JP5120767B2 - Document shredding machine equipped with a safe paper feeding mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper shredder with a safe paper sheet-inserting mechanism adapted to prevent human damage. <P>SOLUTION: The paper shredder with a safe paper sheet-inserting mechanism has the paper sheet inserting mechanism in which an insertion receiving plate body 6 including an insertion receiving plate portion 6a, a guide receiving plate portion 6b, and a feed receiving plate portion 6c is fixed to a base frame 5, an upper surface swinging guide member 7 is disposed corresponding to the insertion receiving plate portion 6a of the insertion receiving plate body 6 to form an openable/closable insertion port 1, a guide space composing member 8 is disposed corresponding to the guide receiving plate portion 6b to form a guide space passage 2, a feed port composing member 9 is disposed according to the feed receiving plate portion 6c to form a guide feed port 3, and when the upper surface swinging guide member 7 of the insertion port 1 is opened beyond a predetermined interval due to insertion, entanglement, or the like of a foreign object, an opening/closing detection switch 11 detecting the opening is operated to urgently stop the rotation of a shredding cutter 4. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

In the present invention, when a foreign object such as a finger is accidentally inserted into the paper sheet slot of the document shredding machine or carelessly caught, the slot opens more than a specified interval and brakes the driving motor of the shredding cutter. While making an emergency stop, increase the distance from the inlet to the shredding cutter to prevent misinserted foreign matter from reaching the shredding cutter, even if foreign matter is inserted by mistake. The present invention relates to a document shredding machine equipped with a safe paper sheet feeding mechanism that can easily remove a foreign matter and prevent a foreign matter inserted by mistake from being broken or causing a personal injury accident.

The present invention is intended to provide a highly safe document shredding machine that prevents personal injury accidents in particular from among troubles relating to paper sheet slot of various document shredding machines. is there.

Conventionally, troubles and accidents caused by the entry of a large amount of paper sheets exceeding the capacity, troubles and accidents caused by inadvertent entry of foreign objects, and a large amount of paper that has entered as troubles related to the paper sheet inlet of the document shredder There have been troubles and accidents in which leaves and foreign substances clog the slot, and accidents in which a large number of paper sheets and foreign substances that have entered cannot be removed without breaking them as much as possible. However, the most serious trouble is the occurrence of a personal injury accident such as cutting or crushing due to erroneous insertion or entrainment of fingers.

In the industry, various ideas and researches have been made so far in order to prevent such troubles related to the paper input of the document shredder and to realize a safe and easy-to-use input. However, in reality, human injury accidents such as amputation and destruction of fingers are still a social problem. The conventional basic idea for this problem is that the concept of “the paper sheet slot should be narrow enough to prevent fingers and the like from entering” was a common recognition in the industry. The trouble prevention measures related to the paper sheet slot that have been proposed or embodied so far have been designed based on this basic concept. In the following, specific prior examples for preventing a safety problem related to a conventional paper sheet slot will be described.

JP-A-2002-11367 (Prior Example 1) Japanese Patent Laying-Open No. 2004-321993 (Prior Example 2) FIG. 11: Prior Example of the Applicant (Prior Example 3)

In Prior Example 1 (Japanese Patent Laid-Open No. 2002-11367), as shown in FIG. 9, a paper sheet is fed from a slot A and is sent to a cutter B rotating through a guide path C following the slot A and chopped. The paper sheet shredding device is provided with opening width switching means D for switching the opening width of the guide path C in accordance with the moving direction of the paper sheet, with an opening width that allows the paper sheet to pass from the input port side to the cutter side. A paper sheet characterized in that a feed direction opening width d1 of a certain guide path is narrower than a guide width return direction opening width d2 which is an opening width through which paper sheets can pass from the cutter side to the insertion port side. A paper slot for shredded paper has been proposed. The prior invention eliminates the possibility that the user's fingers or the like may accidentally touch the cutter, and can limit the excessive supply of paper sheets to the cutter beyond the maximum number or thickness that can be shredded. It is said that there is an effect that it is possible to safely and easily discharge a paper sheet that has been supplied to and partially shredded from the input port.

  This prior example 1 is an invention of the idea of preventing inadvertent insertion of a user's fingers and foreign objects by setting the opening width in the feed direction of the guide path to be small. However, as for the preceding example 1, when a safety confirmation experiment was performed by inserting the test piece P imitating a finger between two paper sheets from the insertion port, surprisingly, the test piece P Although the thickness dimension was larger than the opening width of the guide path, it was confirmed that the test piece P was easily inserted into the guide path. In other words, even in the case of the preceding example 1, if the insertion method is adopted in which the paper is inserted between the two sheets, the finger is inadvertently intruded and the finger is cut accordingly. It has been found that there is a possibility of causing personal injury accidents such as damage or destruction.

In prior example 2 (Japanese Patent Laid-Open No. 2004-321993), as shown in FIG. 10, the safety shutter mechanism E composed of a rotatable L-shaped plate-like member is inserted in the insertion direction of the shredded object F during normal times. However, after trouble occurred, it was freely rotated in the pulling direction so that the gap between the openings G was widened. As a result, it is possible to prevent intrusion of documents to be shredded and foreign objects exceeding the capacity that causes troubles, thereby ensuring safety. At the same time, if a trouble occurs, it is a document input port of a document shredding machine that facilitates post-processing and ensures safety.

  The prior example 2 is an invention for measures against troubles relating to a paper sheet slot of a document shredder previously developed by the present applicant. When developing the preceding example 2, if the opening width of the inlet is set to be narrow, it is possible to prevent intrusion of a large amount of shredded documents and foreign objects beyond the capacity that can cause trouble, ensuring safety. This technology has been developed based on the idea that it can be done. In fact, when a large amount of shredded documents and foreign objects were to be inserted by a normal method, an object having a size larger than the opening width of the input port did not enter. However, when the size is smaller than the insertion slot at the beginning of insertion, but the size increases from the middle, the paper sheet enters while the thickness is small, but it becomes clogged when the size is large. Was found to happen. If such a trouble that clogs occurs in the middle, the clogged material has been bitten into the inlet by a strong force, so that it cannot be pulled out easily. However, in the prior example 2, when such a trouble occurs, the L-shaped plate-shaped member can be freely pulled out by freely rotating in the pulling direction so that the gap between the openings G is widened, This makes it easy to post-process troubles. In addition, the preceding example 2 is provided with a safety shutter mechanism E at the insertion port, restricts the rotation in the insertion direction, limits the gap at that time to 5 mm to 3 mm, and allows only a predetermined amount of paper sheets to pass. Designed.

Thereafter, the inventor conducted safety confirmation experiments in various modes using the test piece P created by imitating a finger. As a result, when the present inventor performed a method of inserting the test piece P between two sheets of paper and inserting it from the insertion port, the clearance of the safety shutter mechanism E at the insertion port was 3 mm to 5 mm. It was found that the test piece P having a larger dimension could easily enter beyond the safety shutter mechanism E even if it was set narrowly. In addition, it was confirmed that the test piece P that had intruded was greatly deformed and damaged. As described above, in the case of the preceding example 2 as well, it is considered that a dimensionally large object should not enter a smaller slot, and a finger is sandwiched between two sheets of paper. It has been found that the user's fingers cannot be prevented from entering when the throwing-in method is used, and therefore it is not possible to eliminate the human injury accident.

