JP2010221303A - Boring tool and boring device for forming opening of wiring box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a boring tool capable of easily exactly carrying out the positioning and the adjustment of an attitude by separating the positioning of the boring tool to a wall surface from the adjustment of the attitude of the boring tool and performing the adjustment of the attitude of the boring tool after performing the positioning of the boring tool, and to provide a boring device for forming an opening of a wiring box. <P>SOLUTION: The boring tool includes: an alignment part for carrying out alignment at a boring reference position of a wall material; and an engagement part engaged with the wall material to prevent the deflection of a boring blade when forming the through-hole. The alignment part is formed to project from the engagement part to enable alignment at the wall material earlier than at the engagement part. The engagement part is arranged to project from the boring blade to be engaged with the wall material before forming the through-hole S. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a punching device and a wiring box opening forming punching device.

  As described in Patent Document 1, a punching tool for drilling a hole in a wall surface or the like is known. The perforating tool is configured to perforate the through-hole S in the wall material by the cutting blade by driving the driving source and rotating the cutting blade with the front surface in contact with the wall surface. Yes.

JP 2002-103119 A

  In the punching tool described in Patent Document 1, the positioning of the punching tool and the tilting posture of the punching tool are stabilized by piercing the wall surface with a plurality of guide pins 20a and 21a. For this reason, after the guide pins 20a and 21a are pierced into the wall surface and the piercing tool is positioned, if the posture of the piercing tool is not preferable, the guide pins 20a and 21a are once pulled out of the wall surface. The same operation had to be repeated, and it was complicated and troublesome to accurately adjust the positioning of the drilling tool and the attitude of the tilting of the drilling tool at the same time.

  The present invention has been made in view of the problems of the background art described above, and an object of the present invention is to separate the positioning of the punching tool from the wall surface through which the through-hole is to be drilled and the adjustment of the posture of the punching tool. Provided is a punching tool and a wiring box opening forming drilling device that can adjust positioning and posture easily and accurately by adjusting the posture of the punching tool after positioning of the punching tool. There is.

The invention according to claim 1 is a drilling tool including a drilling blade for drilling a non-circular through hole in a wall material,
An alignment unit for aligning with the wall material perforation reference position;
An engagement portion that engages with the wall material to prevent the drilling blade from swinging when the through hole is formed,
The alignment portion is formed to protrude from the engagement portion so that the alignment portion can be aligned with the wall material prior to the engagement portion.

  According to a second aspect of the present invention, in the first aspect of the present invention, a contact portion that contacts the wall surface is provided, and the drilling blade is provided so as to be capable of moving forward and backward between a position retracted from the contact portion and a position protruding. Thus, the positioning portion is provided at a position protruding from the contact portion.

  According to a third aspect of the present invention, in the second aspect of the present invention, the engaging portion is provided at a position retracted from the abutting portion, and is provided so as to protrude from the abutting portion as the drilling blade advances. It is characterized by being.

  According to a fourth aspect of the present invention, in the piercing tool according to any one of the first to third aspects, the alignment portion is aligned with the center of the through hole to be drilled. Is.

According to a fifth aspect of the present invention, in the drilling tool according to the first to fourth aspects, the cover body covers the outer periphery of the drilling blade and abuts against the wall surface so that the front end surface surrounds the outer periphery of the through hole. And
At least one of the alignment portion and the contact portion is constituted by a front end surface of the cover body.

  According to a sixth aspect of the present invention, in the punching device according to any one of the first to fifth aspects, the alignment portion is provided so as to be retractable.

The invention according to claim 7 is a wiring box which has an opening on the front surface, is installed on the back of the wall, and the opening faces the wall surface by a non-circular through hole drilled from the wall surface to the wall material. When,
A drilling tool comprising a drilling blade for drilling the substantially elliptical through-hole,
The wiring box includes a detected part that can be detected from the wall surface in order to determine a reference for the drilling position of the through hole,
In the drilling tool, an alignment unit that aligns with a drilling reference position determined by the detected unit;
An engagement portion that engages with the wall material to prevent the drilling blade from swinging when the through hole is formed,
The alignment portion is formed to protrude from the engagement portion so that the alignment portion can be aligned with the wall material prior to the engagement portion.
The engaging portion is provided so as to protrude from the drilling blade so as to be engaged with the wall material before drilling the through hole.

According to an eighth aspect of the present invention, in the opening forming perforating apparatus for a wiring box according to the sixth aspect, the perforating tool includes an abutting portion that abuts against a wall surface.
The perforating blade is provided so as to be capable of moving forward and backward at a position retracted from the contact portion and a position protruding.
The alignment portion is provided at a position protruding from the contact portion.

  According to a ninth aspect of the present invention, in the opening forming perforating apparatus for the wiring box according to the eighth aspect, the engaging portion is provided at a position retracted from the abutting portion and can protrude from the abutting portion as the perforating blade advances. Is provided.

  According to a tenth aspect of the present invention, in the wiring box opening forming perforating apparatus according to any one of the seventh to ninth aspects, the alignment portion is provided at the center position of the through hole. It is what.

According to an eleventh aspect of the present invention, in the opening forming perforating apparatus for a wiring box according to any one of the seventh to tenth aspects, the outer periphery of the perforating blade is covered and a tip surface thereof is an outer periphery of the through hole. And a cover body that contacts the wall surface so as to surround
At least one of the alignment portion and the contact portion is constituted by a front end surface of the cover body.

