JPH04368572A - Mid floor lifting gear of swimming pool - Google Patents

Abstract

PURPOSE:To reduce the tensile durability in a wire rope locking device locking a mid floor with a wire rope at the time of locking this mid floor, in a mid floor lifting gear of a swimming pool. CONSTITUTION:Plural vertical grooves 5 are installed in a pool side, while each pair of sprockets and pulleys 13 is installed in a turning shaft 11 at both up and down ends of each vertical groove 5. A chain is stretched across these paired sprockets and a wire rope 15 across these paired pulleys 13, respectively. The chain and the wire rope 15 are attached tight to an arm member 10 of a mid floor, driving the chain and lifting this mid floor up or down, and the wire rope 15 is driven. In a mid floor lifting gear 6 which is locked by a wire rope locking device 26 during a standstill of the mid floor 3, and holds this mid floor 3, the wire rope 15 lifting the mid floor 3 is wound a roll and half on the pulley 13 at the upper end by turning it at the bottom side of the pulley groove. The pulley groove is of a V-shaped type of a round bottom more or less larger than a diameter D of the wire rope and depth H of this pulley groove goes beyond two times over the diameter of the wire rope, while width of the pulley groove is made so as to exceed two times over the diameter of the wire rope at a wide width part W.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermediate floor lifting device for adjusting the water depth of a swimming pool, and more particularly to a lifting device suitable for a suspended floor system using wire ropes.

0002

[Prior Art] It is desirable to adjust the water depth of a pool according to the height and purpose of the users (rehabilitation, golf swing practice, etc.). There is a difference in height, so it is necessary to adjust the water depth according to the age. For this reason, in recent years, the middle floor that goes up and down is submerged in the pool, and the four corners of the middle floor are driven by a motor using chains or wire ropes, etc. to move the middle floor up and down while keeping it horizontal, thereby increasing the water depth. A large-scale adjustable floor lifting device is used.

0003

[Problems to be Solved by the Invention] Using a chain to raise and lower the middle floor in the above method only requires controlling the rotation of the sprocket that moves the chain up and down. Although it is easy to adjust, the tensile strength of the chain cannot be sustained by the load on the middle floor when water is drained, and a support device such as a jack mechanism is required under the middle floor.

[0004] Also, wire rollers are used to raise and lower the middle floor.
Using ropes can withstand tensile loads better than chains, so even if the water is drained, they can still support the load on the middle floor. However, when each drum around which the wire rope is wound is rotated to send out the wire rope and move the floor up and down, there is a drawback that it is difficult to finely adjust the up and down of the middle floor just by controlling the rotation of the drums. there were. SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a device that uses a chain and a wire rope to raise and lower an intermediate floor using a simpler mechanism.

[0005]

[Means for solving the problem] An intermediate floor is arranged horizontally in the pool, a plurality of vertical grooves are provided in the pool side wall surface, and a lifting device is provided in each vertical groove to raise and lower the intermediate floor. A pair of sprockets and pulleys are installed on horizontal rotation shafts at the upper and lower ends of each vertical groove of the wheel, a chain is passed through the pair of sprockets, and a wire rope is connected to the pair of pulleys. across,
The chain and wire rope are fixed to the arm members of the intermediate floor that protrude into the vertical groove, and the drive sprocket that engages with the chain is rotated by the prime mover to drive the chain and move the intermediate floor. The wire rope follows the rise and fall of the middle floor.
When the middle floor is stationary, the wire rope is fixed by a wire rope fixing device.
In a swimming pool mid-floor lifting device that fixes a rope and holds the mid-floor, the wire rope that hangs the mid-floor is wrapped around the bottom of the pulley groove at the pulley at the top end of each groove. The pulley groove is V-shaped with a round bottom slightly larger than the diameter of the wire rope, and the depth of the pulley groove is the same as that of the wire rope.
This device is used as a mid-floor lifting device for a swimming pool in which the mid-floor is suspended by a pulley that is more than twice the diameter of the wire rope and the width of the pulley groove is more than twice the diameter of the wire rope at the wide part.

