DE8514381U1 - Delimbing saw - Google Patents

Description

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The invention relates to a delimbing saw whose saw ^ sheet arranged at one end of a preferably telescopic rod and by means of one on the rod / preferably at the other end of the same, arranged or attachable motor relative to the rod in the sense of translational, alternating movements occurring in the longitudinal direction of the saw blade can be driven.

Such delimbing saws are known from DE-OS 31 44 132, DE-GM 81 32 511 and DE-OS 32 13 185.

The main purpose of these saws is to remove the crown of a tree, especially a fruit tree, from the ground without using it a ladder or the like. to thin out. With the well-known delimbing saws the saw blade is arranged with its longitudinal axis in extension of the rod axis. This will a visual inspection of the sawing work from the ground is difficult. In addition, this arrangement is not functional in this respect completely satisfactory when the branch to be separated is mainly sawed from the side and therefore Under certain circumstances, relatively large strands of wood can be carried away from the trunk-side branch or trunk, if the Saw cut has reached a depth at which the sawn branch breaks off under its own weight. Furthermore the sawing performance is also limited by the fact that the saw blade may be at an angle to the longitudinal extension of the Astes is guided and accordingly creates a disproportionately large step area.

It is therefore the object of the invention to provide a delimbing saw to create, which can be handled particularly well with improved work performance.

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This object is achieved in that the saw blade is arranged with the longitudinal axis inclined to the axis of the rod within a plane spanned by these axes or parallel to these axes.
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Due to this arrangement, the respective position of the saw blade can be clearly recognized visually from the ground. About that In addition, the cutting direction and cutting plane is also conveyed via the sense of touch of the hands leading the bar, because the reciprocating saw blade reacts transversely to the rod axis according to its direction of movement exercises. In particular, it is advantageous that, in order to achieve a cut surface that is as flat as possible, it is sufficient if the rod the hands are slightly loaded in the direction of the rod axis.

In addition, the branch to be separated is essentially cut through from its upper side.

According to an expedient embodiment of the invention, it is easily possible to place the saw blade on both longitudinal edges to interlock, whereby on the longitudinal edge that encloses the smaller angle with the rod axis, i.e. on the Sawing down the longitudinal edge, preferably a coarse toothing and on the other longitudinal edge a finer one Toothing is arranged. The toothing that points upwards during the sawing work is expediently used to Saw a branch to be cut from below before making the actual cut, in order to make a Break off the branch to prevent longer strips of bark from being separated. The saw toothing is preferred designed so that the saw blade cuts in both directions of movement. The toothing is accordingly preferably designed symmetrically or approximately symmetrically.

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The use of the toothed longitudinal edge of the saw blade, which points upwards when sawing, is made easier if the two toothed edges of the saw blade under one to the bar open acute angles are arranged / with the edge which includes the smaller angle with the rod axis, extends approximately parallel to the longitudinal axis of the saw blade.

In the following, the invention is based on a preferred one Embodiment explained in more detail, which is shown in the drawing. The only figure shows one Side view of the sageblattsextxgen end of the scanning saw according to the invention.

At one end of a tubular rod 1, a housing is arranged which accommodates a gear for driving a saw blade 3 which is mounted displaceably ^{on a guide part 2 1 of the housing 2.} The gear is driven via a shaft arranged in the rod 1 by a motor arranged in the area of the other end of the rod 1, and in turn drives the saw blade 3, for example by means of a crank disk, the crank pin of which in a transverse slot of the saw blade or a part connected to it is recorded like a backdrop.

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The guide part 2 'of the housing 2 receiving the saw blade 3 and its part connected to the rod .1 form an angle such that the saw blade 3 is arranged obliquely to the axis of the rod 1 in the manner shown in the figure. Accordingly, one longitudinal edge of the saw blade 3 forms an obtuse angle m with the rod axis, while the other length of the saw blade 3 and the rod axis form an angle A which is greater than 180 °.

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The saw blade 3 has two sawtooth riders, each with an approximately symmetrical SMgezahnpröfil, which has comparable cutting effects in both directions of movement of the saw blade 3. The sawtooth profile of the edge 3 ^{1 is} relatively coarse, while a comparatively fine sawtooth profile is arranged on the edge 3 "so that the two edges 3 ¹ and 3" have correspondingly different cutting speeds when sawing.

As shown, the two edges 3 'and 3 "are preferably formed an acute angle open towards the rod 1,

jj where the edge 3 'is approximately parallel to the direction of movement of the

Saw blade 3 is arranged.

To cut off a branch, it is first something i; at the bottom with the toothed edge 3 "sawn until the bark

is completely severed on this side. Then the branch is cut through from above by means of the sawtooth edge 3 '. As soon as the severing cut has been made sufficiently far, the branch usually breaks off under its own weight, whereby the previous cutting of the bark on the underside of the branch prevents the bark strips from remaining standing Branch or trunk are dragged along.

Ί 25 If the rod 1 when performing the severance cut ·; constantly slightly downwards in the direction of the rod axis

is drawn, becomes a particularly flat cut surface generated.

Claims (6)

Expectations 1. Delimbing saw, the saw blade of which is arranged at one end of a preferably telescopic rod and by means of a motor arranged or attachable to the rod, preferably at the other end thereof relative to the rod in the sense of translatory, alternating movements in the longitudinal direction of the saw blade can be driven, characterized in that the saw blade (3) with the axis of the rod (1) inclined longitudinal axis within a plane parallel to these axes or spanned by these axes is arranged. ROTERMUND ₍₍₍ MANITZ ₍ FINSTERWALD ^ HEYN- MORGAN Seelbergetri 23 / 25.7000 Stutteart'5 * 0. ί 'RObert.Keeh.StiUäboo'München 22 Telephone <O7I1) 56726), **, "tqlefojl COfcp) 2242 ¹ UiTTeIe. * S2 ^ 672patmf Telex 72S4475paro · · TiJiefa. * {089} 2S "75.tS (Gf ll + ll |> ' Deutsche Bank AG 2199iS (BLZ 60070070) Landesolrokasse Stuttgart 2 090 616 (BLZ 600 501 Oi) Cennütntter Volksbank 500 429 006 (BLZ 600 904 00) Postgiroamt Stuttgart 407 34-706 (BLZ 600 100 70) 2. delimbing saw according to claim 1, characterized in that the longitudinal axis of the saw blade (3) opposite the Axis of the rod (1) at an angle between 20 ° and , 40, preferably inclined at an angle of about 30 ° is. 3. delimbing saw according to one of claims 1 or 2, ■ characterized in that the saw blade (3) on both Longitudinal edges (3 ', 3 ") is toothed. 10 4. delimbing saw according to claim 3, characterized in that Ϊ. that the two toothed edges (3 ', 3 ") of the saw blade '(3) at an acute angle open towards the rod are arranged, wherein the edge (3 ¹ ), which includes the smaller angle («<.) with the rod axis,; approximately parallel to the longitudinal axis of the saw blade (3) he is stretching. 5. delimbing saw according to one of claims 3 or 4, 20 characterized in that the edge (3 ¹ ) of the saw (; blade (3), which with the rod axis the smaller Angle (oC) includes, is roughly toothed, while the other edge (3 ") has fine teeth. 6. delimbing saw according to one of claims 1 to 5, characterized in that the saw blade (3), at least on the longitudinal edge (3 ¹ ) which forms the smaller angle (oL) with the longitudinal axis of the rod (1), has a particularly symmetrical or cutting edge in both directions of movement of the saw blade (3). has approximately symmetrical teeth.