JP2000318921A - Failure detection mechanism of folding machine - Google Patents

Abstract

(57) [Problem] To provide a folding failure detection mechanism of a paper folding machine capable of detecting a folding failure of a form or a phenomenon leading to a folding failure. SOLUTION: Detecting means 51, 52 are provided for detecting the presence or absence of a form (100) at a position outside the form width of the form (100) in the conveying path, and the form 10 is detected by the detecting means 51, 52.
If 0 is detected, it is determined to be defective. Form 100
Detecting means 53 and 54 for detecting the presence or absence of the form 100 at a plurality of positions arranged in the width direction of the transport path, and when the difference in the timing of detecting the form 100 between the plurality of positions exceeds a specified value, Judge as bad. In a state where the folded form 100 is positioned, detecting means 61, 62, 63, 64 for detecting the presence or absence of the form 100 at a position outside a predetermined folded size of the form 100 are provided. If the form 100 is detected by 63 and 64, it is determined to be defective.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding failure detecting mechanism for a paper folding machine used in a sealing machine.

[0002]

2. Description of the Related Art A paper folding machine used in an enclosing and sealing machine will be described with reference to FIG. FIG. 11 is a diagram showing an example of the structure of a general roller-type paper folding machine. The paper folding machine illustrated in FIG. 11 includes six rollers 7 for paper folding work,
8, 9, 10, 11, 12 and four folding sections 41,
It is provided with 42, 43, and 44, and can perform up to four times folding of a form. In the case shown in the figure, the setting is such that the folding work sections 41 and 42 are used, and the folding work sections 43 and 44 are not used, and two folds are formed. The form of folding of the form is determined by the folding work units 41, 42, 43, 4
Various settings can be made by selecting 4 and adjusting the positions of the stoppers 31 and 32 of the folding operation unit.

First, when a form (not shown) is carried in the direction of arrow A, the form is guided by rollers 3 and 4 to guides 1 and 2.
After being conveyed between the guides 21 and 22 by rollers 7 and 8 along the arrow B. Then, the leading end of the form is stopped by the stopper 31, and the form is still fed by the rollers 7 and 8, so that the form is slack at the exit of the rollers 7 and 8. The first fold can be formed on the form by adding the slack to the rollers 8 and 9. Then, the form is continuously fed between the guides 23 and 24 along the arrow C by the rollers 8 and 9, and the fold formed in the first folding operation is stopped by the stopper 32. Still further, when the form is fed out by the rollers 8 and 9, slack again occurs, and the rollers 9 and 10 hold the slack again.
A second fold is formed on the form. Thereafter, the sheet passed between the rollers 10 and 11 is guided by the guide 71, and passes between the rollers 11 and 12 guided by the guide 72, and the sheet folded in the direction of arrow F is discharged.

[0004]

In a paper folding machine having such a configuration, a bent fold is formed with respect to a designated fold, for example, when a form to be conveyed is inclined with respect to the conveyance path of the paper folding machine. Would. In rare cases, a fold failure or a fold jam, in which a designated fold cannot be made due to deformation of a form, may occur. Such a thing, for example,
When the paper folding machine is connected to the enclosing / sealing machine, it leads to enclosing and sealing the form with the poor folding in the envelope, which significantly lowers the reliability of the system.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a folding failure detecting mechanism of a paper folding machine capable of detecting a folding failure of a form or a phenomenon leading to the folding failure.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problem, the invention according to claim 1 uses a defect detecting mechanism of a paper folding machine to detect the presence or absence of a form at a position outside the form width of the form transport path. It is provided with a detecting means for detecting, and when a form is detected by the detecting means, it is determined as a defect.

According to the first aspect of the present invention, when the form is detected by the detecting means for detecting the presence or absence of the form at a position outside the form width of the form transport path, the form is determined to be defective. It is possible to detect a folding failure, a skew leading to a folding failure of a form, and the like.

