JPH07180344A - Folding scaffolding stand for building work - Google Patents

Abstract

PURPOSE:To reduce the height of a scaffold stand for a building work when it is folded up and to make thereby movement of the folded-up state easy, and to make works for folding up for putting in storage and for unfolding for putting in the state of use easy. CONSTITUTION:Supports are installed to four corners on the front, the rear, the right and the left, and side frames 9 heading toward the front side are hinged at their rear ends respectively to the two supports 1b on the rear side with vertical shafts 11 so that they can be turned at 90 degrees, and the supports 1a on the front side are connected to the front ends of the side frames 9. A scaffold stand frame 12 in a square shape on top of points near the upper parts of the four supports is hinged at its rear-side face with a horizontal shaft 14 to points near the upper parts of the supports 1b on the rear side, and holding pieces 17 are provided to the front end of the scaffold stand frame 12 for being held to the upper parts of the support on the front side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a foldable type that allows an operator to move up to a high position and easily move when working on a high portion of a ceiling or a wall of a construction site. Regarding construction work scaffolding.

[0002]

2. Description of the Related Art Conventionally, when performing work on a ceiling or a high portion of a wall in construction work, a pipe and a clamp are used along the wall to create a frame, and the frame holds a scaffolding board. , So that the worker can rest on it. It is also known that the scaffolding base is made foldable so that it can be easily carried and assembled. This folding scaffolding base is disclosed in Japanese Patent Application Laid-Open No. 2-85467 and Japanese Utility Model Publication No. 6
As described in Japanese Patent Publication No. 2-110439, wheels are provided at the lower ends of the columns so that they can be moved. Also, when cutting at the center of the scaffolding and connecting with hinges, when folding, The half of the scaffolding plate is lifted up at the center side end and both of them are erected vertically in the center part of the scaffolding base to be in a stored state.

[0003]

In the conventional folding type scaffolding platform, when folding the scaffolding platform cut in half, the scaffolding platform is lifted up to make it vertical, so that the height of the scaffolding platform in the stored state becomes high. Such as not being installed in a cargo elevator
It was inconvenient to carry. Further, since the scaffolding base becomes taller in a folded state, there is a problem that it is not easy for one operator to fold the scaffolding base vertically or to spread it horizontally. Therefore, an object of the present invention is to prevent the height of the scaffolding base in the folded state from becoming high, to facilitate the carrying, and to facilitate the work of expanding the storage state and the use state.

[0004]

SUMMARY OF THE INVENTION The present invention is a folding type construction work scaffolding that achieves the above object, in which at least four corners in the front, rear, left and right are provided with columns having wheels at their lower ends, and between the two columns on the rear side. Are connected by horizontal bars and side frames facing the rear side are attached to the two front columns, respectively, and the rear end of each side frame is axially connected to the rear columns by a vertical shaft via a bracket. Then, the rear end side surfaces of the rectangular scaffold underframe having the vertices near the upper portions of the four columns are rotatably connected to the upper portions of the rear columns via a horizontal axis,
A locking piece is provided at the front end of the scaffolding base frame so as to be detachably locked to the upper part of the front strut, and the left and right side frames are pivoted to the positions between the rear strut with their shaft couplings as fulcrums. The scaffolding underframe is characterized by being able to be rotated downwards about a horizontal axis as a central axis and lowered.

Each strut is formed of a double cylinder which can be expanded and contracted in the longitudinal direction, and a fixing means for fixing the strut to a predetermined length is provided. A handrail is detachably provided on the upper surface of the scaffold flooring. Furthermore, the folding type construction work scaffolding was constructed as follows. Two central columns having wheels at the lower end are arranged at intervals, and one end of the side frame is axially connected to both sides of the central columns on both sides by a vertical axis,
To the outer end of each side frame, connect a column with wheels at the lower end,
One end of the scaffolding floor frame is connected to both sides of each of the two central columns by a horizontal axis, and locking pieces for locking the columns at the outer ends of the side frames are provided at the outer ends of the scaffolding floor frames on both sides. Has been.

