JP2014171980A - Shredder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shredder which has high safety, which does not electrify a sheet plate itself by ions generated from an ion generator, and which does not cause electric shock when a person touches a box main body even when grounding is failed.SOLUTION: Provided is a shredder configured to perform neutral static elimination of shredded dusts which are electrified by being shredded by radiation of ions. An electric insulation treatment is performed on front and rear surfaces of a shred mechanism part fixing sheet plate 8 to which an ion generator 9 for removing static electricity of the shredded dusts or the like during falling and passing of the shredded dusts, for preventing electrification by ions.

Description

  The present invention relates to a shredder having a function of efficiently removing static electricity from shredded waste generated when shredding a shredder that shreds unnecessary paper, plastic film, and the like.

Conventionally, shredders that shred waste paper and plastic films that are no longer needed are charged by friction and deformation that occurs when shredding with a cutter in shredded parts, and static electricity is generated in shredded waste, and shredders are dropped during dropping. It often adheres to the inner periphery or adheres to shredded waste storage bags and shredded waste boxes, which often takes time and inconveniences in recovery and disposal operations. In order to remove the harmful effects of static electricity from shredded waste, a shredder with a function for efficiently removing static electricity from shredded waste has been proposed.

Japanese Patent No. 4811696

  The shredder disclosed in Patent Document 1 is provided with a shredded portion at an upper position of the box body, and a shredder storage box is disposed below the shredded portion in the box body. In the shredder in which the shredded shredded material falls and is stored in the shredded waste storage box, the shredder includes an ion generator and an air blower at an intermediate position between the shredded portion and the shredded waste storage box. A static eliminator is provided to irradiate ions with the air blown from the air blower toward the falling passage area of the charged shredded debris to neutralize and remove the debris.

The box body is formed of a thin metal plate, and the ion generator that generates ions for neutralizing and removing the charged shredded waste uses a highly rigid metal plate to fix the shredding mechanism. It is installed in the formed shredder mechanism part fixing sheet metal, and the shredder mechanism part fixing sheet metal is attached inside the box body to constitute a shredder. The box body is used as an electrical ground plane.

In the shredder having the above-described configuration, there is no problem if the charged electric charge is released by grounding. However, if the grounding is neglected, the ion generator is installed by the ions generated from the ion generator. The sheet metal for fixing the cutting mechanism part itself is charged, and the box body that is integrally mounted is also charged. In some cases, the amount of charge reaches 2 kV or more, which is generally said to feel electric shock, and if you touch the shredder's box body in that state, there is a safety problem such as electric shock. .

  The present invention has been made in view of the above points, and even if the box body is touched with a hand so that the sheet metal on which the ion generator is installed is not charged by ions generated from the ion generator, no electric shock occurs. It aims to provide a safe shredder.

In the invention described in claim 1, shredding means for shredding waste paper, means for feeding waste paper to the shredding means, shredded scraps shredded by the shredding means, etc. are dropped. A shredder having a shredder storage portion, a shredder, a feeding unit, and a metal housing in which the shredder storage portion is installed. An ion generator for removing static electricity such as shredded waste is installed in the passage, and a member for installing the ion generator is electrically insulated.

In a second aspect of the invention, the member on which the ion generator is installed is a sheet metal that is pre-coated or coated with an insulating paint and is electrically insulated.

According to a third aspect of the present invention, the member on which the ion generator is installed is a sheet metal that has been subjected to the electrical insulation treatment around the ion generator.

  In the invention according to claim 4, the range to which the electric insulation treatment is performed is a region covering the periphery of the ion generator in the ion outlet direction.

In the invention described in claim 5, the range for performing the electrical insulation treatment is characterized in that a sphere radius of 30 mm is the minimum range centering on the ion outlet of the ion generator.

  According to the present invention, the front and back surfaces of the shredder mechanism fixing sheet metal 8 in which the ion generator 9 for removing static electricity such as shredded waste is disposed in the falling passage of shredded waste and the like are subjected to an electrical insulation treatment and the ions Therefore, even if the grounding is neglected, it is possible to provide a highly safe shredder that does not receive electric shock by touching the box body.

