JPH07256603A - Circular saw machine - Google Patents

Abstract

PURPOSE:To surely and smoothly conduct an operation of horizontally moving a circular saw blade during the cutting operation of a circular saw machine. CONSTITUTION:A main support link 10 and a disc link 11 are provided on a support member 8 through a shaft 9. A support arm 13 is provided on the main support link 10 through a shaft 12. A circular saw blade 15 is provided on the support arm 13 through a rotating shaft 14. One end of a shaking restriction link 16 is pivotally fixed to a pin 11 a projected on the disc link 11. The other end of the shaking restriction link 16 is pivotally fixed to a pin 13a of the support arm 13. The pin 13a is disposed on a straight line connecting the shaft 12 to the rotating shaft 14. A distance from the shaft 9 to the shaft 12, a distance from the pin 11a of the disc link 11 to the pin 13a of the support arm 13, and a distance from the shaft 12 to the rotating shaft 14 are determined to be equal. A distance from the shaft 9 to the pin 11a is determined to be twice longer than a distance from the shaft 12 to the pin 13a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circular saw machine, and more particularly to a slide type circular saw machine in which a circular saw blade moves in a horizontal direction.

[0002]

2. Description of the Related Art Generally, as a cutting machine, a circular saw machine for rotating a circular saw blade for cutting is widely known. Further, among the circular saw machines, there is a slide type circular saw machine in which a circular saw blade can be moved horizontally and a long cutting length can be machined.

As this slide type circular saw machine, there is one disclosed in Japanese Utility Model Publication No. 4-44321. Figure 1
0 is a diagram showing the circular saw machine described in the above publication. The holder 107 is formed with two through holes 107a and 107a (one of which is not shown).
A guide bar 111 is inserted in each of the shafts so as to be slidable in the axial direction. A circular saw portion 113 holding a circular saw blade 117 is swingably provided on one end of the guide bar 111 via a hinge shaft 114.

However, when the long workpiece 102 is to be cut, the circular saw portion 113 is positioned to the right in the figure, and in this state, the circular saw portion 113 is rotated and positioned downward. Excuse me. And while cutting with the circular saw blade 117,
The slide bar 111 is moved to the left in the figure. As a result, the long workpiece 102 can be cut.

However, in the slide type circular saw machine having the above structure, an expensive linear motion bear rig is used to slide the guide bar 111, or the guide bar 111 is used.
Requires high processing precision and heat treatment. Further, since the slide bar 111 has a certain length, the slide bar 111 is easily bent, and the machining accuracy is deteriorated particularly when the slant cutting is performed. Further, when the slide bar 111 is worn, it is difficult to adjust. Further, when there is an obstacle or the like behind the circular saw machine, it is difficult to perform slide cutting.

Therefore, the applicant of the prior art has proposed a circular saw machine in which a circular saw blade is horizontally moved using a link (Japanese Patent Laid-Open No. 4-366601). FIG. 11 is a diagram showing the circular saw machine described in the above publication. A hinge portion 205 of a pivot 204 provided on the base 201 has one end of a swingable main support link 206 and a fixed link 207 fixed.
And one end of is attached. This main support link 206
To the other end of the support arm 209 via the hinge portion 208.
The central portion of the is swingably provided. An upper cover 212 that covers the circular saw blade 211 is provided at the right end of the support arm 209 in the figure.
A circular saw blade 211 is provided via a rotary shaft 213. Further, the hinge portion 21 is provided on the tip side of the fixed link 207.
A swing restriction link 214, which is shorter than the main support link 206, is swingably provided via 0. A long hole 214a is formed in the swing restriction link 214, and a pin 209a provided on the left end side of the support arm 209 in FIG. 1 is engaged with the long hole 214a. Further, the hinge portion 205 is provided with a coil spring 215,
The main support link 206 is biased clockwise around the hinge portion 205. The coil spring 2 is attached to the hinge portion 208.
16 is provided, and the support arm 209 is attached to the hinge portion 2
It is biased counterclockwise around 08.

