JPWO2018220870A1 - Washing and dewatering tub and washing machine - Google Patents

Abstract

At the lower end side of the tubular body portion (101), a bottom portion (102) forming an annular packing holding portion (H1) with the inner peripheral surface of the tubular body portion (101) is arranged. To press the annular packing (104) held by the annular packing holding portion (H1) between the inner peripheral surface of the tubular body (101) and the outer peripheral surface of the bottom (102) from below at the upper end, Attach an annular packing retainer (103) to the bottom (102). Of the plurality of flange portions (102a, 102b, 102c) provided at intervals in the vertical direction over the entire outer peripheral surface of the bottom portion (102), the lowermost flange portion (102c) has an annular lower surface. The packing (104) abuts and the upper end of the ring-shaped packing retainer (103) presses the ring-shaped packing (104) to elastically deform the ring-shaped packing (104). This provides a washing / dehydrating tub with a simple structure that can improve the watertightness between the metal tubular body and the synthetic resin bottom.

Description

Inscription

  This application claims the benefit of priority to Japanese Patent Application No. 2017-107037 filed on May 30, 2017, and incorporates all the contents described in the Japanese application. Things.

  The present invention relates to a washing and dewatering tub and a washing machine.

  Conventionally, as a washing and dewatering tub, as disclosed in Japanese Patent No. 3078684 (Patent Document 1), a cylindrical body made of stainless steel plate and a peripheral edge of a lower end opening of the cylindrical body are attached. Some have a stainless steel bottom and are placed in the aquarium of the washing machine.

  The peripheral edge of the upper end opening of the bottom is bent inward into an inverted U-shape to form a goby fold. On the other hand, the peripheral edge of the lower end opening of the cylindrical body is bent outward in a U-shape to form a goby fold. By joining the goby fold at the bottom and the goby fold of the tubular body by goby fold caulking, and filling a sealing material between these goby folds, the lower end opening peripheral edge of the tubular body and Watertightness is achieved between the bottom and the peripheral edge of the upper opening.

  Further, since no through-hole is provided in the peripheral wall of the cylindrical body, water does not accumulate between the washing and dewatering tub and the water tub during the washing process. Thereby, the washing and dewatering tub can improve water saving performance.

Japanese Patent No. 3078684

  By the way, in the above-mentioned conventional washing and dewatering tub, since both the cylindrical body and the bottom are formed of a stainless steel plate, the use of a synthetic resin bottom in place of the stainless steel bottom reduces production costs. Can be lowered. That is, the conventional washing and dewatering tub has a problem that the cost has not been sufficiently reduced.

  However, if the bottom made of a synthetic resin is used instead of the bottom made of a stainless steel plate in order to solve the above problem, the following problem newly occurs.

  First, in order to use the bottom made of the synthetic resin, in order to ensure watertightness between the inner peripheral surface of the peripheral edge of the lower end opening of the cylindrical body and the outer peripheral surface of the bottom, an annular packing is provided over the entire periphery therebetween. Must be placed.

  However, in order to form the cylindrical body by bending the stainless steel plate, the distance between the inner peripheral surface of the lower edge opening peripheral portion and the outer peripheral surface of the bottom portion of the cylindrical body is made constant over the entire circumference. It is difficult. For this reason, there is a problem that a gap is formed between the peripheral edge of the lower end opening of the cylindrical body and the annular packing, and the watertightness between the cylindrical body and the bottom is reduced.

  As a result, if the washing and dewatering tub does not have a through hole in the peripheral wall of the cylindrical body, even if water is accumulated in the washing and dewatering tub during the washing step, the washing and dewatering tub and the water tub are opened through the gap. Since water leaks out in between, the water saving performance is reduced.

  Therefore, an object of the present invention is to provide a washing and dewatering tub capable of improving the water tightness between a metal cylindrical body and a synthetic resin bottom with a simple configuration, and a washing machine having the washing and dewatering tub. To provide.

The washing and dewatering tub according to one embodiment of the present invention includes:
A metal tubular body,
A bottom portion made of a synthetic resin that is arranged on a lower end side of the cylindrical body portion and forms an annular packing holding portion between the cylindrical body portion and an inner peripheral surface thereof,
An annular packing held by the annular packing holding portion between the inner peripheral surface of the cylindrical body and the outer peripheral surface of the bottom portion,
An annular packing retainer attached to the bottom portion so as to press the annular packing held by the annular packing holding portion from below at the upper end,
The bottom has a plurality of flanges provided at intervals in the vertical direction over the entire circumference of the outer peripheral surface,
While the annular packing is in contact with the lower surface of the lowermost flange portion of the plurality of flange portions,
The upper end of the annular packing retainer presses the annular packing to elastically deform the annular packing.

Further, a washing machine according to one embodiment of the present invention includes:
The washing and dewatering tub is provided.

  According to the present invention, the annular packing held by the packing holding portion between the inner peripheral surface of the metal cylindrical body and the outer peripheral surface of the synthetic resin bottom is raised by the upper end of the annular packing retainer. A washing and dewatering tub capable of improving the watertightness between a metal cylindrical body and a synthetic resin bottom with a simple structure by pressing and elastically deforming the same, and a washing machine having the washing and dewatering tub are realized. be able to.

