JPH0420388Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an opening/closing device for a washing chamber cover of a dishwasher that can be slid vertically to open and close the washing chamber of a dishwasher.

[Prior Art] A dishwasher in which a washing chamber cover that covers the washing chamber is opened and closed by sliding vertically has been commonly used. There is a configuration as shown in the figure. That is, what is shown in FIG. 4 is a cleaning chamber cover 1 consisting of left and right side plates 2 and a front plate 3.
can be slid vertically along a back plate 5 fixed to the washing machine body 4, and when the washing chamber cover 1 is lowered along the back plate 5, the washing chamber cover 1, the back plate 5, and the washing machine main body are A cleaning chamber 7 is formed between the upper surface and the saucer part 6, and a cleaning liquid nozzle and a rinsing water nozzle (none of which are shown) are provided.
In a dishwasher that is equipped with a rotary arm 8 to wash dishes, etc., the rear end sides of the rotating arms 8 arranged along the outer surfaces of the left and right side plates 2 are connected to the back plate 5 with pins 9 in an upward direction. A link bar 12 is connected to the front end of the rotating arm 8 so that it can rotate.
The cleaning chamber cover 1 is connected by a pin 10, and the other end of the link bar 12 is connected to the lower edge of the side plate 2 by a pin 11, and by gripping the rotation arm 8 and moving it in the vertical direction. Furthermore, the rear end of the rotating arm 8 is made to protrude rearward from the back plate 5, and a spring 13 is interposed between the end and the lower part of the washing machine main body 4. The spring 13 makes it easy to open the cleaning chamber cover 1.

However, in the opening/closing mechanism of the washing chamber cover 1 of the conventional dishwasher, the rotating arm 8 is
Spring 1 located outside and attached to it
3 is located behind the back plate 5, a space for the spring 13 is required when installing the dishwasher.

In order to improve this problem, in recent years, a device has been developed in which the rotating arm 14 is housed within the cleaning chamber cover 1 and the spring 15 is also housed within the cleaning chamber 7, as shown in FIG. That is, in a configuration in which the cleaning chamber cover 1 is assembled so as to be slidable vertically along the back plate 5 fixed to the washing machine main body 4, brackets 16 are provided protruding from both left and right sides of the upper inner surface of the back plate 5, respectively. The left and right brackets 16 rotatably support the rear end portions of a pair of left and right rotating arms 14 whose rear end portions are connected to each other through bearings, and are arranged along the inner surface of the side plate 2. The tip of the rotating arm 14 is connected by a pin 10 to the other end of a link bar 12 which is connected to the inner surface of the lower end of the side plate 2 by a pin 11, and the tip of the rotating arm 14 is A plurality of protrusions 18 protruding toward the back plate 5 are fixed to the connecting rod 17 at the center, and each protrusion 1
8 and a plurality of hooks 19 provided on the bottom surface of the saucer part 6 on the upper part of the washing machine main body 4, and a spring 15 is interposed between each of the hooks 19, and the handle 20 attached to the front surface of the washing chamber cover 1 is grasped to open the washing chamber. It has been proposed that by moving the cover 1 upward, the cleaning chamber cover 1 can be easily slid upward with a small force by the tensile force of the spring 15.

[Problems to be solved by the invention] However, in the conventional method shown in Fig. 5 above,
By moving the rotating arm 14 and spring 15 to the inside of the cleaning chamber cover 1, the problems caused by the conventional method shown in FIG. Since the rotating arm 14 is located on the inner surface and the tip of the rotating arm 14 is connected to the lower part of the side plate 2 by the link bar 12,
2 is located in a space where dishes, etc. are placed, and when the washing chamber cover 1 comes down, the rotating arm 14 and the link bar 12 may collide with the dishes, etc., and there is a risk of damaging the dishes, etc. can be,
Further, since many springs are attached along the back plate 5, there are problems such as a large number of parts.

