Bending device

Abstract

A bending device is provided with: a first belt (13) that conveys a workpiece (W) in the X direction; a second belt (23) that sandwiches the workpiece (W) between the second belt (23) and the first belt (13) in the Z direction, and that conveys the workpiece (W) in the X direction together with the first belt (13); a first die section (30) facing the workpiece (W) in the Z direction across a first belt (13); a second die section (40) facing the workpiece (W) in the Z direction across a second belt (23) and facing the first die section (30) in the Z direction; and a pressing part that presses the first mold part (30) toward the second mold part (40). The second die section (40) has, in an upstream region in the X direction, at least one upstream contact surface that comes into contact with a workpiece side edge section (Wf) that protrudes from the first belt (13) and the second belt (23) in the Y direction, and the first die section (30) has, in a midstream region, at least one midstream contact surface (362) that comes into contact with the workpiece side edge section (Wf). The upstream contact surface is inclined with respect to the X direction so as to face the-Z direction further toward the + X direction, and the midstream contact surface (362) is inclined with respect to the Y direction so as to face the-Z direction further toward the inside of the Y direction at a position closer to the-Z direction than the workpiece contact surface of the first belt (13).

Description

Technical Field

[0001] The invention relates to a bending device for bending a workpiece. Background Art

[0002] In the past, there is known a Velcro for mounting a skin material on a buffer body. For example, the Velcro disclosed in Patent Document 1 has a strip-shaped base material and a plurality of engaging elements provided on the surface of the base material. The base material has: a main body portion, on which a plurality of engaging elements are arranged; and a side edge portion, which is bent relative to the main body toward a side opposite to the engaging element side. When mounting the skin material on the buffer body, after the buffer body and the base material of the Velcro are integrally formed, the skin material is engaged with the engaging elements of the Velcro. At this time, the side edge portion of the base material is configured to be deeply inserted into the buffer body, thereby improving the tightness of the Velcro relative to the buffer body.

[0003] In addition, as a general bending device for resin products, there is a device disclosed in Patent Document 2. The device includes an upper belt and a lower belt that clamp the workpiece and transport the workpiece in a transport direction, and a bending unit including a plurality of rollers. In the device, the bending angle of the workpiece is adjusted by changing the configuration height of each roller.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2018-99516

[0007] Patent Document 2: Japanese Patent Application Publication No. 2000-176999 Summary of the invention

[0008] Problem that the invention aims to solve

[0009] An apparatus capable of bending a workpiece such as a hook and loop fastener is required as an apparatus capable of manufacturing the hook and loop fastener disclosed in Patent Document 1. In particular, an apparatus capable of reliably bending a workpiece is desired in consideration of bending recovery (springback) after bending.

[0010] However, in the conventional bending device disclosed in Patent Document 2, the peripheral surfaces of the rollers constituting the bending unit are arranged parallel or perpendicular to the conveying direction, so it is difficult to ensure the pressing area of ​​the rollers on the side edges of the workpiece, making it difficult to reliably bend the workpiece.

[0011] An object of the present invention is to provide a bending device capable of reliably bending a workpiece.

[0012] Solutions for solving problems

[0013] A bending device according to one embodiment of the present invention comprises: a first belt, which transports a workpiece along a conveying direction; a second belt, which clamps the workpiece between the first belt and the second belt in an up-down direction orthogonal to the conveying direction, and conveys the workpiece along the conveying direction together with the first belt; a first mold portion, which is opposite to the workpiece in the up-down direction via the first belt; a second mold portion, which is opposite to the workpiece in the up-down direction via the second belt, and is opposite to the first mold portion in the up-down direction; and a pressing portion, which presses the first mold portion or the second mold portion in a direction in which the first mold portion and the second mold portion approach each other in the up-down direction, the second mold portion having a portion in an upstream region of the conveying direction that is opposite to the first belt and the second belt in a conveying width direction. At least one upstream abutting surface abuts against the side edge of the workpiece of the protruding workpiece, the conveying width direction is orthogonal to the conveying direction and the up-down direction respectively, the first mold part or the second mold part has at least one midstream abutting surface abutting against the side edge of the workpiece in the midstream area on the downstream side of the conveying direction than the upstream abutting surface, when the direction from the second belt toward the first belt in the up-down direction is taken as the downward direction, the upstream abutting surface is inclined relative to the conveying direction in a manner that the more it goes toward the downstream side of the conveying direction, the more it goes toward the downward direction, and the midstream abutting surface is inclined relative to the conveying width direction in a manner that the more it goes toward the inner side of the conveying width direction, the more it goes toward the downward direction at a position closer to the downward direction than the workpiece abutting surface of the first belt.

[0014] In such a structure, during the transportation of the workpiece using the first belt and the second belt, in the upstream area of ​​the transportation direction, the upstream abutment surface pushes the side edge of the workpiece downward to bend the side edge of the workpiece. As a result, the side edge of the workpiece is in a state of standing up in a downward direction relative to the part of the workpiece sandwiched by the first belt and the second belt (the main body of the workpiece). Afterwards, in the midstream area of ​​the transportation direction and in an area below the workpiece abutment surface of the first belt, the midstream abutment surface pushes the side edge of the workpiece to further bend the side edge of the workpiece. As a result, the side edge of the workpiece is bent until it becomes opposite to the main body of the workpiece (for example, until the angle formed between the side edge of the workpiece and the main body of the workpiece is less than 90 degrees).

