JPH08266956A - Hand spray gun having ultra-lightweight structure - Google Patents

Abstract

PURPOSE: To obtain a hand spray gun reducing the fatigue of the hand, wrist and arm of a worker. CONSTITUTION: A hand air spray gun is constituted by providing a grip part 2 and a body part 3 to a gun main body 1 and integrally forming an atomizing head part 4 to the body part and providing a trigger 5 allowing a needle valve to advance and retreat to the gun main body 1 in a protruding state. The grip part 2 is integrally formed to the gun main body 1 so that the center axis Z of the grip part 2 becomes an attaching angle of 30-60 deg. with respect to the direction Y vertical to the center axis X of the needle in the gun main body 1 and the center B of gravity of the gun is allowed to approach the position of the center A of the grip part 2. A finger hooking piece 8 supporting the wt. of the leading end of the gun by a forefinger is formed to the underside of the body part 3 and a pattern adjusting knob 9 capable of being operated by the thumb is attached to the side surface of the body part 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-air spray gun having an ultra-light weight structure that prevents workers from getting tired.

[0002]

2. Description of the Related Art A hand air spray gun, which an operator holds in his hand and paints, has a grip portion and a body portion having an atomizing head at the tip formed integrally with the gun body from the beginning of its development. The gun body is provided with a trigger for advancing and retracting the needle valve, and the paint is supplied to the inside of the gun body with a paint cup installed above or a paint container installed below the gun barrel, and for spraying. Air is supplied from the lower end of the gun grip into the gun body by an air hose and sprayed from the atomizing head at the tip. In the spraying work, as shown in Fig. 5, the operator usually supports the gun body with the index finger, hits the center of the hand with the gun grip and grasps, and pulls the trigger with the middle finger and the ring finger. Fold the wrist upwards like a pistol and paint.

[0003]

However, the hand air spray gun (hereinafter referred to as the hand gun) has the following problems due to its structure. That is, FIG. 5 shows a typical form of a conventional handgun. The center A of the grip portion and the center of gravity B of the gun are at the positions shown in the figure. In other words, the distance L'from the center A of the grip portion to the center of gravity B of the gun is long, and the force receiving is as shown by the arrows F'1, F'2 and F'3 in the figure. Rotating moment force is higher than heavy-duty handguns (type with paint cup attached on top of gun body) or suction type handguns (type with paint container attached below gun body) with heavy tip. Large and unstable. Further, since the strength of the needle valve spring loaded in the gun body is required, the force of pulling the trigger with a finger is large.

Therefore, in a continuous painting operation, the force applied to the hand, wrist and arm of the operator is large, which is a factor of increasing fatigue. Also, since the trigger is pulled by the finger and sprayed, the weight of the gun itself increases due to the fatigue of the finger and the length of the grip itself required for gripping. There is a lot of fatigue, and the fact is that there are problems in terms of health management.

In other words, to summarize the above-mentioned problems in the structure of the conventional hand gun, since the center of gravity of the gun and the center of the grip portion are far from each other, the weight of the gun itself and the paint container and paint cup are attached to the tip of the gun. In the case of a heavy handgun, it is found that since a moment is present, the force exerted on the operator's hand, wrist, and arm is large, and fatigue is likely to occur. In other words, when the attachment angle of the grip of the conventional handgun is measured, it is about 15 ° to 30 °.
The reason is that the mounting angle is not a natural angle that matches the hand (see FIG. 4).

According to an ergonomic point of view, when a human hand holds a light tree and naturally extends his arms forward, the angle of the tree is within 30 ° to 60 ° from the vertical direction. If this is replaced with a hand gun, the force applied to the hand, wrist, and arm is considered to be small when the jet flow direction of the gun is substantially parallel to the arm axis. The angle is about 30 to 60 degrees with respect to the vertical direction of the central axis of the needle.

In general, it is known that the force exerted on the hand, wrist and arm is reduced when the center of gravity of the gun itself is close to the center of the hand. Therefore, by eliminating the moment that causes the instability, It proposes focusing on solving the structural problem of the conventional handgun.

[0008]

SUMMARY OF THE INVENTION The present invention provides a hand body in which a gun body is integrally formed with a grip portion, a body portion, and an atomizing head at the tip of the body portion, and a trigger for advancing and retracting a needle valve is provided. A spray gun, in which the central axis of the grip part is integrally formed at a mounting angle of 30 to 60 degrees with respect to the vertical direction of the central axis of the needle in the gun main body, and the center of gravity of the gun and the central position of the grip part are brought close to each other. In addition, a finger hanging piece that supports the weight of the tip of the gun with the index finger is formed on the lower side of the gun body.
A pattern adjustment knob that can be operated with the thumb while holding the gun is attached to the side or upper part of the body.

