KR100489370B1 - Eyelet for reinforcing the edge of a hole in a carrier strip and device for attaching an eyelet to a carrier strip - Google Patents

Abstract

The present invention relates to a discless hinge 10 'comprising a plate 11 arranged on the front face 23 of a carrier strip 20 and a tubular neck through a hole in the carrier strip. The neck flange of the hinge component 10 ′ is supported at the rear face 24 of the carrier strip 20. It is an object of the present invention to connect the stops to the carrier strip 20 faster and at lower cost. To achieve this, a protrusion 16 is provided at the free end of the neck of the stop component 10 '. When the neck is flanged, a closed ring forming portion 50 is formed in which the neck protrusion 16 is integrated. After finishing the flanging, pressure points 40 are formed between the support surface 49 formed by the plate 11 and the neck protrusions 16 formed on the carrier strip, and the pressure points are formed in the carrier strip ( 20) is firmly supported. The carrier strip 20 extends beyond the pressure point 40, so to speak, inside the ring formation 50. The hinge is obtained using only one individual hinge part 10 ', which is arranged in the carrier strip 20 with a very high tear strength.

Description

A hinge for reinforcing the edge of a hole in a carrier strip and a device for attaching a hinge to a carrier strip EYELET FOR REINFORCING THE EDGE OF A HOLE IN A CARRIER STRIP AND DEVICE FOR ATTACHING AN EYELET TO A CARRIER STRIP}

The invention first relates to a stop in the manner described in the preamble of claim 1.

Two-piece hinges are known, which are arranged on opposite sides of the carrier strip and consist of first and second disc components clamped together in a sandwiched manner in the flanging of the carrier strip. It is also known to have a one-piece stopper (US 2,107,375 A) formed without a single stopper part. Grooves are formed at the front end of the hinge component neck, and these grooves show radial expansion between the axial protrusions. In the flanging of the hinge part, a C-shaped part is formed between the neck and the plate, wherein the radial extension is supported on the back side of the carrier strip. The carrier strip then extends radially into the interior of the C-shaped portion. The pulley strength (Anziehfestigkeit) of these known apertures is limited. In an integral aperture formed of an aperture collar with a semicircle profile and an aperture neck with a V-shaped cross section circulating homogeneously in the neck end face (EP 0). 673 611 A2), the C-shaped formation is closed until the carrier strip is tightened in the gap between the outer edge of the collar of the collar and the end face of the collar of the collar. The semicircle inside of the collar collar is divided into one inner groove and one outer groove by circulating ring ribs, in which case the ring ribs sporadically support the tips. The transition region between the aperture neck and the aperture collar is provided with a conical stabilizing rib that prevents the flanging of the region. After flanging the remaining length of the neck, the end face of the hinge neck aligns only with the outer groove of the hinge collar. Inside the C-shaped portion there is provided a labyrinth for the carrier strip. The tip of the ring rib may allow the carrier strip to be secured against torsion, but the tear strength of the carrier strip is insufficient. The reason is that the upper surface of the carrier strip is only contacted by the outer edge of the collar of the carrier and the lower surface of the carrier strip is only contacted by the end surface of the collar of the hinge. In addition, the integral clamp (DE 299 03 124 U1) In this case, it is known that the free end of the neck is cut into the clip-shaped individual fastening member in the flanging die and bend outward in the radial direction. For this purpose an annular ring of expansion recesses is provided at the bottom of the flanged die, which are separated from each other by cutting edges facing the upper die. After the fastening members have been attached to the carrier strip, they form a V-shaped folded article with the aperture plate in cross section. Carrier strips clamped between the V-shaped legs are not sufficiently secured in the folded fabric.

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1 and 2 are plan views of the front and rear surfaces of a carrier strip equipped with a stop according to the present invention, respectively.

3 is an enlarged view of a cross-sectional view taken along the cutting line III-III of FIG. 1 of the attachment hole shown in FIG. 1.

4 is an axial cross-sectional view of the unique hinge component of the discless aperture according to the invention in its initial state, ie before being processed in a carrier strip.

FIG. 5 is an enlarged view of the smooth bends of a portion of the edge region of the fastener component according to the invention, indicated by numbers in FIG.

FIG. 6 is an axial half sectional view of a fragment of the detachable device according to the invention for the machining of the fastener component shown in FIG. 4, wherein the upper die lies facing the lower die at the upper end of the stroke movement of the lower die. FIG. have.

It is an object of the present invention to develop a hinge in the manner set forth in the preamble of claim 1, which can be attached quickly and at low cost and has a high tear strength (제공된: Reissfestigkeit) once provided to the carrier strip. This object is achieved through the features described in claim 1 of the present invention and the importance of these features is explained below.

