JPH0719488Y2 - Movable floor pool - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a movable floor on the bottom of a pool, which is movable up and down, and a plurality of driving mechanisms for moving the movable floor up and down on the side wall of the pool at the periphery of the movable floor. The present invention relates to a floor pool, and particularly to the structure of a drive mechanism.

[0002]

2. Description of the Related Art Movable floor pool having a movable floor vertically movable on the bottom surface of the pool and a plurality of driving mechanisms for vertically moving the movable floor on the side wall of the pool around the movable floor. Are known (for example, Japanese Patent Publication No. 52-8).
061, JP-A-52-97236, JP-B-63-589.
94). However, for example, in Japanese Examined Patent Publication No. Sho 63-58994, the movable floor is moved up and down by using a roller chain. However, since the strength of the roller chain is weak, the roller chain may be cut by the weight of the movable floor, and thus safety is improved. I had a problem with. Further, in the movable floor pool, it has long been desired to arbitrarily set the depth position of the movable floor in order to expand its application range.

[0003]

An object of the present invention is to provide a movable-floor pool that is improved in various aspects such as high safety and the depth position of the movable floor can be arbitrarily set.

[0004]

The present invention comprises a movable floor which is vertically movable on the bottom surface of a pool, and a plurality of driving mechanisms for vertically moving the movable floor on the side wall of the pool at the periphery of the movable floor. In the movable floor type pool, one drive mechanism includes a short link chain having one end connected to the edge of the movable floor and a chain drive unit provided above the pool side wall to drive the short link chain up and down. The chain drive part has an upper sprocket, a lower sprocket, in which a short link chain is wound around in order,
And a drive sprocket, a motor for rotating the drive sprocket, an encoder for detecting the number of rotations of the motor,
And a load cell that detects a load applied to the lower sprocket, and a set of drive mechanisms that are simultaneously operated includes a control unit that simultaneously controls each chain drive unit,
The control unit is for activating the motor or activating the motor brake to stop the motor. It controls forward / reverse rotation switching and rotation speed, and also moves based on signals from the encoder. When the floor is at the desired depth position, the motor is controlled to stop, and based on the signal from the load cell, the motor is controlled to stop when the load on the lower sprocket is smaller than a predetermined value. It is characterized by that.

[0005]

The short link chain is more resistant to twisting than a roller chain, and is therefore difficult to break. Therefore,
The safety is high. In the unlikely event of a break, the operation of all the motors of a set of drive mechanisms that are operated at the same time
Since it is stopped by the control of the control unit based on the load cell, the accident is prevented from spreading and safety is further enhanced. The control unit detects the depth position of the movable floor based on the signal from the encoder, and when it is at the desired depth position, the brake of the motor is activated by the control unit and the vertical movement of the movable floor is stopped. Is maintained in that position.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the entire movable floor pool according to the present invention. Here, the movable floor 1 is divided into three substantially equal areas (1a, 1b, 1c), and each movable floor 1a, 1b,
The drive mechanism (10a, 10
b) is installed two by two. Drive mechanisms 10a and 10
It has a symmetrical structure with b. Each movable floor 1a, 1
Although b and 1c can be individually moved up and down, here, the boundary portions are connected by a removable connecting tool (not shown) so that they can be moved up and down at the same time.

FIG. 2 is a sectional view taken along line II-II of FIG. The drive mechanism 10a includes a short link chain 51 and a chain drive unit 60. One end of the short link chain 51 is connected to the edge of the movable floor 1a. The chain drive unit 60 is provided above the side wall 5a of the pool 5. 75 is a box body of a predetermined size in which the other end side of the short link chain 51 is stored. In FIG. 1, 70 is a control unit for controlling the chain drive unit 60, which includes a drive mechanism 10a for each movable floor 1a, 1b, 1c.
One is provided so as to simultaneously control the chain drive units 60 of 10b. As the control unit, one unit for controlling the chain drive units 60 of all the movable floors 1a, 1b, 1c may be provided.

3 is an enlarged vertical sectional view showing the chain drive unit 60, and FIG. 4 is a partial sectional view taken along the arrow IV in FIG. Note that FIG. 3 shows a state in which the movable floor 1a is raised to the uppermost part. The short link chain 51 connected to the movable floor 1a includes an upper sprocket 61, a lower sprocket 62, a drive sprocket 63, and idlers 64, 6
5 in this order and the rest is stored in the lower box 75 (FIG. 2). Upper sprocket 6
1 is fixed to the edge of the upper surface of the pool side wall 5a while being covered with a cover 61a. Part 161a of cover 61a
Extends slightly downward in the pool 5 to cover the short link chain 51. Reference numerals 66 and 67 are support plates fixed to the wall surface of the pool 5. The lower sprocket 62 is attached to the lower support plate 67 via the load cell 71,
The short link chain 51 wound around the load cell 71 pulls the load cell 71 upward. That is, the load cell 71 is always applied with a load of a predetermined magnitude or more, and the load cell 71 causes the control unit 70 to operate when the load becomes smaller than the predetermined magnitude because the short link chain 51 is cut. A signal for stopping the operation of the motor 68 is sent. The drive sprocket 63 is fixed to a rotary shaft of a motor 68 fixed to an upper support plate 66, and rotates with the rotation of the motor 68. The idler 64 is rotatably fixed to the support plate 66 above the support plate 66, and the idler 65 is rotatably fixed to the support plate 66 below the support plate 66.

