JPH0633124Y2 - Elastic joist - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to an elastic joist whose length can be adjusted.

“Problems to be solved by conventional techniques and devices” Recently, labor-saving construction methods have been particularly promoted for the construction of steel-framed reinforced concrete structures. At each work place, non-support construction methods are used rather than conventional under-beam support construction. Is being used more often.

This non-support construction method is usually carried out by constructing an aluminum joist d or a joist pipe on a pulling c of a hanger type suspension scaffold b which is hung vertically from a steel frame a of a beam, as shown in FIGS. 8 and 9. e is installed, the formwork f is supported, and construction is performed.

By the way, since the steel cloth frame g of the suspension scaffold b has a certain size, when the effective dimension between the pillars h and h is allocated by the size of the cloth frame, it is almost impossible to divide it regardless of the allocation method. Is.

For this allocation, generally, any type of core distribution (A), core straddle (B) or partial pushing (C) shown in FIG. 10 is used, and a half-sized cloth with a special size is provided at an end or an intermediate part. A frame g'is arranged.

Since a fixed-length aluminum joist cannot be used for this half-length cloth frame g ′, generally, a relatively inexpensive joist pipe is cut and used, and is attached after the steel frame construction is completed.

Therefore, in this case, the preceding ground assembly work on the ground remains useless, and the work at high places increases. In addition, when there is a beam haunch, it is almost impossible to use a standard size aluminum joist, so a joist pipe is used.

By the way, some of the thick timbers can be adjusted to expand and contract (Japanese Patent Publication No. 46-9500 and Japanese Patent Laid-Open No. 63-122867), and it is possible to use this kind of timber as the joist. .

However, this contracted edge thick material is obtained by inserting the sliding edge thick material into one end or both ends of the hollow fixed edge thick material, and in the case of being inserted into both ends, the sliding edge thick material at both ends. The materials are mutually restricted. Therefore, in either case, since the sliding end thick material can be stretched only about one third of the fixed end thick material, the expansion and contraction performance is insufficient and it cannot be widely used as a joist material.

The present invention seeks to eliminate these conventional disadvantages and inconveniences.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a length of about 1
One intermediate part joist member 1 and two end joist members 2 and 2 are provided to connect one side surface of the intermediate joist member 1 and one end joist member 2 and the other side surface of the intermediate joist member 1. And the other end joist member 2 are combined over the entire length by means of dovetail and dovetail groove couplings 11 and 12 so that they can extend and contract freely.
The base end portions of both end joist members 2 and 2 are provided with a screw fastening fixing means for tightening to the middle joist member 1, and each tip of both end joist members 2 and 2 is engaged with a cloth frame or the like. It is characterized in that appropriate engaging means is provided.

"Operation" Because of the above configuration, in use, the two end joist members 2 and 2 are appropriately moved in and out to adjust the length of the whole joist, and the screw fastening means is tightened to adjust its length. Is fixed, and the engaging means at both ends may be engaged with the cloth frame or the like.

Therefore, regardless of the layout between the pillars, everything can be temporarily assembled on the ground with the preceding ground, and the intended purpose can be achieved.

"Embodiment" FIGS. 1 to 7 show an embodiment of the present invention.

The one shown is made of aluminum and is plate-shaped and 800 m long.
By providing one middle part joist member 1 and two end part joist members 2 and 2 inside and outside m, one side surface of the middle joist member 1 and one end joist member 2, and the middle joist member The other side surface of 1 and the joist member 2 on the other end are combined over the entire length with the presence / absence of groove couplings 11 and 12 so that they can extend and contract freely
To prevent galling, the middle joist member 1 is anodized. The material of the middle joist member 1 and the end joist members 2 and 2 may be another metal or other material as long as it has a certain strength.

The intermediate joist member 1 is formed with dowels 11 and 11 on both surfaces over the entire length in the longitudinal direction, and the end joist members 2 and 2 are
The dovetail and dovetail groove couplings 11 and 12 are formed by forming and combining dovetail grooves 21 and 21 slidably engaged with the dovetails 11 and 11 on the respective inner surfaces over the entire length in the longitudinal direction.

In addition, each end joist member 2, 2 is provided with a clamp screw 22, 22, which is a screw tightening fixing means, through the base end portion thereof, and at the tip end thereof, a notch 23, 23 and a locking pin 24, 24. A means for engaging a cloth frame or the like composed of and is provided.

Further, a stopper pin 12 that abuts on one end and the other end of the other surface of the middle joist member 1 and near both ends of the inner joist of each end joist member 2 to determine the end points of entry and exit. , 12,2
There are 5,25.

