JP2518837Y2 - Safety equipment for high-altitude equipment - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for high-altitude equipment intended for the safety of workers at high altitudes in high-altitude equipment such as a gate type mobile crane.

[0002]

2. Description of the Related Art Conventionally, in a safety device for high-altitude equipment, such as a gate type mobile crane, which is capable of traveling on a pair of tracks by wheels provided on both legs of a steel gate type bridge, the equipment is periodically Inspection is performed. That is, although such cranes are configured to carry heavy objects by hoists that can traverse over bridges, regular safety inspections are obliged by laws and regulations, and they are usually installed on one pedestal. An operator climbs up to the bridge from the lifting ladder and performs inspection work. Therefore, if the hoist on the bridge moves or the entire gate crane moves during this work, there is a risk that the worker will slip from a high place or be caught in the machine. Next to
Conventionally, as a safety device for preventing such a problem, for example, a device is known in which a limit switch is operated to turn off the power when a downward load is applied to a horizontal rod of a lifting ladder.

[0003]

[Problems to be Solved by the Invention] However, in the case of the above device, even if the worker climbs up the ladder and turns off the power,
It was expected that the operator would turn on the power without noticing that the worker was climbing to a high place and not confirming that the worker was working at the bottom. It is also possible to use a display board that indicates that you are working in a high place, but the procedure of displaying each time is complicated,
Further, there is a problem in that it may be almost ineffective depending on the display position, and there is a possibility that the display may be forgotten.

[0004]

SUMMARY OF THE INVENTION In order to solve such a problem, according to the present invention, one end side of one of the horizontal rods of a lifting ladder provided in a high-altitude facility is pivotally supported by a pivoting portion of a pedestal. The other end side can be freely hung and removed, and a detection unit is provided in the vicinity of the pivotally attached section to detect the hung and unhooked state of the horizontal rod. Then, when the horizontal rod is hung, the power supply to the driving unit is cut off. In addition, an explicit plate was attached to this horizontal rod.

[0005]

[Operation] When performing safety inspection work on high-altitude equipment, the ladder cannot be climbed without the horizontal rod. Therefore, when a worker applies the horizontal rod, the power to the driving unit is cut off, and the driver is accidentally operated. There is nothing to do. At this time, if the horizontal rod is provided with an explicit plate, it is automatically displayed, and the third party can be surely notified. In other words, in order to supply power to the driving unit, it is necessary to remove the horizontal rod, but at this time,
You will know for sure with the clarification board. After the worker gets off, remove the side rod so that the equipment can be operated and the ladder cannot be climbed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a safety device for high places equipment according to the present invention will be described with reference to the accompanying drawings. FIG. 1 to FIG. 3 are perspective views of the safety device, in which FIG. Figure 2
FIG. 3 is an operation view with the horizontal rod removed, FIGS. 4 and 5 are enlarged cross-sectional views of the vicinity of the pivot portion, FIG. 4 is a vertical cross-sectional view from the front, and FIG. It is a side view. In high-altitude equipment such as a gate-type mobile crane, a ladder for raising and lowering is provided on one leg of a steel bridge (not shown), and workers use this ladder at the time of safety inspection to climb up and down.

This ladder (1) has a cross section L as shown in FIG.
A pedestal (2) (3) made of a V-shaped steel, and a plurality of horizontal rods (4), (4) provided on the pedestals (2), (3) at predetermined height intervals. The horizontal rods (4) ... are set to have such width intervals as to make it difficult to move up and down at intervals other than one of them. And the safety device of the present invention (5)
One of the horizontal rods (4) is made swingable around a pivotal portion (6) described later, and a detecting portion (7) provided near the pivotal portion (6) is used. The horizontal rod (4) is configured so as to detect the unhooked state. Therefore, the pair of pedestals (2) and (3) are provided with notches (2a) and (3a) for locking the horizontal rod (4), and the notches (2a) on one side are provided. The cutout shape is U-shaped in side view, and the cutout shape of the cutout portion (3a) on the other side is L-shaped in side view.
In addition, in the vicinity of the cutout portion (3a), a horizontal rod (4) swinging around the pivotally attached portion (6) is fitted into the cutout portion (3a) and then locked so as not to come off. A hooking member (8) is provided for holding.

