JP2011143515A - Polishing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polishing device which easily adjusts an amount of rotation in an automatically rotating rotary cutter. <P>SOLUTION: In the polishing device, with respect to a cutter holding part 2 comprising a holding stand 21 holding the rotary cutter 4 by allowing it to horizontally rotate only in one direction, an approaching/separating mechanism 6 is constituted, in which the holding stand 21 horizontally approaches/separates to/from a grinder support part 3 so that the rotary cutter 4 approaches to/separates from a horizontal direction toward a grinding wheel 51 of a grinder 5 supported by the grinder support part 3 with its attitude fixed, and a ratchet lever 7 hooking a ratchet pin 72 on the blade 41 of the rotary cutter 4 and an electric motor 12 are disposed on a base. In the approaching/separating mechanism 6, an output rod 61 extending from a crank 121 of the electric motor 12 and an input rod 63 extending from the holding stand 21, are connected with an intermediate lever 62 capable of rocking around a rocking shaft 621 provided on the base 1 and adjusting a pivotally attached position of the rocking shaft 621. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a polishing apparatus for a rotary cutter.

  When grinding each blade of a rotary cutter (chip saw or circular saw blade) used in a mowing machine or the like, for example, a grinder (polishing tool) provided with a disk-shaped grinding wheel is used. However, it is difficult for an operator to hold the grinder in his / her hand and polish each blade correctly, and it is necessary for the operator to be skilled in polishing work using the grinder in order to achieve good polishing. In view of this, various polishing apparatuses that hold or support the rotary cutter and the grinder and allow one to approach and separate from the other have been proposed (Patent Documents 1 to 5). By using such a polishing apparatus, each blade of the rotary cutter can be accurately and satisfactorily polished without being an expert.

  Although the details of the polishing apparatus are different from each other, each cutter blade of the rotating cutter is provided by providing a cutter holding part for holding the rotating cutter and a grinder supporting part for supporting the grinder on the base, and moving one of them closer to and away from the other. A grinder grinding wheel is applied to. That is, in order to polish each blade of the rotary cutter accurately and satisfactorily, the cutter is held or supported by the cutter holder and the grinder support so that the positional relationship between the rotary cutter and the grinding wheel of the grinder is not shifted. However, in order to apply the grinder to each blade of the rotary cutter, the operator only operates the cutter holding part or the grinder support part.

  There is also a polishing apparatus that is manually operated until the blades applied to the grinding wheel of the grinder are changed in order. As seen in, for example, Patent Document 4, the cutter holding part is pivotally attached to a base provided with a cutter holding part. A ratchet lever that engages a ratchet pin (corresponding to a ratchet pawl) on the blade of the rotary cutter held by the blade, and rotates the rotary cutter by one blade or two blades each time the cutter holder approaches the grinder support. There is also a polishing device. Thus, for example, the operator can automatically move the cutter to one or two blades only by repeating the operation of bringing the cutter holder close to and away from the grinder support and applying the blade of the rotary cutter to the grinding wheel of the grinder. It can be rotated one by one.

Japanese Patent No. 3692338 JP 2001-252852 JP Utility Model Registration No.2539682 JP 2001-347442 A Registered Utility Model No. 3001786

  The conventional polishing apparatus enables each blade of the rotary cutter to be accurately and satisfactorily polished even by an unskilled person, and by using a ratchet mechanism, the rotary cutter is divided into one blade or two blades. It can be rotated, realizing considerable labor saving. However, since the operator moves the cutter holding portion closer to and away from the grinder support portion, the above-described operation is required for the number of blades. Strictly speaking, it is necessary to apply the blade to the grinder twice to three times because sufficient polishing cannot be performed by simply applying the blade to the grinding wheel of the grinder once. For this reason, the work of moving the cutter holding part closer to and away from the grinder support part is two to three times the number of blades, and the labor burden of the operator cannot be ignored.

  For example, in the case of a polishing apparatus that brings the cutter holder close to the grinder support, it is relatively easy to automate the approach and separation of the cutter holder, but due to differences in the outer diameter of the rotating cutter and the number of blades, It is necessary to adjust the amount of rotation of the rotary cutter by the ratchet mechanism to one blade or two blades by adjusting the approach / separation amount, and how to achieve the adjustment becomes a problem. In this regard, for example, a configuration is conceivable in which the driving means for moving the cutter holding portion toward and away from the grinder support portion is electrically controlled, and the amount of movement of the cutter holding portion by the driving means is changed for each rotating cutter. However, such electrical control only increases the polishing apparatus, and the cost effectiveness is significantly reduced as compared with the conventional polishing apparatus used only by the operation by the operator.

  In the above-described exemplary polishing apparatus (polishing apparatus that brings the cutter holding portion closer to the grinder support portion), an electric motor has the advantage that it is most easily available as a drive unit that automates the approach and separation of the cutter holding portion. However, since the motion for bringing the cutter holding portion closer to the grinder support portion is an arc motion or a linear motion in a horizontal plane, it is necessary to convert and transmit the rotational motion output by the electric motor. Therefore, in the process of transmitting the rotational movement from the electric motor to the cutter holding part or grinder support part while converting the movement, the approach and separation amount of the cutter holding part is adjusted depending on the outer diameter of the rotating cutter and the number of blades, thereby the ratchet mechanism. In order to develop a power transmission mechanism that can adjust the rotation amount of the rotary cutter to one blade or two blades.

  What has been developed as a result of the study is a polishing machine with a cutter holder and a grinder support on the base, and a cutter holder that consists of a holder that holds the rotating cutter horizontally and only in one direction. The gripper support part is configured to move toward and away from the grinder grinding wheel of the grinder supported in a fixed posture. A ratchet lever for engaging a ratchet pin with a cutter blade and a rotational drive source are arranged on the base, and the approach / separation mechanism is provided with an output rod extending from the crank of the rotational drive source and an input rod extending from the holding base on the base. The polishing apparatus is connected by an intermediate lever that is swingable about the swinging shaft and adjustable in the position of the swinging shaft.

  The polishing apparatus according to the present invention adjusts the shaft attachment position of the swing shaft in the intermediate lever of the approach / separation mechanism that transmits the rotational motion output from the rotational drive source while converting the motion, thereby the shaft of the output rod relative to the intermediate lever. By changing the ratio of the rocking radius of the shaft attachment part of the output rod and the rocking radius of the shaft attachment part of the input rod by increasing / decreasing the rocking radius of the landing part, the advance / retreat amount of the input rod is greatly increased / decreased Then, the rotation amount of the rotary cutter by the ratchet mechanism is largely adjusted.

  For the rotation of the rotary cutter, for example, a ratchet mechanism disclosed in Patent Document 4 can be used. The rotary cutter is held on a holding table with the antinodes of the blades in the permitted rotation direction and the backs of the blades in the unrotated rotation direction, and the ratchet pins are engaged with the backs of the blades. As a result, when the holding base moves closer to and away from the grinder support, the engagement relationship of the ratchet pin with the rotating cutter changes, and when the ratchet pin presses the back of the blade, the rotating cutter rotates and the blade belly ratchet When the pin is pushed, the ratchet pin gets over the blade, and the rotary cutter rotates by the number of blades that the ratchet pin gets over. From this, the number of blades that the ratchet pin rides can be adjusted by adjusting the advance / retreat amount of the input rod.

  The approaching / separating mechanism connects an output rod extending from the crank of the rotational drive source and an input rod extending from the holding base via an intermediate lever. When adjusting the amount of advancement / retraction of the input rod with respect to the rotational motion, it is conceivable to directly attach the input rod to the crank and adjust the axial attachment position. In this case, if the radius of the crank is not large, the input rod The amount of advance or retreat cannot be adjusted greatly. On the other hand, as in the present invention, when the pivoting position of the pivot shaft of the intermediate lever that pivotally mounts the output rod and input rod is adjusted, the ratio of the pivot radius of the both changes greatly, resulting in an adjustment width being reduced. Can be big. As a result, the polishing apparatus of the present invention can cope with the amount of rotation of one blade or two blades, which varies greatly depending on the size (radius) of the rotating cutter, the number of blades, and the shape of the blades.

  The holding base of the polishing apparatus that approaches and separates from the grinder support is (1) pivotally mounted on a pivot shaft provided on the upper surface of the base, and the approach / separation mechanism pushes and pulls the input rod to center the pivot shaft. A structure that moves toward and away from the grinder support portion by horizontal turning, or (2) is engaged with a linear groove provided on the upper surface of the base, and the approach and separation mechanism pushes and pulls the input rod along the linear groove. It is configured to move toward and away from the grinder support by the linear motion. The holding table is preferably configured to approach and separate from the grinder support portion by linear motion along the linear groove so that the blade can be applied from the orthogonal direction to the grinding wheel of the grinder. Since it is costly to implement and maintain, it may be configured to approach and separate from the grinder support portion by horizontal turning.

