JP4904557B2 - Safety paper sheet slot mechanism for document shredders. - Google Patents

Description

When a foreign object such as a finger is accidentally inserted into a paper sheet input port of a document shredding machine or carelessly wound, the input port is opened more than a specified interval, and the driving motor of the shredding cutter is The emergency stop makes it easy to remove intruding foreign objects, and also increases the distance from the inlet to the rotating cutter for shredding so that the intruding foreign objects do not reach the The present invention relates to a safety paper sheet slot mechanism of a document shredding machine that prevents loss of accidents.

The present invention prevents a personal injury accident at a paper sheet inlet among troubles related to a paper sheet inlet of various document shredding machines, and provides a highly safe safety paper sheet inlet mechanism. To do.

Conventionally, troubles and accidents caused by intrusion of paper sheets exceeding the capacity, troubles and accidents caused by inadvertent entry of foreign objects, and invaded paper sheets and foreign objects as troubles related to the paper sheet inlet of the document shredding machine There are various problems such as failure or accident that clogs the slot, and removal of invading paper sheets and foreign matters without breaking them as much as possible. However, the most serious trouble among them is the occurrence of a personal injury accident such as damage caused by mistaken insertion or entrainment of fingers.

In the industry, various ideas and researches have been made to prevent troubles related to the paper slot of the document shredder and to realize a safe and easy-to-use slot. The loss accident has not been eradicated and has yet to be satisfied. The following are examples of prior measures for preventing trouble related to the paper sheet slot that have been proposed or embodied.

JP-A-2002-11367 (Prior Art 1) As shown in FIG. 5, 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 to be shredded. The shredding device is provided with opening width switching means D for switching the opening width of the guide path C according to the moving direction of the paper sheet, and the guide is an opening width through which the paper sheet can pass from the input port side to the cutter side. The sheet width is narrower than the opening width d2 in the return direction of the guide path, which is an opening width through which the sheet can pass from the cutter side to the insertion port side. An unusual paper slot has been proposed. The effect of the present invention is that there is no possibility that a user's finger or the like touches the cutter accidentally, and it is possible to limit the excessive supply of paper sheets to the cutter beyond the maximum number or thickness that can be shredded. It is described that the paper sheets that have been supplied to the paper and are partially shredded can be safely and easily discharged from the input port.

  However, in the preceding example 1, the opening width of the guide path in the feed direction is set small to prevent the user's fingers and foreign objects from being inadvertently inserted. A safety confirmation experiment (FIG. 8) of a method of inserting the test piece P imitating a finger into the insertion port and inserting it from the insertion port is easy even if the dimension of the test piece P is smaller than the opening width of the guide path It was confirmed that the fingers were inserted into the guideway. In other words, in the case of the preceding example 1, it was found that it was a little easier to pull out the invading finger, but depending on the insertion method, it was found that there was a possibility that the finger may inadvertently invade, thereby causing an accident that damages the finger .

JP 2004-321993 A (prior example 2) As shown in FIG. 6, the safety shutter mechanism E composed of a rotatable L-shaped plate member is rotated in the insertion direction of the shredded object F during normal times. Although the movement is restricted, but after a trouble occurs, it is possible to rotate freely in the pull-out direction and open the gap of the opening G, so that the document or foreign object to be shredded more than the capacity that causes the trouble This is a document input port of a document shredding machine that is compatible with both prevention of intrusion and ensuring safety, and ease of post-processing in the event of trouble and ensuring safety.

  The prior example 2 is an invention for countermeasures against troubles relating to a paper sheet input port of a document shredding machine previously developed by the present inventor (2002). In the case of the preceding example 2 as well, it is possible to secure safety such as prevention of intrusion of documents and foreign objects exceeding the capability that causes trouble, and ease of post-processing and safety in the event of trouble. This is an embodiment of a slot that can be secured. A safety shutter mechanism E is provided at the insertion port, and the rotation in the insertion direction is restricted. The gap at that time is set to 5 mm or 3 mm so that only paper sheets can pass through and put into practical use. As a result, there were almost no human injury accidents, but a safety confirmation experiment using our test piece P (as shown in FIG. 8, the present inventor simulated a finger between two sheets of paper. A safety check of the method of putting in from the inlet with P in between. As a result, it was confirmed that the test piece P penetrates beyond the safety shutter mechanism E and that the test piece P is greatly deformed as a result of the penetration. In the case of the prior example 2, it was found that careless intrusion of the user's fingers could not be prevented depending on the insertion method, and it was not possible to eliminate the human injury accident.

