JPH09295395A - Feed discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a feed, discharge device of a cylindrical work used for a mechanism which performs a print like a screen process printing at the outer periphery of a cylindrical work. SOLUTION: In a printer which performs a print at the outer surface of a work 1 by holding sideways and rotating a cylindrical work 1 at a chuck means A, this device is provided with a feed side work pad 10 which supports a cylindrical work 1 and moves diagonally upward to said chuck means A and moves downward after deliverying the work 1 to the chuck means A, a discharge side work pad 18 which moves from a diagonal downward of the discharge side of the chuck means A diagonally upward to the chuck means A and returns back into place after receiving the work 1 and an interlock means which moves alternately vertically these work pads 10 and 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides printing such as screen printing on the outer circumference of a cylindrical container such as a plastic container as a liquid container for various beverages, liquid cosmetics, liquid detergents, liquid medical products, or glass bottles. The present invention relates to a cylindrical work supply / discharge device used in a printing machine.

[0002]

2. Description of the Related Art In a conventional semi-automatic printing machine for a cylindrical work, an operator manually inserts the work horizontally into an open chuck means, and then the chuck means is closed to hold the work. While rotating the work by the chuck means, the printing screen is brought closer from above, or conversely, the work is raised together with the chuck means to bring the screen into contact with the outer periphery of the cylindrical object,
While moving the screen while synchronizing with the peripheral speed of the outer periphery of the work, printing ink is applied by a spatula or a roller or the like on the screen to print desired characters or patterns on the outer periphery of the cylindrical object, and when the printing is finished. The screen and the work are separated, and at the same time, the chuck means is opened to separate the work, so that the worker takes out the work to the side.

In this conventional printing machine, the operator inserts the work into the chuck means by using both hands in a short time.
Take out.

[0004]

In the above-mentioned semi-automatic screen printing machine, it is necessary to insert and remove the work into and from the chuck means in a short time. Therefore, the timing of the insertion and the removal is difficult, and the supply is not completed in time, so that the blank supply is performed. Or the hand is delayed and the hand is caught between the work and the screen,
Problems such as scratching hands and screens often occurred.

Further, the chuck member of the chuck means is provided with an engaging portion for engaging with and disengaging from an engaging portion provided on the bottom of the work, and when the chuck member is pressure-bonded to the bottom of the work,
The two engaging portions are engaged with each other to prevent the bottom portion of the work and the chuck member from slipping.

For this reason, the bottom of the work needs to be oriented in a fixed direction in advance, but in the case of the conventional semi-automatic screen printing machine, an operator who inserts and removes the work positions the bottom of the work. Since there is no strap, a worker who positions the bottom of the work is separately arranged, and the work positioned by this worker is mounted on the chuck means.

Then, two workers are required, one for positioning the work and one for inserting / removing the work. Further, since the worker for attaching / detaching the work requires a very skilled person, a skilled worker is required. There was a problem that it was difficult to measure the cost because the labor cost soared without increasing the number of man-made.

[0008] Further, there are mass-production type full-automatic screen printers, but they are expensive and not suitable for introduction in the printing industry in which there are many Japanese-type high-mix types and small-volume production types. Currently, it depends on the printing machine.

Therefore, an object of the present invention is to solve the problems of the conventional semi-automatic screen printing machine as described above, so that even an unskilled person can easily insert and remove a work.

[0010]

In order to solve the above-mentioned problems, the present invention moves a cylindrical work, which is supplied obliquely downward on the supply side of a chuck means, obliquely upward toward the chuck means. After that, the operation of returning to the original position is repeated, and the operation of returning to the original discharging section after moving obliquely upward from the oblique lower side of the discharge side of the chuck means toward the chuck means A configuration is provided in which a discharge means is provided and an interlocking means for alternately moving up and down the supply means and the discharge means is provided.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The printing machine shown in FIGS. 1 and 2 showing the embodiment of the present invention is, similarly to the known one, a chuck that separates from the work 1 after the supplied cylindrical work 1 is horizontally held and rotated. It comprises a means A and a printing means B (only the screen 15 is shown and the others are not shown) for printing on the outer periphery of the work 1 held by the chuck means A.

