JPH0735043B2 - Wood gripping device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood gripping device for feeding materials capable of cutting a thick pillar material from a bent log.

[0002]

2. Description of the Related Art As a wood gripping device of this type, there has been a device described in Japanese Utility Model Publication No. 1-11433.

This prior art is a material feeding vehicle for lumber in which a carriage having wheels on rails is provided with a head block support base, and a pair of head block support bases are moved left and right by a fluid pressure cylinder and moved up and down along columns. A head block to which the dock chuck of FIG. 2 is attached, a substantially L-shaped first supporting arm pivotally attached to one end of the head block via a pivot, and a head from the vertical state to a horizontal state pivotally attached to the head block support base. And a substantially L-shaped second support arm that can be moved back and forth in the longitudinal direction of the head block support base by a fluid pressure cylinder, and the lengths of the facing portions of the support arm are respectively determined from the width of the band saw teeth. It is a delivery vehicle that is characterized by being made longer.

Separately from this, JP-A-59-19250
The one disclosed in Japanese Patent No. 1 is also well known.

In this conventional example, a sawing reference line is provided for the material to be sawed, and this is transferred to a posture setting device for the material, where the sawing reference line is detected and a predetermined posture is set. Then, the material is transferred to the material feeding device in this posture, held by this material feeding device, then the material feeding device is moved, and the saw blade provided beside the moving track of the material feeding device. It is a method for wood splitting, which is made by cutting wood.

As a device for executing the above method, a material storage device provided with a ground reference line as described in the above publication, a material attitude setting device, a material feeding device, and a saw near the material feeding device. A wood which comprises a board and a rolling device for the material and a detection device for the sawing reference line facing the rolling device and a glazing device for transferring the material from the attitude setting device to the material feeding device. The grinding processing device is also a well-known technique.

[0007]

In each of the above-mentioned conventional techniques, raw wood is first ground into a drum shape with a twin band saw and then lumbered. Then, the drum-shaped wood is removed from the wood mouth surface checking member, and the first time. 90 ° so that the grinding surface is up and down
It was turned around and gripped again and then ground a second time to obtain a pillar material.

Therefore, the work of changing the direction of the drum material is complicated, and moreover, it takes time to determine the sawing reference line (so-called saw path determination), and in particular, a thick and correct pillar material is cut out from a log having a slight bend. Has a problem that it is troublesome and the workability is poor because it has to be grasped many times when deciding the saw path.

In order to eliminate the above-mentioned problems, the present invention turns a drum material obtained by first grinding a bent log into 90 ° without removing the drum material from the gripping claws of the material feeding vehicle, and then uses it as a pillar material. It is an object to correct the eccentric lateral movement so that a predetermined range portion including the center of the drum material fits inside the saw blade.

[0010]

DISCLOSURE OF THE INVENTION The above-mentioned object of the present invention is to construct a device for gripping and holding wood for sawing between gripping claws opposed to a feeding vehicle by sandwiching the wood with the wood mouth surface. , A driving portion of a rotary drive source is connected to a base portion of a cylinder shaft pivotally supported and laterally mounted on a base of a feeding vehicle by a transmission member such as a gear, and an eccentric pin is provided at a tip end of the cylinder shaft. A center shaft is coaxially supported, and a drive unit of an eccentric drive source is connected to the rear end of the center shaft and the drive source is fixed to the cylinder shaft by a connecting and fixing member such as a cylinder body. The dovetail groove of the grasping claw plate is engaged with the pair of guide rails fixedly attached to the body and attached in parallel to the front end faces thereof and the outer slant surface thereof, and then the eccentric pin is engaged with the groove to grasp the grasping claw plate. Can be achieved by movably arranging on the front end surface of the cylindrical body.

[0011]

[Operation] In the case of bent raw wood between a pair of gripping claw plates on the base of a feeding vehicle, the raw wood gripped by sandwiching both wood mouth faces with well-known means so that the raw wood bending direction is the vertical direction When the material is transferred by the driving force of the material feeding vehicle, the raw wood in the middle of the material transfer can be ground into a drum shape in cross section for the first time with a well-known twin band saw to make a drum material slightly curved up and down.

Then, after returning the drum material to the original position before the first grinding by the movement of the material feeding wheel, the gripping claw plate is rotated by 90 ° by the cylinder shaft through the gear by the rotational force of the rotary drive source. The drum material can have its first ground surface facing up and down.

Saw-tooth lines as pillar materials of twin band saws are drawn on the first ground surface using a well-known laser light irradiator, etc. Since there are two first ground surfaces, the upper and lower surfaces are cylindrical. Draw the sawtooth line by turning the axis 180 degrees.

