JPH09220395A - Rotating vessel of dewatering-and-washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost rotating vessel of a dewatering-and-washing machine, in which space between a sleeve member and a bottom member can be sealed simply and surely. SOLUTION: A rotating vessel 8 is formed by connecting a balance ring 14, a stainless drum part 9, and a synthetic resin-made bottom member 10 to each other, and non-pored except a dewatering hole 9c and a drainage hole 10j. In this case, at the time of connecting the bottom member 10 and the drum part 9, first a packing 13 is installed on the bottom member 10. A bottom member 10 is pressed in the inner peripheral surface of the drum part 9, and with caulking the lower end part of the drum part 9, the bottom member 10 is clamped between a projecting part 9a and a caulked projected part 9b, and then a screw 11 is set in a boss part 10d through the drum part 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tub applied to a water-saving type washing machine for dehydration and combined use.

[0002]

[Problems to be Solved by the Invention]
There is a configuration in which the water from the laundry is raised along the inner surface of the rotary tub by the centrifugal force associated with the rotation of the rotary tub and is discharged from the dehydration hole located above the rotary tub. In the case of this configuration, the amount of water used is saved by performing washing, rinsing, etc. in a state where water is stored only in the rotary tank without storing water in the water receiving tank outside the rotary tank.

Conventionally, the rotary tank has been constructed by attaching a balance ring to the upper end of a cylindrical member made of stainless steel and welding a stainless steel bottom member to the lower end. Therefore, the cost was high. At the same time, in order to secure the sealing property between the tubular member and the bottom member,
For example, a troublesome work such as applying a sealant to the connecting portion between the both has been required. The present invention has been made in view of the above circumstances, and an object thereof is to provide a cost-effective spin-drying combined washing machine rotary tub capable of easily and reliably sealing between a tubular member and a bottom member. Is.

[0004]

According to a first aspect of the present invention, there is provided a rotary tub for a combined washing and dehydrating machine, comprising: a stainless steel tubular member having a dehydrating hole in an upper portion thereof; and a balance ring attached to an upper end of the tubular member. A bottom member made of a synthetic resin, which is watertightly connected to a lower end portion of the tubular member and has a drainage hole for draining out of the machine, and is characterized by being non-hole-shaped except the dehydration hole and the drainage hole. Have. According to the above means, the bottom member is made of synthetic resin. Therefore, the cost of the rotary tank is reduced as compared with the conventional case where the bottom member is made of stainless steel. At the same time, the degree of freedom in designing the bottom member is improved, so that the bottom member and the tubular member can be reliably sealed with a simple configuration.

The rotating tub of the washing machine for combined use of dehydration according to claim 2 is characterized in that both of them are made watertight by sandwiching the seal member between the tubular member and the bottom member. According to the above means, the space between the bottom member and the tubular member can be reliably sealed with a simple structure in which the seal member is sandwiched between the tubular member and the bottom member.

According to a third aspect of the present invention, there is provided a rotating tub of a washing machine for combined use of dehydration, comprising a first sandwiching portion and a second sandwiching portion which are provided on a tubular member so as to project and which face each other at a predetermined interval in the vertical direction. The member and the bottom member are connected together by sandwiching a part of the bottom member between both holding portions of the tubular member, and moreover, the seal member is attached to at least one of the upper end portion and the lower end portion of the connecting portion. It is characterized by being watertight. According to the above means, the pressing force acting on the bottom member from the sandwiching portion of the tubular member is efficiently transmitted to the seal member. Therefore, the seal member is reliably held in the elastically deformed state, so that stable sealing performance can be obtained.

In the rotary tub of the washing machine for combined use of dehydration according to claim 4, a protrusion is formed on one of the tubular member and the bottom member at a connecting portion between the two, and the other of the tubular member and the bottom member is
It is characterized in that a hole for inserting the projection is formed at the connecting portion between the both. According to the above means, when the bottom member attempts to move with respect to the tubular member due to the difference in contraction rate between the tubular member and the bottom member, the protrusion engages with the inner surface of the hole, and the bottom member moves with respect to the tubular member. to bound.

According to a fifth aspect of the present invention, there is provided a rotating tub for a combined washing machine for dehydration, characterized in that the bottom member is press-fitted into the inner peripheral surface of the tubular member. According to the above means, even if there is a difference in shrinkage amount between the tubular member and the bottom member due to temperature change and the like, the two members are kept in close contact with each other, so that the watertightness is improved.

According to a sixth aspect of the present invention, in the rotating tub of a combined washing machine for dehydration, the upper end of the bottom member is fitted to the lower end of the tubular member, and at least one of the upper end of the bottom member and the lower end of the tubular member is provided. The feature is that the taper shape becomes narrower as it goes upward. According to the above means, at least one of the lower end of the tubular member and the upper end of the bottom member has a tapered shape, so that the upper end of the bottom member is easily fitted to the lower end of the tubular member.

According to a seventh aspect of the present invention, there is provided a rotating tub for a combined washing machine for dehydration, which is characterized in that a cylindrical member is formed by welding the ends of a stainless steel plate which is rolled into a cylindrical shape. According to the above-mentioned means, the overlapping portion as in the case where the end portions of the stainless steel plates are overlapped and caulked can be eliminated, so that the strength and weight balance of the tubular member are improved.

[0011]

FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. First, in FIG.
A water receiving tank 2 is arranged inside the outer box 1. This water receiving tank 2 is elastically supported by a plurality of suspension mechanisms 3 (only one is shown). Inside the outer box 1, a mechanism section 4 is located below the water receiving tank 2. It is arranged. The mechanical unit 4 has a washing shaft 4 a and a dehydration shaft 4 b, and both shafts 4 a and 4 b penetrate the bottom of the water receiving tank 2 and project into the water receiving tank 2.

An agitator 5 is attached to the washing shaft 4a of the mechanism section 4. A connector 6 is attached to the dehydration shaft 4b. As shown in FIG. 1, a rotary tank receiver 7 is fixed to the connector 6 with a screw 6a, and a rotary tank 8 is fixed to the rotary tank receiver 7 with a screw 7a. Are reinforced by a rotary tank receiver 7. Hereinafter, the detailed configuration of the rotary tank 8 will be described.

First, in FIG. 2, the body portion 9 corresponding to the tubular member is formed by winding a stainless steel plate in a circular shape and welding the end faces of the steel sheet in a butt shape. As shown in FIG. 3, the ridge 9a is integrally formed. The ridge portion 9a corresponds to the first sandwiching portion and projects inward of the body portion 9. The bottom member 10 shown in FIG. 2 is made of synthetic resin (for example, polypropylene), and has a plate shape in which a circular bottom plate portion 10a is surrounded by a peripheral plate portion 10b.

As shown in FIG. 3, the peripheral plate portion 10b has an annular rib 10c and a plurality of boss portions 10d (see FIG. 2).
(See) are integrally formed. The outer diameter dimension R of the bottom member 10 is set to be larger than the inner diameter dimension R of the body portion 9 by about "0.5 mm". When connecting the bottom member 10 and the body portion 9, first, Bottom member 10 on the inner peripheral surface
Is pressed in. Next, as the lower end of the body 9 is crimped, a caulking protrusion 9b corresponding to a second sandwiching portion is formed in the body 9, and the peripheral plate portion is provided between the protrusion 9a and the caulking protrusion 9b. After sandwiching the upper end surface of 10b and the rib 10c, the screw 11 is fastened to each boss portion 10d through the body portion 9.

A claw portion 10e projecting downward is integrally formed at the tip of the rib 10c. As the claw portion 10e engages with the caulking protrusion 9b of the body 9, the caulking protrusion 9b is formed. To prevent it from coming off. Further, a plurality of reinforcing ribs 10f are integrally formed on the bottom member 10, and each of these ribs 10f has a function of increasing the rigidity of the bottom member 10. In addition, as shown in FIG. 2, a plurality of boss portions 10g are integrally formed on the bottom plate portion 10a of the bottom member 10, and as the screws 7a are tightened to the boss portions 10g through the rotary tank receiver 7, The bottom member 10 is fixed to the rotary tank receiver 7.

As shown in FIG. 3, the bottom member 10 is integrally formed with ribs 10h and 10i located at the upper end of the peripheral plate portion 10b. These ribs 10h and 10i have an annular shape and are formed on the rib 9a of the body 9 and the rib 1a.
Between the 0h and the rib 10i, a U-shaped housing portion 12 is provided.
Are formed. A packing 13 corresponding to a seal member is housed in the housing portion 12, and the packing 13 is sandwiched between the bottom member 10 and the body portion 9 to be The connecting portion with the bottom member 10 is kept watertight.

At the upper end of the body 9, as shown in FIG.
The balance ring 14 is attached. The balance ring 14 is made of synthetic resin, and is fixed to the body portion 9 by tightening a plurality of screws 14a (only one is shown) into the balance ring 14 through the body portion 9.

A drain cover 15 is screwed to the bottom plate in the water receiving tank 2. And water receiving tank 2 and drain cover 1
5, a drainage channel 16 is formed, and a drainage hose 18 is connected to an outlet of the drainage channel 16 via a drainage valve 17. A drainage ring 19 is attached to the drainage cover 15, as shown in FIG. The drainage ring 19 is located on the outer peripheral portion of the dehydration shaft 4b and the connector 6, and includes the drainage cover 15 and the drainage ring 19.
A seal member 20 for preventing water leakage is mounted between the and.

The rotary tank receiver 7 has a plurality of drain holes 7b (only one is shown). Further, the bottom member 10 has a large diameter drain hole 10 located at the center of the bottom plate portion 10a.
j is formed. Therefore, when water is supplied to the rotary tank 8 with the drain valve 17 closed, water is stored in the drain passage 16 from the drain holes 10j through the plurality of drain holes 7b and the drain ring 19, and the water level in the rotary tank 8 rises. . When the drain valve 17 is opened from this state, the water in the rotary tank 8 is discharged from the outlet of the drain passage 16 through the drain hose 18.

Inside the outer box 1, as shown in FIG. 2, a motor 21 is disposed on the side of the mechanism section 4,
When the motor 21 operates, the rotational force of the motor 21 is transmitted to the washing shaft 4a and the dehydration shaft 4b of the mechanism unit 4 through the belt 22. As a result, the stirring body 5 and the rotary tank 8 rotate, and the dehydration operation is performed. In addition, a clutch mechanism (not shown) is housed in the mechanism portion 4, and when the motor 21 and the clutch mechanism are operated, the spin-drying shaft 4b is rotated by the washing shaft 4.
With the sliding on a, the rotational force of the belt 22 is transmitted only to the washing shaft 4a, and the agitator 5 rotates independently. As a result, washing operations such as washing and rinsing are performed. The mechanism unit 4 includes a speed reduction mechanism (not shown) that reduces the rotation of the shafts 4a and 4b.

A plurality of dewatering holes 9c are formed at the upper end of the body 9, and the water discharged from the laundry at the time of dewatering rises along the inner surface of the rotary tub 8 and then a plurality of water are discharged. It is discharged to the outside of the rotary tank 8 through the dehydration hole 9c. Also,
A drain port 23 is formed in the water receiving tank 2. The drainage port 23 communicates with the drainage hose 18, and the water discharged to the outside of the rotary tank 8 is drained from the drainage port 23 through the drainage hose 18.

Next, the operation of the above configuration will be described. At the time of washing such as washing and rinsing, the drain valve 17 is closed, and water used for washing is stored in the rotary tub 8. Then, after the agitator 5 is rotated in the forward and reverse directions and washed, when the washing is completed, the drain valve 17 is opened, and the water in the rotary tub 8 is drained from the drain hole 10j to the drain passage 16 and the drain hose 18. Is discharged to the outside of the machine. Also, during dehydration,
With the rotation of the rotary tub 8, water from the laundry rises along the inner peripheral surface of the rotary tub 8, and the drainage holes 23 are drained from the plurality of dehydration holes 9c.
And it is discharged out of the machine through the drain hose 18.

According to the above embodiment, the bottom member 10 is made of synthetic resin. Therefore, the cost of the rotary tank 8 is reduced compared to the conventional case where the bottom member is made of stainless steel. Moreover, since the degree of freedom in designing the bottom member 10 is improved, it is possible to reliably seal the both by a simple configuration in which the packing 13 is sandwiched between the body portion 9 and the bottom member 10.

When the bottom member 10 is sandwiched between the ridge 9a and the caulking protrusion 9b of the body 9, the packing 13 is attached to the upper end of the connecting portion. Therefore, the pressing force acting on the bottom member 10 from the protruding portion 9a is transmitted to the packing 13, and the packing 13 is reliably held in the elastically deformed state, so that stable sealing performance is obtained. With this,
Due to the difference in shrinkage that occurs when different materials such as stainless steel and synthetic resin are combined, the packing 13 is not attached to the portion where the difference in dimension shrinkage is large, but the difference in dimension shrinkage is small by attaching it to the upper end of the caulking. Since it can be sealed in parts, the seal is more stable.

Further, the bottom member 10 was press fitted into the inner peripheral surface of the body portion 9. Therefore, even if there is a difference in shrinkage amount between the body portion 9 and the bottom member 10 due to a temperature change or the like, since the two are held in close contact with each other, the watertightness is improved. The body 9 was formed by welding the ends of the stainless steel plate. Therefore, it is possible to eliminate the overlapping portion such as in the case where the end portions of the stainless steel plates are overlapped and caulked, so that the strength and weight balance of the body portion 9 are improved. At the same time, when caulking the lower end portion of the body portion 9 to the bottom member 10, it becomes difficult to form a gap between them, so that the watertightness is improved.

In the first embodiment, the body 9 and the bottom member 10 are screwed and caulked, but the invention is not limited to this. For example, they may be connected only by screws, or Alternatively, the connection may be made only by caulking.

Next, a second embodiment of the present invention will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. An annular rib 10k is integrally formed on the peripheral plate portion 10b of the bottom member 10. The rib 10k is integrally formed with a protrusion 10l protruding downward, and the protrusion 10l is engaged with the caulking protrusion 9b of the body 9. Further, a plurality of annular reinforcing ribs 10m are integrally formed on the peripheral plate portion 10b of the bottom member 10.

An L-shaped accommodating portion 24 is formed between the caulking protrusion 9b of the body portion 9, the rib 10k and the lowermost rib 10m. A packing 25 corresponding to a seal member is housed in the housing portion 24, and the packing 25 is sandwiched between the body portion 9 and the bottom member 10 so that a connecting portion between them is formed. Are kept watertight.

According to the above embodiment, the bottom member 10 is attached to the body portion 9.
When connecting the, the packing 25 is housed in the housing portion 24 of the bottom member 10. Then, the bottom member 10 is press-fitted onto the inner peripheral surface of the body portion 9, and the lower end portion of the body portion 9 is caulked. Therefore, the pressing force acting on the bottom member 10 from the caulking projection 9b is transmitted to the packing 25, and the packing 25 is reliably held in the elastically deformed state, so that stable sealing performance is obtained.

In the first embodiment, the packing 13 is attached to the upper end of the connecting portion between the body 9 and the bottom member 10, and in the second embodiment, the packing 25 is attached to the lower end of the connecting portion. Although it is attached, the present invention is not limited to this, and the packing may be attached to both the upper end and the lower end of the connecting portion.

Next, a third embodiment of the present invention will be described with reference to FIG. The same members as those in the first and second embodiments will be designated by the same reference numerals and description thereof will be omitted, and only different members will be described below. A plurality of guide portions 10n are integrally formed at the upper end portion of the peripheral plate portion 10b of the bottom member 10 (only one is shown). Each of these guide portions 10n corresponds to a protrusion and extends in the vertical direction. In addition, a plurality of elongated holes 9d are formed in the body portion 9 at the protruding portions 9a (only one is shown). Each of these elongated holes 9d has an arc shape, and each guide portion 10n of the bottom member 10 is inserted into the elongated hole 9d.

A groove 10o is formed at the upper end of the peripheral plate portion 10b of the bottom member 10. This groove 10o
Are arranged on the inner peripheral side of the plurality of guide portions 10n and circulate around the bottom member 10. And the groove portion 10o
A packing 26 corresponding to a seal member is housed therein, and the packing 26 is sandwiched between the projecting portion 9a of the body portion 9 and the bottom member 10, so that the connecting portion between the two is watertight. Holds in a state.

According to the above embodiment, the bottom member 10 is attached to the body portion 9.
When connecting the above, the packing 26 is housed in the groove portion 10 o of the bottom member 10. Then, the bottom member 10 is press-fitted onto the inner peripheral surface of the body portion 9, and the lower end portion of the body portion 9 is caulked. In this case, the bottom member 10 tends to move with respect to the body portion 9 due to the difference in contraction rate between the body portion 9 and the bottom member 10. However, each of the guide portions 10n of the bottom member 10 has a long hole 9d in the body portion 9.
The horizontal movement of the bottom member 10 is restrained by engaging with the inner surface of the. Therefore, since the packing 26 is prevented from being displaced, a stable sealing property can be obtained.

In the third embodiment, the bottom member 1
Although the guide portion 10n is formed at 0 and the elongated hole 9d is formed at the body portion 9, the invention is not limited to this, and even if a groove portion is formed at the bottom member 10 and an elongated hole is formed at the body portion 9. good.

Next, a fourth embodiment of the present invention will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. A taper portion 10p corresponding to a fitting portion is integrally formed on the peripheral plate portion 10b of the bottom member 10, and the taper portion 10p has a cylindrical shape whose outer diameter decreases as it goes upward.

The lower side of the protruding portion 9a of the body portion 9 has a cylindrical shape whose outer diameter decreases as it goes upward, and the tapered portion 9e has a tapered portion 1 of the bottom member 10.
0p is being pressed in. Also, the taper portion 10
A protrusion 10q is integrally formed on the lower end surface of p, and a packing 27 corresponding to a seal member is bonded to the protrusion 10q. The packing 27 is sandwiched between the caulking projection 9b and the tapered portion 10p,
The connection between the two is kept watertight.

According to the above embodiment, the bottom member 10 is attached to the body portion 9.
When connecting the above, the packing 27 is adhered to the protrusion 10q of the bottom member 10. Then, the bottom member 10 is press-fitted onto the inner peripheral surface of the body portion 9, and the lower end portion of the body portion 9 is caulked. In this case, since the lower end of the body 9 and the upper end of the bottom member 10 are tapered, the upper end of the bottom member 10 can be easily fitted (press fitted) into the lower end of the body 9.

Although the lower end of the body 9 and the upper end of the bottom member 10 are tapered in the fourth embodiment, the invention is not limited to this. For example, the lower end of the body 9 may be formed. The upper portion of the portion or the bottom member 10 may be tapered. In addition, in the second to fourth embodiments described above, a plurality of boss portions are integrally formed on the bottom member 10, and as the screws are tightened to the boss portions through the body portion 9, both caulking and screwing are performed. The body 9 and the bottom member 10 may be connected, or both may be connected only by screws.

Further, in the above-mentioned first to fourth embodiments,
When press-fitting the bottom member 10 into the inner peripheral surface of the body portion 9, the outer diameter dimension of the bottom member 10 is set to be “0.5 m” from the inner diameter dimension of the body portion 9.
However, the present invention is not limited to this. For example, the outer diameter dimension of the bottom member 10 and the inner diameter dimension of the body portion 9 may be set to be substantially equal at room temperature.

Further, in the above-mentioned first to fourth embodiments,
The body 9 is formed by welding the ends of the circularly rolled stainless steel plate, but the invention is not limited to this. For example, the end of the stainless steel plate may be crimped or screwed. The body may be formed in accordance with the above.

Further, in the above-mentioned first to fourth embodiments,
Although the rotary tank receiver 7 is screwed to the bottom member 10, the invention is not limited to this. For example, both may be integrally formed of synthetic resin, or the rotary tank receiver 7 may be eliminated.

[0042]

As is apparent from the above description, the rotary tub of the combined washing machine of the present invention has the following effects. According to the means described in claim 1, the bottom member is made of synthetic resin. Therefore, the cost of the rotary tank is reduced as compared with the conventional case where the bottom member is made of stainless steel. With this,
Since the degree of freedom in designing the bottom member is improved, the bottom member and the tubular member can be reliably sealed with a simple configuration. According to the means described in claim 2, both can be reliably sealed with a simple structure in which the seal member is simply sandwiched between the tubular member and the bottom member.

According to the third aspect of the invention, when the bottom member is sandwiched between the two sandwiching portions of the tubular member, the seal member is attached to at least one of the upper end portion and the lower end portion of the connecting portion. Therefore, the pressing force acting on the bottom member from the sandwiching portion of the tubular member is efficiently transmitted to the seal member, so that the seal member is reliably held in the elastically deformed state, and as a result, stable sealing performance is obtained. According to the means described in claim 4, the protrusion formed on one of the tubular member and the bottom member is inserted into the hole formed on the other. Therefore, the engagement between the protrusion and the hole can restrict the movement of the bottom member due to the difference in contraction rate.

According to the means described in claim 5, the bottom member is press-fitted into the inner peripheral surface of the cylindrical member. Therefore, even if there is a difference in shrinkage amount between the tubular member and the bottom member, they are kept in close contact with each other, and as a result, the watertightness is improved. According to the means described in claim 6, when the upper end of the bottom member is fitted to the lower end of the tubular member, at least one of them is tapered. Therefore, it becomes easy to fit the upper end of the bottom member to the lower end of the tubular member. According to the means described in claim 7, in forming the tubular member, the end portions of the stainless plate are welded.
For this reason, since the overlapping portion can be eliminated, the strength and weight balance of the tubular member are improved.

[Brief description of drawings]

FIG. 1 is a view showing a first embodiment of the present invention (a cross-sectional view showing an enlarged main part).

FIG. 2 is a sectional view showing the overall configuration

FIG. 3 is a cross-sectional view showing a connecting portion between a body portion and a bottom member.

FIG. 4 is a view corresponding to FIG. 3, showing a second embodiment of the present invention;

FIG. 5 is a view corresponding to FIG. 3, showing a third embodiment of the present invention.

FIG. 6 is a view corresponding to FIG. 3 showing a fourth embodiment of the present invention.

[Explanation of symbols]

8 is a rotary tank, 9 is a body (cylindrical member), 9a is a ridge (first
Holding portion), 9b is a caulking protrusion (second holding portion), 9c
Is a dehydration hole, 9d is a long hole (hole), 10 is a bottom member, 10j is a drain hole, 10n is a guide portion (protrusion), 13 is a packing (sealing member), 14 is a balance ring, 25, 26,
27 is a packing (sealing member).

Claims (7)

[Claims] 1. A stainless steel tubular member having a dehydration hole in an upper portion, a balance ring attached to an upper end portion of the tubular member, and a watertight connection to a lower end portion of the tubular member for draining out of the machine. And a bottom member made of a synthetic resin having a drainage hole, and is a non-hole shape other than the dehydration hole and the drainage hole. 2. The rotary tub for a combined dehydrator and washing machine according to claim 1, wherein the sealing member is sandwiched between the tubular member and the bottom member so that both are watertight. 3. A first member and a second member which are provided on the tubular member so as to project and which are opposed to each other at a predetermined interval in the up-down direction, and the tubular member and the bottom member are both holding portions of the tubular member. The bottom member is connected by sandwiching a part of the bottom member between them, and is watertight when the seal member is attached to at least one of the upper end and the lower end of the connecting portion. The rotating tub of the washing machine for combined use of dehydration according to Item 1. 4. A protrusion is formed on one of the tubular member and the bottom member at a connecting portion between the two, and on the other of the tubular member and the bottom member, a protrusion is provided at a connecting portion between the two. The rotary tub for a combined washing and dehydrating machine according to claim 1, characterized in that a hole into which is inserted is formed. 5. The rotating layer of a combined washing and dehydrating machine according to claim 1, wherein the bottom member is press-fitted into the inner peripheral surface of the tubular member. 6. The upper end of the bottom member is fitted to the lower end of the tubular member, and at least one of the upper end of the bottom member and the lower end of the tubular member has a tapered shape that narrows upward. The rotating tub of the combined washing and dehydrating machine according to claim 1, wherein 7. The rotary tub of a combined washing machine according to claim 1, wherein the tubular member is formed by welding the ends of a stainless steel plate rolled into a cylindrical shape.