JPS6035159B2 - Dehydrator safety device - Google Patents

Description

[Detailed Description of the Invention] The present invention is designed to turn off the power and stop the operation of a dehydrator or single-tub type dehydrating washing machine when abnormal vibration occurs during dehydration or when the lid is opened during dehydration. Concerning the safety equipment used.

The following is a description of a tub-type dehydrating washing machine based on one embodiment. 1 is a machine frame with a washing and dehydrating tank 2 inside, and an outer tub 3 is attached to the outer periphery of the machine frame from the upper end of the iso frame 1 with a hanging rod 4. suspended elastically.

A rotary blade 5 is provided in the center of the washing and dehydrating tank 2, and a mounting base 6 is attached to the bottom of the outer tank 3.
A bearing case 7 and a drive motor 7' are provided in the bearing case 7 and the drive motor 7'. 8 is a control box with a timer (not shown) and a safety device installed inside, and 9 is a lid with a shaft 10.
Rotates around.

Here, the structure of the safety device will be explained. Reference numeral 11 is a mounting base, and a safety switch 13 for stopping the operation during dewatering is attached to a bent piece 12 at the end of the mounting base.

A switch lever 15 is provided on the mounting base 11 and has one end pivoted 143 so as to be rotatable, and the other end 16 of the switch lever 15 faces the push pin 17 of the safety switch 13 to open and close the safety switch. Reference numeral 18 designates an actuation lever, and its middle part is pivoted 19 to the switch lever 15. A safety lever 21 is rotatably supported 20 at one end of the actuation lever I8. The protrusion 23 of the switch lever 15 is engaged with the formed through hole 22, and the lower end of the safety lever 21 passes through the mounting base 11 and approaches the outer tank 3.

Reference numeral 24 denotes a projection piece 2 which is a tension spring and is formed below the pivot portion 20 of the safety lever 21 with the operating lever 18.
5 and a projecting piece 27 of a rising piece 26 formed on the mounting base 11 through a through hole 28 of the switch lever, and the tension spring 24 is perpendicular to the safety lever 21. It applies a component force, uses the pivot portion 20 as a fulcrum to urge the upper end of the safety lever 21 in the direction of engagement with the switch lever 15, and applies a horizontal component force to the actuation lever 18. The horizontal component force applied to the switch lever 15 is applied to the switch lever 15 with the pivot point 14 as the fulcrum.
A rotational force is applied to open the safety switch 13 (the rotational force in the anti-Japanese direction in FIG. 2).

29 is a terminal of the safety switch, and 30 is a cover that covers the safety switch 13.

Furthermore, a lid bar 32 is provided above the operating lever 18 and has one end attached to a support 31, and the other end of the lid bar 32 is engaged with and disengaged from the lid 9.
Get exercised by the opening and closing movements.

Reference numeral 33 denotes an adjustment screw, which passes through the through hole 34 of the lid bar 32 and is screwed onto the actuating lever 18.
A stopper 35 against which the lid lever 32 rests is located between the lid bar 32 and the operating lever 18 and is integrally formed therewith.

A compression spring 38 is provided between the head 36 of the adjustment screw 33 and the cover bar 32 via upper and lower washers 37, 37. This compression spring 38 covers the cover bar 3
2 toward the operating lever 18 side, and is set as a compression spring stronger than the operating force (closing force) of the safety switch. Further, the compression spring 38 may be formed by forming a protrusion (not shown) from the upright piece 26 and provided between this protrusion and the lid bar 32. Next, the operation will be explained. During washing, only the rotary blade 5 rotates, and during dewatering, the washing and dehydrating tub 2 is rotated to perform the dehydrating work.

First, when the lid 9 is opened, the lid bar 32
is pressed down by the compression spring 38 to the position where it contacts the stopper 35, and the safety lever 21 is also pressed down by the spring 2.
4, the lid side end of the operating lever 18 and the mounting base 1
1 and the switch lever 15 is rotated counterclockwise in FIG. 2 by the spring 24 about the pivot point 24, so that the safety switch 13 is in an open state.

When the lid 9 is closed from this state, the lid 9 is rotated and the lid bar 32 is suspended in the middle. Due to the engagement between the lid 9 and the lid bar 32, the lid bar 32 is pressed by the compression spring 38, and the lid bar 32 and the actuating lever 18 are pressed against the stopper 35, and the actuating lever 18 is moved while the lid bar 32 and the operating lever 18 are integrated. The safety lever 21 rotates clockwise around the pin fulcrum 19, and as the operating lever 18 rotates, the safety lever 21 pivoted 20 to the operating lever 18 moves downward against the spring 24, pivoting the switch lever 15. It is rotated clockwise about the fulcrum 14, and its end 16 presses the pusher ring 17 of the safety switch 13. In this state, when the tip of the lid 9 is closed to an angle of about 50 degrees from the clothing insertion opening 40 of the top plate 39, the weave 16 of the switch lever 15 closes the safety switch 13 and energizes the motor 7'. be done. At this time, the lid bar 32 remains in contact with the stopper 35. (Dotted line state in Fig. 2) When the lid 9 is further closed, the pusher bar 17 is completely pressed, and only the lid bar 32 compresses the compression spring 38 and independently clocks the operating lever 18 around the pivot point 31. Stopper 3 is rotated in the direction
5 and the lid 9 is completely closed. That is, the compression spring 38 absorbs the force further applied by the cover bar 32 by the cover 9 after the safety switch 13 is closed until the cover is completely closed, and does not apply more force than necessary to the safety switch 13. In addition, the lid bar 3
The displacement of the engagement portion with the lid 9 of No. 2 gives an equivalent displacement to the switch lever 15 via the actuating lever 18 and the safety lever 21, thereby reliably operating the safety switch 13. It also serves as a stopper.

