JPH07241398A - Washer-drier - Google Patents

Abstract

PURPOSE:To provide a washer-drier composed of a reduced number of parts and having high rigidity which is suitable for reutilization of resources. CONSTITUTION:A washer-drier tank 5 is formed of a stainless steel drum plate 22 and a bottom plate 25, and a case of a balance ring 6 comprising a cover and the case is installed on the drum plate 22 at an upper part. where the balance ring 6 is composed of inner/outer double balancers. Deformation or fall of the washerdrier tank 5 at the time of drying can thus be restricted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dewatering washing machine, and more particularly to a dewatering washing machine having a washing and dewatering tub which is highly rigid and suitable for reusing resources.

[0002]

2. Description of the Related Art A washing and dehydrating tub of a conventional dehydration washing machine is made of a synthetic resin such as polypropylene and has a bottom rear surface reinforced with radial and annular ribs, and a cylindrical side wall outer peripheral portion also has annular and vertical reinforcing ribs. In addition, a balance ring made of a synthetic resin having a circular ring-shaped interior filled with salt water or the like is integrally fastened by screwing or friction welding. However, in the case of a synthetic resin, it is difficult to reuse, and especially when a composite material or the like is used, there are cases in which it is almost impossible to reuse. Further, in the case of a synthetic resin, the rigidity is low, and due to the problem of unbalanced strength due to the shift of the cloth piece during dehydration, the dehydration rotation speed is generally 800 to 900 rotations / minute when the inner diameter is 430 to 480 mm.

Recently, in order to save resources and energy, it has been found that the washing / dehydrating tub is made of metal such as stainless steel and the dewatering speed is increased to 1000 to 1100 rev / min. The use of stainless steel for the washing and dewatering tank makes it easy to reuse the material, and the cylindrical side wall can be made thin because there are no ribs, and the inner diameter can be increased even if the outer diameter of the conventional synthetic resin tank is the same. It is possible to increase the internal volume while maintaining the external dimensions. Further, by additionally fixing a ring-shaped reinforcing material having a flange or a plastic ring-shaped reinforcing material to the fitting portion of the fluid balancer, the rigidity is enhanced and the spin-drying rotation speed is 9 to 9 times that of the conventional 800 to 900 rotations / minute.
It is possible to increase the rotation speed from 00 to 1100, so that the dehydrating power is improved and the drying time of clothes can be shortened.

[0004]

When the washing / dehydrating tub is made of metal such as stainless steel, the bottom must be strong enough to withstand the dehydration rotation. Generally, the bottom plate, which requires strength, has a plate thickness of 1.0 to 1.2 mm, and the body plate has a plate thickness of 0.5 to 0.6 mm. Further, since the body plate has a plate thickness of about 0.5 to 0.6 mm, the radial crushing strength is weaker than that of the cylindrical portion of the conventional plastic tank only by forming the cylindrical shape, and it is necessary to reinforce with a fluid balancer or the like. The fluid balancer is made of a synthetic resin and has a substantially rectangular cross section, and is filled with salt water in an annular ring. A plurality of partition plates are provided in the inner radial direction to control the movement of the salt water. The fluid balancer is generally formed by an annular lid and a case, and is sealed and fixed on the upper and lower sides by hot plate welding or the like. It is fixed to the washing / dehydrating tub by fitting the outer diameter portion of the fluid balancer to the inner diameter portion of the case plate and screwing it into a plurality of fixing holes provided on the side surface of the case from the outside of the case plate. Since the deformation of the tank due to the deviation of the cloth during dewatering is determined by the rigidity of the balancer, it is necessary to take measures such as installing another reinforcing material in order to increase the dewatering rotation speed to 900 to 1000 rpm. It was

An object of the present invention is to provide a dehydration washing machine which solves the above-mentioned problems and is inexpensive and adapted to resource saving.

