JPS6249981A - Detector for sheets - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a paper sheet detection device for detecting foreign objects, thick objects, and hard objects, such as mail.

[Technical Background of the Invention and its Problems] A conventional bending and hardness detection device for detecting the bending and hardness of mail is configured as shown in FIG. That is, the rollers 2, 3.degree. 4 are provided with a slight distance from the conveyance path 1. And those rollers 2, 3 .
When a hard mail P passes over the mail P, the hardness of the mail P pushes the roller 3 downward, and the rotation of the roller 3 also rotates the detection lever 5, turning on the micro switch 6.

Then, the signal from the microswitch 6 is supplied to the signal processing circuit 7. Thereby, the signal from the signal processing circuit 7 is supplied to the driver 8. As a result, the driver 8 operates the solenoid 9 to pull the gate 10 upward.

Thereby, the hard mail P conveyed through the conveyance path 1 is guided to the reject section 11. Further, mail P whose hardness has not been detected is guided to a conveyance path 10 by the action of the gate 9, and is conveyed to a subsequent processing section (not shown).

Further, the thickness detection device for detecting the thickness of mail is the 11th thickness detection device.
It is configured as shown in the figure. That is, the conveyance path 11
A pair of rollers 12 and 13 are provided facing each other, and when a thick mail P passes between these rollers 12 and 13, the roller 13 is pushed downward by the thickness of the mail P. This rotation of the roller 13 also causes the detection lever 15 to rotate, turning on the microswitch 16. Then, the signal from the microswitch 16 is supplied to the signal processing circuit 17. Thereby, the signal processing circuit 17 detects that the mail P is thick.

Generally, in mail processing equipment such as sorting machines or sorting and stamping machines, a combination of two bending, hardness detection devices, and thickness detection devices is used to detect mail items that are not suitable for mechanical processing.
In other words, it detects and eliminates foreign objects, thick objects, and hard objects.

However, the above-mentioned bending and hardness detection device cannot detect hardness that is less than the distance (Ll) between rollers 2 and 3, and can only detect hardness along the conveyance direction. Furthermore, the hard object at the tip often hits the roller 3, causing paper jams.

Further, in the thickness detecting device described above, the roller 13 is pressed with a certain degree of force by the spring 14.

Therefore, foreign matter cannot pass between the rollers 12 and 13,
Sometimes I got stuck. Moreover, even if the overall thickness was within the specified range, it was not possible to detect large variations in thickness.

Therefore, relatively small foreign objects, thick objects, and hard objects could not be detected by the detection method described above.

[Object of the invention] This invention was made in view of the above circumstances, and its purpose is to detect ordinary foreign objects, thick objects, and hard objects, as well as detect small foreign objects, thick objects, and hard objects. It is an object of the present invention to provide a paper sheet detection device that can reliably perform the following.

[Summary of the Invention] In order to achieve the above object, the present invention provides a first roller on a conveyance path on which paper sheets are conveyed, on which unevenness is formed in a direction perpendicular to the conveyance direction of the conveyance path. , a second roller having projections and depressions that engage with the projections and depressions of the first roller is provided between the first roller and the transport path, and the thickness of the paper sheets transported through the transport path is determined. , the amount of movement of the first and second rollers is detected depending on their hardness.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a mail bending hardness detecting device as a paper sheet detecting device of the present invention, which has the following configuration. That is, first and second rollers 22 and 23 are provided opposite to each other with respect to a conveyance path 21 constituted by conveyor belts 20a and 20b. As shown in FIG. 2, the first roller 22 has an uneven curved surface formed in a direction perpendicular to the conveyance direction a of the conveyance path 21.
3 is provided to sandwich the first roller 22 and the conveyance path 21, and has curved surface irregularities that engage with the curved surface irregularities of the roller 22 of Ti1. The first roller 22 is rotatably fixed, and the second roller 23 is rotatable and movable by an arm 25.25 that rotates about a shaft 24 as a fulcrum. The shaft 24 has
A detection lever 26 that rotates as the arm 25.degree. 25 rotates is fixed. The end of the detection lever 26 is tensioned by a spring 27.

A microswitch 29 as a detector is provided near the detection lever 26. The output of this microswitch 29 is supplied to a driver 31 via a signal processing circuit 30. The driver 31 operates a solenoid 32 in response to a signal supplied from the signal processing circuit 30 to pull the gate 33 upward. As a result, the mail P conveyed through the conveyance path 21 is guided by the gate 33 via the guide 36 to the ejecting section 34 for removal, or conveyed by the gate 33 to a subsequent processing section (not shown). It will lead you to Route 35.

Further, the lever 26 is stopped by a stopper 28a.
By doing so, the first roller 22 and the second roller 23
The distance between the two is set to a specified distance. This prevents the conveyor belts 20a, 20b from meandering, and also prevents paper jams when mail P enters.

Further, the lever 26 is stopped by a stopper 28b to protect the microswitch 29.

Next, the operation in such a configuration will be explained.

For example, let's take the above 1. When a hard mail P passes between the second rollers 22 and 23, the hardness of the mail P pushes the roller 23 downward, and the movement of the roller 23 also rotates the detection lever 26. Turn on the micro switch 29. Then, the signal from the microswitch 29 is supplied to the signal processing circuit 30. Thereby, the signal from the signal processing circuit 30 is supplied to the driver 31. As a result, the driver 31 operates the solenoid 32 and the gate 3
Pull up 3. As a result, the hard mail P conveyed through the conveyance path 21 is guided to the reject section 34 via the guide 36.

Furthermore, the mail P1 with foreign matter or the thick mail P is also rejected in the same way as the hard mail P described above.

Also, postal items for which hardness, thickness, foreign matter, and thickness were not detected.
is guided to the conveyance path 35 by the action of the gate 33, and conveyed to a subsequent processing section (not shown).

As mentioned above, 1. The second roller has a curved surface unevenness in a direction perpendicular to the conveying direction (vertical direction), and the first roller has a curved surface unevenness. The projections and depressions on the curved surface of the second roller are provided in engagement with each other. This makes it possible to detect the bending hardness in the direction perpendicular to the conveying direction, and also to reliably detect small foreign objects, thick objects, and hard objects. Furthermore, paper jams can be reduced, and costs can be reduced by reducing roller failure.

In the above embodiments, the unevenness of the curved surface engages with each other, but the invention is not limited to this, and the engagement is not limited to this. It can be implemented in the same way even if Also, the curved surfaces are shown in Figures 5 and 6.
As shown in the figure, it may be formed in a pseudo manner by a plurality of rotating bodies. Furthermore, instead of curved surfaces, Figures 7 and 8
As shown in the figure, a combination of four parts and a convex part may be used.

Alternatively, as shown in FIG. 9, it may be formed of a roller 41 having one curved surface and a plurality of rollers 42, 43, 44. In this case, rollers 42, 43 .
Since different detections are performed for each roller, the springs of the individual rollers can be weakened, jumping is eliminated, and detection followability is good. Furthermore, partial thick objects and partial foreign objects can be detected at the same time.

Furthermore, although a case has been described in which a conveyance belt is interposed between the rollers, the present invention is not limited to this, and a case may be adopted in which a conveyance belt is not interposed.

Furthermore, the detection lever may be detected optically, magnetically, or capacitively.

[Effects of the Invention] As detailed above, according to the present invention, ordinary foreign matter,
It is possible to provide a paper sheet detection device that can detect thick and hard objects and can also reliably detect small foreign objects, thick objects and hard objects.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention, FIG. 1 is a diagram schematically showing the overall configuration, and FIG.
．． FIG. 3 is a diagram for explaining the configuration of the second roller;
9 to 9 show the first example in another embodiment. FIG. 10 is a diagram for explaining the configuration of the second roller, FIG. 10 is a diagram for explaining a conventional bending hardness detection device, and FIG. 11 is a diagram for explaining a conventional thickness detection device. be. P... Mail (paper sheets), 21... Conveyance path, 22.
...First roller, 23...Second roller, 25...
- Arm, 26...Detection lever, 29...Micro switch, 30...Signal processing circuit, 31...Driver, 32...Solenoid, 33...Gate. Applicant's representative Patent attorney Takehiko Suzue Figure 5 Figure 6 Figure 7 Figure 8 Figure 9

Claims (5)

[Claims] (1) A conveyance path through which paper sheets are conveyed, a first roller provided on this conveyance path and having unevenness formed in a direction perpendicular to the conveyance direction of the conveyance path, and this first roller. A second roller is provided across the conveyance path, and is formed with unevenness that engages with the unevenness of the first roller, and moves depending on the thickness and hardness of the paper sheet conveyed through the conveyance path. A paper sheet detection device comprising a detection means for detecting the amount of movement of the first and second rollers. (2) The paper sheet detection device according to claim 1, wherein the first roller is fixed and the second roller is movable. (3) The paper sheet detection device according to claim 1, wherein the irregularities of the first and second rollers are curved surfaces. (4) The paper sheet detection device according to claim 1, wherein the irregularities of the first and second rollers are convex and convex. (5) The paper sheet detection device according to claim 1, wherein the first and second rollers are composed of a plurality of rollers.