JP2008036649A - Press machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press machine capable of efficiently performing pressing work. <P>SOLUTION: The press machine 1 comprises a machine body 10 having a workpiece supporting unit 11 for supporting a workpiece, a pressing body 20 which is supported by the machine body 10 in a vertically movable manner so as to press the workpiece, a handle part 30 which is supported by the machine body 10 in a forwardly/backwardly turnable manner so as to vertically move the pressing body 20, and a locking device 40 which is supported by the machine body 10 to regulate the return of the handle part 30 to its initial state till the pressing stroke of the pressing body 20 exceeds a predetermined value after starting the pressing of the workpiece by the pressing body 20. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a press machine.

  Conventionally, in the case of performing a press-fitting operation of a pin to a workpiece or drilling processing, an apparatus main body having a work support portion that supports the work, and a pressing body that is supported by the apparatus main body so as to be movable up and down so that the work can be pressed A press called a hand press is used that includes a handle portion that is rotatably supported by the apparatus main body so that the pressing body can be moved up and down.

  In such a press machine, there is known a press machine further provided with a lock device that restricts the return of the handle portion to the initial state until the pressing stroke amount of the pressing body exceeds a predetermined value after the pressing of the pressing body to the workpiece is started. (See Patent Document 1). According to such a press machine, it is possible to prevent the pressing body from moving in the direction away from the work during the work of press-fitting the pin into the work and the drilling work, and to make the pressing depth of the pressing body constant. Therefore, it is possible to achieve uniform processing accuracy and maintain product quality.

  As shown in FIG. 10 and its XX sectional view (FIG. 11), the locking device provided in the press disclosed in Patent Document 1 includes a locking body 102 that rotates integrally with the handle portion 101, and A lock pin 103 that can be engaged with the locking body 102 and a first spring 104 that urges the lock pin 103 toward the center of the locking body 102 are provided. As shown in FIG. 10, the locking body 102 includes a first sliding groove 110 having a circular arc shape in plan view and a first locking hole having a circular arc shape in plan connection connected to one end of the first sliding groove 110. 111 and a second locking hole 113 having a second locking hole 112 connected to one end of the first locking hole 111 and extending in the center direction of the locking body 102, and a second locking A second sliding groove 114 having a circular arc shape in plan view is provided to connect one end of the hole 112 and the first sliding groove 110. In the initial state of the handle portion 101, the lock pin 103 is disposed so that the tip portion is accommodated in the first sliding groove 110, and is urged by the second spring 115 toward the locking body 102. ing.

  Next, the operation of the locking device 100 will be described. By rotating the handle portion 101 in the initial state and moving the pressing body 120 in the direction in which the workpiece is pressed (in the direction indicated by the arrow S), the lock pin 103 and the first sliding groove 110 are locked while sliding. The body 102 rotates in the arrow D direction.

  When the other end of the first locking hole 111 reaches the lock pin 103, the tip of the lock pin 103 protrudes into the first locking hole 111 by the urging force of the second spring 115. In this state, the first locking hole 111 and the lock pin 103 are engaged with each other, and the handle portion 101 is restricted from rotating in the direction in which the pressing body 120 moves away from the workpiece (the direction indicated by the arrow T) (arrow U). The locking body is restricted from rotating in the direction).

When the rotation of the locking body 102 further proceeds in the direction in which the pressing body 120 presses the workpiece (the direction indicated by the arrow S) and one end of the first locking hole 111 comes into contact with the lock pin 103, As shown in FIG. 12, the lock pin 103 moves in the second locking hole 112 by the urging force of the first spring 104 and is pushed to a position where it abuts on one end of the second locking hole 112. In this state, the engagement between the lock pin 103 and the locking portion 113 is released, and the handle portion 101 is rotated in the direction in which the pressing body 120 moves away from the workpiece (the direction indicated by the arrow T). It can be returned to the state. In the middle of rotating the handle portion 101 in the direction in which the pressing body 120 moves away from the workpiece (the direction indicated by the arrow T), the distal end portion of the lock pin 103 is connected to the second sliding groove 114 and the first sliding groove 110. It is in sliding contact. As shown in the cross-sectional view of FIG. 13, the second sliding groove 114 pushes the locking pin 103 protruding into the locking portion 113 and guides it to the first sliding groove 110, so that the tip of the locking pin 103 It is comprised so that the inclined surface 114a which can be slidably contacted with a part is provided.
European Patent No. 0622175

