JP4396171B2 - Linear rail unlocking device and unlocking method - Google Patents

Description

  The present invention relates to a linear rail lock releasing device and a lock releasing method for releasing a lock fixed state of a movable body movable along a linear rail.

  2. Description of the Related Art Conventionally, there is a moving body that moves, for example, a jig that holds and conveys a workpiece along a linear rail in an automobile production line. For example, a work such as a welding operation is performed on the workpiece in a state where a movable body including a jig moving on the linear rail is locked and fixed at a predetermined position.

Here, when the movable body is locked and fixed at a predetermined position on the linear rail, a locking device is required. Conventionally, unlocking in the locking device is described in, for example, Patent Document 1 below. In addition, the compressed air is used.
JP 2003-148463 A

  However, when unlocking is performed using compressed air, piping and solenoid valves for sending air are required, which complicates the structure and increases costs.

  In view of the above, an object of the present invention is to make it possible to release a locked state of a moving body fixed to a linear rail without using compressed air.

In order to achieve the above object, according to the present invention, a taper surface is provided on a surface of a movable body movable along a linear rail so as to face the surface of the linear rail, and the surface between the linear rail surface and the taper surface is provided. By being pressed along the tapered surface to the side where the distance between the tapered surface and the surface of the linear rail is narrowed by the elastic means, the movable member is pressed against the surface of the linear rail and moved. A pressing member that locks and fixes the body to the linear rail is provided, and an outer peripheral portion contacts and presses against the pressing member in the locked state, thereby pressing the pressing member against the elastic means. the moved, the cam member for releasing the lock fixed state provided, between the surface and the pressing member of the linear rail, accessible away movement relative to the surface of said linear rails A lock plate is provided, the pressing members are arranged on both sides of the cam member as a center, and the taper surface and the lock plate are provided corresponding to the pressing members, respectively, and the locking plates corresponding to the pressing members are provided. A lock plate support means is provided that integrates each other and lifts the lock plate from the surface of the linear rail when unlocked. The lock plate support means is a pair of support springs that elastically support from both sides of the integrated lock plate. The support springs are configured such that the sides facing each other are located farther from the linear rail than the opposite sides .

According to the present invention, since the pressing member is moved against the elastic means by rotating the cam member, the pressing state of the pressing member against the linear rail is released and the lock fixing state is released. The lock fixed state can be released without the need for piping or a solenoid valve for sending the battery, and the cost can be reduced by avoiding complication of the structure.
In addition, since the lock plate is floated from the surface of the linear rail in the unlocked state, the sliding resistance when moving the moving body can be reduced, and the durability can be improved.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a front cross-sectional view of the linear rail unlocking device according to the embodiment of the present invention, taken along line CC in FIG. 2, and FIG. 2 is a cross-sectional view of the linear rail unlocking device shown in FIG. FIG. 3 is a cross-sectional plan view taken along line A, and FIG. 3 is a side cross-sectional view taken along line BB of the linear rail unlocking device shown in FIG. 1. These figures show the unlocked state. FIG. 4 is a front cross-sectional view corresponding to FIG. 1 in a locked state.

  As shown in FIG. 1, a movable body 3 is provided so as to be movable with respect to a linear rail 1 extending in the left-right direction in FIG. As shown in FIG. 3, a guide recess 3a is provided at the lower portion of the moving body 3, and the linear rail 1 is fitted into the guide recess 3a so that the moving body 3 moves.

  In the moving body 3, the first housing 5 and the second housing 7 are joined and integrated with each other, and a space 9 in the first housing 5 opens toward the linear rail 1, and the second It is open toward the housing 7.

  The second housing 7 covers the opening of the space 9 on the second housing 7 side. On the other hand, in the vicinity of the opening on the linear rail 1 side, a lock plate 11 that is pressed against the surface of the linear rail 1 to lock the movable body 3 to the linear rail 1 is disposed.

  As shown in FIG. 1, the lock plate 11 is separated from the inner walls 9a and 9b on both sides of the moving body 3 in the space 9, and is interposed between the inner walls 9a and 9b. It is elastically supported by support springs 13 and 15 as lock plate support means.

  In the unlocked state shown in FIG. 1, each of the support springs 13 and 15 described above has the inner wall 9a, the opposite side of each of the support springs 13 and 15 as shown in FIG. Compared with the 9b side, it is in a position away from the linear rail 1. That is, while providing the inclined recessed part 11a in the surface facing the inner walls 9a and 9b of the lock plate 1, and providing the inclined recessed part 17a on the spring holder 17 provided on the inner walls 9a and 9b, the recessed parts 11a and 17a Both end portions of the support springs 13 and 15 are inserted.

