JP2009082866A - Coating supply syringe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating supply syringe improved in the efficiency of cleaning work or the like by facilitating the detachment of a piston. <P>SOLUTION: The coating supply syringe includes a syringe main body 2 having a discharge flow channel 403 provided to its leading end and the piston 5 inserted in the syringe main body 2 in a freely movable manner and having a flow channel 9, that supplies coating into the syringe main body 2, formed thereto. The piston 5 includes the piston head 6 inserted in the syringe main body 2, the piston rod 7 connected to the piston head 6 and the piston base 8 fixed to a piston drive mechanism, to which the piston rod 7 is connected in a freely detachable manner, and having a coating hose connected thereto. The flow channel 9 is reduced in the diameter of its part 903 positioned at the rear end part of the piston rod 7, has the pin member 10 traversing the flow channel 9 in the vicinity of its leading end part and is internally provided with a spherical body 11 freely moving through the flow channel 9 and capable of closing the part 903 reduced in diameter. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a paint supply syringe, and more particularly, to a paint supply syringe that can achieve improvement in working efficiency in cleaning by facilitating removal of a piston.

  Conventionally, when coating various products, etc., a syringe is used as a method of supplying paint to a spray gun for injecting paint toward an object to be coated. There is a type in which a flow path is formed in the piston, and the paint is supplied into the syringe through the flow path.

  Here, FIG. 3 is a figure for demonstrating the conventional syringe mentioned above, and 31 is a syringe in the figure. The syringe 31 has a syringe body 32 and a piston 33 that is movably inserted into the syringe body 32. The syringe body 32 has a substantially cylindrical shape with the tip closed, A joint 3201 to which the other end of the paint hose to which the spray gun is connected is connected is formed, and the inside of the joint 3201 and the syringe body 32 is communicated with the syringe-side flow path 3202.

  On the other hand, the piston 33 includes a piston head 3301 having a diameter slidable on the inner wall of the syringe 32 and a piston rod 3302 provided continuously to the piston head 3301.

  The piston head 3301 and the piston rod 3302 each have a piston-side flow path 3303 communicating with each other. The flow path formed in the piston head 3301 passes through the piston head 3301, and the piston rod 3302 The flow path formed at the front end is opened at the front end of the piston rod 3302 and communicates with the flow path formed at the piston head 3301, and the other end passes through the side wall of the rear portion of the piston rod 3302. The tip of a paint hose (not shown) whose end is disposed in the paint tank is connectable.

  In use, the movable plate 34 is connected in the vicinity of the rear end portion of the piston rod 3303, and the screw screw 35 connected to the rotating shaft of the motor 36 is screwed to the movable plate 34 while moving to the movable plate 34. 34, whereby the motor 36 is rotated forward or reverse, whereby the movable plate 34 is raised or lowered along the screw screw 35 as the screw screw 35 rotates, and the piston 33 is moved along the syringe 32 accordingly. I am going to move inside.

The paint in the syringe 32 can be supplied to the spray gun by raising the piston 33 by the above-described mechanism in a state where the paint is filled in the syringe 32 through the flow path 3303 formed in the piston 33. In addition, the paint can be circulated through the flow path of the piston 33.
JP 2004-68773 A JP 2002-159907 A

  Thus, since the conventional syringe 31 described above is configured to supply the paint into the syringe body 32 through the flow path 3303 formed in the piston 33, the piston is supplied when the paint is supplied into the syringe body 32. On the other hand, since it is not necessary to remove the piston 33, the hose is connected to the piston 33. For example, when removing the piston 33 for cleaning the inside of the syringe body 32, the hose becomes an obstacle and the removal work is troublesome. The problem can be pointed out.

  Then, this invention makes it a subject to provide the syringe for paint supply which made it possible to improve efficiency, such as a cleaning operation, by making removal of a piston easy.

The syringe for supplying paint according to the present invention includes a syringe body having a discharge channel formed at the tip, and a channel for supplying paint to the inside of the syringe, which is movably inserted into the syringe body. A piston for supplying paint, comprising:
The piston is fixed to a piston drive mechanism in which a piston head inserted into the syringe, a piston rod connected to the piston head, and the piston rod are detachably connected, and a paint hose is connected. A piston base, and
The flow path has a pin member that traverses the flow path in the vicinity of the front end portion while reducing the diameter of the portion located at the rear end of the piston rod, and is further movable inside the flow path and the It is characterized in that a sphere capable of closing a portion having a reduced diameter in the flow path is incorporated.

  In the paint supply syringe of the present invention, a syringe body having a discharge channel formed at the tip, and a flow path for movably inserted into the syringe body and supplying the paint to the inside of the syringe In a paint supply syringe comprising a piston formed with a piston, a piston, a piston head inserted into the syringe, a piston rod connected to the piston head, and a piston to which the piston rod is detachably connected The piston base is fixed to the piston drive mechanism and the paint hose is connected to the base.

  Thus, in the paint supply syringe of the present invention, the piston base to which the paint hose is connected is fixed to the piston drive mechanism, and the piston rod can be attached to and detached from the piston base. It is possible to remove the piston head and the piston rod without any problem. For example, when removing the piston for cleaning the inside of the syringe, the removing operation is easy.

  And at this time, while reducing the diameter of the flow path at the rear end portion of the piston rod, it has a pin member that crosses the flow path in the vicinity of the front end of the flow path, and is further movable inside the flow path. In addition, since the sphere that can close the diameter-reduced portion of the piston is built in, the sphere has a valve function of the rear end portion of the flow path formed in the piston rod, and the piston rod is removed. In addition, it is possible to prevent the paint in the flow path from leaking out of the piston rod.

  The syringe for supplying paint according to the present invention has a syringe body and a piston that is movably inserted into the syringe body, and the syringe body is a discharge flow for discharging paint to the tip. A path is formed, and a flow path for supplying paint to the inside of the syringe is formed inside the piston.

  The piston is movably inserted into the syringe and slides on the inner wall of the syringe, a piston rod connected to the piston head, and a piston to which the piston rod is detachably connected. The piston base is fixed to a drive mechanism for moving the piston.

  Further, the flow path formed in the piston has a diameter of a portion located at the rear end portion of the piston rod smaller than other portions, and has a pin member that crosses the flow path in the vicinity of the tip portion. In addition, a spherical body that can move within the flow path and can close the portion with the reduced diameter is built in the flow path.

  Here, the front end of the flow path is opened on the side wall side of the piston head, and the diameter of the portion of the piston head in which the opening is formed may be smaller than the inner wall of the syringe body. It is possible to effectively prevent pearls and the like from staying in the syringe.

  Further, a clamp is provided around the outer periphery of the piston rod so as to be movable, and the clamp is connected to the piston base, so that the piston rod can be connected to the piston base, thereby connecting the piston rod and the piston base. Becomes easy.

  An embodiment of the paint supply syringe of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the structure of the paint supply syringe of this embodiment, and FIG. 2 is a paint supply of this embodiment. FIG. In the figure, reference numeral 1 denotes a paint supply syringe of this embodiment.

  Further, in the figure, reference numeral 21 denotes a part of the piston drive mechanism. In this embodiment, the piston drive mechanism includes a movable plate, a screw screw penetrating the movable plate, as in the case of the above-described conventional syringe, It has a motor to which this screw screw is connected. In the figure, reference numeral 21 denotes a movable plate portion. The paint supply syringe of this embodiment is connected to the movable plate 21 and is operated by driving a piston drive mechanism to discharge paint.

  And the paint supply syringe 1 of the present embodiment has a syringe body, that is, 2 in the figure is a syringe body, and in this embodiment, the syringe body 2 includes a body portion 3 having a substantially cylindrical shape, It is comprised with the syringe head 4 which closed the front-end | tip part of this main-body part 3. As shown in FIG.

  The main body 3 has a two-layer structure constituted by the outer peripheral wall 301 and the inner peripheral wall 302, and the tip of the inner peripheral wall 302 is slightly retracted from the tip of the outer peripheral wall 301.

  Further, the syringe head 4 has a base end side 401 screwed into the inner periphery of the outer peripheral wall 301 and a front end side 402 having a diameter smaller than that of the base end side, and is along the central axis. A discharge channel 403 for discharging the paint filled in the syringe 2 is formed so as to penetrate the syringe head 4. In the figure, reference numeral 404 denotes a joint portion to which the other end of the paint hose whose one end is connected to the spray gun is connected. In the figure, reference numeral 13 denotes a sealing O-ring.

  Next, 5 is a piston in the figure. That is, the paint supply syringe 1 of this embodiment has a piston 5. In the present embodiment, the piston 5 includes a piston head 6 inserted into the syringe body 2 and a piston rod 7 connected to the rear end side of the piston head 6. The piston rod 7 is detachably connected to the piston base 8 fixed to the movable plate 21 in the piston drive mechanism.

  The piston head 6 has a circular outer diameter that is slidable on the inner wall of the syringe body 2, and a sealing O-ring 13 is provided around the side wall of the sliding portion. 7 is a round bar having an outer diameter smaller than the outer diameter of the piston head 6.

  A flow path 9 is formed in the piston 5 along the axial direction. The flow path 9 is composed of a main flow path 901 and a branch portion 902 communicating with the main flow path 901. The main flow path 901 passes through the piston rod 7 and the piston base 8 to be opened at the rear end surface of the piston 5, and the front end side extends to the vicinity of the front end portion of the piston head 6. On the other hand, the branch portions 902 are formed substantially radially from the central portion of the piston head 6 toward the side wall in the vicinity of the tip portion of the piston head 6. That is, the leading end portion of the main channel 901 is radially branched in the direction of the side wall of the piston head 6 to form a branch portion 902, and the leading end of the branch portion 902 is opened on the side wall side of the piston head 6. The diameter of the opening part of the branch part in the head 6 is made smaller than the inner wall of the syringe body 2, thereby enabling the coating material to be supplied from the side wall of the piston head 6, and particularly included in the coating material between the inner wall of the syringe body and the piston. It is effectively prevented that the metallic, pearl, etc. that are accumulated are retained.

  The main flow path 901 has a smaller diameter at the rear end portion 903 of the piston rod 7 than the other portions, and the flow path 901 in the piston base 8 has a diameter of the rear end portion 903 of the piston rod 7. Is maintained. The rear end portion of the piston base 8 is slightly recessed, and the recessed portion is used as a joint portion 801 communicating with the main flow path 901, and a paint hose is connected to the joint portion 801. .

  Further, a pin 10 is disposed in the form of crossing the main flow path 901 in the vicinity of the front end portion inside the main flow path 901, and the main flow is between the pin 10 and the rear end portion 903 of the piston rod 6. A stainless steel sphere 11 having a diameter capable of closing the rear end portion 903 having a reduced diameter is inserted in the path 901, and a rear end portion having a reduced diameter is inserted into the sphere 11 A function as a valve for closing 903 is provided.

  Next, on the outer peripheral side of the piston rod 7, a clamp 12 having a substantially inverted U-shaped longitudinal section is provided so as to be movable in the longitudinal direction of the piston rod 7. On the other hand, the piston rod 7 is formed with a stopper 701 by increasing the outer diameter in the vicinity of the rear end portion, thereby preventing the clamp 12 from coming out of the piston rod 7.

  In addition, the diameter of the piston rod 7 from the stopper portion 701 to the rear end surface is tapered to reduce the diameter to form an insertion portion 702, while the insertion portion 702 is located at a portion of the piston base facing the piston rod 7. A concave portion 802 having a tapered diameter is formed so that insertion is possible, and the insertion portion 702 is inserted into the concave portion 802.

  Further, the inner periphery of the rear end side of the clamp 12 and the outer periphery of the front end side of the piston base 8 are threaded, whereby the clamp 12 can be screwed to the outer periphery of the front end side of the piston base 8. In a state where the insertion portion 702 is inserted in close contact with the recess 802, the piston rod 7 is connected to the piston base 8 by screwing the inner periphery on the rear end side of the clamp 12 to the outer periphery on the front end side of the piston base 8. On the other hand, by releasing the screwing, the connection between the piston rod 7 and the piston base 8 can be released, and the piston rod 7 is detachably connected to the piston base 8.

  In the paint supply syringe 1 of the present embodiment configured as described above, the paint hose is connected to the joint 801 of the piston base 8 and the terminal portion of the paint hose is located in the paint tank. When a pump or the like interposed in the middle portion of the paint hose is driven and the paint in the paint tank is supplied into the piston 5, the paint supplied in the flow path 9 pushes up the sphere 11 while moving the main flow path. When the supply of the paint is stopped from the side wall of the piston head 6 through the branch portion 902 while the inside of the 901 is raised, the sphere 11 reaches the portion 903 having a reduced diameter in the flow path 9. The portion 903 that falls and has a reduced diameter is closed to prevent backflow of the paint. Then, when the piston drive mechanism is driven and the movable plate 21 is moved to the syringe body side in a state where the syringe body 2 is filled with the paint, the piston head 6 moves to the tip side in the syringe body 2, thereby The paint in the syringe body 2 can be discharged from the syringe through the discharge channel 403.

