JPH0214604Y2 - - Google Patents

Description

[Detailed explanation of the invention] Conventionally, when loosening a coupler nut due to insufficient threaded length between the threaded reinforcing bar and the coupler, the coupler nut was hit in the loosening direction with a hammer or the like. It had the disadvantage of damaging the reinforcing steel.

Therefore, in order to eliminate the above-mentioned defects, the present invention consists of two half-pieces that can be opened and closed like a split metal type, and can be attached and detached from the side at any desired location on the threaded reinforcing bar. When the tightening machine is driven by engaging the rotating wrench of the tightening machine with this and the locking spanner of the tightening machine with the coupler nut, the rotating spanner of the tightening machine is fixedly supported by the threaded reinforcing bar. This invention relates to a reaction force receiver for a coupler nut tightening machine for threaded reinforcing bars, which allows the tightening machine to mechanically easily and quickly loosen or tighten coupler nuts, which is useful in practice. .

The structure of one embodiment of the present invention shown in the drawings will be described as follows: 1 is a threaded reinforcing bar used for constructing concrete, 2 is a coupler thereof, and 3 is a coupler nut.

A is a split metal type reaction force receiver, and one end of the upper and lower half-cut pieces 5, 5' having flanges 4, 4' at one end is a recess on both sides of the flange 4 of the half-cut piece 5. The bolts 7 inserted into the through holes of the flange 4 and screwed into the screw holes of the half-cut pieces 5' are tightened and fixed in the inside of the flange 4. , bolts 9 inserted into the upper and lower holes of the joint piece 8, respectively, are inserted into the half-cut piece 5,
It is screwed into the screw hole 5' and fixed by the joint pieces 8 on both sides to form a reaction force receiver a, which has a hexagonal outer circumferential surface and a circular flange at one end. On the inside, there is an oval hole 1 that fits into the threaded reinforcing bar 1.
0 and one end of the oval hole 10 is provided with a circular recess 11 concentric therewith.

Reference numeral b denotes a coupler nut tightening machine having the same structure as the conventional one, which loosens the coupler nut 3 when driven in one direction, and tightens the coupler nut 3 when driven in the other direction. 12 is the main body, 13 is a locking spanner, 14 is a rotating spanner, 15 is a rotating spanner 14
The arc gear 16 is a lug that meshes with the arc gear 15.

Note that A in FIG. 7 indicates a concrete wall.

Next, the effect will be explained. In concrete construction, when connecting threaded reinforcing bars 1 and 1 one after another using coupler 2 and coupler nut 3, it may be necessary to loosen coupler nut 3 because the threaded length of threaded reinforcing bar 1 and coupler 2 is insufficient, etc. In some cases, the half-cut pieces 5, 5' of the reaction force receiver a are fitted onto the threaded reinforcing bar 1 from above and below at the required locations of the threaded reinforcing bar 1, and one end of the half-cut pieces 5, 5' is secured with the bolt 7. ,
The reaction force receiver a is assembled by connecting the other ends with joint pieces 8 and bolts 9, and the hole 10 of the reaction force receiver a is fitted into the threaded reinforcing bar 1, and the reaction force receiver a is connected to the threaded reinforcing bar. 1 so that it cannot rotate.

Therefore, as shown in FIGS. 4 to 6, the set spanner 13 of the tightening machine b is engaged with the coupler nut 3, and the arc gear 15 of the rotary spanner 14 is engaged with the reaction force receiver a, and the tightening machine Drive b and its rack 1
When a downward driving force is applied to the tightening machine b, the arc gear 15 of the rotary spanner 14 is fixedly supported by the threaded reinforcing bar 1 via the reaction force receiver a, so that the main body 12 is screwed. 1 side around reinforcing bar 1,
That is, the coupler nut 3 is loosened by unscrewing the coupler nut 3 using a set spanner 13 which rotates in the direction of the arrow in FIGS. 5 and 6 and rotates integrally with the main body 12.

