EP0070361B1 - Scie à moteur portative - Google Patents

Scie à moteur portative Download PDF

Info

Publication number
EP0070361B1
EP0070361B1 EP82103869A EP82103869A EP0070361B1 EP 0070361 B1 EP0070361 B1 EP 0070361B1 EP 82103869 A EP82103869 A EP 82103869A EP 82103869 A EP82103869 A EP 82103869A EP 0070361 B1 EP0070361 B1 EP 0070361B1
Authority
EP
European Patent Office
Prior art keywords
saw
stop
holding
guiding device
cutting members
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
Application number
EP82103869A
Other languages
German (de)
English (en)
Other versions
EP0070361A3 (en
EP0070361A2 (fr
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

Links

Images

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 and are used in particular for delimbing felled tree trunks and standing trees. Delimbing with such saws is very time-consuming and energy-intensive and requires a lot of skill. The risk of accidents is very high. The stop provided on the holding and guiding device of the saw for receiving the branch is intended to remedy this.
  • the stop is formed as the edge of a recess in a protective device which is firmly connected to the holding and guiding device of the saw by means of screws.
  • the two edges of the recess protrude only with their free end regions of the cutting members of the saw, and to carry out a delimbing operation, only the front edge in the circumferential direction of the cutting members is brought to rest on a protruding branch in order to guide the saw in the longitudinal direction, while the opposite the leading edge of the flattened trailing edge of the recess should ensure better sliding of the sawn off branches as well as the holding and guiding device over the remaining branches.
  • the opening width of the recess in the known chain saw depends on the branch thickness of the trees to be branched. However, since very different branch thicknesses occur in nature, the use of the known stop is limited and associated with dangers. If the recess is presented with thin branches, the diameter of which is smaller than the opening width of the recess, the sawing forces of the cutting members with the branch can cause the resulting forces that the saw jumps off the branch as a result of the play between the edges of the recess, while one of Thicker branch approached to the saw, the diameter of which exceeds the opening width of the recess, is clamped between the edges, which can result in damage to the stop and / or the cutting members of the saw.
  • the invention has for its object to provide a hand-operated chainsaw of the type mentioned, the stop is designed so that with substantially unrestricted use of the stop delimbing places less demands on the skill of the operating personnel and is significantly easier with correspondingly reduced accident risks.
  • a non-slip position of the cutting members with respect to the branch or corresponding material to be cut is ensured in that the branch is picked up and held securely by the receiving mouth formed by the gripping legs of the spring-loaded stop in the feed direction of the saw before the start of a sawing process. Because the receiving mouth of the stop is in front of the orbit of the cutting members, the opening width between the two gripping legs is not critical, and a large variety of different branch diameters can be received without damage to the stop and the 'cutting members, so that the stop in its application is practically unlimited. Purch pressing the saw with its cutting members against the branch held in the stop, the stop moves back against the feed direction of the saw while overcoming the spring force.
  • an embodiment as a chain saw according to claim 7 is particularly preferred for forestry operation.
  • FIG. 1 In the drawing is an example of a manual chain saw with a stop and guiding device guided, by means of an internal combustion engine or electric motor, rotating cutting links a chainsaw with an elongated, flat support sword 1 made of steel as a holding and guiding device for the cutting links.
  • the cutting links are formed in a manner known per se from saw teeth firmly connected to the chain links of a saw chain indicated by two-dot chain lines.
  • the saw chain 2 is guided on the circumference of the support sword 1 in a circumferential guide and transport groove (not shown), the support sword 1 having two end-side deflection areas, of which only one front deflection end 3 is shown in the drawing.
  • 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 cut material, in particular branches of 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 upstream in the position of the orbit of the saw chain 2 shown in the drawing, in the feed direction indicated by the arrow 6 in the extension of the longitudinal central axis of the carrying 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 support sword 1 and for this purpose comprises a support area 12 resting on the upper side 4 of the support 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 which is located below the guide member 13 and can be moved together with the stop 5.
  • the support shoe 15 is firmly connected to the stop unit comprising the support area 12 and the guide member 13 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 which extends vertically upward from the guide track 14.
  • the plate 20 rests on a compression spring 21 which acts on the stop 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 placed on 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 match 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 in the orbital plane the saw chain 2 arrives 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 into its starting position shown in the drawing by the compression spring 21.
  • 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 Support can be performed with little effort. Thanks to the secure hold that the branches to be sawn off in the stop 5 during the sawing process, however, branches that have a different position on the lying log are comparatively easy to saw off.
  • the ease of use 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 transitioning 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)

Claims (7)

