JP2016175158A - Hole opening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hole opening device which achieves excellent producibility and inhibits occurrence of burrs.SOLUTION: A hole opening device 1 includes: a drill D which opens a hole in a workpiece W; a spindle part 12 which rotatably holds the drill D; a drill bush 40 which is disposed facing the spindle part 12 and presses the workpiece W to the spindle part 12 side when the hole is opened in the workpiece W; and a belt-like sheet S sandwiched between the drill bush 40 and the workpiece W when the hole is opened in the workpiece W.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a punching device.

  2. Description of the Related Art A drilling device that drills holes in a workpiece such as a printed circuit board with a drill is known. For example, Patent Document 1 discloses a table, a spindle capable of rotating and lifting while holding a tool for processing a printed circuit board placed on the table, and a presser that presses the printed circuit board against the table when processing the printed circuit board. And a drilling device comprising the device.

  Generally, the drilling device performs drilling in a state in which the workpiece is pressed by the receiving member from the side opposite to the drill toward the drill side. The receiving member is provided so as to be replaceable. When the receiving member is used for the first time after replacement, a hole is opened by a drill together with the workpiece. A drill is inserted into the hole of the receiving member opened at the first use every time the second and subsequent holes are drilled. The hole of the receiving member is gradually widened due to minute blurring of the drill as the drill is repeatedly inserted by drilling.

Japanese Patent No. 5138273

However, in the conventional drilling device, when the hole diameter of the receiving member increases, a gap is generated between the hole of the receiving member and the drill when the workpiece is drilled.
When the drill penetrates the workpiece, a part of the material constituting the workpiece is pushed into the gap between the hole of the receiving member and the drill. For this reason, a burr | flash generate | occur | produces in the opening edge of the hole formed in the workpiece | work so that it may protrude toward the receiving member side.
Moreover, in order to suppress generation | occurrence | production of a burr | flash, it is possible to replace a receiving member before the hole of a receiving member spreads to a predetermined magnitude | size. However, if the receiving member is frequently replaced, the drilling process must be interrupted each time the replacement is performed, resulting in a reduction in manufacturing efficiency. Therefore, the conventional drilling device has a problem in that the generation of burrs is prevented while suppressing a decrease in manufacturing efficiency.

  Accordingly, the present invention provides a drilling device that is excellent in manufacturing efficiency and can suppress the generation of burrs.

The drilling device of the present invention is arranged to face a drill for making a hole in a work, a drill holding part for holding the drill rotatably, and the drill holding part. A receiving member that presses toward the drill holding portion side, and a sheet-like interposed member that is sandwiched between the receiving member and the workpiece when the workpiece is drilled.
According to the present invention, since the sheet-like interposition member is sandwiched between the receiving member and the work when the work is punched, the opening edge of the work on the receiving member side can be covered with the interposition member. Thereby, when a drill penetrates a workpiece | work, it can prevent that the material which comprises a workpiece | work contacts an interposition member, and is extruded to the clearance gap between the hole of a receiving member and a drill from the opening edge by the side of the receiving member of a workpiece | work. Therefore, even when the hole diameter of the receiving member expands to a predetermined size when drilling the workpiece, it is possible to suppress the occurrence of burrs at the opening edge on the receiving member side of the workpiece without replacing the receiving member. In addition, since the interposition member is in the form of a sheet, it is easy to convey, so that an unused interposition member can be easily introduced between the receiving member and the workpiece. For this reason, compared with the case where a receiving member is replaced | exchanged in order to suppress generation | occurrence | production of a burr | flash, generation | occurrence | production of a burr | flash can be suppressed easily. Therefore, it can be set as the punching apparatus which is excellent in manufacturing efficiency and can suppress generation | occurrence | production of a burr | flash.

In the above punching device, it is desirable that the interposition member is formed in a band shape.
According to the present invention, since the interposed member is formed in a band shape, the interposed member can be moved between the receiving member and the workpiece. By moving the intervening member, the used portion of the intervening member is moved outward from between the receiving member and the workpiece, and an unused portion of the intervening member is introduced between the receiving member and the workpiece. Can be pinched. Therefore, an unused portion of the interposition member can be introduced between the receiving member and the workpiece without interrupting the drilling process, and a reduction in manufacturing efficiency can be suppressed.

