JP2009103645A - Slide height adjustment mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slide height adjustment mechanism for manually adjusting the height of a holder or the like. <P>SOLUTION: This slide height adjustment mechanism 50 includes upper and lower shafts 60 and 70 disposed in one axial direction and used for adjusting the height of the lower shaft 70 relative to the upper shaft 60. This mechanism 50 includes a pair of clamps 51 and 52 for firmly fastening the lower and upper shafts 70 and 60. A radially-protrusive annular wedge part 73 is formed on at least one of the upper and lower shafts 60 and 70. An annular recessed part 54 to be pressed against the wedge part 73 is formed in each of the clamps 51 and 52. The lower and upper shafts 70 and 60 are together joined on one axis by tightening the respective clamps 51 and 52. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a slide vertical position adjusting mechanism that adjusts the vertical position of a lower shaft relative to an upper shaft.

  In the torsion test apparatus disclosed in Patent Document 1, torsional torque is repeatedly applied to a specimen of various parts and materials by a servo motor, and the torsion detector outputs the output torque of the specimen in a state where the torque is loaded. It detects and conducts torsional fatigue tests.

  In this torsion test apparatus, a servo motor is arranged so as to rotate a specimen around a horizontal axis, and a servo motor, a specimen, and a torsion detector are provided side by side in the horizontal axis direction.

When changing the position of the holder that holds the specimen according to the length of the specimen, the holder can be manually moved in the horizontal axis direction.
Japanese Unexamined Patent Publication No. 2007-107955

  By the way, in the torsional testing device in which the servo motor, specimen, and torsion detector are arranged in the vertical direction (vertical axis direction), the vertical position of the holder is changed according to the length of the specimen. It is necessary to move the holder and the torsion detector in the vertical direction against gravity.

  For this reason, it is conceivable to provide a lifting platform that supports the fixed-side holder so that it can be lifted and a lifting mechanism that automatically lifts and lowers the lifting platform via an actuator. In this case, the length of the specimen is reduced. There is a problem that it is necessary to control the operation of the lifting mechanism using a sensor or the like to detect, and the structure of the torsion test apparatus is complicated, resulting in an increase in product cost.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a slide vertical position adjustment mechanism that can manually adjust the vertical position of a holder or the like.

  The present invention is a slide vertical position adjusting mechanism 50 that includes an upper shaft and a lower shaft arranged in the same axial direction, and adjusts the vertical position of the lower shaft relative to the upper shaft. A pair of clamps for constraining the shaft, forming an annular wedge portion projecting radially on at least one of the upper shaft and the lower shaft, and forming an annular recess pressed against the annular wedge portion on each clamp; By fastening each clamp, the lower shaft and the upper shaft are coupled on the same axis.

  According to the present invention, each clamp is loosened to relatively displace the lower shaft and the upper shaft in the axial direction, and the upper and lower shafts are vertically moved relative to the upper shaft in a state where the relative rotation between the upper shaft and the lower shaft is locked. It is easy to adjust the position manually.

  By fastening each clamp, the annular recess is pressed against the annular wedge portion, and the lower shaft and the upper shaft can be coupled with high accuracy on the same axis.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  In the torsion test apparatus 1 shown in FIG. 1, for example, a torsional torque is applied to a specimen 2 such as an artificial bone by a servo motor 5, and the torsion detector 6 outputs an output torque of the specimen 2 in a state where the torque is loaded. Is detected, and a torsional fatigue test or the like is performed.

  The servomotor 5 repeats forward rotation and reverse rotation by a controller (not shown), and a torsional torque is applied to the specimen 2 by this rotation. The controller performs feedback control to bring the detected torque detected by the torsion detector 6 closer to the set torque.

  As the torque detector 6, various torque detectors using strain gauges, optical sensors, and the like can be used.

  This torsion test apparatus 1 is arranged such that the servo motor 5 rotates the specimen 2 around the vertical axis, and the servo motor 5, the specimen 2 and the torsion detector 6 are provided side by side in the vertical direction. The installation space is reduced.

  The torsion test apparatus 1 includes a rotating side holder 3 that holds the lower end portion of the specimen 2 and a fixed side holder 4 that holds the upper end portion of the specimen 2. The rotating side holder 3 has a jig for detachably holding the lower end portion of the specimen 2, while the fixed side holder 4 has a jig for detachably holding the upper end portion of the specimen 2.

