JP3204078B2 - Driving mechanism for raised and lowered seats - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving mechanism for a raised seat.

[0002]

2. Description of the Related Art FIG.
FIG. 32 is an explanatory view of a driving mechanism of a conventional raised-type spectator seat disclosed in Japanese Patent Laid-Open Publication No. H10-260, and FIG. 32 is an enlarged view of a portion A in FIG. The prior art will be described with reference to FIGS. In the drawing, reference numeral 51 denotes a floor plate of a seat, 52a, 52b and 52c support legs, 53a and 53b a screw jack piston, 55 a sprocket driving electric motor, and 56 a guide rail. Reference numerals 57, 58, and 59 denote pins. The pins 59 rotatably attach the lower ends of the support legs 52b to the lower ends of the pistons 54a and 54b of the screw jacks. 61, 61 are columns, 62a, 62
b is a sprocket, 63 is a chain, 64 is a speed reducer of the sprocket driving electric motor 55, and 65 is a wheel rotatably supported by a pin 59.

A support leg mounting frame 66 is provided with bearings 67 at the upper ends of the cylinders 53a and 53b of the screw jack. The pins 57 pass through the bearings 67 and are mounted on the columns 61. Each of the screw jacks has a column 61 and a pin 57 on the floor plate 51.
It is supported so that it can be tilted through. Further, the sprocket 62 is formed by the bearings 67 of the cylinders 53a and 53b.
a, 62b are rotatably supported, and each sprocket 62
The chain 63 is suspended between the screw jacks a and 62b, the electric motor 55 for driving the sprocket and the speed reducer 64 are attached to the cylinder 53a of one screw jack, and the pistons 54a and 54b of the screw jacks are connected to the sprockets 62a. , 62b are operated in the expansion and contraction direction in conjunction with the rotation of the rotation.

Next, the operation will be described. When raising the floor plate 51 of the seat, the electric motor 55 for driving the sprocket is activated, the rotation is transmitted to the sprocket 62a via the speed reducer 64, and the sprocket 62a is rotated, and the screw jack of the sprocket 62a side is rotated. When the piston 54a is operated in the extension direction in conjunction with the rotation of the sprocket 62a,
2a is rotated by a sprocket 62b through a chain 63.
To rotate the sprocket 62b, and the piston 54b of the screw jack on the sprocket 62b side
Is operated in the extension direction in conjunction with the sprocket 62b. At this time, while the wheels 65, 65 attached to the lower portions of the screw jacks move along the guide rails 56, the screw jacks move in the upright direction centering on the upper end pins 57 of the cylinders 53a, 53b, and the viewing seats Floor plate 51 rises. When the floor plate 51 of the seat is lowered, the electric motor 55 for driving the sprocket is started in the reverse direction, and the operation reverse to the case of raising the floor plate 51 of the seat is performed.

[0005]

The conventional mechanism for driving the up-and-down seats configured as described above has the following problems. The first problem is that it is necessary to attach two driving screw jacks, and it is necessary to operate each screw jack at the same speed and at the same position in synchronization. For this reason, a complicated control method must be used. No. Further, two driving screw jacks are required, and a sensor and a control device for controlling the two screw jacks are also required, so that the manufacturing cost is increased. Further, as a second problem, since a compressive load is always applied to the driving screw jack and there is a fear of buckling, it is necessary to make the driving screw jack highly rigid and thick.

Further, as a third problem, the elevating speed of the seat is not constant when the seat is raised and lowered, and particularly when the seat is lowered, the elevating speed is increased. When using a screw jack, it is necessary to increase the starting power. For this reason,
Select a screw jack with a large starting power or
The speed must be reduced by controlling the speed, and in any case, there is a problem that the cost is increased. The fourth problem is that the screw jack is inclined when the seat is in a descending state, so that the power of the screw jack required at the time of startup becomes maximum, and the screw jack having a large starting power and a speed reducer having a large speed ratio are required. However, there is a problem that the cost is increased similarly to the third problem.

In order to clarify the third and fourth problems, the inventor modeled and theoretically analyzed the conventional apparatus shown in FIG. FIG. 33 is a diagram of a model of a conventional apparatus, in which L is the length of a link (support leg), y is the height of a seat, x is the length of a screw jack, M is the weight of the seat, A Represents the horizontal distance between the link, the screw jack, and each of the joints of the seat, and B represents the vertical distance between the link, the screw jack, and each of the joints of the seat. When the load F applied to the screw jack and the elevating speed V of the seat are obtained by using the analysis model shown in FIG. However, the number 1 x _n, y _n indicate that he or she dimensionless by L, V _x represents the expansion and contraction speed of the screw jack.

[0008]

(Equation 1)

Equation 1 is made dimensionless by applied load M (F
_n = F / M), the lift speed V and stretching velocity V _x dimensionless the screw jack _{(V n = V / V x} ), when obtaining the normalized load force F _n and normalized elevation speed V _n, the following Number 2 of
become that way.

[0010]

(Equation 2)

FIG. 34 is a graph showing the mathematical expression expressed by the above equation (2). In this graph, the horizontal axis is the height of the seats divided by the link length (normalized height)
Is shown. The vertical axis represents the value obtained by dividing the load applied to the screw jack by the weight of the seat (normalized load), and the value obtained by dividing the elevating speed of the seat by the expansion / contraction speed of the screw jack (normalized elevating speed). Is shown.

As shown in the graph of FIG. 34, the performance curves of the load applied to the screw jack and the elevating speed of the seat are the same, and are represented by solid lines. As can be seen from this graph, the load applied to the screw jack and the elevating speed of the seat are not constant with respect to the elevating height, and the values of the state where the seat is at the top and the state where the seat is at the bottom are The value ratio is about 3. That is, in the state at the lowest position, both the load applied to the screw jack and the elevating speed of the seat are about three times those values in the state at the highest position. From this, the above-mentioned third and fourth problems were theoretically clarified.

The present invention has been made to solve the above first to fourth problems, and can be driven by a single small-capacity driving means such as a screw jack without a complicated control method. The purpose is to obtain a drive mechanism for the up-down seats.

[0014]

[0015]

According to the present invention, there is provided a driving mechanism for a lift-type spectator seat, wherein one end is rotatably attached to a lower portion of the spectator seat.
And the other end is slidably mounted on the base.
A pair of support members attached to support the grandstand,
When one end is rotatably connected to an intermediate point of the support member,
In both cases, the length of the one end side is set to half the length of the support member.
The bend is pivotally mounted on the base
A pair of L-shaped members and both end portions are configured to be extendable and contractible.
Both ends are interposed between the other ends of the pair of L-shaped members.
Telescopic drive means, and extend and retract both ends of the telescopic drive means
By causing the pair of support members to be
Pivoting about the pivot point of
It is obtained as that.

Further, one end pivotally mounted on the outside of the pivot point of the pair of support members in the bleachers lower, the distance of the other end is the該回moving point and the pivot point of the support member A second support member is provided which is connected to the other end of the support member via a connection member having an equal length and is slidable together with the other end of the support member.

Further , one end is rotatably mounted below the seat.
With the other end slidably mounted on the base.
A pair of support members attached to support the grandstand
And a bent portion is rotatably attached to a lower portion of the seat.
And the length of one end is set to the same length as the support member.
The one end is located between the pivot point of the support member and the bent portion.
Said support via a connecting member of a length equal to the distance of the pivot point
Connected to the member and slidable with the other end of the support member
A pair of L-shaped members and both ends are extendable
The two ends are the other ends of the pair of L-shaped members.
Telescopic driving means interposed between the telescopic driving means
The pair of supports is provided by expanding and contracting both ends of the means.
The member is turned around a turning point with respect to the seat,
The seat is driven up and down .

Also, one end is rotatably mounted below the seat.
With the other end slidably mounted on the base.
A pair of support members attached to support the grandstand
When the bent portion is rotatably mounted on the base
Both ends have the same length as the support member.
The one end and the intermediate point between the support members are rotatably connected.
And one end is slidably attached to the bottom of the seat.
A pair of L-shaped members attached to each other and both ends
The two ends are interposed between the other ends of the pair of L-shaped members.
And telescopic driving means installed therein,
By expanding and contracting both ends, the pair of support members
Rotate around the pivot point with the grandstand, and move the grandstand
It is designed to be driven up and down .

Further, a stopper is provided for defining a rotation angle of the L-shaped member in the ascending direction of the seat.

Further, the stopper is slidably mounted on the base and is in contact with the lower side of the connecting side piece of the L-shaped member with the telescopic drive means, and the contact position of the block member with the connecting side piece. And adjusting means for adjusting.

Further, a cushioning member is provided between at least one of the connecting portions between one end of the L-shaped member and the expansion / contraction drive means.

Further, the bending angle of the bending portion of each L-shaped member is made acute.

One end of the support member is rotatably mounted outside the pivot point of the pair of support members at the lower part of the seat, and the other end is connected to the other end of the support member via a connection member. And a plurality of pairs of support members constituting a parallel movement mechanism.

Furthermore, a pair of L
It comprises a wire connecting each end of the shaped member, and a winding means for winding up the wire.

The wire has one end attached to one end of the pair of L-shaped members and the other end connected to a wheel rotatably mounted at least on the other end of the pair of L-shaped members. It is made to be wound.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a schematic diagram of one embodiment of the present invention. In the drawing, reference numeral 1 denotes a seat where a plurality of individual seats (not shown) are installed.
A space is provided for accommodating the L-shaped members 5a and 5b and the telescopic drive device 6 and a space for accommodating a seat in a state in which the seat is down. 2a and 2b are a pair of support members whose one ends are rotatably attached to the seat and the other ends are rotatably attached to one ends of connecting members 3a and 3b described later. 4a and 4b are rotatably mounted at one end to a position outside the mounting position of the support members 2a and 2b and the viewing seat 1 in the viewing seat 1 by a predetermined distance, and the other end is connected to the other end of the connecting members 3a and 3b. It is a pair of support members rotatably attached to the side. 3a and 3b are a pair of connecting members slidably mounted on the base. Support member 2
a, 2b, 4a, 4b are set to the same length, and the distance between the support members 2a, 2b, the support members 4a, 4b, and the pivot points at both ends are all set to be the same. Therefore, the seat 1, the support members 2a and 4a, and the connecting member 3a, and the seat 1, the support members 2b and 4b, and the connecting member 3b constitute a parallel movement mechanism.

Reference numerals 5a and 5b denote L-shaped members whose long sides are set to half the length of the support members 2a and 2b.
One end is rotatably pin-connected to the center of the support members 2a, 2b, and the bent portion is rotatably attached to the base or frame. Reference numeral 6 denotes an expansion / contraction drive device for connecting one end of each of the short sides of the L-shaped members 5a and 5b, and the length between both ends is configured to be extendable. In the above configuration,
Support members 2a, 2b, L-shaped members 5a, 5b, connecting member 3
a and 3b constitute a mechanism of Scott Russell. In the present embodiment, the L-shaped members 5a and 5b have an accurate L-shape with a bending angle of 90 degrees, but do not necessarily have to have an accurate L-shape.

Next, the operation of the present embodiment configured as described above will be described. 2, 3, 4, and 5 are explanatory diagrams for explaining the operation of the present embodiment. 2 shows a state where the seat 1 is lowered most, FIG. 3 shows a state where the seat 1 is slightly elevated from the state of FIG. 2 (intermediate state 1), and FIG. 4 shows a state where the seat 1 is lower than the state of FIG. FIG. 5 shows a state where the seat 1 is further raised slightly (intermediate state 2), and FIG.

As can be seen from FIGS. 2 to 5, in this embodiment, when the seat 1 is raised, the telescopic drive device is driven in the contracting direction to pull the one end of the short side of the L-shaped members 5a, 5b. Apply a load. When a tensile load is applied, the L-shaped members 5a and 5b rotate around the bent portion as a fulcrum,
It acts to cause the support members 2a, 2b attached to one end of the long side of the L-shaped members 5a, 5b. When such a force acts on the support members 2a and 2b, the support members 2a and 2b
When the connecting members 3a and 3b, to which one end of the supporting member 2b is attached, slide toward the center of the seat 1, the supporting member 2
a, 2b are caused by the L-shaped members 5a, 5b. At this time, the support members 2a, 2b and the support members 4a, 4
b perform a parallel movement, and the movement of the connecting members 3a and 3b is restricted in the horizontal direction, so that a smooth movement can be realized. With such an operation, the seat 1 is shown in FIGS.
And gradually ascends to the uppermost position shown in FIG.

On the other hand, when the seat 1 is lowered, the telescopic drive device is driven in the extension direction from the uppermost position shown in FIG. 5, thereby performing the reverse operation, that is, the operation from FIG. 5 to FIG. What should I do?

Next, in order to clarify the difference from the prior art, the inventor modeled and theoretically analyzed the embodiment shown in FIG. FIG. 6 is a diagram in which the present embodiment is modeled. In the drawing, L is the link length (support members 2a, 2a).
b), y is the height of the seat, x is the length of the telescopic drive, M is the weight of the seat, A is the length of the long side of the L-shaped member, and A = 1 / 2L. It is. B is the length of the short side of the L-shaped member, C is the horizontal distance from one end of the telescopic drive to the bending point of the L-shaped member, α is the bending angle of the L-shaped member, θ is the long side of the L-shaped member and the base Shows the angle formed by When the load F applied to the telescopic drive device and the elevating speed V of the seat are obtained using the analysis model shown in FIG. However,
X _n In Equation 3, y _n indicate that he or she dimensionless by L, V _x represents the expansion and contraction speed of the telescopic drive.

[0032]

(Equation 3)

Equation 3 is made dimensionless by the applied load M (F
_n = F / M), the elevating speed V
_x dimensionless (V _n = V / V _x ), and normalized load F
_{When n} and the normalized lifting / lowering speed V _n are obtained, the following Expression 4 is obtained.

[0034]

(Equation 4)

In particular, when α = 1 / 2π, the applied load |
F | and the vertical speed | V | are as follows. | F | = M (1 / 2B _n ) = M (L / 2B) (1) | V | = V _x (1 / 2B _n ) = V _x (L / 2B) (2) As can be seen from the expressions 1) and (2), when the telescopic drive device is driven at a constant speed, the lift speed V of the seat is constant, and the load F applied to the telescopic drive device is constant and equal to the tensile load. Become.

FIG. 7 is a graph expressing the above equations (1) and (2). In this graph, the horizontal axis is the height of the seats divided by the link length (normalized height)
Is shown. The vertical axis represents the value obtained by dividing the load applied to the telescopic drive by the weight of the seat 1 (normalized load).
And a value obtained by dividing the elevating speed of the seat 1 by the elongating speed of the telescopic drive (normalized elevating speed). The broken line indicates the elevating speed of the seat 1, and the solid line indicates the load applied to the telescopic drive.

As can be seen from this graph, the load applied to the telescopic drive and the vertical speed of the seat 1 are constant regardless of the elevation height, and the load applied to the telescopic drive is the weight of the seat 1. The lifting speed of the seat 1 is about twice as high as that of the telescopic driving device.

As described above, in this embodiment, the seat 1 can be raised and lowered by using only one telescopic drive device, so that complicated control is not required and the manufacturing cost is reduced. In addition, since a tensile load is always applied to the telescopic drive device, there is no fear of buckling. Therefore, when a cylinder device is used as the telescopic drive device, the cylinder diameter can be reduced. Also, a winch or chain device can be used as the telescopic drive device. Further, in the present embodiment,
When the seat 1 is moved up and down, the vertical speed of the seat 1 and the drive power applied to the telescopic drive unit are constant, and there is no need to control the speed of the drive motor and the like in a complicated pattern. Further, even when the seat 1 is in a prone position, a large load is not applied to the telescopic drive device. Therefore, a drive motor or a speed reducer to cope with a high load load as in the prior art is required. And not. Hereinafter, specific examples will be described.

Embodiment 2 FIG. 8 is a perspective view of another embodiment of the present invention, and FIG. 9 is an enlarged view of a main part of FIG. In the figures, the same or corresponding parts as those shown in FIGS. 1 to 5 are denoted by the same reference numerals. The second embodiment is different from the first embodiment in that the retractable driving unit 6 is replaced with the winding driving unit 1.
00 is used. Each of the L-shaped members 5a and 5b in the present embodiment is composed of two L-shaped members arranged at a predetermined distance from each other, and a shaft member 100a for connecting the two L-shaped members at a tip end thereof. , 100b are provided respectively. The shaft member 100a is provided with wheels 104 and 105 for receiving a wire 101 described later, and the shaft member 103 is provided with a wheel 103 for receiving the wire 101. Also, the shaft member 100
b, a driving means 102 for winding the wire 101
Is installed. One end of the wire 101 is connected to the shaft member 10.
0b, and then wheel 10
4. The wire is sequentially wound around the wheel 103 and the wheel 105, and the other end of the wire is attached to the driving means 102. The hoisting drive means 100 includes shaft members 100a, 1
00b, wire 101, driving means 102 and wheel 1
03, 104, and 105.

Next, the operation of the second embodiment configured as described above will be described. When raising the seat 1, the driving means 102 is driven to wind the wire 101. Thereby, the horizontal distance between the shaft members 100a and 100b is shortened, and by the same movement as when the expansion / contraction drive unit 6 in the first embodiment is driven in the reduction direction,
The seat 1 rises. Conversely, when lowering the seat 1, by driving the driving means 102 in the unwinding direction of the wire 101, the horizontal distance between the shaft members 100a and 100b becomes longer, and the seat 1 is lowered.

In this embodiment, the case where the number of wheels receiving the wire 101 is three has been described. However, the number of wheels is not necessarily three, and the number of wheels may be increased. The smaller the force required when the driving means 102 winds the wire 101, the smaller the force required. For example, assuming that the number of wheels is n _w , the tensile load applied to the driving means 102 is smaller than that of the case where the telescopic driving means 6 shown in Embodiment 1 is provided between the shaft members 100a and 100b. From 1 / (n _w +1) times. Therefore, the specification of the driving means 102 can be designed to have a small tensile load. As a result, the driving means 102 can be downsized, the installation space can be reduced, and the cost can be reduced.

In the present embodiment, the example in which the driving means 102 is installed on the shaft member 100b has been described. However, as long as the wire 101 can be wound or pulled, the driving means 102 It may be installed anywhere.

In the present embodiment, an example is shown in which the driving force of the driving means 102 is reduced by utilizing the principle of a moving pulley. For example, one end of the wire 101 is connected to the shaft member 10.
0a, and the other end side may be wound by the driving means 102 attached to the shaft member 100b. In this case, the effect of reducing the driving force of the driving means 102 cannot be obtained, but even if the distance between the shaft members 100a and 100b changes, it can be handled simply by adjusting the length of the wire 101, so that it is convenient. It is.

[0044]

【Example】

Embodiment 1 FIG. FIGS. 10 and 11 are explanatory views for explaining one embodiment of the present invention. FIG. 10 shows a state where the seat is at the highest position, and FIG. 11 shows a state where the seat is at the lowest position. I have. This embodiment has substantially the same mechanism as that shown in FIG. 1 of the above-described embodiment. In FIGS. 10 and 11, portions corresponding to FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. Only the required dimensions are described. In FIG. 10, 10
Denotes a drive cylinder, which is a telescopic drive device 6 in the embodiment.
Is equivalent to Reference numeral 11 denotes an electric motor for extending and retracting the drive cylinder 10. Reference numerals 12a and 12b are rails mounted on the base, and rollers mounted on the connecting members 3a and 3b can move left and right on the rails 12a and 12b.

Next, specific dimensions will be described. Length L of supporting members 2a, 2b, 4a, 4b = 4000m
m, length of connecting member 3a, 3b 2000 mm, length B of short side of L-shaped members 5a, 5b = 1000 mm, length of long side 2000 mm, weight of seat 1 M = 10t, undulating length of seat It is set to 3600 mm. In addition, the driving speed of the driving cylinder 10 was set to 10 mm / s, and the raised / lowered seat was operated. The operation and effect of this embodiment are the same as those of the embodiment.

Embodiment 2 FIG. FIGS. 12 and 13 are explanatory views for explaining another embodiment of the present invention. FIG. 12 shows a state where the seat is at the highest position, and FIG. 13 shows a state where the seat is at the lowest position. ing. In this embodiment, the support members 4a and 4b and the connection members 3a and 3
b, the drive cylinder 10 and the L-shaped member 5b
And the connecting member 13 is interposed between them. Other configurations are the same as those of the first embodiment shown in FIGS. 10 and 11, and the same portions are denoted by the same reference numerals and description thereof will be omitted.

According to this embodiment, the number of members to be used can be reduced, and the cost can be reduced.

Embodiment 3 FIG. FIGS. 14 and 15 are explanatory views for explaining another embodiment of the present invention. FIG. 14 shows a state where the seat is at the highest position, and FIG. 15 shows a state where the seat is at the lowest position. ing. In this embodiment, the L-shaped members 5a and 5b of the first embodiment are omitted, and
L-shaped support members 15a and 15b are provided in place of the support members 4a and 4b, and support members 16 for supporting the support members 4a and 4b are provided.
a, 16b. Describing in more detail, the L-shaped support members 15a, 15b are rotatably attached at one ends of the long sides to the connecting members 3a, 3b, and rotatably attached at the bent portions to the viewing seat 1, and further have short sides. Are connected via a drive cylinder 10 and a connecting member 13. One end of each of the support members 16a and 16b is rotatably attached to the center in the longitudinal direction of the support members 2a and 2b, and the other end is rotatably attached to the base and outside the connecting members 3a and 3b. ing. Further, the connecting member 3
a and 3b can be moved in the horizontal direction on the rail 12 installed on the base.

The dimensions of each member configured as described above will be described. Length L of long side of L-shaped support members 15a, 15b =
The length of the short side is 4000 mm, the length B of the short side is 1000 mm, the length L1 of the supporting members 16a and 16b is 2000 mm, and the dimensions of the other members are the same as those in the first embodiment. In the present embodiment, the L-shaped support members 15a and 15b have an accurate L-shape, but need not necessarily have an accurate L-shape.

According to the present embodiment, the drive cylinder 10 can be arranged on the seat 1 side, and when the seat 1 is raised, the drive cylinder 10 or the electric motor 11 does not hit the base. The effect of increasing the degree of freedom of the shape such as 10 can be obtained.

Embodiment 4 FIG. FIGS. 16 and 17 are explanatory views for explaining another embodiment of the present invention. FIG. 16 shows a state where the seat is at the highest position, and FIG. 17 shows a state where the seat is at the lowest position. ing. In the drawing, reference numeral 1 denotes a seat similar to that of the first embodiment, and reference numerals 20a and 20b denote a pair of L-shaped support members arranged opposite to the lower portion of the seat 1 such that one end of a long side is slidable to the seat 1. The bending part is attached to the base (or the body frame) so as to be rotatable. Reference numerals 21a and 21b denote rollers provided at one end of the long sides of the L-shaped support members 20a and 20b. The rollers 21a and 21b can move horizontally on rails 22a and 22b provided at the lower part of the seat 1.

Reference numerals 23a and 23b denote a pair of support members disposed opposite to the lower part of the seat 1 such that one end thereof is rotatable to a position inside the support point of the L-shaped support members 20a and 20b in the seat 1. The other end is slidably mounted on rails 25a and 25b provided on a base (or main body frame). Reference numerals 24a and 24b denote rollers provided at the other ends of the support members 23a and 23b, and the rollers 24a and 24b can slide horizontally on the rails 25a and 25b. Rail 25
a and 25b are disposed at positions outside the turning point of the L-shaped bent portions of the L-shaped support members 20a and 20b, and therefore, the L-shaped support members 20a and 20b and the support members 23a and 23b are provided.
Cross and are rotatably pinned at their respective centers.

Reference numeral 10 denotes a driving cylinder, 11 denotes an electric motor for driving the driving cylinder, and 13 denotes a connecting member 13. The arrangement of these members is the same as that of the second embodiment shown in FIG. Note that the seat 1 is provided with a space for housing the L-shaped support members 20a and 20b and the driving cylinder 10 and a storage space for the seat when the seat 1 is turned down. Same as 1.

The relationship of the length of each member in this embodiment is shown. Length of long side of L-shaped support members 20a, 20b L = 40
00 mm, length B of short side of L-shaped support members 20a, 20b
= 1000 mm, length L2 of support members 23a, 23b =
The size of the seat 1 is 4000 mm, the weight of the seat 1 is 10 t, and the undulation length of the seat 1 is 3600 mm. Then, the driving speed of the driving cylinder 10 was set to 10 mm / s, and the up-and-down-type seat was operated.

According to this embodiment, the overall structure can be simplified and the number of members used can be reduced, so that the cost can be reduced.

Embodiment 5 FIG. FIGS. 18 and 19 are explanatory views for explaining another embodiment of the present invention. FIG. 18 shows a state where the seat is at the highest position, and FIG. 19 shows a state where the seat is at the lowest position. ing. This embodiment is the same as the first embodiment except that stoppers 30a and 30b are provided, and the other configuration is the same as that of the first embodiment. Stopper 3
Reference numerals 0a and 30b are provided below the short sides of the L-shaped members 5a and 5b, and the rotation angle of the L-shaped members 5a and 5b is regulated to make the viewing seat 1 horizontal when the viewing seat 1 is at the uppermost position. Is to do so. An inclined surface is formed on the upper surfaces of the stoppers 30a and 30b, and the angle of the inclined surface is such that the short sides of the L-shaped members 5a and 5b should form a base when the seat 1 rises to the uppermost position. Is set. Therefore,
When the seat 1 is raised, the short sides of the L-shaped members 5a, 5b may be reduced by the stoppers 30a, 30b even when the seat 1 is not horizontal at the uppermost position due to an error or distortion of the mechanism. Since the seat is restricted to a predetermined angle with respect to the base, the seat 1 can be leveled.

In this embodiment, the example in which the stopper is provided in the first embodiment is shown. However, in the other embodiments, the rotation angle of the L-shaped member or the support member is regulated similarly to this embodiment. By providing the stopper, the same effect as in the present embodiment can be obtained.

Embodiment 6 FIG. 20 to 22 are explanatory views for explaining another embodiment of the present invention. FIG. 20 shows a state where the seat 1 is at the highest position, and FIG. 21 is an enlarged view of a main part in FIG. FIG. 22 shows a state where the seat 1 is at the lowest position. This embodiment is the same as the sixth embodiment except that the stopper position adjusting devices 110a and 110b are provided in the sixth embodiment. In the figure, reference numerals 110a and 110b denote stopper position adjusting devices installed on a base, and 111a and 111b denote stoppers similar to the stoppers 30a and 30b shown in the fifth embodiment. It is installed as possible.

The functions of the stoppers 111a and 111b themselves are the same as those of the stoppers 30a and 30b shown in the fifth embodiment. The stopper position adjusting devices 110a and 110b are shown in FIG.
As shown in (1), the back surfaces of the stoppers 111a and 111b are supported by screw members abutting against the back surfaces of the stoppers 111a and 111b, and the positions of the stopper members 111a and 111b are adjusted by adjusting the positions of the screw members in the left-right direction. It is a structure to adjust.

According to this embodiment, when the seat 1 is raised, the seat 1 is not horizontal at the uppermost position due to the influence of an error or distortion of the mechanism, and the height of the uppermost position is the specified height. Even in such a case, the position of the stopper position adjusting device 110 may be set at the site where the raised-type grandstand is installed.
By adjusting the positions of the stoppers 111a and 111b using the a and 110b, the horizontality and the height of the uppermost position of the up-and-down seat can be easily adjusted.

Embodiment 7 FIG. FIGS. 23 and 24 are explanatory views for explaining another embodiment of the present invention. FIG. 23 shows a state where the seat is at the highest position, and FIG. 24 shows a state where the seat is at the lowest position. ing. This embodiment is different from the first embodiment in that a buffer member 115 is provided, and the other configuration is the same as that of the first embodiment. The cushioning member 115 is formed of a link, and the distal end of the L-shaped member 5b and the drive cylinder 1
It is installed via a pivot point 116 between the front end of the camera and the front end of the motor.

When the seat 1 is at the lowest position and the drive cylinder 10 is further extended, FIG.
As the rotation point 116 moves downward as indicated by the one-dot chain line, the drive cylinder 10 and the L-shaped members 5a, 5
b and the supporting members 2a, 2b are not subjected to an axial force. Therefore, the life of the drive cylinder 10, the L-shaped members 5a and 5b, and the support members 2a and 2b can be extended. Also,
The buffer member 115 can buffer the impact applied to each link constituting the drive mechanism at the beginning of the rise of the seats and at the end of the descent, so that a smooth lifting operation can be performed. In this embodiment, an example in which a link member is used as the buffer member 115 has been described. However, the present invention is not limited to this, and a wire or the like may be used.

Embodiment 8 FIG. FIGS. 25 and 26 are explanatory views for explaining another embodiment of the present invention. FIG. 25 shows a state where the grandstand is at the highest position, and FIG. 26 shows a state where the grandstand is at the lowest position. ing. In this embodiment, L of Embodiment 1 is used.
Instead of the shaped members 5a, 5b, L-shaped members 120a, 12
0b is provided, and the other configuration is the same as that of the first embodiment. A feature of the L-shaped members 120a and 120b of this embodiment is that the angle of the bent portion is an acute angle (75 ° in this embodiment). L-shaped members 120a, 120b
Is a long side having a length of 2000 mm, a short side having a length of B = 800 mm, and an angle of the bent portion being 75 °.

By the way, it is desired that the height of the spectator seat 1 in the state where the spectator seat 1 is at the lowest position in the undulating type spectator seat is low, but the height of the spectator seat 1 in this state is an L-shaped member. Is determined by the length of the short side of. That is, as the length of the short side of the L-shaped member is reduced, the height of the state where the seat 1 is at the lowest position can be reduced. However, when the length of the short side of the L-shaped member is reduced, the height of the short side end of the L-shaped member from the ground when the seat 1 is at the highest position is reduced, and as a result, the drive cylinder 10 The electric motor 11 comes into contact with the ground. Therefore,
In the present embodiment, the bent portions of the L-shaped members 120a and 120b are formed at an acute angle (75 ° in the present embodiment), so that the short-side end of the L-shaped member from the ground in a state where the seat is at the highest position. The height is increased so that the electric motor 11 does not contact the ground. Therefore,
According to the present embodiment, the height of the grandstand 1 can be reduced when the grandstand 1 is at the lowest position in the undulating type grandstand, and the electric motor 11 is connected to the ground with the grandstand 1 at the highest position. Contact can be prevented. The angle of the bent portion is not limited to 75 °, but can be changed within an acute angle range depending on other design factors.

Embodiment 9 FIG. FIGS. 27 and 28 are explanatory views for explaining another embodiment of the present invention. FIG. 27 shows a state where the seat is at the highest position, and FIG. 28 shows a state where the seat is at the lowest position. ing. In the present embodiment, one end is rotatably mounted outside the turning point of the pair of support members 4a and 4b in the lower part of the seat 1, and the other end is connected to the one shown in the eighth embodiment. A pair of support members 125a, 125a, connected to the lower ends of the support members 4a, 4b via the
125b, and the other configuration is the same as that of the eighth embodiment.
Is the same as The length of the support members 125a and 125b is 4000 mm. Support members 125a, 125
By adding b, even when the length of the width direction (left-right direction in the figure) of the seat is longer than that of the undulating seat of the eighth embodiment, the seat 1 is parallel to the ground. Can be moved up and down. In the present embodiment, the number of the added support members is one (pair) for each of the left and right sides.

Embodiment 10 FIG. FIGS. 29 and 30 are explanatory views for explaining an embodiment of the present invention. FIG. 29 shows a state where the seat is at the highest position, and FIG. 30 shows a state where the seat is at the lowest position. I have. In this embodiment, FIGS.
A winch 106 is used as a specific example of the driving means 102 according to the second embodiment shown in FIG. The dimensions of the supporting member and the L-shaped member are the same as those of the eighth embodiment.

[0067]

As described above, according to the present invention, one end is rotatably attached to the lower part of the seat, and the other end is provided.
Is slidably mounted on the base on the base,
A pair of support members for supporting the seat,
One end of the holding member
Is set to half the length of the support member, and the bent portion
Are a pair of L-shaped portions rotatably mounted on the base.
Material, both ends are configured to be stretchable, and the both ends are
Telescopic drive means interposed between the other ends of a pair of L-shaped members
And expanding and contracting both ends of the expansion / contraction drive means.
Therefore, the pair of support members are set at a pivot point with respect to the seat.
Pivoted to move the seat up and down
Therefore, the following effects can be obtained. That is, the seat can be raised and lowered by using only one expansion / contraction drive unit, and the structure is simplified, so that complicated control is not required.
Manufacturing costs can be reduced.

Further, since only the tensile load is applied to the expansion / contraction drive means and no compression load is applied, there is no possibility of buckling of the expansion / contraction drive means. For example, when a cylinder device is used as the expansion / contraction drive means, the cylinder diameter is reduced. The thickness can be reduced, and the manufacturing cost can be reduced. Furthermore, since only a tensile load is applied, a winch and a chain device can be used as the expansion / contraction drive means in addition to the cylinder device, and the specifications of the applicable expansion / contraction drive means are widened.

Further, according to the sixth aspect of the present invention, provided with a stopper for defining the rotation angle of the bleachers upward of L-shaped member, further comprising means for adjusting the predetermined position of the rotation angle to the stopper So, at the site where the bleachers are set up,
You can easily adjust the level and height at the top of the raised and lowered seats.

Further, according to the seventh aspect of the present invention, L
Since the cushioning member is provided between at least one of the connecting portions between the one end of the shaped member and the telescopic driving means, it is possible to prevent an impact force from being generated between the L-shaped member and the telescopic driving means at the start of the rise of the seat. It is possible to prevent the unnecessary axial force from acting on the L-shaped member at the end of the lowering of the seat, and to prolong the life of the L-shaped member and the support member.

According to the eighth aspect of the present invention, each L
Since the bending angle of the bent portion of the shaped member is made acute, the height of the seat in the state where the seat is at the most lowered position can be lowered, and the telescopic drive means is connected to the ground in the state where the seat is at the highest position. Contact can be prevented.

Further, according to the ninth aspect of the present invention, one end of the support member is rotatably mounted outside the pivot point of the pair of support members in the lower part of the viewing seat, and the other end of the support member is connected via the connecting member. Since a plurality of pairs of support members are provided at the other end to form a parallel motion mechanism together with the support members, even when the width of the seat is increased in the width direction, the seat and the base are made parallel. be able to.

According to the tenth aspect of the present invention, instead of the expansion / contraction drive means, a wire for connecting one end of each of the pair of L-shaped members and a winding means for winding up the wire are provided. Even if the installation interval of the L-shaped member changes, it can be handled only by adjusting the length of the wire.
The design of the bleachers becomes easier.

Further, according to the eleventh aspect of the present invention,
One end of the wire is attached to one end of the pair of L-shaped members, and the other end is wound around a wheel rotatably mounted on at least the other end of the pair of L-shaped members. The load acting on the hoisting means can be reduced by the pulley principle, and the hoisting means can be miniaturized.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram of an operation of the embodiment shown in FIG.
(Lowest state)

FIG. 3 is an explanatory diagram of an operation of the embodiment shown in FIG. 1;
(Intermediate state 1)

FIG. 4 is an explanatory diagram of an operation of the embodiment shown in FIG. 1;
(Intermediate state 2)

FIG. 5 is an explanatory diagram of the operation of the embodiment shown in FIG. 1;
(Upmost state)

FIG. 6 is an explanatory diagram of a model for theoretical analysis of the embodiment shown in FIG. 1;

FIG. 7 is a performance evaluation graph of an up-and-down seat according to the present invention.

FIG. 8 is a schematic view of another embodiment of the present invention.

FIG. 9 is an enlarged view of a main part of FIG. 8;

FIG. 10 is an explanatory diagram of the first embodiment of the present invention. (Upmost state)

FIG. 11 is an explanatory diagram of the first embodiment of the present invention. (Lowest state)

FIG. 12 is an explanatory diagram of Embodiment 2 of the present invention. (Upmost state)

FIG. 13 is an explanatory diagram of Embodiment 2 of the present invention. (Lowest state)

FIG. 14 is an explanatory diagram of Embodiment 3 of the present invention. (Upmost state)

FIG. 15 is an explanatory diagram of a third embodiment of the present invention. (Lowest state)

FIG. 16 is an explanatory diagram of Embodiment 4 of the present invention. (Upmost state)

FIG. 17 is an explanatory diagram of Embodiment 4 of the present invention. (Lowest state)

FIG. 18 is an explanatory diagram of Embodiment 5 of the present invention. (Upmost state)

FIG. 19 is an explanatory diagram of Embodiment 5 of the present invention. (Lowest state)

FIG. 20 is an explanatory diagram of Embodiment 6 of the present invention. (Upmost state)

FIG. 21 is an enlarged view of a main part of FIG. 20;

FIG. 22 is an explanatory diagram of Embodiment 6 of the present invention. (Lowest state)

FIG. 23 is an explanatory diagram of Embodiment 7 of the present invention. (Upmost state)

FIG. 24 is an explanatory diagram of Embodiment 7 of the present invention. (Lowest state)

FIG. 25 is an explanatory diagram of Embodiment 8 of the present invention. (Upmost state)

FIG. 26 is an explanatory diagram of Embodiment 8 of the present invention. (Lowest state)

FIG. 27 is an explanatory diagram of Embodiment 9 of the present invention. (Upmost state)

FIG. 28 is an explanatory diagram of Embodiment 9 of the present invention. (Lowest state)

FIG. 29 is an explanatory diagram of Embodiment 10 of the present invention. (Upmost state)

FIG. 30 is an explanatory diagram of Embodiment 10 of the present invention. (Lowest state)

FIG. 31 is an explanatory diagram of a conventional example.