  If the approach / separation mechanism of the present invention is used, in the polishing apparatus provided with the cutter holding part and the grinder support part on the base, the cutter holding part is provided with respect to the grinder support part constituted by a support base that supports the grinder in a fixed posture. Construct and rotate an approach / separation mechanism that moves the support base toward and away from the cutter holder horizontally so that the grinding wheel of the grinder approaches and separates from the horizontal direction toward the rotary cutter that is held horizontally and rotatable only in one direction. The ratchet lever that engages the ratchet pin with the cutter blade is disposed on the support base, the rotational drive source is disposed on the base, and the approach / separation mechanism includes an output rod extending from the crank of the rotational drive source and an input rod extending from the support base. A polishing device connected by an intermediate lever that is swingable about a swing shaft provided on a base and that can adjust the position of the swing shaft. And it can also be.

  The polishing apparatus in which the support base moves closer to and away from the cutter holding portion only needs to make the grinding wheel of the grinder and the rotary cutter relatively close to and away from each other. On the other hand, the relationship between the grinder support portion and the cutter holding portion is reversed. The configuration in which the ratchet pin is engaged with the blade and the rotating cutter is rotated is the same in the polishing apparatus in which the holding base approaches and separates from the grinder support part and the polishing apparatus in which the support base approaches and separates from the cutter holding part. Since the rotating cutter is fixed in position in a polishing machine in which the support base approaches and separates from the part, the ratchet lever provided with the ratchet pin is pivotally attached to the support base, and the ratchet pin pushes against the position-fixed rotating cutter. It is different in that it is drawn.

  The polishing device support that approaches and separates from the cutter holder is (1) pivotally attached to a pivot shaft provided on the upper surface of the base, and the approach / separation mechanism pushes and pulls the input rod to center the pivot shaft. The structure which approaches and separates toward the cutter holding part by horizontal turning as described above, or (2) is engaged with a linear groove provided on the upper surface of the base, and the approaching and separating mechanism pushes and pulls the input rod along the linear groove. It is configured to move toward and away from the cutter holder by a linear motion. As described above, it is preferable that the support base be moved toward and away from the cutter holding portion by a linear motion along the linear groove so that the blade can be applied to the grinding wheel of the grinder from an orthogonal direction. Since it is costly to realize and maintain the motion, it may be simply configured to approach and separate from the cutter holding portion by horizontal turning.

  The polishing apparatus of the present invention adjusts the amount of advancement / retraction of the input rod by an approach / separation mechanism that advances / retreats the input rod by receiving rotational power from a rotational drive source, regardless of the size (radius), the number of blades, and the shape of the blades. It is possible to automatically polish various rotating cutters while automatically rotating one blade or two blades at a time. Thus, even when a rotating cutter having a very large number of blades is polished, it is possible to omit the labor burden on the operator due to the operation of moving the cutter holding portion closer to and away from the grinder support portion. In addition, the polishing apparatus of the present invention can be used for polishing operations of various rotary cutters as compared with the prior art. As described above, the polishing apparatus of the present invention realizes a significant labor saving by automating the polishing of the rotary cutter, which has been a manual work in the past, in various rotary cutters.

It is a perspective view of the 1st grinding | polishing apparatus with which a holding stand approaches and leaves | separates by horizontal turning with respect to a grinder support part. It is a left view of the 1st grinding | polishing apparatus with which a holding stand approaches and leaves | separates by horizontal turning with respect to a grinder support part. It is a top view of the 1st grinding | polishing apparatus with which a holding stand approaches and leaves | separates by horizontal turning with respect to a grinder support part. It is a front view of the 1st grinding | polishing apparatus with which a holding stand approaches and leaves | separates with respect to a grinder support part by horizontal turning. FIG. 4 is a plan view corresponding to FIG. 3 showing the first polishing apparatus in a state where a blade of a rotary cutter is applied to a grinding wheel of a grinder. FIG. 5 is a front view corresponding to FIG. 4 showing the first polishing apparatus in a state where a blade of a rotary cutter is applied to a grinding wheel of a grinder. It is an enlarged view showing the approaching / separating mechanism in a state where the swing shaft of the intermediate lever is lowered. It is an enlarged view showing the approaching / separating mechanism in a state where the swing shaft of the intermediate lever is raised. FIG. 4 is a plan view corresponding to FIG. 3 of a second polishing apparatus in which a holding base approaches and separates by a linear motion with respect to a grinder support part. FIG. 5 is a front view corresponding to FIG. 4 of a second polishing apparatus in which a holding base approaches and separates by a linear motion with respect to a grinder support portion. FIG. 10 is a plan view corresponding to FIG. 9 showing the second polishing apparatus in a state where the blade of the rotary cutter is applied to the grinding wheel of the grinder. FIG. 11 is a front view corresponding to FIG. 10 showing a second polishing apparatus in a state where a blade of a rotary cutter is applied to a grinding wheel of a grinder. It is a top view equivalent to FIG. 3 of the 3rd grinding | polishing apparatus with which a support stand approaches / separates by a horizontal turning with respect to a cutter holding part. FIG. 5 is a front view corresponding to FIG. 4 of a third polishing apparatus in which a support base approaches and separates from a cutter holding portion by horizontal turning. FIG. 14 is a plan view corresponding to FIG. 13 showing a third polishing apparatus in a state where a blade of a rotary cutter is applied to a grinding wheel of a grinder. FIG. 15 is a front view corresponding to FIG. 14 showing a third polishing apparatus in a state where a blade of a rotary cutter is applied to a grinding wheel of a grinder. FIG. 6 is a plan view corresponding to FIG. 3 of a fourth polishing apparatus in which a support base moves closer to and away from the cutter holding portion by linear motion. FIG. 5 is a front view corresponding to FIG. 4 of a fourth polishing apparatus in which a support base moves closer to and away from the cutter holding portion by linear motion. FIG. 18 is a plan view corresponding to FIG. 17 showing a fourth polishing apparatus in a state where a blade of a rotary cutter is applied to a grinding wheel of a grinder. FIG. 19 is a front view corresponding to FIG. 18 showing a fourth polishing apparatus in a state where a blade of a rotary cutter is applied to a grinding wheel of a grinder.

