JP5988482B2 - Drilling device having a cylindrical drilling blade - Google Patents

Description

  The present invention relates to a perforating apparatus that perforates a paper, a resin film, a metal foil, or a laminate of these (hereinafter collectively referred to as “perforated object”) with a perforating blade. About.

  2. Description of the Related Art Conventionally, a perforating apparatus that performs perforation by bringing a perforating blade into contact with the above-described object to be perforated has been used. As such a drilling device, for example, there are a device using a magnetic force of a solenoid (Patent Document 1) and a device using a cam mechanism (Patent Document 2), and these drilling blades rotate around their own axes. This is a method (hereinafter referred to as “single-acting type”) in which the object is perforated without being touched. In addition, there are those using two types of gear mechanisms (Patent Document 3) and those using a crank mechanism having a single spiral groove and a pin engaged therewith (Patent Document 4). This is a method in which the blade rotates (rotates) around its own axis while making contact with the object to be drilled (hereinafter referred to as “spinning type”). From the viewpoint of reducing the punching resistance, the rotation type in which the punched object is punched while being cut by the rotating blade edge is more advantageous than the single-acting type in which the punched object is punched while biting the edge of the drilled object.

  Further, in the above-described perforating apparatus, a perforating blade (hereinafter referred to as “solid blade”) formed in a solid columnar shape or a perforated blade formed in a hollow cylindrical shape (hereinafter referred to as “hollow blade”). ) Is used. Since these drilling blades receive a drag force from an object to be drilled at the time of drilling, the mechanical strength against the axial load and circumferential load of the drilling blade becomes a problem. If the outer diameter is the same, the solid blade is superior. However, from the viewpoint of material yield, processing man-hours, or lead time, a hollow blade that can be produced exclusively by outer peripheral cutting of a hollow pipe is more advantageous than a solid blade that cuts an outer shape exclusively from a steel bar for cutting tools. Also, from the viewpoint of reducing the perforation resistance, the blade tip portion that is thin because it is solid is more hollow than the solid blade that punches while pressing the object to be punched, so that the blade tip portion that is thin is thin. A hollow blade that is punched while biting into an object is advantageous.

  An example of the hollow blade disclosed in Patent Document 5 is shown in FIG. This hollow blade is formed by sharpening one end edge of the cylindrical sleeve 110 to form an inclined blade edge 112 (one pointed blade), and receives a drag force during drilling in the cylindrical surface of the sleeve 110. it is conceivable that. Both ends of the sheet metal bent into a cylindrical shape have a structure such that a gap 115 can be formed in the longitudinal direction (axial direction), and an annular rib 113 is formed on the outer periphery of the sleeve 110. A gap 115 is formed when the diameter of the sleeve 110 is expanded due to the wedge effect during drilling, and the gap 115 of the sleeve 110 is closed by pressing of the rib 113 to reduce friction between the outer peripheral surface of the sleeve 110 and the drilled object. As a result, it is described that the hollow blade pierced into the drilled object can be easily pulled out.

  In addition, this hollow blade is made of sheet metal that can be produced by punching with a press machine, for example, without using a hollow pipe that cuts the outer periphery, etc., so that the production efficiency is better than using a hollow pipe, and the material and production cost are also reduced. It is advantageous. Furthermore, many thin metal plates circulate more than hollow pipes, and by using the thickness of the metal plate, a sharp thin blade can be formed, and a cutting edge having a good sharpness can be obtained.

JP 2000-301495 A JP 2000-141294 A JP 2006-943 A JP-A-5-138599 Special table 2009-505849

This inventor examined applying the technical idea of the sheet metal hollow blade disclosed in Patent Document 5 to a hollow blade having two or more pointed blades.
For example, a sheet metal hollow blade having two pointed blades at the blade edge portion may receive an uneven axial load (drag) from the drilled object against the blade edge during drilling. At this time, the hollow blade receives an axial load in the cylindrical surface of the sleeve, and the mechanical strength of the hollow blade is considered to be affected by the material, thickness (plate thickness), and length of the sleeve.

  In such a sheet metal hollow blade, if there is a gap in the longitudinal direction (axial direction) of the sleeve, it is easy to cause an axial displacement such that the two edges forming the gap are relatively displaced. . If this load is excessively larger than expected, one pointed blade is greatly displaced in the axial direction relative to the other pointed blade and plastically deformed and cannot be used as a drilling blade. Although it is possible to receive the axial load by supporting the end opposite to the blade edge of the sleeve, the mechanical strength of the sleeve decreases as the sleeve becomes longer. It does not stop and tends to cause overall deformation.

  Similarly, when a hollow blade having two or more pointed blades or wavy blades is used in a rotation type in which a large circumferential load is applied during drilling, the peripheral edge from the drilled object generated by rotation with respect to the blade edge A directional load is received in the cylindrical surface. This circumferential load makes it easier for one edge of the sheet metal that continues from the blade edge of the sleeve to be displaced so as to enlarge the gap. If this load is excessively larger than expected, the sleeve is plastically deformed and cannot be used as a drilling blade.

  Also, when there is a clear gap in the longitudinal direction (axial direction) of the sleeve, due to the reduced diameter of the sleeve, the drilling waste that has entered the inside of the sleeve (hollow part) is difficult to fall off, and the inside of the sleeve However, there is a possibility that the clogging due to the remaining drilling scraps becomes like a solid blade, and the drilling resistance increases.

  The present invention solves the above-described problems related to the sheet metal hollow blade disclosed in Patent Document 5, has high mechanical strength against axial loads and circumferential loads, and is applied to a single-acting or self-rotating drilling device. It is possible to obtain a hollow blade that can be configured as possible, is advantageous in terms of productivity and manufacturing cost, and has a good sharpness, thereby providing a drilling device having a lower punching resistance provided with this hollow blade.

  The present inventor has studied in detail the drilling mechanism using a hollow blade, and found a new configuration relating to combining the two edges of the metal plate abuttingly in bending and forming the metal plate into a cylindrical shape. The invention has been reached.

That is, the present invention is a perforating apparatus for perforating by bringing a cylindrical perforating blade into contact with an object to be perforated, wherein the cylindrical perforating blade includes a cylindrical portion formed by abutting two edges of a metal plate, A cutting edge portion formed at one end of the cylindrical portion in the axial direction, and the cylindrical portion is formed on one edge of the metal plate and on the other edge corresponding to the recessed portion. A cylindrical perforation in which the concave portion and the convex portion are combined in a cylindrical surface of the cylindrical portion, and a gap is provided between the concave portion and the convex portion. A perforating apparatus having a blade.

  In this invention, it is preferable that the said recessed part and the said convex part are dovetail joints. Moreover, it is preferable that the said blade edge part is formed in two or more pointed blades. Moreover, it can be set as the drilling blade by which the said blade edge | tip part is formed in the waved blade. In addition, a drilling apparatus is preferable in which the cylindrical drilling blade is rotated around the axis of the cylindrical drilling blade while making contact with an object to be drilled.

  According to the present invention, the mechanical strength against axial load and circumferential load is high, and it can be applied to a single-acting or rotating drilling device. Further, it is advantageous in terms of productivity and manufacturing cost, and has a good sharpness. A cylindrical drilling blade can be obtained. By providing this cylindrical piercing blade, it is possible to obtain a single-acting or self-rotating piercing device in which the piercing resistance at the time of piercing is reduced as compared with the prior art. In particular, by providing this cylindrical piercing blade in a rotary piercing device, the piercing resistance during drilling can be further reduced.

It is an external view of the specific example of the 1st form (single action type) of the punching apparatus of this invention. It is a block diagram showing the detailed structure of the punching apparatus shown in FIG. FIG. 2 is a perspective view of a perforation blade (a sheet metal hollow blade) provided in the perforation apparatus shown in FIG. 1. FIG. 4 is a front view of the drilling blade shown in FIG. 3. It is an external view of the specific example of the 2nd form (spinning type) of the punching apparatus of this invention. It is a block diagram showing the detailed structure of the punching apparatus shown in FIG. FIG. 6 is a perspective view of a perforation blade (a hollow blade made of sheet metal) included in the perforation apparatus shown in FIG. 5. It is a front view of the drilling blade shown in FIG. FIG. 10 is a front view of a drilling blade portion extracted from FIG. 9 of Patent Document 5.

The present invention relates to a perforating apparatus for perforating by bringing a cylindrical perforating blade into contact with an object to be perforated, and there is a technical feature in the configuration of the cylindrical perforating blade included in the perforating apparatus.
In the present invention, the cylindrical perforated blade has a cylindrical portion formed by butting two edges of the metal plate, and a blade edge portion formed at one end in the axial direction of the cylindrical portion. In forming the cylindrical portion, a concave portion formed on one edge of the metal plate and a convex portion formed on the other edge corresponding to the concave portion are provided. Are combined in the cylindrical surface of the cylindrical part to be formed.

  The combined structure of the concave portion and the convex portion for joining the two edges of the metal plate is an important technical idea in the present invention that is not recognized in the sheet metal hollow blade disclosed in Patent Document 5. Due to the combined structure of the concave and convex portions, the deformation of the sleeve can be effectively prevented. For example, even if an uneven axial load is applied to the cutting edge and the two edges of the metal plate are relatively displaced and try to move in the axial direction, the concave and convex portions in the cylindrical surface are Since they are combined with each other like parts, the above-described axial displacement can be reliably suppressed, and undesirable plastic deformation of the sleeve can be prevented.

  In addition, for example, when a large circumferential load is applied to the cutting edge and the gap on the side closer to the cutting edge is larger than that on the side far from the cutting edge, the corner of the convex portion Are in contact with the recesses and act so as to prevent the rotational movement in the cylindrical surface from each other, so that the deformation due to the diameter expansion of the cylindrical portion that is large enough to hinder the drilling can be suppressed. Regarding the mutual action of the concave and convex portions so as to prevent rotational movement in the circumferential surface, the circumferential load that closes the gap on the edge closer to the blade edge than the edge on the side far from the blade edge is applied. The same applies when receiving.

  In the present invention, the concave and convex portions described above are preferably selected in consideration of the load on the drilling blade and the use conditions, and are square, trapezoidal, inverted trapezoidal, T-shaped, jigsaw puzzle parts. Such a balloon shape, a bowl shape, a semicircular shape, a semi-elliptical shape, or a triangular shape can be used. Even in such a shape, by forming the convex portion corresponding to the concave portion, the concave portion and the convex portion can prevent each other from axial displacement within the cylindrical surface, and also prevent rotational movement within the circumferential surface. So that each other can act.

  In addition, if the combination part of the concave part and the convex part and the joint part of the two edges of the metal plate are structured so that the sleeve can be elastically deformed so as not to interfere with perforation, the flexibility of the metal plate can be improved. It is preferable because it can be used more effectively. For example, it is easy to provide an appropriate gap between the concave portion and the convex portion, and not to fix the butt portion by welding or adhesion. Further, the concave portion and the convex portion can be combined with an intermediate fit or an interference fit, and the mechanical strength against the diameter expansion or contraction of the sleeve can be increased.

Hereinafter, an example of the cylindrical perforation blade in the present invention will be specifically described and described in detail.
The perforating blade 11 shown in FIG. 3 (perspective view) and FIG. 4 (front view) is a hollow blade made of a metal plate, and is formed by bending a metal plate punched into a predetermined shape by a press device into a cylindrical shape. A sleeve 11a (cylindrical portion) is formed. Further, one end of the sleeve 11a in the longitudinal direction (axial direction) is formed at the blade edge portion, and has two sharp blade edges 11b (pointed blades). The cutting edge portion may be a single pointed blade or a wavy blade.

  For example, in the case of having two cutting edges 11b, if the butted portion 11f is made to correspond to the position of the valley bottom formed by the two cutting edges 11b, it is easy to avoid catching the edge of the metal plate during drilling. In addition, when making a blade edge into one pointed blade, it is preferable to make a butt | matching part (equivalent part of the butt | matching part 11f) correspond to the position most distant from the blade front-end | tip in a blade edge | tip part. As a result, in addition to the above-described catch avoidance effect, the cylindrical portion is unlikely to be deformed like buckling even when subjected to a large axial load during drilling.

  Further, the two edges of the bent metal plate are combined at the locations of the butted portions 11e and 11f. The structure of the butting portion 11e of the sleeve 11a that connects the two edges of the metal plate is an important feature in the present invention. In this abutting portion 11e, one side edge of the metal plate provided with the rectangular groove-like concave portion 11d and the other side edge of the metal plate provided with the square convex-shaped convex portion 11c so as to correspond to the concave portion 11d. Are combined in the cylindrical surface of the cylindrical sleeve 11a.

  This combination structure may be provided at only one location in the axial direction of the sleeve 11a, but may be provided at a plurality of locations so as to suit various conditions such as the overall length of the drilling blade and the drilling load. The phrase “in the cylindrical surface” refers to an aspect in which the concave portion and the convex portion do not protrude outward beyond the outer diameter of the cylinder (sleeve 11a) to the extent that obstruction of perforation occurs.

  Due to the combined structure of the convex portion 11c and the concave portion 11d, even when an unequal axial load is applied to the cutting edge 11b of the drilling blade 11, relative displacement of both edges of the metal plate can be suppressed, and the sleeve 11a. Can be prevented from being deformed. For example, when the drag force from the drilled object acts on the cutting edge 11b on the side where the convex portion 11c is present (the sharp blade shown on the right side in FIG. 4), the edge of the metal plate on the side where the convex portion 11c is present Tries to move in the axial direction.

  However, the concave portion 11d combined with the convex portion 11c continues to lock the convex portion 11c, and the concave portion 11d and the convex portion 11c try to be displaced integrally in the surface of the sleeve 11a. For this reason, only the edge of the metal plate on the side where the convex portion 11c is present is prevented from being displaced in the axial direction. Therefore, the punching blade 11 having the sleeve 11a is not easily deformed by a normal unequal axial load because it is difficult to be deformed in the axial direction even if it receives an axial load.

  In the combination of the concave portion 11d and the convex portion 11c described above, the angle of the real part (hereinafter referred to as “groove angle”) formed by intersecting the edge of the concave portion 11d with the edge of the metal plate, shown as θ in FIG. In other words, it is the angle of the imaginary part formed by the edge of the convex portion 11c intersecting the edge of the metal plate, but 90 degrees (perpendicular to the axial direction) is the most mechanically resistant to the axial load. As the angle approaches 0 degrees (perpendicular to the circumferential direction), it becomes difficult to resist the axial load.

  When the groove angle θ is 90 degrees or more, the circumferential load that reduces the diameter of the sleeve 11a can be resisted, but the circumferential load that increases the diameter of the sleeve 11a cannot be mechanically resisted. Therefore, as a drilling blade provided in a single-acting drilling apparatus whose main drag is an axial load, a recess 11d formed with a groove angle θ of 90 degrees, and a protrusion formed corresponding to the recess 11d The drilling blade 11 having a combined structure with 11c is preferable.

  Further, in the drilling blade 11, it is preferable to form the sleeve 11a so that the diameter can be increased if the wedge effect at the time of drilling does not make it difficult to pull out the drilling blade. For example, in the butt portions 11e and 11f, as described above, the two edges of the metal plate are formed so as not to be fixed by welding or adhesion. As a result, the flexibility of the metal plate can be utilized. For example, in the case of trying to discharge the perforated waste that has entered the inside (hollow part) of the sleeve 11a from the end opposite to the blade edge part, the sleeve 11a is elastically deformed. Since the diameter can be increased, the drilling waste can be easily discharged.

Next, an example of a combination of a concave portion and a convex portion, which is considered suitable when a circumferential load that expands the diameter of a cylindrical drilling blade, is described.
The punching blade 31 shown in FIG. 7 (perspective view) and FIG. 8 (front view) is formed with a sleeve 31a (cylindrical portion) and two sharp cutting edges 31b (pointed blades) in the same manner as the punching blade 11 described above. A cutting edge portion. The cutting edge portion may be a single pointed blade or a wavy blade. In addition, the drilling blade provided in the rotation-type drilling apparatus that drills while cutting the object to be drilled preferably has a plurality of pointed blades or a wavy blade in consideration of the number of blades that perform the cutting.

  In addition, the perforation blade 31 is formed by combining two edges of the bent metal plate at the locations of the abutting portions 31e and 31f. In this abutting portion 31e, one edge of a metal plate provided with a dovetail-shaped concave portion 31d and a metal provided with a dovetail-shaped convex portion 31c corresponding to the concave portion 31d The other edge of the plate is combined in the cylindrical surface of the sleeve 31a. As with the perforating blade 11, it is preferable to allow the sleeve 31a to be slightly elastically displaced and expanded in diameter at the butting portions 31e and 31f.

  The combined structure of the convex portion 31c and the concave portion 11d in the drilling blade 31 belongs to a joining mode called a dovetail joint. This dovetail joint is generally a convex part called an ant-shape formed so as to correspond to this dovetail groove with respect to a concave part (female type) called an ant groove whose groove shape is formed in an inverted C shape or a trapezoidal shape. By inserting and combining (male type), it is a kind of joint structure that connects the side with the concave portion and the side with the convex portion.

  In the above-described combined structure of the concave portion and the convex portion belonging to the dovetail joint, the concave portion and the convex portion act so as to relatively restrain the horizontal position and the vertical position on each side. In the drilling blade 31, the two edges of the metal plate are relatively displaced in the axial direction and the circumferential direction within the surface of the sleeve 31a by the combined structure of the concave portion 31d and the convex portion 31c using the properties of the dovetail joint. Is hindering.

  That is, the concave portion 31d and the convex portion 31c continue to engage with each other, and try to displace each other integrally in the surface of the sleeve 31a, or try to cancel moments in the surface of the sleeve 31a. For this reason, only one of the edges of the metal plate is prevented from being displaced in the axial direction or the circumferential direction within the surface of the sleeve 31a. Therefore, even if it receives an axial load or a circumferential load, the drilling blade 31 having the sleeve 31a is not easily deformed by a normal axial load generated by a single acting type or a normal circumferential load generated by a rotation type. It becomes.

  In the dovetail-shaped recess 31d described above, the groove angle θ, which is indicated by θ in FIG. 8 and forms the inclination of the inverted C shape or the trapezoidal shape, is an axial load or a circumferential load acting during drilling, and It should be determined in consideration of the mechanical strength of the recesses and protrusions. This groove angle θ is preferably 40 to 85 when the drilling blade 31 is provided in a rotating manner in which the circumferential load is more important than the axial load because the mechanical strength decreases if it is too close to 0 degrees. Degree, more preferably 50 to 75 degrees. Moreover, when it comprises in the single acting system which attaches importance to an axial load rather than a circumferential load, it is preferable to make groove angle (theta) 70-85 degree | times larger.

  The perforating blade in the present invention is a hollow blade using a metal plate, and has advantages in many points such as production efficiency, material cost, market distribution, and sharpness as compared with the hollow blade using a hollow pipe as described above. In particular, the effect of reducing the drilling resistance due to the thinning of the blade edge is important, and this contributes greatly to improving the lifetime of the drilling blade, making the drilling device more compact, and saving energy. For example, the thickness of the metal plate that is thinner than the hollow pipe can be used, and the slope forming the edge angle related to the sharpness of the edge can be narrowly formed. Although the mechanical strength decreases as the slope forming the edge of the blade becomes narrower, the punching resistance due to the cutting of the blade edge against the drilled object becomes smaller than this, and the resistance due to the biting of the cutting edge portion can be reduced. .

  Therefore, the piercing blade using the metal plate in the present invention can reduce the piercing resistance and obtain a good sharpness. In the present invention, the thickness of the metal plate is preferably 0.2 to 1.0 mm. The thinner the metal plate, the lower the perforation resistance, and the thicker, the mechanical strength can be improved. When the perforated material is soft or thin, a plate thickness of 0.05 to 0.2 mm is preferable, and when it is hard or thick, a plate thickness of 1.0 mm or more can be applied.

  Next, a specific example of the drilling device of the present invention including the above-described drilling blade 11 or the drilling blade 31 will be described with reference to the drawings. The direction in which the drilling blade moves during drilling is referred to as the drilling direction, and the direction in which the drilling blade moves to return to the original standby position after drilling is referred to as the return direction.

(Single-acting drilling device)
A first embodiment of a drilling device of the present invention is a drilling device that moves a drilling blade linearly to drill an object to be drilled, and includes two spiral grooves that are continuously wound in a reverse direction on the drilling direction side. A rotating shaft body provided on an outer periphery of the shaft, the shaft extending in the moving direction of the drilling blade, and connected to the drilling blade, engaged with the spiral groove, and rotating the rotating shaft body And the perforation connected to the derivative by moving the derivative along the one of the spiral grooves in the perforation direction by the rotation of the rotating shaft body. After the blade moves in the drilling direction and the drilling blade drills the workpiece, the derivative moves in the return direction along the other of the spiral grooves, so that the derivative and the drilling blade return in the return direction. A drilling device that moves to

Specific examples of the first embodiment described above are shown in FIG. 1 (outside view) and FIG. 2 (configuration diagram). Reference numerals in FIGS. 3 and 4 are also referred to.
The drilling device shown in FIG. 1 includes the drilling blade 11 illustrated in FIGS. 3 and 4, and the punching blade 11 moves linearly without rotating around its axis, and simply punches an object to be drilled. It is dynamic. This drilling device includes a motor 1 as a driving source, a drilling blade 11 for drilling an object to be drilled (not shown), and a drilling blade drive mechanism that moves the drilling blade 11 linearly, and travels straight. A punching mode in which the cutting edge 11b of the punching blade 11 is punched so as to bite into the drilled object is presented.

  The driving mechanism of the drilling blade 11 is engaged with the rotary shaft body 4 on the side connecting the rotary shaft body 4 and the rotary shaft body 4 arranged along the moving direction (perforation direction) of the drilling blade 11. Derivative 5 The rotating shaft body 4 is communicated with a through hole provided in the support body 6 along the perforating direction, and both ends are rotatably supported by the frames 7 and 8. The outer periphery of the rotating shaft body 4 is provided with two spiral grooves 4a that are reversely wound with each other, and the respective spiral grooves are continuously formed on the perforation direction side. A gear 3 is provided at the shaft end of the rotating shaft body 4 on the frame 7 side, and a gear 2 is provided on the rotating shaft of the motor 1 attached to the frame 7 so that the gear 2 and the gear 3 are engaged with each other. Yes.

  The derivative 5 has a convex portion 5 a and is inserted into a hole provided so as to go straight to the through hole of the support 6 to a position where the convex portion 5 a enters the spiral groove of the rotating shaft body 4. Further, the plate 9 is used to prevent the derivative 5 from retreating and leaving the spiral groove. As a result, the derivative 5 is engaged with the spiral groove of the rotating shaft body 4 and can move in the axial direction of the rotating shaft body 4 along the spiral groove by the rotation of the rotating shaft body 4.

  In a preferred embodiment, the tip of the convex portion 5a is formed in a plate shape in consideration of force transmission and durability of the member, and the derivative 5 is provided on the support body 6 according to the change in the angle of the spiral groove. It is configured to be able to rotate freely in the formed hole. When such a derivative 5 moves in the drilling direction or the return direction in the spiral groove of the rotating shaft body 4 whose axis is arranged along the drilling direction, the support 6 is also moved in the same direction as the derivative 5.

  The drilling blade 11 is attached by a pin 10 to the support 6 to which the above-described derivative 5 is attached. Therefore, the perforating blade 11 is moved in the same direction as the derivative 5 by the support 6 that moves in the same direction as the derivative 5 when the derivative 5 moves by converting the rotation of the rotary shaft 4 into the movement in the axial direction. Will be. If the two spiral grooves of the rotating shaft 4 are continuous on the return direction side, a series of operations from perforation to return can be performed by one rotation of the motor 1.

  As described above, according to the configuration described above, by one rotation of the rotary shaft body 4, the drilling blade 11 moves in the drilling direction by moving the derivative 5 along the one spiral groove to move the drilling object. It can be punched out by biting into the sheet material. At this time, a large axial load acts on the cutting edge 11b of the sleeve 11a. However, the combined structure of the concave portion 11d and the convex portion 11c in the butt portion 11e is difficult to be disassembled by the axial load acting in the cylindrical surface of the sleeve 11a.

  Accordingly, since the displacement of the concave portion 11d or the convex portion 11c in the axial direction is suppressed and the drilling blade 11 is not easily deformed, the derivative 5 is moved in the return direction along the other spiral groove, and the return direction. Therefore, the drilling blade 11 can return to the standby position.

(Rotating drilling device)
Next, a second embodiment of the drilling device of the present invention is a drilling device that moves linearly while rotating the drilling blade and drills an object to be drilled. A rotating shaft body provided on the outer periphery of the shaft, the shaft extending along the moving direction of the drilling blade, and the drilling blade connected to an end of the shaft in the drilling direction, and the spiral And a derivative that engages with the groove and converts the rotation of the rotary shaft body into an axial movement of the rotary shaft body itself. The drilling blade connected to the rotary shaft body moves in the drilling direction while rotating, and the drilling blade drills the object to be drilled, and then the derivative is transferred to the other spiral groove. Due to the engagement, the rotary shaft and the drilling blade move in the return direction. A punching device.

Specific examples of the second embodiment described above are shown in FIG. 5 (outside view) and FIG. 6 (configuration diagram). Reference numerals in FIGS. 7 and 8 are also referred to.
The boring device shown in FIG. 5 includes the boring blade 31 illustrated in FIGS. 7 and 8, and the boring blade 31 moves linearly while rotating around the axis, and rotates in order to drill the object to be drilled. belongs to. This drilling device includes a motor 21 as a driving source, a drilling blade 31 for drilling an object to be drilled (not shown), and a drilling blade drive mechanism that moves linearly while rotating the drilling blade 31. It includes a drilling mode in which the drilled object 31b is drilled by the cutting edge 31b of the drilling blade 31 that moves straight while rotating.

  The driving mechanism of the drilling blade 31 is a side to which the drilling blade 31 is coupled and is arranged so as to be along the moving direction (drilling direction) of the drilling blade 31 and the rotary shaft 24. And the derivative 25 to be combined. The rotary shaft 24 is supported by a guide hole functioning as a bearing by a combination of two rotary shaft frames 27 and 28 so as to be rotatable along the drilling direction. The outer periphery of the rotating shaft body 24 is provided with two spiral grooves 24a that are reversely wound with each other, and each spiral groove is continuously formed on the return direction side.

  Further, the rotary shaft body 24 has a drilling blade 31 attached to the shaft end portion on the drilling direction side with a pin 30 and a gear 23 attached to the shaft end portion on the return direction side. The gear 23 meshes with a gear 22 attached to the rotation shaft of the motor 21 supported by the motor frame 26. Since the gear 23 moves as the rotary shaft 24 moves in the axial direction, the motor frame 26 prevents the gear 23 from escaping in the axial direction so that the gears 22 and 23 are not disengaged. It is preferable to keep it.

  The derivative 25 has a convex portion 25 a, and the convex portion 25 a is a spiral groove of the rotary shaft body 24 with respect to the hole provided in the rotary shaft body frame 28 so as to go straight to the guide hole of the rotary shaft body 24 described above. It is inserted to the position where it enters. In this way, the derivative 25 fixed to the rotating shaft body frame 28 outside the rotating shaft body 24 engages with the rotating shaft body 24 that is arranged to be movable in the axial direction, so that the rotating shaft body 24 has its own. It is moved in the drilling direction by rotation, ie, rotation around the axis. Accordingly, the rotation of the rotating shaft body 24 (rotation) causes the fixed derivative 25 to serve as a guide mark for the rotating shaft body 24, and the derivative 25 engages with one or the other spiral groove 24 a, thereby rotating the rotating shaft body. 24 itself moves in the drilling direction or the return direction.

  The drilling blade 31 is attached to the shaft end of the rotary shaft body 24 on the drilling direction side. Therefore, when the rotary shaft body 24 itself moves in the axial direction as described above, the drilling blade 31 connected to the rotary shaft body 24 is also moved in the same direction as the rotary shaft body 24. If the two spiral grooves of the rotating shaft body 24 are continuous on the drilling direction side, a series of operations from the drilling to the return can be performed by one rotation of the motor 21.

  According to the configuration described above, the rotary shaft body 24 is moved while the rotary shaft body 24 itself rotates in the drilling direction due to the engagement of the derivative 25 with the one spiral groove by one rotation of the rotary shaft body 24. The drilling blade 31 is also moved in the drilling direction while being rotated, that is, while being rotated. Note that the amount of movement of the punching blade 31 can be controlled by the rotation control of the motor 21 based on the information detected by the detector 32 (the amount of movement of the rotating shaft body 24).

  As described above, the piercing blade 31 can move while rotating to contact the object to be punched, and the blade tip 31b can bite the object to be punched, such as a sheet material, in the circumferential direction to punch the object to be punched. At this time, a large circumferential load acts on the cutting edge 31b of the sleeve 31a. However, since the butting portion 31e has a combination structure of a concave portion 31d and a convex portion 31c such as a dovetail joint, the perforating blade 31 acts in such a circumferential direction that acts to expand the diameter of the sleeve 31a in the cylindrical surface of the sleeve 31a. Due to the load, it is difficult to cause deformation that would hinder drilling.

  Therefore, since the drilling blade 31 in which the displacement of the concave portion 31d or the convex portion 31c is prevented from expanding in the circumferential direction is not easily deformed, the rotary shaft body 24 is engaged by the engagement of the derivative 25 with the other helical groove. The operation of moving in the return direction while rotating itself is not hindered, and the drilling blade 31 can move in the return direction while rotating and return to the standby position. In addition, if the piercing blade such as the piercing blade 31 that can move linearly while rotating in this way, the piercing resistance can be further reduced, and it is difficult to cause a problem that the piercing object cannot be pulled out while being caught. Therefore, it is suitable for a punching device for an object to be punched in which a large number of sheet materials are laminated.

  Since the perforating apparatus of the present invention can reciprocate one perforating blade with a single drive mechanism as described above as the first and second forms, for example, a plurality of perforating apparatuses according to the present invention are used for a desired number of perforations. Thus, it can be configured as a perforating apparatus for a large number of perforations. According to this configuration, a simple control method that individually controls each drive mechanism corresponding to each drilling blade is used instead of a complicated control method that selectively controls the drive and non-drive of a plurality of drive mechanisms. Since it can be applied, it can contribute to the cost reduction of the drilling apparatus for multiple drilling.

Further, for example, by connecting two sets of punching devices of the present invention to one motor using a spur gear, a rack and pinion, a belt pulley, a wire pulley, etc., two holes are generated by the rotation of one motor. It is also possible to carry out perforation simultaneously.
In any of the cases described above, the punching blade in the form of the above-described drilling blade 11 is used for the single acting type in which the axial load is mainly used, and the above-described drilling is used in the rotation type in which the circumferential load is mainly used. It is preferable to apply a drilling blade in the form of the blade 31.

1. Motor, 2. Gears, 3. Gears, 4. Rotating shaft body, 4a. 4. spiral groove; Derivatives, 5a. Convex part, 6. 6. support, Frame, 8. Frame, 9. Plate, 10. Pin, 11. Drilling blade, 11a. Sleeve, 11b. Cutting edge, 11c. Convex part, 11d. Recess, 11e. Butting part, 11f. Butt section, 21. Motor, 22. Gears, 23. Gears, 24. Rotating shaft 24a. Spiral groove, 25. Derivatives, 25a. Convex part, 26. Motor frame, 27. Rotating shaft body frame, 28. Rotating body frame, 29. Drilling blade support, 30. Pin, 31. Drilling blade, 31a. Sleeve, 31b. Cutting edge, 31c. Convex part, 31d. Recess, 31e. Butt, 31f. Butt, 32. Detector 110. Sleeve, 112. Cutting edge, 113. Ribs, 115. Clearance, θ: groove angle

Claims (5)

A perforating apparatus for perforating by making a cylindrical perforating blade contact with an object to be perforated, the cylindrical perforating blade comprising a cylindrical portion formed by butting two edges of a metal plate, and an axial direction of the cylindrical portion The cylindrical portion includes a recess formed on one edge of the metal plate, and a protrusion formed on the other edge corresponding to the recess. A cylindrical perforation characterized in that the concave portion and the convex portion are combined in a cylindrical surface of the cylindrical portion, and a gap is provided between the concave portion and the convex portion. A perforating apparatus having a blade.   The said recessed part and the said convex part are dovetail joints, The drilling apparatus which comprises the cylindrical drilling blade of Claim 1 characterized by the above-mentioned.   The perforating apparatus having a cylindrical perforating blade according to claim 1 or 2, wherein the cutting edge portion is formed on two or more pointed blades.   The punching device having a cylindrical punching blade according to claim 1 or 2, wherein the cutting edge portion is formed in a wave-shaped blade.   5. The cylindrical perforating blade according to claim 1, wherein the cylindrical perforating blade is perforated while being rotated around an axis of the cylindrical perforating blade while being in contact with an object to be perforated. Drilling device.