JP2013096405A - Cam type fluid ejection apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cam type fluid ejection apparatus that can eject a constant amount of fluid without causing leak by precisely attaining the rotation and reciprocating movement of a plunger by using a simple mechanism including a single drive portion and two cam portions, and that can simply adjust an ejection amount of the fluid by adjusting a vertical movement distance of the plunger.SOLUTION: The cam type fluid ejection apparatus includes: a shaft that is provided rotatably to a housing; a cam mechanism that includes a first cam portion and a second cam portion arranged rotatably to the shaft; a vertically reciprocating drive portion that is arranged on one side of the cam mechanism and can vertically turn by the movement interlocked with the first cam portion; a plunger portion that can move downward through the turn of the vertically reciprocating drive portion and is configured to rotate with the second cam portion of the cam mechanism; and a nozzle unit that is arranged below the plunger portion, causes the fluid to flow in or eject through the vertical movement of the plunger portion and also causes an inflow port and a discharge port for the fluid to be opened and closed through the rotary movement of the plunger portion.

Description

  The present invention relates to a discharge device, which leaks by accurately implementing rotation and reciprocation of a plunger using a single drive unit and a single cam mechanism composed of two cam units. The present invention relates to a cam-type fluid discharge device that can discharge a fixed amount of fluid and easily adjust the discharge amount.

  Recently, in the electronic component industry, devices for discharging fluids such as functional light emitters of LEDs, ultra-fine cream solder, adhesives, etc. in a set amount have been developed and used.

  FIG. 10 shows a general structure of a plunger type fluid ejection device which is one of such fluid ejection devices.

  The plunger-type fluid discharge device includes a housing 1, a cylinder 2 disposed in the housing 1, a plunger 4 that reciprocates and rotates in the vertical direction within the cylinder 2, and a nozzle mechanism 5 that is attached to the lower end of the cylinder 2.

  The plunger 4 is lifted from the bottom dead center by a drive unit not shown in the drawing, and at that time, a suction port 2-1 of a flow path formed on one side of the cylinder 2 and a notch portion 4-1 formed on the plunger 4 are provided. Correspondingly, the fluid flows into the suction port 2-1.

  The plunger 4 rotates until the plunger 4 reaches the top dead center, and the notch portion 4-1 does not correspond to the suction port 2-1 of the cylinder 2. Therefore, the fluid does not flow into the flow path of the cylinder 2. At this time, the discharge port 2-2 of the flow path of the cylinder 2 does not correspond to the notch portion 4-1 of the plunger 4 (that is, the inflow of fluid is completed).

  Thereafter, the notch portion 4-1 of the plunger 4 corresponds to the discharge port 2-2 of the flow path of the cylinder 2 by the rotation of the plunger 4 (state of FIG. 10), and the fluid in the flow path of the cylinder 2 by the lowering of the plunger 4 Is started to be discharged through the nozzle mechanism 5 attached to the lower end of the cylinder 2 through the discharge port 2-2. The fluid discharge continues until the plunger 4 reaches the bottom dead center. At this time, the notch part 4-1 of the plunger 4 and the suction port 2-1 of the cylinder 2 maintain the state which does not respond | correspond.

  When the plunger 4 reaches the bottom dead center, the discharge of the fluid is completed, and the notch portion 4-1 of the plunger 4 and the discharge port 2-2 of the cylinder 2 do not correspond. Thereafter, the plunger 4 is raised and rotated, and the fluid inflow and discharge described above are repeated.

  Such a plunger-type fluid discharge device is characterized in that a valve for controlling the flow of fluid is not included in the constituent elements. The fact that there is no valve can eliminate the variation factor caused by the valve, and the fluid can be transferred and discharged in an ideal state.

  Further, the plunger type fluid discharge device having the structure shown in FIG. 10 has an advantage that a pump capable of changing various types of fluids is not required.

  However, in the plunger-type fluid discharge device, since the plunger rotates continuously, the suction completion and the discharge completion must be instantaneously performed. In such a state, the fluid in the cylinder flow path may leak through the suction port and the discharge port. In particular, when the fluid is discharged at a high pressure in order to increase the discharge amount, such a leakage amount of the fluid cannot be ignored.

  In order to solve such a problem, a structure in which the plunger is rotated and reciprocated using two drive units is used. However, since such a structure uses two drive units, the space of components in the apparatus is used. There is a problem that the arrangement is difficult and the manufacturing cost is high.

JP 2006-308105 A

  According to the present invention, a fixed amount of fluid can be discharged without leaking by accurately realizing the rotation and reciprocation of the plunger using a single drive unit and a single cam mechanism composed of two cam units. It is an object of the present invention to provide a cam type fluid discharge device.

  Another object of the present invention is to provide a cam type discharge device that can adjust the amount of vertical movement of the plunger and can easily adjust the amount of fluid discharged.

  In order to achieve the above object, a cam-type fluid ejection device according to an embodiment of the present invention includes a shaft rotatably provided on a housing, a first cam portion rotatably disposed on the shaft, and a second cam portion. A cam mechanism including a cam portion, and a vertical reciprocating drive portion which is disposed on one side of the cam mechanism and can be rotated up and down by interlocking with the first cam portion, and can be moved up and down by rotation of the vertical reciprocating drive portion. A plunger portion configured to be rotatable by the second cam portion of the cam mechanism, and a lower portion of the plunger portion. The fluid is introduced and discharged by the vertical movement of the plunger portion, and the fluid is moved by the rotational movement of the plunger portion. An inflow port and a discharge port.

