JP2559102Y2 - Washing machine drain hose - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a configuration of an internal drain hose that connects a drain valve provided at a lower portion of a washing tub of a washing machine to an outer frame.

[Conventional technology]

As described in Japanese Patent Application Laid-Open No. 58-61791, a conventional drain hose is an integrally formed product in which the drain hose itself is formed into an L-shape, or an integrally formed product in which a bellows shape is simply formed in a straight line. Was. Further, this was blow-molded or molded by soft PVC with a core wire inserted in the bellows portion. On the other hand, the conventional drain hose is attached and fixed to the drain valve by a clip, and the airtightness is maintained by the slippage during vibration or the tightening force of the clip, thereby maintaining the reliability of water leakage.

[Problem to be Solved by the Invention] However, in the above-mentioned conventional technology, the inner diameter of the part to be fixed to the drain valve (the dimension of φD1 in FIG. 6) is limited in the blow molding because the mold is based on the outer diameter. In order to maintain the reliability of the water leakage, the sealant was applied to the inner surface of the drainage hose and the contacting part with the drainage valve in order to maintain the reliability of water leakage. In addition, since the inner diameter of the clip is not formed in an exact circular shape, it is impossible to apply a uniform tension to the drainage hose. As shown in Fig. 7, when changing the drain hose from side to side, it is necessary to remove the drain hose from the drain valve once, change its direction, and fix it again. It was sometimes the case that incomplete insertion into the valve caused water leakage. On the other hand, in order to obtain the φD1 dimension more accurately, and blow-molded product with a bellows shape formed in a straight line in a straight line direction so that the drain hose does not have to be removed from the drain valve when changing left and right, it is fixed to the drain valve as shown in FIG. However, when used, drooping occurs downward in section 1a, and the drooping increases with the passage of time, and the residual water in the drainage hose causes abnormal noise during dehydration vibration and freezing in winter. Comes involved.

An object of the present invention is to provide a highly reliable drainage hose by changing the drainage hose when replacing the drainage hose without changing the drainage hose from the drainage valve and applying a uniform tightening force to the sealing portion. It is in.

[Means for solving the problem]

In order to achieve the above object, the bellows-shaped drainage hose is blow-formed in a simple linear direction, and another part for maintaining the L-shaped elbow shape is formed so as to wrap the drainage hose, and a drainage valve is provided instead of the clip. The fixing portion is provided with a metal band so as to give uniform sealing force to the sealing portion. Furthermore, the drainage hose was prevented from being cracked or broken by inserting and fixing the exhausting body to the portion that vibrates flexibly.

[Action]

Once the drain hose is fixed to the drain valve, there is no need to remove it, so there is no danger of water leakage due to variations in customer work. Also, since the L-shaped elbow shape is formed by another component, there is no downward drooping and the metal band is uniformly squeezed and fixed, so that the reliability of leaking of the seal portion is very high.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of the present invention. Reference numeral 1 denotes a drainage hose, which is usually straight on a straight line as shown in FIG. 2, and has a bellows shape at an intermediate portion. This part is blow molded with a thermoplastic resin. 2 is drain hose 1 L
It is a supporter for fixing to the shape, a part 2a for fitting and fixing the drainage hose, a part 2b for inserting the elastic resin 4
, And a metal band 5, and the supporter 2 has a substantially symmetrical shape with the hinge portion 2c integrally formed as an axis.

FIG. 4 is a view showing a configuration of a drain hose of a conventional washing machine, and 3 is a drain valve. FIG. 5 is an enlarged view of a main part, and 5 is a metal band. Fig. 6 shows a cross-sectional view, and the dimensional relationship is D2 (drain valve raising part)> D1 (drain valve outer diameter)> D3 (drain hose inner diameter).
It is. When this is φD1 ≒ 30 mm, it is desirable to be closer to H / φD1 ≒ 1, but as φD1 becomes larger, blow molding becomes more difficult.
H / φD1 becomes smaller, and the dimensional control of the drainage hose can be performed only with the outer diameter φD4 instead of φD1 due to the configuration of the mold. Strict dimensional accuracy and surface condition of the seal part at the contact surface between the drainage valve 3 and the drainage hose. It will require management. FIG. 7 is a view showing the work of changing the left and right in a conventional drain hose. As shown in FIG.
Must be removed from the drain valve 3 and the metal band 5 must be removed and returned to its original position. Here, the operation shown in FIG. 7 may be performed by a general customer. At this time, the drainage hose 1 is incompletely inserted, the clip is forgotten to be returned, the alignment mark is misaligned, etc., so that a large amount of water leakage is generated. ing.

If the drain hose 1 is sandwiched between the supporters 2 in the configuration shown in FIG. 1 and the holes 2d and 2e are fixed with screws, the bellows portion generated when the drain hose 1 is attached as a single item as shown in FIG. 1a can be prevented from sagging downward, and the sealing surface of the drainage bubble 3 can be squeezed and fixed by the metal band 5 with a uniform force, so that the reliability of water leakage increases.
Further, the elastic body of the exhaustive resin 4 can prevent rubbing and perforation due to friction between the thin portion of the bellows portion and the supporter 2 due to vibration during dehydration. In addition, since the drain hose 1 is formed straight, there is no need to remove the drain hose 1 from the drain valve 3 when changing the drain hose from side to side, and loosen the screws at 2d and 2e to reverse the hose direction and fix similarly. And workability is good.

[Effect of the invention]

According to the present invention, the drainage hose can be changed from left to right without removing the drainage hose from the drainage valve, and the drainage hose and the drainage valve can be fixed by applying a uniform force to the sealing surface while applying a uniform force to the drainage hose. Reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a structure according to an embodiment of the present invention, FIG. 2 is a normal state diagram of a drain hose, FIG. 3 is an actual use state diagram of a drain hose, and FIG. 4 is a drain hose of a conventional washing machine. 5, FIG. 5 is an enlarged view of the mounting portion, FIG. 6 is an explanatory view of the mounting portion, and FIG. 7 is a diagram showing a conventional method of changing the drain hose from left to right. 1: drain hose, 2: supporter, 3: drain valve, 4
... elastic resin, 5 ... metal band.

Claims (1)

(57) [Scope of request for utility model registration] 1. A blow molded drain hose which is fitted and connected to a connecting portion of a drain valve and has a straight bellows shape, wherein the drain hose is tightened from the outer peripheral side to the connecting portion and the drain hose is deformed. A drain hose for a washing machine having a supporter for maintaining an L-shape, wherein the supporter has a pair of left-right symmetrical supporter pieces connected by a hinge portion, each supporter piece is located at the center, and the drainage hose is provided. A portion 2a bent into an L shape, a metal band provided at a fastening portion of the connecting portion, and a portion provided at an end remote from the metal band and into which the elastic resin 4 wrapping the drain hose is inserted. A drain hose for a washing machine, comprising 2c, wherein both supporter pieces fitted to sandwich the drain hose are screwed together and fixed.