Wood chip carry-out device, and wood chip stuffing machine

Abstract

To provide: a wood chip carry-out device capable of improving durability of a screw blade, while reliably preventing wood chips from being stuffed; and a wood chip stuffing machine comprising the same.SOLUTION: A wood chip carry-out device 8 comprises a hopper 13 for receiving wood chips Wc, an arcuate groove 13c formed at a bottom part 13g of the hopper, an opening 38 provided at a chip discharge side end plate 13b, a discharge pipe 41 attached to the chip discharge side end plate 13b, a chip discharge rotor 21 supported by a bearing 22 provided at a driving device side end plate 13a, a chip agitation rotor 24 provided above the chip discharge rotor 21, and a driving device 28 for rotating the chip discharge rotor 21 and the chip agitation rotor 24. Inside the hopper 13, a partition plate 45 for partially partitioning between the chip discharge rotor 21 and the chip agitation rotor 24 is attached onto an opening 38 side.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a wood chip discharge device that discharges wood chips using a screw blade and packs them into bags, and a wood chip packing machine using the same. [Background technology]

[0002] Conventionally, a measure has been taken to pack wood chips into net bags to form wood chip filters, and to pile up these wood chip filters on slopes or the like to filter muddy water, thereby preventing mud from flowing onto roads or rivers or accumulating on the riverbed. Patent Document 1 discloses a wood chip conveying device that can efficiently pack wood chips, and a wood chip packing machine that uses this device.

[0003] Figure 5 shows a cross-sectional view of a conventional wood chip discharge device 8 corresponding to Figure 4 of this embodiment. Note that the same reference numerals shown in Figure 5 as those in Figure 4 will be explained in detail later. The wood chip discharge device 8 is provided with a hopper 13 that receives wood chips, and a chip discharge rotor 21 that extends from an arc-shaped groove 13c formed in a bottom plate 13g of the hopper 13 into the discharge pipe 41.

[0004] Furthermore, screw blades 21b and 21c are provided on shaft 21a of chip discharge rotor 21. Furthermore, chip agitator rotor 24 is provided above chip discharge rotor 21 within hopper 13, and agitator blade 24c is attached to one of multiple disks 24b formed on shaft 24a of chip agitator rotor 24. Chip discharge rotor 21 and chip agitator rotor 24 are rotated by drive unit 28.

[0005] In Patent Document 1, the outer diameter D2 of the portion of the screw blade 21c that passes through the opening 38 provided in the chip discharge side end plate 13b and the discharge pipe 41 attached to the opening 38 is set smaller than the outer diameter D1 of the portion of the screw blade 21b located within the arcuate groove 13c. This ensures a gap G between the inner surfaces of the opening 38 and discharge pipe 41 and the screw blade 21c that passes through these portions. This prevents the wood chips Wc from getting caught between the opening 38 or the inner surface of the discharge pipe 41 and the screw blade 21c, causing clogging, and allows the wood chips Wc to be efficiently discharged.

[0006] On the other hand, in the wood chip discharge device disclosed in Patent Document 2, an opening 13d for discharging wood chips is provided on the underside of the arc-shaped groove 13c on the base end side (the drive unit side end plate 13a side) of the chip discharge rotor 21. An openable and closable lid 44 is provided on the opening 13d. If a blockage occurs while the wood chips We are being discharged, the lid 44 on the opening 13d is opened and the chip discharge rotor 21 is rotated in the reverse direction, causing the wood chips We to fall through the opening 13d and be discharged.

