JP2017166289A - Rapidly assemblable scaffold - Google Patents

Abstract

To provide a quick assembly scaffold that can be carried by human power and can be quickly assembled.
SOLUTION: A carriage that can move on a track, four support bodies standing on the carriage, and a work floor that is attached to an upper end of the support body, the work floor of the carriage It can be moved up and down by a lifting jack provided on the upper surface, and the column body is a ladder shape that can be expanded and contracted following the lifting and lowering of the work floor, and a jack base fixed on the carriage is inserted into a lower end to insert the top of the carriage Quick assembly scaffold standing up in
[Selection] Figure 1

Description

  The present invention relates to a scaffold used in high-altitude work close to an overhead line in a railway business line.

High-altitude work (night work) close to the overhead line in the railway business line is performed according to the following flow.
(1) After closing the track, enter the track and transport the material to the work site, and perform preparatory work such as installation of the foundation part of the scaffold (2) After stopping the feeding, assemble the scaffold (3) This work ( 4) Complete the dismantling of the scaffold by the cancellation of the feeding stop (5) After confirming tidying up, exit from the track before releasing the track closure

  As such a working platform for working at high places, various working platforms such as a lifting / lowering working table and a folding working table are used in addition to a single pipe scaffolding and a rolling tower.

Japanese Patent Laid-Open No. 08-1000051 JP2015-105544A

In order to work at high altitudes during night work on the railway business line, it is necessary to stop power transmission. If the scaffold is brought close to the overhead line before stopping the feeding, an induced current may flow through the scaffold, so the scaffold cannot be brought closer to the overhead line before stopping the feeding.
The scaffold assembly work needs to be performed quickly after stopping the feeding, but the work scaffolds conventionally used require 37% of the average feeder stopping time for assembly and disassembly in the track.
The ratio of the assembly / disassembly time is a problem that presses down the work time.

  An object of the present invention is to provide a quick assembly scaffold that can be carried by human power and can be quickly assembled.

1st invention of this application made in order to solve the said subject, The cart which can move on a track, Four props standing up on the cart, The work floor attached to the upper end of the prop, The work floor is movable up and down by an elevating jack provided on the upper surface of the carriage, and the column body is a ladder shape that can expand and contract following the raising and lowering of the work floor, and is fixed on the carriage. A quick assembly scaffold is provided in which the jack base is inserted into the lower end and is erected on the carriage.
The second invention of the present application is the quick assembly scaffold according to the first invention, wherein the lifting jack is a pantograph jack that opens and closes as the bolt shaft attached to the carriage rotates. provide.
The third invention of the present application is the quick assembly scaffold of the first invention or the second invention, wherein the work floor is composed of a floor plate, a handrail that is foldable around the floor plate, and a hatch provided on the floor plate, The hatch provides a quick scaffold characterized in that when the work floor is attached to the upper end of the column body, one side of the hatch is substantially flush with any one of the column bodies.

The present invention can obtain at least one of the following effects by means for solving the above-described problems.
(1) Quick assembly and disassembly is possible, and the power interruption time can be effectively utilized.
(2) Can be assembled and dismantled by hand on the station premises and on the track.
(3) It can be transported on the track to the site, and this work time can be secured for a long time.

Explanatory drawing of the quick assembly scaffold of the present invention Illustration of cart and support Illustration of support Illustration of work floor Side view showing folded state of handrail on work floor Side view showing fixed state of prop body and work floor Side view showing open / closed state of work floor hatch Side view of lifting jack Explanatory drawing of assembly method of quick assembly scaffold of this invention (location of carriage) Explanatory drawing of assembly method of quick assembly scaffold of the present invention (arrangement of support body) Explanatory drawing of assembly method of quick assembly scaffold of the present invention (work floor layout) Explanatory drawing of assembly method of quick assembly scaffold of the present invention (arrangement of lifting jack) Explanatory drawing of assembly method of quick assembly scaffold of the present invention (handrail development) Explanatory drawing of the assembly method of the quick assembly scaffold of the present invention (raising the work floor) Explanatory drawing of assembly method of quick assembly scaffold of the present invention (work start)

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[1] Rapid assembly scaffold.
<1> Configuration of quick assembly scaffold.
The rapid assembly scaffold of the present invention includes a carriage 1, four support columns 2 standing on the carriage 1, a work floor 3 attached to an upper portion of the support body 2, a lifting jack 4 for raising and lowering the work floor 3, (FIG. 1).

