JP2004050008A - Paint filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paint filter in which a socket and a plug are attached/detached rapidly, the strength of a filter cartridge is improved without lowering the filtration performance and an O-ring is easily exchanged. <P>SOLUTION: This paint filter consists of the almost cylindrical socket 2 provided with an inflow port 5 at one end of the socket 2 which is communicated with a filtration chamber 4 arranged inside the socket 2 and a means 6 for rapidly coupling the socket 2 to the plug 3 at the other end, and an almost cylindrical plug 3 provided with an inserting part 8 to be inserted freely detachably into the other end of the socket 2 by the means 6, an outflow port 9 arranged at one end of the part 8, and an almost cylindrical filter cartridge 10 which is present in the chamber 4 in the state where it is inserted into the socket 2 and which is freely detachably arranged at the other end of the part 8. The O-ring 12 is fit from the outside to the fitting part 8 of the projecting plug 3 exposed and separated from the socket 2. A reinforcement 11 consisting of a spiral wire is abutted on the inner peripheral surface of the filter cartridge 10. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paint filter installed in a series of pipes provided in a paint unit for circulating paint to a spray gun for spraying paint.
[0002]
[Prior art]
Conventionally, this type of filter has been interposed at various points in a series of piping routes installed in the paint unit in order to remove dust and paint residue contained in the paint. In order to remove paint residue and the like adhering to the filter, the filter body is separated so that the filter inside can be washed or replaced.
Since the filter body is fitted with a plug with a filter detachably mounted in a substantially cylindrical socket, and connected by fastening the socket and the plug with a nut, the attachment and detachment work of the socket and the plug includes: Tools such as a wrench to twist the nuts are required, and it is extremely troublesome, time-consuming and time-consuming to separate the filter bodies that are interposed in the piping and clean the filters. Was.
This filter has a cylindrical shape having a mesh of a predetermined mesh.In a state in which a plug is inserted into a socket, the filter is present in the filter body, and paints and the like contained in the paint as the paint passes through the filter. Although it is filtered, the paint is flowing with a predetermined pressure, so naturally the pressure is also applied to the filter, the shape easily collapses, the filtration performance is significantly reduced, pressure loss occurs, and the filter replacement time It had the drawback of hastening.
In order to solve such a problem, a punching plate is formed in a cylindrical shape, which is provided on the inner peripheral surface of the filter, and the filter is reinforced. This solidified and adhered to the gap between the inner peripheral surface and the punching plate, and eventually resulted in a decrease in filtration performance of the filter and a pressure loss.
In addition, the O-ring, which prevents internal paint leakage when the socket and plug are connected, deteriorates relatively quickly due to erosion due to pigments and solvents contained in the paint, and wear due to the attachment and detachment of the socket and plug. At the time of the above operations such as cleaning, the wear state of the O-ring must be inspected and the O-ring must be replaced if necessary.
However, since this O-ring is mounted at the back of the inner periphery of the socket for receiving the plug, it is difficult to check the wear state of the O-ring, and when exchanging the O-ring, a hand-shaped tool must be used. It is necessary to remove the O-ring inside the socket by using such a technique, and this operation requires skill, and when such an O-ring replacement operation is involved, much more labor and time are required.
[0003]
[Problems to be solved by the invention]
Accordingly, it is an object of the present invention to provide a filter for paint that can rapidly attach and detach a socket and a plug, improve the strength of a filter without deteriorating filtration performance, and facilitate replacement of an O-ring.
[0004]
[Means for Solving the Problems]
In view of the above problems, the present invention provides a substantially cylindrical socket having a filtration chamber therein, an inflow port communicating with the filtration chamber at one end, and a rapid coupling means with a plug at the other end. At the other end of the socket is provided an insertion portion which can be inserted and removed with quick coupling means, and at one end of the insertion portion, an outlet is provided, and at the other end, a filter inside the filtration chamber is attached and detached in a state of being inserted into the socket. The filter is configured by the freely provided substantially cylindrical plug, thereby enabling quick attachment and detachment of the socket and the plug.
In addition, since the O-ring is externally fitted to the insertion portion of the plug to be inserted into the socket, if the plug is pulled out from the socket, the O-ring is exposed on the outer periphery of the insertion portion. O-rings can be replaced without skill.
The filter is formed in a cylindrical shape so as to protrude from the other end of the plug, and a reinforcing material made of a spiral wire is inscribed on the inner peripheral surface of the filter, so that the paint filtered by the filter is reinforced. The above-mentioned problem is solved by preventing the material from adhering and solidifying.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
In the filter according to the present invention, the main body 1 is interposed in a series of piping paths provided in a paint unit (not shown) that circulates and supplies paint to a spray gun (not shown) for spraying an aqueous paint. are doing.
The main body 1 is made of stainless steel, and is interposed between the upstream and downstream of the pipe, and has a socket 2 attached on the upstream side of the pipe and a plug 3 attached on the downstream side of the pipe in a detachable manner.
The socket 2 is formed in a substantially cylindrical shape, and a filtration chamber 4 is provided therein, an inlet 5 communicating with the filtration chamber 4 is provided at one end, and a rapid coupling means 6 with the plug 3 is provided at the other end. I have.
In addition, an upstream pipe connection nut 7 is rotatably mounted on the inflow port 5 with respect to the inflow port 5, and the socket 2 (main body 1) is rotatably connected to the upstream pipe. .
[0006]
The plug 3 is formed in a substantially cylindrical shape, and an insertion portion 8 is provided at the other end of the socket 2 and can be inserted and removed by the quick coupling means 6. A screw portion for connecting a downstream pipe is provided at one end of the insertion portion 8. A formed outlet 9 is provided, and a filter 10 inside the filtration chamber 4 is detachably protruded from the other end in a state of being inserted into the socket 2.
The filter 10 has a mesh-shaped side surface of a predetermined mesh and a circular closed surface at the tip, and is formed in a cylindrical shape smaller in diameter than the filtration chamber 2. A screw portion 10a to be screwed is provided, and a reinforcing member 11 made of a spiral wire is inscribed on the inner peripheral surface of the filter 10.
An O-ring groove is formed in the outer periphery of the insertion portion 8, an O-ring 12 is externally fitted in the O-ring groove, and the main body 1 in a state where the plug 3 is inserted into the socket 2 by the O-ring 12. Prevents paint leakage from inside.
[0007]
The quick-connecting means 6 is provided with a sphere 14 removably fitted in a groove 13 provided around the insertion portion 8 of the plug 3 so that the sphere 14 can be protruded and retracted on the inner and outer peripheral surfaces 15 and 15a of the other end of the socket 2. A plurality of cylinders are provided at equal intervals, and an annular projection 16 that presses the spherical body 14 from the outer peripheral surface 15a at the other end and protrudes from the inner peripheral surface 15 is bulged on the inner peripheral surface 17a. A sleeve 17 is urged by a spring 18 so that the sleeve 17 is fitted on the other end of the socket 2 and the annular projection 16 is arranged on the spherical body 14.
The spring 18 is formed in a coil shape, is fitted to the other end of the socket 2, and has an annular stepped portion 2 a with each end bulging toward the other end of the socket 2, and the annular projection 16 of the sleeve 17. It is interposed between the inner side 16a and the inner side 16a.
A C-shaped concentric retaining ring 19 is externally fitted to the outer periphery of the other end of the socket 2 so as to protrude outward. The retaining ring 19 has a sleeve 17 urged by a spring 18 and an annular projection 16 In a state where the sleeve 17 is located above the sleeve 2, the sleeve 17 is prevented from coming off the socket 2 by contacting the inclined outer surface 16b of the annular projection 16.
The spherical body 14 is formed to have a diameter larger than the thickness of the other end of the socket 2 and is loaded into a plurality of tapered holes 20 formed at equal intervals on the circumference of the other end of the socket 2. The opening 20a on the inner peripheral surface 15 side of the socket 2 has a smaller diameter than the diameter of the sphere 14, and the opening 20b on the outer peripheral surface 15a has a larger diameter than the sphere 14.
The outer surface 16b of the sleeve 17 is shaped so that the sphere 14 does not come out of the tapered hole 20 in a state where the spring 18 is most contracted (see FIG. 3).
[0008]
Next, the operation of the filter according to the present invention will be described.
Normally, as shown in FIGS. 1 and 2, a plug 3 is inserted into a socket 2, the main body 1 is integrated, and a filtration chamber 4 is hermetically sealed by an O-ring 12.
In this state, the sleeve 17 is urged by the spring 18, the annular projection 16 is positioned on the sphere 14, and the sphere 14 is pressed in the centripetal direction of the socket 2. The plug 3 protrudes from the peripheral surface 15 and is locked by being fitted into the groove 13 of the insertion portion 8. Therefore, even if a pressure of the paint is generated in the filtration chamber 4, the plug 3 cannot be detached from the socket 2. Is maintained.
As described above, since a part of the sphere 14 is fitted into the groove 13, the plug 3 can rotate with respect to the socket 2.
The paint flowing from the inflow port 5 to the outflow port 9 is filtered when passing through the filter 10 in the filtration chamber 4 disposed therebetween, and paint residue or the like in the paint adheres to the outer peripheral surface of the filter 10. Removed.
Further, since the filter 10 has the reinforcing member 11 inscribed along the inner peripheral surface thereof, the shape is maintained even when the paint 10 is applied to the filter 10.
[0009]
The cleaning or replacement of the filter 10 and the replacement of the O-ring 12 are performed after stopping a circulation pump or the like provided in the paint unit.
In this operation, first, the plug 3 is detached from the socket 2.
As shown in FIG. 3, the detaching operation is performed by sliding the sleeve 17 toward the inflow port 5 against the urging force of the spring 18 to separate the annular projection 16 from the spherical body 14 so that the annular projection 16 This is achieved by releasing the pressing on the spherical body 14 and pulling out the plug 3 from the socket 2.
While the plug 3 is being pulled out, the sphere 4 fitted in the groove 13 of the insertion portion 8 rolls along the inclined side surface of the groove 13 because the pressing restriction by the annular projection 16 is released as described above. After detaching from the groove 13, the side surface of the insertion portion 8 slides into the tapered hole 20 from the inner peripheral surface 15 of the socket 2, whereby the plug 3 can be pulled out from the socket 2 without any restriction. .
After detaching the plug 3 from the socket 2, compressed air is injected into the filter 10 to remove paint residue or the like adhering to the surface of the filter 10, or replace the filter 10.
At this time, if the O-ring 12 is deteriorated due to the pigment in the paint or other conditions, the O-ring 12 is also replaced.
When the replacement work of the filter 10 and the like is completed, the plug 3 is inserted into the socket 2.
In this case, when the plug 3 is inserted into the socket 2 in a state where the sleeve 17 of the socket 2 is slid to the inflow port 5 side (see FIG. 3) in the same manner as described above, and then the slide holding state of the sleeve 17 is released. Then, the annular projection 16 of the sleeve 17 is returned to the spherical body 14 by the spring 18, and the spherical body 14 is pressed and fitted into the groove 13 of the plug 3 to be locked.
[0010]
【The invention's effect】
In short, the present invention relates to a substantially cylindrical socket 2 having a filtration chamber 4 provided therein, an inlet 5 communicating with the filtration chamber 4 provided at one end, and a quick coupling means 6 with the plug 3 provided at the other end. The other end of the socket 2 is provided with an insertion portion 8 which can be inserted and removed by the quick coupling means 6, and one end of the insertion portion 8 is provided with an outflow port 9 and the other end is inserted into the socket 2 in a state of being inserted into the socket 2. Since the filter 3 is composed of the substantially cylindrical plug 3 in which the filter 10 existing in the filtration chamber 4 is detachably provided, the plug 3 can be quickly attached to and detached from the socket 2, and a tool such as a wrench is not required as in the related art. The filter 10 can be replaced or cleaned.
In addition, since the O-ring 12 is externally fitted to the insertion portion 8, the deterioration state of the O-ring 12 can be grasped at a glance, and compared with a conventional product in which the O-ring is attached to and detached from the inner periphery of the socket. The O-ring 12 can be easily and easily replaced, the normal mounting state of the O-ring 12 can be easily checked, and the working efficiency can be improved.
