JP2001263260A - Pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump capable of high speed operation, easy in miniaturization and easy in driving control. SOLUTION: This pump 1 has an inlet valve rod 35 and an outlet valve rod 25 for opening and closing an inlet valve and an outlet valve, a discharge member rod 45 for discharging liquid and coils 13 and 14 for actuating the respective rods. When an electric current is made to flow to the coil 13, respective armatures 21 and 31 approach each other, the rod 35 moves in the valve closing direction, and the rod 25 moves in the valve opening direction. When the electric current is made to flow to the coil 14, a discharge member moves in the liquid sucking direction. When turning off the coil 13, the outlet valve rod 25 moves in the valve closing direction by a first spring 23, and the inlet valve rod 35 moves in the valve opening direction by a second spring 36. When turning off the coil 14, the discharge member rod 45 moves in the liquid discharge direction by a third spring 43. The three rods can be driven by the two coils 13 and 14, miniaturization is facilitated more than when using three coils, and the driving control can be easily performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump for discharging a liquid, and more particularly to a pump used for metering and transferring a very small amount of liquid such as when sampling a liquid.

[0002]

BACKGROUND ART As a pump for measuring and discharging a liquid,
Although a device using a check valve is known, in this check valve system, the liquid is moved by a water hammer or the like, so that the accuracy of the liquid discharge amount cannot be made very high. For this reason, in recent years, a pump has been used which is provided with a forced valve of an inlet valve and an outlet valve so that the liquid does not move even if a water hammer or the like occurs and the accuracy of the discharge amount can be improved. Such pumps
Since liquids such as chemicals, electrolytes, additives, and adhesives can be ejected and transferred in a predetermined amount even in a very small amount, the use thereof is expanding in various places such as manufacturing factories.

In a pump provided with an inlet valve and an outlet valve, an inlet valve opening / closing member and an outlet valve opening / closing member for opening and closing these valves and a volume of a measuring chamber defined by these valves are changed. And a discharge member for sucking and discharging the liquid. The driving of these three members is generally performed by air driving using compressed air or driving by a motor and a cam.

[0004]

However, in the case of air drive, since it takes time to supply and discharge air, it takes a relatively long time to reciprocate each member once, and high-speed operation cannot be performed. There is a problem that it is difficult to reduce the tact time when manufacturing by discharging a small amount of adhesive or the like for each product. In addition, the motor and cam drive have relatively large drive units. For example, in the case of an application in which a liquid is ejected while a pump is attached to a tip of an arm robot and moved, there is a limit on the size. , There was a problem that it was difficult to use. Further, an electromagnetic drive type in which three solenoids (coils) are arranged corresponding to the respective members and the respective solenoids are individually controlled to drive the respective members can also be adopted. In this case, three coils are arranged. Therefore, there is a problem that it is difficult to reduce the size, and it is necessary to control each of the three coils individually, which complicates the control.

An object of the present invention is to enable high-speed operation,
An object of the present invention is to provide a pump that can be easily miniaturized and has a simple drive control.

[0006]

SUMMARY OF THE INVENTION A pump according to the present invention comprises a pump section having an inlet valve, an outlet valve and a metering chamber, an inlet valve opening / closing member for opening and closing the inlet valve, and an outlet valve opening / closing member for opening and closing the outlet valve. And a discharge member that discharges a liquid by changing the volume of the measuring chamber, and in a valve closing direction that closes one of the inlet valve opening / closing member and the outlet valve opening / closing member when a current is applied. A valve opening / closing coil that moves and moves the other in a valve opening direction to open a valve; and a liquid suction direction that causes the discharge member to reduce or increase the volume of the measurement chamber when the current flows. The discharge / suction coil which moves to any one of the above, and an opening / closing member which is moved in the valve opening direction by the valve opening / closing member of the inlet valve opening / closing member and the outlet valve opening / closing member, is supplied with electric current to the valve opening / closing coil. Is not flowing, A first urging member that moves in a valve closing direction, and an opening / closing member that is moved in the valve closing direction by the valve opening / closing coil of the inlet valve opening / closing member and the outlet valve opening / closing member. A second biasing member that moves in the valve opening direction to open the valve when no current is flowing through the valve;
A third urging member configured to move the discharge member in the liquid discharge direction or the liquid suction direction when the electric current is not flowing through the discharge suction coil. It is a feature. In addition, the valve closing direction,
The valve opening direction, the liquid suction direction, and the liquid discharge direction can be set as appropriate. For example, the valve opening direction and the liquid suction direction may be matched, and the valve closing direction and the liquid discharge direction may be matched.

In the present invention, the inlet valve and the outlet valve operate in conjunction with each other so that, when one of them is closed, the other is opened basically, the inlet valve and the outlet valve are connected to one coil and one outlet. It is configured to be driven by a biasing member such as a coil spring and to drive the remaining discharge member by the second coil and the biasing member. For this reason, even if three driving members of each opening / closing member and the discharging member are provided, the coil is 2
Therefore, the size can be easily reduced as compared with the conventional example using three solenoids, and the drive control can be simplified.

Further, since each opening / closing member and the discharge member are driven by using the coil, high-speed driving can be performed as compared with air driving, and the tact time can be shortened. In addition, if driven by a solenoid, the drive unit can be reduced in size compared to the case of driving by a motor and a cam. For example, it can be applied to an application in which a liquid is ejected while a pump is attached to the tip of an arm robot and moved. It can be used for various parts, and the usability can be improved.

At this time, when a current is passed through the valve opening / closing coil, the inlet valve opening / closing member moves in the valve closing direction, and the outlet valve opening / closing member moves in the valve opening direction. The discharge member is configured to move in the liquid suction direction when a current is applied to the suction coil, and the first biasing member is configured to open and close the outlet valve when no current is applied to each coil. The member is moved in the valve closing direction, the second urging member moves the inlet valve opening / closing member in the valve opening direction, and the third urging member moves the discharge member in the liquid discharging direction. Is preferred.

With this configuration, in a state in which no current is applied to each coil, the inlet valve is opened, the outlet valve is closed, and the discharge member is moved in the liquid discharge direction by each urging member. Becomes For this reason, if the state in which no current flows is set as the initial state, the outlet valve that is easily sealed can be closed in the initial state, so that it is easy to cause liquid leakage from the discharge port when the pump is not used. And reliably. Further, the discharge operation is also ended at the timing when the outlet valve is closed, so that the liquid discharged last can be desirably drained. In the initial state, the inlet valve is open, but the discharge member is in the discharge completed state,
When the switch is turned on to be in the operation state, the operation can always be started from the timing at which the ejection member moves in the liquid suction direction. Therefore, the suction operation of the liquid occurs when the pump is operated, that is, when the operation of the discharge member is controlled. Therefore, the suction time can be always constant, and the suction amount can be constant. Accuracy can be improved.

At this time, the inlet valve opening / closing member and the outlet valve opening / closing member are provided with an inlet valve armature and an outlet valve armature so as to be movable together with the respective opening / closing members, and each of these armatures is provided with a valve opening / closing coil. Are arranged in series along a magnetic path formed when a current is applied to the discharge member, and the discharge member is provided with an armature for a discharge member so as to be movable together with the discharge member. It is preferable that the coil is arranged along a magnetic path formed when a current is applied to the discharge / suction coil.

According to this structure, the armatures which are urged away from each other by the first and second urging members and are arranged separately when the electric current flows through the valve opening / closing coil. Since it is arranged in the magnetic path, it is magnetized and moves in a direction approaching each other, and moves to a position where it comes into contact with an intermediate point between the armatures that have been arranged apart. If each opening / closing member is moved in conjunction with the movement of each armature, one of the inlet valve opening / closing member and the outlet valve opening / closing member opens and closes the valve by supplying a current to the valve opening / closing coil. It moves in the valve direction and the other moves in the valve closing direction to close the valve. Therefore, since each opening / closing member can be driven with a simple configuration, the number of parts is reduced, the production efficiency is improved, and the manufacturing cost can be reduced. Further, since the armature for the ejection member is also arranged in the magnetic path, it can be driven with a simple configuration.

A discharge amount setting member is disposed on the opposite side of the discharge member armature from the pump section so as to be position-adjustable. The discharge member armature and the discharge amount setting member are connected to a discharge suction coil. The discharge amount setting member and the discharge amount setting member are arranged in series along a magnetic path formed when an electric current is applied, and the third urging member can urge the armature for the discharge member in the liquid discharge direction. A fourth urging member may be provided between the armature for the discharging member, and further urges the discharging member in the liquid suction direction and has a lower urging force than the third urging member. preferable.

According to this structure, when a current is applied to the discharge / suction coil, the armature for the discharge member and the discharge amount setting member come into close contact with each other against the urging force of the third urging member. When the armature for the discharge member and the discharge amount setting member are in close contact with each other, the function of the urging force of the third urging member is eliminated, and the armature for the discharge amount setting member and the armature for the discharge member, that is, the discharge member, is operated by the fourth urging member. It moves while being urged in the liquid suction direction. Therefore, by setting the position of the end of the movement stroke of the discharge amount setting member in the liquid suction direction with a micrometer or the like capable of contacting the discharge amount setting member, the movement stroke of the discharge member, that is, the measurement chamber is partitioned. The liquid amount (discharge amount) can be adjusted. Therefore, the discharge amount can be adjusted with high accuracy with a simple configuration.

The armature for an inlet valve is fixed to an inlet valve opening / closing member, and the armature for an outlet valve is disposed on the pump portion side of the armature for the inlet valve so as to be relatively movable with respect to each opening / closing member. The opening / closing member is provided with a locking portion with which the pump-portion-side end face of the outlet valve armature can abut, and the first biasing member can bias the outlet valve opening / closing member in the valve closing direction. The second urging member is configured to be able to urge the inlet valve opening / closing member in the valve opening direction and to have a smaller urging force than the first urging member. A fifth urging member that urges in the valve opening direction and has a lower urging force than the first urging member is provided, and when an electric current is applied to the valve opening / closing coil, the armature for the inlet valve is provided. Moves in the valve closing direction and The valve armature is preferably configured such that each armature each other by moving in the valve opening direction against the urging force of the first biasing member is abutting.

According to this structure, the armature for the outlet valve and the opening / closing member for the outlet valve are normally brought into contact with each other by the first urging member and the fifth urging member. In a state in which a current flows through the valve opening / closing coil and the armature for the inlet valve and the armature for the outlet valve are in contact with each other and the urging force of the first urging member is invalidated, the fifth urging member is connected to the outlet valve opening / closing member. If a large opposing force is applied, only the outlet valve opening / closing member can be moved even if the armature for the outlet valve is not moving. For this reason,
A more complicated operation is possible. For example, the outlet valve opening / closing member can be configured to be moved by the discharge member, and the outlet valve can be closed before the inlet valve is opened. Thus, it is possible to reliably eliminate the state in which the liquid flows due to the opening of both valves, and it is possible to perform highly accurate discharge.

At this time, the armature for the discharge member is
When the discharge member is moved in the discharge direction for reducing the volume of the measuring chamber, when the discharge member is moved from a position before the stroke end to a position at the stroke end, the discharge member is moved together with the outlet valve opening and closing member so that the outlet valve opening and closing member discharges. When reaching the position where the outlet valve is closed by contacting the outlet, it is preferable that the discharge member also stops and reaches the stroke end position. With this configuration, since the ejection is completed at the same time as the ejection port is closed, two-stage ejection of the liquid can be prevented, and the liquid can be ejected in one stage.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a plunger pump 1 according to a first embodiment of the present invention. As shown in FIGS. 2 and 3, the pump 1 includes a drive unit 2 having a built-in drive mechanism and a pump unit 3. The drive unit 2 of the pump 1 is provided with a connector 4 for controlling the drive unit 2 and supplying power, and a controller (not shown) is connected to the connector 4 to control the pump 1.

As shown in FIG. 2, the driving section 2 includes two bodies 5, 6 formed in a substantially rectangular cylindrical shape, and a connecting block 7. Each body 5, 6 and connecting block 7
Has a hollow cylindrical portion formed therein. In this hollow portion, two yokes 10A and 10B are arranged at a predetermined distance via a spacer 12. In each of these yokes 10A and 10B, a valve opening / closing coil 13 is provided.
And resin bobbins 11A and 11B around which the discharge / suction coil 14 is wound, respectively. The ends of the coils 13 and 14 are connected to the connector 4 so that the controller controls switching of power supply to the coils 13 and 14.

At the center of each of the bobbins 11A and 11B, a through hole is formed. As shown in FIGS. 2 and 4, four through-hole armatures 21 and 21 are formed in the through hole.
31, 41, and 51 are guided by resin bobbins 11A and 11B and arranged so as to be vertically movable. Each of the armatures is an armature 21 for an outlet valve, an armature 31 for an inlet valve, an armature 41 for a discharge member, and a discharge amount setting armature 51 used as a discharge amount setting member from the side close to the pump section 3.

A micrometer 100 is fixed to the upper end of the body 6 via a double nut. The spindle 101 of the micrometer 100 is protruded and retracted by turning the knob of the micrometer 100, and the tip thereof is configured to be able to contact the upper end surface of the armature 51 for setting the discharge amount. By operating the micrometer 100 to adjust the protrusion amount of the spindle 101, the position of the upper stroke end of the discharge amount setting armature 51 can be adjusted.

These four armatures 21, 31,
The three drive rods 41, 51, ie, the outlet valve drive rod 22, the inlet valve drive rod 32, and the discharge member drive rod 42, are appropriately inserted. As shown in FIGS. 4 and 6 to 11, the outlet valve driving rod 2
2 is a through hole 2 formed in each armature 21, 31.
The armatures are inserted into the armatures 1A and 31A so as to be relatively movable with respect to the armatures 21 and 31. A spring receiver 15 supported by the spacer 12 is disposed in the through hole 31A of the inlet valve armature 31, and the spring receiver 15 and the outlet valve armature 21 are disposed.
A first coil spring 23 as a first urging member is interposed between them. Therefore, the rod 22 is disposed so as to pass through the center of the coil spring 23.

The outlet valve driving rod 22 is not fixed to the armature 21, but is fixed to a stop ring 22A which is a locking portion fitted to the rod 22 by the coil spring 23.
When the armature 21 is brought into contact with the armature 21, the armature 21 is basically moved with the movement of the armature 21. That is, the first coil spring 23 urges the outlet valve armature 21 downward, that is, toward the pump unit 3, and also urges the outlet valve driving rod 22 downward (to close the valve) via the stop ring 22A. ing.

The inlet valve driving rod 32 is disposed through the through holes 21B and 31B of the armatures 21 and 31, and is fixed to the inlet valve armature 31 by caulking. On the other hand, it penetrates the armature 21 for an outlet valve so as to be relatively movable. A stop ring 32 </ b> A to which the outlet valve armature 21 can be abutted is also fitted to the inlet valve driving rod 32, and when the outlet valve armature 21 is urged downward by the first coil spring 23. The inlet valve driving rod 32 and the inlet valve armature 31 are also urged downward (in the valve closing direction).

The discharge member driving rod 42 is disposed so as to pass through through holes 21C, 31C, 41C, and 51C formed in the four armatures 21, 31, 41, and 51, respectively. The ejection member driving rod 42 is caulked and fixed to the ejection member armature 41, but is inserted into the other armatures 21, 31, 51 so as to be relatively movable.

A third coil spring 43 as a third urging member is interposed between the discharge member armature 41 and the discharge amount setting armature 51. Here, the armature 51 for setting the discharge amount is usually a micrometer 10
0, the armature 41 for the discharge member and the rod 42 for driving the discharge member.
Is urged downward (in the liquid discharge direction) by the third coil spring 43.

Each of these rods 22, 32, 42
Is guided movably only in the vertical direction by the guide plate 16 and the spacer 12 disposed below the outlet valve armature 21.

On the other hand, as shown in FIG.
A container 60, a connection member 70 fitted to the upper portion of the container 60 and attached to the connection block 7, and a square plate-shaped connection connected via four connection rods 81 projecting from four corners of the connection block 7. The support plate 80 and the support plate 80
And a lid 90 screwed into the cover.

The container 60 is formed in a substantially cylindrical shape, and is formed of stainless steel, fluororesin, titanium, plastic, glass, or the like, whose lower end is formed in a substantially conical shape whose diameter decreases downward. In the present embodiment, the container 60 is formed of a transparent material such as plastic so that the inside of the container 60 can be visually recognized.

The connecting member 70 is formed in a substantially cylindrical shape.
A claw 72 urged outward by a spring 71 is provided at two opposing locations on the outer peripheral surface. And this claw part 7
When the connection member 70 is inserted into the connection block 7 in a state where the hook 2 is pushed in and the pushing of the claw portion 72 is released, FIG.
As shown in FIG. 7, the claw portion 72 is configured to engage with the concave groove of the connection block 7. Therefore, the connection member 70 is detachably attached to the connection block 7.

A through hole 70A penetrating vertically is formed in the center axis portion of the connection member 70, and guide plates 73 and 7 are formed at the upper end and the lower end of the through hole 70A, respectively.
4 are removably arranged. These guide plates 73 and 74 are positioned and locked by a pin 75.

The guide plates 73 and 74 include:
Three rods, an outlet valve rod 25, an inlet valve rod 35, and a discharge member rod 45, are guided so as to be movable only in the vertical direction. These rods 25, 35, 45 are urged upward by three coil springs 26, 36, 46 disposed between the guide plates 73, 74. That is, a regulating ring 76 is fitted to each of the rods 25, 35, and 45, and a spring seat 77 locked by the upper ring 76 and a spring seat 78 abutted on the guide plate 74. The coil springs 26, 36, 46 are interposed between the coil springs. 6 to 11, the spring seat 78 and the guide plate 73 are omitted for simplification of the drawing.

A conical recess 70B is formed on the outer peripheral surface of the connection member 70, and the connection member 7
An air hole 79 is formed up to the inner peripheral surface of zero. The air holes 79 allow the pressure inside the container 60 to be equal to the outside air pressure even when the connecting member 70 is attached to the container 60.

A disk-shaped engagement plate 61 is attached to the outer periphery of the lower end 60A of the container 60, and a valve block 65 is inserted into the inner periphery. This engagement plate 6
By screwing the substantially disk-shaped lid 90 in a state where the first plate 1 is locked to the support plate 80, the engagement plate 61, that is, the lower end 60 A of the container 60 is brought into contact with the support plate 80 and the lid 9.
0 and is fixed.

The valve block 65 is locked in a substantially cylindrical shape, and has a conical sealing surface 6 on the surface exposed in the container 60.
6 are formed. A discharge port 67 penetrates from the bottom of the seal surface 66 toward the lower part of the valve block 65, and a discharge needle 68 is disposed in the discharge port 67 and fixed by a mounting screw 69.

The outlet valve rod 25 provided so as to contact the lower part of the outlet valve driving rod 22 is bent in the middle as shown in FIG. The discharge port 67 is formed so as to be able to close the discharge port 67 by contacting the discharge port 67. Therefore, the outlet valve rod 2
5 and the valve block 65,
An outlet valve for opening and closing the discharge port 67 is configured.

The discharge member rod 45 provided so as to contact the lower part of the discharge member driving rod 42 is also bent in the middle. The lower end portion 45A of the outlet valve rod 25 is attached to the lower end portion 45A of the discharge member rod 45.
A is slidably inserted, and is disposed concentrically with the lower end 45A.

Further, the inlet valve rod 35 provided so as to contact the lower part of the inlet valve driving rod 32 is also bent halfway. A lower end portion 45A of the discharge member rod 45 is provided at a lower end portion 35A of the inlet valve rod 35.
Are slidably inserted and arranged concentrically with the lower end 35A. Also, the lower end 3 of the inlet valve rod 35
5A is configured to abut the sealing surface 66 of the valve block 65 so as to partition the inside of the inlet valve rod 35 from the outside. Therefore, the lower end 35 of the inlet valve rod 35
The A and the valve block 65 constitute an inlet valve for opening and closing the inlet.

The rods 25, 35, 45 are urged upward by the coil springs 26, 36, 46 and are in contact with the rods 22, 32, 42.
It moves forward and backward (moves up and down) in conjunction with the forward and backward movements of 2, 32 and 42.
For this reason, the outlet valve driving rod 22 and the outlet valve rod 25 constitute an outlet valve opening / closing member, and the inlet valve driving rod 32 and the inlet valve rod 35 constitute an inlet valve opening / closing member. The ejection member driving rod 4
A discharge member is constituted by 2 and the discharge member rod 45. Also, the discharge port 6 defined by the inlet valve rod 35
The space on the seventh side is a weighing chamber.

Then, the inlet valve opening / closing member (rods 32, 3)
5) The second coil spring 36 that moves in the valve opening direction (upward)
Constitutes a second urging member, and the ejection member (rod 4
A fourth biasing member is configured by a fourth coil spring 46 that biases the outlet valve opening / closing members (rods 22 and 25) in the valve opening direction (upward). The fifth coil spring 26 constitutes a fifth biasing member. These coil springs 26, 36, 46 are set so that the spring force (biasing force) is weaker than the first coil spring 23 and the third coil spring 43.

Next, the operation of this embodiment will be described with reference to FIGS.
This will be described with reference to FIG. Note that FIGS. 6 to 11 show each of the armatures 21, 31, 41, and 41 for easy understanding.
51 is shown expanded. First, the liquid 8 is supplied into the container 60. This supply of liquid 8 is usually
The container 60 may be removed, the liquid 8 may be put therein, and the liquid 8 may be reattached. However, a liquid injection port may be formed in the container 60 or the connection member 70, or the air hole 79 may be used as an injection port. It may be supplied via a tube or the like.

In this embodiment, the state shown in FIG. 6 is set as the origin. The origin state is a state in which no current flows through each of the coils 13 and 14 and the coil 13 and 14 are turned off. At this time, the armature 41 for the discharge member, the rod 42 for driving the discharge member,
The discharge member rod 45 is urged downward by the third coil spring 43 and urged upward by the fourth coil spring 46, but is urged downward because the spring force of the third coil spring 43 is greater. Therefore, the discharge member armature 41 comes into contact with the upper surface of the outlet valve drive rod 22 and stops at a position where the outlet valve rod 25 comes into contact with the discharge port 67. The discharge member driving rod 42 is fixed to the discharge member armature 41, and the discharge member rod 45 abuts on the rod 42 by the fourth coil spring 46 and moves integrally, so that the outlet valve rod 25 is connected to the discharge port 67. Is a position of the lower stroke end of the discharge member rod 45. The discharge amount setting armature 51 is urged upward by the third coil spring 43 and is arranged at a position where it comes into contact with the spindle 101.
As will be described later, the position of the upper stroke end of the discharge member rod 45 is set according to the position of the discharge amount setting armature 51, and the discharge amount is adjusted. Further, since the armatures 41 and 51 are urged in directions opposite to each other by the third coil spring 43, a predetermined gap is formed therebetween.

On the other hand, the outlet valve driving rod 22, the outlet valve armature 21, and the outlet valve rod 25 are urged downward by the first coil spring 23 having a larger spring force than the fifth coil spring 26 which urges them upward. Have been. Thus, the outlet valve rod 25 comes into contact with the discharge port 67 and the outlet valve is closed.