[0006]

When the folding construction work scaffolding base of the present invention is folded, the locking pieces of the scaffolding floor frame are removed from the state of being connected to the front columns and lifted a little, and then the side frames on both sides are centered around their shaft connecting portions. Then, the two columns on the rear side are rotated so as to be adjacent to and overlap with each other. When the side frame is rotated, the front pillar also moves together with the side frame toward the vicinity of the central portion between the two rear pillars. Furthermore, by rotating the scaffolding floor frame around the horizontal axis to which it is axially connected and lowering it down, it can be stored at the same height as the height when it is in use. It can be easily moved. Also, when expanding the stored folding scaffolding platform for use, rotate the scaffolding floor frame around the horizontal axis connecting it and lift it up, then rotate it to the rear side. To turn the scaffolding stand into use by rotating the side frame that was moved 90 degrees forward and locking the locking piece provided on the scaffolding floor frame to the upper part of the pillar that was rotated forward. You can

When changing the height of the scaffold, the length of each of the double-pillar columns is adjusted by removing the fixing means, and then the length of the columns is fixed by the fixing means. In addition, for the safety of work on the scaffolding table, handrails are attached around the upper surface of the scaffolding floor material, and are removed when folding. In the case where the side frame and the scaffolding flooring having the columns at the outer ends are provided on both sides of the central column,
Similarly, after rotating the side frames on both sides of the central column so as to overlap between the central columns, the scaffolding floor frames on both sides are pivoted about a horizontal axis to be in a stored state. In addition, when in use, similarly to the above, the scaffolding floor frames on both sides are raised close to horizontal, the side frame on both sides are rotated forward by 90 degrees, and are rotated above each scaffolding floor frame to make them horizontal. Lock the stop on the top of the post at the front position.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the folding construction work scaffolding base of the present invention will be described with reference to FIGS. The columns 1a and 1b are provided at the four vertex positions of the rectangle, respectively.
1b is formed in a double cylinder and is expandable and contractable, and a pin hole 2a is provided in the lower portion of the outer cylinder, and a pin hole 2b is provided in the inner cylinder at appropriate intervals in the longitudinal direction. Then, after adjusting the double cylinders forming the columns 1a and 1b to an arbitrary length, the pin hole 2b of the inner cylinder that matches the pin hole 2a of the outer cylinder.
The length can be fixed by a fixing means configured to pass the pin 3 through. Further, wheels 5 are attached to the lower ends of the columns 1a and 1b via a free shaft 4 so as to face in any direction, thereby facilitating the movement of the construction work scaffolding base.

A plurality of horizontal bars 6 are provided between the two rear columns 1b.
The horizontal support frame 7 is attached to the front side on the two rear columns 1b, and the horizontal support frame 7 and the rear column 1b are connected by a stay 8. The strength for holding the horizontal support frame 7 horizontally is increased. Further, the horizontal support frame 7 is provided with a punched metal, a wire net, etc. in an elongated rectangular frame so that an operator can be placed thereon. A side frame 9 directed toward the rear side is attached to each of the two front columns 1a, and two upper and lower portions of the rear end of each side frame 9 are attached to the rear column 1b by a vertical shaft 11 via a bracket 10. It is axially connected. Then, as shown in FIG. 3, the side frame 9 can be rotated 90 degrees around the shaft 11 toward the front and can be changed to a position overlapping between the two rear columns 1b. There is. Side frame 9
Has a plurality of horizontal bars 9a, which can function as a ladder for climbing onto the scaffolding base. Although not shown, a stopper is provided at the connecting portion of the shaft 11 of the side frame 9 so that the side frame 9 does not rotate outward by 90 degrees or more from the state in which the side frame 9 overlaps between the two rear columns. .