Then, the material 203 to be cut is placed on the rotary table 202. Then, the support arm 209 is rotated about the hinge portion 208 against the biasing force of the coil spring 216. With respect to the rotation of the support arm 209, one end of the support arm 209 is restricted by the swing restriction link 214, so that the lower limit position on the circular saw blade 211 side is determined, and the rotation above a predetermined level is restricted. Then, with the operator holding the handle, the main support link 206 is rotated counterclockwise around the hinge portion 205. As a result, the circular saw blade 211 moves to the left in the drawing, and the work of cutting the work 203 is cut. By the way, since the trapezoidal link also moves during this movement, the hinge portion 208
Moves in an arc shape, but since the end of the support arm 209 is pivotally attached to the swing restriction link 214, which is shorter than the main support link 206, the lower limit position of the circular saw portion is substantially horizontal. Therefore, when the support arm 209 is moved while being pressed, the circular saw portion moves substantially horizontally. Furthermore, the support arm 20 is urged by the urging force of the coil spring 216.
9 rotates counterclockwise around the hinge 208,
In addition, the main support link 206 is rotated clockwise about the hinge portion 205 by the urging force of the coil spring 215,
It will be in the initial state.

[0008]

However, in the above-mentioned Japanese Patent Laid-Open No. 4-366601, the lower limit of the support arm is restricted during the cutting operation, and the circular saw portion is moved horizontally. Since the support arm is constantly pressed downward during the cutting operation, operability is poor. Further, since two coil springs are used and the biasing directions of the coil springs are different from each other, it is difficult for the operator to adjust the degree of force input and the operability is poor.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a circular saw machine capable of improving the operability when the circular saw portion is moved horizontally.

[0010]

According to the present invention, there is provided a base portion, a main support link pivotably attached to the base portion at one end thereof about a first pivot point, and the main support link. A support arm pivotally mounted on a second pivot point formed on the other end side of the support arm, a circular saw blade rotatably provided on the support arm via a rotation shaft, and the base described above. A swing restricting link provided between a third pivot point of the base portion and a fourth pivot point of the support arm, the fourth pivot point being the second pivot point and the rotary shaft. Located on a straight line connecting between and, the distance between the first pivot point and the second pivot point, the distance between the third pivot point and the fourth pivot point, and The distance between the second pivot point and the rotation axis is set to be substantially equal, and the distance between the first pivot point and the third pivot point is set to the second pivot point and the fourth pivot point. With a pivot point The distance is set to approximately 1.8 to 2.2 times the distance between them; the base portion has a disk link that is swingable about the first pivot point, and this disk is The third pivot point is formed on the link, and an elastic member is interposed between the base portion and the main support link, and the elastic member moves the main support link from the cutting operation end position to the initial state position. It is characterized by urging in the returning direction.

[0011]

When performing the cutting process, the work material is placed on the table and the support arm is pulled toward you. Then, the support arm rotates about the second pivot point with respect to the main support link, and the main support link rotates about the first pivot point. In this state, the circular saw blade is rotated. Then, while holding the state where the circular saw blade hits the workpiece, the circular saw blade is slid backward to cut the workpiece. At this time, since the support arm is restricted by the swing restriction link, the rotary shaft holding the circular saw blade moves in a substantially horizontal direction.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of a circular saw machine according to the present invention. Reference numeral 1 in the figure is a base, and a turntable 2 is rotatably provided on the base 1. The fixed handle 3 is provided on the rotary table 2 so that the rotation of the rotary table 2 is fixed by the fixed handle 3. Further, a stool plate 4 is swingably provided on the base 1, and an adjusting foot 5 is provided on the stool pipe 4 so that its height can be adjusted. Further, a pivot 2a of the rotary table 2 is provided on the left side surface of the base 1 in the drawing, and a support member 8 is provided on the pivot 2a via a shaft 7 so as to be rotatable around the shaft 7. . A main support link 10 is attached to the support member 8 via a shaft 9.
And one end of the disk link 11 and the center of the disk link 11 are rotatably provided. A support arm 13 is rotatably provided at the other end of the main support link 10 via a shaft 12. A circular saw blade 15 is attached to an appropriate position of the support arm 13 via a rotary shaft 14. Further, the disk link 11 is provided with a pin 11a protruding therefrom.
One end of a swing restriction link 16 is pivotally attached to the. Further, the other end of the rocking regulation link 16 is pivotally attached to a pin 13 a protruding from the support arm 13. Also, the shaft 9
A coil spring 17 is wound around the main support link 1
0 is urged counterclockwise in the figure. Further, the disc link 11 is formed with a recess 11b.
The protrusion 8 a located in the position b is formed on the support member 8. The disc link 11 is configured so that the rotation of the disc link 11 is restricted by contacting the end of the recess 11b with the protrusion 8a. Further, a contact pin 10a is provided at a proper position on the main support link 10, and the support arm 13 comes into contact with the contact pin 10a, so that the support arm 13
The clockwise rotation of the shaft 12 center in the figure is restricted.
Further, the contact member 10 is provided at a proper position on the main support link 10.
b is also projectingly provided, and the swinging restriction link 16 comes into contact with the contact member 10b, so that the support arm 1
The counterclockwise rotation in the figure around the shaft 12 of No. 3 is restricted.

Here, the distance from the shaft 9 to the shaft 12, the distance from the pin 11a of the disc link 11 to the pin 13a of the support arm 13, and the distance from the shaft 12 to the rotary shaft 14 are set to be equal. In this embodiment, it is set to 230 mm. Further, the pin 13 a of the support arm 13 is positioned in a straight line connecting the shaft 12 and the rotary shaft 14. Further, the distance from the shaft 9 to the pin 11a is set to be twice the distance from the shaft 12 to the pin 13a. In this embodiment, the distance from the shaft 9 to the pin 11a is 60 m.
m, the distance from the shaft 12 to the pin 13a is 30 mm
Is set to.

The operation of the circular saw machine thus configured will be described. First, the rotary table 2 and the surface plate pipe 4
The work piece 18 is positioned and placed on top. Then, the operator grips the grip portion 13b provided on the support arm 13 and moves the support arm 13 to the right in the drawing. At this time, the main support link 10 rotates about the shaft 9 in the clockwise direction in the drawing, and the support arm 13 rotates about the shaft 12 in the counterclockwise direction in the drawing. At this time, the rotation of the support arm 13 around the shaft 12 is prevented from rotating around the shaft 12 because the swinging restriction link 16 contacts the contact member 10b as shown in FIG. It will be in the state of being. Further, the main support link 10 is rotated clockwise about the shaft 9 while the support arm 13 is restricted from rotating counterclockwise in the figure. During this operation, the swing restriction link 1
As 6 also moves, the disc link 11 also rotates, the end of the recess 11b abuts the protrusion 4a, and as shown in FIG. The rotation is restricted, and the lower limit position of the circular saw blade 15 is determined. In addition, a part of the workpiece 18 is cut during this operation. Next, the support arm 13 is moved to the left in FIG. 3 while holding the grip portion 13b of the support arm 13.
That is, the main support link 10 rotates about the shaft 9 in the counterclockwise direction in the drawing, and the support arm 13 also rotates about the shaft 12 in the clockwise direction in the drawing (FIG. 4). At this time, the urging force of the coil spring 17 allows the operator to rotate the main support link 10 without requiring a large force. Further, as shown in FIG. 5, the circular saw blade 15 is moved leftward in the drawing until the support arm 13 contacts the contact pin 10a. Then, the cutting operation is completed at the position where the contact pin 10a and the support arm 13 are in contact with each other. The movement locus of the circular saw blade 15 during the cutting operation can be moved substantially horizontally as shown in FIG. FIG. 6 is an analysis of the movement locus of the rotary shaft 14 holding the circular saw blade 15, and the size thereof is set to 1/2 of the size described above in this embodiment. As can be seen, it is recognized that the rotating shaft 14 does not have a linear horizontal movement in a strict sense, but can have a substantially horizontal movement. After that, the main support link 10 is rotated counterclockwise in the figure by the biasing force of the coil spring 17. Then, the support arm 13 also rotates around the shaft 9, and the position of the pin 13a that supports one end of the swing restriction link 16 also moves. Along with this, the disc link 11 rotates around the shaft 9, and the end of the recess 11b abuts the protrusion 4a and is held in the initial state (FIG. 1).

In this initial state, the main support link 10 is restricted from rotating the shaft 9 in the counterclockwise direction for the following reason. That is, when the main support link 10 tries to rotate counterclockwise, the support arm 13 tries to rotate clockwise around the shaft 12. However, the rotation of the support arm 13 is restricted by the contact pin 10a of the main support link 10. Therefore, the support arm 13 cannot move, and consequently the main support link 10 cannot rotate.

FIG. 7 is a side view showing another embodiment of the circular saw machine according to the present invention. The same members as those in the above-described embodiment are designated by the same reference numerals, and detailed description will be omitted. In particular, this embodiment is another embodiment for restricting the counterclockwise rotation of the support arm 13 around the shaft 12. That is,
A disc link 21 is rotatably provided on the shaft 12, and a link 22 is provided between the disc link 21 and the pin 8a of the support member 8. Further, the disk link 21 is formed with a protrusion 21 a.
An abutting portion 13b capable of abutting on the la 1a is formed on the support arm 13. When the support arm 13 tries to rotate counterclockwise around the shaft 12 in the figure from the state shown in the figure, the abutting portion 13b comes into contact with the projecting portion 21a, but the projecting portion 21a is moved by the link 22. Is regulated, so that it is in the fixed state in the state shown in the figure, and consequently the rotation of the support arm 13 is regulated.

