JPH0454858Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a high viscosity material discharging device for supplying high viscosity materials such as fillers and adhesives to necessary locations.

"Prior Art" A discharge gun having a discharge nozzle at its tip is used to supply high viscosity substances such as fillers and adhesives to necessary locations.

The inside of a discharge gun commonly used in the past includes a flow path from the base end to the discharge nozzle at the tip;
A valve is provided in the middle of this flow path to open and close the flow path, and the high viscosity material is sent from the main pipe that feeds the high viscosity material to the base end of the discharge gun via a flexible tube such as a rubber tube. It's becoming like that. By rotating a handle pivotally attached to the discharge gun, the valve is opened, and the highly viscous material discharged from the discharge nozzle is supplied to the required location.

``Problems to be solved by the invention'' By the way, in order to smoothly supply a high-viscosity substance to a necessary location, it is necessary to apply a higher pressure than when supplying a low-viscosity substance. If a high viscosity discharge gun is used with the same structure as a low viscosity discharge gun, which simply has one valve in the middle of the flow path, the pressure on the proximal end of the valve will increase as shown in Figure 11. _P1
When the valve is opened, the pressure drops rapidly, and the pressure _P2 on the discharge nozzle side of the valve momentarily rises excessively, then drops slightly to a constant pressure. For this reason, the high viscosity material discharged from the discharge nozzle becomes abnormally discharged at the beginning, and an initial liquid pool a is formed as shown in FIG. 12.

In order to prevent such an initial liquid accumulation a from occurring, conventional methods have been to first slow down the rotation speed of the handle and then adjust the handle operation so that it gradually returns to normal speed, or to A reflux path was provided as shown in the publication, and Utility Model Application No. 61-91599
As shown in the publication, a discharge gun was used which was equipped with an elastic movable body to absorb abnormal discharge.

However, adjusting the handle operation requires skill and is difficult due to the viscosity of high-viscosity materials.
Further, a discharge gun provided with a reflux path or an elastic movable body cannot sufficiently cope with changes in the viscosity of a highly viscous material, and cannot prevent the formation of an initial liquid pool a.

This invention solves the above-mentioned conventional problems and provides a high viscosity material discharging device that can discharge a fixed amount of high viscosity material from the beginning.

"Means for solving the problem" This invention consists of a main pipe for feeding a high viscosity substance, a discharge gun having a discharge nozzle at the tip, and an interior of the discharge gun extending from the proximal end of the discharge gun to the discharge nozzle. a first valve that opens and closes the flow passage by rotation of a lever provided in the middle of the flow passage and pivotally connected to the discharge gun; and a valve having a chamber connected to the main pipe. a box, a second valve provided in the valve box to open and close between the main pipe and the chamber, and a flexible pipe having a smaller diameter than the main pipe that connects the chamber and the proximal end of the discharge gun. , when the tip faces the inside of the chamber and the first valve is opened, the second valve is pressed and the second valve is opened.
a rod for opening the valve; and an adjustment screw for adjusting the amount of protrusion of the tip of the rod into the interior of the chamber when the rod is separated from the second valve. This is a viscous material discharge device.

"Function" The initial pressure on the discharge nozzle side can be adjusted by operating the adjustment screw to adjust the amount of protrusion of the tip of the rod into the chamber when the rod is away from the second valve. can.

"Example" Next, an example of this invention will be described with reference to the drawings.

In Fig. 1, 1 is the main pipe, and along the way there are a stop valve 2, a filter 3, and a throttle valve 4 for pressure adjustment.
is installed. From the left of main pipe 1,
As shown in the figure, the high viscosity material is fed through a high viscosity material supply tank 5 and a high viscosity material supply pump 6. The right end of the main pipe 1 is connected to a valve case 8 via a connector 7, as shown in FIG. 2, and an air cylinder 9 is integrally connected to the valve case 8.

Further, one end of a flexible tube 10 such as a rubber hose having a smaller diameter than the main tube 1 is connected to the valve case 8, and the other end of the flexible tube 10 is connected to the proximal end of the discharge gun 11 as shown in FIG. It is connected to the. A lever 13 is pivotally attached to the discharge gun 11 by a shaft 12, and a discharge nozzle 14 is attached to the tip of the discharge gun 11.

As shown in FIG. 2, a chamber 15 is formed inside the valve case 8, and a spherical second valve 16 is provided between the chamber 15 and the right end of the main pipe 1. Second
The valve 16 is biased toward the valve seat 19 via a spring 17 and a valve body holder 18 to cut off communication between the main pipe 1 and the chamber 15. In contrast, the flexible tube 10 is in constant communication with the chamber 15.

Air supply and discharge pipes 22 and 23 are connected to the head flange 20 and bottom flange 21 of the air cylinder 9, which are integrally connected to the valve case 8, respectively, and a solenoid valve 24 shown in FIG. 1 is energized. Then, the pressurized air supplied to the air supply pipe 25 is supplied from the air supply/discharge pipe 22 into the air cylinder 9, the air supply/discharge pipe 23 is connected to the exhaust side, and when the solenoid valve 24 is demagnetized, the air is The pressure air supplied to the supply pipe 25 is supplied to the air supply/discharge pipe 23, and the air supply/discharge pipe 22 is connected to the exhaust side.

An adjustment screw 26 is screwed into the center of the head flange 20, and by rotating the adjustment screw 26 via a handle 27 passing through the adjustment screw 26, the tip of the adjustment screw 26 (the left end in FIG. ) can be made to appear or disappear into the air cylinder 9 by an arbitrary amount. 28 is a lock nut that stops the adjustment screw 26 from rotating.

A piston 29 is slidably provided in the air cylinder 9. When pressurized air is supplied from the air supply/discharge pipe 22 and the air supply/discharge pipe 23 is connected to the exhaust side, the piston 29 moves to the bottom flange 21. When the piston 29 moves toward the head flange 20 side and pressurized air is supplied from the air supply/discharge pipe 23 and the air supply/discharge pipe 22 is connected to the exhaust side, the piston 29 moves toward the head flange 20 side. A rod 31 is integrally connected to a piston rod 30 that is integral with the piston 29 by screwing, and the tip of the rod 31 (the left end in FIG. 2) is inserted into the valve case 8 and inside the chamber 15. It's coming.

As shown in FIG. 3, inside the discharge gun 11,
Discharge nozzle 14 from flexible hose connection port 32 at the base end
There is a flow path 33 leading to the flow path 33, and a first valve 34 and a valve seat 35 are provided in the middle of the flow path 33. The first valve 34 is connected to the valve seat 3 by a spring 36.
When the lever 13 is grasped and rotated upward, the valve stem 37 moves upward and closes the first valve 33.
4 is designed to open. A limit switch 39 is attached to the upper surface of the cap 38 that supports the upper end of the spring 36. When the first valve 34 is closed, the contact point of the limit switch 39 is open, but the valve stem 37 moves upward. First
When the valve 34 is opened, the upper end of the valve stem 37 pushes the limit switch 39 to close the contact.

The limit switch 39 is connected to the solenoid valve 24 by a cord 40 as shown in FIG.
When the contact of the limit switch 39 closes, the solenoid valve 2
When the limit switch 4 is energized and the contact of the limit switch 39 is opened, the solenoid valve 24 is demagnetized.

In the above-described device, when the lever 13 of the discharge gun 11 is not gripped, the first valve 34 is seated on the valve seat 35 as shown in FIG.
The contact point of the limit switch 39 is open and the solenoid valve 24 (see FIG. 1) is demagnetized. Therefore, pressurized air is supplied to the air supply/discharge pipe 23 shown in FIG. 2, the air supply/discharge pipe 22 is connected to the exhaust side, and the piston 29 is moved toward the head flange 20 as shown in FIG. It is maintained. Therefore, the piston rod 30 and the rod 31 integrated with the piston rod 30 are also moved to the right in FIG.
It will be separated from the valve 16 of. Therefore, the second valve 16 is pushed by the spring 17 and the valve body receiver 18 and is seated on the valve seat 19, blocking the connection between the main pipe 1 and the chamber 15, and preventing the high viscosity material fed by the main pipe 1 from entering the valve seat 19. is no longer supplied into the chamber 15, and the first valve 34 (third
(see figure) is also closed, so no high viscosity material is discharged from the discharge nozzle 14.

When the lever 13 of the discharge gun 11 is grasped and the lever 13 is rotated upward about the shaft 12, the valve rod 37 and the first valve 3 are moved against the force of the spring 36.
4 moves upward, the first valve 34 opens and the contact point of the limit switch 39 closes.
When the contact of the limit switch 39 closes, the solenoid valve 2
4 (see FIG. 1) is excited and pressurized air is supplied to the air supply/discharge pipe 22, and at the same time, the air supply/discharge pipe 23 is connected to the exhaust side. As a result, as shown in FIG. 4, the piston 29 moves toward the bottom flange 21, and the piston rod 30 and the rod 31 integrated therewith also move to the left.
The tip of the valve 1 penetrates the chamber 15 and protrudes toward the main pipe 1 side beyond the valve seat 19, and presses the second valve 16 toward the main pipe 1 side to open the second valve 16 against the force of the spring 17. Become. Therefore, the high viscosity material being fed to the main pipe 1 passes between the open second valve 16 and the valve seat 19, enters the chamber 15, and then enters the flexible pipe 10,
The liquid is discharged from the discharge nozzle 14 through a flow path 33 in the discharge gun 11 (see FIG. 3) and between the open first valve 34 and the valve seat 35.

Since the flexible pipe 10 has a smaller diameter than the main pipe 1, the highly viscous material flows in the flexible pipe 10 without being filled with the high viscosity material and creating a void, and from the discharge nozzle 14, the high viscosity material flows at a rate per hour. Stable ejection is performed with no change in ejection amount.

When you release the lever 13 of the discharge gun 11 that you were holding, the first valve 34 seats on the valve seat 35 due to the force of the spring 36, closing the middle of the flow passage 33, and the contact of the limit switch 39 opens and the electromagnetic valve 24
(see Fig. 1) is demagnetized, pressure air is supplied to the air supply/discharge pipe 23, and at the same time the air supply/discharge pipe 22 is connected to the exhaust side, and the piston 29, piston rod 30, and rod 31 are It will move to the right from this state.

When Rod 31 begins to move to the right, the second
The valve 16 is seated on the valve seat 19 to cut off the connection between the main pipe 1 and the chamber 15, and the piston 29, piston rod 30, and rod 31 continue to move to the right, resulting in the state shown in FIG.

As mentioned above, the second valve 16 connects the main pipe 1 and the chamber 15.
As the rod 31 moves to the right and the amount of protrusion into the chamber 15 decreases even after blocking the space between the flexible tube 10 and the flexible tube 10, a portion of the highly viscous material inside the flexible tube 10 is sucked into the chamber 15. The pressure within the flexible tube 10 will drop slightly.

When discharging a high viscosity substance from the discharge nozzle 14 again, the tip of the rod 31 in the state shown in FIG. However, since the first valve 34 of the discharge gun 11 is already open at this time, the flexible tube 10 and the discharge gun 1 are
The pressure of the highly viscous material in the flow path 33 of No. 1 does not increase rapidly. and then the second valve 16
is separated from the valve seat 19 and the high viscosity substance in the main pipe 1 is supplied to the flexible pipe 10, as shown in FIG.
The pressure P _{1 on the base end side of the discharge gun 11 of the first valve 34 does not drop suddenly, and the pressure P 2 on} the discharge nozzle side of the first valve 34 does not rise excessively momentarily. As shown in the figure, a constant amount of high viscosity material can be stably supplied from the discharge start point b.

When the adjusting screw 26 screwed into the head flange 20 of the air cylinder 9 is rotated by the handle 27 and the tip of the adjusting screw 26 protrudes into the air cylinder 9 as shown in FIG. valve 16
and the piston 29, piston rod 30, and rod 3 when the first valve 34 (see FIG. 3) is closed.
1 is regulated and reduced to the right, the amount of high viscosity material sucked into the chamber 15 from the flexible tube 10 is reduced, and the degree of pressure drop within the flexible tube 10 is reduced. .

The air cylinder 9 at the tip of the adjustment screw 26 can be
By adjusting the amount of inward protrusion, the second valve 1
6 and the degree of pressure drop in the flexible tube 10 when the first valve 34 is closed, it is possible to optimize the high viscosity material discharge condition at the high viscosity material starting point b.

As shown in Fig. 9, a plurality of discharge systems consisting of a throttle valve 4, a valve box 8, a flexible tube 10, and a discharge gun 11 are connected in parallel to one main pipe 1, so that work can be performed simultaneously at many locations. You can also make it possible. In this case, the high viscosity material supply tank 5, the high viscosity material supply pump 6, and the main pipe 1 must have large capacities.

Further, as shown in FIG. 10, one end of the main pipe 1 is used as a high viscosity material suction port to suck high viscosity material from the high viscosity material supply tank 5, and the other end of the main pipe 1 is used as a high viscosity material discharge port to constantly supply high viscosity material. It is also possible to circulate it within the main pipe 1.

"Effect of the invention" This invention allows a portion of the high viscosity material in the flexible tube 10 to be transferred to the chamber when the first valve 34 of the discharge gun 11 is closed.
5 to lower the pressure inside the flexible tube 10, there is no abnormal discharge when starting to discharge a highly viscous material, and the occurrence of an initial liquid pool can be prevented.

Further, the amount of high viscosity material sucked into the chamber 15 can be adjusted using the adjustment screw 26, so that the high viscosity material discharge state at the time of starting discharge can be optimized.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the whole of one embodiment of this invention, Fig. 2 is a sectional view of the valve case and air cylinder,
Fig. 3 is a sectional view of the discharge gun, Figs. 4 and 5 are sectional views of the valve case and air cylinder showing a state different from Fig. 2, and Fig. 6 is a sectional view of the discharge gun when this invention is used. Graph showing the proximal side pressure and discharge nozzle side pressure, Fig. 7 is a plan view showing the initial discharge state of high viscosity material when using this invention, Fig. 8
Figures 9 and 10 are system diagrams showing embodiments of the main pipe, Figure 11 is a graph showing the pressure on the proximal end of the discharge gun and the pressure on the discharge nozzle when using a conventional device, and Figure 12. FIG. 2 is a plan view showing an initial discharge state of a high viscosity substance when a conventional device is used. 1... Main pipe, 8... Valve box, 10... Flexible pipe, 1
DESCRIPTION OF SYMBOLS 1...Discharge gun, 13...Lever, 14...Discharge nozzle, 15...Chamber, 16...Second valve, 26...
...adjustment screw, 31...rod, 33...flow path,
34...First valve.

Claims (1)

[Claims for Utility Model Registration] 1. A main pipe for feeding a high viscosity substance, a discharge gun having a discharge nozzle at its tip, and a flow path within the discharge gun extending from the proximal end of the discharge gun to the discharge nozzle; a first valve that opens and closes the flow path by rotation of a lever provided in the middle of the flow path and pivotally connected to the discharge gun; a valve box having a chamber connected to the main pipe; and the valve. a second valve provided in the box for opening and closing between the main pipe and the chamber; a flexible pipe having a smaller diameter than the main pipe connecting the chamber and the proximal end of the discharge gun; a rod that faces the inside of the valve and presses the second valve to open the second valve when the first valve is opened; and a tip of the rod when the rod is separated from the second valve. An adjustment screw for adjusting the amount of protrusion into the chamber. 2. Utility model registration claim No. 1, characterized in that it is equipped with a plurality of valve boxes whose respective chambers are connected in parallel to a main pipe, and a plurality of discharge guns whose base ends are respectively connected to the chambers. The high viscosity material discharging device according to item 1. 3. Utility model registration claim 1, characterized in that one end of the main pipe is a high viscosity substance suction port, the other end of the main pipe is a high viscosity substance discharge port, and the high viscosity substance is circulated through the main pipe. High viscosity material discharging device as described in .