JPS5924099Y2 - cord holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cord holder used for cord wiring connections in, for example, power distribution panels, operation panels, or various electrical devices of machine tools.

Conventionally, as shown in FIG. 1, this type of cord holder includes a mounting fixture 3 having a generally cylindrical overall shape and having a threaded portion 1 and a flange portion 2 made of a hard synthetic resin material, and this mounting fixture. A hollow cylindrical body 4 formed of a soft synthetic resin material is connected to the end on the flange portion 2 side of 3 and the inner diameter becomes smaller toward the tip.The hollow cylindrical body 4 is attached to the fixed body 3. The mounting and fixing body 3 and the hollow cylinder body 4 are integrally connected by a flange 5 that extends to the open end side of the mounting and fixing body 3 through the inner circumferential surface of the flange 5 and is formed at the tip thereof.

The cord holder mounting fixing body 3 is fixed to the cord wiring connection part of various devices, and the hollow cylindrical body 4 is cut according to the inner diameter of the cord according to the purpose. It is designed to protect the connecting part of the cord and prevent disconnection and poor contact.

However, in such a structure, when the pre-formed mounting fixture 3 is fitted into a mold to form the offshore cylinder 4, the mounting fixture 3 and the mold are used to form the flange 5 of the hollow cylinder 4. A gap must be provided between the mounting fixture 3 and
The problem was that the fitting work was troublesome and took too much time.

In addition, a large amount of material is required to form the flange 5 on the hollow cylindrical body 4 through the inner circumferential surface of the mounting fixture 3, and furthermore, the connection between the mounting fixture 3 and the hollow cylindrical body 4 is difficult. Since this is done by the flange 5, the connection state is weak, and if an impact is applied to the cord and the cord is strongly pulled, the hollow cylinder 4 may come off from the mounting fixed body 3.

Therefore, in order to ensure that the mounting fixture 3 and the hollow cylindrical body 4 are combined, a plurality of holes 6 are formed in the side surface of the flange portion 2 of the mounting fixture 3, as shown in FIG. When molding the cord holder 4, the annular part 7 and the hollow cylinder 4 are integrally formed on the threaded part 1 side of the flange part 2 through the hole 6, thereby connecting the mounting fixing body 3 and the hollow cylinder. is possible.

However, in a cord holder with this structure,
During molding, the material for the annular part 7 flowed into the threads of the threaded part 1 and hardened, resulting in the inconvenience of requiring stripping work.

Therefore, a molding method may be considered in which a cylindrical auxiliary member is screwed onto the threaded portion of the mounting/fixing body 3, and the mounting/fixing body 3 is fitted into a mold together with this auxiliary member to protect the threaded portion 1. In order to do this, an auxiliary member must be screwed into the threaded portion 1, and the work of fitting the mounting and fixing body 3 into the mold becomes troublesome, resulting in poor work efficiency.

Therefore, in addition to the normal molding molds A and B, it may be possible to prepare a separate mold C for forming the annular part, as shown in Fig. 2, to prevent the flow from flowing into the threaded part. In this case, molding of molds A, B, and C is troublesome, the direction of mold removal is also complicated, a special molding machine needs to be prepared, and there are many joints in the mold, so There are problems such as the possibility of rashes.

Therefore, in view of these points, the present invention integrally forms the mounting and fixing body and the hollow cylindrical body from the same member, and by fitting and arranging the hollow cylindrical body on the inner surface of this mounting and fixing body, the above-mentioned It is an object of the present invention to provide a cord holder that can reliably connect a mounting fixing body and a hollow cylindrical body and that can be easily manufactured.

The present invention will be explained in detail below using the drawings.

FIG. 3 is a sectional view of essential parts showing an example of the cord holder according to the present invention.

In the same figure, this cord holder 10 includes a mounting fixing body 13 which is formed in a generally cylindrical shape as a whole and has a threaded part 11 and a hexagonal flange part 12 formed on the outer periphery of both ends thereof.
A hollow cylindrical body 14 which is connected to the end of the flange 12 side of the mounting and fixing body 13 and whose inner diameter decreases toward the tip is made of an elastic insulating material such as rubber, polyethylene, or soft vinyl chloride. It is molded from a soft synthetic resin material such as, and is integrally bonded.

