JPH09135796A - Extension and contraction device and wall surface cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To buffer the force and to prevent the damage to a device even when an impact is applied to a driving side or an obstacle is abutted and to eliminate the danger of an electric shock without using electricity by providing a second cylindrical body capable of reciprocating movement in a state where air is accumulated inside. SOLUTION: The second cylindrical body 22 inserts the side of an opening part 22c to the opening part 21c of a first cylindrical body 21 movably back and forth in the state where the air is accumulated inside. The second cylindrical body 22 is airtightly inserted to the first cylindrical body 21. Since the air is accumulated inside the respective second cylindrical bodies 22 of a connected extension and contraction device 12 in such a manner, even when the impact is applied to brush bodies 46 or the obstacle is abutted, the force is buffered by the air inside the respective second cylindrical bodies 22 and the damage to the device is prevented. Also, since extension and contraction are performed by the pressure of fluid, the electricity is not used and the danger of the electric shock is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expansion / contraction device that can be used as an elevating device or a moving device, and a wall surface cleaning device that can elevate a brush device using the expansion / contraction device.

[0002]

2. Description of the Related Art As a conventional expansion / contraction device, a device in which a piston is reciprocally movable in a cylinder is well known. As a conventional wall surface cleaning device, for example, Japanese Patent Publication No. 4783
There is one disclosed in Japanese Patent Publication No. 57. That is, the guide of the arm that supports the cleaning means is hung with a wire, and the wire is wound or unwound by a reel that is rotated by a motor,
The cleaning means is moved up and down.

[0003]

However, in the conventional expansion / contraction device, the piston moves forward / backward depending on the amount of fluid in the cylinder. Therefore, when the fluid in the cylinder is a substance having a low compressibility, the piston has a fixed position. If the piston does not move and the piston is impacted or hit with an obstacle, the force is directly applied to the piston, which may damage the device. In the conventional wall surface cleaning device, the wire that suspends the cleaning means is rotated by the motor, and thus electricity is required to rotate the motor. Since water is generally used for cleaning the wall surface, the conventional wall surface cleaning device has a problem that there is a risk of electric shock if electricity supplied to the motor leaks.

The present invention has been made by paying attention to such a conventional problem, and even if an impact is applied to the driving side or an obstacle is hit, the force is buffered to prevent the device from being damaged. It is also an object of the present invention to provide a telescopic device that can eliminate the risk of electric shock without using electricity and a wall surface cleaning device using the telescopic device.

[0005]

In order to achieve the above-mentioned object, an expansion / contraction device according to the present invention of claim 1 has a first tubular body having one end closed and an opening at the other end, and one end closed at the other end. A second cylinder having an opening in the second cylinder, and the second cylinder is airtightly inserted into the opening of the first cylinder so that the second cylinder can reciprocate in a state where air is stored therein. The first cylinder or the second cylinder has a fluid inlet / outlet port.

The fluid supplied to the fluid inlet and outlet may be any fluid, but water or air is preferred.

In the telescopic device according to the first aspect of the present invention, by supplying the fluid to the fluid inlet / outlet, the second cylindrical body projects from the first cylindrical body by the internal pressure. Since air is stored inside the second tubular body, even if an impact is applied to the second tubular body or an obstacle is hit, the force of the internal air is buffered to prevent damage to the device. be able to. Even when the fluid to be supplied to the fluid inlet / outlet is air, the air is stored inside the second cylinder, so that compared with the case where air is supplied only into the cylinder like the conventional cylinder and piston, The amount of air can be increased and the cushioning effect can be increased.