FIG. 1 is an external perspective view of a vertical washing machine as an example of the washing machine according to the first embodiment of the present invention. FIG. 2 is a top view of the vertical washing machine. FIG. 3 is a vertical sectional view taken along line III-III in FIG. FIG. 4 is an enlarged longitudinal sectional view of a main part of FIG. FIG. 5 is a back view of the washing and dewatering tub. FIG. 6 is a vertical sectional view taken along line VI-VI in FIG. FIG. 7A is an enlarged cross-sectional view of a state where the annular packing in the region A of FIG. 6 is not mounted. FIG. 7B is an enlarged cross-sectional view of the state where the annular packing in the region A of FIG. 6 is mounted. FIG. 8A is an enlarged cross-sectional view of a state where the annular packing in a region B of FIG. 6 is not mounted. FIG. 8B is an enlarged cross-sectional view showing a state where the annular packing in a region B of FIG. 6 is mounted. FIG. 9 is an exploded perspective view of the washing and dewatering tub. FIG. 10 is a perspective view of the annular packing press of the washing and dewatering tub. FIG. 11 is a top view of the annular packing retainer. FIG. 12 is a side view of the annular packing retainer. FIG. 13 is a longitudinal sectional view taken along line XIII-XIII in FIG. FIG. 14 is a perspective view of the bottom of the washing and dewatering tub as viewed obliquely from below. FIG. 15 is an enlarged sectional view of a main part of a washing and dewatering tub of a vertical washing machine as an example of the washing machine according to the second embodiment of the present invention. FIG. 16 is an enlarged sectional view of a main part of the washing and dewatering tub. FIG. 17 is a cross-sectional view of the lower end of the cylindrical body of the washing and dewatering tub. FIG. 18 is an enlarged sectional view of a main part of a washing and dewatering tub of a vertical washing machine as an example of the washing machine according to the third embodiment of the present invention. FIG. 19 is an enlarged sectional view of a main part of the washing and dewatering tub. FIG. 20 is a sectional view of the lower end of the cylindrical body of the washing and dewatering tub.

  Hereinafter, a washing and dewatering tub and a 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 an obliquely upper front side, and FIG. 2 is a top view of the vertical washing machine.

  As shown in FIGS. 1 and 2, the vertical washing machine of the first embodiment includes a main body casing 1 made of metal or synthetic resin, a water tub 2 (shown in FIG. 3), and a washing and dewatering tub 100 (FIG. 3). ), And an operation display unit 5 provided on the upper surface of the main casing 1. The user operates the operation display unit 5 to select a driving operation. In addition, the operation display unit 5 displays the operation state using characters and numerals.

  FIG. 3 is a longitudinal sectional view taken along line III-III in FIG.

  In this vertical washing machine, as shown in FIG. 3, the main body casing 1 is formed in a rectangular tube shape, and has an upper surface opening on the upper surface and a lower surface opening on the lower surface. An upper surface plate 11 made of synthetic resin and provided with an operation display unit 5 and the like is fixed to an upper surface opening of the main body casing 1. A base 12 made of synthetic resin is fixed to an opening on the lower surface of the main casing 1.

  A laundry inlet 1a for introducing laundry into the vertical washing machine is provided in the upper plate 11. The upper lid 4 for opening and closing the laundry inlet 1a is rotatably supported by the upper surface plate 11 on the inner side (rear side) of the vertical washing machine. By rotating the upper lid 4 up and down, the laundry inlet 1a is opened and closed.

  A water tub 2 is disposed in the main body casing 1, and a washing and dewatering tub 100 is disposed in the water tub 2. That is, the main body casing 1 houses the washing and dewatering tub 100 and the water tub 2 that houses the washing and dewatering tub 100. In the washing and dewatering tub 100, water for washing the laundry or water for rinsing the laundry is accumulated. The water tub 2 and the washing and dewatering tub 100 each have a bottomed cylindrical shape with an open upper side, and have central axes parallel to the vertical direction. The central axis of the water tub 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 annular balancer 40 functions to suppress vibration when the washing and dewatering tub 100 is rotated at a high speed for dehydrating the laundry. Further, a stirring blade (pulsator) 20 made of a synthetic resin is rotatably arranged 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 / dewatering tub 100 and the stirring blade 20 are provided below the water tub 2. The center 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.

  Further, the vertical washing machine includes a water supply unit 10 for supplying water into the washing / dewatering tub 100.

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

  As shown in FIG. 4, the washing and dewatering tub 100 includes a cylindrical body 101 made of metal (for example, stainless steel) and a bottom made of synthetic resin (for example, plastic) disposed at the lower end of the cylindrical body 101. 102. The cylindrical body 101 has a dewatering drainage hole 101d (shown in FIG. 9) above the water level at the time of washing, and has a peripheral wall whose diameter increases toward the upper side (see FIG. 6). The bottom portion 102 has a cup shape in which a concave portion for accommodating the stirring blade 20 is formed.

  A plurality of drain grooves (not shown) extending in the up-down direction are provided on the inner peripheral surface of the cylindrical body 101. When the washing and dewatering tub 100 rotates at a high speed during the dehydrating operation, the water in the washing and dewatering tub 100 receives centrifugal force and rises along the inner peripheral surface of the washing and dewatering tub 100. At this time, the water rising along the inner peripheral surface of the washing and dewatering tub 100 is guided by a drainage groove into a gap (not shown) provided at an upper portion thereof, and is discharged from the gap and the dewatering drainage hole 101d. 2 and between the washing and dewatering tub 100.

