JPS634100Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial field of application" This invention relates to a reinforcing bar spacer for concrete columns.

``Prior Art'' Conventionally, a reinforcing bar spacer for concrete columns has been developed in which a plurality of arc-shaped reinforcing bar insertion grooves are cut along the outer periphery of a donut-shaped annular plate. In this spacer, the reinforcing bar insertion groove is arc-shaped and the width of the entrance part is smaller than the inner diameter of the arc-shaped insertion groove, so when the round steel reinforcing bar is fitted into this insertion groove, the reinforcing bar is difficult to pass. Therefore, it is necessary to bend the entrance part slightly, and when the entrance part is bent slightly, the width of the entrance part expands and there is a problem in that the fitted reinforcing bars are likely to escape.

"Problem that the invention aims to solve" The purpose of this invention is to obtain a rebar spacer for a concrete column in which a rebar that fits into the inner circumference of a rebar insertion groove formed on the outer edge of a ring plate can be easily inserted and there is no risk of the rebar escaping the groove after insertion.

"Means for Solving the Problem" This proposal involves cutting a plurality of U-shaped reinforcing bar insertion grooves along the outer periphery of an annular plate, and bending the outer periphery in the middle of these insertion grooves to form a bent part. It is constituted by a reinforcing bar spacer of a concrete column whose both ends are slightly extended in opposing directions into the entrance portion of the insertion groove to form a check piece for the outer U-shaped reinforcing bar insertion groove.

"Action" Therefore, the reinforcing bar 5 is inserted from the entrance of the U-shaped reinforcing bar insertion groove 3.
When pushed into the groove 3, the check valves 4a, 4a are bent into the groove 3, and the reinforcing bar 5 is fitted in contact with the bottom of the groove 3. In that state, the same check valves 4a, 4a
Due to its elasticity, it returns to its original state slightly and hooks on the reinforcing bar 5, as shown in FIG. 6, and holds it in the groove 3. Such an operation can be automatically performed by an intermittent reinforcing bar press-in machine while intermittently rotating the annular plate 1 around the center line, and a reinforcing bar basket is automatically formed.
The reinforcing bar cages are stored in piles or inserted into a rotary formwork, concrete or mortar is poured into them, and the hollow reinforced concrete columns 6 are manufactured by curing, hardening, and demolding.

"Example" The inner peripheral edges 1a, 1a of the opposing annular plates 1, 1 are connected, the annular groove 2 is formed between the opposing annular plates 1, 1 along the outer periphery, and the signs of the opposing annular plates 1, 1 are matched. A plurality of U-shaped reinforcing bar insertion grooves 3 are cut and formed at the positions, and the outer peripheral edges of the annular plates 1, 1 located in the middle of the insertion grooves 3, 3 are bent in opposite directions, and the bent portions 4, 4 are bent. Both ends are slightly extended in opposite directions into the entrance of the insertion groove 3 to form check pieces 4a, 4a of the U-shaped reinforcing bar insertion groove 3. The opposing annular plates 1, 1 are circular annular plates, and the inner circumferential edges 1a, 1a are bent by pressing to face each other, and the opposing parts are connected by spot welding. The number of reinforcing bar insertion grooves 3 is 8 to 76, and they are cut at equal intervals. Further, the annular plate 1 can be used alone. In addition, what is shown by 6 in the figure is a concrete column, 6a is the outer peripheral surface of the concrete column 6, and 6
b is the inner circumferential surface of the column 6.

``Effects'' Since the present invention is constructed as described above, the reinforcing bars 5 can be inserted and fitted into the U-shaped reinforcing bar insertion groove 3 very easily by pressing, and there is no fear that the reinforcing bars 5 will come off from the groove 3 after insertion, and the reinforcing bars 5 can be quickly and easily inserted into the U-shaped reinforcing bar insertion groove 3. There is an advantage in forming a shaped rebar cage.

[Brief explanation of the drawing]

Figure 1 is based on the proposed spacer. A side view showing a concrete column, Figure 2 is a vertical cross-sectional view taken along line A-A in Figure 1, Figure 3 is a partially enlarged plan view of Figure 2,
FIG. 4 is an enlarged vertical sectional view taken along the line B--B in FIG. 2, FIG. 5 is a diagram of the state before reinforcing bars are inserted, and FIG. 6 is a diagram of reinforcing bars inserted. 1... Annular plate, 3... U-shaped reinforcing bar insertion groove, 4...
...Bent part, 4a... Check piece.

Claims (1)

[Scope of utility model registration request] A plurality of U-shaped reinforcing bar insertion grooves are cut along the outer periphery of the annular plate, and the outer periphery in the middle of these insertion grooves is bent so that both ends of the bent portions are opposed to the entrance of the insertion groove. A reinforcing bar spacer for a concrete column that is slightly extended in the direction to form a check piece for the U-shaped reinforcing bar insertion groove.