JPH11247475A - Pool floor elevating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pool floor elevating device which is compact and low in the cost. SOLUTION: A plurality of pairs of vertical grooves are provided on the left and right walls 1a of a pool 1, and a plurality of pairs of projecting parts 6 inserted into the respective vertical grooves 3 are provided on the left and right edge parts of a elevatable pool floor 2. Fixed sprockets 11, 18, 14, 15 are respectively provided on the upper and lower end parts of the respective vertical grooves 3, and upper and lower a pair of elevatable sprockets 12, 17, 13, 16 are respectively provided on the respective projecting parts 6. The rotary shafts of the right lower fixed sprockets 15 are connected together, and they are driven by one drive device 8. A chain 19 is laid on the left upper fixed sprocket 11, the left upper elevatable sprocket 12, the right upper elevatable sprocket 13, the right upper fixed sprocket 14, the right lower fixed sprocket 15, the right lower elevatable sprocket 16, the left lower elevatable sprocket 17, and the left lower fixed sprocket 18 in these order. The rotary shafts of the left and right sprockets 12, 17, 13, 16 are connected together so as to synchronize with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pool floor raising / lowering device used in a pool capable of raising and lowering the floor of a pool to change its depth.

[0002]

2. Description of the Related Art Conventionally, as a pool floor elevating device, a plurality of pairs of vertical grooves are provided on the left and right wall surfaces of the pool at predetermined intervals in front and rear, and upper and lower ends of each vertical groove are provided with a rotating shaft in the front and rear direction. The upper and lower sprockets are provided with sprockets, and both ends of the elevating chain are fixed to left and right protrusions provided on the pool floor, and are arranged in front of and behind the rotation axes of the left and right lower sprockets. It is known that they are connected to each other and driven by left and right driving devices, respectively.

[0003]

In the above-mentioned conventional pool floor elevating device, since the left and right drive shafts are driven by separate drive devices, a control device for synchronizing the left and right drive devices is required. However, there has been a problem that the entire apparatus becomes large and the cost is high.

[0004] It is an object of the present invention to provide a pool floor elevating apparatus in which the apparatus is compact and inexpensive.

[0005]

SUMMARY OF THE INVENTION A pool floor elevating device according to the present invention is provided with a plurality of pairs of vertical grooves provided at predetermined intervals in the front and rear walls on the left and right wall surfaces of the pool. On the lower surface of the left and right edges, a plurality of pairs of left and right protrusions respectively inserted into the respective vertical grooves are provided, and at the upper and lower ends of each vertical groove, fixed sprockets having a rotation axis in the front and rear direction are provided on each of the left and right protrusions. A pair of upper and lower elevating sprockets each having a rotation axis in the front-rear direction are provided, and one of the left and right lower fixed sprockets is connected to each other in front and rear, and is driven by one driving device. And the other upper fixed sprocket, the other upper elevating sprocket, the one upper elevating sprocket, the one upper fixed sprocket, the one lower A chain is hung on the fixed sprocket, the one lower elevating sprocket, the other lower elevating sprocket, and the other lower fixed sprocket in this order, and the right and left elevating sprockets are connected so that their rotation axes are synchronized with each other. It is.

In this specification, the left and right refer to the left and right in FIG. 2, and the front and rear are referred to as the front and the rear in the drawing.

According to the pool floor elevating device of the present invention, by operating the driving device, all the rotating shafts connected to the driving device rotate in synchronization. Along with this, each sprocket rotates, and the chain moves in a direction to move the elevating sprocket upward or downward. Therefore,
Each elevating sprocket is raised or lowered by the same amount as the movement of the chain, and the pool floor is raised and lowered. In this way, the pool floor can be raised and lowered with one driving device, so that the device is compact and the cost is low.

A tuning mechanism for connecting the rotating shafts of the left and right elevating sprockets so as to be synchronized with each other comprises an upper horizontal traveling portion of the chain between the upper left elevating sprocket and the upper right elevating sprocket, and a lower left elevating sprocket and the right. Left and right sprockets meshed with the lower horizontal traveling portion of the chain between the lower elevating sprocket, and left and right bevel gears provided on each sprocket shaft,
It is preferable that a bevel gear meshed with these bevel gears is provided on the left and right ends, and a tuning shaft rotatably supported on the lower surface of the pool floor. In this way, the right and left elevating sprockets can be synchronized with a simple configuration.

