EP0351489B1 - Tête d'agrafage pour machine d'agrafage à fil - Google Patents

Tête d'agrafage pour machine d'agrafage à fil Download PDF

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Publication number
EP0351489B1
EP0351489B1 EP89104053A EP89104053A EP0351489B1 EP 0351489 B1 EP0351489 B1 EP 0351489B1 EP 89104053 A EP89104053 A EP 89104053A EP 89104053 A EP89104053 A EP 89104053A EP 0351489 B1 EP0351489 B1 EP 0351489B1
Authority
EP
European Patent Office
Prior art keywords
stapling
head
bed
staple
guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89104053A
Other languages
German (de)
English (en)
Other versions
EP0351489A3 (en
EP0351489A2 (fr
Inventor
Hans-Jürgen Bahmüller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilhelm Bahmueller Maschinenbau Praezisionswerkzeuge GmbH
Original Assignee
Wilhelm Bahmueller Maschinenbau Praezisionswerkzeuge GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wilhelm Bahmueller Maschinenbau Praezisionswerkzeuge GmbH filed Critical Wilhelm Bahmueller Maschinenbau Praezisionswerkzeuge GmbH
Priority to AT89104053T priority Critical patent/ATE89779T1/de
Publication of EP0351489A2 publication Critical patent/EP0351489A2/fr
Publication of EP0351489A3 publication Critical patent/EP0351489A3/de
Application granted granted Critical
Publication of EP0351489B1 publication Critical patent/EP0351489B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F7/00—Nailing or stapling; Nailed or stapled work
    • B27F7/17—Stapling machines
    • B27F7/19—Stapling machines with provision for bending the ends of the staples on to the work
    • B27F7/21—Stapling machines with provision for bending the ends of the staples on to the work with means for forming the staples in the machine

Definitions

  • the invention relates to a stitching head for a wire stitching machine, with the features of the preamble of claim 1.
  • Such a stitching head is known from DE-OS 36 40 529.
  • the stapling head In order to be able to wrap staples with changed staple dimensions, i.e. leg length and back width as well as the wire thickness in cardboard with this arrangement, the stapling head must be dismantled to a large extent to replace the separating device, the bending device, as well as the staple guide and the staple driver. This is quite time consuming. The resulting long machine downtimes make the production of small batches uneconomical.
  • the object of the present invention is therefore to create a stitching head for a wire stitching machine which can be easily and quickly adapted to different clip dimensions.
  • the assemblies which are difficult to assemble are held or received on the bed which is connected to the head frame, so that the entire tool set essentially consisting of the bed, the clip guide and the clip driver as a complete quick-change unit in can be removed or installed in the shortest possible time.
  • the arrangement according to the invention enables different preassembled quick-change units to be kept ready, which can be exchanged very quickly when changing from one item of booklet quality to another, even by unskilled assistants.
  • the arrangement is such that the holding means have form-fitting stop means and clamping means.
  • the form-fitting stop means are formed by a groove and at least one corresponding piece. This is a very easy to manufacture arrangement that ensures high accuracy during assembly.
  • the stapling head follows the staple a short distance in its conveying direction for a jerk-free movement in order to drive in the clamp, a stable mounting of the head frame is also necessary in the conveying direction of the staple.
  • This stable mounting is advantageously achieved in that the groove has undercut flanks which at least partially encompass the shaped piece.
  • the holding means are a dovetail groove and the shaped piece is a corresponding dovetail guided and held in it.
  • a dovetail guide allows high repeatability during assembly and allows the quick-change unit to have a low overall height.
  • a dovetail guide is self-adjusting and largely insensitive to canting.
  • the arrangement according to the invention is such that the dovetail groove has a first and a second wedge bar, one of which is detachably and movably arranged. This ensures that the quick-change unit can be removed from its dovetail groove by simply disengaging the detachable and movable wedge strip without coming into collision with the other machine parts above or below the stitching head.
  • the dovetail groove and the shaped piece are aligned essentially parallel to the clamp guide.
  • the arrangement is such that the transverse dimension of the dovetail is essentially constant over its longitudinal extent.
  • the molded piece is integrally formed on the bed.
  • the dovetail is advantageously divided into several sections in the longitudinal direction. This measure reduces the mass of the parts to be moved without impairing the stability of the arrangement.
  • the wedge bar which is movably and displaceably held on the head frame, is formed by a clamping claw which can be clamped to the bed with a cylinder screw against the dovetail. This ensures easy handling since the bed is slidable into the desired position along the dovetail groove and can be securely fixed there.
  • the arrangement is advantageously made such that an indexing device between the head frame and the bed for determining the position of the bed on the head frame transversely to the longitudinal direction of the Holding means is arranged.
  • this indexing device is formed by a feather key arranged transversely to the longitudinal direction of the dovetail groove.
  • the bed is designed to hold a wire feed, the cutting device and the bending device. This means that all the assemblies influencing the bracket geometry are combined in one quick-change unit and can therefore be exchanged together.
  • the arrangement is such that the cutting device is integrally formed on the side of the clamp guide.
  • the staple guide with the staple driver is held captive in the bed. This ensures that these difficult to assemble components of the stitching head are not during operation or detach from each other by incorrectly or unintentionally putting down the quick-change unit.
  • FIG. 1 A part of a stitching head 10 is illustrated in a highly schematic manner in FIG. 1. Only those parts are shown which are necessary to explain the invention. The other components, which per se belong to a stitching head, are taken on their own, known and omitted for the sake of clarity.
  • the stitching head 10 has a head frame 11 with a substantially elongated shape as die-cast aluminum, at the upper end of which a plain bearing bush 12 for pivotably mounting the stitching head 10 extends across the head frame.
  • the head frame 11 has on its one long side in the lower third a second slide bearing bush 14, which is oriented parallel to the slide bearing bush 12 and by means of a flange 15 to the front protrudes from the head frame.
  • the pivoting movement is brought about by a drive device, which is not described in further detail, and takes place about a horizontal axis.
  • the head frame 11 has a flat ground rectangular receiving surface 18, to which a wedge strip 20 extends laterally on the same side of the head frame 11 on which the slide bearing bush 14 is arranged, over the entire length of the receiving surface 18.
  • the wedge strip 20 has a bevel 21 on its narrow longitudinal side facing the receiving surface 18, so that an acute angle is formed together with the receiving surface 18 (see FIG. 4).
  • a key 24 oriented transversely to the longitudinal extent of the wedge strip 20 is let into the receiving surface 18 and serves as an indexing device for determining the position of the bed 17 on the head frame 11 in the longitudinal direction.
  • a clamping claw 25 is arranged on the head frame 11 by means of a prismatic spacer 26 and an Allen screw 27 on the longitudinal side 22 of the head frame 11 opposite the wedge strip 20 and jumping backwards relative to the receiving surface 18.
  • the clamping claw 25 has a substantially T-shaped shape, with its crossbeam 28 being ground flat in the region of the side surface 19 facing the receiving surface 18.
  • the longitudinal side of the head frame 11 is also chamfered with respect to the receiving surface, so that the side surface 19 of the clamping claw 25 includes an angle with the receiving surface 18 which corresponds to the angle of the chamfer 21 with the receiving surface 18.
  • the arrangement is otherwise such that by means of the spacer 26 or the correspondingly angled head frame 11 in this area the clamping claw 25 with its side facing the receiving surface 18 encloses an angle which corresponds to the aforementioned angle of the chamfer 21 on the wedge bar.
  • the chamfer 21, the receiving surface 18 and the side surface 19 of the clamping claw 25 form a dovetail groove 29, which is oriented vertically, that is to say transversely to the axis of the slide bearing bush 12.
  • the clamping claw 25 has an elongated hole 31 in the region of its central beam 26, with which it is screwed onto the head frame 11 by the screw 27. Through the elongated hole 31, it is possible only by slightly loosening the Screw 27 to shift the clamping claw 25 obliquely to the rear, so that the dovetail groove 29 is open on one long side.
  • the bed 17 consists of two parallel spaced guide jaws 33 and 34, the facing surfaces 35 and 36 of which are ground.
