JP2976218B2 - Log feeder for sawmill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a log feed truck for a sawmill.

[0002]

2. Description of the Related Art A twin saw is one of sawmills for processing raw wood into square lumber and the like. This will be described below with reference to FIGS. 1 and 4. FIG.

That is, 1 is a front guide track body, 2 is a rear guide track body, 3 is a log feed truck, and 4 is a log cutting device.

[0004] Explaining each part in detail, the front guide track body 1 and the rear guide track body 2 are arranged in a line, and each of them supports a pair of guide tracks 5,5 and supports these tracks 5,5. Erection table 6 and legs 7.

The log feed truck 3 has wheels 9 mounted on the front of a slender table 8 and a rectangular tubular guided body 10 with wheels 9 mounted on its rear so that it can be moved back and forth by hydraulic power or the like. The claw gripping devices 11a and 11b are mounted on the front of the elongated base 8 and the upper part of the guided body 10, respectively.

At this time, each of the claw gripping devices 11a, 11b
Are gripping rods 12a, 12b each having a claw body 12 fixed at the tip.
Is mounted so that it can be driven forward and backward in the front-rear direction, and can be driven to rotate about its center line. Reference numerals 13a and 13b denote pneumatic cylinder devices erected at appropriate intervals on the upper surface of the elongated base 8, and may be omitted depending on the surrounding conditions.

The log cutting device 4 is provided upright between the front guide track body 1 and the rear guide track body 2, and is specifically configured as follows.

That is, support frames 14, 14 are provided on each of the left and right sides of the log feed cart 3 so as to be movable in the left-right direction f1, and a pair of upper and lower guide wheels 15,
16 is installed. An endless band saw 17 is wound around each pair of the guide wheels 15 and 16, and the guide wheels 15, 1
6 is driven by a motor (not shown). At this time, 17a is an incisor.

Reference numeral 18 denotes a cut-off material processing apparatus, which is specifically configured as follows. That is, the front guide track body 1
The support bases 19, 19 are movably opposed to each other at a fixed height position on each of the left and right sides in the left-right direction f1, and each support base 19 moves integrally with the support frame 14 on the same side. The exclusion plate 20 is fixed to the inner edge of each support base 19 in an upright state at a fixed inclination angle, and the upper surface of each support base 19 moves outward from the exclusion plate 20 to the left and right sides. A transfer device 21 having a transfer surface to be provided is provided.

A robot arm (not shown) is provided on the side of the rear guide track body 2 to supply the log to the log feed truck 3 and to take out the finished lumber. The squares a and a are machine working spaces necessary for the robot arm to perform the operation of supplying and extracting the raw wood w.

Next, an operation example of the twin saw will be described. When the operation is started, the log feed cart 3 is moved to the rightmost end on the front and rear guide rails 1 and 2 by the rotation of a motor (not shown) as shown in FIG. At this time, the gripping rods 12a, 12b of the nail gripping devices 11a, 11b
b has receded out of the slender base, and thus a pair of claw bodies 1
The distance between 2 and 12 is large.

Under this condition, the robot arm grasps the peripheral surface of the log w cut into an appropriate length in advance and moves it to the measurement position. At this position, the diameter of the log w and the position of the core are automatically measured, and based on the measurement result, the guided body 10 is automatically moved with respect to the slender base 8 so as to correspond to the length of the log w. Fixed in position.

Thereafter, the robot arm operates again to move the measured log w onto the log feed cart 3 via the square points a, a. When this movement is completed, the gripping rods 12a, 12b of the claw gripping devices 11a, 11b advance and operate.
A pair of claw bodies 12, 12 pierce both end surfaces of the log w,
The log w is supported at a fixed height position. Further, the pneumatic cylinder devices 13a and 13b are extended and the log w
Is supported, whereby the log wood w is in a state where bending and vibration are regulated.

After this state, the robot arm releases the log w and retreats to a specific position. In connection with this retreat, the log feed cart 3 travels forward f2 by the operation of a motor (not shown).