[0006]

[Embodiment] To explain one embodiment of the present invention, FIG. 1 shows a perspective view of a swimming pool provided with an intermediate floor that can be raised and lowered. Inside, an intermediate floor 3, which is slightly smaller than the floor surface 2, is arranged horizontally. A vertical groove 5 having a rectangular horizontal cross section is provided in the pool wall surface at both corners of both sides of the pool side 4, and the height of the vertical groove 5 reaches from the floor surface 2 to the pool side 4. Lifting devices 6 are provided inside, and the middle floor 3 is raised and lowered by the lifting devices 6 at four locations.

The middle floor 3 is composed of a frame 7 and a deck 8. The frame 7 is made of preservative-treated steel and has a rectangular shape on the outside, and a lattice-like interior with reinforcing steel installed diagonally in the lattice portion and further reinforced diagonally to prevent the floor surface 3 from sagging. It is made to be strong. Rollers 9 that rotate in the vertical direction are installed at various locations on the outer frame of the frame.
is in contact with the pool wall surface so that it can be smoothly raised and lowered when the middle floor 3 is raised and lowered. The deck 8 is fixedly arranged on the frame in the form of a drainboard to allow the water in the pool to circulate up and down, so that the middle floor 3 can be smoothly raised and lowered underwater. The material of the deck 8 is synthetic resin, and the inside is hollow or filled with foam material, so that the deck 8 generates buoyancy underwater, reducing the weight of the middle floor 3 including the frame 7 in the water, and reducing the weight of the middle floor 3, including the frame 7. The specific gravity is set to be slightly larger than 1, so that the middle bed 3 is submerged in water. A part of the deck 8 is provided with an inspection port (not shown) that can be opened and closed, so that daily inspections and equipment for cleaning the pool floor can be taken in and out.

A projecting arm 10 that projects horizontally into the vertical groove 5 is fixed to a portion of the frame outer frame of the intermediate floor 3 corresponding to the vertical groove 5, and is attached to a lifting device 6 within the vertical groove. Therefore, the intermediate floor 3 is raised and lowered by the lifting device 6 provided in the vertical groove 5 by projecting arms 10 attached to the four sides of the frame 7.

FIG. 2 shows a cross section of a pool including vertical grooves.
The middle floor 3, which is filled with water and is underwater, is lifted and lowered by a lifting device 6 in a vertical groove provided with a projecting arm 10 fixed to a frame 7 on the pool wall surface. Lifting device 6
A spindle 11 is provided in parallel above and below the vertical groove 5, and a sprocket 12 and a pulley 13 are attached to the spindle 11, and the sprocket 12 and pulley 13 are rotatable independently. . A chain 14 shown by a chain line is stretched between the upper and lower sprockets 12, 12, and the tip of the protruding arm 10 of the frame on the middle floor is seated and fixed on the pool side of the chain 14. has been done. Here, the chain 14 only needs to have enough tensile strength to raise and lower the middle bed 3 underwater. This is because, in the present invention, the drive by the chain 14 only raises and lowers the intermediate bed 3 underwater.

On the vertical groove side of the chain 14, a drive sprocket 16 and auxiliary sprockets 17 are arranged on both sides of the chain 14, sandwiching the chain 14 therebetween, and the drive sprocket 16 reliably drives the chain 14. The middle floor 3 can be raised and lowered. The drive shaft 18 of the drive sprocket 16 is brought out from the vertical groove 5 into a prime mover chamber 19 outside the vertical groove 5 in a watertight manner. A motor 20 with a brake is provided in the engine room 19, and the rotation of the motor 20 is reduced by a reducer 21 and connected to the drive shaft 18 via a torque limiter 22. The torque limiter 22 slips when a torque exceeding a specified value is applied to the drive shaft 18 to prevent further rotation from being transmitted. Here, the drive sprocket 16 is provided separately from the sprockets 12 at the upper and lower ends, but a method may be adopted in which either the upper or lower sprockets 12 is driven.

