JP2017080829A - Position detection apparatus and fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the position of the tip of a cutter more accurately, more surely, and more easily by reducing damages of the thinner cutter.SOLUTION: A position detection apparatus 1 is provided with: a cutter 2 fitted to a cutting device; a lever 11 vertically displaced in the position of a force point and the position of an application point in which vertical positions are approximately similar when the tip 3 of the cutter 2 touches the force point from an upper side down while detecting the vertical positions; a holding part 12 that holds the vertical position of the force point of the lever 11 when the tip 3 of the cutter 2 does not touch the force point of the lever 11; a lever-type dial gauge 13 that detects displacement of the vertical position of the application point of the lever 11; and a height adjusting mechanism 14 that adjusts the vertical position of the lever-type dial gauge 13 with respect to the vertical position of the lever 11.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a position detection device and a jig, and more particularly, to a position detection device and a jig that detect the position of a cutting edge of a cutting tool attached to a cutting apparatus or detect a lever dial gauge attached thereto. .

  In recent years, due to the improvement in the manufacturing technology of blades, end mills and drills having a diameter of 10 μm have come to be used in cutting apparatuses. Thereby, finer processing can be performed on the workpiece. Here, the workpiece is a workpiece. When a cutting tool is mounted on the cutting apparatus, it is necessary to detect the position of the cutting edge of the tool before cutting, thereby making it necessary to correct the so-called tool length.

  Conventionally, a touch probe for electrically detecting contact is set up and held at an appropriate position on the side edge of the pallet, and the origins of the X and Z axes are automatically corrected with a test bar inserted into the main shaft. Some have been made (see, for example, Patent Document 1).

  Further, the lever is pivotally supported by the fulcrum shaft, the stopper abuts against the lever, positions the lever, and a contact is provided at one end of the lever, and at the other end. A low-pressure simple position detection probe is also proposed in which a slit is provided and the slit is sandwiched between a light projecting unit and a light receiving unit (see, for example, Patent Document 2). In this case, when the contact comes into contact, the lever rotates and the slit is displaced, so that the light to the light receiving unit is blocked and the position in contact with the contact is detected.

  Furthermore, a front milling cutter, which is a rotary cutting tool, is fixed to the indexing table, and a key is fitted on the rear surface of the indexing table, and the probe is brought into contact with the cutting edge of the throw-away tip mounted on the front milling cutter from the rake face side. The displacement of the probe is transmitted to the other end of the lever lever through the L-shaped lever lever, and the relationship between the reference point and the throw-away tip is measured by reading the dial gauge that contacts the lever lever. Some screw positions are also specified (see, for example, Patent Document 3).

JP 60-177848 A JP 52-141655 A JP-A-7-204993

  However, if a blade such as a mill or a drill is thin, even if an electrical contact is to be detected, the electrical resistance is large and the contact cannot be reliably detected. Also, if the blade is thin, optical detection using a laser or the like becomes difficult. When using with a light projection part and a light-receiving part like patent document 2, a dead zone is comparatively large, an exact position cannot be detected, but big force will be applied to a cutter by the time of detection. When an L-shaped lever is used as in Patent Document 3, the L-shaped lever must be moved with a force that is greater than the weight of the L-shaped lever, so that when the L-shaped lever is operated, a large force is applied to the blade. If the force applied when detecting the position of the blade edge is large, the blade will be damaged or deformed.

  The present invention has been made in view of such a situation, and makes it possible to detect the position of the blade edge of the blade more accurately, more reliably, and more easily with less damage to the thinner blade. Is. In addition, it is possible to detect the position of the blade edge of the blade more accurately, more reliably, and more easily by using the lever type dial gauge that is mounted with less damage to the thinner blade.

  The position detection device according to one aspect of the present invention is a blade mounted on a cutting device, and when the blade tip of the blade to be detected in the vertical direction touches the power point from the upper side downward, the vertical direction is detected. The position of the force point and the position of the action point that are almost the same position are displaced in the vertical direction, and when the blade tip of the blade is not touching the force point, the vertical position of the leverage point is maintained. Means, a lever type dial gauge for detecting the displacement of the lever operating point in the vertical direction, and an adjustment mechanism for adjusting the vertical position of the lever type dial gauge with respect to the lever vertical position.

  In the position detection device according to one aspect of the present invention, the position of the force point and the position of the action point in the vertical direction are substantially the same, and the position of the force point in the vertical direction is maintained. A displacement of the vertical position of the lever operating point is detected by a lever type dial gauge whose position in the direction is adjusted. Since the position of the lever point and the position of the action point in the vertical direction are almost the same, it is easier to balance the weight of the lever, and even if the force when the blade tip touches is smaller, the position of the action point Is displaced in the vertical direction, the position of the blade edge of the blade can be detected more reliably. In addition, since the position of the leverage point and the position of the action point in the vertical direction are substantially the same, when trying to touch the force point downward from the upper side with the cutting edge of the cutter attached to the cutting apparatus, By making reference to the position of the force point and the position of the action point, it is easy to aim at the leverage point.

  Since the position of the lever in the vertical direction is maintained by the holding means, the position of the blade edge of the blade can be detected more accurately. In addition, since the adjustment mechanism adjusts the vertical position of the lever type dial gauge relative to the vertical position of the lever, the measured value of the lever type dial gauge is measured when the edge of the blade is not touching the lever point. For example, by giving an offset so as to indicate a value of 10 μm to 100 μm, the dead zone of the initial movement can be made smaller, and when the blade edge of the blade touches the power point, the position of the blade edge of the blade can be detected more reliably. When the blade edge of the tool is in contact with the leverage point and the force point is being pushed by the blade edge, the lever-type dial gauge display changes, so it is easy to check the position of the blade edge where the blade edge has started to contact the force point. The position of the blade edge of the cutter can be detected more accurately, more reliably, and more easily.

