JPS6364283B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bark stripping machine. The purpose of the present invention is to fully automate the barking work and to strip the log without damaging the wooden part of the log by making the cutter move smoothly along the undulations of the circumferential surface of the log.

Another object of the present invention is to remove the bark of a log by bringing a rotary cutter into contact with a log rotated on a steel drive wheel. In cold regions, if the water contained in the outer skin of the log freezes, or if snow or ice is solidified around the log, or if the circumference of the log is wet with rainwater, etc., the log may slip. In many cases, the cutter may not rotate following the drive wheel mentioned above, resulting in uneven peeling or not being able to peel it at all.To avoid this, pressing the cutter strongly against the circumference of the log may cause the log to pop out. There is a risk of damage to the cutter, and since the drive wheel is made of steel and is hard, it scratches the surface of the wood after peeling, which significantly reduces its commercial value. This problem is attempted to be solved by using tires as driving wheels.

Yet another object of the invention is that hitherto known bark stripping machines are designed to move a movable frame with a rotary cutter outwardly of the base frame and parallel to the base frame. Therefore, the guide rails and movement space for the movable frame had to be maintained at all times on the outside of the foundation frame. By installing the movable frame on the foundation frame itself, the movable frame can be placed on the outside of the foundation frame. This is an attempt to solve the above-mentioned drawback of the conventional art that moving space must be maintained.

Still another object of the present invention is to allow the relative position of the cutter to the circumferential surface of the log to be easily and accurately adjusted by manual operation, and to maintain the relative position automatically in response to the ups and downs of the circumferential surface of the log. be.

This will be explained below with reference to the illustrated embodiment. The base frame a, which is rectangular in plan, has two parallel lengths and short lengths.
Horizontal frame members 3 to 6 are installed in parallel between the vertical frame members 1 and 2 of the book. A drive shaft 7 and a driven shaft 8, which are installed in parallel to each other in a perpendicular relationship to the horizontal frame members 3 to 6, are connected to bearings 9 to 12 provided in each of the horizontal frame members 3 to 6,
13 to 16, and both shafts 7 and 8
are connected by interlocking chains 17 and 18 which are connected in parallel between the chain wheels fitted therein,
When the motor 20 that interlocks the drive shaft 7 through the chain 19 is driven to rotate the drive shaft 7, the driven shaft 8 is rotated in the same direction.

Drive tires 21 are provided on both outer sides of both the shafts 7 and 8.
~24, driven tires 25~28 are fitted,
As shown in FIGS. 1 and 3, these tires 21 to 2
A log 29 is directly straddled between 4 and 25-28, and both axles 7, 8, that is, both tires 21-24, 2
When 5 to 28 are rotated, the log 29 is rotated in a predetermined direction.

The movable frame b, which has the upper frame member 32 installed on the upper end portions of the left and right frame members 30 and 31, is a base frame a.
It is movably suspended on the side.

That is, wheels 37 fitted on shafts 35, 36 rotatably supported by bracket bearings 33, 34 attached to the outside of the left and right frame members 30, 31,
38 is mounted on the rail 39 laid on the vertical frame member 1, and the wheels 37 and 38 are driven by a drive mechanism (not shown) in the cover 40 provided under the movable frame b. By rotating, the movable frame b moves along the side surface of the base frame a. In addition, the horizontal rotating wheels 41 and 42 attached to the lower ends of the left and right frame members 30 and 31 of the movable frame b are connected to the rails 39
At the bottom of the base frame body a, a horizontal rotating wheel 45 attached to an arm piece 44 fixed to the cover 40 is brought into contact with the outer surface of an auxiliary rail 43 having an inverted concave shape attached to the side surface of the base frame a, and a horizontal rotating wheel 45 attached to an arm piece 44 fixed to the cover 40 is brought into contact with the inner surface of the auxiliary rail 43. (see Figures 1 and 3) to prevent the movable frame b from coming off the base frame a.

As mentioned above, the movable frame body b has the rail 3
9 and 43 are attached to one side of the foundation frame a and movably suspended thereon, for example, they can be made to span between the vertical frame members 1 and 2 of the foundation frame a. It suffices if the foundation frame a itself is constructed so that it can move parallel to the length direction of the log, and by doing so, a separate rail can be laid outside of the foundation frame as in the past, and the above-mentioned movable This eliminates the drawbacks of the frame-mounted type.

The support frame c mounted between the left and right side frame members 30 and 31 of the movable frame b has a chain 48 wound around a chain wheel 47 of a reducer 46 installed on the upper frame member 32 of the movable frame b. When the motor 49 is driven to rotate the wheel 47 in the normal direction, the support frame c is pulled up, and when the wheel 47 is reversed, it is lowered by its own weight, and this support frame c moves up and down guided by the left and right frame members 30 and 31 of the movable frame b, and can be stopped at any position by stopping the motor 49.

The upper ends of the rotating plate pieces 52', 52'' are rotatably attached to a shaft 52 supported by bearings 50, 51 fixed on both sides of the support frame c, and the rotating plate pieces 52', 5
2'', an arm body d consisting of a front arm d' that projects forward and a rear arm d'' that projects rearward of the support frame c is installed, and a bearing 53, A support shaft 55 is rotatably mounted on the support shaft 54, and a holding plate 5 is attached to the front end of the support shaft 55.
6 is fixed.

This holding plate 56 is slightly inclined with the rear end facing downward and the front end facing upward, and has a front arm on its rear side.
The lower ends of balance holders 58 and 59, whose upper ends are pivotally supported, are supported on an upright plate 57 provided at the front end of d'. The balance holders 58 and 59 have cylinders 58a and 59a slidably fitted with cylinders 58b and 59b having a smaller diameter, and a coil spring (see FIG. (not shown), and when the holding plate 56 tilts to one side about the support shaft 55, the balance holding body 5
8, 59 contracts and the other expands, but it returns to its original position due to the action of the spring, and the retaining plate 56
It is intended to bring the balance into equilibrium.

A cutter 62 rotatably mounted between bearings 60 and 61 provided on both sides of the holding plate 56 is positioned above the tires 21 to 24 and 25 to 28, and a cutter 62 is provided around the cutter 62. The lower side of the blade tip rotation locus of the many protruding blades 63 is set to coincide with the axial extension of the support shaft 55, and the upper side projects upward from the front hole 64 of the holding plate 56. And this cutter 62
is the motor 65 mounted on the rear arm d″.
is connected to the motor 6 through a chain 66.
5 to rotate the cutter 62.

At the rear end of the rear arm d'', a mounting piece 69 for mounting chain wheels 67 and 68 in front and back is installed, and the mounting piece 69 is mounted on the upper end of an upright member 70 provided on the upper side of the support frame c. A chain 72 is mounted between a freely erected chain wheel 71 and the chain wheels 67 and 68.

That is, one side of the chain 72 wound around the chain wheel 71 is wrapped around the rear circumference of the chain wheel 68 and led out from the lower circumference thereof, and the lead-out part is wrapped around the upper circumference of the chain wheel 67. It hangs downward,
The other end of this chain 72 is connected to the mounting piece 6 at one end.
It is connected to the other end of a tension spring 73 attached to 9. And the chain wheels 67, 6
8, 71, chain 72, and tension spring 73 constitute an adjustment mechanism.

The arm body d has its center of gravity on the rear side and cannot be rotated as a whole in the counterclockwise direction in FIG. 1 due to the weight of the motor 65 etc. installed therein. 72 and a tension spring 73.

That is, if the restriction pin 74 inserted between the teeth of the chain wheel 67 to prevent its rotation is pulled out and the chain 72 is pulled in the direction of the arrow 75 in FIG. 1, the arm body d will be rotated clockwise. This state is maintained by inserting the regulating pin 74 again when the required force is obtained. Reference numeral 76 denotes a stopper (Fig. 1) provided on the support frame c, which prevents the arm part d from rotating in the clockwise direction, and remains in that position and becomes operational. In this state, As shown in FIG. 1, the front side portion of the front arm d' that projects forward from the movable frame b is held in a slightly inclined relationship so that its front end is directed downward.

Now, the log 29 is straddled between the tires 21 to 24 and 25 to 28, and its axis is aligned with the above two shafts 7 and 8.
After setting the arm body d in a position where the rotation locus of the cutting edge of the cutter 62 touches the boundary between the woody part 29a of the log 29 and its bark part 29b, both tires 21- 28 to rotate the log 29 and its tire in the opposite direction, and rotate the cutter 62 in the opposite direction to the log 29, that is, in the same direction as the tire, and move the movable frame b to rotate the cutter 62 in the opposite direction to the log 29. When the cutter 6 is gradually moved from one end of the 29 to the other end, the cutter 6
2, the bark portion 29b is scraped off.

At this time, even if there are undulations around the log 29, the cutter 62 sensitively senses the undulations and swings left and right or up and down along the undulations.

That is, if a force is applied to swing the cutter 62 from side to side due to the ups and downs of the log 29, the cutter 62 will move along with the support shaft 5 along with the holding plate 56.
5, and after passing through the undulations, a force is applied to immediately return to the original position by the action of the balance holders 58 and 59, and it is sensitive to the next undulations. In this case, instead of aligning the lower side of the rotation locus of the cutting edge of the cutter 62 with the extension of the axis of the support shaft 55, for example, the cutter 62 may be set so that its rotation locus is below the axis. It has been found from experimental results that the cutter 62 is not sensitive to the ups and downs of the log 29.

Therefore, it is an essential requirement of the present bark stripping machine that the lower side of the rotation locus of the cutting edge of the cutter 62 coincides with the extension of the axis of the support shaft 55.

Furthermore, when a force is applied to push the cutter 62 upward due to the undulations of the log 29, the arm body d rotates counterclockwise in FIG. 1 about the shaft 52 against the tension spring 73, and When it passes through, the tension spring 73 applies a force to move it downward and return it to its original position. In this way, the arm body d, which rotates according to the ups and downs of the log 29, has its center of gravity on the rear side as described above, and is maintained in the operating state by the tension of the tension spring 73 of the adjustment mechanism. If a force that overcomes the tensile force is applied, it will immediately rotate, and if the tensile force of the spring 73 is adjusted appropriately by pulling the chain 72 according to the hardness of the bark, the hardness of the bark will change. It can also be dealt with.

