JPS6052055B2 - high speed feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for feeding already printed tape-like materials at high speed.

It is easy to manufacture a device that feeds a roll of tape at a constant speed and length every hour for printing or cutting.

In other words, it can be pulled out using a constant-velocity drum or the like.

However, in an apparatus that draws out a tape on which the same pattern (for example, labels) has already been printed successively one pattern at a time, for example, one label at a time, the tape cannot be drawn out at a constant speed.

These include the accumulation of slight deviations in the printing position on the tape, the accumulation of elongation and shrinkage of the tape itself during printing, elongation when feeding while being pulled strongly at high speed, the influence of humidity, and the conditions when stored in roll form. This is because many other conditions such as slip during unwinding and resistance on the unwinding roll side are influential. The present invention has been made in view of the above points, and an object of the present invention is to provide a feeding device which has an extremely simple structure and is capable of accurately capturing one pattern at a time and sending it at high speed. Next, an example will be described.

<1> Overall structure A roll stand 1 on which a roll 11 on which a tape-shaped label or the like is wound is set is located at one end.

The tape T unwound from the roll 11 on the roll table 1 is moved by a roller 12 that keeps the tape T under tension and a guide roller 1.
3 and enters feeding device A. The tape T is pulled out from the roll 11 by the pulling force of the feeding device A, and fed into the cutting device B where it is cut into pieces and used as labels L for the next purpose, such as pasting on containers. . <2> Feeding device <2-1> Driving drum The feeding device A is provided with a low-speed driving drum 2 on the upstream side where the tape T moves, and a high-speed driving drum 3 on the downstream side.

Low speed and high speed refer to the moving speed of the drum 2 surface.

The radius of one or both of the drive drums 2 and 3 can be adjusted, and in principle they have a structure as shown in FIG. 2.

That is, the drum has a center hole 21 on its solid shaft and is connected by vertical slits 22 and 32 between the center hole and the periphery, and one propelling screw 23 is inserted through the vertical slits 22 and 32. It is provided so that it can be operated from the outside.

Therefore, although the number of revolutions per minute of both drums is the same, the low-speed drive drum 2 rotates the propelling screw 23 to make the distance between the vertical slits 22 slightly narrower than in the free state, and the high-speed drive drum 3 rotates the vertical slit 32. By setting the spacing slightly wider or changing the radius of only one side, accurate speed differences can always be obtained.

Specifically, the circumferential length of the low-speed drive drum 2 is slightly shorter than the length of one label L after cutting (for example, minus 2
717, the circumference length of the high-speed drive drum 3 is the same amount (2T
fn) longer than the length of one label.

Another embodiment of the driving drums 2 and 3 is shown in FIG. 3, in which the vertical slits 22 and 32 are arranged in a staggered state, two propelling screws 23 are provided in parallel, and the propelling screw 5 is connected to a common vertical screw 24. Engage in orthogonal state.

Therefore, by rotating the vertical screw 24 from the top of the drum, the vertical slits 22, 32 can be opened and closed freely, and a large recess is formed on the drum circumference! Not possible.

The propelling screw 23 passes through the slits 22 and 32 at right angles, and the head 23A is built into one side of the slits 22 and 32 so that it can only rotate but cannot move in the screw axis direction, and the head 23A is built into the other side of the slit. A configuration in which the threaded part 23B is screwed in, and other similar configurations known in the art can be adopted.

(FIGS. 10 and 11) 2-2> Idle Wheel Device A low speed idler 4 is provided in contact with the low speed drive drum 2, and a high speed idler 5 is provided in contact with the high speed drive drum 3.

j The central shafts 41 and 51 of both idlers 4 and 5 are rotatably attached to both ends of the rocking plate 6, and the rocking plate 6 itself is driven on the floor of the aircraft via its rotating shaft 61. It is attached to a slide plate 62 that can slide toward the drums 2 and 3. 4. Therefore, by adjusting the position of the slide plate 62, it is possible to bring each idler wheel 4, 5 into contact with each driving drum 2, 3 with an appropriate pressure. On the other hand, a long swinging arm 7 is integrally formed in a part of the swinging plate 6, and a free end 71 of this swinging arm 7 is formed.
On the side, solenoids 72 and 73 are located on both sides.

