JPH0126842Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a main body drive regulating device for a retractable staircase-like audience seat.

In recent years, in order to use the interior of gymnasiums for multiple purposes, it has become common for gymnasiums to install retractable and movable tiered seats on a portion of the floor near the wall. This viewing seat is formed by interconnecting a plurality of movable platforms with viewing chairs of increasing height so that it can be moved by expansion and contraction in the front and back direction.
When the spectator seats are used, they are pulled out one after another starting with the lowest movable platform at the front, and the entire structure is extended into a dais-like structure, so that a large number of spectators can sit on the chairs on each movable platform. Also, when not in use,
Contrary to the above, by moving backwards from the frontmost movable bed in order to return it to the rear movable bed, the entire structure is reduced to a vertical shelf under the topmost movable bed. Therefore, it is configured so that it can be stored in a storage recess provided on the wall side of a building.

However, with conventional bleachers of this type, when moving the movable platform of part or all of the bleachers forward and backward,
When the rollers placed on the bases on both sides at the lower end of each movable bed slide in sliding contact with the floor surface on each side and roll, both sides may Even if the amount of movement of the main body differs, there is no means for regulating the deflection of movement of the main body caused by the above. Therefore, when the seats are moved, there is a problem in that the movable platform, which is the initiator of the movement, is subject to serious damage due to the collision accident with the side wall surface during deflection of the movement due to the above-mentioned reason.

This invention was devised to solve the above problems, and its purpose was to attach brackets to both sides of the front end of the movable platform, which is the starting body of movement, and to attach brackets to the front of each bracket. The position is for regulation that temporarily stops the main body drive motor on the opposite side when it comes into contact with the side wall surface of each side, and forcibly stops the motors on both sides when the number of times this occurs exceeds a specified limit. A limit switch is provided in a protruding manner, and an emergency stop limit switch is also provided at the rear of each of the above brackets in a deeper protruding form somewhat inward of the above limit switch, and on each side, the same as the above limit switch. By making it possible to operate the rollers placed on both bases at the bottom of each moving platform,
When sliding and rolling on the floor surface on each side, the movement of the main body on both sides is corrected and deflected due to the difference in the amount of movement on both sides due to changes in the unevenness depending on the left and right sides. A main body drive regulating device for a telescoping staircase-shaped bleachers, which drives a motor in an appropriate manner, thereby smoothly and easily moving forward and backward while avoiding collision accidents with a movable platform. Our goal is to provide the following.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

First, to explain the configuration, as partially shown in Figure 1, when in use, the entire bleacher seat A is moved from a storage recess (not shown) on the rear wall side to a floor surface C in front of it, and the bleacher seat The entire structure is achieved by sequentially pulling out the movable platform 2 with multiple stages of B, together with the base 1 with the support 4 of each stage by the rolling of the roller 3, from the frontmost stage side under the mutually connected state. It extends like a pedestal, and when needed, it is moved back to the bottom of the top step in reverse order from the top step to the bottom of the top step.
The above-mentioned viewing platform is installed in a retractable staircase-like seating area that is assembled into a single unit under a vertical shelf-like reduction body, and the movable platform 2 in this state can be stored in a recess (not shown) in its original state behind it. When moving part or all of the movable floor base 2 of seat A forward or backward, the following limit switch mounting brackets are installed on both sides of the bottom surface of the front end of the first stage movable floor base 2, which always starts the movement. 5 is installed.