  However, in the press disclosed in Patent Document 1, when the engagement between the locking body and the lock pin is released, the second sliding groove is formed through the second locking hole formed in the locking body. Since it is performed by moving the lock pin, the lock pin cannot be moved smoothly due to the effect of frictional resistance between the side wall of the second locking hole and the lock pin, or due to insufficient biasing force of the first spring. There has been a problem that it is difficult to efficiently perform press work such as pin press-fitting work or hole punching work. In particular, when the influence of the frictional resistance between the side wall of the second locking hole and the lock pin becomes large, or when the urging force of the first spring becomes insufficient, the lock pin becomes one of the second locking holes. It cannot be pushed in to the end of the second, but is caught in the middle of the second locking hole. When such a situation occurs, it becomes impossible to release the engagement between the locking body and the lock pin, so it is necessary to disassemble and repair the lock device, and press work such as pin press-fitting work on the work is required. Must be stopped.

  Further, when the engagement between the lock pin and the locking portion is released and the handle portion is returned to its initial state, the lock pin is always in contact with the second sliding groove and the first sliding groove. 2. It is difficult to ensure a smooth return operation of the handle due to the frictional resistance between the sliding groove and the lock pin, and the frictional resistance between the first sliding groove and the lock pin, making it difficult to perform efficient pressing work. There was also a problem of being.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a pressing machine capable of efficiently performing a pressing operation.

  The object of the present invention is to provide an apparatus main body having a work supporting portion for supporting a work, a pressing body supported by the apparatus main body so as to be movable up and down so that the work can be pressed, and the pressing body can be moved up and down. A handle portion that is supported by the apparatus main body so as to be rotatable forward and backward, and supported by the apparatus main body until the pressing stroke amount of the pressing body exceeds a predetermined value after starting to press the work by the pressing body. And a locking device that restricts the return of the handle portion to an initial state, wherein the locking device engages with the locking device, the locking device rotating integrally with the handle device, and the locking device. A lock body that restricts the handle portion from returning to the initial state, and a release body that releases the engagement between the locking means and the lock body. Stop The lock body includes a lock portion that is urged toward the lock body and can be engaged with the lock portion, and the lock portion includes the lock body. The locking means is configured to be disengaged from the lock portion by rotating the locking means in a direction in which the workpiece is pressed, and the release body moves the lock portion outward of the lock body. A release unit that releases the engagement between the locking part and the locking part, and supports the locking body so that the locking part and the locking body do not contact each other; This is achieved by a press machine provided with a lock body support portion that maintains a disengaged state with the lock portion.

  Further, in this press machine, the locking means includes a protruding portion that protrudes toward the release body, and the release means rotates in the direction in which the pressing body presses the workpiece. A first abutting portion that abuts on the projecting portion by moving, and a second abutting portion that abuts on the projecting portion by rotating the locking means in a direction in which the pressing body separates from the workpiece. And a guide part that allows the protrusion to move between the first contact part and the second contact part, wherein the protrusion part is the first contact part or the second contact part. It is preferable that the releasing body is configured to be rotatable with the rotation of the locking means by rotating the locking means while being in contact with the contact portion.

  Moreover, it is preferable that the said guide part is a long hole in which the said protrusion part is inserted.

  The release portion includes an inclined surface that slides and moves the lock portion outwardly of the locking body when the release body rotates in a direction in which the press body presses the workpiece. It is preferable.

  ADVANTAGE OF THE INVENTION According to this invention, the press machine which can perform a press work efficiently can be provided.

  Hereinafter, the press of the present invention will be described with reference to the accompanying drawings. As shown in the perspective view of the press according to the embodiment of the present invention in FIG. 1, the press 1 includes an apparatus main body 10, a pressing body 20, a handle portion 30, and a lock device 40.

  The apparatus main body 10 is configured to support the pressing body 20, the handle part 30, and the lock device 40, and includes a work support part 11, a column part 12, and an apparatus support part 13. The work support portion 11 is a member that supports a base (not shown) to which the work is attached, and an attachment groove 14 for attaching the base is formed. The column portion 12 is a member to which the device support portion 13 is attached, and a slide groove 15 formed along the vertical direction is formed. The device support portion 13 is attached and fixed to the slide groove 15, and is configured such that the height of the device support portion 13 can be adjusted by moving the device support portion 13 along the slide groove 15.

  The pressing body 20 is configured such that a pressing member (not shown) for piercing the workpiece supported by the workpiece support portion 11 or press-fitting a pin or the like is detachably attached at the lower end portion thereof. It is supported by the device support portion 13 of the device body 10 so as to be movable up and down so that the work supported by the work support portion 11 can be pressed.

  The handle portion 30 is an operation portion that is operated by an operator when work is performed using the press machine 1 and rotates forward and backward with respect to the device support portion 13 of the device body 10 so that the pressing body 20 can be moved up and down. It is supported freely. The handle portion 30 includes an operation lever 31 held by an operator and a lever rotation shaft (not shown) that rotates as the operation lever 31 rotates.

  The locking device 40 restricts the handle portion 30 from returning to the initial state (the handle portion state shown in FIG. 1) until the pressing stroke amount of the pressing body 20 exceeds a predetermined value after the pressing body 20 starts to press the workpiece. And is supported by the device support portion 13 of the device main body 10. As shown in the cross-sectional view of FIG. 2 and the AA cross-sectional view (FIG. 3), the lock device 40 includes a rotating shaft 41, a casing 50, a locking means 60, a lock body 70, a release body 80, and a lock forcible release. A switch 90 is provided.

  The rotating shaft 41 is a rotating body that rotates integrally with the handle portion 30, and is connected to a lever rotating shaft (not shown) of the handle portion 30. The rotating shaft 41 may be configured by extending the lever rotating shaft, or may be configured to transmit the rotation of the lever rotating shaft via a gear.

  The casing 50 is a member that houses the distal end portion of the rotating shaft 41, the locking means 60, the lock body 70, the release body 80, and the like, and includes a casing main body 51 and a cover 52 that closes the opening of the casing main body 51. Yes. The casing main body 51 is formed in a bottomed cylindrical shape, and is attached to the apparatus support portion 13 of the apparatus main body 10 via a fastening member such as a bolt. A casing rotation shaft insertion hole 53 into which the rotation shaft 41 is inserted is formed at the center of the bottom portion of the casing body 51. The diameter of the casing rotation shaft insertion hole 53 is configured to be slightly larger than the diameter of the rotation shaft 41.

  The casing body 51 includes a top dead center stopper pin 54 and a bottom dead center stopper pin 55 that protrude from the bottom of the casing body 51 in parallel with the rotation shaft 41. The top dead center stopper pin 54 and the bottom dead center stopper pin 55 are provided to determine the top dead center and the bottom dead center of the pressing body 20 by restricting the rotation of the locking means 60 described later. This is a member to be brought into contact with a stopper 67 provided in the locking means 60.

  As shown in FIG. 2, the locking means 60 is fixed to the rotating shaft 41 and is configured to rotate integrally with the handle portion 30 via the rotating shaft 41. A body 65 and a protrusion 69 are provided.

  The holding member 61 is a member that holds the locking body 65 via a fastening member such as a bolt on one surface thereof, and is attached to the rotating shaft 41 while holding the locking body 65. As shown in FIG. 4 which is a BB cross-sectional view of FIG. 2, the holding member 61 is a disk-shaped member, and includes a fixing hole 62 fixed to the rotating shaft 41 at the center. The holding member 61 includes a linear slit 63 formed by connecting the outer peripheral surface thereof to the fixing hole 62, and a notch 64 having an end surface 64 a parallel to the slit 63. Bolt holes that are screwed into bolts 99 inserted from the end surfaces 64 a of the notches 64 parallel to the slits 63 are respectively formed on both sides of the slit 63. By inserting the bolt 99 into the bolt hole and advancing the screwing between the both sides of the holding member 61 sandwiching the slit 63 and the bolt 99, the distance between the both sides sandwiching the slit 63 can be reduced. As described above, the interval between the both side portions sandwiching the slit 63 is narrowed, so that the fixing hole 62 can tighten the rotating shaft 41 and fix the holding member 61 to the rotating shaft 41. As a result, the holding member 61 rotates integrally with the handle portion 30.

  As shown in FIG. 2, the locking body 65 is attached to the holding member 61 via a fastening member such as a bolt (not shown). As the rotation shaft 41 rotates, the rotation shaft 41 and the holding member 61 Rotate together. As shown in FIG. 3, the locking body 65 includes a locking body main body 66 and a stopper 67. Further, as shown in FIGS. 2 and 3, the locking body main body 66 includes a locking portion 68, a locking body rotation shaft insertion hole 66 a, and a protruding portion insertion hole 66 b.

  The locking portion 68 is formed by cutting out a part of the outer peripheral portion of the locking body main body 66. The locking portion 68 engages with the locking portion 74 of the locking body 70, and the locking means 60 rotates in the direction indicated by the arrow U in FIG. 3 (the rotation direction of the rotary shaft 41 when the pressing body 20 moves up). It is configured to prevent the handle portion 30 from moving and to restrict the handle portion 30 from returning to the initial state. The locking portion 68 includes a locking surface 68a. When the locking portion 74 of the lock body 70 contacts the locking surface 68a, the locking means 60 rotates in a direction in which the pressing body 20 moves away from the workpiece. This is restricted (turning in the direction of the arrow U is restricted). Moreover, the latching | locking part 68 is provided with the inclined surface 68b, and when the latching body 65 rotates in the direction in which the press body 20 presses a workpiece | work (the latching body 65 rotates in the arrow D direction). Therefore, the lock portion 74 is configured to slide and move outward of the locking body 65 along the inclined surface 68b.

  The locking body rotation shaft insertion hole 66 a is a through hole through which the rotation shaft 41 is inserted, and is formed at the center of the locking body main body 66. The diameter of the rotation shaft insertion hole 66a for the locking body is configured to be slightly larger than the diameter of the rotation shaft 41.

  The protruding portion insertion hole 66b is a through hole formed between the outer peripheral portion of the locking body main body portion 66 and the locking body rotating shaft insertion hole 66a, and the protruding portion 69 is inserted therethrough.

  The protrusion 69 is a member that protrudes from the one surface of the holding member 61 toward the release body 80, and is connected to the guide portion 84 provided in the release body 80 via a protrusion insertion hole 66 b formed in the locking body 65. Has been inserted.

  The stopper 67 is a member that contacts the bottom dead center stopper pin 55 or the top dead center stopper pin 54 attached to the casing body 51 during the rotation of the locking means 60. It is provided so as to protrude outward at the outer periphery of the.

  The lock body 70 is attached to the bottom of the casing body 51, and by engaging with the locking means 60, the pressing stroke amount of the pressing body 20 exceeds a predetermined value after the pressing body 20 starts pressing the work. The handle portion 30 is configured to be restricted from returning to the initial state. The lock body 70 includes a lock member 71, a support shaft 72, and an elastic pressing body 73. The lock member 71 is a plate-like member, and includes a lock portion 74 that can be engaged with the locking portion 68 of the locking body 65 at one end. The support shaft 72 is a member that rotatably supports the lock member 71 and is attached to the bottom portion of the casing body 51 between the casing rotation shaft insertion hole 53 and the peripheral peripheral edge of the bottom portion of the casing body 51. ing. The support shaft 72 supports the lock member 71 such that the other end 75 of the lock member 71 is located on the opposite side of the lock portion 74 with the support shaft 72 interposed therebetween. The elastic pressing body 73 is an elastic member that urges the lock member 71 toward the locking body 65 so that the outer peripheral surface of the locking body 65 and the lock portion 74 are in contact with each other, and one end of the elastic pressing body 73 is the side wall of the casing body 51. Further, the other end is attached to the lock member 71. As such an elastic pressing body 73, for example, a spring can be used.

  The release body 80 moves the handle portion 30 when the pressing stroke amount of the pressing body 20 exceeds a predetermined value after the pressing body 20 starts pressing the workpiece (for example, when the pressing body 20 reaches the bottom dead center). In order to return to the initial state, the engagement between the locking means 60 and the lock body 70 can be released. As shown in FIG. 2, the release body 80 is a member that is inserted so that the rotary shaft 41 is inserted, and is attached between the locking means 60 and the casing body 51 so as to be in sliding contact with the bottom portion of the casing body 51. As shown in FIG. 3, a disc-shaped release body main body portion 81 and a lock body moving portion 82 are provided. As shown in FIGS. 2 and 3, the release body main body 81 is formed between the release body rotation shaft insertion hole 83 formed at the center thereof, and the release body rotation shaft insertion hole 83 and the outer peripheral portion. The guide part 84 is provided. The releaser rotating shaft insertion hole 83 is a hole through which the rotating shaft 41 is inserted, and the diameter thereof is configured to be slightly larger than the diameter of the rotating shaft 41. With such a configuration, the release body 80 is rotatable with respect to the rotation shaft 41.

  The guide portion 84 is a long hole into which the distal end portion of the protruding portion 69 of the locking means 60 is inserted, and is formed along the circumference as shown in FIG. The arc center of the arc-shaped long hole formed along this circumference is configured to coincide with the center of the releaser rotating shaft insertion hole 83. The guide portion 84 is engaged in a first abutting portion 85 that abuts the protruding portion 69 when the locking means 60 rotates in a direction in which the pressing body 20 presses the workpiece, and in a direction in which the pressing body 20 moves away from the workpiece. A second abutting portion 86 that abuts against the projecting portion 69 by rotating the stop means 60 is provided, and the projecting portion 69 is movable between the first abutting portion 85 and the second abutting portion 86. It is comprised so that. With such a configuration, when the protruding portion 69 contacts the first contact portion 85 or the second contact portion 86 and the locking means 60 rotates, the release body 80 rotates the locking means 60. With this, it becomes possible to rotate.

  The lock body moving portion 82 is configured to protrude outward at the outer peripheral portion of the release body main body portion 81. The side surface of the lock body moving part 82 moves the lock part 74 to the outside of the locking body 65 by rotating the release body 80 together with the locking means 60 in the direction in which the pressing body 20 presses the workpiece. The release part 87 which cancels | releases engagement with the latching | locking part 68 and the lock part 74 is comprised. The release portion 87 includes an inclined surface that slides and moves the lock portion 74 outward of the locking body 65 when the release body 80 rotates in the direction in which the pressing body 20 presses the workpiece.

  Further, the outer end of the lock body moving portion 82 supports the lock body 70 so that the lock portion 74 and the locking means 60 do not contact each other, and the engagement portion 68 and the lock portion 74 are disengaged. The lock body support part 88 which maintains is comprised. It should be noted that the distance from the center of the release body rotation shaft insertion hole 83 to the lock body support portion 88 is longer than the distance from the center of the engagement body rotation shaft insertion hole 66a to the outer peripheral surface of the engagement body main body 66. It is comprised so that it may become.

  Here, the locking portion 68 provided in the locking means 60, the protruding portion 69 and the stopper 67, the guide portion 84 provided in the release body 80, the release portion 87 and the lock body support portion 88, and the lock portion 74 of the lock body 70 The positional relationship with the bottom dead center stopper pin 55 will be described. First, as shown in FIG. 5, when the protrusion 69 of the locking means 60 inserted into the guide portion 84 of the release body 80 is in contact with the first contact portion 85 of the guide portion 84, the release body 80. The release portion 87 is configured to substantially overlap the inclined surface 68 b of the locking portion 68 of the locking means 60. Further, when the stopper 67 of the locking means 60 comes into contact with the bottom dead center stopper pin 55, the lock portion 74 of the lock body 70 is pushed up by the release portion 87 of the lock body moving portion 82 of the release body 80, and the lock body It is configured to be supported by a lock body support portion 88 that is the outer end of the moving portion 82.

  In addition, as shown in FIG. 6, when the protruding portion 69 inserted into the guide portion 84 of the release body 80 is in contact with the second contact portion 86 of the guide portion 84, the locking surface of the locking portion 68. 68a is comprised with respect to the cancellation | release part 87 of the cancellation | release body 80 so that it may become the direction side (arrow U side) to which the latching means 60 rotates in the direction which the press body 20 leaves | separates from a workpiece | work.

  The lock forcible release switch 90 caused some trouble during drilling a workpiece or during press-fitting work such as a pin, and it was necessary to forcibly release the engagement between the lock body 70 and the locking means 60. It is a switch used at the time. As shown in FIG. 3, the lock forced release switch 90 includes a switch casing 91 and a switch body 95.

