JPH09328768A - Safety device for work in channel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safey device for work in a channel which has no possibility of being swept away. SOLUTION: A safety device for work in a channel comprises a fixed ladder 10 installed in a manhole of a channel, an expansible ladder 20 which can be extended to reach the base in a horizontal pipe by sliding and elevating the ladder along the fixed ladder 10 and can be stored in the fixed ladder 10, and a lateral material 40, the base of which is journalled to an expansible ladder horizontal shaft 24 provided on the forward end part of the expansible ladder 20, and which can be laid on the base in the horizontal pipe and be stored in the expansible ladder 20. The forward end part of the lateral material 40 is provided with a safety fence 61 which is fitted thereto through a link mechanism 70, and can be erected to be spread laterally and be stored in the lateral material 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water channel such as a water intake channel of a power plant, which is a vertical pipe (almost vertical water channel).
Is used when performing work such as inspection and cleaning by descending from a manhole into a horizontal pipe (almost horizontal waterway) nearby, especially to prevent workers from falling from the horizontal pipe into the vertical pipe. Related to the work safety device in a waterway.

[0002]

2. Description of the Related Art FIG. 8 shows a side cross section of an intake channel of a power plant. The horizontal pipe 91 that is guided from either the left or right of the figure cannot go straight because there is a river 95, so it falls down by the vertical pipe 92 before the river 95, and the bottom bottom pipe 94 of the river, etc. that dives under the river 95. When you pass under the river 95, go up by the vertical pipe 92 and go to the other horizontal pipe 9
A series of water channels is formed by connecting to 1. Horizontal pipe 91
A manhole 93 for workers to enter and exit from the ground is provided in the. When a worker enters the horizontal pipe 91 from the manhole 93 by a ladder to perform inspections, cleaning, etc., the waterway is slippery, and if it falls from the horizontal pipe 91 into the vertical pipe 92, a personal injury may result. Conventionally, a fence has been fixedly provided near the position where the horizontal pipe 91 is connected to the vertical pipe 92 so as to prevent a person from falling.

[0003]

The conventional work safety device in a waterway is as described above, but the fence fixed to the waterway is worn or corroded by the water flow, and a part of the fence is detached. There is a problem that there is a risk of being washed away, and serious damage may occur if the washed matter hits the runner or the like.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an in-waterway work safety device that can be used easily and easily and that is not likely to be washed away due to wear or the like.

[0005]

SUMMARY OF THE INVENTION A work safety device in a waterway according to the present invention comprises a fixed ladder attached to a manhole and a fixed ladder that can be slid up and down on the fixed ladder to reach a bottom surface in a horizontal pipe. A retractable ladder that can be stored in and a base that is axially attached to the horizontal axis of the retractable ladder that is provided at the tip of this retractable ladder and can be laid down on the bottom surface of the horizontal pipe so that it can be stored in the retractable ladder. And a safety fence that is attached to the tip of this laid-over material via a link mechanism and that can be erected and expanded laterally and that can be stored in the laid-over material. is there.

When using the in-waterway work safety device according to the present invention, the telescopic ladder is slid on the fixed ladder and extended until it reaches the bottom surface in the horizontal pipe, and the crossover member is laid down on the bottom surface in the horizontal pipe. The fence is erected by the link mechanism and expanded laterally. Workers use fixed ladders and telescopic ladders to descend into the horizontal pipe and perform inspections and cleaning. The safety fence prevents accidents where workers fall into the vertical pipe during work in the horizontal pipe. After the work is completed, the safety fence is folded up and stored in the horizontal collapsed material, and the horizontal collapsed material is stored in the telescopic ladder, and the worker who came out of the manhole by the telescopic ladder and the fixed ladder slides the telescopic ladder on the fixed ladder. Then pull it up and store it in the fixed ladder. With this, the work safety device in the waterway is pulled up from the horizontal pipe and housed in the manhole so that it is not exposed to the water flow in the waterway and there is no risk of loss.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a work safety device in a waterway according to the present invention will be described below with reference to the drawings. 1 to 4 are perspective views showing various states of the work safety device in a water channel, and FIGS. 5 to 7 are side views showing a usage state in a water intake channel of a power plant. 1 to 7, 1
Reference numeral 0 denotes a fixed ladder, which is provided so as to be connected to a pair of fixed ladder girder members 11, a guide 12 for an expansion and contraction ladder formed on the fixed ladder girder member 11, and an upper end portion of the fixed ladder girder member 11. The fixed ladder horizontal shaft 13, the fixed ladder girder material 11, and a footrest 15 which is a horizontal bar provided in plural at a predetermined interval. The intermediate portion of the fixed ladder 10 is shown in FIGS.
Are omitted in.