<2> Bogie.
The carriage 1 is a substantially rectangular member in plan view in which wheels 11 are provided on the lower surface and a jack base 12 is erected on the upper surface (FIG. 2).
Since the rapid assembly scaffold of the present invention is used on a track, the wheels 11 are arranged according to the track.
Two jack bases 12 are erected in the direction parallel to the track in the vicinity of the four corners of the carriage 1 for each column 2.

<3> A support body.
The column bodies 2 are arranged at the four corners of the carriage 1.
The column body 2 has a ladder shape, and has a structure in which the vertical tree 21 can be expanded and contracted and can be fixed at a predetermined height (FIG. 3).
The column body 2 is erected on the carriage 1 by inserting the jack base 12 into the lower end of the vertical tree 21 so that the crossbar 22 is parallel to the track.
Since the rapid assembly scaffold of the present invention is used on a track, it is necessary to adjust the height according to the cant. Since the jack base 12 is inserted into the lower end of the column body 2, the height can be adjusted by the jack base 12.
An outrigger 23 is pivotally mounted on the vertical tree 21 of the column body 2.

<4> Work floor.
The work floor 3 is a member that is arranged across the upper end of the column body 2.
The work floor 3 includes a floor plate 31, a handrail 32 attached around the floor plate 31, and a hatch 33 provided on the floor plate 31 (FIGS. 4, 5, and 7).
The handrail 32 can be folded to the floor board 31 side. Further, the wide side floor portion 321 is foldably attached to the side side (side substantially parallel to the track) side of the floor board 31 and the handrail 32 is attached to the end side thereof. When the widened floor portion 321 is folded, the lateral width of the work floor 3 is within the vehicle limit.
A sheath pipe 34 is provided on the lower surface of the work floor 3 at a position corresponding to the upper end of the support body 2, the upper end of the support body 2 is inserted into the sheath pipe 34, and the lock passes through the sheath pipe 34 and the support body 2 from the side. The pillar body 2 and the work floor 3 are fixed by the pins 341 (FIG. 6).
The column body 2 is a ladder for an operator to climb the work floor 3, and a separate ladder for raising and lowering is not required, and the number of components is reduced.

<4.1> Hatch.
The hatch 33 opens and closes an opening 331 formed in the floor board 31 (FIG. 7).
The hatch 33 has a hinge 35 attached to one side and is attached to the opening 331 via the hinge 35.
The hatch 33 is flush with the floor plate 31 when closed, and is pushed upward from the floor plate 31 via the hinge 35 when opened.
At this time, by attaching the sheath pipe 34 to the lower surface in the vicinity of the side of the hatch 33 and the opening 331 to which the hinge 35 is attached, the hatch 33 opened when the hatch 33 is opened and the column body 2 positioned at the lower part are continuous. The worker who has climbed up the column-shaped support body 2 can easily pass through the hatch 33.
A hatch stay 332 is provided on the lower surface of the hatch 33 to serve as a support when the worker ascends from the column body 2 onto the work floor 3.
By reversing the direction of the work floor 3, the position of the hatch 33 with respect to the track can be selected.

