JPS59232590A - Drain hose of one-tub type washer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a domestic laundry 1/charcoal drainage hose.

Conventional structure and its problems Traditionally, the drainage hose used in single-tank washing machines has the function of a washing and dewatering tank due to the structure of single-tank washing machines. The outer tank that encases and supports the is suspended from the outer box by a vibration isolating tube. Therefore, during washing ρ, the vibration isolation %- is in a fully compressed state, and the washing operation is performed with the outer tank lowered. In addition, during spin-driving operation, the inner tub rotates at high speed and spins the laundry centrifugally, so if the laundry is not evenly balanced in the inner tub, the outer tub will vibrate from side to side. For that reason,
The drain hose fixed between the mouthpiece of the drain valve fixed to the lower part of the outer tank and the outer box is required to have strength against vibration, and
Heat resistance is also required because laundry is sometimes done in hot water.

For this reason, conventionally used drainage hoses were made by wrapping a synthetic resin tape around a helical steel wire, etc., and then attaching separate fittings to both ends of the hose.○However, there were variations in the work. There have been problems such as instability in quality such as water leakage from the bonded parts due to this, and high unit cost of parts due to the manufacturing of the hose and the materials used.

Purpose of the Invention In order to solve this problem, we have developed a method that satisfies the various performances as a drain hose for a single-tank washing machine as described above, and has stable quality.
Furthermore, the purpose is to provide products with low unit parts prices.

Structure of the Invention In order to achieve the above-mentioned object, the present invention comprises integrally molding the cap portions and the bellows hose portions at both ends of a drainage hose from synthetic resin.
The shape of the ridges on the bellows part is set, reinforcement is formed in the longitudinal direction of the bellows part, and the shape of the ridges is changed in order to reduce the concentrated stress at the end of the reinforced part.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 denotes a washing and dewatering tank, 2 an outer tank, and 3 a board attached to the lower part of the outer tank, on which a drive mechanism section 4 of a drive motor 5, a drain valve 6, etc. are attached. 7 is a rotor blade attached to the center of the inner tank 1. 8 is a vibration-proofing tube that suspends and supports the parts attached to the outer tank 2 and the board 3 on the outer box 9; 010 is a top plate attached to the upper part of the outer box 9; 11 is a top plate that damps vibrations during dehydration operation; A lid is pivotally supported on a top plate 10, and 12 is an operation box that houses control parts such as a time switch.

An abbreviated mouthpiece 20 of a hollow bellows drainage hose 19 is watertightly fixed to the lower mouthpiece of the drain valve 6.

In addition, a straight fitting part 16 at the other end of the drain hose 13 has a structure in which an outside hose 14 is inserted into the outer side of the outer box 9.

Due to the structure of the single-tank washing machine, the drain hose 13 used in a single-tank washing machine supplies washing water to the outer tank during washing, so the spring inside the vibration-proof pipe 8 is fully compressed. The outer tank 2 is lowered and the drain hose 13 is deformed up and down.

On the other hand, since the inner tub 1 rotates during dehydration, the outer tub 2 generates vibrations due to the unbalance of the washing material in the inner tub 1. This vibration is transmitted through the drain hose to the outer box 9, causing problems such as vibration of the outer box 9 during operation and abnormal noises generated due to the vibration. Furthermore, when doing laundry, there are an increasing number of cases in which people use hot water at a moderate temperature rather than leftover bath water or hot water from a hot water heater. As mentioned above, the drain hose 13 of the single-tub washing machine
The conditions required for this are: ■ The unit price of parts must be low and the quality must be stable.

■ It must be flexible to prevent the vibration of the outer tank from being transmitted to the outer box during dewatering operation.

■ Make sure that the drain hose does not become abnormally deformed when washed with hot water.

■ The internal hose does not deform due to changes in the top and bottom of the outer tank.

The following conditions are required.

As a way to reduce the unit price of parts under the above conditions, in this example, we used spiral-shaped stainless steel, as shown in Figures 2 and 3, which was conventionally used! The method of wrapping vinyl chloride tape 18 around 17 and adhering it to the caps at both ends was changed, and the drainage hose 13 was made of a synthetic resin material by blow molding, making it possible to reduce the unit cost of parts. The characteristics of this molding method are that the total mold cost is low, the molding cost is low, and the material cost is low compared to the conventional method.In addition, the outer box reduces vibrations during dehydration operation. In order to avoid this, the synthetic resin material was selected and the cross-sectional shape between the two caps was made into a bellows shape.

In addition, if the hose deforms when washed using hot water (around 50°C) and has a sag of 9, the wall thickness of the inner part 2d of the abbreviated-shaped mouthpiece 20 should be made 2 times larger than that of the other mouthpiece l520. The reinforcing part 2d is made to be about twice to three times thicker so that the substantially shaped mouthpiece part 20 does not undergo thermal deformation. Normally, it is impossible to make parts thicker using the blow molding method, but this can be done by setting the birch ink part of the mold. or,
In order to prevent the bellows-shaped portion from sagging due to heat, reinforcing ribs 21 are formed in the longitudinal direction of the bellows portion to connect the peaks. The cross-sectional shape of this reinforcing rib 21 is similar to the cross-sectional shape of other bellows parts. The reason for this is to make the wall thickness of the bellows portion and the reinforcing rib 21 uniform.