[0006]

[Means for Solving the Problems] In order to reduce the deformation of the body plate of a washing / dehydrating tub, it is necessary to increase the rigidity of the fluid balancer, and a conventional single-balancer having a rectangular cross section is circumferentially partitioned. The object can be achieved by using a double balancer in which ribs are provided and the inner and outer peripheries are hermetically sealed, and a large fitting allowance is provided between the balance ring and the body plate.

[0007]

[Function] By making the fluid balancer dual, first, even if the outer shape is the same, since there are partition ribs inside, the section modulus is increased and the radial crushing strength is increased. Further, the double balancer works to make it possible to reduce the collapse of the tub due to the shift of the cloth at the time of dewatering, compared to the single balancer, to reduce the vibration and also the stress on the rotating shaft fixing the washing / dehydrating tub.

Further, the elastic deformation of the body plate can be suppressed by increasing the fitting margin between the body plate and the balancer.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a dehydration washing machine of the present invention, in which an outer tub 4 made of a synthetic resin is vibration-supported by a suspension rod 2 and a vibration-proof spring 3 in a box-shaped outer frame 1 made of a steel plate. ing. A rib 4 a for attaching the suspension rod 2 and the vibration-proof spring 3 is formed on the side wall of the outer tub 4. Inside the outer tub 4, there is provided a stainless steel washing / dehydrating tub 5 having a substantially circular horizontal cross section and a bottomed cylindrical shape. A balance ring 6 made of synthetic resin is attached to the upper end of the washing / dehydrating tub 5 with screws, a large number of dewatering holes 5a are provided on the side wall of the washing / dehydrating tub 5, and the center of the inner bottom of the washing / dehydrating tub 5 is provided. A concave portion 5b for mounting the large-sized rotary blade 7 is formed.

At the upper end of the outer tub 4, the outer tub 4 and the washing / dehydrating tub 5 are provided.
A tub cover 8 made of a synthetic resin is fixed in order to prevent the laundry from falling between and. A drainage device 9 and a drive device 10 for rotating the rotary vane 7 and the washing / dehydrating tub 5 are attached to the outer bottom portion of the outer tub 4 via a support fitting 11 made of a steel plate. As shown in FIG. 3, the support fitting 11 has a substantially box shape and is fixed to the outer bottom portion of the outer tub 4 with a screw or the like.

The drainage device 9 includes a drainage valve 12 connected to the inner bottom of the outer tank 4 and a drainage hose 13 connected to the drainage valve 12.
It has and. Opening and closing the drain valve 12 is a small synchronous motor 1
This is done by lever 12b actuated by 2a. As shown in FIG. 3, the drain valve 12 is attached to the outer tub 4 with a screw 12c. The drain hose 13 extends outside the outer frame 1 through a hole 14 provided in a lower side wall of the outer frame 1 or a plastic base 18.

As shown in FIG. 2, the drive unit 10 includes a washing machine motor 15, a clutch mechanism 16, and a transmission mechanism 17 for transmitting the rotation of the washing machine motor 15 to the clutch mechanism 16.
Is equipped with. As shown in FIG. 3, the washing machine motor 15 is fixed to the support fitting 11 with screws 15a.

The clutch mechanism 16 has a clutch spring for switching between washing and dehydration, a speed reduction mechanism, etc., and transmits the rotation of the washing motor 15 to the rotor 7 via the speed reduction mechanism during washing. At the time of dehydration, the rotation of the washing motor 15 is transmitted to the washing / dehydrating tub 5 through the hollow shaft 19 and the flange 21 by switching the clutch spring. The transmission mechanism 17 is a first pulley 17a fixed to the rotating shaft of the washing machine motor 15.
And the second pulley 1 arranged below the clutch mechanism 16.
7b, first pulley 17a and second pulley 17b
And a belt 17c wound around.