  Hereinafter, modes for carrying out the present invention will be described. As shown in FIGS. 1 to 4, the first polishing apparatus to which the present invention is applied is configured by providing the base 1 with a cutter holding portion 2 and a grinder support portion 3, and constituting the cutter holding portion 2. As the table 21 rotates horizontally and approaches and separates from the grinder support 3, the blade 41 of the rotary cutter 4 is applied to the grinding wheel 51 of the grinder 5 for grinding as shown in FIGS. 5 and 6. The present invention is provided with an approach / separation mechanism 6 that automates the approach / separation of the blade 41 of the rotary cutter 4 to the grinding wheel 51 of the grinder 5, and as shown in FIGS. 7 and 8, the intermediate lever 62 of the approach / separation mechanism 6 is provided. It is characterized in that the approaching / separating amount is adjusted by adjusting the position of the pivot shaft 621 at the center.

  The base 1 is formed by bending a metal plate into a U-shaped cross section to form installation legs 11 and 11, a cutter holding portion 2 and a grinder support portion 3 are provided on the front surface (upper surface) side, and a flange provided on the rear surface side is rotated. An electric motor 12 serving as a drive source is supported. The base 1 of this example has a configuration in which the installation leg 11 is formed by bending a metal plate material in order to simplify the device configuration as much as possible. However, the base 1 has a casing structure surrounding the electric motor 12 supported on the back side. Also good. Further, in order to align the swing shaft 621 of the intermediate lever 62 with the base surface, the electric motor 12 is supported on the back surface side with respect to the surface side on which the cutter holding portion 2 and the grinder support portion 3 are provided. The electric motor 12 may be supported on the surface side of the base 1 as long as the connection relationship between the swing shaft 621 of 62 and the output rod 61 and input rod 63 can be satisfied.

  The cutter holding part 2 bends a metal plate material into a U-shaped cross section, and a lower end side horizontal surface is attached to the base 1 by a turning shaft 212, and a rotary cutter 4 is attached to a rotary cutter mounting shaft 211 provided on the upper end side horizontal surface. It is composed of a holding base 21 to be mounted. The rotary cutter mounting shaft 21 has a structure in which the rotary cutter 4 is pressed against the horizontal surface on the upper end side and does not rotate unless a certain pressure is applied or a one-way clutch is incorporated. In the holding base 21, an input rod end 632 of the input rod 63 is connected to a connecting flange 214 that protrudes horizontally from the middle of the vertical surface. As a result, the holding base 21 receives the advancing / retreating motion of the input rod 63 due to the swinging of the intermediate lever 62, and rotates horizontally around the rotation axis 212. Although the holding base 21 of this example is only restrained by the turning shaft 212, for example, an arc groove may be formed around the turning axis 212, and a guide protrusion protruding from the holding base 21 may be engaged with the arc groove. Good.