When a predetermined range portion including the center of the drum material deviates from the above line, the drum material is rotated together with the pair of gripping claw plates by the rotating force of the eccentric drive source to rotate the eccentric pin via the center shaft. By slightly moving the eccentric laterally, presetting can be performed so that the center predetermined range portion above and below the drum material is entirely accommodated in the sawtooth line.

Next, the feeding vehicle is moved again, and the rounded side surface of the drum material is cut out by the twin blades of the twin band saw to obtain a square pillar material which is almost correct except for both end portions. You can

[0016]

EXAMPLES Examples will be described with reference to the drawings. First, as shown in FIG. 1 and FIG. 2, the basic structure of the present invention is that a wood W for sawing with a twin band saw BS is provided between the gripping claws provided in front of and behind the long feeding vehicle S. In constructing a device for sandwiching and gripping with the, the rotary drive source M1 is provided at the base of a cylindrical shaft 3 pivotally supported by a bearing 2 on the base 1 of the material feeding vehicle S.
The driving part m1 of the above is connected by transmission members such as gears G1 and G2 as shown in FIG.

Then, as shown in FIG. 4, a center shaft 4 having a disk 4b having an eccentric pin 4a at its tip is inserted into the cylindrical shaft 3 and is coaxially supported as shown in FIG.

Further, a drive portion m2 of an eccentric drive source M2 is connected to the rear end of the center shaft 4, and the drive source M2 is connected to the cylinder shaft 3 via, for example, the gear G2, a connecting and fixing member m such as a cylinder. Fix with.

Further, as shown in FIG. 3, a cylindrical body 5 as shown in FIG. 4 is clicked and fixed to the distal end of the cylindrical shaft 3 so that its distal end surface 5a.
After the state shown in FIG. 4, the dovetail groove 7a of the grip claw plate 7 as shown in FIG. 4 is engaged with the pair of guide rails 6, 6 to be attached in parallel as shown in FIG. As shown in FIG. 3, the eccentric pin 4a is inserted into the groove 7b through the state shown in FIG.
It is movably arranged.

In the drawings, all of the symbols n are set screws, symbol SB is a thrust bearing for limiting axial movement, and the rotary drive source M1 is an upward projecting piece 2a of the bearing 2.
It is firmly fixed to, and all parts are made of strong materials such as metal.

For each drive source M1 and M2, a stepping motor, a hydraulic motor, or a combination of a hydraulic cylinder and a rack and pinion can be used, and further, a rotary drive source M1.
May be provided on both left and right sides, but may be provided on only one side and driven to rotate on one side.

Further, the material feeding vehicle S may be a known one that moves on the rail R laid corresponding to the twin band saw BS, and the width of the base 1, the cylinder shaft 3 and the grip claw plate 7 of the twin band saw BS. It is naturally narrower than the interval between two parallel saw blades (about 90 mm or more).

The base 1 is arranged on the upper surface of the fixed frame of the material feeding vehicle S so as to be movable back and forth by a well-known slide guide member, and the gap between the pair of left and right gripping claw plates 7, 7 is set to the hydraulic cylinder OS. By making it possible to change about ± 10 cm by a well-known means through the above-mentioned means, after firmly grasping the wood mouth surface of each of the raw wood W and the drum material W1 between the respective grasping claw plates 7,7 and sawing, grasping the pillar material W2. Is configured to release.

The configuration of the present invention is as described above, and its operation will be described below.

On the base 1 of the material-feeding vehicle S, in the case of a log that bends both wood mouth faces between the pair of gripping claw plates 7 and 7 in the state shown in FIGS. 1 and 6, the bending direction of the log is up and down. 1, so that the direction
When the raw wood W sandwiched and gripped as shown in FIG. 7 is transferred in the axial direction by the driving force of the material feeding vehicle S, the raw wood W in the middle of this transfer is drum-shaped in cross section with a well-known twin band saw BS as shown in FIG. It is possible to make a drum material W1 that is slightly curved up and down by first sawing and then sawing.

Then, the drum material W1 is returned to the original position before the first grinding by moving the material feeding wheel S as shown in FIG. 9, and then the gear shown in FIG. 3 is generated by the rotational force of one or left and right rotary drive sources M1. By rotating the grip claw plate 7 by 90 ° in the direction from FIG. 6 to FIG. 5 by the cylinder shaft 3 via the cylinder shaft 3, the drum material W1 is moved so that its initial grinding surfaces a, a are vertical as shown in FIG. can do.

Then, the sawtooth lines L, L as pillar materials of the twin band saw BS are drawn on the first ground surfaces a, a, respectively, using a well-known laser light irradiator as shown in FIG. Has two surfaces, the saw shaft lines L, L are drawn by rotating the cylinder axis 3 by 180 ° on each of the upper and lower surfaces.

