JPS644178Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a ball-chucking type hanging device used for hanging items such as fluorescent light boxes from the ceiling of a store. The material of the ball for the tracking ball has been improved to prevent wire cutting accidents.

[Conventional technology]

As prior art related to this type of ball-chucking type hanging device, for example, Japanese Utility Model Publication No. 42-14040, Publication of Japanese Utility Model Application No. 137072-1972, and Japanese Utility Model Application Publication No. 1983-1989
There are publications such as Publication No. 125767. In this method, a wire for suspending an article is freely inserted into a tapered cylinder, and at least one pair of balls is installed inside the cylinder, and any part of the hanging wire is directly clamped and fixed between the balls. Therefore, the length adjustment of the hanging wire can be easily obtained in line between the balls.

[The problem that the idea attempts to solve]

However, in a type where the hanging wire is made up of several dozen thin steel wires twisted together, and the hanging wire is directly sandwiched between hard steel balls, it is difficult to suspend heavy items and apply an excessive load. At this time, a portion of the spherical surface of the ball may locally strongly bite into a portion of the circumferential surface of the suspension wire, which tends to lead to an accident in which the suspension wire is eventually severed.

According to the inventor's knowledge, if a hanging wire made by twisting several dozen thin steel wires has a wire diameter of 1.5 mm and a steel wire ball has a diameter of 2.5 mm, an article weighing 40 to 50 kg can be suspended. , the hanging wire broke.

The present invention was proposed by focusing on this fact, and it improves the material of the balls, makes it easy to adjust the length of the hanging wire between the balls, and makes it possible to easily adjust the length of the hanging wire between the balls. However, the purpose is to enable the hanging wire to be hung safely and securely without breaking.

[Means to solve the problem]

As shown in the figure, the present invention includes a vertically elongated outer cylinder 8 in which an upwardly expanding tapered surface 12 is formed, a plurality of balls 14 inscribed in the tapered surface 12, and a vertically movable ball inside the outer cylinder 8. A ball holding cylinder 15 that is inserted and holds the ball 14 so as to be movable in the horizontal direction.
and a hanging wire 7 that is guided from the lower end of the insertion hole 16 of the ball holding cylinder 15 and inserted between the balls 14.
The hanging wire 7 is made of a metal material softer than the hanging wire 7 made of a steel wire.

[Effect]

When the hanging wire 7 is inserted between the balls 14 and the article 6 is suspended from the hanging wire 7, the hanging wire 7 is directly held between the balls 14. At this time, the hanging wire 7
When an excessive suspension load is applied to the suspension wire 7, a portion of the spherical surface of the ball 14 is crushed and deformed to match the shape of a portion of the peripheral surface of the suspension wire 7 before the suspension wire 7 is crushed.

[Effect of idea]

Therefore, according to the present invention, by inserting the hanging wire 7 into the insertion hole 16 of the ball holding cylinder 15 from the lower end as in the conventional manner, the hanging wire 7 is inserted into the ball 1 at a desired position.
4, but the hanging wire 7
When an excessive suspension load is applied to the suspension wire 7, the ball 14 side crushes and deforms along the uneven shape of a part of the circumferential surface of the suspension wire 7 and is crimped in a state of surface contact, so the suspension wire 7 is not cut and is safe and secure. The article 6 can be hung on.

〔Example〕

The drawing shows an example of a hanging fixture for hanging a fluorescent lamp from the ceiling.

In Figure 1, 1 is the ceiling surface, 2 is the ceiling panel,
3 is the attic space formed between the ceiling surface 1 and the ceiling panel 2, 4 is the attic horizontal frame installed in the attic space 3, 5 is the proposed hanging fixture, and 6 is the hanging fixture 5. This is an item (fluorescent light box) that is suspended from the bottom end.

In Fig. 2, the hanging fixture 5 of the present invention consists of a hanging wire 7 made by twisting a large number of thin steel wires together, a vertically long outer cylinder 8 fixed to the ceiling side, and a vertically long outer cylinder 8 that is incorporated inside the outer cylinder 8 for hanging. Ball chucking means 9 that allows the wire 7 to be inserted freely and clamped and fixed at an arbitrary length
and has.

The outer cylinder 8 of this hanging fixture 5 is composed of a metal pipe having a sufficient length to extend between the ceiling panel 2 and the attic horizontal member 4, and has an external thread 10 at its upper end and an internal thread 11 at its lower end. It is provided.

