JP2951159B2 - Washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine, and more particularly to a washing and dewatering tub of a fully automatic washing machine.

[0002]

2. Description of the Related Art In a fully automatic washing machine disclosed in Japanese Patent Application No. 4-197291, a washing and dewatering tub has a cylindrical body, a bottom plate connected to a lower end of the body, and the body. And a balance ring connected to the upper end of the cover. The body is formed by bending a stainless steel plate into a cylindrical shape and by caulking seams.

[0003] When the balance ring is made of resin, the balance ring is connected to the upper end of the body by a screw. Risk of injury when working. Therefore, the upper end is usually curled. As a result, the risk of injury can be eliminated and the effect of reinforcement can be obtained.

However, in this case, the seam near the upper end of the body portion is in a state where both crimping and curling are performed, and excessive processing is performed, and the metal fatigue during the dewatering operation is severely damaged. There is fear.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a washing machine in which the body of a washing and dewatering tub made of a stainless steel plate is prevented from being damaged and the strength is improved.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a body formed by bending a stainless steel plate into a cylindrical shape, crimping a seam, and curling the upper end, and a lower end of the body made of a stainless steel plate. A bottom plate connected to the upper portion and a balance ring connected to the upper end of the body portion, in a washing machine having a washing and dewatering tub disposed in an outer tub, a seam near an upper end portion of the body portion; Is a state in which flat plates are overlapped without caulking, and this overlapped portion is connected to the balance ring with a screw.

[0007]

[Function] The seam near the upper end of the body is formed by laminating flat plates without caulking, and is subjected to only curl processing, thereby reducing metal fatigue. On the other hand, if only the curling is performed, the seam is weak in strength, but this seam is connected to the balance ring with a screw to improve the strength.

[0008]

FIG. 1 shows the entire structure of a fully automatic washing machine according to an embodiment of the present invention. An outer tub 2 is suspended and supported in the main body 1 of the washing machine, and a washing and dewatering tub 3 is rotatably supported in the outer tub 2, and a rotating blade 4 is rotatably mounted on the bottom of the washing and dewatering tub 3. Supported. A motor 5 and a driving force transmitting unit 6 are mounted on the outer bottom surface of the outer tub 2. Motor 5
Rotates only the rotor 4 via the transmission unit 6 during washing,
At the time of spin-drying, both the rotating blades 4 and the washing and spin-drying tub 3 are rotated at high speed.

The washing and dewatering tub 3 comprises a body 7, a bottom plate 8, and a balance ring 9 for maintaining the balance of the washing and dewatering tub 3 during high-speed rotation.

Referring also to FIGS. 2 to 5, the body 7 is formed by bending a single stainless steel plate into a cylindrical shape, joining seams 10 by goby folding and caulking, and forming the upper end 1
1 is formed by curling. The bottom plate 8 is made of a stainless steel plate and is caulked to the lower end of the body 7. The balance ring 9 is made of resin, and is connected to the upper end 11 of the body 7 by a plurality of screws. The seam 10a near the upper end of the body portion 7 is in a state in which flat plates are overlapped without performing goby-fold caulking connection, and the overlapped portion is directly connected to the balance ring 9 with a screw 12. . Seam 1 above
The vertical dimension of 0a is about 15 mm.

In such a configuration, when the balance ring 9 is connected to the upper end 11 of the body 7, since the upper end 11 is curled, there is no risk of injury at the upper end 11. . The upper end 11 is also reinforced by the curl processing.

The seam 10a near the upper end of the body 7 is not subjected to goby-folding and caulking, and is only curled in a state where flat plates are stacked. Less metal fatigue at the time. In this case, the reliable strength of the seam 10a is maintained by directly connecting the seam 10a to the balance ring 9 with the screw 12. The connection of the seam 10a by the screw 12 serves to suppress the goby-fold caulking connection of the seam 10 from coming off due to the centrifugal force due to the eccentric load during the dewatering operation. It also serves to improve the accuracy of the washing and dewatering tub 3 by suppressing and correcting the washing and dewatering tub 3 to a state close to a perfect circle. Thereby, stable high-speed rotation during the spin-drying operation of the washing and spin-drying tub 3 is ensured.

FIGS. 6 to 8 show a structure for removing lint provided in the washing and dewatering tub 3. FIG. A resin duct 13 is integrally provided along the inner wall of the washing and dewatering tub 3 so as to extend from the peripheral edge of the rotary wing 4 to the balance ring 9. The duct 13 is attached to the washing and dewatering tub 3 by fastening a boss 14 with a screw 15. A lint filter 17 is detachably attached to the upper opening 16 of the duct 13. At the time of washing, the water in the washing and dewatering tub 3 is pushed up into the duct 13 by the pump-up action of the back blades of the rotary wings 4, passes through the lint filter 17, and is thus suspended in the water. Debris is removed.

To explain the mounting structure of the lint filter 17, the frame 18 of the lint filter 17 has a handle 19 integrally formed on the upper part, and ribs 20 integrally formed on both sides. The upper end 20a of the rib 20 is closer to the inside of the tank than other places, and a dowel 21 is formed at the front of the rib 20 near the center. On the other hand, the peripheral side wall of the upper opening 16 of the duct 13
It has an insertion groove 22 inclined toward the inside of the tank and for the rib 20. A dowel 23 is also formed in the insertion groove 22, and the dowel 23 corresponds to the dowel 21 of the rib 20.

The lint filter 17 is removably mounted by inserting the rib 20 into the insertion groove 22 from above. In this case, when the insertion is completed, the upper end 20a abuts against the wall of the insertion groove 22 and the dowels 21 and 23 mesh with each other when the insertion is completed, so that the rib 20 is securely mounted and does not come off due to vibration during washing and dewatering. .

[0016]

According to the present invention, a body formed by bending a stainless steel plate into a cylindrical shape, caulking the seam and curling the upper end portion, and a lower end portion of the body portion made of the stainless steel plate are provided. A combined bottom plate,
From the balance ring connected to the upper end of the body part, in a washing machine comprising a washing and dewatering tub arranged in the outer tub, the seam near the upper end part of the body part is not flattened by caulking. This is a state where the washing and dewatering tubs are joined by screws to the balance ring, so that the washing and dewatering tub can be prevented from being damaged by metal fatigue and the strength of the washing and dewatering tub is improved. be able to.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a fully automatic washing machine according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a washing and dewatering tub of the washing machine.

FIG. 3 is a front view of a main part of a washing and dewatering tub of the washing machine.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is a sectional view showing a lint removing structure of the washing machine.

FIG. 7 is an enlarged sectional view of a main part of FIG. 6;

FIG. 8 is an exploded perspective view of a main part of FIG. 6;

[Explanation of symbols]

 2 Outer tub 3 Washing and dewatering tub 7 Body 8 Bottom plate 9 Balance ring 10 Seam of body 10a Seam near upper end of body 11 Upper end of body 12 Screw

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-197291 (JP, A) JP-A-6-54988 (JP, A) JP-A-4-197292 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) D06F 37/12

Claims (1)

(57) [Claims] 1. A body formed by bending a stainless steel plate into a cylindrical shape, crimping a seam, and curling an upper end, a bottom plate made of a stainless steel plate and connected to a lower end of the body, From the balance ring connected to the upper end of the body part, in a washing machine comprising a washing and dewatering tub arranged in the outer tub, the seam near the upper end part of the body part is not flattened by caulking. A washing machine characterized in that it is in an overlapped state, and the overlapped portion is connected to the balance ring with a screw.