As shown in FIGS. 2 and 3, the limit switch mounting bracket 5 is made by bending a metal plate into an approximately inverted T-shape, and attaching the upper end of the metal plate to both sides of the bottom surface of the front end side of the movable floor table 2. By abutting the clamp plate 6 against the upper side of the bottom surface at each position and tightening the bolts 9 inserted from the bracket 5 into the screw holes of the clamp plate 6, the horizontal surface of the lower part is turned to the side, so that the clamp plate is integrally suspended. It's lowered. At the front position of the lower horizontal surface of each bracket 5, regulating limit switches 7A and 7B of a type that are activated by contact with a rod-shaped contact portion are provided, with the rod-shaped contact portion protruding horizontally to the side at each position. It is installed by

Further, at the rear position of the lower horizontal surface of the bracket 5, the above-described limit switches 7A and 7B are installed.
The emergency stop limit switches 8A and 8B, which are similar to the type described above and are actuated by contact with the rod-shaped contact portion, have a rod-shaped contact portion that is somewhat shorter than the rod-shaped contact portion of the above-described rod-shaped contact portion. It is attached so that it protrudes towards the direction. The emergency stop limit switches 8A, 8B are arranged in such a manner that their rod-shaped contact portions are both slightly inwardly protruding from the regulating limit switches 7A, 7B at each position.

Limit switches 7A and 7B for regulation according to the above
and emergency stop limit switches 8A and 8B,
1 group of bases, which are interconnected with the rollers 3 and pillars 4 of each stage on that side, are driven segmentally on each side. They are connected to the main body drive motors 11 and 12 shown in FIG. 5, which are installed at the bottom of the left and right sides, respectively, according to the following setting conditions.

The above motors 11, 12 and each limit switch 7A, 7B, 8A, 8B are connected by a wiring circuit shown in Fig. 6, and are set to enable the following control operations through the intervention of each timer. There is. In other words, when the spectator seat A is moved, if one of the regulating limit switches 7A and 7B comes into contact (ON) with the side wall surface D on that side due to movement deflection of the main body, the limit switch 7A that came into contact with the main body will be turned on. Or motor 1 on the opposite side of 7B
1 or 12 is set to stop its drive for 0.7 seconds. In addition, if the above contact state continues even after 0.8 seconds have elapsed,
The motor 11 or 12 on the opposite side described above is set to continue stopping its drive for 0.7 seconds again. The motors 11 and 12, which have been stopped for 0.7 seconds as described above, are set to forcibly interrupt the movement of the main body, regardless of which side, when the motors 11 and 12 have been stopped 6 times. ing. Note that when the control of this movement is interrupted less than 6 times but up to 5 times, the limit switches 7A and 7B are
When the motor 11 is in a state of non-contact (OFF), in order to make the previous number of times (up to six times) zero, the motor 11 on the opposite side stops driving at a rate of once every 0.9 seconds for that number of times. or 12. Furthermore, the emergency stop limit switches 8A and 8B are located slightly further back and deeper than the limit switches 7A and 7B described above, so if they are faced with a contact situation similar to the above, their positions will shift. The setting is such that the same operation is performed with a delay corresponding to the depth.

Next, the effect will be explained.

With the above configuration, for example, the right motor 11 and the left motor for driving the main body can be moved from a state in which the spectator seat A is reduced to a vertical shelf shape under the top movable platform 2 in a storage recess (not shown). When the movable platform 2 at the frontmost stage is moved forward to its forward position by the driving force generated by the roller 12, the roller 3 comes into sliding contact with the floor surface C on each side and rolls. When moving, if the amount of movement on both sides differs due to changes in the unevenness of the floor surface C depending on the left and right sides, the movement of the main body will be biased toward the side with the smaller amount of rotation. For example, when the deflection occurs to the left as shown in FIG. Since the limit switch 7A is turned on when it comes into contact with the wall D, the right motor 11 on the opposite side stops driving for 0.7 seconds according to the setting conditions described above. When this drive is stopped, the left motor 12
Since it is continuously driven, it is possible to reliably correct the leftward movement deflection of the main body due to the above and shift to a normal forward movement mode.

Furthermore, if the above-mentioned leftward deflection causes the limit switch 7B on this side to remain in contact even after 0.8 seconds, the right motor 11
will stop again for 0.7 seconds. Therefore, by continuing this operation, it is possible to easily and reliably correct the seating A to its normal movement course without requiring any human power.