As shown in FIG. 2, the chuck means A has a rotatable holder 4 which is moved forward and backward by a driving means 3 such as an air cylinder fixed to one side of the upper portion of the frame 2 and a bearing 5 on the opposite side of the frame 2. And a chuck member 7 fixed to the inner end of a drive shaft 6 which is rotatably held.

The holder 4 has a taper portion at its tip, and this taper portion engages with the mouth of the work 1. Further, a timing pulley 14 is fixed to the outer end of the drive shaft 6, The pulley 14 is driven by a timing belt.

Further, when the chuck member 7 is pressure-bonded to the bottom of the work 1, the inner end of the chuck member 7 is provided with an engagement portion that engages and disengages with the engagement portion provided on the bottom of the work 1. The engaging portion is engaged to prevent the bottom portion of the work 1 and the chuck member 7 from slipping.

The left side of FIG. 1 is the supply side, and in order to move the work 1 supplied by the supply section obliquely below it obliquely upward toward the chuck means A, an inclined guide rail 8 is provided on the frame 2. And a slide member 9 is attached to the guide rail 8 and a V-shaped workpiece receiver 10 is fixed to the slide member 9 to form a supply means C.

As shown in FIG. 4, the slide member 9 is detached from the rail 8 because the slider 12 having the convex portions 11 engaging with the grooves 13 provided on both sides of the guide rail 8 is fixed to the lower surface thereof. There is no fear.

Also on the discharge side on the right side of FIG. 1, a slanted guide rail 16 is arranged on the opposite side of the guide rail 8 and fixed to the frame 2, and a slide member 17 is mounted on this guide rail 16. The V-shaped work receiver 18 is fixed to the slide member 17 to form the discharging means D.

The slider 19 is also fixed to the lower surface of the slide member 17, and the protrusions on the inside are engaged with the grooves on both sides of the guide rail in the same manner as in FIG. 4, but a detailed view thereof is omitted.

Reference numeral 20 denotes an input shaft mounted rotatably below the frame 2, and the timing pulley 2 is attached to the input shaft 20.
2 is fixed and the input shaft 20 is continuously rotated in a fixed direction via a timing belt by a driving means (not shown).

A supply cam 21 and a take-out cam 31 are fixed to the input shaft 20 by an adjustable fixing means E.

FIG. 6 shows an example of the adjustable fixing means E of the cam 21. The inside of the boss 23 of the cam 21 has a tapered inner surface whose outer end has a large diameter. Is fitted with a circular ring 24 that can be expanded and reduced, and the tapered outer circumference of the collar 25 fixed to the input shaft 20 is fitted inside the circular ring 24, and is integrated with the outer end of the collar 25. A plurality of tightening bolts 27 rotatably inserted into a plurality of insertion holes of the provided flange 26 are screwed into a plurality of screw holes of the ring 24, and by tightening the bolts 27, the ring 24 is tapered to the outer peripheral surface of the collar 25. The outer circumference of the ring 24 by expanding along the boss 2
The cam 21 is fixed to an arbitrary position of the input shaft 20 by being crimped to the inner surface of the input shaft 3.

The adjustable fixing means E of the cam 31 with respect to the input shaft 20 has the same structure as in FIG. However, as the adjusting means for the cams 21 and 31 with respect to the input shaft 20, those having a structure other than the above structure can be arbitrarily adopted.

Further, a supply side drive shaft 32 and a discharge side drive shaft 33 are provided near the upper portions of both sides of the input shaft 20, and cam followers 36 at the tips of arms 34 and 35 fixed to the drive shafts 32 and 33 are provided. 37 is brought into contact with the outer circumference of the cams 21, 31.

