JPH1181657A - Opening and closing ledger frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve elevating function by pivoting a floor plate on a ledger frame in such a manner as to be opened and closed to form a staircase opening part. SOLUTION: This opening and closing ledger frame 1 is so constructed that a ledger frame body 6 is formed by first frames 2, 3 and second frames 4, 5, the end corner of a floor plate 8 is pivoted on the frames 4, 5 by bolts 28 to open and close the floor 8 in the frame 6, and at the time of closing the floor 8, the floor 8 is engaged with the frames 2, 3. In constructing the frame scaffold, a staircase is stretched between the horizontal muntin of upper and lower vertical frame, and a ledger frame 1 is erected between the horizontal muntin between the vertical frames above the staircase. At the time of going up and down the staircase, grips 34 are grasped to open the floor 8 upward to the side of the frame 6, and the frame 6 is opened. At this time, the frame 6 is prevented from being fallen down due to the wind or the like by frictional elasticity of an elastic member provided on a pivotal part, and an expand metal 18 is laid on the floor 8, whereby at the time of opening the floor 8, the existence or absence of a worker can be confirmed. Thus, in a narrow frame scaffold, the worker can freely pass through the staircase opening part without vertical frames for a staircase on the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an openable / closable cloth frame used for ascending and descending stairs in a framework scaffold for building construction.

[0002]

2. Description of the Related Art In general, a framed scaffold for building work is constructed by connecting opposed building frames with braces so as to be continuous in the horizontal direction and successively extending upwards, and extending a scaffolding fabric frame between the building frames. It is built.

Conventionally, a method of installing stairs between upper and lower scaffolding fabric frames of a framed scaffold has been proposed in which a high-order scaffolding fabric frame is set to one side to secure a stairway opening, and a stairway opening is secured to a building frame at this opening. The upper end of the stairs is gripped and fixed via metal fittings, whereby the stairs are installed in an inclined manner between the upper and lower scaffolding cloth frames, and further, in order to prevent a fall from the stair opening, the opening handrail frame is connected to the stair opening. It is installed around.

[0004]

By the way, if the building frame for constructing the frame scaffold is wide enough to arrange two or more scaffolding cloth frames side by side, the stairs can be installed as described above. If the building frame is narrow enough to allow only one scaffolding fabric frame, the stairs must be installed with the upper scaffolding fabric frame omitted, and as a result, it will pass through the stair opening. There is a problem that a layer that cannot be formed occurs and workability is poor.

[0005] As a means for solving such a problem, a method of providing a building frame for ascending and descending stairs is provided further outside the framework scaffolding. It is sufficient if there is sufficient space, but if space is limited, it was difficult to set the stairs installation location and installation method at the construction planning stage.

Accordingly, an object of the present invention is to provide a scaffold cloth frame installed on a framed scaffold which can be freely opened and closed without providing a building frame for ascending and descending stairs further outside the framed scaffold, so that the layer cannot pass through the stair opening. It is an object of the present invention to provide an openable / closable cloth frame which can eliminate the occurrence of cracks, is excellent in strength, and is excellent in safety during opening and closing operations.

[0007]

According to a first aspect of the present invention, a cloth frame is formed by a first frame and a second frame, and the cloth frame is attached to the cloth frame. A floor panel large enough to fit in the body is provided so as to be openable and closable by pivoting to the second frame, and when the floor panel is closed, the first frame and the floor panel are engaged in the width direction of the cloth frame. The configuration is adopted.

[0008] A second aspect of the present invention, in the first aspect of the invention, employs a configuration in which the floorboard is formed by extending an expand metal between two parallel cloth boards.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a shaft elastically connected to the floor plate and the second frame is provided with frictional elasticity for the rotation of the floor plate to maintain the open state of the floor plate. This adopts a configuration in which members are provided.

[0010] A fourth aspect of the present invention is the invention according to the first to third aspects, wherein a plurality of handles for opening and closing operations are provided on the upper surface of the floor panel.

[0011] Here, in a closed state in which the floor plate is accommodated in the cloth frame, the floor plate is engaged with the first frame in the width direction of the cloth frame,
The deformation of the cloth frame in the width direction can be prevented, and the expanded metal can be stretched so that the upper and lower parts can be seen through, so that safety can be confirmed when the floorboard is opened.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in the figure, an openable / closable cloth frame 1 is formed by connecting a pair of second frames 4 and 5 like a pair of first frames 2 and 3 in a frame shape to form a cloth frame 6. Hook plates 7 are provided at both ends of the second frames 4 and 5 in the frame body 6 respectively.
Is fixed in a protruding shape, and the floor plate 8 is large enough to fit in the cloth frame 6.
Are attached to the second frames 4, 5 so as to be openable and closable, and when the floorboard is closed, the first frame 2,
3 and the floor plate 8 are engaged with each other in the width direction of the cloth frame 6.

