JP4849562B2 - Check valve and pump container using the check valve - Google Patents

Description

  The present invention relates to a check valve and a pump container using the check valve.

  As a pump container, a container body having a cylindrical body part with an opening at the lower end surface having the same shape from the top to the bottom, and a movable body whose outer peripheral edge is fluid-tightly fitted to the lower part of the container body so as to be able to slide upward. What consists of a bottom wall and the discharge pump which incorporates the pump mechanism with which the container body upper end part was equipped is known (for example, refer patent document 1).

In this type of pump container, the suction valve of the discharge pump is located in the upper end opening of the container body, and these suction valves are used in such a form that the periphery of the valve plate is connected by an elastic connecting piece. Yes. Then, after the liquid in the cylinder is discharged by the action of the discharge pump, the liquid in the container opens due to the negative pressure in the cylinder and enters the cylinder by opening the suction valve. The movable bottom wall is configured to rise by pressure.
Japanese Patent Laid-Open No. 08-282708

  In the case of the pump container of the above-mentioned Patent Document 1, there is a possibility that inconvenience that the valve plate does not return to the original state when the valve plate of the suction valve rises during liquid discharge. If the valve plate does not return to its original position, naturally the valve function will be hindered and smooth operation will be hindered. In addition to the normal discharge operation, there is also a possibility that the valve plate moves due to the impact of dropping the container and does not return to the original state.

  The present invention has been made in view of the above points, and can reliably prevent the inconvenience that the valve plate does not return to the original state from the moving position during the liquid discharge operation or when the container is accidentally dropped, We propose a check valve that can perform smooth liquid discharge operation at all times, and propose a pump container using such a check valve.

  The check valve of the present invention includes a valve plate supported by a plurality of elastic connecting pieces in the circumferential direction, and is configured to close the valve hole so that the valve hole can be opened and closed by the valve plate. Therefore, the valve plate is always in a state where its lower surface is pressed against the valve seat around the valve hole by the elastic connecting piece, and when the downstream pressure of the valve plate becomes negative or the hydraulic pressure upstream of the valve plate increases. Further, it is configured to move in the downstream direction against the elastic force of each elastic connecting piece. Various forms of the elastic connecting piece can be adopted as long as the valve plate and the surrounding wall surface are connected so that the valve plate can be raised, but preferably after extending outward from the outer surface of the valve plate as shown in the example of the drawing. A configuration in which the valve plate extends along the peripheral surface of the valve plate and then extends outward and is connected to the surrounding wall surface is preferable because the valve plate can be moved relatively stably and with a stable vertical movement. Further, the number is not particularly limited, but a plurality of locations may be provided.

  Further, the check valve of the present invention is provided with a rising width regulating means for regulating the rising width of the valve plate on the bottom surface of the valve plate. This rising width restricting means is designed to prevent an unnecessary transition when the valve plate is lifted by negative pressure or the like, thereby preventing any undesired deformation of each elastic connecting piece. . In particular, this is particularly effective when an elastic connecting piece that is long and relatively easily deformed is employed, as in the above-described illustrated example.

  The rising width restricting means can be formed by providing an engaging means on the lower surface that engages when the valve plate is raised to a predetermined position. For example, the hook suspended from the peripheral edge of the valve plate lower surface is configured to be engaged with the lower surface of the wall around the valve hole when the valve plate is raised by a predetermined width. Alternatively, a plurality of engagement rods projecting radially from the lower portion of the support rod suspended from the center of the bottom surface of the valve plate are similarly engaged with the bottom surface of the wall portion around the valve hole. The engaged means that engages with the engaging means is not limited to the lower surface of the wall portion around the suction valve hole, but may be a convex portion or a cylindrical portion that is suspended from the lower surface of the wall portion.

  The width by which the valve plate is lifted by the lift width restricting means may be selected in consideration of the shape of the elastic connecting piece, the size of the cylinder, and the like. An example is a range of about 1 to 10 mm, but it is not limited to this.

  The check valve of the present invention can be used for various types of liquid discharge containers such as a pump container and a tube container, and the pump container of the present invention employs this check valve as a suction valve, And a storage chamber whose lower end is closed by a movable bottom wall that rises due to a decrease in. The upper end of the storage chamber communicates with the cylinder via a suction valve. Accordingly, the peripheral wall of the storage chamber is configured such that the movable bottom wall can slide and rise on the outer peripheral edge, and at least the peripheral wall in the range where the movable bottom wall rises has the same inner diameter from bottom to top and the outer peripheral edge of the movable bottom wall is dense. The shape can be fitted.

  A pump mechanism for sucking up and discharging the liquid in the storage chamber is provided in the upper portion of the storage chamber. The pump mechanism can adopt various forms as long as it is a pump mechanism used in this type of conventional container, but a discharge head is fitted to the upper end of a stem connected to a piston sliding in the cylinder. It is preferable to employ a configuration in which an operating member that can be pushed down in an upward biased state is provided, and the liquid in the cylinder is discharged from the discharge port of the discharge head by moving the operating member up and down.

