JP3648508B2 - Nozzle dispensing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a nozzle dispensing device, and in particular, uses a moving stroke of a slider that moves on a screw body driven by a single motor separately for dispensing and for chip removal, thereby simplifying and miniaturizing the structure. It relates to new improvements to achieve.
[0002]
[Prior art]
Conventionally, this type of nozzle dispensing device that has been used is provided with an independent motor, solenoid, etc. for dispensing, nozzle detachment and tip removal (not shown) (for example, Patent Documents 1 and 2).
[0003]
[Patent Document 1]
JP-A-8-229414 [Patent Document 2]
JP-A-9-281114 [0004]
[Problems to be solved by the invention]
Since the conventional nozzle dispensing mechanism is configured as described above, the following problems exist.
That is, dedicated drive sources such as motors and solenoids are installed independently for dispensing, nozzle removal, and tip removal, making the mechanism larger and more complex, and simplifying and miniaturizing market needs. It was extremely difficult to follow.
[0005]
The present invention has been made to solve the above-described problems, and in particular, the movement stroke of a slider that moves on a screw body driven by a single motor is separately used for dispensing and tip removal. Another object of the present invention is to provide a nozzle dispensing device that achieves simplification and miniaturization of the structure.
[0006]
[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 projecting portion that is provided on the slider and projects outward from an end of the casing, and the projecting member. A reciprocating rotator located on the outside of the casing, a swing arm provided on a rotating shaft of the reciprocating rotator, and a detachable chip detachably provided by a nozzle holder at the bottom of the casing A nozzle unit provided on the slider for pushing a piston of the nozzle unit, a holder provided on the nozzle holder and having a vertically movable shaft, and provided on the nozzle holder. A chip removal arm for removing the chip, and by the lowering of the slider due to the rotation of the screw body The dispensing piston shaft and the piston perform dispensing operation of the nozzle unit, the swing arm is rotated by the reciprocating rotator, and then the slider is further lowered than during the dispensing operation to move the swing. The tip is detached from the nozzle unit by the arm, the shaft, and the tip removal arm, and the movement stroke of the slider that moves on the screw body is the movement used for the dispensing operation. The strokes and the moving strokes used for removing the tips are configured separately, respectively, and the motor is composed of only a single unit and is used in common for the dispensing operation and the tip removing operation. In addition, the tip detaching arm is inserted into the nozzle holder and provided with an exchange node. On the side of Le attachment, a structure is provided vertically movably through the attachment portion.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a nozzle dispensing apparatus according to the present invention will be described with reference to the drawings.
In FIG. 1 to FIG. 4, a reference numeral 1 denotes a casing whose overall shape is a box shape, and one or a single motor 2 is provided on the upper portion of the casing 1.
In the casing 1, a screw body 5 comprising a trapezoidal screw or a ball screw connected to the rotating shaft 3 of the motor 2 via a coupling 4 is rotatably provided.
[0008]
A slider 6 is screwed to the screw body 5 through 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.
[0009]
A longitudinal cam plate 10 is provided on the inner surface of the casing 1 through a plurality of guide projections 8 and 9 so as to be movable up and down, and a longitudinal position having a predetermined lead in the lateral direction at the lower position of the cam plate 10. A cam portion 11 having a bent cam groove or cam hole shape is formed.
The cam plate 10 is constantly urged downward by the other end of a spring member 13 such as a spring having one end connected to the upper end 12 of the cam plate 10 being locked to the locking portion 14 of the casing 1. , And can be moved up and down along the arrow E.
An operating position adjusting screw 16 is provided on a mounting piece 15 formed by bending the cam plate 10 integrally with the upper end 12, and an upper portion 6 a of the slider 6 is provided at a lower end 16 a of the operating position adjusting screw 16. Are brought into contact with each other, and the cam plate 10 can be lifted upward against the spring force of the spring member 13 by the slider 6.
[0010]
A nozzle holder 21 having a hollow shape and a flange 20 is provided in the lower portion 1a of the casing 1, and a hollow ring-shaped 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 ring-shaped mounting base 22, and three (other than three) cams acting as clamping claws are formed around the hole 23 of the ring-shaped mounting base 22. 24 is rotatably provided via a shaft support portion 25.
[0011]
Each of the cams 24 has a crescent shape (not limited to a crescent shape but may be other shapes) in which a part of the disk is cut out. This is along the outer peripheral shape of the nozzle head 31 of the nozzle unit 30.
[0012]
A pin hole 32 is formed in the vicinity of the shaft support portion 25 of each cam 24, and is formed in the lower surface of a cam rotating body 35 that forms a ring shape above each cam 24 in each pin hole 32. Each pin 36 is inserted and engaged.
A roller-shaped cam follower 37 provided on a side portion of the cam rotating body 35 is engaged with the cam portion 11 having a cam lead including a long groove, a long hole, and the like of the cam plate 10, and the cam plate 10 is moved up and down. The rotating body 35 rotates in the direction of the arrow F, and the unclamped state A and the clamped state B of FIG. FIG. 8 shows a state viewed from the back side of the nozzle head 31, that is, from the clamping groove 41 side.
[0013]
An exchange 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 is located above each cam 24. 8, by rotating the cams 24 to the left as shown in FIG.
[0014]
A reciprocating rotator 50 made of a rotary solenoid or the like is provided on the projecting portion 6 </ b> C extending integrally from the slider 6 and projecting to the outside of the casing 1, and a gear 52 is provided on a rotating shaft 51 of the reciprocating rotator 50. , 53 is connected to a swing arm 54 having a T-shape in a planar shape, and the swing arm 54 is configured to be reciprocally rotated along the direction of arrow G by the operation of the reciprocating rotator 50. ing.
[0015]
A holder 60 having a shaft 55 that can move up and down is provided on the side of the nozzle holder 21, and a spring 61 is provided between a retaining ring 61 a provided at the upper end of the shaft 55 and an upper surface 60 a of the holder 60. The shaft 55 is constantly urged upward with respect to the holder 60.
[0016]
At the side of the replacement nozzle attachment 40, a chip removal arm 70 having first and second bent portions 70 a and 70 b at both ends in the longitudinal direction is movable up and down via a pair of pin-like attachment portions 71 and 72. The first bent portion 70a can be brought into contact with the shaft 55, and the second bent portion 70b is located outside the nozzle unit 30 inside the replacement nozzle attachment 40 as shown in FIG. It engages with a flange 73a of a removal cylinder 73 that can move up and down only by a predetermined stroke. Although not shown, the mounting portions 71 and 72 are configured to engage with a pair of elongated holes of the chip removal arm 70 and move up and down.
[0017]
When the tip detaching arm 73 pushes down the tip 75 attached to the lower portion of the nozzle unit 30 by pushing down the tip detaching arm 70 downward, the tip 75 is detached from the nozzle unit 30 and detached. .
In addition, the stroke of the above-mentioned removal cylinder 73 is configured to be regulated by a stepped portion 80 formed on the inner wall of the replacement nozzle attachment 40 as shown in FIG.
[0018]
Next, the operation will be described. First, when the replacement nozzle attachment 40 having the nozzle unit 30 is mounted on the nozzle holder 21 and the motor 2 is rotated to rotate the screw body 5, the dispensing piston shaft 6 </ b> A is lowered together with the slider 6 to move into the nozzle unit 30. The piston 30a (FIG. 4) is pressed, and the liquid material in the nozzle unit 30 is discharged downward from the tip 75.
In the stroke range for pushing the piston 30a of the slider 6, the cam plate 10 is biased downward by the spring member 13 so that each cam 24 is in a clamped state. Therefore, the unclamping operation of the nozzle unit 30 is not performed.
[0019]
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 lowered following the above-described dispensing operation after setting the positional relationship in contact with the upper portion 55a of the 55, the shaft 55 pushes down the removal cylinder 73 via the tip removal arm 70. 75 is removed from the lower portion of the nozzle unit 30 and removed. The moving stroke of the slider 6 by the moving operation on the screw body 5 is composed of a stroke for removing the tip following the stroke required for the above-described dispensing, and the stroke for dispensing and the tip removing is respectively different, that is, a heavy stroke. They are independent of each other.
