JP2012055991A - Sheet punching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet punching device with a simple structure having a punch drive mechanism of applying a lever crank mechanism, and having the switching function of two holes and four holes mainly used much, for example, in a European zone.SOLUTION: The sheet punching device includes a drive source, two sets of punch mechanisms A, B, and a switching mechanism. The punch mechanisms A, B have a punch for punching a sheet material by meshing with a die hole and a lever crank mechanism for driving the punch for punching, respectively. The switching mechanism has a main drive part for rotating in both directions according to the drive direction of the drive source and a driven part connected to the main drive part and rotating in one direction. The driven part is connected to a lever crank mechanism for driving the punch mechanism A, while the main drive part is connected to a lever crank mechanism for driving the punch mechanism B. In the sheet punching device, by the switching of the drive direction of the drive source, either simultaneous driving of the punch mechanisms A, B or one side driving of the punch mechanism B is switched.

Description

  The present invention relates to, for example, a copying machine, a printer, a facsimile, and a body of an image forming apparatus such as a composite device or a punching device mounted on a printing machine, and various sheet materials having a sheet-like form. The present invention relates to a sheet material punching device having a switching function of the number of punched holes, for example, a switching function of 2 holes and 4 holes.

2. Description of the Related Art Conventionally, in a sheet material punching device capable of switching the number of punches, a punch is linearly moved toward a die hole to punch a sheet material. For example, a reciprocating punch drive disclosed in Patent Documents 1 to 4 Mechanisms are frequently used.
The punch drive mechanism disclosed in Patent Document 1 is an eccentric that is positioned above the punch by dividing the phase of the cam curve into two groups in the rotational direction on a rotational axis that is movable in an axial direction perpendicular to the punching direction. By arranging the cam and switching the moving direction in the axial direction of the rotating shaft, the eccentric cam of the desired group can press the punch head in the punching direction, so that only the punch located below the eccentric cam is driven to drill. can do.

  Further, the punch drive mechanism disclosed in Patent Document 2 has a cam surface or cam groove that is positioned above the punch by dividing the cam curve into two groups on a slide bar that is movable in a direction perpendicular to the punching direction. By arranging and switching the slide bar movement direction, the cam surface or cam groove of the desired group can press the punch head in the punching direction, so that only the punch located below the cam surface or cam groove is drilled. Can be driven.

  In addition, the punch driving mechanism disclosed in Patent Document 3 is provided with a cam groove divided into two groups on a slide plate that is movable in a direction orthogonal to the perforation direction, and the direction of movement of the slide plate. With the configuration in which the punches connected to the cam grooves of a desired group can be pressed in the punching direction by switching, the punching drive can be performed only for the punches connected to the cam grooves.

  Further, the punch driving mechanism disclosed in Patent Document 4 swings the fan-shaped member having the groove cam to which the punch is connected in accordance with the moving direction of the slide plate that is movable in the direction orthogonal to the punching direction. The cam curve is divided into two groups, and the fan-shaped member of the desired group can be swung by switching the moving direction of the slide plate, so that only the punch connected to the groove cam of the fan-shaped member is driven to drill. can do.

  Among these, the punch driving mechanism disclosed in Patent Document 3 has an advantage that the sheet material punching apparatus is relatively easy to downsize and reduce the cost. However, from the viewpoint of driving force transmission, after the driving force from the driving source is transmitted in the direction parallel to the sheet surface by the slide plate, it is converted into the direction perpendicular to the sheet surface which is the punching direction of the punch by the cam surface or cam groove. As a result, a relatively large driving force loss is involved. Therefore, a large driving source sufficient to compensate for the driving force loss is required, which has been an obstacle for further progress in the downsizing and cost reduction of the sheet material punching device and energy saving.

  In view of this, the present applicant has proposed a reciprocating sheet material punching device having a simple structure in which a lever crank mechanism with less driving force loss than the conventional punch driving mechanism described above is applied in Patent Document 5. Specifically, the punch is locked to the connecting member constituting the lever crank mechanism, and the punch is driven to drill by swinging the connecting member in the punching direction of the punch. With this configuration, it is possible to improve the drive power transmission efficiency and reduce the size of the drive source. In addition, the mechanical structure is simplified, and the sheet material punching device is further reduced in size, cost, and energy saving. It was possible.

Japanese Patent Laid-Open No. 10-296694 JP 2001-171900 A JP 2001-198889 A Japanese Patent Laid-Open No. 2003-200391 JP 2009-255279 A

  The sheet material punching devices disclosed in Patent Documents 1 to 4 described above each have a function of switching the number of punches that can be driven by selecting one of the punch groups divided into two groups. The function of switching the number of punches is not an essential function in the sheet material punching device. In practice, a punch may be provided corresponding to the number of perforations used. However, worldwide regional customs, such as 2 holes and 4 holes, which are mainly used in Europe, or 2 holes and 3 holes, which are mainly used in North America, are different or mixed. The sheet material punching device having a function of switching the number of punches was desired.

  Due to such circumstances, the sheet material punching device to which the applicant proposed in Patent Document 5 is applied a switching function of the number of punches as in Patent Documents 1 to 4, and further downsizing is possible. There was a strong desire to reduce costs.

  An object of the present invention is to provide a punch driving mechanism to which the lever crank mechanism proposed in Patent Document 5 is applied, and to have a function of switching the number of perforations to be perforated in a sheet material. It is to provide a sheet material punching device having a simple structure capable of punching a sheet material by appropriately selecting 2 or 4 holes with a distance of 80 mm or the like.

The present invention has been made in view of the above-described problems.
That is, the present invention comprises a drive source, two sets of punch mechanism parts A and B, and a switching mechanism part, and the punch mechanism parts A and B are punches punched into a sheet material by meshing with a die hole, An insulator crank mechanism for driving the punch to punch, and the switching mechanism is coupled to the main driving unit that rotates in both directions corresponding to the driving direction of the driving source. A follower that rotates in one direction, the follower connected to a lever crank mechanism that drives the punch mechanism A, and the main drive connected to a lever crank mechanism that drives the punch mechanism B. The sheet material punching device switches between simultaneous driving of the punch mechanism portions A and B or one-side drive of the punch mechanism portion B by switching the drive direction of the drive source.

  In the present invention, the main driving portion includes a plurality of teeth arranged in an annular shape, the driven portion includes a plurality of teeth corresponding to a tooth shape of the main driving portion, and the main driving portion and the driven portion are provided with the teeth. It is possible to apply a mechanical configuration in which the driven portion is connected to the main driving portion and rotates by meshing of the teeth included.

  Further, in the switching mechanism portion, the teeth of the main driving portion have a front tooth surface that is a front side and a rear tooth surface that is a rear side in a rotation direction connected to the driven portion of the main driving portion. It is desirable to apply a mechanical configuration in which an inclination angle formed by a plane including the front tooth surface and a plane orthogonal to the rotation center of the main moving portion is formed at 70 to 110 degrees.

  In the punch mechanism portions A and B, the lever crank mechanism includes a crank member connected to the switching mechanism portion and rotating, a lever member supported at one end so as to be swingable, and a punch. A connecting member that connects the crank member and the lever member; and a fixing member that supports the rotating shaft of the crank member and the one end of the lever member, and the connecting member is punched by the rotational movement of the crank member. It is possible to apply a mechanical configuration in which the punch is driven to pierce by swinging in the piercing direction.

  In the lever crank mechanism, it is desirable to apply a mechanical configuration including a detent mechanism portion that suppresses the rotational movement of the crank member or suppresses the swing of the lever member.

  Further, in the present invention, each of the punch mechanism portions A and B includes two punches, and the punches of the punch mechanism portion A are arranged on both end sides, and the punch mechanism portions A and B are simultaneously driven. The four holes can be made into a sheet material punching device that punches two holes in the sheet material by one-side driving of the punch mechanism B.

  In the sheet material punching device of the present invention, two sets of punch mechanism parts A and B can be driven simultaneously by switching the driving direction of the drive source, or only one punch mechanism part B can be driven to punch. it can. Accordingly, in the two sets of punch mechanisms A and B, for example, by providing punches corresponding to the positions of the two holes or four holes drilled in the sheet material, the two sets of punch mechanisms A and B are driven simultaneously. 4 holes can be drilled, and two holes can be drilled by driving one punch mechanism B on one side. In addition, the sheet material punching apparatus according to the present invention employs a punching drive mechanism having a simple mechanical structure to which a lever crank mechanism with less driving force loss than the conventional proposed in Patent Document 5 is applied. It also has the advantage of being effective for energy saving, cost reduction and energy saving.

BRIEF DESCRIPTION OF THE DRAWINGS The structure of the sheet | seat material punching apparatus used as an example of this invention is shown, (a) is a top view, (b) is a front view. It is a top view which expands and shows the structure of the switching mechanism part C shown to Fig.1 (a). FIG. 2 is a front view showing a state in which two sets of punch mechanism portions A and B are simultaneously driven from a standby position shown in FIG. It is a front view which shows the state which driven the punch mechanism part B from the stand-by position shown in FIG.1 (b), and punched two holes in the sheet | seat material from the viewpoint opposite to FIG.1 (b). A series of punching operations when punching four holes in a sheet material using the sheet material punching device shown in FIG. FIG. It is a top view which shows an example of the switching mechanism part which consists of another structure from FIG.

  The sheet material punching device of the present invention includes, as a basic configuration, a drive source, two sets of punch mechanism portions A and B, and a switching mechanism portion, and the punch mechanism portions A and B are engaged with a die hole. One or more punches for punching the sheet material and an insulator crank mechanism for punching the punches are provided. An important feature of the sheet material punching device of the present invention having such a basic configuration is that the mechanical structure of the switching mechanism section described later is a simple control that only selects and switches the drive direction of the drive source. It is possible to select and switch whether the punch mechanism B is driven on one side or the two sets of punch mechanisms A and B are driven simultaneously.

  The switching mechanism part in the present invention is located on one end side of the punch mechanism parts A and B, is connected to a driving source, and rotates in both directions in response to switching of the driving direction of the driving source, and the main driving part And a driven portion that rotates in one direction. The punch mechanism portion A is connected to the driven portion, and the punch mechanism portion B is connected to the main drive portion. Particularly important is a mechanical configuration that maintains the connection of the driven part to the main driving part or cancels the connection of the driven part in response to switching of the driving direction of the driving source.

Hereinafter, the main driving portion and the driven portion of the switching mechanism that are important in the present invention will be described.
In the present invention, the main driving unit is connected to the driving source and the driven unit, and has a mechanical configuration that can be rotated in both directions in response to switching of the driving direction of the driving source. Therefore, for example, if the drive source is a rotary drive source such as a motor, the main drive unit has a configuration in which the rotary motion can be rotated by itself with a mechanical element such as a gear, and the drive source is a cylinder or the like. The linear drive source has a configuration in which the linear motion has a mechanical mechanism such as a rack and pinion or a crank and can be rotated by itself.

  Furthermore, the main drive part has a configuration that can be directly or indirectly connected to one punch mechanism part B to drive the punch mechanism part B regardless of the drive direction of the drive source. For example, the main drive part transmits its rotary motion as a rotary motion to the punch mechanism B which has a mechanical element such as a gear and is connected. Further, a driven portion that rotates in one direction is also connected to the main driving portion.

  In the present invention, the driven portion has a mechanical configuration that can receive the rotational motion of the main driven portion as its own rotational motion when the driven portion is connected to the main driven portion. Furthermore, it shall have the structure which can be connected directly or indirectly with respect to the other punch mechanism part A, and can drive this. Therefore, for example, a driven mechanism described later is applied between the driven unit and the driven unit, and the driven drive unit receives the rotational motion of the connected driven unit as its own rotational motion, and the received rotational motion has a mechanical element such as a gear. Thus, the rotation is transmitted as a rotational motion to the punch mechanism A to be connected.

  In constructing the follower rotating in one direction as described above, for example, a one-way clutch mechanism such as a meshing method using a gear or a pressure contact method using friction or magnetism, a gear system having a pawl or the like, or a cage A ratchet mechanism, such as a system that imparts directivity to the rolling direction of the inner shaft, or a coupling mechanism such as a commercially available one-way clutch component that applies these, can be applied. The output side is the driven part, and the input side is the main driving part. It can be.

  Further, in the present invention, it is important that the driven portion is configured to be connected to the main driving portion and rotate in one direction. Here, the “connected to the main driving part and rotating in one direction” means that the main driving part that rotates in both directions by switching the driving direction of the driving source is connected to rotation in one direction. Rotate in one direction and do not connect to rotation in the other direction of the main driving part and do not rotate or connect to the main driving part even if it is connected to the main driving part Means that the device itself does not rotate because is canceled.

  In configuring such a special connection relationship between the main driving unit and the driven unit, for example, it has a plurality of teeth arranged in an annular shape with respect to the main driving unit, and corresponds to the tooth shape of the main driving unit with respect to the driven unit. A mechanical configuration in which a plurality of teeth are provided and the driven portion is connected to the driven portion by meshing the teeth of the driven portion and the driven portion is preferable. The mechanical meshing configuration using such a tooth profile applies a unidirectional clutch mechanism using the above-described magnetism, a gear system having pawls such as pawls, or a ratchet mechanism that imparts directivity to the inner shaft. Compared to the above, there are many advantages such as that the mechanical configuration can be simplified, the size and weight can be easily reduced, and the driving force transmission can be made highly efficient.

  In addition, when the meshing configuration using the above-described tooth profile is applied to the coupling configuration of the main driving unit and the driven unit, the driving force is transmitted from the main driving unit to the driven unit between the tooth surfaces that are in contact by the meshing of the tooth profile. . At this time, the transmission efficiency decreases as the above-described inclination angle of the meshing tooth surfaces decreases. Therefore, as a tooth to be applied to the tooth profile of the main driving portion described above, in the rotation direction connected to the driven portion of the main driving portion, it is formed to have a front tooth surface that is the front side and a rear tooth surface that is the rear side, It is desirable that an inclination angle formed by a plane including the front tooth surface and a plane orthogonal to the rotation center of the main driving portion is formed at 70 to 110 degrees. In particular, when the inclination angle is in the vicinity of 90 degrees, it is hardly affected by the contact friction between the teeth of each other, and a highly efficient driving force can be transmitted.

  However, if this inclination angle is set to less than 70 degrees, the contact force generated by the meshing of the tooth profile becomes too small due to the influence of the slip generated between the tooth surfaces, and the transmission efficiency of the driving force is rapidly deteriorated. In some cases, the meshing state of the tooth profile becomes unstable, and the driven part may not rotate. Moreover, if this inclination angle is set to exceed 110 degrees, there will be a gap corresponding to an angle difference from 90 degrees, and the initial operation of the rotational drive due to the meshing of the tooth profile tends to become unstable. Since the tooth tip of the tooth is thin, the tooth tip is likely to be damaged due to insufficient mechanical strength.

  By applying the configuration using the above-described tooth profile, when the driven part is connected to the main driving part and rotated, the connection state between the main driving part and the driven part generated by the engagement of the tooth profile can be maintained more stably. In addition, since the inclination related to the rear tooth surface of the tooth forming the tooth profile of the main driving part can be suitably formed, the tooth on the main driving part side is driven when it is not desired to rotate without connecting the driven part to the main driving part. It is possible to more surely realize the non-connected state of the main driving portion and the driven portion generated by riding on and over the tooth on the portion side.

  The sheet material punching device according to the present invention includes the above-described switching mechanism unit, and connects the lever crank mechanism of the punch mechanism unit A to the driven unit, thereby rotating the driven unit in one direction. When A is driven and the lever crank mechanism of the punch mechanism B is connected to the main moving part, the punch mechanism B is driven by bi-directional rotation of the main driving part.

  For example, in the punch mechanism portions A and B described above, two punches are provided so that the distance between the holes becomes 80 mm or the like corresponding to the positions of the two holes and four holes perforated in the sheet material. According to the present invention, the punch of A is disposed on both ends, and the punch of the punch mechanism B is disposed on the inner side thereof, thereby having a switching function that allows selection of 2-hole or 4-hole drilling often used in Europe. An example sheet material punching device can be obtained. In this case, four holes can be punched by simultaneous driving of the punch mechanism parts A and B, and two holes can be punched by one-side driving of the punch mechanism part B. At this time, by arranging all punches on a straight line to form a punch row, it is possible to arrange the hole row to be punched in the sheet material on the straight line.

  In the sheet material punching apparatus of the present invention, the lever crank mechanism is applied as a mechanical mechanism for punching and driving the punches in the punch mechanism portions A and B. Therefore, the crank mechanism transmits the driving force of the driving source to the punch with high efficiency through the switching mechanism, and the punching mechanism is linearly driven while amplifying the driving force by the lever structure. Since it can be realized with a simple mechanical structure, it is possible to make the punch mechanism portion compact, reduce costs, and save energy.

  As described above, the sheet material punching device of the present invention can be used as a reciprocating sheet material punching device that enables switching of the number of punches for a sheet material. Mounting on office equipment such as a processing device is particularly suitable. Further, the sheet material to be perforated by the sheet material perforating apparatus of the present invention may be various sheet materials having a sheet form, for example, paper, resin, food, wood, metal, ceramics, or these It can be applied to a composite material or the like.

Next, the lever crank mechanism according to the present invention for punching and driving the punch in the punch mechanism portions A and B will be described.
The lever crank mechanism applied in the present invention includes a crank member that is connected to the switching mechanism portion in the present invention described above and rotates, a lever member that is supported so as to be swingable, a crank member that is provided with a punch, A connecting member that connects the lever member, and a fixed member that supports the rotating shaft of the crank member and the one end of the lever member, and the connecting member swings in the punching direction of the punch by the rotational movement of the crank member. A mechanical mechanism for driving the punch can be applied.

  Here, the lever crank mechanism is a mechanical mechanism that generally has four links, and that belongs to a four-bar rotation chain in which all the links are linked by turning pairs, and has the smallest length among the links. This is a mechanical mechanism that fixes a link that is paired with this link. In other words, the lever crank mechanism is a machine in which one of the four links that form a chain by turning pairs is a fixed link that cannot move, and three links including the link of the minimum length are configured to be movable. Refers to the mechanism.

  In general, a link that rotates is called a crank, a link that swings is called a lever, and a link that connects the lever and the crank is called a connecting rod. The crank is the minimum length link. In addition, the above-mentioned kinematic pair refers to a combination portion of contact portions in contact with each other in a configuration in which adjacent links move in contact with each other. In the configuration described above, the crank corresponds to the crank member, the lever corresponds to the lever member, the connecting rod corresponds to the connecting member, and the fixed link corresponds to the fixed member.

  In the above-described lever crank mechanism, the connecting member swings in the punching direction of the punch by the rotational movement of the crank member. Then, when the connecting member swings in the punching direction, the punch connected to the connecting member is driven to punch. Therefore, the driving force transmitted as the output from the switching mechanism can be transmitted as the input to the crank member, so that the driving force from the driving source can be transmitted to the punch mechanisms A and B via the switching mechanism. They can be transmitted to the respective lever crank mechanisms to drive them.

  When the connecting member swings, the punch attached thereto is driven in the drilling direction following the swinging of the connecting member in the punching direction. For this reason, the loss of the driving force transmitted from the driving source for driving the punch to be drilled is suppressed to the minimum because the direction of the action is not largely changed. Furthermore, since the loss of the driving force is reduced and the driving source can be reduced in size, the load applied to the driving mechanism portion related to the punching driving of the punch is reduced. Therefore, it is more effective as the number of punches attached to the connecting member is increased, and the higher the effect can be achieved, for example, when applied to a sheet material punching device that punches 2 holes, 3 holes, 4 holes, and more holes. .

  Further, one or more punches are attached to the connecting member constituting the lever crank mechanism, and the connecting member is arranged along the sheet material width direction to form a hole row for punching the sheet material. A punch row is formed. The connecting member is located between the crank member and the lever member, and can swing in the punching direction of the punch by the rotational movement of the crank member. Here, the punching direction of the punch is a direction orthogonal to the sheet surface of the sheet material, and corresponds to a direction substantially orthogonal to the sheet material placement surface of the fixing member serving as a fixed link.

  Therefore, by attaching the punch to the connecting member, the punch can be directly driven in the drilling direction without changing the direction of the driving force. In addition, when attaching a punch with respect to a connection member, it can also be set as a structure which provides a shaft member etc. in a punch and is directly attached to a connection member, for example, a punch latching means is provided between a punch and a connection member. It can be configured to be provided and attached.

  Depending on the manner of connection between the switching mechanism described above and the lever crank mechanism provided in each of the punch mechanisms A and B, the standby position after punch punching may become unstable. For example, in the case of a switching mechanism portion to which the main driving portion and the driven portion configured by using the meshing of the tooth profile described above are applied, when the tooth on the main driving portion rides on and rides over the tooth on the driven portion side, the tooth profile of the driven portion A load (hereinafter referred to as “overcoming reaction force”) acts in a direction against overcoming. At this time, although the tooth profile of the driven portion does not necessarily rotate even if the overcoming reaction force acts, if it is rotated, the crank member forming the lever crank mechanism connected to the driven portion will rotate, The punch is driven to drill.

  When there is a possibility that such unintentional punch swing may occur, a swing prevention mechanism (hereinafter referred to as a detent mechanism) with respect to the crank member or the lever member in configuring the crank member or the lever member constituting the lever crank mechanism. It is desirable to suppress unnecessary swing of the crank member or the lever member. For example, using the elastic force of the spring or the pressing force of the cam, a convex portion is provided on one side and a concave portion corresponding to the convex shape is provided on the other side at a desired location, and the fitting state of the convex portion into the concave portion is maintained. A detent mechanism in which the fitting state can be eliminated by the driving force transmitted by connecting the driven portion to the main driving portion can be applied.

Next, the sheet material punching apparatus according to the present invention will be described in detail with specific configurations that the inventor considers suitable.
FIG. 1 shows a sheet material punching device 1 (hereinafter referred to as a punching device 1) having two sets of punch mechanism portions A and B as an example of the present invention. FIG. 1A shows a standby state of the punching device 1 from a viewpoint from above, and FIG. 1B shows a viewpoint from a sheet passing direction of a sheet material (not shown). 2A is an enlarged view of the switching mechanism portion C shown in FIG. 1A, and FIG. 2B is an enlarged view of the vicinity of the tooth profile 43A provided in the main driving portion 43. FIG. Note that the punching device 1 is an example, and it can be appropriately selected on which side the punch mechanism portions A and B, the main driving portion and the driven portion are arranged.

