JPH0518094Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (Field of Industrial Application) The present invention relates to a material feeding device suitable for two-sided sawing in which both sides of the material are simultaneously sawed with a pair of circular saws.

(Prior art) Conventionally, as a two-sided sawing material feeding device, small-diameter logs are placed in contact at four or more points with a base plate provided at least near both ends with a seat plate having an inverted chevron-shaped or circular arc-shaped cutout. A device for sawing wood by placing the base plate on a saw blade and moving it between a pair of circular saws with saw shafts located below the base plate is known from Japanese Patent Publication No. 54-83197.
The material is cut down by the upper half of the circular saw, and the ground powder is collected at the bottom by the rotation of the circular saw.

However, since this device feeds the material using a base plate that has seat plates at both ends with an inverted chevron-shaped or arc-shaped cutout, the saw spacing is limited to 60mm by the base plate.
Since the following dimensions cannot be set, it is not possible to cut a 45mm stud, and since the saw axis is located below the base plate, a large diameter saw is required to saw small diameter wood. There are problems with high power consumption and a significant drop in sawn accuracy due to saw vibration.

(Problems that the invention attempts to solve) This invention was created in view of this current situation.
The material feeding plate moves forward and backward at the height of the saw shaft, and it has a recess for receiving the circular saw fixing nut, so it is possible to cut small corners such as studs, and the circular saw used has a smaller diameter than before. Therefore, it is an object of the present invention to provide an excellent two-sided sawing material feeding device that consumes less power and hardly causes a decrease in sawn material accuracy due to saw runout.

B. Structure of the invention (means for solving problems) The material feeding device for two-sided sawing according to the present invention includes a pair of material feeding guides extending in the material feeding direction, and a pair of saws supported by the material feeding guide. A material feeding plate that moves back and forth between the shafts,
This problem is solved by a structure in which the material feeding plate is provided with recesses provided along the entire length of both sides thereof to accommodate nuts for fixing the circular saw to the saw shaft.

(Function) The material feeding device for two-sided sawing of the present invention configured as described above has a material feeding plate disposed at the position of the saw shaft, a recessed portion on both sides of the material feeding plate, and a recessed portion provided in the recessed portion to the saw shaft. Since the nut that fixes the circular saw is inserted, the material feeding plate moves back and forth between the fixing nuts to smoothly and reliably feed the material, and the axis of the circular saw is aligned almost with the material feeding plate. Because it is centrally located, the area other than the part sandwiched between the flanges of the circular saw can be used for sawing, and the diameter is smaller than that of a conventional circular saw, so it is possible to saw the same product. If you insert the fixing nut of the saw into the recess, you can set the circular saw spacing to 45 mm or less, and
It is possible to remove studs from small diameter thinned wood that has no use value.

(Example) Hereinafter, an example of the material feeding device for two-sided sawing according to the present invention will be described based on the drawings.

FIG. 1 is a side view of a sawmill employing the device according to the present invention. FIG. 2 is a sectional view taken along line A-A in FIG. 1. FIG. 3 is an enlarged side view showing the main parts of the above without the side cover, and FIG. 4 is an enlarged sectional view showing the state in which the material feeding plate is supported by the support plate. FIG. 5 is an enlarged sectional view showing the relationship between the material feeding plate and the saw shaft.

In the figure, 1 is a portable sawmill for field sawing, which is constructed into a rectangular frame with a material feeding path in the center as shown in Figure 2, and it runs perpendicularly to the left and right of this material feeding path. Horizontal guides 2, 2 are provided so that the horizontal guides 2, 2 are supported by a pair of movable saw stands 4, 4 whose corresponding intervals are adjusted by a known walking mechanism 3. A pair of circular saws 5, 5 are provided inside, supported by saw shafts 6, 6, so that these circular saws 5, 5 can double-side saw the material.

Reference numeral 7 denotes an elongated material feeding plate that advances and retreats between the pair of saw shafts 4 and 4 to feed the material 8. As shown in FIG. A series of horizontal material feeding guides 10, 10, which are provided with joints 9, 9 and can be separated from the joints 9, 9 during transportation, are formed as shown in FIGS. 4 and 5. It is movably engaged with the sliding groove 11, and the width of the material feeding plate 7 is formed to be slightly narrower than the dimension of the stud, 45 mm.

Reference numerals 12, 12 are recesses provided over the entire length of both sides of the material feeding plate 7, and nuts 13, 13 for fixing the circular saws 5, 5 to the saw shafts 6, 6 are provided as shown in FIG. The material feeding plate 7 is formed so as to be inserted therein, so that the forwarding and retreating of the material feeding plate 7 can be performed smoothly without causing interference with the nuts 13, 13, and the interval between the circular saws 5, 5 is made to be equal to or less than the dimension of the stud. It is made so that it can be narrowed down.