[0011]
The quick coupling means 6 is provided with a sphere 14 removably fitted in a groove 13 provided around the insertion portion 8 of the plug 3 on the inner and outer peripheral surfaces 15 and 15a at the other end of the socket 2, and the sphere 14 is attached to the other. An annular projection 16 which is pressed from the outer peripheral surface 15a of the end and protrudes from the inner peripheral surface 15 is swelled on the inner peripheral surface 17a. Since the sleeve 17 is urged by the spring 18 so as to be disposed on the upper surface 14, the sleeve 17 is slid and the spherical projection 14 is pressed or released by the annular projection 16, thereby forming the groove of the insertion portion 8 of the plug 3. Since the sphere 14 is fitted into and disengaged from the socket 13 and the socket 2 and the plug 3 can be quickly attached and detached with one touch, and the sleeve 17 is set so that the annular projection 16 presses and holds the sphere 14 by the spring 18. socket When the plug 3 is inserted into the socket 2, the ball 14 is forcibly inserted into the groove 13 of the insertion portion 8, and the locked state in which the plug 3 does not come off from the socket 2 can always be maintained, and the same effect as described above is exerted. In addition, the quick coupling means 6 has a relatively simple structure, does not erroneously remove and attach the socket 2 and the plug 3, and can reduce the weight of the main body 1.
[0012]
The filter 10 is formed in a cylindrical shape so as to protrude from the other end of the plug 3, and the reinforcing member 11 made of a spiral wire is inscribed on the inner peripheral surface of the filter 10. Can maintain its shape without deformation.
In addition, in the conventional reinforcing material having a cylindrical punching plate, the filtered paint intervenes in a gap between the filter and the filter in which the reinforcing material is installed, and this solidifies, and eventually the paint cannot pass normally through the filter. However, according to the present invention, since the reinforcing material 11 is formed of a spiral wire, the filtered paint hardly adheres to and solidifies on the reinforcing material 11, and the conventional problems can be solved.
Therefore, the filter 10 can be made longer to increase its filtration area (corresponding to the surface area of the filter 10) as much as possible, so that the pressure loss generated when the paint passes through the filter 10 can be reduced.
[0013]
Since the main body 1 is made of stainless steel, it does not corrode if water-based paint is used, and because of its material properties, it has high strength. Therefore, the entire main body 1 can be made as thin as possible, and the weight can be reduced. Its practical effect is enormous.
[Brief description of the drawings]
FIG. 1 is a front view of a paint filter.
FIG. 2 is a sectional view of FIG.
FIG. 3 is a half sectional view of the socket with a sleeve slid.
FIG. 4 is a front view of the plug.
[Explanation of symbols]
2 Socket 3 Plug 4 Filtration chamber 5 Inlet 6 Rapid coupling means 8 Insertion part 9 Outlet 10 Filter 11 Reinforcement 12 O-ring 13 Groove 14 Sphere 15 Inner peripheral surface 15a Outer peripheral surface 16 Annular protrusion 17 Sleeve 17a Inner peripheral surface 18 Spring

Claims (4)

A filtration chamber is provided inside, a substantially cylindrical socket provided with an inflow port communicating with the filtration chamber at one end, and a quick coupling means with a plug at the other end, and a quick coupling means at the other end of the socket. Insertable and detachable, and provided with an insertion portion externally fitted with an O-ring, while providing an outlet at one end of the insertion portion, the other end of the filter inside the filtration chamber in the state of being inserted into the socket. A paint filter comprising a detachable and substantially cylindrical plug. The quick coupling means is provided with a sphere that is removably fitted in a groove formed around the insertion portion of the plug so as to be able to protrude and retract from the inner and outer peripheral surfaces of the other end of the socket, and presses the sphere from the outer peripheral surface of the other end to form the inner sphere. A cylindrical sleeve in which an annular protrusion protruding from the peripheral surface is formed separately on the inner peripheral surface is fitted around the other end of the socket, and the sleeve is urged by a spring so that the annular protrusion is arranged on a sphere. The filter for paint according to claim 1, wherein: 3. The filter according to claim 1, wherein the filter is formed in a cylindrical shape so as to protrude from the other end of the plug, and a reinforcing member made of a spiral wire is inscribed on an inner peripheral surface of the filter. Filter for paint. 4. The filter for paint according to claim 1, wherein the filter is made of stainless steel.

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