JP2011217824A - Opening and closing operation device and method of cutting object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To pinch an object at the same time as cutting it and to minimize a distance between the cut site of the object to the pinched site thereof.SOLUTION: An opening and closing operation device includes: a cylindrical body 11: a pair of cutting levers 12 that is rotatably supported at the front end of the body 11 and is provided with a cutting portion 12a at the leading end side thereof; and a cutting slider 18 that is moved by a driving mechanism 13 to perform an opening and closing operation on the cutting portion. The opening and closing operation device also includes: a pair of pinching levers 22 that is adjacent to the pair of cutting levers and is rotatably supported at the front end of the body 11 and is provided, at the leading end side thereof, with a pinching portion 22a located side by side with the cutting portion; a pinching slider 23 that is adjacent to the cutting slider 18, slidably stored in the body 11, and moved in the same direction as the cutting slider 18 to perform an opening and closing operating on the pinching portion, an energizing means 26 for energizing the pinching slider 23 in a direction of closing the pinching portion, and a relative movement restricting means 30 that restricts a relative movement of the cutting slider 18 and the pinching slider 23 and restricts an opening angle of the pinching portion from becoming smaller than that of the cutting portion.

Description

  The present invention relates to an opening / closing operation device used as an air nipper, an air clamp, or the like, and a method for cutting an object using the same.

  Conventionally, as an air nipper that is used in the assembly line of electrical parts and on the site of cutting the ears of cloth-like material, it is cut into a cylindrical body and the tip side that pivots on the front end of the body and protrudes forward from the front end of the body There is known one including a pair of cutting lever bodies formed with a portion and a cutting slider that is slidably accommodated in the body and moves by air pressure to open and close the cutting portion (for example, Patent Documents) 1). The cutting slider moves inside the body by air pressure, and the opening angle of the cutting portion is reduced by the movement of the slider, so that an object to be cut between the cutting portions can be held. Even after the object is held, by further moving the cutting slider by air pressure, the opening angle of the cutting part holding the object is further reduced, and finally the opening angle reaches zero. When the cutting blades in the cutting part come into contact with each other, the object is cut.

  On the other hand, when this air nipper is used to cut an electric wire in assembling an electronic component, etc., the air that holds the cut electric wire together with the air nipper is used in order to quickly perform a process in a subsequent process of the cut electric wire. Providing a clamp is performed. This air clamp has the same structure as the air nipper, pivotally supports a pair of clamping lever bodies that are opened and closed by air pressure at the front end of the body, and clamps the front end side of the pair of clamping lever bodies protruding forward from the front end of the body. Forming part. Such an air clamp is provided adjacent to the air nipper, and an electric wire to be cut by the air nipper is sandwiched in advance by the air clamp, and then the electric wire is cut to facilitate post-processing of the cut electric wire.

JP 2003-181163 A

  However, even if the air clamp is provided adjacent to the air nipper, the air clamp still has a problem that it cannot directly clamp the cut portion of the cut electric wire. That is, the air clamp and the air nipper are formed separately, and even if the air clamp and the air nipper, which are the separate bodies, are provided close to each other, a predetermined distance is formed between them. For this reason, even if the air clamp clamps the vicinity of the cut part of the electric wire which the air nipper cut | disconnected, the air clamp could not clamp the cut part directly. And the cut end part of the electric wire ahead of the part which the air clamp clamped became a free end part, and there existed a malfunction which became difficult to handle. In order to eliminate this point, it is conceivable to cut the free end of the previous wire held by the air clamp again for the purpose of holding the end of the wire by the air clamp, but the free end is cut again. Then, the cutting process increases, causing a problem of increasing the amount of electric wires to be discarded.

  An object of the present invention is to provide an opening / closing operation device and a method for cutting an object that can hold the object to be cut together with the cutting and can minimize the distance from the cutting portion to the portion to be held. There is to do.

  The opening / closing device of the present invention includes a cylindrical body, a pair of cutting lever bodies that are pivotally supported at the front end of the body and project forward from the front end of the body, and a slidable body. And a cutting slider that opens and closes the cutting portion by being moved by a driving mechanism.

