JP2002239405A - Charging port for material to be shredded in shredder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charging port which is used for charging a material to be shredded into a shredder and capable of preventing clogging of the shredder with paper, due to supply of paper sheets whose number exceeds a prescribed number of the paper sheets. SOLUTION: This charging port 4 is provided with a charging passageway 5 which is composed of a front chute cover 1 and a rear end cover 2, and the size of which is set so as to be larger than the thickness of the shreddable number of paper sheets with shredding blades, and also, a detection mechanism that is placed in the charging passageway 5 and used for detecting the thickness of a material to be shredded and stopping a driving motor 14 for the shredding blades when such a to-be-shredded material having a thickness larger than a prescribed thickness is passed through the charging passageway 5, wherein, the detection mechanism consists of a thickens restriction cylinder 6 which is rotatably supported with a supporting shat 7 placed between the side plates of the charging port 4 and pressed to the side of the front chute cover 1 by a coil spring 9 and the rotation of which is restrained by the rear end cover 2, and thereby is capable of controlling the shreddable number of paper sheets, and a microswitch 10 is placed adjacently to the rear wall of the thickness restriction cylinder 6 and operated by rotation of the thickness restriction cylinder 6 so as to stop the shredder blade driving motor 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a shredded material inlet of a shredder, and performs a reverse discharge operation when a shredded object is thrown in beyond the shredding capacity of the shredder or when a paper jam occurs. In such a case, the rotation of the drive motor of the shredding blade is automatically stopped.

[0002]

2. Description of the Related Art In a conventional shredder, a supply port of a shredded object (paper) is supplied so that the shredder itself does not exceed the shredding capability of the shredder itself, that is, the maximum number of pieces that can be shredded. The width of the passage is limited to a predetermined width. The reason is that if the width of the input passage is set to a size exceeding the shredding capacity, a large amount of paper is supplied at one time and a paper jam occurs when overloaded, and the driving motor of the shredding blade In addition to the adverse effects such as burning, the danger of safety and mechanical security, such as accidentally inserting a finger or the entry of foreign matter, increases.

On the other hand, depending on various conditions such as the hardness of the paper and the supply angle, a paper jam may occur even if the number of sheets within the range of the shredding capacity is supplied. Therefore, there is a model equipped with a reversing function of the driving motor of the shredding blade for discharging the shredded object, but there is a problem that it is difficult to pull out a jammed paper bundle during the reversing operation. In other words, the leading end of the paper bundle that has been jammed by the shredder blade is in the process of being shredded by the shredder blade, and the strip-shaped tongue pieces are staggered up and down in the thickness direction of the paper bundle. It is in a state of being hardened by the power of the shredding blade, and it is enormous. For this reason, even if the shredding blade is rotated in the reverse direction, the sheet bundle may be caught in the input passage having the predetermined width, and the discharge may be difficult. Usually, in such a case, the operator grasps the paper bundle by hand and pulls it out, which requires a large amount of force and is complicated and dangerous.

[0004] For this reason, several shredders have been proposed that take measures against paper jams. For example, Shoko 51-11
No. 081 relates to a document guide device of a document shredding machine, and a guide roller provided at a lower end portion of a blind plate pivotally attached at an upper portion to a peripheral surface of a roll cutter is contacted via a spring, In addition to reliably guiding the document to the meshing part of the roll cutter, the micro switch is operated using the movement of the blind plate, and the device that automatically stops or reverses the document shredder is operated. is there. Japanese Unexamined Utility Model Publication No. 63-1642 relates to a document shredding machine with a cover, in which a cover member is provided so as to minimize the opening, and a pressing member for holding paper is provided on the back surface of the cover member. It is. All of these are intended to prevent paper jams by pressing down the paper to be shredded and supplying it so as to reliably mesh with the shredder blade, but when the drive motor of the shredder blade reverses due to paper jam or the like. In this method, it was necessary to manually open the cover and the like, manually remove the paper, and then return the cover and the like to the original state.

Japanese Utility Model Registration No. 3017222 relates to an inlet of a shredder, and a guide plate movable in the thickness direction of the shredder is supported at the inlet.
This also narrows the paper input path, but has a structure in which the guide plate becomes an obstacle to discharge at the time of reverse rotation discharge, and it is difficult to pull out the paper bundle.

On the other hand, in a conventional shredder, in a reverse rotation discharge operation at the time of paper jam, a method of setting a certain time in anticipation and reversing the drive motor of the shredding blade is generally used. For this reason, even after the paper bundle bitten from the shredding blade was actually removed, the drive motor continued to rotate in reverse for a set period of time, wasting power energy. .

[0007]

SUMMARY OF THE INVENTION According to the present invention, a predetermined amount of paper is supplied to a shredding blade in order to prevent a paper jam of a predetermined number or more from being supplied when the paper bundle is shredded. In addition to eliminating the need to manually open the cover during the reverse discharge operation when a paper jam occurs, the reverse discharge operation is smooth, and the reverse discharge operation of the drive motor for the shredder blade is also performed. The purpose is to suppress waste of power energy by minimizing time.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a shredder, in which an input passage formed by a front chute cover and a rear end cover is cut by a shredding blade. And a detecting mechanism for detecting the thickness of a shredded object passing through the passage in the input passage, and a shredding blade when a shredded object having a predetermined thickness or more passes. Means to stop the drive motor of the vehicle.

When the detection mechanism feeds a bundle of papers equal to or greater than the number of pieces that can be shredded by the shredding blade, the drive motor for the shredding blade is immediately stopped. The overload can be reliably avoided.

The detection mechanism is a thick limiting cylinder made of a cylindrical member having a substantially U-shaped cross section, and is rotatably supported on a support shaft provided between the input port side plates, and is rotatably supported by a coil spring. With this arrangement, the front chute cover is urged and the rear end cover restricts the rotation so that the size of the insertion passage becomes the number of pieces that can be shredded.

Since the height of the input passage is regulated by the thickness-limiting cylinder, a sheet bundle of a predetermined number or less easily passes and is shredded, and a sheet bundle of a number that can be shredded or more passes. In that case, the paper bundle will push up the thick limiting cylinder,
The drive motor is stopped.

For this reason, a micro switch is provided near the rear wall of the thick limiting cylinder, and the rotation of the thick limiting cylinder activates the micro switch to stop the drive motor for the shredding blade. did.

When a sheet bundle having a predetermined thickness or more passes, the thickness limiting cylinder is pushed up and the micro switch is actuated by its rotation, so that the drive motor of the shredding blade can be immediately stopped.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a shredder inlet of a shredder according to the present invention will be described below with reference to the drawings. FIG. 1 is a partially omitted side sectional view of a shredder provided with the device of the present invention, and FIG. 2 is a partially enlarged view thereof. FIG. 3 is a plan view of the charging port. FIG.
FIG. 5 is an operation explanatory diagram.

In each of the figures, reference numeral 1 denotes a front chute cover, 2 denotes a rear end cover, and both of them and left and right input port side plates 3 and 3 constitute a hopper-shaped input port 4. The lower end of the rear end cover 2 is bent rearward so as to be parallel to the front chute cover 1 to form a charging passage 5 having a constant height. The height of the input passage 5 is set to be greater than the number of shredders that can be shredded. On the lower surface of the rear end cover 2, a thickness limiting cylinder 6 for detecting the thickness of a bundle of sheets inserted facing the end position of the insertion passage 5 is rotatably installed.

The thickness limiting cylinder 6 is formed of a cylindrical member having a substantially U-shaped cross section having substantially the same length as the opening width of the charging port 4, and has side plates 6a at both left and right ends. . Further, a longitudinal corner 6b facing the front chute cover 1
(The part that comes into contact with the shredded paper) is rounded. The thickness limiting cylinder 6 is provided at the lower part of the side plate 6a at the input side
The pivot 6 is rotatably supported by a support shaft 7 provided therebetween, and the corner 6b is rotatable in an arc around the support shaft 7 (see FIG. 4). Spring mounting shafts 8, 8 are respectively mounted on the upper portion of the side plate 6a and the front chute cover 1 side of the input side plate 3, and a coil spring 9 is stretched between the spring mounting shafts 8, 8 to limit the thickness. The cylinder 6 is urged to always rotate toward the front chute cover 1.

The cylindrical thickness limiting cylinder 6 has an upper opening, a front wall 6c formed facing the rear end cover 2, and a rear wall 6d formed on the opposite side. The rotation of the rear end cover 2 is restricted by contacting the bent end of the rear end cover 2. The positional relationship is adjusted so that the interval between the corner portion 6b of the thickness limiting cylinder 6 and the opposing front chute cover 1 is equal to the number of shredders that can be shredded.
That is, the thickness of the sheet bundle can be detected at this interval.

A microswitch 10 is mounted near the rear wall 6d, and its actuator 10a comes into contact with the rear wall 6d by the rotation of the thick limiting cylinder 6, so that the microswitch 10 is turned on. Has become. The microswitch 10 is connected so as to stop the rotation of the drive motor of the shredding blade when in the ON state.

Reference numerals 11 and 11 denote vertical cutters installed in two oblique stages, 12 denotes a rotary cutter for horizontal cutting, and 13 denotes a rotary cutter.
Is a fixed cutter for crossing, 14 is a drive motor, and 15 is a gear group, all of which are well known to shredders. 16 is a shredder housing, 17 is a waste box, and 18 is a door. Further, (P) is shredded paper, and (Q) is shredded waste.

Next, the operation of the shredder having the above-described inlet will be described. Shredder input 4
When the shredded paper (P) is supplied to the front chute cover 1, the shredded paper is guided to the input passage 5 from between the front chute cover 1 and the rear end cover 2.

If the paper to be shredded (P) is a sheet bundle of an appropriate number of shreds, it passes under the thick limiting cylinder 6 and passes through the input passage 5 as it is to engage the longitudinal cutting cutters 11, 11. And shreds normally.

When the paper to be shredded is a bundle of papers of a number larger than the shredding capacity, it enters the insertion passage 5 as shown in FIG. 4, but leaves the gap between the front chute cover 1 and the thick limiting cylinder 6 as it is. It cannot pass, and the thick limit cylinder 6 is pushed upward against the force of the coil spring 9 due to the thickness of the paper bundle. Then, the thickness limiting cylinder 6 rotates upward about the support shaft 7, and the rear wall 6d pushes the actuator 10a of the microswitch 10 to turn it on (see FIG. 4B), and the rotation of the drive motor 14 Stops. Therefore, shredding is not started, and it is possible to prevent the drive motor from being overloaded.

Further, even when an appropriate number of shredded papers (P) are supplied, paper jam may occur due to exceeding the shredding capacity depending on the supply angle and the quality of the paper. In this case, usually, the drive motor 14 for the shredding blade is stopped by a paper jam detection circuit (not shown) to stop the shredding, and the drive motor 14 rotates in the reverse direction to reverse the shredded paper that has caused the paper jam. To discharge in the direction of. At this time, the operator pulls the rear end of the paper bundle with the paper jam by hand, and pulls the front end of the paper bundle partially into the vertical cutter as shown in FIG. As a result of being bitten, the tip is voluminous and thicker than the original bundle of paper.
Therefore, the front chute cover 1 and the thick limiting cylinder 6
When passing through the gap, the thick limiting cylinder 6 is pushed up (see FIG. 3B). Also in this case, similarly to the above, the thickness limiting cylinder 6 rotates about the support shaft 7 and
d pushes the actuator 10a of the microswitch 10 to the ON state, and the reverse rotation of the drive motor 14 is stopped. Therefore, it is not necessary to set the drive time of the drive motor 14 at the time of reverse rotation discharge in the conventional manner, and waste of electric power is reliably avoided.

[0024]

As described above, in the shredder input port of the shredder according to the present invention, since the input path itself has a margin in height, it is easy for both supply and discharge of the paper bundle to pass through this section. . In addition, if the thickness of the shredded object is regulated by the thickness limiting cylinder and a sheet bundle exceeding the number of shredders that can be shredded is supplied, the rotation of the drive motor of the shredding blade is immediately stopped. So that they are not shredded.

Also, even if a finger or the like accidentally enters the insertion passage,
Since the detection is performed by the thickness limiting cylinder and the drive motor is stopped, the safety is extremely high. Further, even when foreign matter is mixed, the thick limiting cylinder is urged toward the front chute cover side, so that foreign matter having a thickness greater than the limited thickness cannot pass through and is easily taken out.

Even when a paper jam occurs, the shredded object can be easily pulled out, and at the same time, the driving motor of the shredding blade is stopped, so that power consumption can be suppressed.

In short, only a simple structure in which the thickness-limiting cylinder is rotatably supported by a support shaft does not supply a predetermined number or more of shredded objects, and prevents the intrusion of fingers and foreign matter to drive. This has an excellent effect that the function of stopping the motor and the function of quickly stopping the rotation of the drive motor during the reverse rotation operation can be achieved at the same time.

[Brief description of the drawings]

FIG. 1 is a partially omitted side sectional view of a shredder provided with the device of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a plan view of a charging port.

FIG. 4 is an explanatory diagram illustrating an operation of a thick-restriction cylinder when a predetermined number or more of paper bundles are supplied.

FIG. 5 is an explanatory diagram showing an operation of the thickness-limiting cylinder when pulling out a paper bundle having a paper jam;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 front chute cover 2 rear end cover 3 input port side plate 4 input port 5 input path 6 thick limiting cylinder 6a side plate 6b corner 6c front wall 6d rear wall 7 support shaft 8 spring mounting shaft 9 coil spring 10 micro switch 14 drive motor

Claims (3)

[Claims] 1. A shredder having a shredded material input port,
A detection mechanism for setting the throwing path formed by the front chute cover and the rear end cover to be greater than the thickness of the shredding blade that can be shredded, and detecting the thickness of the shredded object passing through the throwing path in the throwing path Wherein the shredder is configured to stop the drive motor of the shredding blade when a shredded object having a predetermined thickness or more passes. 2. A detecting mechanism, comprising: a thick limiting cylinder formed of a cylindrical member having a substantially U-shaped cross section; rotatably supported by a support shaft provided between the input port side plates; 2. A shredded object inlet of a shredder according to claim 1, wherein the shrinker is biased toward the front chute cover and the rotation is regulated by a rear end cover so that the size of the throwing path is the number of pieces that can be shredded. . 3. A micro switch is provided close to the rear wall of the thick limiting cylinder, and the rotation of the thick limiting cylinder activates the micro switch to stop the drive motor of the shredding blade. 3. A shredded object inlet of the shredder according to claim 1 or 2.