Method for manufacturing a stitchless binding portion

Abstract

To improve binding force more in comparison with a case where positions of whole convex parts for binding are dispersed.SOLUTION: A method, which manufactures a needle-less binding part (U3b) that has a first binding part (1) having a plurality of concaves and convexes and a second binding part (2), arranged to oppose to the first binding part (1), which has concaves and convexes which fit to the concaves and convexes of the first binding part (1) and binds media (S) to each other while making the first binding part (1) and the second binding part (2) sandwich the media (S) in a thickness direction of the media (S), executes a formation step of forming the binding parts (1 and 2), a first adjustment step of adjusting positions of convex parts (12 and 22) of the binding parts (1 and 2) by pressing the convex parts (12 and 22), and a second adjustment step of adjusting the convex parts (12 and 22) having the positions adjusted in the first adjustment step, by pressing portions of the convex parts (12 and 22) whose number is smaller than that of portions thereof in the first adjustment step.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a stitchless stitching portion that stitches a bundle of papers or the like without using a sewing needle.

Background Art

[0002] Regarding a stitchless stitching portion that stitches a bundled paper or the like without using a sewing needle, that is, a so-called stitchless stapler, the techniques described in the following Patent Documents 1 to 3 have been conventionally known.

[0003] Patent Document 1 (Japanese Patent Application Laid-Open No. 2017-185785) describes a stitching unit (50) that sandwiches and stitches paper between an upper tooth (540) and a lower tooth (550) that mesh with each other. The convex portions (541, 551) of each tooth (540, 550) in Patent Document 1 are along the surface of the paper formed in a shape having a flat top surface (541a, 551a), a side surface (541b, 551b) that is an inclined surface, a first side surface (542b, 552b) extending in the paper thickness direction, and a bottom surface (542a, 552a) along the surface of the paper. Also described is a configuration in which the portions of the top surface (541a, 551a) and the side surface (541b, 551b) that is an inclined surface are formed in a convex curved surface shape. In Patent Document 1, all the convex portions (541, 551) are formed in the same shape.

[0004] Patent Document 2 (Japanese Patent Application Laid-Open No. 2018-158796) discloses, in a stitching unit (51) that sandwiches and stitches paper between an upper pressing member (83A) and a lower pressing member (83B), a configuration in which the shape of the teeth of the lower pressing member (83B) is composed of teeth formed by five protruding portions (91) with pointed tips and trapezoidal protruding portions (92) with the tip portions cut off at both outermost ends. Patent Document 2 also describes a configuration in which a middle protruding portion (95) having a protruding amount smaller than that of the protruding portion (91) and larger than that of the trapezoidal protruding portion (92) is arranged between the protruding portion (91) and the trapezoidal protruding portion (92).

[0005] Patent Document 3 (Japanese Patent Application Laid-Open No. 2018-158807) discloses a binding unit (51) that binds paper by sandwiching it between an upper pressing member (83A) and a lower pressing member (83B). The tooth shape of the lower pressing member (83B) is such that the tooth is composed of high protrusions (42B) with pointed tips and large protrusion amounts, and low protrusions (42A) with pointed tips and small protrusion amounts are formed at both ends of the tooth.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0007] The technical problem of the present invention is to improve the binding force compared to the case where the positions of the convex portions for binding are scattered.

Means for Solving the Problems

[0008] In order to solve the above technical problem, the method for manufacturing a stitchless binding portion according to claim 1 of the present invention is a method for manufacturing a stitchless binding portion that has a first binding portion having a plurality of concavities and convexities, and a second binding portion that is disposed opposite to the first binding portion and has concavities and convexities that fit with the concavities and convexities of the first binding portion, and sandwiches a medium in the thickness direction of the medium between the first binding portion and the second binding portion to bind the media together, a mold forming step of forming each of the binding portions with a mold, A first adjustment step of pressing the convex portions of each fastening part taken out from the mold before the mold forming step and adjusting the position of the convex portions in the arrangement direction which is the direction in which the unevenness is arranged side by side; A second adjustment step of pressing a part of the convex portion with a contact area smaller than that of the first adjustment step against the convex portion whose position has been adjusted in the first adjustment step to adjust the outer shape of the convex portion; Execute together with After the type forming step and before the first adjustment step, execute a step of pressing a portion on the opposite side of the portion with unevenness in the central portion in the arrangement direction of the plurality of unevennesses in each binding portion to warp the portion with unevenness It is characterized by the above.

[0009] Claim 2 The invention according to claim 13 is Claim 1 In the method for manufacturing a non-needle fastening part described in claim 15, After the warping step and before the first adjustment step, a step of processing so that the opposite part becomes flat; It is characterized by executing.

[0010] In order to solve the above technical problem, the method for manufacturing a stitchless binding portion of the invention according to claim 3 is A method for manufacturing a stitchless binding portion having a first binding portion having a plurality of unevennesses and a second binding portion disposed opposite to the first binding portion and having unevennesses that fit with the unevennesses of the first binding portion, wherein the first binding portion and the second binding portion sandwich a medium in the thickness direction of the medium and bind the media together, A type forming step of forming each binding portion with a mold A first adjustment step of pressing the convex portions of each binding portion that has been subjected to the type forming step and taken out of the mold to adjust the position of the convex portions in the arrangement direction, which is the direction in which the unevennesses are arranged side by side A second adjustment step of pressing a part of the convex portion with a contact area smaller than that of the first adjustment step against the convex portion whose position has been adjusted in the first adjustment step to adjust the outer shape of the convex portion while executing It is characterized in that a mold recessed so that the convex portion at the center in the arrangement direction of the plurality of unevennesses protrudes most is used, and a forming step of forming each binding portion with the recessed mold is executed.

[0011] The invention according to claim 39 is, in the method for manufacturing a non-needle fastening part according to any one of claims 1 to 3, The convex portion formed in the mold forming step has a first inclined surface and a second inclined surface on the base end side of the first inclined surface, In the first adjustment step, a first mold for adjustment that adjusts the position of the convex portion contacts the first inclined surface and the second inclined surface of the convex portion formed in the mold forming step, In the second adjustment step, among the convex portions that contact the first mold after the first adjustment step, the convex portion that contacts the first mold has the first inclined surface contacting a second mold for adjustment that adjusts the outer shape of the convex portion, and the second mold does not contact the second inclined surface. This is a feature.

