JP5223106B2 - Drilling device - Google Patents

Description

  The present invention relates to a punching device, and more particularly, to reduce the operating force of an operating lever for punching paper by raising and lowering a slide member that supports a punch blade, and to set the operating angle of the operating lever small. The present invention relates to a perforating apparatus capable of performing.

2. Description of the Related Art Conventionally, a punching device that can punch a plurality of binding holes along an edge of a sheet is known. This perforating apparatus includes a small type and a medium size type that perform perforation in units of several or several tens of sheets, and a large type that can perform perforation of several hundred pieces.
Patent Document 1 discloses a perforating apparatus belonging to the large type.
Japanese Utility Model Publication No. 52-3743

  The perforating apparatus disclosed in Patent Document 1 includes a movable body supported by a guide body provided on the rear end side of a base, a fixed base disposed above the movable body, and the fixed base. And a handle provided so as to be rotatable relative to the mounting body, a link member connected to the handle and the moving body, and a punch blade for perforating paper as the moving body descends. ing.

However, in the punching device, the movement amount of the second connection position between the link member and the moving body is relatively small with respect to the rotation movement amount of the first connection position between the link member and the attachment body. Therefore, there is a problem that the amount of rotational movement of the handle when drilling is increased.
That is, in the perforating apparatus of Patent Document 1, the handle rotates and moves between a position where the free end side of the handle greatly protrudes rearward of the base and a position where the free end side protrudes above the front of the base. It has become.
For this reason, when the drilling device is arranged on a top plate such as a work table, a large space for securing the rotational movement amount of the handle in the front-rear direction must be secured. Therefore, for example, in the case where the rear end of the workbench is arranged so as to contact the wall surface or the like, it is necessary to position the base of the drilling device considerably ahead of the rear end of the workbench. It becomes difficult to arrange the drilling device using a work table having a small depth width.

  Further, the punching device has a link shape in which the first connecting position and the second connecting position are largely shifted in the front-rear direction as the operating lever is rotated forward during the punching operation, and transmits the operating force for lowering the punch blade. Loss increases and is not suitable for drilling with reduced operating force. This is partly due to the configuration in which the connecting position between the moving body and the link member is deviated from the axis of the punch blade.

[Object of invention]
The present invention has been devised by paying attention to such inconveniences, and an object of the present invention is to provide a punching device that can reduce the rotational movement amount of the operating lever and reduce the operating force. is there.

In order to achieve the above object, the present invention provides a base having a support surface for paper to be punched, a pair of side members disposed on the base, and a rotation shaft provided between the side members. A rotatable operating lever, a punch blade supported by a slide member provided so as to be movable up and down between the side members, and a link for connecting the operating lever and the slide member so as to be relatively rotatable A punching device provided with a punchable blade through a punching blade by rotating the operation lever to raise and lower the slide member.
The link member directly connects the operation lever and the slide member, and is provided symmetrically with respect to the center thereof .
When the connection position between the link member and the operation lever is the first connection position, and the connection position between the link member and the slide member is the second connection position, the initial position when the operation lever is not operated. In the position, the first connection position is located behind the rotation shaft, and the second connection position is located in front of the first connection position and the rotation shaft. The first connection position and the second connection position are provided so as to be located on substantially the same axis as the punch blade,
Said second connecting position of the rotational region of the lever adopts a configuration that the provided Ru, so as to be positioned substantially coaxially with the punch blades.

  The operation lever can be rotated to a lying position that is substantially parallel to the base during drilling when the tip of the punch blade abuts on the base, and rotation between the lying position and the initial position when the operating lever is not operated. A configuration in which the angle is set to approximately 120 degrees or less may be employed.