On the other hand, the log cutting device 4 has already
7, the pair of support frames 14, 14 are automatically moved to a specific position in the left-right direction f1 based on the measurement result described above.
Numeral 7 is fixed at a required interval position.

Accordingly, the raw wood w is pressed against the cutting teeth 17a of the band saw 17 on the right and left sides of the end face by the feed movement of the raw wood feed cart 3, and is cut into a predetermined width in order. Then, after a certain period of time, it is completely cut as shown in FIG. 4, and the back plates w1, w1 generated by this cutting fall.

In this case, since the rejection plate 20 is moved together with the support frame 14 and the support stand 14 and is in a state of being close to the log feed truck 3, the back plate w1 is normally guided to the outer surface of the rejection plate 20. Then, the transport device 21 drops on the support base 19 toward the transport start end of the transport device 21, and is subsequently carried out by the transport device 21 to the side outward f <b> 4.

When the first-stage cutting of the raw wood w is completed in this way, the raw wood feed cart 3 returns to the rear side f3 and travels to return to the initial position, and the pneumatic cylinder devices 13a, 13a
b is shortened. Then, based on the control information inputted in advance, the gripping rods 12a, 12b are rotated by 90 degrees and the pneumatic cylinder devices 13a, 13b are again extended, whereby the log w on the log feed cart 3 becomes 9
It will be in a state of being rotated 0 degrees.

Thereafter, the log feed cart 3 travels forward f2 again, and the log w moves the band saw 1 on the left and right sides of the end face in the same manner as described above.
After being pressed against the incisors 17a, 17a of 7, 7, and after a certain period of time, they are completely cut to form square bars. The back plate generated by the cutting in the second stage is also guided by the elimination plate 20, falls, and is carried out to the side outward f4 by the transfer device 21.

When the cutting of the raw wood w is completed,
The log feed truck 3 travels backward f3 again and returns to the initial position, and the pneumatic cylinder devices 13a and 13b are shortened.

Thereafter, the robot arm further proceeds to grasp the square bar on the log feed truck 3. Subsequently, the grip bars 12a, 12b are retracted, and the claw bodies 12, 1 are moved.
2 releases the gripping of the timber. Thereafter, the robot arm moves the timber to the specific location and returns to the original position. Thereafter, the same operation is repeated, and the logs are automatically turned into timber one after another.

In this twin saw, the band saw 17 may be used such that the position of the band saw 17 is intermittently moved in the left-right direction f1 by a certain dimension, and the saw log w is cut by the band saw 17 for each movement. In this case, plate members having a thickness corresponding to the size of one movement are cut out one after another on the support base 19.

[0023]

In the above twin saw, when the log w is cut by the band saw 17, the back plate w1 normally falls on the support base 19, but the log w has a relatively large internal stress. In the case where there is, the cut back plate w1 immediately bends greatly, and as shown in FIG. 4, becomes slanted and falls between the exclusion plate 20 and the log feed cart 3,
The guide plate 20 cannot receive an appropriate guiding action, and it becomes entangled with the elongated base 8.

When the thickness of the back plate w1 is too thin, the back plate w is also placed between the reject plate 20 and the log feed cart 3.
1 falls and becomes entangled with the elongated base 8.

When the backboard w1 is entangled, when the log feed cart 3 returns to the rear side f3, the backboard w1 is carried to the rear side f3 together with the log feed cart 3 and collides with each part of the body. As a result, various parts of the fuselage are damaged or the band saw 17
6 and cause problems such as serious accidents.

An object of the present invention is to provide a log feed truck for a sawmill which can easily solve such problems.

[0027]

According to the present invention, there is provided a nail holder provided at the front and rear portions of a slender base which moves on a track, and the nail gripping device is provided with a front-rear end surface of a log in the longitudinal direction. A vertical plate existing between the lower surface and the upper surface in the longitudinal direction of the slender table is appropriately raised and lowered in the vertical direction to mount a blocking plate device on the slender table so as to be partitioned into the left and right sides in the longitudinal direction. It is assumed to be a configuration provided.

More specifically, the blocking plate device is composed of a fluid pressure cylinder device fixed to the upper surface of the elongated base, and a blocking plate that is moved up and down by the fluid pressure cylinder device. In this case, the blocking plate is preferably a box-shaped casing surrounding the hydraulic cylinder device.

Also, the supply and discharge of the raw wood are performed mechanically and
In a sawmill equipped with a hydraulic cylinder device for supporting a log on a slender base, a shut-off plate device is provided with a mechanical working space required for mechanical supply and discharge of the log and a hydraulic cylinder device for supporting a log. A plurality is provided avoiding existing locations.

[0030]

FIG. 1 is a side view showing a twin saw, which is a kind of sawmill having a log feed truck according to the present invention,
FIG. 2 is a side view showing the log feed cart, and FIG.
It is a figure which shows -x part.

In these figures, the same parts as those of the conventional structure are the same as those already described, so the same reference numerals are given and the description is omitted.

In the log feed cart 3, reference numerals 31 and 32 denote blocking plate devices provided on the upper surface of the slender table 8, and are specifically as follows.

That is, the fluid (pneumatic) pressure cylinder devices 33a and 33b are arranged on the upper surface of the elongated base 8 in a standing manner. Slender table 8 between these pneumatic cylinder devices 33a, 33b
An electromagnetic switching valve 34 is provided on the upper side, and by operating the electromagnetic switching valve 34, an air flow path 35 for flowing air to the pneumatic cylinder devices 33a and 33b can be appropriately switched.

At this time, the electromagnetic switching valve 34 is automatically operated in connection with the operation of each part of the twin saw, and is supplied with compressed air from the outside.

A blocking plate 36 is provided at a location surrounding the pneumatic cylinder devices 33a and 33b. This blocking plate 36
Is a thin rectangular parallelepiped metal box-shaped casing having only a lower surface opened, and includes pneumatic cylinder devices 33a and 33
b and the solenoid-operated switching valve 34 as well as most of the air flow path 35, and the inner surface of the upper surface s is formed by a pneumatic cylinder device 33a,
33b is fixed to the tip of the piston rod, and is vertically displaced within a certain height range by the expansion and contraction operation of the pneumatic cylinder devices 33a and 33b.

The above-mentioned blocking plate devices 31 and 32 are used for the raw wood w.
This is provided so as to avoid the mechanical working spaces a, a necessary for the mechanical supply and discharge of pneumatic cylinder devices 13a and 13b, which are provided on the slender base 8 and support the raw wood w. The elongated base 8 is provided over a range as long as possible in the length direction.

An operation example of the twin saw having such a configuration will be described. A robot arm (not shown) has a mechanical working space a,
By operating through "a", the log wood w is supplied onto the log feed cart 3 as in the conventional case, and the claw gripping devices 11a and 11b grip this.

In connection with this, each electromagnetic switching valve 34 is automatically switched, and the pneumatic cylinder devices 33a, 33b
Is supplied with compressed air. As a result, the pneumatic cylinder devices 33a and 33b are extended, and each blocking plate 35 is moved to the position shown in FIG.
As shown by a virtual line k, and the upper surface s thereof is
Abut on the lower edge of the plate with an appropriate pressure.

Under this condition, the log feed cart 3 moves forward f2.
Then, the raw wood w is cut by the band saws 17 and 17 on its side, and the backboard w1 generated by this cutting falls.

In this case, if the back plate w1 is bent or becomes thin, the back plate w1 may fall between the rejecting plate 20 and the log feeder truck 3. Up and down so as to eliminate the gap in the vertical space with the upper surface, and the length direction is partitioned off to the left and right sides, so that the backboard w1 is obliquely fitted in this space and the log feed cart is inserted. The phenomenon entangled in No. 3 is effectively suppressed.