(Prior Example 3) FIG. 7 shows an existing embodiment, in which an L-shaped maximum opening width restricting body H for restricting the maximum number of sheets or the maximum thickness that can be shredded is fixedly provided on the input side of the input port. At the same time, it is closed on the cutter supply side of the input port, but the document shredding is made up of a shutter part I that guides in the direction of the cutter part while being held by its own weight when the paper passes. The paper slot for the machine is shown. The preceding example 3 is an example in which the present inventor has improved the preceding example 2, and controls the sheets fed at two places on the loading side and the cutter supply side. In addition, the maximum value of the opening width regulated by the fixed maximum opening width regulating body H was 3 mm to 5 mm.

For the preceding example 3 as well, a safety confirmation experiment (Fig. 8) using our test piece P was performed. As a result, as shown in FIG. 7, it was found that the test piece P easily enters through the interval regulated by the maximum opening width restricting body H even if the size is large. In addition, it was confirmed that the test piece P that was forcedly invaded had been greatly deformed, and that the tip of the test piece P was in a state of being shredded by 22 m from the meshing of the shredding cutter. . In the case of the prior example 3, it was found that not only can the accidental intrusion of the user's finger not be prevented by the loading method, but in that case, the finger may be seriously damaged.

As described above, all of the preceding examples have a restricting means that prevents paper sheets exceeding the capacity from being inserted into the paper sheet slot of the document shredding machine, which prevents inadvertent entry of fingers and foreign objects. However, according to the results of the safety confirmation experiment using our test piece P (Fig. 8), in either case, it is not possible to prevent the user's fingers from being erroneously inserted or inadvertently involved. It was found that it was not possible to completely prevent personal injury accidents.

In recent years, it has become an era when protection of personal information is required, and document cutters (shredders) have become widespread and the market has expanded. With this, at the entrance of document cutters (shredders) Personnel accidents are also increasing 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 cutters are required to be safer in use than ever before.

However, it is indispensable to provide a predetermined gap or opening at the paper sheet slot of the document shredding machine. The usage method is ten colors and the usage mode exceeds the expected range. Therefore, it is a very difficult problem to completely eliminate a human accident.

  As a result of the safety confirmation experiment (Fig. 8) using our test piece P, the present inventor has conventionally provided various means for limiting the opening width of the insertion port to be small so that fingers do not enter. In that case, we learned that it was inevitable that an accident would occur where the fingers would almost always penetrate beyond the narrow opening width. Therefore, the inventor changed the conventional idea of making it difficult for a finger to enter the insertion slot, and configured that the opening width of the insertion slot widens in reverse if the finger tries to enter the insertion slot. When the entrance of the mouth opens more than the specified amount, it is detected and the shredding cutter is surely stopped urgently. In addition, when trying to pull out foreign matter such as a finger that has entered, the slot is easily opened wider than a specified amount so that it can be pulled out easily. Furthermore, if the shredding speed is fast, the pull-in will increase due to inertial rotation from the stop signal until the shredding cutter stops, ensuring a sufficient distance from the slot to the shredding cutter for safety. There is a need to.

In accordance with the design policy based on such a new concept, the present invention reliably prevents accidents at the paper slot of the document shredding machine, ensures safety, and performs post-processing of trouble. The purpose is to embody a safety paper sheet slot mechanism of a document shredding machine that can be facilitated.

According to a first aspect of the present invention, a paper sheet insertion port, a guide space path and a guide shutter portion that follow the paper sheet are formed. And a paper cutter slot mechanism of a document shredding machine that can be shredded and fed to a rotating cutter for cutting through a guide shutter, and the paper slot inlet mechanism is inserted into the base frame. A loading receiving plate body composed of a plate portion, a guide receiving plate portion that follows it, and a shutter receiving plate portion that follows it is fixed, and an upper surface swing guide member and a movable shutter member are mounted so as to correspond to this. Thus, an opening / closing opening that can be opened and closed, and a guide space path and a guide shutter portion that follow the opening are formed, and the upper surface swing guide member that forms the insertion opening is a region where the insertion opening is opened from the normally open position. It pivots only at the pivot, and The opening and closing detection switch and the normally open position locking stopper biasing power spring to the frame Yes and disposed involved in the top swing guide member, inlet by the normally open position locking stopper always a predetermined interval In addition to being in an open state, a predetermined load is applied when swinging in the direction in which the inlet is opened by the biasing ridge, and the inlet is opened more than the specified interval by the open / close detection switch. The movable shutter member forming the guide space path and the guide shutter portion is rotatably attached to the base frame or the upper surface swing guide member. In the upper part of the movable shutter member, there is a large space between the guide receiving plate portion, but a guide space path is formed which gradually becomes narrower as it goes downward. The lower end of the movable shutter member is close to the shutter receiving plate due to its own weight and is always open at the minimum set interval, and the movable shutter member rotates according to its thickness when paper sheets pass through it. A safety paper sheet slot opening mechanism for a document shredding machine, characterized in that a guide shutter unit is configured to feed the shredded cutter toward the shredding cutter.

