JPH0321927Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a device for processing logs used for log houses into cylindrical shapes.

[Prior Art] Log houses have walls constructed by stacking logs processed into cylindrical shapes. Buildings with this structure have an extremely beautiful exterior that is unique to wood, and the wood absorbs and releases moisture, creating a comfortable indoor environment. However, log houses have the disadvantage that rainwater can easily enter if they are poorly constructed. This is because a large number of logs are stacked vertically to form a wall surface, which tends to create gaps between the logs. For this reason, it is important for log houses to be able to effectively prevent rainwater from entering. To achieve this, it is most important to manufacture straight logs. Stacking curved logs has the drawback that no matter how tightly the logs are stacked together, gaps can form over time. It is extremely difficult to process logs into straight cylinders without curves. This is because the raw wood itself is curved, and the total length of the log is quite long, several meters or more. A device that rotates raw wood is used as a device for processing raw wood into a cylindrical shape. This device has the advantage of being able to process small pieces of wood into cylindrical shapes into straight lines. However, it cannot be used to process logs for log houses. This is because the logs are thick and long, so the rotation speed cannot be increased. When the logs for a log house are rotated at high speed, the heavy and unbalanced logs vibrate violently. A device for processing logs for a log house that avoids this drawback is described in US Pat. No. 4,067,368. The apparatus described in this specification places both ends of the log on a trolley and transports it. While the logs are being transported, a rotating blade is installed to process the top half of the logs into a cylindrical shape. The tip edge of the rotary blade moves vertically across the surface of the log to scrape the log. Further, Japanese Utility Model Application Publication No. 51-61576 describes an apparatus for processing square timber into a cylindrical shape. This device is equipped with a nozzle for holding and transferring the square timbers on the raw wood supply side. The square material that has passed through the mouthpiece is processed into a cylindrical shape using a rotating blade. The wood, which has been processed into a cylindrical shape, is sandwiched between rollers and pulled out.

[Problem that the idea aims to solve]

The log processing device for a log house described in US Pat. No. 4,067,368 has the disadvantage that it cannot process logs into straight lines. This is because both ends are held and the upper half of the log is pressed down from above to cut it into a semi-cylindrical shape. Logs processed into cylinders in this state have the disadvantage of becoming thinner in the center. The reason for this is that when the central part of the log is pressed and scraped by the rotary blade, the central part of the log is pressed by the rotary blade and sag somewhat. For this reason, the log processing apparatus with this structure has the disadvantage that it cannot process logs into a perfect circle and an accurate straight line. Furthermore, the apparatus described in Japanese Utility Model Application Publication No. 51-61576 also has the disadvantage that it cannot accurately straighten logs. The log processed by this device is curved to match the shape of the log, as shown in Figure 5. The reason why logs are curved is because the processed logs are sandwiched between rollers and transported. This device was developed with the aim of solving these drawbacks of conventional equipment.The important purpose of this device is to be able to process curved logs into straight lines with high precision, and to To provide a round bar processing device that can minimize bending of a round bar.

[Means to solve conventional problems]

In order to achieve the above-mentioned object, the round bar processing device for log houses of this invention has the following configuration. (a) The round bar processing device includes means for holding a raw wood A, and a rotary blade 1 that rotates along the outer periphery of the raw wood A held by the holding means. (b) The holding means includes an end support member 2 that presses both ends of the log A to sandwich and hold it. (c) The rotary blade 1 is provided on a movable table 16. (d) The movable table 16 is disposed so as to be freely movable along a guide rail 15 disposed parallel to the raw wood held by the end support member 2. (e) A positioning ring 3 is disposed behind the rotary blade 1 and concentrically with the rotary blade 1. (f) The inner diameter of the positioning ring 3 is adjusted to be approximately equal to the cutting inner diameter of the rotary blade 1. (g) The positioning ring 3 is fixed to the movable table 16 so as not to rotate. (h) The rotary blade 1 is rotatably disposed on the movable table 16 via a bearing.