The ball chucking means 9 includes a tapered tube 13 which is screwed into the lower end of the outer tube 8 from below and has an upwardly expanding tapered surface 12 therein, and a tapered tube 13 which is inscribed in the tapered surface 12 and which is connected to the hanging wire 7. Three balls 14 made of brass, etc., which is a softer metal than wire rod.
and a ball holding cylinder 15 that is vertically movably inserted into the outer cylinder 8 and holds the ball 14 so as to be movable in the horizontal direction.

The ball holding cylinder 15 has an insertion hole 16 in the center through which the hanging wire 7 can be freely inserted, and an upwardly expanding conical part 17 that coincides with and is inscribed in the tapered surface 12 at approximately the center in the vertical direction of its outer peripheral surface. The conical portion 17 has three ball holes 18 in the circumferential direction for holding the ball 14 horizontally so as to be freely retractable.
There are individual rows.

The upper end of the conical part 17 of the ball holding cylinder 15 and the outer cylinder 8
A spring 19 is interposed between the inner spring holder 20 and the ball retaining cylinder 15 as a whole due to the elastic force of the spring 19. It is designed to be in close contact with

When using the hanging fixture 5 of the present invention, the upper end of the outer cylinder 8 is inserted into the hole 21 of the attic horizontal member 4, and the nut 22 is tightened onto the external screw 10 from above the horizontal member 4. An outer cylinder 8 is received and supported by the horizontal member 4, and the lower end of the outer cylinder 8 is inserted into a hole 23 made in the ceiling panel 2. At this time, a washer 24 is interposed between the ceiling panel 2 and the tapered cylinder 13 to close the hole 23 in the ceiling panel 2.

When attaching the hanging wire 7 to the hanging fixture 5, insert the hanging wire 7 from the lower end of the ball holding tube 15 projecting downward from the ceiling panel 2 into the insertion hole 16 of the hanging wire 7 at the upper end, which has been detented by soldering or the like. Insert section 7a. Then, the upper end portion 7a of the hanging wire 7 hits the ball 14 and pushes up the ball holding cylinder 15 a little against the spring 19, and the interval between the balls 14 is widened along the tapered surface 12, and the hanging wire 7 can be pushed between the balls 14 to a predetermined upper height.

When the pushing of the hanging wire 7 is stopped, the ball holding tube 15 is pushed down into the narrow space of the tapered surface 12 in a wedge-like manner by the force of the spring 19, and the hanging wire 7 is thus held between the balls 14. From this state, when the article 6 is fixed to the lower end of the hanging wire 7 via the attachment piece 25, as a pull-down load is applied to the hanging wire 7, the distance between the balls 14 becomes narrower and narrower, causing the hanging wire 7 to come out downward. to prevent

At this time, if an excessive hanging load is applied to the hanging wire 7, since the ball 14 is made of a metal material softer than the hanging wire 7, the hanging wire 7 may be crushed as shown in FIG. Beforehand, the contact portion of the ball 14 with the hanging wire 7 is crushed and deformed along the spiral irregularities on the circumferential surface of the hanging wire 7, and the ball 14
A part of the spherical surface is crimped to a part of the circumferential surface of the hanging wire 7 in sufficient surface contact. Therefore, there is no local biting into the hanging wire 7, and breakage due to this biting can be prevented.

In the present invention, the tapered tube 13 may be omitted and the tapered surface 12 may be integrally formed on the inner surface of the outer tube 8.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing the usage state in which an article is hung with the hanging tool according to the present invention, Fig. 2 is a longitudinal cross-sectional view of the hanging tool of the present invention, and Fig. 3 shows the state in which the hanging wire is crimped by the ball. FIG. 3 is an enlarged vertical cross-sectional view of the main part to be explained. 7... Hanging wire, 8... Outer cylinder, 12... Tapered surface, 14... Ball, 15... Ball holding cylinder, 1
6...Insertion hole of ball holding cylinder.

Claims (1)

[Claims for Utility Model Registration] A vertically long outer cylinder 8 in which an upwardly expanding tapered surface 12 is formed, and a plurality of balls 14 inscribed in the tapered surface 12.
The ball 1 is inserted into the outer cylinder 8 so as to be movable up and down.
4, and a hanging wire 7 that is guided from the lower end into an insertion hole 16 of the ball holding tube 15 and inserted between the balls 14, A hanging tool characterized in that it is made of a metal material softer than the hanging wire 7 made of a steel wire.