JPH06322834A - Joint member for floor frame - Google Patents

Abstract

PURPOSE:To enhance connecting strength by connecting a joint member for floor frame to the cut end part of a beam, and connecting a faying surface part projecting to nip the cut end part to the inner surface side of a girder. CONSTITUTION:A joint member 2 having a hat-like section is interposed in the.connecting part between a girder 1 consisting of a long groove-like lightweight shape steel constituting a floor frame and a beam 3 consisting of a square steel pipe. The joint member 2 is housed in the inside of the girder 1 in the state where it is enclosed by the upper and lower flange surfaces 1a, 1b and web surface 1c of the girder 1. The end surface 3a of the cut end part 3A of the beam 3 is then connected to the top surface part 2b of the joint member 2, and the faying surface part 2a is spot-welded to the web surface 1c of the girder 1. Thus, the deflection and deformation by an added load is prevented, and connecting strength can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint member for a floor frame of a unit structure used in a steel frame unit house or the like.

[0002]

2. Description of the Related Art Heretofore, as a joint member of this type, that is, a so-called joint fitting, one described in, for example, JP-A-2-194232 has been known. According to this, as shown in FIG. 11 in which the main part is extracted, the long groove-shaped large beam 101 made of lightweight shaped steel and the small beam 102 made of square steel pipe, which form the floor frame, are joined with the joint member 103 interposed therebetween. However, in this case, the joint member 103 is merely formed in a U-shaped cross section. And the large beam 101
The upper and lower flange surfaces 101a and 101b of the girder 101 are joined together so that the two are joined together in the middle.
The upper and lower joint surface portions 103a, 1 of the joint member 103
03b are on the upper side, respectively, and each joint surface portion 1
A method of arc-welding a predetermined portion X of the contact portion of 03a and 103b is adopted.

[0003]

However, in the above-mentioned conventional structure, since the joint member 103 is joined to the beam 102 made of a long rectangular steel pipe, both flange surfaces 101a and 101b of the girder 101 are joined. A concentrated load is easily applied to the upper and lower joint surface portions 103a and 103b facing each other along the recessed direction of the entire floor frame. Particularly, the joint surface portion 103a is indicated by a bending amount m as shown by an imaginary line in FIG. It becomes easy to receive bending deformation.

On the other hand, when the cross-sectional shape of the beam girder 102 becomes small, the amount of bending n of the beam girder 102 itself becomes large. Therefore, the large amount of bending m of the joint surface portion 103a means that the dent deformation of the entire floor frame is large. Become. As a result,
The structure of the joint member 103 is a factor that limits the weight reduction of the unit structure. To give a specific numerical example, when the cross-sectional shape of the beam is 125 × 75,
For example, the horizontal spacing between adjacent beam members 102 is 750 mm.
The above settings cannot be put to practical use.

Further, in order to obtain a predetermined joint strength, the work of keeping the amount of the beam 102 in and out in the longitudinal direction constant, that is, as shown in FIG. 8, the upper and lower joint surface portions 103a and 103b with respect to the flange width F are fixed. The troublesome work management found in the work of adjusting the joint widths Sa and Sb is required.

The present invention has been made to solve the above-mentioned problems of the prior art, and it is possible to prevent dent deformation due to the weight of the floor frame as much as possible and to reduce the weight as much as possible. Moreover, it is an object of the present invention to provide a floor frame joint member of a unit structure which is advantageous in terms of work management.

[0007]

In order to achieve the above object, the main structure of the present invention is a joint member for a floor frame which is interposed at a joint portion between a long groove-shaped girder and a square tubular girder constituting a floor frame. A part is joined to the cut end portion of the beam, and a joining surface portion protruding so as to sandwich the cut end portion is configured to be joined to a web surface or a flange surface on the inner surface side of the girder. Characterize.

