JP2009148870A - Safety device of cutting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problems: a safety device of a conventional cutting device holds locking of a cutter only when the cutter is opened to an uppermost position, and therefore the cutter is unsafe before reaching the uppermost position; further when the cutting machine is applied to an ordinary paper cutter for cutting only a small amount of paper, canceling operation of the safety device is required, which is inconvenient for the user. <P>SOLUTION: A new safety device of a cutting device is provided with a stepped pin penetrating through a frame and a cutter, and lock canceling operation is carried out prior to upward opening operation of the cutter. According to the structure of the safety device, the canceling operation of the stepped pin is achieved by rotating a screw, and therefore lock cancellation by erroneous operation by the user is avoided. Further by slightly expanding a hole formed in the cutter, the safety device does not require the canceling operation when only a small amount of paper is cut. In this manner the safety and convenience of the safety device are enhanced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a safety device for a cutting machine that can stack a plurality of sheet materials (hereinafter referred to as “paper”) such as films and cloths and cut them in a straight line.

The safety device of the conventional cutting machine has a structure in which the cutter cannot be operated without an unlocking operation so that the cutter is not lowered by mistake when the cutter is in the upper standby position.
JP 9-314496 A Registered Utility Model No. 301462

  The safety device of the conventional cutting machine has a structure in which the blade is locked at the most open position upward, and the safety device does not work at the position where it is opened halfway. It is extremely dangerous if you move the operating lever and put your fingers inside the cutter.

  Even in the state where the handle operation is suppressed, if the blade is held at the most open position upward, the sharp edge of the blade can be touched, which is not safe.

  Further, in the safety device of a conventional cutting machine, when it is intended to be used as a normal paper cutter that cuts only one sheet or a small number of sheets, it is necessary to release the safety device every time it is cut. Inconvenient.

  The present invention eliminates the above drawbacks, and prior to the upward movement of the cutter of the cutting machine, it is safe to avoid the exposure of the blade edge due to unintentional operation by the structure that first requires the unlocking of the safety device. In addition, it is possible to raise the blade within a range where it is impossible to touch the sharp blade edge of about 3 mm or less, especially without performing the release operation of the safety device, so that the convenience as a normal paper cutter is improved. It is the purpose.

  The safety device for a cutting machine according to the present invention includes a pair of frames having an opening through which a sheet is passed, a cutter having a straight blade edge that is sandwiched between the frames and can move up and down above the opening, In the cutting machine comprising a blade base having a flat portion fixed below the opening and being fixed to the frame, the pair of frames are each provided with a large-diameter and small-diameter hole coaxially, and the cutter Is provided with a groove having the same diameter as the large-diameter hole and a groove having a width not exceeding the diameter of the large-diameter hole extending below, and having two types of diameters corresponding to each hole diameter and groove width. The pin is characterized in that it can move in the axial direction through the flat frame and the blade.

  The large-diameter holes of the cutter having the above structure can be provided at both upper and lower ends of the stroke of the cutter. In this case, the cutter can be locked at the upper and lower ends of the stroke.

  If the structure is such that the large-diameter portion of the stepped pin is urged by means such as a spring so as to press it toward the blade, the blade is automatically locked at that position when it is at a specific position.

  If the outer periphery of either the large or small diameter of the stepped pin is a screw and the hole of the corresponding frame is a screw hole, the pin must be rotated to unlock the safety device. The lock is not released unintentionally during the work of movement.

  Place stepped pins on the left and right sides of the frame, one of which biases the large diameter part in the direction of pressing the blade, and the other is a screw hole on the outer circumference of either the large or small diameter. If it is a screw hole, the screw cutter can be released by rotating the screw prior to using the cutter, and then the cutter can be used only by pushing or pulling the pin. Can be avoided.