As shown in FIG. 1, the washing / dehydrating tub 5 is integrally formed by caulking an outer peripheral portion 26 with a cylindrical body plate 22 and a bottom plate 25 having a recess 5b for mounting the rotary wing 7 in the center thereof. It has become. A large number of dehydration holes 5 are formed on the side wall of the body plate 22.
It has a convex portion 23 having a substantially circular shape and an oval shape. The convex portion 23 functions as a washing plate during washing to enhance the cleaning effect and enhances the dehydration performance during dehydration. The bottom plate 25 has screws 21
It is fixed to the flange 21 by a, and has a plurality of reinforcing protrusions 25a near the outer peripheral rising edge. Generally, during dehydration, an imbalance occurs due to one-sided displacement of clothes and the inner diameter is 4
Washing and dewatering tank of 30 to 480 mm is 800 to 90 per minute
Since it rotates at high speed with 0 rotation, the hollow shaft 19 (Fig. 2) has 10
A large bending moment of 00 to 2000 kgfcm is generated, and a large bending moment is also generated in the bottom plate 25 relatively via the flange 21, so that a plate thickness of 1 to 1.2 mm is usually required.

On the other hand, since the body plate 22 has a wide contact area with clothes and a low surface pressure, a plate thickness of about 0.5 to 0.7 mm is usually sufficient, but since the plate thickness is thin, it is necessary to prevent elastic deformation. . Since the lower portion of the body plate 22 is fixed by caulking with the bottom plate 25, deformation can be prevented. On the other hand, the upper part is prevented from being deformed by an annular balance ring 6. A curling portion 27 is provided on the outer side of the upper end of the body plate 22 to facilitate the work of inserting the balance ring 6 and to improve the annular strength. The balance ring 6 is composed of a ring-shaped lid 6a and a ring-shaped case 6b, and the respective openings are welded and fixed by hot plate welding or the like. A partition rib 6c is provided in the center of the cross section of the lid 6a and the case 6b, and the partition rib 6c is also welded and integrated by the upper and lower welding, and the balance ring 6 is divided into an inner ring portion and an outer ring portion, and a double balancer is formed. To form. The inner side and the outer side of the balance ring 6 have separate salt water sealing ports (not shown), and the salt water of 40 to 60% of the internal volume is sealed and sealed. The lid 6a and the case 6b each have a plurality of radial ribs 30 and communicating holes 31, and the ribs 30 are integrated by making their positions at the time of welding the same to reinforce the cross section and to move the enclosed salt water. Acts to regulate the.

The function of the balance ring 6 is to correct the imbalance by utilizing the characteristic that the enclosed salt water moves in the opposite direction to the unbalance generated when the spin water is rotated at a constant speed. The effect also doubles.
For fixing the balance ring 6 and the body plate 22, the flange portion 32 provided on the welded portions of the lid 6a and the case 6b is used as a vertical stopper, the balance ring case 6b is mounted inside the body plate 22, and a plurality of screws 24 It is fixed from the outside of the body plate. By inserting the case 6b into the body plate 22 as a whole and increasing the fitting margin L, the rigidity of the body plate 22 can be increased. As a method of increasing the rigidity of the end portion of the body plate 22, as shown in FIG.
There is also an example in which a skirt portion 6d is provided on the outer peripheral portion of the body plate 22 and the curling portion of the body plate 22 is sandwiched between them. In this case, the skirt portion 6d needs a thickness of 2 to 3 mm in order to secure a certain degree of rigidity. The relationship between the outer diameter D1 and the outer diameter D2 of the case 6b is D2> D1, and when the inner diameter of the body plate 22 is the same, there is a problem that the gap between the outer tub 4 and the case 6b becomes small. Further, in order to maximize the effect of the fluid balancer, it is necessary to make the outer diameter of the enclosed fluid large, so that the skirt portion 6d is the outermost periphery, and the welding portion 6e of the lid 6a and the case 6b is the curling portion 6e.
This means that the case 6b and the body plate 22 are further separated from each other, and the fitting margin L is smaller than the fitting margin L shown in FIG. 1 so that the rigidity of the body plate 22 cannot be sufficiently increased.

The partition rib 6c shown in FIG. 1 serves as a double balancer to reduce the collapse due to the imbalance of the washing / dehydrating tub 5 at the time of constant rotation of the dehydration and also to increase the cross-section coefficient by providing the rib in the center. The radial crushing strength of the balance ring 6 can be increased and deformation can be suppressed to a small extent.

A lint filter 28 is attached to the side wall of the washing / dehydrating tub 5. The lint filter 28 is provided with a recess 5e in a part of the bottom plate 25 to form an inflow port 28b, and an upper end thereof is fixed by a balance ring case 6b to form a discharge port 28a for circulating water into the washing / dehydrating tub 5. The tip of the discharge port 28a has a removable lint net 2
9 is equipped.

When washing the lint filter, water is discharged from the inflow port 28b by the pumping effect of the radial back blade 7a provided on the back surface of the rotary blade 7 due to the rotation of the rotary blade 7 during the washing.
By circulating up to 8a, lint generated during washing is collected. FIG. 6 shows the cross-sectional shape of the lint filter, but the amount of circulating water can be increased by setting the ratio of the step area S1 of the cross-section 28c in the middle of circulation to the area S2 of the discharge port 28a to S2 / S1> 2 or more. Yes (S1 =
900-1000mm ² ), the water level in the washing and dewatering tank 5 is 2
The height of the discharge port 28a is 270 to 3 at about 50 to 300 mm.
00 mm, outer diameter of the rotary blade 7 is 300 to 320 mm, and the rotation speed is 12
A circulating water flow rate of 40 liters per minute can be generated at 0 to 130 rpm.

[0020]

According to the present invention, the entire case of the balance ring is mounted on the body plate of the washing / dehydrating tank to increase the fitting margin, and the balance ring is made into the inner and outer double balancers. It is possible to suppress the elastic deformation of the washing / dehydrating tub at the time of steady rotation of the dehydration and reduce the collapse of the washing / dehydrating tub when an imbalance occurs. As a result, the spin-drying speed can be set to 900 rpm without adding a reinforcing member for the body plate or the balance ring as a separate piece.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a washing / dehydrating tank according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of the washing machine according to the embodiment of the present invention.

FIG. 3 is a plan view from the bottom of the washing machine according to the embodiment of the present invention.

FIG. 4 is a detailed view of the vicinity of the inflow port of the lint filter.

FIG. 5 is a fitting diagram of a conventional fluid balancer and a washing / dehydrating tub.

6 is a cross section taken along the line AA of FIG.

[Explanation of symbols]

5 ... Washing / dehydrating tank, 6 ... Balance ring, 6a ... Annular lid, 6b ... Annular case, 6c ... Partition ribs, 22 ...
Body plate, 25 ... Bottom plate, 28 ... Lint filter.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takami Koyama 1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki Prefecture Living Equipment Division, Hitachi, Ltd. (72) Tetsushi Yoshida 1-chome, Higashitaga-cho, Hitachi-shi, Ibaraki No. 1-1 Living Equipment Division, Hitachi, Ltd. (72) Inventor, Yuzuru Miyano 1-1-1, Higashi-Tagacho, Hitachi City, Ibaraki Prefecture Living Equipment Division, Hitachi, Ltd.

Claims (2)

[Claims] 1. A washing / dehydrating tub having rotating blades at the bottom, an outer tub for rotatably including the washing / dehydrating tub, a support device for supporting the outer tub with vibration isolation from an outer frame, and the rotating wing. And a dewatering washing machine comprising a drive device for rotating the washing and dewatering tub, wherein the washing and dewatering tub is a metal-made substantially cylindrical body plate,
The bottom plate is made of a substantially circular metal and has a recess for arranging the rotary blades in the center, and the body plate and the bottom plate are fastened together by folding and crimping the outer peripheral ends and the upper end surface of the body plate. Has a curl shape on the outside and its inner diameter engages with the outer diameter of an annular double fluid balancer having independent flow passages on the inside and the outside, and the body plate and the dual fluid balancer are connected by a plurality of screws. A dehydration washing machine characterized by being fixed. 2. The dewatering washing machine according to claim 1, wherein the double fluid balancer is formed of an annular lid and a case, and substantially the entire outer peripheral surface of the case is fitted inside the body plate. .