JPS5920371Y2 - Manual spray gun trigger structure - Google Patents

Description

[Detailed description of the invention] By providing a projecting piece on the spray gun body and providing a locking pin on the trigger that can be engaged and detached from the locking hole of the projecting piece, the trigger can be easily activated in a manual spray gun. This invention relates to a trigger structure for a manual spray gun that can be fixed in the operating state of the spray gun and improve its operability.

When painting, applying adhesive, etc. using a manual spray gun, for example, when spraying continuously, you must continue to operate the trigger with your finger against the spring force acting on the trigger. Furthermore, in a spray gun that uses high-pressure fluid on and off, the spring force of the trigger increases, which in particular causes worker fatigue, which is unfavorable from a safety and hygiene perspective.

In order to solve this problem, a trigger fixing device disclosed in Japanese Utility Model Publication No. 51-12459, for example, has been proposed as a device for holding the trigger in its pulled state, but this device is installed outside the trigger. The structure is such that the protrusion at the tip of the leaf spring can be connected to and removed from the spray gun body, and as the leaf spring is exposed to the outside, it is easy to deform due to collision with external objects during use. It tends to be difficult to secure the trigger.

The present invention aims to provide a trigger structure for a spray gun that can solve these problems, and one embodiment thereof will be described below with reference to the drawings.

In the figure, the structure of the present invention includes a protrusion 2 attached to one side of the spray gun body 1, and a cylinder 4 horizontally installed on the trigger 3.
A locking pin 5 is provided.

The spray gun body 1 has a grip part 10 hanging from the rear end of a body part 9 which has paint and air ejection lowers at the front end of an air cap 6, and has a pattern opening adjustment screw 11 and a paint discharge amount adjustment screw at its upper end. In addition to the screw 12, an air nipple 13 and an air amount adjusting device 14 are provided at the lower end.

The trigger 3 is a bent sheet metal body which sandwiches and pivots the body 9 between upper opposing side pieces 19 and 19, and has a finger rest 20 with a U-shaped cross section at the bottom. , the trigger 3 can operate the needle valve 15 that can open and close the paint jetting lower, and the valve rod 16 of the air valve that opens and closes the compressed air. It is pushed forward by the spring force.

The projecting piece 2 has a locking hole 22 at its tip, and the locking hole 22
is screwed to the upper end and side surface of the grip part 10 of the spray gun body 1 so that it is aligned with the side piece 19 when the trigger 3 is pulled, and the protruding piece 2 is bent slightly inward to align with the side piece 19. Insert it into the inner surface of 19.

The cylindrical body 4 has the side pieces 19 as shown in FIGS.
．． It is formed to be shorter than the 19-inch dimension by the insertion of the protruding piece 2, and is provided with a step 23 on the front edge of the outer periphery, and a small (
An inner hole 26 is provided in L24 via a step 25, or the inner hole 26 is
An internal thread 27 is engraved therein.

The cylindrical body 4 has the stepped portion 23 fitted into a through hole 29 formed in the middle of the side piece 19 of the trigger 3 so as to be aligned with the locking hole 22 when the trigger 3 is pulled. The side piece 19 is fixed by being clamped by a screw member 31 extending through the hole 30.

The locking pin 5 passes through the small hole 24,30 in the cylinder 4.

The locking pin 5 has a push button 33 screwed onto its tip, and is locked to the inner end of the screw member 31 by a retaining ring 34 fitted therein. The push button 3 is pressed by the spring 35 installed.
3 protrudes outward from the side piece 19 and on the opposite side from the protruding piece 2.

Note that when the push button 33 is in the protruding state, the outer end of the locking pin 5 and the tip of the locking pin 5 substantially coincide with the outer end of the cylindrical body 4.

However, in the structure of the present invention, the locking pin 5 normally protrudes in the opposite direction to the projecting piece 2, so that the trigger 3 can be freely operated to turn on and off the spray of paint, while the trigger 3 cannot be pulled. When the push button 33 is pressed with a finger, the tip of the locking pin 5 protrudes from the cylindrical body 4 and can be fitted into the locking hole 22 of the protrusion 4, and in this state, by loosening the trigger 3, The spring force acting on the trigger 3 causes a frictional force to act between the locking pin 5 and the inner surface of the locking hole 22, and this frictional force overcomes the restoring force of the spring 35, thereby bringing the trigger 3 into its pulled state. Hold and vine.

Therefore, it is possible to perform continuous spraying with a spray gun without touching the trigger.

Next, when the trigger 3 is pulled, the locking pin 5 and the locking hole 22
When the frictional force between them disappears, the locking pin 5 is returned to its original position by the spring 35, and the trigger 3 can be operated freely again.

As shown above, the structure of the present invention is to provide a protrusion on one side of the spray gun body with a locking hole in a position that can be aligned with the trigger when the trigger is pulled, and a tube attached to the trigger. Since a locking pin that can be locked into and removed from the locking hole is normally attached to the body with a push button protruding from the other side by a spring, the trigger of the spray gun can be easily held in a pulled state by operating the push button. Continuous spraying is possible without the need for a finger knife, and the locking pin can be automatically returned by trigger operation, which greatly improves the operability of the spray gun and reduces the operator's burden. can reduce fatigue.

Furthermore, the structure of the present invention is configured such that the locking pin can be moved back and forth using the cylindrical body as a trigger and a spring provided inside the cylindrical body, so that it is not possible to move the locking pin forward or backward, for example, as in the device disclosed in Japanese Utility Model Publication No. 54-12459. It is possible to effectively prevent damage to the leaf spring caused by exposure to the outside, and to provide a trigger structure for a spray gun that is excellent in handling and safety.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a rear view thereof, Fig. 3 is an exploded perspective view illustrating a cylinder and a locking pin, Fig. 4 is a sectional view of main parts, FIG. 5 is a partial sectional view showing the effect. 1...Spray gun, 2...Protrusion piece, 3
...Trigger, 4...Cylinder, 5...
- Locking pin, 22... Locking hole, 33...
・Push button, 35... Spring.

Claims (1)

[Scope of utility model registration request] A projecting piece with a locking hole at the tip is provided on one side of the spray gun body, with the locking hole positioned at the trigger pulling position, and a cylinder with a spring netted inside is placed on the trigger side. installed and on the cylindrical body,
A manual type, characterized in that a locking pin is attached which is biased by the spring to protrude in the direction of the other side of the spray gun body, and which can be pushed down to penetrate the cylinder and engage with the locking hole. Spray gun trigger structure.