JPH0615049B2 - Shoulder-type foam dispenser - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to foam dispensers, in particular foam dispensers configured as a shoulder rest type.

[Conventional technology]

Prior art in the field of the present invention includes Brooks foam dispensers and others disclosed in US Pat. No. 3,556,890.

The Brooks foam dispenser is a set of two stock solution containers and an opening / closing control device for the stock solution delivery valve.The gripping hand and bubble opening / closing operation lever provided in the set are held in one hand, and the valve opening / closing operation lever is opened. The liquid concentrate can be delivered and stopped by operation, and the aerosol valve outlet pipes of the liquid concentrate containers are connected to the mixture injection guns by long flexible pipes to mix the liquid concentrate injected from the aerosol valve. It is configured to inject the mixture at a desired construction site.

Devices other than this Brooks foam dispenser are similar to the Brooks device described above, but those that use a complicated discharge flow rate controller in the injection gun part or type that uses the stock solution container upright There are things.

Also known is a structure in which a raw material container, an undiluted solution delivery amount adjuster, and an injection gun are integrated.

These foam dispensers have been widely used for many years since they were first proposed when a foaming resin such as urethane foam was invented, and have a long history, but there are many problems as described below.

The stock solution containers used in these known foam dispensers are of a type in which the aerosol valve tilts the stock solution delivery pipe, so the valve opening is narrow due to its structure, the injection flow rate is small, and the injection flow rate is small. It is not possible to control accurately, therefore the quality of the foam is not uniform because the blending ratio fluctuates, and since the two liquids used are not exhausted at the same time, a considerable amount of either one of the stock solutions is excessive, There is a problem of being discarded in vain.

Furthermore, tilting the stock solution delivery pipe of the valve requires a considerable amount of force, but since this force must be maintained during work,
It is difficult to work continuously for a long time.

Furthermore, in these devices, it is necessary to support the stock solution container set with one hand and operate the gun with the other hand while gripping the handle, so that movement of the work piece,
It is difficult to fix them and there is also the problem that two people must work together in some cases.

In addition, the conventional device does not have a sufficient safety device, so if you accidentally touch the handle, the stock solution may be accidentally sprayed, but if the stock solution is sprayed even momentarily, the subsequent cleaning is not possible. Not only is it very labor intensive, but the mixture remaining in the static mixer solidifies in a short time, which necessitates immediate cleaning or disposal of the static mixer.

As described above, the foam dispenser of the conventional device has many problems, and the construction requiring foamed resin coating such as urethane foam is required even at the construction site.
For example, sealing of each part, installation of window frames, heat insulation and cold insulation of pipes, outer walls, ceilings, etc., and soundproofing work are extremely numerous, and they are also used in various mechanical devices in various colors, and the quality of the work can be improved. Although strongly demanded, there has been no proposal for an improved device which is more convenient, easy to work with, wastes no material, and is capable of applying good quality urethane foam.

[Problems to be solved by the invention]

The present invention has been made in order to solve the above problems, the object of the present invention is more convenient, easier to work, and less waste of material than the above-mentioned various known foam dispensers. It is to provide a large quantity of foam dispensers that can be used to manufacture high-quality urethane foam at low cost.

[Means for solving problems]

According to the research conducted by the present inventors, many of the problems of these known devices are derived from the fact that a stock solution container equipped with an aerosol valve of a type in which the stock solution delivery pipe is tilted is used as the stock solution container. It turned out to be a thing.

It has become clear that many of the above problems can be solved by adopting a container having a push button type aerosol valve as the stock solution container.

More specifically, the above problem is that in the foam dispenser described above, a container having a push button type aerosol valve is adopted as the stock solution container, and a shoulder strap is provided on the container support tool. A safety plate that can prevent the pressing operation of the push button of the valve is provided, and further, the flow rate of the stock solution can be controlled at the ends on the static mixer side of the pair of flexible thin tubes connected to the stock solution inlet of the static mixer. This is achieved by providing an on-off valve.

Therefore, it is recommended to use a container having the same shape and the same capacity as the stock solution container.

Further, although not particularly limited, the present invention is most suitable for an apparatus for producing and applying a polyurethane foam by using an aerosol container containing a stock solution containing a polyisocyanate component and a polyol component, respectively.

[Action effect]

Since the present invention is configured as described above, it has the advantages listed below.

(1) Since the valve for controlling the amount of the undiluted solution delivery is obtained separately from the main body of the apparatus, it can be configured as a shoulder type.

(2) Since almost all the weight of the device including the stock solution container can be supported by the shoulder, operator fatigue is reduced.

(3) The work can be done with one hand, and one hand can be opened, so the work that was conventionally done by two people can be done by one person.

(4) Since the injection amount of the undiluted solution can be accurately controlled, good quality foam can be obtained, and the amount of only one undiluted solution remaining and discarded is reduced.

(5) When the work is interrupted, the amount of the stock solution remaining in the equipment is minimized, and the stock solution to be discarded is reduced.

〔Example〕

 Hereinafter, the configuration of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of a shoulder type foam dispenser according to the present invention, FIG. 2, FIG. 3, and FIG. 4 are AA cutting line and BB cutting line in FIG. 1, respectively. Line and C
-C is a cross-sectional view taken along the line C, Fig. 5 is a partially cutaway front view of a gun consisting of an on-off valve capable of controlling the flow rate of the stock solution, a static mixer and a mixture discharge cylinder, and Fig. 6 is a partially cutaway view of the above gun FIG. 7 is a side view, FIG. 7 is a sectional view taken along the line D-D in FIG. 5, and FIG. 8 is a perspective view showing the shape of a spiral type mixer which is inserted into a gun as a static mixer and incorporated therein.
FIG. 9 is a front view thereof, FIG. 10 is a longitudinal sectional view showing the structure of a baffle plate type mixer which can also be used as a static mixer, FIG. 11 is its front view, and FIG.
FIG. 13 is a partially enlarged sectional view showing a state in which the stock solution outlet pipe is pushed in and an outlet hole is opened, and FIG. 13 is a perspective view showing the entire assembled state.

In FIG. 1 to FIG. 13, 1 and 1'are stock solutions containing, for example, a polyol component of a polyisocyanate component, and 2 and 2'are containers for containing these stock solutions (hereinafter, the structures of stock solution containers 2 and 2 '). The description will be made only for the stock solution container 2 except for the case where they are the same, 3 is a stock solution outlet pipe, 4 is a stock solution outlet hole, 5 is a stock solution outlet, 6 is an inner packing, 7 is an outer packing, and 8 is Umbrella-like projection of the stock solution outlet pipe 3, 9 is a male screw part of the stock solution outlet pipe 3, 10 is a T-shaped operating tool for opening the stock solution outlet hole 4, 11 is a T-shaped operating tool 10 at its tip. Operating rod with male thread to connect with female thread, 12
Is a handle provided at one end of the operating rod 11, 13 is a push button that is pressed to open the stock solution outlet hole 4, 14 and 14 'are stock solution discharge pipes, 15 is a safety plate that can prevent the push button 13 from being pressed, 16
Reference numerals 17 and 17 are lower and upper container support plates that form a support for the stock solution container, and 18 are fixing claws that fix the stock solution container 2 to the support plate.
19 is a shoulder strap, and 20 and 20 'are shoulder strap mounting holes provided in the upper container support plate 17.

When attaching the stock solution containers 2 and 2'to the injection device,
First, the heads of the stock solution containers 2 and 2 ′ are attached to the lower container support plate 16
It is inserted into the mounting hole provided in the and is locked by the fixing claw 18.
Then, the container support plate 17 on the upper side is attached to the bottom portion thereof, and is locked by the fixing claw like the head portion.

Next, an aerosol valve opening / closing device including the T-shaped operation tool 10 and the operation rod 11 is attached.

The T-shaped operation tool 10 is composed of a pair of arms that hold the push buttons 13 and 13 'and a leg portion that has a female screw portion at one end.
11 has a male screw portion adapted to the female screw portion provided on the leg portion of the T-shaped operation tool 10 at one end thereof, and a handle at the other end thereof.
Twelve are provided.