[0015] Here, during the conveyance of the workpiece, the main body of the workpiece is arranged along an imaginary plane parallel to the conveyance direction and the conveyance width direction, and the side edge of the workpiece is bent from the posture along the imaginary plane to a posture inclined relative to the conveyance width direction in a manner opposite to the main body of the workpiece. The midstream abutment surface is inclined relative to the conveyance width direction, so it is easy to ensure the pressing area of ​​the side edge of the workpiece. As a result, the workpiece can be reliably bent.

[0016] In a bending device of one form of the present invention, it is preferred that the first mold portion comprises: an upper surface facing the direction opposite to the downward direction, i.e., the upward direction; and at least one groove formed on the upper surface and capable of allowing the side edge of the workpiece to pass through, and the midstream abutment surface is formed on the opening edge of the groove.

[0017] In such a structure, the length of the midstream contact surface in the conveying direction can be adjusted according to the length of the groove in the conveying direction. Thus, the length of the bending section formed by the midstream contact surface can be easily adjusted.

[0018] In the folding device according to one aspect of the present invention, preferably, the groove extends toward the inner side in the conveying width direction as it goes toward the downstream side in the conveying direction, and the midstream contact surface extends along the extending direction of the groove.

[0019] In such a structure, the bending angle between the workpiece side edge and the workpiece body can be adjusted according to the extending direction and the extending length of the groove. For example, the more the groove is toward the inner side of the conveying width direction, the smaller the bending angle between the workpiece side edge and the workpiece body can be.

[0020] In the bending device according to one aspect of the present invention, the first die portion may include a shaft portion arranged along the conveying width direction and a roller portion configured to be rotatable around the shaft portion, and the midstream contact surface may be formed on a peripheral surface of the roller portion.

[0021] In such a structure, the friction with respect to the side edge portion of the workpiece can be reduced.

[0022] In a bending device according to one aspect of the present invention, preferably, the first die portion further comprises a downstream abutting surface facing in an upward direction opposite to the downward direction and abutting against a side edge of the workpiece in a downstream region downstream of the midstream region in the conveying direction.

[0023] In such a structure, the downstream abutment surface presses the workpiece side edge portion in a state where the workpiece main body portion and the workpiece side edge portion overlap, thereby making it possible to bend the workpiece more reliably.

[0024] In a bending device of one form of the present invention, the second mold portion may include a pair of upstream abutment surfaces respectively arranged on both sides of the conveying width direction relative to the second belt, and the first mold portion or the second mold portion may include a pair of midstream abutment surfaces respectively arranged on both sides of the conveying width direction relative to the first belt.

[0025] In such a structure, the pair of workpiece side edge portions can be bent appropriately. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a side view schematically showing the bending device according to the first embodiment.

[0027] Figure 2 It is a top view showing the first conveying unit and the first mold unit according to the first embodiment.

[0028] Figure 3 It is a partial perspective view showing a part of the mold body part of the first mold part according to the first embodiment.

[0029] Figure 4 It is a top view showing the second conveying unit and the second mold unit according to the first embodiment.

[0030] Figure 5 It is a partial perspective view showing a part of the mold body part of the second mold part according to the first embodiment.

[0031] Figure 6 is a diagram for explaining the operation of the bending device according to the first embodiment. Figure 4 A partial cross-sectional view of the position corresponding to arrow A in FIG.

[0032] Figure 7 is a diagram for explaining the operation of the bending device according to the first embodiment. Figure 4 A partial cross-sectional view of the position corresponding to arrow B in FIG.

[0033] Figure 8 is a diagram for explaining the operation of the bending device according to the first embodiment. Figure 4 A partial cross-sectional view of the position corresponding to arrow C in FIG.

[0034] Fig. 9 is a diagram for explaining the operation of the bending device according to the first embodiment. Figure 2 A partial cross-sectional view of the position corresponding to arrow D in FIG.

[0035] Fig.10 is a diagram for explaining the operation of the bending device according to the first embodiment. Figure 2 A partial cross-sectional view of the position corresponding to arrow E in FIG.

[0036] Fig.11 is a diagram for explaining the operation of the bending device according to the first embodiment. Figure 2 A partial cross-sectional view of the position corresponding to arrow F in FIG.

[0037] Fig.12 It is a cross-sectional view showing a hook and loop fastener as an example of a workpiece.

[0038] Fig.13 It is a side view schematically showing a bending device according to a second embodiment.

[0039] Fig.14 is a diagram for explaining the operation of the bending device according to the second embodiment. Fig.13 A partial cross-sectional view of the position corresponding to arrow G in FIG.

[0040] Fig.15 is a diagram for explaining the operation of the bending device according to the second embodiment. Fig.13 A partial cross-sectional view of the position corresponding to arrow H in FIG.

[0041] Fig.16 It is a partial cross-sectional view schematically showing a bending device according to a third embodiment. DETAILED DESCRIPTION

[0042] [First embodiment]

[0043] According to the first embodiment of the present invention, Figures 1 to 11 Provide explanation.

[0044] like Figure 1 As shown, the bending device 1 of this embodiment is a device for bending the side edge portion of the workpiece W. The workpiece W is not particularly limited, and an example thereof includes a tape-shaped hook and loop fastener.

[0045] (Structure of the bending device 1)

[0046] For the structure of the bending device 1 of this embodiment, refer to Figure 1 to Figure 5 Provide explanation.

[0047] like Figure 1 As shown, the bending device 1 includes a first conveying section 10 and a second conveying section 20 for conveying the workpiece W along a conveying direction, a first mold section 30 and a second mold section 40 arranged on both sides of the up and down direction relative to the workpiece W being conveyed, and a pressing section 50 for pressing the second mold section 40 toward the first mold section 30.

[0048] Here, the bending device 1 of the present embodiment includes a bending region R which is an area in the conveying direction for bending the workpiece W, and the bending region R includes an upstream region R1, a midstream region R2, and a downstream region R3 in order from the upstream side to the downstream side in the conveying direction. In addition, the bending device 1 also includes an introduction region FR arranged at a position upstream of the bending region R, and a discharge region RR arranged at a position downstream of the bending region R.

[0049] In the following description, the conveying direction of the workpiece W is defined as the X direction, and the up-down direction orthogonal to the conveying direction is defined as the Z direction. In addition, the conveying width direction orthogonal to the conveying direction and the up-down direction is defined as the Y direction. In addition, the upstream side of the conveying direction is defined as the -X direction, and the downstream side of the conveying direction is defined as the +X direction. In addition, one side of the up-down direction (upper direction) is defined as the +Z direction, and the other side of the up-down direction (lower direction) is defined as the -Z direction.

[0050] The first conveyor 10 includes a pair of pulleys 11, 12 and a first belt 13 stretched over the pair of pulleys 11, 12. Similarly, the second conveyor 20 includes a pair of pulleys 21, 22 and a second belt 23 stretched over the pair of pulleys 21, 22. The pulleys 12, 22 are respectively driven to rotate by motors (not shown).

[0051] In the present embodiment, the first conveying unit 10 is disposed over a range including the introduction region FR to the discharge region RR, and the second conveying unit 20 is shorter than the first conveying unit 10 in the X direction and is disposed over a range including the bending region R.

[0052] In addition, the second conveying unit 20 is arranged on one side (e.g., +Z side) in the Z direction relative to the first conveying unit 10. Specifically, the lower belt portion 23A of the second belt 23 mounted on the -Z side of the pulleys 21 and 22 and the upper belt portion 13A of the first belt 13 mounted on the +Z side of the pulleys 11 and 12 are opposite in the Z direction.

[0053] The upper belt portion 13A of the first belt 13 has a workpiece contact surface 13P that can contact the workpiece W, and the lower belt portion 23A of the second belt 23 has a workpiece contact surface 23P that can contact the workpiece W. Thus, the first belt 13 and the second belt 23 can sandwich the workpiece W in the Z direction and convey the workpiece W in the X direction.

[0054] The first mold section 30 is disposed on the −Z side with respect to the upper belt portion 13A of the first belt 13 , and is formed continuously from the introduction region FR to the unloading region RR.

[0055] Specifically, if Figure 2 As shown, the first mold section 30 includes a base section 31 and a mold body section 32 .

[0056] The base portion 31 is supported by a frame member (not shown) or the like. The base portion 31 has a plate shape with the X direction as the longitudinal direction and has a width in the Y direction wider than the mold body portion 32. The base portion 31 is formed with a fitting groove 311 that opens in the +Z direction and extends along the X direction.

[0057] The mold body 32 includes a base 33 extending in the X direction and fitted in the fitting groove 311 of the base 31 , and a projection 34 protruding in the +Z direction from the center of the base 33 in the Y direction and extending in the X direction.

[0058] like Figure 3 As shown, the convex portion 34 has an upper surface 341 facing the +Z direction, and a guide groove 35 is formed on the upper surface 341, which opens in the +Z direction and guides the first belt 13 along the X direction. The upper surface 341 is arranged on the -Z side relative to the workpiece contact surface 13P of the first belt 13 arranged in the guide groove 35, and the distance from the workpiece contact surface 13P is a predetermined dimension T (for example, refer to Figure 6 ). The predetermined dimension T is preferably at the same level as the thickness of the workpiece side edge portion Wf (for example, greater than the thickness of the workpiece side edge portion Wf and less than twice the thickness).

[0059] In addition, if Figure 2 As shown, the Y-direction width D2 of each of the midstream region R2 and the downstream region R3 of the convex portion 34 is greater than the Y-direction width D1 of the upstream region R1 of the convex portion 34. Thus, an upstream opposing surface 342 facing the -X direction is formed in the midstream region R2 of the convex portion 34. In addition, the downstream region R3 of the upper surface 341 of the convex portion 34 becomes a downstream abutting surface 343 that can abut against the side edge portion Wf of the workpiece after bending.

[0060] In the midstream region R2 of the upper surface 341 of the convex portion 34, a pair of folded grooves 36A and 36B (corresponding to the grooves of the present invention) are formed on both sides of the guide groove 35 in the Y direction. Specifically, the folded grooves 36A and 36B extend in a direction inclined relative to the X direction so as to move toward the inner side of the Y direction as they move toward the +X direction. Figure 3 As shown, the fold grooves 36A and 36B penetrate the upstream facing surface 342 of the convex portion 34 and open in the +Z direction at the upper surface 341 of the convex portion 34 .

[0061] A midstream abutment surface 362 (see, for example, Fig.10 The midstream abutment surface 362 extends along the extending direction of the folded grooves 36A and 36B, and is inclined relative to the Y direction in such a manner that it moves toward the +Z direction as it moves toward the outer side of the Y direction. In addition, since the folded grooves 36A and 36B extend in such a manner that they move toward the inner side of the Y direction as they move toward the +X direction, the midstream abutment surface 362 formed at the opening edge of the folded grooves 36A and 36B also extends in such a manner that they move toward the inner side of the Y direction as they move toward the +X direction.

[0062] In addition, as described later, the side edge portion Wf of the workpiece in the middle of bending passes through the folding grooves 36A and 36B. That is, the folding grooves 36A and 36B have an opening width and depth that can accommodate the side edge portion Wf of the workpiece in the middle of bending. The depth of the folding grooves 36A and 36B may be formed to be shallower toward the inner side in the Y direction in accordance with the bending angle of the side edge portion Wf of the workpiece.

[0063] like Figure 1 As shown, the second mold section 40 is disposed on the upper side (+Z side) with respect to the lower belt portion 23A of the second belt 23, and is formed continuously from the upstream region R1 to the downstream region R3.

[0064] Specifically, if Figure 4 As shown, the second mold section 40 includes a base section 41 and a mold body section 42 .

[0065] The base portion 41 has a plate shape with the X direction as the longitudinal direction and has a width in the Y direction greater than that of the mold body portion 42. The base portion 41 is formed with a fitting groove 411 that opens in the -Z direction and extends in the X direction.

[0066] The mold body 42 extends along the X direction and is fitted into the fitting groove 411 of the base 41. Figure 5 As shown in FIG. 1 , a receiving groove 43 is formed in the mold body 42, which is open in the -Z direction and extends in the X direction. In other words, the mold body 42 has a bottom 44, and a pair of side walls 45A and 45B that protrude from the bottom 44 in the -Z direction and face each other in the Y direction. In addition, the convex portion 34 of the first mold part 30 is arranged in the receiving groove 43 of the mold body 42, that is, between the pair of side walls 45A and 45B (see, for example, FIG. 1 ). Figure 6 ).

[0067] The bottom portion 44 has a bottom surface 441 facing the -Z direction, and a guide groove 46 is formed on the bottom surface 441, which opens in the -Z direction and guides the second belt 23 along the X direction. The bottom surface 441 is arranged at a position slightly closer to the +Z side than the workpiece contact surface 23P of the second belt 23 arranged in the guide groove 46 (for example, see Figure 6 ).

[0068] like Figure 5As shown, a notch shape extending in the X direction is formed in the upstream region R1 of the inner side surface of the storage groove 43 (i.e., the inner side surface 451 of the side wall portions 45A and 45B), and the upstream abutment surface 452 and the inclined inner side surface 453 are formed by using the notch shape. The upstream abutment surface 452 faces the -Z direction and is inclined relative to the X direction in a manner that the more it goes toward the +X direction, the more it is inclined toward the -Z direction. The inclined inner side surface 453 faces the inner side of the Y direction and is inclined relative to the X direction in a manner that the more it goes toward the X direction, the more it is inclined toward the inner side of the Y direction. In addition, the Y direction width of the upstream abutment surface 452 and the Z direction width of the inclined inner side surface 453 decrease as they go toward the X direction.

[0069] In addition, if Figure 4 As shown in FIG. 1 , a pair of ventilation holes 47 are formed in the downstream region R3 of the second mold portion 40. The pair of ventilation holes 47 are opened on both sides of the Y direction relative to the guide groove 46. In addition, the ventilation holes 47 are connected to an external air supply source, and the air supplied from the air supply source is blown toward the side edge Wf of the workpiece in the storage groove 43 through the ventilation holes 47 (refer to FIG. 1 ). Fig.11 ).

[0070] like Figure 1 As shown in the figure, the pressing part 50 includes: a bolt part 51, which passes through the bolt hole 417 of the base part 41 and is threadedly engaged with the base part 31; a washer 52, which is arranged on the upper surface of the base part 41; a nut part 53, which is threadedly engaged with the bolt part 51; and a coil spring 54, which is arranged between the washer 52 and the nut part 53 and is covered with the bolt part 51. The coil spring 54 is arranged in a compressed state, and the first mold part 30 is pressed toward the second mold part 40 side by the elastic force of the coil spring 54.

[0071] In addition, in this embodiment, a total of four pressing parts 50 are arranged. Figure 4 Four bolt holes 417 corresponding to the arrangement of four pressing portions 50 are illustrated in FIG.

[0072] In addition, if Figure 1 As shown, the bending device 1 of this embodiment may further include a heating unit 60 disposed on the -X side of the second conveying unit 20. The heating unit 60 is, for example, a heater, and heats the workpiece W to be introduced between the first belt 13 and the second belt 23.

[0073] (Workpiece)

[0074] Reference Fig.12 The hook and loop fastener 9 as an example of the workpiece W according to the present embodiment will be briefly described.

[0075] The hook and loop fastener 9 includes a resin base material 90 having a first surface 91 and a second surface 92 in a front-back relationship, and a plurality of engaging elements 93 protruding from the first surface 91 of the base material 90 .

[0076] The base material 90 includes a main body 94 having a strip shape and a plurality of engaging elements 93 provided on the main body 94, and side edges 95A and 95B extending outward in the width direction from the main body 94. The main body 94 corresponds to the workpiece main body Wb, and the side edges 95A and 95B correspond to the workpiece side edges Wf.

[0077] In the hook and loop fastener 9 , the side edge portions 95A and 95B of the base material 90 are bent toward the second surface 92 with respect to the main body portion 94 of the base material 90 , thereby forming a flange shape.

[0078] Here, the angle formed between the second surface 92 of the main body 94 and the second surface 92 of the side edges 95A, 95B (ie, the bending angle θ of the side edges 95A, 95B) is not particularly limited, but is preferably 90±10 degrees, and more preferably less than 90 degrees.

[0079] In addition, not only the plurality of engagement elements 93 but also the plurality of wall portions 96 , the plurality of magnetic elements 97 and the like may be formed on the main body portion 94 of the base material 90 .

