JPH0796204B2 - 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 which can efficiently and easily cut 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 conventional technology is a material feeding vehicle for lumber in which a carriage having wheels on a rail is provided with a head block support base.In the head block support base, a pair of dock chucks that move left and right by a fluid pressure cylinder and move up and down along with a column are used. The attached head block, and a substantially L-shaped first supporting arm pivotally attached to one end of the head block via a pivot,
And a substantially L-shaped second support arm which is pivotally attached to the head block support base, pivots from a vertical state to a horizontal state, and can be moved back and forth in the longitudinal direction of the head block support base by a fluid pressure cylinder. In this case, the length of the facing portion of the support arm is longer than the width of the band saw teeth.

Separately from this, JP-A-59-19250
As shown in Japanese Patent Publication No. 1, a cutting reference line is provided for a material to be cut and transferred to a material posture setting device, where the cutting 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 material is ground by a saw blade provided on the side of the moving track of the material feeding device. A method for slicing wood to be broken is also known.

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 machine on the side of the material feeding device. Of wood with a saw rolling device and a sawing reference line detecting device near the rolling device and a glazing device for transferring the lumber from the attitude setting device to the feeding device. The grinding processing device is also a well-known technique.

[0005]

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
After changing the direction and gripping again, it was ground a second time to obtain a square 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 changes the direction of the drum material obtained by first grinding the bent log to 90 ° without removing it from the gripping claws of the material feeding vehicle, and then 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.

[0008]

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 drive unit 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 material feeding vehicle by a transmission member such as a gear, and a first bevel gear is provided at a tip of the cylinder shaft. Is coaxially supported, and the drive portion of the eccentric drive source is coupled to the rear end thereof and the drive source is fixed to the cylinder shaft by a connecting and fixing member such as a cylinder, and further at the tip of the cylinder shaft. Is fixed to the bearing cylinder of the center shaft and is meshed with the first bevel gear between a pair of support plates mounted in parallel to the side faces thereof to fix the second bevel gear to the pivot to pivotally support the shaft. It was achieved by coaxially fixing the gripping claw spur gears on both sides.

[0009]

When the bent raw wood is bent between two sets of gripping claw gears arranged opposite to each other on the pair of bases of the material feeding vehicle, the two wood mouths are gripped so that the bending direction is vertical. When the raw wood is transferred in the axial direction by the driving force of the material feeding vehicle, the left and right of the raw wood being transferred can be ground for the first time into a drum shape with a cross section using a well-known twin band saw to make a drum material slightly curved up and down. .

Next, after the drum material is returned to the original position before the first grinding by the movement of the material feeding wheel, the direction of the gripping claw spur gear is rotated by 90 ° by the cylinder shaft through the gear by the rotational force of the rotary drive source. As a result, the drum material can be made to have its first ground surface facing vertically.

Then, a sawtooth line as a pillar material of a twin band saw is drawn on each of the first ground surfaces by using a well-known laser light irradiator or the like. 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 bevel gear is rotated by the rotational force of the eccentric drive source together with the pair of gripping claw gears of this drum material 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 feeder wheel is moved again, and the rounded side surface of the drum material is cut out by the parallel twin blades of the twin band saw to obtain a square pole pillar material that is almost correct except for both end portions. You can

[0014]

EXAMPLES Examples will be described with reference to the drawings. First, as shown in FIGS. 1 and 2, the basic structure of the present invention is for sawing with a twin band saw BS between the gripping claw spur gears on the base, which are installed in front of and behind the long feeding vehicle S. In constructing a device for sandwiching and grasping the wood W of the wood W at the mouth end surface thereof, the cylindrical shaft 3 pivotally supported by the bearing 2 on the base 1 of the material feeding vehicle S 3
The drive unit m1 of the rotary drive source M1 is connected to the base of the drive unit by transmission members such as gears G1 and G2 as shown in FIG.

As shown in FIG. 4, a central shaft 4 having a first bevel gear B1 fixedly attached to the tip end of the cylindrical shaft 3 at the base of its prism by a fixing means such as a click is coaxially pivoted as shown in FIG. Support.

An eccentric drive source M2 is provided at the rear end of the center shaft 4.
The drive source m2 is fixed to the cylinder shaft 3 by a connecting and fixing member m such as a cylinder via the gear G2.

Further, a bearing cylinder 5 of a center shaft 4 as shown in FIG. 4 is welded to the tip of the cylinder shaft 3 after passing through the bearing 2 as shown in FIG.
The first bevel gear B1 is to be meshed with the first bevel gear B1 between a pair of support plates 6 and 6 which are welded and fixed at the side 5a and fixed in parallel to the side surface 5a as shown in FIG. Two
The bevel gear B2 is fixedly attached to the pivot B to pivotally support it as shown in FIG. 3, and the gripping pawl gears 7 as shown in FIG. 4 are coaxially fixed to both sides of the pivot B.

As a concrete example thereof, as shown in FIG. 4, a pivot shaft B, which is planted by welding or the like on the inner surface of one holding claw spur gear 7, is passed through the hole 6a of the support plate 6 and then the second bevel gear B2. While being passed through the pivot B, the first bevel gear B1 is meshed with the pivot B so as to project outward from the hole 6a of the support plate 6 together with the pivot B.

Then, another gripping spur gear is attached to the protruding portion B0.
After inserting 7, the keyway K1 between the pivot B and the second bevel gear B2 and the grip claw spur gear 7 and the second bevel gear B2
By tightly inserting the wedge-shaped key pins K into the key grooves K2 between and as shown in FIG. 4, the second bevel gear B2 can be firmly fixed to the pivot B and the gripping pawl spur gear to the second bevel gear B2. Each 7 can be firmly fixed.

In the drawings, reference numeral n is a set screw, reference numeral SB is a thrust bearing for limiting axial movement, reference numeral C is a cover, and the rotary drive source M1 is an upward projecting piece 2a of the bearing 2. It is firmly fixed, 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 installed on both the left and right sides of the truck as shown in Fig. 1,
It is also possible to provide only on one side and drive the wood on one side.

Further, the material feeding vehicle S may be a well-known one which moves on the rail R laid corresponding to the twin band saw BS, and its base 1, the cylinder axis 3 and the two parallel gripping claw gears 7 are provided. The distance between the parallel outer sides is naturally narrower than the distance between the two parallel saw blades of the twin band saw BS (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 two sets of gripping pawl gears 7, whose tooth surfaces face each other, It is possible to change the interval of 7 by a well-known means through a hydraulic cylinder OS or the like by about ± 10 cm, and securely grip the wood mouth surface of the raw wood W or the drum material W1 between the respective gripping claw gears 7,7 and saw. After that, the column member W2 is released.

The configuration of the present invention is as described above, and its operation will be described below. On the base 1 which forms a pair of the material feeding vehicle S, the two mouths are bent between two pairs of gripping claw spur gears 7 and 7 in the state as shown in FIGS. When the raw wood W sandwiched and gripped as shown in FIGS. 1 and 7 so that the bending direction is the vertical direction is transferred in the axial direction by the driving force of the material feeding vehicle S, the raw wood W in the middle of the transfer is transferred to a well-known twin. A drum material W1 slightly curved up and down can be made by starting the first grinding and sawing in a drum-shaped cross section with a double blade of a band saw BS as shown in FIG.

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 gripping claw spur gear 7 by 90 ° in the direction shown in FIGS. 6 to 5 with the cylinder shaft 3 via the cylinder shaft 3, the drum material W1 is ground so that its initial grinding surfaces a, a are in the vertical direction as shown in FIG. Can be

Saw-tooth lines L and L as pillar materials of the twin band saw BS are drawn on the first ground surfaces a and 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 pair of gripping claw spur gears 7 and 7 holding the drum material W1.
Is rotated through the center shaft 4, the first bevel gear B1, the second bevel gear B2, and the pivot B in sequence by the rotational force of the eccentric drive source M2 shown in FIG. Figure 1 shows the central predetermined area of the material W1 excluding the vicinity of both ends.
Even with a large eccentric lateral movement width so as to fit in 1, it can be preset at once.

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.

[0029]

Since the present invention is constructed as described above, it has the following effects. In constructing a device that grips wood to be sawn between the gripping jaws opposite to the material delivery car by the wood mouth surface, a bearing 2 is installed horizontally on the base 1 of the material supply car with bearings 2. The drive unit m1 of the rotary drive source M1 is connected to the base of the cylindrical shaft 3 by a transmission member such as gears G1 and G2, and the center shaft 4 having the first bevel gear B1 at the tip is coaxially connected to the cylindrical shaft 3. Eccentric drive source M2
The drive source M2 is fixed to the cylinder shaft 3 by a connecting fixing member m such as a cylinder, and the bearing cylinder body 5 of the center shaft 4 is fixed to the tip of the cylinder shaft 3. Then, the first bevel gear B1 is meshed between a pair of support plates 6 and 6 which are attached in parallel to the side surface 5a thereof, and the second bevel gear B2 is fixedly attached to the pivot shaft B for pivotal support. Since the gripping claw gears 7 are coaxially fixed on both sides, the drum material obtained by first grinding the bent log can be turned 90 ° without removing it from the gripping claw gear of the feeding vehicle. By rotating the gear 7, it is possible to correct the eccentric lateral movement of the drum material by a necessary amount all at once, so that a predetermined range portion including the center of the drum material is accommodated in the sawtooth due to the laser irradiation line as the pillar material. Because it is possible, you can easily cut out thick and good quality pillar material from bent log There is an industrial effect that it can be done.

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 cylinder shaft 4 center shaft 5 bearing cylinder 5a side surface 6 support plate 7 gripping claw spur gear B1, B2 bevel gear B pivot M1 rotation drive source M2 eccentric drive source m1, m2 drive unit m coupling fixing member G1, G2 gear

Claims (2)

[Claims] 1. In a device for gripping and holding wood for sawing between gripping claws opposed to a feeding car by its wood mouth surface, a bearing 2 is pivotally supported laterally on a base 1 of the feeding car. The drive part 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 the first bevel gear B1 at the tip is coaxial with the cylinder shaft 3. Pivotally
The drive part m2 of the eccentric drive source M2 is coupled to the rear end of the drive shaft, and the drive source M2 is fixed to the cylinder shaft 3 by a connecting and fixing member m such as a cylinder body. Of the bearing cylinder 5 is fixed to the side face 5a of the support plate 6,6 and the first bevel gear B1 is meshed with the second bevel gear B2 so that the second bevel gear B2 is fixed to the pivot B. In addition, a wood gripping device in which gripping claw spur gears 7 are coaxially fixed on both sides of the pivot B. 2. The wood gripping apparatus according to claim 1, wherein the wood between the two sets of gripping claw spur gears 7 and 7 facing each other is rotated by the rotational force of one rotary drive source M1.