JP7346996B2 - Lifting equipment - Google Patents

Description

TECHNICAL FIELD This invention relates to lifting equipment used for moving in places with height differences.

Some overflow type dams, where the entire crown is a bridge, are equipped with an opening for the purpose of sand removal (dam sand removal gate pier). Such dams are equipped with civil engineering equipment such as sand removal gates. Civil engineering facilities are constructed, for example, on the riverbank at one end of an embankment built across a river, and measures such as fences are taken to prevent intrusion by outsiders.

Civil engineering equipment is constructed at a location higher than the top of the embankment, such as on foundations built on the riverbank. When inspecting the downstream face of the sand removal gate or the embankment body of a dam with such civil engineering equipment attached, use a ladder or other lifting equipment installed at the foundation of the civil engineering equipment to inspect the embankment body from the civil engineering equipment side. Descend to the top and perform various tasks.

As a related technology, for example, conventionally, for example, a plurality of slide ladders that are slidably connected along the length direction are connected so that the lower end is normally at a height that is out of reach of people from the ground. An evacuation ladder that is fixed by a solenoid in the contracted state, and when a release signal is input by operating an emergency switch, the solenoid is operated to lower the sliding ladder by its own weight to the lowered position where the lower end reaches the ground. There is a technology related to devices (for example, see Patent Document 1 below).

Japanese Patent Application Publication No. 2005-213996

However, in the above-mentioned conventional technology, because lifting equipment such as ladders is provided in such a way that civil engineering equipment and the top of the levee body can be accessed at all times, civil engineering equipment in rivers that are traversed by the levee body There is a problem in which a third party who crosses the top of the levee body from the opposite side of the river bank can use the lifting equipment from the top side of the levee body to invade the civil engineering equipment. there were.

Civil engineering equipment attached to a dam is equipped with various machines and structures, and if a third party with no knowledge of civil engineering equipment breaks into the equipment, unexpected accidents may occur in the equipment. There was a problem in that a third party attempting to break into the civil engineering equipment may not use the lifting equipment correctly and may fall while using the lifting equipment.

In addition, the conventional technology described in Patent Document 1 mentioned above is a one-time use structure that is intended to be used for evacuation in the event of a fire or the like occurring in a building or other building. The entire structure is supported by bringing the bottom slide ladder of a plurality of slide ladders installed so as to be slidable along the ground into contact with the ground by its own weight, and the position of the plurality of slide ladders is the same as that of the slide ladder immediately above. Since the structure is restricted only by the connecting parts, it has poor durability when used repeatedly.

If, in the technology of the prior application, a member were added to reinforce the joints between multiple sliding ladders, the overall weight and size would increase, and the load placed on the joints with buildings etc. would increase, resulting in repeated repetition over a long period of time. It is difficult to ensure safety in use. For this reason, there was a problem in that it was difficult to apply the conventional technology described in Patent Document 1 mentioned above as lifting equipment between civil engineering equipment such as a water intake facility and the top of an embankment body.

This invention solves the problems caused by the prior art described above, and thus can ensure the safety of workers when using lifting equipment and the safety of third parties when lifting equipment is not in use. The purpose is to provide lifting equipment.

In order to solve the above-mentioned problems and achieve the purpose, the lifting equipment according to the present invention is arranged at a predetermined distance vertically upward from the top of the embankment body that crosses the river, on the foundation of the civil engineering equipment installed on the riverbank. A first ladder fixed at a position so as to be movable up and down, and a second ladder slidably connected to the first ladder along the longitudinal direction of the first ladder. It is characterized by

Further, the lifting equipment according to the present invention is characterized in that, in the above invention, a hanging member is provided, one end of which is connected to the second ladder, and the other end of which is positioned near the top of the foundation of the civil engineering equipment. do.

According to the lifting equipment according to the present invention, it is possible to ensure the safety of workers when the lifting equipment is used and the safety of third parties when the lifting equipment is not in use over a long period of time.

