JP6554687B2 - Spray gun - Google Patents

Description

  The present invention relates to a spray gun.

  There is known a spray gun that ejects a liquid such as paint from the tip, sprays a gas on the liquid, atomizes the liquid, and applies the atomized liquid to an object to be coated (see Patent Document 1).

  In such a spray gun, in order to adjust the spray state of the atomized liquid, a pattern air adjustment knob for adjusting the angular air supply amount of the air cap arranged at the liquid jet outlet, A liquid supply amount adjustment knob for adjusting the supply amount of the liquid ejected from the tip is provided. The spray state can be changed by adjusting these adjustment knobs.

For example, the spraying range of the atomized liquid can be reduced by closing the liquid supply amount adjustment knob, and the spraying range can be increased by opening the knob.
Also, if the pattern air adjustment knob is opened and the amount of pattern adjustment air is increased, the atomized liquid spray shape becomes elliptical and the atomized liquid spray range extends in the long axis direction of the ellipse and is wide. It becomes possible to spray the atomized liquid. On the contrary, if the pattern air adjustment knob is closed and the amount of ejection of the pattern adjustment air is reduced, the atomized liquid spray shape approaches a circle and the atomized liquid spray range becomes smaller.
Then, by adjusting the spray state of the atomized liquid, the atomized liquid is appropriately sprayed on the object to be coated (the appropriate application range in which the atomized liquid is sprayed) and then the fine particles are obtained. The operation of applying the chemical liquid is performed.

Japanese Patent Laid-Open No. 02-102755 Japanese Patent Laid-Open No. 04-126562 Japanese Utility Model Publication No. 05-022279

  By the way, the application range of the atomized liquid (spreading method at the time of spraying) also changes depending on the trigger amount of the spray gun, and when the trigger is pulled slightly, the application range of the atomized liquid becomes smaller and the more In this state, the application range of the atomized liquid becomes large.

For this reason, the application range of the atomized liquid is changed in about two steps by taking the trouble of adjusting the pattern adjustment knob and the liquid supply amount adjustment knob as described above. That is, in the case of changing the narrow application range and the large application range, the application range of the atomized liquid is changed by changing the trigger pulling amount, and the application of the atomized liquid to the object is often performed.
Note that a state where the trigger is pulled only halfway is called half-opened in order to make the coating range about half of the maximum coating range where the trigger is pulled to the maximum. Hereinafter, the position of the trigger pulling amount until the middle is described as half open.

  However, it is difficult for those who are not skilled workers to perform half-opening in which the application range of the atomized liquid is always the same. The trigger pull amount is small and the spraying range of the atomizing liquid becomes too small because the triggering amount is the same, or conversely, the triggering amount is large and the spraying range of the atomizing liquid is large. Too much happens.

  The present invention has been made in view of such circumstances, and the position of the predetermined half-opening can be recognized sensuously, and repeated half-opening within the application range of the same level of atomized liquid can be performed without being a skilled worker. An object of the present invention is to provide a spray gun that can be used.

The present invention is grasped by the following composition.
(1) The spray gun according to the present invention includes a needle that moves by a trigger operation and opens and closes a liquid outlet at a nozzle tip, a first elastic body that biases the needle toward the liquid outlet, and the needle A moving member that is arranged on the rear end side and moves following the urging of the needle to a position to stop the needle, and a second elastic body that urges the moving member toward the needle, In a state where the needle closes the liquid ejection port, a contact portion that contacts the rear end of the needle of the moving member is disposed so as to be separated from the rear end of the needle by a predetermined distance.

(2) In the configuration of (1), the first elastic body and the second elastic body have different spring constants.
(3) In the configuration according to (1) or (2), the first elastic body has a smaller spring constant than the second elastic body.
(4) In the configuration according to any one of (1) to (3), the predetermined distance is equal to or less than half of a maximum movement distance of the needle.

(5) In any one of the constitutions (1) to (4), a flange portion provided on the needle and receiving one end of the first elastic body made of a coil spring is disposed on the rear end side of the needle. A first receiving member that receives the other end of the first elastic body that is mounted so as to cover the needle and has a through-hole for disposing a contact portion of the moving member on the needle side; A flange portion that is provided on the member and receives one end of the second elastic body made of a coil spring, and is disposed on the rear end side of the first receiving member, receives the flange portion of the moving member, and receives the flange portion of the moving member. An accommodating member that accommodates the moving member having a restricting portion that restricts movement toward the needle side, and the second elastic body that is disposed on the rear end side of the accommodating member and is mounted so as to cover the moving member Receive the other end of Rutotomoni the rear end of the moving member abuts and a second receiving member for regulating the movement amount of the moving member.
(6) In the configuration of (5), the housing member is attached by screwing to a rear end side of the first receiving member, and the predetermined distance is relative to the first receiving member of the housing member. Adjustable by screwing amount.
(7) In the configuration of the above (5) or (6), the second receiving member is attached by being screwed to a rear end side of the housing member, and the maximum moving distance of the needle is set to the second receiving member. It can be adjusted by the amount of screwing of the member to the housing member.

(8) In any one of the constitutions (1) to (4), a flange portion provided on the needle and receiving one end of the first elastic body made of a coil spring is disposed on the rear end side of the needle. A first receiving member receiving the other end of the first elastic body mounted to cover the needle and having a through hole for disposing a contact portion of the moving member on the needle side; 1 is arranged so as to cover the receiving member, receives one end of the second elastic body at the flange portion on the outer periphery of the front end, and the moving member is urged toward the needle side by the urging force of the second elastic body. An urging force transmission member to which the moving member is connected and a rear end side of the urging force transmission member are arranged to receive the other end of the second elastic body and insert the rear end of the urging force transmission member. Has a bottom with a through hole A second receiving member and an attachment provided on the rear end side of the spray gun to receive the front end of the biasing force transmitting member and restrict the movement of the moving member to the needle side and to which the second receiving member is connected The biasing force transmission member includes a step surface connecting a portion having a large outer diameter on the front end side and a portion having a small outer diameter on the rear end side, and the step surface is a portion of the second receiving member. The amount of movement of the moving member is regulated by contacting the bottom surface.
(9) In the configuration of (8), the urging force transmission member has a through hole for arranging a contact portion of the moving member on the needle side, and the urging force transmission member has a through hole. The moving member is screwed and connected, and the predetermined distance can be adjusted by a screwing amount of the moving member with respect to the biasing force transmitting member.
(10) In the configuration of (8) or (9), the second receiving member is screwed to the mounting portion, and the maximum moving distance of the needle is the second receiving member with respect to the mounting portion. The amount of screwing can be adjusted.

