JPH06343773A - Lifting table holding mechanism - Google Patents

Abstract

PURPOSE:To hold a lifting table automatically at an elevated position by a lifting table holding mechanism comprising an upper and a lower member pivotally joined to the lifting table and a fixed table, a control means for controlling the turning of the upper and the lower member in one direction, and a joint moving means for horizontally moving the joint of the upper and the lower member. CONSTITUTION:When a lifting table 3 is elevated by a lifting means, a joint pin 5a is positioned at a small distance from a vertical line V on the side opposite the side of a stopper bracket 10 with respect to the vertical line V. Then, the operating rod of a cylinder actuator 12 is retracted to turn a lower member 4 clockwise to shift the joint pin 5a to the other side; consequently, an upper member 11 is displaced by a small distance beta and the side surface 1a of the upper member 1 comes into contact with the stopper bracket 10 to hold the members 1 and 4 in positions slightly tilted toward the stopper bracket 10. The lifting table 3 is held at the elevated position even if load L is exerted on the lifting table 3 because the stopper bracket 10 and the members 1 and 4 bear the load L. The cylinder actuator 12 need not apply any force to the lower member 4, which saves power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting floor holding device for a lifting pool, for example.

[0002]

2. Description of the Related Art The lifting floor of a lifting pool is lifted by a lifting means such as a cylinder or a chain to set the water depth according to various types of underwater sports having different water depths.

This elevating type pool is used not only for underwater sports, but also for elevating the elevating floor to the upper surface of the pool to be used as a stadium for land sports.

[0004]

When the lifting floor is used in a raised state as described above, the lifting means is designed and manufactured from the economical point of view based on the underwater weight of the lifting floor. Therefore, in order to raise the lifting floor and use it as a stadium or the like, a large number of columns are provided between the lifting floor and the fixed floor below each time. However, it is necessary to attach and detach a large number of these columns, resulting in large man-hour and time loss.

An object of the present invention is to provide a lifting floor holding device for automatically holding a lifting floor in a raised position.

[0006]

According to the present invention, an upper member having an upper end pivotally attached to a lifting floor, and an upper end bendably connected to a lower end of the upper member and a lower end pivotally attached to a fixed floor. A lower member, a refraction control means for limiting only one direction of refraction of the both members, and a connecting portion moving means for horizontally moving the connecting portion of both members are provided.

[0007] It is preferable that the pivoting portion of the upper member of the rising floor and the pivoting portion of the lower member of the fixed bed are provided on the same vertical line.

Further, the refraction restricting means is provided on a raised floor or a fixed floor so as to project, and a stopper bracket for locking the upper member or the lower member at a position where the pivotal portion slightly exceeds the vertical line, or the upper member or the lower member. It is preferably composed of a stopper bracket provided on the member.

Further, it is preferable that the connecting portion moving means is composed of a cylinder or a spring interposed between a fixed floor or an elevating floor and a lower member or an upper member, and a cylinder having a reverse biasing force to the spring.

[0010]

In the lifting floor holding device configured as described above, when the lifting floor is raised to the uppermost position and the cylinder is contracted to move the connecting point to the opposite side of the vertical line, the upper member or the lower member is moved. Is locked to the stopper bracket.
Therefore, when a load is applied to the lifting floor in this state, the load is supported by the stopper bracket and both members, and the lifting floor is automatically held in the raised position.

Further, the cylinder is extended to move the connecting portion to the side opposite to the vertical line, and the elevating means lowers the elevating floor.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a state in which the lifting floor 3 is below the water surface W of the pool P. The lift floor 3 is lifted and lowered by a lifting means such as a cylinder or a chain (not shown), and is guided by a roller 8 to the pool wall surface 9.

Between the lifting floor 3 and the fixed floor 7, a bendable upper member 1 and lower member 4 are interposed. A stopper bracket 10, which is a refraction control means, projects from the lower surface of the lift floor 3, and a connecting portion moving means is provided between the lower member 4 and the cylinder bracket 11 that is erected on the fixed floor 7. The cylinder 12 is interposed.

2 and 3, a pedestal 3a is provided on the lower surface of the lifting floor 3, and the pin 2 is attached to the pedestal 3a.
The upper end of the upper member 1 is pivotally attached by a, a bearing 2b, and a pair of thrust collars 2c.

The fixed floor 7 has a base 7a and a base 3a.
Is erected on the same vertical line V as the
The lower end of the lower member 4 is pivotally attached by a, a bearing 6b, and a pair of thrust collars 6c. And the upper member 1
The lower end of the lower member 4 and the upper end of the lower member 4 are connected by a connecting pin 5a, a bearing 5b, and a pair of thrust collars 5c. When the lift floor 3 is raised to the highest position,
The connecting pin 5a is positioned on the one side (the left side in the illustrated example) by a small amount δ with respect to the vertical line V.

On the other hand, on the lower surface of the lifting floor 3, a stopper bracket 10 is provided so as to project on one side of the vertical line V (right side in the illustrated example). Further, a cylinder bracket 11 is provided so as to project on the same side of the fixed floor 7 as the stopper bracket 10, and between the bracket 11 and the lower member 4,
The cylinder 12 is interposed via the pins 13 and 14.

Next, the operation will be described.

When the elevating floor 3 is lifted by the elevating means from the position shown in FIG. 1 to the position shown in FIG.

Therefore, as shown in FIG. 4, the cylinder 12
And lower member 4 is rotated clockwise to connect pin 5
When a is moved to the opposite side of the vertical line V, the side surface 1a of the upper member 1 is locked to the stopper bracket 10 with a minute movement amount β, and both members 1 and 4 are slightly bent toward the stopper bracket 10 side. Retained. Since the minute amount α and the minute movement amount β are extremely small with respect to the lengths of both members 1 and 4, they are absorbed by the relative vertical displacement of the connecting pin 5a and the bearing 5b.

In the state shown in FIG. 4, even if the load L acts on the lifting floor 3, the load L is supported by the stopper bracket 10 and both members 1 and 4, and the lifting floor 3 is held in the raised position. . Further, in this state, the axial force of the cylinder 12 is unnecessary, so the power is saved.

On the other hand, in order to lower the lifting floor 3 from the raised state, the cylinder 12 is extended, the connecting pin 5a is moved to the position shown in FIG. 2, and then the lifting means lowers it.

FIG. 5 shows another embodiment of the connecting portion moving means, which is stretched between the spring bracket 15 standing on the fixed floor 7 and the lower member 4 via pins 17 and 18. This is an example constituted by a coil spring 16 and a cylinder 19 fixed to the spring bracket 15. In this embodiment, the connecting pin 5a is moved from the position of FIG. 5 to the position of FIG. 6 by the pulling force F1 of the coil spring 16.
The connecting pin 5a is moved from the position of FIG. 6 to the position of FIG. 5 by the pressing force F2 (F2> F1) of the piston rod 20 due to the extension of the cylinder 19.

[0024]

Since the present invention is configured as described above, the load applied to the lifting floor in the raised position is supported by the stopper bracket and the upper and lower members to automatically move the raised floor to the raised position. Can be retained.

Therefore, it is possible to omit the work of attaching and detaching the columns between the lifting floor and the fixed floor as in the conventional case, and it is possible to save the man-hours and time.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

FIG. 2 is a front view showing a state before movement of the connecting pin according to the embodiment of the present invention.

3 is a sectional view taken along the line ABC of FIG.

FIG. 4 is a front view showing a state after the connecting pin of FIG. 2 is moved.

5 is a drawing corresponding to FIG. 2, showing another embodiment of the connecting portion moving means.

6 is a drawing corresponding to FIG. 4 of the means of FIG. 5;

[Explanation of symbols]

 L load P pool V vertical line W water surface 1 upper member 2a, 6a, 13, 14, 17, 18 pin 2b, 5b, 6b bearing 2c, 5c, 6c thrust collar 3 lifting floor 3a, 7a pedestal 4 lower member 5a connecting pin 7 Fixed Floor 8 Roller 9 Pool Wall 10 Stopper Bracket 11 Cylinder Bracket 12, 19 Cylinder 15 Spring Bracket 16 Coil Spring 20 Piston Rod

Claims (1)

[Claims] 1. An upper member having an upper end pivotally attached to a lift floor,
A lower member whose upper end is flexibly connected to the lower end of the upper member and whose lower end is pivotally attached to a fixed floor; refraction control means for limiting only one direction of refraction of both members; and a connecting portion of both members. An elevator floor holding device, characterized in that it is provided with a connecting portion moving means for moving in a horizontal direction.