[0012] The invention according to claim 5 is a method for manufacturing a stitchless binding part according to claim 4, wherein the first inclined surface and the second inclined surface of the convex portion formed in the mold forming step are continuous, and in the first adjustment step, the first mold contacts a bending region where the first inclined surface switches to the second inclined surface.

[0013] The invention according to claim 6 is a method for manufacturing a stitchless binding part according to any one of claims 1 to 5, wherein in the second adjustment step of adjusting the outer shape of the portion where force is applied when stitching at the convex portion of the binding part adjusted in the second adjustment step by adjusting the outer shape of the first inclined surface on the tip side of the convex portion whose position is adjusted in the first adjustment step. is executed.

[0014] The invention according to claim 7 is a method for manufacturing a stitchless binding part according to claim 6, wherein the inclination of the second inclined surface on the base end side is steep with respect to the first inclined surface on the tip side of the convex portion of the binding part. This is a feature.

[0015] The invention according to claim 8 is a method for manufacturing a stitchless binding part according to any one of claims 1 to 7, wherein in the first adjustment step and the second adjustment step, the adjustment mold contacts the inclined surface of the convex portion. do This is a feature.

Effect of the Invention

[0016] According to the invention described in claim 1, the stitching force can be improved as compared with the case where the positions of the entire convex portions for stitching are scattered. Claim 2 According to the invention described in, it is possible to facilitate the adjustment in each adjustment step as compared with the case where it is not processed flat. According to the invention described in claim 3, the binding force can be improved as compared with the case where the positions of the entire convex portions for binding are scattered. According to the invention described in claim 4, in the first adjustment step, while adjusting the position of the convex portion by pressing the first inclined surface and the second inclined surface, the position of the convex portion can be adjusted without contacting the second inclined surface in the second adjustment step.

[0017] According to the invention described in claim 5, the bending regions of the first inclined surface and the second inclined surface can be adjusted in the first adjustment step. According to the invention described in claim 6, compared with the case where the outer shape of the base end portion of the convex portion is not adjusted, the base end portion that applies a force to the medium during binding can be adjusted with high precision. According to the invention described in claim 7, it has a steep inclination, and the outer shape of the base end portion that applies a force to the medium during binding can be adjusted. According to the invention described in claim 8, compared with the case where the mold used in the first adjustment step or the second adjustment step contacts the tip of the convex portion, deformation such that the tip is crushed by the pressure due to the adjustment is suppressed.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

DETAILED DESCRIPTION OF THE INVENTION

[0019] Next, with reference to the drawings, an example as a specific example of an embodiment of the present invention will be described, but the present invention is not limited to the following examples. For ease of understanding the following description, in the drawings, the front-rear direction is the X-axis direction, the left-right direction is the Y-axis direction, and the up-down direction is the Z-axis direction. The directions or sides indicated by the arrows X, -X, Y, -Y, Z, -Z are the front, rear, right, left, upper, lower, or front side, rear side, right side, left side, upper side, lower side, respectively. In addition, in the drawings, those with "·" in "○" mean arrows from the back to the front of the paper surface, and those with "×" in "○" mean arrows from the front to the back of the paper surface. In the description using the following drawings, for ease of understanding, illustrations other than the members necessary for the description are appropriately omitted.

EXAMPLE

[0020] (Description of the overall configuration of the printer U of Example 1) FIG. 1 is an overall explanatory diagram of the image forming apparatus of Example 1. In FIG. 1, as an example of the image forming apparatus according to Embodiment 1 of the present invention, a printer U includes a printer main body U1, a feeder unit U2 as an example of a supply device that supplies a medium to the printer main body U1, an operation unit UI for a user to perform operations, and a finisher U3 as an example of a post-processing device that performs post-processing on the medium discharged from the printer main body U1.

[0021] (Description of the Marking Configuration of Embodiment 1) In FIG. 1, the printer main body U1 includes a control unit (an example of a control means) C that controls the printer U, and a communication unit (not shown) that receives image information transmitted from a print image server COM as an example of an information transmission device connected to the outside of the printer U via a dedicated cable (not shown). The printer main body U1 also includes a marking unit U1a as an example of a recording means for recording an image on a medium. The print image server COM is connected via a cable or a line such as a LAN (Local Area Network), and a personal computer PC is connected as an example of an image transmission device that transmits information of an image to be printed by the printer U. The marking unit U1a includes photoreceptors Py, Pm, Pc, Pk for each color of Y (yellow), M (magenta), C (cyan), and K (black) as an example of image holding means, and a photoreceptor Po for giving gloss to an image when printing a photographic image or the like. The photoreceptors Py to Po are configured with a dielectric whose surface is photosensitive.

[0022] In FIG. 1, around the black photoreceptor Pk, along the rotation direction of the photoreceptor Pk, a charger CCk as an example of a charging means, an exposure machine ROSk as an example of a latent image forming means, a developer Gk as an example of a developing means, a primary transfer roll T1k as an example of a primary transfer means, and a photoreceptor cleaner CLk as an example of a cleaning means for the image holding means are arranged. Similarly, around the other photoreceptors Py, Pm, Pc, Po, a charger CCy, CCm, CCc, CCo, an exposure machine ROSy, ROSm, ROSc, ROSo, a developer Gy, Gm, Gc, Go, a primary transfer roll T1y, T1m, T1c, T1o, and a photoreceptor cleaner CLy, CLm, CLc, Clo are arranged. Above the marking section U1a, toner cartridges Ky, Km, Kc, Kk, Ko, which are an example of developer storage means, are detachably supported. The toner cartridges Ky to Ko store the developer replenished to the developing units Gy to Go.

[0023] Below each photoreceptor Py to Po, an intermediate transfer belt B, which is an example of intermediate transfer means and also an example of image holding means, is disposed. The intermediate transfer belt B is sandwiched between the photoreceptors Py to Po and the primary transfer rolls T1y to T1o. The back surface of the intermediate transfer belt B is supported by a drive roll Rd as an example of drive means, a tension roll Rt as an example of tension applying means, a walking roll Rw as an example of meandering prevention means, a plurality of idler rolls Rf as an example of driven means, a backup roll T2a as an example of opposing means for secondary transfer, a plurality of retract rolls R1 as an example of movable means, and the primary transfer roll T1 y to T1o. On the surface of the intermediate transfer belt B, in the vicinity of the drive roll Rd, a belt cleaner CLB, which is an example of cleaning means for the intermediate transfer means, is disposed.