 The first invention is a basic invention of the safety paper sheet slot mechanism of the document shredding machine according to the present application. A safety paper sheet slot mechanism for a document shredder that has a three-function structure consisting of a sheet slot, a guide space, and a guide shutter, from the slot to the shredding cutter. It is.

The insertion port is composed of an insertion receiving plate portion and an upper surface swing guide member, and is pivotably mounted only in a region opened from the normally open position. The insertion port is always at a predetermined interval. It is in an open state, and a predetermined load is applied when the input port swings in the opening direction. When the input port is opened more than the specified interval, the open / close detection switch is activated. It is comprised so that rotation of the cutter for shredding may be stopped urgently. Then, when a finger tries to enter the insertion port, it swings in the direction in which the opening width of the insertion port widens. Instead, if the inlet port opens more than the specified amount, the shredding cutter is surely stopped immediately. It is characterized by functioning.

The guide space path includes a guide receiving plate portion and a movable shutter member, and the movable shutter member is rotatably mounted, and has a large interval above the movable shutter member. It is comprised so that it may become a narrow space | interval gradually as it goes below. The function of the guide space path is useful for ensuring a sufficient distance from the insertion port to the cutter for shredding for safety, while preventing intrusion of paper sheets and foreign objects from inadvertently breaking. .

  The guide shutter portion is composed of a shutter receiving plate portion and a lower end portion of a movable shutter member. During normal times, the guide shutter portion is opened at a minimum set interval due to its own weight. According to the thickness, the movable shutter member feeds in the direction of the shredding cutter while sandwiching the paper sheet. As a result, it is possible to control the paper sheets fed in the direction of the shredding cutter.

The second invention to receive a patent forms a paper sheet inlet, followed by a guide space path and a guide shutter portion, and when a paper sheet is input from the input slot, a guide space path following the input slot. In the paper sheet slot mechanism of the document shredding machine that can be sent to the shredding cutter that rotates through the guide shutter part and chops, the paper sheet slot mechanism is inserted into the base frame. And a fixed receiving plate body including a subsequent guide receiving plate portion and a shutter receiving plate portion subsequent thereto, and an upper surface swing guide member and a movable shutter member are mounted so as to correspond to this. Thus, the opening / closing opening that can be opened and closed, and the guide space path and the guide shutter portion that follow are formed, and the upper surface swing guide member that forms the insertion opening is only in the region where the insertion opening is opened from the normally open position. While pivoting freely, A normally open position locking stopper, a biasing ridge, and an open / close detection switch are arranged on the frame so as to be related to the upper surface swing guide member. In addition to being in an open state, a predetermined load is applied when swinging in the direction in which the inlet is opened by the biasing ridge, and the inlet is opened more than the specified interval by the open / close detection switch. The safety sheet input mechanism of the document shredding machine described in the first invention is characterized in that the rotation of the shredding cutter is urgently stopped by detecting and operating.

The second invention is a subordinate invention of the first invention mainly characterized by the structure of the slot. The insertion port is composed of an insertion receiving plate portion and an upper surface swing guide member, and is pivotably mounted only in an area opened from the normally open position. The insertion port is always opened at a predetermined interval. In this state, a predetermined load is applied when the input port swings in a direction to be opened when a paper sheet or a foreign object is input. Instead, when the insertion port is opened more than the specified interval, the open / close detection switch is activated and the rotation of the shredding cutter is stopped urgently. In this way, when a finger is about to enter the insertion slot, the idea of swinging in the direction in which the opening width of the insertion slot widens is the opposite of the conventional idea. Instead, when the inlet of the inlet is opened more than a predetermined amount, the driving of the cutter for shredding is urgently stopped so that it can be easily pulled out to ensure safety.

The third invention to receive a patent forms a paper sheet slot, a guide space path following it, and a guide shutter portion, and when a paper sheet is loaded from the slot, a guide space path following the slot. In the paper sheet slot mechanism of a document shredding machine that can be fed into a shredding cutter that rotates through a guide shutter unit and chops, the sheet slot mechanism is inserted substantially horizontally into the base frame. An input receiving plate body composed of a receiving plate portion, an inclined guide receiving plate portion following the receiving plate portion, and a shutter receiving plate portion having a deeper inclination following the receiving plate portion is fixed, and an upper surface swing guide member corresponding to this is fixed. 2. The document according to claim 1, wherein the angle of the direction of transfer between the openable / closable inlet, the subsequent guide space and the guide shutter portion is changed by mounting the movable shutter member and the movable shutter member. Shredder safety paper sheet slot It is a structure.

The third invention is also a dependent invention of the first invention. That is, a fixed receiving plate body is formed of a substantially horizontal insertion receiving plate portion, an inclined guide receiving plate portion followed by a shutter receiving plate portion having a deeper inclination, and correspondingly. It is characterized in that the upper surface swing guide member and the movable shutter member are mounted so that the angle of the insertion opening, the guide space path that follows it, and the guide shutter portion changes. By changing the angle in this way, the drawn paper sheets and foreign matters are reliably guided while changing the angle and guided to the cutter for shredding. In particular, when the shredding speed is high, inertia of the shredding cutter occurs and paper and foreign matter are drawn in the time from the stop signal until the shredding cutter stops (shredding speed 5 m). In the case of / min, it is pulled in about 133 mm). Therefore, it was configured so that the paper sheets and foreign objects that were pulled in were guided by changing the angle over and over again, so that the time required for passing the guidance was increased as much as possible. The reason is that the cutter section for shredding is not reached before the emergency stop, the detection that the paper sheet or the foreign matter is guided and passing, and the passage position thereof are confirmed. That is, it is designed so that safety and certainty are given priority over processing speed.

According to a fourth aspect of the present invention, a paper sheet slot, a guide space path and a guide shutter portion are formed, and when a paper sheet is loaded from the slot, a guide space path following the slot is formed. In the paper sheet slot mechanism of a document shredding machine that can be fed into a shredding cutter that rotates through a guide shutter unit and chops, the sheet slot mechanism is inserted substantially horizontally into the base frame. An input port receiving plate body comprising a receiving plate portion, an inclined guide receiving plate portion following the receiving plate portion, and a shutter receiving plate portion following the receiving plate portion is fixed, and an upper surface swing guide member and a movable shutter are adapted to correspond thereto. By mounting the member, the opening opening that can be opened and closed, the following guide space path and the guide shutter portion are formed, and the upper surface swing guide member that forms the insertion opening is formed at the tip guide slope. A substantially horizontal upper surface guide plate portion having A swing leg portion formed on the base portion and a control support provided on the upper surface guide plate portion, and a substantially horizontal upper surface guide on the substantially horizontal insertion receiving plate portion of the inlet receiving plate body. The plate portions are arranged so as to correspond to each other, and are pivotally supported by a swing fulcrum provided at the lower portion of the leg portion from the swing, so that a substantially horizontal insertion receiving plate portion and a substantially horizontal upper surface guide plate are mounted. The opening formed by the portion is configured to be openable and closable, and is pivotably pivoted only in a region where the insertion port is opened from the normally open position. The urging ridge and the open / close detection switch are arranged so as to be related to the upper surface swing guide member, and the control port is locked to the normally open position locking stopper so that the insertion port is always at a predetermined interval. And the inlet is opened by the biasing spring attached to the control support. When swinging in the direction of rotation, a predetermined load is not applied, and when the input port is opened more than the specified interval, the control support detects and activates the open / close detection switch to urgently rotate the shredding cutter. The movable shutter member that stops and forms the guide space path and the guide shutter portion is rotatably mounted on an upper surface swing guide member, and the guide receiving plate portion is disposed above the movable shutter member. A guide space path is formed which has a large interval between the first and second portions but gradually becomes narrower as it goes downward, and at the lower end of the movable shutter member, the shutter receiving plate portion and the movable shutter member are Are in close proximity and always open at the minimum set interval, and when the paper sheet passes, the movable shutter member is rotated and pinched according to its thickness. A safety paper sheet slot opening mechanism for a document shredding machine, characterized in that a guide shutter portion for feeding in the direction of the shredding cutter is configured.

According to the fourth aspect of the present invention, there is formed a paper sheet slot, a guide space path and a guide shutter section that follow, and when a paper sheet is loaded from the slot, the guide space path and the guide shutter section that follow the slot are provided. It is an embodiment invention of a paper sheet slot mechanism of a document shredding machine that can be fed to a shredding cutter that is rotated through and shredded. The opening / closing detection switch is turned on when the inlet is below the specified amount, and the shredding cutter is set to rotate when an appropriate amount of paper is inserted. However, when the inlet opening opens more than the specified amount (by inserting more than the allowable amount of paper, or by mistakenly inserting a finger, etc.), the open / close detection switch is turned OFF for shredding. Stop the cutter in an emergency. Since the inertial rotational force acts on the chopping cutter, it is desirable to apply a sudden brake and stop it instantaneously. Even when the inlet is opened more than the specified amount and the open / close detection switch is OFF, the shredding cutter can be reversed so that the paper jammed in the inlet can be pulled out. The excessive amount of paper sheets and the fingers inserted by mistake in this way are safely accommodated in the guide space and can be easily pulled out without being damaged. The present invention can smoothly perform post-processing even if there is an inadvertent entry accident at the inlet.

