JPS5944201B2 - Double-sided grinding device - Google Patents

Description

[Detailed description of the invention] When sawing small diameter wood into square lumber by sawing both sides with a pair of circular saws,
Because small-diameter trees have curved edges and edges, the wood itself or its backboard may be bent or twisted.

Therefore, even though the saw teeth have a set edge, if the plate surfaces of opposing circular saws are parallel, that is, if a pair of circular saws are mounted on the same axis, the bent or twisted material Or, the back plate is pressed against the plate surface of the circular saw, causing the saw to generate heat, causing the material to bend and saw, and the saw to swing as well, making it impossible to bend or saw the material.

Furthermore, even if there is no bend in sawing, the larger the diameter of the saw, the more inherent runout occurs, which can leave marks from the teeth on the sawn surface of the product, resulting in an abnormal sawn surface and significantly reducing the value of the product. There were drawbacks.

The purpose of the present invention is to improve the above-mentioned drawbacks, and to form a pair of parallel sawn surfaces on the left and right sides of the wood, a pair of horizontal axes are inserted from both the left and right sides with respect to the relative movement path of the wood. In a device in which the circular saws are mounted on opposite ends of their horizontal shafts with their plate surfaces perpendicular to the axial direction, each of the circular saws is At the same time, the outer surface of the back split plate provided on the return side of each circular saw is attached to the tip of the return side of the saw blade. Outside: It is characterized by protruding outward.

An embodiment of the present invention will be described with reference to the drawings. A pair of left and right saw stands 1, 1 are supported on a pair of front and rear horizontal shafts 3.3 of a machine frame 2 so as to be laterally movable. , 1 are connected to a walking shaft 4 having screws in opposite directions on the left and right halves, respectively, through nuts in opposite directions, so that when the walking motor rotates the walking shaft 4 in the forward and reverse directions, the saw stand 1 .

Reference numeral 5 denotes a rail made of I-shaped steel in the front and rear direction provided between the saw stands 1 and 1, and the material feeding cart 6 is connected to the roller receivers 8a, 8a.
It is mounted so as to be movable in the front and rear directions via rollers 8b and 8b, and is connected to a chain 9 that rotates in forward and reverse directions.
A plurality of receivers 10 are fixed to the upper surface of the material transport cart 6 at appropriate intervals, and the end presser 11 provided between adjacent receivers 10 and 10 is attached to the upper surface of the material transport cart 6. Although it may be fixed to the upper surface, as shown in FIG.
1, which is pivotally mounted on a material transport trolley 6 so that it can rise and fall freely, and one of them is used by standing up depending on the length of the material, and the wood has approximately constant standard dimensions. However, its length does not necessarily have to be exactly constant.

In such a case, the butt end presser supplementary body 11a having a protrusion that is inserted into the grooves before and after the undulating butt end presser body 1.10 is removably fitted to the fore end presser body 11.

Reference numeral 12 denotes a log posture adjustment stand provided on the front side of the saw stands 1 and 1 of the material feeding cart 6, and is shown in FIGS. 1, 2, and 6.
As shown in the figure, a pair of left and right support arms 15.15 are installed at the front and rear of the base plate 14, which is raised and lowered by an air cylinder 13, and a roller 16.16 is pivotally attached to the upper end of the support arms 15.15. When placing the log on the metal plate 10.10, first hold the log on the front and rear rollers 16, 16. Determine the sawing posture while checking the bends, etc., and then place the log on the receivers io and io to the desired height (when sawing the first two sides, cut the log into the receiver with the curved part or node in the middle). (so as not to come into contact with the wood) and then stop it with the wood end presser 11.

If the roller 16 is replaced with a ball fitted into a ball seat, rotation about the center of the wood and movement in the length direction can be achieved.

As shown in FIG. 1, support members 17, 17 are provided on the saw stands 1, 1, and protrude in a cantilevered manner toward the material delivery side. The supported horizontal shafts 18 and 18 are deviated such that the outer side and the inner side are slightly deviated in the material feeding direction as shown in FIG.
As a result, a pair of left and right circular saws 19, 19, whose plate surfaces are screwed onto the opposing inner ends of their horizontal shafts 18, 18 perpendicular to the axial direction, can cut as shown in FIG. The inner width of the sawtooth on the side is A, the inner width on the return side is B, and the outer width is C. 1. Circular saw 19.1 facing the return side of the circular saw 19.19 above
If the width of the back split plate 21 that moves laterally following the step of step 9 is D, and the width of the sawn material is N+2D=C', then A≦X B, C C'. Become.

The receivers 10.10 are short pieces placed at intervals, so if there are bends or knots in the material, the receivers 10.10 are placed next to each other.
If it is in between, the stability of the material will be improved.

Since the present invention is constructed as described above, even if the wood has a bend or a dent, and the sawn product or the back board is twisted or bent, it will not be pressed against the board surface of the saw.

Therefore, the saw does not generate heat or shake too much, which makes it impossible to bend and saw the material, and the sawing work can be carried out smoothly and accurately.

In addition, there is almost no trace of the turning teeth, and a product with a beautiful sawn surface and high commercial value can be obtained.

Note that 20 in the drawing is a motor.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view, Fig. 2 is a plan view, Fig. 3 is a cross-sectional view of the material transport truck and its attached parts, and Fig. 4 is a main part. Fig. 5a is a side view showing another example of the butt end receiver, Fig. 5 is A-A in the same figure.
The sectional view and FIG. 6 are front views of the attitude adjustment table. 1... Saw stand, 6... Material feeding cart, 10... Receiver, 1
1... Wood end presser body, 12... Posture adjustment table, 18...
・Horizontal axis, 19...Circular saw.

Claims (1)

[Claims] 1 In order to form a pair of parallel sawn surfaces on the left and right sides of the wood, a pair of horizontal shafts are supported so as to face each other from both the left and right sides with respect to the relative moving path of the wood, and a circular saw is attached to the opposite ends of the horizontal shafts. In a device in which both of the horizontal shafts are mounted with the plate surfaces perpendicular to the axis direction, the return side of each circular saw is deviated outward from the cutting side with respect to the sawing path. This double-sided sawing device is characterized in that the outer surface of the back split plate provided on the return side of each circular saw is made to protrude outward from the outside of the tip of the return side of the saw teeth.