[0024] Opposite to the backup roll T2a, across the intermediate transfer belt B, a secondary transfer roll T2b, which is an example of a secondary transfer member, is disposed. Further, in order to apply a voltage having a polarity opposite to the charging polarity of the developer to the backup roll T2a, a contact control T2c, which is an example of contact means, is in contact with the backup roll T2a. The backup roll T2a, the secondary transfer roll T2b, and the contact control T2c constitute a secondary transfer device T2, which is an example of secondary transfer means in the first embodiment. The primary transfer rolls T1y to T1o, the intermediate transfer belt B, the secondary transfer device T2, etc. constitute a transfer device T1, B, T2, which is an example of transfer means in the first embodiment.

[0025] Below the secondary transferrer T2, a paper feed tray TR1 is provided as an example of the housing means. The paper feed tray TR1 houses a recording sheet S as an example of the medium. Diagonally above and to the right of the paper feed tray TR1, a pickup roll Rp as an example of the taking-out means and a leveling roll Rs as an example of the leveling means are arranged. A conveyance path SH extends from the leveling roll Rs along which the recording sheet S is conveyed. A plurality of conveyance rolls Ra are arranged as an example of the conveyance means for conveying the recording sheet S downstream along the conveyance path SH. Downstream of the leveling roll Rs, a deburring device Bt is arranged as an example of the removing means for unnecessary parts. The deburring device Bt sandwiches the recording sheet S with a preset pressure and conveys it downstream to remove the unnecessary parts at the edges of the recording sheet S, so-called deburring.

[0026] Downstream of the deburring device Bt, a double-feed detection device Jk is arranged. The double-feed detection device Jk measures the thickness of the passing recording sheet S and detects a state where a plurality of recording sheets S are overlapped, so-called double-feed. Downstream of the double-feed detection device Jk, a correction roll Rc is arranged as an example of the posture correction means. The correction roll Rc corrects the inclination of the recording sheet S with respect to the conveyance direction, so-called skew. Downstream of the correction roll Rc, a registration roll Rr is arranged as an example of the adjustment means for adjusting the conveyance timing of the recording sheet S to the secondary transferrer T2. Also, downstream of the registration roll Rr, a sheet guide SG1 is arranged as an example of the medium guiding means. Note that the feeder unit U2 is also provided with paper feed trays TR2, TR3, etc. configured in the same manner as the paper feed tray TR1, the pickup roll Rp, the leveling roll Rs, and the conveyance roll Ra. The conveyance paths SH from the paper feed trays TR2, TR3 merge into the conveyance path SH of the printer main body U1 upstream of the double-feed detection device Jk.

[0027] A plurality of conveyance belts HB are arranged as an example of the medium conveyance means on the downstream side in the conveyance direction of the recording sheet S with respect to the secondary transfer roll T2b. On the downstream side of the conveying belt HB in the conveying direction of the recording sheet S, a fixing device F, which is an example of a fixing means, is arranged. On the finisher U3 on the downstream side of the fixing device F, a compile tray U3a, which is an example of a stacking means, is arranged. On the compile tray U3a, a stapler U3b, which is an example of a binding part and also an example of a binding part, is arranged. Outside the compile tray U3a, a stacker tray U3c, which is an example of a second stacking means, is arranged.

[0028] On the downstream side of the fixing device F, a reversing path SH2, which is an example of a conveying path branching from the conveying path SH, is formed. At the branching part of the conveying path SH and the reversing path SH2, a first gate GT1, which is an example of a conveying direction switching means, is arranged. On the reversing path SH2, a plurality of switchback rolls Rb, which are an example of a conveying means capable of forward and reverse rotation, are arranged. Upstream of the switchback roll Rb, a connecting path SH3, which is an example of a conveying path branching from the upstream part of the reversing path SH2 and merging downstream of the branching part of the conveying path SH and the reversing path SH2, is formed. At the branching part of the reversing path SH2 and the connecting path SH3, a second gate GT2, which is an example of a conveying direction switching means, is arranged.

[0029] On the downstream side of the reversing path SH2 and below the fixing device F, a folding path SH4 for reversing the conveying direction of the recording sheet S, so-called switchback, is arranged. On the folding path SH4, a switchback roll Rb, which is an example of a conveying means capable of forward and reverse rotation, is arranged. Also, at the entrance of the folding path SH4, a third gate GT3, which is an example of a conveying direction switching means, is arranged. It should be noted that the conveying path SH on the downstream side of the folding path SH4 merges with the conveying path SH of the paper feed tray TR1.

[0030] (Marking operation) In the printer U, when image information transmitted from a personal computer PC is received via a print image server COM, a job which is an image forming operation is started. When the job is started, a photoreceptor Py~Po, an intermediate transfer belt B, etc. rotate. The photoreceptors Py~Po are rotationally driven by a drive source (not shown). The chargers CCy~CCo have a preset voltage applied thereto to charge the surfaces of the photoreceptors Py~Po. The exposure devices ROSy~ROSo output laser lights Ly, Lm, Lc, Lk, Lo as an example of light for writing a latent image in accordance with a control signal from the control unit C, and write an electrostatic latent image on the charged surfaces of the photoreceptors Py~Po. The developing devices Gy~Go develop the electrostatic latent image on the surface of the photoreceptors Py~Po into a visible image. The toner cartridges Ky~Ko supply the developer consumed during development in the developing devices Gy~Go.

[0031] The primary transfer rolls T1y~T1o have a primary transfer voltage of a polarity opposite to the charging polarity of the developer applied thereto, and transfer the visible image on the surface of the photoreceptors Py~Po to the surface of the intermediate transfer belt B. The photoreceptor cleaners CLy~CLo remove and clean the developer remaining on the surfaces of the photoreceptors Py~Po after primary transfer. When passing through the primary transfer area facing the photoreceptors Py~Po, the images are transferred and laminated in the order of O, Y, M, C, K, and pass through the secondary transfer area Q4 facing the secondary transfer device T2. In the case of a monochrome image, only an image of one color is transferred and sent to the secondary transfer area Q4.

[0032] The pickup roll Rp feeds out the recording sheet S from the paper feed trays TR1~TR3 where the supply of the recording sheet S is performed according to the size of the received image information, the designation of the recording sheet S, the size and type of the accommodated recording sheet S, etc. The separating roll Rs separates and feeds out the recording sheets S sent out from the pickup roll Rp one by one. The burr removing device Bt applies a preset pressure to the passing recording sheet S to remove burrs. The double feed detecting device Jk detects double feed of the recording sheet S by detecting the thickness of the passing recording sheet S. The correction roll Rc corrects skew by bringing the passing recording sheet S into contact with a wall surface (not shown).

