JP2012110903A - Pushing-up cam device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pushing-up cam device that prevents each component member from being broken by an unintended increase in load on a workpiece or each component and also facilitates identifying a broken part and repairing the part.SOLUTION: The pushing-up cam device 1 includes: a cam driver 2 movable in a Z direction; a cam slide 3 movable in an X direction and slidably coming into contact with the cam driver 2 so as to move in an X1 direction with the movement of the cam driver 2 in a Z1 direction; a cam slide 4 movable in the Z direction and slidably coming into contact with the cam slide 3 so as to move in a Z2 direction with the movement of the cam slide 3 in the X1 direction; a support device 5 for movably supporting each of the cam driver 2, cam slides 3 and 4; and a returning mechanism 6 for returning the cam slide 3 to an initial position thereof.

Description

  The present invention relates to a cam device for processing a panel of an automobile or the like, and a push-up cam device that performs bending or the like by pushing up a cam slide provided with a processing tool from below using an inclined cam surface. About.

  For example, in Patent Documents 1 and 2, a driver unit that is moved up and down by a moving mold, a horizontal slide unit that is moved in a horizontal direction by an inclined cam surface of the driver unit, and a vertical movement caused by the horizontal movement of the horizontal slide unit. And an elastic means (return mechanism) for returning the horizontal slide unit to its original position, and these cam mechanisms in the bottomed rectangular cylindrical holder unit There has been proposed a push-up cam device that is housed in a substantially rectangular cam housing space.

JP 2008-302212 A JP 2008-307546 A

  By the way, in such a push-up cam device, a slight error in the amount of movement of each component member such as a driver unit, a horizontal slide unit, and a vertical slide unit, a change in the offset position of a processing tool attached to the push-up cam device, and a gap between the component members In addition, there is a risk of causing an unintended load increase on the workpiece and each component due to the presence of foreign matter between the mold and the workpiece and causing damage to the die itself in addition to breakage. Moreover, since the damaged part of such a push-up cam device is unspecified, it is extremely difficult to specify the damaged part, and depending on the damaged part, a great amount of labor may be required until the repair work is completed.

  The present invention has been made in view of the above-described points, and the object of the present invention is to prevent damage to the mold due to an unintended increase in load on each component member and workpiece, and further, It is an object of the present invention to provide a push-up cam device that makes it easy to identify and repair a broken portion by avoiding breakage at an unspecified portion, and to suppress the extent of damage due to an unintended situation during use as much as possible.

  The push-up cam device according to the present invention includes a cam driver that is movable in the vertical direction and a laterally movable and slidable contact with the cam driver. A lateral cam slide that moves, and a vertical cam slide that is movable in the vertical direction and is slidably in contact with the lateral cam slide, and moves upward in the lateral movement of the lateral cam slide. And a supporting means for movably supporting each of the cam driver, the lateral cam slide and the vertical cam slide, and a return mechanism for returning the lateral cam slide to the initial position. At least one of the cam slide and the vertical cam slide includes the cam driver, the lateral cam slide, and the vertical cam slide. A first moving member that is moved on the basis of the moving force transmitted in the step, and a second moving member that is disposed with a gap so as to be moved relative to the first moving member on the basis of the moving force. A connecting member that connects and integrates the first moving member and the second moving member, and the connecting member is transmitted between the first moving member and the second moving member via the connecting member. When the moving force exceeds a predetermined moving force, there is a fragile portion that is sheared to release transmission of the moving force.

  According to the push-up cam device of the present invention, in particular, at least one of the cam driver, the lateral cam slide, and the vertical cam slide is transmitted between the cam driver, the lateral cam slide, and the vertical cam slide. A first moving member that is moved based on a moving force; a second moving member that is disposed with a gap so as to be moved relative to the first moving member based on the moving force; And a connecting member that connects and integrates the member and the second moving member, and the connecting member transmits the moving force transmitted between the first moving member and the second moving member via the connecting member. Have a fragile portion that is sheared to release transmission of the moving force when a predetermined moving force is exceeded. A predetermined moving force that the connecting member transmits between the first moving member and the second moving member due to a slight error in the movement amount of the slide, a change in the offset position of the processing tool with respect to the vertical cam slide, or the presence of foreign matter, etc. When the moving force of the connecting member is exceeded, the fragile portion of the connecting member is preferentially broken by shear, and one of the first moving member and the second moving member to which the moving force is applied is the first moving member and the second moving member. The movement of the other of the moving members can be caused to move by a gap, thereby releasing the transmission of the moving force between the first moving member and the second moving member by the connecting member. Cancels the transfer of moving force between the cam slide and the vertical cam slide, and increases the unintended moving force applied to the cam driver, lateral cam slide, and vertical cam slide. In addition, it is possible to eliminate the possibility of an unintended increase in load on the support means and the return mechanism based on the increase in the moving force, to suppress the damage to the mold, and further, the cam as a component member of the cam unit The degree of damage can be suppressed as much as possible by preventing breakage at unspecified places in the driver, the lateral cam slide, the vertical cam slide, the support means and the return mechanism. When an unintended increase in the moving force applied to the cam drive occurs, the cam driver, the lateral cam slide, the vertical cam slide, the support means and the return mechanism (among the cam driver, lateral cam slide and vertical cam slide) Prior to (except for the connecting member that at least one has), the fragile portion of the connecting member breaks, so the location of the breakage is easy, Thus, it becomes easy to identify and repair the damaged portion.