A detection disk 23 is attached to the drive shaft 18 in order to detect rotation, and the rotation state of the drive shaft 18 is detected by a sensor.
24 and sent as an electrical signal to the lift control circuit 50 shown in FIG. By accurately detecting the rotation of the drive shaft 18, the lift control circuit 50 can grasp the movement of the intermediate floor 3 connected to the chain 14, which moves up and down in unison with the rotation of the drive shaft 18. be. As the driving sprocket 16 rotates, the chain 14 pulls the protruding arm 10 of the intermediate floor upward or downward, suspending the intermediate floor 3 and raising or lowering it.

FIG. 3 shows a diagram showing how to hang a wire rope pulley. A wire row is connected between the upper and lower pulleys 13, which are rotatable on the support shaft 11 provided above and below the vertical groove 5.
The pool side of the wire rope 15 is seated and fixed above and below the protruding arm 10 of the middle floor 3 via U-shaped brackets 25, and the wire rope 15 is suspended vertically. There is a wire rope fixing device 26 in the middle on the groove side, which constitutes the lifting device 6. Here, the way to hang the wire rope on the upper pulley 13 is to hang it from the pool side, make one and a half turns around the pulley 13, and then hang it on the lower pulley 13. The lower part of the pulley 13 is half-wound. Figure 4
2 shows a vertical cross-sectional view of the upper pulley with a wire rope attached. The pulley 13 is rotatably attached to the support shaft 11, and the pulley groove bottom 13a has a round bottom slightly larger than the diameter D of the wire rope, and the depth H of the groove is twice the diameter D of the wire rope. exceed. The cross section of the pulley groove is V-shaped with a round bottom, and the width of the V-shape is approximately twice the diameter D of the wire rope at the wide portion W.

Therefore, the wire rope 15 is placed on the pool side, that is, the wire rope 15a that is lifting the protruding arm 10 is on the bottom surface 13a of the pulley groove, and at the position where the pulley 15 is wrapped once, it touches the wide part of the pulley groove. The two wire ropes intersect at W, and the wire rope 15b, which has entered the second roll, is
It is placed on the upper side of the groove, holds down the lower wire rope 15a, and winds it half way toward the lower pulley 13. Due to the way the wire rope 15 is hung on the upper pulley 13, the first wire rope 15a is pressed against the pulley 13 by the second wire rope 15b. This pressing force is greatest when the wire rope 15 is under tension. In the normal case, that is, the wire rope 15 stretched between the upper and lower pulleys 13 has some play, and in a loose state, the wire rope 15 wound around the upper pulley 13 The wire ropes 15a and 15b can also cross each other without difficulty, and there is not much pressure on the lower wire rope 15a. Therefore, in this state, middle floor 3
The wire rope 15 can be easily moved up and down by the pulley 1.
It can be rotated by 3 and 13. However, when the wire rope 15 is fixed by the wire rope fixing device 26 described below, the play in the wire rope 15 disappears, and the wire rope 15 is tightened and attached to the upper pulley 13. In the wound wire rope 15, the first turn of the wire rope 15a is firmly pressed down by the second turn of the wire rope 15b.

A wire rope fixing device 26 is provided in the vertical groove, and the wire rope fixing device 26 is arranged in a U-shape on the circumference close to the wire rope 15 on the vertical groove side. 2 with grooves
Two fixed round bars 27, 27 are fixedly arranged at right angles to the wire rope 15 with an interval between them, and the wire rope 15 is sandwiched between the two fixed round bars 27, 27. The wire rope pushing part 28 with a fixed pulley is
It is attached to a clamp 29, and the air clamp 29 is driven by a pneumatic cylinder 30. pneumatic cylinder
30 is an air compressor via a solenoid valve switch 31.
Drive at 32.

