JP6944788B2 - Drilling jig and drilling method using the drilling jig - Google Patents

Description

The present invention relates to a drilling jig for drilling a hole in a resin member whose surface is coated, for example, a bumper of a vehicle, and a drilling method using the drilling jig.

When the vehicle approaches a surrounding obstacle while driving, the ultrasonic sensor attached to the bumper of the vehicle detects the approach to the obstacle and issues a warning such as a buzzer to the driver. An ultrasonic sensing system is used to notify the approach of. When this ultrasonic sensor is retrofitted to the bumper of a vehicle, it is necessary to make a hole in the bumper for arranging the sensor microphone portion of the ultrasonic sensor.

In such a case, conventionally, the bumper is cut with a rotary tool such as a drill or a hole saw to make a hole. However, paint is applied to the surface of the bumper, and when these rotary tools are used, there is a problem that the paint is torn off by the rotational force of the rotary tool and the appearance is significantly impaired. In addition, when these rotary tools are used, burrs are generated at the opening edge of the hole, so it is necessary to file them to remove the burrs, which complicates the work and paints with a file. There was also the problem of being scraped.

As a drilling method that does not use a rotary tool as described above, Patent Document 1 describes a hole drilling tool for drilling a stepped hole. This hole drilling tool has a configuration in which a resin substrate, which is an object to be drilled, is sandwiched between a fixed blade receiving portion and a movable blade portion, and then punched out to cut the hole.

Further, Patent Document 2 describes a press working method in which a bumper is punched by a punch, and a burr generated on the upper surface of the bumper during the punching is pressed by a pressing surface of the punch to crush it.

Japanese Patent No. 4969511 Japanese Unexamined Patent Publication No. 2009-202272

The hole drilling tool described in Patent Document 1 is for drilling a hole by so-called shearing, but the hole to be drilled is a stepped hole, and a deformation of a shape other than the drilling of a hole in the object to be drilled. Therefore, when the coating is applied to the surface of the object to be drilled, there is a risk that the coating may peel off due to the shape deformation. Moreover, it could not be used for drilling a hole without a step.

Further, in the press working method described in Patent Document 2, the surface of the bumper is once burred so as to protrude upward, and then the burrs are pressed downward to crush the burrs. A load is applied to the opening edge by applying force up and down. When the paint is applied to the surface of the bumper, this load may cause the paint to be cut or peeled off at an unintended position.

Therefore, the present invention solves the above problems, and even when the coating is applied to the object to be drilled, the boundary between the base material of the object to be drilled and the coating is conspicuous at the opening edge of the punched hole. It is an object of the present invention to provide a drilling jig which is difficult and does not significantly impair the appearance, and a drilling method using the drilling jig.

The drilling tool according to the invention according to claim 1 is configured to have a male blade, a female blade, and a shaft member, and the male blade and the shaft member can be connected to the male blade. Is formed with a shaft connecting hole through which the shaft member is inserted , a blade portion, and a tool locking portion for locking a manual tool, and the blade portion evenly cuts the coating applied to one side surface of the object to be drilled. It has a flat blade surface to be sheared, and the female blade is formed with a shaft insertion hole through which the shaft member is inserted and a blade storage hole capable of accommodating the blade portion. A part of the coating is cut, and the shaft member is rotated while fixing the male blade so as not to rotate so that the male blade and the female blade come close to each other and punch out the object to be drilled. ..

In the drilling jig according to the invention of claim 2, the male blade and the shaft member have the shaft member inserted into the shaft connecting hole, and the female screw portion and the shaft member formed in the male blade have the same shaft member. It is characterized in that the formed male screw portions can be connected by screwing.

Drilling jig according to the invention of claim 3, wherein the shaft member is hexagonal socket bolt or hexagon bolt or head is hexagonal columnar hexagon socket head bolts.

The drilling jig according to the invention according to claim 4 is characterized in that the shaft member has a guide portion, and the guide portion can be inserted into the shaft insertion hole.

The drilling jig according to the invention according to claim 5 has a shaft portion and a head portion to which the shaft member can be attached and detached, and a rotation that regulates rotation so that the shaft portion does not rotate in the shaft insertion hole. It is characterized by being provided with a preventive member.

Drilling jig according to the invention of claim 6, the urging means provided on the female blade, wherein the biasing means is characterized by biased away the female blade from the object to be drilled body ..

Drilling method according to the invention of claim 7, bored a temporary hole for inserting the shaft member said to be drilled body painted on one side, the shaft member which is inserted into the shaft insertion hole The female blade is inserted into the temporary hole from the other side surface side of the object to be drilled, the female blade is brought into contact with the body to be drilled, the male blade and the shaft member are connected, and the blade surface is mounted on the blade surface. The male blade is brought into contact with the one side surface of the body, the object to be drilled is sandwiched between the male blade and the female blade, and the male blade is rotated around the shaft member while fixing the shaft member so as not to rotate. The male blade is brought close to the female blade, a part of the coating is cut by the blade portion, and the shaft member is rotated while fixing the male blade so as not to rotate, so that the male blade and the female blade are brought close to each other. It is characterized by punching out the object to be drilled.

Drilling method according to the invention of claim 8, drilled a temporary hole for inserting the shaft member said to be drilled body painted on one side, the shaft member which is inserted into the shaft insertion hole The female blade is inserted into the temporary hole from the other side surface side of the object to be drilled, the female blade is brought into contact with the body to be drilled, the male blade and the shaft member are connected, and the male blade is mounted. The male blade is brought into contact with the one side surface of the body, the object to be drilled is sandwiched between the male blade and the female blade, and the male blade is rotated around the shaft member while fixing the shaft member so as not to rotate. The male blade is brought close to the female blade, a part of the coating is cut by the blade portion, and the head portion is rotated around the shaft portion while fixing the male blade and the shaft portion so as not to rotate. It is characterized in that the blade and the female blade are brought close to each other to punch out the object to be drilled.

