JP2000002008A - Pool-floor lifting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lift, lower and hold a movable floor accurately while reducing driving force in a pool-floor lifting device having a plurality of link mechanisms freely bent and stretched in the vertical direction between the movable floor capable of being elevated and lowered along the sidewall of a pool and a pool base bottom. SOLUTION: In each link mechanism, an upper link 63a and a lower link 63b are connected in a freely bending-stretching manner by a pin 71 in a chevron shape while the upper end of the upper link 63a rotatably supports a movable floor 60 in the vertical direction by a pin 68, the lower end of the upper link 63a is similarly supported rotatably in the vertical direction by a pin 70 to a pool base bottom 50c. On the other hand, a moment arm 73 erected from a section in the vicinity of the pin 70 at the center of rotation of the lower link 63b is formed integrally while a stopper 75 retaining the moment arm 73 at a specified place exceeding a link dead point at the time of the bending and stretching of the above-mentioned link mechanisms is installed to the pool base bottom 50c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a link mechanism used in a pool floor elevating device.

[0002]

2. Description of the Related Art In order to adjust the water depth of a pool, it is known to provide a movable floor which can be moved up and down (actually, Japanese Utility Model Application Laid-Open No. 5-9235).
No. 2). FIG. 15 shows an example of such a movable floor, which is movable up and down in the pool 1. A pantograph link mechanism 31 is interposed between the pool base 1c and the movable floor 10 (pool floor).

[0003] The link mechanism 31 is formed as a scissor with two upper and lower stages by connecting two pairs (four) of equal length links 33 and 35 with pins. One lower end is supported by a pin via a bracket 34 fixed to the pool base 1c, and the other end is connected to a roller 36 by the pool base 1c.
Supported movably through the One end on the upper side is supported by a pin via a bracket 34 fixed to the pool floor 10, and the other end is movably supported on the pool floor 10 via a roller 36.

The link mechanisms 31 are arranged vertically and horizontally on the plane of the pool, and are connected to a drive source M via a drive shaft 32 for each row. When the drive source M operates in the forward or reverse direction, the scissors bend in the vertical direction due to the reciprocation of the drive shaft 32 accompanying this. The driving source M is a room R provided on the side wall of the pool 1 (for example, an observation room).
Placed in Reference numerals 32a and 38 denote a rack and a pinion for converting the rotation of the drive source M into advance / retreat of the drive shaft 32, 39 denotes a bearing of the drive shaft 32, and 1e denotes a sealant for sealing a through hole of the drive shaft.

[0005] The pool floor 10 is supported in a horizontal state via each link mechanism 31, and when each link mechanism 31 bends and extends synchronously, it rises and falls along the side wall 1d of the pool 1, whereby the water depth of the pool 1 is increased. Can be adjusted arbitrarily. In the case of FIG. 16 (single-stage scissors), the shared load of the links 33 and 35 is W
Then, F = bW / a. Note that F = 2 · b · W / a for the two-stage scissors.

[0006]

It is conceivable that such a pool facility is used as a gymnasium. In that case,
The pool floor 10 is held at substantially the same height position as the pool side (the upper surface of the pool side wall 1d) by the elevating device (configured by the link mechanism 31, the drive shaft 32, the drive source M, and the like). In the range in which the water depth of the pool 1 is adjusted, the buoyancy of the water acts, so that a large driving force is not required for raising and lowering and holding the pool floor 10, but when used as a gymnasium, it is not underwater in the pool. The load shared by the links 33 and 35 for raising and lowering and holding the pool floor 10 increases. The power of the two-stage scissors is F = 2 · b · W / a, and the smaller the scissors height a becomes, the smaller the scissors height a is. However, a considerable driving force is required for raising and lowering and holding the pool floor 10. There is a problem that the size of the entire apparatus such as the source M and the cost are increased.

An object of the present invention is to provide means for solving such a problem.