  The switch casing 91 is a member that is fixed on the outer surface of the casing body 51 via a fastening member such as a bolt, and is configured to have an internal space 92. In addition, a hole 93 through which a switch shaft 96 described later is inserted is formed in the upper portion of the switch casing 91.

  The switch main body 95 includes a cylindrical switch shaft 96 having a flange 96 a at the center, and a pressing head 97 attached to the base end portion of the switch shaft 96. The switch shaft 96 protrudes from a hole 93 formed at the upper portion of the switch casing 91 so that a flange 96 a provided at the center is accommodated in the internal space 92 of the switch casing 91. Are arranged to be. Further, the switch shaft 96 is disposed such that the tip end portion thereof is inserted through the switch shaft through hole 56 formed in the casing body 51. The peripheral portion of the switch shaft through hole 56 of the casing body 51 and the flange 96a are connected by a spring 98, and at the initial position of the switch body 95 (state shown in FIG. 3), the tip of the switch shaft 96 is for the switch shaft. It is urged to be disposed in the through hole 56.

  In the lock forcible release switch 90 configured as described above, the tip of the switch shaft 96 enters the casing body 51 through the switch shaft through hole 56 by pressing the pressing head 97 with a finger, a palm or the like. Then, the other end 75 of the lock body 70 is pressed. Thereby, the lock member 71 rotates around the support shaft 72, and the lock portion 74 of the lock member 71 moves in a direction away from the locking portion 68 of the locking body 65 constituting the locking means 60. The engagement between the lock portion 74 and the locking portion 68 is forcibly released.

  Next, the operation of the lock device 40 configured as described above will be described with reference to FIG. FIG. 7 is a schematic configuration diagram showing an extracted main part of the locking device 40. First, when the pressing body 20 of the press machine 1 is at the top dead center position (when the handle portion 30 is in the initial state), as shown in FIG. It is in contact with the point stopper pin 54, and the locking means 60 is restricted from rotating in the arrow U direction. Since the locking means 60 is connected to the lever rotation shaft of the handle portion 30 via the rotation shaft 41, the rotation of the locking means 60 is restricted, so that the pressing body 20 moves away from the workpiece. The part 30 is restricted from rotating. Further, the protruding portion 69 of the locking means 60 is in contact with the second contact portion 86 of the guide portion 84 of the release body 80, and the lock portion 74 of the lock body 70 is locked to the locking body 65 of the locking means 60. It is in contact with the outer peripheral surface of.

  Next, when the handle portion 30 is rotated in the direction in which the pressing body 20 presses the workpiece, the locking means 60 is rotated in the direction indicated by the arrow D via the rotation shaft 41 that transmits the rotation of the handle portion 30. To do. At this time, the projecting portion 69 inserted in the guide portion 84 moves in the guide portion 84, so that the release body 80 does not rotate with the rotation of the locking means 60, and FIG. ). Note that the locking body 65 of the locking means 60 rotates while contacting the lock portion 74 of the lock body 70 on the outer peripheral surface thereof.

  When the rotation of the handle portion 30 in the direction in which the pressing body 20 presses the workpiece proceeds, as shown in FIG. 7B, the protruding portion 69 of the locking means 60 is a guide portion 84 provided in the release body 80. The first contact portion 85 is contacted. At this time, the inclined surface 68b of the locking body 65 and the release portion 87 of the release body 80 are substantially overlapped.

  By further rotating the handle portion 30 and moving the pressing body 20 downward from the state shown in FIG. 7B, the locking means 60 and the release body 80 rotate together. When these rotations further proceed, the lock portion 74 of the lock body 70 engages with the lock portion 68 of the lock body 65 as shown in FIG. Thereby, even if it tries to rotate the handle | steering-wheel part 30 in the direction which the press body 20 leaves | separates from a workpiece | work, it will be in the locked state and it will be controlled that the handle | steering-wheel part 30 returns to an initial state.