1. Scie à moteur portative comportant des éléments de coupe tournants sur la périphérie, guidés par un dispositif de maintien et de guidage (1), pouvant être entrainés par un moteur, et comportant une butée (5) prévue sur le dispositif de maintien et de guidage (1), caractérisée en ce que la butée (5) présente deux bords de prise (7, 8) qui se détachent l'un de l'autre en formant un angle et qui constituent, par leurs faces interieures (9, 10) tournées 1,une vers 1, autre, une machoire de réception pour des branches et produits analogues à couper, étant précisé que la mâchoire est placée en avant, dans la direction de l'avance (6) de la scie, de la voie périphérique des éléments de coupe; et en ce que la butée (5) est sollicitée par la force d'un ressort dans la direction de l'avance (6) et s'appuie contre le dispositif de maintien et de guidage (1) avec possibilité de déplacement relatif en sens opposé à la direction de l'avance (8), en surmontant la force du ressort.
2. Scie selon la revendication 1, caractérisée en ce que la face intérieure (10), dirigée en sens opposé à la direction périphérique (11) des éléments de coupe, de l'un des bords de prise (8) est dentelée.
3. Scie selon la revendication 1 ou la revendication 2, caractérisée en ce que le dispositif de maintien et de guidage (1) est constitué d'une plaque, d'un rail ou d'un ensemble d'appuis analogues qui dégage, par zone, les éléments de coupe pour venir au contact du produit à couper et qui comporte une voie de guidage (14) pour le déplacement de la butée (5) qui se loge, par un élément de guidage (13) dans la voie de guidage.
4. Scie selon l'une des revendications 1 à 3, caractérisée en ce que la butée (5) comporte un élément d'appui à ressort arriere (18) qui s'appuie contre un ressort de compression (21) qui sollicite la butée dans la direction de l'avance (6) de la scie et dont l'autre extrémité s'appuie dans un carter (23) fixé au dispositif de maintien et de guidage (1).
5. Scie selon l'une des revendications 1 à 4, caractérisée en ce que la butée (5) comporte un sabot d'appui (15) qui saisit par dessous le dispositif de maintien et de guidage (1) et qui peut se deplacer en commun avec la butée (5).
6. Scie selon la revendication 5, caractérisée en ce que la face inférieure (27) du sabot d'appui (15) a une forme concave.
7. Scie selon les revendications 1 à 6, caractérisée en ce que les éléments de coupe sont constitués, de façon connue en soi, de dents de scie solidarisées avec les maillons de chaîne d'une chaîne de scie (2), étant précisé que la chaîne de scie est guidée sur la periphérie d'une lame support, servant de dispositif de maintien et de guidage (1), de forme allongée, plate et présentant deux zones de changement de direction opposées l'une à l'autre pour la chaîne; et en ce que la butée (5) est disposée à une extrémite de changement de direction (3) de la lame support, tandis qu'à la zone opposée de changement de direction de la lame support est rapporté, sur la face superleure (4) de la lame support, un carter moteur contenant le moteur d'entrainement, avec dispositif de prise en main.
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 EP0070361A2 (fr) 1983-01-26
EP0070361A3 EP0070361A3 (en) 1983-11-16
EP0070361B1 true 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)

Families Citing this family (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.

Family Cites Families (7)

* 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
US3680607A (en) * 1970-06-29 1972-08-01 Vernon S Robinson Chain saw guide
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

Also Published As

Publication number Publication date
EP0070361A3 (en) 1983-11-16
EP0070361A2 (fr) 1983-01-26
DE3128974A1 (de) 1983-02-17
ATE18646T1 (de) 1986-04-15
DE3269939D1 (en) 1986-04-24

Similar Documents

Publication Publication Date Title
EP0242733B1 (fr) Dispositif pour scier
DE2703222A1 (de) Vorrichtung zum saegen von nutzholz mit gekruemmtem schnitt
EP0682589B1 (fr) Poignee interchangeable pour cales coulissantes
EP3256297B1 (fr) Machine à tronçonner à main pourvue d'un dispositif de réglage de profondeur
DE2838459A1 (de) Vorrichtung fuer tragbare motorkraftsaegen
DE3439569A1 (de) Dornenanschlag fuer motorkettensaegen
DE3800935A1 (de) Ritzvorrichtung
DE3044395A1 (de) Fleisch- und knochenbandsaege
DE934789C (de) Hilfsvorrichtung fuer elektrische Handkreissaegen
EP0070361B1 (fr) Scie à moteur portative
EP2974824B1 (fr) Système de guidage doté d'une machine-outil portative et rails de guidage
DE1627243A1 (de) Kettensaege mit Schaerfeinrichtung
EP1529611B1 (fr) Dispositif de coupe de bois
EP1418018A1 (fr) Rail de guidage pour machines-outils à main avec butée associée
EP2974839B1 (fr) Machine de coupe manuelle ayant deux paliers de guidage à onglet
DE3838422C1 (en) Work-gripping attachment with clamping jaws for sawing machines
DE690791C (de) Vorrichtung zum Ablaengen von Hoelzern mittels Motorkettensaegen
DE3347920A1 (de) Saegeeinrichtung
EP2974838B1 (fr) Machine de coupe manuelle ayant un système de palier à onglet pouvant etre fixé
EP0712686A1 (fr) Rail de guidage
DE2737888A1 (de) Schere, insbesondere gartenschere
WO2009097879A1 (fr) Scie circulaire à réglage d'inclinaison
EP1203645B1 (fr) Procédé et dispositf pour le sciage des troncs d'arbres
DE3719461C1 (en) Motor-driven pruning saw
DE2750712A1 (de) Vorrichtung zum positionieren von werkzeugen zur bearbeitung bewegter werkstuecke

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT CH DE FR IT LI

17P Request for examination filed

Effective date: 19840128

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MOEHLENKAMP, MARKUS

Owner name: MOEHLENKAMP, MICHAEL

Owner name: MOEHLENKAMP, JOHANNES

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE FR IT LI

REF Corresponds to:

Ref document number: 18646

Country of ref document: AT

Date of ref document: 19860415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3269939

Country of ref document: DE

Date of ref document: 19860424

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19910531

Year of fee payment: 10

Ref country code: AT

Payment date: 19910531

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910621

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910625

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19920505

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19920531

Ref country code: CH

Effective date: 19920531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930129

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930202

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST