JP2002276150A - Simplified scaffolding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide simplified scaffolding which can be easily and safely set in a tank. SOLUTION: The simplified scaffolding is set in the tank in order that a worker can conduct work for an internal peripheral surface of the tank, and comprised of a long base member, a first fixing member, a workbench, and a second fixing member. The long base member is arranged in the tank along the vertical direction, and allows the worker to vertically move along the same. The first fixing member functions to erect the base member in the tank. The workbench is connected to the base member, and functions as a scaffold for the worker during execution of work. The second fixing member has its base- side end connected to the workbench or the base member, and its front end arranged on the tank internal peripheral surface in a manner being capable of pressing the same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple scaffold installed in a tank when inspecting or repairing the inner peripheral surface of the tank.

[0002]

2. Description of the Related Art Large tanks, such as a storage tank for storing a predetermined substance in an internal space and a reaction tank for reacting a plurality of substances in the internal space, are large enough to allow a person to enter the internal space. Exists.

[0003] In the case of such a large tank, it is necessary to inspect whether the inner peripheral surface that comes into contact with the contained material is damaged by corrosion or dents, or to repair the inner peripheral surface in some cases. For example, a tank used as a reaction vessel for reacting chemicals is made of a corrosion-resistant material such as glass lining, stainless steel, titanium, PTFE, etc. Is coated, but there is a possibility that the coating may be defective due to aging.

Conventionally, when performing the above-described inspection and repair work, a worker has set up a self-supporting scaffold inside the tank, and has performed work on the inner peripheral surface of the tank using the self-supporting scaffold. That is, when performing a precise inspection using an inspection instrument or repairing the inner peripheral surface of the tank, the operator needs to work close to the inner peripheral surface of the tank. If the work location is about the height of the worker, it is possible to work while standing on the bottom of the tank, but if the height of the work location exceeds several meters, it is necessary to use a scaffold .

However, the scaffold conventionally used is a self-supporting scaffold made by appropriately assembling connecting members such as pipes, and thus requires a large number of connecting members. There is a problem that it takes time to carry in the work, assembling work and disassembling work in the tank, and the working cost increases.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a simple scaffold that can be easily and stably installed inside a tank. The purpose of.

[0007]

According to the present invention, there is provided a simple scaffold installed in a tank for an operator to perform an operation on an inner peripheral surface of the tank. A long base member disposed vertically in the tank, the base member being capable of moving up and down by an operator, and a first fixing member for standing the base member in the tank. A worktable connected to the base member and serving as a foothold for an operator at the time of work; and a base end connected to the worktable or the base member and a distal end capable of being pressed against the tank inner peripheral surface. A simple scaffold having a second fixing member is provided.

In one embodiment, the tank has a stirring shaft extending in a vertical direction, the base member is disposed along the stirring shaft, and the first fixing member holds the base member. It may be configured to be connected to the stirring shaft. or,
In another aspect, the apparatus further comprises a column standing vertically in the tank, wherein the base member is disposed along the column, and the first fixing member connects the base member to the column. To be connected.

Preferably, a protection member may be provided at a portion where the second fixing member abuts on the inner peripheral surface of the tank. Further, preferably, the base member may be configured so that the installation height of the worktable can be adjusted. Further, the base member has a vertical tree portion along a vertical direction of the tank, and a plurality of crosspieces extending laterally from the vertical tree portion, and the plurality of crosspieces are arranged in a longitudinal direction of the vertical tree portion. May be arranged along. Further, preferably, the workbench may be provided with an opening / closing door configured to be swingable upward and not swingable downward.

Preferably, the second fixing member includes a guide member connected to the worktable or the base member, and a second member fixed to the worktable or the base member at a position radially outward from the guide member in the tank radial direction. Swing member, a shaft portion formed in the shaft hole formed in the guide member, a shaft portion inserted through an insertion hole formed in the swing member, and a head provided at a radially outer end of the shaft portion in the tank radial direction. And a biasing member for biasing the swinging member so that the swinging member is inclined with respect to the guide member, wherein the biasing force of the biasing member is applied to the swinging member. When the swinging member is pivoted against the guide member and positioned so as to be substantially parallel to the guide member, the shaft portion of the pressing member is movable in the insertion hole, and the operation on the swing member is performed. When the force is released, the shaft of the pressing member is It may be a what is axially immovable by holes.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 Hereinafter, a preferred embodiment of a simple scaffold according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic side view of a simple scaffold according to the present embodiment, and FIG.
FIG. 2 is a sectional view taken along line II-II in FIG.

As shown in FIGS. 1 and 2, the simplified scaffold according to the present embodiment is applied to a tank 100 having a stirring shaft 110 extending in the vertical direction. , A first fixing member 20 for erecting the base member 10, a worktable 30 connected to the base member 10, and a base member 10. And / or a second fixing member 40 for preventing displacement of the worktable 30 with respect to the tank inner peripheral surface 100a.

The base member 10 is configured so that an operator can move up and down along the longitudinal direction, and an operator placed on the work table 30 can move the uppermost part of the tank inner peripheral surface 100a and / or the tank. The height is such that the upper surface 100c can be accessed. In the present embodiment,
The base member 10 includes a lower member 11 located below,
An upper member 12 is provided above, and the upper member 12 is connected to the lower member 11 so as to be adjustable in a longitudinal direction.

More specifically, both the lower member 11 and the upper member 12 are provided with vertical bar portions 11a,
12a, and a plurality of crosspieces 11b, 12b extending laterally from the vertical pieces 11a, 12a, and the plurality of crosspieces 11b, 12b extend along the longitudinal direction of the vertical pieces 11a, 12a. It is arranged. Therefore, the worker is required
b, 12b can be used as a scaffold so that the tank can be moved up and down in the vertical direction.

FIG. 3 is a partial longitudinal sectional side view of the base member 10. As shown in FIG. 3, in the present embodiment, a hook portion 12 d that can swing around a pivot shaft 12 c so as to be able to engage with one crosspiece portion 11 b of the lower member 11 is provided on the upper member 12. Is provided. Therefore, the hook portion 1
In the disengaged state of 2d, the upper member 12 is movable in the axial direction with respect to the lower member 11, and the hook 1
When the 2d is engaged, the upper member 12 is fixed to the lower member 11.

As shown in FIGS. 1 and 2, the first fixing member 20 is configured to fix the base member 10 along the stirring shaft 110. The first fixing member 20
Can use various fastening members such as fastening bands and U bolts.

The work table 30 serves as a scaffold when an operator works on the tank inner peripheral surface 100a, and extends sideways from the base member 10 toward the tank inner peripheral surface 100a. I have. The workbench 30 is preferably
The upper member 12 can be connected to the upper member 12 of the base member 10 so that the upper member 12 is connected to the lower member 1.
By moving the work table 30, the installation height of the work table 30 can be changed.

As shown in FIG. 2, the work table 30 has a main body 31 connected to the base member 10 and can swing upward and downward with respect to the main body 31. And an opening / closing door part 32 which is immovable. The opening / closing door portion 32 serves as a passage when an operator moves up and down the base member 10. Reference numeral 33 in FIG. 1 denotes a handrail installed on the main body 31, and reference numeral 34 denotes a handrail installed on the main body 3.
The reinforcing member extends between the base member 10 and the base member 10.

FIG. 4 is a detailed schematic view of the second fixing member. As shown in FIG. 4, the second fixing member 40 is a first guide member fixed to a workbench, the first guide member 41 having a first shaft hole 41 a formed therein, and the first guide member 4.
1 is a swing member which is swingably connected to the work table 30 inside or outside the tank in the radial direction (outside in the radial direction in the present embodiment), and has an insertion hole 42a formed therein. A swing member 42, the first shaft hole 41a and the insertion hole 42;
a pressing member 43 having a shaft portion 43a inserted in the shaft portion 43a and a head portion 43b formed at an outer end portion of the shaft portion 43a.
And a biasing member 44 for biasing the swinging member 42 so that the swinging member 42 is inclined with respect to the first guide member 41. The swinging member 42 includes the first guide member 41.
When the swing member 42 is swung against the urging force of the urging member 44 so as to be substantially parallel with respect to the shaft member 43, the shaft 43a of the pressing member 43 is moved with respect to the insertion hole 42a. When the operating force on the rocking member 42 is released, the rocking member 42 is inclined with respect to the first guide member 41, and the shaft 43a of the pressing member 43 is The insertion hole 42a is supported so as not to move in the axial direction.

The second fixing member 40 having such a configuration is used as follows. First, the first guide member 41
The swing member 42 is swung against the urging force of the urging member 44 so as to be substantially parallel to. In this state, the shaft 43a of the pressing member 43 is
It is movable with respect to 2a (see FIG. 4 (a)).
Therefore, the head 43b can be pressed toward the tank inner peripheral surface 100a by moving the shaft 43a of the pressing member 43 in the axial direction.

Next, with the head portion 43b pressed against the tank inner peripheral surface 100a, the operating force on the swing member 42 is released. As a result, the swing member 42 is urged toward the first guide member 41, and becomes inclined with respect to the first guide member 41 (see FIG. 4B). In this state, the vertical width of the insertion hole 42a is set to be smaller than the diameter of the shaft portion 43a, and therefore, the shaft portion 43a is
And is axially immovable by frictional engagement. That is, in a state where the head portion 43b presses the tank inner peripheral surface 100a, the pressing member 43 is held immovable in the axial direction.

As described above, the second fixing member 40 has a pressing state in which the pressing member 43 is held immovable in the axial direction while the head portion 43b presses the inner peripheral surface 100a of the tank. A movable state capable of moving in the axial direction can be taken.

In the present embodiment, a second guide member 45 having a second shaft hole 45a is provided outwardly of the swing member 42 in the tank radial direction. Support stabilization.

In the simple scaffold 1 having such a structure, the following effects can be obtained. As described above, the simple scaffold 1 according to the present embodiment is not a self-supporting scaffold as in the prior art, but has the base member 10 erected by the first fixing member 20 and the inner periphery of the tank of the work table 30. Face 10
The second fixing member 40 is configured to prevent the relative movement with respect to 0a. Therefore, there is no need to connect a large number of pipe members in order to be self-supporting as in the prior art, so that the number of components can be reduced. For this reason, it is possible to easily perform the transporting operation, the assembling operation, and the disassembling operation into the tank. Further, the base member 1
0 fixed to the stirring shaft 110
And a second fixing member 40 for fixing the worktable 30 to the tank inner peripheral surface 100a, and configured to be fixed to two portions in the tank of the stirring shaft 110 and the tank inner peripheral surface 100a. Therefore, it is fixed more stably than before.

Furthermore, the second fixing member 40 is
Since it is configured so that the position in the tank radial direction can be freely adjusted with respect to 0, it can be effectively used for tanks of various inner diameters without requiring additional members.
Further, in the present embodiment, as described above, since the second fixing member 40 is of a spring type using the biasing member 40, the pressing member can be moved in the axial direction with one touch. Therefore, the work of fixing the worktable and the base member to the inner peripheral surface of the tank can be performed extremely easily.

Preferably, a contact portion of the head member 43b of the pressing member 43 with the tank inner peripheral surface 100a is
An elastic member such as rubber or Teflon (registered trademark) resin can be provided, thereby effectively preventing damage to the tank inner peripheral surface 100a. In particular, a corrosion-resistant coating layer may be applied to the inner peripheral surface 100a of the tank, but the provision of the elastic member can effectively prevent the coating layer from being damaged.

In the present embodiment, the upper member 12 to which the work table 30 is connected is connected to the lower member 11.
The height of the work table 30 can be appropriately adjusted without providing an additional member, since the position of the work table 30 can be adjusted so as to be adjustable. Therefore, work can be efficiently performed on the tank inner peripheral surface 100a of various heights.

Embodiment 2 Hereinafter, another embodiment of the simplified scaffold 1 'according to the present invention will be described with reference to the accompanying drawings. FIG. 5 shows a schematic side view of the simple scaffold 1 ′ according to the present embodiment. In addition,
The same or corresponding members as in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 5, a simple scaffold 1 'according to the present embodiment is a tank 100' of a type having no stirring shaft.
It is configured to be applied to. That is, the simple scaffold 1 ′ is provided with a column 50 that stands upright along the vertical direction in the tank in addition to the configuration in the first embodiment.
It has.

The column 50 is, for example, a tank bottom 100.
b and the tank upper surface 100c so as to be erected under a narrow pressure state. Specifically, a base portion 51a installed on the tank bottom surface 100b and a shaft extending upward from the base portion 51a Base member 51 having a threaded shaft portion 51b having a thread formed on the outer peripheral surface thereof.
And a cylindrical member 52 having a threaded axial hole 52a formed with a thread to be screwed with the threaded shaft portion 51b of the base member 51.
And a contact member 5 extending upward from the upper end of the cylindrical member 52.
3 is provided.

In the simple scaffold having such a structure, the same effect as that of the first embodiment can be obtained by fixing the base member 10 to the column 50.

It should be noted that the second fixing member 40 is not limited to the illustrated form, but may employ various configurations. For example, the pressing member 4 is screw-connected.
3 can also be connected to a workbench. Further, instead of connecting the second fixing member 40 to the work table 30, it is also possible to connect the second fixing member 40 to the base member 10.

[0033]

According to the simple scaffold according to the present invention, there is provided a long base member arranged vertically along the inside of the tank, wherein the base member allows an operator to move up and down. A first fixing member for erecting the base member in the tank; a work table connected to the base member to serve as a foothold for an operator during work; and a base end connected to the work table or base member. In addition, since a second fixing member whose tip is pressed against the inner peripheral surface of the tank is provided, it can be fixed to at least two portions in the tank by the first and second fixing members. Therefore, it can be stably installed in the tank while having a configuration in which the number of parts is greatly reduced as compared with a conventional self-standing scaffold. That is, according to the simple scaffold according to the present invention, it can be stably installed in the tank, and as in the conventional self-standing simple scaffold,
It is not necessary to connect a large number of pipe members in order to be self-supporting, so that the number of components can be reduced to simplify the work of transporting into the tank, assembling work, and disassembling work.

[Brief description of the drawings]

FIG. 1 is a schematic side view of an embodiment of a simplified scaffold according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a partial vertical sectional side view of a base member in the simple scaffold shown in FIG. 1;

FIG. 4 is a partial longitudinal side view of a second fixing member in the simple scaffold shown in FIG. 1, FIG. 4 (a) shows a state where the second fixing member is not pressed against the tank inner peripheral surface, and FIG. 4B shows a state where the inner peripheral surface of the tank is pressed.

FIG. 5 is a schematic side view of another embodiment of the simple scaffold according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1 'Simple scaffold 10 Base member 11 Lower member 11a Vertical bar 11b Cross bar 12 Upper member 12a Vertical bar 12b Cross bar 20 First fixing member 30 Work table 32 Opening door 40 Second fixing member 41 First guide member 42 swing member 42a insertion hole 43 pressing member 44 urging member 100 tank 110 stirring shaft

Claims (8)

[Claims] 1. A simple scaffold installed in a tank for an operator to work on an inner peripheral surface of the tank, the elongate scaffold being disposed in the tank in a vertical direction. A base member that allows the worker to move up and down; a first fixing member for setting the base member upright in the tank; and a base member connected to the base member, and And a second fixing member having a base end connected to the work table or the base member and a front end capable of being pressed against the inner peripheral surface of the tank. . 2. The tank has a stirring shaft extending vertically, the base member is disposed along the stirring shaft, and the first fixing member connects the base member to the stirring shaft. The simple scaffold according to claim 1, wherein the scaffold is configured to be connected. 3. The apparatus according to claim 1, further comprising a column vertically provided in the tank, wherein the base member is disposed along the column, and the first fixing member attaches the substrate member to the column. The simple scaffold according to claim 1, wherein the scaffold is configured to be connected. 4. The scaffold according to claim 1, wherein a protection member is provided at a portion where the second fixing member abuts on the inner peripheral surface of the tank. 5. The simple scaffold according to claim 1, wherein the base member is configured to adjust an installation height of the worktable. 6. The base member has a vertical tree part along a vertical direction of the tank, and a plurality of horizontal trees extending laterally from the vertical tree, wherein the plurality of horizontal trees is a vertical tree part. The simple scaffold according to any one of claims 1 to 5, wherein the scaffold is disposed along a longitudinal direction of the scaffold. 7. The work table according to claim 1, further comprising an opening / closing door configured to be swingable upward and not swingable downward. The simple scaffold described in. 8. A guide member connected to the worktable or the base member, and the second fixing member is swingably connected to the worktable or the base member at a position radially outward of the guide member from the guide member. A swing member, a shaft portion formed in the shaft hole formed in the guide member, a shaft portion inserted in an insertion hole formed in the swing member, and a head portion provided at a radially outer end of the shaft portion in the tank radial direction. And a biasing member for biasing the swinging member so that the swinging member is inclined with respect to the guide member, wherein the swinging member is biased by the biasing force of the biasing member. When the swinging member is swung against the guide member and is positioned so as to be substantially parallel to the guide member, the shaft portion of the pressing member is movable in the insertion hole, and the operating force on the swinging member is increased. Is released, the shaft of the pressing member is inserted by the insertion hole. Simple scaffold according to any one of claims 1 to 7, characterized in that are axially immovable.