JP5182819B2 - pump - Google Patents

Description

  The present invention relates to a pump, and more particularly, to a pump having a back suction mechanism and having good liquid drainage.

  The present applicant has proposed a pump pressing head with good liquid drainage. (For example, see Patent Document 1)

  The pump described in Patent Document 1 includes a cylinder that is suspended and mounted in the container body and includes a suction valve at the bottom, and an operation member that is mounted so as to be able to be pushed into the cylinder in an upward biased state. Yes. The actuating member is fitted with a pressing head at the upper end of a stem that can be pushed in an upward biased state, and an annular piston is mounted on the outer periphery of the stem so as to be capable of relative vertical movement. The annular piston constitutes a discharge valve that opens a discharge valve hole provided in the stem when the stem is lowered and closes when the stem is raised. In addition, the lower end portion and the cylinder bottom portion constitute a suction valve, and a bar portion standing upward is slidably projected from the lower end opening of the stem to the lower portion of the stem, increasing the volume of the stem when the stem is raised, A poppet is provided to reduce the volume in the stem when descending.

JP 09-225359 A

  A pump equipped with such a poppet and a discharge valve exhibits a unique effect of exhibiting an excellent back suction function and good drainage.

  However, a pump having a back suction function of this type may have a disadvantage in that a large force is required when the operation member is pushed down.

  In the present invention, it is possible to exhibit an excellent back suction function without requiring a large force when the operating member is pushed down, and the structural change is small compared to the conventional product, and the durability is also improved. Propose an excellent pump. In addition, an excellent pump is proposed in which there is no risk of backflow of the liquid in the cylinder into the container.

The first means is configured as follows. In other words, the cylinder B includes a cylinder B that is suspended and mounted in the container body 100, and an operating member D that is mounted so as to be able to be pushed into the cylinder B in an upwardly biased state. The peripheral edge is slidably fitted and mounted on the outer periphery of the stem D _{1 so as} to be relatively movable up and down, and when the stem D ₁ is lowered, the discharge valve hole 41 provided in the stem D ₁ is opened and closed when the stem D ₁ is raised. annular piston will comprise D _4, as well as projecting the upper end of the stem D ₁ of the bottom opening from the stem D ₁ in slidably bar portion 36 in a lower portion, the upper end portion of the rod portion 36 when increasing the stem D ₁ to there but a pump having a back suction mechanism to increase the volume of the stem D ₁ relative downward, the upper end portion of the rod portion 36 at the time of descent of the stem D ₁ to reduce the volume within the stem D ₁ relative increase Te, within the stem D ₁ of the rod portion 36 leading edge from the lowest position, the rod portion 36 leading edge stem D ₁ A discharge valve hole 41 having a vertical width up to the innermost rising position was provided.

  The second means is configured as follows. That is, in the first means, a pair of discharge valve holes 41 are provided at opposing positions.

The third means was configured as follows. That is, in either the first means or the second means, the actuating member can move up and down relatively in the upward biased state with respect to the stem D ₁ provided so as to be pushed in the upward biased state. attached to, and comprises a pressing head D ₅ of the opening and closing valve member D ₆ of the discharge port 81 with the side-energized to shift to open the discharge port 81 by the action of leverage member D ₇ when depressed, the pressing head relative to the stem pressing force is composed as is smaller than the pressing force of the stem itself.

  The fourth means is configured as follows. That is, in any one of the first to fourth means, the suction valve 33 for closing the suction valve hole 22 at the lower end of the cylinder B is constituted by the pressure contact valve body 32 integrally provided at the lower end. In addition, a suction valve member C is provided on the upper side with the rod portion 36 standing up together.

In the present invention, since the stem D ₁ within the lowest position of the rod portion 36 leading edge is provided with a discharge valve hole 41 having a vertical width of the inner stem D ₁ of the rod portion 36 leading edge to the uppermost raised position, the rod The inside of the stem D _{1 where the} portion 36 is present can be formed widely. As a result, there is no increase in load during pump operation, so there is no inconvenience that the so-called push-down becomes heavy, and light liquid discharge can be performed.

  When a pair of discharge valve holes 41 are provided at opposite positions, a larger liquid flow space can be obtained by the presence of the two discharge valve holes 41, and the balance of the arrangement of the discharge valve holes 41 is good. There is an advantage that it is also excellent.