[0008]

According to a first aspect of the present invention, there is provided a pool floor lifting / lowering apparatus having a plurality of vertically movable link mechanisms between a movable floor movable up and down along a side wall of the pool and a pool base. , Each link mechanism connects the upper link and the lower link flexibly in a U-shape with pins,
The upper end is supported on the movable floor by a pin so as to be freely rotatable in the vertical direction, and the lower end is also supported on the base of the pool by the pin so as to be rotatable in the vertical direction, while the lower link is a moment erecting from the vicinity of the rotation center pin. The arm is integrally formed, and a stopper for locking the moment arm at a predetermined position beyond the link dead center when the link mechanism is extended is provided on the pool base.

According to a second aspect, in the first aspect, a stay for connecting a middle portion of the lower link and a distal end portion of the moment arm in a triangular structure is provided.

[0010] In the third invention, each link mechanism includes one set of two links.
The moment arms are set so that the operating directions of the moment arms oppose each other, and at the center of each set, a lever that can rotate freely in the horizontal direction via the central axis is arranged on the pool base at the center of the pool. And a rod connecting the arm ends of one link mechanism located on both sides of the lever, and a rod connecting the arm ends of the other link mechanism to the other end of the lever.

[0011]

According to the first aspect of the present invention, the moment arm rising from the vicinity of the pin (the rotation center of the lower link) supporting the lower end of the link mechanism on the pool base can be as large as possible. Therefore, at the deepest position of the pool, the lower link of each link mechanism falls down to the pool base and bends so that the upper link overlaps this, but it is necessary to cause the lower link from this state and extend the upper link upward Driving force can be reduced. In addition, in each link mechanism, the moment arm is locked to the stopper at the base of the pool at a predetermined position beyond the link dead center, so that even when using the gymnasium, the movable floor can be moved to that position without adding holding force to the moment arm. Can be held stably.

In the second aspect, the rigidity of the lower link with respect to the moment can be efficiently improved by adding the stay.

In the third aspect, when a driving force is input to the lever in the direction of its rotation, the driving force is transmitted to the moment arms of the two link mechanisms via the rods, respectively.
Raise and lower these lower links. That is, it is possible to synchronously bend and extend these link mechanisms into one set of link mechanisms on both sides of the lever.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 to 3, reference numeral 60 denotes a movable floor (pool floor) of a pool 50, which is formed by a frame 61 having a plane lattice shape and a floor panel 62 covering the upper surface thereof. A drive and driven link mechanism 63, 64 that can be bent and stretched in a V-shape between the pool floor 60 and the pool base 50c.
Are arranged, and the pool floor 60 is provided with pool side walls 50a and 50b.
Along a roller 65 so as to be able to move up and down.

In this case, since the pool is large, the pool floor 60 is divided into four parts in the vertical and horizontal directions of the rectangular plane, and the divided surfaces can slide freely via the side plates 66a and 66b (see FIGS. 8 and 9). Joined to. Each part 60a-6 of the pool floor 60
At 0d, the driving link mechanisms 63 are arranged in a horizontal direction with a balance of four rows by two columns. The driven link mechanisms 64 are arranged in two rows and two columns vertically in a well-balanced manner.

Each of the link mechanisms 63 and 64 has an upper link 63.
a, 64a and lower links 63b, 64b, each of which is formed in a rectangular frame. FIG. 4-
As shown in FIG. 7, the upper links 63a and 64a are connected to the pool floor 60 (60) at the upper ends of the vertical members 67a (pillars) of the frame.
The lower link 63b, 64b is supported at the lower end of a vertical member 67b (pillar) of the frame by a pin 70 via a bracket 68 fixed to the pool base 50c at the lower end of the frame vertical member 67b (pillar). It is supported to rotate freely in the vertical direction.

The vertical members 67 of the upper links 63a, 64b
The lower end of a and the vertical members 67b of the lower links 63b and 64b
Is connected to the upper end by a pin 71 so as to be freely rotatable in the vertical direction.
By bending and extending these pins, the height of the pool floor 60 can be arbitrarily adjusted between the use position as the gymnasium and the deepest position as the pool as shown in FIGS. The drive link mechanism 63 regulates the vertical movement of the pool floor 60 (60a to 60d), and rotates the pool floor 60 in accordance with the rotation of a lever 80 described later.
(60a-60d) is moved up and down. Follower link mechanism 6
4 bends and stretches following the elevation of the pool floor 60 (60a to 60d) while restricting the lateral movement of the pool floor 60 (60a to 60d).