The control unit 70 switches between forward and reverse rotation of the motor 68 by the electric current supplied to the motor 68, and controls the motor 68 to stop the rotation of the motor 68 by operating a brake. Motor 68
An encoder (not shown) is attached to the rotary shaft of. The encoder detects the number of rotations of the rotation shaft of the motor 68. The control unit 70 recognizes the depth position of the movable floor 1a based on the signal from the encoder, and activates the brake when the movable floor 1a is at a desired position. A brake works by interrupting the current to it. Further, the motor 68 changes its rotation speed when the frequency of the supplied current changes, and the control unit 70 also controls the change of this frequency. The maximum rotation speed of the motor 68 is the movable floor 1
It is set so that a can be urgently raised at a speed of about 10 m / min.

Next, the operation of the movable floor 1a will be described.
If the control unit 70 sends a current for normal rotation to the motor 68 of each chain drive unit 60, the motor 68 will move in the direction of arrow A.
The short link chain 51 is pulled up and the movable floor 1a is raised. When the movable floor 1a reaches the desired depth position, the control unit 70 cuts off the current sent to the motor 68. As a result, the brake of the motor 68 is operated, the rotation of the motor 68 is surely stopped, and the movable floor 1a is stopped and maintained at the desired depth position. When lowering the movable floor 1a, the control unit 70 may send a current for reverse rotation to the motor 68 of each chain drive unit 60. If the frequency of the current supplied to the motor 68 is changed, the rotation speed of the motor 68 changes, and the movable floor 1a
The vertical speed of changes.

In the above operation, the control unit 70 detects that the movable floor 1a has reached the desired depth position based on a signal from an encoder that detects the rotation speed of the motor 68. That is, the control unit 70 can calculate the depth position of the movable floor 1a from the rotation speed of the motor 68.

The short link chain 51 is more resistant to twisting than a roller chain, for example, and is therefore difficult to break.
Therefore, the movable floor 1a is moved in the vertical direction with high safety. Moreover, since the movable floor 1a is suspended by the four short link chains 51, it is stable in a horizontal state. Further, since the short link chain 51 is difficult to cut, there is no possibility that a plurality of short link chains will be cut at once, and even if one is cut, the remaining 3
The book keeps the movable floor 1a sufficiently stable.

When the short link chain 51 is broken during the operation or stop, the lower sprocket 62 is broken.
Becomes lower, and the load applied to the load cell 71 becomes extremely small. This change is transmitted to the control unit 70,
The current sent to the motor 68 is shut off by the control unit 70. Therefore, all the drive mechanisms 10a of the movable floor 1a,
The operation of 10b is stopped and the spread of the accident is prevented.

[0014]

As described above, according to the present invention, since the short link chain 51 which is strong against twisting is used, the safety can be improved. In addition, even if it is damaged, each movable floor 1 is controlled by the control unit 70 based on the load cell 71.
Since it is possible to stop the operation of all the motors 68 of the drive mechanisms 10a, 10b for each of a, 1b, 1c, it is possible to prevent an accident from spreading and further improve safety.

Further, the control unit 70 detects the depth position of the movable floor based on the signal from the encoder, and when it is at the desired depth position, the control unit 70 activates the brake of the motor 68 to move the movable floor. Since the up and down movement of the movable floor can be stopped and the movable floor can be maintained at that position, the movable floor can be set at an arbitrary depth position. Therefore, the depth can be set according to the age and skill of the swimmer, and the pool can be used for a wider range of purposes.

[Brief description of drawings]

FIG. 1 is a plan view showing the entire movable floor pool of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged vertical sectional view showing a chain drive unit.

FIG. 4 is a partial cross-sectional view taken along the line IV of FIG.

[Explanation of symbols]

 1 (1a, 1b, 1c) Movable floor 5a Side wall (of pool) 10a, 10b Drive mechanism 51 Short link chain 60 Chain drive unit 61 Upper sprocket 62 Lower sprocket 63 Drive sprocket 68 Motor 70 Control unit 71 Load cell

Claims (1)

[Scope of utility model registration request] 1. A movable floor pool having a movable floor movable up and down on a bottom surface of the pool, and a plurality of drive mechanisms for vertically moving the movable floor on a side wall of the pool around the movable floor. The individual drive mechanism includes a short link chain having one end connected to the edge of the movable floor, and a chain drive unit provided on the upper side of the pool side wall to drive the short link chain up and down. , An upper sprocket, a lower sprocket, and a drive sprocket on which a short link chain is sequentially wound, a motor for rotating the drive sprocket, an encoder for detecting the number of rotations of the motor, and a load cell for detecting the load applied to the lower sprocket. One set of driving mechanism that has and is operated at the same time is equipped with a control unit that controls each chain driving unit at the same time. The control unit operates the motor or operates the motor brake to stop the motor, controls the forward / reverse rotation switching and the rotation speed, and also based on the signal from the encoder. When the movable floor is at the desired depth position, the motor is controlled to stop, and based on the signal from the load cell, the motor is controlled to stop when the load on the lower sprocket is smaller than a predetermined value. A movable floor pool that is characterized by