JPH027765B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a cutting machine that is safe and relatively easy to configure, by reliably and intermittently interlocking the swing-like vertical movement of a circular saw with a presser cover. Regarding.

[Conventional technology and its problems]

Conventionally, from the safety point of view of cutting machines such as circular saws, after pressing the material with the material holding cover, the circular saw swings appropriately and pops out from the table surface, cuts the material, etc., and then the circular saw The process involves retracting and finally releasing the material holding cover. Therefore, in order to simplify the process, there are some types that can be operated with a single hydraulic or pneumatic cylinder, and others that can be operated with a plurality of cylinders.

However, all of these configurations use cylinders, etc., springs, etc., and although the configuration is relatively simple, it is possible to appropriately adjust the vertical movement of the circular saw, such as the swing, and to achieve better cutting. or,
There were issues such as the lack of safety considerations.

[Means to solve the problem]

Therefore, in order to solve the above problem, the inventor conducted extensive research and developed an invention in which a main shaft is installed horizontally within the machine frame, and one end of a swing pedestal that swings in a vertical plane is attached to the main shaft. , a circular saw driven by a motor is provided at the other end of the swing pedestal, a spur gear is pivotally supported on the main shaft, and a small spur gear driven by a swing motor and attached to the middle of the swing pedestal is meshed with the spur gear; One end of the connecting rod is pivotally supported at a suitable location on the outer circumference of the spur gear, and the other end is connected to the material holding cover so that the material holding cover can be raised and lowered, and the lifting and lowering movement of the material holding cover and the swinging movement of the circular saw are controlled. By making this cutting machine possible intermittently by driving only the swing motor, the swing-like lifting movement of the circular saw and the presser cover are reliably and intermittently linked, making it possible to achieve a safe and secure operation. It has a relatively simple configuration and solves the above problems.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 4.

Reference numeral 1 denotes a machine frame, and 2 a main shaft installed horizontally within the machine frame 1, both ends of which are pivotally supported by bearings 3, 3 provided within the machine frame 1. Reference numeral 4 denotes a swing base, which is shaped like a flat box, is relatively wide, and has sufficient strength to allow a swing motor 10 (to be described later) to be placed thereon, and one end (the left side in FIG. 2) is connected to the main shaft 2. is fixed to. Sometimes it is not fixed like this.

A circular saw 5 driven by a motor 7 is provided at the other end of the swing base 4 (on the right side in FIG. 2). That is, a circular saw 5 is fixed to the end of a shaft rod 6 rotatably provided on the other side of the swing base 4. The circular saw 5 is driven by an electric motor 7 provided at the other end of the swing base 4 (on the right side in FIG. 2). The pulley 7a of the motor 7 and the circular saw 5
A belt 8 is wound around the pulley 7a at the end of the shaft rod 6 to which it is fixed.

Reference numeral 9 denotes a spur gear, which has a relatively large pitch circle formed by a predetermined module, and which is connected to the main shaft 2.
It is rotatably supported on the shaft. The spur gear 9 is
As shown in FIG. 1, the gear cutting portion has a semicircular shape, but the gear cutting portion is not limited to this, and the gear cutting portion may also have a circular shape.

Reference numeral 10 denotes an electric swing motor, which is fixed to the middle upper surface of the swing base 4. A small spur gear 11, which is the same module as the spur gear 9 and has a relatively small pitch circle, is fixed to the drive shaft end of a reduction gear 10a directly connected to the swing motor 10. The small spur gear 11 is meshed with the spur gear 9. In the embodiment, the reduction gear 10a is provided, but if the structure has a built-in reduction gear, the small spur gear 11 may be fixed to the drive shaft of the swing motor 10, so the structure is not limited to the embodiment.

As described above, one end of the swing base 4 (the left side in FIG. 2) is attached to the main shaft 2, and the other end (the right side in FIG. 2) is equipped with the motor 7, the circular saw 5 driven by the motor 7, and the swing base 4. motor 1
A relatively large weight element such as 0 is added, and due to their own weight, a moment is applied to rotate the shaft clockwise in FIG. 2.

The attachment of the main shaft 2 is fixed or
It is rotatably provided.

Reference numeral 12 denotes a connecting rod, whose lower end side (left side in FIG. 2) is pivotally supported at a suitable position on the circumferential surface of the spur gear 9 via a pin 13, and is provided so as to be movable up and down on a vertical plane.