FIG. 5 shows an operating state diagram of the wire rope fixing device. The wire rope pusher 28 provided at the tip of the air clamp 29 draws an arc and presses against the wire rope 15. Then, the wire rope 15 is wound around the wire rope pushing part 28 by a half turn, and the wire rope 15 is brought into sliding contact between the two fixed round bars 27, 27, and the air clamp 29 shown in the figure is attached. In the fully extended state, the wire rope 15 is in a fixed state, and the wire rope 15 is forced to move due to the load on the middle floor, and the reaction force pushes back the wire rope pusher 28. Even if I join, I can't move. This allows the wire to
The rope 15 consists of two fixed round bars 27, 27 and a wire.
The wire rope 15 is firmly fixed by contacting between the rope pushing parts 28, and the play of the wire rope 15 is absorbed by the half-turn winding of the wire rope pushing part. is lifted and fixed using only the wire rope 15.

The air clamp 29 is connected to the pneumatic cylinder 3
The tip of the pneumatic cylinder 30 is rotatably supported on a support shaft 34 on a mounting base 33 with the pneumatic cylinder 30 diagonally to the upper left. One end of an arm member 37 is attached to a support shaft 36 at the tip of the cylinder rod 35, and the other end of the arm member 37 holds the arm member 37 horizontally at the fully extended position of the cylinder rod 35, and supports the mounting base 33. It is supported by a shaft 38. A support shaft 39 is provided on the mounting base 33 at a position below the arm member 37, and a pressing arm 40 extends above the arm member 37, and its tip is bent toward the wire rope side so that the wire rope pressing portion 28 It is provided. A support shaft 41 is provided on the pressing arm 40 at a position where the arm member 37 and the pressing arm 40 intersect at right angles, and a connecting arm 42 is attached thereto, and the connecting arm 42 is connected to the supporting shaft 36 at the tip of the cylinder rod. Further, a pressing piece 43 is provided at the center of the connecting arm 42 and abuts the pressing arm 40 at right angles in a horizontal state.

Due to the structure of the air clamp 29 described above,
If the wire rope pushing part 28 fixes the wire rope 15, even if the pulley attachment arm 40 tries to move in the direction of removal, the connecting arm 42 and the pressing arm 40 intersect at right angles, and the connecting arm The pressing piece 43 presses the pressing arm 40 and cannot move. Conversely, in order to release the air clamp 29, the pneumatic cylinder 30 is retracted, and the pressing arm 40 rotates on the support shaft 39 to the horizontal position shown by the dashed line, and the wire rope pressing part 28 is moved to the wire rope position. The wire rope 15 is separated from the wire rope 15, and the wire rope 15 is released to return to the state shown in FIGS. 2 and 3. The air clamp 29 is driven by connecting the piping connected to the pneumatic cylinder 30 to the solenoid valve switch 3.
1, the pneumatic cylinder 3 is connected to the air compressor 32 through the lift control circuit 50.
The current state of expansion and contraction of the cylinder rod 35 is grasped from the sensor switches 44 and 45 provided at the solenoid valve switch 3.
This is done by controlling 1.

FIG. 6 shows a schematic block diagram of an embodiment in which a computer is used to control the elevation of the middle floor. The lift control circuit 50 includes a CPU (central processing unit) 51, a ROM (read only memory) 52, a RAM (random access memory) 53, and an I/O port (input/output unit).
The basic configuration consists of 54 components. An operation section 55 of the control panel is connected to the I/O port 54 via an A/D converter (analog/digital signal conversion) 56, and a display section 57 is connected via a display circuit 58.

Furthermore, a water level detection sensor is provided inside the pool along the height direction from the bottom to the top of the pool.
59 is connected to transmit the water level of the pool to the lift control circuit 50. As an example of the water level detection sensor 59, as shown in FIG. 7, a cylinder 63 is installed on the pool wall from the floor 2 to the pool side 4 in the vertical groove, and the bottom 64 of the cylinder is open.
Water can freely flow in and out. A floating body 65 is placed inside this cylinder 63, and the inside of the cylinder is raised and lowered as the water level rises and falls.
A string 66 attached to one end of the floating body 65 is wound around a winding device 67 at the top of the cylinder. The winding force of this winding device 67 is a spiral spring type, and the winding force is applied to the floating body 65.
Due to its own weight, the string 66 is ejected so that the floating body 65 is always on the water surface, and the string 66 is always kept taut. The water level can be detected by detecting the value of an encoder attached to the rotating shaft of the winding device 67.