15, 15 and 16, 16 are rollers that support the material feeding plate 7, and the rollers 15, 15 are arranged so that their upper circumferential surfaces are on the inside of the material feeding guides 10, 10 and above the recesses 12, 12, as shown in FIG. Attach it so that it touches the edge,
The material feeding plate 7 is subjected to such a vertical load, and the roller 1
6 and 16 are attached to the material feeding guides 10 and 10 so as to sandwich the upper part of the material feeding plate 7 on the inner circumferential surface to prevent the material feeding plate 7 from wobbling laterally and to allow the material feeding plate 7 to move smoothly and easily in a straight line. It is designed to allow forward and backward movement.

Reference numerals 17 and 18 denote gripping members for the material 8 attached as shown in FIG.
The other gripping member 18 is connected to a piston rod 20 of a cylinder 19 fixed to the material feeding member 7, so that it can be adjusted forward and backward.

Reference numeral 21 designates a chain for advancing and retracting the material feeding plate 7. Its both ends are tied to the front and rear lower portions of the material feeding plate 7 as is known in the art, and the middle part is connected to the drive wheel 23 as shown in FIG. , 22 so that a sufficient wrapping angle can be obtained.

Reference numeral 25 denotes a friction wheel fixed on the same shaft 24 as the chain wheel 23, and as shown in FIG. When brought into contact, the friction wheel 25 is rotated in forward and reverse directions, rotating the chain 21 in the forward and backward directions, and moving the material feeding plate 7 forward and backward to feed and return the material.

Reference numeral 28 denotes an engine mounted on the machine body 1, and a chain 2 for moving the circular saws 5, 5 and the material feeding plate 7 back and forth.
1. Exhaust fan 29 for discharging ground powder and cylinder 1
The compressor 30 and the like that supply pressurized air to the lumber 9 are driven, so that sawing can be carried out at lumber production sites, lumber collection sites, etc. where electricity cannot be obtained.

It goes without saying that this device can be used not only for the on-site sawmill powered by an engine as described above, but also for a factory sawmill powered by a motor.

In the material feeding device having the above-mentioned configuration, the circular saws 5, 5 are attached to the saw shafts 6, 6 supported by the saw stands 4, 4, and fixed with tightening nuts 13, 13, and the interval between the saw stands 4, 4 is set. When narrowed, the tightening nuts 13, 13 are accommodated in the recesses 12, 12 provided on both sides of the material feeding plate 7, so that the pair of saw shafts 6, 6 are positioned with the material feeding plate 7 in between. However, it is possible to set the minimum saw spacing to the stud dimension of 45 mm, and since the centers of the circular saws 5, 5 are near the center of the material feeding plate 7, the circular saws 5, 5 can be set to the horizontal guide 2, 2. The part protruding upward is considerably increased compared to the conventional method, and the same product can be obtained with a smaller diameter saw than the conventional method.

C. Effects of the invention As mentioned above, the device of this invention places the material feeding plate at the height of the saw shaft and increases the usable area of the saw, so the same product can be obtained using a smaller diameter saw than before. This is effective in saving power and improving product accuracy.

Since recesses for accommodating circular saw fixing nuts are provided on both sides of the material feeding plate, and the interval between the circular saws can be narrowed to the size of the studs, studs can be removed from thinned wood with a small diameter where the columns cannot be removed.

Since the sawing force acts to press the material against the material feeding plate, sawing is carried out stably, and the ground powder falls in a lump at the bottom, making it easy to collect it.

This has a special effect.

[Brief explanation of the drawing]

FIG. 1 is a side view of a sawmill employing the device according to the present invention. FIG. 2 is a sectional view taken along line A-A in FIG. 1. FIG. 3 is an enlarged side view showing the main parts of the same as above, with the side cover omitted. FIG. 4 is an enlarged sectional view showing how the material feeding plate is supported by the material feeding guide. FIG. 5 is an enlarged sectional view showing the relationship between the material feeding plate and the saw shaft. 10,10...Pair of material feeding guides, 6,6...
Saw shaft, 5, 5... Circular saw, 7... Material feeding plate, 12, 1
2... recess, 13, 13... fixing nut.

Claims (1)

[Scope of utility model registration request] A pair of material feeding guides extending in the material feeding direction, a material feeding plate supported by the material feeding guides and moving back and forth between the pair of saw shafts, and a circular saw attached to the saw shafts along the entire length of both sides of the material feeding plate. A material feeding device for two-sided sawing, characterized in that it is provided with a recess provided to accommodate a nut to be fixed.