At least one fixed buoyancy tank filled with Styrofoam and at least one variable buoyancy tank normally filled with air when water rises up the pool floor are further provided on the lower surface of the pool floor. preferable. In this way, the burden on the drive device when raising and lowering the pool floor is reduced, and the drive device can be made compact and low in cost.

[0010]

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

As shown in FIG. 1, the pool floor elevating device according to the present invention comprises three lifting chain devices (7) provided at predetermined intervals in front and rear on the lower surface of a pool floor (2) which can be raised and lowered.
And one driving device (8) for simultaneously driving the three chain devices (7).

The left and right wall surfaces (1a) of the pool (1) are provided with a total of three pairs of vertical grooves (3) extending from near the upper end to the lower end thereof at predetermined intervals in the front and rear directions.

On the lower surface of the pool floor (2), there are provided a total of four H-shaped frames (4) extending back and forth, and a total of three pairs of parallel frames (5) orthogonal to these. Parallel frame
(5) is composed of two vertical plates extending left and right, and the left and right ends (6) protrude outward from the pool floor (2) and are inserted into the respective vertical grooves (3).

Each of the chain devices (7) includes a front and rear fixed rotating shaft (11a) (18a) (14a) (15a) rotatably supported at the upper and lower ends of each vertical groove (3). Fixed rotation axis (1
1a) (18a) (14a) (15a) Rotatably supported by fixed sprockets (11), (18), (14), and (15), respectively, and the left and right ends (6) of the parallel frame (5) Pair of upper and lower rotating shafts (12a) (17a) (13a) (16a) in the front-rear direction, and lifting sprockets respectively attached to these rotating shafts (12a) (17a) (13a) (16a) (12) (17) (13) (16) and the chain (19) hung on these sprockets (11) (12) (13) (14) (15) (16) (17) (18) , Left and right lifting sprockets (12) (17)
(13) A tuning mechanism (20) for synchronizing the components (14) is provided.

Each sprocket (11) (12) (13) (14) (15) (16)
(17) and (18) are the same size, and each elevating rotary shaft (12a) (17
a) (13a) (16a) are fixed rotation shafts (1
1a), (18a), (14a), and (15a).

After one end of the chain (19) is fixed to the bottom wall of the left vertical groove (3) below the upper left fixed sprocket (11), the chain (19) is located above the upper left fixed sprocket (11) and upper left. The lower side of the elevating sprocket (12), the lower side of the upper right elevating sprocket (13), the upper side of the upper right fixed sprocket (14),
In this order, it was hung below the lower right fixed sprocket (15), above the lower right elevating sprocket (16), above the lower left elevating sprocket (17), and below the lower left fixed sprocket (18). The other end is fixed to the bottom wall of the left vertical groove (3) above the lower left fixed sprocket (18).

As shown in FIG. 2, the upper horizontal traveling portion (19a) of the chain (19) between the upper left elevating sprocket (12) and the upper right elevating sprocket (13) has the pool floor at the lower limit position. The part excluding the right end part at one time is replaced by a rod (21), and the lower horizontal traveling part (19b) of the chain (19) between the lower left elevating sprocket (17) and the lower right elevating sprocket (16) In (), the portion excluding the left end portion when the pool floor is at the lower limit position is replaced with a rod (21).

The tuning mechanism (20) includes a pair of left and right sprockets (22) meshed with left and right ends of an upper horizontal traveling portion (19a) of the chain (19) and left and right ends of a lower horizontal traveling portion (19b). ), A bevel gear (23) provided at the rear end of each sprocket shaft (22a), and a bevel gear of each sprocket shaft (22a).
Left and right tuning shafts (25) having bevel gears (24) at both left and right ends respectively engaged with (23) and rotatably supported on the rear surface of the parallel frame (5) via bearings (26). And

As shown in FIG. 1, fixed rotary shafts (15a) provided at the lower end of the right vertical groove (3) are connected to each other in front and rear, as shown in FIG. This connection (27) is located outside the pool (1) and in the vertical groove (3) in the fixed rotary shaft (15).
A seal (28) is provided between a) and the connecting portion (27).