As described above, the cutter 62 can swing left and right and up and down, so these movements are combined to smoothly move around the circumferential surface of the log 29 and accurately cut away the wooden part 29a without damaging it. be.

In the above embodiment, the balance holders 58, 59
are constructed by interposing springs in their cylindrical bodies, but it is clear that hydraulic pressure or the like may be used in place of the springs, or a combination of both springs and hydraulic pressures may be used.

In addition, 77 in the figure is the upper frame member 3 of the movable frame b.
This is an auxiliary guide roller installed between the plates 78 and 79 provided at 2, and is used to reinforce the upright member 70 so that it can sufficiently withstand even if a force is applied to the upright member 70 that causes it to fall backwards or oscillate laterally. .

As is clear from the above description, the bark stripping machine of the present invention places the center of gravity of the arm body supported by the support frame body mounted on the movable frame body so as to be movable up and down, to the rear of its support point. A relationship in which the front end of the arm body facing the log is rotated in a direction away from the log, and the rotation locus of the cutting edge coincides with the support shaft of the front end of the arm body on the extension of the axis of the support shaft. a cutter that has been tilted, and a balance holder that maintains the cutter in equilibrium and returns it to its original position when it is tilted; The chain mounted between the chain wheels mounted on the rear end of the chain is connected to the rear end of the arm body through a tension spring at one end of the side of the upright member that is wound around the chain wheel. , and the chain wheel at the rear end of the arm body around which the other end is wound is equipped with a regulating pin, so the arm body resists the rotational force due to its own weight and holds the cutter in the position where it contacts the log. Moreover, when a force is applied to the cutter to push it up, the chain is extended to allow the arm body to rotate in the direction in which the cutter rises. It can be swung up and down, making it possible to peel off the bark of the log smoothly and accurately, without damaging the woody part of the log, making the process ideal for removing the bark. It's watery.

Further, since the bark stripping machine of the present invention directly supports the log with tires, there is no risk of damaging the surface of the wooden part after barking due to the support means, and there is no reduction in the commercial value of the tree. Even when the skin is wet with rainwater or its skin is frozen, there is no risk of it slipping, and therefore it can rotate at high speed along with the tire and perform the prescribed peeling work efficiently.

Furthermore, since the bark stripping machine of the present invention has the movable frame mounted on the foundation frame, in other words, the movable frame is not separately laid outside the foundation frame as in the past, the movable frame is installed on the foundation. Logs from which the bark has been peeled can be stacked one after another around the frame, but unlike conventional methods, the logs from which the bark has been peeled must be moved to separate positions where they will not interfere with the movement of the movable frame. This completely eliminates the problem and helps improve work efficiency.

Moreover, in the bark stripping machine of the present invention, the stopper for restricting the rotation in the opposite direction to the rotation due to the arm body's own weight, that is, the rotation in the direction of bringing the cutter into contact with the log, within a predetermined range is attached to the support frame. Because the cutter is provided in
Therefore, the cutter can be maintained at the required setting position, and the desired peeling work can be performed smoothly.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a plan view, FIG. 3 is a rear view, and FIG. 4 is a perspective view of the front arm. 29... Log, a... Foundation frame, b... Movable frame, c... Support frame, d... Arm body, 55...
... Support shaft, 62 ... Cutter, 58, 59 ... Balance holder, 67, 68, 71 ... Chain wheel, 72 ... Chain, 73 ... Tension spring, 76
...stopper.

Claims (1)

[Claims] 1. Fit a driving tire and a driven tire facing each other onto a driving shaft and a driven shaft that are installed in parallel with a required spacing, and
The log is directly mounted on the base frame with the log straddling the log with its axis parallel to both axes, and rotates the log in the opposite direction to both tires as the tires rotate. A movable frame body that moves parallel to the length direction is installed, and the arm body is supported in a relationship substantially orthogonal to the log on the support frame body that is mounted so as to be vertically movable with respect to the movable frame body. At the same time, the center of gravity of the arm body is placed rearward from its support point, and the arm body itself is rotated so that the front end facing the log rotates in a direction away from the log, and the front end of the arm body rotates toward the front end of the arm body. A cutter is directly or indirectly mounted on a freely provided support shaft in such a manner that the rotation locus of its cutting edge coincides with the extension of the axis of the support shaft, and the cutter is held in equilibrium and when it is tilted. A balance holder is provided that acts to return the body to its original position, and a chain is mounted between a chain wheel that is mounted on an upright member provided on the support frame and a rear end of the arm body. A tension spring is stretched between one end of the chain on the upright member on the side wound around the chain wheel and the rear end of the arm part, and an arm part around which the other end of the chain is wound. The chain wheel at the rear end of the body is equipped with a regulating pin for regulating its rotation, and the arm body is also prevented from rotating by the tensile force of the tension spring, that is, in the direction of bringing the cutter into contact with the log. A bark peeling machine characterized in that a stopper is provided on the support frame to restrict the range to a predetermined range.