JPH0247471A - Automatic rising and lowering device for floor equipment - Google Patents

Abstract

PURPOSE:To contrive safe and automatic opening and shutting of a floor trapdoor interlocked with ascent and descent of a floor equipment by providing a parallel linkage to the underside of a lifting base stand supporting the floor equipment and by connecting the linkage to the underside of the trapdoor. CONSTITUTION:To fixed frames 14 and 14 installed along the direction of movement of a lifting base stand 2, supporting a floor equipment, lifting links 19 and 19 are connected through connecting links consisting of at least one pair of links 17 and 18 respectively installed at the upper and the lower parts, and a parallel linkage is formed thereby. Then, the upper ends of the lifting links 19 and 19 are hinged and connected with connecting pieces 20 and 20, protrudingly installed to the underside of a swing floor trapdoor 15, and the lower ends of the links 19 and 19 fit against the upper surface of the base stand 2 and support it when the lifting base stand 2 is placed at its lowest position. Being driven by a lifting device 3, the lifting base stand 2 is raised and lowered, making the swing floor trapdoor 15 open and shut through the parallel linkage.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an automatic on-floor device that can automatically store a device used on the floor in an under-floor storage chamber immediately below it, automatically close the lid, and also automatically complete the opposite operation. This relates to a device that appears and appears.

(Prior Art) When it is desired to effectively utilize a floor surface for multiple purposes, such as on a theater stage or at home, it is advantageous to store chairs and other floor devices under the floor.

The applicant has already filed an application (Japanese Patent Application No. 62-217894) for a device that achieves this purpose.

(Purpose) When the floor device is stored in the underfloor storage section, the floor cover is automatically closed in conjunction with the lifting mechanism to provide a usable floor surface, and when the floor device is raised and installed, To provide an automatic retractable device in which a floor cover is automatically opened and held at a predetermined angle.

(Structure) The structure of the device of the present invention is an automatic ejecting and retracting device in which a floor device is moved into and out of the storage portion by an elevating drive mechanism in an underfloor storage portion formed directly below the storage portion, and a rotary floor cover is provided in the underfloor storage portion. A fixed frame is fixed along the movement direction of the lifting base supporting the floor device, and an lifting link is connected to the fixed frame through at least a pair of upper and lower connecting links to form a parallel link mechanism. The upper end of the elevating link is pivotally connected to a connection provided on the lower surface of the rotating floor cover, and the lower end of the elevating link is
The elevating base contacts and supports the upper surface of the base at its lowest position, and the side portions are configured to slide against the side portions of the chain base during the elevating and lowering operations of the elevating base.

In addition, it is effective to provide a roller at the lower end of the lifting link to reduce friction, and in order to further complete the closing action of the lid using only its own weight, the lifting link or lower connecting link is latched to the bottom surface of the base. It is a good idea to connect hook plates to each other.

The device of the present invention is not limited to one rotating lid as in the embodiment shown in the figure, but can also be used to raise and lower a single lifting base by attaching lifting links symmetrically to a pair of rotating lids that open double doors. It is also possible to open and close the door automatically at the same time.

The case where the underfloor storage item is a connected chair will be described below.

(Example) (1) is an automatic folding type connecting chair, which is mounted and fixed on a base (2). (3) is a lifting mechanism for the base, which is a cross pantograph arm connected by a pivot (6).
4) and an electric jack (5), one end (7) and (8) of the cross pantograph arm are pivoted (7a) and (8a) fixed to the lower surface of the base and the guide rail (9), respectively. The free ends (10) (11) on the other side are the rollers (12) (13), respectively.
).

The free end 11) of the vanter arm is connected to and driven by a reciprocating rod (5a) of an electric jack.

(14) is a fixed frame installed on the side wall of the underfloor storage room (B) in a position that avoids the operating range of the cross pantograph arm (4), (15) is a rotating floor cover, (16) is a hinge.

A lifting link (19) is attached to the fixed frame in parallel via a pair of connecting links (17) and (18).
Configuring a parallel linkage.

The upper end of the elevating link (19) is pivotally connected (21) to the lower surface of the floor cover via a connecting piece (20), and the lower end is provided with a guide roller (2).
2) is provided. Note that the pivot portion may be formed of a long hole.

