CN110709554A - Washing and dewatering drum and washing machine - Google Patents

Abstract

A bottom part (102) of a pad holding part (H1) which forms a ring shape with the inner peripheral surface of the cylindrical body part (101) is arranged on the lower end side of the cylindrical body part (101). The annular packing gland (103) is attached to the bottom part (102) in such a manner that the annular packing (104) of the annular packing holding part (H1) held between the inner peripheral surface of the cylindrical body part (101) and the outer peripheral surface of the bottom part (102) is pressed from below by the upper end of the annular packing gland (103). An annular gasket (104) is abutted against the lower surface of the lowermost flange part (102c) of a plurality of flange parts (102a, 102b, 102c) which are provided at intervals in the vertical direction over the entire circumference of the outer peripheral surface of the bottom part (102), and the annular gasket (104) is elastically deformed by pressing the annular gasket (104) via the upper end of the annular gasket pressing cover (103). Thus, a washing and dewatering cylinder capable of improving water tightness between a metal cylindrical machine body part and a synthetic resin bottom part through a simple structure is provided.

Description

Washing and dewatering drum and washing machine

Citation description

The present application claims a priority benefit to japanese application 2017-107037 filed on 30/5/2017, and incorporates the entire contents of the disclosure of the japanese application.

Technical Field

The invention relates to a washing and dewatering drum and a washing machine.

Background

Conventionally, as disclosed in japanese patent No. 3078684 (patent document 1), a washing and dewatering tub includes a cylindrical body portion made of stainless steel plate and a bottom portion made of stainless steel plate attached to a lower end opening peripheral edge portion of the cylindrical body portion, and is disposed in a water tank of a washing machine.

The peripheral edge of the upper opening of the bottom is bent inward in an inverted U-shape to form a hemmed seam. On the other hand, the lower end opening peripheral edge of the cylindrical body section is bent outward in a U-shape to form a hemmed seam section. The seaming portion of the bottom portion and the seaming portion of the tubular body portion are joined by seaming, and a sealing material is filled between the seaming portions, thereby achieving watertight sealing between the lower end opening peripheral edge portion of the tubular body portion and the upper end opening peripheral edge portion of the bottom portion.

Further, since the peripheral wall of the cylindrical body portion is not provided with the through hole, water is not accumulated between the washing and dehydrating tub and the water tank in the washing step. Therefore, the washing and dewatering cylinder can improve the water saving performance.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 3078684

Disclosure of Invention

Technical problem to be solved by the invention

However, since the conventional washing and dewatering tub is formed of a stainless steel plate for both the cylindrical body portion and the bottom portion, the manufacturing cost can be reduced by using a synthetic resin bottom portion instead of the stainless steel plate bottom portion. That is, there is a problem that the cost cannot be sufficiently reduced in the conventional washing and dehydrating drum.

However, in order to solve the above-described problems, the following problems newly arise when a synthetic resin bottom is used instead of the stainless steel bottom.

First, in order to ensure watertight sealing between the inner peripheral surface of the lower end opening peripheral edge portion of the cylindrical body section and the outer peripheral surface of the bottom section using the synthetic resin bottom section, it is necessary to dispose an annular gasket over the entire periphery therebetween.

However, since the cylindrical body portion is formed by bending the stainless steel plate, it is difficult to fix the distance between the inner peripheral surface of the lower end opening peripheral edge portion of the cylindrical body portion and the outer peripheral surface of the bottom portion over the entire circumference. Therefore, there is a problem that: a gap is formed between the lower end opening peripheral edge of the cylindrical body part and the annular gasket to reduce the water tightness between the cylindrical body part and the bottom part.

As a result, in the case of a washing and dewatering tub in which no through-hole is provided in the peripheral wall of the tubular body portion, even if water is accumulated in the washing and dewatering tub during the washing process, the water leaks from the gap between the washing and dewatering tub and the water tank, and thus the water saving performance is lowered.

Accordingly, an object of the present invention is to provide a washing and dehydrating tub and a washing machine having the same, which can improve water tightness between a metal cylindrical body part and a synthetic resin bottom part with a simple structure.

Means for solving the problems

A washing and dewatering tub according to an aspect of the present invention includes:

a metal cylindrical body section;

a synthetic resin bottom portion disposed at a lower end side of the cylindrical body portion and forming an annular pad holding portion between the synthetic resin bottom portion and an inner peripheral surface of the cylindrical body portion;

an annular gasket held by the annular gasket holding portion between the inner peripheral surface of the cylindrical body portion and the outer peripheral surface of the bottom portion; and

an annular packing gland attached to the bottom portion so as to press the annular packing held by the annular packing holding portion from below through an upper end,

the bottom portion has a plurality of flange portions provided at intervals in the vertical direction over the entire circumference of the outer peripheral surface,

the annular packing is in contact with the lower surface of the lowermost flange portion among the plurality of flange portions,

and the upper end of the annular gasket gland presses the annular gasket, so that the annular gasket is elastically deformed.

In addition, a washing machine according to an aspect of the present invention is characterized in that,

the washing and dehydrating drum is provided.

Effects of the invention

According to the present invention, the upper end of the annular gasket pressing cover presses the annular gasket of the gasket holding section held between the inner peripheral surface of the metal cylindrical body section and the outer peripheral surface of the synthetic resin bottom section upward to deform the gasket elastically, thereby realizing a washing and dewatering tub and a washing machine having the washing and dewatering tub, which can improve the water tightness between the metal cylindrical body section and the synthetic resin bottom section with a simple configuration.

Drawings

Fig. 1 is an external perspective view of a vertical washing machine as an example of a washing machine according to a first embodiment of the present invention.

Fig. 2 is a plan view of the vertical type washing machine.

Fig. 3 is a longitudinal sectional view seen from the line III-III of fig. 2.

Fig. 4 is an enlarged longitudinal sectional view of a main portion of fig. 3.

Fig. 5 is a rear view of the washing and dehydrating tub.

Fig. 6 is a longitudinal sectional view taken along line VI-VI of fig. 5.

Fig. 7A is an enlarged cross-sectional view of the ring-shaped gasket in the state where the region a of fig. 6 is not attached.

Fig. 7B is an enlarged cross-sectional view of a state in which the ring-shaped packing of the area a of fig. 6 is attached.

Fig. 8A is an enlarged cross-sectional view of a state where the ring-shaped packing of the region B of fig. 6 is not mounted.

Fig. 8B is an enlarged cross-sectional view of a state in which the ring-shaped packing of the region B of fig. 6 is attached.

Fig. 9 is an exploded perspective view of the washing and dehydrating tub.

Fig. 10 is a perspective view of the annular gasket cover of the washing and dehydrating tub.

Fig. 11 is a plan view of the annular packing gland.

Fig. 12 is a side view of the annular packing gland.

Fig. 13 is a longitudinal sectional view taken along line XIII-XIII in fig. 11.

Fig. 14 is a perspective view of the bottom of the washing and dehydrating tub as viewed obliquely from below.

Fig. 15 is an enlarged sectional view of a main part of a vertical washing machine as an example of a washing machine according to a second embodiment of the present invention.

Fig. 16 is an enlarged sectional view of a main part of the washing and dehydrating tub.

Fig. 17 is a cross-sectional view of the lower end of the cylindrical body of the washing and dehydrating tub.

Fig. 18 is an enlarged sectional view of a main part of a vertical washing machine as an example of a washing machine according to a third embodiment of the present invention.

Fig. 19 is an enlarged sectional view of a main part of the washing and dehydrating tub.

Fig. 20 is a cross-sectional view of the lower end of the cylindrical body of the washing and dehydrating tub.

Detailed Description

Hereinafter, the washing and dehydrating tub and the washing machine according to the present invention will be described in detail with reference to the illustrated embodiments.

[ first embodiment ]

Fig. 1 is an external view of a vertical washing machine as an example of a washing machine according to a first embodiment of the present invention, as viewed from obliquely above from the front side, and fig. 2 is a plan view of the vertical washing machine.

As shown in fig. 1 and 2, the vertical washing machine according to the first embodiment includes: a main body case 1 made of metal or synthetic resin; an upper cover 4 for opening and closing the openings of the water tank 2 (shown in fig. 3) and the washing and dehydrating tub 100 (shown in fig. 3); and an operation display unit 5 provided on the upper surface of the main body casing 1. The user operates the operation display unit 5 to select an operation. The operation display unit 5 displays the operation state by characters, numerals, and the like.

Fig. 3 is a longitudinal sectional view taken along line III-III of fig. 2.

As shown in fig. 3, the vertical washing machine has a main body casing 1 formed in a square cylindrical shape, and has an upper surface opening portion on an upper surface and a lower surface opening portion on a lower surface. A synthetic resin upper surface plate 11 provided with an operation display unit 5 and the like is fixed to an upper surface opening of the main body case 1. A base 12 made of synthetic resin is fixed to the lower surface opening of the main body case 1.

A laundry inlet 1a for introducing laundry into the vertical washing machine is provided in the upper surface plate 11. The upper cover 4 for opening and closing the laundry inlet 1a is rotatably supported by an upper panel 11 on the deep side (rear side) of the vertical washing machine. The laundry inlet 1a is opened and closed by rotating the upper lid 4 in the vertical direction.

A water tank 2 is disposed in the main body casing 1, and a washing and dehydrating tub 100 is disposed in the water tank 2. That is, the washing and dehydrating tub 100 and the water tub 2 accommodating the washing and dehydrating tub 100 are accommodated in the main body casing 1. In the washing and dewatering tub 100, water for washing the laundry or water for rinsing the laundry is accumulated. The water tank 2 and the washing and dewatering tub 100 are each in a bottomed tubular shape with an open upper side, and the central axis is parallel to the plumb direction. The central axis of the water tank 2 coincides with the central axis of the washing and dewatering tub 100.

An annular balancer 40 is attached to the edge of the upper opening of the washing and dewatering tub 100. The ring balancer 40 functions to suppress vibration when the washing and dewatering tub 100 is rotated at a high speed for dewatering laundry. Further, a synthetic resin stirring blade (pulsator) 20 is rotatably disposed on the bottom surface in the washing and dewatering tub 100.

A clutch/brake mechanism 50 and a drive motor (not shown) constituting a drive unit for driving the washing and dehydrating tub 100 and the agitating blade 20 are provided below the water tub 2. The central portion of the stirring blade 20 is attached to the tip of the rotating shaft 51 of the clutch/brake mechanism 50, and the bottom of the water tank 2 is attached to a portion of the rotating shaft 51 below the tip.

The vertical washing machine includes a water supply unit 10 for supplying water into the washing and dewatering tub 100.

Fig. 4 is an enlarged longitudinal sectional view of a main part of the washing and dehydrating tub 100. In fig. 4, the same components as those in fig. 3 are denoted by the same reference numerals.

As shown in fig. 4, the washing and dehydrating tub 100 includes a cylindrical body 101 made of metal (e.g., stainless steel), and a bottom 102 made of synthetic resin (e.g., plastic) disposed on the lower end side of the cylindrical body 101. The cylindrical body 101 has a dewatering drain hole 101d (see fig. 9) above the water level during washing, and is formed of a peripheral wall having a diameter that increases toward the upper side (see fig. 6). The bottom portion 102 has a cup shape with a concave portion for accommodating the stirring blade 20.

A plurality of drainage grooves (not shown) extending in the vertical direction are provided on the inner circumferential surface of the cylindrical body section 101. During the dewatering operation, when the washing and dewatering tub 100 rotates at a high speed, the water in the washing and dewatering tub 100 rises along the inner peripheral surface of the washing and dewatering tub 100 by centrifugal force. At this time, the water rising along the inner peripheral surface of the washing and dewatering tub 100 is guided to a gap (not shown) provided in the upper portion by the drainage groove, and flows out between the water tub 2 and the washing and dewatering tub 100 through the gap and the dewatering drainage hole 101 d.