  Therefore, in the unlocked state of FIG. 1, as shown in FIG. 5, the lock plate 11 is moved by the action of the support springs 13 and 15 that are inclined with respect to the surface of the linear rail 1. It will be in a state of floating from the surface.

  In the space 9 of the first housing 5, a guide member 19 arranged so as to divide the space 9 in the vertical direction in FIG. 1 is fixed by connecting the inner walls 9a and 9b to each other. . Tapered surfaces 19a and 19b are respectively provided on the surfaces of the guide member 19 facing the lock plate 11 in the vicinity of both inner walls 9a and 9b.

  Each of the tapered surfaces 19a and 19b is an inclined surface in which the distance from the lock plate 11 becomes narrower toward the side closer to each other, and between the tapered surfaces 19a and 19b and the lock plate 11 as a pressing member. The round bars 21 and 23, which are cylindrical members, are arranged so as to extend in a direction perpendicular to the paper surface in FIG. The round bars 21 and 23 are pressed in directions approaching each other by the pressing springs 25 and 27 as elastic means set on the inner walls 9a and 9b described above, and are movable in directions approaching and separating from each other. is there.

  Each of the above-described pressing springs 25 and 27 has one end side accommodated in the spring accommodating holes 9a1 and 9b1 provided in the inner walls 9a and 9b, and the other end side protruded from the spring accommodating holes 9a1 and 9b1 and round bars 21 and 23. Is in contact with A pair of cam members 29 and 31 are disposed between the pair of round bars 21 and 23. As shown in FIG. 3, the cam members 29 and 31 are located outside the both ends of the guide member 19 and serve to move the round bars 21 and 23 against the pressing springs 25 and 27.

  As shown in FIG. 1, the cam members 29 and 31 described above are provided with convex portions 29a and 31a, respectively, that hold the unlocked state by contacting the round bars 21 and 23 on both sides thereof in the unlocked state. . By this contact, the round bars 21 and 23 are moved away from each other, and the pressing operation of the lock plate 11 against the linear rail 1 is released.

  As shown in FIG. 3, the cam members 29 and 31 are fixed to a rotation center shaft 33 that is rotatably provided with respect to the support hole 5 a of the first housing 5, and the axial direction of the rotation center shaft 33 is One end of the operating arm 35 is connected and fixed to the central portion. Although not shown, the rotation center shaft 33 can be rotated from the outside.

  On the other hand, in the second housing 7, as shown in FIG. 2, cylinder portions 37 and 39 are formed adjacent to each other, and a pair of pistons 41 and 43 are placed in the cylinder portions 37 and 39, and the moving body 3. It is accommodated in such a manner that it can move in the same direction as the moving direction.

  The pistons 41 and 43 are respectively connected to the first housing 5 by springs 45 and 47 interposed between flanges 41 a and 43 a formed at the end opposite to the first housing 5 and the first housing 5. 1 is pressed away from the housing 5. Note that spring retainers 49 and 51 are provided on the first housing 5 side of the springs 45 and 47, respectively.

  The pistons 41 and 43 include rod portions 41b and 43b that protrude integrally toward the first housing 5 side. The ends of the rod portions 41b and 43b are connected and fixed to movable blocks 53 and 55 arranged in the upper portion in FIG. 1 from the guide member 19 in the space 9 in the first housing 5, respectively.

  The movable blocks 53 and 55 are guided in the space 9 between the guide member 19 and the inner wall of the first housing 5 and can move in the same direction as the moving body 5. The movable blocks 53 and 55 are connected and fixed by pins 57 extending in a direction orthogonal to the paper surface in FIG.

  The pin 57 is movably inserted into and connected to the notch 35a formed at the other end of the operating arm 35 described above. That is, due to the movement of the pistons 41 and 43 described above, the operating arm 35 rotates around the rotation center shaft 33 to rotate the cam members 29 and 31. As shown in FIG. 2, the operating arm 35 protrudes to the position of the pin 57 through the opening 19 a formed in the guide member 19.

  Each of the pistons 41 and 43 described above is always urged away from the first housing 5 by the springs 45 and 47. Therefore, as shown in FIG. Located away from the housing 5.

