CN116216173A - Log conveying device - Google Patents

Abstract

The invention belongs to the technical field of wood processing, and particularly relates to a log conveying device, which comprises: a first conveyor for conveying logs moving in a first direction; a second conveyor for conveying logs moving in a second direction, the second direction being perpendicular to the first direction; a transfer mechanism for transferring the logs from the first conveyor to the second conveyor; the transfer mechanism includes: slide way, deflector rod and receiving mechanism; the log conveying device provided by the invention can keep a stable posture when the log is transferred between the two conveying mechanisms, realizes soft landing in the transfer process, avoids posture deflection of the log caused by free falling, is convenient for subsequent processing, can prevent the log from impacting equipment, and prolongs the service life of the equipment.

Description

Log conveying device

Technical Field

The invention belongs to the technical field of wood processing, and particularly relates to a log conveying device.

Background

The log is cut into boards or squares by the band saw before being made into wooden products such as furniture, the outline of the peripheral surface of the log is generally irregular, so that when the log is cut, a plane is cut on one side, then the plane is used as a reference to position the log, all cutting processes are generally finished on the same band saw in the prior art, and the log needs to be turned in place after the reference surface is cut, so that the reference surface is attached to the positioning surface, and the processing efficiency is affected. Therefore, the prior art is advanced in that the production line processing of the log is realized by a plurality of devices, the reference surface is cut by one band saw, then the log is conveyed to the downstream band saw by the conveying device for opening, in the conveying process, the conveying device can adjust the posture of the log to enable the reference surface to face to a fixed direction, however, the log has a throwing process in the transferring process of different conveying devices, particularly when the log is conveyed from transverse conveying to longitudinal conveying, the log falls freely from the upper conveying device to the lower conveying device, the posture of the log is possibly changed, the subsequent processing is influenced, and in addition, the service life of the device is also influenced by the impact on the device in the log falling process.

Disclosure of Invention

In view of the above-described drawbacks of the prior art, an object of the present invention is to provide a log conveying device capable of ensuring that the posture of the log remains unchanged during transfer of the log.

To achieve the above and other related objects, the present invention provides a log conveying apparatus comprising:

a first conveyor for conveying logs moving in a first direction;

a second conveyor for conveying logs moving in a second direction, the second direction being perpendicular to the first direction;

a transfer mechanism for transferring the logs from the first conveyor to the second conveyor;

the transfer mechanism includes:

the slideway is positioned at the discharge end of the first conveyor and is obliquely arranged downwards from the discharge end of the first conveyor;

the deflector rod is arranged at the discharge end of the first conveyor, is arranged in a swinging way along the axis of the second direction and is used for lifting logs at the discharge end of the first conveyor and sliding the logs onto the slideway along the deflector rod;

the receiving mechanism comprises a turning plate positioned at the lower end of the slideway, and a baffle wall which is arranged at one end of the slideway and is perpendicular to the turning plate, wherein the turning plate is arranged at one end of the slideway along the axis of the second direction in a swinging way, so that the turning plate can be switched between the following two stations:

the turning plate is in butt joint with the lower end of the slideway and is parallel to the slideway; and

the second station is used for disconnecting the turning plate from the lower end of the slideway and is in a horizontal state;

the second conveyor is movably arranged along the vertical direction, so that the second conveyor can lift up the log on the turning plate in the second station state.

In an alternative embodiment of the invention, the material receiving mechanism is mounted on a frame, and an elastic damping element is arranged between the turning plate and the frame, and the elastic damping element is configured such that the elastic force of the elastic damping element can drive the turning plate to move from the working position to the working position.

In an alternative embodiment of the invention, a locking mechanism is arranged between the receiving mechanism and the frame, and the locking mechanism is assembled to prevent the turning plate from moving to the second station when the turning plate is positioned at the first station, and unlock the locking mechanism when the log collides with the blocking wall, so that the turning plate can turn to the second station under the action of gravity of the log.