According to the present invention, since the link member directly connects the operation lever and the slide member, the number of components can be minimized without interposing a cam mechanism or the like. In addition, since the link member is provided symmetrically with respect to the center, the link member itself can be made simple, and a design that reduces the rotational movement amount of the operation lever can be easily adopted. Furthermore, since the connection position between the link member and the slide member is positioned on the substantially axis of the punch blade, it is possible to perform drilling with a comfortable operational feeling while avoiding loss of operating force.
Further, since the second connection position is provided in front of the first connection position, the punch blade supported by the slide member can be positioned in front of the rear end of the base. The position can be easily visually confirmed.
Further, the first connection position is positioned rearward with respect to the rotation shaft, and the second connection position is positioned forward with respect to the rotation shaft. The first connecting position and the second connecting position are positioned on the same axis, and the operating force can be effectively transmitted to the punch blade to reduce the operating force.
Further, by setting the rotation angle of the operation lever to be approximately 120 degrees or less, the rear end of the operation lever when not drilled does not protrude greatly to the rear of the base, and the depth of the installation space is excessively required. There is no inconvenience.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In this specification, unless otherwise specified, the term indicating the direction or position shall be used with reference to FIG. 2, and the right side in the figure is “front” while the left side is “rear”. In the figure, the direction orthogonal to the plane of the paper is “left-right direction”, the front side is “left”, and the depth side is “right”.
Further, “when not operating” is used when the operating lever is in the open limit away from the base as shown in FIG. 1, and the position of the operating lever in the open limit is the “initial position”. . “At the time of punching” means when the tip of the punch blade hits the base side and penetrates the paper, and the position of the operation lever at this time is defined as the “falling position”. When the punch blade passes through the paper and is extracted from the paper, it is “when the punching is completed”, and is in the same position as when the operation is not performed.

  FIG. 1 shows a schematic perspective view of a perforating apparatus according to the present embodiment, and FIG. 2 shows a schematic side view thereof. FIG. 3 shows a schematic front view of a part of the punching device. In these drawings, the punching device 10 includes a base 12 provided with a support surface 11 of the paper P to be punched on the upper surface side, a pair of side members 14 and 15 fixed to the rear end side of the base 12, An operation lever 18 that is rotatable about a rotation shaft 16 (see FIG. 3) provided between the side members 14 and 15 and that is rotatable between the side members 14 and 15 by the rotation of the operation lever 18. The slide member 20, the link member 21 that connects the slide member 20 and the operation lever 18 to each other, and the slide member 20 are detachably mounted via the blade holder 23 and project toward the support surface 11 side. A hollow cylindrical punch blade 24, a guard member 26 rotatably supported by the side members 14 and 15, and a pressing member 27 attached to the slide member 20 and pressing the paper P from above. It is configured to include a.

  The base 12 is provided in a shape that is long in the front-rear direction with respect to the length in the left-right direction, is provided in a shape that approximates a substantially rectangular shape in plan view, and the pair of bases 12 on both left and right sides on the rear end side of the base 12 The side members 14 and 15 are fixed. In the base 12, a centering member 30 is disposed at a position immediately in front of the side members 14 and 15, and a position restricting member 31 (see FIG. 5) is disposed in an arrangement region of the centering member 30.

  As shown in FIG. 4, the centering member 30 is provided so as to protrude in opposite directions from both the left and right sides of the base 12 and has a pair of moving members 33 having a substantially point symmetrical shape, and the protruding directions of the moving members 33. A pair of piece members 34 provided so as to be able to appear up and down on the front end side are provided. These moving members 33 connect the front and rear slide pieces 36, 37 that cross the gap formed on the lower surface side of the support surface 11 in the left-right direction and the front ends of these slide pieces 36, 37, and A slot in which the non-use position (see FIG. 1) is configured to include a connecting body 39 that is substantially flush with the side surface of the base 12, and in which the piece member 34 protrudes and retracts in the front-rear direction of the upper surface side of the connecting body 39. A hole 40 is formed. An operation piece 39A for moving the moving member 33 in the left-right direction is provided on the upper end portion of the coupling body 39 so as to be directed substantially outward in the horizontal direction, and the moving member 33 can be pulled out by grasping the operation piece 39A with a fingertip. It is like that. The moving member 33 is formed with a rack that engages with a pinion (not shown) provided in the base 12 on the lower surface side of the slide piece 36, whereby each moving member 33 moves in synchronization with the left-right direction of the base 12. It is possible.

  The piece member 34 is supported on the inner surface side of the coupling body 39 so as to be rotatable in a direction along the front-rear direction of the base 12, and is disposed so as to be parallel to each other. As shown in FIG. 4, these piece members 34 regulate the positions of the left and right side edges P2 connected to the insertion side edge P1 of the paper P, and are thus symmetric with respect to the center of the insertion side edge P1. Perforations are made in the position. In addition, a finger hook portion 34 </ b> A for hooking a fingertip to protrude from the slot hole 40 is provided at the side end of the piece member 34.

