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EP1240965A1 - Lame de scie à bois - Google Patents

Lame de scie à bois Download PDF

Info

Publication number
EP1240965A1
EP1240965A1 EP02445031A EP02445031A EP1240965A1 EP 1240965 A1 EP1240965 A1 EP 1240965A1 EP 02445031 A EP02445031 A EP 02445031A EP 02445031 A EP02445031 A EP 02445031A EP 1240965 A1 EP1240965 A1 EP 1240965A1
Authority
EP
European Patent Office
Prior art keywords
teeth
tooth
subgroup
saw blade
blade according
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
Application number
EP02445031A
Other languages
German (de)
English (en)
Other versions
EP1240965B1 (fr
Inventor
Sven-Olov Lindgren
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.)
Kapman AB
Original Assignee
Kapman AB
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 Kapman AB filed Critical Kapman AB
Publication of EP1240965A1 publication Critical patent/EP1240965A1/fr
Application granted granted Critical
Publication of EP1240965B1 publication Critical patent/EP1240965B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/121—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet

Definitions

  • the present invention relates to a saw blade for cutting of wood.
  • a saw blade comprising teeth, all of which having sharp front and rear lateral edges, and said edges meeting at a sharp point or tip alternately on the right and the left side of the saw blade.
  • the teeth are arranged in recurrent groups of six teeth.
  • each tooth has front and rear edges chamfered and sharpened to cutting edges by grinding or filing, the edges being located on the same lateral side of each tooth and meeting to form a sharp point, said points being located alternately on the right and left sides of the saw blade, and said teeth being set alternately to that side where the sharp point is located.
  • Such saw blades are simple to maintain by resharpening with a file, and are efficient for cross-cutting at least of dry wood, and are operative in both directions of movement.
  • Saw blades with the described teeth have been shown to cut particularly fast and efficiently in moist wood.
  • they all have one disadvantage in common which is that they have proven to be difficult to produce and maintain, since they comprise teeth with different size, different height, different shape and/or different edge angles. In particular this makes them difficult to resharpen since they necessitate different filing angels.
  • the purpose of the present invention is to remedy the above mentioned disadvantages by proposing a saw blade for sawing of wood, especially moist wood, which combines a low cost of manufacture since all teeth have the same height and shape before setting, and with high efficiency and reduced vibrations in operation.
  • the saw blade is characterized by each recurrent group of six teeth being divided into two subgroups comprising three teeth each, and by the first tooth in the first subgroup being set to one side and the first tooth of the second subgroup being set to the opposite side.
  • one of the teeth in each subgroup is an unset tooth and the other two teeth in each subgroup are set respectively to that side where the sharp point is located.
  • the setting pattern of the first subgroup can advantageously be defined as being a mirror image of the setting pattern of the second subgroup.
  • the distances between the subgroups are longer than the distances between teeth within the subgroups. Also, the distances between the teeth in one of the subgroups are preferably shorter than the distances between the teeth in the other subgroup. This design with different distances between the teeth has the advantage of working against and neutralizing any vibrations that may have a tendency to occur.
  • the saw blade of the present invention is characterized by the second tooth in each subgroup being an unset tooth.
  • the first tooth and the third tooth in each subgroup are set teeth and both these set teeth are set to the same side.
  • the saw blade of the present invention is characterized by the third tooth in each subgroup being an unset tooth.
  • the second tooth in each subgroup is a set tooth, which is set to the opposite side compared to the first tooth in each subgroup.
  • one of the two teeth set to the left follows behind an unset tooth (which may be the last tooth of the preceding group of six teeth) and one follows behind a tooth set to the right (which may also be the last tooth of the preceding group of six teeth).
  • one of the two teeth set to the right follows behind an unset tooth and one follows behind a tooth set to the left. This ensures that within a group of six teeth, the lateral forces are symmetrical and their sum is as close to zero as possible, resulting in very straight-line cutting
  • the saw blade of the present invention is preferably characterized by having a constant width and being adapted for mounting in a bow saw.
  • the teeth of the saw blade are preferably arranged in recurrent groups of six teeth, where each group consists of two subgroups of three teeth each. All of the teeth are originally of equal height, i.e. before setting, they have the same size and shape and the same edge angles.
  • the pitch distance between the teeth varies, with a first greater distance 11, 41 between the last tooth 23,26; 33,36 in one subgroup and the first tooth 24,21; 34,31 in the following subgroup, and with a second smaller distance 12, 42 between adjacent teeth 21,22,23; 31,32,33 in one subgroup, and with a third intermediate distance 13, 43 between adjacent teeth 24,25,26; 34,35,36 in another subgroup.
  • each recurrent group of six teeth comprises two teeth set to the right, two teeth set to the left and two unset teeth.
  • Each subgroup contains one unset tooth.
  • Each set tooth is set to that side where the sharp point of the tooth is located.
  • the saw blade has a first subgroup consisting of the following teeth in order: one set to the left with point on the left 21, one unset with point on the right 22, one set left with point on the left 23, and a second subgroup with one set to the right with point on the right 24, one unset with point on the left 25, one set to the right with point on the right 26.
  • the setting pattern of the first subgroup is thus a mirror image of the setting pattern of the second subgroup.
  • the saw blade has a first subgroup consisting of the following teeth in order: one set to the left with point on the left 31, one set to the right with point on the right 32, one unset with point on the left 33 and a second subgroup with one set to the right with point on the right 34, one set to the left with point on the left 35, one unset with point on the right 36.
  • the setting pattern of the first subgroup is thus a mirror image of the setting pattern of the second subgroup.
  • first set tooth 21;31 of the first subgroup 21,22,23; 31,32,33 is set to one side and the first set tooth 24;34 of the second subgroup 24,25,26; 34,35,36 is set to the opposite side.
  • the set teeth are not set alternately to the left and to the right in a regular pattern. Instead they are actually set in pairs, two teeth to the left 21,23; 35,31 and two teeth to the right 24,26; 32,34, and with a straight unset tooth 22;36;25;33 between the two teeth of the pair.
  • a saw blade according to the invention can be provided with a handle to become a part of a handsaw. It is also especially suited to be mounted in a bow saw to be used for cutting of firewood, and is then made as a narrow band, with symmetrical teeth having sharp cutting edges with equal slope in both directions, which allows reversing the saw blade or cutting in both directions.
  • the saw is not only suitable for sawing moist wood but also dry wood.
  • the unset tooth is illustrated as an ordinary straight tooth in both embodiments, but it could also be designed as a raker tooth, for instance with two cutting edges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
  • Scissors And Nippers (AREA)
  • Sawing (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
EP02445031A 2001-03-15 2002-03-12 Lame de scie à bois Expired - Lifetime EP1240965B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0100895 2001-03-15
SE0100895A SE523982C2 (sv) 2001-03-15 2001-03-15 Sågblad för trä

