JP2006095560A - Cam device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cam device in which the working accuracy with a tool mounted to a cam slide is improved and also the cam slide is moved smoothly. <P>SOLUTION: A hanging cam type cam device 1 is provided with: a cam driver 3 made so as to be fixedly supported on a cam driver support base 2; the cam slide 6 which is made so as to be brought into contact with the cam driver 3 and move in the X- and the Y-directions and also on which a small-diameter hole 4 which is situated in the rear in the X- and the Y-directions and a large-diameter hole 5 which communicates with the small-diameter hole 4 and is also situated in the front of the small-diameter hole 4 in the X- and the Y-directions are formed; a supporting means 7 for supporting the cam slide 6 freely movably in the X- and the Y-directions so that the cam slide 6 is brought into contact with the cam driver 3 and moved in the X- and the Y-directions; and an elastically energizing member 8 for elastically energizing the cam slide 6 which is supported freely movably by the supporting means 7 toward the Y-direction so as to return to the initial position of the cam slide 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cam apparatus that slides a cam slide with a cam driver and drills or bends a workpiece such as a thin plate with a tool mounted on the cam slide.

JP 2003-260526 A

  For example, in Patent Document 1, both end portions are slidably supported by a rod supported by a cam slide support base, and the upper portion is slidable so that the upper portion is held by a cam slide support base via a sliding plate. A cam device having a cam slide supported on the hood has been proposed.

  In such a cam device, since the cam slide is cantilevered with respect to the rod, the cam slide swings with respect to the direction in which the cam slide should move (relative to the longitudinal direction of the rod). Therefore, it is difficult to improve the machining accuracy of the tool mounted on the cam slide.

  Further, in such a cam device, since the upper part of the cam slide is slidably supported so as to be held on the cam slide support base via the sliding plate, there is a possibility that a large resistance force is generated against the movement of the cam slide. In addition, in the case where a return means including an elastic biasing member or the like for returning the cam slide to the initial position is provided, the return force to the initial position of the cam slide by the return means is also reduced by the resistance force. Therefore, the smooth movement of the cam slide may be hindered.

  The present invention has been made in view of the above-described points, and an object of the present invention is to improve the machining accuracy of the tool attached to the cam slide and to move the cam slide smoothly. It is to provide a cam device.

  The cam device of the present invention is moved in contact with the cam driver, a small-diameter hole located at the rear, and communicated with the small-diameter hole and located in front of the small-diameter hole. A cam slide in which a large-diameter hole is formed, support means for movably supporting the cam slide so that the cam slide is moved in contact with the cam driver, and movably supported by the support means An elastic biasing member that elastically biases the cam slide so as to return to the initial position of the cam slide, and the support means extends in the direction of movement of the cam slide and partially extends into the large-diameter hole. A cylindrical portion that is inserted and slidably supports the front portion of the cam slide at the portion inserted into the large-diameter hole, and the front end portion of the cylindrical portion is closed and a through hole is formed. Is A cylindrical member having a closed plate portion, a small diameter hole, a large diameter hole, a hollow portion of the cylindrical portion, and a through hole in the closed plate portion extending in the cam slide movement direction. A rod that slidably supports the rear portion of the cam slide at a portion inserted through the rod and supports a cylindrical member at a portion inserted through the through hole, and a rod that protrudes forward from the closing plate portion And a cam slide support base having a rear wall portion to which a rear end portion of a rod protruding rearward from the small diameter hole is attached.

  According to the cam device of the present invention, in particular, the support means extends in the cam slide movement direction and is partially inserted into the large-diameter hole, and at the portion inserted into the large-diameter hole, A cylindrical member having a cylindrical portion that slidably supports the cylindrical portion, a closed plate portion that closes the front end portion of the cylindrical portion and has a through-hole, and movement of the cam slide It extends in the direction and is inserted through the small-diameter hole, large-diameter hole, hollow part of the cylindrical part and through-hole of the blocking plate part, and the rear part of the cam slide is slidably supported at the part inserted through the small-diameter hole. And a rod that supports the cylindrical member at a portion inserted through the through-hole, and a front wall portion on which a front end portion of the rod projecting forward from the blocking plate portion and a small-diameter hole project rearward. Has a rear wall to which the rear end of the rod is mounted Since the front and rear of the cam slide can be supported at both ends by the rod and the cylindrical member, the cam slide can move in the direction in which the cam slide should move when the cam device is operated. On the other hand, the possibility of swinging (relative to the longitudinal direction of the rod) can be eliminated, and the configuration in which the upper part of the cam slide is slidably supported so as to be held on the cam slide support base via the sliding plate can be omitted. The resistance force against the movement of the cam slide can be reduced, and the resistance force against the bias of the cam slide by the elastic biasing member that elastically biases the cam slide to return to the initial position can be reduced. Thus, it is possible to improve the machining accuracy by the tool mounted on the cam slide and to move the cam slide smoothly.

  In a preferred example of the cam device of the present invention, the closing plate portion is configured to contact or be fixed to the front wall portion. According to this example, the cylindrical member can be supported more reliably, and thus the cam slide can be supported more smoothly and reliably and slidably.

  In a preferred example of the cam device of the present invention, the outer peripheral surface of the cylindrical portion is configured to slidably support the front portion of the cam slide in the large diameter hole.

  In a preferred example of the cam device of the present invention, the front end portion of the rod is detachably fitted to the front wall portion of the cam slide support base, and the rear end portion of the rod is the rear wall of the cam slide support base. It is detachably attached to the part. According to this example, the rod can be easily removed from the cam slide support base and can be easily removed from the cam slide and the cylindrical member, so that the cam device itself can be easily maintained, inspected, and replaced. Can be done.

  In a preferred example of the cam device of the present invention, the elastic urging member is disposed in the hollow portion of the cylindrical portion and the large-diameter hole of the cam slide. According to this example, the installation area of the elastic biasing member and the cylindrical member can be reduced, and the cam device can be downsized.

  In a preferred example of the cam device of the present invention, the elastic biasing member has an outer diameter smaller than the inner diameter of the cylindrical portion and an inner diameter larger than the diameter of the rod, and at one end the closing plate portion And a coil spring that is in contact with the cam slide at the other end and is disposed by surrounding the rod with a gap. According to this example, the coil spring is elastically expanded and contracted so that the coil spring does not contact the cylindrical portion and generate excessive resistance, and the coil spring contacts the rod and does not generate excessive resistance. Thus, a constant restoring force toward the initial position can be generated on the cam slide.

  In a preferred example of the cam device of the present invention, the cam driver is fixedly supported on a cam driver support base, and the cam slide is movably in contact with the sliding surface of the cam driver. The supporting means has a sliding surface complementary to the sliding surface, and the support means is guided by the sliding surface of the cam driver by the contact between the sliding surface of the cam slide and the sliding surface of the cam driver. The cam slide is movably supported so as to be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the cam apparatus which can aim at the improvement of the machining precision by the tool with which the cam slide was mounted | worn, and can move a cam slide smoothly can be provided.

  Next, an example of an embodiment of the present invention will be described in more detail based on an example shown in the figure. The present invention is not limited to these examples.

  1 to 4, a suspension cam type cam device 1 of this example includes a cam driver 3 that is fixedly supported by a cam driver support base 2, and X and Y in contact with the cam driver 3. The small-diameter hole 4 and the small-diameter hole 4 positioned rearward in the X and Y directions and the large-diameter hole 4 positioned in front of the small-diameter hole 4 in the X and Y directions. A cam slide 6 in which a diameter hole 5 is formed, and a support means 7 that supports the cam slide 6 so as to be movable in the X and Y directions so that the cam slide 6 is moved in the X and Y directions in contact with the cam driver 3. And an elastic biasing member that elastically biases the cam slide 6 supported by the support means 7 in the Y direction so as to return to the initial position of the cam slide 6 (position shown in FIG. 1). 8 and To have.

