JPS5936238Y2 - Dehydration/washing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a dehydrating and washing machine in which a brake device of a rotary tub, a drain valve, etc. are operated by a magnet.

Traditionally, this type of dehydrating/washing machine has had the problem that when the magnet is energized, the plunger collides with the magnet at high speed, producing a loud impact sound.To solve this problem, the entire magnet was covered with sound insulating material. Various measures have been taken, such as wrapping the area, but all of them are incomplete.

Recently, it has been considered to reduce impact noise by configuring the plunger to apply the spring force of a force spring to the plunger immediately before it collides with the magnet.
This configuration has the drawback that the magnet emits a whirring sound because the spring force of the deceleration spring acts on the plunger even in the attracted state.

The present invention was developed in view of the above circumstances, and its purpose is to eliminate or reduce the impact sound of the plunger by damping the plunger with an air damper, and to prevent the plunger from being absorbed by the plunger. To provide a dehydrating/washing machine which does not cause a magnet to generate a whirring sound even when the machine is in a state of dehydration, and can quickly restore an air damper with an extremely simple configuration.

The present invention will be specifically explained below with reference to Examples.

First, in the first embodiment shown in FIGS. 1 to 3, reference numeral 1 denotes a water tank suspended in an outer box (not shown), and a housing 2 is fixed to the center of the outer fitting part through a reinforcing plate 3. There is.

Reference numeral 4 denotes a rotary tank for both washing and dehydration disposed in the water receiving tank 1, and a washing shaft 6 is inserted through and supported by a dewatering shaft 5 which is directly connected to this and supported by the housing 2. A stirring blade 7 disposed at the inner bottom of the rotating tank 4 is directly connected to the upper end. Reference numeral 8 denotes a cylindrical shaft fitted to the lower end of the washing shaft 6, which is connected to the outer bottom of the water receiving tank 1. It is connected via a belt transmission mechanism 10 to a motor 9 fixed to.

11 is a clutch spring wound around the dehydration shaft 5 and the cylindrical shaft 8; 12 is a sleeve loosely fitted around the cylindrical shaft 8 and engaged with the lower winding end of the clutch spring 11; A large number of ratchet teeth 12a are formed in the portion.

Reference numeral 13 denotes a brake device for braking the rotary tank 4, which is composed of a brake band 15 tightly wound around a brake drum 14 fitted on the dewatering shaft 5.
A bent portion 15a is formed at one end.

A brake lever 16 is rotatably supported on a boss portion 2a projecting from the housing 2 via a pivot shaft 17, and a clutch lever 18 is integrally extended thereto.

A tension coil spring 19 is stretched between the protruding piece 3a formed on the reinforcing plate 3 and the brake lever 16, and this always biases the brake lever 16 to rotate in the direction of arrow A.

Reference numeral 20 designates a drain valve installed in the middle of a drain channel 21 connected to the drain port 1a of the water receiving tank 1. This is a well-known type of valve in which a valve body 23 opens and closes a valve port 24 when a valve stem 22 is operated. 23
is normally biased in the closing direction by a compression coil spring 25.

26 is a magnet made by winding a coil 28 around an iron core 27, and this is a magnet made by attaching a base frame 30 to the bottom surface of a plywood 29 attached to a reinforcing plate 3.
has been fixed through.

31 is a plunger of the magnet 26 which is loosely inserted into the iron core 27 so that it can move forward and backward, and this has stoppers 3 on both sides of one end.
When the magnet 26 is energized, it is attracted by the magnet 26 and is displaced in the direction of the arrow B until the stopper 31 a comes into contact with the iron core 27 .

Reference numeral 32 denotes a connector connected to one end of the plunger 31 via a shaft 33, at the tip of which a locking portion 32a is bent downward and a hook portion 32b is integrally extended. The locking portion 32a is locked to the other end of the brake lever 16, and the hook portion 32b is engaged to a pin 34 fixed to the valve stem 22 of the drain valve 20.

