JPH10146548A - Trigger type liquid jetting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a liquid from leaking out of a nozzle hole and a nozzle head from coming out due to an erroneous trigger operation. SOLUTION: In the case a nozzle head 8 is rotated relative to the nozzle installation cylinder 7 in the situation that joining elements 21 are projected side-outward directly or indirectly out of a part of an outer face of the nozzle head 8 and that a trigger 5 is positioned at the front limit, a part of the joining elements 21 are joined to joining parts 24 formed on an upper part of the trigger 5 in a freely detachable manner and in their joined state, a plunger 6 is made unable to move backward by pulling the trigger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a trigger type liquid ejector.

[0002]

2. Description of the Related Art A liquid ejector shown in FIG. 11 is known. The ejector raises a vertical cylinder 2a from the upper part of the mounting cylinder 2 fitted to the outer surface of the mouth and neck of the container body, and projects the injection cylinder 3 forward from the upper end of the vertical cylinder. The plunger 6 is fitted forward by urging the plunger 6 into the cylinder 4 protruding forward from the vertical cylinder, and the plunger front end is engaged with the upper rear surface of the trigger. The liquid in the cylinder is ejected from the nozzle hole 10 of the nozzle head 8 fitted to the front end of the injection cylinder 3 via the nozzle head mounting cylinder 7 by pulling the trigger, and the plunger 6 advances to release the trigger 5 by releasing the trigger. It is provided so that the liquid in the container is sucked into the cylinder at this time.

Reference numeral 13 denotes an impingement plate which covers the front surface of the nozzle head so as to be openable and closable. When the liquid is sprayed in the plate-covered state, the sprayed liquid collides with the perforated portion at the center of the plate and is sprayed and ejected. It is provided as follows.

In the above-mentioned trigger type liquid ejector, since the liquid is ejected even if the trigger is pulled by mischief, the liquid ejection path 11 is connected to the nozzle head mounting cylinder fitted to the front end of the injection cylinder and the nozzle head. When the first half and the second half are provided and the nozzle head is rotated with respect to the nozzle head mounting cylinder, the communication of the liquid discharge path is interrupted, and the liquid can be ejected unless the nozzle head is returned to the original position. It is formed impossible.

[0005]

As described above, even in the liquid ejector provided so as to open and close the liquid discharge path by rotating the nozzle head with respect to the nozzle head mounting cylinder, the liquid discharge path remains closed. If you often pull the trigger with
When the trigger is bent or elastically restored, the plunger retreats or moves forward a little, and then the discharge valve and the nozzle head mounting cylinder and the like are formed through the discharge valve due to abnormally high pressure in the cylinder. In some cases, the high-pressure liquid accumulates in the front portion of the injection cylinder between the liquid discharge path and the nozzle head. When the nozzle head is turned to the liquid discharge path communication position, the high-pressure liquid accumulates in the front portion of the injection cylinder. If the high-pressure liquid is ejected from the nozzle hole regardless of the trigger operation, or if the trigger is strongly pulled, the high pressure in the injection cylinder may cause the nozzle head to come off from the nozzle fitting cylinder. Was.

According to the present invention, an engaging member is provided to project outward or outward from a part of the outer surface of the nozzle head 8 directly or indirectly, and the trigger 5 is positioned at the front end. When the nozzle head 8 is rotated to the liquid discharge path closing position, a part of the engaging member protruding outward from the nozzle head 8 is detachably engaged with the engaging portion provided on the upper portion of the trigger 5. Thus, in the engaged state, the plunger is provided so as not to be retracted at all even if the trigger is bent by the pulling operation, so as to solve the above-mentioned drawback.