  In the push-up cam device of the present invention, the cam driver may include the first moving member, the second moving member, and the connecting member. In such a case, the first moving member of the cam driver is moved in the vertical direction. It is movable and is slidably in contact with the lateral cam slide. The second moving member of the cam driver is movable in the vertical direction, and the gap in the vertical direction with respect to the first moving member of the cam driver. And a fragile portion of the connecting member of the cam driver is provided with the first moving member and the second moving member of the cam driver. When the movement force in the vertical direction transmitted between them exceeds a predetermined movement force, shearing is performed to cancel the transmission of the movement force in the vertical direction. According to such a push-up cam device, breakage due to shear can be preferentially caused in the weakened portion of the connecting member arranged in the cam driver.

  In the push-up cam device of the present invention, the vertical cam slide may include the first moving member, the second moving member, and the connecting member. In such a case, the first moving member of the vertical cam slide is provided. Is movable in the vertical direction and is slidably in contact with the lateral cam slide, and the second moving member of the vertical cam slide is movable in the vertical direction, and is the first of the vertical cam slide. The movable member has a protruding portion that is disposed with a gap in the vertical direction and protrudes upward with respect to the first moving member. When the moving force in the vertical direction transmitted between the first moving member and the second moving member of the directional cam slide exceeds a predetermined moving force, it is sheared to release the transmission of the vertical moving force. It has become. According to such a push-up cam device, breakage due to shear can be preferentially caused in the weakened portion of the connecting member arranged in the vertical cam slide.

  In the push-up cam device of the present invention, the lateral cam slide may include the first moving member, the second moving member, and the connecting member. In such a case, the first moving member of the lateral cam slide Is movable in the lateral direction and is slidably in contact with the cam driver, the second moving member of the lateral cam slide is movable in the lateral direction, and the first moving member of the lateral cam slide The fragile portion of the connecting member of the lateral cam slide is arranged to have a gap in the lateral direction and slidably contact the vertical cam slide. When the lateral movement force transmitted between the two moving members exceeds a predetermined movement force, shearing is performed to cancel the transmission of the lateral movement force. According to such a push-up cam device, breakage due to shear can be preferentially caused in the weakened portion of the connecting member disposed on the lateral cam slide.

  According to the present invention, it is possible to cause damage to a mold by preferentially causing damage at a specific portion of the cam device when an unintentional increase in load is applied to each component member or workpiece of the push-up cam device. In addition, it is possible to easily identify and repair damaged parts by preventing damage at unspecified parts of the cam device, and the degree of damage to the cam device due to unintended situations when using the cam device. It is possible to provide a push-up cam device that can suppress the labor required for repair and repair as much as possible.

It is a partially expanded perspective explanatory view of an example of an embodiment of the invention. It is a cross-sectional explanatory drawing of the example shown in FIG. It is a plane explanatory view of the example shown in FIG. It is IV-IV arrow directional cross-sectional explanatory drawing of the example shown in FIG. FIG. 3 is an enlarged perspective explanatory view of a connecting member shown in FIG. 2. It is operation | movement explanatory drawing of the example shown in FIG. It is operation | movement explanatory drawing of the example shown in FIG. It is explanatory drawing of the other up-down direction slide used instead of the up-down direction slide shown by FIG. It is explanatory drawing of the other horizontal slide used instead of the horizontal slide shown by FIG. (A), (b) and (c) is explanatory drawing of the weak part of the connection member shown by FIG.2, FIG8 and FIG.9. It is operation | movement explanatory drawing of the processing tool attached to the tool attachment part of a pushing-up cam apparatus.

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

  1 to 7, the push-up cam device 1 of this example is movable in the X direction as a lateral direction perpendicular to the Z direction, and a cam driver 2 that is movable in the Z direction as the vertical direction. A lateral cam slide 3 (hereinafter referred to as a cam slide 3) that is slidably in contact with the cam driver 2 and moves in the X1 direction when the cam driver 2 is moved in the Z1 direction; The vertical cam slide 4 (hereinafter referred to as the cam slide 4) moves in the Z2 direction as the upward direction when the cam slide 3 moves in the X1 direction. 2), a support means 5 for movably supporting the cam driver 2, the cam slides 3 and 4, and a return mechanism for returning the cam slide 3 to the initial position shown in FIG. It is provided with a door.

