JPS638777B2 - - 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 suction tools of this type, when lifted above 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 problems such as the life of the rotating parts being significantly shortened.

The present invention solves these conventional drawbacks, namely, a suction joint having a connection port to the vacuum cleaner side has a built-in turbine rotated by suction air and a rotating brush interlocked with the turbine. The main body of the suction tool is connected to the suction tool main body so as to be able to move up and down, and the suction tool main body is provided with a bypass air passage for introducing air that is opened when the displacement in the direction of depression reaches a certain value and bypasses the turbine. Therefore, when the suction tool is moved away from the surface to be cleaned, the main body of the suction tool rotates in the depression angle direction with respect to the suction joint due to its own weight, opening the bypass air passage, allowing some air to bypass the turbine. flows to Therefore, the amount of air flowing into the turbine is reduced accordingly, and abnormally high speed rotation of the turbine is prevented even in a low load state.

Examples thereof will be described below with reference to the accompanying drawings.
In Figs. 1 to 3, the suction device main body 1 is a bumper 2.
It is obtained by joining the upper and lower body members 3 and 4 via a suction chamber 6 with a lower opening as a suction port 5 in its front interior, and a turbine chamber 7 in its rear interior.
are formed respectively. 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. 1
Reference numeral 0 denotes a rotating brush which is provided in parallel to the suction chamber 6 and has brush bristles 11 planted on the circumferential surface of the brush that partially protrude outside through the suction port 5; A bearing for a rotating brush 10 provided on the chamber wall, 13 a fixed brush attached parallel to the rear of the suction port 5, and 14 and 15 a suction tool body to position the suction port 5 at a constant distance from the surface to be cleaned. These are wheels installed before and after 1. 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, the suction joint 16 has a shaft 18 and a hollow shaft 19 protruding outward from its side wall.
are pivotally supported on both side walls of the turbine chamber 7.
This suction joint 16 rotates while closing the rear opening 9 of the turbine chamber 7, and along with this,
The connection port 17 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 ventilation holes formed in the partition wall 8, one of which is the ventilation hole 28 facing the lower half of the turbine 22;
The other vent port 29 does not face the turbine 22 and directly faces the connection port 17 of the suction joint 16 . Reference numeral 30 denotes a switching lever biased in one direction by a spring 31, and a shielding plate 32 protruding from a part thereof has the above-mentioned ventilation hole 2.
An opening 33 is formed which selectively communicates with either one of the openings 8 and 29. 34 is a knob of the switching lever 30, and 35 is a protrusion 36 formed on the switching lever 30.
The spring 31 of the switching lever 30
It is a leaf spring that maintains the operating state against the

Note that the rotation range of the suction joint 16 with respect to the suction device main body 1 is limited by the stopper 37 formed by the
38 intervals.

Now, 39 is a bypass air passage formed in the side wall of the turbine chamber 7, which is normally closed by the side wall of the suction joint 16, but the suction device main body 1 can rotate in the direction of depression angle to the maximum extent with respect to the suction joint 16. When this occurs, the opening 40 formed in the side wall of the suction joint 16 is opened.

In the above configuration, if the switching lever 30 is now slid to the right 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 air 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 blocking 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 tool 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 now opened in line with the opening 40 and air bypassing the turbine 22 is introduced.

Assuming that the suction air flow rate of the vacuum cleaner is constant, the ventilation port 28 will be opened by the amount of bypass air introduced.
The amount of suction air that reaches the turbine 22 via the turbine 22 is reduced, and therefore, even if the load on the turbine 22 is reduced, its rotational speed is reduced.

Therefore, even when the load applied to the rotating brush 10 is substantially zero, the rotating brush 10 and the turbine 22 do not rotate at abnormally high speeds, so no noise is generated, and wear of the bearings, etc. is minimized. It is something that can be done. However, since the overall air flow is constant, the vacuum cleaner is not overloaded.

In each of the above embodiments, 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.

In this way, 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.
Moreover, the suction tool body is characterized by being provided with a bypass air passage for introducing air that opens when the displacement in the depression angle direction reaches a certain value and bypasses the turbine. Even when the rotating brush is moved away from the cleaning surface, that is, when the load on the rotating brush becomes substantially zero, the turbine and the rotating brush do not rotate at an abnormally high speed. Therefore, the noise can be reduced,
Furthermore, it is possible to suppress the wear of the bearing parts and improve the life characteristics. Furthermore, since turbine rotation control does not directly adjust the suction air volume, but changes the suction air volume in relation to the bypass air volume, the air flow rate to the vacuum cleaner remains at the set value. , the load will not become large.

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 the drawing]

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. 1... Suction tool 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 A suction tool for a vacuum cleaner, characterized in that it is provided with a bypass air passage for introducing air that opens when the displacement in the depression angle direction reaches a certain value and bypasses the turbine.