JP5524566B2 - Band saw blade clamping method by band saw blade guide device and band saw blade guide device - Google Patents

Description

  The present invention relates to a band saw blade clamping method and a band saw blade guide device using a band saw blade guide device in a band saw machine. More specifically, the band saw blade body is formed by a fixed insert block and a movable insert block provided in the band saw blade guide device. When sandwiching and guiding, the gap between the fixed insert block and the movable insert block is always maintained at an appropriate gap even when the thickness of the body portion of the band saw blade varies depending on the type of the band saw blade. The present invention relates to a band saw blade holding method using a band saw blade guide device and a band saw blade guide device.

  There are two types of band saw machines: vertical band saw machines and horizontal band saw machines.When cutting a workpiece with the band saw blades, the band saw blade body is positioned at both sides of the workpiece close to the workpiece. A band saw blade guide device is provided for holding and guiding. The band saw blade guide device includes a back support member for supporting and guiding the back portion of the band saw blade, a fixed insert block and a movable insert block for sandwiching and guiding the trunk portion of the band saw blade, and the movable insert block being fixed. Insert block pressing means for pressing toward the insert block side.

  Conventionally, the insert block pressing means generally has a configuration in which an eccentric cam is rotated to press the movable insert block, or a configuration in which the movable insert block is pressed by a small hydraulic cylinder. In the configuration using the eccentric cam, the position where the movable insert block is moved to the fixed insert block side is always constant, so that the position between the fixed insert block and the movable insert block corresponds to the thin band saw blade of the body portion. When the gap is set to an appropriate gap, in the case of a band saw blade having a thick body, there is a problem that the body of the band saw blade may be firmly held between the fixed insert block and the movable insert block. On the contrary, when the gap is set corresponding to the band saw blade having a thick body, in the case of the band saw blade having a thin body, a large gap is generated between the saw blade and the insert block, and the band saw blade is inclined and bent. There is a problem that it is easy to produce.

  In the configuration in which the movable insert block is pressed by a small hydraulic cylinder, the band saw blade body is always firmly held and guided by the fixed insert block and the movable insert block regardless of the thickness of the band saw blade. Therefore, there is a problem that both insert blocks are heavily worn and the power for driving the band saw blade is increased.

  In view of this, the movable insert block is slightly returned after the body portion of the band saw blade is firmly held between the fixed insert block and the movable insert block (see, for example, Patent Document 1).

JP 2003-340640 A

  In the configuration described in Patent Document 1, the movable insert block is moved to the fixed insert block side by the hydraulic cylinder, and the body portion of the band saw blade is firmly sandwiched between the fixed insert block and the movable insert block. The pressure oil inside is sucked into the small cylinder of the booster and the movable insert block is slightly returned. Therefore, the gap between the fixed insert block and the movable insert block can be maintained at an appropriate gap regardless of the thickness of the body portion of the band saw blade.

  However, since the hydraulic circuit has a booster, there is a problem that the configuration of the hydraulic circuit is complicated.

  The present invention has been made in view of the above-described problems, and is a band saw blade guide device in a band saw machine, and a back support that supports and guides the back portion of the band saw blade on a main body block provided in the band saw blade guide device. A fixed insert block and a movable insert block for sandwiching and guiding a body portion of a band saw blade, and an insert block pressing means for pressing the movable insert block toward the fixed insert block. The gap between the fixed insert block and the movable insert block is adjusted in order to keep the gap between the block and the movable insert block at an appropriate gap corresponding to the thickness of the body portion of the band saw blade to be clamped. A gap adjusting means for reciprocating in an actuator provided in the main body block. A swing lever for swinging by a moving element is provided in the main body block, and the swing lever for pressing the movable insert block to restrict the insert block from being closer to the fixed insert block than necessary. Further, a stopper member for restricting the operating position of the swing lever is provided on the swing lever so that the protrusion length can be adjusted and the main body block can be contacted.