In this case, the joint member according to the present invention has a shape in which a main body having a hat-shaped cross section, a flat plate shape, and a U-shaped cross section is extended, as well as a pair of L-shaped and inverted L-shaped. It may be a combination of joining pieces.

[0009]

[0010]

The joint member according to the present invention is arranged so as to be housed inside the girder as a whole, and since the joint surface portion makes surface contact with the web surface or the flange surface inside the girder, the joint member is not directly attached to the joint surface portion. It acts rigidly against the force in the direction of the depression due to the weight of the floor frame, without any bending deformation. Further, in the structure in which the joint surface portion is projected to the outside of the beam, it is possible to easily realize a state in which both electrodes of the welding gun in the spot welding machine are clamped.

[0011]

FIG. 1 shows a first embodiment of the present invention. In FIG. 1, a girder 1 made of lightweight steel having a long groove and constituting a floor frame of a unit structure, having a hat-shaped cross section. A joint member 2, the joint member 2, and a beam 3 made of a square steel pipe are shown.

As shown by an arrow H, the joint member 2 is housed inside the girder 1 while being surrounded by the upper and lower flange surfaces 1a and 1b of the girder 1 and the web surface 1c. The end surface 3a of the cut end portion 3A of 3 is joined to the flat top surface portion 2b of the joint member 2, and the joint surface portion 2 which is a hem surface portion protruding to both outsides of the top surface portion 2b.
The a is joined to a predetermined portion of the web surface 1c in a substantially complete surface contact state.

2 (a) to 2 (c) show the state after welding of the first embodiment, and FIG. 2 (a) is a side view thereof, FIG. 2 (b). Is seen from the front, Fig. 2
(C) shows a perspective view of the joint between the joint member 2 and the beam 3.

Since this embodiment is constructed in this way, when joining the joint member 2 to the girder 1,
Spot welding can be used. That is, as shown in FIG. 1, since the web surface 1c and the joining surface portion 2a are in a plate-overlapped state, there is no obstacle at least in the vicinity of the penetrating direction of each welding point Y, and at each welding point Y, It becomes possible to realize a pinching state by both electrodes 4a, 4b of the spot welding gun 4.

As for the state after welding, the joint member 2 is in the state of being housed in the groove-shaped girder 1,
Since the front surfaces of the flange surfaces 1a and 1b of the girder 1 are flat surfaces without obstacles such as protrusions, for example, as shown in FIG. 2B, the upper flange surface 1a is used as a reference surface and other outer wall units are used. It is possible to easily perform an up / down / left / right alignment work and the like when installing the stud 5.

Further, since the joint member 2 is housed inside the girder 1, the strength of the girder 1 is exclusively governed by the proof stress against the force of the floor frame in the direction of depression, so that the joint surface portion is substantially formed. The bonding strength of 2a is increased.

Since spot welding becomes possible, as shown in FIG. 1, the girders 1 etc. constituting the floor frame during the welding work are run on the belt conveyor 6 to perform the welding work continuously. So-called full automation is possible.

FIGS. 3A to 3C show a second embodiment. The joint member 20 is composed of a pair of joint piece bodies 20A and 20B, and both joint piece bodies 20A and 20B. The component pieces 20Aa and 20Ba each having a L-shaped cross section and an inverted L-shaped cross section are joined so as to sandwich the cut end portion 3A of the beam 3 while the two side surfaces of the beam 3 are joined together. Joining surface part 2 which is another component piece projecting in mutually opposite directions
0Ab and 20Bb are joined to the web surface 1c of the girder 1.

The joint surface portion 2 in the second embodiment.
At the time of joining the 0Ab and 20Bb to the web surface 1c, as in the first embodiment described above, both are in a plate overlapping state and there are no obstacles near the welding point Y, so spot welding is possible.