By discharging the fluid from the fluid inlet / outlet, the second cylindrical body retracts into the first cylindrical body. The expansion / contraction device can move the second tubular body forward and backward by supplying fluid to the fluid inlet / outlet and discharging it from the fluid inlet / outlet, so that it can be driven without using electricity and eliminate the risk of electric shock. You can

According to another aspect of the present invention, there is provided a connecting and contracting device.
Two expansion / contraction devices according to claim 1 are provided, a plurality of O-rings are provided between each first cylinder and each second cylinder, and oil is sealed in a gap between the O-rings. A connecting body that connects the other ends of the second cylinders, a fluid supply pipe and a fluid discharge pipe connected to both the fluid inlet and outlet, and a valve that opens and closes the fluid supply pipe and the fluid discharge pipe. Is characterized by.

In the connecting and contracting device according to the second aspect of the present invention, the airtightness between the first cylinder and the second cylinder is maintained by the plurality of O-rings and the enclosed oil. Silicon oil is suitable as the oil. Since the first cylinders are connected by the connecting body, even if a biased load is applied to the connecting body, the load is dispersed and the second cylinders move forward and backward stably. The connecting expansion device can change the valve,
Fluid can be simultaneously supplied from the fluid supply pipe to each fluid inlet / outlet, and fluid can be simultaneously discharged from the fluid outlet / inlet to the fluid discharge pipe, and the second cylinders can be simultaneously advanced and retracted to move the connecting body. You can When both the fluid supply pipe and the fluid discharge pipe are closed, each second cylinder can be stopped.

The wall surface cleaning device according to the present invention of claim 3 is
A trolley, a connecting and retracting device according to claim 2, and a brush device; the connecting and retracting device has one end of each first cylinder fixed to an upper portion of the trolley; the brush device includes a support shaft and a bar. , Brush mounting plate, brush shaft, impeller,
A brush body and a fluid discharger, the support shaft protruding outward from the carriage and rotatably attached to the connection body of the connecting and contracting device, and the bar at the tip of the support shaft protruding from the carriage. Vertically fixed, the brush mounting plate is vertically fixed to one end of the bar, the brush shaft is rotatably mounted on the brush mounting plate, and the impeller is fixed around the brush shaft. The brush body is fixed around the tip of the brush shaft with the brush shaft as a center, and the fluid discharger is provided on the brush mounting plate so as to discharge the fluid and contact the impeller to rotate the impeller. That
Features.

In the wall surface cleaning device according to the third aspect of the present invention, the impeller is rotated by applying the fluid with the fluid discharger,
Cleaning can be performed by rotating the brush body via the brush shaft. By rotating the support shaft, the bar rotates around the support shaft, and the brush body can be cleaned toward the floor surface side or the wall surface side.
Since the brush body is attached to the connecting body via the brush shaft, the brush mounting plate, the bar, and the supporting shaft, the brush body moves up and down by moving the second cylinders of the connecting and contracting device forward and backward to raise and lower the connecting body. However, it is possible to clean a stepped place or a wall from a low position to a high position. The wall cleaning device can be moved by a trolley,
You can move around and clean.

In the wall surface cleaning device, even if the brush body is impacted or hit with an obstacle, the force can be buffered by the air inside each second cylinder to prevent the device from being damaged. Since the raising and lowering of the brush body and the rotation of the brush body are performed by the pressure of the fluid, the brush body can be driven without using electricity, and the risk of electric shock can be eliminated.

The wall surface cleaning device according to the present invention of claim 4 is
The wall surface cleaning device according to claim 3, wherein a weight fixed to the other end of the bar and balanced with the brush body side with a fixed portion to the support shaft as a fulcrum, and the support shaft fixed to the rear end of the support shaft. It has a lever for rotating.

In the wall surface cleaning device according to the fourth aspect of the present invention, since the weight which is balanced with the brush body side is fixed to the bar with the fixed portion to the support shaft as a fulcrum, the support shaft can be rotated with a light force. Also, since the lever is fixed to the support shaft, it is easy to orient the brush body toward the floor surface side or the wall surface side.

The wall surface cleaning device according to the present invention of claim 5 is
The wall surface cleaning device according to claim 3 or 4, wherein the carriage has a handle, and the operating portion of the valve is provided on the handle.

