JPS6153924B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic feed fork in a sawmill.

Efforts have been made to automate and improve the efficiency of sawmilling machines. As is well known, logs sawn to a certain thickness have varying widths and ears on one or both sides. In order to efficiently saw sawn timber products of a certain width from such sawn timber, it is necessary to sort the sawn timber into those with both ends and those with one end, and to determine the width of the sawn products that can be made from them. It was necessary to sort by. Such sorting required additional time and space, increasing the cost of the lumber operation. In addition, when sawn sawn timber containing a mixture of sawn timber with one ear and two ears having various widths as described above is to be sawn while changing the product dimensions one by one, it is necessary to After setting the dimensions of a sawn product to be obtained from a single piece of lumber, the lumber is transversely fed to a predetermined position along the feed path of a lumber machine by hand or skid, etc., and then the cutting process begins. After that was completed, it was common to repeat the process with the next piece. In this case, a lot of time is required for setup before starting the cutting process, and a reduction in the actual cutting time is unavoidable.

In order to improve this drawback, the dimensions of the product are set in advance outside the feed path of the sawmill, and after the material is fed onto the feed path of the sawmill, the ruler on the sawmill is adjusted according to the previously set dimensions. A method of automating the setting has been considered, but the material feeding method is not perfect, making it complicated to accurately position the material on the material feed path of the sawmill.

The present invention aims to eliminate the above-mentioned drawbacks of the prior art, and includes providing means for providing a virtual saw core on a plane spaced apart from the saw core plane by a predetermined distance outside the feed path of the sawmill; After setting the product dimensions for one piece of material with respect to the virtual saw core using an auxiliary ruler and storing this set value in the microcomputer, the material is accurately fed horizontally onto the material feeding path of the sawmill. The ruler of the lumber machine is moved in accordance with the stored set dimensions to accurately position the lumber, and then the lumber is cut. During the above process, the setting of the dimensions of the subsequent material, its storage and material supply can be partially overlapped, thereby increasing the actual cutting time.

The present invention will be described in detail below with reference to the drawings showing one embodiment of the present invention.

FIG. 1 shows a sawmill 10 and sawn material conveying means 2.
0 is a plan view of an automatic material feeding fork of the present invention having a material feeding means 30 and a cutting dimension setting means 40 for setting product dimensions in advance on the side of the material feeding path of a sawmill.

The sawmill 10 includes a band saw 11, a ruler 12, and a material feeding path 1.
Contains 3. The sawn material conveying means 20 includes, for example, a pair of chain conveyors 21, 21', which are arranged generally at right angles to the material feed path of the sawmill and which are parallel to the material feed path. Closely terminated.

The material feeding means 30 includes two pairs of fork members 31e,
It has a fork means having 31e', 32e and 32e', a horizontal reciprocating means for reciprocating the fork means in the horizontal direction, and a vertical reciprocating means for reciprocating the fork means in the vertical direction.

The horizontal reciprocating means includes a rotating shaft 35 disposed generally parallel to the material feeding path of the sawmill, a reversible rotary motor 34 that drives the rotating shaft 35 in forward and reverse rotation, and one end of each of the rotating shafts 35 extending in the axial direction. A first pair of rotating arms 36, 36' are fixed apart from each other and have their other ends extending parallel to each other; and the other end of each is 180 degrees relative to the first pair of pivot arms.
a second pair of pivoting arms 37, 37' extending parallel to each other in an angular arrangement of degrees, and one end of each pivoted to the free end of the first pair of pivoting arms 36, 36', respectively; a first pair of link arms 38, 38' whose respective other ends extend toward the material feeding path above the rotating shaft 35; and a second pair of pivot arms 37, whose respective one ends extend toward the material feeding path a second pair of link arms 3 which are each pivotally connected to the free ends of 37' and whose respective other ends extend toward the material feed path below the rotation axis 35;
9, 39' and a horizontal guide means 33 (a first
a first pair of driven means 31, 31' guided on (not shown in the figures), each supporting a first pair of fork members 31e, 31e'; horizontal guide means 3 arranged in
3 and a second pair of fork members 32
e, 32e', respectively. In the illustrated embodiment, horizontal guide means 33 and driven means 31,3
1', 32, 32' are shown as rails and carts running on them. Reversible rotation motor 34
can be, for example, a geared motor with a brake.