A motor 20 with a brake is provided for each vertical groove lifting device, and a sensor 24 on the detection disk is connected to an A/D converter via a motor drive circuit 60. 61, and the solenoid valve switch 31 of the wire rope fixing device and the sensor switch 44 of the pneumatic cylinder.
, 45 are connected to the I/O port 5 via the cylinder drive circuit 62.
Connected to 4.

The operation of the lift control circuit 50 will now be explained. The CPU 51 operates based on a control program stored in the ROM 52. RAM53 has CPU51
The calculated values and the detected values from the sensor 24 of the detection disk are constantly stored in memory via the CPU 51 to determine the movement of each lifting device. First, the CPU 51 calculates the current water depth based on the signals from the water level detection sensor 59 and the sensor 24 of the detection disk 23, and displays this information on the display section 57 of the control panel.
The operator looks at the information on the display section 57 and inputs the height of the middle floor from the operation section 55. This input value is transferred to the A/D converter 5.
6 to the CPU 51 from the I/O port 54.

The CPU 51 controls the cylinder drive circuit 62 to connect the wire rod based on the height of the intermediate floor input while grasping the detection signals from the water level detection sensor 59 and the sensor 24.
A block release signal is sent, the cylinder drive circuit 62 switches the electromagnetic valve switch 31, the sensor switches 44 and 45 detect whether the cylinder switching has operated reliably, and a switching response signal is sent to the CPU 51, and the CPU 51 indicates the end of switching. After waiting, a drive signal is sent to the motor drive circuit 60 of each vertical groove, and the motor drive circuit 60 drives the motor 20. The CPU 51 constantly monitors the signal from the sensor 24, and when the middle floor reaches the desired height, sends a wire rope lock signal to the cylinder drive circuit 62 to switch the solenoid valve switch 31 and switch the wire rope lock signal to the cylinder drive circuit 62. - The wire rope is fixed by operating the rope fixing device.

The overall operation of the apparatus according to an embodiment of the present invention will be explained based on the flowcharts of FIGS. 8 and 9 with reference to FIG. 6. The CPU 51 reads the current water level from the detection signals of the water level detection sensors 59 arranged vertically along the vertical groove, and also reads the current water level from the detection signals of the water level detection sensors 59 arranged vertically along the vertical groove, and also reads the current water level from the detection signals of the water level detection sensors 59 arranged vertically along the vertical groove.
The height of the middle floor is read from the detected value of step 4 (step 1). Next, the difference between these values is calculated to calculate the water depth, which is the height from the current middle bed to the water surface, and the current water level, middle bed height, and water depth are displayed on the display section 57 of the control panel. It is stored in the RAM 53 together with step 2). And the operation section 55 of the control panel
The height of the intermediate floor that is suitable for the people using the pool is inputted from the screen (step 3), and the CPU 51 checks whether or not the input height of the intermediate floor is within a controllable range.
Judgment based on the values stored in step 3 (step 4)
do. If the height is inappropriate, for example, the middle floor will protrude above the water surface, a warning will be displayed on the display 57 of the operation panel to inform the operator and ask him to enter the height again (step 5). If the height is high, in order to control the height to that value, the brake of the motor 20 is released, the motor 20 is slightly moved in the direction of lifting the middle floor (step 6), and the chain is tensioned.

[0024] At the time of step 4, the chain is loose and no tension is applied to it, and the middle floor is a fixed wire roller.
It is in a state of being lifted up by the rope. Motor 2
The fine movement value of 0 is a predetermined value, and the fine movement is performed by grasping the change in the detection signal of the detection disk 23 by the CPU 51. Through this step 6, the chain is tensioned while the middle floor maintains its height, and the load that was previously applied to the wire rope is now transferred from the wire rope to the chain. The tensile load is transferred.

