JP2728253B2 - Sawing machine - Google Patents

Description

The present invention relates to a sawing machine, and more particularly, to a sawing machine provided with a saw blade changing device.

(Prior Art) Conventionally, in a sawing machine such as a band sawing machine, a band saw blade for cutting a work is mounted on a saw blade housing. That is, the band saw blade is wound around the drive wheel and the driven wheel provided on the saw blade housing.

The means for winding the band saw blade around the driving wheel and the driven wheel has been manually performed by an operator.

(Problems to be Solved by the Invention) By the way, since the means for mounting the band saw blade on the conventional saw blade housing is manually performed by an operator, the mounting operation is very troublesome and requires time and effort. In addition, there is a problem that it takes a long time to replace the band saw blade.

On the other hand, the idea of automatically replacing a saw blade having an unstable shape such as a band saw blade has been conceived until now, but the specific configuration has been difficult and it has not been possible to overcome common sense.

[Constitution of the Invention] (Means for Solving the Problems) In view of the above-described conventional problems, the present invention provides a saw blade housing having a rotatable drive wheel and a driven wheel around which a band saw blade is wound. The mounted cassette case is provided so as to be movable in the front-rear direction parallel to the axis of the two wheels, and a plurality of cassette holders housed in the cassette case in parallel with the moving direction of the cassette case are provided with the two wheels. A saw blade cassette having a band saw blade to be wound inside is detachably provided, and each cassette holder is separately movably provided from the cassette case at a position facing the both wheels, and the saw held by the moved cassette holder is provided. The band saw blade housed in the blade cassette can be wound around the wheels by retreating the cassette case.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1 and 2, a fixed vise 5F and a movable vise 5M for gripping a work W are provided on a base 3 of a band saw machine 1 as a saw machine. Base 3
Is provided with a saw blade housing 7 which can move up and down.
A rotatable drive wheel 9 and a driven wheel 11 for holding the band saw blade T are mounted on the saw blade housing 7.

A drive motor (not shown) is connected to the drive wheel 9, and the drive wheel 9 is rotated by driving the drive motor. Drive wheel 9 and driven wheel 11
At this time, the band saw blade T is wound, and the band saw blade T is given a desired rotation speed. The workpiece W is cut by the rotated band saw blade T.

On the right side of the saw blade housing 7 in FIG.
A control device 13 including a CRT 13A, an input key 13B, and the like is provided.

A plurality of saw blade cassettes are provided above the saw blade housing 7.
A cassette case 17 accommodating 15 is provided. Third
As shown in the figure, a door 21 which is rotatable around a hinge 19 is attached to the right end of the cassette holder 25. After the door 21 is opened and a plurality of saw blade cassettes 15 are inserted, the saw blade cassette 15 is fixed to the cassette holder 25 by closing the door 21.

In accordance with the display instruction displayed on the CRT 13A, the saw type, the pitch, the steel type and the diameter of the work W to be cut and the like of the band saw blade T of the saw blade cassette 15 housed in the cassette case 17 are input with the input keys 13B. Moreover, the band saw blade T of the saw blade cassette 15 housed in the cassette case 17 is selected so as to be most suitable for the work W.

As shown in FIGS. 3 and 4, the cassette case 17 is composed of a frame 23 having an open lower portion.
A plurality of cassette holders 25 are provided on the frame 23 at appropriate intervals so as to be movable in a direction perpendicular to the plane of FIG. In each cassette holder 25, a concave portion 25A having an open lower portion is formed, and a T groove 25B is formed in an upper portion of the concave portion 25A in a direction perpendicular to the paper surface in FIG. 5 as shown in FIG. Is formed to.

On the other hand, as shown in FIG. 5, a T-shaped protrusion 15A is formed integrally with the upper portion of the saw blade cassette 15, and the T-shaped protrusion 15A
And the saw blade cassette 15 is held by the cassette holder 25.

Each cassette holder 25 is moved up and down with respect to the cassette case 17. More specifically, as shown in FIG. 6, the left end of the cassette holder 25 is vertically racked.
A pinion 27 meshed with the rack 25C is provided so as to protrude from a hole 29 formed in the cassette case 17 to the inside. A shaft 31 is mounted on the pinion 27, and a drive motor such as a servo motor (not shown) is connected to the shaft 31.

7 (A) and 7 (B) show a limit switch 33 for stopping the upper limit in the upper portion of the left side wall of the cassette case 17 and a limit switch 35 for stopping the lower limit in the lower portion of the left side wall. It is installed like that.

With the above configuration, when a drive motor (not shown) is driven, the pinion 27 is rotated in a fixed direction via the shaft 31. Since the rack 25C is raised by the rotation of the pinion 27, the upper left end of the cassette holder 25 comes into contact with the limit switch 33 and is stopped as shown in FIG. The settings are made.

When the pinion 27 is rotated in the reverse direction, the rack 25C descends, so that the lower left end of the cassette holder 25 comes into contact with the limit switch 35 and is stopped as shown in FIG. 7 (B). The lower limit of the cassette holder 25 is set.

The cassette case 17 is movable back and forth with respect to the saw blade housing 7. More specifically, as shown in FIGS. 8 and 9, a bracket 37 is attached to the lower part of the side of the saw blade housing 7 in FIG. On the left side,
A drive motor 39 such as a servo motor having a rotary encoder is fixed.

A ball screw 41 extending in the left-right direction in FIG. 8 in the front-rear direction is rotatably mounted on the drive motor 39. A cassette case supporting portion 43 is screwed to the ball screw 41. The cassette case support 43 is integrated with the rear part of the cassette case 17.

With the above configuration, when the drive motor 39 is driven, the ball screw 41 is rotated. Since the cassette case supporting portion 43 is screwed into the ball screw 41, the cassette case 17 is moved forward or backward through the cassette supporting portion 43.

The detailed structure of the saw blade cassette 15 is shown in FIGS.
As shown in the figure, the front housing 45 and the rear housing 47 are composed of a front housing 45 and a rear housing 47.
47 is detachably attached by, for example, a fitting method. Moreover, the front housing 45 and the rear housing 47
Are formed at substantially the center in concave portions 45A and 47A having substantially the same shape.

The front housing 45 also serves as a cover for preventing the band saw blade T from jumping out when the band saw blade T breaks, and the surface of the front housing 45 displays, for example, the company name and the type of the band saw blade T. Is easy to manage.

A drive wheel hole 49 into which the drive wheel 9 and the driven wheel 11 are inserted and a driven wheel hole
51 are formed. The diameters of the drive wheel hole 49 and the driven wheel hole 51 are the drive wheel 9 and the driven wheel hole 51, respectively.
The diameter of the band saw blade T is slightly larger than that of the band saw blade 11 so that the band saw blade T can be easily wound around the driving wheel 9 and the driven wheel 11.

On the inner surface of the rear housing 47 on the drive wheel hole 49 side, for example, a flat plate-shaped fixed saw blade holding plate 53 is attached, and on the inner surface of the back housing 49 on the driven wheel hole 51 side, for example, inflection A movable saw blade holding plate 55 having a shape is mounted via a plurality of springs 57. In the lower corner of the back housing 47 on the side of the drive wheel hole 49, a plurality of discharge holes 59 for discharging the cutting oil accumulated in the housing are formed.

With the above configuration, when holding the band saw blade T on the back housing 47, the operator holds the band saw blade T in his hand and pushes the movable saw blade holding plate 55 against the urging force of the spring 57 to perform the band saw. When the blade T is inserted into the back housing 57 and the movable saw blade holding plate 55 is returned, the band saw blade T comes into close contact with the inside of the long side of the back housing 47 and further moves with the fixed saw blade holding plate 53. It is held between the pressing plate 55 of the type.

When a desired saw blade cassette 15 is selected from the plurality of saw blade cassettes 15 housed in the cassette case 17, the cassette case 17 is moved in the front-rear direction by the drive motor 39 shown in FIGS. The selected saw blade cassette
15 is the driving wheel 9 and the driven wheel 11 of the saw blade housing 7
Is positioned in front of and stopped. And the sixth
The cassette holder 25 is lowered via the rack 25C by rotating the pinion 27 as described with reference to FIGS. 7, 7A and 7B.

As a result, the drive wheel hole 49 and the driven wheel hole 51 of the selected saw blade cassette 15 are fitted and positioned in the drive wheel 9 and the driven wheel 11 as shown by a two-dot chain line in FIG. Next, when the cassette case 17 is slightly retracted in FIG. 8, the cutting edge of the band saw blade T separates from the selected saw blade cassette 15 and is mounted on the saw blade housing 7.