[0007]

As a first means, a vertical cylinder 2a is erected from the inside of a mounting cylinder 2 to be fitted to the mouth and neck of a container body, and an injection cylinder 3 is inserted from an upper end of the vertical cylinder to an intermediate part. , The front end of the plunger 6 fitted with the cylinder 4 projecting forward and biasing forward into the cylinder is engaged with the upper rear surface of the trigger 5 which is swingably suspended from the front of the injection cylinder. By the pulling operation of the trigger, the liquid in the container is sucked up and the nozzle hole 10 of the nozzle head 8 rotatably fitted to the front outer surface of the nozzle head mounting cylinder 7 fitted to the front end of the injection cylinder. In the trigger type liquid ejector provided to be able to eject,

[0008] The engaging members 21, 32, 41, 53, 62, 6 are directed outwardly or directly from a part of the outer surface of the nozzle head 8.
3, 72, 73, and 83 are protruded, and the nozzle 5 is attached to the nozzle head mounting cylinder 7 with the trigger 5 positioned at the front end.
When the is rotated, a part of the engaging element is removably engaged with the engaging portions 24, 35, 44, 55, 65, 75, 85 provided on the upper portion of the trigger 5, and is in the engaged state. As a result, the retraction of the plunger 6 due to the pulling of the trigger is made impossible.

As a second means, the first means is provided, and an engaging plate is projected from the rear end of the peripheral wall 15 of the nozzle head 8 to form an engaging element 21. Also, a front projection is provided on the front surface of the upper part of the trigger 5. The upper protruding plate 23 is erected through the plate 22 to form a small gap with the front surface of the trigger to form the engaging portion 24.

As a third means, there is provided an engaging plate having the above-mentioned first means and having a semicircular front end at the rear end of the peripheral wall 15 of the nozzle head 8 via a laterally outwardly extending plate 31. A front protruding plate 33 is attached to the upper front surface of the trigger 5, and a semicircular curved plate 34, which is open rearward, is opened from the upper surface of the front of the trigger 5,
The inner surface of the curved plate was used as the engaging portion 35.

As a fourth means, the above-mentioned first means is provided, and a first engaging plate is projected from a rear end portion of the peripheral wall 15 of the nozzle head 8 to form engaging elements 41, 41. From the front end of the upper surface of the upward step 42
And a small gap is formed between itself and the front surface of the trigger to form the engaging portion 44.

As a fifth means, the above-mentioned first means is provided, and the first engaging plate 52 is projected rearward from a part of the peripheral wall 15 of the nozzle head 8 via a projecting plate portion 51 projecting outward and outward. The upper surface is formed as an engaging element 53, and the second engaging plate 54 is formed so as to protrude forward from the upper surface of the trigger 5 and the lower surface is formed as an engaging portion 55.

As a sixth means, the above-mentioned first means is provided, and an overhang plate is provided from the rear end of the peripheral wall 15 of the nozzle head 8.
61, projecting in parallel from the outer end of the overhanging plate in a U-shape in a side view, the two clamping plates project to form engaging elements 62 and 63. A lateral groove 64 having a side opening is formed, and a part of the front wall of the trigger is made to hang down from the upper wall of the lateral groove to form an engaging portion 65, and an engaging portion is provided between the engaging members 62 and 63.
65 is provided so as to be fittable.

As a seventh means, the above-mentioned first means is provided, and an overhang plate is provided from the rear end of the peripheral wall 15 of the nozzle head 8.
The two holding plates protrude in parallel from the outer end of the overhanging plate in a U-shape as viewed from the outside, and the engaging members 72, 73
Also, a through hole 74 is formed in the upper side plate portion of the trigger 5, and a trigger front wall portion in front of the through hole is formed as an engaging portion 75,
An engaging portion 75 is provided between the engaging members 72 and 73 so as to be fittable.

Eighth means is an engaging cylinder having the first means and having a large diameter rear portion from the tip of the arm 81 projecting outwardly from a part of the peripheral wall 15 of the nozzle head 8.
82, the large-diameter portion is formed as an engaging element 83, and a lateral groove 84 which is widened in the front and side openings is formed in the upper front wall portion of the trigger. Was formed as an engaging portion 85.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A trigger type liquid ejector 1 of a generally used type will be described with reference to FIG. 11. The liquid ejector 1 is, as is well known, an outer surface of the mouth and neck of a container body. The vertical cylinder 2a is erected from the upper part of the mounting cylinder 2 to be screwed, the injection cylinder 3 is projected forward from the upper end of the vertical cylinder, and the cylinder 4 is projected forward from the front surface of the middle part of the vertical cylinder. The upper end is pivotally attached using a pin or the like, and the trigger 5 is vertically suspended obliquely downward. Further, the front end of the plunger 6 fitted into the cylinder 4 by being urged forward by a coil spring or the like is fitted to the trigger 5. The cylinder is engaged with the upper rear surface, the liquid in the cylinder is ejected through the injection cylinder by the trigger pulling operation, and the liquid in the container is sucked into the cylinder by the negative pressure in the cylinder by the return of the trigger.

