JP6617038B2 - Band saw machine - Google Patents

Description

  The present invention relates to a band saw machine, and more particularly to a band saw machine (band saw) that can prevent an accident in which an operator's hand is caught in a band saw blade during cutting by attaching a safety cover.

  Conventionally, as shown in FIGS. 10 and 11, a band saw machine used for cutting a steel member (hereinafter referred to as a steel material W) such as a square pipe, a steel sheet pile, a guard rail or the like is a band saw provided with a band saw blade 22. The panel main body 21, a table 23 on which the steel material W is placed, and a clamp 24 installed on the table 23 for fixing the steel material W on the table 23 are provided.

  The band saw body 21 can be moved up and down along with the band saw blade 22 along the cylinder 25. The band saw body 21 includes a driving roller side casing 27 in which a driving roller (not shown) is built, a driven roller side casing 26 in which a driven roller (not shown) is built, a driving roller side casing 27 and a driven roller. It is composed of a return band saw blade cover 28 attached between the side casing 26 and a pair of band saw blade guides 29 attached to the return band saw blade cover 28.

  The band saw blade 22 does not swing back and forth between the drive roller in the drive roller side casing 27 and the driven roller in the driven roller side casing 26 by the guide function of the band saw blade guide 29 in FIG. Circulate endlessly in the direction indicated by the arrow.

  The clamp 24 includes a fixed side clamp 24a and a movable side clamp 24b, and horizontally moves the movable side clamp 24b in the direction of the fixed side clamp 24a, and sandwiches the steel material W between the fixed side clamp 24a and the movable side clamp 24b. Thus, the steel material W is fixed on the table 23.

  As shown in FIGS. 12 and 13, for example, in order to cut the steel material W made of a square pipe, the steel material W is placed on the table 23, the movable side clamp 24b is moved horizontally in the direction of the fixed side clamp 24a, The steel material W is fixed on the table 23.

  Next, as shown in FIGS. 14 and 15, the band saw body 1 is lowered. Thereby, the steel material W is cut by the band saw blade 22 that descends together with the band saw machine body 21. The steel material W may be a single steel material bundle or a plurality of steel material bundles as shown in the illustrated example.

  When cutting the steel material W, a light beam is irradiated to the band saw blade 22 from a light irradiator (not shown) installed in the band saw machine body 21 above the steel material W, and a linear shadow due to this is applied to the upper surface of the steel material W. Projected. Therefore, if this shadow and the band saw blade 22 are made to coincide, the steel material W can be cut accurately.

  According to the conventional band saw described above, the steel material W can be cut reliably regardless of the number of the steel materials W, but there are the following problems.

  At the time of cutting the steel material W, since the band saw blade 22 is in an exposed state, there is a possibility that an accident in which an operator's hand is caught in the band saw blade 22 may occur. In addition, chips and the like generated along with the cutting of the steel material W may be scattered to workers, which is dangerous.

  Therefore, measures that can prevent such accidents have been desired, but no such measures have been proposed yet.

  Accordingly, the object of the present invention is to prevent the band saw blade from being exposed when the steel material is cut, and to prevent an accident in which the operator's hand is caught in the band saw blade. An object of the present invention is to provide a band saw machine capable of preventing scattering.

  The present invention has been made to achieve the above object, and is characterized by the following.

The invention according to claim 1 is a band saw machine including a band saw body that can be moved up and down, and cuts a steel material fixed on a table by a band saw blade that circulates endlessly, wherein the band saw blade is disposed in front of the band saw blade. The safety cover is lowered together with the band saw body to a lower limit position where the safety cover comes into contact with the upper surface of the steel material, and thereafter stops at the lower limit position. The attachment mechanism is attached to the band saw body, and the attachment mechanism guides the safety cover to be lifted and lowered, and a suspension bar for attaching the safety cover to the band saw body, and the safety cover is made of the steel material. It comprises a guide bar that holds the safety cover at the lower limit position after contacting the upper surface .

The invention described in claim 2 is characterized in that, in the invention described in claim 1, the safety cover comprises a fence body.

The invention described in claim 3 is characterized in that, in the invention described in claim 2 , the fence body has a planar shape.

The invention described in claim 4 is characterized in that, in the invention described in claim 2 , the fence body has a U-shape.

  According to this invention, when cutting a steel material, the band saw blade is not exposed, and an accident in which an operator's hand is caught in the band saw blade can be prevented.

