JP2016068240A - Cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting device 2 that cuts along a radial direction a tubular member (for instance an insulation coating 1b of an electric wire 1) made of a soft material to be cut, which makes a cut cross section straight and avoids generation of burrs when cutting a very soft tubular member (1b).SOLUTION: The cutting device comprises: a holding part 10 that holds a tubular member (1b) turnably around a shaft core thereof; a cutting blade 20 that is pressed against an outer peripheral surface of the tubular member (1b) held by the holding part 10 from a direction orthogonal to the shaft core thereof; and a turning power input part (14) that inputs turning force to the holding part 10.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a cutting device that cuts a cylindrical member made of a soft material to be cut along a radial direction.

  For example, in Patent Document 1, a resin pipe set on a set surface composed of a pair of frame plates separated by a predetermined interval is cut with a cutter blade so as to be perpendicular to the longitudinal direction of the pipe. A pipe cutting device is disclosed in which a cut surface is obtained.

Japanese Patent No. 2731372

  Since a dimensional error may occur when manufacturing an industrial product or the like, quality control is generally performed by periodically performing a sampling inspection. In such a sampling inspection, when the inspection object is relatively large, it is possible to measure the dimensions using a caliper or the like, but when the inspection object is relatively small, the dimensions are measured using a caliper or the like. It can be difficult to measure.

  By the way, when the quality control of the insulation coating of an electric wire is performed as the cylindrical member to be cut, it is required to measure the thickness of the insulation coating by the sampling inspection.

  For such measurement, image processing technology of a computer can be used. In that case, the insulating coating is cut into round pieces, an image is taken from one cut surface side of the round piece member, the photographed image is enlarged by, for example, about 10 to 100 times, and the shape and dimensions are measured. It is conceivable to measure the thickness of the member.

  Here, when the core wire of the electric wire is a stranded wire, if the stranded wire is removed from the electric wire to form a single insulating coating, the shape of the central hole of the insulating coating follows the outer diameter of the stranded wire. In addition, the central hole of the insulating coating is in a helically twisted state. For this reason, the thickness of the insulating coating at a specific phase varies at each position in the longitudinal direction. The thickness of the insulating coating is the thickness of the thinnest part.

  When such an insulating coating is soft, it has been found that the reliability of the measurement by the image processing technique decreases as the ring width (dimension along the longitudinal direction) is increased.

  That is, as described above, when the core wire 1a is removed from the electric wire 1 to form the insulating coating 1b alone, the center hole 1c of the insulating coating 1b is twisted in a spiral shape, for example, as shown in FIG. From this relationship, the ring cutting width of the insulating coating 1b is set to be large, for example, from the first cutting position indicated by line (8)-(8) in FIG. 8 to the second cutting position indicated by line (9)-(9). In this case, as shown in FIG. 9, since the twist angle α1 of the center hole 1c of the ring cutting member 1d is increased, when viewed from the first cut surface side cut at the first cutting position in the ring cutting member 1d, The degree to which the inner peripheral edge 1f of the second cut surface cut at the second cutting position on the inner diameter side with respect to the inner peripheral edge 1e in the first cut surface is increased. From this relationship, when an image from the first cut surface side of the circular cutting member 1d is acquired by the image processing technique and the thickness measurement is performed using this image, the thickness of the thinnest portion of the circular cutting member 1d in the image is obtained. The dimension t1 (the dimension from the outer peripheral edge of the ring cutting member 1d to the bottom of the radially outward recess of the inner peripheral edge 1e of the first cut surface) should be measured as the thickness of the ring cutting member 1d. The thickness dimension t2 of the thick part (the dimension from the outer peripheral edge of the ring cutting member 1d to the tip of the radially inward convex portion of the inner peripheral edge 1f of the second cut surface) is erroneously measured as the thickness of the circular cutting member 1d. Can happen.

  On the other hand, when the cut width of the insulating coating 1b is set to be small, for example, from the first cutting position indicated by line (8)-(8) in FIG. 8 to the second cutting position indicated by line (10)-(10). 10, the twist angle α2 of the center hole 1c of the ring cutting member 1d becomes smaller as the ring cutting member 1d becomes smaller as shown in FIG. The degree to which the inner peripheral edge 1f of the cut surface is exposed is reduced. From that relationship, by acquiring an image from the first cut surface side of the ring cutting member 1d by the image processing technique, and performing a thickness measurement using this image, even if the wrong measurement as described above occurs, The amount of deviation with respect to the measurement dimension in the correct measurement is small.

  Here, when the pipe cutting device shown in Patent Document 1 is used to cut the soft insulation coating as described above, the cutter blade is pressed from the radial direction because the insulation coating is soft. It has been found that the cut surface tends to be wavy due to the bending of the insulating coating with pressure. This phenomenon occurs more remarkably when the ring cutting width is reduced.