  When the handle portion 30 is further rotated in the direction in which the pressing body 20 presses the workpiece, the lock portion 74 moves to the outside of the locking body 65 along the release portion 87 as shown in FIG. . Then, as shown in FIG. 7E, the pressing body 20 reaches the bottom dead center when the stopper 67 of the locking means 60 comes into contact with the bottom dead center stopper pin 55. At this time, the lock portion 74 of the lock body 70 slides and moves outwardly of the locking body 65 along the release portion 87 of the release body 80 so that the lock portion 74 and the locking body 65 do not contact each other. It is supported by the lock body support portion 88. In this state, the engagement between the locking means 60 and the lock body 70 is released, and the handle portion 30 can be returned to the initial state by rotating the handle portion 30 in a direction in which the pressing body 20 moves away from the workpiece.

  Next, when the handle portion 30 is rotated in a direction in which the pressing body 20 is separated from the workpiece in order to return the handle portion 30 to the initial state, the engaging portion 30 is engaged via the rotating shaft 41 that transmits the rotation of the handle portion 30. The stopping means 60 rotates in the direction indicated by the arrow U. At this time, the protrusion 69 of the locking means 60 inserted into the guide portion 84 moves in the guide portion 84, so that the release body 80 does not rotate as the locking means 60 rotates. The position shown in FIG. 7E is maintained. Accordingly, the lock portion 74 of the lock body 70 is supported by the lock body support portion 88 of the release body 80 so as not to contact the locking body 65, and the disengaged state between the locking portion 68 and the lock portion 74 is maintained. Is done.

  Then, when the handle portion 30 is further rotated to move the pressing body 20 away from the workpiece, as shown in FIG. The second abutting portion 86 of the guide portion 84. At this time, the locking part 68 of the locking body 65 in the locking means 60 is in the direction side in which the locking means 60 rotates in the direction in which the pressing body 20 moves away from the workpiece with respect to the lock part 74 of the lock body 70 ( (Arrow U side). That is, the locking portion 68 of the locking body 65 moves to a region where the locking body 65 and the locking body 70 are not engaged even if the handle portion 30 is rotated in the direction to return to the initial state. It becomes.

  By further rotating the handle portion 30 in the direction in which the pressing body 20 moves away from the workpiece from the state shown in FIG. 7F, the locking means 60 and the release body 80 rotate together. As these rotations proceed, the lock portion 74 of the lock body 70 is guided along the release portion 87 of the release body 80 to the outer peripheral surface of the lock body main body portion 66, and the lock portion 74 and the lock body main body. The outer peripheral surface of the part 66 contacts.

  Thus, according to the press 1 according to the present embodiment, the lock body 70 is moved by moving the lock portion 74 of the lock body 70 to the outside of the lock body 65 of the lock means 60 and maintaining the state thereof. Since the engagement with the locking means 60 is released, the lock can be released smoothly.

  Further, after the engagement between the lock body 70 and the locking means 60 is released, the lock portion 74 of the lock body 70 and the locking body 65 are not contacted during the return operation of the handle portion 30. Since the lock body 70 is supported by the body support portion 88, the return operation of the handle portion 30 can be performed smoothly. As a result, it is possible to perform the pressing work efficiently.

  In addition, the locking means 60 includes a protruding portion 69 that protrudes toward the release body 80, and the release body 80 includes a first contact portion 85 and a second contact portion 86, and the first contact portion 85. In addition, since the projecting portion 69 is provided between the second abutting portion 86 and the guide portion 84 is movable, the releasing body 80 can be rotated forward and backward as the locking means 60 rotates forward and backward. it can. As a result, the engagement state of the lock body 70 and the locking means 60 can be released only by the forward / reverse rotation operation of the handle portion 30, and the press work can be performed efficiently.

  Further, since the release portion 87 of the release body 80 has an inclined surface, the lock portion 74 of the lock body 70 is smoothly moved toward the outside of the locking body 65 as the release body 80 rotates. be able to. As a result, the locked state of the lock body 70 and the locking means 60 can be smoothly released, so that the pressing operation can be performed efficiently.

  Further, since the guide portion 84 provided in the release body 80 is constituted by a long hole into which the protruding portion 69 of the locking means 60 is inserted, the guide portion 84 is provided with the first contact portion 85 or the second contact portion 86 of the guide portion 84. Since the protrusion 69 can be brought into contact with certainty, the release body 80 can be reliably rotated with the rotation of the locking means 60.

