JPH0776836A - Connection member of earth retaining h-shaped steel - Google Patents

Abstract

PURPOSE:To extremely facilitate connection works in the field and eliminate risks of a working miss, by fitting in advance a male metal connector and a female metal connector to both earth retaining H-shaped steels and fitting both metal connectors with each other. CONSTITUTION:The junction part 11 of a male metal connector 10 is fitted to one of earth retaining H-shaped steels 1 in advance in a factory and the junction part 21 of a female metal connector 20 is fitted to the other of earth retaining H-shaped steel 2. Both H-shaped steels 1, 2 are transferred in the field and both connectors 10, 20 are butt-jointed. Next, both protrusions 12, 12 of the male metal connector are inserted in both fitting grooves 22, 22 of the female metal connector 20. Subsequently, when a key stopper 33 provided in the male metal connector 10 is drawn, a lock key 30 is repelled by springs 31, 31 and the rear part thereof is left in the key groove 13 of the male metal connector 10 and the front part thereof is moved forward in the key receiver 23 of the female metal connector 20. In this way, both metal connectors 10, 20 are joined. Accordingly, both H-shaped steels are connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a member for joining Yamadome H-shaped steel materials.

[0002]

2. Description of the Related Art When excavating the ground for a foundation work of a building, a sheet pile is struck around the excavated ground to prevent the ground around the excavated ground from collapsing. In order to prevent inward lodging, H-shaped steel materials called bellows are installed along the sheet piles, and H-shaped steel materials called cut-offs are installed between right and left wakes and between front and back wakes. . These Yamadome H-shaped steel materials are usually used by joining a plurality of H-shaped steel materials by abutting each other, and conventionally, as a means of the joining, flat plates are welded to the abutting ends of the left and right H-shaped steel materials, Bolt these flat plates together,
Moreover, the attachment plates were applied to the upper and lower surfaces of the H-shaped steel material, and the left and right H-shaped steel materials and this attachment plate were bolted to each other.

[0003]

The conventional method of joining H-shaped steel materials of Yamadome is the bolt fastening. Since the strength of fastening one bolt is limited, a large number of bolts must be used. However, since this bolt must be fastened on site, the work period will be prolonged, and if the bolt is not fastened, work safety may be impaired. Therefore, an object of the present invention is to provide a joining member for a Hamadome H-shaped steel material, which can shorten the construction period of the joining work for a Hamadome H-shaped steel material, and which is less likely to cause a worker's work mistake.

[0004]

The present invention has been made to achieve the above object, that is, Ichino Yamadome H
It has a connecting part for connecting to the shaped steel material at the rear part, and a projecting part that extends in a direction orthogonal to the axial direction of the H-shaped steel product is formed at the front end, and the base of the projecting part is reduced in width to form one end side of the projecting part. The male joint hardware with the key groove formed on the back, the lock key inserted into the key groove of the male joint metal, and the connecting portion for connecting to other Yamadome H-shaped steel material at the rear portion, and the male joint at the front end One end of the key receiving part is formed by forming a wide fitting groove that fits with the protruding part of the metal object, forming a key receiving part for storing the lock key on one end side of the fitting groove, and forming a bottom on the other end side. Yamatome H, which has a female joint metal piece provided with a ledge protruding toward the front end on the side, and a spring for elastically rocking the lock key to the key receiving part side of the female joint metal piece.
It is a joining member of shaped steel materials.

[0005]