  • the two jaws 33 and 34 are connected to one another by means of three cross legs 38 to form a U-profile.
  • the three cross legs 38 are all of equal length, chamfered at their ends and project laterally beyond the two jaws 33 and 34, so that a dovetail 40 corresponding to the dovetail groove 29 results.
  • the middle of the three cross legs 38 has on its side facing the receiving surface 18 a recess 42 into which the feather key 24 can be inserted with little play.
  • One jaw 34 is widened laterally in its lower region and is set up to receive the wire feed 43.
  • the wire feeder 43 is otherwise known and is therefore not described in further detail. In order to understand the function of the stitching head 10, it is only necessary to explain that the wire feed 43 laterally brings the wire into the interior of the U-profile formed by the two jaws 33 and 34 and the transverse legs 38, where the wire is described by one described below Cutting device 45 is assembled into correspondingly long pieces of wire.
  • a clip guide 48 has an elongated shape and has an approximately U-shaped profile in cross section, the outer dimensions of which correspond to the inside dimensions of the bed 17, so that the clip guide 48 is guided in the bed 17 so as to be longitudinally displaceable with little play.
  • an insert 50 is provided, by means of which the clear width of the U-profile narrows; the width corresponds to the back width of the clip.
  • this insert 50 which acts together with the wire holder claw 65 as a bending device, the hardened lower end of a staple driver 53 is guided in a longitudinally displaceable manner.
  • an articulated head 55 is flanged to the side, in which a needle bearing bush 56 is fitted, the axis of rotation of which extends transversely to the longitudinal direction of the clamp guide 48.
  • the articulated head 55 serves, as described further below, to connect the clamp driver 48 to the drive device.
  • the clamp driver 53 which is guided in a longitudinally displaceable manner in the clamp guide 48, has a rectangular cross section and an elongated shape.
  • the lower hardened end of the clamp driver 53 is dimensioned depending on the width of the cross leg of the clamp and is held interchangeably in the factory at the upper part of the clamp driver 53.
  • a joint head 58 is also flanged, in which a needle bearing bush 59 is fitted.
  • the joint head 58 is, similar to the joint head 55, set offset laterally upwards from the clamp driver 53, the arrangement being such that the two rod ends 55 and 58 are mounted opposite one another on one of the two long sides and do not interfere with the up and down movement of the clamp guide 48 or the clamp driver 53.
  • a cover plate 63 is screwed to the two jaws 34 and 35 by means of several screws 61, so that the clamp guide 48 in the bed 17 and the clamp driver 53 in the clamp guide 48 are arranged vertically movable and the whole arrangement can be removed as a quick-change unit from the head frame 11 or flanged to it.
  • a wire holder claw 65 is articulated, which is pivoted parallel to the longitudinal extension of the clamp driver 53 about an axis 66 in the central region of the cover plate 63 and through a recess 67 open on the lower edge of the cover plate 63, projecting towards it lower end of the clamp driver 53 is pivotable.
  • the free end of the wire holder claw 65 is provided with a head 68 which has on its inside a transverse groove 71 which runs transversely to the longitudinal direction of the clamp driver 53 and into which the wire feed 43 feeds the wire required for the formation of the clamp.
  • an S-shaped spring 67 which is screwed to the cover plate 63 at its upper end and which bears on the head 68 of the wire holder claw 65 with its lower end, the latter is pressed in the direction of the clamp driver 53 (see also FIG. 2).
  • FIG. 3 illustrates a quick-change unit in which a wire 70 is brought laterally through the wire feed 43 in the area of the clip guide 48 or the clip driver 53.
  • the cover plate 63 is omitted so that the cutting device 45 is visible laterally on the clamp guide 48.
  • This is a sharp-edged nose 72 formed on the side of the clamp guide 48, which is guided along the edge of the wire feed 43 during the downward movement of the clamp guide 48 and thus cuts off a piece corresponding to the clamp dimensions from the wire. Since the wire piece is held by the claw 68 during this process, the wire piece is simultaneously bent into the clamp. Finally, it lies curved in the channel of the clamp guide 48.
  • two connecting plates 76 are arranged on each of the two joint heads 55 and 58, which establish the connection to a drive device (not shown).
  • the releasable connection between the two rod ends 55 and 58 and the drive device is described below.
  • Fig. 4 illustrates in detail the cross-sectional shape of the stitching head 10 shown in Fig. 1 only in an overview.
  • the bed 17, in Fig. 1 composed of several parts in Fig. 4 is designed as a one-piece aluminum die-cast part.
  • the clamp guide 48 also has a double T-shaped cross-sectional profile, the clamp driver 53 being received in a recess 49 pointing away from the bed 17.
  • the head frame 11 has an angled flange 77 for receiving the screw 27, to which the spacer 26 also connects in a rectangular recess 78.
  • the spacer 26 On its side facing the clamping claw 25, the spacer 26 has a projecting transverse edge 80, so that when the screw 27 is screwed on, the clamping claw 25 rests only on this transverse edge 80 on the spacer 26 and thus without tilting with the dovetail 40 and the bed 17 can come into engagement.
  • FIG. 5 and 6 illustrate how, by means of the two connecting plates 76, the clamp guide 48 is connected to a swivel arm 80 of the drive device, which is not further illustrated.
  • the swivel arm 80 Analogously to the joint head 55 of the clamp guide 48, the swivel arm 80 likewise has a needle bearing bush 82 through which a cylindrical bolt 83 projects axially.
  • a snap ring 84 is seated in a recessed groove 8 at its front end.
  • the connecting plates 76 have an elongated shape and have at both ends two bores 86 and 87 of the same diameter, which are dimensioned such that the cylinder bolt 83 is straight through the hole 87 the connecting plates 76 fits through.
  • the two connecting plates 76 are held captively on the swivel arm 80 on both sides by the head 85 or the snap ring 84.
  • the needle bearing bush 56 of the joint head 55 receives a bearing pin 88, at one end of which a thread 89 is formed, which protrudes through one of the connecting plates 76.
  • the thread 89 has a smaller diameter than the pin 88, so that a shoulder 91 is formed in the transition from the bearing pin 81 to the thread 89, on which the connecting plate is screwed by means of a nut 92, lies firmly.
  • the pin 88 is provided with a stepped bore 93, which has an internal thread 94.
  • a cylinder screw 96 can be screwed into this internal thread 94 through the hole 86 of the connecting plate 76.
  • the screw 27 of the clamping claw 25 is loosened and the quick-change unit is pivoted slightly around the joint heads 55 and 58, respectively.
  • the two screws 96 are unscrewed from the bearing pin 88 and the connecting plate 76 thus loosened is pivoted up. It is now possible to remove the quick-change unit laterally, the bearing pin 88 sliding out of the needle bearing bushes 56 and 58, respectively. The assembly is done in reverse order.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
  • Sewing Machines And Sewing (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Supports For Plants (AREA)

