JPS6058001B2 - Log support centering device in rotary race - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a log support centering device for a rotary race.

Conventionally, in rotary laces that continuously cut veneers from logs, the material logs are centered and clamped to the center of the rotary lace's log support spindle, but the process of centering the material logs is very troublesome. The centering of the rotary lace is done artificially using a ruler, or recently, a large number of concentric circles and radial lines are placed on both sides of the centering position of the log in front of the rotary lace. A matching appropriate centering target is projected with a magic lantern, and the log supporting and holding device that supports and holds the log at the log centering position is appropriately operated to adapt both end surfaces of the log to the targets, respectively, and centering is performed. However, in any case, there was no log supporting and holding device that could properly and smoothly adjust both ends of the log in the vertical and longitudinal directions, making it easy to accurately center the log. It could not be expected to be carried out easily, quickly and safely, and this had become a major bottleneck in improving the efficiency, labor-saving, and safety of continuous veneer cutting.

In view of the above, the present invention provides a log support centering device as described below to solve the conventional drawbacks and problems.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The log support centering device of the present invention will be described with reference to drawing examples.

Reference numeral 1 is an expansion-type lifting device with a cross link LC, and by the operation of a cylinder 2 (located in the center above the base lb), the lifting plate 1a always maintains a horizontal state parallel to the base 1. It moves up and down.

Reference numerals 3 and 3 denote longitudinal guide rails provided at appropriate intervals on the elevator platform 1a, and wheels 5, 5 are attached to the guide rails 3, 3.
A running frame 4 is constructed so that it can freely run forward and backward.

The traveling frame 4 can travel forward and backward by the operation of a cylinder 4a attached to the outer surface of one of the guide rails 3. Reference numeral 6 denotes a movable frame on which grooved front and rear support rollers 8, 8 are mounted, which support the end of the log 25 and can rotate and displace the log 25 as appropriate by rotational drive. Support shafts 13 protruding on both front and rear sides are inserted into guide tubes 12 provided on both front and rear sides of the upper surface of the traveling frame 4 so as to be slidable up and down, respectively.
can be moved up and down by a cylinder 7 provided at the center of the traveling frame 4.

In other words, the movable frame 6 is the cylinder 7.
It can move up and down by the cylinder 4a, and can move back and forth together with the traveling frame 4 by the cylinder 4a. The front and rear support rollers 8, 8 have shaft portions 8a mounted on both front and rear sides of the movable frame 6, respectively, with bearings 9, 9.
is supported and rotatably mounted on both shaft portions 8a, 8a.
A control chain is connected between the chain wheels 11 and 11 which are respectively fixed to the motor 10 which is directly connected to one of the shaft parts 8a.
, the front and rear support rollers 8, 8 rotate in the same direction. Therefore, the movable frame 6 having the above-mentioned structure, which can be moved back and forth as well as up and down, is arranged with the lifting device 1 fixed on both the left and right sides below the log centering position P in front of the rotary race 14, and Movable frame 6
The log 25 is supported at both ends by the front and rear supporting rollers 8,8. 16 is the left and right movable frame 6
The left and right transition frames 16 are provided on both the left and right sides, which can move toward and away from the left and right end surfaces of the log 25 supported by the support terminals 8, 8, respectively. 17 rolls on a rail 18 so that it can be moved left and right on the center line of the left and right movable frame 6.

And the above left/right transition frame! The opposing inner surfaces of the frame 16,
That is, on the surface opposite to the end surface of the log 25, there are four pieces that can move forward and backward in the centripetal direction from all directions along vertical and horizontal lines 1 and m that are perpendicular to each other at the center point 0, which is at the same level as the log support spindle 15 of the rotary race 14. Log detectors such as phototubes! 2
3a, 23b, 24a, and 24b are provided, respectively.
That is, in the embodiment of the drawing, as shown in FIG. vessel 23a,
23b is attached 1, and the adjusting chain 22 is entwined between the left and right chain wheels 21, 21 mounted on both left and right ends on the same horizontal line m,
Log sensors 24a and 24b are installed on the left and right sides of the chain 22, respectively. And the log detector 23a, 23
b, 24a, and 24b are each always located at the same distance from the center point 0, and each moves toward the center point 0 by forward and reverse rotation of the chain 20 and chain 22 driven by one of the chain wheels 19 and 21. They are configured to simultaneously move at a constant speed in the centripetal direction, or conversely to move simultaneously at a constant speed in radial directions moving away from the center point 0. In the above case, the movement of the upper and lower log detectors 23a and 23b along the vertical line 1 and the movement of the left and right log detectors 24a and 24b along the horizontal line m can be performed separately. be. Furthermore, left and right transition frame 16
The robots can be automatically moved to the left or right as needed by operating a switch. The log sensors 23a, 23b, 24a, and 24b detect the log 25 and send electrical signals, and include, for example, a reflective phototube as in the embodiment, a limit switch, a non-contact switch, and an ultrasonic sensor. Electrical or mechanical sensing switches such as switches, laser beam switches, etc. can be used. Further, the log sensor 23a is configured to operate at a position where the transition frame 16 moves toward the end surface of the log 25 and is close thereto. However, in this invention, the movable frame 6 is appropriately raised and lowered or moved back and forth in response to the sensing action of each log sensor based on the irregular shape of the outer circumference of the log 25, thereby automatically aligning the log 25. It is configured. That is, as described above, the movable frame 6 moves in the centripetal direction when the upper log sensor 23a senses the log, and when the lower log sensor 23b senses the log, the movable frame 6 moves up and moves toward the left log. Sensor 24a
The movable frame 6 moves forward when the detector 24b detects the log, and the movable frame 6 moves forward when the right log detector 24b detects the log.
The cylinders 7 and 4a are respectively engaged with switching valves such as directional control valves so that the cylinders 7 and 4a move backward. Reference numeral 26 denotes a log clamping and conveying device that can run back and forth on an overhead traveling rail 27, and the log 25 can be conveyed to the rotary race 14 by clamping both ends thereof with clamping clamps 28, 28. Next, the operating state of this invention device will be explained.

First, as shown in the figure, the raw wood 25 is automatically conveyed and placed on the front and rear supporting rollers 8, 8 of the movable frame 6 on both left and right sides below the log centering position P, with both ends supported.

Therefore, the log 25 placed on each of the bearing rollers 8, 8 is rotated appropriately by driving the bearing rollers 8, 8, and
Looking at the deformation of the outer periphery, as shown in FIG.
25e, the log recesses 25c and 25d are the virtual perfect circle 25a.
Rough centering is performed in advance by placing it in a stable position so that it is on a vertical line or horizontal line passing through the center. Next, the left/right transition frame 16 is moved to a position close to the end face of the log 25 (the position indicated by the chain line in FIG. 1).
In this case, the center point 0 of the transition frame 16 is the log 2
It is designed to approximately coincide with the center of the virtual perfect circle 25a of the fifth end face. Therefore, in FIG. 5a, the upper and lower log sensors 23a and 23b are moved centripetally from the solid line position along the vertical line 1 toward the center point 0, respectively, and come to the dashed line position in FIG. Then, the upper log sensor 23a detects log 2.
5, the cylinder 7 is immediately actuated by an electric signal to lower the movable frame 6. Then, the movable frame 6 is lowered by a distance ■, and the upper and lower log detectors 2 are lowered as shown in FIG.
3a and 23b are in contact with the upper and lower outer peripheral edges of the end surface of the log 25, respectively,
And when both of them are in a state where there is no sensing effect, the log 25
is the center point 0 in Fig. 5b, which is displaced upward by a distance ■ from the initial center point 0'' (in the case of Fig. 5a).In this way, the vertical and vertical directions of the log 25 are Once the alignment in the direction has been performed and the center has been determined as the center point 0 position in Fig. 5c, the next step is to align the log 25 in the left and right directions.That is, in Fig. 5c. , the left and right log sensors 24a and 24b are moved in a centripetal direction from the solid line position along the horizontal line m toward the center point 0, respectively.
When it reaches the chain line position, the right log detector 24b acts on the log protrusion 25e on the right outer periphery of the log 25, so it immediately activates the cylinder 4a by an electric signal and moves the movable frame 6 backward ( (in the direction of the arrow in Fig. 5c). Then, the movable frame 6 is laterally displaced backward by a distance H, and as shown in FIG. 5d, the left and right log sensors 24a,
When 24b is in contact with the left and right outer circumferential edges of the end face of the log 25, and both are in a state where no sensing action occurs, the core of the log 25 is a distance H from the initial center point 0'' (in the case of Figure 5 c). Center point 0 displaced forward (rightward in Figure 5 c)
This is the result. In this way, alignment in the longitudinal and lateral directions is also performed, and the center point 0 position in FIG. 5d is determined as the accurate core of the log 25. In other words, upper and lower log sensor 2
By moving the left and right log sensors 3a, 23b and the left and right log sensors 24a, 24b in the centripetal direction, centering can be performed by automatic alignment in the vertical and vertical directions and in the horizontal and vertical directions based on the irregular shape of the outer circumference of the log 25. It is possible. In FIG. 5b, the upper and lower log sensors 23a and 23b move further in the centripetal direction from the solid line position and stop at the chain line position, and in FIG. 5d, the left and right log sensors 24a and 24b move from the solid line position further. They move in the centripetal direction and stop at the dashed line position, but at this time, they are designed so that they do not sense each other.
After centering is performed as described above, the log 25 is clamped and transported to the rotary race 14 side by the log clamping and conveying device 26, and the core is transferred to the log support spindle 1.
5 is held and clamped. Incidentally, although the vertical movement as well as the forward and backward movements of the movable frame 6 are performed by cylinder operation in the illustrated embodiment, they may be performed by other power mechanisms such as electric power, and each log sensor 23a, 23b
, 24a, 24b can also be moved by any drive device. Since this invention device is configured as described above, the log 25 placed on the front and rear support rollers 8, 8 of the left and right movable frame 6 is rotationally displaced by the rotational drive of the support rollers 8, 8. Rough centering is automatically performed by looking at the outer shape of the log 25, and after that, the left and right transition frames 16 are moved.
Four Hara/Ki detectors 23a, 23b, 24 equipped with
By moving a and 24b in the centripetal direction, accurate centering adjustment can be performed quickly and safely through self-alignment in the vertical and vertical directions as well as in the front and rear horizontal directions, contributing to efficiency and labor savings in continuous cutting of veneer. In addition, it has outstanding effects such as being able to contribute to the prevention of accidents and disasters near the rotary race and to improving the yield rate of veneer manufacturing.

In particular, in this invention, vertical and horizontal lines 1 orthogonal at the center point 0
, m, using four log sensors 23a, 23b, 24noA, 24b that can move forward and backward in the centripetal direction from all directions,
Since the movable frame 6 is moved up and down or back and forth as appropriate in response to the sensing action of each log sensor based on the irregular shape of the outer circumference of the log 25, automatic alignment of the log 25 is performed.
The sensor works sensitively on any irregularly shaped logs 25 with irregular outer circumferences, allowing automatic alignment in the vertical and vertical directions and in the front and back horizontal directions to be performed accurately and rationally, making it possible to reliably and easily adjust the centering of the logs. It has a positive effect.

[Brief explanation of drawings]

The drawings show an embodiment of the device according to the invention, and FIG. 1 is a partially longitudinal front view of the main part, FIG. 2 is a partially longitudinal side view of the same, FIG. 3 is a front view of the transition frame, and FIG. 5 is a side view of the entire device, and FIGS. 5A, b, c, and d are explanatory diagrams showing the state of each stage when the log detector automatically aligns the log in the vertical and longitudinal directions. It is. 1... Elevating device, 1a... Elevating board, 1
b...Foundation, 1c...Cross link,
2... Cylinder, 3... Guide track, 4
...... Traveling frame, 4a... Cylinder, 5.
...Single wheel, 6...Movable frame, 7...
...Cylinder, 8...Bearing trochanter, 8a.
...Shaft part, 9...Bearing, 10...
・Motor, 11...Chain wheel, 12...
Guide cylinder, 13... Support shaft, 14... Rotary race, 15... Log support spindle, 16
...Transition frame, 17...Wheel, 1
8...Rail, 19...Chain wheel, 20...
・Chain chain, 21 ・Chain wheel, 22...Chin chain, 23a, 23
b, 24a, 24b...Log detector, 25...
... Log, 25a ... Virtual perfect circle, 25b, 2
5e... Log convex part, 25c, 25d...
・Log recess, 26...Log holding and conveying device, 27...
... Ceiling running rail, 28 ... Holding clamp, 1 ... Vertical line, m ... Horizontal line, 0,0
″,0″・・・Center point, H, V・・・Distance, P・・・Log centering position.

Claims (1)

[Claims] 1. A movable frame 6, which can be moved back and forth as well as up and down, is equipped with front and rear support rollers 8, 8 that support the ends of the logs 25 and can rotate and displace the logs 25 as appropriate through rotational drive. Log centering position P in front of race 14
The transition frames 16 on both the left and right sides are arranged on the left and right sides of the lower part, and can move forward and backward in the left and right directions, and can move toward and away from both end surfaces of the raw wood 25 supported by the support rollers 8, 8 of the left and right movable frame 6, respectively. , vertical and horizontal lines l orthogonal at the center point O at the same level as the log support spindle 15 of the rotary race 14,
Four log sensors 23a, 23b, 24a, and 24b such as phototubes that can move forward and backward in the centripetal direction from all directions along the length m are provided respectively, and the sensing action of each of the log sensors based on the irregular shape of the outer circumference of the log 25 is A log support centering device for a rotary race, characterized in that the movable frame 6 is raised and lowered or moved back and forth as appropriate to automatically align the log 25.