Prior Example 3 (FIG. 11) is an example in which the present applicant has further improved Prior Example 2 developed in-house. As shown in FIG. 11, the preceding example 3 has an L-shaped maximum opening width restricting body H that restricts the maximum number of sheets or maximum thickness that can be shredded on the input side (inlet) of the input port, On the cutter direction supply side (exit) of the input port, there is a shutter part I that is closed during normal times but guides in the direction of the shredding cutter part while being clamped by its own weight when passing the paper. This is the paper slot for the document shredder. That is, the preceding example 3 is characterized in that the sheets fed at two places on the loading side and the cutter supply side are controlled. In the illustrated embodiment, the opening width regulated by the maximum opening width regulating body H is set to 3 mm to 5 mm.

For the preceding example 3 as well, a safety confirmation experiment (FIG. 8) using the test piece P was performed. As a result, as shown in FIG. 11, when the test piece P is inserted in a state of being sandwiched between two sheets even if the dimension is larger than the opening width, the maximum opening width restricting body is easily obtained. It has been found that the test piece P that has entered through the interval regulated by H is greatly deformed. And in the case of the said experiment, it confirmed that the front-end | tip of the test piece P entered 22 mm from the meshing | engagement of the shredding cutter, and has become the state shredded partially. From the results of these experiments, in the case of the preceding example 3, even if the maximum value of the opening width restricted by the fixed maximum opening width restricting body H is 3 mm to 5 mm, which is smaller than the thickness of the test piece, It has been found that the user's fingers cannot be prevented from entering, and that the intrusion distance of foreign objects such as the fingers is larger than expected. In other words, it has been found that not only the measure of narrowing the insertion slot can prevent accidental insertion accidents such as fingers, but also the possibility of significant damage to the fingers in that case.

As described above, all of the preceding examples are provided with various restricting means that do not allow paper sheets exceeding the capacity to be loaded into the paper sheet slot of the document shredding machine. However, according to the results of the safety confirmation experiment using our test piece P (Fig. 11), the restriction of the opening width of the inlet is It has been found that it is impossible to completely prevent accidental insertion of fingers and inadvertent inclusion of foreign objects, and therefore, it cannot prevent serious personal injury accidents.

In recent years, protection of personal information has been demanded, and document shredders have rapidly spread from business use to personal use, and the market has expanded. Along with this, the number of human casualties at the entrance of document shredders has increased rapidly. In particular, if the PL law is applied due to a human injury accident, the manufacturer will be fatally hit. Due to the frequent occurrence of such cases, document shredding machines are required to be safer than ever before.

However, it is indispensable to provide a predetermined gap or opening in the paper input slot of the document shredder, so that more paper than the designed amount may be accidentally inserted into the input slot. It is inevitable that foreign substances other than those will enter by mistake. Also, the usage of the slot is not limited to the case where a person who is familiar with it always tries to cut the paper with the correct usage, but is used in various ways by the operator. In addition, a tie may be inadvertently caught, a part of clothing may be caught, or a child or an infant may accidentally insert a finger. In this way, there are cases where the usage mode exceeds the range assumed by common sense as well as the intended usage mode of operating the document shredding machine. For this reason, it is said that it is a very difficult problem to completely eliminate the human loss accident in the document shredder.

  The present inventor changed the conventional idea of making it difficult for fingers to enter the insertion port there, and configured that the opening width of the insertion port widened in reverse if the finger tried to enter the insertion port, instead of the insertion The idea was that it would be safer to detect when the entrance of the mouth has opened more than the specified amount and to ensure that the cutter for shredding is urgently stopped.

Moreover, when this emergency stop method is adopted, there is a new technical problem that if the shredding speed is high, the retraction becomes large due to inertial rotation from the stop signal until the shredding cutter stops. I understand. In the document shredding machine industry, there is no particular standard or regulation for the shredding speed for each model, but a shredding speed of at least 5-6 m / min or more is required for a shredding speed that does not frustrate the user. is necessary. In that case, it has also been found that paper sheets are greatly drawn in the time from the stop detection signal until the inertial rotation of the shredding cutter is stopped. In the pulling-in experiment by inertia rotation by the applicant's popular type document shredding machine, when the shredding speed is about 8 m / min at 50 Hz, it is 133 mm per second at 60 Hz, and about 156 mm per second at 60 Hz. I got the knowledge that it would be pulled in. When the shredding speed is fast, the pulling is increased by inertial rotation from the stop signal until the shredding cutter stops, so the distance from the inlet to the shredding cutter is sufficient for safety. I also understood that it was necessary to secure. As for the distance from the insertion port to the shredding cutter, the present inventor, the time until the shredding cutter stops from the stop signal in the case of an emergency stop, the data of inertial rotation, the length of fingers of ordinary people, etc. Based on ergonomic data, it was found that the safety can be ensured in most cases if it is at least 50 mm or more. Furthermore, even if a finger is mistakenly inserted together with a paper sheet, when a foreign object such as a finger is to be pulled out, it is necessary that the insertion port is easily opened wide and can be pulled out easily.

The present invention is based on such a new idea and knowledge obtained through experiments, and is designed with sufficient consideration for safety, to reliably prevent human injury accidents at the paper sheet slot of the document shredder. In order to facilitate post-processing, it should be possible to easily pull out and remove any foreign matter that is accidentally inserted or caught. It is intended to embody a document shredding machine equipped with a safe sheet feeding mechanism.

The basic idea of the present invention is to form a paper sheet inlet, followed by a guide space path and a guide sending outlet, and when a paper sheet is inserted from the inlet, the guide space path and the guide following the input slot. A document shredding machine having a paper sheet feeding mechanism capable of cutting a paper sheet by feeding it to a cutting cutter rotating through a delivery port, and the paper sheet feeding mechanism is inserted into a base frame An input receiving plate body composed of a receiving plate portion, a guide receiving plate portion following the receiving plate portion, and a sending receiving plate portion following the receiving plate portion is fixed, and the upper surface is swung so as to correspond to the insertion receiving plate portion of the input receiving plate body. A guide member is provided to provide an openable / closable inlet, and a guide space constituting member is provided to correspond to the guide receiving plate portion to provide a guide space path, corresponding to the delivery receiving plate portion. Thus, the guide delivery port is configured by arranging the delivery port component. The upper surface swing guide member constituting the insertion port is pivotably mounted only in a region where the insertion port side of the insertion port is opened from the normally open position, and is also provided with a normally open position locking stopper and a biasing ridge or attachment. A biasing means comprising a biasing weight and an open / close detection switch are arranged so as to be related to the upper surface swing guide member, and the upper surface swing guide member is inserted into the insertion port by the normally open position locking stopper. During normal times, the load is opened at a specified interval, and when the upper surface swing guide member constituting the insertion port swings in the opening direction by the biasing means, a predetermined load within a range in which safety can be ensured. The guide space path is formed so that an interval space portion larger than a specified interval of the input port is formed from the vicinity of the input port to the middle portion, and a narrower space is formed near the guide outlet. While reaching the guide exit No, the guide outlet is previously formed to deliver the shredding cutter direction while controlling paper sheets have been inserted. In addition, if a large amount of paper sheets is inserted into the insertion slot more than the specified amount, or if foreign matter is inserted or caught in and the top swing guide member of the insertion slot is opened beyond the specified interval, the open / close detection switch This is a document shredding machine equipped with a safe sheet feeding mechanism characterized in that the rotation of the shredding cutter is urgently stopped by detecting operation.

This invention is a basic invention of a document shredding machine provided with a safe paper sheet feeding mechanism according to the present application. From the input side to the shredding cutter side, it can be sent to the shredding cutter that rotates through the paper entry port, the guide space and the guide outlet, and can be shredded. This is a document shredding machine with a high-quality sheet feeding mechanism.

The main part of the present invention is such that the insertion port is constituted by an insertion receiving plate portion and an upper surface swing guide member, and is pivotally attached only in a region where the insertion port side of the insertion port is opened from the normally open position. Configured, the insertion port of the insertion port is always open at a predetermined interval, but when the insertion port swings in the opening direction and the opening width of the insertion port is wider than the specified interval, The open / close detection switch is configured to detect and operate to urgently stop the rotation of the cutter for shredding. That is, if a finger or a foreign object tries to enter the insertion port, the upper surface swing guide member of the insertion port swings in the expanding direction, and if the opening width of the insertion port of the insertion port exceeds a specified interval, it is shredded accordingly. It functions to ensure that the cutter is stopped urgently.

It should be noted that when the upper surface swing guide member constituting the insertion port swings in the opening direction, a predetermined load within a range in which safety can be secured is applied by the biasing means. The “safety range” means that when a paper sheet is inserted, the thickness of the specified amount of the paper sheet cannot be accurately measured due to a malfunction that can be easily opened with a slight stimulus. This means that the load that produces the effect of preventing this is the minimum load, and the load that does not damage human fingers is the maximum load.

  In order to ensure safety, it is necessary to ensure a large distance from the insertion port of the insertion port to the tip of the cutter for shredding, but the present invention has an advantage that it can be realized easily. This is because the upper surface swing guide member can be designed by adjusting its length freely. As a result, the length of the insertion port can be easily adjusted, and as a result, the distance from the insertion port of the insertion port to the cutter for shredding can be adjusted. For this reason, even if it is an existing document shredding machine with a small distance from the insertion port to the tip of the cutting cutter, the upper surface swing guide member is attached in front of the insertion port, and the opening width of the insertion port By installing an open / close detection switch that activates when the sensor is opened more widely than the specified interval, and a controller that urgently stops the rotation of the cutter for shredding by specifying this open / close detection switch, the existing risk is high The document shredding machine can be modified to a document shredding machine having a highly safe paper sheet feeding mechanism according to the present invention.

The guide space path is composed of a guide receiving plate portion of the input receiving plate body and a guide space constituting member, and has a space portion larger than the input port up to an intermediate portion of the guide space path, In the vicinity of, the space is gradually narrowed so as to be guided to the guide outlet. For this reason, in the said guide space path, the paper sheets and foreign matters mistakenly inserted by the space part larger than an insertion port are not carelessly broken, and can be easily pulled out and removed.

The first invention to receive a patent forms a paper sheet inlet, followed by a guide space path and a guide outlet, and when a paper sheet is inserted from the inlet, it is a guide space following the inlet. A document shredding machine having a paper sheet feeding mechanism that can feed a shredder cutter that rotates through a path and a guide feed outlet to shred the paper sheet. An insertion receiving plate body composed of an insertion receiving plate portion, a guide receiving plate portion following it, and a sending receiving plate portion following the insertion receiving plate portion is fixed to the frame so as to correspond to the insertion receiving plate portion of the input receiving plate body. An upper surface swing guide member is provided to provide a freely openable / closable inlet, a guide space constituting member is provided to correspond to the guide receiving plate portion, and a guide space path is provided, to the delivery receiving plate portion. The guide outlet is configured by arranging the outlet outlet components so as to correspond to each other, and the guide outlet Between the shredding cutters in other party, previously disposed prevention device infeed capable closing passage infeed of the sheet by the operation of the opening and closing detection switch. The upper surface swing guide member constituting the insertion port is pivotably mounted only in a region where the insertion port of the insertion port is opened from the normally open position, and is also provided with a normally open position locking stopper and a biasing ridge or attachment. A biasing means comprising a biasing weight and an open / close detection switch are arranged so as to be related to the upper surface swing guide member, and the upper surface swing guide member is inserted into the insertion port by the normally open position locking stopper. During normal times, the load is opened at a specified interval, and when the upper surface swing guide member constituting the insertion port swings in the opening direction by the biasing means, a predetermined load within a range in which safety can be ensured. The guide space path has a space portion larger than the input port from the vicinity of the input port to the intermediate portion, and gradually becomes a narrow space near the guide output port so that the guide space path is guided to the guide output port. Formed and the guide outlet is It is formed a sheet that has been input to deliver the shredding cutter direction. On top of that, a large amount of paper sheets are inserted into the input port more than the specified amount, or foreign matter is inserted or caught, and the upper surface swing guide member of the input port is opened more than the specified interval, and the open / close detection switch detects When activated, the rotation of the shredding cutter is urgently stopped, and the feeding prevention device closes the paper sheet feeding path between the guide outlet and the shredding cutter. Is a document shredding machine equipped with a safe sheet feeding mechanism.

The first invention is based on the basic invention described above , wherein the paper feed passage is prevented from being opened and closed freely by the operation of an open / close detection switch at a position between the guide outlet and the shredding cutter. When the device is installed and foreign matter is inserted or caught in and the slot is opened more than the specified interval, the open / close detection switch activates and stops the rotation of the shredding cutter. The feeding prevention device is different in that the feeding path for paper sheets is closed between the guide delivery port and the cutter for shredding.

Even if the document shredding machine is designed to stop the rotation of the shredding cutter urgently when the rotational speed of the shredding cutter increases, the shredder cutter will stop after the open / close detection switch generates a stop detection signal. It is inevitable that paper will be pulled in before the inertial rotation is stopped. Even in such a case, the present invention is such that the feeding prevention device closes the feeding path of the paper sheet immediately before the cutter for shredding, and the foreign matter is inadvertently mistakenly inserted into the loading slot and drawn in. In other words, it prevents the fingers from reaching the cutter for shredding, and prevents serious accidents such as chopping damage to foreign objects and fingers. The present invention is a safety ensuring measure in which the safety measure according to the first invention is applied and the foreign material and fingers inserted by mistake are not allowed to reach the shredding cutter.

In the second invention to be patented, the cutter motor is equipped with a braking means such as a mechanical brake or an electric brake, and a brake circuit is provided in the cutter motor drive unit, which is larger than a prescribed amount. When the paper sheet is inserted, foreign matter is inserted or caught, and the upper surface swing guide member of the slot is opened beyond the specified interval, and the open / close detection switch is activated, the cutter motor drive The braking circuit is activated and braking force is applied by braking means such as a mechanical brake or an electric brake to stop the shredding cutter from rotating instantaneously and prevent inertial rotation from occurring as much as possible. A document shredding machine provided with a safe sheet feeding mechanism according to the first aspect of the present invention.