According to a second aspect of the present invention, in the folding failure detecting mechanism of the paper folding machine, the operation of the end portion of the form for forming a slack in the form by forming a fold in the form by being gripped by a roller. Detecting means for detecting the presence or absence of a document on a transport path leading to a stopper that regulates a document, and determining that the document to be transported is not detected by the detecting device as a defect.

According to the second aspect of the present invention, a transport path leading to a stopper for regulating the operation of the end portion of the form in order to form a slack in the form by forming a fold in the form by being gripped by the roller. Since it is provided with a detecting means for detecting the presence or absence of the form in the above, if the form to be conveyed is not detected by this detecting means, it is determined as defective,
It is possible to detect that the desired folding operation has not been performed on the form.

According to a third aspect of the present invention, in the folding failure detecting mechanism of the folding machine, there is provided detecting means for detecting presence or absence of a form at a plurality of positions arranged in the width direction of the form conveying path. If the difference between the timings at which the forms are mutually detected exceeds a specified value, it is determined that the form is defective.

According to the third aspect of the present invention, there is provided a detecting means for detecting the presence or absence of a form at a plurality of positions arranged in the width direction of the form transport path, and a mutual detection time at the plurality of positions by the detecting means. If the difference exceeds a specified value, it is determined to be defective. Therefore, it is possible to detect a form folding defect, a skew that causes a form folding defect, and the like.

Here, when the form is folded a plurality of times, the form is folded into a substantially parallelogram by slightly tilting the top and bottom, and the form is folded into a substantially trapezoid (both sides of the form are trapezoidal. (Corresponding to the bottom and the bottom)), the folded form looks better when folded into a substantially parallelogram. Therefore, it may be necessary to make a determination that the form of the folded form is a substantially parallelogram with a slightly inclined top and bottom, but a defect if the form is substantially trapezoidal.

According to a fourth aspect of the present invention, in a folding failure detecting mechanism of a paper folding machine, a detecting means for detecting a difference in inclination between a top and bottom of a plurality of diffracted forms when performing a plurality of times of form folding. When the value detected by the detecting means exceeds a predetermined value, it is determined to be defective.

According to the fourth aspect of the present invention, there is provided a detecting means for detecting a difference in inclination between a top and a bottom of a form diffracted a plurality of times,
If the value detected by the detecting means exceeds a certain specified value, it is determined that the document is defective. Therefore, it is possible to detect a folding defect in which the top and the ground of the form are folded more than a certain degree.

According to a fifth aspect of the present invention, in the folding failure detecting mechanism of the folding machine, the presence or absence of the form at a position outside a predetermined folded size of the form is determined in a state where the folded form is positioned. It is provided with a detecting means for detecting, and when the form is detected by the detecting means, it is determined as defective.

According to the fifth aspect of the present invention, there is provided detecting means for detecting the presence or absence of a form at a position outside a predetermined fold dimension of the form with the folded form being positioned. If a form is detected by, it is determined that the form is defective.Therefore, it is necessary to detect a fold failure in which the top and bottom dimensions of the form are larger than a predetermined fold size and a fold defect in which the form width is larger than the predetermined fold size. Can be.

According to a fifth aspect of the present invention, the detecting means detects the presence or absence of a form at a position shorter than a predetermined fold size with respect to the stopper in a state where the leading edge of the folded form is abutted against the stopper. Detection means for detecting the presence or absence of a form at a position wider than the form width.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION <First Embodiment>
A first embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a side sectional view for explaining a folding failure detecting mechanism of a paper folding machine according to the present invention, and FIGS. 2 and 3 are diagrams for explaining a first embodiment, of which FIG. FIG. 3 is a diagram illustrating a state in which a form is normally conveyed, and FIG. 3 is a view illustrating a state in which the form is skewed.

The folding defect detecting mechanism of the paper folding machine according to the first embodiment includes detecting means for detecting the presence or absence of a form at a position slightly outside the form width of the form transport path. The main feature of this is that when a form is detected, it is determined to be defective.