FIG. 1 is an explanatory diagram (Part 1) showing a lifting equipment according to an embodiment of the present invention. It is an explanatory view (part 2) showing the elevating equipment of the embodiment concerning this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the lifting equipment according to the present invention will be described in detail below with reference to the accompanying drawings.

(Composition of lifting equipment)
First, the configuration of the lifting equipment according to the embodiment of the present invention will be explained. The lifting equipment according to the embodiment of the present invention is used for movement between civil engineering equipment constructed on the river bank at one end of an embankment provided across a river and the top of the embankment.

The embankment body is installed to cross the river. The embankment dams a river and stores water by raising the water level on the upstream side of the river higher than the embankment. When the water level on the upstream side of the dam reaches the height of the top of the dam, the dam releases water by overflowing the dammed water from the top of the dam to the downstream side of the river. Thereby, the flow rate on the downstream side of the river than the embankment body can be controlled.

FIGS. 1 and 2 are explanatory diagrams showing a lifting equipment according to an embodiment of the present invention. FIG. 1 shows the lifting equipment when not in use. FIG. 2 shows the lifting equipment in use. In FIGS. 1 and 2, the reference numeral 101a indicates a "first ladder" (having a plurality of rungs) on which a worker or the like can ascend and descend, and the reference numeral 101b indicates a "first ladder" (having a plurality of rungs) on which a worker or the like can ascend and descend. The figure shows a "second ladder" (with a rung). Further, the reference numeral 103 indicates the "foundation" of the civil engineering equipment. Further, the reference numeral 104 indicates a "levee body" provided across the river. Further, 105 indicates a "fence" for preventing falling from the top end 103b of the foundation 103 of the civil engineering equipment to the top end 104a of the embankment body 104. Further, reference numeral 106 indicates a hanging member. 1 and 2, a lifting equipment 100 according to an embodiment of the present invention includes a plurality of ladders 101 (a first ladder 101a, a second ladder 101b). The first ladder 101a includes a column-shaped support 102. Therefore, the longitudinal direction of the support column 102 is the longitudinal direction of the first ladder 101a.

Each of the plurality of ladders 101 is made of a material with excellent weather resistance and high strength. Specifically, the supports 102 that make up the plurality of ladders 101 and the treads that are supported in a substantially horizontal direction by the supports 102 and on which workers and others place their feet to ascend and descend are made by removing carbon and impurities from pig iron, for example. It can be formed using stainless steel, an alloy of iron and chromium, etc. Further, specifically, the struts 102 and rungs constituting the plurality of ladders 101 may be formed using, for example, galvanized steel whose surface is galvanized to improve weather resistance.

The first ladder 101a is fixed to a foundation 103 of civil engineering equipment provided on the riverbank. The first ladder 101a is fixed to the foundation 103 of the civil engineering equipment at a predetermined distance vertically upward from the top end 104a of the embankment body 104. The first ladder 101a can be fixed to the foundation 103 of the civil engineering equipment by bolting a stay made of the same material as the material used to form the pillar 102 and the tread, for example. The first ladder 101a is arranged so that the longitudinal direction of the first ladder 101a is substantially parallel to the plane formed by the wall surface 103a of the foundation 103 of the civil engineering equipment.

The first ladder 101a has one end (upper side, reference numeral 101a-1) positioned at the same level as the top 103b of the foundation 103 of the civil engineering equipment, or vertically above the top 103b of the foundation 103 of the civil engineering equipment. It is fixed to the foundation 103 of the civil engineering equipment in a protruding state. The first ladder 101a has one end (lower side, reference numeral 101a-2) opposite to the one end 101a-1 located a predetermined distance (height "H") from the top end 104a of the embankment body 104. It is fixed to the foundation 103 of the civil engineering equipment while being positioned at the same position.

Civil engineering equipment is constructed on the riverbank at one end of the embankment body 104, and workers who perform inspection work on the embankment body 104 enter the civil engineering equipment from a road constructed along the river. The top 103b of the foundation 103 of the civil engineering equipment is about the same height as the road along the river, and there is a height difference of several meters from the top 103b of the foundation 103 of the civil engineering equipment to the top 104a of the embankment body 104. There is. During inspection work, a worker descends from the top 103b of the foundation 103 of the civil engineering equipment to the top 104a of the embankment body 104 using the lifting equipment 100.