  A servomotor (torque load means) 5 is connected to the rotating side holder 3, while a torsion detector 6 is connected to the fixed side holder 4. A controller (not shown) inputs the detection signal of the detector 6 and controls the operation of the servo motor.

  The rotating side holder 3 is supported by the gantry 10 so as to be rotatable around a vertical axis via a bearing 11, and is connected to the servo motor 5 via a coupling 7.

  The fixed side holder 4 is connected to the torsion detector 6 via the slide vertical position adjusting mechanism 50 and the coupling 22.

  In order to adjust the interval between the rotating side holding tool 3 and the fixed side holding tool 4 according to the length of the specimen 2, the lifting table 20 that supports the fixed side holding tool 4, and the lifting table 20 is connected to the motor 34. An elevating mechanism 30 that elevates and lowers by operation is provided.

  The lifting platform 20 is formed in a rectangular shape on a plan view, and is supported so as to be movable up and down via four columns. A pair of screw shafts 31 and a pair of guide shafts 35 that are arranged diagonally to the lifting platform 20 are provided as four columns standing on the gantry 10.

  The screw shaft 31 and the guide shaft 35 are covered with a cylindrical boot 39, and each exposed portion is protected from dust.

  The two screw shafts 31 are interlocked with each other via a timing belt and a pulley (not shown), and when one of the screw shafts 31 is rotationally driven by a motor 34, each screw shaft 31 rotates in synchronization.

  Travel nuts 33 that are screwed onto the screw shafts 31 are provided, and the travel nuts 33 are fixed to the diagonals of the lifting platform 20. As each screw shaft 31 rotates in synchronization, the two travel nuts 33 are moved up and down in synchronization, and the lifting platform 20 is moved up and down.

  Slide sleeves 36 slidably fitted to the respective guide shafts 35 are provided, and the respective slide sleeves 36 are fixed to the diagonal of the lifting platform 20. When the lifting platform 20 moves up and down, each slide sleeve 36 slides with respect to the guide shaft 35 and is kept horizontal so that the posture of the lifting platform 20 does not tilt.

  Each slide sleeve 36 is provided with a slide lock mechanism 37. The slide lock mechanism 37 is a lock that tightens the guide shaft 35 by the operator turning the lever 38 in one direction, locks the slide sleeve 36 against the guide shaft 35, and stops the lifting platform 20 from moving up and down. State. On the other hand, the slide lock mechanism 37 releases the tightening of the guide shaft 35 and allows the slide sleeve 36 to slide relative to the guide shaft 35 when the operator performs an operation of rotating the lever 38 to the other side. And

  When adjusting the vertical position of the elevator 20, the operator operates the lever 38 to bring the slide lock mechanism 37 into the unlocked state, and then operates the controller 34 (not shown) to operate the motor 34 to raise and lower the elevator 20. After the movement of the lifting platform 20 is stopped at an arbitrary position, the lever 38 is operated to bring the slide lock mechanism 37 into the locked state, and the lifting platform 20 is fixed. Thus, the elevating mechanism 30 roughly adjusts the vertical position of the elevating platform 20 by the operation of the operator.

  The slide vertical position adjustment mechanism 50 is used by the operator to manually adjust the vertical position of the fixed side holder 4. After the vertical position of the lifting platform 20 is roughly adjusted by the lifting mechanism 30 as described above, the vertical position of the fixed side holder 4 is finely adjusted by the slide vertical position adjusting mechanism 50.

  The slide vertical position adjusting mechanism 50 includes a lower shaft 70 connected to the stationary holder 4, an upper shaft 60 connected to the torsion detector 6, and the lower shaft 70 and the upper shaft 60 on the same axis. Are provided with a pair of clamps 51 and 52 coupled together.

  The upper shaft 60 is rotatably supported by the lifting platform 20 via the bearing 21, and the upper end portion thereof is connected to the torsion detector 6 via the coupling 22.

  The lower shaft 70 has a flange portion 74 formed at the lower end thereof, and the fixed side holder 4 is fastened to the flange portion 74.

  2A is a plan view of the upper shaft 60, FIG. 2B is a side view of the upper shaft 60, and FIG. 2C is a side view of the lower shaft 70.

