JP2023006199A - tree processor - Google Patents

Abstract

To suppresses the loss of power to drive a material feeding section, while suppressing noise and chain oil consumption by reducing the frictional force of a moving part of a crawler chain.SOLUTION: A material feeding unit 30 of a tree processor 100 has: a drive sprocket 32 and a driven sprocket 33 supported by a frame 31; a drive source 34 for driving the drive sprocket 32; and an endless crawler chain 35 that is wound around the drive sprocket 32 and the driven sprocket 33, the crawler chain 35 having: a plurality of crawler links 36; a shaft 364 connecting adjacent crawler links 36; a roller 367 fitted outside of the shaft 364 and engaging the drive sprocket 32 and the driven sprocket 33; and a bearing 366 arranged between the shaft 364 and the roller 367, and the bearing 366 being formed of synthetic resin.SELECTED DRAWING: Figure 9

Description

Application for application of Article 30, paragraph 2 of the Patent Law (1) Kokusai Nogyousha Co., Ltd., Rural News Newspaper, Weekly Page 8, dated October 19, 2020 (2) Forestry Mechanization Association, Mechanized Forestry, Ordinance Back cover of the April 15, 1999 issue (3) Iwafuji Industry Co., Ltd. Harvester GPH-45A Catalog

TECHNICAL FIELD The present invention relates to a tree processing device for tree construction work.

Conventionally, tree processing devices called harvesters or processors have been proposed (see, for example, Patent Document 1). A tree processing device is attached to a working arm provided on a base machine such as a hydraulic excavator and used for tree construction work. Among the tree processing devices, in the timber construction work using a processor, the delimbing work of felled trees and the cutting work of cutting the delimbed trees (timber) into arbitrary lengths to form logs are performed in succession. is done. In timber construction work using a harvester, standing tree felling work can also be performed.

A tree processing apparatus mainly has a gripping section, a feeding section, a length measuring section, a branching section, and a cutting section. The grasping unit grasps trees by pressing a plurality of material feeding units against trees that are objects of construction work. The material feeding unit feeds the tree in the material length direction by driving the crawler chain while being pressed against the tree.

The length measuring unit measures (measures) the length of the delivered tree (timber), that is, the length of the timber. The length of the material is measured by the length measuring unit, and the material feeding unit stops feeding the material when the material is fed up to the preset length.

The delimbing unit performs delimbing by bringing the cutter into contact with the branch of the tree vigorously sent out by the feeding unit. The cutting section cuts the delivered tree (timber) to a set length to form a log of a desired length.

JP-A-2000-157075

However, since the crawler chain is driven to run while the crawler chain is pressed against the tree, a large load is applied to the movable part of the crawler chain and the part where the crawler chain slides, creating a strong frictional force. rice field.

This frictional force causes a loss of power for driving the material feeding section and causes noise generated from the material feeding section. Also, the amount of chain oil that is supplied to reduce the frictional force is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the frictional force of the movable portion of the crawler chain, thereby suppressing the loss of power for driving the material feeding portion, as well as suppressing noise and chain oil consumption. is to provide

The tree processing device of the present invention is
A tree processing device including a plurality of feeding units for feeding a gripped tree in the length direction,
The material feeding unit
a frame;
a driving sprocket and a driven sprocket supported by the frame;
a drive source for driving the drive sprocket;
an endless crawler chain that is wound around the driving sprocket and the driven sprocket;
The crawler chain is
multiple crawler links;
a shaft connecting adjacent crawler links;
a roller fitted over the shaft and engaging the driving sprocket and the driven sprocket;
a bearing disposed between the shaft and the roller;
The bearing is made of synthetic resin.

According to the tree processing apparatus of the present invention, it is possible to suppress the loss of power for driving the material feeding unit, and it is possible to suppress the noise and consumption of chain oil.