  Also, a band saw blade guide device in a band saw machine, for sandwiching and guiding a back portion supporting member for supporting and guiding the back portion of the band saw blade and a body portion of the band saw blade to a main body block provided in the band saw blade guide device. A fixed insert block and a movable insert block, and an insert block pressing means for pressing the movable insert block toward the fixed insert block, and holds a gap between the fixed insert block and the movable insert block. A gap adjusting means for adjusting a gap between the fixed insert block and the movable insert block in order to maintain an appropriate gap corresponding to the thickness of the barrel portion of the power saw blade, the gap adjusting means, The movable insert block is moved forward by the tip end of a swing lever provided swingably on the main body block. An eccentric cam for oscillating the oscillating lever for pressing toward the fixed insert block, a bracket provided on the main body block having an adjustable rotational position, or the movable insert block with an eccentric portion In order to press the shaft toward the fixed insert block, an eccentric cam provided with an eccentric portion on the distal end side of the swing lever is rotatably provided.

  According to the present invention, the gap between the fixed insert block and the movable insert block provided in the band saw blade guide device is set in advance corresponding to the thickness of the body portion of the band saw blade and is held in the set gap. Since the body portion of the band saw blade is sandwiched and guided, the gap can always be held in an appropriate gap. Then, the movable insert block need only be moved to the fixed insert block side without returning slightly after moving to the fixed insert block side, and can be implemented with a simple configuration.

It is action explanatory drawing which showed notionally and schematically the structure of the band saw blade guide apparatus which concerns on embodiment of this invention. It is a conceptual and schematic explanatory drawing of the band saw blade guide apparatus according to the second embodiment. It is a conceptual and schematic explanatory drawing of the band saw blade guide apparatus which concerns on 3rd Embodiment.

  As conceptually and schematically shown in FIG. 1, a band saw blade guide device 1 according to an embodiment of the present invention includes a main body block 3, and the main body block 3 includes a general saddle type band saw machine, Similar to the band saw blade guide device in the horizontal band saw machine, an appropriate back support member 7 such as a roller or a block for supporting and guiding the back portion 5A of the band saw blade 5 is provided. The main body block 3 is integrally provided with a fixed-side insert arm 11 integrally provided with a fixed insert block 9 for holding and guiding the body portion 5B of the band saw blade 5.

  Further, the main body block 3 is provided with a movable side insert arm 13 that faces the fixed side insert arm 11, and inside the movable side insert arm 13, the fixed side block arm 9 faces the fixed insert block 9. A movable insert block 15 that sandwiches and guides the band saw blade 5 is provided so as to be movable in a direction approaching and separating from the fixed insert block 9. By the way, in this embodiment, the said movable side insert arm 13 is provided in the said main body block 3 integrally. However, the movable side insert arm 13 can be provided so as to be able to move (turn) in a direction approaching and moving away from the fixed side insert arm 11 and to be fixed in a close state.

  The movable insert block 15 is configured to be movable in a direction in which the movable insert block 15 is moved toward and away from the fixed insert block 9, and a distal end portion of a slide rod 17 that movably penetrates the movable insert arm 13 is the movable insert block 15. Are integrally connected to each other. And between the flange part 17F provided in the base end side of this slide rod 17 and the said movable side insert arm 13, the coil spring etc. which urge the said movable insert block 15 in the direction away from the fixed insert block 9 etc. An elastic member 19 such as is elastically mounted.

  Furthermore, the main body block 3 is provided with an insert block pressing means 21 for pressing the movable insert block 15 toward the fixed insert block 9. More specifically, a swing lever 27 is supported by a bracket 23 provided in the main body block 3 via a pivot 25 so as to be swingable (rotatable), and a tip end (lower end portion) of the swing lever 27 is supported. ) Is in contact with the flange portion 17F of the slide rod 17. In order to oscillate the oscillating lever 27, the main body block 3 is provided with a direct acting actuator 29 such as a fluid pressure cylinder. The tip of a reciprocating actuator 31 such as a piston rod that reciprocates in the direct acting actuator 29 abuts on a contacted member 33 provided on the base end side (upper end side) of the swing lever 27. It is.

  With the above configuration, when the linear actuator 29 is operated and the swing lever 27 is rotated clockwise in FIG. 1 by the reciprocating element 31, the slide rod 17 is moved by the lower end of the swing lever 27. It will be pressed against the urging force of the elastic member 19. Therefore, the movable insert block 15 is moved to the fixed insert block 9 side, and the body portion of the band saw blade 5 is firmly clamped by the fixed insert block 9 and the movable insert block 15.