Therefore, when the log feed cart 3 returns to the rear side f3 after cutting the log w, even if the back plate w1 falls between the exclusion plate 20 and the log feed cart 3, the log feed is performed. The cart 3 is prevented from carrying the backboard w1, and the log feed cart 3 returns to the initial position without any trouble.

After this return, each electromagnetic switching valve 34 is switched, and the compressed air is discharged from the pneumatic cylinder devices 33a and 33b. For this reason, the pneumatic cylinder device 33a,
33b is shortened to lower each blocking plate 36 in the opposite direction as before, so that the upper surface s is separated from the log w.

Subsequently, each gripping claw 12 is rotated by 90 degrees in the same manner as in the prior art, and the log w is rotated by 90 degrees. Thereafter, the pneumatic cylinder devices 33a and 33b operate the blocking plate 36 by the same operation as described above. It is raised again, and its upper surface s
Abut on the lower edge.

Then, the log w is cut again by the band saw 17 in the same manner as described above. In this case, the back plate w1 generated by the cutting does not become entangled with the log feed cart 3 due to the blocking action of the blocking plate. Therefore, the log feed cart 3 returns without trouble and returns to the initial position.

After this return, the shut-off plate 36 is lowered again by the same operation as described above, so that it does not interfere with the lumber, which is a lumber product. Is taken out to another place. Thereafter, the same operation is repeated.

Incidentally, in the above embodiment, the cut-off plate device 3
Although two 1 and 32 are provided, the present invention is not limited to this, and three or more may be provided. Also, the pneumatic cylinder device 33
In the case where a and 33b are not provided, it is sufficient to provide one long plate unit.

[0047]

According to the present invention constructed as described above, since the barrier plate device effectively regulates the phenomenon that the back plate cut off from the log is entangled, damage to the sawing machine due to the entanglement of the back plate can be prevented. Serious accidents such as personal injury can be effectively prevented.

According to the second aspect, the blocking plate device can be easily formed. According to the third aspect, the fluid pressure cylinder device for operating the blocking plate, the electromagnetic device, The valve and the fluid path are protected by the blocking plate, and the entanglement with the back plate can be more reliably prevented.

According to the fourth aspect of the present invention, the supply of the raw wood onto the elongated base is not hindered mechanically, and the deflection and vibration of the raw wood gripped by the claw gripping device are suppressed by the fluid pressure cylinder device 13a. , 13b do not hinder regulation.

[Brief description of the drawings]

FIG. 1 is a side view showing a twin saw, which is a kind of sawmill having a log feed cart according to the present invention.

FIG. 2 is a side view showing the log feed cart.

FIG. 3 is a diagram showing an xx section of FIG. 2;

FIG. 4 is an operation explanatory view of a conventional example.

[Explanation of symbols]

 Reference Signs List 5 Track 8 Slender base 11a, 11b Claw support device 13a, 13b Fluid pressure cylinder device for supporting raw wood 31, 32 Blocking plate device 33a, 33b Fluid pressure cylinder device 36 Blocking plate a Machine working space w Log

Claims (4)

(57) [Claims] 1. An elongated base for moving on a track, which is provided with claw gripping devices at the front and rear portions thereof. The vertical plate existing between the vertical direction and the upper surface in the vertical direction is provided with a blocking plate device mounted on the slender base so as to be able to be divided into right and left sides in the longitudinal direction by appropriately moving up and down in the vertical direction. Log feeder for sawmill. 2. The sawing machine according to claim 1, wherein the blocking plate device comprises a fluid pressure cylinder device fixed to the upper surface of the elongated base, and a blocking plate vertically operated by the fluid pressure cylinder device. Log feed trolley. 3. The log feed truck according to claim 2, wherein the blocking plate is a box-shaped casing surrounding the hydraulic cylinder device. 4. A plurality of blocking plate devices are provided avoiding a mechanical working space necessary for mechanically supplying and discharging the raw wood and a fluid pressure cylinder device for supporting the raw wood provided on the elongated base. The log feed cart for a sawmill according to claim 1, 2 or 3.