In the wall surface cleaning device according to the fifth aspect of the present invention, the carriage can be easily moved by the handle. Further, since the operating portion of the valve is provided in the handle, it is possible to control the valve while moving the carriage to raise and lower the brush body for cleaning.

[0018]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show one embodiment of the present invention. As shown in FIG. 1, the wall surface cleaning device 10
Is a dolly 11, a connecting and retracting device 12, and a brush device 13.
And The dolly 11 has a front portion 11a and a rear portion 11b, and the rear portion 11b is rotatably attached to the front portion 11a. The connecting telescopic device 12 includes two telescopic devices 2.
It has 0 and 20. As shown in FIG. 2, each expansion / contraction device 20 has a first cylinder 21 and a second cylinder 22.
The first tubular body 21 has one end 21a closed and an opening 21c at the other end 21b. The second tubular body 22 also has one end 22a.
Has an opening 22c at the other end 22b.

The second tubular body 22 is inserted into the opening 21c of the first tubular body 21 on the side of the opening 22c so that the second tubular body 22 can reciprocate in a state where air is stored therein. Three O-rings 23, 23, 23 are provided between the first cylinder 21 and each second cylinder 22. Three grooves 22d, 22d, 22d are formed on the outer circumference of the other end 22b of the second tubular body 22, and each O-ring 23 is fitted into each groove 22d and attached to the second tubular body 22. There is. Silicon oil 24 is sealed in the gaps between the O-rings 23, 23, 23, and the second tubular body 22 is hermetically inserted into the first tubular body 21. First cylinder 2
1 has a fluid inlet / outlet 25 on one end 21a side.

As shown in FIG. 1 or FIG. 3, the coupling expansion / contraction device 12 also includes a coupling body 26, a fluid supply pipe 27 and a fluid discharge pipe 28, a first valve 29, and a second valve 30.
And a third valve 31. The connecting body 26 connects the one ends 22a of the respective second cylindrical bodies 22. The fluid supply pipe 27 can be connected to a vinyl hose. Fluid supply pipe 2
7 and the fluid discharge pipe 28 are connected to each fluid inlet / outlet port 25 through the second valve 30 and the confluence pipe 32. The first valve 29 opens and closes the fluid supply pipe 27. The second valve 30 is provided in the confluent pipe 32 and is provided for each fluid port 25.
To connect or disconnect the fluid supply pipe 27 and the fluid discharge pipe 28. The third valve 31 is connected to the fluid discharge pipe 28.
Open and close.

As shown in FIG. 1, the connecting and retracting device 12 includes:
One end 21a of each first tubular body 21 is fixed to the upper portion of the front portion 11a of the truck 11. Fluid supply pipe 27, fluid discharge pipe 2
8, the first valve 29, the second valve 30, and the third valve 31 are also fixed to the upper portion of the carriage 11. Trolley 1
The front portion 11 a of No. 1 has a handle 33. One end of the chain 34 is fixed to the opening / closing lever 29 a of the first valve 29, and the other end of the chain 34 is fixed to the connecting body 26. In the chain 34, the second cylinder 22 is the first cylinder 2
Opening lever 29 when protruding from 1 over a predetermined length
The fluid supply pipe 27 is closed by pulling and operating a. When the second tubular body 22 is retracted by a predetermined length or more, the opening / closing lever 29a returns to open the fluid supply pipe 27.

A spring 35 and an operating wire 36 are attached to the opening / closing lever 30a of the second valve 30, and the opening / closing lever 30a is normally urged by the spring 35 to connect the fluid inlet / outlet 25 and the fluid discharge pipe 28. The connection is made and the fluid supply pipe 27 is closed. The operation wire 36 is connected to an operation portion 37 provided on the handle 33, and by operating the operation portion 37, the fluid supply pipe 27 is opened against the spring 35 and the fluid discharge pipe 28 is closed. .

