JPS647772B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vacuum cleaner of the suction and drainage type that absorbs cleaning waste water from the floor, and in particular, to preventing the waste water in the tank from flowing into the electric blower side. This invention relates to a suitable suction/discharge type vacuum cleaner.

[Conventional technology]

For example, as disclosed in Japanese Utility Model Application Publication No. 49-83858, a water-absorbing type vacuum cleaner has a float that rises when a certain amount of dirty water accumulates in the water-absorbing tank, stops the suction of the motor blower, and performs the water-absorbing work. It has a structure that ends.

During water absorption, the sewage that is sucked in with the air is separated in the tank, and only the air is sucked into the electric blower through a filter, and then discharged to the outside.

By the way, if moisture mixes with the air and enters the motor section of the electric blower, it causes a decrease in the air insulation of the section. As a countermeasure against this problem, it has been proposed to provide a drain hole in the support plate that supports the lower part of the electric blower, and to introduce the electric blower into the tank through the drain hole. (For example, see Japanese Utility Model Application Publication No. 55-177351.) [Problem to be solved by the invention] In this type of vacuum cleaner, if the sewage in the tank becomes large and ripples when the main body of the vacuum cleaner is moved,
There was a problem in that the float could not respond quickly to changes in the level of sewage water, and as a result, the suction side of the electric blower was insufficiently blocked, making it impossible to completely prevent sewage from entering the electric blower.

SUMMARY OF THE INVENTION An object of the present invention is to provide a suction/drainage type vacuum cleaner that has a wave-dissipating effect on the inside of the tank at the connecting portion between the water suction tank and the main body case.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a water absorption tank, a main body case that is detachably placed on the water absorption tank, a seal packing interposed between the mating surfaces of the main body case and the water absorption tank, and a water absorption tank. A vacuum cleaner comprising an electric blower that sucks water into the vacuum cleaner, wherein the seal packing is sandwiched between a mating surface of the main body case and the water absorption tank;
An annular tongue piece is integrally molded on the inner peripheral portion of the base, extends diagonally downward toward the inside of the tank, and comes into contact with the inner surface of the water absorption tank due to the high pressure inside the water absorption tank during draining. A groove is formed in the base, and an annular corrugation body is fitted into the groove and arranged at a predetermined distance from the tongue piece inside the tank.

[Effect]

Even if the dirty water in the water absorption tank rises up along the inner surface of the tank as the main body of the vacuum cleaner moves, it is suppressed by the tongue piece of the seal packing and the waving body placed on the inner periphery of the upper part of the tank. and was bounced back towards the bottom of the tank. In this process, the waves are dissipated, so the ripples on the sewage surface located inside the tank from the wave holder are kept small and do not flow into the electric blower side.

〔Example〕 Examples of the present invention will be described below.

The main body of the vacuum cleaner consists of a main body case 1 and a water absorption tank 2, as shown in FIGS. 1 to 3. The main body case 1 is securely attached to the water absorption tank 2 by interposing a seal packing 20 and applying a clamp 3.

The seal packing 20 is sandwiched between the outer flange 1a provided on the blower support plate 8 on the main body case 2 side and the outer flange 2a of the water absorption tank 2,
It is kept airtight.

The water absorption tank 2 is provided with a caster 4 at its lower part and an intake/outlet port 5 at its side.

A current transformation section 10 is provided inside the water absorption tank 2 facing the intake/discharge port 5. The current transformation section 10 is mainly composed of a rubber current transformation plate 11 and a current transformation plate support frame 12.

A window 14 is provided in the front wall portion 13 of the current variable plate support frame 12.

The current variable plate support frame 12 extends to near the bottom of the water absorption tank 2, and has an opening 15 at the bottom.

During water absorption, the current plate 11 is moved by water pressure and wind pressure.
Since the window 14 is opened and bent as shown by the broken line in FIG. 1, there is no reduction in the water flow slowing effect and bubble breaking effect. During drainage, the current transformation plate 11 is joined to the front wall 12 of the current transformation support frame 12 to close the window 14 (solid line in Figure 1). Therefore, the water in the water absorption tank 2 is drained through the opening 17 of the current variable plate support frame 12.

The main body case 1 houses an electric blower 30 and a valve device 40, and the electric blower 30 is composed of an electric motor 32 and a blower 33 surrounded by a rubber cover 31. In addition, 6,7
41 is a handle, and 41 is an operating rod of the valve device 40.

The blower support plate 8 is fixed to the main body case 1, and an intake frame 50 and a float support frame 60 are provided at the bottom of the blower support plate 8.
is provided.

