JPS5894546A - Connection of reinforcing iron rod - 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 enables the connection of steel bars such as threaded reinforcing bars using a threaded joint using a specially shaped coupler, thereby making it easy to connect steel bars such as threaded reinforcing bars without using a special filling device. The present invention relates to a joint connection method in which a filler is press-fitted between a steel rod and a coupler.

As shown in Fig. 1, the conventional method for connecting a screw body is to press filler (grout) between the steel rod and the male and female threads of the coupler and harden it (Utility Model Publication No. 52-7943 Publication No.). This method uses a pair of steel rods AXA
A coupler B is screwed onto the end of the coupler B in advance, and the filler is injected from a hole C provided in the center of the coupler using a special filling device.The power source for the filling device is usually hydraulic pressure or Electric power is used.

However, if the filling device incorporates a special power generating device such as a hydraulic pump, it will be difficult to move and handle due to its large weight, and if the power source is externally supplied, such as electricity, it will be difficult to handle the power source, etc. However, it was complicated and had extremely poor workability under scaffolding conditions with complicated obstacles from high places, such as those found in ordinary places where reinforced steel buildings are assembled. Furthermore, due to the number of filling devices, the number of people who can work at the same time is limited, and productivity is inevitably low.

The present invention has been made in view of the above-mentioned problems, and provides a joint connection method that enables easy manual press-filling of a filler.

Next, the present invention will be explained using figures.

FIG. 2 is a sectional view showing the connection state of steel rods fastened according to the present invention, in which steel rods Ia and ib having male threads at their ends are connected using a coupler 2 having a bag portion 2' at one end. The nut 3 having a push-in part 6' that fits into the bag part is tightened, and a filler 4 is filled between the male and female threads.

? Figure 4.3 is an external perspective view of the nut 6.
has a push-in part 6' at -1, and is shaped so that the outer diameter of the push-in part 6' and the inner diameter of the coupler bag part 2' fit together.

Next, the connection method of the present invention will be explained in more detail with reference to FIG. 4G.

First, the coupler 2 having the bag portion 2' and the nut 3 as described above are arranged on the steel rods 1a and 1b having threaded ends as shown in FIG.

In this state, the filler 4 is applied inside the bag portion 2' of the coupler 2. Since the bag portion is open, the application work can be easily performed manually.

Next, tighten nut 6 onto coupler 2. At this time, since the outer diameter of the pushing part 6' of the nut fits into the bag part 2' of the coupler, the filler 4 is press-fitted between the steel rods 1a, lb and the male and female threads of the coupler 2, but this pressing force is This can be easily applied by tightening the nut 6 with a simple tool such as a spanner.

Finally, tighten the nut 6 as described above, and as shown in Figure 2, between the steel rods ia and 1b and the male and female threads of the coupler 2,
The filler 4 can be press-fitted.

FIG. 5 shows another embodiment of the present invention, in which a steel rod 1a1
1b is coupled using a coupler 2 having bag portions 2 a f and 2 b+ at both ends, and tightened using nuts 3 a and 3 b having push-in portions 6 a I and 6 b I that fit into the bag portions, and tightening between the male and female threads. is filled with filler 4.

As for the connection method, as in the previous example, the filler 4 is applied to the bag parts 2a' and 2b' in advance, and then the nuts 3a and 3b are tightened, and the filler 4 is press-fitted between the steel rods ia and ib and the male and female threads of the coupler 2. let

This embodiment has the advantage that the oaks 5a, 31) can be manually or mechanically tightened to a certain torque to obtain the effects of both the filling method and the torque tightening method.

Further, in order to prevent the filler 4 from leaking in directions other than the intended direction, it is also considered to seal the outer end portion of the nut with a packing or the like.

As described above, the present invention has the effect that the filling side pressure work, which conventionally used a special filling device, can be easily performed manually. This is particularly effective when assembling reinforced steel buildings, which often requires connection work on unstable scaffolding at high places.

[Brief explanation of the drawing]

Figure 1 shows the conventionally used filler press-in! 2 is a sectional view of a joint according to the present invention, FIG. 3 is a perspective view showing the shape of a nut used in the present invention, and FIG. 4 is a sectional view showing a joint connection method according to the present invention. FIG. 5 is a sectional view showing another embodiment of the present invention. 1 a-, 1b; Threaded steel rod 2; Sleeve-like coupler 2': Bag part 3: Nut 6'; Pushing part 4: Filler rod/times C Broom 3 figure, 4 times 5 times

Claims (1)

[Claims] 1. A screw formed by a pair of steel rods having male threads at their ends, and a sleeve-like coupler having a female thread on the inner surface that can be engaged with the male threads. In addition to using a coupler made of the same material, and using a nut having a push-in part formed to fit into the bag shape, the filler applied to the bag part is press-fitted between the male and female threads of a part of the coupler by tightening the nut, A method for connecting reinforcing bars characterized by filling and hardening. 2. In a threaded joint consisting of a pair of steel rods having male threads at the ends and a sleeve-like coupler having a female thread on the inner surface that can be screwed into the male thread, a coupler with bag-shaped ends is used, and the bag-shaped coupler is used. Claim 1, in which a filler applied to the bag part is press-fitted from both ends between the male and female threads of a part of the coupler by tightening the nut, using a nut having a push-in part formed so that it can be fitted. How to connect reinforcing bars.