The opening / closing lever 31a of the third valve 31 includes:
A spring 38 and an operation wire 39 are attached, and normally the opening / closing lever 31a is biased by the spring 38 to close the fluid discharge pipe 28. Operating wire 39
Is connected to the operation unit 40 provided on the handle 33,
By operating the operation unit 40, the fluid discharge pipe 28 is opened against the spring 38.

As shown in FIG. 1 or 4, the brush device 13 includes a support shaft 41, a bar 42, a brush mounting plate 43, brush shafts 44, 44, and an impeller 45,
45, brush bodies 46 and 46, and fluid dischargers 47 and 47
And The support shaft 41 is rotatably attached to the connecting body 26 of the connecting and contracting device 12 by a bearing 48 so as to project outward from the front portion of the carriage 11. The bar 42 is vertically fixed by a mounting tool 49 to the tip of the support shaft 41 protruding from the carriage 11. The brush mounting plate 43 is vertically fixed to one end 42 a of the bar 42. The brush shafts 44, 44 are rotatably attached to both sides of the brush attachment plate 43 with the bar 42 interposed therebetween, penetrating the brush attachment plate 43.

Each impeller 45 is fixed around each brush shaft 44. Each impeller 45
Is a plurality of blades 45a, 4 around the brush shaft 44.
.. are radially provided. The brush body 46 has a nut 50 around the tip of the brush shaft 44.
It is fixed at. The brush body 46 has a brush 46b around the disk 46a. Each impeller 45 is case 5
1 is surrounded by a case 51 and a disk 46.
The fluid that escapes from between a and b is blown out to the brush 46b side. A cover 52 is fixed to the case 51 so as to cover the side of the case 51 opposite to the brush body 46. A cleaning agent supply device 53 is fixed to the cover 52.

Each fluid ejector 47 has a nozzle and a pipe. The nozzle is fixed to the brush mounting plate 43 at a predetermined angle. Each pipe is connected to the merging pipe 54. Connect the confluent pipe 54 to a vinyl hose,
By connecting the vinyl hose to the tap, each fluid discharger 47 discharges water from the nozzle and hits the blades 45a, 45a, ... Of the impeller 45 to rotate the impeller 45.

As shown in FIG. 1, the wall surface cleaning device 10 also has a weight 55 and a lever 56. The weight 55 is fixed to the other end 42b of the bar 42 and balances with the brush bodies 46, 46 side with the fixed portion to the support shaft 41 as a fulcrum. The lever 56 is fixed to the rear end of the support shaft 41 and is used to rotate the support shaft 41. The lever 56 includes brush bodies 46, 4
6 can be fixed at a position facing the floor surface side and a position facing the wall surface side.

Next, the operation will be described. When cleaning by the wall surface cleaning device 10, first, the vinyl hose connected to the water faucet is connected to the merging pipe 54 and the fluid supply pipe 27. The fluid discharger 47 supplies tap water to the blades 45 of the impeller 45.
The impeller 45 is rotated by hitting a, 45a, ... And the brush body 46 is rotated via the brush shaft 44. In this way, cleaning can be performed.

By operating the lever 56 to rotate the support shaft 41, the bar 42 rotates around the support shaft 41, and each brush 41 can be cleaned toward the floor surface or the wall surface. The bar 42 has brush portions 46, 46 with the fixed portion to the support shaft 41 as a fulcrum.
Since the weight 55 that is balanced with the side is fixed, the support shaft 41 can be rotated with a light force. Also,
The support shaft 41 can be easily rotated by the lever 56, and the brush bodies 46, 46 can be easily directed to the floor surface side or the wall surface side. The wall cleaning device 10 is a cart 11
Can be moved, and the place can be moved and cleaned. The dolly 11 can be easily moved by the handle 33.

