JP2016124583A - Spray gun adapter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adapter used when a liquid container is mounted on a head portion of a holder of a spray gun which prevents "color mixing" by the action of the adapter when a paint container is replaced and used.SOLUTION: A spray gun adapter includes an adapter body 100 and an attachment/detachment mechanism 200. The adapter body 100 has a container mounting portion 50, a cylindrical portion 60 inserted into a cylindrical head portion 11 of a holder 10, and a connection cylinder portion 62 provided on a partition wall portion 61. The attachment/detachment mechanism 200 has a resin spring portion 70 and an operation piece portion 71, and has an engaging claw portion 72 provided on the operation piece portion 71. The adapter body 100 is mounted on the head portion 11 through the attachment/detachment mechanism 200, and thereby the cylindrical portion 60 is inserted into the head portion 11, and a liquid outlet 63 of the connection cylinder portion 62 is connected to a suction passage connection port 22.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a spray gun adapter, and more particularly to an adapter applied to a spray gun used for spraying paint or a primer.

  FIG. 7 is a partial cross-sectional view showing a main part of a spray gun used when a paint or primer is manually applied to an automobile body, and FIG. 8 is a liquid container (described later) removed. It is the fragmentary sectional view which showed the principal part of the spray gun in the state.

  This spray gun has a holder 10 to which a gas container (not shown) such as a cylinder storing compressed gas is attached. The holder 10 includes a cylindrical head portion 11, and a suction nozzle 20 is provided at the center of the upper wall portion 12 that closes the upper end of the head portion 11. The suction nozzle 20 includes a liquid ejection port 21 that opens outside the head portion 11 and a suction passage connection port 22 disposed in the head portion 11, and the suction nozzle 20 in the holder 10. A gas ejection nozzle 23 is provided at a location opposite to. The compressed gas stored in the gas container is supplied to the gas ejection nozzle 23 through the air supply tube 24. The supply stop control of the gas to the gas ejection nozzle 23 is performed through operation of a push button type actuator (not shown). The spray gun provided with the above structure is also disclosed by the following prior examples (Patent Document 1 and Patent Document 2).

  In this spray gun, when the push button of the actuator is pushed down and gas is supplied from the gas container to the air supply tube 24, an air flow is injected from the gas discharge nozzle 23, and the suction nozzle 20 is generated by the negative pressure action generated by the jet air flow. A suction force is generated in the internal passage. Therefore, as shown in FIG. 7, the suction port 32 connected to the suction passage connection port 22 is attached to the head portion 11 of the liquid container 30 in which the coating material is stored in the head portion 11. The paint sucked up through the suction tube 32 is discharged from the liquid jet port 21 of the suction nozzle 20 and is jetted forward as indicated by the arrow F along with the jet stream. The

  The spray gun described with reference to FIG. 7 or 8 is used with the user holding the gas container mounted on the holder 10 in his / her hand, and is mounted on the head portion 11 during the painting operation. It is often possible that the liquid container 30 is vigorously shaken or in some cases tilted to an inverted posture. Therefore, the paint stored in the liquid container 30 adheres to the inner surface 12 a (see FIG. 8) of the upper wall portion 12 in the head portion 11 through the mouth portion 31 of the liquid container 30 or is disposed inside the head portion 11. It adheres to the outer surface 22a (see FIG. 8) of the suction passage connection port 22 of the suction nozzle 20 that is being used. Furthermore, after the liquid container 30 is removed from the head portion 11, the paint adheres to the inner and outer surfaces of the suction tube 32 or the paint adhering to the mouth portion 31 of the liquid container 30 or the like. It may adhere to the inner surface 11a (see FIG. 8) or the like. The same situation can occur when the liquid container 30 storing the primer is used in the liquid container.

JP 2006-26612 A Utility Model Registration No. 3124417

  In a painting operation using this type of spray gun, the same color painting is not always performed with one spray gun, but two or more types of liquid containers 30 storing different color paints are used for the head portion. In some cases, the painting work is repeatedly performed while changing the material.

  However, when such a repetitive operation is performed, it adheres to the inner and outer surfaces of the suction tube 32, the inner surface 12a of the upper wall portion 12 in the head portion 11, the outer surface 22a of the suction passage connection port 22 and the like by the previous painting operation. During the operation, the paint may be mixed with paints of different colors in the liquid container 30 in use and ejected from the liquid ejection port 21. “Color mixing”. When such “color mixing” occurs, there is a problem that the paint color is different from the color of the paint planned at the beginning of the work. Similar problems occur when a primer (generally white) is applied first, followed by a colored coating.

  Therefore, in order to avoid the “color mixing” as described above, the gas ejection nozzle 23 is mounted before the liquid container 30 to be used next is mounted after the liquid container 30 previously used is removed from the head portion 11. In some cases, a countermeasure may be taken in which gas is sprayed (empty spray) from the liquid jet port 21 to blow off the paint adhering to the inner surface 12a of the upper wall 12 or the outer surface 22a of the suction passage connection port 22 or the like. However, even if this measure is taken, the above-mentioned “color mixing” is not completely avoided.

  On the other hand, for a paint or primer of the same color, a measure of avoiding “color mixing” by using a dedicated holder 10 for the paint or primer can be considered, but this measure has a relatively large size. A number of holders 10 are used, which causes a problem that the coating cost is too high.

  The present invention has been made in view of the above situation, and by providing an adapter used when mounting a liquid container on the head portion of the holder described above, the above-mentioned "color mixing" is caused by the action of the adapter. The purpose is to prevent it.

  In addition, the present invention is a spray gun adapter that can significantly reduce the coating cost compared to the above-described countermeasures for avoiding “color mixing” by using a dedicated holder for paint or primer. The purpose is to provide.

  The spray gun adapter according to the present invention is provided with a suction nozzle that generates a suction force in an internal passage by a negative pressure action generated by a jet airflow in a cylindrical head portion whose upper end is closed. However, it is used for a spray gun provided with a holder comprising a liquid jet opening that opens outside the head part and a suction passage connection port arranged in the head part.

  The spray gun adapter includes a container mounting portion to which a mouth portion of a liquid container is mounted, a cylindrical portion provided in the container mounting portion and inserted into the head portion, the container mounting portion, and the cylindrical portion. A liquid outlet connected to the suction passage connection port provided in the partition wall partitioning the liquid and a suction unit for sucking up the liquid stored in the liquid container connected to the liquid outlet and attached to the container mounting unit An adapter main body having a tube connection port to which a tube is connected, and an attachment / detachment mechanism for attaching / detaching the adapter main body to / from the head portion, via the attachment / detachment mechanism. By attaching the adapter body to the holder, the cylinder part is inserted into the head part, and the liquid outlet of the connection cylinder part is connected to the suction passage connection port. It is configured.

  The spray gun adapter (adapter) configured as described above is attached / detached to / from the head portion of the holder via the attachment / detachment mechanism. And, if the suction tube connected to the tube connection port of the connecting cylinder part is inserted into the liquid (for example, paint) in the liquid container attached to the container mounting part, The coating material is sprayed from the liquid ejection port of the suction nozzle through the suction tube, the internal passage of the connecting tube portion, and the liquid outlet. Therefore, the paint does not adhere to the inner surface of the head portion or the outer surface of the suction passage connection port of the suction nozzle during the painting operation. In addition, since the internal space of the cylinder part is separated from the internal space of the container mounting part by the partition wall part, even if the liquid container is vigorously shaken during the painting operation or falls to the inverted posture, A situation in which the paint in the container enters the internal space of the cylinder and adheres to the inner surface of the head does not occur. Therefore, after the liquid container and the suction tube are attached to the adapter body and removed from the head together with the adapter, another liquid container and another suction tube attached to the new adapter body are connected to the new adapter. The above-mentioned “color mixing” does not occur when the head is attached to the head and the painting work is performed.

