JP2714956B2 - Sawmill - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sawmill used for sawing raw wood.

2. Description of the Related Art In order to obtain a predetermined timber or plate from a log, it is necessary to first create a reference surface of the log. Normally, two opposed reference surfaces are formed by continuous processing in the axial direction, and then the other parts are processed by another machine to form a square bar, a plate material, or the like.

Problems to be Solved by the Invention By the way, in recent years, the use of thinned wood among the logs has increased. Thinned wood is often bent with small diameters and irregular sizes.

Conventionally, when a reference surface is formed on such a log, an outer portion such as a bark portion is cut along an axial direction using a cutting means such as a band saw. However, such a cutting means twists or shifts the surface formed by shifting the traveling direction of the log W, thereby lowering the accuracy. Unless the log is sent in a certain direction while being stably held with respect to the cutting means, the machining accuracy cannot be obtained. Heavy pressure from the cutting means is applied to the raw wood, and the raw wood performs unexpected operations during processing, which is dangerous for work.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sawmill capable of accurately and safely processing a log.

Means for Solving the Problems The present invention relates to a sawmill for forming a pair of reference planes (R1, R2) on a log (W), by crushing an outer peripheral portion of the log (W) to perform the above-described pairing. A pair of cutters (6, 9) simultaneously forming the reference planes (R1, R2) are arranged facing each other, and a pair of long guide plates (20, 20) pass through these cutters (6, 9). ,
21) is arranged, and a plurality of teeth (22) are formed on the upper surface of each of these guide plates (20, 21), and these teeth (22) are formed in grooves along the moving direction of the log (W). There is provided a pressurizing means (4) which extends long and presses the raw wood (W) placed on the guide plates (20, 21) downward, and the raw wood (W) is provided by the transport means (2).
3) The raw wood (W) is conveyed from the upstream side to the downstream side of the guide plate (20, 21) by its own weight and the force of the pressing means (4). The rotation is prevented by meshing with the teeth (22), and the log (W) is guided by the guide plates (20, 21).
Machine that slides on the teeth (22) and moves straight, and is finely crushed while the log (W) is sandwiched between a pair of cutters (6, 9). Is the gist.

Embodiment FIG. 1 shows a raw wood W sawn by a sawmill according to the present invention.
An example is shown. Reference surfaces R1 and R2 are formed on the log W. B is an outer peripheral portion of bark and the like, and C is a xylem.

 Please refer to FIG. 2 and FIG.

The sawing machine has first and second processing means 1, 2, support means 3 and pressurizing means 4.

[First and Second Processing Means] The first and second processing means 1 and 2 are arranged to face near the center of the support means 3. The first processing means 1 has a motor 5, a cutter 6, and a slide table 7. The second processing means 2 has a motor 8, a cutter 9 and a slide table 10.

The cutters 6 and 9 are, for example, of a face milling type and have a large number of blades in the circumferential direction as exemplified by the cutter 6 in FIG.
With 11. The cutters 6, 9 are detachably fixed to the output shafts of the motors 5, 8.

The motor 5 and the cutter 6 can be moved in the direction of arrow A by operating the slide table 7 manually or automatically. The motor 8 is operated by manually or automatically operating the slide table 10.
And the cutter 9 can be moved in the direction of arrow A. Slide stand
By operating 7,10 preferably synchronously, the cutter
It is possible to set the cutting amount for 6, 9 logs W.

[Supporting Means] The supporting means 3 of FIG. 3 has long guide plates 20 and 21. The guide plates 20, 21 are arranged obliquely in a V-shape as shown in FIG. A plurality of triangular projections 22 are formed on the upper surfaces of the guide plates 20 and 21, respectively. The teeth 22 are formed in the longitudinal direction of the guide plates 20, 21.

5 and 6 show the support means 3 in more detail.

In FIG. 5, the support means 31 includes the guide plates 20 and 21 and the bracket 2.
It is fixed to the body 1a via 0a and 21a, respectively. The guide plates 20, 21 are detachable from the brackets 20a, 21a via bolts 20b, 21b, respectively. The teeth 22 of the guide plates 20 and 21 are directed upward and each have eight teeth.

The transport means 23 is arranged below the guide plates 20, 21.
FIG. 5 shows a part of the guide of the chain 23a.

The conveying means 23 includes a chain guide 60, 61, 62, a chain 23a,
It has rollers 63, 65 and 64.

Chain guides 60, 61, 62 are provided on the body 1a. Rollers 63, 65 and 64 are provided on the lower surface of the chain 23a. The rollers 63 are guided by a chain guide 60. The rollers 65 are guided by a chain guide 62.
The rollers 64 are guided by the chain guide 61.

The push plate 24 is detachably provided on the upper surface of the chain 23a by bolts. This push plate protrudes from between the guide plates 20 and 21. The chain 23a can be operated endlessly by the main motor 60 as shown in FIG.

[Pressing Means] In FIG. 3, the pressing means 4 has a T-shaped arm 30 in plan view. The arm 30 is provided with pressure members 41 and 42. These pressure members 41, 42 have substantially the same structure.

In FIG. 2, the pressure member 41 will be described as a representative. The pressure member 41 has a plate 45, a roller 46, and a link 47. The link 47 is integral with the plate 45. Link 47 is connected to rod 48. Rod 48 is the rod of the actuator shown below. By extending the rod 48, the plate 45 is rotated about the pin 49 in FIG. For this reason, the log W can be held under pressure against the teeth 22 of the support means 3 via the rollers 46. The same applies to the pressing member 42.

