JPS5826053Y2 - Power sprayer with automatic hose winder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the drive mechanism of a winding device in a power sprayer equipped with a hose winding device.

In a power sprayer equipped with a hose winding device, power is conventionally transmitted from the sprayer drive device to the winding device via a belt tension type clutch mechanism.

However, in a belt tension type clutch mechanism, the transmission belt is always kept in a slipping state with the drive pulley, take-up pulley, and tension pulley during operation of the sprayer drive device, so the belt tension It is easy to cause damage, and when the hose is stretched, the winding device cannot easily rotate in the direction of stretching the hose due to slip resistance between the transmission belt and the winding pulley.

Moreover, in order to reduce the rotational speed of the winding device to a desired safe rotational speed, a so-called two-stage speed reduction is required, which requires an intermediate shaft, which has the drawback of complicating the speed reduction mechanism.

The present invention eliminates the above-mentioned drawbacks of a power sprayer equipped with an automatic hose winding device, and allows the spray hose to be stretched very easily even while the sprayer drive device is in operation.
An automatic hose winding device that does not cause damage to the transmission belt, can easily reduce the rotational speed of the winding device to a desired safe rotational speed with an extremely simple configuration, and also makes it easy to drive the hose winding device. The purpose of this invention is to provide a powered sprayer.

The details will be explained below based on an embodiment of the present invention shown in the drawings.

FIG. 1 is a schematic side view of a power spray device according to the present invention, and FIG. 2 is a schematic front view thereof.

In FIGS. 1 and 2, 1 is a driving engine, 2 is a sprayer main body, 3 is a pressure regulator, 4 is a hose winding device,
These are arranged and fixed as appropriate on a frame 5 constructed by bending a steel pipe.

Reference numeral 6 denotes a drive roller, which is wedged at the tip of a sprayer drive shaft 7 that protrudes to the side of the sprayer main body 2, and has a plurality of protrusions 6a on its outer peripheral surface, as shown in FIG. An outer layer 6C made of urethane rubber or the like is coated and fixed on the outer periphery of a cylindrical collar 6b.

A movable pulley 9 rotatably supported by a support frame 8 is disposed facing the drive roller 6, and the movable pulley 9 is fitted onto the end of the support shaft 4a of the hose winding device 4. A transmission belt 11 is wound between the winding pulley 10 and the winding pulley 10 .

FIG. 4 shows a longitudinal section of the movable pulley 9, in which a support shaft 9b is rotatably supported by a trident-shaped support frame 8 via a bearing 9a, and the drive roller 6 is attached to the outer peripheral surface of the support shaft 9b. A sliding rotation surface 9C that comes into contact with the transmission belt 11 and a fitting groove 9d for the transmission belt 11 are respectively formed.

Base end portion 8 of support frame 8 that rotatably supports movable pulley 9
A shows the connecting rod 15a of the operating lever 15 and the support shaft 12.
The support shaft 12 protruding outward is rotatably supported by a support piece 13 fixed to the frame 5, and the sliding rotation surface 9C of the movable pulley 9 is connected to the outer periphery of the drive roller 6. It is held in a position facing the surface.

Reference numeral 19 denotes a coil spring, which is connected to the movable pulley support frame 8.
The movable pulley 9 is fitted between the bottom plate 8b and the pedestal 5, and its elastic force constantly pushes the movable pulley 9 in the direction of arrow A with the support shaft 12 as a fulcrum.

Further, 15b is a foot type operating lever fixed to the end of the connecting rod, and 15C is a manual operating lever.

Next, the operation of the power sprayer according to the present invention will be explained.

The rotational force of the engine 1 is transmitted to the sprayer drive shaft 7, and by the action of the plunger pump 16, the chemical liquid etc.
, the pressure regulator 3, and the discharge port 18 to the spray hose 4b.

On the other hand, the support frame 8 of the movable pulley 9 is always pressed in the direction of arrow A by the spring 19, and power transmission between the drive roller 6 and the movable pulley 9 is completely cut off.

Therefore, when the operator stretches the spray hose 4b or during the spraying operation, the movable pulley 9 is completely separated from the drive roller 6, and the hose winding device 4 rotates lightly without resistance.

Next, in order to wind up the stretched spray hose 4b, which has become heavy due to the presence of chemical liquid, etc., the foot type operation lever 15a is stepped on, or the manual operation lever 1
5 Press down on C.

By operating the operating lever 15, the spring 19 is compressed via the connecting rod 15a, the movable pulley 9 is deflected in the direction of the arrow and comes into contact with the drive roller 6, and the take-up pulley 10 moves in the direction in which the hose is wound. Rotate to.

In this embodiment, the rotation speed of the sprayer drive shaft 7 is 1000~
700 R, P, M, and this is 100 to 70 R
, P, M, but by appropriately adjusting the pressing force applied to the operating lever 15, the rotational speed of the hose winding device 4 can be arbitrarily selected.

Since the present invention has the above-described configuration, it can exhibit extremely high practical effects.

That is, unlike the tension clutch method, the movable pulley 9 is completely cut off from the drive roller 6 when the hose is stretched, so the spray hose 4b can be stretched extremely smoothly, and the transmission belt 11 is Since it is always stationary, there is almost no damage to the belt.

Further, by appropriately selecting the outer diameters of the drive roller 6 and the movable pulley 9, an arbitrary reduction ratio can be easily set, and by adjusting the pressing force on the movable pulley 9 using the operating lever 15, the winding device can be adjusted. Continuously variable speed is also possible, which significantly improves the convenience of use, and also reduces manufacturing costs by simplifying the speed reduction mechanism.

Furthermore, the foot type operation lever 15b and the manual operation lever 15
C can be easily installed at the front and rear of the machine body, thereby making it extremely easy to operate the hose winding device N4.

As mentioned above, the present invention has extremely high practical value.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a power sprayer according to the present invention, and FIG. 2 is a schematic front view thereof. FIG. 3 is a sectional view of the drive roller, and FIG. 4 is a sectional view of the moving pulley. 5 is a frame, 6 is a drive roller, 7 is a sprayer drive shaft, 8 is a support frame, 9 is a moving pulley, 10 is a winding pulley, 11 is a transmission belt, 15 is an operating lever

Claims (1)

[Scope of utility model registration request] In a power sprayer in which a sprayer driving device winds up and drives a hose winding device placed on a support frame, a drive roller 6 is fitted to one end of a sprayer drive shaft 7, and the drive roller 6 and the take-up pulley 10 facing the transmission belt 1
A movable boot 9 wound with a movable pulley 9 is provided, and a support frame 8 of the movable pulley 9 is rotatably supported on a frame 5, and an operation lever 15 connected to the support frame 8 is used to control the movable pulley 9 during winding. A power sprayer with an automatic hose winding device, characterized in that the movable pulley 9 presses against the drive roller 6 to transmit power.