JPH07317300A - Working scaffolding - Google Patents

Abstract

PURPOSE:To house and transport a working scaffolding compactly, and to ensure sufficient strength and rigidity against bending moment simply by folding a leg body on the lower side of a stage and folding the stage in a pivotally attaching section. CONSTITUTION:A stage section 1 is divided into a pair of left and right stages 2a, 2b while being rotatably connected between a developed state and a folded state/in a pivotally attaching section 3. The pivotally attaching section 3 is composed of connecting brackets 7a, 7b fixed at the opposed end sections of both stages 2a, 2b, pivotally supporting sections 8a, 8b formed so as to be mutually superposed in the longitudinal direction at places at lower proper distances in the stages 2a, 2b in the connecting brackets 7a, 7b, and one pivotally supporting shaft 9 pivotally supporting the pivotally supporting sections 8a, 8b rotatably at both end sections. Leg bodies 20 rotatable between a folded state and a used state are mounted at the front and rear and left and right four corner sections of the stage section 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work scaffold for use at a relatively high place such as interior finishing of a ceiling, wiring in the ceiling, and piping work at a building construction site or the like.

[0002]

2. Description of the Related Art In the case of building a building, interior construction and wiring work are carried out after the skeleton is constructed. In that case, in finishing work in a relatively high place such as the ceiling,
Working scaffolds are used.

As the latest conventional device for this kind of work scaffold, there is one proposed in Japanese Patent Laid-Open No. 13662/1993.

It is provided with a stage section for performing work and a foldable leg body for the stage section, and when the pedestal is in use, the leg body is expanded to stand upright at the use position, and when not in use, it is folded to be in a stored state. According to this structure, the scaffolding member and the scaffolding plate are easy to use as compared with the case where they are separate bodies.

[0005]

However, in this conventional device, the legs can be folded and stored when not in use, but the stage portion cannot be folded, and the stage portion is improved in order to improve workability. If it is made wider, the legs are not sufficiently compact even if they are folded, and there is a problem in that two people need to transport the legs or a large storage space is required.

Therefore, it is conceivable to divide the stage part into two parts and connect them so as to be foldable by a hinge. In that case, it is necessary to secure sufficient strength and rigidity to withstand a load applied on the stage part. There is a problem that is difficult.

In view of the above-mentioned conventional problems, the present invention can fold the stage part in two when not in use and can fold the legs inside the stage part for compact storage / transportation. The purpose is to propose a work scaffold that can secure sufficient strength and rigidity.

[0008]

In order to achieve the above object, in the invention according to claim 1, the stage portion 1 on which the work is performed is indicated by the reference numeral in the drawing. It is divided into a pair of left and right stages 2a and 2b at the central position and is pivotally connected by a pivoting portion 3 between a developed state and a folded state. Of the connecting brackets 7a and 7b fixed to the front and rear side surfaces, and a pair of connecting brackets 7a and 7b on the front and rear side surfaces, which are formed so as to overlap each other in the front-rear direction at positions below the stages 2a and 2b at appropriate distances. The supporting portions 8a and 8b and the supporting portions 8a and 8b extend forward and backward along opposite ends of the stages 2a and 2b.
b is composed of a single long pivot shaft 9 for pivotally supporting the stage b, and the stage 2a is provided at four corners of the front, rear, left and right of the stage portion 1,
The leg 20 which is rotatable between the folded state along the lower surface of 2b and the use state hanging from the stage is adopted.

Further, in the invention according to claim 2, when the two stages 2a, 2b are developed in the same plane, the respective connecting brackets 7a for connecting the two stages 2a, 2b,
7b adopts the configuration according to claim 1, wherein the opposite end edges 7c are in contact with each other.