A nozzle head 8 is fitted to the front of the injection cylinder 3 via a nozzle head mounting cylinder 7 as in the case of FIG.
A liquid discharge passage 11 communicating with a nozzle hole 10 formed in the center of the front wall 9 is formed. The liquid discharge path extends from the outer surface of a valve rod 7b protruding forward from the center of the substrate 7a of the nozzle head mounting cylinder 7 and the center of the front wall 9 of the nozzle head 8 as shown in the figure.
A fitting cylinder that is fitted to the outer surface of the valve rod 7b in a watertight manner and protrudes rearward.
Formed with 12 inner surfaces. That is, the first discharge passage 11a is formed in the rear inner surface of the fitting tube in the cylinder direction, and the second discharge passage 11b is formed in the front outer surface of the valve rod 7b in the generatrix direction.
When the nozzle head 8 is rotated with respect to the nozzle head mounting cylinder 7 from the communication state indicated by 1, the first discharge path 11a
When the nozzle head 8 is moved to another position and the communication with the second discharge path 11b is interrupted and the nozzle head 8 is returned to the original position, the nozzle head 8 communicates again as shown in FIG.

It should be noted that there may be a nozzle structure in which the nozzle head 8 is fitted and fixed to the nozzle head mounting cylinder 7 and the liquid discharge path 11 is always open, without the function of opening and closing the liquid discharge path by the rotation of the nozzle head. . Reference numeral 13 denotes a collision plate which covers the front surface of the nozzle head so as to be freely opened and closed. Furthermore, in consideration of aesthetics and handleability, in the illustrated example, the vertical cylinder 3, the cylinder 4, and the injection cylinder 3 are surrounded by a cover 14 integrally formed with them, but, of course, such a cover is not provided. Is also good. The configuration described above is conventionally known.

In the following, the present invention will be described. Directly or indirectly from a part of the outer surface of the nozzle head 8
That is, for example, in a state in which the engaging element protrudes outward and outward from a part of the outer surface of the not-shown covering cylinder portion which is non-rotatably fitted to the nozzle head peripheral wall 15 and the trigger 5 is located at the front end, When the nozzle head 8 is rotated with respect to the nozzle head mounting cylinder 7, a part of the engaging element detachably engages with an engaging portion provided on the upper portion of the trigger 5. Is formed such that the retraction of the plunger 6 due to the pulling of the trigger is impossible.

The shape, quantity, and installation position of the engaging element and the engaging portion can be variously changed. 1 shows a partial side view, and FIG. 2 shows a partial front view. One of the nozzle heads 8 in which the peripheral wall 15 is formed into a triangular prism shape having an R-shaped ridge without the cover plate 13 is shown. From the rear end of the ridge, an engaging plate is protruded outward and outward to form an engaging element 21, and an upper protruding plate 23 is erected on a front surface of the upper portion of the trigger 5 via a front overhanging plate 22,
An engaging portion 24 is formed by forming a small gap with the front surface of the trigger, and the engaging member 21 is fitted into the engaging portion, and the engaging member 21 front surface is engaged with the rear surface of the upper protruding plate 23, so that the trigger pull is performed. The retraction of the plunger 6 due to the approach is impossible.

In the second embodiment shown in FIG. 3, a laterally outwardly extending plate 31 is formed from a rear end portion of the peripheral wall 15 of the nozzle head 8 in the circumferential direction.
An engaging plate 32 whose front end is semicircular in side view is protruded forward to form an engaging element 32, and a front overhanging plate 33 is attached to the upper front surface of the trigger 5, and an opening is opened rearward from the upper surface of the plate front. The curved plate 34 having a semicircular shape in a side view is raised, the inner surface of the curved plate is used as an engagement portion 35, and the front end of the engaging element 32 is engaged with the surface, whereby the retreat of the plunger 6 due to the pulling of the trigger can be prevented. It is impossible.