Therefore, when the magnet 26 is cut off, the drain valve 20
is held in a closed state by the spring force of the compression coil spring 25, and the brake lever 16 is at its rotation limit position in the direction of arrow A shown in FIG. 2 by the spring force of the tension coil spring 19. The brake device 13 is assembled by engaging the engaging portion 16a with the bent portion 15a of the brake band 15.
is in a braking state, and the pawl 18a provided at the tip of the clutch lever 18 is engaged with the ratchet teeth 12a of the sleeve 12 to disconnect the dewatering shaft 5 and the cylinder shaft 8 by the clutch spring 11. ing.

Each cleaning process of detergent and rinsing is performed while the magnet 26 is de-energized, so that the water receiving tank 1 (rotating tank 4)
Water is stored inside, and when the motor 9 is started, its rotation is transmitted only to the stirring blades 7 via the washing shaft 6, and a washing action is performed by a stream of hot water.

After each of the above washing steps, when the draining step begins, the magnet 26 is energized and attracts the plunger 31 in the direction of the arrow B. Therefore, in conjunction with the displacement of the plunger 31 in the direction of the arrow B, the brake lever 16 is pulled. coil spring 1
The sleeve 1 rotates in the opposite direction of arrow A against the spring force of 9.
At the same time, the engaging portion 16 a and the pawl 18 a are disengaged from the ratchet teeth 12 a of No. 2 and the bent portion 15 a of the brake band 15, and the valve rod 22 of the drain valve 20 resists the spring force of the compression coil spring 25. and move in the direction of arrow C to remove valve body 2.
3 is opened.

As a result, the brake device 13 is brought into a brake release state, the clutch spring 11 is brought into a tightened state, and the dewatering shaft 5 and the cylinder shaft 8 are connected, and the drain valve 20 is brought into an open state, and the water receiving tank 1 is brought into the open state. The water in (rotating tank 4) is drained.

Furthermore, since the dewatering process after the draining process is performed while the magnet 26 remains energized, when the motor 9 starts, its rotation is also transmitted to the dewatering shaft 5, causing the rotating tank 4 to rotate integrally with the stirring blades 7. The dewatered water is discharged through the drain valve 20 which is in the open state.

Note that the tension coil spring 25 only needs to be weak enough to return the brake lever 16 and the valve body 23 to their original positions, so the magnet 26 will not make a humming noise due to the spring force of both springs 19.25. .

Now, 35 is a frame as an abutting member, which is arranged so as to surround the magnet 26, and is a movable member that is displaced integrally with the plunger 31, that is, the plunger 3 in this embodiment.
1 itself via the shaft 33, and the frame body 35 has a substantially U-shaped protrusion 3 on the side opposite to the plunger 31.
5 a.

Reference numeral 36 denotes a bellows as an air damper formed of an elastic material into a substantially bellows shape.This has one end open and a collar 36a extending integrally on its outer peripheral surface, and a circular protrusion in the center of the other closed end. A portion 36b is integrally provided in a protruding manner.

37 is a mounting plate portion formed by bending the end of the base plate 29, which is a stationary member, at a substantially right angle to attach the bellows 36;
The bellows 36 is housed in the guide tube 38, and the collar 36a of the bellows 36 is inserted between the flange portion 38a formed on the guide tube 38 and the mounting plate 37.
6 and the guide tube 38 are fixed to the mounting plate portion 37 with screws 39.

Therefore, as the magnet 26 is energized, the plunger 31
When the stopper 31 a is suction-displaced in the direction of arrow B, the stopper 31 a
frame 35 at a position slightly before it contacts magnet 26.
The protruding portion 35a of the bellows 36 is brought into contact with the protruding portion 36b of the bellows 36 to contract the bellows 36, and the substantially central shaft of the mounting plate portion 37 is designed to direct air inside the bellows 36 outward when the bellows 36 is contracted. A small hole 40 is formed to allow the water to escape.

An intake hole 41 having a larger diameter than the small hole 40 is formed in the portion of the bellows 36 that the frame 35 comes into contact with, that is, the protrusion 36b thereof.

A compression coil spring 42 is contracted within the bellows 36 and always biases the bellows 36 in the direction of expansion, and this spring is set to have a weak spring force that promotes the restoration of the bellows 36.

Reference numeral 43 denotes a short cylindrical protective member attached to the closed end of the bellows 36 so as to be slidably fitted into the guide tube 38, and this protect member slides while being guided by the guide tube 38 as the bellows 36 expands and contracts. This prevents the bellows 36 from buckling, especially when it contracts, so that it always functions normally.