  In the holding table 21 of this example, the rotary cutter mounting shaft 211 and the input rod end 632 of the input rod 63 are in a point-symmetric horizontal positional relationship with the pivot shaft 212 interposed therebetween, so that the forward and backward movements of both are reversed. That is, when the input rod 63 pushes the connecting flange 214, the rotary cutter mounting shaft 211 moves backward to move the rotary cutter 4 away from the grinder 5 (see FIGS. 3 and 4), and when the input rod 63 pulls the connecting flange 214, the rotary cutter is rotated. The mounting shaft 211 advances and the rotary cutter 4 approaches the grinder 5 (see FIGS. 5 and 6). Although illustration is omitted, if the horizontal positional relationship between the pivot shaft 212, the rotary cutter mounting shaft 211, and the input rod end 632 is adjusted, the input rod 63 pushes the connecting flange 214 to bring the rotary cutter 4 closer to the grinder 5, and the input rod 63 can pull the connecting flange 214 to move the rotary cutter 4 away from the grinder 5.

  The grinder support portion 3 includes a support base 31 in which a grinder fixing frame 311 is provided on a metal plate fixed on the front surface side of the base 1, and the grinder 5 is fixed to the grinder fixing frame 311. As described above, in the first polishing apparatus (see FIGS. 1 to 6), the rotating cutter 4 of the cutter holding unit 2 approaches and separates from the grinder 5, so that the configuration of the grinder support unit 3 can be extremely simplified. In addition, since the blade 41 of the rotary cutter 4 is pressed against the grinding wheel 51 that rotates at a high speed, the position of the grinding wheel 51 is firmly fixed with respect to the grinder support 3 that has been fixed in position. It is preferable from the viewpoint of stability, since the grinder 5 does not rattle.

  The rotating cutter 4 held by the cutter holding unit 2 approaches the grinder support unit 3 as the holding table 21 pushed and pulled by the input rod 63 of the approaching / separating mechanism 6 horizontally turns around the turning shaft 212 (see FIG. 5 and FIG. 6) or separated (see FIG. 3 and FIG. 4) and rotated by two blades by the ratchet mechanism at the time of approaching and separating. The ratchet mechanism of this example is configured by pivoting a ratchet lever 7 on the top of a ratchet support base 73 erected on the surface side of the base 1. The ratchet lever 7 has a ratchet pin 72 at the tip, and is urged in a direction in which the ratchet pin 72 is pressed against the rotary cutter 4 by a ratchet urging shaft 71 that is a shaft attachment portion with respect to the ratchet support base 73.

  The rotary cutter 4 is mounted on the rotary cutter mounting shaft 211 so as to be horizontally rotatable only in one direction, with the antinode of the blade 41 facing in the permitted rotational direction and the spine of the blade 41 facing away from the permitted rotational direction. A ratchet pin 72 of a ratchet lever 7 extending in a direction in which the holding base 21 moves away from the grinder support portion 3 is engaged with the back of the blade 41. As a result, when the holding table 21 approaches the grinder support 3, the ratchet pin 72 pushes the back of the blade 41 to rotate the rotating cutter 4, and when the holding table 21 moves away from the grinder support 3, Pushes the ratchet pin 72 over the blade 41. This means that when the holding base 21 approaches and separates once from the grinder support portion 3, the rotary cutter 4 rotates by the number of blades over which the ratchet pin 72 rides.

  The approaching / separating mechanism 6 includes an output rod 61 extending from a crank 121 attached to an output shaft of the electric motor 12 and an input rod 63 extending from a connecting flange 214 of the holding base 21, and a swing shaft of a bearing flange 64 projecting from the base 1. This is a power transmission mechanism configured to be connected via an intermediate lever 62 pivotally attached to 621. The output rod 61 has the output rod start end 611 attached to the crank 121 and the output rod end 612 attached to the lower side of the swing shaft 621 of the intermediate lever 62 so that the rotary motion of the electric motor 12 can be swung. Convert to dynamic motion. The input rod 63 has the input rod start end 631 mounted on the upper side of the swinging shaft 621 of the intermediate lever 62, and the input rod end 632 is mounted on the connecting flange 214 of the holding base 21, so that the swinging motion of the intermediate lever 62 is achieved. Is converted into a horizontal turning motion of the holding table 21. When the holding base 21 is turned horizontally, the position where the input rod end 632 is attached to the connection flange 214 changes. Therefore, the input rod end 632 is attached to the connection flange 214 via a universal joint.

  The intermediate lever 62 is composed of a pair of metal plate members that are substantially triangular in a side view, and the swing shaft 621 is passed through the adjustment long hole 625 provided in each of the metal plate members, and the range of the adjustment long hole 625 Thus, the positional relationship of the swing shaft 621 can be changed. The intermediate lever 62 is screwed with an adjusting nut 623 on a swing screw 622 that is pivotally attached to the swing shaft 621, and the adjusting nut 623 is inserted into a nut engaging groove 624 provided perpendicular to the adjusting long hole 625. . As a result, when the screwing position of the adjustment nut 623 with respect to the rocking screw 622 is adjusted, the positional relationship of the rocking shaft 621 in the adjustment long hole 625 changes, and the shaft attachment position of the rocking shaft 621 with respect to the intermediate lever 62 is adjusted. it can.

  The approaching / separating mechanism 6 adjusts the pivoting position of the swing shaft 621 in the intermediate lever 62 as described above in the process of transmitting the rotational motion output from the electric motor 12 while converting the motion. 62, the swing radius of the output rod end 612 is increased or decreased, and the ratio between the swing radius of the output rod end 612 and the swing radius of the input rod start end 631 is changed to accurately move the input rod 63 forward and backward. Adjusts the advance / retreat amount of the input rod end 632. If the advance / retreat amount of the input rod 63 can be adjusted, the horizontal turning range (angle) of the holding base 21 can be increased / decreased, and the approach / separation amount with respect to the grinder support 3 can be adjusted, and the feed amount of the blade 41 of the rotary blade 4 by the ratchet mechanism Can be adjusted.

  For example, as shown in FIG. 7, if the adjustment nut 623 is screwed near the tip of the swing screw 622 to lower the pivoting position of the swing shaft 621, the swing radius Out1 of the output rod end 612 is reduced and the input The rocking radius In1 of the rod start end 631 can be increased to increase the advance / retreat amount of the input rod 63 (see the white arrow in FIG. 7). On the contrary, as shown in FIG. 8, if the adjustment nut 623 is screwed near the swinging shaft 621 of the swinging screw 622 to raise the pivoting position of the swinging shaft 621, the swing radius Out2 of the output rod end 612 is increased. Can be increased and the swing radius In2 of the input rod starting end 631 can be decreased to reduce the advance / retreat amount of the input rod 63 (see the white arrow in FIG. 8).

  In order to explain that the adjustment range of the advance / retreat amount of the input rod 63 is large, a simple numerical value different from the actual size ratio in the drawing is used for convenience. For example, the rocking radius Out1 of the output rod end 612: the rocking radius Out2 of the output rod end 612: input with respect to the advance / retreat amount of the input rod 63 at the rocking radius In1 of the input rod starting end 631 = 1: 2 (see FIG. 7) The advance / retreat amount of the input rod 63 at the rocking radius In2 = 2: 1 (see FIG. 8) of the rod start end 631 becomes 1/4 even if the output rod 61 advances / retreats. Since the swing radius In2 of the input rod start end 631 itself is half of the swing radius In1 of the input rod start end 631, the advance / retreat amount of the input rod 63 at the swing radius In2 is the input rod 63 at the swing radius In1. The amount of advance and retreat is 1/8.

  In this way, the approach / separation mechanism 6 increases the adjustment range of the advance / retreat amount of the input rod 63, and adjusts the amount of rotation of the rotary cutter 4 that rotates when the holding table 21 approaches / separates from the grinder support portion 3. This corresponds to the amount of rotation of the rotary cutter 4 that varies greatly depending on the size (radius) of the blade, the number of blades, and the shape of the blade 41. In order to set the rotation amount of the rotary cutter 4 strictly, it is desirable to adjust the advance / retreat amount of the input rod 63 by the approach / separation mechanism 6 strictly. However, since the rotation of the rotary cutter 4 is regulated by the ratchet mechanism, if the advance / retreat amount of the input rod 63 can be roughly adjusted, the rotary cutter 4 can be rotated by one blade or two blades.

  As shown in FIGS. 9 to 12, the approaching / separating mechanism 6 has a configuration in which the holding base 21 in which the guide protrusion 213 is engaged with the linear groove 13 formed in the base 1 is moved toward and away from the grinder support 3 by linear motion. You can also The second polishing apparatus (see FIGS. 9 to 12) has basically the same configuration as the first polishing apparatus (see FIGS. 1 to 8), but the connection flange 214 (see FIG. 1) is omitted in detail. The difference is that the input rod end 632 is connected to the top of the guide projection 213 protruding from the lower horizontal surface of the holding base 21 via a universal joint.