As described above, when the rotation speed of the shredding cutter is increased in the document shredding machine, even if the shredding cutter is designed to stop rotating urgently, the open / close detection switch generates a stop detection signal. There is a technical problem that papers are drawn in until the inertial rotation of the shredding cutter is stopped. The second invention is an invention that solves this technical problem. When it is detected that the open / close detection switch is widened more than the specified interval, the braking circuit of the cutter motor drive is activated, and the braking force is applied by the braking means such as mechanical brake or electrical brake. The feature is that the rotation of the cutter is stopped instantaneously so that inertial rotation does not occur as much as possible.

The third aspect of the invention to be patented is the safety described in the first aspect of the invention, wherein the distance from the inlet of the paper sheet inlet to the tip of the shredding cutter is secured at least 50 mm. This is a document shredding machine equipped with a paper feeding mechanism.

The third invention is characterized in that the distance from the inlet of the paper sheet inlet to the tip of the shredding cutter is designed to be at least 50 mm. This is because the open / close detection switch has a stop detection signal. The distance is set by calculating that the safety can be ensured if the paper is drawn in the time from when the chopping cutter is stopped until the inertial rotation of the shredding cutter is stopped. The distance from the insertion port of the insertion port to the tip of the chopping cutter is the shortest distance on the circumference of the cutting edge of the chopping cutter from the specified interval portion of the insertion port for inserting paper sheets, It is not the distance to the meshing point of the shredding cutter. 50mm or more is determined from the ergonomic standpoint as the minimum distance that can ensure safety by referring to the length of the infant's finger and the distance drawn by inertial rotation at the time of emergency stop with reference to the test finger test results. It is a thing. In the case of the applicant, the distance and the standard are set to 50 mm or more for the small personal type and 80 mm or more for the large floor type.

According to a fourth aspect of the present invention, a base frame includes, together with the opening / closing detection switch of the insertion port, a control board including a loading port paper presence / absence switch, a control unit, a motor driving unit, and a DC power source unit, and an operation board. And are configured so that they can be connected to and controlled by the control unit of the control board. On top of that,
(1) Use the opening / closing detection switch for the slot and the paper slot presence / absence switch to monitor the condition of the slot at normal times.
(2) When it is detected by the opening / closing detection switch of the insertion port that the insertion port is open, the motor drive unit can be prevented from rotating the shredding cutter in a forward direction by a command from the control unit.
(3) When it is detected by the opening / closing detection switch of the insertion port that the insertion port is closed, the motor drive unit rotates the cutter for normal cutting according to the operation command from the operation board according to the command from the control unit. So that you can
(4) If the open / close detection switch detects that the input port has been opened more than the specified interval during shredding due to the normal rotation of the shredding cutter according to the operation command from the operation board, use the input port paper presence / absence switch. , Detect if there is any paper at the slot,
(5) When the insertion port paper presence / absence switch detects that there is no paper sheet, the motor drive unit makes an emergency stop of the shredding cutter in response to a command from the control unit,
(6) If the insertion slot paper presence / absence switch detects that there is paper, the motor drive unit stops the shredding cutter in response to a command from the control unit, and then reversely rotates the shredding cutter. To spit out the paper.
The present invention is characterized in that the rotation control of the cutter for shredding (1) to (6) is performed by the detection operation of the opening / closing detection switch of the insertion port and the insertion port paper presence / absence switch as described above. 1 is a document shredding machine provided with a safe sheet feeding mechanism described in the invention.

The fourth invention is a document shredding machine provided with a paper sheet feeding mechanism in which the rotation control of the shredding cutter is controlled by the detection operation of the opening / closing detection switch and the paper slot presence / absence switch. The insertion opening / closing detection switch detects erroneous insertion of paper sheets or foreign objects exceeding the specified amount, and the detection of the insertion slot paper presence / absence switch detects the presence of paper sheets in the paper sheet input mechanism. Then, the document shredding operation is performed in which the safety is ensured by controlling the rotation of the shredding cutter based on this information.

The present invention is formed of a paper sheet inlet, followed by a guide space path and a guide outlet, and when a paper sheet is inserted into the inlet, it rotates through a guide space path and a guide outlet after the inlet. This is a document shredding machine having a paper sheet feeding mechanism that can be fed to a shredding cutter and shredded paper sheets. The insertion slot is constituted by an insertion receiving plate part and an upper surface swing guide member. However, it is configured so that it can pivot freely only in the region opened from the normally open position, and the insertion port is always opened at a predetermined interval, but in the direction in which the insertion port opens. When the swinging and the opening width of the insertion opening is widened more than a predetermined interval, the open / close detection switch is detected and actuated to urgently stop the rotation of the shredding cutter.

That is, the safety ensuring method of the present invention does not prevent fingers or foreign objects from entering the insertion slot, but immediately detects when fingers or foreign objects have entered the insertion slot and immediately stops the shredding cutter, It was designed to prevent further intrusion and prevent accidents. In order to ensure safety while permitting partial intrusion, immediately detect the intrusion of foreign matter, secure a wide space so that the intruded part is not damaged, and increase the distance from the inlet to the shred cutter It is necessary to ensure that the rotation of the cutter for shredding is urgently stopped (stops without inertial rotation as much as possible).

The present invention detects immediately when a foreign object enters the inlet of the input port and the opening width is widened more than a specified interval, and the rotation of the shredding cutter is stopped urgently. Since the moving guide member is formed long in the loading direction and the distance from the loading port to the guide space path can be adjusted, it is easy to ensure a large distance (50 mm or more) from the loading port to the shredding cutter. In addition, the guide space path can form an interval space portion that is larger than the specified interval of the input port from the vicinity of the input port to the middle portion, so that the invading foreign matter is not crushed or damaged. In addition, a feed prevention device that can close the paper feed path by operating the open / close detection switch is provided at a position between the guide feed outlet and the shredding cutter. When the insertion port is opened more than the specified interval due to being inserted or caught, the open / close detection switch is activated to stop the rotation of the shredding cutter, and the feeding prevention device is connected to the guide feeding port. It is also possible to prevent the invading fingers and foreign matter from reaching the shredding cutter by closing the paper sheet feeding passage with the shredding cutter.

As described above, the present invention allows a finger or a foreign object to enter the slot, but immediately detects the entry and immediately stops the rotation of the shredding cutter so that the finger and the foreign object do not reach the shredding cutter. At the same time, by adopting a configuration that does not damage the fingers and foreign matter that have entered, safety can be reliably ensured.

The present invention is formed of a paper sheet inlet 1, a guide space path 2 that follows it, and a guide outlet 3, and when a paper sheet is inserted from the inlet 1, a guide space path 2 that continues to the paper inlet 1. The present invention relates to a document shredding machine having a paper sheet feeding mechanism A that can be fed to a shredding cutter 4 that rotates through a guide feed outlet 3 and shreds the paper sheet.

