JPH06238094A - Washing spinning machine - Google Patents

Abstract

PURPOSE:To provide a washing spinning machine capable of smoothly operating a check valve and easily attaching and detaching the check valve. CONSTITUTION:Since, in a check valve 21, a valve plate 23 is held by a mounting frame 22 in such a manner as to be openable and closable, and the mounting frame 22 is attachably and detachably mounted on a drain hole part 16 from the inside of a spinning tank 11, the check valve 21 is attachably and detachably installed to the inside of the drain hole part 16 separately from a drain pipe 18 being fitted to the outside of the drain hole part 16 and fixed by an adhesive. Therefore, even if the adhesive at fixing the drain pipe 18 is protruded from the adhering part, the state as adhering the valve plate 23 of the check valve 21 to the valve seat of the mounting frame 22 is never caused, and the check valve 21 conducts smooth opening operation and counterflow arresting operation. When the replacement of the check valve 21 is required, only the check valve 21 is easily removed by removing the mounting frame 22 from the drain hole part 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing / dehydrating machine having a washing function and a dehydrating function, such as a two-tub type washing machine.

[0002]

2. Description of the Related Art As is well known, for example, in a two-tub type washing machine, the laundry that has been washed in the washing tub is transferred to a dewatering basket rotatably housed in the dewatering tub for dewatering. The water discharged in this dehydration process is discharged from the dehydration tank to the outside through a drain pipe connected to the drain port. The drain port is equipped with a check valve so that the drainage of the laundry from the washing tub does not flow back into the dehydration tub through the drain pipe.

The main part of a conventional two-tub type washing machine having a check valve at the drain port will be described below with reference to FIGS. 4 and 5. FIG. 4 is a sectional view of a main part, and FIG.
It is a top view of the arrow view. In FIG. 1, reference numeral 1 denotes a dehydrating tub which is housed in the main body of the washing machine and is formed of a synthetic resin material. Inside the dehydrating tub 1, a dehydrating basket 2 is rotatably accommodated.

Reference numeral 3 denotes a drainage port portion having an opening provided by bulging the bottom of the dehydration tank 1 to the outside. The drainage port portion 3 is provided with a check valve 4, and further the drainage port portion. A drain pipe 5 made of a synthetic resin material is fitted to the outer side of the bulge portion 3 and is water-tightly fixed by adhesion or the like.

The check valve 4 has a valve seat 6 on the outer surface of the bulging portion of the dehydration tank 1, and a rubber valve plate 8 is attached to and held by a protrusion 7 formed integrally with the valve seat 6, and drainage is performed. When the pipe 5 is fixed, the two stoppers 9 protruding inward from the inner surface of the drain pipe 5 are configured to press the mounting portion of the valve plate 8.
As shown by the arrow B, the opening operation is performed only in the draining direction from the dehydration tank 1 to the drainage pipe 5.

Then, put laundry in the dehydration basket 2,
When the dehydration basket 2 is rotated at a high speed to perform the dehydration operation, the dehydrated water flows from the inside of the dehydration tank 1 to the drain pipe 5 by opening the check valve 4 of the drain port 3 with water pressure, and the water is washed through the drain pipe 5. It is discharged outside the machine. On the other hand, if there is drainage from the washing tub and this washing drainage flows back into the drainage pipe 5, the laundry drainage will try to flow into the dehydration tub 1 from the drainage port portion 3 of the dehydration tub 1, Water pressure from the outside is applied to the valve plate 8 of the check valve 4 provided in the portion 3, and the check valve 4 is closed so that the wash drainage does not flow back into the dehydration tub 1.

However, in the above prior art,
When the check valve 4 is provided in the drainage port portion 3, the protrusion 7 of the valve seat 6 holds the valve plate 8 and then the drainage pipe 5 is fitted into the bulging portion to be watertightly fixed by an adhesive. When fitted, the portion provided with the check valve 4 cannot be seen directly, and it is difficult to find out if the adhesive should stick out in the process of adhering the drain pipe 5.

If there is a case where the valve plate 8 and the valve seat 6 are partially adhered by the adhesive that sticks out, the check valve 4 operates smoothly under the pressure of water from the dehydration tank 1. As a result, the dehydration of the dehydrated water to the drainage pipe 5 will take a very long time, and drainage may not be possible in some cases.

If the check valve 4 is to be replaced when the drainage from the dehydration tank 1 cannot be carried out smoothly, the drainage pipe 5 adhered in a watertight manner is destroyed so that the drainage port 3 is removed. Since it has to be removed, it is very time-consuming and the drainage pipe 5 must be newly prepared as a replacement part in addition to the check valve 4, and the serviceability is low.

On the other hand, when a washing machine or assembled parts are discarded and the material used is to be regenerated, it is necessary to separate parts made of different materials. In order to recycle the material of the water tank 1, the valve plate 8 made of rubber must be separated, and it is difficult to recycle it due to the work of separating the bonded drainage pipe 5.

