JP3595809B2 - Nozzle dispensing device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a nozzle dispensing apparatus, and in particular, performs a dispensing operation, a clamp / unclamp of a nozzle unit, and a detachment of a tip by a slider that is moved up and down by one motor, thereby simplifying the structure and reducing the size. New improvements to achieve.
[0002]
[Prior art]
Conventionally, as this type of nozzle dispensing apparatus used, although not shown, an independent motor, a solenoid, and the like are provided for dispensing, nozzle detachment, and chip removal, respectively. (For example, Patent Documents 1 and 2)
[0003]
[Patent Document 1]
JP-A-8-229414
[Patent Document 2]
JP-A-9-281114
[Problems to be solved by the invention]
Since the conventional nozzle dispensing mechanism is configured as described above, the following problems exist.
In other words, since dedicated drive sources such as motors and solenoids are separately installed for dispensing, attaching and detaching nozzles, and removing tips, the market needs for a larger and more complex mechanism and a simpler and smaller market. It was extremely difficult to follow.
[0006]
The present invention has been made to solve the above problems, and in particular, performs a dispensing operation, a clamp / unclamp of a nozzle unit, and a detachment of a tip by a slider that is moved up and down by one motor. It is another object of the present invention to provide a nozzle dispensing apparatus which achieves simplification and downsizing of the structure.
[0007]
[Means for Solving the Problems]
A nozzle dispensing device according to the present invention includes a slider that moves up and down by a screw body that is rotated by a motor provided in a casing, a nozzle unit having a detachable tip that is detachably provided by a nozzle holder at a lower portion of the casing, A dispensing piston shaft provided on the slider for pushing the piston of the nozzle unit, a cam plate provided with the cam portion and capable of engaging with the slider and vertically movable on the casing, and A spring member for urging downward, a plurality of cams provided on the nozzle holder for clamping / unclamping the nozzle unit, and a cam follower engaging with the cam portion; A cam rotating body for causing the cam portion and the cam to move when the slider moves up to raise the cam plate. The cam rotating body is rotated via a follower, and each of the cams is rotated by the cam rotating body so that the clamp state of the cam with respect to the nozzle unit is released. A plurality of pins provided on the cams are inserted into pin holes formed in the respective cams, and the respective cams are rotatably supported by the nozzle holder, and the respective cams are circular. It is a configuration having a crescent shape formed by cutting out a part of the plate, and the engagement between the slider and the cam plate is performed outside the operating range of the slider for pushing the piston. A reciprocating rotator provided on the slider, a swing arm connected to the reciprocating rotator, a vertically movable shaft provided on the nozzle holder, and the nozzle holder A tip removal arm that is provided to engage with the tip, and the tip is pushed down by the tip removal arm via the swing arm and the shaft when the slider is lowered, thereby removing the tip from the nozzle unit. The reciprocating rotator includes a rotary solenoid, and the swing arm has a planar shape and a T-shape.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a nozzle dispensing device according to the present invention will be described with reference to the drawings.
1 to 4, a casing denoted by reference numeral 1 has a box-like overall shape, and a motor 2 is provided on an upper portion of the casing 1.
In the casing 1, a screw body 5 such as a trapezoidal screw or a ball screw connected to the rotating shaft 3 of the motor 1 via a coupling 4 is rotatably provided.
[0009]
A slider 6 is provided on the screw body 5 via a screw hole 6b so as to be movable up and down along the direction of arrow E. The slider 6 is provided on the casing 1 as shown in FIG. It is slidably connected to the linear guide 7, is configured to move up and down without rotating, and has a dispensing piston shaft 6A protruding downward.
[0010]
A long cam plate 10 is provided on the inner surface of the casing 1 via a plurality of guide projections 8 and 9 so as to be vertically movable. A cam portion 11 having a shape of a cam groove or a cam hole is formed.
The cam plate 10 is constantly urged downward by the other end of a spring member 13 such as a spring whose one end is connected to the upper end 12 thereof being locked by a locking portion 14 of the casing 1. , And can move up and down along the arrow E.
An operation position adjusting screw 16 is provided on a mounting piece 15 formed by bending integrally with the upper end 12 of the cam plate 10, and a lower end 16 a of the operation position adjusting screw 16 has an upper portion 6 a of the slider 6. And the slider 6 can lift the cam plate 10 upward against the spring force of the spring member 13.
[0011]
A nozzle holder 21 having a hollow shape and a flange 20 is provided at a lower portion 1a of the casing 1, and a hollow annular mounting base 22 is provided on the flange 20 (FIG. 7) of the nozzle holder 21. ing.