[0007] This prevents the wood chips Wc from being compacted toward the base end of the chip discharge rotor 21 during reverse rotation, and allows the wood chips Wc to be quickly cleared from clogging at the base end. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 5713321 [Patent Document 2] Patent No. 6061887 Summary of the Invention [Problem to be solved by the invention]

[0009] As the chip agitator rotor 24 rotates in the direction of the arrow shown in Figure 5, the wood chips Wc introduced into the hopper 13 are agitated by the agitator blade 24c. Although the agitator blade 24c agitates the wood chips Wc to eliminate stagnation, it does not have the function of transporting the wood chips Wc in one direction like the screw blades 21b, 21c. Therefore, the wood chips Wc agitated by the agitator blade 24c near the chip discharge end plate 13b move under their own weight toward the lower chip discharge rotor 21, as shown by the arrow.

[0010] Meanwhile, the wood chips Wc present around the chip discharge rotor 21 in the arc-shaped groove 13c are transported by the screw blade 21b toward the opening 38 formed in the chip discharge side end plate 13b, as shown by the arrow in Figure 5. In this way, around the chip discharge rotor 21 on the chip discharge side end plate 13b side, the wood chips Wc that have moved under their own weight after mixing and the wood chips Wc transported by the screw blade 21b gather together to form consolidated wood chips Wc1. Furthermore, near the opening 38, the wood chips Wc1 gather even more densely to form consolidated wood chips Wc2.

[0011] If clogging occurs near the opening 38 as the wood chips Wc2 form, there is a problem in that the high-density wood chips Wc2 will cause the screw blade 21b to wear out prematurely. To address this issue, it is conceivable to open the lid 44 on the opening 13d of the screw blade 21b and reverse the chip discharge rotor 21, causing the wood chips Wc to fall through the opening 13d and be discharged. However, this does not change the fact that consolidated wood chips Wc1 and Wc2 are still formed during normal operation, i.e., when the chip discharge rotor 21 is rotating forward. Therefore, it is necessary to prevent the formation of consolidated wood chips Wc1 and Wc2, reliably prevent clogging of the wood chips Wc, and suppress premature wear of the screw blade 21b, thereby improving the durability of the screw blade 21b.

[0012] The present invention has been made in consideration of such problems, and aims to provide a wood chip discharge device and a wood chip loading machine equipped with the same that can reliably prevent wood chip clogging by avoiding the formation of compacted wood chips, while improving the durability of the screw blades. [Means for solving the problem]

[0013] In order to achieve the above-mentioned object, the wood chip discharge device of the present invention comprises a hopper for receiving wood chips, an arc-shaped groove formed at the bottom of the hopper, an opening provided in the chip discharge side end plate of the hopper that is continuous with the arc-shaped groove, a discharge pipe that communicates with the opening and has one end attached to the chip discharge side end plate and the other end to which a net bag for filling chips is attached, a chip discharge rotor that is supported by a bearing provided on the drive device side end plate opposite the chip discharge side end plate, extends from the arc-shaped groove into the discharge pipe and has a first screw blade provided on the first shaft, a chip agitator rotor that is provided above the chip discharge rotor in the hopper and has an agitator blade attached to the second shaft, and a drive device that rotates the chip discharge rotor and the chip agitator rotor, and is characterized in that a partition plate is installed inside the hopper to partially separate the chip discharge rotor and the chip agitator rotor on the opening side.

[0014] In addition, the wood chip loading machine of the present invention is characterized in that the above-mentioned wood chip discharge device is attached to the front arm of a self-propelled working machine which has an upper rotating body attached to a lower running body via a rotating device, so that it can rotate up and down. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a wood chip discharge device and a wood chip filling machine equipped with the same, which can reliably prevent wood chip clogging by avoiding the formation of compacted wood chips, while improving the durability of the screw blades. [Brief explanation of the drawings]

[0016] [Figure 1]1 is a side view of a wood chip packer according to an embodiment of the present invention. [Figure 2] 1 is a side view of a wood chip discharge device according to an embodiment of the present invention. [Figure 3] 3 is a side view of the wood chip discharge device as seen from the opposite side in the machine body width direction to the side shown in FIG. 2. FIG. [Figure 4] 3 is a cross-sectional view of the wood chip discharge device as seen from the direction AA in FIG. 2. [Figure 5] FIG. 5 is a cross-sectional view corresponding to FIG. 4 of a conventional wood chip discharge device. DETAILED DESCRIPTION OF THE INVENTION

