JP6199699B2 - Liquid container mounting pump - Google Patents

Description

  The present invention relates to a liquid container mounting pump.

  As this kind of pump, a pump having a back suction function for sucking the liquid in the nozzle 74 back to the pump side after discharging the liquid is known. For example, Patent Document 1 discloses an annular base and the outer cylinder attached to the lower end of the inner cylinder part, each having a large-diameter outer cylinder part hanging from the stem body connected to the ejection head and the inner cylinder part hanging from the inside of the stem body. And an operating member with an annular piston mounted between them, and this operating member is inserted into the cylinder, and a coil spring for biasing the operating member upward is interposed between the lower part of the cylinder and the base. Yes. The upper part of the poppet valve body that can be raised and lowered from the lower part of the cylinder is brought into liquid-tight contact with the annular seal part formed on the inner surface of the inner cylinder part, and a plurality of locking projections attached to the lower outer surface of the poppet valve body are coiled It is locked to the lower end of the spring. A concave portion is formed in the upper portion of the poppet valve body, and back sucking is generated when the annular seal portion passes through the concave portion formation portion by raising of the operating member.

JP2012-251440

  The above-mentioned Patent Document 1 only discloses a technique that causes backsuction with respect to a poppet valve body that can be raised and lowered in a cylinder. Some liquid container pumps have a filling rod portion provided vertically at a fixed position in the cylinder, and the liquid mounting pump having such a configuration is expected to have a high-quality back suction function.

  An object of the present invention is to provide a good backsuction in a liquid container mounting pump in which a stem of an operating member that can be moved up and down with respect to a cylinder and an upper part of a filling rod fixed to the lower part of the cylinder are communicated. Is to propose.

The first means is
An outward flange 20 for locking to the upper surface of the mouth and neck portion of the container body is attached to the upper end portion of the peripheral wall portion 21, and the inward flange-like bottom wall portion 22 protruding inward from the lower end of the peripheral wall portion 21. A cylinder B having a flange hole as a suction port m, and a first check valve seat 23 around the hole edge;
A check valve member D having a first check valve body 38 disposed in the lower part of the cylinder B and forming a first check valve V1 together with the first check valve seat 23;
In the cylinder B, an operating member E inserted in an upwardly biased state so that the lower half is movable up and down,
A coil spring F interposed between the outer surface of the upper half of the actuating member E and the upper inner surface of the peripheral wall 21 of the cylinder B as an upward biasing means for the actuating member E;
The actuating member E is
A piston guide E2 in which an annular base 51 having an upper surface as a second check valve seat 54 is attached to a lower end of a vertically oriented inner cylinder portion 50 having a liquid passage hole 45 in a lower half portion;
A stem E1 having a stem main body 42 fitted to the upper half of the inner cylindrical portion 50, and hanging from the stem main body 42 via an outward flange 43;
It is inserted between the inner cylinder part 50 and the annular base 51, and can be moved up and down relative to the piston guide E2 and the stem E1. An annular piston E3 that forms a second check valve V2 with the check valve seat 54;
An ejection head E4 with a nozzle 74 attached to the top of the stem E1,
Due to the lowering of the operating member E, the pressure in the pump chamber R formed by the cylinder B portion between the first check valve V1 and the second check valve V2 becomes high, and the first check valve V1 is closed and the piston is closed. The annular piston E3 rises relative to the guide E2 to open the second check valve V2, and the liquid in the pump chamber R is discharged from the discharge head E4 via the second check valve and operates. As the member rises, the inside of the pump chamber R becomes negative pressure, the annular piston E3 descends relative to the piston guide E2, the second check valve V2 closes, and the first check valve V1 opens. The liquid is sucked into the pump chamber R from the suction port m via the first check valve,
The check valve member D is mounted in the lower part of the cylinder B by being fitted to the inner surface of the cylinder.
The filling rod portion 35 that protrudes from the check valve member D into the inner cylinder portion 50 is erected, and an annular seal portion 50c that is in liquid-tight contact with the filling rod portion 35 is formed on the inner surface of the lower end portion of the inner cylinder portion 50. Thus, the liquid in the nozzle 74 is sucked back to the stem E1 side after the liquid is discharged from the nozzle 74 in accordance with the change in the positional relationship between the inner cylinder portion 50 and the filling rod portion 35 accompanying the vertical movement of the operating member E. Forming,
Further, a communication recess 36 is formed in a part of the filling rod portion 35 in the vertical direction, and the pump chamber R and the inner cylinder portion 50 are connected via the communication recess when the annular seal portion 50c passes through the communication recess formation portion. It is formed to communicate.

