JPH06688U - Auto cutter device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an automatic cutter device that can smoothly discharge a cut sheet and can eliminate a paper jam phenomenon. [Structure] When the movable blade is moved in the forward direction to cut the paper, both end portions of the pressing plate located on the forward movement side are positioned on the forward movement side at both end portions of the paper discharge port. The relief portion is provided on at least one of the cutter cover and the pressing plate so as not to overlap the portion of the cutter cover to be used.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an automatic cutter device incorporated in, for example, a small printer that issues forms, and in particular, improves the configuration of a paper ejection unit for ejecting cut paper to smoothly eject paper. This relates to a device devised to eliminate the paper jam phenomenon.

[0002]

[Prior art]

 The auto cutter device has, for example, a configuration as shown in FIGS. First, there is a cutter cover 1 as shown in FIG. 3, and below the cutter cover 1, a cutter frame 3 as shown in FIG. 2 is installed. The cutter cover 1 shown in FIG. 3 is integrated with the cutter frame 3 shown in FIG. A side wall 4 is provided upright on three sides of the cutter frame 3. The cutter frame 3 is provided with a sheet inlet 5 into which a sheet of paper (not shown) that has been subjected to predetermined printing by a printer body (not shown) is introduced, and the sheet of cut paper is discharged to the cutter cover 1. A paper discharge port 7 is formed. The paper discharge port 7 has a simple rectangular shape as is clear from FIG.

A fixed blade 9 is fixed on the side of the cutter frame 3 and above the paper inlet 5 in FIG. On the other hand, a movable blade 11 is arranged below the sheet introduction port 5 in FIG. 2, and the movable blade 11 is attached by a drive means 13 so as to be capable of reciprocating in the vertical direction in FIG. The structure of the driving means 13 will be described below. First, the drive motor 15 is installed, and the worm gear 17 is fixed to the rotary shaft of the drive motor 15. A worm wheel 19 is arranged, and the worm wheel 19 meshes with the worm gear 17. The drive motor 15, the worm gear 17, and the worm wheel 19 are attached to the cutter cover 1 side, and are shown by phantom lines in FIGS. 2 and 6. In addition, the cutter cover 1 is notched in the mounting portion of the drive motor 15 to form an opening 20.

On the other hand, a swing lever 21 is mounted on the cutter frame 3 so as to swing around a fulcrum 23. A cam groove 25 is formed on the right side portion of the swing lever 21 in FIG. 2, and the cam groove 25 is provided in the cam groove 25 so as to project from the lower end surface of the worm wheel 19, as shown in FIGS. The cam pin 27 is movably engaged. Further, another groove 29 is formed at the center of the swing lever 21. A pressing plate 31, a slider 35, and a stopper plate 37 are arranged below the swing lever 21, and the pressing plate 31, the slider 35, and the stopper plate 37 are integrated by screw members 33 and 34.

The mounting structure of the pressing plate 31, the slider 35, the stopper plate 37, and the movable blade 11 and the like described above will be described in more detail. First, in the central portion of the cutter frame 3, as shown in FIGS. 2, 5 and 6, there is formed a rectangular slide groove 36 extending in the reciprocating direction of the movable blade 11. The slider 35 is slidably fitted in the slide groove 36. Further, as shown in FIG. 6, the movable blade 11 is mounted on the slider 35 via the sliding sheet 38, and the pressing plate 31 is further mounted thereon. On the other hand, the stopper plate 37 is installed below the slider 35 via another sliding sheet 40. In that state, they are screwed and coupled by the screw members 33 and 34 already described. As a result, the pressing plate 31, the movable blade 11, the sliding sheet 38, the slider 35, the sliding sheet 40, and the stop plate 37 are laminated and fixed in this order from the top. The pressing plate 31 and the movable blade 11 are piled up in a state as shown in FIG. 4, and both ends of the movable blade 11 and the tips thereof are installed in a state of being superposed on the fixed blade 9. . Further, the stopper plate 37, the sliding sheet 40, and the slider 35 are stacked in the state shown in the back view of FIG. The upper part of the screw member 33 is projected upward and is movably engaged with the groove 29 of the swing lever 21. Further, as shown in FIG. 5, a concave portion 42 is formed at the tip of the slider 35, and the pressing plate 31 at that portion is crimped (the crimped portion is denoted by reference numeral 44).