Next, the operation of the above structure will be explained in relation to the plunger 31 and the bellows 36, which are directly related to the present invention.

When the magnet 26 is energized during the transition from the detergent washing process or rinsing process to the draining process, the plunger 31
is attracted by the magnet 26 and moves at high speed in the direction of arrow B, and at a position slightly before the stopper 31 a contacts the iron core 27 , the protruding portion 35 a of the frame 35 engages the bellows 36 .
collides with the tip end surface of the protrusion 36b (see Fig. 3).

Then, at the same time as this collision, the intake hole 41 of the bellows 36 is hermetically closed by the protrusion 35a of the frame 35, so that
The air pressure inside the bellows 36 increases instantaneously and the bellows 36 contracts as the plunger 31 moves, so that the air inside is blown out only from the small holes 40.

In this case, the diameter of the small hole 40 is extremely small (0.3~0.
5 mm), a large air resistance is generated when the air flows out, and as a result, the bellows 36 is maintained at a large constant internal pressure even though it contracts, and exerts a large damping force on the plunger 31.

Therefore, when the frame body 35 collides with the bellows 36, the speed of the plunger 31 decreases rapidly, and after that, the plunger 31 moves at a low speed in the direction of arrow B while compressing the bellows 36, and the stopper 31a hits the iron core 27. It stops when it touches.

At this time, since the speed of the plunger 31 is extremely small, almost no collision noise is generated.

When the magnet 26 attracts the plunger 31, the pressure inside the bellows 36 becomes approximately equal to atmospheric pressure, and the reaction force exerted by the bellows 36 on the plunger 31 is due to its elastic restoring force and the small elasticity of the compression coil spring 42. Since it is only a generating force, the force acting on the plunger 31 in the opposite direction of arrow B increases only slightly due to the addition of the bellows 36, and there is no risk that the magnet 26 will generate a humming sound.

After the dehydration process is completed, when the magnet 26 is de-energized, the brake lever 16 and the drain valve 20 return to their original positions by the spring forces of the tension spring 19 and the compression spring 25, respectively, while returning the plunger 31 in the opposite direction of arrow B. return to the state of

Due to the return displacement of the plunger 31, the frame body 35 also moves integrally in the same direction, and the protruding portion 35a of the frame body 35 becomes the bellows 36.
The protrusion 36b separates from the protrusion 36b.

As a result, the air intake hole 41 of the bellows 36 is opened, so that the bellows 36 quickly restores its original state while sucking in outside air primarily through the air intake hole 41.

By the way, in a configuration in which the bellows 36 is not provided with an intake hole as in this embodiment and the small hole 40 is also used as an intake hole, it takes a relatively long time to restore the structure.

Even with something like this, magnet 2 is usually
There is no problem because the time from the power outage in step 6 to the next power on (equivalent to washing time and rinsing time) is more than 5 minutes, but if you operate the washing machine manually, turn it off once after draining and then immediately turn it on again. In such a case, the time from de-energization of the magnet 26 to re-energization is short, resulting in a problem that the bellows 38 does not function effectively.

In order to alleviate this problem, it is conceivable to provide an intake hole with a check valve in the bellows 36 or the like, but this has the disadvantage that the check valve is required and the structure becomes complicated.

However, in this embodiment, the frame 3 of the bellows 36
The protrusion 35 a of No. 5 contacts the part, that is, the protrusion 36
Since the intake hole 4] is formed in the bellows 36, the protruding portion 35a of the frame 35 functions as a check valve, and therefore the intake hole 4 is simply formed in the bellows 36 without the need for a check valve. By simply forming an opening in 41, the restoration operation of the bellows 36 can be speeded up, and the structure can be simplified and the number of parts can be reduced.

In addition, in this embodiment, the stopper 31 of the plunger 31 is particularly
Since the frame body 35 is made to collide with the bellows 36 slightly before a contacts the iron core 27, the minimum necessary amount is The operating amount can be obtained, and the drain valve 20 and the brake lever 16, especially the drain valve 2
0 can be opened quickly, which is advantageous in terms of shortening drain time.