The paper sheet feeding mechanism A is fixed to the base frame 5 with a loading receiving plate body 6 including an insertion receiving plate portion 6a, a guide receiving plate portion 6b following it, and a sending receiving plate portion 6c following the insertion receiving plate portion 6a. An upper surface swing guide member 7 is provided so as to correspond to the insertion receiving plate portion 6a of the input receiving plate body 6 to form an openable / closable input port 1, and guides corresponding to the guide receiving plate portion 6b. The space-constituting member 8 is provided as the guide space path 2, and the guide-outlet 3 is configured by disposing the outlet-outlet-constituting member 9 so as to correspond to the delivery receiving plate portion 6c.

The upper surface swing guide member 7 constituting the input port 1 is pivotally attached to the base frame 5 so as to be swingable only in the region where the insertion port of the input port 1 is opened from the normally open position. 7 is provided with a pivoting portion 7b serving as a fulcrum for rotation at the base thereof, and an insertion port 7c is formed at the distal end portion of the swing base material 7b, and an urging means is provided at the pivot portion of the swing base material 7a. 7d is provided. Further, in the figure, reference numeral 10 denotes a normally open position locking stopper. When the swing base 7a is locked to the normally open position locking stopper 10, the specified interval 3 to 6 mm as designed in the normal time is provided. So that it is open.

The upper surface swing guide member 7 is provided with an open / close detection switch. When the upper surface swing guide member 7 swings and the insertion port 7c is opened beyond a specified interval, the open / close detection switch 11 is turned on. It is comprised so that detection may be activated. Further, the upper surface swing guide member 7 is configured so that the charging port 1 is opened at a designed predetermined interval by the normal time normally open position locking stopper 10 and the charging port 7 is configured by the biasing means 7d. When the upper surface swing guide member 7 swings in the opening direction, a predetermined load within a range in which safety can be ensured is applied.

The guide space 2 has an interval space larger than the input port 1 and is formed so as to be gradually narrowed near the guide delivery port 3 to be guided to the guide delivery port 3.

Further, the guide outlet 3 is formed so that the inserted paper sheet can be sent out while being guided in the direction of the cutter 4 for shredding.

A large amount of paper sheets or a foreign matter is inserted into the insertion port 1 or a foreign object is inserted or rolled up, and the insertion port 7c of the insertion port 1 opens the upper surface swing guide member 7 beyond a predetermined interval. Is a document shredding machine equipped with a safe sheet feeding mechanism A, wherein the opening / closing detection switch 11 detects and operates to stop the rotation of the shredding cutter 4 in an emergency.

A document shredding machine equipped with a safe paper sheet slot mechanism according to the present invention will be described in detail based on the illustrated embodiment. FIG. 1 is a longitudinal sectional view showing a principal part of an embodiment of a document shredding machine equipped with a safe paper sheet feeding mechanism according to the present invention, and FIG. 2 is a diagram showing a safe paper sheet feeding system according to the present invention. FIG. 3 is a longitudinal sectional view showing a principal part of another embodiment of a document shredding machine equipped with a mechanism, and FIG. 3 is another embodiment of a document shredding machine equipped with a safe paper sheet feeding mechanism according to the present invention. FIG. 4 is a longitudinal sectional view of the main part of the document shredding machine in which the upper surface swing guide member constituting the insertion port is opened at a regular interval during normal times, and FIG. 4 is a diagram illustrating the safe paper shown in FIG. It is an example of a document shredding machine equipped with a leaf throwing mechanism, and is a main part longitudinal section diagram showing a document shredding machine in which the upper surface swing guide member constituting the slot is completely open. FIG. 5 is a longitudinal sectional view of a main part showing a state in which a safety confirmation experiment is performed using the document shredding machine having the safe paper sheet feeding mechanism shown in FIG. A. FIG. 6 is a longitudinal sectional view of a main part showing an embodiment of a document shredding machine equipped with a safe paper sheet feeding mechanism according to the second invention, and FIG. 7 is a safe paper according to the fifth invention. FIG. 8 is an electrical block diagram to be mounted on a document shredding machine equipped with a sheet feeding mechanism, and FIG. 8 shows an embodiment of a document shredding machine equipped with a safe paper sheet feeding mechanism according to the fifth invention. It is a flowchart which shows rotation control of the opening and closing and cutter for shredding. FIG. 9 is a longitudinal sectional view showing a preceding example 1 of an input port of a conventional document shredder, and FIG. 10 is a longitudinal sectional view showing a preceding example 2 of an inlet of a conventional document shredder. is there.
Further, FIG. 11 is a longitudinal configuration diagram showing an abnormal state as a result of conducting a safety confirmation experiment using the safety paper sheet slot mechanism of the document shredding machine of the preceding example 3.

FIG. 1 is a longitudinal sectional view of a main part showing an embodiment of a document shredding machine equipped with a safe paper sheet feeding mechanism according to the first invention, and FIGS. 2 and 3 show safety according to the first invention. It is a principal part longitudinal section block diagram which shows the other Example of the document shredding machine provided with the simple paper sheet injection | throwing-in mechanism.

These basic configurations of the present invention are formed by a paper sheet inlet 1, followed by a guide space path 2 and a guide outlet 3. When a paper sheet is introduced from the inlet 1, the paper inlet 1 is continued. This is a document shredding machine having a paper sheet feeding mechanism A capable of being shredded by being sent to a shredding cutter 4 that rotates through a guide space 2 and a guide delivery port 3.

The paper sheet feeding mechanism A is fixed to the base frame 5 with a loading receiving plate body 6 including an insertion receiving plate portion 6a, a guide receiving plate portion 6b following it, and a sending receiving plate portion 6c following the insertion receiving plate portion 6a. An upper surface swing guide member 7 is provided so as to correspond to the insertion receiving plate portion 6a of the input receiving plate body 6 to form an openable / closable input port 1, and guides corresponding to the guide receiving plate portion 6b. The space-constituting member 8 is provided to form the guide space path 2, and the guide-outlet 3 is configured by disposing the outlet-outlet component 9 so as to correspond to the delivery receiving plate portion 6c.

The upper surface swing guide member 7 constituting the insertion port 1 is pivotally attached to the base frame 5 so as to be swingable only in a region where the insertion port 7c of the insertion port 1 is opened from the normally open position. The upper surface swing guide member 7 is provided with a pivoting portion 7b serving as a fulcrum for rotation at the base of the swing base material 7a, and corresponds to the insertion receiving plate portion 6a at the tip of the swing base material 7b. An insertion port 7c is formed, through which paper sheets can easily enter, and an urging ridge is provided as an urging means 7d on the pivoting portion of the swing base material 7a. Further, in the figure, reference numeral 10 denotes a normally open position locking stopper. When the swing base 7a is locked to the normally open position locking stopper 10, the insertion port 7c of the insertion port 1 is defined as designed during normal times. Make sure to open at intervals. In this example, the specified interval was set to 3 mm. This is because the present embodiment is a personal small machine, and it is sufficient that about 30 sheets can be inserted. In the case of a commercial machine, since the amount of processing increases, it is required to set the specified interval to 5 to 6 mm so that 50 to 60 sheets can be inserted simultaneously. .

