JP3240651B2 - Document cutting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document cutter used when discarding paper such as a document.

[0002]

2. Description of the Related Art Recently, important confidential matters have frequently leaked from paper such as documents discarded as garbage. In order to prevent this, a paper cutting machine that cuts discarded paper into small strips or the like to make the contents written on the paper unreadable is widely used in offices and the like.

[0003] The cutting portion of the document cutting machine is formed by passing a plurality of disc-shaped cutters and a plurality of disc-shaped spacers smaller than the cutter one by one through a shaft by the structure of a cutter roll for cutting paper. It is broadly divided into a cutter roll type and an integral cutter roll type in which a groove is formed on a single cylindrical shaft to form a groove portion and a tooth portion. Of these, the integrated cutter roll type is superior in terms of productivity because of low cost and small number of manufacturing steps,
Widely used.

A conventional integrated cutter roll type document cutter will be described below. 4 is a plan view of a cutting portion of a conventional document cutting machine, FIG. 5 is a cross-sectional view of a main portion of an engaging portion of a cutter roll, and FIG. 6 is a vertical cross-sectional view of a main portion of the document cutting machine at the time of cutting. . Reference numeral 1 denotes an integrated first cutter roll having a cylindrical outer shape and cuts paper, and 2 has substantially the same shape as the first cutter roll 1 and engages with the first cutter roll 1. , A motor pulley for transmitting the power of the motor 3 to the drive belt 5, 6.
Is a drive pulley for transmitting the power of the drive belt 5 to a drive gear 7 for rotating the first cutter roll 1, and 8 is for rotating the second cutter roll 2 in a direction opposite to the rotation direction of the first cutter roll 1. A pair of interlocking gears, 9 and 10, a cutter roll mounting plate for holding the first cutter roll 1 and the second cutter roll 2, and 11 a motor 3 and cutter roll mounting plates 9, 10 and the like are arranged and the entire substrate 12 is paper such as a document, 13 is a bite portion between the first cutter roll 1 and the second cutter roll 2,
Reference numeral 14 denotes cutting waste of the paper 12 cut into fine strips at the occlusal part 13, reference numeral 15 denotes a first partition plate for preventing the cutting waste 14 from being wound around the first cutter roll 1, and reference numeral 16 denotes a cutting waste. A second partition plate for preventing the paper from being wound around the second cutter roll 2, a main body case 17 for externally providing a mechanical unit such as the first cutter roll 1, and a paper cover 18 formed on an upper portion of the main body case 17. An inlet for feeding, a is a conventional groove having a rectangular cross section formed by shaving the surface of the first cutter roll 1 or the second cutter roll 2 and having the same width of the opening and the back, and b is the first groove. Paper 12 is formed between grooves a of one cutter roll 1 or second cutter roll 2 and is formed on the surface.
Is a conventional tooth portion that has been knurled to reliably feed the cutter roll, and c is a cutter roll shaft that serves as an insertion portion of the first cutter roll 1 or the second cutter roll 2 into the cutter roll mounting plates 9 and 10. .

[0005] As shown in FIG.
Are arranged such that the groove portions a and the tooth portions b face each other, and each tooth portion b is engaged with the engaging portion 13.

The operation of the conventional document cutting machine constructed as described above will be described below with reference to FIG.

[0007] The document cutting machine is started, and the paper 12 such as a document is input from the input port 18. When the leading end of the paper 12 touches the engaging portion 13, the paper 12 is sent downward while being cut by the rotation of the cutter rolls 1 and 2, and the paper 12 becomes cutting waste 14.
When the cutting waste 14 comes out from the lower end of the occlusion part 13, the cutting waste 1
The wire 4 is wound around the groove a due to the resistance at both ends, but is guided by the first partition plate 15 or the second partition plate 16 to the lower waste storage portion (not shown).

[0008]

However, in the above-mentioned conventional construction, since the difference in paper quality and the difference in clearance due to the variation in the clearance between the cutter rolls causes a difference in the cutting method, the cutting waste 14 is separated from the cutter rolls 1 and 2 by the respective cutter rolls. Partition plate 15, 1
6, there is a problem that the liquid crystal enters between the respective groove portions a and the respective partition plates 15 and 16 from the gap 6. Further, as shown in FIG. 5, since the width of the cutting waste 14 is larger than the width of the inner part of the groove a, the cutting waste 14 is pressed into the groove a.
There is a problem that the cutter rolls 1 and 2 are wound around the groove portions a. Further, if the device is continued to be used in this state, the cut chips 14 wound around the partition plates 15 and 16 deform the partition plates 15 and 16 as shown in FIG. There was a problem that the plates 15 and 16 were scraped and broken, and lacked in durability.

The present invention solves the above-mentioned conventional problems and eliminates the winding of cutting chips around the groove of each cutter roll, thereby preventing deformation and breakage of each partition plate, and has excellent durability. To provide a document cutting machine.

[0010]

In order to achieve this object, a document cutting machine according to the present invention comprises a pair of cutter rolls having grooves and teeth on the surface thereof, one of the cutter rolls and the cutter. A cutting portion for cutting the paper by engaging the other tooth portion of the roll, wherein the width of the biting portion of the tooth portion in the cutting portion is equal and the
The width of the back part of the tooth part is smaller than the width of the occlusion part .

[0011]

With this configuration, even if cutting chips enter between each cutter plate and each groove through the gap between each cutter roll and each partition, the depth of the groove is wider than the width of the cutting chips. Therefore, the cutting waste can move freely and is not wound around the groove. Furthermore, the cutting chips naturally come off from between each partition plate and the groove while being used as it is, so that deformation and breakage of the partition plate can be prevented.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1A is a plan view of a main part of a cutting portion of a document cutting machine according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of a main portion of an engaging portion of a cutter roll. 2 is a longitudinal sectional view of a main part at the time of cutting, and FIG. 3 is an external perspective view of the document cutting machine.

6 is a drive pulley, 7 is a drive gear, 9 is a cutter roll mounting plate, 11 is a base, 12 is paper, 1
Reference numeral 4 denotes cutting waste, 15 denotes a first partition plate, 16 denotes a second partition plate, 17 denotes a main body case, 18 denotes an input port, and c denotes a cutter roll shaft. Numbers are assigned and descriptions are omitted. 19 has a groove A and a tooth B, and the depth of the groove A is 0.5 to 10 mm from the opening of the groove A.
The first cutter roll 20 is preferably expanded so as to be wider by 1 mm to 2.4 mm.
A second cutter roll 22 having substantially the same shape as that of the first cutter roll 19 and arranged so as to engage with the first cutter roll 19 at the engaging portion 21 is an operation switch for activating the motor 3 (not shown). A waste storage portion 24 disposed below the main body case 17 for storing the cutting waste 14 is a front door for taking out the cutting waste 14 from the waste storage portion 23.

As shown in FIG. 1B, the cutter rolls 19 and 20 are disposed such that the groove A and the tooth B face each other, and each tooth B engages with the occlusion portion 21. Groove A
Is expanded so that the depth from the occlusion portion 21 gradually increases.

The operation of the above-configured document cutting machine of this embodiment will be described below with reference to FIG.

The operation switch 22 (not shown) is turned on, the motor 3 (not shown) is started, and each cutter roll 1 is turned on.
Rotate 9,20. When the paper 12 is inserted from the insertion port 18, the paper 12 is cut by the respective teeth B at the occlusal portion 21, and becomes cutting waste 14, which is guided by the partition plates 15 and 16,
It falls into the waste storage part 23 (not shown).

At this time, the cutting waste 14 is
From the gaps between the partition plates 9 and 20 and the partition plates 15 and 16, each partition plate 1
Even if it intrudes between 5, 16 and each groove A, the groove A
Is deeper than the width of the cutting waste 14, the cutting waste 14 can move freely, so that the cutting waste 14 falls to the waste storage portion 23 (not shown) by gravity and is not wound around the groove A.

In this embodiment, the cross section of the groove is substantially trapezoidal. However, if the width of the depth of the groove is wider than the width of the opening of the groove, the depth of the groove is substantially circular. Any other shape may be used.

As described above, according to the present embodiment, it is possible to prevent the cutting waste from being wound around the groove and to prevent deformation and breakage of each partition plate.

[0021]

As described above, according to the present invention, the width of the deep part of the groove formed on the surface of each cutter roll is made wider than the width of the opening, so that the cutting waste is wound around the groove. Thus, it is possible to realize a highly durable document cutting machine which can prevent deformation and breakage of each partition plate.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a main part of a cutting unit of a document cutting machine according to an embodiment of the present invention. FIG. 1B is a cross-sectional view of a main part of an engaging portion of a cutter roll of the document cutting machine according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the document cutting machine at the time of cutting according to an embodiment of the present invention.

FIG. 3 is an external perspective view of a document cutting machine according to an embodiment of the present invention.

FIG. 4 is a plan view of a cutting section of a conventional document cutting machine.

FIG. 5 is a cross-sectional view of a main part of an engaging portion of a cutter roll of a conventional document cutting machine.

FIG. 6 is a longitudinal sectional view of a main part of a conventional document cutting machine at the time of cutting.

FIG. 7 is a longitudinal sectional view of an essential part showing a state in which cutting waste is wound around a cutter roll groove during cutting of a conventional document cutting machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conventional first cutter roll 2 Conventional second cutter roll 3 Motor 4 Motor pulley 5 Drive belt 6 Drive pulley 7 Drive gear 8 Interlocking gear 9 Cutter roll mounting plate 10 Cutter roll mounting plate 11 Base 12 Paper 13 Occlusal part DESCRIPTION OF SYMBOLS 14 Cutting waste 15 1st partition plate 16 2nd partition plate 17 Main body case 18 Input port 19 First cutter roll 20 Second cutter roll 21 Occlusion part 22 Operation switch 23 Waste storage part 24 Front door a Conventional groove part b Conventional teeth c Cutter roll shaft A Groove B Teeth

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Sho-51-156684 (JP, U) Japanese Utility Model Sho-59-131242 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B02C 18/00-18/44

Claims (1)

(57) [Claims] 1. A pair of cutter rolls each having a groove and a tooth on a surface thereof, and a cutting portion for cutting paper by engaging a bite of one groove of the cutter roll with another tooth of the cutter roll. Wherein the width of the occlusal portion of the tooth portion in the cutting portion is equal and the occlusal
A document cutting machine characterized in that the width of the inner part of the tooth is narrower than the width of the part .