In the above punching device, the interposition member can be wound, a first reel to which one end of the interposition member is connected, the interposition member can be wound, and the other end of the interposition member is It is desirable that an interposed member holding unit having a second reel to be connected is provided, and the interposed member holding unit is detachably provided to the receiving member.
According to the present invention, since the punching device includes the interposition member holding unit that is detachable with respect to the receiving member, the first reel and the first reel after the interposition member wound around the first reel and the second reel are used. Two reels can be exchanged together with the interposing member holding unit. Therefore, the time for interrupting the drilling process can be shortened, and a decrease in manufacturing efficiency can be suppressed.

In the hole punching device, it is desirable that the interposition member holding unit moves integrally with the receiving member.
According to the present invention, since the interposition member holding unit moves integrally with the receiving member, it is possible to prevent the interposition member from being pulled out from the first reel and the second reel along with the movement of the receiving member. For this reason, it can prevent that troubles, such as being inserted between a receiving member and a workpiece | work in the state which the interposed member slackened, cannot press a workpiece | work appropriately, for example. Therefore, it is possible to precisely drill a workpiece.

In the punching device described above, a driving source for rotating the first reel and winding the intermediate member wound around the second reel around the first reel, and a load on the rotation of the second reel It is desirable to provide a resistance applying means for applying the resistance.
According to the present invention, the first reel is driven to rotate by the drive source, and the intermediate member wound around the second reel is taken up by the first reel. Can be automatically and easily performed. In addition, since the punching device includes a resistance applying unit that applies a load to the rotation of the second reel, the second reel is required due to inertia when the interposed member is pulled out from the second reel by the rotation of the first reel. By rotating as described above, it is possible to prevent the interposition member drawn from the second reel from becoming slack. Therefore, the manufacturing efficiency is improved, and the work can be precisely drilled.

In the above hole punching device, it is desirable that the first reel and the second reel are disposed on the opposite side of the drill holding portion across the surface of the receiving member on the drill holding portion side.
According to the present invention, since the first reel and the second reel are disposed on the opposite side of the drill holding portion across the surface of the receiving member on the drill holding portion side, the arrangement of the first reel and the second reel is arranged. The position can be set without considering the contact with the workpiece. For this reason, for example, the interposing member holding unit can be reduced in size by arranging the first reel and the second reel close to each other.

  According to the present invention, since the sheet-like interposition member is sandwiched between the receiving member and the work when the work is punched, the opening edge of the work on the receiving member side can be covered with the interposition member. Thereby, when a drill penetrates a workpiece | work, it can prevent that the material which comprises a workpiece | work contacts an interposition member, and is extruded to the clearance gap between the hole of a receiving member and a drill from the opening edge by the side of the receiving member of a workpiece | work. Therefore, even when the hole diameter of the receiving member expands to a predetermined size when drilling the workpiece, it is possible to suppress the occurrence of burrs at the opening edge on the receiving member side of the workpiece without replacing the receiving member. In addition, since the interposition member is in the form of a sheet, it is easy to convey, so that an unused interposition member can be easily introduced between the receiving member and the workpiece. For this reason, compared with the case where a receiving member is replaced | exchanged in order to suppress generation | occurrence | production of a burr | flash, generation | occurrence | production of a burr | flash can be suppressed easily. Therefore, it can be set as the punching apparatus which is excellent in manufacturing efficiency and can suppress generation | occurrence | production of a burr | flash.

It is a perspective view of the punching device concerning this embodiment. It is explanatory drawing explaining the structure of a drilling apparatus, and is the fragmentary sectional view which looked at the drilling apparatus from the front. It is a perspective view of a press unit. It is a disassembled perspective view of a press unit. It is sectional drawing in the VV line | wire of FIG. It is a top view of a press unit.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a punching device according to the present embodiment. The punching device is used in a state where it is placed on a horizontal installation surface. In the drawing, the direction in which the arrow UP points coincides with the vertically upward direction.

As shown in FIG. 1, the drilling device 1 includes a spindle portion 12 (corresponding to a “drill holding portion” in the claims) on which a drill D (see FIG. 2) is attached in the vertical direction. By moving along the direction (vertical direction), a hole is made in the workpiece W such as a printed board. The punching device 1 includes a housing 2 and a cover 3 that covers the upper surface of the housing 2.
The housing | casing 2 is formed in the rectangular parallelepiped shape. On the upper surface of the housing 2, a work table 5 on which the work W is placed along the horizontal direction, and a work movement mechanism (not shown) that moves the work W placed on the work table 5 along the front-rear direction. ) And are arranged. In FIG. 1, the direction along the longitudinal direction when the housing 2 is viewed from the top and bottom direction is defined as the left and right direction, and an arrow LH is attached, and the direction in which the arrow LH is directed is defined as the left side. In FIG. 1, the direction along the short direction when the housing 2 is viewed from the top and bottom direction is defined as the front-rear direction and an arrow FR is attached, and the direction in which the arrow FR is oriented is defined as the front and will be described below. To do.

  On the upper surface of the housing 2, a pair of processed portions 10 are arranged along the left-right direction. The pair of processing units 10 is configured to be movable individually along the left-right direction within a predetermined range by a gantry moving mechanism (not shown) configured by, for example, a linear actuator. In addition, a pair of process part 10 is formed in plane symmetry with respect to the surface orthogonal to the left-right direction. Therefore, in the following description, the left processing unit 10 will be mainly described, and portions corresponding to the left processing unit 10 in the right processing unit 10 are denoted by the same reference numerals and description thereof is omitted.

FIG. 2 is an explanatory view illustrating the configuration of the drilling device, and is a partial cross-sectional view of the drilling device as viewed from the front.
As shown in FIG. 2, the processing unit 10 includes a gantry 11, a spindle unit 12 supported so as to be movable in the vertical direction with respect to the gantry 11, and a spindle movement that moves the spindle unit 12 in the vertical direction. A mechanism (not shown). The spindle unit 12 holds the drill D in a rotatable manner. A box-shaped pressing member 13 that covers the spindle portion 12 and the drill D is attached to the lower end portion of the spindle portion 12. The pressing member 13 is movable in the vertical direction with respect to the spindle portion 12 by sliding on the outer peripheral surface of the spindle portion 12. The pressing member 13 is urged downward with respect to the spindle portion 12 by an urging member (not shown). A drill hole 13 a coaxial with the drill D is formed at the lower end of the pressing member 13. When the spindle unit 12 is moved downward by the spindle moving mechanism while the drill D is driven to rotate, the drill D opens a hole in the work W placed on the work table 5 through the drill hole 13a. At this time, the pressing member 13 urged downward with respect to the spindle portion 12 contacts the workpiece W from above, and presses the workpiece W from above to below.

Further, the punching device 1 has a pressing unit 20 arranged on the opposite side of the spindle portion 12 with the work table 5 interposed therebetween. Similar to the processing unit 10, the pressing unit 20 is configured to be movable along the left-right direction.
FIG. 3 is a perspective view of the pressing unit. FIG. 4 is an exploded perspective view of the pressing unit. In the following drawings, a part of a sheet S described later is indicated by a two-dot chain line for easy understanding.
As shown in FIGS. 3 and 4, the pressing unit 20 includes a drill bush support unit 21 and a sheet holding unit 22 (corresponding to an “interposition member holding unit” in the claims).

As shown in FIG. 4, the drill bush support unit 21 includes a base member 23, a drill bush support portion 32, a drill bush support cylinder 38, a drill bush 40 (corresponding to a “receiving member” in the claims), Have
The base member 23 is formed in a rectangular parallelepiped shape that is long in the front-rear direction. A pair of guide shaft insertion holes 24 penetrating the base member 23 in the vertical direction are formed at both front and rear ends of the base member 23. The guide shaft 6 is inserted through the guide shaft insertion hole 24 (see FIG. 2). The base member 23 is supported so as to be movable in the vertical direction. Further, a locking block 26 having a rectangular frame shape in the left-right direction is attached to the lower surface of the base member 23. A pressing unit moving mechanism (not shown) is locked inside the locking block 26. The pressing unit moving mechanism is an air cylinder, for example, and can move the base member 23 supported by the guide shaft 6 so as to be movable in the vertical direction.

