JPH027136Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a work scaffold having a retractable link type safety fence used at construction sites and the like.

Conventionally, elevating work scaffolds with retractable link safety fences used at construction sites, etc. have been constructed by fixing a lower rail to the side of a scaffold frame that supports scaffolding boards, and placing it above the lower rail. An upper rail is fixed to the upper part of a column whose lower part is fixed to the scaffold frame, and a number of movable columns that move guided by the lower and upper rails are connected via telescopic link fences. Are known.

However, in the case of a work scaffold with this structure, even when the movable columns are moved and the safety fence is opened, the upper rails exist above the sides of the scaffolding boards, so relatively long materials cannot be held vertically or vertically. When carrying materials onto a scaffolding board in an oblique direction, the materials hit the upper rails, making it difficult to carry them in and there is a risk of accidental falls.

[Purpose of the invention, structure]

The purpose of this invention is to provide a work scaffold having a retractable link type safety fence that can advantageously solve the above-mentioned problems. Guide rails 3 extending in the longitudinal direction of the scaffolding frame are fixed to both sides of the frame 2 in the width direction, and a large number of movable holding members 5 to which the lower portions of movable columns 4 are fixed are arranged side by side in the longitudinal direction of the guide rails, and the movable A plurality of upper guide rollers 6 that engage with the upper part of the guide rail 3 and a lower guide rail 7 that engages with the lower part of the guide rail 3 are attached to the holding member 5, and movable columns adjacent to each other in the longitudinal direction of the scaffold frame are attached. 4
This is a work scaffold having a telescoping link type safety fence which is connected via a telescoping link fence 8.

〔Example〕

Next, this invention will be explained in detail using illustrated examples.

Figures 1 to 14 show an embodiment of this invention, in which two sets of lifting columns 9 installed at intervals are provided with a lifting drive device (not shown). The lifting frame 10 is installed,
A scaffolding beam 11 having a three-dimensional truss structure is constructed across the lifting frame 10.

An outer tube 12 and an inner tube 1 slidably inserted into the outer tube 12
Support metal fittings 15 are fixed to both ends of a horizontal telescoping support rod 14 consisting of 3, and a large number of telescoping support rods 14 are arranged on the beam 11 so as to extend in a direction perpendicular to the longitudinal direction of the beam. At the same time, the outer pipe 12 is arranged so as to be located on the building side, and each telescoping support rod 14 is arranged at intervals in the beam longitudinal direction on the upper surface of the beam 11 and fixed by welding or other means. , and the outer tube 1 with the telescoping support rod 14 extended.
2 and the inner tube 13 are connected by bolts 16, the beam 11 and each telescoping support rod 14 constitute a scaffolding frame 2, and a scaffolding board 1 is constructed and fixed over the top of each telescoping support rod 14. Ru.

Guide rails 3 extending in the longitudinal direction of the frame are arranged on both sides of the scaffold frame 2 in the width direction, and the guide rails 3 include an upper rail 17 of a rhombic cross section, a lower rail 18 of a rhombic cross section, and a large number of connections connecting them. A large number of mounting fittings fixed to the side of the guide rail 3 by welding are connected to the support fittings 15 by bolts 20.
Fixed by

The lower ends of the fixed columns 21 and 22 arranged at one end and the other end of the guide rail 3 are fixed to the ends of the guide rail 3 by welding, and a large number of movable holding members fix the lower part of the movable column 4. 5 are arranged side by side in the longitudinal direction of the guide rail between the fixed columns 21 and 22, and the movable holding members 5
, a plurality of V-grooved upper guide rollers 6 that engage with the upper part of the upper rail 17 of the guide rail 3, and a V-grooved lower guide roller 7 that engages with the lower part of the lower rail 18 of the guide rail 3. installed.

One end of the rod 24 is fitted to one end of the downward opening groove-shaped connecting fitting 23 and fixed by welding, and one end of the rod 25 is fitted to the other end of the connecting fitting 23, so that the bolt can be removed. The upward bending type handrail rod 2 can be bent only into an inverted V shape from an almost horizontal state by being pivotally mounted by a horizontal shaft 26.
7 is constructed, and the upward bending type handrail rod 27 is arranged between the upper parts of adjacent movable pillars 4 and between the upper part of one fixed pillar 21 and the upper part of the movable pillar 4 adjacent thereto, and Both ends of the upwardly bent handrail rod 27 are pivotally connected to a bracket 28 fixed to the middle part of the column by a horizontal shaft 29 made of a bolt, and the pivot 26 of the bent joint is connected to the pivot 29 of the attachment part to the column. is also displaced upward by a distance E.

A large number of links 30 are arranged in a continuous X-shape and are pivotally connected to each other by pins to form a telescopic link fence 8.
The telescopic link fence 8 is arranged at the bottom of each handrail rod 27, and the upper end of the link at the end of the telescopic link fence 8 is pivotally connected by a pin 32 to a bracket 31 fixed to the column. Further, a pin 35 is inserted between the lower end of the link at the end of the telescopic link fence 8 and a vertically elongated hole 34 of a bracket 33 fixed to the column.

9 to 14 show a closing lock device, in which a handle 37 is attached to a bracket 36 fixed to the other fixed column 22 with a bolt.
A hook-shaped locking fitting 38 to which the locking fitting 38 or the handle 37 is fixed is pivotally attached by a horizontal shaft 39.
A spring 40 is engaged with the locking member 38 to rotate the locking member 38 in the locking direction.
An engaging metal fitting 41 having an engaging portion is fixed to the movable column 4 adjacent to the fixed column 22, and a limit switch LS is fixed to the fixed column 22, and the tip of the switch lever 42 of the limit switch LS is made of a disc. An operated member 43 is rotatably attached.

9 and 10 show a state in which the locking device is opened, and as the movable column 4 moves in the opening direction from this state, the engaging metal fitting 41 engages with the locking metal fitting 38. While being engaged and held in a closed state, the operated member 43 is held by the engaging metal fitting 41.
The limit switch LS is operated and turned on via the limit switch, and the signal from the limit switch controls the power supply circuit of the lifting drive device to enable lifting/lowering.

Further, by rotating the locking fitting 38 by the handle 37 against the force of the spring 40, the locking device can be released and the safety fence can be opened.

After releasing the locking device, when the movable column 4 at the end opposite to the fixed column 22 is pressed and moved toward the adjacent movable column, the pivot 26 of the bending connection part will be raised above the pivot 29 of the mounting part. As shown in FIG. 2, the upwardly bent handrail rod 27 at the end is automatically folded and the telescopic link rail 8 at the end is retracted. Thereafter, in the same manner, the remaining upward bending handrail rods 27 can be folded and the telescopic link fence 8 can be contracted in sequence.

Furthermore, by moving one of the adjacent movable columns in a direction away from the other movable column, the telescopic link fence 8 is extended, and the upward bending type handrail rod 27 is automatically extended to extend the telescopic link fence 8.
can be placed above.

Furthermore, the pivot 26 of the bent portion of the upwardly bent handrail rod 27 may be arranged at the same level as the pivot 29 of the mounting portion. In this case, when retracting the telescopic link fence 8, if a pushing force is applied to the middle part of the upward bending type handrail rod 27 when the movable column 4 starts moving, the upward bending type handrail rod 27 will bend slightly. After that, by simply moving 4, the upwardly bent handrail rod 27 can be folded.

Furthermore, by moving one of the adjacent movable columns in a direction away from the other movable column, the telescopic link fence 8 is extended, and the upward bending type handrail rod 27 is automatically extended to extend the telescopic link fence 8.
can be placed above.

Furthermore, the pivot 26 of the bent portion of the upwardly bent handrail rod 27 may be arranged at the same level as the pivot 29 of the mounting portion. In this case, when retracting the telescopic link fence 8, if a pushing force is applied to the middle part of the upward bending type handrail rod 27 when the movable column 4 starts moving, the upward bending type handrail rod 27 will bend slightly. Thereafter, by simply moving the movable column 4, the upward bendable handrail rod 27 can be folded.

As in the above embodiment, if the pivot axis 26 of the bending part is deviated upwards from the pivot axis 29 of the mounting part, the upward bending type handrail rod 2
The handrail rod can be folded from its straight state simply by moving the movable support without applying any upward force to the middle part of the handrail.

15 to 20 show modified examples of the relationship between the guide rail and the guide roller of the movable holding member, and in the case of the first modified example shown in FIGS. 15 and 16, the upper and lower parts are A hexagonal guide rail 3 having a V-shaped portion is used, and a plurality of upper guide rollers 6 and a plurality of lower guide rollers 7 are respectively attached to the movable holding member 5.

In the case of the second modification shown in FIGS. 17 and 18, a guide rail 3 with a rectangular cross section that is elongated in the vertical direction is used, and the movable holding member 5 includes a plurality of grooved upper guide rollers 6. and a grooved lower guide roller 7 are attached.

In the case of the third modification shown in FIGS. 19 and 20, a guide rail 3 with a square cross section is used,
Moreover, a plurality of grooved upper guide rollers 6 and a plurality of flanged lower guide rollers 7 arranged at intervals in the rail longitudinal direction on both sides in the rail width direction are attached to the movable holding member 5.

[Effect of idea]

According to this invention, guide rails 3 extending in the longitudinal direction of the scaffold frame are fixed to both sides in the width direction of the scaffold frame 2 that supports the scaffold board 1, and a large number of movable holding members 5 to which the lower portions of the movable columns 4 are fixed. are arranged side by side in the longitudinal direction of the guide rail, and the movable holding member 5 includes a plurality of upper guide rollers 6 that engage with the upper part of the guide rail 3, and a lower guide rail 7 that engages with the lower part of the guide rail 3. is attached, and the movable columns 4 adjacent to each other in the longitudinal direction of the scaffold frame are connected via the telescopic link fence 8. Therefore, when the safety fence is moved along the guide rail 3 and opened, the sides of the scaffold board There is no upper rail that would be an obstacle when carrying in materials, and as a result, it is possible to carry in materials easily and safely.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a schematic front view showing an example of the telescoping link type safety fence with handrail installed on an elevating scaffold, and Fig. 2 is a part of it. 3 is an enlarged cross-sectional view taken along the line A-A in FIG. 2, FIG. 4 is a partial plan view, and FIG. 5 is an upward-bending handrail rod and its connection to the post. A partially cutaway front view showing the
Fig. 6 is a partially cutaway plan view, Fig. 7 is a partially cutaway front view showing the handrail rod bent and folded into an inverted V shape, and Fig. 8 is a partially cutaway front view of the handrail rod bent into an inverted V shape. 9 is a front view showing the closing lock device in a separated state, FIG. 10 is a partially cross-sectional plan view thereof, and FIG.
FIG. 12 is a cross-sectional view taken along the line A-A in FIG. 11, FIG. 13 is a front view showing the state in which the closing lock device is locked, and FIG. 14 is a portion thereof. 15 to 20 show modified examples of the relationship between the guide rail and the guide roller of the movable holding member, and FIG. 15 is a longitudinal sectional front view showing the first modified example, and FIG. 16 is its side view,
Fig. 17 is a longitudinal sectional front view showing the second modification;
The figure is a side view thereof, FIG. 19 is a longitudinal sectional front view showing a third modification, and FIG. 20 is a side view thereof. In the figure, 1 is a scaffold board, 2 is a scaffold frame,
3 is a guide rail, 4 is a movable column, 5 is a movable holding member, 6 is an upper guide roller, 7 is a lower guide roller, 8 is a telescopic link fence, 9 is a column for lifting and lowering, 10
is a lifting frame, 11 is a scaffolding beam, 14 is a telescopic support rod, 15 is a support metal fitting, 17 is an upper rail, 18 is a lower rail, 19 is a connecting member, 21 and 22 are fixed columns, 23 is a connecting metal fitting, 24 is a rod, 25 is a rod, 26 is a horizontal axis, 27 is a bent handrail rod, 37 is a handle, 38 is a locking metal fitting, 40 is a spring, and 41 is an engaging metal fitting.

Claims (1)

[Scope of utility model registration request] Guide rails 3 extending in the longitudinal direction of the scaffold frame are fixed to both sides in the width direction of the scaffold frame 2 that supports the scaffold board 1, and a large number of movable holding members 5 fixed to the lower portions of the movable columns 4 extend in the longitudinal direction of the guide rails. are arranged side by side, and the movable holding member 5 includes:
A plurality of upper guide rollers 6 that engage with the upper part of the guide rail 3 and a lower guide rail 7 that engage with the lower part of the guide rail 3 are attached, and movable columns 4 that are adjacent to each other in the longitudinal direction of the scaffold frame are connected to telescopic link fences 8. A work scaffold having a retractable link type safety fence, characterized in that the fence is connected via a telescopic link type safety fence.