Further, the inlet valve armature 31, the inlet valve driving rod 32, and the inlet valve rod 35
Is turned off, only the spring force of the second coil spring 36 acts, so that the second coil spring 36 is urged upward. For this reason, the lower end 35A of the inlet valve rod 35 is separated from the sealing surface 66, and the inlet valve is opened. Further, the armature 21 for the outlet valve is urged downward, and the armature 31 for the inlet valve is urged upward.
There is a predetermined gap between the first and the third.

In this home position, when the controller is turned on, the controller first supplies a current to the discharge / suction coil 14 to turn it on in step 1. Then, as shown in FIG. 7, each of the armatures 41 and 51 arranged in the magnetic path of the discharge and attraction coil 14 is formed.
Are attracted to each other by a force greater than the spring force of the third coil spring 43 by being magnetized. Further, since the armatures 41 and 51 are in contact with each other, the action of the third coil spring 43 is extinguished.
With the spring force of 6, the discharge member rod 45 is moved to the armature 51.
Moves upward to a position where it comes into contact with the spindle 101 (position of the upper stroke end). Thereby, the lower part of the discharge member rod 45 is separated from the sealing surface 66.

Subsequently, in Step 2, the controller also supplies a current to the valve opening / closing coil 13 to turn it on. Then, as shown in FIG. 8, each of the armatures 21 and 31 arranged in the magnetic path of the valve opening / closing coil 13 becomes the first armature.
They are attracted to each other by a force larger than the spring force of the coil spring 23 and come into contact with each other. Therefore, the inlet valve armature 31, the inlet valve driving rod 32, and the inlet valve rod 35 are lowered, and the lower end 35A abuts on the sealing surface 66 to close the inlet valve. At the same time, the outlet valve armature 21, the outlet valve driving rod 22, and the outlet valve rod 25 are raised, and the outlet valve is opened.

As a result, the liquid 8 is partitioned into the measuring chamber inside the inlet valve rod 35 and its volume is measured. This volume depends on the position of the discharge member rod 45, that is, the discharge member rod 4
5 is set at the position of the upper stroke end, and by setting this position by operating the micrometer 100 as described above, the discharge amount measured by volume is set.

Next, in step 3, the controller cuts off the current of the discharge / suction coil 14 to turn it off. Then, since the magnetic force for bringing the armatures 41 and 51 into contact with each other is not actuated by the discharge suction coil 14, the discharge member armature 41 becomes the third coil spring 43.
And move downward. At this time, as shown in FIG. 9, until the armature 41 for the discharge member comes into contact with the rod 22 for driving the outlet valve, the armature 41 for the discharge member,
Only the ejection member driving rod 42 and the ejection member rod 45 move downward, and the liquid 8 is ejected from the ejection port 67 according to the amount of movement.

Further, the spring force of the third coil spring 43 is
Since the discharge member armature 41 abuts against the outlet valve driving rod 22 because the spring force is greater than the combined spring force of the coil springs 26 and 46, as shown in FIG. And lower it. When the outlet valve rod 25 comes into contact with the discharge port 67 and closes the discharge port, the discharge member rod 45 cannot move downward any more, and stops to complete the liquid discharge.

Next, in Step 4, the controller also cuts off the current of the valve opening / closing coil 13 and turns it off. Then, as shown in FIG.
3, the magnetic force for bringing the armatures 21 and 31 into contact with each other does not work, so that the inlet valve armature 31, the inlet valve driving rod 32, and the inlet valve rod 35
6 to move upward, the inlet valve opens and returns to the initial state.

The controller discharges the liquid 8 for each set amount by repeating the above four steps. It is necessary to set the discharge amount for each time with the micrometer 100, but in actual use, it is often sufficient if the discharge amount per unit time can be varied. In this case, since the operation cycle is driven by the coils 13 and 14, the operation cycle can be accelerated. Therefore, the number of repetitions per unit time can be easily changed, and the discharge amount per unit time can be changed. For example, when the discharge amount in one operation cycle is set to 5 μL, if the operation is performed once per second, the discharge amount is 5 per second which is a unit time.
The discharge amount can be set to a microliter, and if the operation is performed ten times per second, the discharge amount can be set to 50 μl per unit time.

According to the above-described embodiment, the following effects can be obtained. (1) Valve opening / closing coil 13 and discharge / suction coil 14
And at least the first coil spring 23 and the second coil spring 36, the two coils 13, 1
4, the outlet valve opening / closing members (rods 22 and 25), the inlet valve opening / closing members (rods 32 and 35), and the discharge member (rods 42 and 25).
45) can be driven. For this reason, compared with the conventional example using three coils (solenoids), downsizing of the drive unit 2 is facilitated and drive control is also simplified. For this reason, the pump 1 can be reduced in size and weight, and can be easily incorporated into production lines for various products.

(2) Since each member is driven by using the coils (solenoids) 13 and 14, high-speed driving can be performed as compared with air driving, and tact time can be shortened.
In addition, when the solenoid is driven, the drive unit 2 can be downsized compared to the case of the motor and cam drive.
Can be applied to an application in which the liquid 8 is ejected while being attached to the tip of the arm robot and moved, and can be used in various parts, and the usability can be improved.

(3) Furthermore, high-speed driving, for example, one per second
Since the discharge operation can be performed zero or more times, the discharge amount per unit time can be easily adjusted by controlling the number of operations. For this reason, when the liquid 8 such as an adhesive is discharged, since the discharge target is different, the discharge amount can be easily changed only by changing the number of driving operations per unit time when adjusting the discharge amount. . Therefore, compared to changing the discharge amount by operating the micrometer 100, only the setting of the controller needs to be changed, so that the discharge amount can be set very easily and accurately. In addition, the adjustment of the micrometer 100 usually needs to be performed while the pump 1 is stopped. However, the number of times of driving per unit time can be changed even during the operation of the pump 1. Even if it is necessary to change the discharge amount depending on the target product because a variety of products are mixed and flowed on the line, it is only necessary to change the number of times of driving according to the target product. That is, since the pump 1 can also digitally control the discharge amount, it can be easily and automatically controlled even in a factory where factory automation (FA) is performed.

(4) Since the armatures 21 and 31 are arranged in series in the magnetic circuit of the valve opening / closing coil 13, when the current flows through the valve opening / closing coil 13, the respective armatures 21 and 31 are magnetized. Can be moved toward each other. Therefore, since each opening / closing member can be driven with a simple configuration, the number of parts is reduced, the production efficiency is improved, and the manufacturing cost can be reduced. Similarly, each armature 41,
Since the discharge members 51 are also arranged in series in the magnetic circuit of the discharge suction coil 14, the discharge member can be driven with a simple configuration, so that the number of parts is reduced, the production efficiency is improved, and the production cost can be reduced.

(5) When a current is applied to the discharge / suction coil 14, the armatures 41 and 51 can be brought into close contact with each other to eliminate the function of the urging force of the third coil spring 43. To move in the liquid suction direction. Therefore, only by setting the position of the upper stroke end of the discharge amount setting armature 51 with the micrometer 100 capable of contacting the armature 51, the movement stroke of the discharge member, that is, the amount of the liquid partitioned into the measuring chamber (discharge amount) ) Can be adjusted. Therefore, the discharge amount can be adjusted with high accuracy with a simple configuration.

(6) In the initial state where each of the coils 13 and 14 is turned off, the inlet valve is opened, the outlet valve is closed, and the discharge member is moved in the liquid discharge direction so that each biasing member is moved. (Coil springs 23, 43, 36)
In the initial state, the outlet valve that is easily sealed can be closed, so that it is possible to easily and reliably prevent the liquid from leaking from the discharge port 67 when the pump 1 is not used.
That is, the other inlet valve rod 35 and discharge member rod 45
Can not be sealed without also sealing the sliding surface with other rods. On the other hand, the outlet valve rod 25 can be sealed only by closely contacting the discharge port 67, so that the sealing structure is simplified and reliable. To prevent liquid leakage.
Further, the discharge operation is also ended at the timing when the outlet valve is closed, so that the liquid discharged last can be desirably drained. Also, when the switch is turned on and put into operation,
Since the start can be always started from the timing when the discharge member rod 45 moves in the liquid suction direction, the suction time of the liquid can be always constant, and the suction amount can be constant, so that the accuracy of the discharge amount can be improved.

