JPH11244546A - Drop mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drop mechanism which can be electrically and manually operated in accordance with the performances, the weight of a matter to be hung and the stage effect, and by which the stage can be effectively produced by utilizing the merits of the electrical operation and the manual operation. SOLUTION: A drop mechanism 1 comprises a counter weight 3 mounted for connecting both ends of an elevation operating rope, a wire rope 4 mounted at one end side of this counter weight 3, and hanging a baton B at the other end side through a main pulley 3a mounted at a wing upper part of a stage F and a plurality of pulleys W (W1) mounted at an upper part of the stage at specific intervals, and a contact and separate movable rotary pulley 5 which is moved to be contact with or separated from the wire rope 4 by a cylinder device S1 (contact and separate moving means) and rotated by a motor M.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension mechanism which can be driven up and down by switching between manual and electric depending on the purpose of use and the weight of the suspended object.

[0002]

2. Description of the Related Art A hanging mechanism that is placed on a stage ceiling of a theater, a hall, an arena, or the like, and that suspends curtains, stage equipment, props, lighting equipment, sound equipment, and the like on a baton and moves up and down,
There is a manual type, but in recent years, the lifting and lowering of the hanging mechanism on a stage having a relatively large scale has become an electric type controlled by a computer.

[0003]

However, in the case of an electrically driven hanging mechanism, the hanging object is moved at a constant speed. It is possible. Therefore, the suspended object may be controlled by a program that also takes into account such "intervals". However, since "intervals" are unique timings on the stage, it is necessary to predict and program in advance. Is impossible. And if you move the suspended object up and down without considering this “between”, the stage effect will be reduced,
The performance itself could be ruined.

The present invention has been made to solve the above-mentioned problems. According to the performance, the weight of a suspended object and the stage effect, a motorized type and a manual type are selectively used, and the stage is effectively utilized by utilizing the respective advantages. It is an object of the present invention to provide a hanging mechanism capable of producing an effect.

[0005]

In order to achieve the above-mentioned object, a lifting mechanism according to the present invention comprises an elevating operation rope extending over a lower pulley and an upper pulley, and both ends of the elevating operation rope. A counter weight interposed so as to be connected, and from this counter weight, a plurality of pulleys provided at predetermined intervals above the stage via a former pulley provided above the stage sleeve,
It has a wire rope for suspending the baton, and a contact / separation / rotation pulley that moves toward / away from the wire rope by the contact / separation moving means and is rotated by a motor.

[0006] As described above, if the lifting rope is operated manually, the suspended object suspended from the baton can be raised and lowered at an arbitrary timing and speed by the operator. If the pulley is moved downward by the contact / separation moving means to a position where the friction surface with the friction is sufficiently secured, and the pulley is rotated by a motor, the electric motor can be used to suspend the pulley. The lowered suspended object can be raised and lowered.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hanging mechanism according to the present invention comprises a lifting pulley extending over a lower pulley provided on the floor of a stage sleeve and an upper pulley provided above the lower pulley, A counterweight interposed so as to connect both ends of the operating rope, and one end of the counterweight is provided, and a pulley provided above the stage sleeve and a plurality of pulleys provided at predetermined intervals above the stage are provided. It has a wire rope that suspends the baton at the end side, and a contact / separation / rotation pulley that moves toward / away from the wire rope by the contact / separation moving means and is rotated by a motor.

[0008] According to the above configuration, in order to manually raise and lower the suspended object suspended from the baton, the operator operates the lifting operation rope. With the operation of the lifting rope, the wire rope is lifted and lowered via the original pulley and the plurality of pulleys via the counterweight which is balanced in the weight of the suspended object, and the suspended object is raised and lowered.

On the other hand, in order to move the suspended object up and down by electric power, the contact / separation / rotation pulley is moved downward by a contact / separation moving means, for example, a cylinder device provided on the stage ceiling. Then, the pulley is moved downward to a position where a sufficient frictional force can be obtained with respect to the wire rope, and if the pulley is rotated by a motor, the wire rope is vertically moved and the suspended object is raised and lowered. .

In the above structure, the hanging mechanism according to the present invention further comprises a moving pulley which is moved by the moving means near the contacting / separating / moving rotary pulley, and adjusts a winding angle of the wire rope around the contacting / separating / moving rotary pulley. If the moving pulley is moved so as to increase the size, the contact surface with the wire rope can be increased, that is, the frictional force can be increased even if the vertical stroke of the moving / rotating pulley is small.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hanging mechanism according to the present invention will be described below with reference to FIGS. FIG. 1 shows the configuration of the hanging mechanism of the present invention. FIG. 2 shows the vicinity of the moving pulley in the hanging mechanism according to the present invention. FIG. 3 shows another configuration of the pulling / moving turning pulley in the hanging mechanism according to the present invention. FIG. 4 shows another configuration of the hanging mechanism of the present invention.

Reference numeral 1 denotes a hanging mechanism of a baton B for hanging various curtains, props, and the like used for stage effects, and is configured as follows. Reference numeral 2 denotes a hemp elevating operation rope, for example, which is stretched over a lower pulley 2a provided on the floor of the sleeve of the stage F and an upper pulley 2b provided above the lower pulley 2a.

Reference numeral 3 denotes a counterweight interposed so as to connect both ends of the lifting operation rope 2, and the counterweight 3 increases or decreases the load so as to maintain the weight and balance of the suspended object. Reference numeral 4 denotes a counterweight 3, one end of which is provided at the upper end thereof, and a baton at the other end via a former pulley 3a provided above the sleeve of the stage F and a plurality of pulleys W provided at predetermined intervals above the stage F. B is a wire rope suspended. The pulleys W are respectively provided on plate-shaped members arranged above the stage at predetermined intervals, that is, on a so-called scallops T.

5 is provided between the original pulley 3a and a pulley adjacent to the original pulley 3a (hereinafter, only this pulley is specifically referred to as W1), and is provided with a pneumatic cylinder device S1 as a contact / separation moving means. It is a contact / separation turning pulley that moves toward and away from the wire rope 4 and is turned by a motor M. In this embodiment, since the cylinder device S1 is provided on the ceiling of the stage F in this embodiment, when the rod of the cylinder device S1 is projected, the contact surface with the wire rope 4 is increased. When the rod descends and the rod of the cylinder device S1 is retracted, it rises so as to release the contact of the wire rope 4.

The location of the cylinder device S1 is as follows.
Since the motor M for rotating the contact / separation / rotation pulley 5 is provided, it does not interfere with the movement pulley 6 or the pulley W1 described later when the contact / separation / movement rotation pulley 5 is moved toward and away from the vehicle.
The driving force of the motor M is transmitted to the contact / separation / rotation pulley 5 via an output shaft.

Reference numeral 6 denotes a movable pulley which is provided between the original pulley 3a and the moving / rotating pulley 5 and moves horizontally, for example, by a pneumatic cylinder device S2 as a moving means. As shown in FIGS. 2 (a) and 2 (b), for example, the movable pulley 6 places a movable table 6b provided with a pivotal support member 6a of the movable pulley 6 on a saw blade T. A connecting member 6c is provided on the lower surface to connect the rod ends of the horizontally arranged cylinder device S2.

Next, the lifting and lowering of the suspended object suspended on the baton B in the suspended object mechanism 1 having the above configuration will be described. For example,
If the suspended object needs to be raised and lowered irregularly due to the effect of the performance of the stage F, it is performed manually. In order to raise and lower the suspended object manually, the suspended object mechanism 1 moves the pulley 5 of the cylinder device S1 into and out of the wire rope 4, and moves the pulley 5 away from the wire rope 4, that is, as shown in FIG. As shown in ()), the wire rope 4 is not wound around the pull-off / moving turning pulley 5, and the moving pulley 6 is separated from the pulley W1 by the retreat of the rod of the cylinder device S2. Then, when the operator pushes and pulls the lifting operation rope 2 in a state where the load of the suspended object and the balance are maintained by the counterweight 3,
The suspended object moves up and down.

On the other hand, for example, when lifting and lowering a suspended object at a predetermined time, or when lifting and lowering a relatively heavy suspended object, the suspended object is moved up and down electrically. In this case, the cylinder S1
Of the moving pulley 6 which is now in the separated state
Between the moving pulley 6 and the pulley W
The contact / separation moving / rotating pulley 5 is lowered to a position lower than the arrangement height 1. By doing so, the vertical movement rotation pulley 5
Means that the contact surface with the wire rope 4 increases.

Thereafter, as shown in FIG. 1B, the rod of the cylinder device S2 is driven to protrude so that the movable pulley 6 approaches the pulley W1. In this state, the angle of the arc contacting with the wire rope 4 becomes, for example, 180 ° or more in this state, and a sufficient frictional force is applied between the pull-off and rotation pulley 5 and the wire rope 4. Can be obtained. Then, by rotating the motor M in the contact / separation / rotation pulley 5, the wire rope 4 is moved up and down by the contact / separation / rotation pulley 5, and the suspended object can be raised and lowered.

As described above, the hanging mechanism 1 of the present invention is provided with the moving / moving pulley 5 and the moving / pulling pulley 5 on the manually moving up / down feed path of the wire rope 4. 5 is lowered so that the contact surface with the wire rope 4 is increased, and the moving pulley 6 is moved so as to approach the pulley W1.
And it is possible to raise and lower the suspended object by electric power.For example, when it is necessary to make the lifting speed of the suspended object irregular depending on the performance or when the weight of the suspended object is relatively light For example, when it is necessary to lift and lower the suspended object at a constant speed or when the weight of the suspended object is relatively heavy, the suspended object can be selectively used for lifting and lowering.