When either of the solenoids 72 and 73 slightly pushes the swinging arm 7, the swinging plate 6 rotates slightly around the rotating shaft 61.

As a result, one of the two idler wheels 4, 5 will be strongly pressed against the opposing drive drums 2, 3, and the other set will come out of contact.

2-3> Other cutting device B is not on the extension line 1 of the tape T that is in contact with both drive drums 2 and 3, so the high speed drive drum 3 and cutting device B
The tape T is bent once between.

A deflection absorbing device C is provided outside this bending point.

This device C absorbs the amount of deflection of the tape T when the end of the tape T, which continues to be fed by the force of the drive drums 2 and 3, is intermittently stopped due to resistance during cutting, and immediately after cutting, that is, after the resistance is released. This is a device that uses the elasticity of the tape T to feed it.

Therefore, as shown in the figure, a vertical receiving groove 81 is formed in a part of the absorbing drum 8, so that the tape T that is bent when cut is removed.
It is also possible to adopt a device in which the material is received in the receiving groove 81 and immediately sent out by the rotation of the drum 8.

It is also possible to adopt a device in which a simple vertical wall is moved back and forth toward the tape T side, and the tape T is repeatedly absorbed and pushed out in excess length.

Note that guide walls 82 for guiding the tape T are provided on both sides of the tape T at positions before and after the absorption drum 8.

The cutting device C can employ a combination of a fixed blade 9 and a rotary blade 91, or other known devices.

[3] Tape T1 is printed on the back side of the tape mark and phototube tape T or at an appropriate position when printing.

The pitch P between one mark T1 and the next mark T1 is the interval between one label printed on the tape T. If the length of one mark T1 is a, then the interval between the two phototubes Rl and R2 arranged side by side in the tape moving direction is set to be narrower than P+a and wider than P.

(FIG. 4) The appropriate position for installing the phototubes Rl and R2 is upstream of the absorption drum 8 and as close to the cutting device B as possible.

A phototube has a built-in light emitting part and a light receiving part, and when the light from the light emitting part hits a well-reflected area (outside the black mark) and the reflected light is captured by the light receiving part, we will explain the case of using a commercially available product that produces 0N. Other models can be similarly adopted.

One of the two phototubes Rl and R2 is connected to the upstream phototube R.
1, the check signal of this phototube R1 is the solenoid 73 on the 1 side that pressurizes the low speed idler wheel 4 against the low speed drive drum 2.
(hereinafter referred to as the low speed solenoid).

(Fig. 5) On the other hand, the photocell R2 on the downstream side is the high-speed idler 5.
is input to the solenoid 72 on the side that applies pressure to the high-speed drive drum 3 (hereinafter referred to as the high-speed solenoid).

The phototubes Rl and R2 repeatedly blink, and the interval between them is so arranged that they light up once per revolution of the drive drums 2 and 3.

Therefore, there are two timing switches between the power supply and the phototube.
Set up.

The timing switch ST may have a structure in which, for example, a slit is opened in a part of a disk, and phototubes are sandwiched between the top and bottom of the slit.

(Fig. 6) The rotation speed of this disk is set to be the same as the number of revolutions per minute of each drive drum 2, 3.
Timing switch ST closes once per rotation of
Each of the lightning tubes Rl and R2 will emit light.

Next, the operation will be explained.

<1> Setting the tape Unwind the tape T from the roll 11 and pass it between each drum to the position of the cutting blade 9.

In this state, the phototubes Rl, R2 emit light and are sensitive to the mark T1, respectively.

The position of R2 and the position of the slit of timing switch ST are determined. At this time, each idler wheel 4, 5 is in contact with each driving drum 2, 3 with equal pressure, so that the tape T is held with an appropriate pressure. <2> Delay in tape feeding (Fig. 7) When the operation starts, the tape T is fed by the friction between the drive drums 2, 3 and the idler wheels 4, 5.

However, since the distance between the two phototubes Rl and R2 is close to the distance between the outsides of the two marks T1, if the tape T feeding speed is slightly delayed, the moment the phototubes Rl and R2 emit light, the downstream phototube R2 will move outside the mark T1. It reacts to reflective surfaces.

The signal is immediately input to the high speed solenoid 72 and the swinging arm 7
By pressing , the high speed idler 5 is pressurized against the high speed drive drum 3 and the low speed side is released.

Therefore, the feeding speed of the tape T increases, and at the next light emission, the light from both phototubes Rl and R2 hits the mark T1 and is reflected, and the activated circuit continues to maintain itself.

(Fig. 8) [3] Overrunning of tape feeding (Fig. 9) If the high-speed drive drum 3, which has a circumference slightly longer than LL labels, continues to feed the tape, an overrunning state will occur, and when the phototube emits light, the upstream photocell The light emitted from R1 is reflected outside the mark T1 and emits a signal.

The signal is input to the low speed solenoid 73, and the low speed idler 4
Press it against the low speed drive drum 2 and release the high speed side. Therefore, the feeding speed of the tape T decreases, and at the time of the next light emission, both phototubes Rl
, R2 are both absorbed by the mark T1 and do not react.

In other words, the state shown in FIG. 8 occurs again.

4〉 As mentioned above, the adjustment tape T of the drive drum is always corrected within a small error range by switching between high and low speeds, but if it is excessively sensitive, the number of switchings will be too large and maintenance of the mechanism will be difficult. It may be undesirable.

At that time, by temporarily stopping the machine and slightly changing the distance between the slits 22 and 32 by turning the propelling screw 23, the adjustment can be made within the allowable error range and without excessive switching operation. In this case, since the amount of adjustment is several millimeters in circumference, the amount of opening and closing of the slits 22 and 32 only needs to be extremely small.

<5> The tape T, which is continuously fed by the cutting device, is prevented from advancing when cutting, but the amount of deflection is absorbed by the absorbing device C, which is repeated and smooth feeding and cutting are possible. .

As described above, the present invention enables the diameter of the drive drum for speed switching to be easily adjusted in a device for pulling out from a roll a tape on which the same pattern, characters, etc. and check marks have already been printed. . Therefore, it is possible to repeat the operation of checking overtravel or delay from the fixed position for each mark, and if the tape is traveling too far, it is delayed slightly, and if it is delayed, the feed speed is increased slightly. It is not affected by any amount of elongation or accumulation during printing.

Furthermore, the diameter and circumference of the drive drum can be easily adjusted so that the speed operation is sensitive and not excessive, so the durability of the machine will not be damaged due to too many switching operations. Accuracy can be satisfied.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1: Layout diagram of one embodiment of the device of the present invention, Figures 2 and 3: Explanatory diagram of the structure of the drive drum, Figure 4: Diagram showing the relationship between phototubes and marks, Figure 5. Figure: Diagram showing the relationship between phototube and solenoid, Figure 6: Wiring explanatory diagram, Figure 7
Figures 10 and 11: Explanatory diagrams of the structure of the propulsion screw.

Claims (1)

[Scope of Claims] 1. In a device that unwinds a tape on which the same pattern and check mark have already been printed, the position of the check mark is detected when a photocell is emitted, and the position of the check mark is detected when the photocell is emitted, and the A high-speed feeding device configured to selectively apply rotational force to the tape and configured to change the diameter of the drive drum. 2. The invention according to claim 1, wherein vertical slits are provided in both the low-speed drive drum and the high-speed drive drum, or in one of the drums, and the interval between the vertical slits can be adjusted.