JPS63176567A - Working scaffold in tank - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] TECHNICAL FIELD The present invention relates to in-tank work scaffolding.

[Conventional technology]

For example, in the tank of a chemical tanker, when performing maintenance and inspection on the inner surface of the tank, conventionally, as shown in the 5th hull cross-sectional view, a plurality of horizontal and vertical movements are made on the inside of the skin M 032 and on the longitudinal bulkhead surface 033. In the ship's side tank 035 where the bones 034 are protruding, the worker 036 moves these horizontally and vertically moving bones 034.
You can go up and down by climbing using the
In the centerline tank 038 where the horizontal vertical movement bone 034 is not provided protruding from the uin 037, the worker 039゜040 leans a long portable ladder 041 against the longitudinal bulkhead surface 037, and the worker 042 uses it. ing.

In the same figure, 043 is the inner bottom plate, 044 is the upper deck, and 045 is the tank hatch.

However, such means have the following drawbacks.

(1) Inspection and maintenance work on the back surface of the upper deck 046 cannot be performed.

(2) Climbing using the horizontal and vertical movement bones 034' not only requires a great deal of effort, but is also an extremely dangerous task.

(3) Since the work efficiency is low, a large number of workers are required and the period on board is long.

[Problem that the invention seeks to solve]

The present invention was proposed in view of these circumstances, and
Inspection and maintenance of all the back surfaces of the top plate can be performed safely and labor-savingly.
The purpose of the present invention is to provide a scaffold for working inside a tank that can shorten the working period.

[Means for solving problems]

To this end, the present invention provides an in-tank working scaffold that is carried in and out from the tank top plate opening, which includes a telescopic column consisting of an outer column, an intermediate column and an inner column inserted coaxially, and a lower part of the telescopic column. a means attached to the telescopic support for expanding and contracting the telescopic support; a lower end fixing plate protruding from the lower end of the outer support and placed on the tank bottom plate;
The tank is characterized by comprising an upper end fixed plate that projects from the upper end of the inner support and can come into contact with the tank top plate, and a movable scaffold that moves up and down along the telescopic pick type support.

[Function] With the above-mentioned configuration, the scaffolding support is a telescopic support, which makes it easy to carry it in and out of the tank, and since fixed plates are protruded from the upper and lower ends of the telescopic support, respectively. , the support can be stably established within the tank, and a lifting cage for boarding workers can be attached along the telescopic support.

〔Example〕

One embodiment of the present invention will be explained with reference to the drawings. Figure 1 shows a cross section of a tank part showing how to use it, and Figure 2 shows a cross section of a tank part.
Fig. 3 is a partially enlarged front view showing the lifting cage shown in Fig. 2, and Fig. 4 is a plan view of Fig. 3.

In the above figure, the same symbols as in Fig. 5 indicate the same members as in the same figure, respectively. First, in Figs. When an air motor-driven strut extension winch 4 and an elevating part winch 5 are respectively attached to the horizontal flange 3 protruding from the cylindrical outer support cylinder 7 with an upper end pulley 6 protruding from the upper end thereof. is inserted into the outer support tube 1 and has a lower end pulley 8 at the lower end.
When the cylindrical first telescopic support member 10 is inserted into the first telescopic support member 7, a lower end pulley (not shown) is installed at the lower end. When protruded, a cylindrical second telescopic support tube with an upper end pulley 11 protruding from its upper end;
2 is inserted into the second telescopic support tube 10, and when a lower end pulley (1 not shown) is protruded from the lower end, the arm member 13a is attached to the pulley with a pulley 13 and 13 attached to the upper part. 15.15.15.15 A cylindrical third telescopic support with a vacuum suction type upper end fixed plate 14 protruding from the upper end, 15.15.15.15 (See Figure 3)
is the outer support tube 1. First telescopic support tube 7. Four elevating section rails 16 are provided on the surfaces of the second telescoping support 10 and the third telescoping support 12 at equal intervals in a horizontal plane and extend in a straight line in the direction of the cylinder axis. Wound around the telescopic winch 4, the middle part is the upper end pulley 6. Lower end pulley8. ″Top pulley 9. 2nd
A steel cable 17 for extending and retracting the support is sequentially hooked around the lower end pulley of the telescopic support and the upper end pulley 11, and its end is locked to the lower end of the third telescoping support 12, and the proximal end of the steel cable 17 is wound around the winch 5 for the lifting section. The middle part is hung on a pulley 13.13, and the end part is fixed to a lifting platform 29, which will be described later.A lifting cable 18 extends in the transverse direction of the ship on the inner bottom plate 043, and is connected to the front and rear in the longitudinal direction of the ship. This is a temporary scaffolding rail set up in the area.

Next, in Figs. 3 and 4, reference numeral 19 indicates a central floor plate having a square outer shape and a circular opening 20 cut out in the center for inserting the outer support tube 1; 1
Pivotally supported via springs 22 on the periphery of the two openings, each for the elevating part! ll, ll roller that fits into the ll row 15, 23.2
3.23.23 is an overhanging floor plate that is pivotally attached to each of the four sides of the central floor plate 19 via hinges 24 and can be rotated between a horizontal plane and a vertical plane, and 25 is installed detachably on the outer edge of each overhang floor plate 23. 26 is an upper leg pivoted to each of the overhanging floorboards 23, and 27 has an upper end pivoted to the lower end of the upper leg 26, and a roller 28 fitted to the scaffold moving rail 18 pivoted to the lower end. The lower leg 29 is an elevator cylinder formed by 19 to 27 working together, and 30 (see Figure 1) is 1 to 2.
In-tank working scaffold constructed by 8 working together, 31a, 31
b is each worker.

In such a structure, as shown in Fig. 1, when using the in-tank work scaffold 30, the scaffold moving rail 18° handrail 25 is first lifted using the ship's hose handling crane. , tank hatch 04
5 into the centerline tank 038, and then lower the in-tank working scaffold body into the centerline tank 038 in the same manner while keeping it as one piece.

At that time, the elevating cylinder 29 has its overhanging floor plate 23. Upper leg 26
．． Since the lower leg 27 can be folded, it is possible to pass through the tank hatch 045.

Next, the scaffold movement rail 18 temporarily installed on the inner bottom plate 043
The folded part is extended upwards, and the tank work scaffold 30 with the handrail 25 attached is placed via its roller 28, and the third telescoping support 12 etc. are extended via the support extension winch,
The upper end fixing plate 14 is pressed against the back surface 046 of the upper deck and fixed.

At that time, the in-tank work scaffold 30 is fixed at its lower end fixed plate 2. Each inner bottom plate 043. Since the back surface 046 of the upper deck is pressed, it can be established in the centerline tank 038 in a stable state.

Then, the worker 31 is placed in the elevator tube 29 in the state shown by the one-dot chain line.
The operator 31b then operates the winch 5 for the elevating section to move the elevating tube 29 to the back surface of the upper deck 046 as shown by the solid line.
Raise it to the vicinity.

In addition, when expanding the scope of inspection and repair work, roller 2
The work scaffold 30 in the tank is connected to the scaffold movement rail 18 via the
Move left and right on top.

Next, when the in-tank working scaffold 30 is to be removed, the above-mentioned procedure is reversed.

According to such a structure, the following effects can be achieved.

(1) The telescopic support of the scaffolding support has its upper end,
The back side of the upper deck via fixed plates protruding from the lower end,
It is fixed to the inner bottom plate surface and has high stability, so it is very safe.

(2) Telescopic scaffolding supports can be erected at any position on the inner bottom plate, allowing workers to approach all positions on the back side of the upper deck.
4(3) Elevating tubes for workers to board are attached along the telescopic column, which saves labor.
Safer and more efficient.

[Collection 9t1 of the invention] In short, according to the present invention, in the tank work scaffold carried in and out from the tank top plate opening, there is provided a telescopic type support consisting of an outer support, an intermediate support, and an inner support that are inserted coaxially. , a means attached to the lower part of the telescopic type support for expanding and contracting the telescopic support; a lower end fixing plate projecting from the lower end of the outer support and placed on the tank bottom plate; and a lower end fixing plate protruding from the upper end of the inner support. Equipped with a fixed upper end plate that can come into contact with the top plate of the tank, and a movable scaffold that moves up and down along the telescopic support mentioned above, inspection and maintenance of all the back surfaces of the top plate can be performed safely, with less input and labor, and with less work time. The present invention is extremely useful industrially because it provides a platform for working inside a tank that can shorten the time required for work.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional view of a tanker showing how to use an embodiment of the present invention, Fig. 2 is a front view showing the work scaffold shown in Fig. 1, and Fig. 3 is a section showing the elevator tube shown in Fig. 2. Enlarged front view, 4th
The figure is a plan view of FIG. 3. FIG. 5 is a partial cross-sectional view of a tanker showing a known in-tank working platform. 1. Outer support tube, 2. Lower end fixed plate, 3. Flange,
4. Winch for extending and retracting the support tube, 5. Winch for lifting section,
6..Lower end pulley, 7..First telescopic support tube, 8..Lower end pulley, 9..Upper end pulley, 10..Second telescopic support tube, 11..Upper end pulley, 12..Third telescopic support tube. , 13... Pulley, 13a
・・Arm member, 14・・Upper end fixed plate, 15・・Rail for lifting section, 16・・≦A cable for extending/contracting the support, 17・・Steel cable for lifting section, 18・・Rail for moving scaffold, 19・・・Central floorboard, 20.
・Opening, 21..Roller, 22..Spring, 23..Overhanging floorboard, 24..Hinge, 25..Handrail, 26..Upper leg, 27..Lower leg, 28..Roller, 29..Elevating. Order, 30... Scaffolding for working inside the tank, 31a, 31b
・・Worker, 032・・Inner surface of outer panel, 033・・Longitudinal bulkhead surface, 034・
・Horizontal vertical rib, 035...Ship side tank, 037...Longitudinal bulkhead surface, 038...Center line tank, 043...Inner bottom plate,
044... Upper deck, 045... Tank hatch, 046...
・Back side of upper deck Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] An in-tank work scaffold that is carried in and out of the tank top plate opening includes a telescopic support consisting of an outer support, an intermediate support, and an inner support that are inserted coaxially, and a lower part of the telescopic support. means for extending and contracting the telescopic strut, a lower end fixing plate protruding from the lower end of the outer support and resting on the tank bottom plate, and a lower end fixing plate protruding from the upper end of the inner support and capable of abutting against the tank top plate. A scaffold for working inside a tank, characterized by comprising a fixed upper end plate and a movable scaffold that moves up and down along the telescopic support.