[0009]

The present invention is configured as described above, and the angle from the vertical direction of the central axis of the needle of the gun body to the central axis of the grip portion is set to 30 to 60 degrees, so that work can be performed from an ergonomic standpoint. The force on the person's hand, wrist and arm is minimal. The distance between the center of gravity of the handgun of the present invention and the center of the grip portion is about 2/3 shorter than that in the conventional handgun, and the weight of the tip of the gun is directly transferred to the hand by placing it on the index finger. From the distribution of the force received in the vicinity of the grip portion of the conventional handgun as shown in FIG. 4, to the distribution of the force received over the entire handgun as shown in FIG.
Since the moment that becomes an instability factor disappears, it is the most labor-saving, and the operation of the trigger reduces the force applied to the trigger by using the weight of the hand gun, which reduces the burden on the finger. The handgun of the invention reduces the force exerted on the operator's hand, wrist and arm, suppresses fatigue, and has good operability.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will now be described with reference to the drawings. FIGS. 1 to 3 show a novel form of a heavy-weight hand gun, in which a gun body 1 has a grip portion 2, a body portion 3 and An atomizing head 4 is integrally formed at the tip of the body 3, and a trigger 5 for advancing and retracting a needle valve (not shown) is provided, and a paint cup (not shown) is attached to the gun body 1. A paint nipple 6 is formed, and an air nipple to which an air hose (not shown) is connected is provided at the lower end of the grip portion 2.

Further, the grip 2 has a central axis Z of 30 with respect to a direction Y perpendicular to the central axis X of the needle in the gun body 1.
It is formed integrally with the gun body 1 at an attachment angle of 60 to 60 degrees. In this case, the center of the hand holding the grip portion 2, that is,
The distance L between the center A of the grip portion and the center of gravity B of the gun is about 2/3 or more shorter than that of the conventional hand gun shown in FIG. Incidentally, the drawings shown as examples show the form of the handgun in the case where the mounting angle of the grip portion 2 is 45 degrees.

On the lower side of the body 3 to which the paint nipple 6 of the gun body 1 is attached, a finger hooking piece 8 composed of a concave portion or a convex portion for an operator to hang an index finger to support the weight of the gun tip portion. Are formed.

Further, a pattern adjusting knob 9 is formed on the side surface of the body portion 3 so as to allow the operator to adjust the knob by operating the thumb while the operator holds the gun. The pattern adjusting knob 9 can also be attached to the upper part of the body portion 3 which can be operated by the thumb. In the figure, 10 is a needle valve adjusting knob.

As described above, the angle from the vertical direction Y of the central axis X of the needle of the gun body 1 to the central axis Z of the grip 2 is 30 to 60 degrees (15 ° to 3 in the conventional hand gun).
0 °) minimizes the force exerted on the operator's hand, wrist and arm as shown in FIG. 3 from the viewpoint of ergonomics. This is self-evident when compared with the case of the conventional handgun of FIGS. 4 and 5, and the distance L between the center of gravity B and the center A of the grip portion of the handgun of the present invention is about 2/3 shorter than that of the conventional handgun. Moreover, the weight G of the gun tip (the weight g of the paint in the paint cup is added to the weight of the handgun) is placed on the index finger and transmitted directly to the hand, and the force applied from the hand to the handgun is as shown in FIG. From the distribution of F'1, F'2, and F'3 near the grip in the case of a handgun, F1, which spreads over the entire handgun as shown in FIG.
The distribution is changed to F2 and F3, and the moment that becomes an instability factor is eliminated, so that the most labor is saved.

Further, the right angle α with respect to the central axis Z of the grip portion 2 with respect to the direction perpendicular to the central axis X of the needle of the gun body 1 is set to 30 ° to 60 °, which is shown in FIG. That is, when the angle α is 30 degrees or less, the muscles on the upper side of the arm gripping the cancer contracts and the muscles on the lower side of the arm extend as shown in FIG. 8, and when the angle α is 60 degrees or more, the arm It has been found that the force exerted on the arm of the operator holding the gun is large, and therefore tired easily, because the upper muscle extends and the lower muscle contracts. Therefore, by setting the angle α in the range of 30 to 60 degrees as described above,
The extension and contraction of muscles on the arm that holds the cancer is reduced, and the cancer does not get tired easily.

Further, as shown in FIG. 2, when the trigger 5 is operated, the force f applied to the trigger 5 is reduced by utilizing the weight G2 of the hand gun, and the load on the finger is reduced.

On the other hand, as shown in FIG. 4, when the grip portion 2 is mounted at an angle of 30 to 60 degrees, about half of the grip portion 2 of the handgun becomes an unnecessary grip, which can be cut off. It also reduces the weight of the gun itself.

Furthermore, the pattern adjusting knob 9 provided on the side surface of the gun body 1 can be rotated with a thumb to adjust the pattern width with one hand, and the gun can be held while the operation is convenient.

FIG. 6 shows a novel form of a suction handgun in which a paint container is attached to the gun body, and FIG. 7 shows a conventional example of a suction handgun. Common parts are given the same reference numerals.

That is, the grip portion 2, the body portion 3 and the atomizing head 4 are integrally formed on the body portion 3 of the gun body 1, the trigger 5 is provided, and the paint nipple 6'is provided below the body portion 3. An air nipple 7 is provided below the grip portion 2. The grip portion 2 is formed such that the center axis Z of the grip portion 2 is at an attachment angle of 30 to 60 degrees with respect to the vertical direction Y of the center axis X of the needle, and the distance L between the center of gravity B of the gun and the center A of the grip portion is L. Are closer to each other, and are formed to be about 2/3 or more shorter than the conventional handgun.

Further, finger hanging pieces 8'are formed on the lower side of the body portion 3 having the paint nipple 6'formed thereon, and pattern adjusting knobs 9 are attached to the side surfaces of the body portion 3, respectively. or,
The pattern adjusting knob 9 can be attached to the upper portion 3a of the body portion 3.

In the handgun of FIG. 6, the force F'in the vicinity of the grip shown in FIG. 7 in the case of the conventional handgun, F '.
From the distribution of 1, F'2, F'3, F spread over the entire gun
The distribution of 1, F2, F3 is changed, and the moment which becomes an instability factor is eliminated, and the same action as that of the weight type hand gun described above is achieved.

[0023]

As described above, in the hand gun of the present invention, the distance between the center of gravity of the gun and the center of the grip portion is shortened because the mounting angle between the gun body and the grip portion is set to 30 to 60 degrees. It is a handgun that does not get tired of the hands, wrists, and arms, and is a handgun that is even easier to hold because it is possible to cut down about half the grip and reduce the size and weight of the handgun.

Further, since the weight of the tip portion can be directly transmitted to the hand by providing the finger hanging piece for putting the weight of the tip portion of the gun on the index finger, the force of the gun is dispersed from the vicinity of the grip portion to the entire gun, The moment that becomes an instability factor has been eliminated.

Further, in the prior art, since the gun trigger is painted by the finger for painting, the finger is very tired. However, in the hand gun of the present invention, the weight of the gun itself is used for the trigger operation. The force of the finger that pulls the trigger can be greatly reduced because it is possible.

[Brief description of drawings]

FIG. 1 is a front view of a weight type hand gun showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an operating state of the same.

FIG. 3 is an explanatory view showing a mounting angle of the grip portion and a distribution of force reception.

FIG. 4 is an explanatory diagram showing a distribution of a mounting angle and a force receiving force of a grip portion of a conventional weight type handgun.

FIG. 5 is an explanatory diagram of an operating state of a conventional weight type hand gun.

FIG. 6 is an explanatory view showing an attachment angle and a force receiving distribution of a grip portion of a blow-up type handgun showing an embodiment of the present invention.

FIG. 7 is an explanatory diagram showing an attachment angle and a force receiving distribution of a grip portion of a conventional blow-up type handgun.

FIG. 8 is an explanatory diagram showing a mounting angle of a grip portion and extension and contraction of arm muscles according to an embodiment of the present invention.

[Explanation of symbols]

 1 Gun body 2 Grip section 3 Body section 4 Atomizing head 5 Trigger 8, 8'Finger hanging piece 9 Pattern adjustment knob A Center of grip section B Gun center of gravity L, L'Distance between center of grip section and gun center of gravity X Needle Central axis Y vertical direction Z central axis of grip

Claims (3)

[Claims] 1. A hand air spray gun in which a grip portion, a body portion, and an atomizing head are integrally formed at the tip of the body of the gun body, and a trigger for advancing and retracting a needle valve is provided in the gun body. The central axis of the grip portion is integrally formed at a mounting angle of 30 to 60 degrees with respect to the vertical direction of the central axis of the needle,
An ultra-lightweight hand spray gun characterized by bringing the center of gravity of the gun closer to the center of the grip. 2. A hand air spray gun in which a grip portion, a body portion, and an atomizing head are integrally formed on the gun body, and a trigger for advancing and retracting a needle valve is provided in the gun body. The central axis of the grip portion is integrally formed at a mounting angle of 30 to 60 degrees with respect to the vertical direction of the central axis of the needle,
An ultra-lightweight hand spray gun characterized in that the center of gravity of the gun is brought closer to the center of the grip, and a finger hook that supports the weight of the tip of the gun with the index finger is formed on the lower side of the gun body. 3. A hand air spray gun in which a grip portion, a body portion, and an atomizing head portion are integrally formed at the tip of the body portion of the gun body, and a trigger for advancing and retracting a needle valve is provided. The central axis of the grip portion is integrally formed at a mounting angle of 30 to 60 degrees with respect to the vertical direction of the central axis of the needle,
While making the center of gravity of the gun closer to the center of the grip, form a finger hook on the lower side of the gun to support the weight of the tip of the gun with your index finger, and use a pattern adjustment knob that can be operated with your thumb on the side or top of the body. Ultra lightweight hand spray gun characterized by being installed.