JP3779143B2 - Mobile bleachers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a moving bleacher seat that is suitably used in a multipurpose hall or the like.
[0002]
[Prior art]
For example, if the clearance between the moving seat and the wall of the hall is small in the hall where the moving seat is installed, it is essential to take measures to avoid contact with the wall due to meandering during storage and storage. It is.
[0003]
As countermeasures such as this, a guide rail such as L-shaped steel is currently provided on the wall surface of the hall, a guide roller and a meandering detection limit switch are installed on the moving seat body side, and if there is some meandering, the guide rail is guided to the guide rail. A method is being studied in which correction is performed by moving the roller along, and when meandering is extremely advanced (when the roller is damaged), an emergency stop is performed by detecting the situation with a limit switch.
[0004]
[Problems to be solved by the invention]
However, this method requires sufficient strength to support the load resistance of the roller on the guide rail side, and there is a problem that the limit of the wall interior becomes large, and there is a load (damage) applied to the roller during meandering. There are problems such as inefficiency.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention takes the following measures.
[0006]
In other words, the mobile auditorium of the present invention includes a drive mechanism that drives the main body of the auditorium to move forward and backward along the vertical surface, and the vertical surface is closer to the side edge of the main body of the auditorium by a predetermined distance or more. A non-contact type sensor for detecting is provided, and based on detection of the vertical surface by the sensor , the drive mechanism performs meandering correction control of the drive mechanism in a direction away from the vertical surface . The sensors are provided in pairs in the direction perpendicular to the advancing / retreating direction, and the sensors are provided on the left and right side edges of the main body of the bleacher seat, and when one sensor detects that the vertical surface has approached more than a predetermined distance. Further, meandering correction control is performed in which the output of the drive mechanism on the same side as the sensor on the side where the approach of the elevation is detected is increased and the output of the other drive mechanism is decreased .
[0007]
In such a configuration, when the advancing and retreating, the main body of the bleacher seat is biased in the left and right forward speed due to the unevenness of the floor, and as a result, when the clearance with the vertical surface becomes small, the vertical surface approaches the predetermined distance or more. On the other hand, the sensor detects meandering, and meandering correction control is performed on the drive mechanism in a direction in which the sensor is away from the vertical surface. For this reason, it is possible to effectively avoid the collision seat body from colliding with the elevation. In addition, the present invention performs non-contact meandering detection based on the elevation, and correction is performed by controlling the driving force of the driving mechanism, so that a large load is not applied to the meandering detection portion, such as a hole. It is also possible to eliminate the need for extra building on the building side.
[0008]
Further, the drive mechanism is provided in pairs in a direction orthogonal to the advancing / retreating direction of the viewing seat body, and the sensors are provided at the left and right side end portions of the viewing seat body, and the elevation surface approaches a predetermined distance or more. When one of the sensors detects this, meandering correction control is performed to increase the output of the drive mechanism on the same side as the sensor that detected the approach of the elevation, and to decrease the output of the other drive mechanism. Therefore, the meandering correction can be effectively performed even when the moving seat is meandering left or right.
[0009]
As a countermeasure when meandering correction control is not effective for some reason, a limit switch that operates when the vertical surface comes in contact is provided at the side edge of the main seat, and the drive is based on the operation of this limit switch. It is desirable to stop the driving of the mechanism.
[0010]
Further, the drive mechanism is provided in pairs in a direction orthogonal to the advancing and retreating direction of the bleacher seat body, and a pair of sensors having different detection distances are provided at either the left or right side end of the bleacher seat body, Based on the detection status of both sensors, if the drive mechanism is controlled to meander both directions in the direction in which the sensor moves away from the vertical surface or the direction in which the sensor approaches the vertical surface , the moving bleacher seat is either left or right Even in the case of meandering, the meandering correction can be performed more effectively.
[0011]
In these cases, in association with each sensor, a limit switch that operates when the vertical surface comes into contact is provided at the left and right side edges of the main seat body, and both drive mechanisms are operated based on the operation of the limit switch. In order to stop driving, or in association with each sensor, a pair of limit switches that operate when the vertical surface comes into contact with the left or right side edge of the main body of the seating area are provided with a pair of limit positions, The driving of both drive mechanisms may be stopped based on the operating conditions of these limit switches.
[0012]
In order to effectively prevent the meandering from occurring again immediately after the meandering correction control, even if the sensor completes the detection when the elevation is more than the predetermined distance, the timer is started after the detection is completed and a certain time is measured It is effective to continue the meandering correction control while the timer is activated.