  The support means 5 is disposed between the bottom wall 11, the front wall 12 and the rear wall 13 attached to the bottom wall 11, and the front wall 12 and the rear wall 13 in the X direction, and is orthogonal to the X direction and the Z direction. A pair of side walls 14 and 15 attached to the bottom wall 11, the front wall 12 and the rear wall 13 are provided to face each other with the bottom wall 11 therebetween in the Y direction. The bottom wall 11, the front wall 12, the rear wall 13 and the side walls 14 and 15 are attached to each other via bolts 16. The bottom wall 11, the front wall 12, the rear wall 13, and the side walls 14 and 15 form one cam holder having a space for accommodating the cam driver 2, the cam slide 3, and the cam slide 4. The inner surface 31 of the bottom wall 11 is slidably in contact with the cam slide 3 in the X direction, and the inner surface 32 of the front wall 12 is slidably in contact with the cam slide 4 in the Z direction. The inner surface 33 is slidably in contact with the cam driver 2 in the Z direction, and the inner surfaces 34 and 35 of the side walls 14 and 15 are in contact with the cam driver 2 and the cam slide 4 in the Z direction and are in contact with the cam slide 3. It is slidable in the direction. A return mechanism 6 is attached to the bottom wall 11. Such support means 5 is formed to guide the cam driver 2 and the cam slide 4 in the Z direction and guide the cam slide 3 in the X direction, respectively.

  At least one of the cam driver 2 and the cam slides 3 and 4 includes a first moving member that is moved based on the moving force transmitted between the cam driver 2 and the cam slides 3 and 4, and the moving force. A second moving member disposed with a gap so that the first moving member can be moved relative to the first moving member, and a connecting member that connects and integrates the first moving member and the second moving member. The connecting member cancels transmission of the moving force when the moving force transmitted through the connecting member between the first moving member and the second moving member exceeds a predetermined moving force. It has a fragile part that is sheared as much as possible. In this example, the cam driver 2 will be described in detail below using reference numerals, assuming that the cam driver 2 includes the first moving member, the second moving member, and the connecting member. The cam driver 2 includes a first moving member 21 that is slidably in contact with the cam slide 3 (hereinafter referred to as a moving member 21) and a lower surface 52 with respect to the moving member 21 in the Z direction. The second moving member 24 that is movable in the Z direction (hereinafter referred to as “moving”) has a protruding portion 23 that protrudes in the Z2 direction with respect to the upper surface 48 of the moving member 21. And a connecting member 25 that connects the moving member 21 and the moving member 24 so as to transmit the moving force in the Z direction between the moving member 21 and the moving member 24.

  The moving member 21 has a main body 41 slidably contacting in the Z direction so as to be guided in the Z direction to the inner surface 33 of the rear wall 13 and the inner surfaces 34 and 35 of the side walls 14 and 15, and a line extending in the Z direction. An inclined surface 42 which is inclined and formed on the bottom of the main body 41 and is slidably in contact with the cam slide 3; a contact surface 43 which is formed on the main body 41 in contact with the moving member 24; The receiving surface 44 formed on the main body 41 so as to face the lower surface 52 of the moving member 24 with a predetermined gap on the Z1 direction side, and the contact surface so that the connecting member 25 is partially inserted. A hole 45 is formed extending in the X2 direction from 43 and penetrating through the main body 41 and opening in the contact surface 43. In this example, the hole 45 is provided, but it may be a recess. The inclined surface 42 is inclined so as to gradually approach the bottom wall 11 in the X2 direction toward the rear wall 13 side. The main body 41 is formed with a slit 56 that is concave and extends in the Z direction on a rear surface 47 that is slidably in contact with the inner surface 33 of the rear wall 13 in the Z direction. A locking member 57 having a projecting portion arranged in the slit 56 is detachably mounted on the upper surface 17 with a bolt or the like. The slit 56 is opened on the upper surface 48 of the main body 41, and is closed by the closing surface 58 in the middle of the rear surface 47 of the main body 41 from the upper surface 48 side in the Z1 direction. When the cam driver 2 moves excessively in the Z2 direction, the locking member 57 engages with the closing surface 58 of the slit 56 of the main body 41 to prevent the movement in the Z2 direction. Unintended cam driver 2 can be prevented from falling off.

  The moving member 24 is slidably in contact with the inner surfaces 34 and 35 of the side walls 14 and 15 and the sliding surface 92 of the sliding plate 85 so as to be guided in the Z direction, and the lower surface 52 is received by the moving member 21. A main body 51 disposed with a predetermined gap on the Z2 direction side with respect to the portion 44, a contact surface 53 formed on the main body 51 so as to contact the contact surface 43 of the moving member 21 via the connecting member 25, A recess 55 that extends in the X1 direction from the contact surface 53 so as to be partially inserted into the connecting member 25 and is formed inside the main body 51 and that is open at the contact surface 53 and is closed inside the main body 51; The upper surface 26 includes a protrusion 23 that is provided integrally with the main body 51 so as to protrude in the Z2 direction with respect to the upper surface 48 of the main body 41 of the moving member 21. In this example, the recess 55 is provided, but this may be a hole.

