JP7094200B2 - Quantitative dispenser - Google Patents

Description

The present invention relates to a quantitative dispenser.

Conventionally, the quantitative dispenser described in Patent Document 1 below has been known. This quantitative dispenser is communicated with the cylinder part, the piston part that can slide in the cylinder axial direction along the inner peripheral surface of the cylinder part, the piston operation part that operates the piston part, and the liquid chamber in the cylinder part. It has a cylindrical suction part, a suction valve that is arranged inside the suction part and can be opened and closed in conjunction with the pull-back operation of the piston part, and a discharge port that discharges the contents, and is on the side of the cylinder part. In addition to protruding toward the direction, it is arranged inside the cylindrical nozzle part that is directly connected to the cylinder part and communicated with the liquid chamber, and can be opened and closed in conjunction with the pushing operation of the piston part. It is equipped with a discharge valve.
In this fixed-quantity dispenser, when the piston operation part is pushed down and the push-down is released, the inside of the cylinder part becomes negative pressure due to the pull-back operation of the piston part, the suction valve is opened, and the suction part and the cylinder part communicate with each other. , The contents are sucked into the cylinder part from the suction part. When the piston operation portion is pushed down in this state, the discharge valve is opened, the cylinder portion and the nozzle portion communicate with each other, and the contents sucked into the cylinder portion are discharged from the nozzle portion.

Japanese Unexamined Patent Publication No. 2018-2230

In such a quantitative dispenser, various quantitative dispensers having different injection amounts are required depending on the intended use and the like. In the conventional fixed-quantity dispenser, when changing the set value of the dispensed amount (preset of the dispensed amount), it is necessary to newly manufacture and assemble each part such as the cylinder part and the piston operation part. .. However, since each part of the quantitative dispenser contains many seals and fittings, when a new part is manufactured, there are many inspections and confirmation items such as the seals and fittings, and the manufacturing cost increases. In addition, there are problems such as an extension of the production period.

The present invention has been made in view of such circumstances, and an object of the present invention is to make it possible to easily manufacture a quantitative dispenser having a different set value of a dispenser amount.

(1) The quantitative dispenser according to the present invention is arranged at a cylinder for temporarily accommodating the contents to be dispensed and at the mouth of a container connected to the cylinder and accommodating the contents. A suction cylinder that can be switched between communication and disconnection with the cylinder according to an increase or decrease in the internal pressure of the cylinder, and a suction cylinder that is directly connected to the cylinder and extends laterally, and the cylinder and the cylinder according to an increase or decrease in the internal pressure of the cylinder. An injection cylinder whose communication and shielding can be switched, a ridged cylinder-shaped push head which is arranged so as to be movable downward while being urged upward to the cylinder, and a push head which is arranged in the cylinder and is linked to the push head. A piston portion that moves up and down in the cylinder, a regulation portion that is fixed to the cylinder and regulates the amount of upward movement of the piston portion, and at least one of the piston portion and the regulation portion are attached to the above. It is characterized by including a spacer that changes the position of the top dead point of the piston portion downward.

According to the quantitative dispenser according to the present invention, the position of the top dead center of the piston portion is lowered by attaching a spacer to at least one of the regulating portions that regulate the upward movement amount of the piston portion in the cylinder. , The set value of the injection amount can be reduced. This eliminates the need to newly manufacture each of the main parts (cylinder, etc.) of the quantitative dispenser, and the existing parts can be diverted, yet the dispensing accuracy can be obtained at the same level as before. In addition, since the spacer is structurally simple, the manufacturing cost and the manufacturing period can be significantly improved as compared with the case where each of the main parts of the quantitative dispenser is newly manufactured.

(2) At least one of the piston portion and the restricting portion has a mounted portion extending toward the other, and the spacer is connected to the mounted portion that can be mounted on the mounted portion and the mounting portion. It is provided, has a contact portion extending toward the other and capable of contacting the other, and the contact portion may have the same shape as the mounted portion.