In FIGS. 1 to 7, reference numeral 20 denotes an expansion / contraction ladder, which is a pair of expansion / contraction ladder girder members 21 and an expansion / contraction ladder girder member 2 so as to be slidably fitted in the expansion / contraction ladder guides 12 of the fixed ladder 10.
1. The slide fitting portion 22 formed in 1, the expansion / contraction ladder horizontal shaft 24 provided so as to be connected to the lower end of the expansion / contraction ladder girder member 21 and the expansion / contraction ladder girder member 21 are provided at predetermined intervals. It is composed of a footrest 25, which is a horizontal bar provided in plurality.
The ladder expansion / contraction device is an expansion / contraction ladder winder 31 provided on an upper portion of the fixed ladder girder 11, and an expansion / contraction ladder wound around the expansion / contraction ladder winder 31 with the other end attached to the upper end of the expansion / contraction ladder girder 21. It consists of hanging ropes 33 and the like. Reference numeral 40 denotes a horizontal sloping member, and the base end portion is passed so as to be connected to a pair of the horizontal sloping material girder members 41 and the tip end portions of the horizontal sloping material girder members 41 pivotally attached to the expandable ladder horizontal shaft 24. It is composed of a horizontal falling member horizontal axis 46, a link movement guide 47, and the like. The horizontal sloping material raising / lowering device is provided in the middle of the extendable ladder girder material 21 wound on the horizontal sloping material winding machine 51 provided on the fixed ladder girder material 11 and the horizontal sloping material winding material 51. Guide rail 54
The other end is composed of a laying material suspension line 53 for laying material and the like attached to the tip end portion of the laying material girder material 41 via.

1 to 4, 61 is a safety fence, 7
Reference numeral 0 denotes a safety fence raising / lowering mechanism for raising and lowering the safety fence 61. The safety fence raising / lowering mechanism 70 includes a pair of the first link member 71 and the second pair.
Link material 72, third link material 73, fourth link material 74,
Safety fence up / down winding machine 77, safety fence up / down rope 78, guide pulley 7
It consists of 9 mag. The first link material 71 is axially attached to the tip end portion of the laterally inverted material girder material 41 and the tip end portion of the fourth link material 74,
The second link material 72 has the same length as the first link material 71, and the laterally inverted material girder material 4 is parallel to the first link material 71.
1 and the fourth link member 74 are pivotally attached. One end of the third link material 73 is axially attached to the center of the second link material 72, and the other end is fitted in the link movement guide 47 so as to slide. The safety fence up-and-down winder 77 is provided so as to rotate the telescopic ladder horizontal shaft 24, and the safety fence up-and-down cable 78 is wound around the telescopic ladder horizontal shaft 24 and provided on the horizontal overturning material horizontal shaft 46. The other end is attached to the slide end of the third link member 73 via the guide pulley 79. The pair of safety fences 61 are attached to the fourth link member 74 by hinges so that the pair of safety fences 61 can be expanded to the left and right. The width of the safety fence 61 when it is expanded is formed so as to fill the width of the horizontal pipe 91. Further, a fixing means (not shown) is provided so as to be fixed to the fourth link member 74 in that state when the safety fence 61 is expanded.

1 to 7, the fixed ladder girder member 11 is firmly attached to the wall surface of the manhole 93. Further, the depth dimension of the fixed ladder girder material 11 is such that the telescopic ladder 20 accommodating the lateral collapse material 40 accommodating the safety fence raising / lowering mechanism 70 and the safety fence 61 can be accommodated. Further, the height of the safety fence 61 when the safety fence raising / lowering mechanism 70 stands up is set to an appropriate height to prevent a person from falling.

Next, a method of using the work safety device in a waterway shown in FIGS. 1 to 7 will be described. This in-waterway work safety device is used when inspecting or cleaning the waterway as shown in FIG. Especially, when the worker enters from the manhole 93 and inspects and cleans inside the horizontal pipe 91,
The main purpose is to prevent the worker from falling into the vertical pipe 92.

