JPH0618607Y2 - Rotary fluid ejector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention is a rotary fluid ejecting device for ejecting a fluid such as an adhesive on the circumference.

<Prior Art> Conventionally, this type of rotary fluid discharge device has been used in an adhering process in a speaker assembling process, for example, and its structure is as follows.

As shown in FIG. 3, a fluid such as an adhesive is pumped from the raw material tank (2) to the joint portion (5) by the pressurized air (1). The fluid transferred from the joint part (5) to the rotary shaft (7 ') passing through the central hole (9') around the central shaft passes through the hose (10) and is attached to the lower end of the rotary shaft (7 ') by an arm. It is supplied to an electromagnetically actuated valve (38) equipped with a Teflon diaphragm arranged at the tip of (11).

On the other hand, the control signal from the control box (26) is input to the electromagnetically actuated valve (38) via the carbon brushes (40), (40), and the diaphragm (39) is turned on when the valve (38) is ON. When activated, the fluid is discharged through a nozzle (13) arranged downward at the tip of the rotating arm (11). Valve (38) is O
When it becomes FF, the diaphragm (39) closes the fluid path by the force of the spring (42) and the discharge of the fluid from the nozzle (13) is stopped.

<Problems to be solved by the invention> Therefore, in the conventional rotary fluid discharge device of this kind, when the fluid is a fluid with low viscosity such as Elmadion adhesive, it is possible to reduce the gap in the diaphragm of the electromagnetically actuated valve. It flows in and hardens, the valve does not work,
There were many accidents such as leaks when the valve was off.

In addition, if the discharge amount of fluid per hour is increased, the spring of the electromagnetically actuated valve cannot withstand the discharge amount,
Even if the valve is OFF, fluid easily leaks, so increasing the proof stress of the spring will increase the size of the valve itself, making it unsuitable for rotating by attaching it to the tip of the rotating arm, and operating the diaphragm. There is a drawback that the amount of heat generated by the coil becomes large and the fluid passing in the immediate vicinity is adversely affected. Furthermore, the magnetic iron parts of the electromagnetic valve rust due to the corrosiveness of the fluid, so that the service life of the parts cannot be extended.

Therefore, in order to solve the conventional problems, the present invention uses an air-actuated cylinder instead of the conventional electromagnetic valve to avoid rusting of parts, and a control signal to a 5-port directional valve. By inputting and sending control air to the air-actuated cylinder to turn ON / OFF the discharge of the fluid, the rotary type fluid discharge that turns ON / OFF the supply of a large amount of fluid stably for a long period of time The purpose is to obtain the device.

<Means for Solving Problems> A configuration of the present invention for achieving the object will be described with reference to FIG. 1 and FIG. 2 corresponding to an embodiment.
The control signal of the control box (26) that outputs a control signal in synchronization with the rotation of the rotary shaft (7) is input-connected to the switching valve (19), and the compressed air for control is discharged by the switching valve (19). Air-actuated cylinders that are alternately switched to the inlet holes (20) and (21) and are opened and closed by the control air through the control air passage holes (15) and (16) formed in the rotary shaft (7). In the rotary fluid discharge device that controls the (12) and discharges the pressurized fluid from the nozzle (13) according to the operation of the air-actuated cylinder (12), another control is performed in the vicinity of the central hole (9). Air passage hole
When the rotating shaft (7) having the holes (15) and (16) is fitted in the bearing (14) in the rotating posture, the control air inflow and outflow holes (20) and (21) provided in the bearing (14) are provided. ) Corresponding to each position
Ventilation grooves (27) provided on the outer periphery of (7), (28) at the bottom of the ventilation passage holes (15), (16) upper opening (17), (18) is provided, the passage hole
Control air input parts (29), (30) of the air-actuated cylinder (12) whose direction is switched by the control signal through the openings (22), (23) provided in the lower part of (15), (16). ) Is connected to control air, and the pressurized fluid (1) flows in from the nozzle (13) through the center hole (9) of the rotary shaft (7), and then stopped. .

<Operation> Since the present invention has such a configuration, the liquid descends through the shaft hole of the rotary shaft core and is guided to the air-actuated cylinder by the hose, while the working signal of the control box is 5 Input to the port direction switching valve, 5 from the air source
Controls the output of the air input to the port directional control valve, and controls the air output from the inlet of the control air passage hole that is bored parallel to the rotary shaft, through the passage, and from the outlet provided at the bottom of the rotary shaft. Guide it through the air hose to the air-actuated cylinder at the end of the arm attached to the lower end of the rotating shaft.

In this way, by the control signal from the control box, when the 5-port directional control valve is ON, the control air passes through the passage in the rotary shaft, passes through the air hose, and operates the air-actuated cylinder to operate the fluid. Is discharged from the nozzle. When the rotary shaft rotates and the switching valve is turned off, the nozzle is switched to another passage hole and the nozzle is turned off. In this way, the device of the present invention can improve the stability of the operation of supplying a large amount of fluid from the nozzle.

<Embodiment> This type of rotary fluid ejecting apparatus, for example, in a speaker assembling process, a fluid adhesive is adhered to the cone paper along the outer edge (often circular) of the frame, or to a damper. A device used in the bonding step of the adhesive, which is opened / closed every rotation by a valve attached to the tip of an arm attached to the lower end of a rotating shaft that moves up and down intermittently. Is a device for coating.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

(1) is a fluid adhesive, which is stored in a sealed tank (2), receives air pressure from a compressed air source (3), passes through a transportation pipe (4), and joins the joint (5). Reach The Joint
(5) is a pipe with a collar, and the lower end of the opening is fitted to the receiving part (8) at the upper end of the rotating shaft (7) via the packing (6) so as to be rotatable. The central axis (9) penetrates the axis of the rotating shaft (7), and the adhesive (1) is pressed from the joint (5) through the packing (6) to the rotating shaft (7). To the bottom edge of. And
From the lower end of the center hole (9) of the rotating shaft (7), through the hose (10),
Adhesive (1) guided to the air-actuated cylinder (12) attached to the tip of the arm (11) attached to the lower end of the rotating shaft (7)
Discharges and stops the pressurized fluid repeatedly by opening and closing the air operated cylinder (12) from the nozzle (13) at the lower end of the air operated cylinder (12). The rotary shaft (7) is rotationally fitted to the bearing (14), and is subjected to rotation control and vertical movement control by another drive source. And, the inside of the rotary shaft (7) is
Two control air passage holes (15) and (16) are provided in parallel with (9), and the upper openings (17) and (18) are located above and below the bearing (14). The bottoms of the grooves (27) and (28) concentrically provided on the outer circumference at the positions corresponding to the air inflow and outflow holes (20) and (21) from the 5-port directional control valve (19) provided at the position. It has a hole in it. (81
a), (81b), (81c) and (81d) are the grooves (27), (2) of the rotary shaft (7).
It is a rotary shaft seal that is provided above and below 8) to prevent air leakage.

Further, the lower openings (22) and (23) are connected to the control air input sections (29) and (30) of the air cylinder (31) of the air actuating cylinder (12) through the air hoses, respectively. Mouth (2
It is provided at the position corresponding to 4) and (25). Further, the 5-port switching valve (19) is input-connected to a control box (26) which outputs a control signal in synchronization with the rotation of the rotary shaft (7), and operates by inputting the control signal described above. The compressed air for control from the air source (3) alternates with the inflow / outflow holes (20), (21) communicating with the control air passage holes (15), (16) formed in the rotary shaft (7), respectively. The air input part (29) for control of the air-actuated cylinder (12) operated by air from the holes (17) and (18) formed in the grooves (27) and (28), respectively. , (30)
In turn, the compressed air for control is alternately sent to vertically move the piston (33) of the air-actuated cylinder (12) to transport the adhesive (1) pressurized by the compressed air source (3). pipe
(4), center hole (9) that passes through the center of the rotating shaft (7), hose (1
It is arranged so as to discharge and stop from the nozzle (13) via (0).