  Furthermore, since the lever type dial gauge detects the displacement of the position of the operating point, the lever type dial gauge body can be disposed away from the lever, and the cutting edge of the cutting tool mounted on the cutting apparatus can be used. When trying to touch the force point from the top downwards, the lever type dial gauge does not get in the way, the blade tip contact with the lever type dial gauge can be avoided, the smaller blade is less damaged and easier In addition, the position of the blade edge of the blade can be detected. In this way, the position of the blade edge of the blade can be detected more accurately, reliably, and more easily with less damage to the thinner blade.

  The lever arm can be flat. It is easier to visually check the position of the arm, the position of the force point in the vertical direction, and the position of the action point, and when trying to touch the force point from the upper side downward with the blade tip of the cutting tool, aim at the force point. It becomes easy to attach, the contact of the blade edge with the lever type dial gauge can be avoided, and the position of the blade edge of the blade can be detected more accurately, more reliably and more easily.

  The upper surface of the part where the lever is provided can be recessed downward with respect to the upper surface of the force point part and the upper surface of the action point part. When you try to touch the power point from the upper side with the cutting edge of the cutting tool mounted on the cutting device, you can prevent the cutting edge from accidentally contacting the fulcrum and reduce the damage to the finer cutting tool. be able to.

  The length from the leverage point to the action point can be set to 20 mm to 40 mm. Since the lever can be moved with a smaller force while making it easier to visually check the lever, the damage to the thinner blade can be reduced.

  The lever can be provided with a target portion as a target for touching the blade edge of the blade. It becomes easier to confirm the position of the force point, and when trying to touch the force point from the upper side downward with the cutting edge of the cutting tool mounted on the cutting device, it becomes easier to aim at the force point, and the blade comes into contact with other parts. The damage can be prevented, and the position of the blade edge of the blade can be detected more accurately, more reliably, and more easily.

  The lever can be provided with a contact portion for the lever type dial gauge to touch. It is easy to confirm the position of the action point, and when the blade tip of the cutter is not touching the leverage point, it is easy to give an offset so that the measured value of the lever type dial gauge indicates a value of 10 μm to 100 μm, for example. When the dead zone of the initial movement is further reduced and the cutting edge of the cutting tool touches the power point, the position of the cutting edge of the cutting tool can be detected more reliably.

  The lever type dial gauge can output an electric signal indicating a result of detecting the displacement to the outside. By doing in this way, the cutting device to which the position detection device is attached can acquire the electrical signal, thereby preventing the user from making mistakes in reading or giving instructions and making the tool length correction easier. The position of the blade edge of the blade can be detected more accurately, more reliably, and more easily.

  A jig according to one aspect of the present invention is a cutter that is equipped with a lever type dial gauge and is attached to a cutting apparatus, and the vertical position of the cutting edge of the cutter that is to be detected in the vertical direction. This is a jig for detecting the lever type dial gauge. When the cutting edge of the blade touches the force point from the upper side downward, the position of the force point and the position of the action point where the vertical position is almost the same are If the blade tip of the cutter is not touching the lever point, the holding means for keeping the lever point in the vertical direction and the lever for detecting the vertical position displacement of the lever point are detected. A dial dial gauge, and an adjustment mechanism that adjusts the vertical position of the lever type dial gauge with respect to the vertical position of the lever.

  In the jig according to one aspect of the present invention, the position of the force point and the position of the action point in the vertical direction are substantially the same, and the position of the force point in the vertical direction is maintained, Thus, the lever-type dial gauge whose vertical position is adjusted with respect to the vertical position of the lever detects the displacement of the vertical position of the lever operating point. Since the position of the lever point and the position of the action point in the vertical direction are almost the same, it is easier to balance the weight of the lever, and even if the force when the blade tip touches is smaller, the position of the action point Is displaced in the vertical direction, the position of the blade edge of the blade can be detected more reliably. In addition, since the position of the leverage point and the position of the action point in the vertical direction are substantially the same, when trying to touch the force point downward from the upper side with the cutting edge of the cutter attached to the cutting apparatus, By making reference to the position of the force point and the position of the action point, it is easy to aim at the leverage point.

  Since the position of the leverage point in the vertical direction is maintained by the holding means, the position of the blade edge of the blade can be detected more accurately by the lever dial gauge attached. In addition, since the adjustment mechanism adjusts the vertical position of the lever type dial gauge relative to the vertical position of the lever, the measured value of the lever type dial gauge is measured when the edge of the blade is not touching the lever point. For example, by giving an offset so as to indicate a value of 10 μm to 100 μm, the dead zone of the initial movement can be made smaller, and the position of the blade edge of the blade can be detected more reliably when the blade edge of the blade touches the power point. When the blade edge of the tool is in contact with the leverage point and the force point is being pushed by the blade edge, the lever-type dial gauge display changes, so it is easy to check the position of the blade edge where the blade edge has started to contact the force point. The position of the blade edge of the cutter can be detected more accurately, more reliably, and more easily.

  Furthermore, since the lever-type dial gauge mounted on the adjustment mechanism detects the displacement of the position of the action point, the lever-type dial gauge body can be placed away from the lever and mounted on the cutting device. When you try to touch the force point from the upper side to the lower side with the cutting edge of the blade being used, the lever type dial gauge does not get in the way, you can avoid contact with the edge of the lever type dial gauge and damage the finer blade. The position of the blade edge of the cutter can be detected more easily with less. In this way, the position of the blade edge of the blade can be detected more accurately, more reliably, and more easily with less damage to the thinner blade.

  As described above, according to the present invention, it is possible to detect the position of the blade edge of the blade more accurately, more reliably, and more easily with less damage to the thinner blade. Further, according to the present invention, it is possible to detect the position of the blade edge of the blade more accurately, more reliably, and more easily by using the lever type dial gauge mounted with less damage to the thinner blade.

1 is a perspective view illustrating an overall configuration of a position detection device 1. FIG. 1 is a perspective view illustrating an overall configuration of a position detection device 1. FIG. FIG. 3 is an enlarged perspective view showing configurations of a lever 11 and a holding unit 12. FIG. 3 is an enlarged plan view showing a configuration of a lever 11 and a holding unit 12. FIG. 4 is an enlarged side view showing the configuration of a lever 11 and a holding unit 12. FIG. 3 is an enlarged side view showing configurations of a lever 101 and a holding unit 12.

  Embodiments of the present invention will be described below. Correspondences between the configuration requirements of the present invention and the embodiments described in the detailed description of the present invention are exemplified as follows. This description is to confirm that the embodiments supporting the present invention are described in the detailed description of the invention. Accordingly, although there are embodiments that are described in the detailed description of the invention but are not described here as embodiments corresponding to the constituent elements of the present invention, It does not mean that the embodiment does not correspond to the configuration requirements. Conversely, even if an embodiment is described here as corresponding to a configuration requirement, that means that the embodiment does not correspond to a configuration requirement other than the configuration requirement. It's not something to do.

  The position detection device according to one aspect of the present invention (for example, the position detection device 1 in FIG. 1) is a blade mounted on a cutting device, and the blade edge of the blade to be detected in the vertical direction is from above. When the force point is touched downward, the position of the force point and the position of the action point that are substantially the same in the vertical direction (for example, the lever 11 in FIG. 1) and the edge of the blade When the force point is not touched, holding means for maintaining the position of the lever force in the vertical direction (for example, the holding portion 12 in FIG. 1), and a lever type dial for detecting the displacement of the position of the lever in the vertical direction A gauge (for example, the lever type dial gauge 13 in FIG. 1) and an adjustment mechanism (for example, the height adjustment mechanism 14 in FIG. 1) for adjusting the vertical position of the lever type dial gauge with respect to the vertical position of the lever. Prepare.

  Hereinafter, with reference to FIG. 1 thru | or FIG. 6, the position detection apparatus 1 of embodiment of this invention is demonstrated.

  1 and 2 are perspective views showing the overall configuration of the position detection device 1. The position detection device 1 is mounted at a reference position such as a bed surface of a NC (numerical control machining) cutting device or a machining device that is a machining center. The cutting device to which the position detection device 1 is attached can replace the blade 2 such as an end mill or a ball mill, and corrects the position of the cutting edge 3 before cutting. The position detection apparatus 1 detects the vertical position of the cutting edge 3 of the cutting tool 2 mounted on the cutting apparatus by detecting contact of the cutting edge 3 of the cutting tool 2 mounted on the cutting apparatus. The position of the cutting edge 3 in the cutting apparatus is corrected by the detected vertical position of the cutting edge 3. That is, so-called tool length correction is performed in which the relative position coordinates of the cutting apparatus are corrected. In addition, the height of the position which detects the blade edge | tip 3 of the blade 2 of the position detection apparatus 1 is measured with a height gauge etc. before or after mounting | wearing with a cutting apparatus. This measurement result is used for tool length correction.

  The position detection device 1 includes a lever 11, a holding unit 12, a lever type dial gauge 13, a height adjustment mechanism 14, a lever table 15, a gauge table 16, and a base 17.

  In FIG. 1, among the directions indicated by the coordinate axes including the X axis, the Y axis, and the Z axis representing the three-dimensional space (orthogonal coordinate space) in which processing is performed, the direction connecting the lower right and the upper left in FIG. 1 indicates the X-axis direction, the direction connecting the upper right and the lower left in FIG. 1 indicates the Y-axis direction, and the vertical direction in FIG. 1 indicates the Z-axis direction. The lower right direction is the positive direction of the X axis, the upper right direction is the positive direction of the Y axis, and the upper direction is the positive direction of the Z axis. In the following, the positive side of the Z-axis is the upper side, the negative side of the Z-axis is the lower side, the positive side of the Y-axis is the back side, the negative direction of the Y-axis is the front side, and the positive side of the X-axis is On the right side, the negative side of the X axis is also referred to as the left side. Also in the drawings after FIG. 2, the X axis, the Y axis, and the Z axis are also shown.

  FIG. 1 shows the position detection device 1 before the cutting edge 3 of the blade 2 contacts the lever 11. FIG. 2 shows the position detection device 1 when the cutting edge 3 of the blade 2 is in contact with the lever 11.

  The lever 11, the holding portion 12, the height adjusting mechanism 14, the lever table 15, the gauge table 16, and the base 17 are formed of a highly rigid material, for example, steel. The lever 11, the holding portion 12, the height adjusting mechanism 14, the lever table 15, the gauge table 16, and the base 17 may be formed of the same material or different materials.

  The lever 11 is a lever as a machine element that is a simple machine. The lever 11 is formed in a shape extending substantially linearly in the left-right direction (lateral direction). The upper surface of the lever 11 is substantially flat. An intermediate portion of the lever 11 in the left-right direction is pivotally supported so that the right end portion of the lever 11 and the left end portion of the lever 11 can swing in the vertical direction.

  Therefore, the lever 11 swings when it is pushed from the upper side to the lower side by the cutting edge 3 of the blade 2. That is, in more detail, when detecting the vertical position of the cutting edge 3 of the cutter 2 mounted on the cutting apparatus, the end of the upper surface of the lever 11 that is displaced in the vertical direction is used. Of these, the cutting edge 3 of the blade 2 is brought into contact with one end (in this case, the right end). When the cutting edge 3 of the blade 2 attached to the cutting device comes into contact with one of the ends of the upper surface of the lever 11 that is displaced in the vertical direction, the lever 11 Swings. Of the end portions of the upper surface of the lever 11 that are displaced in the vertical direction, the displacement in the vicinity of the other end portion (in this case, the left end portion) is detected by the lever type dial gauge 13. As a result, the vertical position of the blade edge 3 of the blade 2 is detected.

  The holding portion 12 includes a threaded rod and a nut that is screwed to the rod. The holding portion 12 is in contact with the lower surface of the lever 11 to hold the posture of the lever 11 before the cutting edge 3 of the blade 2 contacts. The lever type dial gauge 13 is a bar extending from the main body, and the magnitude of the displacement of the position of the probe is measured by measuring the change in the angle of the bar with the probe provided at the tip opposite to the main body. It is a measuring device which shows. The lever-type dial gauge 13 measures the vertical displacement caused by the swing of the lever 11 by bringing the measuring element into contact with the upper surface of the lever 11, and indicates the magnitude of the displacement. That is, the lever type dial gauge 13 detects the displacement in the vicinity of the other end portion (in this case, the right end portion) among the end portions on the upper surface of the lever 11 that are displaced in the vertical direction. To do.

