JPH0144467Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a tank lid tightening device.

Conventional technology Conventionally, for example, a device for tightening a lid that opens and closes an opening formed at the top of a liquid storage tank uses a spring clamp mechanism to tighten the lid to the opening of the tank in order to prevent leakage of liquid in the tank. However, with this conventional structure, the operator has to apply a very large force to the tightening device when tightening the lid, resulting in poor operability. This was extremely bad, and it also had drawbacks such as a high risk of injury to workers who could get their hands caught in the device during tightening work.

Problems to be Solved by the Invention It is an object of the present invention to eliminate the drawbacks of the conventional devices and to provide a simple and convenient tank lid tightening device.

Means for Solving the Problems In the tank lid tightening device according to the present invention, one end of the lid pressing member for pressing the lid that closes the tank opening is pivoted to one side portion of the tank opening, and the lid pressing member A grip member that can pivot in the same plane as the pivot plane of the lid holding member is pivotally attached to one end and the other side portion on the diametrically opposite side of the opening, and the other end of the lid pressing member is pivoted in the same plane as the pivoting plane of the lid holding member. A grip member is formed with a longitudinal notch that extends outward from the pivot portion and into which the other end can be inserted. It is characterized by a structure that allows it to be held in a closed position.

Effects According to the above configuration of the present invention, when the opening of the tank is closed with the lid, the other end of the lid holding member projects outward from the pivot portion of the grip member through the longitudinal notch formed in the grip member. The lid can be tightened against the tank by pushing down the grip member in the opposite direction.

Embodiment The illustrated embodiment is an example in which the lid tightening device of the present invention is applied to a chemical tank that stores a hydrating agent for a chemical dispersion machine such as a speed sprayer. A circular opening 2 is formed and the medicine can be injected into the tank through the opening 2. The opening 2 is closed by a lid 3. The lid 3 has an annular elastic packing member 4 attached around its periphery, and this packing member 4 is pressed against the peripheral edge portion 5 of the opening 2 of the tank 1 to seal the opening 2.

In the tank 1, support members 6 and 7 which protrude upward are respectively fixed near the periphery of the opening on both sides in the diametrical direction, sandwiching the opening 2 therebetween. One end 9 of a lid holding member 8 is pivotally attached to the upper end of one of the supporting members 6 via a pivot shaft 10, and the lid holding member 8 extends horizontally above the opening 2 of the tank 1 to the opposite side in the diametrical direction. The other end 11 of the lid holding member 8 extends further outward across the upper side of the other supporting member 7. Further, the lid retaining member 8 can pivot approximately 180 degrees clockwise about the pivot 10 from the closed position shown in FIG.

A shaft 12 extending downward is attached to the lower surface of the approximately central portion of the lid holding member 8, and the shaft 12 slidably passes through a hole 13 formed in the center portion of the lid 3 to open the tank 1. It extends inward from 2. A compression coil spring 14 is interposed between the lid 3 and the lid holding member 8 around the shaft 12,
The spring 14 presses the lid 3 away from the lid holding member 8, thereby pressing the sealing member 4 of the lid 3 against the peripheral edge portion 5 of the opening 2 of the tank 1 in the closed position shown in FIG.

The inner surface of the lid 3 defines a cylindrical ventilation chamber 15 in the central part with a hole 13 through which the shaft 12 passes, and the ventilation chamber 15 has a hole 16 formed in the upper part of the lid 3. It communicates with the outside through. Furthermore,
The ventilation chamber 15 is provided with a drug repellent plate 17 made of an elastic material inside. When the drug in the tank 1 is scattered into the ventilation chamber 15 due to vibrations applied to the tank 1, the repellent plate 17 removes the scattered drug from the tank. 1
Only the air that bounces back inward can communicate with the outside via the bounce plate 17 and the holes 16. The shaft 12 has a stopper 18 attached to its lower end, and the stopper 18 engages a central boss portion 19 of the spring return plate 17 to prevent the lid 3 from coming off the shaft 12.

The other support member 7 has a grip member 20 at its upper end.
One end 21 of is pivotally connected via a pivot 22,
The grip member 20 can pivot in the same plane as the pivot plane of the lid retaining member 8 . As shown in FIG. 3, the grip member 20 has an elongated notch 23 extending in the longitudinal direction from one end 21 thereof, and the grip member 20 closes the lid when the lid 3 shown in FIG. 1 is in the closed position. It overlaps the presser member 8 and extends toward the center portion of the lid presser member 8 to maintain the lid presser member 8 in the closed position. The other end portion 11 of the lid holding member 8 extends further outward from the pivot portion of the grip member 20 through the notch portion 23 of the grip member 20. Further, the length in the longitudinal direction of the notch portion 23 is formed to be larger than the length in the longitudinal direction of the other end portion 11 of the lid holding member 8 which projects outward from the one end portion 21 of the grip member 20.

When opening the lid 3 in the above-described configuration, the grip member 20 is pivoted approximately 180 degrees counterclockwise about the pivot shaft 22 from the closed position shown in FIG. At this time,
Since the other end 11 of the lid holding member 8 can pass through the notch 23 of the grip member 20, the lid holding member 8 is pivoted clockwise to close the opening 2 of the tank 1.
can be opened.

When closing the opening 2 of the tank 1 with the lid 3, the operation described above is reversed. In this case, while pressing the other end 11 of the lid holding member 8 on the opposite side of the closing side of the grip member 20 toward the tank 1 side with one hand, the grip member 20 is pushed down toward the center portion of the lid 3 with the other hand. Therefore, the danger of the operator getting his or her hand caught between the lid holding member 8 and the grip member 20 can be avoided.

Effects of the Invention According to the configuration of the present invention explained above, since the lid holding member can be provided in a long length, the lid tightening operation can be easily performed without requiring any effort based on the principle of leverage. Furthermore, since the lid holding member can be pressed against the tank by the outside of the grip member, there is no danger of the operator getting his or her hands caught when tightening the lid, and the lid tightening operation can be performed with one hand, which provides excellent effects. I can do it.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of the main part of a chemical tank of a chemical sprayer that implements the lid tightening device of the present invention, and Figure 2 is
FIG. 3 is a plan view of the lid holding member shown in FIG. 1, and FIG. 3 is a plan view of the grip member shown in FIG. 1...tank, 2...opening, 3...lid, 8...
Lid holding member, 20... Grip member, 23... Longitudinal notch.

Claims (1)

[Scope of utility model registration request] One end of a lid holding member that presses a lid that closes the opening of the tank is pivotally attached to one side portion of the opening, and the one end of the lid holding member is attached to the other side portion on the opposite side in the diametrical direction of the opening. A grip member that can pivot in the same plane as the pivot plane of the lid pressing member is pivotally mounted, the other end of the lid pressing member is extended outward from the pivoting portion of the grip member, and the like. A longitudinal notch through which the end portion can be inserted is formed in the grip member, and the grip member is tilted toward the center of the lid pressing member to hold the lid pressing member in a position for closing the lid. Features a tank lid tightening device.