JPH0324902A - Traveling circular saw hair pulling device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hair pulling device for a traveling circular saw that performs groove processing to prevent chipping on the surface of a workpiece prior to cutting. It is applied in the field of processing wood-based processed materials.

(Conventional technology) Hair pulling is recommended to prevent chipping of the surface part when cutting the workpiece, especially the surface part on the exit side of the circular saw, and generally active-drive circular saws are used. This type of cutting equipment was developed using
The one proposed in Japanese Patent No. 9-2238 is well known.

In this conventional processing device, as shown in FIG. 10, during the cutting process, the lower surface of the workpiece W is subjected to dipping (hair-pulling) processing by the secondary circular saw P, and then the main circular saw Q
The entire thickness, including the above-mentioned hair-pulling part, is sawn (cutting process).
It is supposed to be done.

As shown in the figure, this hair-pulling cutting method has a feature that the downward component force at the point of cutting action on the lower and upper end surfaces of the workpiece is small, and therefore no chipping occurs in these areas.

(Problems to be Solved by the Invention) However, since the conventional device uses a positive drive type main and sub circular saw means, the required power is large, and the cutting processing unit including this power device is Upsizing,
This had the disadvantage of increasing costs. In addition, you must pay close attention to matching the position (path) of both circular saws in the running direction from the point where the secondary circular saw makes a deep cut. This is because it appears as a difference in level and significantly reduces the product value.

The present invention provides a traveling circular saw that uses a so-called fixed type blade as a hair-pulling blade, which can be made compact and low-cost, and which can perform accurate hair-pulling processing that always conforms to the cutting line direction of the circular saw. The purpose is to provide a board hair pulling device.

(Means for Solving the Problems) In order to achieve the above object, the hair pulling device for a traveling circular saw of the present invention has the following shape.

That is, the gist of the present invention is that a circular saw protrudes from a saw running slit provided at the cutting edge of a table, and a running circular saw that cuts a workpiece on the table surface by moving and traveling guided by this running slit. In the saw machine, a hair-pulling blade that protrudes from the saw-travel slit onto the table surface is provided on the traveling unit side equipped with the circular saw, and the hair-pulling blade is operated by the side wall of the saw-travel slit. It is designed to guide and set the hair pulling position.

(Function) The hair-pulling blade is activated to protrude from the saw travel slit to the blade mouth, that is, above the table, and corresponds to the back side of the workpiece.
When the traveling unit is moved in the required cutting feed direction, the hair pulling blade moves in the same cutting feed direction in the saw travel slit, so that accurate hair pulling processing can be performed that is compatible with the cutting line direction of the circular saw. The hair-pulling blade that protrudes from the narrow saw running slit is thin in the width direction and has low structural strength, but the guiding action of the side wall of the running slit suppresses swinging and swimming of the cutting edge, resulting in smooth hair-pulling processing. . Also, since the hair pulling blade is not equipped with active drive means, it can be incorporated into a compact oval. (Example) One example of the hair pulling device for a traveling circular saw according to the present invention will be specifically described.

Figures 1 and 2 show a rear view and a side view of a vertical traveling circular saw machine in which the traveling unit of the circular saw moves in the vertical direction. In the figure, A is a trapezoid-shaped main body frame l is an inclined table attached to the front frame 2a of the main body frame A, Cutting edge section provided vertically at approximately the center The cutting edge section 3 described above is provided in connection with the table 1, and has a uniform thickness and is made of hard plastic or resin in an elliptical shape. Reference numeral 4 denotes a single saw running slit drilled in the center of the blade opening 3, and this saw running slit 4 is shaped by sawing with a circular saw, which will be described later. Further, a horizontal ruler 5 is provided below the table 1 and is perpendicular to the saw running slit 4. This horizontal ruler 5 is provided so as to extend on both the left and right sides with the saw running slit 4 interposed therebetween. Thus, the workpiece W is placed on the horizontal ruler 5 and held with its back side in contact with the table surface.

6 is a connecting frame 2b of the main body frame A which is the back side of the table 1. This guide rail has an H-shaped cross section and has both upper and lower ends fixed to 2C, and is arranged at an appropriate distance from the saw running slit 4 described above. A traveling unit B equipped with a circular saw is engaged with this guide rail 6 so as to be able to move up and down.

That is, in FIGS. 3 and 4, 7 is a saw table 8
10 is a drive motor attached to the saw stand 7 with the rotating shaft 9 horizontal; 10 is a bearing 11 that is concentric with the rotating shaft of the driving motor 8;
An arm rod 12 is rotatably provided on the arm rod 10. A bearing cylinder 13 is provided on the free end of the arm rod 10. A saw shaft 13 is rotatably supported on the arm rod 10. Install circular saw 15. 16 is a pneumatic cylinder connected to the arm rod 10, and when the piston rod is extended, the circular saw 1
5 is projected onto the table surface through the saw travel slit 4, and when the piston rod is retracted, the circular saw 15 is retracted from the table surface. Reference numeral C denotes rotation driving means for the circular saw 15, which is composed of a passive pulley 17 fixed to the saw shaft 13, a driving pulley 18 fixed to the rotary shaft 9, and a transmission belt 19 stretched across both. A dust collection cover 20 is fixed to the saw stand 7 so as to surround the circular saw 15 when the circular saw 15 is in the retracted position.

Next, the elevating and lowering drive means for the traveling unit B will be explained.

21 and 22 are a pair of sprockets attached to the upper and lower ends of the guide rail 6. 23 is the sprocket mentioned above.
This chain 23 is an endless chain stretched between 1 and 22.
Tie one end of the saw to the saw stand 7. 24 is a forward/reverse drive motor linked to the lower sprocket 22 via appropriate transmission means. Then, the chain 23 is driven in the upward and downward directions by forward and reverse rotation of the forward and reverse drive motor 24, thereby transporting the traveling unit B in a desired cutting feed direction.

In addition, a means for holding down the next workpiece W is provided at the front position of the table 1.

Reference numeral 25 indicates a side U-shaped holding frame disposed corresponding to the saw running slit 4. Reference numeral 26 indicates a pair of upper and lower link arms 2 on the holding frame 25.
A presser plate for the workpiece W is attached via 7 and 27. Reference numeral 28 is a cushion pad attached to the contact portion of the workpiece. Reference numeral 29 is a pneumatic cylinder for operating the presser plate 26. Next, the hair pulling means, which is the main part of the present invention, will be explained.

This hair-pulling means is disposed at the lower part of the ta cover 20 in the travel unit B as shown in FIG. Grooves are machined on the back side of the machine. 5 and 6, 30 is a mounting plate provided at the bottom of the dust collection cover 19, 31 is a sliding guide provided in the front and rear direction of the mounting plate 30, 32 is a holder engaged with the slide guide 3l, and 33 is a mounting plate provided at the bottom of the dust collecting cover 19. It is a hair pulling blade that protrudes forward in the center of the holding body 32, and has two cutting edges a,
a, and the interval t is equal to or slightly smaller than the blade width of the circular saw, that is, the width of the saw running slit 4.

The above hair pulling blade 33 is attached and fixed to the holder 32 by a bolt 34, and is replaceable. 35 is a pneumatic cylinder for operating the holding body 32 provided on the mounting plate 30. At the same time, when the piston rod is extended, the cutting edges a, a of the hair-pulling blade 33 are projected onto the blade opening 3 through the saw running slit 4. At the time of protrusion, the hair pulling blade 33 is interposed between both side walls b, b of the saw running slit 4, and the amount of deflection in the left and right direction is regulated. Further, when the piston rod is retracted, the cutting edges a and a sink into the cutting edge part 3. Reference numeral 36 denotes a protrusion regulating member provided at the front end of the holder 32, which comes into contact with the back surface of the blade mouth portion 3 when the piston rod is extended, and prevents the blade edge a. Set the protrusion amount of a.

In the above-mentioned oval, the hair pulling blade 33 has a cutting edge a. This is to ensure that a is in a fixed position within the slit, and the cutting edge is not actively pressed against the side walls b and b. Furthermore, in the above-mentioned ellipse, sliding friction occurs between the protrusion regulating member 36 and the blade mouth portion 3 when the traveling unit moves. Therefore, both members should be made of materials with a small coefficient of friction. As a means for dealing with this sliding friction, the protrusion regulating member side may be of a relocation type as shown in FIGS. 7 and 8.

Further, as shown in the figure, the hair-pulling blade may be a disc-shaped blade whose cutting edge is renewed by transfer.

Incidentally, 37 is a disc-shaped hair pulling blade, 38 and 38 are rolling roller type protrusion regulating members, and 39 is a mounting support shaft.

The structure of the hair pulling device for a traveling circular saw according to the present invention is as described above.