  In addition, the adapter can be easily reduced in size compared to the holder, so even if the liquid container is attached to the adapter head while it is attached to the adapter body, the painting cost is very high. Does not happen.

  In the present invention, it is desirable to have a sealing means for blocking the internal space of the cylindrical portion inserted into the head portion from the internal space of the head portion. With this configuration, the paint in the liquid container is further suppressed from adhering to the inner surface of the head portion, the outer surface of the suction passage connection port of the suction nozzle, and the like.

  In the present invention, the sealing means is provided on the cylindrical portion and a contact edge portion that is formed by the upper end edge of the cylindrical portion and contacts the inner surface of the upper wall portion that covers the upper end of the cylindrical head portion. It is possible to employ a configuration in which an annular seal portion that contacts the inner peripheral surface of the head portion is provided. With this configuration, the internal space of the cylinder portion is reliably blocked from the internal space of the head portion by the contact edge portion and the seal portion, and liquid leaks from the internal space of the cylinder portion to the internal space of the head portion. This situation is suppressed, and the above-mentioned “color mixing” is more reliably prevented.

  In the present invention, it is desirable that the partition wall is provided with an air hole that allows communication between the internal space of the cylindrical portion and the internal space of the container mounting portion. When this configuration is adopted, when the adapter main body is attached to the head portion by the attachment / detachment mechanism, air is not confined in the internal space of the tube portion, and the blocking action by the contact edge portion and the seal portion is improved.

  In the present invention, it is desirable to adopt a configuration in which the seal portion is formed of an annular bowl-shaped portion integrally formed with resin together with the cylindrical portion. According to this, compared with the case where a seal part is used as a single component different from the cylindrical part, the manufacturing cost of the adapter is low, which helps to keep the coating cost low.

  In the present invention, the attachment / detachment mechanism includes a pair of plate-like resin spring portions integrally formed with resin together with the container attachment portion and extending to both sides of the container attachment portion, and respective ends of these resin spring portions. And a cylindrical portion inserted into the head portion by being engaged with the upper surface of the head portion, provided at one end portion of the operation piece portion. An engaging claw portion that presses the abutting edge portion against the inner surface of the upper wall portion, an operation portion that is provided at the other end portion of the operation piece portion and opens and closes the one end portion of the operation piece portion, It is possible to employ a configuration comprising: The detachable mechanism with this configuration can open and close one end of the operation piece having the engaging claw while holding the operation part of the pair of operation pieces with a finger. Then, it becomes possible to reliably and quickly perform an operation of attaching or detaching the adapter to or from the head portion. In addition, the engaging claw part of the operation piece part engaged with the upper surface of the head part exerts the action of pressing the contact edge part of the cylinder part against the inner surface of the upper wall part, so that the blocking action by the contact edge part is surely exhibited. It becomes possible to make it.

  In this invention, it is possible to employ | adopt the structure that the internal thread which can screw the external thread provided in the opening part of the said liquid container is formed in the internal peripheral surface of the said container attachment part. According to this, not only can the mouth of the liquid container be securely attached to the container mounting portion, but also the liquid container as shown in FIG. 8, that is, the liquid container having a male screw at the mouth is used as it is. There is an advantage that it can be mounted on the container mounting portion.

It is a schematic perspective view of the state which attached the adapter concerning the embodiment of the present invention to the holder. It is a schematic perspective view of an adapter. It is a vertical front view of an adapter. It is the partial vertical side view which showed the adapter use condition. It is the V section enlarged view of FIG. It is explanatory drawing which showed the effect | action of the operation piece part. It is the fragmentary sectional view which showed the principal part in the use condition of a spray gun. It is the fragmentary sectional view which showed the principal part of the spray gun in the state which removed the liquid container.

  FIG. 1 is a schematic perspective view of an adapter A according to an embodiment of the present invention mounted on a head portion 11 of a holder 10 in a spray gun.

  As shown in FIG. 1, a gas container 300 is detachably mounted on the rear portion of the holder 10, and an actuator push button 13 is disposed above the mounting location. Further, a head portion 11 is provided at the front portion of the holder 10, a suction nozzle 20 is provided on the head portion 11, and a gas ejection nozzle 23 is provided at a location facing the top portion of the suction nozzle 20. The head unit 11 and the suction nozzle 20 have the same configuration as that described with reference to FIG. 7 or FIG.

  2 is a schematic perspective view of the adapter A, and FIG. 3 is a longitudinal front view of the adapter A.

  The adapter A has an adapter main body 100 and an attachment / detachment mechanism 200. The adapter main body 100 has a cylindrical container mounting portion 50 having an internal thread 51 formed on the inner peripheral surface thereof, and a cylindrical portion 60 that extends concentrically from the container mounting portion 50 upward. In addition, the cylindrical portion 60 is partitioned from the container mounting portion 50 by the partition wall portion 61. Moreover, the outer peripheral diameter of the cylindrical part 60 is slightly shorter than the inner peripheral diameter of the cylindrical head part 11 of the holder 10 shown in FIG. 1 and can be inserted into the head part 11. A connecting cylinder 62 is raised at the center of the partition wall 61. The upper end opening of the inner passage of the connecting cylinder 62 is formed as a liquid outlet 63, whereas the lower end of the inner passage is The tube connection port 64 communicates with the liquid outlet 63. The attachment / detachment mechanism 200 includes a pair of resin spring portions 70 and 70 each formed of a plate-like piece extending obliquely downward from both sides of the cylindrical container attachment portion 50, and ends of the resin spring portions 70 and 70. Long operation piece parts 71 and 71 connected to the part. The operation piece portion 71 has an intermediate portion in the longitudinal direction connected to the end portions of the resin spring portions 70, 70, and is provided with engagement claw portions 72, 72 projecting inwardly at one end portion, and the other end portion is a pair. It is set as the operation parts 73 and 73 for opening and closing the engaging claw parts 72 and 72 of these. The adapter main body 100 and the attachment / detachment mechanism 200 having the above configuration are integrally formed of resin.

  4 is a partially longitudinal side view showing the usage state of the adapter 100, FIG. 5 is an enlarged view of a V portion of FIG. 4, and FIG. 6 is an explanatory view showing an operation of the operation piece portion 71.

  When the adapter 100 is attached to the head portion 11, as shown in FIG. 6, the tube portion 60 is inserted inside the cylindrical head portion 11, and the connection tube portion 62 is sucked by the suction nozzle 20 of the head portion 11. The liquid outlet 63 is inserted into the lifting passage connection port 22 and connected to the liquid outlet 21 of the suction nozzle 20, and the engaging claws 72, 72 of the pair of operation pieces 71, 71 are connected to the head portion 11. Engaging the wall 12 from both sides thereof. This mounting operation can be performed by, for example, performing an operation of lifting the adapter 100 in a state where the operation parts 73 and 73 of the pair of operation piece parts 71 and 71 are grasped with a finger. Alternatively, the two engaging claws 72 and 72 can be lifted by sliding the outer surface from the lower end of the head portion 11. In this mounting operation, when the connection cylinder part 62 is inserted into the suction passage connection port 22 of the suction nozzle 20 of the head part 11, the cylinder part 60 is automatically inserted inside the head part 11. When the adapter 100 is attached to the head portion 11 as described above, the upper wall portion 12 of the head portion 11 is elastically clamped by the pair of engaging claws 72, 72 and the cylindrical portion 60, so that the adapter 100 is connected to the head portion. 11 is fixed.

  After the adapter 100 is attached to the head portion 11 as shown in FIG. 6, when the gas is supplied from the gas container 300 to the air supply tube 24 by depressing the push button 13 of the actuator shown in FIG. 1, the gas shown in FIG. An airflow is ejected from the ejection nozzle 23, and a suction force is generated in the internal passage of the suction nozzle 20 by a negative pressure action generated by the ejection airflow. Therefore, as shown in FIG. 4 or 5, the liquid container 30 is attached to the container mounting portion 50 by screwing the male screw 33 of the mouth portion 31 of the liquid container 30 into the female screw 51 of the container mounting portion 50 of the adapter 100, and When the suction tube 35 connected to the tube connection port 64 of the connection cylinder portion 62 in the adapter 100 is inserted into the paint of the liquid container 30, the paint sucked through the suction tube 35 is absorbed by the suction nozzle 20. It is discharged from the liquid jet 21 and is jetted forward as indicated by the arrow F in FIG.

  In the case where the painting operation is performed as described above, during the painting operation, the paint in the liquid container 30 passes through the suction tube 35, the internal passage of the connecting tube portion 62, and the liquid outlet 63, and the liquid in the suction nozzle 20 is liquid. It is ejected from the ejection port 21. Therefore, the paint does not adhere to the inner surface of the head portion 11 or the outer surface of the suction passage connection port 22 in the suction nozzle 20 during the painting operation. Moreover, since the internal space of the cylinder part 60 is partitioned from the internal space of the container mounting part 50 by the partition part 61, it is assumed that the liquid container 30 is vigorously shaken or falls to an inverted posture during the painting operation. However, a situation in which the coating material in the liquid container enters the internal space of the cylinder portion 60 and adheres to the inner surface of the head portion 11 and the inner surface of the upper wall portion 12 does not occur. Therefore, while the liquid container 30 and the suction tube 35 are attached to the adapter body 100, they are removed from the head portion 11 together with the adapter A, and then another liquid container 30 attached to the new adapter body 100 and another When the suction tube 35 is attached to the head portion 11 via the new adapter A and the painting operation is performed, the “color mixing” as described at the beginning will not occur.

  Next, the adapter A according to the embodiment includes a sealing unit 80 that blocks the internal space of the cylindrical portion 60 inserted into the head portion 11 from the internal space of the head portion 11. In the adapter A of the embodiment, the sealing means 80 includes a contact edge portion 81 formed by the upper end edge of the tube portion 60 and a seal portion formed of an annular bowl-shaped portion integrally formed with resin together with the tube portion 60. 82. As shown in FIGS. 4 to 6, the contact edge portion 81 abuts against the inner surface of the upper wall portion 12 of the head portion 11 in an elastic state, and the seal portion 82 abuts against the inner peripheral surface of the cylindrical head portion 11. .

  If the sealing means 80 is provided in this way, the paint in the liquid container 30 is surely prevented from entering the internal space of the cylindrical portion 60, so that the suction passage in the inner surface of the head portion 11 and the suction nozzle 20 is provided. The situation of adhering to the outer surface of the connection port 22 does not occur, and the above “color mixing” is more reliably prevented. Further, since the seal portion 82 is fitted inside the head portion 11 in a close contact state, the sealing degree is improved and the action of preventing the “color mixing” is improved. 11 is restrained from swinging forward, backward, left and right of the container mounting portion 50 in the state of being attached to the container 11, and thus there is an advantage that the handling property of the spray gun is improved during the painting operation. Furthermore, the manufacturing cost of the adapter is lower than when the seal portion 82 is a single component (for example, an O-ring) different from the cylindrical portion 60, which helps to keep the coating cost low.

  When the cylindrical portion 60 is provided with the sealing means 80 as in this embodiment, the internal space of the cylindrical portion 60 and the internal space of the container mounting portion 50 are provided in the partition wall portion 61 as shown in FIG. 3 or FIGS. It is desirable to form air holes 65 that communicate with each other. In this way, when the adapter main body 100 is attached to the head portion 11 by the attachment / detachment mechanism 200, air is not confined in the internal space of the cylindrical portion 60, and the contact edge portion 81 constituting the sealing means 80 or the like There is an advantage that the blocking action by the seal portion 82 is improved.

  In this embodiment, the adapter 100 is configured to be attached to the head unit 11 simply by inserting the cylindrical unit 60 into the cylindrical head unit 11. It is also possible to configure the adapter 100 to be attached to the head portion 11 by providing a male screw on the outer peripheral surface and screwing the male screw with a female screw provided on the inner peripheral surface of the head portion 11. In addition, the internal thread for screwing together the external thread with which the opening part 31 of the liquid container 30 shown in FIG. 7 is screwed can be diverted to the said internal thread. If this configuration is adopted, the resin spring portion 70 and the operation piece portion 71 of the adapter 100 shown in FIG. 2 can be omitted.

A Spray gun adapter (adapter)
DESCRIPTION OF SYMBOLS 10 Holder 11 Head part 20 Suction nozzle 21 Liquid jet outlet 22 Suction passage connection port 30 Liquid container 31 Port part of liquid container 33 Male screw 50 Container attachment part 51 Female screw 60 Cylinder part 61 Bulkhead part 62 Connection cylinder part 63 Liquid outlet 64 Tube connection port 65 Air hole 80 Sealing means 81 Contact edge portion 82 Seal portion 70 Resin spring portion 71 Operation piece portion 72 Engaging claw portion 73 Operation portion 100 Adapter body 200 Detachment mechanism

Claims (7)

A sucking nozzle that generates a suction force in the internal passage by a negative pressure action generated by the jet airflow is provided in the cylindrical head portion whose upper end is blocked, and the sucking nozzle is opened outside the head portion. A spray gun adapter for use in a spray gun comprising a holder having a liquid jet port and a suction passage connection port arranged in the head part,
A container mounting portion to which a mouth portion of the liquid container is mounted; a cylinder portion provided in the container mounting portion and inserted into the head portion; and a partition wall portion partitioning the container mounting portion and the cylinder portion. A liquid outlet connected to the suction passage connection port and a tube connection port to which a suction tube connected to the liquid outlet and sucked up in the liquid container attached to the container mounting portion is connected An adapter body comprising: a connecting tube portion comprising:
An attachment / detachment mechanism for attaching / detaching the adapter body to / from the head portion,
By mounting the adapter body on the holder via the attachment / detachment mechanism, the cylindrical portion is inserted into the head portion, and the liquid outlet of the connecting cylindrical portion is connected to the suction passage connection port. Spray gun adapter characterized by being.   2. The spray gun adapter according to claim 1, further comprising a sealing means for blocking an internal space of the cylindrical portion inserted into the head portion from an internal space of the head portion.   The sealing means is formed by the upper end edge of the cylindrical portion, and a contact edge portion that comes into contact with the inner surface of the upper wall portion that closes the upper end of the cylindrical head portion; and the head portion provided on the cylindrical portion. The spray gun adapter according to claim 2, further comprising an annular seal portion that contacts the inner peripheral surface of the spray gun.   The spray gun holder according to claim 2 or 3, wherein the partition wall is provided with an air hole that allows communication between the internal space of the cylindrical portion and the internal space of the container mounting portion.   The spray gun holder according to any one of claims 3 and 4, wherein the seal portion is an annular hook-shaped portion integrally formed with a resin together with the cylindrical portion.   The attachment / detachment mechanism is integrally formed with resin together with the container attachment portion, and a pair of plate-like resin spring portions extending to both sides of the container attachment portion, and longitudinal directions at respective ends of these resin spring portions The operation piece portion provided with an intermediate portion, and one end portion of these operation piece portions, and by engaging with the upper surface of the head portion, the contact edge of the cylindrical portion inserted into the head portion An engagement claw portion that presses a portion against the inner surface of the upper wall portion, and an operation portion that is provided at the other end portion of the operation piece portion and opens and closes the one end portion of the operation piece portion. The spray gun adapter according to any one of claims 3 to 5.   The spray gun adapter according to any one of claims 1 to 6, wherein a female screw capable of screwing a male screw provided in a mouth portion of the liquid container is formed on an inner peripheral surface of the container mounting portion.

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