JPH0448940A - Shredder - Google Patents

Abstract

PURPOSE:To prevent entrainment of shred paper by providing an entrainment prevention plate for a cutting blade which has a slit capable of passing the circular knife of a cutting blade one sheet by one sheet between a feed roller and the cutting blade and further providing the entrainment prevention plate for a feed roller along the external peripheral face in the downside of the feed roller. CONSTITUTION:An entrainment prevention plate 11 for a cutting blade described hereunder is provided between a feed roller 8 and the cutting blade 10. In the said plate 11, slits 29 are provided to a slit plate 28 made of a thin steel sheet in coincidence with the interval of a circular knife 9. This slit plate 28 is fixed to a holder 30 and formed. The circular knife 9 is fixed up so that one part thereof is projected from the slits 29 of the slit plate 28. An entrainment prevention plate 12 for a feed roller is provided to the lower part of the feed roller 8. This plate 12 is provided in a range of the whole length of the feed roller 8 along the axis thereof so that the tip of the plate 12 nearly touches the external periphery of the feed roller 8. Paper shred by the cutting knife 10 is guided by the said prevention plate 11 and plate 12 and extruded in the lower direction.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a shredder that prevents cut paper strips from getting caught up in feeding rows and cutter blades, and which is miniaturized.

(Prior art) - As shown in FIG. 9, a conventionally used shredder is provided with a large number of cutter blades 2 having edges 1 formed thereon at equal intervals in the axial direction, and each cutter blade 2 is connected to the other cutter blade. Insert it between 2 and rub the edges together, and
As shown in Figure O, the cutter blade 2 is rotated in the direction of the arrow, and the paper 3 is cut at the point A by the shearing force of the edge 2. However, in this shredder, the paper is cut with the shearing force of the edge, so a considerably large shearing force is required at the time of cutting. For that purpose, cutter blade 2
The power required to rotate the shredder increases, the power source becomes large, the shredder becomes large, and it takes up a large installation space to be used as a household shredder, making it inappropriate to use this shredder for household use. It is. Therefore, a miniaturized shredder that can be used for household use and meets social needs has already been developed (Japanese Patent Application No. 1-28284).

As shown in FIG. 7, this shredder has a feed port 8 formed by mounting a large number of discs 4 on a shaft 7 via spacers 6 and forming grooves 5 at equal intervals, and a recess in the feed roller 8. Groove 5
It is mainly composed of a cutter blade lO having a circular blade 9 with a cutting edge inserted therein.

As shown in FIG. 8, the shredder cuts the paper by making the peripheral speed Vl of the circular blade 9 faster than the peripheral speed V2 of the feed roller 8, so that the supplied paper P is passed through the groove 5. The shredder is miniaturized by cutting the center of the shredder with the cutting edge of the circular blade 9 and reducing the power required for cutting.

(Problem to be Solved by the Invention) In the above-mentioned shredder, the paper is cut in the center of the paper passed through the concave groove 5 with the cutting edge of the circular blade 9, so the cut paper strip is rotating. The rotational force of the cutter blade 10 often causes the circular blades 9 to be caught in the gap between the circular blades 9 or into the concave groove 5 of the rotating feed roller 8. When the paper strips cut in this way are rolled up, there is a problem in that the paper strips are wound around the feed roller 8 and the cutter blade 10, making them difficult to rotate. Another problem is that when a strip of paper is wrapped in this way, it is difficult to remove it, reducing the value of the product.

The present invention provides a shredder that prevents cut paper from being caught in the shredder and is downsized.

(Means for Solving the Problems) The means according to the present invention for solving the above problems includes providing a feed roller in which a large number of grooves are formed at equal intervals in the axial direction on the outer peripheral surface of a cylindrical body, and A cutter blade having a plurality of circular blades with cutting edges inserted into grooves is provided opposite to the feed roller, and a cutter blade entrainment prevention plate having a slit through which each circular blade of the cutter blade can be inserted is provided. The present invention is characterized in that a feed roller entrainment prevention plate is provided between the feed roller and the cutter blade and along the lower outer peripheral surface of the feed roller.

(Function) Since the present invention is configured as described above, the paper fed between the feed roller and the cutter blade is passed through the concave groove of the feed roller and is then passed through the slit of the cutter blade entrainment prevention plate. It is cut one by one using a cutter blade with a protruding cutting edge. This cutting is not done by shearing force but by the cutting edge of the circular blade, so the force required for this cutting is small. The paper cut into strips is then cut into strips by the cutter blades, which protrude from the slits one by one to close the space between the cutter blades. It is guided by an entrainment prevention plate and is discharged downward without being entrained.

(Example) An example of the present invention will be described below. In FIG. 1, the feed roller 8 and the cutter blade IO are provided with their axes aligned horizontally and facing each other. A cutter blade entrainment prevention plate 11, which will be described later, is provided between the feed roller 8 and the cutter blade 0, and a feed roller entrainment prevention plate 12 is provided to cover the lower part of the feed roller 8. Move the feed roller so that the tip of the feed roller entrainment prevention plate 12 is almost in contact with the outer periphery of the feed roller 8! 2 along its entire length. A paper insertion section 15 is formed above the approximately intermediate portion between the feed roller 8 and the cutter blade lO, and a slit i! of this paper insertion section 15 is formed. l! 16 is the feed roller 8 and cutter blade 10
We are at the point of contact with Further, the slit width of this slit portion 16 is determined so as to limit the number of sheets of paper to be fed so that the motor 13 disposed at the upper left of the feed roller 8 will not be overloaded. A battery 14 (dry battery) is disposed below the motor 13. In this way, the casing 17 is formed to accommodate these items, and the lower end 18 of the casing 17 is formed so that it can be placed on top of the trash can 19. A battery cover 20 is provided on the side surface of the casing 17, and the battery 14 can be replaced by inserting a finger into a battery cover opening/closing hole 21 to open the battery cover 20. Further, a push-in opening/closing lid 22 is provided on the side surface of the trash can 19. A bottom plate 23 is provided at the bottom of the trash can I9 so that it can be closed via a bin 27. A lockper 25 is inserted into a hole formed in the bottom plate 23 via a spring 24, and can slide by coming into contact with the tip of the lockper 25. The cutter blade entrainment prevention plate 11 will be described with reference to FIGS. 2 and 3, in which the lock release member 26 is provided.

First, in FIG. 4, the circular blades 9 of the cutter blade 1O are arranged at equal intervals in the axial direction, and are connected to the feed roller 8 and the cutter blade so that the cutting edge of the circular blade 9 is inserted into the groove 5 of the feed roller 8. IO is arranged. Therefore, as shown in FIG. 2, the cutter blade entrainment prevention plate 11 is made by forming slits 28 made of thin steel into an arc shape as shown in FIG. This slit plate 28 is fixed to a holder 30 bent into a groove shape with a fixing member 3I. The cutter blade entrainment prevention plate 11 is assembled so that a part of the circular blade 9 comes out from the slit 29 of the slit plate 28. In FIG. 4, both ends of the shafts 33, 34 of the feed roller 8 and the cutter blade 1O are supported by bearings 32 provided in the casing, and gears 35, 36 are provided at the other ends, respectively. Further, a gear 38 is provided on the shaft 37 of the motor 13.
The driving force of No. 3 is transmitted to the feed roller 8 and the cutter blade IO via gears 38, 36, and 37. As shown in FIG. 5, a handle shaft 40 is provided on the side surface of the casing 17, and the handle 39 is attached to the handle shaft 40 so as to fit into the elongated hole 4I.

As shown in FIG. 6, the slit portion 16 of the paper insertion port 15
An optical switch 44 is provided on the upper surface of the casing 17, and a reversing switch 42 and a power switch 43 for rotating the motor 13 in the reverse direction are provided on the upper surface of the casing 17.

Next, the operation of this embodiment configured as described above will be explained. First, in use, by turning on the power switch 42, the optical switch 44 is turned on, but the motor 13 does not rotate.Then, when paper is inserted into the slit 16, the optical switch 44 is activated, and the motor 13 is rotated and fed. The roller 8 and cutter blade lO rotate. By doing this, even if the power switch 42 is turned on, the motor 1 will not operate unless paper is inserted through the slit 16.
3 does not rotate, so the battery 14 saves power. Furthermore, since the number of sheets of paper inserted is limited by the width of the slit 16, the motor 13 is not overloaded, protecting the motor 13, and eliminating power consumption of the battery 14 due to overload, thereby extending the life of the battery 14. becomes possible. Then, a part of the circular blade 9 of the cutter blade summer 0 comes out one by one from the slit 29 of the slit plate 28 of the cutter blade entrainment prevention ill, so the paper that has been removed by +4 from the slit 16 is While the hook is being passed over the HI 45, its center portion is cut off by the cutter blade 10. When the paper is cut by the cutter blade lO in this way, a frictional force is generated between the circular blade 9 and the paper due to the cut made by the circular blade 9, and this frictional force acts as a force to pull the paper in and the paper is cut into strips. be done. The paper cut into strips in this way is guided downward by the cutter blade entrainment prevention plate 11 which protrudes one circular blade 9 from the slit 29 of the slit plate 28 and closes the space between the circular blades 9. At the same time, it is also guided by the feed roller entrainment prevention plate 12, which is provided so that its tip is substantially in contact with the outer periphery of the feed roller 8, and is pushed downward. This prevents the cut paper strips from getting caught on the right side of the feed roller 8 and the cutter blade IO side, and the feed roller entrainment prevention plate 12 is provided to cover the bottom of the feed roller 8 and the cutter blade IO side. The entrainment prevention plate 11 has the circular blades 9 protruding one by one from the slit 29 to close the space between the circular blades 9, so that the cutter blade 10 is wrapped in the cutter blade entrainment prevention plate grain. It has become.

Even if the trash box 19 is filled with compressed paper that has been pushed downward, the paper that has been cut into strips will not get caught up in the feed roller 8 and the cutter blade 10. This also makes it possible to minimize the internal volume of the trash can 19. By pressing the lock release member 26, the bottom plate 23 is unlocked and the compressed paper is discharged.

(Effects of the Invention) As detailed above, according to the present invention, the cutter blade entrainment prevention plate has a slit plate in which the circular blades of the cutter blade protrude one by one to close the space between the circular blades. This makes it possible to cut the paper with the cutting edge of the circular blade protruding from the slit plate, making it possible to cut the paper with a small amount of force. Entanglement can be prevented. In this way, the cutter blade entrainment prevention plate has the two functions of reducing the power required for cutting and preventing the cut paper strips from being entrained.In addition, the cutter blade entrainment prevention plate has an entrainment prevention IF for the feed roller at the bottom of the feed roller. Since the shredder is provided with a handle, the motor and its drive source can be made smaller to make the shredder body smaller, and furthermore, even if discharged paper is compressed and stuffed into the trash can, it will not get caught, so the trash can can be made smaller. In addition, since there is no shredded paper caught in the motor, there is no overload on the motor, which protects the motor, extends the life of the battery, and eliminates the work of removing paper caused by paper caught in the motor, which greatly improves product value. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention. Fig. 2 is a front view of the cutter blade entrainment prevention plate in Fig. 1, Fig. 3 is a right side view of Fig. 2, and Fig. 4 is a cross section of a part of Fig. 1 showing the cutter blade and feed roller. 5 is an external view of FIG. 1, FIG. 6 is a plan view of FIG. 5, and FIG. 7 is a partially enlarged plan view showing the relationship between the cutter blade and the feed roller. , FIG. 8 is a side view of FIG. 7, FIG. 9 is a partially enlarged plan view of the conventional cutter blade, and FIG.
Figure O is a side view of Figure 9. 8...Feed roller 9...Circular blade lO...Cutter blade II...Cutter blade entrainment prevention plate 12...
Entrainment prevention plate 29 for feed roller - Slit patent applicant Carl Office Equipment Co., Ltd. Fig. 1 8... Supporting roller 9... Circular Illusion 1. Cutter〃111. Feeding air μ for cutter Lower stop plate 12... Feed 1
Insertion H prevention plate 29 for no roll/Slit Diagram O Diagram O Diagram O Diagram 9

Claims (1)

[Claims] (1) A feed roller having a large number of grooves formed at equal intervals in the axial direction on the outer peripheral surface of the cylindrical body is provided, and a cutter blade having a large number of circular blades with cutting edges inserted into the grooves of the feed roller is fed as described above. A cutter blade entrainment prevention plate is provided between the feed roller and the cutter blade, and is provided opposite to the roller and has a slit through which each of the circular blades of the cutter blade can be inserted. A shredder characterized by having an entrainment prevention plate for a feed roller along its length.