  At this time, the movable blocks 53 and 55 connected to the rod portions 41b and 43b of the pistons 41 and 43 are also moved to the second housing 7 side. Accordingly, the operating arm 35 is also unlocked in FIG. It is rotationally displaced from the state to the second housing 7 side. For this reason, in the lock fixed state, the cam members 29 and 31 that rotate together with the operating arm 35 are also rotationally displaced clockwise from the unlocked state of FIG. 1 to the state of FIG.

  That is, in the lock fixing state of FIG. 4, the convex portions 29 a and 31 a of the cam members 29 and 31 are separated from the round bars 21 and 23. For this reason, the round bars 21 and 23 are moved along the tapered surfaces 19a and 19b from the state of FIG. 1 toward the narrower distance between the tapered surfaces 19a and 19b and the lock plate 11 by the pressing springs 25 and 27. When pressed, they move in directions approaching each other.

  By this movement, the round bars 21 and 23 are sandwiched between the tapered surfaces 19a and 19b and the lock plate 11, and the lock plate 11 is pressed toward the surface of the linear rail 1, and as a result, The moving body 3 is locked and fixed to the linear rail 1.

  When releasing the lock fixing state shown in FIG. 4, the rotation center shaft 33 connecting and fixing the cam members 29 and 31 is rotated counterclockwise in FIG. 4 from the outside of the moving body 3. The state shown in FIG. At this time, the cam members 29 and 31 are pressed against the round springs 21 and 23 by pressing the round curved surfaces 21 and 23 against the round bars 21 and 23 by the convex curved surface portions 29b and 31b slidably contacting the round bars 21 and 23. Accordingly, the projections 29a and 31a are in contact with the round bars 21 and 23 as shown in FIG.

  In the state shown in FIG. 1, the lock plate 11 is released from being pressed by the round bars 21 and 23, and is lifted from the surface of the linear rail 1 by the support springs 13 and 15 disposed obliquely as shown in detail in FIG. To unlock.

  In this unlocked state, the operation arm 35 is also rotated from the position of FIG. 4 to the position of FIG. 1 by the rotation of the rotation center shaft 33, and accordingly, the pistons 41 and 43 are also moved to the first housing 5 side. , 47 are compressed.

  Therefore, in this unlocked state, the moving body 3 is moved along the linear rail 1 and then stopped at an appropriate position. At this stop position, the rotational operation force is applied in the counterclockwise direction to the rotation center shaft 33. Is released, the pistons 41 and 43 move away from the first housing 5 by the elastic force of the springs 45 and 47 in the compressed state, and the state shown in FIG. 4 is obtained.

  Accordingly, the operating arm 35 also rotates from the state shown in FIG. 1 to the state shown in FIG. 4, so that the cam members 29 and 31 connected to the operating arm 35 via the rotation support shaft 33 are also in the state shown in FIG. Rotate like so. Since the round bars 21 and 23 in the state of FIG. 4 are released from the pressing operation by the cam members 29 and 31, they are pressed by the pressing springs 25 and 27 to press the lock plate 11 against the linear rail 1 and are locked. It becomes.

  According to the above-described embodiment, the push operation of the lock plate 11 against the linear rail 1 is released by moving the round bars 21 and 23 against the pressing springs 25 and 27 by the rotation of the cam members 29 and 31. Since the lock fixed state is released, the lock fixed state can be released without the need for piping or a solenoid valve for sending compressed air, thereby reducing the cost by avoiding the complexity of the structure. be able to.

In addition, since the lock plate 11 is floated from the surface of the linear rail 1 in the unlocked state shown in FIGS. 1 and 5, the sliding resistance when moving the moving body 3 can be reduced, and the durability Can be improved.

  FIG. 6 is a front view showing a configuration in which the moving body 3 is moved along the linear rail 1 by the external drive mechanism 59 when the lock is released. 7 is a right side view of FIG. 6, and FIG. 8 is a plan view of FIG.

  The movable body 3 here is integrally provided with a movable connecting portion 61 that is connected to the external drive mechanism 59. The movable connecting portion 61 is movable along the linear rail 1 like the moving body 3. The movable body 59 and the movable connecting portion 61 are provided with flanges 63 and 65 projecting in opposite directions, and a connecting pin 67 is inserted into the through holes 63a and 65a formed in the flanges 63 and 65, respectively. Integrate each other.

