JPH0248372Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Field of Industrial Application) The present invention relates to a cover that is attached to the opening of a container containing adhesive coloring material, adhesive, etc., and allows the contents to be discharged little by little by an automated device.
More specifically, the present invention relates to a metering cover that allows accurate metering by ensuring that the sliding portions of the valve seat and valve element are always in close contact with each other without becoming sticky and solidified. (Prior art) Color matching of paints is performed using several types (usually 3 to 5 colors) from dozens of different primary colors (paints made of varnishes containing colorants, additives, solvents, etc.).
The process involves selecting and mixing primary colors (primary colors) and matching them to the specified hue so that there is no visual difference. In this process, the extraction of the primary color is always carried out precisely from the smallest droplet that the primary color can form (preferably as small a droplet as possible, but usually around 20-50 mg due to the viscosity of the primary color) to the desired required weight. It must be possible to take out the desired amount. Therefore, the valve seat and valve element at the opening for discharging the primary colors will not stick to the primary colors or will not stick even if they dry after adhesion, making it possible to easily remove sticky substances or deposits, and ensuring that the valve element always operates smoothly. Even after the desired amount of primary color is taken out, the viscosity of the primary color prevents it from dripping like a string from the valve seat opening (good dripping), and the valve seat and valve element are tightly attached. The valve must be able to open and close at all times even with a relatively weak force to prevent leakage. The valve seat and valve mechanism having these functions can also be applied to a part from which other adhesives (adhesive substances such as resinous oil varnish and ink) are taken out. As for the conventional technology related to metering valves,
- An improved needle valve selectively moved axially within a cylindrical orifice as shown in No. 22665 ``Metering Valve''; There are known devices that digitally adjust the flow rate using a plurality of valve holes having different cross-sectional areas that communicate with the outlet chamber and a plurality of valve bodies that selectively open and close the valve holes. A conventional technique that prevents the valve seat and valve element from sticking or solidifying is the use of thermoplastic aromatic polysulfone and fluororesin on the surface of the sliding part, as shown in JP-A-56-83663 "Improved Plug Valve". Coated with a composition of
There are known materials that form a composite film of metal and polymer as shown in FIG. (Problem to be solved by the invention) However, in these conventional technologies, since an outflow pipe is provided between the valve body and the outflow port, there is a problem with the above-mentioned dripping problem, and it is difficult to accurately apply the adhesive coloring material and adhesive. The disadvantage was that it could not be weighed. Conventionally, as a device for measuring adhesive colorants and adhesives, a lid as shown in FIG. An adapter device is used that pulls 54 rearward to cause liquid to exit from spout 56. The inventors of the present invention previously proposed an improved product for such a cover (Utility Model Application Publication No. 153851/1982), but this improved product was not necessarily satisfactory when the container became large. In other words, in the case of a small adhesive colorant container of 1 liter or less, for example, the paint pressure is small and the valve opening area is small, so it is easy to prevent paint from leaking by using a small pressing force to bring the valve into close contact with the valve seat. However, in the case of large containers exceeding 1 liter, the paint pressure increases and the valve opening must be made larger, which results in insufficient adhesion between the valve element and the valve seat, resulting in paint leakage. . When paint leaks, problems such as solidification after the leak impairs the smooth movement of the valve, and the leaked liquid gets mixed into the sampling container, hindering accurate metering. The purpose of this invention is to solve the problems of the conventional cover lid, to ensure that the valve and valve seat are always in close contact with each other even for large-capacity containers, to prevent leakage, and to ensure accurate measurement. To provide an automatic opening/closing cover that can be incorporated into an automatic weighing device. (Means for Solving the Problems and Their Effects) The above-mentioned objects of the present invention are to provide an opening for discharging the adhesive coloring material, a valve seat formed on the upper surface of the opening, and a valve seat that slides on the valve seat. A flat valve,
a non-adhesive resin interposed between the valve seat and/or the sliding portion of the valve element; a return spring that presses the valve element to its closed position; at least one pair of side rollers that limit lateral movement of the valve; at least one upper surface roller that contacts the top surface of the valve to restrict upward movement of the valve; This is achieved by a lid for automatically opening and closing an adhesive coloring material container, which is provided with a traveling roller rolling on a cover plate and a cam receiving roller disposed near the end of the valve. Based on this structure, according to the cover of the present invention, while the valve element is opening and closing, its free movement in the lateral and vertical directions is restricted and it is reliably guided, and the force of the return spring allows the valve element to be guided securely. Close contact will always be maintained. Therefore, especially for large capacity containers exceeding 1 liter,
This prevents the liquid from pushing the valve away and overflowing, making it possible to measure accurately. Since the sliding portion between the valve element and the valve seat is almost exclusively rolling friction, the valve element can be operated even with relatively weak force. Accurate metering is enhanced not only by the good adhesion between the valve element and the valve seat mentioned above, but also by the dripping effect of the non-adhesive resin present on the sliding parts of the valve seat and/or valve element, which eliminates unnecessary drips. Since the paint does not stick, there is no gap between the valve element and the valve seat, allowing accurate metering to continue. In the case of large containers with a capacity of more than 1 liter, an automatic measuring device is required because the weight becomes large and manual operation is difficult. Since the roller is arranged, it can come into contact with a cam attached to the automatic weighing device and receive rotational force from a pulse motor or the like, and the lid can be used for automatic opening and closing. In particular, when incorporated into an automatic opening/closing device, the valve element and valve seat are always kept in close contact with each other, so smooth operation and accurate metering can be guaranteed. It is desirable that the non-adhesive resin is a fluororesin. Types of fluororesin include tetrafluoroethylene/hexafluoropropylene copolymer resin (FEP), tetrafluoroethylene resin (PTFE), trifluoroethylene resin, vinylidene fluoride resin, vinyl fluoride resin, Fluorinated ethylene/perfluoroalkyl vinyl ether copolymer resin (PFA), tetrafluorinated ethylene/ethylene copolymer resin (ETFE),
Various other fluororesins can also be used. The valve element and the valve seat can be made of a metal material to which these fluororesins are welded or coated, or they can be made by inserting a metal material into a molded fluororesin core. Other features and advantages of the invention will become apparent from the following description with reference to the embodiments shown in the accompanying drawings, FIGS. 1-3. (Example) FIG. 1 shows a cover for automatically opening and closing an adhesive coloring material container according to the present invention. It is attached over the opening of the adhesive colorant container by tightening the adhesive colorant container. On the cover plate, there are an opening 14 for discharging the adhesive coloring material, a valve seat 16 (FIG. 2) formed on the top surface of the opening 14,
A flat valve element 18 that slides on the valve seat 16, a fluororesin plate 2 attached to the lower surface of the valve element 18
0, a return spring 22 that presses the valve element 18 to its closed position, a side roller 24 that contacts the side surface of the valve element 18, an upper surface roller 26 that contacts the upper surface of the valve element 18, and a cover plate that is attached to the valve element 18. A running roller 28 is arranged that rolls on the top. The rear end portion of the valve element 18 branches in parallel and extends vertically upward, and a cam receiving roller 30 is attached to the center thereof. The cam receiving roller 30 comes into contact with the cam surface as the cam 60 of the automatic metering device disposed above the lid rotates in the direction of arrow R due to the torque transmitted from the camshaft 62, and is pressed in the direction of arrow A. I am moved to. As a result, the valve 18 moves in the direction A, and the adhesive coloring material is discharged in the direction of arrow B, as shown in FIG. The side rollers 24 are mounted on side rails 32 screwed to the cover plate 10, and the gap between the valve element 18 and the side rollers 24 can be adjusted by moving the mounting screws 33 within the elongated holes. It's summery. A total of four upper rollers 26, two on each side, are attached to a cross-shaped bracket 34, and the gap between them and the valve element 18 can be adjusted by tightening an adjusting screw 36. Two traveling rollers 28 are attached, one on each side of a block 38 screwed to the valve element 18. By adjusting the screw 39 connecting the valve element 18 and the block 38, the rollers 28 can be connected to the cover plate 10. The gap between them can be adjusted. The upper surface roller 26 and the running roller 28 are the valve element 18
It is also possible to arrange only one each on the center line. In this case, it is preferable that the upper surface of the valve element 18 is made into a flat plate without cutting parallel grooves. Each roller 24, 26, 28, 30 is preferably constructed with a roller bearing or ball bearing to minimize rolling friction. FIG. 3 shows another embodiment in which the bracket holding the upper roller 26 is changed, and in this example, T-shaped brackets 40 are arranged front and rear to close the gap between the valve element 18 and the upper roller 26. It can be adjusted in each position. (Experimental example) A 20 liter adhesive colorant container was covered with the lid according to the present invention and actual measurement was carried out. The cover plate was positioned vertically, and the adhesive coloring material was dropped from the opening while the valve was moving up and down in the vertical direction. The collection container is placed on an electronic balance, and while the amount of paint being weighed is constantly monitored by a computer, a cam is driven by a computer-controlled pulse motor to move the valve, and the amount of outflow and the opening of the valve seat opening are measured. We investigated the relationship between If the opening is 0 when the valve is closed and in contact with the shortest part of the cam, and 100 when the valve is fully open and in contact with the longest part of the cam, the relationship between the flow rate and the opening is as follows. It became like that. However, acrylic baking enamel was used as the liquid colorant, and the room temperature was 30°C.