  In the pump container of the present invention, the valve plate is normally in a state where the lower surface of the valve plate is in pressure contact with the top surface of the top around the valve hole by the elastic connecting piece. It is configured to move upward against the force. Further, the pump container is mainly formed of a synthetic resin, and if necessary, a metal is used for the coil spring or an elastomer is used for a portion requiring elasticity, but there is no particular limitation.

  The first means is configured as follows. That is, the valve plate 13 whose periphery is supported by a plurality of elastic coupling pieces 12 in the circumferential direction and whose valve hole is closed so as to be movable up and down is provided, and the lower surface of the valve plate 13 is regulated to restrict the rising width of the valve plate 13 A check valve provided with a width regulating means.

  The second means is configured as follows. That is, in the first means, the rising width restricting means has a plurality of hooks 18 suspended at equal intervals in the circumferential direction from the peripheral edge of the bottom surface of the valve plate 13 around the valve hole when the predetermined width of the valve plate 13 is increased. It was comprised so that it might engage with the wall part lower surface.

  The third means was configured as follows. That is, in the first means, the ascending width restriction means includes a plurality of engagement rods 41 projecting radially from the lower portion of the support rod 40 suspended from the center of the bottom surface of the valve plate 13. It is configured to engage with the lower surface of the wall around the valve hole when the predetermined width is raised.

  The fourth means is configured as follows. That is, in any one of the first to third means, each elastic connecting piece 12 extends along the peripheral surface of the rear valve plate 13 extending outward from a predetermined position on the outer surface of the valve plate 13. It extends and then forms outward.

  The fifth means is configured as follows. That is, a storage chamber R whose lower end is closed by a movable bottom wall 4 that rises as the storage liquid decreases, a cylinder 10 that is provided on the storage chamber R and communicated with the interior of the storage chamber R via a suction valve A; The discharge head 22 is fitted to the upper end of the stem 21 linked to the piston 20 that slides in the cylinder 10, and is provided so as to be able to be pushed down in the upward biased state, and the operation member 11 is moved up and down. Thus, the pump container is configured to discharge the liquid in the cylinder 10 from the discharge port 34 of the discharge head 22, and the suction valve A is the reverse of any one of the first to fourth means. A pump container provided with a stop valve.

  In the check valve of the present invention, the valve plate 13 does not rise more than a predetermined rising width not only during a liquid discharge operation but also when subjected to a large impact, and as a result, an unnecessary burden is placed on the elastic connecting piece 12. Therefore, there is no possibility that the deformation will occur, and there is no possibility that the valve plate 13 will remain open at a position away from the valve hole.

  In the case of adopting ascending width restricting means configured to engage multiple hooks 18 suspended from the peripheral edge of the lower surface of the valve plate 13 at equal intervals in the circumferential direction to engage the lower surface of the wall around the valve hole when the predetermined width of the valve plate 13 is increased The raised valve plate 13 can be securely held and locked in place at a predetermined position, and each elastic connecting piece 12 can be elastically deformed evenly. As a result, each elastic connecting piece 12 Sufficient elastic restoring force can be exhibited.

  A plurality of engagement rods 41 projecting radially from the lower portion of the support rod 40 suspended from the center of the lower surface of the valve plate 13 are configured to engage with the lower surface of the wall portion around the valve hole when the valve plate 13 rises by a predetermined width. Similarly, when the rising width restricting means is employed, the elastic connecting piece 12 can exhibit a sufficient elastic restoring force.

  Valve plate 13 outer surface When the elastic coupling piece 12 is extended along the peripheral surface of the rear valve plate 13 that extends outward from a predetermined position and then extends outward, the rising width of the valve plate 13 is compared. There is an advantage that the valve plate 13 can be selected smoothly and the valve plate 13 can be moved up and down smoothly.

  In the pump container according to the present invention, the valve plate 13 of the suction valve A does not rise more than a predetermined rising width not only when the liquid is discharged but also when the container is accidentally dropped. No unnecessary load is applied to 12 and there is no risk of deformation thereof, and there is no risk of inconvenience that the valve plate 13 remains open at a position away from the suction valve hole 5.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 4 show an example of the pump container according to the present invention. In the figure, 1 denotes a pump container. The pump container 1 includes a storage chamber R for storing a liquid. The storage chamber R is defined by a peripheral wall 2 having the same inner diameter from the bottom to the top, a top wall 3 extending from the upper end of the peripheral wall 2, and a movable bottom wall 4 attached to the lower part of the peripheral wall 2. A suction valve hole 5 is opened at the center of the wall 3.