  The first cam portion constituting the cam mechanism may include a cylindrical main body disposed on the shaft and a single groove formed on the outer peripheral surface of the main body. The groove includes a top dead center and a bottom dead center formed in regions corresponding to both ends of the diameter passing through the center of the cross section of the main body, and two curved portions connecting the top dead center and the bottom dead center, respectively.

  The vertical reciprocating drive unit includes a roller accommodated in the groove, and the vertical reciprocating drive unit repeats downward rotation and upward rotation as the first cam portion rotates.

  The vertical reciprocating drive unit is mounted on the housing so as to be rotatable about a central axis, and a link member on which a roller housed in a groove of the first cam unit is mounted and a second terminal portion can be rotated on the link member. The first terminal portion may include a plate rotatably mounted on the housing. With such a structure, the link member rotates about the central axis as the first cam portion of the cam mechanism rotates, and the plate rotates about the second end portion by the rotation of the link member. Move the part up and down.

  The link member includes first and second links that are rotatably fixed to the housing by a central shaft mounted on a side surface, a connection link that connects the first link and the second link, and an end of the connection link. The inner side surface may include an extension link on which a roller is mounted.

  The vertical reciprocating drive unit may further include a length adjusting unit that adjusts the position of the plate with respect to the link member. The length adjusting unit includes a plate driving portion and a casing in which a driving shaft of the plate driving portion is accommodated and one end is fixed to the plate. As the drive shaft is driven, the casing moves toward the link member or the plate drive portion by the action of the spiral portion formed on the outer peripheral surface of the drive shaft and the inner peripheral surface of the casing. Both end portions of the hinge shaft provided at the first end portion of the plate are movably positioned in guide grooves formed in the housing. Both end portions of the hinge shaft provided at the second end portion are movably positioned in guide grooves formed on the first and second links of the link member. As the casing of the length adjusting unit moves, the link member moves along the guide groove of the housing and the guide grooves of the first and second links.

  The plunger portion is arranged in the casing so as to be vertically movable and rotatable, a coupler coupled to the lower end of the shaft, a separating member fixed to the lower end of the coupler of the plunger portion and separating the space of the casing, and the shaft of the plunger portion A plunger that is fixed to the lower end of the nozzle and that opens and closes the inflow port and the discharge port so that fluid can flow in and out in the nozzle unit through the separation member, and is disposed below the separation member so as to surround the plunger. And a spring that returns the moved plunger.

  A planar spherical bearing may be attached to the upper end of the shaft. The flat surface portion of the flat spherical bearing contacts the lower surface of the plate of the vertical reciprocating drive portion, and the spherical surface portion of the flat spherical bearing is supported by a spherical surface formed on the upper end surface of the shaft of the plunger portion.

  The lower end of the plunger has a notch with a side notched to a certain depth, width, and length (height), and fluid flows in and out of the nozzle unit through this notch. The port and the discharge port may be opened and closed.

  The nozzle unit from which the fluid is discharged may include a block installed at the lower end of the casing of the plunger portion and a nozzle coupled to the lower end of the block. The block has a space in which the plunger of the plunger portion is accommodated, and an inflow port and an exhaust port respectively communicating with the internal space of the block are formed on both sides of the internal space, and the inflow port is connected to an external fluid storage portion. Connected, the discharge port is connected with the nozzle.

  The cam-type fluid discharge device may further include a power transmission unit that is disposed between the cam mechanism and the plunger unit and selectively transmits the rotational force of the second cam unit of the cam mechanism to the plunger of the plunger unit.

  The power transmission unit may include a shaft rotatably mounted on the housing and a power transmission member mounted on the shaft of the power transmission unit and interlocking with the second cam unit of the cam mechanism. The power transmission member includes a disk-like plate through which the shaft of the power transmission part passes at the center, and a number of first rollers and a number of second rollers fixed to the disk-like plate, respectively. Have the same angular spacing. The second cam portion of the cam mechanism interlocked with such a power transmission member includes a first disk-shaped plate and a second disk-shaped plate mounted on the shaft of the power transmission portion with a predetermined interval. The outer peripheral surface of the first disc-shaped plate corresponds to the outer peripheral surface of the first roller of the power transmission unit, and the outer peripheral surface of the second disc-shaped plate corresponds to the outer peripheral surface of the second roller of the power transmission unit. Each disk-like plate is formed with a hemispherical protrusion that protrudes from the outer peripheral surface and can enter the space between the corresponding rollers of the power transmission member.

  With the configuration of the power transmission unit and the second cam unit of the cam mechanism, when the rollers of the vertical reciprocating drive unit are positioned at the top dead center and the bottom dead center of the groove of the first cam unit, The rotational force of the second cam portion is not transmitted to the plunger portion so that the outer peripheral surface of the disk-shaped plate corresponds to the outer peripheral surface of the corresponding roller of the power transmission member.

  Such a fluid ejecting apparatus according to the present invention does not leak by accurately implementing the rotation and reciprocation of the plunger using a single drive unit and a single cam mechanism including two cam units. A fixed amount of fluid can be discharged.

  Moreover, the effect which can adjust easily the discharge amount of the fluid according to a target object by the structure which can adjust the length of the plate with respect to a link member easily is acquired.

1 is a front sectional view of a fluid ejection device according to an embodiment of the present invention. It is a top view of FIG. It is sectional drawing which follows the line AA of FIG. It is drawing which shows the state which the plunger of FIG. 1 raised. It is drawing which shows the state which the plunger of FIG. 1 fell. It is drawing which shows the relationship between a plunger and a nozzle roughly. It is another drawing which shows roughly the relationship between a plunger and a nozzle. It is another drawing which shows roughly the relationship between a plunger and a nozzle. It is another drawing which shows roughly the relationship between a plunger and a nozzle. It is a schematic block diagram of a general plunger type fluid ejection device.

  Hereinafter, a fluid ejection device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a front sectional view of a fluid ejection device according to an embodiment of the present invention. FIG. 2 is a plan view of FIG. FIG. 3 is a sectional view taken along line AA in FIG.

  Each component which comprises the fluid discharge apparatus by embodiment of this invention is arrange | positioned in the housing with which the drive part was mounted | worn.

  The fluid discharge device includes a shaft 101, a cam mechanism 100 including a first cam portion 110 and a second cam portion 120 that are connected to the shaft 101 to rotate, and a vertical reciprocating drive that is linked to the first cam portion 110 of the cam mechanism 100. Part 200, a power transmission unit 300 interlocking with the second cam part 120 of the cam mechanism 100, a plunger part 400 that is moved up and down by the vertical reciprocating drive part 200 and the power transmission part 300, and a lower end of the plunger part 400. And a nozzle unit (not shown in FIGS. 1 to 5, 500 in FIGS. 6 to 9).

  The configuration and function of each component will be described separately.

<Cam mechanism 100>
The cam mechanism 100 includes a shaft 101, and a first cam portion 110 and a second cam portion 120 that are respectively mounted (or formed) on the outer peripheral surface of the shaft 101.

  The shaft 101 is rotatably mounted on the housing 10 via a bearing B or the like, and one end thereof is connected to the drive shaft of the first drive unit 20 mounted outside the housing 10.

  A first cam portion 110 is attached to the lower outer peripheral surface of the shaft 101. The first cam portion 110 includes a cylindrical main body 111 and a single groove 112 formed on the outer peripheral surface of the main body. The groove 112 has a top dead center T and a bottom dead center L, and a top dead center and a bottom dead center respectively formed in opposite areas of the main body 111 (that is, areas corresponding to both ends of the diameter passing through the center of the cross section). And two curved portions to be connected.

  The second cam portion 120 is attached (formed) to the lower portion of the first cam portion 110. The second cam portion 120 is a cylindrical member, and the second cam portion 120 is shown in a box shape in FIG. 1 for convenience, but the configuration is shown in detail in FIG.

  The second cam portion 120 includes first and second disc-like plates 121 and 122 attached to the shaft 101. The first and second disk-shaped plates 121 and 122 have a predetermined interval in the vertical direction, and two projecting portions 121A, 121B, 122A, and 122B projecting in the radial direction are formed on the outer peripheral surface.

  The two projecting portions 121A, 121B, 122A, 122B of each disk-shaped plate 121, 122 have a predetermined angular interval, and the outer peripheral surface thereof has a hemispherical shape.

  The second cam part 120 having such a structure can be interlocked with a power transmission part 300 described later, and selectively transmits the rotational force of the first driving part 20 to the plunger part 400.

<Up-down reciprocating drive unit 200>
The vertical reciprocating drive unit 200 is disposed on one side of the cam mechanism 100, and a link member 210 that is rotatably mounted on the housing 10 by a bearing or the like, a roller 240 that is rotatably mounted on the link member 210, a link The plate 220 is mounted on the member 210 so as to be horizontally movable, and a second driving unit 230 that horizontally moves the plate 220.

  The link member 210 is connected to the first and second links 211 and 212, which are rotatably fixed to the housing 10 by center shafts 215 and 216 mounted on the side surfaces, and the first link 211 and the second link 212. Link 219. An extension link 213 is formed at one end of the connection link, and a roller 240 is rotatably mounted on the inner surface of the extension link 213.

  The roller 240 is located in the groove 112 formed in the first cam portion 110 of the cam mechanism 100. Accordingly, as the first cam portion 110 is rotated by the shaft 101, the roller 240 moves up and down by the difference in height between the top dead center T and the bottom dead center L of the groove 112 of the first cam portion 110 in the groove 112. After all, as a result, the link member 210 moves up and down in the directions opposite to each other on the left side and the right side (reference to FIG. 2) around the central axes 215 and 216.

  Linear guide grooves 211-1 and 212-1 extending along the longitudinal direction are formed on the inner surfaces of the first and second links 211 and 212 of the link member 210, respectively.

  A plate 220 having a predetermined area has first and second hinge shafts 221 and 222 attached to both end portions thereof. Both end portions of the second hinge shaft 222 attached to the second end portion are accommodated in guide grooves 211-1 and 212-1 formed on the inner surfaces of the first and second links 211 and 212 of the link member 210. ing. Both end portions of the first hinge shaft 221 mounted on the first end portion of the plate 220 are positioned in the guide grooves 11 respectively formed alongside the plate 220 on both inner surfaces of the housing 10.

  Both end portions of the first and second hinge shafts 221 and 222 attached to both end portions of the plate 220 are in the guide grooves 211-1, 212-1 and 11 formed in the link member 210 and the housing 10, respectively. For example, rollers 221-1, 221-2, 222-1, and 222-2 are mounted so that linear movement and rotational movement are possible. Therefore, the plate 220 can rotate (hinge) with respect to the link member 210 and the housing 10.

  The first end of the plate 220 is connected to the length adjusting unit. The length adjusting unit includes a second driving unit 230 mounted on the housing 10 and a driving shaft 232 of the second driving unit 230, and one end connected to the plate 220 (as shown in FIG. And a casing 231 (movably connected to the exposed first hinge shaft 221).

  A spiral portion is formed on the outer peripheral surface of the drive shaft 232 and the inner peripheral surface of the casing 231 (region where the drive shaft is inserted). Accordingly, the casing 231 moves toward the link member 210 or toward the second drive unit 230 by the action of the spiral portion as the drive shaft 232 rotates, and eventually the plate 220 is formed on the link member 210 and the housing 10. The guide grooves 211-1, 212-1 and 11 can be linearly moved.

<Power transmission unit 300>
As shown in FIG. 1, the power transmission unit 300 is disposed at the side of the cam mechanism 100 and below the vertical reciprocating drive unit 200.

  FIG. 3 is a view clearly showing the relationship between the cam mechanism 100, the power transmission unit 300 and the plunger unit 400 described later, and shows the detailed configuration of the power transmission unit 300 together.

  The power transmission unit 300 includes a shaft 310 rotatably mounted on the housing 10 via a bearing B, and a power transmission member 320 mounted (or formed) on the shaft 310. The power transmission member 320 is interlocked with the second cam portion 120 of the cam mechanism 100.

  The power transmission member 320 includes a disk-like plate through which the shaft 310 penetrates in the center, and first rollers 321A, 321B, 321C and second rollers 322A, 322B of a predetermined height that are rotatably fixed to the disk-like plate. 322C.

  The three first rollers 321A, 321B, 321C and the three second rollers 322A, 322B, 322C are alternately arranged, and the three first rollers 321A, 321B, 321C and the three second rollers 322A, 322B, 322C are Each has the same angular spacing.

  The first rollers 321A, 321B, 321C are larger in height than the second rollers 322A, 322B, 322C (for the sake of understanding, the second roller 322A having a low height in FIG. 3, which is a plan view). 322B and 322C are indicated by dotted lines). In such a structure, the first rollers 321 </ b> A, 321 </ b> B, 321 </ b> C correspond to the first disc plate 121 constituting the second cam portion 120 of the cam mechanism 100, and the second rollers 322 </ b> A, 322 </ b> B, 322 </ b> C are the cam mechanism 100. This corresponds to the second disc-shaped plate 122 constituting the second cam portion 120.

  The outer peripheral surfaces of the first rollers 321A, 321B, and 321C correspond to the outer peripheral surface of the first disc plate 121 of the second cam portion 120, and the outer peripheral surfaces of the second rollers 322A, 322B, and 322C are also the second cam portion 120. Corresponds to the second disk-shaped plate 122.

  The two protruding portions 121A and 121B formed on the outer peripheral surface of the first disc-shaped plate 121 of the second cam portion 120 can enter the space between the first rollers 321A, 321B, and 321C. Similarly, the two protrusions 122A and 122B formed on the outer peripheral surface of the second disc plate 122 of the second cam portion 120 can enter the space between the second rollers 322A, 322B and 322C.

  A power transmission process between the power transmission member 320 of the power transmission unit 300 having such a configuration and the second cam unit 120 of the cam mechanism 100 will be described with reference to FIGS. 1 and 3.

  When the shaft 101 of the cam mechanism 100 is rotated by the first drive unit 20, the first and second disk-shaped plates 121 and 122 of the second cam unit 120 are rotated. At this time, when the outer peripheral surfaces of the first and second disc-shaped plates 121, 122 correspond to the outer peripheral surfaces of the first rollers 321A, 321B, 321C and the second rollers 322A, 322B, 322C of the power transmission member 320, respectively. The power transmission member 320 does not rotate.

  One of the two projecting portions 121A and 121B formed on the first disc plate 121 (in a rotating state) of the second cam portion 120 constituting the cam mechanism 100 (for example, 121A). Enters the space between the two first rollers (for example, 321A and 321B), the power transmission member 320 rotates.

  After that, one of the two protrusions 122A and 122B (for example, 122A) formed on the second disc plate 122 (in a rotating state) of the second cam portion 120 that rotates subsequently. ) Enters the space between the two second rollers (eg, 322A, 322B), the power transmission member 320 continues to rotate.

  As the shaft 101 of the cam mechanism 100 rotates, the protrusion 122A formed on the first disc plate 121 (in a rotating state) of the second cam portion 120 is formed by the two first rollers 322A and 322B. The protruding portion 122A formed on the second disc plate 122 (in a rotating state) of the second cam portion 120 is removed from the space between the two second rollers 322A and 322B. Get out.

  In this state, the outer peripheral surfaces of the first rollers 321A, 321B, 321C correspond to the outer peripheral surface of the first disc plate 121 of the second cam portion 120, and the outer peripheral surfaces of the second rollers 322A, 322B, 322C are also the second cam. The power transmission member 320 does not rotate despite the rotation of the shaft 101 of the cam mechanism 100 because it corresponds to the outer peripheral surface of the second disc-shaped plate 122 of the portion 120.

  As the shaft 101 of the cam mechanism 100 rotates, the other protruding portion 121B formed on the first disc plate 121 (in a rotating state) of the second cam portion 120 is located between the two first rollers. When the other protrusion 122B formed on the second disc plate 122 of the second cam portion 120 that enters the space and subsequently rotates enters the space between the two second rollers, the power transmission member 320 is Rotate.

  Through such a process, the power transmission member 320 is repeatedly rotated and stopped.

  A first gear portion 323 is formed on the outer peripheral surface of the disk-shaped plate of the power transmission member 320.

<Plunger part 400>
The plunger unit 400 is disposed on the side of the power transmission unit 300 and below the vertical reciprocating drive unit 200.

  Plunger portion 400 includes a shaft 420 arranged to be vertically movable and rotatable in casing 410, a second gear portion 430 mounted (formed) on the outer peripheral surface of shaft 420, and a coupler 470 coupled to the lower end of shaft 420. , And a plunger 440 fixed to the lower end portion of the coupler 470.

  The second gear portion 430 mounted on the outer peripheral surface of the shaft 420 meshes with the first gear portion 323 of the power transmission unit 300, and a nozzle unit 500 described later is disposed at the lower end of the plunger 440.

  A separation member 460 that separates the space of the casing 410 is fixed to the lower end of the coupler 470, and the plunger 440 passes through the separation member 460. A spring 450 surrounding the plunger 440 is disposed in the lower space of the separation member 460.

  A flat spherical bearing 480 is provided at the upper end of the shaft 420. The plane portion of the plane spherical bearing 480 is in contact with the lower surface of the plate 220 of the vertical reciprocating drive unit 200, and the spherical portion is supported by a hemispherical concave surface 421 formed on the upper end surface of the shaft 420.

  As shown in FIGS. 6 to 9, a notch portion 411 is formed at the lower end portion of the plunger 440 with a side surface notched to a certain depth, width and length (height) (the function of the notch portion will be described later). To decide).

<Nozzle unit 500>
4 and 5 are views showing an operating state of the up-and-down reciprocating drive unit in the fluid ejection device according to the embodiment of the present invention, and are a state in which a part of the housing is removed for convenience.

  A nozzle unit 500 is disposed below the plunger unit 400 shown in FIGS. 4 and 5. 4 and 5 do not show the nozzle unit, and FIGS. 6 to 9 show the nozzle unit.

  The nozzle unit 500 includes a block 510 fixed to the lower end of the casing 410 of the plunger unit 400 and a nozzle 530 coupled to the lower end of the block 510. The block 510 includes an internal space (520 in FIG. 6) in which the plunger 440 of the plunger unit 400 is accommodated (with fluid), and an inflow port 521 and an exhaust port that are formed on both sides of the internal space 520 and communicate with the internal space 520. 522.

  The inlet port 521 is connected to an external fluid reservoir, and the outlet port 522 is connected to a nozzle 530 coupled to the lower end of the block 510.

  The overall operation and the function of each element of the fluid ejection device according to an embodiment of the present invention configured as described above will be described with reference to the drawings.

  4 is a view showing a state where the plunger of FIG. 1 is raised, and FIG. 5 is a view showing a state where the plunger of FIG. 1 is lowered. 6 to 9 are diagrams schematically showing the relationship between the plunger and the nozzle in the order of operation of the fluid ejection device according to the embodiment of the present invention.

  On the other hand, in the following description, terms related to directions such as “left side”, “right side”, “upper part”, and “lower part” are used on the basis of each drawing for convenience.

  In the state shown in FIG. 5, that is, in the state where the roller 240 fixed to the link member 210 of the vertical reciprocating drive unit 200 is positioned at the top dead center T in the groove 112 of the first cam unit 110 of the cam mechanism 100. The lower end of the plunger 440 is close to the bottom surface of the internal space 520 of the block 510 of the nozzle unit 500, and the notch 411 of the plunger 440 does not correspond to the inflow port 521 and the exhaust port 522 formed in the block (state of FIG. 9). ).

<Fluid inflow process>
The roller 240 attached to the link member 210 of the up-and-down reciprocating drive unit 200 along with the rotation of the first cam portion 110 due to the rotation of the shaft 101 of the cam mechanism 100 is lowered in the groove 112 of the first cam portion 110 of the cam mechanism 100. When the dead center L is reached, the right side portion (reference to FIG. 1) of the link member 210 moves downward (rotates) by the difference in height between the top dead center T and the bottom dead center L of the first cam portion 110, The left side portion (connected to the plate 220) about the central shafts 215 and 216 moves upward (rotates).

  At the same time, the plate 220 connected to the link member 210 also moves upward (rotates) about the second hinge shaft 222. Thus, when the plate 220 moves upward, the spring 450 compressed in the casing 410 of the plunger portion 400 by the plate 220 is restored, and the shaft 420 and the plunger 440 of the plunger portion 400 are raised by the restoring force of the spring 450. Move in the direction.

  On the other hand, the second cam portion 120 of the cam mechanism 100 rotates in the same manner as the first cam portion 110 while the above process is in progress. Here, the second gear portion 430 of the plunger portion 400 that maintains meshing state with the first gear portion 323 of the power transmission member 320 of the power transmission portion 300 selectively transmits the rotational force of the second cam portion 120. receive.

  That is, as already described regarding the structure and operation of the power transmission unit 300, the power transmission member 320 repeats rotation and stoppage depending on the structure of the second cam unit 120 of the cam mechanism 100 and the power transmission member 320 of the power transmission unit 300.

  Here, when the shaft 420 of the plunger unit 400 moves upward, it is desirable that the power transmission member 320 is in a stopped state, that is, the shaft 420 of the plunger unit 400 does not rotate.

  The notch 411 formed at the lower end of the plunger 440 by the ascent of the shaft 420 of the plunger 400 as described above corresponds to the inflow port 521 formed in the block 510 of the nozzle unit 500, and the fluid is The plunger 440 comes out of the direction movement and flows into the internal space 520 of the block 510 (the state shown in FIGS. 4 and 6).

  Thereafter, even if the first cam portion 110 of the cam mechanism 100 continues to rotate, the roller 240 attached to the link member 210 of the up-and-down reciprocating drive portion 200 causes the top dead center and the bottom dead center of the first cam portion 110 of the cam mechanism 100 to move downward. It is located in the groove 112 connecting the dead points. Therefore, the height of the link member 210 and the plate 220 does not change significantly.

