JPS58143863A - Dispenser - Google Patents

Abstract

PURPOSE:To prevent the outflow of a liquid positively caused by inversion or the like of the container during transportation, exhibition, etc., by providing a sealing means to the dispenser where the liquid in a vessel is let flow out by the sliding motion of a piston in a manner such that the communication between the interior and the outerior of the vessel at the descending position of the piston is intercepted by the sealing means. CONSTITUTION:The dispenser 10 moves up and down a piston 14 in a cylinder 12 integrally with a head 38 and decompresses or pressurizes the interior of the cylinder 12 to let a liquid in a vessel 29 flow out. A cap 26 is attached to the mouth part of the vessel 29 at the upper end of the cylinder 12, and the dispenser 10 is fixed to the vessel 29. Hence the cap 26 is equipped with an annular engaging click 30, and the head 38 is equipped with a skirt seal 40 as a sealing means at the outer surface of its lower end part. The head 38 is liquid-tightly engaged with the inner surface of the hole 32 of the cap 26 at the descending position of the piston 14. On the other hand, a bottomed tubular virgin plastic seal 42 formed as an integrated body with the head 38 peelably on use is provided, an engaging click 50 on an inner surface at the lower end part of its side wall is engaged with the click 30 of the cap 26, and the piston 14 is locked at its descending position.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dispenser that sucks up liquid such as insecticide, coating liquid, etc. stored in a container into a cylinder by sliding a piston and flows out by applying pressure.

(Generally, this type of dispenser is equipped with a locking means for locking the piston in its lowered position, and is transported or displayed at a store with the piston locked in the lowered position.)Therefore, this type of dispenser is With the piston locked in the lowered position, the disc 4
It is necessary to prevent the liquid inside the container from leaking out even if the container is tipped over or turned upside down.This invention was developed in view of this point, and the liquid that may be caused by falling over during transportation, display, etc. The objective is to provide a dispenser that reliably prevents the outflow of.

In order to achieve the above object, the disk sensor of the present invention includes: a cylinder; a piston that is disposed in the cylinder so as to be able to rise and fall; the piston rises to create a negative pressure inside the cylinder; and the piston moves downward to pressurize the inside of the cylinder; A head attached to the upper end of the piston that moves up and down integrally with the dispensing piston, a cap attached to the mouth of a container containing liquid to fix the dispenser to the container, and a cap that locks the piston in its lowered position. The head includes a sealing means that fluid-tightly engages the inner surface of the cap in the lowered position of the piston to interrupt communication between the inside of the container and the outside.

Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, the dispenser 10 includes a stepped cylinder 12, within which a piston 14 is disposed so as to be movable up and down.

The piston 14 is provided with skirt-like seals 16' and 1B at its lower end and middle part, respectively, and the skirt-like seal 1
6 is slidable along the small diameter portion of the cylinder 12, and the skirt-like seal 18 is slidable along the large diameter portion of the cylinder.

Here, the skirt-shaped seal 18 acts as a seal for preventing negative pressure. The piston 14 also includes a flow path 19 formed coaxially with the piston, and this flow path has a variable space 2 defined by the movable piston and the fixed cylinder 12.
Connected to 0. A ball valve 22 constituting a primary valve is disposed below the cylinder 12. This ball valve 22 is regulated from detachment by a square presser 23. cylinder 12
Negative pressure holes 24 are formed at the lower end of the 0-large diameter portion at intervals of four narrow cylinders along the circumferential surface of the cylinder. And cylinder 1
A character f26 is fitted to the upper end of the 2, and a suction pipe 27 is fitted to the lower end. The cap 26 has a female threaded portion 28 on its inner peripheral surface, and is screwed into the opening (not shown) of a container 29 containing a liquid, such as an insecticide. By attaching cap 26 to container 29, dispenser 10 is secured to the container. The attachment of the cap 26 to the container 29 is not limited to screw-fitting, but may also be press-fitting, for example. Screw-fitting has the advantage that the container can be replaced easily, while press-fitting has the advantage that processing of the cap is easy. be. Also,
The cap 26 includes an annular engagement pawl 30 formed coaxially with the cylinder 12 and extending upwardly. Furthermore, the character 7″26 has a bottomed hole 32,
A through hole 35 is formed at the bottom of this hole. The piston 14 passes through this through hole 35 and extends upward.

Here, the piston 14 is urged upward by a compression coil spring 36 disposed within the cylinder 12 and rises until the skirt seal 18 abuts the cap 26.

Further, a head 38 having a nozzle 37 is attached to the upper end of the piston 14, and moves up and down integrally with the piston. The head 38 is provided with a skirt-shaped seal 40 serving as a sealing means on the outer circumferential surface of its lower end, and this skirt-shaped seal 40 slides on the inner circumferential surface of the hole 32 of the cap 26. The head 38 and the piston 14 then descend until the lower end of the head abuts the bottom surface of the hole 32. Here, as shown in FIGS. 1 and 2, an air introduction groove 34 extending in the axial direction of the hole 32 is provided on the inner peripheral surface of the hole 32.
is formed. The air introduction groove 34 extends upward from the middle part of the inner peripheral surface 5 of the hole 32, and is not formed at the lower end of the inner peripheral surface. Therefore, the position shown in FIG. 1 where the lower end of the head 38 is in contact with the bottom surface of the hole 32,
In the lowered position of the pawl piston 14, the skirt seal 40 is in fluid-tight engagement with the inner peripheral surface of the bore 32.

As shown in FIGS. 1 and 3, the dispenser 10
The head 38 is provided with a plastic virgin seal 42 which is a cylinder with a bottom and is integrally molded with the head 38. This virgin seal 42 constitutes a locking means, and has a series of notches 4 formed at equal intervals along the circumferential direction on the bottom surface of the bottomed cylinder.
4, and a peeling groove 46 communicating with one of the notches and extending vertically across the side wall of the bottomed cylinder. Here, the notch 44 is formed in the orientation direction 1c'9 in consideration of the orientation of the silastic. Further, the virgin seal 42 includes a protrusion 48 formed protruding from the side wall of the bottomed cylinder adjacent to the peeling groove 46, and by pulling this protrusion in the direction of the arrow, the p-vernon seal is inserted into the notch 44. - It can be easily peeled off from the head 38 by being broken along the line. As can be clearly seen from FIG. 1, the virgin seal 42 also has an engaging claw 50 on the inner peripheral surface of the lower end of the side wall of the bottomed cylinder.
The engaging claw 50 is engaged with the engaging claw 30 of the cap 26. This causes the piston 14 to move to the first position.
Locked in the lowered position shown.

A valve stem 52 is disposed in a flow path 19 formed in the piston 14 so as to be movable up and down. The valve stem 52 Fi, which acts as a secondary valve by cutting off communication between the flow path 19 and the outside, also has a lower end that connects the ball valve 22 to the variable space 20 and the suction pipe when the piston is in the lowered position as shown. 27 is pressed in the direction of cutting off communication with 27. valve stem 5
2, as shown in FIG. 2, is formed to have a cross-shaped cross section except for its upper end. Therefore, the liquid can flow smoothly even within the flow path 19.

As shown in FIG. 1, the dispenser 10 configured in this way has a piston 1
4 is transported or displayed at a store while being locked in its lowered position.

In this state, the lower end of the valve rod 52 presses the ball valve 22 in a direction that blocks communication between the variable space 20 and the suction pipe 27. Therefore, even if the dispenser 10 is overturned or turned upside down, the liquid in the container 29 will not flow out from the nozzle 37 via the suction pipe 27 and the flow path 19. 1, when the piston 14 is in the lowered position, the skirt seal 4 of the head 38
It is liquid-tightly engaged with the inner peripheral surface of the 0td hole 32. Therefore, even if the dispenser 10 is overturned or turned upside down, the liquid in the container 29 will not flow out of the dispenser via the negative pressure hole 24 and the through hole 35.

Then, the consumer who purchased the dispenser 10
As shown in the figure, the protrusion 48 of the virgin seal is pulled in the direction of the arrow to peel off the virgin seal from the head 38. As a result, the lock of the piston 14 is released, and the piston is moved by the biasing force of the compression coil spring 36 to the ciscart-like seal 1.
8 rises until it comes into contact with the cap 26, and the dispenser 10 is set in a usable state.

Next, the operation of the dispenser 10 will be schematically explained. As the piston 14 rises from the state shown in FIG. 1, the total volume of the variable space 20 gradually increases. Here, as the piston rises, the shoulder portion 54 of the valve rod 52 comes into contact with the upper end of the piston, cutting off communication between the flow path 19 and the outside.

As the volume of the variable space 20 increases, the pressure inside the variable space gradually becomes negative, and the ball valve 22 is pulled upward by the suction force generated within the variable space. Therefore, the liquid in the container 29 flows into the variable space 20 via the suction pipe 27, and preparation for the outflow process is completed. Note that as the liquid in the container 29 flows into the variable space 20, the inside of the container becomes negative pressure. However, since the air introduction groove 34 is formed on the inner surface of the hole 32 of the cap 26, the liquid-tight engagement between the skirt 9-shaped seal 40 and the inner surface of the hole 32 is released due to the rise of the piston 14. , the air introduction groove, and the negative pressure hole 24 into the container 29 . Therefore, negative pressure inside the container 29 is prevented, and the liquid is reliably flowed into the variable space 20.

Thereafter, when the head 38 is pressed and the piston 14 is lowered against the biasing force of the compression coil spring 36, the variable space 20
The total volume of the variable space decreases and the liquid within the variable space becomes pressurized. Then, the pressure of the liquid in the variable space 20 is gradually increased, and this pressurized liquid pushes up the valve rod 52 to allow communication between the variable space 19 and the outside. Here, the ball valve 22 is pressed downward by the pressurized liquid and blocks communication between the variable space 20 and the suction pipe 17. Therefore, the pressurized liquid in the variable space 20 is discharged from the outlet hole of the nozzle 37 via the flow path 19. In addition, nozzle 3
It goes without saying that the dispenser 10 can also be used as a sprayer or foamer by installing a spinner or foaming means in the outlet hole 7, and the term "dispenser" is used to include sprayers and foamers as well.

As described above in detail, the dispenser of the present invention includes a cylinder, a piston that is disposed in the cylinder so as to be able to rise and fall, and that rises to create a negative pressure in the cylinder and descends to pressurize the cylinder; A head that is attached to the upper end of the piston and moves up and down integrally with the piston, a cap that is attached to the mouth of a container that stores liquid and fixes the dispenser to the container, and a cap that locks the piston in its lowered position. and locking means.

The head has a sealing means that liquid-tightly engages with the inner surface of the cap in the lowered position of the piston to cut off communication between the inside of the container and the outside. Therefore, the dispenser of this invention can cut off communication between the inside of the container and the outside by locking the piston in its lowered position, and even if the dispenser is tipped over or turned upside down in this state, the inside of the container remains intact. The liquid will not leak outside.

Therefore, in the dispenser of the present invention, by locking the piston in its lowered position, it is possible to reliably prevent liquid from flowing out due to falling during transportation or display.

The above-mentioned embodiments are merely for explaining the present invention and are not intended to limit the scope of the present invention, and any modifications or alterations made within the technical scope of the present invention are also included in the present invention. That goes without saying for you. For example, the virgin seal may be formed to be breakable in the axial direction in consideration of the orientation of the plastic, and the locking means is not limited to the virgin seal, for example, a retaining protrusion may be formed on the head, It is also possible to form a locking surface # on the cap that can be engaged with this locking protrusion at the lowered position of the piston.The lifting and lowering movement of the piston is not limited to the vertical direction, but also includes reciprocating movement in the horizontal direction. 1. Also, the sealing means engages the inner surface of the cap and the liquid in the lowered position of the piston, and the sealing means is not limited to a skirt-like seal, but may be attached to the outer peripheral surface of the lower end of the head. It may also be a rubber ring.

Furthermore, in order to prevent negative pressure in one container, an air introduction groove is formed on the inner circumferential surface of the hole in the cap. Air may be introduced into the container by deforming the shaped seal.

[Brief explanation of drawings]

Figures 1 to 3 show a dispenser according to an embodiment of the present invention, and Figure m1 is a longitudinal sectional view of the dispenser;
FIG. 2 is a cross-sectional view taken along the line ■--■ in FIG. 1, and FIG. 3 is a perspective view of the head and virgin seal. 10...Dispenser, 12...Cylinder, -t-shaped seal, 42...Virgin seal. Applicant's agent Patent attorney Takehiko Suzue 13- Figure 1 / 8 7 44 44.42 ノ10■30■ (-□" \゛52 2 / Ma\729 44 J'l: 111 3' 2

Claims (1)

[Claims] A cylinder, a piston that is disposed in the cylinder so as to be able to rise and fall and which creates negative pressure inside the cylinder by rising and pressurizes the inside of the cylinder by falling, and a piston which is attached to the upper end of the piston and moves up and down integrally with the piston. , a cap that is attached to the mouth of a container containing a liquid to fix the dispenser to the container, and a locking means that locks the piston in its lowered position. A dispenser having a sealing means that liquid-tightly engages with the inner surface to connect the inside of the container to the outside.