[0010]

According to the first aspect of the invention, the leg body 2 is provided so as to extend along the lower side of the stages 2a and 2b constituting the stage portion 1.
By folding the stages 2a and 2b at the pivoting portion 3 in a folded state of 0, the stage portion 1 can be stored and transported compactly even if the stage portion 1 is wide and the workability is improved. Since the attachment portion 3 is pivotally supported by the pivot portions 8a and 8b located at appropriate distances below the stages 2a and 2b, when a load is applied to the stage portion 1, the bending moment of the attachment portion 3 is the opposite ends of the stages 2a and 2b. Can be received by pushing each other and there is a distance between the force point and the fulcrum, so that sufficient strength and rigidity against bending moment can be easily secured. When a moment acts, the pivot 8
connecting brackets 7a, 7 having a, 8b formed in the lower part
Although b may bend outward and the connecting brackets 7a and 7b may be deformed or damaged, in the present invention, the pivotal support portions 8a and 8a are formed at both ends of one pivot shaft extending in the front-rear direction.
Since 8b is pivotally supported, this connecting bracket 7a, 7
It is possible to reliably prevent the deformation of b, and therefore, it is possible to secure sufficient strength and rigidity against a large bending moment even when the stage portion 1 is configured to be foldable. Further, by using the pivot shaft 9 as a handle during transportation, handling during transportation is easy.

According to the second aspect of the invention, when the two stages 2a and 2b are developed so as to be flush with each other, the two stages 2
Since the respective connecting brackets 7a and 7b connecting the a and 2b are arranged so that the opposite end edges 7c thereof are in contact with each other, even if a large load is applied to both the stages 2a and 2b, the connecting brackets 7a and 7b are connected to the connecting brackets 7a and 7b. Since they can be received by their mutual edges 7c, there is no possibility that they will be bent and become unusable at the opposite edges of both stages 2a, 2b.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the work scaffold of the present invention will be described below with reference to FIGS.

1 to 5, reference numeral 1 denotes a stage portion on which an operator rides and works on a ceiling or the like, and is divided into a pair of left and right stages 2a and 2b at a central position in the longitudinal direction. The stages 2a and 2b are in a developed state in which a flat stage portion 1 is configured by a pivot portion 3 disposed on their opposing edges and a folded state in which the lower surfaces of the stages 2a and 2b are folded so as to face each other. It is connected so that it can be opened and closed. As shown in FIG. 5, each of the stages 2a and 2b has a rectangular peripheral frame 4 and a step board 5 which are made by combining appropriate aluminum mold members so as to have a required bending strength and rigidity on which a person can ride and work. And the reinforcing ribs 6 are configured.

The pivoting portion 3 has connecting brackets 7a and 7b fixed to the front and rear side surfaces of the opposite ends of the stages 2a and 2b, respectively, and pivoting portions 8a and 8b are formed on the connecting brackets 7a and 7b. The lower end of the opposite edge of 7b is CC in FIG.
As shown in the cross-sectional portion, a plate body forming one pivotally supporting portion 8b is welded to the outside of the connecting bracket 7b and the other pivotally supporting portion 8b is welded.
It is formed so as to overlap with a in the front-rear direction, and both pivotally supporting portions 8a, 8b are rotatably connected by a single long pivot shaft 9 extending in the front-rear direction orthogonal to this. Therefore, when the stages 2a and 2b are brought into the unfolded state, the connecting brackets 7a and 7b are brought into contact with each other at their opposite end edges 7c and the stage 2
a and 2b are maintained in the same developed state and the stage 2
Connection brackets 7a, 7b even when a load is applied to a, 2b
The contact edges 7c of each other are received.
Further, a cap nut 10 is screwed and fixed to both ends of the pivot shaft 9, and is engaged with an outer surface of the outer pivot portion 8b via a washer 11. As a result, when a load acts on the stage unit 1, the bending moment causes the connecting bracket 7 to move.
The lower parts of a and 7b bend outward, and as a result, a force acts to peel off the connecting brackets 7a and 7b due to the load, or the position of the connecting brackets 7a and 7b shifts to the abutting portions of the opposite end edges. To prevent the occurrence of a large load on the stage 1 even when a large load is applied to the stage 2.
The stage portion 1 is prevented from inclining so that the opposite ends of a and 2b fall downward, and the pivotal support portion 3 is prevented from being damaged. Further, the locking lock 12a and the hook 12b to be locked are attached to the connecting brackets 7a and 7b, and when the stages 2a and 2b are expanded, the connecting bracket 7a and 7b are locked.
Connect a and 7b so that they do not spread,
a and 2b unexpectedly rotate in the folding direction to move the stage unit 1.
It is designed so that the central part of the is not lifted.

