JPH0453695A - Sheet cutting device and recording device using the sheet cutting device - Google Patents

Abstract

PURPOSE:To prevent a finger, etc., from being inserted into the gap between a rocking edge and sheet discharging means, by projecting a support member which supports a fixed edge to the downstream side in the sheet transfer direction and covering this gap. CONSTITUTION:A lever 7d4 of a fixed edge stay 7d covers the gap beta between a rocking edge 7b and discharging roller shaft 8b2 at the friction completion side. Accordingly, the insertion of a finger, etc., between the lever 7d4 and discharging roller 8a becomes impossible. As a result, the danger of inserting a finger, etc., in the gap beta is eliminated even in the case of the gap between the rocking edge 7b and discharging roller shaft 8b2 at the friction completion side being set wider.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a sheet cutting device and a recording device used in facsimile machines, copying machines, etc. The present invention relates to a cutting device and a recording device using the sheet cutting device.

<Prior Art> Today, recording devices such as facsimile machines are widely used, and these devices are designed to accommodate recording lengths of all lengths by winding a long recording sheet onto a core. Generally, a so-called sheet roll is used, and after recording a received image, the image is cut with a cutter from the trailing edge.

Here, the conventional cutter has a fixing force of 50 as shown in Figure 5.
The swinging blade 51 is configured to be swingable relative to the double-edged blade 50.5.
In many cases, the sheet 52 is cut by rubbing 1 against each other. In these swing-type cutters, as shown in the schematic plan view of FIG. 50, so that when the swinging blade 51 swings, the fixed blade 50 and the swinging blade 51 reliably rub against each other from the rubbing start side p toward the rubbing end side q. are doing.

Note that when the swinging blade 51 is attached diagonally to the fixed blade 50 as described above, the distance between the swinging blade 51 and the discharge roller 53, which is mounted perpendicular to the sheet conveyance direction, is not constant. Therefore, conventionally, as shown in FIG.
A separate member 5 is attached to the swinging blade 51 to fill the widened part.
4 (the shaded area in FIG. 6) is attached to prevent fingers or the like from getting between the swinging blade 51 and the discharge roller 53.

<Problems to be Solved by the Invention> However, in the configuration in which the separate member 54 is attached to the swinging blade 51 as described above, the number of assembly steps increases and the number of parts increases, resulting in an increase in cost. was.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide a sheet cutting device that can reduce the number of parts and reduce costs, and a recording device using the sheet cutting device. It is something.

<Means for Solving the Problems> A typical means according to the present invention for solving the above-mentioned problems includes a fixed blade, a support member for supporting the fixed blade, and a support member for supporting the fixed blade, which is attached diagonally to the fixed blade. a swinging blade that is attached to the fixed blade and swings relative to the fixed blade, at least a portion of the support member protruding downstream in the sheet conveyance direction, and a swinging blade that is attached to the swinging blade and swinging with respect to the fixed blade; It is characterized in that it is configured to cover the gap with the sheet discharging means provided on the downstream side in the direction.

<Function> In the above means, in order to protrude the supporting member of the fixed blade and cover the gap between the swinging blade and the sheet discharging means, the swinging blade 51
This eliminates the need to insert a finger into the gap without providing a separate member, and at the same time, it is possible to easily clear a jam that occurs in the sheet cutting device.

<Embodiment> Next, an embodiment of the present invention in which the above means is applied to a facsimile machine will be described.

FIGS. 1A and 1B are diagrams illustrating the configuration of a sheet cutting device, and FIG. 2 is a diagram illustrating the internal configuration of a recording apparatus using the sheet cutting device.

(Overall Configuration) First, the overall configuration of the facsimile apparatus according to this embodiment will be described.

As shown in FIG. 2, this is configured such that a plurality of originals 2 placed on an original placing table 1 are separated and transported one by one by an original conveying means 3, and are read by a reading means 4.

The information read by the reading means 4 is transmitted to its own recording means 5 in the copy mode, and is transmitted to the recording means of other machines in the transmission mode. Then, recording is performed on the recording sheet 6 according to the read information, and the recorded sheet 6 is cut by a cutter 7, which is a sheet cutting device, and is discharged to a discharge stacker 8c by a pair of discharge rollers 8a and 8b, which is a discharge means 8. It is structured as follows.

Next, the configuration of each part will be specifically explained.

(Original conveyance means) As shown in FIG. 2, this means that a plurality of originals 2 placed on the document table 1 are moved to a preliminary conveyance roller 3a, a pressure contact piece 3b that presses against this, and a separation roller 3C and this. The sheets are separated and fed one by one by the pressure contact piece 3d that comes into pressure contact with the transport roller pairs 3e+, 3e, and the discharge roller pair 3f.
+, 3 fi in the direction of arrow a and discharged onto the discharge tray 3g.

(Reading means) The reading means 4 reads written information on the document conveyed by the document conveyance means 3 and converts it into an electric signal, and as shown in FIG. 3f, afZ)
4a is provided, and light from a light source 4b is irradiated onto the document surface through the slit 4a, and the reflected light is reflected by a plurality of mirrors 4C, passes through a lens 4d, and reaches a photoelectric conversion element 4e such as a CCD. , is configured to convert read information into an electrical signal.

(Recording Means) The recording means 5 in this embodiment uses a heat-sensitive recording method, and as shown in FIG. A sheet roll 6b wound around the sheet roll 6b is housed in a roll holder 9, and the recording sheet 6 is set so as to reach the recording means 5.

The recording means 5 is configured such that a platen roller 5a, which also serves as a sheet conveying means for the recording sheet 6, is driven and rotated by a platen motor (not shown).
The recording head 5b is pressed into contact with the recording head 5b by the pressure of the pressing spring 5c. The recording head 5b is formed by arranging minute electrothermal transducers that generate heat when energized in a line in the width direction of the recording sheet 6, and conveys the recording sheet 6 by rotating the platen roller 5a in the direction of the arrow in FIG. At the same time, it is configured to perform recording on the recording sheet 6 by energizing the electrothermal transducer according to the read information.

(Sheet cutting device W) A counter 7, which is a sheet cutting device, cuts the sheet 6 recorded by the recording means 5 from the trailing edge of the image.

As shown in FIGS. 1 and 2, the structure consists of a fixed blade 7a made of a thin blade, and a swinging blade 7b that is swung by a motor (not shown) and can rub against the fixed blade 7a. It is configured as a dynamic cutter.

To explain this specifically, in FIGS. 1(a) and 1(b), 7c is a cutter chassis having upright side plates 7c+, 7cz at both ends, which is fixed to the main body of the recording apparatus, and fixed blade 7a is fixed to this. A fixed blade stay 7d and a swing blade 7b, which serve as supporting members, are rotatably pivoted.

The fixed blade 7a in this embodiment is composed of a thin blade with a thickness of about 0.8+m11, which is attached to a fixed blade stay 7d bent in a crank shape, and both ends of the fixed blade stay 7d are connected by shafts 7d, 7dt. canter chassis 7c
It is rotatably pivoted to the side plates 7c+ and 7c2. Further, a torsion coil spring 7e is attached to the shaft 7dt, and one end of the spring 7e is engaged with the side plate 7cl, and the other end is engaged with the back surface of the fixed blade stay 7d to move the fixed blade 7a to the swinging blade 7b. is constantly energized. Furthermore, a guide protrusion 7a is protrudingly provided at one end of the fixed blade 7a for regulating the biasing of the fixed blade 7a and guiding the rubbing with the swinging blade 7b.