The actuating member is mounted so as to be able to move up and down relative to the stem D ₁ provided so as to be able to be pushed in in the upward biased state, and biased on the discharge port 81 side by the action of the flange member D ₇ when pressed down. In the case where the push-down head D ₅ that opens the discharge port 81 by shifting the open / close valve member D ₆ is provided, and the push-down drag of the push- down head against the stem is configured to be smaller than the push- down drag of the stem itself, In addition to the back suction function constituted by 36 and the stem D ₁ , the back suction function provided by the pressing head D ₅ is added, so that more reliable liquid dripping prevention can be achieved, and the post-operation discharge port 81 is an on-off valve member D ₆ Therefore, the liquid dripping prevention function is surely exhibited from this point.

  When the suction valve 33 that closes the suction valve hole 22 at the lower end of the cylinder B is configured by the pressure contact valve body 32 that is integrally provided at the lower end, and the suction valve member C with the rod portion 36 standing up is provided above. Also, it has the advantage that the backflow of the liquid from the suction valve hole 22 into the container body 100 can be reliably prevented.

It is a longitudinal cross-sectional view of a pump. Example 1 It is a top view of a suction valve member. Example 1 It is a partially cutaway top view of a suction valve member. Example 1 It is a top view of a pump. Example 1 It is a longitudinal cross-sectional view of a pump. (Example 2)

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

  1 to 4 show an example of the pump 1 mounted on the container body 100. FIG. In the container body 100, the mouth and neck portion 103 is erected from the trunk portion 101 through the shoulder portion 102.

  The pump 1 includes a mounting cap A, a cylinder B, a suction valve member C, and an operating member D.

  In the mounting cap A, a screw cylinder 10 screwed to the outer periphery of the mouth and neck portion 103 is suspended from the lower surface of the top plate 11, and the guide tube 12 is erected from the outer peripheral upper surface of the top plate 11. A pair of guide grooves 13 are provided vertically on the inner surface of the guide tube 12, and locking grooves 14 are extended from the upper end of each guide groove 13 to the side along the circumferential surface of the guide tube 12. doing. Further, an engagement cylinder portion 15 extending vertically is provided around the inner peripheral edge of the top plate 11.

  The cylinder B has a cylindrical shape with upper and lower ends opened, and a flange 20 extending outward from the upper end of the outer periphery is fitted between the engagement cylinder portion 15 and the screw cylinder 10 and fixed to the mounting cap A. Yes. The opening at the lower end is configured as a suction valve hole 22 surrounded by a cylindrical suction valve seat 21. Further, a pipe fitting cylinder 23 communicating with the suction valve hole 22 is extended from the lower surface. Then, while being inserted and suspended in the container body 100, the flange 20 is placed on the mouth and neck portion 103 via the packing 24, and the mouth neck portion 103 and the mounting cap top plate 11 are clamped and fixed. Further, the upper end of the pipe 25 is fitted into the pipe fitting cylinder 23, and the lower end of the pipe 25 is suspended from the inner bottom portion of the container body 100.

  The suction valve member C includes a fitting cylinder portion 30 fitted and fixed to the outer periphery of the lower portion of the cylinder B, and the inner circumference of the fitting cylinder portion 30 is provided with three elastic pieces 31 in the circumferential direction as shown in FIG. A suction valve body 32 is extended, and the pressure valve body 32 is press-fitted on the suction valve seat 21 at the lower end of the cylinder B to constitute a suction valve 33. The suction valve 33 opens due to the negative pressure in the cylinder B, and when the negative pressure is eliminated, the suction valve 33 acts so as to return to the original closed state by the elastic restoring force of each elastic piece 31.

A support base plate 35 is stretched between the upper ends of the pair of support plates 34 erected from both sides of the fitting cylinder portion 30, and the rod portion 36 is erected upward from the center of the support base plate 35. Rod 36 upper portion is formed smaller in diameter, the small diameter portion 36a is formed in a liquid-tight manner slidable diameter lower end opening of the stem D ₁ to be described later. A plurality of ribs 37 in the circumferential direction are vertically provided on the outer periphery of the lower large-diameter portion 36b to constitute a fitting portion of a coil spring described later.