In use, after adjusting the end joist members 2 and 2 with respect to the middle joist member 1, the clamp screw 2 is used.
Tighten 2,22. With this tightening, there is 1
The gaps between 1, 11 and the dovetail grooves 21, 21 are tightened so that they can be integrated with each other.

[Advantage of the Invention] According to the present invention, one intermediate part joist member 1 and one end joist member 2, 2 having substantially the same length are provided, and one side surface and one side of the intermediate joist member 1 are provided. The end side joist member 2, the other side surface of the middle joist member 1 and the other end joist member 2 are combined so as to extend and contract freely by the presence / absence groove couplings 11 and 12, respectively. Two end joist members 2, 2
Can be put in and out independently of each other without restriction, and the total length of the joists can be greatly expanded or contracted from the length of the middle joist 1 to nearly 3 times the length.

In addition, since the base end portions of the end joist members 2 and 2 for the dovetail joints 11 and 12 are provided with the screw fastening means for fastening to the intermediate joist 1, the screw fastening means of those screws are fixed. By tightening, each with / with groove connection 11,1
2, the dovetails 11 and 11 and the dovetail grooves 21 and 21 are tightened, so that the intermediate joist 1 and the end joists 2 and 2 can be firmly integrated, which is stable and safe. It is also convenient to use because it is possible to use it for each of the end joist members 2 and 2 and appropriate engaging means for engaging with the cloth frame or the like is provided at each tip.

Then, since the length can be adjusted to any desired length,
It can be used without worrying about the layout regardless of the size of the pillars, so that the preceding ground work can be done well, work at high places can be reduced, and even if there is a beam haunch, it can be used without any problems. It can be done, the construction period can be shortened, and the cost can be reduced.

Further, by being made of aluminum, it can be made lightweight and easy to handle.

[Brief description of drawings]

1 to 7 show an embodiment of the present invention, FIG. 1 is a plan view in an expanded state, FIG. 2 is a front view in the same state, FIG. 3 is a front view in a reduced state, and FIG. 2 is an enlarged cross-sectional view taken along line IV-IV in FIG. 2, FIG. 5 is an enlarged side view of the tip portion, FIG. 6 is an enlarged cutaway front view of FIG. 7, and FIG. 7 is taken along line VII-VII of FIG. FIG. 8 is an enlarged cross-sectional view showing a conventional example, FIG. 8 is a cutaway perspective view of an example, FIG. 9 is another cutaway side view, and FIG. 10 is an explanatory view. 1 ... Middle part joist 2 ... End part joist 11 ... Yes, 12 ... Stopper pin 21 ... Yes Groove, 22 ... Clamp screw 23 ... Notch, 24 ... Locking pin 25 ... Stopper pin a ... Beam steel, b ... Suspension scaffolding c ... Large pulling, d ... Aluminum joists g ... Cloth frame, g '... Half cloth frame h ... Pillars

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Teruo Hoshi 8-21-1, Ginza, Chuo-ku, Tokyo Stock company Takenaka Corporation Tokyo Main Store (72) Inventor Mikio Takenoshita 8--21, Ginza, Chuo-ku, Tokyo No. 1 Takenaka Corporation Tokyo Main Store (72) Inventor Nobuyuki Kurosaki 8-21-1, Ginza, Chuo-ku, Tokyo Stockholder Takenaka Corporation Tokyo Main Store (72) Inventor Masaru Okada East Arakawa-ku, Tokyo Nippori 4-161-1 Sanshin Equipment Co., Ltd. (72) Inventor Teiji Hagimori 5-15-18 Nishimachi, Kokubunji, Tokyo (72) Inventor Seiji Seto Oyamamachi Oyamamachi, Sunto-gun 790-1 (56) ) References JP-A-63-122867 (JP, A) JP-B-46-9500 (JP, B1)

Claims (1)

[Scope of utility model registration request] 1. An intermediate part joist member 1 and two end joist members 2 and 2 having substantially the same length are provided, and one side surface of the middle joist member 1 and one end joist member 2 are provided. And the other side surface of the middle joist 1 and the other end joist member 2 are combined so as to extend and contract slidably by the dovetail and groove joints 11 and 12, respectively. Appropriate engaging means for screwing and fixing means for tightening to the intermediate joist 1 at the base ends of the members 2 and 2, and for engaging the respective tips of both end joists 2 and 2 with a cloth frame or the like. A stretchable joist that is characterized by