JPH07292959A - Moving scaffold - Google Patents

Abstract

PURPOSE:To automatically raise or lower adjacent working scaffolds at synchronous speeds. CONSTITUTION:A plurality of moving scaffolds 10 arranged parallel to one another each have a n upper limit switch 11 and a lower limit switch, both of which are mounted on the ends of their working scaffolds to detect the difference in height between the adjacent working scaffolds 5. Upper and lower limit dogs for operating the upper 11 and lower 13 limit switches are mounted on the ends of the adjacent working scaffolds 5. When the adjacent working scaffolds 5 started to rise or fall are at different heights and the limit switches detect the difference in height, the speeds at which the working scaffolds 5 are raised and lowered are adjusted by a speed controller 15 so that the working scaffolds are raised or lowered while being kept horizontal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable lifting scaffold in which a work scaffold is mounted on a mast which is erected on a movable carriage so as to be lifted and lowered.

[0002]

2. Description of the Related Art A movable lifting scaffold will be described with reference to FIG. 4. In the movable lifting scaffold 1, a mast 4 is erected on a carriage 3 having wheels 2 for traveling, and a working scaffold 5 can be lifted and lowered on the mast 4. The scaffold 5 for work is moved up and down along the mast 4 by the motor 6. The movable lifting scaffolding 1 is disposed on the side of the building during the construction work, and the trolley 3 is moved together with the scaffolding 5 for work according to the location of the construction work. It is used for securing work scaffolds in places, carrying in materials, and raising and lowering workers.

Further, when the work surface is wide or when it is necessary to carry in the material of a long object, a plurality of movable hoisting scaffolds 1 are arranged side by side and used. And when raising and lowering adjacent work scaffolds at the same time while keeping them at the same height, while adjusting the raising and lowering speeds of the work scaffolds while the workers see the raising and lowering speeds of the work scaffolds from each other. I try to go up and down.

[0004]

However, as described above, it is difficult, dangerous, and inefficient for the operator to perform the lifting operation while visually confirming the lifting speed of the work scaffold. is there.

In view of the above points, it is an object of the present invention to provide a movable hoisting scaffold capable of automatically hoisting while synchronizing adjacent work scaffolds when the mobile hoisting scaffolds are arranged in parallel.

[0006]

In order to achieve the above-mentioned object, the present invention is directed to a movable hoisting scaffold in which a mast is erected on a trolley capable of traveling and a work scaffold is attached to the mast so as to be able to move up and down. , Equipped with a scaffold position detection sensor for detecting the height deviation between the work scaffolds of the mobile scaffolds adjacent to the end of the work scaffold of the mobile scaffolds installed side by side A feature of the invention is that the scaffolding position detection sensor is provided with an ascending / descending speed controller that adjusts the ascending / descending speed of the work scaffold when the scaffolding position detection sensor detects a height shift between adjacent work scaffolds.

[0007]

In the movable hoisting scaffold of the present invention, when a plurality of groups are installed in parallel and the working scaffolds are hoisted in synchronization,
First, the adjacent work scaffolds are raised or lowered from the same height. If the work scaffold on one side moves up and down quickly during vertical movement, causing a height shift between adjacent work scaffolds, the scaffolding position detection sensor provided at the end of the work scaffolds Detects height deviation from the scaffold. Based on this height difference, the ascending / descending speed control device adjusts the ascending or descending speed of the work scaffolds on one side to raise or lower the work scaffolds while keeping the heights of the adjacent work scaffolds at the same height.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows two mobile lifting scaffolds 10 of the present invention arranged side by side. The basic structure of the mobile lifting scaffold is almost the same as the known mobile lifting scaffold shown in FIG. Therefore, the same numbers are given to the same components.

In the mobile hoisting scaffolding 10 of the present invention, the mobile hoisting scaffolding 1 is so arranged that one ends of the working scaffolds 5 approach each other.
Two 0s are arranged side by side, and an upper limit switch 11 and a lower limit switch 12 which are scaffolding position detection sensors are attached to one end of the work scaffold 5 as shown in FIG. Further, the limit switches 1 and 12 come into contact with the limit switches 1 and 12 at one end of the adjacent work scaffolds 5.
An upper limit dog 13 and a lower limit dog 14 for outputting signals from 1 and 12 are attached.

Further, the upper limit switch 11, the lower limit switch 12, and the motor 6 are connected to a hoisting speed control device 15 for controlling the hoisting speed of the work scaffold when the work scaffold moves up and down along the mast 4. .

Next, the case where the working scaffolds 5 of the two movable lifting scaffolds 10 are simultaneously moved up and down will be described with reference to the flowchart shown in FIG. S1 to S12 in the figure represent the steps of the flowchart.

First, before starting the raising and lowering of the work scaffold 5, the heights of the work scaffolds 5 adjacent to each other are adjusted to the same height, and the work scaffolds adjacent to both the upper limit switch 11 and the lower limit switch 12 are adjusted. The upper limit dog 13 and the lower limit dog 14 attached to 5 are left untouched (S1).

Then, the two adjacent work scaffolds 5 are simultaneously raised or lowered (S2).