[0017] Figure 1 shows a side view of a wood chip loader according to one embodiment of the present invention. The wood chip loader is equipped with a track-type undercarriage 1 that constitutes a self-propelled work machine, and a revolving frame 3a is installed on the undercarriage 1 via a revolving device 2. A power unit 4 including an engine, a hydraulic pump driven by the engine, and a generator, as well as a cab 5 and a counterweight 6 are mounted on the revolving frame 3a, which together constitute an upper revolving body 3.

[0018] A front 7 is attached to the swivel frame 3a, and the front 7 is equipped with a boom 9 attached to the swivel frame 3a so that it can be raised and lowered by a boom cylinder 10, which is a hydraulic cylinder, and an arm 11 attached to the tip of the boom 9 so that it can rotate up and down by an arm cylinder 12, which is also a hydraulic cylinder. The wood chip discharge device 8 is attached to the tip of the arm 11 of the front 7, and includes a hopper 13 that receives wood chips.

[0019] A bracket 14 for attaching the wood chip discharge device 8 to the arm 11 is attached to the hopper 13. The bracket 14 is attached to the arm 11 via a pin 15 so that it can rotate up and down. A hydraulic cylinder 16 is attached to the arm 11, and the hydraulic cylinder 16 rotates the wood chip discharge device 8 up and down. More specifically, the piston rod of the hydraulic cylinder 16 is pinned to both the other end of a first link 17, one end of which is pinned to the arm 11, and the other end of a second link 18, one end of which is pinned to the bracket 14 of the hopper 13.

[0020] Fig. 2 shows a side view of a wood chip discharge device 8 according to one embodiment of the present invention, Fig. 3 shows a side view of the wood chip discharge device 8 as seen from the opposite side in the machine width direction from the side shown in Fig. 2, and Fig. 4 shows a cross-sectional view of the wood chip discharge device 8 as seen from the direction AA in Fig. 2. The hopper 13 includes a drive unit-side end plate 13a, a chip discharge side end plate 13b, a front end plate 13e, a rear end plate 13f, and a bottom plate (bottom) 13g, and an arc-shaped groove 13c having a semicircular cross section is formed in the bottom plate 13g of the hopper 13. A chip discharge rotor 21 is fitted into and supported in the arc-shaped groove 13c, and the chip discharge rotor 21 is cantilevered in the arc-shaped groove 13c by a bearing 22 provided on the drive unit-side end plate 13a.

[0021] Screw blades (first screw blades) 21b and 21c are provided on shaft portion (first shaft portion) 21a of chip discharge rotor 21. Chip agitator rotor 24 is provided above chip discharge rotor 21 within hopper 13. Shaft portion 24a of chip agitator rotor 24 is supported by bearings 25 and 26 provided on both end plates 13a and 13b, respectively. Disks 24b are attached to shaft portion (second shaft portion) 24a of chip agitator rotor 24 at intervals, and agitator blades 24c are attached to a portion of each disk 24b.

[0022] As shown in Figure 2, each agitator blade 24c is formed integrally with a small-diameter blade portion a and a large-diameter blade portion b. A drive unit 28 that rotates the chip discharge rotor 21 and the chip agitator rotor 24 is attached to the drive unit-side end plate 13a. As shown in Figure 3, the drive unit 28 includes a hydraulic or electric drive motor 30 attached to the drive unit-side end plate 13a of the hopper 13, an output sprocket 31 of the drive motor 30, a sprocket 32 ​​fixed concentrically to the shaft portion 21a of the chip discharge rotor 21, and a sprocket chain 33 wound around the sprockets 31 and 32.

[0023] Furthermore, drive unit 28 includes a sprocket 34 mounted on shaft 21a of chip discharge rotor 21 separately from sprocket 32, a sprocket 35 mounted on shaft 24a of chip agitator rotor 24, and a sprocket chain 36 wound around sprockets 34 and 35. In drive unit 28 configured in this manner, drive motor 30 is driven to rotate chip discharge rotor 21 and chip agitator rotor 24 simultaneously.

[0024] As shown in Figure 4, the chip discharge side end plate 13b is provided with a circular chip discharge opening 38, with the lower half of the inner periphery of the opening 38 continuing to the end of the arc-shaped groove 13c. A pipe mounting plate 40 is fixed to the outer surface of the chip discharge side end plate 13b by welding or the like. One end of a discharge pipe 41 is attached to the chip discharge side end plate 13b by bolts or the like, concentric with the opening 38, so as to communicate with the opening 38 via the pipe mounting plate 40. A net bag 42 for filling chips is attached to the other end of the discharge pipe 41 by a presser band 43.

[0025] The chip discharge rotor 21 extends from the arcuate groove 13c into the discharge pipe 41. The outer diameter D2 of the screw blade 21c of the chip discharge rotor 21 that passes through the opening 38 and the inner surface of the discharge pipe 41 is set smaller than the outer diameter D1 of the screw blade 21b that is located within the arcuate groove 13c. This ensures a gap G between the opening 38, the inner surface of the discharge pipe 41, and the screw blade 21c that passes through these portions.

[0026] 2 and 4, a partition plate 45 is attached to the chip discharge side end plate 13b. The partition plate 45 partially separates the space between the chip discharge rotor 21 and the chip agitator rotor 24 on the opening 38 side. By providing the partition plate 45, wood chips Wc present near the chip discharge side end plate 13b do not move under their own weight toward the chip discharge rotor 21 below. Therefore, as shown in FIG. 4, a space S can be formed below the partition plate 45 within the hopper 13.

[0027] Chip agitator rotor 24 also has a screw blade (second screw blade) 24d in a region of its shaft 24a that is at least above partition plate 45, from the chip discharge side end plate 13b side. Meanwhile, the aforementioned agitator blade 24c is provided in a region of shaft 24a of chip agitator rotor 24 that is closer to drive unit side end plate 13a than the region above partition plate 45. As a result, wood chips Wc introduced into hopper 13 are transported above partition plate 45 to the drive unit side end plate 13a side by screw blade 24d of chip agitator rotor 24, and then agitated by agitator blade 24c.

[0028] When wood chips Wc are stuffed into the chip filling net bag 42 using the wood chip discharge device 8, as shown in Figure 1, the wood chip stuffing machine is brought close to the accumulated wood chips Wc, and the front 7 is operated to scoop up the wood chips Wc with the hopper 13 and introduce them into the hopper 13. Also, before or after the wood chips Wc are introduced into the hopper 13, the open end of the chip filling net bag 42 is placed in a retracted state over the discharge pipe 41. At this time, the tip of the chip filling net bag 42 is positioned at the tip surface of the discharge pipe 41. In this state, a pressure band 43 is placed over the chip filling net bag 42, and the pressure band 43 is connected to the chip discharge side end plate 13b by a connecting member (not shown).

[0029] Then, the drive motor 30 is driven to simultaneously rotate the chip agitator rotor 24 and the chip discharge rotor 21. As a result, the wood chips Wc in the hopper 13 are transported toward the drive unit-side end plate 13a by the screw blade 24d of the chip agitator rotor 24, as shown by the arrow in FIG. 4. The wood chips Wc are then agitated by the agitator blade 24c and move downward toward the chip discharge rotor 21 due to their own weight. The screw blades 21b and 21c of the chip discharge rotor 21 then transport the wood chips Wc that have moved from the chip agitator rotor 24 side through the arc-shaped groove 13c and opening 38 to the discharge pipe 41, as shown by the arrow in FIG. 4, and then packed into the chip filling net bag 42 via the discharge pipe 41.