[Effect]

The device for processing logs into logs for log houses of this invention processes logs into logs under the following conditions. Both ends of the log A are clamped and fixed by end support members 2, which are holding means. A moving table 16 is moved along a guide rail 15 while rotating a rotary blade 1. The rotary blade 1 scrapes the surface of the fixed raw wood A and processes it into a cylindrical shape. The log processed into a cylindrical shape is placed in the positioning ring 3.
inserted into. The inner diameter of the positioning ring 3 is adjusted to be approximately equal to the inner diameter of the rotary blade 1. Positioning ring 3 approximately equal to the inner diameter of the rotary blade 1
However, while holding a log processed into a cylindrical shape, the rotary blade 1 processes the log into a cylindrical shape. That is, the device for processing round logs for log houses of this invention holds the log at three points: both ends and the vicinity of the rotary blade, when the rotary blade 1 processes the log into a cylinder. Further, the rotary blade 1 linearly moves the raw wood fixed by the holding means to process it into a cylinder.

[Preferred embodiment]

An embodiment of this invention will be described below based on the drawings. However, the embodiments shown below are illustrative of a device for embodying the technical idea of this invention.
In the device of this invention, the materials, shapes, structures, and arrangements of the component parts are not limited to the following structures. Various modifications may be made to the device of this invention within the scope of the claims for utility model registration. Further, in this specification, numbers corresponding to the members shown in the embodiments are added to the members shown in the claims for utility model registration so that the claims for utility model registration can be easily understood. However, the members described in the claims for utility model registration are by no means limited to the members shown in the examples. The round bar processing apparatus for raw wood A shown in FIGS. 1 and 2 includes: a means for holding the raw wood A; a rotary blade 1 that rotates along the outer periphery of the raw wood A held by the holding means;
A positioning ring 3 is provided behind the rotary blade. The holding means is composed of end support members 2 that clamp both ends of the log A. The end support member 2 supports the log A so that it cannot move in the radial direction so that the log A does not shift during cutting. The end support member 2 in FIG. 1 includes two pressing shafts 4 and 5 that press both ends of the log A in the axial direction, and a pressing cylinder 6 that presses the right pressing shaft 4. The pressing shafts 4 and 5 are provided with protrusions at their tips that are pushed into the log A so as to press and hold the center portions of both ends of the log A, and the pressing shafts 4 and 5 are arranged linearly with respect to each other. The left pressing shaft 5 is fixed to the frame 7, and the right pressing shaft 4 is supported so as to be able to move somewhat in the axial direction.
It is connected to the tip of the rod. The tip portions of the two pressing shafts 4 and 5 are designed so that they can completely cut the raw wood A into a cylindrical shape up to both ends, that is, so that they can be inserted into the center of the rotary blade 1 and the positioning ring 3 without contact. , is formed into a cylindrical shape that is thinner than the center hole of the rotary blade 1 and the positioning ring 3. The round bar processing apparatus shown in FIGS. 1 and 2 is equipped with means for supplying raw wood A to the end support member 2. The round bar processing apparatus shown in FIGS.
This supplying means supplies the raw wood A to the end support member 2 from a feeding table 8 for the raw wood A using a clamping arm 9. Therefore, the clamping arm 9 is attached to the upper and lower tables 10, and the upper and lower tables 10 are attached to the horizontal moving table 1.
1, and the horizontal moving table 11 is vertically translated in parallel via an up-down cylinder 12 and a guide 13. This supplying means moves the log A in the direction shown by the arrow in FIG. 2 and supplies the log A from the feeding table 8 to the end support member 2. That is, the upper and lower tables 10 descend and the clamping arms 9 clamp the log A on the feeding table, and then the clamping arms 9 hold the log A in a clamped state, and as the upper and lower tables 10 rise, , horizontal moving table 1
