EP0401433B1 - Procédé et appareil pour la prise d'un lien de cerclage - Google Patents

Procédé et appareil pour la prise d'un lien de cerclage Download PDF

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Publication number
EP0401433B1
EP0401433B1 EP19890305621 EP89305621A EP0401433B1 EP 0401433 B1 EP0401433 B1 EP 0401433B1 EP 19890305621 EP19890305621 EP 19890305621 EP 89305621 A EP89305621 A EP 89305621A EP 0401433 B1 EP0401433 B1 EP 0401433B1
Authority
EP
European Patent Office
Prior art keywords
strap
grip
binding
gripping
succeeding
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
EP19890305621
Other languages
German (de)
English (en)
Other versions
EP0401433A1 (fr
Inventor
Kanami Kato
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.)
Signode Japan KK
Original Assignee
Signode KK
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 Signode KK filed Critical Signode KK
Priority to DE1989610513 priority Critical patent/DE68910513T2/de
Priority to EP19890305621 priority patent/EP0401433B1/fr
Publication of EP0401433A1 publication Critical patent/EP0401433A1/fr
Application granted granted Critical
Publication of EP0401433B1 publication Critical patent/EP0401433B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools

Definitions

  • the present invention relates to improvements in a method and apparatus for securing and gripping a preceding portion of a strap such as steel band which is wound around an article to be bound and then tightened before its ends are bonded together.
  • the jaws may grip the strap at a single point or may include at least one serrated jaw to improve the grip between them and the strap. In both cases the surface of the strap tends to be scored by the jaws which can lead to weakening and failure of the strapping.
  • a method of gripping a strap whilst bonding its ends together including the steps of: winding a binding strap around articles to be bound, gripping to secure and hold a preceding portion of the strap, taking up the succeeding portion of the strap, and bonding overlapping strap portions of the preceding portion and the succeeding portion to each other whilst applying tension to them; is characterised in that the preceding portion of the strap is gripped by grip means including a jaw and a stationary cutter which include intermeshing projections which form the preceding portion of the strap into a serpentine shape with a number of concave and convex portions.
  • a strap binding machine includes a binding head including grip means to hold a preceding portion of the strap, tensioning means to apply tension to a succeeding portion of the strap after it has been wrapped around an article to be bound, bonding means to bond the preceding portion and succeeding portion of the strap together, and a cutter to sever the succeeding portion of the strap after it is bonded, and is characterised in that the grip means is formed by a jaw and stationary part of the cutter and in which these include intermeshing projections which form the preceding portion of the strap into a serpentine shape with a number of concave and convex portions.
  • a binding apparatus has a multi-functional binding head 1, to be discussed later, which is vertically movable with respect to its frame.
  • Articles 2 to be bound are fed to a predetermined position under the binding head 1 in the frame.
  • a binding strap 3 such as a steel band is fed from a dispenser by the forward rotation of reversible rollers 4 of the binding head 1.
  • the strap 3 is guided around articles to be bound 2 through a chute and gate (not shown). After making a round of the articles to be bound, the preceding portion 3a of the strap 3 is returned to the binding head 1.
  • the drive rollers 4 are reversely rotated, thereby to take up the succeeding portion 3b.
  • This causes the winding strap 3 to come off the chute and the gate such that the articles 2 to be bound are wound tightly with the strap 3.
  • the binding head 1 is lowered onto the articles to be bound, as shown by an arrow d .
  • a C-sectioned seal fitment 7 is placed on the overlapping strap portions of the preceding portion 3a and the succeeding portion 3b, and the seal fitment is turned and crimped at its lateral edges.
  • the lateral edges are partially notched by the jaw 6 and notchers 9 which are lowered.
  • This forms notches 10 which are turned in opposite directions to clamp them together to bond the overlapping strap portions together.
  • the bonded strap portion is cut and separated from the rearwardly connecting strap portion 3c, by and between the stationary cutter 5 and a movable cutter 11 which is lowered.
  • the bonded strap is resiliently returned by the amount of looseness generated by the removal of the jaw 6.
  • a sufficiently high tension still remains in the binding strap to assure a good binding effect.
  • the most common conventional strap binding method has been described.
  • a number of different bonding means may be used.
  • the overlapping strap portions may be bonded to each other by spot welding.
  • the grip means may also have a variety of forms.
  • a multi-grip means is also known as shown in Figure 6b. In this the strap is gripped by and between a sawtooth holding surface 5S formed on the stationary cutter 5 and the flat surface of the jaw 6.
  • the following series of steps are carried out: winding the strap 3; gripping the preceding portion 3a; taking up and winding the succeeding portion 3b; tightening and tensioning the strap; bonding the preceding portion 3a and the succeeding portion 3b to each other under tension; cutting and separating the bonded strap from the connecting portion 3c; and removing the underlay.
  • the strap preceding portion 3a should be gripped as tightly as possible and held in order to resist the high tension applied to the succeeding strap portion 3b by the drive rollers 4. Even after the strap succeeding portion 3c has been separated from the strap connecting portion 3c, a high tension still exists between the gripped portion and the seal fitment bonding portion.
  • a steel-band strap having strength capable of sufficiently resisting these tensions is typically used. For example, there may be used a steel-band strap having a width of 3/4 to 1 1/4 inch (19 to 32 mm), a thickness of 1 mm or less, and a resistance to tension of about 75 to 100 kgs/mm2.
  • Figure 7(a) shows a grip mark 12s produced in the case of the single grip device shown in Figure 6a
  • Figure 7(b) shows grip marks 12m produced in the case of the multiple grip device shown in Figure 6b. If the gripping force is smaller than the tightening tension applied to the strap, the strap may be cut or slip at the gripped portions, and the binding residual tension is considerably reduced.
  • the grip means includes a jaw and a staiffy cutter of the binding head formed with intermeshing projections so that the strap is formed into a serpentine shape with a plurality of concave and convex portions.
  • Figures 1 and 3 illustrate the present invention.
  • the preceding portion 3a of the winding strap 3 is gripped and held between and by the lower jaw 6A and an upper stationary cutter 5A, while the strap 3 is formed into a serpentine shape by being pushed up at first positions thereof in a direction shown by arrows U and pushed down at second positions in a direction shown by arrows V.
  • the first positions alternate with the second positions.
  • a seal fitment 7 is placed on the overlapping strap portions of the preceding portion 3a and the succeeding portion 3b.
  • Notches 10 are then formed to bond the overlapping strap portions to each other.
  • the strap portion thus bonded is cut and separated from the strap connecting portion at a cut end 3e with a movable cutter 11A.
  • grip marks are formed on the strap at its portion near the centre so that a plurality of convex marks 12U and concave marks 12V are respectively formed on the obverse and reverse surfaces of the strap in an adjacent manner.
  • the method of the present invention provides the following operations and effects.
  • the gripping method in accordance with the present invention includes the same steps as those in the conventional method, of: winding a binding strap around articles to be bound, by a binding head; and gripping, while securing and holding, the grip portions of the preceding portion of the strap returned to the binding head.
  • Figure 3 is a vertical section view in side elevation of an example of the grip means used in the gripping method of the present invention.
  • Figure 3 shows the relative positions of the stationary cutter 5A and the jaw 6A in a closed position.
  • the jaw 6A is provided on the intermeshing jaw surface thereof with a plurality of convex portion 6A' and concave portions 6A''.
  • the stationary cutter 5A is provided on the intermeshing jaw surface thereof with a concave portion 5a'' and convex portions 5A'.
  • the convex portions 6A' are opposite to the concave portion 5A'', while the concave portions 6A'' are opposite to the convex portions 5A'.
  • FIG 4 shows, in plan, the grip marks formed on the strap preceding portions 3a by the grip means according to the method of the present invention.
  • the grip marks include convex marks 12U and concave marks 12V which are formed, at a central area of the strap, alternately in the longitudinal direction thereof.
  • Figure 3 also shows a movable cutter 11A, and the cut end 3e at which the strap succeeding portion 3b is cut and separated from the connecting portion of the strap stock.
  • the preceding portion of the strap is securely gripped to resist the tension applied to the strap at the time when the strap is tightened and when the strap end portions are subsequently bonded to each other.
  • Convex and concave grip marks are formed in the vicinity of one another. This reduces the drop in strap tension remaining after the strap end portions have been bonded to each other. Accordingly, the binding strap is hardly scored assuring a good binding.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)

Claims (2)

  1. Procédé pour la prise d'un lien (3) tout en reliant ses extrémités l'une à l'autre, comprenant les étapes consistant à : enrouler un lien de cerclage autour d'articles (2) devant être cerclés ; saisir et maintenir à demeure un premier tronçon (3a) du lien ; prélever le tronçon successif (3b) du lien ; et relier l'une à l'autre des régions chevauchantes du premier tronçon et du tronçon successif du lien, tout en les soumettant à une tension ;
       caractérisé par le fait que le premier tronçon du lien est saisi par un moyen de préhension comprenant une mâchoire (6) et un sectionneur fixe (5), qui présentent des saillies (5A', 6A') mutuellement en prise et donnant, au premier tronçon du lien, la forme d'un serpentin muni d'un certain nombre de segments concaves et convexes.
  2. Machine de cerclage par lien, munie d'une tête de cerclage (1) comprenant un moyen de préhension (5, 6) pour maintenir un premier tronçon (3a) du lien (3) ; un moyen tendeur (4) pour exercer une tension sur un tronçon successif (3b) du lien (3) après qu'il a été enroulé autour d'un article (2) devant être cerclé ; un moyen de liaison (9) pour relier, l'un à l'autre, le premier tronçon (3a) et le tronçon successif (3b) du lien ; et un sectionneur (5, 11) pour séparer le tronçon successif (3b) du lien après sa liaison,
       caractérisée par le fait que le moyen de préhension est formé d'une mâchoire (6) et d'une partie fixe (5) du sectionneur, lesquelles présentent des saillies (5A', 6A') mutuellement en prise et donnant, au premier tronçon (3a) du lien, la forme d'un serpentin muni d'un certain nombre de segments concaves et convexes.
EP19890305621 1989-06-05 1989-06-05 Procédé et appareil pour la prise d'un lien de cerclage Expired - Lifetime EP0401433B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1989610513 DE68910513T2 (de) 1989-06-05 1989-06-05 Verfahren und Apparat zum Ergreifen eines Umreifungsbands.
EP19890305621 EP0401433B1 (fr) 1989-06-05 1989-06-05 Procédé et appareil pour la prise d'un lien de cerclage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19890305621 EP0401433B1 (fr) 1989-06-05 1989-06-05 Procédé et appareil pour la prise d'un lien de cerclage

Publications (2)

Publication Number Publication Date
EP0401433A1 EP0401433A1 (fr) 1990-12-12
EP0401433B1 true EP0401433B1 (fr) 1993-11-03

Family

ID=8202706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890305621 Expired - Lifetime EP0401433B1 (fr) 1989-06-05 1989-06-05 Procédé et appareil pour la prise d'un lien de cerclage

Country Status (2)

Country Link
EP (1) EP0401433B1 (fr)
DE (1) DE68910513T2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5848621A (en) * 1996-03-22 1998-12-15 Illinois Tool Works Inc. Cutter for steel strapping tool

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH655069A5 (en) * 1982-03-12 1986-03-27 Fromm Ag Apparatus for attaching a band, especially a steel band, around an article

Also Published As

Publication number Publication date
DE68910513D1 (de) 1993-12-09
EP0401433A1 (fr) 1990-12-12
DE68910513T2 (de) 1994-03-31

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