[0080] (Bending Process)

[0081] The bending process performed by the bending device 1 of this embodiment will be described. In the following description, the workpiece W to be bent is the hook and loop fastener 9. Figure 6 to Figure 11 In order to simplify the drawings, only the schematic appearance of the hook and loop fastener 9 is shown.

[0082] First, if Figure 1 As shown, the hook and loop fastener 9 is supplied to the bending device 1 along the length direction and enters the introduction area FR in a state of being placed on the first belt 13. At this time, the hook and loop fastener 9 is placed in the following posture: the substrate 90 is arranged along the XY plane, the first surface 91 of the substrate 90 faces the +Z direction, and the second surface 92 of the substrate 90 faces the -Z direction (for example, refer to Figure 6 ) In addition, the side edges 95A and 95B of the hook and loop fastener 9 are arranged so as to protrude outward in the Y direction from the first tape 13 and the second tape 23 .

[0083] In addition, it is preferable that the heating unit 60 heats the vicinity of the side edge portions 95A and 95B of the fastening tape 9 in the introduction region FR to increase the flexibility of the bent portion.

[0084] Next, the first tape 13 and the second tape 23 together convey the hook and loop fastener 9 in the X direction. At this time, the first tape 13 and the second tape 23 convey the hook and loop fastener 9 in the X direction while sandwiching the main body 94 (and the engaging elements 93, etc.) of the hook and loop fastener 9.

[0085] In the Velcro 9 is from Figure 1 When the lead-in area FR in the upstream area R1 is transported, Figure 6 As shown, each upstream contact surface 452 of the second mold portion 40 contacts the side edge portions 95A and 95B of the hook and loop fastener 9. Figure 7 As shown, as the hook and loop fastener 9 is conveyed in the upstream region R1, each upstream contact surface 452 pushes the side edges 95A and 95B in the -Z direction to bend the side edges 95A and 95B. As a result, the side edges 95A and 95B are in a state of standing up toward the second surface 92 side (i.e., downward direction) relative to the main body 94. Figure 8 As shown, at the end point of the upstream region R1 , the bending angle θ of the side edge portions 95A, 95B becomes 90 degrees.

[0086] In addition, when the hook and loop fastener 9 is Figure 1 When transporting from the upstream region R1 to the midstream region R2, Fig. 9 As shown, the side edges 95A and 95B of the hook and loop fastener 9 are inserted into the folding grooves 36A and 36B of the first mold part 30. At this time, the side edges 95A and 95B of the hook and loop fastener 9 abut against the inner side surfaces of the folding grooves 36A and 36B and are separated from the midstream abutment surface 362.

[0087] And, if Fig.10 As shown, as the hook and loop fastener 9 is conveyed in the midstream region R2, the midstream abutment surfaces 362 of the folding grooves 36A and 36B push the side edges 95A and 95B inward in the Y direction, further bending the side edges 95A and 95B. As a result, the side edges 95A and 95B are bent until they are in a state opposite to the main body 94 (for example, until the bending angle θ of the side edges 95A and 95B is less than 90 degrees). In addition, the depth and width of the folding grooves 36A and 36B are set so that the top ends of the side edges 95A and 95B bent in the midstream region R2 do not contact the bottom surface and inner side surface of the folding grooves 36A and 36B.

[0088] In this embodiment, at the end of the midstream region R2, the bending angle θ of the side edges 95A and 95B becomes 0 degrees (see Fig.11 ). That is, the side edge portions 95A and 95B are in a state of overlapping with the main body portion 94.

[0089] In addition, if Fig.11As shown, in the downstream region R3, the hook and loop fastener 9 is conveyed while the side edges 95A, 95B are overlapped with the main body 94. During this conveyance, the downstream contact surface 343 presses the side edges 95A, 95B of the hook and loop fastener 9.

[0090] Moreover, in the downstream region R3, air is blown toward the side edge portions 95A and 95B of the fastener 9 through the ventilation holes 47 of the second mold portion 40. Thus, the vicinity of the side edge portions 95A and 95B is cooled.

[0091] After that, the hook and loop fastener 9 fed by the first belt 13 and the second belt 23 enters the unloading area RR in a state of being placed on the first belt 13, and is unloaded to the next step. Thus, the bending process of the hook and loop fastener 9 is completed.

[0092] In addition, the hook and loop fastener 9 is plastically deformed due to the above-mentioned bending process, but it is also possible to have a bending recovery such as rebound. For example, in the present embodiment, it is pre-conceived that the hook and loop fastener 9 will have a bending recovery, and the bending angle θ of the side edge portions 95A and 95B realized based on the bending process is set to 0 degrees, thereby obtaining a target of a bending angle θ of about 90 degrees after the bending recovery.

[0093] (Effects of this embodiment)

[0094] As described above, the bending device 1 of the present embodiment includes: the first belt 13 that conveys the workpiece W along the X direction (conveying direction); the second belt 23 that sandwiches the workpiece W between the first belt 13 and conveys the workpiece W together with the first belt 13; the first die section 30 that faces the workpiece W across the first belt 13; and the second die section 40 that faces the workpiece W across the second belt 23 and faces the first die section 30. The second die section 40 has a pair of upstream abutment surfaces 452 that are inclined with respect to the X direction so as to move toward the downward direction (-Z direction) as it moves toward the +X direction (downstream side in the conveying direction). The first die section 30 has a pair of midstream abutment surfaces 362 that are inclined with respect to the Y direction (conveying width direction) so as to move toward the -Z direction as it moves toward the inner side in the Y direction (inner side in the conveying width direction) at a position below the workpiece abutment surface 13P of the first belt 13.