In the above-described embodiment, the cylinder device S1 for moving the pulley 5 toward and away from the stage is provided on the ceiling of the stage F. For example, as shown in FIG. It may be arranged. In this case, a pivot 51 is provided on the ceiling, and the link
2, one end of the link plate 52 is mounted on the motor receiving stand 53, and the other end of the link plate 52 is coaxial with the pull-off / moving pulley 5 and the motor M. Pivot, and the cylinder device S1
The rod end may be pivotally supported. Even in this case, the same operation and effect as described above can be obtained.

The embodiment described above is based on the configuration according to claim 2 of the present invention. However, as an example corresponding to only claim 1, a configuration in which the moving pulley 6 and the cylinder device S2 are omitted. Becomes In other words, the moving pulley 6 in the above embodiment increases the contact surface of the wire rope 4 with the moving / rotating pulley 5 that moves down when it moves down.
As shown in FIG. 4A, the vehicle was approaching the pulley W1.

Therefore, if the descending stroke of the contact / separation / rotation pulley 5 is increased, the friction surface between the wire rope 4 and the contact / separation / rotation pulley 5 increases as shown in FIG. The moving pulley 6 and the like can be omitted. In this case, the pulley W may be fixedly disposed between the original pulley 3a and the pulley W1. Of course former pulley 3
The distance between the pulley W and the pulley W1 may be narrowed, and the moving / rotating pulley 5 may be provided therebetween. With such a configuration, the same operation and effect as described above can be obtained.

Further, in the above embodiment, the contact / separation moving means and the moving means are all pneumatic cylinder devices S
Although 1 and S2 have been described, the invention is not limited to this, and a lead screw feed mechanism that moves forward and backward by a motor, for example, may be used. Further, in the contact / separation moving / rotating pulley 5, an uneven portion for increasing a frictional force with the wire rope 4 may be formed on a contact surface with the wire rope 4.

In the above embodiment, the contact / separation / rotation pulley 5 is provided between the original pulley 3a and the pulley W1 adjacent to the original pulley 3a. However, the present invention is not limited to this. It may be provided between adjacent pulleys W, or may be provided between the original pulley 3a and the upper end of the counterweight 3 in FIG. 1 (a). The rotating pulley 5 moves horizontally approaching / separating from the pulley W1.
Although the winding angle between the wire rope 4 and the wire rope 4 is set to be large, the present invention is not limited to this.

[0026]

As described above, in the hanging mechanism according to the present invention, in order to raise and lower the suspended object manually, the operator operates the lifting / lowering operating rope to move the suspended object vertically. In this configuration, the contact / separation moving / rotating pulley is moved toward / away from the wire rope by the contact / separation moving means, and the motor is rotated by the motor. It is possible to switch between the manual type and the manual type, and to use the advantages of the electric type and the manual type properly according to the performance, the weight of the suspended object, and the stage effect, and to effectively produce the stage.

Further, in addition to the above-described structure, the hanging mechanism of the present invention includes a moving pulley which is moved by a moving means near the contact / separation moving / rotating pulley. Even if the lifting / lowering stroke of the pulling / moving pulley is small,
The angle at which the wire rope is wrapped around the pull-off / moving rotary pulley can be increased, increasing the contact surface with the wire rope.
That is, the frictional force can be increased.

[Brief description of the drawings]

FIG. 1 shows a schematic configuration of a hanging mechanism according to the present invention, wherein FIG. 1 (a) is a view as viewed from the direction of a passenger seat, and FIG. .

FIG. 2 shows a moving pulley in the suspension mechanism of the present invention,
(A) is the figure seen from the customer seat direction, (b) is the right side view of (a).

FIGS. 3A and 3B show another structure of the lifting / lowering structure of the moving / rotating pulley in the hanging mechanism according to the present invention, wherein FIG. 3A is a diagram for explaining the principle, and FIG. FIG. 3C is a left side view of the vicinity of the rotation pulley and the motor around the pulley when viewed from the direction of the passenger seat.

FIG. 4 shows another configuration of the suspension mechanism of the present invention,
(A) is a diagram for explaining the principle, and (b) is a diagram of the vicinity of the contact / separation / movement rotary pulley as viewed from the direction of the passenger seat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lifting mechanism 2 Elevating operation rope 4 Wire rope 5 Contacting / separating / moving rotating pulley 6 Moving pulley S1 Cylinder device (contact / separation moving means) S2 Cylinder device (moving means) M Motor B Baton

Claims (2)

[Claims] 1. A hanging mechanism for suspending and lifting a hanging object such as various curtains and props used for a stage effect, comprising a lower pulley provided on a floor surface of a stage sleeve and an upper part of the lower pulley. A lifting rope suspended over the upper pulley, a counterweight interposed so as to connect both ends of the lifting rope, and one end of the counterweight are provided above the stage sleeve. A wire rope for suspending the baton at the other end via the original pulley provided and a plurality of pulleys provided at a predetermined interval above the stage; And a pulling / moving rotary pulley. 2. A moving pulley which is provided in the vicinity of a pulling / moving rotating pulley and which is moved by a moving means in order to increase a winding angle of a wire rope around the pulling / moving rotating pulley. The suspension mechanism according to claim 1, wherein