According to the first aspect of the present invention, a punched hole can be formed in the object to be pierced after cutting a part of the coating of the object to be pierced in which the coating is applied to one side surface. Further, a tool such as a spanner or a wrench can be locked to the male blade to fix and rotate the male blade.

According to the second aspect of the present invention, the male blade and the shaft member can be screwed together, and the moving distance of the male blade can be adjusted by the rotation amount of the male blade and the screw pitch.

According to the invention described in claim 3, it can be fixed and rotating the shaft member engages a tool such as a spanner or wrench on the shaft member.

According to the invention of claim 4, it is possible to reduce the rattling of the shaft member when the shaft member is inserted into the female blade.

According to the invention of claim 5, the shaft member can be inserted into the shaft insertion hole from both directions of the female blade.

According to the invention of claim 6, the drilling jig can be easily recovered after drilling the punched hole.

According to the invention of claim 7, it is possible to make a punched hole in which the boundary between the base material of the object to be drilled and the coating is inconspicuous at the opening edge of the punched hole.

According to the eighth aspect of the present invention, it is possible to pierce the punched hole at the opening edge of the punched hole so that the boundary between the base material of the object to be pierced and the coating material is inconspicuous.

It is an exploded view of the drilling jig which shows Example 1 of this invention. The same is a perspective view of a male blade. The same is a plan view of the male blade. The same is the left side view of the male blade. The same is the right side view of the male blade. The same is a vertical cross-sectional view of the male blade. The same is the left side view of the female blade. The same is the right side view of the female blade. The same is a left side view of the metal washer. The same is the left side view of the resin washer. It is the cross-sectional view of the bumper coated with the same. The same is a cross-sectional view of a bumper having a temporary hole. The same is a cross-sectional view of the drilling jig and the bumper in the state where the drilling jig is set. The same is a cross-sectional view of a drilling jig and a bumper in a state where a predetermined amount of paint has been cut. The same is a cross-sectional view of a drilling jig and a bumper in a state where the bumper is being punched out. It is a cross-sectional view of a drilling jig and a bumper in a state where the bumper is punched out. It is a vertical sectional view of the drilling jig which shows Example 2 of this invention. The same is a cross-sectional view taken along the line AA of the drilling jig. The same is a cross-sectional view taken along the line BB of the drilling jig. It is a vertical sectional view of the drilling jig which shows Example 3 of this invention. The same is a partial perspective view of the drilling jig. The same is a cross-sectional view taken along the line CC of the drilling jig. It is sectional drawing of the drilling jig and the bumper in the state which cut the coating | coating which shows Example 4 of this invention by a predetermined amount. The same is a cross-sectional view of a drilling jig and a bumper in a state where the bumper is being punched out. It is a cross-sectional view of a drilling jig and a bumper in a state where the bumper is punched out.

Hereinafter, examples of the present invention will be described with reference to FIGS. 1 to 25 attached to the invention. The examples described below do not limit the content of the present invention described in the claims. Moreover, not all of the configurations described below are essential requirements of the present invention.

As shown in FIG. 1, the drilling jig 1 of this embodiment includes a male blade 2, a female blade 3, a hexagon bolt 4 as a shaft member, a metal washer 5, and a resin washer 6. Has been done. The male blade 2, the female blade 3, and the hexagon bolt 4 are made of hardened steel material.

As shown in FIGS. 1 to 6, the male blade 2 is formed into a hexagonal columnar tool locking portion 11 capable of locking a tool such as a spanner or a wrench, and a cylindrical shape having substantially the same diameter as the tool locking portion 11. It is composed of an intermediate cylindrical portion 12 formed, a tapered portion 13 whose diameter gradually increases from the intermediate cylindrical portion 12, and a blade forming portion 14 formed in a cylindrical shape having a diameter larger than that of the intermediate cylindrical portion 12. There is. Although the tool locking portion 11 of this embodiment is formed in a hexagonal columnar shape, it may have another shape corresponding to the tool to be used, for example, a triangular columnar column or a square columnar column. Further, a screw hole 16 as a shaft connecting hole in which the female screw portion 15 is formed is formed in the radial center portion of the male blade 2, and the end portion 17 of the tool locking portion 11 has a screw hole 16. It is open. The female screw portion 15 can be screwed with the male screw portion 43 formed on the hexagon bolt 4. The blade surface 18 which is the end surface of the blade forming portion 14 formed in an annular shape is formed in a flat shape, and the blade angle portion 19 formed on the blade surface 18 and the outer peripheral corner portion of the blade surface 18 is the blade portion 20. Is.

As shown in FIGS. 1, 7, and 8, the female blade 3 includes a storage portion 31 formed in a cylindrical shape and a base portion 32 formed in a cylindrical shape having a diameter smaller than that of the storage portion 31. Has been done. The storage portion 31 is provided with a blade portion storage hole 33 having a diameter larger than the outer diameter of the blade forming portion 14 of the male blade 2. Further, the storage portion 31 and the base portion 32 are provided with shaft insertion holes 34 through which the body portion 42 and the male screw portion 43 of the hexagon bolt 4 can be inserted. The blade storage hole 33 and the shaft insertion hole 34 communicate with each other. The diameter of the blade accommodating hole 33 is slightly larger than the outer diameter of the blade forming portion 14, and the blade forming portion 14 can be inserted and removed. Further, the diameter of the shaft insertion hole 34 is slightly larger than the outer diameter of the body portion 42 of the hexagon bolt 4, and the body portion 42 and the male screw portion 43 of the hexagon bolt 4 can be inserted and removed. The contact surface 35, which is the end surface of the storage portion 31 on the opposite side to the base portion 32, is formed in a flat shape. A chamfered portion 36 is formed on the outer peripheral corner of the contact surface 35, the outer peripheral corner of the end surface of the storage portion 31 opposite to the contact surface 35, and the outer peripheral corner of the end surface of the base 32 opposite to the storage portion 31. , 37, 38 are formed.

