JPS6226169Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a device for peeling off the bark covering the surface of logs such as cedar, cypress, or Japanese larch.

In the prior art, a device in which logs are held and conveyed by a lower wheel and an upper wheel was disclosed in Japanese Patent Application Laid-open No.
58-57909, and a device for changing the moving speed of logs by adjusting the angle of the rotating surface of the conveying wheels is described in Japanese Patent Application Laid-Open No. 141209/1982.

However, in the conventional technology, when the diameter of the log changes, the operator must change the angle of the transport wheels to adjust the transport speed while observing the log.
There was a problem that the setup work was time consuming and the work could not be done efficiently.

The present invention was developed in view of these circumstances, and provides a compact bark stripping device that can arbitrarily control the feeding speed of logs according to the size of the log or the type of log. It is intended to.

In order to achieve the above object, the present invention includes a plurality of rubber wheels arranged in two rows in front and back at a predetermined interval to form a conveyance groove, a wheel drive motor for rotationally driving the rubber wheels, and a wheel drive motor for rotationally driving the rubber wheels. A presser wheel is biased downward to prevent the logs carried into the groove from bouncing up, and a presser wheel is placed above the conveyor groove to strip the bark of the logs carried into the conveyor groove and hold the logs in pressure contact with the logs from above. In the bark stripping device equipped with a cutter equipped with a control means, the rubber wheel is integrally formed with a support shaft in a direction perpendicular to the longitudinal direction of the conveying groove and a support shaft on a frame provided in the front-rear direction of the base. The shaft is mounted on a support protruding from the center of the base, and a driving motor is attached to each rubber wheel.
Further, the tips of the levers provided on each of the support shafts are pivoted and interlocked by link rods, and the link rods in the front and rear rows are interlocked so as to move in opposite directions, and the swing arm to which the cutter is attached is moved up and down. A switchbox that moves in conjunction with the reciprocating motion of the link rod is provided, and a slider that moves in conjunction with the reciprocating motion of the link rod. The control signal is supplied as a control signal, and the inclination angle of the rotating surface of the rubber wheel is changed and adjusted according to the diameter of the log, and when the diameter of the log changes, the inclination angle of the rubber wheel is changed in conjunction with this. This makes it possible to control the feeding speed of logs and perform bark stripping work efficiently.

An embodiment of the present invention will be described below based on the drawings.

In the figure, frames 2, 2 are fixed to the front and rear parts of the base 1, respectively, and each frame 2, 2 has a plurality of support shafts 3, 3, which extend in the front and rear directions, facing each other. The shafts are mounted at equal intervals.

A frame 2, 2 is attached to the inner end of each of the support shafts 3, 3.
The conveying groove 7 is formed by fixing the brackets 4, 4 along which the inner surface of the conveying groove 7 is formed, and by supporting the rubber wheels 6, 6 respectively on the supports 5, 5 which project from the brackets 4, 4 toward the center. ing.
Motors 8, 8 are attached to the supports 5, 5, respectively, and an interlocking mechanism (gear box) 9 that interlocks the output shafts of the motors 8, 8 and the rubber wheels 6, 6,
9, the rubber wheels 6, 6 are configured to be rotationally driven in the clockwise direction in FIG. 2, for example, when a drive signal is supplied to the motors 8, 8 from a control means (not shown). .

Further, levers 10, 10 are fixed to the outer ends of the respective support shafts 3, 3, and these levers 10, 10
The front end of the front row link rod 11 and the rear row link rod 11 are moved in opposite directions via an interlocking shaft 12 pivotally supported by the frames 2, 2. When the cylinder 13 that drives the rear link rod 11 is extended and moved to the right in Fig. 4, the rear link rod 11 moves to the left in Fig. 4 (to the right in Fig. 5). ). 14 is a link lever for interlocking the piston rod of the cylinder 13 with the interlocking shaft 12 and the link rod 11 in the rear row;
5 and 15 are sect gears that interlock the interlocking shaft 12 and the support shaft 3 located at the end of the front row, and the rotation direction of the front and rear support shafts 3, 3 is reversed by the sect gears 15, 15. There is.

A cutter 18 is attached to the tip of a swinging arm 16 whose middle part is pivotally connected to the center of the upper end of the rear frame so as to be able to move up and down, via a shaft 17 along the front-rear direction.
This cutter 18 and a motor 19 mounted on the upper surface of the base end of the swing arm 16 are interlocked via a chain 20. Then, the support shaft 2 of the swing arm 16
The tip (rear end) of the lever 22 fixed on the base 1
are pivotally connected via the cylinder 23, so that when the cylinder 23 is extended, the swing arm 16 rotates clockwise in FIG. 3 and lowers the cutter 18 attached to its tip. I have to.

On both sides of the swinging arm 16 mounted as described above, presser arms 25, 25, each having a presser wheel 24, 24 rotatably attached to the tip thereof, are pivotally mounted to be vertically movable. This presser arm 25,2
The tips of the arms 26, 26 extending rearward from the base 1 are pivotally connected to the base 1 via cylinders 27, 27, and when the cylinders 27, 27 are extended, the presser arms 25, 25 move as shown in FIG. The presser wheels 24 are rotated clockwise to lower the presser wheels 24, 24. Reference numerals 28 and 28 indicate guide grooves that restrict the swingable range of the presser wheel 24, and reference numerals 29 and 29 indicate wheel drive motors provided as necessary.

Further, an arm 22 fixed to the swing arm 16
The tip of the cylinder 13 and the switch box 30 are connected through a wire 31, and the piston rod of the cylinder 13 and the slider 32 are connected through a wire 33. And Switchbox 30
By arranging the slider 32 and the slider 32 to face each other, the amount of descent of the swing arm 16 (the amount of descent of the cutter 18) is made to correspond to the amount of extension of the cylinder 13.

In the above configuration, when the motors 8, 8 are operated, the rubber wheels 6, 6 are rotated, and when the motor 19 is operated, the cutter 18 is rotated. In this state, the cylinder 23 is sufficiently shortened to retract the cutter 18 upward, and the raw wood 34 is carried into the conveying groove 7 formed by the rubber wheels 6, 6, and the cylinder 27 is extended and pressed down. Lower the wheels 24, 24.
Then, the raw wood 34 carried into the conveying groove 7 is pressed down from above by the presser wheels and rotates stably as the rubber wheels 6, 6 rotate.

After the raw wood 34 in the conveyance groove 7 starts rotating in this way, the cylinder 23 is operated to extend. As a result, the cutter 18 descends and is held in pressure contact with the outer peripheral surface of the log 34, and since the cutter 8 is rotating as described above, the bark of the log 34 is peeled off by the cutter 18. .

On the other hand, when the cylinder 13 is extended, the link rods 11, 11 move in the left-right direction, and the rubber wheels 6, 6 in the front row are moved to one side in the length direction of the log 34 (for example, on the right side in FIG. 1). ), and move the rear row of rubber wheels 6, 6 to the other side in the length direction of the log 34 (for example, the left side in FIG. 1).
tilt to. As a result, the rotating surfaces of the rubber wheels 6, 6 are tilted, so that as the rubber wheels 6, 6 rotate, the log 34 is rotated, for example, in the direction of the arrow (left side) shown in FIG. moves. Moreover, this moving speed becomes faster as the inclination angle of the rotating surfaces of the rubber wheels 6, 6 becomes larger.
The amount of expansion of the cylinder 13 may be adjusted depending on the size of the log 34 or the type of log 34.

In other words, if the inclination angle of the rubber wheels 6, 6 is θ, and the diameter of the log 34 is d, the amount of movement (feed amount) L of the log 34 during one rotation of the log 34 is, if slippage is ignored, L = tanπd is given by
Then, when this feed amount L matches the width l of the cutter 18, an ideal bark stripping action with no waste is performed.

Therefore, as the diameter d of the raw wood increases, the inclination angle θ of the rotating surfaces of the rubber wheels 6, 6 increases accordingly.
By making the width smaller, the effective stripping width of the cutter 18 can be made the same regardless of the diameter of the log 34. It should be noted that the feeding speed of the log 34 (the inclination angle θ of the rotating surface of the rubber wheel 34) may be variably controlled depending on the type of the log 34, that is, depending on the difficulty of peeling off the bark. Nor.

In order to automate such adjustment of the inclination angle, in the embodiment, as described above (see FIG. 6), a switch box 30 that reciprocates in response to the amount of descent of the cutter 18 (diameter of the log 34) and a cylinder are used. The lever 35 of the switch box 30 is opposed to the slider 32 which reciprocates in response to the amount of extension of the switch box 13 (the inclination angle θ of the rotating surface of the rubber wheels 6, 6).
35, the protrusion of the slider 32 is thrust into engagement, and the output of the switch box 30 is supplied to a control means (not shown) as a cylinder control signal, thereby adjusting the feed rate (rubber) according to the diameter d of the log 34. The inclination angle θ) of the rotating surfaces of the wheels 6, 6 can be optimally controlled.

Furthermore, in the examples, both the rubber wheels and the presser wheels are made of rubber tires, but these wheels do not necessarily need to be made of rubber tires as long as they do not damage the logs and can reliably rotate the logs. do not have.

As explained above, according to the present invention, by inclining the rotating surfaces of the front and rear rows of rubber wheels by the same angle in opposite directions, the feed speed of raw wood rotating through the conveying groove formed by these rubber wheels can be adjusted at any speed. Since the feed rate can be changed to 100% depending on the size of the log or the type of the log, the feeding speed can be optimally controlled, making it possible to carry out efficient bark stripping work.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view showing the entire embodiment of the present invention, Fig. 2 is a sectional view taken along the line AA in Fig. 1 and showing the presser wheel portion, and Fig. 3 is a sectional view taken along the line BB in Fig. 1. 4 is a front view illustrating the angle adjustment mechanism of the rotating surface of the rubber wheels in the rear row, and FIG. 5 is a front view illustrating the angle adjusting mechanism of the rotating surface of the rubber wheels in the front row. 6 are configuration diagrams illustrating an automatic angle adjustment mechanism. 6... Rubber wheel, 7... Conveyance groove, 8... Motor, 13... Cylinder (angle adjustment mechanism), 18...
...Katsuta, 19...Motor, 23...Cylinder,
24... Presser wheel, 27... Cylinder, 34...
Log.

Claims (1)

[Scope of utility model registration request] A plurality of rubber wheels arranged in parallel at a predetermined interval in two rows in front and back to form a conveyance groove, a wheel drive motor for rotationally driving the rubber wheels, and a prevention of bouncing up of raw wood carried into the conveyance groove. In order to remove the bark from the logs carried into the conveyance groove, a cutter was provided with a presser wheel that was biased downward, and a cutter that was disposed above the conveyance groove and equipped with a control means to press and hold the log from above in order to peel off the bark of the logs carried into the conveyance groove. In the bark stripping device, the rubber wheels are attached to a support shaft that is perpendicular to the longitudinal direction of the conveying groove and a support that is formed integrally with the support shaft and protrudes toward the center of the base on a frame provided in the front-rear direction of the base. At the same time, a driving motor is attached to each rubber wheel, and the tip of a lever provided on each support shaft is pivoted and interlocked with a link rod, so that the link rods in the front and rear rows move in opposite directions. and a switchbox that moves in conjunction with the vertical movement of the swing arm to which the cutter is attached, and a slider that moves in conjunction with the reciprocating movement of the link rod, and these switchboxes and the slider are arranged to face each other. This bark stripping device is configured to supply the output of a switchbox to a control means as a signal for controlling a swing arm or a link rod drive means to change and adjust the inclination angle of a rotating surface of a rubber wheel according to the diameter of a log.