[0030] During this filling operation, the swivel device 2 is operated to rotate the wood chip discharge device 8 in a direction away from the net bag 42 for filling chips, and filling is performed with the net bag 42 for filling chips placed on the ground. At this time, the net bag 42 for filling chips, which is placed in a contracted state over the discharge pipe 41, is gradually unwound as the wood chips Wc are filled, but the unwound net bag 42 for filling chips is resisted by the pressure band 43.

[0031] This allows the wood chips Wc to be filled appropriately into the chip filling net bag 42. Once the wood chips Wc have been filled, the pressure band 43 is loosened, the turning device 2 is turned in a direction away from the chip filling net bag 42, the chip filling net bag 42 is removed from the discharge pipe 41, and the open end of the chip filling net bag 42 is closed with a string or the like. This completes the wood chip filter in which the wood chips Wc are filled into the chip filling net bag 42.

[0032] As described above, the wood chip discharge device 8 of this embodiment includes the above-mentioned hopper 13, arcuate groove 13c, opening 38, discharge pipe 41, chip discharge rotor 21, chip agitator rotor 24, and drive unit 28. A partition plate 45 is attached to chip discharge side end plate 13b, which partially separates the space between chip discharge rotor 21 and chip agitator rotor 24 on the opening 38 side.

[0033] As a result, in the hopper 13, the wood chips Wc present near the chip discharge side end plate 13b do not move under their own weight toward the lower chip discharge rotor 21, so that compacted wood chips Wc1 are not formed around the chip discharge rotor 21 on the chip discharge side end plate 13b side. Furthermore, because overly compacted wood chips Wc2 are not formed near the opening 38, clogging of the wood chips Wc can be reliably prevented. Furthermore, by preventing the formation of wood chips Wc1 and Wc2, early wear of the screw blade 21b is suppressed, thereby improving the durability of the screw blade 21b.

[0034] Furthermore, the chip agitator rotor 24 has a screw blade 24d in a region of its shaft 24a that is at least above the partition plate 45 from the chip discharge side end plate 13b side, and an agitator blade 24c in a region of the shaft 24a that is closer to the drive unit side end plate 13a than the region above the partition plate 45. As a result, wood chips Wc introduced into the hopper 13 are transported by the screw blade 24d above the partition plate 45 toward the drive unit side end plate 13a and then agitated by the agitator blade 24c. This allows the wood chips Wc introduced into the hopper 13 to be quickly transported from above the partition plate 45 to the drive unit side end plate 13a side and agitated by the agitator blade 24c. Therefore, the partition plate 45 does not impede the smooth transport of the wood chips Wc.

[0035] More specifically, the screw blade 24d of the chip agitator rotor 24 is configured to transport the wood chips Wc to the drive unit side end plate 13a above the partition plate 45. The agitator blade 24c of the chip agitator rotor 24 is configured to agitate the wood chips Wc transported by the screw blade 24d. The screw blade 21b of the chip discharge rotor 21 is configured to move the wood chips Wc agitated by the agitator blade 24c toward the opening 38 and transport them to the discharge pipe 41. In this way, this embodiment enables smooth transport of the wood chips Wc while avoiding the formation of compacted wood chips Wc1 and Wc2. Therefore, the wood chips Wc can be efficiently packed while reliably preventing clogging of the wood chips Wc.

[0036] This concludes the description of one embodiment of the present invention. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit and scope of the present invention. For example, in the above embodiment, the partition plate 45 is attached to the chip discharge side end plate 13b, but the attachment location of the partition plate 45 is not limited thereto. Specifically, as long as the interior of the hopper 13 can be partially partitioned on the side of the opening 38 between the chip discharge rotor 21 and the chip agitator rotor 24, the partition plate 45 may be attached to any of the drive unit side end plate 13a, the front side end plate 13d, the rear side end plate 13e, and the bottom plate 13f. In other words, the partition plate 45 may be attached to any location within the hopper 13.