  In addition, for example, as shown in FIG. 14, when cutting the end of the cylindrical member 200 placed on the set surface 100 with one cutter blade 101, or as shown in FIG. 15, the two cutter blades 101 are When using and cutting, there is a concern that the burr 201 may occur at the end of cutting of the cutter blade 101. When such a burr 201 is generated, it is impossible to accurately measure the thickness of the cylindrical member 200 with the image processing technique.

  For this reason, when cutting the soft insulating coating, it is desired to make the cut surface straight and avoid the occurrence of burrs.

  In view of such circumstances, the present invention is a cutting apparatus that cuts a cylindrical member made of a soft material to be cut along a radial direction, and in particular, when cutting a soft cylindrical member, the cutting surface is straightened. The purpose is to make it possible to avoid the occurrence of burrs.

  A cutting device according to the present invention is a cutting device that cuts a cylindrical member made of a soft material to be cut along a radial direction thereof, and holds the cylindrical member so as to be rotatable around its axis. A holding portion, a cutting blade pressed against the outer peripheral surface of the cylindrical member held by the holding portion from a direction orthogonal to the axis, and a turning power input portion for inputting turning power to the holding portion. It is characterized by having.

  In this configuration, the cutting power is input from the rotational power input unit in a state in which the cutting blade is pressed against the outer peripheral surface of the cylindrical member held by the holding unit from a direction perpendicular to the axis of the cylindrical member. The cutting blade is cut into the cylindrical member by rotating the holding portion with rotational power, whereby a cutting cut is formed in the cylindrical member over the entire circumference.

  In addition, the said soft material means that the said cylindrical member will bend in the radial direction when it tries to push out the said cutting blade to the outer peripheral surface in the said cylindrical member from radial direction.

  As described above, when the cutting blade is pressed against the outer peripheral surface of the cylindrical member made of the soft material to be cut from the direction orthogonal to the axis, the cutting blade applies the pressing blade to the cutting blade. Bites into the tubular member. This biting amount varies depending on the pressing load.

  In that state, when the holding unit and the cylindrical member are rotated in at least one direction by the rotational power input unit, the cutting blade is gradually and deeply cut into the cylindrical member. Since the tubular member is gradually cut in the circumferential direction, the tubular member is not bent and a cutting cut is formed in the tubular member over the entire circumference. Thereby, the cut surface of the said cylindrical member becomes straight. This cutting position is referred to as a “first cutting position”.

  In the present invention as described above, when the cylindrical member made of the soft material is pressed from the radial direction with the cutting blade in the above-mentioned Patent Document 1 (reference), the cut surface of the cylindrical member has a wavy shape. This eliminates the problem of burrs.

  Thereafter, either the cutting blade or the holding portion is displaced so as to be arranged at a second cutting position offset from the first cutting position in the longitudinal direction of the cylindrical member, and then the cutting is performed again. When the blade is pressed against the outer peripheral surface of the cylindrical member from a direction orthogonal to the axis thereof, the holding power and the cylindrical member are rotated in at least one direction by the rotational power input unit. The shaped member will be cut. The ring width is arbitrarily set according to the offset dimension.

  In the present invention as described above, both the cut surfaces of the ring-cut member can be straightened, and burrs can be prevented from occurring. As described above, the reliability of measurement can be increased as much as possible even when measurement is performed using an image processing technique.

  Preferably, in the cutting device according to the present invention, a support portion that supports the cylindrical member from the side opposite to the pressing direction of the cutting blade is further provided in the vicinity of the pressing position of the cutting blade in the cylindrical member. Prepare.

  In this configuration, since the support member supports the cylindrical member, the cylindrical member does not bend when the cutting blade is pressed against the cylindrical member, which is advantageous in straightening the cut surface. Become.

  Preferably, the cutting device according to the present invention further includes a cutting operation unit for pulling the cutting blade away from the outer peripheral surface of the cylindrical member or bringing it closer to the opposite side.

  With this configuration, it is possible to relatively easily perform the pressing operation and the separating operation of the cutting blade when cutting the cylindrical member.

  Preferably, the cutting device according to the present invention further includes a cutting position adjusting unit for displacing a relative position with respect to the cutting blade by sliding the holding unit in a rotational axis direction.

  In this structure, the operation | work for obtaining the member cut off by cutting the said cylindrical member in two places separated in the longitudinal direction becomes easy.

  Preferably, the cutting blade is provided with a blade on an outer periphery of a circular plate, and is supported by a holder so as to be rotatable around its axis, and the cutting blade is not rotated on the holder. A state switching member is provided for enabling or turning the state.

  With this configuration, when the cutting edge of the cutting blade is worn over time, the cutting blade can be used by changing the cutting location by rotating the cutting blade in any one direction. This eliminates the need to replace the cutting blade over a long period of time, which is advantageous in reducing the replacement cost.