  The lever-type dial gauge 13 is arranged with respect to the lever 11 so that the main body on which the measuring element is located on the lever 11 side and the display unit indicating the displacement of the measuring element is provided away from the lever 11. In other words, the lever type dial gauge 13 is arranged such that the main body of the lever type dial gauge 13 and the rod extending from the main body extend in a substantially straight line in the left-right direction. Therefore, the direction in which the straight line connecting the main body of the lever type dial gauge 13 and the rod extends is substantially the same as the direction in which the straight line connecting the swinging end of the lever 11 extends. That is, the lever 11 and the lever type dial gauge 13 are arranged linearly.

  The lever type dial gauge 13 is a so-called low pressure gauge capable of measuring the displacement of the position with a relatively small force of about 0.1 N to 0.5 n. The lever type dial gauge 13 may be an analog type or a digital type. In addition, the lever type dial gauge 13 may be configured to electrically measure and output an electric signal indicating a measurement result to the outside. For example, a rotary potentiometer or encoder that detects the rotation angle coaxially with a rod having a probe at the end is provided, and a calculation process is performed to convert the detected rotation angle of the rod into a displacement of the position. An electric signal indicating the displacement of the probe is output to the outside via the. Furthermore, the display unit representing the measurement value of the lever type dial gauge 13 may be turned sideways (front side or back side).

  More specifically, the holding part 12 comes into contact with the lower surface of the lever 11, which is the back side of the upper surface of the lever 11 whose displacement is measured, when the probe of the lever type dial gauge 13 comes into contact with the blade 2. The posture of the lever 11 before the cutting edge 3 contacts is maintained. That is, among the end portions on the upper surface of the lever 11 that are displaced in the vertical direction, the vicinity of the end portion where the displacement is detected is sandwiched between the measuring element of the lever type dial gauge 13 and the holding portion 12. It is. By doing in this way, the attitude | position of the lever 11 before the blade edge | tip 3 of the cutter 2 contacts can be hold | maintained more correctly. Further, since the backlash can be reduced more easily, the position of the blade edge 3 of the blade 2 can be detected more accurately and reliably.

  The lever type dial gauge 13 is attached to the height adjusting mechanism 14. The height adjustment mechanism 14 is an end portion side that is displaced upward when the lever 11 is pushed by the blade edge 3 of the swinging end portion of the lever 11, and the lever type dial gauge 13 is mounted. Of the swinging end of the lever 11, the lever type dial gauge 13 is provided at a position where it can come into contact with the end that is displaced upward when it is pushed by the cutting edge 3 of the cutter 2. In other words, the height adjusting mechanism 14 is configured such that the lever 11 is on the side opposite to the side where the lever 11 is pressed by the cutting edge 3 and the length of the lever type dial gauge 13 from the lever 11 (the side opposite to the side where the bar is provided). (The length from the end of the main body to the measuring element).

  The height adjusting mechanism 14 is a mechanism for adjusting the position of the lever type dial gauge 13 in the height direction with respect to the gauge base 16. The height adjusting mechanism 14 includes a linear guide (linear motion guide or linear sliding guide) for restricting a moving direction in which the lever type dial gauge 13 is moved only in the height direction with respect to the gauge base 16, and a gauge base 16. On the other hand, it consists of a mechanical element that moves the lever type dial gauge 13 in the height direction. For example, a mechanical element that moves the lever-type dial gauge 13 in the height direction with respect to the gauge base 16 converts a rotational motion such as a rack and pinion or a ball screw into a linear motion. In this case, the rack is fixedly provided on the gauge base 16 side, and the lever type dial gauge 13 moves in the vertical direction as the pinion rotates. The pinion is rotated by the user by a cylindrical knob. That is, in this case, when the knob of the height adjusting mechanism 14 is rotated by the user, the position in the height direction of the lever type dial gauge 13 with respect to the gauge base 16 is displaced by the rack and pinion. The height adjusting mechanism 14 may be a mechanism in which the user directly moves linearly and fixes it at a desired position by, for example, a plurality of holes and pins or clamps (clasps), or the like. The position of the lever type dial gauge 13 in the height direction may be displaced by rotating (swinging) about the axis in the X-axis direction or the Y-axis direction. . That is, the height adjustment mechanism 14 adjusts the vertical position of the lever type dial gauge 13 with respect to the vertical position of the lever 11.

  A lever 11 and a holding portion 12 are fixed to the upper surface of the lever table 15. The lever 11 and the lever 12 are arranged at a desired vertical position.

  The gauge base 16 fixes the lever type dial gauge 13 via the height adjusting mechanism 14.

  On the upper surface of the base 17, a lever base 15 and a gauge base 16 are arranged at predetermined intervals in the left-right direction. The base 17 includes a flat plate portion and a quadrangular columnar portion formed on the upper surface thereof. A gauge base 16 is screwed to the upper surface of the flat portion of the base 17. Further, a lever base 15 is screwed to the upper surface of the quadrangular columnar portion of the base 17. The position detection device 1 is placed on the cutting device so that the lower surface of the base 17 is in contact with the bed surface of the cutting device, and the position detection device 1 is attached to the cutting device. The position detection device 1 may be fixed to the cutting device by screwing or the like.

  As shown in FIG. 1, the posture of the lever 11 is held by the holding unit 12 before the cutting edge 3 of the blade 2 contacts the lever 11. Thereby, among the end portions of the upper surface of the lever 11 that are displaced in the vertical direction, the vertical position of the upper surface of the one end portion with which the cutting edge 3 of the blade 2 is brought into contact is more accurately determined. Will be retained. At this time, among the end portions of the upper surface of the lever 11 that are displaced in the vertical direction, the lower surface and the upper surface in the vicinity of the other end portion are respectively the holding portion 12 and the lever type dial gauge 13. It is sandwiched between measuring elements. At this time, the lever type dial gauge 13 shows a predetermined value.