1 moves horizontally, the upper and lower platforms 10 descend, and the log A
is fed into the center of the end support member 2, and in this state, the pressing shaft of the end support member 2 is pressed against the center of the log A and clamps it, and then the clamp arm 9 opens and the log A is clamped. is released, and the vertical table 10 rises. After the raw wood A is processed into a cylindrical shape, the upper and lower tables 10
descends and clamps the raw wood A with the clamping arm 9, and then ascends in the clamped state and carries it to the delivery table 14. The rotary blade 1 and the positioning ring 3 are attached to a movable table that moves along a guide rail 15 of the frame. The movable table 16 is moved along the guide rail 15 by a motor (not shown), and the rotary blade 1 cuts the log A into a cylindrical shape while moving. Therefore, the guide rail 15 is provided to extend in the axial direction of the log A held between the end support members 2, and the moving platform moves in the axial direction of the log A. The rotary blade 1 is rotatably supported on a movable table 16,
This rotates and processes log A into a cylinder. FIG. 3 shows how the rotary blade 1 and positioning ring 3 are attached to the movable table. In this figure, the rotary blade 1 is screwed to the tip of a rotary cylinder 18 that has a pulley groove 17 on its outer periphery.
is rotatably supported on the outer periphery of the fixed cylinder 20 via a bearing 19. The fixed tube 20 has a through hole larger than the maximum outer diameter of the raw wood A to be cut, for example, a through hole with an inner diameter of 150 to 300 mmφ, so that the raw wood A cut into a cylindrical shape can pass through the interior without contacting the fixed cylinder 20. It is perforated. This fixed cylinder 20 is fixed to the movable table main body via a fixed arm 21. In the pulley groove 17 of the rotary tube to which the rotary blade 1 is fixed, a V-belt 2 is attached as shown by the chain line in FIG.
2 is hung, and this V-belt 22 is connected to the motor 23.
The rotary blade 1 is rotated by the drive. As the rotary blade 1, any blade that can rotate itself and cut the raw wood A into a cylindrical shape can be used, for example, as shown in FIG. 3, a blade whose inner diameter gradually decreases toward the rear can be used. In the fixed cylinder 20, there is a positioning ring adjacent to the right side of the rotary blade 1, as the rotary blade 1 advances from right to left in FIG. 3 to cut the log A. 3 is fixed. The positioning ring 3 has a circular through hole, and this through hole is inserted into the log A that has been cut into a cylindrical shape with the rotary blade 1.
For example, the cutting inner diameter of the rotary blade 1 is approximately equal to the cutting inner diameter of the rotary blade 1, so that the log A can be passed easily and the log A can be prevented from shifting in the radial direction during cutting. 0.1~1.0mmφ, preferably 0.3~0.6 than the outer diameter of log A
mmφ is formed larger. This positioning ring 3 is
It is fixed concentrically with the rotary blade 1 so as to accurately hold the center of the circularly cut log A. By the way, the inner diameter of the positioning ring 3 is the same as that of the rotary blade 1.
The smaller the cutting inner diameter of A, the smaller the cut log A.
can be held reliably, but if it is too large, the gap between the log A cut into a cylindrical shape and the positioning ring 3 becomes wide, and the log holding effect of the positioning ring 3 decreases. Therefore, the optimum value of the inner diameter of the positioning ring 3 is usually adjusted within the above range, taking into account the type of wood, the cutting state of the surface of the log A by the rotary blade 1, etc. just,
Depending on the type of wood, the inner diameter of the positioning ring 3 can be made smaller or somewhat larger than the above range. As shown in FIG. 1, the round bar processing apparatus for raw wood A shown in FIGS. While the rotary blade 1 is being rotated, the movable table moves along the log A and processes the log A into a cylindrical shape. When the movable table moves along the log A and the log A is cut into a cylindrical shape, the positioning ring 3 holds the vicinity of the rear of the cylindrical cut portion. Therefore, the log A is reliably held at three points, the cut portion of the rotary blade 1 and both ends, and processed into a straight line. In the round bar processing apparatus for raw wood A shown in FIGS. 1 and 2, the rotary blade 1 and the positioning ring 3 are moved in the axial direction of the raw wood A while the wood is fixed.

