JP2916399B2 - Traveling circular saw machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling circular saw machine.

[0002]

2. Description of the Related Art A traveling circular saw machine includes a working table for supporting a work, a work fixing mechanism for fixing the work supported on the working table, and a cutting mechanism for moving the circular saw while rotating the saw. When the work fixing mechanism fixes the edge of the work and moves the work to a predetermined cutting position along the processing table, the circular saw cuts the work while the cutting mechanism moves. After the cutting, the work fixing mechanism releases the work, leaves the work on the processing table, and returns to the standby position.

[0003] The work fixing mechanism in such a traveling circular sawing machine includes a pressing member that is driven up and down above a processing table, and a supporting member that is accommodated in a groove formed in the processing table, and is supported by pressing of the pressing member. The work is sandwiched and fixed between the members. The support member is set at the same height as the processing table or slightly higher than the processing table. If the support member is lower than the processing table, the work is not sandwiched between the holding member and the support member, and the work cannot be reliably fixed.

[0004]

However, when the supporting member is at the same height as the working table, when the work is fixed, the fixed portion comes into contact with the working table while being pressed. Therefore, when moving to the cutting position, the work may be rubbed by the processing table and may be damaged.
Further, when the support member is higher than the processing table, when the work fixing mechanism releases the work and returns to the standby position, the work may be dragged while riding on the support member.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and aims to prevent a work from being pressed against a processing table when the work is fixed, and to reliably release the work when the work is released. It is the purpose.

[0006]

According to a first aspect of the present invention, there is provided a working table for supporting a work, a work fixing mechanism for fixing the work supported on the working table, and a cutting mechanism for moving the circular saw while rotating the saw. Wherein the work fixed by the work fixing mechanism is cut by the cutting mechanism, wherein the work fixing mechanism has a pressing member capable of pressing the work toward the processing table, a position at which the work is projected onto the work support surface of the processing table, and A support member provided so as to be displaceable between a position sunk from the support surface and a work member fixed between the support member and the support member protruding onto the work support surface when the work is fixed. It is characterized in that when holding and releasing the work, the pressing of the pressing member is released and the support member is lowered from the work support surface.

According to a second aspect of the present invention, in the first aspect of the present invention, the supporting member is disposed in a posture substantially along the processing table and is pivotally supported so as to be tiltable, and one end of the supporting member is provided. It is connected to an air cylinder that is provided closer to the holding member than the processing table, and the other end of the support member is displaced in the projecting direction and the sinking direction with respect to the work supporting surface by the operation of this air cylinder. Has features.

[0008]

According to the first aspect of the present invention, the work is separated from the processing table when the work is held between the holding member and the support member, so that the work is fixed on the processing table. When the workpiece is moved, the workpiece is prevented from being strongly rubbed against the processing table and damaged. Also, since the support member sinks from the work support surface when the work is released, the work comes into contact with the work support surface,
The support member is detached from the work. Therefore, when the work fixing mechanism moves after the work releasing operation, the work is prevented from being dragged while riding on the support member.

According to the second aspect of the present invention, since the support member is disposed in a posture along the processing table, the support member can be displaced without interfering with the work. Since the support member is not cantilevered but is supported by the shaft so as to be tiltable, the posture of the support member is stabilized. Further, since the air cylinder is disposed closer to the pressing member than the processing table, the air cylinder is smaller than a case where the air cylinder is provided on the opposite side to the pressing member with the processing table therebetween.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a woodworking running saw will be described below with reference to FIGS. The processing table 10 has a rectangular shape that is long in the left-right direction and is fixed substantially horizontally to the main frame 11. The horizontal upper surface of the processing table 10 has a work supporting surface 1 on which a work (a plate material to be cut) W is placed.
It is 4. A chucking unit 20 for fixing the work W is provided behind the processing table 10 (upward in FIG. 2 and rightward in FIG. 3), and the work W fixed by the chucking unit 20 is provided in the front. A cutting unit (cutting mechanism, which is a component of the present invention) 30 for cutting is provided.

The cutting unit 30 is provided to be reciprocally movable left and right by a reciprocating drive mechanism 40. The details of the cutting unit 30 and the reciprocating drive mechanism 40 are shown in FIG. Two guide rails 41 are provided on the left and right of the main frame 11, and the movable frame 31 is fixed to a slider 42 that is engaged with the guide rails 41 and guided left and right. A housing 32 having upper and lower surfaces opened is fixed to the movable frame 31. A circular saw 33 for cutting and a circular saw 34 for cutting are rotatably supported in the housing 32.
Are rotationally driven by dedicated motors 35 (only one is shown in FIG. 3). The two circular saws 33 and 34 and the two motors 35 are lifted and lowered by a lifting mechanism (not shown).
The two circular saws 33 and 34 project from the work W to cut the work W. When the work W is lowered, it sinks down from the slit 13 so as not to contact the work W.

A single drive chain 44 is mounted on the movable frame 31 between two L-shaped end plates 43. The drive chain 44 is hung around a drive sprocket 45 and an idle sprocket 46 rotatably provided at both ends of the main frame 11. When the drive sprocket 45 is rotationally driven by the traveling motor 47 via the chain 48, The drive chain 44 is driven to travel, and the cutting unit 30 travels in the left-right direction while being guided by the guide rail 41. Slit 1
When the cutting unit 30 travels in the left-right direction with both circular saws 33, 34 protruding toward the processing table 10 through 3, the work W is cut in the left-right direction by both circular saws 33, 34.

In the left and right moving regions of the cutting unit 30, a dust collecting duct 53 having an upper surface opened is arranged, and a lower opening of the housing 32 faces the upper surface opening. Chips generated by the dust collecting duct 53 from inside the housing 32 of the cutting unit 30.
It is designed to be sucked into. A pair of guide rolls 55 are arranged on both left and right sides of the dust collection duct 53, and a cover belt 54 is interposed between the guide rolls 55.
A portion of the upper surface opening of the dust collection duct 53 other than the portion connected to the lower opening of the housing 32 is covered with a cover belt 54 to prevent a reduction in dust collection efficiency. Although not shown, an opening corresponding to the lower opening of the housing 32 is formed in a portion of the cover belt 54 corresponding to the housing 32.

On the left and right sides of the main unit 11 in the moving area of the cutting unit 30, guide rolls 52 are rotatably arranged in three stages, and a steel belt 51 corresponding to one shielding belt is provided here. Is hung. The central portion of the steel belt 51 is guided by the lowermost guide roll 52 and extends in the left-right direction below the cover belt 54, and the left and right end portions are guided by the uppermost left and right guide rolls 52 so as to be processed by the processing table. The left and right ends of the housing 10 are fixed to the left and right ends of the housing 32 of the cutting unit 30. With this steel belt 51
Of the machining table 10
3, the portions located on the left and right sides of the cutting unit 30 are closed by the steel belt 51 from the back side of the processing table 10.

Next, the chucking unit 20 will be described. The chucking unit 20 is provided with a movable frame 21 movably back and forth with respect to the processing table 10 by a guide mechanism (not shown), and a plurality of (in this embodiment, nine) work fixing mechanisms 22 are provided on the movable frame 21. It is configured to be attached. The work fixing mechanism 22 is shown in detail in FIGS.

A holder 28 having a substantially U shape as viewed from above is attached to the movable frame 21 so as to be integrally movable. The holder 28 includes a back wall 28A fixed to the movable frame 21, and a pair of side walls 28B, 28B extending forward from left and right side edges of the back wall 28A. Sidewall 28
The front end of B protrudes inward, and a guide groove 28C having a constant width is formed between the two protruding portions. The holder 28 is floating with a slight gap from the work supporting surface 14 of the processing table 10.

At the upper end position on the front surface of the back wall 28A, an air cylinder 23 for a pressing member has a rod 23A.
Is fixed in a posture in which it protrudes downward, and a pressing member 24 is attached to this rod 23A so as to be integrally displaceable. The holding member 24 has a long and horizontal plate shape in the front-rear direction, and has a rod 23A at its wide rear end.
Is fixed in a cantilevered state. Such a holding member 24
Moves up and down in the guide groove 28C as the rod 23A advances and retreats. The front end portion of the pressing member 24 protrudes forward from the guide groove 28C, and this protruding portion is a pressing portion 24A that protrudes slightly downward.

At the lower end position on the rear surface of the back wall 28A, an air cylinder 25 for a support member is
5A is fixed in a posture in which it projects downward, and a support member 26 is connected to the rod 25A.

The support member 26 has a shape elongated in the front-rear direction as a whole, and is disposed so as to reach from the lower end edge of the rear wall 28A to the lower end of the guide groove 28C. The lower end portion of the support member 26 is housed in the front-back direction accommodation groove 12 formed in the work support surface 14 at a position corresponding to the guide groove 28C of the processing table 10. At a position near the front end of the support member 26, a bearing hole 26B penetrating in the lateral direction is formed.
, A support shaft 27 is freely rotatable therethrough, and both ends of the support shaft 27 are accommodated and fixed in bearing grooves 28D, 28D at lower end edges of the side walls 28B, 28B. Thus, the support member 26 is supported so as to swing and displace about the support shaft 27 as a fulcrum like a seesaw.

A U-shaped groove (not shown) formed at the rear end of the support member 26 is engaged with a cylindrical coupler 29 attached to a rod 25A, and a pair of upper and lower flanges 29A, 29A of the coupler 29. Are positioned so as to sandwich the support member 26 with a gap. As a result, when the rod 25A moves forward and backward, the rear end of the support member 26 is displaced in the vertical direction in conjunction with it, and the front end of the support member 26 is displaced in the vertical direction.

The front end of the support member 26 projects forward from the guide groove 28C in a state where the support member 26 is substantially entirely accommodated in the accommodation groove 12.
And a receiving portion 26A corresponding to the pressing portion 24A.
When the receiving portion 26A is displaced to the uppermost position, the receiving portion 26A protrudes upward from the processing table 10, and the height of the upper surface of the receiving portion 26A becomes slightly higher than the work supporting surface 14. When the receiving portion 26A is displaced to the lowermost position, the receiving portion 26A sinks and is completely accommodated in the accommodation groove 12, and the height of the upper surface of the receiving portion 26A is reduced to the work supporting surface 1A.
It is lower than 4.

Next, the operation of the above configuration will be described.
When the power switch of the apparatus is turned on, a message indicating that “origin search” should be performed is displayed on the display of the operation panel 60. Therefore, when the start operation is performed, the traveling motor 47 of the reciprocating drive mechanism 40 is driven, the cutting unit 30 moves to a predetermined “standby position”, and the position is set as the origin of the horizontal coordinate system of the cutting unit 30. I do.

Next, a required cutting dimension and the like are input on the operation panel 60, the work W is supplied onto the processing table 10, and the start switch of the operation panel 60 is turned on. Then, the chucking unit 20 on the processing table 10 advances to the work W side, and each work fixing mechanism 22 holds and fixes the rear end edge of the work W. In this state, the chucking unit 20 moves to position the workpiece W at a predetermined cutting position.

Then, the traveling motor 47 of the reciprocating drive mechanism 40 is normally rotated by a signal from a position control circuit (not shown), and when the cutting unit 30 reaches the right end of the predetermined moving area, the two circular saws 33 and 34 are moved by the elevating mechanism. Is raised and the traveling motor 47 is now rotated in the reverse direction. As a result, the cutting unit 30 moves from right to left with a part of the circular saws 33, 34 protruding from the slit 13 of the processing table 10, and each of the circular saws 33, 34 encounters the workpiece W. From there, the cutting of the work W is started. Then, when the circular saw for cutting 34 is positioned to the left of the work W, the cutting of the work W is completed.

Thereafter, the cutting unit 30 is moved to the "standby position".
At the same time, the work fixing mechanism releases the work W, the chucking unit 20 moves back to the predetermined standby position, and the released work W is collected. From the above, 1
The cutting cycle of the work W ends.

Next, the work holding operation and the work releasing operation of the work fixing mechanism 22 in the above cutting process will be described. When the chucking unit 20 is moved from the standby position to the work fixing position, the rod 23A of the air cylinder 23 for the pressing member is pulled up to displace the pressing member 24 to the upper position, and the air cylinder 25 for the supporting member is moved. The rod 25A is pulled up to keep the receiving portion 26A at the front end of the support member 26 submerged from the work supporting surface 14. Then, when the chucking unit 20 reaches a predetermined work fixing position,
The pressing portion 24A at the front end of the pressing member 24 and the receiving portion 26A are positioned so as to be sandwiched from above and below without contacting the edge of the work W.

Thereafter, the air cylinder 23 for the holding member and the air cylinder 25 for the supporting member are operated to operate both rods 2.
3A and 25A project downward. Then, the support member 26
Is tilted so that the receiving portion 26A advances above the work supporting surface 14 so as to abut against and support the lower surface of the work W from below, and the pressing portion 24A abuts on the upper surface of the work W and raises it. The work W is sandwiched vertically by the pressing portion 24A and the receiving portion 26A, whereby the work W is fixed to the work fixing mechanism 22.

In this state, the edge of the work W is slightly lifted from the processing table 10 by the support member 26. Therefore, when the chucking unit 20 moves to the cutting position in a state where the work W is fixed, there is no possibility that the edge of the work W is rubbed against the work support surface 14 and is damaged.

When the work fixing mechanism 22 releases the work W after the cutting is completed, the air cylinder 23 for the holding member and the air cylinder 25 for the supporting member operate to raise both rods 23A, 25A upward. To be raised. Then, the pressing member 24 separates from the work W and retreats upward, and the receiving portion 26A of the support member 26 is displaced downward. At this time, while the receiving portion 26A is above the work supporting surface 14, the work W is supported by the receiving portion 26A. When the receiving portion 26A is at the same height as the work supporting surface 14, the lower surface of the work W is supported by the work. Abuts surface 14; Thereafter, the receiving portion 26A separates from the lower surface of the work W and sinks below the work support surface 14, and during this time, the work W
Remains on the work support surface 14.

Therefore, when the chucking unit 20 returns to the standby position after releasing the work W, the edge of the work W is dragged by the chucking unit 20 while riding on the support member 26 and moves. There is no danger.

As described above, in this embodiment, the receiving portion 26A is displaced between the position protruding from the processing table 10 and the position sinking.
Can be fixed without being pressed against the processing table 10, and the support member 26 can be reliably separated from the lower surface of the work W. This prevents the fixed work W from being rubbed against the processing table 10 and being damaged, and also prevents the released work W from being dragged by the work fixing mechanism 22.

Further, in this embodiment, since the support member air cylinder 25 is provided above the processing table 10 like the holding member air cylinder 23, the vertical dimension of the work fixing mechanism 22 is reduced. .

Further, since the support member 26 is supported by the support shaft 27 so as to be tilted and displaced in a seesaw shape, the posture of the support member 26 is more stable than in the case of cantilever support. Therefore, when the work is fixed,
There is no danger that the front end receiving portion 26A will sink below the work supporting surface 14 due to the bending of the work 6, and the contact of the work W with the processing table 10 can be reliably avoided.

Moreover, the support shaft 27 of the support member 26
Is set to be shorter than the distance from the support shaft 27 to the connection portion with the support member air cylinder 25, the support member 26 is
A strong supporting force that resists the pressing force can be exerted.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition, various changes can be made without departing from the scope of the invention.

(1) In the above embodiment, the case where the air cylinder is used as the drive source for displacing the support member has been described. However, according to the present invention, for example, the rotational force of the motor is transmitted via the rack and pinion. A drive mechanism other than the air cylinder, such as moving the support member up and down, can be used.

(2) In the above embodiment, the case where the support member is supported by the support shaft so as to be tilted and displaced in a seesaw shape has been described. However, according to the present invention, the support member is cantilevered similarly to the holding member. Is also good.

[Brief description of the drawings]

FIG. 1 is a front view of a running saw showing one embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a perspective view of a work fixing mechanism.

FIG. 5 is a side view of the work fixing mechanism in a state where the work is released.

FIG. 6 is a side view showing a state where the work is fixed in the work fixing mechanism.

FIG. 7A is an enlarged side view of the work fixing mechanism with the work released, and FIG. 7B is an enlarged side view of the work fixing mechanism with the work fixed.

FIG. 8 is a sectional view showing a reciprocating drive mechanism.

FIG. 9 is a longitudinal sectional view of a cutting unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Processing table 14 ... Work support surface 22 ... Work fixing mechanism 24 ... Holding member 25 ... Air cylinder for support member 26 ... Support member 30 ... Cutting unit (cutting mechanism) 34 ... Circular saw W ... Work

Claims (2)

(57) [Claims] 1. A work table for supporting a work, a work fixing mechanism for fixing the work supported on the work table, and a cutting mechanism for moving the circular saw while rotating the saw,
In the one in which the work fixed by the work fixing mechanism is cut by the cutting mechanism, the work fixing mechanism includes a pressing member that can press the work toward the processing table, and a position where the work protrudes onto the work support surface of the processing table. And a support member provided so as to be displaceable between a position sunk from the work support surface and the support member protruding onto the work support surface when fixing a work. A traveling circular saw machine characterized in that the work is held between the workpiece and the work, and when the work is released, the pressing of the pressing member is released and the support member is lowered from the work supporting surface. 2. A support member is disposed in a posture substantially along the processing table and is pivotally supported so as to be tiltable, and one end of the support member is disposed closer to the pressing member than the processing table. 2. The traveling circular saw according to claim 1, wherein the air cylinder is connected to an air cylinder, and the other end of the support member is displaced in a projecting direction and a sinking direction with respect to a work supporting surface by operation of the air cylinder. Board.