In an alternative embodiment of the invention, a fixed shaft is arranged on the frame, the turning plate is rotatably connected with the fixed shaft, the locking mechanism comprises a locking pin which is arranged on the blocking wall and stretches out and draws back along the radial direction of the fixed shaft, a limiting hole matched with the locking pin is arranged on the fixed shaft, a first elastic element is arranged between the locking pin and the blocking wall, the first elastic element is configured to drive the locking pin to move towards the center direction of the fixed shaft through elasticity, when the turning plate is positioned at the station, the locking pin is aligned with the limiting hole, at the moment, the locking pin can be inserted into the limiting hole under the action of the first elastic element, a transmission mechanism is arranged between the locking pin and the blocking wall, and the transmission mechanism is configured to drive the locking pin to be pulled out of the limiting hole through the transmission mechanism when the locking pin is in collision with the blocking wall.

In an alternative embodiment of the invention, the transmission mechanism comprises a lever hinged with the blocking wall and a groove plate fixedly connected with the locking pin, a first end of the lever protrudes out of the surface of the blocking wall, a second end of the lever is provided with a guide pin, a waist-shaped hole in sliding fit with the guide pin is formed in the groove plate, and when the first end of the lever is extruded by a log, the second end of the lever can be tilted up to drive the locking pin to be pulled out of the limiting hole.

In an alternative embodiment of the invention, a linkage retaining mechanism is arranged between the second conveyor and the receiving mechanism, and the linkage retaining mechanism is assembled so that the flap can be retained at the second station during upward movement of the second conveyor and lifting of the logs.

In an alternative embodiment of the present invention, the linkage maintaining mechanism includes a bracket installed on the second lifter, the bracket is disposed to protrude upward, a roller is disposed at a top end of the bracket, and when the second conveyor ascends, the roller can collide with a side of the blocking wall away from the turning plate, so as to prevent the turning plate from turning toward the first station.

In an alternative embodiment of the present invention, the second conveyor is a roller conveyor, including a lifting frame, and a roller mounted to the lifting frame, the roller being in driving connection with the first driving element.

In an alternative embodiment of the invention, the bottom of the lifting frame is connected with the stand through a screw lifter, and a second driving element for driving the screw lifter to move is arranged on the stand.

In an alternative embodiment of the invention, the first conveyor is a track conveyor.

The invention has the technical effects that: the log conveying device provided by the invention can keep a stable posture when the log is transferred between the two conveying mechanisms, realizes soft landing in the transfer process, avoids posture deflection of the log caused by free falling, is convenient for subsequent processing, can prevent the log from impacting equipment, and prolongs the service life of the equipment.

Drawings

Figure 1 is a schematic diagram of a log transportation device provided by an embodiment of the present invention;

FIG. 2 is a perspective view of a second conveyor and receiving mechanism provided by an embodiment of the present invention;

FIG. 3 is a perspective view of a second conveyor and receiving mechanism from another perspective provided by an embodiment of the present invention;

FIG. 4 is an enlarged partial view of I of FIG. 3;

FIG. 5 is a side view of a second conveyor and receiving structure provided by an embodiment of the invention;

FIG. 6 is a cross-sectional view A-A of FIG. 5;

fig. 7 is an enlarged view of part II of fig. 6;

FIG. 8 is a B-B cross-sectional view of FIG. 5;

reference numerals: 1. a log; 100. a frame; 101. a screw rod lifter; 102. a second driving element; 10. a first conveyor; 20. a second conveyor; 21. a lifting frame; 22. a roller; 23. a first driving element; 24. a bracket; 25. a roller; 30. a transfer mechanism; 301. a deflector rod; 302. a slideway; 31. turning plate; 32. a retaining wall; 33. an elastic damping element; 34. a fixed shaft; 341. a limiting hole; 35. a locking pin; 351. a trough plate; 352. a waist-shaped hole; 36. a first elastic element; 37. a lever; 371. guide pins.