Gears 38 and 39 are fixed to the drive shafts 32 and 33, respectively, and left and right arm shafts 41 and 42 are rotatably mounted on the frame 2 and located above the inner sides of the drive shafts 32 and 33. The gears 43 and 44 having a smaller diameter than the gears 38 and 39 are fixed and meshed with the gears 38 and 39, respectively, and the rotation angle of the reciprocating rotation of the shafts 32 and 33 is increased to increase the respective shafts 41 and 42. It is configured to be transmitted to.

Rollers 47 and 48 rotatably attached to the tips of arms 45 and 46 fixed to the arm shafts 41 and 42 respectively have grooves of convex portions 50 and 51 provided on the back surfaces of the slide members 9 and 17. The arms 45 and 46 are engaged with the arms 52 and 53 so that the swing of the arms 45 and 46 results in the reciprocating motion of the slide members 9 and 17.

To attach the arm 45 to the arm shaft 41, the boss 49 of the arm 45 is attached as shown in FIG.
It is fixed through the adjustable fixing means E similar to that shown in FIG. Then, a short arm 55 is fixed to the boss 49, and an air cylinder 56 is fixed to the arm 55 as shown in FIG.
The tip end of the piston rod 57 that is projected from is rotatably connected.

The rear end of the air cylinder 56 is rotatably connected to the frame 2, and the air pressure in the cylinder 56 is given a rotational force in the direction of the arrow in FIG. 3 via the piston rod 57 and the arm 55. , Gears 43, 3
The cam follower 3 at the tip of the arm 34
6 is pressed against the outside of the cam 21.

Although not shown in the drawings, an air cylinder having a similar structure is also provided to the arm shaft 42 to press the cam follower 37 at the tip of the arm 35 against the outside of the cam 31. The description is omitted because it is the same as the case of the cylinder 56.

However, instead of using such an air cylinder, the cam followers 36, 37 may be crimped to the cams 21, 31 using a spring or the like. If a groove cam is used, such an air cylinder or spring is used. There is no need to use it.

Although not shown, the mounting structure of the arm 46 on the arm shaft 42 is similar to the mounting structure of the arm 45 on the arm shaft 41.

In the case of the semi-automatic type, a work stand for pre-printing is provided on the supply side of the work, and in the case of the fully automatic type, the pre-printing works are individually introduced into the work tray at the lowered position. A supply device is installed, and an automatic work pick-up device after printing is also installed on the discharge side.

In the above embodiment, when the left and right work receivers 10 and 18 are in the lower standby positions as shown in FIG. 1, when the work 1 is supplied to the work receiver 10 manually or automatically, it is automatically or manually operated. When the switch is operated, the input shaft 20 starts to rotate, and by the action of the cams 21 and 31 which rotate with it, the arm 45 first starts to rotate upward, and the slide member 9 rises along the guide rail 8.

Thus, the work receiver 1 on which the work 1 is placed
The center of the work 1 on 0 rises as shown by the chain line in Fig. 1,
Under the condition that the chuck means A is concentric with the drive shaft 6 and stopped, the drive means 3 of FIG.
The work 1 is held by the chuck means A so that the work 1 is pushed and the bottom of the work 1 is pushed against the chuck member 7 of the drive shaft 6.

Under this condition, the slide member 9 starts descending by the action of the cam 21, and the work receiver 10 is separated from the work 1.
Next, the work 1 is rotated in a fixed direction by the timing belt hung on the timing pulley 14.

Under this condition, the screen 15 descends, comes into contact with the outer circumference of the work 1, and starts moving in the same direction at the same peripheral speed as the outer circumference of the work 1, during which time, similar to a known screen printing machine, Printing ink is applied from above the screen 15 with a spatula or the like, and when desired printing is performed, the screen 15 rises and separates from the work 1.

