JPS6243946Y2 - - Google Patents

Description

[Detailed description of the invention] This invention examines the color tone of printing on a can body with undried printing ink that is supported by a can body support pin attached to the chain of a pin conveyor and is moving upward at high speed. The present invention relates to a device for taking out the pins from the pin conveyor.

BACKGROUND OF THE INVENTION Printing machines for applying printing ink to the outer surface of a can body with a one-piece bottom, and devices for removing the printed can body from the printing machine and transporting it to a drying and baking oven by means of a pin conveyor are known.

The outline is shown in Figure 1.

In the figure, P is a printing machine, 1 is a can body guide frame, 2 is a can body conveying device that receives can bodies from the guide frame 1, and can body A
is the lower end 3 of the guide frame 1 and the rotating disk 4 of the conveying device 2.
(The direction of rotation is indicated by arrow a) is inserted into the can support tube 5 and moves forward. 10 is an ink transfer device of the printing machine P, which transfers ink of a desired color into a desired pattern from an ink mixing roll group 11 to a coating plate 12.
transcribed into. Reference numeral 13 denotes a coating roll having a desired number of coating plates 12 (eight in the example shown) on its outer periphery, which rotates in the direction of arrow b to roll the coating plate 1 onto which the ink has been transferred.
2 comes into pressure contact with the advancing can body A in the printing ink transfer section 6, and ink is transferred to the outer surface of the can body body.

The can body to which the ink has been transferred advances further and is moved by the can body transfer device 16 rotating in the direction of arrow C.
It is pulled out from the can body support cylinder 5 at the point indicated by 7 and
The pin 1 is transferred to the can support pin 19 of the pin conveyor 18, which is moving downward (arrow d).
While being supported by 9, it is transferred in the direction of arrow e, and reaches a baking oven (not shown). Currently, this can body printing is normally done at a speed of over 600 cans per minute (at this time, the chain speed of the pin conveyor is approximately 80 m/min).
minutes).

By the way, when a printing press is operated continuously, the viscosity of the ink transferred to the can body gradually increases, and
The color tends to be darker. Therefore, it becomes necessary to take out the printed can body (sample can) and inspect the color tone. In that case, if the number of cans printed per minute is small and the speed of the pin conveyor (can body advancement speed) is not slow, the can body can be picked up from the pin conveyor with a magnet held in the hand and taken out for inspection. Although it is possible to visually inspect the can bodies on the support pins, such a method is not possible when operating at a high speed of 600 cans per minute as mentioned above.

The purpose of the present invention is to solve the above-mentioned problems.According to this, the pin is placed facing the can body support pin of the rising pin conveyor, and at a distance of more than the length of the can body from the tip of the can body support pin. A flat belt conveyor comprising a rising portion that advances parallel to and in the same direction as the conveyor, and a horizontal portion extending in a direction opposite to the pin conveyor side via an arcuate portion following the rising portion; and at least the rising portion of the flat belt conveyor. a can body attracting device that is fixedly installed over a portion, a circular arc portion, and a horizontal portion close to the circular arc portion, and that attracts can bodies to the flat belt conveyor; a pressurized air outlet that blows out pressurized air toward an ascending portion of the conveyor; a can body detection device that detects can bodies advancing on the horizontal portion of the flat belt conveyor; , a drive device that drives at the same speed as the pin conveyor when the pressurized air is ejected, and switches to a lower speed than the above speed based on a signal from the can body detection device. A sample can take-out device is obtained.

Hereinafter, an example of the present invention will be explained with reference to the drawings.

FIG. 2 is an explanatory view of the apparatus of this example, and FIG. 3 is a cross-sectional view taken along the line -- in FIG.

In Fig. 2, 18 is a pin conveyor;
As in FIG. 1, numerals 9 are can support pins mounted on the conveyor at appropriate pitches. However, this conveyor 18 is in a position further forward than the first illustrated location and is rising upward (arrow f).

Reference numeral 30 denotes a flat belt conveyor of the device for taking out the sample cans from the pin conveyor 18, which faces the can body support pin 19 and is separated from the tip 20 of the can body support pin 19 by more than the length l of the can body. an ascending portion 31 that advances in parallel, at the same speed, and in the same direction;
A horizontal portion 34 extends from the upper end 32 of the rising portion through an arcuate portion 33 in a direction opposite to the pin conveyor side. However, if, for example, the position of the horizontal portion 34 is high and it is difficult to take out the can body at this horizontal portion 34, as shown in the second figure, a circular arc portion 35 pointing downward from the horizontal portion 34 and the circular arc portion 3
5 may be followed by a vertically downwardly descending portion 36.

38 is an inverted U-shaped frame body, and the flat belt 37 of the conveyor 30 travels along the outer surface of this frame body. As shown in FIG. 3, this frame body 38 includes an outer frame 51 having a substantially C-shaped cross section, and an inner frame 5 within the outer frame 51.
4 with bolts 52, 52', and is disposed across the ascending portion 31, arcuate portion 33 and horizontal portion 34 of the conveyor 30, and the end portion 39 close to the arcuate portion 33. Although a permanent magnet was used in the example, an electromagnet, a vacuum suction device, etc. may also be used. The rising belt portion of the flat belt 37 moves in contact with the outer plate 56 of the inner frame 54, and the can body is attracted to the flat belt 37 by the suction force of the attracting device 53. In addition, in FIG. 3, it is separated from the outer frame 51 and the frame body 38
The flat belt 37 shown without touching the
is the belt part on the descending side. Furthermore, if the flat belt conveyor 30 is also provided with another circular arc portion 35 and a descending portion 36 as shown in the second figure, the can body attracting device is attached to these portions and the other end 39' of the horizontal portion 34. It can also be provided across the board.

Reference numeral 40 denotes a variable speed motor fixedly installed in the vicinity of an appropriate location on the outer frame 51 of the frame body 38, and its rotation is controlled by the belt 41.
is transmitted to the pulley 42 by the flat belt 37.
is driven by a pulley 43 coaxial with this pulley 42. The flat belt 37 is tensioned by means of a suitably provided tensioning pulley 45. 44 is an idle pulley located at the other end of the frame 38.

Reference numeral 60 denotes a detection device for detecting the can bodies traveling together with the flat belt 37 on the horizontal portion 34 of the conveyor 30, and in this example, a photoelectric device is used. However, proximity switches, electromagnetic devices, etc. can also be used. This device receives as many cans (8 in this example) on a flat belt 37 as at least corresponding to the number of applicator plates 12 (FIG. 1) of the applicator roll, and then transfers the can bodies on the horizontal portion 34. It is installed at a position to detect the can body ahead.

The operation of this example device is as follows.

First, the motor 40 is rotated at a predetermined rotation speed, and the flat belt 37 is driven at the same speed as the chain of the pin conveyor 18. Next, pressurized air is injected from the slit-shaped pressurized air outlet 70 into the can of the bottomed can body A supported by the can body support pin 19, and the can body is directed toward the opposing rising flat belt 37. blow off.
The can bodies are attracted to the flat belt 37 by being blown away by pressurized air and pulled by the pulling device 53 of the flat belt conveyor 30, and are raised together with the flat belt 37 with the can bottom in contact with the flat belt. The movement of the can bodies from the pin conveyor to the flat belt is reliably carried out because both conveyors move in parallel at the same speed and in the same direction. Also, the tip 2 of the can support pin
0 and the flat belt 37 in the rising portion is equal to or longer than the can body length l, the can body support pins will not become an obstacle to the movement of the can body.

The can bodies being raised by the pin conveyor are successively transferred from the can body support pin onto the flat belt 37 by the number of coating plates 12 of the coating roll in this example, that is, eight can bodies. The number of cans transferred is determined by the duration of the pressurized air jet, which is set on a timer.

Once the can bodies have been brought to the end 39 of the horizontal section by the pulling device 53, they travel along the rest of the horizontal section 34 with the flat belt 37, and the first can body that is traveling is moved by the photoelectric device 60. When it reaches the front, a photoelectric device detects this and sends a signal to the motor 40.
This signal reduces the rotational speed of the motor 40, and the flat belt 37 becomes slow. Of course, in this case, the rotation of the motor 40 may be stopped once and then rotated at a low speed. When this temporary stop is performed, the progress of the flat belt is also temporarily stopped, but if this is sudden, there is a risk that the can body on the horizontal portion may fall. In such a case, appropriate preventive measures should be taken, such as installing a pulling device along the entire length of the horizontal portion.

By slowing the motor speed, the can bodies move more slowly, making it easier to remove them from the belt and to visually inspect them. If for some reason inspection at the horizontal portion 34 is difficult, the can bodies may be advanced at a slower speed to the descending portion 36, as previously described and shown in FIG. 2, where they can be removed and inspected.

Note that since there are a plurality of coating plates in the coating roll, even if a defective can body is discovered, if it is not clear which coating plate is responsible for the defect, all the coating plates must be investigated. In order to avoid this kind of difficulty, it is possible to easily deal with this by predetermining the coating plate on which the first can to be taken out will be printed when consecutively taking out the number of printed cans corresponding to the number of coating plates. This means that it is possible to detect the coated plate. To do this, for example, an electric signal device may be set so that the time when the pressurized air starts to be ejected coincides with the time when the can body printed with the specific application plate of the application roll passes.

In addition to the electric device that determines the pressurized air injection start timing, a known mechanism can be used for the electric device that stops the motor in response to a signal from the can body detection device, the variable speed motor, and the like.

As described above, when using the device of the present invention, the flat belt in the ascending section moves in parallel with the pin conveyor, in the same direction, and at the same speed, so cans can be reliably received from the can support pins, and the desired number of cans can be received. After receiving the
Since the speed of the flat belt is made low, it is easy to take out the can bodies from the flat belt and visually inspect them.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the main parts of a conventional printing machine and printed can transport device, Fig. 2 is an explanatory diagram of an example of the present invention,
FIG. 3 is a sectional view taken along the line of FIG. 2. A... Can body, l... Can body length, 18... Pin conveyor, 19... Can body support pin, 30... Conveyor (whole) in the sample can take-out device, 31... Its rising portion, 33... Arc part, 34...Horizontal part, 37...Flat belt, 38...Frame body, 53...
Can body attracting device, 40... variable speed motor, 60...
... Can body detection device, 70 ... Pressurized air outlet.

Claims (1)

[Claims for Utility Model Registration] A rising portion that faces a can body support pin of an ascending pin conveyor, is spaced from the tip of the can body support pin by more than the length of the can body, and advances parallel to and in the same direction as the pin conveyor; A flat belt conveyor comprising a horizontal portion extending in the opposite direction to the pin conveyor side via an arcuate portion following the ascending portion; and at least the ascending portion, the arcuate portion, and the horizontal portion near the arcuate portion of the flat belt conveyor. a can attracting device which is fixedly installed and which attracts can bodies to the flat belt conveyor; and a jet of pressurized air which blows the bottomed can bodies supported by the can body support pins toward the ascending portion of the flat belt conveyor. a can body detection device that detects can bodies advancing on the horizontal portion of the flat belt conveyor; and a can body detection device that detects can bodies advancing on the horizontal portion of the flat belt conveyor; 1. A device for taking out sample cans from a pin conveyor, comprising: a drive device that drives the device and switches the speed to a speed lower than the speed according to a signal from the can body detection device.