The guide roller (22) is provided at a position where it contacts a part of the elevating base (2) or a plate member (23) fixed to the base.

(211) is a floor cover closing device that is pivotally suspended from a part of the lower connecting link (18), and has a hook plate (25) at the lower end.
) and a link (2) for preventing sliding or regulating position.
6).

The floor cover closing device (24) may be directly attached to the lifting link (19). Furthermore, the floor cover closing device (24) may be attached to a cylinder (24) as shown in Fig. 5 in order to more completely close the floor cover.
It is also possible to insert and install a compression spring 27) inside the bottom cover 28> so as to always apply a downward spring force to the closing floor cover. Note that the rotation angle of the articulating link and the relative position of the plate member and the guide roller and the side surface of the elevating link can be easily determined by design.

(Operation explanation) When the electric jack (5) is driven in the state shown in Fig. 3, the lifting mechanism 3) operates and the base (2) f! - Raise.

At the same time, the plate member (23) separates from the hook plate (25), contacts the guide roller (22), and pushes up the elevating link (19).

The floor cover (15) is rotated as the elevating link rises.

The floor cover and each of the connecting links (17) and (18) rotate at a maximum rotation angle θ=60° to 80°, respectively.

On the way, the connecting links (17) and (18) pass a horizontal point (H) and then approach the fixed frame (14), so the rollers (22) gradually move from the upper end of the plate member to its side surface (23a).
) and finally separates from the plate member.

When this state is reached, the connecting links (17) and (18) and the floor cover have reached their maximum rotation angles and are in the state shown in FIG. 4.

The base continues to rise, and the side part (23) of the plate member (23)
a > slides on the side surface (19a) of the elevating link or is guided by the transfer auxiliary wheel (19b) and rises to a predetermined position while preventing the elevating link from descending.
It will look like the figure.

When storing the chair (1) under the floor, the operation is opposite to the above, and the guide roller (22) moves to the upper end surface of the plate member (23) as the chair automatically folds and descends. From this point on, the floor cover (15) begins to close, and the lower end of the plate member abuts against the hook plate (25), completely closing and returning to the state shown in FIG. 3.

(Effects) As described below, the device of the present invention automatically raises the floor device (1), which is stored in the underfloor storage room (B) and is closed with a floor cover, to a state where it is installed on the floor, and also automatically raises this floor device. The system automatically lowers the floor cover into the storage room and closes the floor cover automatically, and since the floor cover is mechanically linked to the lifting base, it closes completely, and the safety of the closed floor cover is extremely high. ,
It is fully usable for other public facilities.

Figure 1 is a front view of the lifting mechanism seen from the back side of the chair when it is raised, Figure 2 is a side view taken along line A-A in Figure 1, and Figure 3 is
FIG. 4 is a side view of the lowered storage state, FIG. 4 is a side view of the intermediate stage, and FIG. 5 is a partially sectional view showing an example of the floor cover closing device.

(19) is a lifting link, (20) is a connecting piece, (22) is a guide roller, (23) is a plate member, (24) is a floor cover closing device, and (25) is a hook plate.

Patent applicant Cosmic Industries Co., Ltd. Agent
Patent attorney Hiroshi Nakamura

[Brief explanation of the drawing]

No. figure talent figure No. figure talent figure

Claims (1)

[Claims] In the automatic ejecting and retracting device, the on-floor device is moved into and out of the storage portion by an elevating drive mechanism in an under-floor storage portion formed directly below the storage portion, and the under-floor storage portion is provided with a rotating floor cover, an elevating base supporting the above-mentioned floor device. A fixed frame is fixed along the movement direction, and an elevating link is connected to the fixed frame via at least a pair of upper and lower connecting links to form a parallel link mechanism, and the upper end of the elevating link is connected to the rotating link. The lower end of the lift link is supported by being in contact with the upper surface of the base at the lowermost position, and the side part of the lift link is in contact with the upper surface of the base at the lowest position. An automatic ejecting and retracting device for a floor device, which is configured to come into sliding contact with the side of the base during the lifting and lowering operations.