JP2572965Y2 - Lifting stage - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting stage which is easy to handle.

[0002]

2. Description of the Related Art Heretofore, even on a relatively small stage, the stage plate is heavy and requires a considerable amount of force to move up and down, making it difficult to handle. In addition, if mechanical means such as a cylinder device is used, equipment costs are increased, and there is a problem in that maintenance is troublesome. Therefore, there is no simple stage in which a woman can perform a lifting operation.

[0003]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to make it possible to move up and down with a light force by bringing a stage plate close to no load without using mechanical means such as a cylinder device.

[0004]

According to the present invention, a link piece having one end rotatably connected and fixed to a base portion is slidably engaged with a rail provided on the back side of the stage portion. At the same time, the other end of the link piece whose one end is rotatably connected and fixed to the stage section is slidably engaged with a rail provided on the base section, and each link piece is pin-connected to the intersection thereof. A stage that can be moved up and down in preparation for a pantograph system. A coil spring is provided on the stage or base, and one end of a traction member is locked to a link piece, and a guide is provided at a connection fixing portion of the link piece. The traction member is engaged with the outer periphery of the wheel, inverted and connected to the coil spring, and further provided with a stopper for immobilizing the link piece. The stopper mechanism projects and accommodates a pin at the other end of the link piece slidably engaged with the rail of the stage or base, and engages with the pin provided through the stage or base. A configuration may also be adopted in which the pin is urged to protrude and engage with the stop hole.

[0005]

[Action] The traction member, one end of which is locked to the link piece, is connected to the coil spring via the guide wheel, and the tension is adjusted slightly by the adjustment of the coil spring to urge the heavy stage upward and the stage is raised. It is arranged in a state close to no load.
When the stage section descends and approaches the base section, the length of the traction material wrapped around the outer periphery of the guide wheel increases, and the coil spring is strongly pulled. Therefore, the stage is strongly urged upward by the restoring force of the coil spring, so that the stage can be moved upward with a weak force. That is, the coil spring is pulled by a difference corresponding to the length of the winding around the outer peripheral portion of the guide wheel, and becomes the upward biasing force.

In order to descend the stage, the stage should be pushed down, and the stage descends slowly because the upward bias acts on the heavy stage. If the link piece is immobilized by the stopper mechanism at the lower end of the stage section and at the rising position of the stage section, the stage section stops.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
In this example shown in FIG. 3 to FIG. 3, reference numeral 1 denotes a stage board, which is supported by front, rear, left and right support members 11. The shaft 12 is attached to the ends of the support members 11 on both sides to rotatably support the guide wheel 13, and one end of the link piece 21 is attached rotatably. The support member 11 has a spring box 31.
Are rockable so that bolts 32 are fixed.
The coil spring 3 in which the spring holding rod 33 is inserted is housed therein, and the rod end 34 protrudes from the spring box 31 and faces the guide wheel 13. The chain 35 locked to the link piece 21 is wound around the guide wheel 13 and connected to the rod end 34.

On the other hand, a shaft 42 is mounted on the end of the base 4 to rotatably support the guide wheel 43, and one end of the link piece 22 is rotatably mounted. As described above, a spring box 31 is swingable on the base 4 so that the bolt 3
The coil spring 3 in which the spring holding rod 33 is inserted is housed in the spring box 31, and the rod end 34 protrudes from the spring box 31 and faces the guide wheel 43. Then, the chain 35 locked to the link piece 22 is
And connected to the rod end 34. In addition, the coil spring 3 is set to be slightly pulled or adjusted by rotation adjustment of the adjusting nut 36 screwed to the end of the spring holding rod 33, and the heavy stage portion at the ascending position is arranged in a state close to no load.

A rail 14 is fixed to the inner surface of the support member 11, and a roller 23 is attached to the other end of the link piece 22.
Is mounted on the rail 14 so as to be rollable. A rail 44 is also fixed to the inner surface of the base portion 4, and the roller 24 attached to the other end of the link piece 21 is placed on the rail 44 so as to be rollable. Thereby, the link piece 21,
22 is connected to a pin 25 at the center crossing to form a pantograph. In this example, such a configuration is provided at both front and rear sides.

At the other end of the link piece 22, a stopper pin 52 urged by a spring 51 is housed on the roller 23 as shown in FIG. The projection of the pin 52 can be released, and the stopper pin 52 is inserted into one of the multiple locking holes 15 communicating with the rail 14 and the support member 11 to form a stopper mechanism. Although not shown, remote control of the wire 53 is performed by grasping a knob connected to the wire 53 so that the wire 53 is pulled and the stopper pin 52 is pulled.
Can be released and the knob can be released by releasing the knob.
2 protrudes.

Next, the operation of this embodiment will be described. When the stage 1 in FIG. 2 is raised, the heavy stage plate 1 is urged slightly upward by the restoring force of the coil spring 3 by adjusting the rotation of the adjustment nut 36, so that the stage plate 1 is in a state close to no load.
Therefore, when lowering the stage board 1 from this state, the stage board 1 may be pushed down by hand, and the heavy stage board 1 is urged upward because of the upward urging force. As shown in FIG. The stage section is superimposed on the base section 4 to form a floor.

When the stage board 1 is lowered, the link pieces 2
5 are displaced by the rolling of the rollers 23, 24 at the other end, and FIG.
As they approach each other horizontally, the chain 3
The length of winding of the guide wheels 13 and 43 around the outer periphery is increased, and the coil spring 3 is strongly pulled. Therefore, when it is desired to raise the stage plate 1, the stage plate 1 may be lifted with a light force, and the stage plate 1 is easily urged upward by the restoring force of the coil spring 3.
Can be moved up.

That is, as shown in FIG.
The coil spring is pulled by an amount corresponding to the difference in the length of winding around the outer peripheral portion of the coil spring 6 and becomes an upward biasing force. Therefore, the upward biasing force increases as the stage board 1 descends, and the stage board 1 can be operated with a light force. Although the illustration describes the coil spring relationship on the stage plate 1 side, the coil spring relationship on the base 4 also has the same effect.

When stopping at the lower end of the stage plate 1 and the arbitrary use of the stage portion, the stopper pin 52 is urged and projected by a spring 51 by remote operation of a wire 53, as shown in FIG. Then, the stopper pin 52 is inserted into one of the corresponding locking holes 15 so that the link piece 22 becomes immobile and the stage board 1 stops. In FIG. 6, the stage board 1 is stopped at a low position. Conversely, when the stage board 1 is raised and lowered, the stopper pin 52 is pulled inward by remote control of the wire 53 and pulled out from the locking hole 15.

As described above, according to this embodiment, since the heavy stage plate 1 is urged upward by the restoring force of the coil spring 3, a balance close to a no-load state is obtained. And the stage board 1 can be moved up and down slowly, which is safe.

Although the present embodiment is configured as described above, the present invention is not limited to this. For example, the shapes and configurations of the stage and the base are not limited. Further, the mounting configuration of the coil spring provided on the stage or the base is not limited. Alternatively, the types of the traction member and the guide wheel are also appropriate. The number of coil springs provided is also arbitrary, and may be increased or decreased according to the weight of the stage.

Further, regardless of the configuration of the stopper mechanism for immobilizing the link piece, as shown in FIGS. 7 and 8, a pair of rollers 2 rolling the rail 14 of the stage and connecting to the link piece 22 are used.
A screw cylinder 26 may be fixed to the connecting arms 25 of the base plates 3 and 24, and a trapezoidal screw rod 27 may be screwed onto the screw cylinder 26, and a bevel gear pair 28 may be provided at the tip of the trapezoidal screw rod 27. By rotating the bevel gear pair 28 with the electric screwdriver 29, the trapezoidal screw rod 27 is
The screw cylinder 26 can be fed by the screw.
The stage section can be moved up and down by rolling the link pieces 3 and 24 and displacing the link pieces 22, and the link pieces 22 are fixed by screwing the trapezoidal screw rods 27 with the screw cylinders 26. Even with this configuration, the electric screwdriver 29 can be operated with a light force because the stage is almost unloaded by the coil spring.

[0018]

[Effect of the Invention] According to the present invention, the stage board can be moved up and down with a light force because the restoring force of the coil spring balances the weight with the stage board near no load. You can. According to claim 2, it is possible to easily stop the stage board.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an embodiment of the present invention.

FIG. 2 is a side view in which the stage is raised.

FIG. 3 is an enlarged side view of the main part.

FIG. 4 is an enlarged vertical sectional front view showing the stopper mechanism.

FIG. 5 is a side view showing the action of the coil spring at the lowered position of the stage.

FIG. 6 is a side view of a state where the stage is stopped at a low position.

FIG. 7 is a plan view of a main part of another example of the stopper mechanism without a stage plate.

FIG. 8 is a side view of the main part.

[Explanation of symbols]

 Reference Signs List 1 stage plate 11 support member 13, 43 guide wheel 14, 44 rail 15 locking hole 21, 22 link piece 23, 24 roller 25 connecting arm 26 screw cylinder 27 trapezoidal screw rod 28 bevel gear pair 29 electric screwdriver 3 spring 31 spring box 33 Spring holding rod 34 Rod end 35 Chain 36 Adjusting nut 4 Base 51 Spring 52 Stopper pin 53 Wire

Claims (2)

(57) [Scope of request for utility model registration] An end of a link piece having one end rotatably connected to and fixed to a base portion is slidably engaged with a rail provided on the back side of the stage portion, and one end is rotatable on the stage portion. The other end of the link piece fixedly connected to the base is slidably engaged with the rail provided on the base part, and each link piece is pin-connected to the intersection, so that the stage can be raised and lowered in a pantograph style A coil spring is provided on the stage or the base, and one end of the traction member is locked to the link piece, and the traction member is engaged with the outer periphery of the guide wheel arranged at the connection fixing portion of the link piece to reverse the traction member. A lifting mechanism that is connected to a coil spring and further includes a stopper mechanism that makes a link piece immovable. 2. A pin which protrudes and is housed at the other end of a link piece slidably engaged with a rail of a stage portion or a base portion, and which is fixed to the stage portion or the base portion. 2. The lifting stage according to claim 1, wherein the stopper mechanism is formed by urging and projecting a pin into the hole.