JP2008055269A - Shredder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a very safe shredder which surely prevents a person from inserting his finger into a throw-in hole. <P>SOLUTION: The shredder 1 cuts a material to be cut, which is thrown in from a throw-in hole 9, with a rotary blade 12 and discharges the cut material into a trash accommodation box 7. In this case, the throw-in hole is covered with a cover 4, and a gap 30 whose width prevents the insertion of an infant's finger is provided between the cover and the shredder body 2, and a limit switch 20 is provided so that the rotary blade may not be driven due to the shift of the cover. When the finger is inserted into the gap between the shredder body and the cover and then the cover is moved, the rotary blade is not driven. Consequently, the situation that the finger is caught in a rotating blade does not occur. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a shredder for finely cutting an object to be cut such as paper or a compact disk, and more particularly to a shredder that can prevent an injury caused by putting a finger or the like into an input port of the object to be cut.

For example, Patent Document 1 discloses a technique for preventing the occurrence of injury due to an accidental insertion of a finger into a shredder insertion slot.
The technique disclosed in Patent Document 1 is provided with a proximity sensor that detects the presence of a person or an animal in the vicinity of an input port in order to detect an undesirable object such as a human finger entering the input port of the shredder. That's it.
JP-A-2005-95898

However, the technique disclosed in Patent Document 1 requires a proximity sensor that can distinguish and detect an undesirable object such as a person or an animal and an object to be cut, and depending on the position of the sensor, There is a risk that it will also react to the operator's hand when inserting the object to be cut, which may hinder the cutting work.

In particular, in a shredder configured to automatically rotate the rotary blade at the same time as the object to be cut is inserted, a separate sensor is required to detect the insertion of the object to be cut. In addition to being complicated, it is difficult to adjust the mounting position. For this reason, since manufacturing cost increases and a product price becomes high, it is difficult to spread as a shredder for home use.
Accordingly, an object of the present invention is to provide a highly safe shredder that can surely prevent insertion of a finger or the like into a slot while having a simple structure.

  In order to solve the above-mentioned problems, the present invention provides a shredder that cuts an object to be cut inserted from an insertion port with a rotary blade and discharges it into a waste storage box, and covers the insertion port with a lid, the lid and the shredder main body, A gap with a width that does not allow an infant's finger to enter is provided, and the rotary blade cannot be driven by the displacement of the lid.

A guide member for guiding insertion of the object to be cut into the gap may be provided in the shredder body.
In this case, the guide member may be attached in the vicinity of the gap in a state where the guide member is directed obliquely upward within a range of 10 degrees to 50 degrees.
Moreover, you may set the introduction surface which goes to the insertion port from the attachment part to the said shredder main body of the said guide member smaller than the inclination-angle of the said guide member.
Furthermore, a smooth surface from the guide member toward the charging port may be formed.

Further, in the shredder that cuts the workpiece to be cut inserted from the insertion port with a rotary blade and discharges it to the waste storage box, the insertion port is covered with a lid, and a slit having a width that does not allow an infant's finger to enter is provided in the lid, You may comprise so that a rotary blade becomes impossible to drive by the displacement of a lid | cover.
In the present invention, a limit switch is provided in the vicinity of the insertion port, and a projection is provided on the lid to press the operation portion of the limit switch when the lid is closed. The rotary blade may be driven by pressing.

  The shredder according to claim 1 covers the inlet of the shredder with a lid, and provides a gap with a width that does not allow an infant's finger to enter between the lid and the shredder body, so that the rotary blade becomes inoperable due to the displacement of the lid. When the lid is moved by inserting a finger into the gap between the shredder body and the lid, or when the lid is opened, the rotary blade is not driven.

For this reason, even if an infant etc. open | releases a lid | cover and inserts a finger in a slot, the situation where a finger is caught in the rotating blade does not arise. Thus, it is possible to prevent the occurrence of injuries caused by accidentally inserting a finger into the insertion slot.
In addition, since the inlet is always shielded, it is possible to prevent accidents such as a tie worn by a person during cutting work being sucked into the inlet and caught in the rotary blade. Is further enhanced.

On the other hand, a sheet-like material such as paper can be inserted into the insertion port through the gap between the lid and the shredder body, so that a cutting function as a shredder is ensured.
In particular, if the gap is designed to have a width corresponding to the cutting ability of the rotary blade, the lid will be displaced when the workpiece is inserted into the gap beyond the number of sheets that can be cut, so before the workpiece reaches the rotary blade. In addition, the rotary blade can be made inoperable. Thereby, it is possible to prevent the object to be cut from being bitten by the rotary blade, and to improve the durability of the rotary blade.