(11) The spray gun of the present invention is mounted so as to cover the needle, which moves by a triggering operation and opens and closes the liquid jet nozzle at the tip of the nozzle, and biases the needle toward the liquid jet outlet A first elastic body comprising a coil spring, a flange portion provided on the needle for receiving one end of the first elastic body, a rear end side of the needle, and a position where the needle is stopped A moving member having an abutting portion that contacts the rear end of the needle that moves following the biasing, and is disposed on the rear end side of the needle, receives the other end of the first elastic body, and A second receiving member comprising a first receiving member having a through-hole for disposing a contact portion on the needle side, and a coil spring mounted so as to cover the moving member and biasing the moving member toward the needle side. A body, a flange portion provided on the moving member and receiving one end of the second elastic body, and a rear end side of the first receiving member, receiving the flange portion of the moving member, An accommodating member that accommodates the moving member having a restricting portion that restricts movement toward the needle side, and a rear end side of the accommodating member that receives the other end of the second elastic body and the moving member And a second receiving member that regulates the amount of movement of the moving member, and in a state where the needle closes the liquid ejection port, the rear end of the needle of the moving member An abutting portion that abuts is disposed so as to be separated from the rear end of the needle by a predetermined distance.
(12) The spray gun of the present invention has a flange portion, and has a needle that moves by a triggering operation to open and close a liquid outlet at the tip of the nozzle, and a contact portion that contacts the rear end of the needle. A moving member that is arranged on the rear end side of the needle and moves to follow the urging force of the needle to a position where the needle is stopped, and covers the needle until one end abuts against a flange portion of the needle. A first elastic body comprising a coil spring that is mounted and urges the needle toward the liquid spout; and is disposed on the rear end side of the needle so as to cover the first elastic body; A first receiving member having a through hole for receiving the other end and arranging a contact portion of the moving member on the needle side; and a contact portion of the moving member arranged to cover the first receiving member On the needle side A biasing force transmission member having a through hole for screwing and connecting the moving member and a flange portion provided on the outer periphery of the front end, and the biasing force until one end abuts on the flange portion of the biasing force transmission member A second elastic body that is mounted so as to cover the transmission member and urges the moving member toward the needle via the urging force transmission member, and a rear end side of the urging force transmission member is covered. And a second receiving member having a bottom surface formed with a through hole for receiving the other end of the second elastic body and inserting a rear end of the urging force transmitting member, and a front end of the urging force transmitting member. And a mounting portion provided on the rear end side of the spray gun to which the second receiving member is screwed and connected, and the biasing force transmitting member includes , Of the second receiving member The step surface for regulating the amount of movement of the moving member by contacting the surface is formed as a portion connecting a portion having a large outer diameter on the front end side and a portion having a small outer diameter on the rear end side, The maximum moving distance of the needle can be adjusted by the screwing amount of the second receiving member with respect to the mounting portion, and the contact portion of the moving member in a state where the needle closes the liquid ejection port, A separation distance from the rear end of the needle can be adjusted by a screwing amount of the moving member with respect to the biasing force transmitting member.

  According to the present invention, there is provided a spray gun capable of sensibly recognizing a predetermined half-open position, and capable of repeatedly performing a half-open in which the same level of atomized liquid is applied without being a skilled worker. be able to.

It is sectional drawing of the spray gun which concerns on Embodiment 1 of this invention. It is a principal part exploded view of the spray gun concerning Embodiment 1 of the present invention. It is sectional drawing for demonstrating operation | movement of the spray gun which concerns on Embodiment 1 of this invention, (A) is a figure which shows the state before pulling a trigger, (B) is the trigger pulling which becomes half open It is a figure which shows the state of quantity, (C) is a figure which shows the state which pulled the trigger to the maximum. It is a figure which shows the principal part of the spray gun which concerns on Embodiment 2 of this invention, (A) is an exploded sectional view, (B) is sectional drawing. It is sectional drawing for demonstrating operation | movement of the spray gun which concerns on Embodiment 2 of this invention, (A) is a figure which shows the state before pulling a trigger, (B) is the trigger pulling which becomes half open It is a figure which shows the state of quantity, (C) is a figure which shows the state which pulled the trigger to the maximum. It is a figure which compares the length of the principal part of the spray gun of 1st Embodiment of this invention, and the principal part of the spray gun of 2nd Embodiment.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.
Further, in the following description, the expressions “front end” and “front” represent the position and direction on the side close to the liquid ejection port in each member or the like, and conversely, the expressions “rear end” and “rear” Used to represent the position and direction on the side far from the liquid jet.

(First embodiment)
FIG. 1 is a cross-sectional view of the spray gun of this embodiment as viewed from the side.
As shown in FIG. 1, the spray gun 1 of the present embodiment includes a nozzle 2 having a liquid jet 2 a at the tip, and a trigger 3 that opens and closes the liquid jet 2 a at the tip of the nozzle 2 by operating the trigger 3. And a connected needle 4.

  Further, a first elastic body comprising a flange portion 4a provided at an intermediate portion near the rear end of the needle 4 and a coil spring disposed on the rear end side of the needle 4 so that one end thereof is brought into contact with the flange portion 4a. 5 and a first receiving member 6 that is disposed on the rear end side of the needle 4 and receives the other end of the first elastic body 5, and the needle 4 causes the liquid spout to be ejected by the first elastic body 5. Always energized to the 2a side.

Therefore, when the trigger 3 is not pulled, the needle 4 is urged by the first elastic body 5 toward the liquid jet port 2 a at the tip of the nozzle 2. The tip of the needle 4 is inserted into the liquid jet 2 a at the tip of the nozzle 2, and the liquid jet 2 a is blocked by the tip of the needle 4.
On the other hand, when the trigger 3 is pulled, the needle 4 moves to the rear end side in conjunction with the trigger 3, and the tip of the needle 4 comes out of the liquid jet 2a at the tip of the nozzle 2, so that the liquid jet 2a is opened. It becomes the state.