If this reinforcing rib 21 is formed all over the longitudinal direction of the bellows part, it loses its flexibility against vertical and horizontal movements, so a part without reinforcing ribs is also provided in the entire bellow group. It has flexibility. In addition, since stress concentration due to vibrations applied to the drain hose during dewatering operation occurs at the boundary between the part with the reinforcing rib 21 and the part without it, the height A of the reinforcing rib 21 is adjusted in stages as shown in 22.23. As an example in which the height is lowered, the reinforcing ribs 21 are located at three parts of the bellows-shaped part 19 on the side of the abbreviated mouth part 20, the central part, and the side of the straight mouth part 16.
However, this does not apply to the locations where they are formed.

Further, a cap receiving portion 15 is inserted into the straight cap portion 16,
This cap holder 16 is fixed to the case 9.

A notch 24 is formed in a part of the straight line of the Jul water hose of the base receiving part 15 [1] where it is inserted into the metal part 16, and a protruding part 25 is formed corresponding to this notch. , Sho 1 Straight mouth part 16 of water hose and 1] Alloy receiver 15 is connected to external hose 1
It prevents rotation when inserting 4. In addition, a plurality of protrusions 26 are formed with an inclined side in the insertion direction to prevent the base receiving part 15 from being removed from the linear base part 16. Further, inside 411 of the linear base portion 16, there is a tube 27 that partially surrounds a protrusion corresponding to the protrusion 1526.
is inserted in correspondence with the protruding portion 26. With this configuration, the insertion between the cap receiving portion 15 and the straight cap portion 16 becomes strong.
When inserting the external hose 14 into the straight mouth part 16, measures are taken to prevent water leakage due to deformation or the like.

Effects of the Invention As is clear from the above explanation, according to the present invention, by setting the in-machine drainage hose of a single-tub washing machine to a shape suitable for the flow molding method, it has the same function as a conventional hose and has stable quality. In addition, the manufacturing cost of the hose mold can be reduced and the unit price of parts can be reduced, and practical durability can be improved by gradually reducing the end of the reinforcing rib. It is possible to improve the ease of assembly by attaching it without using any other method.

[Brief explanation of the drawing]

Fig. 1 is an overall sectional view of a general one-tub washing machine, the second cause is a sectional view of a conventional drain hose, Fig. 3 is a partial sectional view of the bellows part of the same drain hose, and Fig. 4 is the invention of the present invention. 5 is a partial sectional view of the upper bellows part on the side of the abbreviated mouthpiece of the Dogo water hose; FIG. 6 is a partial sectional view of the upper part of the center of the bellows part; The figure is a partial cross-sectional view of the upper part of the linear cap part of the bellows part, Figure 8 is a partial cross-sectional view of the ring-shaped cap part, Figure 9 is a cross-sectional view of the reinforcing rib of the bellows part, and Figure 10 is the same straight line. FIG. 11 is a partial perspective view of the linear cap portion; FIG. 12 is a partial sectional view of the linear cap portion;
FIG. 3 is a perspective view of the cap holder. 1... Washbasin/dehydration tank, 2... Drain tank, 6... Drain valve, 9... Outer box, 13-... 4th water hose,
15... Cap holder part, 16... Straight cap part, 19... Bellows shaped part, 20... Cap part, 21... Reinforcement rib. Name of agent: Patent attorney Toshio Nakao and 1 other person Figure 2 Figure 8-Figure 10 Figure 5 Figure Otsu Figure 12 Figure 9 Figure 11 Figure S Figure 13

Claims (1)

[Claims] A washing/dehydration tank with a rotary blade in the center and an outer tank with a board attached to the lower part with a driving mechanism, motor, drain valve, etc. are suspended on the outer box using multiple vibration-proof tubes. An abbreviated mouthpiece of a hollow drainage hose formed of synthetic resin is watertightly fixed to the lower end mouthpiece of the drain valve that communicates with the lower drainage hole of the tank, and a mouthpiece receiver is attached to the straight mouthpiece at the other end. A hollow bellows-shaped hose is used to connect the abbreviated mouthpiece and straight mouthpiece of the drainage hose, which fix the mouthpiece receiver to the outer box. Reinforcement parts connected in a cross-sectional shape similar to the peaks of the bellows part are installed above and below the bellows part of the side peak part of the hour-shaped mouth part, the peak part of the center part of the hose, and the side peak part of the straight mouth part. In addition, the chevron-shaped cross section of the reinforcing part is gradually reduced in multiple parts at the end of the reinforcing part, and the thickness of the inner angle of the abbreviated-shaped mouthpiece is made smaller than that of other parts, and the straight line is formed. Mouth part +/C [, J
A drain hose for a single-tank washing machine that has protrusions that correspond to the notches in all receivers.