JPS5849995Y2 - Lightweight opening/closing lid - Google Patents

Description

[Detailed description of the invention] This invention relates to a lightweight opening/closing lid that can move and easily and accurately cover the upper openings of various tanks while maintaining constant parallelism. To provide a lightweight opening/closing lid that slides along the sliding surfaces on both sides of the top side in a straight line using a slide band, is lightweight, has a sealing effect, and is easily rolled up smoothly into an accurate position. It was sunlight.

The liquid in various conventional tanks, especially metal pickling tanks or degreasing tanks, is often heated and, if operated in the open without a cover, can cause evaporation and mist formation. Not only do the harmful gases released contaminate the workplace, but they also lead to loss of heat and processing fluids.

In order to prevent this, it is possible to install a lid, but in the case of a continuous processing tank, opening and closing is infrequent and this is not a big problem. In batch work such as taking out processed items, opening and closing is often required, so it is important to find a lightweight, inexpensive method that can be opened and closed quickly, accurately, and easily. An important issue is whether a shielding effect can be obtained.

However, in reality, there are many cases where the covers are glue-coated; for example, there are cases where the cover is made of a sheet of synthetic resin that is thick enough to be rolled up.

With such a structure of deformable flexible material, it is naturally difficult to provide a stable coating, and it is impossible to effectively prevent gas escape.

In particular, many large processing tanks have low bending rigidity, and a phenomenon in which the sheet sag occurs near the center of the tank.

Therefore, some have rod-shaped bones placed at appropriate intervals in the width direction for reinforcement.

However, such a configuration requires a sheet of considerable thickness, and the rod-shaped bones that support the heavy sheet need to be strong enough to prevent bending, which not only increases the diameter of the winding roll but also makes it economically difficult. Additionally, there are operational problems.

Rope or chain is usually used for towing operations when covering the tank with this type of cover, but chains have problems with corrosion due to treatment liquid and are expensive, and with rope, the winding diameter is the same on both the left and right sides. Without adjustment, one side of the cover would be pulled strongly, causing problems with the straightness of the cover.

There are also rubber-coated fabrics with reinforcing ribs, which are good in that they are flexible and easy to wind up and are inexpensive, but because they are woven fabrics, they lack elastic tension. In areas where there is no bone, the width becomes smaller and the center part sag, as if it were a drum shape, so it is necessary to reduce the spacing between the reinforcing bones, and the weight increases considerably. Not only was it difficult to describe, but also a good coating effect could not be expected.

Furthermore, since it is a rubberized fabric, the elongation due to the tension applied when opening and closing the cover is difficult to be constant, and if there is even a slight difference in the tension applied to both ends, the parallelism of both sides remains unchanged. It was not possible to maintain this, and naturally this caused problems with straightness.

The lightweight opening/closing lid of this invention takes into consideration the above-mentioned defects and has a structure that makes the opening/closing operation simpler, smoother, more accurate, and lighter.The structure will be described in detail based on illustrative drawings. do.

Depending on the application, this lightweight opening/closing lid is available in either a single-opening shutter format with a single flexible sheathing section or a double-opening shutter format with two flexible sheathing sections. Various operations are possible depending on the situation.

Next, aspects of this invention will be explained based on one example.

FIG. 1 is a plan view showing an overview of an embodiment of the lightweight opening/closing lid of this invention, and FIG. 2 is a part of the flexible cover (FC) forming the middle part of this lightweight opening/closing lid. 3 is a perspective view, and FIG. 3 is an enlarged view of an example of the fixed state of the reinforcing rib and the slide band.

FIG. 4 shows an enlarged cross section of the sliding guide part on the upper side wall of the tank, and FIG. 5 shows a cross section of examples of various shapes of the sliding surface of the sliding guide part.

This embodiment shows an example of a lightweight opening/closing lid using a drum with built-in power and a spring.

In the figure, 1 is a relatively thin flexible sheet made of organic fiber or inorganic fiber coated with rubber or plastic, or a rubber or plastic sheet, which shields gas, mist, etc. The material needs to be selected depending on the liquid situation.

The thickness is determined by considering the use and its durability, but in order to make it as lightweight as possible, a material that is as thin as possible and made of durable material is used.

2 is a relatively wide slide band that slides on the sliding surface on the upper side wall of the tank and is made of highly elastic material such as stainless steel and can be wound easily. It is a highly elastic body with extensibility, which makes the flexible covering part (F
It constitutes both end portions of C).

This structure of the slide band completely prevents deformation of the flexible sheath, maintains constant parallel running, and facilitates winding. It can be easily applied in a straight line over a wide area, achieving high adhesion, preventing gas from escaping, and improving the airtightness of the tank, so if it is necessary to install a deodorizing device, it can be done with a small size. I can do things.

In addition to the steel band, the slide band 2 may also be made of a highly elastic material that is practically non-stretchable, such as polyester resin, nylon resin, etc., and fiber reinforced plastic (FRP) such as glass fiber reinforced plastic, depending on the reaction tank. It is something that can be used.

In theory, when pulling out the slide band 2, by applying an appropriate reaction force to the drum side where it is wound, an appropriate tension is applied to the slide band so as not to loosen it, and the sliding surface (SS) is kept in contact with the slide band. This is taken into consideration so that good crimpness can be obtained.

The sliding guide part (SG) and its sliding surface (SS) on the upper side wall (TW) of the tank of this slide band 2 are as shown in FIGS. 4 and 5. Although a guide surface is also formed in the vertical direction, it is not necessary.

Moreover, various types of sliding surfaces (SS), such as a flat surface, a cylindrical shape, a protruding shape, etc., are used as appropriate.

Further, materials such as metal, rubber, or plastic are used as appropriate depending on the purpose of the processing tank.

Figure 5 shows an example of the sliding surface (SS), 17
18 is a flat sliding surface, 18 is a round sliding surface, 19 is a two-protrusion sliding surface, 20 is a protruding square sliding surface, and various other shapes can be used.

Note that when the slide band 2 is a steel band, the sliding surface (SS) is preferably made of rubber or plastic for its durability.

In addition, as will be described later, since the structure of the slide band 2 has parallel running properties and straight running properties, in particular, the sliding guide portion (
It is also possible to use the flange surface of the tank as the sliding surface of the sliding guide part without providing a sliding surface (SG) or sliding surface (SS).

Furthermore, as shown in the partial perspective view of the flexible cover (FC) in FIG. A plurality of reinforcing ribs 3, which are formed to have high rigidity and are as light as possible, are arranged at appropriate intervals with a flexible sheet 1 interposed therebetween, , is fixed with two wide slide bands 2.

Therefore, the flexible covering (FC) is formed by the slide band 2 and the reinforcing ribs 3 into a continuous rectangular lattice-shaped fixed frame whose periphery is fixed so as not to be deformed, and is easily rolled up. Although it will be removed, the distortion will never occur.

This reinforcing rib 3 needs to be rigid and as light as possible,
In the case of metal, hollow bodies are preferred.

If chemical resistance is required, it may be covered with rubber or plastic, and both hollow ends may be closed with caps 4.

Depending on the case, FRP or the like with high rigidity may also be used.

A composite of a metal core and FRP is also used.

The material for these reinforcing ribs 3 is selected to have the required rigidity depending on the size of the tank.

Further, an example of fixing the hollow body of the reinforcing rib 3 at the sectional position taken along the line Ill-III in FIG. 2 is shown in FIGS. 3-a and 3-b.

In FIG. 3-a, a fixing member 15 such as a screw is fixed to the upper part of the slide band 2, and a hollow reinforcing rib 3 is attached to the fixing member together with the flexible sheet 1 using a saddle-shaped fixing member 14. It is fixed with two 15 pieces.

In FIG. 3-b, the hollow reinforcing rib 3 is fixed to the slide band 2 together with the flexible sheet 1 using two fixing members 16 such as rivets.

If the fixing member 16 protrudes from the back surface of the slide band 2, if the two-protrusion type sliding surface 19 is used, the protrusion on the back surface will be located between the two protrusions, and suitable contact will be achieved, resulting in a complete A sealing effect can be obtained.

In addition, since the width of the processing tank is 2 m to 2 m or more in the case of a large-sized processing tank, when the flexible sheet is a woven fabric, it is preferable to use a cross-joint with less elongation and less distortion.

In other words, the horizontal joint prevents the central portion from sagging over a long period of time.

FIG. 3-b shows an example of horizontal splicing, in which flexible sheets 1 are spliced together using adhesive, and reinforcing ribs 3 are fixed thereon.

Of course, in the middle part of the reinforcing rib 3, it should be glued to the back side of the reinforcing rib, or alternatively, a handle made of the same rubber or plastic should be fixed to the reinforcing rib 3. You can do it like this.

The drawer side of the flexible cover (FC) configured as described above is fixed to a practically non-stretchable and highly rigid guide plate 5 made of metal such as stainless steel or FRP.

Rollers 6 are attached to both sides of this guide plate 5.

Further, a pull-out strip 9 like a belt for pulling out the flexible covering (FC) is connected to the guide plate 5, and the flexible covering (FC) is pulled out by winding it around a pulley or the like.

The drawer strip 9 is preferably made of a belt, which is more resistant to corrosion than a chain or rope, since it is less expensive and can be wound evenly around the grooved pulley.

In the figure, 10 is a grooved pulley, 11 is a shaft,
Reference numeral 12 indicates a mounting base for a grooved pulley, and 13 indicates a geared motor with a brake. In this example, the geared motor 13 drives the grooved pulley 10 and the drawer strip 9 is wound up to close the tank. .

When using power as in this example, it is configured to automatically stop using a limit switch or the like.

