JP2020049650A - Drill for drilling clip hole in weather strip, clip hole drilling device, and clip hole drilling method - Google Patents

Abstract

To provide a drill for drilling a clip hole, which require no work for removing drilling leavings, and a drilling device using the same.SOLUTION: A drill 22 is formed with one cutting edge at a peripheral edge of a tip. A drilling device comprises a groove-shaped set part 10, an electric drill 20 that is fitted with the drill 22, a holding pin 30, and a cutting blade 40. When a hole is drilled, both ends of a weather strip 100 are cut with the cutting blade 40 while the weather strip 100 is held in the state of being pressed to be crushed by the holding pin 30. Additionally, a clip hole is drilled by the electric drill 20.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a clip hole drill for use in drilling a clip hole in a weather strip, a clip hole drilling device and a clip hole drilling method for drilling a clip hole in a weather strip.

  As shown in FIG. 1, a weather strip 100 disposed on the periphery of a door opening of an automobile integrally has a hollow cylindrical hollow seal portion 101 and a flat mounting portion 102. 1), the clip 110 is attached to the mounting portion 102, and the clip 110 is fitted to the vehicle body 120 as shown in FIG. The weather strip 100 is made of rubber or an elastomer, and after being extruded into a predetermined shape as shown in FIG. 1A, a clip hole 103 for mounting a clip 110 as shown in FIG. 1B. Is manufactured through a step of perforating the mounting portion 102.

  Here, the clip holes are generally often drilled with an electric drill. Typically, a drill (drill bit) for drilling used in an electric drill has a sharp point at the center in the radial direction of the tip of the drill, and a plurality of cuts extending outward from the center in the radial direction. Twist drills whose blades extend radially (herein referred to as "center blade drills" for convenience of description) are mentioned.

  However, such a center-edged drill is suitable mainly for a relatively rigid material such as wood or metal, and is not suitable for processing a soft material such as rubber or elastomer. In other words, the center blade drill is a principle that drills a hole while cutting the processing object from the center to the outside with rotation, so if this is used for a soft material, the peripheral part will be caught and drill a hole with a beautiful shape Difficult to do. In addition, when a clip hole is drilled by an electric drill, generation of drill slag is inevitable, so that a processing problem also occurs.

  Therefore, as a technique for punching a clip hole or the like in a weather strip to cope with such a problem, for example, Patent Document 1 below is disclosed. In Patent Document 1, a clip hole or the like is melt-punched in a weather strip by a hot rod or a laser.

JP 2000-118323 A

  In Patent Literature 1, since a clip hole or the like is formed by melting a part of the weather strip, no drill residue is generated. However, it is difficult to precisely control the size and the shape of the hole in the melt drilling. In addition, running costs increase because heat is used. Moreover, there is no particular reference to an apparatus or method for efficiently drilling a plurality of holes.

  Therefore, it is desirable that the clip hole is also formed by an electric drill. However, the shape of the hole becomes a problem in the center blade drill based on the principle of drilling a hole as described above. In order to solve this, it is conceivable to use a drill in which a cutting edge is formed on the peripheral edge of the distal end (hereinafter referred to as “peripheral edge drill” with respect to the center edge drill for convenience of description).

  The peripheral edge drill rotates along the outer peripheral edge of the hole to be drilled and cuts out the hole, so that a hole of a desired size can be neatly drilled. Conventionally, such peripheral edge drills include a punch blade type in which the entire periphery of the drill tip is a cutting edge, and a multi-blade type in which a plurality of cutting edges are formed protruding along the peripheral edge of the drill. .

  However, when a clip hole is drilled with a punch blade type peripheral edge drill, drilling residue remains in a hollow space of the drill surrounded by the peripheral edge. In this case, in order to continuously drill a plurality of clip holes, it is necessary to remove the drilling residue from the drill for each drilling, which is extremely complicated, and is not suitable for realistic continuous processing.

  On the other hand, in the case of a multi-blade type peripheral edge drill, since the entire periphery is not surrounded by the cutting edge, drilling residue does not remain on the drill side. However, during the drilling, the escape area for the drilling residue is closed by the plurality of cutting blades, so that the drilling residue remains in the clip hole after the drilling. In this case, it is necessary to remove the drill residue from the clip hole after drilling.

  Therefore, the present invention is to solve the above-mentioned problem, and a drill for drilling a clip hole of a weather strip, which does not require the removal of drilling residue, a clip hole drilling device capable of efficiently drilling a plurality of clip holes, and a clip hole drilling machine The aim is to provide a method.

As means for that purpose, the present invention employs the following means.
[1] A drill attached to a drilling means for drilling a clip hole in a weather strip provided on a periphery of a door opening of an automobile via a clip by the drilling means,
A drill for drilling a clip hole of a weather strip, wherein one cutting edge protrudes from a peripheral edge of a tip portion.
[2] A clip hole punching device for punching a clip hole in a weather strip provided via a clip to a periphery of a door opening of an automobile,
A setting section for setting a weather strip,
Drill means for drilling a clip hole in the weather strip;
Holding means for holding the weather strip set in the setting portion,
With
The set portion is formed as a groove-shaped concave space that can receive and accommodate a weather strip,
The drill means is provided so as to be able to advance and retreat inside and outside the set portion,
The holding means is provided so as to be able to advance and retreat inside and outside the set part at a position opposite to the drill means with the set part interposed therebetween,
In a neutral state before drilling the clip hole, the drilling means and the holding means are located outside the set portion,
When a weather strip is set on the set portion and a clip hole is punched, the holding means projects into the setting section and presses and holds the weather strip so as to crush the weather strip, and then the clip hole is drilled by the drill means. A clip hole punching device configured to:
[3] A plurality of the drilling means are provided side by side along a longitudinal direction of the set portion,
The clip hole punching device according to [2], wherein the holding means is a plurality of holding pins arranged in parallel corresponding to the drill means.
[4] Each of the drill means is provided on a single base plate which can advance and retreat with respect to the set portion, and all the drill means simultaneously advance and retreat.
The clip hole punching device according to [3], wherein the holding units are connected to each other by a connecting rod, and all the holding units also advance and retreat at the same time.
[5] Further, a cutting blade for cutting the weather strip set in the setting section is provided,
The cutting blade is provided so as to be able to move in and out of the set section,
In the setting part, a weather strip preliminary body that has been preliminarily cut into a rough length through extrusion molding is set, and when drilling a clip hole, the weather strip preliminary body is reduced to a length dimension of a final product by the cutting blade. The clip hole punching device according to any one of [2] to [4], which is cut.
[6] The cutting blade is moved forward / backward by forward / backward means,
When the cutting blade is projected into the set portion by the advance / retreat means, the connecting rod is also pressed by the advance / retreat means, so that the cutting blade and the holding means simultaneously project into the set portion, The clip hole punching device according to [5], wherein the cutting blade and the holding unit are also operated to advance and retreat.
[7] The cutting blade and the advancing and retreating means for moving the cutting blade forward and backward are provided at two places on both sides in the longitudinal direction of the set portion,
The clip hole punching device according to [6], wherein the connecting rod is pressed from both sides in the longitudinal direction by the bi-progression / retraction means.
[8] The drill means can be moved in and out of the set part through a through hole provided in a side wall of the set part,
The clip hole punching device according to any one of [2] to [7], wherein a bottom surface of the through hole is an inclined surface inclined downward from the inside to the outside of the set portion.
[9] The clip hole drilling device according to any one of [2] to [8], wherein the drill mounted on the drill means is the drill for clip hole drilling according to [1].
[10] The weather strip has a hollow cylindrical seal portion and an attachment portion to which a clip is attached,
The clip hole punching device according to any one of [2] to [9], wherein an amount of protrusion of the drill into the set portion is smaller than a total thickness of the seal portion and the attachment portion.
[11] A clip hole drilling method for drilling a clip hole in a weather strip disposed around a door opening of an automobile via a clip,
Drill means for drilling a clip hole in the weather strip with a set part formed as a groove-shaped concave space capable of receiving and containing the weather strip, and holding means for holding the weather strip set in the set part. , Facing each other,
In a neutral state before drilling the clip hole, the drilling means and the holding means are located outside the set portion,
When the weather strip is set on the set portion and the clip hole is punched, the holding means projects into the set section and presses and holds the weather strip so as to crush the weather strip, and then the drill means drills the clip hole. , Clip hole drilling method.
[12] A plurality of the drill means are provided side by side along the longitudinal direction of the weather strip,
The clip hole drilling method according to [11], wherein the holding means is a plurality of holding pins arranged in parallel corresponding to the drill means.
[13] Each of the drill means is provided on a single base plate which can advance and retreat with respect to the set portion, and all the drill means advance and retreat simultaneously with respect to the set portion,
The clip hole drilling method according to [12], wherein the holding units are connected to each other by a connecting rod, and all the holding units also advance and retreat with respect to the setting unit at the same time.
[14] Furthermore, in order to cut the weather strip set in the setting portion, a cutting blade that can move in and out of the setting portion is provided,
In the setting part, a weather strip preliminary body that has been preliminarily cut to a rough length through extrusion molding is set, and when drilling a clip hole, the weather strip preliminary body is cut into the length dimension of the final product by the cutting blade. The clip hole punching method according to any one of [11] to [13], wherein the cutting is performed.
[15] moving the cutting blade forward and backward by forward and backward means;
The holding member is constantly biased toward the outside of the set portion by a spring,
When the cutting blade is projected into the set portion by the advance / retreat means, the connecting rod is also pressed by the advance / retreat means, so that the cutting blade and the holding means simultaneously project into the set portion, The clip hole punching method according to [14], wherein the cutting blade and the holding unit are operated in both directions.
[16] The cutting blade and the advancing and retreating means for moving the cutting blade forward and backward are provided at two places on both sides in the longitudinal direction of the set portion,
The clip hole perforating method according to [15], wherein the connecting rod is pressed from both longitudinal sides by the two-way retracting means.
[17] The drill means can be moved in and out of the set part through a through hole provided in a side wall of the set part,
The clip hole drilling method according to any one of [11] to [16], wherein the bottom surface of the through hole is a slope inclined downward from the inside to the outside of the set portion.
[18] The clip hole drilling method according to any one of [11] to [17], wherein the drill attached to the drill means is the drill for clip hole drilling according to [1].
[19] The weather strip has a hollow cylindrical seal portion and an attachment portion to which a clip is attached,
The clip hole drilling method according to any one of [11] to [18], wherein an amount of projection of the drill into the set portion is smaller than a total thickness of the seal portion and the attachment portion.

  Since the drill for clip hole drilling of the present invention is a kind of a so-called peripheral edge drill, a drill hole for a predetermined size is more beautifully drilled as a drill for drilling than a conventional central blade drill or a hole drilled by heat melting. can do. The diameter of the clip hole can be easily designed by the outer diameter of the drill. In addition, the drill for clip hole drilling of the present invention has only one cutting edge, so that drilling residue does not remain on the drill side after drilling. In addition, since the escape site of the drill residue is not blocked during the drilling, the drill residue does not remain in the clip hole after the drilling. Thus, if the clip hole is drilled by the drill for drilling a clip hole according to the present invention, the work of removing the drill residue after drilling becomes unnecessary, and the productivity can be greatly improved. In addition, in the conventional center blade drill, a spiral groove extending in the axial direction is indispensable on the outer peripheral surface of the drill body (so-called twist drill) in order to secure a positive escape path for the drilling residue. The spiral groove is not always necessary in the clip hole drill of the present invention.

  Further, in the clip hole punching apparatus and the clip punching method of the present invention, in the neutral state before punching the clip hole, the drill means and the holding means are located outside the set section, so that the weather strip can be easily and smoothly inserted into the set section. Can be set to When the weather strip is set in the setting section and the clip hole is pierced, the holding means projects into the setting section and presses and holds the weather strip so as to crush the weather strip. Can be perforated.

  It is necessary to finally form a plurality of clip holes in the weather strip along the longitudinal direction. Therefore, if a plurality of drill means are arranged side by side along the longitudinal direction of the setting portion, a plurality of clip holes can be formed at the same time, and productivity is improved.

  If the holding means is a plurality of holding pins arranged in parallel corresponding to the drill means, the other part is not pressed while reliably pressing and holding the part for punching the clip hole, so that the minimum pressing force is used. As a result, the running cost can be reduced as compared with the case where the weather strip is entirely pressed.

  If all the drilling means and the holding means are moving forward and backward at the same time, the production processing time can be reduced. Further, since all the members move forward and backward at the same time, there is no need to individually control the forward and backward movements of the individual drill means and the holding means, so that the control is easy and it is possible to avoid the occurrence of variations in the clip holes. .

  If the weatherstrip can be cut to the length of the final product at the same time as the clip hole is pierced by the cutting blade for cutting the weatherstrip, a step of separately cutting the weatherstrip to the length of the final product before or after piercing is performed. Since it can be omitted, productivity is improved.

  If the reciprocating means is also used for the reciprocating operation of the cutting blade and the holding means, it is not necessary to separately provide the reciprocating means for the cutting blade and the reciprocating means for the holding means. Costs can be reduced.

  When the cutting blade is provided only in one of the longitudinal directions of the setting portion, in order to cut to the final length dimension by the cutting blade, set the other side in the longitudinal direction of the weatherstrip preliminary body properly. It is necessary to set to the department. In this case, if the set position of the weatherstrip preliminary body is slightly displaced, an error occurs in the final length dimension of the weatherstrip. On the other hand, if the cutting blades are provided on both sides in the longitudinal direction of the setting portion, the position for setting the weatherstrip preform is not limited, so that no dimensional error occurs and the setting operation can be performed easily.

  Further, since the connecting rod connecting the holding means is long, if the connecting rod is pressed from only one side in the longitudinal direction, the other side may be stuck and may not smoothly advance and retreat with respect to the set portion. On the other hand, if the connecting rod is pressed from both sides in the longitudinal direction by the reciprocating means, the movement of the connecting rod is stabilized, and the connecting rod can be smoothly advanced and retracted with respect to the set portion.

  The drill means can be moved in and out of the set portion through a through hole provided in the side wall of the set portion, and if the bottom surface of the through hole is an inclined surface, the slag generated by the drilling can be smoothly removed. It can be discharged outside the set section.

  If the drill attached to the drill means is the drill for clip hole drilling as described in [1], a beautiful clip hole can be accurately drilled without drilling residue remaining on the weather strip or the drill.

  When drilling a clip hole in an ether strip having a seal portion and a mounting portion, if the amount of projection of the drill into the set portion is set to be smaller than the total thickness of the seal portion and the mounting portion, a hole is formed in the seal portion. Can be avoided.

It is sectional drawing which shows the manufacturing process of a weather strip. It is a top view of the perforation apparatus in a neutral state. It is a side view of the perforation apparatus in a neutral state. It is the front view and side view of a drill. FIG. 3 is a plan view of the punching device in an initial operation state. FIG. 4 is a side sectional view of the punching device in an initial operation state. It is a principal part enlarged view of the state of FIG. FIG. 4 is a plan view of the punching device in a state where the weather strip is cut and held. It is a principal part expanded side sectional view of the drilling apparatus in the state where the weather strip was cut and held. It is a top view of the perforation apparatus in a perforated state. It is a principal part expanded side sectional view of the drilling apparatus in a drilling state.

  First, a weather strip to be pierced will be described. The weather strip 100 is a long member arranged on the periphery of a door opening of an automobile. As shown in FIG. 1, the weather strip 100 integrally includes a hollow cylindrical hollow seal portion 101 and a flat mounting portion 102. Have. Then, as shown in FIG. 1C, the clip 110 is attached to the mounting portion 102, and the clip 110 is fitted to the vehicle body 120 as shown in FIG. The weather strip 100 is made of rubber or elastomer, and after being extruded into a predetermined shape as shown in FIG. 1A, a clip hole for mounting a clip 110 as shown in FIG. 1B. It is manufactured through a step of perforating 103 into the mounting portion 102. In the weather strip 100 of the present embodiment, the mounting space 102 is covered with the partition wall 104 in the hollow seal portion 101, so that the seal space S and the mounting space C for the clip 110 are separated. The hollow seal portion 101 and the partition wall 104 have the same thickness (1.3 mm in the present embodiment). Further, the thickness of the mounting portion 102 in the present embodiment is 2.0 mm.

  Subsequently, a punching device for punching a clip hole in the weather strip will be described. As shown in FIGS. 2 and 3, a clip hole punching device (hereinafter simply referred to as a punching device) includes a setting section 10 for setting a weather strip on a base 1 and an electric motor for punching a clip hole in the weather strip. A drill 20, a holding pin 30 for holding a weather strip set on the setting unit 10, and the like are provided. FIGS. 2 and 3 show a neutral state before the clip hole is formed, and a weather strip preliminary body 100 ′ described later is set in the setting unit 10. The electric drill 20 corresponds to the drill means of the present invention, and the holding pin 30 corresponds to the holding means of the present invention.

  The set portion 10 is formed as a groove-shaped concave space extending in the longitudinal direction at the center in the width direction of the upper surface of a long rectangular parallelepiped made of metal, and receives and accommodates the weatherstrip (and the weatherstrip preform 100 ′). It is possible. Therefore, the length (longitudinal dimension) of the setting portion 10 is larger than the weatherstrip (and the weatherstrip preliminary body 100 '). On the other hand, the width dimension of the set portion 10 is substantially the same as the width of the weatherstrip (and the weatherstrip preform 100 ′) in a natural state. Notches 11 are formed at two places on both side walls of the set portion 10. This makes it easier to take out the perforated weather strip 100 from the set portion 10 by grasping the notch 11 by hand.

  In the electric drill 20, a drill (drill bit) 22 for drilling is detachably attached to the tip of a commercially available drill driver 21. A plurality of electric drills 20 are juxtaposed along the longitudinal direction of the setting unit 10. The number of electric drills 20 to be installed is the same as the number of clip holes 103 that are drilled in the weather strip 100. Each electric drill 20 is installed on a single base plate 23, and is driven by supplying power from a power source (not shown).

  The base plate 23 is slidable on two slide rails 24 provided on the base 1 at right angles to the longitudinal direction of the setting section 10 in a direction approaching to and away from the setting section 10. Thus, all the electric drills 20 can move forward and backward with respect to the setting unit 10 at the same time. In the neutral state shown in FIGS. 1 and 2, each electric drill 20 is located outside the setting unit 10. On the other hand, when the clip hole 103 is formed in the weather strip 100, the base plate 23 slides in a direction approaching the setting unit 10. Thereby, the drill 22 of each electric drill 20 enters the set section 10 through the through hole 12 provided on one side wall of the set section 10 (see FIGS. 10 and 11). The bottom surface of the through hole 12 is an inclined surface inclined downward from the inside to the outside of the set portion 10. The base plate 23 is slid by the air cylinder 2 fixed to the back surface of the base 1.

  Each electric drill 20 is installed on a base plate 23 via a bracket 25. Each bracket 25 is provided on a position adjustment rail 26 provided on the base plate 23 in parallel with the longitudinal direction of the set unit 10. Thus, the left and right positions of each electric drill 20 can be adjusted by sliding each bracket 25 on the position adjustment rail 26. Each bracket 25 is normally fixed to the position adjusting rail 26 by a screw 27, and the position of the electric drill 20 during drilling is prevented from shifting. When adjusting the left and right positions of the electric drill 20, the screwing force of the screw 27 may be loosened.

  The drill 22 mounted on the electric drill 20 is a special drill (drill bit) for drilling the clip hole 103 in the weather strip 100. Specifically, as shown in FIG. 4, a single cutting edge 22b is formed on the periphery of the distal end portion of the drill body 22a so as to protrude toward the distal end. Reference numeral 22c is a shank portion mounted on the drill driver 21. As shown in FIG. 4A, the cutting edge 22b is an isosceles triangle when viewed from the front, and both sides are blades. Further, as shown in FIG. 4B, the cutting edge 22b is gradually thinner from the base end to the tip. Thereby, the rigidity of the cutting edge 22b is ensured at the base end portion, and the sharpness is ensured at the distal end portion.

  The diameter of the drill body 22a is the same as the diameter of the rotation locus of the cutting edge 22b. Therefore, the diameter of the clip hole 103 can be designed by the diameter of the drill body 22a. In the drill 22 of the present embodiment, the diameter of the drill body 22a is 4.0 mm, and the length of the cutting edge 22b is 5.5 mm. The distal end surface 22d of the drill body 22a is a tapered surface inclined toward the base end. Thereby, the escape route of the drilling residue during the drilling process is widened, and the drilling residue can be discharged to the outside more smoothly.

  Further, the protruding length of the cutting edge 22b is preferably 1.5 to 4 times, more preferably 2 to 3 times the thickness of the mounting portion 102 of the weather strip 100. If the protruding length of the cutting edge 22b is less than 1.5 times the thickness of the mounting portion 102, there is a possibility that the escape route of the piercing slag becomes small, and the scum cannot be discharged to the outside smoothly. On the other hand, as will be described later, since the clip hole 103 is pierced at the tip of the cutting edge 22b, if the protruding length of the cutting edge 22b exceeds four times the thickness of the mounting portion 102, the strength decreases. There is a high possibility that the cutting edge 22b is damaged during the selection.

  The holding pin 30 is provided on the opposite side of the electric drill 20 with the setting part 10 therebetween so as to be able to move in and out of the setting part 10. A plurality of holding pins 30 are also provided side by side along the longitudinal direction of the set portion 10. The number of the holding pins 30 to be installed is the number corresponding to the electric drill 20, and is the same as the number of the clip holes 103 perforated in the weather strip 100. Each holding pin 30 is located at a position facing each electric drill 20.

  Each holding pin 30 is formed of a bolt, and all the holding pins 30 are screwed and fixed to the connecting rod 31. As a result, all the holding pins 30 are connected to each other via the connecting rods 31 and move forward and backward with respect to the setting unit 10 at the same time. The neutral position of the connecting rod 31 is defined by coil springs 32 provided around two left and right bolts 33 screwed and fixed to the other side wall of the set portion 10. That is, the neutral position of the connecting rod 31 is a position where no urging force is generated in the coil spring 32, and is a position away from the setting unit 10 by the length of the coil spring 32. The bolt 33 is inserted into the connecting rod 31, and the connecting rod 31 moves forward and backward about the bolt 33.

  In the neutral position, each holding pin 30 is located outside the setting section 10. Specifically, the tip of each holding pin 30 (a nut screwed into the holding pin 30) is located in a through hole 13 provided in the other side wall of the setting section 10. In addition, in order to match the installation height of each electric drill 20 with the setting part 10 and the holding pin 30, the setting part 10 is installed on the pedestal 15. Reference numeral 35 denotes a stopper that regulates the movement limit of the connecting rod 31 and, in turn, the amount of protrusion of each holding pin 30 connected thereto into the set portion 10. The stoppers 35 are provided at two places on both sides in the longitudinal direction of the set unit 10.

  A cutting blade 40 that cuts a weather strip 100 (more precisely, a weather strip preform 100 ′ as described later) set in the setting unit 10 is provided outside the connecting rod 31 in the longitudinal direction. The cutting blades 40 are provided at two places on both sides in the longitudinal direction of the setting unit 10. The distance between the two cutting blades 40 is set to be the same as the length of the weather strip 100 as the final product. Both cutting blades 40 are fixed to the air cylinder 42 via the brackets 41, respectively. Thus, the cutting blade 40 can be moved in and out of the setting section 10 by the air cylinder 42. Note that the air cylinder 42 corresponds to the advancing / retracting means of the present invention.

  The air cylinder 42 is also installed on a pedestal 43 having the same height as the pedestal 15 in order to align the height position with the setting unit 10, the electric drill 20, the holding pin 30, and the like. In addition, on the pedestal 43, a rail 44 for stabilizing the forward and backward movement of the bracket 41 and the cutting blade 40 is provided. The lower portion of the bracket 41 is slidably fitted to the rail 44. Reference numeral 45 denotes a pusher that is fixed to the bracket 41, moves forward and backward together with the cutting blade 40, and presses the connecting rod 31.

  The base 1 may be horizontal or vertical, but is preferably inclined at 30 ° to 60 ° with respect to the horizontal. When the base 1 is made horizontal or vertical, it is difficult to put the weather strip 100 in and out of the set section 10. In addition, if the base 1 is vertical, it is difficult to discharge the scum smoothly to the outside.

  Next, a procedure (perforation method) for perforating the clip hole 103 in the weather strip 100 will be described. First, as shown in FIGS. 1 and 2, a weather strip extruded into a predetermined shape is set in the setting unit 10 in a neutral state of the drilling device. More specifically, the mounting portion 102 where the clip hole 103 is formed is set toward the electric drill 20. At this time, the weather strip preliminary body 100 ′ which has been preliminarily cut to a rough length through extrusion molding may be set in the setting section 10. Therefore, it is not necessary to precisely cut the length of the final product before drilling. In addition, it is not necessary to perform strict alignment in the longitudinal direction in the setting section 10.

  7 and 9, the bottom surface of the set portion 10 is formed in a shape corresponding to the outer shape of the weatherstrip 100 (and the weatherstrip preform 100 '). Thereby, the weatherstrip preform 100 ′ can be stably set on the setting unit 10. When the drilling state is in the neutral state, the drill 22 and the holding pin 30 are located outside the setting unit 10.

  When the weatherstrip preliminary body 100 'has been set in the setting section 10, a start switch (not shown) is turned on to drive the punching device. Then, as shown in FIGS. 5 to 7, the bracket 41 is protruded and moved toward the set portion 10 by the air cylinder 42. Then, the right and left pushers 45 abut on both sides in the longitudinal direction of the connecting rod 31. At the same time, the cutting blade 40 comes into contact with the weather strip preform 100 '.

  Subsequently, as shown in FIGS. 8 and 9, the cutting blade 40 protrudes into the setting unit 10 when the bracket 41 further approaches the setting unit 10. As a result, both sides in the longitudinal direction of the weatherstrip preliminary body 100 'are cut, and the weatherstrip 100 having the final product dimensions is obtained.

  At the same time, the connecting rod 31 is pressed against the urging force of the coil spring 32 by the pusher 45, and all the holding pins 30 simultaneously project into the setting unit 10. As a result, the periphery of the perforated portion of the weather strip 100 is held in a state of being crushed by the holding pin 30. In other words, the other parts are not pressed. At this time, the projection limit of the holding pin 30 and the cutting blade 40 is regulated by the connecting rod 31 contacting the stopper 35. In addition, since the connecting rod 31 is pressed simultaneously on both sides in the longitudinal direction, the connecting rod 31 and, consequently, each holding pin 30 protrude and move stably. That is, the air cylinder 42 is also used for the reciprocating operation of the cutting blade 40 and the holding pin 30.

  Subsequently, as shown in FIGS. 10 and 11, the base plate 23 is moved toward the setting unit 10 by the air cylinder 2. Thereby, all the electric drills 20 move to the setting part 10 side at the same time, and each drill 22 projects into the setting part 10 while rotating through the through hole 12. Thereby, the clip hole 103 is formed in the weather strip 100 by the drill 22. At this time, the projecting amount of the drill 22 into the setting portion 10 is smaller than the total thickness of the seal portion 101 and the mounting portion 102. In the present embodiment, since the thickness of the seal portion 101 and the thickness of the partition 104 are the same, it is smaller than the total thickness of the partition 104 and the mounting portion 102. Therefore, the drill 22 penetrates the mounting portion 102 but does not penetrate the partition wall 104. Thereby, while the clip hole 103 is reliably pierced in the attachment portion 102, it is possible to prevent the seal portion 101 from being damaged.

  The drill residue D generated by drilling of the clip hole 103 by the drill 22 is discharged toward the outside of the set unit 10 (drill 22 side) because there is no escape place on the set unit 10 side. At this time, since the drill 22 has only one cutting blade 40, an escape route for the drilling residue D is sufficiently ensured, and the tip end surface 22d of the drill body 22a of the drill 22 is also inclined. Thus, the drill residue D is smoothly discharged out of the set portion 10 through the through hole 12 without remaining in the weather strip 100 and the drill 22. At this time, since the bottom surface of the through hole 12 is an inclined surface, the scum D is more smoothly discharged to the outside of the set portion 10. Therefore, after drilling the clip hole 103, there is no need to remove the drill residue D from the weather strip 100 or the drill 22.

  After a lapse of a predetermined time (about 0.1 to 1 second), the electric drill 20 and the holding pin 30 are automatically retreated to the neutral position by the air cylinders 2 and 42. As a result, one cycle of the work of piercing the clip hole 103 is completed. If the clip hole 103 can be pierced in the weather strip 100, the piercing device may be stopped, the weather strip 100 may be grasped by hand through the notch 11, and taken out from the set unit 10. After that, the above cycle is repeated.

  As described above, the representative embodiment of the present invention has been described, but the present invention is not limited to this, and various modifications can be made without departing from the gist of the present invention. For example, a weather strip without a partition 104 can be used. Even in this case, if the amount of projection of the drill 22 into the set portion 10 is set to be smaller than the total thickness of the seal portion 101 and the mounting portion 102, only the mounting portion 102 is provided without a hole in the seal portion 101. The clip hole 103 can be formed. On the other hand, in the case of the weather strip 100 having the partition wall 104, if the amount of projection of the drill 22 into the set portion 10 is set to be smaller than the total thickness of the seal portion 101, the mounting portion 102, and the partition wall 104, the seal portion The thickness may be larger than the total thickness of the mounting portion 101 and the mounting portion 102.

  The cutting blade 40 does not necessarily need to be provided. In this case, a weather strip previously cut to the final product dimensions may be set in the setting section 10 or a separate cutting step may be provided after the perforation processing. Further, the cutting blades 40 do not need to be provided at two places on both sides in the longitudinal direction of the setting section 10, and may be provided only in one of the longitudinal directions. In this case, the other end in the longitudinal direction of the weatherstrip preform 100 ′ needs to be properly positioned and provided in the set portion 10.

  As a drill used in the drilling device of the present invention, there is a problem of removing drilling residue, but not only the special drill of the present invention but also a conventionally known drilling drill can be used. Further, in the drill 22 of the present invention, it is preferable that a spiral groove extending in the axial direction is formed in the drill body 22a. Thereby, the escape route of the drill residue D is further secured.

  It is not always necessary to arrange a plurality of the electric drills 20 and the holding pins 30 in parallel, and it is sufficient that at least one electric drill 20 and the holding pins 30 are provided. In this case, a plurality of clip holes may be punched sequentially while moving the weather strip in the longitudinal direction. In this case, the base plate 23 and the connecting rod 31 are unnecessary.

  The means for holding the weatherstrip is not limited to the holding pins 30, but may be a long member for entirely pressing and holding the weatherstrip.

  The connecting rod 31 and the air cylinder 42 for operating the holding means are not necessarily provided at two places, but may be provided at one place at the longitudinal center of the connecting rod 31. Further, an air cylinder (advancing / retracting means) for the cutting blade 40 and an air cylinder (advancing / retracting means) for the holding means can be separately provided. In addition, each electric drill 20 can be moved forward and backward by an individual air cylinder without using the base plate 23.

  The bottom surface of the through hole 12 of the set portion 10 for discharging the slag D to the outside is not necessarily required to be an inclined surface, and may be a horizontal surface.

DESCRIPTION OF SYMBOLS 1 Base 2 Air cylinder 10 set part 11 Notch 12 Through hole 20 Electric drill 21 Drill driver 22 Drill 22a Drill main body part 22b Cutting blade 23 Base plate 24 Slide rail 26 Position adjustment rail 30 Holding pin 31 Connecting rod 35 Stopper 40 Cutting blade 41 Bracket 42 Air Cylinder 44 Rail 45 Pusher 100 Weather Strip 100 'Weather Strip Preliminary Body 101 Seal Part 102 Mounting Part 103 Clip Hole 104 Partition Wall 110 Clip 120 Body D Drilling Dust

Claims (19)

A drill used for attaching to a periphery of a door opening of an automobile, in a weather strip disposed via a clip, when drilling a clip hole by the drill means,
A drill for drilling a clip hole of a weather strip, wherein one cutting edge protrudes from a peripheral edge of a tip portion. A clip hole punching device for punching a clip hole in a weather strip disposed via a clip to a periphery of a door opening of an automobile,
A setting section for setting a weather strip,
Drill means for drilling a clip hole in the weather strip;
Holding means for holding the weather strip set in the setting portion,
With
The set portion is formed as a groove-shaped concave space that can receive and accommodate a weather strip,
The drill means is provided so as to be able to advance and retreat inside and outside the set portion,
The holding means is provided so as to be able to advance and retreat inside and outside the set part at a position opposite to the drill means with the set part interposed therebetween,
In a neutral state before drilling the clip hole, the drilling means and the holding means are located outside the set portion,
When a weather strip is set on the set portion and a clip hole is punched, the holding means projects into the setting section and presses and holds the weather strip so as to crush the weather strip, and then the clip hole is drilled by the drill means. A clip hole punching device configured to: A plurality of the drill means are arranged side by side along a longitudinal direction of the set portion,
The clip hole punching device according to claim 2, wherein the holding means is a plurality of holding pins arranged in parallel corresponding to the drill means. Each of the drill means is provided on a single base plate capable of moving forward and backward with respect to the set portion, and all the drill means move forward and backward at the same time,
The clip hole punching device according to claim 3, wherein the holding units are connected to each other by a connecting rod, and all the holding units also advance and retreat at the same time. Furthermore, a cutting blade for cutting the weather strip set in the setting section is provided,
The cutting blade is provided so as to be able to move in and out of the set section,
In the setting part, a weather strip preliminary body that has been preliminarily cut into a rough length through extrusion molding is set, and when drilling a clip hole, the weather strip preliminary body is reduced to a length dimension of a final product by the cutting blade. The clip hole punching device according to any one of claims 2 to 4, which is cut. The cutting blade is moved forward and backward by the forward and backward means,
When the cutting blade is projected into the set portion by the advance / retreat means, the connecting rod is also pressed by the advance / retreat means, so that the cutting blade and the holding means simultaneously project into the set portion, 6. The clip hole punching device according to claim 5, wherein the cutting blade and the holding means are also used for forward and backward operations. The cutting blade and the advancing and retreating means for moving the cutting blade forward and backward are provided at two places on both longitudinal sides of the set portion,
The clip hole punching device according to claim 6, wherein the connecting rod is pressed from both sides in the longitudinal direction by the two-way retreating means. The drill means is capable of moving in and out of the set portion through a through hole provided in a side wall of the set portion,
The clip hole punching device according to any one of claims 2 to 7, wherein a bottom surface of the through hole is an inclined surface inclined downward from the inside to the outside of the set portion.   9. The clip hole drilling device according to claim 2, wherein the drill attached to the drill means is the clip hole drill according to claim 1. The weather strip has a hollow cylindrical seal portion and a mounting portion to which the clip is attached,
The clip hole punching device according to any one of claims 2 to 9, wherein an amount of projection of the drill into the set portion is smaller than a total thickness of the seal portion and the attachment portion. A clip hole drilling method for drilling a clip hole in a weather strip disposed on a periphery of a door opening of an automobile via a clip,
Drill means for drilling a clip hole in the weather strip with a set part formed as a groove-shaped concave space capable of receiving and containing the weather strip, and holding means for holding the weather strip set in the set part. , Facing each other,
In a neutral state before drilling the clip hole, the drilling means and the holding means are located outside the set portion,
When the weather strip is set on the set portion and the clip hole is punched, the holding means projects into the set section and presses and holds the weather strip so as to crush the weather strip, and then the drill means drills the clip hole. , Clip hole drilling method. A plurality of the drill means are provided side by side along the longitudinal direction of the weather strip,
The clip hole drilling method according to claim 11, wherein the holding means is a plurality of holding pins arranged in parallel corresponding to the drill means. Each of the drill means is provided on a single base plate capable of moving forward and backward with respect to the set portion, and all the drill means move forward and backward with respect to the set portion simultaneously,
13. The clip hole drilling method according to claim 12, wherein the holding means are connected to each other by a connecting rod, and all the holding means advance and retreat at the same time with respect to the set portion. Further, in order to cut the weather strip set in the setting portion, a cutting blade is provided that can move in and out of the setting portion,
In the setting part, a weather strip preliminary body that has been preliminarily cut to a rough length through extrusion molding is set, and when drilling a clip hole, the weather strip preliminary body is cut into the length dimension of the final product by the cutting blade. The clip hole punching method according to claim 11, wherein the clip hole is cut. The cutting blade is moved forward and backward by forward and backward means,
The holding member is constantly biased toward the outside of the set portion by a spring,
When the cutting blade is projected into the set section by the advance / retreat means, the connecting rod is also pressed by the advance / retreat means, so that the cutting blade and the holding means simultaneously project into the set section. The clip hole drilling method according to claim 14, wherein the cutting blade and the holding unit are operated in both directions. The cutting blade and the advance / retreat means for moving the cutting blade forward / backward are provided at two locations on both sides in the longitudinal direction of the setting section,
The clip hole drilling method according to claim 15, wherein the connecting rod is pressed from both sides in the longitudinal direction by the two-way moving means. The drill means is capable of moving in and out of the set portion through a through hole provided in a side wall of the set portion,
The clip hole drilling method according to any one of claims 11 to 16, wherein a bottom surface of the through hole is a slope inclined downward from the inside to the outside of the set portion.   The clip hole drilling method according to any one of claims 11 to 17, wherein the drill attached to the drill means is the drill for clip hole drilling according to claim 1. The weather strip has a hollow cylindrical seal portion and a mounting portion to which the clip is attached,
19. The clip hole drilling method according to claim 11, wherein an amount of projection of the drill into the set portion is smaller than a total thickness of the seal portion and the attachment portion.

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