JP6083895B2 - Drilling device - 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.

  Conventionally, as a perforating apparatus for perforating by bringing a perforating blade into contact with the object to be perforated as described above, for example, a device that reciprocates a perforating blade using the magnetic force of a solenoid (Patent Document 1), or one end of a perforating blade There is known one that reciprocally moves a drilling blade by a pressing force of a specially provided cam mechanism and a spring force against the pressing force (Patent Document 2). These piercing devices are of a type (hereinafter referred to as “single-acting type”) in which a piercing blade touches an object to be drilled without rotating around its own axis.

  Also, for example, a double gear type (Patent Document 3) in which the drilling blade is rotated around the axis by one gear mechanism and the drilling blade is reciprocated by another gear mechanism, or a single spiral groove on the outer periphery of the drilling blade. The engagement pin fixed to the device main body other than the drilling blade is engaged with the helical groove, and the crank mechanism is used to reciprocate while rotating the drilling blade around the axis by pressing the link. A moving crank link type (Patent Document 4) is known. These piercing devices are of a type (hereinafter referred to as “spinning type”) in which a piercing blade rotates (rotates) around its own axis and makes contact with an object to be drilled.

  When drilling an object to be drilled by a single-acting drilling device, the drilling blade moves in the drilling direction and comes into contact with the object to be drilled. This is a mode of punching. In addition, the drilling of an object to be drilled by the rotating drilling device is performed while the drilling blade rotates and moves in the drilling direction to come into contact with the object to be drilled. It is an aspect that penetrates while drilling into the perforated material. The self-rotating type in which the object is perforated while cutting the object to be perforated with the cutting edge has an advantage that the required perforation force is small because the perforation resistance is small, and it is advantageous in terms of downsizing the drive source of the perforation apparatus and saving energy.

JP 2000-301495 A JP 2000-141294 A JP 2006-943 A JP-A-5-138599

  In a conventional single-acting or rotating drilling device, the driving mechanism of the drilling blade is one of the dominant factors that determine the overall shape and size of the drilling device. In recent years, there has been a strong demand for downsizing of the drilling device, but it is not easy to downsize the driving mechanism of the drilling blade, and the downsizing of the drilling device is not satisfactory. For example, in the solenoid type, the size of the solenoid itself is reduced and the output is increased. In the cam press type and double gear rotary type, the number of parts is reduced and the occupied space is reduced. It is desired to solve the problems related to the driving mechanism of the drilling blade such as reduction of the cost for processing the spiral groove formed on the drilling blade and simplification of the rotation control of the drilling blade.

  The present invention has been made in view of the above-described problems to be solved. The purpose is to provide a single-acting or self-rotating drilling device that is simple and mechanically and mechanically controllable, and that is greatly reduced in size.

  The present inventor examined in detail the structural relationship between the helical groove formed on the crank link type drilling blade and the engagement pin in particular, and formed two helical grooves on the outer periphery of the rotating shaft connected to the drive source. And a mechanical configuration capable of linearly reciprocating the drilling blade by one rotation of the rotating shaft was found, and the configuration relating to the single-acting and rotating drilling devices of the present invention was reached.

That is, the first embodiment of the drilling device of the present invention is a drilling device for drilling by bringing a drilling blade into contact with an object to be drilled, and the two spiral grooves that are continuously wound in the reverse direction on the drilling direction side are pivoted. A rotating shaft body provided with one or more turns on the outer periphery of the drilling shaft, the rotating shaft body extending along the moving direction of the drilling blade, and connected to the drilling blade, engaged with the spiral groove, and the rotating shaft body The rotation of the rotation shaft body is coupled to the derivative by moving the rotation shaft along the one of the spiral grooves in the perforation direction. After the perforating blade moves in the perforating direction and the perforating blade perforates the workpiece, the derivative moves in the return direction along the other of the spiral grooves, so that the derivative and the perforating blade are It moves in the return direction. In the first embodiment, it is preferable that the two spiral grooves of the rotating shaft body are continuous on the return direction side.

Further, a second form of the drilling device of the present invention is a drilling device for drilling by bringing a drilling blade into contact with an object to be drilled while rotating around the axis of the drilling blade, which are continuously wound in the reverse direction. Rotation in which two or more spiral grooves of interest are provided on the outer periphery of the shaft, the shaft is extended along the moving direction of the drilling blade, and the drilling blade is connected to the end of the shaft in the drilling direction A shaft body and a derivative that engages with the spiral groove and converts the rotation of the rotating shaft body into an axial movement of the rotating shaft body itself, and by rotation of the rotating shaft body, When the rotary shaft moves in the drilling direction, the drilling blade connected to the rotary shaft moves in the drilling direction while rotating, and after the drilling blade drills the workpiece, By the engagement of the spiral groove with the other, the rotary shaft body and the drilling blade are Moves to return direction, characterized in that. In the second embodiment, it is preferable that the two spiral grooves of the rotating shaft body are continuous on the perforation direction side.

The above-described perforating apparatus according to the first and second aspects of the present invention can be configured as a perforating apparatus for a large number of perforations by using a plurality of these.
In addition, the above-described perforating apparatus according to the first embodiment or the second embodiment of the present invention can be configured to be connected to one drive source.

  In the present invention, the perforating blade has a cylindrical portion formed by butting two edges of the metal plate, and a blade tip portion formed at one end of the cylindrical portion in the axial direction. The portion has 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, and the concave portion and the convex portion are the cylinder. It is preferable that they are combined in the cylindrical surface of the part. More preferably, the concave portion and the convex portion are dovetail joints.

  According to the present invention, special processing such as a spiral groove is not required for the drilling blade which is a special material, and the space required for the operation of the drilling blade and the driving mechanism can be reduced. The above-described second form, which is a self-rotating type that can further reduce the piercing resistance, is particularly suitable. Further, by adding a simple process to the rotating shaft body, it is possible to continuously reciprocate the drilling blade without switching the rotation direction of the rotating shaft body. Therefore, the driving mechanism of the drilling blade can be simplified mechanically and controllably, and a single-acting or self-rotating drilling device that is remarkably compact can be provided.

  In addition, according to the present invention in which one perforation blade can be reciprocated by a single drive mechanism, it is not a complicated control method for selectively interlocking driving and non-drive of a plurality of drive mechanisms, but individual perforation blades. A simple control method for individually controlling the corresponding individual drive mechanisms can be applied. Moreover, it can also be comprised also in the perforation apparatus which can drive a some perforation apparatus with one drive source. Therefore, it is possible to contribute to cost reduction of a drilling device for drilling a large number of holes.

It is an external view showing 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. It is an external view showing an example of the 2nd form (autorotation type) of the punching apparatus of this invention. It is a block diagram showing the detailed structure of the punching apparatus shown in FIG. It is a schematic diagram showing the specific example of the two helical grooves of the rotating shaft body applicable in this invention. It is a schematic diagram showing an example of the engagement relationship of the helical groove | channel of the rotating shaft body applicable in this invention, and the derivative engaged with this. It is a front view showing an example of the drilling blade applicable in this invention. FIG. 8 is a front view illustrating a drilling blade different from the drilling blade illustrated in FIG. 7.

  The present invention relates to a piercing device for piercing a piercing blade in contact with an object to be drilled, and a technically important feature is a mechanical mechanism for driving the piercing blade. Specifically, the main part of the drilling blade driving mechanism is engaged with a rotating shaft body provided with two spiral grooves on the outer periphery in a reversely wound relationship with each other, and the rotating shaft body Is composed of a derivative that converts the rotation of the shaft into a movement in the axial direction. In addition, the two spiral grooves provided on the outer periphery of the rotating shaft body are continuous on the perforation direction side in the first embodiment described above, and are continued on the return direction side in the second embodiment described above.

  Regarding the above-mentioned two spiral grooves, continuous means that one spiral groove is connected to the other spiral groove, and the derivative is transferred from one spiral groove to the other spiral groove and vice versa. , Meaning that it is movable. Also, the direction in which the drilling blade moves to pierce the workpiece is referred to as the piercing direction, and the direction in which the piercing blade moves to return to the original standby position after piercing the workpiece is referred to as the return direction. In the shaft body, the drilling direction side means the side close to the drilled object of the shaft body, and the return direction side means the side far from the drilled object of the shaft body.

  Hereinafter, a specific example of the punching apparatus of the present invention will be given and 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.

(First form of punching device)
The perforating apparatus shown in FIG. 1 (external view) and FIG. 2 (configuration diagram) is a first form of the perforating apparatus of the present invention and is a single-acting type. This piercing device includes a motor 1 as a driving source, a piercing blade 11 for piercing an object (not shown), and a piercing blade driving mechanism that moves the piercing blade 11 toward the object to be drilled. In addition, the cutting edge of the perforating blade 11 that goes straight is pierced into the object to be punched and punched so as to punch out while biting into the object.

  The driving mechanism of the piercing blade 11 is engaged with the rotary shaft body 4 on the side connecting the piercing blade 11 and the rotary shaft body 4 having a shaft arranged along the moving direction (piercing direction) of the piercing blade 11. And 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 orthogonal 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. The movement of the derivative by the rotation of the rotating shaft will be described in detail later. Therefore, when the derivative 5 moves in the drilling direction or the return direction in the spiral groove of the rotating shaft 4 on which the shaft is arranged so as to be 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.

  Therefore, according to the above-described configuration, by one rotation of the rotary shaft body 4, the drilling blade 11 is moved in the drilling direction by moving the derivative 5 along the one spiral groove, and moves to the drilling direction. Can be punched. After this, the derivative 5 can be moved in the return direction along the other spiral groove, moved in the return direction, and returned to the standby position.

(Second form of punching device)
The punching device shown in FIG. 3 (outside view) and FIG. 4 (configuration diagram) is a second form of the punching device of the present invention, and is a self-rotating type. This drilling device moves toward a drilled object while rotating the drilling blade 31 about an axis, a motor 21 as a driving source, a drilling blade 31 for drilling a drilled object (not shown). The cutting edge of the piercing blade 31 that includes a piercing blade drive mechanism and moves straight while rotating, cuts the object to be drilled, and advances straight while piercing and drills.

  The driving mechanism of the drilling blade 31 is a rotating shaft body 24 on the side where the drilling blade 31 is coupled and the shaft is arranged so as to be along the moving direction (piercing direction) of the drilling blade 31, And a derivative 25 to be engaged. 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 be orthogonal 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. Note that the movement of the rotary shaft itself in the axial direction due to the rotation of the rotary shaft will be described in detail later.

  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.

  Therefore, according to the configuration described above, by one rotation of the rotary shaft body 24, the drilling blade 31 is moved while the rotary shaft body 24 itself rotates in the drilling direction by the engagement of the derivative 25 with one spiral groove. Therefore, the drilling blade 31 is also moved in the drilling direction while being rotated, that is, in a rotated state. Note that the amount of movement of the punching blade 31 can be controlled by rotation control of the motor 21 based on information detected by the detector 32 (the amount of movement of the rotating shaft body 24). In addition, after drilling, the rotary shaft 24 itself is moved in the return direction while rotating by engagement of the derivative 25 with the other spiral groove, so that the drilling blade 31 is moved in the return direction while being rotated, It is possible to return to the standby position.

  As described above, the drilling blade 31 moved while rotating makes contact with the drilled object, and the blade tip can tear the drilled object such as a sheet material, and further drill while drilling into the drilled object. Unlike the single-acting type by forcibly punching, the rotation type capable of drilling while utilizing the pulling effect by rotation can further reduce the drilling resistance.

(Two spiral grooves of rotating shaft)
The two spiral grooves that can be applied in the present invention are reversely wound with each other, and the cross-sectional shape of the grooves is continued. To be formed. The configuration will be described with reference to FIG. In order to clarify the configuration of the spiral groove shown in FIG. 5, the spiral groove 4a of the rotary shaft body 4 shown in FIG. 2 and the spiral groove 24a of the rotary shaft body 24 shown in FIG. However, the number of turns of the spiral groove is increased.

  The two spiral grooves shown in FIG. 5 are continuous on both sides of the perforation direction side and the return direction side in a reversely wound relationship, and derivatives (not shown) that enter and engage with the grooves are indicated by arrows. It is formed to be freely movable. A rotating shaft body having a configuration in which two spiral grooves are continuous on both sides can be applied to both the first embodiment and the second embodiment of the present invention. A rotating shaft body having a configuration in which two spiral grooves are continuous only on the perforation direction side can be applied to the first embodiment, and a rotating shaft body having a configuration continuous only on the return direction side can be applied to the second embodiment.

(Engagement relationship between rotating shaft body and derivative)
FIG. 6 shows an example of the engagement relationship between the rotating shaft body 24 and the derivative 25 including a partial cross section based on the specific example of the second form shown in FIG.
The derivative 25 rotates the convex portion 25a by the support 26 fixed to the frame 27 (not shown) and the plate 29 so as not to prevent the rotation shaft 24 itself from moving in the axial direction due to the engagement of the derivative 25. The shaft body 24 is assembled by being inserted into the spiral groove 24a. And since the derivative | guide_body 25 inserted in the hole provided in the support body 26 is free to rotate and finely move back and forth in the hole, the convex portion 25a is suitable for the contact state of the wall surface of the spiral groove 24a. It can be a posture. By engaging the protrusion 25a of the derivative 25 into the spiral groove 24a, the engagement relationship between the rotary shaft body 24 and the derivative 25 can be maintained. It should be noted that the shape and material of the spiral groove and the convex portion can be appropriately designed in consideration of the diameter and length of the rotary shaft body, the mass of the movable part such as the drilling blade, and the mechanical configuration.

(Movement of derivative by rotation of rotating shaft)
In the case of the configuration shown in FIG. 6, the fixed derivative 25 cannot move due to the rotation of the rotating shaft body 24, and the rotating shaft body 24 can move in the axial direction while rotating. Although illustration is omitted, if the derivative side is fixed and movable, and the movement of the rotating shaft body in the axial direction is stopped, the rotating shaft body cannot be moved by rotation of the rotating shaft body, and the derivative side is axially moved. Can move to.

  More specifically, in FIG. 5, for example, when the right side of FIG. 5 is the drilling direction, a derivative (not shown) has moved one spiral groove as indicated by an arrow A by one rotation of the rotating shaft. ) Is transferred from the arrow B to the other spiral groove as indicated by the arrow C and the arrow D at a position on the perforation direction side where the two spiral grooves are continuous. Similarly, a derivative (not shown) that has moved one spiral groove as indicated by an arrow A ′ by the same one rotation of the rotating shaft body is changed from an arrow B ′ to an arrow C ′ at a position on the return direction side. As indicated by the arrow D ′, the process moves to the other spiral groove.

  Therefore, the structure in which the derivative is engaged with the two spiral grooves continuous on the perforation direction side in a reversely wound relationship as described above, the rotation direction of the rotation shaft body is changed by one rotation of the rotation shaft body. Without switching, the moving direction of the derivative can be continuously switched from the drilling direction to the return direction on the drilling direction side of the rotating shaft, and from the return direction to the drilling direction on the return direction side of the rotary shaft body. In addition, when applying a rotating shaft body having a configuration in which two spiral grooves are continuous only on either the drilling direction side or the return direction side, one drilling operation is performed by one rotation of the rotating shaft body, and the next time Can be performed by the other rotation of the rotating shaft.

(Movement between rotating shaft and derivative)
In the configuration of the rotary shaft body and the derivative described above, when the rotary shaft body that stops moving in the axial direction is applied, the rotary shaft body is driven by pushing the derivative through the spiral groove by the rotation of the rotary shaft body, The derivative can be moved in the axial direction of the rotary shaft along the spiral groove. In addition, when a derivative fixed outside the rotating shaft body is applied, the derivative is fixed in a helical form because the rotating shaft body tries to push the derivative through the spiral groove by rotation of the rotating shaft body. The rotating shaft body can be driven and driven through the groove, and the rotating shaft body can be moved in the axial direction. Therefore, if it has the structure mentioned above, a derivative | guide_body and a rotating shaft body will become a structure which can be relatively moved whether a derivative | guide_body moves or a rotating shaft body moves.

(Perforated blade)
The drilling blade provided in the drilling device of the present invention may be a solid blade that is not pipe-shaped, or a hollow blade that is pipe-shaped. When a hollow blade is applied, a structure in which two edges formed by bending a metal plate into a cylindrical shape are abutted by a combination of a concave portion and a convex portion is preferable. That is, in the present invention, the perforated blade has a cylindrical portion formed by butting two edges of the metal plate, and a blade edge portion formed at one end of the cylindrical portion in the axial direction. As shown in FIG. 7, the metal plate has 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. In addition, it is preferable that they are combined in the cylindrical surface of the cylindrical portion. More preferably, the concave portion and the convex portion are dovetail joints as shown in FIG.

  For example, the perforation blade 11 provided in the first embodiment of the above-described perforation apparatus is a cylindrical hollow blade made of a metal plate as shown in FIG. 7 (front view). The sleeve 11a (cylindrical portion) is formed by bending a metal plate punched into a predetermined shape by a pressing device into a cylindrical shape, and one end in the longitudinal direction (axial direction) of the sleeve 11a has two sharp cutting edges 11b (pointed edges). The cutting edge portion has a (head blade). The blade edge portion is not limited to two pointed blades, and may be one or more.

  The two edges of the metal plate that are bent are joined by the butted portions 11e and 11f. Then, one side edge of the metal plate provided with the rectangular groove-shaped concave portion 11d and the other side edge of the metal plate provided with the square convex shape convex portion 11c so as to correspond to the concave portion 11d are cylindrical. The sleeve 11a is combined in the cylindrical surface of the sleeve 11a, and the sleeve 11a can be effectively prevented from being deformed.

  For example, even if an uneven axial load is applied to the blade edge 11b and the two edges of the metal plate are relatively displaced and attempt to displace in the axial direction, the concave portion 11d and the convex portion 11c in the cylindrical surface Since they are combined with each other like parts of a jigsaw puzzle, the above-described axial displacement can be reliably suppressed, and undesirable plastic deformation of the sleeve 11a can be prevented. 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.

  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 addition, it is good to select the recessed part and convex part which were mentioned above in consideration of the load with respect to a drilling blade, use conditions, etc., square shape, trapezoid shape, inverted trapezoid shape, T shape, semicircle shape, semi-elliptical shape, Or it can be in a shape such as a triangle. 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.

  Further, for example, the punching blade 31 provided in the above-described second embodiment of the punching device is a hollow hollow blade made of a metal plate as shown in FIG. 8 (front view). The sleeve 31a and the two cutting edges 31b of the cutting edge portion are formed in the same manner as the above-described drilling blade 11, and the positional relationship between the butting portion 31f and the cutting edge is also considered in the same manner as the drilling blade 11. In the case of a drilling blade provided in a rotating manner, it is preferable to have a plurality of pointed blades of 2 or more, or a wavy blade in consideration of the number of blades that cut the object to be drilled.

  Further, the perforating blade 31 has a metal plate provided with a dovetail-shaped concave portion 31d at the butted portion 31e of the two edges of the bent metal plate, and the concave portion 31d. Correspondingly, the other edge of the metal plate provided with the dovetail-shaped convex portions 31c is combined in the cylindrical surface of the sleeve 31a. This combination structure 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 combination structure of the concave portion 31d and the convex portion 31c belonging to the dovetail joint, the concave portion 31d and the convex portion 31c act so as to relatively restrain the horizontal position and the vertical position on each side, and thus the above-described structure. The combination effect like a jigsaw puzzle part can be further enhanced. Utilizing the nature of this dovetail joint, in the perforating blade 31, 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 the moment in the surface of the sleeve 31a is increased. They try to eliminate each other, and only one of the edges of the metal plate prevents displacement in the axial direction or circumferential direction within the surface of the sleeve 31a. Therefore, the punching blade 31 is difficult to be deformed by a normal axial load or a normal circumferential load generated by the rotation type.

  Moreover, the hollow blade made of the metal plate described above is more advantageous than the hollow blade using a hollow pipe in many points such as production efficiency, material cost, market distribution, and sharpness. 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. .

  As described above, the piercing device of the present invention is provided with two spiral grooves on the outer periphery of the shaft, which are provided in the main part of the piercing blade driving mechanism and have two spiral grooves that are continuously wound in the piercing direction side. A rotating shaft body having the shaft extended along a moving direction, a derivative coupled to the drilling blade, engaged with the spiral groove, and converting the rotation of the rotating shaft body into axial movement; Have. Alternatively, two spiral grooves that are reversely wound in relation to each other on the return direction side are provided on the outer periphery of the shaft, the shaft is extended along the moving direction of the drilling blade, and the end of the shaft in the drilling direction And a derivative that engages with the spiral groove and converts the rotation of the rotating shaft body into movement in the axial direction of the rotating shaft body itself. That is, the perforating apparatus of the present invention realizes the relative movement between the derivative and the rotating shaft body by a simple and novel mechanical mechanism, and enables the reciprocating movement of the perforating blade.

  Therefore, in the drilling device, the space required for the operation of the driving mechanism of the drilling blade and the space occupied by the drive mechanism components can be reduced, and it is not necessary to process the spiral groove or the like on the drilling blade which is a special material. In addition, since the number of components of the drive system is reduced and mechanical efficiency can be improved, it is possible to reduce power consumption, noise and vibration. Furthermore, by making both ends of the two spiral grooves continuous, the reciprocating movement of the drilling blade can be continuously performed without switching the rotation direction of the rotary shaft body. Therefore, the punching device of the present invention becomes a mechanically much more compact punching device, and further becomes a punching device that is simplified in terms of control.

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, θ: Groove angle

Claims (9)

A drilling device for drilling by bringing a drilling blade into contact with an object to be drilled, comprising at least one spiral spiral groove in a reversely wound relationship continuous on the drilling direction side on the outer periphery of the shaft, and moving the drilling blade A rotating shaft body having the shaft extended along a direction, a derivative coupled to the drilling blade, engaged with the spiral groove, and converting rotation of the rotating shaft body into axial movement; And the rotation of the rotating shaft causes the derivative to move in the drilling direction along one of the spiral grooves, so that the drilling blade connected to the derivative moves in the drilling direction. After drilling the object to be drilled, the derivative and the drilling blade move in the return direction by moving the derivative along the other of the spiral grooves in the return direction. .   The perforating apparatus according to claim 1, wherein the two spiral grooves of the rotating shaft body are continuous on the return direction side.   3. A perforating apparatus comprising a plurality of perforating apparatuses according to claim 1 or 2, wherein the perforating apparatus is configured for a large number of perforations. A perforating apparatus for perforating by rotating a perforating blade around an axis of the perforating blade and bringing it into contact with an object to be perforated. One or more turns , the shaft is extended along the moving direction of the drilling blade, and the rotary shaft body is connected to the end of the shaft in the drilling direction, and is engaged with the spiral groove And a derivative that converts rotation of the rotating shaft body into axial movement of the rotating shaft body itself, and by rotating the rotating shaft body, the rotating shaft body moves in the drilling direction, After the drilling blade connected to the rotating shaft moves in the drilling direction while rotating, the drilling blade drills the object to be drilled, and then the rotation is performed by engaging the derivative with the other of the spiral grooves. The shaft body and the drilling blade move in the return direction. Punching device.   The perforating apparatus according to claim 4, wherein the two spiral grooves of the rotating shaft body are continuous on the perforating direction side.   6. A perforating apparatus comprising a plurality of perforating apparatuses according to claim 4 or 5, wherein the perforating apparatus is configured for a large number of perforations.   The drilling device according to claim 3 or 6, wherein the drilling device is connected to one drive source.   The perforated blade has a cylindrical portion formed by abutting two edges of a metal plate, and a blade tip portion formed at one end in the axial direction of the cylindrical portion, and the cylindrical portion is formed of the metal plate. A concave portion formed on one edge and a convex portion formed on the other edge corresponding to the concave portion, and the concave portion and the convex portion are combined in the cylindrical surface of the cylindrical portion. The perforating apparatus according to claim 1, wherein the perforating apparatus is provided.   The perforating apparatus according to claim 8, wherein the concave portion and the convex portion are dovetail joints.