JPH1046799A - Traveling type elevator scaffolding with plurality of masts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely move up and down a scaffolding board without any trouble, even upon the occurrence of the deflection of an intermediate scaffolding board, when the intermediate scaffolding board is installed between the boards of a traveling type elevator scaffolding, and synchronously moved up or down. SOLUTION: An inclination sensor 11 is fitted to the vicinity of the center of an intermediate scaffolding board 7 laid between the scaffolding boards 5a and 5b of a plurality of traveling type elevator scaffolding 1a and 1b erected side by side. Then, the real inclination of the board 7 is detected with the inclination sensor 11 and if the inclination of the board 7 is identified, the ascending or descending speed of the scaffolding boards 5 and 5b is corrected via an elevator speed control device 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile climbing scaffold in which a working scaffold is attached to a mast erected on a bogie so as to be able to move up and down. The present invention relates to a multi-mast movable climbing scaffold in which an intermediate work scaffold is erected between a plurality of scaffolds and integratedly moved up and down.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, a movable climbing scaffold 1 has a mast 4 erected on a carriage 3 having running wheels 2, and a working scaffold 5 is attached to the mast 4 so as to be able to move up and down. ,
There is one that raises and lowers the working scaffold 5 up and down along the mast 4 by the motor 6, and this movable lifting scaffold is arranged on the side of the building at the time of building work, and depending on the place of the building work It is used for moving the entire cart, moving up and down a working scaffold to secure a working scaffold at a construction site, carrying in materials, and elevating workers.

When the work surface is large or when it is necessary to carry in a long material, for example, as shown in FIG.
Two mobile lifting scaffolds 1a and 1b are arranged side by side, an intermediate work scaffold 7 is erected between adjacent work scaffolds 5a and 5b, and connected by connecting pins 8 as shown in FIG. A work scaffold 5a between the work scaffolds 5a and 5b;
In some cases, limit switches 9a and 9b are provided for detecting a displacement between the intermediate work 5b and the intermediate work scaffold 7.

In this mobile climbing scaffold, when the climbing speeds of a plurality of working scaffolds are synchronized and the working scaffold and the intermediate working scaffold are simultaneously moved up and down while being kept at the same height, each work scaffold may be moved for some reason. When a difference occurs in the synchronization speed of the work scaffold, the limit switch detects a shift in the relative position of each work scaffold, and adjusts the lifting / lowering speed of the work scaffold in a direction to eliminate the shift of the work scaffold. I have.

[0005]

However, as described above, in the method of detecting the positional shift between the working scaffold and the intermediate working scaffold by the limit switch, when a load is loaded on the intermediate working scaffold, the intermediate working scaffold is displaced. Because the central part of the body is bent downward and both ends are curved upward, a displacement occurs between the working scaffold and the intermediate working scaffold,
There is a problem that the limit switch for detecting the displacement is actuated to cause an operation to correct the ascending and descending speed even though there is no difference in the ascending and descending speed.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a multi-mast movable lifting and lowering scaffold which can safely raise and lower the working scaffold without any trouble even if the intermediate working scaffold is bent.

[0007]

In order to achieve the above object, the present invention provides a multi-mast movable climbing scaffold according to the first aspect of the present invention, in which a work scaffold can be freely moved up and down on a mast erected on a bogie. A plurality of movable climbing scaffolds are juxtaposed, and an intermediate working scaffold is erected between adjacent working scaffolds to move up and down. An inclination sensor for detecting the inclination of the work scaffold is provided in the vicinity, and an elevation speed control device for adjusting the elevation speed of the work scaffold when the inclination sensor detects the inclination of the intermediate work scaffold is provided. Features.

According to a second aspect of the present invention, the tilt sensor includes a pendulum in which a weight is fixed to a lower end of a suspended arm which rotatably supports an upper end thereof. It is characterized by a pendulum type tilt sensor provided with a damper for adjusting the swing speed of the pendulum and a swing detecting element for detecting the swing of the pendulum.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a first aspect of the present invention, there is provided a multi-mast movable climbing scaffold, wherein an intermediate working scaffold is erected between a plurality of movable climbing scaffolds adjacent to each other. When the operation is performed in synchronization with the ascending / descending speed, if the ascending / descending speed of the working scaffold on one side is high and a height shift occurs between the scaffolds on the other side, the intermediate working scaffold is inclined. become.

