JPH0634767Y2 - Vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a vacuum cleaner.

Conventional technology In addition to cleaning the floor surface, the Bakuium cleaner can suck liquid such as water together with dust to enable it to be used on tennis courts and golf courses with accumulated water. On the other hand, there is one that has a high dust collecting ability by rotating a Baki Yum Juan at a high speed. However, since the conventional vacuum cleaner of this kind works by rotating the fan at a high speed, it emits a considerably large amount of noise to the outside, which causes discomfort to the worker and lowers the work efficiency.
In order to withstand high negative pressure due to the fan, thick steel plates have to be used for the canopy of the dust collection tank, and the prime mover cannot be changed.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to eliminate such disadvantages of the conventional techniques and to provide a vacuum cleaner which has a simple structure and is convenient to use.

Means for Solving the Problems That is, the vacuum cleaner according to the present invention includes a fan that operates so as to maintain a negative pressure in the dust collecting tank that sucks and collects dust and liquid together. An upper cover that is fixed to the lower side of the fan and defines an inner chamber parallel to the upper side of the canopy portion so that the relative position of the upper cover can be varied along the upper side of the canopy portion to open the exhaust air of the fan to the inner chamber. An air outlet is provided in the canopy portion, an engine is attached to the upper surface of the upper cover, an endless belt is hung between the fan and the fan in the inner chamber, and an air outlet is formed in a peripheral portion of the upper cover. Characterized by the configuration.

Therefore, the air exhausted from the air exhaust port of the fan flows into the inner chamber of the upper cover, where it is silenced and is discharged to the outside from the air exhaust hole.

In addition, the upper cover with a variable mounting position reinforces the canopy to facilitate replacement and adjustment of the prime mover.

Embodiment Next, the present invention will be described based on an embodiment of the drawings.

In the illustrated vacuum cleaner of the embodiment, as shown in FIG. 1, a drum canister-shaped dust collecting tank 2 is attached to a carriage 1, and the carriage 1 is provided with wheels 3 on the left and right of its rear portion. A caster 4 is provided at the center of the part so that it can travel on a surface 5 such as a floor or the ground. A handle 6 is provided above the rear part of the dust collecting tank 2 so that an operator can grip and operate the machine body. A dust collecting hose 7 is attached to the front upper portion of the dust collecting tank 2, and a nozzle (not shown) at the tip of the dust collecting hose 7 is brought close to the surface 5 to collect liquids such as dust and water together. It is supposed to inhale.

A high-speed centrifugal multi-stage fan 9 is mounted as a vacuum fan inside the canopy portion 8 made of a thin steel plate or the like of the dust collecting tank 2. The central portion of the canopy portion 8 of the dust collecting tank 2 is covered with an upper cover 10, and the upper cover 10 is
As shown in FIG. 2, a plurality of slots 11 formed in the base thereof
Are fixed to the canopy portion 8 by a plurality of bolts 12 which are threadedly attached to the canopy portion 8 of the dust collecting tank 2 so that the relative position of the canopy portion 8 can be changed. . Each slot 11 is formed to be long in the front-back direction of the upper cover 10, that is, in the left-right direction when viewed in FIG. 2, and further, a screw rod 13 extending forward from the front portion of the upper cover 10 is By means of nuts 15 and 16 which penetrate a bracket 14 fixed to the front end of the canopy portion 8 of the dust collecting tank 2 and are screwed to the screw rod 13 on both sides of the bracket 14, the upper cover 10 is provided with the slot 11 It is fixed so that the mounting position can be adjusted along the direction. A two-cycle internal combustion engine 18 as a prime mover is attached to a portion of the upper cover 10 near the rear of the upper surface 17. On the other hand, Juan 9
The rotary shaft 19 projects upward into the inner chamber 20 in the upper cover 10, and a small pulley 42 is fixed to the upper end of the rotary shaft 19.
Similarly, a large pulley 41 is attached to the lower end of an output shaft 21 connected to a crankshaft (not shown) of the engine 18 protruding downward into the inner chamber 20 of the upper cover 10 through a suitable coupling 40. An endless belt 22 is stretched between the fan 9 and the small pulley 42 of the rotary shaft 19 of the fan 9, so that the fan 9 is driven by the engine 18 at an increased speed. To adjust the tension of the belt 22, the fixing bolt 12 is loosened, the nuts 15 and 16 screwed to the screw rod 13 are rotated with respect to the bracket 14, and the upper cover 10 is attached to the dust collecting tank 2. This is performed by moving the canopy portion 8 to the left and right.