  Similarly, when the paint is circulated as disclosed in Japanese Patent Application Laid-Open No. 2002-159907, the paint in the paint tank is moved into the piston 5 by driving a pump or the like interposed in the middle part of the paint hose. When supplied, the paint supplied into the flow path 9 is supplied into the syringe body 2 from the side wall of the piston head 6 via the branch part 902 while moving up in the main flow path 901 while pushing up the sphere 11. The paint supplied into the main body 2 is discharged through the discharge passage 403, and the discharged paint is returned to the paint tank through the paint hose and spray gun, and is supplied again into the piston 5 and circulated. I will do it.

  Next, the operation of the paint supply syringe 1 of the present embodiment configured as described above will be described. When the piston head 6 is removed from the paint supply syringe 1 of the present embodiment, the clamp 12 and the piston base 8 are removed. And the clamp 12 is freed, and the piston rod 7 is freed with respect to the piston base 8. Then, in the paint supply syringe 1 of this embodiment, since the paint hose is connected to the piston base 8, the paint hose does not get in the way when the piston rod 7 is extracted from the syringe body 2. The piston head 6 and the piston rod 7 can be easily removed when the syringe is cleaned.

  In addition, a sphere 11 is built in which the diameter of the flow path 903 at the rear end portion of the piston rod 7 is reduced, the inside of the flow path can be moved, and the diameter-reduced portion of the piston can be closed. Is provided with a function as a valve for closing the rear end portion 903 with the reduced diameter, so that the paint in the flow path 9 is prevented from leaking from the piston rod 7 when the piston rod 7 is removed. be able to.

  As described above, in the paint supply syringe 1 of this embodiment, the piston 5 can be extracted from the syringe body without being obstructed by the paint hose, so that the efficiency of the cleaning operation and the like is improved, and at that time, the piston is removed from the piston. It is also possible to prevent paint leakage.

  The present invention makes it easy to remove the piston from the syringe body and to prevent paint leakage at that time, and therefore can be applied to all paint supply syringes that can take out the piston.

It is sectional drawing which shows the structure of the Example of the syringe for paint supply of this invention. It is the figure which decomposed | disassembled and showed the Example of the syringe for paint supply of this invention. It is a figure for demonstrating the conventional syringe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Syringe 2 Syringe main body 3 Main-body part 301 Outer peripheral wall 302 Inner peripheral wall 4 Syringe head 401 Connection part 402 Front end side 403 Discharge flow path 404 Joint part 5 Piston 6 Piston head 7 Piston rod 701 Stopper part 702 Insertion part 8 Piston base 801 Joint Part 802 Concave part 9 Channel 901 Main channel 902 Branch part 903 Part with reduced diameter 10 Pin 11 Spherical body 12 Clamp 13 O-ring

Claims (3)

A syringe body (2) having a discharge channel (403) formed at the distal end portion, and a paint is supplied to the inside of the syringe body (2) movably inserted in the syringe body (2). A paint supply syringe comprising a piston (5) in which a flow path (9) is formed,
The piston (5) includes a piston head (6) inserted into the syringe body (2), a piston rod (7) connected to the piston head (6), and the piston rod (7). A detachably connected piston base (8) fixed to the piston drive mechanism and connected to the paint hose;
The flow path (9) has a pin member (10) that crosses the flow path (9) in the vicinity of the tip while reducing the diameter of the portion (903) located at the rear end of the piston rod (7). And a sphere (11) capable of moving inside the flow path (9) and capable of closing a portion (903) having a reduced diameter in the flow path (9). Supply syringe.   The front end of the flow path (9) is opened on the side wall side of the piston head (6) and the diameter of the portion of the piston head (6) where the opening is formed is smaller than the inner wall of the syringe body (2). The paint supply syringe according to claim 1, wherein the paint supply syringe is provided.   The piston rod (7) is connected to the piston base (8) by connecting to the piston base (8) a clamp (12) movably provided on the outer periphery of the piston rod (7). The syringe for paint supply according to claim 1 or 2.

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