Description of the embodiments

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

Referring to fig. 1-8, the log conveying device provided by the invention can keep a stable posture when a log 1 is transferred between two conveying mechanisms, realize soft landing in a transferring process, avoid posture deflection of the log 1 caused by free falling, facilitate subsequent processing, and simultaneously avoid impact of the log 1 on equipment and prolong the service life of the equipment.

Referring to fig. 1, the log conveying apparatus of the present invention includes a first conveyor 10, a second conveyor 20, and a transfer mechanism 30; the first conveyor 10 is for conveying logs 1 in a first direction; the second conveyor 20 is for conveying logs 1 in a second direction, which is perpendicular to the first direction; a transfer mechanism 30 for transferring the logs 1 from the first conveyor 10 to the second conveyor 20; the transfer mechanism 30 comprises a slideway 302, a deflector rod 301 and a receiving mechanism; the slideway 302 is located at the discharge end of the first conveyor 10, and the slideway 302 is arranged obliquely downwards from the discharge end of the first conveyor 10; the deflector rod 301 is installed at the discharge end of the first conveyor 10, and the deflector rod 301 is arranged in a swinging manner along the axis of the second direction and is used for lifting the log 1 at the discharge end of the first conveyor 10 and sliding onto the slideway 302 along the deflector rod 301; the receiving mechanism comprises a turning plate 31 positioned at the lower end of the slideway 302, and a baffle wall 32 which is arranged at one end of the turning plate 31 and is perpendicular to the turning plate 31, wherein the baffle wall 32 is far away from one end of the slideway 302, and the turning plate 31 is arranged at one end of the slideway 302 along the axis in a swinging manner in a second direction, so that the turning plate 31 can be switched between the following two stations: the first station, the turning plate 31 is in butt joint with the lower end of the slideway 302 and is parallel to the slideway 302; and a second station, wherein the turning plate 31 is disconnected from the lower end of the slideway 302 and is in a horizontal state; the second conveyor 20 is movably arranged along the vertical direction, so that the second conveyor 20 can lift the log 1 on the turning plate 31 in the second station state.

Based on the above log conveying device, when the log 1 reaches the end of the first conveyor 10, the shift lever 301 lifts the log 1, so that the log 1 slides onto the slide rail 302 along the shift lever 301, slides onto the turning plate 31 along the slide rail 302, then turns the turning plate 31 downward to a horizontal state, and finally the second conveyor 20 lifts up to lift the log 1 and drive the log 1 to move downstream, it should be understood that the log 1 does not leave the supporting surface during the whole transferring process, and in the preferred embodiment, the cut reference surface of the log 1 is always attached to the supporting surface, so that the log 1 can be effectively prevented from turning during the transferring process, and the log 1 is ensured to fall on the second conveyor 20 in the same posture as that of the log on the first conveyor 10, thereby facilitating the subsequent positioning and processing.

Referring to fig. 2 and 6, in an alternative embodiment of the present invention, the receiving mechanism is mounted on a frame 100, and an elastic damping element 33 is disposed between the flap 31 and the frame 100, where the elastic damping element 33 is configured such that the elastic force of the elastic damping element can drive the flap 31 to move from the station to the station. It should be appreciated that the elastic damping element 33 enables the flap 31 to be smoothly turned to a horizontal state under the gravity of the raw wood 1, and the flap 31 does not need to be provided with a special driving element, thereby reducing the equipment cost, and simultaneously avoiding the flap 31 from falling down rapidly under the gravity of the raw wood 1 and avoiding collision; in addition, after the logs 1 are removed from the second conveyor 20, the flap 31 can be reset to the first station by means of the elastic damping element 33 for receiving the next log 1, which elastic damping element 33 in the preferred embodiment may be a viscous damper, for example.

Referring to fig. 6 and 7, in an alternative embodiment of the present invention, a locking mechanism is disposed between the receiving mechanism and the frame 100, where the locking mechanism is configured to prevent the flap 31 from moving toward the second station when the flap 31 is located at the first station, and unlock the locking mechanism when the log 1 collides with the blocking wall 32, so that the flap 31 can be turned to the second station under the action of gravity of the log 1. Specifically, as shown in fig. 7, the frame 100 is provided with a fixed shaft 34, the turning plate 31 is rotatably connected with the fixed shaft 34, the locking mechanism includes a locking pin 35 that is disposed on the blocking wall 32 and stretches out and draws back along a radial direction of the fixed shaft 34, a limiting hole 341 that is matched with the locking pin 35 is disposed on the fixed shaft 34, a first elastic element 36 is disposed between the locking pin 35 and the blocking wall 32, the first elastic element 36 is configured such that an elastic force of the first elastic element can drive the locking pin 35 to move toward a center direction of the fixed shaft 34, when the turning plate 31 is in the working position, the locking pin 35 is aligned with the limiting hole 341, at this time, the locking pin 35 can be inserted into the limiting hole 341 under the action of the first elastic element 36, a transmission mechanism is disposed between the locking pin 35 and the blocking wall 32, and the transmission mechanism is configured such that when the log 1 collides with the blocking wall 32, the locking pin 35 can be driven to withdraw from the limiting hole 341 through the transmission mechanism. Specifically, as shown in fig. 4, the transmission mechanism includes a lever 37 hinged to the blocking wall 32, and a slot plate 351 fixedly connected to the locking pin 35, a first end of the lever 37 protrudes from a surface of the blocking wall 32, a guide pin 371 is disposed at a second end of the lever 37, a waist-shaped hole 352 slidably matched with the guide pin 371 is disposed on the slot plate 351, and when the first end of the lever 37 is extruded by the log 1, the second end of the lever 37 is tilted to drive the locking pin 35 to be pulled out from the limiting hole 341.

It will be appreciated that the locking mechanism can hold the flap 31 in the first position before the log 1 has completely entered the flap 31, avoiding the flap 31 from falling off as soon as the log 1 contacts the flap 31, which can result in an unexpected turn-over of the log 1.

Referring to fig. 5 and 8, in an alternative embodiment of the present invention, a linkage retaining mechanism is provided between the second conveyor 20 and the receiving mechanism, and the linkage retaining mechanism is configured to retain the flap 31 at the second station when the second conveyor 20 moves upward and lifts the log 1. Specifically, as shown in fig. 8, the linkage maintaining mechanism includes a bracket 24 mounted on the second lifter, the bracket 24 is disposed to protrude upward, a roller 25 is disposed at a top end of the bracket 24, and when the second conveyor 20 ascends, the roller 25 can abut against a side of the blocking wall 32 away from the turning plate 31, so as to prevent the turning plate 31 from turning toward the first station. It will be appreciated that when the second conveyor 20 lifts the logs 1, it is undesirable for the flap 31 to reset immediately, as this can cause interference with the conveyance of the logs 1 by the flap 31, and therefore the invention provides a linked retaining mechanism that allows the second conveyor 20 to restrain the flap 31 in the raised condition at station two, avoiding interference with the conveyance of the logs 1 by the flap 31.

Referring to fig. 1, in an alternative embodiment of the present invention, the second conveyor 20 is a roller conveyor, and includes a lifting frame 21, and a roller 22 mounted on the lifting frame 21, where the roller 22 is in driving connection with a first driving element 23, further, the bottom of the lifting frame 21 is connected with a frame 100 through a screw lifter 101, and a second driving element 102 for driving the screw lifter 101 to move is provided on the frame 100; preferably, the first conveyor 10 is a track conveyor.