When the work safety device in a waterway is not used, the telescopic ladder 20 is stored in the fixed ladder 10 attached to the wall surface of the manhole 93 as shown in FIG. Since there is no projecting portion in the horizontal pipe 91, the work safety device in the waterway is not worn away or corroded by the water flow in the waterway. The extendable ladder 20 accommodates the laterally collapsed material 40, and the laterally collapsed material 40 accommodates the safety fence 61, the safety fence raising / lowering mechanism 70, and the like.

When using this in-waterway work safety device, first, as shown in FIG. 6, the telescopic ladder 20 is hung and lowered until the lower end of the telescopic ladder 20 reaches the bottom surface of the horizontal pipe 91. The operation of lowering the telescopic ladder 20 is to unwind the telescopic ladder winder 31 and loosen the telescopic ladder suspension ropes 33. The portion 22 slides on the telescopic ladder guide 12 of the fixed ladder 10 and descends according to its own weight. At the same time, it is necessary to unwind the winding device 51 for the overturned material and extend the suspension rope 53 for the overturned material.

Next, as shown in FIGS. 4 and 7, the laying member 40 is laid down and laid on the bottom surface of the horizontal pipe 91. The operation is performed by unwinding the rollover device 51 for the lying-down material, and
The force pulling the tip end portion of the laterally-inclined beam girder material 41 via the guide pulley 54 of 3 is relaxed, and the laterally-inverted material suspension rope 53 extends out.
The laying member 40 rotates counterclockwise in the figure about the expandable ladder horizontal axis 24 due to its own weight, and as shown in FIG.
It falls down and lies on the bottom of the horizontal tube 91.

Next, the worker steps on the foot 15 of the fixed ladder 10.
Then, the limbs 25 of the telescopic ladder 20 are placed, the limbs are passed through the manhole 93, and the bottom of the horizontal pipe 91 is descended. Horizontal pipe 91
The worker descending to the bottom of the
The safety fence up-and-down winding machine 77 is rotated to wind up the safety fence up-and-down rope 78. The safety fence raising / lowering line 78 pulls the tip end portion of the third link material 73 to the left side in the drawing via the guide pulley 79. The tip portion of the third link material 73 moves to the left in the figure along the link movement guide 47, and the third link material 73 raises the second link material 72. When the second link material 72 stands up, the first link material 71
Also, the fourth link member 74 and the safety fence 61 also come to the standing position. When the first link member 71 and the second link member 72 are in the upright position as shown by the chain line in FIGS. 1 and 7, the tip end of the third link member 73 hits the stopper of the link movement guide 47, and the safety fence is raised. The position and posture of the tilting mechanism 70 are fixed in an upright state.

After raising the safety fence raising / lowering mechanism 70, FIG.
As shown in FIG. 5, the safety fences 61 on both sides are spread out right next to each other, and the safety fences 61 are fixed to the fourth link member 74 by fixing means (not shown). With this, the installation and installation of the work safety device in the waterway is completed, so that the worker performs work such as inspection and cleaning of the inside of the horizontal pipe 91. The safety fence 61 extending right and left to near the wall surface of the horizontal pipe 91 prevents the worker from falling from the horizontal pipe 91 to the vertical pipe 92. Also, the vertical pipe 92
When working near, the safety belt of the worker may be hung on the safety fence 61.

After the inspection and cleaning of the inside of the horizontal pipe 91 are completed, in FIG. 1, the safety fence 61 is folded and the safety fence up / down winding machine 77 is turned in the opposite direction to wind up the safety fence up / down rope 78. If you put it out,
The tip end of the third link member 73 moves to the right in the figure along the link movement guide 47, and the safety fence raising / lowering mechanism 70 pivots clockwise in the figure to fall as shown in FIG. As shown in FIG. 3, the safety fence raising / lowering mechanism 70 can be housed in the sideways member 40. The worker goes out to the ground through the manhole 93 by the foot rest 25 of the telescopic ladder 20 and the foot rest 15 of the fixed ladder 10. Next, the rollover device 51 for the overturned material is wound up and pulled by the suspension rope 53 for the overturned material, and as shown in FIG.
0 is rotated in the clockwise direction about the horizontal axis of the telescopic ladder 24 and stored in the telescopic ladder 20. As shown in FIG.
After storing 0 in the telescopic ladder 20, the telescopic ladder winder 31 is wound, and the telescopic ladder 20 is hoisted by the telescopic ladder suspension ropes 33, and the telescopic ladder 20 is fixed to the fixed ladder 1 as shown in FIG.
Store in 0. Since the storage of the work safety device in the waterway is completed, the manhole 93 can be covered with a manhole cover (not shown) to pass water through the waterway. In this state, this in-waterway work safety device is housed in the manhole 93, and since there is no part protruding into the horizontal pipe 91, it is not exposed to running water, and there is no risk of loss due to wear or corrosion.