  The peripheral wall of the cylindrical body 101 is a conical non-porous wall that is inclined with respect to the central axis of the washing and dewatering tub 100. The cylindrical body 101 is formed by cutting a thin plate made of, for example, stainless steel (thickness: 0.5 to 0.6 mm) into a fan shape, and then forming the conical body by a roll forming process. It is formed into a tubular shape by joining a rolled seam portion by goby folding caulking as a plate material.

  FIG. 5 shows a back view of the washing and dewatering tub 100. 5, the same components as those in FIGS. 3 and 4 are denoted by the same reference numerals.

  FIG. 6 is a longitudinal sectional view taken along line VI-VI of FIG. A region A (dotted circle portion) shown in FIG. 6 shows a portion where an annular packing holder 103 (shown in FIG. 7A) is fixed to the bottom 102 with a screw, and a region B (dotted circle portion) shown in FIG. 8 shows a portion where the cylindrical body portion 101 is fixed to the bottom portion 102 with a screw through an annular packing retainer 103 (shown in FIG. 8A).

  7A shows an enlarged sectional view of the region A in FIG. 6 (without the annular packing 104), and FIG. 7B shows an enlarged sectional view of the state where the annular packing 104 in the region A of FIG. 7A and 7B, reference numeral 103a denotes an outer peripheral wall portion, 103b denotes an upper end portion, 103c denotes an annular bottom portion, and 103d denotes an inner peripheral wall portion (see FIG. 10).

  As shown in FIGS. 7A and 7B, a first flange portion 102a is provided over the entire outer peripheral surface of the upper end portion of the bottom portion 102. Further, a second flange portion 102b is provided over the entire periphery at a predetermined interval below the first flange portion 102a on the outer peripheral surface of the bottom portion 102. In addition, a third flange portion 102c is provided over the entire circumference at a predetermined interval below the second flange portion 102b on the outer peripheral surface of the bottom portion 102. Further, an annular rib 102d extending downward from the root side of the third flange portion 102c of the bottom portion 102 is provided upright (see FIG. 14).

  At the lower end of the cylindrical body 101, a positioning portion 110 is provided over the entire circumference at a position above the first flange portion 102a of the bottom portion 102 and radially inward of the outer peripheral edge of the first flange portion 102a. Have been. The cross section of the positioning portion 110 has a substantially V shape.

  The bottom 102 is inserted from below into the lower end opening of the cylindrical body 101, and the upper portion of the first flange 102 a of the bottom 102 abuts the positioning portion 110 to position the bottom 102 with respect to the cylindrical body 101. doing. At this time, an annular packing holding portion H1 is formed between the lower side of the positioning portion 110 of the cylindrical body portion 101 and the outer peripheral surface of the annular rib 102d of the bottom portion 102 and below the third flange portion 102c. Is done. The annular packing 104 is held by the annular packing holding portion H1. The cross section of the annular packing 104 is circular (in a state where pressure is not applied from the periphery). Note that the cross-sectional shape of the annular packing 104 is not limited to a circular shape, and may be appropriately set according to the configuration of the cylindrical body and the bottom.

  Then, between the inner peripheral surface of the cylindrical body 101 and the outer peripheral surface of the annular rib 102d of the bottom 102, an annular packing retainer 103 is inserted from below, and the annular packing retainer 103 is screwed to the bottom 102 with a screw 121. Attach. At this time, the annular packing 104 is pressed by the upper end 103b of the annular packing retainer 103 by tightening the screw 121 into the screw hole 122 of the bottom 102 from below. As a result, the annular packing 104 is elastically deformed, and the annular packing 104 is urged radially outward with respect to the inner peripheral surface of the cylindrical body 101. The upper end portion 103b of the annular packing retainer 103 has a substantially flat shape, and is chamfered over the entire inner circumference and the outer circumference.

  A plurality of places to be tightened by the screw 121 are provided at equal intervals in the circumferential direction on the annular packing holder 103, and the upper end of the annular packing holder 103 uniformly presses the annular packing 104.

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

  As described above, the annular packing 104 is elastically deformed by tightening the screw 121 for attaching the annular packing retainer 103 to the bottom portion 102 and simultaneously pressing the annular packing 104 at the upper end of the annular packing retainer 103, thereby forming the cylindrical packing 104 into a cylindrical shape. Since the annular packing 104 urges the inner peripheral surface of the body portion 101 radially outward, assemblability is improved.

  On the other hand, FIG. 8A shows an enlarged sectional view of the region B of FIG. 6 (without the annular packing 104), and FIG. 8B shows an enlarged sectional view of the state where the annular packing 104 of the region B of FIG. I have. 8A and 8B, the same components as those in FIG. 7A are denoted by the same reference numerals.

  As shown in FIGS. 8A and 8B, the bottom 102 is attached to the lower end of the cylindrical body 101 by a screw 123 via an annular packing retainer 103. At this time, by fixing 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, a fixing part of the bottom part 102 is provided near the annular packing 104 at the lower end side of the cylindrical body part 101. Thus, the annular packing retainer 103 can be used also for fixing the cylindrical body 101 and the bottom 102. A plurality of places to be tightened by the screws 123 are provided at equal intervals in the circumferential direction on the lower end side of the tubular body 101.

