JP6946047B2 - Falling object prevention net - Google Patents

Description

The present invention relates to a falling object prevention net used by being attached to a handrail of a work platform of an aerial work platform when inspecting / repairing a lighting fixture or the like in a tunnel of a general road or an automobile-only road.

When inspecting and repairing lighting fixtures in tunnels on general roads and motorways, aerial work platforms with a work platform that can be raised and lowered are often used. A falling object prevention net is used to prevent repair parts and tools from falling toward the road surface.

Conventionally, as the falling object prevention net, those having various shapes, structures, and functions have been proposed, but as those related to the present invention, for example, "falling objects for live-line work" described in Patent Document 1 There is a "capture net" or a "falling object capture device for aerial work platforms" described in Patent Document 2.

JP-A-2002-199529 Japanese Unexamined Patent Publication No. 2003-286772

The fallen object prevention net is used by attaching it to the handrail of the aerial work platform that has traveled to the work site. After use, it can be removed from the handrail of the work platform for storage or moved to another work site. It is necessary to let them do it.

For this reason, the requirements for a fallen object prevention net are that the workbench can be easily attached to and detached from the handrail, that the net can be stretched according to the size required at the work site, and that the net can be installed after use. It can be stored compactly.

However, the actual situation is that the conventional falling object prevention net cannot sufficiently satisfy the above-mentioned requirements.

Therefore, the problem to be solved by the present invention is that the work platform of the aerial work platform can be easily attached to and detached from the handrail, the range of the net can be changed, and when it is stored or moved. The purpose is to provide a fallen object prevention net that can be stored compactly.

In order to solve the above problems, the falling object prevention net of the present invention is a fall prevention net that is detachably attached to a grid-like handrail portion provided on a work platform of an aerial work platform.
A stay body having a hanging portion that detachably engages with the upper horizontal member constituting the handrail portion in an upright posture and having a first engaging portion having an L-shaped vertical cross section.
A portal-shaped second engaging portion that is movably attached to the lower part of the stay body along the longitudinal direction of the stay body and detachably grips the lower horizontal member located below the upper horizontal member is provided on the back surface. With the adjustment guide you have
A movable stay that is pivotally supported in a direction that approaches and separates from the handrail portion with a portion near the lower end of the stay body as a fulcrum.
A plurality of net support units having a belt that holds the movable stay in an inclined posture with respect to the stay body, and
It is provided with a net stretched between at least a pair of net support units arranged at positions separated in the horizontal direction of the upper horizontal member, and a net locked to the net support unit and the upper horizontal member. It is characterized by.

Here, in the falling object prevention net, it is desirable that the length of the movable stay can be changed.

Further, in the falling object prevention net, when the movable stay and the stay main body are brought closest to each other by relatively rotating around the fulcrum, a gap is provided between the stay main body and the movable stay. It is desirable to provide a stopper that forms a.

Further, it is desirable that the falling object prevention net is provided with a hook for locking the net at the tip of the movable stay.

On the other hand, in the falling object prevention net, it is desirable that the stay body and the member forming the movable stay are polygonal cylinders.

Further, in the fallen object prevention net, a hook-and-loop fastener that can be engaged with and detached from each other may be provided at a side edge portion of the net located along the belt of the net support unit.

According to the present invention, it is easy to attach / detach the work platform of an aerial work platform to / from the handrail, the range of the net can be changed, and a falling object can be stored compactly when stored or moved. A prevention net can be provided.

It is a partially omitted perspective view which shows the state which attached the falling object prevention net which is an embodiment of this invention to a handrail. It is a partially omitted side view which shows the net support unit seen from the direction of arrow A in FIG. It is a partially cutaway side view which shows the state which the movable stay of the net support unit shown in FIG. 2 is folded. It is a rear view of the movable stay seen from the arrow line B direction in FIG. FIG. 3 is a partially omitted cross-sectional view taken along the line CC in FIG.

Hereinafter, the falling object prevention net 100 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5. As shown in FIG. 1, the falling object prevention net 100 of the present embodiment is used by being detachably attached to a grid-like handrail portion 1 provided on a work platform (not shown) of an aerial work platform. Is. The falling object prevention net 100 is stretched between a pair of net support units 50, 50 arranged at positions separated in the horizontal direction of the upper horizontal member 1a and the lower horizontal member 1b, and these net support units 50, 50. The nets are provided with net support units 50, 50 and a net 60 locked to the upper horizontal member 1a.

