Classifications

• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
  • A01G23/00—Forestry
  • A01G23/02—Transplanting, uprooting, felling or delimbing trees
  • A01G23/099—Auxiliary devices, e.g. felling wedges

Definitions

• the present invention relates to an operating device for the controlled tilting of a portion of debited ⁇ ronc.
• nacelles arranged on a truck or trailer allowing an operator to be raised to the top of the trees on which he must intervene for pruning or felling work.
• Such mechanical units on a vehicle or on a trailer have the disadvantage of being of a very high cost price both for the purchase and for the rental, which prohibits the use for works of reduced duration.
• it is very often found that such units are not suitable for being placed at the foot of the tree to be worked, either because the available space is reduced, or because the ground does not allow the installation of such vehicles.
• the operator is then suspended from the trunk ready to cut it from the top into sections of a given height of the order of 1.50 m to give an idea.
• Each section must be cut on the one hand and overturned in a given direction so as to control the fall in the area provided on the other.
• the device according to the present invention is particularly suitable and makes it possible to overcome the problems of the prior art by providing operators means for working alone, not to complicate their maneuvers and to adjust the effort exerted.
• this device makes it possible to exert an inclination with a very significant lifting effort, without however requiring significant efforts on the part of the operator.
• the device makes it possible to exert the forces very gradually, in a perfectly controlled manner.
• the device can be removed delicately, without shock, without more effort than on insertion.
• the device according to the invention is very compact, which does not disturb the changes in the operator in the tree.
• the device is very light, which allows attachment to the harness. We also know that the chain saw can jam and get stuck under the log during cutting. In this case, the device allows the chainsaw to be released, which is a very important advantage. This release is carried out safely with delicacy, without dangerous movement of the ball during cutting vis-à-vis the operator.
• the device represented in FIG. 1 comprises a body 10 and a head 12 movable in rotation relative to the body 10, around an axis 14.
• the device comprises means 16 for driving between the body 10 and the head 12.
• the body 10 is of conical shape and advantageously carries a thread 18.
• This body is preferably made of a polymer material and molded to allow easy and inexpensive production.
• this body also carries an internal housing 20 adapted to receive for example a screw 22, arranged along the axis 14.
• This screw carries a head 24, projecting above the upper face of the movable head 12 rotating around axis 14.
• This body comprises notches 26, regularly distributed over the periphery in the upper part, opening at the interface 28 between the body 10 and the head 12.
• the head 12 carries a housing 30 in which the drive means 16 are arranged.
• These drive means comprise a pawl 32 oriented parallel to the axis 14.
• This pawl 32 comprises a bevel 34 subjected to the action of return means, for example a spring.
• return means places this projecting pawl, beyond the interface 28 in its drive-out position, capable of penetrating one of the notches 26.
• the pawl can also take a second position in which this pawl is completely retracted in the head.
• the pawl 32 is integral in rotation with a support 36 so as to orient the bevel 34 in one direction or the other, at 180 °.
• a lever 38 is attached. This lever is accessible in the housing 30.
• a handle 40 for hooking and maneuvering is secured to the head 12, according to a diameter.
• the device operates in the following manner, in particular with regard to FIGS. 2A, 2B and 2C.
• the operator generally provides a first cut-out 42 of the rocker forming a hinge and a deep slot 44. It is in this deep slot 44 that the body 10 is introduced. This is easy since the tip has a diameter smaller than that of the slot of a chainsaw.
• the operator When the tip is in the slot, the operator operates the handle 40 to rotate this head relative to the body.
• the pawl 32 is oriented in the direction where it locks in one of the notches 26, it rotates the body
• the polymer material has a very low coefficient of friction.
• the device makes it possible to spread the slot in progress in order to remove said chainsaw before continuing safely.
• the pawls can be fixed and the head can be movable in translation with means for returning the head against the body to allow disengagement when a pull is exerted on the handle.
• Means for connecting the device to the harness can be provided in the form of a flexible link on a reel so as not to cause the fall of said device.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Biodiversity & Conservation Biology (AREA)
• Ecology (AREA)
• Forests & Forestry (AREA)
• Environmental Sciences (AREA)
• Harvester Elements (AREA)
• Emergency Lowering Means (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=32104382

Family Applications (1)

Country Status (6)

Families Citing this family (3)

Family Cites Families (15)

• 2002
  • 2002-10-31 FR FR0213713A patent/FR2846514B1/fr not_active Expired - Fee Related
• 2003
  • 2003-10-30 AU AU2003288384A patent/AU2003288384A1/en not_active Abandoned
  • 2003-10-30 WO PCT/FR2003/050110 patent/WO2004040964A2/fr not_active Ceased
  • 2003-10-30 CA CA002543636A patent/CA2543636A1/fr not_active Abandoned
  • 2003-10-30 US US10/577,523 patent/US20070062608A1/en not_active Abandoned
  • 2003-10-30 EP EP03780300A patent/EP1558071A2/de not_active Withdrawn

Non-Patent Citations (1)

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