  The movable bottom wall 4 is a vertically long annular slide having upper and lower edges projecting outward in an upward skirt shape and a downward skirt shape from the outer peripheral edge of the bottom wall portion 4a that crosses and closes the inner peripheral lower portion of the peripheral wall 2. The portion 4b is extended, and the upper and lower skirt-like portions are fitted to the inner surface of the peripheral wall 2 so as to be liquid-tight and slidable. A cylindrical hanging cylinder 4c is integrally suspended from the bottom center of the bottom wall 4a. Further, the bottom lid 6 is mounted by fitting and fixing the outer peripheral edge portion to the lower end portion of the peripheral wall 2 below the mounting position of the movable bottom wall 4. A support cylinder 6a is vertically provided from a center of the upper surface of the bottom lid 6 and a plurality of circumferential grooves are vertically provided, and a lower end of the drooping cylinder 4c is brought into contact with an upper end of the support cylinder 6a.

  In the upper part of the storage chamber R, a cylinder 10 that is in communication with the storage chamber R via a suction valve A is erected, and an operating member 11 that has a lower end slidably fitted in the cylinder 10 is provided. I have.

  The suction valve A includes a valve plate 13 that is supported by a plurality of elastic connecting pieces 12 in the circumferential direction so as to be movable up and down, and presses the periphery of the valve plate 13 against the upper surface of the top wall 3 around the suction valve hole 5. Thus, the suction valve hole 5 is configured to be closed and opened. 2 and 3 show a valve member 14 forming the suction valve A. The valve member 14 connects the fitting cylinder 15 and the valve plate 13 by the elastic connecting pieces 12 at three locations in the circumferential direction. Supports vertical movement. The fitting cylinder 15 is fitted to the lower end portion of the inner periphery of the cylinder 10, and the upper end is locked by a locking protrusion 16 projecting from the inner periphery of the cylinder 10 to prevent it from coming out. Each elastic connecting piece 12 extends along the rear valve plate peripheral surface extending outward from a predetermined position on the outer surface of the valve plate 13, and then extends outward again to connect to the predetermined position on the inner surface of the fitting cylinder 15. Yes.

  On the lower surface of the valve plate 13 of the suction valve A, a rising width regulating means for regulating the rising width of the valve plate 13 is provided. Ascending width restricting means engages a plurality of engaging protrusions 18a of hooks 18 extending in the circumferential direction from the peripheral edge of the lower surface of the valve plate 13 with the lower surface of the top wall 3 around the suction valve hole 5 when the valve plate 13 rises by a predetermined width. (See FIG. 4).

  The actuating member 11 includes a piston 20 fitted to the inner periphery of the cylinder 10 so that the outer periphery is slidable, a stem 21 fitted to the inner peripheral edge of the piston 20 so that it can move up and down by a predetermined width, and an upper end of the stem 21. The discharge head 22 is fitted, and is always urged upward by a coil spring 23.

  The stem 21 has a bottomed cylindrical shape, and a through hole 24 is formed at a predetermined position on the bottom of the cylinder wall, and a flange-like discharge valve seat 25 projects from the outer periphery of the cylinder wall below the through hole 24. The piston 20 has an annular shape having an H-shaped cross section, and the upper end edge and the lower end edge of the outer peripheral cylindrical piece are fitted to the inner periphery of the cylinder 10 so as to be liquid-tightly slidable. Further, the upper end edge of the inner peripheral cylindrical piece is fitted to the outer surface of the annular recess 26 of the lower end opening formed on the outer periphery of the stem 21 above the through hole 24 so as to be liquid-tightly slidable, and the lower end of the inner peripheral cylindrical piece The edge is in liquid-tight pressure contact with the discharge valve seat 25. The discharge valve B constituted by the piston 20 and the discharge valve seat 25 is normally closed, and the piston 20 is lifted relative to the stem 21 when the operating member 11 is pushed down so that the discharge valve B is opened. Yes.

  In the discharge head 22, a vertical cylinder 30 fitted to the upper outer periphery of the stem 21 is suspended from the back surface of the top plate 31, and a peripheral wall portion 32 is suspended from the peripheral portion of the top plate 31. Further, the tip of a nozzle 33 having an open base at the top of the vertical cylinder 30 passes through the peripheral wall portion 32 and protrudes forward, and a discharge port 34 is opened at the tip. The coil spring 23 is interposed between the top back surface of the discharge head 22 and the upper surface of the container outside the cylinder 10, and the engagement of the discharge head peripheral wall 32 to the downward step 35 formed on the upper surface of the container outside the cylinder 10. The mating ridge 36 is engaged to prevent upward slipping.

  Then, by pushing down the discharge head 22 against the upward bias of the coil spring 23, the annular piston 20 rises relative to the stem 21 by the hydraulic pressure, and the discharge valve B is opened. Since the inside of the stem 21 communicates with the inside of the stem 21 through the through hole 24, the liquid in the cylinder 10 is discharged from the discharge port 34 at the tip of the nozzle 33 through the through hole 24. On the other hand, when the discharge head 22 is raised, the piston 20 is lowered relative to the stem 21 and the discharge valve B is closed. At that time, the suction valve A is opened in the cylinder 10 which has become negative pressure, and the inside of the storage chamber R is opened. The liquid is introduced. At this time, when the valve plate 13 is raised to a predetermined position, the engagement protrusions 18a of the hooks 18 abut against the back surface of the top wall 3 to prevent the valve plate 13 from moving further upward.

  5 to 7 show other examples, and an example in which other rising width regulating means is provided in the pump container of FIG. As shown in FIGS. 6 and 7, the rising width restricting means is configured to raise a plurality of engaging rods 41 projecting radially from the lower portion of the supporting rod 40 suspended from the center of the bottom surface of the valve plate 13 by a predetermined width of the valve plate 13. It is configured to be engaged with the lower surface of the top wall 3 around the suction valve hole 5 sometimes. The other configuration is the same as that of the example of FIG.

  Also in this case, by pushing down the discharge head 22, the liquid in the cylinder 10 is similarly discharged from the discharge port 34 at the tip of the nozzle 33 through the through hole 24. On the other hand, when the discharge head 22 is raised, the liquid in the storage chamber R is similarly introduced into the cylinder 10. At this time, when the valve plate 13 is raised to a predetermined position, the front end portion of each engagement rod 41 contacts the back surface of the top wall 3 to prevent the valve plate 13 from moving further upward.

It is a half sectional view of the pump container of the present invention. Example 1 It is an enlarged bottom view of the valve member which forms this invention pump container. Example 1 It is a longitudinal cross-sectional view which follows the XX line of FIG. Example 1 It is explanatory drawing explaining an effect | action of this invention pump container. Example 1 It is a half sectional view of the pump container of the present invention. (Example 2) It is an enlarged bottom view of the valve member which forms this invention pump container. (Example 2) It is a longitudinal cross-sectional view which follows the YY line of FIG. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pump container R ... Storage chamber, 2 ... Perimeter wall, 3 ... Top wall, 4 ... Movable bottom wall, 4a ... Bottom wall part, 4b ... Sliding part,
4c ... drooping cylinder, 5 ... suction valve hole, 6 ... bottom cover, 6a ... support cylinder, A ... suction valve,
10 ... Cylinder, 11 ... Actuating member, 12 ... Elastic connecting piece, 13 ... Valve plate, 14 ... Valve member,
15 ... fitting cylinder, 16 ... locking ridge, 18 ... hook, 18a ... engagement projection, 20 ... piston,
21 ... Stem, 22 ... Discharge head, 23 ... Coil spring, 24 ... Through hole, 25 ... Discharge valve seat,
26 ... annular recess, B ... discharge valve, 30 ... vertical cylinder, 31 ... top plate, 32 ... peripheral wall, 33 ... nozzle,
34 ... discharge hole, 35 ... downward step, 36 ... engaging protrusion, 40 ... support rod, 41 ... engaging rod

Claims (5)

  Ascending width restriction that includes a valve plate 13 that is supported by a plurality of elastic connecting pieces 12 in the circumferential direction and that has a valve hole closed so as to be movable up and down, and restricts the rising width of the valve plate 13 on the bottom surface of the valve plate 13 A check valve characterized by comprising means.   The ascending width regulating means is configured to engage a plurality of hooks 18 suspended from the lower surface periphery of the valve plate 13 at equal intervals in the circumferential direction with the lower surface of the top portion around the valve hole when the valve plate 13 is raised by a predetermined width. The check valve according to claim 1.   A plurality of engagement rods 41 projecting radially from the lower portion of the support rod 40 suspended from the center of the lower surface of the valve plate 13 are arranged on the lower surface of the top portion around the valve hole when the valve plate 13 is raised by a predetermined width. The check valve according to claim 1, wherein the check valve is configured to be engaged.   4. Each of the elastic connecting pieces 12 extends along the peripheral surface of the rear valve plate 13 extending outward from a predetermined position on the outer surface of the valve plate 13, and then extends outward. Check valve described in 1.   A storage chamber R whose lower end is closed by a movable bottom wall 4 that rises as the storage liquid decreases, a cylinder 10 provided on the storage chamber R and communicated with the interior of the storage chamber R via a suction valve A, and a cylinder 10 The discharge head 22 is fitted to the upper end of the stem 21 that is linked to the piston 20 that slides inside, and the operation member 11 is provided so that it can be pushed down in the upward biased state. A pump container configured to discharge the liquid in the cylinder 10 from the discharge port 34 of the discharge head 22, and the check valve according to any one of claims 1 to 4 is provided as the suction valve A. A pump container characterized by that.

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