[0011]

As described above, the check valve provided at the drainage port to which the drainage pipe is connected in a watertight manner makes the outer surface of the bulging portion of the dehydration tank as the valve seat, and is made of a rubber valve plate. If the adhesive that fixes the drain pipe sticks out even part of the valve plate and the valve seat, the check valve may not operate smoothly. In addition, it was troublesome to replace the check valve, and the serviceability was low. The present invention has been made in view of such a situation, and an object of the present invention is to prevent a check valve from being stuck even if the adhesive that fixes the drainage pipe protrudes from the bonded portion, thereby ensuring a smooth check. It is an object of the present invention to provide a washer / dewaterer in which a valve can be operated and a check valve can be easily attached and detached.

[0012]

The washing and dewatering machine of the present invention comprises:
Washing and dewatering provided with a dehydration tank that rotatably accommodates a dehydration basket, a drain port formed at the bottom of this dehydration tank and connected to a drain pipe on the outer surface side, and a check valve provided at this drain port In the machine, the check valve holds the valve plate on the mounting frame so that the valve plate can be opened and closed, and the mounting frame is detachably mounted on the drainage port. It is characterized in that it is attached to the drain port so as to be removable from the inside of the dehydration tank.

[0013]

In the washing / dehydrating machine constructed as described above, the check valve holds the valve plate on the mounting frame so that the valve plate can be opened and closed, and the mounting frame is detachably mounted on the drain port. The check valve can be detachably attached to the drainage port separately from the drainage pipe being fitted into the drainage port and fixed with an adhesive, and the adhesive when the drainage pipe is fixed will stick out from the adhesive part. Even in such a case, the situation where the valve plate of the check valve and the valve seat of the mounting frame are adhered does not occur. When there is drainage from the dehydration tank, the check valve causes the valve plate to open smoothly in the discharge direction to the drain pipe by the pressure of the water, and the valve plate moves from the drain pipe to the inside of the dehydration tank. When water pressure is applied to the tank, it keeps closed and prevents backflow into the dehydration tank. Further, when the check valve needs to be replaced, only the check valve can be removed separately from the drain pipe by removing the mounting frame from the drain port portion. Therefore, a smooth operation of the check valve can be obtained, and the check valve can be easily attached and detached.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a cross-sectional view of a main part of a two-tub washing machine, FIG. 2 is a cross-sectional view of a check valve, and FIG. 3 is an assembled perspective view showing the main part in an exploded manner.

In FIG. 1, reference numeral 11 denotes a dehydrating tank formed of a synthetic resin material housed in the main body of the washing machine. Inside the dehydrating tank 11, a dehydrating basket 12 is rotatably housed. The dehydration basket 12 has an outer bottom portion to which a rotary shaft 14 of a rotary drive unit, which is provided below the dehydration tank 11 (not shown) and which penetrates the bottom portion 13 of the dehydration tank 11, is attached. Reference numeral 15 is a bellows that covers the bottom penetrating bearing portion of the spin-drying tank 11 of the rotary drive unit.

Reference numeral 16 denotes a drain port portion provided by protruding the bottom portion 13 of the dehydration tank 11 outward so as to form an opening 17, and a synthetic resin material is provided outside the drain port portion 16. The formed drain pipe 18 is fitted with an adhesive agent interposed therebetween and is watertightly fixed. A flanged stopper 19 is integrally formed on the inner wall surface of the end portion of the drainage pipe 18 fixed to the drainage port portion 16, and the flanged stopper 19 has two holes 20 formed therein.

Reference numeral 21 is a check valve, which is a cylindrical drainage port 1
An annular disc-shaped mounting frame 22 having an outer diameter dimension slightly smaller than the inner diameter dimension of 6 and a flexible valve plate 23 made of rubber are provided. That is, the valve plate 23 is substantially circular and has a larger inner diameter than the mounting frame 22 and a mounting ear portion 24 provided on a part of the outer periphery thereof, and a small hole 25 is formed in the ear portion 24.

On the other hand, the mounting frame 22 has a lower surface 26 as a valve seat, and two projections 27 are integrally formed on the lower surface 26 to stand upright, and the entire outer circumference of the mounting frame 22 is made of rubber. The packing 28 is attached. In addition, packing 28
The outer dimensions of the mounting frame 22 to which is attached are slightly larger than the inner diameter dimension of the drainage port portion 16.

The small hole 25 of the ear 24 of the valve plate 23 is inserted into one of the two protrusions 27 of the mounting frame 22 with a slight press fit, and the upper surface of the valve plate 23 is the lower surface 26 of the mounting frame 22. And is held so as to substantially evenly contact the valve seat. The tip portion of the protrusion 27 into which the valve plate 23 is inserted is in a state of protruding outward from the valve plate 23.