Claims (18)

  1. Tête d'agrafage pour une agrafeuse, destinée en particulier à l'agrafage d'éléments de carton au moyen d'agrafes en fil de fer, comportant:
    - un châssis (11) de tête d'agrafage,
    - un guide-agrafe (48) qui se déplace longitudinalement dans un berceau (17) sur le châssis (11) de tête d'agrafage aux fins de former et de tenir une agrafe avant son introduction dans le produit à agrafer,
    - un chasse-agrafe (53) qui se déplace longitudinalement dans le guide-agrafe (48), parallèlement à la direction de déplacement de celui-ci (48), aux fins de chasser l'agrafe hors dudit guide (48) et de l'enfoncer dans le produit à agrafer,
    - un dispositif de coupe (45) pour confectionner des morceaux de fil de longueur prédéterminée et un dispositif de pliage (50) pour former les agrafes et
    - deux bras d'entraînement qui entraînent de manière synchrone, mais avec un déplacement différent, le guide-agrafe et le chasse-agrafe,
       caractérisée
    - par le fait qu'un dispositif d'accouplement rapide (96) est disposé entre les bras d'entraînement et le guide-agrafe (48) et le chasse-agrafe (53),
    - par le fait que le berceau (17) est agencé sous la forme d'un élément autonome distinct du châssis (11) de tête d'agrafage, le berceau (17) et le châssis (11) comportant chacun des moyens de fixation (18, 21, 29, 40, 27) associés séparables qui assurent un positionnement précis du berceau (17) sur le châssis (11) de tête d'agrafage.
  2. Tête d'agrafage selon la revendication 1, caractérisée par le fait que les moyens de fixation (18, 21, 29, 40, 27) comportent des moyens de guidage (18, 21, 29, 40) qui agissent par conjugaison de forme et des moyens de serrage (27).
  3. Tête d'agrafage selon la revendication 2, caractérisée par le fait que les guidage (18, 21, 29, 40) agissant par conjugaison de forme sont constitués par une rainure (18, 21, 29) et au moins un élément profilé (40) correspondant.
  4. Tête d'agrafage selon la revendication 3, caractérisée par le fait que la rainure (18, 21, 29) présente des flancs (21, 29) en contre-dépouille qui enserrent au moins partiellement l'élément profilé (40).
  5. Tête d'agrafage selon la revendication 2, caractérisée par le fait que les moyens de fixation sont constitués par une rainure (18, 21, 29) en queue d'aronde et l'élément profilé est une queue d'aronde adaptée qui s'engage et est tenue dans ladite rainure.
  6. Tête d'agrafage selon la revendication 5, caractérisée par le fait que la rainure (18, 21, 29) en queue d'aronde comporte un premier (21) et un deuxième (29) bords inclinés, parmi lesquels l'un (29) est agencé de manière démontable et peut se déplacer.
  7. Tête d'agrafage selon la revendication 5, caractérisée par le fait que la rainure (18, 21, 29) en queue d'aronde et l'élément profilé (40) sont disposés sensiblement parallèlement au guide-agrafe (48).
  8. Tête d'agrafage selon la revendication 5, caractérisée par le fait que la dimension de la queue d'aronde (40) dans la direction transversale est sensiblement constante sur la longueur de ladite queue d'aronde.
  9. Tête d'agrafage selon la revendication 3, caractérisée par le fait que l'élément profilé (40) est formé d'une pièce avec le berceau (17).
  10. Tête d'agrafage selon la revendication 5, caractérisée par le fait que la queue d'aronde (40) est divisée en plusieurs éléments dans la direction longitudinale.
  11. Tête d'agrafage selon la revendication 6, caractérisée par le fait que le bord incliné (28) mobile, fixé avec possibilité de déplacement en translation sur la châssis (11) de tête d'agrafage est constitué par une bride de serrage (25) qui est serrée contre la queue d'aronde (40) sur le berceau (17).
  12. Tête d'agrafage selon la revendication 2, caractérisée par le fait qu'un dispositif de repérage (24) est disposé entre le châssis de tête d'agrafage (11) et le berceau (17) aux fins de déterminer la position du berceau (17) sur le châssis (11) de tête d'agrafage perpendiculairement à la direction longitudinale des moyens de fixation (18, 21, 29, 40, 27).
  13. Tête d'agrafage selon la revendication 12, caractérisée par le fait que le dispositif de repérage est constitué par une clavette (24) disposée perpendiculairement à la direction longitudinale de la rainure (40) en queue d'aronde.
  14. Tête d'agrafage selon la revendication 2, caractérisée par le fait que le berceau (17) est agencé pour recevoir un dispositif d'amenée de fil (43).
  15. Tête d'agrafage selon la revendication 2, caractérisée par le fait que le berceau (17) est agencé pour recevoir le dispositif de coupe (45).
  16. Tête d'agrafage selon la revendication 1, caractérisée par le fait que le dispositif de coupe (45) est formé d'une pièce sur le côté du guide-agrafe (48).
  17. Tête d'agrafage selon la revendication 2, caractérisée en ce que le berceau (17) est conçu pour recevoir le dispositif de pliage (50).
  18. Tête d'agrafage selon la revendication 2, caractérisée en ce que le guide-agrafe (48) est maintenu de façon imperméable dans le berceau (17) à l'aide du chasse-agrafe (53).
EP89104053A 1988-07-20 1989-03-08 Tête d'agrafage pour machine d'agrafage à fil Expired - Lifetime EP0351489B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89104053T ATE89779T1 (de) 1988-07-20 1989-03-08 Heftkopf fuer eine drahtheftmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3824501 1988-07-20
DE3824501A DE3824501C1 (fr) 1988-07-20 1988-07-20