The safety paper sheet slot mechanism of the document shredding machine according to the present invention will be described in detail based on the illustrated embodiment. FIG. 1 is a longitudinal sectional view showing a normal embodiment of the safety paper sheet slot mechanism of the document shredding machine according to the present invention, and FIG. 2 is a safety paper of the document shredding machine shown in FIG. FIG. 3 is a longitudinal configuration diagram showing an embodiment in which a safety confirmation experiment is performed using a leaf slot mechanism and the state at the time of an abnormality is reproduced. FIG. 3 is a diagram illustrating a safety paper sheet slot of the document shredding machine according to the present invention. FIG. 4 is a longitudinal sectional view showing another embodiment of the mechanism in normal operation, and FIG. 4 reproduces the state at the time of abnormality by performing a safety confirmation experiment using the safety paper sheet slot mechanism of the document shredding machine shown in FIG. It is a vertical block diagram which shows the other Example. FIG. 5 is a longitudinal sectional view showing a preceding example of an input port of a conventional document shredding machine, and FIG. 6 is a longitudinal sectional view showing another preceding example of an input port of a conventional document shredding machine. FIG. 7 is a vertical cross-sectional configuration diagram showing a state at the time of abnormality by performing a safety confirmation experiment using the insertion port of the conventional document shredding machine. FIG. 8 is a longitudinal sectional view showing a method for performing a safety confirmation experiment using the safety paper sheet slot mechanism of the document shredding machine.

FIG. 1 shows an embodiment of the safety paper sheet slot mechanism of the document shredding machine according to the present invention, and FIG. 3 shows the same other embodiment. The basic configuration of the present invention is composed of a paper sheet insertion slot 1, followed by a guide space 2 and a guide shutter unit 3. When a paper sheet is loaded from the insertion slot 1, It is sent to a cutter 4 for cutting through the following guide space 2 and guide shutter portion 3 so that it can be shredded.

As shown in FIGS. 1 and 3, the paper sheet slot mechanism includes an insertion receiving plate portion 6 a that is substantially horizontal to the base frame 5, an inclined guide receiving plate portion 6 b that follows, and a shutter receiving plate portion that follows the insertion receiving plate portion 6 b. The insertion port receiving plate body 6 composed of 6c is fixed, and the upper surface swing guide member 7 and the movable shutter member 8 are mounted so as to correspond thereto, so that the opening / closing port 1 which can be opened and closed is followed. A guide space 2 and a guide shutter portion 3 are formed. In the case of the illustrated embodiment, the angle in the transfer direction between the openable / closable inlet 1, the subsequent guide space 2 and the guide shutter 3 is changed. Specifically, as shown in FIG. 8, the insertion receiving plate 6a is horizontal, the subsequent guide receiving plate 6b is inclined by 40 degrees, and the subsequent shutter receiving plate 6c is further inclined by 20 degrees. Is formed.

The upper surface swing guide member 7 forming the input port 1 includes a substantially horizontal upper surface guide plate portion 10 having an input guide slope 9 at the tip, a swing leg portion 11 formed vertically at the base portion, and the upper surface guide. It is formed from a control support 12 provided on the plate portion 10, and is arranged so that the substantially horizontal upper surface guide plate portion 10 corresponds to the substantially horizontal insertion receiving plate portion 6 a of the insertion port receiving plate body 6. It is pivotally supported by a swinging fulcrum 13 provided at the lower part of the swinging leg 11 so as to be swingable. The insertion port 1 formed by the substantially horizontal insertion receiving plate portion 6a and the substantially horizontal upper surface guide plate portion 10 is configured to be openable and closable, and swings only in a region where the insertion port 1 is opened from the normally open position. It is pivotally attached. The difference between the embodiment shown in FIGS. 1 and 2 and FIGS. 3 and 4 is that the substantially horizontal insertion receiving plate portion 6a constituting the insertion port 1 and the substantially horizontal upper surface guide plate portion 10 correspond to each other. However, in the case of the embodiment of FIGS. 1 and 2, a portion that overlaps in a slightly horizontal state is formed, whereas in the case of the embodiments of FIGS. 3 and 4, the bent portion and the upper surface of the insertion receiving plate portion 6a are formed. The point which is comprised so that the bending part of the guide plate part 10 may correspond is different. In the former, the input direction is limited to the horizontal direction so that the operator does not have to consciously push it in, so that fingers and the like are not erroneously inserted due to the psychology of the operator. In the latter, the insertion direction is widened from the horizontal direction to the oblique direction to facilitate insertion, and is suitable for semi-automatic insertion. Hereinafter, when the description numbers of the members in FIGS. 1, 2, 3, and 4 are the same, the members are the same.

On the other hand, a normally open position locking stopper 14, an urging ridge 15, and an opening / closing detection switch 16 are arranged on the base frame 5 so as to be related to the control support 12 of the upper surface swing guide member 7. First, the normally open position locking stopper 14 is disposed on the base frame 5, and the control port 12 is locked to the normally open position locking stopper 14 so that the insertion port 1 is determined at the time of design. It is always open at a predetermined interval. In the case of the illustrated embodiment, the predetermined opening interval of the inlet 1 was set to 3 to 5 mm. Specifically, the maximum number of shredded sheets varies depending on the model, and is set to open at intervals of 3 mm or less for the small personal type and 5 mm or less for the large floor type.