When the height of the brush device 13 is to be increased, the second valve 30 is operated by the operation portion 37 to connect the respective fluid inlet / outlet ports 25 and the fluid supply pipe 27. Thus,
By supplying tap water to each fluid inlet / outlet port 25 simultaneously from the vinyl hose via the fluid supply pipe 27, the second cylindrical body 2
2 and 22 simultaneously project from the first cylindrical bodies 21 and 21 by the internal pressure, and raise the coupling body 26. When the operation of the operation portion 37 is stopped, the second valve 30 closes the fluid supply pipe 27 by the spring 35, and the connecting body 26 stops rising.

Each brush body 41 includes a brush shaft 44,
Since it is attached to the connecting body 26 via the brush mounting plate 43, the bar 42, and the support shaft 41, the connecting body 2
By raising 6 each brush body 41 rises.
When the connecting body 26 becomes higher than a predetermined height, the chain 34 controls the first valve 29 to close the fluid supply pipe 27, and the connecting and contracting device 12 automatically stops rising.

When lowering the height of the brush device 13, the third valve 31 is operated by the operating portion 40 to open the fluid discharge pipe 28. In this way, by simultaneously discharging water from the respective fluid inlet / outlet ports 25 to the fluid discharge pipe 28, the second cylindrical bodies 22 and 22 are simultaneously retracted into the first cylindrical body 21, and the connecting body 26 is lowered. When the operation of the operation unit 40 is stopped,
The spring 38 causes the third valve 31 to close the fluid discharge pipe 28, and the connecting body 26 stops descending. By lowering the connecting body 26, each brush body 41 is lowered. Thus,
It is possible to clean a stepped place or a wall from a low position to a high position.

The connecting and contracting device 12 supplies the tap water to the fluid inlet / outlet 25 to supply or discharge the tap water to hydraulically press the second tubular body 2.
2, 22 can be moved forward and backward to move the brush device 13 up and down, and since the brush bodies 41, 41 can be rotated by water pressure, they can be driven without using electricity,
You can eliminate the risk of electric shock. In particular, when cleaning a place with a lot of water such as a bathtub, there is a great risk of electric shock if electric power is used. However, the wall surface cleaning device 10 can perform cleaning without using electric power, which is highly safe. . Also,
Since the operating portions 37 and 40 of the valves 30 and 31 are provided on the handle 33, the valve 3 can be moved while moving the carriage 11.
The brush bodies 41, 41 can be moved up and down by controlling 0, 31 for cleaning.

When the second tubular body 22 moves back and forth, the three O-rings 23, 23, 23 and the silicone oil 24 enclosed therein provide an airtight seal between the first tubular body 21 and the second tubular body 22. Sex is maintained. In addition, since the first cylinders 21 are connected by the connecting body 26, even if a biased load is applied to the connecting body 26, the load is dispersed and the respective second cylinders 22 move forward and backward in a stable manner.

Further, in the wall surface cleaning device 10, since the air is stored inside each of the second cylindrical members 22 of the connecting and contracting device 12, the brush members 41, 41 may be impacted or hit by an obstacle. Also, the force can be buffered by the air inside each of the second cylindrical bodies 22 to prevent the device from being damaged.

The expansion / contraction device 20 is composed of the first cylindrical body 21, the second cylindrical body 22, the three O-rings 23, 23, 23, and the silicone oil 24. It's easy. The telescopic device 20 can be used as an elevating device for various devices other than the wall surface cleaning device 10.

In the above embodiment, the fluid supplied to the expansion / contraction device 20 of the connecting expansion / contraction device 12 may be air. Air can be supplied to the telescopic device 20 by a compressor. Even when the fluid to be supplied to the fluid inlet / outlet is air, the air is stored inside the second cylinder, so that compared with the case where air is supplied only into the cylinder like the conventional cylinder and piston, The amount of air can be increased and the cushioning effect can be increased.