[0013]
When the main body of the bleacher is made up of multiple steps that are deployed in a tiered shape when in use and stacked vertically when stored, a configuration in which the sensor is installed on the foremost step or a limit switch A configuration provided on the foremost stage floor in proximity to the rear of the sensor is effective.
[0014]
A preferable application object of the present invention is one in which the elevation is the wall surface of a building structure.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 to FIG. 5 are schematic plan views showing an outline of a moving seat according to the present embodiment along with the operation progress. This mobile seat is composed of six steps of floors 2 (2a, 2b, 2c, 2d, 2e, 2f) having different heights, and is closely connected between the left and right wall surfaces W constituting the hall. By being moved forward and backward along the wall surface W, it is developed in a tiered shape so as to rise stepwise from the foremost step floor 2a to the last step floor 2f during use, The upper stage floor 2 can be superposed in the vertical direction so as to be buried under the rear stage floor 2 during storage.
[0017]
In order to drive the main body 1, a pair of drive mechanisms 3 and 3 are arranged behind the hall so as to be separated in a direction perpendicular to the advancing and retreating direction of the main body 1. Each drive mechanism 3 includes a drive motor 31 and a ladder chain 32 that is fed out or wound by the drive motor 31, and the drive end of each ladder chain 32 is connected to the foremost stage floor 2a, The other step floors 2b to 2f are linked to the foremost step floor 2a. These drive motors 31 are connected to a control panel 4 comprising a programmable controller 4a and an inverter 4b, and the drive power is adjusted by frequency modulation of the inverter 4b corresponding to each drive motor 31 from the control panel 4. ing.
[0018]
In such a configuration, in the present embodiment, the left and right wall surfaces W are elevations, and the wall surfaces W are predetermined at the left and right side end portions of the foremost step floor 2a among the step floors 2 constituting the bleacher seat body 1. A non-contact type sensor 5 for detecting that the distance has been approached by a distance or more is provided, and a limit switch 6 that is activated when the wall surface W comes into contact with the step floor 2a is provided adjacent to the rear of the sensor 5. Based on the detection of the approach of the wall surface W by the sensor 5, it is assumed that the sensor 5 performs meandering correction control on the drive mechanism 3 in the direction away from the wall surface W, and that the sensor 5 first detects the approach of the wall surface W. As described above, when the wall surface W comes into contact, the limit switch 6 is operated to stop the drive of both the drive mechanisms 3.
[0019]
FIG. 6 is a block diagram of a control device configured to realize such control, and FIG. 7 is a flowchart showing an outline of a control program stored in the programmable controller. Hereinafter, the operation of the moving seat will be described with reference to this flowchart. Note that this flowchart is merely an example.
[0020]
First, when the program starts, it is determined whether or not the flag C is 1 in step S1. If YES, the program is immediately terminated. This indicates a state in which the limit switch 6 is operated and emergency stop is performed as shown in FIG. 5, and the traveling bleachers cannot be re-driven unless the flag C is reset.
[0021]
If step S1 is NO, the process proceeds to step S2 to determine whether or not the limit switch 6 is ON. If the drive has started properly, NO is initially determined, so the process proceeds to step S3 to determine whether the sensor 5 is ON. If no meandering has occurred at the beginning of the start, it is determined as NO, so the process proceeds to step S4 to determine whether or not the flag A is 1. This flag A is set when the meander control is started. Since NO is initially set, the process returns to step 2. That is, in steps S2, S3, and S4, whether or not meandering is constantly monitored from the state of the limit switch 6 and the state of the sensor 5.
[0022]
Now, for example, the bleacher seat body 1 starts meandering to the right side in the traveling direction, and when the wall surface W approaches the sensor 5 by a predetermined distance or more as shown in FIG. 1, the sensor 5 is turned on. Therefore, YES is determined in step S3, and the process proceeds to step S5. In step S5, it is determined whether or not the meandering control is ON. Since NO is initially determined, the process proceeds to step S6, the meander control is turned ON, the flag A is set to 1 in step S7, and the process returns to step S2. Since it becomes YES when passing through step S5 after the 2nd time, it returns to step S2 as it is. The meandering control is performed as follows. When the right sensor is turned on in the traveling direction, the driving force of the right drive motor 31 needs to be larger than that of the left drive motor 31. Therefore, for example, if the inverter 4b for energizing both drive motors 31 in normal control is set to 60 Hz, the inverter 4b of the right drive motor 31 is set to 70 Hz and the drive motor 31 of the left drive motor 31 is turned on as shown in FIG. The inverter 4b is switched to 50 Hz. As a result, the driving force of the right driving motor 31 is superior to the driving force of the left driving motor 31, and the bleacher seat body 1 gradually begins to correct the trajectory to the left. The frequency modulation relationship of the inverter 4b is reversed for meandering in the reverse direction.
[0023]
If the meandering is eliminated to some extent and the sensor 5 is turned off by a predetermined distance or more from the wall surface W as shown in FIG. 3, NO is determined in step S3, and the process proceeds to step S4. At this time, since the flag A is set to 1, the process proceeds to step S8. Then, it is determined whether or not the timer is ON. In the case of YES, the process returns to step S2, but since it is initially NO, the process proceeds to step S9. In this step S9, it is determined whether or not the flag B is 1. This flag B is set when the timer is operated, and is initially NO. Therefore, the process proceeds to step S10, the timer is turned on, the flag B is set to 1 in step S11, and the process returns to step S2. The set time of the timer is an estimated time from when the sensor 5 no longer detects meandering until the meandering is eliminated. Since it is determined as YES when passing through step S8 after the second time and during the timer operation, the process directly returns to step S2. When the timer is turned off as shown in FIG. 4, NO is determined again in step S8, and the process proceeds to step S9. At this time, since the flag B is 1, the process proceeds to step S12, the meander control is turned off, the flags A and B are set to 0 in step S13, the process returns to step S2, and the meander monitoring system is established again.
[0024]
In addition, the output change width of a drive motor, the setting of a timer, etc. are adjusted according to the condition of each property.
[0025]
As described above, the moving bleacher of the present embodiment is configured such that the bleacher main body 1 is driven forward and backward by the drive mechanism 3 along the wall surface W. In addition, a non-contact type sensor 5 for detecting that the wall surface W has approached more than a predetermined distance is provided, and the drive mechanism 3 is meandered in the direction in which the sensor 5 moves away from the wall surface W based on the detection of the wall surface W by the sensor 5. It is intended to be controlled.
[0026]
And based on such a configuration, when the advancing and retreating, the bleaching seat body 1 is biased in the left and right forward speed due to the unevenness of the floor, and as a result, the clearance with the wall surface W becomes small. The sensor 5 detects meandering when the wall surface W approaches a predetermined distance or more, and the drive mechanism 3 can be subjected to meandering correction control in a direction in which the sensor 5 moves away from the wall surface W.
[0027]
For this reason, it is possible to effectively avoid the collision seat body 1 from colliding with the wall surface W. In addition, the present embodiment performs non-contact meandering detection based on the wall surface W, and correction is performed by controlling the driving force with respect to the driving mechanism 3, so that a large load is not applied to the meandering detection portion. It is also possible to eliminate the need to make a separate step on the wall surface W of the hall.
[0028]
In addition, a limit switch 6 that operates when the wall surface W comes into contact with the side end portion of the auditorium main body 1 is provided, and the drive of the drive mechanism 3 is urgently stopped based on the operation of the limit switch 6. Therefore, safety and reliability can be ensured by avoiding the occurrence of an accident and the breakage of the moving seat when the meandering correction control is not effective for some reason.
[0029]
In particular, in this embodiment, the drive mechanism 3 is provided as a pair in a direction orthogonal to the advancing / retreating direction of the bleacher seat main body 1, the sensor 5 is provided at the left and right side ends of the bleacher seat main body 1, Since the sensor 5 on the side detecting the approach of W modulates the frequency of both drive mechanisms 3 in the direction away from the wall surface W, the meander correction can be effectively performed. .
[0030]
In this case, in association with each sensor 5, a limit switch 6 that operates when the wall surface W comes into contact is provided at the left and right side ends of the bleacher seat body 1, and both driving based on the operation of the limit switch 6 is provided. Since the drive of the mechanism 3 is stopped, the emergency stop can be effectively performed.
[0031]
Furthermore, the sensor 5 of this embodiment completes the detection when the wall surface W is separated by a predetermined distance or more, and is provided with a timer that starts after the detection is completed and measures a certain time. Since the meandering correction control is continued, it is possible to effectively prevent the occurrence of meandering again after the meandering correction control by sufficiently reestablishing the structure of the auditorium main body 1.
[0032]
In particular, the bleacher seat body 1 of this embodiment is composed of a plurality of step floors 2a to 2f that are unfolded in the shape of a tier when used and superposed in the vertical direction when stored. Since it is provided on the step floor 2a and the limit switch 6 is provided on the foremost step floor 2a close to the rear of the sensor 5, the meandering is reliably detected by detecting the meandering at the position where it is most likely to swing left and right. It is possible to increase the accuracy of the.