  The connecting member 25 is formed in a direction intersecting with a line extending in the Z direction, in this example, a main body 61 extending in the X direction, and the main body 61, and is transmitted in the Z direction between the moving members 21 and 24. And a fragile portion 62 that is sheared to release transmission of the movement force in the Z direction when the movement force exceeds a predetermined movement force. In this example, the main body 61 has a columnar shape as shown in FIG. 5, for example, and the fragile portion 62 is disposed at an intermediate portion of the main body 61 in the X direction. The fragile portion 62 is formed by reducing the diameter of a part of the main body 61. In such a connecting member 25, the main body 61 is inserted into the hole 45 of the moving member 21 and the recess 55 of the moving member 24, and the fragile portion 62 is disposed in the openings in the contact surfaces 43 and 53 of the hole 45 and the recess 55. As a result, the movement force in the Z direction is transmitted between the moving members 21 and 24, while the transmission of the movement force in the Z direction exceeding the predetermined movement force in the Z direction is released. The predetermined moving force is such that the fragile portion 62 of the connecting member 25 is sheared and fractured prior to the constituent members (excluding the connecting member 25) of the push-up cam device 1, and does not cause damage to the constituent members. The degree of movement is set in advance.

  When such a cam driver 2 is actuated by a hydraulic ram or the like and a moving force in the Z1 direction is applied to the upper surface 26 of the projecting portion 23 of the moving member 24 through the upper mold, And the moving force in the Z1 direction is transmitted to the main body 41 of the moving member 21 via the connecting member 25, so that the moving member 21, the moving member 24, and the connecting member 25 are connected to the rear wall 13, The side walls 14 and 15 are moved in the Z1 direction while being guided by the inner surfaces 33, 34 and 35 of the side walls 15 and the sliding surface 92 of the sliding plate 85, respectively. When the cam driver 2 moves in the Z1 direction, the inclined surface 42 of the moving member 21 slides on the inclined surface 72 of the cam slide 3 in the diagonally downward direction X2Z1, so that the cam slide 3 moves toward the front wall 12 in the X direction. A moving force in the X1 direction is generated and moved in the X1 direction as shown in FIG.

  Further, the cam driver 2 is configured such that the inclined surface 42 of the moving member 21 moves on the inclined surface 72 of the cam slide 3 obliquely downward X2Z1 based on the movement of the cam slide 3 in the X direction toward the rear wall 13 in the X direction. When sliding in the diagonally upward direction X1Z2 that is the reverse direction, a moving force in the Z2 direction is generated in the moving member 21, the moving member 24, and the connecting member 25 and moves in the Z2 direction to the initial position shown in FIG. Return.

  For example, in the movement of the cam driver 2 in the Z1 direction, when the moving force in the Z1 direction transmitted from the moving member 24 to the fragile portion 62 of the connecting member 25 to the moving member 21 exceeds a predetermined moving force, FIG. As shown in FIG. 2, the fragile portion 62 of the connecting member 25 is broken by shear, and the moving member 24 instantaneously moves in the Z1 direction by the gap 22 and the moving force in the Z1 direction from the upper die to the moving member 24 is reduced. Accordingly, the transmission of the moving force in the Z1 direction between the moving member 24 and the moving member 21 by the connecting member 25 is released, and the moving force in the X1 direction from the cam driver 2 to the cam slide 3 and the cam slide are released. The moving force in the Z2 direction from 3 to the cam slide 4 is also released. The moving member 24 can move with respect to the moving member 21 by the width in the Z direction of the gap 22, the moving member 24 moves in the Z1 direction with respect to the moving member 21 by the width, and the main body 51 of the moving member 24 moves. It is received by the receiving portion 44 of the moving member 21.

  The cam slide 3 includes a slide body 71 which is slidably in contact with the inner surface 31 of the bottom wall 11 and the inner surfaces 34 and 35 of the side walls 14 and 15 in the X direction, and is slidable in the X direction. An inclined surface 72 that is formed on the slide main body 71 and is slidably in contact with the inclined surface 42 of the cam driver 2, and is arranged on the front wall 12 side with respect to the inclined surface 72. In addition, an inclined surface 73 that is inclined in a direction opposite to the inclined surface 72 with respect to a line extending in the X direction and that is slidably in contact with the cam slide 4 is formed, and the inclined surface 73 is formed. An engaging body 74 is provided on the slide body 71 so as to be slidably engaged with the cam slide 4 along the inclined surface 73.

  The inclined surface 72 is inclined so as to gradually approach the bottom wall 11 in the X2 direction, and the inclined surface 73 is inclined so as to gradually approach the bottom wall 11 in the X1 direction.

  For example, as shown in FIG. 4, the engagement body 74 has a substantially T-shaped cross section and has a pair of engagement protrusions 75 and 76 protruding in the Y direction. The engaging body 74 is formed with the inclined surface 73, and the inclined surface 73 is slidably in contact with the cam slide 4.

  When the inclined surface 72 is slid with respect to the inclined surface 42 of the cam driver 2 based on the movement of the cam driver 2 in the Z1 direction, the cam slide 3 generates a moving force in the X1 direction. It moves in the X1 direction while being guided by the inner surface 31 and the inner surfaces 34 and 35 of the side walls 14 and 15, and the movement in the X1 direction causes the inclined surface 73 to slide with respect to the cam slide 4 so that the cam slide 4 moves in the Z2 direction. A moving force is applied, and the cam slide 4 is moved in the Z2 direction.