On the other hand, after the above-mentioned work is completed, in the opposite manner to the above, the locking spanner 13 of the tightening machine b and the arcuate gear 15 of the rotary spanner 14 are connected to the coupler nut 3 and the reaction force receiver a.
When the bolts 7 and 9 are screwed out, the half pieces 5 and 5' of the reaction force receiver a separate, and the reaction force receiver a is attached to the threaded reinforcing bar 1.
can be removed from

In addition, as shown in Figure 7, concrete wall A
When tightening the coupler nut 3, which is located close to Rotary spanner 14
After each of the arcuate gears 15 of The arcuate gear 15 of the rotary spanner 14 is fixedly supported by the threaded reinforcing bar 1 via the reaction force receiver a, and the main body 12 is driven to rotate in the opposite direction to the other side around the threaded reinforcing bar 1. Screw in coupler nut 3 and tighten coupler nut 3 to coupler 2.

The split metal type reaction force receiver a has half-cut pieces 5, 5' instead of the above-mentioned half-cut pieces 5, 5' which are removably attached using bolts 7, 9 and joint pieces 8.
5' may be configured to be openable and closable by screwing one side and fixing the other side with a bolt.

In addition, instead of the threaded reinforcing bar 1 described above, the reaction force receiver a can also be used in the same way as described above for a flat threaded reinforcing bar, such as a threaded reinforcing bar that has an elliptical cross section and has screws installed on its longer diameter side. can.

In the present invention, the reaction force receiver of the coupler nut tightening machine for threaded reinforcing bars is configured as described above, and by opening and closing in a split metal manner, there is no need to insert the reaction force receiver into the threaded reinforcing bars from the end. , it can be non-rotatably fitted from the side to a desired location on the threaded reinforcing bar, and the reaction force receiver can be easily and quickly attached to and removed from the desired location on the threaded reinforcing bar. Therefore, when you want to loosen the coupler nut because the screw length between the threaded reinforcing bar and the coupler is insufficient, etc., attach a reaction force receiver to the required location of the threaded reinforcing bar,
By driving the tightening machine by engaging the set spanner of the tightening machine with the coupler nut and the arc gear of the rotary spanner with the reaction force receiver, the arc gear of the rotary spanner of the tightening machine becomes the reaction force receiver. The coupler nut is firmly fixed and supported on the threaded reinforcing bar through a tool, and the tightening machine mechanically loosens the coupler nut quickly, saving labor and time and making it easy to loosen the coupler nut.
Moreover, the coupler nut and threaded reinforcing bar will not be damaged.

Furthermore, by operating the tightening machine in the same manner as above and driving the tightening machine in the opposite direction, it is possible to mechanically tighten the coupler nut near the wall, making it easy to handle, improving work efficiency, and having an extremely simple structure. It is simple and can be manufactured at low cost, and has the effect of being firmly fixed.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a reaction force receiver of a coupler nut tightening machine for screw reinforcing bars according to an embodiment of the present invention;
Figure 2 is a front view, Figure 3 is a plan view, Figure 4 is a plan view of the tightening machine loosening the coupler nut using the same reaction force receiver, and Figure 5 is the tightening machine. Figure 6 is a front cross-sectional view of the lock spanner engaging part, Figure 6 is a front cross-sectional view of the rotary spanner engaging part of the tightening machine, and Figure 7 is a tightening machine using the same reaction force receiver to tighten the coupler nut near the wall. FIG. 3 is a plan view of a tightening operation state. 1...Threaded reinforcing bar, 5,5'...Half-cut piece, 10...
...Oval hole.

Claims (1)

[Scope of utility model registration request] A coupler nut tightener for threaded reinforcing bars, in which two half-pieces are fixed in a split metal manner so that they can be opened and closed, and the outer circumferential surface thereof has a hexagonal shape, and an oval hole that fits into the threaded reinforcing bars is installed inside. Reaction force receiver for attaching machine.