It is a front view which shows the band saw machine of this invention. It is a side view which shows the band saw machine of this invention. It is a front view which shows the band saw machine of this invention which fixed steel materials on the table. It is a side view which shows the band saw of this invention which fixed the steel material on the table. It is a front view which shows the band saw machine of this invention which lowered the band saw blade. It is a side view which shows the band saw machine of this invention which lowered | hung the band saw blade. It is a front view which shows the band saw machine of this invention during steel cutting. It is a side view which shows the band saw of this invention during steel cutting. It is a side view which shows the band saw machine of this invention to which the U-shaped safety cover was attached. It is a front view which shows the conventional band saw machine. It is a side view which shows the conventional band saw machine. It is a front view which shows the conventional band saw machine which fixed steel materials on the table. It is a side view which shows the conventional band saw machine which fixed the steel material on the table. It is a front view which shows the conventional band saw machine during steel cutting. It is a side view which shows the conventional band saw machine during steel cutting.

  An embodiment of the band saw of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a band saw machine according to the present invention, and FIG. 2 is a side view showing the band saw machine according to the present invention.

  In FIG. 1, 1 is a band saw body in which a band saw blade 2 is installed, 3 is a table on which a steel member (hereinafter referred to as a steel material W) such as a square pipe, a steel sheet pile, and a guard rail is placed, 4 is a table 3 It is a clamp installed on the table 3 to fix the steel material W on the table 3.

  The band saw machine body 1 can be moved up and down along with the cylinder 5 together with the band saw blade 2. The band saw body 1 includes a driving roller side casing 7 in which a driving roller (not shown) is incorporated, a driven roller side casing 6 in which a driven roller (not shown) is incorporated, and the driving roller side casing 7 and the driven roller side. It is composed of a return band saw blade cover 8 attached between the casing 6 and a pair of band saw blade guides 9 attached to the return band saw blade cover 8.

  The band saw blade 2 is not swung back and forth between the driving roller in the driving roller side casing 7 and the driven roller in the driven roller side casing 6 by the guide function of the band saw blade guide 9 in FIG. Circulate endlessly in the direction indicated by the arrow.

  The clamp 4 includes a fixed side clamp 4a and a movable side clamp 4b. The movable side clamp 4b is horizontally moved in the direction of the fixed side clamp 4a, and the steel material W is sandwiched between the fixed side clamp 4a and the movable side clamp 4b. Thus, the steel material W is fixed on the table 3.

  A safety cover 10 is attached to the front of the band saw blade 2 (the front side in FIG. 1) with a gap from the band saw blade 2. The safety cover 10 is made of a fence body having a planar shape, has a length that covers almost the entire length of the band saw blade 2, the band saw blade 2 is not exposed, and an operator's hand is caught in the band saw blade 2. It has a function to prevent

  The safety cover 10 is lowered together with the band saw body 1 to the lower limit position where the safety cover 10 abuts on the upper surface of the steel material W, and thereafter is attached to the band saw body 1 by the attachment mechanism 11 so as to stop at the lower limit position.

  The attachment mechanism 11 guides the lifting and lowering of the safety cover 10 with a pair of vertical suspension bars 12 that suspend and attach the safety cover 10 to the band saw body 1, and after the safety cover 10 comes into contact with the upper surface of the steel material W, It comprises a pair of vertical guide bars 13 that hold the safety cover 10 at the lower limit position.

  The suspension bar 12 is inserted through a guide plate 14 attached to the upper part of the return band saw blade cover 8 of the band saw body 1, and the lower end of the suspension bar 12 is fixed to the upper part of the safety cover 10. A stopper 15 that prevents the suspension bar 12 from coming off from the guide plate 14 is attached to the upper end of the suspension bar 12. Thereby, the safety cover 10 is attached to the band saw body 1 in a suspended state.

  The guide bar 13 is fixed to a pedestal 16 installed between the driving roller side casing 7 and the driven roller side casing 6. The guide bar 13 is inserted through the brackets 17 attached to both sides of the safety cover 10, whereby the safety cover 10 can be moved up and down along the guide bar 13.

  When replacing the band saw blade 2, the covers of the driving roller side casing 7 and the driven roller side casing 6 are opened and closed. The safety cover 10 and the guide bar 13 are provided between the driving roller side casing 7 and the driven roller side casing 6. Therefore, it does not hinder the opening and closing of the cover when replacing the band saw blade 2.

  As described above, the safety cover 10 is attached to the band saw body 1 by the attachment mechanism 11, so that the safety cover 10 is lowered together with the band saw body 1 to the lower limit position in contact with the upper surface of the steel material W. Thereafter, It stops at the lower limit position.