Publications (3)

Publication Number Publication Date
EP0351489A2 EP0351489A2 (fr) 1990-01-24
EP0351489A3 EP0351489A3 (en) 1990-12-12
EP0351489B1 true EP0351489B1 (fr) 1993-05-26

Family

ID=6359051

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89104053A Expired - Lifetime EP0351489B1 (fr) 1988-07-20 1989-03-08 Tête d'agrafage pour machine d'agrafage à fil

Country Status (4)

Country Link
EP (1) EP0351489B1 (fr)
AT (1) ATE89779T1 (fr)
DE (2) DE3824501C1 (fr)
ES (1) ES2040396T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2681000B1 (fr) * 1991-09-05 1994-03-11 Sodeme Developpement Mat Emballa Tete d'agrafage sans frottement.
DE102005042517A1 (de) * 2005-09-07 2007-03-08 Heidelberger Druckmaschinen Ag Heftvorrichtung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE308380C (fr) *
GB119418A (en) * 1918-05-06 1918-10-03 Charles Poilvache Improvements in or in connection with Wire Stitching or Stapling Machines.
US1748261A (en) * 1924-05-20 1930-02-25 Joseph L Walker Stitcher head
US2079673A (en) * 1935-05-31 1937-05-11 Boston Wire Stitcher Co Stapling or wire-stitching machine
US2862205A (en) * 1956-03-05 1958-12-02 Saranac Machine Company Staple forming and driving head
DE3640529A1 (de) * 1986-11-27 1988-06-01 Bahmueller Masch W Heftkopf

Also Published As

Publication number Publication date
DE58904467D1 (de) 1993-07-01
DE3824501C1 (fr) 1989-10-12
EP0351489A3 (en) 1990-12-12
ES2040396T3 (es) 1993-10-16
ATE89779T1 (de) 1993-06-15
EP0351489A2 (fr) 1990-01-24

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