JPS59177453A - Steel bar unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reinforcing bar unit used when reinforcing steel in floor slabs, walls, etc. in reinforced concrete buildings.

Conventionally, the reinforcement arrangement method in such cases is, for example, to transport the reinforcing bars processed at the rebar processing factory to the construction site, bundle them, lift them with a crane, and then arrange the reinforcing bars at the construction site. In this method, reinforcement is placed one by one at the relevant location and connected to width stop bars, etc. by number line or welding, so it takes a lot of time and effort to arrange the reinforcement, and in particular, the large-diameter reinforcing bars that are heavy When using this, there was a problem in that the reinforcement work became even more difficult. There is also the reinforcing bar pre-assembly method, which is used in nuclear power plant facilities, civil engineering construction facilities, etc., but in this method, the reinforcing bars are installed with width stop plates, etc. according to the required spacing of reinforcing bars at the reinforcement locations. Since the unit is constructed, the overall dimensions become large, requiring a wide area rebar unit processing factory, and there are problems in that transportation and lifting are restricted, and handling may be dangerous. Ta.

The purpose of the present invention is to solve the above problems. In the present invention, unidirectional reinforcing bars such as floor slabs and walls are integrated in advance by being connected in parallel in a direction orthogonal to the direction of the extension force to a positioning bar formed in a spiral shape so as to be freely extendable. Then, set the positioning bars at a predetermined location, such as the bottom reinforcement that is placed on the floor slab, and then stretch the positioning bars on both sides to make the multiple reinforcing bars connected to the positioning bars the regular reinforcement pitch. This is to fix these.

Embodiments of the present invention will be described below based on the drawings.

As shown in FIGS. 1 and 2, the reinforcing bar unit of the present invention includes, for example, each arcuate portion of a positioning bar 1 formed in a spiral shape and extendable in the direction of the helical forming force (in the direction of the force indicated by the arrow in FIG. 1). Multiple reinforcing bars 2.2. ...and 3,3
．． ... (In the figures, the reinforcing bars 3, 3 on one side except in Fig. 2 are shown by two-dot chain lines for convenience) are arranged in parallel in a direction perpendicular to the direction of the elongation force and welded. 4,4
．． . . . and 5,5° . . . or by tying wires together. in this case,
Only one positioning bar 1 is shown in the example shown in the first diagram, but two or more may be used depending on the specifications of the bar arrangement location.
゜2,... and 3,3. ...can be combined with...

Also, the diameter of positioning bar 1, reinforcing bar 2, 2, - and 3°3
The number of reinforcing bars 2, 2, .・-・and 3.
3. Each reinforcement pitch, reinforcing bars 2, 2. ...and reinforcing bars 3, 3. . . . is set in advance so that the interval is a required value.

After this reinforcing bar unit is transported to a construction site in an unstretched form and lifted, it is used in the following manner. for example,
When arranging reinforcement to form a floor slab, as shown in FIG. 3, lower end reinforcements 6, 6, .
After placing the positioning reinforcement 1 (only one shown) on top so that it is parallel to each lower end reinforcement, this positioning reinforcement is stretched and reinforcing bars 2, 2, . ...and 3,3. ... with each reinforcing pitch matching the predetermined value, attach the reinforcing bar unit to the lower end reinforcement 6.6. Fixed to... Therefore, the positioning bar 1 acts as a width stop bar. Next, reinforcing bar 2.2°・
・Arrange the upper end reinforcement (not shown) perpendicularly to this. At that time, the positioning bar 1 is attached to the spacer (
It can be used as a horse.

The reinforcing bar unit is also suitable for use as reinforcement in walls, as shown in FIG. That is, vertical reinforcements 7, 7., which are arranged in advance at a required pitch. ..., the reinforcing bars 2 or 3 connected to the gravity end side of the positioning bar 1 are attached to the vertical bars 7, 7, . ... and then fixed or temporarily fixed at right angles to the reinforcing bars 2, 2, . ...and 3,3.・
Fix the reinforcing bar units to the vertical reinforcements 7°7, . . . with the reinforcement pinches of . . . matching the predetermined values.

The reinforcing bar unit of the present invention can also be used for reinforcing circular slabs and foundation plates. In that case, for example, as shown in FIG. 5, the positioning bars 1.1 are stretched into an arc shape and the reinforcing bars 2.
2. ...and 3,3. ... are opened radially so that the parallel spacing becomes the required pitch.

As described above, the present invention connects reinforcing bars to spiral positioning bars in advance to form a unit, and stretches the positioning bars at the reinforcement site to set the reinforcement pitch of the reinforcing bars to the required value. bring about the same effect. That is,
(1) Since the reinforcing bars are connected to the positioning bars without stretching them when processing the reinforcing bar units, the work area is small. (2) The positioning bars are not stretched when the reinforcing bar units are processed. Therefore, compared to conventional pre-assembled products, transportation to the reinforcement site and lifting can be carried out safely with fewer restrictions.

(3) At the reinforcement site, the pitch of reinforcing bars can be easily obtained by simply stretching the positioning bars. (4) Positioning bars can wait their function as width stop bars, and when arranging reinforcement for floor slabs, slabs, etc., positioning bars can be used as spacers for top end reinforcements, When reinforcing, positioning bars can be used to fully utilize gravity to easily obtain the reinforcing pitch in the vertical direction of the stretched reinforcing bars.
Eliminates the need for work auxiliary materials and saves labor.

[Brief explanation of the drawing]

1 shows an embodiment of the reinforcing bar unit according to the present invention, in which Fig. 1 is a perspective view of the unit when it is assembled, Fig. 2 is a partially enlarged perspective view thereof, and Figs. 3 to 5 show the reinforcing bar unit. FIG. 3 is a perspective view, an elevation view, and a plan view showing different usage examples when arranging reinforcement. 1...Positioning bar, 2.3...Reinforcement bar, 4.5...
welding part. that's all

Claims (1)

[Scope of Claims] A reinforcing bar unit consisting of a positioning bar formed in a spiral shape so as to be freely extensible, and a plurality of reinforcing bars connected in parallel to the intersecting positioning bar in a direction perpendicular to the direction of extension.