JPH0112634B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nipple attachment device suitable for use in plumbing work for water, gas, etc.

Conventionally, nipples have been widely used in piping work for supplying and discharging water, gas, etc. For example, nipples are used for the main bodies and pipes of electric water heaters and gas water heaters,
So-called nipples, which have threaded parts at both ends of the pipe, are often used to connect water faucets and pipes, etc., but in order to attach the nipple to one connecting object, first manually attach the nipple to the threaded part of the connecting object. The tip of one thread is screwed in, and then the center part of the nipple is gripped with a pipe wrench to tighten the thread. However, installation takes a lot of time, and especially when assembling products on a conveyor line, other processes are required. The impact on
In addition, the larger the diameter of the nipple, the more physical strength is required, which limits the number of workers.Furthermore, with pipe wrenches, the tightening process differs depending on the worker, resulting in unstable quality, and furthermore, it is difficult to work in narrow spaces. The drawback was that it was difficult to use.

The present invention has been made to provide a nipple mounting device that can eliminate the drawbacks in the nipple mounting work as described above, and its gist is to provide a nipple mounting device that can be used for power tools having a rotating shaft that can be rotated in forward and reverse directions. One end of a nipple socket is attached to the rotating shaft, and the other end of the socket is provided with a threaded portion that can be screwed into the threaded portion of the nipple, and an appropriate notch is provided in the threaded portion of the socket. , the nipple attachment device is characterized in that a stopper is provided at the back of the threaded portion.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

Figures 1 to 4 show an example of installing a nipple with male screws on both ends to an electric water heater, and 1 shows a nipple that can be rotated in the forward or reverse direction by operating a switch (not shown). This electric tool has a rotary shaft 2 that can be rotated, and the switch can be operated while holding the handle 3 with one hand. 4 is a nipple socket, and as shown in FIG. 4, the inside of one end of the short cylindrical body is formed into a rectangular shape with a smaller diameter than the central round hole, and serves as the insertion hole 5 for the tip of the rotating shaft 2, and the inside of the other end is It is formed into a round shape with a larger diameter from the center, and serves as a nipple screw hole 6, which will be described later. The tip of the rotating shaft 2 is formed in the shape of a square prism, and the fitting hole 5 of the socket 4 has a pin hole 7 penetrating the fitting hole 5 and a corresponding pin hole 7 penetrating the tip of the rotating shaft 2. Align the provided pin insertion hole 8 with the provided pin insertion hole 8, insert the pin 9, and insert the rubber ring 10 into the fitting groove 11 of the rubber ring 10 previously drilled on the outer peripheral surface of one end of the socket 4.
The socket 4 is attached to the rotating shaft 2 by fitting it into the socket 4.
One end is detachably attached. Also, one threaded portion 13 of the nipple 12 is attached to the other end of the socket 4.
A screw portion 15 that can be screwed into the screw portion 1 is provided.
5, a plurality of vertical notches 16 are provided at equal intervals in the helical direction of the screw, as shown in FIG. 4, and the screw threads have almost disappeared in the notches 16. A dowel 17 formed by a difference in hole diameter is provided at the back of the threaded portion 15, and when the threaded portion 13 of the nipple 12 is screwed in, the tip of the threaded portion 13 is inserted into the threaded portion as shown in FIG. 15 and screwed in beyond a predetermined depth. Note that 18 is a guide hole.

The operation of attaching a nipple to an electric water heater using the nipple attachment device described above will be explained with reference to FIG. Slightly screw it in, then use the guide hole 18 of the socket 4 to tighten the threaded part 15 of the socket 4.
When the threaded part 13 of the nipple 12 is applied to the shaft and the rotating shaft 2 of the power tool 1 is rotated in the forward direction, the threaded part 14 of the nipple is completely screwed into the nipple mounting threaded hole 20 and tightened, and the threaded part 13 of the nipple is tightened completely. The threaded portion 15 of the socket 4 is incompletely threaded. If the rotating shaft 2 is then rotated in the opposite direction, the nipple 12 and the socket 4 will be unscrewed due to the incomplete threading, and the socket 4 will be separated from the nipple 12, but the nipple 12 will still be threaded into the electric water heater 19. It becomes a desolation.

In the above embodiment, the nipple is a male screw;
Correspondingly, the socket has a female thread in the example shown, but the embodiment shown in FIG. 5 has a nipple 12' on the contrary.
has female threads 13' and 14', and socket 4' has a male thread 15'.The threaded part 14' of the nipple 12' is connected to the threaded part 20' screwed on the tip of the straight pipe 19'. When screwed together, the threaded portion 15' provided in the socket 4' becomes a male thread, and similarly a notch 16' is formed.

In the present invention, the notch provided in the threaded portion of the socket may have not only almost no threaded thread, but also one that has no threaded thread completely or one that is slightly lower.
Moreover, the direction of the notch is not limited to the vertical direction as in the above embodiment, but may also be provided in an oblique direction, and in any case, the shape and position of the notch does not matter as long as it reduces the frictional resistance of the screw.

Furthermore, in each of the above embodiments, the threaded portion of the nipple gradually becomes larger or smaller in diameter from the tip to the rear end of the threaded connection, and the threaded portion of the socket, on the contrary, gradually becomes smaller or larger in diameter. , these may have mutually constant diameters.

In the nipple attachment device of the present invention, a socket is attached to a rotating shaft that can be rotated forward and backward by power, and the threaded portion of the socket that can be screwed into the threaded portion of the nipple is provided with an appropriate notch. Since a stop is provided at the back of the threaded part, the threaded engagement between the socket and the nipple is incomplete, and in combination with the forward and reverse rotation function of the rotating shaft, the nipple is firmly tightened to the desired object. Immediately after that, the socket can be freely removed from the nipple, shortening the installation time and improving work efficiency.In particular, even with large diameter nipples, screwing and tightening can be done easily, and since the torque is set at a constant level, tightening is possible. There is no variation in the degree of use among workers, and it can also be used in narrow spaces, expanding the range of use.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the present invention and how it is used; Fig. 2 is an enlarged right half cutaway sectional view showing the main parts of the same; Fig. 3 is a top view showing only the socket of the above. , FIG. 4 is a right-half cutaway front sectional view of the same as above, and FIG. 5 is a front view showing another embodiment and its usage mode. 1 is a power tool, 2 is a rotating shaft, 4 and 4' are sockets, 6 is a threaded hole for a nipple, 12 and 12' are nipples, 13 and 13' are threaded parts of one of the nipples,
14 and 14' are the other threaded portions of the nipple, 15 and 15' are the threaded portions of the nipple, 16 and 16' are notches, and 17 and 17' are retainers.

Claims (1)

[Claims] 1. One end of a nipple socket is attached to the rotating shaft of a power tool that has a rotating shaft that can be rotated in forward and reverse directions, and the other end of the socket is provided with a threaded part that can be screwed into the threaded part of the nipple. A nipple mounting device characterized in that a suitable notch is provided in the threaded portion of the socket, and a stopper is provided at the back of the threaded portion.