An air valve 20 for opening and closing the air flow path is provided in the vicinity of the intermediate portion of the needle 4. When the needle 4 is urged toward the liquid jet port 2a at the tip of the nozzle 2, the flow of air supplied from the air supply port 22 is stopped at a location 21 in the middle of the air flow path.
When the trigger 3 is pulled, the air valve 20 also moves to the rear end side, the air flow path is opened, air is supplied to the front end 23 of the air flow path, and the air supplied to the front end 23 is The air is ejected from the air outlet 31 and the pattern adjusting air outlet 32 around the tip of the nozzle 2 to be formed.

The amount of air supplied to the pattern adjustment air outlet 32 can be adjusted by the pattern air adjustment knob 40.
Specifically, when the pattern air adjustment knob 40 is rotated, the opening degree of the air flow path to the pattern adjustment air outlet 32 is changed by the air adjustment needle 41, and air is supplied to the pattern adjustment air outlet 32. It can be adjusted up to the fully closed position.
Further, an overall air adjustment knob 24 is provided in the vicinity of the air supply port 22, and by adjusting the overall air adjustment knob 24, the air is sent to an air valve 20 for opening and closing the air flow path. The amount of air can be adjusted.

Here, at the time of use, a liquid supply pipe (not shown) is connected to the liquid supply port 7, and the liquid is supplied from the liquid supply port 7 to the gap 8 between the nozzle 2 and the needle 4. Further, since an air supply pipe (not shown) is connected to the air supply port 22 and air is supplied to the air valve 20, when the trigger 3 is pulled, the air outlet 31 and the pattern Air is ejected from the adjustment air outlet 32, and then liquid is ejected from the liquid outlet 2a at the tip of the nozzle 2.
The ejected liquid is atomized almost at the same time as it is ejected, and becomes a atomized liquid.
Then, when the pulling of the trigger 3 is stopped, the ejection of the liquid is stopped, and subsequently, the ejection of air from the air outlet 31 and the pattern adjusting air outlet 32 is also stopped.

Further, as shown in FIG. 1, the spray gun 1 includes a rod-shaped moving member 9 disposed so as to be separated from the rear end 4 b of the needle 4 by a predetermined distance. As for the moving member 9, the front-end | tip 9a of the moving member 9 is arrange | positioned at the needle 4 side through the through-hole 6b formed in the receiving surface 6a which has received the other end of the 1st elastic body 5 of the 1st receiving member 6.
As will be described in detail later, the distal end 9 a of the moving member 9 constitutes a contact portion that contacts the rear end 4 b of the needle 4.

Specifically, the moving member 9 is attached to the rear end portion of the first receiving member 6 in a state where the moving member 9 is accommodated in the accommodating member 10 disposed on the rear end side of the first receiving member 6. Therefore, it is arranged on the rear end side of the needle 4.
In the present embodiment, a male screw structure is formed on the outer periphery of the rear end portion of the first receiving member 6, and a female screw structure is formed on the inner peripheral surface of the distal end portion of the housing member 10. The housing member 10 is attached to the first receiving member 6 by being screwed into the first receiving member 6.

Further, a flange portion 9 b is provided at the intermediate portion of the moving member 9. On the other hand, a portion having an inner diameter smaller than that of the flange portion 9b is provided inside the housing member 10, and the portion having the smaller inner diameter receives the flange portion 9b of the moving member 9 so that the moving member 9 moves toward the needle 4 side. Is restricted from moving.
Therefore, the portion having the small inner diameter serves as a restricting portion that restricts the movement of the moving member 9.

Further, the flange portion 9b of the moving member 9 receives one end of the second elastic body 11 made of a coil spring disposed on the rear end side of the moving member 9, and the other end of the second elastic body 11 is the receiving member. 10 is received by the second receiving member 12 attached to the rear end side.
For this reason, the moving member 9 is always urged toward the needle 4 by the second elastic body.

  In the present embodiment, a female screw structure is formed on the inner peripheral surface of the rear end portion of the housing member 10, and a male screw structure is formed on the outer peripheral surface of the distal end portion of the second receiving member 12, whereby the distal end portion of the second receiving member 12 is formed. The second receiving member 12 is attached to the housing member 10 by being screwed into the housing member 10.

  Referring to FIG. 2, the specific assembling procedure of each member will be described. The first elastic body covers the needle 4 from the rear end side of the needle 4 until one end abuts against the flange portion 4 a of the needle 4. Wear 5

Next, the first receiving member 6 is mounted so as to receive the first elastic body 5 mounted from the rear end side of the needle 4 inside, and the first receiving member 6 is mounted to the mounting portion 50.
A female screw structure is formed on the inner peripheral surface of the mounting portion 50, and a male screw structure is formed on the outer peripheral surface of the first receiving member 6. The first receiving member 6 can be attached to the attachment portion 50 by being screwed into the attachment portion 50.

  Subsequently, after attaching the positioning nut 51 so as to be screwed into the male screw structure formed on the outer periphery of the rear end of the first receiving member 6, the first receiving member 10 is brought into contact with the positioning nut 51 and stopped. The housing member 10 is attached to the first receiving member 6 by being screwed to the member 6.

As described with reference to FIG. 1, the movement of the moving member 9 toward the needle 4 is restricted by the flange portion 9 b of the moving member 9 coming into contact with the portion where the inner diameter of the housing member 10 is reduced. The distance between the rear end 4b of the needle 4 and the front end 9a of the moving member 9 can be adjusted depending on how much the housing member 10 is screwed to the first receiving member 6.
Therefore, when the trigger 3 is pulled and the needle 4 is moved to the rear end side, how much the needle 4 moves to the rear end side and the rear end 4b of the needle 4 contacts the front end 9a of the moving member 9 Can be changed.

  Returning to FIG. 2, the description will be continued. Subsequently, after the distal end 9a of the moving member 9 is inserted from the rear end side of the housing member 10 so as to pass through the through hole 6b of the first receiving member 6, the moving member 9 moves until one end abuts against the flange portion 9b. The second elastic body 11 is mounted so as to cover the moving member 9 from the rear end side of the member 9.

Finally, the second receiving member 12 is screwed into the rear end portion of the housing member 10 so as to receive the other end of the second elastic body 11 therein.
At this time, as shown in FIG. 1, the screwing amount of the second receiving member with respect to the housing member 10 is adjusted so that the rear end 9c of the moving member 9 and the second receiving member 12 are separated by a predetermined distance.