  As mentioned above, although one Embodiment of this invention was described, the specific aspect of this invention is not limited to the said embodiment. In the present embodiment, the configuration in which the locking means 60 includes the holding member 61 that holds the locking body 65 is employed. However, for example, the holding member 61 is omitted and the locking portion provided with the protrusion 69 is provided. A configuration in which the body 65 is directly fixed and attached to the rotation shaft 41 may be employed.

  Further, in the present embodiment, as shown in FIG. 3, the locking body 65 employs a configuration including a single locking portion 68. However, as shown in FIG. A configuration including the portion 68 can also be adopted.

Further, in the present embodiment, the guide portion 84 is constituted by a long hole, and both end portions thereof are the first contact portion 85 and the second contact portion 86. However, the present invention is not particularly limited to such a configuration. As shown in FIG. 9, the guide portion 84 is configured to include a first contact portion 85 and a second contact portion 86 that protrude from the surface of the release body main body portion 81 toward the locking body 65 side. You can also.

It is a perspective view of the press concerning one embodiment of the present invention. It is sectional drawing of the locking device which comprises the press shown in FIG. It is sectional drawing which shows the AA cross section of FIG. It is sectional drawing which shows the BB cross section of FIG. It is explanatory drawing for demonstrating the positional relationship of the component of the locking device with which the press shown in FIG. 1 is provided. It is explanatory drawing for demonstrating the positional relationship of the component of the locking device with which the press shown in FIG. 1 is provided. It is explanatory drawing for demonstrating the action | operation of the locking device with which the press shown in FIG. 1 is provided. It is sectional drawing which shows the modification of the locking device with which the press shown in FIG. 1 is provided. It is a top view which shows the modification of the releasing body which comprises the locking device with which the press shown in FIG. 1 is provided. It is a schematic structure top view which shows the conventional press machine. It is XX sectional drawing of FIG. It is explanatory drawing which shows the process in which a lock | rock is cancelled | released in the press shown in FIG. It is sectional drawing which shows the cross section of a 2nd sliding groove.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Press machine 10 Apparatus main body 11 Work support part 20 Press body 30 Handle part 40 Locking device 50 Casing 60 Locking means 65 Locking body 68 Locking part 70 Locking body 74 Locking part 80 Release body 87 Release part 88 Locking body support part

Claims (4)

An apparatus main body having a work support portion for supporting the work;
A pressing body supported by the apparatus main body so as to be movable up and down so that the workpiece can be pressed;
A handle portion that is supported by the apparatus main body so as to be rotatable forward and backward so that the pressing body can be moved vertically;
A press that is supported by the apparatus body and includes a lock device that restricts the handle portion from returning to an initial state until the pressing stroke amount of the pressing body exceeds a predetermined value after the pressing body starts pressing the workpiece. Machine,
The locking device includes a locking unit that rotates integrally with the handle part,
A lock body that restricts the handle portion from returning to an initial state by engaging with the locking means;
A release body for releasing the engagement between the locking means and the lock body,
The locking means includes a locking body having a locking portion on an outer peripheral portion,
The lock body includes a lock portion that is biased toward the lock body and is engageable with the lock portion;
The locking portion is configured to disengage from the locking portion by rotating the locking means in a direction in which the pressing body presses the workpiece.
The release body includes a release portion that moves the lock portion outward of the lock body to release the engagement between the lock portion and the lock portion, and the lock portion and the lock body. A pressing machine including a lock body support portion that supports the lock body so as not to contact each other and maintains a disengaged state between the locking portion and the lock portion. The locking means includes a protrusion that protrudes toward the release body,
The releasing body includes a first abutting portion that abuts on the protrusion when the locking member rotates in a direction in which the pressing body presses the workpiece, and a direction in which the pressing body separates from the workpiece. The protrusion has a second abutting portion that abuts on the protruding portion by rotating the locking means, and the protruding portion is movable between the first abutting portion and the second abutting portion. It has a guide part,
When the locking means is rotated while the protruding portion is in contact with the first contact portion or the second contact portion, the release body is rotated along with the rotation of the locking means. The press machine according to claim 1, which is configured to be possible.   The press machine according to claim 2, wherein the guide part is a long hole into which the protruding part is inserted. The said release part is provided with the inclined surface which slides and moves the said lock part to the outward of the said latching body, when the said release body rotates in the direction in which the said press body presses the said workpiece | work. The press according to 2 or 3.

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