JPH0218139B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement in a sealant coating device.

Prior Art A sealant applicator is used to apply a sealant to the joints of a panel or the like as an object to be sealed. A sealing gun that discharges sealant towards the sealing gun, a main delivery passage that pumps the sealant towards the sealing gun, and a main delivery passage that is provided in the middle of this main delivery passage to discharge the sealant from the sealing gun. Some devices are known that include a pressure control device that adjusts the discharge pressure.

Problems to be solved by the invention By the way, in the conventional sealant application device,
Once the discharge pressure of the sealant discharged from the sealing gun is set by adjusting the pressure control device, the sealing application operation is performed at the set discharge pressure from the start of the application operation until the end of the application operation. However, before coating starts, sealant remains in the main delivery passage, including the sealing gun, and when the trigger is pulled at the start of coating, the discharge pressure applied by the pressure control device increases. is added, so that at the beginning of the coating process, the remaining sealant is discharged at once toward the area to be sealed, and at the beginning of the application process, the operator must move along the seam as the area to be sealed. Since the sealing gun is operated at a relatively slow speed, there is a problem in that the initial coating portion of the sealing target portion becomes thicker than the subsequent sealing target portion.

In addition, when the part to be sealed has a shape change in the front-rear direction along the seam during application of the sealing object, the operator should use the sealing gun along the seam at the part where the shape changes. In order to slow down the operation speed, the shape-changing portion becomes thicker than other sealing target portions, and conventional sealant applicators have a problem in that it is difficult to improve the appearance performance.

FIG. 5 is an explanatory perspective view for explaining this. In FIG. 5, 1 is a floor panel, 2 is an inner panel, and the inner panel 2 and the floor panel 1 are In this case, the object to be sealed is a seam 3 as a part to be sealed, and 4 is a shape changing part. It is thicker than the part to be sealed, and 6 indicates the sealing material.

OBJECTS OF THE INVENTION The present invention has been made in view of the problems of the prior art described above, and the first object of the present invention is to improve the appearance performance by preventing build-up of the initial part of the sealant application process. A second object of the present invention is to provide a sealant applicator that can be expected to improve the sealant application process, and a second object of the present invention is to prevent build-up of the initial part of the sealant application process, and to prevent build-up in the initial part of the sealant application process, as well as to prevent the sealant application device from forming a part that has changed in shape in the part to be sealed. To provide a sealant applicator that can prevent the shape-changed portion from becoming built-up and improve the appearance performance of the entire sealing target part even in the case of a sealing material application device.

Structure of the Invention The first feature of the sealant application device according to the present invention is that the pressure control device is provided in the middle of the main delivery passage and adjusts the discharge pressure of the sealant discharged from the sealing gun. A main delivery passage intervening pressure regulating valve, a residual pressure valve that discharges sealant from a sealing gun based on the residual pressure, and a main delivery passage intervening pressure regulating valve provided in the middle of the main delivery passage downstream of the main delivery passage intervening pressure regulating valve based on a trigger. At the initial stage of trigger operation, the sealant is discharged from the sealing gun based on the residual pressure of the residual pressure valve, and when the trigger is fully stroked, the sealant is discharged based on the pressure of the pressure regulating valve in the main delivery passage. The communication state is switched between a state in which the residual pressure valve and the sealing gun communicate with each other so that the sealing material is fed under pressure toward the sealing gun, and a state in which the main delivery passage-interposed pressure regulating valve communicates with the sealing gun. It is equipped with a solenoid for switching the communication state.

