JP2000328773A - Scaffold device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scaffold device capable of smoothly and reliably assembling a scaffold even in a narrow space part such as the inside of a furnace of a thermal power plant. SOLUTION: In this scaffold device, vertical frames 11 collapsible in a zigzag shape in the lateral direction are formed by successively connecting a plurality of gate-shaped frames 1 composed of front/rear leg rods 2 and a horizontal rod so that mutual upper/lower end parts of the front/rear leg rods 2 in the vertically adjacent gate-shaped frames 1 can freely bend, these building frames 11 are oppositely arranged in a pair, a set of scaffold units 11 are formed by respectively installing scaffold plates 13 between a pivot arranged in the bending center of a connecting part 12 bending in the rightward direction and a pivot arranged in the bending center of a connecting part 12 bending in the leftward direction, and these scaffold units 11 are connected by at least two sets by an interval holding member 15 being symmetrically arranged so that the connecting parts 12 of the same height position bend in the mutually opposite directions and having the same length as the mutual pivots in a pivot folding-up state in the connecting parts 12 bending in the mutually separating direction in the same height position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffolding device capable of assembling a scaffold smoothly and reliably even in a narrow space such as in a furnace of a thermal power plant.

[0002]

2. Description of the Related Art Conventionally, a furnace of a thermal power plant is inspected at regular intervals for internal cracks or damage. And
At the time of this inspection, since the furnace has an extremely high height in the vertical direction, a scaffold is assembled along the furnace inner wall surface, and the scaffold is used to inspect a wall surface at a high position in the furnace.

Conventionally, as such a scaffolding device, a plurality of portal frames integrally connected by horizontal bars between upper ends of the front and rear legs are provided. The upper and lower ends are connected sequentially flexibly to form a zigzag foldable building frame in the left and right direction,
A plurality of pairs of the building frames are arranged at regular intervals in the left-right direction and the gate-shaped frames opposed to the left and right sides of all the building frames are simultaneously bent in the same direction, and each bending of the adjacent left and right building frames is performed. A scaffold plate is erected between the connecting portions.After the scaffolding device is carried into the furnace in a vertically folded state, the scaffold is folded into a stacked state by pulling up the top-portion frame. 2. Description of the Related Art There is widely known an apparatus in which a portal frame is sequentially raised from the upper side to assemble a scaffold.

[0004]

However, according to the above-described conventional scaffolding apparatus, first, the upper gate-shaped frames of all the building frames are raised while being turned in one direction, for example, leftward. Since all the lower gate-shaped frames connected to these gate-shaped frames are erected while rotating to the right, all the building frames are renewed each time the gate-shaped frame is erected. They are assembled while being swung from right to left and left to right with a width equal to the height.

[0005] Therefore, it is necessary to provide a space on the left and right end sides of the scaffold device in a folded state to allow swinging of the scaffold device in the left-right direction. For example, it is necessary to arrange the scaffold device in a folded state. Even if it is installed along the lower end of the wall and the end is placed close to the inner corner wall continuous with the wall, when assembled, the gate-shaped frame of the building frame on the end side Are erected from the inner corner wall at a distance corresponding to the length of the portal frame. For example, the scaffolding can be performed along an arbitrary wall in a furnace surrounded by walls on all sides. Even when attempting to assemble the apparatus, a scaffolding device is not constructed at the inner corner of the furnace, and thus there is a problem that a separate scaffolding device must be provided at the inner corner of the furnace.

[0006] The present invention has been made in view of the above problems, and an object of the present invention is to assemble a scaffold along a wall in a furnace surrounded by walls on all sides, and to form another scaffold connected to the wall. In a state where the end portion is in contact with the wall surface, that is, the scaffold can be assembled at the inner corner of the furnace, and the work of arranging the scaffold plate can be minimized even after the scaffold device is assembled. To provide a scaffolding device.

[0007]

According to a first aspect of the present invention, there is provided a scaffolding device comprising a plurality of portal frames integrally connected by horizontal rods between upper end portions of front and rear leg rods. Individually, the upper and lower ends of the front and rear legs in the vertically adjacent gate-shaped frame are sequentially and flexibly connected so as to form a zigzag foldable building frame in the left-right direction.
Between the pivots provided between the refraction centers of the connecting portions that are opposed to each other at a certain interval in the left and right direction and refracted to the right and between the pivots provided between the refraction centers of the connecting portions refracted to the left. A set of scaffold units is formed by erection of the scaffold plates, and at least two sets of the scaffold units are symmetrically arranged so that the connecting portions at the same height position are bent in directions opposite to each other, and the same height is set. The connecting portions that bend in the direction away from each other at the vertical position are connected by a spacing member having the same length as that between the pivots in a folded state.