The link mechanism 63 for driving is provided with a moment arm 73 which stands substantially perpendicularly from the vicinity of the center of rotation (pin 70) of the lower link 63b on each of the opposing surfaces, and is provided between the end of the moment arm 73 and the vertical member 67b. A stay 74 for connecting the parts into a triangular structure is formed (see FIGS. 4 and 6). And
A stopper 75 that locks the moment arm 73 at a predetermined position (use position as a gymnasium) beyond the link dead center when the link mechanism 63 is extended is provided on the pool base 50c.

As shown in FIGS. 10 and 11, a lever 80 is arranged at the center between the link mechanisms 63 in each row. The lever 80 is rotatably supported in the horizontal direction on the pool base 50c via the center shaft 81, and provided with rods 82a and 82b for transmitting the rotation to the moment arms 73 of the link mechanisms 63 on both sides.

One end of one rod 82a is connected to one end of the lever 80 via a pin 83a so as to be freely rotatable in the horizontal direction. The other end of the rod 82a has a pin 83b attached to the end of a moment arm 73 of one link mechanism 63. Are connected so as to be freely rotatable vertically. One end of the other rod 82b is rotatably connected to the other end of the lever 80 in the horizontal direction via a pin 83a, and the other end of the rod 82b is connected to the tip of the moment arm 73 of the other link mechanism 63 by a pin 83b.
Are connected so as to be freely rotatable vertically.

When the lever 80 rotates, its movement is transmitted through the rods 82a and 82b to the moment arm 7.
3, the lower link 63b is rotated integrally with the moment arm 73 about the pin 70, and the upper link 63a is bent in the vertical direction.

A rotating shaft (shaft) 85 extending in the longitudinal direction of the pool side wall 50a for each of the portions 60a to 60d of the pool floor 60, and a reversely rotatable reduction motor 8 connected thereto.
6 are provided (see FIG. 1). One end of a drive shaft 87 is connected to one end of each lever 80 via a pin 88a so as to be rotatable in the horizontal direction, and the other end is connected to a side wall 50a of the pool.
And is extended so as to be orthogonal to the rotation shaft 85 (see FIGS. 4 and 10).

The drive shaft 87 has a rod 87a on the lever 80 side.
And a rod 87b on the rotating shaft 85 side, which is rotatably connected in a horizontal direction via a pin 88b, to a guide 89 (provided with a water leakage preventing function) on the pool side wall 50a. It is movably supported via 87b. A screw 90 is attached to the rod 87b on the rotating shaft 85 side.
Is provided, and the rotation of the drive shaft 87 between the rotation shaft 85 and the drive shaft 87 is provided.
A screw drive unit 91 for converting the movement into the forward and backward directions is interposed.

When the deceleration motor 86 operates, the driving force is transmitted from the rotating shaft 85 to the driving shaft 87 via the screw driving unit 91. Then, as the drive shaft 87 advances and retreats,
When the lever 80 rotates, the lower link 63 is moved as described above.
b rotates together with the moment arm 73 about the pin 70 as a fulcrum, thereby bending the upper link 63b in the vertical direction. Therefore, the height of the pool floor 60 (60a to 60d) can be arbitrarily adjusted between the use position as the gymnasium and the deepest position as the pool by the drive link mechanism 63 which bends and stretches synchronously. is there.

At the lowest position (the deepest position as the pool) of the pool floor 60 (60a-60d), the lower link 6
3b falls down to the pool base 50c, and is bent so that the upper link 63a overlaps this. Moment arm 73
Is pulled by the rods 82a and 82b, the lower link 63
b rotates in the upright direction to extend the upper link 63a. At this time, assuming that the shared load of the link mechanism 63 is W, the driving force required to cause the lower link 63b is:
F = b · W / a · sin α. Specifically, a = 50
0 mm, b = 600 mm, α = 24 °, F
= 2.95W.

The moment arm 73 includes a lower link 63
FIG. 6B shows an erect position near the rotation center (pin 70) of FIG.
A dimension can be made large. Therefore, the pool floor 60 (6
0a to 60d), the lower link 63b
From the pool base 50c and the upper link 63a
The driving force required to extend the arm upward can be efficiently reduced.

