JPH0340637B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a drain hose for a washing machine, and more particularly to a bellows-shaped internal hose for use in a fully automatic washing machine.

[Background of the invention]

The conventional PVC hose with a core wire shown in Utility Model Publication No. 53-19627 has poor vibration resistance and durability, and may not be able to withstand long-term use.Furthermore, the plasticizer in the PVC is susceptible to attack by detergents and bleach. In some cases, the plasticizer content was lost, resulting in hardening or dimensional changes, which further exacerbated the problem.

[Purpose of the invention]

An object of the present invention is to provide an inexpensive internal drainage hose that has excellent vibration resistance, durability, and detergent resistance.

[Summary of the invention]

The present invention is characterized in that the hose is made of synthetic resin without a core wire, has a bellows shape, and is flexible enough to follow the vibrations of the tank.

[Embodiments of the Invention] Specific embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an outer frame of the main body, and an outer tank 3 that is buffer-supported by a hanging rod 2 is suspended inside the outer frame. Furthermore, inside it, a washing tub 4 and a stirring blade 5 are installed in the center, and a clutch 6 and a magnet 7 for switching between washing operation and dewatering operation and stopping the brake are attached to the lower part of the washing tub 4, and a stirring blade 5 is connected to the washing tub 4 and the stirring blade through a belt 8. A motor 9 for rotating the blade 5 and the like are attached. On the other hand, a top cover 10 is fixed to the upper part of the outer frame 1, and a panel section 11 containing various electrical components is attached to the top cover 10.
and a lid 12 are attached. Further, a drain port 13 is provided at the bottom of the outer tank 3, and the water in the tank 3 is drained to the outside via a drain valve 14, an internal drain hose 15, and an external drain hose 16. This internal drainage hose 15 is made of synthetic resin without a core wire, and one end of the L-shaped part 17 is inserted into the drainage valve 14 and fixed with a band 18, and a cuff 20 is attached to the outer periphery 19 of the other straight end. It is fixed by pushing an inset collar 21 into the L-shaped part 1, and has a bellows-like peak 22 in the middle.
7 to the other linear end 19. Then, the bellows-shaped peak 22 is formed in the L-shaped portion 1 from the middle.
A sloping bellows 23 is formed in which the height of the crest gradually increases toward 7, and furthermore, protruding ribs 24 are provided at both ends of the bellows-like ridge 22 and at the top and bottom of the middle part. Both ends of this rib 24 are formed into inclined ribs 25 in which the rib height is gradually increased from the center toward the end surface direction, and the rib width is also gradually increased. In addition, when used in a large washing machine, the other straight end 1 is attached to the hose configuration described above.
It can be used simply by providing an intermediate pipe section 26 on the 9 side which is straight and has a plurality of protruding ribs in the longitudinal direction to make it longer. Furthermore, a protrusion 26 is integrally provided at the end of the L-shaped portion 17 for positioning the hose when attaching it to the left and right sides.

In the above configuration, when molding the main hose 15, material is supplied from the other straight end 19 side and blow molding is performed, but the wall thickness on the opposite side to the material supply inevitably becomes thicker after molding. . This is not sufficient to absorb the vibrations of the main body, and the internal vibrations are directly transmitted to the outer frame portion 1. Therefore, by forming the inclined bellows 23 in the vicinity of the L-shaped portion 17, the overall thickness becomes substantially uniform and vibrations are diffused. Further, the inclined ribs 25 can prevent the hose from sagging in the intermediate portion, and the gradually increasing sloped shape allows vibrations to be diffused and transmitted smoothly.

〔Effect of the invention〕

According to the present invention, the following effects can be produced.

(1) By providing the ribs 24 and the inclined ribs 25 in the vertical direction at both ends and in the middle of the bellows-like crest 22 of the hose 15, it is possible to reliably prevent the middle part from sagging and to diffuse vibrations.

(2) By forming the oblique bellows 23 near the L-shaped portion 17 on the side of the drain valve 14, the wall thickness of the bellows 22 of the hose 15 can be made almost uniform, and vibrations can be further diffused to prevent vibrations. It prevents stress concentration and provides long-term durability.

(3) It can be used in large-sized washing machines by simply providing the intermediate pipe section 26 in the same hose configuration, and by adding protruding ribs to it, it will not be crushed and will have the same effect as washing machines other than large-sized ones. Obtainable.

(4) Since the L-shaped portion 17 to the other linear end portion 19 can be integrally molded from synthetic resin, an inexpensive and highly reliable hose can be obtained without gluing the joints or the like.

(5) By attaching a cuff 20 to the outer periphery of the other straight end 19 and a collar 21 to the inner periphery, the outer frame 1
The external hose 16 can be easily connected.

[Brief explanation of the drawing]

FIG. 1 is an external sectional view of a washing machine having the present invention;
Figure 2 is a sectional view of the same hose, Figure 3 is an external view seen from the P direction in Figure 2, Figure 4 is a sectional view of the same large hose, and Figure 5 is viewed from the Q direction in Figure 4. The external view, FIG. 6, is a sectional view taken along the line A--A in FIG. 2. 1... Outer frame, 3... Outer tank, 14... Drain valve, 15... Internal drain hose, 17... L-shaped part,
19... Linear other end, 22... Bellows-shaped crest, 23
... Sloped bellows, 24 ... Protruding rib, 25 ... Slanted rib, 26 ... Intermediate pipe.

Claims (1)

[Scope of Claims] 1. An outer frame, an outer tank part for receiving water placed in the outer frame, a drain valve attached to the lower part of the outer tank for draining water from the outer tank, and a discharge valve of the drain valve. For those equipped with an internal drain hose that has one end connected to the outlet and the other end supported by the outer frame, the internal drain hose has an L-shaped part that faces the drain valve and the other straight end that faces the outer frame. and a bellows-like ridge between both, made of synthetic resin, and provided with slanted ribs on both ends of the bellows-like ridge and a protruding rib in the middle, so that the height of the bellows-like ridge is L. A drain hose for a washing machine that is characterized by being gradually raised toward the shape. 2. In what is stated in claim 1,
A drain hose for a washing machine, characterized in that an intermediate pipe portion having a plurality of protruding ribs is provided on the other straight end side.