JPH0421770B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for joining a beam made of H-shaped steel to a column.

[Prior Art] A conventional example of this type of joining method will be described with reference to FIGS. 8 and 9.

The figure shows a state in which a column 22, which is a structural steel member, and a beam 23, which is made of H-shaped steel, are joined.

A bracket 26 (H-shaped steel) having a reinforcing plate 25 is welded in advance to the diaphragm 24 formed on the column 22, and the beam 23 to be joined is butted against the bracket 26, and the upper and lower flange portions 27, 27 of both are welded. have attached plates 28 and 2 on the top and bottom, respectively.
9, and the column and beam were joined by tightening the splint with bolts 30 and nuts 31.

[Problems to be solved by the invention] By the way, in this joining method, (1) bolt holes for joining are made in the upper and lower flanges of the bracket and the beam, so the cross section of the base material is damaged and the strength is deteriorated. However, only 80% to 90% of it is utilized.

(2) Since joining splints, bolt heads, etc. protrude from the upper end of the beam, for example, floor structures (deck plates,
ALC, PC board, etc.), C-type steel or steel plate must be attached to the base material.

(3) Since the joining bolts are attached to both base materials, the bolts will be used with twice the required strength.

(4) Since the welding method is friction welding in which the tension of high-strength bolts is applied, the yield strength of high-strength bolts is not fully utilized.

(5) 3 pieces of one beam to make left and right brackets
This is an unreasonable joining method in which the brackets are cut into sections and then connected, and the brackets are attached to the pillars at the factory and then transported to the site, which obstructs transportation work.

(6) Splints, bolts, nuts, etc. protrude from the flange surface of the structural member, making it impossible to fully demonstrate the beauty unique to steel structures, and also making it difficult to install finishing materials.

There were other problems.

This invention has been made in view of the problems of the prior art, and its purpose is to completely separate the joining part from the structural base material and create a single device that performs the joining function by itself. To provide a device for joining a beam made of H-beam steel to a column, which can perform the joining work easily and accurately, and which can provide a strong joint and also facilitate the attachment of finishing materials. It is.

[Means for solving the problem] In order to achieve the above object, H in this invention
The device for joining beams made of shaped steel to columns welds joining members to the ends of the beams made of H-shaped steel to be joined and to the sides of the columns, respectively, and each joining member has a hole for inserting a bolt and a hole for screwing in the bolt. The bolt insertion hole is provided with an upwardly opening spanner insertion hole and an embedded nut storage hole, and a tightening nut storage chamber is provided at the outlet end of the bolt insertion hole, and the bolt, embedded nut, and tightening nut are inserted into the joining member. The bolt insertion hole of one of the joining members in which the bolt is placed faces the female thread for screwing in the bolt of the other joining member, and with both joining members in close proximity, the bolt is screwed into the female thread of the other joining member and the tightening nut is tightened. The present invention is characterized in that the position of the bolt is stabilized by the following.

[Function] A joining member is welded to each of the two beams and columns to be joined, and the joining members are joined using bolts, embedded nuts, tightening nuts, and female threads.

Since the bolt is stored within the joining member until the joining members are brought close to each other for joining, the bolt does not get in the way of the joining members coming close to each other. Further, during joining, the insertion direction of the bolt is arranged on the same line as the tensile or compressive stress applied to both steel structural members, so that no secondary stress is generated due to joining.

[Example] An example of the present invention will be described with reference to FIGS. 1 to 7.

Figure 1 is a plan view showing the state in which bolts, embedded nuts, and tightening nuts are arranged on each joint member before the beam and column are joined, and Figure 2 is a plan view of the A-
A' sectional view, FIG. 3 is a BB' sectional view, and FIG. 4 is a C-C' sectional view. Moreover, FIG. 5 shows a cross-sectional view showing a state in which a beam and a column are joined by a joining member.

In the figure, reference numeral 1 denotes a joint member made of steel plate or cast, in which a hole 10 for inserting a bolt 2 and a female thread 4 are formed in the horizontal direction, and a spanner insertion hole opening above the hole 10 for inserting the bolt in the vertical direction. 7, a storage hole 16 (see FIG. 6) for the embedded nut 3, and a storage chamber for the tightening nut 5 at the outlet end. Therefore, the bolt insertion hole 10, the spanner insertion hole communicating with the hole, the nut storage hole 16, and the storage chamber for the tightening nut 5 are aligned in a plan view.

These arrangements are arranged between the exit end of the bolt insertion hole 10 provided in one joint member 1 and the female screw thread 4 for bolt screwing formed in the other joint member 1.
The bolts 2 are arranged so that they face each other and are on the same line, and the direction of insertion of the bolt 2 is such that the tension and compressive stress applied to the beam 13 and column 14 to be joined are on the same line.

In addition, 6 is a projection for receiving a spanner for rotating the bolt, 8 is a hole for injecting grout to fix the bolt 2 when the beam 13 and the column 14 are joined by the joining member 1, 9 is the grout, 15 is the diaphragm above and below the column, 18, 19
20 is a web connecting the upper and lower joining members 1; 20 is a splint plate disposed on the front and back sides between both webs 18 and 19;
Reference numeral 21 indicates a bolt for fixing the front and back splints 20.