FIGS. 4 and 5 (a) and 5 (b) show a third embodiment, which is a joint member 30 of this embodiment.
Is formed in a rectangular flat plate shape, and the cut end surface 3 of the beam 3 is formed.
a is joined to a substantially central portion of the joint member 30, and a joint surface portion 30a of the joint member 30 which projects around the beam 3 is welded by spot welding. The cut end surface 3a of the beam 3 is arranged at the approximate center position of the joint member 30 but near the lower edge so that the weight of the beam 3 can be received by the lower flange surface 1b of the beam 1 as widely as possible. It has become.

FIG. 6 shows a fourth embodiment,
In the joint member 40 of the present embodiment, the main body 40A has a U-shaped cross section, and the beam 3 is formed inside the main body 40A.
While being joined so as to embrace the cut end portion 3A, the cut end portion 3A extends outwardly from the opposed upper end edges 40Aa and 40Ab of the main body portion 40A, and has a surface substantially orthogonal to the cut end surface 3a. Joint surface 40 integrally formed on the
a and 40b are formed.

The joint surfaces 40a and 40b are respectively joined to the inner side of the upper flange surface 1a of the girder 1, but the joint surfaces 40a and 40b also have no obstacles in the direction of penetrating the welding point Y. It can be joined to the flange surface 1a by spot welding. With such a configuration, the force in the direction of the floor frame's depression is reduced by the joining surface portions 40a, 40a.
b, the joint surface portions 40a, 40b
Is inside the girder 1 and has lower end edges 40Ac, 40A.
Since d will be supported by the lower flange surface 1b,
The action of directly deforming the joint member 40 itself does not occur.

FIG. 7 shows a fifth embodiment.
The joint member 50 of the present embodiment is composed of a pair of joining piece bodies 50A and 50B having a U-shaped cross section and an inverted U-shaped cross section.
The respective back side portions 50Ac and 50Bc are joined so as to sandwich the beam 3, while the back side portions 50Ac and 50Bc are a pair of laterally extending surface portions that integrally extend and open in mutually opposite directions. Of the surface portions 50Aa and 50Ab, and 50Ba and 50Bb, the joint surface portions 50Aa and 50Ba are joined to the corresponding upper flange surface 1a. The lower joint surface portion 50Ab,
And 50Bb are formed, the proof strength against the force of the floor frame in the recessed direction can be described in the same manner as the description of the fourth embodiment.

In each of the above embodiments,
The girders 1 and the girders 3 themselves can be used as they are without changing the conventional ones.

Although one embodiment of the present invention has been described in detail above with reference to the drawings, the specific structure is not limited to this embodiment, and a design change or the like within a range not departing from the gist of the present invention is also possible. Included in the invention.

For example, the joint member of the present invention has an increased flexural strength, and as a result, it is possible to change the design such as changing the thickness of the joint member according to the increased strength.

Specifically, the joint member 30 according to the third embodiment changes its plate thickness according to the plate thickness of the girder 1. For example, when the plate thickness of the girder 1 is 3.2 mm, it is set to 4.5 mm, and when the plate thickness of the girder 1 is 4.5 mm, it is set to 3.2 mm.

In addition, for example, in the third embodiment, since the joint member 30 is a flat plate, the entire surface thereof is in contact with the web surface 1c of the girder 1. Therefore, the bending of the joint member 30 itself can be completely ignored, and the interval between adjacent beam members 102, which was conventionally limited to 750 mm, can be set to 900 mm, which is the reference value of the living room module, for example. Become.

[0029]

As described above, according to the first aspect of the present invention, in the joint member for the floor frame interposed in the joint portion between the long groove-shaped girder and the rectangular tubular girder constituting the floor frame, the girder of the girder is provided. Having a portion to be joined to the cut end portion, and a joining surface portion formed so as to project to both sides with the cut end portion sandwiched, being configured to be joined to the inner web surface or flange surface of the girder. Therefore, the joint member according to the present invention is accommodated inside the girder, and the proof stress against the force of the floor frame in the direction of the depression is exclusively controlled by the strength of the girder. The bonding strength of the is increased. In addition, since the joint surface is in surface contact with the flange surface or the web surface of the girder, spot welding is possible, so that the quality of the joint can be kept uniform and high, and the work is simplified. Therefore, it is possible to contribute to full automation of the steel frame unit structure, improvement of productivity, and cost reduction.