  On both sides of the base member 23 in the left-right direction, projecting plates 28 having a thickness in the front-rear direction are erected. The pair of projecting plates 28 extend in the left-right direction at the same position in the front-rear direction. The pair of protruding plates 28 are formed in a rectangular shape when viewed from the front-rear direction. Of the pair of projecting plates 28, a drive source 30 such as a motor is attached to the right projecting plate 28A. The drive source 30 is attached to the rear side of the right protruding plate 28A, and the output shaft 30a passes through the right protruding plate 28A and protrudes to the front side of the right protruding plate 28A.

  The drill bush support portion 32 is formed in a cylindrical shape. The drill bush support portion 32 is disposed on the upper surface of the base member 23 so as to protrude upward. The drill bush support portion 32 is integrally formed with a cylindrical portion 33 extending in the vertical direction and a pedestal portion 34 extending from the lower end portion of the cylindrical portion 33 toward the front and rear sides. The pedestal portion 34 is fixed to the upper surface of the base member 23 by fastening members 35 such as bolts at both the front and rear sides sandwiching the cylindrical portion 33. The drill bush support portion 32 is disposed such that a gap is formed between the rear end portion of the tubular portion 33 and the front surface of the protruding plate 28 in the front-rear direction.

5 is a cross-sectional view taken along line VV in FIG.
As shown in FIG. 5, the drill bush support cylinder 38 is formed in a cylindrical shape. The drill bush support cylinder 38 is airtightly fitted into the upper end opening of the drill bush support 32. The inner peripheral surface of the drill bushing support cylinder 38 is enlarged in diameter at the upper end portion with the stepped portion 38a interposed therebetween. A flange 38b extending outward is provided at the center of the drill bush support cylinder 38 in the vertical direction. The flange 38b is in contact with the upper edge of the drill bush support 32. As shown in FIG. 4, four slits 38 c cut downward are formed at equal intervals on the upper end edge of the drill bushing support cylinder 38. The position of the lower end edge of the slit 38c in the vertical direction substantially matches the stepped portion 38a. The drill bush support cylinder 38 is fixed to the cylinder part 33 by a screw 36 screwed into the cylinder part 33 of the drill bush support part 32 from the front.

The drill bush 40 is formed in a rectangular parallelepiped shape by glass epoxy or the like, for example, and is formed in a square shape when viewed in the vertical direction. The drill bush 40 is fitted into the upper end opening of the drill bush support cylinder 38. As shown in FIG. 5, the lower surface of the drill bush 40 is in contact with the stepped portion 38 a of the drill bush support cylinder 38.
The vertical dimension of the drill bush 40 is larger than the distance from the upper end edge of the drill bush support cylinder 38 to the stepped portion 38a. For this reason, the upper surface 40 a of the drill bush 40 protrudes from the upper end edge of the drill bush support cylinder 38. As shown in FIG. 4, the length of the diagonal line of the drill bush 40 is slightly larger than the inner diameter at the upper end of the drill bush support cylinder 38 when viewed in the vertical direction. The corners of the drill bush 40 when viewed in the vertical direction are engaged with the slits 38 c of the drill bush support cylinder 38. This prevents the drill bush 40 from falling off the drill bush support cylinder 38.

Further, as shown in FIG. 5, the length dimension of one side of the drill bush 40 is larger than the inner diameter at the lower part of the step part 38 a of the drill bush support cylinder 38 when viewed in the vertical direction. Thereby, the drill bush 40 airtightly closes the inside of the drill bush support cylinder 38 on the lower surface.
As shown in FIG. 2, the drill bush 40 is disposed to face the spindle portion 12. The drill bush 40 presses the workpiece W toward the spindle portion 12 when the workpiece W is drilled.

FIG. 6 is a plan view of the pressing unit.
As shown in FIG. 6, an L-shaped circular pipe member 42 is attached behind the left protruding plate 28 </ b> B in the base member 23. The circular pipe member 42 extends leftward from the left side surface of the base member 23 and is bent rearward. The rear end portion of the circular pipe member 42 is connected to an intake rod 8 such as a hose, for example, and the inside of the circular pipe member 42 is sucked by a pump (not shown).