As shown in FIG. 1, a T-shaped operating tool 10 is attached to the lower side of the stock solution containers 1 and 1'so as to embrace the push buttons 13 and 13 'of the stock solution containers 1 and 1'. The male screw portion 11 is screwed into the female screw portion provided on the leg portion of the T-shaped manipulating tool 10 through a mounting hole provided at the center of the upper container support plate 17.

On the other hand, between the push button 13 of the aerosol valve and the head of each undiluted solution container, a safety plate 15 capable of preventing the push operation of the push button 13 is inserted so as to be able to move forward and backward, and as shown in FIG. When the plate 15 is entering the above gap, push button
It is configured so that the pressing of 13 is blocked.

Further, as shown in FIG. 13, flexible flexible thin tubes 32 and 32 '.
Is used to connect the stock solution discharge pipes 14 and 14 'of the pair of stock solution containers 1 and 1'to the stock solution inlets 28 and 28' of the gun shown in FIGS. 5 and 6, respectively.

The structure of the gun will be described below with reference to FIGS. 5 and 6.

In FIG. 5 and FIG. 6, reference numeral 21 designates a knurled cylindrical portion on the outer peripheral surface thereof, and a rotary shaft portion 23 having coaxially projecting from both side surfaces of the cylindrical portion and having a gear portion 22 on the outer peripheral surface. And a columnar valve body with a shaft 24, which guides the rotary shaft portion 23 of the valve body 21 to the inner surfaces of the opposing side walls,
A boat box having a guide groove 25 having a rack gear meshing with a gear portion 22 provided on the outer peripheral surface of the rotary shaft portion 23 and having a valve seat surface 26 gently inclined with respect to the guide groove 25 on the bottom surface thereof. Body, 27 is a hollow cylinder provided at the end of the boat-shaped box 24 and has a pair of undiluted solution inlets 28 and 28 'at one end, 29 is a boat-shaped box
Discharge cylinder that is connected to the hollow cylinder 27 through the mounting hole provided in the front end face plate of 24 and injects the supplied mixture, 30 is a static mixer, 31 is the inside of the hollow cylinder 27 and the front stage of the static mixer 30 It is a premixing chamber formed in.

As described above, the pair of stock solution inlets 28 and 28 'and the stock solution discharge pipe 14 are provided.
And 14 'are connected by flexible thin tubes 32 and 32', respectively. However, as shown in FIGS. 5 and 6, inside the boat box 24, the flexible thin tubes 32 and 32 'are connected. Is connected to a pair of stock solution inlets 28 and 28 'provided at one end of the hollow cylinder 27 through a gap between the outer peripheral cylindrical surface of the cylindrical valve body 21 and the inclined valve seat surface 26 at the bottom, and , The thin tubes 32 and 32 'are valve bodies
The space between the outer peripheral cylindrical surface of 21 and the valve seat surface 26 is configured to be narrowed to some extent.

When pushing the outer peripheral surface of the valve body 21 with a finger and rotating it, the valve body 21
The rotary shaft 23 rotates. In response to this rotation, the gear portion 22 is moved along the guide groove 25 while meshing with the rack gear provided in the guide groove 25, so that the valve body 21 is moved along the guide groove 25. .

On the other hand, since the valve seat surface 26 at the bottom is inclined with respect to the guide groove 25 of the rotary shaft portion 23 of the valve body 21, the gap between the outer peripheral cylindrical surface of the columnar valve body 21 and the valve seat surface 26 is It changes according to the position of movement of the valve body 21 due to rotation.

Therefore, when the valve body 21 moves, the degree of narrowing of the flexible thin tubes 32 and 32 'existing in the gap changes depending on the position of the valve body 21 and, therefore, passes through both thin tubes 32 and 32'. The liquid flow rate to be controlled is controlled.

The boat-shaped box 24 is usually 100-200 mm long and 20 wide.
~ 35mm, depth 20 ~ 25mm is recommended. In this case, the weight is about 100 to 200 g.

The connecting pipes 32 and 32 'are usually flexible pipes made of soft vinyl chloride, polypropylene, polyethylene, etc., and usually have an outer diameter of 3 to 5 mm, an inner diameter of 2 to 4 mm, a pressure resistance of 10 kg / cm ² , and a length of usually 1 to 1. The thing of about 3 m is used.

Incidentally, in this embodiment, FIG. 1, FIG. 2, FIG.
The container support plate, the T-shaped operating tool and the operating rod were attached to the positions shown in FIGS. 12 and 13, respectively. However, these attachment positions are not limited to those in the above-mentioned embodiment. It is also possible to attach it to the arm side of the T-shaped operation tool and screw the tip screw part into the lower container support plate. In that case, the aerosol container can be used upright. It is possible.

Next, when using this device, first, the safety plate 15 is removed, and the handle 12 is turned clockwise. At that time, the T-shaped manipulating implement 10 is lifted upward in FIG.
As shown in FIG. 12, the stock solution outlet pipe 3 is lifted to open the stock solution outlet holes 4 and 4 ′, and the stock solution 1 and 1 ′ are ready to be delivered by the pressure of the gas for sealing. The aerosol valve is normally fully open.

Then, as shown in FIG. 5, FIG. 6 or FIG. 13, the cylindrical valve body 21 is rotated to the front side (the side opposite to the discharge cylinder 29).
When it is moved toward, the gap between the valve body 21 and the valve seat surface 26 expands, the flexible thin tubes 32 and 32 'are loosened, and the dew flow is opened, so that the stock solutions 1 and 1' Flowing into
Further, both liquids are sufficiently mixed by the static mixer 30, and the mixture is jetted to the outside through the discharge cylinder 29.

As the static mixer 30, for example, the spiral type mixer shown in FIG. 8 or the baffle plate type mixer shown in FIG. 10 can be used.

When the valve body 21 is rotated and returned to the original position, the outflow of the liquid is stopped.

[Test example]

Urethane foam construction was performed using the following stock solution containers.

(1) Stock solution container containing isocyanate component: Into a stock solution container having an internal volume of 500 cc, 350 cc of crude MDI and Freon gas (Freon 12) was sealed in a dry state at 7 kg / cm ² .

(2) Stock solution container containing polyol component: In the same stock solution container as described above, 350 cc of the following polyol component was enclosed in a dry state at 7 kg / cm ² together with nitrogen gas.

However, NCO / OH of the isocyanate component and the polyol component per equivalent volume was 1: 1 (equivalent ratio).

Polyol component: Polyoxypropyletriol 50 parts Ethylenediamine diol 50 parts Tris (2-chloroethyl) phosphate 20 parts Silicone oil (foaming agent) 1.5 parts Tin catalyst 2.0 parts Freon gas (Freon 12 + Freon 11) 130 parts (3) Equipment overview: The gun used was 210 mm long, 28 mm wide and 20 high.
It was mm. A static mixer was used as the static mixer.

The total length of the flexible thin tube was 1200 mm.

The total weight was about 1,200 g (350 g of equipment + about 850 g of stock solution).

(4) Construction effect: The equipment was hung on the shoulder with a hand, and urethane foam coating construction was performed on the wall surface.

The discharged product had a foamy creamy form and was cured in about 1 minute. The total amount of cured product was about 20, but a very homogeneous foam was obtained.

The two stock solution containers were emptied at approximately the same time, and the remaining amount of stock solution was extremely small.

〔The invention's effect〕

In the shoulder foam dispenser according to the present invention, since the push button type aerosol valve capable of controlling the flow rate with high precision is adopted, the mixing ratio of the two liquids is accurately controlled, and therefore a good quality foam is obtained and discarded. The volume of stock solution is reduced.

In this device, the valve for controlling the injection flow rate of the resin can be provided separately from the stock solution container via the long flexible thin tube, so that the device can be a shoulder type, and therefore the work can be performed for a long time. However, the operator's fatigue is reduced.

Furthermore, since the injection gun is extremely lightweight and can be freely operated with one hand, it is possible to move and fix the work piece with one free hand, and one person can perform advanced work that could not be done by two people before. Will be able to.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a shoulder type foam dispenser according to the present invention, FIG. 2, FIG. 3, and FIG. 4 are AA cutting line and BB cutting line in FIG. 1, respectively. Line and C
-C is a cross-sectional view taken along the line C, Fig. 5 is a partially cutaway front view of a gun including an on-off valve capable of controlling the flow rate of the stock solution, a static mixer and a mixture discharge cylinder, and Fig. 6 is a partially cut side view of the gun. Fig. 7 is a sectional view taken along the line D-D in Fig. 5, Fig. 8 is a perspective view showing the shape of a spiral type mixer which is inserted and built in a gun as a static mixer, and Fig. 9 is a front view thereof. FIG. 10 is a longitudinal sectional view showing the structure of a baffle plate type mixer which can also be used as a static mixer, FIG. 11 is a front view thereof, and FIG. 12 is a state in which the stock solution outlet pipe in FIG. And FIG. 13 is a perspective view showing the entire assembled state. 1, 1 '... stock solution 2, 2' ... stock solution container 3 ... stock solution outlet pipe 4 ... stock solution outlet hole 5 ... stock solution outlet 6 ... inner packing 7 ... outer packing 8 ... umbrella-like projection 9 ... … Male screw part 10 …… T-shaped operation tool 11 …… Operating rod 12 …… Handle 13 …… Push button 14,14 ′ …… Undiluted solution discharge pipe 15 …… Safety plate 16 …… Lower container support plate 17 …… Upper container support plate 19 …… Shoulder strap band 20 …… Shoulder strap mounting hole 21 …… Cylindrical valve element with shaft 22 …… Gear part 23 …… Rotating shaft part 24 …… Boat box 25 ...... Guide groove 26 …… Valve seat surface 27 …… Hollow cylinder 28, 28 '…… Stock solution inlet 29 …… Discharge cylinder 30 …… Static mixer 31 …… Pre-mixing chamber 32, 32' …… Flexible thin tube

Claims (5)

[Claims] 1. A set of two undiluted solution containers each having an aerosol valve and an aerosol injection nozzle and separately containing undiluted solution of a two-liquid mixing type foaming resin, and one undiluted solution container in parallel and detachable. And a device capable of simultaneously opening and closing the aerosol valve of a set of stock solution containers mounted on the container support, a pair of stock solution inlets and a single discharge cylinder A static mixer that can inject a mixture of the undiluted solution supplied from the undiluted solution inlet from a single discharge cylinder, and the undiluted solution injected from the injection nozzles of one set of undiluted solution containers to the pair of undiluted solution inlets of the static mixer. In a shoulder type foam dispenser consisting of a pair of flexible thin tubes, the aerosol valve of the stock solution container is a push button type aerosol valve, and the container support is provided with a shoulder strap. A safety plate is provided to prevent the push operation of the push button of the aerosol valve, and the stock solution flow rate is controlled at the static mixer side end of a pair of flexible thin tubes connected to the stock solution inlet of the static mixer. The above-mentioned shoulder type foam dispenser, which is provided with an open / close valve that can be opened. 2. The shoulder type foam dispenser according to claim 1, wherein the two stock solution containers are containers of the same shape and the same capacity. 3. The two kinds of stock solutions contained in the stock solution container respectively comprise a polyisocyanate component and a polyol component for producing a polyurethane foam.
Item 2. The shoulder type foam dispenser according to item 2 or item 3. 4. A safety plate is inserted into a gap between a push button of an aerosol valve and a head of a stock solution container so as to be able to advance and retreat, and prevents a push operation of the push button when entering the gap. 6. The shoulder type foam dispenser according to any one of the first to third aspects. 5. An on-off valve capable of controlling the flow rate of the undiluted solution includes a cylindrical portion having an outer peripheral surface knurled, and a rotary shaft portion coaxially protruding from both side surfaces of the cylindrical portion and having a gear portion on the outer peripheral surface. A cylindrical valve body with a shaft, and a rack gear that guides the rotary shaft portion of the valve body inside the opposite side walls and meshes with a gear portion provided on the outer peripheral surface of the rotary shaft portion. A boat-shaped box with a guide groove and a valve seat surface that is gently inclined to the guide groove on the bottom, and a pair of undiluted solution inlets provided at one end of the boat-shaped box A flexible thin tube is configured to pass between the cylindrical portion of the valve body and the valve seat surface of the boat-shaped box body, and is constricted by the movement of the cylindrical portion of the valve body. The shoulder-type four according to any one of claims 1 to 4 Dispenser.