The peripheral wall of the cylindrical body 101 is a conical non-porous wall inclined with respect to the central axis of the washing and dehydrating tub 100. The cylindrical body section 101 is formed into a cylindrical shape by first cutting a thin plate (0.5 to 0.6mm in thickness) made of stainless steel into a fan shape, rolling the fan-shaped body plate into a conical body plate material having an upward diameter, and joining the joint portions after the rolling by seaming.

Fig. 5 is a rear view showing the washing and dehydrating tub 100. In fig. 5, the same components as those in fig. 3 and 4 are denoted by the same reference numerals.

Fig. 6 is a longitudinal sectional view taken along line VI-VI in fig. 5. A region a (a circular portion of a broken line) shown in fig. 6 shows a portion where the ring-shaped packing gland 103 (shown in fig. 7A) is fixed to the bottom portion 102 by screws, and a region B (a circular portion of a broken line) shown in fig. 6 shows a portion where the cylindrical body portion 101 is fixed to the bottom portion 102 via the ring-shaped packing gland 103 (shown in fig. 8A) by screws.

Fig. 7A is an enlarged cross-sectional view of the region a of fig. 6 (without the annular packing 104), and fig. 7B is an enlarged cross-sectional view of the state where the annular packing 104 of the region a of fig. 6 is attached. In the ring-shaped packing gland 103 of fig. 7A and 7B. Reference numeral 103a denotes an outer peripheral wall portion, 103b an upper end portion, 103c an annular bottom portion, and 103d an inner peripheral wall portion (see fig. 10).

As shown in fig. 7A and 7B, the first flange portion 102a is provided over the entire outer peripheral surface of the upper end portion of the bottom portion 102. A second flange portion 102b is provided on the outer peripheral surface of the bottom portion 102, at a predetermined interval below the first flange portion 102a, over the entire periphery. A third flange portion 102c is provided on the outer peripheral surface of the bottom portion 102, at a predetermined interval below the second flange portion 102b, over the entire periphery. An annular rib 102d (see fig. 14) extending downward from the base of the third flange 102c of the bottom portion 102 is provided upright.

The positioning portion 110 is provided at the lower end portion of the cylindrical body portion 101 over the entire circumference, and the positioning portion 110 projects above the first flange portion 102a of the bottom portion 102 and radially inward of the outer peripheral edge of the first flange portion 102 a. The cross section of the positioning part 110 is substantially V-shaped.

The bottom part 102 is inserted into the lower end opening of the cylindrical body part 101 from below, and the upper part of the first flange part 102a of the bottom part 102 abuts against the positioning part 110, thereby positioning the bottom part 102 with respect to the cylindrical body part 101. At this time, an annular gasket holding portion H1 is formed between the lower side of the positioning portion 110 of the cylindrical body section 101 and the outer peripheral surface of the annular rib 102d of the bottom portion 102 and below the third flange portion 102 c. The annular packing 104 is held by the annular packing holding portion H1. The annular gasket 104 has a circular cross section (in a state where no pressure is applied from the periphery). The sectional shape of the annular packing 104 is not limited to a circular shape, and may be set as appropriate according to the structure of the cylindrical body portion or the bottom portion.

Then, the annular packing gland 103 is inserted from below between the inner peripheral surface of the cylindrical body portion 101 and the outer peripheral surface of the annular rib 102d of the bottom portion 102, and the annular packing gland 103 is attached to the bottom portion 102 by the screw 121. At this time, the screw 121 is fastened to the screw hole 122 of the bottom portion 102 from below, whereby the annular packing 104 is pressed by the upper end portion 103b of the annular packing cover 103. Thereby, the annular packing 104 is elastically deformed, and the annular packing 104 is biased radially outward with respect to the inner circumferential surface of the cylindrical body section 101. The upper end portion 103b of the annular packing gland 103 is formed in a substantially flat shape and chamfered over the entire inner and outer circumferential sides.

A plurality of fastening portions fastened by the screws 121 are provided at equal intervals in the circumferential direction in the annular packing gland 103, and the annular packing 104 is uniformly pressed by the upper end of the annular packing gland 103.

At this time, the annular packing 104 is further pressed against the lower surface of the third flange 102c of the bottom portion 102. Therefore, the space between the cylindrical body section 101 and the bottom section 102 can be reliably sealed.

As described above, the screw 121 for attaching the annular packing gland 103 to the bottom portion 102 is tightened, and the annular packing 104 is pressed by the upper end of the annular packing gland 103, whereby the annular packing 104 is elastically deformed, and the annular packing 104 is biased radially outward with respect to the inner peripheral surface of the cylindrical body portion 101, whereby the assembling property is improved.

On the other hand, fig. 8A is an enlarged cross-sectional view of the region B of fig. 6 (without the annular packing 104), and fig. 8B is an enlarged cross-sectional view showing a state in which the annular packing 104 of the region B of fig. 6 is attached. In fig. 8A and 8B, the same components as those in fig. 7A are denoted by the same reference numerals.

As shown in fig. 8A and 8B, the bottom portion 102 is attached to the lower end side of the cylindrical body portion 101 via an annular packing cover 103 by screws 123. At this time, by fastening the screw 123 to the screw hole 124 of the bottom part 102 from the outer peripheral surface side of the cylindrical body part 101, the fixing portion of the bottom part 102 can be provided in the vicinity of the annular gasket 104 on the lower end side of the cylindrical body part 101, and the annular gasket cover 103 can be used also for fixing the cylindrical body part 101 and the bottom part 102. A plurality of fastening portions fastened by the screws 123 are provided at equal intervals in the circumferential direction on the lower end side of the cylindrical body section 101.

