EP0928237A1 - Bolzenschneider - Google Patents
BolzenschneiderInfo
- Publication number
- EP0928237A1 EP0928237A1 EP96946357A EP96946357A EP0928237A1 EP 0928237 A1 EP0928237 A1 EP 0928237A1 EP 96946357 A EP96946357 A EP 96946357A EP 96946357 A EP96946357 A EP 96946357A EP 0928237 A1 EP0928237 A1 EP 0928237A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- joint
- bolt
- parts
- jaw
- articulated
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
- B26B17/02—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact with jaws operated indirectly by the handles, e.g. through cams or toggle levers
Definitions
- Bolt cutters are used to cut metal rods, in particular steel rods, or to cut off end sections that protrude beyond the nominal size. This is particularly necessary in reinforced concrete construction in order to bring the individual bars of a steel reinforcement to the correct length after they have been assembled with a certain excess to form the finished reinforcement and interwoven. The same applies to the use of structural steel mats, which are usually also supplied with a certain oversize and are cut to the desired final dimensions at the place of use. Sometimes cutouts also have to be made for the strip steel mats.
- the usual bolt cutters have a cutting head with two cutting jaws which are arranged next to one another in the cutting plane and which are pivotally connected to one another by means of an articulated connection.
- This articulated connection generally has two connecting tabs of the same type, which are arranged parallel to one another on both sides of the cutting jaws and each have a through hole at both ends.
- a hinge pin is inserted through the through holes in the connecting straps, which are aligned with one another in pairs, and through a corresponding through hole in the cutting jaws arranged between the connecting straps, and secured against falling out by suitable securing means.
- each cutting jaw has an actuating arm which is formed in one piece with the cutting jaw, so that each cutting jaw and its actuating arm form a two-armed lever.
- one end of an actuating lever is provided by means of a second joint connection in the form of a hinge joint articulated.
- the two actuating levers are designed as two-armed levers and are pivotally connected to one another by means of a third articulated connection.
- This joint connection is also formed by a hinge joint.
- the hinge eye of this hinge is arranged on both actuation levers outside their longitudinal axis on the side of the actuation lever in question facing the other actuation lever, so that the two actuation levers run next to one another at a certain mutual distance, at least in the region of the hinge joint.
- the first lever arm resulting from the distance between the third articulated connection and the second articulated connection is several times smaller than the length of its second lever arm extending from the third articulated connection or vice versa. If the two actuating levers are gripped in the region of their free end and pivoted relative to one another, this lever ratio results on the one hand in a correspondingly large step-down ratio and in an equally large force transmission. This power transmission is further reinforced by the fact that the actuating arms of the cutting jaws are generally about two to three times as long as the cutting jaws themselves.
- the cutting jaws In the open position, the cutting jaws should be able to be spread so far apart that they can grip a rod with a thickness which can still be cut by the bolt cutter in accordance with its cutting force. For a given overall transmission ratio, this results in a relatively large actuation path and thus a relatively large spread angle, especially in
- the invention has for its object to provide a bolt ⁇ cutters, the m of a reinforcing braid for a given depth of penetration tighter mesh or, conversely printed, can be inserted deeper into a reinforcing braid for a predetermined mesh size, to cut there character with one of its Schn ⁇ idkraft corresponding thickness to be able to.
- a bolt cutter with the features specified in claim 1. Characterized in that de two actuating levers in the Grundrißpro ⁇ etation twice in a row intersect, once at the third hinge joint and once zvischen to one of the third joint ⁇ connection and the free end point situated, m is the closed position of the bolt cutter at each actuation ⁇ a lever Long section available, which, viewed from the side of its end section with the handle, is located on the other side of the line of symmetry of the bolt cutter and has a limited distance from it and which initially pivots towards the line of symmetry during an opening movement and later also partially swings over the line of symmetry and in the open position of the cutting jaws and the actuating lever is also located at a limited distance on the same side of the line of symmetry as the handle.
- the outline of the actuating lever is expediently chosen so that the spread of the part of the actuating lever located in the vicinity of the third articulated connection is smaller in the open position of the cutting jaws than in the closed position.
- the spreading dimension of the part of the actuating levers near the cutting head is limited on both sides to a value that is significantly smaller than that of the conventional ones Is bolt cutters.