Although the state in which the saw blade cassette 15 is mounted on the cassette holder 25 is not shown, for example, the cassette holder 25
The pins are inserted into the holes and the saw blade cassette 15 is mounted on the cassette holder 25 by attaching pins to the left and right upper portions of the blade and forming holes into the saw blade cassette 15 to fit the pins.

The selected saw blade cassette 15 is mounted on the saw blade housing 7, and this state is shown in FIG. 12 and FIG.
That is, as shown in FIGS. 12 and 13,
The horizontal width of the band saw blade T is larger than the horizontal width of the driving wheel 9 and the driven wheel 11 by the fixed saw blade holding plate 53 and the movable saw blade holding plate 55, and is larger than the horizontal width of the brim of each wheel. The band saw blade T is set to be small and fixed so that the band saw blade T does not hit each wheel and the back of the band saw blade T hits the back of each wheel.

As shown in FIG. 14 (A), the band saw blade T is horizontally inserted deep into the fixed saw blade holding guide 61 disposed at the both ends of the recess of the saw blade housing 7.

Next, in the state shown in FIG. 12, when tension is applied to the driven wheel 11 by a known tension device (not shown) attached to the saw blade housing 7, the state shown in FIGS. 15 and 16 is obtained. And the driven wheel
11 moves to the left. As a result, the band saw blade T moves away from the fixed saw blade holding plate 53, and the movable saw blade holding plate 55 is pushed to the left by the driven wheel 11 while contacting the band saw blade T. Further, the band saw blade T moves away from the inside of the saw blade cassette 15. Thus, the band saw blade T is wound around the driving wheel 9 and the driven wheel 11.

Next, as shown in FIGS. 14A and 14B, a movable saw blade holding guide 63 is rotatably supported on the saw blade holding guide 61 by a pin 65. A fluid cylinder 67 is attached to the fixed saw blade holding guide 61, and the tip of a piston rod 69 mounted on the fluid cylinder 67 is a movable saw blade holding guide.
Installed on 63 with pins 71. Note that holding portions 61A and 63A are attached to the distal ends of the fixed saw blade holding guide 61 and the movable saw blade holding guide 63, respectively.

With the above configuration, as shown in FIGS. 15 and 16, when the band saw blade T is wound around the driving wheel 9 and the driven wheel 11, the fluid cylinder 67 shown in FIG. Then, as shown in FIG. 14 (B), the movable saw blade holding guide 63 rotates counterclockwise around the pin 65 as the piston rod 69 extends, and the band saw blade T becomes 90 degrees, for example. Twisted. Thus, the twisted band saw blade T is held by the holding portion of the fixed saw blade holding guide 61.
It is held by 61A and the holding portion 63A of the movable saw blade holding guide 63.

As described with reference to FIGS. 15 and 16, the band saw blade T is wound around the drive wheel 9 and the driven wheel 11, and
As described in FIGS. 14A and 14B, the band saw blade T
Is twisted, for example, 90 degrees. Next, when the cassette case 17 is slightly advanced in FIG.
Is separated from the selected saw blade cassette 15. Thus, the band saw blade T wound around the driving wheel 9 and the driven wheel 11 is rotated in a certain direction by rotating the driving wheel 9 to cut the workpiece W. By lowering, the work W is cut.

The band saw blade T is detached from the driving wheel 9 and the driven wheel 11 of the saw blade housing 7 and is held by the saw blade cassette 15, and the saw blade cassette 15 holding the band saw blade T is a cassette case.
Since the operation to be accommodated in 17 is performed by performing the reverse operation of the operation described so far, detailed description will be omitted.

Thus, a plurality of saw blade cassettes 15 are housed in the cassette case 17 provided above the saw blade housing 7,
Since the band saw blade T is held in each saw blade cassette 15,
A desired saw blade cassette 15 is selected from the saw blade cassettes 15 stored in the cassette case 17. The selected saw blade cassette 15 is mounted on the saw blade housing 7 and the band saw blade T held by the saw blade cassette 15 is automatically mounted on the drive wheel 9 and the driven wheel 11 of the saw blade housing 7 and wound. Is done. Therefore, since the band saw blade T can be automatically mounted or removed between the cassette case 17 and the saw blade housing 7, the replacement of the used band saw blade T for the next processing and the used band saw blade T is automatically, easily and quickly. It can be carried out.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.

[Effects of the Invention] As can be understood from the above description of the embodiment, in short, the present invention rotatably comprises a drive wheel (9) wound with a band saw blade (T) and a driven wheel (11). The cassette case (17) attached to the saw blade housing (7)
A plurality of cassette holders (provided in the cassette case (17)) which are provided so as to be movable in the front-rear direction parallel to the axes of the wheels (9, 11) and are arranged in parallel with the movement direction of the cassette case (17). 25), a detachable saw blade cassette (15) having a band saw blade (T) wound around the wheels (9, 11) is detachably provided, and the cassette is moved to a position facing the wheels (9, 11). From the cassette case (17) to each cassette holder (2
5) are individually movably provided, and the band saw blade (T) contained in the saw blade cassette (15) held by the moved cassette holder (25) is moved backward by the cassette case (17). It is configured so that it can be wound around the wheels (9, 11).

As is apparent from the above configuration, in the present invention, the cassette case 17 is provided in the saw blade housing 7 so as to be movable in the front-rear direction, and the plurality of cassette holders 25 housed in the cassette case 17 are provided with the band saw blade T. An internal saw blade cassette 15 is provided detachably. Then, each cassette holder 25 can be individually moved from the cassette case 17 to a position facing the drive and driven wheels 9 and 11 provided in the saw blade housing 7, and the cassette held by the moved cassette holder 25. The band saw blade T housed in 15 is configured to be wound around the wheels 9 and 11 by retracting the cassette case 17.

Therefore, according to the present invention, the overall configuration can be made compact and the band saw blade T can be easily attached to and detached from both the driven and driven wheels 9 and 11. Attachment of the band saw blade T to the wheels 9 and 11 is performed by removing a desired cassette holder 25 from the cassette case 17 to the wheels 9 and 11.
The cassette case 17 is moved back to a position opposite to that of the cassette case 17, and a driving device for moving the cassette case 17 back and forth is used for attaching and detaching the band saw blade T to and from the wheels 9, 11. This is an aspect that also serves as a driving device, and can simplify the overall configuration.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a sawing machine according to an embodiment of the present invention. FIG. 2 is a view taken in the direction of the arrow II in FIG. FIG. 3 is a schematic front view of a cassette case which is a main part of the present invention. FIG. 4 is a sectional view taken along the line IV-VI in FIG. FIG. 5 is a sectional view taken along the line VV in FIG. FIG. 6 is an explanatory view showing a part of the left side of the cassette case and moving the cassette holder up and down. FIGS. 7A and 7B are views showing the operation of moving the cassette case up and down with respect to the cassette case. FIG. 8 is a schematic side view of moving the cassette case back and forth with respect to the saw blade housing, and FIG. 9 is a schematic plan view in FIG. FIG. 10 is a schematic front view of the saw blade cassette, and FIG. 11 is a schematic rear view of FIG. FIG. 12 is a schematic front view showing a state in which the saw blade cassette is mounted on the saw blade housing, and FIG. 13 is a sectional view taken along line XIII-XIII in FIG. FIGS. 14 (A) and (B) are explanatory views of a state where the band saw blade is held by the saw blade holding guide. FIG. 15 is an explanatory view of a state in which the band saw blade is removed from the saw blade cassette in the state of FIG. 12 and is wound around a drive wheel and a driven wheel. FIG. 16 is a schematic plan view of FIG. DESCRIPTION OF SYMBOLS 1 ... Band sawing machine, 7 ... Saw blade housing 15 ... Saw blade cassette, 17 ... Cassette case 39 ... Drive motor, 49 ... Drive wheel hole 51 ... Driven wheel hole 53 ... Fixed type saw blade holding plate 55 ... Mobile saw Blade holding plate T: Band saw blade

Claims (1)

(57) [Claims] 1. A cassette case (17) mounted on a saw blade housing (7) rotatably provided with a drive wheel (9) wound around a band saw blade (T) and a driven wheel (11).
A plurality of cassette holders (provided in the cassette case (17)) which are provided so as to be movable in the front-rear direction parallel to the axes of the wheels (9, 11) and are arranged in parallel with the movement direction of the cassette case (17). 25), a detachable saw blade cassette (15) having a band saw blade (T) wound around the wheels (9, 11) is detachably provided, and the cassette is moved to a position facing the wheels (9, 11). From the cassette case (17) to each cassette holder (2
5) are individually movably provided, and the band saw blade (T) contained in the saw blade cassette (15) held by the moved cassette holder (25) is moved backward by the cassette case (17). A sawing machine characterized in that it can be wound around wheels (9, 11).