Note that if there is no particular problem even if the suction speed of the plunger 31 is slow from the beginning of the suction displacement, the protrusion 35a of the frame 35 should be brought into contact with the bellows 36 from the beginning of the suction displacement of the plunger 31. It may also be a configuration.

Alternatively, the bellows 36 may be attached to the plunger 31 side, and the damping effect may be achieved by causing the bellows 36 to collide with a blocking wall (abutting member) appropriately provided on two pieces of plywood due to the suction of the plunger 31. good.

Next, FIG. 4 shows the protrusion 35a of the frame 35 and the bellows 36.
This shows a second embodiment of the present invention in which the shape of the abutting surface with the protrusion 36b of the bellows 36 is improved. , when the frame 35 comes into contact with the bellows 36, a spherical concave surface is formed; The bulge 45 is fitted into the spherical concave surface 44 and closely abuts against it.

With this configuration, airtightness with respect to the intake hole 41 can be improved.

Further, FIG. 5 showing a third embodiment of the present invention shows an air damper composed of a cylinder and a piston. In FIG. However, a small hole 47 is formed at the other end on the closed side.

Reference numeral 48 denotes a piston made of a rubber material, for example, which is slidably fitted into the cylinder 46, and an intake (L49) is formed in the portion of the piston 48 that contacts the protruding portion 35a of the frame 35, that is, the central portion thereof. ing.

A compression spring 50 is housed in the cylinder 46 and has a relatively small spring force that always urges the piston 48 toward its original position.

When the protrusion 35 a of the frame body 35 collides with the piston 48 due to the energization of the magnet 26 , the intake hole 49 is hermetically closed by the protrusion 35 a. The plunger 3 moves in the direction of arrow C while blowing out the air inside.
1 to slow down.

Then, when the magnet 26 is de-energized, the plunger 3
1 moves back together with the frame 35, thereby opening the intake hole 49.
is released, and the piston 48 quickly returns to its original position while sucking outside air into the cylinder 46 mainly from the intake hole 49 by the spring force of the compression spring 50.

Even with this configuration, the same effects as in the first embodiment can be obtained.

As explained above, the present invention has a configuration in which the plunger is decelerated by an air damper, thereby making it possible to eliminate or reduce the impact noise of the plunger, and also to generate a buzzing noise even when the plunger is in an adsorbed state. Moreover, by simply forming an air intake hole in the air damper at the abutment area with the abutment member, the abutment member can act as a check valve for the air intake hole, which is extremely simple. It is possible to provide a dehydrating and washing machine that can speed up the restoration operation of an air damper at low cost with a simple configuration.

[Brief explanation of drawings]

Figures 1 to 3 show a first embodiment of the present invention, in which Figure 1 is a vertical cross-sectional view near the bottom of the water tank of a washing machine with dehydrating function, Figure 2 is a bottom view of a portion thereof, and Figure 3 is an enlarged sectional view of the main part, and FIGS. 4 and 5 are sectional views of the main part showing the second and third embodiments of the present invention. In the figure, 4 is a rotating tank, 13 is a brake device, 15 is a brake band, 16 is a brake lever, 20 is a drain valve, 26
is a magnet, 31 is a plunger (movable member), 35 is a frame (abutting member), 36 is a bellows (air damper), 4
0.47 is a small hole, 41.49 is an intake hole, 46 is a cylinder (air damper), and 48 is a piston (air damper).

Claims (1)

[Scope of utility model registration request] The operation of the brake lever for braking and releasing the brake device installed to brake the rotary tub for both washing and dehydration is performed by a magnet equipped with a plunger for opening and closing the drain valve, etc. A contact member provided on one of a movable member that is integrally displaced with the plunger and a stationary member such as plywood for attaching the magnet, and at least immediately before the plunger contacts the magnet when the magnet is attracted to the other member. an air damper that contacts the contact member; a small hole formed in a predetermined portion of the air damper; and an intake hole having a diameter larger than the small hole formed in the contact portion with the contact member; When the magnet is attracted, the contact member and the air damper come into contact with each other, and the air damper blows out internal air from the small hole with the intake hole closed by the contact member while exerting a damping force on the plunger. The dehydrating and washing machine is characterized in that the air intake hole is opened by releasing the abutment between the abutment member and the air damper due to the return displacement of the plunger due to power cut-off of the magnet.