FIG. 2 is an elevational view of the devices shown in FIG.
To simplify the drawing, some of the elements shown in FIG. 1 have been omitted, and elements not shown in FIG. 1 have been added.

As can be clearly seen in FIG.
They extend in opposite directions through an angle of 180 degrees, and they rotate alternately clockwise and counterclockwise through an angle of 180 degrees, as shown by arrow A. The link arm 38 connects the rotating arm 36 and the driven means 31
Both ends are pivotally connected to the link arm 3.
9 is pivotally connected at both ends to the rotating arm 37 and the driven means 32, respectively. Rotating arms 36', 37' and link arms 38', 39' disposed on the other side of the chain conveyor are constructed in the same manner as described above.

The driven means 31, 31', 32, 32' have substantially similar construction. Therefore, one of them will be explained in detail.

The driven means 31 includes four pairs of rollers 31a, 31
a', 31b, 31b', 31c, 31c', 31d,
31d' to run on the guide means 33;
supported on the guide means. On the driven means 31, a fork member 31e is synchronously moved with the paired fork member by a vertically reciprocating means.
It is supported to reciprocate between predetermined levels.

The vertical reciprocating means includes a drive means 31f such as an air cylinder, and detection means (for example, limit switches) LSa and LSb that detect the upper and lower limit positions of the level of the fork member 31e. Techniques for using these to synchronize a pair of fork members are well known and therefore will not be described in detail.

The product size setting means 40 includes a virtual saw core display device 41 that displays a virtual saw core on a plane separated from the saw core plane of the band saw 11 by a predetermined distance, for example, the maximum travel distance of the driven means, and a pair of auxiliary rulers 42; 43. These auxiliary rulers can be moved left and right by the operator both individually and in synchronization. The virtual saw core display means 41 may be, for example, a laser beam projector.

Since the configuration of the device of the present application has been described in detail above, the operation mode of the device of the present application will be described in detail below.

As shown in FIGS. 1 and 2, the pair of driven means 31, 31' is in the second position (the position where the sawn material is transferred to the sawmill).
2 and 32' are stopped at the first position (position for receiving the sawn material onto the pair of fork members). The respective fork members 31e, 31e', 32e, 3 provided on these two pairs of driven means
2e' are each lowered to the lower limit position.
The sawn material W is processed by the chain conveyors 21, 21'.
1, W2... are continuously conveyed, and the following materials are stopped by means not shown, and the leading material W1 is moved to the fork member of the pair of driven means in the first position. move it upwards. When the auxiliary rulers 42 and 43 are operated by the operator to set the cutting dimension with respect to the virtual saw core (laser mark) given from the virtual saw core display means 41, the set value is transferred to the microcomputer (not shown). ). The storage of settings in a microcomputer is well known in the art and will therefore not be described in detail.

Fork members 32e, 32e' provided on the driven means 32, 32' are connected to the respective air cylinders 32.
f and 32f', it is raised to the position shown by the two-dot chain line in FIG. At this time, the upper limit position detection means LSa operates to operate the geared motor 34 with a brake and rotate the rotating shaft 35 counterclockwise.
Rotate 180 degrees. The driven means 32, 32' are moved from the first position to the second position by the link arms 39, 39', and in this case, the rotation movement of the pivot arms 37, 37' causes the link arms 3
Since it is returned to linear motion by 9,39',
The horizontal speed of movement of the driven means is zero at its start and end points and equal to the circumferential speed of the pivoting arms 39, 39' in the middle. Specifically, the horizontal movement speed starts from 0, accelerates very slowly, gradually increases the acceleration, reaches the maximum when the rotating arms 37, 37' rotate 90 degrees, and follows the reverse process. When will it become 0 again? Thus,
Even if the motor 34 is abruptly stopped by the brake at the end of the movement, the material placed on the fork member will not shift during the movement. When the driven means 32, 32' stop at the second position, the detection means LS1, such as a limit switch, detects that there is no material on the material feeding path 13, and the fork members of the driven means 32, 32' are stopped. 32e, 32e' are lowered to accurately place the material relative to the saw core.