FIG. 1 is a side view of a base machine to which a tree processing device according to Embodiment 1 is attached. FIG. 2 is a side view of the tree processing device. FIG. 3 is a top view of the tree treatment device. FIG. 4 is a diagram showing a state in which felling timber work is performed by the tree processing apparatus. FIG. 5 is a diagram showing a state in which a tree processing device performs tree construction work. FIG. 6 is a plan view showing a state in which tree construction work is performed by the tree processing system. FIG. 7 is a diagram showing a schematic configuration of a hydraulic circuit of the tree processing device. FIG. 8 is a front view of the material feeding section. 9 is a cross-sectional view taken along the line A--A of FIG. 8. FIG. 10 is a cross-sectional view taken along line BB of FIG. 8. FIG. FIG. 11 is a diagram showing part of the crawler chain. 12 is a cross-sectional view taken along line CC of FIG. 11. FIG. 13 is a cross-sectional view taken along line DD of FIG. 11. FIG.

A tree processing apparatus according to an embodiment of the present invention includes:
A tree processing device including a plurality of feeding units for feeding a gripped tree in the length direction,
The material feeding unit
a frame;
a driving sprocket and a driven sprocket supported by the frame;
a drive source for driving the drive sprocket;
an endless crawler chain that is wound around the driving sprocket and the driven sprocket;
The crawler chain is
multiple crawler links;
a shaft connecting adjacent crawler links;
a roller fitted over the shaft and engaging the driving sprocket and the driven sprocket;
a bearing disposed between the shaft and the roller;
The bearing is made of synthetic resin (first configuration).

According to the above configuration, a synthetic resin bearing is arranged between the shaft that connects the crawler links and the roller that is fitted to the outside of the shaft.
As a result, it is possible to reduce the frictional force of the movable part of the crawler chain, which is generated when the crawler chain is driven while pushing it against the trees, and it is possible to suppress the loss of power for driving the material feeding part, as well as noise and chain oil. consumption can be suppressed.

In the first configuration, the frame includes:
A slide rail may be arranged along the running direction of the crawler chain so that the roller contacts while rolling (second configuration).

According to the above configuration, the material feeding section has the slide rail with which the roller contacts while rolling.
Therefore, it is possible to reduce the frictional force generated in the portion where the rollers of the crawler chain rotate and contact, suppress the loss of power for driving the material feed section, and suppress noise and chain oil consumption. can.

In the first or second configuration, the crawler link includes:
A shaft holding portion through which the shaft is inserted is provided,
The frame includes
A slider may be arranged along the traveling direction of the crawler chain so as to be in sliding contact with the shaft holding portion (third configuration).

According to the above configuration, the material feeding section has the slider that is in sliding contact with the shaft holding section.
As a result, the load generated when the crawler chain is pressed against the tree can be distributed not only to the rollers but also to the shaft holding portion, reducing the pressure applied to the rollers and reducing the wear of the rollers. can.

[Embodiment 1]
Hereinafter, the tree processing device 100 according to Embodiment 1 of the present invention will be described in detail with reference to the drawings.

The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated. In addition, in order to make the description easier to understand, in the drawings referred to below, the configuration is shown in a simplified or schematic form, or some constituent members are omitted. Also, the dimensional ratios between the constituent members shown in each drawing do not necessarily indicate the actual dimensional ratios. In the figure, arrow F indicates the front and arrow B indicates the rear. Arrow L points to the left and arrow R points to the right. Arrow U points upward and arrow D points downward.

In this specification, a standing tree or a tree with branches (whole lumber) that has been cut down is referred to as a tree W, a whole trunk member whose limbs have been removed is referred to as a lumber W, and a log that has been cut into pieces is referred to as a log WL. However, they may be referred to as trees W or lumber W without distinguishing between them.

[overall structure]
FIG. 1 is a side view of a base machine 200 to which a tree processing device 100 according to Embodiment 1 is attached. As shown in FIG. 1, a tree processing system 300 is configured by attaching the tree processing device 100 to a base machine 200 .

