JP3218144U - Wood peeling machine - Google Patents

Abstract

The present invention provides a wood peeling apparatus for improving bark peeling efficiency.
The drum has a drum that is rotated about an axis with respect to a base and peels off the bark of the raw wood inside, and a large number of impact pieces that peel off the bark from the raw wood are provided on the inner surface of the drum. The impact piece 10 is joined to the inner surface of the drum 1, the upright side 12 rising from one end of the bottom side 11, and the inclined side 13 inclined from the upper end of the upright side 12 toward the other end of the bottom side 11. It is formed in a triangular plate shape, the inclined side 13 of the impact piece 10 is formed in a corrugated shape, and the impact piece 10 has a base on the upper side of the rotation direction R of the drum 1 with the front and back surfaces intersecting the axial direction of the drum 1. 11 is positioned so that the other end of the base 11 is positioned on the lower side of the rotation direction R of the drum 1, and the reinforcing piece 20 that is joined to the inner surface of the drum 1 by the impact piece 10 and reinforces the impact piece 10. Was attached.
[Selection] Figure 3

Description

  The present invention relates to a wood peeling apparatus for peeling off the bark of raw wood, particularly for wood in which the raw wood is put into a drum that is rotated and the bark of the raw wood is peeled off by an impact piece provided in the drum. The present invention relates to a peeling apparatus.

  Conventionally, as this kind of peeling apparatus for wood, what is shown by Unexamined-Japanese-Patent No. 2-81604 (patent document 1) is known, for example. This wood peeling apparatus has a drum that is rotated around an axis with respect to a base and peels off the bark of the raw wood inside, and this drum has an inlet into which the raw wood is introduced at one end side. The other end side is made up of a treated wood that has been peeled off and an outlet through which the peeled bark is discharged, and the base is tilted so that the inlet side is up and the outlet side is down. is there. On the inner surface of the drum, a large number of bar-shaped protrusions having a mountain-shaped cross section along the axial direction of the drum are provided, and the rotation of the drum causes the raw trees to collide with the protrusions to peel the bark. .

JP-A-2-81604

By the way, in the above-mentioned conventional peeling apparatus for wood, the protrusion is formed in a bar shape with a cross-sectional mountain shape, and is provided along the axial direction of the drum. Therefore, there was a problem that the bark peeling efficiency was inferior.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a wood peeling apparatus for improving bark peeling efficiency.

In order to achieve such an object, a wood peeling apparatus according to the present invention has a drum that is rotated about an axis with respect to a base and peels off the bark of the raw wood inside, and the drum is connected to one end side. The other end side has an input port through which raw wood is input and a treated wood that has been peeled off and a discharge port through which the peeled bark is discharged, with the input port side facing up and the discharge port side facing down In the wood peeling apparatus in which a large number of impact pieces for peeling the bark from the raw wood are provided on the inner surface of the drum so as to be inclined,
The impact piece is formed in a substantially triangular plate shape having a bottom side to be joined to the inner surface of the drum, a rising side rising from one end of the bottom side, and an inclined side inclined from the upper end of the vertical side toward the other end of the bottom side. Forming an inclined side of the impact piece in a corrugated shape, and the impact piece has its front and back surfaces intersecting the axial direction of the drum, and one end of the bottom side is located on the upper side in the rotation direction of the drum, The drum is provided such that the other end of the bottom is located on the lower side in the rotation direction of the drum, and a reinforcing piece is attached to the impact piece to reinforce the impact piece.

  As a result, when the bark of the raw tree is peeled, the raw tree is introduced from the drum inlet and the drum is rotated. Since a large number of impact pieces are provided in the drum, the raw wood flows down to the discharge port side while colliding with the impact pieces, and the bark is peeled off by the impact pieces in the flow-down process. Then, the treated wood and the peeled bark are discharged from the outlet. In this case, the impact piece is formed in a plate shape with an inclined side having a corrugated shape, and its front and back surfaces are provided so as to intersect the axial direction of the drum. Since the time becomes longer, the bark can be reliably peeled, and therefore the peeling efficiency can be greatly improved. In addition, since the front and back surfaces of the impact piece are provided so as to intersect the axial direction of the drum, when the impact of the raw wood is received, the impact piece is easily subjected to force in the direction of falling, but is reinforced by the reinforcement piece. The holding strength becomes high, the situation of falling down can be prevented, and the function can be secured.

