JP2009068451A - Liquid material delivery head and liquid material delivery device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid material delivery head making unnecessary adjustment of delivery quantity of liquid material in every replacement of the liquid material delivery head. <P>SOLUTION: The liquid material delivery head is provided with a plunger case 23 detachably and attachably connected to an end part of a pump drive shaft 13 which can turn around a center line A and can reciprocate in a center line A direction, and capable of turning and reciprocating integrally with the pump drive shaft 13; a plunger pump mechanism 24 stored in the plunger case 23; and a nozzle block 26 retaining the plunger case 23 in such a manner that the same can turn and reciprocate, and including a delivery block 25 delivering liquid material sucked by the plunger mechanism 24. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a liquid material ejection head and a liquid material ejection device, and more particularly to a liquid material ejection head suitable for ejecting a liquid material such as liquid crystal and a liquid material ejection device using the liquid material ejection head.

  For example, as described in Patent Document 1 below, there is known a plunger pump type liquid discharge device that sucks and discharges liquid using reciprocating movement of a plunger.

  This liquid discharge apparatus is composed of a motor and a pump unit. The pump unit includes a cylindrical container, a port member attached to the lower end of the container, a discharge nozzle attached to the port member, and a plunger pump mechanism accommodated in the container. The plunger pump mechanism includes a pump block in which a plunger insertion hole is formed, a plunger inserted in the plunger insertion hole so as to be reciprocally movable, and the like. The pump unit is configured by housing a plunger pump mechanism in a container and connecting a port member to the lower end of the container. A pump drive shaft connected to the motor is inserted into the container, and the pump drive shaft is connected to the plunger.

  When discharging the liquid from the discharge nozzle, the motor is driven, the driving force of the motor is transmitted to the plunger via the pump drive shaft, the plunger is rotated around the center line together with the pump block, and the plunger is centered. Move back and forth in the line direction. Along with these operations, the liquid is sucked into the plunger insertion hole, and the sucked liquid is discharged from the discharge nozzle.

Note that the amount of liquid discharged from the discharge nozzle in one discharge step is adjusted so as to be a target discharge amount. In this discharge amount adjustment, first, the plunger and the pump block are accommodated in the container, the port member is fixed to the lower end of the container and the pump part is assembled, and then the motor is driven to discharge the liquid from the discharge nozzle. Subsequently, the amount of liquid discharged from the discharge nozzle is measured, and the micrometer is operated according to the measurement result to adjust the reciprocal movement amount of the plunger or the rotation speed of the motor.
Japanese Patent Laid-Open No. 2005-16368

  However, in the above-described liquid ejecting apparatus, no consideration is given to the following points.

  When changing the type of liquid ejected from the ejection nozzle, the port member, plunger, or the like to which the liquid from the previous ejection process is attached is removed from the container and replaced in order to prevent mixing of the liquid.

  However, when the port member, the plunger, and the like are removed from the container, the parts constituting the pump unit such as the port member, the plunger, etc. are separated. For this reason, when the parts separated by being removed from the container are accommodated in the container again and the pump unit is assembled, the positional relationship between the parts changes and the liquid discharge amount changes. For this reason, the liquid discharge amount must be adjusted again.

  Thus, when each component constituting the pump part such as the port member and the plunger is removed from the container, it is time-consuming and time-consuming to adjust the liquid discharge amount every time the pump part is assembled. It is complicated.

  The present invention has been made to solve the above problems, and an object thereof is to provide a liquid material discharge head and a liquid material discharge device that can reduce the labor and time involved in changing the liquid material to be discharged. It is.

  A first feature according to an embodiment of the present invention is that, in the liquid material discharge head, removably coupled to an end of a pump drive shaft that is rotatable about a center line and reciprocally movable in the center line direction, A plunger case that can rotate and reciprocate integrally with a pump drive shaft, a plunger pump mechanism housed in the plunger case, and a plunger pump mechanism that holds the plunger case so that it can rotate and reciprocate. And a nozzle block having a discharge nozzle that discharges the liquid substance sucked by the liquid crystal.

  A second feature according to the embodiment of the present invention is that in the liquid substance discharge device, a pump drive shaft that is rotatable about a center line and reciprocally movable in the center line direction, and the pump drive shaft about the center line. A rotation drive unit that rotates, a reciprocation drive unit that reciprocates the pump drive shaft in a center line direction, and a liquid material discharge head according to the first feature.

  According to the present invention, when replacing the liquid material ejection head according to the type of liquid material to be ejected, the components constituting the liquid material ejection head are not dispersed even if the liquid material ejection head is removed, and the positional relationship between the components. Therefore, even when the liquid material discharge head is used again, the labor and time required for adjusting the discharge amount of the liquid material can be reduced.

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

  As shown in FIG. 1, the liquid substance discharge device 1 according to an embodiment of the present invention includes a motor 2 that is a rotation drive unit and a pump unit 3.

  A first holding case 4 is fixed to one end side of the motor 2, and an output shaft 5 of the motor 2 extends into the first holding case 4. A spline shaft 6 is connected to the output shaft 5, and a spline 7 is formed on the outer peripheral surface of the spline shaft 6. The output shaft 5 and the spline shaft 6 are located on the same center line A and rotate integrally around the center line A.

  A cylindrical body 8 is splined to the outer periphery of the spline shaft 6. A spline 9 is formed on the inner peripheral surface of the cylindrical body 8, and the spline 9 and the spline 7 are spline-coupled. The cylindrical body 8 can rotate about the center line A integrally with the spline shaft 6 and can slide in the direction of the center line A.

  The pump unit 3 includes a second holding case 10 connected to the first holding case 4, a third holding case 11 that is a holding unit connected to the second holding case 10, and a third holding case. And a liquid material discharge head 12 detachably connected to the head 11.

  The second holding case 10 is located on the outer peripheral portion of the spline shaft 6 and the cylinder 8 and holds the outer peripheral surface of the cylinder 8 so as to be slidable.

  In the third holding case 11, a pump drive shaft 13, a plate cam 14, a ball receiving member 15, a spring pressing member 16, and a compression spring 17 are accommodated.

  One end of the pump drive shaft 13 is connected to the cylinder 8 by a pin 18. The pump drive shaft 13 is disposed on the same center line A as the output shaft 5 of the motor 2, can rotate around the center line A integrally with the output shaft 5 and the cylinder 8, and is integrated with the cylinder 8. It is possible to reciprocate in the direction of the center line A.

  The plate cam 14 is rotatably provided with a support shaft 19 as a fulcrum, and an insertion hole 20 through which the pump drive shaft 13 is inserted is formed in a substantially central portion. An angle adjusting mechanism (not shown) for adjusting the rotation angle of the plate cam 14 that rotates with the support shaft 19 as a fulcrum is provided on the opposite side of the support shaft 19 across the insertion hole 20. The angle adjustment mechanism is, for example, a compression spring that urges the plate cam 14 in a direction to rotate in one direction about the support shaft 19 and a micro that presses the plate cam 14 from a direction opposite to the urging direction by the compression spring. It consists of a meter. In this case, by operating the micrometer, the plate cam 14 can be rotated in the direction of arrow B with the support shaft 19 as a fulcrum, and the inclination angle of the plate cam 14 with respect to the pump drive shaft 13 can be adjusted. The insertion hole 20 is formed with a hole diameter that does not contact the outer peripheral surface of the pump drive shaft 13 even when the plate cam 14 is rotated to a position where the maximum angle is obtained.

  The ball receiving member 15 is fixed to the pump drive shaft 13 by a pin 21, can be rotated integrally with the pump drive shaft 13, and can be reciprocated. A ball 22 is held on the ball receiving member 15 in a rollable manner, and the ball 22 is in contact with one surface of the plate cam 14.

  The spring pressing member 16 is slidably attached to the pump drive shaft 13. One surface of the spring pressing member 16 is in contact with the ball receiving member 15.

  One end of the compression spring 17 is held by the third holding case 11, the other end is brought into contact with the other surface of the spring pressing member 16, and the urging force of the compression spring 17 acts on the spring pressing member 16. When the urging force of the compression spring 17 acts on the spring pressing member 16, the spring pressing member 16 is in contact with the ball receiving member 15. Further, the urging force of the compression spring 17 acts on the ball receiving member 16, so that the ball 22 is in contact with one surface (lower surface) of the plate cam 14.

  The plate cam 14, the ball receiving member 15, the spring pressing member 16, the compression spring 17, and the motor 2 constitute a reciprocating drive unit that reciprocates the pump drive shaft 13 in the direction of the center line A. Yes.