According to a second aspect of the present invention, in the scaffolding device according to the first aspect, the spacing member is a scaffold plate having a constant spacing in the left-right direction.

[0009]

In order to use the scaffolding device of the present invention, the scaffolding device of the present invention is first folded into a compact state in the vertical direction, and then loaded into the furnace from the loading port of the furnace. Then, the scaffold device folded in the compact state is arranged along a wall surface of the furnace inner wall on which a scaffold is to be constructed.

Thereafter, the uppermost gate-shaped frame of the scaffold unit of the scaffolding device is gradually lifted upward while maintaining the gate-shaped frames at the same height as each other, whereby the vertical direction is increased. Are sequentially displaced from the upper layer side to the straight upright state from the zigzag bent state. Then, the scaffolding device is assembled by bridging the braces between the gate frames that are adjacent in the left-right direction.

At this time, a scaffold plate is previously provided between the pivots provided between the refraction centers of the connecting portions refracting rightward of the scaffold unit and between the refraction centers of the connecting portions refracting leftward. Is installed, the scaffolding plate can be arranged between the gate-shaped frames of the scaffolding unit by the assembling work of the scaffolding unit without separately arranging the scaffolding plate.

In addition, since the pivots of the connecting portions, which are bent at the same height and separated in the same height position between the scaffold units, are connected by the spacing holding member having the same length as the pivots in the folded state, It is possible to assemble or fold the scaffolding device while vertically moving up and down without swinging the spacing member in the left-right direction in a state where the spacing between the scaffolding units arranged in the left-right direction is held at a constant interval by the spacing member. As a result, the scaffolding device can be assembled or folded along the wall surface at the inner corner in the furnace in a stable state in which the scaffolding unit is prevented from swinging in the left-right direction.

At this time, if the spacing member is formed of a scaffold plate having a constant length in the left-right direction, when the assembling of the scaffolding device is completed, the predetermined distance between the scaffold units is equal to the predetermined height. The scaffold plate is disposed between the pivots between the refraction centers of the connecting portions, so that it is not necessary to separately perform the work of disposing the scaffold plate, and it is also necessary to provide a fixed length in the left-right direction which has been conventionally used. Can be used, and it is not necessary to use a special scaffold plate whose length in the left-right direction changes.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the scaffold device of the present invention will be described with reference to the drawings. As shown in FIG. 1, a portal frame 1 constituting a scaffolding unit has tubular front and rear legs 2, 2 having a fixed length arranged side by side at predetermined intervals in the front-rear direction. A horizontal rod 3 between the upper ends of the front and rear leg rods 2 and 2
And are integrally connected by the

It should be noted that between the lower ends of the front and rear leg rods 2 and 2 and the lower surfaces of the front and rear parts of the horizontal rod 3, reinforcing rods 4 and 4 each having a J-shaped side surface are integrally provided. At the upper and lower portions of the front and rear leg rods 2, 2 are respectively provided, inwardly, pins 5 into which mounting holes formed at the left and right ends of the brace can be fitted.

Upper hinge members 6, 6 having the same structure are fixed to the upper ends of the front and rear legs 2, 2, and lower hinge members having the same structure are formed at the lower ends thereof. 7, 7 are fixed.

As shown in FIGS. 1 and 2, the upper hinge member 6 projects from the front and rear outer peripheral surfaces at the upper end of the leg rod 2 in a direction perpendicular to the horizontal rod 3 and is fixed in the front and rear direction. A pair of parallel outer pivoting projections 61, 61 spaced apart from each other, and the outer pivoting projections 61, 61 are provided on an outer peripheral surface of an upper end portion of the leg rod 2 in opposite directions, and are disposed in front and rear. It comprises a pair of inner fixing projections 62, 62 parallel to each other at regular intervals in the direction.