In summary, the log conveying device provided by the invention can keep a stable posture when the log 1 is transferred between two conveying mechanisms, realize soft landing in the transfer process, avoid posture deflection of the log 1 caused by free falling, facilitate subsequent processing, and simultaneously avoid impact of the log 1 on equipment and prolong the service life of the equipment; the elastic damping element 33 can enable the turning plate 31 to smoothly turn to a horizontal state under the action of the gravity of the log 1, the turning plate 31 does not need to be provided with a special driving element, the equipment cost is reduced, meanwhile, the turning plate 31 is prevented from falling down rapidly under the action of the gravity of the log 1, and the impact is prevented; the locking mechanism can keep the turning plate 31 at the first station before the log 1 completely enters the turning plate 31, so that the turning plate 31 is prevented from falling when the log 1 just contacts the turning plate 31; the linkage retaining mechanism enables the second conveyor 20 to limit the turning plate 31 to the second station in the lifting state, and avoids interference of the turning plate 31 on conveying of the log 1.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

In the description herein, numerous specific details are provided, such as examples of components and/or methods, to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that an embodiment of the invention can be practiced without one or more of the specific details, or with other apparatus, systems, components, methods, components, materials, parts, and so forth. In other instances, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

Reference throughout this specification to "one embodiment," "an embodiment," or "a particular embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment, and not necessarily all embodiments, of the present invention. Thus, the appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined in any suitable manner with one or more other embodiments. It will be appreciated that other variations and modifications of the embodiments of the invention described and illustrated herein are possible in light of the teachings herein and are to be considered as part of the spirit and scope of the invention.

It will also be appreciated that one or more of the elements shown in the figures may also be implemented in a more separated or integrated manner, or even removed because of inoperability in certain circumstances or provided because it may be useful depending on the particular application.

In addition, any labeled arrows in the drawings/figures should be considered only as exemplary, and not limiting, unless otherwise specifically indicated. Furthermore, the term "or" as used herein is generally intended to mean "and/or" unless specified otherwise. Combinations of parts or steps will also be considered as being noted where terminology is foreseen as rendering the ability to separate or combine is unclear.

As used in the description herein and throughout the claims that follow, unless otherwise indicated, "a", "an", and "the" include plural references. Also, as used in the description herein and throughout the claims that follow, unless otherwise indicated, the meaning of "in …" includes "in …" and "on …".

The above description of illustrated embodiments of the invention, including what is described in the abstract, is not intended to be exhaustive or to limit the invention to the precise forms disclosed herein. Although specific embodiments of, and examples for, the invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention, as those skilled in the relevant art will recognize and appreciate. As noted, these modifications can be made to the present invention in light of the foregoing description of illustrated embodiments of the present invention and are to be included within the spirit and scope of the present invention.

The systems and methods have been described herein in general terms as being helpful in understanding the details of the present invention. Furthermore, various specific details have been set forth in order to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that an embodiment of the invention can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, and/or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

Thus, although the invention has been described herein with reference to particular embodiments thereof, a latitude of modification, various changes and substitutions are intended in the foregoing disclosures, and it will be appreciated that in some instances some features of the invention will be employed without a corresponding use of other features without departing from the scope and spirit of the invention as set forth. Therefore, many modifications may be made to adapt a particular situation or material to the essential scope and spirit of the present invention. It is intended that the invention not be limited to the particular terms used in following claims and/or to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the invention should be determined only by the following claims.

Claims (10)

1. A log transportation device, comprising:

a first conveyor (10) for conveying logs (1) moving in a first direction;

a second conveyor (20) for conveying logs (1) moving in a second direction, said second direction being perpendicular to said first direction;

-a transfer mechanism (30) for transferring the logs (1) from the first conveyor (10) to the second conveyor (20);

the transfer mechanism (30) includes:

the slideway (302) is positioned at the discharge end of the first conveyor (10), and the slideway (302) is obliquely arranged downwards from the discharge end of the first conveyor (10);

the deflector rod (301) is arranged at the discharge end of the first conveyor (10), and the deflector rod (301) is arranged in a swinging mode along the axis of the second direction and is used for lifting logs (1) at the discharge end of the first conveyor (10) and sliding onto the slideway (302) along the deflector rod (301);

the receiving mechanism comprises a turning plate (31) positioned at the lower end of the slideway (302), and a baffle wall (32) which is arranged at one end of the turning plate (31) and is perpendicular to the turning plate (31), wherein the baffle wall is far away from one end of the slideway (302), and the turning plate (31) is arranged at one end of the slideway (302) along the axis of a second direction in a swinging way, so that the turning plate (31) can be switched between the following two stations:

the turning plate (31) is in butt joint with the lower end of the slideway (302) and is parallel to the slideway (302); and

the second station is characterized in that the turning plate (31) is disconnected with the lower end of the slideway (302) and is in a horizontal state;

the second conveyor (20) is movably arranged along the vertical direction, so that the second conveyor (20) can lift the log (1) on the turning plate (31) in the station two state.

2. Log transportation device according to claim 1, characterized in that the receiving means is mounted to a frame (100), that an elastic damping element (33) is arranged between the flap (31) and the frame (100), and that the elastic damping element (33) is configured such that its elastic force can drive the flap (31) to move from the station to the station.

3. Log conveying device according to claim 2, characterized in that a locking mechanism is provided between the receiving means and the frame (100), which locking mechanism is fitted such that when the flap (31) is in the station one, the flap (31) is prevented from moving towards the station two, and that when the log (1) collides with the blocking wall (32) the locking mechanism is unlocked, so that the flap (31) can be turned over to the station two under the action of the weight of the log (1).

4. A log conveying device according to claim 3, characterized in that the frame (100) is provided with a fixed shaft (34), the flap (31) is rotatably connected with the fixed shaft (34), the locking mechanism comprises a locking pin (35) which is arranged on the retaining wall (32) in a telescopic manner along the radial direction of the fixed shaft (34), the fixed shaft (34) is provided with a limiting hole (341) which is matched with the locking pin (35), a first elastic element (36) is arranged between the locking pin (35) and the retaining wall (32), the first elastic element (36) is configured such that the elastic force can drive the locking pin (35) to move towards the center direction of the fixed shaft (34), when the flap (31) is positioned at the station, the locking pin (35) is aligned with the limiting hole (341), at the moment, the locking pin (35) can be inserted into the limiting hole (341) under the action of the first elastic element (36), and when the locking pin (35) and the retaining wall (32) are arranged in a manner that the locking pin (35) can be abutted against the transmission mechanism (32) from the transmission mechanism (1).

5. A log transportation device as claimed in claim 4, characterized in that the transmission mechanism comprises a lever (37) hinged with the baffle wall (32) and a groove plate (351) fixedly connected with the locking pin (35), a first end of the lever (37) protrudes out of the surface of the baffle wall (32), a guide pin (371) is arranged at a second end of the lever (37), a waist-shaped hole (352) in sliding fit with the guide pin (371) is arranged on the groove plate (351), and when the first end of the lever (37) is extruded by the log (1), the second end of the lever (37) can be lifted up to drive the locking pin (35) to be pulled out of the limit hole (341).

6. Log conveying device according to claim 1, characterized in that a linkage retaining mechanism is provided between the second conveyor (20) and the receiving mechanism, which linkage retaining mechanism is arranged to retain the flap (31) in the second station when the second conveyor (20) is moved upwards and lifts up the log (1).

7. The log conveying apparatus as claimed in claim 6, characterized in that the linkage holding mechanism comprises a bracket (24) mounted to the second lifter, the bracket (24) is provided with a roller (25) protruding upward, and when the second lifter (20) is lifted, the roller (25) can abut against a side of the blocking wall (32) away from the flap (31) to prevent the flap (31) from turning toward the station one.

8. Log conveying device according to claim 1, characterized in that the second conveyor (20) is a roller conveyor comprising a lifting frame (21) and a roller (22) mounted to the lifting frame (21), which roller (22) is in driving connection with a first driving element (23).

9. Log conveying device according to claim 8, characterized in that the bottom of the lifting frame (21) is connected to the frame (100) by means of a screw lift (101), which frame (100) is provided with a second drive element (102) for driving the movement of the screw lift (101).

10. Log conveying device according to claim 1, characterized in that the first conveyor (10) is a crawler conveyor.

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