  Preferably, the holding portion includes a rotation shaft that is rotatably supported and a gripping device that is provided on one end side in the axial direction of the rotation shaft and holds the cylindrical member coaxially. The power input unit is provided on the other axial end side of the rotating shaft and is a rotating operation handle for rotating the rotating shaft about its axis when manually rotated.

  Here, it is clarified that the structure of the holding portion is relatively simple. Thereby, it becomes possible to contribute to the reduction of the equipment cost of the cutting device.

  Further, since the rotation operation handle as the rotation power input unit is manually rotated, the rotation shaft of the holding unit and the gripping device are rotated in at least one direction. As compared with the case where a rotational power source such as the above is installed, it is advantageous in suppressing an increase in equipment cost of the cutting device according to the present invention.

  Preferably, the holding portion holds the cylindrical member in a lateral posture in which the longitudinal direction thereof is along the left-right direction, and the cutting blade is disposed above the cylindrical member.

  In this configuration, when the cutting blade is pressed against the outer peripheral surface of the tubular member, it becomes clear that the weight of the cutting blade acts as the pressing load. As a result, the pressing load can be adjusted by the weight of the cutting blade and the weight attached thereto, and the pressurizing means is not required, so that it can contribute to the reduction of the equipment cost of the cutting apparatus. Become.

  The present invention relates to a cutting device that cuts a cylindrical member made of a soft material to be cut along a radial direction, and generates a burr after making the cut surface straight when cutting the cylindrical member made of a soft material. It can be avoided.

1 is a side view showing an overall appearance of an embodiment of a cutting device according to the present invention. It is the front view seen from the arrow (2) direction of FIG. It is a perspective view which shows the cylindrical member (insulation coating | cover of an electric wire) used as the cutting object of the cutting device of FIG. 1 and FIG. It is a side view which expands and shows the cutting blade of FIG. 1 and FIG. It is a disassembled perspective view which expands and shows the support part of FIG. 1 and FIG. It is process drawing which shows the initial stage of the cutting | disconnection operation | work by the cutting device of FIG. 1 and FIG. FIG. 7 is a process diagram showing a continuation of FIG. 6. It is the figure which made the insulation coating of the electric wire of FIG. 3 the cross section along the axial direction. The insulating coating of FIG. 8 is viewed from the side of the first cut surface when the ring is cut at a width from the first cutting position indicated by line (8)-(8) to the second cutting position indicated by line (9)-(9). It is a figure. The insulating coating shown in FIG. 8 is viewed from the first cut surface when the ring is cut from the first cutting position indicated by line (8)-(8) to the second cutting position indicated by line (10)-(10). It is a figure. It is a front view which shows other embodiment of the cutting blade of the cutting device which concerns on this invention. It is a figure corresponding to Drawing 2 in other embodiments of a cutting device concerning the present invention. It is a figure corresponding to Drawing 2 in other embodiments of a cutting device concerning the present invention. It is a figure for demonstrating the malfunction when using one cutter blade in a prior art example. It is a figure for demonstrating the malfunction in the case of using two cutter blades in a prior art example.

  BEST MODE FOR CARRYING OUT THE INVENTION Best modes for carrying out the present invention will be described in detail below with reference to the accompanying drawings.

  1 to 10 show an embodiment of the present invention. In the figure, 1 is an electric wire, 2 is the whole cutting device.

  As shown in FIG. 3, the electric wire 1 has a configuration in which the core wire 1a is covered with an insulating coating 1b. The core wire 1a is a stranded wire formed by twisting a large number of wires. The insulating coating 1b is a cylindrical member made of, for example, an insulating material, and is formed of, for example, a synthetic resin such as vinyl chloride (PVC) or polyethylene (PE), an appropriate synthetic rubber, natural rubber, or the like.

  Incidentally, when the core wire 1a made of the stranded wire is removed from the electric wire 1 to make the insulating coating 1b alone, for example, the center hole 1c of the insulating coating 1b is spirally twisted as shown in FIG. Become a shape. The insulation coating 1b of the electric wire 1 corresponds to a cylindrical member to be cut.

  The cutting device 2 includes a holding unit 10, a cutting blade 20, a rotation operation handle 14 as a rotation power input unit, a cutting operation unit 30, a support unit 40, a cutting position adjusting unit 50, and the like. 60 is installed.

  The holding unit 10 includes a rotating shaft 11, a gripping device 12, a bearing device 13, and the like. The rotating shaft 11 is rotatably supported by the bearing device 13 in a state where the axis of the rotating shaft 11 is in a lateral posture along the left-right direction (horizontal direction). Although the internal structure of the bearing device 13 is not shown in detail, the bearing device 13 supports, for example, two locations separated in the axial direction of the rotating shaft 11 by radial ball bearings, and is fixed on the slide table 51 described below. ing.

  The gripping device 12 is provided on one end side in the axial direction of the rotary shaft 11, and is a drill chuck or the like that holds a cylindrical member to be cut (such as the insulation coating 1 b of the electric wire 1) coaxially with the rotary shaft 11. The Since the gripping device 12 including a drill chuck or the like has a well-known configuration, detailed description and illustration thereof are omitted, but the inscribed portions of a large number of claw-like members 12a (see FIG. 1) arranged at equal intervals around the circumference. When the circle is made smaller, the electric wire 1 can be grasped, while when the inscribed circle is made larger, the electric wire 1 can be released.

  The rotation operation handle 14 rotates the rotation shaft 11 around its axis. This rotation operation handle 14 is configured such that a rod-like knob 14b is integrally provided at a predetermined circumferential position near the outer periphery on the outer end surface of the cylindrical body portion 14a fixed to the other axial end of the rotary shaft 11. Yes.

  When the operator grips the rod-like knob 14b and manually rotates the cylindrical body 14a in at least one direction, the rotating shaft 11 integrated with the cylindrical body 14a is driven to rotate in the same direction as described above. Will be. Thus, the rotational power input to the rotational operation handle 14 is directly transmitted to the rotary shaft 11.

  The cutting blade 20 is provided with a blade on the outer periphery of a circular plate, and is fixed to a holder 21 as shown in FIG.

  The holder 21 is formed in a box shape having an opening on the lower side, and a cutting blade 20 is attached to an opposing space between a pair of front and rear walls (reference numerals omitted) using bolts 22 and nuts 23.

  The bolt 22 is attached so as to pass through a predetermined position of a pair of wall portions spaced apart from each other in the holder 21 and the center of the cutting blade 20. In this bolt 22, a nut 23 is screwed and attached to a tip portion protruding outward from one wall portion of the pair of wall portions. When the nut 23 is tightened, the cutting blade 20 is fixed to the holder 21 in a non-rotatable state, while when the nut 23 is loosened, the cutting blade 20 can be rotated to the holder 21. The bolt 22 and the nut 23 correspond to a “state switching member” described in the claims.

  The cutting blade 20 is accommodated so as not to protrude downward from the internal space of the holder 21, thereby suppressing or preventing the operator from touching the cutting blade 20 and being injured. . However, it is possible to press a part of the cutting blade 20 against the cylindrical member (insulation coating 1b of the electric wire 1) by providing a triangular cutout 21a under the pair of wall portions of the holder 21. And so on.

  The holder 21 is provided with a load adjusting unit 24. The load adjusting unit 24 adjusts a load for pressing the cutting blade 20 against the cylindrical member (insulation coating 1b of the electric wire 1). As shown in FIG. A weight 24b and the like are provided.

  The rod-shaped member 24a is attached to the holder 21 in a posture along the vertical direction. The weight 24b is formed in a cylindrical shape, and is fitted in a state having a detachable clearance on the outer diameter side of the rod-shaped member 24a. The load adjusting unit 24 increases / decreases the pressing load by increasing / decreasing the number of weights 24b attached to the rod-shaped member 24a.

  The cutting operation unit 30 pulls the cutting blade 20 away from the outer peripheral surface of the cylindrical member (insulation coating 1b of the electric wire 1) in the radial direction (direction orthogonal to the axis of the cylindrical member), or closes the opposite direction. And includes a pair of support columns 31, a fixed beam 32, a movable beam 33, and the like. In this embodiment, the cutting operation part 30 displaces the cutting blade 20 up and down in the vertical direction.

  The pair of support columns 31 are fixed on the base 60. The fixed beam 32 is fixed to the upper part of the pair of columns 31. The movable beam 33 is attached in the longitudinal direction of the pair of support columns 31 so as to be slidable in the longitudinal direction of the support column 31 (here, the vertical direction, that is, the vertical direction). One strut 31 is provided with a stopper ring 34 for limiting the lowered position of the cutting blade 20. The stopper ring 34 receives the movable beam 33 to limit the lowered position of the cutting blade 20.

  The holder 21 of the cutting blade 20 is fixed to the movable beam 33, and a stopper pin 35 is provided on the movable beam 33. The stopper pin 35 is inserted into a through hole (not shown) provided in the movable beam 33, and the tip side thereof can be inserted into or extracted from a receiving hole (not shown) of the fixed beam 32.

  Here, when the movable beam 33 is lifted so as to be close to the fixed beam 32 and the distal end side of the stopper pin 35 is inserted into the receiving hole of the fixed beam 32, the movable beam 33 is suspended and supported by the fixed beam 32. The cutting blade 20 is pulled away above the cylindrical member (insulation coating 1b of the electric wire 1) held by the holding portion 10 because of being connected in a state. In this state, when the distal end side of the stopper pin 35 is extracted from the receiving hole of the fixed beam 32, the movable beam 33 is disconnected from the fixed beam 32, so that the movable beam 33 descends, and the holding portion The cutting blade 20 is brought close to the tubular member (insulation coating 1b of the electric wire 1) held by the member 10.