A scaffolding underframe 12 having a quadrangular shape (here, a size excluding the horizontal support frame 7) having the vertices near the upper portions of the four columns 1a, 1b is arranged on the upper side of the four columns, and the scaffolding underframe is formed. The side surface of the rear side 12 of 12 is rotatably connected to the horizontal support frame 7 via a bracket 13 by a horizontal shaft 14 so that it can be rotated from a horizontal use state to a vertical storage state. The scaffolding underframe 12 is supported by the horizontal support frame 6 via the shaft 14 on the rear side and is supported on the front two columns 1a on the front side. In this embodiment, the scaffolding underframe 12 has a lattice-shaped frame on which a punch metal, a wire mesh, or the like is attached, and an operator can be placed on it. However, the scaffolding frame 12 is composed of only the surrounding frame,
Stretch a plurality of rectangular scaffolding boards between the surrounding frames,
You may make it comprise a scaffold floor by those scaffold boards. In that case, hooks to be locked to the frame are provided at both ends of the scaffolding plate, and the hooks can be hooked to be fixed to the frame.

A locking hole 15 for pointing a handrail is provided in the peripheral portion of the scaffolding underframe 12, and the scaffolding underframe 12 is in use.
The lower end of the handrail 16 is inserted into the locking hole 15 on the upper surface of the scaffold to prevent the scaffolding frame from falling. When folding the scaffolding, the handrail 16 is pulled out from the locking hole 15 and removed. Further, locking pieces 17 are provided on both sides of the front end of the scaffolding frame 12, and engagement holes 18 into which the locking pieces 17 are inserted are provided at the upper ends of the two front columns 1a. Then, when the scaffolding base is in use, the locking piece 17 is inserted into the engagement hole 18, and when the scaffolding base frame 12 is folded into the stored state, the locking piece 17 is pulled out from the engagement hole 18. After the side frame 9 is rotated 90 degrees and overlapped between the two rear columns, the scaffold underframe 12 is rotated around the horizontal shaft 14 and lowered downward as shown in FIG. Be done. Although the scaffolding underframe 12 has the size of the portion excluding the horizontal supporting frame 7 in the above-described embodiment, the scaffolding underframe 12 is constituted by only the U-shaped frame, and the scaffolding underframe 12 has the horizontal supporting frame 7. You may comprise in the shape which has a part which covers a U-shaped recessed part. However, in that case, when the scaffolding underframe 12 is rotated to the stored vertical state,
The base side projects slightly upward.

Next, the folding type construction work scaffolding base of the second embodiment will be explained with reference to FIG. In this embodiment, two scaffolding bases of the first embodiment are connected to each other, and a total of four columns in the central portion are used as a central column. Two center columns 23 having a structure in which two columns 21 are connected to each other and wheels 22 are attached to the lower portions thereof are arranged at intervals, and side frames 24 are respectively provided on both sides of the center columns 23 on both sides in the vertical direction. The shaft is connected at 11. Each side frame 24 has the same configuration as that of the first embodiment,
As shown in the figure, it is possible to rotate 90 degrees from the direction perpendicular to the line connecting the two central columns 23 to a position overlapping between the two central columns. Further, a pillar 25 having a wheel 22 at its lower end is connected to the outer end of each side frame 24.

Horizontal support frames 6 are attached to both upper sides of the two central columns 23, and one end of a scaffolding underframe 12 is axially connected to each of the horizontal supporting frames 6 by a horizontal axis 14 so that each scaffolding underframe 12 can be connected. Can be rotated around the shaft 14 to change between a horizontal state and a vertical state. Further, similarly to the first embodiment, the support 2 at the outer end of the side frame 24 is provided at the outer end of each scaffolding underframe 12.
5 is provided with a locking piece 17 for locking the locking piece 17.
Is engaged with the engaging hole 18 in the upper portion of the column 25. Then, after rotating each side frame 24 so as to overlap between the two central columns 23, the scaffolding underframes 12 on both sides are rotated around the horizontal axis 14 to remove the outer ends of the scaffolding underframe 12. It can be lowered and stored. The scaffolding base frame 12 may be a scaffolding floor provided by surrounding the surrounding frame with a plurality of scaffolding plates as in the first embodiment, or by providing a wire mesh or punch metal in the surrounding frame. Further, the scaffolding underframe 12 is similar to the first embodiment in that the horizontal support frame 7
May be a U-shaped frame only, and the scaffolding underframe 12 may be configured to have a surface that covers the U-shaped recess.

