JPS5891912A - Screw joint connection of steel 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 uses a threaded joint to connect steel bars such as threaded reinforcing bars (by tightening them using a specially shaped lock nut, without using a special filling device). C: A joint connection method in which a filling agent is press-fitted between the steel rod and the coupler (this is related to two methods).

As shown in Figure 1, the conventional method for connecting threaded joints is to press-fit two fillers between the male and female threads of the steel rod and the coupler.

A method of filling and hardening was adopted (Jikko 5).
2-7943). This method consists of a pair of steel rods A, A
Screw coupler B onto the end of the

Filler C is injected through a hole provided in the center of the coupler using a special filling device, and hydraulic or electric power is usually used as the power source for the filling device.

However, if a special power generating device such as a hydraulic pump is built in as the filling device, it is difficult to move and handle due to its large weight, and if the power source is externally supplied, such as electricity, it is difficult to move and handle it, and if a power source such as electricity is supplied externally, the When handled, it was extremely difficult to work with.

The present invention has been made in view of the above-mentioned problems, and provides a joint connection method that allows press-fitting and filling of a filler easily and manually.

Next, the present invention will be explained using figures.

FIG. 2 is a sectional view showing a 111 standard connection made according to the present invention, and shows a steel rod 1a having a male thread at its end.

1t) are combined using coupler 2 with a filler intake part at the end, and a lock oak with a special bag shape is made.
3a and 3b are used to tighten the screws, and filler 4 is filled between the male and female threads.

The end of the coupler 2 is provided with a drawing part 2-1 so that the filler 4 can be easily press-fitted therein, and an air vent hole 2-2 is provided in the center. 3(a) and 3(b) are external perspective views of lock nuts used in the present invention.
b has bag portions 3a-1 and 3b-1 at one end, respectively, and is configured such that the inner diameter of the bag portions 3a-1 and 3b-1 and the outer diameter of the coupler portion 2 fit together.

Next, the connection method of the present invention will be explained using FIGS. 4 and 5.

First, the steel rod configured as described above ↓a + lb, coupler 2
．． Arrange the lock nuts 3a and 3b as shown in FIG.

In this state, the bag portions 3a-1, 3b- of the lock nut
Filler 4 is applied to 1 or filled in advance. Since the bag portion of the lock nut is open, the application work can be easily done with just your bare hands.

Next, lock 3a and 3b as shown in Figure 5.
Tighten coupler 2 by hand. At this time, since the outer diameter of the coupler 2 fits into the lock nut bag portions 3a-1 and 3b-1,
The filler 4 is inserted into the steel rods la and lb from the inlet part 2-1 of the coupler.
This press-fitting force can be easily applied by tightening the lock nuts 3a and 3b with a simple tool such as a spanner. At this time, in order to prevent the filler 4 from leaking in other directions, it is also effective to seal the bottom of the bag with a gasket or the like.

As described above, the final locking process is completed) 3a.

3b, the filler 4 can be press-fitted between the male and female threads of the steel rods 1a, lb and the coupler 2, as shown in FIG. At this time, tighten the lock nuts 3a and 3b one by one, and visually observe whether the filler comes out from the hole 2-2 in the center of the coupler when tightening.

It can also be confirmed that the filler is steadily press-fitted between the steel rod and the coupler.

In this way, the threaded joint can be fixed by hardening the filler, but it is also possible to fix the threaded joint.
It is also possible to obtain the effects of the filling method and torque tightening method by manually or mechanically tightening to a certain torque. Furthermore, a half-split sleeve in which the steel rod is divided in the axial direction can also be used as the sleeve having an internal thread.

As described above, the present invention has the effect that the filler press-in operation, which conventionally required a special filling device, can be easily performed by one person. 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]

Fig. 1 is a cross-sectional view showing a conventionally used filler press-fit joint, Fig. 2 is a cross-sectional view of a joint according to the present invention, and Fig. 3 (a).
, (b) is a perspective view of the lock nut, Figures 4 and 5.
The figure is a cross-sectional view showing a joint connection procedure. la, lb...Threaded steel rod 2...Sleeve-shaped cup 3a, 3b...Lock nut 4.
...Filler agent Patent attorney Tatsuo Chanoki 1st article 2 rules

Claims (1)

[Claims] A threaded joint consisting of a pair of steel rods each having a male thread at the end, a sleeve-like coupler having a female thread on the inner surface that can be screwed into the male thread, and a lock nut. A method for connecting a steel bar with a threaded joint, characterized in that a filler is applied to the part of the coupler, and the filler is press-fitted between the male and female threads of a part of the coupler and hardened by tightening a lock nut.