  As described above, when the workpiece (not shown) is cut in a state where the band saw blade 5 is firmly clamped by the fixed insert block 9 and the movable insert block 15, both inserts can be suppressed. There is a problem that the friction between the blocks 9 and 15 and the band saw blade 5 is large and the wear of both the insert blocks 9 and 15 becomes severe.

  Therefore, in this embodiment, in order to maintain the gap between the fixed insert block 9 and the movable insert block 15 at a gap set in advance corresponding to the thickness of the body portion 5B of the band saw blade 5, An operation position limiting means 35 for limiting the operation position of the insert block pressing means 21 is provided. More specifically, the operating position restricting means 35 is an adjustment screw or the like that can adjust the protruding length from the swing lever 27 toward the main body block 3 and that can be freely brought into contact with the main body block 3. The stopper member 37 is used.

  Therefore, when the distal end portion of the stopper member 37 abuts on the main body block 3 and the operation of the swing lever 27 is restricted and restricted, the movable insert block 15 is restricted from approaching the fixed insert block 9 more than necessary. The fixed insert block 9 and the movable insert block 15 can prevent the body portion 5B of the band saw blade 5 from being pinched firmly. Therefore, the gap between the fixed insert block 9 and the movable insert block 15 can be held at an appropriate gap corresponding to the thickness of the band saw blade 5. That is, it is possible to effectively suppress the bending of the workpiece by the band saw blade 5 and to keep the friction between the fixed insert block 9, the movable insert block 15 and the band saw blade 5 small.

  By the way, the operation position restricting means 35 has a function of adjusting the gap between the fixed insert block 9 and the movable insert block 15 to an appropriate gap corresponding to the thickness of the body 5B of the band saw blade 5. Therefore, it can also be called a gap adjusting means. As a configuration in which the gap between the fixed insert block 9 and the movable insert block 15 is adjustable when the body portion 5B of the band saw blade 5 is sandwiched and guided by the fixed insert block 9 and the movable insert block 15, The abutted member 33 may be formed of an adjusting screw, and the protruding length of the abutted member 33 toward the reciprocating element 31 may be adjustable. In this case, the contacted member 33 can be referred to as an operation position limiting means (gap adjusting means).

  In the above configuration, when the movable insert block 15 is largely separated from the fixed insert block 9 and the gap between the fixed insert block 9 and the movable insert block 15 is wide, in other words, For example, when the movable insert block 15 is located at the reference position, the body portion 5B of the band saw blade 5 is disposed between the fixed insert block 9 and the movable insert block 15, and the back portion 5A of the band saw blade 5 is placed on the back support member. 7 abuts.

  Then, by adjusting the protruding length of at least one of the abutted member (adjustment screw) 33 or the stopper member (adjustment screw) 37 as an example of the operation position limiting means 35, the fixed insert block 9 and the movable insert block 15, the gap between the insert blocks 9 and 15 when the band saw blade 5 is sandwiched and guided is preset. After that, when the direct acting actuator 29 is operated and the swing lever 27 is swung to move the movable insert block 15 toward the fixed insert block 9 as described above, the operating range of the swing lever 27 is as described above. The operation position restriction means 35 restricts the position to a preset position.

  Therefore, when the movable insert block 15 is closed and the body 5B of the band saw blade 5 is sandwiched between the fixed insert block 9 and the movable insert block 15, the gap between the fixed insert block 9 and the movable insert block 15 is as follows. In this case, the gap is held in an appropriate gap set in advance. Therefore, the bending at the time of cutting the workpiece is suppressed, and the frictional resistance between the fixed insert block 9, the movable insert block 15 and the band saw blade 5 can be reduced.

  The present invention is not limited to the above-described embodiments, and can be implemented in other forms by making appropriate changes. That is, as the configuration of the operation position limiting means 35, for example, as shown in FIG. 2, an eccentric cam 41 is rotatably provided in a bracket 39 provided in the main body block 3, and the eccentric portion of the eccentric cam 41 is set as a swing lever 27. It is also possible to adopt a configuration in which a long hole provided on the upper side of the shaft is rotatably fitted. According to this configuration, when the eccentric cam 41 is rotated, the swing lever 27 is swung around the pivot 25. Therefore, the clearance between the fixed insert block 9 and the movable insert block 15 when the band saw blade 5 is sandwiched by adjusting the rotational position of the eccentric cam 41 and locking it by a locking means (not shown), The gap can be adjusted to an appropriate gap corresponding to the thickness of the band saw blade 5.

