JP3778561B2 - Simple work scaffold - Google Patents

Description

  The present invention relates to a simplified work scaffold, and more particularly to a simplified work scaffold that can be used by being attached to a footrest in a manhole.

When working in a manhole, a simple work scaffold is attached to a footrest placed on the wall of the manhole. As this simplified work scaffold, one having a hook attached to one end of a support frame and a work table attached to the other end is known (see, for example, Patent Document 1). The work table is provided with support legs that are pressed against a side wall such as a manhole. In such a simple work platform, the work table becomes almost horizontal by hooking a hook on a footrest in the manhole and pressing the support leg of the work table against the side wall. Therefore, the operator can work using this work table as a scaffold.
Registered Utility Model No. 3017481

  In a conventional simplified work scaffold, support legs provided on a work table are formed by extending both ends in the width direction of the work table as they are. In such a conventional scaffold, since the support width by the support leg cannot be larger than the width of the work table, there is a possibility that it becomes unstable.

  An object of the present invention is to enable stable support of a work table even when the width of the work table is relatively narrow.

The simplified work scaffold according to claim 1 is a scaffold used when working in a place where there is a footrest on the wall, and includes a hook that can be attached to the footrest, a support, a work table, and two With support legs. The support is provided with a hook, and extends along the wall surface when the hook is attached to a footrest. The work table was provided so as to extend in a direction substantially orthogonal to the support on the side opposite to the side on which the hook of the support was mounted. The two support legs are provided so as to extend from the part of the workbench where the column is connected so as to spread toward the opposite side of the workbench across the column, and each tip is wider than the width of the workbench Touch the wall. When this simplified work scaffold is used in, for example, a manhole, a work table is horizontally supported by attaching a hook to a footrest on a wall surface in the manhole and pressing the tips of two support legs against the wall surface.

  Here, since the tips of the two support legs contact the wall surface at an interval wider than the width of the work table, the whole is stably supported even when the width of the work table is narrow.

  The simplified work scaffold according to claim 2 is the simplified work scaffold according to claim 1, wherein the hook can be adjusted in the vertical position on the support column.

  In this simple work scaffold, the distance between the hook and the work table can be changed by adjusting the position of the hook up and down, and the work table can be set at a position where it is easy to work.

  The simplified work scaffold according to claim 3 is the simplified work scaffold according to claim 1 or 2, wherein the work table is telescopic.

  Here, for example, in manholes, the internal width (internal diameter) is not uniform, and various standards exist. Therefore, if the work table has a fixed length, it cannot cope with manholes of various standards.

  Therefore, in the invention according to this claim, the work table is made extendable so that the length can be appropriately changed according to the place of use. For this reason, an application range becomes wide.

  The simplified work scaffold according to claim 4 is the simplified work scaffold according to any one of claims 1 to 3, wherein the two support legs are arranged such that the tips of the support legs are separated from each other as they are separated from the support column. Is growing.

  A simplified work scaffold according to a fifth aspect is the simplified work scaffold according to any one of the first to fourth aspects, wherein the support legs are each extendable.

  In this simplified work scaffold, each support leg can be expanded and contracted, so that the length of the support leg can be adjusted according to the shape of the wall surface, and the support leg can be reliably brought into contact with the wall surface.

  A simplified work scaffold according to a sixth aspect is the simplified work scaffold according to any one of the first to fifth aspects, wherein the support leg has an elastic member at a tip portion contacting the wall surface.

  Here, since the elastic member is attached to the tip of the support leg, the contact portion between the wall surface and the support leg is stabilized.

  A simplified working scaffold according to a seventh aspect is the simplified working scaffold according to any one of the first to sixth aspects, wherein the footrest is a hardware attached to the wall surface of the manhole.

  A simplified work scaffold according to an eighth aspect of the present invention is the simplified work scaffold according to any one of the first to seventh aspects, further comprising a reinforcing member that couples and reinforces the support column and the work table.

  In the present invention, the simple work scaffold can be stabilized regardless of the width of the work table.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a simplified work scaffold 1 in a first embodiment of the present invention, and FIG. 2 is a plan view thereof. This simplified work scaffold 1 is a scaffold used when working in a place such as a manhole where there is a footrest on the wall, and includes a mounting hook 2, a drop-off prevention chain 4, a column 3, and a carry handle 5. And a workbench step 6 and a support leg 7.

  As shown in FIG. 1, the attachment hook 2 is attached to a footrest (see FIG. 9) present on the wall surface, and is attached to the column 3. The attachment hook 2 is formed by bending a flat plate into an inverted J shape, and has a flat attachment portion 2b, a curved portion 2c, and a flat tip portion 2d. And as shown in FIG. 5, the two screws 2a are formed in the attachment part 2b along with the perpendicular direction. Further, a drop-off prevention chain 4 is attached to the tip 2d.

The support pillar 3 is a member that is attached to the attachment hook 2 and extends along the wall surface when the attachment hook 2 is attached to the footrest, and is a plate-like member. Further, the work column step 6 is disposed at the lower end of the column 3 and, as shown in FIG. 5, six holes 3a are provided in the vertical direction. The hole 3 a is used for fixing the attachment hook 2 to the column 3 by the screw 2 a and the attachment hook position adjusting screw 10. Further, a carry handle 5 is fixed to the upper end of the column 3. The carry handle 5 is a handle portion for holding the simplified work scaffold 1 and is formed by bending a rod-like member into a U-shape.

  The drop-off prevention chain 4 is a member formed in a chain shape as shown in FIGS. 1 and 5. A carabiner 4 a is provided on a part of the drop-off prevention chain 4. The fall-off prevention chain 4 is secured to a chain hanging bracket 8 fixed to a hole 3a formed at the bottom of the support column 3 so that the simplified work scaffold 1 does not fall off from the footrest. Is. The fall prevention chain 4 can also be used when the simplified work scaffold 1 is suspended or lifted by holding the end portion not connected to the chain hanging bracket 8.

  The workbench step 6 is a plate-like member that extends in a direction substantially orthogonal to the column 3 on the side opposite to the side on which the mounting hook 2 of the column 3 is mounted. On the upper surface of the work table step 6, as shown in FIG. 2, irregularities 6a for preventing slipping are formed.

  As shown in FIG. 4, the support legs 7 are provided so as to extend in the direction opposite to the work table step 6 with the support column 3 sandwiched between the work table steps 6, and their tips are wider than the width of the work table step 6. The two members are in contact with the wall surface, and are fixed to the end of the work table step 6 on the wall surface side on the same plane as the work table step 6. The support leg 7 includes a support leg fixing bracket 7a and a support leg 7b. The support leg fixing bracket 7 a is a member for fixing the support leg 7 b, and the distance between the end portions on the wall surface side is wider than the width of the work table step 6. Therefore, even when the support leg 7b is the shortest, the distance between the end portions on the wall surface of the support leg 7b is wider than the width of the work table step 6. The support leg fixing bracket 7a is formed by bending both side portions of a flat plate, and four holes 7c are provided in the flat plate portion. The support leg 7b is a part for contacting the wall surface and supporting the work table step 6, and is formed by bending the cross section into a U-shape. A support leg fixing screw 7d is provided on a flat plate portion of the support leg 7b. By inserting the support leg fixing screw 7d into a hole 7c of the support leg fixing metal 7a, the support leg 7b is fixed to the support leg fixing metal 7a. . A stabilizing rubber 9 is fixed to the end of the support leg 7b on the wall surface side. The stabilizing rubber 9 is used to ensure that the end of the support leg 7b contacts the wall surface, and the stabilizing rubber 9 is attached to the support leg 7b by a screw.

  When using the simplified work scaffold 1, as shown in FIGS. 7 and 9, the length of the support leg 7 and the position of the mounting hook 2 are adjusted and then placed on the wall surface. The attachment hook 2 is attached to the existing footrest, and the support leg 7b is brought into contact with the wall surface. Thereafter, the carabiner 4 a of the drop-off prevention chain 4 is fixed to the chain hanging bracket 8. In this case, the simplified work scaffold 1 can be made difficult to drop off. After the simplified work scaffold 1 is attached to the hardware on the wall in this manner, the drop-off prevention chain 4 is fixed to the chain hanging bracket 8 and the work is performed on the work table step 6. In this case, since the distance between the end portions on the wall surface of the support leg 7b is longer than the width of the work table step 6, the distance between the end portions on the wall surface of the support leg 7b is The workbench step 6 is more stable than when the width is equal to or shorter than the width. Further, as shown in FIGS. 7 and 8, since the length of the support leg 7 can be adjusted, it can be used in manholes having various shapes.

  When changing the height position of the attachment hook 2, the screw 2a of the attachment hook 2 is inserted into the hole 3a at the position to be attached, and the attachment hook position adjusting screw 10 is fitted into the screw 2a. At this time, the height position of the mounting hook 2 on the column 3 can be changed. Therefore, the distance between the mounting hook 2 and the work table step 6 can be changed, and the leg hardware does not hinder the attachment even in a place where the leg hardware further exists on the lower side in the vertical direction. In this case, as shown in FIG. 10, it can be attached even in a place where there is a footrest on the lower side in the vertical direction, and the work can be easily performed.

  When adjusting the length of the support leg 7, as shown in FIG. 4, the support leg fixing bracket 7 a is supported by inserting the support leg fixing screw 7 d of the support leg 7 b into the hole 7 c at the place where adjustment is desired. The leg 7b is fixed.

[Second Embodiment]
Below, 2nd Embodiment of this invention is described with reference to drawings. FIG. 11 is a side view of the simplified work scaffold 21 in the second embodiment. FIG. 12 is a plan view of the second embodiment. The simplified work platform 21 has substantially the same configuration as that of the first embodiment with respect to members other than the work table step 6, and therefore the work table 26 will be described in detail.

  The simplified work platform 21 includes a mounting hook 22, a drop prevention chain 24, a support 23, a carry handle 25, a work table 26, and a support leg 27. A carry handle 25 is fixed to one end of the column 23, and a work table 26 and a support leg 27 are disposed on the other end. A mounting hook 22 can be mounted on the column 23, and a drop-off prevention chain 24 is mounted on the mounting hook 22.

The work table 26 is a member that extends in a direction substantially orthogonal to the support column 23 on the side opposite to the side on which the mounting hook 22 of the support column 23 is mounted, and includes a work table step 26a that extends in one direction. A telescopic workbench step 26b. The workbench step 26a includes a step portion 26c, an outer peripheral portion 26d that forms the periphery of the step portion 26c, and a turn-back portion 26e. As shown in FIG. 13, the step portion 26c is a plate-like member extending in one direction, and has an uneven surface 26f for preventing slippage on the upper surface. The outer peripheral portion 26d is a plate-like portion formed vertically downward from the side portion other than the side surface on which the column 23 of the step portion 26c is disposed, and the outer peripheral portion 26d extends in the same direction as the step base 26c extends. 10 holes 26g are formed along the same direction as the step base 26c extends. A telescopic work table step fixing screw 26l is disposed in the hole 26g. As shown in FIG. 14, the folded portion 26e is a portion bent inward from the outer peripheral portion 26d. The telescopic workbench step 26b is a member used when performing work at a place far from the wall surface, and includes a telescopic step part 26h and a telescopic outer peripheral part 26i constituting the periphery of the telescopic step part 26h. The expansion / contraction step portion 26h is a plate-like member, and has a non-slip uneven portion 26j on the surface. The outer peripheral part 26i for expansion and contraction is a part in which the side part other than the side where the column 23 is arranged is bent downward in the vertical direction. The expansion / contraction outer peripheral portion 26i is formed with ten holes 26k along the same direction as the expansion / contraction step portion 26h extends.

  Also in the second embodiment, the mounting hook 22 can be attached to the support post 23 as in the first embodiment, and the length of the support leg 27 can be adjusted. Moreover, the usage method of the drop-off prevention chain 24 and the usage method of the simplified work scaffold 21 are the same as those in the first embodiment.

  When adjusting the length of the workbench 26, the telescopic workbench step 26b is slid from the workbench step 26a, and a part of the hole 26g of the outer peripheral portion 26d of the workbench step 26a and the workbench step 26b for expansion / contraction are set. A part of the hole 26k of the outer peripheral part 26i for expansion / contraction is overlapped, and both are coupled by the three work table fixing screws 26l for expansion / contraction. At this time, as shown in FIG. 15, it can be used even in a manhole having a large diameter.

  Here, the case where the simple work scaffolds 1 and 21 are used in the manhole has been described. However, these simple work scaffolds 1 and 21 can be used anywhere as long as there are footrests on the wall surface.

[Third Embodiment]
Below, 3rd Embodiment of this invention is described with reference to drawings. FIG. 16 is a side view of the simplified work scaffold 31 in the third embodiment. The simplified work scaffold 31 has substantially the same configuration as that of the first embodiment except for the reinforcing member 39 that reinforces the column 33 and the workbench step 36 by coupling them. Explained.

  The simplified work scaffold 31 includes a mounting hook 32, a drop prevention chain 34, a support 33, a carry handle 35, a workbench step 36, and a support leg 37. A carry handle 35 is fixed to one end of the column 33, and a work table step 36 and a support leg 37 are disposed on the other end. A mounting hook 32 can be mounted on the column 33, and a drop-off prevention chain 34 is mounted on the mounting hook 32.

  The reinforcing member 39 is a member for joining and reinforcing the support column 33 and the work table step 36, and is a plate-like member. One end of the reinforcing member 39 is rotatably fixed on the support column, and the other end can be connected to the work table step, and can take a retracted position shown in FIG. 17 and a set position shown in FIG.

  In cases other than when a large load is applied to the workbench step 36, the other end of the coupling member 39 can be fixed on the column 33 as shown in FIG. 17 and used in the same manner as in the first embodiment. it can. On the other hand, when a large load is applied to the workbench step 36, the other end of the coupling member 39 is fixed on the workbench step 36 as shown in FIG. At this time, since the work table step 36 is supported by the support column 33 and the coupling member 39, the strength becomes higher than the case where the other end of the coupling member 39 is on the support column, and the simplified work scaffold 39 is not easily broken.

Further, as shown in FIG. 18, as another embodiment, as shown in the second embodiment, a combination of a support 43 and a work table 46 is combined with a simplified work scaffold 41 that can adjust the length of the work table 46. It is also conceivable to provide the member 49.

1 is a side view of a simplified work scaffold 1 according to an embodiment of the present invention. 1 is a plan view of a simplified work scaffold 1 according to an embodiment of the present invention. The figure which looked at the simplified work scaffold 1 in one Embodiment of this invention from the perpendicular direction lower side. The figure seen from the perpendicular direction lower side of the simple type work scaffold 1 in one Embodiment of this invention. 1 is a front view of a simplified work scaffold 1 according to an embodiment of the present invention. The rear view of the simplified work scaffold 1 in 1 embodiment of this invention. The figure at the time of mounting | wearing the manhole with the simplified work scaffold 1 in one Embodiment of this invention. The figure at the time of mounting | wearing the manhole of a non-circular cross section with the simplified work scaffold 1 in one Embodiment of this invention. The figure when the simple type work scaffold 1 in one Embodiment of this invention is actually used. The figure which shows the state which is using the simple work scaffold 1 in the place where a footrest exists in the vertical direction lower side. The side view of the simplified work scaffold 21 in 2 embodiment of this invention. The top view of the simplified work scaffold 21 in 2 embodiment of this invention. The figure which looked at the simple type work scaffold 21 in 2 embodiment of this invention from the perpendicular direction lower side. The figure seen from the perpendicular direction lower side of the simple type work scaffold 21 in 2 embodiment of this invention. The figure at the time of adjusting the length of the work bench | platform 26 and attaching the simplified work scaffold 21 in 2 embodiment of this invention to the manhole. The side view of the simplified work scaffold 31 in 3rd Embodiment. The side view of the simplified work scaffold 31 in 3rd Embodiment. The side view of the simplified work scaffold 41 in other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Simple work scaffold 2 Attachment hook 3 Support | pillar 4 Fall-off prevention chain 5 Carry handle 6 Worktable step 7 Support leg part 8 Chain hanging bracket 9 Stabilization rubber 10 Attachment hook position adjustment screw 21 Simple work scaffold 22 Attachment hook 23 Strut 24 Fall prevention chain 25 Carry handle 26 Work table 27 Support leg 28 Chain hanging bracket 29 Stabilizing rubber 30 Mounting hook position adjusting screw

Claims (8)

A scaffold used when working in a place where there is a footrest on the wall,
A hook attachable to the footrest,
The hook is mounted, and a post extending along the wall surface when the hook is attached to the footrest;
A workbench provided extending in a direction substantially orthogonal to the support on the opposite side of the support to the side on which the hook is mounted;
The work table is provided so as to extend from the portion where the support column is connected to the work table so as to spread toward the opposite side of the work table , with each tip being spaced at a wider interval than the width of the work table. With two support legs in contact with the wall,
Simple work scaffold. The hook can be adjusted in the vertical position on the column.
The simplified work scaffold according to claim 1. The work table is telescopic,
The simplified work scaffold according to claim 1 or 2. The two support legs spread so that their tips are separated from each other as they are separated from the support column.
The simplified work scaffold according to any one of claims 1 to 3. Each of the support legs is telescopic,
The simplified work scaffold according to any one of claims 1 to 4. The two support legs have an elastic member at a tip portion that contacts the wall surface,
The simplified work scaffold according to any one of claims 1 to 5. The footrest hardware is a hardware attached to the wall surface of the manhole.
The simplified work scaffold according to any one of claims 1 to 6. A reinforcement member for coupling and reinforcing the support column and the work table;
The simplified work scaffold according to any one of claims 1 to 7.

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