The base machine 200 is a hydraulic excavator and includes a lower running body 110 , an upper revolving body 120 , a working arm 130 and an operator's cab 150 . Note that the base machine is not limited to a hydraulic excavator. For example, a wheeled base machine may be used.

The undercarriage 110 has a track drive 112 . The crawler track device 112 is a device for running by circulating crawler belts with drive wheels.

The upper revolving body 120 is rotatably supported with respect to the lower traveling body 110 . The upper revolving structure 120 is driven to revolve with respect to the lower traveling structure 110 by a revolving device 114 having a hydraulic actuator.

The working arm 130 is a multi-joint arm that extends from the upper revolving body 120 and performs bending and extending operations. A tree processing device 100 is attached to the tip. The work arm 130 operates under hydraulic control to change the direction and position of the tree treatment device 100 . The work arm 130 has a boom 131 , an arm 133 and a tip arm 135 of the tree treatment device 100 .

The boom 131 is supported on the front side of the upper rotating body 120 so as to be able to rise and fall. The boom 131 can be raised and lowered by a boom cylinder 141, which is a hydraulic actuator.

The arm 133 is connected to the tip of the boom 131 so as to be vertically swingable. Arm 133 is swingable by arm cylinder 143, which is a hydraulic actuator.

The tip arm 135 of the tree processing apparatus 100 is connected to the tip of the arm 133 so as to be vertically swingable. The tip arm 135 is connected to a first support pin 136 at the tip of the arm 133 and a second support pin 137 provided at one end of a link member 138 . The other end of link member 138 is connected to the tip of arm 133 . A tip of a bucket cylinder 145 is connected to the link member 138 .

Boom 131 , arm 133 and tip arm 135 can be raised and lowered by boom cylinder 141 , arm cylinder 143 and bucket cylinder 145 . The boom 131 , the arm 133 , and the tip arm 135 are turned by turning the upper turning body 120 with the turning device 114 .

The operator's cab 150 is provided in the upper revolving body 120 . The operator rides in the operator's cab 150 and operates the operation devices in the operator's cab 150 to perform traveling operation of the lower traveling body 110, turning operation of the upper revolving body 120, driving operation of the work arm 130, and tree processing. The device 100 is operated and the like.

The tree processing device 100 is a harvester, and is a device that holds and fells a tree W that is a standing tree, and performs tree construction work while sending the tree W in the length direction. The tree processing apparatus 100 also has a branching function for cutting the branches of the tree W and a cutting function for cutting the tree W to a predetermined length. A control unit 60 that controls driving of the tree processing apparatus 100 is arranged in the driver's cab 150 of the base machine 200 .

FIG. 2 is a side view of the tree processing apparatus 100. FIG. FIG. 3 is a top view of the tree processing apparatus 100. FIG. As shown in FIGS. 2 and 3, the tree processing apparatus 100 includes a tree processing apparatus main body 11, a gripping section 20, a tilt section 25, a material feeding section 30, a length measuring section 38 (see FIG. 8), a branching section 40, It has a cutting section 45 and a control section 60 .

The tree processing device main body 11 is a part forming the base of the tree processing device 100 . The tree processing apparatus main body 11 is attached to the tip arm 135 via the tilt arm 27 of the tilt section 25 and the rotator 13 .

The gripping portion 20 is a portion that opens and closes the plurality of feeding portions 30 to grip or release the tree W. As shown in FIG. The grip part 20 has an opening/closing mechanism 21 . The opening/closing mechanism 21 is operated by an opening/closing hydraulic cylinder 23 (see FIG. 7) to open and close the plurality of feeding parts 30 to grip or release the tree W. As shown in FIG.

The tilt part 25 is a part for switching the attitude of the tree processing device 100 in order to cut down the standing tree W and grip the tree W. As shown in FIG. The tilt section 25 has a tilt arm 27 . The tree processing apparatus main body 11 is attached to the tilt arm 27 so as to be able to be raised and lowered. The tilting part 25 is operated by a tilting hydraulic cylinder 28 (see FIGS. 5 and 7) to raise and lower the tree processing apparatus main body 11 with respect to the tilting arm 27 . The tree processing apparatus main body 11 can be switched between a first posture P1 directed vertically (see FIG. 4a) and a second posture P2 directed horizontally (see FIGS. 2 and 4). 4b).

