JPH0941656A - Fall preventing device for wall working - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fall preventing device which can surely receive them in the case of falling of tools or workers by mistake during a wall work, can ascend or descend by temporarily avoiding an obstacle in the case of existence of it near the wall of a building, and is a very simple device for carry-in to a jobfield and suitable for manual carrying. SOLUTION: This fall preventing device for a wall operator is constituted of a fall preventing cage 1 hung so as to be positioned directly under a wall worker 42, two ropes 2, 2 for hanging the fall preventing cage 1 from the rooftop 35, and a brake device for freely stopping the ropes 2, 2. The brake device is operated by remote control operated by the worker 42. The fall preventing cage 1 is constituted by hanging a receiving part from a frame part formed out of long bars in the lengthwise direction and lateral bars in the shortend direction, the lateral bars are formed capably of being folded, and in the case of existence of an obstacle, the lateral bars are folded up so as to narrow the depth. Also at carry-in, the bars are folded so as to carry it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall work fall prevention device for hanging a rope and performing cleaning, painting, etc. on a wall surface of a building or the like. For more details, install it directly below the worker who is suspended from the rooftop by a rope and accidentally drop the work tool. The present invention relates to a device for preventing the development.

[0002]

2. Description of the Related Art Recently, a high-rise building having more than 10 floors is provided with a gondola lifting device for outer wall work in advance for cleaning when building a building. Is rarely provided with such a device. When performing outer wall work in a building that does not have a gondola lifting device, if the work takes a long time or if many materials are required for the work, temporarily install the gondola lifting device. When there is no place to install, or when the work is to be completed in a short time due to cleaning of walls and windows, as shown in Fig. 5, the rope 45 is hung from the roof as in the case of mountaineering. Wrap around the body of the person 42, or sit on a swing-like chair 43, and work while gradually sliding down with a stop fitting. In addition, even when there are obstacles such as trees 36 and electric wires near the building wall surface 4 and the gondola cannot be used, work may be performed using only the rope 45. Conventionally, when performing work on the outer wall of such a building, the cleaning work with the rope 45 is not enough.
In particular, do not take measures to prevent falling. When the work is heavy, as shown in FIG. 5, a net 44 for catching a fallen object may be installed below the building.

[0003]

In order to install the net 44 as shown in FIG. 5, it is necessary to have a height that does not obstruct the passage of people and vehicles. Not only is the work more troublesome than the work, but there is also a problem in some buildings that there is no clue to attach the net 44 to the wall surface. Also, this net 4
Numeral 4 is for the purpose of catching a dropped work tool and preventing it from hitting pedestrians while passing it, or changing the net 44 to a vinyl sheet to prevent scattering of contaminated water directly under cleaning work. Therefore, there is a problem that the worker cannot be surely protected if the worker falls.

The present invention is a device which is always located immediately below a worker and can surely catch a tool or a worker who has fallen by mistake, and an obstacle near the wall surface of a building. If there is, it is possible to avoid this temporarily, and further, it is an object of the present invention to obtain a fall prevention device that is extremely easy to carry on and install at the site and is suitable for carrying by hand.

[0005]

The present invention has been made in order to solve the above problems, and the operator 4 on the wall surface
2, a drop-preventing cage 1 hung by a rope 2 so as to be positioned immediately below 2, and a braking device for braking the rope 2 to stop the drop-preventing cage 1 at a predetermined position, The braking device is operated by the remote control. The fall-prevention cage 1 is constructed by suspending a storage part 9 in a frame part 10 composed of a long bar 7 in the longitudinal direction and a horizontal bar 8 in the short direction, and the horizontal bar 8 is formed to be foldable to prevent obstacles. When there is 36, the horizontal rail 8 is folded to narrow the depth, and further bag-shaped portions 5 and 6 are formed at the upper edges of the storage portion 9 in the longitudinal direction and the lateral direction, respectively. A long bar 7 and a horizontal bar 8 which are extendable and retractable are removably inserted into the shape portions 5 and 6.