  The support part 40 supports the said cylindrical member (insulation coating 1b of the electric wire 1) from the opposite side (here lower side) with the pressing direction (here downward direction) of the cutting blade 20, and is shown in FIG. As shown, a receiving member 41, a pressing member 42, and the like are provided.

  The receiving member 41 is installed on the base 60 at a position that is offset by a predetermined amount in the lateral direction from the expected pressing position of the cutting blade 20. The receiving member 41 is installed on the base 60 via a base portion 41a. The receiving member 41 is detachably connected to the base portion 41a with a connecting screw 41b.

  An upward concave portion 41 c is provided on the upper portion of the receiving member 41. The upward recess 41c has an inverted triangular shape in a side view, and when the tubular member (insulation coating 1b of the electric wire 1) is placed thereon, the cutting object is prevented from being displaced and positioned. To do.

  The pressing member 42 presses the cylindrical member (insulation coating 1b of the electric wire 1) placed on the upward concave portion 41c of the receiving member 41 from above, and is a direction (here, up and down direction) approaching or separating from the support portion 40. In other words, it is installed to be displaceable in the vertical direction). A downward concave portion 42 a is provided at the lower portion of the pressing member 42. The downward concave portion 42a has a triangular shape as viewed from the side, and presses the cylindrical member (insulation coating 1b of the electric wire 1) placed on the upward concave portion 41c of the receiving member 41 from above.

  The pressing member 42 is provided with a pair of long holes 42b that are long in the vertical direction, and the receiving member 41 is provided with a pair of guide screws 41d that are individually inserted into the pair of long holes 42b. ing. When the guide screw 41d is tightened, the pressing member 42 is fixedly connected to the receiving member 41, and when the guide screw 41d is loosened, the connection is released and the pressing member 42 extends along the pair of long holes 42b. It can slide in the vertical direction.

  According to such a support portion 40, the tubular member (insulation coating 1 b of the electric wire 1) positioned and placed on the deepest portion of the upward concave portion 41 c of the receiving member 41 is placed at the deepest portion of the downward concave portion 42 a of the pressing member 42. By connecting the holding member 42 to the receiving member 41 with the guide screw 41d so as to hold it, the receiving member 41 and the holding member 42 support the tube member (insulation coating 1b of the electric wire 1) sandwiched between them. Can do.

  The cutting position adjusting unit 50 is configured to displace the gripping device 12 from the cutting blade 20 by sliding the entire holding unit 10 in the direction of the rotational axis of the rotary shaft 11. 52 and the like.

  The slide table 51 is installed on the base 60 so as to be linearly slidable, and is elastically biased toward the side where the cutting blade 20 is present by biasing means (such as a compression coil spring) (not shown). It has become.

  The operation unit 52 is provided on one side of the slide table 51 and has a configuration using a feed screw mechanism such as a known micrometer.

  The operation unit 52 includes a rotation operation dial 53, a guide sleeve 54, and the like. The rotation operation dial 53 is integrally provided with a small-diameter shaft portion 53a, and a male screw (not shown) is provided on an outer peripheral surface of a predetermined region in the axial direction of the small-diameter shaft portion 53a. On the free end side of the small diameter shaft portion 53a, a projecting piece 51a integrally attached to the slide table 51 is brought into pressure contact with the urging force of the urging means. The center hole of the guide sleeve 54 is provided with a female screw (not shown) into which the small-diameter shaft portion 53a of the rotation operation dial 53 is screwed. The free end side of the guide sleeve 54 is fixed to the base 60 so as not to move in the axial direction and the circumferential direction.

  As an operation, when the rotation operation dial 53 of the operation portion 52 is manually rotated in any one direction, the feed screw action of the screwed portion between the small diameter shaft portion 53a of the rotation operation dial 53 and the guide sleeve 54 is used. The rotation operation dial 53 is slid linearly while spirally rotating. As a result, the position of the free end of the small-diameter shaft portion 53a integral with the rotation operation dial 53 is displaced in the axial direction, so that the projecting piece urged toward the cutting blade 20 by the urging means along with the displacement. 51a and the slide table 51 are linearly slid to the cutting blade 20 side or the opposite side.

  A scale (not shown) is provided on the outer peripheral surface of the guide sleeve 54 so that the slide amount can be visually confirmed. On the other side of the slide table 51, a positioning screw 55 for positioning the slide table 51 so as not to slide is provided. When the positioning screw 55 is tightened, the slide table 51 cannot slide, and when the positioning screw 55 is loosened, the slide table 51 can slide.

  Next, an example of use of the cutting device 2 having the above configuration will be described. Here, the example which cuts the cylindrical member (insulation coating 1b of the electric wire 1) used as cutting object is given. The core wire 1a of the electric wire 1 is left as it is.