  Then, if necessary, the impact piece is provided so that the front and back surfaces thereof are along the rotation direction of the drum, and the reinforcing piece has a height lower than the height of the impact piece and a width longer than the thickness of the impact piece. Are formed in a substantially rectangular plate shape, the center of the surface of the reinforcing piece is joined to the upright side of the impact piece, and the lower end surface of the reinforcing piece is joined to the inner surface of the drum. Thereby, the inclined side of the waveform of the impact piece can easily come into contact with the surface of the raw wood, and the peeling efficiency can be further improved. In addition, since the reinforcing piece is provided substantially at right angles to the impact piece and the rectangular corner portion protrudes in the axial direction, the log also comes into contact with the corner portion of the reinforcing piece. Increases, the residence time of the raw wood becomes longer, the bark can be peeled off more reliably, and the peeling efficiency can be improved.

  Further, if necessary, a plurality of circumferential groups composed of a plurality of predetermined impact pieces arranged at equal angles on the same inner circumference of the drum are provided, and the circumferential groups are arranged in the axial direction. Yes. As a result, the circumferential group in which a plurality of predetermined impact pieces are arranged at equal angles is arranged in the axial direction, so that the resistance increases, the residence time of the raw wood becomes longer, and the bark is more reliably secured. It can peel and can improve peeling efficiency.

  Further, if necessary, a plurality of axial groups in which a predetermined number of the circumferential groups are arranged at predetermined intervals in the axial direction are provided, and the axial groups are arranged in the axial direction, and the circumferential groups constituting each axial group The phase in the circumferential direction of the impact pieces adjacent to each other is made the same, and the phase in the circumferential direction of the impact pieces in the axial group adjacent to each other is shifted. As a result, in each axial group, peeling is performed by a plurality of circumferential groups having the same circumferential phase of the impact piece, but the circumferential phase of the impact piece is shifted between adjacent axial groups. Therefore, when the log flows down from the axial group on the upstream side to the axial group on the wake side, the way of impact against the impact pieces of the log will change, so the bark is more reliably secured It can peel and can improve peeling efficiency.

  In this case, it is effective to alternately shift the phase of the axial group in the opposite direction and set the phase shift width to the length of the substantially bottom side of the impact piece. Since the raw wood is alternately collided with the axial direction groups having different phases of the impact pieces, the bark can be more reliably peeled and the peeling efficiency can be improved.

  If necessary, the inner diameter D of the drum is 1500 mm ≦ D ≦ 4000 mm, the thickness Ts of the impact piece is 10 mm ≦ Ts ≦ 30 mm, and the length Ls of the impact piece is 150 mm ≦ Ls ≦ 400 mm. The height Hs of the impact pieces is 50 mm ≦ Hs ≦ 200 mm, and the number Ns (integer) of impact pieces in the circumferential group is 4 ≦ Ns ≦ 10. Within this range, bark can be effectively peeled.

  In addition, if necessary, a plurality of skin cutting blades for cutting the bark are provided on the inner surface of the drum. The skin cutting blade may be provided anywhere from the upstream side to the downstream side of the drum. However, if it is provided on the upstream side, the bark is cut when the raw wood thrown into the drum collides with the skin cutting blade. Become shorter. When it is provided on the downstream side, the bark peeled off from the raw wood will increase, but when the peeled treated wood collides with the skin cutting blade, the bark that enters between the treated wood and the skin cutting blade will be treated wood. Because it is pressed against the skin cutting blade, it is cut and shortened. Therefore, with the impact piece alone, the bark may be peeled off without being cut, and may be continuously long, and handling may be complicated, but the bark can be cut with a skin cutting blade, so the discharged bark is It is divided and therefore can be handled easily.

  Further, if necessary, a lower side joined to the inner surface of the drum, a rising side rising from one end of the lower side, and an inclined side inclined from the upper end of the rising side toward the other end of the lower side Formed in the shape of a substantially triangular plate, and the skin cutting blade has its front and back surfaces intersecting the axial direction of the drum, and one end of the lower side is located on the upper side of the drum in the rotational direction. The other end of the lower side is located on the lower side. Thereby, since the front and back surfaces of the skin cutting blade are provided so as to intersect with the axial direction of the drum, it becomes easy for the raw wood to come into contact, and the bark can be cut reliably. In addition, since the tip of the diagonal side is located on the lower side of the drum rotation direction and the base end (upper side) of the diagonal side is located on the upper side of the drum rotation direction, the logs, treated wood and bark are on the diagonal side from the tip. This also makes it easier to place the bark on this point.