  The cam slide 4 is guided in the Z direction so as to be guided in the Z direction to the front surface 27 of the moving member 24 of the cam driver 2 through the inner surface 32 of the front wall 12, the inner surfaces 34 and 35 of the side walls 14 and 15, and the sliding plate 85. A slide body 81 that is slidably in contact with the slide body 81, an inclined surface 82 that is inclined with respect to a line extending in the Z direction and that is slidably in contact with the inclined surface 73 of the cam slide 3, and the inclined surface 82 And an engaged body 83 disposed on the slide main body 81 so as to be slidably engaged with the inclined surface 73 of the cam slide 3 and protruding from the support means 5 in the Z2 direction in FIG. And a tool mounting portion 84 disposed on the upper surface 93 of the slide main body 81. The inclined surface 82 is inclined so as to gradually approach the bottom wall 11 in the X1 direction. The slide body 81 is concave with respect to the inner surfaces 34 and 35 of the side walls 14 and 15, respectively, extends in the Z direction, and has upper surfaces 94 and 95 in the Z2 direction, and lower surfaces 96 and 97 in the Z1 direction. A pair of recesses 86 and 87 that are respectively closed are formed, and a locking member 88 having a protruding portion disposed in the recess 86 is detachably attached to the upper surface 18 of the side wall 14 with a bolt or the like. On the upper surface 19 of the side wall 15, a locking member 89 having a projecting portion disposed in the recess 87 is detachably attached by a bolt or the like. The locking members 88 and 89 engage with the upper surfaces 94 and 95 of the pair of recesses 86 and 87 of the slide body 81 when the cam slide 4 moves excessively in the Z direction, and move in the Z direction. This prevents the cam slide 4 from dropping out unintentionally.

  The slide body 81 of the cam slide 4 is adjacent to the moving member 24 of the cam driver 2, and a sliding plate 85 is disposed in the gap in the X direction between the slide body 81 and the moving member 24. The cam slide 4 is slidable in the Z direction with respect to the cam driver 2. The sliding plate 85 is attached to the slide body 81 with bolts or the like.

  For example, as shown in FIG. 4, the engaged body 83 includes a pair of L-shaped members 90 and 91 having a substantially L-shaped cross section, and the L-shaped members 90 and 91 are engaged protrusions 75 of the engaging body 74. And 76, respectively. The engaged body 83 is formed with the inclined surface 82, and the inclined surface 82 is slidably in contact with the inclined surface 73 of the cam slide 3. When the engaged body 83 is engaged with the engaging body 74, the cam slide 4 can move relative to the inclined surface 73 of the cam slide 3, but the cam slide 4 and the cam slide 3 are in contact with each other. Is maintained.

  When the inclined surface 82 is slid with respect to the inclined surface 73 of the cam slide 3 based on the movement of the cam slide 3 in the X1 direction, the cam slide 4 generates a moving force in the Z2 direction. It moves in the Z2 direction while being guided to the front surface 27 of the moving member 24 of the cam slide 2 via the inner surface 32, the inner surfaces 34 and 35 of the side walls 14 and 15, and the sliding plate 85, and thus the tool mounting portion 84 is moved to Z2. It is designed to move in the direction. A processing tool such as a bending blade attached to the tool mounting portion 84 can perform a process such as a bending process on the workpiece based on the movement of the cam slide 4 in the Z2 direction.

  The return mechanism 6 includes a rod 65 extending in the X direction with one end 64 fixed to the front wall 12 side of the bottom wall 11, a coil spring 66 surrounding the rod 65 and concentrically with the rod 65, and a rod A spring receiver 68 fixed to one end portion 64 of the 65 and receiving an elastic extension force from the one end portion 67 side of the coil spring 66, and an initial compression force is applied to the coil spring 66 in cooperation with the spring receiver 68. A transmission member 70 for transmitting the elastic extension force received from the other end 69 side of the coil spring 66 to the cam slide 3 is provided. The transmission member 70 is movable in the X direction with respect to the rod 65 and is fixed to the slide body 71 of the cam slide 3 with a bolt or the like.

  When the cam slide 3 is moved in the X1 direction based on the movement of the cam driver 2 in the Z1 direction, the return member 6 is also moved in the X1 direction as shown in FIG. The spring 66 is compressed and its elastic extension force gradually increases. When the application of the moving force in the Z1 direction to the moving member 24 of the cam driver 2 from the upper die or the like is completed, the coil spring 66 extends to move the cam slide 3 in the X2 direction to the initial position shown in FIG. Return. When the cam slide 3 moves in the X2 direction, the cam driver 2 is moved in the Z2 direction, while the cam slide 4 is engaged with the cam slide 3 via the engaging body 74 and the engaged body 83. Therefore, it is pulled in the Z1 direction and moved in the Z1 direction, so that the processing tool attached to the tool attachment portion 84 of the cam slide 4 can be reliably separated from the workpiece.

  In such a push-up cam device 1, when a moving force in the Z1 direction is applied to the moving member 24 of the cam driver 2 by the upper mold as described above, the moving member 21 of the cam driver 2 moves along with the moving member 24 in the Z1 direction. The slide 3 is moved in the X1 direction and the cam slide 4 is moved in the Z2 direction, and thus the workpiece such as a bending blade attached to the tool mounting portion 84 of the cam slide 4 is raised to process the workpiece. . When the application of the moving force in the Z1 direction from the upper die to the moving member 24 of the cam driver 2 is completed as described above, the cam slide 3 is moved in the X2 direction by the elastic return force of the return mechanism 6, and this Due to the movement, the moving member 21 and the moving member 24 of the cam driver 2 are moved in the Z2 direction, and the cam slide 4 is moved in the Z1 direction. The slide 3 and the cam slide 4 are returned to the initial positions, respectively, and the processing tool attached to the tool mounting portion 84 of the cam slide 4 is lowered and separated from the workpiece.

  However, the movement of the moving member 21 of the cam driver 2 due to a slight error in the moving amount of the cam driver 2, the cam slide 3 and the cam slide 4, the change of the offset position of the processing tool with respect to the tool mounting portion 84, or the presence of foreign matter, etc. The connection surface 43 and the contact surface 53 of the moving member 24 of the cam driver 2 extend in the X1 direction inside the main body 51 of the moving member 24 and the X2 direction inside the main body 41 of the moving member 21 centering on the contact portion interface. When the moving force applied to the member 25 exceeds a predetermined moving force in the Z direction between the moving member 21 and the moving member 24 of the cam driver 2, the connecting member 25 is weak as shown in FIG. One of the moving member 21 and the moving member 24 to which the portion 62 is preferentially broken by shear and is given a moving force in the Z direction is the moving member 21 and the moving member 2. Accordingly, the movement of the Z-direction moving force between the upper mold and the moving member 24 is released, and thereby the moving member 24 and the movement of the cam driver 2 by the connecting member 25 are released. The transmission of the movement force in the Z direction between the members 21 is released, so that the transmission of the movement force in the Z direction between the cam driver 2, the cam slide 3 and the cam slide 4 is released, and the cam driver 2 and the cam slide 3 are released. In addition, it is possible to eliminate the possibility that an unintended increase in moving force applied to the cam slide 4 and an increase in unintentional load on the support means 5 and the return mechanism 6 based on the increase in the moving force can occur, and damage to the mold can occur. Since the fragile portion 62 of the connecting member 25 disposed in the cam driver 2 that is a specific location is preferentially broken, the cam driver that is a constituent member of the push-up cam device 1 , The cam slide 3, the cam slide 4, it is possible to suppress the degree of damage as much as possible by preventing the damage of an unspecified locations in the support means 5 and the return mechanism 6. Further, when an unintentional increase in the moving force applied to the push-up cam device 1 occurs as described above, the cam driver 2 (excluding the connecting member 25), the cam slide 3, the cam slide 4, the support means 5, and the return. Prior to the mechanism 6, the fragile portion 62 of the connecting member 25 is preferentially broken, so that it is easy to identify the damaged part, and thus it is easy to identify and repair the damaged part.

  FIG. 11 is an explanatory diagram related to bending of the workpiece 121 by the bending blade 120 as a processing tool that is raised and lowered by the push-up cam device 1 of this example. The bending blade 120 attached to the tool attachment portion 84 of the cam slide 4 contacts the workpiece 121 when the cam slide 4 is lifted, and performs bending on the workpiece 121 in cooperation with the upper mold 122. After the bending process is completed, the bending blade 120 is separated from the workpiece 121 by the lowering of the cam slide 4. Reference numeral 123 denotes a lower mold, which sandwiches the workpiece 121 together with the upper mold.