  As shown in FIG. 8, the movable connecting portion 61 is provided with a connecting projection 69 that protrudes toward the external drive mechanism 59. On the other hand, a connecting recess 71a serving as a connecting portion is provided at the tip of the rotating arm 71 of the external drive mechanism 59, and the connecting recess 71a and the connecting projection 69 of the movable connecting portion 61 are engaged with each other, The drive mechanism 59 and the movable connecting portion 61, that is, the moving body 3 are connected to each other.

  The external drive mechanism 59 is a drive cylinder 73 as a drive means that swings between a connection position where the rotation arm 71 is connected to the connection protrusion 69 and a non-connection position where the connection is released, in addition to the rotation arm 71 described above. And a moving body drive unit 75 that moves the drive cylinder 73 in the moving direction of the moving body 3.

  As shown in FIG. 7, the moving body drive unit 75 of the external drive mechanism 59 is disposed laterally and at a lower position with respect to the linear rail 1.

  The moving body drive unit 75 has a housing base 77, and includes a ball screw in which a screw rod 81 is rotatably supported on a support plate 79 erected in the vicinity of both left and right ends in FIG. 6 of the housing base 77. A ball guide nut 83 is screwed onto the screw rod 81. As shown in FIG. 8, a motor 85 is arranged on the side of the housing base 77 opposite to the linear rail 1, and a pulley 87 connected to the motor 85 and an end of the screw rod 81 are connected. The pulley 89 is connected by a belt 91.

  As shown in FIG. 6, a support bracket 93 is attached to the upper portion of the ball guide nut 83. As shown in FIG. 7, the support bracket 93 protrudes obliquely upward toward the linear rail 1, and the mounting tool 95 provided on the proximal end side of the above-described rotating arm 71 is formed on the protruding distal end side of the support bracket 93. One end side (lower end side) is rotatably attached via a support shaft 97.

  On the other hand, the drive cylinder 73 described above is rotatably attached via a support shaft 99 to an attachment portion 93 a formed on a side portion opposite to the linear rail 1 on the base end side of the support bracket 93. The tip of the piston rod 101 extending above the drive cylinder 73 is rotatably connected via the support shaft 103 to the other end of the above-described fixture 95 protruding in the right direction in FIG.

  A pressing plate 105 as a lock releasing pressing member is fixed to the lower surface of the side portion at the tip of the rotating arm 71 in the external drive mechanism 59. As shown in FIG. 8, the pressing plate 105 is positioned in the vicinity of the moving body 3 with the pressing portion 105 a on the tip side connecting the connecting recess 71 a at the tip of the rotating arm 71 to the connecting protrusion 69.

  On the other hand, an unlocking arm 107 is connected to the rotation center shaft 33 of the moving body 3. As shown in FIG. 8, the unlocking arm 107 is bent 90 degrees from the distal end of the base 107a coaxially protruding from the rotation support shaft 33 toward the movable connecting portion 61 in the unlocked state shown in FIG. Thus, a tip portion 107 b that protrudes in parallel with the linear rail 1 is provided.

  In the locked state shown in FIG. 4, the tip 107b rises about 60 degrees with respect to the state parallel to the linear rail 1 as shown by a two-dot chain line in FIG. In this state, when connecting the connecting recess 71a of the rotating arm 71 to the connecting projection 69, the pressing portion 105a of the pressing plate 105 contacts and pushes down the tip portion 107a in the raised state, and the tip portion 107a is pushed down to the linear rail. 1 is a position parallel to 1, that is, the unlocked state.

  In the state where the drive cylinder 73 of the external drive mechanism 59 described above is driven from the retracted position shown by the two-dot chain line in FIG. 7 to the advanced position shown by the solid line and the rotating arm 71 is connected to the movable connecting portion 61, 105 pushes down the unlocking arm 107 in the state shown by the two-dot chain line in FIG. 6 to rotate the rotation center shaft 33 connected to the unlocking arm 107 to be in the unlocked state shown in FIG. Can do.

  Further, when the drive cylinder 73 is returned to the retracted position and the rotating arm 71 is separated from the movable connecting portion 61, the pressing plate 105 is separated from the unlocking arm 107, and is thus connected to the rotation center shaft 33. The unlocking arm 107 is in the position indicated by a two-dot chain line in FIG. 6 and can be in the locked state shown in FIG.

  As described above, since the unlocked state and the locked state can be switched by connecting or disconnecting the external drive mechanism 59 to the moving body 3, when performing unlocking using compressed air, as in the prior art, An air piping joint mechanism, which is required when compressed air is sent from the external drive mechanism 59, becomes unnecessary, and the structure can be simplified and the unlocking operation can be performed in a short time.

