JP2590402Y2 - Opening / closing lid device for containers with open tops - Google Patents

Description

[Detailed description of the invention]

[0001]

The open / close lid device for a container having an open upper end according to the present invention is used, for example, for opening and closing an upper end opening of a cleaning tank of an ultrasonic cleaning device.

[0002]

2. Description of the Related Art Ultrasonic cleaning apparatuses have been widely used for cleaning objects to be cleaned such as integrated circuits, molds, and medical equipment. Cleaning work with ultrasonic cleaning equipment
The cleaning is performed by applying ultrasonic vibration to the cleaning liquid in a state where the object to be cleaned is immersed in a cleaning liquid such as an organic solvent or ultrapure water injected into the cleaning tank. The washing tank is a bottomed cylindrical container having an open upper end, and the upper end is closed by a lid plate during the washing operation. As a cover plate opening / closing mechanism, a structure is generally used in which one edge of the cover plate is hinged to the side of the upper end opening by a hinge.

[0003]

However, in the opening / closing lid device incorporated in the conventional ultrasonic cleaning apparatus, the opening / closing operation of the lid plate is troublesome, or the opened lid plate carries the object to be cleaned. However, it was difficult to carry out the work, and it was difficult to automate the cleaning work.

[0004] That is, the pressure in the cleaning tank of the ultrasonic cleaning apparatus is slightly higher than the atmospheric pressure during the cleaning operation. Therefore, the lid plate needs to be one that does not float, regardless of the pressure increase in the cleaning tank.However, in order to simplify the structure of the opening / closing lid device and to facilitate the opening / closing operation, particularly when the lid is closed. A mechanism for holding down the lid plate is not provided, and the lid plate itself is made heavy to prevent the lid plate from rising.

For this reason, in the case of the conventional structure in which one edge of the lid plate is simply pivotally supported by a hinge, a force is required to lift the lid plate in order to release the upper end opening. For some, the task itself was difficult. When the cleaning operation is to be automated, the object to be cleaned is conveyed to the left and right of the ultrasonic cleaning device by an automatic conveyance device. If it is located, it will be a hindrance to the transport operation, and it is difficult to automate the cleaning operation.

The lid opening and closing device for a container having an open upper end according to the present invention has been devised in view of the above-mentioned circumstances.

[0007]

According to the present invention, there is provided an opening / closing device for a container having an open upper end, a horizontal surface portion that is long in the front-rear direction, a container having an upper end opened in the front half of the horizontal surface portion, A lid plate large enough to cover the upper end opening, a pair of vertical support walls fixed to both left and right ends of the lid plate, a front pivot provided at a front end of each vertical support wall, and each vertical A rear pivot provided at the rear end of the support wall, a pair of left and right front swing arms pivotally supporting respective intermediate lower portions on each front pivot, and a left and right direction at a lower end of each front swing arm. , A front support wheel pivotally supported by each front axle, a handlebar provided by connecting the upper ends of the front swing arms to each other, and A pair of left and right rear swing arms, each of which is pivotally supported, is provided at the lower end of each rear swing arm in the left-right direction. The rear axle, the rear support wheel pivotally supported by each rear axle, and the front end of a part of each of the front swing arms that deviates from the front pivot in the vertical direction. A pair of left and right connecting rods pivotally supporting the rear end at a part of the side swing arm deviating from the rear pivot in the same direction as the front end, and the swing range of each of the front swing arms. In the state where the front side, the rear side, and a stopper that restricts each support wheel to a position slightly excessive from the lower end position, and the upper end opening of the container and the lower surface of the lid plate face each other,
The container is provided with a packing which surrounds an upper end opening of the container and is sandwiched between the horizontal surface portion and the cover plate as the cover plate is lowered.

[0008]

The operation of the opening / closing lid device for a container having an open upper end according to the present invention constructed as described above is as follows. When opening and closing the chain, the pair of left and right front swing arms is swung in a predetermined direction by operating the handle bar until further swing is prevented by the stopper. In this state, the pair of front support wheels on the left and right sides is slightly overshot from the lower end position, and is held at the same position. The pair of left and right rear swing arms also swing in the same direction as the front swing arm via the connecting rod,
The rear support wheel also descends to almost the lower end position.

As a result, the front and rear support wheels press the upper surface of the horizontal surface downward, and the lid plate rises as a reaction. If the handlebar is pushed and pulled in the front-rear direction in this state, the cover plate is retracted from above the upper end opening of the container based on the rolling of the front and rear sides and the respective support wheels. Can be entered.

When the upper end opening of the container is closed, the handlebar is operated in the opposite direction with the lid plate advanced above the upper end opening of the container, and a pair of left and right front swing arms is provided. Is swung in the opposite direction to raise a pair of left and right front support wheels and a pair of left and right rear support wheels. As a result,
On the rear side, each support wheel separates from the upper surface of the horizontal surface portion, and the support force of the cover plate by each support wheel is lost, and the cover plate descends. In this state, the packing provided around the upper end opening is sandwiched between the lower surface of the lid plate and the upper surface of the horizontal surface portion.