(7) Since the outlet valve drive rod 22 is not fixed to the outlet valve armature 21 by caulking or the like, when the armatures 21 and 31 are brought into contact with the valve opening / closing coil 13, the outlet valve By pushing the drive rod 22 with the discharge member armature 41, only the outlet valve drive rod 22 can be moved. For this reason, the outlet valve can be closed before the inlet valve opens, and the state in which both valves are opened and the liquid 8 flows can be reliably eliminated, and highly accurate discharge can be performed.

(8) Further, when the discharge member is moved in the discharge direction, at the end of the stroke end, the outlet valve driving rod 22 is simultaneously moved so that the outlet valve rod 25 contacts the discharge port 67. When the outlet valve is closed by contact, the discharge member also reaches the stroke end position, so discharge is completed at the same time as the discharge port is closed,
The liquid can be prevented from being discharged in two stages, and the liquid can be discharged in one stage.
For this reason, even when a large amount of liquid is discharged or when a quick-drying liquid is discharged, the discharged liquid is doubled, and the second-stage discharge part is likely to be peeled off from the first-stage discharge part, or the appearance is impaired. Can be prevented.

(9) Since the liquid 8 to be discharged is confined in the inlet valve rod 35 by closing the inlet valve to measure the volume, the discharge amount is controlled with high accuracy even if the discharge amount is very small. be able to. In addition, adjustment of the discharge amount each time can be performed simply and with high accuracy because the position of the discharge amount setting armature 51 need only be adjusted by the micrometer 100.

(10) Since the container 60 is provided in the pump section 3 and the liquid 8 is put in the container 60, the transfer distance of the liquid 8 can be shortened, and the pressurizing means is provided even if the liquid 8 has high viscosity. And can be supplied reliably. In particular, when the discharge amount is small with respect to the volume of the container 60, such as when discharging a very small amount of the liquid 8, if the container 60 is filled with the liquid 8, the discharge amount for half a day or one day can be secured. For,
Even when the container 60 is attached and detached to replenish the liquid 8,
Workability and productivity do not decrease. The replenishment time of the liquid 8 can be easily managed by providing a liquid level gauge or setting a replenishment cycle based on the discharge amount per fixed time. In addition, when the container 60 is attached and detached and the liquid 8 is replenished, a transfer means such as a pressure feed pump is not required, so that the structure is simplified and the pump 1 can be provided at low cost.

(11) In this embodiment, the connection member 7
Since the pump section 3 can be easily attached and detached simply by pushing the 0 claw section 72, replacement work of the liquid 8 and the like can be easily performed, and a plurality of pump sections 3 can be easily formed according to the type of the liquid 8. Replacement can be easily performed.
Furthermore, since the rods 25, 35, and 45 that are in contact with the liquid can also be separated and removed from the drive unit 2 when the pump unit 3 is removed, the pump unit 3 can be replaced even when the type of the liquid 8 is exchanged. Cleaning and the like can be easily performed, and maintenance can be easily performed.

(12) The high-viscosity liquid 8 such as a paste
If the pump unit 3 and the discharge port 67 are separated from each other, the discharge of the liquid 8 is delayed. However, according to the present embodiment, the pump unit 3 having the discharge member rod 45 for discharging the liquid 8 and the discharge port 67 Is very close, so there is no delay in discharging the liquid 8.

(13) Solvents such as alcohol, which have a low boiling point and are easy to vaporize, are liable to form bubbles when the flow becomes complicated, such as when sucking into the pump 1 or when passing through a check valve, and the bubbles accumulate. Although the liquid 8 may not be discharged, the pump 3 and the discharge port 67 are very close according to the present embodiment, and the inlet valve is provided concentrically outside the discharge member rod 45, so that the liquid 8 is sucked. Since the area can be increased, the liquid 8 can flow in smoothly and the flow does not become complicated, so that the liquid 8 can be discharged normally without generating bubbles. Also, even if bubbles are generated,
Since the foam has a lower specific gravity than the liquid 8, it moves upward in the container 60. Particularly, in the present embodiment, since no seal is disposed on the sliding contact surface between the outlet valve rod 25 and the discharge member rod 45 or the sliding contact surface between the discharge member rod 45 and the inlet valve rod 35, a slight gap between the rods is provided. (For example, 1 / 100mm ~
The bubble escapes from about 5 / 100mm) and moves upward,
Bubbles do not remain in the discharge port 67 and the inner portion of the inlet valve rod 35 provided at the lowermost end of the container 60, so that the liquid 8 containing no bubbles can always be discharged.

(14) Since the pump unit 3 and the drive unit 2 are separated, titanium having a high unit price can be used only for the pump unit 3, and even the chemical-resistant pump 1 is provided at a low price. can do.

(15) In order to discharge the high-viscosity liquid 8 at high speed, it is necessary to extrude the liquid 8 at a high pressure.
Since the lower end portions 25A, 35A, 45A of 5, 35, 45 are arranged concentrically, the pressure resistance is increased and the liquid 8 can be discharged at a high speed. Since the drive unit 2 is a so-called solenoid type, the size of the pump 1 can be reduced, and it is particularly suitable for discharging a small amount of liquid 8. In addition, since the drive mechanism only needs to control whether or not power is supplied to each of the coils 13 and 14 by the controller, the control is easy and the operation can be reliably performed.

Next, a tube pump 200 according to a second embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the same or similar components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted or simplified. The tube pump 200 includes a driving unit 202 and a pump unit 203. The drive unit 202 has substantially the same configuration as the drive unit 2 of the pump 1, and includes the respective bodies 5, 6, and the coils 13, 14, 4, 4, and 4, which are ON / OFF controlled by a controller (not shown) connected to the connector 4. Armature 21-5
1, rods 22, 32, 42 and these rods 2
A spacer 12 and a guide plate 16 capable of guiding the guides 2, 32 and 42 are provided.

A micrometer 1 for setting the position of the upper stroke end of the discharge amount setting armature 51.
In place of 00, an adjustment bolt 102 capable of adjusting the amount of protrusion by a nut 103 is provided.

Further, in the first embodiment, the coil springs 26, 36, 46 are arranged on the rods 25, 35, 45.
In this case, the rods 22, 32, and 42 do not come into contact with the liquid 8, and there is no need to provide separate rods 25, 35, and 45 that are separated from the drive unit 2 in order to clean them. Reference numerals 36 and 46 are interposed between the guide plate 16 and the stop rings 22A and 32A and the rod 42.

As shown in FIGS. 13 and 14, the pump section 203 includes a tube 210 constituting a flow path of the liquid 8, a tube holding ring 220 holding the tube 210 and formed in a ring shape, and A receiving member 230 for receiving the tube 210; an outlet keyboard 27 attached to the lower end of each of the rods 22, 32, 42;
7, and a discharge keyboard 47.

The receiving member 230 and the tube holding ring 220 are detachably attached to the body 5 by the thumb screw 240. In this embodiment, two tubes 210 are arranged. The number of the tubes 210 may be one or three or more, and may be appropriately set according to the size of the tube pump 200, the diameter of the tube 210 (set according to the amount of protrusion), and the like.

The tube holding ring 220 has through holes 221 through which the tubes 210 are inserted. As shown in FIG. 12, the through hole 221 is formed such that the diameter of the outer peripheral side is larger than that of the inner peripheral side of the ring.
The diameter is changed in the middle of the through hole 221. The diameter change portion is formed obliquely in a tapered shape. After arranging both ends of each tube 210 in the through hole 221 of the tube holding ring 220, the sleeve 211 is fitted from the end of each tube 210,
An end of each tube 210 is fixed to a tube holding ring 220. A supply tube (not shown) connected to a tank or the like storing the liquid 8 and a discharge tube (not shown) for discharging the liquid 8 are connected to each sleeve 211. .