Actuating member D includes a stem D _1, and the connecting tube member D _2, and the hollow mounting member D _3, and includes an annular piston D _4, and a pressing head D _5.

The stem D ₁ has a lower end fitted to the outer periphery of the rib 37 of the suction valve member C and is supported by an upper end of a coil spring s which is raised around the rod part 36, and is always moved by the coil spring s. It has a cylindrical shape with an upper and lower opening that is biased upward, and an annular discharge valve seat 40 projects from the lower part of the outer periphery, and a pair of discharge valve holes 41 are formed in the cylindrical wall portion directly above the discharge valve seat 40. ing. Further, the upper portion of the stem D ₁ connecting the hollow mounting member D ₃ via the coupling tube member D _2. Coupling cylinder member D ₂ are then fitted to the bottom to the top of the stem D _1, the lower end portion of the fitting portion fitting part of the annular piston D ₄ between the stem D ₁ is formed on the large-diameter portion 50 An annular space to be joined is formed.

Each discharge valve hole 41 as it vertically bored in the opposite position, the vertical width of the bar portion 36 distal stem D ₁ within the lowest position of the edge, up to the uppermost position within the stem D ₁ of the rod portion 36 leading edge It has. Actuating member D in FIG. 1 is in the uppermost position, i.e. there stem D ₁ is the highest position, the leading end edge of the Cybozu portion 36 is in the lowermost position of the stem D _1. Further, by pushing down the stem D ₁ by depressing the actuating member D, the rod portion 36 relatively rises and its leading edge is in the position indicated by the two-dot chain line in FIG. Accordingly, each discharge valve hole 41 has a vertical width between each position.

In this case, some errors are naturally included within the above definition. In addition, provision of a longer length is also included. Further, the lower limit position of the lower end edge of the discharge valve hole 41 must be at least above the position where the protruding valve seat 40 is provided, and the upper limit position of the upper end edge can be extended further if the above requirements are satisfied. . Furthermore, the discharge valve holes 41 are not limited to a pair provided at the opposed positions, and may be one place or three places or more as long as the above requirements are satisfied. However the durability of the stem D _1, considering the distribution of the flow efficiency of the fluid, when provided in pairs on opposite position can be more preferably employed.

  In the illustrated example, the upper end edge of the discharge valve hole 41 is configured to be inclined and raised outward. However, by configuring the upper edge of the discharge valve hole 41 to be inclined and raised inward, the fluidity of the liquid above the rod portion 36 is further improved. It can be done smoothly.

The mounting cylinder member D ₃ has a mounting cylinder 60 fitted to the upper part of the inner periphery of the connecting cylinder member D ₂ suspended from the back surface of the top plate portion 61, and slides communicating with the inside of the mounting cylinder 60 at the center of the top plate portion 61. A cylinder 62 is erected. Further, a guide tube portion 63 is provided around the periphery of the top plate portion 61 so as to extend vertically.

Annular piston D ₄ is forms a cross-sectionally H-shaped formed by connecting the inner peripheral tubular portion 71 and the outer peripheral tubular portion 70 by the connecting portion 72, fit to be liquid-tight slide outer peripheral tubular portion 70 to the cylinder inner periphery B engaged thereby, that the upper part of the inner peripheral tubular portion 71 connecting cylinders to the inner periphery of the large-diameter tubular portion 50 of the member D ₂ was liquid-tightly slidably fitted. Further, the until connecting portion 72 from the top surface the lower end of the inner peripheral tubular portion 71 is in close contact with the discharge valve seat 40 abuts the lower end surface of the large diameter cylindrical portion 50 of the connecting tube member D _2, the stem D ₁ The discharge valve 73 is formed with the discharge valve seat 40.

Pressing head D ₅ is the stem D ₁ through the hollow mounting member D ₃ which was linked to possible depression, above the sliding tube 62 a cylinder portion 80 which slides allowed lowerable fitted to the outer periphery, distal end the discharge port 81 provided with an open valve chamber R in, are provided to be depressed relative to the mounting cylinder member D _3.

Further, the valve chamber R is installed at energized closing valve member D ₆ to the discharge port 81 side. Off valve member D _6, along the rear periphery to slidably fitted to the inner periphery of the valve chamber R, it closes the discharge port 81 in the forward forcing state. Further, the inside of the valve chamber R and the inside of the cylinder portion 80 are communicated with each other through a communication port, thereby defining a liquid flow path from the inside of the cylinder portion 80 to the discharge port 81 through the communication port. As the forward biasing means, the second coil spring s ₁ is interposed between the front surface of the rear wall of the valve chamber R and the branch portion of the reverse skirt-like portion of the on-off valve member D ₆ . Further, the rear end portion of the opening and closing valve member D ₆ projected from the window hole of the rear wall of the valve chamber R, are recessed annular recess for the lever member engaging the protruding portion.

Further, there is provided a lever member D ₇ is the pressing head D _5. Lever member D _7, together to coordinate the upper end to the opening and closing valve member D ₆ rear portion, and a lower end abutting engagement thereby locked to the top panel 61 top surface of the mounting tubular member D _3, also hollow mounting member D ₃ It is swingably pivoted as draw-off valve member D ₆ rearward when pushed down the pressing head D ₅ against.

In lever member D ₇ in the illustrated example, as well as extend the bifurcated inclined plate portion 91 down the upper portion to the front of the vertical plate portion 90 lower end which is linked to the rear end of the opening and closing valve member D _6, the inclined The lower end portion of the plate portion 91 is brought into contact with and locked to the upper surface of the top plate portion 61 on both sides of the sliding cylinder 62. Integration with lever member D ₇ and the opening and closing valve member D ₆ has the annular recess of the opening and closing valve member D ₆ is fitted into the notch provided on the upper end center of the vertical plate portion 90.

Further, pivot shafts provided on both sides of the refracting portion are fitted to the bearings on both sides so as to be rotatable. Then, and to bias the linkage portion of the vertical plate portion 90 top to always forward by the second on-off valve member D ₆ which is forward biased by the coil spring s _1, by depressing the pressing head D _5, the hollow mounting member D The top plate portion 61 of ₃ pushes up the inclined plate portion 91 to rotate the collar member D ₇ and pulls the on-off valve member D ₆ backward against the forward biasing force of the second coil spring s ₁ . .

Such pressing head D ₅ is pressed drag pressing head D ₅ relative to the stem D ₁ is configured so as to be a smaller than pressing force of the stem itself. To configure in this way, than the elastic material to essentially be upward urge the stem of the pump mounting small select elastic force of the elastic member for the opening and closing valve member D ₆ are forward forcing These may be selected in consideration of the frictional force between the sliding cylinder and the cylinder, the frictional force when the saddle member is swung, and the like.

The outer peripheral lower portion of the pressing head D ₅ are projected a pair of projections 82 which vertically movably fitted relative to the guide grooves 13 of the guide cylinder 12. If the projections 82 are in the guide grooves 13 positions are possible depression of the pressing head D _5, is drawn are possible vertical movement of the actuating member D. On the other hand, if the position of the pressing head D ₅ from this state by turning on the locking groove 14 can be prevented depressed depression head D _5.

Pump 1 configured as described above, depressing the pressing head D ₅ from the state of FIG. 1, the first stem D ₁ is not lowered, the pressing head D ₅ descends relative to the mounting cylinder member D _3. In this case, the lever member lower end of the D ₇ is pushed up to the top panel 61 top surface of the mounting tubular member D ₃ rotates about the pivot axis, the opening and closing valve member D to pivot the upper end to the rear ₆ Is moved backward against the elastic force of the second coil spring s ₁ , and the discharge port 81 is opened.

Next, the stem D ₁ is lowered, and when the stem D ₁ is lowered, the annular piston D ₄ is raised relative to the stem D ₁ to open the discharge valve 73, and the pressurized liquid in the cylinder B passes through the discharge valve hole 41. Then, it is introduced into the sliding cylinder 62 through the stem D ₁ , and then discharged from the discharge port 81 through the cylinder portion 80 and the valve chamber R. In this case the rod portion 36 of the suction valve member C will come a protruding width of the front end in the stem D ₁ greater intruding.

Now releases the pressing of the pressing head D _5, presses the head D ₅ rises by the upper biasing force of the first stem. In this case, for example, increase of the stem within the hand presses the pressing head D ₅ top does not leave is performed, the discharge port 81 is carried out in remains open. At the same time, the annular piston D ₄ descends relative to the stem D ₁ and the discharge valve 73 closes. At the same time since the upper end portion of the rod portion 36 is lowered relative the stem D _1, the internal volume of the stem D ₁ is increased. Thus, the stem D ₁ and the valve chamber R at this time becomes a negative pressure state, exerts a back suction function. Next, there is room for releasing the hand, and the on / off valve member D ₆ moves forward by the elastic force of the second coil spring s ₁ to close the discharge port 81, and accordingly, the pressing head D ₅ is moved by the collar member D _7. lifting upward relative to the hollow mounting member D _3, the relationship between the mounting tubular member D ₃ and pressing head D ₅ is returned to its original state.

  As the operating member D rises, the inside of the cylinder B becomes negative pressure, and the suction valve 33 is opened accordingly, and the liquid in the container body 100 is introduced into the cylinder B through the pipe 25.

FIG. 5 shows another example, and shows an example in which another type of intake valve member C ₁ is used. As in the example of FIG. 1, the suction valve member C _{1 in} this example includes a rod portion 36 having an upper small-diameter portion 36a and a lower large-diameter portion 36b, and is cylindrical from the lower surface of the large-diameter portion 36b. A suction valve 33 is constituted by the lower portion 38 and the suction valve seat 21 at the bottom surface of the cylinder B and the bottom surface of the cylinder B. From the state in which the protrusion 39 protruding from the outer periphery of the cylindrical portion 38 is inserted between the rib plates 26 protruding in the circumferential direction at the lower end of the inner periphery of the cylinder B, and the lower surface of the cylindrical portion 38 and the suction valve seat 21 are in pressure contact The vertical movement until the projection 39 comes into contact with the lower surface of the coil spring s locked to the upper surface of the rib plate 26 is configured. The suction valve member C ₁ is then as configured to move up and down by a frictional force between the lower end opening portion of the rod portion 36 and the stem D _1, it is of the form so-called poppet valve body. Also in this case, a discharge valve hole 41 having the same form as the example of FIG. 1 is provided. Others are the same as in the example of FIG.

In this case, depressing the pressing head D ₅ from the state of FIG. 5, the first stem D ₁ is not lowered, the pressing head D ₅ descends relative to the mounting cylinder member D _3. In this case, the lever member lower end of the D ₇ is pushed up to the top panel 61 top surface of the mounting tubular member D ₃ rotates about the pivot axis, the opening and closing valve member D to pivot the upper end to the rear ₆ Is moved backward against the elastic force of the second coil spring s ₁ , and the discharge port 81 is opened.

Then the stem D ₁ is lowered, the suction valve member C ₁ is lowered together with it, to close the suction valve 33, also a relative increase to the discharge valve annular piston D ₄ by the lowering of the stem D ₁ is with respect to the stem D ₁ 73 opens, and the pressurized liquid in the cylinder B passes through the stem D ₁ through the discharge valve hole 41 and is introduced into the sliding cylinder 62, and then passes through the cylinder portion 80 and the valve chamber R to the discharge port 81. More discharged. At this time, the rod portion 36 of the suction valve member C ₁ enters the stem D ₁ with a large protruding width at its tip.

Now releases the pressing of the pressing head D _5, presses the head D ₅ rises by the upper biasing force of the first stem. In this case, for example, increase of the stem within the hand presses the pressing head D ₅ top does not leave is performed, the discharge port 81 is carried out in remains open. At the same time, the annular piston D ₄ descends relative to the stem D ₁ and the discharge valve 73 closes. Further, the suction valve member C ₁ is increased initially with the stem D ₁ is relatively lowered with respect to the stem after the projection 39 is brought into contact with the lower surface coil spring s, therefore the upper end portion the stem D ₁ of the rod portion 36 to lowered relative, the internal volume of the stem D ₁ is increased. The stem D ₁ and the valve chamber R at this time becomes a negative pressure state, it exerts a back suction function. Next, there is room for releasing the hand, and the on / off valve member D ₆ moves forward by the elastic force of the second coil spring s ₁ to close the discharge port 81, and accordingly, the pressing head D ₅ is moved by the collar member D _7. lifting upward relative to the hollow mounting member D _3, the relationship between the mounting tubular member D ₃ and pressing head D ₅ is returned to its original state.