[0011]

1 to 4 show an embodiment of the present invention. On the upper surface of the case 1 that constitutes the ultrasonic cleaning device, a horizontal surface portion 2 that is long in the front-rear direction (the left-right direction in FIGS. 1 and 3 and the front-back direction in FIGS. The upper end of a cylindrical cleaning tank 3 with a bottom, which is a container having an open upper end, is open to the front half (the left half in FIG. 1) of the horizontal surface 2. A cover plate 4 made of a thick metal plate, which is large enough to cover the upper end opening of the washing tank 3, is provided above the horizontal surface portion 2 so as to be displaceable in the front-rear direction.

On both left and right ends of the cover plate 4, supporting members 5, 5 formed by bending a steel plate having sufficient rigidity are provided.
It is fixed by welding. Each of the support members 5, 5 is composed of a support portion 6, 6 having a U-shaped cross section with an open lower portion, and fixed portions 7, 7 bent at right angles from one side of each of the support portions 6, 6 to the side. The fixing portions 7 are welded to the cover plate 4 with the support portions 6 projecting from the left and right side edges of the cover plate 4.

[0013] The respective support portions 6, 6, the horizontal plate portion 8, this
And vertical plate portions 9, 9 bent downward at right angles from both left and right edges of the horizontal plate portion 8. Each of the vertical plate portions 9 functions as a vertical support wall. That is,
A front pivot 10 is extended to the front end of each of the vertical plates 9, 9, and a rear pivot 11 is extended to the rear end of each of the vertical plates 9, 9. It is provided as follows.

The front pivots 10 pivotally support lower portions of the pair of left and right front swing arms 12 and 12 at the intermediate portion. Front axles 13, 13 are provided at the lower ends of the front swing arms 12, 12, respectively, in the left-right direction, and the front support wheels 14, 14 are pivotally supported by the front axles 13, 13, respectively. doing. Also, each front swing arm 12, 1
The upper ends of the front swing arms 1 are connected to each other by a handlebar 15, and the front swing arms 1
2 and 12 are swingable in synchronization with each other.

On the other hand, the upper ends of a pair of left and right rear swing arms 16 are pivotally supported on the respective rear pivots 11.
At the lower end of each rear swing arm 16, a rear axle 17 is provided in the left-right direction, and each rear axle 17 pivotally supports a rear support wheel 18, respectively.

The front ends of a pair of left and right connecting rods 19, 19 are pivotally supported at the outer ends of the front axles 13, 13, respectively. ,
Each of the rear axles 17 is pivotally supported at the outer end.

A projection 20 is formed on the rear side of the lower end of each of the front swinging arms 12 by screwing a screw or the like, and the tip of the projection 20 and the lower surface of the horizontal plate 8 are connected to each other. A stopper that limits the swing range of each of the front swing arms 12, 12 is configured by being able to abut. Further, by slightly cutting off the front end of the horizontal plate portion 8, each of the front swing arms 12 is rotatable above the horizontal plate portion 8.

Therefore, the front swing arms 12, 12 are
As shown by the solid line in FIG. 3, the middle portion of the rear surface abuts on the front edge of the horizontal plate portion 8, and as shown by the chain line in FIG. It is swingable between a state in which it abuts against the lower surface of the unit. Then, the protrusion 20
When the front end of the support wheel 14 abuts against the lower surface of the front end of the horizontal plate portion 8, the support wheels 14 and 18 are slightly excessively past the lower end positions (passed through the bottom dead center).

On the other hand, an annular packing 21 is located at a position surrounding the upper end opening of the washing tank 3 in a part of the horizontal surface portion 2.
Is installed. Further, guide rails 22 are provided on both left and right ends of the upper surface of the horizontal surface portion 2 in the front-rear direction.
(See FIG. 4; omitted in other drawings.) By restricting the positions of the support wheels 14 and 18 in the left-right direction.

The operation of the opening / closing lid device for a container having an open upper end according to the present invention constructed as described above is as follows. When performing the opening and closing work, the pair of left and right front swing arms 12 and 12 is swung counterclockwise in FIGS. 1 and 3 by depressing the handle bar 15, and as shown by a chain line in FIG. The tip of the projection 20 is brought into contact with the lower surface of the front end of the horizontal plate 8. On this occasion,
As described below, the lid plate 4 is raised against its weight, but the force required for the work is small due to the principle of leverage.

When each of the front swing arms 12, 12 is rotated to the state shown by the chain line in FIG. 3, a pair of left and right front support wheels 1 is formed.
4 and 14 are slightly overshoots from the lower end position. In this state, a force is applied to each of the front swing arms 12 and 12 in a direction to swing the front swing arms 12 and 12 counterclockwise in FIGS. 1 and 3 based on the weight of the lid plate 4 and the like. . Accordingly, the front swing arms 12, 12 and the front support wheels 14, 14 are provided.
Is held at a position slightly overrunning the lower end position. Also, a pair of left and right rear swing arms 16 are connected to each other through the connecting rods 19, 19, similarly to the front swing arms 12, 12.
3, the rear support wheels 18 are also lowered almost to the lower end position, and are held at the same positions.