In the use position as a gymnasium, the pool floor 60 (60a-60d) is provided with a driving link mechanism 63.
Is maintained at substantially the same height as the poolside via the. In this case, since the buoyancy of water does not work, the shared load W of the link mechanism 63 increases. However, the link mechanism 63 is supported by the stopper 75 of the pool base 50c via the moment arm 73 at its use position, so It is not necessary to drive the deceleration motor 86 as a holding force against the load W.

In the link mechanism 63, the moment arm 73 is locked to the stopper 75 in a position exceeding the link dead center, so that the pool floor 60 (60a to 60d) can be stably held at the use position as a gymnasium. Further, in the link posture exceeding the link dead point, as shown in FIG.
₁ is will be borne by the lower link 63 b, the annexed of the stay 74, (P area in FIG. 6) a cross-sectional performance taken large, since the moment w ₂ decreases, the vertical members 67
The size b can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a pool representing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is an enlarged view showing a portion C in FIG. 1;

FIG. 5 is an enlarged view showing a portion D of FIG. 2;

6 is a sectional view taken along the line EE of FIG. 4;

FIG. 7 is a sectional view taken along the line FF of FIG. 4;

8 is a view taken in the direction of the arrow G in FIG.

FIG. 9 is a view taken in the direction of the arrow H in FIG.

FIG. 10 is an explanatory diagram showing a planar configuration of the link interlocking mechanism.

FIG. 11 is an explanatory diagram showing a cross-sectional configuration of the link interlocking mechanism.

FIG. 12 is an explanatory diagram showing an operation mode of a drive link.

FIG. 13 is an explanatory diagram showing an operation mode of a driven link.

FIG. 14 is an explanatory diagram of a drive link.

FIG. 15 is a configuration diagram of a conventional example.

FIG. 16 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 Reference Signs List 50 pool 50a, 50b pool side wall 50c pool base 60 pool floor (movable floor) 63 drive link mechanism 63a upper link 63b lower link 64 driven link mechanism 65 roller 68, 70, 71 pin 73 moment arm 74 stay 75 stopper Reference Signs List 80 lever 82a, 82b rod 85 rotating shaft 86 deceleration motor 87 drive shaft 90 screw 91 screw driving unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuhiro Suzuki 2-4-1 Hamamatsucho, Minato-ku, Tokyo World Trade Center Building Kayaba Industry Co., Ltd. (72) Inventor Katsuaki Mawatari Honmachi, Chuo-ku, Osaka-shi, Osaka 4-1-1-13 Takenaka Corporation Osaka Main Store (72) Inventor Tatsuichi Nakama 4-1-1-13 Honmachi Chuo-ku Osaka-shi Osaka Prefecture Takenaka Corporation Osaka Main Store (72) Inventor Masuda Yukio 4-1-1-13 Honcho, Chuo-ku, Osaka-shi, Osaka Takenaka Corporation Osaka Main Store

Claims (3)

[Claims] 1. A pool floor raising / lowering apparatus comprising a plurality of link mechanisms vertically movable between a movable floor movable up and down along a side wall of a pool and a base of the pool, wherein each link mechanism comprises an upper link and a lower link. A pin is bent and stretched in a U-shape, and the upper end is supported on the movable floor by a pin so as to be freely rotatable in the vertical direction, and the lower end is similarly supported on the base of the pool by a pin so as to be freely rotatable in the vertical direction. The lower link is integrally formed with a moment arm that rises from the vicinity of the rotation center pin, and a stopper is provided at the pool base to lock the moment arm at a predetermined position beyond the link dead center when the link mechanism is deployed. A pool floor elevating device. 2. The pool floor elevating device according to claim 1, further comprising a stay connecting a middle portion of the lower link and a tip portion of the moment arm in a triangular structure. 3. A pair of link mechanisms is set so that the operating direction of the moment arm of each pair is opposite to each other, and the link mechanism is rotated in the horizontal direction at the center of each pair via the central axis to the pool base. While a free lever is arranged, one end of the lever is connected to the arm end of one link mechanism located on both sides sandwiching the lever, and the other end of the lever is connected to the arm end of the other link mechanism. The pool floor elevating device according to claim 1, further comprising: