JP6742897B2 - Drill for clip hole drilling of weather strip, clip hole drilling device, and clip hole drilling method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clip hole piercing drill used when piercing a clip hole in a weather strip, a clip hole piercing device and a clip hole piercing method for piercing a clip hole in a weather strip.

As shown in FIG. 1, a weather strip 100 arranged at the periphery of a door opening of an automobile integrally has a hollow seal portion 101 having a hollow cylindrical shape and a mounting portion 102 having a flat plate shape. ), 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 is extruded into a predetermined shape as shown in FIG. 1A, and then, as shown in FIG. 1B, a clip hole 103 for mounting a clip 110. Is manufactured through a step of piercing the mounting portion 102.

Here, the clip hole is generally formed with an electric drill in many cases. As a drill for drilling (drill bit) used in electric drills, the radial center of the drill tip is typically sharp, and multiple pieces are cut outward from this radial center. A twist drill in which the blade extends radially (herein referred to as "center blade drill" for convenience of description) can be mentioned.

However, such a center blade drill is mainly suitable for relatively rigid materials such as wood and metal, and is not suitable for processing soft materials such as rubber and elastomer. In other words, the center-blade drill is the principle of drilling holes while shaving the processing object from the center to the outside as it rotates, so using this for a soft material will cause the peripheral part to be rolled up and create a hole with a clean shape. It's hard to do. Further, when a clip hole is drilled with an electric drill, the occurrence of drilling slag is unavoidable, which causes a processing problem.

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

JP, 2000-118323, A

In Patent Document 1, since the clip holes and the like are perforated by melting a part of the weather strip, no perforated slag is generated. However, it is difficult to strictly control the size and shape of the hole in the melt perforation. In addition, since the heat is used, the running cost increases. Moreover, there is no particular mention of a device or method for efficiently drilling a plurality of holes.

Therefore, it is desirable that the clip hole is also drilled by an electric drill. However, the shape of the hole is a problem as described above in the center blade drill which is a principle of excavating the hole. In order to solve this, it is conceivable to use a drill having a cutting edge formed at the tip peripheral edge (herein, for convenience of description, a center edge drill is referred to as a “peripheral edge drill”).

Since the peripheral edge drill rotates on the outer peripheral edge of the hole to be drilled and hollows the hole, a hole of a desired size can be drilled neatly. As such a peripheral edge drill, conventionally, there are a punch blade type in which the entire peripheral edge of the drill is a cutting edge, and a multiple blade type in which a plurality of cutting edges are formed to project along the peripheral edge of the drill tip. ..

However, when a clip hole is punched with a punch blade type peripheral blade drill, a drill residue remains in the hollow space of the drill surrounded by the peripheral blade. This is very complicated because it is necessary to remove the drilling residue from the drill for each drilling in order to continuously drill a plurality of clip holes, which is not suitable for practical continuous machining.

On the other hand, in the multi-blade type peripheral edge drill, since the entire circumference is not surrounded by the cutting edge, the drilling residue does not remain on the drill side. However, a plurality of cutting edges block the escape area of the slag during drilling, so that the slag remains in the clip hole after 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-described problems, and a drill for drilling a clip hole of a weather strip that does not require removal work of a drilling residue, a clip hole drilling device and a clip hole drilling device that can efficiently drill a plurality of clip holes. The purpose is to provide a method.

The present invention employs the following means as means for that purpose.
[1] A drill which is used for attaching to a drilling means for drilling a clip hole in a weather strip arranged via a clip to the periphery of a door opening of an automobile,
A drill for drilling a clip hole of a weather strip, in which one cutting edge is formed to project at the peripheral edge of the tip portion.
[2] A clip hole punching device for punching a clip hole on a weather strip arranged via a clip to the periphery of a door opening of an automobile,
A set part to set the weather strip,
Drill means for drilling a clip hole in the weather strip,
Holding means for holding the weather strip set in the setting section,
Equipped with
The set portion is formed as a groove-shaped concave space capable of receiving and accommodating a weather strip,
The drill means is provided so as to be able to advance and retract inside and outside the setting section,
The holding means is provided so as to be capable of advancing and retreating in and out of the setting portion at a position opposite to the drill means with the setting portion interposed therebetween.
In the neutral state before drilling the clip hole, the drill means and the holding means are located outside the setting portion,
When the weather strip is set in the setting portion and the clip hole is punched, the holding means projects into the setting portion and presses and holds the weather strip so as to be crushed, and then the clip means is punched the clip hole. A clip hole punching device configured to.
[3] A plurality of the drill means are arranged in parallel along the longitudinal direction of the setting part,
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 that can move forward and backward with respect to the setting portion, and all the drill means move forward and backward simultaneously,
The clip hole punching device according to [3], wherein the holding means are connected to each other by a connecting rod, and all the holding means also move forward and backward simultaneously.
[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 inside and outside of the setting unit,
In the setting part, a weatherstrip preliminary body preliminarily cut to a rough length through extrusion molding is set, and when punching a clip hole, the weatherstrip preliminary body is adjusted to the length dimension of the 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 back and forth by a forward and backward means,
When the cutting blade is projected into the setting section by the advancing and retracting means, the connecting rod is also pressed by the advancing and retracting means, so that the cutting blade and the holding means project into the setting section at the same time. The clip hole punching device according to [5], wherein the cutting blade and the holding means are both used for advancing and retracting operations.
[7] The cutting blade and the advancing/retreating means for advancing/retreating the cutting blade are provided at two positions on both sides in the longitudinal direction of the setting portion,
The clip hole punching device according to [6], wherein the connecting rod is pressed from both sides in the longitudinal direction by the bidirectional movement means.
[8] The drill means is capable of advancing and retracting 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 [2] to [7], wherein the bottom surface of the through hole is an inclined surface that is inclined downward from the inside to the outside of the setting portion.
[9] The clip hole punching device according to any of [2] to [8], wherein the drill mounted on the drill means is the clip hole drilling drill according to [1].
[10] The weather strip has a hollow tubular seal portion and a mounting portion to which a clip is attached,
The clip hole punching device according to any one of [2] to [9], wherein the amount of protrusion of the drill into the setting portion is smaller than the total thickness of the seal portion and the mounting portion.
[11] A clip hole punching method for punching a clip hole in a weather strip arranged via a clip on the periphery of a door opening of an automobile,
A drill means for punching a clip hole in the weather strip, and a holding means for holding the weather strip set in the setting portion, sandwiching the setting portion formed as a groove-shaped concave space capable of receiving and accommodating the weather strip. , Facing each other,
In the neutral state before drilling the clip hole, the drill means and the holding means are located outside the setting portion,
When the weather strip is set in the setting part and the clip hole is punched, the holding means projects into the setting part and presses and holds the weather strip so as to be crushed, and then the clip means is used to punch the clip hole. , Clip hole drilling method.
[12] A plurality of the drill means are arranged in parallel along the longitudinal direction of the weather strip,
The clip hole punching 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 that can advance and retreat with respect to the setting section, and all the drill means move forward and backward with respect to the setting section at the same time.
The clip hole punching method according to [12], wherein the respective holding means are connected to each other by a connecting rod, and all the holding means also move forward and backward with respect to the setting part at the same time.
[14] Further, in order to cut the weather strip set in the setting section, a cutting blade capable of advancing and retracting in and out of the setting section is provided,
In the setting part, a weatherstrip preliminary body preliminarily cut to a rough length through extrusion molding is set, and when the clip hole is punched, the weatherstrip preliminary body is made to have a length dimension of a final product by the cutting blade. The clip hole punching method according to any one of [11] to [13], which comprises cutting.
[15] The cutting blade is moved back and forth by a back and forth means,
The holding member is constantly urged toward the outside of the set portion by a spring,
When the cutting blade is projected into the setting section by the advancing and retracting means, the connecting rod is also pressed by the advancing and retracting means so that the cutting blade and the holding means project into the setting section at the same time. The clip hole punching method according to [14], wherein the cutting blade and the holding means are also used for advancing and retracting operations.
[16] The cutting blade and the advancing/retreating means for advancing/retreating the cutting blade are provided at two locations on both sides in the longitudinal direction of the setting section,
The clip hole punching method according to [15], wherein the connecting rod is pressed from both sides in the longitudinal direction by the bidirectional moving means.
[17] The drill means can be moved in and out of the set portion through a through hole provided in a side wall of the set portion.
The clip hole punching method according to any one of [11] to [16], wherein the bottom surface of the through hole is an inclined surface that is inclined downward from the inner side to the outer side of the setting portion.
[18] The clip hole drilling method according to any one of [11] to [17], wherein the drill mounted on the drill means is the clip hole drilling drill according to [1].
[19] The weather strip has a hollow cylindrical seal portion and a mounting portion to which a clip is attached,
The clip hole punching method according to any one of [11] to [18], wherein an amount of protrusion of the drill into the setting portion is smaller than a total thickness of the seal portion and the attachment portion.

Since the drill for drilling clip holes of the present invention is a kind of so-called peripheral edge drills, it clearly drills clip holes of a predetermined size as compared with conventional center blade drills and drills by heat melting as drills for drilling. can do. The diameter of the clip hole can be easily designed by the outer diameter of the drill. Moreover, since the drill for drilling a clip hole of the present invention has only one cutting edge, no drill residue remains on the drill side after drilling. Further, since the escape area of the drilling slag is not blocked during drilling, the drilling slag does not remain in the clip hole after drilling. Thus, if the clip holes are drilled by the drill for drilling clip holes of the present invention, it is not necessary to remove the drill dust after drilling, and the productivity can be greatly improved. Further, in the conventional center blade drill, in order to secure a positive escape path for the drilling slag, a spiral groove extending in the axial direction is essential on the outer peripheral surface of the drill body (so-called twist drill), The spiral groove is not always necessary in the drill for drilling a clip hole of the present invention.

Further, in the clip hole punching device and the clip punching method of the present invention, since the drill means and the holding means are located outside the set portion in the neutral state before the clip hole is punched, the weather strip can be easily and smoothly moved into the set portion. Can be set to. When the weather strip is set in the setting part and the clip hole is punched, the holding means projects into the setting part and presses and holds the weather strip so that the weather strip is crushed and then the clip hole is punched. Can be perforated.

It is necessary to finally drill a plurality of clip holes along the longitudinal direction in the weather strip. Therefore, if a plurality of drill means are arranged in parallel along the longitudinal direction of the set portion, a plurality of clip holes can be simultaneously drilled, and the productivity is improved.

If the holding means is a plurality of holding pins juxtaposed in correspondence with the drill means, the portion for punching the clip hole is surely pressed and held while the other portions are not pressed, so that the minimum pressing force is required. In addition, the running cost can be reduced as compared with the case where the weather strip is entirely pressed.

If all the drill means and the holding means are moved back and forth at the same time, the production processing time can be shortened. Further, since all of them move forward and backward at the same time, it is not necessary to individually control the forward and backward movements of the individual drill means and the holding means. Therefore, it is easy to control and it is possible to avoid variations in each clip hole. ..

If it is possible to cut the weather strip into the length dimension of the final product at the same time as drilling the clip holes with the cutting blade that cuts the weather strip, it is possible to separately cut the weather strip into the length dimension of the final product before or after the punching process. Since it can be omitted, productivity is improved.

If the advancing/retreating means is also used for the advancing/retreating operation of the cutting blade and the holding means, it is not necessary to separately provide the advancing/retreating means for the cutting blade and the advancing/retreating means for the holding means, so that the device can be made compact and the number of parts and The cost can be reduced.

If the cutting blade is provided on only one of the longitudinal sides of the set part, set the other side of the weatherstrip spare body in the longitudinal direction properly to cut the final length dimension with the cutting blade. It is necessary to set it in the department. In this case, if the set position of the weatherstrip preliminary body is slightly deviated, 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 preliminary body is not limited, so that no dimensional error occurs and the setting work can be performed easily.

Further, since the connecting rod connecting the holding means is long, if it is pressed from only one side portion in the longitudinal direction, the other side portion may be stuck and may not move back and forth smoothly with respect to the setting portion. On the other hand, if the connecting rod is pressed from both sides in the longitudinal direction by the advancing/retreating means, the movement of the connecting rod is stable, and the connecting rod can be smoothly advanced/retreated with respect to the setting part.

If the drill means can be moved in and out with respect to the set part through the through hole provided in the side wall of the set part, and if the bottom surface of the through hole is an inclined surface, the drilling sludge generated by the drilling can be smoothed. Can be discharged outside the set section.

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

When drilling a clip hole in an ether strip having a seal part and a mounting part, if the amount of protrusion of the drill into the set part is set to be smaller than the total thickness of the seal part and the mounting part, the hole will be formed in the seal part. You can avoid emptying.

It is sectional drawing which shows the manufacturing process of a weather strip. It is a top view of a punching device in a neutral state. It is a side view of a punching device in a neutral state. It is a front view and a side view of a drill. It is a top view of a punching device in an initial operating state. It is a side sectional view of a punching device in an initial operating state. It is a principal part enlarged view of the state of FIG. It is a top view of the punching device in the state where the weather strip was cut and held. FIG. 6 is an enlarged side sectional view of a main part of the punching device in a state where the weather strip is cut and held. It is a top view of a punching device in a punching state. It is a principal part expanded side sectional view of the punching apparatus in a punching state.

First, the weather strip to be punched will be described. As shown in FIG. 1, the weather strip 100 is a long member arranged around the periphery of a door opening of an automobile. As shown in FIG. 1, a hollow cylindrical hollow seal portion 101 and a flat plate-shaped mounting portion 102 are integrally formed. 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. 1(a), as shown in FIG. 1(b), a clip hole for mounting a clip 110 is attached. It is manufactured through a process of punching 103 in the mounting portion 102. Further, in the weather strip 100 of the present embodiment, the mounting portion 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 of the clip 110 are separated from each other. The hollow seal portion 101 and the partition 104 have the same thickness (1.3 mm in this embodiment). In addition, the thickness of the mounting portion 102 in this embodiment is 2.0 mm.

Next, 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 portion 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 and a holding pin 30 for holding the weather strip set in the setting unit 10 are provided. 2 and 3 show a neutral state before punching the clip hole, and the weather strip preliminary body 100' described later is set in the setting portion 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 setting portion 10 is formed as a groove-shaped concave space extending in the longitudinal direction in the center of the upper surface width direction of a metal-made long rectangular parallelepiped, and receives and accommodates the weather strip (and the weather strip preliminary body 100 ′). It is possible. Therefore, the length (longitudinal dimension) of the setting portion 10 is larger than that of the weather strip (and the weather strip preliminary body 100'). On the other hand, the width dimension of the setting portion 10 is almost the same as the width of the weather strip (and the weather strip preliminary body 100') in the natural state. Two notches 11 are formed on both side walls of the set portion 10. As a result, the weather strip 100 after the perforation process can be easily grasped by hand in the notch 11 and taken out from the setting unit 10.

In the electric drill 20, a commercially available drill driver 21 is detachably attached with a drill (drill bit) 22 for drilling. A plurality of electric drills 20 are arranged in parallel along the longitudinal direction of the setting unit 10. The number of electric drills 20 installed is the same as the number of clip holes 103 drilled in the weather strip 100. Each electric drill 20 is installed on one base plate 23, and is driven by electric power supplied 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 of approaching and separating from the setting section 10. As a result, all the electric drills 20 can move forward and backward simultaneously with respect to the setting unit 10. 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 the direction in which the base plate 23 approaches the setting unit 10. As a result, the drill 22 of each electric drill 20 enters the set portion 10 through the through hole 12 provided in one sidewall of the set portion 10 (see FIGS. 10 and 11). The bottom surface of the through hole 12 is an inclined surface that is inclined downward from the inside to the outside of the setting 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 adjusting rail 26 provided on the base plate 23 in parallel with the longitudinal direction of the setting unit 10. As a result, the left and right positions of the electric drills 20 can be adjusted by sliding the brackets 25 on the position adjusting rails 26. The brackets 25 are usually fixed to the position adjusting rails 26 by screws 27 to prevent the electric drill 20 from being displaced during drilling. 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 attached to the electric drill 20 is a special drill (drill bit) for forming the clip hole 103 in the weather strip 100. Specifically, as shown in FIG. 4, one cutting edge 22b is formed on the peripheral edge of the tip of the drill body 22a so as to project toward the tip. Reference numeral 22c is a shank portion attached to the drill driver 21. As shown in FIG. 4A, the cutting edge 22b is an isosceles triangle in a front view, and both sides thereof are blades. Further, as shown in FIG. 4B, the cutting edge 22b is gradually thinned from the base end portion to the tip end. As a result, the rigidity of the cutting edge 22b is secured at the base end portion and the sharp cutting edge is secured at the tip end portion.

The diameter of the drill main body 22a and the diameter of the rotation locus of the cutting edge 22b are the same. Therefore, the diameter of the clip hole 103 can be designed according to 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 protruding length of the cutting edge 22b is 5.5 mm. The tip surface 22d of the drill body 22a is a tapered surface that is inclined toward the base end side. As a result, the escape path for the drilling slag during drilling is expanded, and the drilling slag can be discharged more smoothly to the outside.

Further, the protruding length of the cutting edge 22b is preferably 1.5 to 4 times, and 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, the escape path for the perforated slag becomes small, and the perforated slag may not be discharged smoothly to the outside. On the other hand, as will be described later, the clip hole 103 is drilled at the tip of the cutting edge 22b. Therefore, when the protruding length of the cutting edge 22b exceeds four times the thickness of the mounting portion 102, the strength is reduced. The possibility that the cutting edge 22b will be damaged during the selection is increased.

The holding pin 30 is provided on the opposite side of the electric drill 20 sandwiching the setting unit 10 so as to be able to move in and out with respect to the setting unit 10. A plurality of holding pins 30 are also arranged side by side along the longitudinal direction of the setting portion 10. The number of holding pins 30 installed is the number corresponding to the electric drill 20, and the same number as the clip holes 103 drilled in the weather strip 100. Each holding pin 30 is in 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 the coil springs 32 provided around two bolts 33 on the left and right, which are screwed and fixed to the other side wall of the setting portion 10. That is, the neutral position of the connecting rod 31 is a position where the biasing force is not generated in the coil spring 32, and the position is separated 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 back and forth around the bolt 33 as an axis.

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

A cutting blade 40 for cutting the weather strip 100 (to be exact, a weather strip preliminary body 100 ′ as described later) set in the setting portion 10 is provided on the outer side in the longitudinal direction of the connecting rod 31. Two cutting blades 40 are provided 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 dimension of the weather strip 100 as the final product. Both cutting blades 40 are fixed to the air cylinder 42 via brackets 41, respectively. As a result, the cutting blade 40 can be moved in and out of the set portion 10 by the air cylinder 42. The air cylinder 42 corresponds to the advancing/retreating means of the present invention.

The air cylinder 42 is also installed on the 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. A rail 44 is provided on the pedestal 43 for stabilizing the forward and backward movement of the bracket 41 and the cutting blade 40. The lower part of the bracket 41 is slidably fitted on the rail 44. Reference numeral 45 is 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 it is preferable that the base 1 is inclined at 30° to 60° with respect to the horizontal. When the base 1 is horizontal or vertical, it becomes difficult to put the weather strip 100 in and out of the setting section 10. Further, if the base 1 is vertical, it becomes difficult for the perforated slag to be smoothly discharged to the outside.

Next, a procedure (drilling method) for punching the clip hole 103 in the weather strip 100 will be described. First, as shown in FIGS. 1 and 2, the weather strip extruded into a predetermined shape is set in the setting unit 10 in the neutral state of the punching device. Specifically, the mounting portion 102, which is a portion where the clip hole 103 is drilled, is set toward the electric drill 20 side. At this time, the weather strip preliminary body 100' preliminarily cut into a rough length through extrusion molding may be set in the setting section 10. Therefore, it is not necessary to purposely cut into the length dimension of the final product before drilling. Further, it is not necessary to strictly perform alignment in the longitudinal direction within the setting unit 10.

As well shown in FIGS. 7 and 9, the bottom surface of the setting portion 10 is formed in a shape corresponding to the outer shape of the weather strip 100 (and the weather strip preliminary body 100 ′). As a result, the weather strip preliminary body 100 ′ can be stably set on the setting unit 10. When the drilled state is in the neutral state, the drill 22 and the holding pin 30 are located outside the setting unit 10.

After the weather strip preliminary body 100' can be set in the setting unit 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 projected and moved toward the setting portion 10 by the air cylinder 42. Then, the left and right pushers 45 come into contact with both side portions in the longitudinal direction of the connecting rod 31. At the same time, the cutting blade 40 comes into contact with the weatherstrip preliminary body 100'.

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

At the same time, the connecting rod 31 is pressed against the biasing force of the coil spring 32 by the pusher 45, and all the holding pins 30 project into the setting portion 10 at the same time. 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 connecting rod 31 comes into contact with the stopper 35, whereby the protrusion limit of the holding pin 30 and the cutting blade 40 is regulated. Since both sides of the connecting rod 31 in the longitudinal direction are pressed at the same time, the connecting rod 31 and thus each holding pin 30 are stably projected and moved. In other words, the air cylinder 42 also serves to move the cutting blade 40 and the holding pin 30 forward and backward.

Subsequently, as shown in FIGS. 10 and 11, the base plate 23 is moved to the setting portion 10 side by the air cylinder 2. As a result, all the electric drills 20 simultaneously move to the setting unit 10 side, and the drills 22 project into the setting unit 10 while rotating through the through holes 12. As a result, the clip hole 103 is formed in the weather strip 100 by the drill 22. At this time, the amount of protrusion 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 seal portion 101 and the partition wall 104 have the same thickness, they are smaller than the total thickness of the partition wall 104 and the mounting portion 102. Therefore, the drill 22 penetrates the mounting portion 102, but does not penetrate the partition wall 104. As a result, it is possible to surely form the clip hole 103 in the mounting portion 102 and prevent the seal portion 101 from being damaged.

The slag D generated when the clip hole 103 is pierced by the drill 22 has no escape on the setting part 10 side, and is discharged toward the outside of the setting part 10 (drill 22 side). At this time, since the drill 22 has only one cutting blade 40, the escape path for the drilling slag D is sufficiently secured, and the tip surface 22d of the drill body 22a of the drill 22 is also an inclined surface. Then, the perforated slag D does not remain on the weather strip 100 or the drill 22 and is smoothly discharged to the outside of the setting unit 10 through the through hole 12. At this time, since the bottom surface of the through hole 12 is an inclined surface, the perforated slag D is more smoothly discharged out of the setting unit 10. Therefore, it is not necessary to remove the drilling waste D from the weather strip 100 or the drill 22 after drilling the clip holes 103.

The electric drill 20 and the holding pin 30 are automatically retracted to the neutral position by the air cylinders 2 and 42 after a predetermined time (about 0.1 to 1 second) has elapsed. This completes one cycle of the drilling operation for the clip hole 103. If the clip hole 103 can be punched in the weather strip 100, the punching device may be stopped, the weather strip 100 may be manually grasped through the notch 11 and taken out from the setting section 10. After that, the above cycle is repeated.

The representative embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention. For example, as the weather strip, one without the partition 104 can be applied. Even in this case, if the projection amount of the drill 22 into the setting 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 can be formed without forming a hole in the seal portion 101. The clip hole 103 can be drilled. On the other hand, in the case of the weather strip 100 having the partition wall 104, if the projection amount of the drill 22 into the setting portion 10 is set 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 101 and the mounting portion 102.

The cutting blade 40 does not necessarily have to be provided. In this case, a weather strip previously cut to the final product size may be set in the setting unit 10, or a separate cutting step may be provided after perforation processing. Further, the cutting blades 40 do not have to be provided at two positions 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 of the weatherstrip preliminary body 100 ′ in the longitudinal direction needs to be properly positioned and provided in the setting portion 10.

As the drill used in the drilling device of the present invention, although the problem of removing the drilling sludge occurs, not only the special drill of the present invention but also a conventionally known drill can be used. Further, in the drill 22 of the present invention, it is also preferable to form a spiral groove extending in the axial direction in the drill body portion 22a. As a result, the escape route for the perforated slag D is further secured.

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

The holding means for holding the weather strip is not limited to the holding pin 30, and may be a long member that presses and holds the weather strip as a whole.

The air cylinders 42 for advancing and retracting the connecting rod 31 and the holding means do not necessarily have to be provided at two places, but may be provided at one place at the central portion in the longitudinal direction of the connecting rod 31. Further, an air cylinder (advancing and retracting means) for the cutting blade 40 and an air cylinder (advancing and retracting means) for the holding means can be provided separately. Further, without using the base plate 23, each electric drill 20 can be moved forward and backward by an individual air cylinder.

The bottom surface of the through hole 12 of the setting unit 10 that discharges the slag D to the outside does not necessarily have to be an inclined surface, and may be a horizontal surface.

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 22b Cutting Edge 23 Base Plate 24 Slide Rail 26 Position Adjusting Rail 30 Holding Pin 31 Connecting Rod 35 Stopper 40 Cutting Edge 41 bracket 42 air cylinder 44 rail 45 pusher 100 weather strip 100' weather strip spare body 101 seal portion 102 mounting portion 103 clip hole 104 partition wall 110 clip 120 vehicle body D drilling residue

Claims (4)

A drill used to be mounted on the drill means when drilling a clip hole in a weather strip arranged via a clip to the periphery of a door opening of an automobile,
Only one cutting edge protruding toward the tip direction of the drill main body is formed on the peripheral edge of the distal end of the drill main body along a part of the peripheral edge of the drill main body, and rotates along the outer peripheral edge of the hole to be drilled. and a shall be drilled holes on the principle boring a hole,
The cutting edge, said has a sides is blade in the direction along the periphery of the drill main body, and Ru isosceles der in front view, a clip hole drilling drill weatherstrip. A drill for drilling clip holes in a weather strip according to claim 1 ,
The cutting edge is gradually thinned from its base end portion to its tip portion, and a hole is formed at this tip portion.
Drill for drilling clip holes in weather strips. A drill for clip hole drilling of a weather strip according to claim 1 or 2 ,
The diameter of the drill body is the same as the diameter of the locus of rotation of the cutting edge,
Drill for drilling clip holes in weather strips. A drill for drilling a clip hole of a weather strip according to any one of claims 1 to 3 ,
The tip surface of the drill body is a surface inclined toward the base end side of the cutting edge,
Drill for drilling clip holes in weather strips.

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