JPH0321404A - Dressing method of lumber with material feed vehicle - Google Patents

Abstract

PURPOSE:To enable dressing of lumber at favorable yielding by even an amateur and moreover an improvement in operation efficiency, by a method wherein a diameter class of a log is measured, an operated running position centering around its center is sawn, then the surface sawn previously is made into the bottom by turning a sawing material by a fixed angle and the operated running position centering around the center of the log is sawn again. CONSTITUTION:The diameter Y of a sawing material 5 supported on a material feed vehicle is measured, the center O of the diameter is obtained and running is performed on the basis of the center O. In the case where dressing of square lumber for example, with AXB methods, running is started by operating Y/2+A/2 on the basis of the center O and the first cutting is performed. Then the first cut surface is made into the bottom by turning the sawing material by 90 deg., the running is started under this state by operating Y/2+B/2 on the basis of the center O and the second cutting is performed. Then the sawing material 5 is turned again further by 90 deg. and the second cut surface is made into the bottom, the running is started under this state by operating Y/2+A/2 on the basis of the center O and the third cutting is performed. The fourth cutting is performed similarly and square lumber is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for harvesting wood from logs using a lumber truck.

[Conventional technology]

As shown in Fig. 6, a material transport vehicle generally consists of a guide rail 1 laid in a straight line, a material transport vehicle main body 2 running on the guide rail, and a head block support mounted on the material transport vehicle main body. A base (hereinafter referred to as a boat) 3, a head block 4 that is slidably mounted on the boat 3 in a direction perpendicular to the moving direction of the material transport vehicle body 2, and the head block 4 is slid with respect to the boat 3. The sawn material 5 is positioned by the boat 3 and the head block 4 and fixed by a casing, and the head block 4 is slid relative to the boat 3 to measure the remaining dimension a of the sawn material 5, that is, the band saw. The sawn material 5 is sawn by the band saw 6 by determining the dimension between the band saw 6 and the front surface of the head block 4, and by sending the material conveying vehicle body along the guide rail 1.

The conventional method for cutting wood from logs is shown in Figure 5 (a).
As shown in the figure, after sawing the first surface (a) using the remaining step, rotate the sawn material 180 degrees as shown in the same figure (b), and then saw the sawn material parallel to the first surface using the remaining step. The second surface (opening) is sawn, and then the third surface (c), which is perpendicular to the first and second surfaces, is sawn using the same residual step as shown in the same figure (c). was.

[Problem to be solved by the invention]

However, in the conventional wood cutting method, two parallel planes are sawn using a residual length step, so considerable experience and sensitivity are required to cut wood with a good yield, and there is a risk that the yield will be poor. Furthermore, since the conventional method requires <180° tree removal as described above, a considerable amount of time is required for 180 degree tree removal, resulting in a problem of poor efficiency.

The present invention aims to improve the above-mentioned problems and provide a method for removing wood using a lumber truck, which allows even an amateur to remove wood with a high yield and improves work efficiency. [Means for Solving the Problems] In order to achieve the above-mentioned objects, the present invention measures the diameter of a log, saws the log at a calculated walking position centered on its center, and then cuts the sawn log into a saw. Rotate 90 degrees and use the previously sawn surface as the bottom surface, saw again at the calculated step position centered on the center of the log, then rotate the sawn material 90 degrees and use the surface sawn in the previous process as the bottom surface. is the bottom surface, and sawing is performed again at the calculated step position centered on the center of the log.

[For production]

As described above, the present invention is a center indexing walking method that measures the diameter class of a log and uses the center as a reference.
Yields can be improved even by non-skilled workers, and since the cutting angle is 90°, it can be done very efficiently simply by raising the slag.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

Figures 1 and 2 are explanatory diagrams showing the basic idea of the present invention, in which the diameter Y of sawn timber 5 supported on a timber transport vehicle is measured to find its center 0, and the center O is used as a reference. Start walking. Note that the material transport vehicle to which the present invention is applied is equipped with a microcomputer control unit, and is capable of measuring the diameter Y. The microcomputer control section performs calculations to determine the center O, calculation of the walking position, and execution of the walking movement.

For example, when cutting a square lumber using the AXB method, step out and make the first cut as shown in FIG. 1(a). next,
As shown in Fig. 2, when the upper casing is raised and then the lower casing is raised, the sawn timber 5 is rolled 900@ and the first
This is the case when the cut surface becomes the bottom surface and is scraped off.

As shown in FIG. 4(a), ① Walk to the cutting position. However, t1 and tz are the saw cut dimensions and +t2 is calculated. (2) Step forward to the cutting position, then step forward and perform the second cut as shown in FIG. 1(b). next,
As shown in Figure 2, after raising the upper kasugai again,
When the lower slag is raised, the sawn timber 5 is further rotated 90' so that the second cut surface becomes the bottom surface, and in this state, a third cut is made with the center O as a reference as shown in FIG. Figure 1 (d
) shows the square timber obtained by further making the fourth cut.

FIGS. 3 and 4 further illustrate the method of the present invention.

In this example, a square phase with dimensions AXB is made from a log.
After cutting the board material having the thickness dimensions of a and b to the wood position, raise the casing in the same way as in Fig. 2 and cut it to the position shown in Fig.
As shown in b), the third cut surface is the bottom surface, and in this state ■
and ■cut.

cormorant.

Furthermore, although a detailed explanation will be omitted, the sawn timber is rotated 90 degrees again and the cut surface is made the bottom surface as shown in Fig. 4 (C), and in this state, ■, ■, and ■ are cut. 9 pieces of wood
Rotate it by 0° and use the cut surface (■) as the bottom image as shown in the same figure (d), and in this state, cut (■) and @l.

〔Effect of the invention〕

As described above, according to the present invention, the diameter class of the log is measured and the center indexing step is performed based on the measured center, so even non-experts can perform wood cutting with a high yield. Furthermore, since tree removal can be carried out simply by raising the slag at a 90° angle, it has the effect of significantly improving work efficiency.

[Brief explanation of the drawing]

Figures 1 (a) to (d) are explanatory diagrams of each process showing the basic idea of the present invention, Figure 2 is an explanatory diagram of the action of tree removal, and Figure 3 is an explanatory diagram of each process showing the basic idea of the present invention.
The figure is an explanatory diagram of the cutting position when cutting a square lumber and a board, and FIGS. 4(a) to 4(d) are explanatory diagrams of each process when cutting the wood shown in FIG. 3. Figure 5 is an explanatory diagram of the conventional wood removal method, and Figure 6 is a diagram of the configuration of a general lumber transport vehicle. Y...Diameter of the log, O...Center of the log, A, B
...Dimensions of square timber - al, act al e a2
s bee bl'...Plate material. Fig. 2 ◆ 7° F Le main Fig. 4 Fig. 5

Claims (1)

[Claims] Measure the diameter of the log, saw the calculated step position centered on the center, then rotate the sawn material 90 degrees so that the previously sawn surface is the bottom surface, and then saw the sawed material again with the center of the log as the center. The calculated step position was sawn, and the sawn material was further cut to 90 mm.
゜Rotate and use the surface sawn in the previous process as the bottom surface,
A method for cutting wood using a lumber truck, which is characterized by sawing again at a calculated walking position centered on the center of the log.