In the present invention, a ring forming portion is formed which extends to form a complete circle even when flanging the neck, because the actual neck length is actually spirally rolled into the ring. The ring forming portion includes a protrusion provided at an end of the neck. As a result, the spirally rolled ring formation creates a specific pressure point of the carrier strip that is tightly snapped, thereby obtaining a considerable resistance to the tensile stress applied to the carrier strip. These pressure points are formed because the protrusion of the ring-shaped neck spirally pressed against the bearing surface formed by the plate of the hinge or by the transition between the plate and the neck. The carrier strip is matched to the ring forming portion and to the protrusion of the neck being rolled into the ring forming in a ring segment manner, and compressed into a sandwich between the ring surface and the helical surface. The carrier strip extends through the pressure point inside the ring formation to the edge of the hole. The helically curled projection of the neck end faces inside the ring formation and is oriented to counter the tensile stress that occurs during use of the carrier strip. A stepped ridge of strip material appears in front of these area compression points, which substantially improves the bite effect at the pressure point against the stresses acting on the carrier strip. By spirally curling the neck end, neat riveting is achieved without the user having to be afraid of injury. The stopper according to the invention has a much higher tensile resistance than the prior art described in the introduction.

Compared to the very expensive detachable apertures, much higher tear strength is obtained in the present invention, ie 30% to 75% higher strength. This may especially be the case in carrier strips, which until now have been at a very dangerous (critically) flexibility or elasticity so that integral clasps could not be used. In the present invention, due to the integral nature, the disk parts are saved, thereby saving material, storage and transportation costs, and less manual work during the attaching operation. In the present invention, the integral fastener enables rapid processing, which reduces the cost of attaching the fastener. It is only necessary to make the neck of the fastener component according to the present invention sufficiently long in consideration of the ring forming part in the flanging process. Of course, the thickness of the carrier wall must also be taken into account. In this case it is only necessary to arrange the axial or radial projections which can be formed in different ways at the free end of the neck.

There is a method in which the protrusions are formed, for example, through radial openings in the tube wall of the neck. In the flanging of the neck, the radial protrusion passes into the tightly fixed hole edge region of the carrier strip, where it is pressed to form a pressure point in the plate with respect to the opposing backing surface. However, depending on the method of manufacture, it is simpler to make another method, ie to form the protrusions in the axial direction. For this purpose it is appropriate for the end edge of the neck to be toothed or wavy as described in claim 2. In this case the entire edge of the neck is continuously profiled and does not have sporadic protrusions which are spaced apart from each other, as in the prior art mentioned in the introduction. As the teeth enter into the strip material during flanging during the formation of the ring mold, not only the teeth between the teeth and the bearing surface of the plate are tightened but also a tight coupling between the teeth and the carrier strip occurs. The greater the tensile force exerted on the carrier strip, the more reliably the teeth penetrate into the carrier strip. This explains that the fastener according to the invention has an extremely high tear strength.

The invention also relates to a device for attaching a stop according to the invention. Features appearing in this device are set forth in claim 10. In the known device for attaching a stop to a flexible carrier strip such as a canvas, pull-ups (Vorziehzapfen) on the front of the central insert moving axially in the upper die are used. This allows for larger holes in the carrier strip to be cut in the flanging stroke of both die parts, resulting in smooth riveting with the disc part. The invention is implemented in a completely different way.

It is therefore a further object of the present invention to develop a device for the integral stop referred to in claim 1, which can be neatly fixed not to be torn on the carrier strip. This object is achieved through the measures mentioned in the characterizing part of claim 9 of the present invention, the importance of which is explained below. In the present invention, the upper die, which is subjected to a force load in the opposite direction to the compression ring in the lower die, The corresponding compression ring of is assigned. In this case, according to claim 10, it is preferred that the two rings have an inclined surface facing each other and a corresponding inclined surface. During the stroke movement of the two dies a carrier strip is sandwiched between the two rings, wherein the inclined surfaces are used to pull the carrier strip further flat. As a result, the flat shape of the carrier strip is maintained during the subsequent fusing of the unitary aperture, thereby completely fixing the aperture to the carrier strip. Material movement is minimized as the carrier strip is fixed. As a result, the division spacing between the stops can be maintained accurately, and the allowable deviation is considerably reduced due to the long plane length.

Other measures and advantages of the invention are set forth in the dependent claims, the description below and the figures. In the drawings, the invention is illustrated in one embodiment.