As shown in FIG. 1 and FIG. 2, the lower hinge member 7 is provided with inner fixing protrusions 62 of the upper hinge member 6 from the front and rear outer peripheral surfaces at the lower end of the leg rod 2.
And a pair of parallel inner pivoting protruding pieces 71, 71 protruding toward the same direction and having a certain interval in the front-rear direction,
A pair of parallel outer fixing protrusions 72 projecting from the outer peripheral surface at the lower end of the leg rod 2 in a direction opposite to the inner pivoting protrusions 71 and 71 and having a certain interval in the front-rear direction;
Consists of 72.

The interval between the outer surfaces of the inner pivoting projections 71, 71 of the lower hinge member 7 is smaller than the interval between the opposing inner surfaces of the outer pivoting projections 61, 61 of the upper hinge member 6. The distance between the outer surfaces of the inner fixing protrusions 62, 62 of the upper hinge member 6 is smaller than the distance between the opposing inner surfaces of the outer fixing protrusions 72, 72 of the lower hinge member 7. It is formed slightly narrower than that.

The outer pivoting projections 61, 61 of the upper hinge member 6 and the inner pivoting projection of the lower hinge member 7 are provided.
The inner pivoting projections 71, 71 of the lower hinge member 7 are disposed between the outer pivoting projections 61, 61 of the upper hinge member 6, respectively. The pivot holes 61a, 71a for inserting the pivot screw rod 8 for pivotally supporting the pieces 71, 71 and the outer pivoting protruding pieces 61, 61 in the front-rear direction are provided on the front and rear surfaces. It extends through it. A cylindrical member 71b is interposed between the inner peripheral end faces of the pivot support holes 71a, 71a of the inner pivoting projections 71, 71 in the lower hinge member 7.

The inner fixing projections 62, 62 of the upper hinge member 6 and the outer fixing projections 72, 62 of the lower hinge member 7,
72, the inner fixing protrusions 62, 62 are disposed between the outer fixing protrusions 72, 72, and the inner fixing protrusion 62 and the outer fixing protrusion 72 are mutually connected. Fixing holes 62a and 72a for inserting the fixing screw rod 9 for fixing in the front-rear direction are provided between the front and rear surfaces.

Furthermore, between the inner peripheral end faces of the pivot support holes 61a, 61a of the opposed outer pivot protruding pieces 61, 61 of the upper hinge members 6, 6, of the front and rear leg rods 2, 2, are the same as the pivot support holes 61a. A cylindrical pivot 10 is interposed and fixed on the axis.

The portal frame 1 is connected to its front and rear legs 2, 2
The building frame 11 is formed by connecting the upper and lower end portions of the building frame 11 in such a manner that the upper and lower end portions are sequentially bent freely and foldably connected in a zigzag shape in the left-right direction. The connection structure between the two will be described.

The upper gate-shaped frame 1 is turned left and right with respect to the lower gate-shaped frame 1, that is, the outer pivoting projection 61 of the upper hinge member 6 of the lower gate-shaped frame 1. 61 and an inner pivoting protruding piece 61 of the lower hinge member 7 in the upper gate-shaped frame 1 are opposed to each other,
The inner fixing protrusions 62 of the upper hinge member 6 in the lower gate-shaped frame 1 and the outer fixing protrusions 72 of the lower hinge member 7 in the upper gate-shaped frame 1 are opposed to each other. The inner pivoting projections 71 of the lower hinge member 7 of the upper portal frame 1 are loosely fitted between the outer pivoting projections 61 of the upper hinge member 6 of the lower portal frame 1. At the same time, the pivot screw rod 8 is inserted into the pivot holes 71a, 71a, 61a, 61a of the inner and outer pivot mounting projections 71, 71, 61, 61 so as to be positioned coaxially with the pivot 10, A bolt 8a is screwed to the tip of the connector, and the connection portion 12 is formed to be refractible by fixing (see FIG. 3).

As described above, the upper hinge member 6 of the lower gate-shaped frame 1 and the lower hinge member 7 of the upper gate-shaped frame 1 are rotatably connected about the pivot screw rod 8. The gate-shaped frames 1, 1 connected in the vertical direction can be bent in the direction in which the upper and lower opposing end surfaces of the front and rear legs 2, 2 of the upper and lower gate-shaped frames 1, 1 are separated from each other via the connecting portion 12. It is configured.

The front and rear legs 2 of the upper gate-shaped frame 1
When the front and rear legs 2 and 2 of the lower gate-shaped frame 1 are extended from the connecting portion 12, the front and rear legs 2 and 2 of the upper gate-shaped frame 1 and the front and rear of the lower gate-shaped frame 1 are extended. The leg rods 2 and 2 are in conformity with each other at their opposing end faces, and are configured to be straight in a vertical direction.

The vertically adjacent gate-shaped frames 1 and 1 are successively bent through the pivot screw rods 8 of the connecting portion 12 in a state where the frames 1 and 1 are opposite to each other as described above. Connected to form a building frame 11, FIGS. 4 and 5
As shown in the above, since the vertically adjacent connecting portions 11 and 11 are configured to bend in opposite directions to each other, the building frame 11 is connected to the portal frame 1 vertically connected, 1 are alternately bent in the left-right direction via the connecting portion 12 so that they can be folded in a zigzag shape.

Further, a pair of the above-mentioned building frames 11 is provided.
On the same horizontal plane, that is, rightward at the same height, so that the gate-shaped frames 1, 1 facing left and right of 1, 11 are bent in the same direction so as to be bent in the same direction. The connecting portions 12, 12 that bend leftward on the same horizontal plane (at the same height position) as between the pivots 10, 10 provided between the refracting centers of the connecting portions 12, 12 of the building frames 11, 11, which bend. A pair of scaffold units 14 are formed by laying scaffold plates 13, 13 which have been used in the past between the pivots 10 provided between the refraction centers.

More specifically, as shown in FIG. 4, two horizontal frames A, A made of a fixed length of steel or the like are provided on the ground.
In the front and rear direction, the front and rear legs 2, 2 of the gate-shaped frame 1 are arranged side by side at the same interval as one another, and one end of each of the horizontal frames A, A in the longitudinal direction on the upper surface thereof, Mounting portions A1 and A2 having the same structure as the upper hinge portion 7 of the gate-shaped frame 1 are provided at a portion having an interval substantially matching the length of the scaffold plate 13 from the one end to the other end. Each is standing and fixed.

Then, each of the pivotally mounted protruding pieces 61A, 61A of the mounting portions A1, A2 fixed on the horizontal frames A, A is attached to the lower gate-shaped frame 1 at the bottom of the left and right building frames 11, 11. The side hinge members 7, 7 are mounted to be rotatable left and right in the same manner as in the case of the connecting portion 12. At this time, frame 11, 11
Is the horizontal frame A at the bottom
They are connected to the mounting portions A1 and A2, respectively, so as to be folded toward the upper direction, that is, the other end side (right direction) of the horizontal frame A in FIG.

The mounting portion A of the horizontal frames A, A
The connecting portions 12, 12 corresponding to the left and right directions of the pair of building frames 11, 11 attached to 1, A2 respectively have the same height position, and the connecting portions 12, 12 at the same height are the same. The connecting portions 12, 12 which are bent in the direction and vertically adjacent to each other, are bent in opposite directions so that the pair of building frames 11, 11 can be folded zigzag in the left-right direction.

Further, a scaffold plate 13 having a fixed length in the left-right direction is installed between the pivots 10 at the same height, which are installed between the refraction centers of the connecting portions 12 of the building frames 11. By doing so, the scaffold unit 14 is configured.

Since the scaffolding unit 14 is configured as described above, the building frame 11 is vertically folded by sequentially folding the upper and lower gate-shaped frames 1 at the connecting portion 12 in the vertical direction, or In any case where the building frame 11 is assembled by vertically extending the upper and lower gate-shaped frames 1 in the connecting portion 12 in the vertical direction, the same between the left and right building frames 11 and 11 constituting the scaffold unit 14 The height position, that is, the interval between the left and right pivots 10, 10 on the same horizontal plane is constant, and thus, when the scaffold unit 14 is folded or assembled in the vertical direction, the scaffold unit 10 is erected between the pivots 10, 10. There is no unexpected situation in which the scaffold plate 13 is accidentally detached or the folding or assembly work of the scaffold unit 14 is hindered.

A pair of left and right building frames 1 configured as described above
As described above, the scaffold unit 14 composed of 1 and 11 is disposed on one half of the horizontal frame A (on the left half in FIG. 4), and has the same structure as the scaffold unit 14.
The scaffolding device is constituted by disposing the scaffold unit 14 'symmetrically with the scaffold unit 14 on the other half of the horizontal frame A (on the right half in FIG. 4). In other words, the other ends in the longitudinal direction of the horizontal frames A, A arranged side by side in front and rear, and a portion having an interval substantially corresponding to the length of the scaffold plate 13 from the other end toward one end. Attachment portions A3, A4 having the same structure as the upper hinge portion 7 of the gate-shaped frame 1 are erected and fixed, respectively.

