JPH0547344B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cylindrical body feeding device that is used in a peeling device for peeling raw materials to obtain wood, and sequentially supplies raw materials.

[Conventional technology and its problems] Conventionally, for example, in the case of a device for debarking logs, there is a dry method in which the bark is removed by driving a cutter blade, or a hydraulic method in which the bark is removed by spraying high-pressure water. In some cases, the impact of the cutter blade frequently causes fuzz on the cut surface, resulting in an undesirable rough surface of the wood, and the formation of dust during pulp production, resulting in a decrease in yield. For this reason, hydraulic peeling devices are often used. In this debarking device, it is necessary to feed logs to a nozzle that sprays high-pressure water, and for this reason, a log feeding device is built into the debarking device. This feeding device consists of a plurality of rollers arranged at an angle, and has a structure that feeds logs while rotating them.

This kind of feeding device has no problem if the log is straight, but logs generally have curved parts depending on the growing environment, and these curved parts are
The center of rotation changes suddenly compared to other straight parts. When this sudden change in rotation occurs, the time during which high-pressure water is sprayed at a predetermined location becomes shorter, making it difficult to peel off the bark, resulting in the problem that bark remains in some areas.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a cylindrical body feeding device that can satisfactorily convey a cylindrical body such as a curved log and perform incidental work such as peeling. shall be.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a method that is arranged on a supply path of a cylindrical body that is fed in the length direction and abuts at at least three points on the circumference of the cylindrical body. The apparatus comprises three rollers that support the cylindrical body, an urging means that energizes each of the rollers, and a driving means that rotates each roller so as to feed the cylindrical body in the length direction. The roller has a roller, an urging means for urging the roller, and a driving means for rotating the roller, which are attached to a housing as a pair, and by making each housing rotatable, the direction and contact angle can be adjusted. It is characterized by

[Operation] Since the present invention is configured as described above, the direction and contact angle of each roller can be adjusted by rotating each housing. Therefore, when the rotating surface of the roller is in the same direction as the feeding direction of the cylindrical body, the roller supports the cylindrical body without rotating it and transports it at a predetermined speed, and the rotating surface is perpendicular to the feeding direction of the cylindrical body. In the case of the direction, the cylindrical body is only supported in a rotating state and no supply is performed. Moreover, when the rotational surface of the roller is in the middle of these, it is possible to feed the cylindrical body in its length direction while rotating it.

Furthermore, since each roller is energized by the energizing means, it can be accommodated even if the diameter changes, and even if the cylindrical body has a curved portion, the center point can always be supported without moving.

[Example] The present invention will be specifically described below with reference to the accompanying drawings.

FIG. 1 is a front view of one embodiment of the present invention, FIG. 2 is a front view of a modified use thereof, and FIG. 3 is a view taken along the - line in FIG. 1 showing a state of use. This embodiment is applied to log A as a cylindrical body to be transported, and is used by being incorporated into a peeling device that peels the bark of log A. For log A, three rollers 1a, 1 are placed on the circumference of log A.
b and 1c are arranged so as to be in contact with each other. For example, tires are used for the rollers 1a, 1b, and 1c, and the rollers 1a, 1b, and 1c are moved around the log A so that their peripheral surfaces are in rolling contact with the log A.
They are arranged on the supply path of the log A, and are located at approximately equal intervals with respect to the center point of the log A. These rollers 1
The cylinders a, 1b, and 1c are energized so as to always come into contact with the log A by cylinders 2a, 2b, and 2c operated by pneumatic or hydraulic pressure. That is, the cylinders 2a, 2b, and 2c serve as urging means for urging the rollers 1a, 1b, and 1c to come into contact with the log, respectively, and thereby, as described later, the center point of the log A is moved. We are providing support that would not be possible. The energizing structure in this case is the piston rod 3a of each cylinder 2a, 2b, 2c.
This is done by branching the tips of the rollers 3b and 3c into two, and the branched tips straddling each roller 1a, 1b, 1c and engaging the roller shafts 4a, 4b, 4c. In addition, each roller 1a, 1b,
Sprockets 5a, 5b, 5c are attached to the left and right sides of the roller shafts 4a, 4b, 4c of 1c, respectively, and each sprocket 5a, 5b, 5c is connected to an endless transmission means 6a, such as a chain or a V-belt.
6b and 6c are multiplied. This transmission means 6
a, 6b, 6c are support frames 8a, 8b, 8, respectively
It is hung on the output shaft of drive sources 7a, 7b, 7c (not shown) such as motors attached to the drive source 7a, 7b, 7c (not shown), and when the drive sources 7a, 7b, 7c are activated, the rotation is transferred to the transmission means. 6a, 6b, 6c, and each roller 1a, via roller shafts 4a, 4b, 4c.
1b, 1c and the rollers 1a, 1b, 1c
is starting to rotate. These rollers 1
The rotations of rollers a, 1b, and 1c are adjusted in advance to be at the same speed, so that log A is fed in its length direction at the same speed as the circumferential speed of rollers 1a, 1b, and 1c without rotating. . Here, in FIG. 2, the direction in which each roller 1a, 1b, 1c is perpendicular to that in FIG. Log A by simply supporting it while rotating it.
It does not act to provide propulsion to. These are rollers 1a, 1b, 1c, cylinders 2a, 2b,
2c, each unit including support frames 8a, 8b, 8c, etc. is attached to a frame (not shown), and this frame is made rotatable with respect to the direction of propulsion of log A, as shown in FIG. In the case of , the supply speed of log A is 0, and the log is supported at a fixed point.