The stop should reinforce the edge region 21 of the cut hole 22 in the carrier strip 20, as shown in FIGS. 1 and 2. The carrier strip 20 is in principle flexible, in some cases elastically elastic, for example an automobile canvas. The present invention achieves the desired hole reinforcement using an integral stop fitting. 4 and 5 show the hinge part 10 in its initial state before being machined. In contrast, FIGS. 1, 2 and 3 show a fastener component 10 ′ having a hole reinforcing action in a finished use state after processing is completed.

The hinge component 10 can be divided into an arcuate plate 11 extending radially and a tubular neck 12 extending axially. The plate 11 has an arcuate formation 13 for the purpose of better intrinsic stability and ring flanging of the neck 12 which will be described in more detail. The result is a very unique arc transition 14 formed between the plate 11 and the neck 12. The neck has a projection 16 at its free end 15 which extends axially, ie in the direction of extension of the neck 12. These protrusions here consist of an end edge 17 which is serrated in arc form as seen in FIG. 5. The end edge has a unique shape as follows.

 The tooth tip 17 has a convex bend 27, while the tooth space 18 has a concave bend 28. As a result, a wavy form is formed from the tooth forming portion 19. This wave form is formed asymmetrically. That is, the radius of curvature of the curved portion 27 of the tooth tip 17 is smaller than the radius of curvature of the curved portion 28 of the tooth groove.

This hinge part 17 is attached to the carrier strip 20 in the device 30 shown in FIG. 6. The device 30 consists of five parts which move axially with each other in time. This firstly belongs to the lower die 32 which in this case is stationary, which supports the compression ring 34 which is axially passively moved thereto. Also included in the device 30 is an upper die 31 which is actively moving relative to the lower die 32, which is also passively axially moved relative thereto and within the upper die 31. It has a central insert 33 arranged concentrically. As a result, the circumferential region of the upper die 31 is surrounded by a corresponding compression ring 54 which also moves passively in the axial direction. The center insert 33 and the corresponding compression ring 54 are subjected to a force load on the lower die 32 in relation to the force arrows 35 or 55, while the compression ring 34 in the lower die 32 In its inclined form, a plurality of springs 56 mounted in the axial bore of the lower die 32 are acted upon the upper die 31 in relation to the force arrows 36. These springs 56 are formed as threaded coil springs, with the pins 57 provided on the compression ring 34 meshing inside the threads of the springs. One die group 31, 33, 54 and the other die group 32, 34 are stroked against each other, as shown by the direction of movement arrow 37 of the upper die group 31, 33, 54. Do it.

The corresponding compression ring 54 is formed on the circumferential surface 63 of the upper die 31. The force load 55 of the corresponding compression ring 54 is supported by the compression spring 64 supported between the edge of the circumferential flange 65 of the upper die 31 and the contact surface of the groove 66 in the corresponding compression ring 54. Is caused by. The pushing position of the corresponding compression ring 54 is determined by an end stopper. This stop device consists of a head 67 of a plurality of guide rods 68 whose length can be adjusted by a screw engaging portion 69 and a lock nut 71. This rod head 67 is supported by the upper edge of the flange 65 when it is stationary. This establishes the desired propulsion length 70 of the corresponding compression ring 54 in relation to the upper die 31.

In FIG. 6, as already described above, an upper turning point of the stroke movement 37 is shown, in which the upper die 31 is arranged with a maximum stroke distance 38 relative to the lower die 32. do. Thereby, the hinge part 10 can be easily inserted into the receiving formation of the upper die 31 and the center insert 33. The upper die 31 has for this purpose an accommodating portion 39 (corresponding to the formation of the plate 11). The area in which the receiver 39 is disposed is subjected to abrasion process in use according to the regulations. Thus, for easier repair of the worn device 30, an insert 31 ′ detachably connected to the upper region of the upper die 31 by a screw or the like shown is provided with a lower portion of the upper die 31. Is provided in the area. This insert 31 ′ has the receiving portion 39.

After the hinge component 10 is inserted, the end of the neck 20 is supported on the circumferential surface of the central insert 33. The central insert 33 has a flat end face 43. In order to fix the position of the hinge part in the dies 31 and 33, a fixing member 44 is used, which is arranged in the peripheral region of the central insert 33, in which case the fixing member 44 is radially inclined. It is formed by a spring-loaded pin toward the outside.

An unperforated carrier strip 20 is inserted between both die parts 31, 32. The compression ring 34 is stopped (fixed) at the predetermined initial position shown in FIG. 6 by the spring 56 described above. At the maximum stroke of the die, the major upper surface 45 of the compression ring 34 is above the cutting edge 42 provided in the cutting die 32, or preferably at the same height as the cutting edge 42. Thereby a horizontal support plane 60 for the carrier strip 20, which is indicated by dashed lines in FIG. 6, is formed in the compression ring 34.