  As shown in FIGS. 5 and 6, the base member 23 is formed with a communication hole 23 a that communicates the lower end opening of the drill bush support 32 and the opening on the base member 23 side of the circular pipe member 42. . The inside of the drill bush support portion 32 is set to a negative pressure by a pump or the like through the communication hole 23a, the circular pipe member 42, and the intake rod 8.

As shown in FIG. 3, the sheet holding unit 22 holds the sheet S (corresponding to “intervening member” in the claims). The sheet S is sandwiched between the drill bush 40 and the workpiece W when the workpiece W is drilled (see FIG. 2). The sheet S is a film formed in a band shape from a resin material such as PET (Polyethylene terephthalate). The thickness of the sheet S is, for example, about 100 μm.
The sheet holding unit 22 includes a base plate 45, a sheet storage reel 61 (corresponding to “second reel” in claims), a sheet collection reel 62 (corresponding to “first reel” in claims), and a guide member. 50.

  As shown in FIG. 4, the base plate 45 is formed in a plate shape having a thickness in the front-rear direction. The base plate 45 includes a right plate portion 45a attached to the front surface of the right protruding plate 28A, a left plate portion 45b attached to the front surface of the left protruding plate 28B, a right plate portion 45a, and a left plate portion 45b. And a connecting plate portion 45c for connecting the two. The right plate portion 45a, the left plate portion 45b, and the connecting plate portion 45c are integrally formed.

As shown in FIG. 3, the right plate portion 45a is formed in a rectangular shape that is substantially the same as the right protruding plate 28A in the front-rear direction. The right plate portion 45a is formed with a through hole 45d through which the pin 28a provided on the right protruding plate 28A is inserted. The right plate portion 45a is disposed along the front surface of the right protruding plate 28A.
The left plate portion 45b is formed in a rectangular shape that is substantially the same as the left protruding plate 28B when viewed in the front-rear direction. The left plate portion 45b is formed with a through hole 45e through which the pin 28b provided on the left protruding plate 28B is inserted. The left plate portion 45b is disposed along the front surface of the left protruding plate 28B.

  As shown in FIGS. 3 and 4, the connecting plate portion 45 c has a left end portion at the upper end edge of the right plate portion 45 a and a right end portion at the upper end edge of the left plate portion 45 b. It connects through the upper part of. The connecting plate portion 45 c is disposed on the rear side of the cylindrical portion 33 of the drill bush support portion 32.

  As shown in FIG. 3, the sheet storage reel 61 can be wound with a belt-like sheet S, and one end of the sheet S is connected thereto. An unused sheet S is wound around the sheet storage reel 61. The sheet storage reel 61 is detachably attached to the front surface of the left plate portion 45b. The sheet storage reel 61 is rotatably attached around an axis along the front-rear direction. The sheet storage reel 61 is arranged such that the center line in the width direction of the wound sheet S coincides with the center axis of the drill bush support cylinder 38. The sheet storage reel 61 is disposed on the opposite side of the spindle portion 12 (see FIG. 2) with the upper surface 40a of the drill bush 40 interposed therebetween.

  The shaft portion 64 that supports the sheet storage reel 61 is provided with resistance applying means 66 that applies a load to the rotation of the sheet storage reel 61. The resistance imparting means 66 is fitted to the shaft portion 64 so as to be in contact with the flange 61a on the front side of the sheet storage reel 61, and the ring member 67 is moved forward toward the flange 61a on the front side of the sheet storage reel 61. And an urging member (not shown) that presses backward from the rear. The sheet storage reel 61 is applied with a rotational load due to frictional resistance generated between the front flange portion 61 a and the ring member 67, and the sheet S pulled out from the sheet storage reel 61 is prevented from being slackened.

  The sheet collecting reel 62 can be wound with a belt-like sheet S, and the other end of the sheet S is connected thereto. A used sheet S is wound around the sheet collection reel 62. The sheet collection reel 62 is detachably attached to the front surface of the right plate portion 45a. The sheet collection reel 62 is rotatably mounted around an axis along the front-rear direction. Similar to the sheet storage reel 61, the sheet collection reel 62 is arranged such that the center line in the width direction of the wound sheet S coincides with the center axis of the drill bush support cylinder 38. Similarly to the sheet storage reel 61, the sheet collection reel 62 is disposed on the opposite side of the spindle portion 12 (see FIG. 2) with the upper surface 40a of the drill bush 40 interposed therebetween.

  The sheet collection reel 62 is detachably engaged with the output shaft 30a (see FIG. 4) of the drive source 30. The drive source 30 rotates the sheet collection reel 62 to pull out the sheet S wound around the sheet storage reel 61 and wind the sheet S pulled out from the sheet storage reel 61 onto the sheet collection reel 62.

  The guide member 50 is for introducing the belt-like sheet S suspended between the sheet storage reel 61 and the sheet collection reel 62 onto the upper surface 40 a of the drill bush 40. The guide member 50 is attached to the front surface of the connecting plate portion 45c (see FIG. 4). The guide member 50 includes a guide member 50 </ b> A disposed on the right side of the drill bush support portion 32 and a guide member 50 </ b> B disposed on the left side of the drill bush support portion 32. The right guide member 50 </ b> A and the left guide member 50 </ b> B are formed in plane symmetry with respect to an imaginary plane that is orthogonal to the left-right direction and passes through the central axis of the drill bush support cylinder 38. Therefore, in the following description, the right guide member 50A will be described, and portions corresponding to the right guide member 50A in the left guide member 50B will be denoted by the same reference numerals and description thereof will be omitted.

  The guide member 50A is an L-shaped member formed along the upper end edge of the drill bushing support cylinder 38 and the right end edge of the outer peripheral surface when viewed from the front-rear direction. The guide member 50A is gradually widened from the upper part toward the lower part when viewed from the front-rear direction. A concave guide groove 51 in which the sheet S travels is formed on the surface facing the right side of the guide member 50A. The guide groove 51 is formed from the lower right portion to the upper end portion of the guide member 50A. The guide groove 51 is open toward the drill bush support cylinder 38 at the upper end portion of the guide member 50A. The width of the guide groove 51 is slightly wider than the width of the sheet S. A roller 53 is disposed at the upper end of the guide member 50A. The roller 53 is disposed away from the bottom surface of the guide groove 51. The roller 53 is supported by the side wall portions on both sides in the front-rear direction of the guide groove 51 and is rotatable about an axis along the front-rear direction. 50 A of guide members are arrange | positioned so that the center line in the width direction of the guide groove 51 and the center axis line of the drill bush support cylinder 38 may correspond, seeing from the left-right direction.

  Here, as shown in FIGS. 3 and 4, the sheet holding unit 22 is detachably provided to the drill bush support unit 21 (drill bush 40). The sheet holding unit 22 is fixed to the drill bushing support unit 21 by a clip 9 that connects the left projecting plate 28B of the drill bushing support unit 21 and the left plate part 45b of the sheet holding unit 22. The sheet holding unit 22 moves integrally with the drill bush 40 when the drill bush support unit 21 moves in the vertical direction by a pressing unit moving mechanism (not shown).

  As shown in FIG. 5, the sheet S drawn from the sheet storage reel 61 travels through the guide groove 51 of the left guide member 50 </ b> B and passes between the guide groove 51 and the roller 53. Next, the sheet S travels while sliding in contact with the upper surface 40 a of the drill bush 40 while changing the traveling direction upward along the outer peripheral surface of the roller 53. The sheet S that has passed through the upper surface 40a of the drill bush 40 changes the traveling direction downward and passes between the guide groove 51 and the roller 53 of the right guide member 50A. Next, the sheet S travels through the guide groove 51 and is wound around the sheet collection reel 62. At this time, a load is applied to the sheet storage reel 61 against the rotation of the sheet storage reel 61 by the resistance applying unit 66 (see FIG. 4). For this reason, the tension acts on the sheet S pulled out from the sheet storage reel 61 to such an extent that it does not loosen.

Hereinafter, the operation of the present embodiment will be described.
First, the operation of the punching device 1 will be described. In addition, please refer to FIG. 2 to FIG. 6 for the reference numerals of each component in the following description. In the following description, a printed circuit board is taken as an example of the workpiece W.
When the drilling device 1 performs drilling of the workpiece W, first, the drill D is moved above a predetermined position with respect to the workpiece W by a workpiece moving mechanism and a gantry moving mechanism (not shown). At this time, the formation pattern of the circuit of the workpiece W may be imaged using an X-ray camera (not shown) or the like, and the position where the drilling process is performed may be accurately measured.

  Next, the spindle portion 12 is moved downward toward the workpiece W by a spindle movement mechanism (not shown), and the lower end portion of the pressing member 13 is brought into contact with the upper surface of the workpiece W. Further, the pressing unit 20 is moved upward toward the workpiece W by the pressing unit moving mechanism. At this time, the pressing unit 20 allows the drill bush 40 to pass through the slit 5 a formed in the work table 5 and extending in the left-right direction. The pressing unit 20 causes the upper surface 40 a of the drill bush 40 to abut the lower surface of the workpiece W via the sheet S. As described above, the workpiece W is sandwiched between the pressing member 13 and the drill bush 40 in the up-and-down direction, thereby preventing the displacement of the workpiece W and the bending of the workpiece W.

  Next, the spindle unit 12 is further moved toward the workpiece W. At this time, since the lower end portion of the pressing member 13 is in contact with the workpiece W, the spindle portion 12 further continues to descend while the pressing member 13 moves relative to the spindle portion 12 upward. Thereby, the drill D attached to the lower end of the spindle portion 12 protrudes downward from the drill hole 13a of the pressing member 13 and opens a hole in the workpiece W. At this time, when a new holding member 13 in which the drill hole 13a is not formed is used, the drill hole 13a is newly formed by the drill D.

  The drill D penetrating the workpiece W opens a hole in the drill bush 40 and the sheet S sandwiched between the drill bush 40 and the workpiece W. At this time, the workpiece W, the sheet S, and the cutting waste of the drill bush 40 generated by the drilling process are sucked by the drill bush support portion 32 having a negative pressure and sent to the outside through the communication hole 23 a and the circular pipe member 42. . In addition, when the drill bush 40 is already used, the drill D is inserted through the existing hole of the drill bush 40. Since the drill D is inserted into the hole formed in the drill bush 40 every time drilling is performed, the hole diameter of the hole of the drill bush 40 is expanded due to minute blurring of the drill D.

  According to the drilling device 1 of the present embodiment, since the sheet S is sandwiched between the drill bush 40 and the workpiece W when the workpiece W is drilled, the opening edge of the workpiece W on the drill bush 40 side (hereinafter, “ The lower end opening edge ”) can be covered with the sheet S. Thereby, when the drill D penetrates the workpiece W, the material constituting the workpiece W comes into contact with the sheet S and is pushed out from the lower end opening edge of the workpiece W into the gap between the hole of the drill bush 40 and the drill D. Can be prevented. Therefore, even when the hole diameter of the drill bush 40 expands to a predetermined size when the workpiece W is drilled, it is possible to suppress the occurrence of burrs at the lower end opening edge of the workpiece W without replacing the drill bush 40. Moreover, since the sheet S can be easily conveyed, the unused sheet S can be easily introduced between the drill bush 40 and the workpiece W. For this reason, generation | occurrence | production of a burr | flash can be suppressed easily compared with the case where the drill bush 40 is replaced | exchanged in order to suppress generation | occurrence | production of a burr | flash. Therefore, it can be set as the punching apparatus 1 which is excellent in manufacturing efficiency and can suppress generation | occurrence | production of a burr | flash.

  Further, since the sheet S is formed in a belt shape, the sheet S can be run between the drill bush 40 and the workpiece W. By moving the sheet S, the used portion of the sheet S is moved outward from between the drill bush 40 and the workpiece W, and the unused portion of the sheet S is interposed between the drill bush 40 and the workpiece W. Can be introduced and sandwiched. Therefore, an unused portion of the sheet S can be introduced between the drill bush 40 and the workpiece W without interrupting the drilling process, and a reduction in manufacturing efficiency can be suppressed.

  Further, the punching device 1 includes a sheet holding unit 22 that is detachable from the drill bush 40. For this reason, after using the sheet S wound around the sheet storage reel 61 and the sheet collection reel 62 (hereinafter referred to as “reel 61, 62”), the reels 61, 62 are replaced together with the sheet holding unit 22. can do. Therefore, the time for interrupting the drilling process can be shortened, and a decrease in manufacturing efficiency can be suppressed.

  Further, since the sheet holding unit 22 moves integrally with the drill bush 40, the sheet S can be prevented from being pulled out and loosened from the reels 61 and 62 as the drill bush 40 moves. For this reason, for example, it is possible to prevent a problem that the drill bush 40 cannot be properly pressed against the workpiece W by being sandwiched between the drill bush 40 and the workpiece W in a state where the sheet S is slack. Therefore, it is possible to precisely drill the workpiece W.

  In addition, the sheet collection reel 62 is rotated by the drive source 30 so that the sheet S wound around the sheet storage reel 61 is taken up by the sheet collection reel 62, so that it is positioned between the drill bush 40 and the workpiece W. The sheet S can be easily and automatically traveled. In addition, the punching device 1 includes resistance applying means 66 that applies a load to the rotation of the sheet storage reel 61. For this reason, when the sheet S is pulled out from the sheet storage reel 61 by the rotation of the sheet collection reel 62, the sheet storage reel 61 rotates more than necessary due to the inertial force, and is loosened by the sheet S pulled out from the sheet storage reel 61. Can be prevented. Therefore, the manufacturing efficiency is improved and the work W can be drilled precisely.

  Further, since the reels 61 and 62 are arranged on the side opposite to the spindle portion 12 with the upper surface 40a of the drill bush 40 interposed therebetween, the arrangement positions of the reels 61 and 62 should be considered in contact with the workpiece. It can be set without. For this reason, the sheet holding unit 22 can be reduced in size by, for example, arranging the reels 61 and 62 close to each other.

The present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within the technical scope thereof.
For example, in the above-described embodiment, the sheet S is formed in a band shape and is configured to travel between the drill bush 40 and the workpiece W, but is not limited thereto. For example, the sheet may be formed in a strip shape and appropriately supplied between the drill bush 40 and the workpiece W from a cassette or the like.

  Moreover, in the said embodiment, although the punching apparatus 1 pressed the upper surface of the workpiece | work W with the pressing member 13 at the time of punching of the workpiece | work W, it is not limited to this, The punching apparatus is provided with the pressing member. It does not have to be.

  Moreover, in the said embodiment, although PET was mentioned as an example as a material which forms the sheet | seat S, it is not limited to this. Examples of the material for forming the sheet S include polyethylene, polyamide, polyimide, polycarbonate, polypropylene, polyurethane, polyphenylene sulfide, polyether sulfone, polyether ether ketone, polyether imide, polytetrafluoroethylene, and aluminum vapor deposited film. Etc.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Hole punching device 12 ... Spindle part (drill holding | maintenance part) 22 ... Sheet | seat holding | maintenance unit (interposition member holding | maintenance unit) 30 ... Drive source 40 ... Drill bush (receiving member) 40a ... Upper surface of a drill bushing (drill holding part of a receiving member) Side surface) 61 ... Sheet receiving reel (second reel) 62 ... Sheet collection reel (first reel) 66 ... Resistance applying means D ... Drill S ... Sheet (intervening member) W ... Workpiece

Claims (6)

A drill that drills holes in the workpiece;
A drill holding portion for rotatably holding the drill;
A receiving member that is disposed to face the drill holding portion and presses the work toward the drill holding portion when the work is drilled;
A sheet-like interposition member sandwiched between the receiving member and the workpiece when drilling the workpiece; and
A drilling device comprising: The interposition member is formed in a band shape,
The perforating apparatus according to claim 1, wherein: A first reel to which the interposition member can be wound and to which one end of the interposition member is connected;
A second reel to which the interposition member can be wound and to which the other end of the interposition member is connected;
An interposition member holding unit having
The interposition member holding unit is provided detachably with respect to the receiving member.
The perforating apparatus according to claim 2, wherein: The interposition member holding unit moves integrally with the receiving member;
The perforating apparatus according to claim 3. A drive source for rotating the first reel and winding the interposition member wound around the second reel around the first reel;
Resistance applying means for applying a load to the rotation of the second reel;
Comprising
The drilling device according to claim 3 or 4, characterized by the above. The first reel and the second reel are disposed on the opposite side of the drill holding portion across the surface of the receiving member on the drill holding portion side,
The punching device according to any one of claims 3 to 5, wherein the punching device is provided.

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