JPS60751B2 - cord holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cord holder used for a trailing portion of cord wiring in, for example, a power distribution board of a machine tool, an operation panel, or various electrical devices.

Conventionally, this type of cord holder consists of a mounting fixture 3 having a generally cylindrical overall shape and having a threaded portion 1 and a flange portion 2, as shown in FIG.
It consists of a hollow cylindrical body 4 formed of a European synthetic resin material, which is bent at the side end and whose inner diameter decreases toward the tip, and the hollow cylindrical body 4 is attached to the inner peripheral surface of the fixed body 3. A structure is known in which the mounting fixture 3 and the hollow cylindrical body 4 are integrally connected by a flange 5 that extends to the closed end side of the mounting fixture 3 through the flange 5 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 forming the hollow cylindrical body 4 by iron-inserting the pre-formed mounting fixture 3 into a mold, the mounting fixture 3 and the mold are used to form the flange 5 of the hollow cylinder 4. It is necessary to provide a gap between the two and the fixing body 3 has the drawback that the work of iron fitting the mounting fixing body 3 is troublesome and takes 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 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 fixed body 3. Therefore, in order to ensure that the mounting fixed body 3 and the hollow cylinder body 4 are combined, a second
As shown in the figure, a plurality of holes 6 are formed on the side surface of the flange portion 2 of the mounting and fixing body 3, and when forming the hollow cylindrical body 4, the holes 6 are
Accordingly, the annular portion 7 is formed integrally with the hollow cylinder 4 on the side of the threaded portion 1 of the flange portion 2, and a cord holder having a structure in which the mounting fixing body 3 and the hollow cylinder are combined can be considered.

However, in a cord holder with this structure,
During molding, the material for forming the annular portion 7 flows into the threads of the threaded portion 1 and hardens, resulting in the inconvenience of requiring deburring work.

Therefore, a molding method can be considered in which a cylindrical auxiliary member is fitted to the threaded portion of the mounting and fixing body 3, and the mounting and fixing body 3 is inserted into the mold together with this auxiliary member to protect the threaded portion 1. In this case, the auxiliary member must be fitted to the threaded part 1, and the work of iron-fitting the mounting fixing body 3 into the mold becomes troublesome, resulting in poor work efficiency.For this reason, the ordinary molding mold A, In addition to B, it is also possible to prepare a separate mold C for forming the annular part to prevent the flow into the threaded part, as shown in Fig. 2, but in this case, molds A and B , C is troublesome to mold, the direction of mold removal is complicated, a special molding machine needs to be prepared, and there are problems such as burrs easily occurring because the mold has many joints. .

In view of these points, the present invention provides an annular protrusion larger than the outer diameter of the threaded part between the threaded part and the flange part of the mounting fixing body, and this annular protrusion allows the hollow cylindrical body to have an annular shape. The present invention is to provide a cord holder whose parts can be easily formed and which can be manufactured easily.The present invention will be explained in detail below using embodiments shown in the drawings.

FIG. 3 shows an embodiment of the cord holder according to the present invention, and in the same figure, the cord holder 106 is formed generally in a generally cylindrical shape from metal or a hard synthetic resin material such as polycarbonate, and both ends thereof are made of metal or a hard synthetic resin material such as polycarbonate. A mounting fixture 13 having a threaded portion 11 and a hexagonal flange 12 formed on the outer periphery, and a flange portion i of this mounting fixture;
A hollow cylindrical body 14 is formed of an elastic insulating material such as rubber or a soft synthetic resin material such as polyethylene or soft vinyl chloride, and the inner diameter decreases toward the tip. It is configured.

And, these mounting fixing body 13 and hollow cylindrical body 14 are "
They are integrally connected by an annular portion 16 of a hollow cylindrical body 14 formed on the threaded portion 11 side of the flange portion 12 through a plurality of small holes 15 drilled in the side surface of the flange portion 12 of the mounting fixing body 13. There is. In this case, the hollow cylindrical body 14 has a first cylindrical part 17 having the same inner diameter as the inner diameter of the fixing member 13, a second cylindrical part i8 and a third cylindrical part 19 each having a smaller inner diameter. These are divided by an annular groove 201. By cutting a predetermined portion of the hollow cylinder body 14 according to the outer diameter of the cord to be used with the cord holder 10, various kinds of cords can be made with one cord holder. It is configured so that it can be used for thickness code.
According to the present invention, as shown in FIG. A wisteria-like protrusion 21 having a large outer diameter is integrally provided.

This annular protrusion 21 is a characteristic feature of the present invention, and is used to prevent fluid synthetic resin material from flowing into the thread of the threaded portion 11 when the hollow cylinder 14 is molded. be. In this case, in this embodiment, the outer diameter of the annular protrusion 21 is smaller than the outer diameter of the annular part 16, and the side surfaces of the threaded part 11 of the annular protrusion 21 and the threaded part 11 of the annular part 16 are
The side surfaces are located on the same plane. In addition, the mold for forming the cord holder 10 is, as shown in FIG.
An annular recess 22 into which the threaded part 11 of the mounting fixing body 13 is fitted with iron, an annular recess 23 for forming the annular part 16, and an annular recess 24 for holding the flange 12 are arranged on the same axis in a stepped shape. A mold part 25 for forming a cord insertion hole protruding from the center thereof is inserted into the movable mold B forming the hollow cylinder 14.

