JPH0431952Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to movable spectator seats that can be used both as spectator seats and as a floor in a multipurpose hall.

(Prior art) In order to make effective use of the floor in a multipurpose hall, the seats are moved and the number of seats is increased or decreased depending on the number of people using the hall or the purpose of use. There are known devices that can be used.

This type of seating is constructed by folding chairs that are arranged side by side in a step-like pattern that descends forward, and then storing the tiered floor that supports these chairs in a nested manner under the rear tiered floor. It is known that this was done.

(Problem to be solved by the invention) The nesting chairs as described above are ultimately folded up and accommodated along the wall, but ultimately the folded seats and the way they are brought in and out are No equivalent floor space is available for mobile equipment for
As a result, the floor space becomes smaller.

Therefore, it is conceivable to attach the chairs to the lower surface of the elevating floor so that the entire floor can be used when the chairs are accommodated.

However, when installing the chair on the underside of the elevating floor, the installation space is small;
It is required to be easy to construct, inexpensive, and easy to repair and inspect. Therefore, there is a desire for a movable seating area that satisfies these conditions.

(Means for Solving the Problems) A movable bleacher seat equipped with a parallel movement mechanism according to the present invention includes a hollow oblong box-shaped step bed having an opening on the top surface;
The base is raised and lowered in parallel by the upper ends of a base provided in the step floor so as to be freely raised and lowered, and a pair of front and rear support arms that intersect in an X shape and whose central parts are pivoted about a horizontal axis. a parallel movement mechanism supported in a parallel movement mechanism; a rotation means for rotating the support arm of the parallel movement mechanism around the horizontal axis; The above requirements can be met by providing viewing seats that can be sunk into the stepped floor when not in use.

(Example) Hereinafter, the first example of the present invention will be explained as shown in Figs. 1 and 2.
This will be explained based on the diagram.

(1) is a horizontally elongated hollow box-shaped tiered floor, many of which are arranged side by side in the front-rear and left-right directions, and their upper surfaces form a floor.

Each step bed 1 is supported by a lifting means (not shown), and can be arranged, for example, in the form of a staircase with a higher step at the rear.

A horizontally long rectangular opening 2 is provided at the rear of the upper surface of the stepped floor 1, and guide plates 1a, 1a facing downward are provided at the front and rear edges of this opening 2.

The lower edge of a horizontally long rectangular cover plate 3 is pivotally attached to the upper side of the rear edge of the opening 2, and covers the opening 2 so as to be openable and closable.

A floor plate 4 is provided on the upper surface of the stepped floor 1 excluding the opening 2, and is flush with this to form a floor surface when the lid plate 3 is closed.

Reference numeral 5 denotes a base having a horizontally elongated rectangular frame shape in plan view, which is slightly smaller than the opening 2, and has a front groove member 5a facing rearward.
, a rear groove member 5b facing forward, and both groove members 5
A plurality of connecting rods 5c in the front-rear direction connecting a and 5b
and sliding rods 5d hanging down from the four corners, and the top opening of the base 5 is connected to the cover plate 6.
is blocked by.

Reference numeral 7 denotes a guide member, that is, an underframe, provided on the bottom surface of the step bed 1 facing the base 5, and the front and back width is the same as the base 5, and the left and right width is shorter than the base 5. The front groove member 7 has a rectangular frame shape in plan view and faces rearward.
A and the rear groove member 7b facing forward are connected to a plurality of connecting rods 7.
It is formed by connecting with c.

Reference numeral 8 denotes a parallel movement mechanism, which moves two support arms 9, 9 which are crossed and overlapped so that they form an X shape when viewed from the front.
A pair of common horizontal shafts 10 are arranged in the front and rear, and pass through the central intersection of the support arms 9, 9 in the front and rear direction.
By pivoting the support arms 9 with the support arms 9, the upper and lower ends 9a and 9b of each support arm 9 can be freely expanded in the left-right direction.

Upper and lower ends 9 of support arm 9 facing front and rear
A total of four support shafts 11, which pass through a and 9b, top, bottom, left and right
A wheel 1 is attached to the outer end projecting from the support arm 9 of the
2 is pivotally mounted.

The upper wheels 12, 12 are connected to the front groove member 5 of the base 5.
The lower wheels 12, 12 are fitted into the front groove member 7a and the rear groove member 7b of the underframe 7 so as to be rotatable, respectively. ing. Thus, the base 5 can be easily translated vertically by raising and lowering the support arms 9, 9.

Reference numeral 13 denotes a screw rod facing in the vertical direction, the lower end of which is pivotally supported by a bearing 14 provided in the center of the front groove member 7a of the underframe 7, and the intermediate part is pivotally supported by the horizontal shaft 10. It is screwed into a fixing nut 16 that is integral with the attached bracket 15. This fixing nut 1
6 and the threaded rod 13 form a rotation means 17 for operating the parallel movement mechanism 8.