[0033] The registration roll Rr feeds out the recording sheet S in accordance with the timing when the image on the surface of the intermediate transfer belt B is sent to the secondary transfer area Q4. The sheet guide SG1 guides the recording sheet S fed out by the registration roll Rr to the secondary transfer area Q4. The secondary transferrer T2 applies a secondary transfer voltage having the same polarity as the charging polarity of the developer preset to the backup roll T2a via the contact control T2c, and transfers the image of the intermediate transfer belt B to the recording sheet S onto the recording sheet S. The belt cleaner CLB removes and cleans the developer remaining on the surface of the intermediate transfer belt B after the image has been transferred in the secondary transfer area Q4. The conveyance belt HB holds the recording sheet S onto which the image has been transferred by the secondary transferrer T2 on its surface and conveys it downstream.

[0034] The fixing device F includes a heating roll Fh as an example of a heating means and a pressure roll Fp as an example of a pressure means. Inside the heating roll Fh, a heater h as an example of a heat source is accommodated. The fixing device F heats the recording sheet S passing through the fixing area Q5 where the heating roll Fh and the pressure roll Fp are in contact while applying pressure, and fixes the unfixed image on the surface of the recording sheet S. The fixing means Fp, Fh of Example 1 is constituted by the heating roll Fh and the pressure roll Fp.

[0035] When double-sided printing is performed, the recording sheet S that has passed through the fixing device F is conveyed to the reverse path SH2 by the operation of the first gate GT1. The recording sheet S sent to the reverse path SH2 has its conveyance direction reversed forward and backward in the folding path SH4, so-called switched back. The switched-back recording sheet S is re-fed to the registration roll Rr through the conveyance path SH, and the second printing is performed. When the recording sheet S is discharged to the stack tray U3c with the image-printed side facing up, that is, in the case of so-called face-up discharge, it is conveyed through the conveyance path SH and discharged to the stack tray U3c via the compile tray U3a.

[0036] On the other hand, when it is discharged with the image-printed side facing down, that is, in the case of so-called face-down discharge, it is once carried into the reverse path SH2 from the conveyance path SH. Then, after the rear end of the recording sheet S in the conveyance direction passes through the second gate GT2, the forward rotation of the switch-back roll Rb stops. Then, the second gate GT2 switches, and the switch-back roll Rb rotates reversely, and the recording sheet S is conveyed through the connection path SH3 and conveyed toward the stack tray U3c. When the bundle of recording sheets S is stapled, the recording sheets S are stacked on the compile tray U3a and aligned by an aligning means (not shown). The aligned recording sheets S are stapled by the stapler U3b. The stapled bundle of recording sheets S is discharged to the stack tray U3c.

[0037] (Description of the stapleless stapler) Figure 2 is an overall explanatory view of the stapleless stapling portion of the first embodiment. In Figure 2, the stapler U3b of the first embodiment is composed of a stapling portion that staples without using stapling pins, so-called a stapleless stapler. The stapleless stapler U3b has an upper stapling member 1 as an example of the first stapling portion and a lower stapling member 2 as an example of the second stapling portion. The upper stapling member 1 and the lower stapling member 2 are supported so as to be movable in directions approaching and separating from each other by a driving device composed of a motor, gears, etc. (not shown).

[0038] FIG. 3 is an explanatory view of the tooth portion of the stitchless binding portion of Example 1. FIG. 3A is an overall explanatory view, and FIG. 3B is an enlarged view of the convex portion. In FIGS. 2 and 3, an upper tooth portion 11 is formed on the lower surface of the upper binding member 1. The upper tooth portion 11 has a plurality of convex portions 12, and the convex portions 12 are arranged side by side along the arrangement direction 13. Therefore, the upper tooth portion 11 has a configuration with a plurality of concavities and convexities. In FIG. 3, the convex portion 12 of Example 1 has a top surface 12a of the tip portion formed in a curved surface shape. At both ends of the top surface 12a, a tip slope 12b, which is an example of a first slope and also an example of a tip portion, continues. On the root side of the tip slope 12b, a base slope 12c, which is an example of a second slope and also an example of a base end portion, continues. On the root side of the base slope 12c, a bottom surface 12d extending parallel to the arrangement direction 13 is arranged. In Example 1, the base slope 12c is formed at a smaller angle with respect to the gravity direction than the angle θ1 formed by the tip slope 12b with respect to the direction (gravity direction) in which the binding members 1 and 2 approach and separate from each other. That is, the base slope 12c is formed as a steeper slope than the tip slope 12b. As an example, in the example, θ1 = 35° and θ2 = 27° are set. Also, the teeth (convex portions 12) are arranged side by side in 10 (10 teeth) along the arrangement direction 13.

[0039] In FIG. 3, in the upper tooth portion 11 of Example 1, among the plurality of convex portions 12, the convex portions 12 (12A) of the two central teeth, which are the teeth at the central portion in the arrangement direction 13 of the convex portions 12, protrude more at the tip than the convex portions 12 (12B) arranged at positions different from the central portion. Specifically, although each convex portion 12 of Example 1 is formed in the same size, the base end portion of each convex portion 12 protrudes more toward the tip side in the convex portion 12 (12A) at the central portion in the arrangement direction 13 than in the convex portions 12 (12B) at both end portions in the arrangement direction 13. In other words, the protruding amounts of the plurality of convex portions 12 are different among the convex portion 12A at the central portion, the convex portion 12B at the end portion, and the convex portion 12C at the intermediate portion between the central portion and the end portion in the arrangement direction 13, and the plurality of convex portions 12 protrude in the convex direction as going from the end portion to the central portion in the arrangement direction 13. In Example 1, as shown by the broken line in FIG. 3, the straight line 16 connecting the base end portions is formed in an arch shape that protrudes as going toward the central portion. That is, the positions of the base ends of the respective convex portions 12 protrude in the convex direction as going from the end portion to the central portion in the arrangement direction 13. In this embodiment, the teeth at the central portion are two central teeth, but it may be one central tooth, or conversely, about six teeth may be the teeth at the central portion. In the case of a plurality of teeth such as six teeth, it may be seen by the average of the tooth heights.

