JPH0447111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present application relates to a drive device for movable bleachers used when temporarily attaching bleachers in a gymnasium or the like.

Conventional Technology Conventionally, in gymnasiums and the like, in order to use the inside of the building for multiple purposes, telescopic movable bleachers are known, which are installed in a retracted state at one corner of a side wall when not in use, and extend to form a grandstand when in use. Furthermore, a drive device for telescopically moving the telescopic seats is also known in US Pat. No. 3,738,612 and Japanese Utility Model Application No. 61-36047.

This known drive device comprises a number of single pieces, each consisting of a rotating drum in the form of a regular polygon, with rollers attached to the outer periphery of the drum in downward U-shaped channels whose length is approximately equal to the length of one side of said rotating drum. A single chain rail connected like a rail by a hinge is wound in a spiral shape, and the rotating drum is rotated by a motor to extend the chain rail,
The movable spectator seat attached to the tip of the chain rail is moved straight on the floor by rolling it up.

Problems to be Solved by the Invention By the way, according to the above-mentioned drive device, by always keeping the extension angle of the chain rail constant as the rotating drum rotates, the tip of the chain rail can be moved perpendicularly to the axis of the rotating drum. Since the rollers that roll on the floor surface and the axes of the hinges that connect the single pieces, each has a feeding angle with respect to the direction perpendicular to the longitudinal direction of the single pieces. Such a mounting, especially for a single piece of rotating roller, is inconvenient in manufacturing, as it is placed in a correspondingly inclined position, and also causes a tortuous movement, and the chain rail is is derived obliquely corresponding to the feeding angle, so an invalid component occurs in the extrusion force,
It requires a large driving force, which is unreasonable; the rollers provided on each single piece are all
Since the rollers roll at different positions on the floor surface, there are drawbacks such as the need to maintain the levelness of the floor structure over a wide range.

Means for Solving the Problem Therefore, in the lower front position of the frame, which extends in the vertical direction of the first invention of the present application and has a spiral guide path formed therein for guiding and storing the chain rail by a guide rail, the above-mentioned A drive mechanism that engages with the chain rail to drive the chain rail to extend and retract it, and a guide rail that guides the chain rail led out from the guide path toward the drive mechanism is provided at a rear position thereof. The second invention extends in the vertical direction and forms a spiral guide path in which the chain rail is guided and stored by a guide rail, and includes an upper frame member, a middle frame member,
At the lower front position of the frame body, which is configured to be separable into a lower frame member, the lower part of the frame body extends in the vertical direction, and has a spiral guide path therein for guiding and storing the chain rail by a guide rail. A drive mechanism that engages with the chain rail and drives the chain rail to extend and retract it is provided, and a guide rail that guides the chain rail led out from the guide path toward the drive mechanism is provided at a rear position thereof. be.

Effect: In the first invention of the present application, when the drive mechanism is driven in one direction, the chain rail is sequentially extended through engagement with the chain rail and moves straight forward, and the chain rail is attached to the tip of the chain rail. The moving bleachers will move forward and extend. When the drive mechanism is driven in the other direction, the chain rail is sequentially retracted and retreated through engagement with the chain rail.
The movable bleachers attached to the tip of the seats are moved backwards and retracted.

Further, in the second invention, an upper frame member, a middle frame member,
A frame body is formed by vertically connecting the lower frame members, and by selecting middle frame members with different heights, chain rails with different overall lengths can be stored.

Embodiments Below, embodiments of the present application will be described in detail with reference to the drawings.
a, a middle frame member 1b, and an upper frame member 1c. and horizontal beams 4 that interconnect these pillars, each pillar 3 has a grounding piece 5 at its lower end, and a grounding piece 5 at its upper end.
Flanges 6 are provided respectively. At the center of the lower front position of the lower frame member 1a configured in this way, a drive mechanism 7, which will be described later and which is fixed on the lower surface of the floor, is installed, and at the left and right sides of the rear position, upper half parts are installed. 8
A guide rail 8, in which a portion a extends vertically and a lower half portion 8b is curved from its lower end and extends in the direction of the drive mechanism 7, is supported by an auxiliary frame 9 consisting of an auxiliary support column 9a and an auxiliary horizontal bar 9b. Furthermore, upwardly curved guide rails 10a and 10b are arranged concentrically at the left and right positions of the upper part by the support rod 11 and the horizontal bar 4.

The middle frame member 1b has four columns 13 connected to each column 3 of the lower frame member 1a by connecting a flange 12 to the flange 6, and a horizontal bar 14 interconnecting these columns. The upper end of each support column 13 is provided with a flange 15.
are provided for each. At the front left and right positions of the middle frame member 1b configured in this way, there are guide rails 1 that extend vertically and whose lower ends face the front ends of the inner guide rail 10a and the outer guide rail 10b, respectively.
6a and 16b extend vertically at the rear left and right positions, and the lower ends are connected to the guide rails 10a,
Guide rails 17a and 17b facing the outer guide rail 10b and the upper end of the guide rail 8, respectively
and 17c are provided, respectively. Upper frame member 1c
By connecting the flange 18 to the flange 15, a cubic shape is formed from the four columns 19 connected to each column 13 of the middle frame member 1b, and the horizontal beams 20 interconnecting them. The upper frame member 1c configured in this way has its front lower end aligned with the guide rail 16a at the left and right positions.
and 16b, and curved guide rails 21a and 21b whose rear lower ends face the upper ends of the guide rails 17b and 17c, respectively, are arranged concentrically by the support rod 22 and the horizontal bar 20. The middle of the outer guide rail 21b is a straight portion 21b'.

In this way, by assembling the frame members 1a, 1b, and 1c by connecting the flanges to form the frame 1, the guide rail forms a spiral guide path and stores the chain rail 22, which will be described later. do.

The drive mechanism 7 is rotatably supported on the left and right side plates of the machine body 25 fixed on the underfloor surface, and has chain wheels 28 and 29 at respective left and right positions of a main drive shaft 26 and a driven shaft 27 that are parallel in the front and rear. Attach the
An endless chain belt 31 made of, for example, synthetic resin and having engaging claws 30 each having a trapezoidal tip disposed at intervals on the outer periphery is stretched between the front and rear facing chain wheels 28 and 29, and A drive motor 32 capable of forward and reverse rotation is mounted on the upper plate of the body 25, and a drive gear 33 provided on its output shaft, and a large diameter gear 34 pivotally attached to the outer end of the main drive shaft 26, It is constructed by being connected by a chain belt 35. As is clear from FIG. 2, the chain rail 22, which is driven and fed out by the drive mechanism 7, is provided on the left and right sides of the downward U-shaped channel member, with the outer side having a small diameter and the inner side facing the underfloor surface. Provided with stepped wheels 36 in contact with each other, and on the upper surface,
An inverted trapezoidal engagement hole 37 that engages with the engagement claw 30
A large number of chain links 38 are connected by hinges 39, and guide rollers 40 are mounted on the lower floor surface of the fuselage body 25 in contact with the lower surface of the chain rail 22 to guide its travel.
Reference numeral 41 denotes a horizontal rod that supports a receiving piece 42 that receives the lower horizontal portion of the chain belt 31 at an inner position.

Note that in the above, the linear guide rails 8a,
16a, 16b, 17a, 17b, 17c and the straight portion 21'b of the guide rail 21b, as shown in FIG. channel member 4
3, and a curved guide rail 8b,
10a, 10b, 21a and 21b, as shown in FIG. 5, are comprised of rail rods 44, 44' which vertically and rollably sandwich the small diameter portion 36' of the stepped wheel 36.

Therefore, when the movable bleachers are in the contracted state, most of the chain rail 22 is stored in the spiral guide path formed in the frame 1, and the tip end is stored in the drive mechanism 7. position, engage claw 3
0 and the engagement hole 37 provided in the chain link 38 are placed in an engaged state, and a movable audience seat is attached to the tip thereof.

When extending the movable bleachers from this state to temporarily install them, the drive motor 32 is driven to rotate the gear 34 clockwise in FIG. 3.

Then, through the engagement between the engagement claw 30 and the engagement hole 37, the chain link 38 is sequentially extended forward, the chain rail 22 moves straight, and the movable audience seats are extended.

Further, from this state, when the drive motor 32 is driven counterclockwise in FIG. 3, the chain link 38 is
are pulled in sequentially, and the chain rail 22 is moved to the guide rails 8, 17c, 21b, 16b, 10b, 17.
b, 21a, 16a, 10a and 17a.

In addition, although the above-mentioned example showed the case where linear guide rails 16a, 16b, 17a, 17b, and 17c were arranged in middle frame member 1b, the total length of chain rail 22 is short, and the height of middle frame member 1b is If the dimensions can be made relatively short, the straight guide rails can be omitted.

Effects of the Invention Since the present application is constructed as described above, it is possible to make the chain rail go straight straight, and unnecessary effects are eliminated.Furthermore, according to the present application, only the middle frame members having different height dimensions By replacing the chain rails, it is possible to easily accommodate cases where the overall length of the chain rail is different, that is, the movement stroke of the movable seats is different, and has the advantage that it is extremely convenient to use.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is an overall side view with some parts omitted, FIG. 2 is a front view of the drive mechanism, FIG. 3 is a side view of the same, and FIGS. 4 and 5 are views of the wheels. It is a partial sectional view showing the relationship with a guide rail. In the figure, 1 is a frame, 1a is a lower frame member, 1b is a middle frame member, 1c is an upper frame member, 3, 13, 19 are columns,
6, 12, 15, 18 are flanges, 7 is a drive mechanism, 8, 10a, 10b, 16a, 16b, 17
a, 17b, 17c, 21a, 21b are guide rails, 22 is a chain rail, 25 is a machine body, 26 is a driving shaft, 27 is a driven shaft, 28, 29 are chain wheels, 30 is an engaging claw, 31 is a chain belt, 32 3 is a drive motor, 36 is a stepped wheel, 37 is an engaging pawl, 3
8 is a chain link, and 39 is a hinge.

Claims (1)

[Scope of Claims] 1. A three-dimensional frame body that extends in the vertical direction and has a spiral guideway formed therein by guide rails, and a movable audience seat is attached to the tip of the guideway. A chain rail that moves forward and backward in the movable spectator seats is stored, and a drive mechanism that engages with the chain rail and drives it to extend and retract is provided at a lower front position of the frame, and the drive mechanism and the guide path are connected to each other. A drive device for movable bleachers, characterized in that guide rails for guiding chain rails that are extended and retracted by the drive mechanism are respectively disposed between the drive mechanisms. 2. The driving device for movable spectator seats according to claim 1, wherein the guide path is formed by disposing guide rails curved downward and upward at least in the upper and lower parts. 3. A patent claim in which the chain rail is provided with wheels in contact with the floor on the left and right sides of a channel member in the shape of a downward U-shape, and in which a number of chain links with engagement holes provided in the upper surface are rotatably connected by a hinge. A driving device for a movable bleacher seat according to item 1 or 2. 4. The drive mechanism includes a main drive shaft and a driven shaft that are parallel in the front and back and are each provided with a chain wheel, a chain belt that is stretched over the chain wheel and has an engaging pawl on its outer periphery, and the main drive shaft. 4. A drive device for a movable bleacher seat according to claim 3, comprising a motor that can be rotated in forward and reverse directions. 5. A three-dimensional frame that extends in the vertical direction, has a spiral guide path formed inside by a guide rail, and is separable into an upper frame member, a middle frame member, and a lower frame member. A chain rail with a movable bleacher seat attached to its tip and which moves the movable bleacher seat forward and backward is stored in the guide path, and is engaged with the chain rail at a lower front position of the frame body to extend and retract it. Driving a movable spectator seat characterized in that a drive mechanism for driving the seat is provided, and a guide rail for guiding a chain rail that is extended and retracted by the drive mechanism is provided between the drive mechanism and the guide path. Device. 6. A drive device for a movable spectator seat according to claim 5, wherein each frame member is connected by a flange connection. 7 Attach the guide rail that curves downward to the upper frame member,
7. A driving device for a movable spectator seat according to claim 5 or 6, wherein the lower frame member is provided with a guide rail portion that curves upward. 8 Attach a downwardly curved guide rail to the upper frame member,
7. A drive device for movable spectator seats according to claim 5 or 6, wherein the lower frame member is provided with an upwardly curved guide rail, and the middle frame member is provided with a vertical guide rail. 9. A patent claim in which the chain rail is provided with wheels in contact with the floor on the left and right sides of a downward U-shaped channel member, and in which a number of chain links each having an engagement hole provided in the upper surface are rotatably connected by a hinge. A driving device for a movable bleacher seat according to item 5, 6, 7, or 8. 10 The drive mechanism includes a main drive shaft and a driven shaft that are parallel in the front and back and are each provided with a chain wheel, a chain belt that is stretched over the chain wheel and has an engaging pawl on its outer periphery, and the main drive shaft. 10. The drive device for movable spectator seats according to claim 9, comprising a motor that can be rotated in forward and reverse directions.