  In this means, as shown in FIG. 1, in the structure in which the filling rod portion 35 erected from the check valve member D is inserted into the inner cylinder portion 50 of the operating member E, the communication recess 36 is provided in the filling rod portion 35. suggest. When the annular seal portion 50c of the filling rod portion 35 passes through the place where the communication recess 36 is formed, a back suction is generated (see FIGS. 8 to 9).

The second means includes the first means, and a process in which the first check valve V1 is closed and the second check valve V2 is opened by the lowering of the operating member E, and the liquid flows out from the pump chamber R. The second check valve V2 is closed by the raising of the actuating member E, the first check valve V1 is opened, and the actuating member E starts to rise during the stroke of sucking the liquid into the pump chamber R. (2) The process of sucking the liquid back from the stem E1 side to the pump chamber R side through the liquid passage hole 45 by the negative pressure of the pump chamber R until the check valve V2 is closed is performed.

  In this means, as shown in FIG. 5, the liquid is discharged from the pump chamber R by the lowering of the operating member E, and the liquid is sucked from the suction port m to the pump chamber R side by the rising of the operating member E as shown in FIG. During the stroke, from the stem E1 side to the pump chamber R side through the liquid passage hole 45 due to the negative pressure in the pump chamber from when the operating member E starts to rise as shown in FIG. 7 until the second check valve V2 closes. We propose that a backsack occurs. In this state, it is desirable that the first check valve seat 23 is closed by the first check valve body 38. In the illustrated example, after the back suction process through the liquid passage hole (FIG. 7) is completed, the back suction process through the communication recess (FIGS. 8 to 9) starts. I do not care.

  In the present specification, “blocking the first check valve seat 23” is not limited to a complete blockage. For example, the first check valve body substantially covers the valve hole of the first check valve seat. This includes cases where the flow is restricted. For example, this is a case where the plate-like first check valve body is slightly lifted from the first check valve seat.

The third means has the second means, and communicates so that back sucking is performed through the communication recess 36 even after the second check valve V2 is closed in the process of raising the operating member E. The formation part of the recessed part 36 was designed.

  As shown in FIG. 8, this means is configured so that the back suction through the communication recess 36 occurs after the second check valve V2 is closed (in other words, after the back suction through the liquid passage hole is completed). ing. Since the back suction through the liquid passage hole occurs in the initial stage of the ascending stroke of the operating member, the back suction is generated for a long time by generating the back suction through the communication recess thereafter.

The fourth means includes any one of the first means to the third means, and the check valve member D includes a ring cylinder portion 33 fitted to a lower portion of the peripheral wall portion 21 of the cylinder B. The plurality of elastic pieces 37 projecting inwardly from the inner surface of the lower half portion of the ring tube portion 33 support the first check valve body 38 and the top plate portion 34 Concatenated peripheral edges,
The filling rod portion 35 is disposed at a fixed position inside the cylinder B by standing up from the central portion of the top plate portion 34.

  In this means, a preferred form of the check valve member D is described. The check valve member D has a ring cylinder portion 33 fitted to the peripheral wall portion of the cylinder B, and supports the first check valve body 38 with a plurality of elastic pieces 37 protruding from the ring cylinder portion 33. Yes. Therefore, it is easy to set the strength of the negative pressure in the pump chamber R by appropriately designing the elastic force of the entire elastic piece by selecting the number and thickness of the elastic pieces. Further, the filling bar portion 35 is disposed at a fixed position in the cylinder by being continuously formed through the ring tube portion 35 and the top plate portion 34. Therefore, the height of the forming portion of the communication recess is also constant, and it is easy to design a time when backsuction occurs through the communication recess.

According to the first aspect of the invention, since the communication recess 36 is formed in a part of the filling rod portion 35 standing up from the check valve member D, the back due to the operation in which the filling rod portion 35 retracts from the inside of the inner cylinder portion 50. In addition to the suction, a back suction is generated due to the negative pressure in the pump chamber R as the operating member E rises, and the back suction amount increases.
According to the invention relating to the second means, since the back suction through the liquid passage hole 45 is generated, the back suction amount is further increased.
According to the third aspect of the invention, since the back suction through the communication recess 36 is performed even after the second check valve V2 is closed, the back suction through the liquid passage hole 45 is performed. The back suction through the communication recess 36 can be continued, and the amount of back suction can be increased.
According to the fourth aspect of the invention, the ring cylinder portion 33 is fitted into the lower portion of the peripheral wall portion 21 of the cylinder B, and the first check is made by the plurality of elastic pieces 37 protruding inwardly from the ring cylinder portion 33. Since the valve body 38 is supported, it is possible to realize a back suction with a required strength by designing the elastic force of the elastic piece 37.

It is a longitudinal cross-sectional view of the liquid container mounting pump according to the first embodiment of the present invention. It is an expanded sectional view of the principal part of the pump of FIG. It is a figure which shows one component (check valve member) of the pump of FIG. 1, the same figure (A) is the longitudinal cross-sectional view, the same figure (B) is III (B) -III ( It is the cross-sectional view seen in the B) direction. It is a longitudinal cross-sectional view of the other components (piston guide) of the pump of FIG. FIG. 2 is an operation explanatory diagram illustrating a state in which liquid is discharged while the operating member of the pump of FIG. 1 is being lowered. It is action | operation explanatory drawing which shows the state which the action | operation member of the pump of FIG. 1 fell to the minimum position of the normal streak. FIG. 7 is an operation explanatory view showing a state in which the operating member rises from the state of FIG. 6 to generate a back suction through the liquid passage hole. It is action explanatory drawing which shows the state which started the back suction via a communication recessed part in the pump of FIG. FIG. 7 is an operation explanatory diagram showing a state immediately before the back suction through the communication recess is completed in the pump of FIG. 1. FIG. 2 is an operation explanatory diagram illustrating a state in which liquid is sucked from a suction port into a pump chamber in the pump of FIG. 1.

  1 to 10 show a first embodiment of the pump of the present invention. The pump 1 includes a mounting cap A, a cylinder B, an auxiliary member C, a check valve member D, an operating member E, and a coil spring F. For convenience of explanation, the left side of FIG. 1 will be described as a front part, the right side as a rear part, the front side as a right part, and the back side as a left part.

  The mounting cap A is for fixing the pump 1 to the container body 100, and a flange-like top wall portion 11 is extended from the upper end of the cylindrical wall portion 10 to be fitted to the outer periphery of the mouth neck portion 101 of the container body 100. ing. Further, a cover tube portion 12 is erected from the outer peripheral portion of the top wall portion 11.

  The cylinder B has a flange 20 that is placed on the mouth and neck portion 101 via a packing p so as to protrude from the outer peripheral upper portion of the peripheral wall portion 21, and a bottom wall portion 22 that is open at the center from the lower end edge of the peripheral wall portion 21. A cylindrical first check valve seat 23 is erected from the periphery of the central opening of the bottom wall portion 22. The peripheral wall portion 21 is composed of a first peripheral wall portion 21a at the lower end portion and a second peripheral wall portion 21b whose diameter is expanded from the upper end of the first peripheral wall portion 21a through a step, and the upper portion of the second peripheral wall portion 21b is An outside air introduction hole 24 is formed. In addition, a pipe fitting cylinder portion 25 is integrally suspended from the bottom center portion of the bottom wall portion 22, and the upper end of the suction pipe 26 is fitted into the pipe fitting cylinder portion 25, and the lower end thereof is placed inside the container body 100. It hangs on the lower end. Note that a portion of the inside of the cylinder B between a first check valve V1 and a second check valve V2 described later forms a pump chamber R.

  The auxiliary member C is fitted to the upper end portion of the cylinder B, and has a mounting cylinder portion 30 fitted to the outer peripheral upper end portion of the peripheral wall portion 21 of the cylinder B to prevent upward slipping. The flange portion 30a attached to the upper end portion of the mounting cylinder portion 30 is locked to the inner peripheral portion of the flange 20 of the cylinder B, and assists from the middle portion in the vertical direction of the mounting cylinder portion 30 through the inward flange-like wall portion 30b. The cylindrical portion 31 is erected.

  The check valve member D is attached to the lower end in the cylinder B. The check valve member D has a ring cylinder portion 33 fitted to the inner surface of the first peripheral wall portion 21a of the cylinder B. A plurality of elastic pieces 37 project inwardly from the inner periphery of the lower half of the ring cylinder portion 33 in the circumferential direction, and are provided on the first check valve seat 23 via the elastic pieces 37. A first check valve body 38 that is in pressure contact is supported. The first check valve body 38 and the first check valve seat 23 form a first check valve V1. Further, the upper end portion of the ring tube portion 33 is closed by a horizontal top plate portion 34. A filling rod portion 35 is erected from the central portion of the top plate portion 34. As a preferred embodiment, the outer surface of the ring cylinder portion 33 is fitted to the peripheral wall portion 21 of the cylinder B while being pressed against the protrusions of the peripheral wall portion. Further, the liquid passage 33 a may be opened from the upper half of the ring cylinder 33 to the outer periphery of the top plate 34.

  The filling rod part 35 is liquid-tightly inserted into an inner cylinder part 50 of a piston guide E2 described later, and the inner cylinder part 50 moves up and down along the circumferential surface of the filling rod part 35 as the operating member E moves up and down. It has a role of causing backsucking. In the present invention, a communication recess 36 is formed in the vertical intermediate portion of the filling rod portion 35 in the vertical direction so as to generate back suction via the communication recess. This will be described later. In the illustrated example, a pair of communication recesses 36 are provided on both sides of the filling rod portion 35, but the structure can be changed as appropriate.

  The actuating member E is assembled to the cylinder B so as to be vertically movable in an upwardly biased state, and as shown in FIG. 1, the stem E1, the piston guide E2, the annular piston E3, the discharge head E4, A coil fastener E5.

  The stem E1 is fitted with a discharge head E4 at the upper end, and the lower end is inserted into the cylinder B in an upwardly biased state so as to be movable up and down, and the annular piston E3 is mounted at the lower end so as to allow relative up and down movement. It has a cylindrical shape and serves as a conduit for introducing the liquid in the cylinder B into the discharge head E4.

  In this specification, “relative vertical movement” means that both the stem and the annular piston rise, but the other rise width is larger than the rise width of one of the stem and the annular piston. The other moves to a higher position, and both the stem and the annular piston descend, but the other descending width is larger than the descending width of one of the stem and the annular piston. Will move to a lower position.

  The stem E1 of the first embodiment hangs the outer cylinder part 41 from the lower end part from the cylindrical stem body 42 via the outward flange part 43. The outward flange portion 43 may be formed so as to be inclined downward as shown in the figure. A convex locking portion 42 a is attached to the lower inner surface of the stem main body 42, and an engaging groove 42 b is provided around the upper outer surface of the stem main body 42.

  The piston guide E2 is a member that is fitted to the lower part of the stem body 42 of the stem E1 and regulates the range in which the later-described annular piston E3 of the stem E1 moves. The piston guide E2 has an inner cylinder part 50 and an annular base 51 for fitting to the stem E1.

The inner cylinder portion 50 hangs downward from at least the outer cylinder portion 41 from within the stem main body 42. On the outer surface of the upper portion of the inner cylinder portion 50, a recessed locked portion 50a that fits with the locking portion 42a is formed. From the lower half part of the inner cylinder part 50, the said annular base | substrate 51 which is located above the lower end of the inner cylinder part 50 and protrudes side outward is extended. A lower part 50b of the inner cylinder part 50 is suspended below the projecting portion of the annular base 51, and the inner surface lower end part of the lower part 50b of the inner cylinder part is liquid-tight with the outer peripheral surface of the filling rod part 35. An annular seal portion 50c that can abut against the outer periphery is formed. Further, a liquid passage hole 45 is opened in the lower half of the inner cylinder portion 50 so as to be positioned above the protruding portion of the annular base 51. In the preferred illustrated example, the liquid passage holes 45 are formed in a vertically long shape and are provided with a certain interval in the circumferential direction. However, the structure can be changed as appropriate.

  The annular base 51 protrudes from the outer periphery of the inner cylinder portion 50 to a position below the outer cylinder portion 41, and also serves as the top wall of the pump chamber R described above. The illustrated annular base 51 protrudes integrally from the outer periphery of the inner cylindrical portion 50, and has a tapered inner peripheral portion 51a having a large diameter on the lower end side that descends outward, a horizontal intermediate portion 51b, and an outer peripheral portion 51c. It is formed with. In the outer peripheral part 51c, the standing wall is erected upward and the cylindrical leg part 52 is suspended downward. From the outside of the cylindrical leg portion 52, it is directed downward. Further, in the first embodiment, the leg portion 52 is integrally suspended below the peripheral edge portion of the lower surface of the annular base 51, and a plurality of circumferential guide projections 53 are provided on the outer periphery of the leg portion 52. The upper surface of the portion extending from the tapered inner peripheral portion 51 a to the intermediate portion 51 b of the annular base 51 is formed as a second check valve seat 54.

  As shown in FIG. 2, the annular piston E <b> 3 has an H-shaped cross section in which a cylindrical inner sliding portion 60 and a cylindrical outer sliding portion 61 are connected to each other by a connecting portion 62 at the upper and lower intermediate portions facing each other. It is formed in an annular shape. The internal sliding portion 60 constitutes the second check valve V2 with the second check valve seat 54, and moves up and down with respect to the inner cylinder portion 50 of the stem E1, while the upper end portion is the outer cylinder portion 41. The inner periphery is slidably fitted. The external sliding portion 61 is slidably fitted to the inner periphery of the cylinder B. Accordingly, the annular piston E3 is configured such that the upper surface of the connecting portion 62 contacts the lower surface of the outer cylinder portion 41 from the position where the lower end portion of the internal sliding portion 60 that also serves as the second check valve body is pressed against the second check valve seat 54. It is mounted so that it can move up and down relative to the stem E1 up to the contact position.

  The discharge head E4 hangs the vertical cylinder 70 from the center of the back surface of the top plate 71, and the outer peripheral wall 72 is suspended from the peripheral edge of the top plate 71, and the nozzle 74 communicating with the vertical cylinder 70 projects forward, A discharge port 75 is opened at the tip of 74. Further, an auxiliary wall portion 76 is suspended from the top plate 71 to the vertical cylinder 70 and the outer peripheral wall 72.

  The coil fastener E5 is provided with a hook-shaped retaining portion 81 on the outer surface of the base tube portion 80 fixed to the outer surface of the upper end portion of the stem E1. The illustrated base tube portion 80 is provided with an engaging convex portion 80a fitted to the engaging groove 42b of the stem on the inner surface thereof.

  In the illustrated example, the coil spring F has an upper end locked to the lower surface of the retaining portion 81 and a lower end portion locked to the upper surface of the inward flange-like wall portion 30b. It is interposed between the parts.

  In the above configuration, when the discharge head E4 is pushed down from the state of FIG. 1, the liquid in the pump chamber R is pressurized as shown in FIG. 5, and the annular piston E3 pushed up by the liquid pressure is relative to the stem E1. The second check valve V2 is opened, and the pressurized liquid is introduced into the stem E1 through the second check valve V2 and the liquid passage hole 45, and then discharged to the outside from the discharge port 75 of the nozzle 74. The

The stem E1 descends along the outer surface of the filling rod portion 35 by pushing down the discharge head E4, and the proportion of the filling rod portion 35 in the stem E1 increases. On the other hand, as the discharge head E4 is pushed down, the piston guide E2 is also lowered, so that the annular base 51 of the piston guide E2 approaches the top plate portion 34 of the check valve member D. As shown in FIG. 6, when the outer peripheral portion 51c of the annular base 51 abuts on the outer peripheral portion of the top surface of the top plate portion 34 of the check valve member D, the operating member E reaches the lower limit position. In this state, the volume of the pump chamber R is minimized.

When release of the ejection head E4 is released, the operating member E starts to rise due to the elastic restoring force of the coil spring F. Thereby, since the inner cylinder part 50 raises the circumference | surroundings of the filling rod part 35, the backsucking by the filling rod part 35 retreating from the inner cylinder part 50 (relatively descending) arises. This back suction continues until the raising of the actuating member E is completed.

