JP6205570B2 - Dispensing device - Google Patents

Description

  The present invention relates to a dispensing device including a chip removal device.

  Generally, a dispensing apparatus includes a mounting nozzle aligned vertically and horizontally and a chip removal device for removing a chip mounted on the mounting nozzle at a time.

  The inside of the mounting nozzle is a cylinder chamber having a piston, and when the piston rises, a sample or the like is sucked into a chip mounted on the mounting nozzle. Further, as the piston descends, the sample in the suctioned tip is dispensed into each hole of the sample plate at once.

  On the other hand, the outline of the chip removal device is that the tip dropping member is kept waiting at the tip dropping standby position above the tip mounting area of the mounting nozzle, and the tip dropping member in the tip dropping standby position is mounted after dispensing is completed. By forcibly lowering the tip to the tip drop position below the nozzle by the driving means, the tip is dropped from the attached nozzle at a time and removed (see, for example, Patent Document 1).

JP 2012-141205 A

  The tip removal device of the dispensing device has each removal through-hole that can move up and down from the tip drop standby position above the nozzle to the tip drop position below the nozzle for each mounting nozzle.

  The through hole is formed larger than the nozzle diameter of the mounting nozzle and smaller than the outer diameter of the opening flange portion of the chip. Therefore, when the through-hole at the tip drop standby position descends along the mounting nozzle, it comes into contact with the opening flange portion of the tip mounted below, thereby providing a means for dropping the tip from the lower end of the nozzle.

  Accordingly, the through-hole of the chip removal device is formed to have a hole diameter corresponding to the mounting nozzle and the chip mounted on the mounting nozzle. For example, a small amount for a suction / dispensing amount of 1 to 30 μl is used. A large chip for 30 to 300 μl with respect to the chip cannot be used because the diameter of the through hole is different, and is a chip removal device dedicated to each chip.

  For this reason, for example, there is a problem that it is not possible to cope with a mounting nozzle of a plurality of mounting types that is developed so that a large chip can be selected and mounted below one mounting nozzle and a small chip can be selected and mounted.

  Therefore, in the present invention, even with a multiple mounting type mounting nozzle that can be mounted by selecting a large chip above one mounting nozzle and a small chip below it, each chip can be mounted without any problem. An object of the present invention is to provide a dispensing device including a tip removing device that can be dropped and removed at a time.

  In order to achieve the above object, one aspect of the dispensing apparatus of the present invention is arranged vertically and horizontally, and has an upper large tip mounting portion with a large diameter formed in the first cylinder chamber and an inner portion in the first cylinder chamber. A chip mounting nozzle formed in the two-cylinder chamber and having a small chip mounting portion having a small diameter in the vertical direction; and a first and second cylinder chamber that are inserted in the first and second cylinder chambers so as to be movable up and down. The first and second cylinder pistons can pass from the small tip mounting portion below each tip mounting nozzle to the upper large tip mounting portion and have a smaller diameter than the opening flange portion of the large tip mounted on the large tip mounting portion. The first nozzle through hole is continuous with the first nozzle through hole, passes through the small chip mounting portion below the chip mounting nozzle, is blocked at the lower end of the upper large chip mounting portion, and is mounted on the small chip mounting portion. The tip dropping member having the second nozzle through hole having a smaller diameter than the opening flange portion of the small tip and the centers of the first and second nozzle through holes of the tip dropping member are respectively positioned at the centers of the tip mounting nozzles. The dropping member positioning means and the tip dropping member are always attached to the large chip fall standby position above the insertion allowance above the insertion allowance where the large chip is attached, beyond the small chip fall standby position above the insertion allowance where the small chip is attached. And a one-step lowering control for lowering the chip dropping member at the large chip drop standby position against the dropping member biasing means to a large chip removal position that is disengaged from the lower end of the large chip mounting portion. And the chip dropping member in the small chip dropping standby position is lowered against the dropping member urging means to the small chip removing position that is off the lower end of the small chip mounting portion. Characterized in that it includes a drop member elevation control means capable bunk down control.