Next, the wire rope fixing device is released, the wire rope is freed, and the load on the middle floor is completely transferred to only the chain (step 7). The motor is started to drive so that the middle floor is at the floor level, and the chain is driven to raise and lower the middle floor (step 8). While the motor is running, the water depth is always detected (step 9), and sensor 2
4, the lifting and lowering of the lifting device is determined from the rotational state of the detection disk (step 10), and it is determined whether the height of the intermediate floor is within the appropriate range (step 11). If water leaks out and the middle bed comes out above the water surface, the height of the middle bed entered in step 3 is inappropriate, so in that case, a warning will be displayed on the display 57 of the operation panel. display (step 12), stop the motor 20, and turn on the brake.
(step 16), switches the solenoid valve switch 31 and operates the wire rope fixing device (step 17)
This prevents excessive tensile load from being applied to the chain.

If the height of the middle bed is underwater in step 11, the sensor 24 of each detection disk detects whether the lifting devices of each vertical groove are moving simultaneously to raise and lower the middle bed horizontally. Judging from the value (step 13), if there is a lifting device that is moving behind, the motor 20 is accelerated to recover from the delay (step 14), and an attempt is made to raise and lower the intermediate floor horizontally, and the process returns to step 9. In step 13, the driving status of each lifting device is ascertained from the detected values of each sensor 24, and if the middle floor is moving up and down smoothly, the process returns to step 9 until the middle floor reaches the target height. When the middle floor reaches the target height, turn the motor 20
The drive of the chain is stopped and the brake is applied (step 16) to prevent the chain from lowering further due to the weight of the middle floor. Then, the solenoid valve switch 31 is switched and the wire rope fixing device is driven to fix the wire rope (step 17). At the time of step 17, the intermediate floor is suspended by the fixed chain, and if only the wire rope is fixed, a load is also applied to the chain.

Then, after fixing the wire rope, the motor 2
0 brake and slightly move the motor 20 (step 18), move the chain in the direction of slightly lowering the middle floor to loosen the chain, and then apply the brake to the motor 20. Then, the robot comes to a standstill (step 19). The fine movement value of the motor 20 is a predetermined value simply by loosening the chain, and the fine movement is performed by checking the change in the detection signal of the sensor 24 of the detection disk by the CPU 51. As a result, the intermediate floor is suspended and fixed by the wire rope while maintaining its height, and the load that was previously applied to the chain is transferred to the wire rope. This allows the suspension load of the middle floor to be transferred from the chain to the wire rope,
This completes the series of raising and lowering of the middle floor.

[0028] In this embodiment, the entire floor of the pool is raised and lowered, but the floor to be raised and lowered can also be raised and lowered in parts, in which case the number of vertical grooves on the pool side can be increased. The floor is divided into two sections, one for children and one for adults, and raised and lowered separately. Further, although a pneumatic cylinder is used as the wire rope lock device, it is not limited to the pneumatic cylinder, and of course it may be hydraulically driven, hydraulically driven, or electrically driven.

[0029]

[Operations and Effects] With the above-mentioned configuration, when the present invention raises and lowers the middle bed underwater, the lifting devices of each vertical groove are moved simultaneously, and the middle bed is moved while precisely controlling the raising and lowering by a chain drive. It can be raised and lowered while keeping it level. When the middle floor reaches the desired height, fix the chain and the attached wire rope, then loosen the chain and allow the wire rope to take the load of the middle floor. . This allows the pool to
In addition to preventing tensile fatigue of the chain due to the weight of many people applying to the middle floor when using the pool, it also prevents the wire rope from being damaged even when the water in the pool is drained for cleaning or inspection. It can support the middle floor with strong tensile force.