  According to a twelfth aspect of the present invention, in the wiring box opening forming perforating apparatus according to any one of the seventh to eleventh aspects, a plurality of engaging portions are formed around the alignment portion. It is a feature.

  A thirteenth aspect of the present invention is the wiring box opening forming perforating apparatus according to any one of the seventh to twelfth aspects, wherein the alignment portion is provided so as to be retractable. It is.

  According to the first aspect of the invention, by aligning the alignment portion with the wall surface, the drilling tool is aligned with the drilling reference position of the wall material. Next, by engaging the engaging portion with the wall surface, the posture of the punching tool can be stabilized, and the punching blade is prevented from shaking during the drilling operation, so that the posture of the punching tool is stabilized. Next, the perforation blade is brought into contact with the wall surface to perforate the through hole. As described above, since the position of the punch can be adjusted after the position of the punch is adjusted, the positioning of the punch and the adjustment of the posture can be easily and accurately performed step by step.

  According to the second aspect of the present invention, by aligning the alignment portion with the drilling reference position, engaging the engagement portion with the wall material, and then bringing the contact portion into contact with the wall surface, the punching tool It is kept in a favorable posture without wobbling. For this reason, the perforating blade can perforate the wall material with the perforating tool maintained in a preferable posture.

  According to the third aspect of the present invention, after the alignment portion is aligned with the perforation reference position, the abutment portion is brought into contact with the wall surface, whereby the punching tool is maintained in a preferable posture without wobbling. For this reason, an engagement part can engage with a wall material in the state by which the punch was maintained in the preferable attitude | position.

  According to the fourth aspect of the present invention, by aligning the alignment portion with the center of the through hole to be drilled, the through hole can be drilled by a single drilling operation.

  According to the fifth aspect of the present invention, the perforation tool can be aligned with the perforation reference position of the wall material by bringing the front end surface of the cover body into contact with the wall surface, and the perforation tool has a preferable posture without wobbling. Kept.

  According to the sixth aspect of the present invention, since the alignment portion can be retracted, in the drilling operation, the punching tool is further pushed while the alignment portion is aligned with the reference drilling position. It is possible to perform the drilling work by bringing the wall close to the wall surface.

  According to the seventh aspect of the present invention, by aligning the alignment portion with the wall surface, the alignment portion is aligned with the perforation reference position of the wall material through which the opening of the wiring box faces the wall surface. By doing so, the drilling tool is aligned. Next, by engaging the engaging portion with the wall surface, the posture of the drilling tool can be stabilized, and vibration of the drilling blade can be prevented during the drilling operation. Next, the perforation blade is brought into contact with the wall surface to perforate the through hole.

  According to the eighth aspect of the present invention, by aligning the alignment portion with the drilling reference position, engaging the engagement portion with the wall material, and then bringing the contact portion into contact with the wall surface, the punching tool It is kept in a favorable posture without wobbling. For this reason, the perforating blade can perforate the wall material with the perforating tool maintained in a preferable posture.

  According to the ninth aspect of the present invention, after the alignment portion is aligned with the drilling reference position, the abutting portion is brought into contact with the wall surface, whereby the punching tool is maintained in a preferable posture without wobbling. For this reason, an engagement part can engage with a wall material in the state by which the punch was maintained in the preferable attitude | position.

  According to the tenth aspect of the present invention, by setting the center position of the wiring box to the drilling reference position, the through hole corresponding to the wiring box can be drilled by a single drilling operation.

  According to the eleventh aspect of the present invention, the perforation tool can be aligned with the perforation reference position of the wall material by bringing the front end surface of the cover body into contact with the wall surface, and the perforation tool has a preferable posture without wobbling. Kept.

  According to the twelfth aspect of the present invention, by providing a plurality of engaging portions, the punch can be maintained in a more stable posture.

  According to the thirteenth aspect of the present invention, since the alignment portion can be retracted, in the drilling operation, the punching tool is further pressed while the alignment portion is aligned with the reference drilling position. It is possible to perform the drilling work by bringing the wall close to the wall surface.

FIG. 1 is a perspective view of a punch. FIG. 2 is a longitudinal sectional view of the punch. 3 is a cross-sectional view taken along line EE in FIG. FIG. 4 is a diagram showing a state in which the two pulleys in FIG. 3 are brought close to each other. 5 is a cross-sectional view taken along line FF in FIG. FIG. 6 is a diagram of a state in which the punching tool is viewed from the tip side of the punching blade. FIG. 7 is a perspective view of the drilling blade. FIG. 8 is a bottom view of the drilling blade. FIG. 9 is a diagram showing a state in the middle of assembling the cover body to the punching tool main body. FIG. 10 is a diagram of FIG. 9 viewed from the direction indicated by the arrow R. FIG. 11 is a perspective view of an opening forming perforating apparatus for a wiring box. (Second Embodiment) FIG. 12 is a perspective view of an opening forming perforation apparatus for a wiring box. (Modification of the second embodiment) FIG. 13a is a perspective view of the punch. (Modification of the second embodiment) FIG. 13b is an enlarged view of the level. (Modification of the second embodiment) FIG. 14 is a diagram illustrating a positional relationship between the alignment portion, the contact portion, and the drilling blade. (Third embodiment) FIG. 15 is a diagram illustrating a positional relationship between the alignment portion, the contact portion, and the drilling blade. (Third embodiment) FIG. 16 is a diagram illustrating a positional relationship between the alignment portion, the contact portion, and the drilling blade. (Third embodiment) FIG. 17 is a diagram illustrating a positional relationship between the alignment portion, the contact portion, and the drilling blade. (Fourth embodiment) FIG. 18 is a diagram illustrating a positional relationship between the alignment portion, the contact portion, and the drilling blade. (Fourth embodiment) FIG. 19 is a diagram illustrating a positional relationship between the alignment portion, the contact portion, and the drilling blade. (Fourth embodiment) FIG. 20 is a perspective view of the pulley. (Fifth embodiment) FIG. 21 is a diagram showing a part of the pulley broken. (Fifth embodiment) FIG. 22 shows a state in which the tip side of the punching blade of the punching tool is viewed. (Sixth Embodiment)