  In order to achieve the above object, another aspect of the dispensing apparatus of the present invention includes a large tip mounting nozzle that is aligned vertically and horizontally and has an inside formed in a cylinder chamber, and each of the large tip mounting nozzles. A piston nozzle that is inserted into the cylinder chamber so as to be movable up and down, and has a lower end that protrudes through the cylinder chamber and serves as a small tip mounting nozzle, and can be moved up and down independently within the cylinder chamber formed inside the piston nozzle. An inserted piston, a tip dropping member constantly biased by a biasing means to a large tip drop standby position above a large tip insertion allowance attached to the large tip mounting nozzle, and a large tip fall standby position A drop member lowering control means for lowering a tip dropping member against the biasing means to a large tip removal position that is disengaged from the lower end of the large tip mounting nozzle; The stone nozzle has a suction / dispensing stroke that moves up and down in the cylinder chamber of the nozzle with the large tip, a lowering stroke that projects the small tip mounting nozzle downward from the cylinder chamber beyond the suction / dispensing stroke, and a small tip. The small chip mounted on the mounting nozzle is controlled to be a small chip removal ascending stroke in which the small chip mounted on the mounting nozzle is brought into contact with the lower end of the large chip mounting nozzle and dropped.

  According to the present invention, even if it is a multiple mounting type mounting nozzle that can be mounted by selecting a large chip above one mounting nozzle and a small chip below it, each chip can be dropped at once without any trouble. Thus, it is possible to provide a dispensing device including a chip removing device that can be removed.

It is a front view which shows the dispensing apparatus which concerns on 1st Embodiment. It is a principal part enlarged view of the dispensing apparatus of 1st Embodiment. It is a side cross-sectional enlarged view of the dispensing head which comprises the dispensing apparatus of 1st Embodiment (state with the large chip | tip mounted | worn). It is a side cross-sectional enlarged view of the dispensing head which comprises the dispensing apparatus of 1st Embodiment (state with the small chip | tip mounted | worn). It is a typical top view explaining the structure of the chip | tip dropping member which comprises the dispensing apparatus of 1st Embodiment. (A) is a side cross-sectional enlarged view (state with a large tip attached) of the dispensing head constituting the dispensing device of the second embodiment, and (b) is a sectional view taken along the line AA in (a). It is. It is a side cross-sectional enlarged view of the dispensing head which comprises the dispensing apparatus of 2nd Embodiment. (Small chip is attached). It is a side section expanded view of the dispensing head which constitutes the dispensing device of a 2nd embodiment (state where a small chip falls).

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, the same or similar components as those already described are denoted by the same or similar reference numerals, and detailed description thereof is omitted as appropriate.

  In addition, it should be noted that the drawings are schematic and the dimensional ratios and the like are different from actual ones. Therefore, specific dimensional ratios and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

  The following embodiments are exemplifications for embodying the technical idea of the present invention, and the embodiments of the present invention are described below in terms of the material, shape, structure, arrangement, etc. of the components. It is not something specific. The embodiments of the present invention can be implemented with various modifications without departing from the scope of the invention.

[First Embodiment]
A first embodiment will be described. As shown in FIGS. 1 to 4, the dispensing device 10 according to the present embodiment has a head frame 14 supported by a main body support frame 12. A dispensing head 16 is supported on both ends of the head frame 14 (one is not shown). The dispensing head 16 is provided with tip mounting nozzles 18 protruding slightly on the lower surface side, aligned vertically and horizontally. Each tip mounting nozzle 18 of the dispensing head 16 includes a vertically and horizontally aligned piston 20 that is inserted from above to be movable up and down.

  A large-sized chip (hereinafter referred to as a large chip) BT and a small-sized chip (hereinafter referred to as a small chip) ST as shown in FIG. 4 are attached to and detached from each chip mounting nozzle 18 of the dispensing head 16. It is configured to be freely attached.