<5> Elevating jack.
The lifting jack 4 includes a pantograph 41 formed by combining a plurality of links 411 and a bolt shaft 42 connected to the link 411a at the lower end (FIG. 8).
The link 411 is obtained by pivotally supporting a plurality of rod-like arms 412 in an X shape with pins 413, and the links 411 a and b pivot the ends of the arms 412 with pins 413.
The bolt shaft 42 supports the vicinity of both ends via a bearing 43 attached to the carriage 1.
A hexagonal bolt head 421 is provided at one end of the bolt shaft 42.
A female screw 44 is screwed onto the bolt shaft 42.
One end of the link 411 a at the lower end of the pantograph 41 is pivotally supported by the carriage 1, and the other end is pivotally supported by the female screw 44.
Accordingly, when the bolt head 421 is rotated, the female screw 44 is reciprocated by the rotation of the bolt shaft 42, and the angle of each link 411 is changed to expand and contract the pantograph 41. The bolt head 421 can be easily expanded and contracted by turning with a wrench or the like. A crank-shaped handle may be attached to the bolt head 421 and the bolt head 421 may be rotated via the handle.
A link 411 b at the upper end of the pantograph 41 connects the slide rail 45 attached to the lower surface of the work floor 3.
One end of the link 411b is pivotally supported in the vicinity of the end of the slide rail 45, and the other end is slidably connected to the slide rail 45.
When the bolt shaft 42 is rotated by these mechanisms, the work floor 3 to which the slide rail 45 of the lifting jack 4 is attached is moved up and down by the expansion and contraction of the pantograph 41.
Two lifting jacks 4 are provided in parallel along the track, and the work shaft 3 can be lifted and lowered in a horizontal state by simultaneously rotating both bolt shafts 42.

[2] Construction of a quick assembly scaffold.
Next, a method for constructing a quick assembly scaffold will be described.

<1> Confirmation of track closure.
After the last train, confirm that the track is closed.

<2> Arrangement of carts.
The cart 1 that has been brought into the vicinity of the track in advance is placed on the track (FIG. 9A).
Since the carriage 1 is provided with wheels 11 and a jack base 12 on a flat plate, it can be easily carried into the track by human power.
When used in a canted position, the cant adjustment is performed with the left and right jack bases 12.

<3> Arrangement of support bodies.
The lower end of the column body 2 to which the outrigger 23 is attached is inserted into the jack base 12 of the carriage 1 and fixed (FIG. 9B). The outrigger 23 is attached to the vertical tree 21 a on the end side of the carriage 1 out of the two vertical trees 21 a and b of the column body 2.
Since the outrigger 23 is pivotally mounted on the column 2, it can be accommodated within the track width depending on the home position or the like.
Since the support body 2 has a ladder shape that can be expanded and contracted, it can be easily carried into the track by human power.

<4> Arrangement of work floor.
The upper end of the column body 2 is inserted into the sheath tube 34 of the work floor 3, penetrates the lock pin 341, and the work floor 3 is fixed (FIG. 9C).
The work floor 3 is in a state in which the handrail 32 is folded and the column body 2 is also contracted, and the distance from the overhead line of the work floor 3 is about 3 m.
Since the cant adjustment is performed by the jack base 12, the work floor 3 is substantially horizontal.

<5> Arrangement of lifting jack.
A lifting jack 4 is mounted on the carriage 1.
The slide rail 45 of the raising / lowering jack 4 is attached to the lower surface of the work floor 3 (FIG. 9D).
Since the raising / lowering jack 4 consists of the pantograph 41 and the bolt shaft 42, it can be easily carried into the station premises by human power.

<6> Move to the site.
After confirming that the jack of the outrigger 23 is raised, the quick assembly scaffold is moved to the site. By moving on the track, it can be easily transported to the site.
Since the work floor 3 has no widened floor portion 321 deployed, the vehicle limit is secured, and the side of the platform can also be moved.
Before the work floor 3 is lifted, the distance from the overhead line of the work floor 3 is about 3 m. Therefore, the work floor 3 can be transported to the site without waiting for the power supply to be stopped, and this work time can be secured for a long time.