The front and rear and right and left four corners of the stage portion 1, more specifically, the front and rear end portions of the left and right outer end surfaces of the stages 2a and 2b, as leg mounting portions, have a substantially U-shaped cross section and have openings in the left and right opposing directions. A leg body mounting bracket 13 is fixedly attached, which extends downward and extends below the lower ends of the stages 2a and 2b. Further, the front and rear side surfaces of the stages 2a and 2b and the front and rear direction outer surface of each leg mounting bracket 13 are flush with each other, and the reinforcing strength of the leg mounting bracket 13 is fixed by the reinforcing plate 14 superposed on and fixed to these side surfaces. Is reinforced. In addition,
The distance between the upper ends of the stages 2a and 2b and the lower end of the leg attachment bracket 13 is set to be substantially equal to the distance between the upper ends of the stages 2a and 2b and the axis of the pivot shaft 9.

As shown in detail in FIG. 6, an inclined holding surface 16a is formed at an outer portion in the left-right direction inside the leg mounting bracket 13 so as to incline toward the inner side in the left-right direction as it moves upward. The wedge-shaped holding member 15 is fixed, and the inclined holding surfaces 1 of the left and right end surfaces of the stages 2a and 2b are fixed.
A vertical holding surface 16b is formed in a portion facing 6a. The guide surface 17 is formed by the side walls of the leg mounting bracket 13 that face each other in the front-rear direction, and the inclined holding surface 16a is formed.
A wedge-shaped space 19 is formed by the vertical holding surface 16b and the pair of guide surfaces 17. The guide surface 17 and the reinforcing plate 14 are formed with a vertical guide groove 18 extending from the vicinity of the upper end thereof to a position below the lower ends of the stages 2a and 2b.

Reference numeral 20 denotes a leg body attached to the leg attachment bracket 13, and a wedge-shaped fixing portion 21 which can be just fitted and engaged in the wedge-shaped space 19 of the leg attachment bracket 13 is fixed to the upper end portion thereof. The wedge-shaped fixing portion 21 has an inclined holding surface 16a.
And the wedge surface 22 and the guide surface 17 corresponding to the vertical holding surface 16b.
Corresponding to the guide surface 23 is formed, and at the upper end of the wedge-shaped fixing portion 21, the shaft hole 2 penetrating in the opposite direction of the guide surface 23 is formed.
4 are formed. Reference numeral 25 denotes a support shaft that rotatably supports the leg body 20, and penetrates the guide groove 18 of the leg body mounting bracket 13 and the shaft hole 24 of the wedge-shaped fixing portion 21. The support shaft 25 is composed of bolts, and the head portion 25a of the support shaft 25 is the reinforcing plate 1.
4 is engaged with the outer surface of the guide surface 17 through the washer 27, and the nut 26 screwed to the tip end of the support shaft 25
Is configured to move smoothly along the guide groove 18 without coming out. Thus, in the leg 20, the wedge-shaped fixing portion 21 is fitted into the wedge-shaped space 19 and fixed in the upright state, and the wedge-shaped fixing portion 21 is fixed in the wedge-shaped space 1.
It can be opened and closed between a folded state in which it is pulled out from 9 and folded so as to overlap the lower surfaces of the stages 2a and 2b. In the guide groove 18, the wedge-shaped fixing portion 21 is fitted into the wedge-shaped space 19 before the support shaft 25 reaches the upper end thereof, and the leg body 20 stands upright with the support shaft 25 engaged with the lower end thereof. It is formed so as to be rotatable between a posture and a folded posture.