  In addition, the dispensing apparatus 10 includes a support table 19. A large number of chips (large chips or small chips) to be mounted on the above-described chip mounting nozzle 18 are arranged on the support table 19 in the vertical and horizontal directions. The chip case (chip rack) 17a to be arranged and set can be exchanged. The vertical / horizontal distance between the chip on the chip case 17a and the chip is set in accordance with the vertical / horizontal distance of each chip mounting nozzle 18 described above. In addition to the above-described chip case 17a, the support table 19 has a reagent tray 17b for aspirating the reagent and a sample plate 17c in which the holes for dispensing the aspirated reagent are arranged vertically and horizontally. Etc. can be arranged interchangeably.

  The dispensing device 10 is positioned with positioning moving means for positioning the body support frame 12 directly above the tip case 17a, reagent tray 17b, and sample plate 17c by horizontally moving the main body support frame 12 along the guide rail GL. The control case 36 is provided with a drive mechanism for a head frame elevating mechanism (none of which is shown) that moves the head frame 14 up and down at each position.

  Therefore, for example, after positioning directly above the chip case 17a, each chip mounting nozzle 18 is lowered together with a piston lifting / lowering drive unit 21 (see FIG. 3), which will be described later, to thereby insert the chip on the chip case 17a. For example, the fitting attachment with the large chip BT becomes possible. Further, by replacing the chip case 17a in which the small chip ST is set, the fitting with the small chip ST becomes possible.

  The drive unit 21 has a motor M that can be rotated forward and backward, and a screw rod 21a that is driven and controlled by the motor M. The piston rod 20a is provided with a piston support in which pistons 20 are arranged vertically and horizontally. The frame 21b is screwed. Accordingly, the piston 20 can be moved up and down via the piston support frame 21b by forward and reverse rotation of the screw rod 21a.

  Furthermore, the dispensing apparatus 10 includes a tip dropping member 30 that drops the large tip BT and the small tip ST attached to the tip attaching nozzle 18 from the tip attaching nozzle 18, and a dropping member that constantly biases the tip dropping member 30 upward. A compression coil spring 46 serving as an urging unit, and a drop member raising / lowering control unit 50 for controlling the raising / lowering position of the chip dropping member 30 are provided.

(Piston and tip mounting nozzle)
As shown in FIGS. 3 and 4, the piston 20 is a combination of an upper rod portion 20 u (first cylinder piston) having a large diameter and a lower rod portion 20 v (second cylinder piston) having a small diameter. Thus, it can be controlled to move up and down along the central axis.

  The tip mounting nozzle 18 is screw-engaged with the dispensing head 16 at the top and has a large tip mounting portion 18u having a portion to which the large tip BT is mounted on the outer peripheral side, and screw-engaged with the large tip mounting portion 18u from below. A small chip mounting portion 18v having a portion where the small chip ST is mounted on the outer peripheral side.

  A first cylinder chamber 22u having a large diameter into which the upper rod portion 20u is inserted is formed in the large tip mounting portion 18u, and a diameter in which the lower rod portion 20v is inserted into the small tip mounting portion 18v. A small second cylinder chamber 22v is formed.

  A recess for accommodating the sealing O-ring 23u is formed on the inner periphery of the upper portion of the large chip mounting portion 18u. The dispensing head 16 has a ring contact portion 16p that contacts the O-ring 23u from above. The ring contact portion 16p also serves as a stopper that regulates the upper position of the large tip mounting portion 18u. With this configuration, the large tip mounting portion 18u is screw-engaged with the dispensing head 16 so that the large tip mounting portion 18u presses and seals the O-ring 23u.

  Further, a recess for accommodating the sealing O-ring 23v is formed on the lower inner peripheral side of the large chip mounting portion 18u, and the small chip mounting portion 18v is screw-engaged with the large chip mounting portion 18u. Thus, the small chip mounting portion 18v presses and seals the O-ring 23v. The O-rings 23u and 23v can be X-rings that can form an oil sump.

  The first cylinder chamber 22u can be sucked and dispensed in an amount of 30 to 300 μl by the up / down stroke of the upper rod portion 20u. Further, the second cylinder chamber 22v can be sucked and dispensed in an amount of 1 to 30 μl by the lifting stroke of the lower rod portion 20v.