When abnormal vibrations occur due to uneven distribution of clothes during dehydration, the outer tank 3 as well as the dehydration tank 2 shakes greatly, and when the outer tank 3 collides with the safety lever 21, the safety lever 21 rotates around the pivot 20. The protrusion 23 of the switch lever 15 and the through hole 22 are rotated counterclockwise as shown by the iron line in FIG.
is disengaged, and the switch lever 15 becomes the operating lever 1.
8 is rotated counterclockwise around the pivot point 14 by the rotational force due to the horizontal component of the tension spring 24 applied to the tension spring 24, and the safety switch 13 is opened to stop the operation and ensure safety against abnormal vibrations.

Here, when the lid 9 is opened to return the disengaged state between the safety lever 21 and the switch lever 15 to the original state, the lid 9 is disengaged from the lid bar 32, and the lid 9 is disengaged from the lid bar 32. The safety lever 21 is raised by the vertical force of the tension spring 24, and the operating lever 18 is also rotated counterclockwise about the pivot point 19 to close the mounting base. I will support the 11th.

When the safety lever 21 moves upward, the through hole 22 and the protrusion 23 of the switch lever are engaged again by the tensile force of the spring 24 (because the safety lever is always biased clockwise), returning to the original state. do. Then, when the lid 9 is closed after uniformly distributing the clothes in the dehydration tank 2, the switch lever 15 is activated via the operating lever 18 and the safety lever 21 due to the engagement of the lid 9 and the lid bar 32 in the same manner as described above. It is rotated clockwise to close the safety switch 13 again and dehydration operation continues.

On the other hand, when the lid 9 is opened during the dehydration operation, the lid 9 and the lid bar 32 are disengaged, the lid bar 32 supports the stopper 35, and the safety lever 21 pulls the tension spring 24.
, the operating lever 18 also rotates counterclockwise about the pivot point 19, and at the same time the switch lever 15
The safety lever 21 rotates counterclockwise about the phase support 14 to release the push button 17 of the safety switch, open the safety switch 13, and stop the operation.

Now, in this type of safety device, due to the dimensions of the device itself, variations in assembly, and variations in assembly to the equipment, the time when the safety switch h3 is closed (opened) is the opening/closing angle of the lid 9 (the opening/closing angle of the lid 9). For safety reasons, all devices are designed to operate the safety switch 13 at an opening/closing angle of approximately 50 mm (hereinafter referred to as the specified opening/closing angle), with the distance between the tip of the lid and the clothing input opening. It is necessary to adjust it so that it closes (opens).

To explain this adjustment, when the tip of the diamond 9 is fixed at the specified opening/closing angle and the lid bar 32 and the lid 9 are engaged, the end 16 of the switch lever 15 completely presses the push button 17 of the safety switch. If the safety switch 13 is already closed when the lid is pressed, it means that the safety switch 13 is closed (opened) at an angle greater than the specified opening/closing angle of the lid, which is inconvenient from a safety standpoint. In this case, the adjustment screw 33
When loosened, the threaded part of the actuating lever 18 lowers and the distance from the lid bar 32 increases, and the actuating lever 18
rotates counterclockwise about its pivot point 19, and the safety lever 21 moves upward.

The upward movement of the safety lever 21 causes the switch lever 15 to rotate counterclockwise about the pivot point 14, causing its end 16 to rise, and by loosening the adjustment screw 33 until the safety switch 13 engages. The safety switch 13 can be adjusted to open (close) at a specified opening/closing angle of the lid 9. Furthermore, when the lid 9 is fixed at the specified opening/closing angle, the end 16 of the switch lever 15 is still not connected to the safety switch 13.
If the push button 17 is not pressed and the safety switch 13 is open, tightening the adjustment screw 33 will cause the switch lever 15 to move to the operating lever 18 in the opposite manner.
If the adjustment screw 33 is rotated clockwise via the safety lever 21 and its end 16 is lowered to open the safety switch 13, the safety switch 13 will be closed at the specified opening/closing angle of the lid 9. It can be adjusted to create (open).

That is, by operating the adjustment screw 33, the lid bar 32 is actuated to change the distance from the bar 18, and by displacing the end 16 of the switch lever via the safety lever 21, the lid 9 is adjusted. This adjustment is made so that the safety switch 13 can be opened and closed at a specified opening and closing angle.

On the other hand, the lid bar 32 comes into contact with the stopper 35 provided on the adjustment screw, and maintains a distance between the lid bar 32 and the actuating lever 18, even when the lid 9 is wide open (the lid and the lid bar are in contact with each other). The operating lever 18 can be displaced and adjusted by operating the adjustment screw 33 even when the lid is not engaged (the lid is not engaged), and adjustment is possible. Since there is no need to operate the spring while gradually compressing it, there is no need to consider variations in the strength of the compression spring.

Therefore, the present invention has the above-mentioned structure, so that when the lid is opened during dehydration and abnormal vibration occurs, the safety switch is opened to stop the dehydration operation, thereby preventing danger, and furthermore, the lid is opened after activation during abnormal vibration. It is convenient to operate because the return action is performed by this.

Furthermore, by tensioning only one tension spring between the safety lever and the attachment, the safety lever is operated with an upward force due to a restoring force and a vertical component of force, and the bar is operated with a horizontal component of force. It is possible to apply rotational force to each switch lever by its horizontal component force to ensure reliable operation.The number of parts is small, no unnecessary force is applied to each lever, the structure is simplified, and the cost is reduced. Since the lever is pivotally supported by the switch lever in the middle,
The displacement of the lid-engaging part of the lid-closing bar and the displacement of the safety switch side end of the switch lever via the actuating lever and safety lever are equal, and the displacement of the lid-closing bar due to opening and closing of the lid is wasted as it is. It is possible to transmit the information to the switch lever without any problem, making the operation of the safety switch even more reliable.
There is no malfunction.

Further, by operating the adjustment screw, the distance between the lid lever and the operating lever is changed, and the end of the switch lever is displaced via the safety lever, so that the safety switch is adjusted to open and close at a specified opening/closing angle of the lid. Compared to conventional products, which have to move the safety switch one by one and are difficult to adjust, it is convenient because adjustments, including fine adjustments, can be made with a simple operation of the adjustment screw.

Additionally, the compression spring absorbs the force applied to the lid bar between the time the safety switch is closed and the lid is completely closed, thereby preventing excessive force from being applied to the safety switch and preventing damage to the safety switch. By providing this compression spring between the adjusting screw head and the cover bar, it is possible to prevent the adjusting screw from loosening.

On the other hand, by providing the stopper, it is possible to maintain a distance between the lid bar and the operating lever by making contact with the stopper, so that when the lid is closed, there is a distance between the diamond and the lid bar when they engage. Since there is no need to operate the compression spring while gradually compressing it, the compression spring only has to absorb the force applied to the cover bar, and there is no need for it to contribute to the adjustment action, and the strength of the compression spring can be reduced. There is no need to take into account variations in the spring strength, and it is sufficient to simply set the spring to be stronger for the safety switch operation.In addition, there is a distance between the stopper and the actuating lever so that the cover bar contacts the stopper and the cover bar and the actuating lever do not need to be considered. This device has unique functions and effects, such as being able to easily make adjustments simply by maintaining a distance between them and changing that distance.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view of a single-tub dehydrating washing machine, FIG. 2 is a sectional view of a safety device, and FIG. 3 is a perspective view of the safety device. 2... Dehydration tank, 9... Lid, 11...
...Mounting base, 13...Safety switch, 15.
...Switch lever, 18 ... Actuation lever, 20 ... Pivotal part, 21 ... Safety lever, 24 ... Tension spring, 32 ...・・・
...Lid bar, 33...Adjustment screw, 35...
...Stopper, 38...Compression spring. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. A mounting base on which a safety switch for stopping operation of the dehydrator is attached, and a switch lever having one end rotatably supported on the mounting base and the other end opening/closing the safety switch. an operating lever whose middle part is pivotally supported by the switch lever; and an operating lever rotatably supported by one end of the operating lever, the upper end of which engages with the switch lever, and the lower end of which is located on the outer periphery of the dehydration tank. a safety lever; a lid lever having one end pivoted to the operating lever and the other end engaging and disengaging from the lid; an adjustment screw provided to adjust the distance between the lid lever and the operating lever; A safety device for a dehydrator comprising a compression spring configured to move together with the lid lever, and a tension spring inserted between a mounting base and a lower portion of the pivot point of the safety lever with the operating lever. 2. Positioning and pivoting the lid lever above the operating lever, passing through the lid lever and screwing the adjustment screw into the operating lever, and biasing the lid lever toward the operating lever with the compression spring; 2. A safety device for a dehydrator according to claim 1, further comprising a stopper provided between the lid lever and the operating lever, with which the lid lever comes into contact. 3. The safety device for a dehydrator according to claim 2, wherein the compression spring is provided between the adjusting screw head and the lid lever. 4. The safety device for a dehydrator according to claim 2, wherein the stopper is provided on an adjustment screw.