Then, each of the pivotally mounted protruding pieces 61A, 61A of the mounting portions A3, A4 fixed on the horizontal frames A, A is attached to the left and right building frames 11,
The lower hinge portions 7, 7 of the lowermost gate-shaped frame 1 of 11 are mounted to be rotatable in the left-right direction in the same manner as in the case of the connecting portion 12. At this time, the lowermost gate-shaped frames 1 and 1 of the building frames 11 and 11 are folded toward the direction in which they overlap the horizontal frame A, that is, toward one end (left direction) of the horizontal frame A in FIG. They are connected to the mounting parts A3 and A4, respectively. Therefore, the one scaffolding unit 14 and the other scaffolding unit 14 ′ are folded symmetrically in the opposite direction with respect to the central vertical line in the length direction of the horizontal frame A in the opposite direction at the same height position. , So that it can be flexibly assembled, that is, the frame of the two scaffolding units 14,
The connecting portions 12, 12 at the same height position of 11, 11,... Are configured to be a combination refracting in a direction approaching each other and a combination refracting in a direction separating from each other.

Then, these two sets of scaffold units 14, 1
Construction frame 1 facing the center of horizontal frame A at 4 '
The distance between the mounting portions A2 and A3, which connect the lowermost gate-shaped frames 1 and 1 of 1 and 11 to bend freely, is such that these portal-shaped frames 1 and 1 are close to each other on the horizontal frame A. The height of the gate-shaped frame, to allow the folding of
That is, they are symmetrically arranged on the horizontal frame A with an interval of at least twice the length of the leg 2.

Further, in the two sets of scaffolding units 14, 14 ', they are installed between the refraction centers of the connecting portions 12, 12 of the portal frames 1, 1 opposed to the center of the horizontal frame A refracting in the direction of separation. Between each of the pivots 10, 10
A scaffold plate, which is a spacing member 15 having a length corresponding to the left-right spacing between 0 and 10, is provided and the spacing member 15 is provided.
A scaffolding device is constituted by rotatably locking the left and right ends of the
The upper end of the uppermost gate-shaped frame 1 in all the building frames 11 constituting the frames 4 and 14 'is pivoted on the lower surfaces of the upper horizontal frames B and B provided corresponding to the horizontal frames A and A. The pivots B1 to B4 are freely available. In addition, this pivot B1-B4
Are provided vertically opposed to the mounting portions A1 to A4 of the lower horizontal frames A, A, respectively. Therefore, the upper end portions of the uppermost gate-shaped frames 1, 1 in one scaffold unit 14 are provided. Pivots about the pivots B1 and B2 as fulcrums in a direction in which the upper horizontal frame B is folded toward the other end (rightward) in the length direction of the upper horizontal frame B, and the uppermost gate-shaped frame 1 in the other scaffolding unit 14 '. The upper end of 1 is a pivot B3, B4
Is pivoted in a direction in which the upper horizontal frame B is folded toward one end (left direction) in the length direction of the upper horizontal frame B.

Next, how to use the scaffolding device thus configured will be described. First, as shown in FIG. 6, the building frame 11 is carried into the furnace in a state where the gate-shaped frames 1 and 1 thereof are bent from the connecting portion 12 and folded in a zigzag manner on the horizontal frames A and A. And another wall which is installed along the lower end of one wall in the furnace and has at least one end in the longitudinal direction of the horizontal frames A, A and the upper horizontal frame B continuous with the wall at right angles. , So that the end portions of the horizontal frames A and B are located at inner corners formed between these wall surfaces.