  The cam driver 3 includes a base body 11 fixed to the cam driver support base 2 by bolts, a protrusion 13 integrally formed on the inclined upper surface 12 of the base body 11, and a reverse V on the protrusion 13. And a sliding surface 14 provided in a letter shape.

  The cam slide 6 has a cam slide main body 21 in which the small diameter hole 4 and the large diameter hole 5 are formed, and an upper surface 22 of the cam slide main base 21 by an embedded bolt or the like so as to come into sliding contact with the base 47 of the cam slide support base 48. A sliding plate 23 attached, a bifurcated projecting portion 25 integrally formed on the inclined lower surface 24 of the cam slide main body 21, and a sliding surface 26 provided in an inverted V shape on the projecting portion 25 are provided. ing. A tool such as a blade tool is attached to the front surface 27 of the cam slide main body 21 via a bolt or the like. The sliding surface 26 of the cam slide 6 has a complementary shape with respect to the sliding surface 14 so as to be movable in contact with the sliding surface 14 of the cam driver 3. The small diameter hole 4 opens at the rear surface 28 of the cam slide main body 21, and the large diameter hole 5 opens at the upper part of the front surface 27 of the cam slide main body 21. A bearing 91 that is in sliding contact with the cylindrical portion 33 is fitted into a portion on the front surface 27 side of the defining surface 51 that defines the large-diameter hole 5 of the cam slide main body 21. A bearing 92 that is in sliding contact with the rod 42 is fitted on the defining surface 54 that defines the small-diameter hole 4 of the cam slide body 21.

  The support means 7 extends in the X and Y directions and is partially inserted into the large-diameter hole 5 and at the portion 31 inserted into the large-diameter hole 5, the front portion 32 of the cam slide 6 is moved in the X and Y directions. A cylindrical member 37 slidably supported on the cylindrical member 33, a cylindrical member 37 having a closed plate portion 36 in which a front end portion of the cylindrical portion 33 is closed and a through hole 35 is formed; And extends in the Y direction and is inserted into the small diameter hole 4, the large diameter hole 5, the hollow portion 38 of the cylindrical portion 33, and the through hole 35 of the blocking plate portion 36. A rod 42 that supports the rear portion 40 of the slide 6 slidably in the X and Y directions and supports the cylindrical member 37 at a portion 41 inserted through the through hole 35, and forward from the closing plate portion 36. A front wall portion 44 to which a front end portion 43 of the protruding rod 42 is mounted, a small diameter hole A cam slide support base 48 having a rear wall portion 46 on which a rear end portion 45 of the rod 42 protruding rearward from the rear wall portion 46 is mounted and a base portion 47 on which the front wall portion 44 and the rear wall portion 46 are provided. It is equipped with.

  The outer peripheral surface 52 of the cylindrical portion 33 having a shape complementary to the defining surface 51 of the cam slide main body 21 defining the large-diameter hole 5 defines the front portion 32 of the cam slide 6 in the large-diameter hole 5. It is slidably supported in the X and Y directions. The cylindrical portion 33 has a shape corresponding to the large-diameter hole 5, and in this example, has a cylindrical shape corresponding to the cylindrical large-diameter hole 5.

  The closing plate portion 36 closing the front end portion of the cylindrical tubular portion 33 has a disk shape and can be released by contact with the front wall portion 44 of the cam slide support base 48 or by a bolt, a locking mechanism, or the like. It is supposed to be fixed to. A through hole 35 through which the rod 42 is inserted is provided at the center of the closing plate portion 36.

  The outer peripheral surface of the rod 42 having a shape complementary to the defining surface 54 of the cam slide body 21 defining the small diameter hole 4 and the defining surface 55 of the closing plate portion 36 defining the through hole 35. 56 slidably supports the rear portion 40 of the cam slide 6 in the small-diameter hole 4 and the cylindrical member 37 in the through-hole 35 so as to be slidable in the X and Y directions, respectively. The front end portion 43 of the rod 42 is fitted into the front wall portion 44 of the cam slide support base 48 in the X and Y directions so as to be freely inserted and removed. The rear end portion 45 of the rod 42 is formed with a hole 61 through which the bolt 60 is inserted, and is detachably attached to the rear wall portion 46 of the cam slide support base 48 through the hole 61. It has become.

  The front wall portion 44, the rear wall portion 46, and the base portion 47 of the cam slide support base 48 define a space 67 in which the upper portion of the cam slide 6 is arranged to be movable in the X and Y directions. The base 47 is fixed to a base 66 attached to a hydraulic ram or the like by bolts or the like. A sliding plate 68 is fixed to the bottom surface 65 of the base 47, and the sliding plate 23 is in sliding contact with the surface 69 of the sliding plate 68. The cam slide 6 is prohibited from rotating in the rotational direction by the surface 69 of the sliding plate 68. A groove 71 into which the front end 43 of the rod 42 is fitted is formed in the front wall 44. The rear wall portion 46 is formed with a recess or hole in which the rear end portion 45 of the rod 42 is disposed, in this example, a recess 72. The rear end portion 45 of the rod 42 is mounted in the recess 72 of the rear wall portion 46 via a bolt 60 and a support plate 73. The rear end 45 of the rod 42 can be removed from the rear wall 46 by loosening the bolt 60 and removing the bolt 60 and the support plate 73.

  Such support means 7 is arranged so that the cam slide 6 can be moved by being guided by the sliding surface 14 of the cam driver 3 by contact between the sliding surface 26 of the cam slide 6 and the sliding surface 14 of the cam driver 3. The slide 6 is movably supported. The cam slide 6 is suspended from a cam slide support base 48 via a rod 42 and a cylindrical member 37.

  The elastic biasing member 8 has an outer diameter smaller than the inner diameter of the cylindrical portion 33 and an inner diameter larger than the diameter of the rod 42, and is connected to the closing plate portion 36 at one end and a cam at the other end. A coil spring 81 is provided which is in contact with the slide 6 and is disposed by surrounding the rod 42 with a gap in the hollow portion 38 of the cylindrical portion 33 and the large-diameter hole 5 of the cam slide 6. The coil spring 81 urges the cam slide main body 21 in the Y direction toward the rear wall 46 side.

  In the cam device 1 described above, when the hydraulic ram is operated with the cam slide 6 returned to the initial position shown in FIG. 1 and the cam slide support base 48 is lowered in the D direction together with the base 66, the cam slide 6 is moved in the X direction as shown in FIG. 4 by the contact of the sliding surface 26 with the sliding surface 14 of the cam driver 3, and thus is attached to the front surface 27 of the cam slide body 21 (FIG. For example, a bending process is performed.

  After the processing, in the cam device 1, when the hydraulic ram is reversely operated and the cam slide support base 48 is raised in the U direction together with the base 66, the cam slide 6 slides on the sliding surface 26 of the cam driver 3. As the contact with the surface 14 is released, the coil spring 81 is moved in the Y direction as shown in FIG. 1 by the elastic biasing force of the coil spring 81 to return to the initial position.

