JPS62166990A - Cutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to a paper feed unit of an image recording device, etc., which unwinds a roll sheet stored in a magazine, cuts it into a desired size, and uses it as recording paper. This invention relates to a suitable cutter.

[Background of the invention]

A cutter, which is generally installed in the paper feed section of a single-image recording device, has a movable blade and a fixed blade facing each other vertically across the path of the roll sheet fed out from the magazine, so that the sheet can be cut by the vertical movement of the movable blade. There is one in which a rotary blade runs along a guide member inserted between frames facing each other across the sheet path in the width direction, and the sheet can be cut by the running force and rotational force of the rotating blade. It was getting worse.

However, in the case of a Kagu that moves the movable blade up and down, not only does the movable blade have to have a large movable range in the vertical direction, but the drive mechanism for the movable blade is also large and complicated.
Furthermore, when cutting the sheet, some kind of auxiliary mechanism for pressing the sheet against the fixed blade side is required, making it difficult to form a compact unit. On the other hand, in the case of a cutter that runs a rotating blade, it may be sufficient to ensure that the running range of the rotating blade is in the width direction of the sheet path.

All that is required is to form an extremely narrow slit through which the sheet can pass between the guide member through which the rotary blade travels and the fixed blade against which the single-rotation blade rubs, which has the advantage of making it possible to form an extremely compact unit.However, the rotational force of this rotary blade is Because this was done by a drive motor mounted on a shaft-supported running body,
The weight of the running body increases, making it difficult to run rapidly.
Power consumption while driving has increased.

It is difficult to adjust the optimum speed of the rotary blade relative to the traveling speed of the traveling object; if the rotary blade rotates too slowly relative to the traveling speed of the traveling object, the blade will lose its sharpness, and if it is too fast, the life of the blade will be shortened. There was a problem.

[Purpose of the invention]

This invention is intended to solve the above-mentioned problems, and provides a cutter that reduces the weight of the traveling body that drives the blade for one rotation, reduces power consumption during traveling, and significantly improves the sharpness and life of the blade. It is intended to.

[Structure of the invention]

In order to achieve the above object, the present invention provides a cutter equipped with a rotary blade pivotally supported by a running body that runs along a guide member, in which a friction ring is provided on the rotating shaft of the rotary blade to slide on the guide member, and It is constructed so that the rotational force of the rotary blade can be obtained by using the power generated when the body moves.

〔Example〕

Next, the present invention will be described based on embodiments shown in the accompanying drawings.

In FIG. 1, 1 is the main body of the image recording apparatus.

Inside the main body 1, there is an image exposure unit 5 which exposes a photosensitive material (an image exposure section 5 that exposes the original information to an optical system 4 from an original 3 placed on an original platen glass 2 provided on the upper surface of the main body 1) and a photosensitive material (an image exposure section 5 that exposes the image to a photosensitive material). It includes a development processing section 6 for developing material a, and 1
A cutter unit 9 and the counter unit 9 cut the photosensitive material a fed into the main body l from a magazine 7 attached to the side surface of the main body by a pair of upper and lower feed rollers 8, 8' into a desired size.
A conveyance system 10 is provided for conveying the photosensitive material a canted by the unit 9 to the exposure section 5 and the development processing section 6.

As shown in FIGS. 2 to 5, the cutter unit 9 is moored to an endless member 13 such as a timing belt stretched between a driving wheel 1) and a driven wheel 12, and is reciprocated along a guide member 15. A rotary blade 17 is rotatably attached to a running body 16, and the guide member 15 of the running body 16
As shown in the third figure, a concave fixed blade 20 with which the rotary blade 17 rubs is provided on a plate-like body 19 that is disposed opposite to each other with a seat passage 18 in between.

The guide member 15 is made of synthetic resin or the like and has a U-shaped cross section, and has slides into which the upper and lower parts 8!16a, 16b of the traveling body 16 fit into the opposing surface on the open side. R21,21
', and mounting boards 22, 22' are fixed to the lower surfaces of both ends in the length direction. As shown in FIGS. 4 and 5, this mounting board 22, 22' is connected to an opposing frame 23, 23, which is the skeleton of the conveyance system within the main body 1.
This is for horizontally mounting the guide member 15 between the mounting holes 24 and 24' provided in the mounting board 22 and 22'. 15 is inserted in the direction of the arrow in Fig. 5, the downward facing plate 2 abuts against the two-car frame 23, 23'.
5.25' is provided in a bent manner, and the corresponding plate 25.25' has two bottle holes 26.26' provided in the horizontal direction at the portions where they abut.
．． 27' is provided protrudingly. In this case, the bottle 27 on the front side in the insertion direction of the guide member 15 is formed shorter than the bottle 27' on the back side, and after inserting the bottle 27' on the back side into the bottle hole 26', the bottle 27 on the near side is inserted. The bottle hole 26
It can be inserted into the holder to simplify the installation process.

The drive wheel 1) is fixed to an output shaft 29 of a cutter drive motor 28 which is fixed to the lower surface of one mounting board 22 and is capable of forward and backward rotation, and the driven wheel 12 is rotatably attached to a support shaft on the mounting board 22'. 29'. The endless member 13 stretched between the driving wheel 1) and the driven wheel 12 is made endless by binding both ends of an end member to the traveling body 16 16'.

The rotary blade 17 has a rotary shaft 3 supported by a bearing member 31 having a flange 30 on the outer periphery, as shown in FIGS. 3, 6, and 7.
It is replaceably attached to the outer end of 2 with a screw 33. This bearing member 31 is fitted into a stepped hole 34 provided at the center of the front side of the traveling body 16, and the upper and lower portions of the collar 30 are connected to the outer walls 34 of the slides a21, 21' provided on the guide member 15.
It is supported by 5.35' and is designed not to overtake within the normal driving range. 36 is the rotary blade 17
The attachment/detachment port 36 is formed by cutting out the outer wall 35.35' of the slide groove 21.21' in the outer region of the traveling area. That is, the traveling body 1 is placed at this position.
Figure 6 shows when 6 is moved.

As shown in FIG. 7, the support of the collar 30 of the bearing member 31 is released, and the rotary blade 17 can be extracted together with the bearing member 31 from the traveling body 16. In other words, 1 rotation blade 1
7 can be replaced while being removed from the guide member 15.

37 is a friction ring fixed to the inner end of the rotating shaft 32 to which the rotary blade 17 is fixed, and the friction ring 37 has friction annular members 38 such as O-rings fitted in double rows around the outer periphery of the main portion 37'. , the annular member 38 is pressed against the inner surface of the upper frame of the guide member work 5. This allows the rotational force of the rotary blade 17 to utilize the power generated when the traveling body 16 is traveling, so that the rotational speed of the rotary blade 17 can be optimally adjusted relative to the traveling speed of the traveling body 13, and the sharpness and sharpness of the blade can be improved. It has the advantage of improving lifespan.

39 and 39' are the seat passages 18 when fixing the plate-shaped body 19 provided with the fixed blade 20 to the upper surface of the guide member 15.
A spacer +, 40.40' for securing the seat passage 1 formed between the guide member 15 and the plate-shaped body 19
8 is a taper provided on the sheet entry side so that the leading end of the sheet a can easily enter, and 50 is a guide portion that guides the sheet passing through the sheet passage 18 to the conveying section 10.

41a is a sensor that detects the home position of the rotary blade 17, and 41b is a sensor that detects the end position. These sensors 41a and 41b are non-contact and quick-response sensors such as photointerrupters. A control unit 42 controls forward rotation, reverse rotation, and stop of the cutter drive motor 28 via a driver 43 based on signals from the sensors 41a and 41b;
A sensor 4 is provided in the path of the conveyance system 10 and detects the length of the sheet a fed out from the magazine.

In the above embodiment, from the magazine 7 to the paper feed roller 8
．． When the sheet 1-a is fed out by the operation of 8', the leading edge of the sheet a is conveyed through the sheet passage 18 formed between the guide member 15 of the traveling body 16 and the plate-shaped body 19 provided with the fixed blade 20. sent into the system. When the sheet feeding length detection sensor 44 detects the leading edge of the sheet midway through the path of the conveyance system, a detection signal thereof is output to the control section 42 . As a result, the control section 42 stops the paper feed motor 45 via the driver 43, rotates the cutter drive motor 28 in the forward direction, drives the endless member 13, and causes the rotary blade 17 to travel together with the traveling body 16.

This rotary blade 17 receives the rotational force from the friction ring 37 that rotates in sliding contact with the guide member 15, and cuts the sheet a in the sheet passage 18 while rotating and traveling.
The sensor 41b installed at the end position detects,
When the detection signal is output to the control section 42, the control section 42
After temporarily stopping the cutter drive motor 28 via the driver 43, the force/cutter drive motor 28 is immediately reversed to return the traveling body 16 and the rotary blade 17 to the home position.At this home position, the sensor 41a is activated.
detects the rotary blade 17 and transmits the detection signal to the control section 42.
When the cutter drive motor 28 is outputted, the control section 42 stops the cutter drive motor 28 via the driver 43. After that, the cut sheets are subjected to a predetermined process.

After the processing is completed or the paper moves to a certain processing section, the paper feed roller 8.8' is operated again.

When the sheet feeding length detection sensor 44 detects the sheet end, the same operation as described above is repeated.

〔Effect of the invention〕

As described above, the present invention provides a cutter equipped with a rotary blade that is pivotally supported by a traveling body that runs along a guide member, in which a friction ring that slides into contact with the guide member is provided on the rotation shaft of the rotary blade. Because of this feature, the rotational force of the rotary blade is obtained using the power when the traveling body is traveling, and there is no need for a drive motor to rotate the rotary blade on the traveling body, and the weight of the traveling body can be reduced. This makes it possible to achieve smooth driving and reduce power consumption during driving. In addition, since the rotational speed of the rotary blade is optimal for the traveling speed of the traveling object, it has various excellent effects such as improving the sharpness and life of the blade, and it also allows for accurate recording of recording sheets such as photographic paper. Extremely effective for cutting.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a sectional view of the entire image recording device, Fig. 2 is a partially omitted perspective view of the cutter, and Fig. 3 is a partially omitted perspective view of the cutter.
The figure is a cross-sectional view of the attachment part of the rotary blade, Figure 4 is a partially omitted plan view showing how the guide member of the traveling body is attached, Figure 5 is a front view of rotation, and Figure 6 is a diagram showing how the rotary blade is removed. FIG. 7 is a partially cutaway perspective view, FIG. 7 is a sectional view thereof, and FIG. 8 is a block diagram of the control system. 9.--Cutter unit 1).-Drive wheel 12.-
- Driven wheel 13 - Endless member 15 -
Guide member 16 - Traveling body 17 - Rotating blade
19--Plate body 20--Fixed blade
32-Rotating shaft 37-Friction ring 37
' - Main part 38 - Annular friction member patent Applicant Konishiroku Photo Industry Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 7

Claims (2)

[Claims] (1) A cutter equipped with a rotary blade pivotally supported by a traveling body that runs along a guide member, characterized in that a friction ring that slides on the guide member is provided on the rotation axis of the rotary blade. (2) The cutter according to claim 1, wherein the friction ring has a friction annular member such as an O-ring fitted around the outer periphery of its main portion.