In this case, another spacer mounting portion can be mounted on the spacer contact portion, and the spacers can be connected to each other. This makes it possible to add a spacer according to the set value of the injection amount and gradually change the position of the top dead center of the piston portion downward.

(3) The piston portion has a piston body slidably arranged in the cylinder and a piston support portion fixed to the push head and supporting the piston body in the cylinder. The spacer may be disposed between the restricting portion and the piston support portion, and may be attached to the restricting portion.

In this case, the spacer is mounted on the immovable restricting portion and is disposed between the spacer and the piston support portion, so that the spacer mounting is stable and the piston body is detached from the piston support portion. It is also possible to suppress problems such as pistons.

According to the quantitative dispenser according to the present invention, it is possible to easily manufacture a quantitative dispenser having a different set value of the dispensed amount.

It is sectional drawing of the quantitative dispenser which concerns on one Embodiment of this invention. It is a partial cross-sectional view which shows the regulation part provided in the fixed quantity dispenser shown in FIG. 1, and the spacer attached to the regulation part. It is sectional drawing which shows the position of the top dead center of a piston when a spacer is not attached to the fixed quantity dispenser shown in FIG. 1. It is a partial cross-sectional view which shows the modification of the spacer which concerns on one Embodiment of this invention. It is a partial cross-sectional view which shows the modification of the spacer which concerns on one Embodiment of this invention.

Hereinafter, the quantitative dispenser according to the embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the quantitative dispenser 1 of the present embodiment is attached to the mouth portion 2a of the container 2 containing the contents. The fixed-quantity dispenser 1 includes a cylinder 10, a suction cylinder 20, a dispenser cylinder 30, a push head 40, a piston portion 50, a regulation portion 70, and a spacer 80. The contents contained in the container 2 include, for example, liquids having a relatively low viscosity such as liquid beverages such as water and alcoholic beverages, but are not limited to liquids having a low viscosity.

The cylinder 10 has a bottomed cylinder shape, the suction cylinder 20 has a tubular shape, the push head 40 has a ridged cylinder shape, and the central axes of the cylinders 10 are located on a common axis. Hereinafter, this common axis is referred to as an axis O, and the pressing head 40 side (upper side in FIG. 1) is upward and the opposite side (suction cylinder 20 side (lower side in FIG. 1)) is downward along the axis O direction. do. Further, the axis O direction is the vertical direction, the direction intersecting the axis O when viewed from the axis O direction is the radial direction, and the direction around the axis O is the circumferential direction.

The container 2 is a container for accommodating the contents, for example, a synthetic resin bottle such as a glass bottle or a PET bottle. The mouth portion 2a of the container 2 has a cylindrical shape extending in the vertical direction with the axis O as the central axis, and a male screw is formed on the outer peripheral surface of the mouth portion 2a.

The cylinder 10 is arranged above the mouth portion 2a of the container 2 and temporarily accommodates the contents to be poured out. The cylinder 10 has a bottomed cylindrical shape, and includes a cylinder main body 11 for accommodating (weighing) the contents. A suction communication port 11a communicating with the suction cylinder 20 is formed in the radial center portion on the lower surface of the cylinder main body portion 11, and communicates with the ejection cylinder 30 at a position separated radially outward from the suction communication port 11a. A pouring communication port 11b is formed.

The suction cylinder 20 is connected to the cylinder 10 and is arranged at the mouth portion 2a of the container 2, and communication and disconnection with the cylinder 10 are switched according to an increase or decrease in the internal pressure of the cylinder 10. The suction cylinder 20 includes a mounting cap 21 mounted on the outside of the mouth portion 2a of the container 2, an inner plug 22 mounted on the inside of the mouth portion 2a, and a fitting cylinder portion 23 to which the mounting cap 21 is fitted. A connection cylinder portion 24 communicating with the inside of the cylinder main body portion 11, a tube 25 connected to the connection cylinder portion 24, and a suction valve 26 for opening and closing the suction communication port 11a are provided.