[Effect of the idea]

The round bar processing device for log houses of this invention clamps and fixes both ends of the log between end support members. The fixed raw wood is processed into a cylinder using a rotating blade that moves in a straight line. A positioning ring having an inner diameter approximately equal to the cutting inner diameter of the rotary blade is disposed behind the rotary blade. The positioning ring supports the rear of the cut log, and both ends of the log are fixed with end support members. That is, the device for processing round logs for log houses of this invention cuts the logs at both ends and in the vicinity of the cutting part.
The positioning ring, which supports at a point and holds the area close to the cutting part, reliably holds the log at the rear of the cut area with the rotary blade, so the positioning ring support device prevents the log from shifting from the center position of the log. There is no. In other words, the positioning ring linearly moves along the log without being displaced from the center on an imaginary straight line connecting the center of the log fixed by the end support members at both ends. Therefore, the rotary blade cuts the log in a circular shape at the center position on the virtual straight line, and the cut log is
The positioning ring maintains the center position and supplies it to the rotary blade. Therefore, the rotary blade more accurately cuts the raw wood in a circular shape without deviating from the center line on a virtual straight line, and cuts the long raw wood in a straight line accurately. Therefore, as shown in Fig. 4, even if a somewhat crooked log is supplied, the positioning ring will not deviate from the center position on the virtual straight line of the log and will rotate while accurately supporting the center of the log. feed the blade. In this figure, the solid line indicates a log that has been processed into a cylinder, and the chain line indicates the outer shape of the log. The device for processing round logs for log houses that can process logs in this state minimizes the bending of logs cut into cylindrical shapes, making it possible to produce logs for log houses that can be stacked without gaps. By the way, in the inventor's experiment, the total length was 4m,
When a log whose center part was deviated by 50 mm from the center of an imaginary straight line connecting the centers of both ends was processed into a cylinder with a diameter of 150 mm using the round bar processing device of this invention, the center part was The deviation from the center on the virtual straight line was extremely reduced to only 2 mm.

[Brief explanation of the drawing]

1 and 2 are schematic front and side views of a round bar processing device according to an embodiment of the invention, FIG. 3 is a sectional view showing the attachment part of the rotary blade and the positioning ring, and FIG. 4 5 is a perspective view showing a log processed by the log house round bar processing apparatus of this invention, and FIG. 5 is a perspective view showing a state in which the log is processed by the conventional apparatus. A... Log, 1... Rotating blade, 2... End support member, 3... Positioning ring, 4... Press shaft, 5...
Pressing shaft, 6... Pressing cylinder, 7... Frame, 8... Feeding table, 9... Clamping arm, 10...
Upper and lower table, 11... Horizontal moving table, 12... Upper and lower cylinder, 13... Guide, 14... Delivery table, 15
... Guide rail, 16 ... Moving table, 17 ... Pulley groove, 18 ... Rotating cylinder, 19 ... Bearing, 20
...Fixed tube, 21...Fixed arm, 22...V belt, 23...Motor.

Claims (1)

[Scope of Claim for Utility Model Registration] A round bar processing device for raw wood for log houses having the following configurations (a) to (h). (a) The round bar processing device includes a raw wood holding means and a rotary blade 1 that rotates along the outer periphery of the raw wood held by the holding means. (b) The holding means includes an end support member 2 that presses both ends of the log to sandwich and hold it. (c) The rotary blade 1 is provided on a movable table 16. (d) The movable table 16 is disposed so as to be freely movable along a guide rail 15 disposed parallel to the raw wood held by the end support member 2. (e) A positioning ring 3 is disposed behind the rotary blade 1 and concentrically with the rotary blade 1. (f) The inner diameter of the positioning ring 3 is adjusted to be approximately equal to the cutting inner diameter of the rotary blade 1. The positioning ring 3 is fixed to the movable table 16 so as not to rotate. (h) The rotary blade 1 is rotatably disposed on the movable table 16 via a bearing.