<7> Work floor rise.
After arriving at the site and confirming that feeding has stopped, the handrail 32 on the work floor 3 is deployed (FIG. 9E).
And the bolt shaft 42 of the raising / lowering jack 4 is rotated with a wrench, a handle, etc., the raising / lowering jack 4 is extended, and the work floor 3 is raised. The work floor 3 is raised only by turning it with a wrench, a handle or the like, and can be raised easily in a short time.
Since the upper end of the column body 2 is fixed to the work floor 3, it extends as the work floor 3 rises.

<8> Fixing the work floor.
After raising the work floor 3 to the height set on the day, the lifting jack 4 is lowered a little and the work floor 3 is supported by the support body 2. The column body 2 is fixed at a predetermined height.

<9> Installation of braces.
After raising the work floor 3 to the height set on the day, a bracing 24 to be used for this height is prepared in advance, and spanned between the left and right props 2 at the end of the carriage 1, The two are fixed (FIG. 9F).
The braces 24 have a known shape in which the midpoints are pin-coupled.
The braces 24 and the struts 2 are joined by passing the holes provided at the four end portions of the braces 24 through known gravity locks attached to the upper ends and the end portions of the struts 2.
The braces 24 can also be configured to be extended or shortened.

<10> Work started.
The worker climbs the ladder-like column body 2 and pushes up the hatch 33 to rise onto the work floor 3 and start work (FIG. 9G).
Since the ladder-like column 2 within the range of the carriage 1 is climbed, it can be climbed safely.
Since the handrail 32 is unfolded on the work floor 3 when the worker goes up, it becomes a foothold in front of the handrail and satisfies the occupational safety and health regulations.

<11> After the work is finished.
When the work is completed, the braces 24 are removed, the fixing of the height of the column body 2 is released, the lifting jack 4 is contracted, and the work floor 3 is lowered. The operation of shrinking the lifting jack 4 is only to turn the bolt shaft 42 with a wrench, a handle or the like, and can be easily lowered in a short time.
Then, the handrail 32 is folded to the minimum height.
Since the minimum height can be easily obtained, the feeding stop time can be effectively used.
Then, the jack of the outrigger 23 is lifted, moved on the track and carried to the carry-out position, the lifting jack 4, the work floor 3, and the column body 2 are removed, the cart 1 is carried out, and the work is completed.

  Since the tool used from assembly to the end of work is only a wrench or the like, carbon monoxide is not discharged.

1 Carriage 11 Wheel 12 Jack Base 2 Column 21 Vertical Bar 22 Crossbar 23 Outrigger 24 Bracing 3 Work Floor 31 Floor Plate 32 Handrail 321 Widening Floor 33 Hatch 331 Opening 332 Hatch Stay 34 Sheath Tube 341 Lock Pin 35 Hinge 4 Lifting Jack 41 Pantograph 411 Link 412 Arm 413 Pin 42 Bolt shaft 43 Bearing 44 Female thread 45 Slide rail

Claims (3)

A dolly that can move in orbit,
Four support columns standing on the carriage,
A work floor attached to the upper end of the column body,
The work floor can be moved up and down by a lifting jack provided on the upper surface of the carriage,
The said support | pillar body is a ladder shape which can be expanded-contracted following the raising / lowering of the said work floor, The quick assembly scaffold which inserts the jack base fixed on the said trolley | bogie at the lower end, and stands on the trolley | bogie. The quick assembly scaffold according to claim 1,
The quick assembly scaffolding according to claim 1, wherein the elevating jack is a pantograph jack that opens and closes as a bolt shaft attached to the carriage rotates. In the quick assembly scaffold according to claim 1 or 2,
The work floor is composed of a floor plate, a handrail that is foldable around the floor plate, and a hatch provided on the floor plate,
The hatch is attached to the floor plate so that the opening can be opened and closed via a hinge attached to the opening provided in the floor plate,
The quick scaffolding according to claim 1, wherein one side of the opening having the hinge is substantially flush with any one of the pillars when the work floor is attached to an upper end of the pillar.

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