EP0070361A2 - Scie à moteur portative - Google Patents

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Publication number
EP0070361A2
EP0070361A2 EP82103869A EP82103869A EP0070361A2 EP 0070361 A2 EP0070361 A2 EP 0070361A2 EP 82103869 A EP82103869 A EP 82103869A EP 82103869 A EP82103869 A EP 82103869A EP 0070361 A2 EP0070361 A2 EP 0070361A2
Authority
EP
European Patent Office
Prior art keywords
saw
stop
holding
guiding device
feed direction
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
EP82103869A
Other languages
German (de)
English (en)
Other versions
EP0070361B1 (fr
EP0070361A3 (en
Inventor
Johannes Möhlenkamp
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.)
MOEHLENKAMP, MARKUS
MOEHLENKAMP, MICHAEL
Original Assignee
Mohlenkamp Markus
Mohlenkamp Michael
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 Mohlenkamp Markus, Mohlenkamp Michael filed Critical Mohlenkamp Markus
Priority to AT82103869T priority Critical patent/ATE18646T1/de
Publication of EP0070361A2 publication Critical patent/EP0070361A2/fr
Publication of EP0070361A3 publication Critical patent/EP0070361A3/de
Application granted granted Critical
Publication of EP0070361B1 publication Critical patent/EP0070361B1/fr
Expired 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
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/003—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for chain saws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/0083—Attachments for guiding or supporting chain saws during operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/02—Chain saws equipped with guide bar

Definitions

  • the invention relates to a hand-operated chain saw according to the preamble of patent claim 1.
  • Such hand-operated chainsaws in the form of circular, chain or band saws are preferably used as mobile brush cutters in forestry and agriculture. Here they are not only used for felling or cutting trees, bushes, etc. The like cutting material, but are also used for delimbing felled tree trunks.
  • delimbing with such saws is very time-consuming and strenuous and requires a great deal of skill. The risk of accidents is very high. For these reasons, especially in the case of weaker wood, delimbing can often no longer be carried out to the desired extent, as a result of which the entire processing of the wood is questioned.
  • the invention has for its object to provide a hand-operated chainsaw of the type specified, with the help of which in particular delimbing is much easier with lower demands on the skill of the operating personnel and with correspondingly reduced accident risks.
  • a non-slip position of the cutting members with respect to the branch or the corresponding material to be cut is ensured in that the branch before the start of a sawing operation from the spring-loaded member upstream in the feed direction of the saw is picked up and held securely.
  • an embodiment as a chain saw according to claim 8 is particularly preferred for forestry operation.
  • This configuration also provides a very favorable working height, which further facilitates the easy, simple handling of the saw during operation.
  • the carrying sword 1 is firmly connected on its upper side 4 to a motor housing containing a drive motor together with a handle device, as is also the case in this end region with the drive from the drive motor in a manner known per se via a drive sprocket to the rest in the circumferential guide groove rotating saw chain is transferred.
  • the carrying sword 1 For sawing off material to be cut, in particular branches from felled, lying tree trunks, the carrying sword 1 is provided at its deflecting end 3 with a spring-loaded stop 5 for receiving the branch.
  • the stop 5 is normally featured in the position of the orbit of the saw chain 2 shown in the drawing stores, in the feed direction indicated by the arrow 6 in the extension of the longitudinal central axis of the support sword 1, in which the saw is advanced to saw off a branch.
  • the stop 5 has two angularly projecting gripping legs 7 and 8, which merge into one another at their inner ends and, with their mutually facing inner sides 9 and 10, a receiving mouth for branches and the like. Like. form material to be cut.
  • the stop 5 is supported for a relative movement against the feed direction 6 of the saw movably on the carrying sword 1 and for this purpose comprises a support area 12 resting on the upper side 4 of the carrying sword 1, through which the gripping legs 7 and 8 are held at a short distance above the saw chain 2 .
  • a middle guide member 13 adjoins downward, which engages in a guide track 14 incorporated in the vertical longitudinal center plane of the support sword 1, which in the example shown has the shape of a longitudinal slot, the depth of which corresponds to the thickness of the support sword 1.
  • the stop 5 is provided with a support shoe 15 which grips under the carrying sword 1 and is located below the guide member 13 and can be moved together with the stop 5.
  • the support shoe 15 with the the support area 12 and the guide member 13 comprising stop unit by a screw connection indicated at 16. While the support area 12 is slidably supported with its underside on the upper side 4 of the support sword 1, the support shoe 15 is displaceable with its upper side on both sides of the guide member 13 along the underside 17 of the support sword 1.
  • a spring contact member 18 which is formed by an elongated rod 19 in the example shown.
  • the rod 19 is firmly connected at one end to the guide member 13 of the stop unit 5, extends through the guide track 14 of the carrying sword 1 and is provided at its other, free end with an abutment plate 20 guided vertically upward from the guide track 14.
  • the plate 20 rests on a compression spring 21 which acts on the face 5 in the feed direction 6 of the saw, e.g. a coil spring, the other end of which is supported on a rear wall 22 of a spring housing 23 which is open at the front.
  • the spring housing 23 has a central main part 24 which supports the compression spring 21 and which is adapted to its contour and which is fastened on the upper side 4 of the support sword 1 with the aid of lateral housing flanges 25.
  • the guide housing 23 or its main part 24 can also be provided with mutually opposite lateral guide tracks 26 for guiding the spring contact plate 20, which for this purpose can be provided with lateral guide members (not shown) which engage in the guide tracks 26.
  • the support sword 1 is on the Place the top of a trunk with the support shoe 15 of the stop 5.
  • the underside 27 of the support shoe 15 is concavely curved to adapt to the convex curvature of the tree trunk, as can be seen from FIG. 3.
  • the support sword 1 is pushed in the feed direction 6, ie from behind, onto the branch with a sliding forward movement of the support shoe 15 until the branch is received and held in the receiving mouth of the stop 5.
  • the pressure exerted by the compression spring 21 on the stop 5 is overcome and this undergoes a relative movement against the feed direction 6, ie to the rear, so that the initially held at a short distance in front of the orbit of the saw chain 2 Branch reaches the 'revolving plane of the saw chain 2 and is sawn off progressively by steadily pressing the carrying sword 1 with a corresponding further backward movement of the stop 5 and compressing the compression spring 21 when the engine is switched on.
  • the stop 5 is automatically pushed back by the compression spring 21 to the starting position shown in the drawing.
  • branches that can only be sawed off with great difficulty in the top area of a lying trunk can be removed with particular ease because in these cases the support sword 1 with the support shoe 15 simply slides in the upper arch area of the trunk can be performed with little effort. Thanks to the secure hold that the branches to be sawn off in stop 5 during the sawing process, however, branches that have a different position on the lying log are comparatively easy to cut off saw.
  • the simple handling is further favored by the fact that it is possible to work in the manner described parallel to the longitudinal direction of the trunk and that the saw or the carrying sword 1 only ever has to be rotated about the longitudinal axis when changing to another branch to be cut off.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Electromechanical Clocks (AREA)
EP82103869A 1981-07-22 1982-05-05 Scie à moteur portative Expired EP0070361B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82103869T ATE18646T1 (de) 1981-07-22 1982-05-05 Handbetaetigte motorsaege.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813128974 DE3128974A1 (de) 1981-07-22 1981-07-22 Handbetaetigte motorsaege
DE3128974 1981-07-22