In this state, when the upper horizontal frame B is gradually pulled up by a crane or the like, the two sets of scaffolding units 14 and 14 ′ constituting the scaffolding device have the uppermost portion (first) in each of the building frames 11. The gate-shaped frames 1-1 of FIG.
As shown in the figure, the pivotal portion 10 of the connecting portion 12 to the lower (second) gate-shaped frame 1 connected to the lower ends of these gate-shaped frames 1 is pivoted upward and erected. . At this time, the connecting portion 12 is located closer to the center in the length direction of the upper horizontal frame B with respect to the mounting portions A1 to A4 and the pivotal support portions B1 to B4 of the upper and lower horizontal frames A and B corresponding to the respective connecting portions 12. The connecting portions 12, 12 at the lower end of the second gate-shaped frame 1 and the third gate-shaped frame 1 vertically connect the mounting portions A1 to A4 and the pivoting portions B1 to B4 of the upper and lower horizontal frames A, B, respectively. When the first gate-shaped frame 1 starts to stand up, the second gate-shaped frame is moved while moving the connecting portion 12 near the center toward both side ends of the horizontal frames A and B. 1 also starts to rise upward with the connecting portion 12 with the third portal frame 1 as a fulcrum.

When the upper and lower gate-shaped frames 1 and 1 in each of the building frames 11 are completely erected until they are in a vertical state, the lower hinge member 7 in the lower end side connecting portion 12 of the first gate-shaped frame 1 is formed. The inner fixing projections 62, 62 of the upper hinge member 6 in the upper end side connection portion 12 of the second gate-shaped frame 1 are fitted between the outer fixing projections 72, 72.
The fixing holes 62a, 72a provided in the fixing holes 62, 72 coincide on the same horizontal axis, and one fixing screw rod 9 is provided between the fixing holes 62a, 72a.
And a bolt 9a is attached to the tip of the fixed screw rod 9.
Are screwed on to fix and maintain the legs 2 and 2 of the upper and lower (first and second) portal frames 1 vertically.

Thereafter, the adjacent building frames 11, 11 in the left-right direction are set.
The brace 16 is erected by fitting the insertion holes of the brace 16 to the pins 5, 5... Of the gate-shaped frame 1, 1 between the portal frames 1, 1. Move in the direction away from each other in the building frame 11 of one scaffolding unit 14 and the building frame 11 of the other scaffolding unit 14 ', which are opposed to each other on the center side, and the mounting portions A2, A3 of the upper and lower horizontal frames A, B A scaffolding plate 17 is erected between the pivots 10, 10 of the connecting parts 12, 12, which have reached the lines connecting the pivots B2, B3 vertically (see FIGS. 8 and 9).

Next, when the upper horizontal frames B, B are lifted again, the first and second portal frames 1, 1
Similarly, the third and fourth portal frames 1 and 1 connect the connecting portions 12 connecting the third and fourth portal frames 1 and 1 to both ends of the horizontal frames A and B. While moving toward the upper part, the connecting part 12 between the fourth gate-shaped frame 1 and the fifth gate-shaped frame 1 stands upright, and stands up.
When completely raised up to the vertical state, the hinge members 6, 7 fitted to each other in the same manner as described above are fixed to the fixed screw rod 9 and the bolt.
9a, connecting and fixing, attaching the brace 16, and attaching parts A2, A3 of the upper and lower horizontal frames A, B and the pivot part B.
2. A scaffolding plate 17 is erected between the pivots 10, 10 of the connecting portions 12, 12, which have moved on a vertical line connecting B2 and B3 (see FIG. 9).

Hereinafter, similarly, upper horizontal frames B, B
To raise the odd-numbered and even-numbered gate-shaped frames 1, 1 in the building frames 11, 11 constituting the scaffolding units 14, 14 ′ as a set, and to fix the frames vertically, The work of attaching the brace 16 and the scaffold plate 17 is performed to assemble a scaffolding device along the wall surface of the furnace.

During assembling of this scaffold device, FIG.
As shown in the above, the pivots 10, 10 that are bridged between the refraction centers of the opposed coupling portions 12, 12 that are located at the same height and that refract in directions away from each other (outward), Irrespective of the bending state, they always move on the vertical line connecting the mounting parts of the horizontal frames A and B and the pivots, and these pivots 10,
The spacing between 10 does not change, so horizontal frames A, B
The scaffold plate, which is the spacing member 15 erected between the pivots 10 facing the central portion of the building frame 10, is unexpectedly erected in either the vertically folded or assembled state of the building frame 11. This allows smooth assembling and folding of the entire scaffolding device without being released or hindering the folding or standing operation of the portal frame 1.

Further, the spacing member 15 keeps the spacing between the scaffold units 14 and 14 'at a constant interval, and the scaffold units 14 and 1 arranged side by side in the left-right direction.
Since the scaffold units 14 and 14 'are connected to each other to prevent the scaffold units 14 and 14' from oscillating in the left-right direction, the lifting work of the scaffold units 14 and 14 'can be performed accurately and smoothly. be able to.