  Further, the point that the amount of rotation of the rotary cutter 4 can be adjusted by adjusting the advance / retreat amount of the input rod 63 by the approach / separation mechanism 6 is the same as the first polishing apparatus (see FIGS. 1 to 8). This polishing apparatus (see FIGS. 9 to 12) is different from the above example in that the advance / retreat of the input rod 63 is directly equal to the advance / retreat of the holding table 21. That is, when the input rod 63 moves forward, the holding table 21 moves forward and the rotary cutter 4 approaches the grinder 5 (see FIGS. 11 and 12), and when the input rod 63 moves backward, the holding table 21 also moves backward and the rotary cutter 4 moves to the grinder. Move away from 5 (see FIGS. 9 and 10). Similar to the first polishing apparatus (see FIGS. 1 to 8), the rotary cutter 4 rotates when the back of the blade 41 is pushed by the ratchet pin 72 when the holding table 21 approaches the grinder support 3.

  As shown in FIGS. 13 to 16, the approaching / separating mechanism 6 is arranged with respect to the grinder support part 3 and can be used for a configuration in which the support base 31 is moved close to and away from the rotary cutter holding base 2 by horizontal turning. The cutter holding unit 2 of the third polishing apparatus (see FIGS. 13 to 16) has a structure or a one-way clutch in which the rotary cutter mounting shaft 21 does not rotate unless the rotary cutter 4 is pressed against the horizontal surface of the upper end side and a certain pressure is applied. However, the difference is that the holding base 21 is fixed to the base 1 in the same manner as the first polishing apparatus (see FIGS. 1 to 8). That is, the third polishing apparatus causes the grinder 5 to approach (see FIGS. 15 and 16) or move away (see FIGS. 13 and 14) to the blade 41 of the rotary cutter 4 whose position is fixed, and the grinding wheel 51 is moved to the blade. Polish against 41.

  The grinder support portion 3 of the third polishing apparatus (see FIGS. 13 to 16) is composed of a support base 31 in which a grinder fixing frame 311 is provided on a metal plate material in a plan view of a home base, and is based on the metal plate material. 1 is attached to a rotating shaft 312. The input rod 63 has an input rod end 632 connected to the metal plate material via a universal joint. As a result, the support base 31 is transmitted with the advancing and retreating motion of the input rod 63 due to the swing of the intermediate lever 62, and horizontally swings around the swing axis 312. The support base 31 in this example is only restrained by the pivot axis 312. For example, an arc groove may be formed around the pivot axis 312 and a guide projection protruding from the support base 31 may be engaged with the arc groove. Good.

  Even if the rotary cutter 4 is fixed in position, it can rotate if the ratchet lever 7 moves back and forth relatively. Therefore, the ratchet support base 73 in the third polishing apparatus is erected on the support base 31 that approaches and separates from the cutter holding portion 2. The ratchet pin 72 urged by the ratchet urging shaft 71 can rotate horizontally only in one direction, and rotates with the antinode of the blade 41 in the permitted rotation direction and the back of the blade 41 in the unrotated rotation direction. The rotary cutter 4 mounted on the cutter mounting shaft 211 is engaged with the back of the blade 41. As a result, when the support base 31 approaches the cutter holding portion 2, the ratchet pin 72 pushes the back of the blade 41 to rotate the rotary cutter 4. When the support base 31 is separated from the cutter holding portion 2, the ratchet pin 72 is pushed by the antinode of the blade 41 and gets over, so that the rotary cutter 4 does not rotate by the backward movement of the support base 31.

  The third polishing apparatus (see FIGS. 13 to 16) adjusts the amount of advancement / retraction of the input rod 63 by the approach / separation mechanism 6, and adjusts the amount by which the ratchet pin 72 pushes the blade 41 of the rotary cutter 4. Adjust the amount of rotation of 4. That is, when the input rod 63 moves forward, the support base 31 turns horizontally and the ratchet lever 7 moves forward, and the ratchet pin 72 pushes the back of the blade 41 to rotate the rotary cutter 4 (see FIGS. 15 and 16). When 63 is retracted, the support 31 is pivoted horizontally, the ratchet lever 7 is retracted, and the ratchet pin 72 is engaged with the back of another blade 41 beyond the antinode of the blade 41 (see FIGS. 13 and 14). The amount of advancement / retraction of the input rod 63 increases or decreases the amount of rotation of the rotary cutter 4 by adjusting the amount by which the check pin 72 pushes the back of the blade 41.

  As shown in FIGS. 17 to 20, the fourth polishing apparatus has a support base in which a guide protrusion 313 is engaged with a linear groove 13 formed in the base 1 and a guide side plate 314 is engaged with a side edge of the base 1. In this configuration, 31 is moved toward and away from the cutter holder 2 by a linear motion by the approach and separation mechanism 6. The fourth polishing apparatus (see FIGS. 17 to 20) has basically the same configuration as the third polishing apparatus (see FIGS. 13 to 16), but protrudes from the metal plate constituting the support base 31. The difference is that the input rod end 632 is connected to the top of the guide protrusion 313 via a universal joint.