  A through hole 18uh for communicating the first cylinder chamber 22u having a large diameter with the outside of the nozzle is formed below the large tip mounting portion 18u. With respect to the number and dimensions of the through holes 18uh, when the piston 20 is moved up and down with the large tip BT mounted according to the inner diameters of the first cylinder chamber 22u and the second cylinder chamber 22v, suction and dispensing from the nozzle tip. It is set to the number and size that can be performed smoothly.

  Thus, since the outer periphery of the tip mounting nozzle 18 has a two-step upper and lower shape, when the large tip BT is mounted, the inside of the large tip BT and the inside of the first cylinder chamber 22u are defined by the through hole 18uh. The upper rod portion 20u moves up and down to allow suction / dispensing from the tip end. When the small tip ST is mounted, the inside of the small tip ST and the second cylinder chamber 22v communicate with each other. In addition, suction and dispensing from the tip end are possible by the vertical movement of the lower rod portion 20v.

(Chip drop member related)
The chip dropping member 30 is configured to be able to pass from a small chip mounting part below each chip mounting nozzle to an upper large chip mounting part. The chip dropping member 30 has a first nozzle through hole 30a and a second nozzle through hole 30b continuous with the first nozzle through hole 30a corresponding to each chip mounting nozzle 18 (see FIG. 5). Both the first nozzle through hole 30a and the second nozzle through hole 30b are circular.

  In the present embodiment, the continuous position of the second nozzle through hole 30b with respect to the first nozzle through hole 30a is a position on the rearward side of the dispensing device 10. And the 2nd nozzle through-hole 30b is following the 1st nozzle through-hole 30a with the opening width used as the maximum diameter of the 2nd nozzle through-hole 30b.

  The first nozzle through hole 30a has a smaller diameter than the opening flange portion BTF of the large tip BT attached to the large tip attachment portion 18u. The second nozzle through hole 30b can pass through the small chip mounting portion 18v (that is, has a larger diameter than the small chip mounting portion 18v), and is prevented from moving upward at the lower end of the large chip mounting portion. In addition, the diameter is smaller than the opening flange portion STF of the small chip ST mounted on the small chip mounting portion 18v.

  The tip dropping member 30 has guide member through holes 30c (see FIG. 5) on the left and right (one is omitted), and a guide member 32 extending downward from the dispensing head 16 passes therethrough. The guide member through-hole 30c is a guide hole that guides the chip dropping member 30 to a solid line and a two-dot chain line by a dropping member positioning unit, which will be described later, and is formed in a long and narrow elongated shape in the front-rear direction.

  The dropping member positioning means includes a male screw 38 that is screwed into a side wall of the chip dropping member 30 on the apparatus rear side, and a male screw motor 40 that can be rotated forward and backward to rotate the male screw 38. The centers of the first nozzle through hole 30a and the second nozzle through hole 30b of the chip dropping member 30 are positioned at the center of the chip mounting nozzle 18 by the rotation of the male screw 38, respectively.

  Further, the guide member 32 described above includes a compression coil spring 46. The lower end portion of the compression coil spring 46 is supported by being in contact with the lower end portion of the guide member 32, and the upper end portion of the compression coil spring 46 is inserted into the ring-shaped contact member 49 slidably inserted into the guide member 32 from below. It is in contact. With this configuration, the compression coil spring 46 causes the chip dropping member 30 to drop over the chip allowance above the insertion allowance for attaching the large chip BT over the small chip fall standby position above the insert allowance for attaching the small chip ST. It is always energized to the standby position.

  In addition, the dispensing device 10 includes, as the drop member raising / lowering control means 50, a crank-shaped cam member 52 that ensures a large control stroke, and a forward / reverse-rotating cam that rotates the cam member 52 about a horizontal axis. And a member motor 54.

  With these configurations, the one-step lowering control for lowering the chip dropping member 30 located at the large chip dropping standby position against the compression coil spring 46 to the large chip removing position removed from the lower end of the large chip mounting portion 18u, Two-step lowering control is possible in which the chip dropping member 30 located at the chip drop standby position is lowered against the compression coil spring 46 to the small chip removal position that is detached from the lower end of the small chip mounting portion 18v.

(Function, effect)
Hereinafter, the operation and effect of the present embodiment will be described.

(Attaching and dispensing tips)
When a large tip BT is used in the dispensing device 10, the large tip BT is set as the tip mounting nozzle 18 in the tip case 17 a, the tip case 17 a is installed on the support table 19, and the dispensing head 16 is pushed down. As a result, as shown in FIG. 3, the upper rod portion 20u is inserted into the large tip BT, and the large tip BT is attached to the upper rod portion 20u. At this time, the lower rod portion 20v is located in the accommodation space inside the large chip BT.

  In order to aspirate the sample into the large chip BT, the piston 20 and the dispensing head 16 are moved above the sample (solution) to be aspirated, and the piston 20 and the dispensing head 16 are moved down to move the tip of the large chip BT. Intrude into the specimen. Then, the piston 20 is raised by the drive unit 21. As a result, the air in the large chip BT is sucked into the first cylinder chamber 22u of the upper rod portion 20u from the through hole 18uh, whereby the specimen is sucked into the large chip BT that has become negative pressure.

  Thereafter, the piston 20 and the dispensing head 16 are moved to the specimen discharge position, and the piston 20 is lowered. As a result, the air in the first cylinder chamber 22u is pushed out from the through hole 18uh into the large tip BT, so that the specimen is pushed out from the tip of the large tip BT that has become positive pressure.

  When the small tip ST is used in the dispensing apparatus 10, the small tip ST is set in the tip case 17 a as the tip mounting nozzle 18, the tip case 17 a is installed on the support table 19, and the dispensing head 16 is pushed down. As a result, as shown in FIG. 4, the lower rod portion 20v is inserted into the small tip ST, and the small tip ST is attached to the lower rod portion 20v.

  In order to suck the sample into the small chip ST, the piston 20 and the dispensing head 16 are moved above the sample (solution) to be sucked, and the piston 20 and the dispensing head 16 are moved down to move the tip of the small chip ST. Intrude into the specimen. Then, the piston 20 is raised by the drive unit 21. As a result, the air in the small tip ST is sucked into the second cylinder chamber 22v from the lower end of the lower rod portion 20v, that is, the lower end opening 22vm of the second cylinder chamber 22v, so that the negative pressure inside the small tip ST becomes negative. The sample is aspirated.

  Thereafter, the piston 20 and the dispensing head 16 are moved to the specimen discharge position, and the piston 20 is lowered. As a result, the air in the second cylinder chamber 22v is pushed into the small chip ST from the opening 22vm, so that the specimen is pushed out from the tip of the small chip ST that has become positive pressure.

  Thus, in the dispensing apparatus 10 of this embodiment, since it is possible to mount two types of chips, the large chip BT and the small chip ST, by using one type of chip mounting nozzle 18, the amount can be reduced from 1 μl to a small amount. It is possible to accurately aspirate and dispense up to 300 μl.

  The lower rod portion 20v of the piston 20 has a structure that moves together in an integral shape with the upper rod portion 20u. However, as a means that penetrates the upper rod portion 20u vertically and can move up and down independently. Also good. As a result, for example, when one of the upper rod portion 20u and the lower rod portion 20v is operated, the other rod portion is always in a resting state, so that it is very preferable in terms of durability. Become.

(Tip removal)
In order to remove the large tip BT and the small tip ST from the tip mounting nozzle 18 after dispensing, the dispensing head 16 is first moved to the tip mounting / collecting position.

  In this case, for example, when the large chip BT mounted on the chip mounting nozzle 18 is removed, the cam dropping motor 30 in the standby position (solid line in FIG. 3) is removed by rotating the cam member motor 54. Lower to the position (chain line in FIG. 3) (one-step lowering control). As a result, the opening flange portion BTF of each large chip BT is pressed downward by the chip dropping member 30 and falls off the large chip mounting portion 18u.