Here, when hanging the wire rope on the upper pulley, the wire rope that is lifting the protruding arm of the middle floor becomes the lower groove of the upper pulley, and the upper pulley is wrapped around one and a half turns. Place it above the wire rope in the lower groove of the pulley and press down on the lower wire rope. When the wire rope is fixed using the wire rope fixing device, the wire rope is stretched by the distance that draws the arc of the wire rope pushing portion of the wire rope fixing device. The actual tension applied to the wire rope fixing device is not due to the entire load of the middle bed, but rather the upper pulley acts as a cushion and intervenes between the tension due to the load of the middle bed. It brings balance. Therefore, even when lifting and fixing a heavy intermediate floor with a wire rope, as long as the wire rope has the tensile durability,
The upper pulley has one and a half turns of the wire rope, making it difficult for the pulley to rotate. When the wire rope fixing operation is completed, the wire rope that lifts the middle floor is on the bottom side of the pulley groove, and the wire rope with one and a half turns is pressed on the upper side, so the wire rope is not attached to the pulley shaft. - By winding the rope one and a half times, the load absorption rate of the intermediate floor is reliably increased, and the wire rope can be fixed with less durability against the tensile force applied to the wire rope fixing device.

That is, when the middle floor is raised and lowered, it is raised and lowered by a chain that can be easily precisely controlled, and when it is at rest, a wire rope that is strong against tensile loads is used. Therefore, since the load is transferred by taking advantage of the characteristics of each, it becomes easier to control the lifting and lowering movements, and the tensile load during fixing increases, so even if the durable tensile force of the wire rope fixing device is small, good. Furthermore, there is no need to provide any equipment on the bottom of the pool, making cleaning and other maintenance work easier.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a pool equipped with an intermediate floor lifting device of the present invention.

FIG. 2 is a partial sectional view of the pool.

FIG. 3 is a diagram showing how to hang a wire rope.

FIG. 4 is a vertical cross-sectional view of the upper pulley with a wire rope hung thereon.

FIG. 5 is an operational state diagram of the wire rope fixing device.

FIG. 6 is a schematic block diagram of drive control of the intermediate floor.

FIG. 7 is an example of a water level detection sensor.

FIG. 8 is a part of a flowchart showing an example of the operation of the present invention.

FIG. 9 is a part of a flowchart showing an example of the operation of the present invention.

[Explanation of symbols]

1 Pool 3 Middle floor 5 Vertical groove 6 Lifting device 7 Frame 10 Protruding arm 12 Sprocket 13　Pri- 14 Chain 15 Wire rope D Wire rope diameter H Width of wide part of pre-groove W Pre-groove depth 16 Drive sprocket 20 Motor 23 Detection disk 26 Wire rope fixing device 29 Air clamp 50 Lifting control circuit

Claims (1)

[Claims] [Claim 1] Each of the pools has an intermediate floor arranged horizontally in the pool, a plurality of vertical grooves provided in the pool side wall surface, and a lifting device provided in each vertical groove to raise and lower the intermediate floor. A pair of sprockets and pulleys are installed on horizontal rotating shafts at the upper and lower ends of the vertical groove, a chain is passed through the pair of sprockets, a wire rope is passed between the pair of pulleys, and the chain is - The chain and wire rope are fixed to the arm members of the middle floor that protrude into the vertical groove, and the drive sprocket that engages with the chain is rotated by the prime mover to drive the chain and raise and lower the middle floor. The wire rope is moved as the middle floor rises and falls, and when the middle floor is stationary, the wire rope is fixed by a wire rope fixing device, and the wire rope is fixed in place in the swimming pool holding the middle floor. In a floor lifting device, a wire rope that suspends the middle floor is placed on the pulley at the upper end of each groove, and the wire rope is placed on the bottom side of the pulley groove, wrapped one and a half times, and stretched over the pulley at the lower end. It is V-shaped with a round bottom that is slightly larger than the diameter of the rope, and the depth of the pulley groove is more than twice the diameter of the wire rope, and the width of the pulley groove is equal to the diameter of the wire rope at the wide part. 2
A mid-floor lifting device for a swimming pool, which is characterized by being more than double the height of the swimming pool.