When a predetermined range portion including the center of the drum material W1 is deviated from the lines L, L as shown in FIG. 10, the drum material W1 is shown in FIG. 3 together with the pair of gripping claw plates 7,7. The eccentric pin 4 is inserted through the center shaft 4 by the rotational force of the eccentric drive source M2.
By rotating a to slightly eccentrically laterally move, it is possible to preset the center predetermined range portion within the sawtooth lines L, L except for both ends of the drum material W1 as shown in FIG.

Next, the material feeding wheel S is moved again, and the rounded side surface of the drum material W1 is cut out by the parallel double blades of the twin band saw BS. W2 can be obtained as shown in FIG.

[0030]

Since the present invention is constructed as described above, it has the following effects. In constructing a device for sandwiching and holding wood for sawing between gripping claws opposed to a material-feeding car, the wood-carrying surface is pivotally supported by a bearing 2 on a base 1 of the material-feeding car S. The drive unit m1 of the rotary drive source M1 is connected to the base of the installed cylinder shaft 3 by a transmission member such as gears G1 and G2, and the center shaft 4 having an eccentric pin 4a at the tip is coaxially supported inside the cylinder shaft 3. Then, the drive portion m2 of the eccentric drive source M2 is connected to the rear end thereof, and the drive source M2 is fixed to the cylinder shaft 3 by a connecting and fixing member m such as a cylinder body.
The dovetail groove 7a of the gripping claw plate 7 is inserted into the pair of guide rails 6 and 6 and the outer slanted surfaces 6a and 6a of which the cylindrical body 5 is fixed to the tip end of the guide rail 6 in parallel with the tip end surface, and Engage the eccentric pin 4a in the groove 7b to move the grip claw plate 7 into the cylindrical body 5
Since it is movably arranged on the tip surface 5a of the No. 9, even if the drum material obtained by first grinding the bent log is not removed from the gripping claws of the feeding vehicle, 90
° It is possible to change the direction, and the eccentric lateral movement of the drum material can be corrected so that the predetermined range part including the center of the drum material can be accommodated within the saw blade by laser irradiation as a pillar material, so It has an industrial effect that it is possible to easily cut out a thick, high-quality pillar material.

According to claim 2, the rotary drive source M1 and the gear G
By reducing the number of G1, etc. used, the effect that it can be implemented more economically can be added.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a lumber mill using the inventive device.

FIG. 2 is an enlarged elevational view showing an example of a lumbering apparatus using the device of the present invention.

FIG. 3 is an enlarged sectional view showing a main part of the device of the present invention.

FIG. 4 is an exploded perspective view showing a main part of the device of the present invention.

FIG. 5 is a perspective view showing a main part of the device of the present invention.

FIG. 6 is a perspective view showing a state different from that shown in FIG.

FIG. 7 is a schematic plan view showing an example of use of the device of the present invention.

FIG. 8 is a schematic plan view showing a state different from that shown in FIG.

9 is a schematic plan view showing a state different from that shown in FIG.

FIG. 10 is a schematic plan view showing a state different from that shown in FIG.

11 is a schematic plan view showing a state different from that shown in FIG.

FIG. 12 is a schematic plan view showing a state different from that shown in FIG.

[Explanation of symbols]

 1 Base 2 Bearing 3 Cylindrical shaft 4 Middle shaft 4a Eccentric pin 5 Cylindrical body 5a Tip surface 6 Guide rail 6a Outer sloped surface 7 Grip claw plate 7a Dovetail groove 7b Rear groove M1 Rotational drive source M2 Eccentric drive source m1, m2 Drive part m Connection Fixed member G1, G2 Gear S Transport vehicle

Claims (2)

[Claims] 1. In a device for gripping and holding wood for sawing between gripping claws provided opposite to a material-feeding vehicle with its wood mouth surface, a bearing 2 is pivotally supported on a base 1 of the material-feeding vehicle S. Horizontally installed cylinder shaft 3
The drive part m1 of the rotary drive source M1 is connected to the base of the shaft by transmission members such as gears G1 and G2, and the center shaft 4 having an eccentric pin 4a at the tip is coaxially supported at the rear end of the cylinder shaft 3. The drive part m2 of the eccentric drive source M2 is coupled, and the drive source M2 is fixed to the cylinder shaft 3 by a connecting and fixing member m such as a cylinder body. Further, the cylinder body 5 is fixed to the tip of the cylinder shaft 3. And a pair of guide rails 6 and 6 attached in parallel to the tip surface 5a.
The dovetail groove 7a of the grip claw plate 7 is engaged with the outer slopes 6a, 6a, and the eccentric pin 4a is then engaged in the groove 7b to move the grip claw plate 7 into the tip surface 5a of the cylindrical body 5. A wood gripping device that is movably disposed on the. 2. The wood gripping apparatus according to claim 1, wherein the wood between the pair of gripping claw plates 7, 7 is rotated by the rotational force of one rotary drive source M1.