JPH0231859Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to a waterproof connector used to connect second class metal flexible conduit used to protect electric wires and cables. .

``Conventional technology'' Traditionally, class 2 metal flexible conduit tubes (hereinafter referred to as tubes) have been used to connect piping to distribution boards, and from piping to motor terminal boxes, etc., and have excellent weather resistance and airtightness, making it possible to connect electric wires. There are waterproof connectors that provide complete protection, such as the AP. Connector (registered trademark).

To do this, cut the tube to a predetermined length with a hacksaw or knife, pass the fukuronut, reinforcing ring, and packing through the tube, insert the cap inside the end of the tube, and cover the outside surface with the cap. After setting the tube end, insert it into the nipple body and tighten the fukuro nut.

``Problem that the invention is trying to solve'' Conventionally, when setting a waterproof connector, the cap is inserted into the end of the tube by hand, but when cutting the tube, it becomes slanted or the cut surface curls up. , it can be hard to insert.

Also, since the material of the cap is soft, the brim surface is deformed, and the cap is round and slippery, so the tube may not fit all the way into the cap. (Figure 8) Also, after turning and inserting the tube, it is not possible to check whether the tube is completely inserted to the back of the cap.

Therefore, as time passes after installation and use, the tube may come off from the connector due to heat or unexpected shock, allowing dust, fine raw materials, water, etc. to enter the tube.

Factory machinery and equipment cannot be repaired when they are in constant use, so they are reworked when operation is stopped, but this is twice the effort and wastes time and effort.

Today, as factory equipment is required to be more precise, labor-saving, and more efficient, it is essential that the electrical wires that drive it must be completely protected.

This invention solves these problems and aims to completely set the end of the tube all the way to the back of the cap.

``Means for solving the problem'' (a) A protrusion 3 is provided on the cap receiving surface 2 of the nipple body 1.

(b) Drill a hole 6 in the end face 5 of the cap 4 into which the protrusion 3 will fit.

The present invention is a waterproof connector suitable for securely inserting a cap having the above structure into a tube.

``Operation'' As shown in Figures 4 and 5, cut the tube 7 to a predetermined length with a hacksaw or knife, insert the fukuronut 8, reinforcing ring 9, and packing 10 into the tube 7, and then Insert the cap 4 into the inside of the end opening by rotating it by hand. Once it has been inserted to a certain extent and becomes hard, insert the nipple main body 1 into the cap 4, align the protrusion 3 with the hole 6 of the cap 4, and turn it while pressing. When the cap 4 no longer turns, remove the nipple body 1 and check through the hole 6 that the end of the tube 7 has entered the cap 4 all the way.

After checking, insert the cap 4 into the nipple body 1, align the protrusion 3 with the hole 6, slide the packing 10 and reinforcing ring 9, and tighten the fukuro nut 8.

The rotational torque applied to the nipple body 1 is transmitted through the projection 3 of the nipple body 1 to the hole 6 of the cap 4.
The cap 4 is turned and screwed into the tube 7.

``Example'' The explanation will be given below based on FIGS. 1 to 3. (a) On the cap receiving surface 2 of the nipple body 1, a length ranging from about twice the thickness of the cap 4,
Two to three protrusions 3 are integrally molded.

(b) An oblong hole 6 into which the protrusion 3 is inserted is provided on the end face 5 of the cap 4.

The above is one embodiment of the present invention.

Further, as another embodiment of the present invention, as shown in FIG. 7, a protrusion 3' is provided on the end surface 5 of the cap 4,
A protrusion insertion groove 11 can be provided on the cap receiving surface 2 of the nipple body 1.

``Effect of the invention'' With this invention, when turning the cap into the tube, align the protrusion of the nipple body with the hole and insert it, grasp the nipple body and turn it, so you can put your hand on the hexagonal part of the nipple body. Since the cap can be turned with a large amount of torque without slipping, the end of the tube can be inserted all the way into the cap, allowing for complete installation. (Figure 6) Also, the hole in the cap allows you to check whether the tube has gone all the way into the cap.

As a result, the tube will never come off from the connector after it is installed and used, and there will be no need to repeat the process, so reliable work can be done.

Since no dust, dust, water, fine raw materials, etc. can enter, electric wires and cables can be completely protected.

[Brief explanation of the drawing]

FIG. 1 is a half-sectional view of the present invention. FIG. 2 is a half-sectional perspective view of the nipple body 1 of the present invention. FIG. 3 is a half-sectional perspective view of the cap 4 of the present invention. FIG. 4 is an exploded perspective view of the present invention. FIG. 5 is a perspective view showing the state of use of the present invention. FIG. 6 is a half sectional view showing a state in which the tube 7 and the waterproof connector are connected according to the present invention. FIG. 7 is a perspective view showing another embodiment of the present invention. FIG. 8 is a half-sectional view showing an example of a conventional case in which the cap 4 is improperly attached to the tube 7. 1 is the nipple body, 2 is the cap receiving surface, 3,
3' is a protrusion, 4 is a cap, 5 is an end face, 6 is a hole,
7 is a tube, 8 is a fukuro nut, 9 is a reinforcing ring, 10 is a packing, and 11 is a protrusion insertion groove.

Claims (1)

[Scope of utility model registration request] A waterproof connector characterized in that a projection 3 is provided on a cap receiving surface 2 of a nipple body 1, and a hole 6 into which the projection 3 can be inserted is provided in an end surface 5 of a cap 4.