As a result, the front wheels, the rear wheels, and the support wheels 14, 18
Presses the upper surface of the horizontal surface portion 2 downward, and as a reaction, the lid plate 4 rises. In this state, when the handlebar 15 is pushed and pulled in the front-rear direction, the cover plate 4 is retracted from above the upper end opening of the washing tank 3 based on the rolling of the front and rear sides and the support wheels 14 and 18. Alternatively, it can enter above the upper end opening.

When closing the upper end opening of the washing tank 3, first, the cover plate 4 is made to enter above the upper end opening of the washing tank 3. A stopper member 23 is fixed to the front end of the upper surface of the horizontal surface portion 2. If the cover plate 4 is pulled forward until the front edge of the cover plate 4 abuts against the stopper member 23, the cover plate 4 and the packing 21 face each other.

Therefore, with the lower surface of the cover plate 4 and the packing 21 facing each other, the handlebar 1
5 is pulled up, and the pair of left and right front swing arms 12, 12 is swung clockwise in FIGS. Along with this swing, as shown by the solid line in FIG. 3, a pair of left and right front support wheels 14, 14 is provided.
In addition, the pair of left and right rear support wheels 18 rise. As a result, the support wheels 14 and 18 separate from the upper surface of the horizontal plate portion 2,
The support force of the cover plate 4 by the support wheels 14 and 18 is lost,
This lid plate 4 descends. In this state, the packing 21 provided around the upper end opening is connected to the lower surface of the lid plate 4 and the horizontal surface portion 2.
To maintain the airtightness in the cleaning tank 3.

Although not shown, the packing 21 for maintaining the airtightness in the cleaning tank 3 may be provided on the lower surface of the cover plate 4 instead of the upper surface of the horizontal surface portion 2. Also, the rear swing arm 16
Can be extended above the rear pivot 11 so that the rear end of the connecting rod 19 can be pivotally supported on the upper end of this extension. In this case, the front end of the connecting rod 19 is pivotally supported at a position above the front pivot 10 at an intermediate portion between the front swing arms 12. At the rear end of the horizontal plate 8, the upper part of the rear pivot 11 is cut off.

[0026]

[Effect of the Invention] The opening / closing lid device for a container having an open upper end according to the present invention is constructed and operates as described above, but the heavy lid plate can be opened and closed with a light force and the opening is opened. The cover plate is fully retracted to the side of the opening. Therefore,
In addition to being able to easily open and close the cover plate even by a weak worker, it is also easy to automate the cleaning work.

[Brief description of the drawings]

FIG. 1 is a schematic vertical side view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 2;

FIG. 4 is an enlarged view of a portion C in FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Horizontal surface part 3 Cleaning tank 4 Cover plate 5 Support material 6 Support part 7 Fixing part 8 Horizontal plate part 9 Vertical plate part 10 Front pivot 11 Rear pivot 12 Front swing arm 13 Front axle 14 Front support wheel 15 Handlebar 16 Rear swing arm 17 Rear axle 18 Rear support wheel 19 Connecting rod 20 Projection 21 Packing 22 Guide rail 23 Stopper member

Claims (1)

(57) [Scope of request for utility model registration] 1. A horizontal plane portion extending in the front-rear direction, a container having an upper end opened in the front half of the horizontal plane portion, a lid plate having a size capable of covering an upper end opening of the container, and left and right sides of the lid plate A pair of vertical support walls fixed to both side ends, a front pivot provided at a front end of each vertical support wall, a rear pivot provided at a rear end of each vertical support wall, and each front pivot A pair of left and right front swing arms pivotally supporting the lower portion of each intermediate portion,
A front axle provided at the lower end of each front swing arm in the left-right direction, and a front support wheel pivotally supported by each front axle;
A handlebar provided by connecting the upper ends of the front swing arms to each other, a pair of left and right rear swing arms pivotally supported by the respective rear pivots, and a pair of rear swing arms. A rear axle provided in the lower end portion in the left-right direction, a rear support wheel pivotally supported by each rear axle, and a part of each of the front swing arms vertically disengaged from the front pivot. A pair of left and right connecting rods pivotally supporting the front end thereof at a portion thereof and a rear end thereof at a portion of each of the rear swing arms deviating from the rear pivot in the same direction as the front end; A stopper that limits the swing range of each front swing arm to the front side, the rear side, and a position where each support wheel slightly overshoots the lower end position, and the upper end opening of the container and the lower surface of the lid plate face each other. In this state, the container is surrounded around the upper end opening of the container, and is sandwiched between the horizontal surface portion and the cover plate as the cover plate is lowered. It is the and a packing container of the lid device upper end opened.