During the above operation, the driven means 31, 31' are simultaneously moved from the second position to the first position in a reverse manner.

When the driven means 32 leaves the first position,
The next material W2 can be fed into the sizing position. The same operation as described above is performed by the driven means 31, 31'. At this time, unless the lower limit position detection means LSb confirms that the fork member of the driven means in the second position is at the lower limit position, the geared motor with brake 34 is not started.

The microcomputer stores settings for up to four pieces of material. namely, the material being cut, the material waiting on the material transport path, the material supported by the fork members in the raised position of the pair of driven means that have left the first position, and the material in the sizing position. or a member supported on the fork member of the driven means in the first position.

The ruler on the sawmill is automatically moved by an operator or a microcomputer according to the set dimensions set for each of the above-mentioned materials. To be more specific, in the first aspect, the display position of the virtual saw core is separated from the saw core of the sawmill by a distance corresponding to the moving distance of the driven means on the guide means, and the auxiliary ruler is set apart from the saw core of the sawmill. The operator sets the cutting dimensions by moving the virtual saw core, and at an appropriate timing before the sawn material with the set cutting dimensions is cut, the operator adjusts the sawmill's ruler to the set dimensions. Move according to. In the second aspect, an identification number is assigned to each of the four pieces of lumber W1 to W4 described above, a setting value associated with each lumber is stored in a microcomputer, and the lumber is activated at an appropriate timing. A microcomputer issues commands to move the sawmill's ruler relative to the saw core according to the set value. Such operations are commonly used in computer control of various mechanical devices and need no further detailed explanation.

Cycle operation can be performed by setting the operation of the driven means at a fixed time; in the example, material feeding to the sizing position is carried out every 8 seconds, and the driven means is operated in a cycle of 16 seconds. I was able to do that.

As described above, in the automatic material feeding fork according to the present invention, the driven means is started by connecting the rotating arm that reversibly rotates through an angle of 180 degrees and the driven means through a link arm. , there is no shock when stopping, and the material is incrementally accelerated and decelerated during the stop, making it possible to accurately cross-feed the material.Furthermore, by moving the two pairs of fork members three-dimensionally, it is extremely efficient. Materials can be supplied to

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of a lumber system including an automatic lumber feeding fork of the present invention, and FIG. 2 is an elevational view of the lumber system shown in FIG. Explanation of symbols, 10: Sawmill, 11: Band saw, 1
2: ruler, 13: material feeding path, 20: sawn material conveying means, 21, 21': chain conveyor, 30: material feeding means, 31, 31': driven means, 31a, 3
1a', 31b, 31b', 31c, 31c', 31
d, 31d': roller, 32, 32': driven means, 32e, 32e': fork member, 32f, 3
2f': Vertical reciprocating means (air cylinder), 3
3: Guide means, 34: Drive motor, 35: Rotating shaft, 36, 36', 37, 37': Rotating arm, 3
8, 38', 39, 39': Link arm, 40:
Cutting dimension setting means, 41: Virtual saw core display means, 4
2,43: Auxiliary ruler.

Claims (1)