- the bolt cutter can be tied into smaller meshes of a reinforcement mesh are introduced and are then confirmed and the cutting ⁇ head can be inserted deeper into a reinforcing mesh having a predetermined mesh size so that even deeper rebars can be cut.
- the third articulated connection receives a design in which its parts are arranged symmetrically with respect to the cutting plane of the cutting jaws, so that the third articulated connection remains practically free of torsional forces when the bolt cutter is actuated.
- the same is achieved with the two second articulated connections.
- Fig. 1 eire front view of the bolt cutter in the
- FIG. 2 is a side view of the bolt cutter according to Fig. 1;
- Fig. 3 is a front view of the bolt cutter in the
- 5 a shows a front view of the parts detached from one another and 5 b of the articulated connection according to FIG. 4;
- 6a shows an end view of the parts of the articulated connection and 6b according to FIG. 4;
- 7a is a side view of the parts of the articulation and 7b of FIG. 4th
- the bolt cutter 10 has a cutting head 11 and two actuating levers 12 and 13 for actuating the cutting head 11.
- the cutting head 11 is of conventional design and has two cutting jaws 14 and 15 which are arranged next to one another in the cutting plane. They are pivotally connected to one another by means of a first articulated connection 16.
- the cutting jaws 14 and 15 continue beyond the articulation 16 in an actuating arm 17 and 18, respectively.
- the first articulated connection 16 has two connecting straps 21 and 22, which are each provided with two through holes as articulated eyes.
- a hinge pin is inserted through each pair of joint eyes that are aligned with one another and extends through a through hole on each of the two cutting jaws 14 and 15, which is in alignment therewith and serves as a joint eye.
- Usual securing means hold the hinge pin in the hinge eyes.
- the actuating lever 12 is articulated to the actuating arm 17 of the cutting jaw 14 via the second articulated connection 19.1.
- the actuating lever 13 is articulated to the actuating arm 18 of the cutting jaw 15 via the second articulated connection 19.2.
- the two actuating levers 12 and 13 are designed as two-armed levers which are pivotally connected to one another by means of a third articulated connection 23.
- the first lever arm 24 or 25, which extends between the third articulated connection 23 and the second articulated connection 19 in each case, 25 of the actuating levers 12 and 13 is designed to be relatively short.
- the second lever arm 26 or 27 of the actuating arms 12 and 13, which extends beyond the third articulated connection 23 to the free end, is a
- Second lever arm 26 and 27 of the two actuating levers 12 and 13 have a plurality of longitudinal sections with different layouts. These are explained below on the basis of the second lever arm 26 of the actuating lever 12, the details in part relating to the axis of symmetry 30 of the plan projection of the bolt cutter 10 ⁇ Fig. 1 and 3>.
- Each actuating lever has in the area of the third articulated connection 23 an articulated eye 28 or 29, which will be explained in more detail later with reference to FIGS. 4 to 7.
- the first length 31 is bent as a whole or at least has a bend in the floor plan, so that the floor projection of the adjoining second length 32 with the axis of symmetry 30 is one has a smaller crossing angle than the projection of the actuating lever 12 in the area of the articulated eye 28, which also continues in the projection of the first lever arm 24.
- This second length section 32 is straight.
- This is followed by a third length section 33, which then merges into a fourth length section 34.
- the plan projection of the third length section 33 has two opposite bends 35 and 36, of which the first bend 35 is directed towards the axis of symmetry 30 and thus also towards the side of the other actuating lever 13.
- the two bends 35 and 36 are expediently chosen such that in the closed position of the cutting jaws 14 and 15 shown in FIG fourth length section 34, at least end section 37 is aligned parallel to line of symmetry 30. Furthermore, it is expedient that at least the end sections of the two actuating levers 12 and 13 have such a large mutual distance in the closed position that the hands of the operator of the bolt cutter 10, which embrace the end sections, do not touch one another and in so far as there is no risk of injury.
- the third joint 23 is designed as a fork joint.
- One actuating lever, the actuating lever 13, has a certain predetermined thickness in the region of its articulated eye 29 and there has two parallel, flat outer surfaces 38 and 39 ⁇ Fig. 6a>.
- the other actuating lever, the 5 actuating lever 12, is fork-shaped in the region of its articulated eye 28 (FIG. 6b).
- the two fork parts 41 and 42 each have a flat inner surface 43 or 44 on the side facing one another, which are aligned parallel to one another and which are at a mutual distance 0 which is matched to the thickness of the confirmation lever 13 in the region of its articulated eye 29.
- the circular cylindrical through-hole 45 in the two fork parts 41 and 42 of the articulated eye 28 has at least approximately the same diameter as the through-hole 46 in the articulated eye 29.
- the articulated bolt of the third articulated connection 23, not shown in detail, is matched to this.
- the two second joint connections 19.1 and 19.2 are also designed as fork joints, the fork parts 0 of which are each arranged on the associated first lever arm of the actuating levers 12 and 13.
- the first lever arm 24 connects to the joint eye 28. Since this joint eye is fork-shaped 25, the lever arm 24 is also divided in the longitudinal direction and has the two lever parts 47 and 48. They have the same mutual distance wip the fork parts 41 and 42 ⁇ Fig. 6b>. Their mutually facing inner surface is the continuation of the inner surface 43 or 44
- Articulated connection 19.1 over. are designed as joint eyes or have one.
- the inner surfaces of the two fork parts 49 and 50 35, which are aligned parallel to one another, are at a mutual distance which depends on the thickness of the
- End portion of the actuating arm 17 of the cutting jaw 14 is coordinated. To simplify production, this distance is equal to the distance between the inner surface 43 and 44 of the fork parts 41 and 42 and the lever parts 47 and 48.
- the first lever arm 25 connects to the joint eye 29.
- the two fork parts 51 and 52 connect to the lever arm 25 as part of the second articulated connection 19.2. 6a and 7a>.
- Their parallel planar inner surfaces 53 and 54 have a mutual distance, which is based on the thickness of the
- End portion of the actuating arm 18 of the cutting jaw 15 is matched. Appropriately, it is equal to the distance between the inner surfaces 43 and 44 of the fork parts 41 and 42 and also the fork parts 41 and 50.
- Touch can be moved past each other by crossing their floor plan during the opening and closing movements.
- the advantages of the invention also result when the cutting head 11 used for cutting metal bars is replaced by another tool head, for example by a pair of pliers for holding workpieces or other objects or by scissors for cutting softer objects, such as that for example with pruning shears or cable shears and the like.
- the invention can in can also be used advantageously for medical, veterinary or dental instruments in the form of pliers, cutters or scissors, in which corresponding work is to be carried out in a narrow space with a certain minimum force on the tool head and at the same time the operating hand is to be relieved.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Scissors And Nippers (AREA)
- Harvester Elements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP1996/002151 WO1998004389A1 (de) | 1996-07-22 | 1996-07-22 | Bolzenschneider |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0928237A1 true EP0928237A1 (de) | 1999-07-14 |
EP0928237B1 EP0928237B1 (de) | 2002-04-17 |
Family
ID=8166222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96946357A Expired - Lifetime EP0928237B1 (de) | 1996-07-22 | 1996-07-22 | Bolzenschneider |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0928237B1 (de) |
AU (1) | AU2765197A (de) |
DE (2) | DE59609112D1 (de) |
WO (1) | WO1998004389A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU784327B2 (en) * | 1999-11-19 | 2006-03-09 | Abbvie B.V. | Human enzymes of the metalloprotease family |
DE102004022942B4 (de) | 2004-05-11 | 2019-06-13 | Knipex-Werk C. Gustav Putsch Kg | Zange |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2406670A (en) * | 1944-10-27 | 1946-08-27 | Jose F Delgado | Pruning shears |
DE9204637U1 (de) * | 1992-04-04 | 1992-07-16 | GÖHRIG, Gudrun | Bolzen- oder Mattenschneider |
-
1996
- 1996-07-22 EP EP96946357A patent/EP0928237B1/de not_active Expired - Lifetime
- 1996-07-22 WO PCT/EP1996/002151 patent/WO1998004389A1/de active IP Right Grant
- 1996-07-22 DE DE59609112T patent/DE59609112D1/de not_active Expired - Fee Related
- 1996-07-22 DE DE19681565T patent/DE19681565D2/de not_active Ceased
- 1996-07-22 AU AU27651/97A patent/AU2765197A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9804389A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1998004389A1 (de) | 1998-02-05 |
AU2765197A (en) | 1998-02-20 |
EP0928237B1 (de) | 2002-04-17 |
DE19681565D2 (de) | 1999-11-11 |
DE59609112D1 (de) | 2002-05-23 |
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