In the above embodiment, the O-ring is 3
Although the number of O-rings is shown, the number of O-rings may be two or more, and may be any number. Further, although the example in which the brush shaft, the impeller and the brush body of the brush device are two sets has been shown, these may be one set or three or more sets.

[0039]

According to the telescopic device and the wall surface cleaning device of the present invention, since the air is stored inside the second tubular body, the second tubular body is impacted and the driving side is impacted. Even if an obstacle hits, the force can be buffered to prevent damage to the device, and since the device expands and contracts due to the pressure of the fluid, the danger of electric shock can be eliminated without using electricity.

Particularly, in the connecting and retracting device according to the second aspect of the present invention, the airtightness between the first cylinder and the second cylinder can be maintained, and the forward and backward movement of each second cylinder can be stabilized. You can do it.

Particularly, in the wall surface cleaning device according to the third aspect of the present invention, the brush body can be rotated by the pressure of the fluid for cleaning, and the brush body can be moved up and down by the connecting and expanding device.

Particularly, in the wall surface cleaning device according to the fourth aspect of the present invention, the support shaft can be rotated with a light force, and the brush body can be easily directed to the floor surface side or the wall surface side.

In particular, in the wall surface cleaning device according to the fifth aspect of the present invention, the carriage can be easily moved, and the brush body can be moved up and down while the carriage is being moved to perform cleaning.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a wall surface cleaning device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a telescopic device according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a flow path of a fluid to a connecting and contracting device of a wall surface cleaning device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a main part of a brush device of a wall surface cleaning device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wall-cleaning apparatus 11 Carriage 12 Connection expansion device 13 Brush device 20 Expansion device 21 1st cylinder 22 2nd cylinder 26 Connection body 27 Fluid supply pipe 28 Fluid discharge pipe 29 1st valve 30 2nd valve 31 3rd valve 41 Support shaft 45 Impeller 46 Brush body 47 Fluid ejector 55 Weight 56 Lever

Claims (5)

[Claims] 1. A first cylinder having one end closed and an opening at the other end, and a second cylinder having one end closed and an opening at the other end, wherein the second cylinder has air inside. An expansion / contraction device characterized in that the opening side is airtightly inserted into the opening of the first cylindrical body so as to be able to reciprocate in a stored state, and the first cylindrical body or the second cylindrical body has a fluid inlet / outlet port. 2. The two expansion / contraction devices according to claim 1, wherein a plurality of O-rings are provided between each first cylinder and each second cylinder, and a gap is provided between each O-ring. Is filled with oil and connects the other end of each second cylindrical body, a fluid supply pipe and a fluid discharge pipe connected to both the fluid inlet and outlet, and opens and closes the fluid supply pipe and the fluid discharge pipe. A connecting and retracting device comprising: 3. A dolly, and a connecting and retracting device according to claim 2,
And a brush device, wherein one end of each first tubular body is fixed to an upper portion of the carriage in the connecting and contracting device, the brush device includes a support shaft, a bar, a brush mounting plate, a brush shaft, and an impeller. A brush body and a fluid ejector, the support shaft protruding outward from the carriage and rotatably attached to the connection body of the connecting and contracting device, and the bar protruding from the carriage of the support shaft. Vertically fixed to the tip, the brush mounting plate is vertically fixed to one end of the bar, the brush shaft is rotatably mounted to the brush mounting plate, and the impeller is arranged around the brush shaft as a center. The brush body is fixed around the tip of the brush shaft, and the fluid discharger discharges fluid to the impeller to rotate the impeller. Walls cleaning device that the characterized provided on the brush mounting plate so as to. 4. A weight fixed to the other end of the bar and balanced with the brush body side with a fixed portion to the support shaft as a fulcrum, and a weight fixed to the rear end of the support shaft for rotating the support shaft. The wall surface cleaning device according to claim 3, further comprising a lever. 5. The wall surface cleaning device according to claim 3, wherein the carriage has a handle, and the operating portion of the valve is provided on the handle.