The second feature of the sealant applicator according to the present invention is that the pressure control device is provided in the middle of the main delivery passage to adjust the discharge pressure of the sealant discharged from the sealing gun. An intervening pressure regulating valve, a residual pressure valve that discharges sealing material from a sealing gun based on the residual pressure, and a main delivery passageway intervening pressure regulating valve that is provided in the middle of the main delivery passage downstream of the intervening pressure regulating valve and is driven based on a trigger. At the initial stage of trigger operation, the sealing material is discharged from the sealing gun based on the residual pressure of the residual pressure valve, and when the trigger is fully stroked, the sealing material is discharged from the sealing gun based on the pressure of the pressure regulating valve interposed in the main delivery passage. A communication state in which the communication state is switched between a state in which the residual pressure valve and the sealing gun communicate with each other and a state in which the main delivery passage-interposed pressure regulating valve communicates with the sealing gun so that the sealing material is fed under pressure toward the The switching solenoid and the branch passage branched from the middle of the main delivery passage on the downstream side of the communication state switching solenoid valve, and the discharge pressure of the sealant discharged from the sealing gun provided in the middle of the branch passage. A pressure regulating valve with a branch passageway that adjusts the discharge pressure of the sealant so that the discharge pressure of the sealant is lower than the discharge pressure of the sealant adjusted by the pressure regulation valve with the main distribution passageway, and a solenoid valve downstream of the communication state switching solenoid valve. A solenoid valve is provided in the middle of the side main delivery passage and is driven based on a switch means, and the solenoid valve communicates the branch passage intervening pressure regulating valve with the sealing gun and the branch passage intervening pressure regulating valve. It is possible to switch between a state in which the communication state switching solenoid and the sealing gun are communicated without intervening.

Embodiments Below, embodiments of the sealant coating apparatus according to the present invention will be described based on the drawings.

FIG. 1 is a schematic configuration diagram showing a piping system of a sealant application device according to the present invention, and in this FIG. 1, 1 is a sealant pressure feeding means,
This sealing material pressure feeding means 1 has a sealing material storage tank 2 and a sealing material pressure feeding pump 3. A pump 3 for pumping sealant is fixed to a mounting plate 5 attached to pillars 4, 4,
It is provided directly above the sealant storage tank 2. The pump 3 for pumping the sealing material is provided with a pumping pipe 6, and the pumping pipe 6 extends toward the sealing material 7 stored in the sealing material storage tank 2 and is immersed in the sealing material 7. The height of the sealing material pump 3 is adjustable. This sealing material pump 3 is for pumping the sealing material 7 toward a sealing gun 9 via a main delivery pipe 8 serving as a main delivery passage. A pressure control device 10 is provided in the middle of the main delivery pipe 8 to adjust the discharge pressure of the sealant discharged from the sealing gun 9.
Here, a valve 11 is provided on the direct current of this pressure control device 10.

As shown in FIGS. 2 to 4, the pressure control device 10 is a main distribution passage intervening pressure regulating valve that is provided in the middle of the main distribution passage 8 and adjusts the discharge pressure of the sealant discharged from the sealing gun 9. 12, and a residual pressure valve 13 that discharges the sealing material from the sealing gun 9 based on the residual pressure. Here, this residual pressure valve 13 is connected to the drain passage 1
4, and this drain passage 14
The details will be described later. Downstream main distribution passage 15 downstream of the main distribution passage intervening pressure regulating valve 12
is provided with a communication state switching solenoid valve 17 that is driven based on the trigger 16 of the sealing gun 9. The communication state switching solenoid valve 17 switches its communication state between a state in which the residual pressure valve 13 and the sealing gun 9 are communicated and a state in which the main delivery passage interposed pressure regulating valve 12 and the sealing gun 9 are communicated. It is something that can be done. The communication state switching solenoid valve 17 is urged in the direction of arrow A by a spring 18, 19 is a plunger of the communication state switching solenoid valve, 20 is a power cord, and 21 is a communication state switching solenoid valve drive switch. be. This communication state switching solenoid valve drive switch 21 is installed near the sealing gun 9. The solenoid valve drive switch 21 for switching the communication state is configured such that when the trigger 16 is pulled, the trigger 16 engages with a switch piece 22 of the solenoid valve drive switch 21 for switching the communication state when the trigger 16 is fully stroked. This communication state switching solenoid valve drive switch 21 is turned on based on the operation of the trigger 16.

The communication state switching solenoid valve 17 is driven in the direction opposite to the arrow A direction when the communication state switching solenoid valve drive switch 21 is turned on. FIG. 3 shows a state in which the main delivery passage intervening pressure regulating valve 12 and the sealing gun 9 communicate via the solenoid valve 17 for switching the communication state, and FIG. 2 shows the solenoid valve for switching the communication state. 17
A state in which the residual pressure valve 13 and the sealing gun 9 are in communication through the is shown. The downstream main delivery passage 23 on the downstream side of the communication state switching solenoid valve 17 has a branch passage 24 .
A branch passage intervening pressure regulating valve 25 is provided in the middle. This branch passage intervening pressure regulating valve 25 is configured so that the discharge pressure of the sealing material discharged from the sealing gun 9 is lower than the discharge pressure of the sealing material regulated by the main delivery passage intervening pressure regulating valve 12. It has the function of adjusting the discharge pressure of the sealant. Here, the set pressure of the main delivery passage intervening pressure regulating valve 12 is 50Kg/cm ² to 100
Kg/cm ² , branch passage intervening pressure regulating valve 2
The set pressure of the residual pressure valve 3 is set to approximately 30 kg/cm ² , and the set pressure of the residual pressure valve 3 is set to be lower than the set pressure of the branch passage interposed pressure regulating valve 25 .
Here, the set pressure of the residual pressure valve 13 is 30 to 50.
Kg/cm ² is set. Downstream main delivery passage 2
A solenoid valve 26 is provided in the middle of 3, and this solenoid valve 26 is biased in the direction of arrow B by a spring 27, 28 is a plunger of the solenoid valve 26, 29 is a power cord, and 30 is a solenoid valve drive switch as a switch means. The solenoid valve drive switch 30 is located within the reach of the sealant applicator and is attached to a delivery hose 31 that forms part of the main delivery path.

The solenoid valve 26 is driven in the direction opposite to the direction of arrow B when the solenoid valve drive switch 30 is turned on. This solenoid valve 26 directly communicates between the state in which the branch passage interposed pressure regulating valve 25 and the sealing gun 9 are communicated, and the communication state switching solenoid valve 17 and the sealing gun 9 without intervening the branch passage interposed pressure regulation valve. It can be switched between the states. In FIGS. 2 and 3, the solenoid valve drive switch 30 is turned off, and the solenoid valve 17 for switching the communication state is operated via the solenoid valve 26.
FIG. 4 shows a state in which the solenoid valve drive switch 30 is turned on and the branch passage intervening pressure regulating valve 25 and the sealing gun 9 are connected via the solenoid valve 26. The state in which the two are connected is shown.

The sealing gun 9 has a discharge nozzle 32, and when the trigger 16 is pulled, a nozzle opening (not shown) of the discharge nozzle 32 is opened.
At the initial stage of operation of the trigger 16 and before the trigger 16 engages with the switch piece 22, the residual pressure valve 13 and the sealing gun 9 are in communication as shown in FIG. When the mouth is opened, the sealing material remaining in the sealing gun 9 is removed based on the residual pressure of the residual pressure valve 13.
It is discharged from. When the trigger 16 is pulled to its full stroke, the trigger 1 is transferred to the switch piece 22.
6 is engaged, the communication state switching solenoid valve drive switch 21 is turned on, and the main delivery passage intervening valve 12 and the sealing gun 9 are connected via the communication state switching solenoid valve 17 as shown in FIG. A state of communication is established, and the sealing material is forced toward the sealing gun 9 and discharged. The residual pressure valve 13 is connected to the downstream drain passage 33 via the drain passage 14 as shown in FIG.
is communicated with. This drain passage 33 extends toward a drain tank 34. The drain tank 34 is provided with a sealing material pressure pump 35 directly above it and a liquid level detector 36, and when the sealing material 37 stored in the drain tank 34 reaches a predetermined liquid level, The sealing material pressure feeding pump 35 is driven, and the sealing material 37 is forced into the return pipe 38 by the sealing material pressure feeding pump 35, and is returned to the main delivery passage 8 via the return pipe 38. It is becoming. Note that 39 is a check valve.

Next, the effect will be explained.

Solenoid valve drive switch 21 for switching communication state
When is off, the communication state switching solenoid valve 17 is in a state of communicating the residual pressure valve 13 and the sealing gun 9 as shown in FIG. Therefore,
When the trigger 16 of the sealing gun 9 is pulled, the nozzle port of the discharge nozzle 32 is opened, and the opening of the nozzle port releases the sealing material remaining in the sealing gun 9 based on the residual pressure of the residual pressure valve 13. It is discharged all at once from the discharge nozzle. Thereafter, when the trigger 16 is further pulled, the solenoid valve drive switch 21 for switching the communication state is turned on, and the solenoid valve 17 for switching the communication state is activated by the main delivery passage interposed pressure regulating valve 1.
2 and the sealing gun 9 are in communication with each other, and the sealing material is forced to be fed to the sealing gun 9 via the main delivery pipe 8. The application process starts from here, and since the sealant remaining in the sealing gun 9 is discharged and thrown away before the application process starts, the sealing material is built up on the area to be sealed in the initial part of the application process. can be prevented from occurring.

When there is a shape changing part in the part to be sealed, the solenoid valve drive switch 30 is turned on. Then, the solenoid valve 26 is turned on, and the sealing material is forced to be fed toward the sealing gun 9 via the branch passage intervening pressure regulating valve 25. The set pressure of this branch passage interposed pressure regulating valve 25 is:
Since the pressure is set lower than the set pressure of the main delivery passage intervening pressure regulating valve 12, the discharge pressure of the sealant discharged from the sealing gun 9 is directly directed from the main delivery passage intervening pressure regulating valve 12 to the sealing gun 9. The discharge pressure was lower than the discharge pressure of the sealant discharged from the sealing gun 9 when the sealant was fed under pressure, and the operator slowed down the operation speed of the sealing gun 9 along the sealing target part at the shape changing part. Even if this occurs, it is possible to prevent build-up of the shape-changing portion.

When the trigger 16 is released, the communication state switching solenoid valve drive switch 21 is turned off. Then, the communication state switching solenoid valve 17 switches between the main delivery passage intervening pressure regulating valve 12 and the sealing gun 9.
The residual pressure valve 13 and the sealing gun 9 are switched from communicating with each other to communicating with each other. Moreover, the nozzle opening is closed at the same time as the trigger operation is released. Immediately after the residual pressure valve 13 and the sealing gun 9 are communicated and the nozzle port is closed, the pressure of the sealing material in the main delivery passage downstream of the communication state switching solenoid valve 17 is as follows. The pressure of this sealant corresponds to the set pressure of the main delivery passage intervening pressure regulating valve 12, and the pressure of this sealant is higher than the set pressure of the residual pressure valve 13, so the set pressure of the residual pressure valve 13 and the sealing material The sealing material will be pumped toward the drain tank 34 based on the pressure difference between the pressure and the pressure of .

Effects of the Invention As explained above, the present invention discharges the sealant remaining in the downstream main delivery passage including the sealing gun at the initial stage of coating, and discharges the sealant from the sealing gun during the coating. Since the discharge pressure of the sealant can be changed depending on the part to be sealed during application, the appearance performance of the part to be sealed can be expected to be improved and the quality of the application can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing a piping system of a sealant application device according to the present invention, and FIGS. 2 to 4 are main part configuration diagrams of a sealant application device according to the present invention. A diagram showing a state in which the solenoid valve for switching the communication state according to the present invention communicates between the residual pressure valve and the sealing gun, and FIG. FIG. 4 is a diagram showing a state in which the solenoid valve according to the present invention communicates with the sealing gun, and FIG. 5 is a diagram showing a state in which the solenoid valve according to the present invention communicates with the sealing gun. FIG. 2 is a partial perspective view for explaining an example of a malfunction in the sealant application device of FIG. 8... Main delivery pipe (main delivery passage),
9... Sealing gun, 12... Main delivery passage intervening pressure regulating valve, 13... Residual pressure valve, 17... Communication state switching solenoid valve, 25... Branch passage intervening pressure regulating valve, 26... Solenoid valve, 30... ...Solenoid valve drive switch.

Claims (1)

[Scope of Claims] 1. A sealing gun that has a trigger and discharges a sealant toward a portion to be sealed; a main delivery passage that pumps the sealant toward the sealing gun; and the main delivery. A sealing material applicator having a pressure control device installed in the middle of the passage to adjust the discharge pressure of the sealant discharged from the sealing gun, wherein the pressure control device is installed in the middle of the main delivery passage. a main delivery passage intervening pressure regulating valve that is provided and adjusts the discharge pressure of the sealant discharged from the sealing gun; a residual pressure valve that discharges the sealant from the sealing gun based on residual pressure; and the main delivery passageway. It is provided in the middle of the main delivery passage on the downstream side of the passage intervening pressure regulating valve and is driven based on the trigger, and at the initial stage of operation of the trigger, sealing is performed from the sealing gun based on the residual pressure of the residual pressure valve. The residual pressure valve and the sealing gun are configured such that when the trigger is fully stroked, the sealing material is pumped toward the sealing gun based on the pressure of the main delivery passage intervening pressure regulating valve. A sealing ring characterized by comprising a communication state switching solenoid valve whose communication state is switched between a state in which it communicates with a gun and a state in which it communicates with the main delivery passage intervening pressure regulating valve and the sealing gun. Material coating equipment. 2. A sealing gun that has a trigger and discharges a sealant toward the sealing target area; a main delivery passage that pumps the sealant towards the sealing gun; and a main delivery passage provided in the middle of the main delivery passage. and a pressure control device that adjusts the discharge pressure of the sealant discharged from the sealing gun, the pressure control device being provided in the middle of the main delivery passage and controlling the discharge pressure of the sealant discharged from the sealing gun. A main delivery passage intervening pressure regulating valve that adjusts the discharge pressure of the sealing material discharged from the gun, a residual pressure valve that discharges the sealing material from the sealing gun based on residual pressure, and a main delivery passage intervening pressure regulating valve. It is provided in the middle of the main delivery passage on the downstream side and is driven based on the trigger, and at the initial stage of operation of the trigger, the sealing material is discharged from the sealing gun based on the residual pressure of the residual pressure valve, and , a state in which the residual pressure valve and the sealing gun are communicated with each other such that when the trigger is fully stroked, the sealing material is force-fed toward the sealing gun based on the pressure of the main delivery passage intervening pressure regulating valve; and a communication state switching solenoid valve whose communication state is switched between communicating with the main delivery passage intervening pressure regulating valve and the sealing gun, and a main delivery passage downstream of the communication state switching solenoid valve. a branch passage branched from the middle of the branch passage, and a sealant passage provided in the middle of the branch passage, the discharge pressure of the sealant discharged from the sealing gun being regulated by the main delivery passage intervening pressure regulating valve. a branch passage-interposed pressure regulating valve that adjusts the discharge pressure of the sealing material to a discharge pressure lower than the discharge pressure; and a switch means provided in the main delivery passage downstream of the communication state switching solenoid valve. and a solenoid valve that is driven based on a state in which the branch passage intervening pressure regulating valve and the sealing gun are communicated with each other, and a solenoid valve that is driven based on a state in which the branch passage intervening pressure regulating valve and the sealing gun are communicated with each other, and a solenoid valve that is driven based on the branch passage intervening pressure regulating valve and the sealing gun. and a state in which the sealing gun is communicated with each other.