Next, the procedure for joining the beam 13 and the column 14 made of H-shaped steel will be explained in detail.

Those used for the pillars 14 and beams 13 to be joined, to which the joining members 1 are attached above and below via webs 18 or 19, are manufactured in advance at a factory.

At a construction site, the joining member 1 is welded between the upper and lower diaphragms 15 of the pillar 14 at the same time as the pillar 14 is erected. At this time, the bolts 2 are inserted and stored in the respective bolt insertion holes 10 of the joining member 1, and the embedded nuts 3 and tightening nuts 5 are attached, and the joining member 1 is shown in FIGS. 1 to 4. It is in the state shown.

The joining member 1, to which bolts, embedded nuts, tightening nuts, etc. are attached, is also welded to the beam 13 to be joined at the site.

The beam 13 to be joined is arranged in line with the joining member 1 attached to the column 14, and the joining member 1 attached to the beam 13 and the joining member 1 attached to the column 14 are brought close to each other and face each other.

At this opposed and close position, first, a splint plate 20 is placed on the front and back sides of the webs 18 and 19, and the two webs are temporarily fixed with bolts 21 in a well-known manner.

Next, a spanner is inserted through the spanner insertion hole 7 of the joining member 1, and the bolt 2 in the joining member 1 is rotated forward by engaging the receiving protrusion 6 of the joining member 1. Screw into female thread 4. At this time, the embedded nut 3 serves as a guide for the advancement of the bolt 2.

Once the bolt 2 is completely screwed into the female thread 4, the temporarily fastened webs 18, 19 are permanently fastened with a required number of bolts 21, thereby fixing both webs.

When the webs 18, 19 are fixed by the bolt 21, a spanner is inserted into the gap between the two joining members 1, 1, and the tightening nut 5, which is moving forward together with the bolt 2, is returned to its original position using the spanner. Then, the tightening nut 5 is attached to the embedded nut 3.
The position of the bolt 2 is stabilized by working together with the bolt 2 to bring it into the state shown in FIG.

After that, grout 9 is injected through the grout injection hole 8 to completely fix the bolt 2. At this time, the tightening nut serves to prevent the grout 9 from leaking.

[Effects of the Invention] In this invention, since the joining member is welded to the beam and column to be joined and both joining members are fixed with bolts, it is not necessary to drill bolt holes for joining in the upper and lower flanges of the beam. This prevents the cross section of the base metal from becoming damaged and weakening in terms of strength. Furthermore, there is no need for joining splints, bolt heads, etc. to protrude from the upper ends of the beams, and for example, there is no need to attach C-shaped steel or steel plates to the base material when laying a floor structure.

In addition, since the beam and column are joined by bolts installed on the joining member, the joining bolt does not attach to both base materials as in the past, so it is necessary to use bolts with twice the required strength. There is no.

Furthermore, since the joint is performed using a joining member, frictional joining is not performed under the tension of a high-strength bolt, and the proof strength of the bolt can be fully utilized.

Furthermore, since the joining members can be attached directly to the pillars and beams to be joined, it is no longer necessary to cut a single beam into three parts and connect them to create left and right brackets, as was the case in the past. Moreover, since the bracket part is a joining member, it is short, making transportation work very easy.

Furthermore, since the joining bolt is stored in one of the joining members until the joining members are brought close together for joining, the joining bolt does not get in the way of bringing the joining members closer together. The beams are completely seated. Furthermore, the joining work can be done easily and accurately.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a state before a joining member according to an embodiment of the present invention is joined, FIG. 2 is a cross-sectional view taken along line A-A', and FIG. 3 is a cross-sectional view taken along line B-B'. Fig. 4 is a sectional view taken along the line C-C', Fig. 5 is a sectional view showing the joined state, Fig. 6 is a plan view of the main part showing the joined state of the column and beam in this invention, and Fig. 7 is a sectional view showing the joined state. FIG. 8 is a plan view showing the state of connection between a column and a beam in the conventional example, and FIG. 9 is a side view thereof. DESCRIPTION OF SYMBOLS 1... Joining member, 2... Bolt, 3... Embedded nut, 4... Female thread, 5... Tightening nut, 7... Wrench insertion hole, 10... Bolt insertion hole, 13... Beam made of H-shaped steel, 14... Column, 16... Embedded nut storage hole.

Claims (1)

[Claims] 1 Weld joining members to the end of the beam made of H-shaped steel to be joined and to the side of the column, respectively, provide a bolt insertion hole and a female threaded part for bolt screwing in each joining member, and insert a bolt into the bolt insertion hole. is provided with a spanner insertion hole that opens upward and an embedded nut storage hole, and a tightening nut storage chamber at the outlet end, and a bolt, an embedded nut, and a tightening nut are arranged in the joining member for bolt insertion of one of the joining members. The hole is made to face the female thread for screwing in the bolt of the other joining member, and with both joining members in close proximity, the bolt is screwed into the female thread of the other joining member, and the position of the bolt is stabilized by the tightening nut. A device for joining a beam made of H-shaped steel to a column.