FIG. 4 shows an engagement state between the engagement element and the engagement portion, and FIG.
In a third embodiment showing these engaged and disengaged states, the peripheral wall 15 is
From the rear ends of the two ridges of the nozzle head 8 formed into a triangular prism shape with chamfered ridges, first engaging plates are protruded outward and outward to form engaging elements 41, 41, and the upper surface of the trigger 5 The second engaging plate 43 is erected from the front end of the upper surface of the upward step portion 42 provided at the upper portion, and a small gap is formed between the second engaging plate 43 and the front surface of the trigger.
One engaging element 41 fits into the engaging portion, and the engaging element 41
By engaging the front surface with the rear surface of the second engagement plate 43, the retraction of the plunger 6 due to the pulling of the trigger is disabled.

In the fourth embodiment shown in FIG. 6, the first engaging plate 52 is extended from a part in the circumferential direction of the central part in the front-rear direction of the peripheral wall 15 of the nozzle head via a projecting plate part 51 protruding outward. The upper surface is used as an engaging element 53, and the second engaging plate 54 is protruded forward from the upper front surface of the trigger 5, and the lower surface thereof is used as an engaging portion 55.
The engagement of the engagement portion 55 with the engagement element 53 prevents the retraction of the plunger 6 due to the pulling of the trigger.

A fifth embodiment shown in FIG. 7 is a method in which a projecting plate extends outward from the rear end of a portion of the circumferential wall 15 of the nozzle head 8 in the circumferential direction.
61, projecting from the outer end of the overhanging plate, in parallel to each other in a side view, in the form of a U-shape, the two holding plates connected to each other at the bottom, and the engaging plates 62 and 63 are projected to form the engaging members 62 and 63; In the front wall portion, a lateral groove 64 of the front and side openings is formed, and a part of the trigger front wall is suspended from the upper wall of the lateral groove to form an engaging portion 65, and the engaging portion 65 is provided between the engaging members 62 and 63. Are provided so that the plunger 6 can be retracted by pulling the trigger in the fitted state. The lateral groove 64 can be opened on one or both sides of the upper part of the trigger.

A sixth embodiment shown in FIG. 8 is a method in which a projecting plate extends outward from the rear end of a part of the circumferential wall 15 of the nozzle head 8 in the circumferential direction.
Projecting 71, from the outer end of the overhanging plate, seeing from the outside, in a U-shape, two parallel, near one side are connected to each other, and the clamping plates are projected to form the engaging elements 72, 73. In addition, a through hole 74 is formed in the upper side plate portion of the trigger 5, a front wall portion of the trigger in front of the through hole is used as an engaging portion 75, and an engaging portion is provided between the holding plates so as to be fittable. In the combined state, the retraction of the plunger 6 due to the pulling of the trigger is disabled.

FIG. 9 shows the disengaged state of the engaging element and the engaging portion, FIG.
In a seventh mode in which these engagement states are shown at 0, the rear portion has a large-diameter portion from the tip end of the arm 81 that projects outward from the rear end portion of a part of the circumferential wall 15 of the nozzle head 8 in the circumferential direction. , A solid or hollow engagement cylinder 82 is protruded rearward, and the large-diameter portion is
In the upper front wall portion of the trigger, a lateral groove 84 which is widened inside the front and side openings is bored, and the widened portion is used as an engaging portion 85, and an engaging element 83 is provided in the engaging portion 85. In the fitted state, it is impossible to retract the plunger 6 due to the pulling of the trigger.

In the embodiment shown in FIG. 1 to FIG. 10, the number and positions of the engaging elements are not limited to the illustrated examples, but can be variously changed.
With the rotation of the nozzle head 10, the engaging element is engaged with the engaging portion in a state where the liquid discharge path 11 is closed, and these are engaged and disengaged in a state where the liquid discharge path 11 is opened. Incidentally, FIG.
As shown in the example, in order to secure the rotating space of the engaging element and achieve close engagement, the engaging element and / or the engaging portion are engaged in an aspect other than the example of FIG. It is desirable to bend and curve in the direction of rotation in accordance with the rotation space of the splicer.

[0028]

According to the present invention, the vertical cylinder 2a is provided from the inside of the mounting cylinder 2 to be fitted to the mouth and neck of the container body.
And projecting the injection cylinder 3 from the upper end of the vertical cylinder and the cylinder 4 from the middle part, respectively, and the front end of the plunger 6 fitted by being urged forward into the cylinder,
A nozzle head mounting cylinder engaged with the upper rear surface of a trigger 5 which is swingably vertically suspended from the front of the injection cylinder and which draws up the liquid in the container and fits on the front end of the injection cylinder by pulling operation of the trigger. In a trigger type liquid ejector provided so as to be capable of ejecting from a nozzle hole 10 of a nozzle head 8 rotatably fitted to a front outer surface of a nozzle head 7, a part or the outer surface of the nozzle head 8 is directly or indirectly laterally outward. Hooks 21, 32, 41, 53, 62, 6
3, 72, 73, and 83 are protruded, and the nozzle 5 is attached to the nozzle head mounting cylinder 7 with the trigger 5 positioned at the front end.
When the is rotated, a part of the engaging element is removably engaged with the engaging portions 24, 35, 44, 55, 65, 75, 85 provided on the upper portion of the trigger 5, and is in the engaged state. In other words, since the retraction of the plunger 6 due to the pulling of the trigger is made impossible, even if the lower portion of the trigger is bent at the time of pulling the trigger as in the case of the above-described conventional example, the plunger 6 is located immediately in front of the plunger 6. Since the upper part of the trigger 5 engaged with the front end itself engages with the nozzle head and cannot be pulled, there is no danger that the plunger will retreat, and liquid leakage from the nozzle hole can be completely prevented. .

[Brief description of the drawings]

FIG. 1 is a partial side view of an example of a liquid ejector according to the present invention.

FIG. 2 is a partial front view of the ejector of FIG. 1;

FIG. 3 is a partial side view of another example of the liquid ejector of the present invention.

FIG. 4 shows the upper part of the trigger and the engaging element in cross section,
It is a partial side view of other examples of the liquid ejector of the present invention.

5 is a perspective view of the ejector of FIG. 4 in which an engagement element and an engagement portion are disengaged.

FIG. 6 is a partial side view of another example of the liquid ejector of the present invention.

FIG. 7 shows a cross section of the upper part of the trigger and the engaging element,
It is a partial side view of other examples of the liquid ejector of the present invention.

FIG. 8 is a cross-sectional view of the upper part of the trigger and the engaging element.
It is a partial side view of other examples of the liquid ejector of the present invention.

FIG. 9 is a perspective view of another example of the liquid ejector of the present invention.

10 is a perspective view of the ejector in FIG. 9 in which an engagement element and an engagement portion are engaged.

FIG. 11 is a cross-sectional view of a conventional liquid ejector.

[Explanation of symbols]

4 ... Injection cylinder 5 ... Trigger 6
… Plunger 8… nozzle head 15… peripheral wall 21, 32, 41, 53, 62, 63, 72, 73, 83… engagement element 24, 35, 44, 55, 65, 75, 85… engagement part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeo Iizuka 3-6, Yoshishima, Oshima, Koto-ku, Tokyo Inside (72) Inventor Takamitsu Nozawa 3-2-2, Oshima, Koto-ku, Tokyo Nokono Factory

Claims (8)