[0040] Note that the lower binding member 2 is formed in a shape that is vertically symmetric with the upper binding member 1, and has a lower tooth portion 21 and convex portions 22 configured in the same manner as the upper tooth portion 11 and the convex portions 12. The upper tooth portion 11 and the lower tooth portion 21 are arranged at positions shifted with respect to the arrangement direction 13 such that the top surface 12a of the convex portion 12 of the upper tooth portion 11 faces the bottom surface 12d of the convex portion 22 of the lower tooth portion 21. When the upper binding member 1 and the lower binding member 2 approach each other, the upper tooth portion 11 and the lower tooth portion 21 are in a state of meshing with each other.

[0041] (Description of the manufacturing method) FIG. 4 is an explanatory view of the manufacturing method of the binding member of Example 1. FIG. 4A is an explanatory view of the forming process, FIG. 4B is an explanatory view of the warping process, FIG. 4C is an explanatory view of the cutting process, FIG. 4D is an explanatory view of the first adjustment process, FIG. 4E is an explanatory view of the second adjustment process, and FIG. 4F is an explanatory view of the meshing process. Next, the manufacturing method of each binding member 1 and 2 of Example 1 will be described. (Forming process) In FIG. 4A, in the forming process, each binding member 1, 2 is formed using a mold for forming. As the mold, a mold in which the arrangement of the convex portions 12 is in a straight line along the arrangement direction 13 is used. Each binding member 1, 2 of Example 1 is made of metal as an example, and can be formed by a metal injection method as an example of a baking method. Note that the method is not limited to metal injection, and it can be formed by any method such as precision casting, die casting, cutting, pressing, or a combination thereof.

[0042] (Bending process) In FIG. 4B, in the bending process, the binding members 1, 2 created in the forming process are bent. In the bending process of Example 1, with both end portions in the arrangement direction 13 of the binding members 1, 2 supported by the jig 31, the central portion in the arrangement direction 13 and the surface on the side opposite to the tooth portions 11, 21 (the back surface 17) are pushed by the press machine 32, thereby bending the central portion of the binding members 1, 2. Therefore, the tooth portions 11, 21 of the binding members 1, 2 are processed into an arcuate shape such that the central portion in the arrangement direction of the base end portion protrudes.

[0043] (Cutting process) In FIG. 4C, in the cutting process, the back surface 17 of the binding members 1, 2 that have undergone the bending process is cut so as to be planar. That is, corresponding to the back surface 17 becoming arcuate after the bending process or the back surface 17 being wavy due to variations during forming, the back surface 17 is cut so as to be planar. This makes it easier to apply pressure to the back surface 17 when the back surface 17 is pressed and pressure is applied to bind the medium when incorporated into the binding device.

[0044] FIG. 5 is an enlarged view of the main part of the first adjustment process of Example 1, FIG. 5A is an explanatory view of the state before adjustment, and FIG. 5B is an explanatory view of the state after adjustment. (Sizing 1: First adjustment process) In FIG. 4D, in the first adjustment step, the center positions of the convex portions 12 and 22 are adjusted. In FIG. 5A, when the binding members 1 and 2 are pressed by the press 32 in the warping step, displacement is likely to occur such that the tips and the center positions 41 of the convex portions 12 and 22 are more open to the outside in the arrangement direction 13. In the first adjustment step of Example 1, the first die 42 is pressed against each convex portion 12 and 22, and the center position 41 of each convex portion 12 and 22 is adjusted to a predetermined position as shown in FIG. 5B. That is, the convex portions 12 and 22 are pushed to adjust the positions so that the center positions 41 are arranged at a predetermined interval. In Example 1, the center position 41 is set at the position of the apex (tip) of each convex portion 12 and 22. The first die 42 of Example 1 contacts the tip slope 12b and the base slope 12c to push the convex portions 12 and 22 and adjust the center position 41. That is, the adjustment is made in such a manner that the entire convex portions 12 and 22 are pushed. When pressing the first die 42, it is necessary to hold down the back surface 17 side. In Example 1, the back surface 17 is flattened in the cutting process, making it easier to press and adjust the first die 42.

[0045] FIG. 6 is an enlarged view of the main part of the second adjustment step of Example 1. (Sizing 2: Second adjustment step) In FIG. 4E, in the second adjustment step, the outer shape of the convex portions 12 and 22 is adjusted. In the first adjustment step, the convex portions 12 and 22 are pressed by the first die 42 and processed, and the outer shape of the convex portions 12 and 22 may be disturbed. In particular, in the adjustment for adjusting the center position, a large load is applied to each tooth, and the outer diameter is likely to be disturbed. Also, corrections with a large contact area with the die are likely to apply a load to the teeth. In FIG. 6, in the second adjustment step of Example 1, the second die 51 is pressed against each convex portion 12 and 22, and the outer shape of each convex portion 12 and 22 is adjusted to the outer shape as shown in FIG. 3. The second die 51 of Example 1 contacts the tip slopes 12b and 22b to push the convex portions 12 and 22 and adjust the outer shape. That is, the adjustment is made in such a manner that a part of the convex portions 12 and 22 is pushed. Therefore, in the second adjustment step, the portion where the convex portions 12 and 22 are pushed is less than that in the first adjustment step.

[0046] (Pairing: Meshing Process) In Fig. 4F, in the meshing process, the binding members 1 and 2 that have undergone the second adjustment process are meshed with each other to check whether they mesh with each other so as to bind the stack of papers.

[0047] (Operation of Embodiment 1) In the printer U of Embodiment 1 having the above configuration, the stack of recording sheets S loaded on the compile tray U3a is sandwiched between the upper binding member 1 and the lower binding member 2 of the stapleless stapler U3b and is bound.

[0048] Fig. 7 is an explanatory diagram when a stack of papers is bound with a conventional configuration. Fig. 7A is an explanatory diagram of a state where the tip of the convex portion of the stapleless binding portion contacts the surface of the stack of papers, and Fig. 7B is an explanatory diagram of a state where the binding member is pushed in from the state shown in Fig. 7A. In Fig. 7A, in a configuration where the heights of the conventional teeth are made uniform, in actual products, the heights of the teeth slightly vary. This is because the cost of each tooth is high when the tooth profile is made by cutting, so generally it is manufactured by applying heat such as sintering or metal injection. In that case, since the area of the front side of the tooth is larger than that of the back side, it cools first, and a phenomenon called shrinkage occurs. Therefore, when it is made by baking, it results in a tooth profile with an overall concave shape where the center is slightly concave and both ends protrude compared to the shape of the mold. Also, this tendency becomes more prominent as the size of the teeth increases because the difference in surface area becomes larger. That is, just designing the tooth tips to be straight and molding them with a straight mold shape does not result in a straight finish, and as a result, it becomes an overall concave shape.