The material feeding unit 30 is a part for feeding the gripped tree W in the material length direction. In this embodiment, two material feeding units 30 are provided. As shown in FIG. 3, the two feeding units 30 are provided in the opening/closing mechanism 21 of the gripping unit 20 so as to face each other. The material feed section 30 has a frame 31 , a material feed drive motor 34 , and a crawler chain 35 .

The frame 31 is attached to the opening/closing mechanism 21 . The crawler chain 35 is wound around the drive sprocket 32 and the driven sprocket 33 (see FIG. 9) supported by the frame 31 . The material feeding drive motor 34 causes the crawler chain 35 to run by rotationally driving the drive sprocket 32 . The tree W is grasped by pressing the two feeding units 30 against the tree W, and the two crawler chains 35 are driven to travel in the same direction, thereby feeding the grasped tree W in the material length direction. can.

The interval between the two material feeding units 30 can be changed. When feeding the tree W, the diameter of the tree W changes depending on the position of the tree W, so the distance between the feeding parts 30 changes according to the size of the diameter of the tree W depending on the hydraulic pressure. In addition, when the diameter of the tree W increases and a force acts to spread the material feeder 30, the material feeder 30 can open outward against the hydraulic force of the opening/closing mechanism 21. .

The length measuring unit 38 is attached to the material feeding unit 30 (see FIG. 8) and measures the amount of the tree W to be fed. The length measuring section 38 has an encoder 39 . The length measuring unit 38 detects the travel distance of the crawler chain 35 by detecting the rotation of the drive sprocket 32 (the material feed drive motor 34 ) with the encoder 39 .

The delimbing unit 40 delimbs the tree W delivered by the lumber feeding unit 30 . The branching section 40 has an opening/closing body 41 and a cutter 43 . The openable/closable body 41 can be opened and closed, and is arranged so as to surround the outer peripheral surface of the tree W gripped by the gripper 20 in the closed state. The opening/closing body 41 is operated by an opening/closing body hydraulic cylinder 42 (see FIG. 7). The cutter 43 is attached to one side of the opening/closing body 41 . The cutter 43 slides on the surface of the tree W delivered by the material delivery unit 30 and cuts the branches of the tree W. As shown in FIG. The opening/closing body 41 may be opened/closed in response to a control signal input from the control section 60 or may be operated in conjunction with the grip section 20 .

The cutting part 45 is a part that cuts the material W sent by the material sending part 30 to a predetermined length and cuts the material into pieces. The cutting section 45 is provided at the end of the material feeding section 30 opposite to the branching section 40 . The cutting part 45 has a saw 46 (see FIG. 5). The cutting unit 45 performs a cutting operation by driving the cutting saw 46 in response to a control signal input from the control unit 60 .

FIG. 4 is a diagram showing a state in which the tree processing apparatus 100 performs felling lumber work. FIG. 4a shows a state in which a standing tree W is felled by the tree processing apparatus 100. FIG. FIG. 4b shows a state in which the tree processing apparatus 100 delimbs the tree W while feeding it in the direction D1.

As shown in FIG. 4a, when a standing tree W is felled by the tree processing apparatus 100, the tilting unit 25 is operated to bring the tree processing apparatus main body 11 into a first posture P1 directed vertically. In the first posture P1, the delimbing part 40 faces upward and the cutting part 45 faces downward. While maintaining this first posture P1, the gripping unit 20 is operated to grip the vicinity of the root of the tree W with the two feeding units 30, and in this state, the saw 46 of the cutting unit 45 is operated to grip the root of the tree W. disconnect.

Subsequently, as shown in FIG. 4b, while the cut tree W is held by the two feeding units 30, the tilt unit 25 is operated to orient the tree processing apparatus main body 11 in the horizontal direction. Switch to 2-posture P2. As a result, the standing tree W can be felled by the tree processing device 100 .

After the standing tree W is felled by the tree processing device 100, the crawler chains 35 of the two feeding units 30 are driven and run in the same direction to feed the tree W in the direction D1. At this time, the cutter 43 of the limbing section 40 is brought into sliding contact with the surface of the tree W delivered by the material feeding section 30 to cut the branches of the tree W. As shown in FIG.

In this embodiment, the length measuring units 38 (encoders 39) (see FIG. 8) provided in the two feeding units 30 respectively detect the amount of movement of the delivered trees W, and the detection signals from the encoders 39 are detected. , the length from the cut end WP of the tree W to the cut portion 45 is measured (measured). Then, when the material W is delivered to a preset length, the material feeding unit 30 is stopped, and the material W is cut by the cutting unit 45 to form a log WL of a desired length.

FIG. 5 is a diagram showing a state in which the tree processing apparatus 100 performs tree construction work. FIG. 5 shows a state in which the material W is cut by the cutting portion 45 . The cutting section 45 has a cutting saw 46, a cutting saw drive motor 47 (see FIG. 7), and a cutting saw hydraulic cylinder 48 (see FIG. 7).

The cutting saw 46 is a chainsaw and has a saw bar 461 and a saw chain 463 . The saw bar 461 is a plate-like member that guides the saw chain 463 . The saw bar 461 is swingably supported by a support shaft 465 . The saw chain 463 is wound around the saw bar 461 and a sprocket (not shown). A cutting saw drive motor 47 (see FIG. 7) is connected to the sprocket. The cut saw drive motor 47 is a hydraulic motor. When the cutting saw drive motor 47 is rotated by the hydraulic oil, the saw chain 463 is rotationally driven to perform the cutting operation.

The cutting saw hydraulic cylinder 48 (see FIG. 7) is an actuator that causes the cutting saw 46 to swing forward and backward in the radial direction of the material W. As shown in FIG. When the hydraulic cylinder 48 for cutting saw is expanded and contracted by hydraulic oil, the cutting saw 46 is rocked so as to move forward and backward in the radial direction of the material W, and the cutting operation is executed.

FIG. 5 shows a state in which the log WL cut into pieces by the cutting section 45 is separated from the material W gripped by the crawler chain 35 . A new cut edge WP is formed in the material W gripped by the crawler chain 35 . When forming the next log WL, the length from the new cut end WP to the cutting part 45 (cut saw 46) is measured by the length measuring part 38 (encoder 39) while feeding the material W from the material feeding part 30. (measure length). The material feeding unit 30 is stopped when the material W has been delivered to a preset length, and the material W is cut by the cutting unit 45 to form a log WL of a desired length.

FIG. 6 is a plan view showing a state in which the tree processing system 300 performs construction work. As shown in FIG. 6a, the length from the cut end WP to the cut portion 45 is measured while the material W is fed by the material feeder 30. As shown in FIG. The material W is formed with a cut edge WP that has been previously cut by the cutting unit 45 . When the length of the material W reaches the preset length LP, the material feeding unit 30 is stopped.

By cutting the material W with the cutting part 45 in the state shown in FIG. 6a, a log WL having a desired length can be formed as shown in FIG. 6b. The position of the newly formed incision WP matches the position of the cutting saw 46 of the cutting portion 45 . When the logs WL are subsequently formed from the same tree W, the logs WL are continuously formed by similarly measuring the length LP and cutting the logs with reference to the newly formed cut end WP. be able to.