[0006]

In the fall prevention cage 1, at least the long rail 7 is pulled out from the bag-shaped portion 5 of the storage portion 9 and the storage portion 9 and the long rail 7 are folded and transported, and the braking device is installed on the roof 35 or the like at the work site. Then, the drop-prevention cage 1 is hung by inserting a long rail through the bag-like portion 5 and connecting it to a braking device installed on the rooftop 35 with ropes 2 and 2. An operator operates a braking device with a remote controller to perform work while lowering the fall prevention cage 1 to an appropriate position. When the obstacle 36 approaches temporarily, the cross rail 8 is folded to reduce the depth of the fall prevention cage 1 to avoid it.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to FIGS.
It will be described based on. In FIG. 1, 1 is a width 240c
It is a substantially box-shaped drop-prevention cage having a depth of m, a depth of 120 cm, and a depth of 60 cm, and is suspended from the roof by two ropes 2 and 2 so as to face the wall surface 4 of the building. As shown in FIG. 2, the drop-prevention cage 1 includes a frame portion 10 composed of a long rail 7 and a horizontal rail 8 and a storage portion 9 attached thereto in an upper opening state. The storage portion 9 is provided with bag-shaped portions 5 and 6 in the longitudinal direction and the lateral direction of the opened upper edge portion, and the long rail 7 and the horizontal rail 8 which form the frame portion 10 are inserted therethrough. The storage part 9 is composed of a net 18 so as not to be shaken by the wind so much, but the bottom part thereof is composed of a waterproof sheet 20 or the like in order to catch a liquid or a small falling object.

As shown in FIG. 3 (a), the long crosspiece 7 has, for example, two U-shaped members 16, 16 coupled by a shaft 17,
When carrying it, it can be folded into about 1/2 length, but when used, when these members are extended, the ends of the central side 23 come into contact with each other to keep horizontal. The long rail 7 is inserted into the bag-shaped portion 5 of the storage portion 9. As shown in FIG. 3 (b), the horizontal rail 8 has two U-shaped members 25, 25 connected by a central shaft 26, and can be folded to a half length when carrying. However, when used, it is necessary to extend the space between these members so that the central side 27
The end portions of the two come into contact with each other so that they are kept horizontal. The horizontal rail 8 is inserted into the bag-shaped portion 6 of the storage portion 9.

A support rope 11 is coupled to the shaft 26 of the horizontal rail 8 of the fall prevention cage 1, and the upper end of the support rope 11 is coupled to the ring 12. Both ends of the horizontal rail 8 are the ring 1
It is connected to the pull-up rope 14 that passes through 2. The length of the pull-up rope 14 is set so that the folded side is substantially horizontal when extended. Drop prevention cage 1 above
Is hung by hanging the ring 12 on a hook with a stopper that is fixed to the ends of the two ropes 2, and the upper end of the rope 2 is installed on the rooftop 35 of the building. It is connected to the lifting device 3 supported by a hook.

As shown in FIG. 1 (a), the lifting device 3 projects from the edge of the roof 35 and the ropes 2 and 2 and the wall surface 4 of the building.
There are provided two arms 28, 28 for keeping a predetermined distance between them and an electric winch 29 for winding the ropes 2, 2. In the winch 29, a drum 31 for winding the rope 2 is fixed to a rotation shaft of a motor 30 with a speed reducer. The motor 30 is provided with a braking device so that it does not rotate when a torque is applied from the outside when the motor 30 is stopped. Pulleys 32 are provided at the ends of the left and right arms 28, 28,
The ropes 2, 2 led out from the drum 31 are hung down via the pulley 32.