When the intermediate work scaffold is tilted, a tilt sensor disposed near the center of the work scaffold detects the tilt, and the elevation speed control device adjusts the elevation speed of each work scaffold in a direction to correct the inclination. I do. Further, since the tilt sensor is disposed near the center of the intermediate work scaffold, the load is loaded on the intermediate work scaffold, and the work detection scaffold simply bends near the center, whereby the tilt detection sensor detects the tilt. No detection is performed, and the ascending / descending control is performed without correcting the ascending / descending speed.

Further, in the multi-mast movable climbing scaffold according to the second aspect of the present invention, the tilt sensor is a pendulum type, and the pendulum is provided with a damper capable of adjusting the swing speed, so that it can be used for intermediate work. Suppression of the swing of the pendulum due to vibration when the scaffold is raised and lowered can be operated as an inclination sensor only when the intermediate work scaffold is actually inclined, so that it is not necessary to operate the elevation speed control device more than necessary. .

[0012]

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

FIG. 1 shows a multi-mast movable scaffold constructed by arranging two movable scaffolds according to the present invention. The basic construction is substantially the same as the known multi-mast movable scaffold shown in FIG. The components are the same, and the same components are denoted by the same reference numerals.

In the multi-mast mobile climbing scaffold of the present invention, a pendulum-type inclination sensor 11 is mounted on the bottom surface near the center of the intermediate work scaffold 7 as an inclination sensor.

As shown in FIGS. 2 and 3, the pendulum-type tilt sensor 11 has a pivot shaft 13 fixed to the upper end of the arm 12.
Is rotatably mounted on a bearing 15 disposed above the support frame 14 and is suspended therefrom.
And the pendulum 17 is formed so as to be swingable.

A damper cylinder 18 having a braking function for adjusting the swinging speed of the pendulum 17 to an appropriate speed is attached to the arm 12 so that vibrations and the like transmitted from the intermediate work scaffold 7 and tilting of the pendulum 17 can be achieved. The pendulum 17 is prevented from swinging more than necessary.

As shown in FIG. 4, a limit switch 19 for detecting the swing of the weight 16 of the pendulum 17 is provided.
a, 19a ', 19b, and 19b' are provided. The limit switch 19a indicates that the movable lifting platform 1a side of the intermediate work platform 7 has been lowered.
'Indicates that the mobile lifting platform 1b has been raised, the limit switch 19b has detected that the mobile lifting platform 1a has been raised, and the limit switch 19b' has detected that the mobile lifting platform 1b has been lowered. The inclination of the scaffold 7 can be grasped.

The limit switches 19a, 19a ',
Reference numerals 19b and 19b 'are connected to a lifting / lowering speed control device 20.
The moving speed of each of the movable climbing scaffolds 1a and 1b is controlled based on the inclination signals detected by a, 19a ', 19b and 19b'.

Thus, when the work is performed by the multi-mast mobile lifting scaffold of the present invention, each mobile lifting scaffold 1a,
For example, as shown in FIG. 5, when the ascending speed of the movable scaffold 1a is lowered in synchronization with the ascending speed of the movable scaffold 1b, the working scaffold 5a of the movable scaffold 1a becomes slower. When it comes to the front, the intermediate work scaffold 7 is inclined. When the intermediate work scaffold 7 is inclined, FIG.
As shown in FIG. 5, the pendulum 17 of the pendulum type inclination sensor 11 disposed near the center of the intermediate work scaffold 7 is inclined and contacts the limit switches 19b and 19b ', so that the intermediate work scaffold 7 is as shown in FIG. Is detected.

The detection signal is output to the lifting / lowering speed control device 20. The lifting / lowering speed control device 20 slows down the lifting speed of the work platform 5a on the side of the movable lifting platform 1a, and also performs the work on the side of the mobile lifting platform 1b. The inclination of the intermediate work scaffold 7 is eliminated by controlling the ascending speed of the work scaffold 5b to be faster.

As shown in FIG. 7, when the load is concentrated near the center of the intermediate work scaffold 7 and the intermediate work scaffold 7 is simply bent only in the vicinity of the center, the pendulum type inclination sensor is used. Since the eleven pendulum 17 does not tilt, it does not touch any of the limit switches 19a, 19a ', 19b, 19b', and no correction of the ascending / descending speed of each movable scaffold 1a, 1b is performed.

