EP1941979B1 - Device for removing or reducing the root base of trees - Google Patents

Description

The invention relates to a device for removing or reducing the Wurzelanlaufs in tree trunks according to the preamble of claim 1 (see, eg EP 0 569 345 ).

State of the art

There are already different devices for removing or reducing the root start in tree trunks, hereinafter also referred to as "root reducer" known.

In such a root reducer, conveyor units are provided on a base frame for transversely feeding the logs to and from a machining position. In the processing position, a log is normally on two chain conveyor units, with which the tree can be rotated about its longitudinal axis. In the position on the chain conveyor, a holding-down device, which is likewise equipped with chain conveyor elements or with rollers, is pressed on and, at the same time, a milling shaft is moved up to the root starting areas, whereby the root start-up area is milled away while the tree is rotated.

After this process conveying arms transport the log further transversal, the processing point with a new tree trunk is populated. Alternatively, the transverse transport can also be done via a raised and lowered transverse conveyor to possibly promote tree trunks without further processing.

From the European Patent EP 0 477 166 B1 Another apparatus for reducing the root ends of tree trunks is known. This root reducer comprises a device for turning the tree trunk and a rotatable milling tool which can be set against the root end of the tree trunk. The means for rotating the log has a plurality of inclined to the horizontal and the longitudinal axis of the log obliquely Asked endless driver and a plurality of arranged at the lower end of the driver laterally applied to the tree trunk support rollers.

For root reducers, the turnaround time is always important.

Purpose and advantages of the invention

The invention has for its object to provide a device for removing or reducing the root start in tree trunks of the type described in the introduction, which allow a comparatively shorter cycle time including the Wurzelreduziervorgangs in a transversal transport of logs through the device.

This object is solved by the features of claim 1.

In the dependent claims advantageous and expedient developments of the invention are given.

The invention is based on a device for removing or reducing the root start in tree trunks, the Conveying means for rotating the tree trunks in a position in which the root emergence are removed, wherein a tree trunk rests on surface areas of the conveying means. The essence of the invention is that the conveying means are rotatably mounted with surface areas about an axis. That is, the conveyors themselves, not just any moving units on the trunks for the rotation of the trunks, can be rotated together with the surface abutment areas. Thus, the conveyor means are not only adapted to allow rotation of the log during root reduction, but may also provide transverse transport, for example when feeding the log in and out of the processing position by rotating the conveyor about its own axis. This opens up the possibility that input and Ausförderprozesse can overlap with a processing process at the root start-up area, whereby the lead time of a tree trunk can be reduced by the device as a whole. As a basis, the device preferably comprises a cross conveyor for feeding in and out of tree trunks. Within such a system, the funding is housed. Possibly. The system comprises a common frame on which input and output elements and the conveying means are arranged.

In addition, by means of the conveying means which can be rotated about themselves, the transport of the tree trunks transversally through the device can be made "softer" if e.g. Conveyor arms of the conveyor initially record the tree trunk continuously and after processing again pass continuously, to another transport device.

The conveying means preferably comprise chain conveyors, in particular a circulating chain track. This represents an already proven design of the funding for the put into rotation of a tree trunk.

In a further preferred embodiment of the invention, the conveying means form a V-shaped support. Basically, a strain lying in a "V" is fixed in position by the V geometry. By turning the conveying means, a trunk can be grasped and lifted for example with one side of the V-support, in particular so far that the tree trunk can not roll out of the "V" by itself. For this purpose, bearing surface areas of both V-sides should assume a smaller angle than 90 ° to a vertical. With appropriate design of holddown means, however, this is not mandatory. A transverse further transport after processing of the tree trunk can then be carried out after further rotation of the conveyor and thus the V-shaped support, preferably a V-side is lowered so far that the tree trunk already by gravity from the "V" rolls out or at least, by a support side of the "V" is not obstructed.

In a further preferred embodiment of the invention, the conveying means comprise at least two conveying elements, which are arranged at a distance from one another in an alignment corresponding to the desired position of the longitudinal extension of the tree trunk which is to lie therein. In this context, it is also preferred if the conveying means are arranged on a frame, which is designed in particular for a transversal transport of tree trunks. That the logs are transported transversely to the longitudinal axis through the frame. A station of the tree trunk then represents the position in the conveyor in which a root reduction can take place.

The conveying means comprise a plurality of individual conveying arms, in particular three conveying arms, which are arranged in star shape. For example, the conveyor arms at a uniform angular distance of 120 °. Depending on the rotational position of the total funding come as support surface areas different sections of the conveyor arms into consideration.

For receiving a tree trunk in particular rotate two on an axis successive conveyor with conveying arms out of a support frame out their conveyor arms in the direction of tree trunk, which has been promoted up to this point. By particularly synchronous further rotation of the conveyor, the tree trunk can be raised to bring him into a milling position. Even during the lifting, it is preferable to lower a hold-down device that cooperates with the conveying means in order to press the tree trunk onto the conveying means and to turn it into its own rotation. Rotational means for a self-rotation of the tree trunk about its longitudinal axis may be provided on the conveying means and / or on the hold-down. Upon further rotation of the conveyor about its axis takes place at the same time for lifting a transverse movement in which the tree trunk preferably transversely across the axis of rotation of the conveyor transversely on in particular one of the receiving side opposite side moves and stored there on a frame for further transport. For this purpose, the conveying arms of the conveyor preferably dive synchronously in a support frame on which the tree trunk remains.

Parallel to the turning process of the conveyor around its own axis not only the hold-down can fix a tree trunk in the conveyor. In addition, it is possible that during the removal process of the root starting area, the conveying means continue to rotate in a Stammauswerfrichtung. In this way, a root reduction process can be shortened in terms of time since processes which are otherwise sequential in sequence can be overlapped in time. Because while the other tree trunk is still reduced, a new tree trunk can be taken by the further rotation of the funding, wherein after the filing of the finished Reduced tree trunk is already pressed during the positioning of the newly recorded tree trunk for the Reduziervorgang this from the holddown in the funding. Thus, the machining process can start immediately after reaching an earliest possible "Reduzierposition". It is therefore no longer necessary that first a tree trunk is brought into the correct processing position, then a hold down this presses in the processing position and only then starts a machining process, the inclusion of a new tree trunk takes place only when the edited tree trunk completely "ejected "is. Rather, the processes of recording, holding down, editing and ejection now overlap in time.

In order to increase the degree of overlap, it is further suggested that the hold-down device can perform a larger transverse movement compared to known embodiments. This makes it possible to fix a tree trunk by pressing the blank holder already shortly after its inclusion in the funding, so that at a very early stage, a processing of the tree trunk can take place.

drawings

Two embodiments of the invention are illustrated in the drawings and are explained in more detail below, indicating further advantages and details.

Figuren 1a bis 1e

in unterschiedlichen Bearbeitungsphasen von Baumstämmen eine Vorrichtung zur Reduzierung bzw. Entfernung des Wurzelanlaufbereichs an Baumstämmen in einer stark vereinfachten Seitenansicht und

Figur 2a und 2b

einen Ausschnitt einer Vorrichtung nach den Figuren 1a bis 1e in einer vergrößerten Seitenansicht, die mehr Details wiedergibt, in zwei 8earbeitungssituatidnen.

Show it:

FIGS. 1a to 1e

in different processing phases of logs a device for reducing or removal of the root starting area on logs in a highly simplified side view and

FIGS. 2a and 2b

a section of a device according to the FIGS. 1a to 1e in an enlarged side view, which shows more details, in two processing situations.

Description of the embodiments

In the FIGS. 1a to 1e 2a and 2b are tree trunks in different phases through a device 1, shown for removal or reduction of the root canal on tree trunks. The passage direction through the device 1 is symbolized by an arrow 2. Tree trunks that have passed through the device preferably have a length of 3 - 6 m.

In FIG. 1a the device 1 is shown with three trunks 3a, 3b and 3c. While a log 3b is centrally positioned in the apparatus 1, a log 3a is inserted and a log 3c is being discharged.

In the position according to FIG. 1a the tree trunk 3b is processed in its root start-up area by means of a milling device 4, wherein a hold-down 5 presses the tree trunk 3b on bearing areas 6a, 6b of a conveyor 7 with conveying arms 7a to 7c.

Preferably, in a direction in which the tree trunk is to come to rest, a plurality of conveyors are axially behind each other set (not shown).

In milling mode according to FIG. 1a The tree trunk is rotated about its own longitudinal axis. For this purpose, chain conveyors 8a, 8b, 8c are provided both on the hold-down device 5 chain conveyors 5a, 5b and on conveyor arms 7a, 7b, 7c of the conveyor 7, which rotate endlessly through a corresponding drive unit 9 in the manner of a "digger track".

Chain conveyors are preferably not provided on all conveyors. For example, only the first two conveyors have chain conveyors. By contrast, the other conveyors can only rotate about their own axis in order to move the tree trunk transversely in synchronism with the other conveyors.

