JPS5921148Y2 - Vacuum belt conveyor device - Google Patents

Description

[Detailed description of the invention] This invention conveys paper sheets to a predetermined position using a vacuum belt, and then allows them to fall, change direction, move rapidly in the same direction, etc. without being restrained for the next station, and simultaneously The present invention relates to a conveying device that starts conveying the next paper sheet using a belt.

Conventionally, there have been so-called vacuum belt conveying devices that move a perforated belt over a vacuum chamber and convey paper sheets while sucking them onto the belt, but once the sheets have been conveyed to a predetermined position, they are transferred to the next one. In order to move the paper sheets by changing the speed and direction in steps, the speed is restricted by the speed of the vacuum belt, and this has to be carried out after the paper sheets have been conveyed outside the vacuum belt.

This caused waiting time and was inefficient.

Also, when shaking off the restraints, negative effects on the feed could not be avoided.

In order to eliminate such drawbacks, the present invention divides the vacuum chambers provided in a certain section into two or more rows into two groups, and also creates an endless vacuum belt with wide and narrow widths at a pitch corresponding to the conveying distance. , a large size that fits one group of the vacuum chambers is provided corresponding to each width portion, and furthermore, a large size that fits one group of the vacuum chambers is provided corresponding to each width portion, and further, one of the two groups of the vacuum chambers is determined by capturing the change in the width of the vacuum belt. By alternately evacuating the area and moving the vacuum belt sequentially through the wide and narrow areas, the paper sheets conveyed to a predetermined position are moved to a different speed in the next step without being restricted by the speed of the vacuum belt. An object of the present invention is to provide a vacuum belt conveying device that can simultaneously start conveying the next paper sheet to a predetermined position while moving in the direction .

The details of the present invention will be explained below with reference to the drawings.

FIG. 1 is a plan view of a vacuum belt conveying device showing an embodiment of the present invention, and FIG. 2 is an elevational view thereof.

(However, to avoid complication, please note that the pulley 23, which will be described later, is visible at the rear.)
Also, the wide part of the vacuum belt was omitted.

) In both cases, when the paper 7b is about to be transported to a predetermined position, the paper 7a is transported out of the right device at high speed in the next step without being restricted by the speed of the vacuum belt 1. It's just starting to happen.

The vacuum belt 1 has an endless ring shape in which narrow width portions 1a and wide width portions 1b are alternately continuous at a pitch of one working distance (-stroke).
-1.2-2.2-3, and one of them, for example 2-2, is a driving pulley and is moved.

A photosensor 4 is provided at a height such that light is transmitted through the narrow portion 1a of the vacuum belt 1 at an appropriate location at the rear of the device, and light is blocked from the wide portion 1b. Used to move at the pitch of one work,
To move one sheet of paper at the pitch of one work.

Therefore, as shown in FIG. 3C, the pitch for one operation is set longer than the length of the paper 7 in the longitudinal direction of the vacuum belt.

Further, the narrow width portion 1a is provided with an upper large size 1C, and the wide width portion 1b is provided with a lower large size 1d.

Next, behind the vacuum belt 1 between the pulleys 2-1, 2-2, there is a vacuum chamber 3 which is open to the vacuum belt 1 side, and is divided into upper and lower parts, with vacuum chambers 3a and 3b. The heights of the upper large size 1C and the lower large size 1d match each other.

When light passes through the photosensor 4, the vacuum chamber 3a becomes evacuated via the amplifier and the electromagnetic valve, and when the light is cut off, the vacuum chamber 3b switches to vacuo.

In addition, there is a drive roller 5 lined up on the right side of the pulley 2-2, and a pinching roller 6 provided in front of the drive roller 5 that pinches or separates the paper 7 (the two-dot chain line 6' in FIG. 1 indicates the pinching roller 6). indicates a state where it is separated from the paper 7.

), the paper 7 is conveyed by the rotating direction and circumferential speed of the drive roller 5.

Similarly, the vacuum belt 1 is provided on the front side of the pulley 2-1.
A pinch roller 9 (which pinches and separates the paper 7)
A two-dot chain line 9' in FIG. 1 shows a state in which the pinching roller 9 is separated from the paper 7.