The paper folding mechanism shown in FIG. 1 is the same as that described in the conventional example, except that guides 25 and 26 are provided in place of the guide 71, and guides 27 and 28 are provided in place of the guide 72. Is provided so that the folding operation units 43 and 44 are used in addition to the folding operation units 41 and 42. Therefore, the form conveyance path in the folding machine is, in order from the upstream side, the interval between the guides 1 and 2 → the interval between the rollers 8 and 7 → the interval between the guides 21 and 22 according to the arrow B (up to the stopper 31) → the roller Between 8, 9 → interval between guides 23 and 24 according to arrow C (up to stopper 32) → between rollers 9 and 10 → interval between guides 25 and 26 according to arrow D (up to stopper 33) → between rollers 10 and 11 → The interval between the guides 27 and 28 according to the arrow E (up to the stopper 34) → between the rollers 11 and 12 → the sheet ejection table 2 according to the arrow F
9 above. The basic configuration of such a folding machine is
Although the same applies to each embodiment described later, the folding working units 41 to 44 to be used are appropriately selected depending on a desired folding shape.

In the first embodiment, FIG.
As shown in FIG. 3, before the entrance to the guides 1 and 2, a sensor such as a transmissive photoelectric sensor for detecting the presence or absence of the form 100 at a position slightly outside the form width of the form 100 in the conveyance path. (Detection means) 51 and 52 are provided. Here, the setting of the positions of the detection points by the sensors 51 and 52 with respect to the form width is appropriately adjusted depending on the degree of skew determined to be defective. That is, the sensor 5
The narrower the width of the detection points by the sensors 1 and 52, the stricter the criteria for failure, and the wider the width of the detection points by the sensors 51 and 52, the looser the criteria for failure.

With the paper folding machine having such a configuration, the sensor 5
If the form 100 is normally conveyed along the conveyance path when performing the sheet folding operation while performing the sensing by the sensors 1 and 52, the form 100 is not detected by the sensors 51 and 52. Conversely, when the form 100 has a skew (having a certain angle or more), as shown in FIG. 3, at least one of the sensors 51 and 52 (in the case of FIG. And the form 100 can be detected. Thus, the sensors 51, 52
If at least one of the forms 100 is detected, the form 100 is determined to be defective and, for example, the folding machine is automatically stopped. In the case of this embodiment, the form 1
When 00 comes to a position just before the entrance to the guides 1 and 2, the occurrence of a defect can be recognized.

As described above, according to the first embodiment of the present invention, the sensor 5 for detecting the presence or absence of the form 100 at a position slightly outside the form width of the form 100 on the conveyance path.
1 and 52 (detection means).
Therefore, when the form 100 is detected, it is determined that the form 100 is defective, so that the skew of the form 100 can be detected.

In the first embodiment, the detecting means for detecting the form 100 at a position outside the form width is provided just before the entrance of the guides 1 and 2.
Other positions on the transport path of the form 100 may be used.

<Second Embodiment> Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. 1, 4 and 5. FIG. 4 and 5 are views for explaining the second embodiment, of which FIG. 4 shows a state in which a form is normally conveyed, and FIG. 5 shows a state in which the form is skewed. is there.

The folding defect detecting mechanism of the paper folding machine according to the second embodiment is provided with an end portion of a form for forming a slack for forming a fold in the form by being held by a roller. A detecting means is provided for detecting the presence or absence of a form on a transport path leading to a stopper for restricting the operation, and if the form to be transported is not detected by this detecting means, it is determined to be defective.

