JPH0633138Y2 - Mechanical synchronization mechanism for stage lifts - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a mechanical synchronizing mechanism of a stage lifting device, particularly a stage in which the amount of expansion and contraction of an electric screw jack is adjusted to raise and lower the stage horizontally. The present invention relates to a mechanical synchronization mechanism of a lifting device.

(Prior Art) Conventionally, in a theater or the like equipped with a large stage device, a mechanism for raising and lowering the stage is often provided, and the stage is formed by expanding and contracting a pair of independent electric screw jacks. Can be raised and lowered.

FIG. 6 is a diagram showing a conventional stage lifting device.

In the figure, 1 is a stage supported on a floor surface 2 so as to be vertically movable. A pair of pillars 3 extend between the stage 1 and the floor surface 2, one end of the pillar 3 is swingably supported by a fixed portion 5 of the stage bottom surface 4, and the other end of each pillar 3 is a floor. Surface 2
And wheels 6 and 6'which are reciprocally disposed on the top of the vehicle.

In addition, each of the columns 3 has an auxiliary column 7 pivotally supported substantially in the center thereof, and the other end of the auxiliary column 7 has an auxiliary fixing portion 8 arranged at a position facing the fixing portion 5 of the floor surface 2. It is swingably supported by.

The stage elevating device having the above-described configuration includes a pair of electric screw jacks 9 that are expanded and contracted by driving a motor (not shown). One end of the electric screw jack 9 is fixed to the stage bottom surface 4 and the other end of the rod 10 is fixed to the wheels 6 and 6 ′. , 6'reciprocate, and the stage 1 takes up an ascending position shown by a solid line and a descending position shown by a chain double-dashed line.

Since each of the above-mentioned members is swingably supported by the pin 11, it can relatively freely rotate.

(Problems to be Solved by the Invention) However, in the above-described conventional stage lifting apparatus, since the pair of electric screw jacks 9 are independently expanded and contracted by driving the motor, the expansion and contraction of each electric screw jack 9 is performed. Is difficult to synchronize.

Therefore, each of the pair of wheels 6 and 6'moves a different distance, for example, only one wheel 6 moves to the position A in FIG. 6, and the column 8 and the electric screw jack 9 are moved as shown by the broken line in the figure. In such a state, the stage 1 cannot be kept in a horizontal state, and the stage 1 is moved up and down while being inclined.

Therefore, there is provided a stage elevating device that detects the position of the stage 1 or the expansion / contraction state of the electric screw jack 9 by an encoder or the like to control the electric machine and adjust the electric screw jack 9 to prevent the stage 1 from tilting. , The required cost will be high.

The present invention solves the above-mentioned problems of the conventional stage lifting device, and can raise and lower the stage in a horizontal state only by using mechanical means, and can lower the cost. It is an object to provide a mechanical synchronization mechanism for a device.

(Means for Solving the Problems) Therefore, in the mechanical synchronization mechanism of the stage lifting apparatus of the present invention, a pair of wheels that reciprocate on the floor and one end thereof is swingably connected to each wheel. A pair of stanchions with the other end swingably connected to a fixed part on the bottom of the stage, and one end swingably connected to each wheel and the other end fixed to the bottom of the stage equidistant from the fixed part. It has a pair of electric screw jacks and a wheel movement amount regulation member that equalizes the movement amount of each wheel as the stage moves up and down.

The wheel movement amount restricting member is composed of a pair of racks fixed to the wheels and reciprocating in the horizontal direction, and a pinion rotating between the racks.

In another mechanical synchronization mechanism of the stage lifting device of the present invention, a pair of wheels reciprocating on the floor surface, one end swingably connected to each wheel and the other end swinging to a fixed part on the bottom of the stage. A pair of movably connected stanchions, a pair of electric screw jacks, one end of which is swingably connected to each wheel and the other end of which is fixed to the bottom of the stage equidistant from the fixed part, and the stage is moved up and down. And a wheel movement amount regulating member that equalizes the movement amount of each wheel.

The wheel movement amount regulating member is composed of an endless chain, and the wheels are fixed to portions of the endless chain that move in opposite directions.

In the mechanical synchronization mechanism of still another stage lifting device of the present invention, a pair of wheels reciprocating on the floor surface, one end swingably connected to each wheel and the other end fixed to the bottom of the stage. A pair of swingable columns, a pair of electric screw jacks, one end of which is swingably coupled to each wheel and the other end of which is fixed to the bottom of the stage equidistant from the fixed portion, And a wheel movement amount regulating member that equalizes the movement amount of each wheel as it goes up and down.

The wheel movement amount regulating member has a pair of sub wheels reciprocating along a guide on the bottom of the stage, one end swingably connected to each sub wheel, and the other end swinging to a fixed portion on the floor. It consists of a pair of movably connected sub-columns, and the sub-columns are pivotally supported on the column.