As shown in FIG. 1, the hexagon bolt 4 includes a head 41 formed in a hexagonal columnar shape, a body portion 42 formed in a columnar shape, and a male screw portion 43. The head 41 is provided with a flange portion 44. Further, the diameter of the body portion 42 is formed to be slightly larger than the diameter of the male screw portion 43. Although the shaft member of this embodiment uses a hexagon bolt 4, a hexagon socket head cap screw (not shown) or a hexagon socket head cap screw (not shown) may be used.

As shown in FIGS. 1, 9, and 10, the metal washer 5 and the resin washer 6 are all formed in the shape of an annulus plate. The outer diameter of the metal washer 5 is smaller than the outer diameter of the resin washer 6 and is substantially the same as the outer diameter of the flange portion 44 of the hexagon bolt 4, and the outer diameter of the resin washer 6 is substantially the same as the outer diameter of the base 32 of the female blade 3. They are formed in the same way.

Here, a method of drilling a punching hole 52 in a bumper 51 of a vehicle (not shown) as a body to be drilled using the drilling jig 1 will be described. First, the setting of the drilling jig 1 will be described. First, a temporary hole 53, which is smaller than the punched hole 52 to be finally drilled and has a diameter through which the male screw portion 43 of the hexagon bolt 4 can be inserted, is made into the bumper 51 by using a tool (not shown) such as a drill. Drill. FIG. 11 shows the bumper 51 before the temporary hole 53 is drilled, and FIG. 12 shows the bumper 51 in the state where the temporary hole 53 is drilled. Next, the hexagon bolt 4 is inserted into the metal washer 5 and the resin washer 6. At this time, the metal washer 5 is set to be on the head 41 side. Next, the hexagon bolt 4 is inserted from the base 32 side into the shaft insertion hole 34 and the blade storage hole 33 of the female blade 3, and the metal washer 5 and the resin washer 6 are sandwiched between the female blade 3 and the flange portion 44 of the hexagon bolt 4. do. At this time, the hexagon bolt 4 is loosely inserted into the female blade 3, and the hexagon bolt 4 is rotatable in the blade storage hole 33 and the shaft insertion hole 34 of the female blade 3. Next, the male screw portion 43 of the hexagon bolt 4 is inserted into the temporary hole 53 from the back surface 55 side as the other side surface on which the paint 54 of the bumper 51 is not applied, and the contact surface 35 of the storage portion 31 is the back surface of the bumper 51. It is brought into contact with 55. In this state, the male blade 2 is screwed into the male screw portion 43 of the hexagon bolt 4 protruding toward the painted surface 56 as one side surface of the bumper 51. When the male blade 2 is rotated around the hexagon bolt 4 to approach the bumper 51 and the blade surface 18 of the male blade 2 is brought into contact with the painted surface 56 of the bumper 51, the male blade 2 and the female blade 3 make the bumper 51. It will be sandwiched and the setting will be completed. FIG. 13 shows a state in which the setting is completed. The male blade 2 and the hexagon bolt 4 can be easily screwed by rotating the male blade 2 while pressing the hexagon bolt 4, but the hexagon bolt 4 may be rotated and screwed while pressing the male blade 2. Then, both the male blade 2 and the hexagon bolt 4 may be rotated and screwed. Further, the male blade 2 and the hexagon bolt 4 may be rotated by the operator directly by hand, or may be rotated by using a tool (not shown) such as a wrench or a spanner.

Next, a method of drilling a punched hole 52 in the bumper 51 coated with the coating 54 will be described. The diameter of the punched hole 52 in this embodiment is about 2 cm, but the punched hole 52 can have an arbitrary diameter by changing the diameter of the blade portion 20. First, with the hexagon bolt 4 fixed so as not to rotate, the male blade 2 is rotated around the hexagon bolt 4 to approach the female blade 3. At this time, the coating 54 of the bumper 51 in contact with the blade portion 20 of the male blade 2 is cut by a predetermined amount. Then, the rotation of the male blade 2 is stopped and fixed, leaving the coating 54 having a predetermined thickness. FIG. 14 shows a state in which the coating 54 is cut by a predetermined amount and the rotation of the male blade 2 is stopped. Next, the hexagon bolt 4 is rotated while the male blade 2 is fixed so as not to rotate, and the male screw portion 43 of the hexagon bolt 4 is screwed into the female screw portion 15 of the male blade 2. At this time, the blade portion 20 of the male blade 2 and the contact surface 35 of the female blade 3 are pressed more strongly against the bumper 51. The reason why the male blade 2 is fixed so as not to rotate is to prevent the coating 54 from being cut more than necessary. When the hexagon bolt 4 is further rotated, the shearing force acting on the bumper 51 becomes equal to or greater than the shear strength of the bumper 51, and the bumper 51 is punched out by the male blade 2. As described above, the drilling of the punched hole 52 using the drilling jig 1 is a so-called shearing process, in which the male blade 2 functions as a punch and the female blade 3 functions as a die. When the bumper 51 is punched out, the blade portion 20 of the male blade 2 and the fragment 57 of the punched bumper 51 are stored in the blade portion storage hole 33 of the female blade 3. FIG. 15 shows a state in which the bumper 51 is being punched out, and FIG. 16 shows a state in which the bumper 51 is punched out and the blade portion 20 and the debris 57 are housed in the blade portion accommodating hole 33. Finally, the male blade 2 is rotated around the hexagon bolt 4 to move it away from the female blade 3, the male blade 2 is removed from the hexagon bolt 4, the hexagon bolt 4 is pulled out from the punch hole 52, and the fragment 57 is pulled out from the blade portion. If it is taken out from the storage hole 33, the punched hole 52 is formed in the bumper 51.

In the method for drilling the punched hole 52 described above, by cutting the coating 54 while leaving a predetermined thickness, the coating 54 remaining when the bumper 51 is punched and the base material of the bumper 51 are pulled inside the punching hole 52. , The opening angle 58 of the coating 54 and the opening angle 59 of the bumper 51 have a curved shape. As a result, the opening corner portion 59 of the bumper 51 is covered with the coating 54, and burrs do not occur at the opening edge portion of the punched hole 52, resulting in a good finish. Further, since the boundary between the coating 54 and the base material of the bumper 51 is located inside the punching hole 52, it becomes difficult to see the boundary between the base material of the bumper 51 and the coating 54 when the bumper 51 is viewed from the outside, and the punching hole 52 It is possible to prevent the appearance from being spoiled by the drilling. In this embodiment, the thickness of the bumper 51 is 3 mm, the thickness of the coating 54 is 0.050 to 0.052 mm, the screw pitch of the male screw portion 43 of the hexagon bolt 4 is 1.25 mm, and the coating 54 is applied. The male blade 2 is rotated by about 180 ° when cutting. When the thickness and the screw pitch of the coating 54 are changed, the amount of rotation of the male blade 2 may be determined so as to leave a predetermined amount of the coating 54.

The drilling jig 1 of this embodiment can also be used for drilling a punched hole 52 of a bumper 51 to which the coating 54 is not applied. The bumper 51 is made of a synthetic resin such as polypropylene (PP) or polycarbonate (PC). When the bumper 51 is punched with a punched hole 52 by ordinary shearing, the opening angle 59 of the bumper 51 is generated by the shearing force. Etc. will be distorted, and the deformed portion will be whitened and the appearance will be impaired. Therefore, while fixing the hexagon bolt 4 so as not to rotate, the male blade 2 is rotated by a predetermined amount, for example, 360 °, and the surface side of the bumper 51 is cut by a predetermined amount. After that, the hexagon bolt 4 is rotated while fixing the male blade 2 so as not to rotate, and the bumper 51 is punched out by the male blade 2 to drill a punching hole 52. In this case, unlike the case of the bumper 51 coated with the coating 54 described above, the opening angle portion 59 of the bumper 51 does not have a curved shape.

Next, a method of drilling a punch hole 52 in a bumper 51 to which a coating 54 made of a mixed material of polycarbonate (PC) and acrylonitrile styrene acrylate (ASA) is not applied will be described. The bumper 51 made of a mixed material of PC and ASA has high hardness, and it is difficult to cut the surface with the male blade 2. Therefore, the hexagon bolt 4 is rotated while the male blade 2 is fixed so as not to rotate, and the bumper 51 is punched out by the male blade 2. The opening angle portion 59 of the bumper 51 has a curved shape because it is pulled inward of the punched hole 52.

As described above, the drilling jig 1 of the present embodiment includes a male blade 2, a female blade 3, and a hexagon bolt 4, and the male blade 2 and the hexagon bolt 4 can be connected to each other. The male blade 2 is formed with a screw hole 16 through which the hexagon bolt 4 is inserted and a blade portion 20, the blade portion 20 has a flat blade surface 18, and the female blade 3 has the hexagon bolt. Since the shaft insertion hole 34 through which 4 is inserted and the blade storage hole 33 capable of accommodating the blade 20 are formed, the coating 54 applied to the bumper 51 is evenly cut by the male blade 2 and then. The bumper 51 can be punched out by the male blade 2 to drill a punched hole 52. Further, since the coating 54 of the opening corner 58 of the punching hole 52 is pulled toward the inside of the punching hole 52, the boundary between the base material of the bumper 51 and the coating 54 becomes difficult to see from the outside.

Further, in the drilling jig 1 of the present embodiment, the male blade 2 and the hexagon bolt 4 have the female screw portion 15 and the female screw portion 15 formed in the male blade 2 by inserting the hexagon bolt 4 into the screw hole 16. Since the male screw portion 43 formed on the hexagon bolt 4 can be connected by screwing, the male blade 2 can be moved by rotating the male blade 2 around the hexagon bolt 4. Further, the moving distance of the male blade 2 can be adjusted by the rotation amount of the male blade 2 and the screw pitch.

Further, in the drilling jig 1 of the present embodiment, the hexagon bolt 4 is a hexagon socket head bolt or a hexagon bolt or a hexagon socket head bolt having a hexagonal columnar head, and the tool can be locked to the male blade 2. Since the locking portion 11 is formed, the male blade 2 and the hexagon bolt 4 can be locked with a spanner or a wrench to fix or rotate the male blade 2 and the hexagon bolt 4.