[0095] In such a structure, when the workpiece W is transported by the first belt 13 and the second belt 23, in the upstream region R1, the upstream abutment surface 452 pushes the workpiece side edge Wf in the -Z direction, bending the workpiece side edge Wf. As a result, the workpiece side edge Wf is in a state of standing up in the downward direction relative to the workpiece main body Wb. Afterwards, in the midstream region R2, which is a region lower than the workpiece abutment surface 13P of the first belt 13, the midstream abutment surface 362 pushes the workpiece side edge Wf, further bending the workpiece side edge Wf. As a result, the workpiece side edge Wf is bent until it becomes opposite to the workpiece main body Wb (for example, until the bending angle θ of the workpiece side edge Wf is less than 90 degrees).

[0096] Here, during the conveyance of the workpiece W, the workpiece body Wb sandwiched by the first belt 13 and the second belt 23 is arranged along an imaginary plane parallel to the X direction and the Y direction, respectively, and the workpiece side edge Wf is bent from a posture along the imaginary plane in a manner opposite to the workpiece body Wb to a posture inclined relative to the Y direction. The midstream abutment surface 362 is inclined relative to the Y direction, so it is easy to ensure the pressing area for the workpiece side edge Wf. As a result, the workpiece W can be reliably bent.

[0097] In addition, the bending device 1 of this embodiment does not use a plurality of rollers as in the prior art, so the number of parts can be reduced, and the cost of managing parts can be reduced. In addition, troubles such as the workpiece W being caught between a plurality of rollers can be avoided.

[0098] Furthermore, the bending device 1 of the present embodiment performs bending processing while clamping the workpiece W with the first belt 13 and the second belt 23, and thus can perform bending processing while stably conveying the workpiece W. For example, even if the workpiece W has a notch shape, the workpiece W can be bent without tearing the workpiece W.

[0099] In this embodiment, the first die portion 30 has an upper surface 341 facing the second die portion 40, folding grooves 36A and 36B formed on the upper surface 341 and through which the workpiece side edge Wf can pass, and a midstream abutment surface 362 is formed on the opening edges of the folding grooves 36A and 36B.

[0100] In such a configuration, the length of the midstream abutment surface 362 in the X direction can be adjusted according to the length of the folding grooves 36A and 36B in the X direction. Thus, the length of the folding section formed by the midstream abutment surface 362 can be easily adjusted.

[0101] In the present embodiment, the fold grooves 36A and 36B extend toward the inner side in the Y direction as they go toward the +X direction, and the midstream contact surface 362 extends along the extending direction of the fold grooves 36A and 36B.

[0102] In such a structure, the bending angle θ of the workpiece side edge portion Wf can be adjusted according to the extending direction of the folding grooves 36A and 36B. For example, the bending angle θ of the workpiece side edge portion Wf can be made smaller as the folding grooves 36A and 36B extend inward in the Y direction.

[0103] In the present embodiment, the first die portion 30 includes, in the downstream region R3 , a downstream contact surface 343 that faces the +Z direction and contacts the workpiece side edge portion Wf.

[0104] In such a structure, the downstream contact surface 343 presses the workpiece side edge portion Wf in a state where the workpiece body portion Wb and the workpiece side edge portion Wf overlap.

[0105] In this embodiment, the second mold section 40 includes a pair of upstream abutment surfaces 452 arranged on both sides of the second belt 23 in the Y direction, and the first mold section 30 includes a pair of midstream abutment surfaces 362 arranged on both sides of the first belt 13 in the Y direction.

[0106] In such a structure, the pair of workpiece side edge portions Wf can be bent appropriately.

[0107] [Second embodiment]

[0108] Regarding the second embodiment of the present invention, refer to Figure 13 to Figure 15 Provide explanation.

[0109] like Fig.13 As shown, the bending device 1A of this embodiment is formed substantially the same as the first embodiment, but the structure of the first die portion 30A is different from that of the first embodiment. In the following description, the same reference numerals are attached to the structures having the same functions as the first embodiment, and the description thereof is omitted or simplified.

[0110] The first mold section 30A includes an upstream mold main body 321 and a downstream mold main body 322, which replace the mold main body 32 of the first embodiment. The upstream mold main body 321 and the downstream mold main body 322 are substantially the same as the structure obtained by dividing the mold main body 32 of the first embodiment into the upstream side and the downstream side. Specifically, the upstream mold main body 321 is arranged from the introduction area FR to the upstream area R1, and the downstream mold main body 322 is arranged from the downstream area R3 to the unloading area RR. However, the folding grooves 36A and 36B of the first embodiment are not formed in the upstream mold main body 321 and the downstream mold main body 322.

[0111] The first mold section 30A of the present embodiment includes a shaft section 37 disposed along the Y direction between the upstream mold body section 321 and the downstream mold body section 322 (ie, the midstream region R2 ), and a roller section 38 rotatable about the shaft section 37 .

[0112] like Fig.14 As shown in FIG. 1 , a concave portion is formed along the circumferential direction on the circumferential surface of the roller portion 38. Thus, the circumferential surface of the roller portion 38 has a bottom 381 and a pair of inclined surfaces 382 arranged on the outer side in the Y direction relative to the bottom 381. The inclined surfaces 382 are inclined with respect to the Y direction so as to be farther away from the shaft portion 37 as they go toward the outer side in the Y direction.

[0113] Here, the first belt 13 is arranged on the +Z side relative to the bottom 381 of the roller portion 38. The regions of the inclined surface 382 of the roller portion 38 arranged on both sides of the Y direction relative to the first belt 13 constitute a midstream abutment surface 362A inclined relative to the Y direction in a manner that the more it goes toward the outer side in the Y direction, the more it goes upward.

