JP6645340B2 - Stapler - Google Patents

Description

  The present invention relates to a stapler.

  A stapler is used to bind a plurality of stacked sheets. Such a stapler generally uses a metal needle. However, the metal needle needs to be removed for sorting when the paper is incinerated or shredded or when it is recycled, which is troublesome. In addition, there is a demand to avoid the incorporation of foreign matter, such as iron needles, when used in foods. In view of this, there are devices using non-metallic needles made of paper, synthetic resin, or the like that does not require such trouble (see Patent Documents 1 and 2).

  A stapler using such a non-metallic needle has a non-metallic needle formed in a U-shape from one side of a sheet by punching a through hole in the sheet, and a non-metallic needle protruding to the other side of the sheet. The paper is spelled out by bending the needle leg of the needle.

  For this purpose, the stapler has at least a penetrating mechanism for raising and lowering a pair of left and right punching blades capable of holding a U-shaped non-metallic needle with respect to the paper, and a non-metallic projection protruding to the other side of the paper. A folding mechanism is provided for bending the needle legs of the needle inward along the other surface of the sheet and for attaching the left and right needle legs.

  Further, a plurality of non-metallic needles are connected in a flat state to form a belt-shaped connecting needle so that continuous operation is possible.

  Then, the stapler cuts the leading non-metallic needle one by one from the leading end of the connecting needle transported by the transport mechanism and the transporting mechanism that transports the leading end of the band-shaped connecting needle along the transport path. And a cutting and forming mechanism for forming into a U-shape. The non-metallic needle cut and formed by the cutting and forming mechanism is loaded between the pair of left and right extraction blades of the penetrating mechanism by the above-described transport mechanism.

  In addition, in order to make the belt-shaped connecting needle longer and easier to use, it is also wound in a roll shape. The stapler has a structure that can handle the roll-shaped connecting needle.

JP 2013-166208 A JP 2008-44056 A

  However, the staplers described in Patent Documents 1 and 2 have the following problems. That is, the staplers described in Patent Literatures 1 and 2 include a forming mechanism for forming a flat nonmetallic needle into a U-shape. The forming mechanism of Patent Literature 1 can rotate an opening holding member for holding the pair of needle legs of the U-shaped non-metallic needle on a forming plate that bends the non-metallic needle into a U-shape via a shaft. Attached to. In addition, it also has a guide for guiding the opening holding member. In such a forming mechanism, when forming the needle leg with the forming plate, the opening press member is rotated in the opening direction to retreat to a position where the needle leg does not come into contact with the open press member. Then, the holding member is rotated in the closing direction to hold the needle leg. For this reason, it is necessary to adjust the timing between the molding operation and the rotation operation of the opening holding member, and the number of parts is large and the configuration is complicated.

  On the other hand, the molding mechanism disclosed in Patent Document 2 integrally forms a pair of the opening holding portions and the forming plate and fixes the opening holding portions so as not to rotate, so that the number of parts is small and the operation timing is adjusted. Etc. are unnecessary. However, when the needle leg is formed, a load is applied when the needle leg gets over because the needle leg is elastically deformed and passes over the opening presser portion located at a position higher than the tip of the needle leg. For stable molding of the non-metallic needle, it is desirable that the burden on the needle foot be smaller.

  The present invention has been made to solve the above problems, and has as its object to provide a stapler capable of forming a nonmetallic needle more stably.

In order to solve the above problems, the present invention provides a forming mechanism for bending a non-metallic needle in a flat state to form a U-shape,
A needle holding mechanism for holding a needle leg of the non-metallic needle formed into a U-shape, wherein the U-shaped non-metallic needle is formed between the forming mechanism and the needle holding mechanism. In the stapler where the exchange is performed,
The forming mechanism and the needle holding mechanism are provided so as to be relatively movable with respect to the non-metal needle along a direction in which the non-metal needle is bent in a U-shape, and the forming mechanism and the needle holding mechanism are provided. Are provided so as to be relatively movable with respect to each other, and have a forming member that bends the non-metallic needle to form a U-shape,
The forming member extends substantially parallel to a direction in which the non-metallic needle is bent to form a U-shape, and holds the pair of needles of the non-metallic needle formed in a U-shape while bending the needle-leg. It has a pair of arm portions that
The pair of arms are elastically deformable in a direction of expanding and contracting the distance between each other, and the distance between the distal ends holding the distal ends of the pair of needle legs is formed in a U-shape. It is configured to be narrower than the interval between the pair of needle legs of the needle,
The forming mechanism is configured to bend the needle leg of the non-metallic needle in a moving direction by relatively moving with respect to the non-metallic needle and the needle pressing mechanism,
When the forming mechanism bends the non-metallic needle into a U-shape, the needle holding mechanism retracts to a position where it does not come into contact with the bent needle leg, and is bent and formed into a U-shape. When receiving the needle, the needle is relatively moved toward the non-metallic needle, thereby holding the needle leg of the non-metallic needle formed in a U-shape.

  According to the present invention, a stapler capable of more stably forming a nonmetallic needle can be provided by the above configuration.

FIG. 2 is an overall perspective view of the stapler. It is a side view of FIG. It is the whole metal needle perspective view. FIG. 4 is a diagram illustrating a state where sheets are bound with non-metallic needles. It is a top view which shows the state which connected the nonmetallic needle to the connection needle. It is a perspective view which shows the state which wound the connection needle in the roll shape. It is a top view showing the modification of a nonmetallic needle. It is explanatory drawing of the guide part for parallel binding. It is explanatory drawing of the guide part for square binding. FIG. 2 is an overall perspective view of the stapler similar to FIG. 1 with a main body cover removed. It is the perspective view which cut the stapler lengthwise. It is the side view which cut the stapler at the width center position lengthwise. FIG. 2A is an overall perspective view of a stapler viewed from a diagonally upper rear side, and FIG. 12A is a perspective view similar to FIG. 12, in which a connecting needle is passed through a transport path, and FIG. It is a figure showing a conveyance way constituent member. Among them, (a) is a perspective view seen from the front side, (b) is a perspective view seen from the rear side, (c) is a front view, (d) is a plan view, and (e) is a side view. FIG. 3 is a vertical cross-sectional view of the stapler when the transport mechanism is viewed from the side. FIG. 2A is an overall perspective view of a stapler (with a conveyance path component removed) viewed from a diagonally upper rear side, and FIG. It is a figure showing a pusher. Among them, (a) is a perspective view as viewed obliquely from the front, (b) is a perspective view as viewed from above, and (c) is a plan view. FIG. 4 is an exploded perspective view illustrating a relationship between a feed claw of a pusher and a hole 4 (feed hole) of a connecting needle. It is a perspective view which shows the relationship between the feed nail | claw of a pusher, and the hole part (feed hole) of a nonmetallic needle. FIG. 3 is a perspective view showing an operation state of a pusher (a state in which a nonmetallic needle is in a cutting and forming mechanism). FIG. 4 is a perspective view showing an operating state of a pusher (a state before a non-metallic needle is sent between the punching blades of the penetration mechanism). FIG. 4 is a perspective view showing an operating state of the pusher (a state after a non-metallic needle has been sent between the extraction blades of the penetrating mechanism). FIG. 4 is a schematic side view of the stapler, showing a state of attaching and detaching a staple cover. The staple cover is partially cut away to show the interior. (A) is an overall perspective view of the stapler to which the staple cover is attached as viewed obliquely from the upper rear, and (b) is a partially enlarged view thereof. FIG. 4 is a diagram illustrating a staple cover. Among them, (a) is a perspective view as viewed from an obliquely upper side, (b) is a perspective view as viewed from an obliquely horizontal side, (c) is a perspective view as viewed from an obliquely lower rear side, and (d) is an obliquely lower front side. It is the perspective view seen from. FIG. 6 is a diagram illustrating a relationship between a pedestal of a conveyance path and a needle protecting protrusion of a staple cover. Among them, (a) is an overall perspective view, and (b) is a partially enlarged front view. It is a side view which shows the use state of a 1st non-return nail. It is a side view (state in which three unconnected needles have remained) which shows the use state of the 1st non-return nail. It is a side view which shows the use condition of a 2nd non-return nail. It is a side view showing the state after use of the 2nd check nail. It is a top view which shows arrangement | positioning of the 1st non-return nail | claw and a 2nd non-return nail, and a use state. Among them, (a) shows a case where there are many remaining connection needles, (b) shows a case corresponding to FIG. 27A (three remaining states), and (c) shows a case corresponding to FIG. 28 (two remaining states). It is. FIG. 4 is a partially enlarged side view illustrating a relationship between a cover guide of the stapler and a guide protrusion of the staple cover. Among them, (a) is a diagram showing a state at the initial stage of mounting, (b) is a diagram showing a state at the middle stage of mounting, and (c) is a diagram showing a state at the latter stage of mounting. FIG. 3 is an overall vertical cross-sectional view of the stapler, showing a self-holding structure of a connecting needle. FIG. 33 is a partially enlarged view of FIG. 32. It is a top view of the tip part of a connection needle which shows the self holding structure of a connection needle. FIG. 35 is a partially enlarged view of FIG. 34. FIG. 35 is a plan view similar to FIG. 34, showing a modification of the contact surface provided on the transport path constituting member. FIG. 35 is a plan view similar to FIG. 34, illustrating another modified example of the contact surface provided on the stapler body. FIG. 27 is a partially enlarged front view similar to FIG. 26 (b), showing a state when the connecting needle is removed. It is a perspective view of the component member of a cutting-forming mechanism and a penetration mechanism. FIG. 8 is an operation diagram of the cutting and forming mechanism and the penetrating mechanism, showing a state from a standby state to a state in which a non-metallic needle is formed and a needle tip is picked up by a needle holding portion of a needle holding plate. It is an operation | movement drawing of a cutting | disconnection shaping | molding mechanism and a penetration mechanism, and shows the state from the state in which the needle holding plate hold | maintains the nonmetallic needle after shaping | molding to the state in which a nonmetallic needle is pushed out into a removal blade by a pusher. It is an operation | movement diagram of a removal blade guide. Among them, (a) shows the initial position of the punching blade guide, and (b) shows a state where the punching blade guide is retracted and the first guide part starts retreating from between the punching blades while guiding the punching blade. (C) shows a state in which the second guide portion is disposed between the punching blades and the bending operation by the bending mechanism is being performed, and (d) shows a state where the bending operation of the punching blade guide is completed and the punching blade guide is moved. Indicates a stopped state. It is an operation | movement diagram of a link and shows a standby state. FIG. 9 is an operation diagram of the link, showing a state in which the link is lowered by the lowering of the link shaft, the pusher is retracted, and the link is released from the needle holding plate. It is an operation | movement diagram of a link and shows the state in which the link rotated and the slide member started retreating. It is an operation | movement diagram of a link and shows the state in which the slide member was retracted. It is an operation | movement diagram of a link, and shows the state in which the link shaft reached the lowest point and the slide member most retracted. FIG. 9 is an operation diagram of the link, showing a state in which the link rotates in the return direction due to the rise of the link shaft, and the slide member advances and returns to the standby position. FIG. 3 is an explanatory diagram of a driver main body. Among them, (a) is a plan view, (b) is a front view, (c) is a side view, (d) is a cross-sectional view, and (e) is a back view. The driver body when the crown retainer is bottomed is shown. Among them, (a) is a front view, (b) is a side view, and (c) is a cross-sectional view. It is a figure showing the component of a bending mechanism. Among them, (a) is a perspective view of a bending unit, (b) is a perspective view of a bonding member, and (c) is a perspective view of a slide member. It is a top view of a slide member. FIG. 4 is an explanatory view of a guide surface provided on the stapler main body, and is a perspective view of the stapler main body from obliquely below. It is a perspective view in the state where each component of a bending mechanism and a link were assembled. It is an operation | movement figure of a slide member. Among them, (a) shows a standby state before the operation of the slide member, (b) shows a state where the slide member has started operation, and (c) shows a state where the slide member has stopped. It is an operation | movement drawing of a bending member, and the non-metallic needle is inserted in paper, and shows the standby state before operation | movement of a bending member. FIG. 9 is an operation diagram of a bending member, showing a state in which a first bending member and a second bending member are sequentially operated to bend one and the other needle legs in this order. It is an operation | movement drawing of a bending member, and shows the state in which one and the other needle legs are stuck by the sticking member. It is an operation | movement drawing of a bending member, and shows the state which lowered the 1st bending member in order to avoid interference with the other needle leg. It is an operation | movement diagram of a bonding member. Among them, (a) shows a standby state before the operation of the bonding member, (b) shows a state where the bonding member is rotating, and (c) shows a state where the bonding member bonds a pair of needle legs. Indicates a state in which It is explanatory drawing of the modification of a bending mechanism. Among them, (a) is an example in which the first and second bending members are urged in the push-up direction by two coil springs, and (b) is an example in which the first and second bending members are pushed down by the two coil springs. (C) is an example in which one coil spring urges the first and second bending members in the push-up direction.

  Hereinafter, the present embodiment will be described in detail with reference to the drawings.

  1 to 52 are for describing this embodiment.

  <Overall Configuration of Stapler> The overall configuration of the stapler of this embodiment will be described below.

  First, the “direction” will be described with reference to the perspective view of FIG. 1 (or the side view of FIG. 1A). In this embodiment, the stapler 1 has the front side as the front, the back side as the reference, the right side as the right side, the left side as the left side, the upper side as the upper side, and the lower side as the bottom with respect to the direction of inserting the paper. That is, it is the front-back direction X, the left-right direction Y, and the up-down direction Z. However, the directions are relative.

  Next, a needle (staple) used for the stapler 1 will be described with reference to FIG. The needle is a nonmetallic needle 2 (or a soft needle) made of paper, synthetic resin, or the like. The direction of the non-metallic needle 2 will be described with reference to a state where the non-metallic needle 2 is mounted on the stapler 1.

  One non-metallic needle 2 has an inverted U-shape (or a downward U-shape) having a pair of left and right needle legs 2b and 2c that are bent at substantially right angles at both ends of a central crown 2a serving as a top. . The non-metallic needle 2 is mounted with the crown 2a oriented in the left-right direction Y with respect to the stapler 1, and the pair of left and right needle legs 2b, 2c is bent downward inside the stapler 1. Become. The nonmetallic needle 2 has a required length in the front-rear direction X (the width of the nonmetallic needle 2 or the length of the nonmetallic needle 2 in the short direction).

  Then, as shown in FIG. 3, a pair of left and right needle legs 2b, 2c are inserted into the through hole p1 of the paper P, and the needle legs 2b, 2c protruding to the back side of the paper P are moved along the back surface of the paper P. By folding inward in this order, a plurality of sheets of paper P can be overlapped and bound. The length of the pair of left and right needle legs 2b, 2c is set longer than the crown 2a so that the inwardly folded needle legs 2b, 2c overlap.

  At this time, when the needle legs 2b, 2c are folded inward along the back surface of the sheet P, the needle legs 2b that have been folded inward first are provided on the inner surface (or the back surface) of the needle leg 2c that is folded inward later. Is provided with an adhesive portion 2d for allowing the adhesive to be fixed to the outer surface (or surface) of the device. On the other hand, at least the outer surface (or the surface) of the needle leg 2c of the non-metallic needle 2 that is folded inward later is adhered (when the non-metallic needle 2 is wound in a roll shape or stacked up and down). Non-adhesive processing is performed to prevent adhesion by the portion 2d.

  Then, as shown in FIG. 4, the non-metallic needles 2 are connected to each other in a flatly extended state to form a belt-shaped connecting needle 3 (or a soft connecting needle) so that continuous operation is possible. . Then, as shown in FIG. 5, by winding this band-shaped connecting needle 3 in a roll shape, the connecting needle 3 can be lengthened, and can be housed inside the stapler 1 to be used compactly. (Roll-shaped connecting needle).

  As shown in FIG. 4, the connecting needle 3 is formed by connecting a plurality of elongated non-metallic needles 2 extending straight in the left-right direction Y in the front-rear direction X by partially connecting them with the connecting portion 3 a. Things. The connecting portions 3a are provided at two positions near both ends in the left-right direction Y, and the connecting needles 3 penetrate the paper P at (outside and forward edge portions of) the outer portions of the right and left connecting portions 3a. A tapered slit portion 3b for forming a tapered shape is provided so as to easily pass through the hole p1. Further, a portion inside the left and right connecting portions 3a is a continuous slit portion 3c that separates a rear edge portion and a front edge portion of the non-metallic needle 2 adjacent to the front and rear.

  A pair of left and right holes 4 for operating the connecting needle 3 is provided at the boundary between each connecting portion 3a and the slit 3c inside the connecting portion 3a. The hole 4 is used as a locking hole for operating the connecting needle 3, a feed hole, a positioning hole, or the like. The hole 4 may be a round hole, a square hole, an elongated hole, or the like. In this case, it has a rounded square shape.

  However, the positions and the numbers of the connecting portions 3a and the holes 4 are not limited to the above. For example, in FIG. 4, in addition to the pair of left and right holes 4 provided at the boundary between the front and rear non-metallic needles 2 as described above, the center of each of the non-metallic needles 2 in the front-rear direction X and the left-right direction Y The part is provided with a third hole 4. However, the third hole 4 need not be provided if it is not necessary. Further, as shown in FIG. 6, only one hole 4 may be provided at the center of each non-metallic needle 2 in the front-rear direction X and the left-right direction Y. Alternatively, three or more holes 4 may be provided in the left-right direction Y.

  The above-mentioned non-metallic needle 2 is bent downward at a position closer to the center in the left-right direction Y than the pair of left and right holes 4 in FIG. 4 so as to form a fold extending straight in the front-rear direction X. (See FIG. 2). Such a connecting needle 3 can be obtained, for example, by punching a flat sheet of uniform thickness or a sheet of synthetic resin into the above-mentioned shape.

  Next, the stapler 1 will be described.

  Returning to FIG. 1, the above-described stapler 1 includes a stapler main body 5 that can be placed on a table, and an operation handle 6 that is attached to the stapler main body 5 so as to be able to be pushed down.

  On the front side of the stapler main body 5, there is provided a sheet table 7 for setting a sheet P (see FIGS. 7 and 8), and in the back of the sheet table 7, a sheet insertion position for binding the sheet P is provided. A section 8 (a binding section) is provided. The sheet table 7 and the sheet insertion section 8 are provided substantially horizontally, and the upper part of the sheet table 7 is cut so that the front side of the stapler main body 5 has an inclined shape that is substantially downwardly lowered toward the sheet insertion section 8. Due to the chipping, a sheet table 7 and a sheet insertion section 8 are provided on the front side of the stapler main body 5 so as to have a substantially horizontal Y-shape as a whole.

  As shown in FIG. 7, a parallel binding guide portion 7a for binding the paper P in parallel with the side of the paper P is provided at the back of the paper insertion portion 8, and as shown in FIG. And a corner binding guide portion 7b for binding a corner of the sheet P obliquely. Further, the paper table 7 is provided with a mark portion 7c which serves as a guide for aligning the two sides constituting the corner of the paper P when the corner of the paper P is set on the corner binding guide portion 7b. I have.

  The stapler body 5 has a body cover 9 (hereinafter, also referred to as FIG. 1) serving as an exterior. When the body cover 9 is removed, as shown in FIG. The internal structure of the main body 5 is exposed. The operation handle 6 includes a handle operation portion 11 made of resin and a handle body portion 12 made of metal. In the portion where the main body cover 9 and the handle main body 12 intersect each other, convex portions 9a and 12a (see FIG. 11) for preventing the object from being pinched or the like can be provided. The convex portions 9a and 12a are curved rearward with respect to at least one of the rear edge of the main body cover 9 and the rear edge of the handle main body 12 corresponding to the movable range of the handle main body 12. It is shaped so as to protrude.

  The resin-made handle operation unit 11 extends obliquely upward and rearward from a position on the front end side of the portion (upper overhanging portion) of the front portion of the stapler body 5 that overhangs the paper insertion portion 8 above the paper table 7 (upper overhanging portion). It is assumed.

  The metal handle main body 12 has a substantially triangular shape in a side view, and a corner located on the front side and the lower side can be turned up and down via a support shaft 13 extending in the left-right direction Y. It is pivoted on. On the other hand, a shaft hole 14 that supports the support shaft 13 is provided in the (overhanging portion of) the stapler body 5. A corner portion located on the upper side of the metal handle main body portion 12 having a substantially triangular shape in side view is attached to an intermediate portion in the front-rear direction X of the resin handle operation portion 11.

  By the vertical rotation of the metal handle main body 12 about the support shaft 13, the resin handle operation section 11 is moved from the standby state in which the handle operation section 11 is inclined upward and rearward from the upper protrusion of the stapler body 5. Is tilted up and down so as to be in a substantially horizontal pushing state. As a result, the operation handle 6 is pushed in substantially downward from above. At this time, as shown in FIG. 1A, a gap S is provided between the handle operating unit 11 and the stapler body 5 in a horizontal state so as to prevent the object from being pinched. ing.

  A link shaft 15 extending in the left-right direction Y is provided at a rearward position along a lower side portion of the metal handle main body 12 having a substantially triangular shape in side view by rotation of the operation handle 6. It is attached to (or inserted into) the stapler main body 5 so as to be able to move up and down. The operation of the operation handle 6 is transmitted to each mechanism of the stapler 1 by raising and lowering the link shaft 15.

  In order to raise and lower the link shaft 15 in the vertical direction Z, a guide groove 17 extending in the vertical direction Z is provided on a side surface 16 (side wall) of the stapler body 5. In order to allow the link shaft 15 to move up and down in the vertical direction Z, the shaft hole 14 that supports the support shaft 13 is an elongated hole, and the support shaft 13 is a movable fulcrum. I have. By using the support shaft 13 as a movable fulcrum, the operation force of the operation handle 6 can be reduced.

  For example, the shaft hole 14 is a bent hole having a horizontal portion on the front side and an inclined portion rising rearward on the rear side. Thus, when the handle operation unit 11 is lifted up, the support shaft 13 is located at the upper end of the inclined portion of the shaft hole 14, and when the handle operation unit 11 is pushed into the horizontal state from this state, The support shaft 13 moves down the inclined portion of the shaft hole 14 to the front end of the horizontal portion. Then, the pushing force in the initial stage of pushing down can be reduced by moving the supporting shaft 13 so as to go down the inclined portion of the shaft hole 14 in accordance with the pushing down of the handle operation unit 11, that is, by moving the fulcrum. In addition, when the handle operation unit 11 approaches the lower limit position, a large operating force can be generated by the support shaft 13 entering the horizontal portion of the shaft hole 14, that is, by fixing the position of the support point. it can.

  For example, the link shaft 15 is used to move a metal link 18 interposed between the side surface 16 of the stapler main body 5 and the metal handle main body 12. The function of the link 18 will be described later.

  The link 18 has its upper portion sandwiched between the side surface 16 of the stapler main body 5 and the metal handle main body portion 12, and extends in a direction along the side surface 16 of the stapler main body 5 (for example, the front-rear direction X and the up-down direction). (Direction Z, etc.). The link 18 has its lower portion locked and held by a hook-shaped link holding portion 19 provided on the side surface 16 of the stapler body 5 so as to be movable in the direction along the side surface 16 of the stapler body 5.

  The link 18 includes an upper extending portion 18a located on the upper side and extending substantially in the vertical direction Z, an intermediate rear extending portion 18b extending rearward from a lower end portion of the upper extending portion 18a, and a rear extending portion 18b. And has a lower downward extending portion 18c extending downward from the rear end portion.

  A first guide groove 21 extending substantially in the up-down direction Z and guided by raising and lowering the link shaft 15 is provided in the upper extending portion 18 a above the link 18.

  A guide hole 22 that guides the movement of the link 18 itself is provided in the middle rearward extending portion 18 b of the link 18, and a guide hole 22 that fits into the guide hole 22 is provided in the side surface 16 of the stapler body 5. The protrusion 23 is provided in a protruding manner. The guide projection 23 has a substantially square shape in a side view.

  At the rear of the side surface 16 of the stapler body 5, a restricting projection 24 that protrudes from the rear edge of the link 18 to restrict the backward movement of the link 18 is provided in a protruding manner. The restricting projection 24 has a rectangular shape in a side view.

  The link 18 controls the movement of two axes 25 and 26, which will be described later, according to the movement. The two shafts 25 and 26 are respectively provided with a second guide groove 27 and a third guide groove 28 provided in a middle rear extension 18 b of the link 18 and a lower extension 18 c below the link 18. Is to be guided by. The guide hole 22 of the rear extending portion 18b of the link 18 and the second guide groove 27 are connected, but not limited to this.

  Further, the link 18 is provided with a pushing projection 30 that projects into the second guide groove 27 and pushes one shaft 25 backward or the like in conjunction with the descending operation and the rotating operation of the link 18. ing.

  Then, as shown in a perspective view of FIG. 10 showing a cross section of the stapler 1 cut vertically at the center of the width, a rear portion of the stapler body 5 has a housing portion 31 for directly housing the roll-shaped connecting needle 3, A transport path 32 is provided for guiding the leading end of the connecting needle 3 pulled out from the roll-shaped portion. A staple cover 33 that covers the storage unit 31 and the transport path 32 is detachably mounted on the upper side of the storage unit 31 and the transport path 32.

  Then, below the transport path 32, the distal end of the connecting needle 3 pulled out from the roll-shaped connecting needle 3 housed in the housing section 31 can be transported forward (in the transport direction) along the transport path 32. A transport mechanism 34 is provided.

  In addition, a cutting mechanism having both functions of a cutting mechanism for cutting the non-metallic needle 2 positioned at the head of the connecting needle 3 and a forming mechanism for forming the cut non-metallic needle 2 into a U-shape is provided on the front side of the transport path 32. A forming mechanism 35 and a penetrating mechanism 37 that raises and lowers a pair of left and right punching blades 36 capable of holding the non-metallic needle 2 formed in the U-shape by the cutting and forming mechanism 35 to form a through hole p1 in the paper P. is set up.

  In addition, the transport mechanism 34 is configured to feed the connecting needle 3 forward one non-metallic needle 2. Further, the cutting and forming mechanism 35 and the penetrating mechanism 37 are each configured to fit within substantially the same dimension as the dimension of the single non-metallic needle 2 in the front-rear direction X.

  The cutting mechanism and the forming mechanism can have different configurations. In addition, the cutting and forming mechanism 35 and the penetrating mechanism 37 can be integrated with each other as described later. The punching blade 36 is made of metal extending substantially in the vertical direction Z. The punching blade 36 has a width substantially equal to the width (length in the short direction) of the non-metallic needle 2, and its surface is in the same direction as the needle legs 2 b and 2 c of the non-metallic needle 2 (that is, left and right). (Direction substantially perpendicular to the direction Y). The penetration mechanism 37 is provided at the position of the sheet insertion unit 8.

  Under the sheet insertion portion 8, the needle legs 2b and 2c of the non-metallic needle 2 that are inserted into the through hole p1 together with the punching blade 36 and protrude to the back side of the sheet P along the back side of the sheet P. A bending mechanism 38 is provided to bend inward and to attach the left and right needle legs 2b and 2c to each other. The two shafts 25 and 26 drive the transport mechanism 34 and the bending mechanism 38, respectively.

  Further, an opening 41 is provided on the lower surface of the stapler main body 5, and the opening 41 is centered on a hinge 42 provided on the rear side when the non-metallic needle 2 is clogged or the like. A lid 43 that can be opened and closed so as to be pivotable downward and backward is attached. On the front side of the lid 43, a lock 44 for holding the lid 43 in a closed state is provided. In addition, a part of the above-described bending mechanism 38 may be separately attached to the inner surface side of the lid 43.

  In the stapler 1 using the non-metallic needle 2, the penetrating mechanism 37 moves through the link shaft 15 by pushing down the operation handle 6, and furthermore, the stapler 1 and the transport mechanism 34 move through the link 18. , The bending mechanism 38 moves in conjunction with the penetration mechanism 37.

  At this time, as shown in FIG. 11, the stapler 1 performs a return operation and the like by four springs.

  The first is a handle return spring 45 that returns the operation handle 6 (returns to the upper standby position). The second is a crown pressing spring that presses the crown 2a of the nonmetallic needle 2 when binding the paper P. The third is a pusher return spring 47 provided on the transport mechanism 34, and the fourth is a slider return spring 48 provided on the bending mechanism 38.

  The first handle return spring 45 has a coil portion 45a externally fitted to the support shaft 13, one arm portion 45b is locked to the stapler body 5, and the other arm portion 45c is made of metal. The torsion coil spring is locked to the handle body 12 of the first embodiment. The handle return spring 45 urges the handle body 12 made of metal in a direction to rotate upward.

  The second crown pressing spring 46 is for adjusting the state of the penetrating mechanism 37 and the like in accordance with the thickness of the paper P to be bound, and is a coil spring extending in the up-down direction Z. The third pusher return spring 47 and the fourth slider return spring 48 are coil springs extending in the front-rear direction X, respectively.

  The above is the overall configuration of the stapler.

  <Configuration of each part of stapler 1>

  Next, the features of each part of the stapler 1 of this embodiment will be described in order.

  [About operation handle 6]

(Structure 1) In the stapler 1 of this embodiment, a sheet placement section (sheet table 7) on which a sheet P can be placed is provided at one end (the front end side in this embodiment). A penetrating mechanism 37 for forming a through hole p1 in the sheet P placed on the table 7) and penetrating the non-metallic needle 2 supplied from the other end (the rear end in this embodiment) into the through hole p1. A stapler body 5 having
An operation handle 6 having a handle operation unit 11 which is connected to the one end side of the stapler body 5 and which can be pushed.
The penetrating mechanism 37 forms a through hole p <b> 1 in the paper P placed on the paper placing portion (the paper table 7) in conjunction with the pushing operation of the operation handle 6, and penetrates the non-metallic needle 2. It is composed of
The handle operating section 11 is formed to extend from the one end side of the stapler body 5 to the other end side.

  (Operation and Effect 1) As described above, the handle operation portion 11 of the operation handle 6 extends from the front end side (one end side) of the stapler body 5 toward the rear end side (the other end side). Thereby, the stapler body 5 can receive the reaction force when the operation handle 6 is pushed (downward) at the other end (rear part) of the stapler body 5.

  (Structure 2) On the other end side of the stapler main body 5, a housing portion 31 for housing the non-metallic needle 2 is provided.

  (Function and Effect 2) A structure for supplying the non-metallic needle 2 (for example, the storage section 31 or the transport path 32) is provided at the rear portion of the stapler main body 5. Thus, the receiving portion for receiving the reaction force when the operation handle 6 is pushed down (downward) can be secured by the housing portion 31 or the like. Therefore, the reaction force can be stably received without changing the rear portion of the stapler body 5 (in order to receive the reaction force) without increasing the rear portion, and the stapler body 5 can be reduced in size accordingly. Can be realized.

  On the other hand, for example, when the operation handle 6 extends from the rear end side (the other end side) of the stapler main body 5 toward the front end side (the one end side), in order to prevent the stapler main body 5 from tipping over. A portion (for example, a V-shaped support leg portion) for receiving a reaction force when the operation handle 6 is pushed (downward) is extended toward the front side of the stapler main body 5 toward the front side. And the stapler body 5 becomes large. Therefore, extending the operation handle 6 from the front end side (one end side) of the stapler main body 5 toward the rear end side (the other end side) is structurally advantageous in reducing the size of the stapler main body 5. .

  (Structure 3) The operation handle 6 is connected to the stapler body 5 at a position (up and down) facing the sheet placement section (sheet table 7).

  (Function and Effect 3) By arranging the operation handle 6 at a position overlapping with the sheet placement portion (sheet table 7) of the stapler body 5, the operation handle 6 can be compactly installed with respect to the stapler body 5. Can be.

(Configuration 4) The operation handle 6 is rotatably attached to the stapler body 5.
The handle operating section 11 is configured to rotate about a support shaft 13 provided on the stapler main body 5 when pushed in.

  (Effect 4) By pivotally attaching the operation handle 6 to the stapler body 5, the principle of leverage can be utilized, and a large output can be obtained with a small input. Thereby, the stapler 1 can be easily operated.

  (Structure 5) The handle operation section 11 extends inclining from the one end side of the stapler body 5 to the other end side in a rising gradient (backward rising in this embodiment), and the handle operation section 11 is pushed in. When operated, the other end side is configured to move up and down (in this embodiment, the rear end part descends and rises) around the support shaft 13 provided on the stapler body 5.

  (Effect 5) With the above configuration, as the operation handle 6 is pushed downward, the length in the front-rear direction X from the support shaft 13 to the link shaft 15 (operating point) (for operating the penetration mechanism 37), Since the length in the front-rear direction X from the shaft 13 to the end (power point) of the operation handle 6 on the opposite side to the support shaft 13 increases, a larger output is obtained around the lower limit position of the operation handle 6. Will be able to

  (Structure 6) The support shaft 13 that supports the end (the front end in this embodiment) of the operation handle 6 located at one end of the stapler main body 5 with respect to the stapler main body 5 is provided by the penetrating mechanism 37. Is also provided on one end side (the front side in this embodiment).

  (Function and Effect 6) As described above, the support shaft 13 that supports the front end of the operation handle 6 with respect to the stapler body 5 is provided at a position on the front side of the penetration mechanism 37. Thereby, the length from the support shaft 13 to the link shaft 15 (operating point) (for operating the penetration mechanism 37) and the length from the support shaft 13 to the end (power point) of the operation handle 6 in the opposite direction to the support shaft 13 , The leverage can be made large, and a larger output can be obtained with a smaller input.

(Configuration 7) A non-slip member 10 is provided at the lower end on the other end side (lower end on the rear end side in this embodiment) of the stapler body 5.
The end (the rear end in this embodiment) of the operation handle 6 located on the other end side of the stapler body 5 when the operation handle 6 is lowered is lower than the non-slip member 10. The length does not protrude toward the other end (the rear end in this embodiment).

  (Function and Effect 7) By providing the non-slip member 10 at the lower rear end (bottom) of the stapler main body 5, the stapler main body 5 is prevented from moving backward when the operation handle 6 is lowered. Can be. The non-slip member 10 can also be provided at a lower portion (bottom portion) of the stapler body 5 on the front end side. As the non-slip member 10, a material having a high frictional resistance such as rubber, elastomer, or cork can be used. The rear end of the operation handle 6 when the operation handle 6 is tilted downward does not protrude rearward from the anti-slip member 10 or does not protrude. Thereby, the stapler main body 5 can be stabilized when the operation handle 6 is pushed downward.

[About the transport path 32]
As shown in FIG. 12 (also see FIG. 13), the above-described transport path 32 is provided at the rear of the stapler main body 5, and is configured by a transport path constituent member 51 as shown in FIG. . The transport path constituent member 51 is mainly constituted by a transport path 32 having a substantially horizontal surface. At the front end of the transport path 32, a vertical wall portion 52 rising upward is provided. Side walls 53 are provided on both sides to rise upward.

  At the lower edge of the above-mentioned vertical wall portion 52 of the transport path component member 51 (the boundary portion with the front edge of the transport path 32), a needle passage hole 54 for passing the distal end of the connecting needle 3 is provided. Is provided. The needle passage opening 54 has a width that is substantially the same as or slightly larger than the width of the connecting needle 3 and a vertically long slit having a height approximately equal to or slightly higher than the thickness of the connecting needle 3. It is assumed to be.

  Above the needle opening 54, a first recess 55 having a smaller width and a higher height than the needle opening 54, and a second recess 56 having a smaller width and a higher height than the first recess 55. And are provided integrally. The first concave portion 55 has a width substantially equal to or larger than the interval between the pair of left and right holes 4 of the nonmetallic needle 2 or the connecting needle 3. The second recess 56 has a width dimension substantially equal to or larger than the width of the crown 2a of the non-metallic needle 2.

  A pair of left and right slit portions 57 extending in the front-rear direction is provided at a position corresponding to the pair of left and right holes 4 of the nonmetallic needle 2 or the connecting needle 3 on the front side of the transport path 32.

  Further, at a position between the pair of left and right slit portions 57 on the front side of the transport path 32, a receiving stand 58 extending forward in a state flush with the transport path 32 is provided. The pedestal 58 has substantially the same width dimension as the crown 2a, and is inserted into the above-described cutting and forming mechanism 35 so that the cutting and forming mechanism 35 can form the non-metallic needle 2 into a U-shape. , And supports the crown 2a of the non-metallic needle 2 from below. The receiving table 58 has an inverted trapezoidal shape when viewed from the front.

[About the transport mechanism 34]
As shown in FIGS. 15 and 16, the above-described transport mechanism 34 is provided below the transport path 32, and the transport mechanism 34 is mainly configured by a pusher 61 as shown in FIG. .

  The pusher 61 has a pair of left and right feed claws 62 extending substantially forward on both sides. As shown in FIGS. 18 and 19, the feed claw 62 is passed through the hole 4 (feed hole) of the non-metallic needle 2 or the connecting needle 3 from below to feed the connecting needle 3 forward. is there. The feed claw 62 is elastically deformable in the vertical direction Z. In order to increase the elastic deformation capability of the feed claw 62 in the up-down direction Z, the feed claw 62 is configured such that its base portion once rises upward and then extends forward. In addition, the first concave portion 55 in the needle passage port 54 of (the vertical wall portion 52 of) the transport path constituting member 51 in FIG. 14 has a height for avoiding interference with the tip portion of the feed claw 62. I have.

  The pusher 61 has a pair of left and right punches of the penetrating mechanism 37 on its front surface, as shown in FIG. 20 to FIG. A pressing surface 63 (see FIG. 18) for feeding between the blades 36 is provided. The pressing surface 63 enters and exits a lower side of a receiving base 58 protruding from the front of the transport path 32 to the front side. It has a concave shape that is cut into an inverted trapezoidal shape when viewed (see FIG. 26).

  The pusher 61 is installed so as to be movable in the front-rear direction X with respect to the stapler body 5 and is always operated by the pusher return spring 47 interposed between the rear portion of the pusher 61 and the stapler body 5. It is biased forward.

  At the lower part of the pusher 61, one of the two shafts 25 and 26 (the pusher drive shaft (the shaft 25), see FIG. 9) has a shaft hole 64 through which it is disposed in the left-right direction Y. The pusher drive shaft (shaft 25) is guided by the second guide groove 27 provided on the link 18 so that the pusher drive shaft (axis 25) is moved in the front-rear direction X against the elastic force of the pusher return spring 47. Has become.

  Further, a pair of guide arms 65 extending in the left-right direction Y are provided integrally on both sides of the pusher 61. The guide arm 65 is elastically deformable in the vertical direction Z. The guide arm 65 is adapted to move along a guide portion 66 (see FIG. 42B) provided at a rear portion of the stapler main body 5 (a position around the second guide groove portion 27).

  The guide portion 66 is provided with a locking small convex portion 67 projecting upward, and when the operation handle 6 is pressed down, the guide arm 65 is locked to the rear portion of the small locking convex portion 67. Thus, the pusher 61 is locked in a state of being retracted against the urging force of the pusher return spring 47. The small locking protrusion 67 has a rearwardly inclined surface 67a on the front side and a locking surface 67b extending in the vertical direction Z on the rear side.

  Then, as will be described later, when the operation handle 6 returns, the link 18 rises, so that the guide arm 65 is lifted at the lower edge of the second guide groove 27 and the guide arm 65 of the pusher 61 is locked. The lock is released by being disengaged from the locking surface 67b of the small convex portion 67, and the pusher 61 is moved forward by the urging force of the pusher return spring 47.

  At this time, the pusher 61 is moved in the front-rear direction X by a distance corresponding to one non-metallic needle 2. Then, as shown in FIG. 15, when the first (leading) non-metallic needle 2 from the front of the connecting needle 3 is mounted in the cutting and forming mechanism 35, when the pusher 61 advances, the feed pawl 62 becomes When the pusher 61 retreats, the feed pawl 62 moves to the second hole 4 from the front of the connecting needle 3 when the pusher 61 retreats. Thereby, it is possible to send the last one non-metallic needle 2 to the cutting and forming mechanism 35. After the last non-metallic needle 2 is formed into a U-shape by the cutting and forming mechanism 35, the pair of left and right punching blades 36 of the penetrating mechanism 37 are not formed by the pressing surface 63 of the pusher 61 but by the feed claw 62. Is sent between Although not particularly shown, a stopper portion is provided on the front side of the penetrating mechanism 37 for restricting the non-metallic needle 2 sent by the pusher 61 from protruding forward from the penetrating mechanism 37.

[About staple cover 33]
As shown in FIGS. 23 and 24, the staple cover 33 described above is removably attached to the accommodation section 31 at the rear of the stapler main body 5 and the upper side of the transport path 32.

  On the side surface of the staple cover 33, a mounting projection 33a is provided. The mounting projection 33a is for locking and fixing the staple cover 33 to the stapler main body 5 by entering into a mounting hole 16a (see FIG. 9) provided on the side surface 16 of the stapler main body 5. . The mounting projection 33a is configured to be able to accurately position the connecting needle 3 by being aligned with the rear edge of the mounting hole 16a (back alignment). For this purpose, the mounting hole 16a has a slight clearance in the front-rear direction X with respect to the mounting projection 33a for positioning.

  The staple cover 33 is mainly made of a transparent resin having an upper surface and left and right side surfaces as shown in FIG. The staple cover 33 has a needle protection projection 71 projecting forward at the tip end side. As shown in FIG. 26, the needle protecting projection 71 is provided above the receiving base 58 so as to correspond to the receiving base 58 of the transport path 32.

  The needle protecting projection 71 has a width approximately equal to or smaller than that of the crown 2a of the nonmetallic needle 2, and is inserted into the cutting and forming mechanism 35, and is inserted into the cutting and forming mechanism 35. When the metal needle 2 is formed in a U-shape, the crown 2a of the non-metallic needle 2 is covered from above and protected. The needle protecting projection 71 is disposed in the cutting and forming mechanism 35 through the second concave portion 56 above the needle passage 54 in the vertical wall portion 52 of the transport path constituting member 51. In addition, the second concave portion 56 in the needle passage 54 of the transport path constituting member 51 has a height at which the needle protecting projection 71 can be inserted.

  Further, a narrow gap through which the non-metallic needle 2 or the connecting needle 3 passes is provided between the receiving table 58 of the transport path constituting member 51 and the needle protecting projection 71 of the staple cover 33. Upper and lower guide protrusions 71a (see FIG. 25) that can be fitted into guide grooves provided in the cutting and forming mechanism 35 are integrally provided at the tip of the needle protection protrusion 71.

  Also, as shown in FIGS. 27 and 27A (see also FIG. 30), the connection needle 3 is lightly pressed from above on the front upper portion of the staple cover 33, and is prevented from returning to the rear of the connection needle 3. For this purpose, a first check pawl 72 is provided. In this case, the first non-return claws 72 are provided as a pair of left and right so as to be inserted into the left and right holes 4 of the connecting needle 3 from above. The first non-return claw 72 is an elastic claw made of resin that is independent of the staple cover 33 and is independent of the staple cover 33, and does not apply an excessive pressing force to the upper surface of the connecting needle 3. I have. The first non-return claw 72 has a locking surface 72a on the front side extending in the vertical direction Z, and a claw portion having a forwardly inclined surface 72b on the rear side with respect to the tip of the arm extending forward. It has been.

  In addition, as shown in FIGS. 28 and 29 (see also FIG. 30), between the pair of left and right first non-return claws 72 (the position of the center of the connecting needle 3 in the left-right direction Y). A second non-return claw 73 is provided which is used to switch the first non-return claw 72 when the connection needle 3 is lightly pressed from above and the remaining of the connection needle 3 is reduced. The second check pawl 73 is arranged so as to protrude before the first check pawl 72. The second check pawl 73 is an independent resin elastic pawl integrated with the staple cover 33 and does not apply an excessive pressing force to the upper surface of the connecting needle 3. . The second non-return claw 73 has a locking surface 73a on the front side extending in the vertical direction Z, and a claw having a forwardly inclined slope 73b on the rear side with respect to the tip of the arm extending forward. It has been. In this case, the second non-return claw 73 is disposed forward of the first non-return claw 72 by one length in the front-rear direction X of the non-metallic needle 2.

  Further, as shown in FIG. 31 (see also FIG. 25), the staple cover 33 is attached to the stapler 1 (the stapler main body 5 and the main body cover 9) on both sides of the tip portion when the stapler 1 is attached to the stapler 1. A guide projection 76 is provided to be guided along the provided cover guide 75.

  The staple cover 33 is mounted so as to move from the rear side to the front side with respect to the stapler 1 (cover mounting direction), and a cover guide 75 and a guide projection 76 are provided to guide the mounting. ing. At this time, the cover guide 75 is formed in a non-linear groove shape (guide groove). That is, the lower portion 77 of the groove-shaped cover guide 75 has a substantially horizontal traversing portion 77a at a position on the near side (rear side), and has a downwardly inclined portion 77b at the far side (front side) of the traversing portion 77a. It has a substantially horizontal seating portion 77c on the inner side (front side) of the inclined portion 77b.

  The guide projection 76 has a downwardly inclined shape that matches the inclined portion 77b when the staple cover 33 is attached to the stapler 1. A substantially horizontal seating surface 76a is provided at the distal end of the guide projection 76 so as to abut (seat) in a line contact state with the seating portion 77c when the staple cover 33 is attached to the stapler 1.

  The upper portion 78 of the groove-shaped cover guide 75 has a forward tapered portion 78a on the near side (rear side), and a traversing portion 77a (lower traversing portion) on the far side of the leading tapered portion 78a. It has a parallel traversing part 78b (upper traversing part), has an inclined part 78c substantially parallel to the inclined part 77b on the back side of the traversing part 78b, and has a terminal end substantially parallel to the seating part 77c on the deep side of the inclined part 78c. It has a portion 78d.

  Then, as shown in FIG. 31 (a), between the entry side traversing portion 77a and the introduction taper portion 78a, from a wide state, the staple cover 33 can be inserted obliquely with the staple cover 33 lowered forward. The tapered groove portion gradually narrows toward the front side.

  Further, between the middle traversing portion 77a and the traversing portion 78b, the staple cover 33 is postured from the diagonally forward lowering state as shown in FIG. 31 (a) to the horizontal state as shown in FIG. 31 (b). In order to prevent the staple cover 33 from being inserted unless the staple cover 33 is lowered, the guide groove 76 has a transverse groove portion with a spacing 79a smaller than the height in the vertical direction Z when the staple cover 33 is lowered forward. The height dimension of the entry side of the cover guide 75 (the tapered groove portion thereof) is reduced so as to have this interval 79a.

  Further, as shown in FIG. 31 (b), between the inclined portion 77b and the inclined portion 78c at the back, the staple cover 33 in a substantially horizontal state is directly dropped down along the inclined portion 77b. It is a downwardly sloped groove portion having an interval 79b substantially equal to the thickness of the guide projection 76 itself.

  Finally, as shown in FIG. 31C, between the seating portion 77c on the back side and the terminal end portion 78d, the guide projection 76 can be substantially restricted in the vertical direction Z with the staple cover 33 attached. As described above, the holding groove portion has a spacing 79c substantially equal to the height dimension of the inclined guide projection 76 in the vertical direction Z when the staple cover 33 is in the horizontal state.

  As described above, when the staple cover 33 is seated so as to be dropped downward on the rear side, when the staple cover 33 is attached to the stapler 1, for example, the staple cover 33 projects from the needle protection projection 71 at the tip of the staple cover 33. The guide protrusion 71a, the locking surface 72a of the first check pawl 72, and the locking surface 73a of the second check claw 73 rub the upper surface of the connecting needle 3 forward and are connected by the guide protrusion 71a. It is possible to prevent a problem that the needle 3 is forcibly advanced forward.

[About the positioning structure of the connecting needle 3]
When cutting the connecting needle 3 into individual non-metallic needles 2 by the cutting mechanism (or the cutting and forming mechanism 35), it is necessary to determine the cutting position with high precision. Therefore, it is extremely important to accurately position the connecting needle 3.

  Therefore, for example, by using a relatively strong elastic urging means such as a metal spring or the like, the connecting needle 3 on the conveying path 32 is always pressed down from the upper side, and the connecting needle 3 is moved in the conveying direction. The distal end of the connecting needle 3 is constantly pressed against an abutting portion (for example, the punching blade 36) provided at a position deep in (the cutting mechanism of) the transport path 32 by urging the needle toward the front side. Then, it is conceivable to cause the positioning of the connecting needle 3 (adjustment beforehand).

  However, when the front end is adjusted in this manner, an excessive pressing force is required for the pressing from above by the elastic urging means in order to prevent the connecting needle 3 from moving backward when the transport mechanism 34 moving back and forth moves backward. At the same time, the continuous pressing force applied in (the front side of) the transport direction causes a problem that the connecting needle 3 (the portion pressed against the abutting portion (such as the punching blade 36)) is easily damaged. In addition, there arises a problem that the resistance when the connecting needle 3 is transported to the cutting mechanism becomes large.

  Therefore, in this embodiment, the positioning of the connecting needle 3 is performed as follows.

(Structure 1) As described above, the stapler 1 of this embodiment includes a cutting mechanism for cutting the connecting needles 3 formed by connecting a plurality of flat non-metallic needles 2 one by one; And a transport mechanism 34 for transporting the paper through the transport path 32 to the cutting mechanism.
Then, as shown in FIG. 27, a positioning section 81 for positioning at a position on the rear side in the transport direction from the tip end of the connection needle 3 in the transport direction is provided in the middle of the transport path 32.
The positioning portion 81 positions the connecting needle 3 by pressing the connecting needle 3 in a direction toward the rear side in the transport direction.

  Here, the cutting mechanism is the above-described cutting and forming mechanism 35. The transport direction is a front side in the front-rear direction X. The direction toward the rear side in the transport direction is the rear side in the front-rear direction X. The position behind the distal end of the connecting needle 3 in the transport direction is the position of the second and subsequent non-metallic needles 2 from the front of the connecting needle 3. In this case, the position of the third non-metallic needle 2 from the front of the connecting needle 3 is set. As the positioning portion 81, (the locking surface 72a of the first non-return claw 72 of the staple cover 33 described above that faces in the vertical direction Z) can be used.

  The second check pawl 73 of the staple cover 33 shown in FIG. 28 (the locking surface 73a of the staple cover 33 facing in the vertical direction Z) also serves as the positioning needle 81 when the remaining two needles are used. The second non-metallic needle 3 can be positioned. By the way, as shown in FIG. 29, when the number of the connecting needles 3 becomes one, there is no need to perform cutting, so that positioning is unnecessary.

  (Operation and Effect 1) In the above configuration, the positioning section 81 for performing positioning at a position on the rear side in the transport direction from the tip of the connecting needle 3 is provided in the middle of the transport path 32, and the transport direction to the positioning section 81 is adjusted. The positioning of the connecting needle 3 is performed by a temporary pressing (immediately before the cutting of the connecting needle 3) in a direction toward the rear side (return direction) (backward adjustment). This eliminates the need for continuous pressing from above by a relatively strong elastic biasing means such as a metal spring or the like, so that an excessive and continuous pressing force is not applied to the connecting needle 3. In addition, the connecting needle 3 is less likely to be damaged, and the resistance when the connecting needle 3 is transported to the cutting mechanism can be eliminated, so that the nonmetallic needle 2 of a softer material can be transported.

  (Configuration 2) The positioning portion 81 can be positioned by contacting the edge of the hole 4 provided in the non-metallic needle 2 or the connecting needle 3 toward the rear side in the transport direction.

  Here, the hole 4 is used as a positioning hole. The edge of the hole 4 facing rearward in the transport direction abuts on the front locking surface 72a of the positioning portion 81 (first check pawl 72) to be positioned. The positioning hole can be shared with the feed hole. However, the positioning hole and the feed hole may be provided separately for exclusive use.

  In the case of this embodiment, the first hole 4 and the second hole 4 from the front of the connecting needle 3 are used as feed holes, and the third hole 4 from the front is used as a positioning hole. The holes 4 provided at the same position in the left-right direction Y are selectively used so that the first check pawl 72 and the feed pawl 62 do not interfere with each other.

  (Function and Effect 2) With the above configuration, the positioning of the connecting needle 3 can be reliably performed with a simple configuration. Further, since the connecting needle 3 is provided with a hole 4 such as a feed hole in advance, the hole 4 can be used for positioning the connecting needle 3 as it is. In addition, about the hole part 4, you may provide the thing only for positioning separately from a feed hole.

  (Structure 3) Alternatively, the positioning portion 81 may perform positioning by contacting the ends of the both ends of the non-metallic needle 2 extending flat to the rearward side in the transport direction.

  Here, the edges of both ends of the non-metallic needle 2 facing rearward in the transport direction can be tapered slits 3b provided at the rear edges of both ends of the non-metallic needle 2 ( In this case, the hole 4 in FIG. 27 is replaced with the slit 3b). The slit portion 3b at the rear edge of the non-metallic needle 2 is positioned by being brought into contact with the front locking surface 72a of the positioning portion 81. Although the positioning portion 81 in this case is not particularly shown, for example, the first non-return claw 72 or a similar one may be provided at the position of the slit portion 3b.

  (Effect 3) With the above configuration, the positioning of the connecting needle 3 can be reliably performed with a simple configuration. At both ends of the connecting needle 3, tapered slit portions 3b for facilitating insertion of the needle legs 2b and 2c of the non-metallic needle 2 bent in a U-shape into the through hole p1 formed in the paper P are provided. Since the front and rear edges are provided in advance, the slit 3b at the rear edge of the front and rear edges can be used for positioning the connecting needle 3 as it is.

  (Configuration 4) When the connecting mechanism 3 is cut by the cutting mechanism (cutting and forming mechanism 35), the connecting mechanism 3 temporarily attaches the connecting needle 3 in a direction toward the rear side in the transfer direction of the connecting needle 3. The return portion 82 for urging the connecting needle 3 against the positioning portion 81 is provided.

  Here, the return portion 82 can be the feed claw 62 of the pusher 61 in the transport mechanism 34. The feed claw 62 has a locking surface 62a on the front side extending in the vertical direction Z and a claw having a rearwardly inclined slope 62b on the rear side with respect to the distal end of the arm extending forward.

  (Effect 4) As described above, the feed claw 62 is retracted from the state of being temporarily advanced when feeding the connecting needle 3, but at this time, the hole 4 (or the slit 3b; hereinafter, a hole). When the slope 62b is displaced rearward with respect to the section 4), the claw portion is guided downward along the slope 62b, the feed claw 62 is elastically deformed downward, and the claw at the tip is moved from the front by one. Get out of the fourth hole 4. Then, it is retracted along the back surface of the connecting needle 3 and is passed through the second hole 4. At this time, as illustrated in FIG. 42D, the guide arm 65 of the pusher 61 is locked in the retracted state (by being locked to the locking small convex portion 67 of (the guide portion 66 of) the stapler body 5). .

  When the retraction of the pusher 61 is started as described above, the rear edge of the front hole 4 is pushed backward by the locking surface 62a of the feed claw 62 until the feed claw 62 comes out of the front hole 4. For only a short time, the connecting needle 3 is urged to the extent that it is slightly retracted to the rear side. Then, by the slight movement of the connecting needle 3 at this time, the positioning needle 81 can be pressed against the positioning needle 81 to perform positioning. By this positioning, it is possible to reduce the load on the connecting needle 3 and to perform the accurate cutting of the connecting needle 3 by the cutting mechanism.

  Therefore, it is only necessary to temporarily perform positioning only at the time of cutting by the cutting mechanism, and the mechanical load required for positioning is reduced, and a preliminary operation (retreat operation) for the transport mechanism 34 to transport the connecting needle 3 is performed. Can be used to perform positioning. Since the feed claw 62 of the transport mechanism 34 can be used as it is for the return portion 82, the configuration is simple.

  (Configuration 5) When the transport mechanism 34 urges the non-metallic needle 2 or the connecting needle 3 in the direction toward the rear side in the transporting direction, the positioning unit 81 moves the non-metallic needle 2 or the connecting needle 3 in the transport direction. It has a locking surface 73a that abuts against the rearward facing edge.

  (Effect 5) As described above, since the positioning portion 81 has the above-described locking surface 73a, the transport mechanism 34 urges the nonmetallic needle 2 or the connecting needle 3 in the direction toward the rear side in the transport direction. In this case, the edge of the non-metallic needle 2 or the connecting needle 3 facing the rear side in the transport direction can be reliably brought into contact with the locking surface 73a to perform positioning.

[About the self-holding structure of the connecting needle 3]
In order to be able to accurately cut the connecting needle 3 to which the non-metallic needle 2 is connected by the cutting mechanism, it is necessary to correctly attach the connecting needle 3 to the stapler body 5. At this time, if the connecting needle 3 wound in a roll shape is used, it is difficult to correctly attach the connecting needle 3 to the stapler main body 5 due to the influence of the winding sticking on the connecting needle 3. Further, even if the connecting needle 3 is correctly mounted, the connecting needle 3 may be displaced from a correct position on the stapler main body 5 due to winding irregularity after mounting. If the connecting needle 3 is displaced from the correct position in this manner, the connecting needle 3 cannot be cut accurately by the cutting mechanism.

  Therefore, for example, it is conceivable that the connecting needle 3 is indirectly mounted on the stapler main body 5 by, for example, housing the roll-shaped connecting needle 3 in a cartridge and attaching the cartridge to the stapler 1. By using a cartridge (smaller and easier to handle than the stapler 1) as a medium in this manner, the attachment of the connecting needle 3 to the cartridge is facilitated, and the connecting needle 3 is accurately attached to the stapler body 5 via the cartridge. , And the connecting needle 3 can be hardly displaced.

  However, when a cartridge is used, the handling of the connecting needle 3 due to the attachment / detachment of the cartridge increases, and a cartridge is required or a mechanism for attaching / detaching the cartridge to / from the stapler 1 is required. Therefore, the structure of the stapler 1 becomes complicated, the number of parts increases, the size of the stapler 1 increases, and the cost also increases.

  Therefore, in this embodiment, the connecting needle 3 can be directly and accurately attached to the stapler body 5 as described below.

(Structure 1) As described above, the stapler 1 of this embodiment includes a cutting mechanism for cutting the connecting needles 3 formed by connecting a plurality of flat non-metallic needles 2 one by one; And a transport mechanism 34 for transporting the paper through the transport path 32 to the cutting mechanism.
Then, as shown in FIG. 32 (to FIG. 35), a needle holding portion 84 capable of holding the distal end portion of the connection needle 3 or its vicinity is provided on the front side in the transport direction of the transport path 32.
The needle holding portion 84 has a contact surface 85 to which the distal end edge of the connection needle 3 is abutted and an engagement portion 86 provided on the connection needle 3 as shown in FIG. An engaging member 87 that engages from one surface side is opposed to the other surface side of the connecting needle 3 with the engaging member 87 sandwiched between the engaging member 87 at different positions before and after in the transport direction. And a disengagement restricting portion 88 disposed at the bottom.
In the present embodiment, as an example, one surface side is the side of the conveying path constituent member 51 and the engaging member 87 with respect to the connecting needle 3, that is, the lower surface side of the connecting needle 3, and the other side is the conveying path For example, the staple cover 33 and the needle holding portion 84 are opposed to the component member 51, that is, the upper surface of the connecting needle 3. However, the above may be reversed.

  Here, the needle holding portions 84 are provided at the positions on both sides of the connecting needle 3, respectively, so that the connecting needle 3 can be securely held by the stapler body 5 by itself, and the stapler body 5 This is preferable for facilitating removal of the connecting needle 3. The self-holding means that the distal end of the connecting needle 3 or the vicinity thereof can be held on the stapler main body 5 only by the needle holding portion 84 without using another configuration.

  The abutting surface 85 may be any as long as the leading edge of the connecting needle 3 is lightly abutted when the leading end of the connecting needle 3 is inserted into the transport path 32. As the abutting surface 85, for example, as shown in FIGS. 34 and 35, the extraction blade 36 of the penetration mechanism 37 can be used. Further, the contact surface 85 can be provided for the transport path constituting member 51, for example, as shown in FIG. Alternatively, the contact surface 85 can be provided on the stapler body 5 as shown in FIG. 37, for example.

  The hole 4 of the connecting needle 3 and the slits 3b on both sides can be used as the engaging portion 86. The feed claw 62 of the transport mechanism 34 or the like can be used as the engagement member 87. In this case, the engaging member 87 is provided on the lower surface side of the connecting needle 3. The detachment restricting portion 88 is provided on the upper surface side of the connecting needle 3. However, the positional relationship between the engagement member 87 and the disengagement restricting portion 88 may be upside down. It is preferable that the disengagement restricting portion 88 is installed in a state where the position thereof is displaced forward and backward from the engaging member 87. The detachment restricting portion 88 will be described later.

  (Operation and Effect 1) According to the above configuration, the leading end of the roll-shaped connecting needle 3 housed in the housing portion 31 is pulled out, and the leading end of the connecting needle 3 is slid along the carrying path 32 so as to slide along the carrying path 32. The front end of the connecting needle 3 is simply inserted into the front end of the connecting needle 3 by lightly abutting the distal end edge of the connecting needle 3 against the contact surface 85. The vicinity thereof can be securely held directly on the stapler main body 5 without using an auxiliary component or the like.

  At this time, by simply inserting the distal end of the connecting needle 3 into the inside of the transport path 32 using one finger, it is possible to connect easily and securely without displacement in the transport direction (X direction) without relying on visual observation. The needle 3 can be attached. In addition, the abutment surface 85 of the needle holding portion 84 can prevent the connecting needle 3 from buckling due to excessive insertion of the connecting needle 3.

  As a result, it is possible to eliminate a mounting error such as a deviation in the transport direction due to the winding of the connecting needle 3 wound in a roll shape, thereby eliminating the trouble of redoing, and accurately mounting the connecting needle 3 to the stapler 1. For this purpose, a cartridge (for indirectly accommodating and holding the roll-shaped connecting needle 3) is provided as a separate component, a space for accommodating the cartridge in the stapler 1 is provided, and the cartridge is attached to and detached from the stapler 1. Since there is no need to provide a mechanism for making the stapler 1, the structure of the stapler 1 is greatly simplified, and the stapler 1 is reduced in size, the number of parts is reduced, and the cost is reduced. Can be achieved.

  (Configuration 2) The detachment restricting portion 88 has a first restricting portion 91 installed at the position of the non-metallic needle 2 at the head of the connecting needle 3.

  Here, the first non-metallic needle 2 of the connecting needle 3 is inserted into the cutting and forming mechanism 35, so that the first restricting portion 91 is inserted into the needle holding plate 92 of the cutting and forming mechanism 35 shown in FIG. It can be provided on the side.

  In addition, the first regulating portion 91 can be provided for the transport path constituting member 51, for example, as shown in FIG.

  (Function and Effect 2) According to the above configuration, the position of the leading non-metallic needle 2 of the connecting needle 3 can be reliably controlled and held so as not to come off by the first restricting portion 91. The first restricting portion 91 is effective in preventing the connecting needle 3 from buckling after the tip edge of the connecting needle 3 (the leading nonmetallic needle 2) hits the contact surface 85. In addition, since the first restricting portion 91 is provided, the distal end portion of the connecting needle 3 comes into contact with the contact surface 85 in a state where it is unlikely to buckle. Since it becomes larger than when it hits 85, it is possible to clearly feel that the tip of the connecting needle 3 has come off and is securely held by the restricting portion 88 by the response.

(Configuration 3) The detachment restricting portion 88 may include a second restricting portion 93 installed at the position of the second and subsequent non-metallic needles 2 of the connecting needle 3.
Then, the engaging member 87 is arranged at a position between the first restricting portion 91 and the second restricting portion 93 in the transport direction of the connecting needle 3.

  Here, the second restricting portion 93 is, for example, an upper edge portion (located on both sides of the first concave portion 55 and the second concave portion 56) of the needle passage port 54 provided in the vertical wall portion 52 of the transport path constituting member 51. It can be.

  In this case, as shown in FIG. 33, the engaging portion 86 is the first hole 4 from the front, and the engaging member 87 is the claw portion of the feeding claw 62 fitted into the first hole 4. The first restricting portion 91 is positioned slightly forward of the first hole 4, and the second restricting portion 93 is positioned slightly rearward of the first hole 4.

  In this case, as shown in FIG. 35, the first regulating portion 91 and the second regulating portion 93 are installed so as to be located outside the engaging member 87 in the left-right direction Y. Either the first restricting portion 91 or the second restricting portion 93 can be provided structurally.

  The second regulating portion 93 can be provided for the transport path constituting member 51, for example, as shown in FIG.

  (Function and Effect 3) According to the above configuration, it is possible for the second restricting portion 93 to reliably restrict the positions of the second and subsequent non-metallic needles 2 of the connecting needle 3 so as to keep the connecting needles 3 from coming off. The upper first restricting portion 91, the second restricting portion 93, and the lower engaging member 87 can hold the distal end portion of the connecting needle 3 or its vicinity in a staggered manner from above and below. As a result, a higher self-holding force can be obtained, so that the attached connecting needle 3 can be hardly removed from the transport path 32. The second restricting portion 93 is effective for preventing the connection needle 3 having the winding groove from being displaced by the winding groove.

(Structure 4) As shown in FIG. 33, the disengagement restricting portion 88 is spaced apart from the other surface of the connecting needle 3 with gaps 95 and 96.
Then, the distal end of the engaging member 87 is made to protrude to the other surface side of the connecting needle 3 through the engaging portion 86 and larger than the gaps 95 and 96 (projection amount 97> gap 95, 96).

  (Function and Effect 4) The detachment restricting portion 88 is spaced apart from the other surface of the connecting needle 3 with gaps 95 and 96. This prevents the detachment restricting portion 88 from directly contacting the connection needle 3 with respect to the connection needle 3 having no winding, so that the distal end of the connection needle 3 or its vicinity is regulated so as not to come off. It is possible to hold. In addition, with respect to the connection needle 3 having the winding groove, the detachment restricting portion 88 directly and lightly contacts the connection needle 3, so that the distal end of the connection needle 3 can be held.

  As a result, the connection needle 3 can be prevented from being damaged, and the transport resistance to the connection needle 3 can be reduced.

  Further, the distal end of the engaging member 87 is made to protrude through the engaging portion 86 to the other surface of the connecting needle 3 so as to be larger than the gaps 95 and 96 described above. This makes it difficult for the distal end of the connecting needle 3 to pass over the engaging member 87 through the narrow gaps 95 and 96 between the disengagement restricting portion 88 and the other surface of the connecting needle 3. It is possible to more reliably regulate and hold the connecting needle 3 so as not to come off, and it is possible to effectively prevent the connecting needle 3 from coming off the transport path 32.

  The feed claw 62 serving as the engaging portion 86 has a downwardly inclined surface 62b behind the claw portion at the tip and a locking surface 62a in the vertical direction Z on the front side. When the distal end of the connecting needle 3 is inserted, it is easy to get over the inclined surface 62b, and when it is pulled back, it is difficult to get over the locking surface 62a.

  However, when the connecting needle 3 is to be removed, as shown in FIG. 38, a required force (greater than the force applied to the connecting needle 3 when the connecting needle 3 naturally comes off the transport path 32 due to the winding) is required. To pull the connecting needle 3 later. Then, the needle holding portions 84 are provided at the positions on both sides of the connecting needle 3, and the first concave portions 55 are provided in the middle portions of the left and right second regulating portions 93 (the needle passage openings 54) of the needle holding portions 84. And the second concave portion 56, the connecting needle 3 can be bent in an out-of-plane direction (upward) in a state of a middle height. Can be removed.

  Hereinafter, the main part of the stapler 1 will be described with reference to FIGS.

  [About the cutting and forming mechanism 35]

  As shown in FIG. 39, the above-described cutting and forming mechanism 35 includes a pair of left and right cutting blades 101 (cutting mechanism) for cutting the nonmetallic needle 2 one by one from the connecting needle 3 and the nonmetallic needle 2 in a flat state. A pair of left and right forming members 102 (forming mechanism) for forming a U-shape and needles 2b and 2c of the non-metallic needle 2 formed in a U-shape to maintain the U-shaped forming state. A pressing plate 92 (needle pressing mechanism) is provided. Also, the receiving table 58 (see FIG. 38) of the transport path component member 51 also functions as a support portion (fixing portion) for supporting the non-metallic needle 2 during molding, and becomes one of the components of the cutting and forming mechanism 35. ing. Note that the supporting portion is not limited to the configuration like the pedestal 58 as long as the nonmetallic needle 2 can be supported so as not to move during molding.

  The cutting blade 101 and the forming member 102 are provided integrally with the driver main body 100 constituting the penetration mechanism 37. The driver main body 100 and the needle holding plate 92 can move relatively in the up-down direction Z with respect to the receiving table 58. In the present embodiment, the receiving base 58 is fixed so as not to move in the vertical direction Z, and the driver main body 100 and the needle pressing plate 92 are configured to move in the vertical direction Z. However, the present invention is not limited thereto. Alternatively, the receiving base 58 may move in the vertical direction Z with respect to the driver body 100 and the needle holding plate 92. Further, the cutting blade 101 and the forming member 102 are accommodated in the needle holding plate 92, and can relatively move in the needle holding plate 92 in the vertical direction Z. In this embodiment, the molding member 102 is provided integrally with the driver main body 100 (penetration mechanism 37), but the present invention is not limited to this. The molding member 102 may be provided separately from the driver main body 100 as long as the molding operation can be performed in synchronization with the penetration operation of the penetration mechanism 37.

  The driver main body 100 has a shaft hole 100a extending in the left-right direction Y, and the link shaft 15 described above is disposed through the shaft hole 100a. The link shaft 15 is inserted and arranged in the first guide groove portion 21 of the link 18 (see FIG. 9) and the guide groove 17 extending in the vertical direction Z provided on the side surface 16 (side wall) of the stapler body 5. I have. When the link shaft 15 is guided along the guide groove 17, the driver main body 100 moves in the vertical direction Z.

  The cutting blade 101 is an example of a cutting blade that cuts the connecting portion 3a of the connecting needle 3, and an inclined blade portion 101a is provided at a lower end. Each of the cutting blades 101 is attached to a pair of attachment portions 103 projecting from the rear side (rear) of the driver main body 100 in a state where the inclined blade portions 101a are directed outward.

  Each cutting blade 101 is inserted into the hole 4 whose inner surface near the edge of the cutting blade 101a is inclined inward so that the connecting portion 3a can be cut smoothly. The blades 101a are attached to the mounting portion 103 in such an arrangement that the length of each blade 101a is longer than the length of the connecting portion 3a. In addition, each cutting blade 101 is provided with a notch 101b by notching the outside of the blade 101a, so that the cutting blade 101 moves in the vertical direction Z relative to the needle holding plate 92. 101a does not contact the component parts of the needle holding plate 92.

  Each forming member 102 is provided at a position inside each cutting blade 101, and is formed with an arm 102a extending downward from a wall surface of each mounting portion 103 and protruding inward from a tip (lower end) of the arm 102a. And a projected portion 102b. The arm portion 102a has a free end at the distal end, and is elastically deformable in the left-right direction Y with a base end (fixed end) fixed to the mounting portion 103 as a base point.

  In order to bend the needle legs 2b and 2c of the non-metallic needle 2 placed on the cradle 58, each arm portion 102a has at least a needle leg formed from the upper end to the base end of the projection 102b. The height is equal to or longer than the length (height) of 2b, 2c. The length (depth) of the arm portion 102a in the front-rear direction X is equal to or longer than the length of the non-metallic needle 2 in the lateral direction.

  Also, the width of the pedestal 58 is formed to be substantially the same as the inner width of the crown 2a so that the needle legs 2b and 2c can be held between the pedestal 58 and the inner wall surface of each arm portion 102a. The interval between the pair of arm portions 102a is formed to have substantially the same size as the outer width of the crown 2a. The interval between the pair of protrusions 102 b is formed to be slightly smaller than the outer width of the receiving table 58. With this configuration, when the protruding portion 102b descends, the protruding portion 102b abuts on the pedestal 58 and is elastically deformed outward, while pressing the needle legs 2b and 2c between the pedestal 58 and the pedestal 58 while pressing down. Therefore, the non-metallic needle 2 can be reliably bent in a U-shape, and the molding operation can be stably performed. Further, after bending, the pair of needle legs 2b and 2c can be held by the outer surface of the cradle 58 and the inner surfaces of the pair of arm portions 102a to maintain the molded state.

  The needle holding plate 92 is formed in a rectangular frame shape, and a pair of regulating protrusions 104 for guiding the movement of the needle holding plate 92 in the up-down direction Z and regulating the movement amount are provided on the outer surface thereof. The pair of regulating protrusions 104 are inserted into a pair of regulating grooves 29 provided on the side surface 16 (side wall) of the stapler main body 5 and adjacent to the guide groove 17 (see FIG. 42A and the like). When the regulating protrusion 104 is guided along the regulating groove 29, the needle pressing plate 92 moves in the up-down direction Z. The restriction groove 29 is a long hole extending in the vertical direction Z. Therefore, when the regulating protrusion 104 abuts on the upper end of the regulating groove 29, the lifting of the needle holding plate 92 is stopped. This stop position is the uppermost point of the needle holding plate 92. Further, when the regulating protrusion 104 abuts on the lower end of the regulating groove 29, the lowering of the needle holding plate 92 is stopped. This stop position is the lowest point of the needle holding plate 92. Further, since the regulating protrusion 104 is formed in an elliptical shape elongated in the up-down direction Z, the inclination in the front-rear direction X is suppressed, and the regulating protrusion 104 can smoothly move in the up-down direction Z without wobbling or the like. I have.

  A pair of first restricting portions 91 for restricting the position of the tip of the non-metallic needle 2 in the vertical direction Z are provided on the inner side surface of the needle pressing plate 92. Below the first restricting portion 91, there is provided a pair of needle leg pressing portions 105 for suppressing the opening of the pair of needle legs 2b and 2c of the formed non-metallic needle 2 and maintaining the formed state. I have. The needle holder 105 suppresses the opening of the needle tip by guiding the needle tip inward by the tapered surface 105a protruding inward. The pair of needle holding portions 105 are formed to have a length that can maintain an insertion interval for inserting the pair of needle legs 2b and 2c formed in a U-shape. Further, when the needle holding plate 92 is lowered to reach the lowest point, the upper end of the needle holding portion 105 is formed with the needle legs 2b, 2b of the formed non-metallic needle 2. It is formed at a height that does not interfere with the tip of 2c. That is, the needle holding portion 105 is configured to retreat to a position where it does not come into contact with the bent needle legs 2b and 2c when the non-metallic needle 2 is formed in a U-shape while the forming member 102 moves downward. ing.

  On the other hand, when the needle holding plate 92 is raised together with the molding member 102 after the molding is completed, the needle leg is held at the tip of the needle holding portion 105 while the arm portion 102a holds (part of) the needle legs 2b and 2c. The dimensions are adjusted so that 2b and 2c can be picked up and held. Therefore, the opening (opening) of the needle legs 2b, 2c when the needle legs 2b, 2c are transferred from the arm portion 102a to the needle holding portion 105 can be suppressed, and the transfer (needle pick-up) can be performed stably.

  In addition, a pair of elastic pieces 106 (engaging portions) that abut against the shoulder 103a of the mounting portion 103 provided on the driver main body 100 are provided at substantially the center of the inner surface of the needle holding plate 92 in the vertical direction Z. . Each elastic piece 106 is formed of a downwardly extending cantilever, has a free end at the tip, and is elastically deformed in the left-right direction Y with the fixed end as a base point. At the tip of each elastic piece 106, a protrusion 106a is formed which protrudes inward. With this configuration, when the driver main body 100 rises with respect to the needle holding plate 92, the lower end of the elastic piece 106 abuts and engages with the shoulder 103a, and the needle holding plate 92 moves up together with the driver main body 100. ing. When the needle holding plate 92 rises to the uppermost point, the shoulder 103a pushes the elastic piece 106 outward and disengages from each other by climbing over the elastic piece 106, so that only the driver main body 100 rises. I have.

  When the driver main body 100 descends with respect to the needle holding plate 92 located at the lowermost point, the mounting portion 103 of the driver main body 100 pushes the pair of elastic pieces 106 outward to expand the pair of elastic members. Over the piece 106, only the driver body 100 descends.

  <Operation example of the cutting and forming mechanism 35>

  Next, an example of the operation of the cutting and forming mechanism 35 will be described with reference to the operation diagrams of the cutting and forming mechanism 35 in FIGS. 40A and 40B and the operation diagrams of the link 18 in FIGS. 42A to 42F. 40A and 40B are views of the cutting and forming mechanism 35 viewed from the rear side, and show states of an operation process of the cutting and forming mechanism 35 in states A to F. 40A and 40B show only the cutting blade 101, the forming member 102, the needle holding plate 92, and the link shaft 15 for ease of explanation. 42A to 42F show the state (position) of the link shaft 15 when the cutting and forming mechanism is in the state A to the state F (F-1, F-2). C shows the state at the time of the push-down operation, and DF shows the state at the time of return. The detailed parts of the components are also referred to in FIG.

  At the standby position (initial position) before the operation handle 6 is pushed down, the non-metallic needle 2 at the head of the connecting needle 3 is placed on the pedestal 58 as shown in the state A (standby) in FIG. It is arranged in a state. The pusher 61 (see FIG. 19) is urged by the pusher return spring 47 in the direction of the cradle 58 (forward). Therefore, as shown in FIG. 42A, the distal end of the guide arm 65 of the pusher 61 is located forward of the locking small protrusion 67 provided on the guide portion 66 of the stapler body 5. As a result, the tip of the pusher 61 serving as the pressing surface 63 projects into the needle holding plate 92 (see FIG. 26). Further, the non-metallic needle 2 previously cut and formed is mounted between a pair of punching blades 36 (hereinafter, referred to as 36a and 36b when distinguishing left and right) (see FIG. 22).

  When the operator pushes down the operation handle 6, the link shaft 15 is moved down by this pushing-down operation, and the driver main body 100 and the link 18 are pushed down. The link 18 descends while pushing the shaft 25 backward with the pushing projection 30. Then, as shown in FIG. 42B, the lowering of the link 18 is stopped by the upper edge of the guide hole 21 abutting on the guide protrusion 23. At this time, the tip of the guide arm 65 of the pusher 61 climbs over the inclined surface 67a of the small projection 67 for locking, and the pusher 61 retreats, so that the pusher 61 is separated from the needle holding plate 92, and the needle holding plate 92 is moved. Be able to descend. At the time of this lowering, the first regulating portion 91 provided on the inner side surface of the needle holding plate 92 abuts on the connecting needle 3, but the first regulating portion 91 slightly deforms both ends of the connecting needle 3 elastically. Since it is formed with a protruding amount that can pass therethrough, it is possible to prevent the both ends of the connecting needle 3 from breaking or the like.

  When the link shaft 15 is lowered, both the driver main body 100 and the needle holding plate 92 are lowered. When the needle holding plate 92 reaches the lowermost point and stops lowering due to this lowering, only the driver main body 100 connected to the link shaft 15 lowers, and as shown in the state B (cutting) of FIG. The connecting portion 3a of the connecting needle 3 is cut by the blade portion 101a (cutting operation), and one non-metallic needle 2 is cut off from the connecting needle 3. For reference, a plan view of the connection needle 3 to be cut is also shown in state B. Since the connecting portion 3a is cut from the inside to the outside by the blade portion 101a inclined outward, it is cut in a stable state. After the cutting, the driver main body 100 is further lowered, so that the distal end (lower end) of the arm portion 102a of the pair of molding members 102 reaches the nonmetallic needle 2 following the cutting operation, and the arm portion 102a is moved to the nonmetallic needle. The second needle legs 2b and 2c are bent downward (forming operation starts).

  On the other hand, since the lowering of the link 18 is regulated by the guide projection 23, the lowering of the link shaft 15 causes the link 18 to move rearward. Thereafter, as shown in FIG. 42C, the rear extending portion 18b abuts on the regulating protrusion 24, and the retraction of the link 18 is stopped. As the link shaft 15 is further lowered, the link 18 starts rotating backward (rotation in the counterclockwise direction in the figure) around the guide projection 23 as a fulcrum, and is bent by the third guide groove 28. The slide member 122 of 38 starts retreating (see FIG. 42D).

  As shown in FIG. 42E, when the link shaft 15 is lowered to the lowest point and the slide member 122 is in the most retracted state, the cut non-metallic needle 2 is formed as shown in a state C (formed) of FIG. 40A. Is completed, the driver body 100 has reached the lowest point. The needle legs 2b and 2c of the formed non-metallic needle 2 are held by the arm 102a of the formed member 102.

  Next, when the pressing of the operating handle 6 is released, the operating handle 6 is moved in the direction of returning to the initial position by the urging force of the handle return spring 45 (return), and the link shaft 15 starts to rise. In conjunction with these operations, the link 18 rotates in the return direction (clockwise rotation in the figure) with the guide projection 23 as a fulcrum, the slide member 122 moves in the return direction (forward), and the driver main body 100 To rise. The driver main body 100 rises, and the shoulder 103a of the mounting portion 103 abuts against the elastic piece 106 of the needle presser plate 92, so that the needle presser plate 92 moves up together with the driver main body 100. In this rising process, the needle legs 2b, 2c are inserted between the pair of needle pressing portions 105 of the needle pressing plate 92 while the arm portion 102a holds the needle legs 2b, 2c, and the needle tips are picked up (received). Hold). The state D (needle picking) of FIG. 40A shows a state immediately before picking up the needle tip. Since the needle tips of the needle feet 2b and 2c are closed slightly inward by the protruding portions 102b of the molding member 102, The needle tip can be easily picked up by the needle holding section 105. However, since the tapered surface 105a of the needle holding portion 105 guides the needle tip inward, the needle tip can be securely held even when the needle leg 2b 'is slightly opened as shown by the imaginary line in the drawing of the state D. Can be picked up.

  Therefore, the delivery of the needle legs 2b and 2c from the molding member 102 to the needle holding portion 105 can be performed smoothly. In addition, the needle legs 2b, 2c can be held by the needle pressing portion 105 only by raising the needle pressing portion 105, and the elastic deformation of the needle legs 2b, 2c is suppressed, and the load on the needle legs 2b, 2c is reduced. Can be reduced, and more stable molding can be achieved.

  Thereafter, as shown in a state E (needle holding plate uppermost point 1) in FIG. 40B, when the needle holding plate 92 reaches the uppermost point, the needle holding plate 92 stops rising. As shown in state E, the needle legs 2b and 2c of the non-metallic needle 2 come out of the arm portion 102a, but are held by the pair of needle pressing portions 105. Subsequent lifting of the link shaft 15 causes the shoulder 103a of the mounting portion 103 to push and expand the pair of elastic pieces 106 outward, thereby overcoming the pair of elastic pieces 106 and disengaging from each other. As a result, the driver main body 100 is disengaged from the needle presser plate 92 and released from the locked state at the lower portion of the needle presser plate 92, so that only the driver main body 100 rises (the state F-1 in FIG. See point 2)).

  In a state where the engagement between the driver main body 100 and the needle holding plate 92 is released, the needle holding plate 92 can freely fall in the regulating groove 29. Also in this case, as shown in a state F-2 (needle holding plate drop) in FIG. 40B, the needle legs 2b and 2c are hooked on the tip of the needle holding portion 105, and the needle legs 2b and 2c are prevented from coming off from the needle holder 105.

  When the slide member 122 is completely restored, the rotation of the link 18 is stopped. However, as shown in FIG. 42F, the guide arm 65 of the pusher 61 engages with the locking surface 67 a of the locking small convex portion 67. Since the pusher 61 is in the locked state, the advance of the pusher 61 is still restricted. The link 18 and the driver main body 100 are raised by the subsequent rise of the link shaft 15, and at the timing when the nonmetallic needle 2 on which the driver main body 100 is formed is raised until it is received between the pair of punched blades 36a, 36b, The guide arm 65 is pushed up by the lower edge of the second guide groove 27. As a result, the guide arm 65 is disengaged from the locking small convex portion 67, the pusher 61 advances by the urging force of the pusher return spring 47, and the non-metallic needle 2 is moved by the pressing surface 63 between the pair of extraction blades 36a and 36b. Sent. Further, the flat connecting needle 3 to be used next is sent onto the receiving table 58, and the cutting and forming mechanism 35 returns to the standby state (state A '(needle pushing) in FIG. 40B). The link 18 and the link shaft 15 also return to the initial positions (see FIG. 42A).

  [About penetration mechanism 37]

  As shown in FIGS. 39, 43, and 44, the above-described penetrating mechanism 37 forms a through hole p1 (see FIG. 3) in the paper P, and penetrates the needle legs 2b and 2c of the nonmetallic needle 2 through the paper P. A pair of left and right punching blades 36a and 36b to be made, and a crown retainer 110 for holding down the crown 2a of the nonmetallic needle 2 are provided. The extraction blades 36a and 36b and the crown retainer 110 are provided on the driver main body 100, and are moved in the vertical direction Z together with the driver main body 100 by the link shaft 15.

  The pair of punching blades 36a and 36b are attached to the lower side of the driver main body 100 in parallel in the left-right direction Y with a predetermined interval capable of housing and holding the nonmetallic needle 2. The pair of extraction blades 36a and 36b extend downward from the driver main body 100, and are provided at their lower ends with V-shaped blade portions 111a and 111b for cutting the paper P. Each of the punching blades 36a and 36b has a shape that is bent in a substantially crank shape (or an inclined step shape) when viewed from the front or the rear, and includes an upper end (base end) attached to the driver main body 100 and a lower end. The blades 111a and 111b are not in a straight line with respect to the vertical direction Z, and the blades 111a and 111b on the lower end side are offset inward with respect to the upper end (base end).

  More specifically, the interval between the pair of extraction blades 36a and 36b is within the predetermined width from the tip end side where the blade portions 111a and 111b are provided, that is, the inner width of the crown 2a, that is, the pair of leg portions 2b and 2c. , And the first through-holes 112a and 112b that penetrate the paper P first. The outer width of the crown 2a, that is, the outer width of the pair of legs 2b, 2c is equal to or slightly larger than the upper portion of the first penetrating portions 112a, 112b to the base end portion. The parts 113a and 113b are configured.

  The first through-holes 112a and 112b and the second through-holes 113a and 113b are bent in a substantially crank shape at predetermined intermediate positions that are boundaries between the first through-holes 112a and 112b and the second through-holes 113a and 113b. And an inclined step is formed. In this step portion, the interval between the pair of punching blades 36a, 36b is formed so as to gradually increase from the first penetrating portions 112a, 112b toward the second penetrating portions 113a, 113b. The hole expansion portions 114a and 114b push the through hole p1 formed by 112b outward.

  The U-shaped non-metallic needle 2 can be held between the pair of second penetrating portions 113a and 113b arranged opposite to each other. In addition, a step portion at the boundary between the second penetration portions 113a and 113b and the hole expansion portions 114a and 114b supports the needle legs 2b and 2c of the non-metallic needle 2 held by the second penetration portions 113a and 113b. The needle leg support portions 115a and 115b are provided.

  First and second bending members 120a and 120b (see FIG. 45) serving as a pair of bending members of a bending mechanism 38 that bends the needle legs 2b and 2c penetrating the paper P inward are respectively attached to the punching blades 36a and 36b. ) Are formed through the second penetrating portions 113a, 113b and the needle leg supporting portions 115a, 115b. The first and second bending members 120a and 120b (see FIG. 45) are not limited to the holes 116a and 116b as long as they can enter and exit, and are not limited to the holes 116a and 116b. Notch portions in which a part of the support portions 115a and 115b are cut out may be used.

  The crown holding portion 110 is provided between the pair of punching blades 36a and 36b. The crown retainer 110 is configured to be movable in the vertical direction Z with respect to the driver main body 100, and is attached to the driver main body 100 while being urged downward by the crown retainer spring 46.

  In the stapler 1 of the present embodiment, when the penetrating mechanism 37 is lowered to the predetermined position as described above, the bending mechanism 38 operates to start bending the needle legs 2b and 2c. Therefore, in order to be able to bend the needle legs 2b and 2c at a predetermined timing without being affected by the difference in the number (thickness) of the sheets P, the difference in the number (thickness) of the sheets P is determined by the crown holding portion. The movement is absorbed in the vertical direction Z of the 110, so that the penetrating mechanism 37 can be lowered to a predetermined position.

  Further, the penetrating mechanism 37 includes a metal extraction blade guide 117 (see FIG. 45) at the lower portion of the stapler main body 5 for guiding the extraction blades 36a and 36b penetrating the paper P. As described above, the punching blades 36a and 36b are not located on the same straight line in the vertical direction Z because the base portions on the fixed side of the driver main body 100 and the blade portions 111a and 111b at the distal end are not on the same straight line. When the blade portions 111a, 111b of the 36b penetrate the paper P, a force acts such that the punching blades 36a, 36b are caused to flow inward (the punching blades 36a, 36b are tilted inward). Furthermore, since the interval between the pair of hole expansion portions 114a and 114b gradually increases, the punching blades 36a and 36b flow inward even when the hole expansion portions 114a and 114b pass while pushing and expanding the through hole p1 (inside). The force acts in the direction of inclination.

  A punching blade guide 117 is provided to prevent the punching blades 36a and 36b from flowing inward and to prevent flow in the left and right direction. At the time of the penetrating operation, the cutting blades 36a and 36b descend along the side surface of the cutting blade guide 117 having a downward U-shape to prevent the cutting blades 36a and 36b from flowing (deformation) inward. Thus, the sheet P can be smoothly penetrated by the punching blades 36a and 36b.

  As shown in FIG. 41, the punching blade guide 117 includes a first guide portion 117a and a second guide portion 117b having a lower height than the first guide portion 117a. In addition, a chamfered portion 117c is provided by chamfering the upper edge corner in front of the first guide portion 117a (on the side of the second guide portion 107b) in a tapered or curved shape falling forward. In the present embodiment, a step is formed by cutting out the front side of the U-shaped plate member at an interval substantially equal to the interval between the first penetrating portions 112a and 112b, and the non-notched side is formed. The first and second guide portions 117a and 117b are integrally formed as a single component by forming the first guide portion 117a and the cut-out lower side as the second guide portion 117b. With this configuration, the number of components of the stapler 1 can be reduced, the configuration can be simplified, the size can be reduced, and the first and second guide portions 117a and 117b can be operated integrally.

  Note that the configuration of the punching blade guide 117 is not limited to a configuration in which the first guide portion 117a and the second guide portion 117b are configured as one component as in the first embodiment. The guide portions 117a and 117b may be formed separately. Further, the first and second guide portions 117a and 117b formed separately may be configured to operate in synchronization with each other, or the inner surfaces near the cutting edges of the punching blades 36a and 36b are always guided according to the amount of penetration. As long as possible continuous surfaces are formed, each may operate independently.

  The height of the top of the first guide portion 117a is substantially equal to the height of the sheet table 7 on which the sheet P is placed, in order to prevent the first guide portion 117a from bending the sheet P during the penetrating operation. ) Or slightly lower than the paper table 7. Thus, the load when the pair of punching blades 36a and 36b penetrate the paper P can be reduced, and the penetrating operation can be performed smoothly, so that the through hole p1 does not become wider than necessary. Further, with such a formation height, the first guide portion 117a immediately closes the cutting edge 36a, 36b with the first guide portion 117a when the inner surface near the cutting edge protrudes from the sheet P through the sheet P. The side surface can be guided, and the effect of preventing the punching blades 36a and 36b from flowing inward and leftward can be further improved.

  On the other hand, when the pair of needle legs 2b, 2c of the nonmetallic needle 2 penetrate the paper P together with the punching blades 36a, 36b, the second guide portion 117b has a height capable of guiding the tips of the punching blades 36a, 36b. The height is set so that the bending mechanism 38 can perform the bending operation using the space between the second guide portion 117b and the stapler body 5. More preferably, the height is lower than the positions of the tips of the needle legs 2b, 2c when the punching blades 36a, 36b are lowered to the lowermost end, or the first and second bending members 120a of the bending mechanism 38. , 120b enter and exit holes 116a, 116 at a height that does not block. However, in the case where the bending of the needle legs 2b, 2c is started before the punching blades 36a, 36b reach the lowermost end, the second guide portion 117b is located closer to the tip of the needle legs 2b, 2c before bending. May be formed slightly higher.

  The punching blade guide 117 is provided on a slide member 122 of the bending mechanism 38 which will be described later. In conjunction with the reciprocating operation of the slide member 122, the first guide portion 117a and the second guide portion 117b are switched according to the penetrating length of the punching blades 36a, 36b to the sheet P, and the punching blades 36a, 36b are switched. Placed between. When the through hole p1 is formed by the punching blades 36a and 36b (when the penetration length is relatively short), the first guide portion 117a is disposed between the pair of punching blades 36a and 36b, and the punching blades 36a and 36b are provided. (At least the blade portions 111a and 111b, more preferably up to the first penetrating portions 112a and 112b).

  On the other hand, when the pair of punching blades 36a and 36b further descend, they penetrate deeply into the paper P (the penetration length becomes relatively long), and the pair of needle legs 2b and 2c of the nonmetallic needle 2 penetrate the paper P. I do. When the needle legs 2b and 2c penetrating the sheet P are bent by the bending mechanism 38, the first guide portion 117a is retracted from between the pair of punched blades 36a and 36b, and is retracted from the first guide portion 117a. A lower second guide portion 117b is located. The second guide portion 117b guides the distal ends of the punching blades 36a, 36b to prevent the punching blade 6b from moving in the left-right direction and inwardly deforming the first and second bending members 120a. , 120b does not hinder the bending operation of the needle legs 2b, 2c. When the punching blades 36a and 36b penetrate the paper P and when the non-metallic needle 2 is bent, a continuous surface is formed which can always guide the inner surface near the cutting edge in accordance with the amount of penetration of the punching blades 36a and 36b. This allows the punching blades 36a and 36b to reliably move relative to each other between the first guide portion 117a and the second guide portion 117b.

  Further, in the present embodiment, the upper edge of the second guide portion 117b is horizontal on the rear side, but the height is gradually lowered on the front side and inclined forward and downward. That is, when the pair of punching blades 36a and 36b descends along the front side with the retreat of the slide member 122, the tip (near the cutting edge) relatively passes through the side surface of the second guide portion 117b. It is inclined along. Due to this inclination, even when the pair of punching blades 36a, 36b is lowered to the lowermost end, the front ends of the pair of punching blades 36a, 36b are reliably guided on both side wall surfaces of the second guide portion 117b, and the hole portions 116a, 36b are guided. 116b can be prevented from being blocked. Therefore, it is possible to smoothly move in and out of the holes 116a and 116b of the first and second bending members 120a and 120b.

  <Operation example of the penetration mechanism 37>

  Next, an example of the operation of the penetration mechanism 37 will be described with reference to FIGS. 43 and 44, which are explanatory diagrams of the driver main body, and FIGS. 40A and 40B, which are operation diagrams of the penetration mechanism 37 and FIG. 41, which are operation diagrams of the extraction blade guide 117. I will explain while. In the state of the standby position before the penetrating operation (see state A in FIG. 40A), as shown in FIGS. 43 (b) and (e), the sheet is fed by the cutting and forming mechanism 35 between the pair of punching blades 36a and 36b. The U-shaped non-metallic needle 2 is held. At this time, the crown 2a is pressed by the crown pressing portion 110, and the needle legs 2b, 2c are supported by the needle leg support portions 115a, 115b.

  When the link shaft 15 is lowered by the operation of pressing down the operation handle 6, the driver main body 100 provided with the penetration mechanism 37 is lowered (see FIG. 41A). Then, when the punching blades 36a and 36b reach the paper P placed on the paper table 7, a through hole p1 is formed in the paper P by the blade portions 111a and 111b (see the dotted line portion in the state B in FIG. 40A), First, the first penetrating portions 112a and 112b penetrate the through hole p1. At this time, since the first guide portion 117a of the punching blade guide 117 is disposed between the punching blades 36a and 36b, the inward inclination of the first penetrating portions 112a and 112b is prevented, and the smooth penetrating is performed. Becomes possible.

  When the penetrating mechanism 37 further descends, the hole expanding portions 114a and 114b penetrate the paper P while expanding the through holes p1 outward. When the penetrating mechanism 37 further descends, the second penetrating portions 113a and 113b pass through the through hole p1, and the pair of needle legs of the non-metallic needle 2 held inside the second penetrating portions 113a and 113b. 2b and 2c pass through the through hole p1 (see FIG. 41B).

  When the crown 2a reaches the sheet P (see state C in FIG. 40A), the crown presser 110 presses the crown 2a against the sheet P, so that the crown 2a and the sheet P can be brought into close contact with each other. Further, even when the number of sheets of paper P is large, as shown in each of FIGS. 44A and 44B, in a state where the crown presser 110 presses the crown 2a against the paper P and stops, the driver main body is compressed while the crown presser spring 46 is compressed. Only 100 goes down. Therefore, the punching blades 36a and 36b can be lowered to a predetermined position without being affected by the number of sheets P. Therefore, the subsequent bending operation of the needle legs 2b and 2c by the bending mechanism 38 can be performed smoothly at a predetermined timing.

  At the timing of this bending operation, as shown in FIG. 41 (c), the punching blade guide 117 retreats in conjunction with the retraction of the slide member 122, and the second guide portion 117b is provided between the punching blades 36a and 36b. Is arranged. Therefore, the bending operation of the needle legs 2b and 2c by the bending mechanism 38 can be performed smoothly. Note that the force acting on the punching blades 36a and 36b coincides with the second penetrating portions 113a and 113b, and it is difficult for the punching blades 36a and 36b to apply a force that is inclined inward. Therefore, at the timing when the second penetrating portions 113a and 113b pass through the through hole p1, the deformation can be suppressed without guiding the punching blades 36a and 36b. However, in the present embodiment, even at the timing when the second penetrating portions 113a and 113b penetrate the sheet P, the tips of the punching blades 36a and 36b are guided by the second guide portion 117b. Therefore, the inward deformation of the punching blades 36a, 36b is prevented, and the holes 116a, 116b of the punching blades 36a, 36b are moved by the pair of bending members 120a, 120b during the bending operation. The penetrating operation and the subsequent bending operation can be performed more smoothly by suppressing blurring in the left-right direction Y and the like.

  After the sheets P are bound, the movement of the slide member 122 and the pulling blade guide 117 stops as shown in FIG. Thereafter, when the pressing of the operation handle 6 is released, the driver main body 100 moves up together with the link shaft 15, so that the punching blades 36a and 36b come out of the through holes p1, and the penetrating mechanism 37 returns to the standby position. Along with this, the slide member 122 also returns to the original position (forward movement), and the first guide portion 117a also moves toward between the punching blades 36a and 36b. In the present embodiment, the chamfered portion 117c is provided in front of the first guide portion 117a, so that when the first guide portion 117a returns, the staples which are overlapped on the lower side of the sheet P by the chamfered portion 117c. It moves while scooping up the legs 2b and 2c. Therefore, the returning operation of the first guide portion 117a below the needle legs 2b, 2c can be performed more smoothly, and the turning of the needle legs 2b, 2c can be suppressed.

  [About the bending mechanism 38]

  As shown in FIGS. 45 to 48 and the like, the above-described bending mechanism 38 is configured to perform a first bending operation for bending one needle leg (the right needle leg in this embodiment) 2b of the nonmetallic needle 2 penetrating the paper P. A member 120a, a second bending member 120b for bending the other leg (the left needle leg in this embodiment) 2c, a bonding member 121 for bonding one needle leg 2b and the other needle leg 2c, A slide member 122 as a driving member for driving the first and second bending members 120a and 120b and the bonding member 121 in a predetermined order (sequence); and a first and second bending member provided on the stapler main body 5. There is provided a pair of guide surfaces 123a, 123b (see FIGS. 47 and 50A) composed of inclined surfaces for guiding the 120a, 120b in the bending direction.

  The first and second bending members 120a and 120b are formed so as to protrude upward and fold the needle legs 2b and 2c inward, and engage with a pair of guide surfaces 123a and 123b of the stapler body 5. There are provided first and second inclined surfaces 125a and 125b to be combined with each other, and first and second operation steps 126a and 126b with which the slide member 122 is engaged. The movement of the first bending member 120a and the second bending member 120b in the vertical direction Z and the horizontal direction Y is controlled by the forward and backward movement of the slide member 122 in the front-back direction X.

  As the first and second inclined surfaces 125a and 125b are guided along the pair of guide surfaces 123a and 123b with the movement in the vertical direction Z and the horizontal direction Y, the first and second bending members are provided. 120a and 120b move in the diagonal direction while expanding / contracting (proximity / separation) the distance between each other. As a result, the first and second bent projections 124a and 124b enter and exit the holes 116a and 116b of the pair of punching blades 36a and 36b penetrating the paper P.

  The first bending member 120a and the second bending member 120b are integrally connected by a U-shaped connection spring 127 in a plan view to form a Ω-shaped bending unit 128 in a plan view. In this embodiment, the first and second bending members 120a and 120b and the connecting spring 127 are integrally formed of resin to form a bending unit 128, and the bending unit 128 is stapled with the connecting spring 127 compressed. It is attached to the inner surface of the main body 5. For this reason, it is excellent in shape stability and flexibility, and the storage of the bending unit 128 in the stapler main body 5 is improved, and the first and second bending members 120a and 12b can be freely moved in the vertical and horizontal directions. it can.

  The connection spring 127 urges the first and second bending members 120a and 120b in a direction to move outward, that is, a direction in which the first and second bending members 120a and 120b are pushed down (return direction). Therefore, when the first and second bending members 120a and 120b are pressed down by the return operation of the slide member 122 and return to the initial position, the restoring force of the connecting spring 127 assists the return operation and suppresses jamming and the like. The return operation can be performed smoothly, and the operability at the time of the return operation can be improved. The connecting spring 127, in the opposite direction, moves the first and second bending members 120a and 120b inward, ie, pushes up the first and second bending members 120a and 120b. The operability at the time of the bending operation can be improved.

  When the folding unit 128 is attached to the stapler main body 5, as shown in FIG. 47, the mounting projection 129 projecting from the connecting spring 127 is engaged with the hole 130 provided in front of the stapler main body 5, Attachment projections 131a and 131b (see FIG. 45) projecting from the first and second bending members 120a and 120b, respectively, are recessed with respect to the stapler body 5 corresponding to the inclination of the guide surfaces 123a and 123b. It engages with the long holes 132a, 132b. This prevents the folding unit 128 from being accidentally dropped from the stapler main body 5 and allows the first and second bending members 120a and 120b to move in the vertical and horizontal directions (oblique directions).

  Note that the connection spring 127 is not limited to a U-shape in plan view. If the first bending member 120a and the second bending member 120b can be urged in the direction of pushing down (or the direction of pushing up), a connection spring 127 having a V-shape, a W-shape, an I-shape or the like in plan view can be used. May be.

  As shown in FIG. 50A and the like, the pair of guide surfaces 123a and 123b that guide the first and second bending members 120a and 120b have their lower ends located outermost in the left-right direction Y and gradually approach the upper ends. It consists of a surface that slopes inward. That is, the pair of guide surfaces 123a and 123b are formed in a C shape when viewed from the front. Note that the guide surfaces 123a and 123b are not necessarily limited to continuous surfaces, and may be configured by a plurality of separate surfaces.

  The inclination angle (the inclination angle with respect to the horizontal direction) of each of the guide surfaces 123a and 123b is set to about 45 ° in the present embodiment, but is not limited to this, and the first and second bending members 120a and 120b are not limited thereto. It can be appropriately adjusted according to the movable range, operation timing, and the like of the slide member 120b and the slide member 122.

  By setting the inclination angle to about 45 ° as in this embodiment, the first and second bending members 120a and 120b can be moved in the narrow space in the stapler body 5 while keeping the moving distance of the slide member 122 as short as possible. Can be pushed up efficiently. Further, when the punching blades 36a and 36b descend while expanding the through hole p1 of the sheet P outward, the edge of the through hole p1 may protrude downward so as to hang down. Also in this case, by setting the guide surface to about 45 °, the interference between the hanging edge and the first and second bent protrusions 124a and 124b is avoided, and the first and second bent members 120a and 120b are separated. It can be smoothly moved up and down in an oblique direction. Therefore, the operability of the first and second bending members 120a and 120b can be improved, and the operability and the compactness of the stapler 1 can be improved.

  The laminating member 121 (see FIG. 45) is pivotally supported on the stapler body 5 at one end (front end) via a support shaft 133 (see FIGS. 48 and 51) extending in the left-right direction Y. Have been. The other end (rear end) of the bonding member 121 is provided with a pressing portion 134 for pressing one of the needle legs 2b and the other needle leg 2c of the nonmetallic needle 2 from below to bond them. As the bonding member 121 rotates up and down around the support shaft 133, the pressing portion 134 moves in the vertical direction Z.

  The slide member 122 (see FIG. 45) slides in the front-rear direction X with respect to the stapler main body 5, and pushes up or down the first and second bending members 120a, 120b and the bonding member 121 as appropriate to move the stapler body 5 up and down. Move to As shown in FIG. 11, the slide member 122 is attached to the stapler main body 5 so as to be slidable in the front-rear direction X. The slide member 122 is constantly urged forward (return direction) by the slider return spring 48. The shaft 26 (slider drive shaft, see FIG. 9) is provided behind the slide member 122, and is inserted into the third guide groove 28 of the link 18 (see FIGS. 42A and 48). ), The slide member 122 and the link 18 are connected. Therefore, the slide member 122 and the operation handle 6 are connected via the link 18, and the slide member 122 can be operated in conjunction with the operation of the operation handle 6.

  The link 18 converts the reciprocating operation of the operation handle 6 in the up-down direction Z into the reciprocating operation of the slide member 122 in the front-rear direction X. The slide member 122 basically reciprocates in the front-rear direction X in conjunction with the rotation of the link 18 (see FIG. 42E and the like). Further, since the third guide groove 28 is formed to be long in the vertical direction Z, only the link 18 and the operation handle 6 are held in the vertical direction Z while maintaining the engagement between the shaft 26 and the third guide groove 28. You are allowed to move.

  In other words, the operation handle 6 and the slide member 122 basically operate in conjunction with each other via the link 18, but allow a predetermined operation of only the other, and maintain the connected state without being separated from each other. Configuration.

  Further, as shown in FIG. 45C, the above-described punching blade guide 117 is attached to the slide member 122 so that the slide member 122 can reciprocate in the front-rear direction X integrally with the slide member 122. When the slide member 122 retreats and the first and second bending members 120a and 120b enter and exit the holes 116a and 116b of the pair of extraction blades 36a and 36b, the extraction blade guide 117 also moves backward together with the slide member 122. The first guide portion 117a moves and is retracted from between the punching blades 36a and 36b, and the second guide portion 117b is disposed. Therefore, interference between the punching blade guide 117 and the first and second bending members 120a and 120b during the bending operation can be prevented.

  The slide member 122 has first and second side walls 135a, 135b on both sides in the left-right direction Y for controlling the movement of the first and second bending members 120a, 120b in the up-down direction Z and the left-right direction Y. ing. The first and second operating steps 126a and 126b of the first and second bending members 120a and 120b engage with the first and second side walls 135a and 135b, respectively.

  As shown in FIG. 46, the first and second side walls 135a and 135b are sequentially arranged from the rear (upper side in the figure) to the front side (lower side in the figure) from the first and second bending members 120a and 120b. And the first and second standby portions 136a and 136b for holding the first and second bending members 120a and 120b inward while pushing up the first and second bending members 120a and 120b. The two operating portions 137a and 137b and the first and second holding portions 138a and 138b for holding the first and second bending members 120a and 120b in a predetermined pushed-up state so as not to be pushed up more than a predetermined amount. Have.

  The first and second standby portions 136a and 136b are formed at a height that does not push up the first and second bending members 120a and 120b. As shown in FIGS. 45, 50A, 50B, etc., the first and second operating portions 137a, 137b are formed by inclined surfaces that gradually become higher toward the front. Further, as shown in FIG. 46, the first and second operating portions 137a and 137b are formed so as to be located gradually inward toward the front, and the interval between them is gradually reduced toward the front. Have been. The first and second holding portions 138a and 138b are formed horizontally along the direction in which the slide member 122 extends, following the first and second operating portions 137a and 137b.

  In the present embodiment, first, the first bending member 120a is operated to bend one of the right needle legs 2b. Next, the second bending member 120b is operated with a predetermined phase difference therebetween to bend the other left needle leg 2c. In order to enable this, the start position of the first operating portion 137a in the front-rear direction X is provided behind the position of the second operating portion 137b. With this configuration, when the slide member 122 retreats, first, the first operating portion 137a pushes up the first bending member 120a via the first operating step portion 126a, and simultaneously moves in the inward direction (the first bent protrusion 124a). In the direction of projecting from one of the holes 116a). Thereafter, the second operating portion 137b pushes up the second bending member 120b via the second operating step portion 126b, and inward (the direction in which the second bent protrusion 124b projects from the other hole 116b). Guide to

  On the other hand, as shown in FIGS. 45 and 48, at the front end of the slide member 122, an operating shaft 139 extending in the left-right direction Y is provided, and the operating shaft 139 is provided on the wall surface of the bonding member 121. The groove 140 is engaged. The cam groove 140 and the operating shaft 139 are an example of a driving mechanism of the bonding member 121, and convert the movement of the slide member 122 in the front-rear direction X into the rotation of the bonding member 121 in the vertical direction Z. is there.

  The cam groove 140 includes a standby groove 141 that holds the bonding member 121 at a standby position (initial position) without rotating the bonding member 121 in response to the movement of the slide member 122 in the front-rear direction X, and a rotation groove that rotates the bonding member 121. 142 and a holding groove 143 for holding the bonding member 121 in a predetermined rotation state.

  As shown in each drawing of FIG. 51, the standby groove 141 is inclined with respect to the extending direction of the bonding member 121, and the bonding member 121 is at the standby position and the pressing portion 134 is located at the lowest point. It is composed of grooves that are horizontal in the state. The rotating groove 142 is formed of a groove that is inclined in a direction symmetrical to the standby groove 141, and the holding groove 143 is formed of a groove that extends along the extending direction of the bonding member 121.

  By configuring the cam groove 140 and the operating shaft 139 as described above, at the timing when the slide member 122 moves rearward and the first and second bending members 120a and 120b bend the needle legs 2b and 2c, When the operating shaft 139 passes through the standby groove 141, the bonding member 121 is in a standby state without rotating. At the timing when the bending of the needle legs 2b, 2c by the first and second bending members 120a, 120b is completed, the operating shaft 139 passes through the rotating groove 142, so that the bonding member 121 rotates and the pressing portion 134 Rises and presses the needle legs 2b and 2c to bond them. Thereafter, as the operating shaft 139 passes through the holding groove 143, the rotation of the bonding member 121 is stopped, and the pressing portion 134 is held in a raised state.

  <Example of operation of bending mechanism 38>

  Next, an example of the operation of the bending mechanism 38 will be described with reference to the operation diagrams of each member of the bending mechanism shown in FIGS. In the standby position (initial position) before the operation handle 6 is pressed down in FIG. 51A, the first and second bending members 120a and 120b are located at the lowest points (FIG. 50A). Since the operating shaft 139 of the slide member 122 is located in the standby groove 141 of the bonding member 121, the pressing portion 134 is located at the lowest point (see FIG. 49 (a) and the like).

  By pushing down the operation handle 6, the penetrating mechanism 37 is activated, and the link 18 starts rotating at the timing when the first penetrating portions 112a, 112b of the punching blades 36a, 36b penetrate the paper P (FIG. 42D, See FIG. 42E). When the shaft 26 is guided by the third guide groove 28, the slide member 122 starts moving backward (retreating), and the bending mechanism 38 operates. First, when the upper end of the first operation portion 137a pushes up the first operation step portion 126a, the first bending member 120a is guided obliquely by the one guide surface 123a and rises in an oblique direction. Thus, the first bent protrusion 124a projects from the one hole 116a to the inside of the pair of punched blades 36a and 36b, and the one needle leg 2b is bent. Next, the upper end of the second operation portion 137b pushes up the second operation step portion 126b with a predetermined phase difference interposed therebetween, and is guided by the other guide surface 123b so that the second bending member 120b is moved obliquely. To rise. As a result, the second bent protrusion 124b protrudes from the other hole 116b to the inside of the pair of extraction blades 36a, 36b, and the other needle leg 2c is bent (see FIG. 50B).

  Note that the second bending member 120b may be configured to start bending the other needle leg 2c in a state where the one needle leg 2b is completely bent. The bending of the other needle leg 2c by the second bending member 120b is started at the timing (phase difference) at which the bending member 120a slightly bent the one needle leg 2b inward. Even in this case, the one needle leg 2b and the other needle leg 2c can be bent without interference, and the moving distance (stroke) of the slide member 122 involved in bending the pair of needle legs 2b, 2c can be shortened. can do.

  Further, the first and second bending members 120a and 120b are raised obliquely by the action of the slide member 122 and the guide surfaces 123a and 123b, and the needle legs 2b and 2c are moved from a direction substantially orthogonal to the needle legs 2b and 2c. Since the 2c is bent, the escape of the needle legs 2b, 2c in the front-rear direction X can be suppressed without taking measures to prevent the escape. Therefore, the needle legs 2b, 2c can be smoothly bent, and the bending of the needle legs 2b, 2b can be suppressed, so that the appearance and the binding function can be improved.

  When the needle legs 2b, 2b are bent, the slide member 122 is retracted, so that the first guide portion 117a of the extraction blade guide 117 is retracted rearward from between the pair of extraction blades 36a, 36b. The two guide portions 117b are arranged (see FIGS. 41 (c) and 49 (b)). Therefore, the bending operation can be performed by utilizing the space between the stapler main body 5 and the second guide portion 117b, and the first and second bending members 120a and 120b are not interfered with the extraction blade guide 117. Can pass through the holes 116a and 116b. Also, while the first and second bending members 120a and 120b are operating, the operating shaft 139 is located in the standby groove 141, so that the bonding member 121 does not operate and the standby state is maintained. Have been.

  Further, in this embodiment, the end side (front) of the first operating portion 137b with respect to the first bending member 120a is formed slightly lower, and when the bending of one needle leg 2b is completed, the state shown in FIG. 50D, the first bending member 120a is lowered. With this configuration, interference between the first bending member 120a and the other needle leg 2c can be further suppressed. This is particularly effective when a non-metallic needle having long needle legs 2b and 2c is used, or when the thickness of the paper P is thin and the needle legs 2b and 2c protruding from the paper P are long. Therefore, the stapler 1 can smoothly bend the needle legs 2b and 2c without being affected by the type of the nonmetallic needle 2 to be used, the thickness of the paper P, and the like.

  When the bending of the pair of needle legs 2b, 2c is completed, the first and second operating steps 126a, 126b of the first and second bending members 120a, 120b are connected to the first and second holding portions 138a, 138b. By being located, the raising of the first and second bending members 120a and 120b is stopped. At this timing, when the operating shaft 139 passes through the rotating groove 142, the bonding member 121 rotates around the support shaft 133, and the pressing portion 134 rises, and the one needle leg 2b and the other needle leg 2c Is pressed and bonded (see FIG. 49 (c), FIG. 50C, FIG. 51 (c)). Also at this time, since the second guide portion 117b of the extraction blade guide 117 is located between the pair of extraction blades 36a and 36b, the operation of the bonding member 121 is not affected by the extraction blade guide 117. When the bonding of the needle legs 2b and 2c is completed, the rotation of the bonding member 121 is stopped by the operation shaft 139 passing through the holding groove 143 (FIG. 51 (c)). Thereafter, the retraction of the slide member 122 also stops (FIG. 49 (c)).

  By releasing the operation of pressing down the operation handle 6, the operation handle 6 is pushed up by the restoring force of the handle return spring 45, and the link 18 rotates in the return direction and is guided by the third guide groove 28. Then, the slide member 122 moves in the return direction (forward). As described above, the slide member 122 can be forcibly returned by the link 18, but in this embodiment, the slider return spring 48 is further provided. The urging force of the slider return spring 48 assists the movement of the slide member 122 in the return direction, and enables a smoother return operation.

  With the return operation of the slide member 122, the operating shaft 139 passes through the rotary groove 142 and returns to the standby groove 141, so that the pressing portion 134 descends and returns to the standby position. Further, the slide member 122 moves while pressing the first and second bending members 120a and 120b outward by the outer wall surfaces of the first and second operating portions 137a and 137b, so that the first and second bending members 120a and 120b are moved. Are forcibly moved in the pushing direction and in the direction away from each other in the left-right direction Y. In addition, the first and second bending members 120a and 120b can be smoothly pushed down and separated, and returned to the initial position, in cooperation with the urging force of the connection spring 127. As described above, the respective parts of the bending mechanism 38 can be returned to the initial position by the link 18 in conjunction with the returning operation of the operation handle 6.

  Further, the link 18 allows the bending mechanism 38 to operate in conjunction with the penetrating mechanism 37 or the like directly driven by the operation handle 6 at a predetermined timing over the entire area, and also performs the return operation. Can also be linked. When there is no such interlocking relationship over the entire area, the return of the slide member 122 and the return of the penetrating mechanism 37 and the like are performed independently. Therefore, even if the slide member 122 does not return due to, for example, a paper jam or a malfunction of the slider return spring 48, only the penetrating mechanism 37 and the like return alone. Therefore, the binding operation may be continued without the operator noticing the malfunction of the bending mechanism 38, which may affect the durability of the components and the operability of the stapler 1.

  On the other hand, in this embodiment, since the operation and the return operation of each mechanism are linked by the link 18, any one of the operation handle 6, the cutting and forming mechanism 35, the penetration mechanism 37, and the bending mechanism 38 has a malfunction. When a return failure occurs, the operation and return operation of other mechanisms and the operation handle 6 are also stopped. Therefore, when the operation handle 6 does not completely return to the initial position, the operator can easily recognize that an operation failure has occurred in any of the mechanisms, and can quickly respond. Further, it is possible to prevent the operation from continuing without noticing the operation failure, prevent the components from being caught, etc., and improve the durability of the stapler 1.

  Next, a modified example of the bending mechanism will be described with reference to FIG. In the above embodiment, the first and second bending members 120a and 120b are urged in the return direction (downward pressing direction) by the elastic force of the connection spring 127 connecting the first and second bending members 120a and 120b. I have. On the other hand, in the modified examples of FIGS. 52A to 52C, the separately formed first and second bending members 120a and 120b are urged by a coil spring in a push-up direction or a push-down direction. .

  In the modification shown in FIG. 52A, the first bending member is formed by a torsion coil spring 146 disposed between the projection 145 provided on the first bending member 120a and the projection 145 provided on the side surface of the stapler body 5. 120a is urged in the push-up direction. Further, the second bending member 120b is urged in the pushing direction by a compression coil spring 147 disposed between the lower end of the second bending member 120b and the bottom surface of the stapler body 5. Note that the first bending member 120a may be urged by the compression coil spring 147 and the second bending member 120b may be urged by the torsion coil spring 146, or both the first and second bending members 120a and 120b may be urged. The torsion coil spring 146 or the compression coil spring 147 may be used.

  In the modification shown in FIG. 52B, the first bending is performed by the torsion coil spring 149 disposed between the protrusion 145 provided on the first bending member 120a and the protrusion 145 provided on the top surface of the stapler body 5. The member 120a is urged in the return direction. Further, the second bending member 120b is urged in the return direction by the tension coil spring 150 disposed between the spring mounting portion 148 provided on the second bending member 120b and the spring mounting portion 148 provided on the stapler body 5. are doing. Note that the first bending member 120a may be urged by the tension coil spring 150 and the second bending member 120b may be urged by the torsion coil spring 149, or both the first and second bending members 120a and 120b may be urged. It may be urged by the torsion coil spring 149 or the extension coil spring 150.

  In the modification shown in FIG. 52 (c), a compression coil spring 151 is arranged between a spring mounting portion 148 provided on the first bending member 120a and a spring mounting portion 148 provided on the second bending member 120b. The first and second bending members 120a and 120b are urged in the return direction. Note that a tension coil spring 150 may be provided in place of the compression coil spring 151, and the first and second bending members 120a and 120b may be urged in the push-up direction.

  By biasing the first and second bending members 120a and 120b in the return direction as in the present embodiment and the modified examples of FIGS. 52 (b) and (c), the first and second bending members are urged. It is possible to improve the operability at the time of pushing down 120a, 120b. Further, as in the modification of FIG. 52 (a), the first and second bending members 120a and 120b are urged in the pushing direction so that the first and second bending members 120a and 120b are pushed up. Operability can be improved.

  The means for urging the first and second bending members 120a and 120b is not limited to the embodiment or the modification, and other springs such as a leaf spring and a spring may be used. A biasing means other than a spring may be used. Further, since the vertical movement of the first and second bending members 120a and 120b can be sufficiently controlled by the operating portion of the slide member 122, it is not always necessary to provide such an urging means.

  Alternatively, only the movement of the first and second bending members 120a and 120b in the vertical direction Z is slid without using a configuration in which the distance between the first and second operating portions 137a and 137b of the slide member 122 is gradually reduced. A configuration in which the movement is forcibly performed by the member 122 and the movement in the left-right direction Y is performed by a biasing unit such as a spring may be employed. Alternatively, the first and second bending members 120a, 120b may be forcibly moved in the left-right direction Y by the slide member 122 and moved in the up-down direction Z by the biasing means. In any case, the first and second bending members 120a and 120b can be smoothly driven in combination with the guide function of the pair of guide surfaces 123a and 123b.

  [Molding structure and function and effect of non-metallic needle 2 of molding mechanism and needle holding mechanism]

  (Structure 1) As described above, the stapler 1 of this embodiment includes a forming mechanism (forming member 102) that bends a non-metallic needle in a flat state to form a U-shape, and a non-shaped non-metallic needle. A needle holding mechanism (needle holding plate 92) for holding the needle legs 2b and 2c of the metal needle 2;

  The non-metallic needle 2 formed in a U-shape is exchanged between the forming mechanism and the needle holding mechanism.

  The forming mechanism and the needle holding mechanism are provided so as to be relatively movable with respect to the non-metallic needle 2 in a direction in which the non-metallic needle 2 is bent in a U-shape, and the forming mechanism and the needle holding mechanism are mutually moved. It is provided so as to be relatively movable.

  The forming mechanism is configured to move relative to the non-metallic needle 2 and the needle holding mechanism to bend the non-metallic needle 2 in the moving direction.

  When the forming mechanism bends the non-metallic needle 2 into a U-shape, the needle holding mechanism retracts to a position where it does not come into contact with the bent needle legs 2b and 2c, and is bent to form a U-shaped non-metallic needle. When receiving the non-metallic needle 2, the needle legs 2b and 2c of the non-metallic needle 2 formed in a U-shape are held by being relatively moved toward the non-metallic needle 2.

  (Effect 1) With the above configuration, the non-metallic needle 2 is formed into a U-shape by the relative movement of the forming mechanism with respect to the non-metallic needle 2 along the U-shaped forming direction. At this time, since the needle pressing mechanism is retracted to a position where it does not come into contact with the needle legs 2b and 2c, it is possible to reduce the load on the needle legs 2b and 2c when it is formed into a U-shape. After molding, the needle legs 2b and 2c can be held by the relative movement of the needle pressing mechanism toward the non-metallic needle 2. As described above, the molding and the transfer of the non-metallic needle 2 can be performed only by moving the molding mechanism and the needle holding mechanism relative to the non-metallic needle 2. Further, by holding the needle legs 2b, 2c by the needle pressing mechanism, the U-shaped molding state can be maintained, and the deformation of the needle legs 2b, 2c can be suppressed. Therefore, the non-metallic needle 2 can be formed more stably.

  (Configuration 2) The forming mechanism has a forming member 102 that bends the non-metallic needle 2 to form a U-shape, and the forming member 102 is substantially parallel to the direction in which the non-metallic needle 2 is bent and formed into a U-shape. And a pair of arms 102a for bending the needle legs 2b and 2c and holding a pair of non-metallic needles 2b and 2c formed in a U-shape.

  The pair of arm portions 102a can be elastically deformed in the direction of expanding and contracting the distance between each other, and the distance between the distal ends (protruding portions 102b) holding the distal ends of the pair of needle legs 2b and 2c has a U-shape. It is preferable that the distance between the pair of needle legs 2b and 2c of the non-metallic needle 2 formed to be smaller than that of the pair of needle legs 2b and 2c.

  (Effect 2) With the above configuration, when the needle legs 2b and 2c are held by the pair of arm portions 102a, the tip of the needle (protrusion portion 102b) that is narrower than the interval between the needle legs 2b and 2c causes the needle tip to be slightly. Closed inward. Therefore, even when the needle legs 2b and 2c are slightly deformed, the needle tip can be easily picked up by the needle holding mechanism, and the nonmetallic needle 2 can be formed more stably.

  (Structure 3) The needle holding mechanism is arranged via the insertion interval of the pair of needle legs 2b and 2c of the non-metallic needle 2 formed in a U-shape, and moves relative to the non-metallic needle 2, It may have a pair of needle holding parts 105 that take in and hold the pair of needle legs 2b and 2c inside.

  When receiving the non-metallic needle 2 from the forming mechanism, the needle holder 105 holds the tips of the pair of needle legs 2b, 2c with the pair of arms 102a holding the pair of needle legs 2b, 2c. It is preferable that it is comprised as follows.

  (Effect 3) With the above configuration, the pair of needle legs 2b and 2c can be inserted into the pair of needle holders 105 and held securely by simply moving the needle holder relative to the non-metallic needle 2. it can. Further, by holding the needle legs 2b and 2c by the needle pressing portion 105 before the non-metallic needle 2 is detached from the arm portion 102a, the opening of the needle legs 2b and 2c is suppressed, and the U-shaped state is maintained. Can be. Therefore, molding of the nonmetallic needle 2 can be performed more stably. In addition, there is no need to perform opening and closing operations of the needle holding portion 105 and to provide members for the operation, so that the configuration of the forming mechanism and the needle holding mechanism can be simplified, the number of parts can be reduced, and the like, and cost can be reduced. A stapler 1 can be provided.

  (Configuration 4) An engaging portion that engages with the other of the needle holding mechanism and the forming mechanism so as to be integrally movable relative to each other when the non-metallic needle 2 is transferred between the forming mechanism and the needle holding mechanism. (Elastic piece 106).

  (Effect 4) With the above configuration, for example, the engagement of the engaging portion is released, and only the forming mechanism is relatively moved with respect to the nonmetallic needle 2, thereby forming the nonmetallic needle 2 by the forming mechanism. be able to. After the molding, the molding mechanism and the needle holding mechanism are engaged with each other by the engaging portion, and the non-metallic needle 2 molded in a U-shape by the molding mechanism is held by the relative movement integrally. The pressing mechanism can hold the needle legs 2b and 2c. Accordingly, the opening of the needle legs 2b and 2c can be suppressed, the U-shaped state can be maintained, the non-metallic needle 2 can be transferred and received more smoothly and reliably, and more stable molding can be performed. Becomes

  (Arrangement 5) A penetrating mechanism 37 having a pair of punching blades 36a, 36b for penetrating the pair of needle legs 2b, 2c of the nonmetallic needle 2 through the paper P is provided, and a forming mechanism is provided integrally with the penetrating mechanism 37. May be.

  (Effect 5) With the above configuration, the forming mechanism can be operated in conjunction with the penetration mechanism 37, and the number of parts can be reduced. Therefore, the installation space for the forming mechanism and the like can be reduced, and the stapler 1 can be downsized.

  (Configuration 6) The forming mechanism may be housed relatively movably inside the needle holding mechanism.

  (Operation and Effect 6) With the above configuration, the volumes of the forming mechanism and the needle holding mechanism can be further reduced, and the stapler 1 can be downsized. Further, the molding mechanism can be relatively moved within the needle holding mechanism, and the movement range of the molding mechanism can be restricted as desired, so that movement control can be easily performed.

[Guide Structure of Drawing Blades 36a and 36b of Drilling Blade Guide 117 and Action and Effect]
(Structure 1) As described above, the stapler 1 of this embodiment includes the penetrating mechanism 37 having the pair of extraction blades 36a and 36b for penetrating the pair of needle legs 2b and 2c of the nonmetallic needle 2 through the sheet P, and the sheet And a bending mechanism 38 for bending the pair of needle legs 2b and 2c penetrating through the sheet P along the sheet P. Further, a punching blade guide 117 that guides the inside of the pair of punching blades 36a and 36b penetrating the paper P is provided.

  The extraction blade guide 117 is located between the pair of extraction blades 36a and 36b, and guides a portion of the extraction blades 36a and 36b penetrating from the sheet P, and the sheet P of the extraction blades 36a and 36b. And a second guide portion 117b that guides a part of a portion penetrating from the second guide portion 117b.

  Before the pair of punching blades 36a and 36b penetrate the sheet P and before the bending mechanism 38 bends the needle legs 2b and 2c, the first guide portion 117a is positioned between the punching blades 36a and 36b and the punching blade. When the pair of punching blades 36a and 36b penetrate the paper P and the bending mechanism 38 bends the needle legs 2b and 2c, the second guide portion 117b is positioned between the punching blades 36a and 36b. It is configured to guide the punching blades 36a, 36b when it is positioned.

  (Operation and Effect 1) According to the above configuration, before the pair of punching blades 36a and 36b penetrate the paper P and the bending mechanism 38 bends the needle legs 2b and 2c, the paper P is guided by the first guide portion 117a. The portions of the punching blades 36a and 36b that penetrate from the paper P are guided, and the inward flow (deformation) of the punching blades 36a and 36b can be suppressed. Also, when the pair of punching blades 36a and 36b penetrate the paper P and the folding mechanism 38 bends the needle legs 2b and 2c, the portion of the punching blades 36a and 36b penetrating from the paper P by the second guide portion 117b. Of the cutting blades 36a and 36b and the inward deformation and inward deformation of the cutting blades 36a and 36b can be suppressed. Therefore, there is no need to guide with the bending members 120a, 120b and the like. Further, the first guide portion 117a and the second guide portion 117b can be switched only by moving the punching blade guide 117. Therefore, the first guide portion 117a and the second guide portion 117b can always guide the tips of the punching blades 36a and 36b, and the number of components and the configuration are simple, and the punching blades 36a and 36b of the penetrating mechanism 37 are provided. Can be suppressed, and the binding operation can be performed smoothly.

  (Structure 2) A pulling blade guide driving unit (sliding member 122) that can move the pulling blade guide 117 in the direction of bending the needle legs 2b, 2c is provided. The pulling blade guide 117 is moved in the direction of bending the needle legs 2b, 2c. The one guide part 117a and the second guide part 117b may be configured to be arranged side by side. At this time, before the pair of punching blades 36a and 36b penetrate the paper P and before the bending mechanism 38 bends the needle legs 2b and 2c, the first blade 117a drives the punching blade guide driving unit. When the pair of punching blades 36a and 36b penetrate the sheet P and the folding mechanism 38 bends the needle legs 2b and 2c, the second guide portion 117b is positioned between the punching blades 36a and 36b. It is preferable to move the punching blade guide 117 so as to be located at the position.

  (Effect 2) With the above configuration, the first guide portion 117a and the second guide portion 117b can be moved only by moving the pulling blade guide driving portion (slide member 122) in the direction in which the needle legs 2b and 2c are bent. This can be easily performed, and a more stable guide can be achieved. In addition, if the 1st guide part 117a and the 2nd guide part 117b are arrange | positioned side by side and can be moved by a punching blade guide drive part, the 1st guide part 117a and the 2nd guide part 117b will separate. Or one piece.

  (Configuration 3) Further, as described above, the stapler 1 of this embodiment includes the penetrating mechanism 37 having the pair of punching blades 36a and 36b for penetrating the pair of needle legs 2b and 2c of the nonmetallic needle 2 through the paper P. And a bending mechanism 38 for bending the pair of needle legs 2b and 2c penetrating the paper P along the paper P. Further, a punching blade guide 117 that guides the inside of the pair of punching blades 36a and 36b penetrating the paper P is provided.

  The extraction blade guide 117 is located between the pair of extraction blades 36a and 36b, and guides a portion of the extraction blades 36a and 36b penetrating from the sheet P, and the sheet P of the extraction blades 36a and 36b. And a second guide portion 117b for guiding a part of the portion penetrating through the sheet P, and the first guide portion 117a and the second guide portion 117b pass through the sheet P and pass through the sheet P. When the bending mechanism 39 bends the pair of needle legs 2b and 2c, the needle legs always have a continuous surface that supports the inside of the punching blades 36a and 36b.

  (Effect 3) As described above, in the same manner as (Effect 1) described in (Structure 1), it is possible to suppress the movement of the punching blades 36a and 36b in the left-right direction Y and the inward deformation. it can. Also, the inside of the punching blades 36a, 36b is always kept from when the pair of punching blades 36a, 36b penetrate the paper P to when the folding mechanism 39 bends the pair of needle legs 2b, 2c that have passed through the paper P. The instruction can be given on the continuous surface, and the effect of suppressing the blurring of the punching blades 36a and 36b in the left-right direction Y and the inward deformation can be further enhanced.

  (Configuration 4) The first guide portion 117a and the second guide portion 117b may be formed as one component.

  (Operation and Effect 4) With the above configuration, the punching blade guide 117 can be obtained with a simpler configuration and with a smaller number of components, and the size can be reduced. In addition, synchronous movement and switching between the first guide portion 117a and the second guide portion 117b can be easily performed.

  (Structure 5) The height of the first guide portion 117a is substantially equal to the height of the sheet table 7 on which the sheet P is placed, and the height of the second guide portion 117b is higher than that of the first guide portion 117a. Is also preferably low.

  (Effect 5) With the above configuration, the load when the pair of punching blades 36a and 36b penetrate the paper P can be reduced, the penetrating operation by the penetrating mechanism 37 can be performed smoothly, and the through hole p1 is more than necessary. Can be prevented from becoming wide. Therefore, the sheet P can be more stably bound by the non-metallic needle 2. Further, by making the second guide portion 117b lower than the first guide portion 117a, even if the pair of punching blades 36a and 36b penetrate deeply into the paper P, the inner side surface near the blade edge can be guided. In addition, even if the second guide portion 117b is located between the punching blades 36a and 36b, the bending operation by the bending mechanism 38 can be performed smoothly.

  (Configuration 6) The punching blade guide 117 may be provided on a drive member (slide member 122) that drives the bending mechanism 38.

  (Effect 6) With the above configuration, by driving the driving member (reciprocating movement of the slide member 122), the first and second guide portions 117a and 117b can be easily switched between the pair of punching blades 36a and 36b. Can be arranged. Therefore, there is no need to separately provide a driving member for the punching blade guide 117, and the number of components can be reduced, and the configuration can be simplified and downsized. Further, the timing of the bending operation of the bending mechanism 38 and the driving operation of the punching blade guide 117 can be more easily and more precisely performed, and the penetrating operation, the bending operation, and the like can be performed more smoothly.

  (Configuration 7) The first guide portion 117a may be provided with a chamfered portion 117c at a corner on the second guide portion 117b side.

  (Effect 7) With the above configuration, when the bending operation is completed and the first guide portion 117a returns to the position between the pair of punching blades 36a and 36b, the needle legs 2b and 2c are moved by the chamfer portion 117c. Move while scooping up. Therefore, the returning operation of the first guide portion 117a below the needle legs 2b, 2c can be performed more smoothly, the curl of the needle legs 2b, 2c and the like are suppressed, and the paper P is More stable binding is possible.

  [About the bending structure and operation effect of the bending mechanism 38]

  (Structure 1) As described above, the stapler 1 of this embodiment includes the penetrating mechanism 37 having the pair of extraction blades 36a and 36b for penetrating the pair of needle legs 2b and 2c of the nonmetallic needle 2 through the sheet P, and the sheet And a bending mechanism 38 for bending the pair of needle legs 2b and 2c penetrating through the sheet P along the sheet P.

  Holes 116a, 116b (or notches) are provided in the pair of punching blades 36a, 36b in second penetrating portions 113a, 113b (penetrating portions) penetrating the paper P.

  As shown in FIG. 45, the bending mechanism 38 moves along the bending direction in which the pair of needle legs 2b, 2c are bent inward, and projects from the holes 116a, 116b between the pair of extraction blades 36a, 36b. First and second bending members 120a and 120b for bending the pair of needle legs 2b and 2c, and first and second guide surfaces 123a and 123b for guiding the first and second bending members 120a and 120b in the bending direction. And a slide member 122 (drive member) for driving the first and second bending members 120a and 120b in the bending direction. The first and second bending members 120a and 120b are arranged between the first and second guide surfaces 123a and 123b and the slide member 122.

  (Operation and Effect 1) In order to satisfactorily bind the sheet P with the nonmetallic needle 2, it is necessary to bend the pair of needle legs 2b and 2c so as to overlap the crown 2a in parallel. In the conventional configuration in which the bending member is turned upward from below by rotating the bending member, the pressing member that presses the needle tip inward to deform the needle member and the escape (deformation) of the needle leg in the front-rear direction X are suppressed. However, there is a problem that the number of parts is large and the structure is complicated.

  Therefore, the first and second bending members 120a and 120b are configured to linearly protrude from the holes 116a and 116b of the pair of punching blades 36a and 36b. The first and second guide members 123a and 123b guide the first and second bending members 120a and 120b in the bending direction of the pair of needle legs 2b and 2c, that is, in the direction substantially parallel to the crown 2a. The second bending member 120a and the slide member 122 for driving the bending member 120b are arranged between the two bending members 120a and 120b.

  With this configuration, when the slide member 122 is operated, the first and second bending members 120a and 120b are guided by the guide surfaces 123a and 123b and move straight and project obliquely upward from the holes 116a and 116b. Thus, the pair of needle legs 2b and 2c are bent. Therefore, the pair of needle legs 2b and 2c can be bent substantially parallel to the crown 2a.

  Such a bending mechanism 38 having an excellent bending function can be realized only by disposing the first and second bending members 120a and 120b between the guide surfaces 123a and 123b and the slide member 122. Therefore, the stapler 1 that can reliably bend the needle legs 2b and 2c of the nonmetallic needle 2 with a small number of parts and a simple configuration can provide the stapler 1 that can reduce the cost. Further, the stapler 1 can be reduced in size and weight.

  (Configuration 2) The slide member 122 is configured to reciprocate in a direction (the front-rear direction X) intersecting with the insertion / removal direction (the vertical direction Z) of the pair of punching blades 36a and 36b, and the first and the second are performed by the forward operation. May have first and second operating portions 137a and 137b for pushing up the bending members 120a and 120b toward the pair of needle legs 2b and 2c. In this case, the pair of first and second bending members 120a and 120b may be pushed down by the first and second operating portions 137a and 137b by the return operation of the slide member 122. Alternatively, the pressing operation may be performed by another member such as a spring.

  (Function and Effect 2) With the above configuration, the first and second operating portions 137a and 137b can be smoothly moved in the bending direction by the slide member 122.

  (Configuration 3) Further, the slide member 122 is configured to reciprocate in a direction (the front-rear direction X) intersecting with the insertion / removal direction (the vertical direction Z) of the pair of extraction blades 36a, 36b, and the first operation is performed by the return operation. The distance between the second bending members 120a and 120b is increased, and the bent projections 124a and 124b projecting between the pair of cutting blades 36a and 36b of the first and second bending members 120a and 120b are replaced with a pair of cutting blades 36a. , 36b may have first and second actuation portions 137a, 137b for moving in a direction of exiting from the holes 116a, 116b.

  In this case, the space between the pair of first and second bending members 120a and 120b is reduced by the first and second operating portions 137a and 137b by the forward operation, and the holes 116a and 116a of the pair of punching blades 36a and 36b are reduced. A configuration in which the bent protrusions 124a and 124b are moved from the 116b in a protruding direction may be employed. Alternatively, the movement in the projecting direction may be performed by another member such as a spring.

  (Effect 3) With the above configuration, the first and second bending members 120a and 120b can be smoothly returned to the initial position by the slide member 122.

  (Configuration 4) The slide member 122 moves the first or second bending member 120a, 120b, and moves the second or first other bending member 120b, 120a via a predetermined phase difference. It may be a configuration.

  (Effect 4) According to the above configuration, the pair of needle legs 2b and 2c can be bent and stacked in order without interfering with each other, and a smoother bending operation can be performed.

  [About the connection structure and operation and effect of the link 18]

  (Structure 1) As described above, the stapler 1 of this embodiment has the operating handle 6 (operating member) that reciprocates by the operation of the operator, the link 18 that operates in response to the reciprocating operation of the operating handle 6, and the paper. And a bending mechanism 38 for bending the pair of needle legs 2b and 2c of the nonmetallic needle 2 penetrating through the sheet P along the sheet P. The bending mechanism 38 includes first and second bending members 120a and 120b for bending the pair of needle legs 2b and 2c inward as shown in FIGS. 42A to 42F, and first and second bending members 120a and 120b. And a slide member 122 (drive member) that drives The slide member 122 is connected to the link 18 and is configured to interlock with the operation of the operation handle 6 via the link 18. More specifically, the operation handle 6 and the bending mechanism 38 are connected by connecting the operation handle 6 and the link 18 by the link shaft 15 and connecting the slide member 122 and the link 18 by the shaft 26 (slider drive shaft). Can be linked via a link 18.

  (Operation and Effect 1) Here, if the operation handle 6 and the bending mechanism 38 are not mechanically connected and the bending mechanism 38 operates independently of the operation of the operation handle 6, for example, Even when the bending mechanism 38 does not return to the initial position due to the clogging of the metal needle 2 or the like, the operation handle 6 returns to the initial position normally. For this reason, the operator may continue the operation without noticing the malfunction of the bending mechanism 38, which may affect the operability and durability of the stapler 1.

  Therefore, the operation handle 6 and the slide member 122 of the bending mechanism 38 are mechanically connected by the link 18. With this configuration, the operation of the operation handle 6 and the operation and return operation of the bending mechanism 38 can be linked. Therefore, if any one of the operation failures occurs, the other predetermined operation is also affected via the link 18, so that the operator can reliably grasp the operation failure and respond quickly. Therefore, the durability and operability of the stapler 1 can be improved. Further, the stapler 1 having excellent durability and operability can be implemented at a low cost with a small number of parts and a simple configuration simply by connecting the operation handle 6 and the slide member 122 with the link 18.

  (Configuration 2) The driving member connected to the link 18 is a slide member 122 that reciprocates in response to the operation of the link 18, and the slide member 122 includes first and second bending members 120a and 120b. An inclined surface (first and second operating portions 137a, 137b) for guiding the needle legs 2b, 2c in the direction of bending may be provided.

  (Effect 2) With the above configuration, the slide member 122 performs the forward operation or the backward operation, so that the first and second bending members 120a are formed via the inclined surfaces (the first and second operating portions 137a and 137b). , 120b can be smoothly guided in the direction in which the needle legs 2b, 2c are bent.

  (Configuration 3) The pair of non-metallic needles 2 have a pair of punching blades 36a and 36b for penetrating the pair of needle legs 2b and 2c through the sheet P. May be provided with a penetrating mechanism 37 for performing the insertion / extraction operation of the extraction blades 36a and 36b. More specifically, by connecting the penetrating mechanism 37 and the link 18 by the link shaft 15, the penetrating mechanism 37 and the bending mechanism 38 can be interlocked via the link 18.

  (Effect 3) With the above configuration, the penetration operation of the penetration mechanism 37 driven by the operation handle 6, the bending operation of the bending mechanism 38, and the return operation thereof can be linked via the link 18, and Each operation can be executed at a suitable timing. Further, the operator can reliably grasp the operation failure caused by either the operation of the penetration mechanism 37 or the bending mechanism 38, and can promptly respond. Therefore, the durability of the penetration mechanism 37 and the bending mechanism 38 can be improved.

  (Configuration 4) A pusher 61 (transport member) for transporting the non-metallic needle 2 in a predetermined transport direction (front-rear direction X) is provided, and the link 18 interlocks with the reciprocating operation of the operation handle 6 to push the pusher 61. May be configured to reciprocate in the transport direction (front-back direction X). More specifically, when the link 18 pushes the shaft 25 (pusher drive shaft) inserted through the pusher 61 by the push protrusion 30, the pusher 61 reciprocates in the transport direction in accordance with the operation of the operation handle 6. Move.

  (Effect 4) With the above configuration, for example, while the operation of binding the sheet P by the penetrating mechanism 37 or the folding mechanism 38 is performed, the pusher 61 is retracted backward, and the penetrating mechanism 37 or the folding mechanism 38 Do not hinder operation. Then, by pushing the pusher 61 forward by the link 18 at the timing when the operation of binding the paper P is completed, a new nonmetallic needle 2 can be sent between the pair of punching blades 36a and 36b. Therefore, the penetrating operation, the bending operation, the transport operation of the non-metallic needle 2 and the returning operation thereof are linked by the link 18 and can be executed at a suitable timing. Further, in addition to the operation failure of the penetration mechanism 37 and the bending mechanism 38, the operation failure of the pusher 61 can be reliably grasped by the operator, and the operator can quickly respond. Therefore, the durability of the penetration mechanism 37, the bending mechanism 38, and the pusher 61 can be improved.

  Although the embodiment has been described in detail with reference to the drawings, the embodiment is merely an example. Therefore, the present invention is not limited only to the embodiment, and it is needless to say that the present invention is included in the present invention even if there is a design change or the like without departing from the gist. Further, for example, when a plurality of configurations are included in each embodiment, it is needless to say that possible combinations of these configurations are included even if not specifically described. Further, in the case where a plurality of embodiments and modifications are disclosed, it goes without saying that possible combinations of configurations that straddle these are included even if not specifically described. Further, it is needless to say that the configuration depicted in the drawings is included even if not particularly described. Further, when there is a term such as “etc.”, it is used to mean that it includes the equivalent. Further, when there is a term such as “substantially”, “about”, or “degree”, it is used in a sense that the term includes a range and accuracy recognized by common sense.

DESCRIPTION OF SYMBOLS 1 Stapler 2 Non-metallic needle 2b, 2b ', 2c Needle leg 3 Connecting needle 4 Hole 6 Operation handle (operation part)
7 Paper tray (paper tray)
11 Handle operation unit 18 Link 32 Transport path 34 Transport mechanism 35 Cutting and forming mechanism (cutting mechanism, forming mechanism, needle holding mechanism)
36, 36a, 36b Extraction blade 37 Penetration mechanism 38 Bending mechanism 61 Pusher (transport member)
81 positioning part 82 return part 84 needle holding part 85 abutment surface 86 engaging part 87 engaging member 88 detachment restriction part 91 first restriction part 92 needle pressing plate (needle pressing mechanism)
93 Second regulating portion 95 Clearance 96 Clearance 101 Cutting blade (cutting mechanism)
102 Molding member (Molding mechanism)
102a Arm part 105 Needle holding part 106 Elastic piece (engaging part)
113a, 113b Second penetration part (penetration part)
116a, 116b Hole 117 Drilling blade guide 117a First guide 117b Second guide 117c Chamfer 120a First bending member 120b Second bending member 123a, 123b Guide surface 122 Slide member (drive member)
137a First operating part (operating part, inclined surface)
137b Second operating part (operating part, inclined surface)
P paper (binding object)
X Front-back direction (transport direction)

Claims (5)

A forming mechanism for bending a non-metallic needle in a flat state to form a U-shape,
A needle holding mechanism for holding a needle leg of the non-metallic needle formed into a U-shape, wherein the U-shaped non-metallic needle is formed between the forming mechanism and the needle holding mechanism. In the stapler where the exchange is performed,
The forming mechanism and the needle holding mechanism are provided so as to be relatively movable with respect to the non-metal needle along a direction in which the non-metal needle is bent in a U-shape, and the forming mechanism and the needle holding mechanism are provided. Are provided so as to be movable relative to each other,
The forming mechanism is configured to bend the needle leg of the non-metallic needle in the moving direction by moving relative to the non-metallic needle and the needle pressing mechanism, and to bend the non-metallic needle to form a U-shape. Having a molded member to be molded into
The forming member extends substantially parallel to a direction in which the non-metallic needle is bent to form a U-shape, and holds the pair of needles of the non-metallic needle formed in a U-shape while bending the needle-leg. It has a pair of arm portions that
The pair of arms are elastically deformable in a direction of expanding and contracting the distance between each other, and the distance between the distal ends holding the distal ends of the pair of needle legs is formed in a U-shape. It is configured to be narrower than the interval between the pair of needle legs of the needle,
When the forming mechanism bends the non-metallic needle into a U-shape, the needle holding mechanism retracts to a position where it does not come into contact with the bent needle leg, and is bent to form the U-shaped non-metallic needle. A stapler configured to hold the needle leg of the non-metallic needle formed in a U-shape by relatively moving toward the non-metallic needle when receiving the needle. The stapler according to claim 1 ,
The needle holding mechanism is disposed via an insertion interval of the pair of needle legs of the non-metallic needle formed in a U-shape, and is relatively moved with respect to the non-metallic needle. Has a pair of needle holding parts that take in the inside and hold it,
The needle presser is configured to hold the tips of the pair of needle legs while the pair of arms hold the pair of needle legs when receiving the non-metallic needle from the forming mechanism. A stapler characterized by the following. 3. The stapler according to claim 1, wherein at least one of the needle holding mechanism and the forming mechanism is relatively movable integrally when the non-metallic needle is transferred between the forming mechanism and the needle holding mechanism. A stapler, characterized in that the stapler has an engaging portion for engaging the other. The stapler according to any one of claims 1 to 3 , further comprising a penetrating mechanism having a pair of extraction blades for penetrating the pair of needle legs of the non-metallic needle through a binding target,
The stapler, wherein the forming mechanism is provided integrally with the penetrating mechanism. The stapler according to any one of claims 1 to 4 , wherein the forming mechanism is housed relatively movably inside the needle holding mechanism.