A fence 105 is provided around the top end 103b of the foundation 103 of the civil engineering equipment to prevent it from falling. The fence 105 is partially open because it moves from the top 103b of the foundation 103 of the civil engineering equipment to the lifting equipment 100. The first ladder 101a is provided at a position where a part of the fence 105 is open.

The predetermined interval (height "H") is, for example, such that the vertical lower end position of the first ladder 101a and the top end 104a of the embankment body 104 are out of reach (difficult to reach) by an adult male in the vertical direction. The intervals may be set as follows. Specifically, the predetermined interval (height "H") can be, for example, greater than the height dimension that an adult male's fingers can reach when his hand is extended above his head.

More specifically, for example, considering that the average height of a Japanese adult male is approximately 171 cm, and that a Japanese adult male with a height of 171 cm has an arm length of approximately 62 cm, it is assumed that The height at which the fingers are positioned when the hand is outstretched is a little over 2 meters. For example, when based on the physique of a Japanese adult male, and assuming that the error from the average value is 50 cm, the predetermined interval can be about 2 m and 50 cm.

Or, more specifically, the predetermined interval is, for example, the height that an adult male's fingers can reach with his hand extended above his head, plus the average value of the average jumping force (vertical jump) of an adult male. The spacing can be larger than . More specifically, for example, considering that the average vertical jump of Japanese adult men (for example, in their 20s) is approximately 50 cm, the height that an adult man's fingers can reach when his hand is stretched over his head is Adding the average value of the average jumping power (vertical jump) of an adult male, the size is approximately 2.5 m. For example, if it is based on the physique of a Japanese adult male, and if the error from the average value is 50 cm, then the predetermined interval can be, for example, about 3 m.

The second ladder 101b is arranged between the first ladder 101a and the foundation 103 of the civil engineering equipment. The second ladder 101b is slidably connected to the first ladder 101a along the longitudinal direction of the first ladder 101a. When the second ladder 101b is in the pulled-up position, the position of one end (lower side, reference numeral 101b-2) is equal to or higher than the position of the one end 101a-2 of the first ladder 101a. It is positioned in a position where

When the second ladder 101b is in the lowered position, one end 101b-2 is positioned to abut against the top end 104a of the embankment body 104. The second ladder 101b is connected to the first ladder 101a in the lowered position. Thereby, a continuous step is formed from the upper end of the foundation 103 of the civil engineering equipment to the top end 104a of the embankment body 104 by the first ladder 101a and the second ladder 101b.

The lifting equipment 100 includes a hanging member 106. The hanging member 106 is realized by a string-like or band-like member, and one end thereof is connected to one end (upper side, reference numeral 101b-1) of the second ladder 101b. Specifically, the hanging member 106 can be realized by, for example, a rope. Alternatively, the hanging member 106 may be realized by, for example, a chain or wire. When using the hanging member 106 made of a highly hard material such as a chain or wire, the chain or wire may be covered with a resin or the like.

One end of the hanging member 106 can be attached to the second ladder by, for example, providing a hook at the one end and hooking the hook to a step on the second ladder 101b, or by tying it to a step on the second ladder 101b. It is connected to the ladder 101b. One end of the hanging member 106 is not limited to the treads of the second ladder 101b, but can also be attached to a portion of the support 102 that forms a closed ring by a pair of vertically adjacent treads and the paired support 102. It may be connected to the second ladder 101b by hooking or tying it.

The length of the hanging member 106 from the position where it is connected to the second ladder 101b to the other end is longer than the length from the position where it is connected to the second ladder 101b to the top end 103b of the foundation 103 of the civil engineering equipment. . The other end of the hanging member 106 in the length direction is located near the top end 103b of the foundation 103 of the civil engineering equipment. The other end of the hanging member 106 is positioned near the top end 103b of the foundation 103 of the civil engineering equipment by, for example, providing a hook on the other end and hooking the hook to the fence 105, or by tying it to the fence 105. be able to.