[0114] The mold body portion 42A of the second mold portion 40A is substantially the same as the mold body portion 42 of the first embodiment, but is configured so that a portion of the roller portion 38 on the +Z side can be arranged in the housing groove 43 .

[0115] The bending process performed by the bending apparatus 1A of the second embodiment will be mainly described with respect to the points different from the first embodiment. In the following description, the above-mentioned hook and loop fastener 9 is used as the workpiece W to be bent.

[0116] As with the first embodiment, in the upstream region R1, the upstream abutment surface 452 pushes the workpiece side edge Wf in the -Z direction, thereby bending the workpiece side edge Wf in such a manner that the bending angle becomes 90 degrees. In the midstream region R2, the midstream abutment surface 362A of the roller portion 38 is formed to be inclined toward the bottom 381 from a position closer to the outside in the Y direction than the position of the workpiece side edge Wf bent in the upstream region R1. Therefore, when the hook and loop fastener 9 is transported in the midstream region R2, as shown in FIG. Fig.14 As shown, the midstream contact surface 362A of the roller portion 38 presses the side edge portions 95A and 95B of the fastener 9 inward in the Y direction to bend the side edge portions 95A and 95B.

[0117] In the present embodiment, as the hook and loop fastener 9 passes through the roller portion 38 , the bending angle θ of the side edge portions 95A and 95B becomes 45 degrees.

[0118] In addition, when the hook and loop fastener 9 is carried in the downstream region R3, Fig.15As shown, the side wall portions 45A and 45B of the second mold portion 40A abut against the side edge portions 95A and 95B, thereby suppressing the bending recovery of the side edge portions 95A and 95B. Fig.15 In the example shown, the bending angle θ is suppressed from exceeding 90 degrees.

[0119] After that, the hook and loop fastener 9 fed by the first belt 13 and the second belt 23 enters the unloading area RR in a state of being placed on the first belt 13, and is unloaded to the next step. Thus, the bending process of the hook and loop fastener 9 is completed.

[0120] In the bending device 1A of the present embodiment, as in the first embodiment, the midstream abutment surface 362A is inclined relative to the Y direction, so that it is easy to ensure the pressing area on the workpiece side edge Wf. Thus, the workpiece W can be reliably bent until the workpiece side edge Wf is opposite to the workpiece body Wb.

[0121] Furthermore, in the present embodiment, since the roller portion 38 includes the midstream contact surface 362A, the friction with respect to the workpiece W can be reduced.

[0122] [Third embodiment]

[0123] Regarding the third embodiment of the present invention, refer to Fig.16 Provide explanation.

[0124] like Fig.16 As shown, the bending device of the third embodiment is formed in substantially the same manner as the first embodiment, and the difference from the structure of the first embodiment is that the midstream abutting surface 481 is formed in the second mold part 40B instead of the first mold part 30B. In addition, in the following description, the same reference numerals are attached to the structures having the same functions as those of the first embodiment, and the description thereof is omitted or simplified.

[0125] Specifically, the Y-direction width of the convex portion 34 of the mold body portion 32B of the first mold portion 30B is smaller than that of the mold body portion 32 of the first embodiment. The folding grooves 36A and 36B of the first embodiment are not formed in the convex portion 34 .

[0126] The mold body 42B of the second mold part 40B has a bottom 44, a pair of side walls 45A and 45B that protrude from the bottom 44 in the −Z direction and face each other in the Y direction, and protrusions 48 that protrude from the pair of side walls 45A and 45B inward in the Y direction.

[0127] Here, the protrusion 48 is arranged with a gap between the convex portion 34 and the first belt 13 in the Y direction. A midstream abutment surface 481 is formed at the protruding tip of the protrusion 48 at a position closer to the -Z direction than the workpiece abutment surface 13P of the first belt 13. The midstream abutment surface 481 is inclined relative to the Y direction so as to move toward the +Z direction as it moves toward the outer side in the Y direction.

[0128] In the third embodiment, as in the first embodiment, the midstream contact surface 481 is inclined relative to the Y direction, so that it is easy to ensure the pressing area on the workpiece side edge Wf. Thus, the workpiece W can be reliably bent until the workpiece side edge Wf faces the workpiece body Wb.

[0129] [Modifications]

[0130] In the above embodiments, the hook and loop fastener 9 is exemplified as the workpiece W, but the workpiece W is not limited to the hook and loop fastener 9 and may be any workpiece. In addition, the material of the workpiece W is preferably resin, but the present invention is not limited thereto and may be any material.

[0131] In the above-mentioned embodiments, the bending devices 1 and 1A have a structure for bending a pair of workpiece side edges Wf, but the present invention is not limited thereto. That is, the bending devices 1 and 1A may also have a structure for bending either one of the pair of workpiece side edges Wf. In this case, the upstream abutment surface 452, the midstream abutment surface 362, 362A, 481, etc. may be formed on one side of the bending devices 1 and 1A in the Y direction.

[0132] In the above-mentioned embodiments, the first mold sections 30, 30A, 30B are formed from the introduction region FR to the unloading region RR, and the second mold sections 40, 40A, 40B are formed from the upstream region R1 to the downstream region R3, but the present invention is not limited thereto. That is, the first mold sections 30, 30A, 30B and the second mold sections 40, 40A, 40B may be formed at least from the upstream region R1 to the midstream region R2.