Although not shown, one of the arms 28 is provided with a receiver so that the winch 29 is operated by receiving a signal from the remote controller operated by the operator 42. . The format of sending and receiving is infrared or F
It may be a wireless type using M radio waves or a wired type in which a receiver and a remote control are connected by electric wires. The remote control is provided with at least two operation buttons for "up" and "down", but in addition to this, operation buttons for controlling the speed may be provided. A push-on switch is used for each button, and the winch 29 does not operate when the remote control is released. Also,
The winch 29 is also provided with a similar operation button.

Next, the operation of the fall prevention device having the above construction will be described. When transporting to the work site, the fall prevention device
The storage unit 9, the two horizontal rails 8, 8, the two long rails 7, 7, the two arms 28, and the lifting device 3 are disassembled into pieces. The storage unit 9 is 2 from the center with the horizontal rail 8 inserted.
You may fold it and then fold it. Long rail 7 is folded in half. When pulling out the horizontal rails 8 from the storage portion 9, the horizontal rails 8 are folded in a V shape and pulled out from the gap between the adjacent bag-shaped portions 6.

Explaining the assembly at the work site, first,
The lifting device 3 is installed on the roof 35 of the building. Arms 28, 28 having a width of about 240 cm are installed on the edge of the roof 35 in accordance with the desired position, and a winch 29 is installed at the approximate center thereof. The two ropes 2 and 2 are pulled out from the winch 29 and hung down via the pulleys 32 of the left and right arms 28 and 28, respectively. At this time, the position of the winch 29 is adjusted so that the heights of the tips of the ropes 2 substantially match. Then, the "descent command" of the remote controller is operated to lower the rope 2 to the ground and stop it at a position of 50 cm to 1 m above the ground. Next, the fall prevention cage 1 is assembled on the ground.
Expand the storage unit 9 and extend the long bar 7 to store the storage unit 9 as described above.
The long rail 7 and the horizontal rail 8 are connected to each other with a metal fitting or the like by inserting the long rail 7 into the predetermined bag-shaped portion 5 in a predetermined direction. The ring 12 is securely fixed to the tip of the rope 2 hanging from the roof. When the lifting device 3 is only a braking device, the fall prevention cage 1 is assembled on the roof 35 and gradually lowered while applying braking.

At the time of work, the worker 42 working on the wall operates the remote controller to stop the fall prevention cage 1 at a distance as close as possible to the person who does not hinder the work. Worker 42 suspended by rope 45
Although there are individual differences in the range where people can work in one place,
As shown in (b), 240 cm in the horizontal direction and approximately 1 in the vertical direction.
It is about 60 cm. When the work at that place is finished, lower the fall prevention cage 1 with the remote control for the work interval,
The worker 42 also descends to the corresponding position to work. When the fall prevention cage 1 cannot be moved up and down due to obstacles such as trees 36 and electric wires during the work, one pulling rope 14
4 is pulled downward or upward, the horizontal rail 8 of the fall prevention cage 1 is lifted while rotating around the shaft 26 as shown in FIG. The depth can be narrowed, and if the pulling rope 14 is released after passing through the obstacle 36, it returns to the original position. If both pulling ropes 14 are pulled, as shown in FIG. 4 (c),
Both ends of the cross rail 8 can be lifted to further reduce the overall depth.

In the above embodiments, the fall prevention cage 1 has a substantially box shape, but the present invention is not limited to this, and the semi-arcuate storage portion 9 may hang down naturally. . Although both of the fall prevention cages 1 are foldable in the above embodiments, only one side may be foldable. In the above embodiment, the long crosspiece 7 is composed of two U-shaped members 16 and can be folded in two. However, the present invention is not limited to this, and three or more U-shaped members. It may be configured by 16 so that it can be folded into a smaller size, or may be a foldable type in which tubes of different thicknesses are overlapped so as to be expandable and contractible. Further, a screw-in type in which a male screw and a female screw are formed on each of both ends may be used.

In the above embodiment, the worker 42 is lowered to the fall prevention cage 1 and the tongue, but the lifting device 3 automatically raises and lowers the worker 42 together with the fall prevention cage 1. May be. However, in this case, a winch 29 having a large output is required, which reduces the ease of transportation.