Publications (2)

Publication Number Publication Date
EP1240965A1 true EP1240965A1 (fr) 2002-09-18
EP1240965B1 EP1240965B1 (fr) 2008-04-23

Family

ID=20283367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02445031A Expired - Lifetime EP1240965B1 (fr) 2001-03-15 2002-03-12 Lame de scie à bois

Country Status (10)

Country Link
EP (1) EP1240965B1 (fr)
CN (1) CN1267258C (fr)
AT (1) ATE392976T1 (fr)
DE (1) DE60226189D1 (fr)
DK (1) DK1240965T3 (fr)
ES (1) ES2305196T3 (fr)
MY (1) MY139323A (fr)
PT (1) PT1240965E (fr)
SE (1) SE523982C2 (fr)
SG (1) SG109962A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005087421A1 (fr) * 2004-03-11 2005-09-22 Kapman Ab Lame de scie a bois
JP2010510079A (ja) * 2006-11-24 2010-04-02 エリコン・トレーディング・アクチェンゲゼルシャフト，トリュープバッハ 帯鋸、および帯鋸を製造する方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2072624A (en) * 1932-12-01 1937-03-02 Owen Jonas Leander Saw blade
DE854570C (de) * 1950-11-21 1952-11-06 Adolf Schmidt Saege mit Dreiecks-, Schneid- und Raeumerzahnung
GB2100187A (en) * 1981-06-15 1982-12-22 Miyawaki Uichi Wood working saws
US4802396A (en) * 1982-06-07 1989-02-07 Kuklinski Anthony K Saber saw blade
SE467489B (sv) * 1990-09-06 1992-07-27 Sandvik Ab Saagblad
JP2000102902A (ja) * 1998-09-30 2000-04-11 Kabasawa Seisakusho:Kk 鋸

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5253696A (en) * 1995-03-23 1996-10-08 American Saw And Manufacturing Company Synchronized variable tooth arrangements for saws
US5603252A (en) * 1995-08-28 1997-02-18 Sandvik Ab Saw blade
SE509398C2 (sv) * 1997-06-26 1999-01-25 Sandvik Ab Bandsågblad

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2072624A (en) * 1932-12-01 1937-03-02 Owen Jonas Leander Saw blade
DE854570C (de) * 1950-11-21 1952-11-06 Adolf Schmidt Saege mit Dreiecks-, Schneid- und Raeumerzahnung
GB2100187A (en) * 1981-06-15 1982-12-22 Miyawaki Uichi Wood working saws
US4802396A (en) * 1982-06-07 1989-02-07 Kuklinski Anthony K Saber saw blade
SE467489B (sv) * 1990-09-06 1992-07-27 Sandvik Ab Saagblad
JP2000102902A (ja) * 1998-09-30 2000-04-11 Kabasawa Seisakusho:Kk 鋸

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 07 29 September 2000 (2000-09-29) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005087421A1 (fr) * 2004-03-11 2005-09-22 Kapman Ab Lame de scie a bois
CN100417482C (zh) * 2004-03-11 2008-09-10 开普曼股份有限公司 用于木料的锯片
JP2010510079A (ja) * 2006-11-24 2010-04-02 エリコン・トレーディング・アクチェンゲゼルシャフト，トリュープバッハ 帯鋸、および帯鋸を製造する方法

Also Published As

Publication number Publication date
EP1240965B1 (fr) 2008-04-23
MY139323A (en) 2009-09-30
DK1240965T3 (da) 2008-08-04
DE60226189D1 (de) 2008-06-05
CN1375384A (zh) 2002-10-23
ES2305196T3 (es) 2008-11-01
SE523982C2 (sv) 2004-06-08
PT1240965E (pt) 2008-07-28
CN1267258C (zh) 2006-08-02
SE0100895D0 (sv) 2001-03-15
SE0100895L (sv) 2002-09-16
SG109962A1 (en) 2005-04-28
ATE392976T1 (de) 2008-05-15

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