JPH0224529B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a suction tool equipped with a turbine rotated by the suction air of a vacuum cleaner and a rotating brush using the turbine as a driving source, and the present invention aims to improve operability. This prevents the turbine and rotating brushes from rotating at abnormally high speeds during no-load conditions.

With conventional seed suction tools, when lifted from the surface to be cleaned, that is, when the load on the rotating brush is virtually zero, the turbine and rotating brush rotate at abnormally high speeds, producing noise. There were also problems such as a significant deterioration in the life of the rotating parts.

The present invention eliminates these conventional drawbacks, and embodiments thereof will be described below with reference to the accompanying drawings.

In the figure, a suction device main body 1 is obtained by combining upper and lower main body members 3 and 4 via a bumper 2, and in the front interior thereof there is a suction chamber 6 with a lower opening as a suction port 5. Turbine chambers 7 are respectively formed inside the rear. The turbine chamber 7 is separated from the suction chamber 6 by a partition wall 8, and the rear portion having an opening 9 is set in an arc shape. Reference numeral 10 denotes a rotating brush provided in parallel to the suction chamber 6, with a part of brush bristles 11 planted on the peripheral surface protruding to the outside through the suction port 5; 12, the suction chamber 6;
Bearings 13 of the rotating brush 10 provided on both side chamber walls of the
is a fixed brush installed parallel to the rear of the suction port 5,
Reference numerals 14 and 15 denote wheels provided at the front and rear of the suction tool main body 1 in order to position the suction port 5 at a constant distance from the surface to be cleaned. Reference numeral 16 denotes a substantially semi-cylindrical suction joint which rotatably slides on the rear inner surface of the turbine chamber 7, and a connection port 17 is formed from a part of its peripheral wall. More specifically, in the suction joint 16, a shaft 18 and a hollow shaft 19 projecting outward from the side wall thereof are supported by the walls of both sides of the turbine chamber 7. The suction joint 16 rotates while closing the rear opening 9 of the turbine chamber 7, and along with this, the suction joint 16 rotates while closing the rear opening 9 of the turbine chamber 7.
7 is a device that is vertically displaced within the opening 9. Reference numeral 20 indicates a connecting tube rotatably attached to the connecting port 17 via a ring 21, and an extension tube (not shown) connected to the suction side of the vacuum cleaner via a hose is detachably connected thereto. It is something that will be done.

A turbine 22 is provided in the turbine chamber 7 and has a part of its outer periphery surrounded by the suction joint 16. A shaft body 23 extends from one side of the turbine through the hollow shaft 19 of the suction joint 16 to the outside of the turbine chamber. It is integrally protruded. 24 is a shaft body 2 fixed to the suction tool main body 1
Bearing 3 and 25 are power transmission belts stretched between a small pulley 26 provided at the tip of the shaft body 23 and a large pulley 27 provided on the rotating brush 10.

That is, the rotation of the turbine 22 is transmitted to the rotating brush 10 at a reduced speed.

Further, the turbine 22 is provided offset to one side of the turbine chamber 7 (left side in FIG. 1). 28, 29
are two vent holes formed in the partition wall 8, one vent 28 facing the lower half of the turbine 22, and the other vent 29 not facing the turbine 22 and directly facing the lower half of the turbine 22. Connection port 17 of suction joint 16
It is opposed to. 30 is spring 3
The switching lever is biased in one direction by 1,
An opening 33 that selectively communicates with either one of the ventilation holes 28 and 29 is formed in the shielding plate 32 that partially protrudes from the shielding plate 32 . 34 is a knob of the switching lever 30, and 35 is a protrusion 3 formed on the switching lever 30.
6, the spring 3 of the switching lever 30
This is a leaf spring that maintains an operating state against the pressure of 1.

Note that the rotation range of the suction joint 16 with respect to the suction device main body 1 is determined by the respective formed stoppers 37 and 38.
It is regulated by the interval between.

Now, 39 is a bypass air passage formed on the upper wall of the turbine chamber 7, which is normally closed by the suction joint 16, but the suction device main body 1 is rotated in the direction of depression angle to the maximum extent with respect to the suction joint 16. It is designed to be open when the building is open.

In the above configuration, if the switching lever 30 is now slid to the left in FIG.
The suction air that has flowed from the suction chamber 6 to the vent 28 collides with the turbine 22, and then flows from the connection port 17 of the suction joint 16 to the connection tube 20 to the extension pipe to the hose to reach the vacuum cleaner.

Therefore, the turbine 22 rotates, and its rotational force is transmitted to the rotating brush 10 after deceleration.

Furthermore, when the opening 33 of the shielding plate 32 is communicated with the other vent 29 via the switching lever 30, the suction air flows through the turbine chamber 7 and reaches the suction joint 16 regardless of the turbine 22.
The turbine 22 and the rotating brush 10 do not rotate.

During cleaning work, the suction tool body 1 is attached to the suction joint 16.
Since it is movable up and down, that is, it can be lifted up and down, the suction port 5 of the suction tool main body 1 faces the surface to be cleaned, ensuring dust suction regardless of the worker's posture. .

By the way, when the suction main body 1 is separated from the surface to be cleaned while the turbine 22 is rotating, the suction tool main body 1 rotates to the maximum angle of depression with respect to the suction joint 16 due to its own weight. However, the bypass air passage 39 is opened here, and the bypass air flowing in from this applies a rotational torque opposite to that of the regular suction air to the turbine 22, rapidly reducing the rotation of the turbine 22. It is.

Therefore, when the load applied to the rotating brush 10 is substantially zero, the rotational speed of the rotating brush 10 and the turbine 22 is automatically reduced, so no noise is generated, and wear of the bearings etc. is minimized. It is something that can be controlled.

In the above embodiment, the bypass air passage is directly opened and closed by the suction joint, but another opening and closing means that responds to the suction joint may be provided to open and close the bypass air passage.

As described above, the present invention connects a suction device main body, which has a built-in turbine rotated by suction air and a rotating brush that interlocks with the turbine, to a suction joint having a connection port to the vacuum cleaner side, so as to be able to move up and down. The main body of the suction device is formed with a brake air passage that opens when the displacement in the depression angle direction reaches a certain value and introduces air from a different system to the suction air, and the air that flows in through the brake air passage. is characterized in that it is set to apply a rotational torque opposite to that of the suction air to the rotating brush, so when the suction device is moved away from the surface to be cleaned, in other words, the load on the rotating brush is substantially reduced. When the value becomes zero, a braking force is applied and the rotation of the turbine and rotating brushes is rapidly reduced. Therefore, it is possible to reduce noise, suppress wear of the bearing portion, etc., and improve life characteristics. Furthermore, by providing the suction joint, the main body of the suction tool can reliably face the surface to be cleaned, so that a good dust suction operation can be performed at any time.

[Brief explanation of drawings]

FIG. 1 is a plan view of a suction device according to an embodiment of the present invention with the upper main body member removed, FIG. 2 is a sectional view, and FIG. 3 is a perspective view of a suction joint. DESCRIPTION OF SYMBOLS 1... Suction tool main body, 7... Turbine chamber, 10... Rotating brush, 16... Suction joint, 17... Connection port, 22...
Turbine, 39... bypass air path.

Claims (1)

[Claims] 1. A suction tool body having a built-in turbine rotated by suction air and a rotating brush that interlocks with the turbine is connected to a suction joint having a connection port to the vacuum cleaner side, and the suction tool main body has a , when the displacement in the depression angle direction reaches a certain value, a brake air passage is formed that opens to introduce air from a different system to the above-mentioned intake air, and the flow direction of the air flowing in through this brake air passage and the intake air is A suction tool for a vacuum cleaner, characterized in that the points of action on the turbine are set on opposite sides with their centers in the same direction.