That is, the stopper 31 forms a slack in the form 100 by regulating the movement of the end portion of the form 100 in the traveling direction, and the slack is added to the rollers 8, 9 to form a fold in the form 100. As shown in FIGS. 1, 4 and 5, the paper folding machine detects the presence or absence of the form 100 at the interval between the guides 21 and 22, which are the conveyance paths leading to the stopper 31. Sensor (detection means)
53 and 54 are provided. Similarly, the paper folding machine includes guides 23 and 2 which are conveying paths to the stopper 32.
Sensors (detection means) 55 and 56 for detecting the presence / absence of the form 100 at intervals of 4 and sensors (detection means) 57 for detecting the presence / absence of the form 100 at the intervals of the guides 25 and 26 which are the transport paths to the stopper 33. , 58, stopper 34
1 at the interval between guides 27 and 28, which is the transport path leading to
Sensors (detection means) 59, 60 for detecting the presence or absence of 00
Are provided respectively. These sensors 53, 5
4, 55, 56, 57, 58, 59, and 60 are, for example, transmissive photoelectric sensors, but may be any other sensors that can detect the presence or absence of the form 100.

Then, the paper folding machine includes sensors 53 and 54.
Sensor 100 is not detected due to sensor 55,5
6, the form 100 is not detected.
Form 100 is not detected by 58, sensor 5
If any one of the forms 100 and 9 is not detected from 9 and 60, it is determined that the form is defective at that time, and the operation of the paper folding machine is stopped, for example.

For example, if the form 100 is not conveyed in the interval between the guides 21 and 22 and is passed through in a case where the form 100 is warped, the folding operation of the form 100 is reduced by one time. The fold designated at 100 is not formed. At this time, the form 100 cannot be detected by the sensors 53 and 54, and is determined to be defective. Therefore, it is possible to detect a folding defect in which the fold specified in the form 100 is not formed. Form 100
Is not conveyed between the guides 23 and 24, the form 100 is not conveyed between the guides 25 and 26, and the case where the form 100 is not conveyed between the guides 27 and 28. .

As described above, according to the second embodiment of the present invention, the form 100 is formed with a slack for forming a fold in the form 100 by being held between the rollers 8, 9 and the like. And a sensor 53 for detecting the presence or absence of the form 100 in a transport path (e.g., an interval between the guide 21 and the guide 22) leading to a stopper 31 or the like that regulates the operation of the end of the form 100. When the form 100 to be conveyed is not detected by the sensor 53, it is determined that the form 100 is defective. Therefore, it is possible to detect that a desired folding operation is not performed on the form 100.

In the second embodiment, the detection point by the sensor 53 is set near the stopper 31. However, the conveyance path to the stopper 31 (the interval between the guide 21 and the guide 22) is set. Other positions may be used. Further, the configuration is such that two points are detected in total near both ends in the width direction of the form 100 (for example, a configuration using two sensors 53 and 54), but the number of points to be detected is arbitrary. Also, the position of the detection point is determined by the form 100
(For example, the sensor 53 alone or the center of the form 100 in the width direction). These facts are included in the folding work units 42, 43,
The same applies to 44.

<Third Embodiment> Hereinafter, a third embodiment of the present invention will be described with reference to FIGS. 1, 4 and 5. FIG. 4 and 5 are diagrams for explaining the third embodiment (common to the above-described second embodiment). FIG. 4 shows a state in which a form is normally conveyed. FIG. 5 is a diagram showing a state in which the form is skewed.

The folding failure detecting mechanism of the paper folding machine according to the third embodiment includes a form transport path (for example, the guide 21,
(E.g., intervals of 22) and detecting means for detecting the presence or absence of a form at a plurality of positions arranged in the width direction. If the difference between the timings of detecting the form at the plurality of positions exceeds a prescribed value, it is determined to be defective. It is characterized by doing.

That is, in the third embodiment, the sensors 53 and 54 are arranged side by side in the width direction of the form 100, for example, at positions corresponding to both ends of the form 100 in the width direction. Then, the sensor 53 and the sensor 54
Of these, the time difference between the timing when one of the forms 100 is first detected and the time when the other one detects the form 100 next can be obtained, and this time difference is predetermined. If the value exceeds a specified value, it is determined to be defective. The same applies to the sensors 55 and 56, the sensors 57 and 58, and the sensors 59 and 60. Here, the predetermined value is appropriately adjusted according to the degree of skew that is determined to be defective. In other words, the smaller the specified value is, the stricter the defect standard becomes,
The larger the specified value is, the less criterion of failure is.