Publications (3)

Publication Number Publication Date
EP0070361A2 true EP0070361A2 (fr) 1983-01-26
EP0070361A3 EP0070361A3 (en) 1983-11-16
EP0070361B1 EP0070361B1 (fr) 1986-03-19

Family

ID=6137493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103869A Expired EP0070361B1 (fr) 1981-07-22 1982-05-05 Scie à moteur portative

Country Status (3)

Country Link
EP (1) EP0070361B1 (fr)
AT (1) ATE18646T1 (fr)
DE (2) DE3128974A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2301061A (en) * 1995-05-26 1996-11-27 Francis Edward Kennaway Bolton A safety system for chain saws.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2902065A (en) * 1957-10-18 1959-09-01 Jerrimiah C Graves Power saw blade anchoring device
US2925105A (en) * 1956-12-18 1960-02-16 Ernest A Hayden Chain saw equipped with bar stops
US2930416A (en) * 1958-02-17 1960-03-29 Granberg Elof Chain saw attachment
DE2164372A1 (de) * 1971-12-23 1973-06-28 Stihl Maschf Andreas Motorisch betriebene einmannsaege
DE2735617A1 (de) * 1977-08-06 1979-02-15 Willi Hiemer Saege fuer die land- und forstwirtschaft
US4270272A (en) * 1980-01-25 1981-06-02 Graham William W Brush cutting attachment for chain saw

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3680607A (en) * 1970-06-29 1972-08-01 Vernon S Robinson Chain saw guide

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925105A (en) * 1956-12-18 1960-02-16 Ernest A Hayden Chain saw equipped with bar stops
US2902065A (en) * 1957-10-18 1959-09-01 Jerrimiah C Graves Power saw blade anchoring device
US2930416A (en) * 1958-02-17 1960-03-29 Granberg Elof Chain saw attachment
DE2164372A1 (de) * 1971-12-23 1973-06-28 Stihl Maschf Andreas Motorisch betriebene einmannsaege
DE2735617A1 (de) * 1977-08-06 1979-02-15 Willi Hiemer Saege fuer die land- und forstwirtschaft
US4270272A (en) * 1980-01-25 1981-06-02 Graham William W Brush cutting attachment for chain saw

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2301061A (en) * 1995-05-26 1996-11-27 Francis Edward Kennaway Bolton A safety system for chain saws.

Also Published As

Publication number Publication date
ATE18646T1 (de) 1986-04-15
DE3269939D1 (en) 1986-04-24
DE3128974A1 (de) 1983-02-17
EP0070361B1 (fr) 1986-03-19
EP0070361A3 (en) 1983-11-16

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