  Further, in the present embodiment, as shown in FIG. 6, the operation member E is between the state where the annular piston E3 is separated from the second check valve seat 54 and the time when the annular piston E3 is seated on the second check valve seat 54. As a result, the pump chamber R becomes negative pressure, and as shown in FIG. 7, back suction (back suction via liquid passage) occurs from the inner cylinder portion 50 to the pump chamber R through the liquid passage hole 45. It is configured as follows. For this purpose, the first check valve body 23, which is a valve plate, is moved from the position where the annular piston E 3 is separated from the second check valve seat 54 to the second check valve seat 54. The elasticity of the elastic piece may be designed so as to substantially close the valve hole of the stop valve seat 23.

  Furthermore, the operating member E rises, whereby the negative pressure in the pump chamber R increases, and the second check valve V2 closes. When the annular seal portion 50c reaches the vicinity of the height h1 at the lower end of the communication recess 36, the interior of the stem E1 and the interior of the pump chamber R communicate with each other via the communication recess 36, and as shown by the arrow in FIG. The liquid inside is sucked back into the pump chamber R via the communication recess 36 (back suction via the communication recess). At this stage, the elastic piece 37 of the check valve member D still holds the first check valve body 38 in the closed position of the first check valve seat 23 against the negative pressure in the pump chamber R. Therefore, all of the negative pressure in the pump chamber R contributes to the back suction via the communication recess 36.

  As shown in FIG. 8, the back suction via the communication recess described above continues until the annular seal portion 50 c approaches the vicinity of the height h <b> 2 at the upper end of the communication recess 36 as the operating member E rises.

After the annular seal portion 50c passes through the place where the communication recess 36 is formed, the negative pressure inside the pump chamber R becomes larger than the elastic force of the elastic piece 37 supporting the first check valve body 38, and the first check valve body. 38 rises. As a result, the first check valve V1 is opened and the second check valve V2 is closed as shown in FIG. 10, and the liquid in the container is introduced into the pump chamber R through the first check valve V1. Is done.

  It should be noted that the relationship between the back suction via the liquid passage hole and the back suction via the communication recess described in the present embodiment is merely a preferred example, and can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 ... Pump A ... Mounting cap 10 ... Cylindrical wall part 11 ... Top wall part 12 ... Cover cylinder part B ... Cylinder 20 ... Flange 21 ... Peripheral wall part 21a ... 1st surrounding wall part 21b ... 2nd surrounding wall part 22 ... Bottom wall part 23 ... First check valve seat 24 ... Outside air introduction hole 25 ... Pipe fitting cylinder part 26 ... Suction pipe C ... Auxiliary member
30 ... Installation cylinder part 30a ... Gutter part 30b ... Inward flange-like wall part 31 ... Auxiliary cylinder part
D: Check valve member
33 ... Ring tube portion 33a ... Liquid passage 34 ... Top plate portion 35 ... Filling rod portion 36 ... Communication recess 37 ... Elastic piece 38 ... First check valve body E ... Actuating member E1 ... Stem 41 ... Outer tube portion 42 ... Stem Main body 42a ... Locking portion 42b ... Engaging groove 43 ... Outward flange portion 45 ... Fluid passage hole E2 ... Piston guide 50 ... Inner tube portion 50a ... Locked portion 50b ... Lower portion 50c ... Ring seal portion 51 ... Ring base 51a ... Tapered inner peripheral portion 51b ... Intermediate portion 51c ... Outer peripheral portion 52 ... Leg portion 53 ... Guide protrusion 54 ... Second check valve seat E3 ... Annular piston 60 ... Internal sliding portion 61 ... External sliding portion 62 ... Connection Part E4: Discharge head 70 ... Vertical cylinder 71 ... Top plate 72 ... Outer peripheral wall 74 ... Nozzle 75 ... Discharge port 76 ... Auxiliary wall part E5 ... Coil fastener 80 ... Base cylinder part 80a ... Engaging convex part 81 ... Detaching part F ... Coil spring m ... Suction port p ... packing R ... pump chamber V1 ... first check valve V2 ... second check valve 100 ... container body 101 ... mouth neck

Claims (4)

An outward flange (20) for locking to the upper surface of the mouth / neck portion of the container body is attached to the upper end portion of the peripheral wall portion (21), and the inward flange projecting inward from the lower end of the peripheral wall portion (21) A cylinder (B) having a flange hole in the bottom wall portion (22) as a suction port (m), and a first check valve seat (23) provided around the hole edge;
A check valve member (1) having a first check valve body (38) disposed in the lower portion of the cylinder (B) and forming a first check valve (V1) together with the first check valve seat (23). D) and
An actuating member (E) inserted in the cylinder (B) with the lower half thereof being vertically biased so as to be movable up and down;
A coil spring (F) interposed between the outer surface of the upper half of the actuating member (E) and the upper inner surface of the peripheral wall (21) of the cylinder (B) as an upward biasing means for the actuating member (E); Comprising
Actuating member (E)
A piston guide comprising an annular base (51) having a top surface as a second check valve seat (54) at the lower end of a vertically oriented inner cylinder (50) having a fluid passage hole (45) in the lower half. (E2),
It has a stem body (42) fitted to the upper half of the inner cylinder part (50), and the outer cylinder part (41) is suspended from the stem body (42) via an outward flange part (43). The stem (E1)
It is inserted between the inner cylinder part (50) and the annular base (51), and can be moved up and down relative to the piston guide (E2) and the stem (E1) so as to fit on the inner surface of the peripheral wall part of the cylinder (B). And an annular piston (E3) forming a second check valve (V2) together with a second check valve seat (54) of the annular base (51);
A discharge head (E4) with a nozzle (74) attached to the top of the stem (E1),
Due to the lowering of the operating member (E), the inside of the pump chamber (R) formed by the cylinder (B) portion between the first check valve (V1) and the second check valve (V2) is increased in pressure. 1 When the check valve (V1) is closed, the annular piston (E3) rises relative to the piston guide (E2) and the second check valve (V2) opens, and passes through the second check valve. As a result, the liquid in the pump chamber (R) is discharged from the discharge head (E4), and as the operating member rises, the inside of the pump chamber (R) becomes negative pressure and the piston piston (E2) has an annular piston. (E3) is relatively lowered and the second check valve (V2) is closed, and the first check valve (V1) is opened and passes through the first check valve from the suction port (m). It is configured to suck liquid into the pump chamber (R),
The check valve member (D) is fitted in the lower part of the cylinder (B) by being fitted to the inner surface of the cylinder,
While the check valve member (D) erects the filling rod portion (35) that enters the inner cylinder portion (50), the filling rod portion (35) and the liquid are formed on the inner surface of the lower end portion of the inner cylinder portion (50). An annular seal portion (50c) is formed in close contact with the nozzle (74) as the positional relationship between the inner cylinder portion (50) and the filling rod portion (35) changes as the operating member (E) moves up and down. After discharging the liquid from the nozzle (74), the liquid in the nozzle (74) is sucked back to the stem (E1) side,
Further, a communication recess (36) is formed in a part of the filling rod portion (35) in the vertical direction, and when the annular seal portion (50c) passes through the communication recess formation portion, the pump chamber (R) and the inner cylinder portion. (50) A discharge pump for mounting a liquid container, wherein the discharge pump is formed so as to communicate with a communication recess.   When the actuating member (E) is lowered, the first check valve (V1) is closed and the second check valve (V2) is opened so that the liquid flows out of the pump chamber (R), and the actuating member (E) As the second check valve (V2) closes due to the rise, the first check valve (V1) opens and the operation member (E) starts to rise during the process of sucking liquid into the pump chamber (R). The liquid is sucked back from the stem (E1) side to the pump chamber (R) side through the liquid passage hole (45) by the negative pressure of the pump chamber (R) from the start until the second check valve (V2) is closed. The discharge pump for mounting a liquid container according to claim 1, wherein the stroke is performed.   In the process of raising the actuating member (E), the portion where the communication recess (36) is formed is designed so that backsuction is performed via the communication recess (36) even after the second check valve (V2) is closed. The liquid container mounting pump according to claim 2, wherein the liquid container mounting pump is provided. The check valve member (D) has a ring cylinder part (33) fitted to the lower part of the peripheral wall part (21) of the cylinder (B), and the inner part from the inner surface of the lower half part of the ring cylinder part (33). A plurality of elastic pieces (37) projecting in the direction support the first check valve body (38), and connect the peripheral edge of the top plate (34) to the upper end of the ring cylinder (33). And
The said filling rod part (35) is arrange | positioned in the fixed position inside a cylinder (B) by standing up from the center part of the said top-plate part (34), The Claim 1 to Claim characterized by the above-mentioned. 4. The liquid container mounting pump according to any one of 3 above.