JPH0416718Y2 - - Google Patents

Description

[Detailed explanation of the idea] 〔Technical field〕 This invention relates to a hanging device for a stage.

[Background technology]

A stage hanging device installed near the ceiling of a stage in a theater or the like is made up of a horizontally long bar (baton) suspended from several wire ropes that can be freely wound up and sent out so as to be movable up and down. Lighting equipment can be hung from the bar. Conventionally, stage hanging equipment has the following structure. In other words, as shown in Figure 1,
Several wire ropes 2, 2, 2 are suspended from a ceiling 1 formed by a large number of members 1a each having a U-shaped cross section arranged in a slatted manner. An oblong bar (baton) that is suspended and adapted to hang objects.
3, the wire rope 2 provided on the ceiling 1,
a winding drum 4 for winding up and feeding out the wire ropes 2, 2; and a parent pulley 5, which is provided at a position facing the winding drum 4 on the ceiling 1 and hangs the wire ropes 2, 2, 2 coming from the winding drum 4; and,
Several wire ropes 2 are provided between the parent pulley 5 and the winding drum 4 and come from the parent pulley 5,
2, 2, respectively, and a slave pulley 6 which was sent onto the bar 3. Further, guide pulleys 7, 7, 7 for guiding the upper rope 2a are provided slightly below the upper rope 2a. , 6, 6 or from getting entangled with the lower ropes 2b, 2b, 2b. This has the problem that when the lower ropes 2b, 2b, 2b become slack due to the bar 3 getting caught on something while going up and down, it falls off from the follower pulleys 6, 6, 6. Ta. In the figure, 8 is a motor that can rotate in forward and reverse directions.

[Purpose of invention]

Therefore, the object of this invention is to provide a stage hanging device in which there is no fear that the rope will fall off the slave pulley.

[Disclosure of invention]

In order to achieve the above purpose, the inventor completed this invention after extensive study.

This idea consists of a horizontally long bar 13 for hanging things for the stage, and a rope 12 installed on the ceiling.
Winding drum 14 for winding and feeding
and a master pulley 15 provided at a position facing the winding drum 14 in the ceiling, and a plurality of slave pulleys 16 provided between the master pulley 15 and the winding drum 14, The rope 12 sent out from the drum 14 is hung on the master pulley 15 and then connected to the bar 13 via the slave pulley 16, so that the bar 13 is raised and lowered by forward and reverse rotation of the winding drum 14. In this stage hanging device, a guide pulley 17 faces above each of the slave pulleys 16 with a rope 12 hung on the slave pulleys 16 interposed therebetween;
Each guide pulley 17 is provided with a stage hanging device characterized in that it is close to the slave pulley 16 such that the gap L between the side surface thereof and the side surface of the slave pulley is smaller than the diameter of the rope 12. This is the summary. This will be explained in detail below based on drawings showing examples thereof.

As shown in FIG. 3, in the stage hanging device according to this invention, wire ropes 12, 12, 12 are suspended from a ceiling portion 11 formed by a plurality of members 11a each having a U-shaped cross section arranged in a slatted manner. has been done. A horizontally long bar (baton) 13 is suspended from these wire ropes 12, 12, 12 so as to be able to rise and fall.
It is designed to hang lighting equipment (not shown), etc. The wire rope 1 is attached to the ceiling 11.
A winding drum 14 is provided for winding and unwinding the windings 2, 12, 12. The winding drum 14 is driven by a motor 8 that can rotate in forward and reverse directions. The mechanism by which the rotation of the motor 8 is transmitted to the winding drum 14 is, for example,
A bevel gear (not shown) is provided at the tip of the rotating shaft 8a of the motor 8, and this meshes with a bevel gear (not shown) provided on the circumferential surface of the shaft 14a of the winding drum 14. It is a structure where Ceiling part 1
1 is provided with a master pulley 15 at a position facing the winding drum 14. This is the wire rope 12, 12, coming from the winding drum 14.
Multiply by 12. An auxiliary pulley 18 is provided near the main pulley 15 so as to raise the sending position of the wire ropes 12, 12, 12. Between the master pulley 15 and the winding drum 14, slave pulleys 16, 16, 16 are provided at intervals. These slave pulleys 16, 16, 16 respectively hang wire ropes 12, 12, 12 coming from the master pulley 15, and feed each wire rope 12 onto the bar 13. Directly above each slave pulley 16,
As shown in FIG. 2, the guide pulley 16 is mounted on the same mount 19 as the slave pulley 16 so that it is supported by a bearing part 20 that is erected upward from the mount 19 to which the slave pulley 16 is attached. 17 are provided. This guide pulley 17 faces the slave pulley 16 with the wire rope 12 interposed therebetween, and a gap L formed between its side surface and the side surface of the slave pulley 16 is made smaller than the diameter d of the wire rope 12. Therefore, the wire rope 12 does not fall off from the slave pulley 16. Also, the upper rope 12a of the wire rope 12
Even if it becomes slack, it will not enter the gap L, so a situation where the slave pulley 16 gets caught will not occur. Each guide pulley 17 is connected to the lower rope 12a when the upper rope 12a heading from the winding drum 14 to the parent pulley 15 becomes slack.
It is designed to be supported and guided to prevent it from becoming entangled with b. In FIG. 2, 11a is a member forming the ceiling, and in FIG. 3, 15a is a main pulley 15.
and a mounting base bearing the auxiliary pulley 18.

