JPH10156235A - Trigger type ejector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of members and to miniaturize a cylider by providing the return spring fixed to a main pillar cylinder at one end thereof and engaged with a trigger at the other end thereof and-energizing the trigger when drawn near and integrally molding a main body member, an inner cylinder, the trigger, a plunger, an emitting valve member and the return spring from a synthetic resin material. SOLUTION: Return springs E are positioned on both sides of an injection cylinder 3 to be arranged mutually parallel and consist of one set of springs 61, connection parts 62 and rings 63. The return springs E are fixed by engaging the connection parts 62 with the upper part of a trigger C and fitting the rings 63 to the outer surface of the upper end of a main pillar cylinder 10. A main body part A, an inner cylinder B, the trigger C, a plunger D, return springs E and a cover 66 are integrally molded from a synthetic resin material. Since the return springs E are arranged to the outside of the cylinder 4, the cylinder 4 can be miniaturized. Since the main body member A, the return springs E or the like are integrally molded from the synthetic resin material, a structure is simple and the number of members can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a trigger type ejector.

[0002]

2. Description of the Related Art For example, as disclosed in JP-A-8-196958,
The main cylinder is erected from the upper part of the mounting cylinder to be fitted to the outer surface of the mouth and neck of the container body, and the injection cylinder protrudes forward from the upper end of the main cylinder, and is pivotally attached to the front of the injection cylinder to drop the trigger. The plunger is biased forward and fitted into the cylinder protruding forward from the column cylinder, the front end of the plunger is engaged with the upper rear surface of the trigger, and the liquid in the cylinder is pulled to the front end of the injection cylinder by pulling the trigger. When the trigger is released, the plunger moves forward and the inside of the cylinder becomes negative pressure and the trigger returns. Trigger-type ejectors provided to be sucked into a well are well known.

[0003]

However, in this type of conventional trigger type ejector, a coil spring is provided inside a cylinder, and the plunger is urged in the outward direction by the coil spring to push the plunger or trigger. There are the following problems because the system is to be restored. First, since the substantial volume of the cylinder is reduced by the coil spring, the cylinder becomes large and the efficiency deteriorates in order to secure a predetermined substantial volume. Second, the flow of liquid in the cylinder is obstructed by the coil spring. Third, when the plunger is inserted into the cylinder, assembly is not easy because the spring force of the coil spring acts in the direction opposite to the direction in which the plunger is inserted. Fourth, metal coil springs were used as coil springs, and the other members were made of synthetic resin. Therefore, in order to reuse materials, separate them into metal springs and other members made of synthetic resin and dispose of them. Although it is necessary, the separation is difficult. Fifth, the conventional ejector requires a relatively large number of members due to its relatively complicated structure, resulting in high cost. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has a structure in which a trigger return spring is provided outside a cylinder, and the return spring is formed of a synthetic resin material. It is an object of the present invention to provide a trigger type ejector capable of reducing the number of components, eliminating metal members, reducing the size of a cylinder, and facilitating assembly.

[Means for Solving the Problems]

As a first means, a main column cylinder 10 whose upper surface is closed is erected from the upper end of the peripheral wall 6 of the mounting cylinder 2 through an inward flange-like top wall 9 to be fitted to the mouth and neck portion 1 of the container body. The main cylinder
The injection cylinder 3 from the upper part and the cylinder 4 sharing the lower cylindrical wall from the middle part to the inward flange-shaped top wall 9 are fixed to the main body member A projecting forward and into the main column cylinder 10 so as not to fall off. In the middle part in the vertical direction, there is a partition wall 23 for partitioning the inside up and down. The inner cylinder B from which the raising pipe 26 is suspended and the injection cylinder 3
And a trigger C which swings down from the front of the cylinder 4 via the first rotating shaft 39 so as to freely slidably protrude forward from the cylinder 4 and has a large outer diameter at the rear end and a trigger at the front end. C
A plunger D pivotally mounted on the upper part, and the cylinder bottom wall 47
Is formed in the tongue-shaped valve plate 57 by forming a C-shaped separating line 56, and the valve plate 57 is formed.
And a valve hole formed in a common wall 45 of the lower cylinder wall of the cylinder 4 and the inward flanged top wall 9.
46, an outside air introduction valve Y to the inside of the container body, which is opened when the plunger D is located at or near the rear end, and an inward flange formed at the upper part of the inner cylinder B. Annular contact portion 30 that can freely contact the valve seat 28 made of
, A fixed plate 27 fitted in the upper end of the inner cylinder B, and the annular contact portion 30 which is integrally connected to each of the fixed plate 27 and the valve body 29 and presses the annular contact portion 30 against the valve seat 28. A discharge valve member X having a spring portion 31 constantly biased in the direction, one end fixed to the upper end of the main column cylinder 10, the other end engaged with the upper portion of the trigger C, and a curved portion 60 between both ends. An elastically deformable return spring E that elastically deforms when the trigger is pulled and urges the trigger C in the forward direction. The main body member A, the inner cylinder B, the trigger C, the plunger D, and the discharge valve member X are provided. Each of the return spring E and the return spring E were integrally formed of a synthetic resin material.

As the second means, the first means is provided, and the return spring E is composed of a pair of elongated springs 61 having substantially the same shape and connected in parallel to each other.

As a third means, there is provided the first or second means, and a foldable stopper 42 whose tip is freely engageable with the peripheral wall 6 of the mounting cylinder 2 is rotatable at the lower end of the trigger C. Attached to.

As a fourth means, there is provided the first, second or third means, and the engagement means which is pushed from above into engagement with the engagement claws 35, 36 provided on the upper surface of the injection cylinder 3 to engage therewith. plywood
There is provided a cover 66 having a 67 on the inner surface of the top wall and covering both side surfaces, the upper surface, and the rear surface of the main body member A.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the trigger type ejector according to the first to fourth aspects of the present invention.

A is a main body member, which is formed of a mounting cylinder 2, an injection cylinder 3, a cylinder 4, and a guide cylinder 5, and is fitted from the upper end of the peripheral wall 6 of the mounting cylinder 2 to be fitted to the container body neck portion 1. ,
The main cylinder 10 whose upper surface is closed is erected through the inward flanged top wall 9, and the lower end of the main cylinder 10 is further extended downward to fit the main cylinder 10.
12 and the upper end of the peripheral wall 6 is reduced in diameter to reduce the diameter of the reduced diameter portion 8.
To form The injection cylinder 3 protrudes forward from the upper part of the main column cylinder 10, and a nozzle fitting cylinder part 33 for fitting a nozzle head 38 having a nozzle hole 37 at the front end thereof is formed. The first engaging claw 35 is projected and the first
A second engaging claw 36, which forms a cover 66 attaching means described later together with the engaging claw 35, protrudes from the middle of the injection cylinder 3 in the front-rear direction so as to face the first engaging claw 35. In addition, the cylinder 4 which shares the lower cylindrical wall from the middle part of the main column cylinder 10 to the inward flanged top wall 9.
The guide cylinder 5 is further projected forward in the center of the cylinder, and a valve hole 46 for an outside air introduction valve Y, which will be described later, is formed in the common wall 45 of the lower cylinder wall of the cylinder 4 and the inward flanged top wall 9. Drilling. Further, a part of the cylinder bottom wall 47 is formed to be thin, and the thin portion is formed with a C-shaped separating line 56 to form a tongue-shaped valve plate 57 for a suction valve Z described later,
A third discharge hole 58 communicating with the first discharge hole 25 is formed in the cylinder bottom wall 47.

Reference numeral B denotes an inner cylinder fixed so as not to fall into the main column cylinder 10, and a partition wall 23 for vertically partitioning the inside at an intermediate portion in the vertical direction.
A second discharge hole which has a valve hole 24 in the lower cylinder portion of the partition wall and a first discharge hole 25 in the upper cylinder portion of the partition wall and is located above the first discharge hole 25 and communicates with the injection cylinder 3. 32. Further, the inner cylinder B has a concentric cylinder wall 14 closed on the lower surface for fitting the fitting cylinder 12 on the outer peripheral surface of the lower end thereof, and an eccentric cylinder wall 16 closed on the upper surface for fitting on the reduced diameter portion 8. Further, the inner cylinder B hangs the suction pipe 26 from the lower end of the cylinder. The eccentric cylinder wall 16 is connected to the container body mouth and neck 1 through packing.
It has an outward flange 21 pressed against the upper surface, and has a communication groove 19 communicating with the valve hole 46 and a communication hole 20 communicating with the communication groove 19 on the top wall. The valve body 29 of the discharge valve member X inserted into the upper cylinder of the partition wall of the inner cylinder B has a valve seat formed of an inward flange formed in a cylinder portion between the first discharge hole 25 and the second discharge hole 32. 28 has an annular contact portion 30 capable of contacting liquid-tight from above, and is seated by a spring portion 31 integrally connected to a fixed plate 27 fitted into the upper end of the inner cylinder B and the upper surface of the valve body 29. Always biased in the direction. The spring portion 31 is formed by opposing two strips with a small gap therebetween and providing a constricted portion at an intermediate portion, and is made of an elastically deformable material.

Reference numeral C denotes a U-shaped cross-section trigger, which hangs down from the front of the injection cylinder 3 via a first rotating shaft 39 so as to be swingable. The trigger C has a folding stopper 42 pivotally attached to the lower end of a front wall 41 thereof. The foldable stopper 42 has a U-shaped cross section, and the protrusion 43 protruding from the lower end of the bottom wall is formed on the peripheral wall 6.
A pair of elastically deformable holding pieces 44 protruding from the lower end of the front surface of
It can be pinched.

D is a plunger, which has a guide slot 5 into which the guide cylinder 5 is inserted, and which has a guide elongated hole 49 at the rear end face opening on the axis line, protrudes slidably forward from inside the cylinder 4, and has a large outer diameter at the rear end. At the same time, the front end is pivotally connected to a second rotation shaft 55 penetrating the upper side walls of the trigger C.

Reference symbol E denotes a return spring, which is a pair of elongated members having substantially the same shape and located on both sides of the injection cylinder 3 and arranged in parallel with each other and having a curved portion in the vertical direction, as shown in FIG. , A connecting portion 62 extending left and right to connect the front ends of the springs 61 to each other, and a ring 63 connecting the rear ends of the springs 61 to each other.
Consists of The return spring E engages the connecting portion 62 with the upper portion of the trigger C, and fixes the ring 63 by fitting the ring 63 to the outer surface of the upper end of the main cylinder 10. When the ring 63 is fixed, when the ring 63 is pushed into the upper end of the main column tube 10, since these are molded from an elastically deformable synthetic resin material as described later, the annular shape formed on the inner peripheral surface of the ring 63. Groove 64
An annular projection 65 formed on the outer peripheral surface of the main cylinder 10 is engaged with the ring 63, and the front lower surface of the ring 63 is formed on the upper surface of the injection cylinder 3 and the rear lower surface is formed on the upper end of the main cylinder 10. Each abuts against the arcuate shoulder 59.

Z is a suction valve, which is formed by a valve hole 24 formed in the lower cylinder portion of the inner cylinder B at the partition wall and a tongue-shaped valve plate 57 formed in the cylinder bottom wall 47.

Y is an outside air introduction valve into the container body, which is a common wall 45 between the lower cylinder wall of the cylinder 4 and the inward flange-like top wall 9.
And a plunger D that opens and closes the valve hole 46 when sliding in the cylinder.
Is opened at or near the rear end.

X is a discharge valve member, which is formed of a valve body 29, a valve seat 28 and a spring portion 31 inserted into the inner cylinder B.

Reference numeral 66 denotes a cover for covering both side surfaces, the upper surface, and the rear surface of the main body member A, and has a pair of engagement plates 67 projecting downward from the inner surface of the top wall. When the cover 66 is pushed in from above the main body member A when the cover 66 is mounted, since the cover 66 is molded from an elastically deformable hook-shaped synthetic resin material as described later, a pair of engaging plates 67 And the first engagement claw 35 and the second engagement claw 36 formed on the injection cylinder 3 are elastically deformed outward, whereby a pair of engagement plates 67 are connected to the two engagement claws 35. , 36 When the cover 66 is further pushed in, the engagement plate 67 and the first engagement and second engagement claws
35 and 36 are restored to their original shapes and engaged with each other.

The cover 66 further protrudes downward and obliquely rearward from the upper end of the rear surface thereof, and has a lower back pressing plate 68 whose lower end forms a pressing portion for pressing the back of the hand. Are connected to each other.

The body member A, the inner cylinder B, the trigger C,
Each of the plunger D, the return spring E, and the cover 66 are integrally formed of a synthetic resin material.

Next, the operation of the present embodiment will be described.
In use, the engagement of the foldable stopper 42 at the horizontal position in FIG. 1 with the peripheral wall 6 is released, and the foldable stopper 42 is rotated counterclockwise in FIG.
Fold to the position shown by the dashed line.

Next, when the trigger C is pulled rearward against the urging force of the return spring E, the pressure in the cylinder 4 is increased because the plunger D moves rearward with this. The high-pressure liquid is supplied from the third discharge hole 58 and the first discharge hole 25 to the inner cylinder B.
Discharge inside. The high-pressure liquid that has flowed into the inner cylinder B is
The valve body 29 is pushed upward against the urging force of the valve member to be separated from the valve seat.

When the discharge valve member X is opened, the high-pressure liquid in the inner cylinder B is discharged from the second discharge hole 32 into the injection cylinder 3, and
Further, it is jetted out of the injection cylinder 3 through the nozzle hole 37. On the other hand, when the plunger D further moves rearward and reaches near the rear end, the valve hole 46 starts to open, and when the rear end is reached, the valve hole 46 is completely opened.

When the trigger C is released after the appropriate amount of ejection, the trigger C starts swinging forward by the urging force of the return spring E, and the plunger D also starts moving forward.
Then, the pressure in the cylinder 4 becomes negative, so that the tongue-shaped valve plate 57
Is separated from the valve hole 24, and the suction valve 2 is opened. The liquid in the container is sucked into the cylinder 4 through the suction pipe 26 by the pressure difference.

On the other hand, when the plunger D starts to move forward, the valve hole 46 is in an open state, and the inside of the container is made negative by suction of the liquid. Through the container. Further, when the plunger D moves forward and reaches the front end, the inside of the cylinder 4 is filled with liquid, and the tongue-shaped single valve plate 57 closes the valve hole 24.
At this point, the trigger C has returned to its original position.

When the ejection is completed, the foldable stopper 42 is rotated clockwise in FIG. 1 to engage the distal end thereof with the peripheral wall 6. As a result, the rearward pulling of the trigger C becomes impossible.

[0026]

According to the first and second aspects of the present invention, since the return spring for returning the trigger is disposed outside the cylinder, the actual volume of the cylinder is not reduced by the coil spring as in the prior art. Therefore, it is possible to reduce the size of the cylinder without lowering the efficiency. Further, since the flow of the liquid in the cylinder is not hindered by the coil spring, the swing of the trigger and the ejection and suction of the liquid are smooth. Further, when the plunger is inserted into the cylinder as in the prior art, the spring force of the coil spring does not act in the direction opposite to the direction in which the plunger is inserted, thus facilitating assembly. Furthermore, since a spring made of a synthetic resin material is used as the return spring, there is no need to separate and dispose of the metal spring and other members made of synthetic resin as in the related art, and the labor for separation can be saved. Furthermore, since each of the main body member, the inner cylinder, the trigger, the plunger, and the return spring is integrally formed of a synthetic resin material, the structure is simple and the number of members can be reduced.

According to the third aspect of the present invention, the foldable stopper is provided at the base of the trigger, and the tip of the foldable stopper is freely engageable with the peripheral wall of the mounting tubular member and is used only for the locking operation. Locking can be reliably performed, and there is no possibility that a lock operation is mistaken for another operation.

According to the fourth aspect of the present invention, since the cover has an engaging plate on the inner surface of the top wall which is pushed into and engaged from above with the engaging protruding piece provided on the upper surface of the injection cylinder, the cover is attached when the cover is mounted. It is only necessary to push the cover from above the main body member, so that the cover can be easily and quickly mounted.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a trigger type ejector according to the present invention.

FIG. 2 is also a perspective view of a return spring.

[Explanation of symbols]

A: body member B: inner cylinder C: trigger D: plunger E: return spring X: discharge valve member Y: outside air introduction valve Z: suction valve

Claims (4)

[Claims] 1. A mounting cylinder 2 fitted to a mouth 1 of a container body.
From the upper end of the peripheral wall 6 through the inward flanged top wall 9, the main cylinder 10 having an upper surface closed is erected, the injection cylinder 3 is formed from the upper part of the main cylinder 10, and the lower cylinder wall is formed from the middle part by the inward flange. The cylinder 4 shared with the top wall 9 has a main body member A projecting forward, and a partition wall 23 which is fixed so as not to fall out into the main cylinder 10 and which vertically partitions the inside at the middle part in the vertical direction. An inner cylinder B having a valve hole 24 in the lower cylinder part of the bulkhead and a first discharge hole 25 in the upper cylinder part of the bulkhead, and further having a suction pipe 26 suspended from the lower end of the cylinder, and a front part of the injection cylinder 3 A trigger C which swings down via a first rotating shaft 39; and a forwardly slidably protruding from inside the cylinder 4; a rear end portion having a large outer diameter; The plunger D attached and a part of the cylinder bottom wall 47 are formed to be thin and Is formed on the tongue-shaped valve plate 57 by forming a C-shaped separating line 56, and the suction valve Z formed by the valve plate 57 and the valve hole 24.
A valve hole 46 is formed in the common wall 45 of the lower cylindrical wall of the cylinder 4 and the inward flange-like top wall 9 so that the valve is opened when the plunger D is located at or near the rear end. An outside air introduction valve Y into the container body, a valve body 29 having an annular contact portion 30 that can be liquid-tightly contacted from above with a valve seat 28 formed of an inward flange formed at an upper portion of the inner cylinder B, Fixed plate 27 fitted in the upper end of inner cylinder B
A discharge valve member X having a spring portion 31 integrally connected to the fixed plate 27 and the valve body 29 and constantly biasing the annular contact portion 30 in a direction of pressing the valve seat 28, The other end is fixed to the upper end of the cylinder 10 and the trigger C
And a return spring E that is elastically deformable when the trigger is drawn and elastically deforms to urge the trigger C in the forward direction. , Inner cylinder B, trigger C, plunger D,
A trigger type ejector, wherein each of the discharge valve member X and the return spring E is integrally formed of a synthetic resin material. 2. The trigger type ejector according to claim 1, wherein said return spring E comprises a pair of elongated elongated springs 61 having substantially the same shape and connected in parallel with each other. 3. The trigger according to claim 1, wherein a foldable stopper having a tip end engageable with the peripheral wall of the mounting cylinder is rotatably attached to a lower end of the trigger. Type ejector. 4. An engaging claw 3 erected on the upper surface of the injection cylinder 3.
A cover (66) for covering both side surfaces, an upper surface, and a rear surface of the main body member (A) having an engagement plate (67) on the inner surface of the top wall which is pressed into and engaged with the upper and lower members (5, 36).
Or the trigger type ejector according to 3.