  The liquid substance discharge head 12 holds the plunger case 23, the plunger pump mechanism 24 accommodated in the plunger case 23, and the plunger case 23, and discharges the liquid substance (for example, liquid crystal) sucked by the plunger pump mechanism 24. And a nozzle block 26 having discharge nozzles 25. The liquid substance discharge head 12 is detachably attached to the third holding case 11. The plunger case 23 is detachably connected to the end of the pump drive shaft 13.

  The plunger case 23 and the pump drive shaft 13 are connected as shown in FIGS. An engagement recess 27 having a rectangular shape in plan view is formed in the center of the end of the pump drive shaft 13, and an engagement having a rectangular shape in plan view engaged with the engagement recess 27 is formed at the end of the plunger case 23. A convex portion 28 is formed. The engaging recess 27 is formed on the center line A of the pump drive shaft 13. Between the engagement concave portion 27 and the engagement convex portion 28, the pump drive shaft 13 and the plunger case 23 are detachably connected in a state where the engagement concave portion 27 and the engagement convex portion 28 are engaged. In addition, a coupling mechanism 29 is provided that allows the pump drive shaft 13 and the plunger case 23 to be integrally rotated around the center line A, and can be reciprocated integrally in the direction of the center line A.

  The coupling mechanism 29 is formed in a direction orthogonal to the center line A of the pump drive shaft 13, and a pair of attachment holes 30 that communicate the outer peripheral surface of the pump drive shaft 13 and the engagement recess 27, and is accommodated in the attachment holes 30. The ball 31 and the compression spring 32 are formed, and the engagement groove 33 is formed on the engagement protrusion 28 and the ball 31 is engaged therewith.

  The pair of mounting holes 30 are formed at positions 180 ° apart from each other with the center line A of the pump drive shaft 13 in between. The ball 31 accommodated in the mounting hole 30 and the compression spring 32 are connected to each other, and the ball 31 is directed to the engagement recess 27 side. The end of the mounting hole 30 on the side where the compression spring 32 is located is closed by a set screw 30a. The ball 31 can be projected and retracted from the end of the mounting hole 30.

  The engaging protrusion 28 formed at the end of the plunger case 23 is formed with an engaging groove 33 into which the ball 31 is engaged when the engaging protrusion 28 is engaged with the engaging recess 27. ing. The engagement groove 33 is formed in a straight line along the side surface of the engagement protrusion 28. When engaging the engaging convex portion 28 with the engaging concave portion 27, the ball 31 protruding from the mounting hole 30 is pushed by the engaging convex portion 28 and is once pushed into the mounting hole 30. , The ball 31 biased by the compression spring 32 protrudes from the mounting hole 30 and is engaged with the engagement groove 33. By engaging the ball 31 with the engagement groove 33, the pump drive shaft 13 and the plunger case 23 can be rotated integrally around the center line A of the pump drive shaft 13 via the ball 31.

  When disconnecting the plunger case 23 and the pump drive shaft 13, the plunger case 23 is pulled in a direction (downward in the drawing) in which the engaging convex portion 28 is extracted from the engaging concave portion 27. By this pulling operation, the ball 31 pushed by the tip end portion of the engaging convex portion 28 is once pushed into the mounting hole 30, and the engaging convex portion 28 passes through a position facing the ball 31 to engage with the ball 31. The engagement with the mating groove 33 is released, the engagement convex portion 28 comes out of the engagement concave portion 27, and the connection between the plunger case 23 and the pump drive shaft 13 is released.

  The nozzle block 26 includes a flange 34, a nozzle base 35, and a case 36, and is configured by connecting the flange 34, the nozzle base 35, and the case 36. The nozzle base 35 and the case 36 are connected by a plurality of bolts (not shown), and the case 36 and the flange 34 are connected by a plurality of bolts 37. The case 36 and the flange 34 are detachably connected to the third holding case 11 by a plurality of bolts 38.

  The flange 34 is formed in a ring shape having a hollow portion at the center. The plunger case 23 is held in the hollow portion of the flange 34 via a bearing 39 and a resin sleeve 40, and the plunger case 23 can be rotated around the center line A and can be reciprocated in the direction of the center line A. ing. The bearing 39 is fixed to the outer peripheral portion of the plunger case 23, and a sleeve 40 is interposed between the outer peripheral surface of the bearing 39 and the inner peripheral surface of the hollow portion of the flange 34, and the outer peripheral surface of the bearing 39 and the sleeve 40 are The inner surface is slidable. Further, a bearing retainer 41 for holding the bearing 39 in a fixed position is attached to the outer peripheral surface of the plunger case 23.

  The case 36 is formed in a cylindrical shape having a hollow portion at the center, and has one end surface in contact with the end surface of the flange 34 and the other end surface in contact with the nozzle base 35. One end side of the plunger case 23 enters the hollow portion of the case 36. An O-ring 42 is interposed between the end surface of the case 36 that is in contact with the end surface of the flange 34.

  The nozzle base 35 is formed with a suction passage 43 for sucking a liquid substance and a discharge passage 44 for discharging the liquid substance. One end of the suction passage 43 and one end of the discharge passage 44 are opened in a smooth sliding contact surface 45 facing the hollow portion of the case 36. A discharge nozzle 25 communicating with the discharge passage 44 is fixed to the nozzle base 35 with a fixing screw 46.

  The plunger pump mechanism 24 includes a valve member 47, a plunger 48, and a compression spring 49, and is accommodated in the plunger case 23.

  The valve member 47 is formed in a columnar shape, and a smooth sliding contact surface 47 a formed at one end is in contact with the sliding contact surface 45 of the nozzle base 35. The valve member 47 is formed with a plunger insertion hole 50 penetrating the valve member 47 at a position parallel to the center line A and eccentric with respect to the center line A.

  The plunger 48 includes a small diameter portion 48 a that can be inserted into the plunger insertion hole 50 and a large diameter portion 48 b that is larger in diameter than the plunger insertion hole 50. The small diameter portion 48 a is inserted into the plunger insertion hole 50 so as to be reciprocally movable. Yes. The inner diameter dimension of the plunger insertion hole 50 and the outer diameter dimension of the small diameter part 48 a are formed to be substantially the same dimension, and when the small diameter part 48 a of the plunger 48 reciprocates in the plunger insertion hole 50, Is switched between a reduced pressure state and a pressurized state.

  One end of the compression spring 49 is held by a stepped portion 51 formed on the valve member 47, and the other end is held by a stepped portion 52 formed on the large diameter portion 48 b of the plunger 48. By holding the compression spring 49 between the step portion 51 and the step portion 52, the urging force of the compression spring 49 acts on the valve member 47 and the plunger 48, and the sliding contact surface 47a of the valve member 47 becomes the nozzle base. 35 is in contact with the slidable contact surface 45, and the distal end portion of the plunger 48 on the large diameter portion 48 b side is in contact with the inner peripheral surface of the plunger case 23.

  The plunger pump mechanism 24 (the valve member 47, the plunger 48, and the compression spring 49) is provided so as to be rotatable about the center line A integrally with the plunger case 23 and the pump drive shaft 13. When the valve member 47 is rotated around the center line A, the opening of the plunger insertion hole 50 formed in the sliding contact surface 47a becomes the opening of the suction passage 43 formed in the sliding contact surface 45 and the discharge passage. It communicates with 44 openings alternately. FIG. 2 shows a state in which the opening of the plunger insertion hole 50 communicates with the opening of the discharge passage 44. FIG. 3 shows a state in which the opening of the plunger insertion hole 50 communicates with the opening of the suction passage 43.

  Further, the plunger 48 is provided integrally with the plunger case 23 and the pump drive shaft 13 so as to be capable of reciprocating in the direction of the center line A. When the plunger 48 reciprocates in the direction of the center line A, the pressure on the side of the plunger insertion hole 50 that communicates with the suction passage 43 or the discharge passage 44 is switched to a reduced pressure state or a pressurized state.

  The connection of the liquid material discharge head 12 to the third holding case 11 is performed according to the following procedure. First, the plunger case 23 and the pump drive shaft are pressed by pushing the engagement convex portion 28 of the plunger case 23 of the liquid material discharge head 12 into the engagement concave portion 27 of the pump drive shaft 13 and engaging the ball 31 with the engagement groove 33. 13 is connected. Next, by tightening the bolt 38, the connection of the liquid material discharge head 12 to the third holding case 11 is completed. The third holding case 11 is provided with a packing 53 that is in close contact with the outer periphery of the plunger case 23 connected to the pump drive shaft 13 and a disc spring 54 that presses the packing 53.

  The operation of the liquid material discharge apparatus 1 when a liquid material (for example, liquid crystal) is discharged from the discharge nozzle 25 in such a configuration will be described. The suction passage 43 is connected to a storage tank that stores a liquid substance by a pipe (not shown).

  When the motor 2 is driven, the output shaft 5, the spline shaft 6, the cylindrical body 8, the pump drive shaft 13, and the ball receiving member 15 rotate integrally around the center line A.

  A biasing force of a compression spring 17 acts on the ball receiving member 15 via a spring pressing member 16, and the ball 22 of the ball receiving member 15 is applied to the ball receiving member 15 of the plate cam 14 by the biasing force of the compression spring 17. It is in contact with the opposite surface (lower surface). Therefore, when the ball receiving member 15 rotates around the center line A integrally with the pump drive shaft 13, the ball receiving member 15 maintains the state in which the ball 22 is in contact with the surface of the plate cam 14 while maintaining the center line. Rotate around A. Since the surface of the plate cam 14 with which the ball 22 is in contact is inclined with respect to the center line A, the ball receiving member 15 rotates around the center line A in the direction of the center line A. Move back and forth. As the ball receiving member 15 reciprocates in the direction of the center line A, the pump drive shaft 13 connected to the ball receiving member 15 also reciprocates integrally with the ball receiving member 15. As the pump drive shaft 13 reciprocates in the direction of the center line A, the spline 9 of the cylinder 8 and the spline 7 of the spline shaft 6 slide.

  Therefore, by driving the motor 2, the pump drive shaft 13 rotates around the center line A and reciprocates in the direction of the center line A.

  The operation of the pump drive shaft 13 is transmitted to the plunger case 23, and the plunger case 23 rotates around the center line A integrally with the pump drive shaft 13 and reciprocates in the direction of the center line A.

  When the plunger case 23 rotates about the center line A, the plunger pump mechanism (valve member 47, plunger 48, compression spring 49) 24 accommodated in the plunger case 23 also rotates integrally. Then, when the valve member 47 rotates around the center line A, as shown in FIG. 2, the position where the opening of the plunger insertion hole 50 communicates with the opening of the discharge passage 44, and as shown in FIG. The opening of the plunger insertion hole 50 is switched to a position communicating with the opening of the suction passage 43. This switching is performed every time the plunger case 23 rotates 180 ° around the center line A. The urging force of the compression spring 49 acts on the valve member 47, and the valve member 47 is maintained in a state where the slidable contact surface 47a is in contact with the slidable contact surface 45 of the nozzle block 26.

  Further, when the plunger case 23 reciprocates in the direction of the center line A, the plunger 48 is configured such that the distal end portion of the large diameter portion 48 b is brought into contact with the inner peripheral surface (inner upper surface) of the plunger case 23 by the urging force of the compression spring 49. Reciprocates in the direction of the center line A together with the plunger case 23. As the plunger 48 reciprocates in the direction of the center line A, the small diameter portion 48 a reciprocates within the plunger insertion hole 50. And the small diameter part 48a moves to the direction (upward direction shown in FIG. 3) which leaves | separates from the nozzle block 26, and the pressure in the plunger insertion hole 50 will be in a pressure reduction state. Further, when the small diameter portion 48a moves in the direction approaching the nozzle block 26 (downward direction shown in FIG. 2), the pressure in the plunger insertion hole 50 becomes a pressurized state.

  The timing of the rotation operation and the reciprocation operation of the plunger pump mechanism 24 will be described. As shown in FIG. 3, when the plunger insertion hole 50 communicates with the suction passage 43, the plunger 48 moves upward, and the pressure in the plunger insertion hole 50 is reduced. Furthermore, as shown in FIG. 2, when the plunger insertion hole 50 communicates with the discharge passage 44, the plunger 48 moves downward, and the pressure in the plunger insertion hole 50 is in a pressurized state.

  For this reason, as shown in FIG. 3, when the plunger insertion hole 50 communicates with the suction passage 43, the plunger 48 moves upward, the pressure in the plunger insertion hole 50 is reduced, and the liquid substance flows into the suction passage. Inhaled toward the plunger insertion hole 50 through 43.

  After the liquid substance is sucked into the plunger insertion hole 50, the valve member 47 rotates about the center line A integrally with the plunger case 23 as shown in FIG. It communicates with the discharge passage 44. When the plunger insertion hole 50 communicates with the discharge passage 44, the plunger 48 moves downward, and the pressure in the plunger insertion hole 50 is in a pressurized state. Thereby, the liquid material sucked into the plunger insertion hole 50 is discharged toward the discharge nozzle 25.

  When the liquid material to be discharged is changed to another liquid material of a different type, the liquid material discharge head 12 is replaced in order to prevent mixing of the liquid materials.

  When replacing the liquid material discharge head 12, the bolt 38 connecting the nozzle block 26 to the third holding case 11 is removed, and the engaging projection 28 of the plunger case 23 and the engaging recess of the pump drive shaft 13 are removed. The liquid material discharge head 12 is pulled in a downward direction, which is a direction in which the engagement with the member 27 is released. Thereby, the plunger pump mechanism 24 is separated from the pump drive shaft 13, and the liquid material discharge head 12 can be detached from the third holding case 11. After the removal of the liquid material discharge head 12 is finished, another liquid material discharge head is attached to the third holding case 11 and the motor 2 is driven to change the type of the discharge nozzle of the attached liquid material discharge head. Liquid material is discharged.

  When the liquid material discharge head 12 is removed from the third holding case 11, the removed liquid material discharge head 12 is maintained in a state in which the plunger case 23, the plunger pump mechanism 24, and the nozzle block 26 are connected to each other. Each component constituting the substance discharge head 12, in particular, the valve member 47 and the nozzle base 35 is not dispersed, and the positional relationship between the components is maintained. Such a plunger case 23 has a function of integrally holding the plunger pump mechanism 24 and the nozzle block 26 and a function of transmitting the driving force of the pump drive shaft 13 to the plunger pump mechanism 24.

  Further, since the O-ring 42 is interposed between the end face of the case 36 and the end face of the flange 34, the liquid substance discharge head 12 is stored while the liquid substance is put in the liquid substance discharge head 12. However, the liquid material can be prevented from leaking from between the case 36 and the flange 34.

  When returning the liquid material to be discharged to the original liquid material, the other liquid material discharge head attached to the third holding case 11 is detached from the third holding case 11 and the liquid material discharged once removed. The head 12 is attached to the third holding case 11 again. At the time of attachment, the engaging convex portion 28 of the plunger case 23 is pushed into the engaging concave portion 27 of the pump drive shaft 13 to be engaged, the ball 31 is engaged with the engaging groove 33, and the plunger case 23 is engaged with the pump drive shaft. 13 is connected. Next, the bolt 38 is tightened, and the attachment of the liquid material discharge head 12 to the third holding case 11 is completed.

  When the liquid material discharge head 12 once removed from the third holding case 11 is used by being attached to the third holding case 11 again, the liquid material discharge head 12 constitutes the liquid material discharge head 12 once removed. The positional relationship of each part is maintained the same as before removal. For this reason, even after the attachment is performed again, the discharge amount of the liquid material discharged from the discharge nozzle 25 is maintained at the same amount as before the removal. Therefore, when the once removed liquid substance discharge head 12 is attached to the third holding case 11, it is not necessary to adjust the discharge amount of the liquid substance every time it is attached, and the labor and time required for adjusting the discharge amount of the liquid substance are reduced. Can be greatly reduced.

  In this way, it is not necessary to adjust the discharge amount of the liquid material accompanying the removal / attachment of the liquid material discharge head 12. For this reason, when such a liquid material discharge head 12 is applied to a liquid crystal dropping device used for manufacturing a liquid crystal display panel, the labor and time required for adjusting the discharge amount of liquid crystal accompanying the replacement of the liquid material discharge head 12 are reduced. Is greatly reduced. Thereby, the operation rate of the liquid crystal dropping device can be improved, and as a result, the productivity of the liquid crystal display panel can be improved.

  In this embodiment, regarding the connection structure between the plunger case 23 and the pump drive shaft 13, an engagement convex portion 28 is formed on the plunger case 23, and an engagement concave portion 27 is formed on the pump drive shaft 13, thereby driving the pump. The case where the ball 31 and the compression spring 32, which are part of the coupling mechanism 29, are provided on the shaft 13 has been described as an example, but is not limited to this structure. For example, a ball 31 that is a part of the coupling mechanism 29 and a compression spring 32 may be provided on the engagement convex portion 28, and an engagement groove 33 in which the ball 31 is engaged with the pump drive shaft 13 may be formed. Alternatively, the engaging concave portion 27 may be formed in the plunger case 23 and the engaging convex portion 28 may be formed in the pump drive shaft 13.