[Table] This metering device was operated 30 times a day for 8 months, and during that time there was almost no leakage between the valve element and the valve seat, and the flow rate was controlled according to the opening degree as shown in the table above. was completed. The actual weighing results obtained by controlling the degree of opening of this cover by a computer are as follows. (1) Experimental example with a weighing capacity of 2 kg or less (Weighing capacity of the scale: 10 mg to 2000 g) Indication value (g) Weighing result White enamel 1000.00 1000.02 Black enamel 450.00 449.97 (2) Experimental example with a weighing capacity of 2 kg or more (Weighting capacity of the scale: 100 mg to 16000 g ) Indicated value (g) Weighing result White enamel 10000.0 9999.9 Black enamel 4000.0 4000.0 Furthermore, as a result of repeating the experiment on 5 liter, 20 liter, and 30 liter paint containers, the accuracy of the scale (minimum scale) of 10 mg is plus or minus. 30
If the accuracy of the scale is 100 mg, it was found that accurate measurements can always be made within the error range of plus or minus 100 mg. In addition, it was found that the paint did not drip as if it were pulling strings, and that a so-called lid with good dripping properties could be obtained. (Effects of the invention) As explained in detail above, according to the cover of the present invention, even for containers with a large capacity of more than 1 liter, the valve element and the valve seat can always be brought into close contact to prevent leakage. Precise measurement can be performed. In addition, its practical value is significant, as smooth operation is guaranteed when it is incorporated into an automatic weighing device and operated.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the cover according to the present invention, FIG. 2 is a perspective view showing the opening in an open state, and FIG. 3 is a perspective view of the upper part of the cover according to another embodiment of the present invention.
FIG. 4 is a perspective view of a conventional cover. 10... Cover plate, 14... Opening, 1
6... Valve seat, 18... Valve, 20... Resin plate, 2
2...Spring, 24...Side roller, 26
...Top roller, 28...Travel roller, 30...
Cam receiving roller.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An automatic opening/closing cover that is attached to the opening of a container containing an adhesive colorant and allows the adhesive colorant to be discharged little by little, the opening from which the adhesive colorant is discharged. a valve seat formed on the upper surface of the opening; a flat valve element that slides on the valve seat; and a non-adhesive material interposed on the sliding portion of the valve seat and/or the valve element. a resin; a return spring that presses the valve element toward its closed position; at least one pair of side rollers that contact each side of the valve element to limit lateral movement of the valve element; and an upper surface of the valve element. at least one upper surface roller that contacts the valve element and limits upward movement of the valve element; a running roller that is attached to the valve element and rolls on a cover plate of the cover lid; and a running roller that is arranged near an end of the valve element. A lid for automatically opening and closing an adhesive coloring material container, characterized in that it is equipped with a roller for receiving a cam. 2. The cover according to claim 1, wherein the non-adhesive resin is a fluororesin. 3. The cover lid according to claim 1, wherein the valve seat and/or the valve element are made of a metal material welded or coated with fluororesin. 4. The cover lid according to claim 1, wherein the valve is made by inserting a metal material into a molded fluororesin core.