In the figure, reference numeral 11 denotes an open / close detection switch arranged so as to be related to the upper surface swing guide member 7, which swings the upper surface swing guide member 7 and opens the insertion port 7c beyond a specified interval. At this time, the open / close detection switch 11 is configured to perform detection. Further, the upper surface swing guide member 7 is brought into a state in which the insertion port 7c of the insertion port 1 is opened at the designed specified interval by the normal-time normally open position locking stopper 10, and is inserted by the urging means 7d. When the upper surface swing guide member 7 constituting the mouth 1 swings in the opening direction, a predetermined load within a range in which safety can be ensured is applied. Here, the “predetermined load within a range that can ensure safety” means that when inserting a paper sheet, it prevents a malfunction that can be easily opened with a slight stimulus, and the provision of the paper sheet is substantially established. This means that the load that enables accurate measurement of the thickness of the quantity is the minimum load, and the load that does not damage human fingers is the maximum load.

The guide space 2 has an interval space larger than the input port 1 and is formed so as to be gradually narrowed near the guide delivery port 3 to be guided to the guide delivery port 3. For this reason, even if a foreign object such as a finger accidentally enters the guide space 2, the gap is larger than the insertion port 1, so there is almost no possibility of being crushed or damaged. .

Further, the guide outlet 3 is formed so that the inserted paper sheet can be sent out while being guided in the direction of the cutter 4 for shredding.

In the case of the first embodiment, the paper sheet feeding mechanism A is configured so that the distance from the loading slot 1 to the shredding cutter 4 is about 50 cm.
Therefore, when a large amount of paper sheets are inserted into the insertion port 1 or more than the specified amount, or when foreign matter is inserted or caught and the upper surface swing guide member 7 of the insertion port 1 is opened beyond the specified interval. An embodiment of a document shredding machine equipped with a safe sheet feeding mechanism A, in which the open / close detection switch 11 is detected and the rotation of the shredding cutter 4 is urgently stopped. It is.

In the first embodiment, an electrical block as shown in FIG. The electrical block is provided with a control board 15 including a control unit (MPU) 13, a motor drive unit 14, and a DC power supply unit 22. The control unit 13 of the control board 15 includes an operation board 16 and an open / close detection. The switch 11 is connected to the insertion sheet presence / absence switch 12, and the chip full detection switch 17 and the door opening / closing detection switch 18 are further connected. The control unit 13 is connected to a cutter motor 20 via a motor drive unit 14, and includes the operation board 16, opening / closing detection switch 11, loading paper presence / absence switch 12, chip fullness detection switch 17, door opening / closing detection. When a signal is generated from the switch 18 or the like, the signal is controlled by the control unit 13, whereby the motor driving unit 14 is controlled and driven, thereby controlling the operation of the cutter motor 20. Although not shown, the cutter motor 20 is equipped with a braking means such as a mechanical brake or an electrical brake (not shown), and the motor drive unit 14 is provided with a braking circuit 19.

Then, a large amount of paper sheets more than a predetermined amount are inserted into the input port 1 or foreign matter is erroneously inserted or caught, and the upper surface swing guide member 7 constituting the input port 1 is opened beyond the specified interval. When the open / close detection switch 11 is detected and actuated, the braking circuit 19 of the motor drive unit 14 is activated, and a braking force is generated by a braking means such as a mechanical brake or an electric brake to rotate the cutter 4 for shredding. It stops immediately and prevents inertial rotation as much as possible.

FIG. 2 is a longitudinal sectional view showing a principal part of a second embodiment of a document shredding machine equipped with a safe sheet feeding mechanism according to the first invention. Also in the case of the second embodiment, the basic structure of the paper sheet feeding mechanism X capable of shredding paper sheets is composed of a loading port 1, a guiding space path 2 and a guiding feed port 3 that follow. This point is common to the first embodiment of FIG. Further, the structure of the insertion receiving plate body 6 including the insertion receiving plate portion 6a, the following guide receiving plate portion 6b, and the subsequent receiving receiving plate portion 6c, the upper surface swing guide member 7 constituting the insertion port 1, the guide The structure of the guide space constituting member 8 constituting the space path 2 and the structure of the delivery outlet constituting member 9 constituting the guide delivery outlet 3 are also common to the first embodiment of FIG. Therefore, the common numbers described in FIG. 2 are the same constituent members.

In the second embodiment, the specified interval of the insertion port 7c formed in the insertion port 1 is set to 4 mm. In the case of the second embodiment, the paper sheet input mechanism A is configured so that the distance from the input port 1 to the shredding cutter 4 is about 58 mm.

The second embodiment differs from the first embodiment shown in FIG. 1 in the shape of the upper surface swing guide member 7 and in that the biasing means 7d is configured by a biasing weight. . That is, the upper surface swing guide member 7 is provided with a pivoting portion 7b serving as a fulcrum for rotation at the base of the swing base material 7a, and the tip of the swing base material 7a corresponds to the insertion receiving plate portion 6a. It is bent upward so as to form an insertion slot 7c into which paper sheets can easily enter, and a pivot portion 7b is formed at the base of the swing base material 7a. An urging weight is provided as the urging means 7d.

Further, in the figure, reference numeral 10 denotes a normally open position locking stopper, and the biasing weight 7d portion of the swing base material 7a is locked to the normally open position locking stopper 10 so that the insertion port 1 is designed during normal times. It is in the state opened at the specified interval as described. In the second embodiment, the opening at the specified interval of the insertion port 7c formed in the insertion port 1 is set to 6 mm between the swing base material 7a and the insertion receiving plate 6a, and the biasing weight 7d. And the insertion receiving plate 6a is set to 3 mm. In addition, an open / close detection switch 11 is arranged so as to be related to the upper surface swing guide member 7, and when the upper surface swing guide member 7 swings and opens more than a predetermined interval, the open / close detection switch 11 performs a detection operation. This is the same as the first embodiment of FIG. In the case of the second embodiment, the paper sheet input mechanism X is configured so that the distance from the input port 1 to the shredding cutter 4 is about 85 cm.

The guide space 2 is formed with an interval space larger than the inlet 1 from the vicinity of the inlet 1 to the middle, and gradually narrower so as to guide to the guide outlet 3 near the guide outlet 3. The formation is the same as in the embodiment of FIG. For this reason, even when a foreign object such as a finger accidentally enters the guide space 2, it is not inadvertently crushed or damaged by the space portion larger than the insertion port 1.

Further, the structure of the guide delivery port 3 is common in that the inserted paper sheet is formed so as to be fed out while being guided in the direction of the cutter 4 for shredding. Furthermore, when a large quantity of paper sheets is inserted into the insertion port 1 or more than the specified amount, or when foreign matter is inserted or caught in and the upper surface swing guide member 7 of the insertion port 1 is opened beyond the specified interval. 1 is the same as that of the first embodiment of FIG. 1 in that the opening / closing detection switch 11 detects and operates to stop the rotation of the cutter 4 for emergency.

FIG. 3 is a third embodiment of a document shredding machine equipped with a safe paper sheet feeding mechanism according to the present invention. Also in the case of the third embodiment, the basic structure of the paper sheet feeding mechanism X capable of shredding paper sheets is composed of a loading port 1, a guiding space path 2 and a guiding feed port 3 that follow. This point is common to the embodiment of FIG. Further, the structure of the insertion receiving plate body 6 including the insertion receiving plate portion 6a, the following guide receiving plate portion 6b, and the subsequent receiving receiving plate portion 6c, the upper surface swing guide member 7 constituting the insertion port 1, the guide The structure of the guide space constituting member 8 constituting the space path 2 and the structure of the delivery outlet constituting member 9 constituting the guide delivery outlet 3 are also common to the embodiment of FIG. Therefore, the numbers shown in FIG. 3 are the same as those in the first embodiment.

The difference from the configuration of the first embodiment shown in FIG. 1 is the shape of the upper surface swing guide member 7, and the biasing means 7d is configured by a biasing weight. This is the same as in the second embodiment. Further, since the third embodiment is for business use, the upper surface swing guide member 7 has a large length dimension. In the third embodiment, the specified interval between the insertion ports 7c formed at the insertion port is set to 4 mm, and the distance from the insertion port 1 to the shredding cutter 4 is designed to be about 107 mm.

In addition, the structural difference between this embodiment is that the opening / closing detection switch 11 is mounted on the insertion receiving plate body 6 and the delivery outlet constituting member 9 constituting the guidance delivery outlet 3 is configured in a guide shutter system. In this case, the invaded paper sheet is fed from the guide space path 2 to the direction of the shredding cutter 4 that rotates through the guide shutter. Note that reference numeral 12 in FIG. 3 denotes a paper slot presence / absence switch attached to the delivery port component 9.

FIG. 4 is a longitudinal sectional view of the main part of the third embodiment shown in FIG. 3 showing a document shredding machine that swings in a state where the upper surface swing guide member 7 constituting the insertion port 1 is completely opened. is there. FIG. 5 shows a state where a safety confirmation experiment is performed using a test piece P imitating a finger in the document shredding machine having the safe paper sheet feeding mechanism of the third embodiment shown in FIG. It is a principal part longitudinal block diagram. 4 and FIG. 5 is an embodiment of the same invention as FIG. 3, and the description of the numbers is omitted here.

FIG. 6 is a longitudinal sectional view showing a principal part of a fourth embodiment of a document shredding machine provided with a safe paper sheet feeding mechanism X according to the second invention. In the fourth embodiment, a feeding prevention device 21 that can freely open and close the feeding path of paper sheets is additionally provided in the second embodiment, and a larger amount of paper sheets than a prescribed amount is inserted, When the top surface swing guide member 7 of the insertion port is opened more than the specified interval due to insertion or entrainment of foreign matter and the open / close detection switch 11 is detected and actuated, the rotation of the cutter 4 is urgently stopped, The infeed prevention device 21 includes a safe sheet feeding mechanism X characterized in that the sheet feeding path is closed between the guide delivery port 3 and the shredding cutter 4. The document shredding machine is embodied. Accordingly, the configuration of the paper sheet feeding mechanism X other than the feeding prevention device 21 is the same as that of the second embodiment, and a detailed description thereof will be omitted.

FIG. 7 is an electrical block diagram provided in a document shredding machine equipped with a safe paper sheet feeding mechanism X according to the fifth aspect of the present invention. This is because a control board 15 comprising a control unit 13, a motor drive unit 14 and a DC power source unit 22 is connected to at least the operation board 16, the open / close detection switch 11 and the loading paper sheet presence / absence switch 12, and this is further used for shredding. The cutter motor 20 is connected to the cutter motor 20 of the cutter, and the cutter motor 20 is controlled by signals transmitted from the operation board 16, the open / close detection switch 11, and the insertion slot paper presence / absence switch 12.

FIG. 8 shows an embodiment of a document shredding machine equipped with a safe paper sheet feeding mechanism X according to the fifth invention and further equipped with an electrical block as shown in FIG. 4 is a flowchart showing rotation control of the cutter 4. By using the document shredding machine provided with the electrical block as shown in FIG. 7, the rotation control in the shredding cutter 4 of the document shredding machine according to the present invention can be variously performed as follows. .

(1) It is possible to monitor the state of the insertion slot 1 during normal times by the opening / closing detection switch 11 and the insertion slot paper presence / absence switch 12 of the insertion slot 1.
(2) When it is detected by the opening / closing detection switch 11 of the insertion port 1 that the insertion port 1 is open, the motor drive unit 14 is prevented from operating the shredding cutter 4 in a normal rotation by a command from the control unit 13. To do.
(3) When it is detected by the opening / closing detection switch 11 of the insertion port 1 that the insertion port 1 is closed, the motor drive unit 14 operates the shredding cutter 4 from the operation board 16 according to a command from the control unit 13. It can rotate forward and shred according to the command.
(4) When the opening / closing detection switch 11 detects that the insertion slot 1 is opened more than a predetermined interval during shredding due to the normal rotation of the shredding cutter 4 in accordance with an operation command from the operation board 16, the insertion slot is further opened. A paper presence / absence switch 12 detects whether or not a paper sheet is present in the insertion slot 1.
(5) When the insertion port paper presence / absence switch 11 detects that there is no paper sheet, the motor drive unit 14 causes the shredding cutter 4 to stop urgently in response to a command from the control unit 13.
(6) When the insertion port paper presence / absence switch 11 detects the presence of paper sheets, the motor drive unit 14 urgently stops the shredding cutter 4 in response to a command from the control unit, and then the shredding cutter 4 Rotate to reverse the paper sheet. The present invention can smoothly perform post-processing even if there is an inadvertent entry accident at the inlet 1 as described above.
As described above, the rotation control of the shredding cutter 4 of (1) to (6) is controlled by the detection operation of the opening / closing detection switch 11 of the insertion slot 1 and the insertion slot paper presence / absence switch 12. This is a document shredding machine equipped with a sheet feeding mechanism.

  As shown in FIG. 5, the inventors conducted a safety test of the input port of the document shredding machine and confirmed its safety. The safety test for the insertion slot is to create a test piece P that imitates a finger, and assume the wrong insertion of the finger into the insertion slot 1 and carry out the following test to ensure that there is no risk of personal injury. Is to confirm.

<Test method>
(1) The test piece P has the same shape as the test finger TF-160 defined by UL-1026 / 1012/112/1492.
(2) The test piece P is made of NBR (nitrile rubber) Hs65 as the material and hardness.
(3) The paper type is fine paper (64 g / m ² ) A4.
(4) The insertion angle is the angle at which entry is easiest.
(5) The test piece P is sandwiched and put into shredded paper. The number of shredded sheets with the test piece P sandwiched between them is made equal in the vertical direction.
(6) The number of shreds is two, the rated shred number, and the maximum shred number.
<Judgment>
The test piece P does not reach the shredding cutter as a pass criterion.
It is confirmed that the test piece P is easily pulled out when it is sandwiched in the insertion port.