[0014]

According to the scaffolding base for construction work of the present invention, the side frames are stacked adjacent to each other between the two rear columns without changing the height when folded, and the scaffolding frame is formed by connecting them. Since the tip portion is lowered downward about the horizontal axis, the height of the housed state can be lowered and the movement becomes easy. When the scaffolding underframe is folded and folded into the use state as described above, the scaffolding underframe is rotated around its connecting shaft to be in a horizontal state, and then the side frame is stretched to be provided on the scaffolding underframe. The locking piece is simply inserted into the engagement hole in the upper part of the front strut, and the work of folding and overhanging is easy. In addition, since the scaffolding base can adjust the length of the support columns, it is possible to support different work heights, and a handrail can be attached on the scaffolding base for safe work. Further, when the scaffolding floor frame and the side frame are provided on both sides of the center column, the scaffolding platform having a large area floor can be formed to be foldable.

[Brief description of drawings]

FIG. 1 is a front view (a) and a side view (b) of a construction work scaffolding base according to a first embodiment of the present invention.

FIG. 2 is a plan view of the construction work scaffolding base of the first embodiment of the present invention.

FIG. 3 is an explanatory view of rotating a side frame of the construction work scaffolding base of the present invention to bring it into a stored state.

FIG. 4 is a side view showing a folded state of the construction work scaffolding of the present invention.

FIG. 5 is a side view of the construction work scaffolding base in the folded state according to the second embodiment of the present invention.

[Explanation of symbols]

 1a support 1b support 7 horizontal support frame 9 side support 12 scaffolding support 16 handrail 23 center support

Claims (4)

[Claims] 1. At least four corners on the front, rear, left, and right sides are provided with columns having wheels at their lower ends, and the two columns on the rear side are connected by a horizontal bar, and the two columns on the front side are each directed toward the rear side. A frame is attached, and the rear end of each side frame is axially connected to the rear pillar by a vertical shaft via a bracket, and the rear ends of the rectangular scaffolding underframes with the tops of the four pillars as apexes The side surface of the part is rotatably connected to the vicinity of the upper part of the rear pillar via a horizontal axis, and a locking piece for removably locking the upper part of the front pillar is provided at the front end of the scaffolding underframe. The left and right side frames of the scaffold can be pivoted to the positions between the rear columns by using the shaft connecting portion as a fulcrum, and the scaffold underframe can be swung downward with the horizontal axis as the central axis. Foldable construction work scaffolding stand. 2. The foldable construction work scaffolding base according to claim 1, wherein each of the columns is formed of a double cylinder that can be expanded and contracted in the longitudinal direction, and fixing means for fixing the columns to a predetermined length is provided. 3. The foldable construction work scaffolding base according to claim 1, wherein a handrail is detachably provided on an upper surface of the scaffolding floor frame. 4. Two center columns having wheels at the lower end are arranged at intervals, and on both sides of the center columns on both sides, respectively.
One end of the side frame is axially connected by a vertical axis, the outer end of each side frame is connected to a column having wheels at the lower end, and one end of the scaffolding floor frame is horizontally attached to both upper sides of the two central columns. Scaffolds on both sides are provided at the outer ends of the scaffolding floor frames on both sides. A foldable construction work scaffolding platform characterized in that the floor frame can be rotated around a horizontal axis to lower the outer end of the floor frame downward.