It is also possible to adjust the rotating surfaces of the rollers 1a, 1b, and 1c to have a predetermined angle (0 to 90 degrees) with the supply direction of the raw wood A, that is, in the middle of FIGS. 1 and 2. In this case, in order to impart rotational force and propulsive force in the length direction to log A,
Log A can be fed while being rotated.

The three rollers 1a, 1b, and 1c are all designed to roll in contact with the log A on the same circumferential line, and in addition to this one set of rollers, there is another roller group that rotates around the log A. is provided in the supply direction.
As shown in FIG. 3, the other roller group is provided upstream of the roller group consisting of rollers 1a, 1b, and 1c in the supply direction of log A, and includes rollers 10a (not shown) and 10b. , 10c, cylinders 20a (not shown) 20b, 20c that urge these rollers to come into contact with log A, and a drive source (not shown) that rotates the rollers. Note that this other set of rollers is roller 1.
Since it has the same structure and the same function as the roller group consisting of a, 1b, and 1c, its explanation will be omitted.
In Figure 3, 9 is a nozzle that sprays water at a pressure of 100 to 200 kg/cm ² onto log A, and the bark is peeled off from log A by spraying high-pressure water to obtain wood. be. This nozzle 9 is placed 4 times on the circumference of log A.
~10 units, preferably 8 to 9 units, are arranged at equal intervals.

Next, the operation of this embodiment will be explained with reference to FIG.

Rollers 1a, 1b, 1c and 1 of each roller group
The circumferential surfaces of 0a, 10b, and 10c are parallel to the supply direction of the raw wood A, and are rotated by their respective drive sources while contacting the circumferential surface of the raw wood A. As a result, the log A is fed in the direction of the arrow, and its skin is stripped by high pressure water from the nozzle 9. During this feeding, if the bent part of the log A reaches the roller group, for example, the downstream roller group, each roller 1
Since a, 1b, and 1c are energized in the direction of the log A by the cylinders 2a, 2b, and 2c, they move in the radial direction of the log A depending on the degree of curvature of the bent portion and the direction of the bend. In this embodiment, since the curved portion is on the right side with respect to the supply direction, the roller 1c advances in the direction of the log A, and the roller 1b retreats. Even through these movements, the rollers 1b and 1c maintain contact with the log A, so that the center point of the log A is always maintained at a fixed position. Therefore, the high-pressure water from the nozzle 9 is always sprayed at a constant rate, so that peeling can be performed reliably.

The present invention is not limited to the above embodiments, and various modifications can be made. Although the above embodiment was applied to a log peeling device, the present invention can be used to convey other objects as long as the object to be supplied is a cylindrical object. Moreover, the roller group consisting of three rollers may be one group or three or more groups. Furthermore, a spring may be used as a biasing means for biasing the roller toward the cylindrical body, or a spring and a cylinder may be combined.

[Effects of the Invention] As explained above, in the present invention, the cylindrical body is fed while being supported by the three rollers energized so as to come into contact with the cylindrical body, so that the cylindrical body has no curved portion. Even if there is a problem, the center point can be supported without shifting.

In addition, since the direction and contact angle of the three rollers with respect to the cylindrical body can be adjusted, when the rotating surface of the rollers is in the same direction as the feeding direction of the cylindrical body, the rollers cannot rotate the cylindrical body. If the rotating surface is perpendicular to the feeding direction of the cylindrical body, the cylindrical body is only supported in a rotating state without being fed, and the rotating surface of the roller is In this case, the cylindrical body can be transported and supplied in its length direction while being rotated.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a front view of an example of use, and FIGS. 3a and 3b are views taken along the - line in FIG. 1 showing an operating state. 1a, 1b, 1c...Roller, 2a, 2b, 2c
...Cylinder (energizing means), 7a, 7b, 7c...Driving means, A...Log (cylindrical body).

Claims (1)

[Scope of Claims] 1. Three rollers disposed on a supply path of the cylindrical body supplied in the length direction and supporting the cylindrical body by abutting at least three points on the circumference of the cylindrical body; The three rollers include a biasing device that biases each roller to maintain a state of contact with the body, and a drive device that rotates each of the rollers, and the three rollers have a biasing device that biases each roller to maintain a state of contact with the body. A cylindrical body feeding device characterized in that a drive means for rotating a roller and a drive means for rotating a roller are attached to a housing as a pair, and each housing is rotatable so that the direction and the contact angle can be adjusted.