The mounting cap 21 has a cylindrical shape and extends in the vertical direction with the axis O as the central axis. A female screw screwed into a male screw of the mouth portion 2a is formed on the inner peripheral surface of the mounting cap 21. As a result, the mounting cap 21 is screwed to the outer peripheral surface of the mouth portion 2a.

The inner plug 22 has a cylindrical shape and is arranged coaxially with the mouth portion 2a with the axis O as the central axis. A flange portion 22a projecting outward in the radial direction is formed on the outer peripheral surface of the inner plug 22. The flange portion 22a is an annular plate portion formed over the entire circumference in the circumferential direction. The flange portion 22a is a support portion that supports the inner plug 22, and is placed on the upper end opening edge of the mouth portion 2a.

The fitting cylinder portion 23 is a tubular portion continuously provided at the bottom of the cylinder main body portion 11, and extends along the vertical direction with the axis O as the central axis. The lower end portion of the fitting cylinder portion 23 is inserted inside the upper end portion of the mounting cap 21, and is undercut fitted to the upper end portion of the mounting cap 21. The lower end surface of the fitting cylinder portion 23 is placed on the flange portion 22a of the inner plug 22, and the cylinder main body portion 11 is supported by the upper end opening edge of the mouth portion 2a via the flange portion 22a.

The connecting cylinder portion 24 is a tubular portion arranged inside the fitting cylinder portion 23 in the radial direction, and extends along the vertical direction with the axis O as the central axis. The upper end portion of the connecting cylinder portion 24 is connected to the bottom portion of the cylinder main body portion 11, and the upper end opening thereof communicates with the suction communication port 11a. An inner plug 22 is fitted on the outer peripheral surface of the connecting cylinder portion 24.

The tube 25 is a tube that is inserted inside the container 2 to suck up the contents in the container 2, and is made of, for example, a flexible tube having flexibility. The tube 25 may be a simple cylindrical pipe. The lower end of the tube 25 is open to the inside of the container 2, and the upper end of the tube 25 is fitted inside the connecting cylinder portion 24 and communicates with the inside of the cylinder main body portion 11.

The suction valve 26 is a check valve that stops the outflow of the contents from the cylinder main body 11 to the connecting cylinder 24 (container 2 side), and is opened in conjunction with the pull-back operation (upward movement) of the piston 50. The suction valve 26 is a disc that is arranged inside the fitting portion 26a in the radial direction and opens and closes the suction communication port 11a and the annular fitting portion 26a fitted in the recess of the opening peripheral portion of the suction communication port 11a. It is provided with an elastically deformable elastic connecting portion 26c that intermittently connects the outer peripheral surface of the valve body portion 26b and the inner peripheral surface of the fitting portion 26a in the circumferential direction.

The dispensing cylinder 30 is directly connected to the cylinder 10 and extends laterally, and communication and shielding with the cylinder 10 can be switched according to an increase or decrease in the internal pressure of the cylinder 10. The dispensing cylinder 30 has a protruding cylinder portion 31 that protrudes laterally (in a direction intersecting the axis O) from the lower surface of the bottom portion of the cylinder main body portion 11 and communicates with the inside of the cylinder main body portion 11, and a protruding cylinder portion 31. It is provided with a nozzle portion 32 connected to the above and a discharge valve 33 disposed inside the protruding cylinder portion 31.

The nozzle portion 32 is undercut fitted to the outer peripheral surface of the protruding cylinder portion 31. The tip of the nozzle portion 32 is bent downward. The dispense valve 33 is a check valve that stops the inflow of contents and air from the inside of the dispense cylinder 30 into the cylinder main body portion 11, and is opened in conjunction with the pushing operation (downward movement) of the piston portion 50. The injection valve 33 is connected to the valve main body 33a engaged with the valve engaging portion 31a provided on the inner surface of the protruding cylinder portion 31 and the valve main body 33a, and is connected to the inner peripheral surface of the protruding cylinder portion 31. It has a valve portion 33b, which is formed in a trumpet shape in close contact with the liquid tightly over the entire circumference and can be elastically reduced in diameter.

