JP2500216Y2 - Sealing material application gun - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a sealing material coating gun, and is intended to discharge the sealing material satisfactorily.

<Prior Art> In a car painting line, the gap between the panels is sealed before painting. That is, as shown in FIG.
A sealing material (highly viscous vinyl chloride) 3 is filled between the panels 1 and 2 welded to each other. Then, the paint is applied to the surfaces of the panel 1, the sealing material 3 and the panel 2 which are flush with each other (the upper surface in FIG. 6). In order to perform such a seal, conventionally, a sealing material injector 10 as shown in FIG. 7 has been used. This sealant injector 10
Has a structure similar to that of a small oil bottle, and has a structure in which a cap nozzle 12 is screwed into an elastic main body 11, and a sealing material 3 is filled inside. To seal, the operator manually presses the main body 11 in the direction of arrow A to apply pressure, and the sealing material 3 is discharged from the tip of the cap nozzle 12.

<Problems to be solved by the invention> By the way, the conventional sealing material injector 10 has the following drawbacks.

(I) Since the worker presses the main body 11 by hand to discharge the sealing material 3, the worker is easily tired and is not suitable for continuous work. This is because the sealing material 3 has a high viscosity and a large pressing force is required.

(Ii) It is preferable that the sealing material 3 has a high viscosity, but if a sealing material having an excessively high viscosity is used, the gripping force of a human is limited, so that the sealing material 3 is difficult to be ejected, and in some cases, a necessary amount is required. In some cases, the sealing material 3 cannot be discharged.

(Iii) When the amount of the sealing material 3 in the sealing material injector 10 is reduced, even if the main body 11 is pushed, air only comes out from the tip of the cap nozzle 12, and it becomes difficult to discharge the sealing material 3. In particular, if the sealing material 3 remains on the bottom portion (right end in FIG. 7) of the main body 11, such a phenomenon is likely to occur. That is, the sealing material 3 in the main body 11 cannot be entirely discharged, and a part of the sealing material 3 remains in the main body 11, resulting in poor utilization effect.

The present invention has been made in view of the above-mentioned conventional art, and an object thereof is to provide a sealing material application gun capable of discharging the sealing material satisfactorily even if the operating force is small.

<Means for Solving the Problem> The structure of the present invention for solving the above-mentioned problems has a tubular shape in which both end surfaces are closed, an air supply pipe is provided at one end surface, and a nozzle is provided at the other end surface. A main body having a free piston slidably provided therein, a lever slidably provided on the main body, and moving toward and away from the air supply pipe in accordance with the swing of the lever. , Compressed air is supplied from one end side, cut off the flow of compressed air when it is far from the air supply pipe, and when it gets a little closer to the air supply pipe, it sends compressed air to the air supply pipe and the atmosphere, and completes the air supply pipe. Is installed on the free piston and a valve mechanism that sends compressed air to the air supply pipe when the free piston approaches the other end surface. And a relief valve attached to an attachment position that fits into the nozzle.

<Operation> With the sealing material application gun of the present invention, the sealing material can be discharged / stopped only by operating the lever, and the sealing material can be gradually discharged in the initial stage of discharging.

<Embodiment> An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a sealing material applying gun according to an embodiment of the present invention, FIGS. 2 and 3 show the main parts thereof, and FIG. 4 is a view taken along the line IV-IV in FIG. As shown in these figures, the sealing material application gun has a main body 20, a lever 30, and a valve mechanism 40.

The main body 20 has a cylindrical shape, and an end plate 21 is formed on the right end face (one end face) and a tapered end plate 22 is formed on the left end face (other end face). The end plate 21 is provided with an air supply pipe 23, and the end plate 22 is provided with a nozzle 24. Further, a free piston 26 having a relief valve 25 is provided in the main body 20, and the free piston 26
At the boundary, an air chamber 27 and a chamber filled with the sealing material 28 are formed.

The lever 30 is pivotally supported on the main body 20 by a pin 31 and can swing. A pair of locking pins 32 (Fig. 4) are formed on the lever 30.

The valve seat 41 of the valve mechanism 40 includes a connecting pipe 42 and O-rings 43, 4
4 is attached, and a valve body 46 biased to the left (in FIG. 1) by a spring 45 is movably provided. As shown in the perspective view of FIG. 5, the valve body 46 has a shape like a combination of a rectangular parallelepiped and a disc body.
An air hose (not shown) is connected to the connection pipe 42 to supply compressed air.

A ring-shaped groove 47 is formed on the outer peripheral surface of the valve seat portion 41, and the locking pin 32 of the lever 30 is fitted in the groove 47. Therefore, when the lever 30 is pushed toward the main body 20, the valve mechanism 40 moves to the left (in FIG. 1), and when the lever 30 is stopped from being pushed to the free state, the spring force of the spring 45 causes the valve mechanism 40 to move to the right. To the right (in FIG. 1).
That is, the swing of the lever 30 causes the valve mechanism 40 to move toward and away from the air supply pipe 23. In this case, there is a gap 50 between the outer peripheral surface of the air supply pipe 23 and the inner peripheral surface of the valve seat portion 41.

In the sealing material application gun having such a structure, if the lever 30 is set to be free without being pressed, the valve mechanism 40
2 is in the state shown in FIG. 2, that is, the disc body of the valve body 46 is in close contact with the O-ring 44. Therefore, the supply of compressed air is shut off by the close contact between the valve element 46 and the O-ring 44. Therefore, the sealing material 28 is not discharged from the nozzle 26.

When the operator pushes the lever 30 toward the main body 20, the valve mechanism 40 moves to the left, and when the left end of the valve body 46 abuts the air supply pipe 23, the valve body 46 and the O-ring 44 are separated from each other. There is a gap between them. Therefore, the compressed air flows through the connecting pipe 42, part of the compressed air enters the air chamber 27 through the air supply pipe 23, and part of the compressed air is discharged into the atmosphere through the gap 50. It Since a part of the compressed air is discharged to the atmosphere in this way, the pressure in the air chamber 27 gradually rises,
The free piston 26 gradually moves to the left. Therefore, the sealing material 28 is gradually discharged from the nozzle 24. Therefore, a good quality seal can be obtained in the initial stage of the sealing work.
If a large amount of the sealing material 28 is suddenly discharged in the initial stage of the sealing work, the sealing material 28 may be in a “heap” state, and this portion must be corrected later. Since the material 28 is discharged, a good quality seal can be made.

When the lever 30 is further pressed, the right end of the air supply pipe 23 comes into close contact with the O-ring 43 as shown in FIG. In this case, the pressurized air is all sent to the air chamber 27 without leaking to the atmosphere, the free piston 26 moves to the left, and the sealing material 28 is smoothly discharged in large quantities from the nozzle 24. In this case, the force required to press the lever 30 is weak enough to overcome the spring force of the spring 45, and the operator's fatigue level is small. Further, since the force of compressed air is used, the sealing material 28 having a higher viscosity than conventional can be used.

When the released lever 30 is released, the valve mechanism 40 returns to the right and the air chamber 27 passes through the gap 50 to the atmosphere,
The free piston 26 immediately stops, and the discharge of the sealing material 28 from the nozzle 24 also immediately stops. Therefore, the excess sealing material 28 is not discharged, and the sealing operation can be completed accurately.

It should be noted that when the sealing material 28 in the main body 20 is completely discharged while the lever 30 is being pressed and the air pressure in the air chamber 27 rises, it is possible to prevent the relief valve 25 from opening and overpressure.

Moreover, since the relief valve 25 is installed at the center position of the free piston 26, when the sealing material 28 is completely discharged and the free piston 26 approaches the end plate 22, the relief valve 25 fits into the nozzle 24. Therefore sealing material
When all 28 is discharged, the compressed air discharged from the relief valve 25 enters the nozzle 24 and is ejected from the nozzle 24. In this way, when the sealing material 28 is completely discharged, the compressed air is ejected from the nozzle 24, so that the operator can immediately know that all the sealing material 28 has been discharged.

<Effects of the Invention> As described in detail with the embodiments above, the present invention has the following effects.

(I) The sealing material can be discharged simply by pressing the lever,
Less fatigue.

(Ii) Since compressed air is used for discharging the sealing material, a sealing material having a high viscosity can be adopted.

(Iii) It is possible to discharge all of the sealing material, resulting in high utilization efficiency.

(Iv) The sealing material is gradually discharged at the beginning of the sealing operation, and the discharging of the sealing material can be immediately stopped at the end of the sealing operation, so that a high quality seal can be obtained.

(V) Since compressed air is ejected from the nozzle when all the sealing material is discharged, it can be immediately known that all the sealing material has been discharged.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 and FIG.
FIG. 4 is a block diagram showing the main part of the embodiment, and FIG.
FIG. 5 is a perspective view showing a valve body and a spring, FIG. 6 is a sectional view showing a sealed panel, and FIG. 7 is a constitutional view showing a prior art. In the drawing, 20 is a main body, 21 and 22 are end plates, 23 is an air supply pipe, 24 is a nozzle, 26 is a free piston, 28 is a sealing material, 30 is a lever, 40 is a valve mechanism, 41 is a valve seat portion, 46 Is a valve body and 50 is a gap.

Claims (1)

(57) [Scope of utility model registration request] 1. A cylindrical shape having both end surfaces closed,
An air supply pipe is provided at one end surface, a nozzle is provided at the other end surface, a main body having a free piston slidably provided therein, a lever slidably provided in the main body, and the lever The compressed air is supplied from one end side while being moved toward and away from the air supply pipe in accordance with the swing of the compressed air, and when the air is separated from the air supply pipe, the flow of the compressed air is cut off, and the compressed air is slightly approached. And a valve mechanism that sends compressed air to the air supply pipe and the atmosphere, and sends compressed air to the air supply pipe when completely approaching the air supply pipe; and the free piston is attached to the other end surface. And a relief valve mounted at a mounting position that fits into the nozzle when approaching the sealing material. gun.