A through-hole 23 is formed in the nozzle holder 21 and the annular mounting base 22, and three (a number other than three) cams acting as clamp claws are formed around the hole 23 of the annular mounting base 22. 24 is provided rotatably via a shaft support 25.
[0012]
Each of the cams 24 has a crescent shape in which a part of a disk is cut out (not limited to the crescent shape, but other shapes are also possible). Along the outer peripheral shape of the nozzle head 31 of the nozzle unit 30 of FIG.
[0013]
A pin hole 32 is formed at a position near the shaft support portion 25 of each cam 24, and a hole is formed in each pin hole 32 on the lower surface of an annular cam rotating body 35 above each cam 24. The inserted pins 36 are inserted and engaged.
A roller-like cam follower 37 provided on a side portion of the cam rotating body 35 engages with the cam portion 11 having a cam lead formed of a long groove, a long hole, and the like of the cam plate 10, and the cam is moved when the cam plate 10 moves up and down. The rotating body 35 is configured to rotate in the direction of arrow F and alternately repeat the unclamped state A and the clamped state B in FIG.
[0014]
A replacement nozzle attachment 40 having a nozzle unit 30 is inserted and mounted in the hole 23 of the nozzle holder 21 from below, and the nozzle head 31 of the nozzle unit 30 passes through the hole 23 and When each cam 24 is rotated to the left as shown in FIG. 8B, each cam 24 is engaged with the clamp groove 41 at the lower portion of the head 31 to be in the clamp state B.
[0015]
The slider 6 is provided with a reciprocating rotator 50 composed of a rotary solenoid or the like. A swing arm 54 having a planar T-shape is provided on a rotating shaft 51 of the reciprocating rotator 50 via gears 52 and 53. The swing arm 54 is connected so that the swing arm 54 can reciprocate in the direction of arrow G by the operation of the reciprocating rotator 50.
[0016]
A holder 60 having a shaft 55 so as to be vertically movable is provided on a side portion of the nozzle holder 21. A spring 61 is provided between a retaining ring 61 a provided at an upper end of the shaft 55 and an upper surface 60 a of the holder 60. The shaft 55 is inserted, and is constantly urged upward with respect to the holder 60.
[0017]
A tip removing arm 70 having first and second bent portions 70a and 70b at both ends is mounted on a side portion of the nozzle replacement attachment 40 via a pair of mounting portions 71 and 72 so as to be vertically movable. The bent portion 70a can be in contact with the shaft 55, and the second bent portion 70b is located inside the replacement nozzle attachment 40 and outside the nozzle unit 30 as shown in FIG. It is engaged with the flange 73a of the removable cylinder 73 that can be removed.
[0018]
When the chip removing arm 70 is pushed down and the chip 75 attached to the lower part of the nozzle unit 30 is pushed down by the cylinder 73 for detaching, the chip 75 separates from the nozzle unit 30.
In addition, as shown in FIG. 4, the stroke of the above-described removal cylinder 73 is configured to be regulated by a step portion 80 formed on the inner wall of the replacement nozzle attachment 40.
[0019]
Next, the operation will be described. First, the replacement nozzle attachment 40 having the nozzle unit 30 is mounted on the nozzle holder 21, and the screw 2 is rotated by rotating the motor 2. 4 is pressed, and the liquid material in the nozzle unit 30 is discharged downward from the chip 75.
In the range of the stroke of the slider 6, the cam plate 10 is urged downward by the spring member 13 so that each cam 24 is in a clamped state, and the cam plate 10 does not rotate each cam 24. Therefore, the unclamping operation of the nozzle unit 30 is not performed.
[0020]
Next, when the tip 75 attached to the lower end of the nozzle holder 21 is removed and replaced with another tip 75, the reciprocating rotator 50 is operated to rotate the swing arm 54 as shown in FIG. When the slider 6 is continuously lowered after the position is set to be in contact with the upper portion 55a of the nozzle 55, the shaft 75 pushes down the removing cylinder 73 via the chip removing arm 70, so that the tip 75 Removed from the bottom and removed.
[0021]
Next, the nozzle unit 30 is removed from the nozzle holder 21 and, for example, in the case of replacement, the motor 2 is rotated in the above-described state, and the slider 6 is continuously raised. When the lower end 16a of the operating position adjusting screw 16 abuts and the slider 6 is further raised in this state, the cam plate 10 is pushed upward, and the cam follower 37 is engaged with the lower portion of the cam portion 11, so that the cam rotating body 35 7 rotates in the CCW direction in FIG. 7, changes from the clamp state B to the unclamped state A in FIG. 8, and the nozzle unit 30 is removed from the nozzle holder 21.