  According to the cam device 1 of the present example, the cam driver 3 is moved in contact with the cam driver 3 and communicates with the small-diameter hole 4 and the small-diameter hole 4 located at the rear and the small-diameter hole 4. A cam slide 6 in which a large-diameter hole 5 is formed in front of the cam slide 6, and support means 7 that supports the cam slide 6 so that the cam slide 6 is moved in contact with the cam driver 3. And an elastic biasing member 8 that elastically biases the cam slide 6 movably supported by the support means 7 so as to return to the initial position of the cam slide 6. The cam slide 6 extends in the moving direction and is partially inserted into the large-diameter hole 5, and the front portion 32 of the cam slide 6 is slidably supported by a portion 31 inserted into the large-diameter hole 5. Of the cylindrical part 33 and the cylindrical part 33 A cylindrical member 37 having a closing plate portion 36 that closes the end portion and in which a through hole 35 is formed, and extends in the moving direction of the cam slide 6, a small diameter hole 4, a large diameter hole 5, a cylinder The rear portion 40 of the cam slide 6 is slidably supported by a portion 39 inserted through the small-diameter hole 4 and inserted through the hollow portion 38 of the shaped portion 33 and the through-hole 35 of the closing plate portion 36. A front wall portion 44 and a small-diameter hole to which a rod 42 that supports the cylindrical member 37 at a portion 41 inserted through 35 and a front end portion 43 of the rod 42 that protrudes forward from the closing plate portion 36 are mounted. 4 and a cam slide support base 48 having a rear wall portion 46 on which a rear end portion 45 of the rod 42 protruding rearward is mounted. The front part 32 and the rear part 4 of the cam slide 6 The cam slide 6 can be supported at both ends, and the possibility that the cam slide 6 swings in the direction in which the cam device 6 should move (relative to the longitudinal direction of the rod) can be eliminated. The cam slide support base 48 can be slidably supported so as to be held via a sliding plate, the resistance to movement of the cam slide 6 can be reduced, and the cam slide 6 can be moved to the initial position. The resistance force against the biasing of the cam slide 6 by the elastic biasing member 8 that biases elastically so as to be restored can be reduced, and thus the processing accuracy by the tool mounted on the cam slide 6 is improved. And the cam slide 6 can be moved smoothly.

  According to the cam device 1, since the closing plate portion 36 comes into contact with or is fixed to the front wall portion 44, the cylindrical member 37 can be supported more reliably, and thus the cam The slide 6 can be slidably supported more smoothly and reliably.

  According to the cam device 1, the front end portion 43 of the rod 42 is detachably fitted to the front wall portion 44 of the cam slide support base 48, and the rear end portion 45 of the rod 42 is connected to the cam slide support base. Since the rod 42 is detachably mounted on the rear wall portion 46 of the 48, the rod 42 can be easily detached from the cam slide support base 48 and can be easily extracted from the cam slide 6 and the cylindrical member 37. Thus, maintenance, inspection, and parts replacement of the cam device itself can be easily performed.

  According to the cam device 1, since the elastic biasing member 8 is arranged in the hollow portion 38 of the cylindrical portion 33 and the large-diameter hole 5 of the cam slide 6, the elastic biasing member 8 and the cylindrical member 37 are not provided. The installation area can be reduced, and the cam device 1 can be downsized.

  The elastic biasing member 8 has an outer diameter smaller than the inner diameter of the cylindrical portion 33 and an inner diameter larger than the diameter of the rod 42, and is connected to the closing plate portion 36 at one end and a cam at the other end. Since the coil spring 81 is provided so as to be in contact with the slide 6 and to surround the rod 42 with a gap, the coil spring 81 does not contact the cylindrical portion 33 so as to generate an excessive resistance force. In addition, the coil spring 81 can be elastically expanded and contracted so that the coil spring 81 does not contact the rod 42 and an excessive resistance force is generated, and thus a constant return force toward the initial position is generated on the cam slide 6. Can be made.

  For example, when the large-diameter hole 5 has a polygonal shape (including a quadrangular shape, a pentagonal shape, a hexagonal shape, etc.), the tubular member 37 of the cam device 1 of this example is replaced with the tubular portion 33. A cylindrical portion having a central polygonal shape corresponding to the polygonal shape of the diameter hole 5 may be provided. In such a case, the closing plate portion 36 is fixed to the front wall portion 44 of the cam slide support base 48. In this case, the cylindrical member 37 can support the cam slide 6 so that the cam slide 6 is not rotated in the rotation direction around the rod 42, so that the upper surface 22 of the cam slide main body 21 supports the cam slide. The sliding plate 23 can be omitted from the cam slide 6 so as not to contact the base 47 of the base 48, and the resistance force generated when the cam slide 6 moves in the X and Y directions can be further reduced.

  Further, the support means 7 of the cam device 1 of the present example, for example, when the small-diameter hole 4 and the through-hole 35 are polygonal (including quadrangular, pentagonal, hexagonal, etc.), instead of the rod 42, A rod having a polygonal shape corresponding to the polygonal shape of the small-diameter hole 4 and the through-hole 35 may be provided. In such a case, the rod is connected to the front wall 44 and the rear of the cam slide support base 48. When the wall 46 is mounted so as not to rotate in the rotation direction around the rod, the rod can support the cam slide 6 so that the cam slide 6 is not rotated in the rotation direction. The sliding plate 23 is omitted from the cam slide 6 so that the upper surface 22 of the cam slide main body 21 does not come into contact with the base 47 of the cam slide support base 48, and the resistance force generated when the cam slide 6 moves in the X and Y directions is further increased. It can cause Gensa.

It is a partial cross section explanatory view of a desirable example of an embodiment of the invention. It is II-II arrow explanatory drawing of the example shown in FIG. FIG. 2 is an explanatory cross-sectional view of a portion where a cylindrical member is in contact with a cam slide in the example shown in FIG. 1. It is operation | movement explanatory drawing of the example shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cam apparatus 2 Cam driver support base 3 Cam driver 4 Small diameter hole 5 Large diameter hole 6 Cam slide 7 Support means 8 Elastic biasing member 31,39,41 Site 32 Front part 33 Cylindrical part 35 Through-hole 36 Closure board part 37 cylindrical member 38 hollow portion 40 rear portion 42 rod 43 front end portion 44 front wall portion 45 rear end portion 46 rear wall portion 47 base portion 48 cam slide support base

Claims (7)

  A cam driver, a small-diameter hole that is moved in contact with the cam driver, is located behind, and a large-diameter hole that communicates with the small-diameter hole and is located in front of the small-diameter hole is formed. A cam slide, a support means for movably supporting the cam slide so that the cam slide is moved in contact with the cam driver, and a cam slide movably supported by the support means. An elastic urging member that urges elastically so as to return to the initial position, and the supporting means extends in the moving direction of the cam slide and is partially inserted into the large-diameter hole and A cylindrical portion that slidably supports the front portion of the cam slide at a portion inserted into the diameter hole, and a closing plate portion that closes the front end portion of the cylindrical portion and is formed with a through hole Possess A cylindrical member that extends in the moving direction of the cam slide and is inserted into the small diameter hole, the large diameter hole, the hollow portion of the cylindrical portion, and the through hole of the closing plate portion, and the cam is inserted at the portion inserted through the small diameter hole. A rod that slidably supports the rear portion of the slide and supports the cylindrical member at a portion inserted through the through hole, and a front end portion of the rod protruding forward from the closing plate portion are mounted. A cam apparatus comprising: a cam slide support base having a rear wall portion to which a rear end portion of a rod protruding rearward from the front wall portion and the small diameter hole is mounted.   The cam device according to claim 1, wherein the closing plate portion is configured to contact or be fixed to the front wall portion.   The cam apparatus according to claim 1 or 2, wherein the outer peripheral surface of the cylindrical portion is configured to slidably support the front portion of the cam slide in the large-diameter hole.   The front end of the rod is detachably fitted to the front wall of the cam slide support base, and the rear end of the rod is detachably attached to the rear wall of the cam slide support base. Item 4. The cam device according to any one of Items 1 to 3.   The cam device according to any one of claims 1 to 4, wherein the elastic biasing member is disposed in a hollow portion of the cylindrical portion and a large-diameter hole of the cam slide.   The elastic biasing member has an outer diameter smaller than the inner diameter of the cylindrical portion and an inner diameter larger than the diameter of the rod, and is in contact with the closing plate portion at one end and the cam slide at the other end. The cam device according to any one of claims 1 to 5, further comprising a coil spring arranged by surrounding the rod with a gap.   The cam driver is fixedly supported on a cam driver support base, and the cam slide is a sliding surface complementary in shape to the sliding surface so as to be movably in contact with the sliding surface of the cam driver. The supporting means is movable so that the cam slide can move by being guided by the sliding surface of the cam driver by contact between the sliding surface of the cam slide and the sliding surface of the cam driver. The cam device according to any one of claims 1 to 6, wherein the cam device is supported by the cam device.

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