  When the liquid material discharge head 12 is prepared for each type of liquid material, a discharge device dedicated for adjusting the discharge amount is provided separately from the liquid material discharge device 1, and the discharge device dedicated for adjusting the discharge amount is provided. It is preferable to adjust the discharge amount of each liquid material discharge head 12 in advance. Even in this case, even if the plunger pump mechanism 24 (liquid substance discharge head 12) is separated from the pump drive shaft of the discharge device dedicated to discharge amount adjustment, the plunger case 23, the plunger pump mechanism 24, and the nozzle block 26 are not They are kept connected to each other. For this reason, when the liquid material discharge head 12 is attached to the liquid material discharge device 1, the discharge amount adjusted by the discharge device dedicated for discharge amount adjustment is reproduced. For this reason, the labor and time required for adjusting the discharge amount of the liquid material on the liquid material discharge device 1 can be greatly reduced, and the operating rate of the liquid material discharge device 1 can be improved.

1 is a front view showing a part of a liquid substance discharge device according to an embodiment of the present invention in cross section. It is a longitudinal front view which expands and shows the liquid material discharge head of the state which discharges a liquid material. It is a longitudinal front view which expands and shows the liquid material discharge head of the state which inhales a liquid material. It is a vertical front view which expands and shows the connection part of a plunger case and a pump drive shaft. FIG. 5 is a horizontal cross-sectional view of the connecting portion shown in FIG. 4.

Explanation of symbols

2 Motor (Rotation drive unit)
12 Liquid substance discharge head 13 Pump drive shaft 23 Plunger case 24 Plunger pump mechanism 25 Discharge nozzle 26 Nozzle block 27 Engagement recess 28 Engagement projection 29 Connection mechanism 34 Flange 35 Nozzle base 43 Suction passage 44 Discharge passage 47 Valve member 48 Plunger 50 Plunger insertion hole

Claims (5)

A plunger case that is removably connected to an end of a pump drive shaft that is rotatable about a center line and reciprocally movable in the direction of the center line; and a plunger case that is rotatable and reciprocally movable integrally with the pump drive shaft;
A plunger pump mechanism housed in the plunger case;
A nozzle block having a discharge nozzle for holding the plunger case in a rotatable and reciprocating manner and discharging a liquid substance sucked by the plunger pump mechanism;
A liquid material discharge head comprising: The plunger pump mechanism is
A valve member formed with a plunger insertion hole and rotatable integrally with the plunger case;
A plunger that is inserted into the plunger insertion hole and is rotatable and reciprocating integrally with the plunger case;
With
The liquid substance discharge head according to claim 1, wherein the pressure in the plunger insertion hole is switched between a reduced pressure state and a pressurized state by the reciprocating movement of the plunger. The nozzle block is
A flange for removably connecting the pump drive shaft to a holding portion for accommodating the pump drive shaft around the center line and reciprocating in the direction of the center line; ,
A suction passage that is detachably connected to the flange and sucks the liquid material, and a discharge passage that is connected to the discharge nozzle and discharges the liquid material, and these suction passage and discharge passage are the valve member. A nozzle base that is alternately communicated with the plunger insertion hole with the rotation of
The liquid substance discharge head according to claim 1, further comprising: An engagement recess is formed at one of the pump drive shaft and the plunger case at the connecting portion between the end of the pump drive shaft and the plunger case, and the other is engaged with the engagement recess. Part is formed,
A coupling mechanism that removably couples the pump drive shaft and the plunger case between the engagement recess and the engagement projection with the engagement recess and the engagement projection engaged. The liquid material discharge head according to claim 1, wherein the liquid material discharge head is provided. A pump drive shaft that can rotate around the center line and reciprocate in the direction of the center line;
A rotation drive unit for rotating the pump drive shaft around a center line;
A reciprocating drive unit for reciprocating the pump drive shaft in a center line direction;
A liquid substance discharge head according to any one of claims 1 to 4,
A liquid substance discharge device comprising:

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