The intake frame 50 is attached to match the intake hole formed in the center of the blower support plate 8.
The float support frame 60 is arranged substantially concentrically so as to surround the intake frame 50 and is attached to the blower support plate 8.

Large-diameter cylindrical portion 6 constituting the float support frame 60
1, small-diameter float support cylinders 62 are arranged concentrically at predetermined intervals. Cylindrical part 61
is the partition plate 6 that supports the float support tube 62
3 into an upper intake chamber 64 and a lower float protection section 65. At the top of the cylindrical part 61,
A communication port 66 communicating with the intake chamber 44 is formed, and a filter 70 is installed so as to cover this communication port 66.
is installed. A plurality of ribs 67 are formed radially on the outer periphery of the cylindrical portion 61, and one or more slits 68 are formed below the partition plate 63.

A float 80 is fitted into the float support tube 62 so as to be movable up and down, and is raised by high-pressure airflow when the tank reaches a predetermined water level or when draining water to close the opening 51 of the intake frame 50.

A seal packing 20 is interposed at the joint between the main body case 1 and the water absorption tank 2. This seal packing 20 has a base 21 as shown in FIG.
It consists of a tank side tongue part 22 and a main body case side tongue piece 23, and has an annular shape.

As shown in FIG. 3, the tongues 22 and 23 extend diagonally outward from the inner peripheral portion 21a of the base 21 toward the inside of the base 21. As shown in FIG. The angle of inclination of both tongues with respect to the base is 25° for the tongue 22 and 60° for the tongue 23 with respect to a line A that is perpendicular to the cutting plane P of the base 22 shown in FIG. It is set to ゜.

The seal packing 20 is made of rubber having a shore hardness of 50. The thickness of the base 21 is 12.5 mm, the thickness of the tongue 22 is 1 mm at the tip, and the thickness of the tongue 23 is also 1 mm at the tip.

If the inner diameter of the water absorption tank 2 is 400mm, the tongue piece 22
Regarding the deflection, it is desirable that the distance T ₁ (Fig. 3) between the lower tip of the tongue and the inner peripheral surface of the water absorption tank 2 be 5 mm.

This is because when water is absorbed, it functions as a wave holder, and when water is drained, it easily bends. If the distance is 5 mm or more, it may not bend even if the pressure inside the water absorption tank 2 increases.

A groove 24 that opens toward the inner circumference is formed in the base 21, and an escape recess 25 is formed on the inner surface of this groove.
a, 25b, 25c, and 25d are provided.

Note that the escape recess 25a of the seal packing 20
25d is for preventing fatigue of the seal packing 20 itself.

An annular wave presser body 26 is inserted into and supported by the groove 24, and this wave presser body is arranged at a predetermined distance from the tongue piece 22 inside the tank.

Further, the corrugating body 26 includes an inclined portion 27 that is substantially parallel to the normal shape of the tongue piece 22 (the state shown in FIG. 3).

Next, we will discuss the operation.

(Water Suction Operation) When the electric blower 30 is operated with the valve device 40 set to the water suction operation side, sewage flows through the hose and flows into the water suction tank 2 from the suction/outlet port 5 along with air.

After being separated into gas and liquid in the water absorption tank, the air passes through the filter 70 and passes through the float support frame 60.
into the intake chamber 64 of the air. From here, the air passes through the opening 51 of the intake frame 50 and is sucked into the blower 33 . Blower 33
The air discharged from the main body case 1 passes through the valve device 40 and is discharged from the exhaust port 9 to the outside of the main body case 1 .

When the water level in the water absorption tank 2 reaches a predetermined value, the float 80 floats to the dotted line position in FIG.
opening 51 is closed. As a result, the suction force within the water absorption tank 2 disappears and water absorption stops, so overflow does not occur.

In water absorption operation, the seal packing 20
As shown in Fig. 3, due to the negative pressure inside the water absorption tank, pressing forces Pc and Pc' are applied to the base 21 at the joint between the main body case 1 and the water absorption tank 2 due to the pressure difference (Pa - Pt) between the inside and outside of the tank. The sealing of the seam is further enhanced. In addition, the tongue pieces 22 and 23 inside the tank
The normal state (Fig. 4) is maintained without any external force being applied due to the pressure difference between the front and back sides of the tongue. Therefore, even if waves generated by vibration on the water surface in the tank rise up to the seal packing portion, the tongue pieces are moved to follow these waves. As a result, the tongue pieces are brought into contact with the inner surface of the tank by the force of the waves hitting the base, sealing this area, so that dirty water does not leak out from the seam.

(Drain operation) When the electric blower 30 is operated with the valve device 40 set to the drain operation side, outside air is discharged from the exhaust port 9.
The air is taken into the main body case and flows to the intake frame 50 through the valve device. From here, the high-pressure airflow sucked into the blower 33 and pressurized flows into the intake chamber 64 again via the valve device. This high-pressure airflow pushes the float 80 up to the dotted line position in Figure 1, regardless of the amount of water stored in the water suction tank, that is, regardless of the floating position of the float relative to the amount of water stored, and closes the opening 51 of the intake frame 50 to prevent the high-pressure airflow. The air is prevented from flowing into the blower 33. The high-pressure airflow then passes through the filter 70 and is discharged into the water absorption tank 2.
The water in the water absorption tank 2 is pushed downward by this high-pressure airflow, so it rises upward through the opening 15 of the current converter 10 and is drained to the outside via the hose connection stand 5.

During drainage operation, when the pressure inside the water suction tank 2 increases, the tongue pieces 22 and 23 are bent toward the outer circumference due to the pressure. Then, both tongue pieces are deformed by receiving an external force in the direction of the arrow shown in FIG. A reliable seal is achieved.

This seal further increases as the pressure inside the water absorption tank 2 increases, so that leakage of dirty water does not occur from the joint between the water absorption tank 2 and the main body case 1.

In particular, water absorption tank 1 may be damaged due to movement of the vacuum cleaner.
Even if the water rises along the inner peripheral surface of the water absorption tank 1 when the water inside is moved from side to side, the water is bounced downward by the tongue piece 22 and the sloped part 27 of the wave holder, so that the water is is transmitted along the lower surface of the blower support plate 8 and does not pass through the filter 70 and enter the electric blower 30 side.

According to this embodiment, since the tongue piece 23 that is in close contact with the inner surface of the main body case is integrally formed on the inner peripheral side of the packing 20, the base 21 is also sealed on the main body case side when draining water, so that the main body case and the tongue piece 23 are integrally formed. The sealing effect with the water absorption tank is further enhanced, and leakage of wastewater to the outside can be reliably prevented.

〔Effect of the invention〕

As described above, according to the present invention, the corrugated body and the tongue piece are arranged at a predetermined distance from the inner surfaces of the main body case and the water absorption tank, and extend diagonally downward, so that the base of the seal packing is It is less susceptible to the effects of waves, the sealing performance does not deteriorate, and sewage does not leak outside.

In addition, since the tongue piece and the wave holder are arranged at a predetermined interval, even if a large wave hits, the wave energy is absorbed and dissipated between the two members and the inner surface of the tank, so it is not transferred to the electric blower side. This prevents the infiltration of sewage and prevents deterioration of electrical insulation.

Furthermore, since the wave presser body is installed by inserting it into the annular groove provided in the seal packing,
By integrating the seal packing and the corrugating body, the support structure is simplified and the handling during maintenance and inspection is improved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of the overall structure of a suction/drainage type vacuum cleaner showing an embodiment of the present invention, Fig. 2 is a perspective view of the suction/drainage type vacuum cleaner, and Fig. 3 is a suction/drainage type vacuum cleaner of the present invention. FIG. 4 is a vertical cross-sectional view of the seal packing, and FIG. 5 is a vertical cross-sectional view showing the state of the seal packing during drainage. 1...Body case, 2...Water absorption tank, 20...
... Seal patch king, 8, 9... Tongue piece, 30...
Electric blower, 40...valve device.

Claims (1)

[Claims] 1. A water absorption tank, a main body case detachably placed on the water absorption tank, a seal packing interposed between the mating surfaces of the main body case and the water absorption tank, and a system for sucking water into the water absorption tank. In a vacuum cleaner comprising an electric blower, the seal packing is formed integrally with an annular base that is held between the mating surfaces of the main body case and the water absorption tank, and an inner circumferential portion of the base, and the seal packing is formed integrally with the inner circumferential portion of the base, It once had an annular tongue that extended diagonally downward and came into contact with the inner surface of the water absorption tank due to the high pressure inside the water absorption tank during drainage, a groove was formed in the base, the tongue piece was fitted into the groove, and the tongue piece was fitted into the groove. A suction/drainage type vacuum cleaner characterized in that an annular corrugated body is arranged at a predetermined interval inside a tank with respect to the tongue piece. 2. The suction/drainage type vacuum cleaner according to claim 1, wherein the wave presser body has an inclined portion that is substantially parallel to the normal shape of the tongue.