[0022]
In the above-described state, when the new nozzle holder 21 is mounted on the nozzle holder 21 together with the replacement nozzle attachment 40 and the slider 6 is lowered, the cam plate 10 is again urged downward by the spring member 13 and the cam rotating body 35 is moved. Rotating in the CW direction, each cam 24 returns from the unclamped state A of FIG. 8 to the clamped state B, and the nozzle unit 30 is clamped to the nozzle holder 21.
[0023]
【The invention's effect】
Since the nozzle dispensing device according to the present invention is configured as described above, the following effects can be obtained.
That is, the slider is moved up and down by using a driving source composed of one motor provided on the casing, dispensing operation of the nozzle unit, and a tip using a shaft and an arm using a swing arm provided with a reciprocating rotator provided on the slider. The nozzle unit can be clamped and unclamped by the detachment of the nozzle unit and the rotation of the cam due to the forcible pushing of the cam plate by the slider, so that the structure and the size of the nozzle unit can be greatly simplified and reduced in size compared to the related art. .
[Brief description of the drawings]
FIG. 1 is a front view showing a nozzle dispensing apparatus according to the present invention.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a sectional view taken along line BB of FIG. 2;
FIG. 4 is a sectional view taken along line CC of FIG. 1;
FIG. 5 is a sectional view taken along line DD of FIG. 4;
FIG. 6 is an exploded perspective view of a main part of FIG. 1;
FIG. 7 is an enlarged exploded perspective view of a main part of FIG. 1;
8 is an operation explanatory diagram showing an unclamped state and an unclamped state by each cam of FIG. 7;
FIG. 9 is a diagram illustrating a chip detachment operation of FIG. 2;
FIG. 10 is an enlarged exploded perspective view showing a main part of FIG. 9;
[Explanation of symbols]
Reference Signs List 1 casing 2 motor 5 screw body 6 slider 6A dispensing piston shaft 10 cam plate 11 cam portion 13 spring member 21 nozzle holder 24 cam 30 nozzle unit 30a piston 32 pin hole 35 cam rotating body 36 pin 37 cam follower 50 reciprocating rotation Device 54 swing arm 55 shaft 70 removal arm 75 chip

Claims (6)

A slider (6) that moves up and down by a screw body (5) that is rotated by a motor (2) provided in a casing (1), and is detachably provided at a lower portion of the casing (1) by a nozzle holder (21). A nozzle unit (30) having a free tip (75), a dispensing piston shaft (6A) provided on the slider (6) for pushing a piston (30a) of the nozzle unit (30), and the slider A cam plate (10), which can be engaged with (6) and is vertically movable on the casing (1) and has a cam portion (11); and a spring for constantly biasing the cam plate (10) downward. Engagement with the member (13), a plurality of cams (24) provided on the nozzle holder (21) for clamping / unclamping the nozzle unit (30), and the cam portion (11) Cam times a body (35) for rotating said cams (24) has that cam follower (37),
When the slider (6) rises to raise the cam plate (10), the cam rotating body (35) rotates via the cam portion (11) and the cam follower (37), and the cam rotating body (35). The cams (24) rotate to release the clamp state of the cams (24) on the nozzle unit (30). A plurality of pins (36) provided on the cam rotating body (35) are inserted into pin holes (32) formed in the respective cams (24), and the respective cams (24) are connected to the nozzle holder (21). 2. The nozzle dispensing device according to claim 1, wherein the nozzle dispensing device is rotatably supported at (1). 3. The nozzle dispensing device according to claim 1, wherein each of the cams has a crescent shape formed by cutting a part of a disk. 4. The engagement of the slider (6) with the cam plate (10) is performed outside the range of movement of the slider (6) for pushing the piston (30 a). 5. A nozzle dispensing device according to item 1. A reciprocating rotator (50) provided on the slider (6), a swing arm (54) connected to the reciprocating rotator (50), and a vertically movable unit provided on the nozzle holder (21). A shaft (55); and a tip removal arm (70) provided on the nozzle holder (21) and engaged with the tip (75). The swing arm (54) is moved downward by the slider (6). The tip (75) is detached from the nozzle unit (30) by depressing the tip (75) by the tip removal arm (70) via a shaft (55). The nozzle dispensing device according to any one of claims 1 to 4, wherein The nozzle dispensing device according to any one of claims 1 to 5, wherein the reciprocating rotator (50) comprises a rotary solenoid, and the swing arm (54) has a T-shape in plan view.

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