[0033]
The specific configuration of each part is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, the vertical surface is a wall surface, but it is also possible to use a vertical surface other than the wall surface, such as a guide panel or a handrail.
[0034]
The drive mechanism may be a caterpillar type other than the ladder chain.
[0035]
Furthermore, in the above-described embodiment, one sensor is provided at each of the left and right side end portions of the bleacher seat body so as to detect the wall surface, but sensors with different detection distances are arranged on either the left or right side of the bleacher seat body. A pair of ends may be provided, and either or both of the drive mechanisms may be subjected to meandering correction control in a direction in which the sensor is separated from the vertical surface or a direction in which the sensor approaches the vertical surface based on the detection status of both sensors. For example, when the detection distance is different and both sensors work together, the wall approaches abnormally (ie, meanders to the wall), when only one sensor works, the proper range, when both sensors are not working together In addition, since abnormal separation from the wall surface (that is, meandering to the opposite side) can be detected, meandering control similar to the case where one sensor is provided at each of the left and right side ends is possible. Similarly, the limit switches are associated with each sensor, and a pair of limit switches that are activated when the vertical surface comes into contact with the right or left side end of the main body of the seating area are provided with a pair of limit positions. The drive of both drive mechanisms may be stopped based on the operating state of the limit switch.
[0036]
Furthermore, in the embodiment described above, meandering detection is performed at the left and right side ends of the main seat body. However, if only one side is required, it is sufficient to provide one sensor and one limit switch.
[0037]
【The invention's effect】
The present invention is implemented in the form as described above, and has the effects described below.
[0038]
In other words, the mobile bleacher of the present invention is a non-contact type that detects that the standing surface has approached the side edge of the viewing seat body more than a predetermined distance when the traveling seat body is driven forward and backward by the drive mechanism along the standing surface. the type of sensor is provided, together with the sensor is to be meandering correction controlling the drive mechanism in a direction away from the elevation based on the detection of elevation due to the sensor, the drive mechanism, the moving direction of the bleachers body The sensors are provided in pairs in the orthogonal direction, and sensors are provided on the left and right side ends of the main body of the bleacher seat, and when one sensor detects that the vertical surface has approached more than a predetermined distance, the vertical surface The meandering correction control is performed to increase the output of the drive mechanism on the same side as the sensor on the side where the approach is detected and decrease the output of the other drive mechanism .
[0039]
For this reason, when the clearance between the viewing area main body and the standing surface becomes small, the fact is detected by the sensor, and accurate meandering correction control can be performed through the driving mechanism, and the viewing seat body collides with the elevation surface. This can be effectively avoided.
[0040]
In addition, since the meandering detection is performed in a non-contact manner with respect to the elevation surface, the correction is performed by controlling the driving force with respect to the driving mechanism, so that a large load is not applied to the meandering detection portion, the elevation of the hole, etc. In addition, it is possible to simplify the installation work and maintenance, and improve the degree of opening of the hall when the moving seat is not used. In addition, the drive mechanism is provided in pairs in the direction perpendicular to the advancing / retreating direction of the main body of the bleacher seat, and the sensors are provided at the left and right side end portions of the main body of the passenger seat, and the elevation surface approaches a predetermined distance or more. When one sensor detects this, meandering correction control is performed to increase the output of the drive mechanism on the same side as the sensor that detected the approach of the elevation, and to decrease the output of the other drive mechanism. Therefore, the meandering correction can be effectively performed even when the moving seat is meandering left or right.
[0041]
If a limit switch that operates when the elevation comes in contact with the side edge of the main seat is installed and the drive mechanism is stopped urgently based on the operation of this limit switch, it will meander for some reason It is possible to effectively improve the safety and reliability of the moving seat by avoiding the occurrence of an accident and the damage of the moving seat when the correction control is not effective.
[0042]
A pair of drive mechanisms are provided in a direction perpendicular to the advancing and retreating direction of the viewing seat body, and a pair of sensors with different detection distances are provided on either side of the left or right side of the viewing seat body, so that the detection status of both sensors Based on the meandering correction control of either or both of the drive mechanisms in the direction in which the sensor moves away from the vertical surface or the direction in which the sensor approaches the vertical surface, the meandering correction is performed even if the moving seat is meandering to the left or right Can be performed more effectively.
[0043]
In these cases, a limit switch that is activated when the vertical surface comes into contact is provided at each of the left and right side edges of the main seat body in association with each sensor, and both drive mechanisms are driven based on the operation of this limit switch. Limit switches that are activated when the vertical surface comes into contact with the sensors on the left or right side of the auditorium seat body, with different limit positions. If the drive of both the drive mechanisms is stopped based on the operating state of the limit switch, an emergency stop can be effected for both the left and right meanders.