In the present invention, “the width that an infant's finger cannot enter” is designed in consideration of the size of a finger of a child about 1 year old. In addition, “making the rotating blade incapable of driving” includes stopping the rotating blade that is rotating. For example, a design in which the main power supply of the shredder is turned off, or a design in which the motor driving circuit is turned off. Etc. can be adopted. Further, the lid may be configured to be opened by rotating with respect to the shredder body, or may be configured to be opened by sliding.
In the invention according to claim 2, since the guide member is provided in the shredder body, the object to be cut can be smoothly inserted into the gap.

In the invention according to claim 3, since the guide member is inclined within a range of 10 degrees to 50 degrees, the object to be cut can be inserted into the gap with a natural posture in the cutting operation. The guide member may be a linear inclined surface or a curved inclined surface.

In the invention according to claim 4, since the inclination angle of the introduction surface from the mounting portion of the guide member toward the insertion port is set to be smaller than the inclination angle of the guide member, an infant or the like should slide the hand on the guide member. Even in such a case, it is possible to prevent the finger from entering in the vicinity of the gap, which is the mounting portion of the guide member, or to reduce the speed of entry. Further, since the guide member has a larger inclination, the finger enters the gap with an angle, and the displacement amount of the lid when entering the gap can be increased. Thus, the shredder lid can be reliably displaced in a gap having a width smaller than that of the infant's finger.

  In the invention according to claim 5, since a smooth surface from the guide member toward the insertion port is formed, the object to be cut inserted from the gap is smoothly guided to the insertion port, and the cutting operation is smoothly advanced. be able to.

In the invention according to claim 6, the slot is covered with a lid, a slit having a width that does not allow an infant's finger to enter is provided in the lid, and the rotary blade cannot be driven by the displacement of the lid. When it is opened, the rotary blade is not driven.
For this reason, even if the lid is opened and the finger is inserted into the insertion slot for mischief or maintenance of the child, a situation where the finger is caught in the rotating blade does not occur.

On the other hand, a sheet-like material such as paper can be inserted into the inlet of the shredder through a slit provided in the lid, so that a cutting function as a shredder is ensured.
In the invention according to claim 7, since the limit switch is provided in the vicinity of the insertion port and the projection for pressing the limit switch is provided on the lid, the displacement of the lid is detected and the rotary blade is driven by a device having a simple configuration. It becomes possible to make it impossible.

  A preferred embodiment of the present invention will be described with reference to the accompanying drawings. In addition, embodiment is not limited to the following forms, Other aspects are possible if the subject of this invention can be solved.

FIG. 1 is a perspective view showing a shredder according to a first embodiment of the present invention. The shredder 1 cuts a sheet-like object to be cut such as paper or a compact disk, and includes a shredder body 2, a guide member 3, and a lid 4.
As shown in FIG. 2, the shredder body 2 is configured by housing a cutting portion 6 that performs a cutting action and a waste collection box 7 inside a vertically long rectangular parallelepiped housing 5.

The front surface of the housing 5 is constituted by a door 8 that is rotatably attached to one side edge portion. When the door 8 is opened, the waste collection box 7 is accommodated in the lower part of the cutting part 6 formed in the upper part of the housing so as to be drawn forward.
On the upper surface of the housing 5, there is provided an insertion port 9 into which the cut paper is inserted. As shown in FIG. 3, the insertion port 9 is formed between an introduction surface 10 that is a smooth curved surface from the front side of the housing 5 and curved in a funnel shape, and a rear wall surface 11 that descends vertically from the upper surface of the housing. It is a slit-shaped opening.

A pair of rotary blades 12 and 12 for performing a cutting action are disposed below the opening. The rotary blades 12 and 12 are provided with a number of sharp cutting blades on the peripheral surface of the cylindrical body, and the two cylindrical bodies are arranged in parallel horizontally so that the cutting blades face each other. This part is rotatably supported by frames provided on both side surfaces of the housing 5.
A sensor 13 is attached above the rotary blades 12 and 12 (for example, the wall surface of the slot 9). When the sensor 13 detects the insertion of the cut paper, a drive motor (not shown) is operated. The rotary blades 12 and 12 are configured to rotate.
The drive motor for rotating the rotary blades 12, 12 is connected to a power supply circuit that is closed by turning on a power switch 14 provided on the upper surface of the housing 5.