  The left and right stepped pins are arranged at the lowermost position of the tool stroke when the large diameter part enters the large diameter hole of the blade, and one pin urges the large diameter part to press the blade side, The pin has a small or large diameter outer periphery as a screw, and a corresponding frame hole as a screw hole, and the blade has a large diameter hole upward so that the blade can move upwards from the lower end of the stroke for a maximum of about 3 mm. If it is an elongated slot or a hole with a large diameter, the blade can be lifted up to a maximum of about 3 mm without requiring any release operation, so only one sheet or about 30 sheets or less can be cut. It can be used safely and conveniently as an ordinary paper cutter.

  As described above, the safety device of the cutting machine according to the present invention has a simple structure, but maintains a safe locked state at both the lower end and the upper and lower ends of the stroke of the cutter, and in particular the cutter that exposes the sharp edge. Prior to the upward movement of the paper, unlocking is essential and safety is ensured, and convenience as a normal paper cutter is high.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

  In the drawing, the blade 1 is suspended from the two shafts attached to the drive rod 3, the drive shaft 4, and the rotation support shaft 5 by the drive shaft 4 at a substantially central position inside the pair of frames 2. The rotary support shaft 5 is held by the frame 2 to rotate and support the drive rod 3, and by swinging the drive rod 3, the blade 1 moves up and down.

  1 and 2 show the standby state of the embodiment of the present invention, that is, when the blade 1 is at the lowermost end of the stroke, and the stepped pin 7 penetrates the blade 1 and the frame 2 and the stepped pin 7. The large-diameter portion of the blade 1 is in a hole having substantially the same diameter provided in the blade 1, so that the blade 1 cannot move upward while the blade edge of the blade 1 is in contact with the blade cradle 6. Therefore, the finger cannot touch the blade edge from the opening 2 a of the frame 2.

  3 and 4 show a state in which the cutter has moved upward in the embodiment of the present invention.

  When the stepped pin 7 is pushed in the direction of the arrow D, there is no interference with the stepped pin with respect to the blade 1, so that the blade 1 is raised by rotating the driving rod 3 in the direction of the arrow C, and the frame 2 A sheet (not shown) to be cut can be inserted into the opening 2a.

  FIG. 5 shows the shape of the hole made in the cutter 1, and (A) suppresses movement only at the standby position (lower end of the stroke) of the cutter 1, but also at the lower end as shown in (B). If a hole corresponding to the large diameter of the stepped pin 7 is provided, the cutter 1 suppresses the movement of the cutter 1 even at the upper end of the stroke.

  5 (b) is convenient because it is possible to perform operations such as positioning of the paper while the blade 1 is raised, but there is still a concern that the blade edge of the blade 1 may be touched through the opening 2 a of the frame 2. It will be.

  The stepped pins 7 and the corresponding holes in the frame 2 do not necessarily have to be round holes, but can be square, hexagonal or other cross-sectional shapes.

  FIG. 6 shows an embodiment of the present invention, which relates to a structure for maintaining the position of the stepped pin. As shown in FIG. 6A, the large diameter portion of the stepped pin 7 is always moved in the direction of the blade 1 (by the spring 8). It is energized in the direction of arrow E).

  In the case of such a structure, when the blade 1 is at the upper or lower end of the stroke or any one of them, the movement from the state is automatically suppressed, so that it is safer.

  The spring 8 can be replaced with a disc spring, an elastic body such as rubber, or a magnet instead of the coil spring as shown.

  FIG. 6B shows the outer periphery of the small-diameter portion of the stepped pin 7 and the corresponding hole in the frame 2 as a screw.

  In the case of such a structure, since it is not a simple push or pull operation, there is no fear that the lock is accidentally released during handling.

  The screw may be the outer periphery of the large diameter portion and the corresponding hole of the frame 2.

  In FIG. 7, in addition to the stepped pin 7, a stepped pin 9 is additionally provided at a substantially symmetrical position.

  If the stepped pin 7 is configured to be biased as shown in FIG. 6 (a) and the stepped pin 9 is a screw as shown in FIG. 6 (b), the stepped pin that is less likely to be erroneously released prior to operation is provided. If the operation of turning the screw 9 is performed and then the stepped pin 7 is not pressed, the movement of the blade 1 cannot be released, and further the stepped pin 7 automatically suppresses the movement of the blade 1 after the operation. Safer.

  When the hole of the blade 1 can move up to 3 mm above the blade rest 6 with respect to the large diameter portion of the stepped pins 7 and 9 as shown in FIG. Since the blade 1 can be opened by a maximum of 3 mm, it is convenient when cutting only one sheet or about 30 sheets or less of plain paper for copying.

  If the stepped pin 7 is not released even if the cutting tool 1 is moved upward by operating the driving rod 3 while only the stepped pin 9 is released, the tool 1 moves upward to the right in FIG. In order to use it stably as a normal paper cutter, it is necessary to keep the stepped pin 9 in a locked state that suppresses the movement of the blade 1 in all steps, and thus the cutter is in a safe state. It has the effect of encouraging keeping.

  In the state where the stepped pin 9 is released, the blade 1 is tilted, and at the right end thereof, the blade 1 opens somewhat wider than 3 mm set at the position of the stepped pin 9, so that the blade tip in this case In order to avoid the danger of tentacles, it is desirable to reduce the allowable movement distance of the blade 1 by this amount.

  The front view of the safety device of the cutting machine which shows the standby state of embodiment of this invention   AA sectional view of FIG.   The front view of the safety device of the cutting machine which shows the operation state of embodiment of this invention   BB sectional view of FIG.   Partial enlarged view showing the hole shape of the blade   Sectional view showing mechanism for holding position of stepped pin   Front view of the safety device of a cutting machine with a structure where stepped pins are arranged in two places on the left and right   Partial enlarged view showing the shape of the hole allowing the movement of the blade

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutlery 2 Frame 2a Opening 3 Drive rod 4 Drive shaft 5 Rotating support shaft 6 Blade holder 7, 9 Stepped pin 8 Spring

Claims (6)

  A pair of frames each having an opening through which a sheet is passed; a blade having a straight cutting edge that is sandwiched between the frames and can be moved up and down above the opening; and the frame below the opening In the cutting machine comprising a blade pedestal having a flat portion fixed to a pair of frames, the pair of frames are provided with large and small diameter holes coaxially, and the blade has the same diameter as the large diameter hole. A hole having a width not exceeding the diameter of the large-diameter hole extending below the hole and a stepped pin having two types of diameters corresponding to each hole diameter and groove width is provided between the flat frame and the blade. A safety device for a cutting machine characterized by a structure that can penetrate and move in the axial direction.   The safety device for a cutting machine according to claim 1, wherein large diameter holes provided in the cutter are provided at both upper and lower ends of a stroke of the cutter.   The safety device for a cutting machine according to claim 1, wherein the stepping pin has a structure in which a large-diameter portion of the stepped pin is biased in a direction in which the stepped pin is pressed against the blade.   The safety device for a cutting machine according to claim 1, wherein the outer periphery of the stepped pin has either a large diameter or a small diameter as a screw, and a corresponding frame hole has a screw hole.   Stepped pins are arranged on the left and right sides of the frame, one of which energizes the large diameter portion in a direction to press the blade, and the other is the corresponding hole in the frame with the outer periphery of either the large or small diameter as a screw. The safety device for a cutting machine according to claim 1, wherein the screw machine has a screw hole structure.   The left and right stepped pins are arranged at the lowermost position of the tool stroke in which the large diameter part enters the large diameter hole of the blade, and one pin urges the large diameter part in the direction of pressing the blade, The pin has a small diameter or large diameter outer periphery as a screw, and a corresponding frame hole as a screw hole. The safety device for a cutting machine according to claim 1, wherein the safety device is a long hole extending upward or a hole having a large diameter.

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