) sandwich the paper 7 and convey the paper 7 at the moving speed of the vacuum belt 1.

Note that the photo sensor 8 stops the paper 7 conveyed from the left side of the apparatus by an external device (not shown), and
It is for issuing a signal to start conveying the paper 7 to a predetermined position, and is provided at a position slightly to the right of the pulley 2-1, lower than the upper end of the paper 7, and higher than the upper end of the vacuum belt 1.

Next, FIGS. 3 and 4 are provided to facilitate explanation of the operation.

FIG. 3 is a developed view of the vacuum belt 1 in the elevational view of FIG. 2 extended onto a plane in front of the pulleys 2-1 and 2-2.
FIG. 4 shows the time t1 at which the leading edge of the paper 7 passes.
t2. . . . is a time diagram showing the movement of the main parts with respect to tlO, 17 from the top shows the positional relationship of the movement of the paper 7, and the upper solid line indicates the lower two-dot chain line S in the case of long paper.
indicates the case of short paper.

The next numeral 17' indicates the speed of the paper 7, with the bottom being at rest and the higher the speed, the higher the speed.

The next numeral 18 indicates the operating state of the photosensor 8, the one layer S indicates light transmission, the lower C indicates light blocking, and the two-dot chain line indicates the case of short paper.

The next numeral 19 indicates the operating state of the pinching roller 9, the lower part of the upper part is in contact with the paper, the lower part L is the detached state, and the two-dot chain line indicates the case of a short paper.

The next numeral 14 indicates the operating state of the photosensor 4, with the upper S indicating the light transmission state and the lower C indicating the light blocking state.

The next 11 indicates the movement of the vacuum belt 1, and the upper M indicates movement.
S at the bottom indicates a stopped state.

The following numerals 131 and 13b indicate the operating states of the vacuum chambers 3a and 3b, respectively, where the upper square indicates a vacuum, and the lower A indicates an atmospheric pressure state.

The next numeral 16 indicates the operating state of the pinching roller 6, the upper T indicates the contact with the paper, and the lower L indicates the detached state.

t at the bottom is a time axis showing the time course of the position of the leading edge of the paper 7, and time points t1, . t2. t3...t9
．． tlo is marked.

Now, to explain the operation of the vacuum belt conveying device of the present invention with reference to an embodiment, first, the paper 7b is conveyed from the left side of the device to the right by an external device (not shown). Block out light.

This signal causes the paper 7b to stop.

This is time point 11 on the time axis t in FIG.

At this time, the vacuum chamber 3a behind the large size 1C in the narrow part of the vacuum belt 1 in FIG. The drive roller 5 is not restricted to the speed of 1.
, are transported out of the apparatus at high speed by the action of the pinching rollers 6.

Although the paper 7b is started based on the signal from the photosensor 8 described above, it may also be based on a completely different signal.

When a start command is received, the vacuum belt 1 starts moving and the pinching roller 9 comes into contact with the paper 7b, so that the paper 7b starts moving to the right at the speed of the vacuum belt 1.

Eventually, as shown in FIG. 3B, when the paper 7b and the large size 1d of the wide portion 1b of the vacuum belt 1 enter the vacuum chamber 3b, which is in a vacuum state, the paper 7b is attracted by the vacuum belt 1 and is more securely attached to the vacuum belt. It is conveyed according to the speed of 1.

(In FIG. 3, the diagonal lines added to the vacuum chambers 3a and 3b indicate that the vacuum chambers are in vacuum, and the diagonal lines in the large size 1d indicate holes that function as paper suction.

) If the paper 7b is short, the light from the food sensor 8 will be transmitted at the 12th point, and this signal will cause the pinching roller 9 to move away from the paper 7b to the position 9', but as mentioned above, the large size 1d and the vacuum chamber 3b are already working. Therefore, conveyance of paper 7b continues.

If the paper 7b is long, this switching point will be t3.

When the paper 7b advances and reaches the 14th point, the paper 7b reaches a predetermined position and the light from the photosensor 4 is transmitted as shown in FIG. 3a becomes a vacuum and the suction action of the large size 1d disappears, the vacuum belt 1 stops, and the sandwiching roller 6 comes into contact with the paper 7b, so the paper 7b is not restricted by the movement of the vacuum belt 1 and is moved by the drive roller. It detaches from this device at high speed due to the circumferential speed of 5.

The pinch roller 6 is moved away from the drive roller 5 and returned to the 6' position by the signal of the photosensor 4 and the timer or by other signals.

This is time t5.

Around this time t5, the next sheet 7a is conveyed from the left side of the apparatus by an external device (not shown).
At this point, the light from the photosensor 8 is interrupted, and the paper 7a is stopped by that signal.

These 16 points correspond to the 11 points mentioned above, and are as follows.
7°t8. t9. The above and t2. t3. t4
, 15, but it is only the narrow part 1 of the vacuum belt that sucks and conveys the paper 7a.
The difference is that the large-sized IC provided in a and the vacuum in the vacuum chamber 3a are used.

Therefore, when the paper 7a reaches a predetermined position at time t, the photosensor 4 through which light has passed until now is cut off, the vacuum chamber 3a becomes atmospheric pressure, the suction action of the paper 7a stops, and the vacuum belt 1 is no longer constrained by the movement of vacuum chamber 3b, and instead
becomes evacuated and prepares for transporting the paper 7b to be handled next.

The time tlo when the paper 7b cuts the photosensor 8 is exactly the same as the above-mentioned time 11, and the following times 11, 1. ,,...
...The same cycle as tlO is repeated.

Note that in the above example, the paper that has been conveyed to a predetermined position by the vacuum belt is removed from the restraints of the vacuum belt and carried away at high speed, but it is also possible to let it fall as it is or to carry it away in a different direction with an inclined roller. It is.

Further, although the paper was designed to be conveyed on a vertical plane, it is obvious that the paper does not necessarily need to be conveyed on a vertical plane, but may be conveyed on a horizontal plane or an inclined plane.

Furthermore, there were two rows of vacuum chambers and large formats that matched them, but three
If the above rows are arranged and the A group rows and B group rows are arranged alternately, the structure will be complicated, but it is obvious that when the paper is sucked and pulled, the point of action will not be biased and it will be dynamically balanced. be.

As explained above, the present invention divides the vacuum chambers provided in a certain section into two or more rows into two groups, and also uses an endless vacuum belt that is alternately wide and narrow at a pitch equal to the conveying distance. None, each width part is provided with a large size that fits the part of any one group of the vacuum chambers, and furthermore, the width of the vacuum belt is changed, and one of the two groups of the vacuum chambers is alternately attached. By creating a vacuum at It is possible to provide a vacuum belt conveying device that can be used in a wide range of applications, shortening the cycle time by transferring to the desired position, and allowing free movement in the next step.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the vacuum belt conveying device of the present invention, FIG. 2 is an elevational view of the device shown in FIG. 1, and FIG.
FIG. 4 is a developed view of the vacuum belt portion shown in FIG. 4, and is a time line diagram explaining changes in operation. 1... Vacuum belt, 3a... Upper vacuum chamber, 3b... Lower vacuum chamber, 4, 8...
Photo sensor, 5... Drive roller, 6, 9...
...Pinch roller, 7a...Paper a, 7b.
...Paper.

Claims (1)

[Scope of utility model registration request] A vacuum belt conveying device that has a vacuum chamber in contact with the back side of a perforated vacuum belt, and conveys paper sheets while sucking them onto the surface of the vacuum belt. The length of the narrow part and the wide part of the vacuum belt is longer than the length in the longitudinal direction of the paper sheet, and a plurality of suction holes are provided in a row in the longitudinal direction in the narrow part of the width. In the wide part, a plurality of suction holes are provided in one row at different width positions from the suction holes in the longitudinal direction, and a vacuum chamber is provided at a position corresponding to each row, and the intake air from both page empty spaces is A vacuum belt conveying device characterized in that a narrow portion and a wide portion of the vacuum belt are switched in response to a signal detected by a sensor.