JPH11131959A - Wire rope type suspension ladder device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of oscillation and to safely use a ladder device by a method wherein an intertruss bracing rod is inserted in the intertruss bracing rod insertion bag of a wire rope type ladder, and by coupling the lower end of a rope, a working platform with a fall prevention cover is horizontally arranged. SOLUTION: A wire rope type ladder device comprises a ladder 1, an intertruss bracing means 10; a fall prevention cover 30, and a working platform 20. The intertruss bracing means 10 is formed such that a pipe insertion port 12 is formed in a fixing metal fixing 11 for a handrail, the upper end of the intertruss bracing rod insertion bag 13 having length equivalent to the length of the ladder 1 is coupled to the pipe insertion port 12, and the lower end thereof is fixed at a cap with a bottom. As aluminum pipes 14 with a constant size are connected together for extension, the pipe is inserted in an intertruss bracing rod insertion bag 13 to prevent oscillation of the ladder 1. The lower end of the wire rope 20 h hooks the hook of the collapsible working platform 20 and hooks wire ropes 2 and 2a of a trap 4 part and the working platform 20 is horizontally mounted on the latter 1. Further, the fall preventing cover 30 is attached, so that a work is effected with safety.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rope type ladder device which is fixed to an upper part of a railing of a bridge, a roof of a building or a handrail of a veranda, and used in a suspended state in a suspended state. Wire rope type suspension ladder designed to stabilize the wire rope type ladder and perform the work safely at the site where the work needs to be suspended in the air because there is no wall to support the rope type ladder. It concerns the device.

[0002]

2. Description of the Related Art A conventional wire rope type ladder is provided with an angle attached to the back side of a ramp so as to provide a space between the ramp and a wall surface when the upper portion is fixed and hung down, so that a foot can be easily hooked when going up and down. And the ladder does not swing.

[0003] However, such a wire rope type ladder, when performing a visual inspection of, for example, a gas pipe attached below a bridge girder, when the upper part is fixed to the railing of the bridge and hangs down, the ladder is in a suspended state. Therefore, when the worker descends along the ladder, as shown in FIG. 9, the foot side escapes, and the posture is not normal. For this reason, the wire rope type ladder cannot be used on the site where it is suspended.

Therefore, conventionally, when repairs and inspections are performed at a site where a wire rope type ladder cannot be used, there is no other way but to hang a ladder from below, build a scaffold, or follow a bridge or a pipe. However, there is a problem that the operation involves danger and the operation requires a long time.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wire rope type ladder device capable of completing work such as repair and inspection safely and in a short time at a site where the device is suspended in the air.

[0006]

The construction of the wire rope type ladder device according to the present invention is as follows. 1. A ramp is attached between two wires arranged in parallel at a fixed interval, and a wire rope ladder provided with a hanging means at the upper end of the wire, and a steady rest bar can be inserted in the vertical direction. Attachment of a steady rest rod insertion port, a fixing bracket which forms fixing means to a balustrade, a handrail, and a length of the wire rope type ladder from the lower end of the steady rest rod insertion port of the fixing bracket. By attaching a front part to a stub bar insertion bag and a ramp portion of the wire rope type ladder, and connecting a lower end of a hanging wire rope hanging down from a part of the wire rope of the wire rope type ladder to a rear part, a wire is provided. A workbench horizontally attached to the rope ladder, and, at the top of the workbench, by hooking both ends on a wire rope of the wire rope ladder, A fall prevention cover formed to have a size that allows an operator to enter therein, and a steady rest configured to be inserted into the steady rest rod insertion bag from the steady rest rod insertion opening of the fixing means. A wire rope type suspension ladder device consisting of a rod.

[0007] 2. An internal thread is formed at one end of a fixed-length steady rest bar, an external thread is formed on the opposite side, and an external thread can be screwed into an internal thread of another bar so that it can be added. 2. The wire rope type suspension ladder device according to the above item 1. 3. 3. The wire rope type suspension ladder device according to the above item 1 or 2, wherein the steady rest bar is constituted by an aluminum pipe.

