. 3 and 4).

The nut fixing plate 3 is formed in an elongated rectangular plate shape like the nut receiving plate 2, and a plurality of nut mounting holes 6 for inserting the joining nut 1 are formed in the central portion at predetermined intervals in the longitudinal direction. Has been done. The nut mounting hole 6 is formed in a hexagonal shape corresponding to the shape of the joining nut 1 so that the joining nut 1 to be inserted does not rotate, and is formed to be slightly larger so that the joining nut 1 can be moved back and forth and left and right to some extent. ing. Further, L-shaped attachment pieces 7, 7 are formed at both ends of the nut fixing plate 3 in the longitudinal direction (see FIGS. 5 and 6). Nut fixing plate 3 formed in this way
Is attached to the nut receiving plate 2 such that the bolt holes 5 and the nut mounting holes 6 are aligned with each other, and the mounting pieces 7 and 7 at both ends are welded to both ends of the nut receiving plate 2 so that the nut It is integrated with the backing plate 2. The joining nut 1 is inserted into each nut mounting hole 6.

Between the nut receiving plate 2 and the nut fixing plate 3, the mounting pieces 7, 7 function as spacers so that there is a space corresponding to about one half of the length of the joining nut 1. Therefore, the joining nut 1 inserted into the nut mounting hole 6 is held without falling into the nut mounting hole 6.

The nut pressing plate 4 is formed in a plate shape much thinner than the nut receiving plate 2 and the nut fixing plate 3, and hook-shaped mounting pieces 8, 8 are formed at both ends in the longitudinal direction (see FIG. 7). Further, the nut pressing plate 4 is attached to the upper and lower edge portions of the nut fixing plate 3 so as to press the upper and lower edge portions of each joining nut 1, and the mounting pieces 8 and 8 at both ends are attached to both ends of the nut fixing plate 3. It is attached by welding to the attachment pieces 7, 7.

As shown in FIG. 8, the nut holding plate 4 is formed in the shape of an elongated rectangular plate like the nut fixing plate 3, and a bolt hole 5 through which the male screw portion of the joining bolt can penetrate is provided in the central portion. Moreover, the mounting pieces 8 and 8 may be provided at both ends, and if this nut pressing plate 4 is used, it can be attached directly above the joining nut 1, so that the mounting is simple and the number of parts is large. Is less required.

In such a structure, the method of use will be described (see FIG. 9). For example, a joining nut fixing jig having the joining nut 1 mounted thereon is provided on the back side of the joining metal piece 10 installed inside the steel pipe column 9. Bolt hole 5 and joining hardware 10
The bolt holes 11 are attached in a matched state and are temporarily attached to the metal joint 10 by welding or the like.

Then, the joining bolt 14 is screwed into the joining nut 1 through the bolt hole 13 of the joining metal piece 12 attached to the outside of the steel pipe column 9.

Embodiment 2. FIG. 10 is a plan view showing another embodiment of the joining nut fixing jig according to the present invention, and FIG. 11 is a sectional view thereof. In the figure, reference numeral 15 is a gusset plate for joining members to each other, and 16 is a nut fixing plate.

The gusset plate 15 is formed also as the nut receiving plate 2 of the first embodiment, and a plurality of bolt holes 5 are formed in the gusset plate 15 symmetrically with respect to the center and in parallel with each other. There is.

The nut fixing plate 16 is a gusset plate 15
Is formed in a size that covers one half (right half in the embodiment) from the center of the. Further, a plurality of nut mounting holes 6 are formed in the nut fixing plate 16 so as to correspond to the bolt holes 5 of the gusset plate 15, and the joining nuts 1 are inserted into the nut mounting holes 6, respectively. The other structure is substantially the same as that of the first embodiment.

In such a structure, the method of use will be described by taking the joining method of the upper and lower steel pipe columns as an example (see FIGS. 12 and 13), and the joining nut fixing jig having the joining nut 1 attached thereto is attached to the upper end of the lower steel pipe column 9a. Temporarily attach to the section.

For temporary attachment, a joining nut fixing jig is attached to the inside of the lower steel pipe column 9a with the side where the joining nut 1 is attached facing upward, and the gusset plate 17 is provided on the outside of the lower steel pipe column 9a. Attach. Then, the lower steel pipe column 9 is connected to the gusset plate 15 and the gusset plate 17 by a plurality of joining bolts 14 penetrating both bolt holes 5.
It is temporarily fixed to a (see FIG. 12).