In the washing and dewatering tub 100 having the above-described configuration, the upper flange portion 102a of the plurality of flange portions 102a, 102b, and 102c provided at intervals in the vertical direction over the entire outer peripheral surface of the bottom portion 102 is used for positioning the cylindrical body portion 101 with respect to the positioning portion 110. Of the plurality of flange portions 102a, 102b, and 102c, the lower flange portion 102c is used for positioning the annular packing 104. The middle flange portion 102b is used to reinforce the strength of the bottom portion 102.

Further, the plurality of flange portions 102a, 102b, and 102c are provided at intervals in the vertical direction on the outer peripheral surface of the bottom portion 102, and the flange portion 102c that positions the annular packing 104 is disposed downward, whereby the position of the annular packing 104 can be lowered. This can shorten the vertical dimension of the annular packing gland 103, facilitate insertion of the annular packing gland 103, and strongly and uniformly press the annular packing 104, thereby improving sealing performance.

Fig. 9 is an exploded perspective view of the washing and dehydrating tub 100. As shown in fig. 9, the washing and dehydrating tub 100 has a bottom portion 102 attached to the lower inner periphery of a cylindrical body 101. Next, after the annular packing 104 is inserted into the annular packing holding portion H1 (shown in fig. 7A and 8A) between the inner peripheral surface of the cylindrical body section 101 and the outer peripheral surface of the bottom section 102, the annular packing cover 103 is inserted from below between the inner peripheral surface of the cylindrical body section 101 and the outer peripheral surface of the bottom section 102.

Next, the cylindrical body portion 101 and the bottom portion 102 are fixed via the annular packing gland 103 by fastening the screw 121 from below (as shown in fig. 7A), and then fastening the screw 123 from the radially outer side (as shown in fig. 8A) after attaching the annular packing gland 103 to the bottom portion 102.

Fig. 10 is a perspective view of the annular packing gland 103 of the washing and dehydrating tub 100, and fig. 11 is a plan view of the annular packing gland 103. As shown in fig. 10 and 11, the annular packing gland 103 includes: a short cylindrical outer peripheral wall portion 103a, an upper end portion 103b provided at the upper end of the outer peripheral wall portion 103a, an annular bottom portion 103c provided over the entire circumference of the inner peripheral surface on the lower end side of the outer peripheral wall portion 103a, a short cylindrical inner peripheral wall portion 103d provided over the entire circumference of the inner peripheral side of the annular bottom portion 103c, and a plurality of ribs 103e connecting the inner peripheral surface of the outer peripheral wall portion 103a and the outer peripheral surface of the inner peripheral wall portion 103 d. The upper end of the inner peripheral wall 103d is lower than the upper end 103b provided at the upper end of the outer peripheral wall 103 a.

A plurality of first screw hole portions 103f are provided at intervals in the circumferential direction of the outer peripheral wall portion 103 a. The first screw hole portion 103f has a screw hole 124 shown in fig. 8A. Further, a plurality of second screw hole portions 103g are provided at intervals in the circumferential direction in the annular bottom portion 103 c. The second screw hole portion 103g has a screw hole 122 shown in fig. 7A.

Fig. 12 shows a side view of the above-described ring-shaped packing gland 103, and fig. 13 shows a longitudinal sectional view as viewed from line XIII-XIII in fig. 11. In fig. 12 and 13, the same components as those in fig. 11 are denoted by the same reference numerals.

Fig. 14 is a perspective view of the bottom 102 of the washing and dehydrating tub 100 as viewed obliquely from below. In fig. 14, the same components as those in fig. 7A and 8A are denoted by the same reference numerals.

As shown in fig. 14, the first flange portion 102a, the second flange portion 102b, and the third flange portion 102c are provided at intervals in the vertical direction so as to extend over the entire outer peripheral surface of the upper end portion of the bottom portion 102. An annular rib 102d extending downward from the base of the third flange 102c of the bottom portion 102 stands.

According to the washing and dewatering tub 100 having the above-described configuration, the annular packing 104 of the annular packing holding portion H1 held between the inner peripheral surface of the cylindrical body 101 and the outer peripheral surface of the bottom portion 102 is pressed upward by the upper end of the annular packing cover 103 to be elastically deformed, whereby the annular packing 104 is biased radially outward with respect to the inner peripheral surface of the cylindrical body 101. This enables the inner circumferential surface of the cylindrical body section 101 to be brought into close contact with the annular packing 104, thereby improving the water tightness between the inner circumferential surface of the cylindrical body section 101 and the annular packing 104.

When the annular packing 104 is pressed upward by the upper end of the annular packing gland 103, the lowermost flange portion 102c of the plurality of flange portions 102a, 102b, and 102c provided at intervals in the vertical direction over the entire circumference of the outer peripheral surface of the bottom portion 102 restricts upward movement of the annular packing 104 in the axial direction, and therefore the annular packing 104 is in close contact with the lower surface of the third flange portion 102 c. This can improve the water tightness between the lowermost flange portion 102c of the bottom portion 102 and the annular packing 104.

As described above, when the annular packing gland 103 is attached to the bottom part 102 in a state where the annular packing 104 is fitted between the inner peripheral surface of the cylindrical body part 101 and the outer peripheral surface of the bottom part 102 and outside the outer peripheral surface of the bottom part 102, the annular packing 104 is pressed against the annular packing 104 by the upper end of the annular packing gland 103, and the annular packing 104 can be easily elastically deformed, so that the assembling property is good and the water tightness can be ensured.

Therefore, in the washing and dewatering tub 100, the water tightness between the metal cylindrical body 101 and the synthetic resin bottom 102 can be improved with a simple structure.

Further, by using the bottom portion 102 made of synthetic resin, cost reduction and weight reduction can be achieved. Further, the gap between the stirring blade (impeller) 20 and the bottom portion 102 can be easily optimized to prevent foreign matter such as coins from being mixed into the gap between the stirring blade 20 and the bottom portion 102.

A slide mold structure for the screw holes of the cylindrical body 101 and the bottom 102 of the washing and dewatering tub 100 in the lateral direction (outside the diameter) is required, and according to this structure, a sufficient distance can be secured between the lower surface of the first flange 102a and the upper surface of the third flange 102c, and therefore, a slide mold structure without a problem in strength can be produced. Therefore, since the first flange portion 102a and the third flange portion 102c can be manufactured by the vertical molds, it is possible to manufacture a member having no difference in joint height of the molds with an accurate diameter. Accordingly, the washing and dewatering tub 100 having high roundness and good quality with less vibration and the washing and dewatering tub 100 having high water saving performance without height difference and high sealing property with the packing 104 can be manufactured.

On the other hand, if there is only one flange portion at the bottom, the slide die structure for the screw hole portion cannot be in a state of strength and no problem in structure, and the roundness around the flange portion is reduced and a level difference is generated in the seal portion to lower the sealability, which causes a problem of quality degradation.

Further, since the annular packing 104 is positioned by the lowermost flange portion 102c, the annular packing 104 does not bulge upward, and the appearance can be maintained.

Further, since the positioning portion 110 provided at the lower end portion of the cylindrical body section 101 projects upward toward the uppermost flange portion 102a of the plurality of flange portions 102a, 102b, and 102c of the bottom portion 102 and radially inward of the outer peripheral edge of the flange portion 102a, when the bottom portion 102 is disposed at the lower end side of the cylindrical body section 101, the upper side of the uppermost flange portion 102a of the bottom portion 102 abuts against the positioning portion 110 of the cylindrical body section 101, and the bottom portion 102 can be positioned with respect to the cylindrical body section 101.

Further, by making the region below the positioning portion 110 of the cylindrical body section 101 cylindrical, the bottom portion 102 having an outer diameter substantially equal to the inner diameter of the cylindrical body section 101 can be assembled from below, and therefore the cylindrical body section 101 and the bottom portion 102 can be assembled without a gap. Accordingly, the washing and dewatering tub 100 having high roundness and high vibration accuracy can be manufactured, and vibration during dewatering caused by vibration of the washing and dewatering tub 100 can be suppressed to be small.

Further, by using a material having higher rigidity than the material of the bottom portion 102 for the annular packing gland 103, the strength of the bottom portion 102 can be improved.

Further, a vertical washing machine having the washing and dewatering tub 100 can be realized, and the washing and dewatering tub 100 can improve the water tightness between the metal cylindrical body 101 and the synthetic resin bottom 102 with a simple structure, thereby preventing the deterioration of the water saving performance.

In the first embodiment, the annular packing gland 103 having the substantially flat shape of the upper end portion 103b is used, but the shape of the upper end portion of the annular packing gland is not limited thereto, and may be any shape as long as the annular packing 104 can be elastically deformed.

[ second embodiment ]

Fig. 15 is an enlarged cross-sectional view of a main part of a vertical washing machine (corresponding to a region a shown in fig. 6) as an example of a washing machine according to a second embodiment of the present invention, and fig. 16 is an enlarged cross-sectional view of a main part of the washing and dewatering drum of the vertical washing machine (corresponding to a region B shown in fig. 6). The washing and dewatering tub of the second embodiment has the same configuration as the washing and dewatering tub 100 of the vertical washing machine of the first embodiment except for the cylindrical body 201, the bottom 202, the annular packing cover 203, and the like, and fig. 1 to 6 are referred to.

As shown in fig. 15 and 16, the washing and dewatering tub according to the second embodiment has a conical tubular shape in which a lower region S1 (shown in fig. 17) of the positioning portion 210 of the tubular body section 201 is gradually enlarged in diameter downward.

Further, a first flange portion 202a is provided over the entire outer peripheral surface of the upper end portion of the bottom portion 202. Further, a second flange portion 202b is provided on the outer peripheral surface of the bottom portion 202 at a predetermined interval below the first flange portion 202a over the entire periphery. A third flange portion 202c is provided on the outer peripheral surface of the bottom portion 202 at a predetermined interval below the second flange portion 202b over the entire periphery. An annular rib 202d extending downward from the root side of the third flange portion 202c of the bottom portion 202 is provided upright.

Further, a positioning portion 210 is provided at the lower end portion of the cylindrical body section 201 over the entire circumference, and the positioning portion 210 projects above the first flange portion 202a of the bottom section 202 and radially inward of the outer peripheral edge of the first flange portion 202 a. The cross section of the positioning part 210 is formed in a substantially V-shape.

The bottom portion 202 is inserted into the lower end opening of the tubular body section 201 from below, and the upper portion of the first flange portion 202a of the bottom portion 202 abuts against the positioning portion 210, thereby positioning the bottom portion 202 with respect to the tubular body section 201. At this time, an annular gasket holding portion H2 is formed between the lower side of the positioning portion 210 of the cylindrical body section 201 and the outer peripheral surface of the annular rib 202d of the bottom portion 202 and on the lower side of the third flange portion 202 c. The annular packing 204 is held by the annular packing holding portion H2. The cross section of the annular gasket 204 is circular in a state where no pressure is applied from the periphery.

Further, the annular packing gland 203 is inserted from below between the inner peripheral surface of the cylindrical body portion 201 and the outer peripheral surface of the annular rib 202d of the bottom portion 202, and the annular packing gland 203 is attached to the bottom portion 202 by a screw 221. At this time, the screw 221 is fastened to the screw hole 222 of the bottom portion 202 from below, whereby the annular packing 204 is pressed by the upper end portion 203b of the annular packing gland 203. Thereby, the annular packing 204 is elastically deformed, and the annular packing 204 is biased radially outward with respect to the inner peripheral surface of the cylindrical body section 201.

Fig. 17 shows a cross-sectional view of the lower end portion of the cylindrical body section 201, where L1 is a generatrix of an imaginary cylindrical surface extending downward from the positioning portion 210 of the cylindrical body section 201, and L2 is a generatrix of a conical cylindrical surface of the region S1 below the positioning portion 210 of the cylindrical body section 201. As shown in fig. 17, L1 and L2 intersect on the same plane, and the angle formed by L1 and L2 is θ 1 (for example, about 1deg to 2 deg).