The pivot portion (6) is a support shaft (10) as shown in FIG. 4, and a cylindrical outer cylinder member (11) which is rotatably fitted to an upper small diameter portion of the support shaft (10). And the support shaft (1
0) is provided with an arcuate member (12) fixed to the upper end thereof, and the end portion of the horizontal rod (4) is fixed to the outer cylinder member (11). Therefore, the horizontal rod (4) can be swung in the horizontal plane around the support shaft (10). On the other hand, a shaft pin (13) as shown in FIG. 5 is fixed to the large-diameter portion below the support shaft (10) and extends rearward to form a pedestal (2).
The through-hole of the overhanging portion (14) protruding rearward from the rear surface is rotatably pierced, and the large diameter portion (13a) at the end portion cannot be removed. Therefore, the support shaft (10) has the shaft pin (1
Together with 3), it is rotatable about the central axis of the shaft pin (13), that is, the horizontal rod (4) can be swung in a vertical plane.

On the other hand, the detection unit (7) has a limit switch (15) for sending a signal to an operation drive unit of a crane or the like, and a contactor (16) for operating the limit switch (15).
The contactor (16) is provided with a roller (1
7) can come into contact with the upper surface of the arcuate member (12). When the horizontal rod (4) is applied as shown in FIG. 1, the roller (17) and the arcuate member (12) come into contact with each other, and a signal from the limit switch (15) is applied to an operation drive unit such as a crane. Turn off the power supply of. When the roller (17) and the arcuate member (12) are separated from each other, the limit switch (15) issues a signal to connect the power supply to the driving unit.

Further, an explicit plate (18) is provided on the lateral rod (4) which is swingable. For example, the surface of the clarification plate has the words "Inspection of high places" as shown in FIG. 1, and the back side has a margin as shown in FIG. Then, it is fastened to the horizontal rod (4) with the fastening fitting (19).

In the safety device as described above, the lateral rod (4) of the ladder (1) is removed in the state of FIG. 3 during normal use. When the worker climbs to the ladder (1) for safety inspection, he hangs this side rod (4).
First, the horizontal rod (4) is rotated around the shaft pin (13) in a vertical plane, and the horizontal rod (4) is lifted to a horizontal position as shown in FIG. At this time, the arc-shaped member (1
2) contacts the roller (17) and the limit switch (1
5) is activated. That is, the power supplied to the crane is cut off.

Next, a horizontal rod (4) is provided around the support shaft (10).
Rotate in the horizontal plane, and attach the tip of the horizontal rod (4) to the pillar (3).
It fits in the notch (3a) and the hooking member (8) is hooked. At this time, as shown in FIG. 1, the front side of the display plate (18) is a front surface to notify a third person that the work is in progress. In other words, in order to operate the crane or hoist, there is no other way than to remove the horizontal rod (4), but at this time, it is clear that the clear plate (18) is working. Then, when the worker finishes the safety inspection and gets off the ladder (1), the side rod (4) is removed to restore the original state.

[0013]

As described above, since the safety device for high places equipment of the present invention controls the power supply of the crane and the like by using the horizontal rod which is indispensable for climbing and descending the ladder, The danger of working in high places can be eliminated and the occurrence of human disasters can be prevented. Further, the display plate attached to the horizontal rod is automatically displayed by hanging the horizontal rod, so that it is possible to save the trouble of performing a separate display operation.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a ladder provided with the present safety device.

FIG. 2 is a perspective view of the present safety device, showing an operation during removal of the horizontal rod.

[Fig. 3] Fig. 3 is a perspective view of the present safety device, and is an operation diagram after the horizontal rod is removed.

FIG. 4 is an enlarged cross-sectional view around the pivot portion, showing a vertical cross-sectional view from the front.

5 is a sectional view taken along line XX of FIG.

[Explanation of symbols]

1. Ladder, 4. Yoko rod 5. Safety device, 6. Pivot 7. Detection unit, 18. Explicit board.

Claims (2)

(57) [Scope of utility model registration request] 1. A safety device for high-elevation equipment, which is provided with an elevating ladder and is capable of being moved by a driving operation so as to ensure work safety, at one end side of one of the horizontal rods of said elevating ladder. The base end part is pivotally supported by the pivot part of the pedestal, the other end part can be hung and released freely, and a detection part for detecting the hanging state of the horizontal rod is provided close to the pivot part, and this detection is performed. A safety device for high-altitude equipment, characterized in that the power supply to the driving unit is turned off when the horizontal rod is applied by a signal. 2. The safety device for high-place equipment according to claim 1, wherein an explicit plate is attached to the horizontal rod.