  The characteristic configuration includes a pair of clamping lever bodies that are adjacent to the pair of cutting lever bodies and are pivotally supported at the front end of the body and formed with a clamping part aligned with the cutting part on the tip side protruding from the front end of the body, A holding slider that is slidably accommodated in the body adjacent to the slider and moves in the same direction as the cutting slider, and biases the holding slider in a direction to open and close the holding portion. The biasing means and the relative movement restricting means for restricting the relative movement of the cutting slider and the holding slider and prohibiting the opening angle of the holding portion from becoming smaller than the opening angle of the cutting portion are provided.

  The relative movement restricting means is attached to either one of the sandwiching slider and the cutting slider, the elongated hole formed extending in the moving direction, and either the sandwiching slider or the cutting slider. It is preferable to have a connecting pin that abuts the hole edge of the long hole when the opening angle matches the opening angle of the cutting part and moves through the long hole when the opening angle of the cutting part becomes smaller than the opening angle of the holding part.

  The cutting method of the object is such that a pair of cutting lever bodies are pivotally supported at the front end of the cylindrical body, and a cutting portion is formed at the front end side of the pair of cutting lever bodies protruding from the front end of the body so as to sandwich the object In this method, the object is cut by reducing the opening angle of the cutting portion.

  The characteristic point is that a pair of clamping lever bodies are pivotally supported on the front end of the body adjacent to the pair of cutting lever bodies, and the cutting part projects from the front ends of the body of the pair of clamping lever bodies when holding the object. When the object is held together with the cutting part by the holding part and the opening angle of the cutting part is reduced, the opening angle of the holding part is maintained and the holding state of the object by the holding part is maintained.

  In the opening / closing operation device and the object cutting method of the present invention, the pair of sandwiching lever bodies are pivotally supported adjacent to the pair of cutting lever bodies at the front end of the body, and the sandwiching portions protruding from the front end of the body are arranged in the cutting portion. Since it forms in this way, the cutting | disconnection end part of the target object cut | disconnected by the cutting part can be directly clamped by the clamping part. Therefore, the distance between the cutting part and the part to be sandwiched when the object is cut can be minimized, and waste generated at the end of the cutting object can be eliminated.

  Further, the relative movement restricting means restricts the relative movement of the cutting slider and the holding slider and prohibits the opening angle of the holding part from becoming smaller than the opening angle of the cutting part. The object can be held by the holding unit with a single drive mechanism, and the structure can be prevented from becoming complicated and large.

  Furthermore, when the relative movement restricting means has a long hole and a connecting pin, the relative movement restricting means can be obtained within the range occupied by the cutting slider and the sandwiching slider. The apparatus can be made compact by preventing the structure from becoming complicated and large, and can be easily incorporated into an automatic machine or the like.

It is a plane sectional view showing an opening and closing operation device of an embodiment of the present invention. It is the front view which looked at the opening-and-closing operation device from the cutting part side. It is the sectional view on the AA line of FIG. 1 which shows the relationship between the opening angle of the cutting part, and the moving amount of the cutting slider. It is the BB sectional drawing of FIG. 1 which shows the relationship between the opening angle of the clamping part, and the moving amount | distance of the slider for clamping.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 shows an opening / closing device 10 according to the present invention. The opening / closing device 10 includes a cylindrical body 11 and a pair of cutting lever bodies 12 pivotally supported at the front end of the body 11. As shown in FIG. 2, in the body 11, the second body member 11b that closes the U-shaped opening with the U-shaped opening is attached to the first body member 11a having a U-shaped cross section using a machine screw 11c. By attaching, it is formed in a rectangular tube shape.

  As shown in FIGS. 1 and 2, at the front end of the body 11, a pair of pivoting portions parallel to each other with a predetermined interval are provided to pivotally support the pair of cutting lever bodies 12 and 12 from both sides. 11d and 11d are formed to protrude forward. A female screw hole 11e for attaching the drive mechanism 13 is formed at the rear end of the body 11 so as to extend in the longitudinal direction. The drive mechanism in this embodiment is an air cylinder 13 that projects or retracts its retracting shaft 13a by supplying compressed air, and the air cylinder 13 is directed to the front in the body 11 so that the retracting shaft 13a faces forward. Screwed to the rear end.