  As a relative rotation locking means for locking the relative rotation between the lower shaft 70 and the upper shaft 60, a central hole 66 extending in the axial direction in the upper shaft 60 and an opening in the inner peripheral surface of the central hole 66 are axial. A key groove 67 that extends in the direction of the axis is formed, while a cylindrical central axis 71 that extends in the axial direction is formed on the lower shaft 70, and a rotation locking key 72 that protrudes from the central axis 71 is formed.

  The center shaft 71 is slidably fitted in the center hole 66, and the rotation lock key 72 is slidably fitted in the key groove 67, whereby relative rotation between the lower shaft 70 and the upper shaft 60 is achieved. Lock.

  The upper shaft 60 has a columnar cylindrical shaft portion 65 extending in the axial direction, and is opened at a lower end of the cylindrical shaft portion 65 so that a center hole 66 and a key groove 67 are opened.

  The relative rotation locking means is not limited to this, and forms a center hole extending in the axial direction in the lower shaft 70 and a groove extending in the axial direction by opening in the inner peripheral surface of the center hole. A cylindrical central axis extending in the axial direction and a key protruding from the central axis may be formed on the shaft 60.

  The lower shaft 70 has an annular wedge portion 73 projecting in a disk shape in the radial direction, and a central shaft 71 projects in the axial direction from the upper end surface of the annular wedge portion 73.

  The annular wedge portion 73 has a cylindrical outer peripheral surface 76 and upper and lower inclined surfaces 75 and 79 extending in a conical shape across the cylindrical outer surface 76, and has a tapered cross-sectional shape.

  3 is an exploded perspective view of the slide vertical position adjusting mechanism 50, FIG. 4A is a plan view showing the configuration of the slide vertical position adjusting mechanism 50, and FIG. 4B is a side view of the same. .

  The pair of clamps 51 and 52 are fastened to each other via four bolts 59 to restrain the cylindrical shaft portion 65 of the upper shaft 60 and the annular wedge portion 73 of the lower shaft 70. The upper shaft 60 is coupled on the same axis.

  The number of bolts 59 is not limited to this, and may be increased or decreased. Moreover, although each bolt 59 is fastened via a tool, it is good also as a structure fastened not via this but not via a tool.

  Each of the clamps 51 and 52 is formed in a semi-cylindrical shape, and has an inner peripheral surface 53 that is recessed in a columnar shape and an annular recess 54 that is recessed in a disk shape.

  The inner peripheral surface 53 has substantially the same diameter as the cylindrical shaft portion 65 of the upper shaft 60, and comes into contact with the cylindrical shaft portion 65 of the upper shaft 60 without a gap.

  The annular recess 54 has inclined surfaces 55 and 56 that contact the inclined surfaces 75 and 79 of the annular wedge portion 73.

  The clamp 51 is formed with a screw hole 57 into which each bolt 59 is screwed. Bolt holes 58 through which the respective bolts 59 are inserted are formed in the clamp 52.

  In a state where the clamps 51 and 52 are fastened through the bolts 59, the inner peripheral surfaces 53 are pressed against the cylindrical shaft portion 65 of the upper shaft 60, and the inclined surfaces 55 and 56 of the annular recesses 54 are By being pressed against the inclined surfaces 75 and 79 of the annular wedge portion 73, the cylindrical shaft portion 65 of the upper shaft 60 and the annular wedge portion 73 of the lower shaft 70 are restrained, and the lower shaft 70 and the upper shaft 60 are connected. Join on the same axis.

  Not limited to this, an annular wedge portion may be formed on the upper shaft 60, and a cylindrical shaft portion may be formed on the lower shaft 70.

  A disc-shaped flange portion 74 is formed at the lower end portion of the lower shaft 70 so as to be positioned below the clamps 51 and 52. A plurality of screw holes 75 are formed at equal intervals in the flange portion 74, and bolts (not shown) are screwed into the screw holes 75, and the fixed side holder 4 is fastened to the flange portion 74 via the bolts. The

When the specimen 2 is attached to the torsion test apparatus 1, the following procedure is performed.
-Raise the lifting platform 20 and raise the lower shaft 70 relative to the upper shaft 60.
-Hold the lower end of the specimen 2 on the rotating side holder 3. As a result, the specimen 2 is stood on the rotating side holder 3.
The elevator 20 is lowered, the elevator 20 is stopped at a position before the fixed side holder 4 contacts the specimen 2, the slide lock mechanism 37 is fastened, and the elevator 20 is moved relative to the gantry 10. Fix it. At this time, the lower shaft 70 is held at a position raised with respect to the upper shaft 60 via each bolt 59.
After loosening each bolt 59, the lower shaft 70 is lowered with respect to the upper shaft 60, and the lower shaft 70 is lowered at a position where the fixed side holder 4 contacts the specimen 2 at the upper end portion of the specimen 2. The upper shaft 60 is fixed to the lower shaft 70 by fastening the bolts 59.
-Hold the upper end of the specimen 2 on the fixed side holder 4.