[0008] 4. 4. The wire rope type suspension ladder device according to the above item 1 or 2 or 3, further comprising a work table configured to be able to be folded into two by connecting two treads using a hinge.

[0009] 5. The wire rope type suspension ladder device according to the above item 1, 2 or 3 or 4, wherein the fall prevention cover is constituted by a sheet. 6. The wire rope type suspension ladder device according to the above item 1 or 2 or 3 or 4, wherein the fall prevention cover is constituted by a net.

[0010] 7. Attach the suspension means of the wire rope type ladder to the railing of the bridge and suspend the hanging ladder in a suspended state, and use this to visually inspect the pipes and cables attached under the bridge girder. Said 1 which comprises and comprises
Or the wire rope type suspension ladder device according to 2 or 3 or 4 or 5 or 6.

8. Attach the suspension means of the wire rope type ladder to the roof of the building or the handrail of the veranda, suspend the hanging ladder in a suspended state, and use this to repair the piping, cables and equipment installed on the outer wall or outer wall 7. The wire rope type suspension ladder device according to the above 1 or 2 or 3 or 4 or 5 or 6, which is configured to be able to perform inspection.

[0012]

The wire rope type ladder device is assembled and used on site, and the order of assembly will be described below. 1. The mounting position of the worktable on the wire rope ladder is determined in advance. 2. A wire rope ladder is extended, for example, on the road. 3. Set the steady rest insertion bag in the fixing bracket of the wire rope ladder. 4. Set the workbench at a predetermined position on the wire rope ladder.

5. Set the fall prevention cover with the wire rope that also supports the work table on the wire rope type ladder. 6. The suspension means at the upper end of the wire rope ladder is hooked on a railing of a bridge, and the wire rope ladder is hung. 7. Secure the fixing bracket to the balustrade.

8. Set the upper end of the steady rest insertion bag in the steady rest insertion slot of the fixture. 9. A fixed-length steady rest is inserted into the steady rest insertion bag connected to the steady rest insertion opening of the fixture to the work table to complete the assembly. 10. The worker descends while attaching the safety belt to the wire rope ladder, and stands on a workbench surrounded by the fall prevention cover to perform a work such as a visual inspection or a necessary repair.

[0015]

FIG. 1 is a perspective view showing a state in which a wire rope type ladder device according to the present invention is assembled in accordance with an actual use condition. This ladder device is a wire rope type ladder 1 (hereinafter referred to as "ladder 1"). )), When the ladder 1 is hung down, the steady rest preventing means 10 for performing the steady rest, the work table 20, and the fall on the work table 20 for preventing the worker from falling down. The prevention cover 30 is a main component, and the details of each component will be described below with reference to the drawings.

The ladder 1 is a wire rope type evacuation ladder which is generally commercially available. As shown in FIG. 2, the ladder 1 has a ramp between the wire ropes 2 and 2a having hooks 3 and 3a mounted thereon. 4 and angles 5 are attached. However, in the case of the ladder 1 used in the present invention,
A wire rope ladder without angles 5 may be used.

The anti-sway prevention means 10 includes a fixing metal 11 for a railing of a bridge or a handrail of a veranda, and an upper end connected to pipe insertion ports 12 and 12a provided in the fixing metal 11, and has a length corresponding to the length of the ladder 1. And an aluminum pipe 14 having an internal thread formed at one end of the fixed length and an external thread formed at the opposite side.

FIGS. 3 (A), 3 (B), and 3 (C)
As shown in the figure, a pipe insertion port 12 (12a) is vertically attached to the tip side of the plate 11a, and the plate 1
1a, a fixing plate 11b and an inverted L-shaped pressing plate 11c are attached to the lower surface thereof, and the widths of the pressing plate 11c and the fixing plate 11b are
Adjust along 1f and attach to the balustrade, bolt 11d,
This is a structure to be fixed with a nut 11e.