It is front sectional drawing in alignment with the CC line of FIG. 2 of the linear rail lock cancellation | release apparatus which shows one Embodiment of this invention. It is a plane sectional view along the AA line of the linear rail lock release device of Drawing 1. It is a side cross section along the BB line of the linear rail unlocking | release apparatus of FIG. It is front sectional drawing which shows the lock fixing state of the linear rail lock release apparatus of FIG. It is sectional drawing which shows the detail of the part which supports the lock plate of the linear rail lock release device of FIG. It is a front view which shows the structure which moves the moving body of the linear rail lock release apparatus of FIG. 1 by an external drive mechanism at the time of lock release. FIG. 7 is a right side view of FIG. 6. FIG. 7 is a plan view of FIG. 6.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Linear rail 3 Moving body 11 Lock plate 13,15 Support spring (lock plate support means)
19a, 19b Tapered surface 21, 23 Round bar (pressing member)
25, 27 Pressing spring (elastic means)
29, 31 Cam member 33 Center axis of rotation of cam member 59 External drive mechanism 71 Rotating arm 71a Connection recess (connection portion)
73 Drive cylinder (drive means)
105 Press plate (Press release member for unlocking)
107 Unlocking arm

Claims (6)

A taper surface is provided on a surface of the movable body that can move along the linear rail and faces the surface of the linear rail, and is arranged to be movable between the surface of the linear rail and the taper surface, and by elastic means, A pressure that presses against the surface of the linear rail and locks the movable body against the linear rail by being pressed along the tapered surface toward the side where the distance between the tapered surface and the surface of the linear rail is narrow. A cam member that provides a member and moves the pressing member against the elastic means and releases the lock fixing state by rotating the outer periphery of the pressing member in the lock fixing state against the elastic means by pressing. the provided, wherein the surface of the linear rail between the pressing member, the toward and away from the movable locking plate provided for the surface of the linear rail, the middle of the cam member The pressing members are respectively disposed on both sides thereof, and the taper surface and the lock plate are provided corresponding to the pressing members, respectively, and the lock plates corresponding to the pressing members are integrated with each other. A lock plate support means is provided that floats from the surface of the linear rail when unlocked, and the lock plate support means comprises a pair of support springs that elastically support from both sides of the integrated lock plate. The linear rail unlocking device according to claim 1, wherein opposite sides are located farther from the linear rail than the opposite sides . The linear rail lock release device according to claim 1, wherein the pressing member is a cylindrical member that can roll along the tapered surface. An external drive mechanism that moves the movable body along the linear rail when unlocked is provided, and when the external drive mechanism is connected to the movable body, the cam member in the locked state is rotated to be in the unlocked state. linear rail unlocking device according to claim 1 or 2, characterized in that a lock release pressing member. The external drive mechanism includes a rotating arm that swings by driving means, a connecting portion that can be connected to the moving body is provided at the tip of the rotating arm, and the unlocking pressing member is provided near the connecting portion. The linear rail unlocking device according to claim 3, wherein An unlocking arm is connected to the rotation center axis of the cam member, and the unlocking pressing member of the external drive mechanism contacts and presses against the unlocking arm, thereby rotating the cam member. The linear rail unlocking device according to claim 3 or 4, wherein the unlocking state is achieved. A taper surface is provided on a surface of the movable body that can move along the linear rail and faces the surface of the linear rail, and is arranged to be movable between the surface of the linear rail and the taper surface, and by elastic means, A pressure that presses against the surface of the linear rail and locks the movable body against the linear rail by being pressed along the tapered surface toward the side where the distance between the tapered surface and the surface of the linear rail is narrow. A member is provided, the cam member is rotated, and the outer peripheral portion thereof is pressed against the pressing member in the lock fixing state, thereby pressing the member against the elastic means to move the lock fixing state. a linear rail unlocking method for releasing, between the surface and the pressing member of the linear rail, accessible away movement relative to the surface of the linear rail Rokkupu And the pressing members are arranged on both sides of the cam member, and the taper surface and the lock plate are provided corresponding to the pressing members, respectively. The integrated lock plate is supported from both sides by support springs in which the opposite sides are separated from the linear rail rather than the opposite sides so that the lock plate is lifted from the surface of the linear rail when unlocked. Characteristic linear rail unlocking method.

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