Next, the urging ridge 15 is attached to the base frame 5 and the control support 12, and a predetermined load is applied when the urging ridge 15 swings in the direction in which the insertion port 1 is opened. It is arranged like this. Furthermore, although the open / close detection switch 16 is disposed on the base frame 5, when the upper surface swing guide member 7 swings so that the insertion port 1 is opened more than a predetermined interval, the control support 12 is opened / closed. The detection switch 16 was turned OFF to stop the rotation of the shredding cutter 4 urgently. At this time, inertial rotation is caused by the rotation speed of the shredding cutter 4, so that the paper sheets and the erroneously inserted fingers are drawn in from the stop signal until the shredding cutter stops. End up. Therefore, it is desirable that when the open / close detection switch 16 is turned off, the rotation of the shredding cutter 4 is suddenly braked to stop immediately.

That is, the insertion port 1 of the present invention is constituted by the insertion receiving plate portion 6a and the upper surface swing guide member 7, and is pivotally mounted only in the region opened from the normally open position. The opening 1 is always open at a predetermined interval, and a predetermined load is applied when the input port 1 swings in the opening direction, so that the input port 1 is opened more than a specified interval. Therefore, the rotation of the cutter 4 is urgently stopped by the open / close detection switch 16.

Next, the movable shutter member 8 forming the guide space path 2 and the guide shutter portion 3 is pivotally attached to the upper surface swing guide member 7 so as to be rotatable. The upper part of the movable shutter member 8 has a large space with the guide receiving plate portion 6b, but a guide space path 2 is formed which gradually becomes narrower as it goes downward. The guide space 2 is formed to be larger than the opening interval of the insertion slot 1, and is configured so as not to inadvertently damage the drawn paper sheets or the wrongly inserted fingers, and can be easily pulled out. Can be done.

Further, the lower end portion of the movable shutter member 8 is configured such that the shutter receiving plate portion 6c and the movable shutter member 8 are close to each other by its own weight and always open with a minimum set interval. The regular minimum setting interval of the shutter is determined as a measure for a tie or a necklace, and is set to 0.7 mm in the embodiment. Accordingly, the guide shutter unit 3 is configured to send out the sheet in the direction of the shredding cutter 4 in a state where the movable shutter member 8 is pivoted and sandwiched in accordance with the thickness of the sheet passing through. In the figure, reference numeral 17 denotes a paper presence / absence sensor mounted on the movable shutter member 8 for automatically starting driving of the shredding cutter 4 when a paper sheet inserted into the insertion slot 1 is detected. Is.

The safety paper sheet inlet mechanism of the document shredding machine according to the present invention is configured as described above, and forms a paper sheet inlet 1, followed by a guide space 2 and a guide shutter 3. When a paper sheet is introduced from the insertion slot 1, it can be sent to the shredding cutter 4 that rotates through the guide space 2 and the guide shutter portion 3 following the insertion slot 1 and can be shredded. The safety paper sheet slot mechanism of the document shredding machine is configured such that when the inlet of the slot 1 is less than the specified amount, the open / close detection switch 16 is turned on, and an appropriate amount of sheets is permitted. Then, the cutter 4 for cutting is set so as to be driven to rotate. However, if the entrance of the insertion port 1 opens more than the specified amount due to the insertion of more than the allowable amount of paper or the insertion of a finger or the like by mistake, the open / close detection switch 16 is turned off, The cutting cutter 4 is urgently stopped. At this time, since the inertial rotational force acts on the shredding cutter 4, it is desirable to apply a sudden brake and stop it instantaneously. Even when the inlet 1 is opened more than a predetermined amount and the open / close detection switch 16 is in an OFF state, the shredding cutter 4 can be reversed so that the paper sheets jammed in the inlet 1 can be pulled out. . Thus, even when an excessive amount of paper sheets or a wrongly inserted finger is pulled in, they are safely stored in the guide space 2 and can be easily pulled out without being damaged. The present invention can smoothly perform post-processing even if there is an inadvertent entry accident at the inlet 1 as described above.

  As shown in FIG. 8, the inventors conducted a safety test of the input port of the document shredding machine and confirmed its safety. This insertion port safety test is to create a test piece P that imitates a finger, and assume that there is no risk of personal injury by conducting the following test assuming that the finger is inserted incorrectly into the insertion port. It 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.