The pair of front and rear legs 2 on the left and right sides
0 and 20 are connected to each other at a lower portion thereof by a horizontal rail 28. Further, a height adjusting leg 29 is inserted from the lower end of each leg 20 in a fitted state, and can be fixed at an arbitrary position by a fixing means 30. The fixing means 30 includes a fixing pin 31 and a fastening bolt 32,
The fixing pins 31 are engaged with engaging step portions (not shown) formed at appropriate intervals in the longitudinal direction on the height adjusting legs 29, and the height is arbitrarily set, and the height adjusting legs 29 are tightened with fastening bolts 32. It is configured to prevent rattling by pressing.

Further, as shown in FIGS. 7 and 8, the stages 2a and 2 are provided at substantially central positions on the left and right end surfaces of the stage portion 1, respectively.
The leg 20 is folded on the lower surface of b, and the stage 2a,
A locking lock 33a and a locked hook 33b for holding the 2b in the folded state at the pivot portion 3 are attached.

According to the work scaffold having the above structure, as shown in FIGS. 7 and 8, the legs 3 are folded on the lower surfaces of the stages 2a and 2b, and the stages 2a and 2b are further folded by the pivot portion 3. By using the leg mounting bracket 13 as a leg above the pivot 9, it can be compactly folded and stored, and the pivot 9 can be used as a handle for easy carrying.

When carrying this work scaffold to a desired position for use, as shown in FIG. 9 (a), the pivot 3 is set up and the locking lock 33a is released.
b around the pivot 9 as shown by the arrow,
As shown in (b), the stages 2a and 2b are in the unfolded state, and in that state, the locking lock 12a provided on the pivotally attached portion 3 is hooked on the hook 12b to be locked, and the stages 2a and 2b are accidentally folded. The stage unit 1 is formed so as not to rotate. Next, after the leg body 20 is rotated around the support shaft 25 to stand vertically as shown by the arrow in FIG. 9B, the wedge-shaped fixing portion 21 is attached as shown by the arrow in FIG. 9C. The leg body 20 is fixedly held in a vertical state by being fitted and engaged in the wedge-shaped space 19. After that, this can be used as a work scaffold by standing it so that the stage part 1 is on top.

When the working scaffold is in use, the bending moment generated by the load on the stage portion 1 is received by the force of the opposing ends of the connecting brackets 7a, 7b pressing each other, and between the force point and the pivot point. Since there is a distance, sufficient strength and rigidity with respect to bending moment can be easily secured, and since both ends of one pivot shaft extending in the front-rear direction pivotally support the pivot parts 8a and 8b, Deformation of the connecting brackets 7a, 7b can be reliably prevented, the connecting brackets 7a, 7b bend outward, and the connecting brackets 7a, 7b
There is no fear that b will be deformed or damaged,
Therefore, even if the stage portion 1 is configured to be foldable, sufficient strength and rigidity can be secured against a large bending moment.

Further, since the wedge-shaped fixing portion 21 is pressed into the wedge-shaped space 19 of the leg mounting bracket 13 according to the load of the stage portion 1, the wedge-shaped fixing portion 21 is pressed by the wedge effect. Is firmly and integrally connected to. Therefore, rattling of the legs 20 is completely prevented even when a load is applied to the stage 1 in the front-rear, left-right directions. Therefore, even when a load, vibration, or shock is applied from the outside, the legs 20 will not move. It is possible to provide a work scaffold which is fixed to 1 in a stable manner, can be folded in an extremely compact manner, and is extremely stable.

The height of the stage 1 can be easily adjusted by inserting and removing the height adjusting leg 29 from the leg body 20 and fixing the height adjusting leg 29 with the fixing means 30. There is no rattling with the adjusting leg 29.

As shown in FIG. 10, for example, this work scaffold can be suitably used when an operator rides on the stage 1 for interior work of the ceiling, wiring in the ceiling, and piping work. .