[0037] In the above embodiment, the chip discharge rotor 21 is cantilevered in the arc-shaped groove 13c by a bearing 22 provided on the drive unit side end plate 13a. However, various support modes are possible, as long as the chip discharge rotor 21 is supported by the bearing 22. In addition, the wood chip discharge device 8 in the above embodiment is attached so as to be able to rotate up and down to an arm 11 on the front 7 of a self-propelled working machine having an upper rotating body 3 attached via a rotating device 2 to a lower running body 1.

[0038] This allows the work machine to self-propel, turn, or operate the front 7, so that wood chips Wc can be directly introduced into the hopper 13 from a wood chip collection location or the bed of a truck, thereby realizing a highly maneuverable wood chip loading machine. However, this is not limiting, and the wood chip discharge device 8 may be installed and operated independently, or may be attached to a machine other than the work machine described above.

[0039] 4 also shows that, as in the conventional case of FIG. 5, the outer diameter D2 of screw blade 21c is set smaller than the outer diameter D1 of screw blade 21b to form a gap G. Also, FIG. 4 shows that an opening 13d for discharging wood chips is provided on the lower surface of arc-shaped groove 13c, and an openable / closable lid 44 is provided on opening 13d. However, these configurations are characteristic features of Patent Documents 1 and 2 mentioned above, and may not be provided in wood chip discharge device 8 of this embodiment. [Explanation of symbols]

[0040] 1 Undercarriage 2 Swivel device 3 Upper rotating body 7. Front 8 Wood chip discharge device 11 Arm 13 Hopper 13a Drive unit side end plate 13b Tip ejection side end plate 13c arcuate groove 13g bottom plate (bottom) 21 Chip discharge rotor 21a Shaft part (1st shaft part) 21b Screw blade (first screw blade) 22 Bearings 24 Chip stirring rotor 24a Shaft part (2nd shaft part) 24c stirring blade 24d screw blade (second screw blade) 28 Drive unit 38 Opening 41 Exhaust pipe 42 Net bag for filling chips 45 Divider Wc wood chips

Claims

1. a hopper for receiving wood chips; an arc-shaped groove formed in the bottom of the hopper; an opening provided in the chip discharge side end plate of the hopper, the opening being continuous with the arc-shaped groove; a discharge pipe that communicates with the opening, has one end attached to the chip discharge side end plate, and the other end attached to a net bag for filling chips; a chip discharge rotor supported by a bearing provided on a drive device side end plate opposite the chip discharge side end plate, extending from the arc-shaped groove to the inside of the discharge pipe, and having a first screw blade provided on a first shaft portion; a chip agitating rotor provided above the chip discharging rotor in the hopper and having an agitating blade attached to a second shaft portion; a drive unit that rotates the chip discharge rotor and the chip agitation rotor; Equipped with A wood chip discharge device characterized in that a partition plate is attached inside the hopper to partially separate the space between the chip discharge rotor and the chip agitation rotor on the side of the opening.

2. The wood chip conveying device described in claim 1, characterized in that the chip agitating rotor has a second screw blade in an area that is at least above the partition plate from the chip discharge side end plate of the second shaft portion, and has the agitating blade in an area closer to the drive device side end plate of the second shaft portion than the area above the partition plate.

3. The second screw blade of the chip agitation rotor is configured to transport the wood chips above the partition plate toward the drive device side end plate, The stirring blade of the chip stirring rotor is configured to stir the wood chips transported by the second screw blade, The wood chip discharge device described in claim 2, characterized in that the first screw blade of the chip discharge rotor is configured to move the wood chips agitated by the agitation blade toward the opening and transport them to the discharge pipe.

4. A wood chip loading machine characterized in that a wood chip discharge device described in any one of claims 1 to 3 is attached to the front arm of a self-propelled working machine having an upper rotating body attached to a lower running body via a rotating device, so that it can rotate up and down.

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