  As shown in FIGS. 1 to 3, the pair of cutting lever bodies 12, 12 has pivot pins 14 that pass through the pair of pivot portions 11 d, 11 d while being sandwiched between the pair of pivot portions 11 d, 11 d in the body 11. As fulcrums, they are pivotally supported at the front end of the body 11 so as to intersect each other. In the pair of cutting lever bodies 12 and 12, the sides protruding forward from the front end of the body 11 are cut portions 12a and 12a, and the cutting portions 12a and 12a are provided with sharp cutting blades 12b and 12b on opposite sides. It is done. These cutting blades 12b and 12b are in a butted shape in a state where the cutting portions 12a and 12a are closest to each other, and are configured to be able to cut the cutting object 16 interposed therebetween (FIG. 3C). .

  Also, as shown in FIG. 3, in the pair of cutting lever bodies 12, 12, the side accommodated in the body 11 is the cutting input ends 12c, 12c, and these cutting input ends 12c, 12c are The opposite outer corners are formed into a smooth rounded surface. Between the cutting input ends 12c, 12c, there is provided a first opening spring 17 that urges the cutting input ends 12c, 12c so as to widen the gap between the cutting input ends 12c, 12c. The cutting portions 12a, 12a of the pair of cutting lever bodies 12, 12 pivotally supported by the shaft are always biased in the opening direction.

  The opening / closing device 10 includes a cutting slider 18 that is slidably received in the body 11 and is moved by the drive mechanism 13 to open and close the cutting portions 12a and 12a. The cutting slider 18 in this embodiment is formed in a plate shape using a resin material as a raw material, and the tip portion (the left end side in the drawing) has a tapered cutting recess whose width increases toward the tip side. 18a is formed. In the cutting recess 18a, when the cutting slider 18 moves to the front end side (the left direction in FIG. 3) of the body 11, the cutting input ends 12c and 12c of the pair of cutting lever bodies 12 and 12 are outside. It is configured to be able to come into contact with the side surface (the corner round surface). On the other hand, a locking portion 18b is formed at the rear portion of the cutting slider 18, and a groove 18c having a T-shaped cross section is formed in the locking portion 18b. Then, the connecting member 19 having the head portion 19a inserted into the groove 18c having a T-shaped cross section is attached to the projecting / retracting shaft 13a of the air cylinder 13, whereby the projecting / retracting shaft 13a of the air cylinder 13 as a drive mechanism is cut. The slider 18 is connected.

  The opening / closing operation device 10 is formed at the front end of the cutting slider 18 when the projecting shaft 13a of the air cylinder 13 as a drive mechanism protrudes, and advances to the front end side (left direction in FIG. 3) of the body 11. The cut recess 18a presses the outer side surfaces of the cutting input ends 12c, 12c of the pair of cutting lever bodies 12, 12 inward. Then, the cutting portions 12a and 12a of the pair of cutting lever bodies 12 and 12 come close to each other against the urging force of the opening first spring 17, and as shown in FIG. It is comprised so that 12b and 12b may mutually approach and the target object 16 (for example, electric wire) inserted between them can be cut | disconnected.

  On the other hand, when the projecting / retracting shaft 13a of the air cylinder 13 serving as the drive mechanism is retracted, the cutting slider 18 moves backward to the rear side of the body 11 (right direction in FIG. 3), and the pair of cutting lever bodies 12, 12 The cutting recess 18a that has pressed both outer side surfaces of the cutting input ends 12c, 12c inward is also retracted. Then, the opening first spring 17 expands the gap between the cutting input ends 12c and 12c in the pair of cutting lever bodies 12 and 12. As a result, the cutting input ends 12c and 12c of the pair of cutting lever bodies 12 and 12 are separated from each other, and as shown in FIG. 3A, the cutting portions 12a and 12a are moved to open the opening angle α. Configured to be larger.