Further, in the drilling method of the present embodiment, a temporary hole 53 for inserting the hexagon bolt 4 is formed in the bumper 51 having the painted surface 56 coated with the coating 54, and the hexagon bolt 4 inserted through the shaft insertion hole 34 is inserted. Insert the female blade 3 into the temporary hole 53 from the back surface 55 side of the bumper 51, bring the female blade 3 into contact with the bumper 51, connect the male blade 2 and the hexagon bolt 4, and connect the blade surface 18 to the bumper 51. The bumper 51 is sandwiched between the male blade 2 and the female blade 3 and the male blade 2 is rotated about the hexagon bolt 4 while fixing the hexagon bolt 4 so as not to rotate. The female blade 3 is brought close to the female blade 3, a part of the coating 54 is cut by the blade portion 20, and the hexagonal bolt 4 is rotated while fixing the male blade 2 so as not to rotate. By bringing the female blade 3 into close proximity and punching out the bumper 51, the coating 54 applied to the bumper 51 is cut by the male blade 2, and then the bumper 51 is punched out by the male blade 2 to drill a punching hole 52. be able to. Further, since the coating 54 of the opening corner 58 of the punching hole 52 is pulled toward the inside of the punching hole 52, the boundary between the base material of the bumper 51 and the coating 54 becomes difficult to see from the outside, and the bumper 51 is formed by drilling the punching hole 52. It is possible to prevent the appearance of the product from being impaired. Further, the moving distance of the male blade 2 can be adjusted by the screw pitch of the female screw portion 15 and the male screw portion 43 and the rotation amount of the male blade 2, and the amount of the coating 54 to be cut by the male blade 2 can be determined.

17 to 19 show a second embodiment of the present invention, the same parts as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. In the drilling jig 1 of this embodiment, the hexagon bolt 4 is composed of two parts, a shaft portion 61 and a head portion 62.

In the female blade 3 of this embodiment, the outer diameters of the accommodating portion 31 and the base portion 32 are formed to be the same. A hexagonal groove 64 having a hexagonal opening is formed at an end portion 63 of the base portion 32 opposite to the storage portion 31. A part of the hexagonal plate-shaped rotation prevention member 65 is inserted into the hexagonal groove 64 so that the hexagonal groove 64 can be locked. As shown in FIG. 19, the rotation prevention member 65 is formed with a circular hole 66 through which the shaft portion 61 can be inserted and a rectangular rectangular hole 67 through which the rotation prevention rib 72 described later can be inserted. .. Further, the storage portion 31 is provided with a blade storage hole 33 and a fragment storage hole 68 capable of storing fragments punched out from the bumper 51. The diameter of the debris storage hole 68 is formed to be larger than the diameter of the blade storage hole 33.

The shaft portion 61 of the hexagon bolt 4 is formed with a male blade screw portion 69 for screwing the male blade 2 on one end side and a head screw portion 70 for screwing the head 62 on the other end side. There is. The male blade screw portion 69 and the head screw portion 70 are formed to have substantially the same diameter. A columnar guide portion 71 is formed between the male blade screw portion 69 and the head screw portion 70. The guide portion 71 is formed to have a larger diameter than the male blade screw portion 69 and the head screw portion 70. By providing the guide portion 71 instead of using all the screw bolts for the shaft portion 61, the lengths of the male blade screw portion 69 and the head screw portion 70, which are the screw portions, are shortened, and the male when hardened is provided. Distortion of the blade screw portion 69 and the head screw portion 70 is suppressed. Further, the outer diameter of the guide portion 71 is designed to be slightly smaller than the diameter of the shaft insertion hole 34 of the female blade 3, and rattling when the guide portion 71 is inserted into the shaft insertion hole 34 is minimized. ing. As a result, the blade surface 18 of the male blade 2 and the contact surface 35 of the female blade 3 can be made more parallel with the drilling jig 1 set. A rotation prevention rib 72 having a substantially rectangular cross section is formed between the screw portion 70 for the head and the guide portion 71 so as to project outward in the radial direction of the shaft portion 61. The anti-rotation rib 72 is formed to be slightly smaller than the rectangular hole 67, and as soon as the shaft portion 61 is rotated with the anti-rotation rib 72 inserted into the rectangular hole 67, the outer portion 76 of the anti-rotation rib 72 is formed. It is designed to be locked to the inner portion 77 of the rectangular hole 67.

A shaft screw hole 73 is formed in the radial center of the head 62, and the head screw portion 70 of the shaft 61 is screwed into the shaft screw hole 73 to form a shaft portion 61. The head 62 can be connected. Shaft screw holes 73 are opened at both ends of the head portion 62 in the axial direction.

Here, the setting method of the drilling jig 1 of this embodiment will be described. First, the rotation prevention member 65 is inserted into the hexagonal groove 64, and the guide portion 71 of the shaft portion 61 is inserted into the shaft insertion hole 34 of the female blade 3. At this time, the rotation prevention rib 72 is inserted into the rectangular hole 67 of the rotation prevention member 65. Next, the head screw portion 70 is inserted into the metal washer 5 and the resin washer 6, and the head 62 is screwed into the head screw portion 70. At this time, the metal washer 5 is set to be on the head 62 side. Next, the male blade screw portion 69 of the shaft portion 61 is inserted into the temporary hole 53 from the back surface 55 side of the bumper 51, and the contact surface 35 of the female blade 3 is brought into contact with the back surface 55. Finally, the male blade 2 is screwed into the male blade screw portion 69, and the blade surface 18 is brought into contact with the painted surface 56 of the bumper 51 to complete the setting. The screwing of the male blade 2 and the head 62 may be rotated by the operator directly by hand, or may be rotated by using a tool (not shown) such as a wrench or a spanner.

When the rotation prevention member 65 is housed in the hexagonal groove 64, the outer peripheral portion 74 of the rotation prevention member 65 is locked to the inner peripheral portion 75 of the hexagonal groove 64 so that the rotation prevention member 65 does not rotate in the hexagonal groove 64. It is designed. Further, the rotation prevention rib 72 formed in the shaft portion 61 is inserted into the rectangular hole 67 formed in the rotation prevention member 65, so that the outer portion 76 of the rotation prevention rib 72 is locked to the inner portion 77 of the hexagonal groove 64. Therefore, the rotation of the shaft portion 61 is restricted. Therefore, in the state where the drilling jig 1 is set as described above, the shaft portion 61 does not rotate in the blade portion accommodating hole 33, the shaft insertion hole 34, and the debris accommodating hole 68 of the female blade 3.