Here, it is judged whether or not the work platform 5 is in the ascending process (S3), and when it is in the ascending process, it is judged whether or not the upper limit switch 11 hits the upper limit dog 13 and the upper limit switch is operated (S4). ), When the upper limit switch 11 operates, the ascending speed of the work scaffold 5 on the side to which the limit switch is attached is higher than the ascending speed of the other work scaffold,
The hoisting speed control device 15 is operated to slow down the hoisting speed of the work scaffold 5 on the side to which the limit switch is attached (S
5) Synchronize the rising speeds of both work scaffolds.

If the upper limit switch 11 is not operating, it is judged whether or not the lower limit switch 12 is operating (S6). If the lower limit switch 12 is also not operating, the process returns to step S4 and the limit switch Waiting for operation.

When the lower limit switch 12 operates,
Since the ascending speed of the work scaffold 5 on the side where the limit switch is attached is slower than the ascending speed of the other work scaffold, the ascending / descending speed control device 15 is actuated and the side where the limit switch is attached is operated. The rising speed of the work scaffold 5 is increased (S5), and the rising speeds of both work scaffolds are synchronized.

Further, in step S3, the work scaffold 5 is used.
Is not in the ascending process, that is, in the descending process,
First, it is determined whether or not the lower limit switch 12 has operated (S8), and when the lower limit switch 12 operates,
The descending speed of the work scaffold 5 on the side to which the limit switch is attached is higher than the descending speed of the other work scaffold, and the lifting speed control device 15 is operated to operate on the side to which the limit switch is attached. The descending speed of the work scaffold 5 is slowed down (S9) to synchronize the descending speeds of both work scaffolds.

If the lower limit switch 12 is not operating, it is judged whether or not the upper limit switch 11 is operating (S10). If the upper limit switch 11 is also not operating, the process returns to step S8 and the limit switch Waiting for operation.

When the upper limit switch 11 operates,
The descending speed of the work scaffold 5 on the side to which the limit switch is attached is slower than the descending speed of the other work scaffold, and the lifting speed control device 15 is operated to operate the scaffold 5 on the side to which the limit switch is attached. The descending speed of the work scaffold 5 is increased (S11), and the ascending speeds of both work scaffolds are synchronized.

In this way, the height shift of the adjacent work scaffolds 5 is detected by the operation of the limit switch, and the ascending / descending speed is adjusted by the ascending / descending speed control device 15 to adjust the ascending / descending speed of the adjacent scaffolds 5 for work. To synchronize.

When the ascending / descending speed is synchronized, it is judged whether or not the ascending / descending is stopped (S12). If the ascending / descending is not stopped, the step S is performed.
Return to 3 and repeat the above steps. When stopping the lifting, the process goes to END and the lifting is stopped.

In this embodiment, the work scaffolds 5 adjacent to each other are used.
As a scaffolding position detection sensor that detects the deviation of the height of the limit switch and limit dog was explained as an example, but other than this, an optical sensor that detects the position by light, a magnetic sensor that detects the position by magnetism, Alternatively, even if an ultrasonic sensor or the like that detects the position by ultrasonic waves is adopted, the same operational effect as in the case of the limit switch can be obtained.

Further, in this embodiment, the ascending / descending speed control device 15
I decided to adjust the lifting speed of the scaffold 5 for work by
Use the limit switch 11 or the limit switch 12 for the work scaffold 5 on the side where the ascending speed or the descending speed is fast.
May be stopped at the stage of operating the switch and restarted when the limit switch 11 or the limit switch 12 is no longer operating, so that the horizontal levels of both units may be maintained. Of course, various changes can be made within.

[0025]

As described above, according to the movable hoisting scaffolding of the present invention, the height of the mobile hoisting scaffold 5 adjacent to the end of the work hoisting scaffold 5 of the plurality of mobile hoisting scaffolds 1 arranged side by side. A scaffolding position detection sensor for detecting a shift is provided, and the scaffolding position detection sensor further adjoins the work scaffolding 5 when the work scaffolding 5 is moved up and down.
Since the lifting speed control device 15 that adjusts the lifting speed of the work scaffold 5 when detecting the height deviation of the work scaffold 5 is provided, when the work scaffolds 5 of the plurality of movable lifting scaffolds 10 arranged in parallel are simultaneously lifted and lowered. It is possible to automatically raise and lower the work scaffold 5 while easily synchronizing the raising and lowering speeds.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the present invention.

FIG. 3 is a flowchart showing a procedure for raising and lowering a work scaffold.

FIG. 4 is a front view showing a conventional mobile lifting scaffold.

[Explanation of symbols]

1, 10 ... Mobile lifting platform 3 ... Cart 4 ... Mast 5 ... Working platform 11 ... Upper limit switch 12 ... Lower limit switch 13 ... Upper limit dog 14 ... Lower limit dog 15 ... Lifting speed control device

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Claims (1)

[Claims] 1. In a movable lifting scaffold in which a mast is erected on a trolley capable of traveling, and a working scaffold is attached to the mast so as to be able to move up and down, an end of the working scaffold of a plurality of movable lifting scaffolds arranged side by side. Equipped with a scaffolding position detection sensor that detects the height shift between the work scaffolds of the movable hoisting scaffolds that are adjacent to each other, and the scaffolding position detection sensor detects the height between the work scaffolds when advancing and lowering the work scaffolding. A movable hoisting scaffold, comprising a hoisting speed control device that adjusts the hoisting speed of a work scaffold when a deviation is detected.