JPH0213123Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a bark stripping machine for stripping the bark of logs, and more specifically, to an improvement of a log feeding device that feeds and supplies logs to a peeling unit that strips the bark. It is something.

(Prior Art) As described in Japanese Patent Laid-Open No. 50-51843, a conventional log feeding device for a bark peeling machine has a three-way log feeder on the outside of the log feeding path leading to the peeling unit that peels off the bark. The spike rollers are arranged at equal intervals, and the spike rollers are biased toward each other to sandwich the log from three sides and send it to the peeling unit.

(Problems to be Solved by the Invention) The spike roller in the prior art was a drum-shaped roller with a large number of protrusions provided on its surface. These spike rollers are used to feed the logs to the cutter and at the same time fix the logs so that the cutter can strip off the bark. There was a problem in which the log was turned by the pressure of the cutter, making it impossible to strip the bark.

In addition, in the winter in cold regions, the bark of logs may be frozen, so it is better to have the protrusions of the spike rollers with sharp tips for better grip.
If the tip is sharp, it may leave scratches on the wood depending on the log.
There was a problem that the value of the product decreased.

For this reason, it is desirable to use the spike rollers that are most suitable for the angle of the protrusions and the number of spikes planted depending on the tree species and season, but in the conventional technology, it is difficult to replace the rollers once they are installed in the device. Ta.

(Means for Solving the Problems) The present invention has been made to solve the problems of the prior art described above, and is a spike roller in which only the roller portion can be replaced after being incorporated into a log feeding device. This is what we are trying to provide.

In order to achieve the above objective, in this invention, three rotatable spike rollers are installed in the radial direction before and after the peeling unit that strips the bark of logs, and each spike roller can move towards and away from each other. The spike roller is characterized in that a drum with protrusions is detachably attached to a base provided on a driving shaft.

The spike rollers are then used by selecting the optimum angle of the protrusions and number of spikes depending on the species of the log and the season.

(Example) Fig. 1 is a perspective view of a log feeding device according to the present invention;
Fig. 2 is a sectional view of the spike roller, Fig. 3 is a plan view of the entire bark stripping machine equipped with the present invention, Fig. 4 is a front view of Fig. 3 seen from the right side, and Fig. 5 is the same as Fig. 3. FIG.

A peeling unit 3 that is rotationally driven by a motor 2 is disposed in the center of the frame 1, and a log feeding device 4 is provided in front of this peeling unit 3 (on the right side in Figure 3) and behind it (on the left side in Figure 3). , 5 are provided.

The peeling unit 3 is a conventionally known ring barker, and has a plurality of cutter arms 6, 6 pivotally attached to the cutter arms 6, 6.
By swinging and urging the arms 6 toward the inner periphery, the bark of the log is stripped off with the cutters provided at the tips of the cutter arms 6, 6.

Here, the pair of raw wood feeding stations 4 and 5 installed with the peeling unit 3 in between have substantially the same structure, so here they are located on the right side of the peeling unit 3, that is, in front in the raw wood feeding direction. The feeding device will be explained. That is, the frame 1 is provided with a substantially vertical partition wall 7 in which a log passage hole is opened in the center.Three partition walls 7 are provided in this partition wall 7, with three holes centered around the center of the log feed passage (the passage hole). The support shafts 8, 8 are fixed at equal intervals. Further, hollow holders 9, 9 are pivotally attached to each of the support shafts 8, 8, and spike rollers 11, 11 are mounted in the radial direction at the tips of shafts 10, 10 inserted into each holder 9, 9. After being fixed, the arms 12, 12, 13, 13 fixed to each holder 9, 9 are connected to each other via tie rods 14, 14. Then, the tip of the arm 12 of one holder 9 is connected to the partition wall 7.
When the air cylinder 15 is operated, the holders 9, 9 swing around the support shafts 8, 8, and the spike rollers located at the ends of the holders 9, 9 swing around the support shafts 8, 8. 1
1 and 11 can be moved toward and away from each other. 16, 16 are each spike roller 1
This is a motor for rotationally driving 1 and 11.