A small hole is provided at a predetermined position on the upper surface of the housing 5, and the plunger tip 21 of the limit switch 20 appears from the small hole. The plunger tip 21 functions as an operating portion of the limit switch 20, and the plunger tip 21 is pressed by a projection 41 of the lid 4 in the housing as shown in FIGS. 4 and 5. The limit switch 20 is attached at such a position.
The limit switch 20 is connected to a power supply circuit. When the plunger tip 21 is pressed, the power supply circuit is closed, and the rotary blades 12 and 12 are in a driveable state. Become.

The cutting part 6 is composed of a series of devices for driving the rotary blades 12 and 12, such as the rotary blades 12, 12, the drive motor, the sensor 13, the limit switch 20, and the power supply circuit. A front wall surface 14 that appears when the door 8 of the housing 5 is opened, and a shutter 15 that shields between the cutting portion 6 and the waste collection box when the door 8 of the housing 5 is opened and the waste collection box is pulled out. Protected against direct contact by the cutting operator.

A guide member 3 is formed at the upper end of the door 8 on the front of the housing. This guide member 3 is for facilitating the insertion of an object to be cut into the gap 30 between the shredder body 2 and the lid 4, and is in the range of 10 to 50 degrees, preferably 20 to 40 degrees. In the example, it is attached obliquely upward at an inclination angle α of 30 degrees (see FIG. 6).

As shown in FIGS. 1 and 2, the guide member 3 is attached to the door 8 at a position slightly lower than the upper surface of the housing 5, and between the upper surface of the housing 5 and the mounting portion of the guide member 3. A gap 30 is formed in the gap. The gap 30 is set to a width that does not allow an infant's finger to enter, and is preferably set to a range of 1 mm to 4 mm. In this embodiment, it is set to 2.5 mm.

By inserting the object to be cut into the gap 30, the object to be cut reaches the insertion port 9 through the introduction surface 10 and can be cut. Therefore, the width of the gap 30 depends on the cutting ability of the rotary blades 12 and 12. By setting the width, the rotary blades 12, 12 can be stopped when an object to be cut exceeding the cutting ability of the rotary blades 12, 12 is inserted into the gap 30. For example, when a copy sheet having a thickness of 0.1 mm is cut and the number of sheets that can be cut by the rotary blades 12 and 20 is 20, the width of the gap 30 may be set to about 2 mm.

As shown in FIG. 6, the attachment portion of the guide member 3 is continuous to the insertion port 9 via the introduction surface 10 on the upper surface of the housing, and the inclination angle when moving from the attachment portion of the guide member 3 toward the introduction surface 10. β is set smaller than the inclination angle α of the guide member 3.
In this way, by setting the inclination angle β of the introduction surface 10 from the mounting portion of the guide member 3 toward the insertion port 9 to be smaller than the inclination angle α of the guide member 3, an infant or the like should reach the guide member 3 by hand. When sliding, the entry of the finger can be stopped or the entry speed can be reduced at a point where the inclination changes (that is, the attachment portion of the guide member 3 between the shredder body 2 and the lid 4).
Further, since the guide member 3 has a larger inclination angle, the finger enters the gap 30 at an angle, so that the displacement amount M of the lid 4 at that time can be increased. Thus, the shredder lid 4 can be reliably lifted in the gap 30 set smaller than the width of the infant's finger.

On the upper surface of the housing, a lid 4 is provided to cover the insertion port 9. The lid 4 is pivotally attached to pivots provided on both sides of the upper surface of the housing 5, and the pivot end 40 is attached to the front end of the housing upper surface (that is, the guide member 3 is attached). To the position). The lid 4 is formed of a synthetic resin flat plate, and is preferably made of a transparent member so that a state in which the object to be cut is cut can be visually recognized.
On the lower surface of the lid 4, a protrusion 41 that can press the flanger tip 21 of the limit switch 20 is provided.

The usage method of the shredder 1 of the said structure is demonstrated.
When performing the cutting operation, the object to be cut is placed on the guide member 3. Then, the object to be cut slides down the inclined guide member 3, passes through the gap 30 between the housing 5 and the lid 4, is guided to the introduction surface 10, and reaches the insertion port 9. At this time, the presence of the object to be cut is detected by the sensor 13, and the rotary blades 12, 12 provided below the insertion port 9 are driven. Then, when the object to be cut passes between the rotary blades 12 and 12 in the rotating state, the object to be cut is finely cut while being wound around the rotary blades 12 and 12.

In this case, if the gap 30 is designed to have a width corresponding to the cutting ability of the rotary blades 12, 12, the lid 4 is displaced when an object to be cut is inserted into the gap 30 beyond the number of pieces that can be cut. Before the material to be cut reaches the insertion port 9, the rotary blades 12 and 12 are not driven. As a result, it is possible to prevent a situation in which the object to be cut is caught in the rotary blades 12, 12, so that the durability of the rotary blades 12, 12 can be improved.

In the unlikely event that an infant or the like opens the lid 4 while trying to put a finger into the insertion slot 9 during the cutting operation, the rotary blades 12 and 12 cannot be driven by the action of the limit switch 20 due to the displacement of the lid 4. When the finger is inserted into the insertion slot 9, the rotary blades 12 and 12 are already stopped. For this reason, the situation where a finger is caught in the rotary blades 12 and 12 does not occur, and there is no possibility that a major accident such as cutting of the finger occurs.
In addition, since the insertion port 9 is always shielded, a situation in which a tie or the like worn by the worker during the cutting operation is sucked into the insertion port 9 does not occur.

In the present embodiment, the limit switch 20 is provided in the vicinity of the insertion port 9, and the protrusion 4 that presses the operation unit of the limit switch 20 is provided on the cover 4, thereby detecting the displacement of the cover 4. However, any device that can detect the displacement of the lid 4 may be used. In addition, the sensor and the switch may be disposed at a position where a large amount of displacement can be obtained by the movement of the lid 4, and can be appropriately selected according to the structure of the lid 4 and the shredder body 2. For example, instead of directly providing the projection 41 for pressing the limit switch 20 on the lid 4, another member may be attached to the lid 4 and the projection 41 may be provided on the member.

Moreover, although the cover 4 in this embodiment used what rotates with respect to the shredder main body 2, a slide-type cover may be sufficient. Also in this case, a position sensor such as a limit switch is attached at a position where the displacement of the lid can be detected.
In the present embodiment, the guide member 3 is configured in a linear shape, but may be curved as shown in FIG. Moreover, as shown in FIG.7 (b), the guide member 3 of the shredder main body 2 may be horizontal, and does not necessarily need to provide.

  In addition, as shown in FIG. 8, a continuous smooth surface may be formed from the guide member 3 toward the insertion port 9, and in this way, the object placed on the guide member 3 may be formed. The cut material is smoothly guided to the insertion port 9 through the introduction surface 10, and the cutting operation can be performed smoothly.

Next, a shredder 1 ′ according to a second embodiment of the present invention will be described with reference to FIG.
This shredder 1 ′ is the first embodiment except that it does not have a guide member, there is no gap between the lid and the shredder body, and a slit 42 is provided in the lid 4 ′ instead. It is the same as the shredder according to the form.
Hereinafter, the same components as those of the shredder of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

The shredder 1 ′ of the present embodiment is composed of a shredder main body 2 and a lid 4 ′. The housing 5 and the internal structure of the shredder main body 2 have the same configuration as that of the first embodiment. The upper end portion of the door 8 on the front side of the housing reaches the upper surface portion of the housing, and no guide member is attached to the door 8.
On the upper surface of the housing 5, a lid 4 ′ that covers the inlet 9 is provided. The lid 4 ′ is rotatably attached to both side portions of the upper surface of the housing 5, and the rotating end portion 40 ′ extends to the front end portion of the housing upper surface.

The lid 4 ′ is formed of a synthetic resin flat plate, and a slit 42 having the same length as the inlet 9 is formed at a position directly above the inlet 9 when the lid 4 ′ is closed. Yes. The slit 42 is set to a width that does not allow an infant's finger to enter, and is preferably set to a range of 1 mm to 4 mm. In this embodiment, it is set to 2 mm.
On the lower surface of the lid 4 ′, a protrusion 41 ′ capable of pressing the plunger tip 21 of the limit switch provided in the housing of the shredder body 2 is provided.

A method of using the shredder 1 ′ having the above configuration will be described.
When performing the cutting operation, the object to be cut is inserted into the slit 42 of the lid 4 ′ from directly above. Then, an object to be cut is inserted into the insertion port 9 located immediately below. At this time, insertion of an object to be cut is detected by a sensor provided on the wall surface of the insertion port, and a rotary blade provided below the insertion port 9 is driven. Then, when the object to be cut passes between the rotating blades in the rotating state, the object to be cut is finely cut while being wound around the rotary blade.

In the event that an infant or the like opens the lid 4 'during the cutting operation in order to put a finger into the insertion slot 9, the rotary blade becomes inoperable due to the action of the limit switch due to the displacement of the lid 4'. For this reason, the situation where a finger is caught in the rotary blade does not occur, and there is no possibility of a major accident such as cutting of the finger.
In addition, since the insertion port 9 is always shielded, a situation in which a tie or the like worn by the worker during the cutting operation is sucked into the insertion port 9 does not occur.

In the shredder 1 ′ of the present embodiment, the object to be cut is inserted into the slit from directly above the insertion port 9, and is directly introduced into the insertion port 9 immediately below. It is not necessary to form on the upper surface, and the structure becomes even simpler. As a result, a highly-safe shredder can be manufactured simply by installing a lid with a slit on an existing shredder and attaching parts such as a limit switch that can detect the displacement of the lid and disable the rotary blade. It becomes possible to do.

  The present invention can be used for commercial and household shredders.

It is a perspective view which shows the shredder which concerns on 1st Embodiment of this invention. It is a schematic sectional drawing which shows the state which cut | disconnected the front center part of the said shredder with the plane parallel to a side surface. It is a perspective view which shows the state which open | released the cover of the said shredder. It is a partial schematic sectional drawing which shows the state cut | disconnected along the right side surface of the said shredder. In FIG. 4, it is a partial schematic sectional drawing which shows the state which the cover displaced. It is explanatory drawing which shows the inclination state of a guide member and an introduction surface. It is explanatory drawing which shows the modification of a guide member. It is explanatory drawing which shows the modification of a guide member and an introduction surface. It is a perspective view which shows the shredder which concerns on 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1 '... Shredder 2 ... Shredder main body 3 ... Guide member 4, 4' ... Cover 5 ... Housing 6 ... Cutting part 7 ... Waste collection box 8 ... Door 9 ... Inlet 10 ... Introducing surface 11 ... Rear wall 12 ... Rotating blade 13 ... Sensor 14 ... Power switch 20 ... Limit switch 21 ... Plung tip ( Operation part)
30 ... Gap 40 ... Rotating end 41, 41 '... Protrusion 42 ... Slit

Claims (7)

  In the shredder (1) for cutting the workpiece to be cut inserted from the inlet (9) with the rotary blades (12, 12) and discharging it to the waste storage box (7), the inlet (9) is covered with the lid (4). A gap (30) is provided between the lid (4) and the shredder body (2) so that the infant's finger cannot enter. The rotary blades (12, 12) cannot be driven by the displacement of the lid (4). A shredder characterized by being configured to be.   The shredder according to claim 1, wherein a guide member (3) for guiding insertion of an object to be cut into the gap 30 is provided in the shredder body (2). The shredder according to claim 2, wherein the guide member (3) is attached in the vicinity of the gap (30) in a state of being inclined obliquely upward in a range of 10 to 50 degrees.   The introduction surface (10) from the attachment portion of the guide member (3) to the shredder body (2) toward the insertion port (9) is set to be smaller than the inclination angle of the guide member (3). The shredder according to claim 2 or 3, wherein   The shredder according to any one of claims 2 to 4, wherein a smooth surface is formed from the guide member (3) toward the insertion port (9).   In the shredder (1) that cuts the workpiece to be cut inserted from the inlet (9) with the rotary blades (12, 12) and discharges it to the waste storage box (7), the inlet (9) is covered with a lid (4 '). The lid (4 ′) is provided with a slit (42) having a width that does not allow an infant's finger to enter, and the rotary blades (12, 12) cannot be driven by the displacement of the lid (4 ′). Shredder characterized by that. A limit switch (20) is provided in the vicinity of the inlet (9), and the operation part (21) of the limit switch (20) is pressed against the lid (4) when the lid (4) is closed. The projecting portion (41) is provided, and the projecting portion (41) presses the operation portion (21) so that the rotary blades (12, 12) can be driven. The shredder according to any one of claims 6 to 6.

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