(Operation) According to the present invention, as described above, in the mechanical synchronizing mechanism of the stage elevating device, a pair of wheels reciprocating on the floor and one end swingably connected to each wheel and the other end Is a pair of stanchions swingably connected to a fixed portion on the bottom of the stage, and a pair of struts one end of which is swingably connected to each wheel and the other end of which is fixed to the bottom of the stage equidistant from the fixed portion. It has an electric screw jack and a wheel movement amount regulating member that equalizes the movement amount of each wheel as the stage moves up and down.

The wheel movement amount restricting member is composed of a pair of racks fixed to the wheels and reciprocating in the horizontal direction, and a pinion rotating between the racks.

In this case, when the stage is moved up and down, the pinions rotate and the racks move in opposite directions. At this time, the movement amounts of the wheels are equalized by the action of the rack and the pinion, and the wheels move in the opposite directions by the equal distance.

In another mechanical synchronization mechanism of the stage lifting device of the present invention, a pair of wheels reciprocating on the floor surface, one end swingably connected to each wheel and the other end swinging to a fixed part on the bottom of the stage. A pair of movably connected stanchions, a pair of electric screw jacks, one end of which is swingably connected to each wheel and the other end of which is fixed to the bottom of the stage equidistant from the fixed part, and the stage is moved up and down. And a wheel movement amount regulating member that equalizes the movement amount of each wheel.

The wheel movement amount regulating member is composed of an endless chain, and the wheels are fixed to portions of the endless chain that move in opposite directions.

In this case, when the stage is moved up and down, the above-mentioned endless chain is caused to travel, and the portions on the endless chain where the wheels are fixed move in the opposite direction. At this time, the movement amount of each wheel becomes equal due to the action of the endless chain, and each wheel moves in the opposite direction by the equal distance.

In the mechanical synchronization mechanism of still another stage lifting device of the present invention, a pair of wheels reciprocating on the floor surface, one end swingably connected to each wheel and the other end fixed to the bottom of the stage. A pair of swingable columns, a pair of electric screw jacks, one end of which is swingably coupled to each wheel and the other end of which is fixed to the bottom of the stage equidistant from the fixed portion, And a wheel movement amount regulating member that equalizes the movement amount of each wheel as it goes up and down.

The wheel movement amount regulating member has a pair of sub wheels reciprocating along a guide on the bottom of the stage, one end swingably connected to each sub wheel, and the other end swinging to a fixed portion on the floor. It consists of a pair of movably connected sub-columns, and the sub-columns are pivotally supported on the column.

In this case, the support column and the sub support column are rotatably connected about one axis, and the sub wheel reciprocates along the guide.
The movement amount of each wheel becomes equal, and each wheel travels in the opposite direction by an equal distance.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a mechanical synchronizing mechanism diagram of the stage lifting apparatus of the present invention, and FIG. 2 is a view showing a rack and pinion used in the mechanical synchronizing mechanism of the stage lifting apparatus of the present invention.

In the figure, as in the conventional stage lifting device, 1 is a floor surface 2
It is a stage that is movably supported up and down.
A pair of pillars 3 extend between the stage 1 and the floor surface 2, one end of the pillar 3 is swingably supported by a fixed portion 5 of the stage bottom surface 4, and the other end of each pillar 3 is a floor. Wheels 6, 6'are arranged on the surface 2 so as to be reciprocally movable.

In addition, each of the columns 3 has an auxiliary column 7 pivotally supported substantially in the center thereof, and the other end of the auxiliary column 7 has an auxiliary fixing portion 8 arranged at a position facing the fixing portion 5 of the floor surface 2. It is swingably supported by.

The stage elevating device having the above-described configuration includes a pair of electric screw jacks 9 that are expanded and contracted by driving a motor (not shown). One end of the electric screw jack 9 is fixed to the stage bottom surface 4 and the other end of the rod 10 is fixed to the wheels 6 and 6 ′. , 6'reciprocate, and the stage 1 takes up an ascending position shown by a solid line and a descending position shown by a chain double-dashed line.

Since each of the above-mentioned members is swingably supported by the pin 11, it can relatively freely rotate.

Here, in the mechanical synchronizing mechanism of the stage lifting device of the present invention, two movably supported racks 15 and 15 'are horizontally provided on the floor surface 2, and each of the wheels 6 and 6 has the above-mentioned wheels 6 and 6.
It is fixed to either 6 '. For example, wheels 6 are racks
At 15, wheels 6'are fixed to the rack 15 'so that they can move together. Further, a pinion 17 for moving the racks 15 and 15 'in common is disposed between the racks 15 and 15', and the racks 15 and 15 'are moved in mutually opposite directions as the pinion 17 rotates.

Here, when one of the electric screw jacks 9 operates differently from the other, and only one of the electric screw jacks 9 tries to contract, the support column 3 on the contracting side follows and tilts. Try to increase the movement amount of the wheels 6, 6 '. However, as described above, the movement amount of the wheel 6 and the movement amount of the wheel 6'are always equalized by the action of the racks 15 and 15 'and the pinion 17, so that only one wheel cannot move much. Therefore,
Only one of the electric screw jacks 9 cannot contract, and the stage 1 is kept horizontal.

Next, referring to FIGS. 3 and 4, a mechanical synchronizing mechanism of a stage lifting device showing another embodiment of the present invention will be described.

In this embodiment, the floor surface 2 has two endless chains 2
1, 21 'are arranged horizontally. The endless chains 21, 21 '
Have a common sprocket 22 and said sprocket
It is stretched in the opposite direction with 22 in the middle. Then, one wheel 6 is fixed to the upper side 23 of the one endless chain 21, and the other wheel 6'is fixed to the lower side 24 of the other endless chain 21 '.

Therefore, both wheels 6 and 6'move in opposite directions, and since each endless chain 21, 21 'moves via the common sprocket 22, each endless chain 21, 21'.
Are equal to each other, and the stage 1 can be kept horizontal as in the above-described embodiment.

In this embodiment, two endless chains 21,
21 'is arranged, but two endless chains are not necessarily required, and one endless chain is arranged on the floor surface 2,
One wheel 6 is on the upper side of the endless chain and the other wheel 6 '
May be disposed below the endless chain.

Next, FIG. 5 shows still another embodiment.

In this embodiment, a pair of guides are provided on the bottom surface 4 of the stage 1.
31 is provided, and a pair of auxiliary wheels 32, 32 'that are reciprocated by being guided by each guide 31 are provided. Then, the sub wheels 32,
The reference numeral 32 ′ is swingably supported on one end side of the pair of sub-support columns 33, and the other end side of the sub-support columns 33 is swingably fixed to the fixing portion 34 of the floor surface 2.

Further, a pin 35 is arranged at substantially the center of the auxiliary column 33, which pivotally supports the substantially center of the column 3 so that they can swing relative to each other.

With such a structure, for example, when only one of the electric screw jacks 9 contracts to move the wheel 6 and the auxiliary wheel 32 to the right in the figure, the auxiliary wheel 32 'is guided.
Since it cannot be separated from the guide 31, it slides in the guide 31 and moves to the left to equalize the left and right movement amounts. At this time, the wheel 6 ′ also moves by the same amount as the wheel 6, so that the stage 1 is kept horizontal.

The present invention is not limited to the above embodiment,
Various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the Invention) As described in detail above, according to the present invention, in the mechanical synchronizing mechanism of the stage lifting device, a pair of wheels that reciprocate on the floor surface and one end of which swings freely to each wheel. A pair of stanchions that are connected and the other end is swingably connected to a fixed part on the bottom of the stage, and one end is swingably connected to each wheel and the other end is equidistant from the fixed part. And a pair of electric screw jacks fixed to the wheel, and a wheel movement amount regulating member for equalizing the movement amount of each wheel as the stage moves up and down.

The wheel movement amount restricting member is composed of a pair of racks fixed to the wheels and reciprocating in the horizontal direction, and a pinion rotating between the racks.

In this case, when the stage is moved up and down, the pinions rotate and the racks move in opposite directions. At this time, the movement amounts of the wheels are equalized by the action of the rack and the pinion, and the wheels move in the opposite directions by the equal distance.

Therefore, both electric screw jacks contract by the same amount, and the stage can be raised and lowered in a horizontal state. Also, even when similar stages are adjacent to each other, they will not interfere with other stages.

Further, since the synchronization mechanism is configured only by using mechanical means, the cost can be reduced.

In another mechanical synchronization mechanism of the stage lifting device of the present invention, a pair of wheels reciprocating on the floor surface, one end swingably connected to each wheel and the other end swinging to a fixed part on the bottom of the stage. A pair of movably connected stanchions, a pair of electric screw jacks, one end of which is swingably connected to each wheel and the other end of which is fixed to the bottom of the stage equidistant from the fixed part, and the stage is moved up and down. And a wheel movement amount regulating member that equalizes the movement amount of each wheel.

The wheel movement amount regulating member is composed of an endless chain, and the wheels are fixed to portions of the endless chain that move in opposite directions.

In this case, when the stage is moved up and down, the above-mentioned endless chain is caused to travel, and the portions on the endless chain where the wheels are fixed move in the opposite direction. At this time, the movement amount of each wheel becomes equal due to the action of the endless chain, and each wheel moves in the opposite direction by the equal distance.