The piston portion 50 is arranged in the cylinder 10 and moves up and down in the cylinder 10 in cooperation with the push head 40, and the piston body 50A slidably arranged in the cylinder 10 and the push. It is fixed to the head 40 and includes a piston support portion 60 that supports the piston body 50A in the cylinder 10. The piston body 50A is formed in a bottomed cylinder shape with a seal cylinder portion 51 slidably fitted in the cylinder body portion 11, and the upper end edge thereof is in the vertical direction on the inner peripheral surface of the seal cylinder portion 51. It includes a bottom plate portion 52 connected to an intermediate portion, and a mounted cylinder portion 53 that is formed in a ridged cylinder shape and extends upward from the bottom plate portion 52.

The seal cylinder portion 51, the bottom plate portion 52, and the mounted cylinder portion 53 are arranged coaxially with the axis O. The piston body 50A airtightly closes the cylinder body 11 from above. The space surrounded by the cylinder main body 11 and the piston main body 50A constitutes a storage space C for accommodating the contents sucked up from the suction cylinder 20.

Here, the regulation portion 70 is attached to the upper end portion of the cylinder main body portion 11. The restricting portion 70 includes an outer cylinder 71 that is externally fitted to the upper end of the cylinder main body 11, an inner cylinder 72 that is inserted into the upper end of the cylinder main body 11, and a guide cylinder 73 having a diameter smaller than that of the inner cylinder 72. Is equipped with. Further, the upper end portion of the outer cylinder 71 and the upper end portion of the inner cylinder 72 are connected to each other by an annular top wall plate 74. Further, the lower end portion of the inner cylinder 72 and the lower end portion of the guide cylinder 73 are connected to each other by an annular bottom wall plate 75. A cylindrical mounted portion 76 is vertically installed on the lower surface of the bottom wall plate 75, and a spacer 80 (described later) is mounted on the mounted portion 76.

The pressing head 40 is arranged on the upper part of the cylinder 10 so as to be movable downward in an upwardly urged state. The pressing head 40 is formed in a climax cylinder shape and is extrapolated to the cylinder main body 11. The push head 40 is configured to be movable up and down with respect to the cylinder 10, and is for the operator to perform a push-down operation. The push outer cylinder 41 externally inserted into the outer cylinder 71 of the regulation unit 70 and the push outer cylinder. A top wall portion 42 that closes the upper end opening of 41 is provided.

On the lower surface of the top wall portion 42, a cylindrical spring receiving portion 44 that receives a coil spring 43 (a urging member) of an elastic body is vertically installed. The coil spring 43 is arranged between the top wall portion 42 of the push head 40 and the bottom wall plate 75 of the regulation portion 70. The coil spring 43 urges the pressing head 40 upward against the regulating portion 70.

A support cylinder portion 45 for supporting the piston support portion 60 is provided inside the top wall portion 42 in the radial direction with respect to the spring receiving portion 44. The support cylinder portion 45 is a cylinder suspended from the lower surface of the top wall portion 42, and a fitting protrusion 45a is formed on the inner peripheral surface of the support cylinder portion 45. Further, on the outer peripheral surface of the support cylinder portion 45, a plurality of guide grooves 45b are formed so as to extend along the vertical direction and at intervals in the circumferential direction.

On the inner peripheral surface of the guide cylinder 73 of the restricting portion 70 into which the support cylinder portion 45 is inserted, a plurality of ribs 73a extending in the vertical direction are formed at intervals in the circumferential direction. These plurality of ribs 73a are inserted into the plurality of guide grooves 45b of the support cylinder portion 45. This allows the push head 40 to move relative to the restricting unit 70 in the vertical direction, while restricting the relative rotation of the push head 40 in the circumferential direction.