  First, a predetermined position on the other end side in the longitudinal direction of the electric wire 1 is supported by the support portion 40 while attaching one end side in the longitudinal direction of the electric wire 1 to the holding device 12 of the holding unit 10 (see FIG. 6). At this time, the supporting portion 40 is sandwiched between the receiving member 41 and the pressing member 42 by adjusting the tightening degree of the guide screw 41 d so that the pressing member 42 can move in the vertical direction with respect to the receiving member 41. The wire 1 is allowed to rotate and to be displaced in the axial direction.

  In this state, the cutting blade 20 is lowered by the cutting operation unit 30 and pressed against the outer peripheral surface of the insulating coating 1b of the electric wire 1 from the radial direction.

  At this time, the total weight of the weight of the cutting blade 20, the weight of the holder 21, the weight of the movable beam 33 and the weight of the load adjusting unit 24 acts as a pressing load against the electric wire 1. Just by pressing the blade 20, the cutting blade 20 bites into the insulating coating 1 b of the electric wire 1 by a predetermined amount as shown in FIG. 6. The biting amount is arbitrary, but can be arbitrarily set by adjusting the total weight with the load adjusting unit 24.

  In this state, the gripping device 12 and the electric wire 1 held by the gripping device 12 are rotated by manually rotating the rotation operation handle 14 of the holding unit 10 in any one direction. As a result, as shown in FIG. 7, the cutting blade 20 is gradually cut deeply inward in the radial direction into the insulating coating 1b of the electric wire 1, and the insulating coating 1b is gradually cut in the circumferential direction. Thus, a cutting cut is formed.

  The number of rotations of the gripping device 12 and the electric wire 1 is arbitrary. For example, when the gripping device 12 and the wire 1 are rotated once or more than once, the insulation coating 1b can be completely separated from the outer diameter side to the inner diameter side. It becomes possible. In this state, the insulating coating 1b can be separated into two in the longitudinal direction. This cutting position is referred to as a “first cutting position”.

  Next, the cutting blade 20 is lifted by the cutting operation unit 30 to be separated from the outer peripheral surface of the insulating coating 1 b of the electric wire 1.

  After that, by manually rotating the turning operation dial 53 of the cutting position adjusting unit 50 in any one direction, the entire slide table 51 and the holding unit 10 are linearly moved toward the cutting blade 20. And a position (second cutting position) offset from the first cutting position of the insulating coating 1b to one side in the longitudinal direction of the insulating coating 1b is disposed at the position where the cutting blade 20 is present. This sliding amount becomes the ring width of the insulating coating 1b.

  After that, the cutting blade 20 is lowered by the cutting operation unit 30 and pressed against the outer peripheral surface of the insulating coating 1b of the electric wire 1 from the radial direction to cause the cutting blade 20 to bite into the insulating coating 1b, and then the holding unit 10 The rotating operation handle 14 is manually rotated a predetermined number of times to rotate the electric wire 1 together with the gripping device 12. As a result, the cutting blade 20 is gradually and deeply cut inward in the radial direction into the insulating coating 1b of the electric wire 1, and the insulating coating 1b is gradually cut in the circumferential direction so as to cut the cutting. Is formed.

  Because of this, two cutting cuts are formed in the middle of the insulating coating 1b in the longitudinal direction, and the portion between the two cutting cuts becomes the ring cutting member 1d. By pulling out one end side in the longitudinal direction of the insulating coating 1b, the ring cutting member 1d having a predetermined width can be taken out.

  Thus, when the insulation coating 1b of the electric wire 1 is cut in a circle, the core wire 1a of the electric wire 1 is left untouched, so that the cutting blade 20 is pressed against the outer peripheral surface of the insulation coating 1b so that the electric wire 1 is in one direction. When it is rotated to the center, the cutting edge of the cutting blade 20 comes into contact with the core wire 1a and is received. Moreover, since the middle portion of the electric wire 1 in the longitudinal direction is supported by the support portion 40, even when the insulating coating 1b is soft, it does not bend when the cutting blade 20 is pressed. For this reason, the cut surface of the insulating coating 1b is not wavy but straight, and burrs are not generated.

  As described above, in the cutting device 2 according to the embodiment to which the present invention is applied, even when the cylindrical member to be cut is the insulating coating 1b made of the soft material of the electric wire 1, the cylindrical shape is used as described above. It becomes possible to cut in a state where the member is not bent. As a result, it is possible to avoid the occurrence of burrs while straightening the cut surface with a relatively simple operation (operation that does not require skill) of the tubular member.

  Therefore, even when the insulating coating 1b made of the soft material of the electric wire 1 is thinly cut as in this embodiment, it is possible to easily obtain the ring cutting member 1d that does not lose its shape. As a result, accurate measurement is possible even when the thickness of the ring cutting member 1d is measured using the image processing technique as described in the conventional example, and the quality control in manufacturing the electric wire 1 is enhanced. Will be able to contribute. The thickness of the insulating coating 1b is the thickness of the thinnest part.