As shown in FIG. 3, each of the first frames 2 and 3 has a U-shaped cross section formed by a vertical plate 9, an upper plate 10 and a lower plate 11, and is bent toward the ends of the upper plate 10 and the lower plate 11. It is formed using a mold material such as aluminum provided with the pieces 12 and 13, and is arranged in parallel on both sides such that the opening surfaces having a U-shaped cross section face each other.

The second frames 4 and 5 are formed using a mold material such as aluminum having a U-shaped cross section, and are arranged in parallel so that the opening side of the U-shaped cross section faces outward. The cloth frames 6 are formed by fixing the first and second frames 4 and 5 and the first frames 2 and 3 by welding or the like.

The floor plate 8 is formed by arranging two cloth plates 14 and 15 having a length that can be accommodated between the second frames 4 and 5, with both ends of the cloth plates 14 and 15 having a U-shaped cross section. 16,
An expanded metal 18 that allows the see-through from above and below is stretched between two cloth plates 14 and 15 connected in parallel at 17.

As shown in FIGS. 2 and 3, the cloth plates 14 and 15 are formed by providing side plate portions 20 and 21 on both side edges on the lower surface of the top plate 19 and reinforcing ribs 22 at an intermediate portion of the lower surface. , One side plate portion 20 has a concave groove 23 in the upper portion, and the other side plate portion 21 has a cross section having a concave groove 24 in the lower corner portion,
The upper and lower cloth plates 14 and 15 are bilaterally symmetrical so that one side plate portion 20 is opposed to each other at a predetermined interval.
7, and has a planar size that fits just inside the cloth frame 6.

The expanded metal 18 is composed of the cloth plates 14 and 1
5, an expanded metal receiver 25 is fixed between the cloth plates 14 and 15 at appropriate intervals.

The floor plate 8 is accommodated in the cloth frame 6 while the end corners of the cloth plate 14 are connected to the second frames 4 and 5.
The floor plate 8 is openable and closable with the pivoted portion as a fulcrum.
A receiving plate 26 for reinforcing the cloth frame 6 and supporting the floor plate 8 accommodated in the cloth frame 6 is fixed.

FIGS. 4 and 5 show the structure of the pivotal portion of the floor plate 8 with respect to the second frames 4 and 5, which are symmetrical. Therefore, FIG. 4 shows only one of them. Here, the arm plate 27 is fixed to the end of the top plate cover 17, the tip of the arm plate 27 is pivotally fixed to a bolt 28 serving as a pivot penetrating the second frame 5, and an elastic member such as urethane rubber is fixed to the bolt 28. With the nut 29 fastened and the nut 31 fastened to the bolt 28 with the washer 30 interposed at each facing portion, the elastic member 29 is compressed, and the elasticity of the elastic member 29 causes the rotation of the floor plate 8 to be frictionally elastic. And the open state of the floor plate 8 is maintained.

When the floor plate 8 is closed, the first frames 2 and 3 and the floor plate 8 are engaged with each other in the width direction of the cloth frame 6 to prevent the cloth frame 6 from spreading in both width directions. At the upper edge of the center of the outer edge of the cloth plate 14 on the pivot side,
An opening prevention claw 32 whose tip toe is bent upward is fixed, and an opening prevention claw 33 whose tip toe is bent upward is fixed at a lower center position on the inner edge of the first frame 3. .

As shown in FIG. 3 (B), when the floor plate 8 is closed, the former opening prevention claw 32 is
Engages with the bent piece 12 of the upper plate 10 of the first frame 2, and the latter opening prevention claw 33, when the floor plate 8 is closed as shown in FIG. Are engaged with the concave grooves 24 of the other cloth plate 15.

On the floor panel 8, an opening / closing handle 34 is provided at a position near both ends on the upper surface of the other cloth panel 15 so as to be movable up and down. An opening / closing lock 35 that is detachable with respect to is mounted.

As shown in FIG. 3A, the opening / closing lock 35 is formed by bending a metal round shaft into a U-shape, and the vertical portion 36 penetrates the cloth plate 15 so as to be movable up and down. A portion located on the cloth plate 15 is an operation piece 37, and a lower portion is an engagement piece 38 for the opening prevention claw 33. By rotating the open / close lock 35 with the operation piece 37, the engagement piece 38 is opened. Disengage from In order to rotate the opening / closing lock 35 from the lower surface of the opening / closing cloth frame 1, the engagement piece 38 may be directly operated. A spring 40 for pushing down is vertically fitted to the vertical portion 36 between the lower surface of the cloth plate 15 and the washer 39 fixed to the lower portion, thereby preventing the lock 35 from projecting upward.