Next, a method of drilling a punching hole 52 in the bumper 51 coated with the coating 54 by using the drilling jig 1 of this embodiment will be described. The diameter of the punched hole 52 in this embodiment is approximately 2 cm, but the punched hole 52 can have an arbitrary diameter by changing the diameter of the blade portion 20. First, the male blade 2 is rotated around the shaft portion 61 to approach the female blade 3. At this time, the female blade 2 is fixed so that the female blade 3, the hexagon bolt 4, and the rotation prevention member 65 do not rotate together. By the rotation of the male blade 2, the coating 54 of the bumper 51 in contact with the blade portion 20 of the male blade 2 is cut by a predetermined amount. Then, the rotation of the male blade 2 is stopped and fixed, leaving the coating 54 having a predetermined thickness. Next, the head portion 62 is rotated around the shaft portion 61 in a state where the male blade 2 is fixed so as not to rotate, and the head portion 62 is brought close to the male blade 2. At this time, the female blade 3 is pressed against the head 62, and the blade portion 20 of the male blade 2 and the contact surface 35 of the female blade 3 are pressed more strongly against the bumper 51. When the head portion 62 is further rotated, the shearing force acting on the bumper 51 becomes equal to or greater than the shear strength of the bumper 51, and the bumper 51 is punched out by the male blade 2. When the bumper 51 is punched out, the blade portion 20 of the male blade 2 is stored in the blade portion storage hole 33, and the punched fragment 57 of the bumper 51 is stored in the blade portion storage hole 33 or the fragment storage hole 68. Finally, the male blade 2 is rotated to move it away from the female blade 3, the male blade 2 is pulled out from the female blade 3 and the punching hole 52, and the male blade 2 and the screw portion 69 for the male blade are unscrewed to remove the bumper. A punched hole 52 is formed in the 51. The fragment 57 of the bumper 51 may be taken out from the female blade 3 and discarded.

As described above, in the drilling jig 1 of the present embodiment, the hexagon bolt 4 has a guide portion 71, and the guide portion 71 can be inserted into the shaft insertion hole 34, so that the hexagon bolt 4 is male. The length of the screw portion 43 can be minimized, and distortion due to quenching of the hexagon bolt 4 can be suppressed. Further, it is possible to minimize rattling when the guide portion 71 is inserted into the shaft insertion hole 34.

Further, the drilling jig 1 of the embodiment of this embodiment has a shaft portion 61 and a head portion 62 to which the hexagon bolt 4 can be attached and detached, so that the shaft portion 61 does not rotate in the shaft insertion hole 34. By providing the rotation prevention member 65 that regulates rotation, the shaft portion 61 can be inserted from both directions when it is inserted into the shaft insertion hole 34. Further, when the shaft portion 61 and the head portion 62 are replaced, they can be replaced independently. Further, the rotation prevention member 65 can rotate the head portion 62 around the shaft portion 61 without rotating the shaft portion 61.

Further, in the drilling jig 1 of the embodiment of this embodiment, a temporary hole 53 for inserting the shaft portion 61 is bored in the bumper 51 having the painted surface 56 coated with the coating 54, and the blade is inserted into the shaft insertion hole 34. The shaft portion 61 is inserted into the temporary hole 53 from the back surface 55 side of the bumper 51, the female blade 3 is brought into contact with the bumper 51, the male blade 2 and the shaft portion 61 are connected, and the male blade is connected. 2 is brought into contact with the painted surface 56 of the bumper 51, the bumper 51 is sandwiched between the male blade 2 and the female blade 3, and the male blade 2 is fixed to the shaft portion 61 so as not to rotate. The head portion is rotated around 61 to approach the female blade 3, the blade portion 20 cuts a part of the coating 54, and the male blade 2 and the shaft portion 61 are fixed so as not to rotate. After rotating 62 around the shaft portion 61 to bring the male blade 2 and the female blade 3 close to each other and punching out the bumper 51, the coating 54 applied to the bumper 51 is cut by the male blade 2. , The bumper 51 can be punched out by the male blade 2 to drill a punched hole 52. Further, since the coating 54 at the opening edge of the punching hole 52 is pulled toward the inside of the punching hole 52, the boundary between the base material of the bumper 51 and the coating 54 becomes difficult to see from the outside, and the bumper 51 accompanying the drilling of the punching hole 52 It is possible to suppress the deterioration of the appearance of the. Further, the moving distance of the male blade 2 can be adjusted by the screw pitch of the female screw portion 15 and the male screw portion 43 and the rotation amount of the male blade 2, and the amount of the coating 54 to be cut by the male blade 2 can be determined. Further, the punching hole 52 can be formed by rotating the head portion 62.

20 to 22 show a third embodiment of the present invention, the same parts as those of the first and second embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. In the drilling jig 1 of this embodiment, the hexagon bolt 4 is composed of two parts, a shaft portion 61 and a head portion 62, as in the case of the second embodiment.

The female blade 3 of this embodiment is not formed with the hexagonal groove 64 of the second embodiment, but a rectangular prevention plate insertion hole 82 is formed in the side portion 81 of the female blade 3. A rectangular plate-shaped rotation prevention plate 83 as a rotation prevention member can be inserted into the prevention plate insertion hole 82. The length L1 of the opening of the prevention plate insertion hole 82 in the longitudinal direction is formed to be slightly larger than the length M1 of the rotation prevention plate 83 in the longitudinal direction, and the length L2 of the opening of the prevention plate insertion hole 82 in the lateral direction is The rotation prevention plate 83 is formed to be slightly larger than the length M2 in the lateral direction, so that the rotation prevention plate 83 can hardly move in the prevention plate insertion hole 82.