  Next, for example, when removing the small chip ST mounted on the chip mounting nozzle 18, the cam member motor 54 is rotated and lowered to the large chip removal position (position for the one-step lowering control), and the cam member is moved. The rotation of the motor 54 is stopped. Then, the male screw motor 40 is rotated to move the tip dropping member 30 downward (arrow) as shown by a chain line in FIG. 5 so that the center position of the second nozzle through hole 30b is aligned with the center position of the tip mounting nozzle 18. .

  At this time, since the chip dropping member 30 is in the standby position as shown by a solid line in FIG. 4, for example, the cam member motor 54 is further rotated so that the chip dropping member 30 is removed from the small chip (chain line in FIG. 4). (2 step down control). As a result, the opening flange portion STF of each small chip ST is pressed downward by the chip dropping member 30 and falls off the small chip mounting portion 18v.

  As described above, in the dispensing device 10 of the present embodiment, even when the tip mounted on the tip mounting nozzle 18 is a large tip BT or a small tip ST, the tip dropping member 30 surely and easily. The tip can be removed.

[Second Embodiment]
The dispensing device according to the second embodiment shows a form in which a large chip and a small chip are dropped by a combination of vertical movement of a chip dropping member and a chip mounting nozzle.

  As shown in FIGS. 6 to 8, the dispensing device 60 of this embodiment includes a dispensing head 66 and a tip mounting nozzle 68.

  The tip mounting nozzle 68 includes a large tip mounting nozzle 68u on which a large tip BT having a large diameter can be mounted on the outside, and a piston nozzle on which a small tip ST having a diameter smaller than that of the large tip BT can be mounted on the lower end (tip portion). 68p. With this configuration, the lower end portion of the piston nozzle 68p is a small chip mounting nozzle 68v.

  A through hole is formed in the large tip mounting nozzle 68u along the central axis, and the inside of the through hole is a first cylinder chamber 72b. The piston nozzle 68p is inserted through the first cylinder chamber 72b, and the outer periphery of the piston nozzle 68p serves as the piston side wall, and the relationship between the piston and the cylinder that contacts the side wall (cylinder inner wall) of the first cylinder chamber 72b is ensured. ing. Further, the tip mounting nozzle 68 includes an upper end member 68e in which the upper end portion of the piston nozzle 68p is screwed from below.

  The dispensing device 60 includes a piston support frame 71b instead of the piston support frame 21b, and a piston nozzle fixing member 70 between the piston support frame 71b and the dispensing head 66. The piston nozzle 68p is formed with a through hole along its central axis, and the inside of the through hole is a second cylinder chamber 72s. The piston support frame 71b is provided with a piston 74 that extends downward and is inserted through the upper end member 68e to move up and down in the second cylinder chamber 72s. Therefore, the piston 74 can move up and down independently of the piston nozzle 68p.

  The dispensing device 60 includes a fixed member vertical movement mechanism 80 that moves the piston nozzle fixing member 70 up and down. The upper end member 68e of the tip mounting nozzle 68 is fixed by being inserted from below into the opening 70m of the piston nozzle fixing member 70, and the piston nozzle 68p is moved up and down by the piston nozzle fixing member 70 moving up and down. It is structured to move forward and backward with respect to 68u.

  The fixing member up-and-down moving mechanism 80 includes a support member 82 formed in a lateral U-shape that sandwiches left and right peripheral portions (one not shown) of the piston nozzle fixing member 70 from above and below, A screw rod 84 that extends in the direction and is screwed into and through the support member 82, a screw rod motor 86 that rotates (forward and reverse) the screw rod 84, and a guide rail that guides the support member 82 in the vertical direction. And a guide member 88. The support member 82 has a pair of left and right arm-shaped guided portions 82g. The guided portion 82g is slidably engaged with the guide groove 88a of the guide member 88, and the screw rod 84 is rotated forward and backward. Vertical movement is possible. Thereby, independent piston movement (up-and-down movement) of the piston nozzle 68p becomes possible through the support member 82 and the piston nozzle fixing member 70.