The piston support portion 60 is fixed to the push head 40 and supports the piston body 50A inside the cylinder 10. The piston support portion 60 includes a ridged cylindrical fitting cylinder portion 61 fitted to the support cylinder portion 45 of the push head 40, and a support flange portion protruding radially outward from the lower end portion of the fitting cylinder portion 61. 62 and.

The fitting cylinder portion 61 is a tubular portion fitted inside the support cylinder portion 45 in the radial direction, and extends along the vertical direction with the axis O as the central axis. On the outer peripheral surface of the fitting cylinder portion 61, a fitting groove 61a in which the fitting projection 45a of the support cylinder portion 45 is undercut fitted is formed. The upper end portion of the fitting cylinder portion 61 extends to the top wall portion 42 of the push head 40, and forms the upper surface of the push head 40 together with the top wall portion 42. On the other hand, the lower end portion of the fitting cylinder portion 61 extends below the lower end portion of the support cylinder portion 45.

The support flange portion 62 connected to the lower end of the fitting cylinder portion 61 extends radially outward to a position where it can face the restricting portion 70 in the vertical direction. An engaging convex portion 61b is formed on the inner peripheral surface of the lower end opening of the fitting cylinder portion 61. The engaging convex portion 61b is vertically engaged with the engaged convex portion 53a provided on the outer peripheral surface of the mounted cylinder portion 53 of the piston body 50A inserted into the lower end opening of the support cylinder portion 45. .. The lower surface of the support flange portion 62 is arranged in the bottom plate portion 52 of the piston body 50A and is in contact with the upper surface of the bottom plate portion 52. As a result, the piston body 50A is linked to the vertical movement of the push head 40 via the piston support portion 60.

The spacer 80 is attached to the regulating portion 70 and changes the position of the top dead center of the piston portion 50 downward. The restricting portion 70 is formed with a mounted portion 76 extending from the lower surface of the bottom wall plate 75 toward the upper surface of the support flange portion 62 of the piston support portion 60. The spacer 80 has a mounting portion 81 that can be mounted on the mounted portion 76, and a contact portion 82 that is connected to the mounting portion 81 and extends toward the piston support portion 60 and can abut on the upper surface of the support flange portion 62. , Is equipped.

As shown in FIG. 2, the mounted portion 76 of the restricting portion 70 is a tubular portion extending downward from the lower surface of the bottom wall plate 75, and the outer peripheral surface of the mounted portion 76 has a covering projecting outward in the radial direction. An engaging protrusion 76a is formed. The engaged protrusion 76a is formed intermittently or continuously in the circumferential direction of the outer peripheral surface of the mounted portion 76. The engaged protrusions 76a are formed in two rows at intervals in the vertical direction of the outer peripheral surface of the mounted portion 76.

The mounting portion 81 of the spacer 80 is arranged on the radial inside of the first peripheral wall 81a facing the outer peripheral surface of the mounted portion 76 and the first peripheral wall 81a, and faces the inner peripheral surface of the mounted portion 76. It includes an 81b and an annular bottom wall 81c that radially connects the first peripheral wall 81a and the second peripheral wall 81b. The first peripheral wall 81a, the second peripheral wall 81b, and the annular bottom wall 81c form a bottomed annular engaging groove into which the mounted portion 76 can be inserted from above.

On the inner peripheral surface of the first peripheral wall 81a, an engaging projection 81a1 protruding inward in the radial direction is formed. The engaging protrusions 81a1 are formed intermittently or continuously in the circumferential direction of the inner peripheral surface of the first peripheral wall 81a. Similar to the engaged projections 76a, the engaging projections 81a1 are formed in two rows at intervals in the vertical direction of the inner peripheral surface of the first peripheral wall 81a. The spacer 80 is attached to the regulating portion 70 by engaging (riding) the lower surface of the engaging projection 81a1 with the upper surface of the engaged projection 76a.