An elongated rectangular narrow groove 85 is formed on the side surface portion 84 of the guide portion 71 of the shaft portion 61. The longitudinal length N1 of the narrow groove 85 is formed sufficiently longer than the longitudinal length M1 of the rotation prevention plate 83, and the shaft is formed even when the rotation prevention plate 83 is inserted into the narrow groove 85. The portion 61 is movable in the axial direction in the shaft insertion hole 34. Further, the length N2 in the lateral direction of the narrow groove 85 is formed to be slightly larger than the length M2 in the lateral direction of the rotation prevention plate 83, and the rotation prevention plate 83 is formed in the narrow groove 85 in the lateral direction. Is almost immovable. The length L2 of the opening of the prevention plate insertion hole 82 in the lateral direction and the length N2 of the narrow groove 85 in the lateral direction are formed to be substantially the same.

Here, the setting of the drilling jig 1 of this embodiment will be described. First, the guide portion 71 of the shaft portion 61 is inserted into the shaft insertion hole 34 of the female blade 3. Next, the head screw portion 70 is inserted into the metal washer 5 and the resin washer 6, and the head 62 is screwed into the head screw portion 70. At this time, the metal washer 5 is set to be on the head 62 side. Next, the shaft portion 61 is rotated in the shaft insertion hole 34 to align the position of the prevention plate insertion hole 82 and the narrow groove 85, and the rotation prevention plate 83 is inserted into the prevention plate insertion hole 82 and the narrow groove 85. .. Next, the male blade screw portion 69 of the shaft portion 61 is inserted into the temporary hole 53 from the back surface 55 side of the bumper 51, and the contact surface 35 of the female blade 3 is brought into contact with the back surface 55. Finally, the male blade 2 is screwed into the male blade screw portion 69, and the blade surface 18 is brought into contact with the painted surface 56 of the bumper 51 to complete the setting. The screwing of the male blade 2 and the head 62 may be rotated by the operator directly by hand, or may be rotated by using a tool (not shown) such as a wrench or a spanner. Since the method of drilling the punched hole 52 in the bumper 51 coated with the coating 54 using the drilling jig 1 of this embodiment is the same as that of the second embodiment, the description thereof will be omitted.

As described above, the drilling jig 1 of the present embodiment has a shaft portion 61 and a head portion 62 to which the hexagon bolt 4 can be attached and detached, so that the shaft portion 61 does not rotate in the shaft insertion hole 34. By providing the rotation prevention plate 83 that regulates the rotation of the shaft portion 61, the shaft portion 61 can be inserted from both directions when the shaft portion 61 is inserted into the shaft insertion hole 34. Further, when the shaft portion 61 and the head portion 62 are replaced, they can be replaced independently. Further, the rotation prevention plate 83 allows the head portion 62 to be rotated around the shaft portion 61 without rotating the shaft portion 61.

23 to 25 show Example 4 of the present invention, the same parts as those in Examples 1 to 3 are designated by the same reference numerals, and detailed description thereof will be omitted. In the drilling jig 1 of this embodiment, the female blade 3 includes a leaf spring 91 as an urging means.

The leaf spring 91 is attached to the side portion 92 of the female blade 3. The leaf springs 91 are provided at two positions facing each other in the radial direction of the storage portion 31. The leaf spring 91 has a fixing portion 93 substantially parallel to the contact surface 35, an arm portion 94 extending in a direction away from the female blade 3, a support portion 95 that comes into contact with the back surface 55 of the bumper 51, and a tip of the support portion 95. It is composed of a bent portion 96 bent in a direction away from the bumper 51 formed on the side. When no external force is applied to the leaf spring 91, the support portion 95 of the leaf spring 91 projects outward from the contact surface 35 in the axial direction of the female blade 3.

Here, the setting of the drilling jig 1 of this embodiment will be described. First, the hexagon bolt 4 is inserted into the female blade 3, the contact surface 35 of the female blade 3 is brought into contact with the back surface 55 of the bumper 51, and the male screw portion 43 is inserted into the temporary hole 53. At this time, the support portion 95 of the leaf spring 91 abuts on the back surface 55 of the bumper 51, the leaf spring 91 bends so as to spread outward in the radial direction of the female blade 3, and the elastic force of the leaf spring 91 is applied to the back surface 55 of the bumper 51. Is added, and the female blade 3 is urged away from the bumper 51. Next, the male blade 2 is screwed into the male screw portion 43, and the blade surface 18 is brought into contact with the painted surface 56 of the bumper 51 to complete the setting.

Next, a method of drilling the punched hole 52 using the drilling jig 1 of this embodiment will be described. The diameter of the punched hole 52 in this embodiment is about 2 cm, but the punched hole 52 can have an arbitrary diameter by changing the diameter of the blade portion 20. From the state where the drilling jig 1 is set, the male blade 2 is rotated around the hexagon bolt 4 to cut a part of the coating 54. First, the male blade 2 is rotated around the hexagon bolt 4 to approach the female blade 3. At this time, the hexagon bolt 4 is fixed so that the female blade 3 and the hexagon bolt 4 do not rotate. By the rotation of the male blade 2, the coating 54 of the bumper 51 in contact with the blade portion 20 of the male blade 2 is cut by a predetermined amount. Then, the rotation of the male blade 2 is stopped and fixed, leaving the coating 54 having a predetermined thickness. Next, when the hexagon bolt 4 is rotated while the male blade 2 is fixed so as not to rotate, the blade portion 20 of the male blade 2 and the contact surface 35 of the female blade 3 are pressed more strongly against the bumper 51. When the hexagon bolt 4 is further rotated, the shearing force acting on the bumper 51 becomes equal to or greater than the shear strength of the bumper 51, and the bumper 51 is punched out by the male blade 2. When the bumper 51 is punched out, the blade portion 20 and the fragment 57 of the male blade 2 are stored in the blade portion accommodating hole 33. Further, when the bumper 51 is punched out, the female blade 3 moves in the direction away from the bumper 51 due to the elastic force of the leaf spring 91. At this time, the male blade 2, the hexagon bolt 4, and the fragment 57 move together with the female blade 3 by the elastic force of the leaf spring 91. Therefore, in this embodiment, the punching hole 52 is formed by collecting the drilling jig 1 from the back surface 55 side of the bumper 51. The fragment 57 of the bumper 51 may be taken out from the female blade 3 and discarded.