  In the washing and spin-drying tub 100 having the above-described configuration, of the plurality of flange portions 102a, 102b, and 102c provided over the entire outer peripheral surface of the bottom portion 102 and spaced apart in the vertical direction, the upper flange portion 102a has a cylindrical shape. It is used for positioning of the body part 101 with respect to the positioning part 110. Further, of the plurality of flange portions 102a, 102b, 102c, the lower flange portion 102c is used for positioning the annular packing 104. Further, the intermediate flange portion 102b is used to reinforce the strength of the bottom portion 102.

  Further, a plurality of flange portions 102a, 102b, 102c are provided on the outer peripheral surface of the bottom portion 102 at intervals in the vertical direction, and the flange portion 102c for positioning the annular packing 104 is disposed below, so that the annular packing 104 is formed. Can be lowered. Accordingly, the vertical dimension of the annular packing retainer 103 can be reduced, the insertion of the annular packing retainer 103 becomes easy, and the annular packing 104 can be strongly and uniformly pressed, thereby improving the sealing performance. .

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

  Next, after the annular packing retainer 103 is attached to the bottom portion 102 by tightening the screw 121 (shown in FIG. 7A) from below, the annular packing retainer 103 is tightened from the radial outside by tightening the screw 123 (shown in FIG. 8A). The cylindrical body 101 and the bottom 102 are fixed via 103.

  FIG. 10 is a perspective view of the annular packing holder 103 of the washing and dewatering tub 100, and FIG. 11 is a top view of the annular packing holder 103. As shown in FIGS. 10 and 11, the annular packing retainer 103 has a short cylindrical outer peripheral wall 103a, an upper end 103b provided at an upper end of the outer peripheral wall 103a, and a lower end of the outer peripheral wall 103a. An annular bottom portion 103c provided over the entire inner peripheral surface of the side, a short cylindrical inner peripheral wall portion 103d provided over the entire inner peripheral side of the annular bottom portion 103c, and an inner peripheral surface of the outer peripheral wall portion 103a. It has a plurality of ribs 103e connecting between the inner peripheral wall portion 103d and the outer peripheral surface. 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 103a.

  A plurality of first screw holes 103f are provided at intervals in the circumferential direction of the outer peripheral wall 103a. This first screw hole portion 103f has a screw hole 124 shown in FIG. 8A. The annular bottom portion 103c is provided with a plurality of second screw holes 103g at intervals in the circumferential direction. The second screw hole portion 103g has a screw hole 122 shown in FIG. 7A.

  FIG. 12 is a side view of the annular packing retainer 103, and FIG. 13 is a longitudinal sectional view taken along line XIII-XIII in FIG. Is shown. 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 dewatering tub 100 as viewed obliquely from below. 14, the same components as those in FIGS. 7A and 8A are denoted by the same reference numerals.

  As shown in FIG. 14, a first flange portion 102a, a second flange portion 102b, and a third flange portion 102c are provided at intervals in the vertical direction over the entire outer peripheral surface of the upper end portion of the bottom portion 102. Further, an annular rib 102d extending downward from the root side of the third flange portion 102c of the bottom portion 102 is provided upright.

  According to the washing and dewatering tub 100 having the above-described configuration, the annular packing 104 held by the annular packing holding portion H1 between the inner peripheral surface of the cylindrical body 101 and the outer peripheral surface of the bottom 102 is replaced with the annular packing. By pressing upward at the upper end of the presser 103 to elastically deform it, the annular packing 104 urges the inner peripheral surface of the cylindrical body 101 radially outward. Thus, the inner peripheral surface of the cylindrical body 101 can be brought into close contact with the annular packing 104, and the watertightness between the inner peripheral surface of the cylindrical body 101 and the annular packing 104 can be improved.

  Further, when the annular packing 104 is pressed upward by the upper end of the annular packing retainer 103, a plurality of flange portions 102a, 102b, 102c provided at intervals in the vertical direction over the entire outer peripheral surface of the bottom portion 102. Of these, the lowermost flange portion 102c regulates the upward movement of the annular packing 104 in the axial direction, so that the annular packing 104 adheres to the lower surface of the third flange portion 102c. Thereby, the watertightness between the lowermost flange portion 102c of the bottom portion 102 and the annular packing 104 can be improved.

  In this manner, with the annular packing 104 being externally fitted between the inner peripheral surface of the cylindrical body 101 and the outer peripheral surface of the bottom 102 and the outer peripheral surface of the bottom 102, the annular packing retainer 103 is attached to the bottom 102. At the time of attachment, by pressing the annular packing 104 against the annular packing 104 at the upper end, the annular packing 104 can be easily elastically deformed, and watertightness can be secured with good assembling property.

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

  By using the synthetic resin bottom 102, the cost can be reduced and the weight can be reduced. Further, the gap between the stirring blade 20 and the bottom 102 can be easily optimized so that foreign matter such as a coin can be prevented from entering the gap between the stirring blade (pulsator) 20 and the bottom 102.