Part of the drive unit 9 may be drive pinion 9a, 9b.

In the milling process according to FIG. 1a the chain conveyors 5a, 5b of the hold 5 and at least the chain conveyors 8b, 8c of the conveyor 7 are active to rotate the log during the milling process with the milling device 4 at a desired speed.

During the milling process, the milling device 4 is pivoted to the tree trunk via an arm 4a. After completion of the processing, the milling device 4 is moved back from the tree trunk 3b, the hold-down 5 is raised, so that the conveyor 7 can rotate about its own AChse 10, which has a transverse movement of the tree trunk 3b in the conveying direction 2 result. At the same time, the tree trunk 3c has been conveyed by means of a transport arm 11 in order to make room for the tree trunk 3b in a storage chute 12 (see in particular FIG Figure 1c ) close. Meanwhile, a new log 3a is transported to the conveyor 7, via, for example, another transport arm 13 out of a storage chute 14.

Meanwhile, the conveyor 7 continues to rotate about its axis 10 so that the conveyor arm 7a can receive the log 3a from a cross conveyor 15 for machining with the milling device 4 (see in particular FIG Figure 1e ).

In the FIGS. 1a to 1e a process is shown that can be further optimized with regard to simultaneous processes for a tree trunk.

A larger overlap will be in the FIGS. 2a and 2b clarified. In the FIGS. 2a and 2b is the situation shown that immediately after the "ejection" of a tree trunk 16 of the conveyor 7 immediately a new tree trunk 17 is added for processing. This can reduce a processing cycle for a tree trunk.

In the FIGS. 2a and 2b Details of the chain conveyors 8a, 8b, 8c are shown on the conveyor arms 7a, 7b, 7c. The chain conveyors 8a, 8b, 8c are driven, for example, by means of drive pinions 9a seated on the axle 10.

LIST OF REFERENCE NUMBERS

1

Device for removing the root canal on tree trunks

2

arrow

3a

Tree trunk

3b

Tree trunk

3c

Tree trunk

4

milling device

4a

poor

5

Stripper plate

5a

chain conveyors

5b

chain conveyors

6a

support area

6b

support area

7

Conveyor

7a

conveying arm

7b

conveying arm

7c

conveying arm

8a

chain conveyors

8b

chain conveyors

8c

chain conveyors

9

drive unit

9a

driving part

9b

driving part

10

axis

11

transport arm

12

stock Kuhle

13

transport arm

14

stock Kuhle

15

cross conveyor

16

Tree trunk

17

Tree trunk

Claims (9)

1. Device for removing or reducing the root base of tree trunks (3a, 3b, 3c, 16, 17) with conveying means (5, 7) for rotating the tree trunks (3a, 3b, 3c, 16, 17) into a position in which the root bases are removed or reduced by means of a cutting device (4), wherein a tree trunk (3a, 3b, 3c, 16, 17) bears on surface areas (6a, 6b) of the conveying means (7), characterised in that the conveying means (7) are mounted rotatably about an axis (10) and comprise several individual conveying arms (7a, 7b, 7c) with bearing surface areas (6a, 6b) for a tree trunk, wherein rotating the conveying means (7) further about their own axis (10) causes a transverse movement of the tree trunks (3a, 3b, 3c, 16, 17) through the device.
2. Device according to claim 1, characterised in that the conveying means (5, 7) comprise a chain conveyor (5a, 5b, 8a, 8b, 8c).
3. Device according to one of the preceding claims, characterised in that the conveying means (7) form a V-shaped support.
4. Device according to one of the preceding claims, characterised in that the conveying means comprise at least two conveying elements (7) which are arranged spaced apart from one another in alignment.
5. Device according to one of the preceding claims, characterised in that the conveying means (7) is arranged on a frame (15), in that the tree trunks (3a, 3b, 3c, 16, 17) are transported transversely.
6. Device according to one of the preceding claims, characterised in that the conveying means (7) work together with a hold down device (5).
7. Device according to claim 6, characterised in that the movement of the hold down device (5) and the conveying means (7) is coordinated such that a tree trunk (17) is pressed onto the conveying means (5) before reaching its end position for the process of removing or reducing the root bases.
8. Device according to claim 6 or 7, characterised in the movement of the hold down device (5) and the conveying means (7) is coordinated such that during the removal or reducing procedure the conveying means (7) is rotated further in the ejection direction of the tree trunk.
9. Device according to one of the preceding claims 6 to 8, characterised in that the hold down device (5) can execute a greater transverse lift than known embodiments.

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