In the downstroke 37 of the upper die groups 31, 33, 54, the corresponding compression ring 54 at the tip first strikes the carrier strip 20 overlying the compression ring 34. The two rings 54, 34 have inclined surfaces 58 and 59 extending parallel to each other, with the carrier strip 20 being caught between the inclined surfaces so that the carrier strip 20 first Stretches lightly. The stopper face 58 of the compression ring 34 extends at an acute angle 61 with respect to the support plane 60, which is indicated by dashed lines in FIG. 6, wherein the support plane 60 extends out of the carrier strip 20. It is defined by the end face 45 of the compression ring 34 used for the support. The corresponding compression surface 59 of the compression ring 54 described above extends parallel to the compression surface 58. Thus, when the two dies 31, 32 are opposed to movable 37, the carrier strip 20 around the edge 62 formed between the end face 45 and the inclined face 58 of the compression ring 34 is pulled out. Lose. The area 29 to be drilled of the carrier strip is thereby pulled flat. As a result, the carrier strip 20 is in a taut state in the aforementioned support plane 60.

The center insert 33 pressurized by the press ram then hits the cutting edge 42 stationary on the carrier strip rear face 24 while striking on the front face 23 of the carrier strip 20 facing upwards. The carrier strip front face 23 is pressed against it. Thereby a circular hole-die cut is cut from the carrier strip 20. At this time, the hole radius 46 defined by the cutting edge 42 is smaller than the neck radius 26 of the hinge neck 12 shown in FIG. 6.

As the upper die 31 continues to descend in the direction of the stroke arrow 37, the carrier strip 20 extends more tightly between the inclined surfaces 58, 59 of the two compression rings 34, 54. At this time, the neck of the hinge component 10 through the previously formed hole until the plate 11 of the hinge component 10 contacts the compression ring 34 under the intermediate insertion of the carrier strip 20. 12 is moved. In this lowering motion 37 the upper die 31 overcomes the spring force 36 by the lower die side compression ring 34 and the axial protrusions in the flange forming part 47 of the lower die 32. Flanging processing of 16 and the hole neck 12 is performed. The spring force 55 of the upper compression ring 54 is less than the thrust force 36 acting on the compression ring 34. Similar to the case of the upper die 31, the lower die 32 also includes an insert 32 ′ located in the axial region with a major flange formation 47. That is, such a flange formation part 47 also wears when used for a long time. In such a case only the insert 32 'needs to be replaced.

In the flanging process, in particular the riveting state shown in FIG. 3 appears. Indeed, the entire neck length 48 of the hinge component shown in FIG. 4 is rolled into the back 24 of the carrier strip 20 until it becomes the ring formation 50 seen in FIG. At this time, the neck protrusion 16 is integrated into the ring forming portion 50. The support surface 49 formed by the above-mentioned arches 13 of the plate 11 with the neck protrusions 16 inserted into the middle of the hole edge region 21 of the carrier strip described above and shown in FIG. 6. Is pressed against. Here, the pressure point 40 is enclosed in a ring shape, which can be seen in FIG. 3. In the ring formation 51, an end region 41 of the carrier strip 20 continues to extend, which is matched in a ring segment manner with the ring formation 50. Inclined surfaces 58 and 59 hold carrier strip 20 even when the end region 41 is curled during the riveting process.

If the hinge part attached to the carrier strip 20 is used in accordance with the provisions, a tensile load is generated by the force arrows 52 shown in Figs. This tensile load 52 is absorbed by the pressure point 40. At the pressure point 40, a clamping effect first appears between the neck protrusion 16 and the support surface 49. The imitation cutting 19 of the protrusions 16 described above also provides a firm coupling force. Although the tooth tip 17 penetrates into the strip material, cracks do not form in the strip 20 due to the bends 27 and 28 of the toothed portion 19. This prevents notch formation. In the front of the tooth tip and in the arcuate toothed groove 18, a stepped ridge occurs at a strip thickness, indicated by reference numeral 53 in Fig. 3, beyond the pressure point 40. That is, there is a tendency for the strip 40 to increase back to the original strip thickness 25 at point 53. When the strip 20 is subjected to a tensile load 52, the stepped ridge 53 of the strip material 20 clings to the wavy edge of the neck protrusion 16. This increases the positive bonding force of the rivet component 10 'riveted to the strip 20, and very high tensile strength is achieved.

Claims (16)

As a stop for reinforcing the edge area 21 around the hole 22 in the carrier strip 20, A plate 11 that lies on the front face 23 of the carrier strip 20, a tubular neck 12 penetrating the aperture 22 and an arc transition 14 between the plate 11 and the neck 12. Consisting of diskless aperture parts 10, 10 ', The free end 15 of the neck 12 has protrusions 16 extending axially and / or radially, In the hinge where the flange of the hinge part 10 'neck 12 is placed on the rear face 24 of the carrier strip 20 after the riveting process, In fact, the entire neck length 48 is spirally rolled into the ring interior 51 and the projection 16 of the end portion 15 of the neck 12 is wound into the spiral formation thus formed, thus completing the completed neck ( 12, the flange extends beyond the closed ring formation 50, A hole edge region 21 is inserted in the middle, so that the carrier strip 20 is a neck in the helical interior of the ring forming portion 50 with the backing surface 49 formed by the plate 11 or the transition portion 14. (12) Pressurizing the protrusions 16 and creating area pressure points 40 on the tightly squeezed (erfasst) carrier strip 20, which cascades the strip material in front of the pressure points 40. A ridge 53 is formed, The end region 41 of the carrier strip 20 continues to extend from the inside of the ring forming part 51 beyond the area pressure point 40 to the edge of the hole, matching the shape of the ring forming part 50 in a ring segment manner. (41), When a tensile load is applied to the carrier strip, the staircase ridge (53) of the strip material is firmly coupled to the protrusion (16), acting against the tensile load. The method of claim 1, The axial neck protrusion (16) is characterized in that it consists of a toothed end edge (19) of the neck (12). The method of claim 2, The tooth tip 17 is convexly curved, the tooth groove 18 is concavely curved, The clasp characterized in that the two curved portions (27, 28) define the wave shape of the tooth edge (19). The method of claim 3, wherein The sawtooth edge is characterized in that it has an asymmetrical wave shape. The method according to claim 3 or 4, The convex bend (27) of the tooth tip (17) is characterized in that it is formed smaller than the concave bend (28) of the tooth groove (18). The method according to any one of claims 1 to 4, A hinge, characterized in that the material of the carrier strip (20) is formed flexibly and / or elastically. The method of claim 6, The carrier strip is characterized in that the carrier strip (20) is formed of a canvas cover. The method of claim 6, The carrier strip (20) is characterized in that formed of a reinforced plastic thin film. Apparatus 30 for attaching the fastener component 10 to a carrier strip 20 according to claim 1, A lower die 32 having a flanged cutting edge 42 and a flanged forming portion 47 for the neck 12 of the aperture part 10, A central insert 33 which receives the hinge component 10 and moves axially relative to the spring force 35 and an upper die 31 which is in relative stroke with respect to the lower die 32, Carrier strip 20 is arranged between the two dies 31, 32, and the carrier strip 2 with the cutting edge 42 of the lower die 32 lying therebetween with the end face of the central insert 33. To make holes in them, In the lower die 32, compression rings 34 are disposed at radial intervals with respect to the flange forming portion 57 to receive a force load in the direction of the upper die 31 (36), In the device (30), the hole radius (46) of the cutting edge (42) is formed smaller than the outer radius (26) of the collar (10) neck (12). The end face 43 of the central insert 33 is formed flat without a pull-up pin (Vorziehzapfen) for deep drawing the carrier strip 20, The compression ring 34-at the maximum stroke of the two dies 31, 32-is located at the height of the cutting edge 42 of the lower die 32 and together with the cutting edge 42 the two dies ( Forming a support plane 60 for the carrier strip 20 to be disposed between 31, 32,  The compression ring 34 is assigned a corresponding compression ring 54 in the upper die 31, which is subjected to a force load 55 towards the lower die 32, Device, characterized in that the carrier strip (20) is sandwiched between the two rings (34, 54) when a stroke movement (37) takes place. The method of claim 9, The two rings 34, 54 have two inclined surfaces facing each other and corresponding inclined surfaces 58, 59, and the carrier strip 20 is sandwiched between the two rings during the working stroke of the dies 31, 32. Characterized in that the device. The method of claim 10, The inclined surface 58 extends at an acute angle 61 facing the stroke direction 37 with respect to the support plane 60 defined by the support surface 45 of the compression ring 34, The corresponding inclined surface (59) of the corresponding compression ring (54) extends parallel to the inclined surface (58) of the compression ring (34). The method according to any one of claims 9 to 11, The threaded compression spring has a ring-shaped end face, Such ring end face forms the compression ring (34), wherein the compression spring generates a force load (36). delete delete delete delete