  As shown in FIG. 2, when the cutting edge 3 of the cutter 2 comes into contact with the upper surface of one end among the end portions of the upper surface of the lever 11 that are displaced in the vertical direction, Is the end of the upper surface of the lever 11, and of the end that is displaced in the vertical direction, the vertical position of the other end is displaced upward. At this time, since the upper surface in the vicinity of the other end pushes up the measuring element of the lever type dial gauge 13, the value indicated by the lever type dial gauge 13 changes. As a result, the vertical position of the blade edge 3 of the blade 2 is detected.

  Next, details of the lever 11 and the holding unit 12 will be described. 3, 4, and 5 are an enlarged perspective view, an enlarged plan view, and an enlarged side view showing configurations of the lever 11 and the holding portion 12, respectively.

  The lever 11 is configured to be swingable. The lever 11 is configured by supporting a generally flat strip-shaped arm 21 that is linearly long in the left-right direction so as to be swingable at a fulcrum. The upper surface of the arm 21 is formed substantially horizontally. In the vicinity of the upper surface on one end side in the longitudinal direction of the arm 21, the blade edge 3 of the blade 2 to be detected in the vertical direction is brought into contact. That is, in this case, when the vertical position of the blade edge 3 of the blade 2 is to be detected, the blade edge 3 of the blade 2 is brought into contact with the vicinity of the upper surface of the right end of the arm 21.

  When the cutting edge 3 of the blade 2 to be detected in the vertical direction comes into contact with the upper surface on one end side in the longitudinal direction of the arm 21, the arm 21 swings. A displacement of the position of the upper surface on the other end side in the longitudinal direction of the swinging arm 21 is detected by the lever type dial gauge 13. That is, in this case, when detecting the vertical position of the cutting edge 3 of the blade 2, the displacement of the vertical position near the upper surface of the left end of the arm 21 is detected by the lever type dial gauge 13. Since the arm 21 is formed in a flat plate shape which is a strip shape long in the left-right direction, it is easy to balance the weight and can be swung with a smaller force.

  On the lower surface of the arm 21 of the lever 11, a bearing portion 22 is formed in which a circular surface protrudes in a horizontal columnar shape and a cylindrical hole is formed inside thereof. A shaft 31 is inserted into the hole of the bearing portion 22. Both ends of the shaft 31 are fixed to a shaft fixing portion 32 provided on the upper surface of the lever base 15 so as to protrude upward so as to sandwich the bearing portion 22 of the lever 11. For example, the shaft 31 is formed as a half screw (medium bolt). That is, the head portion side of the shaft portion of the shaft 31 has a smooth cylindrical shape, and the end portion of the shaft portion of the shaft 31 is threaded. In this case, the head portion side of the shaft portion of the shaft 31 having a smooth cylindrical shape is inserted into the bearing portion 22, and the screw on the end portion side of the shaft portion of the shaft 31 is cut into the shaft fixing portion 32. While being screwed with the screw, the seat surface of the head of the shaft 31 is fastened to the shaft fixing portion 32. By doing so, the lever 11 can be swung with a smaller force. That is, the bearing portion 22 is a sleeve into which the shaft 31 is inserted. In this way, the lever 11 is supported in a swingable manner by the fulcrum of the slide bearing composed of the bearing portion 22 and the shaft 31.

  Note that the fulcrum of the lever 11 may be a rolling bearing such as a bearing, a structure in which the recess is supported by a blade (knife edge), or a suspension type that is suspended from the upper side of the lever 11. The fulcrum of the lever 11 is not necessarily provided on the lower surface of the arm 21 but may be provided on the upper surface of the arm 21. Further, the fulcrum of the lever 11 may support the side surface of the arm 21 with, for example, a hemispherical protrusion and a hemispherical depression having a shape corresponding to the protrusion.

  A disk-like target portion 23 having a smooth upper surface is formed at one end of the upper surface of the arm 21, in this case, the right end. The target part 23 is a part that becomes a target for bringing the blade edge 3 of the blade 2 attached to the cutting apparatus into contact with the lever 11. That is, the target portion 23 is provided at the power point of the lever 11 that is one end portion (near the end portion) with which the cutting edge 3 of the blade 2 is brought into contact.

  In addition, a disc-shaped contact portion 24 having a smooth upper surface is formed at the other end of the upper surface of the arm 21, in this case, the left end. The contact part 24 is a part that is a target for contacting the measuring element of the lever type dial gauge 13. That is, the contact portion 24 is provided at the action point of the lever 11 which is the other end portion (the vicinity thereof) where the displacement is measured when the cutting edge 3 of the blade 2 touches the force point.

  The target part 23 and the contact part 24 are formed in substantially the same shape. The color of the upper surface of the target part 23 and the contact part 24 can be changed from the color of the other part of the arm 21. For example, when the color of the arm 21 is black, the color of the upper surface of the target portion 23 and the contact portion 24 can be a polished metal color. Further, when viewed from above, the lower periphery of the target portion 23 and the contact portion 24 is formed in a disk shape having a diameter larger than the diameter of the target portion 23 and the contact portion 24, so that the cutting device is mounted. When the cutting edge 3 of the blade 2 is brought into contact with the target portion 23, as shown in FIG. 4, the target portion 23 looks a double circle when viewed from above, and when viewed from the side as shown in FIG. Since the side surface of the target portion 23 looks like a staircase, it becomes easier to aim at the target portion 23. The length from the target part 23 to the contact part 24 is 20 mm to 40 mm. That is, the length of the arm 21 is approximately 20 mm to 40 mm.

  The target portion 23 and the contact portion 24 can be formed in a shape that is easy to visually recognize, such as being formed in a square plate shape, or having a cross shape on the upper surface. Further, the color of the holding portion 12, the lever type dial gauge 13, the height adjusting mechanism 14, the lever base 15, the gauge base 16 and the base 17 and the color of the arm 21 may be changed. For example, when the color of the holding portion 12, the lever type dial gauge 13, the height adjusting mechanism 14, the lever base 15, the gauge base 16, and the base 17 is black, the color of the arm 21 is a polished metal color. Can do.