  The punch 1 according to this embodiment is a tool for drilling a substantially elliptical through hole T in a wall material H. FIG. 1 shows a perspective view of the punch 1. FIG. 2 shows a longitudinal sectional view of the punch 1. As shown in FIG. 1, an electric drill 3 as a drive source is connected to the proximal end side of the rotary drive shaft 2 of the punch 1.

  As shown in FIG. 2, the punching tool 1 is aligned with the punching tool main body 4, the rotary drive shaft 2 provided so as to penetrate the punching tool main body 4, and the drilling reference position P of the wall material H. And the engaging portion 6 that engages with the wall material H by transmitting the rotation of the rotary drive shaft 2, and through the hole in the wall material H by transmitting the rotation of the rotary drive shaft 2. And a drilling blade 7 to be drilled.

  The rotary drive shaft 2 is provided so as to be movable in the axial direction. A state in which the rotary drive shaft 2 moves forward (in the direction of arrow A) is referred to as forward movement, and a state in which the rotational drive shaft 2 moves in the rear direction (in the direction of arrow B) is referred to as backward movement.

  The engaging portion 6 and the punching blade 7 are provided so as to be movable in the moving direction of the rotary drive shaft 2 together with the rotary drive shaft 2, while the positioning portion 5 is fixed to the punching tool body 4. ing.

  As shown in FIG. 1, the alignment portion 5 is aligned with the center position P of the through hole T to be drilled, and is composed of, for example, a member that is inserted into the surface of the wall material H. Or a member such as rubber pressed against the surface of the wall material H so as not to slide, or a member hooked on the wall material H. Here, the alignment refers to applying the alignment unit 5 to an arbitrary position on the wall surface desired by the operator, or applying the alignment unit 5 along a ruled line previously written on the wall surface. means.

  When the engaging part 6 is engaged with the wall material H, when the punch 1 is pressed against the wall surface of the wall H, the punch 1 is inclined in the direction of arrow C or D in FIG. In order to prevent the drilling tool 1 from swinging in the direction of arrow C or D in FIG. 1, in other words, in the direction opposite to the rotational direction of the drilling blade 7 during the drilling operation. Is positioned in a stable posture. As long as the engaging portion 6 can be engaged with the wall material H, the form and the like are not limited. For example, the engaging portion 6 is configured by a drill, and the drill is driven by the rotary drive shaft 2 to form a wall. The material H can be engaged.

  As shown in FIG. 2, the alignment portion 5 protrudes most forward, and then protrudes forward in the order of the engaging portion 6, the cover body 9, and the drilling blade 7. The alignment portion 5 is provided so as to be able to retract from the position shown in FIG.

  By being configured in this way, in the state where the positioning unit 5 is pressed against the wall material H indicated by the one-dot chain line in FIG. , The engaging portion 6 moves forward and is pressed against the wall material H as indicated by the alternate long and short dash line. At this time, the cover body 9 and the drilling blade 7 are still in contact with the wall material H. Not. Then, by driving the rotary drive shaft 2 and pushing the entire punch 1 forward, the engaging portion 6 engages with the wall material H, and then the front end surface of the cover body 9 contacts the cover body 9. Touch. Further, when the rotary drive shaft 2 is pushed toward the wall material H, the punching blade 7 comes into contact with the wall material H and the through hole T is formed in the wall material H.

  Hereinafter, a specific configuration will be described. As shown in FIG. 2, a rotation transmission portion 8 is connected to the distal end side of the rotation drive shaft 2, and a drilling blade 7 is attached to the rotation transmission portion 8, so that the rotational force of the electric drill 3 is rotationally driven. It is transmitted to the drilling blade 7 through the shaft 2 and the rotation transmitting portion 8, and the through hole T is formed in the wall material H by the drilling blade 7.

  The said punching tool main body 4 means the part by which the said rotational drive shaft 2, the cover body 9, etc. are supported. The punching tool main body 4 has the function and can be of any form, for example.

  The punching tool main body 4 is provided with a cover body attaching portion 10 at the distal end side, and a cover body 9 is detachably attached thereto, and a spring chamber 11 is provided inside, and penetrates the spring chamber 11 in the front-rear direction. Thus, a shaft through hole 12 is provided. The shaft through hole 12 is provided with a bearing 13, and the bearing 13 supports the rotary drive shaft 2 so as to be rotatable and movable in the front-rear direction. Further, a mechanism (not shown) for adjusting the amount of movement of the rotary drive shaft 2 in the front-rear direction is separately provided.