  As shown in FIG. 5, the position regulating member 31 is provided inside a connecting body 39 located on the left side. The position restricting member 31 has a tongue-like shape similar to that of the piece member 34, and is provided so as to be able to project up and down from a slot hole 43 provided inside the side wall 42 of the base 12. The position restricting member 31 is rotatably supported on the inner surface side of the side wall 42, and can be rotated so as to protrude from the slot hole 43 by hooking a fingertip on the protruding piece 31 </ b> A provided on the side end. .

The side members 14 and 15 are provided in a substantially symmetrical shape. Accordingly, the left side member 14 will be described here, and the right side member 15 will be described using the same reference numerals.
As shown in FIGS. 3 and 4, the side member 14 has a U-shaped cutout shape at the front lower portion so as to form a paper insertion space S, and the upper portion is curved in a substantially arc shape. It is provided in the shape. The side member 14 is an integrally molded product by die casting, and guide grooves 45 are formed on the inner surface of the side member 14 so as to be capable of ascending and descending both ends of the slide member 20 in the left-right direction. Yes. In addition, a stepped through hole 46 is formed in the center near the upper part, and the rotation shaft 16 that is the rotation center axis of the operation lever 18 is spanned between the opposite side member 15 in the through hole 46. Yes. The rotating shaft 16 is attached via a fixing bolt 50 inserted from the outer surface side of the side member 14.
In addition, a knob member 51 is provided at the center of the upper end of the side member 14 so that the operation of the operation lever 18 can be prohibited or released by rotating the knob member 51 in the left-right direction. It has become.

  The operation lever 18 is provided with a pair of left and right plate-like arms 54 each having one end fixed to the rotary shaft 16, and the other end of the arm 54, i.e., the free end. It is comprised by the character-shaped handle part 56, and these arms 54 and the some reinforcement bar | burr 57 arrange | positioned between the handle parts 56. FIG. As shown in FIG. 2, when the operation lever 18 is not operated or when drilling is completed, the operation lever 18 has an open position at an initial position tilted backward by an angle θ1 with respect to a vertical line L1 orthogonal to the axis of the rotary shaft 16. On the other hand, at the time of drilling, the position tilted downward by an angle θ2 with respect to the horizontal line L2 orthogonal to the rotation shaft 16 can be rotated as a lying position. The rotation angle of the operation lever 18 is not particularly limited, but is set to about 120 degrees in the present embodiment, and the θ1 and θ2 are set to 24.5 degrees and 5.5 degrees, respectively.

As shown in FIG. 2, the slide member 20 is supported between the side members 14 and 15 at a position in front of the rotating shaft 16 so as to be movable up and down. As shown in FIG. 6, the slide member 20 includes a main body block 60 that is formed in a block shape that is long in the left-right direction in a plan view, and side end blocks 61 that are integrally provided on the left and right sides of the main body block 60. . The slide member 20 is configured such that the side end block 61 is received in a guide groove 45 formed on a relative surface of the side members 14 and 15 and can be moved up and down along the guide groove 45. In the central portion of the main body block 60, two substantially elliptical convex portions 63 whose upper and lower directions are on the long axis side are formed at two upper and lower portions, and the pressing member 27 is supported using these convex portions 63. It is like that. In addition, a holder mounting portion 65 for detachably mounting the blade holder 23 is formed in two regions on both the left and right sides of the main body block 60, and a link member is provided between the upper portion of the main body block 60 and the side end block 61. 21 mounting spaces S1 are formed.
In addition, the slide member 20 in the present embodiment is not particularly limited, but an integrally formed product by die casting is adopted, and a plurality of upper surface portions 66 and lower surface portions 67 are provided in order to achieve overall weight reduction. Are formed so that hollow portions and concave portions are dotted in portions other than the essential structural portion, such as the holder mounting portion 65.

  The side end block 61 includes a hole 70 positioned on the same axis as the hole 69 formed in the side end surface of the main body block 60, and a weight reduction recess 71 is formed at each of the upper and lower portions of the hole 70. Yes.

  As shown in FIGS. 3, 6, and 7, the holder mounting portion 65 is provided on the lower surface portion 67 of the main body block 60, and a pair of insertion guides 73 that guide the blade holder 23 so as to be movable back and forth, And a receiving portion 74 for receiving the upper region of the blade holder 23. The insertion guide 73 is provided in a substantially U-shaped rail shape oriented in the front-rear direction, and is arranged so that the open sides thereof face in opposite directions. Here, the front end side of the insertion guide 73 is an inclined surface 73 </ b> A, which allows angular displacement of the blade holder 23 when the blade holder 23 is attached and detached.

  The receiving portion 74 is provided between two partition portions 68 positioned at an upper portion between the insertion guides 73. As shown in FIG. 7, the receiving portion 74 includes a base portion 75 located at the lower portion of the partition portion 68, an upright portion 76 that is directed upward from near the middle in the front-rear direction of the base portion 75, and the upright portion 76. An inclined upright portion 77 that inclines toward the upper rear from the upper end, and an upper flat portion 79 that is continuous with the upper end of the inclined upright portion 77 and is directed in the front-rear direction. The base 75 includes a passage 80 that opens in the up-down direction immediately behind the upright portion 76, and the rear side of the passage 80 is formed as an inclined surface 81 whose upper surface position becomes lower toward the rear. . Further, a notch portion 82 is formed on the lower surface side of the front end portion of the base portion 75, while a claw portion 84 that protrudes upward is formed on the front end side of the upper flat surface portion 79.

  The link member 21 is provided in the attachment space S1 (see FIG. 6) between the main body block 60 and the side end block 61 so as to connect the operation lever 18 and the slide member 20. . As shown in FIGS. 2 and 3, the link member 21 is a substantially arc-shaped piece that directly connects the portion of the operation lever 18 near the rotating shaft 16 of the arm 54 and the upper portion of the slide member 20. It is formed using. The link member 21 is provided symmetrically with respect to the center thereof, and the connection position between the link member 21 and the operation lever 18 is the first connection position A1, while the link member 21 and the slide member 20 are connected. When the position is the second coupling position A2, the first coupling position A1 at the initial position of the operation lever 18 is located at the rear upper part with respect to the rotation shaft 16, while the second coupling position A2 is the rotation shaft. 16, the first connecting position A <b> 1 and the second connecting position A <b> 2 are located on substantially the same axis as the axis of the punch blade 24 at the lying position of the operation lever 18. Is set to

  As shown in FIG. 3, the link member 21 is configured as a set of two. One end side of the link member 21 is disposed so as to sandwich the plate surface of the arm 54 of the operation lever 18 and is connected so as to be relatively rotatable via the shaft pin 86 so that the first connection position A1 is configured. It has become. On the other hand, the other end side of the link member 21 is in a state where the spacer 87 is disposed, and both ends of the shaft pin 89 penetrating through the spacer 87 are inserted into the hole 69 formed in the main body block 60 and the side end block 61. By supporting the formed hole 70, the second connection position A2 is formed.

  As shown in FIG. 7, the blade holder 23 includes a lower unit 90 that supports the punch blade 24, and an upper unit 91 that is connected to an upper portion on the front end side of the lower unit 90. As shown in FIG. 6, the lower unit 90 includes a substantially square bottom 92 in plan view, a front wall 93, a pair of left and right side walls 94, a rear wall 95, and a connecting convex portion protruding from the front wall 93. 97. A support tube 98 that allows the punch blade 24 to be inserted / removed from above is formed at the center of the bottom portion 92, and a ridge portion 100 directed in the front-rear direction is provided on the inner surface of the side wall 94. . Further, the rear wall 95 is formed with cutout portions 95A on both the left and right sides, and the protruding portion 100 can be positioned in the insertion guide 73 by the cutout portions 95A. Here, in the state where the lower unit 90 is supported by the insertion guide 73, the protruding portion 100 has an upper end surface 100A located in a horizontal plane while a lower end surface 100B is forward (see FIG. 7). It is formed as an inclined surface that gradually rises toward the middle right). The connecting projection 97 is formed with a pair of left and right protrusions 102 and a hole 104 penetrating in the vertical direction between the protrusions 102.

  The upper unit 91 has a lower shape that fits into the protrusion 102 and has a piece member 105 whose upper portion is bifurcated in a side view, and is rotatably attached to an upper end portion of the piece member 105. A stopper 106 is included. The upper unit 91 is integrated by connecting the lower ends of the piece-like members 105 with screws (not shown) inserted from the lower ends of the connecting projections 97. Further, the stopper 106 has a lever shape having a downward hook-like portion 106A at the lower end of the rear end, and the hook-like portion 106A side can be displaced upward by being pushed down from above with the front end side as an operation end. The hook-shaped portion 106 </ b> A is formed to engage with the claw portion 84. The stopper 106 is provided so as to maintain the position shown in FIG. 7 with respect to the piece-like member 105 by a spring (not shown) attached around the rotation axis, and the hook-like portion 106A is engaged with the claw portion 84. In the combined state, the angular displacement of the blade holder 23 is regulated.

  As shown in FIG. 8, the punch blade 24 is provided in a hollow cylindrical shape, and is provided so that the lower end cross section is formed at an acute angle and punches out the paper P, while the upper end portion is a large diameter cylindrical portion. 24A and can be seated in the support cylinder 98. As shown in FIG. 7, the upper end of the large diameter cylindrical portion 24 </ b> A has a lower outer periphery of the passage 80 so as to communicate with the passage 80 in a state where the blade holder 23 is mounted on the main body block 60 of the slide member 20. In this state, the inside of the punch blade 24 and the passage 80 communicate with each other in a state where the axial movement of the punch blade 24 is restricted, and the scraps Pa of the paper P passing through the punch blade 24 (see FIG. 8). ) Is dropped to the rear side through the passage 80 and can be collected in a tray (not shown).

  The guard member 26 is normally disposed so as to be positioned in the insertion space S, and is provided so as to be vertically displaceable with respect to the base 12. The guard member 26 connects a pair of left and right plate-like arms 108 rotatably supported on the outer surface side of the side members 14 and 15 via a shaft 107 and the front end sides of these plate-like arms 108. It consists of a guard part main body 109 located in the insertion space S. As shown in FIG. 9, the guard unit main body 109 includes a pair of left and right upstanding surfaces 110 orthogonal to the paper insertion direction (the direction of arrow a in FIG. 1), and an inclined surface 111 positioned between the upright surfaces 110. It is provided in the provided shape. The standing surface 110 includes a front upper standing surface 113 and a rear lower standing surface 117 connected to the lower end of the front upper standing surface 113 via a horizontal surface 115, and the inclined surface 111 is formed on the front upper standing surface 113. The projecting surfaces 119 that are directed forward from the inner ends are connected to each other, and are provided in a shape that inclines backward as it goes downward. The lower rear standing surface 117 and the lower end of the inclined surface 111 are provided so as to continue to the flat bottom surface 120. Here, the pair of standing surfaces 110 are disposed in a front region corresponding to the punch blade 24.

  As shown in FIGS. 3 and 6, the pressing member 27 extends in the left-right direction and is connected to an elongated plate-shaped pressing surface portion 130 that presses the paper P from above, and a center portion of the front end of the pressing surface portion 130. The mounting part 131 is attached so as to be relatively movable along the vertical direction of the slide member 20, and the upper part 132 is located on the upper side of the slide member 20 from the mounting part 131. In the surface of the pressing surface portion 130, notched portions 135 are formed at two positions on the left and right sides, and the punch blade 24 passes through the notched portion 135 in the vertical direction. Here, as shown in FIG. 3, the left and right end sides of the pressing surface portion 130 come into contact with the stepped portions 14 </ b> A and 15 </ b> A formed on the lower end surfaces of the side members 14 and 15 from below. The upper limit of the pressing member 27 is set at the position. In the holding surface portion 130, spring receiving raised portions 130 </ b> A that are opposed to spring receiving convex portions 136 provided on the lower surface side of the upper surface portion 66 of the main body block 60 are formed at two positions at the rear of the mounting portion 131. A coil spring 137 is disposed between the spring receiving convex portion 136 and the spring receiving raised portion 130 </ b> A, whereby a downward force is applied to the pressing member 27.

  The mounting portion 131 is provided in a plate shape, and its surface is provided in a direction along the left and right or up and down directions. In the central portion of the mounting portion 131, there are two slot holes 138 directed in the up and down direction. Is formed. In these slot holes 138, a convex portion 63 provided in the central portion of the slide member 20 is positioned. By screwing a screw 140 with a washer (see FIG. 3) into the convex portion 63, The pressing member 27 is attached to the slide member 20 in a state that can be relatively displaced in the vertical direction.

  As shown in FIGS. 6 and 7, the upper portion 132 of the holding member 27 includes an upper plate surface portion 141 that is directed rearward from the upper end of the mounting portion 131 and crosses the upper surface side of the slide member 20 in the front-rear direction. It comprises a curved surface portion 143 that continues to the rear end of the plate surface portion 141. The curved surface portion 143 is oriented so that the upper side is opened, and the curved surface portion 143 is provided so as to abut against and engage with the outer peripheral surface of the lower half portion of the rotating shaft 16. The curved surface part 143 is engaged with the outer peripheral surface of the lower half of the rotary shaft 16 from the lower side at the same time that both ends of the pressing surface part 130 abut against the stepped parts 14A and 15A provided on the lower surfaces of the side members 14 and 15. 27 ascend limit.

  In FIG. 1, reference numeral 144 denotes a back cover that covers the rear half of the side members 14 and 15, and reference numeral 145 denotes a front cover that covers the front half. These covers are attachable to and detachable from the side members 14 and 15, and a tray (not shown) is disposed in the lower half of the back cover 144 so that the trays (not shown) can be taken in and out. It has become so. Reference numeral 146 denotes a dial that adjusts the insertion amount of the paper P in the insertion direction.

  Next, the overall operation of the perforating apparatus 10 according to the present embodiment will be described with reference to FIGS. 10 to 12 as well.

  When the punch blade 24 is replaced or when the paper P is placed on the support surface 11 of the base 12, as shown in FIG. 11, the operation lever 18 is kept in an upright position. At this time, by rotating the knob 51 located at the upper end of the side member 14 to a posture in which the knob 51 is raised along the operation lever 18, the rotation operation of the operation lever 18 can be prohibited. In addition, the position of the knob member 51 shown in FIG. 12 is in a state where the operation lever 18 is allowed to rotate.

  When perforating a large number of sheets P, for example, about 300 sheets of paper P, the knob 51 is rotated upright to allow the operation lever 18 to rotate (see FIG. 1). The paper P may be placed on the support surface 11 of the base 12 and the insertion side edge P1 may be inserted in the direction of arrow a. At this time, when drilling at a symmetrical position with respect to the center of the insertion side edge P1, the centering member 30 is pulled out from the side end of the base 12, as shown in FIG. 34 may be disposed so that the side edge P2 of the paper P is in contact with each inner surface of the piece member 34.

The guard member 26 that exists so as to block the insertion space S has the inclined surface 111 positioned in front of the upright surface 110, and thus the guard member 26 rotates so that the inclined surface 111 rides on the insertion side edge P1. Accordingly, the insertion-side edge P1 region of the paper P can be inserted into the insertion space S.
On the other hand, in the state where no perforation is performed, the inclined surface 111 is located at the center and the standing surfaces 110 are formed on both the left and right sides thereof. The guard member 26 will not be rotationally displaced unless it only strikes the upright surface 110 and consciously applies an upward force. Accordingly, it is possible to greatly reduce the risk that may be caused by inadvertently accessing a finger in the insertion space S.

  In the punching operation on the paper P, as shown in FIG. 2, the handle portion 56 of the operation lever 18 in the initial position may be grasped and rotated toward the punching position. The first connecting position A1 moves forward in the range from the initial position through the vertical line L1 to the vicinity of the inclined straight line L3 having the same angle as θ1. As a result, the amount of lowering of the slide member 20 relative to the amount of rotation of the operating lever 18 is relatively small, but when passing near the straight line L3, the first connection position A1 becomes a vertical line passing through the second connection position A2. Since the position is close, the amount of lowering of the slide member 20 is relatively large.

  When the slide member 20 is lowered and the pressing surface portion 130 of the pressing member 27 contacts the uppermost sheet P, a pressing force is applied to the sheet P. When the operation lever 18 is further rotated in this state, the slide member 20 is lowered relative to the press member 27 in a state where the press member 27 is restricted from being lowered. The punch blade 24 can be driven into the hole to perform perforation.

  And when the punch blade 24 abuts against a punch receiving surface portion (not shown) of the support surface 11, the punch blade 24 penetrates all the sheets P. At this time, as shown in FIG. 2, the operating lever 18 is in the lying position rotated by an angle θ2 from the horizontal line L2.

  Next, when the operation lever 18 is rotated in the reverse direction, the pressing force by the pressing surface portion 130 is sufficiently exerted on the paper P in the initial stage. It slips out of the paper P and rises with the slide member 20. However, since the pressing force of the pressing surface portion 130 decreases as the slide member 20 moves up, the punch blade 24 is unlikely to come out of the upper sheet P, and the upper sheet P is punched out by separating the sheet P up and down. It tends to rise with the blade 24. This is because the holding surface portion 130 is positioned higher than the front end of the punch blade 24 against the force of the coil spring 137 due to the presence of the upper sheet P lifted accompanying the front end side of the punch blade 24. caused by.

  By further rotation of the operation lever 18, both end sides of the pressing surface portion 130 come into contact with the step portions 14 </ b> A and 15 </ b> A provided on the lower ends of the side members 14 and 15, and the curved surface portion 143 comes into contact with the rotating shaft 16 and rises. Then, since the punch blade 24 rises together with the slide member 20 with respect to the pressing surface portion 130, the rotation of the operation lever 18 thereafter increases. The sheet P is forcibly dropped from the front end side of the punch blade 24, whereby the punch blade 24 comes out of all the sheets P.

  As described above, since the punch blade 24 is extracted after the pressing surface portion 130 reaches the rising limit, a constant load is applied to the contact surface between the pressing surface portion 130 and the step portions 14A and 15A. In this embodiment, the pressing surface portion 130 abuts against the step portions 14A and 15A, and at the same time, the curved surface portion 143 provided on the upper portion of the pressing member 27 abuts against the outer peripheral surface of the lower half portion of the rotating shaft 16, and thus the load Will be distributed to a plurality of locations above and below. Thereby, deformation of the pressing member 27, damage to the step portions 14A and 15A, and the like are avoided.

When four holes are punched in the insertion side edge P1 of the paper P, the centering member 30 is pulled out from the base 12 and the position restricting member 31 is raised as shown in FIG. . In this state, with one side edge P2 of the paper P abutting against the position regulating member 31, the insertion side edge P1 of the paper P is inserted into the insertion space S, and the operation lever 18 is rotated as described above. Just operate. At this time, the centering member 30 located on the right side supports an area that protrudes from the support surface 11 of the base 12 as an expanded support surface, prevents the area from drooping, and shifts the sheet position due to drooping. Is effectively avoided.
In this way, after punching in two places on the insertion side edge P1, the bundle of sheets P is turned upside down, the position restriction member 31 performs position restriction, and the hole is inserted, thereby making the insertion side edge P1. A total of four holes can be drilled with respect to the center. That is, the number of punches twice as many as the punch blades 24 can be performed by performing the punching operation twice under the condition that the work of inverting the front and back of the cover sheet P is performed once in the middle.

By the way, by punching, the punch blade 24 is clogged in a state where a large number of pieces Pa are compressed (see FIG. 8). In the state where the blade holder 23 is mounted on the main body slide 60 of the slide member 20, the scrap Pa is formed between the joints of the punch blade 24 and the passage 80 by connecting them in a straight line. It will be present in a series of rods so as to straddle. Therefore, even if it is attempted to remove the blade holder 23 in front of the main body slide 60 in order to perform maintenance and inspection, such as replacement of the punch blade 24, it becomes difficult due to the compressed waste Pa that is continuous in a bar shape.
Therefore, by pushing down the front end side serving as the operation end of the stopper 106 to release the engagement between the hook-shaped portion 106A and the claw portion 84, the inclined surface 100B provided on the lower surface side of the ridge portion 100 causes the lower portion The unit 90 can be tilted, and the blade holder 23 as a whole can be tilted so that the upper part is on the near side, and the scraps Pa connected in a bar shape can be folded. Therefore, in this inclined posture, as shown in FIG. 10, the blade holder 23 can be removed without difficulty by operating it to be pulled forward, and the punch blade 24 is extracted to the upper part of the support cylinder 98 of the lower unit 90. Exchange etc. can be performed.

Therefore, according to such an embodiment, the operating angle of the operating lever 18 can be set smaller than that of the large conventional type disclosed in Patent Document 1, and the operating force can be reduced to perforate several hundred sheets of paper. In addition to this, access to fingers in the insertion space S can be prohibited to improve safety.
Further, when the punch blade 24 is extracted from the paper P, it is possible to prevent damage to the pressing member 27 and a portion related thereto.
Further, the factor that makes it difficult to remove the blade holder 23 due to the scraps Pa can be eliminated and the blade holder 24 can be attached and detached easily and quickly. Even if the blade holder 23 can be tilted, the stopper 106 is always used. The mounting position of the blade holder 23 can be held at a fixed position.
Further, when punching twice as many as the number of punch blades 24, the support surface of the paper P can be enlarged by using the centering member 30, so that the inconvenience of the paper P shifting the surface position relative to each other can be avoided. However, drilling can be performed at a predetermined position.

The best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this.
That is, the invention has been illustrated and described with particular reference to particular embodiments, but it should be understood that the above-described embodiments are not deviated from the technical idea and scope of the invention. On the other hand, those skilled in the art can make various modifications in shape, material, quantity, and other detailed configurations.
Therefore, the description limited to the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

  For example, in the said embodiment, although it was set as the structure which uses two link members 21 for each one side, it can also be comprised by one link member. The length and curvature of the link member 21 can be arbitrarily determined within a range in which the rotation angle of the operation lever 18 is not increased.

  Further, the inclined surface 111 of the guard member 26 is sufficient if it can ride on the edge P1 of the paper P when the paper P is inserted into the insertion space S. It may be much smaller than the example. Further, the inclined surface 111 may be dispersed at a plurality of locations. In short, the present invention only needs to have the upstanding surface 110 in the front region of the punch blade 24.

  Further, the position restricting member 31 can be provided corresponding to the centering members 30 on both the left and right sides. In such a configuration, the number of punches twice as many as the punch blades 24 can be formed by simply shifting the paper P in the left-right direction without inverting the front and back of the paper P. The position restricting member 31 in this case may be used by raising one side at a time.

  Furthermore, the blade holder 23 is not limited to the configuration in which the upper portion is inclined and attached so as to be on the near side, but may be attached and detached with the upper portion inclined so as to face rearward. In short, what is necessary is just to be comprised so that attachment / detachment of the blade holder 23 may not be prevented by the scraps Pa.

The schematic perspective view which shows the whole structure of the punching apparatus which shows the state which has an operation lever in an initial position. The schematic side view of the said perforation apparatus. FIG. 2 is a schematic front view of a part of the punching device. The schematic perspective view similar to FIG. 1 which shows the use condition of a centering member. The schematic perspective view similar to FIG. 1 which shows the use condition of a position control member. The disassembled perspective view which shows a part of slide member, paper pressing member, and blade holder. The fragmentary sectional view which shows the state with which the blade holder is mounted | worn with the slide member. The fragmentary sectional view which shows the state in the middle at the time of attaching or detaching a blade holder to a slide member. (A) is a side view of a guard member, (B) is a plan view of the guard member, and (C) is a front view of the guard member. The fragmentary sectional view which shows the state of the initial stage or the last stage at the time of attaching or detaching a blade holder to a slide member. The schematic perspective view similar to FIG. 1 which shows the use condition of a position control member. The schematic perspective view of the drilling apparatus which shows the state in which the operation handle fell to the position at the time of drilling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Punching device 11 Support surface 12 Base 14, 15 Side member 16 Rotating shaft 18 Operation lever 20 Slide member 24 Punch blade 21 Link member A1 1st connection position A2 2nd connection position P Paper

Claims (2)

A base having a support surface for the paper to be punched, a pair of side members disposed on the base, an operation lever that is rotatable about a rotation shaft provided between the side members, and the side member A punch blade that is supported by a slide member that can be moved up and down and protrudes toward the base side, and a link member that connects the operation lever and the slide member in a relatively rotatable manner, and rotates the operation lever. In the punching device provided so that the paper can be punched through the punch blade by moving the slide member up and down,
The link member directly connects the operation lever and the slide member, and is provided symmetrically with respect to the center thereof .
When the connection position between the link member and the operation lever is the first connection position, and the connection position between the link member and the slide member is the second connection position, the initial position when the operation lever is not operated. In the position, the first connection position is located behind the rotation shaft, and the second connection position is located in front of the first connection position and the rotation shaft. The first connection position and the second connection position are provided so as to be located on substantially the same axis as the punch blade,
The perforating apparatus, wherein the second connecting position is provided so as to be positioned on substantially the same axis as the punch blade within the rotation range of the operation lever. The operating lever can be rotated to a lying position that is substantially parallel to the base during drilling when the tip of the punch blade hits the base, and the rotation angle between the lying position and the initial position when the operating lever is not operated is claim 1 Symbol placing the perforation device, characterized in that it is set below about 120 degrees.

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