A cage-shaped screen 23 is provided in the center of the dust collecting tank 2, and the screen 23 has a function of previously removing the dust sucked into the dust collecting tank 2 and a valve guide. 24 is supported inside. The valve guide 24
Guides the spherical float valve 26 which automatically closes the intake port 27 of the fan 9 when the liquid is excessively accumulated in the dust collecting tank 2. An air outlet 28 from the fan 9 is open into the inner chamber 20 of the upper cover 10. Also, the upper cover
Around 10 is formed an air exhaust hole 29 having a size such that a plurality of fingers, which are spaced apart from each other in the circumferential direction, do not allow fingers to enter. Further, the upper cover 10 has a front portion 30 of its upper surface 17 formed in a mountain-shaped cross-sectional shape protruding upward, and the upper cover of that portion is formed.
The internal chamber 20 of 10 is enlarged upward to form an additional space 31.

The additional space 31 is used as a storage space for the control switch 44 and the like, and also functions as a resonance chamber, and the outer side surface 43 is used as a control panel.

Further, an electromagnetic switch 32 supported by a support rod 37 is provided in the screen 23. The electromagnetic switch 32 is
A tubular main body 33, a lead switch 34 provided in the main body 33, a cup-shaped float 35 attached to the periphery of the main body 33 so as to be vertically movable, and a bottom portion of the float 35. When the float 35 rises because the amount of liquid stored in the dust collection tank 2 exceeds the allowable amount, the magnet 36 closes the reed switch 34 by the action of its magnetic force. The primary current of the ignition circuit of the engine 18 to ground, the engine 18 is automatically stopped, and the spherical float valve
Working together with 26, it prevents the danger of excessive storage of liquid and activates lamps and alarm buzzers.

When the fan 9 is driven by the engine 18, the air in the dust collection tank 2 is sucked from the intake port 27 and discharged from the exhaust port 28 to the internal chamber 20 and the additional space 31 in the upper cover 10. The generated air is further discharged from the internal chamber 20 and the resonance chamber 31 to the outside through the exhaust hole 29, and the internal space of the dust collection tank 2
Maintain 25 under vacuum. At this time, the additional space 31 resonates with the noise generated from the air flowing in the upper cover 10 to mute the noise, and significantly reduces the noise generated during the operation of the fan. If you clean the surface 5 with the dust collecting hose 7 in this state,
The dust and liquid on the surface 5 are sucked into the internal space 25 of the dust collecting tank 2, and only the air is discharged to the outside from the air exhaust hole 29 by the fan 9 as described above. When the liquid is further sucked into the dust collecting tank 2 and the liquid level exceeds a predetermined value,
The electromagnetic switch 32 and the spherical float valve 26 are activated to prevent an accident.

When the prime mover 18 is replaced with, for example, an electric motor, the sizes of the large pulley 41 and the endless belt 22 are changed.

Effects of the Invention With the configuration of the present invention described above, the present invention can significantly reduce the noise of the air flow discharged from the fan at a high flow rate, facilitate the replacement of the prime mover, and have a high dust collection capacity. Therefore, it is possible to provide a vacuum cleaner that can perform cleaning work on a tennis court, a golf course, or the like having pooled water other than the floor surface without causing any discomfort to the operator.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of a vacuum cleaner according to the present invention, and FIG. 2 is a plan view of the embodiment of FIG. 2 ... Dust collection tank, 8 ... Canopy part, 9 ... Juan, 10
…… Upper cover, 18 …… Motor, 20 …… Inside chamber of the upper cover, 22 …… Endless belt, 28 …… Huan exhaust port, 29…
… Exhaust holes.

Claims (1)

[Scope of utility model registration request] 1. A fan (9), which operates so as to maintain a negative pressure in a dust collection tank (2) for sucking and collecting dust and liquid together, is provided below a canopy portion (8) of the dust collection tank. An upper cover (10) which is fixed and defines an inner chamber (20) parallel to the upper side of the canopy portion is attached along the upper side of the canopy portion so that the relative position of the fan can be varied, and the exhaust air from the fan can flow into the inner chamber. An air outlet (28) is provided in the canopy portion so as to open, and a prime mover (18) is attached to an upper surface (17) of the upper cover, and an endless belt (2) is provided between the fan and the fan in the inner chamber.
2), and place the ventilation holes (2
9) A vacuum cleaner characterized by being formed.