The upper end side (right side in FIG. 2) of the connecting rod 12 is pivotally supported via a pin 15 at the end (lower end) of a link 14 that raises and lowers a material holding cover 18, which will be described later.

The base of the link 14 is fixed to one end of a shaft rod 16 horizontally disposed on the upper side of the machine frame 1. One end of one of the parallel links 17a and 17b is fixed to the other end of the shaft rod 16, and the parallel link 17
The other end sides of a and 17b are pivotally supported by the material holding cover 18.

In the embodiment, the material holding cover 18 is raised and lowered by
Due to the rotation of the spur gear 9, the connecting rod 12 and the link 1
4. It operates via the shaft rod 16 and parallel links 17a and 17b, respectively.

Although not shown, the connecting rod 12 is made to move up and down within the guide, and the other end (upper end) of the connecting rod 12 is directly fixed to the material holding cover 18, so that the connecting rod 12 moves up and down directly. In some cases, the material holding cover 18 is configured to be movable up and down. In any case, the present invention is not limited to the embodiment as long as the material pressing cover 18 is also configured to be able to rise and fall as the connecting rod 12 moves up and down.

The material holding cover 18 has a substantially elongated gate-shaped cross section and covers the circular saw 5 when the circular saw 5 protrudes above the table 1a surface of the machine frame 1.

As described above, the structure is such that the vertical movement of the material holding cover 18 and the swing movement of the circular saw 5 can be performed intermittently by driving only the swing motor 10.

2a in the figure is a swing angle adjustment rod, which is the main shaft 2.
The angle (rotation) is adjustable and it is relatively rigidly supported. Although this angle adjustment is not shown, the structure is such that it can be easily adjusted from the outside of the machine frame 1 using a suitable pedestal or the like. Reference numeral 19 denotes a limit switch for adjusting the swing angle, which operates in contact with the end of the swing angle adjusting rod 2a. A stopper lever 4a is fixed to the end of the swing base 4 and stops the clockwise rotation of the swing base 4 by coming into contact with the corresponding inner wall of the machine frame 1. Reference numeral 20 denotes a limit switch for stopping the swing motor 10, which is activated when the material holding cover 18 rises by a certain amount after this rotation has stopped, and is activated when the link 14 is rotated clockwise.

What is shown in FIGS. 3 and 4 is a mechanism for adjusting the raised position of the material holding cover 18, in which a cam 21 is fixed to the middle of the shaft rod 16. This cam 21 has a part of its circumference formed as an enlarged circumferential part 21a larger than the other outer circumference. Reference numeral 22 denotes an adjusting rod, which is relatively rigidly and rotatably installed on the bracket so that its lower end is coaxial with the shaft rod 16. The swing motor 10 is mounted in the middle of the adjusting rod 22. Limit switch 2 for stopping
0 is provided, and this contact is activated by contacting the enlarged peripheral portion 21a of the cam 21. 22
A is a pedestal provided on the upper part of the adjustment rod 22.

[Effect]

First, turn on the rotary switch of circular saw 5,
The circular saw 5 rotates in the direction of the arrow (clockwise in FIG. 2). Then turn on the disconnect switch,
Then, the small spur gear 11 on the output shaft of the speed reducer 10a of the swing motor 10 rotates counterclockwise in FIG. At this time, swing pedestal 4
On the other end side (the right side in Figure 2), relatively heavy elements such as the motor 7, circular saw 5, swing motor 10, etc. are added, and a large Since the moment is applied, the swing base 4 is heavy and in a fixed state (see the solid line position in FIG. 2).

Further, when the small spur gear 11 rotates counterclockwise in FIG. 2, the spur gear 9 meshed with the small spur gear 11 rotates clockwise around the main shaft 2 (see FIG. 2).
Rotate to. This acts to raise the connecting rod 12 that is pivotally supported on the spur gear 9, and rotates the link 14 that is pivotally supported above the connecting rod 12 in a counterclockwise direction. 17a,
17b is rotated counterclockwise around the shaft rod 16 to lower the material holding cover 18 on the tip side of the parallel links 17a, 17b, and further lower this to remove the cover of wood etc. on the surface of the table 1a. Press and fix the cutting material a. At the same time as this material to be cut a is fixed, the parallel links 17a, 17b, link 14, connecting rod 12, and spur gear 9 are all fixed. The above is the pressing movement of the material pressing cover 18.