[Claims] 1. A vertical cylinder 2a is erected from the inside of a mounting cylinder 2 to be fitted to the mouth and neck of a container body, and an injection cylinder 3 is positioned from an upper end of the vertical cylinder.
And an upper portion of a trigger 5 having a plunger 6 having a front end protruding forward from the middle of the injection cylinder and having a front end portion of a plunger 6 fitted to the cylinder by being urged forward into the cylinder. A nozzle head 8 engaged with the rear surface and rotatably fitted to the front outer surface of a nozzle head mounting tube 7 which sucks up the liquid in the container and fits the front end of the injection tube by pulling operation of the trigger. In the trigger type liquid ejector provided so as to be able to eject from the nozzle hole 10, the engaging elements 21, 32, 41, 53, 62, 63, 72 are directly or indirectly directed from a part of the outer surface of the nozzle head 8. , 73,
When the nozzle head 8 is rotated with respect to the nozzle head mounting cylinder 7 in a state in which the trigger 83 is protruded and the trigger 5 is positioned at the front end, a part of the engaging element is provided on the trigger 5 Two
4, 35, 44, 55, 65, 75, 85 detachably engaged with the plunger 6 in such an engaged state that the retracting of the plunger 6 by pulling the trigger is impossible. Liquid ejector. 2. An engaging plate protrudes from the rear end of the peripheral wall 15 of the nozzle head 8 to form an engaging element 21, and an upper protruding plate 23 is erected on the upper front surface of the trigger 5 via a front extending plate 22.
2. The trigger type liquid ejector according to claim 1, wherein a small gap is formed between the trigger and the front surface of the trigger to form the engaging portion. 3. An engaging plate having a front end portion having a semicircular shape in a side view is protruded forward from a rear end portion of the peripheral wall 15 of the nozzle head 8 via a laterally extending plate 31 to form an engaging element 32. A front extension plate 33 is attached to the upper front surface of the trigger 5, and from the upper surface of the plate front portion,
2. The trigger-type liquid ejector according to claim 1, wherein a curved plate having a semicircular shape in a side view, which is opened rearward, is erected, and an inner surface of the curved plate serves as an engaging portion. 4. The nozzle head 8 has a first peripheral wall 15 from a rear end thereof.
An engaging plate is protruded to form engaging elements 41, 41, and a second engaging plate 43 is erected from the front end of the upper surface of the upward step portion 42 provided on the upper front surface of the trigger 5, so that a small gap is formed between the second engaging plate 43 and the front surface of the trigger. 2. A trigger type liquid ejector according to claim 1, wherein said trigger portion is formed as an engaging portion. 5. A first engaging plate 52 is protruded rearward from a part of the peripheral wall 15 of the nozzle head 8 via a projecting plate portion 51 projecting outward and outward, and an upper surface thereof is formed as an engaging element 53, Also trigger 5
2. The trigger type liquid ejector according to claim 1, wherein a second engaging plate is protruded forward from an upper front surface, and a lower surface thereof serves as an engaging portion. 6. An engaging member that projects an overhanging plate 61 from the rear end of the peripheral wall 15 of the nozzle head 8, and projects two holding plates in parallel from the outer end of the overhanging plate in a U-shape when viewed from the side. 62, 63
A lateral groove 64 having front and side openings is formed in a front wall portion of the trigger 5, and a part of the front wall of the trigger is suspended from the upper wall of the lateral groove to form an engaging portion 65. 2. A trigger type liquid ejector according to claim 1, wherein an engagement portion is provided so as to be fitted between said first and second members. 7. An overhanging plate 71 protrudes from the rear end of the peripheral wall 15 of the nozzle head 8, and two holding plates project in parallel from the outer end of the overhanging plate in a U-shape as viewed from the outside. Handle 7
2 and 73, and a through hole 74 is formed in the upper side plate portion of the trigger 5, a front wall portion of the trigger in front of the through hole is formed as an engaging portion 75, and an engaging portion is provided between the engaging members 72 and 73. 2. The trigger-type liquid ejector according to claim 1, wherein 75 is provided so as to be fittable. 8. An engagement cylinder 82 having a large-diameter rear portion protruding rearward from a distal end of an arm 81 protruding outwardly from a part of the peripheral wall 15 of the nozzle head 8, and engaging the large-diameter portion. A lateral groove 84, which is widened inside the front and side openings, is formed in an upper front wall portion of the trigger, and the widened portion is formed as an engaging portion 85. Item 3. A trigger type liquid ejector according to Item 1.