AT11450U1 - DEVICE FOR HARVESTING STANDING WOOD GOODS - Google Patents

Abstract

The invention relates to a device for harvesting stagnant wood products, such as trees, bushes or the like, comprising a frame (2), a cutter connected to the frame (3) with at least two pivotally mounted cutting blades (5a, 5b) and one on the cutting scissors (3) arranged gripping shears (4) with at least two pivotally mounted gripping arms (7a, 7b), wherein the cutting blades (5a, 5b) and gripping arms (7a, 7b) are actuated by drive means, wherein the drive means (6a, 6b, 9a, 9b) are coupled to each other, wherein the cutting blades (5a, 5b) and / or gripping arms (7a, 7b) when cutting or gripping the wood good to adapt to different shapes and irregularities of the wood good different degrees inward (towards each other) are pivotable.

Description

Austrian Patent Office AT 11 450 U1 2010-11-15

Description " DEVICE FOR HARVESTING STANDING WOOD GOODS " The present invention relates to a device for harvesting stagnant wood products, such as trees, bushes or the like, with a frame, a frame connected to the cutting scissors with at least two pivotally mounted cutting blades and arranged on the cutting scissors grab scissors with at least two pivotally mounted Gripping arms, wherein the cutting blades and gripping arms are actuated via drive means.

Such devices in which the wood to be cut is clamped with the aid of a clippers, while being cut at the desired location with a pair of cutting scissors, are known from the prior art. Thus, DE 4002950 A1 describes such a device, however, has the disadvantage that, for example, the gripper scissors in unevenly grown timber, such as uneven tree trunks, the wood material can not optimally grip because not both gripping arms have firm contact with the wood. As a result, it may happen, for example, that a truncated wood material slides during further transport from the grabber.

The present invention has for its object to provide a device for harvesting stagnant wood material available, which overcomes the disadvantages of the devices of the prior art.

This object is achieved by a device of the type mentioned above, which is characterized in that the drive means are coupled together such that the cutting blades and / or gripping arms when cutting or gripping the wood good to adapt to different shapes and irregularities of the Wood good different degrees inwards (towards each other) can be pivoted.

By the inventive device, for example, unevenly grown tree trunks can be contacted with two gripping arms of the gripper with the same intensity. This allows the timber material to be gripped safely regardless of its shape.

In order to pivot the cutting blades and / or gripping arms when cutting or gripping the wood good to adapt to different shapes and irregularities of the wood good different degrees inward, the drive means are usually coupled together via a controller. For example, when gripping a tree trunk of one of the two gripping arms already in contact with the trunk while the other is still out of contact, via the drive means which is connected to the gripping arm, which still has no contact with the trunk, another pivoting of this gripper arm in Directed on the trunk accomplished until this gripper arm has firm contact with the trunk. By contrast, the other gripping arm is not pivoted further inwards in order to avoid damaging the gripping shears.

The drive means may be, for example, pneumatic cylinders. However, the drive means are preferably hydraulic cylinders, since hydraulic cylinders can be controlled particularly well according to the above principle.

Advantageously, the hydraulic cylinders are coupled together via a single hydraulic circuit. This simplifies on the one hand the entire construction and on the other hand promotes a perfect interaction of the individual hydraulic cylinders.

In a particular embodiment of the device according to the invention each gripping arm and each blade is associated with a drive means, in particular hydraulic cylinder.

In a further embodiment of the device according to the invention the at least two gripping arms, a single drive means, in particular a single hydraulic cylinder, which is arranged between the two gripper arms associated. [0011] In a further embodiment of the device according to the invention, the at least two cutting blades are assigned a single drive means, in particular a single hydraulic cylinder, which is arranged between the two cutting blades.

Preferably, the cutting blades are mounted on two different, juxtaposed pivot axes, wherein the overlying gripping arms are preferably mounted together on a pivot axis. In general, all cutting blades and gripping arms are independently pivotable. The pivot axis of the gripping arms arranged above the pivot axes of the cutting blades is preferably arranged substantially centrally between the pivot axes of the cutting blades. In particular, by the provision of two independent juxtaposed pivot axes for the cutting blades is prevented that the wood material is pressed when closing the blades during the cutting process forward and thus from the cutting scissors. Rather, the wood is pulled during the cutting process to the center of force (cutting center) of the cutting scissors. The pivot axes are usually before as a pivot pin or pivot, with the help of the cutting blades or the gripping arms are also attached to the frame of the device.

Further features of the invention will become apparent from the following description of preferred embodiments of the invention in conjunction with the drawings and the dependent claims. Here, the individual features can be realized alone or in combination with each other.

In the drawings: [0015] FIG. 1: a top view of a device according to the invention; [0016] FIG. 2: a side view of the device of FIG. 1; 3 shows a circuit diagram of the hydraulic system of the device of Figure 1.

Figure 1 shows a plan view of an inventive device 1 with a frame 2, a frame connected to the cutting scissors 3 and a cutting scissors over the 3 arranged scissors 4. The cutting scissors 3 comprises two cutting blades 5a, 5b, offset from each other in two are arranged on superimposed planes. The cutting blades 5a and 5b are pivotally mounted on two juxtaposed pivot pin separated from each other. The cutting blades 5a and 5b are actuated by a respective hydraulic cylinder 6a and 6b. The cutting blades 5a and 5b are in communication with the respective piston rods of the hydraulic cylinders 6a and 6b.

The gripping shears 4 comprises two gripping arms 7a and 7b, which are pivotally mounted on a common pivot pin 8. The gripping arms 7a and 7b communicate with and are actuated by hydraulic cylinders 9a and 9b. The hydraulic cylinders 6a, 6b and 9a and 9b are coupled in such a way and controlled by a control block that, during the closing process, first the gripping shears 4 close with a preset closing force. Only then does the cutting shears 3 close to carry out the cutting.

The gripping arms 7a and 7b are when sharpening a wood good for adaptation to different shapes and irregularities of the wood good different degrees inward on the wood to be pivoted. In the present embodiment, this is achieved by the coupling and control of the individual hydraulic cylinders.

On the frame 2 of the device, a connection device 10 is further provided, to which a connection to a carrier, for example, boom of an excavator, tractor, etc. is possible. The connecting device 10 is pivotally connected to the frame 2. Between the frame 2 and the connecting device 10, a hydraulic cylinder 11 is arranged, which accomplishes the pivoting of the entire device 1 in its longitudinal axis. The hydraulic cylinder 11 is not integrated into the hydraulic circuit of the remaining hydraulic cylinders 6a, 6b, 9a and 9b.

In FIGS. 1 and 2, the hydraulic lines are not included for the sake of clarity

Claims (7)

Austrian Patent Office AT 11 450 U1 2010-11-15. The circuit diagram of the hydraulic circuit is shown in FIG. As can be seen in this diagram, the hydraulic circuit for the operation of the cutting blades (cutting 1, 2) and the gripping arms (gripper 1, 2) regardless of the hydraulic circuit for the actuation of the hydraulic cylinder 11 and is not in communication with this. For the operation of the cutting scissors or scissors first pressure is built up via the line 1. Now, first the hydraulic cylinders 9a and 9b of the gripping shears 4 are activated, so that the gripping shears 4 closes. Upon reaching a set pressure on the control member, the control member turns, so now the hydraulic cylinders 6a and 6b are activated to close the cutting shear 3 by pivoting the cutting blades 5 a and 5 b. If the cutting process is completed, the line 1 is depressurized and the line 2 is now pressurized. The distributor block now supplies the grippers and the cutting edges. This leads to the opening of the cutting scissors 3 as well as the gripping shears 4. Then the process can start from the beginning. When gripping an uneven wood good, such as an uneven tree trunk, the gripping arms 7a and 7b of the grabber 4 are both initially moved simultaneously inward on the timber to. If one of the two gripper arms 7a, 7b now encounters resistance, whereas the other gripper arm 7a, 7b is still out of contact with the wood material, only the gripper arm 7a, 7b, which still has no contact with the wood material, pivots inwards until it too Contact to the timber has. The intensity of the pivoting and thus the gripping intensity depends on the pressure previously set on the control element. REFERENCE LIST 1 Apparatus 2 Frame 3 Cutting scissors 4 Gripping scissors 5a, b Blades 6a, b Hydraulic cylinders 7a, b Gripping arms 8 Pivots 9a, b Hydraulic cylinders 10 Connecting device 11 Hydraulic cylinders Claims 1. Apparatus for harvesting stagnant wood products, such as trees, bushes or the like, with a Frame (2), a cutting scissors (3) connected to the frame with at least two pivotally mounted cutting blades (5a, 5b) and one on the cutting scissors (3) arranged gripper (4) with at least two pivotally mounted gripping arms (7a, 7b), the cutting blades (5a, 5b) and gripper arms (7a, 7b) being actuatable by drive means, characterized in that the drive means (6a, 6b, 9a, 9b) are coupled together, the blades (5a, 5b) and / or Gripping arms (7a, 7b) when cutting or gripping the wood good for adaptation to different shapes and irregularities of the wood good unterschiedli ch strong inward (towards each other) are pivotable. 2. Apparatus according to claim 1, characterized in that the drive means (6a, 6b, 9a, 9b) are hydraulic cylinders which are coupled together via a controller. 3. A device according to claim 2, characterized in that the hydraulic cylinders (6a, 6b, 9a, 9b) are coupled together via a single hydraulic circuit. 3/7 Austrian Patent Office AT 11 450 U1 2010-11-15 4. Device according to one of the preceding claims, characterized in that each gripping arm (7a, 7b) and each cutting blade (5a, 5b) is associated with a drive means, in particular hydraulic cylinder (6a, 6b, 9a, 9b). 5. Device according to one of claims 1 to 3, characterized in that the at least two gripping arms (7a, 7b) is associated with a single drive means, in particular a single hydraulic cylinder which is arranged between the two gripping arms (7a, 7b). 6. Device according to one of claims 1 to 3 or 5, characterized in that the at least two cutting blades (5a, 5b) is assigned a single drive means, in particular a single hydraulic cylinder which is arranged between the two cutting blades (5a, 5b) , 7. Device according to one of the preceding claims, characterized in that the cutting blades (5a, 5b) are mounted on two different, juxtaposed pivot axes, wherein the overlying gripping arms (7a, 7b) are preferably mounted together on a pivot axis (8) , 3 sheets of drawings 4/7