Further, a hollow cylindrical body 15 made of a hard synthetic resin material such as polycarbonate is fitted into the inner circumferential surfaces of the mounting and fixing body 13 and the flange portion 12 from the direction of the arrow, and is placed in close contact therewith.

In this case, the hollow cylindrical body 15 has an inner diameter equivalent to that of the conventional mounting/fixing member 3 shown in FIG. 2, and also has an equivalent length in the axial direction.

In addition, the interface between the mounting and fixing body 13 and the hollow cylindrical body 15, that is, the inner circumferential surface of the mounting and fixing body 13 and the outer circumferential surface of the hollow cylinder 15, has a circumference as shown in the enlarged cross-sectional view of FIG. A large number of grooves having concave and convex grooves are formed alternately in the direction, and the concave and convex portions of both the grooves are fitted into each other and are in close contact with each other.

According to such a configuration, the mounting fixing body 13 and the hollow cylinder body 1
4 are integrally molded from the same material, and the hollow cylindrical body 15 that is inserted between the mounting and fixing body 13 and the flange portion 12 is fitted into the inner peripheral surfaces of the mounting and fixing body 13 and the flange portion 12, so that the mounting and fixing body 13 and The state of connection with the hollow cylindrical body 14 is strong, and even if an impact is applied to the cord and the cord is strongly pulled, there is no possibility that the hollow cylindrical body 14 will come off from the mounting fixing body 13.

Further, since the mounting and fixing body 13 and the hollow cylinder body 14 are formed of the same soft synthetic resin material, the manufacturing method is extremely simple, and a complicated molding device is not required.

Furthermore, since the flange portion 12 of the mounting fixing body 13 is made of a soft synthetic resin material, it has elasticity and acts as a buffer member when the cord holder is fixed to the cord wiring connection portion of the device. It can be securely tightened to the cord connection part, and the adhesion is also good.

Furthermore, there is no need to use washers or the like when attaching the cord holder.

In addition, in the above embodiment, the mounting fixing body 13. Although a case has been described in which a large number of grooves having concave and convex grooves are provided alternately in the circumferential direction on the interface between the inner circumferential surface of the flange portion 12 and the outer circumferential surface of the hollow cylindrical body 15, the present invention is not limited to this. The same effect as described above can be obtained even if the boundary surfaces are provided with convex and concave surfaces having wart-like cross sections and the hollow cylindrical bodies 15 are fitted together.
The fitting structure provided at the interface between the two is not particularly limited.

Further, this hollow cylindrical body 15 is attached to the mounting fixed body 13. Similar effects can be obtained even if the hollow cylindrical body 14 is attached to a mold during molding, and the hollow cylindrical body 15 is fitted onto the inner wall surface when molding is completed.

As explained above, according to the present invention, the mounting fixing body and the hollow cylindrical body are integrally formed of the same soft synthetic resin material, and the inner wall surface of the mounting fixing body is made of hard synthetic resin having an uneven surface on the outer periphery. By closely arranging the hollow cylindrical body made of the material, the mounting fixing body and the hollow cylindrical body can be easily, reliably, and firmly connected via the hollow cylindrical body.

In addition, since the mounting fixture and the hollow cylindrical body can be made of the same soft synthetic resin material, the construction of the mold is simple, and the work of fitting the hollow cylinder into the mounting fixture is easy.
The manufacturing work of the cord holder is simplified, work efficiency is greatly improved, and manufacturing costs are also reduced, which are extremely excellent effects.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams for explaining the conventional cord holder, Figure 3 is an explanatory diagram for explaining an example of the cord holder according to the present invention, and Figure 4 is an enlarged view of the main part of Figure 3. FIG. 10... Cord holder, 11... Screw part, 12... Flange part, 13...
Mounting fixing body, 14...Hollow cylindrical body, 15...
...Hollow cylindrical body.

Claims (1)

[Scope of utility model registration request] A mounting fixing body formed in a generally cylindrical shape as a whole and having a threaded part and a flange part formed on the outer periphery, and a hollow space connected to the flange side of the mounting fixation body and having an inner diameter smaller toward the tip. a cylindrical body, the mounting and fixing body and the hollow cylinder are integrally formed of the same soft synthetic resin material, and the inner wall surface of the mounting and fixation body is made of a hard synthetic resin material having an uneven surface on the outer periphery. A cord holder characterized by closely arranged hollow cylindrical bodies.