In the above embodiments, the winch 29 using the electric motor is used to raise and lower the fall prevention cage 1. However, the present invention is not limited to this, and the operator himself or herself using a universal hook or the like. You may make it raise / lower by the force of. In this case, since the winch 29, which is the heaviest item, is not required, the entire device is extremely lightweight,
It will be easy to carry even by bicycle.

[0018]

As described above, according to the present invention, since the drop-preventing cage, which is within the reach of the operator suspended by the rope, can be always arranged immediately below the operator,
If you accidentally drop the tool, you can catch it, and even if the worker falls, you can catch it before the momentum of the fall and protect the worker reliably. It has the effect of. In addition, the long rail and the horizontal rail can be detached so that the storage section can be folded,
Since the long rail and the horizontal rail can be folded, it is highly portable.Moreover, as described above, the fall prevention cage is placed directly under the operator so that it can be caught before the force of the fall is given. , The impact resistance can be suppressed, the weight can be reduced, and it can be easily carried on a bicycle.

Further, the fall prevention cage of the present invention can easily narrow the depth even when it is suspended and used, and there is an obstacle such that the maximum depth of the fall prevention cage cannot pass through. However, it has the effect of being able to move up and down while avoiding this.

[Brief description of drawings]

FIG. 1 shows an embodiment of a fall prevention device of the present invention, (a) is a side view and (b) is a front view.

2 is an exploded perspective view showing a fall prevention cage of the apparatus of FIG. 1. FIG.

FIG. 3 shows parts of the frame portion of the cage of FIG. 2, (a)
Is a partially enlarged cross-sectional view of a long rail, and (b) is a partially enlarged cross-sectional view of a horizontal rail.

FIG. 4 is a schematic diagram showing a reduced depth of the cage of FIG.

FIG. 5 is a side view showing a conventional fall prevention device.

[Explanation of symbols]

1 ... Fall prevention cage, 2 ... Rope, 3 ... Lifting device, 4
... Wall surfaces of building, 5, 6 ... Bag-shaped portion, 7 ... Long rail, 8 ... Horizontal rail, 9 ... Storage section, 10 ... Frame section, 11 ... Support rope, 12
... Ring, 14 ... Pull-up rope, 15 ... Hook, 16 ... U-shaped member, 17 ... Shaft, 18 ... Net, 20 ... Waterproof sheet, 2
3 ... Central side, 25 ... U-shaped member, 25L, 25R ... End of U-shaped member, 26 ... Shaft, 27 ... Central side, 28 ... Arm, 29 ... Winch, 30 ... Motor with reduction gear, 31 ...
Drum, 32 ... Pulley, 35 ... Rooftop, 36 ... Trees.

Claims (4)

[Claims] 1. A fall prevention cage 1 hung by a rope 2 so as to be positioned directly below a worker 42 on a wall surface.
And a fall prevention device for wall surface work, which comprises a braking device for braking the rope 2 to stop the fall prevention cage 1 at a predetermined position. 2. The wall work fall prevention device according to claim 1, wherein the braking device is operated by a remote controller. 3. A fall prevention cage 1 comprises a long bar 7 in the longitudinal direction.
The storage portion 9 is hung from a frame portion 10 composed of a horizontal crosspiece 8 and a horizontal crosspiece 8 and the horizontal crosspiece 8 is foldable to fold the horizontal crosspiece 8 when there is an obstacle 36. 3. The fall prevention device for wall surface work according to claim 1, wherein the depth is narrowed by the above. 4. The fall prevention cage 1 has bag-shaped parts 5 and 6 formed at the upper edges of the storage part 9 in the longitudinal direction and the lateral direction, and the bag-shaped parts 5 and 6 are extendable and retractable. 4. The crosspiece 7 and the crosspiece 8 are detachably inserted.
Fall prevention device for wall surface work described.