As described above, in the drilling jig 1 of the present embodiment, the female blade 3 is provided with the leaf spring 91, and the leaf spring 91 urges the female blade 3 in the direction away from the bumper 51 to punch holes. Since the male blade 2 moves away from the bumper 51 due to the elastic force of the leaf spring 91 after the 52 is bored, the drilling jig 1 can be easily recovered from the back surface 55 side of the bumper 51. Further, since the drilling jig 1 moves in a direction substantially perpendicular to the back surface 55 of the bumper 51, it is possible to prevent the drilling jig 1 from coming into contact with the opening edge of the punched hole 52 and damaging the opening edge. can.

The present invention is not limited to the above examples, and various modifications can be made within the scope of the gist of the present invention. For example, the intermediate cylindrical portion, the accommodating portion, and the base portion may be appropriately changed to any shape other than the cylindrical shape, for example, a square tubular shape. Further, as the urging means for urging the female blade, a means other than the leaf spring may be used.

1 Drilling jig 2 Male blade 3 Female blade 4 Hexagon bolt (shaft member)
11 Tool locking part 15 Female screw part 16 Screw hole (shaft connection hole)
18 Blade surface 20 Blade 31 Storage 33 Blade storage hole 34 Shaft insertion hole 43 Male screw part 51 Bumper (object to be drilled)
53 Temporary hole 54 Painting 55 Back side (other side)
56 Painted surface (one side)
61 Shaft part 62 Head 65 Anti-rotation member 71 Guide part 83 Anti-rotation plate (anti-rotation member)
91 Leaf spring (biasing means)

Claims (8)

It is composed of a male blade, a female blade, and a shaft member.
The male blade and the shaft member can be connected,
The male blade is formed with a shaft connecting hole through which the shaft member is inserted , a blade portion, and a tool locking portion for locking a manual tool.
The blade portion has a flat blade surface that evenly cuts and shears the coating applied to one side surface of the object to be drilled.
The female blade is formed with a shaft insertion hole through which the shaft member is inserted and a blade storage hole capable of accommodating the blade portion .
A part of the coating is cut by the blade portion, and the shaft member is rotated while fixing the male blade so as not to rotate so that the male blade and the female blade come close to each other and punch out the object to be drilled. A drilling jig characterized by that. The male blade and the shaft member can be connected by inserting the shaft member into the shaft connecting hole and screwing the female screw portion formed on the male blade and the male screw portion formed on the shaft member. The drilling jig according to claim 1, wherein the drilling jig is characterized by the above. Drilling jig according to claim 1 or 2, wherein the shaft member is hexagonal socket bolt or hexagon bolt or head is hexagonal columnar hexagon socket head bolts. The drilling jig according to any one of claims 1 to 3, wherein the shaft member has a guide portion, and the guide portion can be inserted into the shaft insertion hole. Claims 1 to 4 include a shaft portion and a head portion to which the shaft member can be attached and detached, and an anti-rotation member that regulates rotation so that the shaft portion does not rotate in the shaft insertion hole. The drilling jig according to any one of the above items. Drilling according to said urging means provided on the female blade, any one of the preceding claims, wherein the biasing means is characterized by biased away the female blade from the object to be drilled body jig. Drilled a temporary hole for inserting the shaft member said to be drilled body painted on one side,
The shaft member inserted into the shaft insertion hole is inserted into the temporary hole from the other side surface side of the object to be drilled.
The female blade is brought into contact with the object to be drilled,
By connecting the male blade and the shaft member,
The blade surface is brought into contact with the one side surface of the object to be drilled.
The object to be drilled is sandwiched between the male blade and the female blade.
While fixing the shaft member so as not to rotate, the male blade is rotated around the shaft member to approach the female blade, and a part of the coating is cut by the blade portion.
Any of claims 1 to 4, wherein the shaft member is rotated while fixing the male blade so as not to rotate, the male blade and the female blade are brought close to each other, and the object to be drilled is punched out. A drilling method using the drilling jig described in item 1. It drilled a temporary hole for inserting the shaft portion and the to-be bored body painted on one side,
The shaft portion inserted through the shaft insertion hole is inserted into the temporary hole from the other side surface side of the object to be drilled.
The female blade is brought into contact with the object to be drilled,
By connecting the male blade and the shaft portion,
The male blade is brought into contact with the one side surface of the object to be drilled.
The object to be drilled is sandwiched between the male blade and the female blade.
While fixing the shaft portion so as not to rotate, the male blade is rotated around the shaft portion to approach the female blade, and a part of the coating is cut by the blade portion.
The male blade and the shaft portion are fixed so as not to rotate, and the head is rotated around the shaft portion to bring the male blade and the female blade close to each other to punch out the object to be drilled. The drilling method using the drilling jig according to claim 5.

Images