The openable fabric frame of the present invention is configured as described above. FIG. 6 shows a state in which the openable fabric frame is used as a framed scaffold. 52, and are sequentially arranged in the horizontal direction. Each building frame 51 is extended upward, and a floor-mounted cloth frame 53 is erected between the horizontal rails of the opposing building frames 51. Stairs 5
4 is laid in an inclined manner, and the openable / closable cloth frame 1 is erected between the horizontal rails of the building frame 51 at the upper portion of the stairs 54.

When it is not necessary to move up and down the stairs 54, the floor plate 8 may be closed. At this time, as shown by the solid line in FIG. If it does not open, it can safely pass over the openable / closable fabric frame 1.

When the stairs 54 need to be moved up and down, the locking of the opening / closing lock 35 is released and the handle 34 is grasped to hold the floor plate 8.
As shown in the dashed line in FIG. 2 and FIG. 6,
The floor plate 8 may be in a state of being flipped up to the upper side of the cloth frame 6, the cloth frame 6 is opened, and the stairs 54 can be moved up and down without any trouble. At this time, the raised state of the floor plate 8 is maintained by the frictional elasticity of the elastic member 29 provided at the pivot portion, and the floor plate 8 does not fall down due to wind or the like.

Since the handles 34 are provided at two positions near both ends of the openable cloth frame 1, the handle 34 can be operated from either of the cloth frames adjacent to the openable cloth frame 1.

When the floor plate 8 is opened, the expanded metal 18 is stretched on the floor plate 8, so that it is possible to see up and down at this portion, and there is a danger that a worker is on the floor plate 8 and the floor plate 8 is opened. Can be effectively prevented from occurring.

As described above, the openable / closable cloth frame 1 in which the floor plate 8 can be freely opened and closed with respect to the cloth frame body 6 can be used even on a narrow framed scaffold on which a single cloth frame 53 with a floor is installed. The stairs can be moved up and down without any trouble without providing a frame for the stairs.

[0031]

As described above, according to the present invention, the cloth frame is provided with a floor plate large enough to fit in the cloth frame so as to be opened and closed by pivotally attaching the cloth frame to the second frame. Even on narrow framed scaffolds, stairs can be raised and lowered without hindrance without providing a staircase building frame outside, and the generation of a layer that cannot pass through at the stair opening can be eliminated, and the floorboard is closed. In this state, the first frame and the floor plate are engaged with each other in the width direction of the cloth frame body, so that the cloth frame body can be prevented from spreading in the width direction with the floor board closed, and the load-bearing strength is reduced. In addition, it is possible to prevent the first frame from being bent when carrying the first frame portion of the openable / closable cloth frame.

Further, since the floor panel is formed by extending the expanded metal between the two cloth boards arranged in parallel, the upper and lower parts can be seen through the expanded metal section, greatly improving the safety when opening and closing the floor panel. In addition, the shaft for pivotally connecting the floorboard to the second frame is provided with an elastic member for imparting frictional elasticity to the rotation of the floorboard and maintaining the open state of the floorboard. There is no danger of being dropped and falling.

[Brief description of the drawings]

1 (A) is a plan view of an openable / closable cloth frame, FIG. 1 (B) is a front view thereof, and FIG. 1 (C) is a side view thereof.

FIG. 2 is an enlarged cross-sectional view of the openable cloth frame.

FIG. 3A is an enlarged sectional view of an opening / closing lock portion of the openable / closable cloth frame, and FIG.

FIG. 4A is an enlarged plan view showing a pivotable portion of a floor panel of an openable / closable cloth frame, and FIG.

FIG. 5 is an exploded perspective view showing a floor plate pivoting portion of the openable / closable cloth frame.

FIG. 6 is a perspective view of a framework scaffold using an openable cloth frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Openable cloth frame 2, 3 1st frame 4, 5 2nd frame 6 Cloth frame 7 Hook plate 8 Floor board 14 Cloth board 15 Cloth board 18 Expand metal 27 Arm plate 28 Bolt 29 Elastic member 32 Opening prevention claw 33 Open Prevention claw 34 Handle 35 Open / close lock

Claims (4)

[Claims] 1. A fabric frame is formed by a first frame and a second frame, and a floor plate large enough to be accommodated in the fabric frame is provided on the fabric frame so as to be openable and closable by pivotal attachment to the second frame. An openable / closable cloth frame wherein the first frame and the floor plate are engaged in the width direction of the cloth frame when the floor plate is closed. 2. The openable / closable fabric frame according to claim 1, wherein the floorboard is formed by extending an expand metal between two parallel fabric boards. 3. The openable / closable type according to claim 1, wherein a shaft pivotally connected to the floor plate and the second frame is provided with an elastic member that imparts frictional elasticity to the rotation of the floor plate and maintains an open state of the floor plate. Cloth frame. 4. The openable / closable fabric frame according to claim 1, wherein a plurality of handles for opening and closing operations are provided on the upper surface of the floorboard.