It is a principal part longitudinal block diagram which shows one Example of the document shredding machine provided with the safe paper sheet injection | throwing-in mechanism which concerns on this invention. It is a principal part longitudinal block diagram which shows the other Example of the document shredding machine provided with the safe paper sheet injection | throwing-in mechanism which concerns on this invention. Another embodiment of a document shredding machine equipped with a safe paper sheet feeding mechanism according to the present invention, in which the upper surface swing guide member constituting the loading slot is opened at a regular interval during normal times. It is a principal part vertical block diagram of a shredder. FIG. 3 is an embodiment of a document shredding machine having a safe paper sheet feeding mechanism shown in FIG. 3, and the document shredding machine in which the upper surface swing guide member constituting the feeding slot is completely opened. It is a principal part longitudinal block diagram which shows these. It is a principal part longitudinal block diagram which shows the state which performed the safety confirmation experiment using the document shredding machine provided with the safe paper sheet injection | throwing-in mechanism shown in FIG. It is a principal part longitudinal block diagram which shows the Example of the document shredding machine provided with the safe paper sheet injection | throwing-in mechanism which concerns on 2nd invention. It is an electrical equipment block diagram with which it mounts | wears with the document shredding machine provided with the safe paper sheet injection | throwing-in mechanism which concerns on 5th invention. It is a flowchart which shows opening / closing of the insertion port which shows the Example of the document shredding machine provided with the safe paper sheet feeding mechanism based on 5th invention, and rotation control of the cutter for shredding. It is a vertical block diagram which shows the prior example 1 of the inlet of the conventional document shredding machine. It is a vertical block diagram which shows the prior example 2 of the insertion port of the conventional document shredding machine. FIG. 11 is a longitudinal sectional view showing an abnormal state as a result of conducting a safety confirmation experiment using the safety paper sheet slot mechanism of the document shredding machine of the preceding example 3.

1: input slot 2: guide space path 3: guide outlet 4: cutting cutter 5: base frame 6: input port receiving plate 6a: insertion receiving plate 6b: guide receiving plate 6c: sending receiving plate 7 : Upper surface swing guide member 7a: swing base material 7b: pivoting portion 7c: insertion port portion 7d: biasing means 8: guide space constituting member 9: delivery outlet constituting member 10: normally open position locking stopper 11: opening and closing Detection switch 12: loading paper presence / absence switch 13: control unit (MPU)
14: Motor drive unit 15: Control board 16: Operation board 17: Chip full detection switch 18: Door open / close detection switch 19: Braking circuit 20: Cutter motor 21: Feed prevention device unit 22: DC power supply unit A: Input port B: Cutter C: Guide path D: Opening width switching means E: Safety shutter mechanism F: Shredded object G: Opening part H: Maximum opening width restricting body I: Shutter part P: Test piece

Claims (4)

Forms a paper sheet inlet, a guide space path and a guide outlet that follow, and when a paper sheet is input from the inlet, it is chopped to rotate through the guide space path and the guide outlet. A document shredding machine having a paper sheet feeding mechanism that can be sent to a cutter for cutting and shredding paper,
The paper sheet feeding mechanism is configured to fix a loading receiving plate body including an insertion receiving plate portion, a guide receiving plate portion that follows the insertion receiving plate portion, and a sending receiving plate portion that follows the insertion receiving plate portion, and insert the loading receiving plate body. An upper surface swing guide member is provided so as to correspond to the receiving plate portion to form an openable / closable opening, and a guide space constituting member is provided to correspond to the guide receiving plate portion to provide a guide space path. As well as configuring the guide delivery port by arranging the delivery port component so as to correspond to the delivery receiving plate part,
Between the guide sending outlet and the cutter for shredding, a feeding prevention device capable of closing the feeding path of the paper sheets by the detection operation of the opening / closing detection switch is arranged,
The upper surface swing guide member constituting the insertion port is pivotably mounted only in a region where the insertion port side of the insertion port is opened from the normally open position, and is also provided with a normally open position locking stopper and a biasing ridge or attachment. A biasing means comprising a biasing weight and an open / close detection switch are arranged so as to be related to the upper surface swing guide member, and the upper surface swing guide member is inserted into the insertion port by the normally open position locking stopper. During normal times, the load is opened at a specified interval, and a predetermined load within a range in which safety can be ensured when the upper surface swing guide member constituting the input port swings in the opening direction by the biasing means. Not to take,
The guide space path is formed from the vicinity of the inlet to the middle portion so as to form an interval space larger than the specified interval of the inlet, and to be gradually narrower near the guide outlet, to the guide outlet. The guide outlet is formed so as to send out the inserted paper sheets in the direction of the shredding cutter,
A large amount of paper sheets were inserted into the input port more than the specified amount, or foreign matter was inserted or caught in, and the upper surface swing guide member of the input port was opened more than the specified interval, and the open / close detection switch was activated. When the rotation of the cutter for cutting is urgently stopped, the feeding prevention device closes the feeding path of the paper sheet between the guide outlet and the cutter for cutting. Document shredding machine equipped with a safe paper feeding mechanism. The cutter motor is equipped with a braking means such as a mechanical brake or an electric brake, and a brake circuit is provided in the motor drive unit.
An open / close detection switch that opens more than the specified interval at the entrance of the top-swing guide member that forms a slot when a large amount of paper is inserted into the slot, or a foreign object is inserted or caught. Is detected and actuated, the braking circuit of the cutter motor drive unit is activated, and braking force is generated by a braking means such as a mechanical brake or an electric brake to instantaneously stop the rotation of the cutter for shredding, 2. A document shredding machine equipped with a safe sheet feeding mechanism according to claim 1, wherein inertial rotation is prevented from occurring as much as possible. 2. A document sheet having a safe sheet feeding mechanism according to claim 1, wherein the distance from the insertion slot of the sheet feeding slot to the tip of the shredding cutter is secured to 50 mm or more. Breaker. The base frame is provided with a paper slot presence / absence switch and an operation board in addition to the opening / closing detection switch of the paper inlet, and these are connected to a control board and a control part comprising a control part, a motor drive part and a DC power supply part. And configured to be controlled by the control unit,
(1) Use the opening / closing detection switch for the slot and the paper slot presence / absence switch to monitor the condition of the slot at normal times.
(2) When it is detected by the opening / closing detection switch of the insertion port that the insertion port is open, the motor drive unit is prevented from rotating the shredding cutter in a forward direction by a command from the control unit.
(3) When it is detected by the opening / closing detection switch of the insertion port that the insertion port is closed, the motor drive unit rotates the cutter for normal cutting according to the operation command from the operation board according to the command from the control unit. No,
(4) When the opening / closing detection switch detects that the cutter has been rotated forward in accordance with the operation command from the operation board and the slot has been opened more than the specified interval during chopping, the slot is further inserted by the slot slot presence / absence switch. To detect whether or not there is a sheet of paper,
(5) When the insertion port paper presence / absence switch detects that there is no paper sheet, the motor drive unit makes an emergency stop of the shredding cutter in response to a command from the control unit,
(6) If the insertion slot paper presence / absence switch detects that there is paper, the motor drive unit stops the shredding cutter in response to a command from the control unit, and then reversely rotates the shredding cutter. To spit out the paper,
The rotation control of the shredding cutter according to any one of (1) to (6) is performed by the detection operation of the opening / closing detection switch of the insertion opening and the insertion opening / closing paper presence / absence switch as described above. Document shredding machine equipped with a safe paper feeding mechanism.