The check valve 21 thus constructed is mounted from the inside of the dehydration tank 11 to the drainage port 16 while elastically deforming the packing 28 with the lower surface 26 holding the valve plate 23 facing downward. At this time, the protrusion 27 is fitted into the corresponding hole 20 formed in the collar-shaped stopper 19 of the drainage pipe 18, the valve plate 23 of the mounting frame 22 and the lower surface of the ear portion 24 abut on the upper surface of the collar-shaped stopper 19. It is mounted between the mounting frame 22 and the mounting frame 22 so that it does not move up and down, and the operation of the valve plate 23 is smooth.

The check valve 21 operates such that the valve plate 23 operates as shown by an arrow C, is normally closed, and when there is drainage from the dehydration tank 11, the valve plate 23 is pressed by the water pressure. Opens in the discharge direction to the drain pipe 18 as indicated by the two-dot chain line. In addition, from the drain pipe 18 to the valve plate 23 to the dehydration tank 1
When pressure is applied to the inner side of 1, the closed state is maintained.

Therefore, when laundry is put in the dehydration basket 12 and the dehydration basket 12 is rotated at a high speed for dehydration operation, the dehydrated water opens the check valve 21 of the drainage port 16 from the dehydration tank 11 by hydraulic pressure. It is operated and flows into the drain pipe 18, and is discharged to the outside of the washing machine through the drain pipe 18. On the other hand, if there is drainage from the washing tub provided together with the dehydration tub 11 and this washing drainage flows back into the drainage pipe 18 connected to the drainage pipe of the washing tub, the drainage port 16 of the dehydration tub 11 is removed. Washing drainage tries to flow into the aquarium 11, but the drainage port 16
The pressure due to the washing drainage is applied from the outside to the valve plate 23 of the check valve 21 provided in the check valve 21, the check valve 21 maintains the closed operation state, and the washing drainage does not flow back into the dehydration tub 11.

The check valve 21 is attached to the drainage port 16 from the inside of the dehydration tank 11 separately from the drainage pipe 18 fitted into the drainage port 16 and fixed with an adhesive. Even if the adhesive that adheres to the sticker sticks out of the bonded portion, the situation in which the valve plate 23 and the valve seat of the mounting frame 22 are bonded does not occur. Therefore, it does not occur that the check valve 21 does not operate smoothly to open the drained water to the drain pipe 18 and that it takes a very long time or the drainage cannot be stopped.

When the check valve 21 needs to be replaced due to some reason, it is not necessary to destroy and remove the drain pipe 18 that is watertightly bonded to the drain port 16. It suffices to simply remove the check valve 21 from the drainage port 16 inward of the dehydration tank 11 and replace it with a new check valve 21 in the reverse order of the procedure when the check valve 21 is attached, and the service is taken without any trouble. It will be improved.

Furthermore, when the synthetic resin material used for the dehydration tank 11 and the drain pipe 18 is to be reused, the check valve 21 made of a different material such as the rubber valve plate 23 and the packing 28 is used. Is required to be separated from the dehydration tank 11, but at this time as well, the check valve 21 does not take time and effort just by pulling it out from the drainage port portion 16 toward the inside of the dehydration tank 11, contrary to when the check valve 21 is attached. It facilitates the recycling of materials.

It should be noted that the present invention is not limited to the above-described embodiments, but can be implemented with various modifications without departing from the scope of the invention.

[0027]

As is apparent from the above description, according to the present invention, the check valve is configured to hold the valve plate in the mounting frame so as to be openable and closable, and to attach the mounting frame to the drain port in a detachable manner. With the configuration, it is possible to obtain a smooth operation of the check valve and to easily attach and detach the check valve.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a sectional view of a check valve according to an embodiment of the present invention.

FIG. 3 is an assembled perspective view showing an exploded main part of the embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a conventional example.

5 is a plan view seen from the direction of arrow A in FIG.

[Explanation of symbols]

 11 ... Dehydration tank 12 ... Dehydration basket 13 ... Bottom 16 ... Drainage port 18 ... Drain pipe 21 ... Check valve 22 ... Mounting frame 23 ... Valve plate 28 ... Packing

Claims (2)

[Claims] 1. A dewatering tank for rotatably housing a dewatering basket, a drain port formed at the bottom of the dewatering tank and having a drain pipe connected to the outer surface side, and a check valve provided at the drain port. In the washing / dehydrating machine having the above-mentioned check valve, the check valve holds the valve plate on the mounting frame so that the valve plate can be opened and closed, and the mounting frame is detachably mounted on the drain port. Washing and dehydrating machine. 2. The washing / dehydrating machine according to claim 1, wherein the attachment frame is attached to the drainage port portion so as to be detachable from the inside of the dehydration tub.