  As shown in FIGS. 1 and 4, the opening / closing operation device 10 of the present invention includes a pair of sandwiching lever bodies 22, 22 pivotally supported at the front end of the body 11 adjacent to the pair of cutting lever bodies 12, 12, A clamping slider 23 slidably accommodated in the body 11 is provided adjacent to the cutting slider 18. The pair of sandwiching lever bodies 22 and 22 are adjacent to the pair of cutting lever bodies 12 and 12 that are pivotally supported by the pivot pin 14, and pivotally intersect each other with the pivot pin 14 as a fulcrum. Be supported. In the pair of sandwiching lever bodies 22 and 22, the sides protruding forward from the front end of the body 11 are the sandwiching portions 22 a and 22 a, and the sandwiching portions 22 a and 22 a are respectively formed with sandwiching surfaces 22 b and 22 b on opposite sides. The These clamping surfaces 22b and 22b are abutted in a state in which the clamping parts 22a and 22a are closest to each other, and are configured to be able to clamp the object 16 interposed therebetween (FIGS. 4B and 4C). )).

  Also, as shown in FIG. 4, in the pair of sandwiching lever bodies 22, 22, the side accommodated in the body 11 is the sandwiching input ends 22c, 22c, and the sandwiching input ends 22c, 22c are The opposite outer corners are formed into a smooth rounded surface. A second spring 24 for opening is provided between the clamping input ends 22c and 22c so as to expand the gap between the clamping input ends 22c and 22c. The sandwiching portions 22a and 22a of the pair of sandwiching lever bodies 22 and 22 pivotally supported by each other are always biased in the opening direction.

  Further, the sandwiching slider 23 is formed in a plate shape using a resin material in this embodiment, and a tip end portion (the left end side in the drawing) has a tapered shape whose width increases toward the tip end side. A clamping recess 23a is formed. In this clamping recess 23a, when the clamping slider 23 moves to the front end side of the body 11 (leftward in FIG. 4), the clamping input ends 22c, 22c of the pair of clamping lever bodies 22, 22 It is configured to be able to come into contact with the side surface (the corner round surface). When the sandwiching slider 23 advances to the front end side (the left direction in FIG. 3) of the body 11, the sandwiching recess 23a formed at the tip of the sandwiching slider 23 is located on both sides of the sandwiching input ends 22c and 22c. Press the side inward. Then, the clamping portions 22a and 22a of the clamping lever body come close to each other against the urging force of the opening second spring 24, and as shown in FIGS. 4B and 4C, the clamping portion 22a. , 22a is configured such that the object 16 can be clamped by pressing the clamping surfaces 22b, 22b against the object 16 (for example, an electric wire) by mutual closing movement.

  On the other hand, when the sandwiching slider 23 moves backward to the rear side of the body 11 (rightward in FIG. 4), both outer side surfaces of the sandwiching input end portions 22c and 22c of the pair of sandwiching lever bodies 22 and 22 are pressed inward. The holding recess 23a is also retracted, and the opening second spring 24 pushes and expands the gap between the holding input ends 22c and 22c of the pair of holding lever bodies 22 and 22. As a result, the sandwiching input ends 22c and 22c of the pair of sandwiching lever bodies 22 and 22 are separated from each other, and as shown in FIG. 4A, the sandwiching portions 22a and 22a are moved to open the opening angle β. Configured to be larger.

  Further, the opening / closing device 10 of the present invention restricts the relative movement of the urging means 26 for urging the nip slider 23 in the direction of closing the nip portions 22a, 22a, and the cutting slider 18 and the nip slider 23. Relative movement restriction means 30. The biasing means in this embodiment is two coil springs 26 interposed between the body 11 and the sandwiching slider 23, and the front surface is sandwiched inside the body 11 behind the sandwiching slider 23. A protrusion 11f facing the rear end face of the slider 23 is formed, and the two coil springs 26 are interposed between the protrusion 11f and the rear end face of the holding slider 23 in a compressed state. A central barrier 11g is formed continuously on the projection 11f so as to enter and separate the two coil springs 26, and the two coil springs 26 are not bent sideways by the center barrier 11g. It is inserted in a compressed state in the axial direction. Therefore, the coil spring 26 urges the holding slider 23 to push forward by the elastic force to be extended, and closes the holding portions 22a and 22a of the pair of holding lever bodies 22 and 22. Composed.

  The relative movement restricting means 30 includes a long hole 31 formed in the clamping slider 23 so as to extend in the moving direction, and a connecting pin 32 attached to the cutting slider 18. In this embodiment, two long holes 31 are formed in the holding slider 23 at a predetermined interval in the width direction, and two connecting pins 32 are also attached to the cutting slider 18 correspondingly. The connecting pin 32 has a hole edge of the long hole 31 when the opening angle β (FIG. 4) of the clamping portions 22a and 22a coincides with the opening angle α (FIG. 3) of the cutting portions 12a and 12a. Then, it contacts with the rear end edge of the long hole, and is attached at a position where it moves in the long hole 31 when the opening angle α of the cutting parts 12a, 12a becomes smaller than the opening angle β of the holding parts 22a, 22a. In this way, the relative movement restricting means 30 can open the clamping portions 22a and 22a from the opening angle α of the cutting portions 12a and 12a, that is, the angle α formed by the cutting blades 12b and 12b with the pivot pin 14 as the center. The angle β, that is, the angle β formed by the clamping surfaces 22b and 22b with the pivot pin 14 as the center is prohibited from being reduced.

  Next, a method for cutting an object in the present invention will be described.

  As shown in FIG. 3, in the method for cutting an object in the present invention, a pair of cutting lever bodies 12, 12 are pivotally supported at the front end of a cylindrical body 11 and protrude from the front end of the body 11. An opening / closing device 10 in which cutting parts 12a, 12a are formed on the distal ends of the bodies 12, 12 is used. In addition, as shown in FIG. 4, a pair of sandwiching lever bodies 22, 22 are also pivotally supported on the front end of the body 11 in the opening / closing device 10, adjacent to the pair of cutting lever bodies 12, 12. And this invention is the improvement of the cutting method which cut | disconnects the target object 16 by making small the opening angle (alpha) of the cutting parts 12a and 12a which clamped the target object 16. FIG. The characteristic point is that when the cutting parts 12a and 12a hold the object 16, the object 16 is cut by the holding parts 22a and 22a protruding from the front ends of the bodies 11 of the pair of holding lever bodies 22 and 22, respectively. 12a, and then, when the opening angle α of the cutting parts 12a, 12a is reduced, the opening angle β of the holding parts 22a, 22a is maintained to maintain the holding state of the object 16 by the holding parts 22a, 22a. It is in.

  As shown in FIG. 3, in order to hold the object 16 by the cutting parts 12a, 12a, the projecting shaft 13a of the air cylinder 13 as a drive mechanism is projected. Therefore, in a state before the object 16 is sandwiched, as shown in FIG. 3A, the retracting shaft 13a of the air cylinder 13 is immersed and the cutting portions 12a and 12a are opened. Here, the relative movement restricting means 30 prohibits the opening angle β (FIG. 4) of the holding portions 22a and 22a from becoming smaller than the opening angle α of the cutting portions 12a and 12a. In the opened state, as shown in FIG. 4A, the sandwiching portions 22a and 22a are also opened together with the cutting portions 12a and 12a. In this state, the object 16 to be cut is inserted so as to penetrate both the cutting parts 12a and 12a and the holding parts 22a and 22a opened, and then the projecting shaft 13a of the air cylinder 13 is protruded. Then, as shown in FIG. 3 (b), the cutting slider 18 advances to the front end side of the body 11, and the cutting recess 18a formed at the tip thereof is the cutting input in the pair of cutting lever bodies 12, 12. Both outer side surfaces of the end portions 12c and 12c are pressed inward. Then, the cutting portions 12 a and 12 a of the pair of cutting lever bodies 12 and 12 come close to each other against the urging force of the opening first spring 17, and the cutting portions 12 a and 12 a come into contact with the object 16. As a result, the object 16 is held.