Therefore, the present invention is designed to prevent the rotating arm from colliding with tableware in the washing chamber when the washing chamber cover slides vertically to open and close. The aim is to make it possible to reduce the number of parts as well as to reduce the number of parts.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a washing machine for dishwashers in which a washing chamber cover is opened and closed by sliding it vertically along a back plate fixed to the main body of the washing machine. In the room cover opening/closing device, a coil spring is arranged horizontally or nearly horizontally on the top of the back plate, and the end of the rotating arm located inside the cleaning room cover is moved vertically onto the top of the back board. The rotating arm is rotatably supported, and the distal end of the rotating arm is connected to one end of the coil spring, and the other end of the coil spring is fixed to the back plate side, and further,
The coil spring exerts a restoring force in a direction that causes the tip end of the rotating arm to rotate upward so that the tip side of the rotating arm is always pressed against the ceiling surface of the cleaning chamber cover. The configuration is as follows.

[Function] The distal end of the rotating arm is connected to the coil spring arranged horizontally or nearly horizontally at the upper position of the back plate, and the other end of the coil spring is fixed to the back plate side, and the coil spring Since a twisting force is always applied to push the tip of the rotating arm upward, the tip of the rotating arm is always in contact with the ceiling surface of the cleaning chamber cover, creating an upward force against the cleaning chamber cover. When the cleaning chamber cover is lowered, the torsional force of the coil spring becomes stronger, allowing the cleaning chamber cover to be opened and closed with less force. Furthermore, since the tip of the rotating arm is always in contact with the ceiling surface of the washing chamber cover, it does not interfere with the tableware in the washing chamber.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

Figures 1 and 2 show an embodiment of the present invention, in which a cleaning chamber cover 1 is assembled so as to be slidable in the vertical direction along a back plate 5 fixed to the washing machine main body 4, and the washing chamber cover 1 is attached to the upper part of the washing machine main body 4. In a configuration in which a space surrounded by the back plate 5 and the cleaning chamber cover 1 is formed as a cleaning chamber 7, and cleaning is performed by lowering the cleaning chamber cover 1 and closing the cleaning chamber 7,
A box-shaped bracket 21 is provided on the upper inner surface of the back plate 5.
is attached in a horizontally elongated manner, and both ends of a connecting rod 22 rotatably supported by the bracket 21 are made to protrude from the bracket 21. The end portions of the rotating arm 23, which has a roller 24 vertically attached to the tip and is arranged along the inner surface of the side plate 2 of the cleaning chamber cover 1, are integrally connected to both ends of the connecting rod 22, and a pair of left and right The rotating arm 23 and the connecting rod 22 are made to be able to rotate together, and the outer periphery of the connecting rod 22 is provided with:
Two sets of coil springs 25 are arranged, each coil spring 25
is properly twisted in the loosening direction, one end is fixed to the disc 26 at the center of the connecting rod, and the other end is fixed to the bracket 21, and the coil spring 25 is constantly twisted by the force that tries to restore it in the winding direction. Rotating arm 23
is rotated in a clockwise direction in the figure, that is, in a direction that lifts up the tip end side of the rotation arm 23. Reference numeral 27 denotes a handle to be held when opening and closing the cleaning chamber cover 1.

By grasping the handle 27 and moving it up and down, the cleaning chamber cover 1 can slide along the back plate 5 and move up and down to open and close the cleaning chamber 7. However, while the cleaning chamber cover 1 is being opened and closed, the rotation arm 23 cannot be attached. The roller 24 is rolling against the ceiling surface of the cleaning chamber cover 1. The force of the roller 24 at the tip of the rotating arm 23 hitting the ceiling surface of the cleaning chamber cover 1 and pushing up the cleaning chamber cover 1 is generated when the cleaning chamber cover 1 is open, that is, it is being lifted upward. It is the smallest when the cleaning chamber cover 1 is closed, that is, when it is lowered down. This is because when pushing down the cleaning chamber cover 1, the tip side of the rotating arm 23 that is in contact with the ceiling is simultaneously pushed down, and the rotating arm 23 is rotated counterclockwise in the figure. coil spring 2
This is because 5 is twisted in the direction in which it is loosened. Therefore, when the cleaning chamber cover 1 is lowered and closed, a large force is exerted by the coil spring 25 to push up the cleaning chamber cover 1 via the rotation arm 23 and the roller 24, and the cleaning chamber cover 1 is closed. In the raised and open state, the restoring force of the coil spring 25 is the smallest, so the force pushing up the cleaning chamber cover 1 via the rotating arm 23 and roller 24 is small.

When opening and closing the cleaning chamber cover 1 and the coil spring 25
The cleaning chamber cover 1 is balanced by the strength of the twisting force and can be opened and closed with a small force.
To explain with a diagram, when the cleaning chamber cover 1 is lowered downward and closed, if the dimension between the coil spring 25 and the roller 24 is A, and the weight of the cleaning chamber cover 1 is W, then the downward A moment of xA is applied to the cleaning chamber cover 1, and in order to counter this force, the cleaning chamber cover 1 receives an upward force from the coil spring 25. Next, when the cleaning chamber cover 1 is raised and open as shown by the chain line, the cleaning chamber cover 1
Although the weight W does not change, the dimension between the coil spring 25 and the roller 24 becomes B, which is shorter than the dimension A, so the downward moment becomes W×B. At this time, the torsion angle of the coil spring 25 is smaller than the torsion angle when the cleaning chamber cover 1 is closed by θ degrees, which is smaller than the torque that the coil spring 25 can produce, and balance is achieved. This ensures balance no matter where the cleaning chamber cover 1 is placed.

In the present invention, the roller 24 at the tip of the rotating arm 23 is always in contact with the ceiling surface of the cleaning chamber cover 1 due to the force of the coil spring 25, and is configured to push the cleaning chamber cover 1 upward. Therefore, when the washing chamber cover 1 is closed, the rotating arm 23 is never located in the place where dishes are placed in the washing chamber 7, and there is no fear of colliding with the dishes as in the conventional case.

It should be noted that the present invention is not limited to the above-mentioned embodiments. For example, although two sets of coil springs 25 are attached to the connecting rod 22, the present invention is not limited to this. Although the connecting rod 22 is mounted horizontally and the coil spring 25 is disposed around the outer periphery of the connecting rod 22, the left and right rotating arms 23 may be connected in series and the connecting rod 22 may be omitted.

[Effects of the invention] As described above, according to the cleaning chamber cover opening/closing device for a dishwasher of the present invention, the coil spring is arranged in a horizontal or nearly horizontal position on the upper part of the back plate that guides the vertical movement of the cleaning chamber cover. The distal end of a rotary arm that is located inside the cleaning chamber cover and has a roller attached to its tip is rotatably supported on the upper part of the back plate, and the distal end of the rotary arm is attached to one end of the coil spring. and the other end of the coil spring is fixed to the back plate, and the coil spring is arranged so that a restoring force acts in a direction in which the tip side of the rotation arm faces upward, so that the rotation The tip of the arm is always pressed against the ceiling of the washing chamber cover, so even when the washing chamber cover is lowered and the washing chamber is closed, the rotating arm will collide with the dishes in the washing chamber. There is no risk of damaging the tableware, and the coil spring that applies upward force to the washing chamber cover via the rotating arm is placed horizontally or close to the horizontal on the top of the back plate. It is not necessary to attach many springs along the back plate as in the conventional case, and the number of parts can be reduced, and other excellent effects can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is an enlarged perspective view of the main parts, Figure 3 is a diagram explaining the relationship between the moment when the cleaning chamber cover opens and closes and the strength of the coil spring, and Figures 4 and 5 both show conventional examples. FIG. 1...Cleaning chamber cover, 2...Side plate, 4...Washing machine body, 5...Rear plate, 7...Cleaning chamber, 8,1
4, 23...Rotating arm, 24...Roller, 25
...Coil spring.

Claims (1)

[Scope of utility model registration request] In a washing chamber cover opening/closing device for a dishwasher in which the washing chamber cover is opened and closed by sliding it vertically along a back plate fixed to the washing machine body, a coil spring is placed horizontally or close to the horizontal on the top of the back plate. The distal end of the rotary arm located inside the cleaning chamber cover is supported on the upper part of the back plate so as to be freely rotatable in the vertical direction, and the distal end of the rotary arm is connected to one end of the coil spring. and fixing the other end of the coil spring to the back plate side,
Further, the coil spring has a restoring force in a direction that causes the tip end of the rotating arm to rotate upward so that the tip side of the rotating arm is always pressed against the ceiling surface of the cleaning chamber cover. A cleaning chamber cover opening/closing device for a dishwasher, characterized in that the cleaning chamber cover opening/closing device is arranged to operate.