  As the actuating member D is raised, the suction valve 33 is opened and the pressure in the cylinder B is reduced, and the liquid in the container body 100 is introduced into the cylinder B through the pipe 25.

1 ... Pump A ... Installation cap
DESCRIPTION OF SYMBOLS 10 ... Screw cylinder, 11 ... Top plate, 12 ... Guide cylinder, 13 ... Guide groove, 14 ... Locking groove, 15 ... Engagement cylinder part B ... Cylinder
20 ... Flange, 21 ... Suction valve seat, 22 ... Suction valve hole, 23 ... Pipe fitting cylinder,
24 ... packing, 25 ... pipe, 26 ... rib plate C ... suction valve member (C ₁ )
30 ... Fitting cylinder part, 31 ... Elastic piece, 32 ... Pressure contact valve body, 33 ... Suction valve, 34 ... Support plate,
35 ... support base plate, 36 ... bar part, 36a ... small diameter part, 36b ... large diameter part, 37 ... rib, 38 ... cylindrical part, 39 ... protrusion D ... acting member
D ₁ … stem
40 ... Discharge valve seat, 41 ... Discharge valve hole
D ₂ ... Connecting cylinder member
50 ... Large diameter cylinder
D ₃ ... Installation cylinder member
60 ... Mounting tube, 61 ... Top plate, 62 ... Sliding tube, 63 ... Guide tube
D ₄ ... annular piston
70 ... outer peripheral cylindrical part, 71 ... inner peripheral cylindrical part, 72 ... connecting part, 73 ... discharge valve
D ₅ ... Pressing head (R: valve chamber)
80 ... Cylinder, 81 ... Discharge port, 82 ... Projection
D ₆ … Open / close valve member
D ₇ …
90 ... Vertical plate part, 91 ... Inclined plate part s ... Coil spring
s ₁ ... 2nd coil spring
100 ... Container body
101 ... trunk, 102 ... shoulder, 103 ... mouth and neck

Claims (4)

Container body (100) hanging to the loaded cylinder in the (B), the cylinder (B) comprises an actuating member mounted so as to be pushing in the upper biasing state (D) relative to the actuating member (D) is causes slidably fitted to the outer periphery in the circumferential cylinder (B), the stem (D ₁₎ relative vertical movement is able to be mounted on the outer peripheral and the stem (D during descent of the stem (D _{1) 1)} the discharge valve hole is opened (41) which is provided, it comprises an annular piston which closes the ascent (D _4), the stem (D ₁₎ stem (D ₁ from the lower end opening) in slidable in the lower in addition to projecting the upper end portion of the bar portion (36), to increase the volume of the stem (D ₁₎ the upper end of the stem rod portion during increase of (D ₁₎ (36) is relatively lowered, the stem (D back to the upper end of the rod portion during descent of ₁₎ (36) decreases the volume of the stem (D ₁₎ relative rise A pump with a suction mechanism, the vertical width of the bar portion (36) leading edge of the stem (D ₁₎ in the lowest position, to the bar portion (36) leading edge of the stem (D ₁₎ in the uppermost position A pump characterized by having a discharge valve hole ( 41 ) equipped with The pump according to claim 1, wherein a pair of discharge valve holes ( 41 ) are provided at opposing positions. Actuating member, relative vertically movably mounted above biased state with respect to the stem (D ₁₎ which is provided to be push above urging state and the discharge port by the action of leverage member (D ₇₎ when depressed (81) provided with a closing valve member with side-energized (D ₆₎ migrated allowed to discharge opening (81) for opening the pressing head (D _5), pressing force of the pressing head relative to the stem is than pressed drag stem itself 3. The pump according to claim 1, wherein the pump is configured to be small. A suction valve ( 33 ) that closes the suction valve hole ( 22 ) at the lower end of the cylinder ( B ) is formed by a pressure contact valve body ( 32 ) that is integrally provided at the lower end, and the rod portion ( 36 ) is integrally raised upward. The pump according to any one of claims 1 to 3, further comprising a suction valve member ( C ) .

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