As shown in FIGS. 1 to 4, the net support unit 50 has a stay body 10 having a first engaging portion 11 that detachably engages with the upper horizontal member 1a constituting the handrail portion 1 in an upright posture, and a stay. An adjustment guide 20 having a second engaging portion 21 that is movably attached below the main body 10 along the longitudinal direction of the stay main body 10 and detachably engages with the lower horizontal member 1b located below the horizontal member 1a. A movable stay 30 rotatably supported in a direction approaching and separating from the handrail portion 1 with a support shaft 31 near the lower end of the stay body 10 as a fulcrum, and a movable stay with respect to the stay body 10. It has a belt 40 that holds 30 in an inclined posture.

The belt 40 is provided so as to connect the upper end portion 10a of the stay body 10 and the tip end portion 30a of the movable stay 30. The length of the belt 40 can be changed by moving the position of the buckle 41, whereby the distance between the upper end portion 10a of the stay body 10 and the tip end portion 30a of the movable stay 30 can be changed.

As shown in FIG. 1, a plurality of through holes 61a are provided at equal intervals along the longitudinal direction of the horizontal trailing edge portion 61 above the net 60, and a string-like body inserted into each through hole 61a. By connecting 2 to the upper horizontal member 1a of the handrail portion 1, the horizontal trailing edge portion 61 of the net 60 is detachably locked to the upper horizontal member 1a. The left and right ends of the horizontal leading edge 64 of the net 60 are detachably locked to the J-shaped hooks 33 provided at the tip 30a of the movable stay 30.

The vertical trailing edge 62 behind the net 60 is detachably locked to the stay body 10 by a belt 3 wound around the stay body 10. The inclined lower edge portion 63 of the net 60 is detachably locked to the movable stay 30 by a belt 4 wound around the movable stay 30.

As shown in FIGS. 2 to 5, the stay main body 10 constituting the net support unit 50 is formed of a square cylindrical member, and an adjustment guide 20 formed of a square cylindrical member is stayed on the outer periphery of the stay main body 10. It is fitted so as to be slidable along the longitudinal direction of the main body 10. On the outer circumference of the adjustment guide 20, a screw-type stopper knob 23 for fixing the adjustment guide 20 to the stay body 10 so as to be detachable is provided.

The upper end portion 10a of the stay body 10 is provided with a first engaging portion 11 having an L-shaped vertical cross section and having a hanging portion 11a. On the back surface (rear surface) of the hanging portion 11a, a detachment prevention portion 11b having a shape of hanging further downward than the hanging portion 11a is provided.

A gate-shaped second engaging portion 21 is provided on the back surface (rear surface) of the adjustment guide 20, and the second engaging portion can be engaged and disengaged with respect to the lower horizontal member 1b gripped in the second engaging portion 21. A screw-type stopper knob 22 for fixing to is provided.

The movable stay 30 constituting the net support unit 50 includes an octagonal cylinder-shaped outer cylinder 34 and an octagonal cylinder-shaped inner cylinder 35 slidably inserted into the outer cylinder 34. Since the inner cylinder 35 is slidable (movable in and out) with respect to the outer cylinder 34 in the longitudinal direction, the length of the entire movable stay 30 can be changed. The base end portion of the hook 33 is fixed to the tip end portion 30a (tip portion of the inner cylinder 35) of the movable stay 30.

As shown in FIG. 2, the movable stay 30 is rotatable about the support shaft 31 with respect to the stay main body 10. On the back surface (rear surface) of the base end portion 30b of the movable stay 30, a pair of side plates 32b and 32b that sandwich both side surfaces of the lower end portion 10b of the stay body 10 and a bottom plate that connects the lower edges of the side plates 32b and 32b to each other. The connecting member 32 provided with 32a is fixed. As shown in FIG. 5, the support shaft 31 is provided so as to communicate the pair of side plates 32b and 32b of the connecting member 32 and the stay body 10.

Therefore, as shown in FIG. 2, when the movable stay 30 is rotated in the direction away from the stay main body 10 around the support shaft 31, the bottom plate 32a of the connecting member 32 becomes the lower end portion 10b of the stay main body 10. It comes into contact with the back surface (rear surface), and the movable stay 30 cannot rotate any more. In the present embodiment, the movable stay 30 is set to be held in an inclined posture at a position where the deployment angle R between the stay body 10 and the movable stay 30 is about 84 degrees, but the present embodiment is limited to this. is not it.

On the other hand, as shown in FIG. 3, when the movable stay 30 and the stay main body 10 are brought close to each other by relatively rotating around the support shaft 31, a stopper projecting from the front surface (front surface) of the stay main body 10 is provided. The 24 abuts on the back surface (rear surface) of the movable stay 30, whereby a gap V is formed between the stay body 10 and the movable stay 30.

Here, the usage method, functions, and the like of the fallen object prevention net 100 will be described with reference to FIGS. 1 to 4. When the falling object prevention net 100 is used, the vertical trailing edge portions 62 and the inclined lower edge portions 63 of the left and right side surfaces 65 and 65 of the net 60 arranged between the pair of net support units 50 and 50 are attached to the belts 3 and 3, respectively. It is locked to the stay main body 10 and the movable stay 30 via 4.

Next, as shown in FIG. 1, the first engaging portions 11 and 11 of the stay bodies 10 and 10 of the pair of net support units 50 and 50 are placed on the upper horizontal member of the handrail portion 1 of the work platform of the aerial work platform. Hook on 1a. After that, the stopper knobs 23 of the respective net support units 50 are loosened, the adjustment guide 20 is slid along the stay body 10, and the second engaging portion 21 is hooked on the lower horizontal member 1b.

Next, the stopper knobs 22 and 23 of one of the net support units 50 are tightened, and the net support unit 50 is locked to the lower horizontal member 1b. After that, the other net support unit 50 is moved along the longitudinal direction of the upper horizontal member 1a and the lower horizontal member 1b to adjust the distance between the one net support unit 50 and the other net support unit 50. After setting the horizontal trailing edge 61 of the net 60 so as to form a straight line along the upper horizontal member 1a, when the stopper knobs 22 and 23 are tightened, the net 60 is placed between the two net support units 50 and 50. Temporarily locked.

Next, after locking the horizontal trailing edge 61 of the net 60 to the upper horizontal member 1a using the plurality of string-like bodies 2, the buckle 41 is adjusted and the belt 40 is set so as to be in a straight line state. For example, the attachment of the falling object prevention net 100 to the handrail portion 1 is completed. As shown in FIG. 1, since the falling object prevention net 100 has a shape that opens in a kangaroo pocket shape in front of the handrail portion 1, it reliably captures repair parts, tools, etc. that have fallen accidentally during work at a high place. be able to.

On the other hand, when the work at a high place is completed and the falling object prevention net 100 is withdrawn, the falling object prevention net 100 can be easily separated from the handrail portion 1 by performing the work in the reverse procedure of the above-described procedure. .. Therefore, the falling object prevention net 100 can be easily attached to and detached from the handrail of the work platform of the aerial work platform.

Further, in the falling object prevention net 100, since the size of the net 60 in the left-right direction (the longitudinal direction of the horizontal trailing edge portion 61 and the horizontal leading edge portion 64 of the net 60) is not limited, the size of the net 60 in the left-right direction is changed. Alternatively, by arranging a plurality of falling object prevention nets 100 side by side in the left-right direction, it is possible to change the extension range of the net 60, so that it is possible to appropriately respond to various work situations.

When a net 60 having a long size in the left-right direction is used, one or more net support units 50 may be arranged between the pair of left and right net support units 50, 50 to support the net 60.

As shown in FIG. 1, in the net 60 constituting the fallen object prevention net 100, the left and right side edge portions 66, 66 located along the belt 60 of the net support unit 50 are hook-and-loop fasteners that can be engaged with each other. It is equipped with 67,67 (for example, "magic tape (registered trademark)"). Therefore, when a plurality of falling object prevention nets 100 are arranged side by side in the left-right direction, adjacent side edge portions 66, 66 are joined to each other without gaps by engaging the respective surface fasteners 67, 67 with each other. Can be done.

Therefore, it is possible to prevent tools, repair parts, and the like from falling from between the side edges 66, 60 of the two adjacent nets 60, 60 during work at a high place. Since the hook-and-loop fasteners 67 and 67 in the engaged state can be separated by applying an external force, the removal work after use is easy.

Next, when the falling object prevention net 100 separated from the handrail portion 1 of the work platform of the aerial work platform is stored, the stay main body 10 and the movable stay 30 of the left and right net support units 50 and 50 are as shown in FIG. The rod-shaped net support unit 50, which is folded into a rod shape and is locked to the vertical trailing edge portion 62 and the inclined lower edge portion 63 at the left and right portions of the net 60, is used as the core from the left and right portions of the net 60. If the nets 60 are wound around each, the falling object prevention net 100 will be in the shape of a railing, so that it can be put together in a small size. Therefore, the falling object prevention net 100 can be stored compactly when it is stored or moved.

On the other hand, as shown in FIG. 3, when the movable stay 30 and the stay body 10 are folded, the stopper 24 projecting from the front surface (front surface) of the stay body 10 comes into contact with the back surface (rear surface) of the movable stay 30. A gap V is formed between the stay body 10 and the movable stay 30. Therefore, when the movable stay 30 and the stay main body 10 are folded, it is possible to prevent an accident such as pinching a finger between the movable stay 30 and the stay main body 10.

The storage method of the fallen object prevention net 100 described above is an example, and the storage method is not limited to this. Therefore, a storage method according to the storage space and the moving situation can be adopted.

The falling object prevention net 100 described with reference to FIGS. 1 to 5 shows an example of the falling object prevention net according to the present invention, and the falling object prevention net according to the present invention is limited to the above-mentioned falling object prevention net 100. Not done.

The fallen object prevention net according to the present invention shall be widely used by being attached to the handrail of the work platform of an aerial work platform when inspecting or repairing lighting equipment in tunnels of general roads or motorways. Can be done.

1 Handrail part 1a Upper horizontal member 1b Lower horizontal member 2 String-shaped body 3, 4, 40 Belt 10 Stay body 10a Upper end 10b Lower end 11 First engaging part 11a Hanging lower part 11b Disengagement prevention part 20 Adjustment guide 21 Second engagement Joints 22, 23 Stopper knob 30 Movable stay 30a Tip 30b Base end 31 Support shaft 32 Connecting member 32a Bottom plate 32b Side plate 33 Hook 34 Outer cylinder 35 Inner cylinder 41 Buckle 50 Net support unit 60 Net 61 Horizontal trailing edge 61a Through hole 62 Vertical trailing edge 63 Inclined lower edge 64 Horizontal leading edge 65 Side 66 Side edge 67 Face Fastener 100 Falling object prevention net R Deployment angle V Void

Claims (6)

A fall prevention net that can be detachably attached to the grid-shaped handrails provided on the work platform of aerial work platforms.
A stay body having a hanging portion that detachably engages with the upper horizontal member constituting the handrail portion in an upright posture and having a first engaging portion having an L-shaped vertical cross section.
A portal-shaped second engaging portion that is movably attached to the lower part of the stay body along the longitudinal direction of the stay body and detachably grips the lower horizontal member located below the upper horizontal member is provided on the back surface. With the adjustment guide you have
A movable stay that is pivotally supported in a direction that approaches and separates from the handrail portion with a portion near the lower end of the stay body as a fulcrum.
A plurality of net support units having a belt that holds the movable stay in an inclined posture with respect to the stay body, and
It is provided with a net stretched between at least a pair of net support units arranged at positions separated in the horizontal direction of the upper horizontal member, and a net locked to the net support unit and the upper horizontal member. A fallen object prevention net featuring. The falling object prevention net according to claim 1, wherein the length of the movable stay can be changed. Claim 1 or 2 provided with a stopper that forms a gap between the stay body and the movable stay when the movable stay is brought closest to the stay body by rotating around the fulcrum. The described fall object prevention net. The fallen object prevention net according to any one of claims 1 to 3, wherein a hook for locking the net is provided at a tip end portion of the movable stay. The fallen object prevention net according to any one of claims 1 to 4, wherein the stay body and the member forming the movable stay are polygonal cylinders. The fallen object prevention net according to any one of claims 1 to 5, wherein the side edge portion of the net located along the belt of the net support unit is provided with a hook-and-loop fastener that can be engaged with and detached from each other.

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