  The punching device 1 shown in FIG. 1 has two sets arranged along the direction perpendicular to the sheet material conveying direction, that is, the sheet material width direction so that the respective connecting arms 6A and 6B forming the lever crank mechanism are parallel to each other. Punch mechanism portions A and B, a die frame 20, a motor 9 serving as a driving source disposed on one end side in the sheet material width direction so that the rotation shaft is in the same direction as the connecting arms 6A and 6B, and a punch mechanism And a switching mechanism C that connects the motor 9 and the punch mechanisms A and B to one end of the parts A and B, that is, one end in the sheet material width direction. The sheet material to be perforated is inserted into a narrow space along the punch row formed by the die frame 20 and the punch frame 7, and the punch row direction corresponds to the sheet material width direction.

  In the punching device 1, the punch mechanism portions A and B are each provided with one or more punches for punching a sheet material and an insulator crank mechanism for driving the punches, and form an insulator crank mechanism for the switching mechanism portion C side. It connects by each crank gear 4A, 4B. Each of the crank gears 4A and 4B can receive the driving force transmitted as an output from the switching mechanism C as an input to each of the lever crank mechanisms.

  The punch mechanism portion A is provided with two punches 2Aa and 2Ab along the longitudinal direction of the connecting arm 6A, that is, the sheet material width direction, and four die holes provided in the die frame 20 along the sheet material width direction. By engaging the two die holes 3Aa and 3Ab, two holes can be punched in the sheet material. Similarly, the punch mechanism B is provided with two punches 2Ba, 2Bb at positions different from the punches 2Aa, 2Ab along the longitudinal direction of the connecting arm 6B, and two of the four die holes described above. By meshing with the individual die holes 3Ba and 3Bb, two holes can be punched at a position different from the punching position by the punch mechanism portion A of the sheet material.

  The switching mechanism C is a mechanical mechanism that can determine whether to drive the punch mechanism B or not to drive the punch mechanism B by switching the drive direction of the drive source. As a basic configuration, the switching mechanism C in the punching apparatus 1 has both ends fixed to a frame 8 on which a motor 9 as a driving source is fixed, and the connecting arm 6A, 6B of the punch mechanism A, B in the sheet material conveying direction. The main drive unit 43 and the driven unit 44 are rotatably supported by a single shaft 42 arranged in the orthogonal direction. In the present invention, the switching mechanism portion C in the sheet material width direction is adopted by adopting the above-described configuration in which the main driving portion 43 and the driven portion 44 are disposed on one shaft 42 orthogonal to the punch mechanism portions A and B. It becomes easy to make compact.

  The main driving portion 43 disposed on the shaft 42 is connected to the gear 10 fixed to the rotation shaft of the motor 9 and is located on the punch mechanism portion A side in the shaft 42 direction, and in the shaft 42 direction. It has the gear 43b located in the punch mechanism part B side, and is comprised with the member formed integrally. The gear 43a has a tooth profile 43A protruding in the direction of the shaft 42 and is disposed in parallel with the connecting arm 6A. The gear 43a rotates in both directions with the gear 43b around the shaft 42 corresponding to the switching of the driving direction of the motor 9. It is possible. And the gear 43a which comprises the main drive part 43 can be connected with respect to the driven part 44 side in the location of the tooth profile 43A.

  The driven portion 44 disposed on the shaft 42 includes a gear 44a that has a tooth profile 44A protruding in the direction of the shaft 42 and is disposed in parallel with the connecting arm 6A. In the direction of the shaft 42, the tooth profile 44A of the driven portion 44 is disposed opposite to the tooth profile 43A of the main driving portion 43 and is appropriately pressed toward the main driving portion 43 by the elastic force of the spring 41A. In addition, the main driving portion 43 is also pressed to the driven portion 44 side by the spring 41B so as to properly balance the pressing by the spring 41A. In the case of the configuration shown in FIG. 2, it is sufficient that the main driving portion 43 does not easily retreat from the meshing position with the driven portion 44. A cylindrical member having a predetermined length is used instead of the spring 41 </ b> B. It may be provided.

  In the switching mechanism C, the gear 44a provided in the driven portion 44 is coupled to the gear 44a provided in the driven portion 44 by the two-stage gear 11A that is pivotally supported by the shaft 19A and arranged in parallel with the connecting arm 6A. A two-stage gear 11B that is pivotally supported by a shaft 19B and arranged in parallel with the connecting arm 6B is connected to 43b. Then, the crank gear 4A, which is pivotally supported by the shaft 12A with respect to the second gear 11A and connected in parallel with the connecting arm 6A, is connected, and is supported by the shaft 12B with respect to the second gear 11B. The crank gear 4B arranged in parallel is connected.

  Accordingly, the driving force of the motor 9 as a driving source is first transmitted to the gear 43a constituting the main driving portion 43 and the gear 43b formed integrally with the gear 43a via the gear 10, and further to the two-stage gear 11B. Is transmitted to the crank gear 4B on the punch mechanism B side. Alternatively, when the driven portion 44 is connected to the main driving portion 43, simultaneously, the driving force transmitted to the gear 43a constituting the main driving portion 43 is transmitted to the driven portion 44 via the tooth profile 43A, and further two steps. It is transmitted to the crank gear 4A on the punch mechanism part A side via the gear 11A.

  The tooth profile 43 </ b> A of the main driving portion 43 that protrudes toward the driven portion 44 side and the tooth profile 44 </ b> A of the driven portion 44 that protrudes toward the main driving portion 43, which are related to the connection configuration of the main driving portion 43 and the driven portion 44 described above. It has an equivalent configuration and includes eight teeth in an annular shape around a shaft 42 that penetrates itself. Each tooth in the tooth profile 43A is a tooth formed with the front tooth surface 43Aa on the front side and the rear tooth surface 43Ab on the rear side as the main surfaces in the rotation direction of the main driving portion 43 to which the driven portion 44 is connected. Has a shape. Further, in each tooth in the tooth profile 43A, the inclination angle related to the direction of the tooth tip formed by the two main surfaces, that is, a plane perpendicular to the rotation axis serving as the rotation center of the main driving portion 43 and the plane including the front tooth surface 43Aa, that is, The inclination angle formed by the plane perpendicular to the axis 42 is about 90 degrees, and similarly, the inclination angle formed by the plane including the rear tooth surface 43Ab is about 60 degrees.

  On the other hand, the tooth profile 44A of the driven portion 44 includes eight teeth in an annular shape so as to face the tooth profile 43A of the main driving portion 43 with the shaft 42 as the center as described above. The inclination angle formed by the two main surfaces related to the direction of the tip of each tooth in the tooth profile 44 </ b> A has a tooth shape corresponding to each tooth shape in the tooth shape 43 </ b> A of the main moving portion 43. That is, in each tooth in the tooth profile 44A of the driven portion 44, the inclination angle formed by the tooth surface 44Aa corresponding to the front tooth surface 43Aa of each tooth in the tooth shape 43A of the main driving portion 43 is about 90 degrees, and similarly the rear tooth surface 43Ab. The inclination angle formed by the tooth surface 44Ab corresponding to is formed at about 60 degrees.

  In the stationary state shown in FIG. 2, the tooth profile 43A of the main driving portion 43 and the tooth profile 44A of the driven portion 44 are apparently engaged with each other by the elastic force of the springs 41A and 41B. Thereafter, when the main driving portion 43 is rotated in the direction indicated by the solid line by driving the motor 9, the individual teeth of the tooth profile 43A are brought closer to the corresponding teeth of the corresponding tooth profile 44A and the pressure contact force between the tooth surfaces is increased. Since it behaves so as to increase, the meshing state between the tooth profile 43A and the tooth profile 44A can be maintained and the driven portion 44 can be rotated. On the other hand, when the main driving portion 43 rotates in the direction of the arrow shown by the broken line by driving the motor 9, the individual teeth of the tooth profile 43A behave away from the corresponding teeth of the corresponding tooth profile 44A. Therefore, the meshing state of the tooth profile 43A and the tooth profile 44A cannot be maintained, and the driven portion 44 cannot be rotated.

  Therefore, the punching device 1 is driven simultaneously with the punch mechanism portion A connected to the driven portion 44 and the punch mechanism portion B connected to the main drive portion 43 or the main drive portion 43 by switching the driving direction of the motor 9 as a drive source. It is possible to select and switch between the one-side drive of the punch mechanism B connected to the. In the simultaneous driving of the punch mechanism parts A and B, the four punches 2Aa, 2Ab, 2Ba, and 2Bb are driven to be punched and meshed with the die holes 3Aa, 3Ab, 3Ba, and 3Bb, so that four holes can be punched in the sheet material. . Further, in the one-side drive of the punch mechanism B, the two punches 2Ba and 2Bb are driven to be punched so that the two holes can be punched in the sheet material by meshing with the die holes 3Ba and 3Bb. That is, the punching device 1 has a switching function of selecting and switching the number of punches for the sheet material to 2 holes or 4 holes by switching the drive direction of the drive source.

The switching mechanism in the present invention is not limited to the above-described configuration. For example, in the switching mechanism C described above, the arrangement of the motor 9 is reviewed, and parts such as the gear 10 that is a bevel gear and the two-stage gears 11A and 11B that are spur gears that adjust the driving speed and driving torque are replaced. FIG. 6 shows an example of the switching mechanism unit configured in the above form.
The switching mechanism unit shown in FIG. 6 includes a shaft 142 serving as a main driving unit 143 configured to be rotatable in both directions by pivotally supporting both ends of a frame 108 on which the motor 109 is fixed, and a follower having the shaft 142 as a rotation center. Part 144.

  The shaft 142 constituting the main driving portion 143 has a tooth profile 143A on the driven portion 144 side in the direction of the shaft 142 and a gear 143a on the opposite side, and is connected to both the motor 109 and the driven portion 144. Specifically, the main drive unit 143 is connected to the motor 109 via a gear 111 that is supported by a shaft 113 and a gear 112 that is supported by a shaft 142 with respect to a gear 110 fixed to the motor shaft. The driven portion 144 is connected by a tooth profile 143A and can rotate in both directions corresponding to the switching of the driving direction of the motor 109 with the shaft 142 as the rotation center. The gear 112 fixed to the shaft 142 may also be included in the main driving portion 143.

  The driven portion 144 is configured by a gear 144a having a tooth profile 144A protruding in the direction of the shaft 142. The driven portion 144 is appropriately pressed toward the main drive portion 143 by the elastic force of the spring 141A, with the tooth shape 144A disposed opposite to the tooth shape 143A of the main drive portion 143 in the shaft 142 direction. The crank gear 4A supported by the shaft 12A is connected to the gear 144a included in the driven portion 144, and the crank gear 4B supported by the shaft 12B is connected to the gear 143a included in the main driving portion 143. Thus, the driving force of the motor 109 can be transmitted to the punch mechanisms A and B.

  Specifically, when the main driving portion 143 rotates in the direction indicated by the solid line by driving the motor 109, the driving force of the motor 109 is transmitted from the gear 143a to the crank gear 4B on the punch mechanism portion B side. At the same time, since the driven portion 144 can be connected to the main driven portion 143 by the meshing of the tooth profile 143A and the tooth profile 144A and rotates, the driving force of the motor 109 is changed from the gear 144a included in the driven portion 144 to the crank gear on the punch mechanism portion A side. 4A is transmitted.

On the other hand, when the main driving portion 143 rotates in the direction indicated by the broken line by driving the motor 109, the driving force of the motor 109 is similarly transmitted from the gear 143a to the crank gear 4B on the punch mechanism portion B side. However, on the driven portion 144 side, the tooth profile 143A of the driven portion 143 and the tooth profile 144A of the driven portion 144 are not engaged with each other by riding over the teeth, and the driven portion 144 cannot be connected to the driven portion 143 and does not rotate. The driving force of the motor 109 is not transmitted to the crank gear 4A on the punch mechanism portion A side.
Therefore, even with the configuration of the switching mechanism unit shown in FIG. 6 described above, the driven unit 144 is connected to the main driving unit 143 to rotate by switching the driving direction of the motor 109 as the driving source, or the driven unit It is possible to obtain a function of preventing the rotation without connecting the 144.

Next, the lever crank mechanism provided in each of the punch mechanism portions A and B in the punching device 1 will be described.
In the punching device 1, the crank gear 4A on the punch mechanism part A side is connected to the gear 44a of the driven part 44 through the two-stage gear 11A, and the crank gear 4B on the punch mechanism part B side is driven through the two-stage gear 11B. It connects with the gear 43b of the part 43. FIG. Specifically, the punch mechanism A includes a crank gear 4A serving as a rotating crank member, and a swing arm 5A serving as a lever member pivotally supported by a pin 14 so that one end can swing. The connecting arm 6A that connects the swing arm 5A and the crank gear 4A and that is a connecting member provided with the punches 2Aa and 2Ab, the punch frame 7 that is disposed opposite to the sheet surface of the sheet material, and the above-mentioned member that connects these members It is constituted by a pin 14 and a pin 15A.

  Similarly, the punch mechanism B includes a crank gear 4B serving as a rotating crank member, a swing arm 5B serving as a lever member pivotally supported by a pin 14 so that one end can swing, and a swing arm 5B. The connecting arm 6B that connects the moving arm 5B and the crank gear 4B and is a connecting member provided with the punches 2Ba and 2Bb, the punch frame 7 that is a fixing member by the frame 8, and the pin 14 that connects these members and It is comprised by the pin 15B.

  The crank gears 4A and 4B on the input side of the driving force in the lever crank mechanism are provided with drive pins 13A and 13B at predetermined spaced positions from the shafts 12A and 12B, respectively, and are configured to be rotatable around the shafts 12A and 12B, respectively. The Then, when the crank gears 4A and 4B rotate through the switching mechanism C by the rotation of the motor 9, the drive pins 13A and 13B can rotate and draw a rotation locus with a predetermined rotation radius. Therefore, the crank gears 4A and 4B can have a function as a crank and serve as a crank member that forms a lever crank mechanism.

  The connecting arms 6A and 6B are connected to the drive pins 13A and 13B included in the crank gears 4A and 4B, and are connected to the swinging arms 5A and 5B by the pins 15A and 15B, and the die holes 3Aa and 3Ab. It arrange | positions along the hole row direction. With this configuration, the connecting arms 6A and 6B swing the drive pins 13A and 13B and the pins 15A and 15B while connecting the drive pins 13A and 13B of the crank gears 4A and 4B and the swing arms 5A and 5B. It can swing as a fulcrum. Accordingly, the connecting arms 6A and 6B can have a function as connecting rods, and become connecting members that form a lever crank mechanism.