An engagement groove 13a is cut into the upper end surface of the screw rod 13. When the opening/closing lid 6a provided on the cover plate 6 is opened, the lower end of the handle (not shown) is inserted into the engagement groove 13.
When engaged with a, the threaded rod 13 can be rotated manually.

Reference numeral 18 denotes a viewing seat consisting of six chairs 20 arranged on the left and right, and is attached to the upper surface of the base 5.

This spectator seat 18 includes a frame 19 consisting of a left-right horizontal rod 19a attached to the base 5, and a plurality of vertical rods 19b erected at equal intervals from the horizontal rod 19a. In between, a chair 20 consisting of a back plate 20a and a seat plate 20b is provided so as to be foldable forward. Since such a front-foldable bleacher seat 18 is a common type, its explanation will be omitted.

When the screw rod 13 is rotated forward using a handle (not shown), the horizontal shaft 10 rises and the support arms 9,
9 moves in the closing direction, and the base 5 rises.

In the raised position of the base 5, the back plate 20a and seat plate 20 of the chair 20 are
b can be opened and used.

When the screw rods 13 are reversed, the support arms 9, 9 are expanded, and the base 5 is lowered to the position shown by the imaginary line in FIG. becomes.

After storing the bleachers 18 and closing the cover plate 3,
The upper surface of the stepped floor 1 can be used as a floor.

Instead of manually raising and lowering the bleachers 18 using the rotating means 17, it can be automatically raised and lowered using a driving means such as a motor.

A second embodiment of the present invention will be described with reference to FIGS. 3 and 4. Note that the same parts as in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

Reference numeral 21 denotes a motor serving as a driving means, which is mounted near the right end of the bottom surface of the base 5, facing in the left-right direction;
A screw rod 22 facing left and right is fixed to the output shaft 21a.

A nut 23 is screwed into the threaded rod 22 and fixed to the support shaft 11 that connects the right upper ends of the front and rear support arms 9, 9.

The motor 21, the nut 23, and the screw rod 22 constitute a rotating means 24.

25 is a coil spring as a biasing means for biasing the lower end portions of the support arms 9, 9 in the closing direction;
The left leg piece 25b is hooked to a connecting rod 26 in the front-rear direction at the center of the underframe 7.

When the motor 21 rotates forward, the support arm 9,
9 is closed, and the bleachers 18 are raised to the use position, as shown in FIG. When the motor 21 is reversed, the support arms 9,9 open and the bleachers 18
is accommodated within the step bed 1.

The threaded rod 13 of the rotating means 17 in the first embodiment described above can be raised and lowered automatically by power instead of manually.

Further, instead of the motor in the second embodiment, the screw rod 22 may be turned by hand.

(Effects of the invention) The seats are supported by a parallel movement mechanism consisting of a pair of support arms stacked in an X shape, and the support arms are rotated by a rotation means, so the installation space for the elevating mechanism is small. construction is easy.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional front view showing a first embodiment of the present invention, Fig. 2 is a longitudinal sectional side view taken along the - line in Fig. 1, and Fig. 3 is a longitudinal sectional front view showing a second embodiment of the invention. 4 is a cross-sectional view taken along the - line in FIG. 3. 1... Step floor, 2... Opening, 3... Lid plate, 4...
Floorboard, 5... Base, 5a, 5b... Groove material, 5c...
... Connecting rod, 5d ... Sliding rod, 6 ... Cover plate, 7 ... Underframe, 8 ... Parallel movement mechanism, 9 ... Support arm, 10 ... Horizontal shaft, 11 ... Support shaft, 12
... Wheel, 13 ... Screw rod, 14 ... Bearing, 16
...Fixing nut, 17... Rotating means, 18... Spectator seat, 19... Frame, 20... Chair, 21...
...Motor, 22...Screw rod, 23...Nut,
24... Rotating means, 25... Coil spring (biasing means), 26... Connection rod.

Claims (1)

[Scope of claims for utility model registration] (1) A hollow oblong box-shaped step bed with an opening on the top surface;
The base is raised and lowered in parallel by the upper ends of a base provided in the step floor so as to be freely raised and lowered, and a pair of front and rear support arms that intersect in an X shape and whose central parts are pivoted about a horizontal axis. a parallel movement mechanism that supports the support arm in a parallel movement mechanism, and a rotation means that rotates the support arm of the parallel movement mechanism around the horizontal axis;
A movable bleacher seat equipped with a parallel movement mechanism, characterized in that the bleacher seat is placed on the base, protrudes above the tiered floor when in use, and can sink into the tiered floor when not in use. (2) Registration of a utility model in which the rotating means consists of a nut pivotally attached to the support arm and a screw rod rotatably mounted on either the step floor or the base and screwed into the nut. A movable spectator seat comprising the parallel movement mechanism according to claim (1). (3) A movable spectator seat equipped with a parallel movement mechanism according to claim (2) of the utility model registration, wherein the nut is pivotally supported at the upper end of the support arm. (4) A movable spectator seat equipped with a parallel movement mechanism according to claim (2) of claim 2, wherein the nut is pivotally attached to a horizontal shaft that pivots the support arm.