JPH0628752B2 - Application gun - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention enhances the accuracy of the mixing ratio of the coating agent and improves the handleability by installing a pump driven together by a rotating machine in each coating agent passage. The present invention relates to an application gun that can be used to apply a multi-liquid mixed type coating agent that can be enhanced.

[Conventional technology]

In recent years, a multi-liquid mixed type coating agent that uses a mixture of a so-called multiple liquids such as polyester, polyurethane and other paints and adhesives, which is cured by mixing a main material with auxiliary agents such as catalysts and accelerators, has been widely used in recent years. Is being done.

To apply such a multi-liquid mixed type coating agent, conventionally,
For example, Japanese Utility Model Publication No. 60-36377 and Japanese Utility Model Publication No. 58-4
As disclosed in Japanese Patent Publication No. 0254, a mixer provided separately from the coating gun is used to mix the coating materials supplied from the respective feeders, and the mixture is supplied to the coating gun via a hose or the like. ing.

In addition, a plurality of spray guns are integrated into a multi-barrel type gun, and the coating agents are supplied to the respective spray guns from different coating agent supply devices, and the spray guns simultaneously atomize to mix them. It is also known to spray while doing so.

[Problems to be Solved by the Invention]

However, the above-described mixing of the coating material by the mixer located apart from the coating gun causes the size of the apparatus to be large, and the mixed coating material remaining between the coating gun and the mixer at the end of the work. Also, the coating material remaining in the mixer must be discharged for the next use, resulting in waste of the coating material.

In addition, the multi-cylinder type is sometimes inferior in mixing efficiency and atomizes, so that for uniform mixing, the amount of coating material and air to be fed to each spray gun should be kept constant. There is also a problem that the coating agent has to be fed under pressure, which leads to an increase in the size of the apparatus.

The present invention, by providing a pump driven by a rotating machine in each coating material flow passage, enhances the handling while mixing the coating material at a relatively high precision ratio, and improves the coating quality,
It is an object of the present invention to provide a coating gun which can be downsized as a whole of the coating apparatus, reduce the amount of residual coating agent mixed, and save resources.

[Means for Solving the Problems]

The present invention relates to a gun body, a plurality of coating material flow passages, one end of which is connected to a coating material supply device and the other end of which is connected to a discharge port which is connected to a mixer disposed in the gun body, a rotating machine, and this rotating machine. An operating portion for turning on and off the drive, a trigger pivotably supported on the gun body and capable of pressing the operating portion, and capable of being separated from the operating portion by flipping up, in each of the coating material flow paths, Each of the pumps is driven by a rotating machine and sends out the coating material in the coating material flow path, while it is provided with a locking tool capable of holding the trigger in a flip-up state with respect to the gun body. It is an application gun.

[Action]

In this way, a plurality of liquid-mixing type coating agents are supplied to the plurality of coating agent channels, respectively. Further, a pump driven by the rotation of the rotating machine pressure-feeds each coating material in the coating material flow path and delivers it to the discharge port leading to the mixer. When the pump is driven by a rotating machine, each coating material is sent out at a constant ratio and mixed by a mixer, so that the mixing agent is a mixture of multiple liquids mixed at an accurate ratio. Is discharged from.

The mixing ratio can be adjusted by using a rotary pump such as a gear pump as the pump and making it replaceable. In addition, the rotary machine can be turned on and off by pressing the trigger, and by holding the trigger in the flipped-up state using a locking device, it is possible to directly operate only the operation part with fingers, and handleability is improved. Can be raised.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. First to
FIG. 6 shows that the coating gun 1 of the present invention has a mixer 2 at its tip and is formed as a coating gun for continuously coating a two-liquid mixing type coating agent while mixing with the mixing vessel 2. The case is shown.

The coating gun 1 includes a gun body 3 having the mixer 2 at its tip.
In addition, it is possible to supply a coating fluid passage 6 which has one end connected to the discharge ports 4 and 4 communicating with the inside of the mixer 2 and which is opened and closed by a coating material on-off valve 5, and a cleaning liquid for cleaning the coating material after use. A cleaning liquid flow passage 9 that is opened and closed by the cleaning liquid opening / closing valve 7 is provided. A pump P for delivering the coating material in the coating material passage 6 is interposed in the coating material passage 6, and an operation source for driving the pump P and delivering the coating material is provided in the gun body 3. A rotating machine M is provided. In addition, the rotating machine M is a fluid motor that is rotated by a fluid such as high-pressure air in this example, and the gun body 3 includes an operation unit 12 that turns on and off the operation of the rotating machine M.
A trigger 15 capable of pressing the operating portion 12 is provided, and an operation flow passage 11 for feeding high pressure air is provided in parallel. In this example, the coating gun 1 has a symmetrical shape about a vertical cross section including the center thereof, the air flow passage 11 is arranged on the symmetrical plane, and the coating liquid flow passages 6, 6 and the cleaning liquid flow passage are provided. Since both 9 and 9 are bilaterally symmetrical, one of the left and right flow paths 6 and 9 will be described below, if necessary.

The gun body 3 includes a lower base member 23 having a mounting portion 22 bulged on the upper end of the rod 21, an upper base member 24 bolted to the upper surface of the lower base member 23, and a bracket bolted to the front surface of the upper base member 24. 25 and a pump case 26 that is bolted to both side surfaces of the upper base 24 and houses the pump P, and the rotating machine M is fixed to the rear surface of the upper base 24.

As shown in FIG. 6 in which the upper base member 24 is divided along the plane of symmetry, the upper base member 24 is formed by cutting out the front surface and the upper surface of the rectangular parallelepiped base portion 27.
By forming A, side wall portions 27C, 27C and a rear wall portion 27D that are continuous in a U shape are formed on both side edges and the rear edge of the thick bottom plate portion 27B.

Further, the rotating machine M straddles the bottom plate portion 27B and the rear wall portion 27D and is screwed into a recess provided on the rear surface of the symmetry plane, and its output shaft MS has an upper surface of the bottom wall portion 27B. Is notched and protrudes into the recess 27E that opens at the recess 27A, and its tip is pivotally supported by a bearing provided on the front wall of the recess 27E. A worm W, which is a transmission mechanism in this example, is screwed to the output shaft MS, and the worm W is attached to the rotary shaft 28 pivotally supported by the side wall portions 27C and 27C and is provided in the recess 27A. Engage with the worm wheel WH located.

As shown in FIG. 3, the working flow passage 11 for driving the rotating machine M has upper and lower holes 29 and 30 extending in front and rear and in parallel on the plane of symmetry of the mounting portion 22, and also below. Hole 30
An operating on-off valve 10 is provided at the front end of the. The actuating on-off valve 10 has a valve shaft 32 extending from a valve 31 that comes into contact with and separates from a valve seat of a valve box, and projects toward the front of the mounting portion 22 and has its tip located outside the gun body 3 and operated by fingers. A push button-like operation unit 12 is provided. The operation opening / closing valve 10 is configured such that the hole 31 and the operation opening / closing valve 10 are moved by retracting the valve 31 by pushing and pulling the operation portion 12.
Of the air flow leading to the rotary machine M through the hose from the hole portion 30 to the tilt hole 34 and the hole portion 29 by connecting the swash hole 34 which communicates with the periphery of the valve box. Open road 11. Further, the air passage 11 is closed by releasing the operating portion 12, and thus the operation opening / closing valve 1
0 turns on / off the rotating machine M which is the operation source for delivering the coating material. At the rear end of the hole 30, a connecting fitting 35 for connecting to a high pressure air source such as a compressor is attached.

As shown in FIG. 1, FIG. 3, and FIG. 4, the coating material flow path 6 includes a connecting fitting 36 for connecting one end to a coating material supply device (not shown) via a hose. Further, as shown in FIG. 4, the coating material flow path 6 includes a hole portion 37 in which the connection fitting 36 is provided,
A hole 37 and a small-diameter hole 39 extending upward at a right angle are provided, which are shown by the alternate long and short dash line in the figure and shown in the lower part of FIG.
The hole 39 is continuous with the hole 40 of the upper base 24.

The hole portion 40 extends from the lower surface of the bottom plate portion 27B upward to the side wall portions 27C and 27C, and the hole portion 40 extends to the side wall portion 27B.
It is connected to a lateral hole 47 communicating with a pump chamber 46 formed in the pump case 26 attached to each outer surface of C.

The pump chamber 46 accommodates pump members G1 and G2 of the pump P. In this example, the pump P is the pump members G1, G
A rotary pump, which is a gear pump using a gear as 2, is formed. As the rotary pump, in addition to the gear pump, a trochoid pump, or a vane pump using one disc body,
A screw pump or the like can also be used.

One of the pump members G1 and G1 is detachably screwed to the rotary shaft 28. The outer periphery of the other pump member G2 is guided by the inner surface of the pump chamber 46 and is driven. The pump case 26 is bolted to the upper base 24 as described above, so that the pump P can be easily replaced by removing it. At the time of replacement, it is possible to change the discharge amount of the pump P by using pump members G1 and G2 having different pitch radii and modules and changing the width dimension, and the pump members G1 of the left and right pumps P have the same rotary shaft 28. By being attached to the base material, the correct ratio of the coating material can be always delivered.

The lateral hole 47 forms a suction port in the pump chamber 46, and the side wall portion 27C is provided with a lateral hole 50 serving as a discharge port of the pump chamber 46. The lateral hole 50 is formed on the front surface of the side wall portion 27C. The hole 51 communicates with a hole 52 provided on the rear surface of the bracket 25 while communicating with the hole 51 that opens.

In the bracket 25, a protrusion 55 to which the mixer 2 is attached is formed on the inner surface of a square base portion 53, and the hole portion 52 is provided with the protrusion 5 through an inwardly extending hole portion 56.
5 is connected to a small hole 57 communicating with the discharge port 4 at the tip. Therefore, the coating material flow path 6 is
The other end communicates with the discharge port 4 through the holes 37, 39, 40, the lateral hole 47, the pump chamber 46, the lateral hole 50, the holes 51, 52, 56, and the small hole 57, while the coating fluid passage 6 is provided. In this example, the one opened and closed by the coating material opening / closing valve 5 provided in the hole 37 is exemplified.

As shown in FIG. 4, the coating material opening / closing valve 5 includes an inner surface of the mounting portion 22 of the lower base body 23 that forms the gun body 3 in a valve 59 that contacts and separates from a valve seat of a valve box screwed into the hole portion 37. A valve stem 14 is airtightly projecting from the valve stem. Therefore, by pushing and pulling the valve shaft 14 against the spring on the back surface of the valve 59, the large diameter portion of the back portion of the hole portion 37 and the tip thereof and the small diameter portion communicating with the hole portion 39 can be electrically connected and closed by opening. Thus, the coating material flow path 6 is divided into an upstream portion 6A between the coating material on-off valve 5 and the connecting fitting 36 and a downstream portion 6B between the discharge port 4. The connection fitting 36 is connected to a coating material supply device (not shown) via a hose.

As shown in FIGS. 1 and 4, the cleaning liquid flow path 9 has a hole through which one end communicates with a cleaning liquid supply device (not shown) and a connection fitting 62 provided on the rear surface of the mounting portion 22 is screwed. 63
And a hole 64 that intersects the hole 63 at a right angle. The inner end of the hole 64, that is, the other end of the cleaning liquid flow path 9 is the downstream portion 6B of the coating flow path 6 and the opening / closing of the coating material. It communicates with the vicinity of the valve 5.

Further, the hole portion 64 has a step having a small diameter in the inner depth thereof, and the hole 64 is opened and closed by screwing it in and out of the step to open and close the cleaning liquid passage 9. Is provided.

The cleaning liquid on-off valve 7 has a screw type valve shaft, and instead of the operation on-off valve 10 and the paint on-off valve 5 described above, the one operated by a push button or a trigger, or the opening. It is also possible to use a device provided with an appropriate locking means for locking in a state.

The mixer 2 has an appropriate agitator 7 for mixing the coating material inside a cylindrical body 71 having a tapered portion at the front end.
2 is provided, and the mixer 2 can be detachably attached to the protrusion 55 of the bracket 25.

Further, the valve shafts 14, 14 of the coating material on-off valve 5 in this example can be operated together with the operating portion 12 of the air on-off valve 10 by using a trigger 15 which can be repelled and can hold a repelled state.

The trigger 15 is a protrusion 23 provided at the front end of the lower substrate 23.
The front edges of the arm pieces 73, 73 attached to both sides of A and extending downward beyond the operating portion 12 are connected by a joint piece 74 below the height position of the operating portion 12. The pieces 73, 73 can press the valve shaft 14 of the coating material on-off valve 5 and the joint piece 74 can push and pull the operation portion 12 to operate. At the front end of the protruding portion 23A that pivotally supports the trigger 15, as schematically shown in FIGS.
A ball 75, which is urged outward by a spring and a part of which protrudes from the side surface, and a concave portion 76 provided in the trigger 15 that is locked to the ball 75 when the trigger 15 is in the flipped-up state. The trigger 15 can be held in the flipped-up state by providing the locking tool 16 consisting of. Therefore, by opening the front of the operating portion 12, the valve shaft 1
It is possible to freely operate only the operation section 12 with fingers without operating the operation units 4 and 14, and it is possible to freely open and close only the operation flow passage 11.

It should be noted that, instead of such a locking tool 16, for example, it may be formed by using a screw or the like provided on the trigger 15 and abutting the protruding portion 23A in the flipped-up state, or a spring piece locked in the flipped-up state. Using the locking tool 1
6 can also be formed.

However, one end of the coating material flow path 6 is connected to a coating material supply device (not shown) via a hose connected to the connecting fitting 36. As the coating material supply device, in addition to the one that pumps the coating material under pressure, a device that does not have a pumping device or a device that has a small pressure feeding pressure can be used. Also the working flow path 11
A high-pressure air source (not shown) such as a compressor is connected to the connecting fitting 35. Furthermore, the cleaning liquid flow path 9 is connected to a cleaning liquid supply device (not shown) by a connection fitting 62. As the cleaning liquid supply device, in addition to a pressure-feeding type, a device with low pressure-feeding pressure and a device that does not pressure-feed can be used.

Next, the trigger 15 is operated. By operating the trigger 15, the valve shaft 14 of the coating material opening / closing valve 5 and the operating portion 12 of the actuation opening / closing valve 10 are pulled. As a result, the high-pressure air from the high-pressure air source flows into the rotary machine M through the working flow path 11, and the rotary machine M
To rotate. Therefore, the rotary shaft 28 is driven via the worm W and the worm wheel WH of the output shaft MS, and the pumps P on both sides of the rotary shaft 28 are rotated. At the same time, the coating material flow path 6 is opened so that the coating material from the coating material supply device flows into the pump chamber 46 from the lateral hole 47 and is discharged from the lateral hole 50 as the pump P rotates. , The discharge ports 4 and 4 are fed into the mixer 2. The pump member G1 of each pump P is attached to the same rotary shaft 28 and rotates the same, so that the two coating materials are sent to the mixer 2 at a constant ratio and mixed by the mixer 2, and the tip ends thereof. Discharge from.