The center of the receiving member 230 is
02 is formed, and a step 231 projecting toward the side
1 is provided with a receiving surface 232 on which the tubes 210 are arranged and placed. In addition, on the top of the step portion 231 protruding from the receiving surface 232 toward the drive unit 202 side,
A contact surface 233 with which each of the keys 27, 37, and 47 contacts.
Are formed. Then, from the receiving surface 232 to the contact surface 2
As shown in FIG. 12, the height dimension up to 33 is set to a dimension slightly smaller than approximately twice the wall thickness of the tube 210 (for example, about 1.6 to 1.9 times the wall thickness). Therefore, when the keyboards 27 and 37 are brought into contact with the contact surface 233 in a state where the tube 210 is arranged on the receiving surface 232,
The tube 210 is appropriately crushed by the keyboards 27 and 37 so that the flow path in the tube 210 is closed. Further, similarly to the above-described embodiment, the ejection member driving rod 42, that is, the ejection keyboard 47 cannot move below the position where the exit keyboard 27 is in contact with the contact surface 233, and the position in this state is not possible. Is the position of the lower stroke end. In the present embodiment, the position of the lower stroke end of the ejection keyboard 47 is set such that the keyboard 47 stops at a position slightly above the contact surface 233 without contacting the contact surface 233. In other words, the keyboard 210
Is not completely crushed.

The keyboards 27 and 37 are arranged on both sides of the keyboard 47, and move up and down as the rods 22 and 32 move up and down. The lower portion of each of the keyboards 27 and 37 is formed in a substantially wedge shape, and is configured so that the tube 210 can be effectively crushed at a relatively narrow portion at the lowermost end. The lower end of the keyboard 47 is formed wider than the other keys 27 and 37, and is configured to be able to contact the tube 210 with a relatively large area.

In the tube pump 200, an outlet valve opening / closing member is constituted by the outlet valve driving rod 22 and the outlet keyboard 27, and an inlet valve opening / closing member is constituted by the inlet valve driving rod 32 and the inlet keyboard 37. Have been. The ejection member is constituted by the ejection member driving rod 42 and the ejection keyboard 47. The space in the tube 210 defined by the inlet valve and the outlet valve is a measuring chamber. The first to fifth urging members are the same as those of the pump 1.

Next, the operation of this embodiment will be described with reference to FIG.
This will be described with reference to FIGS. In addition, tube pump 2
The driving unit 202 of the pump 00 has basically the same configuration as the driving unit 2 of the pump 1 and operates in the same manner.

First, the tube holding ring 220 to which the tube 210 is attached and the receiving member 230 are screwed to the body 5, and a liquid supply tube and a discharge tube (not shown) are connected to each sleeve 211. Then, in the home position where the coils 13 and 14 shown in FIG. 15 are turned off, the outlet keyboard 27 is located at the lower stroke end where it comes into contact with the contact surface 233 as in the first embodiment. Therefore, the outlet valve of the tube 210 is closed. Further, the ejection keyboard 47 has a contact surface 233.
, But is slightly above it, crushing the tube 210 to some extent. On the other hand, the inlet keyboard 37 is at the position of the upper stroke end, and the inlet valve is open.

In this home position, when the controller is turned on, the controller first supplies a current to the discharge / suction coil 14 to turn it on in step 1. Then, as shown in FIG. 16, the armatures 41 and 51 come into contact with each other, and the discharge member driving rod 42 is moved by the spring force of the coil spring 46 at the position where the armature 51 comes into contact with the adjustment bolt 102 (the position of the upper stroke end). ) Upward (liquid suction direction). As a result, the ejection keyboard 47 is separated from the tube 210.

Subsequently, in Step 2, the controller also supplies a current to the valve opening / closing coil 13 to turn it on. Then, as shown in FIG.
The members 1 and 31 attract each other and come into contact with each other. For this reason, the inlet valve armature 31, the inlet valve driving rod 32, and the inlet valve keyboard 37 descend to crush the tube 210, and the inlet valve is closed. At the same time, armature 2 for outlet valve
1. The outlet valve driving rod 22 and the outlet keyboard 27 are raised, and the outlet valve is opened.

When the inlet valve is closed, the volume is measured because it is partitioned from the liquid supply side. Since this volume is set at the rising position of the discharge keyboard 47, that is, the position of the upper stroke end, by setting this position by operating the adjustment bolt 102 as described above, the discharge amount to be measured by volume is set. You. At this time, in order to adjust the volume in the tube 210 by the ejection keyboard 47, the ejection keyboard 47 is required.
17 has to be changed, the upper stroke end of the ejection keyboard 47 should be changed as shown in FIG.
It is sufficient to secure the tube 210 to a position where it comes into contact with the tube 210 without being crushed, and it is not necessary to move the tube 210 to a position higher than that, that is, a position where the ejection keyboard 47 is separated from the tube 210. Therefore, in the present embodiment, the upper stroke end of the ejection keyboard 47 is set to a position where it comes into contact with the tube 210 without being crushed, and the lower stroke end is
As described above, this is the position when the exit keyboard 27 contacts the contact surface 233.

Next, in Step 3, the controller cuts off the current of the discharge / suction coil 14 to turn it off. At first, as shown in FIG. 18, the armature 41 for the ejection member is urged by the third coil spring 43 to move downward, and only the ejection member driving rod 42 and the ejection keyboard 47 move downward (in the liquid ejection direction). ), And the liquid 8 is discharged to the discharge side according to the amount of movement.

Further, after the armature 41 for the discharge member comes into contact with the outlet valve driving rod 22, the outlet valve driving rod 22 and the outlet valve rod 25 are also lowered as shown in FIG. For this reason, the outlet keyboard 27 descends together with the ejection keyboard 47, and the outlet keyboard 27 is brought into contact with the contact surface 23.
When the ejection port is closed by contacting the ejection key 3, the ejection keyboard 47 also reaches the lower stroke end and stops.

Next, in Step 4, the controller also cuts off the current of the valve opening / closing coil 13 and turns it off. Then, as shown in FIG. 20, the armature 31 for the inlet valve, the rod 32 for driving the inlet valve, and the inlet valve rod 35
Is moved upward by the coil spring 36, and the inlet valve is opened to return to the initial state.

The controller discharges the liquid 8 for each set amount by repeating the above four steps. Note that the discharge amount for each discharge may be set by the adjustment bolt 102. However, in the present embodiment, the discharge amount is varied by the number of times of drive (the number of discharges) per unit time during actual use. ing.

When changing the type of the liquid 8 to be discharged or performing maintenance work, the thumbscrew 240 is loosened to remove the receiving member 230 and the tube holding ring 220, and the tube 210 is replaced or cleaned. I just need.

According to such an embodiment, the first
The same functions and effects as the embodiments (1) to (9) and (14) can be obtained, and the following effects can be obtained. (2-1) Since the flow path of the liquid 8 is formed by the tube 210, the driving unit such as the outlet keyboard 27 does not directly contact the liquid 8, and the type of liquid to be transferred is less restricted. It can be used for various applications. For this reason,
In particular, if a fluorine resin tube having high chemical resistance is used as the tube 210, even a small amount of an adhesive or various chemicals can be measured and transferred, and the pump 200 can be widely used for various applications. it can.

(2-2) Since a driving mechanism using solenoids (coils 13, 14) is employed as the driving unit 202, when the moving stroke of each of the rods 22, 32, 42 is small, a very large force is applied. Can be added. For this reason, if the stroke is such that the tube 210 is opened and closed as in the case of the pump 200, each key 2 is pressed with a sufficiently large force.
7, 37, 47 can be given, and even if a relatively large force is required to crush like a fluororesin tube, it can be crushed reliably. Therefore, it is possible to use the tube 210 made of fluororesin, which is difficult to use in the case of air drive or motor drive, and it is possible to provide the tube pump 200 having high chemical resistance. In particular, in the case of a tube 210 made of rubber or the like having elasticity, a certain stroke is required because the elasticity can absorb the moving stroke of the outlet keyboard 27 or the inlet keyboard 37, but a certain amount of stroke is required. Then, since there is almost no such absorption, the tube 210 can be opened and closed even by slightly moving the outlet keyboard 27 and the inlet keyboard 37, so that the moving stroke of the rods 22, 32 can be made smaller. . For this reason, a greater force can be applied to the keyboards 27 and 37, and even the fluororesin tube can be reliably opened and closed.

(2-3) Since the liquid to be discharged is closed by the inlet valve and the outlet valve and confined in the measuring chamber in the tube 210 to measure the volume, even if the discharge amount is very small, the discharge amount can be reduced. It can be controlled with high precision.

(2-4) Since the pump section 203 can be removed from the drive section 202 simply by removing the thumbscrew 240, the pump section 2 can be used even when the type of the liquid 8 is changed.
03, and further wash the tube 210,
Maintenance work for replacement can be easily performed.

(2-5) Each keyboard 27, 3
Since the abutment surface 233 with which the abutments 7, 47 are abutted is provided, the respective tubes 210 are not excessively crushed by the keyboards 27, 37, 47, and the degree of deterioration of the respective tubes 210 can be reduced to extend the life. Can be.

Note that the present invention is not limited to the configuration of the above-described embodiment, and modifications within a range that can achieve the object of the present invention are included in the present invention. For example, the second
A tube holding ring 320 as shown in FIGS. 21 and 22 may be used as the tube holding ring 220 in the embodiment. The tube holding ring 320 has a female screw formed in a through hole 321 in which the tube 210 is arranged, and a groove 322 through which the tube 210 can be inserted by cutting between the through hole 321 and the upper surface of the tube holding ring 320. Are formed. A substantially cylindrical screw member 330 can be screwed into the through hole 321, and the through hole 33 formed at the center of the screw member 330 is formed.
1, each end of the tube 210 is inserted.

The diameter of the through hole 331 is changed in the middle of the through hole 331 so that the diameter on the outer circumferential side is larger than the inner circumferential side of the ring, similarly to the through hole 221. Are formed diagonally in a tapered shape.
Each of the tubes 210 has a screw member 3 at both ends.
After being placed in the through hole 331 of each of the 30
By fitting the sleeve 211 from the ten ends, the end of each tube 210 is fixed to the screw member 330.

When such a tube holding ring 320 is used, the screw member 3
By changing the screwing position of 30, the tension of each tube 210 can be adjusted. Since the tube 210 is made of an elastic resin or the like, the screw member 3
By changing the screwing position of 30 and changing the tension applied to the tubes 210, each tube 210 can be expanded and contracted. Since the diameter of each tube 210 changes finely with the expansion and contraction, the volume in each tube 210 when each keyboard 27, 37, 47 is driven can be finely adjusted, and the discharge amount can also be finely adjusted. Can be. This adjustment is
Since it can be set very finely, even if the discharge amount for each time cannot be adjusted by the adjustment bolt 102 and there is a slight error, the adjustment can be performed with high accuracy and easily by changing the tension of each tube 210. be able to.

Further, in the tube pump 200,
The number of tubes 210 is not limited to two, but may be one, or three or more, and these may be appropriately set in practice.

Further, in each of the above embodiments, the armature 51 for setting the discharge amount is brought into contact with the micrometer 100 and the adjustment bolt 102 by the third coil spring 43. However, as shown in FIG. It may be fixed to the bolt 102 or the like using a screw or the like. In this case, the discharge member drive rod 42 is set to a length that does not protrude above the discharge member armature 41 and is fixed to the armature 41 by caulking or the like, and the armature 41 contacts the outlet valve drive rod 22. The third coil spring 43 biasing downward may be incorporated between the rod 22 and the spacer 12 or the like. In each of the above embodiments, when a current is applied to the coil 14, the armature 4
The armature 51 moves toward the upper stroke end where the armature 51 abuts on the micrometer 100 or the like by the action of the fourth coil spring 46 for urging the rod 22 upward. If the current flows through the coil 14, the armature 41 directly moves to a position where it contacts the armature 51, that is, directly moves to the upper stroke end, so that the movement time can be reduced. For this reason, with the configuration as shown in FIG. 23, it is possible to realize even higher speed driving. In this case, in the case of FIG. 23, it is necessary to leave the coil spring 46 in order to abut the rods 42 and 45. However, when the rod is not divided as in the second embodiment, the coil spring 46 is eliminated. You can also.

Further, as described above, each pump 1,200
Since the discharge amount per unit time can be easily adjusted by changing the number of operations per unit time, the upper stroke of the discharge amount setting armature 51 without providing the micrometer 100 or the adjustment bolt 102 is provided. The end position may be fixed so that the discharge amount cannot be adjusted each time. Further, in this case, instead of the discharge amount setting armature 51, a portion to which the discharge member armature 41 can be abutted may be provided on the body 6, so that the position of the upper stroke end of the discharge member armature 41 can be determined. In addition, it is only necessary that the armature 41 be configured to move upward when a current flows through the coil 14.

In each pump 1, 200, the initial state is such that the coils 13 and 14 are turned off. However, for example, the respective states shown in FIGS. 7 to 10 and FIGS. These may be appropriately set by the controller according to the type of the liquid 8 to be discharged.

Further, in each of the above embodiments, when a current is applied to the valve opening / closing coil 13, the inlet valve opening / closing member is moved in the valve closing direction and the outlet valve opening / closing member is moved in the valve opening direction. However, for example, when the inlet valve opening / closing member is attached to the lower armature 21 and the outlet valve opening / closing member is attached to the upper armature 31, the inlet valve opening / closing member is opened when a current flows through the valve opening / closing coil 13. It may be configured to move in the valve direction and move the outlet valve opening / closing member in the valve closing direction. Similarly,
The discharge member may be configured to move in the liquid discharge direction when a current flows through the discharge suction coil 14. On this occasion,
Each of the urging members may be arranged so that, when no current is flowing, each of the urging members moves to a side opposite to a case where the current flows.

In the present invention, the urging member is not limited to a coil spring, but may be any other spring member or any member that can apply an urging force other than a spring. further,
In the above-described embodiment, the fourth urging member (the fourth coil spring 46) and the fifth urging member (the fifth coil spring 26) are used to stop the discharge member at the same time as closing the outlet valve so that the discharge ends. ), But these are not always necessary. In this case, the outlet valve and the inlet valve are driven by the valve opening / closing coil 13 and the discharge member is the discharge / suction coil 14.
And drive independently.

Further, in the above-described embodiment, when the outlet valve is closed, the discharge member (discharge member rod 45 and discharge keyboard 47) also comes into contact with the sealing surface 66 of the valve block 65 to be sealed or closed. The tube 210 may be crushed and sealed by contacting the contact surface 233. However, in order to set the outlet valve and the discharge member so as to abut on the sealing surface 66 and the abutting surface 233 at the same time, dimensional accuracy and the like must be extremely high, and the manufacture of the pumps 1 and 200 becomes complicated. However, if only the outlet valve is closed as in the above embodiment, the manufacture of the pumps 1 and 200 can be facilitated.
In addition, in the tube pump 200, the discharge keyboard 47 has a contact surface with the tube 200, and the other keyboards 27, 37.
When the tube 210 is completely crushed by the keyboard 47 like the other keys 27 and 37, a larger force is required. However, as in the second embodiment,
If the ejection keyboard 47 is not moved to a position where the tube 210 is completely crushed, the force applied to the ejection keyboard 47 does not need to be so large, and the advantage that the fluorine resin tube 210 that is hard to crush can be used. There is.

In the above embodiment, the pump 1 is connected to the discharge port 67
Are arranged to face downward. For example, the container 6
If the inside of 0 is pressurized so that the liquid 8 always flows into the inlet valve portion, it can be arranged sideways or upward. In the case of the pump 200 as well, as long as the liquid 8 is pumped into the tube 210, the direction is not limited to the above embodiment.

The pump of the present invention is not limited to the plunger pump 1 and the tube pump 200, but includes an inlet valve, an outlet valve, a metering chamber, and an inlet valve opening / closing member for opening and closing these, an outlet valve opening / closing member, and a discharge member. What is necessary is just a pump provided with a etc.

[0103]

According to the pump of the present invention, it is possible to operate at a high speed, to reduce the size, and to easily control the drive.

[Brief description of the drawings]

FIG. 1 is a front view showing a pump according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a driving unit of the pump according to the first embodiment.

FIG. 3 is a cross-sectional view illustrating a pump section of the pump according to the first embodiment.

FIG. 4 is a schematic perspective view showing each armature of the pump of the first embodiment.

FIG. 5 is a plan view showing a lower end of each rod of the pump according to the first embodiment.

FIG. 6 is an operation explanatory diagram of the pump of the first embodiment.

FIG. 7 is an operation explanatory view showing an operation continued from FIG. 6;

FIG. 8 is an operation explanatory diagram showing an operation continued from FIG. 7;

FIG. 9 is an operation explanatory view showing the operation subsequent to FIG. 8;

FIG. 10 is an operation explanatory view showing the operation following FIG. 9;

FIG. 11 is an operation explanatory diagram showing a continuation of the operation in FIG. 10;

FIG. 12 is a sectional view showing a pump according to a second embodiment of the present invention.

FIG. 13 is a schematic perspective view showing a pump section of the pump according to the second embodiment.

FIG. 14 is a schematic plan view showing a pump section of the pump according to the second embodiment.

FIG. 15 is an operation explanatory view of the pump of the second embodiment.

FIG. 16 is an operation explanatory diagram showing an operation continued from FIG. 15;

FIG. 17 is an operation explanatory view showing an operation continued from FIG. 16;

FIG. 18 is an operation explanatory diagram showing an operation continued from FIG. 17;

FIG. 19 is an operation explanatory diagram showing the operation subsequent to FIG. 18;

20 is an operation explanatory diagram showing an operation continued from FIG. 19. FIG.

FIG. 21 is a schematic perspective view showing a modification of the pump section of the second embodiment.

FIG. 22 is an enlarged sectional view showing a main part of a modification of FIG. 21;

FIG. 23 is a schematic view showing another modification of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plunger pump 2 Drive part 3 Pump part 5, 6 Body 8 Liquid 13 Valve opening / closing coil 14 Discharge suction coil 21 Outlet valve armature 22 Outlet valve drive rod 23 First coil spring 25 Outlet valve rod 26 Fifth coil spring 27 Outlet Keyboard 31 Inlet valve armature 32 Inlet valve drive rod 35 Inlet valve rod 36 Second coil spring 37 Inlet keyboard 41 Discharge member armature 42 Discharge member drive rod 43 Third coil spring 45 Discharge member rod 46 Fourth coil spring 47 Discharge Keyboard 51 Armature for setting discharge amount 60 Container 65 Valve block 66 Seal surface 67 Discharge port 70 Connection member 80 Support plate 90 Lid 100 Micrometer 101 Spindle 102 Adjusting bolt 200 Tube pump 202 Drive unit 20 Pump unit 210 tube 211 sleeve 220 tube retaining ring 230 receiving member 232 receiving surface 233 contact surface 320 tube retaining ring 330 threaded member

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 3H071 AA01 BB01 CC17 CC28 CC33 CC34 DD12 DD13 DD26 DD72 DD84 3H075 AA01 AA09 AA17 BB03 BB04 CC09 CC11 CC16 CC34 CC35 CC36 DA09 DB08 EE12 3H077 AA01 BB03 CC04 CC05 CC17 DD05 FF12 FF14 FF32 FF33 FF34 FF43 FF44 FF54

Claims (6)

[Claims] A pump unit having an inlet valve, an outlet valve and a measuring chamber, an inlet valve opening / closing member for opening / closing the inlet valve, an outlet valve opening / closing member for opening / closing the outlet valve, and changing the volume of the measuring chamber. And a discharge member for discharging the liquid by moving one of the inlet valve opening / closing member and the outlet valve opening / closing member in a valve closing direction to close the valve, and the other to open the valve. A valve opening / closing coil that moves in the valve direction; and a discharge / suction that moves the discharge member in one of a liquid discharge direction to reduce the volume of the measurement chamber and a liquid suction direction to increase the volume when the current is applied. A coil, an opening / closing member that is moved in the valve opening direction by the valve opening / closing coil of the inlet valve opening / closing member and the outlet valve opening / closing member, when no current is passed through the valve opening / closing coil, Close 1st move in valve closing direction An urging member, an opening / closing member that is moved in the valve closing direction by the valve opening / closing coil of the inlet valve opening / closing member and the outlet valve opening / closing member, when no current is applied to the valve opening / closing coil, A second biasing member that moves in a valve opening direction to open a valve, and moves the discharge member to the other of the liquid discharge direction and the liquid suction direction when no current is applied to the discharge suction coil. And a third urging member. 2. The pump according to claim 1, wherein when an electric current is applied to the valve opening / closing coil, the inlet valve opening / closing member moves in the valve closing direction and the outlet valve opening / closing member moves in the valve opening direction. The discharge member is configured to move in the liquid suction direction when a current is supplied to the discharge / suction coil, and when the current is not supplied to each coil, the first member is moved to the first position. A biasing member moves the outlet valve opening / closing member in a valve closing direction, a second biasing member moves the inlet valve opening / closing member in a valve opening direction, and a third biasing member moves the outlet valve opening / closing member in a valve opening direction.
A pump, wherein the urging member is configured to move the discharge member in a liquid discharge direction. 3. The pump according to claim 1, wherein the inlet valve opening / closing member and the outlet valve opening / closing member are provided with an inlet valve armature and an outlet valve armature so as to be movable together with the respective opening / closing members. Each of these armatures is arranged in series along a magnetic path formed when a current flows through the valve opening / closing coil, and the armature for the discharge member moves together with the discharge member in the discharge member. A pump, wherein the armature for a discharge member is provided along a magnetic path formed when a current is applied to the discharge suction coil. 4. The pump according to claim 3, wherein a discharge amount setting member is arranged on a side of the armature for the discharge member opposite to a pump portion side so as to be adjustable in position, and the armature for the discharge member and the discharge amount are arranged. The setting member is arranged in series along a magnetic path formed when a current flows through the discharge / suction coil, and the third biasing member biases the armature for the discharge member in the liquid discharging direction. Preferably, the fourth member is disposed between the discharge amount setting member and the armature for the discharge member, and further urges the discharge member in the liquid suction direction and has a smaller urging force than the third urging member. A pump provided with a biasing member. 5. The pump according to claim 4, wherein the armature for an inlet valve is fixed to an inlet valve opening / closing member, and the armature for an outlet valve is provided on the pump portion side of the inlet valve armature for each opening / closing member. The opening / closing member is provided with a locking portion to which an end face of the armature for the outlet valve on the side of the pump section can abut, and the first biasing member is provided with an outlet valve opening / closing member The second urging member is configured to be able to urge the inlet valve opening / closing member in the valve opening direction and to have a smaller urging force than the first urging member. A fifth urging member for urging the outlet valve opening / closing member in a valve opening direction and having a smaller urging force than the first urging member is provided, and a current is applied to the valve opening / closing coil. In some cases, the armature for the inlet valve is The armature for the outlet valve moves in the valve closing direction, and moves in the valve opening direction against the urging force of the first urging member so that the armatures come into contact with each other. And pump. 6. The pump according to claim 1, wherein the armature for the discharge member is moved before the stroke end when the discharge member is moved in a discharge direction for reducing the volume of the measuring chamber. When moving from to the stroke end position, simultaneously move the outlet valve opening and closing member,
A pump characterized in that the outlet member is closed so that the discharge member also reaches the stroke end position.