[0020]
Next, when the nozzle unit 30 is removed from the nozzle holder 21 and replaced, for example, when the motor 2 is rotated in the above-described state and the slider 6 is continuously raised, the cam plate 10 is placed on the upper portion 6 a of the slider 6. The lower end 16a of the operation position adjusting screw 16 comes into contact, and when the slider 6 is still 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 is engaged. 7 rotates in the CCW direction in FIG. 7 and changes from the clamped state B of FIG. 8 to the unclamped state A, and the nozzle unit 30 is removed from the nozzle holder 21.
[0021]
When the new nozzle holder 21 is mounted on the nozzle holder 21 together with the replacement nozzle attachment 40 in the state described above 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. Therefore, the stroke operation of the slider 6 used for the above-described dispensing operation and chip removal operation is performed by only the single motor 2 and the overall shape of the apparatus is configured compactly. In the present invention, the case where the clamp mechanism of the nozzle unit 30 is used has been described. However, it can be fixed or detachable only by fitting without using the clamp mechanism.
[0022]
【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 using a drive source consisting of only one motor provided in the casing, and the nozzle unit is dispensed, and the shaft and the arm using the swing arm by the reciprocating rotator provided on the slider. The chip can be removed, and the simplification and downsizing of the structure can be greatly achieved as compared with the prior art. In addition, the dispensing operation and the chip removal operation can be performed with different strokes on the moving stroke in which one slider moves, and only a single screw body is required, so that downsizing of the apparatus can be achieved.
[Brief description of the drawings]
FIG. 1 is a front view showing a nozzle dispensing device according to the present invention.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
3 is a cross-sectional view taken along the line BB in FIG.
4 is a cross-sectional view taken along the line CC of FIG.
5 is a cross-sectional view taken along the line DD of FIG.
6 is an exploded perspective view of the main part of FIG. 1. FIG.
7 is an enlarged exploded perspective view of a main part of FIG. 1. FIG.
8 is an operation explanatory view showing an unclamped and clamped state by each cam of FIG. 7;
9 is a diagram of the chip removal operation of FIG. 2. FIG.
10 is an enlarged exploded perspective view showing a main part of FIG. 9. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing 2 Motor 5 Screw body 6 Slider 6A Dispensing piston shaft 10 Cam plate 11 Cam part 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 54 Swing arm 55 Shaft 70 Tip removal arm 75 Tip

Claims (4)

A slider (6) that moves up and down by a screw body (5) rotated by a motor (2) provided in the casing (1), and an end (1a) of the casing (1) provided in the slider (6). A projecting portion (6C) projecting to the outside, a reciprocating rotator (50) provided on the projecting portion (6C) and positioned outside the casing (1), and a reciprocating rotator (50) A swing arm (54) provided on a rotating shaft (51), and a nozzle unit (30) having a detachable tip (75) provided detachably by a nozzle holder (21) at a lower portion of the casing (1). A dispensing piston shaft (6A) provided on the slider (6) for pushing the piston (30a) of the nozzle unit (30), and a vertically movable shaft (55 provided on the nozzle holder (21)). ) And a tip removal arm (70) provided on the nozzle holder (21) for removing the tip (75). When the slider (6) is lowered by the rotation of the body (5), the dispensing piston shaft (6A) and the piston (30a) perform the dispensing operation of the nozzle unit (30), and the reciprocating rotator (50 ), The slider (6) is further lowered than during the dispensing operation, and the swing arm (54), the shaft (55), and the tip removal arm ( 70) A nozzle dispensing device configured to remove the tip (75) from the nozzle unit (30) by 70). The moving stroke of the slider (6) moving on the screw body (5) is different from each other in the moving stroke used for the dispensing operation and the moving stroke used for removing the tip (75). The nozzle dispensing device according to claim 1. The nozzle dispensing apparatus according to claim 1 or 2, wherein the motor (2) comprises only a single unit and is used in common for the dispensing operation and the chip removal operation. The tip detaching arm (70) is provided on the side of the replacement nozzle attachment (40) provided by being inserted into the nozzle holder (21) so as to be movable up and down via attachment portions (71, 72). The nozzle dispensing device according to any one of claims 1 to 3, wherein the nozzle dispensing device is provided.

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