As shown in FIG. 4, the sway-bar insertion bags 13 and 13a can be fixed to the pipe insertion opening 12 on the fixing bracket 11 side by attaching a tie string 13c to the upper opening 13b, and have a bottomed cap at the lower end. 13d is screw 13e, wing nut 13f
It is a configuration fixed with. As shown in FIG. 5, the aluminum pipe 14 has a structure in which an outer thread 14b is formed at an upper end of a pipe main body 14a, and an inner thread 14c is formed at a lower end, and an outer thread 14b of another pipe is screwed and fitted therein. .

As shown in FIG. 6, the work table 20 has two hinged plates 20b at the center of which are foldably connected to each other by a hinge 20a. Ribs 20c are formed on the lower surfaces of both sides of the adjustable plate 20b. Three bolt shafts 20d
By tightening wing nuts 20e to both ends of the plate, a flat shape is maintained. Reference numeral 20 f denotes an eggplant hook attached to the front of the worktable 20, which is hooked on the ramp 4 of the ladder 1. Reference numeral 20g denotes an eggplant hook attached to the rear of the work table 20, and
The hanging hook 20i at the lower end of the hanging wire rope 20h shown in FIG. 1 is hooked on the hanging hook 20g, and the hanging hook 20j at the upper end of the hanging wire rope 20h is, as shown in FIG. 2a, the work table 20 is moved to the ladder 1
Mount horizontally against.

As shown in FIG. 8, the fall prevention cover 30 has wire ropes 30b attached at regular intervals so as to cross the rectangular sheet 30a, and eggplant hooks 30c are attached to both ends of the wire rope 30b. Further, a sheet 3 is provided in the middle of the wire rope 30b.
By attaching the eggplant hook 30d so as to be exposed to the outside of 0a, hooking the eggplant hook 30c on the wire ropes 2 and 2a of the ladder 1 and passing the hanging wire rope 20h through the eggplant hook 30d, the eggplant hook 30c is attached on the work table 20. The worker can perform a predetermined operation safely in this.

Next, the order of assembling the ladder device having the above configuration will be described. The assembling work is performed on the road on the site or the like. 1. The mounting position of the worktable 20 on the ladder 1 is determined in advance. 2. The ladder 1 is extended on the ground. 3. The steady rest insertion bags 13, 13a are set on the ladder 1. 4. The work table 20 is set at a predetermined position on the ladder 1.

5. A fall prevention cover 30 with a wire rope that also serves as a support for the worktable 20 is set on the ladder 1. 6. The hooks 3 and 3a at the upper end of the ladder 1 are hooked on a railing of a bridge or the like, and the ladder 1 is hung down. 7. Fix the fixing bracket 11 to the balustrade.

8. The upper ends of the steady rest insertion bags 13 and 13a are set in the aluminum pipe insertion openings 12 and 12a of the fixing bracket 11. 9. A fixed-length aluminum pipe 1 is inserted into pipes 13 and 13a from the pipe insertion openings 12 and 12a of the fixing bracket 11, respectively.
4 is inserted while being connected to complete the assembly. 10. The worker descends while attaching the safety belt to the ladder 1, and stands on the work table 20 surrounded by the fall prevention cover 30, and performs work such as visual inspection or necessary repair.

In the above embodiment, the aluminum pipe 14
May be made of a material other than aluminum. Further, the fall prevention cover 30 is a plastic sheet in the embodiment, but may be a cotton cloth or a net-shaped one instead of the sheet. The eggplant hooks of the embodiment are used because they are easily hooked and assembled on site, but they may be connected by other means.

[0026]

The ladder device according to the present invention has the following configuration, and thus has the following effects. 1. At the time of visual inspection of gas pipes and the like attached under the bridge girder etc., since the ladder is supported vertically by anti-sway prevention means, no horizontal shake etc. occurs, even in the suspended state in the air,
The ladder can be used safely. 2. Aside from the ladder ramp, a work table is attached, and a fall prevention cover is attached on the work table, and work is performed inside the work table. 3. Including the ladder, the steady rest can be cut apart and shortened,
Since the work table can be folded into two, it is convenient because it takes up little space to carry or store. 4. Since a commercially available wire rope type evacuation suspension ladder can be used, the production cost is reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a state where a hanging ladder device according to the present invention is assembled.