  Here, the reason why the more accurate measurement becomes possible as the width of the ring-cutting member 1d is made thinner (smaller) is described in the section of the conventional example, but is as follows.

  That is, when the core wire 1a is removed from the electric wire 1 to be cut to form the insulating coating 1b alone, as shown in FIG. 8, for example, the center hole 1c of the insulating coating 1b is spirally twisted. From this relationship, the ring cutting width of the insulating coating 1b is set to be large, for example, from the first cutting position indicated by line (8)-(8) in FIG. 8 to the second cutting position indicated by line (9)-(9). In this case, as shown in FIG. 9, since the twist angle α1 of the center hole 1c of the ring cutting member 1d is increased, when viewed from the first cut surface side cut at the first cutting position in the ring cutting member 1d, The degree to which the inner peripheral edge 1f of the second cut surface cut at the second cutting position on the inner diameter side with respect to the inner peripheral edge 1e in the first cut surface is increased. From this relationship, when an image from the first cut surface side of the circular cutting member 1d is acquired by the image processing technique and the thickness measurement is performed using this image, the thickness of the thinnest portion of the circular cutting member 1d in the image is obtained. The dimension t1 (the dimension from the outer peripheral edge of the ring cutting member 1d to the bottom of the radially outward recess of the inner peripheral edge 1e of the first cut surface) should be measured as the thickness of the ring cutting member 1d. The thickness dimension t2 of the thick part (the dimension from the outer peripheral edge of the ring cutting member 1d to the tip of the radially inward convex portion of the inner peripheral edge 1f of the second cut surface) is erroneously measured as the thickness of the circular cutting member 1d. Can happen.

  On the other hand, when the cut width of the insulating coating 1b is set to be small, for example, from the first cutting position indicated by line (8)-(8) in FIG. 8 to the second cutting position indicated by line (10)-(10). 10, the twist angle α2 of the center hole 1c of the ring cutting member 1d becomes smaller as the ring cutting member 1d becomes smaller as shown in FIG. The degree to which the inner peripheral edge 1f of the cut surface is exposed is reduced. From that relationship, by acquiring an image from the first cut surface side of the ring cutting member 1d by the image processing technique, and performing a thickness measurement using this image, even if the wrong measurement as described above occurs, The degree of decrease in the amount of deviation with respect to the measurement dimension in the correct measurement can be small.

  In addition, this invention is not limited only to the said embodiment, It can change suitably in the range equivalent to the claim and the said range.

  (1) In the above embodiment, the cutting blade 20 is a circular plate and the blade is provided on the outer periphery. However, the present invention is not limited to this. For example, as shown in FIG. 11, the cutting blade 20 may be a rectangular plate and the blade may be provided on the lower side. In addition, the outer shape of the cutting blade 20 is not particularly limited, but the shape of the cutting edge of the cutting blade 20 may be a curved shape.

  (2) In the above embodiment, an example is given in which the cutting blade 20 is linearly displaced in the vertical direction by the cutting operation unit 30, but the present invention is not limited to this.

  For example, as shown in FIG. 12, the cutting blade 20 can be linearly displaced in the left-right direction, or the cutting blade 20 can be linearly displaced in an oblique direction (not shown).

  In that case, a pressurizing means for applying a predetermined pressing load when the cutting blade 20 is pressed against the outer periphery of a cylindrical member (for example, the insulation coating 1b of the electric wire 1) to be cut (reference numeral in FIG. 12). 70) is required. As the pressurizing means, for example, a compression coil spring, a hydraulic actuator or an electric actuator can be used.

  In addition to this, although not shown, for example, a rotation support shaft is disposed outside the cylindrical member (insulation coating 1b of the electric wire 1) to be cut, and the rotation support shaft is cut through an arm. By supporting the blade 20 and displacing the cutting blade 20 like a pendulum with the rotating support shaft as a fulcrum, the cutting blade 20 is pressed against the outer peripheral surface of the cylindrical member. Is possible.

  In this embodiment, when the rotation support shaft is arranged vertically above the cutting blade 20, a predetermined pressing load acts on the outer peripheral surface of the cylindrical member by its own weight. However, when the rotating support shaft is disposed vertically below the cutting blade 20, a pressing load due to the weight of the cutting blade 20 does not occur. In this case, a predetermined pressing load is applied. It is preferable to use a pressurizing means (not shown) for applying.

  (3) In the said embodiment, although the example which made the rotating shaft 11 of the holding | maintenance part 10 the horizontal orientation is given, this invention is not limited only to this. For example, as shown in FIG. 13, the rotation shaft 11 of the holding unit 10 can be in a vertical orientation. In that case, it is necessary to arrange the cutting blade 20 on the side of the holding part 10.