Therefore, both electric screw jacks contract by the same amount, and the stage can be raised and lowered in a horizontal state. Also, even when similar stages are adjacent to each other, they will not interfere with other stages.

Further, since the synchronization mechanism is configured only by using mechanical means, the cost can be reduced.

In the mechanical synchronization mechanism of still another stage lifting device of the present invention, a pair of wheels reciprocating on the floor surface, one end swingably connected to each wheel and the other end fixed to the bottom of the stage. A pair of swingable columns, a pair of electric screw jacks, one end of which is swingably coupled to each wheel and the other end of which is fixed to the bottom of the stage equidistant from the fixed portion, And a wheel movement amount regulating member that equalizes the movement amount of each wheel as it goes up and down.

The wheel movement amount regulating member has a pair of sub wheels reciprocating along a guide on the bottom of the stage, one end swingably connected to each sub wheel, and the other end swinging to a fixed portion on the floor. It consists of a pair of movably connected sub-columns, and the sub-columns are pivotally supported on the column.

In this case, the support column and the sub support column are rotatably connected about one axis, and the sub wheel reciprocates along the guide.
The movement amount of each wheel becomes equal, and each wheel travels in the opposite direction by an equal distance.

Therefore, both electric screw jacks contract by the same amount, and the stage can be raised and lowered in a horizontal state. Also, even when similar stages are adjacent to each other, they will not interfere with other stages.

Further, since the synchronization mechanism is configured only by using mechanical means, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a mechanical synchronizing mechanism diagram of the stage lifting device of the present invention, FIG. 2 is a diagram showing a rack and pinion used in the mechanical synchronizing mechanism of the stage lifting device of the present invention, and FIG. 3 is a diagram of the present invention. FIG. 5 is a mechanical synchronizing mechanism diagram of a stage lifting device showing another embodiment, and FIG. 4 is a diagram showing an endless chain used in a mechanical synchronizing mechanism of a stage lifting device showing another embodiment of the present invention. FIG. 6 is a mechanical synchronizing mechanism diagram of a stage raising / lowering device showing still another embodiment of the present invention, and FIG. 6 is a diagram showing a conventional stage raising / lowering device. 1 ... Stage, 2 ... Floor surface, 3 ... Posts, 4 ... Stage bottom, 5,34
... Fixing part, 6,6 '... Wheels, 7 ... Auxiliary column, 8 ... Auxiliary fixing part, 9 ... Electric screw jack, 10 ... Rod, 15,1
5 '... Rack, 17 ... Pinion, 21, 21' ... Endless chain, 22 ... Sprocket, 31 ... Guide, 32, 32 '... Secondary wheel, 33 ... Secondary column.

Claims (3)

[Scope of utility model registration request] 1. A pair of wheels that reciprocate on a floor surface, and a pair of columns whose one end is swingably connected to each wheel and the other end is swingably connected to a fixed portion on the bottom of the stage. A pair of electric screw jacks, one end of which is swingably connected to each wheel and the other end of which is fixed to the bottom of the stage equidistant from the fixed portion, and wheels which equalize the movement amount of each wheel as the stage moves up and down. A stage having a movement amount regulating member, wherein the wheel movement amount regulating member includes a pair of racks fixed to each wheel and reciprocating in the horizontal direction, and a pinion rotating between the racks. Mechanical synchronization mechanism of the lifting device. 2. A pair of wheels that reciprocate on a floor surface, and a pair of columns whose one end is swingably connected to each wheel and the other end is swingably connected to a fixed portion on the bottom of the stage. A pair of electric screw jacks, one end of which is swingably connected to each wheel and the other end of which is fixed to the bottom of the stage equidistant from the fixed portion, and wheels which equalize the movement amount of each wheel as the stage moves up and down. A mechanical type of a stage lifting device, characterized in that it has a movement amount regulating member, and the wheel movement amount regulating member comprises an endless chain, and the wheels are fixed to portions of the endless chain that move in opposite directions. Synchronization mechanism. 3. A pair of wheels that reciprocate on a floor surface, and a pair of columns whose one end is swingably connected to each wheel and the other end is swingably connected to a fixed portion on the bottom of the stage. A pair of electric screw jacks, one end of which is swingably connected to each wheel and the other end of which is fixed to the bottom of the stage equidistant from the fixed portion, and wheels which equalize the movement amount of each wheel as the stage moves up and down. A pair of sub wheels that reciprocate along a guide on the bottom of the stage, and one end swingably connected to each sub wheel and the other end A mechanical synchronizing mechanism for a stage lifting device, comprising a pair of sub-posts swingably connected to a fixed portion on the floor, and the sub-posts being pivotally supported on the posts. .