  A side-to-side (outside diameter) slide die structure for the screw holes of the cylindrical body 101 and the bottom 102 of the washing and spin-drying tub 100 is required. Since a sufficient distance can be secured between the lower surface of the second flange 102a and the upper surface of the third flange portion 102c, a slide mold structure having no problem in strength can be manufactured. Therefore, since the first flange portion 102a and the third flange portion 102c can be formed by a vertical die, it is possible to manufacture a die having an accurate diameter and no step difference between the die. Then, the washing and dewatering tub 100 with high roundness and low vibration and good quality, and the washing and dewatering tub 100 with high sealing performance with the packing 104 without step and high water saving performance can be manufactured.

  On the other hand, if there is only one flange at the bottom, the slide die structure for the screw hole cannot be formed in a state in which there is no problem in strength and structure, and the roundness around the flange is reduced. At the same time, there is a problem that a step is formed in the seal portion, the sealability is reduced, and the quality is reduced.

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

  The positioning portion 110 provided at the lower end portion of the cylindrical body portion 101 is located above the uppermost flange portion 102a of the plurality of flange portions 102a, 102b, and 102c of the bottom portion 102 and the flange portion 102a. When the bottom 102 is disposed at the lower end side of the cylindrical body 101 by projecting radially inward from the outer peripheral edge of the cylindrical body 101, the upper side of the uppermost flange 102 a of the bottom 102 is positioned with respect to the cylindrical body 101. The bottom portion 102 can be positioned with respect to the cylindrical body portion 101 by abutting on the portion 110.

  Also, by making the region below the positioning portion 110 of the cylindrical body 101 a cylindrical shape, the bottom 102 having an outer diameter substantially the same as the inner diameter of the cylindrical body 101 can be assembled from below, The tubular body 101 and the bottom 102 can be assembled without any gap. This makes it possible to produce the washing / dewatering tub 100 with high roundness and high accuracy of run-out, and it is possible to suppress the vibration at the time of spin-drying caused by the run-out of the washing / dewatering tub 100.

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

  Further, it is possible to realize a vertical washing machine having a washing and dewatering tub 100 that can improve the watertightness of the metal cylindrical body 101 and the synthetic resin bottom 102 with a simple configuration, and achieves water saving performance. Drop can be prevented.

  In the first embodiment, the annular packing holder 103 having the substantially flat upper end 103b is used. However, the shape of the upper end of the annular packing holder is not limited to this, and the annular packing 104 may be elastically deformed. Any shape may be used.

[Second embodiment]
FIG. 15 is an enlarged sectional view (corresponding to an area A shown in FIG. 6) of a main part of a washing and dewatering tub of a vertical washing machine as an example of the washing machine according to the second embodiment of the present invention. Shows an enlarged sectional view (corresponding to a region B shown in FIG. 6) of a main part of the washing and dewatering tub of the vertical washing machine. 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 a cylindrical body 201, a bottom 202, an annular packing holder 203 and the like. 1 to 6 are referred to.

  As shown in FIGS. 15 and 16, the washing and dewatering tub of the second embodiment moves a region S1 (shown in FIG. 17) below the positioning portion 210 of the cylindrical body 201 downward. It has a conical cylinder shape whose diameter gradually increases.

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

  At the lower end of the cylindrical body 201, a positioning portion 210 is provided over the entire circumference at a position higher than the first flange portion 202a of the bottom portion 202 and radially inward of the outer peripheral edge of the first flange portion 202a. Have been. The cross section of the positioning portion 210 has a substantially V shape.

  The bottom 202 is inserted from below into the lower end opening of the cylindrical body 201, and the upper part of the first flange 202 a of the bottom 202 abuts on the positioning part 210, and the bottom 202 is positioned with respect to the cylindrical body 201. doing. At this time, an annular packing holding portion H2 is formed between the lower side of the positioning portion 210 of the cylindrical body portion 201 and the outer peripheral surface of the annular rib 202d of the bottom portion 202 and below the third flange portion 202c. Is done. The annular packing 204 is held by the annular packing holding portion H2. The cross section of the annular packing 204 is circular in a state where pressure is not applied from the periphery.

  Then, between the inner peripheral surface of the cylindrical body 201 and the outer peripheral surface of the annular rib 202d of the bottom 202, an annular packing retainer 203 is inserted from below, and the annular packing retainer 203 is screwed to the bottom 202 with a screw 221. Attach. At this time, the annular packing 204 is pressed by the upper end 203b of the annular packing holder 203 by tightening the screw 221 into the screw hole 222 of the bottom 202 from below. Accordingly, the annular packing 204 is elastically deformed, and the annular packing 204 is urged radially outward with respect to the inner peripheral surface of the cylindrical body 201.

  FIG. 17 is a cross-sectional view of the lower end of the cylindrical body 201, L1 is a generating line of a virtual cylindrical surface extending downward from the positioning portion 210 of the cylindrical body 201, and L2 is the cylindrical body 201. Is the generatrix of the conical cylinder surface in the region S1 below the positioning portion 210. As shown in FIG. 17, L1 and L2 intersect on the same plane, and the angle between L1 and L2 is θ1 (for example, about 1 deg to 2 deg).

  According to the second embodiment, the region S1 below the positioning portion 210 of the cylindrical body 201 is formed in a conical cylindrical shape whose diameter gradually increases downward, so that a plurality of regions S1 are formed over the entire outer peripheral surface. The bottom portion 202 provided with the flange portions 202a, 202b, and 202c is easily inserted into the cylindrical body portion 201, and workability is improved.

  The washing and dewatering tub of the second embodiment has the same effect as the washing and dewatering tub 100 of the first embodiment.

[Third embodiment]
FIG. 18 is an enlarged sectional view (corresponding to an area A shown in FIG. 6) of a main part of a washing and dewatering tub of a vertical washing machine as an example of the washing machine according to the second embodiment of the present invention. Shows an enlarged sectional view (corresponding to a region B shown in FIG. 6) of a main part of the washing and dewatering tub of the vertical washing machine. 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 a cylindrical body 301 and a bottom 302, an annular packing holder 303, and the like. 1 to 6 are referred to.

  As shown in FIGS. 18 and 19, the washing and dewatering tub of the third embodiment includes a plurality of flange portions 302a, 302b, and 302c in a region below the positioning portion 310 of the cylindrical body 301. The corresponding area S21 (shown in FIG. 20) has a cylindrical shape. In addition, a region S22 below the region S21 (shown in FIG. 20) of the region below the positioning portion 310 of the cylindrical body 301 has a conical cylindrical shape whose diameter gradually increases 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 over the entire circumference at a predetermined interval below the first flange portion 302a on the outer peripheral surface of the bottom portion 302. In addition, a third flange portion 302c is provided on the entire circumference at a predetermined interval below the second flange portion 302b on the outer peripheral surface of the bottom portion 302. Further, an annular rib 302d extending downward from the root side of the third flange portion 302c of the bottom portion 302 is provided upright.

  At the lower end of the cylindrical body 301, a positioning portion 310 is provided over the entire circumference at a position above the first flange portion 302a of the bottom portion 302 and protruding radially inward from the outer peripheral edge of the first flange portion 302a. Have been. The cross section of the positioning portion 310 has a substantially V shape.

  The bottom 302 is inserted from below into the lower end opening of the cylindrical body 301, and the upper portion of the first flange 302 a of the bottom 302 abuts the positioning portion 310 to position the bottom 302 with respect to the cylindrical body 301. doing. At this time, an annular packing holding portion H3 is formed between the lower side of the positioning portion 310 of the cylindrical body portion 301 and the outer peripheral surface of the annular rib 302d of the bottom portion 302 and below the third flange portion 302c. Is done. The annular packing 304 is held by the annular packing holding portion H3. The cross section of this annular packing 304 is circular in a state where pressure is not applied from the periphery.

  Then, between the inner peripheral surface of the cylindrical body 301 and the outer peripheral surface of the annular rib 302 d of the bottom 302, an annular packing retainer 303 is inserted from below, and the annular packing retainer 303 is screwed to the bottom 302 with a screw 321. Attach. At this time, by tightening the screw 321 into the screw hole 322 of the bottom 302 from below, the annular packing 304 is pressed by the upper end 303 b of the annular packing holder 303. As a result, the annular packing 304 is elastically deformed, and the annular packing 304 is urged radially outward with respect to the inner peripheral surface of the cylindrical body 301.

  FIG. 20 is a cross-sectional view of the lower end portion of the cylindrical body 301, L21 is a generating line of the cylindrical surface of the region S21 extending downward from the positioning portion 310 of the cylindrical body 301, and L22 is the cylindrical body. It is the generatrix of the conical cylindrical surface of the area S22 below the area S21 of the portion 301. As shown in FIG. 20, L21 and L22 intersect on the same plane, and the angle between L21 and L22 is θ2 (for example, about 1 deg to 2 deg).

  According to the third embodiment, in the region below the positioning portion 310 of the cylindrical body 301, the region S21 corresponding to the plurality of flange portions 302a, 302b, and 302c is formed in a cylindrical shape. Since the bottom 302 having an outer diameter substantially the same as the inner diameter of the cylindrical body 301 can be assembled from below, the cylindrical body 301 and the bottom 302 can be assembled without any gap. This makes it possible to create a washing and dewatering tub with high roundness and high accuracy of run-out, and it is possible to reduce vibration during dehydration caused by run-out of the washing and dewatering tub.

  Also, by forming a region S22 below the region S21 of the cylindrical body 301 into a conical cylindrical shape whose diameter gradually increases downward, the annular packing 304 is inserted into the cylindrical body 301 from below. Since the diameter of the opening for insertion is larger than that of the bottom portion 302, workability is improved. This makes it possible to improve the quality and shorten the production time.

  The washing and dewatering tub of the third embodiment has the same effect as the washing and dewatering tub 100 of the first embodiment.

  In the first to third embodiments, the vertical washing machine including the metal cylindrical body portions 101, 201, and 301 each having a non-perforated peripheral wall has been described. However, the present invention is not limited thereto. The present invention may be applied to a washing and dewatering tub having a cylindrical body having holes and a washing machine having the washing and dewatering tub.

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

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

  Although the specific embodiments of the present invention have been described, the present invention is not limited to the above-described first to third embodiments, and can be implemented with various modifications within the scope of the present invention. For example, an embodiment of the present invention may be a combination of the contents described in the first to third embodiments as appropriate.

  The present invention and embodiments are summarized as follows.