  The holding unit 12 includes a bolt 41 and a nut 42. The upper end of the bolt 41 is hemispherical. A screw is cut on the side surface of the bolt 41. The nut 42 is screwed into a screw on the side surface of the bolt 41. The bolt 41 is screwed into a screw hole provided on the upper surface of the lever table 15, and is further tightened to the upper surface of the lever table 15 by a nut 42. By tightening the upper surface of the lever 15 with the nut 42, the bolt 41 is prevented from loosening. When the upper end of the bolt 41 of the holding unit 12 contacts the back surface of the contact unit 24 of the arm 21, the vertical position of the upper surface of the target unit 23 is held. It can be said that the holding unit 12 keeps the posture of the arm 21 horizontal when the cutting edge 3 of the blade 2 is not in contact with the upper surface of the arm 21.

  The holding unit 12 can also hold the arm 21 by magnetic force and hold the vertical position of the upper surface of the target unit 23. In this case, the holding portion 12 can be provided on the upper surface of the arm 21 in the vicinity of the target portion 23 or on the side surface of the arm 21.

  The holding unit 12 can also hold the arm 21 by sucking air and hold the position of the upper surface of the target unit 23 in the vertical direction. Furthermore, the holding part 12 can also hold the arm 21 with a spring to hold the vertical position of the upper surface of the target part 23. In either case, the holding portion 12 can be provided on the upper surface of the arm 21 in the vicinity of the target portion 23 or on the side surface of the arm 21.

  When the cutting edge 3 of the blade 2 is not in contact with the target portion 23 of the lever 11, the posture of the arm 21 is made almost horizontal by the holding portion 12. That is, the vertical position of the target portion 23 and the vertical position of the contact portion 24 are substantially the same.

  As shown in FIGS. 4 and 5, in the arm 21, the length from the target portion 23 to the bearing portion 22 may be the same as the length from the bearing portion 22 to the contact portion 24. The ratio from the length from the bearing portion 22 to the length from the bearing portion 22 to the contact portion 24 can be any one of 0.25 to 4. That is, in the lever 11, the ratio between the length from the force point to the fulcrum and the length from the fulcrum to the action point can be any of 0.25 to 4.

  Further, the upper surface of the portion where the lever is provided can be recessed downward with respect to the upper surface of the force point portion and the upper surface of the action point portion. FIG. 6 is an enlarged side view showing the configuration of the lever 101 and the holding unit 12 in the position detection device 1 of another embodiment in this case. In the case shown in FIG. 6, the same parts as those shown in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  The lever 101 is a lever as a machine element that is a simple machine. The lever 101 is configured to be swingable. The lever 101 is configured to support the arm 121 so as to be swingable at a fulcrum. On the lower surface of the arm 121 of the lever 101, a bearing portion (not shown) is formed which protrudes in a cylindrical shape and has a cylindrical hole formed therein. A shaft 31 is inserted into the hole of the bearing portion of the lever 101.

  Of the upper surface of the arm 121, the upper surface of the part where the fulcrum of the lever 101 is provided is recessed downward with respect to the upper surface of the force point part and the upper surface of the action point part.

  A disc-shaped target portion 123 having a smooth upper surface is formed at one end of the upper surface of the arm 121, for example, the right end. The target portion 123 is a portion that becomes a target for bringing the blade edge 3 of the blade 2 attached to the cutting apparatus into contact with the lever 101. That is, the target portion 123 is provided at the power point of the lever 101 with which the blade edge 3 of the blade 2 is brought into contact.

  Further, a disc-shaped contact portion 124 having a smooth upper surface is formed at the other end of the upper surface of the arm 121, for example, the left end. The contact part 124 is a part that is a target for contacting the measuring element of the lever type dial gauge 13. That is, the contact portion 124 is provided at the point of action of the lever 101 where the displacement is measured when the cutting edge 3 of the blade 2 touches the force point.

  When the upper end of the bolt 41 of the holding unit 12 contacts the back surface of the contact unit 124 of the arm 121, the vertical position of the upper surface of the target unit 123 is held.

  Thus, in the arm 121, the upper surface of the part where the fulcrum of the lever 101 is provided is recessed downward with respect to the upper surface of the force point part and the upper surface of the action point part.

  In the arm 21, when the position of the cutting edge 3 of the blade 2 is detected by increasing the length from the target portion 23 to the bearing portion 22 relative to the length from the bearing portion 22 to the contact portion 24. The force applied to the blade edge 3 can be further reduced. Further, by using a so-called low pressure gauge in which the contact moves with a smaller force as the lever type dial gauge 13, the force applied to the blade edge 3 when detecting the position of the blade edge 3 of the blade 2 can be further reduced. . Furthermore, the rod extending from the main body of the lever-type dial gauge 13 and having the probe provided at the tip opposite to the main body is made longer to move the contact with a smaller force. be able to. In this case, the force applied to the blade edge 3 when detecting the position of the blade edge 3 of the blade 2 can be further reduced.

  As described above, the vertical positions of the force point and the action point of the lever 11 are substantially the same. When the cutting edge 2 of the cutting tool 2 mounted on the cutting apparatus touches the power point from the upper side to the lower side to detect the position in the vertical direction, the power point and the working point of the lever 11 in the vertical direction The position is displaced in the vertical direction.

  The holding part 12 maintains the vertical position of the power point of the lever 11 when the cutting edge 3 of the blade 2 is not touching the power point of the lever 11. The lever type dial gauge 13 detects the displacement of the position of the lever 11 in the vertical direction. The height adjustment mechanism 14 adjusts the vertical position of the lever type dial gauge 13 with respect to the vertical position of the lever 11.

  That is, the position detection device 1 is a blade 2 mounted on a cutting device, and when the cutting edge 3 of the blade 2 to be detected in the vertical direction touches the power point from the upper side downward, the vertical direction is detected. When the lever 11 where the position of the force point and the position of the action point that are substantially the same are displaced in the vertical direction and the cutting edge 3 of the blade 2 are not touched by the force point of the lever 11, the force point of the lever 11 in the vertical direction A holding part 12 that keeps the position of the lever 11, a lever type dial gauge 13 that detects the displacement of the working point of the lever 11 in the vertical direction, and the vertical position of the lever type dial gauge 13 relative to the vertical position of the lever 11. And a height adjusting mechanism 14 to be adjusted.