  Further, as shown in FIG. 3, the operation position limiting means 35 is configured such that the protrusion length of the pressing member 43 that presses the slide rod 17 is adjustable on the tip side of the swing lever 27. Is also possible. As a configuration for adjusting the protruding length of the pressing member 43, an eccentric cam 45 is rotatably provided on the distal end side of the swing lever 27, and the eccentric portion of the eccentric cam 45 is placed in a long hole provided in the pressing member 43. It is also possible to adopt a configuration in which the protruding length of the pressing member 43 is adjusted by fitting freely and turning the eccentric cam 45. Further, the slide rod 17 can be directly pressed by the eccentric portion of the eccentric cam 45.

  Further, the main body block 3 is rotatably provided with a polygonal eccentric cam having different dimensions from the rotation center to each side, and the eccentric cam presses the upper side of the rocking lever 27 to thereby swing the rocking lever. It is also possible to adopt a configuration for controlling the 27 swing ranges.

  As can be understood from the above description, the gap between the fixed insert block 9 and the movable insert block 15 when the band saw blade 5 is clamped and guided is adjusted in advance according to the thickness of the band saw blade 5. An appropriate gap can be set. Since the movable insert block 15 when the band saw blade 5 is sandwiched can be mechanically fixed in an immovable state, the overall configuration of the band saw blade guide device 1 can be simplified.

DESCRIPTION OF SYMBOLS 1 Band saw blade guide apparatus 3 Main body block 5 Band saw blade 7 Back support member 9 Fixed insert block 11 Fixed side insert arm 15 Movable insert block 17 Slide rod 21 Insert block pressing means 27 Oscillating lever 29 Direct acting actuator 31 Reciprocating actuator 33 Contacted member (adjustment screw)
35 Operating position limiting means (gap adjusting means)
37 Stopper member (adjustment screw)

Claims (2)

A band saw blade guide device in a band saw machine, a back support member for supporting and guiding the back portion of the band saw blade on a main body block provided in the band saw blade guide device, and fixing for sandwiching and guiding the body portion of the band saw blade A band saw that includes an insert block, a movable insert block, and an insert block pressing means for pressing the movable insert block toward the fixed insert block, and a gap between the fixed insert block and the movable insert block should be clamped A gap adjusting means for adjusting a gap between the fixed insert block and the movable insert block in order to maintain an appropriate gap corresponding to the thickness of the body of the blade, and the gap adjusting means includes the body A swing lever that is swung by a reciprocating actuator in an actuator provided in the block is connected to the main body block. In order to restrict the insert block from approaching the fixed insert block more than necessary, the swing lever for pressing the movable insert block is limited to the operating position of the swing lever. A band saw blade guide device comprising a stopper member that can be adjusted to projecting length on the swing lever and can be brought into contact with the main body block. A band saw blade guide device in a band saw machine, a back support member for supporting and guiding the back portion of the band saw blade on a main body block provided in the band saw blade guide device, and fixing for sandwiching and guiding the body portion of the band saw blade A band saw that includes an insert block, a movable insert block, and an insert block pressing means for pressing the movable insert block toward the fixed insert block, and a gap between the fixed insert block and the movable insert block should be clamped A gap adjusting means for adjusting a gap between the fixed insert block and the movable insert block in order to maintain an appropriate gap corresponding to the thickness of the body of the blade, and the gap adjusting means includes the body The movable insert block is fixed on the front end side of a swing lever that is swingably provided on the block. An eccentric cam for swinging the swing lever for pressing toward the insert block side, a bracket provided on the main body block having an adjustable rotational position, or the movable insert block with an eccentric portion. A band saw blade guide device comprising an eccentric cam provided with an eccentric portion on the tip end side of the swing lever so as to be rotatable in order to press the fixed insert block.

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