  The dispensing device 60 includes a tip dropping member 90, and the tip dropping member 90 is constantly compressed to a large tip drop standby position above the insertion allowance of the large tip BT attached to the large tip attachment nozzle 68u. The coil spring 96 is biased. The tip dropping member 90 is formed with a round hole-shaped nozzle through hole 30d having a diameter slightly larger than the nozzle diameter of the large tip mounting nozzle 68u.

  Further, the dispensing device 60 includes a head frame 94, a guide member 92, and a compression member respectively corresponding to the head frame 14, the guide member 32, the compression coil spring 46, the cam member 52, and the cam member motor 54 described in the first embodiment. A coil spring 96, a cam member 102, and a cam member motor 104 are provided. Further, the chip dropping member 30 in the large chip dropping standby position is provided with a dropping member lowering control means 100 for lowering the chip dropping member 30 against the compression coil spring 96 to the large chip removing position that is disengaged from the lower end of the large chip mounting nozzle 68u. It has become.

  With these configurations, the piston nozzle 68p moves upward and downward in the first cylinder chamber 72b of the large tip mounting nozzle 68u, and lowers from the first cylinder chamber 72b beyond the suction and dispensing stroke. And a lower stroke for projecting the small chip mounting nozzle 68v, and a small chip removal rising stroke that causes the small chip ST mounted on the small chip mounting nozzle 68v to come into contact with the lower end of the large chip mounting nozzle 68u and drop. The cam member motor 104, the screw rod motor 86, and the motor M are controlled by normal rotation and reverse rotation.

  Hereinafter, the operation and effect of the present embodiment will be described. In order to mount the large tip BT with the dispensing device 60, the fixing member vertical movement mechanism 80 raises the piston nozzle fixing member 70 so that the small tip mounting nozzle 68v is accommodated in the large tip mounting nozzle 68u. Similar to the embodiment, the large tip BT set in the tip case is mounted on the large tip mounting nozzle 68u by lowering the dispensing head 66 (see FIG. 6). Even if the small chip mounting nozzle 68v is not completely accommodated in the large chip mounting nozzle 68u, the small chip mounting nozzle 68v is raised with respect to the large chip mounting nozzle 68u to the extent that the large chip BT mounting is not hindered. Then, the large chip BT may be mounted.

  In order to mount the small tip ST with the dispensing device 60, the piston nozzle fixing member 70 is lowered by the fixing member vertical movement mechanism 80, and the small tip mounting nozzle 68v of the piston nozzle 68p is moved from the large tip mounting nozzle 68u. Project to the position. Then, by lowering the dispensing head 66, the small chip mounting nozzle 68v is inserted into the small chip ST set in the chip case to mount the small chip ST (see FIG. 7).

  On the other hand, in order to remove the large chip BT and the small chip ST from the chip mounting nozzle 68 after the dispensing is completed, first, the dispensing head 66 is moved to the chip mounting / collecting position.

  In this case, for example, when the large chip BT mounted on the chip mounting nozzle 68 is removed, the cam member motor 104 is rotated to drop the chip at the standby position in FIG. 6 as in the first embodiment. The member 90 is lowered to the position where the large chip is removed (one-step lowering control; chain line in FIG. 6). As a result, the opening flange portion BTF of each large chip BT is pressed by the chip dropping member 90 and moves downward, and falls off the large chip mounting nozzle 68u.

  Next, for example, when removing the small chip ST mounted on the chip mounting nozzle 68, the small chip mounting nozzle 68v is raised with respect to the large chip mounting nozzle 68u by raising the piston nozzle fixing member 70. . As a result, as shown by the chain line in FIG. 8, the small chip ST is detached and dropped when the opening flange STF of the small chip ST comes into contact with the lower end portion of the large chip mounting nozzle 68u (see FIG. 8).

  Thus, according to the second embodiment, when the chip mounted on the chip mounting nozzle 68 is a large chip BT, all the large chips BT are moved by moving the chip dropping member 90 downward. Can be removed. In the case of the small chip ST, all the small chips ST can be removed by raising the small chip mounting nozzle 68v with respect to the large chip mounting nozzle 68u.

10 Dispensing device 18 Tip mounting nozzle 18u Large tip mounting portion 18v Small tip mounting portion 20 Piston 20u Upper rod portion (first cylinder piston)
20v Lower rod part (second cylinder piston)
22u First cylinder chamber 22v Second cylinder chamber 30 Tip dropping member 30a First nozzle through hole 30b Second nozzle through hole 30d Nozzle through hole 46 Compression coil spring (falling member biasing means)
50 Dropping member lifting control means 60 Dispensing device 68 Tip mounting nozzle 68u Large tip mounting nozzle 68p Piston nozzle 68v Small tip mounting nozzle 72b First cylinder chamber 72s Second cylinder chamber 90 Tip dropping member 96 Compression coil spring (dropping member biasing means )
100 Dropping member lowering control means BT Large tip ST Small tip BTF Opening flange STF Opening flange

Claims (2)

An upper large tip mounting portion with a large diameter formed inside the first cylinder chamber and a small tip mounting portion with a small diameter formed inside the second cylinder chamber are arranged vertically in the vertical and horizontal directions. A tip mounting nozzle,
A first cylinder piston and a second cylinder piston, which are inserted into the first and second cylinder chambers so as to be movable up and down, and are continuous in the vertical direction;
A first nozzle through hole and a first nozzle having a smaller diameter than the opening flange portion of the large chip mounted on the large chip mounting portion can pass from the small chip mounting portion below each chip mounting nozzle to the upper large chip mounting portion. Continuing from the through hole, passing through the small chip mounting part below the chip mounting nozzle and being blocked by the lower end of the upper large chip mounting part, the diameter is smaller than the opening flange part of the small chip mounted on the small chip mounting part. A chip dropping member having two nozzle through holes;
Dropping member positioning means for positioning the centers of the first and second nozzle through holes of the chip dropping member at the centers of the chip mounting nozzles;
Drop member urging that constantly urges the chip dropping member to a large chip fall standby position above the insertion allowance where the large chip is mounted, beyond the small chip fall standby position above the insertion allowance where the small chip is mounted Means,
One-step lowering control for lowering the chip dropping member at the large chip dropping standby position to the large chip removing position that is disengaged from the lower end of the large chip mounting portion against the dropping member urging means and the chip at the small chip falling standby position And a falling member lifting / lowering control means capable of two-step lowering control for lowering the falling member against the dropping member urging means to a small chip removal position that is disengaged from the lower end of the small chip mounting portion. Dispensing device. A large tip mounting nozzle that is arranged vertically and horizontally, the inside of which is formed in a cylinder chamber;
A piston nozzle that is inserted into the cylinder chamber of each of the large tip mounting nozzles so as to be movable up and down, and whose lower end projecting through the cylinder chamber is a small tip mounting nozzle;
A piston that is inserted into a cylinder chamber formed inside the piston nozzle independently of being vertically movable;
A tip dropping member that is constantly biased by a biasing means to a large tip drop standby position above an insertion allowance of the large tip attached to the large tip mounting nozzle;
A dropping member lowering control means for lowering the tip dropping member in the large tip dropping standby position against the biasing means to a large tip removing position that is disengaged from the lower end of the large tip mounting nozzle;
The piston nozzle includes a suction / dispensing stroke that moves up and down in the cylinder chamber of the large tip mounting nozzle, a lowering stroke that projects the small tip mounting nozzle downward from the cylinder chamber beyond the suction / dispensing stroke, A dispensing apparatus, characterized in that the small chip mounted on the chip mounting nozzle is controlled by a small chip removal and rising stroke that causes the small chip mounted on the chip mounting nozzle to come into contact with the lower end of the large chip mounting nozzle and drop.