If the hanging member 106 is realized by a wire, the other end may be connected to a winch. In this case, the winch may be one that uses the rotational force of a prime mover to wind up the wire, or may be one that allows an operator to manually wind up the wire using a handle.

The hanging member 106 can fix the second ladder 101b in a state where the second ladder 101b is positioned at the pulled-up position. Specifically, for example, the second ladder 101b is positioned at the pulled-up position, and the hanging member 106 is wrapped around the fence 105 in a stretched state. The other end of the hanging member 106 after being wrapped is tied to the fence 105, for example.

(How to use the lifting equipment 100)
Next, a method of using the lifting equipment 100 according to the embodiment of the present invention will be explained. When not in use, the lifting equipment 100 is fixed with the second ladder 101b positioned at the pulled-up position. Therefore, when using the lifting equipment 100, the operator first loosens the hanging member 106. Specifically, the other end of the hanging member 106 fixed to the fence 105 or the like is removed from the fence 105.

Then, while holding the hanging member 106, the operator gradually extends the hanging member 106 from the front toward the back. The hanging member 106 is extended until the position of one end (101b-2) of the second ladder 101b comes into contact with the top end 104a of the embankment body 104. Since the second ladder 101b is biased in the direction of moving to the lowered position by its own weight, the operator can easily and reliably move the second ladder 101b by simply holding the hanging member 106 loosely and letting it out little by little. can be moved to the lowered position.

Furthermore, since the second ladder 101b is biased in the direction of moving to the lowered position by its own weight, the worker does not have to step out from the foundation 103 of the civil engineering equipment in order to visually check the position of the second ladder 101b. , the second ladder 101b can be moved to the lowered position. As a result, the worker can perform the work of drawing out the hanging member 106 at a place where stable footing can be secured at the top of the civil engineering equipment, thereby ensuring the safety of the worker. Then, after moving the second ladder 101b to the lowered position, the operator wraps the other end around the fence 105 while keeping the hanging member 106 taut.

Thereafter, the worker climbs down the first ladder 101a and the second ladder 101b from the top 103b of the foundation 103 of the civil engineering equipment to the top 104a of the embankment body 104. After completing the work at the top 104a of the embankment body 104, the worker runs along the second ladder 101b and the first ladder 101a from the top 104a of the embankment body 104 to the top 103b of the foundation 103 of the civil engineering equipment. climb.

After climbing to the top 103b of the foundation 103 of the civil engineering equipment, the worker removes the other end of the hanging member 106 wrapped around the fence 105 from the fence 105 and pulls the hanging member 106 to reach the second ladder 101b. from the lowered position to the raised position. When the lifting equipment 100 includes a regulating member, the operator pulls the hanging member 106 to a position where the position of the second ladder 101b is regulated by the regulating member.

Thereby, the worker can move the second ladder 101b to the pulled-up position without stepping out from the foundation 103 of the civil engineering equipment in order to visually check the position of the second ladder 101b. As a result, the worker can pull the hanging member 106 at a location on the top 103b of the civil engineering equipment where stable footing can be secured, thereby ensuring the safety of the worker. After that, the worker moves the second ladder 101b to the pulled-up position, and then, with the hanging member 106 stretched, wraps the other end around the fence 105 to fix the second ladder 101b in the pulled-up position. and finish the work.

In the embodiment described above, the lifting equipment 100 including one second ladder 101b has been described, but the lifting equipment 100 according to the present invention may include a plurality of second ladders 101b. In this case, the plurality of second ladders 101b are slidably connected along the longitudinal direction of the first ladder 101a. Thereby, continuous steps are formed from the upper end of the foundation 103 of the civil engineering equipment to the top end 104a of the embankment body 104 by the first ladder 101a and the plurality of second ladders 101b.

Further, the second ladder 101b may include a rolling element such as a roller that is provided in the second ladder 101b and contacts the foundation 103 of the civil engineering equipment. As a result, rolling elements such as rollers roll in conjunction with the sliding of the second ladder 101b with respect to the first ladder 101a, thereby reducing the burden on the worker who slides the second ladder 101b. Furthermore, by bringing the rolling elements 103 into contact with the foundation 103 of the civil engineering equipment, the load applied by the own weight of the second ladder 101b is distributed to the foundation 103 of the civil engineering equipment via the rolling elements 103, and the second ladder 101b The load on the connected first ladder 101a can be reduced. As a result, deterioration of the first ladder 101a due to supporting the second ladder 101b and deterioration of the lifting equipment 100 due to sliding the second ladder 101b are suppressed, and over a long period of time, when the lifting equipment 100 is used. The safety of workers can be ensured.

As explained above, the lifting equipment 100 according to the embodiment of the present invention extends vertically upward at a predetermined interval ( "H") A first ladder 101a fixed at a remote location so that it can be raised and lowered, and a second ladder 101a that is slidably connected to the first ladder 101a along the longitudinal direction of the first ladder 101a. A ladder 101b is provided. Specifically, for example, a plurality of ladders 101 each having a plurality of rungs spanned over each other at predetermined intervals along the length direction of a support 102 each having a rod shape, and one of the plurality of ladders 101 A first ladder 101a located at a predetermined distance vertically upward from the top 104a of an embankment body 104 that crosses the river is fixed to a foundation 103 of civil engineering equipment installed on the riverbank, and one of the plurality of ladders 101 is Since the second ladder 101b, which is different from the first ladder 101a, is slidably connected to the first ladder 101a along the length direction of the support 102, when the lifting equipment 100 is used, the first ladder 101b By sliding the second ladder 101b relative to the first ladder 101a and positioning the second ladder 101b between the lower end of the first ladder 101a in the vertical direction and the top end 104a of the embankment body 104, A worker who inspects the area around the embankment body 104 can safely descend from the civil engineering equipment to the top end 104a of the embankment body 104. On the other hand, when the lifting equipment 100 is not in use, the second ladder 101b is slid with respect to the first ladder 101a, and the second ladder 101b is positioned at a pulled-up position overlapping the first ladder 101a. A third person who has crossed the crest 104a from the river bank opposite to the civil engineering equipment side of the river that 104 is crossing pulls down the second ladder 101b from the levee body 104 side and reaches the top of the levee body 104. Intrusion into civil engineering equipment from the end 104a side can be reliably prevented.

Furthermore, when the lifting equipment 100 is not in use, the lower end position of the second ladder 101b is the same as the lower end position of the first ladder 101a from the civil engineering equipment side, using the lower end position of the first ladder 101a in the vertical direction as a guide. Alternatively, by pulling up the second ladder 101b to a higher position, it is possible to easily and reliably set the second ladder 101b at a position where a third party cannot pull down the second ladder 101b from the embankment body 104 side. The first ladder 101a and the second ladder 101b can be overlapped. In civil engineering equipment attached to a dam, workers are often not permanently stationed, and work is performed infrequently, such as work performed by descending from the foundation 103 of the civil engineering equipment to the top 104a of the embankment body 104. The lifting equipment 100 provided in the building is used infrequently. Although measures are taken to prevent outsiders from entering the civil engineering equipment itself using fences 105 and the like, it is difficult to completely prevent outsiders from entering the embankment body 104 that crosses the river. If a ladder is permanently installed to connect such civil engineering equipment and the embankment body 104, a third party who has crossed the top 104a of the embankment body 104 installed across the river can There is a problem in that it is possible to invade civil engineering equipment from the 104a side using the lifting equipment 100. If an accident such as a third party falling from the lifting equipment 100 occurs, the equipment manager will be held responsible. On the other hand, since there is a height difference of several meters between the top 103b of the foundation 103 of the civil engineering equipment and the top 104a of the embankment body 104, it is not practical to install a ladder only during work. Additionally, temporary ladders are less safe than permanently installed ladders that are firmly fixed.

In such a situation, by installing the lifting equipment 100 according to the embodiment of the present invention, the first ladder 101a, which is located at a predetermined distance vertically upward from the top end 104a of the embankment body 104, can be used for civil engineering work. By fixing to the foundation 103 of the equipment, the lifting equipment 100 that can prevent third parties from entering the civil engineering equipment can be firmly fixed and the durability of the lifting equipment 100 can be ensured. By making the second ladder 101b slidable with respect to the ladder 101a, the safety of workers when using the lifting equipment 100, the safety of third parties when the lifting equipment 100 is not in use, and The long-term stability of the second ladder 101b connected to the first ladder 101a can be ensured. That is, according to the lifting equipment 100 of the embodiment of the present invention, the safety of workers when using the lifting equipment 100 and the safety of third parties when the lifting equipment 100 is not in use is ensured over a long period of time. be able to.

Further, in the lifting equipment 100 according to the embodiment of the present invention, the first ladder 101a is arranged on the surface of the second ladder 101b (the surface opposite to the foundation 103 of the civil engineering equipment), and The ladder 101b is placed between the back side of the first ladder 101a (the side on the foundation 103 side of the civil engineering equipment) and the foundation 103 of the civil engineering equipment, so the second ladder 101b is placed on the back side of the first ladder 101a. By providing the Since it is not possible to grab only the second ladder 101b from the front side of the equipment 100 or hook it with a hook, it is possible to prevent a third party from pulling down the second ladder 101b from the embankment body 104 side. In addition, by placing the second ladder 101b between the back side of the first ladder 101a and the foundation 103 of the civil engineering equipment, it is difficult to put hands or hooks into the back side of the second ladder 101b, and the third This can prevent someone from pulling down the second ladder 101b from the embankment body 104 side. As described above, according to the lifting equipment 100 of the embodiment of the present invention, a third party can be prevented from pulling down the second ladder 101b from the side of the embankment body 104, and It is possible to reliably prevent people from entering civil engineering equipment.

Further, the lifting equipment 100 according to the embodiment of the present invention includes a hanging member 106 whose one end is connected to the second ladder 101b and whose other end is positioned near the top 103b of the foundation 103 of the civil engineering equipment. The second ladder 101b can be slid through the hanging member 106 without touching the second ladder 101b. As a result, the second ladder 101b can be pulled up safely and easily without the worker leaning too far from the foundation 103 of the civil engineering equipment, improving the safety and convenience of the worker when using the lifting equipment 100. can be secured. Further, the second ladder 101b can be raised and lowered by the human power of the worker without using electricity. Thereby, it is possible to avoid a situation in which the elevating equipment 100 cannot be used due to a power outage or failure, and work can be performed reliably. In addition, since the momentum of the second ladder 101b when sliding from the pulled-up position to the pulled-down position can be adjusted, the second ladder 101b Damage to the ladder 101b can be reliably prevented, and the safety of workers when using the lifting equipment 100 and the safety of third parties when the lifting equipment 100 is not in use can be ensured over a long period of time.

As described above, the lifting equipment according to the present invention is useful for lifting equipment used for moving between places with height differences, and is particularly suitable for lifting equipment used for work performed by descending from a high place to a low place.

100 Lifting equipment 101a First ladder 101b Second ladder 102 Support 103 Foundation (of civil engineering equipment) 104 Embankment body 104a Top of embankment body 105 Fence 106 Hanging member

Claims (2)

The foundation of civil engineering equipment installed on the riverbank is located at a predetermined distance vertically upward from the top of the embankment body that crosses the river, so that it is approximately parallel to the slope formed by the wall surface of the foundation of the civil engineering equipment. a first ladder fixed in such a way that it can be raised and lowered;
a second ladder disposed between the first ladder and the foundation of the civil engineering equipment and slidably connected to the first ladder along the longitudinal direction of the first ladder;
Equipped with
The elevating equipment , wherein the second ladder includes a rolling element that comes into contact with the inclined surface . The lifting equipment according to claim 1, further comprising a hanging member having one end connected to the second ladder and the other end positioned near the top of the foundation of the civil engineering equipment.

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