Furthermore, if the above-mentioned forced stop operation of the main body is performed six times, both motors 11 and 12 will stop simultaneously at the sixth stop operation, so the above-mentioned stop will continue in this biased state. It turns out. However, as mentioned above, if the above forced stop operation does not reach 6 times, the motor 11 or 12 on the opposite side is 0.9
Since the drive is stopped at a rate of once per second,
Through this correction operation, even if the main body is deflected several degrees, it can be easily and accurately corrected automatically to a normal movement course.

When the regulation limit switches 7A, 7B contact each other, if the degree of contact is large enough to affect the emergency stop limit switches 8A, 8B located adjacent to them due to the degree of deflection, Since the side limit switch 8A or 8B comes into contact with the side wall surface D at this position, each of the above-mentioned dividing operations is easily and quickly repeated, thereby making it possible to escape from the worst situation.

The cumulative number of times due to the deflection movement trouble mentioned above can be calculated because the "addition/subtraction counter" is configured by a program in the official circuit diagram (not shown).
The above-mentioned cumulative number of times is counted with high precision, thereby making it possible to regulate the drive of the main body with high precision. Note that the set values of the timer and addition/subtraction counter in the above description of the operation can be changed arbitrarily. According to the above, it is possible to compose an optimal regulating device according to various site conditions.

As explained above, this device is equipped with brackets on both sides of the front end of the movable platform that serves as the starting body of movement, and the front position of each bracket is opposite when it comes into contact with the side wall surface of each side. A regulating limit switch is provided in a protruding manner to temporarily stop the main body drive motor on the side, and forcibly stop the motors on both sides when the number of times exceeds a specified limit. An emergency stop limit switch is installed with a deeper protrusion slightly inside the limit switch,
By enabling the same operation as the limit switch above for each side, the rollers placed on both bases at the bottom of each movable platform slide and roll on the floor surface of each side. In this case, when the movement of the main body is deflected due to differences in the amount of movement on both sides due to changes in the unevenness depending on the left and right sides, this can be corrected and the main body drive motors on both sides can be driven appropriately. This allows the movable platform to automatically move forward and backward smoothly, easily, and accurately while avoiding collision accidents, greatly improving the accuracy and quality of the retractable stepped bleachers. There is an effect.

[Brief explanation of drawings]

Fig. 1 is a partial side view of the bleachers equipped with the main body drive regulating device according to this invention, Fig. 2 is a detailed side view of section E in Fig. 1, Fig. 3 is a detailed front view of the same, and Fig. 4 is the same. FIG. 5 is a plan view showing the arrangement of each limit switch in section E, FIG. 5 is a schematic plan view showing the state of movement and deflection that is symmetrical to the drive regulation of the main body, and FIG. 6 is a circuit diagram of the device. 1...Base, 2...Moving floor stand, 3...Roller,
5... Limit switch mounting bracket, 7
A, 7B...Regulation limit switch, 8A, 8
B...Emergency stop limit switch, 11...Right motor, 12...Left motor, A...Grandstand seats,
D...Side wall surface.

Claims (1)

[Scope of utility model registration request] When moving a part or all of the movable platform of the spectator seats forward or backward, limit switch mounting brackets are attached to both sides of the bottom surface of the front end of the movable platform, which is the starting point of movement, and each bracket is At the front position, when each side makes contact with the side wall surface, a temporary stop command is given to the main body drive motor on the opposite side, and when the number of times exceeds a specified limit, a forced stop command is given to the motors on both sides. A regulation limit switch that issues a stop command is provided in a protruding manner, and an emergency stop limit switch is provided at the rear of each bracket in a deep protrusion that is somewhat inside the regulation limit switch. 1. A main body drive regulating device for a retractable stepped spectator seat, characterized in that the device is configured to perform a command operation similar to that of the limit switch in each case.