  A coiled compression spring 14 is provided in the spring chamber 11. One side of the spring chamber 11 is a spring seat 15, and the rotary drive shaft 2 is provided with a spring receiver. The compression spring 11 is provided between the spring seat 15 and the spring receiver, and always urges the rotary drive shaft 2 in the backward direction.

  Next, the rotation transmission unit 8 will be described. The rotation transmission unit 8 is a part that transmits the rotation of the rotary drive shaft 2 to the drilling blade 7. The rotation transmission unit 8 has the function, and the form thereof is not limited. For example, the rotation transmission part 8 may have the following form.

  A drive gear 16 is attached to the distal end side of the rotary drive shaft 2. A transmission gear 17 is provided adjacent to one side of the drive gear 16, and the movable portion 18 is provided on the other side of the drive gear 16. The drive gear 16 and the transmission gear 17 are engaged with each other.

  A first pulley 19 is provided so as to face the front surface of the transmission gear 17, and a second pulley 20 is provided so as to face the front surface of the movable portion 18.

  The proximal end side of the first chuck portion 21 is fixed to the conduction gear 17 so as to penetrate the center of the conduction gear 17, and the distal end side of the first chuck portion 21 penetrates the center of the first pulley 19. So that it is fixed. The base end of the engaging portion 6 is fixed to the first chuck portion 21.

  The proximal end side of the second chuck portion 22 is fixed to the movable portion 18 so as to penetrate the center of the movable portion 18, and the distal end side of the second chuck portion 22 penetrates the center of the second pulley 20. And fixed to the second pulley 20. The base end of the engaging portion 6 is fixed to the second chuck portion 22.

  The movable portion 18 is configured to be movable so as to approach or separate from the lateral direction with respect to the rotary drive shaft 2 by being tightened or loosened with a screw 23. FIG. 2 shows a state in which the movable portion 18 is separated from the rotary drive shaft 2. 3 and 4 are sectional views taken along line EE in FIG. 2. FIG. 3 shows a state in which the movable part 18 is separated from the rotary drive shaft 2, and FIG. Indicates a state in which the rotary drive shaft 2 is approached.

  Here, as shown in FIG. 4, when the movable portion 18 is close to the rotary drive shaft 2, both the pulleys 19, 20 and the drilling holes are drilled so that the drilling blade 7 can be attached to and detached from the first pulley 19 and the second pulley 20. When the gap S is provided between the blade 7 and the movable portion 18 is separated from the rotary drive shaft 2 as shown in FIG. 3, the drilling blade 5 is wound around the first pulley 19 and the second pulley 20. It is the state after being done, Comprising: The operating state of the punch 1 is shown.

  The drive gear 16, the transmission gear 17, and the movable part 18 are accommodated in a gear accommodating part.

  The aforementioned endless perforating blade 7 is detachably attached to the first pulley 19 and the second pulley 20.

  Two support rods 24 are erected on the cover body attaching portion 10 of the punching tool body 4, and an alignment holding portion 25 is fixed to the tip of the support rod 24 as shown in FIG. 2. The alignment holding part 25 is provided with a recess in the center of the front surface, and a through hole 26 penetrating in the front-rear direction at the bottom of the recess. In addition, two concave portions are provided on the back surface side of the alignment holding portion 25, and through holes 27 and 28 are provided at the bottoms of the respective concave portions. 6 protrudes forward.

  As shown in FIG. 5, the support rod 24 has a hexagonal cross section, and is fixed by being fitted into a hexagonal hole formed in the boss portion 29 of the punching tool body 4. FIG. 5 is a sectional view taken along line FF in FIG. The cross-sectional shape of the support bar 24 is made a square shape such as a hexagon, so that the rotation of the support bar 24 with respect to the punch body 4 is prevented, so that the alignment of the support bar 24 is adjusted. The holding part 25 is firmly fixed to the punching tool body 4. For this reason, even if the punching tool body 4 receives a rotational force in a direction opposite to the rotational direction of the punching blade 7, for example, a rotational force in the direction indicated by an arrow L in FIG. The cover body 9 does not approach the alignment holding part 25, and accordingly, the situation where the drilling blade 7 is sandwiched between the alignment holding part 25 and the cover body 9 can be prevented. Rotation can be secured. FIG. 6 shows a state in which the punch 1 is viewed from the arrow J direction in FIG.

  The alignment portion 5 has a protruding shape and has a pointed tip. The alignment portion 5 is provided so as to pass through the center of the coiled compression spring 30 in the axial direction of the compression spring 30. One end of the compression spring 30 abuts against a spring seat around the through hole 26, and the other end abuts against a spring receiver 31 provided on the distal end side of the alignment portion 5, thereby the alignment portion. 5 is always urged so as to protrude forward.

  The perforating blade 7 is a blade for perforating a substantially elliptical through hole in the wall material H, and the form thereof is not limited, but can be, for example, the following form.

  As shown in FIGS. 7 and 8, the drilling blade 7 includes an endless belt-like blade body 32 and an endless belt-like timing belt 33. FIG. 7 shows a perspective view of the punching blade 7, and FIG. 8 shows a state in which the punching blade 7 is viewed from the arrow K direction in FIG. When the blade body 32 is made of, for example, stainless steel having a spring property, the blade body 32 has a cylindrical shape in a natural state.

  The blade body 32 is connected to the other end side of the blade body 32 in the circumferential direction so as to connect the timing belt 33 with a plurality of blade bodies 34 formed on one end side of the blade body 32. A plurality of connecting portions 35 are provided that are open and project from the other end toward the timing belt 33. As shown in FIG. 8, the timing belt 33 includes a plurality of hole-like insertion portions 33 a through which the connection portions 35 are inserted, and the connection portions 35 are inserted into the insertion portions 33 a so that the blade body 32 and the timing belt 33 are inserted. 33 is connected. The connecting portion 35 is attached to the blade body 32 by spot welding, rivets or the like.

  As shown in FIG. 2, the cover body 9 is attached to the cover body attaching portion 10 of the punching tool body 4. The cover body 9 is provided so as to surround the rotation transmission portion 8 and the lateral outer periphery of the drilling blade 7. As shown in FIGS. 9 and 10, the cover body 9 includes a cover body 36 on the base end side and divided bodies 37 and 37 provided on the distal end side of the cover body 36. FIG. 10 shows the state of FIG. 9 viewed from the direction indicated by the arrow R.

  As shown in FIG. 9, the cover body 36 is provided with a hook receiving portion 39 that is hooked on a hook portion 38 provided in the cover body mounting portion 10.

  The divided bodies 37 and 37 are formed by dividing the front end side of the cover body 9 into two in the lateral direction with respect to the installation direction of the rotary drive shaft 2. One side of both divided bodies 37, 37 is connected to each other by a hinge 40 provided on the cover body 36, the other side is a free end that can be opened and closed, and the free ends can be connected to each other by a screw 41. It has become. Further, the cover body 9 is provided with a chip receiver 42 so that chips can be collected.

  In FIG. 1, reference numeral 43 denotes a level, which is used when adjusting the posture of the punch 1 to an appropriate posture. As shown in FIG. 1, the level 43 is provided on the outer surface of the cover body 9. Here, the outer surface of the cover body 9 includes two arc surfaces 44 and two flat surfaces 45, and the level 43 is provided on the outer surface of the arc surface 44 and the outer surface of the flat surface 45. The level 43 includes a base 43a, a rotating disk 43b rotatably provided on the base 43a, and a scale part 46 attached to the rotating disk 43b. Has a configuration in which bubbles are confined. Then, the scale portion 46 is made parallel to the wall surface of the wall material H, and the rotary plate 43b of the level 43 is rotated so that the scale portion 46 is perpendicular to the wall surface of the wall material H, thereby drilling. It is used when adjusting the posture of the tool 1. That is, as shown in FIG. 1, when the vertically long through hole T is drilled, the scale part 46 of the level 43 is made parallel to the wall surface so that the bubble is positioned at the center of the scale part 46. The position of the tool 1 is adjusted, and then the rotating plate 43b of the level 43 is rotated so that the air bubble is positioned at the center of the scale part 46 with the scale part 46 perpendicular to the wall surface. By adjusting the posture of 1, the rotary drive shaft 2 of the drilling tool 1 is perpendicular to the wall surface, and the entire drilling blade 7 can be in contact with the wall material H evenly.

  Next, a process of assembling the cover body 9 to the punching tool body 4 will be described with reference to FIGS. 9, 10, and 6. FIG. As shown in FIG. 9, with the two divided bodies 37, 37 open, the cover body 9 is brought close to the drilling blade 7, and the hook receiving portion 39 of the cover body 9 is attached to the hooking portion 38 of the punching tool body 4. Hook.

  In this state, as shown in FIG. 10, the drilling blade 7 meshes with the two pulleys 19 and 20, while the drilling blade 7 has a spring property and has a cylindrical shape. Therefore, the front end side of the drilling blade 7 where the drilling blade 7 does not mesh with the pulleys 19 and 20 is curved so as to protrude sideways.

  Next, the divided bodies 37 of the cover body 9 are brought close to each other in the direction of arrow N in FIG. This state is shown in FIG. As shown in FIG. 6, the portion of the drilling blade 7 that is curved without meshing with the pulleys 19 and 20 is pressed from the side by the divided bodies 37 and 37, as shown in FIG. In order to be corrected to a substantially straight line, the entire shape of the drilling blade 7 is substantially elliptical, and a substantially elliptical through hole T can be formed in the wall material H as shown in FIG. Is.

  Next, with reference to FIG. 1, the operation when the substantially elliptical through hole T is formed in the wall material H will be described. The through hole T is a hole for attaching a wiring box, a wiring device, or the like. As shown in FIG. 1, the punch 1 is made to face the wall material H. Next, the alignment part 5 of the punch 1 is aligned with the drilling reference position P of the wall material H. Here, the perforation reference position P is specified by a ruled line on the wall surface in advance.

  In this state, when the entire punch 1 is pushed forward, as shown in FIG. 2, the alignment portion 7 moves backward against the spring force of the compression spring 30, so that the engaging portion 6 is As indicated by the alternate long and short dash line, it hits the surface of the wall material H.

  At this time, as shown in FIG. 1, when the vertically long through hole T is drilled, as shown in FIG. 2, the level is set with the tip of the alignment portion 5 being brought into contact with the drilling reference position at one point. By rotating the rotating plate 43b of 43, the scale portion 46 is made parallel to the wall material H, and the posture of the punch 1 is adjusted so that the bubble is positioned at the center of the scale portion 46. Next, the position of the punch 1 is adjusted so that the bubble is positioned at the center of the scale portion 46 with the scale portion 46 being perpendicular to the wall material H by rotating the rotating plate 43b of the level 43. Thus, the rotary drive shaft 2 is perpendicular to the surface of the wall material H so that both the upper side and the lower side of the drilling blade 7 can uniformly contact the wall surface. Can touch the wall evenly.

  In this state, the electric drill 3 is operated to rotate the engaging portion 6, and the rotary drive shaft 2 is advanced toward the wall material H to cause the engaging portion 6 to bite into the wall material H. As the engaging portion 6 bites into the wall material H, the punching tool 1 moves in the direction of arrow C or D in FIG. 1, in other words, without swinging in the direction opposite to the rotation direction of the punching blade 7. Posture is stable.

  Further, when the rotary drive shaft 2 is advanced toward the wall material H, the tip surface of the cover body 9 abuts against the wall material H, so that the punch 1 is in the directions indicated by arrows P and Q in FIG. The posture of the punch 1 is stabilized without wobbling.

  Further, when the rotary drive shaft 2 is advanced toward the wall material H, the perforating blade 7 forms a through hole T in the wall material H.

  Thus, first, the positioning unit 5 is pressed against the wall surface of the wall material H, so that the drilling tool 1 can be positioned at the drilling reference position P on the wall surface. It can be carried out.

  Then, after the positioning of the punching tool 1 is reliably performed in this way, the posture of the punching tool 1 can be easily and accurately maintained in a good posture by causing the engaging portion 6 to bite into the wall surface.

  Thereafter, the tip surface of the cover body 9 abuts against the wall surface, so that the punch 1 is prevented from wobbling and the posture of the punch 1 is stabilized.

  As described above, after the positioning of the punching tool 1 is reliably performed, the engaging portion 6 is bitten into the wall surface so that the posture of the punching tool 1 is easily and accurately maintained in a good posture. 1 positioning work and the posture adjustment of the punch 1 can be accurately performed step by step.

  In the first embodiment, the tip surface of the cover body 9 functions as an abutting portion that abuts against the wall material H, thereby preventing the piercing tool 1 from wobbling and stabilizing the posture of the piercing tool 1. It can be done. By attaching a seal member 9b made of a non-slip material to the tip of the cover body 9, the tip of the cover body can come into contact with the wall material in a non-slip state, and the punching tool is placed on the wall surface in a stable posture. Can abut.

  FIG. 11 shows a second embodiment. As shown in FIG. 11, the punch 1 has a position corresponding to the opening 101 so that the opening 101 of the opening of the wiring box 100 provided on the back surface side of the wall material H is exposed to the front surface side of the wall material H. It can be used when the through hole T is drilled. The wiring box 100 and the punching tool 1 constitute an opening forming punching device 200 for the wiring box 100.

  In order to determine a reference for the drilling position of the through hole T, a center of the wiring box 100 is provided with a detected portion 102 that can be detected from the wall surface. The detected portion 102 is configured by a magnet or the like, for example, and the position of the detected portion 102 can be detected magnetically from the surface side of the wall material H.

  The operation itself of making the substantially elliptical through hole T in the wall material H is the same as that in the first embodiment, and the description thereof is omitted.

  Here, if it is known in advance that the direction of the opening 101 of the wiring box 100 provided on the back side of the wall material H is vertically long or horizontally long, it depends on the direction of the opening 101 of the wiring box 100. Drill through holes. However, when the orientation of the opening of the wiring box 100 provided on the back side of the wall material H is unknown, a small hole is formed in the wall material H so that the tip of the detected portion 102 is attached to the surface of the wall material H. Exposed to the side. Since the arrow Y for displaying that the opening 101 of the wiring box 100 is vertically long or horizontally long is displayed at the tip of the detected portion 102, the opening 101 of the wiring box 100 is placed on the surface of the wall material H. Before the through hole for exposing to the hole is formed, the small hole can be formed and the direction of the arrow Y can be visually observed. Since the arrow Y shown in FIG. 11 is displayed upward, it indicates that the opening 101 is vertically long. And the said alignment part 5 can be made into the structure hooked on the said small hole.

  In the above description, the case where the vertically long through holes are formed in the wall material H has been described. However, as shown in FIG. 12, the opening of the wiring box 100 is horizontally long and the wall material H has a horizontally long transparent hole. When the hole is to be drilled, the punch 1 is tilted sideways and the posture of the punch 1 is appropriately adjusted using the level 43 attached to the flat surface 45 of the cover body 9. By doing so, a horizontally long through hole can be formed in the wall material H. Since the way to use the level 43 is the same as described above, the description is omitted.

  Moreover, in the above description, although the level 43 was attached to both the arc surface 44 and the flat surface 45 of the cover body 9, the case where the longitudinally and laterally long through-hole was drilled in the wall material H was demonstrated. As shown in FIG. 13, only one level 71 is provided in the cover body 9, and it is possible to cope with the case where the wall material H is provided with vertically and horizontally long through holes. Here, the cover body 9 is composed of a cylindrical peripheral surface 72 and a bottom surface 73, the side facing the bottom surface 73 is opened in a substantially elliptical shape, and the tip side of the drilling blade 7 is formed in a substantially elliptical shape from the opening. It is in an exposed form.