  Furthermore, if necessary, one end of the lower side of the skin cutting blade is positioned on the drum outlet side, the other end of the lower side is positioned on the drum inlet side, and the skin cutting blade is The back surface is provided so as to be inclined and intersect in the axial direction of the drum. As a result, the tip of the slanted side is located on the drum inlet side and the base end (upper side) of the slanted side is located on the drum outlet side. This also makes it easier to place, and in this respect as well, the bark can be cut reliably.

  Furthermore, if necessary, a plurality of the above-mentioned skin cutting blades are arranged at equal angles on the same inner circumference of the drum, and are arranged on the discharge port side of the drum. As a result, when the peeled treated wood collides with the skin cutting blade, the bark that has entered between the treated wood and the skin cutting blade is pressed against the skin cutting blade at the discharge port side, which is the downstream side of the drum. However, since the skin cutting blades are arranged in multiple rows on the inner circumference, there are many opportunities for the bark and treated wood to come into contact with the skin cutting blade, and the bark can be cut reliably with that much. . As with the impact piece, a plurality of groups of skin cutting blades arranged at equal angles on the same inner circumference of the drum may be provided at intervals in the axial direction of the drum. It doesn't matter.

If necessary, the inner diameter D of the drum is 1500 mm ≦ D ≦ 4000 mm, the thickness Ts of the impact piece is 10 mm ≦ Ts ≦ 30 mm, and the length Ls of the impact piece is 150 mm ≦ Ls ≦ 400 mm. And the height Hs of the impact pieces is 50 mm ≦ Hs ≦ 200 mm, and the number Ns (integer) of impact pieces in the circumferential group is 4 ≦ Ns ≦ 10,
The thickness Tk of the skin cutting blade is 10 mm ≦ Tk ≦ 30 mm, the length Lk of the skin cutting blade is 150 mm ≦ Lk ≦ 400 mm, and the height Hk of the skin cutting blade is 50 mm ≦ Hk ≦ 200 mm. The number Nk (integer) of the circumferential cutting blades is 4 ≦ Nk ≦ 15 and Ns ≦ Nk. Within this range, bark can be effectively peeled and cut.

  According to the present invention, the impact piece is formed in a plate shape having a corrugated inclined side, and its front and back surfaces are provided so as to intersect the axial direction of the drum. Since it is difficult and the residence time is long, the bark can be reliably peeled, and therefore, the peeling efficiency can be greatly improved. In addition, since the front and back surfaces of the impact piece are provided so as to intersect the axial direction of the drum, when the impact of the raw wood is received, the impact piece is easily subjected to force in the direction of falling, but is reinforced by the reinforcement piece. The holding strength becomes high, the situation of falling down can be prevented, and the function can be secured.

The structure of the drum of the peeling machine for wood which concerns on embodiment of this invention is shown, (a) is plane sectional drawing, (b) is front sectional drawing. In the drum of the peeling machine for wood which concerns on embodiment of this invention, it is an expanded front sectional view which shows the structure by the side of an inlet. It is an AA line side surface sectional view in Drawing 2 showing composition of a drum of a peeling machine for wood concerning an embodiment of the invention. In the peeling machine for wood which concerns on embodiment of this invention, the structure of an impact piece and a reinforcement piece is shown, (a) is a top view, (b) is a front view, (c) is a right view. FIG. 3 is a side cross-sectional view taken along the line BB in FIG. 2 illustrating the configuration of the drum of the wood peeling apparatus according to the embodiment of the present invention. The structure of the drum of the peeling machine for wood which concerns on embodiment of this invention is shown, (a) is a side view by the side of a discharge port, (b) is principal part front sectional drawing by the side of a discharge port.

Hereinafter, based on an accompanying drawing, a peeling machine for wood concerning an embodiment of the invention is explained in detail.
As shown in FIGS. 1 to 6, the wood peeling apparatus S according to the embodiment of the present invention is iron that peels off the bark of an original tree and is rotated about an axis P with respect to the base 2. The metal drum 1 is provided. The drum 1 is configured to have an input port 3 through which raw wood is input at one end side, and a processed wood that has been peeled off at the other end side and a discharge port 4 through which the peeled bark is discharged. The base 2 is provided so as to be inclined so that the side is up and the discharge port 4 side is down. The drum 1 is supported by a pair of rollers 5 provided on the base 2 on the outer sides of both ends. The roller 5 is rotated by a drive source (not shown) such as an electric motor to rotate the drum 1.

  On the inner surface of the drum 1, a large number of impact pieces 10 for peeling the bark from the raw wood are projected. The impact piece 10 is formed of, for example, a hard metal such as high-speed steel or cemented carbide, and is fixed to the inner surface of the drum 1 by welding. As shown in FIG. 4, the impact piece 10 is inclined toward the other end 11 b of the base 11 from the base 11 that is joined to the inner surface of the drum 1, the vertical 12 that rises from one end 11 a of the base 11, and the upper end of the vertical 12. It is formed in the shape of a substantially triangular plate having inclined sides 13 that do. The inclined side 13 of the impact piece 10 is formed in a corrugated shape. As shown in FIGS. 2 and 3, the impact piece 10 has a drum so that the front and back surfaces intersect the axial direction of the drum 1, and in the embodiment, the front and back surfaces are along the rotation direction R of the drum 1. 1, the one end 11 a of the base 11 is positioned on the upper side of the rotation direction R of the drum 1, and the other end 11 b of the base 11 is positioned on the lower side of the rotation direction R of the drum 1. Is provided.

  Further, the impact piece 10 is provided with a reinforcing piece 20 that is joined to the inner surface of the drum 1 and reinforces the impact piece 10. As shown in FIG. 4, the reinforcing piece 20 is formed of a hard metal such as high-speed steel or cemented carbide, and has a height slightly lower than the height of the impact piece 10 and the impact piece. 10 is formed in a substantially rectangular plate shape having a width longer than the thickness Ts, and the substantially center of the surface of the reinforcing piece 20 is joined to the vertical side 12 of the impact piece 10 by welding. Is joined to the inner surface of the drum 1 by welding.

  Further, as shown in FIGS. 1 to 3, the drum 1 includes a plurality of impact pieces 10 (seven in the embodiment) arranged at equal angles on the same inner circumference of the drum 1. A plurality of circumferential groups GS are provided, and the circumferential groups GS are arranged in the axial direction. Specifically, a plurality of axial groups GJ (seven axial groups GJ in the embodiment) in which a predetermined number of circumferential groups GS are arranged at predetermined intervals in the axial direction (three circumferential groups GS in the embodiment) are provided. The axial direction group GJ is arranged in the axial direction. The circumferential phases of the impact pieces 10 adjacent to each other in the circumferential group GS (three circumferential groups GS in the embodiment) constituting each axial group GJ are set to be the same.

  On the other hand, the circumferential phases of the impact pieces 10 of the axial direction groups GJ (seven axial direction groups GJ in the embodiment) adjacent to each other are set to be shifted. Specifically, the phase of the axial direction group GJ is set so as to be alternately shifted in the opposite direction, and as shown in FIG. 3, the phase shift width z on the inner peripheral surface of the drum 1 is the impact piece. It is set to a length Ls of 10 substantially bottom sides 11. FIG. 3 shows a phase shift between the circumferential group GS (a) and the circumferential group GS (b) in FIG.

  In the embodiment, as shown in FIGS. 1, 2, 5, and 6, the drum 1 is arranged at an equal angle on the same inner circumference of the drum 1 on the inlet 3 side. One circumferential group GS (c) composed of a predetermined number (four in the embodiment) of impact pieces 10 is provided, and is equiangular on the same inner circumference of the drum 1 on the discharge port 4 side of the drum 1. A circumferential group GS (d) composed of a predetermined number (seven in the embodiment) of impact pieces 10 arranged in line with each other is provided adjacent to the axial group GJ on the discharge port 4 side. The circumferential group GS can be provided as appropriate without forming the axial group GJ.

  Further, as shown in FIGS. 2 and 5, on the inlet 3 side of the drum 1, a predetermined plurality (in the embodiment) are arranged at equal angles on the same inner circumference as the circumferential group GS (c). Four (4) first protrusions 21 are provided, and a predetermined plurality (three in the embodiment) of second protrusions 22 in a row are arranged at equal angles on the inner circumferential circle on the downstream side. Is provided. The first ridge piece 21 and the second ridge piece 22 have a function of correcting the posture so that the raw wood to be fed flows along the axis of the drum 1.

  As shown in FIGS. 1 and 6, a large number of skin cutting blades 30 for cutting the bark are provided on the inner surface of the drum 1. The skin cutting blade 30 is formed of, for example, a hard metal such as high-speed steel or cemented carbide, and is fixed to the inner surface of the drum 1 by welding. The skin cutting blade 30 has a lower side 31 joined to the inner surface of the drum 1, a rising side 32 rising from one end 31 a of the lower side 31, and an inclined side 33 inclined from the upper end of the rising side 32 toward the other end 31 b of the lower side 31. It is formed in a substantially triangular plate shape.

  The skin cutting blade 30 has its front and back surfaces intersecting the axial direction of the drum 1, one end 31 a of the lower side 31 is positioned on the upper side in the rotational direction R of the drum 1, and the lower side 31 is located on the lower side in the rotational direction R of the drum 1. It is provided so that the other end 31b is located. Further, one end 31a of the lower side 31 of the skin cutting blade 30 (the base end of the oblique side 33 and the rising side 32 side) is positioned on the discharge port 4 side of the drum 1, and the other end 31b of the lower side 31 (of the oblique side 33). The front end is positioned on the side of the inlet 3 of the drum 1, and the 30 cutting blades 30 are provided so that the front and back surfaces thereof are inclined in the axial direction of the drum 1.

  Further, the skin cutting blades 30 are arranged in a plurality of rows at the same angle on the same inner circumference of the drum 1, and are provided on the discharge port 4 side of the drum 1. As with the impact piece 10, a plurality of groups of skin cutting blades 30 arranged at equal angles on the same inner circumference of the drum 1 may be provided at intervals in the axial direction of the drum 1. It can be changed as appropriate.

  In the embodiment, the inner diameter D of the drum 1 is 1500 mm ≦ D ≦ 4000 mm, and the impact piece 10 has a thickness Ts of 10 mm ≦ Ts ≦ 30 mm, a length Ls of 150 mm ≦ Ls ≦ 400 mm, and a high The length Hs is 50 mm ≦ Hs ≦ 200 mm, and the number Ns (integer) of the impact pieces 10 in the circumferential group GS is 4 ≦ Ns ≦ 10. In the embodiment, Ns = 7 and Ns = 4 in the circumferential group GS (c).

  Further, in the skin cutting blade 30, the thickness Tk is set to 10 mm ≦ Tk ≦ 30 mm, the length Lk is set to 150 mm ≦ Lk ≦ 400 mm, the height Hk is set to 50 mm ≦ Hk ≦ 200 mm, The number Nk (integer) is 4 ≦ Nk ≦ 15 and Ns ≦ Nk. In the embodiment, Nk = 12.

  Therefore, when the bark of raw wood is peeled by the wood peeling device S, the raw wood is introduced from the inlet 3 of the drum 1 and the drum 1 is rotated. Since a large number of impact pieces 10 are provided in the drum 1, the raw wood flows down to the discharge port 4 side while colliding with the impact pieces 10, and the bark is peeled off by the impact pieces 10 in the flow down process. To go. Then, the treated wood and the peeled bark are discharged from the discharge port 4. In this case, the impact piece 10 is formed in a plate shape with the inclined side 13 having a corrugated shape, and its front and back surfaces are provided so as to intersect with the axial direction of the drum 1, so that the resistance is increased and the log is slipped. Since it is difficult and the residence time is long, the bark can be reliably peeled, and therefore, the peeling efficiency can be greatly improved. Further, since the front and back surfaces of the impact piece 10 are provided so as to intersect with the axial direction of the drum 1, the impact piece 10 is easily subjected to force in the direction in which the impact piece 10 falls when subjected to the impact of the raw wood. As a result, the holding strength is increased, the situation of falling down can be prevented, and the function can be secured.

  In addition, since the reinforcing piece 20 is attached to the upright side 12 of the impact piece 10, the inclined side 13 of the waveform of the impact piece 10 can easily come into contact with the surface of the raw wood, and the skinning efficiency can be further improved. . Further, since the reinforcing piece 20 is provided at a substantially right angle with respect to the impact piece 10 and the rectangular corner portion protrudes in the axial direction, the log also comes into contact with the corner portion of the reinforcing piece 20. However, the resistance increases, the residence time of the raw wood becomes longer, the bark can be peeled more reliably, and the peeling efficiency can be improved.

  Furthermore, since the circumferential group GS in which a plurality of predetermined impact pieces 10 are arranged at equal angles is arranged in the axial direction, the resistance increases, the residence time of the raw wood becomes longer, and the bark is more reliably secured. Can be peeled off, and the skinning efficiency can be improved. Further, in each axial group GJ, peeling is performed by a plurality of circumferential groups GS that make the circumferential phase of the impact piece 10 the same, but the circumferential direction of the impact piece 10 is between adjacent axial groups GJ. Therefore, when the raw wood flows down from the upstream axial group GJ to the upstream axial group GJ, the manner of collision with the impact piece 10 of the raw wood changes. The bark can be peeled off more reliably, and the peeling efficiency can be improved. In particular, since the phase of the axial group GJ is alternately shifted in the opposite direction and the phase shift width z is set to the length of the substantially base 11 of the impact piece 10, the axial group GJ having a different phase of the impact piece 10 is used. Since the raw trees are alternately collided with each other, the bark can be peeled off more reliably, and the peeling efficiency can be improved.

  In addition, on the inner surface of the drum 1 on the discharge port 4 side, a plurality of skin cutting blades 30 for cutting bark are arranged on the same inner circumference at an equal angle. However, when the peeled treated wood collides with the skin cutting blade 30, the bark between the treated wood and the skin cutting blade 30 is pressed against the skin cutting blade 30 by the treated wood. From being cut and shortened. Therefore, with the impact piece 10 alone, the bark may be peeled off without being cut, and may be continuously long, and handling may be complicated. However, the bark can be cut with the skin cutting blade 30 and thus discharged. The bark is divided, so that handling can be facilitated. Further, since the front and back surfaces of the skin cutting blade 30 intersect with the axial direction of the drum 1, the treated wood and bark can easily come into contact with the skin cutting blade 30, and the bark can be cut reliably. .

  Further, the front and back surfaces of the skin cutting blade 30 intersect the axial direction of the drum 1, the one end 31 a of the lower side 31 is located on the upper side in the rotational direction R of the drum 1, and the lower side 31 on the lower side in the rotational direction R of the drum 1. Since the other end 31b of the drum 1 is positioned, the tip of the oblique side 33 is positioned on the lower side in the rotation direction R of the drum 1 and the base end (rising side) of the oblique side 33 on the upper side in the rotation direction R of the drum 1 32) is located, the treated wood and bark can easily be placed on the oblique side 33 from the tip, and the bark can be cut reliably even at this point.

  Further, the skin cutting blade 30 is provided with one end 31 a of the lower side 31 of the skin cutting blade 30 positioned on the discharge port 4 side of the drum 1 and the other end 31 b of the lower side 31 positioned on the inlet 3 side of the drum 1. Therefore, since the tip of the oblique side 33 is located on the input port 3 side of the drum 1 and the base end (the rising side 32) of the oblique side 33 is located on the discharge port 4 side of the drum 1, the treated wood and bark are It becomes easier to be placed on the oblique side 33 from the tip, and also at this point, the bark can be cut reliably.

  In the above embodiment, the material, shape, size, number and arrangement of the impact piece 10, the reinforcing piece 20, the skin cutting blade 30 and the like are not limited to the above-described embodiments. It can be changed appropriately. In short, the present invention is not limited to the above-described embodiments, and those skilled in the art will make many changes to these illustrative embodiments without substantially departing from the novel teachings and advantages of the present invention. Many of these modifications are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Wood peeling machine 1 Drum 2 Base 3 Input port 4 Discharge port 5 Roller 10 Impact piece 11 Bottom side 11a Bottom end 11b Bottom side other end 12 Standing side 13 Inclined side 20 Reinforcement piece GS Circumferential group GJ Axial group 21 First ridge piece 22 Second ridge piece 30 Skin cutting edge 31 Lower side 31a Lower side one end 31b Lower side other end 32 Upright side 33 Diagonal side

Claims (11)

It has a drum that is rotated around the axis with respect to the base and peels off the bark of the raw wood inside, and the drum has a slot for feeding the raw wood on one end side and is peeled on the other end side. The treated wood and the peeled bark are provided with an outlet, and are provided on the base so that the inlet side is on the upper side and the outlet side is on the lower side. In the peeling machine for wood with many impact pieces that peel the bark from the raw wood,
The impact piece is formed in a substantially triangular plate shape having a bottom side to be joined to the inner surface of the drum, a rising side rising from one end of the bottom side, and an inclined side inclined from the upper end of the vertical side toward the other end of the bottom side. Forming an inclined side of the impact piece in a corrugated shape, and the impact piece has its front and back surfaces intersecting the axial direction of the drum, and one end of the bottom side is located on the upper side in the rotation direction of the drum, The wood is characterized in that the drum is provided so that the other end of the bottom side is positioned on the lower side in the rotation direction of the drum, and the impact piece is provided with a reinforcing piece that is joined to the inner surface of the drum and reinforces the impact piece. Peeling device.   The impact piece is provided so that the front and back surfaces thereof are along the rotation direction of the drum, and the reinforcing piece is a substantially rectangular plate having a height lower than the height of the impact piece and a width longer than the thickness of the impact piece. 2. The wood peeling according to claim 1, wherein the reinforcing piece has a substantially central surface joined to an upright side of the impact piece, and a lower end face of the reinforcing piece joined to an inner surface of the drum. apparatus.   3. A plurality of circumferential groups composed of a plurality of predetermined impact pieces arranged at equal angles on the same inner circumference of the drum are provided, and the circumferential groups are arranged in an axial direction. The peeling machine for wood as described.   A plurality of axial groups in which a predetermined number of the circumferential groups are arranged at predetermined intervals in the axial direction are provided, and the impact pieces that are adjacent to each other in the circumferential group that constitutes each axial group are arranged in the axial direction. The wood peeling apparatus according to claim 3, wherein the circumferential phases of the impact pieces of the axial groups adjacent to each other are shifted in the circumferential direction.   The wood peeling apparatus according to claim 4, wherein the phase of the axial group is alternately shifted in the opposite direction, and the phase shift width is set to the length of the substantially bottom side of the impact piece.   The inner diameter D of the drum is 1500 mm ≦ D ≦ 4000 mm, the thickness Ts of the impact piece is 10 mm ≦ Ts ≦ 30 mm, the length Ls of the impact piece is 150 mm ≦ Ls ≦ 400 mm, The wood peeling apparatus according to claim 5, wherein the height Hs is 50 mm ≦ Hs ≦ 200 mm, and the number Ns (integer) of impact pieces in the circumferential group is 4 ≦ Ns ≦ 10.   The peeling machine for wood according to any one of claims 1 to 6, wherein a plurality of skin cutting blades for cutting bark are provided on the inner surface of the drum.   A substantially triangular plate shape having a lower side joined to the inner surface of the drum, a rising side rising from one end of the lower side, and an oblique side inclined from the upper end of the rising side toward the other end of the lower side The upper and lower surfaces of the skin cutting blade intersect the axial direction of the drum, one end of the lower side is positioned on the upper side of the drum in the rotational direction, and the lower side of the lower side of the drum in the rotational direction of the drum. The wood peeling machine according to claim 7, wherein the other end is located.   One end of the lower side of the skin cutting blade is located on the discharge port side of the drum, the other end of the lower side is located on the inlet side of the drum, and the skin cutting blade has a front and back surface that is the shaft of the drum. The wood peeling apparatus according to claim 8, wherein the wood peeling apparatus is provided so as to intersect with each other while being inclined in a direction.   10. The wood peeling apparatus according to claim 9, wherein a plurality of the skin cutting blades are arranged at equal angles on the same inner circumference of the drum and positioned on the discharge port side of the drum. The inner diameter D of the drum is 1500 mm ≦ D ≦ 4000 mm, the thickness Ts of the impact piece is 10 mm ≦ Ts ≦ 30 mm, the length Ls of the impact piece is 150 mm ≦ Ls ≦ 400 mm, The height Hs is 50 mm ≦ Hs ≦ 200 mm, the number Ns (integer) of impact pieces in the circumferential group is 4 ≦ Ns ≦ 10,
The thickness Tk of the skin cutting blade is 10 mm ≦ Tk ≦ 30 mm, the length Lk of the skin cutting blade is 150 mm ≦ Lk ≦ 400 mm, and the height Hk of the skin cutting blade is 50 mm ≦ Hk ≦ 200 mm. The wood peeling apparatus according to claim 9 or 10, wherein the number Nk (integer) of the skin cutting blades in the circumferential direction is 4 ≦ Nk ≦ 15 and Ns ≦ Nk.

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