  However, when the power transmission member 320 of the power transmission unit 300 rotates, the shaft 420 of the plunger unit 400 that receives the rotational force of the second cam unit 120 (continuously rotating) of the cam mechanism 100 rotates. Therefore, the notch part 411 formed in the plunger 440 of the plunger part 400 rotates toward the discharge port 522 formed in the block 510 of the nozzle unit 500 (state of FIG. 7).

<Fluid discharge process>
When the roller 240 of the link member 210 of the up-and-down reciprocating drive unit 200 reaches the top dead center T of the first cam unit 110 of the cam mechanism 100 as the first cam unit 110 of the cam mechanism 100 continues to rotate, the link member The right side portion of 210 (reference to FIG. 1) is moved upward (rotated) by the difference in height between the top dead center T and the bottom dead center L of the first cam portion 110, while the center shafts 215 and 216 are The left side of the center is moved downward (turned).

  The plate 220 connected to the link member 210 also moves downward (rotates) about the second hinge shaft 222. Due to the downward movement of the plate 220, the shaft 420 of the plunger part 400 that contacts the plate 220 is lowered, and at the same time, the spring 450 is compressed in the casing 410.

  While the above process proceeds, the second cam portion 120 of the cam mechanism 100 rotates in the same manner as the first cam portion 110. However, when the shaft 420 of the plunger portion 400 moves downward, the power transmission member 320 It is desirable that the shaft is stopped, that is, the shaft 420 of the plunger unit 400 does not rotate.

  The notch 411 formed at the lower end of the plunger 440 by the downward movement of the shaft 420 of the plunger 400 as described above corresponds to the discharge port 522 formed in the block 510 of the nozzle unit 500. At the same time, the fluid existing in the internal space 520 of the block 510 is pressurized by the plunger 440 that moves downward, flows to the nozzle 530 through the discharge port 522, and then is discharged to the outside (the state of FIGS. 5 and 8). .

  The fluid inflow process and the fluid discharge process as described above are repeated by the operation of the cam mechanism 100 by the continuous driving of the first driving unit 20, whereby the fluid is continuously discharged to the object.

  In order to prevent the plunger 440 from rotating when the plunger 440 of the plunger part 400 moves upward and downward, the roller 240 attached to the link member 210 of the up-and-down reciprocating drive part 200 is provided with the first cam of the cam mechanism 100. When entering the top dead center and bottom dead center of the portion 110, the first and second disc-shaped plates 121, 122 of the second cam portion 120 of the cam mechanism 100 are moved to the first and second rollers 321A, 321B, 322A, The protrusions 121A, 121B, 122B, 122B formed on the first and second disk-shaped plates 121, 122 must be arranged so as to correspond to the outer peripheral surface of 322B.

  Detailed functions of the fluid ejection device according to an embodiment of the present invention that operates as described above will be described with reference to the drawings.

  In the fluid ejection device according to the embodiment of the present invention, a planar spherical bearing 480 is attached to the upper end of the shaft 420 of the plunger unit 400 corresponding to the bottom surface of the plate 220 of the up-down reciprocating drive unit 200 as shown in FIG.

  The flat surface portion of the flat spherical bearing 480 is in contact with the lower surface of the plate 220 of the vertical reciprocating drive unit 200, and the spherical surface portion is supported by a hemispherical concave surface 421 formed on the upper end surface of the shaft 420.

  As described above, the plate 220 connected to the link member 210 of the vertical reciprocating drive unit 200 rotates upward and downward about the second hinge shaft 222, and the plate 220 maintains an inclined state in this process. . On the other hand, the shaft 420 of the plunger unit 400 that comes into contact with the plate 220 moves vertically and linearly.

  The shaft 420 of the plunger portion 400 that moves vertically linearly by the plane spherical bearing 480 and the plate 220 that performs the hinge motion can always maintain a surface contact state, and thus the rotational force (downward moving force) of the plate 220 is maintained in the plunger portion. 400 is accurately transmitted to the shaft 420.

  In the present invention, the amount of fluid flowing into the internal space 520 of the block 510 of the nozzle unit 500 is proportional to the vertical movement distance of the plunger 440 of the plunger unit 400. That is, the amount of fluid flowing into the internal space 520 of the block 510 of the nozzle unit 500 increases as the upward movement amount of the plunger 440 increases.

  The distance (D in FIG. 2) between the central axes 215 and 216 of the link member 210 and the center of the shaft 420 of the plunger portion 400 is always constant, and the left side portion of the link member 210 (the portion corresponding to the plate 220). Are always rotated up and down at the same angle, the amount of vertical movement of the plunger 440 is proportional to the tilt angle of the plate 220 during rotation. That is, the large inclination angle of the plate 220 means that the upward vertical movement amount of the shaft 420 of the plunger unit 400 that contacts the bottom surface of the plate 220 is large.

  Under the condition that the left side portion of the link member 210 always rotates up and down at the same angle, the longer the distance between the second hinge shaft 222 of the plate 220 and the center shafts 215 and 216 of the link member 210, the longer the rotation of the link member 210. The inclination angle of the plate 220 due to the movement is large.

  Accordingly, in order to increase the amount of fluid flowing into the internal space 520 of the block 510 of the nozzle unit 500, the distance between the second hinge shaft 222 of the plate 220 and the central shafts 215 and 216 of the link member 210 is increased. It is desirable. On the contrary, when the distance between the second hinge shaft 222 of the plate 220 and the central shafts 215 and 216 of the link member 210 increases, the amount of fluid flowing into the internal space 520 of the block 510 of the nozzle unit 500 increases.