The washing and dewatering tub according to one embodiment of the present invention includes:
A metal cylindrical body 101, 201, 301;
Synthetic resin disposed at the lower end side of the cylindrical body portions 101, 201, 301 to form annular packing holding portions H1, H2, H3 between the cylindrical body portions 101, 201, 301 and the inner peripheral surface thereof. Bottoms 102, 202, 302 made of
Annular packings 104, 204 held by the annular packing holding portions H1, H2, H3 between the inner peripheral surfaces of the cylindrical body portions 101, 201, 301 and the outer peripheral surfaces of the bottom portions 102, 202, 302. , 304,
The annular packing retainers 103, attached to the bottoms 102, 202, 302 so as to press the annular packings 104, 204, 304 held by the annular packing holding portions H1, H2, H3 from below at the upper end. 203, 303,
The bottom portions 102, 202, 302 have a plurality of flange portions 102a, 102b, 102c, 202a, 202b, 202c, 302a, 302b, 302c provided at intervals in the vertical direction all around the outer peripheral surface. ,
The annular packings 104, 204, 304 are applied to 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. In contact with
The upper ends of the annular packing retainers 103, 203, 303 press the annular packings 104, 204, 304 to elastically deform the annular packings 104, 204, 304.

  According to the above configuration, the annular packing held by the annular packing holding portions H1, H2, H3 between the inner peripheral surfaces of the cylindrical body portions 101, 201, 301 and the outer peripheral surfaces of the bottom portions 102, 202, 302. 104, 204, 304 are pressed upward at the upper ends of the annular packing retainers 103, 203, 303 and elastically deformed, so that the annular packing 104, 304, 304 is pressed against the inner peripheral surface of the cylindrical body 101, 201, 301. 204, 304 urge radially outward. Thereby, the inner peripheral surfaces of the cylindrical body portions 101, 201, 301 can be brought into close contact with the annular packings 104, 204, 304, and the inner peripheral surface of the cylindrical body portions 101, 201, 301 and the annular packing 104 can be formed. , 204, 304 can be improved.

  Also, when the annular packings 104, 204, 304 are pressed upward at the upper ends of the annular packing retainers 103, 203, 303, they are spaced around the entire outer peripheral surface of the bottom portions 102, 202, 302 and vertically. The lowermost flange portion 102c, 202c, 302c of the plurality of provided flange portions 102a, 102b, 102c, 202a, 202b, 202c, 302a, 302b, 302c is the shaft of the annular packing 104, 204, 304. Since the upward movement in the direction is regulated, the annular packings 104, 204, 304 are in close contact with the lower surfaces of the lowermost flange portions 102c, 202c, 302c. Thereby, the water tightness between the lowermost flange portions 102c, 202c, 302c of the bottom portions 102, 202, 302 and the annular packings 104, 204, 304 can be improved.

  As described above, the annular packings 104, 204, 304 are provided between the inner peripheral surfaces of the cylindrical body portions 101, 201, 301 and the outer peripheral surfaces of the bottom portions 102, 202, 302 and on the outer peripheral surfaces of the bottom portions 102, 202, 302. When the annular packing retainers 103, 203, 303 are attached to the bottom portions 102, 202, 302 in the state of being fitted, the annular packings 104, 204, 304 are pressed against the annular packings 104, 204, 304 at the upper end. Thus, the annular packings 104, 204, 304 can be easily elastically deformed, and watertightness can be secured with good assembling property.

  Therefore, the watertightness between the metal cylindrical body portions 101, 201, 301 and the synthetic resin bottom portions 102, 202, 302 can be improved with a simple configuration.

  By using the synthetic resin bottom portions 102, 202, 302, the cost can be reduced and the weight can be reduced. Further, the gap between the stirring blade 20 and the bottom portions 102, 202, 302 can be easily optimized so that foreign substances such as coins can be prevented from entering the gap between the stirring blade (pulsator) 20 and the bottom portions 102, 202, 302. .

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

Further, in the washing and dewatering tub of one embodiment,
At the lower end of the cylindrical body 101, 201, 301, the most of the plurality of flanges 102a, 102b, 102c, 202a, 202b, 202c, 302a, 302b, 302c of the bottoms 102, 202, 302 is provided. Positioning portions 110, 210, 310 are provided above the upper flange portions 102a, 202a, 302a and projecting radially inward from the outer peripheral edges of the flange portions 102a, 202a, 302a.

  According to the above embodiment, the positioning portions 110, 210, 310 provided at the lower end portions of the cylindrical body portions 101, 201, 301 are provided with the plurality of flange portions 102a, 102b, 102c, 202a of the bottom portions 102, 202, 302. , 202b, 202c, 302a, 302b, and 302c, by protruding above the uppermost flange portions 102a, 202a, and 302a and radially inward of the outer peripheral edges of the flange portions 102a, 202a, and 302a. When the bottoms 102, 202, 302 are arranged at the lower ends of the cylindrical trunks 101, 201, 301, the upper side of the uppermost flanges 102a, 202a, 302a of the bottoms 102, 202, 302 is positioned above the cylindrical trunk 101. , 201, 301, the bottom portions 102, 202, 302 are positioned relative to the cylindrical body portions 101, 201, 301. Can be set.

Further, in the washing and dewatering tub of one embodiment,
The cylindrical body portion 201 has a conical cylindrical shape in which a region S1 below the positioning portion 210 gradually increases in diameter downward.

  According to the above-described embodiment, the region S1 below the positioning portion 210 of the cylindrical body portion 201 is formed in a conical cylindrical shape whose diameter gradually increases downward, so that a plurality of flange portions are provided over the entire outer peripheral surface. Is easily inserted into the cylindrical body 201, and workability is improved.

Further, in the washing and dewatering tub of one embodiment,
In the cylindrical body portion 301, a region S21 corresponding to the plurality of flange portions 302a, 302b, and 302c in a region below the positioning portion 310 has a cylindrical shape, and the region S21 is lower than the cylindrical shape region. The side region S22 has a conical cylindrical shape whose diameter gradually increases downward.

  According to the above-described embodiment, by forming the region S21 corresponding to the plurality of flange portions 302a, 302b, and 302c in the region below the positioning portion 310 of the cylindrical body portion 301 into a cylindrical shape, the cylindrical body portion is formed. Since the bottom 302 having an outer diameter substantially equal to the inner diameter of the portion 301 can be assembled from below, the cylindrical body 301 and the bottom 302 can be assembled without any gap. This makes it possible to create a washing and dewatering tub with high roundness and high accuracy of run-out, and it is possible to reduce vibration during dehydration caused by run-out of the washing and dewatering tub.

  In addition, by forming a region S22 below the cylindrical region S21 corresponding to the plurality of flange portions 302a, 302b, 302c of the cylindrical body portion 301 into a conical cylindrical shape whose diameter gradually increases downward, Since the diameter of the opening for inserting the annular packing 304 into the cylindrical body 301 from below is larger than that of the bottom 302, workability is improved. This makes it possible to improve the quality and shorten the production time.

Further, in the washing and dewatering tub of one embodiment,
The bottom portions 102, 202, 302 are formed in the annular shape together 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. In order to position the packings 104, 204, 304, there are provided annular ribs 102d, 202d, 302d erected radially inward and downward with respect to the annular packings 104, 204, 304.

  According to the above-described embodiment, the annular ribs 102d, 202d, and 302d are provided on the bottoms 102, 202, and 302 so as to be radially inward and downward with respect to the annular packings 104, 204, and 304, respectively. , 202, 302 together 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, The annular packings 104, 204, 304 can be positioned on the outer peripheral surfaces of the annular ribs 102d, 202d, 302d.

Also, in this washing machine,
The washing and dewatering tub 100 is provided.

  According to the above configuration, the washing machine having the washing and dewatering tub 100 capable of improving the watertightness between the metal cylindrical body portions 101, 201, 301 and the synthetic resin bottom portions 102, 202, 302 with a simple configuration. Can be realized, and a decrease in water saving performance can be prevented.

DESCRIPTION OF SYMBOLS 1 ... Main body casing 2 ... Water tank 4 ... Top lid 5 ... Operation display part 11 ... Top plate 12 ... Base 20 ... Stirring blade 40 ... Annular balancer 50 ... Clutch / brake mechanism 100 ... Washing and dewatering tank 101,201,301 ... Cylinder -Shaped body portions 102, 202, 302 ... bottom portions 102a, 202a, 302a ... first flange portions 102b, 202b, 302b ... second flange portions 102c, 202c, 302c ... third flange portions 102d, 202d, 302d ... annular ribs 103 , 203, 303 ... annular packing retainer 103a, 203a, 303a ... outer peripheral wall 103b, 203b, 303b ... upper end 103c, 203c, 303c ... annular bottom 103d, 203d, 303d ... inner peripheral wall 104, 204, 304 ... annular Packings 110, 210, 310 ... positioning parts 121, 123, 221, 223, 321, 23 ... Screw 122,124,222,224,322,324 ... screw holes H1, H2, H3 ... annular packing holding portion

Claims (6)

A metal tubular body,
A bottom portion made of a synthetic resin that is arranged on a lower end side of the cylindrical body portion and forms an annular packing holding portion between the cylindrical body portion and an inner peripheral surface thereof,
An annular packing held by the annular packing holding portion between the inner peripheral surface of the cylindrical body and the outer peripheral surface of the bottom portion,
An annular packing retainer attached to the bottom portion so as to press the annular packing held by the annular packing holding portion from below at the upper end,
The bottom has a plurality of flanges provided at intervals in the vertical direction over the entire circumference of the outer peripheral surface,
While the annular packing is in contact with the lower surface of the lowermost flange portion of the plurality of flange portions,
A washing and dewatering tub, wherein an upper end of the annular packing retainer presses the annular packing to elastically deform the annular packing. The washing and dewatering tub according to claim 1,
A positioning portion is provided at a lower end portion of the cylindrical body portion, which is located above an uppermost flange portion of the plurality of flange portions of the bottom portion and projects radially inward from an outer peripheral edge of the flange portion. A washing and dewatering tub characterized by being used. The washing and dewatering tub according to claim 2,
The washing and dewatering tub, wherein the cylindrical body portion has a conical cylindrical shape in which a region below the positioning portion gradually expands in diameter downward. The washing and dewatering tub according to claim 2,
In the cylindrical body, a region corresponding to the plurality of flanges in a region below the positioning portion has a cylindrical shape, and a region below the cylindrical region faces downward. A washing and dewatering tub characterized by a gradually expanding conical tube shape. The washing and dewatering tub according to any one of claims 1 to 4,
The bottom is erected radially inward and downward with respect to the annular packing so as to position the annular packing together with the lower surface of the lowermost flange of the plurality of flanges. A washing and dewatering tub having an annular rib.   A washing machine comprising the washing and dewatering tub according to any one of claims 1 to 5.

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