When a scaffold plate is used as the spacing member 15 as described above, a part of the work of erection of the scaffold plate between the scaffold units 14 when assembling the scaffolding device is omitted. And the assembling work of the scaffolding device can be completed in a short period of time.

The same procedure as that of the connecting portion 12 is also used between the lower hinge members 7, 7 of the front and rear legs 2, 2 of the lowermost gate-shaped frame 1 and the mounting portions A1 to A4 of the horizontal frame A. The fixing hole 72a of the outer fixing protruding piece 72 of the lower hinge member 7
And one fixing screw rod 9 is inserted into and fixed to the fixing holes 62A of the inner fixing protruding pieces 62 of the mounting portions A1 to A4.
The rotation displacement of the lower hinge member 7 with respect to the mounting portions A1 to A4 is prevented.

As is apparent from the above, the scaffolding device can be assembled vertically by merely vertically pulling it up without swinging the scaffolding device to the left and right. It is possible to assemble the scaffolding device along the furnace inner wall for repair, inspection, etc. even in a narrow place.

Further, since the width of the scaffold device in the left-right direction does not change between the vertically folded state and the vertically extended assembled state, the end of the folded scaffold device can be used. By arranging the scaffolding device in contact with or close to a wall surface that is continuous with the wall surface to be assembled, the scaffolding device along the inner corner can be easily and reliably assembled.

Next, the procedure for folding the assembled scaffolding device in the vertical direction will be described. First, a fixing screw which is inserted and fixed into the fixing hole 72a of the outer fixing protruding piece 72 and the fixing hole 62A of the inner fixing protruding piece 62 of the lower hinge member 7 of the lowermost gate-shaped frame 1 and the inner fixing protruding piece 62 of the mounting portion A1. The rod 9 is removed so that the lower hinge member 7 is rotatable with respect to the mounting portion A1.

Subsequently, the braces 16 erected between the gate-shaped frames 1 and 1 adjacent to each other in the left-right direction in the lowermost layer and the gate-shaped frame 1 adjacent above the lowermost layer are removed, and the opposing scaffold units 14 and 14 are opposed to each other. Building frame 1
The scaffolding plate 17 erected between the pivots 10, 10 of the connecting portions 12, 12, which refract in the direction approaching each other, of the connecting portions 12, 11, of 1 and 11, is removed.

Further, protrusions 62 for fixing the inner and outer hinges of the upper and lower hinge members 6 and 7 constituting the connecting portion 12 between the lowermost gate-shaped frame 1 and the gate-shaped frame 1 adjacent above the gate-shaped frame 1. , 72, the fixing screw rod 9, which is inserted and fixed in the fixing holes 62a, 72a, is pulled out, so that the connecting portion 12 can be bent.

Thereafter, the connecting portion 12 between the lowermost gate-shaped frame 1 and the upper gate-shaped frame 1 adjacent to the lowermost gate-shaped frame 1 is bent so that the uppermost gate-shaped frame 1 and the uppermost gate-shaped frame 1 are connected to each other. The lower gate-shaped frame 1 adjacent to the gate-shaped frame is folded vertically from the connecting portion 12 in a zigzag manner. Then, by repeating the same procedure as described above, the scaffolding device can be easily and securely folded in the up-down direction in the up-down direction to achieve a compact state.

In the portal frame 1, the front and rear legs 2, 2
When the upper hinge member 6 is integrally provided at each of the upper end portions, and the lower hinge member 7 is integrally provided at each of the lower end portions, and the pivot 10 is erected between the opposing surfaces of the outer hinged protruding pieces of the upper hinge member 6. As shown in FIG. 10, the lower hinge member 7 is integrally provided at each of the upper end portions of the front and rear leg rods 2 and the upper hinge member 6 is integrally provided at each of the upper end portions. The pivot 10 may be provided between the facing surfaces of the outer pivotally mounted projection 61 of the member 6. In addition, the outer pivoting projection 61 of the upper hinge member 6 and the lower hinge member 7
The outer fixing protruding piece 72 is the portal frame 1 shown in FIG.
The front and rear leg rods 2 and 2 are integrally provided at the upper and lower ends of the front and rear leg rods 2 and 2 in a state of facing.