Next, the upper steel pipe column 9b is placed on the upper end of the lower steel pipe column 9a and the lower edge of the upper steel pipe column 9b is inserted between the gusset plate 15 and the gusset plate 17. Then, the bolt holes 5 of the gusset plate 17
More joining nut 1 of joining nut fixing jig to joining bolt 1
Screw 4 together. (See Figure 13).

In the first and second embodiments, the nut receiving plate 2, the nut fixing plate 3 and the nut pressing plate 4 are used.
Each of these is formed of a thin metal plate that is easy to process such as cutting, punching and bending, and welding.

[0024]

Since the present invention is constructed as described above, it has the following effects.

The joining nut can be easily temporarily attached to an inaccessible part such as the inside of the steel pipe column, and
Since many joining nuts can be temporarily attached at one time, the work is easy.

Further, since the joining nut is not directly welded at the time of temporary attachment by welding, it is possible to avoid an adverse effect due to welding heat.

Since the nut mounting hole provided in the nut fixing plate is formed to be slightly larger than the joint nut, the joint nut inserted in the nut mounting hole can be freely moved vertically and horizontally to some extent. Therefore, even if there is some dimensional error in the position of the bolt holes,
By appropriately moving the joining nut vertically and horizontally, a dimensional error can be easily absorbed and the joining bolt can be easily screwed.

Further, since all the parts can be formed from a thin metal plate that can be easily processed and welded such as cutting, bending, and punching, the manufacturing is extremely easy, and
It can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of a joining nut fixing jig according to the present invention.

FIG. 2 is a sectional view of the joining nut fixing jig shown in FIG.

FIG. 3 is a plan view of a joining nut receiving plate.

FIG. 4 is a cross-sectional view of the joining nut receiving plate shown in FIG.

FIG. 5 is a plan view of a joining nut fixing plate.

6 is a cross-sectional view of the joining fixing plate shown in FIG.

FIG. 7 is a perspective view of a joining nut pressing plate.

FIG. 8 is a perspective view of a joining nut pressing plate.

FIG. 9 is a partial vertical cross-sectional view of a column / beam joining portion showing a mode of use of the joining nut fixing jig shown in FIG. 1.

FIG. 10 is a plan view of another embodiment of the joining nut fixing jig according to the present invention.

11 is a cross-sectional view of the joining nut fixing jig shown in FIG.

FIG. 12 is a partial vertical cross-sectional view of the upper and lower column joints before joining, showing a mode of use of the joining nut fixing jig shown in FIG.

13 is a partial vertical cross-sectional view showing the usage state of the joining nut fixing jig shown in FIG. 10 after joining the upper and lower column joining portions.

FIG. 14 is a partial vertical cross-sectional view of a column / beam joining portion showing a conventional column / beam joining method.

FIG. 15 is a partial vertical cross-sectional view of a column / beam joining portion showing a conventional column / beam joining method.

FIG. 16 is a plan view of a conventional joining nut fixing jig.

17 is a sectional view of the joining nut fixing jig shown in FIG.

FIG. 18 is a partial vertical cross-sectional view of a column / beam joint section showing a usage mode of the joint nut fixing jig shown in FIG. 16;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Joining nut, 2 ... Nut receiving plate, 3 ... Nut fixing plate, 4 ... Nut pressing plate, 5 ... Bolt hole, 6 ... Nut mounting hole, 7 ... Mounting piece, 8 ... Mounting piece, 9 ... Steel pipe column, 10 ... Joining hardware, 11 ... Bolt hole, 12 ... Joining hardware, 13 ... Bolt hole, 14 ... Joining bolt, 15 ... Gusset plate, 1
6 ... Nut fixing plate, 17 ... Gusset plate, 18 ... Beam, 19 ... End plate or split tee,
20 ... Tap hole.

Claims (1)

[Claims] 1. A nut receiving plate having a plurality of bolt holes provided at predetermined intervals, a nut mounting hole provided at a position corresponding to the bolt holes, and a nut fixing plate mounted on the nut receiving plate. A plate and a nut retainer plate attached to the nut fixing plate to hold the joint nut in the nut mounting hole, and the nut mounting hole has the same shape as the joint nut in the nut mounting hole. And a joining nut fixing jig which is formed to be larger than the outer diameter of the joining nut.