  In addition, the fourth polishing apparatus (see FIGS. 17 to 20) is also capable of adjusting the amount of rotation of the rotary cutter 4 by adjusting the advance / retreat amount of the input rod 63 by the approach / separation mechanism 6. 13 to 16), but the same as the second polishing apparatus (see FIGS. 8 to 12) in that the advance / retreat of the input rod 63 is the same as the advance / retreat of the support base 31 as it is. That is, when the input rod 63 moves forward, the support base 31 moves forward and the grinder 5 approaches the rotary cutter 4 (see FIGS. 19 and 20), and when the input rod 63 moves backward, the support base 31 also moves backward and the grinder 5 rotates. Move away from 4 (see FIGS. 17 and 18).

  Further, in the fourth polishing apparatus (see FIGS. 17 to 20), the ratchet mechanism that rotates the rotary cutter 4 by engaging the ratchet pin 72 with the blade 41 has the third polishing apparatus (see FIGS. 13 to 16). In the same manner, the ratchet support base 73 is erected on the support base 31 and the ratchet pin 72 urged by the ratchet urging shaft 71 is engaged with the back of the blade 41 of the rotary cutter 4 to the cutter holder 2. When the support base 31 approaches, the ratchet pin 72 pushes the back of the blade 41 to rotate the rotary cutter 4, and when the support base 31 moves away from the cutter holding portion 2, the antinode of the blade 41 pushes the ratchet pin 72 away. Get over the blade 41.

DESCRIPTION OF SYMBOLS 1 Base 2 Cutter holding part 3 Grinder support part 4 Rotation cutter 5 Grinder 6 Approaching / separating mechanism 7 Ratchet lever

Claims (6)

In a polishing apparatus provided with a cutter holding part and a grinder support part on the base,
The cutter comes close to the grinding wheel of the grinder that is supported by the grinder support in a fixed position, while the cutter holder is made up of a holder that holds the rotary cutter so that it can rotate horizontally only in one direction. An approaching / separating mechanism for moving the holding table toward and away from the grinder support part in the horizontal direction so as to be separated,
The ratchet lever that engages the ratchet pin with the blade of the rotary cutter and the rotation drive source are arranged on the base,
The approach / separation mechanism is
The output rod that extends from the crank of the rotation drive source and the input rod that extends from the holding base are connected by an intermediate lever that can swing around the swing shaft provided on the base and adjust the position of the swing shaft. A polishing apparatus characterized by that. The holding base is pivotally attached to a turning shaft provided on the upper surface of the base, and the approaching / separating mechanism pushes and pulls the input rod so that the holding stand approaches and separates toward the grinder support portion by horizontal turning around the turning shaft. Item 2. The polishing apparatus according to Item 1. The holding base is engaged with a linear groove provided on the upper surface of the base, and the approaching / separating mechanism pushes and pulls the input rod, thereby approaching / separating toward the grinder support portion by linear motion along the linear groove. The polishing apparatus as described. In a polishing apparatus provided with a cutter holding part and a grinder support part on the base,
The grinder grinding wheel is moved closer to and away from the horizontal direction with respect to the rotating cutter that the cutter holding part holds horizontally in only one direction with respect to the grinder support part constituted by a support base that supports the grinder in a fixed posture. As shown in FIG. 2, an approaching / separating mechanism for moving the support base toward and away from the cutter holding unit in the horizontal direction is configured.
The ratchet lever that engages the ratchet pin with the blade of the rotary cutter is placed on the support base, and the rotational drive source is placed on the base.
The approach / separation mechanism is
The output rod that extends from the crank of the rotational drive source and the input rod that extends from the support base are connected by an intermediate lever that can swing around the swing shaft provided on the base and that can adjust the mounting position of the swing shaft. A polishing apparatus characterized by that. The support base is pivotally attached to a turning shaft provided on the upper surface of the base, and the approaching / separating mechanism pushes and pulls the input rod so that the support base approaches and separates toward the cutter holding portion by horizontal turning around the turning shaft. Item 5. The polishing apparatus according to Item 4. 5. The support base is engaged with a linear groove provided on the upper surface of the base, and the approaching / separating mechanism pushes and pulls the input rod so that the support base approaches and separates toward the cutter holding portion by a linear motion along the linear groove. The polishing apparatus as described.

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