  Thereby, when changing the space | interval of the rotation side holder 3 and the fixed side holder 4 according to the length of the test body 2, after the vertical position of the raising / lowering stand 20 is roughly adjusted by the raising / lowering mechanism 30, it slides up and down. The vertical position of the fixed side holder 4 is finely adjusted manually by the position adjusting mechanism 50. Since the weight of the slide vertical position adjusting mechanism 50 that is manually operated by the operator is much smaller than the weight of the lifting platform 20 or the like, the vertical position of the fixed side holder 4 is finely adjusted according to the length of the specimen 2. Can be easily done.

  Thus, after holding the upper and lower end portions of the specimen 2 on the rotating side holder 3 and the fixed side holder 4, the torsional testing device 1 is operated, and the servo motor 5 causes the rotating side holder 3 to become the fixed side holder 4. A torsional fatigue test or the like in which the torsional torque is repeatedly applied to the specimen 2 by relative rotation is performed.

  The present invention is a slide vertical position adjusting mechanism 50 that includes an upper shaft 60 and a lower shaft 70 arranged in the same axial direction and adjusts the vertical position of the lower shaft 70 with respect to the upper shaft 60. And a relative rotation locking means for locking the relative rotation of the lower shaft 70, and a pair of clamps 51, 52 for restraining the lower shaft 70 and the upper shaft 60. An annular wedge portion 73 projecting in the radial direction is formed on at least one side, an annular recess 54 pressed against the annular wedge portion 73 is formed on each clamp 51, 52, and the clamps 51, 52 are fastened to lower shafts 70 and the upper shaft 60 are coupled on the same axis.

  As a result, the clamps 51 and 52 are loosened to relatively displace the lower shaft 70 and the upper shaft 60 in the axial direction, and the upper shaft 60 in a state where the relative rotation between the upper shaft 60 and the lower shaft 70 is locked. It is possible to easily adjust the vertical position of the lower shaft 70 with respect to the manual operation.

  By fastening the clamps 51 and 52, the annular recess 54 is pressed against the annular wedge portion 73, and the lower shaft 70 and the upper shaft 60 can be accurately coupled on the same axis.

  In the present embodiment, a relative rotation locking means for locking the relative rotation of the upper shaft 60 and the lower shaft 70 is provided. As the relative rotation locking means, one of the upper shaft 60 and the lower shaft 70 is axially arranged. A central hole 66 extending in the axial direction and a key groove 67 extending in the axial direction by opening in the inner peripheral surface of the central hole 66, and a cylindrical central axis 71 extending in the axial direction on the other side and projecting from the central axis 71. A rotation locking key 72 is formed, and the center shaft 71 and the rotation locking key 72 are slidably fitted into the center hole 66 and the key groove 67.

  Thereby, the rotation locking key 72 is slidably fitted to the key groove 67, and the relative rotation between the upper shaft 60 and the lower shaft 70 is locked. In this case, processing such as splines is not necessary, and the cost of the product can be reduced.

  In the present embodiment, in the torsional testing apparatus 1 that applies torsional torque to the specimen 2, a flange portion 74 is formed on at least one end of the upper shaft 60 and the lower shaft 70, and the specimen is provided on the flange portion 74. The holding tool 4 which holds the one end part of 2 is attached.

  Thereby, when adjusting the vertical position of the fixed side holder 4 according to the length of the specimen 2, the vertical position of the fixed side holder 4 is finely adjusted manually by the slide vertical position adjustment mechanism 50. Since the weight of the slide vertical position adjusting mechanism 50 that is manually operated by the operator is much smaller than the weight of the lifting platform 20 or the like, this adjustment can be easily performed.

  Further, since it is not necessary to control the operation of the elevating mechanism 30 using a sensor or the like that detects the length of the specimen 2, the structure of the torsional testing apparatus 1 can be avoided from being complicated, and the cost of the product can be reduced. .

  Next, another embodiment shown in FIGS. 5 and 6 will be described. This basically has the same configuration as that of the above-described embodiment shown in FIGS. 1 to 4, and only different portions will be described. In addition, the same code | symbol is attached | subjected to the same structure part as the said embodiment.

  5A is a plan view of the upper shaft 60, FIG. 5B is a side view of the upper shaft 60, and FIG. 5C is a side view of the lower shaft 70.

  As a relative rotation locking means for locking relative rotation between the lower shaft 70 and the upper shaft 60, a spline hole 68 extending in the axial direction is formed in the upper shaft 60, while a columnar shape extending in the axial direction in the lower shaft 70. The spline shaft 78 is formed. The spline hole 68 and the spline shaft 78 are formed with spline grooves that engage with each other.

  In this case, when the spline shaft 78 is slidably fitted into the spline hole 68, the relative rotation between the lower shaft 70 and the upper shaft 60 is accurately locked.

  The relative rotation locking means is not limited to this, and a spline shaft may be formed on the upper shaft 60 while a spline hole may be formed on the lower shaft 70.

  In the present embodiment, a relative rotation locking means for locking the relative rotation of the upper shaft 60 and the lower shaft 70 is provided. As the relative rotation locking means, one of the upper shaft 60 and the lower shaft 70 is axially arranged. And a spline shaft 78 extending in the axial direction is formed on the other side, and the spline shaft 78 is slidably fitted into the spline hole 68.

  Thereby, the relative rotation of the lower shaft 70 and the upper shaft 60 can be locked with high accuracy.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

  The slide vertical position adjusting mechanism of the present invention is not limited to a torsion test apparatus, but can be used for other machines, equipment, and the like.

1 is a front view of a torsion test device showing an embodiment of the present invention. The top view and side view of an upper shaft similarly, and the side view of a lower shaft. The exploded view of a slide up-and-down position adjustment mechanism similarly. The top view and side view of a slide up-and-down position adjustment mechanism similarly. Other Embodiment is a top view of an upper shaft, a side view, and a side view of a lower shaft. The top view and side view of a slide up-and-down position adjustment mechanism similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Torsional test apparatus 50 Slide vertical position adjustment mechanism 51,52 Clamp 54 Annular recessed part 60 Upper shaft 65 Cylindrical shaft part 66 Center hole 67 Key groove 68 Spline hole 70 Lower shaft 72 Rotation locking key 73 Annular wedge part 74 Flange part 78 Prine shaft

Claims (4)

An upper shaft and a lower shaft arranged in the same axial direction,
A slide vertical position adjusting mechanism for adjusting the vertical position of the lower shaft relative to the upper shaft,
A pair of clamps that restrain the lower shaft and the upper shaft;
Forming an annular wedge portion projecting radially in at least one of the upper shaft and the lower shaft;
An annular recess is formed on each of the clamps to be pressed against the annular wedge,
A slide vertical position adjustment mechanism characterized in that the lower shaft and the upper shaft are coupled on the same axis by fastening the clamps. A relative rotation locking means for locking the relative rotation of the upper shaft and the lower shaft;
As the relative rotation locking means, a central hole extending in the axial direction on one of the upper shaft and the lower shaft and a key groove opening in the inner peripheral surface of the central hole and extending in the axial direction are formed on the other. A cylindrical center axis extending in the axial direction and a rotation lock key protruding from the center axis are formed, and the center axis and the rotation lock key can slide with respect to the center hole and the key groove, respectively. The slide vertical position adjusting mechanism according to claim 1, wherein the slide vertical position adjusting mechanism is fitted. A relative rotation locking means for locking the relative rotation of the upper shaft and the lower shaft;
As the relative rotation locking means, a spline hole extending in the axial direction is formed on one of the upper shaft and the lower shaft, and a spline shaft extending in the axial direction is formed on the other, and the spline shaft is formed with respect to the spline hole. The slide vertical position adjusting mechanism according to claim 1, wherein the slide vertical fitting is slidably fitted. In a torsional testing device that applies torsional torque to a specimen,
Forming a flange at at least one end of the upper shaft and the lower shaft;
The slide vertical position adjusting mechanism according to any one of claims 1 to 3, wherein a holder for holding one end of the specimen is attached to the flange portion.

Images