Further, covers 17, 17 are respectively provided to cover the triangular spaces formed between the tips of the spike rollers 11, 11 and the peripheral surfaces of the spike rollers 11, 11 adjacent to the spike rollers 11, 11. It is provided at the tip of the spike rollers 11, 11. Then, the covers 17, 1
7 are coupled to the holders 9, 9, respectively, so that the holders 9, 9 and the covers 17, 17 can move together.

FIG. 2 shows the details of the spike roller. In the figure, a bearing part 112 provided at the center of a base 111 made of a cylinder with a bottom is fixed to the shaft 10, and a drum 113 with a protrusion is attached to the front of the base 111. An inner edge 1 formed toward the inner side of the end of
14 are joined, and both are removably attached with set screws 115, 115. And a drum with protrusions 11
3 is attached and detached with the cover 17 and the bracket 18 provided in front of the spike roller 11 removed.

The embodiment has the above-mentioned configuration, and first, when the spike rollers 11, 11 are brought close enough to each other to supply logs of small diameter, the triangular shape formed between the adjacent spike rollers 11, 11 The empty spaces are covered by the covers 17, 17. For this reason, the logs are not sent into the empty space, and the three spike rollers 11, 1
1 and 11.

In addition, when the diameter of the raw wood to be supplied increases, the air cylinder 15 is shortened and the holders 9,
9 to the outside and the adjacent spike roller 1
Increase the interval between 1 and 11. As a result, the space formed between the adjacent spike rollers 11, 11 also expands, but since at least a portion of this space is covered with the covers 17, 17, the actual opening of the space is reduced. The width will never be larger than the diameter of the log.

In this way, in either case, the raw wood is not fed into the empty space, and the three spike rollers 11, 11 can reliably hold the raw wood and supply it to the peeling unit 3 accurately.

By the way, the protrusions of the spike roller 11 may become worn out, or depending on the tree species, the protrusions of the drum 113 with other protrusions may become worn out.
When replacing the drum with protrusions fixed to the base 111, remove the bracket 18 provided across the spike roller 11 together with the cover 17, or remove the cover 17 provided at the tip of the spike roller, and then replace the drum with protrusions fixed to the base 111. 113 and replace it with a new one.

(Effects of the invention) In this invention, three rotatable spike rollers are installed in the radial direction before and after the peeling unit, each spike roller can be moved adjacent to each other, and the spike rollers are based on a drum with protrusions. Since the spike rollers are removably attached to the tree, the angle of the protrusions and the number of spikes to be planted can be easily changed and used depending on the tree species and season.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a log feeding device according to the present invention;
Fig. 2 is a sectional view of the spike roller, Fig. 3 is a plan view of the entire bark stripping machine equipped with the present invention, Fig. 4 is a front view of Fig. 3 seen from the right side, and Fig. 5 is the same as Fig. 3. FIG. DESCRIPTION OF SYMBOLS 1... Frame, 2... Motor, 3... Peeling unit, 4, 5... Feeding device, 6... Cutter arm, 7... Bulkhead, 8... Support shaft, 9... Holder, 1
0...Shaft, 11...Spike roller, 11
DESCRIPTION OF SYMBOLS 1... Base, 112... Bearing part, 113... Drum with protrusion, 114... Inner edge, 115... Set screw, 12, 13... Arm, 14... Tie rod, 15... Air cylinder, 16 ...Motor, 1
7...Cover, 18...Bracket.

Claims (1)

[Scope of utility model registration request] Three rotatable spike rollers are installed in the radial direction before and after a peeling unit for stripping the bark of logs, and each spike roller is arranged so that it can move toward and away from each other, and the spike rollers A log feeding device for a bark stripping machine, characterized in that a drum with projections is detachably attached to a base provided on a driving shaft.