[0049] In the conventional configuration, when the recording sheet 01 is bound, it is assumed that the top surface portions 02a and 03a, which are the tips of the convex portions 02 and 03 at the center of the entire or the arrangement direction of the recording sheet 01, first come into contact. However, if the binding members 04 and 05 are concave as a whole, there is a problem that the ends may come into contact first instead of the center in the arrangement direction, and the recording sheet 01 does not contact the top surface portions 02a and 03a as assumed. When the binding members 04 and 05 move in the direction of approaching each other when the recording sheet 01 is being bound, as shown in FIG. 7B, the recording sheet 01 is pushed and deformed according to the shapes of the convex portions 02 and 03. In the state of FIG. 7A, with respect to the length L1 of the recording sheet 01 between the top surface 02a of the upper convex portion 02 and the top surface 03a of the adjacent lower convex portion 03, in the state of FIG. 7B, the length L2 of the recording sheet 01 at the same portion satisfies L1 < L2. Therefore, if the recording sheet 01 does not extend due to stretching between the fibers of the recording sheet 01, etc., the recording sheet 01 cannot be bound and breaks.

[0050] Here, when the top surfaces 02a and 03a of the tooth portions 02B and 03B at both ends in the arrangement direction 06 contact the recording sheet 01 earlier than the tooth portions 02A and 03A at the central portion, the both ends of the recording sheet 01 are constrained by the top surfaces 02a and 03a of the tooth portions 02B and 03B at both ends. Thus, the recording sheet 01 inside the top surfaces 02a and 03a of the tooth portions 02B and 03B at both ends needs to have a length that changes from L1 to L2 due to the elongation of the recording sheet 01 itself. Therefore, depending on the type of the recording sheet 01, there is a problem that the recording sheet 01 is likely to break. Also, the binding force when binding the recording sheet 01 is largely determined by the shapes of the teeth (convex portions 02 and 03) and the binding area (the width in the arrangement direction 13 of the binding members 1 and 2). Since the binding area needs to be kept at a certain size, within the limited binding area, each tooth needs to contribute to the binding force. As in the prior arts described in Patent Documents 2 and 3, if the teeth at both ends are made small, there will be teeth that cannot contribute to the binding force, and there is also a problem that unevenness and variation occur in the binding.

[0051] FIG. 8 is an explanatory diagram when a bundle of papers is bound with the configuration of Example 1. FIG. 8A is an explanatory diagram of a state where the tip of the convex portion at the center of the stitchless binding portion contacts the surface of the bundle of papers, FIG. 8B is an explanatory diagram of a state where the binding member is pushed in from the state shown in FIG. 8A, and FIG. 8C is an explanatory diagram of a state where the binding member is further pushed in from the state of FIG. 8B. In FIG. 8, in Example 1, the convex portions 12A and 22A at the center in the arrangement direction 13 protrude more than the convex portions 12B and 22B at both ends. As shown in FIG. 8A, the convex portions 12A and 22A at the center contact the medium earlier than the other convex portions 12B and 22B. Specifically, when binding, the convex portions 12A and 22A at the center first contact the recording sheet S. Therefore, except at the center portion, the recording sheet S is in a state where the outside of the recording sheet S in the arrangement direction 13 is not yet constrained. When the recording sheet S starts to be pushed in at the portions of the convex portions 12A and 22A at the center, as shown in FIG. 8B, the recording sheet S can move inward from the outside in the arrangement direction 13. Therefore, even if the length does not change from L1 to L2 only due to the elongation of the recording sheet S itself, the length may be L2 including the portion that enters from the outside. Thus, even if the type of the recording sheet S is a type that is difficult to stretch, the recording sheet S can be bound without breaking.

[0052] In particular, in the stapler U3b of Example 1, the convex portions 12A and 22A at the center protrude the most, and are configured such that the amount of protrusion decreases toward the outside. Therefore, as the binding members 1 and 2 are pushed in, it becomes easier to flow in sequentially from the outside to the inside in the arrangement direction 13, and it becomes less likely to break over the entire binding region. Also, in the stapler U3b of Example 1, the convex portions 12A and 22A at the center are protruded in the warping process. Therefore, it is possible to use the binding members 1 and 2 having a conventional configuration in which the center does not protrude, and there is no need to change the forming apparatus itself. Further, the binding members 1 and 2 have different material thicknesses at the tips and bases of the convex portions 12 and 22, and in the process of the material hardening in the forming process, the degrees of thermal expansion and thermal contraction may not be uniform and may be distorted (so-called sink marks may occur). In the warping process of Example 1, this distortion is corrected and modified to finally correct the tooth arrangement so that the teeth at the center portion protrude.

[0053] Also, in the stapler U3b of Example 1, in the first adjustment step, the center positions 41 of the convex portions 12 and 22 are aligned. If the center positions 41 of the convex portions 12 and 22 are misaligned, when the binding members 1 and 2 approach each other and a force is applied to the recording sheet S, the applied force may vary, resulting in incomplete binding or breakage. In contrast, in Example 1, the center positions 41 are aligned in the first adjustment step, making the recording sheet S less likely to break and ensuring reliable binding. Particularly, in the first adjustment step of Example 1, the first die 42 contacts the tip slopes 12b and 22b and the base slopes 12c and 22c. Therefore, the first die 42 contacts each slope 12b, 12c, 22b, 22c of the convex portions 12 and 22 and adjusts the center position 41 by pressing the entire part except the R part at the tip. In the adjustment of only pressing the tip slopes 12b of the convex portions 12 and 22, the tip slopes 12b and 22b may be distorted with respect to the base slopes 12c and 22c, and the adjustment of the base slopes 12c and 22c may be insufficient. If the adjustment of the base slopes 12c and 22c is insufficient, during the adjustment in the second adjustment step, the deviation of the center position 41 cannot be fully adjusted, and ultimately there is a problem that the center position 41 is likely to remain misaligned.