As described above, when the intermediate work scaffold 7 is not inclined but is bent only in the vicinity of the central portion, a displacement occurs at the connecting portion between the work scaffolds 5a and 5b and the intermediate work scaffold 7. However, since the inclination sensor is arranged near the center of the intermediate work scaffold 7, the inclination situation is accurately detected only when the intermediate work scaffold 7 is truly inclined without being influenced by the inclination sensor. Thus, safe lifting control is enabled.

[0023]

As described above, according to the multi-mast movable lifting scaffold according to the first aspect of the present invention, a plurality of movable lifting scaffolds 1a, 1b are provided between the working scaffolds 5a, 5b. A lifting / lowering speed control device 20 which is provided with a tilt sensor near the center of the arranged intermediate working scaffold 7 and adjusts the lifting / lowering speed of each of the working scaffolds 5a, 5b in accordance with the output of the tilt sensor.
Therefore, when the work scaffolds 5a and 5b of the movable climbing scaffolds 1a and 1b are moved up and down to move the intermediate work scaffold 7 up and down, when a difference occurs in the elevation speed of the work scaffolds 5a and 5b, It is possible to detect the inclination of the intermediate work scaffold 7 and adjust the lifting speed of the work scaffolds 5a and 5b. Also,
By arranging the inclination sensor near the center of the intermediate work scaffold 7, even if the intermediate work scaffold 7 simply bends near the center, it is not necessary to judge that the entire intermediate work scaffold 7 is tilted. It is not necessary to correct the elevating speed of the work scaffolds 5a and 5b, and safe elevating control can be performed.

According to a second embodiment of the present invention, a pendulum-type tilt sensor 11 is employed as a tilt sensor, and a pendulum swing is mounted on an arm 12 of the pendulum-type tilt sensor 11. Since the damper cylinder 18 for adjusting the speed is provided, unnecessary swinging of the pendulum due to vibration or the like at the time of elevating and lowering can be suppressed, and only the necessary inclined state of the intermediate work scaffold 7 can be detected.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a multi-mast movable climbing scaffold according to the present invention.

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

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a view taken in the direction of arrows AA in FIG. 2;

FIG. 5 is an explanatory view showing a state where the intermediate work scaffold is inclined.

FIG. 6 is an explanatory view showing a state in which the pendulum of the pendulum type inclination sensor is inclined.

FIG. 7 is an explanatory view showing a state where the intermediate work scaffold is bent at the center.

FIG. 8 is a schematic configuration diagram showing a conventional mobile climbing platform.

FIG. 9 is a schematic configuration diagram showing a conventional multi-mast movable climbing scaffold.

FIG. 10 is an enlarged view of a main part of FIG. 9;

[Explanation of symbols]

1, 1a, 1b: mobile climbing scaffolding 3: trolley 4: mast 5, 5a, 5b
... Work scaffold 7 ... Intermediate work scaffold 11 ... Pendular tilt sensor 12 ... Arm 16 ... Weight 17 ... Pendulum 18 ... Damper cylinder 19a, 19a'19b, 19b '... Limit switch 20 ... Elevating speed control device

Claims (2)

[Claims] 1. A plurality of movable lifting scaffolds having working scaffolds mounted on a mast erected on a carriage so as to be able to move up and down, and an intermediate working scaffold is erected between adjacent working scaffolds to move up and down. In the mobile climbing scaffold with multiple masts,
A tilt sensor for detecting the inclination of the work scaffold is provided near the center of the intermediate work scaffold, and when the tilt sensor detects the inclination of the intermediate work scaffold, the lifting and lowering speed of the work scaffold is adjusted. A multi-mast, mobile climbing scaffold comprising a speed control device. 2. The tilt sensor according to claim 1, wherein the tilt sensor comprises a pendulum having an upper end rotatably supported and a weight attached to a lower end of a suspended arm; a damper for adjusting a swing speed of the pendulum; 2. The multi-mast movable scaffold according to claim 1, wherein the scaffold is a pendulum-type tilt sensor provided with a swing detecting element for detecting movement.