This time, the small spur gear 11 revolves to the left in FIG. 2 while rotating on the spur gear 9 with which it is meshed. That is, the small spur gear 11 serves as a planet in a planetary gear mechanism, and the small spur gear 11 rotates on its own axis on the sun gear of the main shaft 2 while revolving around the sun gear, and the reduction gear is linked to the small spur gear 11. 1
0a, the swing base 4 to which the swing motor 10 is fixed rotates counterclockwise in FIG. That is, the rotating circular saw 5 rises while swinging, starts cutting the material a, and completes the cutting.

The above is the swing motion of the circular saw 5.

In this way, only by the rotation of the small spur gear 11,
The pressing motion of the material pressing cover 18 and the swinging motion of the circular saw 5 are performed intermittently.

When the swing base 4 rotates counterclockwise so that the circular saw 5 completes cutting (see the chain line position in Figure 2), the swing angle adjustment rod 2a operates the limit switch 19, thereby closing the electric circuit. This time, the small spur gear 11 is reversed (rotated clockwise), and the small spur gear 11 is rotated clockwise in FIG. 2 on the fixed spur gear 9, that is, it is rotating. The circular saw 5 descends while swinging and returns to its original position (the solid line position in Figure 2), and at this time, the bolt protruding from the end of the stopper lever 4a fixed to one side of the swing base 4 hits the inner wall of the machine frame 1. Upon contact, the swing base 4 stops descending (clockwise rotation). Then, the center position of the small spur gear 11 provided on the heavy swing base 4 becomes fixed, and further clockwise rotation of the small spur gear 11 causes the spur gear 9 to rotate counterclockwise.
Along with this, the connecting rod 12 is pulled downward,
The link 14 and the parallel links 17a and 17b are rotated clockwise around the shaft rod 16, the material holding cover 18 is raised, and the material holding cover 18 is moved away from the material a to be cut, which is pressed and fixed by the material holding cover 18, and then When raised, the link 14 operates the limit switch 20, thereby turning off the cutting switch and completing the cutting operation.

Also, to describe the operation of the mechanism for adjusting the raised position of the material holding cover 18 shown in FIGS. 3 and 4, first, when the cutting height of the material a to be cut is relatively low, 4. Set the pedestal 22a at the position shown by the solid line in FIG. Then, after cutting the material a to be cut, the swing base 4 is lowered, and then the connecting rod 12 is lowered, and when the link 14 reaches the position indicated by the solid line in FIG. 4,
The contact point of the limit switch 20 comes into contact with the enlarged peripheral portion 21a, turning off the cut switch and stopping the material holding cover 18 from rising. In this case, the rise is relatively small. Further, when the height of the cross section of the material to be cut a is relatively high, the pedestal 22a is set at the position indicated by the two-dot chain line in FIG. Then, after cutting the material a, the link 14 shown in FIG.
When the limit switch 20 is rotated further clockwise from the position shown by the solid line in FIG. 4 to the position shown by the two-dot chain line in FIG.
a, the cutting switch is turned OFF, and the material holding cover 18 stops rising. In this case, the increase can be quite large.

〔Effect of the invention〕

In the present invention, a main shaft 2 is installed horizontally within a machine frame 1, one end of a swing pedestal 4 that swings in a vertical plane is attached to the main shaft 2, and a circular drive motor 7 driven by a motor 7 is attached to the other end of the swing pedestal 4. A saw 5 is provided, and the main shaft 2
A spur gear 9 is pivotally supported, a small spur gear 11 driven by a swing motor 10 attached to the middle of the swing base 4 is meshed with the spur gear 9, and one end of a connecting rod 12 is attached to an appropriate position on the outer periphery of the spur gear 9. The material holding cover 18 is pivotably supported and the other end is connected to the material holding cover 18 so that the material holding cover 18 can be raised and lowered, and the lifting movement of the material holding cover 18 and the swing movement of the circular saw 5 are controlled by the swing motor 10. By using a cutting machine that can be driven intermittently by a chisel, the first
Second, with only one swing motor 10, it is possible to swing (raise and lower) the circular saw 5 and press and fix the material to be cut a intermittently, and secondly, safe work is possible, and thirdly, compared to Since it is a simple planetary gear mechanism, it can be manufactured at a relatively low cost.