The rope constituting the stage hanging device according to this invention was a wire rope in the embodiment. However, the rope may be made of natural fibers or synthetic fibers.

In the embodiment, an auxiliary pulley was provided near the main pulley. However, it does not need to be provided.

Although the guide pulley was provided directly above the slave pulley in the embodiment, it is not limited to that position. It may also be provided diagonally above the slave pulley.

In the example, the guide pulley and follower pulley were mounted on the same mount. This is convenient because both pulleys can be attached to the ceiling at the same time. Furthermore, since the mounting base can be saved, manufacturing costs can be reduced.
However, both pulleys may be mounted on separate mounts.

[Effect of idea]

As described above, the stage hanging device according to this invention consists of a horizontally long bar that is movably suspended from several ropes hanging from the ceiling and is designed to hang objects, and a horizontal bar that is attached to the ceiling. a winding drum for winding and feeding out the rope, a master pulley provided at a position facing the winding drum on the ceiling and hanging the rope coming from the winding drum, and a master pulley and the winding drum. A hanging device for a stage, which is equipped with several slave pulleys installed between the main pulleys, each of which has several ropes coming from the master pulley, and sends them onto the bar, and is located at a close position facing the slave pulley with the ropes in between. A guide pulley is provided to guide the rope from the take-up drum to the master pulley, and the gap between the sides of the guide pulley and slave pulley is smaller than the diameter of the rope. The effect is that the rope does not fall off. This also has the effect that even if the rope going from the take-up drum to the master pulley becomes slack, it will not get caught up in the slave pulley.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional stage hanging device, FIG. 2 is a front view showing a slave pulley and a guide pulley that constitute an embodiment of the stage hanging device according to this invention, and FIG. FIG. 2 is a front view showing, as a model, an embodiment of the stage hanging device according to the invention. 11...Ceiling section, 12...Wire rope, 13
... Bar, 14 ... Winding drum, 15 ... Main pulley, 16 ... Slave pulley, 17 ... Guide pulley, 1
9... Mounting base for slave pulley.

Claims (1)

[Scope of claim for utility model registration] (1) Horizontally long bar 1 for hanging things for the stage
3, a winding drum 14 provided on the ceiling for winding and feeding out the rope 12, a parent pulley 15 provided at a position facing the winding drum 14 on the ceiling, and this parent pulley 15 and the The rope 12 is provided with a plurality of follower pulleys 16 provided between the winding drum 14 and the rope 12 fed out from the winding drum 14.
is hung on the master pulley 15 and then connected to the bar 13 via the slave pulley 16, and the bar 13 is rotated in the forward and reverse directions of the winding drum 14.
This is a stage hanging device designed to raise and lower a stage. Above each of the slave pulleys 16, a guide pulley 17 faces each other with a rope 12 hung on the slave pulley 16 in between. , the gap L between the side surface and the side surface of the slave pulley is the rope 12.
A suspension device for a stage, characterized in that it is located close to the follower pulley 16 so that the diameter thereof is smaller than the diameter of the pulley 16. (2) The stage hanging device according to claim 1, wherein the guide pulley 17 is provided directly above the slave pulley 16 . (3) The guide pulley 17 is installed on the same mounting base 1 as the slave pulley 16 .
9. The stage hanging device according to claim 1 or 2 of the utility model registration claim, which is attached to a stage hanging device.