  A lever-type dial in which the position of the force point of the lever 11 in which the position of the force point and the position of the action point in the vertical direction are substantially the same is maintained, and the position of the lever 11 in the vertical direction is adjusted with respect to the position of the lever 11 in the vertical direction The gauge 13 detects the displacement of the position of the lever 11 in the vertical direction. Since the position of the force point of the lever 11 and the position in the vertical direction of the action point are substantially the same, it becomes easier to balance the weight of the lever 11, and even if the force when the cutting edge 3 of the blade 2 touches is smaller, Since the position of the action point is displaced in the vertical direction, the position of the blade edge 3 of the blade 2 can be detected more reliably.

  In addition, since the position of the force point of the lever 11 and the position of the action point in the vertical direction are substantially the same, when trying to touch the force point downward from above with the cutting edge 3 of the cutter 2 mounted on the cutting apparatus. By referring to the position of the force point of the lever 11 and the position of the action point, the force point of the lever 11 can be easily aimed.

  Since the position of the force point of the lever 11 in the vertical direction is maintained by the holding unit 12, the position of the cutting edge 3 of the blade 2 can be detected more accurately. Furthermore, since the vertical position of the lever type dial gauge 13 with respect to the vertical position of the lever 11 is adjusted by the height adjusting mechanism 14, when the cutting edge 3 of the blade 2 is not touching the force point of the lever 11, When the measured value of the lever type dial gauge 13 is given an offset so as to indicate a value of, for example, 10 μm to 100 μm, the dead zone of the initial movement is further reduced, and the cutting edge 3 of the blade 2 touches the force point. The position of the blade edge 3 of the blade 2 can be detected more reliably. Further, when the cutting edge 3 of the blade 2 is in contact with the force point of the lever 11 and the force point is being pushed by the blade edge 3, the display of the lever type dial gauge 13 is changed, so that the blade edge 3 starts to contact the force point of the lever 11. The position of the blade edge 3 can be easily confirmed, and the position of the blade edge 3 of the blade 2 can be detected more accurately, more reliably, and more easily.

  Furthermore, since the lever type dial gauge 13 detects the displacement of the position of the action point, the main body of the lever type dial gauge 13 can be arranged to escape from the lever 11, and the blade mounted on the cutting apparatus. When trying to touch the force point from the upper side to the lower side with the blade edge 3 of 2, the lever type dial gauge 13 does not get in the way, the contact of the blade edge 3 with the lever type dial gauge 13 can be avoided, and the thinner blade 2 The position of the blade edge 3 of the blade 2 can be detected more easily with less damage. As described above, it is possible to detect the position of the blade edge 3 of the blade 2 more accurately, more reliably, and more easily with less damage to the thinner blade 2.

  The arm 21 of the lever 11 can be flat. When it is easy to visually confirm the position of the arm 21 and the position of the vertical force point and the position of the action point, and when trying to touch the force point downward from above with the cutting edge 3 of the cutter 2 mounted on the cutting device, It becomes easy to aim at the power point, the contact of the blade edge 3 with the lever type dial gauge 13 can be avoided, and the position of the blade edge 3 of the blade 2 can be detected more accurately, more reliably and more easily.

  The upper surface of the part where the fulcrum of the lever 101 is provided can be recessed downward with respect to the upper surface of the force point part and the upper surface of the action point part. When trying to touch the force point from the upper side downward with the cutting edge 3 of the cutting tool 2 mounted on the cutting device, it is possible to prevent the cutting edge 3 from being accidentally brought into contact with the vicinity of the fulcrum, and damage to the thinner cutting tool 2 Can be reduced.

  The length from the target portion 23 to the contact portion 24 can be 20 mm to 40 mm. That is, the length of the arm 21 can be approximately 20 mm to 40 mm. Since the lever 11 can be moved with a smaller force while making it easy to visually check the lever 11, damage to the thinner blade 2 can be reduced.

  The lever 11 can be provided with a target portion 23 as a target for touching the blade edge 3 of the blade 2. It becomes easier to confirm the position of the force point, and when trying to touch the force point from the upper side downward with the cutting edge 3 of the cutting tool 2 attached to the cutting device, it becomes easier to aim at the force point and contact other parts. The blade 2 can be prevented from being damaged, and the position of the blade edge 3 of the blade 2 can be detected more accurately, more reliably, and more easily.

  The lever 11 can be provided with a contact portion 24 for the probe of the lever type dial gauge 13 to touch. It becomes easier to confirm the position of the action point, and when the cutting edge 3 of the blade 2 is not touching the leverage point, an offset is given so that the measured value of the lever type dial gauge 13 indicates a value of 10 μm to 100 μm, for example. When the cutting edge 3 of the blade 2 touches the power point with a smaller initial dead zone, the position of the cutting edge 3 of the blade 2 can be detected more reliably.

  In addition, the lever type dial gauge 13 may be configured to electrically measure and output an electric signal indicating a measurement result to the outside. That is, the lever type dial gauge 13 can output an electric signal indicating a result of detecting the displacement to the outside. By doing in this way, the cutting device with which the position detection apparatus 1 is mounted | worn acquires this electrical signal, can prevent a reading mistake and an instruction mistake by a user, and can perform tool length correction | amendment more easily. The position of the blade edge 3 of the blade 2 can be detected more accurately, more reliably, and more easily.

  Although the position detection device 1 has been described as including the lever 11, the holding unit 12, the lever type dial gauge 13, the height adjusting mechanism 14, the lever table 15, the gauge table 16, and the base 17, the lever 11 and the holding unit 12 are provided. In addition, it can be configured as a jig including the height adjusting mechanism 14, the lever base 15, the gauge base 16, and the base 17. That is, the lever 11, the holding portion 12, the height adjustment mechanism 14, the lever base 15, the gauge base 16, and the base 17 can be provided on a jig for mounting the lever type dial gauge 13.

  The jig is a cutter 2 that is equipped with a lever-type dial gauge 13 and is mounted on a cutting apparatus, and is used to detect the vertical position of the cutting edge 3 of the blade 2 to be detected in the vertical direction. A jig for causing the dial gauge 13 to detect that when the cutting edge 3 of the blade 2 touches the force point from the upper side downward, the position of the force point and the position of the action point where the vertical positions are substantially the same When the lever 11 that is displaced in the vertical direction and the cutting edge 3 of the blade 2 are not touched by the force point of the lever 11, the holding part 12 that keeps the position of the force point of the lever 11 in the vertical direction, and the vertical direction of the operating point of the lever 11 A lever type dial gauge 13 for detecting the displacement of the lever position is mounted, and a height adjusting mechanism 14 for adjusting the vertical position of the lever type dial gauge 13 with respect to the vertical position of the lever 11 is provided.

  In this jig, the position of the force point and the position of the action point in the vertical direction are substantially the same, and the position of the force point of the lever 11 in the vertical direction is maintained, and the lever type dial attached to the height adjusting mechanism 14 is used. The displacement of the vertical position of the action point of the lever 11 is detected by the lever type dial gauge 13 which is the gauge 13 and whose vertical position is adjusted with respect to the vertical position of the lever 11. Since the position of the force point of the lever 11 and the position in the vertical direction of the action point are substantially the same, it becomes easier to balance the weight of the lever 11, and even if the force when the cutting edge 3 of the blade 2 touches is smaller, Since the position of the action point is displaced in the vertical direction, the position of the cutting edge 3 of the blade 2 can be detected more reliably. In addition, since the position of the force point of the lever 11 and the position of the action point in the vertical direction are substantially the same, when trying to touch the force point downward from above with the cutting edge 3 of the cutter 2 mounted on the cutting apparatus. By referring to the position of the force point of the lever 11 and the position of the action point, the force point of the lever 11 can be easily aimed.

  Since the position of the force point of the lever 11 is maintained in the vertical direction by the holding portion 12, the position of the cutting edge 3 of the blade 2 can be more accurately determined by the lever type dial gauge 13 attached to the height adjusting mechanism 14. Can be detected. Furthermore, since the vertical position of the lever type dial gauge 13 with respect to the vertical position of the lever 11 is adjusted by the height adjusting mechanism 14, when the cutting edge 3 of the blade 2 is not touching the force point of the lever 11, By giving an offset so that the measured value of the lever type dial gauge 13 indicates a value of, for example, 10 μm to 100 μm, the dead zone of the initial movement is further reduced, and the blade tip 3 of the blade 2 is more reliable when it touches the power point. In addition, the position of the blade edge 3 of the blade 2 can be detected. When the cutting edge 3 of the blade 2 is in contact with the force point of the lever 11 and the force point is being pushed by the blade edge 3, the display of the lever type dial gauge 13 is changed, so that the blade edge 3 starts to contact the force point of the lever 11. The position of the cutting edge 3 of the blade 2 can be detected more accurately, more reliably, and more easily.

  Furthermore, since the lever type dial gauge 13 mounted on the height adjusting mechanism 14 detects the displacement of the position of the action point, the main body of the lever type dial gauge 13 can be disposed away from the lever 11. When the blade tip 3 of the cutting tool 2 mounted on the cutting device tries to touch the force point downward from above, the lever type dial gauge 13 does not get in the way, and the blade tip 3 contacts the lever type dial gauge 13. The position of the blade edge 3 of the blade 2 can be detected more easily with less damage to the thinner blade 2 and less damage. In this manner, the position of the blade edge 3 of the blade 2 can be detected more accurately, more reliably, and more easily with less damage to the thinner blade 2.

  The embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Position detection device, 2 Cutting tool, 3 Cutting edge, 11 Lever, 12 Holding part, 13 Lever type dial gauge, 14 Height adjustment mechanism, 15 Lever, 16 Gauge stand, 17 Base, 21 Arm, 22 Bearing part, 23 Target Part, 24 contact part, 31 axis, 32 axis fixed part, 41 bolt, 42 nut, 101 lever, 121 arm, 123 target part, 124 contact part

Claims (8)

When the cutting edge of the cutting tool mounted on the cutting apparatus touches the power point from the upper side to the lower side, the position in the vertical direction is substantially the same. The position and the position of the action point are displaced in the vertical direction,
When the cutting edge of the blade is not touching the force point of the lever, holding means for keeping the position of the force point in the vertical direction;
A lever-type dial gauge that detects a displacement in a vertical position of the action point of the lever;
An adjustment mechanism that adjusts the vertical position of the lever-type dial gauge with respect to the vertical position of the lever. The position detection device according to claim 1,
The lever arm has a flat plate shape. The position detection device according to claim 1,
The position detection device, wherein an upper surface of a portion where the lever is provided is recessed downward with respect to an upper surface of the force point portion and an upper surface of the action point portion. The position detection device according to claim 1,
The length from the said power point of the said lever to the said action point is 20 mm thru | or 40 mm. Position detection apparatus. The position detection device according to claim 1,
A position detection device in which the lever is provided with a target portion that is a target for touching the blade edge of the blade. The position detection device according to claim 1,
A position detecting device, wherein the lever is provided with a contact portion for contact with a measuring element of the lever type dial gauge. The position detection device according to claim 1,
The lever type dial gauge outputs an electrical signal indicating a result of detecting displacement to the outside. A blade that is equipped with a lever type dial gauge and is mounted on a cutting apparatus, and is used for detecting the vertical position of the cutting edge of the blade to be detected in the vertical direction. In the jig,
When the cutting edge of the cutter touches the force point downward from the upper side, the position of the force point and the position of the action point that are substantially the same in the vertical direction are displaced in the vertical direction;
When the cutting edge of the blade is not touching the force point of the lever, holding means for keeping the position of the force point in the vertical direction;
An adjustment mechanism that is mounted with the lever type dial gauge that detects the displacement of the position of the lever in the vertical direction, and that adjusts the vertical position of the lever type dial gauge with respect to the position of the lever in the vertical direction; A jig to be provided.