JPS59232589A - 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] Industrial Field of Application The structure of the conventional example and its problems Conventionally, the drainage hose used for a single-tank washing machine is -Due to the structure of the standard washing machine, the interior is a washbasin and dewatering tank. The outer tank, which encloses and supports the inner tank, is suspended from the outer box by means of a vibration isolation tube. Therefore, during washing, the vibration isolating tube is fully compressed and the outer tub is lowered during the washing operation.

Furthermore, during spin-driving operation, the inner tub rotates at high speed to centrifugally spin the laundry, so if the laundry is not evenly balanced in the inner tub, the outer tub will vibrate vertically and horizontally. Therefore, the drain hose fixed between the mouthpiece of the drain valve fixed to the bottom of the outer tank and the outer box must be strong against vibrations, and also require heat resistance since washing may be done in hot water. Ru.

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 portion due to this, and an increase in the unit cost of parts due to the manufacturing of the hose and the materials used.

Purpose of the Invention In order to solve the above problems, we have developed a method that satisfies the various performances as a drainage hose for the one-tank wash basin mentioned 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. 1 is a washing and dehydrating tank, 2 is an outer tank, 3 is a board attached to the lower part of the outer tank, and a drive A drive mechanism section 4 of the motor 5, a drain valve 6, etc. are attached. The rotary blade is attached to the center of the inner tank 1. Reference numeral 8 denotes a vibration-proofing tube that suspends and supports several parts mounted on the outer tank 2 and the substrate 3 on the outer box 9, and reduces vibration during dehydration operation. 10 is a top plate attached to the upper part of the outer box 9, 11 is a lid pivotally supported by the top plate 10, and 12 is an operation box for storing 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 water control 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.

The drainage hose 13 used in a single-tank washing machine has the structure of a single-tank washing machine."-1 During washing, washing water is supplied to the outer tank, so the splashes in the vibration isolation pipe 8 are 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. In addition, when doing laundry, there are increasing cases of washing using hot water at a moderate temperature rather than leftover hot water from a bath or water heater.

As mentioned above, the conditions required for the drain hose 13 of a single-tub washing machine are: - The unit price of parts must be low and the quality must be stable.

■ Must be flexible to prevent vibrations from 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.

In this embodiment, as a method to reduce the unit price of parts under the above conditions, as shown in FIGS. 2 and 3, vinyl chloride tape 1 is attached to the previously used helical stainless steel wire 17.
By changing the method of wrapping the drain hose 8 and gluing it to the caps at both ends, the drainage hose 13 was made using the synthetic resin material blow molding method, making it possible to reduce the unit cost of parts. This molding method has the advantage 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, in order to prevent vibrations during dewatering operation from being transmitted to the outer box, a synthetic resin material is selected and the cross-sectional shape between the two mouthpieces is made into a bellows shape.

In addition, regarding the deformation and sagging of the hose when washing using hot water (around 50'C), the wall thickness of the inner part 20' of the abbreviated-shaped mouthpiece 20 should be changed from that of the other mouthpiece 1 (20). 2
The reinforcing portion 20' is made to be about twice to three times thicker so that the substantially shaped mouthpiece does not undergo thermal deformation. Normally, it is impossible to thicken parts using blow molding, but this can be done by setting the parting part of the mold. Also, to prevent the bellows-shaped part 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 made 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. When this reinforcing rib 21 is formed in the entire longitudinal direction of the bellows part, it loses its flexibility against vertical and horizontal movements, and is used as a drain hose during dewatering operation at the boundary between the part with and without the part. Because stress concentration occurs due to such vibration, the height A of the reinforcing rib 21 is increased by 2 in stages.
2 and 23. As an example, the reinforcing ribs 21 are formed at three locations above and below the bellows-shaped portion 19, on the side of the abbreviated mouthpiece 20, in the center, and on the side of the straight mouthpiece 16. This does not apply to

Further, a cap receiving portion 15 is inserted into the linear cap portion 16, and the cap receiving portion 15 is fixed to the outer case 9.

A cutout 24 is formed in a part of the mouthpiece receiving part 15 that is inserted into the straight mouthpiece part 16 of the drain hose, and a protruding part 25 is formed corresponding to this notch, and the drainage hose The straight mouth part 16 and the mouth socket part 15 serve as a V stop when inserting the external hose 14. 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, a tube 27 having a protrusion partially corresponding to the protrusion 26 is inserted inside the linear mouthpiece 16 so as to correspond to the protrusion 26 . With this configuration, the base receiving portion 15
The insertion of the straight fitting part 16 becomes strong, and the external hose 14
When inserting the pipe 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, the in-machine drainage hose of the single-tank drainage hose is set in a shape suitable for blow molding and has the same function as a conventional hose. Reduction of unit price 1. Stabilization of quality can be achieved.

[Brief explanation of drawings]

Figure 1 is an overall sectional view of a general single-tank washing machine, Figure 2 is a sectional view of a conventional drainage hose, Figure 3 is a partial sectional view of the bellows part of the same drainage hose, and Figure 4 is a main 5 is a partial sectional view of the upper bellows part on the abbreviated mouth side of the drainage hose showing one embodiment of the invention; FIG. 6 is a partial sectional view of the upper part of the center of the bellows part; Figure 7 is a partial cross-sectional view of the upper part of the linear mouthpiece of the same bellows part, Figure 8 is a partial cross-sectional view of the rounded mouth part, Figure 9 is a cross-sectional view of the reinforcing rib of the bellows part, and Figure 10 is the same. 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... Washing and dehydration tank, 2... Outer tank, 6...
...Drain valve, 9...Outer box, 13...Drain hose, 15...Lock holder, 16...Linear cap section, 19... Bellows-shaped part, 20...Match part, 21... -Reinforcement rib. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure, 5/3

Claims (1)

[Claims] A cleaning/dehydration tank with rotary blades in the middle part and an outer tank with a board attached to the drive mechanism, motor, exhaust valve, etc. at the bottom are suspended in the outer box using multiple vibration-proof tubes. The abbreviated-shaped mouthpiece of a hollow drainage hose made of synthetic resin is watertightly fixed to the lower end mouthpiece of the drain valve, which is supported and communicated with the lower drainage hole of the outer tank, and the straight-line mouthpiece at the other end. Fix the base holder to the
A hollow bellows-shaped hose is used to communicate the curved mouthpiece and the linear mouthpiece of the drainage hose to which the mouthpiece receiver is fixed to the outer box, and the crests of the bellows-shaped parts are connected to the bellows in the longitudinal direction of the hose. Drain hose 0 for a single-tub washing machine, in which a reinforcing part connected in a cross-sectional shape similar to the peak of the part is formed above, below, or above and below the bellows part of the drain hose.