To open this closed lid, rotate the guard motor 13 in the reverse direction. Since the slide band 2 is fixed to the winding drum 7 on the opposite side, which has a built-in spring (SP), the restoring force of the spring will automatically release the lid. The film is then wound onto the winding drum 7 and the lid is opened.

8 is a stand on which the winding drum is mounted.

That is, simply by rotating the grooved pulley 10 in the forward or reverse direction, the lid of the tank can be opened and closed automatically at the correct position, which is extremely easy to operate and has an effective sealing effect. .

The above is for a single door, but the structure of the lid is exactly the same for a double door, but in the case of a double door, because two flexible coverings (FC) are used, the drive-related device is Winding drums are set on both sides, guide plates 5 are also provided on each drawer side, and the tips of the guide plates 5 of the flexible covering (FC) are in close contact with each other in the center of the tank.

As explained above, the flexible cover (FC) of the lightweight opening/closing lid of this invention consists of a thin but wide slide band that can be wound up with a highly elastic material that is practically non-stretchable, and a flexible The seat and reinforcing ribs, which are as light as possible and have high rigidity, are connected like a ladder in a continuous square grid-like fixed frame, so the tension when opening and closing is reduced by the non-extensible, high elasticity on both sides. It is held by the slide band of the body, and the problem of elongation is ignored, and although it is easily wound up, no distortion occurs, and the sheet or rubber is held near the center of the tank. The phenomenon of hanging cloth etc. has completely disappeared.

Furthermore, the tendency of the take-up roll to become large in diameter, which had been a problem when disposing strong bones on sheets of considerable thickness, as in the past, has been solved.

Therefore, the winding roll can be made with a relatively small diameter, which has excellent economical and operational advantages.

Furthermore, even if the tension applied to the two slide bands is not uniform, the wide slide band and reinforcing ribs can be
The slide band is fixed with two or more fixing members, that is, it is fixed in a way to prevent deformation.The slide band has a high elastic modulus, and although it is thin, it has a considerable width (the size of the tank It depends on the size, but for example, it is about 1 for large size.
00 mm), and the bending stiffness during winding is small, but the bending stiffness in the width direction is large.

Therefore, even if some force acts on the flexible sheath in the width direction during opening and closing and attempts to shift it, movement in that direction is partially prevented, and the slide band always maintains an unchanged parallel running position. In addition, even if there is an unevenness in the traction forces of the drawer strips on both sides, the tension is transmitted from the side with the strongest tension to the side with the weakest tension via the reinforcing ribs, so that the machine can always run in a straight line. Even if the lid is 2 m or longer, it can be opened and closed easily and smoothly without any prying phenomenon.

Therefore, when the flexible coating is pulled out and the lid is opened and closed by winding operations, the correct position is automatically maintained at all times, and the coating can be kept in a good sealing state due to the sliding band's contact properties. be.

In addition, the slide band can easily slide on the sliding surface, and since the entire structure is lightweight, smooth sliding can be easily achieved by the restoring force of the spring of the take-up roll. It has the feature that it can be wound in a precise position.

Of course, it can also be easily operated manually.

[Brief explanation of the drawing]

Figure 1 is a plan view of the lightweight opening/closing lid of this invention, and Figure 2 is:
Partial perspective view of the flexible covering part of the lightweight opening/closing lid, Figure 3-a, 1
) is an enlarged cross-sectional view showing an example of fixing the slide band of the flexible sheathing part and the reinforcing rib at the cross-sectional position taken along line III-III in FIG. 2, and FIG. 4 is a cross-sectional view showing an example of the sliding guide part. FIG. 5 is a sectional view of the sliding surface of the sliding guide portion. FC...Flexible covering part, SG...Sliding guide part, SS...Sliding surface, SP...Spring, 1... Flexible sheet, 2...
Slide band, 3...Reinforcement rib, 5...
...Guidance board, 7... Winding drum, 9...
...Drawer strip, 15.16...Fixing member.

Claims (3)

[Scope of utility model registration request] (1) In the lightweight flexible covering that opens and closes the upper opening of various tanks, it can be rolled up using two practically non-stretchable highly elastic bodies that slide on the sliding surface on the upper side wall of the tank. A flexible sheet is glued between the thin and wide slide bands, and reinforcing ribs with high rigidity and light weight are placed at appropriate intervals between the two above-mentioned ribs. The fixing points are fixed to the slide band via a flexible sheet with at least two fixing members, and a plurality of square lattice-shaped fixing frames are attached in a ladder shape by the slide band and reinforcing ribs on both sides. The flexible sheet is fixed to the reinforcing ribs, and the slide bands on both sides are attached to the guide plate at the end of the drawer side. A drawer strip is connected to the guide plate, and the winding side is fixed to a winding drum and is opened and closed by the traction force of the drawer strip and the winding drum. Lightweight opening/closing lid. (2) The lightweight opening/closing lid according to claim 1, wherein the sliding surface on the upper side wall of the tank is made of rubber or plastic. (3) The lightweight opening/closing lid according to claim 1, wherein the winding drum is a drum with a built-in spring.