The driving device (8) includes a lower right fixed rotating shaft (15a).
Can be driven in both left and right directions and has a brake for preventing rotation at an arbitrary position, and is disposed outside the pool (1) like the rotating shaft connecting portion (27).

Each parallel frame is provided on the lower surface of the pool floor (2).
Buoyancy tanks (29) and (30) are provided in contact with the front surface of (5). Of the three buoyancy tanks (29) and (30), the front and rear ones (29) are fixed buoyancy tanks, that is, tanks filled with Styrofoam,
(30) is a fluctuating buoyancy tank, that is, a tank filled with air when ascending and filled with water otherwise.
As shown in FIG. 5, the variable buoyancy tank (30) is provided with an air pipe (32) for introducing and discharging air, and a water pipe (33) for introducing and discharging water. ing. The water pipe (33) is connected to the inlet pipe (34) and the discharge pipe (35) for circulating the pool water through three-way valves (36) and (37), respectively, and the variable buoyancy tank (30) Water is introduced into and discharged from the pool by a pool water circulation pump (31). The water in the pool (1) is usually drained as shown by the solid line in the figure.
(35), circulated by a pump (31) and an inlet pipe (34). When the pool floor (2) rises, the three-way valves (36) and (37) are switched, and the floating buoyancy tank is
The water filled in (30) is discharged into the pool (1) by the water pipe (33), the drain pipe for pool water circulation (35), the pump (31) and the inlet pipe (34), Filling air is introduced into the variable buoyancy tank (30) by the air pipe (32).
When the rise of the pool floor (2) is completed, the three-way valves (36) and (37) are switched, and as shown by the dashed line in the figure, the discharge pipe for pool water circulation (35), the pump (31), and the introduction pipe ( 34) and water piping
The water is filled into the variable buoyancy tank (30) by (33), and the air in the variable buoyancy tank (30) is discharged by the air pipe (32). The number of tanks (29) and (30) can be changed as appropriate, and the numbers of fixed buoyancy tanks and variable buoyancy tanks can be changed as appropriate, including that all tanks are fixed or variable. is there.

The raising and lowering of the pool floor (2) by the pool floor raising / lowering device of the present invention is performed as follows.

First, the variable buoyancy tank (30) is filled with air. Next, the drive unit (8) is operated to rotate the fixed rotation shaft (15a) at the lower right of each chain device (7) clockwise. As a result, all the chain devices (7) arranged in front and back move synchronously, and in each chain device (7), each fixed sprocket (11) (14) (15) (18) rotates clockwise, and each lifting sprocket ( 12) (13) (16) (17) rotate counterclockwise. Therefore,
The upper horizontal traveling part (19a) of the chain (19)
(19) The lower horizontal traveling part (19b) moves to the left, and the upper right elevating sprocket (13) and the upper right fixed sprocket (14)
And the lower vertical run of the chain (19) between the lower right fixed sprocket (15) and the lower right elevating sprocket (16). (19
d) both move upward. At this time, the tuning mechanism (20)
Since the bevel gear (23) provided on the sprocket shaft (22a) and the bevel gears (24) at both left and right ends of the tuning shaft (25) are meshed with each other, each of the elevating sprockets (12) (13) ( 16) (1
7) rotates by the same amount, each running part (19a) of the chain (19)
(19b), (19c) and (19d) move by the same amount. This allows
Each elevating sprocket (1
2) (13), (16) and (17) rise together, and the pool floor (2) rises accordingly. Here, the pool floor (2) stops at an arbitrary position by filling the variable buoyancy tank (30) with water and operating the brake of the driving device (8). Conversely, when the lower right fixed rotation shaft (15a) is rotated counterclockwise, the pool floor (2) is lowered.

In the above case, when there is no tuning mechanism (20), as shown in FIG. 7, when the lower right fixed rotating shaft (15a) is rotated clockwise, the upper right elevating sprocket (13)
Is rotated about the upper left elevating sprocket (12) by the upward force from the upper vertical traveling part (19c) of the chain (19), and as shown by the two-dot chain line in FIG. Since the frame (5) tries to rotate clockwise, it is difficult to move up and down smoothly.

The tuning mechanism is not limited to the one using bevel gears (23) and (24), and an example is shown in FIG. The tuning mechanism (40) shown in the figure is provided at the rear end of the rotating shaft (22a) of each of the right and left sprockets (22) of the tuning mechanism shown in FIG.
Instead of bevel gears (23) and (24), separate left and right sprockets (4
1), and an endless chain (42) is wound around these left and right sprockets (41). Even with such a configuration, smooth lifting and lowering of the pool floor (2) is ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a pool floor elevating device according to the present invention.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is an enlarged cross-sectional view showing a left-right tuning mechanism.

FIG. 4 is a horizontal sectional view of the same.

FIG. 5 is a circuit diagram showing a lifting assist device.

FIG. 6 is an enlarged horizontal sectional view showing another embodiment of the left-right tuning mechanism.

FIG. 7 is a cross-sectional view showing a problem when there is no left-right tuning mechanism.

[Explanation of symbols]

 (1) Pool (1a) Left and right walls (2) Pool floor (3) Vertical groove (5) Parallel frame (6) Left and right end (projection) (7) Elevating chain unit (8) Drive unit (11) ( 14) (15) (18) Fixed sprocket (11a) (14a) (15a) (18a) Fixed rotating shaft (12) (13) (16) (17) Elevating sprocket (12a) (13a) (16a) (17a) ) Elevating rotating shaft (19) Chain (20) Tuning mechanism (22) Sprocket (22a) Rotating shaft (23) (24) Bevel gear (25) Tuning shaft (29) Fixed buoyancy tank (30) Variable buoyancy tank

Claims (3)

[Claims] A left and right wall surface (1a) of a pool (1) is provided with a plurality of pairs of vertical grooves (3) at predetermined intervals in front and rear, and is provided on the lower surface of a left and right edge of a vertically movable pool floor (2). A plurality of pairs of left and right protrusions (6) inserted into each of the vertical grooves (3),
At the upper and lower ends of each vertical groove (3), the rotating shaft (11a) (18
a) Fixed sprocket with (14a) (15a) (11) (18) (14) (1
5) is attached to each of the left and right protrusions (6).
a) A pair of upper and lower lifting sprockets (12) having (13a) and (16a)
(17), (13) and (16) are provided, and one of the right and left lower fixed sprockets (15) whose rotating shafts (15a) are arranged back and forth are connected to each other and driven by one driving device (8). The other upper fixed sprocket (11) and the other upper lifting sprocket (1)
2), the one upper elevating sprocket (13), the one upper fixed sprocket (14), the one lower fixed sprocket (15), the one lower elevating sprocket (16), and the other lower elevating sprocket ( 17) and the other lower fixed sprocket (18) are chained in this order with a chain (19), and rotating shafts (12a) (13a) (17a) of left and right elevating sprockets (12) (17) (13) (16). (16) A pool floor elevating device in which (16a) are connected so as to be synchronized with each other. 2. Left and right lifting sprockets (12) (17) (13) (1)
A tuning mechanism (20) for connecting the rotating shafts (12a) (13a) (17a) (16a) of the (6) so as to synchronize with each other is provided by an upper left elevating sprocket (12) and an upper right elevating sprocket (13). The upper horizontal running part (19a) of the interposed chain (19) and the lower horizontal running part (19b) of the chain (19) between the lower left elevating sprocket (17) and the lower right elevating sprocket (16) Left and right sprockets (22) meshed together with each sprocket shaft
(22a) have left and right bevel gears (23), and bevel gears (24) meshed with these bevel gears (23) at left and right ends, and are rotatable on the lower surface of the pool floor (2). The pool floor elevating device according to claim 1, comprising a supported tuning shaft (25). 3. At least one fixed buoyancy tank filled with Styrofoam and water is usually supplied to the pool floor (2).
3. The pool floor elevating device according to claim 1, wherein at least one variable buoyancy tank filled with air at the time of ascent is further provided on a lower surface of the pool floor.