According to the second embodiment, the bottom portion 202 having the plurality of flange portions 202a, 202b, and 202c provided over the entire outer peripheral surface is easily inserted into the cylindrical body portion 201 by forming the region S1 below the positioning portion 210 of the cylindrical body portion 201 into a conical cylindrical shape having a diameter gradually increasing downward, and workability is improved.

The washing and dehydrating drum of the second embodiment has the same effects as the washing and dehydrating drum 100 of the first embodiment.

[ third embodiment ]

Fig. 18 is an enlarged cross-sectional view of a main part of a vertical washing machine (corresponding to a region a shown in fig. 6) as an example of a washing machine according to a second embodiment of the present invention, and fig. 19 is an enlarged cross-sectional view of a main part of the washing and dehydrating tub of the vertical washing machine (corresponding to a region B shown in fig. 6). The washing and dewatering tub of the second embodiment has the same configuration as the washing and dewatering tub 100 of the vertical washing machine of the first embodiment except for the cylindrical body 301, the bottom 302, the annular packing cover 303, and the like, and fig. 1 to 6 are referred to.

As shown in fig. 18 and 19, in the washing and dewatering tub according to the third embodiment, a region S21 (shown in fig. 20) corresponding to the plurality of flange portions 302a, 302b, and 302c out of the lower region of the positioning portion 310 of the cylindrical body 301 is cylindrical. Further, a lower region S22 of a region S21 (shown in fig. 20) below the positioning portion 310 of the cylindrical body section 301 is a conical cylinder whose diameter increases gradually downward.

Further, a first flange portion 302a is provided over the entire outer peripheral surface of the upper end portion of the bottom portion 302. Further, a second flange portion 302b is provided on the outer peripheral surface of the bottom portion 302 over the entire periphery thereof, with a predetermined gap between the first flange portion 302a and the lower side. A third flange portion 302c is provided on the outer peripheral surface of the bottom portion 302 at a predetermined interval below the second flange portion 302b over the entire periphery. An annular rib 302d extending downward from the root side of the third flange portion 302c of the bottom portion 302 is provided upright.

The positioning portion 310 is provided at the lower end portion of the cylindrical body section 301 over the entire circumference, and the positioning portion 310 protrudes above the first flange portion 302a of the bottom section 302, on the outer peripheral edge of the first flange portion 302a, and radially inward. The cross section of the positioning portion 310 is formed in a substantially V-shape.

The bottom portion 302 is inserted into the lower end opening of the cylindrical body section 301 from below, and the upper portion of the first flange portion 302a of the bottom portion 302 abuts against the positioning portion 310, thereby positioning the bottom portion 302 with respect to the cylindrical body section 301. At this time, an annular gasket holding portion H3 is formed between the lower side of the positioning portion 310 of the cylindrical body section 301 and the outer peripheral surface of the annular rib 302d of the bottom portion 302 and on the lower side of the third flange portion 302 c. The annular packing 304 is held by the annular packing holding portion H3. The cross section of the annular gasket 304 is circular in a state where no pressure is applied from the periphery.

Further, an annular packing gland 303 is inserted from below between the inner peripheral surface of the cylindrical body portion 301 and the outer peripheral surface of the annular rib 302d of the bottom portion 302, and the annular packing gland 303 is attached to the bottom portion 302 by a screw 321. At this time, the screw 321 is fastened to the screw hole 322 of the bottom portion 302 from below, whereby the annular packing 304 is pressed by the upper end portion 303b of the annular packing gland 303. Thereby, the annular packing 304 is elastically deformed, and the annular packing 304 is biased radially outward with respect to the inner peripheral surface of the cylindrical body portion 301.

Fig. 20 shows a cross-sectional view of the lower end portion of the cylindrical body section 301, where L21 is a generatrix of the cylindrical surface of the region S21 extending downward from the positioning portion 310 of the cylindrical body section 301, and L22 is a generatrix of the conical surface of the region S22 below the region S21 of the cylindrical body section 301. As shown in fig. 20, L21 and L22 intersect on the same plane, and the angle formed by L21 and L22 is θ 2 (for example, about 1deg to 2 deg).

According to the third embodiment, the bottom portion 302 having an outer diameter substantially equal to the inner diameter of the lower cylindrical body section 301 can be assembled from below by making the region S21 corresponding to the plurality of flange portions 302a, 302b, 302c out of the region below the positioning portion 310 of the cylindrical body section 301 cylindrical, and therefore the cylindrical body section 301 and the bottom portion 302 can be assembled without a gap. Thus, the washing and dewatering tub can be manufactured with high roundness and high vibration accuracy, and vibration during dewatering caused by vibration of the washing and dewatering tub can be suppressed to be small.

Further, by providing the region S22 below the region S21 of the cylindrical body section 301 as a conical cylinder shape gradually expanding in diameter downward, the diameter of the opening for inserting the annular packing 304 into the cylindrical body section 301 from below is larger than the bottom portion 302, and thus workability is improved. This can improve the quality and shorten the production time.

The washing and dehydrating drum of the third embodiment has the same effects as the washing and dehydrating drum 100 of the first embodiment.

In the first to third embodiments, the vertical washing machine including the metal cylindrical body 101, 201, 301 having the non-porous peripheral wall has been described, but the present invention is not limited to this, and can be applied to a washing and dehydrating tub including the cylindrical body having a plurality of holes in the peripheral wall, and a washing machine including the washing and dehydrating tub.

In the first to third embodiments, the three flange portions 102a, 102b, and 102c are provided at intervals in the vertical direction over the entire outer peripheral surface of the bottom portion 102, but two flange portions may be provided on the outer peripheral surface of the bottom portion, or four or more flange portions may be provided.

In the first to third embodiments, the vertical washing machine having the washing and dewatering tub was described, but the present invention is not limited to this, and may be applied to a washing and drying machine having a drying function.

