JPH0716912B2 - Sheet cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an image forming agent which is installed as a sheet cutting unit of a recording apparatus such as a facsimile or a copying machine and which is discharged from the recording unit for forming an image on a recording sheet. The present invention relates to a sheet cutting device that cuts a recording sheet.

<Prior Art> Generally, a cutting portion of a recording sheet on which an image has been formed, which is installed in a facsimile, a copying machine or the like, is provided continuously to the recording portion in the apparatus main body. FIG. 3 shows an example of a facsimile machine provided with such a sheet cutting device for recording sheets.

In the figure, reference numeral 1 is a main body of a facsimile apparatus, which transmits information of an original 3 sent on an original table 2 via mirrors 4a and 4b.
An information reading / transmitting system that reads by the reading unit 4 configured to be converted into an electric signal by a photoelectric conversion element such as CCD and transmits the information, and a recording sheet 7 that is fed from a recording paper roll 5 by a platen roller 6, An information receiving / recording system having a recording head 8 that forms an image based on the received information is provided.

In the figure, a document storage tray 9 for storing a document 3 sent from a document table 2 is provided on the left side of the facsimile apparatus main body 1, and on the right side of the facsimile apparatus main body 1.
A recording sheet storage tray 11 for projecting an image-formed recording sheet 7 on which an image is recorded by the recording head 8 and cut into a predetermined length by the cutting unit 10 is provided in a protruding manner.

Reference numeral 12 is a power supply unit including a power supply device and the like.

<Problems to be Solved by the Invention> In the recording sheet cutting apparatus in the recording apparatus as described above, two blades are installed in a direction perpendicular to the traveling direction of the recording sheet, and one of these blades is installed. One of them is a drive blade driven by a motor or human power, and the other one is a biasing blade that is biased in the direction of the drive blade by a spring or the like.

The shear angle required for cutting the recording sheet is a method of polishing the meshing surface of the drive blade with respect to the biasing blade to a predetermined angle, or a method of making the drive blade a uniform thickness and inclining the entire drive blade to a predetermined angle. It's being used.

Whichever method is used, it is necessary for the recording sheet on which the image is formed by the recording unit to smoothly pass between the two blades, and thus a sufficient gap is formed between the two blades. ing.

The above-mentioned gap includes a risk that an operator may get injured by pinching his finger or may be damaged by pinching a tool during maintenance and inspection of the recording apparatus.

In addition, when the leading edge of the recording sheet passes through the cutting device and is introduced into the discharge section, the recording sheet curls in the space between the cutting section and the apparatus body, causing the recording sheet to curl and cause a jam. There is a risk.

<Means for Solving Problems> Means of a sheet cutting apparatus according to the present invention for solving the above-mentioned problems include a rotatable drive blade for cutting a sheet and a biasing force applied to the drive blade. A biasing blade, a cover provided on a surface of the drive blade through which the sheet passes, and a guide cover provided on an upper surface of the cover, and a gap through which the sheet can pass is provided between the cover and the guide cover. It is composed.

<Operation> In the above-mentioned sheet cutting apparatus, the cover provided on the drive blade covers the gap formed by the urging blade and the drive blade for passing the recording sheet on which the image is formed in the recording portion. The upper surface of the cover serves as a guide surface for the recording sheet by providing a gap between the upper surface of the cover and the blade surface of the biasing blade when the recording sheet is not cut.

Furthermore, by providing a guide cover on the upper surface of the cover,
The recording sheet is regulated by the upper surface of the cover and the guide cover and introduced into the discharge portion. Even if curling occurs due to curling around the recording sheet, the height of the guide cover is restricted.

By providing the guide cover, the gap formed by the urging blade and the drive blade and reduced by the cover is completely covered.

By providing the guide cover, the space between the cutting section and the discharging section, which is formed in the conventional recording apparatus, can be ignored.

<Example> An example of the present invention will be described below with reference to the drawings. In the figure, the same parts as those of the conventional example will be described with the same reference numerals.

FIG. 1 is an explanatory diagram of a case where the present invention is applied to a facsimile machine, and FIG. 2 is an exploded explanatory diagram of a cutting device of the present invention.

The recording sheet 7 fed from the recording sheet roll 5 is
It is introduced into a recording unit configured by the platen roller 6 and the recording head 8. The recording sheet 7 on which an image is formed in the recording section is guided to the cutting section 10.

In FIGS. 1 and 2, the cutting portion 10 is composed of a biasing blade 21 and a driving blade 22.

The biasing blade 21 is biased by the biasing spring 23 in the direction of the drive blade 22. The drive blade 22 has a uniform thickness, has a predetermined inclination with respect to the blade surface of the biasing blade 21, and is rotatably provided on the apparatus main body 1 about a shaft 24 as a fulcrum. The drive blade 22 is driven by a drive device (not shown) in synchronization with the recording operation of the recording section.

Reference numeral 25 denotes a cover, which is provided on one surface of the drive blade 22 on the side where the recording sheet 7 passes. The cover 25 is provided with the driving blade 22 inclined with respect to the urging blade 21 at a predetermined angle, and is sufficient for passing the recording sheet 7 on which an image is formed by the recording unit between the two. Since there is a gap, the gap formed by both blade surfaces is covered so that, for example, human hands do not enter.
The cover 25 is provided such that its upper surface is parallel to the blade surface of the biasing blade 21 regardless of the inclination angle of the drive blade 22 with respect to the biasing blade 21, and the upper surface of the cover 25 and the biasing blade 21 are A gap is provided between them so that the recording sheet 7 can pass therethrough.

Further, a guide cover 26 is attached to the cover 25 by means such as spot welding. Guide cover 26 is cover 25
Is provided over the entire length of the recording sheet 7 and is open in the front-back direction with respect to the passing direction of the recording sheet 7. Further, the recording portion side of the guide cover 26 is bent so that the recording sheet 7 can be easily introduced.

The height of the guide cover 26 is set so that the blade surface of the biasing blade 21 is hidden.

The cover 25 and the guide cover 26 have a quadrilateral shape in which the front and rear directions are opened with respect to the traveling direction of the recording sheet, the bottom surface is surrounded by the upper surface of the cover 25, and the other surface is surrounded by the guide cover 26. The recording sheet 7 passes through the inside of this quadrilateral and is discharged.

The recording sheet 7 that has passed through the cutting portion 10 contacts the recording substrate 27 and forms a pair of discharging rollers 28 and a pinch roller 29.
And is held by the pair of discharge rollers and discharged.

The discharge roller 28 is driven at the same peripheral speed as the platen roller 6 by a driving device (not shown).

The leading end of the recording sheet 7 discharged from the pair of discharge rollers 28, 29 contacts a rib 18 provided on the outer tray 14, and a storage space formed by the outer tray 14 and the inner tray 15 along the rib 18.
Proceed downward in 16.

A pressing plate for holding the leading edge of the recording sheet 7 in the storage space 16
30 is rotatably supported by a shaft 31 provided on the inner tray 15 side, the pressing plate 32 is biased toward the outer tray 14 side by a pressing spring 32, and the surface of the pressing plate 30 and the ribs 18 can be grasped. There is.

Further, a grip roller 33 is provided in the storage space 16, and the grip roller 33 receives the driving force of the discharge roller 28 by the grip belt 34 and rotates about the shaft 31.

The grip roller 33 acts to feed the recording sheet 7 entering the storage space 16 to the lower side of the storage space 16. The surface of the grip roller 33 is knurled so that the surface of the recording sheet 7 can be reliably captured. The grip roller 33 is configured to have a gap between it and the rib 18.

Reference numeral 35 denotes a bottom portion of the storage space 16, and when the leading end of the recording sheet 7 contacts the bottom portion 35, the recording sheet 7 stops entering.

When the recording sheet 7 comes into contact with the bottom portion 35 and stops entering into the storage space 16, if the image formation on the recording sheet 7 continues in the recording portion, the recording sheet 7 is still ejected by the discharge roller pair 28, Continues to be discharged from 29. In such a case, the recording sheet 7 is ejected in a loop shape to the outside of the apparatus main body 1 through the opening 20 formed at the upper end of the outer tray 14.

After the image formation is completed and the recording sheet 7 is cut by the cutting unit 10, the discharge roller pair continues to rotate and the recording sheet 7 is cut.
The rear end of the recording sheet 7 is discharged from the pair of discharge rollers 28, 29. The outer edge of the recording sheet 7 is held by the pressing plate 30 and the rib 18 due to the weight of the discharged portion in a loop shape.
The recording sheets 7 thereafter hang down to the outside of the outer tray 14 and are stacked in the storage space 16 in the same manner.

Reference numeral 36 is a slip-preventing material provided by a rubber piece or the like provided on the outer tray 14, and when the recording sheets 7 are stacked in the storage space 16, the first recording sheet 7 slides up to the outside of the recording sheet storage tray. It prevents it from falling off.

The outer tray 14 has a lock mechanism (not shown) for the main body 1 of the apparatus.
This locking mechanism locks the recording sheet 7 in the storage space 16, and when the recording sheet 7 exceeds a certain amount, that is, the recording sheet 7 enters between the grip roller 33 and the rib 18. It is configured to be released by the repulsive force generated when the gap disappears.

The upper case 38 is provided with the recording head 8, the recording substrate 27, and the pinch roller 29. By opening the upper case 38, the platen roller 6, cutter 10 and discharge roller
Since 28 is exposed, the recording sheet roll 5 is advantageously replaced.

<Effects of the Invention> In the cutting device of the present invention described in detail above, the gap formed between the urging blade and the drive blade is completely closed by the cover and the guide cover. Therefore, even during maintenance and inspection. It is possible to handle safely without the risk of an operator pinching a finger or a tool between these blades.

By passing the recording sheet inside the quadrilateral formed by the cover and the guide cover, the space between the cutting section and the discharging section can be ignored, and the curling effect of the curling of the recording sheet is also guided. By regulating the height of the cover and discharging the sheet, it is possible to prevent the occurrence of jam caused by curling of the recording sheet.

When the recording sheet is not cut, the recording sheet can be stably introduced into the discharge portion by using the upper surface of the cover as the advancing surface of the recording sheet, and the flexibility of jam generation in the discharge portion is reduced. And so on.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment in which the present invention is applied to a facsimile machine, FIG. 2 is an exploded explanatory view of a cutting device, and FIG. 3 is a schematic view of a general facsimile machine. 1 is the main body of the facsimile machine, 5 is a recording sheet roll, and 6
Is a platen roller, 7 is a recording sheet, 8 is a recording head,
10 is a cutting part, 14 is an outer tray, 15 is an inner tray, 16 is a storage space, 18 is a rib, 20 is an opening part, 21 is a biasing blade, 22 is a drive blade,
23 is a biasing spring, 24 is a shaft, 25 is a cover, 26 is a guide cover, 28 is a discharge roller, 29 is a pinch roller, 30 is a pressing plate,
32 is a pressing spring, 33 is a grip roller, 34 is a grip belt, and 35 is a bottom part.

Claims (1)

[Claims] 1. A rotatable drive blade for cutting a sheet, an urging blade urged by the drive blade, a cover provided on a surface of the drive blade through which the sheet passes, and the cover. A sheet cutting apparatus, wherein a guide cover is provided on an upper surface of the sheet, and a gap through which the sheet can pass is provided between the cover and the guide cover.