The portal frame 1 is formed in a vertically long rectangular shape by the front and rear leg rods 2 and 2, the horizontal rod 3 and the pivot 10, and has higher strength than the portal frame 1 having the portal shape. This is preferable.

[0056]

According to the scaffolding device of the present invention, a plurality of portal frames integrally connected by horizontal bars between the upper ends of the front and rear legs are provided. The end portions are sequentially connected so as to be freely refracted to form a zigzag foldable building frame in the left-right direction, and this pair of building frames is opposed to each other at a certain interval in the left-right direction and bent rightward. A pair of scaffolding units are formed by laying scaffolding plates between the pivots provided between the refraction centers of the connecting portions and between the pivots provided between the refracting centers of the connecting portions refracting in the left direction. At least two sets of scaffolding units are arranged symmetrically so that the connecting portions at the same height position are bent in directions opposite to each other, and are folded between the pivots in the connecting portions bent in the direction away from each other at the same height position. The axle in the resting state It is characterized by being connected by the spacing member having the same length as the above, so that all the gate-shaped frames of the scaffolding unit constituting the scaffolding device are stably vertically upward without swinging in the left-right direction. It is possible to assemble the scaffolding device smoothly and reliably along the furnace wall even in a narrow place such as in the furnace.

The scaffold device has the same width between the left and right ends in both the vertically folded condition and the vertically extended condition in the assembled condition. Or, when folding, no extra space is required in the left-right direction, and even in a narrow space, it is possible to smoothly and reliably assemble or fold, and arrange the end of the scaffolding device in a vertically folded state. The scaffolding device can be assembled smoothly and reliably along the inner corners by arranging and assembling it in a state in which it is in contact with the wall surface connected to the wall surface.

When a scaffold is used as the spacing member, the work of disposing the scaffold plate after assembling the scaffolding device in the up-down direction can be minimized. It can be completed in a short time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a portal frame.

FIG. 2 is a perspective view showing a state where a connecting portion is disassembled.

FIG. 3 is a perspective view showing a connecting portion.

FIG. 4 is a front view showing a part of the scaffold device of the present invention.

FIG. 5 is a front view showing a part of the building frame.

FIG. 6 is a schematic front view showing a state in which the scaffolding device of the present invention is folded up and down.

FIG. 7: Upper part (first and second from the top) of the scaffolding device of the present invention
FIG. 5 is a schematic front view showing a state in which the portal frame is lifted upward.

FIG. 8: Upper part (first and second from the top) of the scaffolding device of the present invention
FIG. 5 is a schematic front view showing a state in which the portal frame of FIG.

FIG. 9: Upper part of the scaffolding device of the present invention (first to fourth from the top)
FIG. 5 is a schematic front view showing a state in which the portal frame of FIG.

FIG. 10 is a perspective view showing another example of the portal frame.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 portal frame 2 front and rear leg rod 3 horizontal rod 6 upper hinge member 61 outer pivoting projection 61a pivot hole 62 inner fixing projection 62a fixing hole 7 lower hinge member 71 inner pivoting projection 71a pivot hole 72 Outer fixing protruding piece 72a Fixing hole 8 Pivot screw rod 9 Fixing screw rod 10 Axis 11 Building frame 12 Connecting part 13 Scaffolding plate 14, 14 'Scaffolding unit 15 Spacing member A, B Vertical horizontal frame A1-A4 Mounting part B1 ~ B4 pivot

Claims (2)

[Claims] 1. A plurality of portal frames integrally connected by horizontal bars between the upper ends of the front and rear legs, and the upper and lower ends of the front and rear legs in upper and lower adjacent gate frames can be sequentially bent. To form a building frame that can be folded in a zigzag shape in the left and right direction, and this pair of building frames is installed at a certain interval in the left and right direction and between the refraction centers of the connecting parts that refract in the right direction. A set of scaffold units is formed by erection of a scaffold plate between the provided pivots and between the pivots provided between the refraction centers of the connecting portions that bend in the left direction. At least two sets of the scaffold units are provided. The connecting portions at the same height position are arranged symmetrically so as to be bent in directions opposite to each other, and the connecting portions bent in the direction away from each other at the same height position are between the pivots in the folded state. While having the same length A foldable scaffolding device characterized by being connected by a separation holding member. 2. The scaffolding device according to claim 1, wherein the spacing member is a scaffold plate having a constant spacing in the left-right direction.