JP4672132B2 - Spray delay device for spray - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spray delay device for spraying, which is attached to a nozzle stem of a spray can and is pushed down and locked together with the stem at the time of spraying, and starts spraying after a predetermined time has elapsed.
[0002]
[Prior art]
In particular, when disinfecting, disinfecting, or disinfecting treatment by spraying a large amount of disinfectant, disinfectant, or insecticide over the unattended room over a predetermined time, the worker is exposed to the disinfectant during that processing time. In order to protect it from being lost, it must be evacuated outside for a predetermined time. A spray can equipped with a delay injection device of the type in which the injection is started after waiting for the time required for the evacuation immediately after the operator operates the injection device has been conventionally known from Japanese Patent Laid-Open No. 9-25509. It is where it is done.
[0003]
In this type of aerosol injector, as a means for initiating injection after a predetermined period of time that can be saved by the operator after the valve has been operated, water is present between the injection orifice on the valve side and the valve stem of the spray can. A push button combined cap is set in a state where it can be injected by pushing down the valve stem in advance, and then a liquid such as water is injected into the water injection portion opened at the upper end of the cap. A structure in which actual injection is started by impregnating this liquid into a water-soluble disintegrant from above and gradually disintegrating it, and forming a passage between the valve stem and the injection orifice after a predetermined time has elapsed. It is.
[0004]
[Problems to be solved by the invention]
In such a prior art, since the injection delay time depends on the disintegration time of the water-soluble disintegrant and the gas pressure in the spray can, it is difficult to obtain a constant and accurate delay time. In particular, when a large number of spray cans are used simultaneously in one place, it is essential to set the injection delay time accurately. Of course, even when one spray can is used at one place, such accuracy must be sufficiently secured in consideration of the time allowance for the user to retreat from the place. Moreover, when the disintegrant is dissolved, the residue or fragments may be scattered to the surroundings by the actual jet gas pressure, and the use environment may be contaminated. At the same time, if the contents to be ejected are harmful to the human body, this situation must be avoided. Therefore, in order to solve such a problem in the conventional delayed injection spray device, the present invention can obtain a stable and accurate delay time with a simple configuration regardless of a change in gas pressure due to a temperature change in the use environment. At the same time, the object is to provide a safe and clean spray delay device for sprays of the type that does not use a disintegrant.
[0005]
[Means for Solving the Problems]
According to the present invention, in the spray delay device for a spray having the above-described structure, the delay device presses the shoulder cover that is locked to the spray can, and simultaneously presses down the nozzle stem during spraying. A cylindrical nozzle main body having a nozzle hole at the upper end portion to be engaged and held, and a lower end portion and an outflow hole which are integrally fitted and fixed in the main body and simultaneously engage with the nozzle stem are formed. A lower portion having a gas storage chamber defined by an upper end portion where the peripheral wall and the guide passage are opened, and a piston having an opening at the upper end surface and biased downward along the longitudinal axis are slid. A cylindrical body comprising an upper portion with an annular recess for movably accommodating, and is slidably attached to the outer peripheral surface of the cylindrical body along the longitudinal axis; and The cylindrical portion covers the outflow hole and the A cylindrical control member having a bottomed cylindrical shape that defines a gas passage communicating with the nozzle hole between the inner surface of the main body and the guide passage, and the guide passage includes an upper end surface of the cylindrical body, the cylindrical control member, In order to define an injection control space between the piston and the central portion of the piston along the longitudinal axis, and a small amount of gas in the gas storage chamber in the guide passage prior to injection. In the guide passage between the micro-regulator and the gas storage chamber is provided. A push-down member for restricting and closing the gas flow path from the storage chamber is disposed so as to be movable in the axial direction, and is restricted by the push-down member between the lower part of the cylindrical body and the piston. Buffer the pressure of the gas through the guide passage For this reason, the leakage of gas from the guide passage to the injection control space raises the lower end of the control member at the same time as raising the cylindrical control member. This is achieved by opening the outflow hole, causing the gas in the gas storage chamber to be ejected from the nozzle through the gas passage, and the push-down member to close the guide passage.
[0006]
In the injection delay device having the above-described configuration according to the present invention, a series of delayed injection operations are started by first pressing the nozzle body downward and engaging and holding it with the shoulder cover locked to the spray can. That is, the nozzle stem of the spray can is opened and the gaseous content is filled into the gas storage chamber. The gas in the storage chamber flows into the guide passage while being restricted by the annular flow path defined by the outer peripheral surface of the push-down member, and then flows into the pressure adjustment chamber and resists the downward biasing force. Push the piston up. Then, this gas flow is gradually sent to the injection control space through the guide passage through the minute adjustment body, and brings the cylindrical control member to the raised position. As a result, the outflow hole formed in the peripheral wall of the lower portion of the cylindrical body is opened by the rise of the cylindrical control member, and the pressurized gas in the storage chamber is sent to the nozzle through the gas passage. From this, the injection of the gasified liquid is started. In that case, in order to maintain the injection work, the pressure in the injection control space must be kept constant during that time, so that the gas inflow from the gas storage chamber to the guide passage is positioned at the upper limit position by the gas pressure. It is stopped by being brought to.
[0007]
In the above-described configuration of the injection delay device according to the present invention, the minute adjustment body provided in the inner passage sets an injection delay time which is a time required for the gas to flow into the injection control space, and appropriately adjusts its permeability. The delay time can be changed by selecting. On the other hand, the gas flow rate per unit time that passes through the micro-adjustment body is stabilized in consideration of the gas pressure setting in the manufacturing process, the temperature at the time of use, and the change in gas pressure in the spray can caused by the change. In order to achieve this, a pressure adjusting chamber with a variable volume is provided in the guide passage. By buffering the change in the gas pressure flowing into the guide passage, the gas pressure during delayed injection is stabilized, and the delay time is further reduced. Accuracy is ensured. Further, the guide passage is blocked by the push-down member and the gas pressure in the adjustment chamber is kept constant, so that the cylindrical control member is stably held at the raised position and the outflow hole is kept open.
[0008]
According to one embodiment of the injection delay device according to the present invention, the piston is hermetically fitted into the cylindrical body, and is biased downward by the air pressure in the cylindrical body. With this configuration, since the pressure adjusting chamber does not apply a strong biasing force downward by inserting a spring inside the piston, a reliable buffering action can be obtained with a slight gas pressure. Favorable results are obtained when mounted on a capacity spray can.
[0009]
According to another embodiment of the injection delay device of the present invention, the piston is urged downward by the elastic force of the spring. With this configuration, the pressure regulating chamber is formed by the gas flow that flows up lifts the piston against the elastic force of the spring, so that an appropriate buffer action can be obtained by changing to a spring having a different spring constant. .
[0010]
Preferably, the gas storage chamber in this embodiment desirably has a volume that occupies most of the lower portion of the cylindrical body, that is, functions as a surge tank, and therefore, over the entire delay time. Since it is possible to supply a stable gas flow to the guide passage, it is particularly suitable for use in a large capacity or high pressure spray can.
[0011]
As described above, the permeability of the minute adjustment body substantially determines the delay time, and the permeation of the gas under a substantially constant pressure sent from the pressure adjustment chamber is maintained quantitatively and constantly. The material and shape of the plate-shaped body made of continuous foam, sintered body, artificial leather, nonwoven fabric, etc. are practically preferable. Especially, artificial leather has particularly stable permeability. In addition, it has the advantage that it is easy to mount and process.
[0012]
Hereinafter, a delayed spray apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
[0013]
【Example】
FIG. 1 shows a longitudinal cross-sectional view of a spray delay injection device according to the present invention, with the left half showing a non-use state and the right half showing a use state. FIG. 2 is a longitudinal sectional view of the main part in a non-use state showing the embodiment of the delayed spraying apparatus for spraying. FIG. 3 is a longitudinal sectional view of the delayed spraying apparatus for spraying shown in FIG. The non-use state is shown in the right half of FIG.
[0014]
In FIG. 1, a spray delay spray device according to the present invention includes a claw 22 extending inward in the circumferential direction on an outer peripheral portion of a peripheral rim 20 of a metal plate fixed to an upper end portion of a spray can S having a nozzle stem T. A shoulder cover 21 which is engaged and fixed is provided. The cylindrical nozzle body 1 having the nozzle hole 12 at the upper end is a bottomed cylinder, and at its lower end, a plurality of outer peripheral protrusions 24 that engage with the inner peripheral flange 23 of the shoulder cover 21 from the inside. The nozzle body 1 is completely held in the state once it is engaged with the shoulder cover 21.
[0015]
A cylindrical body 2 is integrally fixed in the nozzle body 1, and this cylindrical body 2 is composed of an upper portion 2a and a lower portion 2b. The lower portion 2b is fitted and fixed to the inner peripheral surface of the nozzle body 1 at the lower end portion, and at the same time, the central portion 3 engages the nozzle stem T along the longitudinal axis A inside. Further, the lower portion 2b is provided with an outflow hole 5 in the peripheral wall 4 and is provided with a gas storage chamber 6 in which a guide passage 7 is opened at an upper end portion thereof. On the other hand, the upper portion 2a has an upper opening 8 on the upper end surface, and an annular recess for slidably receiving the piston 10 urged downward along the longitudinal axis A. 9 is drilled.
[0016]
A cylindrical control member 11 having a bottomed cylindrical shape is attached to the outer peripheral surface of the cylindrical body 2 so as to be slidable along the longitudinal axis A. The cylindrical portion covers the opening of the outflow hole 5, and at the same time, a gas passage 13 communicating with the nozzle 12 is defined with the inner surface of the nozzle body 1.
[0017]
An injection control space 14 is defined between the upper end surface of the cylindrical body 2 and the cylindrical control member 11 so that the guide passage 7 formed in the upper portion 2a of the cylindrical body 2 forms an extended portion thereof. To do so, it extends through the central portion of the piston 10 along the longitudinal axis A. Furthermore, a partition wall 19 formed in the radial direction so as to block the guide passage 7 and provided with a through-hole 25 (see FIG. 2) is provided inside the guide passage 7. On the partition wall 19, a slight amount of gas in the gas storage chamber 6 is provided in the injection control space 14 prior to the injection, and the minute amount adjustment body 15 is provided in the injection control space 14. Gas is gradually leaked into the injection control space 14 to substantially determine the injection delay time.
[0018]
In addition, a cylindrical cap 18 is fitted into the upper outlet opening of the guide passage 7 so as to be pressed from above the micro-adjustment body 15, and the bottom thereof is permeable to the micro-adjustment body 15 together with the through-hole 25 described above. In order to prevent the minute adjustment body from jumping upward from the guide passage by the gas pressure, it is in contact with the surface of the minute adjustment body.
[0019]
In order to restrict and close the gas flow path from the gas storage chamber 6 in the guide passage 7 between the micro adjustment body 15 and the gas storage chamber 6, the push-down member 16 substantially constituted by a plunger. It is arranged to be movable in the axial direction. The outer peripheral surface of the push-down member 16 is slidably held by a plurality of radially arranged ribs extending in the axial direction in the guide passage, and these many ribs form a gas flow path therebetween. is doing.
[0020]
Further, the pressure adjusting chamber 17 having a variable volume buffers the pressure of the gas passing through the guide passage 7 limited by the outer peripheral surface of the pressing member 16 between the lower portion 2b of the cylindrical body 2 and the piston 10. In this case, the piston 10 and the annular recess 9 define an airtight space. When such a pressure adjusting chamber 17 is formed, the airtight state is substantially Therefore, the piston is biased downward. At the time of injection, the push-down member 16 seals the guide passage 7 so that both the pistons are fixed at a predetermined volume value. As shown in the left half of FIG. 1, the pressure regulating chamber 17 is not defined when not in operation.
[0021]
When the slight leakage of a small amount of gas from the guide passage 7 to the injection control space 14 via the minute adjustment body 15 is continued and the cylindrical control member 11 is raised to a predetermined height position, the cylindrical control member 11 The lower end portion 11a of the gas storage chamber 6 is raised to open the outflow hole 5, and the gas in the gas storage chamber 6 is ejected from the nozzle 12 through the gas passage 13. Simultaneously with the opening of the outflow hole 5, the push-down member 16 causes the back side annular surface of the lower head portion having an enlarged diameter to guide the guide passage 7 through the elastic annular seal with respect to the peripheral surface of the guide passage opening of the gas storage chamber 6. Is sealed. As a result, the cylindrical control member 11 once raised to a predetermined height position can be maintained as it is, and the injection state can be continued.
[0022]
In FIG. 1, the variable volume pressure regulation chamber 17 is a right half as an annular space centered on the shaft portion of the push-down member 16 between the lower end surface of the piston 10 and the upper end surface of the lower portion 2 b of the cylindrical body 2. In the left half, no such space is observed. This is formed and acts only at the start of operation, and its stroke amount is considerably large, and therefore the pressure buffering capacity is also large. This means that such an injection delay device can follow a gas pressure with a considerable fluctuation range. As a result, it is suitable for a gas pressure increase at a high temperature and a gas pressure decrease at a low temperature. At the same time, a stable gas pressure is applied to the micro-adjustment body 15 and the safety of the entire apparatus is ensured.
[0023]
2 and 3, most of the configuration relating to this embodiment is substantially the same as the configuration and operation of the spray delay device for a spray can according to the present invention shown in FIG. Only the configuration unique to this embodiment will be described below using the same reference numerals as those used in the above.
[0024]
2 and 3, the upper portion 2a of the cylindrical body 2 has an upper opening 8 on the upper end surface, and the spring 27 preferably has a coil spring downward along the longitudinal axis A. A piston 10 biased by force is provided. The formation of the pressure adjusting chamber 17 causes the inflowing gas flow to lift the piston 10 against the elastic force of the spring 27, so that a gas pressure much higher than that of the embodiment shown in FIG. Therefore, it is particularly suitable for use in a large capacity or high pressure spray can. Of course, it is also suitable for use in a high temperature environment where the expansion force of the gas greatly increases. Reference numeral 28 denotes a breathing hole in the annular recess 9 constituting the cylinder bore, and reference numeral 29 denotes a breathing hole formed in the cylindrical control member 11. These holes open to the gas passage 13. In addition, the gas pressure acts on the back side of the piston 10 at the time of injection, and an auxiliary force for maintaining a static balance of the piston is applied in the annular recess 9.
[0025]
As one application example, by using a coil spring having a different spring constant instead of the spring 27 described above, an appropriate buffering action according to the gas pressure to be used can be obtained. The gas storage chamber 6 in this embodiment has a volume that occupies most of the lower portion 2b of the cylindrical body 2 in consideration of being attached to a large capacity or high pressure spray can. Desirably, since it functions as a surge tank, a stable gas flow can be supplied to the guide passage over the entire delay time. Further, it is necessary to improve the pressure resistance of the entire apparatus by providing such a spring having a large elastic force and a large gas storage chamber 6, but the central portion 3 of the lower portion 2b of the cylindrical body 2 to which the nozzle stem is connected. Is preferably replaced with a bottom joint 30 with a separate fitable configuration.
[0026]
【The invention's effect】
With the configuration as described above, it is possible to set and control the injection delay time stably and accurately even in various environments, and the actual injection gas is supplied to the gas storage chamber through a completely different gas passage. Since the liquid is directly supplied to the nozzle from the outlet and is injected to the outside, there is no need to use a liquid and a disintegrant, and the effect of being extremely safe and clean can be obtained.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a spray delay injection device according to the present invention, with the left half showing a non-use state and the right half showing a use state.
FIG. 2 is a longitudinal sectional view of an essential part in a non-use state showing the embodiment of the spray delay injection device.
FIG. 3 is a longitudinal sectional view of the spray delay injection device shown in FIG. 2, with the left half showing a non-use state and the right half showing a use state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Nozzle main body 2 Cylindrical body 2a Upper part 2b Lower part 3 Central part 4 Perimeter wall 5 Outflow hole 6 Gas storage chamber 7 Guide passage 8 Upper opening 9 Annular recess 10 Piston 11 Cylindrical control member 12 Injection hole 13 Gas passage 14 Injection control space 15 Micro-adjustment body 16 Push-down member 17 Pressure adjustment chamber 18 Cap 19 Partition wall 20 Peripheral rim 21 Shoulder cover 22 Claw 23 Inner peripheral flange 24 Outer protrusion 25 Through-hole 26 Through-hole 27 Spring 28 Breathing hole 29 Breathing hole 30 Bottom Joint A Longitudinal axis S Spray can T Nozzle stem

Claims (3)

In the spray delay device for spraying, which is attached to the nozzle stem of the spray can and is pressed down and locked together with the stem at the time of spraying to start spraying after a lapse of a predetermined time.
The delay device includes a shoulder cover locked to the spray can;
A cylindrical nozzle body having a nozzle hole at the upper end which is held and engaged with the shoulder cover at the same time as the nozzle stem is pushed down during injection;
A gas storage chamber defined by a lower end portion that is integrally inserted and fixed in the main body and that engages with the nozzle stem, a peripheral wall in which an outflow hole is formed, and an upper end portion in which a guide passage opens. A lower portion, and an upper portion having an opening in the upper end surface and provided with an annular recess for slidably receiving a piston urged downward along the longitudinal axis. A cylindrical body comprising:
A gas passage which is slidably attached to the outer peripheral surface of the cylindrical body along the longitudinal axis and the cylindrical portion covers the outflow hole and communicates with the nozzle hole between the inner surface of the nozzle body. It is composed of a cylindrical control member having a bottomed cylindrical shape,
The guide passage passes through a central portion of the piston along a longitudinal axis so as to define an injection control space between an upper end surface of the cylindrical body and the cylindrical control member;
In the guide passage, a permeable minute adjustment body is provided that gradually leaks a small amount of gas in the gas storage chamber into the injection control space prior to injection, and substantially determines the injection delay time. And
A push-down member for restricting and closing a gas flow path from the storage chamber is disposed in the guide passage between the micro-adjustment body and the gas storage chamber so as to be movable in the axial direction.
Between the lower part of the cylindrical body and the piston, it is possible to form a variable volume pressure adjustment chamber for buffering the pressure of the gas that has passed through the guide passage limited by the push-down member,
The leakage of gas from the guide passage to the injection control space raises the cylindrical control member and simultaneously raises the lower end of the control member to open the outflow hole, and the gas in the gas storage chamber is released into the gas. A spray delaying device for spraying, wherein the spraying jet is ejected from a nozzle through a passage, and the pressing member closes the guide passage. The spray delay device for spray according to claim 1, wherein the piston is hermetically fitted into the cylindrical body, and is biased downward by air pressure in the cylindrical body. The spray delay device for spray according to claim 1, wherein the piston is biased downward by an elastic force of a spring.

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