To explain these effects in detail, first, the main shaft 2 to which the heavy swing pedestal 4 is attached is in a fixed state, and the small spur gear 1 of the swing motor 10
In one rotation, the spur gear 9 is rotated, thereby lowering the material pressing cover 18 via the connecting rod 12, and pressing and fixing the material a to be cut, such as wood, on the surface of the table 1a. At the same time as this material to be cut a is fixed, the position of the spur gear 9 becomes fixed, and this time, the spur gear 9 with which the small spur gear 11 is meshed
The swing pedestal 4 rotates on its own axis and revolves in the counterclockwise direction in FIG. , which completes the cutting.

After cutting, the process is the opposite of the above, that is, after the swing base 4 is lowered, the material holding cover 18 is raised and separated from the material a to be cut.

In the present invention, in particular, one swing motor 1
0 alone, the swing-like lifting action of the circular saw 5 and the pressing and fixing of the material to be cut a can be performed intermittently, and not only is the configuration simple, but this process always requires
After pressing and fixing the material a to be cut, the circular saw 5 is then raised (cut) to provide reliable operation. In other words, there is an advantage in that there is no waste in movement.

In particular, the material to be cut a is first pressed and fixed, and after this is completed, the circular saw 5 starts cutting, and the circular saw 5 does not cut until it is firmly fixed. It is safe and effective.

Further, as described above, the spur gear 9 pivotally supported on the main shaft 2 functions as a sun gear, and the swing motor 1
The small spur gear 11 driven by 0 drive becomes a planet to constitute a planetary gear mechanism, and the circular saw 5 is configured to perform a swing-like lifting action around the main shaft 2, so that the planetary gear mechanism is the smallest component. This is a gear mechanism, and by adopting this mechanism, a series of cutting processes can be performed using a single drive source, and the overall advantage is that it can be provided at a low price. Furthermore, according to the planetary gear mechanism of the present invention, the swing-like raising and lowering action of the circular saw 5 and the process of pressing and fixing the material to be cut a are all performed by the gear train with extremely reliable movement, and are relatively small. There are also effects that can be configured in space.

In particular, the present invention can be configured with only an electric mechanism,
Unlike hydraulic cylinders and air cylinders, there is no need for other hydraulic mechanisms or compressors, and the overall structure can be made compact, which also has the advantage of being easy to use even in small factories.

In addition, as shown in FIGS. 3 and 4, the shaft rod 16
If a cam 21 is provided in the middle, and an adjusting rod 22 with a limit switch 20 is provided so as to be able to swing, the raised position of the material holding cover 18 can be adjusted as appropriate, thereby allowing the material to be cut to have an appropriate diameter, etc. There are advantages such as cutting can be performed by raising and lowering the material holding cover 18 according to the material a, shortening the cutting process time and reducing power consumption. In this respect, hydraulic cylinders and air cylinders have fixed strokes, which is a great improvement over the inconvenience of not being able to easily adjust the swing angle.

[Brief explanation of drawings]

The drawings show one embodiment of the invention,
Fig. 1 is a perspective view of the main parts of the entire invention, Fig. 2 is a side view of the invention, Fig. 3 is a schematic perspective view of a lifting adjustment device for the material holding cover, and Fig. 4 is a side view of Fig. 3. It is a diagram. 1... Machine frame, 2... Main shaft, 4... Swing pedestal, 5... Circular saw, 7... Motor, 9... Spur gear,
10... Swing motor, 11... Small spur gear,
12... Connecting rod, 18... Material holding cover.

Claims (1)

[Claims] 1 A main shaft is installed horizontally within the machine frame, one end of a swing pedestal that swings in a vertical plane is attached to the main shaft, a circular saw driven by a motor is provided at the other end of the swing pedestal, and a spur gear is attached to the main shaft. A small spur gear driven by a swing motor attached to the middle of the swing base is engaged with the spur gear, one end of a connecting rod is pivotally supported at a suitable position on the outer circumference of the spur gear, and the other end is used to hold down the material. The material holding cover is connected to the cover so that it can be raised and lowered, and the raising and lowering movement of the material holding cover and the swinging movement of the circular saw are made possible intermittently by driving only the swing motor. cutting machine.