  (4) In the above embodiment, for example, the gripping device 12 grips and separates the tubular member (for example, the insulation coating 1 b of the electric wire 1), and the cylindrical member (for example, the insulation coating of the electric wire 1) by the turning operation handle 14. An example in which the rotation operation of 1b), the displacement operation of the cutting blade 20 by the cutting operation unit 30, the sliding operation of the cylindrical member (for example, the insulation coating 1b of the electric wire 1) by the cutting position adjusting unit 50, etc. are given manually. However, the present invention is not limited to this.

  Although not shown, for example, the gripping device 12 grips and separates the cylindrical member (for example, the insulating coating 1b of the electric wire 1), and the cylindrical member (for example, the insulating coating 1b of the electric wire 1) by the rotation operation handle 14 At least one of the following operations: a rotation operation, a displacement operation of the cutting blade 20 by the cutting operation unit 30, and a sliding operation of the cylindrical member (for example, the insulation coating 1b of the electric wire 1) by the cutting position adjustment unit 50 It is possible to adopt a configuration that automatically performs using an apparatus.

  (5) In the said embodiment, when the cylindrical member used as cutting object is made into the insulation coating 1b of the electric wire 1, the example hold | maintained by the holding | maintenance part 10 leaving the core wire 1a in the said insulation coating 1b is given. However, the present invention is not limited to this.

  For example, although not shown, when the core wire 1a is removed from the insulation coating 1b before the insulation coating 1b is cut, an appropriate core material (not shown) is placed in the center hole 1c of the insulation coating 1b. It is preferable to insert it and hold it in the holding part 10. If it does in this way, it will become possible to cut with sufficient accuracy like the above-mentioned embodiment.

  (6) In the above embodiment, an example in which a drill chuck is used as the gripping device 12 of the holding unit 10 is described, but the present invention is not limited to this.

  As the gripping device 12, for example, although not shown, a scroll chuck used for a lathe or the like, a collet chuck used for a milling cutter, or the like can be used.

  (7) In the above embodiment, an example is given in which the tubular member to be cut is the insulating coating 1b of the electric wire 1, but the present invention is not limited to this. The shape of the central hole of the tubular member to be cut is not limited to the cross-sectional petal shape as described in the above embodiment, and may be, for example, a circular cross-section.

  INDUSTRIAL APPLICATION This invention can be suitably utilized for the cutting device which cut | disconnects the cylindrical member made from a soft material used as cutting object along a radial direction.

1 Electric wire
1a core wire
1b Insulation coating (cylindrical member to be cut)
1c Center hole
1d Ring cutting member 2 Cutting device
10 Holding part
11 Rotating shaft
12 Gripping device
13 Bearing device
14 Rotation operation handle (Rotation power input part)
20 Cutting blade
21 Holder
22 volts
23 Nut
30 Cutting operation part
31 A pair of struts
32 Fixed beams
33 Movable beam
40 Supporting part
41 receiving member
42 Holding member
50 Cutting position adjuster
51 slide table
52 Operation unit
53 Rotation operation dial
54 Guide sleeve
60 base

Claims (7)

A cutting device for cutting a cylindrical member made of a soft material to be cut along its radial direction,
A holding portion for holding the cylindrical member so as to be rotatable about its axis;
A cutting blade pressed against the outer peripheral surface of the cylindrical member held by the holding portion from a direction orthogonal to the axis;
A cutting device comprising: a rotation power input unit that inputs rotation power to the holding unit. The cutting device according to claim 1, wherein
The cutting apparatus further comprising a support portion that supports the cylindrical member from a side opposite to a pressing direction of the cutting blade in the vicinity of a pressing position of the cutting blade in the cylindrical member. The cutting device according to claim 1 or 2,
A cutting apparatus, further comprising a cutting operation unit for pulling the cutting blade away from the outer peripheral surface of the cylindrical member or bringing it closer to the opposite side. The cutting device according to any one of claims 1 to 3,
A cutting apparatus, further comprising: a cutting position adjusting unit for displacing a relative position with respect to the cutting blade by sliding the holding unit in a rotational axis direction. In the cutting device according to any one of claims 1 to 4,
The cutting blade is provided with a blade on the outer periphery of a circular plate, and is supported by the holder in a state of being rotatable around its axis,
The cutting device according to claim 1, wherein the holder is provided with a state switching member for making the cutting blade unrotatable or rotatable. In the cutting device according to any one of claims 1 to 5,
The holding portion includes a rotary shaft that is rotatably supported, and a gripping device that is provided on one axial end side of the rotary shaft and holds the cylindrical member coaxially,
The rotation power input unit is provided on the other axial end of the rotation shaft and is a rotation operation handle for rotating the rotation shaft about its axis when manually rotated. A cutting device characterized by that. The cutting device according to any one of claims 1 to 6,
The holding part is to hold the cylindrical member in a lateral orientation in which the longitudinal direction thereof extends in the left-right direction,
The cutting device, wherein the cutting blade is arranged above the cylindrical member.

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