The present invention will be described with reference to the drawings. 1 to 4 show a first embodiment of the present invention, the joining member of this embodiment is
It is composed of a male type metal fitting 10, a female type metal fitting 20 and a lock key 30. First, a connection portion 11 for connecting to the H-shaped steel material 1 is formed at the rear of the male-type joining hardware 10,
Two protrusions 12, 12 extending in the vertical direction are formed at the front end, and each protrusion 12 is formed such that the width of its root is reduced. Although the drawing shows the case where the root of the protrusion 12 is narrowed at an acute angle for simplification, it is actually preferable to smoothly reduce the width in order to avoid concentration of stress. A key groove 13 is formed on the upper side of the protrusions 12, 12 so as to be bored rearward, and the key groove 13 and the upper surface of the male-type metal fitting 10 are communicated with each other by a key fastening hole 14. On the other hand, a connecting portion 21 for connecting to another H-shaped steel material 2 is formed in the rear part of the female-type metal fitting 20, and two fitting grooves 22, 22 extending in the vertical direction are formed in the front end. . Each of the fitting grooves 22 has a bottom and is formed so as to widen so as to fit with each of the protrusions 12 of the male-type joined metal article. Further, a key receiving portion 23 is formed on the upper side of the fitting grooves 22 and 22, and a ledge 24 projects forward from the rear upper surface of the key receiving portion 23. In the center of the key receiving portion 23 and the shelter 24, the key return groove 2 cut out rearward.
5 are provided. The lock key 30 is formed in a flat plate shape and is inserted into the key groove 13 of the male-type metal fitting, and a pair of springs 31, 31 are compressed and attached to the rear portion. Further, a key fastening hole 32 is formed on the upper surface of the lock key 30, and a key fastening tool 33 is attached from the key fastening hole 14 of the male type metal fitting to the key fastening hole 32.

This embodiment is formed as described above,
The method of using this joining member will be described below. First, the H-shaped steel materials 1 and 2 on both ends are connected to the connecting portions 11 and 21 of the joining hardware. In the drawings, this connection is shown by bolting, but it is also possible to connect by welding. Also, these bolts are fastened or welded at the factory. Next, both joint hardware 10, 2 with both H-shaped steel materials 1, 2 attached
0 is brought to the site, both joining hardware 10, 20 are butted, and male joining hardware 10 is hung by a crane to keep it slightly higher than female joining hardware 20, and the crane is gradually lowered as shown in FIG. Both protrusions of male type metal fittings 1
2 and 12 are inserted into both fitting grooves 22 and 22 of the female-type joining hardware. Then, when the key fastener 33 is pulled out, the lock key 30 is repulsed by the spring 31 as shown in FIG.
The rear part remains in the key groove 13 of the male-type metal fitting, but the front part moves to the key receiving part 23 of the female-type metal fitting,
Moreover, it is pressed by the spring 31 and stays at that position. In this state, both protrusions 12 and 12 of the male-type metal joint
Is inserted into both fitting grooves 22, 22 of the female-type metal fitting, the male-type metal fitting 10 cannot move in the left-right direction. Further, since the base of the protruding portion 12 is formed with a reduced width and the fitting groove 22 is formed so as to be widened so as to fit with the protruding portion 12, the male joining hardware 10 also moves in the front-rear direction. I can't. Further, the fitting groove 22 has a bottom, and the lock key 30 moves and fits into the key receiving portion 23 above the fitting groove.
Since the shelter 24 overhangs the upper part of the, the male joining hardware 10 cannot move vertically. In this way, both joining metal fittings 10 and 20 are fastened, and therefore both Yamadome H type steel materials 1 and 2 are also fastened. As described above, according to the present embodiment, since the work at the site is performed by fitting the both metal fittings 10 and 20 together and pulling out the key fastener 33, the work at the site can be reduced and the construction period can be shortened. In addition, there is no risk of work safety being compromised due to work mistakes.

Next, when this fastening is released, a burl or the like is inserted into the key return groove 25 of the female-type joined metal article, and the lock key 30 is pushed back to the male-type joined metal article 10 side against the elastic force of the spring 31. In that state, if the key fastener 33 is attached to the key fastening hole 32 of the lock key through the key fastening hole 14 of the male joining hardware, the protruding portion 12 of the male joining hardware is fitted into the fitting groove 22 of the female joining hardware. Can be pulled out,
Therefore, the fastening can be released. When it is not necessary to release the fastening, it is not necessary to provide the key return groove 25 in the female type metal fitting.

Next, FIG. 5 shows a second embodiment. Generally, in the case of cutting, the H-shaped steel materials 1 and 2 are arranged in an I shape with respect to the horizontal ground surface, and therefore, the connecting portions 11 and 21 of the two metal joints are
It suffices if they are provided up and down as shown in FIGS. However, since the H-shaped steel materials 1 and 2 are arranged in an H shape with respect to the horizontal ground surface in the abdomen uplifting operation, in the configuration in which the connection portions 11 and 21 are provided above and below, the work of fastening both the joining hardware 10 and 20 Will be done in the horizontal plane. That is, male type metal fitting 1
Since the crane that hangs 0 will be moved in the horizontal direction, the workability will be worse than when lowering the crane.
In this case, it is possible to separately manufacture a metal joint having the connecting portions 11 and 21 provided at the front and rear, but in the second embodiment, the connecting portions 11 and 21 are provided at the top and bottom and the front and rear to form a box shape. However, the crane can be lowered and fastened together simply by changing the connecting direction in both the case of cutting and the case of raising the belly.

Next, FIG. 6 shows a third embodiment. Since the ledge 24 protruding to the key receiving portion of the female-type metal fitting is configured to allow the protruding portion 11 of the male-type metal fitting to pass through, the ledge 24 can be extended to the front end surface of the female-type metal fitting 20. Can not. On the other hand, in the first and second embodiments, as shown in FIGS. 1 to 5, the upper part of the key groove 13 of the male-type joint metal is formed flat, so that as shown in FIG. A gap is formed between the front end surface of the female joint hardware 24 and the upper front end surface of the male joint hardware 10 in a fastened state. Since this void may hinder a worker's safe walking, it is preferable to cover it with a lid. However, in this third embodiment, the overhanging portion 15 that extends forward is formed on the upper front end face of the male-type metal fitting 10. Then, there is no need to cover with a lid. However, if the protruding portion 15 also closes the key return groove 25 of the female-type joint metal, the fastening cannot be released. Therefore, when closing the key return groove 25, a lid is used.

[0010]

As described above, according to the present invention, the joining work of the Hamadome H-shaped steel material performed on-site becomes remarkably easy, and the risk of inducing a work mistake is remarkably reduced.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view showing a male joint hardware and a lock key according to the first embodiment.

FIG. 3 is a vertical cross-sectional view showing the fastening process of the first embodiment.

FIG. 4 is a vertical cross-sectional view showing the completion state of fastening as well.

FIG. 5 is a perspective view showing a fastening completion state of the second embodiment.

FIG. 6 is a vertical cross-sectional view showing a completed fastening state of the third embodiment.

[Explanation of symbols]

10 ... Male joining hardware 11 ... Connection part 1
2 ... Protruding part 13 ... Key groove 14 ... Key fastening hole 1
5 ... Overhanging part 20 ... Female joint metal fitting 21 ... Connection part 2
2 ... Fitting groove 23 ... Key receiving part 24 ... Fence 2
5 ... Key return groove 30 ... Lock key 31 ... Spring 3
2 ... Key fastening hole 33 ... Key fastening tool 1, 2 ... Yamadome H type steel

Claims (3)

[Claims] 1. A connecting portion for connecting to one Yamadome H-shaped steel material is provided at a rear portion, and a protruding portion extending in a direction orthogonal to an axial direction of the H-shaped steel material is formed at a front end, and a root of the protruding portion is formed. A male type joint metal member formed by reducing the width and having a key groove formed on one end side of the protruding portion, a lock key inserted into the key groove of the male type joint metal member, and another mountain retaining H type steel material. A key holder that has a connecting portion at the rear and has a fitting groove that widens in the front end and that fits with the protruding portion of the male joint metal, and stores the lock key at one end of the fitting groove. And a bottom formed on the other end side of the key receiving part, and a female joint metal object having a ledge projecting toward the front end on the one end side of the key receiving part; A joining member of a mountain retaining H-shaped steel material having a spring that elastically springs toward the side. 2. The joining member according to claim 1, wherein a key return groove is provided on the rear side of the key receiving portion and the back of the female joining hardware. 3. A joining member for a Hamadome H-shaped steel material according to claim 1 or 2, wherein the connecting portions of both joining metal parts are formed in a box shape.