JPH057195Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention is based on a lever that is locked to the center of the lid that closes the opening of the liquid storage tank, and a presser that presses the outer periphery of the lid. The present invention relates to a lid sealing device for a liquid storage tank that can be installed in an adjustable position to prevent the lid from floating up from the liquid storage tank.

(b) Prior art In Figures 8 and 9 showing the prior art, chemical liquid,
An annular gasket 4 is fixed to the inside of the lower surface of the lid 3 near the outer periphery of the lid body 3 that closes the opening 2 of the liquid storage tank 1 for storing liquid such as water, and the lower surface of the gasket 4 is fixed to the inner side of the lower surface of the lid 3 near the outer periphery of the opening 2. The flat washers W ₁ and W ₂ are fitted vertically into the pin 7 which can be penetrated vertically in the center of the lid body 3, as shown in FIG. 9. , a split pin 8 is inserted below the flat washer W ₂ to prevent the pin 7 from coming off the lid 3, and one end of the lever 9 through which the pin 7 can be inserted on the upper surface of the flat washer W ₁ (see FIGS. 8 and 9). The bulging piece 10 at the left end) is pivotally connected to a support shaft 12 that is horizontally suspended and fixed to a support piece 11 that stands up on the liquid storage tank 1, while the other end of the lever 9 (the right end in FIGS. 8 and 9) The holding piece 14 is pivotally attached to the fixed support shaft 13,
An engaging element 16, which is pivotally attached to a pin 15 attached to the holding piece 14, is removably exposed to a hook-shaped locking piece 17 that stands up on the opposite side of the support piece 11 of the liquid storage tank 1.

(c) Problems to be solved by the invention In the above-mentioned means for fixing the lid to the liquid storage tank, the lever 9 has each end attached to the support shaft 1.
2 and 13, and a flat washer is attached to the lid body 3 at the center.
They are in contact with each other through W ₁ , and the lid body 3 is placed in a state where its central portion is pressed downward by a lever 9 . (arrow y ₁ direction) Therefore, when pressure is applied to the lid 3 from inside the liquid storage tank 1, the outer periphery of the lid 3 will react to the reaction force (arrow y ₂ direction) against the downward pressing force at the center. ), and as a result, there is a risk that the gasket 4 may separate from the liquid storage tank 1, and there is a risk that the stored liquid may leak out if the liquid storage tank 1 comes into contact with a foreign object, is tilted, etc. In the case of chemical liquids, there is a problem in that they can cause unexpected damage to humans.

This idea was proposed by focusing on the above-mentioned drawbacks, and its purpose is to prevent the lid from floating up from the liquid storage tank, and to create a lid for the liquid storage tank that can maintain a sealed state at all times. It is intended to provide a hermetic device.

(d) Means for solving the problem In order to achieve the above-mentioned purpose, the lid sealing device for a liquid storage tank according to this invention has a lever attached to the lid to which a gasket that is tightly attached to the periphery of the opening of the liquid storage tank is fixed. One end of this lever is pivotally supported near the opening, and the other end is equipped with an engager that can be freely engaged with and detached from a locking piece attached to the side edge of the liquid storage tank, while the lid is secured with a plurality of pushers. In a lid sealing device for a liquid storage tank that presses against the upper surface of the body, a presser is attached to a lever that is expanded into a bifurcated shape above the lid toward the pivot side so that its setting position can be adjusted. The presser is configured to press the upper surface of the lid near the periphery behind the gasket.

(E) Function In this invention, since the lever is equipped with a pusher that presses the vicinity of the outer periphery of the lid, which is fixed at the center of the lever, the pusher that presses the lever and the pusher that pushes up the lid are attached to the lever. Maintains a good balance between pressure and
The lever and the lid can each maintain their initial set positions for a long period of time, and there is no risk that the lid will unexpectedly float up from the liquid storage tank and the liquid stored in the liquid storage tank will flow out.

(f) Examples This invention will be explained below using examples with reference to FIGS. 1 to 7. In the first embodiment, as shown in FIG. 1, three levers 21 forming a Y-shape are used.
The center of the lever 22 is fixed at the center of the lid body ₂₂ by the _same means as shown in FIG. Therefore, the pusher 23 is movable along the center direction of the lid 22, and the distance d between the lever 21 and the pusher 23 becomes shorter and shorter as it approaches the center of the lid 22. Child 23
The pressing force on the lid body 22 can be changed as appropriate. In the case of FIGS. 3 and 4 of the second embodiment, the pusher 23 fits and covers the lever 21 at an appropriate position, and the setting position of the pusher 23 can be adjusted as necessary. As shown in FIG. 3, notches a are provided on each side edge to prevent unexpected movement of the presser 23. Note that the presser 2
3 can be easily pulled out from the lever, making it easy to replace it with a new one or change the mounting position.

In the case of Fig. 7, lever 3 forming a V-shape is shown.
The only difference from the case in Fig. 1 is that the center of the connecting piece C, which is horizontally suspended and fixed between the parts 1 and 31, is fixed to the center of the lid body 32 as in Fig. 9, and the other points are the same. Since they are the same, their explanation will be omitted.

The parts in each of Figures 1 and 7 are
As shown in Figure 6, a spherical inner wall surface is formed above the support 42 that stands up on the support plate 41 attached to the liquid storage tank T, and the ball S attached to the end of the lever 21 or 31 is rotated here. A so-called ball joint type may be adopted in which the fittings are movably fitted.

In the figure, 25 is a support piece, 33 is a presser, q ₁ and q ₂ are support shafts f ₁ and f ₂ are pins, and u ₁ and u ₂ are washers.

(g) Effects This invention has the structure described above, so the first
In the case of the embodiment, the outer peripheral edge of the lid body 22 is pressed by a pusher 23 fixed to the lower surface of the lever 21 (in the direction of arrow _Y3 ), and each of these pushers 23 is pressed by a support at the end of the lever 21. Since it is located near the axis q ₁ and the position where the reaction force (directions of arrows y ₄ and y ₅ ) acts on the support axis q ₁ and the gasket 24 is close to each other, the lever 21 and the lid body 22 are Since the pressing forces exerted can maintain a balance with each other, there is little deflection, and the lever 21 and lid body 22 are able to maintain their initial set positions for a long period of time even when receiving pressing forces from the inside of the liquid storage tank T. Moreover, compared to the conventional case of a single lever, the lever 21 itself suffers less fatigue, so it can withstand long-term use, and
By forming the presser 23 from an elastic material such as rubber, the lid body 22 will not swing unnecessarily, and there is no risk of damage to the lid body 22 itself. Since the lid body 22 can be opened and closed by engaging or disengaging the engaging member 16 with the locking piece 17 as shown in FIG. 9 in the same way as the opening/closing operation, the conventional opening/closing mechanism can be used as is. In addition to being convenient for the user, the lever 2 of the pusher 23
Since the set position to 1 can be adjusted as necessary, the pressing force applied by the presser 23 to the lid body 22 can be changed as appropriate, and the presser 23 can also adjust the pressure applied to the seal 24 by the presser 23.
Since the upper surface of the lid body 22 at the back is pressed,
It is possible to prevent the cover body 22 from floating up unexpectedly from the liquid storage tank T, and moreover, it is possible to prevent the nut _n2 from loosening or the pusher 2 to adjust the set position.
3 itself is extremely easy to grasp and transfer, and the operator does not feel particularly troubled, and adjustments can be made in a short time. It has the following advantages.

In addition, in the case of Fig. 7, the lever 31 formed in a V-shape is adopted, and its function and effect are the same as in the case of Fig. 1. Since the angle θ formed by ₂ and the lever 31 is closer to 90 degrees than in the first embodiment, the force applied to the support shaft q ₂ from an unreasonable direction is reduced, and there is no risk that the support shaft q ₂ will be deformed. There will be less

[Brief explanation of the drawing]

Fig. 1 is a plan view of the first embodiment, Fig. 2 is an enlarged cross-sectional view taken along the - line in Fig. 1, Fig. 3 is a plan view of main parts of the second embodiment, and Fig. 4 is a - line in Fig. 3. 5 is a front view of another support mechanism at the left end of the lever, FIG. 6 is a plan view of the same as above, FIG. 7 is a plan view of another type of attachment of the lever to the lid, and FIG. 8 is a conventional type. FIG. 9 is a sectional view taken along the line -- in FIG. 8. 21, 31... Lever, 22, 32... Lid body,
23, 33...presser, T...liquid storage tank, h...
...Opening, 24...Patsukin.

Claims (1)

[Scope of utility model registration request] A lever is attached to the lid with a gasket fixed to the periphery of the opening of the liquid storage tank. One end of this lever is pivoted near the opening, and the other end is attached to a locking piece attached to the side edge of the liquid storage tank. In a lid sealing device for a liquid storage tank that includes a removable engager and presses the upper surface of the lid with a plurality of pressers, the lid is expanded into a bifurcated shape above the lid toward the pivot side. A lid sealing device for a liquid storage tank, wherein a presser is attached to a lever whose setting position can be adjusted, and the presser is used to press an upper surface near the periphery of the lid behind the gasket.