[0054] Also, in the adjustment of only pressing the base slopes 12b of the convex portions 12 and 22, the positions of the top surfaces 12a and 22a of the tip slopes 12b and 22b may deviate from the center position 41. When the center position 41 deviates, the position where the convex portions 12 and 22 first contact the surface of the recording sheet S, that is, the position where the recording sheet S is constrained, deviates from the predetermined position. If the intervals between the convex portions 12 and 22 vary and the intervals between the positions where the top surfaces 12a and 22a of the convex portions 12 and 22 contact vary, there will be short and long portions of the recording sheet S between the top surfaces 12a and 22a. When the length of the recording sheet S is short, when the recording sheet S is stretched during binding, there is little room for stretching, and there is a problem that the recording sheet S is likely to break or the like. In other words, it is desirable that the paper stretches evenly from the top to the base of the convex portion. For this purpose, it is better that the convex pitch is constant and the center with the meshing concave portion is correct. In contrast, in Example 1, with the first die 42, the adjustment is made by pressing the entire convex portions 12 and 22. Compared with the case where the entire part is not pressed, the adjustment can be performed with higher accuracy. Therefore, in the binding members 1 and 2 of Example 1, the variation in the interval between the convex portions 12 and 22 is reduced, and the breakage of the recording sheet S is suppressed. In particular, in Example 1, since the first die 42 does not contact the R portions at the tips of the convex portions 12 and 22, it is possible to suppress the tip portions from being crushed due to the load of the first die 42.

[0055] Furthermore, in the stapler U3b of Example 1, in the binding members 1 and 2, the outer shape of the convex portions 12 and 22 is adjusted in the second adjustment step. If the outer shape of the convex portions 12 and 22 is distorted and not in a predetermined shape, when the binding members 1 and 2 approach each other and a force is applied to the recording sheet S, there may be variations in the applied force, resulting in incomplete binding or breakage. In contrast, in the second adjustment step of Example 1, the outer shape is adjusted, making the recording sheet S less likely to break and ensuring reliable binding. In particular, in the second adjustment step of Example 1, the second die 51 contacts the tip slopes 12b and 22b and presses the convex portions 12 and 22. When the binding members 1 and 2 approach each other to bind the recording sheet S, the part that first starts to stretch the recording sheet S is the tip slope 12b and 22b. Therefore, if there are variations in the outer shape of the tip slopes 12b and 22b, there may be variations in the force applied to the recording sheet S, resulting in incomplete binding or breakage. In particular, if variations occur at the start of stretching, the adverse effects until the final bound state are increased. In contrast, in Example 1, the part of the tip slopes 12b and 22b where the force acts at the start of binding is adjusted by the second die 51. Therefore, compared with the case where the tip slopes 12b and 22b are not adjusted, the variation in the force applied when starting to bind the recording sheet S is suppressed, and breakage of the recording sheet S is suppressed.

[0056] Also, in the case of the convex portions 12 and 22 of Example 1, where the base end slopes 12c and 22c are steeper than the tip slopes 12b and 22b, the tip slopes 12b and 22b with a gentle slope at the start of binding gradually apply more force to the recording sheet S than the base end slopes 12c and 22c. So to speak, at the start of binding, the recording sheet S is slowly and gradually stretched. Then, after being stretched to a certain extent at the tip slopes 12b and 22b, the recording sheet S contacts the inflection region between the tip slopes 12b and 22b and the steep base end slopes 12c and 22c, and is deformed into the final state under a greater force than in the case of the tip slopes 12b and 22b, and is bound. Therefore, if the recording sheet S is rapidly stretched at the start of binding, there is a problem that the recording sheet S is likely to break, and if there is variation at the start of binding, there is also a problem that it is likely to break at the subsequent stretching stage. In Example 1, the outer shape of the tip slopes 12b and 22b that contact the recording sheet S at the particularly important start of binding is adjusted in the second adjustment step. Also, at this time, since it is adjusted from the same direction as the recording sheet S contacts the inflection region between the tip slope 12b and the steep base end slope 12c, no burrs or the like are generated in the direction of the recording sheet S in the inflection region, and it becomes a smooth shape with respect to the sheet S. Therefore, compared with the case where the outer shape of the tip slopes 12b and 22b is not adjusted, breakage of the recording sheet S is suppressed.

[0057] (Modified Example) As described above, the embodiments of the present invention have been described in detail. However, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Modified examples (H01) to (H012) of the present invention are exemplified below. (H01) In the above embodiment, the printer U as an example of an image forming apparatus is exemplified, but it is not limited thereto. For example, it can also be configured by a copying machine, a FAX, or a multifunction machine having a plurality or all of these functions. Further, it is not limited to an electrophotographic image forming apparatus, and can be applied to any image forming apparatus such as an inkjet method or a thermal transfer method.

[0058] (H02) In the above embodiment, as the printer U, a configuration in which five-color developers are used was exemplified, but the present invention is not limited thereto. For example, it is also applicable to a single-color image forming apparatus or a multi-color image forming apparatus with four or fewer or six or more colors. (H03) In the above embodiment, as an example of the image holding means, an endless belt-shaped intermediate transfer belt B was exemplified, but the present invention is not limited thereto. For example, it is also applicable to a cylindrical intermediate transfer drum, a photoreceptor drum, or a photoreceptor belt. Further, the present invention is also applicable to a configuration in which an intermediate transfer member is not provided and an image is directly recorded on the recording sheet S from the photoreceptor.

[0059] (H04) In the above embodiment, it is desirable to execute the warping step. However, when it is not necessary to project the central portion or when the central portion is formed in a protruding form in the forming step, it is also possible not to execute the warping step. At this time, the distortion (sink mark) in the forming step can be adjusted in the first adjustment step or the second adjustment step. (H05) In the above embodiment, it is desirable to execute the cutting step. However, when it is possible to prepare a jig for pressing the back surface 17 in each adjustment step, it is also possible not to execute the cutting step. (H06) In the above embodiment, the shapes of the convex portions 12 and 22 were exemplified as being the same, but the present invention is not limited thereto. For example, it is also possible to use convex portions 12 and 22 having different shapes and sizes. When the shapes of the convex portions 12 and 22 are individually different, it is necessary to prepare dies 42 and 51 accordingly. Further, it is desirable to adopt a configuration in which the central convex portion protrudes, but the present invention is not limited thereto. For example, it is also possible to adopt a form in which the protruding amounts of the central portion and both end portions are large and the intermediate portion has a smaller protruding amount than the central portion and both end portions, that is, a so-called W-shaped arrangement.

[0060] (H07) In the above embodiment, the convex portions 12 and 22 are exemplified as having a form in which the base end is in an arc shape with the center being the most protruding, that is, a form in which the protruding amount continuously increases, but it is not limited to this. For example, it is also possible to have a form in which the base end becomes larger stepwise or in a stepped manner. Further, the convex portions 12 and 22 are not limited to a configuration in which the protruding amount changes one by one. For example, the protruding amounts of two convex portions in the central portion are the largest, the protruding amounts of two convex portions on the outside thereof are next largest, the protruding amounts of two convex portions on the outside thereof are next largest, and so on. It is also possible to have a configuration in which the protruding amounts of a plurality of convex portions are the same and change stepwise. (H08) In the above embodiment, the finisher U3 and the main body U1 of the printer are exemplified as having a separate configuration, but it is also possible to have an integrated configuration.

[0061] (H09) In the above embodiment, it is processed by metal injection, but it can be formed by any method such as cutting, pressing, or a combination thereof. (H010) In addition, in Example 1, the entire body except the tip was pushed, but in the first mold, the entire body including the tip may be pushed, and in the second mold, the tip may be excluded. In this way, especially when the adjustment amount at the center position is large, including the tip results in a larger contact area and easier force transmission, and it is less likely to cause a difference between the two tip-side slopes following the tip of the tooth. (H011) In Example 1, it contacted the slopes on the base end side and the tip end side in the first mold, but it may be configured to contact only the slope on the base end side. In this way, the slope on the base end side can be adjusted greatly.

[0062] In Example 1, a mold that is linear along the alignment direction was used, but it is not limited to this. For example, it is also possible to use a concave mold so that the arrangement of the convex portions 12 is originally mountain-shaped along the alignment direction 13. Considering the deformation (sink marks) after being taken out of the concave mold and cooled, it is possible to set the shape of the recess of the mold so that the convex portions 12 are mountain-shaped. Therefore, it is also possible not to perform the warping process, cutting process, and sizing process performed in Example 1. Also, when only sizing is performed without performing warping or the like, compared to Example 1, since there is less deviation of the center line because warping or the like is not performed, only sizing may be performed.

Explanation of Symbols

[0063] 1…First fastening part, 2…Second fastening part, 12, 22…Convex parts, 12b, 22b…Tip parts, 12c, 22c…Base end parts, 41…Center position, 42…First mold 51…Second mold, S…Medium U3b…Fastening part without needle.

Claims

1. A method for manufacturing a seamless binding portion that has a first binding portion with a plurality of concavities and convexities, and a second binding portion that is disposed opposite to the first binding portion and has concavities and convexities that fit with the concavities and convexities of the first binding portion, and sandwiches a medium in the thickness direction of the medium between the first binding portion and the second binding portion to bind the media together, comprising: A mold forming step of forming each of the binding portions with a mold; A first adjusting step of pressing the convex portions of each of the binding portions that have been subjected to the mold forming step and taken out of the mold, and adjusting the positions of the convex portions in the arrangement direction, which is the direction in which the concavities and convexities are arranged; A second adjusting step of pressing a part of the convex portion with a contact area smaller than that of the first adjusting step against the convex portion whose position has been adjusted in the first adjusting step to adjust the outer shape of the convex portion; while executing: After the mold forming step and before the first adjusting step, a step of pressing a portion opposite to the portion with concavities and convexities at the center in the arrangement direction of the plurality of concavities and convexities in each of the binding portions to warp the portion with concavities and convexities is executed A method for manufacturing a seamless binding portion.

2. After the warping step and before the first adjusting step, a step of processing so that the opposite portion becomes flat The method for manufacturing a seamless binding portion according to claim 1, characterized in that the step is executed.

3. A method for manufacturing a seamless binding portion that has a first binding portion with a plurality of concavities and convexities, and a second binding portion that is disposed opposite to the first binding portion and has concavities and convexities that fit with the concavities and convexities of the first binding portion, and sandwiches a medium in the thickness direction of the medium between the first binding portion and the second binding portion to bind the media together, comprising: A mold forming step of forming each of the binding portions with a mold; A first adjusting step of pressing the convex portions of each of the binding portions that have been subjected to the mold forming step and taken out of the mold, and adjusting the positions of the convex portions in the arrangement direction, which is the direction in which the concavities and convexities are arranged; With respect to the convex portion whose position has been adjusted in the first adjusting step, less A second adjusting step of pressing a part of the convex portion with a contact area than that of the first adjusting step to adjust the outer shape of the convex portion; while executing: A forming step of using a mold that is recessed so that the convex portion at the center in the arrangement direction of the plurality of concavities and convexities protrudes the most, and forming each of the binding portions with the recessed mold is executed A method for manufacturing a seamless binding portion.

4. The convex portion formed in the mold forming step has a first inclined surface and a second inclined surface on the base end side of the first inclined surface. In the first adjustment step, a first mold for adjustment that adjusts the position of the convex portion contacts the first inclined surface and the second inclined surface of the convex portion formed in the mold forming step. In the second adjustment step, among the convex portions after the first adjustment step that contact the first mold, the convex portions where the first inclined surface contacts a second mold for adjustment that adjusts the outer shape of the convex portion, and the second mold does not contact the second inclined surface. The manufacturing method of the stitchless binding portion according to any one of claims 1 to 3.

5. The first inclined surface and the second inclined surface of the convex portion formed in the mold forming step are continuous, and in the first adjustment step, the first mold contacts a bending region where the first inclined surface switches to the second inclined surface. The manufacturing method of the stitchless binding portion according to claim 4.

6. A second adjustment step of adjusting the outer shape of a portion where force is applied when stitching the convex portion of the binding portion after adjustment in the second adjustment step by adjusting the outer shape of the first inclined surface on the tip side of the convex portion whose position has been adjusted in the first adjustment step. The manufacturing method of the stitchless binding portion according to any one of claims 1 to 5, characterized by executing this.

7. The inclination of the second inclined surface on the base end side is steep with respect to the first inclined surface on the tip side of the convex portion of the binding portion. The manufacturing method of the stitchless binding portion according to claim 6.

8. In the first adjustment step and the second adjustment step, the adjustment mold contacts the inclined surface of the convex portion. The manufacturing method of the stitchless binding portion according to any one of claims 1 to 7.

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