  When the cutting slider 18 advances to the front end side of the body 11, the connecting pin 32 attached to the cutting slider 18 also advances to the front end side of the body 11, so that the connecting pin as shown in FIG. The holding slider 23 in which a long hole 31 in which 32 abuts the hole edge is formed also advances to the front end side (left side of the drawing) of the body 11 by the urging force of the coil spring 26 that is the urging means 26. Since the relative movement restricting means 30 prohibits the opening angle β of the holding portions 22a and 22a from becoming smaller than the opening angle α (FIG. 3) of the cutting portions 12a and 12a, the holding slider 23 is cut. The slider 18 is advanced to the front end side of the body 11 to gradually reduce the opening angle β of the holding portions 22a and 22a. Then, when the cutting parts 12a and 12a hold the object 16, the holding parts 22a and 22a also hold the object 16 with their holding surfaces 22b and 22b coming into contact with the object 16.

  When both the cutting parts 12a, 12a and the holding parts 22a, 22a hold the object 16, the projecting shaft 13a of the air cylinder 13 further protrudes, and the cutting slider 18 further advances to the front end side of the body 11. The cutting recess 18a formed at the tip further presses the outer side surfaces of the cutting input ends 12c, 12c in the pair of cutting lever bodies 12, 12 inward. Then, as shown in FIG. 3C, the cutting portions 12 a and 12 a of the pair of cutting lever bodies 12 and 12 further approach each other, and the cutting blades 12 b and 12 b in the cutting portions 12 a and 12 a pinch the object 16. The object 16 is cut at the stage where the cutting blades 12b and 12b are brought into contact with each other by shearing, that is, when the opening angle α of the cutting portions 12a and 12a reaches zero.

  On the other hand, as shown in FIG. 4 (b), the connecting pin 32 provided on the cutting slider 18 has a long hole when the opening angle β of the clamping portions 22a and 22a matches the opening angle α of the cutting portions 12a and 12a. Although it is in contact with the hole edge of 31, the connecting pin 32 is attached to a position where it moves in the long hole 31 when the opening angle α of the cutting parts 12 a, 12 a becomes smaller than the opening angle β of the clamping parts 22 a, 22 a. Therefore, as shown in FIG. 4C, even if the projecting shaft 13a of the air cylinder 13 is further protruded, the clamping slider 23 does not further advance directly to the left of the drawing by the air cylinder 13. The clamping slider 23 is urged so as to advance toward the front end side of the body 11 by the elastic force of the coil spring 26 that is the urging means to extend, and is clamped between the pair of clamping lever bodies 22 and 22. The parts 22a and 22a are urged to close. Thus, when the cutting parts 12a, 12a cut the object 16, the sandwiching parts 22a, 22a protruding from the front ends of the bodies 11 of the pair of sandwiching lever bodies 22, 22 are the biasing means of the coil spring 26. The object 16 is clamped by the urging force.

  The pair of sandwiching lever bodies 22 and 22 are pivotally supported by the front end of the body 11 adjacent to the pair of cutting lever bodies 12 and 12, and the sandwiching portions 22a and 22a protruding from the front end of the body 11 are the cutting sections 12a and 12a. Therefore, the sandwiching portions 22a and 22a directly sandwich the cut end portion of the object 16 cut by the cutting portions 12a and 12a. Therefore, in the present invention, when the object 16 is cut, the distance to the location where the object 16 is clamped can be minimized, and waste at the end of the object 16 can be eliminated. Further, the cutting of the object 16 by the cutting parts 12a and 12a and the holding of the object 16 by the holding parts 22a and 22a can be carried out only by projecting the projecting shaft 13a by the single air cylinder 13 which is a drive mechanism.

  The clamping unit 22a, 22a is moved to the next step with the end of the object 16 being clamped, and thereafter the clamping of the object 16 by the clamping unit 22a, 22a is canceled. This elimination is performed by immersing the retracting shaft 13a by the air cylinder 13 which is a drive mechanism. When the retracting shaft 13a is immersed, as shown in FIG. 3 (b), the cutting slider 18 moves backward to the right in the drawing, and both the cutting input ends 12c and 12c of the pair of cutting lever bodies 12 and 12 are outside. The cutting recess 18a that has pressed the side inward retreats, and the opening first spring 17 pushes and expands the gap between the cutting input ends 12c, 12c of the pair of cutting lever bodies 12, 12. Thereby, the cutting input ends 12c and 12c of the pair of cutting lever bodies 12 and 12 are separated from each other, and the cutting portions 12a and 12a are opened. On the other hand, when the cutting slider 18 moves backward, as shown in FIG. 4B, the connecting pin 32 provided in the cutting slider 18 also moves inside the long hole 31 formed in the clamping slider 23, and is clamped. When the opening angle β of the portions 22a and 22a coincides with the opening angle α of the cutting portions 12a and 12a, the connecting pin 32 comes into contact with the hole edge of the long hole 31.