In the above two embodiments,
Although the one in which one end of the rocking restriction link 16 is pivotally attached to the pin 11a of the disk link 11 provided on the shaft 9 has been described, the disk link 11 is not always necessary, and the rocking restriction is not provided. One end of the link 16 may be pivotally attached to the support member 8. In this case, the circular saw blade 15 has only the function of sliding back and forth, but the sliding width can be lengthened and the cutting ability can be improved by a measure such as lengthening the main support link 10.

Further, in the above embodiment, the shaft 9
The distance from the shaft 12 to the pin 11a is set to 60 mm, the distance from the shaft 12 to the pin 13a is set to 30 mm, and the distance from the shaft 9 to the pin 11a is set to the shaft 12 to the pin 1
Although it is set to twice the distance to 3a, it is not always necessary to set the distance to 3a, and in the range of about 1.8 times to about 2.2 times,
At least the effects of the present invention can be obtained. FIG. 8 is a diagram showing a movement locus of the circular saw blade in the case of 1.8 times, and FIG. 9 is a diagram showing a movement locus of the circular saw blade in the case of 2.2 times. From these FIGS. 8 and 9, it can be seen that the movement trajectory of the circular saw blade 15 during the cutting operation can be moved substantially horizontally.

[0019]

As described above, according to the present invention, since the support arm is restricted by the swing restriction link, the circular saw blade can be moved horizontally, so that the operability is improved. Further, since the elastic member biases the main support link in a direction to rotate when the circular saw blade moves horizontally, it is possible to smoothly move the circular saw blade horizontally, resulting in good operability and the like. Play.

[Brief description of drawings]

FIG. 1 is a side view of a circular saw machine according to the present invention.

FIG. 2 is a side view of a main part of a circular saw machine according to the present invention.

FIG. 3 is a side view of a circular saw machine according to the present invention.

FIG. 4 is a side view of the circular saw machine according to the present invention.

FIG. 5 is a side view of the circular saw machine according to the present invention.

FIG. 6 is a diagram showing a movement trajectory of a circular saw blade of the circular saw machine according to the present invention.

FIG. 7 is a side view of another embodiment of the circular saw machine according to the present invention.

FIG. 8 is a diagram showing a movement trajectory of a circular saw blade of the circular saw machine according to the present invention.

FIG. 9 is a diagram showing a movement trajectory of a circular saw blade of the circular saw machine according to the present invention.

FIG. 10 is a side view of a conventional circular saw machine.

FIG. 11 is a side view of a conventional circular saw machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base (base part) 8 ... Support member (base part) 9 ... Shaft (1st pivot point) 10 ... Main support link 11 ... Disc link 11a ... Pin (3rd pivot point) 12 ... Shaft (Second pivot point) 13 ... Support arm 13a ... Pin (fourth pivot point) 14 ... Rotating shaft 15 ... Circular saw blade 16 ... Oscillation regulating link

Claims (2)

[Claims] 1. A base portion, and a main support link pivotally attached to the base portion such that one end thereof is swingable about a first pivot point.
A support arm pivotally mounted about a second pivot point formed on the other end side of the main support link, and a circular saw blade rotatably provided on the support arm via a rotary shaft. And a swing restricting link provided between the third pivot point of the base portion and the fourth pivot point of the support arm, the fourth pivot point being the second pivot point. Is located on a straight line connecting the rotation axis and, and the distance between the first pivot point and the second pivot point, between the third pivot point and the fourth pivot point. The distance and the distance between the second pivot point and the rotation axis are set to be substantially equal to each other, and the distance between the first pivot point and the third pivot point is the second pivot point. A circular saw machine characterized in that it is set to approximately 1.8 times to 2.2 times the distance between the above-mentioned fourth pivot point. 2. The base portion has a disc link swingably provided about the first pivot point, and the third pivot point is formed on the disc link. 2. An elastic member is interposed between the section and the main support link, and the elastic member urges the main support link in a direction to return the main support link from the cutting operation end position to the initial state position.
Circular saw machine described.