Next, the effect of the above configuration when pulling the trigger 3 will be described with reference to FIG.
FIG. 3A shows a state before the trigger 3 is pulled, and in this state, a predetermined distance from the distal end 9a of the moving member 9 serving as an abutting portion that abuts the rear end 4b of the needle 4 is shown. It is in a separated state.

When the trigger 3 is pulled and the needle 4 moves toward the moving member 9 by an amount corresponding to the separation distance, as shown in FIG. 3B, the rear end 4b of the needle 4 and the front end 9a of the moving member 9 , And the touch when this contact is transmitted to the finger pulling the trigger 3.
Therefore, by setting the abutting position to be an appropriate half-open position, the half-open position can be sensuously understood even by a skilled worker. Therefore, it is possible to repeatedly perform half-opening in which the application range (spreading range of the atomized liquid) of the same level of atomized liquid is repeated.

  Further, when the trigger 3 is continuously pulled from the half-open state, the moving member 9 moves following the urging force of the needle 4, and when the rear end 9 c of the moving member 9 contacts the second receiving member 12, it is further The trigger 3 cannot be pulled, and at this time, the application range (spreading range) of the atomized liquid is maximized (see FIG. 3C).

As described above, according to the spray gun 1 of the present embodiment, the half-open position can be perceived sensuously, so that the pulling amount of the trigger 3 can be easily set to the half-open state without being a skilled worker.
Moreover, it is possible to immediately change the state of the maximum application range of the atomized liquid by simply pulling the trigger 3 from the half-open state.

  For example, a stopper is provided so that the trigger 3 cannot be pulled beyond the half-open position. If the stopper is set, it will be half-open, and if the stopper is removed, the trigger 3 can be pulled to the maximum pull amount. Such a configuration is also conceivable, but in such a configuration, it is necessary to operate the stopper, so that it is not possible to instantaneously switch between the half-open state and the maximum pulling state.

On the other hand, in the case of the spray gun 1 of the present embodiment, there is no need to operate such a stopper, and the pulling amount of the trigger 3 can be changed instantaneously.
Further, since the trigger 3 is not forcibly stopped at the half-open position, the trigger 3 can be pulled to a position other than the half-open position. The spray gun 1 with a very high degree of freedom of work can be realized.

  By the way, as can be seen from the above description of the operation, the position where the operator can actually realize the half-opening is the contact between the rear end 4b of the needle 4 and the moving member 9 without pulling the trigger 3 shown in FIG. It is determined by how far the tip 9a that is the contact portion is separated. Further, the maximum movement distance of the needle 4 is determined by adding the separation distance between the rear end 9c of the moving member 9 and the second receiving member 12 in the state shown in FIG.

  The maximum moving distance of the needle 4 may be set to a state where the tip of the needle 4 is just removed from the liquid jet 2a at the tip of the nozzle 2, but then the trigger 3 of the operator is weak and maximized. If a situation occurs in which the trigger 3 is not completely pulled even though the trigger 3 is intended to be pulled, the operator performs the coating operation in the maximum atomized liquid application range (the state in which the atomized liquid is most spread). In spite of trying to perform, the application range of the atomized liquid to be actually sprayed (spreading range of the atomized liquid) becomes a small range contrary to the expectation, and the application operation may not be successful.

  For this reason, it is preferable to set a large maximum moving distance of the needle 4 so that the needle 4 can move to a position where the tip of the needle 4 can be completely removed from the liquid ejection port 2a at the tip of the nozzle 2.

  When the maximum moving distance of the needle 4 is set in this way, a predetermined distance between the rear end 4b of the needle 4 and the front end 9a serving as the contact portion of the moving member 9 is set to be the distance of the needle 4 An appropriate half-open position can be obtained by setting it to half or less of the maximum movement distance.

  Further, there is some individual difference in how much the maximum moving distance of the needle 4 is set for the operator, but in the spray gun 1 of the present embodiment, the second receiving member 12 is provided. The separation distance between the rear end 9c of the moving member 9 and the second receiving member 12 shown in FIG. 3A can be changed depending on the degree to which the receiving member 10 is screwed. The maximum moving distance of the needle 4 can be freely adjusted.

  Further, in the above description, the case where the half-open position is set at a position that is about half of the maximum application range where the application range of the atomized liquid is maximized (the state in which the liquid spreads most) has been described. The half-open position need not be limited to such a position. For example, the application range may be set to be about 1/3 of the maximum application range, or may be set to a half-open position where the application range of the finely atomized liquid (spreading state of the atomized liquid) is frequently used. .

  As described above, the recognition of the half-open position is based on the feeling transmitted to the finger pulling the trigger 3 when the rear end 4b of the needle 4 and the tip 9a serving as the contact portion of the moving member 9 contact each other. It is possible to change the half-open recognition position by changing the position of the tip 9a that becomes the contact portion of the moving member 9.

  A method for changing the half-open position will be described with reference to FIG. For example, when the positioning nut 51 is moved to the distal end side of the first receiving member 6, the accommodating member 10 is further screwed to the first receiving member 6, and the accommodating member 10 is moved to the distal end side, the moving member 9 is also located closer to the needle 4 side, so that the rear end 4b of the needle 4 and the tip 9a that is the contact portion of the moving member 9 come into contact with each other, and it is necessary to recognize half-opening. The pulling amount of the trigger 3 can be adjusted to be small.

  Conversely, when the screwing amount of the housing member 10 with respect to the first receiving member 6 is reduced and the position of the housing member 10 is moved backward from the state of FIG. 3A, the tip 9a of the moving member 9 is also moved backward. . That is, since the needle 4 is separated from the rear end 4b of the needle 4, the rear end 4b of the needle 4 is brought into contact with the tip 9a serving as a contact portion of the moving member 9, and the trigger 3 necessary for recognizing half-opening is required. It can be adjusted to increase the pulling amount.

  The positioning nut 51 is not only positioned but also firmly contacts the housing member 10 to prevent the housing member 10 from gradually rotating and shifting its position due to vibration during use. When the member 10 is moved rearward and separated from the positioning nut 51, it is preferable that the positioning nut 51 is also moved rearward so as to be firmly in contact with the housing member 10.

Although the first embodiment has been described above, the present invention is not limited to the above specific examples.
For example, the elastic force (spring constant) of the first elastic body and the second elastic body may be made different so that the trigger 3 can be easily stopped accurately at the half-open position.

  In this case, when the spring constant of the second elastic body is increased and the spring constant of the first elastic body is decreased, the rear end 4b of the needle 4 and the front end 9a serving as the contact portion of the moving member 9 are in contact with each other. Furthermore, since the load on the finger when trying to pull the trigger 3 increases, it is possible to easily stop the finger pulling the trigger 3 at the half-open position.

  Moreover, although the said embodiment demonstrated the case where a coil spring was used as the 1st elastic body 5 and the 2nd elastic body 11, these elastic bodies play the role which urges | biases the needle 4 and the moving member 9 to the front end side. It is not necessary to be limited to a coil spring because it only plays.

However, when the coil spring is used, the needle 4 and the moving member 9 can be mounted so as to cover the needle 4 and the moving member 9 as shown in the above-described embodiment. It functions as a guide for elastic deformation (elongation and contraction) of the elastic body, and stable elastic deformation of the elastic body can be realized.
Therefore, it is preferable to use a coil spring for the first elastic body 5 and the second elastic body 11.

(Second Embodiment)
Next, the spray gun 1 of 2nd Embodiment is demonstrated, referring FIG.4 and FIG.5.

In the second embodiment as well, the basic configuration of the overall spray gun 1 is the same as that of the first embodiment, and the difference is that the component allows the operator to experience the half-open position as a touch transmitted to the finger. The length toward the rear side is shortened to achieve compactness.
Therefore, in the following, the configuration of the different parts will be mainly described, and description of points that are the same may be omitted.

4A is an exploded cross-sectional view corresponding to FIG. 2, and FIG. 4B is a cross-sectional view corresponding to FIG. 3A.
First, a specific attachment procedure of each member will be described with reference to FIG. 4, and then, with reference to FIG. 5, the spray gun 1 of the second embodiment can operate similarly to the first embodiment. Explain what is.
In addition, the same number is attached | subjected about the member similar to 1st Embodiment.

  As shown in FIG. 4A, in the second embodiment as well, in the same way as in the first embodiment, a mounting portion 50 is provided on the rear end side of the spray gun 1, and the needle located in the mounting portion 50 is provided. The first elastic body 5 made of a coil spring is mounted so as to cover the needle 4 from the rear end side of the needle 4 until one end abuts against the flange portion 4a of the needle 4 (see FIG. 4B).

Next, as shown in FIG. 4A, as in the first embodiment, the first elastic body 5 mounted from the rear end side of the needle 4 is received inside, that is, the first elastic body 5 is The first receiving member 6 is arranged on the rear end side of the needle 4 so as to cover it.
More specifically, the first receiving member 6 is attached to the attachment portion 50 provided at the rear end of the spray gun 1.

When this attachment is demonstrated, as shown to FIG. 4 (A), the attachment part 50 of 2nd Embodiment is provided with the small diameter part 50a in the front side, and formed the large diameter part 50b subsequently. ing.
As will be described later, the large-diameter portion 50b is not a circular cross section, but is, for example, a hole whose cross section is a square cross section such as a hexagon.

  A female screw structure is formed on the inner peripheral surface of the small diameter portion 50a. On the other hand, since a male screw structure 6c is formed on the front side of the first receiving member 6, the male screw structure 6c is formed with a small diameter. The first receiving member 6 is attached to the attachment portion 50 as described above by being screwed into the female screw structure on the inner peripheral surface of the portion 50a.

  As shown in FIG. 4A, the first receiving member 6 of the second embodiment is also formed on the receiving surface 6a that receives the other end of the first elastic body 5 in the same manner as the first receiving member 6 of the first embodiment. As shown in FIG. 4 (B), a tip 9a that is a contact portion of the moving member 9 is arranged on the needle 4 side through the through-hole 6b. .

When the first receiving member 6 is attached to the attachment portion 50 so that the other end of the first elastic body 5 is received by the receiving surface 6 a, the urging force for transmitting the urging force of the second elastic body 11 to the moving member 9 next. The transmission member 90 is inserted into the large diameter portion 50 b of the attachment portion 50 so as to cover the first receiving member 6.
As shown in FIG. 4B, the tip surface of the large diameter portion 50b, that is, the step surface that becomes the boundary between the small diameter portion 50a and the large diameter portion 50b receives the front end surface of the biasing force transmitting member 90. Therefore, the forward movement of the urging force transmission member 90 is restricted.

  In the first embodiment, as shown in FIG. 1, a flange portion 9 b that receives one end of the second elastic body 11 is formed directly on the moving member 9. In the second embodiment, as shown in FIGS. 4A and 4B, the portion corresponding to the flange portion 9b is configured as a separate member as the urging force transmission member 90. Like to do.

The urging force transmission member 90 will be described in more detail. A receiving hole 90 a for receiving the first receiving member 6 is provided on the front side of the urging force transmission member 90.
And the through-hole 90c for arrange | positioning the front-end | tip 9a of the moving member 9 to the needle 4 side is formed in the rear-end surface 90b of the receiving hole part 90a.

Further, a flange portion 90 d that protrudes outward to receive one end of the second elastic body 11 is formed on the outer periphery of the front end of the urging force transmission member 90 on the front side.
The outer shape of the flange portion 90d is, for example, a hexagonal shape so as to match the inner shape of the large-diameter portion 50b of the mounting portion 50.
For this reason, the urging force transmission member 90 inserted between the first receiving member 6 and the large-diameter portion 50b of the attachment portion 50 is configured to receive the first receiving member 6 in the receiving hole portion 90a. It slides in the front-rear direction without rotating within 50b.

As described above, when the urging force transmission member 90 is inserted into the large-diameter portion 50 b of the mounting portion 50 and the urging force transmission member 90 is disposed so as to cover the first receiving member 6, the urging force transmission member is then applied. The second elastic body 11 made of a coil spring is mounted from the rear end side of the 90 so as to cover the urging force transmission member 90 until it abuts against the flange portion 90d of the urging force transmission member 90.
That is, the second elastic body 11 is applied until one end of the second elastic body 11 comes into contact with the flange portion 90d of the urging force transmission member 90 so as to cover the outer periphery of the urging force transmission member 90 from the rear end side of the urging force transmission member 90. Insert.

Subsequently, the second receiving member 12 is attached to the attachment portion 50 so as to cover the other end side of the second elastic body 11.
Specifically, a male screw structure is formed on the outer peripheral surface on the rear end side of the mounting portion 50, while a female screw structure is formed on the inner peripheral surface on the front side of the second receiving member 12.
For this reason, the 2nd receiving member 12 is attached to the attaching part 50 by screwing the internal thread structure of the 2nd receiving member 12 to the external thread structure of the rear-end outer peripheral surface of the attaching part 50.

As shown in FIG. 4A, the second receiving member 12 has a bottomed cap shape that opens to the front side, and the bottom surface on the rear end side is a receiving surface that receives the other end of the second elastic body 11. In the center of the bottom surface, a through hole 12a is formed into which the rear end of the urging force transmission member 90 is inserted.
The inner diameter of the through hole 12a is slightly larger than the outer diameter of the rear end side of the biasing force transmission member 90 to such an extent that the rear end side of the biasing force transmission member 90 can be inserted.
Therefore, as shown in FIG. 4B, when the second receiving member 12 is disposed so as to cover the rear end side of the biasing force transmission member 90, the rear end of the biasing force transmission member 90 is the through hole 12a. It can be located inside.

  Here, paying attention to the urging force transmission member 90 shown in FIG. 4B, the outer periphery of the urging force transmission member 90 has a large outer diameter on the front end side, and the rear end side has an outer diameter through the step surface 90e. It is formed to be smaller by one step.

  As described above, the inner diameter of the through hole 12a provided in the center of the bottom surface of the second receiving member 12 is only slightly larger than the outer diameter of the rear end side of the biasing force transmission member 90, and the biasing force transmission member Since the inner diameter is substantially equal to the outer diameter of the rear end side of 90, as will be described later, when the biasing force transmitting member 90 moves to the rear end side against the biasing force of the second elastic body 11. The urging force transmission member 90 can move to the rear end side only until the step surface 90e of the urging force transmission member 90 contacts the bottom surface of the second receiving member 12.

  That is, the step surface 90e that connects the portion having the large outer diameter on the front end side and the portion having the small outer diameter on the rear end side of the biasing force transmission member 90 regulates the movement distance to the rear end side of the biasing force transmission member 90. Part.

  And as above-mentioned, since the 2nd receiving member 12 is attached by screwing together with the attaching part 50, if the screwing amount of the 2nd receiving member 12 is changed, the attachment position of the 2nd receiving member 12 will be changed. Since it can be adjusted in the front-rear direction, the distance between the stepped surface 90e of the urging force transmitting member 90 and the bottom surface of the second receiving member 12 in the state shown in FIG. Therefore, the moving distance to the rear end side of the urging force transmission member 90 can be adjusted.

  Finally, the moving member 9 is made to face the rear end 4b of the needle 4 through the through hole 90c of the biasing force transmitting member 90 and the through hole 6b of the first receiving member 6 from the rear end side of the second receiving member 12. Next, the moving member 9 is attached to the urging force transmission member 90.

  Specifically, a female screw structure is formed on the inner peripheral surface of the through-hole 90c of the urging force transmission member 90, while a male screw structure is formed on the outer peripheral surface of the moving member 9. The moving member 9 can be attached to the urging force transmission member 90 by screwing the male screw structure of the member 9 into the female screw structure of the urging force transmission member 90.

  As described in the first embodiment, the operator pulls only the separation distance between the distal end 9a serving as the contact portion of the moving member 9 that contacts the rear end 4b of the needle 4 and the rear end 4b of the needle 4. When the gold 3 is pulled, the rear end 4b and the front end 9a come into contact with each other, and the feeling at the time of contact is transmitted to the finger pulling the trigger 3, so that the operator feels that the trigger 3 has been pulled to the half-open position. Recognize.

  Also in the second embodiment, the moving member 9 is attached to the urging force transmitting member 90 by screw connection, so that the position of the moving member 9 can be adjusted in the front-rear direction by changing the screwing amount. Therefore, in the second embodiment as well, as described in the first embodiment, the amount of screwing of the moving member 9 with respect to the urging force transmission member 90 is changed to move more than the state shown in FIG. The member 9 is positioned rearward or frontward so that the amount of liquid ejected at the time of half-opening can be adjusted.

  By the way, since the urging force transmission member 90 is urged forward by the urging force of the second elastic body, the urging force transmission member 90 is difficult to rotate in the rotation direction. When adjusting the amount of screwing, it may rotate with the moving member 9 in some cases.

Then, when the moving member 9 is rotated in order to change the screwing amount, the urging force transmitting member 90 rotates together, making it difficult to adjust the screwing amount.
In order to prevent this from happening, in this embodiment, as described above, the cross-sectional shape of the large-diameter portion 50b of the mounting portion 50 is a hexagon, and the outer shape of the flange portion 90d of the urging force transmission member 90 is a hexagon. Thus, a rotation prohibiting mechanism that prohibits the rotation of the urging force transmission member 90 is configured.

  However, the anti-rotation mechanism is not limited to the polygonal shape of the cross-sectional shape of the large-diameter portion 50b of the mounting portion 50 and the polygonal outer shape of the outer diameter of the flange portion 90d. .

  For example, the anti-rotation mechanism is realized such that a convex portion protruding from the flange portion 90d is provided on the flange portion 90d, and a groove extending in the front-rear direction for receiving and guiding the convex portion is provided on the large-diameter portion 50b of the mounting portion 50. The rotation prevention mechanism is not particularly limited as long as it allows sliding in the front-rear direction while prohibiting rotation of the urging force transmission member 90.

The operation of the spray gun 1 of the second embodiment configured as described above will be described with reference to FIG.
5A corresponds to FIG. 3A, FIG. 5B corresponds to FIG. 3B, and FIG. 5C corresponds to FIG. 3C. FIG.

  Specifically, FIG. 5A shows a state before the trigger 3 is pulled, that is, the needle 4 is biased toward the liquid jet port by the first elastic body 5, and the needle 4 closes the liquid jet port. It shows when it is in a state.

  Further, the moving member 9 is urged toward the needle 4 side by the second elastic body 11 through the urging force transmission member 90, but in the state before the trigger 3 shown in FIG. Since the front end surface of the urging force transmission member 90 abuts against the tip surface of the large diameter portion 50b of the mounting portion 50, the movement of the moving member 9 to the needle 4 side is further restricted, which is the first embodiment. Similarly, the tip 9a of the moving member 9 serving as a contact surface that contacts the rear end 4b of the needle 4 is separated by a predetermined distance.

  Then, when the trigger 3 is pulled against the urging force of the first elastic body 5 and the needle 4 moves toward the moving member 9 by an amount corresponding to the separation distance, as shown in FIG. The rear end 4b and the front end 9a of the moving member 9 come into contact with each other, and the feel at that time is transmitted to the finger pulling the trigger 3, so that the operator can move the half-open position as described in the first embodiment. Can be perceived sensuously.

As described in the first embodiment, the separation distance corresponds to the pulling amount of the trigger 3 until the half-open position is recognized. Therefore, by adjusting the separation distance, the half-open position is recognized. The pulling amount of the trigger 3 can be changed.
That is, by adjusting the separation distance, it is possible to adjust the application range (spreading range of the atomized liquid) of the atomized liquid when half-opened.

  As described above, the moving member 9 is screwed and connected to the urging force transmission member 90. Therefore, by adjusting the screwing amount of the moving member 9 with respect to the urging force transmission member 90, FIG. It is possible to position the moving member 9 on the front side or on the rear side than in the state shown.

For this reason, it is possible to adjust the separation distance between the front end 9a of the moving member 9 which becomes a contact surface that contacts the rear end 4b of the needle 4 by the screwing amount of the moving member 9 with respect to the urging force transmitting member 90. It has become.
Therefore, in the second embodiment, as in the first embodiment, the application range of the atomized liquid during half-opening can be adjusted.

  When the trigger 3 is continuously pulled from the half-open state shown in FIG. 5B, the moving member 9 moves following the urging force of the needle 4 while resisting the urging force of the second elastic body 11. At this time, the urging force transmitting member 90 connected to the moving member 9 also moves following the urging of the needle 4, and the step surface 90 e of the urging force transmitting member 90 contacts the bottom surface of the second receiving member 12. Further, the trigger 3 cannot be pulled, and at this time, the application range (spreading range) of the atomized liquid becomes maximum (see FIG. 5C).

  That is, the step surface 90e formed as a portion connecting the portion with the large outer diameter on the front end side and the portion with the small outer diameter on the rear end side of the urging force transmission member 90 abuts on the bottom surface of the second receiving member 12. Thus, the moving amount of the moving member 9 is restricted so that the moving member 9 does not move any further.

  Further, the maximum moving distance of the needle 4 is such that the stepped surface 90e of the biasing force transmitting member 90 contacts the bottom surface of the second receiving member 12 from the state where the trigger 3 is not pulled, and the needle 4 cannot move any more. Therefore, this distance changes when the position of the second receiving member 12 moves back and forth.

As described above, since the second receiving member 12 is screwed to the mounting portion 50, the position of the second receiving member 12 can be changed by changing the screwing amount of the second receiving member 12 with respect to the mounting portion 50. Can be adjusted in the front-rear direction.
Accordingly, similarly to the first embodiment, the maximum movement distance of the needle 4 can be adjusted. In the second embodiment, the maximum movement distance of the needle 4 is the second receiving member 12 with respect to the mounting portion 50. It can be adjusted by the amount of screwing.
As described above, the second embodiment can realize the same operation as that of the first embodiment.

Incidentally, the second embodiment is a more compact version of the first embodiment, and FIG. 6 shows a diagram in which the sizes can be compared.
The upper diagram of FIG. 6 is a diagram corresponding to FIG. 3A of the first embodiment, and the lower diagram is a diagram corresponding to FIG. 5A of the second embodiment.

As shown in FIG. 6, with reference to the position where the mounting portion 50 at the rear end of the spray gun 1 is provided as a reference, in the first embodiment, a structural portion provided for causing the operator to sensuously recognize the half-open position. In the second embodiment, the length is 40 mm, and the length can be reduced by 30 mm.
Thus, the spray gun 1 which is more compact and easier to handle in the second embodiment can be realized.

  In the description of the second embodiment, there are parts that have already been described in the first embodiment, but there are parts that are omitted from the description. Naturally, in implementing the second embodiment, It goes without saying that the same configuration as that of the first embodiment may be applied to the second embodiment for portions that do not cause a problem.

  In addition, the present invention has been specifically described through the first embodiment and the second embodiment, but the present invention is not limited to the state of the specific embodiment, and the above embodiment is described. It is obvious to those skilled in the art that various modifications or improvements can be made, and it is within the scope of the present invention to include such modified or improved embodiments within the technical scope of the present invention. It is clear from the description.

DESCRIPTION OF SYMBOLS 1 Spray gun 2 Nozzle 2a Liquid spout 3 Trigger 4 Needle 4a Flange part 4b Rear end 5 1st elastic body 6 1st receiving member 6a Receiving surface 6b Through-hole 6c Male screw structure 7 Liquid supply port 8 Clearance 9 Moving member 9a Tip (contact part)
9b Flange portion 9c Rear end 10 Housing member 11 Second elastic body 12 Second receiving member 12a Through hole 20 Air valve 21 Location in the middle of air flow path 22 Air supply port 23 Front end 24 of air flow path Overall air adjustment knob 30 Air Cap 31 Air outlet 32 Pattern adjustment air outlet 40 Pattern air adjustment knob 41 Air adjustment needle 50 Mounting portion 50a Small diameter portion 50b Large diameter portion 90 Biasing force transmission member 90a Receiving hole portion 90b Rear end surface 90c Through hole 90d Flange portion 90e Stepped surface

Claims (12)