  For example, in order to cut a steel material W made of a square pipe with the band saw machine of the present invention, as shown in FIGS. 3 and 4, the steel material W is placed on the table 3, and the movable side clamp 4b is connected to the fixed side clamp 4a. The steel material W is fixed on the table 3 by horizontally moving in the direction.

  Next, as shown in FIGS. 5 and 6, the band saw body 1 is lowered. As a result, the steel material W is cut by the band saw blade 2 that descends together with the band saw body 1. The steel material W may be a single steel material bundle or a plurality of steel material bundles as shown in the illustrated example.

  When cutting the steel material W, a light beam is irradiated to the band saw blade 2 from a light irradiator (not shown) installed in the band saw body 1 above the steel material W, and a linear shadow due to this is applied to the upper surface of the steel material W. Although projected, the safety cover 10 is attached to the front of the band saw blade 2 with a gap from the band saw blade 2, so that the projection onto the upper surface of the steel material W is not hindered. Therefore, if this shadow and the band saw blade 2 match, the steel material W can be cut accurately.

  As the band saw body 1 is lowered, the safety cover 10 is also lowered by its own weight along the guide bar 13, but after the safety cover 10 comes into contact with the upper surface of the steel material W, the band saw machine body 1 and the safety cover 10 Is not fixed in the vertical direction, and the safety cover 10 can freely move up and down along the guide bar 13, so that the safety cover 10 is in contact with the upper surface of the steel material W. Stops at the lower limit position. Thereafter, as shown in FIGS. 7 and 8, only the band saw blade 2 is lowered, and the cutting is continued without any trouble until the end.

  Thus, as the band saw machine body 1 is lowered, the safety cover 10 is lowered, so that the band saw blade 2 is not exposed, and an accident in which an operator's hand is caught in the band saw blade 2 can be prevented. be able to.

  In the example described above, the safety cover 10 is configured by a fence body having a planar shape, but may be configured by a fence body having a U-shape as illustrated in FIG. 9. By making it U-shaped, the upper and lower sides of the safety cover 10 are closed, so that it is possible to more reliably prevent the operator's hand from being caught.

  Moreover, as long as the safety cover 10 has a planar shape, the safety cover 10 is not limited to a fence body, and may be composed of an iron plate, an expanded metal, a synthetic resin material, or the like.

  As described above, according to the present invention, the safety cover 10 is attached to the front of the band saw blade 2 at a distance from the band saw blade 2, and the safety cover 10 is moved to the lower limit position where it abuts on the upper surface of the steel material W. After being lowered together with the band saw body 1, and thereafter attached to the band saw body 1 by the attachment mechanism 11 so as to stop at the lower limit position, the band saw blade 2 is not exposed when the steel material W is cut. Can be prevented from being accidentally caught in the band saw blade 2.

  Further, according to the present invention, when the cutting operation is confirmed, the confirmation operation can be performed safely without the chips being scattered to the operator.

1: Band saw machine body 2: Band saw blade 3: Table 4: Clamp 5: Cylinder 6: Driven roller side casing 7: Drive roller side casing 8: Cover for return band saw blade 9: Guide for band saw blade 10: Safety cover 11: Installation Mechanism 12: Suspension bar 13: Guide bar 14: Guide plate 15: Stopper 16: Stand 17: Bracket 21: Band saw machine body 22: Band saw blade 23: Table 24: Clamp 25: Cylinder 26: Driven roller side casing 27: Drive Roller side casing 28: Cover for return band saw blade 29: Guide for band saw blade

Claims (4)

In a band saw machine with a band saw body that can be lifted and lowered, which cuts a steel material fixed on a table by a band saw blade that circulates in an endless manner,
In front of the band saw blade, it has a safety cover attached with a gap from the band saw blade, and the safety cover descends together with the band saw body to a lower limit position where the safety cover contacts the upper surface of the steel material, After that, it is attached to the band saw body by an attachment mechanism so as to stop at the lower limit position ,
The attachment mechanism includes a suspension bar that hangs the safety cover on the band saw body and guides the raising and lowering of the safety cover. After the safety cover comes into contact with the upper surface of the steel material, the safety cover is A band saw machine comprising a guide bar held at a lower limit position . The band saw machine according to claim 1, wherein the safety cover is a fence body. The band saw machine according to claim 2 , wherein the fence body has a planar shape. The band saw machine according to claim 2 , wherein the fence body has a U-shape.

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