While specific embodiments of the present invention have been described, the present invention is not limited to the first to third embodiments, and various modifications can be made within the scope of the present invention. For example, the contents described in the first to third embodiments may be combined as appropriate as one embodiment of the present invention.

The present invention and embodiments will be summarized as follows.

A washing and dehydrating drum according to an aspect of the present invention includes:

metal cylindrical body sections 101, 201, 301;

synthetic resin bottom parts 102, 202, 302 arranged on the lower end side of the cylindrical body parts 101, 201, 301 and forming annular pad holding parts H1, H2, H3 between the bottom parts and the inner circumferential surfaces of the cylindrical body parts 101, 201, 301;

annular gaskets 104, 204, 304 held by the annular gasket holding portions H1, H2, H3 between the inner peripheral surfaces of the cylindrical body sections 101, 201, 301 and the outer peripheral surfaces of the bottom sections 102, 202, 302; and

an annular packing gland 103, 203, 303 attached to the bottom portion 102, 202, 302 so as to press the annular packing 104, 204, 304 held by the annular packing holding portion H1, H2, H3 from below through the upper end,

the bottom part 102, 202, 302 has a plurality of flange parts 102a, 102b, 102c, 202a, 202b, 202c, 302a, 302b, 302c provided at intervals in the vertical direction over the entire circumference of the outer peripheral surface,

the annular packing 104, 204, 304 is in contact with the lower surface of the lowermost flange portion 102c, 202c, 302c of the plurality of flange portions 102a, 102b, 102c, 202a, 202b, 202c, 302a, 302b, 302c,

and the upper end of the annular packing gland 103, 203, 303 presses the annular packing 104, 204, 304, thereby elastically deforming the annular packing 104, 204, 304.

According to the above configuration, the annular packing 104, 204, 304 of the annular packing holding portions H1, H2, H3 held between the inner peripheral surface of the cylindrical body portion 101, 201, 301 and the outer peripheral surface of the bottom portion 102, 202, 302 is pressed upward by the upper end of the annular packing gland 103, 203, 303 to be elastically deformed, whereby the annular packing 104, 204, 304 is biased radially outward with respect to the inner peripheral surface of the cylindrical body portion 101, 201, 301. This enables the inner circumferential surfaces of the tubular body sections 101, 201, and 301 to be brought into close contact with the annular gaskets 104, 204, and 304, thereby improving the water tightness between the inner circumferential surfaces of the tubular body sections 101, 201, and 301 and the annular gaskets 104, 204, and 304.

When the annular packing 104, 204, 304 is pressed upward by the upper end of the annular packing gland 103, 203, 303, the plurality of flange portions 102a, 102b, 102c, 202a, 202b, 202c, 302a, 302b, 302c provided at intervals in the vertical direction over the entire circumference of the outer peripheral surface of the bottom portion 102, 202, 302 restrict upward movement of the annular packing 104, 204, 304 in the axial direction, and therefore the annular packing 104, 204, 304 is in close contact with the lower surface of the lowermost flange portion 102c, 202c, 302 c. This can improve the water tightness between the lowermost flange portions 102c, 202c, 302c of the bottom portions 102, 202, 302 and the annular gaskets 104, 204, 304.

As described above, when the annular packing gland 103, 203, 303 is attached to the bottom portion 102, 202, 302 in a state where the annular packing 104, 204, 304 is fitted between the inner peripheral surface of the cylindrical body portion 101, 201, 301 and the outer peripheral surface of the bottom portion 102, 202, 302 and outside the outer peripheral surface of the bottom portion 102, 202, 302, the annular packing 104, 204, 304 is pressed against the annular packing 104, 204, 304 by the upper end of the annular packing gland 103, 203, 303, and the annular packing 104, 204, 304 can be easily elastically deformed, and the assembly property is good and the water tightness can be ensured.

Therefore, the water tightness between the metal cylindrical body sections 101, 201, and 301 and the synthetic resin bottom sections 102, 202, and 302 can be improved with a simple structure.

Further, by using the bottom portions 102, 202, 302 made of synthetic resin, cost reduction and weight reduction can be achieved. Further, the gap between the stirring blade (impeller) 20 and the bottom portions 102, 202, 302 can be easily optimized to prevent foreign matter such as coins from entering the gap between the stirring blade 20 and the bottom portions 102, 202, 302.

Further, since the annular spacers 104, 204, 304 are positioned by the lowermost flange portions 102c, 202c, 302c, the annular spacers 104, 204, 304 do not bulge upward, and the appearance can be maintained.

In addition, in the washing and dehydrating tub of one embodiment,

the positioning portions 110, 210, 310 are provided at the lower end portions of the tubular body sections 101, 201, 301, and the positioning portions 110, 210, 310 protrude above the uppermost flange portion 102a, 202a, 302a, among the plurality of flange portions 102a, 102b, 102c, 202a, 202b, 202c, 302a, 302b, 302c of the bottom portions 102, 202, 302 and radially inward of the outer peripheral edge of the flange portions 102a, 202a, 302 a.

According to the above-described embodiment, since the positioning portions 110, 210, 310 provided at the lower end portions of the tubular body portions 101, 201, 301 protrude toward the upper side of the uppermost flange portion 102a, 202a, 302b, 302a of the plurality of flange portions 102a, 102b, 102c, 202a, 202b, 202c, 302a, 302b, 302c of the bottom portions 102, 202, 302 and radially inward of the outer peripheral edge of the flange portions 102a, 202a, 302a, when the bottom portions 102, 202, 302 are arranged on the lower end side of the tubular body portions 101, 201, 301, the upper side of the uppermost flange portions 102a, 202a, 302a of the bottom portions 102, 202, 302 comes into contact with the positioning portions 110, 210, 310 of the tubular body portions 101, 201, 301, thereby positioning the bottom portions 102, 202, 302 with respect to the tubular body portions 101, 201, 301.

In addition, in the washing and dehydrating tub of one embodiment,

the cylindrical body part 201 is a conical cylinder in which the lower region S1 of the positioning part 210 is gradually expanded in diameter downward.

According to the above embodiment, the bottom portion in which the plurality of flange portions are provided over the entire outer peripheral surface is easily inserted into the cylindrical body section 201 by forming the region S1 below the positioning portion 210 of the cylindrical body section 201 into a conical cylindrical shape having a diameter gradually increasing downward, and workability is improved.

In addition, in the washing and dehydrating tub of one embodiment,

in the cylindrical body section 301, a region S21 corresponding to the plurality of flange portions 302a, 302b, and 302c in a region below the positioning portion 310 is cylindrical, and a region S22 below the cylindrical region is a conical cylinder whose diameter increases gradually downward.

According to the above embodiment, the bottom portion 302 having an outer diameter substantially equal to the inner diameter of the cylindrical body portion 301 can be assembled from below by making the region S21 corresponding to the plurality of flange portions 302a, 302b, 302c out of the region below the positioning portion 310 of the cylindrical body portion 301 cylindrical, and therefore the cylindrical body portion 301 and the bottom portion 302 can be assembled without a gap. Thus, the washing and dewatering tub can be manufactured with high roundness and high vibration accuracy, and vibration during dewatering caused by vibration of the washing and dewatering tub can be suppressed to be small.

Further, by making the lower region S22 of the cylindrical region S21 of the cylindrical body section 301 corresponding to the plurality of flange portions 302a, 302b, and 302c a conical tube shape gradually expanding in diameter downward, the diameter of the opening for inserting the annular packing 304 into the cylindrical body section 301 from below is wider than the bottom portion 302, and workability is improved. This can improve the quality and shorten the production time.

In addition, in the washing and dehydrating tub of one embodiment,

the bottom portion 102, 202, 302 has an annular rib 102d, 202d, 302d, and the annular rib 102d, 202d, 302d is provided to stand radially inward and downward with respect to the annular gasket 104, 204, 304 so as to position the annular gasket 104, 204, 304 together with the lower surface of the lowermost flange portion 102c, 202c, 302b, 302c of the plurality of flange portions 102a, 102b, 102c, 202a, 202b, 202c, 302a, 302b, 302 c.

According to the above embodiment, the annular ribs 102d, 202d, 302d are provided to stand radially inward and downward from the annular gaskets 104, 204, 304, so that the strength of the bottom portions 102, 202, 302 can be increased, and the annular gaskets 104, 204, 304 can be positioned by the outer peripheries of the annular ribs 102d, 202d, 302d together with the lower surfaces of the lowermost flange portions 102c, 202c, 302b, 302c of the plurality of flange portions 102a, 102b, 102c, 202a, 202b, 202c, 302a, 302b, 302 c.

In addition, in the washing machine, characterized in that,

the washing and dehydrating drum 100 is provided.

According to the above configuration, the washing machine including the washing and dehydrating tub 100 capable of improving the water tightness between the metal cylindrical body parts 101, 201, and 301 and the synthetic resin bottom parts 102, 202, and 302 can be realized with a simple configuration, and the reduction of the water saving performance can be prevented.

Description of the reference numerals

1: main body outer casing

2: water tank

4: upper cover

5: operation display unit

11: upper panel

12: base seat

20: stirring blade

40: ring-shaped balancer

50: clutch/brake mechanism

100: a washing and dewatering drum;

101. 201, 301: cylindrical fuselage section

102. 202, 302: a bottom;

102a, 202a, 302 a: a first flange portion;

102b, 202b, 302 b: a second flange portion;

102c, 202c, 302 c: a third flange portion;

102d, 202d, 302 d: an annular rib;

103. 203, 303: an annular gasket gland;

103a, 203a, 303 a: outer peripheral wall portion

103b, 203b, 303 b: an upper end portion;

103c, 203c, 303 c: annular bottom

103d, 203d, 303 d: inner peripheral wall portion

104. 204, 304: an annular gasket;

110. 210, 310: a positioning part;

121. 123, 221, 223, 321, 323: screw nail

122. 124, 222, 224, 322, 324: screw hole

H1, H2, H3: annular pad holding part

Claims (6)

1. A washing and dewatering tub, comprising:

a metal cylindrical body section;

a synthetic resin bottom portion disposed on a lower end side of the cylindrical body portion and forming an annular pad holding portion between the synthetic resin bottom portion and an inner peripheral surface of the cylindrical body portion;

an annular gasket held by the annular gasket holding portion between an inner peripheral surface of the cylindrical body portion and an outer peripheral surface of the bottom portion; and

an annular packing gland attached to the bottom portion so as to press the annular packing held by the annular packing holding portion from below through an upper end,

the bottom portion has a plurality of flange portions provided at intervals in the vertical direction over the entire circumference of the outer peripheral surface,

the annular gasket is in contact with a lower surface of a lowermost flange portion of the plurality of flange portions,

and the upper end of the ring-shaped packing gland presses the ring-shaped packing, so that the ring-shaped packing is elastically deformed.

2. The washing and dewatering tub according to claim 1,

a positioning portion is provided at a lower end portion of the cylindrical body portion, the positioning portion protruding radially inward of an outer peripheral edge of an uppermost flange portion of the plurality of flange portions of the bottom portion.

3. The washing and dewatering tub according to claim 2,

the cylindrical body part is a conical cylinder in which a lower region of the positioning part is gradually expanded in diameter downward.

4. The washing and dewatering tub according to claim 2,

in the cylindrical body portion, a region corresponding to the plurality of flange portions in a lower region of the positioning portion is cylindrical, and a lower region of the cylindrical region is a conical cylinder whose diameter is gradually increased downward.

5. The washing and dehydrating drum of any of claims 1 to 4,

the bottom portion has an annular rib that is provided to stand radially inward and downward with respect to the annular gasket so as to position the annular gasket together with a lower surface of a lowermost flange portion of the plurality of flange portions.

6. A washing machine is characterized in that a washing machine is provided,

a washing and dehydrating drum according to any one of claims 1 to 5.

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