During the above printing operation, the slide member 17 starts to move up due to the operation of the cam 31, and the screen 15 moves to the work 1.
Under the condition that the workpiece receiving member 18 of the discharging means D is positioned to receive the workpiece 1, the drive shaft 6 stops rotating, and the driving means 3 operates to move the holder 4 away from the workpiece 1. Is placed on the work receiver 18 apart from the chuck means A, and at the same time, the slide member 17 starts descending to carry the work 1 to the lower discharge portion, where the work 1 is taken out manually or automatically.

During the above operation, the next work is started by positioning and placing the next work 1 on the work receiver 10 in the lowered position.

Although the above-mentioned operation shows an example in which the screen 15 descends, it is also possible that the screen 15 is at a constant height and the frame 2 moves up and down together with the entire mechanism.

In the above embodiment, the input shaft 20 is used for the cams 21, 31.
The arm 34, 35, 45,
Although a mechanism for swinging 46 or the like to raise and lower the work receivers 10 and 18 alternately has been shown, the slide members 9 and 1 may also be used.
The object of the present invention can be achieved even if a mechanism for alternately raising and lowering 7 by an air cylinder or a hydraulic cylinder is adopted, or a mechanism for raising and lowering the slide members 9, 17 by utilizing the rotation of a rack and pinion mechanism or a screw is adopted. To be

The timing is adjusted by the adjustable fixing means E by adjusting the positional relationship between the input shaft 20 and the cams 21, 31, and by adjusting the positional relationship between the arm shafts 41, 42 and the arms 45, 46.

[0042]

As described above, according to the present invention, since the cylindrical work, which is supplied obliquely below the supply side of the chuck means, is moved to the oblique upper part to print the work, the work is supplied below the printing unit. I'll do it. Therefore, there is no risk of the operator's hands touching the print part, there is no risk of injury or damage to the screen by the hands being caught between the screen and the work, and the work after printing is also below the print part. Since it is sufficient to take out the work, it is easy to take out the work after printing, and even an unskilled person can easily supply and take out the work.

Further, since the interlocking means is driven by the input shaft which is continuously rotated in a fixed direction by the driving means,
The structure is simple and the timing can be easily adjusted.

Further, it can be mounted on a known printing machine for automation.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view of an embodiment of the invention.

FIG. 2 is a side view of the chuck means.

FIG. 3 is an enlarged side view of the work supply means.

FIG. 4 is an enlarged cross-sectional view taken along the line II of FIG.

FIG. 5 is an enlarged transverse plan view of the input shaft portion.

FIG. 6 is an enlarged vertical sectional view of an adjustable fixing means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical work 2 Frame 3 Drive means 4 Holding tool 6 Drive shaft 7 Chuck member 8 Guide rail 9 Slide member 10 Work receiving 15 Screen 16 Guide rail 17 Slide member 18 Work receiving 20 Input shaft 21 Cam 31 Cam 32 Supply side drive shaft 33 Discharge Side Drive Shaft 41 Arm Shaft 42 Arm Shaft A Chuck Means B Printing Means C Supply Means D Ejection Means E Adjustable Fixing Means

Claims (2)

[Claims] 1. A printing method in which a supplied cylindrical work is held laterally and rotated, and thereafter chuck means is separated from the cylindrical work, and printing is performed on the outer circumference of the cylindrical work held by the chuck means. In the printing machine comprising the means, a supply means for repeating the operation of moving the cylindrical work, which is supplied obliquely downward on the supply side of the chuck means, obliquely upward toward the chuck means and then returning to the original position. And a discharging means that repeats the operation of returning from the discharging side of the chucking means obliquely upward toward the chucking means and then returning to the original discharging portion, and the supplying means and the discharging means are provided. A supply and discharge device, characterized in that it is provided with interlocking means for alternately moving up and down. 2. The interlocking means is an input shaft which is continuously rotated in a fixed direction by a drive means, and a supply side drive shaft which is located on both sides of the input shaft and which reciprocally rotates alternately in conjunction with the input shaft. 2. The supply and discharge device according to claim 1, further comprising: a discharge side drive shaft, and the ends of arms fixed to the drive shafts are connected to the supply means and the discharge means, respectively.