JPS6221278Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washing machine that opens and closes a drain port of a washing tub by moving up and down an overflow barrel having an overflow port at a predetermined height.

Conventionally, this type of washing machine has a structure in which the peripheral wall of the washing tub bulges outward to form a drain chamber, and an overflow cylinder for opening and closing the drain port is disposed within the drain chamber. Common. When installing an air trap for water level detection in such a washing machine, the air trap should be installed on the wall of the drain chamber, which is partitioned off from the washing tub by a strainer and is less affected by water level fluctuations during washing. However, in this case, the overflow cylinder that moves up and down and the air trap fixed to the wall of the drainage chamber must be placed with enough space so that they do not come into contact with each other.
There was a problem in that the force drain chamber had to be made larger, which unnecessarily increased the amount of water required for the washing operation, and the structure of the drain chamber became complicated due to the installation of the air trap.

Therefore, the purpose of the present invention is to provide a washing machine which can reduce the amount of washing water by installing an air trap without increasing the size of the drain chamber, and which can also simplify the structure of the drain chamber. be.

An embodiment of the present invention will be described below with reference to the drawings. 1 is an outer box of a two-tub washing machine, 2 is a washing tank attached to the outer box 1 along with a dehydration tank (not shown), 3
is a pulsator placed at the bottom of washing tub 2. 4
A drain chamber is formed on the peripheral wall of the washing tub 2 so as to extend vertically and bulge outward, and a drain port 6 to which a drain hose 5 is connected is formed at the bottom of the drain chamber. 7 is a drain strainer, 8 is an overflow strainer connected to the upper part of the drain strainer 7, and both the strainers 7 and 8 partition the washing tub 2 and the drain chamber 4. Reference numeral 9 denotes a plastic supporting frame disposed inside the drainage chamber 4, which has upper plate portions 9a at both upper and lower ends, respectively.
The bottom plate part 9b is integrally formed with a connecting cylindrical part 10 so as to protrude vertically, and an annular packing 11 is provided at the lower end of the connecting cylindrical part 10. is fitted. 12
are a pair of elastic pawls integrally formed on the support frame 9, and these are provided diagonally downward facing each other at a portion of the front edge of the support frame 9 that is a predetermined distance away from the bottom plate portion 9b. part is located inside the support frame 9. Reference numeral 13 denotes a water overflow tube as a water overflow cylinder, which is formed by extrusion molding of plastic such as polyethylene and cut into a predetermined length, and its lower end is connected to the connecting cylinder portion 10 of the support frame 9.
The upper end portion is opened at a predetermined height position within the drainage chamber 4 to form an overflow port 14 . 15 is a plastic air trap,
This is formed into an annular shape such that an inner cylinder 15a and an outer cylinder 15b, which is slightly shorter than the inner cylinder 15a, are integrally connected by an annular upper plate part 15c. This air trap 15 is arranged in the support frame 9 by inserting the overflow tube 13 into the inner cylinder 15a and surrounding the lower part of the overflow tube 13, and the lower end of the inner cylinder 15a is inserted into the bottom plate part 9b of the support frame 9. and the top plate portion 15c is brought into contact with the elastic claw piece 1 of the support frame 9.
2 and 12 to prevent movement in the vertical direction. Reference numeral 16 denotes a connecting tube, the lower end of which is connected to a connecting tube 17 protruding from the upper plate 15c of the air trap 15, and the upper end connected to the upper plate 9a of the support frame 9 and the bottom plate 18a of the operation box 18, respectively. The air trap 15 is introduced into the operation box 18 through the formed through holes 19 and 20 and connected to the water level switch 21 attached to the panel portion 18b of the operation box 18, thereby communicating the air trap 15 with the water level switch 21. The water level switch 2 is activated by the air pressure inside the air trap 15 when a predetermined amount of water is stored in the washing tub 2.
1 is activated to automatically stop the water supply. 22 is a cable whose lower end is connected to a hook part (not shown) provided on the support frame 9, and whose upper end is connected to a through tube part 23 formed on the bottom plate part 18a of the operation box 18.
It is connected to the tip of an arm portion 24a of a drainage operation mechanism 24 which is introduced into the operation box 18 through the drain control mechanism 24 and attached to the panel portion 18b of the operation box 18. Reference numeral 25 denotes a compression spring, which fits into the through-tube portion 23 and the protrusion 26 of the upper plate portion 9a of the support frame 9, and is inserted into the bottom plate portion 18a of the operation box 18 and the upper plate portion 9a of the support frame 9.
is provided between the support frame 9 and the connecting cylinder part 10 downward, and the gasket 11 is normally
is brought into pressure contact with the peripheral edge of the drain port 6 to stop the drain, and especially during rinsing, the water in the washing tub 2 is allowed to flow down from the overflow port 14 of the overflow tube 13 to the drain port 6 by overflow. From this state, the knob 24b of the drainage operation mechanism 24 is
When operated to the draining side, the support frame 9 is pulled upward via the cable 22 against the elastic force of the compression spring 25, and the seal 11 is separated from the peripheral edge of the drain port 6 to enter the draining state.