The second peripheral wall 81b is not formed with the engaging projection 81a1 like the first peripheral wall 81a, and the upper end surface of the second peripheral wall 81b is slightly lower than the upper end surface of the first peripheral wall 81a. The lower end surface of the mounted portion 76 mounted on the spacer 80 abuts on the upper surface of the annular bottom wall 81c (see FIG. 1). On the lower surface of the annular bottom wall 81c, a contact portion 82 is continuously provided on the inner side in the radial direction from the first peripheral wall 81a and the outer side in the radial direction from the second peripheral wall 81b.

The contact portion 82 is a cylindrical portion extending downward from the lower surface of the annular bottom wall 81c. The radial position of the abutting portion 82 coincides with the radial position of the mounted portion 76. As shown in FIG. 1, the lower end surface of the contact portion 82 faces the upper surface of the support flange portion 62 of the piston support portion 60 in the vertical direction and is capable of contacting the lower end surface. That is, when the lower end surface of the contact portion 82 abuts on the upper surface of the support flange portion 62, further upward movement of the piston support portion 60 is restricted.

Next, a method of injecting the contents using the above-mentioned quantitative dispenser 1 will be described.
As shown in FIG. 1, when the pressing head 40 is pushed down against the upward urging force of the coil spring 43, the piston portion 50 moves downward with respect to the cylinder 10 in conjunction with the downward movement of the pushing head 40. Then, when the push-down of the push head 40 is released, the push head 40 moves upward by the upward urging force of the coil spring 43, and the piston portion 50 moves upward with respect to the cylinder 10 in conjunction with the upward movement of the push head 40. do.

The piston portion 50 is fixed to the push head 40 via the piston support portion 60 and is linked to the upward movement of the push head 40. Therefore, the piston portion 50 moves upward until the piston support portion 60 comes into contact with the spacer 80 mounted on the regulation portion 70. At this time, a negative pressure is generated in the storage space C in the cylinder main body 11 according to the stroke amount of the pressing head 40.

As a result, the suction valve 26 of the suction cylinder 20 opens the suction communication port 11a to communicate the inside of the cylinder 10 and the inside of the suction cylinder 20. Then, the contents in the container 2 are sucked up into the storage space C through the suction cylinder 20 and the suction valve 26. The inflow amount of the contents into the storage space C at this time corresponds to the negative pressure generated in the storage space C, that is, the stroke amount. At this time, the dispensing valve 33 arranged inside the dispensing cylinder 30 closes the inside of the dispensing cylinder 30 to block communication with the inside of the cylinder 10.

When the push head 40 is pushed down again in this state, the inside of the cylinder body 11 becomes a positive pressure, and the dispensing valve 33 opens the inside of the dispensing cylinder 30 to open the inside of the cylinder 10 and the inside of the dispensing cylinder 30. Communicate. As a result, the contents stored in the storage space C of the cylinder main body 11 are poured out from the pouring cylinder 30. At the time of pouring, the suction valve 26 closes the inside of the suction cylinder 20 to shield the cylinder 10 and the suction cylinder 20. Therefore, the contents in the cylinder main body 11 are not returned to the suction cylinder 20.
As described above, the contents can be dispensed from the quantitative dispenser 1.

Next, with reference to FIG. 3, it is compared with the injection amount when the spacer 80 is not attached.
As shown in FIG. 3, when the spacer 80 is not attached to the restricting portion 70, when the pressing down of the pressing head 40 is released, the piston portion 50 has the piston support portion 60 at the lower end of the attached portion 76 of the restricting portion 70. Move upward until it abuts. The position of the top dead center of the piston portion 50 at this time is T1. When the position of the top dead center of the piston portion 50 is T1, the set value (maximum) of the injection amount of the quantitative dispenser 1 is, for example, 50 ml (milliliter).

On the other hand, when the spacer 80 is mounted on the regulating portion 70, the piston portion 50 abuts on the lower end of the spacer 80 extending below the mounted portion 76 of the regulating portion 70, so that the position of the top dead center of the piston portion 50 is reached. Is changed downward from T1 to T2. When the position of the top dead center of the piston portion 50 is T2, the set value of the injection amount of the quantitative dispenser 1 is, for example, 45 ml. In this way, by adding the spacer 80, the set value of the injection amount of the quantitative dispenser 1 can be reduced by 5 ml.

Further, as shown in FIG. 4, by further adding the spacer 80, the set value of the injection amount of the quantitative dispenser 1 can be further reduced. The spacer 80 shown in FIG. 4 has a contact portion 82 having the same shape as the mounted portion 76 of the regulation portion 70. Therefore, it is possible to mount another spacer 80 mounting portion 81 on the contact portion 82. Specifically, the contact portion 82 is formed with a second engaged protrusion 82a having the same shape and arrangement as the engaged protrusion 76a of the mounted portion 76. As shown in FIG. 4, by connecting the spacers 80, the set value of the injection amount of the quantitative dispenser 1 can be reduced by 5 ml.

Further, the length L in the vertical direction of the contact portion 82 that determines the set value of the pouring amount can be appropriately changed. For example, as shown in FIG. 5, if the length L of the contact portion 82 is increased, the set value of the injection amount of the quantitative dispenser 1 can be reduced by 10 ml. Since the length L of the contact portion 82, which is the lower half of the spacer 80, can be changed by exchanging the cavity or core of the mold for molding the spacer 80 with resin, the mold cost can be expected to be reduced. Further, the short spacer 80 of the contact portion 82 (for example, for adjusting 5 ml) and the long spacer 80 of the contact portion 82 (for example, for adjusting 10 ml) may be combined and connected. In this case, if the molding color of the spacer 80 is changed according to the length of the contact portion 82, it is possible to prevent mistaken assembly during manufacturing.

As described above, according to the quantitative dispenser 1 of the present embodiment, by attaching the spacer 80 to the regulating portion 70 that regulates the upward movement amount of the piston portion 50 in the cylinder 10, the piston portion 50 is killed at the top. The position of the point can be lowered and the set value of the injection amount can be reduced. As a result, it is not necessary to newly manufacture each of the main parts (cylinder 10 and the like) of the quantitative dispenser 1, the existing parts can be diverted, and the dispensing accuracy can be obtained at the same level as the conventional one. Further, since the spacer 80 is structurally simple, the manufacturing cost and the manufacturing period can be significantly improved as compared with the case where each of the main parts of the quantitative dispenser 1 is newly manufactured.

Therefore, according to the above-described embodiment, the cylinder 10 is arranged in a cylinder 10 for temporarily accommodating the contents to be poured, and the mouth portion 2a of the container 2 connected to the cylinder 10 and accommodating the contents. The suction cylinder 20 is directly connected to the cylinder 10 and extends laterally, and the suction cylinder 20 is switched between communication and disconnection with the cylinder 10 according to the increase / decrease in the internal pressure of the cylinder 10. An injection cylinder 30 whose communication and shielding with the cylinder 10 can be switched, a ridged cylinder-shaped push head 40 which is arranged so as to be movable downward in an upwardly urged state on the cylinder 10, and an arrangement in the cylinder 10. A piston portion 50 that moves up and down in the cylinder 10 in cooperation with the push head 40, a regulation portion 70 that is fixed to the cylinder 10 and regulates the amount of upward movement of the piston portion 50, and a piston portion that is attached to the regulation portion 70 and moves up and down. By adopting a configuration including a spacer 80 that changes the position of the top dead point of 50 downward, it becomes possible to easily manufacture a quantitative dispenser 1 having a different set value of the dispensing amount. ..