2, a suction part 150 of a dust collector is provided near the cutter 9. As shown in FIG. Similarly, a suction portion 151 is provided near the cutter 6 as shown in FIG. FIG. 8 shows the cylinders 50 and 100. These cylinders are pneumatic cylinders.

[Operation] First, as shown in FIG. 3 and FIG.
Place upstream of 1. Set the cutting depth of cutters 6 and 9 and
Activate 5, 8 and activate main motor 60. The transport means 23 is driven by the operation of the main motor 60, and the log W moves in the feed direction B.

Activating the actuators 50 and 100 of FIG.
The pressing members 41 and 42 are pressed against the raw wood W by extending 8 and 50a.

At this time, the log W moves straight along the guide plates 20 and 21 while engaging with the teeth 22 of the guide plates 20 and 21 under its own weight and the force of the pressing means 4, and is guided to the center between the cutters 6 and 9. . The outer peripheral portion of the log W is finely crushed into chips or sawdust by the cutters 6 and 9. In other words, log W
Since 9 is sandwiched between both sides, the lumber can be accurately and safely lumbered without the axial direction of the lumber being rubbed. As a result, a xylem C appears as shown in FIG.
2 is formed.

As described above, when the raw wood W is sawn, the cutters 6, 9 receive a large weight. That is, it receives a large cutting resistance.
However, even if the raw wood W is bent and there is a difference between these left and right cutting resistances, since the cutters 6 and 9 work while holding the raw wood W, the traveling direction of the raw wood W does not change. The log W is prevented from rotating or swinging about the axial direction by the teeth 22 and does not perform an unexpected operation. For this reason, the reference surfaces R1 and R2 formed along the axial direction do not twist, shift, or reduce accuracy.

Therefore, the reference planes R1 and R2 shown in FIG. 1 can be simultaneously produced with high accuracy and there is no danger during the operation.

[Modification] The present invention is not limited to the above embodiment. For example,
The support means may be an integral U-shaped or V-shaped. The log may be moved directly by a pneumatic or hydraulic cylinder rod. The teeth may be not only triangular but also other shapes as long as they are difficult to sap.

Instead of sending the log in direction B by transport, the first and second
It is also possible to move the processing means in the axial direction of the raw wood for processing.

The removal of the outer peripheral portion such as the bark over the entire circumference of the log can be performed by passing the log through the first and second processing means several times. A tree from which bark has been completely removed in this manner can be used as a material for a log house.

Effects of the Invention According to the present invention, even if pressure is applied by the processing means,
The log is not rotated, preventing the axial deflection, and the log can be accurately and safely lumbered.

Furthermore, since the raw wood can be processed by being sandwiched from both sides, the raw wood can be sawed accurately and safely without the axial direction of the raw wood being shaken during processing. Moreover, since the removed unnecessary portion is crushed, post-processing of the unnecessary portion is easy. As a result, automation of lumber can be promoted.

More specifically, according to the present invention, the log is moved straight along the guide plate while engaging with the teeth of the guide plate under its own weight and the force of the pressing means, and the center between the pair of cutters is moved. The outer part of the raw wood is finely crushed into chips and sawdust by both cutters.At that time, the raw wood is processed with both cutters sandwiching both sides, so that it is accurate, safe, and It is possible to perform lumbering without causing any deviation in the axial direction. Thus, a desired reference plane is accurately and easily formed.

When the log is thus sawn, the log is subjected to a large weight of the cutter, that is, a large cutting resistance. In particular, for example, when the log is bent, a difference occurs between these left and right cutting resistances. However, since the pair of cutters process the log while sandwiching it, the traveling direction of the log does not change. The logs prevent rotation and runout about the axial direction by the teeth. For this reason, the reference plane formed along the axial direction does not twist, shift, or reduce accuracy. Therefore, a pair of reference planes can be simultaneously formed with high accuracy. Moreover, there are various practically remarkable effects that there is no danger during the operation.

[Brief description of the drawings]

FIG. 1 is a view showing a sawn lumber, FIG. 2 is a perspective view showing a sawmill according to the present invention, FIG. 3 is a plan view showing the entire sawmill, and FIG. 4 is an end view of the sawmill. FIG. 5, FIG. 5 is a diagram showing details of an end portion of a sawmill, FIG. 6 is a side view showing a state in which a log is being pushed by a pressing plate, FIG. FIG. 8 is a perspective view showing a state where a log is processed by the first processing means and the second processing means. 1,2 ... Processing means 3 ... Support means 4 ... Pressurizing means

Claims (1)

(57) [Claims] In a sawmill for forming a pair of reference surfaces (R1, R2) on a log (W), an outer peripheral portion of the log (W) is crushed and processed to form the pair of reference surfaces (R1, R2). ) Are formed at the same time, and a pair of cutters (6, 9) are arranged to face each other, and a pair of long guide plates (20, 9) pass through these cutters (6, 9).
21) is arranged, and a plurality of teeth (22) are formed on the upper surface of each of these guide plates (20, 21), and these teeth (22) are formed in grooves along the moving direction of the log (W). There is provided a pressurizing means (4) which extends long and presses the raw wood (W) placed on the guide plates (20, 21) downward, and the raw wood (W) is provided by the transport means (2).
3) is transported from the upstream side to the downstream side of the guide plate (20, 21), and at this time, the log (W) receives its own weight and the force of the pressing means (4), and The rotation is prevented by meshing with the teeth (22), and the log (W) is guided by the guide plates (20, 21).
Machine that slides on the teeth (22) and moves straight, and is finely crushed with both sides of the log (W) sandwiched by a pair of cutters (6, 9). .