According to the above configuration, when the drive motor 15 rotates, the worm wheel 19 rotates counterclockwise in FIG. 2 (direction indicated by arrow a in FIG. 2) via the worm gear 17. As the worm wheel 19 rotates, the swing lever 21 swings in the forward direction (counterclockwise in FIG. 2, indicated by arrow b in the figure). As a result, the pressing plate 31, the movable blade 11, the sliding sheet 38, the slider 35, the sliding sheet 40, and the stopper plate 37 are integrally arranged in the forward direction along the slide groove 36 via the upper portion of the screw member 33. Move straight to. That is, the rotational movement of the drive motor 19 is converted into the linear movement along the slide groove 36. Thereby, the movable blade 11 and the fixed blade 9 perform a shearing operation to cut the sheet. Further, when the worm wheel 19 makes a half turn from the state shown in FIG. 2 and makes a further half turn, the swing lever 21 swings in the backward direction (clockwise direction in FIG. 2), and as a result, it is pressed down. The plate 31, the movable blade 11, the sliding sheet 38, the slider 35, the sliding sheet 40, and the stop plate 37 also linearly move in the backward direction along the slide groove 36 and return to the original position. This completes one cutting operation.

[0007]

[Problems to be solved by the device]

 The above-mentioned conventional configuration has the following problems. In the cutting operation, when the movable blade 11 is moved most in the forward direction, both ends of the pressing plate 31 on the forward side are located on both ends of the sheet discharge port 7 and the forward side. It will overlap with the part of the cutter cover 1. This is shown in FIG. The shaded portion in FIG. 7 is the overlapped portion. That is, since the paper discharge port 7 of the cutter cover 1 has a simple rectangular shape, at both ends thereof, both ends of the pressing plate 31 and the tip end portions thereof overlap the cutter cover 1. Is. In this way, when the pressing plate 31 and both ends of the sheet discharge port 7 formed in the cutter cover 1 partially overlap, the cut sheet is sandwiched between the cutter cover 1 and the pressing plate 31. , Folds are formed on the paper. When a crease is formed on the paper, the paper may be caught due to the crease, which impairs the discharge of the paper and causes a paper jam (jam) phenomenon.

The present invention has been made on the basis of such a point, and an object of the present invention is to make it possible to smoothly discharge a cut sheet and to prevent the occurrence of a paper jam phenomenon. It is to provide an automatic cutter device that can perform.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the automatic cutter device according to the present invention is capable of reciprocating in a state in which a cutter cover having a paper discharge port for discharging cut paper and a press plate inside the cutter cover are held. In order to cut the paper in the automatic cutter device including the movable blade arranged in the above position and the fixed blade that is fixed inside the cutter cover at a predetermined position in the forward direction of the movable blade. When the movable blade is moved in the forward direction, the edges of the presser plate that are located on the forward side overlap the edges of the paper exit that are on the forward side. It is characterized in that a relief portion is provided on at least one of the cutter cover and the pressing plate so as not to fit. Further, when the movable blade and the pressing plate are integrally installed as a movable blade, the cutter cover is provided with a relief portion.

[0010]

[Action]

 In the case of the present invention, when the movable blade is moved in the forward direction to cut the paper, the both end portions of the pressing plate located on the forward movement side are the both end portions of the paper discharge port. At least one of the cutter cover and the pressing plate is provided with a relief portion so as not to overlap with the portion of the cutter cover located on the moving side. Therefore, when the movable blade is moved in the forward direction to cut the paper, the parts on both sides of the press plate that are on the forward side are on both sides of the paper discharge port and on the forward side. There is no overlap on the cutter cover where it is located, and there is no crease formed on the paper, which would impair the discharge of the paper or cause a paper jam phenomenon. In addition, as a method of providing a relief portion, a method of forming a relief portion on the side of the cutter cover, a method of forming a relief portion on the side of the holding plate, a method of forming a relief portion on both the cutter cover and the holding plate, Such a configuration is possible. Some auto cutter devices do not have a pressing plate. That is, the movable blade itself has the function of the pressing plate. In this case, a relief section will be provided on the cutter cover side.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. The same parts as those of the conventional one are designated by the same reference numerals and the description thereof will be omitted. In the case of the automatic cutter apparatus according to the present embodiment, the escape portions 101 and 101 'are formed by cutting out a part of the cutter cover 1 located on the forward side at both ends of the sheet discharge port 7. . By providing these relief portions 101 and 101 ', when the movable blade 11 moves in the most forward direction, both end portions of the pressing plate 31 and the portions located on the forward movement side are both end portions of the paper discharge port. That is, it is to prevent the portion of the cutter cover 3 located on the forward side from overlapping. That is, the hatched portions in FIG. 7 used in the description of the conventional example are notched to form escape portions 101 and 101 '.

According to the above configuration, when the movable blade 11 is moved in the most forward direction during the cutting operation, the pressing plate 31 and the cutter cover 1 are disposed at the forward side positions at both ends of the sheet discharge port 7. Since there is no overlapped portion, it is possible to prevent the cut sheets from being sandwiched between the pressing plate 31 and the cutter cover 1. Therefore, it is possible to prevent creases from being formed in the cut paper, and prevent the paper discharge operation from being impaired or the paper jam phenomenon to occur due to the creases. Further, since the cutout portion of the cutter cover 1 is minimized, it does not impair the original function of the cutter cover 1.

The present invention is not limited to the above-mentioned one embodiment. First, in the above-described embodiment, the size of the escape portions 101 and 101 'is set to the shape and size corresponding to the shaded portion in FIG. 7, but the size is not limited thereto. It is sufficient that the relief portion is capable of preventing the polymerization of at least the hatched portion in FIG. 7, and thus the relief portion may be formed with a larger size. Further, in the above-described embodiment, the escape portions 101 and 101 'are formed on the paper discharge port 7 side of the cutter cover 1, but the escape portions may be formed on the pressing plate 31 side. Specifically, both end portions on the side of the pressing plate 31 are notched to form escape portions. In addition, a relief portion may be formed on both the cutter cover 1 and the pressing plate 31. Further, some auto cutter devices do not have the pressing plate 31. That is, it is as if the movable blade 11 and the pressing plate 31 were integrated. In such a case, a relief portion is formed on the cutter cover 1 side.

[0014]

[Effect of device]

 As described above in detail, according to the automatic cutter device of the present invention, when the movable blade is moved in the forward direction to cut the paper, the both end portions of the pressing plate, which are located on the forward movement side, are the paper sheets. At least one of the cutter cover and the pressing plate has a relief part so that it does not overlap the part of the cutter cover located on the forward side at both ends of the discharge port. When it is moved to, the end portions of the pressing plate located on the forward side do not overlap with the portions of the cutter cover located on the forward side at both ends of the paper discharge port. The paper is now sandwiched between the cutter cover and the holding plate to form a fold line, which prevents the paper discharge from being impaired and causes the paper jam phenomenon. Further, even in the case where the movable blade and the pressing plate are integrated, the same effect can be obtained by providing the relief portion in the cutter cover.

[Brief description of drawings]

FIG. 1 is a plan view showing a positional relationship between a cutter cover and a pressing plate when a movable blade moves most in a forward direction in a view showing an embodiment of the present invention.

FIG. 2 is a plan view of the automatic cutter device with the cutter cover removed, as used in the description of the conventional example.

FIG. 3 is a plan view of a cutter cover, which is a view used for explaining a conventional example.

FIG. 4 is a plan view showing a positional relationship and a shape of a pressing plate, a movable blade, and a fixed blade, which are diagrams used for explaining a conventional example.

FIG. 5 is a back view of the automatic cutter device used in the description of the conventional example.

FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 2, which is a view used for explaining a conventional example.

FIG. 7 is a plan view showing the positional relationship between the cutter cover and the pressing plate when the movable blade moves most in the forward direction, which is a view used for explaining the conventional example.

[Explanation of symbols]

 1 Cutter Cover 7 Paper Ejection Port 9 Fixed Blade 11 Movable Blade 31 Holding Plate 101 Escape Part 101 'Escape Part

Claims (2)

[Scope of utility model registration request] 1. A cutter cover having a paper discharge port for discharging cut paper, a movable blade disposed inside the cutter cover so as to be reciprocally movable while being pressed and held by a pressing plate, and the cutter. When the movable blade is moved in the forward direction to cut the sheet in an automatic cutter device including a fixed blade inside the cover and fixed at a predetermined position in the forward direction of the movable blade. , At least one of the cutter cover and the pressure plate, so that both ends of the pressure plate located on the forward side do not overlap with the parts of the cutter cover located on both sides of the paper discharge port on the forward side. An automatic cutter device characterized in that a relief portion is provided in the. 2. The automatic cutter device according to claim 1, wherein when the movable blade and the pressing plate are installed as a movable blade in an integrated state, a relief portion is provided in the cutter cover. Auto cutter device to do.