Therefore, in the above configuration, the air trap 15
To attach the support frame 9, first install the overflow tube 13.
The lower end of the overflow tube 13 is fitted into the connecting cylinder part 10 of the supporting frame 9, and the air trap 15, which has been fitted in advance to the outside of the upper end of the overflow tube 13, is moved downward along the supporting frame 9. Then, the outer cylinder part 1 of the air trap 15
5b comes into contact with the elastic claw pieces 12, 12 of the supporting frame 9, and passes between both the elastic claw pieces 12, 12 while pushing them apart. When the air trap 15 passes between the elastic claws 12, 12, the lower end of the inner cylinder part 15a comes into contact with the bottom plate part 9b of the support frame 9, and at the same time, the elastic claws 12, 12 are elastically restored and the lower end The upper plate portion 15c of the air trap 15 is engaged with the top plate portion 15c of the air trap 15, and the air trap 15 is attached to the support frame 9 through the above steps. Also, from this state, air trap 1
In order to remove the air trap 5, the elastic claw pieces 12, 12 are pushed apart with fingers, the air trap 15 is moved upward, and then the air trap 15 is taken out from the support frame 9 while pulling out the overflow tube 13.

According to the above configuration, unlike the conventional arrangement in which the air trap is provided inside the drain chamber, a mounting structure for fixing the air trap 15 to the inner wall of the drain chamber 4 is not required, and the structure of the drain chamber 4 can be simplified. . Moreover, air trap 15 is flooded with tube 1.
Since the support frame 9 is attached to the support frame 9 so as to surround the support frame 9, the gap created between the support frame 9 and the overflow tube 13 can be effectively used as a space for arranging the air trap 15. Moreover, the support frame 9 and the air trap 15 are Since they move integrally, there is essentially no need for a gap to allow the two to move relative to each other, and the depth dimension of the drain chamber 4 can be reduced, and the volume of the drain chamber 4 can therefore be made smaller than in the past. As a result, only a small amount of washing water is required to be stored in the washing tub 2.
In addition, since the air trap 15 is arranged so as to surround the lower part of the overflow tube 13, it is possible to prevent the overflow tube 13 from collapsing and deforming as much as possible, which tends to soften when hot water is poured into it.
3, it is not necessary to use a strong and expensive material for molding, and the overall cost can be reduced. In addition, in this embodiment, since the air trap 15 is detachably attached to the support frame 9, the air trap 15 is detachably attached to the supporting frame 9.
5 can be removed from the support frame 9 for repair and replacement, and especially when the overflow tube 13 is configured to be detachable from the support frame 9 as in this embodiment, the work of attaching and detaching the overflow tube 13 is easy. Repair and replacement work for the overflow tube 13 is also facilitated since it can be carried out with the air trap 15 removed. Moreover, according to this embodiment, in particular, the elastic claw pieces 12, 12 are integrally formed on the supporting frame 9 to prevent the air trap 15 from moving upward.
The work of attaching and detaching the support frame 9 to and from the support frame 9 can be easily performed, and the work is facilitated not only during repair but also during assembly.

In this embodiment, the air trap 11 is formed in a cylindrical shape, but the shape of the air trap is not limited to this, and it goes without saying that it may be in the shape of a rectangular tube.

As described above, the present invention can simplify the structure of the drain chamber, reduce its volume, reduce the amount of washing water, and prevent tilting and deformation of the drain cylinder by using the air trap. Therefore, the overflow cylinder can be made of inexpensive materials even if they are weak in strength, reducing the overall cost, and since the air trap is removable, repair and replacement work can be done easily. We can provide equipment.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a partial longitudinal side view, FIG. 2 being an enlarged longitudinal sectional front view of the main part, and FIG. 3 being an exploded perspective view of the same. In the figure, 2 is a washing tank, 4 is a drain chamber, 6 is a drain port,
9 is a support frame, 12 is an elastic claw piece, 13 is an overflow tube (overflow tube body), 14 is an overflow port, 15 is an air trap, and 21 is a water level switch.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A supporting frame is provided in a drainage chamber formed by outwardly protruding the peripheral wall of a washing tub so as to be movable up and down, and the supporting frame is provided with an overflow port at a predetermined height position, and the lower end thereof is provided with a vertically movable support frame. In a device in which an open overflow cylinder is erected and the drain port formed in the drain chamber is opened and closed by vertical movement of the support frame, an air trap communicating with a water level switch is formed in an annular shape, and the air trap is arranged so as to surround the overflow cylinder and is detachably attached to the supporting frame. 2. Claims for Utility Model Registration characterized in that the support frame is integrally formed with an elastic claw piece, and the elastic claw piece prevents the air trap placed on the bottom of the support frame from moving upward. The washing machine according to paragraph 1.