  According to the push-up cam device 1 of this example, the cam driver 2 that is movable in the Z direction and the cam driver 2 that is movable in the X direction and slidably contact the Z1 direction of the cam driver 2. The cam slide 3 that moves in the X1 direction during the movement of the cam, and the cam that is movable in the Z direction and slidably contacts the cam slide 3, and moves in the Z2 direction when the cam slide 3 moves in the X1 direction The cam driver 2 is provided with a slide 4, a cam driver 2, a support means 5 for movably supporting the cam slide 3 and the cam slide 4, and a return mechanism 6 for returning the cam slide 3 to the initial position. The cam driver 2 as at least one of the cam slides 3 and 4 is placed between the cam driver 2 and the cam slide 3 and the cam slide 4. A moving member 21 that is moved based on the transmitted moving force, a moving member 24 that is disposed with a gap 22 so as to be moved relative to the moving member 21 based on the moving force, and a moving member And a connecting member 25 which connects and integrates 21 and 24, and the connecting member 25 has a predetermined movement of the moving force transmitted between the moving members 21 and 24 via the connecting member 25. The fragile portion 62 is sheared to release the transmission of the moving force when the force is exceeded. Specifically, the cam driver 2 is slidably in contact with the cam slide 3 in the Z direction. The movable member 21 is freely movable, and the receiving portion 44 formed on the main body 41 of the movable member 21 is arranged on the lower surface 52 formed on the main body 51 so as to face each other with a gap 22 in the Z direction. Transfer A movable member 24 having a projecting portion 23 projecting in the Z2 direction with respect to the upper surface 48 of the main body 41 of the member 21 and a movable force in the Z direction are transmitted between the movable members 21 and 24. The connecting member 25 is connected to the moving member 21 and the moving member 24, and the connecting member 25 has a predetermined moving force in the Z direction transmitted between the moving members 21 and 24. Since the fragile portion 62 is sheared to release the transmission of the moving force in the Z direction when the force is exceeded, the amount of movement of the cam driver 2, the cam slide 3, and the cam slide 4 that are moved respectively. Is set in advance so that the moving force applied to the connecting member 25 due to a slight error in the angle, a change in the offset position of the processing tool with respect to the cam slide 4, the presence of foreign matter, etc. is transmitted between the moving members 21 and 24 of the cam driver 2. When the predetermined moving force in the Z direction is exceeded, the fragile portion 62 of the connecting member 25 is preferentially broken by shear, and one of the moving member 21 and the moving member 24 to which the moving force in the Z direction is given. Can move with respect to the other of the moving member 21 and the moving member 24, and the transmission of the moving force in the Z direction between the upper mold and the moving member 24 is released. The transmission of the moving force in the Z direction between the moving member 24 and the moving member 21 of the cam driver 2 is canceled, so that the moving force in the X direction between the cam driver 2 and the cam slide 3 and between the cam slide 3 and the cam slide 4 are cancelled. The transmission of the moving force in the Z direction is released, and the support means 5 and the return mechanism 6 are based on the unintended increase in the moving force applied to the cam driver 2 and the cam slides 3 and 4 and the increase in the moving force. The possibility of unintentional increase in load can be eliminated, and damage to the mold and the cam driver 2, cam slides 3 and 4, the support means 5 and the return mechanism 6 which are constituent members of the push-up cam device 1 can be prevented. it can. When an unintentional increase in the moving force applied to the push-up cam device 1 occurs as described above, the cam driver 2 (excluding the connecting member 25), the cam slides 3 and 4, the support means 5, and the return mechanism 6 Prior to this, since the connecting member 25 is broken, it is easy to identify and repair the damaged portion.

  Although the push-up cam device 1 includes the vertical cam slide having the structure of the cam slide 4 in the above description, instead of this, for example, as shown in FIG. 8, the cam driver 2, the cam slide 3, and the cam described later A moving member 101 that is moved based on a moving force transmitted between the slides 107, and a moving member 104 that is disposed with a gap 102 so as to be moved relative to the moving member 101 based on the moving force. And a connecting member 105 that connects and integrates the moving members 101 and 104, and the connecting member 105 transmits the moving force transmitted between the moving members 101 and 104 via the connecting member 105. A cam slur that is movable in the Z direction and has a fragile portion 106 that is sheared to release transmission of the movement force when the movement force exceeds a predetermined movement force. In detail, a moving member 101 that is slidably in contact with the cam slide 3 and movable in the Z direction, and a gap 102 in the Z direction with respect to the moving member 101 are arranged. The movable member 104 having a protrusion 103 protruding in the Z2 direction with respect to the movable member 101 and the movable member 104 movable in the Z direction and the moving force in the Z direction are transmitted between the movable members 101 and 104. As described above, the moving member 101 and the connecting member 105 that connects the moving member 104 are provided, and the connecting member 105 has a moving force in the Z direction transmitted between the moving members 101 and 104 as a predetermined moving force. A cam slide 107 that is movable in the Z direction may be provided having a fragile portion 106 that is sheared so as to release the transmission of the movement force in the Z direction when exceeding the above.

  Although the push-up cam device 1 includes the lateral cam slide having the structure of the cam slide 3 as described above, instead of this, for example, as shown in FIG. 9, a cam driver 2, a cam slide 117 and a cam described later are provided. A moving member 111 that is moved based on the moving force transmitted between the slides 4 or 107, and a movement that is arranged with a gap 112 so that it can be moved relative to the moving member 111 based on the moving force. Member 114 and connecting member 115 that connects and integrates moving members 111 and 114, and connecting member 115 is transmitted between moving members 111 and 114 via connecting member 115. When the moving force exceeds a predetermined moving force, the moving force in the X direction has a fragile portion 116 that is sheared to release the transmission of the moving force. A cam slide 117 may be provided. Specifically, the moving member 111 is slidably in contact with the cam driver 2 and is movable in the X direction, and a gap 112 in the X direction with respect to the moving member 111. And a movable member 114 slidably contacting the cam slide 4 and movable in the X direction, and the movable member 111 so as to transmit the X direction moving force between the movable members 111 and 114. And a connecting member 115 that connects the moving member 114, and the connecting member 115 is used when the moving force in the X direction transmitted between the moving member 111 and the moving member 114 exceeds a predetermined moving force. In addition, a cam slide 117 movable in the X direction may be provided having a fragile portion 116 that is sheared to release the transmission of the movement force in the X direction.