  As shown in FIG. 13, when the level 71 is provided on the bottom surface 73 of the cover body 9, when the vertically long through hole T is drilled in the wall material H, as shown in FIG. In a state where the drilling blade 1 is vertically long and the drilling tool 1 faces the wall surface, the scale part 74 containing the bubble V of the level 71 is leveled, and the bubble is positioned at the center position of the scale part 74. Thus, by adjusting the posture of the punch 1, the vertically long through hole T can be accurately drilled.

  Further, in the case where a horizontally long through hole is drilled in the wall material H, the level of the level 71 is adjusted with the punch 1 facing the wall surface in a posture where the drilling blade of the cover body 9 of the punch 1 is horizontally long. By horizontally adjusting the position of the perforating tool 1 so that the scale portion 74 containing the bubble V is horizontal and the bubble V is located at the center position of the scale portion 74, the horizontally long through hole T is accurately drilled. Can be set.

  Thus, with one level 71, a vertically long hole and a horizontally long hole can be accurately drilled.

  14 to 16 show a third embodiment. In the third embodiment, the positioning holding portion 25 of the first embodiment is caused to function as the contact portion 51, so that the positional relationship among the corresponding contact portion 51, the alignment portion 5, the engagement portion 6, and the drilling blade 7 is obtained. It has characteristics. In the drawing, elements other than the contact portion 51, the alignment portion 5, the engagement portion 6, and the drilling blade 7 are omitted.

  The abutting portion 51 is fixed to the tips of the two support rods 24 erected on the cover body mounting portion 10 of the punching tool body 4 and is recessed at the center of the front surface, like the positioning portion 5. A through-hole 26 penetrating in the front-rear direction is provided at the bottom of the concave portion so that the alignment portion 7 can be projected and retracted, and further, two concave portions are provided on the back surface side, Through holes 27 and 28 are provided in the bottom so that the engaging portions 6 and 6 can protrude forward, as in the first embodiment, but the front surface of the contact portion 51 is It becomes a flat contact surface 52 and can come into contact with the wall surface of the wall material H.

  Next, the positional relationship among the contact portion 51, the alignment portion 5, the engagement portion 6, and the drilling blade 7 will be described. In a state where the rotary drive shaft 2 is not moved forward, as shown in FIG. 14, the alignment portion 5, the contact surface 52 of the contact portion 51, the engagement portion 6, and the punching blade 7 protrude forward. For this reason, in the drilling operation, first, as shown in FIG. 14, the positioning unit 5 is pressed against the wall material H to position the drilling tool 1.

  Next, by moving the entire punch 1 toward the wall material H, the contact surface 52 of the contact portion 51 contacts the wall material H while the alignment portion 5 moves backward as shown in FIG. By touching, the punch 1 does not wobble and the posture is stabilized.

  Then, when the entire punch 1 is advanced, the rotary drive shaft is rotated with an electric drill in a state where the engaging portion 6 is in contact with the wall material H, and the rotary drive shaft is advanced, as shown in FIG. When the engaging portion 6 engages with the wall material H, the drilling blade 7 is pressed against the wall surface in a stable posture without swinging in the opposite direction to the rotation direction of the drilling blade 7, and a through hole is formed. .

  In the third embodiment, before the engaging portion 6 is pressed against the wall surface, the contact portion 51 contacts the wall surface so that the rotary drive shaft 2 of the punch 1 is perpendicular to the wall surface. In order to prevent the punch 1 from wobbling, the punch 1 can be punched in a more stable posture.

  17 to 19 show a fourth embodiment. The feature of the fourth embodiment is that the contact portion 51 and the alignment portion 5 of the third embodiment are omitted, and the front end surface of the cover body 9 functions as the contact portion and the alignment portion.

  Next, the positional relationship between the front end surface of the cover body 9, the engaging portion 6, and the drilling blade 7 will be described. In a state where the rotary drive shaft 2 is not moved forward, as shown in FIG. 17, the front end surface of the cover body 9, the engaging portion 6, and the drilling blade 7 protrude forward. For this reason, in the drilling operation, first, as shown in FIG. 17, the tip surface of the cover body 9 is pressed against the wall material H to align the punch tool 1, and at the same time, the tip surface of the cover body 9. Is pressed against the wall material H, the posture of the punch 1 is stabilized without wobbling.

  Next, when the rotary drive shaft is advanced toward the wall member H, the engaging portion 6 approaches the wall member H as shown in FIG. Then, when the rotary drive shaft is rotationally driven by an electric drill and the rotary drive shaft is further advanced, as shown in FIG. 19, the engaging portion 6 is engaged with the wall material H, so that the drilling blade 7 is The perforation blade 7 is pressed against the wall surface in a stable posture without swinging in the direction opposite to the rotation direction of the perforation blade 7 and a through hole is formed.

  In the fourth embodiment, a shape corresponding to the through hole T to be drilled in the wall material H is previously marked on the surface of the wall material H, and the cover body of the punch 1 is matched with the ruled mark. It is suitable for the case where the punching tool 1 is positioned by aligning the tip end surfaces of 9. In the fourth embodiment, like the cover body of the first embodiment, by providing an anti-slip member on the front end surface of the cover body 9, the cover body functions as a positioning portion and a contact portion. improves.

  20 and 21 show a fifth embodiment. FIG. 20 is a perspective view of the pulley 19, and FIG. In the pulley 19 of the fifth embodiment, as shown in FIG. 21, a plurality of pulley teeth 62 that mesh with the concave and convex teeth 61 of the timing belt 33 are provided on the outer periphery, and a flange 63 is formed on the front side. I am doing. As shown in FIG. 21, a chip discharge groove 64 is deeply drilled between the pulley teeth 62 toward the center of the pulley 19, and the chip discharge groove 64 gradually moves toward the flange 63 side. Further, a chip discharge hole 65 communicating with the chip discharge groove 64 is formed on the front side of the pulley 19. By the chip discharge groove 64 and the chip discharge hole 65 formed in this way, the chip is discharged out of the pulley 19 without being clogged between the pulley teeth 62.

  FIG. 22 shows a sixth embodiment. The feature of this sixth embodiment is that four pulleys 81, 82, 83, 84 are provided so as to be located at the corners of the rectangle, and a punching blade 85 is passed over these four pulleys 81, 82, 83, 84, One of the pulleys is used as a driving pulley, and the remaining three pulleys are driven pulleys, so that the present invention is applied to a drilling tool for drilling a substantially rectangular through hole.

  In the sixth embodiment, a rectangular through hole can be formed in the wall material.

  In the above description, the case where the two engaging portions 6 are provided has been described, but one may be provided, or three or more may be provided so as to surround the alignment portion.

  The present invention is used for manufacturing and using a punching device and an opening forming punching device for a wiring box.

DESCRIPTION OF SYMBOLS 1 Drilling tool 2 Rotation drive shaft 3 Electric drill 4 Drilling tool main body 5 Positioning part 6 Engaging part 7 Drilling blade 9 Cover body (positioning part, contact part)
25 Alignment holding part (contact part)

Claims (13)

A drilling tool comprising a drilling blade for drilling a non-circular through hole in a wall material,
An alignment unit for aligning with the wall material perforation reference position;
An engagement portion that engages with the wall material to prevent the drilling blade from swinging when the through hole is formed,
The alignment portion is formed to protrude from the engagement portion so that the alignment portion can be aligned with the wall material prior to the engagement portion.
The punching tool is characterized in that the engaging portion is provided so as to protrude from the punching blade so as to engage with the wall material before drilling the through hole. A contact portion that contacts the wall surface;
The perforating blade is provided so as to be capable of moving forward and backward at a position retracted from the contact portion and a position protruding.
The punching device according to claim 1, wherein the alignment portion is provided at a position protruding from the contact portion.   The punching tool according to claim 2, wherein the engaging portion is provided at a position retracted from the contact portion, and is provided so as to protrude from the contact portion as the drilling blade advances.   The punch according to any one of claims 1 to 3, wherein the alignment portion is aligned with a center of a through hole to be drilled. A cover body that covers the outer periphery of the perforating blade and abuts against the wall surface so that the front end surface surrounds the outer periphery of the through hole;
The punching device according to any one of claims 1 to 4, wherein at least one of the alignment portion and the contact portion is configured by a tip surface of the cover body.   The punch according to any one of claims 1 to 5, wherein the alignment portion is provided so as to be retractable. A wiring box that has an opening on the front surface, is installed on the back of the wall, and the opening faces the wall surface by a non-circular through hole drilled in the wall material from the wall surface;
A drilling tool comprising a drilling blade for drilling the substantially elliptical through-hole,
The wiring box includes a detected part that can be detected from the wall surface in order to determine a reference for the drilling position of the through hole,
In the drilling tool, an alignment unit that aligns with a drilling reference position determined by the detected unit;
An engagement portion that engages with the wall material to prevent the drilling blade from swinging when the through hole is formed,
The alignment portion is formed to protrude from the engagement portion so that the alignment portion can be aligned with the wall material prior to the engagement portion.
A wiring box opening forming perforating apparatus, wherein the engaging portion is provided so as to protrude from a perforating blade so as to engage with a wall material before perforating the through hole. The punch is provided with a contact portion that contacts a wall surface,
The perforating blade is provided so as to be capable of moving forward and backward at a position retracted from the contact portion and a position protruding.
The said position alignment part is provided in the position protruded from the said contact part, The opening formation perforation apparatus of the wiring box of Claim 7 characterized by the above-mentioned.   The punching tool according to claim 8, wherein the engaging portion is provided at a position retracted from the contact portion, and is provided so as to protrude from the contact portion as the drilling blade advances.   The said to-be-detected part is provided in the center position of a wiring box, and the said position alignment part is provided in the center position of the through-hole, The any one of Claim 7 thru | or 9 characterized by the above-mentioned. Opening punching device for wiring box. A cover body that covers the outer periphery of the drilling blade and abuts against the wall surface so that the front end surface surrounds the outer periphery of the through hole;
11. The wiring box opening formation according to claim 7, wherein at least one of the alignment portion and the abutting portion is configured by a front end surface of the cover body. Drilling device.   12. The opening forming perforating apparatus for a wiring box according to claim 7, wherein a plurality of the engaging parts are formed around the alignment part.   13. The opening forming perforation device for a wiring box according to claim 7, wherein the alignment portion is provided so as to be retractable.

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