JP2004169840A - Overflow hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an overflow hose for preventing refuse from being stored in a bent portion of the hose. <P>SOLUTION: In an arrangement of the overflow hose 1 in which a bellows portion 3 is bent substantially at a right angle, deep fold portions 31 and shallow fold portions 32 are disposed on the inner side and the outer side of the bent portion, respectively. The deep fold portion 31 are contracted and bent on the inner side of the bent portion, the shallow fold portions 32 are expanded on the outer side of the bent portion, and inner and outer circumferential surfaces thereof are deformed substantially smooth. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a flood hose for a washing machine.
[0002]
[Prior art]
Conventionally, a flood hose has a flat hose having a predetermined width outside a bellows-shaped bent portion described in Japanese Utility Model Publication No. 7-7901 in order to reduce the impact sound of unpleasant water. .
[0003]
[Problems to be solved by the invention]
However, since the flood hose is formed outside the bellows-like bent portion because it is a flat portion, if it is bent with a small radius of curvature, there is a problem that it buckles inward of the bent portion. Further, the flat portion has only a predetermined width of the bent portion, and since there is unevenness due to the bellows around the bent portion, there is a problem that dust is easily accumulated in the uneven portion and the hose is clogged.
[0004]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a water overflow hose in which the hose does not buckle and dust does not accumulate in the bent portion.
[0005]
[Means for Solving the Problems]
The present invention provides a resin hose in which a bellows portion is formed at least in a part of the longitudinal direction, and the bellows portion is piped as a bent portion. In the circumferential direction, the depth of the folds is different from each other in a bellows shape in which the fold deep portion and the fold shallow portion are integrally formed, and the fold deep portion is arranged on the inner peripheral side of the bent portion and contracted, while the shallow fold portion is formed in the bent portion. By arranging the folds on the outer peripheral side to expand the folds, the inner peripheral surface is made substantially smooth.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a flood hose according to the present invention will be described with reference to the accompanying drawings.
[0007]
FIG. 1 is an overall view, partially in longitudinal section, showing an embodiment of a flood hose according to the present invention. In the overflow hose 1, a straight pipe portion 2a, a bellows portion 3, and a straight pipe portion 2b are formed of a polyolefin resin along the longitudinal direction. It is integrally formed continuously by blow molding with a synthetic resin or the like. A non-slip slit 4 is formed on the outer peripheral surface of the straight pipe portion 2a of the overflow hose 1. A connection part 5a having a large inner diameter is formed at one end of the overflow hose 1, and a bent connection part 5b is formed at the other end.
[0008]
FIG. 2 is a partially enlarged cross-sectional view of FIG. 1, and a fold deep portion 31 in which a height difference between a peak portion 31 a and a valley portion 31 b is increased in substantially half of the circumferential direction of the bellows portion 3 having annular irregularities, A fold shallow portion 32 in which the height difference between the peak portion 32a and the valley portion 32b is reduced in approximately the other half of the circumferential direction.
[0009]
FIG. 3 is a cross-sectional view taken along the line XX in FIG. 2, and the bellows portion 3 includes a fold deep portion 31 formed by a peak portion 31a and a valley portion 31b, and a fold shallow portion 32 formed by a peak portion 32a and a valley portion 32b. Are formed continuously along the circumferential direction.
[0010]
FIG. 4 is a vertical sectional view of a washing machine employing the overflow hose according to the present invention. An overflow section 66 is provided on a side surface of the outer tub 61. An overflow hole 67 is formed at the bottom of the overflow section 66, and the overflow hose 1 is attached to the overflow hole 67. The drive section 63 and the drainage device 7 are attached to the bottom of the outer tank 61. The drive unit 63 is linked with a stirring blade 65 provided at the bottom of the washing tub 62 having the dewatering holes 64. The drainage device 7 is provided with the overflow hose 1 and the drainage hose 71.
[0011]
FIG. 5 is a partial cross-sectional overall view of the overflow hose in a bent state in FIG. 4, and the overflow hose 1 has a bellows portion 3 bent at a substantially right angle. This piping is performed by arranging the deep fold portion 31 inside the bent portion and the shallow fold portion 32 outside the bent portion. A connecting portion 5a formed at one end of the overflow hose 1 and having a large inner peripheral diameter is connected to the overflow hole 67, and a connecting portion 5b formed at the other end is connected to the drainage device 7. The fold deep portion 31 contracts and bends inside the bent portion, and the fold shallow portion 32 expands outside the bent portion, and the inner and outer peripheral surfaces thereof are deformed almost smoothly.
[0012]
FIG. 6 is a partially enlarged vertical cross-sectional view showing another embodiment of the overflow hose according to the present invention, in which the height difference between the peak 31a and the valley 31b is increased in substantially half of the bellows 3 in the circumferential direction. In the other half of the circumferential direction, the width w of the peak 32a is gradually reduced, and the shallow fold 32 is formed in which the valley 32b is wide and almost flat.
[0013]
FIG. 7 is a cross-sectional view showing the bent state of FIG. 6, in which the bellows part 3 is bent at substantially a right angle. In this bent state, the deep fold 31 is inside the bend and the shallow fold 32 is the bent part. It is located outside. The deep fold portion 31 contracts and bends inside the bent portion, and the shallow fold portion 32 expands outside the bent portion, and the inner and outer peripheral surfaces thereof are deformed almost smoothly.
[0014]
Note that the present invention is not limited to the above-described embodiment, and the bellows portion can be arbitrarily provided at a plurality of places.
[0015]
【The invention's effect】
The present invention is configured as described above, and has the following effects.
[0016]
By forming the inner surface of the bellows portion located outside the bent portion at the time of bending the bellows portion into a smooth surface, it is possible to obtain a flood hose which does not buckle and does not accumulate dust.
[Brief description of the drawings]
FIG. 1 is a partial longitudinal sectional overall view showing an embodiment of a flood hose according to the present invention.
FIG. 2 is an enlarged cross-sectional view of the bellows portion of FIG.
FIG. 3 is a sectional view taken along the line XX in FIG. 2;
FIG. 4 is a longitudinal sectional view of a washing machine employing the overflow hose according to the present invention.
FIG. 5 is a partial cross-sectional overall view of the overflow hose in a state where the hose is bent in FIG. 4;
FIG. 6 is an enlarged partial longitudinal sectional view showing another embodiment of the overflow hose according to the present invention.
FIG. 7 is a sectional view showing the bent state of FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flood hose 2a, 2b Straight pipe part 3 Bellows part 4 Slit 5a, 5b Connection part 6 Washing machine 7 Drainage device 31 Deep fold part 31a Mountain part 31b Valley part 32 Shallow part 32a Mountain part 32b Valley part 61 Outer tub 62 Washing tub 63 drive unit 64 dehydration hole 65 stirring blade 66 overflow unit 67 overflow hole 71 drainage hose

Claims (1)

A resin hose in which a bellows part is formed at least in a part of the longitudinal direction, and the bellows part is piped as a bent part. And the fold shallow portion is integrally formed to form a bellows shape, and the fold deep portion is arranged on the inner peripheral side of the bent portion to contract, while the shallow fold portion is arranged on the outer peripheral side of the bent portion to expand the fold. This is a flood hose whose inner peripheral surface is made substantially smooth.

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