[0044]
When the sensor is a simple type that detects only when the elevation is within a predetermined distance, a timer that starts after the detection is completed and measures a certain time is provided. If it continues, it will become possible to effectively avoid the situation of meandering again by conducting meandering correction control until the main body of the auditorium sufficiently reestablishes the system.
[0045]
When the main body of the auditorium consists of a multi-stage floor that is deployed in tiers when used and stacked vertically when stored, a sensor is provided on the front floor and the limit switch is located behind the sensor. If they are provided close to each other at the foremost stage floor, it is possible to reliably detect meandering at the place where the displacement is the largest and to increase the accuracy of meandering correction control.
[0046]
Since it is the above structures, this invention can become very useful when applied to the place where an upright surface is wall surfaces, such as a hall | hole.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing an embodiment of the present invention in a certain operating state.
FIG. 2 is a schematic plan view showing the embodiment in another operating state.
FIG. 3 is a schematic plan view showing the embodiment in an operating state other than the above.
FIG. 4 is a schematic plan view showing the embodiment in an operating state other than the above.
FIG. 5 is a schematic plan view showing the embodiment in an operating state other than the above.
FIG. 6 is an exemplary block diagram showing a control apparatus according to the embodiment;
FIG. 7 is a flowchart showing an outline of control in the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Grandstand seat body 2 (2a, 2b, 2c, 2d, 2e, 2f) ... Step floor 2a ... Frontmost step floor 3 ... Drive mechanism 5 ... Sensor 6 ... Limit switch W ... Elevation surface (wall surface)

Claims (9)

In what comprises a drive mechanism that drives the main body of the bleacher forward and backward along the elevation,
A non-contact type sensor that detects that the vertical surface has approached a predetermined distance or more is provided at the side end of the main body of the bleacher seat, and the drive mechanism moves the sensor away from the vertical surface based on the detection of the vertical surface by the sensor. And meandering correction control ,
The drive mechanism is provided as a pair in a direction orthogonal to the advancing / retreating direction of the viewing seat body, and sensors are provided at the left and right side end portions of the viewing seat body, and the vertical surface is closer than a predetermined distance. When one sensor detects, meandering correction control is performed to increase the output of the drive mechanism on the same side as the sensor that detected the approach of the elevation and to decrease the output of the other drive mechanism. A moving bleacher that is characterized by a moving bleacher. 2. A limit switch that operates when a vertical surface comes into contact with a side end of the bleacher seat body is provided, and driving of the drive mechanism is stopped based on the operation of the limit switch. The listed moving bleachers. The drive mechanism is provided in pairs in a direction perpendicular to the advancing / retreating direction of the main body of the bleacher seat, and a pair of sensors having different detection distances are provided on either side of the left or right side of the main body of the passenger seat. 2. The mobile seat according to claim 1, wherein both drive mechanisms are subjected to meandering correction control in a direction in which the sensor moves away from the vertical surface or in a direction in which the sensor approaches the vertical surface based on the detection state of the above. In association with each sensor, a limit switch that operates when the vertical surface comes into contact is provided at the left and right side edges of the main seat body, and the drive of both drive mechanisms is stopped based on the operation of this limit switch. The mobile bleachers according to claim 1, 2, or 3 . In association with each sensor, a pair of limit switches that operate when the elevation comes into contact with either side of the right or left side of the seating area are provided with a different limit position. 4. The traveling bleacher according to claim 1, wherein driving of both driving mechanisms is stopped based on the driving seat. The sensor completes the detection when the elevation surface is separated by a predetermined distance or more, and is provided with a timer that starts after the detection is completed and measures a certain time, and continues the meandering correction control while the timer is started. The mobile bleachers according to claim 1, 2, 3, 4 or 5 . The spectator seat body is composed of a plurality of stepped floors that are deployed in a tiered shape when in use and stacked vertically when stored, and a sensor is provided on the foremost stepped floor. Item 1 or 3 mobile bleachers. The main body of the auditorium consists of a multi-tiered floor that is deployed in tiers when in use and stacked vertically when housed, and a sensor is provided on the foremost floor, and a limit switch is located behind the sensor. The moving bleachers according to claim 2, 4 or 5 , characterized in that the moving bleachers are provided in the foremost stage floor in the vicinity. The mobile seat according to claim 1, 2, 3, 4, 5, 6, 7 or 8 , wherein the elevation is a wall surface of a building structure.

Images