[Scope of Claims] 1. In an automatic material feeding fork that delivers and receives sawn wood between a first position on the side of a sawmill and a second position on a material feeding path, (a) placing sawn wood; (b) a rotary shaft disposed parallel to a feed path of the sawmill; a reversible rotary motor that drives the rotating shaft in forward and reverse rotation; and a first pair of motors, each of which has one end fixed to the rotating shaft spaced apart from each other in the axial direction, and whose other end extends parallel to the rotating shaft. a moving arm;
A second pair of rotating arms each having one end fixed to the rotating shaft at a distance in the axial direction, and the other end extending parallel to the first pair of rotating arms at an angle of 180°. a pair of pivoting arms, each one end of which is pivotally connected to the free end of the first pair of pivoting arms, and the other end of each extending toward the material feed path above the rotation axis. a first pair of link arms, each one end of which is connected to the second pair of link arms;
a second pair of link arms pivotally connected to the free ends of the pair of pivot arms, the other ends of which extend toward the material feed path below the rotating shaft; a first pair of driven means arranged perpendicular to the feed path and each supporting a first pair of fork members guided on horizontal guide means arranged perpendicular to the feed path; a second pair of driven means guided on horizontal guide means each supporting said second pair of fork members, said horizontally reciprocating said fork means horizontally; (c) vertical reciprocating means disposed on said driven means for reciprocating said respective pairs of fork members vertically and synchronously with respect to said respective pairs of driven means; and (d) A position away from the saw core of the sawmill by a distance corresponding to the one-way travel distance of the horizontal reciprocating movement of the driven means on the sawn material received on the pair of fork members in the first position. (e) a cutting dimension setting means having a virtual saw core display means for displaying a virtual saw core, and a pair of auxiliary rulers for setting a cutting dimension with respect to the virtual saw core display means; (e) the reversible rotation motor; The first and second pairs of rotating arms are alternately rotated forward and backward at a rotation angle of 180 degrees, and the first and second pairs of driven means are moved between the first and second positions. Go back and forth alternately,
Prior to the reciprocating movement, a pair of fork members heading for the outward path is raised, a pair of fork members heading for the return path is lowered, and the sawn material is accurately cut to the dimensions set on the saw machine without interfering with each other. (f) Prior to cutting in the sawmill, the ruler of the sawmill is stepped in relation to the saw core based on instructions from the operator in accordance with the cutting dimensions set for the material to be cut. An automatic material feeding fork that features: 2. In an automatic material feeding fork that transfers sawn material between a first position on the side of a sawmill and a second position on the material feeding path, a fork means having a first and second pair of fork members for feeding material between second positions; (b) a rotating shaft disposed parallel to the material feeding path of the sawmill; a reversible rotary motor for rotational driving; a first pair of rotating arms, each of which has one end axially spaced apart and fixed to the rotating shaft, and whose other end extends in parallel;
A second pair of rotating arms each having one end fixed to the rotating shaft at a distance in the axial direction, and the other end extending parallel to the first pair of rotating arms at an angle of 180°. a pair of pivoting arms, each one end of which is pivotally connected to the free end of the first pair of pivoting arms, and the other end of each extending toward the material feed path above the rotation axis. a first pair of link arms, each one end of which is connected to the second pair of link arms;
a second pair of link arms pivotally connected to the free ends of the pair of pivot arms, the other ends of which extend toward the material feed path below the rotating shaft; a first pair of driven means arranged perpendicular to the feed path and each supporting a first pair of fork members guided on horizontal guide means arranged perpendicular to the feed path; a second pair of driven means guided on horizontal guide means each supporting said second pair of fork members, said horizontally reciprocating said fork means horizontally; (c) vertical reciprocating means disposed on said driven means for reciprocating said respective pairs of fork members vertically and synchronously with respect to said respective pairs of driven means; and (d) A position away from the saw core of the sawmill by a distance corresponding to the one-way travel distance of the horizontal reciprocating movement of the driven means on the sawn material received on the pair of fork members in the first position. (e) a cutting dimension setting means having a virtual saw core display means for displaying a virtual saw core, and a pair of auxiliary rulers for setting a cutting dimension with respect to the virtual saw core display means; (f) the reversible rotary motor is configured to move the first and second pairs of rotating arms; the first and second pairs of driven means are alternately reciprocated between the first and second positions by alternately rotating forward and backward at a rotation angle of 180 degrees;
Prior to the reciprocating movement, a pair of fork members heading for the outward path is raised, a pair of fork members heading for the return path is lowered, and the sawn material is set in relation to the saw core of the saw machine without interfering with each other. (g) Prior to cutting in the sawmill, the ruler of the sawmill is automatically walked based on the instructions from the microcomputer in accordance with the stored set dimensions. An automatic material feeding fork that features: