JPH0449625B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an underfloor storage and retraction device that is installed under the floor of theaters, stages, and other various types of theaters, so that chairs or stage equipment can be retracted and the floor surface can be used widely when these are not needed. It is.

Fixed objects such as chairs and audience seats fixed to the floor,
When they are not in use, they are useless, and for this reason, the indoor space cannot be used effectively.

For example, if it is desired to open up the audience seats in a theater as a dance hall or an amusement hall, the chairs must be removed, which is practically impossible.

(Objective) The present invention comprises a storage chamber with a lid plate under the floor surface where chairs and other floor devices are installed, and the floor devices are moved up and down to obtain a stationary state and a stored state. The present invention provides a device that is automatically operated and does not apply any load to the lifting drive device when it is in a stationary state.

(Configuration) In the device of the present invention, a storage chamber is formed below the floor surface and has an opening/closing lid that serves as the floor surface, and within the storage chamber, a lifting device equipped with a lifting platform on which a floor device is mounted and a driving device is provided. In the apparatus, an overhanging arm equipped with a toggle mechanism is pivotally attached to a corner of a lower surface of the lifting table so as to be retractable, and a guide groove for guiding the overhanging arm is vertically provided on an inner wall of the storage chamber. An empty chamber having an overhanging arm support step and a colliding step for folding the arm is provided in the upper part of the holder, and a stopper for urging the overhanging arm outward is provided below the guide groove. is,
When the lifting platform is in the normal position of rising, the overhanging arm is automatically extended into the empty space and supported by the support step, and when the lifting platform is lowered, the overhanging arm is automatically folded due to the previous temporary lifting operation. The arm is moved downward along the guide groove, and at the lowered position, the extending arm is urged outward in preparation for the next rise.

(Example) The apparatus of the present invention will be explained with reference to FIGS. 1 to 6.

1 is a floor surface, 2 is a storage room provided under the floor surface, 1a is an opening/closing lid that forms part of the floor surface, 3 is an elevating device installed in the storage room, 4 is an elevating platform, and 5 is a folding device. A floor device such as a chair, 6 is a bottom plate.

The lifting device includes a pair of plate-shaped links 70A of equal length,
The center of 70B is provided with a pair of pantograph mechanisms 7 which are pivoted to both ends of a pivot shaft 8 to form an X shape.

One end 7a, 7b of the link constituting the pantograph mechanism is pivotally attached 71, 72 to the bottom plate 6 and the lower surface 4a of the lifting platform 4, respectively, and the other end, that is, the free end 9a, 9
b is equipped with rollers 73 and 74 that roll along the lower surface of the lifting platform and the inner surface of the bottom plate, respectively.

Arc-shaped guide surfaces 10 and 1 that bulge out opposite each other on the inner surfaces of the free ends of the equal-length links 70A and 70B.
1 is formed.

15 is a drive device for the pantograph mechanism 7, and a linear actuator such as an electric cylinder or a screw screw is used.

The drive 15 is supported horizontally between the pantograph pairs, ie on the intermediate mounting 16 of the pivot 8.

Reference numeral 15a denotes a reciprocating rod, and a roller support shaft 14 that is perpendicular to the horizontal plane is connected to the tip 17 of the rod.

12 and 13 are wedge rollers rotatably mounted on a roller support shaft, the roller 12 corresponding to the guide surface 10 and the roller 13 corresponding to the guide surface 1.
It is located corresponding to 1.

As the rod 15a advances and retreats, the roller 1
2 and 13 are in contact with each other so as to be inserted between both arcuate guide surfaces, and rotate in opposite directions to extend and contract the pantograph mechanism, thereby raising and lowering the platform.

Note that the seventh drive means for the pantograph mechanism is
As shown in the figure, two screw screws 15 may be arranged in parallel, and chains 32 and 33 may be connected using a motor 31 as a driving source.

Guide grooves 26 for the overhanging arms 19 for receiving the load of the lifting platform 4 are provided vertically on the inner walls of the four corners of the accommodation chamber 2, and overhanging cavities 27 for overhanging the overhanging arms are provided on the outside of the upper part of each guide groove. is provided.

Reference numeral 28 represents an arm support step, and 29 represents a collision step for bending the arm.