Next, when the work is completed and the work scaffold is folded into the accommodation state, the work scaffold is sequentially folded in the reverse order of the assembling procedure shown in FIGS. 9 (a) to 9 (c), and FIGS. In this state, it can be easily transported and stored.

In the above embodiment, the stages 2a and 2b are used.
In the expanded state, the edges of the connecting brackets 7a and 7b contact each other, and a gap is provided between the opposing edges of the stages 2a and 2b. However, the opposing edges of the stages 2a and 2b contact each other. However, it goes without saying that it is good.

In the above embodiment, the support shaft 25 is fixed to the wedge-shaped fixing portion 21, and the guide groove 18 formed in the guide surface 17 is formed.
Although the support shaft 25 is engaged with the guide surface 17, the guide shaft 18 may be formed on the wedge-shaped fixing portion 21 side. Further, of the sandwiching surfaces 16a, 16b facing each other in the opening / closing direction of the leg 20 of the wedge-shaped space 19, the outside is the inclined sandwiching surface 16a and the inside is the vertical sandwiching surface 16b, but the inside and the outside may be reversed. , Both clamping surfaces 16a, 16
Both b may be inclined sandwiching surfaces.

[0029]

According to the invention of claim 1, the legs are folded along the lower sides of the pair of left and right stages constituting the stage portion, and the stage is folded at the pivot portion. As a result, even if the stage is wide and workability is improved, it can be compactly stored and transported.
Moreover, since the pivot portion is pivotally supported by the pivot portion at an appropriate distance below the stage, the bending moment applied to the stage portion by the load is received by the force of pressing the opposite ends of the stage against each other and Since there is a distance between the force point and the pivot point, sufficient strength and rigidity with respect to bending moment can be easily ensured. Further, in such a pivotally-attached portion structure, since the pivotal support portion is pivotally supported at both ends of one pivotal support shaft extending in the front-rear direction, the pivotal support portion is formed when a large bending moment acts. There is no risk that the connecting bracket will bend outward and will not be deformed or damaged. Therefore, even if the stage part is configured to be foldable, sufficient strength and rigidity are secured against a large bending moment. can do.
Further, in the folded state, the pivot shaft is used as a handle during transportation, so that it is easy to handle during transportation, and great effects are exhibited.

Further, according to the second aspect of the invention, even if a large load is applied to the pair of stages bent at the central portion, the loads can be received by the abutting edges of the connecting brackets. It can be used stably for a long period of time without being bent at the opposite edges and becoming unusable.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a work scaffold of the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a side view of the embodiment.

FIG. 4 is a sectional view taken along the line AA of FIG.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is an exploded enlarged perspective view of a leg attaching portion of the embodiment.

FIG. 7 is a front view of the working scaffold of the embodiment in a folded state.

FIG. 8 is a vertical cross-sectional front view of the working scaffold of the embodiment in a folded state.

FIG. 9 is an explanatory diagram of a process of expanding the work scaffold of the embodiment into a used state.

FIG. 10 is a perspective view showing a usage state of the embodiment.

[Explanation of symbols]

 1 Stage part 2a Stage 2b Stage 3 Pivot part 7a Connection bracket 7b Connection bracket 8a Pivot part 8b Pivot part 9 Pivot shaft 20 Leg body

Claims (2)

[Claims] 1. A stage part for performing work is divided into a pair of left and right stages at a central position in the longitudinal direction thereof, and is pivotally connected by a pivotal part between a developed state and a folded state,
Pivot parts are connected brackets fixed to opposite ends of both stages, a pivot support part formed on both joint brackets so as to overlap with each other at a lower position of the stage, and opposite end parts of both stages. It is composed of a long pivot shaft that extends in the front-rear direction and that pivotally supports the pivot portion at both ends of the stage. A work scaffold characterized in that it is provided with a leg body that can be rotated between a hanging state and a use state. 2. The work scaffold according to claim 1, wherein when the two stages are unfolded in the same plane, the respective connecting brackets connecting the two stages come in contact with each other at their opposite end edges.