  The swing arms 5A and 5B are fixed at one end to the pin 14 pivotally supported by the punch frame 7, and the other end is connected to the connecting arms 6A and 6B by the pins 15A and 15B. The pin 14 is supported by the punch frame 7 so as to be rotatable. With this configuration, the swing arms 5A and 5B can swing about the pin 14 as a swing fulcrum. Therefore, the swing arms 5A and 5B can have a function as a lever and become a lever member that forms a lever crank mechanism. Note that one end of the swing arms 5A and 5B may be supported using any of the fixing members described later having a function as a fixed link.

  The pin 14 is fixedly provided with a detent cam 50A that rotates synchronously with the swing arm 5A and a detent cam 50B that rotates synchronously with the swing arm 5B. The punch frame 7 is fixedly provided with detent springs 51A and 51B having protrusions that can be fitted into the respective recesses formed in the detent cams 50A and 50B. With this configuration, when the pin 14 moves and either of the convex portions of the detent springs 51A and 51B or both of them fit into the concave portions of the detent cams 50A and 50B, the convex portions are removed from the concave portions. Unless a driving force that can be removed acts on the pin 14, the swing arms 5A and 5B cannot swing from their positions and are prevented from swinging. Accordingly, the connecting arms 6A and 6B connected to the swing arms 5A and 5B and the crank gears 4A and 4B connected to the connecting arms 6A and 6B are also prevented from shaking.

  In the punching device 1, the function as a fixed link in the lever crank mechanism is that the punch frame 7 supports one end of the swing arms 5A and 5B, and the shafts 12A and 12B fixed to the frame 8 support the crank gears 4A and 4B. It is obtained by a structure that supports and assembles the punch frame 7 and the frame 8 together. Furthermore, the die frame 20 can also function as a fixed link by being assembled integrally with the punch frame 7. The punch frame 7 and the die frame 20 can be configured to be shared by the punch mechanism portions A and B. The punch frame 7, the frame 8, and the die frame 20 become a fixing member in the punching device 1 by being integrated as a structure.

  In the punching apparatus 1, as described above, the two punches 2Aa and 2Ab are attached to the connecting arm 6A, and the two punches 2Ba and 2Bb are attached to the connecting arm 6B. The punches 2Aa and 2Ab are fixed by penetrating punch pins 31Aa and 31Ab through punch mounting portions 30Aa and 30Ab provided at one end opposite to the blade edge. The relationship between the punch mounting portions 30Ba and 30Bb and the punch pins 31Ba and 31Bb with respect to the punches 2Ba and 2Bb is the same. And punch attachment part 30Aa, 30Ab is latched by latching pin 18Aa, 18Ab which connects two long holes 17Aa, 17Ab provided in the connection arm 6A penetrated. Similarly, the punch mounting portions 30Ba and 30Bb are locked by the locking pins 18Ba and 18Bb communicating with the two long holes 17Ba and 17Bb provided in the connecting arm 6B penetrating.

  The punches 2Aa, 2Ab, 2Ba, and 2Bb are inserted into punch guide portions 16Aa, 16Ab, 16Ba, and 16Bb provided on the punch frame 7, and are guided so as to be movable in the punching direction and the separating direction. The elongated holes 17Aa, 17Ab, 17Ba, and 17Bb provided in the connecting arms 6A and 6B are provided with predetermined inclinations that are suitable for the inclination so that the inclination angles become larger as they approach the crank gears 4A and 4B. ing.

  When the connecting arms 6A, 6B approach in the punching direction, the swinging connecting arms 6A, 6B do not move while maintaining parallel to the sheet material, so the sheet material and the respective punches 2Aa, 2Ab, 2Ba The distance from the 2Bb cutting edge varies depending on the attachment position in the longitudinal direction of the connecting arms 6A and 6B. Therefore, in order to approximate the movement amount of each punch 2Aa, 2Ab, 2Ba, 2Bb to the equivalent amount, the inclination angle of the long holes 17Aa, 17Ab, 17Ba, 17Bb is set corresponding to the difference in the attachment position. It is desirable to adjust.

  As described above, in the punching device 1, in the punch mechanism portion A, the crank gear 4A, the drive pin 13A, the connecting arm 6A, the pin 15A, and the swing arm 5A are connected to form the fixed link. The center of rotation, that is, between the axis of the shaft 12A and the axis of the pin 14 is fixed by the punch frame 7 and the frame 8, and by this configuration, the punch 2Aa, 2Ab by interlocking of the crank gear 4A, the connecting arm 6A, and the swing arm 5A Can be driven. Similarly, in the punch mechanism portion B, the crank gear 4B, the drive pin 13B, the connecting arm 6B, the pin 15B, and the swing arm 5B are connected to each other so as to form a fixed link, that is, the rotation center of the crank gear 4B, Between the shaft 12B axis and the pin 14 axis is fixed by the punch frame 7 and the frame 8, and by this configuration, the punch 2Ba and 2Bb are driven to be drilled by interlocking the crank gear 4B, the connecting arm 6B, and the swinging arm 5B. It becomes possible.

Regarding the above-described lever crank mechanism according to the present invention, the mechanistic features and preferred configurations will be described by taking the punch mechanism portion A as an example. The same applies to the punch mechanism B unless otherwise specified.
In the present invention, the lever crank mechanism arranges each member so that the relationship of the formula: (CA + RA) <(LA + FA) is established. Where CA is the distance between the axis of the drive pin 13A and the axis of the shaft 12A, RA is the distance between the axis of the drive pin 13A and the axis of the pin 15A, and LA is the axis of the pin 14 and the axis of the pin 15A. The distance between the centers, FA, is the distance between the axis of the shaft 12A and the axis of the pin 14.

  In this arrangement, the punch can be driven more stably by establishing the relationship of the formula: LA> CA. The pin 14 corresponds to the pair of insulators, the rotation center of the crank gear 4A, that is, the axis of the shaft 12A corresponds to the pair of cranks, and the separation distance between the shaft center of the shaft 12A and the pin 14 is the fixed link. Corresponds to the length of.

  Further, the positional relationship between the drive pin 13A and the swing arm 5A according to the rotation angle of the crank gear 4A is determined so that the swing arm 5A is seated when the connecting arm 6A is positioned in a horizontal state with respect to the sheet surface of the sheet material. It is desirable to adjust so that it can be positioned perpendicular to the surface. When a driving force is applied to the lever crank mechanism, the posture of the swing arm 5A approaches the horizontal state from the vertical state with respect to the seat surface by the swing. At this time, the driving force in the direction perpendicular to the seat surface generated in the connecting arm 6A is gradually increased by the movements of the crank gear 4A and the swing arm 5A.

  Therefore, when the punches 2Aa and 2Ab are driven to perforate the sheet material by the swinging of the connecting arm 6A by the swinging of the swinging arm 5A, the swinging arm 5A is in the vertical position with respect to the sheet surface as much as possible. A large drilling force can be obtained by making the posture close to. In addition, a large amount of movement can be obtained with respect to the punching direction of the punches 2Aa and 2Ab, which is effective for making the sheet material punching device compact.

  Further, when the punching device 1 is in a standby state before punching, the swing arm 5A is as vertical as possible with respect to the sheet surface of the sheet material, and the attachment points of the punches 2Aa and 2Ab in the connecting arm 6A are as horizontal as possible. In addition, it is desirable that the rotation center of the crank gear 4A, that is, the axis of the shaft 12A and the axis of the drive pin 13A be positioned as horizontally as possible. With this configuration, the connecting arm 6A can be swung while maintaining a substantially horizontal posture with respect to the sheet surface, the space volume required for the operation of the connecting arm 6A can be reduced, and the sheet material punching apparatus can be made compact.

  In addition, in the connecting arm 6A, by increasing the movement amount of the punch 2Aa on the swing arm 5A side in the punching direction, it is possible to approximate the movement amounts of the respective punches 2Aa and 2Ab in the punching direction. As a result, it is possible to share the members related to the punch itself and the punch guide portion, which is effective in reducing the cost of the sheet material punching device.

  Next, the punching operation of the sheet material punching apparatus according to the present invention will be described with reference to FIGS. 3, two sets of punch mechanism portions A and B of the punching device 1 are driven simultaneously, and after reaching the lowest position after punching four holes in the sheet material from the standby position shown in FIG. Indicates the state. FIG. 4 is a diagram showing a state in which only the punch mechanism portion B of the punching device 1 is driven, and two holes are punched in the sheet material from the standby position shown in FIG. It is shown from the viewpoint in the opposite direction to 1 (b). FIG. 5 shows a series of punching operations when four holes are punched in the sheet material using the punching device 1. However, in order to clarify the configuration, the sheet material is omitted in each drawing, the switching mechanism C and punch mechanism B in FIG. 5, the detent cam 50B and the detent spring 51B in FIG. 3, and the detent in FIG. The cam 50A and the detent spring 51A are abbreviated.

  In the punching device 1, the tooth profile 44 </ b> A of the driven portion 44 pressed by the spring 41 </ b> A is apparently engaged with the tooth profile 43 </ b> A of the main driving portion 43 before the motor 9 is started. When the main driving portion 43 starts to rotate in the direction of the arrow shown by the solid line in FIG. 2 through the gear 10 by driving the motor 9, the tooth profile 43A of the main driving portion 43 generates the contact pressure between the tooth surfaces of the tooth profile 44A of the driven portion 44. It behaves in the direction of increasing, and the engagement between the tooth profile 43A and the tooth profile 44A is strengthened. Thereafter, as long as the motor 9 continues to drive in this direction, the meshing state of the tooth profile 43A and the tooth profile 44A is maintained. Accordingly, the driven portion 44 can be reliably connected to the main moving portion 43 and can rotate in the arrow direction indicated by the solid line.

  On the other hand, in the punching device 1, when the main driving portion 43 starts to rotate in the direction of the arrow indicated by the broken line in FIG. 2 through the gear 10 by driving the motor 9, the tooth profile 43A of the main driving portion 43 is in contact with the tooth profile 44A of the driven portion 44. It behaves in the direction of separating the tooth surfaces, and the engagement between the tooth profile 43A and the tooth profile 44A is eliminated. Finally, the individual teeth of the tooth profile 43A of the main driving portion 43 ride on and get over the individual teeth of the tooth profile 44A of the driven portion 44. Thereafter, as long as the motor 9 continues to drive in that direction, the tooth profile 43A and the tooth profile 44A cannot mesh as described above. Accordingly, the driven portion 44 cannot be connected to the main moving portion 43 and thus does not rotate.

  Further, the punching device 1 is configured such that the convex portion of the detent spring 51A is fitted into the concave portion of the detent cam 50A when the punch mechanism portion A side is in the standby position. This configuration acts as a detent mechanism in the lever crank mechanism on the punch mechanism part A side, and the swing arm 5A is prevented from swinging and cannot swing, so the crank connected to the swing arm 5A via the connecting arm 6A. The gear 4A cannot also rotate. Therefore, the punch mechanism portion A is not driven to be punched by the above-described overcoming reaction force.

Hereinafter, a series of punching operations of the punch mechanisms A and B by the rotation of the main driving unit 43 and the driven unit 44 described above will be described.
In the drilling device 1, when the main driving portion 43 is rotated by driving the motor 9 and the gear 43a starts to rotate in the arrow direction indicated by the solid line, the tooth profile 43A and the tooth profile 44A are engaged with each other, and the driven portion 44 rotates in the arrow direction indicated by the solid line. Then, the crank gear 4A starts to rotate in the direction indicated by the solid line via the two-stage gear 11A. At the same time, the gear 43b starts to rotate in the arrow direction indicated by the solid line due to the rotation of the main driving portion 43, so that the crank gear 4B further starts to rotate in the arrow direction indicated by the solid line via the two-stage gear 11B.

Accordingly, in this case, the two punch mechanism portions A and B are driven to punch simultaneously, and the punching operations of the punch mechanism portions A and B thereafter are the same. In addition, in the punching device 1, each of the long holes 17Aa, 17Ab, 17Ba, 17Bb is adjusted so that the movement amount of each punch 2Aa, 2Ab, 2Ba, 2Bb and the positional relationship with the sheet surface are appropriate. The tilt angle is adjusted.
Since the punching operations of the punch mechanism portions A and B are the same, the punch mechanism portion A side is used to describe the punch crank mechanism and punch punching operation, and the punch mechanism portion B side is not described.

  In the punch mechanism portion A, the drive pin 13A rotates while drawing a rotation locus with a predetermined rotation radius by the rotation of the crank gear 4A described above, that is, the rotation indicated by the arrow 49 in FIG. As a result, the connecting arm 6A starts to swing in the punching direction. At this time, since the tooth profile 43A of the main driving portion 43 and the tooth profile 44A of the driven portion 44 are sufficiently meshed with each other, a driving force is transmitted so that the convex portion of the detent spring 51A can be detached from the concave portion of the detent cam 50A.

  Further, when the driving pin 13A rotates, the connecting arm 6A shown in FIG. 5A, which is in a horizontal posture with respect to the sheet surface of the sheet material, is connected to the driving pin 13A of the crank gear 4A. The one end side of the head follows the rotational motion of the drive pin 13A and moves in a direction away from the sheet material. When attention is paid to the other end side connected to the swing arm 5A of the connecting arm 6A by the pin 15A, the pin 15A side of the swing arm 5A moves in the direction intersecting the drilling direction with the pin 14 as a swing fulcrum. The pin 15A side of the connecting arm 6A moves as if following the movement of the swinging arm 5A so as to approach the sheet material. With the operation described above, the drive pin 13A passes through the position of the uppermost point, and the crank gear 4A rotates up to about 120 degrees from the position in the standby state before drilling, resulting in the state shown in FIG.

  When the connecting arm 6A is in the state shown in FIG. 5B, the punch 2Aa located on the swing arm 5A side is slightly more sheet material than the punch 2Aa in the standby position shown in FIG. 5A. It is moving in the direction of approaching. Further, the punch 2Ab located on the crank gear 4A side moves slightly away from the sheet material than the punch 2Ab at the standby position. When the crank gear 4A further rotates in the direction indicated by the arrow 49 from this state, both the drive pin 13A side and the pin 15A side of the connecting arm 6A move in the direction approaching the sheet material, so that the two punches 2Aa, 2Ab Both move toward the sheet material.

  At this time, by adjusting the rotation radius of the drive pin 13A of the crank gear 4A, the position of the shaft 12A, and the length of the swing arm 5A, the timing of the movement of the connecting arm 6A in the direction approaching the sheet material as described above. Since the driving pin 13A side and the pin 15A side can be made different, the punching driving of the two punches 2Aa and 2Ab can be set at different timings. By perforating the sheet material with individual punches at different timings, it is possible to perform perforation with a smaller perforation force, reduce the driving force, and reduce the size of the drive source.

  In the punch mechanism part A of the punching device 1, the two punches 2Aa and 2Ab are driven to punch at different timings. When the rotation of the crank gear 4A reaches about 120 degrees shown in FIG. 5B, first, the cutting edge of the punch 2Aa reaches the die hole 3Aa. When the rotation of the crank gear 4A reaches about 150 degrees shown in FIG. 5C, the cutting edge of the punch 2Ab reaches the die hole 3Ab. When the crank gear 4A rotates to about 150 degrees, the angle formed by the swing arm 5A and the connecting arm 6A at the pin 15A is about 155 degrees, and the swing angle of the swing arm 5A is shown in FIG. It is set to be about 65 degrees from the position of the state shown in a).

  Further, until the rotation of the crank gear 4A reaches a state exceeding 170 degrees shown in FIG. 5D, the two holes 2Aa and 2Ab are completely punched into the sheet material. Thereafter, as the crank gear 4A rotates, the connecting arm 6A changes its direction of movement away from the sheet material after the pin 15A side reaches the position of the lowest point, and then the two punches 2Aa and 2Ab After reaching the position of the lowest point, it moves so as to turn the moving direction.

  In the above-described series of punching operations of the punch mechanism A, the movement of the two punches 2Aa and 2Ab depends on the length of each punch 2Aa and 2Ab, the presence or absence of the inclination of the long holes 17Aa and 17Ab, and the inclination angle. It can be adjusted by changing the For example, as in the drilling device 1 shown in FIG. 1B, the long holes 17Aa and 17Ab are inclined, and the inclination angle is set so that the inclination of the long holes 17Aa and 17Ab closer to the crank gear 4A becomes larger. By making the difference, the movement amounts of the respective punches 2Aa and 2Ab can be adjusted to be substantially the same. Thereby, it is possible to share the members such as the punch guide portions 16Aa and 16Ab related to the respective punches 2Aa and 2Ab.

  Therefore, in the punching device 1, in the switching mechanism C, when the motor 9 as a drive source is driven one way and the main driving unit 43 rotates in the direction indicated by the solid line in FIG. 2, the main driving unit 43 rotates and the driven unit 44 is connected to the main driving portion 43 and rotates at the same time, so that the lever crank mechanism of the punch mechanism portions A and B is simultaneously driven, and all four punches 2Aa, 2Ab, 2Ba, and 2Bb are driven to punch, and the sheet material 4 holes can be drilled. Alternatively, by switching the driving direction of the motor 9 that is a driving source, when the motor 9 is driven in the other direction and the main driving portion 43 rotates in the direction indicated by the broken line, the driven portion 44 rotates without being connected to the main driving portion 43. Therefore, the lever crank mechanism of the punch mechanism portion B connected to the main moving portion 43 is driven on one side, and the two punches 2Ba and 2Bb are driven to punch, so that two holes can be punched in the sheet material.

  As described above, according to the switching mechanism portion of the present invention, the driving of the two sets of punch mechanism portions A and B is selected by switching the driving direction of the drive source, and the punches provided in each of the punch mechanism portions A and B are simultaneously punched. It is possible to obtain a sheet material punching device having a switching mechanism that can be driven to punch a sheet material or can punch-drive a punch provided in the punch mechanism B to punch a sheet material. In addition, according to the punch mechanism portion to which the lever crank mechanism according to the present invention is applied, it is possible to simplify the punching driving mechanism of the punch, reduce the conversion loss of the driving force, and reduce the size of the driving source thereby. An excellent sheet material punching device can be obtained in terms of compactness, energy saving and cost.

  Therefore, for example, the punch mechanism portions A and B are adapted to correspond to the punching positions in the sheet material in order to enable switching between the two holes and the four holes when the distance between the holes used mainly in Europe is 80 mm. 4 punches in the sheet material by simultaneous driving of the punch mechanism parts A and B, or 2 holes in the sheet material by one side drive of the punch mechanism part B By selecting whether to do so, a sheet material punching apparatus as an example of the present invention having a switching function capable of selecting the number of punches for the sheet material to be 2 holes or 4 holes can be obtained.

1: punching device, A, B: punch mechanism, C: switching mechanism, 2Aa, 2Ab, 2Ba, 2Bb: punch, 3Aa, 3Ab, 3Ba, 3Bb: die hole, 4A, 4B: crank gear, 5A, 5B : Swing arm, 6A, 6B: articulated arm, 7: punch frame, 8: frame, 9: motor, 10: gear, 11A, 11B: two-stage gear, 12A, 12B: shaft, 13A, 13B: drive pin, 14: Pin, 15A, 15B: Pin, 16Aa, 16Ab, 16Ba, 16Bb: Punch guide part, 17Aa, 17Ab, 17Ba, 17Bb: Long hole, 18Aa, 18Ab, 18Ba, 18Bb: Locking pin, 19A, 19B: Shaft , 20: Die frame, 30Aa, 30Ab, 30Ba, 30Bb: Punch mounting portion, 31Aa, 31Ab, 31Ba, 31Bb: Punch pin, 1A, 41B: Spring, 42: Shaft, 43: Main drive part, 43a, 43b: Gear, 43A: Tooth profile, 43Aa: Front tooth surface, 43Ab: Rear tooth surface, 44: Drive part, 44a: Gear, 44A: Tooth profile, 44Aa 44Ab: tooth surface, 49: arrow, 50A, 50B: detent cam, 51A, 51B: detent spring, 108: frame, 109: motor, 110, 111, 112: gear, 113: shaft, 141A: spring, 142: Shaft, 143: main driving portion, 143a: gear, 143A: tooth profile, 144: driven portion, 144a: gear, 144A: tooth profile

Claims (6)

  Provided with a drive source, two sets of punch mechanism parts A and B, and a switching mechanism part, the punch mechanism parts A and B are punched into the sheet material by meshing with the die hole, and the punch is driven to punch. And a lever mechanism that rotates in both directions corresponding to the drive direction of the drive source, and the rotation mechanism is connected to the drive unit and rotates in one direction. A driven portion, wherein the driven portion is connected to an insulator crank mechanism that drives the punch mechanism portion A, and the main drive portion is connected to an insulator crank mechanism that drives the punch mechanism portion B. A sheet material punching device, wherein the punching mechanism portions A and B are switched simultaneously or the punching mechanism portion B is driven by switching the driving direction.   The main driving portion includes a plurality of teeth arranged in an annular shape, the driven portion includes a plurality of teeth corresponding to the tooth shape of the main driving portion, and the teeth included in the main driving portion and the driven portion. The sheet material punching device according to claim 1, wherein the driven portion is connected to the main driving portion and rotates by the meshing.   The tooth of the main driving portion is formed to have a front tooth surface that is a front side and a rear tooth surface that is a rear side in a rotation direction connected to the driven portion of the main driving portion, and includes the front tooth surface. The sheet material punching device according to claim 2, wherein an inclination angle formed by a rotation center of the main moving portion and a plane orthogonal to the main moving portion is 70 to 110 degrees.   The lever crank mechanism includes a crank member connected to the switching mechanism portion for rotational movement, a lever member supported at one end so as to be swingable, and a connection provided with a punch to connect the crank member and the lever member. And a fixed member that supports the rotating shaft of the crank member and the one end of the lever member, and the connecting member swings in the punching direction of the punch by the rotational movement of the crank member. The sheet material punching device according to claim 1, wherein the sheet material punching device is driven.   6. The sheet material punching device according to claim 5, further comprising a detent mechanism section that suppresses the rotational movement of the crank member or the swinging movement of the lever member in the lever crank mechanism.   Each of the punch mechanism portions A and B includes two punches, the punches of the punch mechanism portion A are arranged at both ends, and four holes are formed by simultaneous driving of the punch mechanism portions A and B. 6. The sheet material punching device according to claim 1, wherein two holes are punched in the sheet material by one side driving of the part B.