FIG. 2 is an explanatory view of a commercially available evacuation ladder.

FIG. 3 is an explanatory view of a fixing bracket.

FIG. 4 is an explanatory view of an aluminum pipe insertion bag.

FIG. 5 is an explanatory view of an aluminum pipe.

FIG. 6 is an explanatory view of a work table.

FIG. 7 is an explanatory view of a hanging wire rope.

FIG. 8 is an explanatory view of a fall prevention cover.

FIG. 9 is an explanatory diagram of a situation when an attempt is made to visually inspect a gas pipe below a bridge girder using an evacuation suspension ladder.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wire rope ladder 2, 2a Wire rope 3, 3a Hook 4 ... Trap 5 ... Angle 10 Anti-sway prevention means 11 Fixture 11a Plate 11b Fixing plate 11c Holding plate 11d Bolt 11e Nut 11f Groove 12, 12a Pipe insertion port 13, 13a Steading rod insertion bag 13b Upper opening 13c String 13d Bottom cap 13e Screw 13f Wing nut 14 Aluminum pipe 14a Body 14b Outer screw 14c Inner screw 20 Work table 20a Hinge 20b Tread plate 20c Rib 20d Bolt shaft 20e Nuts hook 20f Eggplant hook 20h hanging wire rope 20i eggplant hook 20j eggplant hook 30 fall prevention cover 30a sheet 30b wire rope 30c eggplant hook 30d eggplant hook

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kentaro Hatta 7-16-2-102 Chuo, Ota-ku, Tokyo

Claims (8)

[Claims] 1. A wire rope type ladder comprising a wire wrapper having a hanging means provided at an upper end of a wire while attaching a wrap between two wires arranged in parallel at a predetermined interval, and a wobble bar in a vertical direction. Attachment of a steady-state bar insertion slot that can be inserted, and a fixing bracket formed by fixing means to a balustrade and a handrail; and a length of the wire rope ladder from a lower end of the steady-state bar insertion opening of the fixed bracket. The front part is attached to the ramp portion of the wire rope ladder, and the lower end of the hanging wire rope suspended from a part of the wire rope of the wire rope ladder is connected to the rear portion. A workbench horizontally attached to the wire-rope ladder; and, at the top of the workbench, hooking both ends to the wire rope of the wire-rope ladder Thereby, a fall-prevention cover formed to have a size that allows an operator to enter the inside thereof, and a structure in which a stabilizing rod insertion bag of the fixing means can be inserted into the steady-state rod inserting bag while being added. A wire rope type suspension ladder device comprising: 2. A fixed-length steady rest bar is formed with an internal thread at one end and an external thread on the opposite side, and can be refilled by screwing the external thread into the internal thread of the other rod. The wire rope type suspension ladder device according to claim 1, wherein the suspension ladder device is configured as follows. 3. The wire rope type suspension ladder device according to claim 1, wherein the steady rest bar is made of an aluminum pipe. 4. The wire rope type suspension ladder device according to claim 1, further comprising a work table configured to be able to be folded into two by connecting two treads using a hinge. . 5. The wire rope type suspension ladder device according to claim 1, wherein the fall prevention cover is constituted by a sheet. 6. The wire rope type suspension ladder device according to claim 1, wherein the fall prevention cover is constituted by a net. 7. A suspension means of a wire rope type ladder is attached to a railing of a bridge, and the hanging ladder is suspended in a suspended state. Using this, a visual inspection of piping and cables laid under a bridge girder is performed. Claim 1.
Or the wire rope type suspension ladder device according to 2 or 3 or 4 or 5 or 6. 8. A pipe installed on an outer wall or an outer wall surface by attaching a hanging means of a wire rope type ladder to a roof of a building or a handrail of a veranda and suspending the hanging ladder in a suspended state. The wire rope type suspension ladder device according to claim 1, 2, 3, 4, 5, or 6, which is configured to be able to repair and inspect cables and equipment.