FIG. 32 is an enlarged view of a part of the conventional example shown in FIG.

FIG. 33 is an explanatory diagram of a conventional model for theoretical analysis.

FIG. 34 is a performance evaluation graph of an up-and-down seat of the prior art.

[Explanation of symbols]

1 Grandstands 2a, 2b, 4a, 4b, 16a, 16b, 23a, 2
3b, 125a, 125b Support member 3a, 3b Connection member 5a, 5b, 120a, 120b L-shaped member 6 Telescopic drive unit 10 Drive cylinder 11 Electric motor 12a, 12b Rail 13 Connecting member 15a, 15b, 20a, 20b L-shaped support member DESCRIPTION OF SYMBOLS 101 Wire 102 Driving means 103, 104, 105 Wheel 110a, 110b Stopper position adjusting device 111a, 111b Stopper 115 Buffer member

Continuing from the front page (72) Inventor Kazunari Nuka 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Kenichi Murano 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (56) References JP-A-4-11871 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04H 3/12 A47C 1/12-1/126

Claims (11)

(57) [Claims] 1. A pair of support members, one end of which is rotatably attached to a lower part of a seat and the other end is slidably mounted on a base, and which supports the seat, When pivotally connected to the intermediate point of the support member
In both cases, the length of the one end side is set to half the length of the support member.
The bend is pivotally mounted on the base
A pair of L-shaped members and both ends are configured to be expandable and contractable , and both ends are the pair of L-shaped members .
Telescopic drive means interposed between the other ends of the L-shaped members.
The up- and-down-type viewing device, characterized in that the pair of support members are turned around a turning point with respect to the viewing seat by extending and contracting both end portions of the expansion / contraction driving means, and the viewing seat is driven up and down. Seat drive mechanism. 2. An end is rotatably mounted outside a pivot point of the pair of support members at a lower portion of the viewing seat,
The other end is connected to the other end of the support member via a connecting member having a length equal to the distance between the pivot point and the pivot point of the support member, and is configured to be slidable together with the other end of the support member. A second supporting member is provided.
2. The driving mechanism of the raised / lowered seat according to 1 . 3. One end is rotatably attached to the lower part of the seat.
And the other end is slidably mounted on the base
And a pair of support members for supporting the seat and a bent portion are rotatably attached to a lower portion of the seat.
And the length of one end side is set to the same length as the support member.
The one end is pivoted between the pivot point of the support member and the bent portion.
Said support member via a connecting member of a length equal to the distance of the point
To be slidable with the other end of the support member
A pair of configured L-shaped members and both ends are configured to be expandable and contractable , and the both ends are the pair of L-shaped members .
Telescopic drive means interposed between the other ends of the L-shaped members.
By expanding and contracting both ends of the expansion and contraction drive means,
The pair of support members are pivoted about a pivot point with the seat.
And a driving mechanism for raising and lowering the seats . 4. One end is rotatably attached to the lower part of the seat.
And the other end is slidably mounted on the base
And a pair of support members for supporting the seat and a bent portion are rotatably mounted on the base.
The length of one end side is set to the same length as the support member,
One end and an intermediate point between the support members are rotatably connected,
And one end slidably attached to the lower part of the seat
A pair of L-shaped members, and both ends thereof are configured to be extendable and contractable,
Telescopic drive means interposed between the other ends of the L-shaped members.
By expanding and contracting both ends of the expansion and contraction drive means,
The pair of support members are pivoted about a pivot point with the seat.
And a driving mechanism for raising and lowering the seats . 5. The drive mechanism of the undulating type bleachers according to any one of claims 1 to 4, characterized in that a stopper for defining the rotation angle of the bleachers rising direction of the L-shaped member . 6. A block member which is slidably mounted on the base and abuts on a lower side of a connection side piece of the L-shaped member with the expansion / contraction drive means, and the connection side piece of the block member. claim, characterized by comprising an adjustment means for adjusting the contact position with respect to 5
The driving mechanism of the raised / lowered seats described. 7. A relief formula according to any one of claims 1 to 6, characterized in that a buffer member between at least one coupling portion between the one end and the telescopic drive means of said L-shaped member The drive mechanism of the bleachers. 8. The driving mechanism of the undulating type bleachers according to any one of claims 1 to 7, characterized in that the bending angle of the bent portion of the L-shaped member is at an acute angle. 9. One end is rotatably mounted outside the pivot point of the pair of support members below the viewing seat,
Claims 1, 3 to 8, characterized in that the other end provided with a plurality of pairs supporting member constituting the parallel motion mechanism with the support member being connected to the other end of the support member via a connecting member
The drive mechanism of the raised / lowered seat according to any one of the above. 10. Instead of the telescopic drive means, and a wire for connecting one end of each of the pair of L-shaped member, according to claim 1, characterized in that a hoisting means winding up the wire
10. The driving device for an up-down seat according to any one of claims 9 to 9 . 11. A wheel having one end attached to one end of the pair of L-shaped members and the other end rotatably mounted on at least the other end of the pair of L-shaped members. The driving device for an up-and-down seat according to claim 10, which is wound around the seat.