Therefore, when the piston rod of the pneumatic cylinder 29 is actuated in the extending direction, the cutting edges a, a of the hair pulling blade 33 (37) slightly protrude above the blade mouth portion 3 through the saw running slit 4. This amount of protrusion is set to a predetermined dimension by the protrusion regulating member 36 (38) that comes into contact with the back surface of the blade mouth portion 3.

Following this setting of the hair pulling blade, the circular saw 15 for processing is protruded from the saw running slit 4, and the saw table 7 is transferred in the desired cutting direction.
3 (37) comes into contact with the back surface of the workpiece W to perform grooving. The hair pulling blade 33 (37) has a cutting edge a. Since it moves in the running direction with the deflection of a being restricted, it is possible to carry out accurate hair-pulling processing that matches the sawing path of the circular saw 15.

Further, since the workpiece W is firmly pressed against the table surface by the presser plate 26, the hair pulling can be carried out smoothly under constant pressure conditions. Then, since the entire thickness is cut using the back surface which has been brushed as described above as the exit side of the saw, chipping on the back surface side can be prevented.

As mentioned above, when hair pulling is performed using a so-called fixed type blade, the amount of cut into the workpiece W by the blade is very small, and the cutting process is the same as that performed with a single circular saw 15. be. Therefore, there will be no difference in level on the cut surface.

In one embodiment, the pneumatic cylinder 29 is used to cause the hair pulling blade 33 (37) to protrude. However, this actuating member may also be a simple spring member. In terms of design, it is easy to omit the biasing force of this spring member, that is, the means to adjust the pressing force of the hair pulling blade, and the means to release the bias and sink the blade edge into the saw running slit. .

In addition, the amount of protrusion of the hair-pulling blade depends on the thickness accuracy of the tip of the blade, but in order to ensure the reliability of this amount of protrusion, it is necessary to provide a separate guide member at the tip of the blade, or to attach Guide members may be provided on the frame, and the protrusion regulating member may be guided by contacting or engaging with the guide members.

Further, in one embodiment, the protrusion regulating member is configured to constantly contact the cutting edge portion, but the protrusion regulating member can also be regulated by an abutment member (not shown) provided on the traveling unit side. By doing so, it is also possible to release the contact between the above-mentioned protrusion regulating member and the blade mouth portion.

Further, in one embodiment, a traveling circular saw machine in which the traveling unit moves in the vertical direction has been described, but the present invention can also be applied to a well-known horizontally movable traveling circular saw machine without modification.

(Effects of the Invention) As described above in detail, the hair pulling device for a traveling circular saw of the present invention has a so-called fixed hair pulling blade that protrudes from the saw travel slit onto the table surface on the traveling unit side. In addition, the hair pulling blade is guided to the side wall of the saw running slit to set the hair pulling position, and the structure is simple and the traveling unit is compact and low cost. It also has the effect of preventing run-out during machining and allowing the hair-pulling process to always match the sawing path of the circular saw.

In addition, if the measuring wall part of the blade mouth becomes worn out due to long-term use and the saw running slit widens or is partially damaged, close the gap between the blade mouth parts on both sides and grind the joint end. The vehicle will be cut off and the running slit will be updated.

[Brief explanation of drawings]

The drawings show an embodiment of the hair-pulling device for a traveling circular saw according to the present invention, and FIG. 1 is a surface survey of a vertical traveling circular saw equipped with this device. Rear view Figure 3 is a plan view showing the configuration of the traveling unit Figure 4 is a front view Figure 5 is a bottom view showing the configuration of the hair pulling means Figure 6 is a vertical cross-section view Figure 7 is the hair pulling means Fig. 8 is a vertical cross-sectional side view showing another embodiment of the same. Fig. 9 is an explanatory diagram showing the arrangement relationship between the hair-pulling blade and the slit for saw travel. Fig. 10 is a conventional hair-pulling cutting. It is an explanatory diagram of the device.

Claims (1)

[Claims] In a traveling circular saw machine in which a circular saw protrudes from a saw traveling slit provided at the blade end of the table, and a workpiece on the table surface is cut by moving and traveling guided by the traveling slit. A hair pulling blade that protrudes from the saw running slit onto the table surface is provided on the traveling unit side equipped with the circular saw, and this hair pulling blade is guided by the side wall of the saw running slit, and the hair pulling blade is A hair pulling device for a traveling circular saw machine, characterized in that the pulling position can be set.