In the case of the above configuration, when the 5-port switching valve (19) is activated by the control signal from the control box (26) and is ON, the compressed air for control is supplied from the inflow / outflow hole (20) to the rotary shaft ( Inflow through the air passage hole (15) of (7), through the opening (22), hose socket (24), from the connection port (29) at the top of the air actuated cylinder (12) to the air cylinder (31). Type in the piston
(33) is pushed down to eject the adhesive (1) from the nozzle (13) (aspect shown in FIG. 1). Next, when the 5-port switching valve (19) is turned off, the control air flows in through the inflow / outflow hole (21), passes through the air passage hole (16) and the receiving port (23), and then the air actuated cylinder (12). ) Cylinder (31) lower air input (3
(0) flows in and pushes up the piston (33), so the nozzle
The entrance of (13) is closed. As a result, in the rotary fluid discharge device of the present invention having the above-mentioned configuration, the adhesive (1) is fed from the nozzle (13) by the control signal from the control box (26) every time the rotary shaft (7) makes one revolution. ) Is repeatedly discharged and stopped alternately.

Although the embodiments considered to be typical of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments, and the constitutional requirements referred to in the present invention and the purpose referred to in the present invention can be obtained. The present invention can be carried out with appropriate modifications within the scope of achieving the following effects.

<Effects of the Invention> As is clear from the above description, the present invention avoids rusting by eliminating the electromagnetically actuated valve, which requires iron parts that are prone to rusting. The controlled ON / OFF operation of the valve is stable and strong because the controlled pressurized air is supplied to the air-operated cylinder by forming a passage hole through which the air passes in parallel with Therefore, even if the fluid has a low viscosity, it will not leak, and it can discharge stably even with a large amount of fluid discharged, and even if it is continuously discharged for a long time, there is no risk of causing trouble due to heat generation. It was possible to expect the above remarkable effects.

[Brief description of drawings]

In the drawings, FIG. 1 is a diagram showing an overall configuration including a partial cross section of the present invention, FIG. 2 is a diagram showing a structure of a rotary shaft of the present invention, and FIG. 3 is a diagram showing a configuration of a conventional example. In the figure, (1) pressurized fluid, (7) rotating shaft, (9) central hole, (12)
Is an air-actuated cylinder, (13) is a nozzle, (14) is a bearing, and (1
5) and (16) are air passage holes, (17) and (18) are upper openings, and (19) is 5
Port switching valve, (20), (21) are air inlet / outlet holes, (22),
(23) is a lower opening, (26) is a control box, (27) and (28) are ventilation grooves, and (29) and (30) are air input parts.

Claims (1)

[Scope of utility model registration request] 1. A control valve (19) for inputting a control signal from a control box (26) which outputs a control signal in synchronism with rotation of a rotary shaft (7), for control by the change valve (19). Compressed air is alternately switched and supplied to the inflow and outflow holes (20) and (21),
Through the control air passage holes (15) and (16) formed in the rotary shaft (7), the air-actuated cylinder (12) that is opened and closed by the control air is controlled and operated, and the air-actuated cylinder (12) is actuated. In the rotary fluid discharge device that discharges the pressurized fluid from the nozzle (13) according to the above, a rotary shaft in which another control air passage hole (15), (16) is formed near the center hole (9) (7) is the bearing (14)
In the rotational posture fitted to the, the control air inflow and outflow holes (20) and (21) provided in the bearing (14) respectively correspond to the positions,
Ventilation grooves (27) provided on the outer circumference of the rotating shaft (7), the ventilation passage holes (15) at the bottom of the (28), (16) upper openings (17), (18) provided,
Control air input section (29) of the air-actuated cylinder (12) which switches the direction by the control signal through the openings (22) and (23) provided in the lower part of the passage holes (15) and (16). , (30) is connected to the control air, and the pressurized fluid (1) is introduced and stopped from the nozzle (13) through the central hole (9) of the rotary shaft (7), and the rotary fluid discharge is configured to stop. apparatus.