In the above description of the embodiments with reference to the drawings, only one set of the expandable ladder 20 and the horizontal collapse member 40 is shown. However, for example, the horizontal pipe 91 with respect to the vertical length of the manhole 93 is shown. Telescopic ladder 20 when the height is large
The slide expansion / contraction length can be increased by providing two or more steps. In addition, the vertical pipe 92 is located from directly below the manhole 93.
In the case where the horizontal distance to the vicinity is long, it is also possible to provide two or more continuous laying members 40 and make it a slide type or a folding type to increase the length of stretching. Although only one safety fence 61 is shown on each side in FIG. 1, two or more safety fences 61 may be provided.

[0019]

As described above, according to the present invention, the fixed ladder attached to the manhole, the telescopic ladder which can be slid up and down, the sideways material which can be laid down sideways, and the tip end of which can be raised and lowered sideways. Because it was constructed with a deployable safety fence,
The safety fences prevent workers from falling into the waterways by these ladders from falling accidents. After the work is completed, the safety fences, etc. are stored in the fallen material, the fallen material is stored in the telescopic ladder, and the telescopic ladder is stored in the fixed ladder. It will not be exposed to the flow of water in the waterway, and there will be no fear of loss.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of an in-waterway work safety device according to the present invention in a developed state.

FIG. 2 is a perspective view showing an embodiment of the in-waterway work safety device according to the present invention in a state in the middle of expansion or storage.

FIG. 3 is a perspective view showing an embodiment of the in-waterway work safety device according to the present invention in a state in the middle of expansion or storage.

FIG. 4 is a perspective view showing an embodiment of an in-waterway work safety device according to the present invention in a state in which it is being developed or stored.

FIG. 5 is a side view in a stored state showing an embodiment of the in-waterway work safety device according to the present invention.

FIG. 6 is a side view showing an embodiment of the in-waterway work safety device according to the present invention in a state in which it is being developed or stored.

FIG. 7 is a side view showing an embodiment of the in-waterway work safety device according to the present invention in a state in the middle of expansion or storage.

FIG. 8 is a side sectional view showing the shape of a water channel.

[Explanation of symbols]

10: Fixed ladder, 11: Fixed ladder girder material, 12: Guide for telescopic ladder, 15: Foot rest, 20: Telescopic ladder, 21:
Telescopic ladder girder material, 22: slide fitting part, 24: lateral axis of telescopic ladder, 25: foot rest, 31: telescopic ladder winder, 3
3: Stretchable ladder suspension rope, 40: Horizontally laid material, 41: Horizontally laid material girder material, 46: Horizontally laid material horizontal axis, 47: Link movement guide, 5
1: Winding machine for lying down material, 53: Suspension rope for lying down material, 54:
Guide pulley, 61: Safety fence, 70: Safety fence tilting mechanism, 7
1: 1st link material, 72: 2nd link material, 73: 3rd
Link material, 74: 4th link material, 77: Safety fence upright winding machine, 78: Safety fence upright rope, 79: Guide pulley, 91:
Horizontal tube, 92: vertical tube, 93: manhole.

Claims (1)

[Claims] 1. A fixed ladder attached to a manhole connected to a horizontal pipe of a waterway, and a fixed ladder that can be slid up and down to extend to reach the bottom of the horizontal pipe and can be stored in the fixed ladder. An expansion and contraction ladder, and a basement member axially attached to the expansion and contraction ladder horizontal axis provided at the distal end of the expansion and contraction ladder, which can be laid down on the bottom surface of the horizontal pipe and can be stored in the expansion and contraction ladder. A work safety device in a waterway, comprising a safety fence which is attached to the tip end of this laid-over material through a link mechanism so that it can be erected and expanded laterally and is provided so that it can be stored in the laid-over material.