The perspective view of the shredder of this embodiment The perspective view which shows the state in which the cover of the shredder of FIG. 1 was opened. 1 is a vertical sectional view of the shredder of FIG. The perspective view inside a shredder for demonstrating the installation state of an ion generator The perspective view inside a shredder for demonstrating the installation state of a shredding mechanism part The perspective view of the sheet metal for shredding mechanism part fixing which installs an ion generator and a shredding mechanism part

  Preferred embodiments of the present invention will be described below with reference to the drawings. Note that this embodiment is merely an example, and the present invention is not limited to this.

    As shown in FIGS. 1 to 3, the shredder 1 includes a rectangular parallelepiped casing 2 (box body) formed of sheet metal and a rectangular parallelepiped in which waste paper provided on the casing 2 is disposed. A cover 3 is provided so as to be openable and closable so as to cover the waste paper storage space 4 and the waste paper storage space 4. The cover 3 is provided with an external insertion port 31 for waste paper. Further, an auto feed mechanism 5 for guiding the waste paper downward is configured at the bottom of the waste paper storage space 4, and a shredding mechanism section 6 for shredding the waste paper is provided further below the auto feed mechanism 5. It has been. Below the shredding mechanism 6 is a shredded waste storage box 7 for storing shredded waste.

  As shown in FIGS. 2 and 3, the auto-feed mechanism 5 is provided with a slit-like insertion port 51 near the center of the bottom of the waste paper storage space 4 through which the waste paper enters in a direction perpendicular to the longitudinal direction of the waste paper. It has been. The guide rollers 62 having an axis parallel to the slit direction at symmetrical positions across the slit-shaped insertion port 51 are arranged in pairs at a predetermined interval in the axial direction of the shaft 67 serving as a rotation support shaft. Are arranged in series.

As shown in FIG. 3, the shredding mechanism 6 is equipped with a pair of shredder cutters 61 arranged with an axis parallel to the central axis of the guide roller 62. A gap between the two shredder cutters 61 is located immediately below the insertion port 51 described above. The shredder cutter 61 is rotationally driven by the motor 64 and the gear device 65 (FIG. 5), but the guide roller 62 and the shredder cutter 61 on the same side across the insertion port 51 are synchronously driven by the transmission gear and are in the same direction. Rotate. Waste paper that has passed through the insertion port 51 is guided into the gap between the shredder cutters 61 by the guide roller 62 and is shredded. The shredder cutter 61 is covered with a cover 63 formed by bending a thin sheet metal for safety.

The operation of the shredder 1 configured as described above will be described. When the amount of waste paper is small, the waste paper is inserted from the external insertion port 31 formed in the cover 3. The inserted waste paper passes through the insertion guide portion 36, passes between the guide rollers 62, is guided to the insertion port 51, and is shredded by the shredding mechanism portion 6. (Figure 3)

Next, a case where a large amount of waste paper is shredded will be described. As shown in FIGS. 2 and 3, the waste paper is disposed in the waste paper storage space 4 and the cover 3 is closed. At this time, the lower surface of the waste paper near the center of the waste paper storage space 4 is slightly raised by the guide roller 62, and the upper surface of the bundle of waste paper is pressed by the paper press pad 33 and the waste paper The central portion is pressed by the pressure paper portion 37 positioned inside the pressing roller 32. As a result, the waste paper bulges in an arc shape toward the insertion port 51 and easily enters the insertion port 51.

  When the motor is driven in this state, the lowermost layer waste paper is drawn into the insertion port 51 by the guide roller 62, is folded in two, enters the shredder cutter 61 below the insertion port 51, and is shredded. This pulling operation is continuously performed, and the paper is folded into two in order from the lowermost waste paper and is shredded by the shredder cutter 61.

As shredding progresses and the height of the bundled waste paper becomes smaller, the pressure spring 37 and the pressure roller 32 and the paper press pad 33 are urged downward by the coil spring 35 of the cover 3, so the waste paper Will always be pressed. The shredded paper waste is stored in a shredded waste storage box 7 below it.

  Next, a description will be given of a structure for neutralizing and neutralizing by irradiating shredded chips charged by shredding with ions generated from the ion generator 9 according to the present invention. As shown in FIG. 5, the shredding mechanism section 6 is installed and fixed to a shredding mechanism section fixing sheet metal 8 formed of a thin sheet metal and joined to the upper inner surface of the housing 2 by, for example, welding. As shown in FIG. 6, the installation surface 84 of the shredder mechanism portion fixing sheet metal 8 is provided with a rectangular shredder dropping port 81, and the periphery of the shredder dropping port 81 is vertically above the installation surface. A rising piece 82 is formed in the direction. The rising piece 82 serves as an attachment guide for the shredding mechanism 6 and increases the rigidity of the installation surface 84. Further, a welding piece 85 is formed on the outer edge of the installation surface 84 by bending in the direction opposite to the rising piece 82 for welding with the inner surface 21 (FIG. 4) of the casing 2 described above.

A notch 83 is formed in one piece 82 a of the rising piece 82, and the ion generator 9 has the shredder mechanism portion fixing sheet metal 8 so that the ion outlet faces the notch 83 as shown in FIG. 4. As shown in FIG. 3, the shredded waste falling from the shredder cutter 61 is irradiated with ions to neutralize and remove the shredded waste charged by shredding.

In this embodiment, the ion generation method of the ion generator 9 uses a DC ionizer that applies pulsed DC high voltage to generate corona discharge and generate positive ions. Since there is little distance dependency and it can irradiate a wide area by a windless operation without using air or a fan, there is a feature that it is possible to eliminate static electricity without causing dust blowing or dust winding.

  The shredder mechanism portion fixing sheet metal 8 is made of a coated steel plate pre-coated on the front and back surfaces with an electrically insulating paint. As shown in FIG. 4, some of the positive ions generated by the ion generator 9 are adsorbed to the rising piece 82a in the vicinity of the installation of the ion generator 9, and the shredder mechanism fixing sheet metal 8 is charged. There was a problem that the housing 2 joined to the mechanism portion fixing sheet metal 8 is also charged. For this reason, the sheet metal 8 for fixing the shredding mechanism portion is prevented from being charged by using a coated steel plate that has been pre-coated with an electrically insulating paint and subjected to insulation treatment.

  In the present embodiment, the sheet metal 8 for shredding mechanism portion fixing is made of a coated steel plate pre-coated with an electrically insulating paint, so that the entire front and back surfaces of the shredder mechanism portion fixing sheet metal 8 are insulated. Yes. However, the present invention is not limited thereto, and a configuration in which the periphery of the ion generator 9 in the direction of the ion outlet 91 is covered with an electrical insulator such as a resin material, or a configuration in which an insulating tape is similarly attached may be used. Moreover, the structure which apply | coats the coating material which has electrical insulation, and dries may be sufficient. Here, the periphery of the ion generator 9 is a range of a sphere radius (sr) of 30 mm centered on the ion outlet 91 of the ion generator 9 (FIG. 6) from the result of the experiment. It has been found that an antistatic effect can be obtained by applying electrical insulation treatment to the front and back surfaces of the sheet metal.

DESCRIPTION OF SYMBOLS 1 Shredder 2 Case 3 Cover 4 Waste paper storage space 5 Auto feed mechanism 6 Shredding mechanism part 7 Cutting waste storage box 8 Shredder mechanism part fixing sheet metal 9 Ion generator

Claims (5)

Shredding means for shredding waste paper,
A means for feeding waste paper to the shredding means;
A shredded waste storage section in which shredded waste or the like shredded by shredding means is dropped and stored; In shredder
An ion generator for removing static electricity such as shredded waste is installed in a falling passage of shredded waste from the shredding means, and a member for installing the ion generator is electrically insulated. Shredder to do. The member for installing the ion generator is:
The shredder according to claim 1, wherein the shredder is a sheet metal that is pre-coated or coated with an insulating paint and is electrically insulated. The shredder according to claim 1 or 2, wherein the member for installing the ion generator is a sheet metal that has been subjected to the electrical insulation treatment around the ion generator.   The shredder according to any one of claims 1 to 3, wherein a range in which the electric insulation treatment is performed is a region covering a periphery of the ion generator in an ion outlet direction. The shredder according to any one of claims 1 to 4, wherein a range in which the electrical insulation treatment is performed is a minimum range of a sphere radius of 30 mm centering on an ion outlet of the ion generator.

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