A needle that moves by a trigger operation and opens and closes a liquid outlet at the tip of the nozzle;
A first elastic body for urging the needle toward the liquid jet port;
A moving member which is arranged on the rear end side of the needle and moves following the urging force of the needle to a position where the needle is stopped;
A second elastic body that urges the moving member toward the needle,
In a state where the needle closes the liquid jet port, a contact portion that contacts the rear end of the needle of the moving member is disposed so as to be separated from the rear end of the needle by a predetermined distance. A spray gun characterized by   The spray gun according to claim 1, wherein the first elastic body and the second elastic body have different spring constants.   The spray gun according to claim 1 or 2, wherein the first elastic body has a smaller spring constant than the second elastic body.   The spray gun according to any one of claims 1 to 3, wherein the predetermined distance is half or less of a maximum movement distance of the needle. A flange portion provided on the needle and receiving one end of the first elastic body made of a coil spring;
A through hole is disposed on the rear end side of the needle and receives the other end of the first elastic body that is mounted so as to cover the needle, and also a contact portion of the moving member is disposed on the needle side. A first receiving member;
A flange portion provided on the moving member and receiving one end of the second elastic body made of a coil spring;
An accommodation member that accommodates the moving member that is disposed on the rear end side of the first receiving member and has a restriction portion that receives the flange portion of the moving member and restricts the movement of the moving member toward the needle. When,
The other end of the second elastic body that is disposed on the rear end side of the housing member and is mounted so as to cover the moving member is received and the rear end of the moving member abuts to regulate the movement amount of the moving member. The spray gun according to any one of claims 1 to 4, further comprising a second receiving member. The housing member is attached by screwing to the rear end side of the first receiving member,
The spray gun according to claim 5, wherein the predetermined distance is adjustable by a screwing amount of the housing member to the first receiving member. The second receiving member is attached by screwing to the rear end side of the housing member,
The spray gun according to claim 5 or 6, wherein a maximum moving distance of the needle is adjustable by an amount of screwing of the second receiving member with respect to the housing member. A flange portion provided on the needle and receiving one end of the first elastic body made of a coil spring;
A through hole is disposed on the rear end side of the needle and receives the other end of the first elastic body that is mounted so as to cover the needle, and also a contact portion of the moving member is disposed on the needle side. A first receiving member;
It is arranged so as to cover the first receiving member, receives one end of the second elastic body at the flange portion on the outer periphery of the front end, and biases the moving member toward the needle side by the biasing force of the second elastic body. An urging force transmission member connected to the moving member;
A second receiver having a bottom surface that is disposed so as to cover the rear end side of the urging force transmission member and has a through hole for receiving the other end of the second elastic body and inserting the rear end of the urging force transmission member. A member,
An attachment portion provided on the rear end side of the spray gun that receives the front end surface of the urging force transmission member and restricts the movement of the moving member toward the needle and is connected to the second receiving member. ,
The biasing force transmission member has a step surface that connects a portion having a large outer diameter on the front end side and a portion having a small outer diameter on the rear end side,
The spray gun according to any one of claims 1 to 4, wherein the moving amount of the moving member is regulated by the step surface coming into contact with the bottom surface of the second receiving member. The urging force transmission member has a through hole for arranging the contact portion of the moving member on the needle side,
The moving member is screwed into the through hole of the biasing force transmitting member;
The spray gun according to claim 8, wherein the predetermined distance is adjustable by a screwing amount of the moving member with respect to the biasing force transmitting member. The second receiving member is screwed to the attachment portion,
The spray gun according to claim 8 or 9, wherein a maximum movement distance of the needle is adjustable by a screwing amount of the second receiving member with respect to the mounting portion. A needle that moves by a trigger operation and opens and closes a liquid outlet at the tip of the nozzle;
A first elastic body comprising a coil spring mounted to cover the needle and biasing the needle toward the liquid ejection port;
A flange portion provided on the needle and receiving one end of the first elastic body;
A moving member that is disposed on the rear end side of the needle and has a contact portion that contacts the rear end of the needle that moves following the urging force of the needle to a position where the needle is stopped;
A first receiving member that is disposed on the rear end side of the needle, receives the other end of the first elastic body, and has a through hole for disposing a contact portion of the moving member on the needle side;
A second elastic body, which is mounted so as to cover the moving member, and comprises a coil spring that biases the moving member toward the needle;
A flange portion provided on the moving member and receiving one end of the second elastic body;
An accommodation member that accommodates the moving member that is disposed on the rear end side of the first receiving member and has a restriction portion that receives the flange portion of the moving member and restricts the movement of the moving member toward the needle. When,
A second receiving member that is disposed on the rear end side of the housing member, receives the other end of the second elastic body, contacts the rear end of the moving member, and regulates the amount of movement of the moving member;
In a state where the needle closes the liquid jet port, a contact portion that contacts the rear end of the needle of the moving member is disposed so as to be separated from the rear end of the needle by a predetermined distance. A spray gun characterized by A needle that has a flange portion, moves by a trigger operation, and opens and closes a liquid outlet at the tip of the nozzle;
A moving member that has a contact portion that contacts the rear end of the needle and moves to follow the urging force of the needle to a position that is disposed on the rear end side of the needle and stops the needle;
A first elastic body comprising a coil spring mounted so as to cover the needle until one end abuts against the flange portion of the needle, and biasing the needle toward the liquid jet port;
A through hole is disposed on the rear end side of the needle so as to cover the first elastic body, receives the other end of the first elastic body, and arranges a contact portion of the moving member on the needle side. A first receiving member;
A through hole for screwing and connecting the moving member and a flange portion provided at the outer periphery of the front end so as to cover the first receiving member, and a contact portion of the moving member is arranged on the needle side An urging force transmission member;
The coil spring is mounted so as to cover the biasing force transmission member until one end abuts against the flange portion of the biasing force transmission member, and biases the moving member toward the needle via the biasing force transmission member. A second elastic body;
A second receiver having a bottom surface that is disposed so as to cover the rear end side of the urging force transmission member and has a through hole for receiving the other end of the second elastic body and inserting the rear end of the urging force transmission member. A member,
An attachment portion provided on the rear end side of the spray gun that receives the front end surface of the urging force transmission member and restricts the movement of the moving member toward the needle side and the second receiving member is screwed and connected; With
The urging force transmission member has a stepped surface for restricting the amount of movement of the moving member by contacting the bottom surface of the second receiving member, a portion having a large outer diameter on the front end side and an outer diameter on the rear end side. Is formed as a part connecting the small part,
The maximum moving distance of the needle can be adjusted by the screwing amount of the second receiving member with respect to the mounting portion, and the moving member abutting portion in a state where the needle closes the liquid jet port; The spray gun characterized in that the distance between the rear end of the needle can be adjusted by the screwing amount of the moving member with respect to the biasing force transmitting member.

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