FIG. 7 is a diagram showing a schematic configuration of the hydraulic circuit 50 of the tree processing device 100. As shown in FIG. As shown in FIG. 7, in the hydraulic circuit 50, hydraulic fluid supplied from a hydraulic fluid tank 51 and a hydraulic pump portion 52 causes the rotator 13, the gripping portion 20, the tilt portion 25, the material feeding portion 30, the branching portion 40, and the cutting portion 45 are driven. In this embodiment, the rotator 13, the gripping unit 20, the tilting unit 25, the material feeding unit 30, the branching unit 40, and the cutting unit 45 are operated by operating an operation lever or the like (not shown) or by a control signal from the control unit 60. It is possible to control the drive of

The rotator 13 has a rotator drive motor 14 . The direction of the tree processing apparatus 100 can be controlled by rotating the rotator driving motor 14 forward, reverse, and stopping with the hydraulic oil.

The gripping portion 20 has an opening/closing hydraulic cylinder 23 that operates the opening/closing mechanism 21 . The opening and closing hydraulic cylinder 23 expands and contracts with the hydraulic oil, thereby opening and closing the two feeding units 30 to hold or release the tree W. As shown in FIG.

The tilt section 25 has a tilt hydraulic cylinder 28 . Hydraulic oil expands and contracts the hydraulic cylinder 28 for tilting, thereby tilting the tree processing device main body 11 with respect to the tilt arm 27, and changing the posture of the tree processing device main body 11 between the first posture P1 (see FIG. 4a) and the second posture P1 (see FIG. 4a). P2 and P2 (see FIGS. 2 and 4b).

The material feeding section 30 has two driving motors 34 for material feeding. The crawler chain 35 is driven and the trees W are sent out by synchronously rotating the material-sending drive motor 34 with hydraulic oil. In addition, drive control is performed to drive, decelerate, and stop the material feeding drive motor 34 so that the cutting portion 45 can cut the material W at a position where the material W has been fed out by a predetermined length.

The branching part 40 has an opening/closing body hydraulic cylinder 42 for opening/closing the opening/closing body 41 . The opening and closing body hydraulic cylinder 42 expands and contracts with the operating oil, thereby opening and closing the opening and closing body 41 to hold the tree W gripped by the gripping portion 20 .

The cutting section 45 has a cutting drive motor 47 and a cutting hydraulic cylinder 48 . When the cutting saw driving motor 47 is rotated by the hydraulic oil, the cutting saw 46 is driven to perform the cutting operation. Further, when the hydraulic cylinder 48 for cutting saw is expanded and contracted by hydraulic oil, the cutting saw 46 is rocked so as to move forward and backward in the radial direction of the material W, and the cutting operation is executed.

[Material feeding part]
Next, the configuration of the material feeding section 30 will be described in detail. FIG. 8 is a front view of the material feeding section 30. FIG. 9 is a cross-sectional view taken along the line A--A of FIG. 8. FIG. 10 is a cross-sectional view taken along line BB of FIG. 8. FIG. FIG. 11 is a diagram showing part of the crawler chain 35. As shown in FIG. 12 is a cross-sectional view taken along line CC of FIG. 11. FIG. 13 is a cross-sectional view taken along line DD of FIG. 11. FIG. 8 to 13, one direction in which the crawler chain 35 is caused to travel to cause the tree W to travel is denoted by D1 (see FIG. 4b), and one direction perpendicular to the direction D1 and parallel to the crawler chain 35 is denoted by D2. One direction perpendicular to D1 and direction D2 will be described as D3.

As shown in FIG. 8, the material feeding section 30 has a frame 31, a drive sprocket 32 (see FIG. 9), a driven sprocket 33 (see FIG. 9), a material feeding drive motor 34, and a crawler chain 35. . Assuming that the side surface of the feeding unit 30 where the crawler chain 35 is pressed against the tree W is the tree contact surface 30A (see FIGS. 9 and 10), FIG. 8 shows the surface opposite to the tree contact surface 30A. ing.

The frame 31 is a portion that forms the base of the material feeding section 30 and is attached to the opening/closing mechanism 21 . A driving sprocket 32 and a driven sprocket 33 are supported by the frame 31 (see FIG. 9). A crawler chain 35 is wound around the drive sprocket 32 and the driven sprocket 33 .

The material feeding drive motor 34 is attached to the frame 31, and the drive shaft passes through the frame 31 and is connected to the drive sprocket 32 (see FIG. 9). The material feed drive motor 34 is a hydraulic motor driven by hydraulic oil, and rotates forward, reverse, and stops according to a control signal input from the control section 60 . The crawler chain 35 is driven to travel by rotating the drive sprocket 32 with the material feeding drive motor 34 .

As shown in FIGS. 8 and 9, the crawler chain 35 is formed by connecting a plurality of crawler links 36 in an endless manner. In the crawler chain 35 of this embodiment, three rows of crawler links 36 are arranged in a direction D2 orthogonal to the running direction D1. The three rows of crawler links 36 are arranged in a staggered manner and are interconnected by shafts 364 (see FIG. 10).

A plurality of spikes 37 are arranged on the outer surface of each crawler link 36 . The spike 37 is a driving force transmitting portion when the trees W are gripped and delivered by the two feeding portions 30, and is a non-slip. The tree W is gripped by the tree contact surfaces 30A of the two feeding units 30, and the two crawler chains 35 are strongly pressed against the tree W and driven to travel in the same direction, thereby gripping the tree. It is possible to send out the tree W that has been cut in the material length direction.

Here, the arrangement of the plurality of spikes 37 will be explained. As shown in FIG. 11, four spikes 37 are arranged on each crawler link 36 according to the present embodiment. Each spike 37 is spaced apart (d1) in the direction of travel D1. Each spike 37 is also spaced apart (d2) in the direction D2. In this way, the spikes 37 are arranged so as not to overlap each other in the running direction D1 and the direction D2. It can be made slippery. Further, even if the spikes 37 temporarily slip on the tree W, since the spikes 37 are distributed in the direction D2, the spikes 37 are likely to come into contact with a wide range of the surface of the tree W. As a result, it is possible to easily prevent slipping and to easily transmit the driving force to the tree W. The distance (d1) between the spikes 37 in the running direction D1 may not be the same, and the distance (d2) between the spikes 37 in the direction D2 may not be the same.

Next, the configuration of each part of the crawler chain 35 will be described in detail. As shown in FIGS. 11 to 13, the crawler chain 35 includes a plurality of crawler links 36, a shaft 364 connecting the plurality of crawler links 36, bushings 365, bearings 366, rollers 367, and outer links 368. there is

The crawler link 36 has a crawler link body 361 and a shaft holding portion 362 . The crawler link 36 is integrally formed of metal. The crawler link main body 361 is a plate-like portion, and a plurality of spikes 37 are provided on one surface on the tree contact surface 30A side.

The shaft holding portion 362 is provided on the surface of the crawler link body 361 opposite to the surface on which the spikes 37 are provided. The shaft holding portion 362 is a portion through which a shaft 364 connecting the crawler links 36 is inserted. As shown in FIG. 12, the shaft holding portions 362 are provided on the front end side and rear end side of the crawler link main body 361 in the traveling direction D1. Further, as shown in FIG. 13, the shaft holding portions 362 are spaced apart in the direction D2. The shaft holding portion 362 is provided with a through hole 363 through which the shaft 364 and the bush 365 are inserted.

The shaft 364 is a member that connects the plurality of crawler links 36 . Shaft 364 is made of metal. Bushings 365 , bearings 366 and rollers 367 are fitted on the outside of shaft 364 . The shaft 364 is inserted through the shaft holding portions 362 of the three rows of crawler links 36 arranged in a staggered manner, thereby connecting the crawler links 36 arranged in three rows in the direction D2 to each other and extending in the traveling direction D1. a plurality of crawler links 36 arranged in an endless manner. Outer links 368 are attached to both ends of the shaft 364 to fix the position of the shaft 364 .

Bushing 365 is a tubular member made of metal. The bushing 365 is fitted on the outside of the shaft 364 and inserted through the shaft holding portion 362 of the crawler link 36 . S45C, for example, can be used as the material of the bush 365 .

Bearing 366 is fitted between bushing 365 and roller 367 . The bearing 366 is made of synthetic resin and provided to reduce the frictional force between the bush 365 and roller 367 . Although the material of the bearing 366 is not particularly limited, it is preferable to use a material that has a small coefficient of friction and is resistant to wear under a large load. A suitable material for the bearing 366 is, for example, MC nylon.

Rollers 367 are fitted outside bearings 366 . The roller 367 is a member that engages with the driving sprocket 32 and the driven sprocket 33 to transmit driving force to the crawler chain 35 . S45C, for example, can be used as the material of the roller 367 .

A bearing 366 made of synthetic resin is arranged between a bushing 365 fitted to a shaft 364 and a roller 367, so that the crawler chain 35 can move when the crawler chain 35 is driven to travel while being pressed against a tree W. It is possible to reduce the frictional force of the part. As a result, loss of power for driving the material feeding unit 30 can be suppressed. In addition, noise during material feeding can be suppressed, and the consumption of chain oil supplied to the crawler chain 35 can be suppressed.

A slide rail 345 is arranged on the frame 31 along the running direction D1 of the crawler chain 35 (see FIGS. 10 and 13). The slide rail 345 is arranged so that the roller 367 of the crawler chain 35 contacts it while rolling. A suitable material for the slide rail 345 is, for example, S45C.

By providing the slide rail 345, it is possible to reduce the frictional force generated in the contact portion of the crawler chain 35 while the roller 367 rolls, thereby suppressing the loss of the power for driving the material feeding section 30 and reducing noise and noise. Chain oil consumption can be suppressed.

Further, a slider 346 is arranged on the frame 31 along the running direction D1 of the crawler chain 35 (see FIGS. 10 and 13). The slider 346 is arranged so as to be in sliding contact with the shaft holding portion 362 of the crawler link 36 . A suitable material for the slider 346 is, for example, MC nylon.

By providing the slider 346, the load generated when the crawler chain 35 is pressed against the tree W can be distributed not only to the roller 367 but also to the shaft holding portion 362, and the pressure applied to the roller 367 can be reduced. , the wear of the roller 367 can be reduced.

[Modification]
The tree processing apparatus according to the present invention is not limited to the embodiments described above. In this embodiment, two encoders are provided, but one or three or more encoders may be provided.

Further, the shape of the crawler links forming the crawler chain is not limited to the above-described embodiment.

Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately modifying the above-described embodiment without departing from the scope of the invention.

INDUSTRIAL APPLICABILITY The present invention can be used for a tree processing device for tree construction work.

100 Tree processing device 200 Base machine 300 Tree processing system 30 Material feed unit 31 Frame 32 Drive sprocket 33 Driven sprocket 34 Drive motor for material feed (driving source)
35 Crawler chain 36 Crawler link 364 Shaft 366 Bearing 367 Roller W Tree, lumber

Claims (3)

A tree processing device comprising a feeding unit for feeding a gripped tree in a material length direction,
The material feeding unit
a frame;
a driving sprocket and a driven sprocket supported by the frame;
a drive source for driving the drive sprocket;
an endless crawler chain that is wound around the driving sprocket and the driven sprocket;
The crawler chain is
multiple crawler links;
a shaft connecting adjacent crawler links;
a roller fitted over the shaft and engaging the driving sprocket and the driven sprocket;
a bearing disposed between the shaft and the roller;
The bearing is made of synthetic resin,
Tree processing equipment. The frame includes
A slide rail is arranged along the running direction of the crawler chain so that the roller contacts while rolling.
The tree treatment device according to claim 1. In the crawler link,
A shaft holding portion through which the shaft is inserted is provided,
The frame includes
A slider is arranged along the running direction of the crawler chain so as to be in sliding contact with the shaft holding portion.
The tree processing device according to claim 1 or 2.

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