  When the push-up cam device 1 includes at least one of the cam slides 107 and 117 shown in FIGS. 8 and 9, the push-up cam device 1 is replaced with, for example, the connecting member 25 instead of the cam driver 2. A cam driver (not shown) in which the configuration is omitted and the moving members 21 and 24 are integrally formed with each other may be provided. In such a case, the cam slide 107 is connected to the cam driver 2. Similarly, the fragile portion 106 can be broken by shear, and the cam slide 117 can cause the fragile portion 116 to be broken by shear similarly to the cam driver 2, so that the same effect as described above can be obtained.

  The push-up cam device 1 of this example includes the cam driver 2 to which the connecting member 25 is attached. However, the cam driver 2 to which the connecting member 25 is attached and the cam slide 107 to which the connecting member 105 is attached. Further, the push-up cam device having at least one of the cam slides 117 to which the connecting member 115 is mounted may be used, and the push-up cam device 1 can provide the same effects as described above.

  The connecting members 25, 105 and 115 are made of an iron-based material such as carbon steel for machine structure, alloy steel for machine structure, stainless steel, or a copper alloy-based material such as high-strength brass (CAC304 or the like) or aluminum bronze (CAC703 or the like). It may be. Examples of carbon steel for machine structure include S45C, and alloy steel for machine structure includes chromium molybdenum steel (SCM), nickel chrome steel (SNC), nickel chrome molybdenum steel (SNCM), etc. , Austenitic stainless steel (SUS304 etc.), martensitic stainless steel (SUS420J1 etc.) and the like. The side cross-sectional shape of each of the weakened portions 62, 106, and 116 of the connecting members 25, 105, and 115 may be U-shaped as shown in FIG. 10 (a), for example, as shown in FIG. 10 (b). A U-shape may be used as shown, or a V-shape may be used as shown in FIG.

DESCRIPTION OF SYMBOLS 1 Push-up cam apparatus 2 Cam driver 3, 4, 107, 117 Cam slide 5 Support means 6 Returning mechanism

Claims (4)

  A cam driver that is movable in the vertical direction, a lateral cam slide that is movable in the lateral direction and is slidably in contact with the cam driver, and moves in the lateral direction in the downward movement of the cam driver; A vertical cam slide that is movable in the vertical direction and is slidably in contact with the horizontal cam slide and moves upward in the horizontal movement of the horizontal cam slide, a cam driver, and a horizontal cam A support means for movably supporting each of the slide and the vertical cam slide, and a return mechanism for returning the horizontal cam slide to the initial position, the cam driver, the horizontal cam slide and the vertical cam slide; At least one of them has a moving force transmitted between the cam driver, the lateral cam slide and the vertical cam slide. A first moving member moved in accordance with the moving force, a second moving member disposed with a gap so as to be moved relative to the first moving member based on the moving force, a first moving member, and a first moving member A connecting member that connects and integrates the two moving members, and the connecting member has a predetermined movement force transmitted through the connecting member between the first moving member and the second moving member. A push-up cam device having a fragile portion that is sheared to release transmission of the moving force when the moving force is exceeded.   The cam driver includes the first moving member, the second moving member, and the connecting member, and the first moving member of the cam driver is movable in the vertical direction and slidably contacts the lateral cam slide. The second moving member of the cam driver is movable in the vertical direction, is disposed with a gap in the vertical direction with respect to the first moving member of the cam driver, and is higher than the first moving member. The fragile portion of the connecting member of the cam driver has a vertical moving force transmitted between the first moving member and the second moving member of the cam driver and a predetermined moving force. The push-up cam device according to claim 1, wherein the thrust cam device is sheared so as to cancel transmission of the movement force in the up-down direction when exceeding.   The vertical cam slide includes the first moving member, the second moving member, and the connecting member, and the first moving member of the vertical cam slide is movable in the vertical direction and slides on the horizontal cam slide. The second moving member of the vertical cam slide is movable and is movable in the vertical direction, and is arranged with a gap in the vertical direction with respect to the first moving member of the vertical cam slide. It has a protruding portion that protrudes upward with respect to the first moving member, and the fragile portion of the connecting member of the vertical cam slide is transmitted between the first moving member and the second moving member of the vertical cam slide. 2. The push-up cam device according to claim 1, wherein when the moving force in the up and down direction exceeds a predetermined moving force, the push cam device is sheared to release the transmission of the moving force in the up and down direction.   The lateral cam slide includes the first moving member, the second moving member, and the connecting member, and the first moving member of the lateral cam slide is movable in the lateral direction and slidable by the cam driver. The second moving member of the lateral cam slide is movable in the lateral direction and is disposed with a gap in the lateral direction with respect to the first moving member of the lateral cam slide, and the vertical cam The fragile portion of the connecting member of the lateral cam slide is slidably in contact with the slide, and the lateral moving force transmitted between the first moving member and the second moving member of the lateral cam slide is a predetermined movement. 2. The push-up cam device according to claim 1, wherein the thrust cam device is sheared so as to cancel transmission of the lateral movement force when the force is exceeded.

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