[0133] In the above-mentioned embodiments, the vertical relationship between the first conveying unit 10 and the second conveying unit 20 and the vertical relationship between the first mold unit 30, 30A, 30B and the second mold unit 40, 40A, 40B may be reversed. In addition, the pressing unit 50 may be configured to apply pressure to the second mold unit 40, 40A, 40B instead of the first mold unit 30, 30A, 30B.

[0134] Description of Reference Numerals

[0135] 1, 1A, bending device; 10, first conveying part; 11, 12, pulley; 13, first belt; 13A, upper belt portion; 13P, workpiece contact surface; 20, second conveying part; 21, 22, pulley; 23, second belt; 23A, lower belt portion; 23P, workpiece contact surface; 30, 30A, 30B, first die portion; 31, pedestal portion; 311, fitting groove; 32, 32B, die main body portion; 321 , upstream side mold body; 322, downstream side mold body; 33, base; 34, convex portion; 341, upper surface; 342, upstream opposite surface; 343, downstream abutment surface; 35, guide groove; 36A, 36B, folding groove; 362, 362A, midstream abutment surface; 37, shaft; 38, roller; 381, bottom; 382, ​​inclined surface; 40, 40A, 40B, second mold portion; 41, pedestal portion; 41 1. Fitting groove; 417. Bolt hole; 42, 42A, 42B. Main body of mold; 43. Receiving groove; 44. Bottom; 45A, 45B. Side wall; 451. Inner side; 452. Upstream abutting surface; 453. Inclined inner side; 46. Guide groove; 47. Ventilation hole; 48. Protrusion; 481. Midstream abutting surface; 50. Pressing portion; 51. Bolt portion; 52. Washer; 53. Nut portion; 54. Screw Spring; 60, heating part; 9, Velcro; 90, base material; 91, first surface; 92, second surface; 93, engaging element; 94, main body; 95A, 95B, side edge; 96, wall; 97, magnetic element; FR, introduction area; R, bending area; R1, upstream area; R2, midstream area; R3, downstream area; RR, unloading area; W, workpiece; Wb, main body of workpiece; Wf, side edge of workpiece.

Claims

1. A bending device, wherein: The bending device has: a first belt (13) for conveying the workpiece (W) along a conveying direction; a second belt (23) which sandwiches the workpiece (W) between the first belt (13) in a vertical direction perpendicular to the conveying direction and conveys the workpiece (W) along the conveying direction together with the first belt (13); a first mold portion (30, 30A, 30B) which is opposed to the workpiece (W) in the up-down direction via the first belt (13); a second mold portion (40, 40A, 40B) which is opposed to the workpiece (W) in the vertical direction via the second belt (23) and is opposed to the first mold portion (30, 30A, 30B) in the vertical direction; and a pressing portion (50) for pressing the first mold portion (30, 30A, 30B) or the second mold portion (40, 40A, 40B) in a direction in which the first mold portion (30, 30A, 30B) and the second mold portion (40, 40A, 40B) approach each other in the vertical direction, The second mold portion (40, 40A, 40B) has at least one upstream abutting surface (452) in an upstream region (R1) in the conveying direction for abutting against a workpiece side edge portion (Wf) of the workpiece (W) protruding from the first belt (13) and the second belt (23) in a conveying width direction, and the conveying width direction is orthogonal to the conveying direction and the up-down direction, respectively. The first mold part (30, 30A) or the second mold part (40B) has at least one midstream abutting surface (362, 362A, 481) abutting against the side edge (Wf) of the workpiece in a midstream region (R2) that is downstream of the upstream abutting surface (452) in the conveying direction. When the direction from the second belt (23) toward the first belt (13) in the up-down direction is regarded as the down direction, The upstream abutment surface (452) is inclined relative to the conveying direction in such a manner that it goes downward as it goes toward the downstream side of the conveying direction. The midstream abutment surface (362, 362A, 481) is inclined relative to the conveying width direction at a position closer to the downward direction than the workpiece abutment surface (13P) of the first belt (13) in such a manner that it goes more downward toward the inner side of the conveying width direction.

2. The bending device according to claim 1, wherein: The first mold part (30) has: an upper surface (341) facing in an upward direction, which is opposite to the downward direction; and at least one groove (36A, 36B) formed on the upper surface (341) and capable of allowing the side edge portion (Wf) of the workpiece to pass through, The midstream abutment surface (362) is formed at the opening edge of the groove (36A, 36B).

3. The bending device according to claim 2, wherein: The grooves (36A, 36B) extend inwardly in the conveying width direction as they go downstream in the conveying direction. The midstream abutment surface (362) extends along the extension direction of the grooves (36A, 36B).

4. The bending device according to claim 1, wherein: The first mold part (30A) comprises: an axis portion (37) arranged along the conveying width direction; and The roller portion (38) is configured to be rotatable around the shaft portion (37). The midstream abutment surface (362A) is formed on the peripheral surface of the roller portion (38).

5. The bending device according to any one of claims 1 to 4, wherein: The first mold portion (30) further comprises a downstream abutting surface (343) facing the upper direction opposite to the downward direction and abutting against the side edge portion (Wf) of the workpiece in a downstream region (R3) which is closer to the downstream side of the conveying direction than the midstream region (R2).

6. The bending device according to any one of claims 1 to 5, wherein: The second mold portion (40, 40A, 40B) includes a pair of upstream abutment surfaces (452) respectively arranged on both sides of the conveying width direction relative to the second belt (23). The first die portion (30, 30A) or the second die portion (40B) includes a pair of midstream abutment surfaces (362, 362A, 481) respectively arranged on both sides of the conveying width direction relative to the first belt (13).

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