Timber trailer

Abstract

Forwarding trailer for forestry and agricultural use, comprising a longitudinal frame (3, 4, 5; 14; 15) with axle carrier, axle and wheels, and stake benches slidably fixed to the frame for receiving stakes (1) as lateral load supports, wherein the respective stake bench has retaining means adapted to the cross-section of the frame, encompassing it, characterized in that the longitudinal frame is designed as a multi-beam frame (14; 15) or central beam frame (3, 4, 5) with or without laterally spaced auxiliary beams (4, 5), wherein the respective stake bench has a support (2) whose dimension is at least equal to the width of the longitudinal frame (3) with its beams (4, 5; 14, 15), wherein the upper surfaces of the beams form a bearing surface for the underside of the support (2) and a first sliding surface is provided between these surfaces, furthermore the retaining means each comprise a pair of retaining plates (8;9) having at least one of the spars (3), guided by it, which laterally engages, wherein a second sliding surface is formed between the retaining plates (8; 9) and the respective surface side of the spar, the respective pairs of retaining plates are clamped by means of a screw or bolt connection (11) and a third sliding surface is provided between the screw or bolt connection and the underside of the spar.;

Description

[0001] The invention relates to a logging trailer for forestry and agricultural use, comprising a longitudinal frame with axle support, axle and wheels as well as stanchion banks that can be displaceably fixed to the frame for receiving stanchions as lateral load supports, wherein the respective stanchion bank has holding means adapted to the cross-section of the frame, encompassing the latter, according to the preamble of claim 1.

[0002] EP 2 565 077 A1 discloses a logging trailer workstation for forestry and agricultural use. This workstation comprises a frame with an axle carrier, axle, and wheels, stakes attachable to the frame, and a console located at the trailer head for mounting a loading crane or similar work equipment.

[0003] According to the invention therein, the frame consists of a centrally positioned central tube and two subframe tubes running parallel to it. Recesses are provided in each subframe tube for securing the stakes against rotation. Furthermore, the axle carrier is arranged so that it can be moved longitudinally relative to the frame. Hydraulically extendable lateral support legs are provided at the front of the vehicle.

[0004] DE 10235922 B4 discloses a method for changing the area of ​​a load space of a work machine.

[0005] To modify the load space, the possibility of telescopically extending the stanchions defining the load space is demonstrated. It is also mentioned that it is known that stanchions can be designed to be laterally movable.

[0006] Changing the area and height of a load compartment is necessary when it is necessary to utilize the entire capacity of a cargo transport vehicle.

[0007] In this regard, DE 10235922 B4 demonstrates the modification of the load space without additional means. The weight of the supported load should not allow any shifting of the stanchion positions. The stanchions essentially serve as lateral support, preventing horizontal load shifting. The frame section supporting the stanchions is sometimes bent to create a U- or Y-shape, with the load being distributed vertically in the aforementioned Y-direction. To adjust the spacing of the stanchions, a pendulum arm is designed, which is attached at its end to an output part and is arranged to rotate about a pivot axis by means of a joint.

[0008] The generic document WO 2023 / 234876 A1 discloses a forestry trailer in the form of a logging trailer with a central frame.

[0009] The cross-section of the central frame has a diamond shape or the shape of a square standing on its tip.

[0010] This central frame accommodates a trailer coupling and a protective grille on the front.

[0011] At the rear, a lighting device can be connected to the central frame.

[0012] Furthermore, a large number of stanchion benches with vertically fixed stanchions are provided.

[0013] A support connecting the stanchions features a retaining element. The retaining elements are V-shaped and enclose the central frame.

[0014] The two-part design of the retaining elements and the provided screw connections allows the relevant stanchions or stanchion bank to be moved longitudinally along the central frame after loosening the corresponding screw connections. Once the desired final position is reached, the mechanical connection can be reestablished using the retaining elements and screw connections.

[0015] A shifting of the stanchion bank in question is therefore only possible after a laborious loosening of the screw connections on the holding devices and later re-screwing.

[0016] Particularly in agricultural and forestry conditions, significant contamination can be expected both in the area of ​​the central frame and around the bolted connections of the securing devices. This includes corrosion, damage to the screw heads and the securing devices themselves, and similar issues. In practice, it is virtually impossible to adjust the stanchion spacing along the trailer's length quickly, safely, and easily on-site.

[0017] From the above, it is the object of the invention to provide a further developed logging trailer for forestry and agricultural use, which makes it possible in a simple manner to achieve a longitudinal adjustment of the stanchion banks with stanchions without the need for a complex loosening of force- or form-fitting connections.

[0018] The desired longitudinal displacement of the stanchion banks should be easily achieved by applying a mechanical displacement force. If necessary, this displacement should also be possible by applying lateral force to the stanchion bank using an on-board crane.

[0019] The object of the invention is achieved by a logging trailer according to the combination of features set forth in claim 1, wherein the subclaims comprise at least suitable embodiments and refinements. Accordingly, a logging trailer for forestry and agricultural use is assumed, comprising a longitudinal frame with an axle carrier, axle, and wheels.

[0020] Furthermore, the logging trailer has slidably fixable stake benches on the frame for accommodating stakes as lateral load supports.

[0021] Each stake bank has holding means adapted to the cross-section of the frame, encompassing it.

[0022] According to the invention, the longitudinal frame of the logging trailer is designed as a multi-beam frame or central beam frame with laterally spaced auxiliary beams.

[0023] Each stanchion bank has a support whose extension is at least equal to the width of the longitudinal frame with its beams, whereby the upper sides of the beams form a support surface for the underside of the support.

[0024] A first sliding surface is provided between these sides.

[0025] Furthermore, the holding means each have a pair of holding plates which laterally encompass at least one of the bars, guided by the latter, wherein a second sliding surface is formed between the holding plates and the respective surface side of the bar.

[0026] The respective pairs of retaining plates are clamped together using screw or bolt connections. A third sliding surface is provided between the screw or bolt connection and the underside of the beam.

[0027] The sliding surfaces can be designed as inserted, embedded or attached sliding pieces or, for example, as applied sliding coatings.

[0028] In addition, dirt wipers are provided on the carrier that act in the direction of the beams, so that the sliding movement can be carried out without any problems in practical use.

[0029] At least the third sliding surface also has an additional function as a dirt wiper or dirt deflector.

[0030] The friction force for the application-related displacement of the stanchion bank can be specified by means of the tensioning using the screw or bolt connection.

[0031] The laterally encircling retaining plates, along with their screw or bolt connections and sliding surfaces, ensure the desired displacement and also ensure that the set position is maintained during operation. Positioning is ultimately also secured by the presence of a suitable load, such as long or short timber, on the logging trailer. The respective stanchion bank is moved by mechanical action on it, in the longitudinal direction. This can be done, for example, using a crane grab, but also manually or by hydraulic force.

[0032] In a further development of the invention, the distance between the stanchions on the respective stanchion bank is adjustable, so that further adaptation to the respective load to be taken up is possible.

[0033] The sliding guide by means of the holding plates is located externally for two-spar frames or internally for three-spar or central-spar frames.

[0034] The invention will be explained in more detail below using an embodiment and with the aid of figures.

[0035] Here we show: Fig. 1 a perspective view of a stanchion bank with stanchions, retaining plates, sliding surfaces or sliding pieces as well as a screw connection for clamping the retaining plates; Fig. 2 a sectional view of a section of a central spar frame with laterally spaced subframes, the movable stanchion bank guided by the central spar, wherein the arrow symbolizes how the friction force can be adjusted with respect to the longitudinal displacement of the stanchion bank by specifying the torque of the screw connection; Fig. 3 a perspective view of the sliding guide, internal for a three-spar or central tube frame; Fig. 4 the representation of an external sliding guide for a two-spar frame with two pairs of holding plates, arranged on the underside of the support of the stanchion bank and Fig. 5 a schematic diagram of the longitudinal adjustment by performing a sliding movement of the stanchion bank on the frame in order to set the desired stanchion position, wherein the displacement can be carried out by tensile or compressive force by means of a crane, in particular a crane gripper, manual force or hydraulic cylinder while overcoming the friction force, but self-adhesion of the stanchion bank is nevertheless ensured when the respective desired position is reached.

[0036] The representations according to Fig. 1 shows a stanchion bank with partially broken stanchions 1, wherein the stanchion bank has a support 2, which, as can be seen from the Fig. 2, has an extension which is at least equal to the width of the longitudinal frame 3 with its beams 4 and 5.

[0037] Dirt wipers 6 are located on the front and / or back of the support 2. Sliding surfaces 7 are provided on the underside of the support 2, i.e., the side that rests on the beams 3, 4, and 5.

[0038] In addition, holding means in the form of a pair of holding plates 8; 9 are connected to the support. The holding plates 8; 9 extend substantially perpendicular to the underside of the support 2 and, for stability reasons, can engage around the sides of the support 2, which is preferably designed as a profile.

[0039] The retaining plates 8 and 9, in turn, feature sliding surfaces. In the example shown, these sliding surfaces consist of sliding pieces 10, for example, made of a highly resilient plastic material with self-lubricating properties.

[0040] The holding plates 8; 9 are clamped at their lower ends by means of corresponding screw-bolt connections 11.

[0041] The screw-bolt connections can accommodate sliding pieces, whereby these sliding pieces 12 also fulfil a wiping function.

[0042] The screw or bolt connections 11 may also have sleeve-shaped spacers 13 to guide the sliding pieces.

[0043] The representation according to Fig. 2 now shows a stanchion bank arranged on the central beam 3, guided by it, which is also supported on the adjacent beams 4 and 5. In principle, a design with a central beam frame with only one supporting central tube without additional support is also within the meaning of the invention.

[0044] The strength of the friction force required to move the stanchion bank can be adjusted and thus specified for the application using the torque of the screw or bolt connection 11.

[0045] A perspective view of the design of a movable stanchion bank on a three-spar or central tube frame with adjacent spars shows the Fig. 3.

[0046] The central beam 5, together with the pair of retaining plates 8; 9 and the screw or bolt connection 11, along with the lower sliding pieces 12, serves to guide the corresponding stanchion bank during its sliding operation. The adjacent beams 4 and 5 serve to support and absorb the forces of a load carried by the stanchions or the stanchion bank.

[0047] In the embodiment according to Fig. 4, the stanchion bank shown there again has a support 2, which, however, has two spaced-apart pairs of holding plates 8; 9.

[0048] The dimensions of the pairs of retaining plates, their distance from each other and the position of the screw or bolt connections correspond to the configuration according to the cross-section of the beams 14 and 15 of the two-beam frame according to Fig. 4.

[0049] With the help of the Fig. 5 will now illustrate the principle of the sliding guide and longitudinal adjustment of a stanchion bank with support 2, stanchions 1 and retaining plates or pair of retaining plates 8; 9.

[0050] The direction of the arrows under the exemplary beam 15 indicates the longitudinal displacement directions.

[0051] An example grab 16 of a crane not otherwise shown is shown in dashed lines. Using the grab 16, a force (direction of the dashed arrow) can be applied to the stanchion bank to achieve the desired sliding movement of the stanchion bank on the beam or frame.

[0052] Instead of a gripper 16, adjustment can also be carried out manually or by means of a hydraulic cylinder.

[0053] The effect of the respective sliding guides with the first to third sliding surfaces and the possibility of adjusting the preload via the screw or bolt connection ensures, on the one hand, the desired easy displacement of the corresponding stanchion bank, but on the other hand also secures the position then reached and prevents undesired displacement. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] EP 2 565 077 A1

[0002] DE 10235922 B4 [0004, 0007] WO 2023 / 234876 A1

[0008]

Claims

[1] A logging trailer for forestry and agricultural use, comprising a longitudinal frame (3, 4, 5; 14; 15) with axle support, axle and wheels, as well as stanchion banks that can be displaceably fixed to the frame for receiving stanchions (1) as lateral load supports, wherein the respective stanchion bank has holding means adapted to the cross-section of the frame, encompassing the latter, characterized byin that the longitudinal frame is designed as a multi-spar frame (14; 15) or central-spar frame (3, 4, 5) with or without laterally spaced auxiliary spars (4, 5), wherein the respective stanchion bank has a support (2) whose extent is at least equal to the width of the longitudinal frame (3) with its spars (4, 5; 14, 15), wherein the upper sides of the spars form a support surface for the underside of the support (2) and a first sliding surface is provided between these sides, furthermore the holding means each have a pair of holding plates (8; 9) which laterally engage around at least one of the spars (3), guided thereby, wherein a second sliding surface is formed between the holding plates (8; 9) and the respective surface side of the spar, the respective pairs of holding plates are clamped by means of a screw or bolt connection (11), and a third sliding surface is provided between the screw or bolt connection and the underside of the spar. [2] Stanchion bank according to claim 1, characterized by that the sliding surfaces (7; 10; 12) are designed as inserted or attached sliding pieces or applied sliding coatings or as sliding blocks. [3] Logging trailer according to claim 1 or 2, characterized by that dirt wipers (6) acting in the direction of the respective beam (3, 4, 5; 14; 15) are provided on the support (2). [4] Logging trailer according to one of the preceding claims, characterized by that the at least one third sliding surface, in particular designed as a sliding piece (12), has an additional function as a dirt deflector. [5] Logging trailer according to one of the preceding claims, characterized by that the friction force for the application-related displacement of the stanchion bank can be specified via the tensioning by means of the screw or bolt connection (11). [6] Logging trailer according to claim 5, characterized bythat by mechanically attacking the stake bank, it can be moved in the longitudinal direction. [7] Logging trailer according to claim 6, characterized by that the mechanical attack can be carried out by means of a crane, in particular a crane grab, by hand or with hydraulic support. [8] Logging trailer according to one of the preceding claims, characterized by that the distance between the stanchions (1) of each stanchion bank is adjustable. [9] Logging trailer according to one of the preceding claims, characterized by that the sliding guide is designed by means of the holding sides (8; 9) to be external for two-spar frames (14; 15) or internal for three-spar or central tube frames (3, 4, 5).

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