  After the connecting pin 32 comes into contact with the edge of the long hole 31, as shown in FIG. 3 (a), when the retracting shaft 13a of the air cylinder 13 is further immersed, as shown in FIG. 4 (a). Then, the holding slider 23 is retracted together with the cutting slider 18, the cutting portions 12a and 12a are opened, and the holding portions 22a and 22a are also opened, and the object 16 held by the holding portions 22a and 22a is released. Therefore, even when the cutting part 12a, 12a that cuts the object 16 is opened and the holding part 22a, 22a that holds the object 16 is opened, the retracting shaft 13a by the single air cylinder 13 that is a driving mechanism is provided. It is possible to perform only by immersing, and it is possible to eliminate the need for providing a plurality of drive mechanisms 13 for opening the cutting portions 12a and 12a and the clamping portions 22a and 22a. As a result, the structure is prevented from becoming complicated and large as a whole, the apparatus itself can be manufactured in a compact manner, and it can be easily incorporated into an automatic machine or the like.

  In the present invention, since the coil spring 26 is provided as the biasing means 26 for biasing the sandwiching slider 23 in the direction in which the sandwiching portions 22a and 22a are closed, for example, the supply of air to the air cylinder 13 is performed. When the projecting shaft 13a becomes unmovable and the projecting / retracting shaft 13a becomes freely movable, the clamping slider 23 moves in the direction of closing the clamping units 22a, 22a by the urging force of the coil spring 26 so that the clamping unit 22a, 22a closes. Therefore, when the holding portions 22a and 22a hold the object 16, the holding state is maintained, and when the supply of air becomes impossible, the edge of the object 16 extends from the holding portions 22a and 22a. Such a situation can be avoided.

  Further, when the sandwiching portions 22a and 22a are not sandwiching the object 16, the holding portions come into contact with each other, and the opening angle β of the sandwiching portions 22a and 22a becomes zero. When the clamping slider 23 moves so as to close the clamping parts 22a, 22a, the cutting slider 18 also moves in the same direction by the relative movement restricting means 30, and the cutting parts 12a, 12a in the pair of cutting lever bodies 12, 12 are closed. As a result, the opening angle α of the cutting parts 12a, 12a becomes zero. Therefore, it is possible to avoid a situation in which the cutting portions 12a and 12a are opened and the sharp cutting blades 12b and 12b are exposed.

  In the embodiment described above, the drive mechanism 13 has been described using the air cylinder 13 that protrudes or immerses the protruding and retracting shaft 13a by supplying compressed air. However, the cutting slider 12a is moved to move the cutting portion 12a, A hydraulic cylinder, a fluid pressure motor, or an electrically driven servomotor may be used as the drive mechanism 13 in place of the air cylinder 13 as long as the opening / closing operation of the air cylinder 12a can be performed.

  Further, in the above-described embodiment, the case where the pair of cutting lever bodies 12 and 12 and the pair of sandwiching lever bodies 22 and 22 are pivotally supported crossing each other has been described. However, the cutting slider 18 or the sandwiching slider 23. As long as the cutting parts 12a, 12a or the holding parts 22a, 22a can be opened and closed by the movement of the pair of cutting lever bodies 12, 12 or the pair of holding lever bodies 22, 22 at the front end of the body 11 without crossing each other You may pivot.

  Furthermore, in the above-described embodiment, the relative movement restricting means 30 having the long hole 31 formed to extend in the moving direction in the clamping slider 23 and the connecting pin 32 attached to the cutting slider 18 has been described. When the opening angle β of the sandwiching portions 22a and 22a coincides with the opening angle α of the cutting portions 12a and 12a, the connecting pin 32 comes into contact with the hole edge of the long hole 31, and the cutting portion is determined from the opening angle β of the sandwiching portions 22a and 22a. As long as the opening angle α of 12a, 12a becomes small, as long as the connecting pin 32 moves in the long hole 31, the long hole 31 may be formed in the cutting slider 18 and the connecting pin 32 may be attached to the holding slider 23. . The relative movement restricting means 30 is not limited to the one composed of the long hole 31 and the connecting pin 32, but restricts the relative movement of the cutting slider 18 and the sandwiching slider 23 so as to prevent the cutting portions 12a and 12a. Other types that prohibit the opening angle β of the sandwiching portions 22a, 22a from becoming smaller than the opening angle α may be used.

DESCRIPTION OF SYMBOLS 10 Opening / closing operation apparatus 11 Body 12 Cutting lever body 12a Cutting part 13 Air cylinder (drive mechanism)
16 object 18 cutting slider 22 clamping lever body 22a clamping part 23 clamping slider 26 coil spring (biasing means)
30 Relative Movement Limiting Means 31 Long Hole 32 Connecting Pin α Opening Angle of Cutting Portion β Opening Angle of Clamping Portion

Claims (3)

A cylindrical body (11) and a pair of cutting levers that are pivotally supported at the front end of the body (11) and have cutting portions (12a, 12a) formed on the front end side protruding forward from the front end of the body (11) A body (12, 12), and a cutting slider (18) that is slidably received in the body (11) and is moved by a drive mechanism (13) to open and close the cutting portions (12a, 12a). In the opening and closing device,
Clamping to the front end of the body (11) adjacent to the pair of cutting lever bodies (12, 12) and projecting from the front end of the body (11) aligned with the cutting portions (12a, 12a) A pair of clamping lever bodies (22, 22) formed with portions (22a, 22a);
The clamping portion (22a, 22a) is opened and closed by moving in the same direction as the cutting slider (18), which is slidably accommodated in the body (11) adjacent to the cutting slider (18). A clamping slider (23),
A biasing means (26) for biasing the clamping slider (23) in a direction for closing the clamping part (22a, 22a);
Limiting the relative movement of the cutting slider (18) and the clamping slider (23), the opening angle (β) of the clamping part (22a, 22a) from the opening angle (α) of the cutting part (12a, 12a) And a relative movement restricting means (30) for prohibiting a decrease in the size of the opening / closing device. Relative movement limiting means (30)
A long hole (31) formed in one of the clamping slider (23) and the cutting slider (18) extending in the moving direction;
The opening angle (β) of the clamping portions (22a, 22a) is attached to either the clamping slider (23) or the cutting slider (18), and the opening angle (α) of the cutting portions (12a, 12a). When the opening angle (α) of the cut portion (12a, 12a) is smaller than the opening angle (β) of the clamping portion (22a, 22a). The opening / closing operation device according to claim 1, further comprising: a connecting pin (32) that moves in the elongated hole (31). A pair of cutting lever bodies (12, 12) are pivotally supported at the front end of the cylindrical body (11), and on the front end side of the pair of cutting lever bodies (12, 12) protruding from the front end of the body (11). In the method of cutting the object (16) by reducing the opening angle (α) of the cutting part (12a, 12a) where the cutting part (12a, 12a) is formed and sandwiching the object (16),
A pair of clamping lever bodies (22, 22) adjacent to the pair of cutting lever bodies (12, 12) are pivotally supported at the front end of the body (11),
When the cutting part (12a, 12a) clamps the object (16), the clamping part (22a, 22a) protrudes from the front end of the body (11) of the pair of clamping lever bodies (22, 22). Holding the object (16) together with the cutting part (12a, 12a),
When the opening angle (α) of the cutting part (12a, 12a) is reduced, the object by the clamping part (22a, 22a) is maintained while maintaining the opening angle (β) of the clamping part (22a, 22a) ( A method for cutting an object, characterized in that the clamped state of 16) is maintained.

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