Further, according to the inventions of claims 1 to 6, in particular, since the entire joint surface portion is accommodated inside the girder, surface contact between the joint surface portion and the flange surface or the web surface of the girder is achieved. It is easy to secure the state, and in order to obtain a predetermined joining strength, it is possible to omit troublesome work management such as keeping the amount of the beam in and out in the longitudinal direction constant.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view showing the configuration of a first embodiment of the present invention.

FIG. 2 is a view showing a joint state of joint members in FIG.

FIG. 3 is a diagram showing a configuration of a second exemplary embodiment.

FIG. 4 is a partially exploded perspective view showing the configuration of a third embodiment.

5 is a diagram showing a joint state of the joint members shown in FIG.

FIG. 6 is a perspective view showing a configuration of a fourth exemplary embodiment.

FIG. 7 is a perspective view showing a configuration of a fifth embodiment.

FIG. 8 is a perspective view illustrating a configuration of a conventional joint member.

[Explanation of symbols]

1 girder, 1a, 1b flange surface, 1c web surface, 2, 20, 30, 40, 50, joint member, 2a, 20Ab, 20Bb, 30a, 40Ab, 40B
b, 50Aa, 50Ba joining surface portion, 3 beam, 3A cut end portion, 3a cut end surface 20A, 20B, 40A, 40B, 50A, 50B joining piece body.

Claims (6)

[Claims] 1. A joint member for a floor frame interposed in a joint portion between a long groove-shaped girder and a square tubular girder constituting a floor frame, the joint member having a portion joined to a cut end portion of the strut, and the cut portion. A joint member for a floor frame, characterized in that a joint surface portion formed so as to project on both sides with an end portion sandwiched therebetween is configured to be joined to an inner web surface or a flange surface of the girder. 2. The cross-section has a hat shape, and the end face side of the cut end of the beam is joined to the back face portion on the top face side, while the joint face parts on both hem face sides are respectively attached to the web surface inside the girder. It joins, The joint member for floor frames of Claim 1 characterized by the above-mentioned. 3. The main body has a U-shaped cross section and is joined inside the main body so as to embrace the cut end of the beam, while the opposite end edges of the main body are opposed to each other. 2. The joint surface portions, which are formed so as to respectively project from the portions and have a surface that is substantially orthogonal to the cut end surface of the cut end portion, are joined to the inner flange surface of the girder, respectively. Joint member for floor frame. 4. A joint piece body, which comprises a pair of joint piece bodies having an L-shaped cross section and an inverted L-shaped cross-section, and the joint end portions of the beam are sandwiched by the constituent piece portions of each one of the joint piece bodies. And arranging each of the constituent piece portions extending to each one of the corresponding side surfaces of the cut end portion, and joining each joint surface portion, which is the constituent piece portion extending to each other, to the inner web surface of the girder. The floor frame joint member according to claim 1. 5. A pair of joint pieces each having a U-shaped cross section and an inverted U-shaped cross section as a whole, and the two joint pieces are joined to each other so that the cut end of the beam is sandwiched between the back sides of the joint pieces. Place one body,
While joining each of the back side portions to the corresponding side surfaces of the cut end portion, a joint surface portion which is a pair of side surface portions extending so as to open in mutually opposite directions of both joint piece bodies is provided inside the girder. The floor frame joint member according to claim 1, wherein the joint members are respectively joined to both corresponding flange surfaces. 6. A flat plate-shaped member, wherein an end face side of a cut end of the beam is joined to a substantially central portion, and a joining face portion protruding to an outer peripheral side of the cut end of the beam is inside the girder. The floor frame joint member according to claim 1, wherein the joint member is joined to the web surface.