When the form 100 is normally conveyed as shown in FIG. 4 when performing the sheet folding operation by the paper folding machine having such a configuration, the timing at which the form 53 is detected by the sensors 53 and 54 is detected. Is the same. However, for example, when the form 100 is skewed as shown in FIG. 5, the timing at which the sensor 53 detects the form 100 is earlier than the timing at which the sensor 54 detects the form 100. If the time difference between the timing of detecting the form 100 by the sensor 53 and the timing of detecting the form 100 by the sensor 54 exceeds a predetermined value, it is determined that the form is defective. Can be detected.

As described above, according to the third embodiment of the present invention, the sensor 53 detects the presence or absence of the form 100 at a plurality of positions arranged in the width direction of the transport path of the form 100.
If the difference between the timing at which the form 53 is detected by the sensor 53 and the timing at which the form 100 is detected by the sensor 54 exceeds a specified value, it is determined to be defective. Since the determination is made, the skew of the form 100 can be detected.

In the third embodiment, the point detected by the sensor is located on the transport path of the form 100.
It may be a position other than those illustrated. Also, the timing at which the form 100 is detected by the sensor (the timing at which the leading end of the form 100 has passed the detection point) is viewed, but the timing at which the detection of the form 100 is terminated by the sensor (the trailing end of the form 100 determines the detection point). (Passing timing).

<Fourth Embodiment> Hereinafter, a fourth embodiment of the present invention will be described with reference to FIGS. 1, 6, 7 and 8.
It will be described based on. FIGS. 6, 7 and 8 are views for explaining the fourth embodiment, of which FIG. 6 shows a state in which the form is folded diagonally in the first folding operation.
Fig. 8 shows a state in which the form is folded obliquely even in the second folding operation, and the form becomes a substantially parallelogram. Fig. 8 shows a state in which the form is folded diagonally also in the second folding operation, and the form is substantially trapezoidal. FIG.

For example, when the form 100 is folded a plurality of times, even if the form 100 is slightly inclined at a predetermined folding angle, for example, as shown in FIG. It is said that when the top and bottom of the form 100 is folded substantially parallel (to be a substantially parallelogram), the appearance is not felt so badly. Even when the same inclination as shown in FIG. 7 occurs,
Contrary to the case shown in FIG. 7, as shown in FIG. 8, when the form 100 is folded so as to have a substantially trapezoidal shape, it is said that the appearance feels bad. Therefore, for example, instead of detecting the inclination of the form 100 only at a certain point in time and determining immediately as defective as in the third embodiment, the shape of the form 100 at the point in time when the form 100 is folded In some cases, it may be better to detect an error and determine that it is defective if the error does not satisfy the criterion.

Therefore, the folding failure detecting mechanism of the paper folding machine according to the fourth embodiment uses a detecting means (for example, the sensor 55,
56, 57, and 58), and when the value detected by the detection means exceeds a certain specified value, it is determined that a failure occurs.

That is, in the fourth embodiment, the arrangement of the sensors 55, 56, 57, 58, 59, and 60 is the same as, for example, the above-described third embodiment. Then, the inclination of one end (top) in the traveling direction of the form 100 is detected based on the delay (or advance) of the timing at which the sensor 55 detects the form 100 with respect to the timing at which the sensor 55 detects the form 100. In addition, the inclination of the other end (ground) in the traveling direction of the form 100 is detected based on the delay (or advance) of the timing at which the sensor 57 detects the form 100 with respect to the timing at which the sensor 58 detects the form 100. Then, by comparing these detected values, the form 10
A difference between the inclination of the top and the bottom of 0 is detected, and if this detected value exceeds a predetermined value, it is determined to be defective. The same determination is made by the sensors 57, 58, 59,
60 sets are performed. Also, for example,
In a case where the folding work unit 33 is not used, the same determination may be made by the set of the sensors 55, 56, 59, and 60. Here, the predetermined specified value is appropriately adjusted according to the degree of inclination between the top and the ground of the form 100 that is determined to be defective. In other words, the smaller the specified value, the stricter the criteria for failure, and the larger the specified value, the looser the criteria for failure.