Further, at the end of the work, by opening the cleaning liquid opening / closing valve 7 and holding the trigger 15 in a state of being flipped up by the locking member 16, the operating portion 1 of the operating opening / closing valve 10 is held.
Only 2 can be operated. As a result, high-pressure air is sent to the rotary machine M to drive the pumps P, P. The coating material on-off valve 5 is closed, so that the cleaning liquid flowing in the cleaning liquid flow 9 is sent to the coating material flow path 6 in the vicinity of the coating material opening / closing valve 5.
Further, the cleaning liquid flows through the downstream portion 6B of the coating material flow path 6 and flows into the mixer 2 through the discharge port. As a result, the mixer 2
At the same time, the next work is facilitated by cleaning the downstream portion 6B such as the pump P.

In addition, in the coating gun 1 of the present invention, as the rotating machine M,
An electric motor can be used, and in that case, a switch for turning the electric motor on and off can be used as the operation on-off valve instead of the operation on-off valve 10. The coating gun 1 can also be formed as a spray gun that atomizes and sprays the mixed coating material. At this time, an appropriate air flow path can be branched from the working flow path 11 and the mixed coating material can be formed by atomizing and spraying. Further, by providing a large number of coating material flow passages and interposing pumps P in each of them, various modifications can be made such that a larger number of coating materials are mixed and discharged.

〔The invention's effect〕

As described above, in the coating gun of the present invention, the pumps that are driven together by the rotating machine are provided in the plurality of coating material flow paths leading to the mixer, so that a plurality of liquid-mixing type coating materials are mixed in the correct ratio. Can be discharged while In addition, compared to the conventional one in which a mixer is separately placed, the supply pressure of the coating material supply device can be reduced, the device can be downsized as a whole, and it can be formed at low cost, and it has excellent handleability and work efficiency. Can be improved.
Also, by making the pump replaceable, it becomes possible to adjust the mixing ratio. Furthermore, since the trigger can be held in the flipped-up state, the operation unit for turning the drive of the rotary machine on and off can be directly operated by the fingers without being obstructed by the trigger, and the effect is that the trigger does not interfere with other members. Many effects can be achieved, such as being more effective when operated.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a front view showing a part of it in section, and FIG. 3 is a cross-sectional view of a part of FIG. FIG. 4 is a sectional view illustrating a coating material on-off valve and a cleaning liquid flow path, FIG. 5 is a sectional view showing a part of the coating material flow path, and FIG. 6 is an exploded perspective view. 2 ... Mixer, 3 ... Gun body, 4 ... Discharge port, 5 ... Coating material opening / closing valve, 6 ... Coating material flow path, 7 ... Cleaning liquid opening / closing valve, 9 ... Cleaning liquid flow path, 10 ... ... Actuating on-off valve, 11 ... Air flow path, 12 ... Operating part, 14 ... Valve shaft, 15 ... Trigger, M ... Rotating machine, MS ... Output shaft, P ... Pump.

Claims (6)

[Claims] 1. A plurality of coating material flow passages, one end of which is connected to a coating material supply device and the other end of which is connected to a discharge port which is connected to a mixer disposed in the gun body, a rotating machine, and a rotating machine. An operating portion for turning on and off the drive of the machine, a trigger pivotally supported by the gun body so as to be releasable and capable of pressing the operating portion, and being separated from the operating portion by repelling, and each of the coating material flow paths,
Each of the pumps is driven by the rotating machine and sends out the coating material in the coating material flow path, while the locking tool is provided for holding the trigger in a flip-up state with respect to the gun body. Applicable gun. 2. The coating gun according to claim 1, wherein the pump is a rotary pump. 3. The coating gun according to claim 2, wherein the rotary pump is a gear pump. 4. The coating gun according to claim 2, wherein the rotary pump is replaceable. 5. The coating gun according to claim 1, wherein the rotating machine is a fluid motor. 6. The coating gun according to claim 1, wherein the rotating machine is an electric motor.