JPS6297663A - Automatic emitting apparatus of adhesive emitting gun - Google Patents

Abstract

PURPOSE:To prevent the curing of an adhesive in a nozzle at a non-working time, by using an automatic emitting apparatus equipped with an operation member capable of intermittently operating the trigger of an adhesive emitting gun. CONSTITUTION:During the stand-by time of coating work or at the time of the short halt of said work, an adhesive emitting gun 3 is set to the holder 21 of an automatic emitting apparatus 1. By this method, a solenoid is excited at the interval of the set time of a timer over the length of the set time and a solenoid valve 42 is opened to supply compressed air to the upper chamber of an air cylinder 35 and a piston rod is fallen. Whereupon, an arm 30 rotates around a pin 34 toward the direction shown by an arrow and the rod like member 32 of said arm 30 pushes the trigger 4 of the emitting gun 3 and, as a result, the adhesive in a static mixer 5 is intermittently and automatically emitted.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device that automatically discharges adhesive from a nozzle portion at the tip of an adhesive discharge gun by pulling the trigger of the gun.

(Prior Art) For example, a two-component mixture type adhesive obtained by mixing a base agent and a curing agent has been developed as an adhesive to be applied to an object in a factory or the like. A discharge gun is used when applying this two-component adhesive. This discharge gun has two discharge pipes, as seen in, for example, Japanese Utility Model Publication No. 58-11415 and Japanese Patent Publication No. 60-12101. Then, the two liquids, the base agent and the curing agent, are pumped from different tanks to the discharge pipe of the gun body,
Discharge to the target object from the nozzle part of each discharge pipe.

However, with the above configuration, since the two liquids are simply discharged onto the target object, the two liquids are not mixed sufficiently, and the function of the adhesive may not be fully exerted. Therefore, a discharge gun may be considered in which a mixing section is disposed on the distal end side of the discharge pipe, and the two liquids are mixed in this mixing section and then discharged.

(Problem to be Solved by the Invention) However, in the case of a discharge gun of the type that mixes two liquids in the mixing section, the adhesive remaining in the mixing section may accumulate over time during waiting times or pauses in the application process. It may harden and become unusable. Therefore, the dispensing gun cannot be reused unless it is stored at a cold temperature during suspension, the mixing part is cleaned with a solvent, or it is replaced.
The application process was complicated.

Incidentally, a similar drawback exists even in the case of a discharge gun that applies a liquid-type adhesive.

(Means for Solving the Problem) This invention was made to solve the above problem, and its gist is that by pulling the trigger of the adhesive discharge gun, the nozzle at the tip of the adhesive discharge gun A device that automatically discharges adhesive includes (a) a device base, (b) a holder attached to the device body and holding the discharge gun, and (c) a holder movably supported by the device body and whose an actuating member arranged so that its movement trajectory passes through the trigger of the discharge gun; and (d) an actuating member that is attached to the main body of the device and driven at predetermined time intervals to move the actuating member in the direction of pulling the trigger of the discharge gun. An automatic dispensing device for an adhesive dispensing gun is characterized in that it is equipped with a drive device for discharging adhesives.

(Function) When waiting for coating work or when taking a short break, set the adhesive dispensing gun in the holder of the automatic dispensing device. The actuating member of the automatic dispensing device triggers the dispensing gun, and the adhesive is automatically dispensed at predetermined time intervals from the nozzle section at the tip of the dispensing gun, thereby preventing the adhesive from curing within the nozzle section. .

(Example) Hereinafter, an example of the present invention will be described based on the drawings from FIG. 1 to FIG. 6.

Reference numeral 1 in the figure is an automatic discharge device, and adhesive discharge gun 3
By pulling the trigger 4, the adhesive C is automatically discharged from the nozzle portion 6 at the tip of the discharge gun 3.

The adhesive discharge gun 3 is of a two-component mixing type, and has a static mixer 5 on the tip side.
The tubes 7a and 7b for supplying raw materials are connected to tanks 8a and 8b for storing the main agent and curing agent. That is, two passages are formed inside the discharge tube 3, and these passages are connected to the tubes 7a and 7.
b and the static mixer 5 are communicated with each other. Each of the passages is provided with an on-off valve, and these on-off valves are opened and closed by a trigger 4.

Pumps 9 a, 9 b for pumping the main agent and curing agent are interposed in the middle of each of the tubes 7 a, 7 b.

The base agent A filled in the base agent storage tank 8a is, for example, a urethane-based material, and the hardening agent B filled in the hardening agent storage tank 81 is, for example, an isocyanate-based material. As a result, when the trigger 4 of the discharge tube 3 is pulled, the valves are opened and each tube 7a,
7b, the two liquids of the main agent A and curing agent B flow into the static mixer S, where they are mixed to obtain the urethane resin adhesive C, which is discharged from the nozzle part 6 at the tip of the static mixer 5. It has become so.

The automatic discharge device 1 has a device main body 2.

The device main body 2 is composed of a box-shaped operation panel 10, a bracket 20 having a U-shaped cross section fixed to one side of the milling board 10, and a tank 50 fixed to the side of the pond of the milling board 10. ing.

On the front side 10a of the cutting board 10, there is a power switch 11,
Power indicator light 12. Gun set indicator light 13° Gun removal prohibited indicator light 149 Manual discharge button 15° Timer operation part 1
6 is removed and 1 inch is removed from each.

A holder 21 for holding the adhesive discharge gun 3 is attached to the bracket 20 (1). This holder 21
consists of an upper holder 22, a lower holder 23, and a holder base 24.

The upper holder 22 is formed in a cross-sectional shape and protrudes forward from the center of the upper end of the front face 2( )a of the bracket 20. The lower holder 23 is formed in a cylindrical shape, and has a large diameter portion 23.
a and a small diameter portion 23c.

Four plate-shaped portions 23b are formed on the upper surface of the large diameter portion 23a, and a hollow 3a for mounting the static mixer 5 of the discharge gun 3 is brought into contact with this recess 23b. The small diameter portion 23c is inserted into a large diameter hole 24a and a small diameter hole 24b formed in the holder base 24, and is prevented from being pulled out upward by a C-shaped retaining ring 25 attached to the tip. At the same time, it is supported by a bearing 26 fitted in the large diameter hole 24a so as to be vertically movable and rotatable. The bearing 26 and the large diameter portion 23a
A spring 27 is interposed between the lower holder 23 and the lower holder 23 to constantly urge the lower holder 23 upward. Above holder base 2
4 is attached to a mounting member 28 fixed approximately at the center of the front surface 20a of the bracket 20 with a pin 29.

Further, an arm (operating member) 30 that automatically operates the trigger 4 of the discharge gun 3 is rotatably supported on the bracket 20 . This arm 30 has a pair of links 31.
31 and a rod-shaped member 32 fixed between the tips of the pair of links 31, 31, forming a U-shape. The middle part of the pair of links 31 and 31 is the front side 20a of the bracket 20.
It is rotatably supported via a pin 34 between the upper ends of a pair of supporting metal fittings 33, 33 fixed to the upper part of. The base ends of the pair of links 31.31 are connected to a pair of elongated holes 20b, 20 formed in the upper part of the bracket 20 and extending in the vertical direction.
b, and protrudes from the back surface 20c of the bracket 20.

An air cylinder (drive device) 35 is attached to the center of the back surface 20c of the bracket 20.

The lower end of the air cylinder 35 is rotatably supported by a knuckle joint 36 and a pin 37 fixed to the lower part of the back surface 20c. A connecting member 39 having approximately the same length as the rod-shaped member 32 of the arm 30 is fixed to the upper end of the piston rod 38 of the air cylinder 35 . At both ends of the connecting member 39, base end portions of a pair of links 31, 31 of the arm 30 are rotatably supported on pins (not shown). Further, the position of the connecting member 39 at the top dead center of the piston rod 38 can be adjusted by a pair of stoppers 40, 40 screwed onto the bracket 20.

A pair of stoppers 40. Bracket between 40) Front side 2 of 20
A limit switch 41 is provided at 0a. Further, a solenoid valve 42 is attached to the second rear surface 20c of the bracket 20. This solenoid valve 42 is provided in a pipe 44 that connects the air cylinder 35 and a compressed air supply source 43 (FIG. 4).

The aforementioned power indicator light 12. Gun set indicator light 13, gun removal prohibition indicator light 14, and limit switch 41. The solenoid valves 42 are connected to each other by a relay sequence circuit shown in FIG.

To explain in detail, each indicator light 1 is installed between the two power buses R and S.
2, 13, 14 and the solenoid SQL of the electromagnetic valve 42 are connected, as well as relays CR1, CR2 and timers TRI, TR2, TR3. A power switch 11 is interposed between the power bus lines R and S on the power source side of the power indicator lamp 12, and a limit switch 41 is interposed between the power source bus line R and the power indicator lamp 12 and the Ganset indicator lamp 13. It is mediated. A parallel circuit consisting of the a contact of timer TR3 and the a contact of relay CRI and the contact of timer TR2 are connected in series to relay CRI. Timer TRI, TR2゜TR3j:l
i, the b contact 11 of the relay CR1, the a contact of the lz-CRI, and the a contact of the timer TRI are connected in series, respectively. A parallel circuit consisting of the a contact of the timer TRI and the a contact of the relay CRI is connected in series to the relay CR2. The gun removal prohibition indicator light 14 has a relay C.
The a contact of R2 is connected in series. Solenoid SQ
A parallel circuit consisting of the a contact of relay CR1 and manual discharge button 15 is connected in series to L.

A polyether plasticizer (not shown), for example, is stored in the tank 50 as a hardening inhibitor.

In the above-described configuration, when waiting for coating work or taking a short break, the adhesive dispensing gun 3 is simply set in the holder 21 of the automatic dispensing device 1, and the adhesive is dispensed from the nozzle portion 6 at the tip of the static mixer 5 of the dispensing gun 3. Since the adhesive C is automatically discharged, the adhesive C inside the static mixer 5
can be prevented from curing. That is, when the power switch 11 of the operation panel 10 of the automatic dispensing device 1 is turned on, the power indicator light 12 lights up. After confirming this lighting, the discharge gun 3 is set in the holder 21. In this case, insert the nozzle part 6 at the tip of the static mixer 5 of the discharge gun 3 into the lower holder 23, and press it down once against the spring 27 with the oak 3a in contact with the four parts 23) of the large diameter part 23a. . Next, when this pressing force is released, the discharge gun 3 moves upward and hits the upper holder 22, and the upper holder 22 and the lower holder 23 are held open. At this time, the protrusion 3 of the discharge gun 3
b activates the limit switch 41, so the power point indicator light 13 lights up.

When the limit switch 41 is activated, the timer TR
A voltage is applied to I, and its a contact is closed after a set time (for example, 5 minutes) has elapsed. Then, the relay CR2 is energized and its a contact closes, and the gun removal prohibition indicator light 14 lights up, warning that the discharge operation of adhesive C, which will be described later, is approaching. prohibited.

When the a contact of the timer TRI is closed, a voltage is applied to the timer TR3 for a set time (for example, 10
(seconds), close the a contact.

Then, relay CRI is energized, closing its a contact and opening its b contact. In addition, relay CR1 is
It is self-retained by closing one of the contacts.

At this time, solenoid SQL is excited. Then, the solenoid valve 42 opens, compressed air is supplied to the upper chamber of the air cylinder 35, and the piston rod 38 descends. This lowering of the piston rod 38 causes the arm 30 to rotate about the pin 34 in the direction shown by the arrow in FIG. 1, and the rod-like member 32 pushes the trigger 4 of the discharge gun 3. This results in
A valve provided in the internal passage of the discharge gun 3 opens, and the pump 9
Base agent A and curing agent B sent from at 9 b
At this pressure, the adhesive C accumulated in the static mixer 5 is discharged from the nozzle part 6.

When the a contact of the above relay CRI is closed, the timer T
Voltage is applied to R2, and after the set time (for example, 5 seconds) has elapsed, its B contact is opened, so relay CRI becomes de-energized, its A contact opens, and the relay/id SQL becomes de-energized, causing electromagnetic The valve 42 is switched to block the connection between the compressed air source 43 and the upper chamber of the air cylinder 35, and the compressed air in the upper chamber escapes to the outside. As a result,
The piston rod 38 of the air cylinder 35 rises due to the return force of the built-in spring, and the arm 30 rotates and returns to its original position, completing the discharge operation of the adhesive C.

In timer TRI, relay CRI is energized and its b
When the contacts open, the voltage load is stopped. Then, when this relay CRI becomes de-energized as described above, voltage is applied again to perform the above operation. Also, relay CR
2 is energized when either the a contact of timer TR1 or the a contact of relay CRI is closed, so the removal prohibition indicator light 14 lights up for 10 seconds before dispensing adhesive C and for 5 seconds during dispensing. are doing.

In this way, if the discharge gun 3 is connected to the automatic discharge device 1, the timer T
Static mixer 5 for the length of time set in R2.
Since the adhesive C inside is discharged, this adhesive C does not harden inside the static mixer s. Therefore, after the waiting time for the coating operation ends or after a short break, the discharge gun 3 is removed from the holder 21 of the automatic discharge device 1 and the coating operation can be performed immediately.

In addition, the setting times of timers TRI, TR2, and TR3 are as follows.
The timer operation section 16 allows adjustment according to the types of the main agent A and curing agent B.

When the coating operation is to be stopped for a long time, the static mixer 5 is removed from the tip of the discharge gun 3, and the tip of the discharge gun 3 and the static mixer 5 are soaked in the anti-hardening agent in the tank 50. Various embodiments are possible without being limited to the above embodiments. For example, it goes without saying that the automatic dispensing device configured as described above can also be used in a dispensing gun that applies a liquid-type adhesive.

(Effects of the Invention) As explained above, in the present invention, by pulling the trigger of the adhesive dispensing gun with the operating member of the automatic dispensing device,
Since the adhesive is automatically discharged intermittently from the nozzle at the tip of the dispensing gun, it is possible to prevent the adhesive from curing inside the nozzle at the tip of the dispensing gun during waiting times or during short breaks in the application process. can be prevented. the result,
The dispensing gun can be used immediately after the waiting time for coating work or after a short break, making the coating work easy.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an enlarged cross-sectional view showing the adhesive dispensing gun set in an automatic dispensing device, and FIG. 2 is a section taken along the line ■-■ in FIG. 3 is a front view of the automatic dispensing device, and FIG. 4 is a front view showing the adhesive dispensing gun set in the automatic dispensing device.
FIG. 5 is a beam control circuit diagram, and FIG. 6 is a time chart. DESCRIPTION OF SYMBOLS 1... Automatic discharge device, 2... Device main body, 3... Adhesive discharge gun, 4... Trigger, 6... Nozzle part,
21... Holder, 30... Arm (operating member),
35...Air cylinder (drive device), A...Main agent,
B...Curing agent, C...Adhesive.

Claims (1)

[Claims] (1) A device that automatically discharges adhesive from a nozzle at the tip of the discharge gun by pulling the trigger of the discharge gun, which includes (a) the main body of the device; a holder that holds the discharge gun; (c) an actuating member that is movably supported by the device body and arranged so that its movement trajectory passes through the trigger of the discharge gun; (d) an actuating member that is attached to the device body and that An automatic dispensing device for an adhesive dispensing gun, comprising: a drive device that is driven at time intervals to move the operating member in a direction in which the trigger of the dispensing gun is pulled.