JPH0431947Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a travel drive device for a movable grandstand that moves a movable grandstand that is made up of a plurality of seats and a support member that supports each seat.

(Prior Art) A conventional travel drive system for movable bleachers will be explained with reference to FIGS. 5 to 8. In FIG. It is composed of a steel structure support member 07 that supports each seat, and a movable spectator seat 01 at the front driving block.
Rear driven block movable spectator seats 015 sequentially from 5a
Running rail 014 on the ground side as shown in b~015g
The support members 07 are mutually connected (not shown) and supported (arranged) so as to be movable back and forth by running wheels 012 of the legs of the support member 07 .

The shafts of running wheels 012 provided on the legs of the support member 07 of the movable seats 015a of the front drive block are connected to the left and right by a transmission shaft 08 as shown in FIGS. 6, 7, and 8. pinion gear 011
and a second stage sprocket 09 are attached, and the sprocket 09 is connected to a first stage sprocket 03 attached to the output shaft 02 of the motor 01 and a chain 01.
It is installed so that power can be transmitted by 3. Further, the pinion gear 011 meshes with a rack gear 010 provided parallel to the inside of a running rail 014 provided on the ground side, and the forward and reverse rotation of the motor 01 causes the running wheels 012 and the running rail 014 to be connected to each other.
Regardless of the frictional force generated between
15b to 015g are towed and moved to the extended (left) and stowed (right) positions as shown on the left and right sides of FIG.

(Problems to be Solved by the Invention) In the conventional travel drive device for movable seats shown in FIGS. It is necessary to provide a pinion gear 011 and a rack gear 010 in consideration of slippage between the pinion gear 011 and the rack gear 010. In addition, in order to ensure the engagement between the pinion 011 and the rack 010 without lifting up,
There was a problem in that it was necessary to increase the weight of the frontmost drive block movable bleachers 015a, and the motor 01 became larger, resulting in higher costs.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems, and is a traveling drive of a movable bleacher seat that moves a movable bleacher seat made up of a plurality of seats and a support member that supports each seat. In the apparatus, a winch is provided in the center of the support member;
A tension adjustment device is installed on both sides of the winch, and the wire rope fixed by the terminal stopper installed on the ground side is wound around the drum of the winch via the tension adjustment device, and the wire rope is connected to the drum. The object of the present invention is to provide an improved traveling drive device for movable bleachers that can reduce manufacturing costs.

(Function) As described above, in the movable bleacher seat running drive device of the present invention, both ends of the wire rope are attached to the fixed member on the ground side, and the middle part of the wire rope is installed on the support member of the movable bleacher seat. It is wound around the drum of the winch via tension adjustment devices installed at the front and rear, and when the drum of the winch is rotated, the movable seats move back and forth. Also, at this time, the wire rope is tensioned by a wire rope tensioning device, so that the movable bleachers can move back and forth without slipping.

(Example) Next, the traveling drive device for the movable bleachers of the present invention was
To explain with an example shown in FIGS. 4 to 4,
1 is a motor, 2 is a winch driven by the motor 1, 8 is a drum of the winch 2, and the motor 1 and the winch 2 are installed on a support member 07 having a steel frame structure. A wire rope 4 is wound around the drum 8 of the winch 2, and both ends of the wire rope 4 are attached to fixing members 5, 5 on the ground side. 3 is a V-shaped lever of the wire rope tension adjustment device; 3c is a shaft that swingably supports the central part of the V-shaped lever 3 on a support member 07;
a is a guide roller rotatably attached to the tip of the winch side of the V-shaped lever 3, 3b is a guide roller rotatably attached to the shaft 3c, 6 is a bracket fixed to the support member 07, and 17 is the same. A rod 1 that swingably penetrates the bracket 6.
7a is the tip of the same rod 17, 16 is the same rod 1
Tension adjustment nut screwed into the threaded part in the middle of 7, 1
Reference numeral 5 denotes a tension spring interposed between the tip of the V-shaped lever 3 on the opposite side of the winch and the tip 17a of the rod 17. The middle part of the wire rope tension adjusting device 4 is wound around the upper side of the guide roller 3a and the lower side of the guide roller 3b of each wire rope tension adjustment device, and the tension spring 15 pulls the tip of the V-shaped lever 3 on the opposite side from the winch in the direction of the bracket 6. Stretch it,
A constant tension is applied to the wire rope 4 between the fixing members 5, 5. Further, by rotating the nut 16 and changing its position, the tension of the wire rope 4 can be adjusted.

Next, the operation of the travel drive device for the movable bleachers shown in FIGS. 1 to 4 will be explained in detail. When the motor 1 is driven, its rotation is transmitted to the winch 2, causing the drum 8 to rotate. This drum 8 has
A wire rope 4 is wound, and both sides of the wire rope 4 are attached to fixed members 5, 5 on the ground side, and one wire rope 4 extending from the drum 8 to one of the fixed members 5 is wound up. , the remaining wire rope 4 on one side extending from the drum 8 to the other fixed member 5 is let out, and the frontmost driving block movable spectator seat (see 015a in FIG. 5) moves forward and backward. At this time, the wire rope 4 is wound on the drum 8 at both ends using the wire rope tension adjusting device {3, 3a,
3b, 3c, 6, 15, 16, 17, 17a, see FIGS. 1, 2, and 4}, the wire rope 4 and the drum 8 are
Due to the frictional force of
15a moves back and forth without slipping.

(Effect of the invention) As described above, in the traveling drive device for the movable bleachers of the present invention, both ends of the wire rope are attached to the fixed member on the ground side, and the middle part of the wire rope is installed on the support member of the movable grandstand. It is wound around the drum of a winch, and when the drum of the winch is rotated, the movable seats move forward and backward. Also, at this time, the wire rope is tensioned by a wire rope tension adjustment device, so that the movable spectator seats can move in the front and rear directions without slipping. Therefore, the pinion and rack required in the conventional travel drive device for movable spectator seats are no longer necessary. Furthermore, the weight of the bleachers is increased to ensure the engagement between the pinion and the rack.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a traveling drive device for movable bleachers as an embodiment of the present invention, Fig. 2 is a plan view of the entire device shown in Fig. 1, and Fig. 3 is a view taken from Fig. 2 - arrow direction. 4 is a longitudinal sectional view taken from the direction of the arrows in FIG. 2, FIG. 5 is a perspective view showing the overall configuration of the movable bleachers, and FIG. 6 is a perspective view showing the traveling drive device of the conventional movable bleachers. 7 is a plan view of the entire apparatus shown in FIG. 6, and FIG. 8 is a cross-sectional view taken along arrows in FIG. 7. Explanation of symbols, 01...Motor, 02...Output shaft, 03...1st stage sprocket, 07...Movable audience seat support member, 08...Transmission shaft, 09...2nd stage
Stage sprocket, 010...Rack gear, 01
1... Pinion gear, 012... Running wheel, 0
13...Chain, 015...Movable bleachers, 01
5a...Front driving block movable bleachers, 015
b~015g...Rear driven block movable bleachers,
1...Motor, 2...Winch, 3...V-shaped lever for tension adjustment device, 3a...Winch side guide roller for tension adjustment device, 3b...Fixed side guide roller for tension adjustment device, 3c...Tension Support shaft for adjustment device, 4... Wire rope for tension adjustment device, 5...
... Wire rope fixing member, 6 ... Bracket for tension adjustment device, 8 ... Drum for winch, 15 ...
Tension spring, 16...Tension adjustment nut, 17...Tension adjustment screw rod, 18...Tension adjustment screw rod tip metal fitting.

Claims (1)

[Scope of utility model registration request] In a travel drive device for a movable bleacher seat that moves a movable bleacher seat made up of a plurality of seats and a support member that supports each seat, a winch is provided in the center of the support member, and a tension adjustment device is provided between the front and rear sides of the winch. A wire rope fixed by a terminal stopper provided on the ground side is wound around the drum of the winch via a tension adjustment device to ensure the frictional force between the drum and the wire rope. A travel drive device for movable bleachers featuring: