JP4465495B2 - Non-metallic stitches such as paper for binding paper, a book bound by the stitch, a paper binding method, and a binding device therefor - Google Patents

Description

  The present invention relates to a non-metallic stitch mainly made of paper for binding sheets such as for bookbinding, a book bound with the non-metallic stitch, a method for binding sheets with the stitch, and a binding device thereof. Specifically, the present invention relates to a method of forming a binding tool called a stitch using, for example, paper as a raw material, and inserting the paper stitch into a paper constituting a book, and an apparatus therefor.

  For general books, weekly magazines, catalogs, etc., for example, in the case of saddle-stitched books, a substantially U-shaped wire (or metal) stitch is penetrated from the back side of the collated paper, and the penetrating part is inserted. It is bound and bound with a cover and a cover. These books are disposed of as garbage after use, or used as recycled paper raw materials. At that time, the metal stitches are removed and separated into metal and paper. .

However, the separation work that separates the metal stitches from the paper must be done manually, and the post-use processing is very labor-intensive and costly, which is labor-saving. Together, this increases the cost of recycled paper. A paper file binding tool is known from Patent Documents 1 to 3, etc., but there is no paper stitch.
JP-A-2005-14406 Registered Utility Model No. 3099092 JP 2003-246180 A

  Therefore, the present invention has a problem that it is not necessary to separate paper and metal (stitch) when it is disposed of as waste or used as a raw material for recycled paper, and a book such as a book is left intact. Can be discarded or used as a raw material for recycled paper, that is, non-metallic such as paper that can be used as raw material for recycled paper, or incinerated or landfilled with general paper waste with stitches attached A binding needle (hereinafter also referred to as a stitch), a sheet binding method using the stitch, and a sheet binding apparatus.

  The structure of the non-metallic stitch of the present invention made for the purpose of solving the above-mentioned problem is that the non-metallic wire material such as paper hardened by application or impregnation of a cured adhesive component such as an adhesive is substantially U-shaped. A pair of insertion legs is formed by bending it into a shape, and the insertion legs are supported by a needle-shaped guide body to penetrate a plurality of sheets of paper, and the insertion legs that have penetrated are bent and bonded to the sheet by an adhesive. It is characterized by the fact that it has been allowed to.

  Next, the structure of the book bound using the above-described stitches according to the present invention is a pair of insertion legs formed by bending a non-metallic wire material such as hardened paper into a substantially U shape. Is bent through a required number of sheets printed, and the bent portion is fixed to the sheet.

  Furthermore, the configuration of the binding method of the present invention for binding a plurality of sheets with the above-described stitches of the present invention is that the both ends of a non-metallic wire such as paper hardened by applying or impregnating an adhesive are bent downward and substantially aligned. The stitch formed with the insertion leg in a letter shape is supported by the needle-shaped guide body, and the guide body is passed through the stitch insertion hole formed in the paper by the guide body together with the guide body. , And the portions of the insertion leg protruding from the paper are bent inward and fixed to the paper with an adhesive.

  And, the configuration of the binding device of the present invention for binding the above-described stitches of the present invention to a sheet includes a stitch cradle for holding the stitches of the present invention in a horizontal posture, a paper cradle for supporting the paper bound by the stitches, A lifting head that moves up and down with respect to the stitch cradle and the paper cradle, and the lifting head bends both sides of the stitch on the stitch cradle when the head moves toward the stitch cradle. Two parallel stitch guide bodies having a perforating blade at the tip fixed to the lifting head for forming and punching a stitch insertion hole in the paper on the paper receiving base, and the lifting head moved to the stitch receiving base When the stitch is pressed onto the stitch cradle and the insertion leg of the stitch is pushed into the stitch insertion hole, it is positioned between the stitch guide bodies and slides on the lifting head. A pusher provided on the lower surface of the paper cradle, and a bending mechanism for the insertion leg that bends the insertion leg of the stitch that is inserted on the lower surface side of the paper cradle to the paper side. The stitch cradle is retracted when pushed into the insertion hole.

  Since the stitch of the present invention is made of paper and is made of the same material as the paper to be bound by it, there is no need to separate it from paper when it is reused, incinerated, discarded, etc. Can be sent to each process as it is. That is, a book bound with the stitches of the present invention can be handled as incinerated or landfilled with general paper waste or as recycled paper raw material with the stitches attached since the stitches are made of non-metal.

  Further, in the stitch according to the present invention, since the folded insertion leg is bonded to the paper with an adhesive or the like and the paper is bound, the non-metallic stitch is not easily detached from the paper and a strong binding state can be realized.

  Furthermore, the stitch of the present invention is bent at both ends to form a downward U-shaped insertion leg, and when the leg is passed through the paper, the stitch guide body forms a stitch insertion hole at the same time as the insertion. Since the legs are passed through the stitch insertion holes, the paper can be surely penetrated even if the mechanical strength of the stitch does not have the mechanical strength like that of a wire stitch.

  Next, embodiments of the present invention will be described with reference to the drawings. In the accompanying drawings, FIG. 1 is a perspective view showing an example of a book that is saddle-stitched by the stitches of the present invention, FIG. 2 is an enlarged sectional view around the stitches of the present invention along the line 2-2 in FIG. FIG. 4 to FIG. 9 are explanatory views showing a binding process using the stitches of the present invention, and FIG. 10 shows an outline of a binding device that operates based on the binding method shown in FIGS. It is sectional drawing.

  As illustrated in FIG. 1, the book bound by the stitch of the present invention is bound by the stitch 20 of the present invention stitching a portion that becomes a fold line 11 formed by overlapping a large number of papers 10 such as plain papers, and as an example, a saddle-stitched book. Form.

  The stitch 20 of the present invention uses a papermaking material formed by twisting Japanese paper, but in addition to the twisted Japanese paper, fiber paper, biodegradable plastic, etc. are formed on a linear member, and the load on the environment is the same as that of the paper 10 It can also be formed of the same level of wire.

  The stitches 20 formed from papermaking material or vulcanized fiber paper can be incinerated in the same way as plain paper, and no harmful substances remain behind. Moreover, since the stitches 20 made of biodegradable plastic are decomposed by underground bacteria together with the bound paper 10, when the landfill process is performed, the environmental load is extremely low.

  The stitch 20 may also be formed from fiber paper, such as vulcanized fiber paper. As an example, an adhesive material such as an adhesive is applied to or impregnated on the surface of plant-based parchment paper such as vulcanized fiber paper having a thickness of about 0.35 to 0.5 mm manufactured by Hokuetsu Paper Co., Ltd. and dried. There is one which is cured and formed by cutting this paper into a width of about 0.2 mm to 1.0 mm, and this makes it possible to obtain a stitch of the present invention having desirable characteristics.

  Vulcanized fiber paper is treated with zinc chloride solution to make paper into parchment paper, and has various properties such as good processability, excellent impact resistance, wear resistance and insulation. . Not all the reasons why paper changes like this have been elucidated. In the case of plain paper, hydrogen bonds work between the fibers that make up the paper, giving the paper strength, but the number of hydrogen bonds is increased by the zinc chloride solution treatment. Inferred.

  Such vulcanized fiber paper is widely used for abrasive base materials, electrical insulating materials, aluminum foil cutting blades, and the like, and as described in Patent Documents 1 to 3 and the like, a file binding tool It is also used as.

  As shown in FIG. 2, the stitch 20 of the present invention has a plurality of paper penetrating portions 21 and 21 (see FIGS. 4 and 5) formed by right and left insertion legs formed in a substantially bowl shape on both sides as shown in FIG. The laminated paper 10 passes through the stitch insertion hole 12 drilled in the paper 10 from the outer surface side (the lower side of the figure, the back side of the book) to the inner surface side, and is bent on the opposite surface (inner surface) of the paper 10. is there. Then, by penetrating through portions 21 and joining the overlapping portions, stitches 20 are formed in a ring and a plurality of sheets 10 are bound. In other words, the penetration portion 21 protruding from the inner surface of the paper 10 to which the stitch 20 is bound is joined by using a cured adhesive component such as an adhesive applied or impregnated thereto, thereby increasing the binding strength or binding strength. The cured adhesive component used in the present invention is preferably glue or glue derived from natural materials, but other materials such as synthetic resins can also be used.

  In the stitch 20 of the present invention, fiber paper such as vulcanized fiber paper is coated with an adhesive or impregnated and dried, so that it can be adhered in a state where the portions protruding from the paper and bent are overlapped. In the embodiment of FIG. 2, the connecting portion 22 that connects the penetrating portion 21 on the opposite surface (back side of the book) of the paper 10 is also bonded to the back surface of the paper 10 to further increase the binding strength or binding strength.

  4 to 9 schematically show an example of the saddle stitch bookbinding process for the paper 10 laminated using the stitch 20 of the present invention described above.

  For example, as shown in FIG. 4, bookbinding using the stitches of the present invention places flat paper stitches 20 on a stitch cradle 40 and has two stitch guide bodies 32 a and 32 b that are parallel in a vertical posture. Deploy.

  Here, the stitch guide bodies 32a and 32b are formed as pipe-shaped cylinders, and at the lower ends of the stitch guide bodies 32a and 32b, inwardly edged perforated blades 33a and 33b are formed. Yes. Further, the opposing wall surfaces of both stitch guide bodies 32a and 32b are formed with longitudinal groove-shaped notches 34a and 34b that are cut open and reach the lower end blades 33a and 33b. The width of the groove-shaped notches 34a and 34b, that is, the width of the groove is larger than the width (thickness) of the paper stitch 20 to be used.

  Next, the stitch guide bodies 32a and 32b are lowered. When lowered, both end portions of the paper stitch 20 are bent downward by the edge portions of the punching blades 33a and 33b of the stitch guide bodies 32a and 32b, and left and right insertion legs are formed as the through portions 21 and 21, respectively. The penetrating portions 21 and 21 enter the inside of the guide bodies 32a and 32b from the groove-shaped notches 34a and 34b of the stitch guide bodies 32a and 32b, and are located at the back of the notches 34a and 34b in the guide bodies 32a and 32b. Pressed against the wall. As a result, the paper stitch 20 is formed into a downward U-shaped stitch having left and right insertion legs as the through portions 21 and 21. At this time, since the stitch 20 is carried on the stitch cradle 40 as shown in FIG. 5, the stitch 20 can be bent easily.

  In this way, the left and right portions of the paper stitch 20 are bent to form the insertion leg, and after the penetration portions 21 and 21 are formed by the insertion leg, the stitch guide bodies 32a and 32b are further lowered, The lower end portions of the stitch guide bodies 32a and 32b abut on the paper 10.

  On the other hand, before the stitch guide bodies 32a and 32b are lowered, the paper 10 is collated in advance and folded in two so that the folded fold is positioned directly below the connecting portion 22 of the paper stitch 20. These are arranged below the stitch guide bodies 32a and 32b.

  When the stitch guide bodies 32a and 32b descend in the above manner, first, the tips of the punching blades 33a and 33b of the stitch guide bodies 32a and 32b reach the paper 10. In synchronism with this arrival, the stitch receiving base 40 slides back to the back side of the paper surface in the figure, and the punching blades 33a and 33b are lowered as they are to punch the paper 10. As shown in FIG. 6, the stitch guide bodies 32a and 32b are formed so that the front end side of the paper stitch 20 having the through portions 21 and 21 by insertion legs bent in a downward U-shape, that is, the through portions 21 and 21 are paper. 10 is inserted into the stitch insertion hole 12 perforated in 10. When the stitch 20 is inserted into the paper 10, the stitch guide bodies 32a and 32b are raised as shown in FIG.

  Then, the stitch crimping bodies 52a and 52b bend the through portions 21 and 21 of the paper stitch 20 inward as shown in FIG. The stitch crimping bodies 52a and 52b are arranged along the fold line 11 of the paper 10 and on the lower surface of the paper 10, and are formed so as to be rotatable about the shafts 53a and 53b. When the stitch guide bodies 32a and 32b are lifted, the stitch crimping bodies 52a and 52b rotate in opposite directions to each other, and the crimping surfaces 54a and 42b protrude from the stitch insertion holes 12 drilled in the paper 10, As shown in FIG. 2, 21 are overlapped with each other and bent inward. As a result, the paper 10 is bound by the stitch 20 formed in a horizontally long ring shape as shown in FIG.

  In the present invention, when the penetrating portions 21 and 21 of the stitch 20 are bent, the stitch 20 may be heated by a heater incorporated in the stitch guide bodies 32a and 32b, a paper tray that carries the paper 10, or the like. The thermosetting adhesive impregnated with or applied to the stitch 20 causes the entire stitch 20 or the penetrating portions 21 and 21 to be fixed to the paper 10, and firmly binds the paper 10 with the stitch 20. As the adhesive, a material that does not cause harmful substances even after incineration or does not remain behind and can be disposed of together with the paper 10 is used.

  FIG. 10 exemplifies a configuration of a binding device for binding sheets 10 stacked using the stitch 20 of the present invention described above into a saddle stitch book as an example.

  In FIG. 10, as an example, a block 30 is formed as an elevating head, 40 is a paper stitch cradle disposed below the head 30, and 50 is a paper 10 cradle disposed below the stitch cradle 40. Each is shown.

  The raising / lowering head 30 is hold | maintained and arrange | positioned at the main body (not shown) of the binding apparatus so that raising / lowering is possible. The head body 31 of the elevating head 30 is provided with two paper stitching guide bodies 32a and 32b each having a perforating blade 33a and 33b at the tip thereof, fixed in a vertically embedded manner.

  The guide bodies 32a and 32b are formed of thin pipe-shaped cylinders, and inwardly-shaped edge-shaped perforated blades 33a and 33b are formed at lower ends of the guide bodies 32a and 32b. The opposing wall surfaces of both guide bodies 32a and 32b are formed with groove-shaped notches 34a and 34b that are cut open and reach the lower end blades 33a and 33b. Here, a pipe-shaped cylinder is used in which the width of the groove-shaped notches 34a and 34b, that is, the width of the groove is larger than the width (thickness) of the paper stitch 20 to be used.

  Reference numeral 35 denotes a block-shaped pusher disposed between the two guide bodies 32a and 32b. The upper end of the pusher 35 is coupled to the rod 36, and the rod 36 moves up and down in a manner that penetrates the head body 31. The head main body 31 holds the head 30 so that the head 30 can be lifted and lowered independently of the lifting and lowering of the head 30. Further, the rod 36 is provided with a coil spring 37 fitted into the rod 36 between the upper surface of the pusher 35 and the lower surface of the head main body 31, so that the pusher 35 is always urged downward. Like to do.

  The stitch receiving base 40 positioned below the guide bodies 32a and 32b and the pusher 35 is attached to the apparatus main body by a pneumatic cylinder or the like so that it can be retracted immediately below the pusher 35 in the front-rear direction, for example, rearward with respect to the paper surface of FIG. Has been.

  The sheet receiving base 50 disposed below the stitch receiving base 40 is disposed as a part of the apparatus main body almost directly below the receiving base 40 of the paper stitch 20. A bending mechanism for the insertion leg is incorporated in the paper receiving tray 50. For this reason, the paper receiving tray 50 is provided with slits 51 extending along the folds of the paper 10 placed thereon, and the crimping bodies 52 a and 52 b of the paper stitch 20 are inside the slit 51. They are arranged in a line along the fold line 11. These stitch crimping bodies 52a and 52b are plate-like, and are supported by the paper receiving base 50 so as to rotate around the shafts 53a and 53b. The crimping surfaces 54a and 54b shown by solid lines in FIG. Rotates between two positions: a standby position that becomes and an operating position that is in a substantially horizontal state indicated by a two-dot chain line. The rotation is performed by an electromagnetic solenoid, for example. In addition, a heater (not shown) is incorporated inside each stitch crimping body 52a, 52b so that the crimping surfaces 54a, 54b can be heated by the heater.

  The operation state of the binding device of the present invention will be described with reference to FIGS. First, the flat paper stitch 20 is placed on the stitch cradle 40 (see also FIG. 4). The paper stitch 20 described below can be replaced with one made of biodegradable plastic.

  Next, the pusher 35 integral with the rod 36 is lowered together with the head main body 31, and the pusher 35 is brought into contact with the paper stitch 20 on the stitch receiving base 40.

  When the head body 31 is further lowered, the pusher 35 and its rod 36 are prevented from being lowered by the stitch receiving base 40, so that only the head body 31 is further lowered. When the position of the pusher 35 and its rod 36 is left as they are, and only the head main body 31 is lowered, both end portions of the paper stitch 20 that are not sandwiched between the pusher 35 and the stitch receiving base 40 are perforated by the stitch guide bodies 32a and 32b. The left and right insertion legs are formed as penetrating portions 21 and 21 by being bent downward by the edge portions of the blades 33a and 33b (see also FIG. 5).

  The penetrating portions 21 and 21 formed by the inserted insertion legs formed as the elevating head 30 is lowered as described above are formed from the groove-shaped notches 34a and 34b of the stitch guide bodies 32a and 32b. It enters the inside and is pressed against the wall surface located behind the notches 34a and 34b in the guide bodies 32a and 32b. As a result, the paper stitch 20 is formed into a downward U-shaped stitch provided with the left and right insertion legs as the through portions 21 and 21 (see also FIG. 5).

  In this way, the left and right portions of the paper stitch 20 are bent to form the insertion leg, and when the through portions 21 and 21 are formed by the insertion leg, the head body 31 is further lowered together with the stitch receiving base 40. To do. When the lower ends of the stitch guide bodies 32a and 32b come into contact with the paper 10 due to this descending, the stitch receiving base 40 escapes to the back side of the paper surface of the drawing at the same time, but the pusher 35 and its rod 35 remain together with the head body 31 as they are. Descend.

  On the other hand, the paper 10 on the receiving base 50 is collated in advance and folded in two before the head body 31 is lowered, and the folded fold 11 is connected to the paper saddle stitch stitch 20. The crease 11 is placed in a direction along the left-right direction of the drawing on a sheet receiving base 50 positioned directly below the section 22 and disposed below the stitch receiving base 40.

  When the elevating head 30 is lowered as described above and the tips of the punching blades 33a and 33b of the stitch guide bodies 32a and 32b reach the paper 10, the stitch receiving base 40 is placed on the back side of the paper surface in the drawing in synchronization with this arrival. Since the sliding slide is performed, the punching blades 33a and 33b are lowered and enter the slit 51 in the paper receiving tray 50 while punching the paper 10 (see also FIG. 6). As a result, the leading end side of the paper stitch 20 having the penetrating portions 21 and 21 by the insertion leg bent in a downward U-shape, that is, the penetrating portions 21 and 21 are fitted into the stitch insertion holes 12 formed in the paper 10. When the elevating head 30 is lowered to the stroke end, the connecting portion 22 of the paper stitch 20 is pressed against the paper 10 (see also FIG. 7).

  After the above-described crimping, the stitch guide bodies 32a and 32b return to the original positions upward, the stitch crimping bodies 52a and 52b rotate, and the crimping surfaces 54a and 54b are mutually inside the through portions 21 and 21 of the paper stitch 20. (See FIG. 8). At the same time, the adhesive with the heated crimping surfaces 54a and 54b applied or impregnated on the stitch 20 is cured, the entire stitch 20 is bonded to the paper 10, and the paper 10 is bound by the stitch 20 (see FIG. 9). The stitch 20 can be bonded to the paper 10 even if a heater is incorporated in the paper cradle 50 so that the part corresponding to the fold 11 of the paper 10 in the paper cradle 50 and the part corresponding to the stitch 20 generate heat. Note that, as described above, an adhesive that does not generate harmful substances even after incineration or does not remain behind and can be disposed of together with the paper 10 is used.

  As described above, when the paper stitch 20 is inserted into the paper 10, the binding device of the present invention pierces the stitch insertion hole 12 in the paper 10 preceded by the edge-shaped punching blades 33a and 33b of the guide bodies 32a and 32b. Then, since the penetrating portions 21 and 21 of the paper stitch 20 are inserted into the perforated holes, the paper stitch 20 can be smoothly and reliably passed through the paper 10, and the stitch 20 is bonded to the paper 10. Therefore, the paper 10 can be bound firmly.

  In the embodiment described above, the paper stitch 20 is formed of a paper casing or vulcanite fiber paper, but may be formed of fiber paper such as other plant parchment paper.

  In the bookbinding, the paper stitch 20 is inserted from the back of the saddle stitch book. After the stitch 20 is passed from the inner surface of the paper to be the fold 11 of the paper 10 toward the back of the book, the penetrating portions 21 and 21 are inserted. May be bent.

  The paper stitch 20 has a ring shape in which the penetrating portions 21 and 21 overlap and are joined to each other when the paper 10 is bound, but the penetrating portions 21 and 21 are similar to a normal wire stitch. It is also possible to adopt a configuration in which the end portion that has slipped out from the paper 10 is adhered to the paper 10 in a state of being separated.

  Furthermore, in the binding device, the penetrating portion 21 of the paper stitch 20 is bent by the rotation of the stitch crimping bodies 52a and 52b, but after the paper stitch 20 is inserted into the paper 10, the paper stitch 20 is The paper 10 may be lowered from the cradle 50 while being inserted, the penetrating portions 21 and 21 of the paper stitch 20 may be bent using a tool or the like, and the bent penetrating portions 21 and 21 may be bonded to each other.

  The present invention is as described above, and, as an example, a wire rod mainly composed of paper obtained by applying or impregnating a curing material that exhibits adhesiveness by heat, and drying the binding needle, which has conventionally been a metal wire shape. As a stitch, a non-metallic needle (stitch) formed to the required length is used, so the book bound with this binding needle can be rotated for recycling without being separated without being separated, or discarded. Therefore, it is very convenient in handling of the stapled book and saddle stitched book after use.

The perspective view which shows an example of the book which carried out the saddle stitch by this invention stitch. FIG. 2 is an enlarged cross-sectional view around the stitch of the present invention taken along line 2-2 in FIG. 1. The top view which follows the 3-3 line of FIG. Explanatory drawing which shows the 1st process of the binding process using this invention stitch. Explanatory drawing which shows the 2nd process of the binding process using this invention stitch. Explanatory drawing which shows the 3rd process of the binding process using this invention stitch. Explanatory drawing which shows the 4th process of the binding process using this invention stitch. Explanatory drawing which shows the 5th process of the binding process using this invention stitch. Explanatory drawing which shows the 6th process of the binding process using this invention stitch. Sectional drawing which shows the outline | summary of the binding apparatus which operate | moves based on the binding method shown in FIGS.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Paper 11 Paper crease 12 Paper stitch insertion hole 20 Stitch 21 Stitch penetration part 22 Stitch connection part 30 Lifting head 31 Head body 32a, 32b Stitch guide body 33a, 33b Perforated blade 34a, 34b Groove notch 35 Pusher 36 Rod 37 Coil spring 40 Stitch base 50 Paper base 51 Slit 52a, 52b Stitch crimp body 53a, 53b Rotating shaft 54a, 54b Crimp surface

Claims (15)

A linear member formed by linearly forming paper or biodegradable plastic hardened by application or impregnation of an adhesive is bent into a substantially U shape to form a pair of insertion legs, and the insertion legs are A non-metallic stitch characterized in that it is supported by a needle-shaped guide body and penetrates a plurality of sheets to be bound, and the insertion leg that penetrates is bent and joined to the sheet by an adhesive.   The stitch according to claim 1, wherein the paper wire is made of plant-based parchment paper.   The stitch according to claim 1, wherein the paper wire is formed of vulcanized fiber paper.   The stitch according to claim 3, wherein the paper wire is formed by cutting a vulcanized fiber paper having a thickness of 0.2 mm to 1.0 mm into a width of 0.2 mm to 1.0 mm.   The stitch according to claim 1, wherein the paper wire is formed by twisting Japanese paper. Characters and figures were printed on a pair of insertion legs formed by bending a linear member formed by linearly forming paper hardened by applying or impregnating adhesive or biodegradable plastic into a linear shape . A book bound by a non-metallic stitch, which is folded through a required number of sheets to be bound and fixed at the folded portion.   The book according to claim 6, wherein the books are collated with the sheets open, and the stitches bind the folds in the middle of these sheets.   The book according to claim 6 or 7, wherein the stitches are formed in a ring shape by bending the insertion legs so as to overlap each other.   The book according to any one of claims 6 to 8, wherein the stitch is formed of a linear member made of plant-based parchment paper or vulcanized fiber paper, or a paper sheet made by twisting Japanese paper. Non-metallic stitches with insertion legs formed in an approximately U-shape by bending both ends of a linear member formed by linearly forming paper or biodegradable plastic hardened by applying or impregnating adhesive The insertion leg is supported by a needle-shaped guide body and passed through the stitch insertion hole formed in the paper by the guide body together with the guide body, and then the guide body is removed and the insertion leg protrudes from the paper. A method for binding sheets, wherein the portions are folded inward and fixed to the sheet with an adhesive.   The binding method according to claim 10, wherein the stitch is formed by a paper member made of twisted linear members or Japanese paper made of plant-based parchment paper or vulcanized fiber paper. Stitch cradle for holding a linear member formed by linearly forming paper or biodegradable plastic that has been hardened by application or impregnation of an adhesive in a horizontal position, and paper receiver that supports the paper bound by the stitch. And a lift head that moves up and down relative to the stitch cradle and the paper cradle. When the lift head moves toward the stitch cradle, both sides of the stitch on the stitch cradle are bent and inserted. Two parallel stitch guide bodies each having a perforation blade fixed to the elevating head for forming the insertion leg and perforating a stitch insertion hole in the paper on the paper cradle, and the elevating head serving as the stitch cradle The stitch is pressed onto the stitch base and the insertion leg of the stitch is pushed into the stitch insertion hole, and is positioned between the stitch guide bodies to slide the lifting head. A pusher provided so as to be able to hold, and a bending mechanism of an insertion leg that bends the insertion leg of the stitch inserted into the lower surface side of the paper receiving base to the paper side, and the insertion leg is A sheet binding device, wherein the stitch receiving base is retracted when being pushed into the stitch insertion hole.   The binding according to claim 12, wherein the stitch cradle, the paper cradle, and the lift head are arranged in a line along a vertical line, and the stitch cradle is retracted when the lift head moves toward the paper cradle. apparatus.   The bending mechanism of an insertion leg has a pair of stitch crimping bodies incorporated in the lower surface side of the paper receiving base in order to rotate toward a paper and bend | fold two insertion legs. Binding device.   The binding device according to any one of claims 12 to 14, wherein the paper base includes a heater for curing the thermosetting adhesive applied or impregnated into the stitches.

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