The swinging blade 7b is constituted by a thick blade with a thickness of about 5 mm, and both ends of the swinging blade 7b are rotatably attached to the chassis side plate 7cI+7Cz by shafts 7b+, 7bz. The shaft 7b is attached to one end of the swinging blade 7b.
The bottle 7b is protruded closer to the cutting edge 7bs than the
A link (not shown) is pivotally attached to this pin 1ba, and the link is connected to a motor connected to an eccentric cam. Therefore, the swinging blade 7b is rotated by the shaft 7b by the drive of the motor.
+, 7bz, and as a result, the cutting edge 7b of the swinging blade 7b and the cutting edge 7a of the fixed blade 7a sequentially move from the end p on the rubbing start side to the end q on the rubbing end side. Then, the recording sheet 6 is cut. Incidentally, after cutting the sheet, the swinging blade 7b returns to the standby position by the link mechanism.

In order to ensure that the swinging blade 7b rubs against the fixed blade 7a, the shafts 7d+ and 7d of the fixed blade stay 7d are
2 are attached at almost the same position in the X-Y coordinates as shown in FIG. The shaft is attached to the shaft 7b on the rubbing start side p.

The axis 7bz of the rubbing end side q moves in the X direction with reference to .

It is mounted biased toward the upstream side in the sheet conveyance direction and biased downward by yI in the Y direction. As a result, the cutting edge 7al of the fixed blade 7a intersects the circumference of the cutting edge locus circle 7r of the swinging blade 7b, and the cutting edge 78 of the fixed blade 7a! is attached so as to reliably interfere with the cutting edge locus circle.

Here, the relationship between the fixed blade 7a and the fixed blade stay 7d will be explained.

The fixed blade stay 7d is made of a metal sheet approximately 2 m thick and bent into a crank shape to increase its rigidity, and as shown in FIGS. 1 and 3, the lower part of the stay 7d is bent upstream in the sheet conveyance direction. A guide portion 7dz is formed, and the upper portion is bent downstream in the sheet conveyance direction to form a lever portion 7d4. The fixed blade 7a is attached to the upright part 7ds that connects the guide part 7d3 and the lever part Tdn, and at this time, as shown in FIG. 3, the lower end where the cutting edge 7at of the fixed blade 7a is formed is It is attached so as to be located on the extension line of the lower surface of the guide portion 7d3.

The fixed blade stay 7d has a constant thickness to maintain a certain degree of rigidity, and as shown in FIG. 3, the bent portion R between the guide portion 7a3 and the upright portion 7as is bent into a curved line with a predetermined curvature. are doing. Therefore, a gap α is created between the fixed blade 7a and the stay 7d at the bent portion R. Therefore, in this embodiment, in order to cover the gap α,
A sheet guide member 7g made of a thin polyester plate having a thickness of approximately 0.1+mm is attached to the lower surface of the guide portion 7d3.

One end of the guide member 7g on the upstream side in the sheet conveyance direction protrudes further upstream than the guide portion 7d3 of the stay 7d, and the other downstream end in the sheet conveyance direction contacts the lower end of the fixed blade 7a. It is attached so as not to contact 7a2. Therefore, the swinging blade 7b relative to the fixed blade 7a
It does not interfere with the friction between the blades and completely covers the gap α formed between the fixed blade 7a and the stay 7d as shown in FIG. The thickness of the guide member 7g is set to such a value that it does not come into contact with the swinging blade 7b and change the sheet entry angle during sheet cutting.

As a result, even if the recording sheet 6 that has passed through the recording means 5 is curled upward, the guide member 7
The fixed blade 7a and the swinging blade 7b are guided by the fixed blade 7a and the stay 7d without entering the gap α formed by the fixed blade 7a and the stay 7d.
It will be inserted in between. When cutting, the cutting edge 7a2 of the fixed blade 7a is located at the extension line of the lower end surface of the stay 7d, so that the recording sheet 6 can be cut reliably.

Next, the lever part 7da will be explained. This is to remove the jammed sheet 6 by pushing the lever part 7d4 downward with a finger or the like to rotate the fixed blade 7a if the recording sheet 6 jams in the cutter 7 portion. As shown in FIG. 1(a), the lever part 7d4 in this embodiment has a sheet conveyance downstream end that is connected to the discharge roller 8.
It is configured to protrude so as to reach the vicinity of a.

As described above, the swinging blade 7b is attached at positions where the rotating shafts 7b+ and 7b2 are shifted from each other in the X-Y coordinates in order to ensure the friction with the fixed blade 7a. For this reason, the swinging blade 7
The gap β between the downstream end in the sheet conveyance direction of b and the discharge roller 8b differs between the rubbing start side p and the rubbing end side q by the amount of the deviation. The width of the roller portion 8b of the discharge roller 8b is narrower than that of the roller portion 8b of the discharge roller 8b, and if β is the gap between the downstream end of the swinging blade 7b in the sheet conveyance direction and the roller shaft 8bz of the discharge roller 8b, then the fourth
As shown in Figure 4(a), the gap β is about 5 m on the rubbing start side p, while on the rubbing end side q, as shown in Figure 4(b), the gap β is approximately 5 m. β is about 9 cabinets. Therefore, the end of the lever part 7b on the rubbing end side q is extended toward the discharge roller 8a, and as shown in FIG. 4(c), the lever part 7b on the rubbing end side q, The configuration is such that the gap γ between the discharge roller 8a and the discharge roller 8a becomes narrow. Here, the gap T is 2 meters to 8 meters, preferably 2 meters to 5 meters,
Most preferably, it is set to 2II11 to 4■, and in this embodiment, it is set to about 411IIa.

Therefore, on the rubbing end side q, the lever part 7a comes to cover the gap β between the swinging blade 7b and the ejection roller shaft 8bz, and it is impossible to insert, for example, a finger or the like between the lever part 7d and the ejection roller 8a. As a result, even if the gap β between the swinging blade 7b and the discharge roller shaft 8bg on the rubbing end side q is set to be wide, there is a risk that a finger or the like may be inserted into the gap β. will disappear. Note that even on the rubbing start side p, the lever part 7d may be extended toward the discharge roller 8a side, but as shown in FIG. 4(a), the gap between the lever part 7di and the discharge roller 8a Even if T is wide, the gap β between the swinging blade 7b and the discharge roller shaft 8bz is narrow, so there is no risk of a finger or the like getting stuck in the gap β.

In this embodiment, the gap between the swinging blade 7b and the roller portion 8b+ of the discharge roller 8b is not large enough to allow a finger or the like to enter.
There is no problem even if the lever portion 7d4 does not protrude.

By partially extending the lever portion 7d4 of the fixed blade stay 7d toward the discharge roller as described above, it becomes easier to clear a jam near the cutter 7, for example.

[Other Examples]

In the embodiment described above, an example was shown in which the fixed blade 7a of the sheet cutting device was constructed with a thin blade, and the swinging blade 7b was constructed with a thick blade.
Both the fixed blade 7a and the swinging blade 7b may be made of thin blades by attaching the swinging blade ma to the swinging blade stay.

Furthermore, in the embodiment described above, the fixed blade 7a is different from the swinging blade 7b.
Although the swinging blade 7b is arranged above the fixed blade 7a, it goes without saying that the swinging blade 7b may be arranged above the fixed blade 7a.

Further, in the above-mentioned embodiment, the lever part 7d4 protrudes to the vicinity of the ejecting roller 8a only on the rubbing end side q where the gap β between the swinging blade 7b and the ejecting roller is wide. The lever 7d may be configured to protrude not only on the side q but also on the rubbing start side p to the vicinity of the discharge roller 8a.

Furthermore, in the above embodiment, the width of the roller portion 8b of the discharge roller 8b is narrower than the width of the swinging blade 7b.
It goes without saying that similar effects can be obtained even when the width of the roller portion 8b is the same or wider.

Furthermore, the materials, dimensions, etc. exemplified in the sheet cutting device described above are not limited to these, and can be changed as appropriate.

Further, in the above-mentioned embodiments, a thermal recording method was used as a recording means, but the recording means is not limited to this, and there are other methods for recording sheets such as a thermal transfer recording method, an inkjet recording method, an impact recording method, etc. It is possible to use various recording methods for recording.

Further, regarding the conveyance means for the recording sheet 6, in the above-described embodiment, the recording sheet 6 is conveyed by the platen roller 5a constituting the recording means 5, but a sheet conveyance roller separate from the recording means 5 is provided, and the recording sheet 6 is thereby conveyed. The sheet 6 may be conveyed, and furthermore, the recording sheet 6 may be conveyed by rotating an endless belt instead of a roller.

Furthermore, the sheet cutting device and the recording device can of course be used in, for example, a printer, a copying machine, etc., in addition to the above-mentioned facsimile machine.

<Effects of the Invention> As described above, the present invention provides a sheet cutting device including a fixed blade and a swinging blade, in which the support member supporting the fixed blade protrudes downstream in the sheet conveyance direction, and the swinging blade and the sheet Since the gap with the discharge means is covered, it becomes possible to easily handle jams and the like.

Further, since it is possible to prevent fingers from entering the gap without attaching a separate member to the swinging blade as in the conventional case, it is possible to reduce the number of parts and the assembly process, thereby reducing costs.

[Brief explanation of drawings]

1(a) and 1(b) are diagrams illustrating the configuration of a sheet cutting device according to an embodiment of the present invention, FIG. 2 is a diagram illustrating the internal configuration of a recording device using the sheet cutting device, and FIG. 4(a) and 4(b) are cross-sectional views of the rubbing start side and the rubbing end side of the fixed blade and the swinging blade, and FIGS. 5 and 6 are conventional diagrams. It is an explanatory diagram of the technique. Reference numeral 1 denotes a document placing table, 2 a document, 3 a document transport means, 3a a preliminary transport roller, 3b a pressure contact piece, 3c a separation roller, 3
d is a pressure contact piece, 3e+, 3ez are conveyance rollers, 3f+, 3
ft is a discharge roller, 3g is a discharge tray, 4 is a reading means,
4a is a slit, 4b is a light source, 4C is a mirror, 4d is a lens, 4e is a photoelectric conversion element, 5 is a recording means, 5a is a platen roller, 5b is a recording head, 5c is a pressing spring, 6 is a recording sheet, and 6a is a winding Core, 6b is sheet roll,
7 is a cutter, 7a is a fixed blade, 7a+ is a guide protrusion, 7
ao is the cutting edge, 7b is the swinging blade, 7bl, 'yb is the shaft, 7b3 is the cutting edge, 7ha is the pin, 7c is the cutter chassis, 7c. 7cm is the upright side wall, 7d is the fixed blade stay, 7d...
7d is the shaft, 7d is the guide part, 7d is part of the lever, 7
d. is a standing portion, 7e is a torsion coil spring, 7f is a cutting edge locus circle, 7g is a sheet guide member, 8 is a discharge means, 8 a +
8b is a discharge roller, 8b+ is a roller portion, 8bt is a roller shaft, 8c is a discharge stacker, and 9 is a roll holder.

Claims (2)

[Claims] (1) A fixed blade, a supporting member for supporting the fixed blade, and a swinging blade that is attached obliquely to the fixed blade and swings with respect to the fixed blade, and the supporting member What is claimed is: 1. A sheet cutting device characterized in that at least a portion of the sheet protrudes toward the downstream side in the sheet conveyance direction. (2) Claim (1) further comprising: a sheet conveying means for conveying a sheet; a recording means for recording on the sheet conveyed by the sheet conveying means; and a cutting means for cutting the sheet recorded by the recording means. ) and a sheet discharging means provided downstream of the sheet cutting device in the sheet conveying direction for discharging the sheet cut by the sheet cutting device, A recording apparatus characterized in that at least a part of the support member is configured to protrude so as to cover a gap between the swinging blade of the sheet cutting device and the sheet discharging means.