FIG. 2 is a longitudinal sectional view showing an embodiment in which a safety confirmation experiment is performed using the safety paper sheet slot mechanism of the document shredding machine shown in FIG. 2 are the same as those in FIG. 1 and are not described here. As shown in FIG. 2, when the test piece P is inserted from the insertion port 1 and the inlet of the insertion port 1 opens more than a specified amount against the load of the biasing ridge 15, the control support 12 is controlled by the control opening / closing detection switch. 16 is turned OFF to turn off the shredding cutter 4 in an emergency manner. At this time, the test piece P is not damaged and is accommodated in the guide space 2. At this time, it was confirmed that the test piece P did not reach the shredding cutter and that the test piece P sandwiched in the insertion port 1 could be easily pulled out, so that it was possible to prevent human injury accidents.

FIG. 4 is a longitudinal sectional view showing another embodiment in which a safety confirmation experiment is performed using the safety paper sheet slot mechanism of the document shredding machine shown in FIG. 4 are the same as those in FIG. 1 and are not described here. As shown in FIG. 4, when the test piece P is inserted from the insertion port 1, the inlet of the insertion port 1 opens more than a specified amount against the load of the biasing ridge 15, and the control support 12 detects the control opening / closing. The switch 16 is pressed to turn it off, and the rotation of the shredding cutter 4 is urgently stopped. At this time, the test piece P is not damaged and is accommodated in the guide space 2. At this time, it was confirmed that the test piece P did not reach the shredding cutter and the test piece P sandwiched in the insertion port 1 could be easily pulled out. Therefore, even in the case of the present embodiment, it is possible to prevent a human accident.

It is a vertical block diagram which shows one Example of the normal time of the safety paper sheet slot mechanism of the document shredding machine concerning this invention. It is a vertical block diagram which shows one Example which reproduced the state at the time of a safety confirmation experiment using the safety paper sheet slot mechanism of the document shredding machine shown in FIG. It is a vertical block diagram which shows the other Example of the normal time of the safety paper sheet slot mechanism of the document shredding machine concerning this invention. It is a vertical block diagram which shows the other Example which reproduced the state at the time of a safety confirmation experiment using the safety paper sheet slot mechanism of the document shredding machine shown in FIG. It is a vertical block diagram which shows one prior example of the insertion port of the conventional document shredding machine. It is a vertical block diagram which shows the other prior example of the insertion port of the conventional document shredding machine. It is a vertical block diagram which shows the state at the time of performing a safety confirmation experiment using the insertion port of the conventional document shredding machine. It is a vertical block diagram which shows the method of performing a safety confirmation experiment using the safety paper sheet slot mechanism of a document shredding machine.

Explanation of symbols

1: Input slot 2: Guide space path 3: Guide shutter part 4: Shredding cutter 5: Base frame 6: Input slot receiving plate body 6a: Insert receiving plate part 6b: Guide receiving plate part 6c: Shutter receiving plate part 7 : Upper surface swing guide member 8: Movable shutter member 8a: Pivoting 9: Loading guide slope 10: Upper surface guide plate portion 11: Swing leg portion 12: Control support 13: Swing fulcrum 14: Normally open position locking Stopper 15: Energizing bar 16: Open / close detection switch 17: Paper presence / absence sensor A: Input slot B: Cutter C: Guide path D: Opening width switching means E: Safety shutter mechanism F: Shredded object G: Opening H: Maximum opening width restricting body I: Shutter part P: Test piece

Claims (4)

Forming a paper sheet slot, a guide space path and a guide shutter section that follow, and cutting paper that rotates through the guide space path and the guide shutter section following the slot when a sheet is loaded from the slot. A paper sheet slot mechanism of a document shredding machine that can be sent to a cutter and shredded,
The paper sheet input port mechanism is fixedly provided with an input receiving plate body including an insertion receiving plate portion, a guide receiving plate portion that follows the insertion receiving plate portion, and a shutter receiving plate portion that follows the insertion receiving plate portion, and corresponds to this. By mounting the upper surface swing guide member and the movable shutter member as described above, the opening opening that can be opened and closed, the subsequent guide space, and the guide shutter portion are formed,
The upper surface swing guide member that forms the inlet is pivotably mounted only in the region where the inlet is opened from the normally open position, and the normally open position locking stopper, the urging ridge, and the opening / closing detection on the base frame. The switch is disposed so as to be related to the upper surface swing guide member, and the charging port is always opened at a predetermined interval by the normally open position locking stopper. When swinging in the opening direction, a predetermined load is applied.Furthermore, when a foreign object is inserted or caught and the insertion port is opened more than the specified interval, the open / close detection switch is activated, The rotation of the shredding cutter is stopped urgently,
The movable shutter member forming the guide space path and the guide shutter portion is rotatably mounted on a base frame or an upper surface swing guide member, and an upper portion of the movable shutter member is connected to the guide receiving plate portion. There is a guide space that has a large gap between them, but gradually becomes narrower as it goes down. The lower end of the movable shutter member is close to the shutter receiving plate by its own weight, and is always set to the minimum. There is a guide shutter part that is opened at intervals, and is sent out in the direction of the cutter for shredding with the movable shutter member pivoting and sandwiching according to the thickness of the paper sheet passing through it A safety paper sheet slot mechanism for a document shredding machine.
Forming a paper sheet slot, a guide space path and a guide shutter section that follow, and cutting paper that rotates through the guide space path and the guide shutter section following the slot when a sheet is loaded from the slot. In the paper sheet slot mechanism of the document shredder that can be sent to the cutter and shredded,
The paper sheet input port mechanism is fixedly provided with an input receiving plate body including an insertion receiving plate portion, a guide receiving plate portion that follows the insertion receiving plate portion, and a shutter receiving plate portion that follows the insertion receiving plate portion, and corresponds to this. By mounting the upper surface swing guide member and the movable shutter member as described above, the opening opening that can be opened and closed, the subsequent guide space, and the guide shutter portion are formed,
The upper surface swing guide member that forms the inlet is pivotably mounted only in the region where the inlet is opened from the normally open position, and the normally open position locking stopper, the urging ridge, and the opening / closing detection on the base frame. The switch is disposed so as to be related to the upper surface swing guide member, and the charging port is always opened at a predetermined interval by the normally open position locking stopper. When swinging in the opening direction, a predetermined load is not applied, and when the input port is opened beyond the specified interval, the open / close detection switch is activated to stop the shredding cutter from rotating. The safety paper sheet slot mechanism of the document shredding machine according to claim 1, wherein:
Forming a paper sheet slot, a guide space path and a guide shutter section that follow, and cutting paper that rotates through the guide space path and the guide shutter section following the slot when a sheet is loaded from the slot. In the paper sheet slot mechanism of the document shredder that can be sent to the cutter and shredded,
The paper sheet input slot mechanism is configured to fix an input receiving plate body including a substantially horizontal insertion receiving plate portion, an inclined guide receiving plate portion, and a shutter receiving plate portion having a deeper inclination following the insertion receiving plate portion. By installing the upper surface swing guide member and the movable shutter member so as to correspond to this, the angle of the transfer direction between the openable / closable inlet, the subsequent guide space, and the guide shutter portion is changed. The safety paper sheet slot mechanism of the document shredding machine according to claim 1, wherein the safety paper sheet slot mechanism is formed as described above.
Forming a paper sheet slot, a guide space path and a guide shutter section that follow, and cutting paper that rotates through the guide space path and the guide shutter section following the slot when a sheet is loaded from the slot. In the paper sheet slot mechanism of the document shredder that can be sent to the cutter and shredded,
The paper sheet slot mechanism is fixed to a base frame with a slot slot receiving plate body including a substantially horizontal insertion receiving plate portion, an inclined guide receiving plate portion, and a shutter receiving plate portion following the insertion receiving plate portion. The upper surface swing guide member and the movable shutter member are attached so as to correspond to this, so that an openable / closable inlet, a subsequent guide space, and a guide shutter portion are formed.
The upper surface swing guide member forming the input port includes a substantially horizontal upper surface guide plate portion having a input guide inclined surface at a front end portion, a swing leg portion formed at the base portion thereof, and a control provided on the upper surface guide plate portion. And a substantially horizontal upper surface guide plate portion corresponding to the substantially horizontal insertion receiving plate portion of the insertion port receiving plate body, and provided at the lower portion of the leg portion by the swinging. The insertion port formed by the substantially horizontal insertion receiving plate part and the substantially horizontal upper surface guide plate part is configured to be openable and closable. Is pivotably mounted only in the region opened from the normally open position, and the normally open position locking stopper, the urging spring, and the open / close detection switch are arranged on the base frame so as to be related to the upper surface swing guide member. When the control support is locked to the normally open position locking stopper, the insertion port is always In addition to being in a state of opening at a predetermined interval, a predetermined load is not applied when the input port swings in the direction of opening due to the biasing spring mounted on the control support. When it opens more than the specified interval, the control support detects and activates the open / close detection switch so that the rotation of the cutter for shredding is urgently stopped.
The movable shutter member that forms the guide space path and the guide shutter portion is rotatably mounted on an upper surface swing guide member, and is large between the guide shutter plate portion and the upper portion of the movable shutter member. There is a guide space path that has a gap but gradually becomes narrower as it goes downward. At the lower end of the movable shutter member, the shutter receiving plate part and the movable shutter member are close to each other by their own weight, and are always at a minimum. The guide is configured to open at a set interval, and when the paper sheet passes through, the movable shutter member rotates in accordance with the thickness of the paper sheet and feeds it in the direction of the shredding cutter. A safety paper sheet slot mechanism of a document shredding machine characterized by comprising a shutter section.