  The amount of fluid ejected at one time must be adjusted according to the object from which the fluid is ejected. Therefore, in the present invention, a length adjustment unit that can adjust the position of the plate 220 with respect to the link member 210 of the vertical reciprocating drive unit 200 is adopted.

  When the second drive unit 230 constituting the length adjustment unit is operated to rotate the drive shaft 232 in the first direction, the spiral portions formed on the outer peripheral surface of the drive shaft 232 and the inner peripheral surface of the casing 231 are mutually connected. By the action, the plate 220 moves toward the link member 210 along the guide member 211-1, 212-1 and 11 formed in the link member 210 and the housing 10. Accordingly, the distance between the second hinge shaft 222 of the plate 220 and the central shafts 215 and 216 of the link member 210 is decreased, and the upward movement distance of the plunger 440 is decreased (that is, the fluid inflow amount is decreased).

  On the contrary, when the driving shaft 232 of the second driving unit 230 is rotated in the second direction, the plate 220 is moved along the guide members 211-1, 212-1 and 11 formed in the link member 210 and the housing 10 in the second direction. It moves toward the drive unit 230. As a result, the distance between the second hinge shaft 222 of the plate 220 and the central shafts 215 and 216 of the link member 210 increases, and the upward movement distance of the plunger 440 increases, thereby increasing the fluid inflow amount.

  Thus, in the present invention, the amount of fluid discharged by the length adjustment unit can be easily adjusted.

  On the other hand, in the plunger portion 400, a coupler 470 is attached to the lower end of the shaft 420, and the plunger 440 is fixed to the coupler 470. As described above, the fluid is supplied to the nozzle 530 through the notch 411 formed in the plunger 440. Therefore, when used for a long time, it is necessary to replace or clean the nozzle 530 and the plunger 440 formed with the fluid passage.

  When the plunger 440 is exchanged / cleaned, the exchange / cleaning process can be easily performed by replacing only the coupler 470 and replacing / cleaning the plunger 440 without exchanging the entire shaft 420 coupled / connected to other members. be able to.

  Although the present invention has been described with reference to exemplary embodiments, this is merely exemplary, and various modifications and equivalent embodiments are possible from those having ordinary skill in the art. You should be able to understand that.

  For example, in the above description, the power transmission member 320 includes three first rollers 321A, 321B, and 321C and three second rollers 322A, 322B, and 322C that are alternately arranged, and the second cam portion 120 of the cam mechanism 100 includes two Although the first and second disk-shaped plates 121 and 122 have been shown and described, only three first rollers 321A, 321B, and 321C are arranged on the power transmission member 320 under the same conditions. The second cam portion 120 may be composed of a single disk-like plate (for example, 121).

DESCRIPTION OF SYMBOLS 10: Housing 11: Guide groove 100: Cam mechanism 101: Shaft 110: 1st cam part 111: Main body 112: Groove 120: 2nd cam part 121: 1st disk shaped plate 121A, 121B: Protrusion part 122: 2nd Disc-shaped plates 122A and 122B: Protruding portion 200: Up and down reciprocating drive portion 210: Link member 211: First link 211-1: Guide groove 212: Second link 212-1: Guide groove 213: Extension link 220: Plate 221 : First hinge shaft 221-1, 221-2: Roller 222: Second hinge shaft 222-1, 222-2: Roller 230: Second drive unit 240: Roller 300: Power transmission unit 310: Shaft 320: Power transmission Member 321A, 321B, 321C: 1st roller 322A, 322 322C: second roller 323: first gear portion 400: plunger portion 410: casing 411: notch portion 420: shaft 421: hemispherical concave surface 430: second gear portion 440: plunger 450: spring 460: separating member 470: Coupler 480: Planar spherical bearing 500: Nozzle unit 510: Block 520: Internal space 521: Inflow port 522: Discharge port 530: Nozzle

Claims (13)

A cam mechanism including a shaft rotatably provided in the housing, and a first cam portion and a second cam portion rotatable with the shaft;
An up-and-down reciprocating drive unit disposed on one side of the cam mechanism and rotatable up and down in conjunction with the first cam unit;
A plunger portion configured to be vertically movable by rotation of the vertical reciprocating drive unit and configured to be rotatable by the second cam portion of the cam mechanism;
A nozzle unit that is disposed at a lower portion of the plunger portion, and inflow and discharge of fluid are performed by the vertical movement of the plunger portion, and a fluid inflow port and a discharge port are opened and closed by rotation of the plunger portion;
A cam type fluid discharge device. The first cam portion includes a cylindrical main body disposed on a shaft and a groove formed on an outer peripheral surface of the main body,
The groove includes a top dead center and a bottom dead center formed in regions corresponding to both ends of the diameter passing through the center of the cross section of the main body, and two curved portions that respectively connect the top dead center and the bottom dead center. Including
The said vertical reciprocating drive part contains the roller accommodated in the said groove | channel, and the said vertical reciprocating drive part repeats a downward rotation and an upward rotation with rotation of the said 1st cam part. Cam type fluid discharge device. The vertical reciprocating drive unit is
A link member mounted on the housing so as to be rotatable about a central axis and mounted with a roller housed in the groove of the first cam portion;
A second end portion is rotatably attached to the link member, and the first end portion includes a plate rotatably attached to the housing;
As the first cam portion rotates, the link member rotates around a central axis,
The cam-type fluid discharge device according to claim 2, wherein the plate is rotated about the second end portion by the rotation of the link member to move the plunger portion up and down. The link member is
First and second links respectively pivotally fixed to the housing by a central shaft mounted on a side surface;
A connecting link connecting the first link and the second link;
The cam-type fluid ejection device according to claim 3, further comprising an extension link extending from a tip of the connection link and having the roller mounted on an inner side surface thereof. The vertical reciprocating drive unit further includes a length adjusting unit that adjusts a position of the plate with respect to the link member,
The length adjusting unit includes a plate driving unit, and a casing in which a driving shaft of the plate driving unit is accommodated and one end is fixed to the plate,
The casing moves toward the link member or the plate driving portion with the driving of the driving shaft by the action of the spiral portion formed on the outer peripheral surface of the driving shaft and the inner peripheral surface of the casing,
Both end portions of the hinge shaft provided at the first end portion of the plate are movably located in guide grooves formed in the housing,
Both end portions of the hinge shaft provided at the second end portion are movably positioned in guide grooves formed on the first and second links of the link member, respectively.
The cam-type fluid discharge according to claim 4, wherein the link member moves along the guide groove of the housing and the guide groove of the first and second links by movement of the casing of the length adjusting unit. apparatus. The plunger part is
A shaft arranged vertically movable and rotatable in the casing;
A coupler coupled to the lower end of the shaft;
A separation member fixed to the lower end of the coupler of the plunger portion and separating the space of the casing;
A plunger that is fixed to a lower end of the coupler of the plunger portion and penetrates the separation member so that fluid flows in and out in the nozzle unit, and opens and closes the inflow port and the discharge port;
The cam-type fluid ejection device according to claim 1, further comprising: a spring disposed at a lower portion of the separation member so as to surround the plunger and returning the plunger moved downward. A flat spherical bearing is attached to the upper end of the shaft of the plunger part,
The plane portion of the plane spherical bearing is in contact with the lower surface of the plate of the up-down reciprocating drive unit,
The cam-type fluid ejection device according to claim 6, wherein the spherical portion of the planar spherical bearing is supported by a hemispherical concave surface formed on an upper end surface of the shaft of the plunger portion.   The lower end portion of the plunger is formed with a notch portion in which a side surface is notched to a certain depth, width and length (height), and fluid flows in and out in the nozzle unit through the notch portion, The cam type fluid discharge device according to claim 6, wherein the inflow port and the discharge port open and close. The nozzle unit includes a block installed at the lower end of the casing of the plunger portion and a nozzle coupled to the lower end of the block;
The block has an internal space in which the plunger of the plunger portion is accommodated,
The inflow port and the discharge port respectively communicating with the internal space of the block are formed on both sides of the internal space,
The cam-type fluid discharge device according to claim 7, wherein the inflow port is connected to an external fluid storage unit, and the discharge port is connected to the nozzle.   2. The power transmission unit according to claim 1, further comprising a power transmission unit that is disposed between the cam mechanism and the plunger unit and selectively transmits a rotational force of the second cam unit of the cam mechanism to the plunger of the plunger unit. Cam type fluid discharge device. The power transmission unit includes a shaft rotatably mounted on the housing, and a power transmission member mounted on the shaft of the power transmission unit and interlocked with the second cam unit of the cam mechanism,
The power transmission member includes a disc-shaped plate through which the shaft of the power transmission unit passes in a central portion, and a plurality of rollers rotatably fixed to the disc-shaped plate, and the rollers have the same angular interval. Have
The second cam portion includes a disk-like plate attached to the shaft of the housing and having an outer peripheral surface corresponding to an outer peripheral surface of the roller of the power transmission unit,
The disk-like plate includes a hemispherical protrusion that protrudes from the outer peripheral surface and can enter the space between the rollers of the power transmission member,
When the roller of the up-and-down reciprocating drive unit is positioned at the top dead center and the bottom dead center of the groove of the first cam unit, the outer peripheral surface of the disc-shaped plate of the second cam unit is the power transmission The cam type fluid discharge device according to claim 10, wherein the rotational force of the second cam portion is not transmitted to the plunger portion corresponding to the outer peripheral surface of the roller of the member. The power transmission unit includes a shaft rotatably mounted on the housing, and the power transmission member mounted on the shaft of the power transmission unit and interlocked with the second cam unit of the cam mechanism,
The power transmission member includes a disk-like plate through which the shaft of the power transmission part passes in a central part, and a number of first rollers and a number of second rollers respectively fixed to the disk-like plate so as to be rotatable. The rollers have the same angular spacing;
The second cam portion includes a first disc-like plate and a second disc-like plate mounted on the shaft of the housing with a predetermined interval,
The outer peripheral surface of the first disk-shaped plate corresponds to the outer peripheral surface of the first roller of the power transmission unit,
The outer peripheral surface of the second disk-shaped plate corresponds to the outer peripheral surface of the second roller of the power transmission unit,
Each of the disk-like plates includes a hemispherical protrusion that protrudes from the outer peripheral surface and can enter the space between the corresponding rollers of the power transmission member,
When the roller of the up-and-down reciprocating drive unit is positioned at the top dead center and the bottom dead center of the groove of the first cam unit, the outer peripheral surface of each disk-shaped plate of the second cam unit is the power The cam type fluid discharge device according to claim 10, wherein the rotational force of the second cam portion is not transmitted to the plunger portion corresponding to the outer peripheral surface of the corresponding roller of the transmission member. A gear portion is formed on the outer peripheral surface of the disk-shaped plate constituting the power transmission member of the power transmission portion,
The cam-type fluid discharge device according to claim 11 or 12, wherein a gear portion that meshes with the gear portion formed on the disk-like plate of the power transmission member is formed on an outer peripheral surface of the shaft of the plunger portion. .

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