Further, in the present embodiment, the regulating portion 70 has a mounted portion 76 extending toward the piston portion 50, and the spacer 80 is connected to the mounted portion 81 that can be mounted on the mounted portion 76 and the mounting portion 81. The contact portion 82 extends toward the piston portion 50 and has a contact portion 82 that can contact the piston portion 50, and the contact portion 82 has the same shape as the mounted portion 76 as shown in FIG. is doing. According to this configuration, another spacer 80 mounting portion 81 can be mounted on the contact portion 82 of the spacer 80, and the spacers 80 can be connected to each other. As a result, the spacer 80 can be added according to the set value of the injection amount, and the position of the top dead center of the piston portion 50 can be gradually changed downward.

Further, in the present embodiment, as shown in FIG. 1, the piston portion 50 is fixed to the piston main body 50A slidably arranged in the cylinder 10 and the push head 40, and the piston main body 50A is fixed in the cylinder 10. The spacer 80 is disposed between the regulating portion 70 and the piston supporting portion 60, and is attached to the regulating portion 70. According to this configuration, the spacer 80 is mounted on the immovable restricting portion 70 and is disposed between the spacer 80 and the piston support portion 60, so that the spacer 80 is mounted stably and the piston support portion 60 is mounted. It is also possible to suppress problems such as the piston body 50A being detached from the piston body 50A.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment and includes design changes and the like within a range not deviating from the gist of the present invention.

For example, in the above-described embodiment, the configuration in which the spacer 80 is mounted on the regulating portion 70 has been described, but the spacer 80 may be mounted on the piston portion 50. For example, if a cylindrical portion having a shape in which the mounted portion 76 is turned upside down is formed on the upper surface of the support flange portion 62 of the piston support portion 60, the spacer 80 can be mounted on the piston support portion 60. Further, the spacer 80 may be configured to be mounted on both the regulating portion 70 and the piston portion 50. The spacer 80 may be mounted not only on the piston support portion 60 but also on the piston body 50A1.

In addition, it is possible to appropriately replace the constituent elements in the above-described embodiment with well-known constituent elements without departing from the spirit of the present invention, and the above-mentioned modifications may be appropriately combined.

1 Quantitative dispenser 2 Container 2a Mouth 10 Cylinder 20 Suction cylinder 30 Injection cylinder 40 Pushing head 50 Piston part 50A Piston body 60 Piston support part 70 Restricting part 76 Mounting part 80 Spacer 81 Mounting part 82 Contact part C Storage Space O axis

Claims (2)

A cylinder that temporarily accommodates the contents to be dispensed, and
A suction cylinder that is connected to the cylinder and is arranged at the mouth of a container in which the contents are housed so that communication and disconnection with the cylinder can be switched according to an increase or decrease in the internal pressure of the cylinder.
A pouring cylinder that is directly connected to the cylinder and extends laterally, and communication and shielding with the cylinder can be switched according to an increase or decrease in the internal pressure of the cylinder.
An eclipse cylinder-shaped push head arranged so as to be movable downward in an upwardly urged state on the cylinder,
A piston portion that is disposed in the cylinder and moves up and down in the cylinder in cooperation with the push head.
A regulating unit fixed to the cylinder and regulating the amount of upward movement of the piston portion,
A spacer, which is attached to at least one of the piston portion and the regulation portion and changes the position of the top dead center of the piston portion downward, is provided.
At least one of the piston portion and the restricting portion has a mounted portion extending toward the other.
The spacer is
A mounting portion that can be mounted on the mounted portion and
It has an abutting portion that is connected to the mounting portion, extends toward the other, and is capable of contacting the other.
The abutting portion is a quantitative dispenser having the same shape as the mounted portion . The piston part is
A piston body slidably arranged in the cylinder and
It has a piston support portion that is fixed to the push head and supports the piston body in the cylinder.
The quantitative dispenser according to claim 1 , wherein the spacer is arranged between the restricting portion and the piston support portion and is attached to the restricting portion.

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