The overhanging arm 19 is attached to a mounting plate 1 vertically fixed to the lower surface of the lifting platform so as to correspond to the guide groove 26.
8 by a pivot pin 20, one end is fixed 22 to a mounting plate, and the other end is attached 23 to the arm itself by a tension spring 21 to form a toggle mechanism.

24 and 25 are arm stops.

(Function) When the pantograph mechanism 7 is folded and the elevator platform 4 is in the accommodation chamber, the opening/closing lid 1a constitutes a floor surface as shown in FIG. 6.

When the drive device 15 is driven and the pantograph mechanism is extended, the lifting platform 4 is raised, and the floor device 5 is pushed up to open the opening/closing lid 1a.

During the rising process, the overhanging arm 19 is always urged outward, and its tip side is in the guide groove 26.
rise along the

In Figure 1, roller 74 is the limit switch.
When it comes into contact with LS3, the drive device 15 is temporarily stopped,
The lifting platform 4 stops at the position LS3 in FIG. 5. In this position, the overhanging arm 19 overhangs into the empty space 27 by the action of a spring.

Immediately thereafter, a reversing circuit (not shown) of the drive device 15 is formed, and the rod 15a is extended, so that the lifting platform 4 is lowered.

The arm 19 protruding into the empty space is a support step 28
It is supported above and is locked to the stopper 24 to receive the entire load on the lifting platform.

At the same time, the wedge roller 12 or 13 contacts the limit switch LS2, and the drive device stops.

In this stopped state, as shown in FIG. 1, the wedge rollers 12 and 13 are not in contact with the guide surfaces 10 and 11, and therefore no external force is applied to either the rollers or the drive device.

In the next lowering step, the drive device 15 is once driven in the upward direction.

This allows the overhang arm 19 to move to the collision step 29.
As a result, the spring 21 is positioned on the opposite side beyond the pivot pin 20, so that the extending arm is always biased inward.

When the roller 74 contacts the limit switch LS4, the rod 15a of the drive device 15 is driven in the extending direction, and the roller 74 contacts the limit switch LS1 and stops.

Immediately before this, the downward extending arm 19 comes into contact with the stopper 30, and is thereby reversed and is then urged to rotate outward, returning to the state shown by the dashed line in FIG.

In this state, the floor device 5 on the lifting platform 4
is stored in the storage chamber as shown in FIG. 6, and the opening/closing lid 1a is closed to form the floor surface again.

(Effects) In the device of the present invention, when the lifting platform is raised to the fixed position, the extending arm automatically extends and takes the load of the entire device, so there is no load on the lifting device including the pantograph mechanism and the drive device, and therefore there is no possibility of failure. It is free and safe.

Therefore, it is particularly effective when the drive device is electric.

Further, when descending, the elevating table 4 is once slightly raised, and the extending arm is automatically folded and lowered to house the floor device in the storage chamber.

As a result, a flat floor surface can be ensured except when floor equipment is required, and the floor surface can be used as a court for various sports, a dance hall, or the like.

[Brief explanation of the drawing]

Fig. 1 is a front view of the device according to the embodiment of the present invention, Fig. 2 is a plan view with the lifting platform removed, Fig. 3 is a partially vertical side view of Fig. 1, and Fig. 4 shows the extended state of the extended arm. FIG. 5 is a partial side view showing the changing state of the extending arm when stored, FIG. 6 is a diagram showing the storage state of the floor device, and FIG. 7 is a plan view showing another embodiment of the lifting device. .

Claims (1)

[Claims] 1. In an apparatus in which a storage chamber having an opening/closing lid serving as a floor surface is formed below the floor surface, and a lifting platform with a floor device placed thereon and a lifting device equipped with a drive device is provided in the storage chamber, the lifting platform is An overhang arm equipped with a toggle mechanism is pivotally attached to a corner of the lower surface so as to be retractable, and a guide groove for guiding the overhang arm is vertically provided on the inner wall of the storage chamber, and an overhang arm support is provided above the guide groove. An underfloor storage/extrusion device for a floor-mounted device, comprising: a vacant chamber having a step and a colliding step for folding the arm, and further provided below the guide groove a stopper for urging the extending arm outward. .