When the paper folding operation is performed by the paper folding machine having such a configuration, for example, when the form 100 passes between the rollers 8 and 9, as shown in FIG. Suppose that the top and bottom of the form 100 are not parallel. Further, the form 100 is assigned to the rollers 9 and 10.
It is assumed that, at the point in time when the document 100 has passed through, the form 100 is folded obliquely again as shown in FIG. 7 and the top and bottom of the form 100 are almost parallel. At this time, the delay of the timing of detecting the form 100 by the sensor 56 with respect to the timing of detecting the form 100 by the sensor 55 is substantially equal to the delay of the timing of detecting the form 100 by the sensor 57 with respect to the timing of detecting the form 100 by the sensor 58. Become. Therefore, at this time, the form 100
If the difference between the top and bottom inclinations is detected to be small and the detected value is equal to or less than the specified value, it is not determined to be defective.

However, after being folded slightly obliquely as shown in FIG.
At the point of passing through between 10, as shown in FIG.
It is assumed that the form 100 is folded again obliquely and the top and bottom of the form 100 is further inclined. At this time, the delay of the timing of detecting the form 100 by the sensor 56 with respect to the timing of detecting the form 100 by the sensor 55 is significantly different from the delay of the timing of detecting the form 100 by the sensor 57 with respect to the timing of detecting the form 100 by the sensor 58. (In this case, the detection by the sensor 57 is earlier). Therefore, at this time, a large difference in the inclination of the top and bottom of the form 100 is detected, and if the detected value exceeds a specified value, it is determined that the form is defective.

As described above, according to the fourth embodiment of the present invention, the detecting means (for example, the sensors 55, 56, 57,
58, etc.), and if the value detected by the detection means exceeds a certain specified value, it is determined to be defective, so that it is possible to detect a folding defect in which the top and bottom of the form 100 is folded to some extent or more. it can.

Further, for example, even when a folding operation that causes a defect is performed in the defect detecting method described in the third embodiment, the defect is detected later (as shown in FIG. 7). When the folding operation for correcting the defect is performed, it is not determined to be defective, so that an effect of reducing unnecessary stopping operation of the paper folding machine can be obtained.

In the above-described fourth embodiment, the inclination of the leading end of the form 100 in the traveling direction is detected. However, the inclination of the trailing end of the form 100 in the traveling direction may be detected. Good (if it is one end in the traveling direction of the form 100).

<Fifth Embodiment> Hereinafter, a fifth embodiment according to the present invention will be described with reference to FIGS. 1, 9, and 10. FIG. FIGS. 9 and 10 are views for explaining the fifth embodiment, of which FIG. 9 shows a state in which the form is normally folded, and FIG. 10 shows a state in which the form is defectively folded. FIG.

The folding failure detecting mechanism of the paper folding machine according to the fifth embodiment detects the presence or absence of a form at a position slightly outside a predetermined folded size of the form with the folded form positioned. It is provided with a detecting means for detecting, and when a form is detected by the detecting means, it is determined that the form is defective.

The form 100 that has been folded and folded by the paper folding machine is discharged to a paper output tray 29, and as shown in FIGS. 9 and 10, the form 100 is temporarily located at the front end side in the traveling direction. The form 100 is positioned in contact with the gate (stopper) 40 in the longitudinal direction.

In the fifth embodiment, a sensor (detection means) for detecting the presence or absence of the form 100 at a position slightly before the predetermined folded size of the form 100 with the form 100 positioned as described above. 61 and 62, and sensors (detection means) 63 and 64 for detecting the presence or absence of the form 100 at a position slightly wider than the form width. The detection points by the sensors 61 and 62 are, for example, positions corresponding to the vicinity of both ends of the form 100 in the width direction. The detection points of the sensors 61 and 63 are, for example, positions corresponding to the vicinity of the rear end of the form 100. And form 10
When 0 contacts the gate 40, the sensors 61, 6
2. If the form 100 is detected by any one of the sensors 63 and 64, it is determined to be defective.

Here, the interval between the predetermined folded size of the form 100 and the detection points by the sensors 61, 62, 63, 64 is appropriately adjusted according to the degree of the inclination of the paper fold determined to be defective. . In other words, the narrower the interval between the predetermined folded size of the form 100 in the state where the form 100 is positioned and the detection points of the sensors 61, 62, 63, 64 becomes, the stricter the defect criterion becomes.
The larger the distance between the predetermined folded size of the form 100 in the state where is positioned and the detection points of the sensors 61, 62, 63 and 64, the looser the criteria for the defect.

When the paper folding operation is performed by the paper folding machine having such a configuration, as shown in FIG.
At the time when the leading end of the zero contacts the gate 40, the sensor 6
1, 62, 63, 64, the form 100
Is not detected.

However, for example, as shown in FIG. 10, when the form 100 is folded obliquely, when the leading end of the form 100 contacts the gate 40,
The form 100 is detected by the sensor 61 and the sensor 63. Since this is determined to be defective, it is possible to detect a folding defect in which the top and bottom of the form 100 is folded larger than a predetermined dimension, and a folding defect in which the width of the form 100 is folded larger than the predetermined dimension.

As described above, according to the fifth embodiment of the present invention, when the folded form 100 is positioned, the form 100 at a position slightly outside the predetermined folded size of the form 100 is obtained. Sensor 6 for detecting the presence or absence of
1, 62, 63, 64, and these sensors 61, 6
If the form 100 is detected by 2, 63, 64, it is determined to be defective. Therefore, it is possible to detect a folding defect in which the top and bottom dimensions of the form 100 are larger than a predetermined folding dimension and a folding defect in which the width of the form 100 is larger than the predetermined folding dimension.

In the fifth embodiment, the detecting means (sensor 61, sensor 61) detects the presence or absence of the form 100 at a position slightly before the predetermined folded size of the form 100.
62) and detecting means (sensors 63 and 64) for detecting the presence or absence of the form 100 at a position slightly wider than the form width. However, either one of these detecting means is used. May be. Further, when using the detecting means for detecting the presence or absence of the form 100 at a position slightly before the predetermined folded size of the form 100, the sensors 61 and 62
However, the number of sensors is arbitrary. Further, the detection points of the form 100 by the sensors 61 and 62 are set to positions near both ends in the width direction of the form 100. However, if the position is slightly before the predetermined folded size of the form 100 with respect to the stopper 40, Others may be used (for example, using only one sensor, the detection point of the form 100 by the sensor is set near the center of the form 100 in the width direction).

The folding failure detecting mechanism of the folding machine shown in each of the above embodiments can be used independently.
It is needless to say that the folding failure can be more effectively detected by using them in an appropriate combination.

[0057]

According to the folding defect detecting mechanism for a paper folding machine according to the first aspect of the present invention, there is provided detecting means for detecting the presence or absence of a form at a position slightly wider than the form width of the form transport path,
When a form is detected by this detection means, it is determined that the form is defective, so that skewing of the form can be detected.

According to the folding defect detecting mechanism for a paper folding machine according to the second aspect of the present invention, a slack for forming a fold in the form by forming a fold in the form by being gripped by a roller is formed at the end of the form. Detection means for detecting the presence or absence of a form on the conveyance path leading to a stopper for restricting the operation of the form. If the form to be conveyed is not detected by this detection means, the form is determined to be defective. It is possible to detect that no work is performed.

According to the folding defect detecting mechanism of the paper folding machine according to the third aspect of the present invention, there is provided detecting means for detecting the presence or absence of a form at a plurality of positions arranged in the width direction of the form conveying path. If the difference in the mutual detection time at a plurality of positions by the means exceeds a specified value, it is determined as a defect, so that a skew of the form can be detected.

According to the folding failure detecting mechanism of the paper folding machine according to the fourth aspect of the present invention, there is provided a detecting means for detecting a difference in inclination between the top and the bottom of a form which has been diffracted a plurality of times, and there is a value detected by this detecting means. If the value exceeds the specified value, the form is determined to be defective. Therefore, it is possible to detect a folding defect in which the top and the ground of the form are folded by a certain degree or more.

According to the folding defect detecting mechanism for a paper folding machine according to the fifth aspect of the present invention, the presence or absence of a form at a position slightly outside a predetermined folding size of the form with the folded form positioned. If the form is detected by this detection means, the form is determined to be defective, so the top and bottom dimensions of the form are larger than the predetermined folded size, or the form width is smaller than the predetermined folding size. A folding failure larger than the rising dimension can be detected.

[Brief description of the drawings]

FIG. 1 is a side sectional view illustrating a folding failure detection mechanism of a paper folding machine according to the present invention.

FIG. 2 is a diagram illustrating a state in which a form is normally conveyed for explaining the first embodiment.

FIG. 3 is a diagram showing a state in which a form is skewed for explaining the first embodiment.

FIG. 4 is a diagram showing a state in which a form is normally conveyed for explaining the second and third embodiments.

FIG. 5 is a diagram showing a state in which a form is skewed for explaining a second and a third embodiment;

FIG. 6 is a diagram showing a state in which a form is obliquely folded in a first folding operation to explain a fourth embodiment;

FIG. 7 is a view showing a state in which a form is folded obliquely even in the second folding operation to form the form into a substantially parallelogram in order to explain the fourth embodiment.

FIG. 8 is a diagram showing a state in which a form is folded obliquely even in the second folding operation and the form is substantially trapezoidal, for explaining the fourth embodiment.

FIG. 9 is a diagram showing a state in which a form is normally folded to explain a fifth embodiment.

FIG. 10 is a diagram illustrating a state in which a form is defectively folded in order to explain a fifth embodiment.

FIG. 11 is a diagram showing an example of the structure of a general roller-type paper folding machine.

[Explanation of symbols]

51, 52 sensor (detection means) 8, 9, 10, 11, 12 roller 31, 32, 33, 34 stopper 53, 54, 55, 56, 57, 58, 59, 60 sensor (detection means) 61, 62 sensor (Detecting means) 63, 64 Sensor (Detecting means) 100 forms

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F048 AA00 AB04 BA05 BA08 BA11 BA20 CC01 DB06 3F108 AA01 AB01 AC10 BA03 CC02 EA09 EA14 GA09 GB04 GB10 HA02 HA12

Claims (5)

[Claims] 1. A paper comprising a detecting means for detecting the presence or absence of a form at a position outside the form width of a form transport path, and determining that the form is defective when the detecting means detects the form. Defective folding mechanism of folding machine. 2. A method for detecting the presence or absence of a form in a transport path leading to a stopper for regulating the operation of an end of the form in order to form a slack for forming a fold in the form by being gripped by a roller. A folding failure detection mechanism for a folding machine, comprising: a detection unit; and determining that the form to be conveyed is not detected by the detection unit. 3. A method comprising: detecting means for detecting presence or absence of a form at a plurality of positions arranged in the width direction of a form transport path, wherein a difference between timings of detecting forms at the plurality of positions exceeds a prescribed value. A folding failure detection mechanism for a folding machine, which determines that the folding is defective. 4. When performing the folding operation of a form a plurality of times, the apparatus includes a detecting unit that detects a difference in inclination of the top and bottom of the form that has been diffracted a plurality of times, and when a value detected by the detecting unit exceeds a predetermined value,
A folding failure detection mechanism of a paper folding machine, which is determined to be defective. 5. A detecting means for detecting the presence or absence of the form at a position outside a predetermined fold dimension of the form with the folded form positioned, wherein the form is detected by the detecting means. A folding failure detection mechanism for a paper folding machine, wherein the failure is determined when a failure occurs.