Then, the annular protrusion 21 of the fixed body 13 is pressed against the bottom of the annular recess 23 to seal the recess 22 into which the threaded part 11 is inserted, and the injection port 26 of the movable mold B is inserted into the hollow cylinder. Body 14 molding material is injected. The cord holder 10 configured as described above is manufactured as follows.

First, the mounting/fixing body 13 is integrally formed of a hard synthetic resin material or the like, and the mounting/fixing body 13 is fitted into the mold A with iron. In this case, the bag portion 25 of the mold A is iron-fitted into the corded hole of the mounting fixture 13, and the threaded portion 11 is inserted into the recessed portion 22.
The flange portion is pushed into the recess 24, and the side surface of the annular protrusion 21 on the threaded portion 11 side is pressed against the bottom of the recess 23. Thereafter, mold B is joined to mold A, and a synthetic resin material for molding the hollow cylindrical body 14 is injected from the injection port 26 of the mold B to mold the hollow cylindrical body 14. In this case, the flange 12 is inserted through the small hole 15 of the flange 12
An annular portion 16 is formed in the space formed by the recess 23 and the annular protrusion 21 on the side surface on the threaded portion 11 side, whereby the mounting fixing body 13 and the hollow cylindrical body 14 are integrally connected. The cord holder 10 is completed by removing it from the mold. In the cord holder 10 manufactured in this manner, an annular protrusion 21 larger than the outer diameter of the threaded portion 11 is provided protrudingly between the threaded portion 11 and the flange portion 12 on the outer periphery of the mounting fixture 13. When molding the hollow cylindrical body 14, the annular protrusion 21 prevents the material for molding the hollow cylindrical body 14 from flowing into the threads of the threaded portion 11, so that the mounting fixing body 13 and the hollow cylindrical body 14 are integrally formed. The annular portion 16 that is coupled to can be easily formed. Fifth
The figure shows another embodiment of the cord holder according to the present invention. In this cord holder 27, the annular portion 16 of the hollow cylindrical body 14 extends around the annular protrusion 21 of the mounting fixing body 13. It has an elastic protrusion 28 that protrudes over the entire circumference toward the threaded portion 11 side.

This elastic protrusion 28 is made of a soft synthetic resin material and has elasticity, and when the cord holder is fixed to the cord wiring connection part of the device, it becomes a buffer member.
The cord holder can be reliably attached and fixed to the cord wiring connection part, and the adhesion is also good. Therefore, according to this embodiment, since the side surface of the hard annular protrusion 21 is located on the same plane as the side surface of the annular portion 16 as in the previous embodiment, when the cord holder is attached, the washer etc. There is no need to use . In this case, the elastic protrusion 28 of the annular part 16 can be easily formed by deforming the annular part forming recess 23 of the fixing mold A in the above embodiment, and its shape can be changed as appropriate. can. In addition, 29 is a tongue piece, and this tongue piece 29 is formed so that each cylinder part 18, 19, 201 of the hollow cylinder body 14 may be opposed, respectively.

The through holes 30 formed in each pair of tongue pieces 29
The cord inserted into the cord holder is held by inserting a bolt into the cord holder and securing it with a nut to prevent the cord from moving in the direction of the vehicle. As explained above, according to the present invention, an annular protrusion larger than the outer diameter of the threaded part is provided on the outer periphery of the mounting fixing body between the threaded part and the flange. The annular portion connecting the body and the hollow cylindrical body can be easily formed.

Therefore, the structure of the mold for molding the hollow cylinder becomes simple, and the process of assembling the fixing body into the mold becomes easy, which simplifies the manufacturing process of the cord holder and greatly improves work efficiency. However, there are also effects such as being able to reduce manufacturing costs.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams for explaining a conventional cord holder, FIG. 3 is a partially cutaway sectional view showing an embodiment of the cord holder according to the present invention, and FIG. An explanatory diagram to explain the manufacturing method of the cord holder,
FIG. 5 is a partially cutaway sectional view showing another embodiment of the cord holder according to the present invention. 10...Cord holder, 11...Threaded part "12...
...Flange part, 13...Mounting fixing body, 14...
...Hollow cylindrical body, 15...Small hole, 16...
Annular portion, 21... Annular protrusion, 28...
Elastic protrusion. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. A mounting and fixing body formed generally in a generally cylindrical shape and having a threaded portion and a flange on its outer periphery; a hollow cylindrical body formed to have a small inner diameter, and integrally formed with the central cylindrical body through a plurality of small holes bored in the flange on both sides of the threaded part of the flange. A cord holder is provided with an annular portion, and the annular portion integrally connects the mounting fixing body and the hollow cylindrical body. A cord holder characterized in that a ring-shaped protrusion is provided in a protruding manner and has an outer diameter larger than the outer diameter of the threaded portion. 2. A mounting fixing body formed in a generally cylindrical shape as a whole and having a threaded part and a flange part formed on its outer periphery, and a mounting fixture connected to the flange side of the mounting fixing body and having an inner diameter decreasing toward the tip. a hollow cylindrical body formed of an elastic insulating material, and formed integrally with the hollow cylindrical body through a plurality of small holes drilled in the flange on side surfaces of the threaded portion of the flange. A cord holder is provided with an annular portion, and the annular portion integrally connects a mounting fixing body and a hollow cylindrical body. An annular protrusion having an outer diameter slightly larger than the outer diameter of the part is protruded, and an elastic protrusion is formed around the annular protrusion and protrudes toward the thread part side from the annular protrusion. A cord holder characterized by: