JP2013220494A - Device for cutting rod-like body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for cutting a rod-like body in which no "burr, " chipping or the like is generated on a cut surface, and adjustment is easy with a simple mechanism.SOLUTION: A device for cutting a rod-like body for cutting a rod-like body to be continuously conveyed and fed includes: a support member with a through-hole extending toward a conveying direction; and a cutting blade arranged downstream of the support member in the direction for conveying the rod-like body, sliding along a downstream side face of the support member to cross the through-hole, and holding the rod-like body between the cutting blade itself and an opening end of the through-hole to cut the rod-like body.

Description

  The present invention relates to a rod-shaped body cutting device, and more particularly to a cutting device for cutting a rod-shaped body such as a rod lens or an optical fiber.

  In the manufacture of continuously manufactured refractive index distribution type rod lenses and small-diameter rods such as optical fibers, a rod-shaped body cutting step is required in which the continuously manufactured rods are sequentially cut to a predetermined length. There is a case.

As such cutting, there is a method of cutting a rod-like body continuously drawn from an upstream manufacturing apparatus by lowering a cutting blade from above to a “chopping board”.
However, in this method, the rod-shaped body is cut (cleaved) while being cracked by a crack generated below the lowering cutting blade, so that the cut surface does not become a smooth surface, and the cut rod-shaped body has the desired performance. There was a problem that could not be demonstrated. Furthermore, this method has a problem that micro-breaking scraps are generated, which hinders the next precise alignment process.

  Also proposed is a cutting device that cuts an optical fiber that has passed through a guide hole formed in a guide body between a cutting blade that slides along the guide body and a support blade that is disposed below the cutting blade. ing. (See Patent Document 1).

JP 2004-306204 A

The cutting device of Patent Document 1 is a device that cuts an optical fiber, which is a rod-shaped body, between two upper and lower blades (cutting blade and support blade), so that the cutting edge between the cutting blade and the support blade is moved up and down at the time of cutting. Must be accurately positioned to align.
However, it is not easy to perform this positioning with the desired accuracy, and if positioning is not performed properly, there will be problems such as "breaking" and "chips" on the cut surface of the cut rod-shaped body, and There was a problem that the rod-like body bounces during cutting. Adjustment becomes more difficult as the number of optical fibers to be cut increases.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a rod-like body cutting device that does not cause “breaking” or “chip” on a cutting surface with a simple mechanism. .

According to the present invention,
A rod-shaped body cutting device for cutting a rod-shaped body that is continuously conveyed,
A support member having a through-hole extending in the transport direction;
The support member is disposed downstream of the support member in the conveying direction of the rod, slides across the through hole along the downstream side surface of the support member, and sandwiches the rod member with the open end of the through hole. A cutting blade for cutting
A rod-like body cutting device is provided.

  According to such a configuration, it is easy to position the cutting blade, and it is possible to cut a rod-shaped body that does not cause “breaking” or “chip” on the cutting surface with a simple mechanism.

According to another preferred embodiment of the invention,
The through hole tapers toward the downstream side in the transport direction of the rod-shaped body.
According to such a structure, the rod-shaped body conveyed continuously is reliably passed through the through hole of the support member. Furthermore, there is no concern that the tip of the rod-shaped body after cutting will be caught by the blade and cause trouble in conveying the rod-shaped body.

  According to another preferred aspect of the present invention, the cutting blade is a flat blade.

According to another preferred embodiment of the invention,
The cutting blade has a through-hole through which the rod-shaped body passes, and the rod-shaped body is inserted from the through-hole of the support member into the through-hole of the cutting blade in a state where the through-hole is aligned with the through-hole of the support member. When the cutting blade slides along the downstream side surface of the support member so as to cross the through hole, the through hole of the cutting blade is closed by the downstream side surface of the support member, and the rod-shaped body is cut. Is done.

According to another preferred embodiment of the invention,
The through hole of the cutting blade tapers toward the upstream side in the transport direction of the rod-shaped body.

According to another preferred embodiment of the invention,
The diameter of the opening on the upstream side in the transport direction of the through hole of the cutting blade is larger than the diameter of the opening on the downstream side in the transport direction of the support member.

According to another preferred embodiment of the invention,
Biasing means for urging the support member toward the cutting blade is provided.
According to such a configuration, since the cutting blade reliably contacts the downstream side surface of the support member, the support member and the cutting blade can be reliably arranged in a predetermined relative positional relationship.

According to another preferred embodiment of the invention,
Guiding means for guiding the sliding of the cutting blade along the downstream side surface of the support member is provided.
According to such a configuration, the locus of relative movement between the support member and the cutting blade becomes constant, and the support member and the cutting blade can be reliably arranged in a predetermined relative positional relationship.

According to another preferred embodiment of the invention,
A plurality of the support members are provided, and the plurality of rod-shaped bodies are cut simultaneously.

  According to the present invention having such a configuration, a plurality of rod shapes that do not require precise adjustment of the cutting edge and that do not cause “breaking”, “chips”, or “micro-breaking waste” on the cut surface with a simple mechanism. A body cutting method and apparatus are provided.

It is sectional drawing which shows typically the state cut | disconnected between the cutting blade and support member in the rod-shaped body cutting device of the 1st Embodiment of this invention. It is the perspective view which looked at the supporting member used with the rod-shaped body cutting device of this embodiment from the back side. It is the perspective view which looked at the supporting member of FIG. 2 from the surface side. It is a perspective view from the surface side of the holder which hold | maintains a supporting member in a predetermined position. It is a perspective view from the back surface side of a holder. It is drawing which shows the state by which the cutting blade is arrange | positioned in the upper position. It is sectional drawing which shows typically the state of the rod-shaped body cutting device at the time of rod-shaped body cutting | disconnection which shows the supporting member supported by the cutting blade and the holder. It is a perspective view from the surface side of the cutting blade used with the rod-shaped body cutting device of the 2nd Embodiment of this invention. It is a perspective view from the back surface side of the cutting blade of FIG. In 2nd Embodiment, it is typical sectional drawing which shows the positional relationship of the cutting blade arrange | positioned in the upper position, and a supporting member. In 2nd Embodiment, it is typical sectional drawing which shows the positional relationship of the cutting blade arrange | positioned in the downward position, and a supporting member. In 2nd Embodiment, it is sectional drawing which shows typically the rod-shaped body cutting device of the state by which the cutting blade is arrange | positioned in the upper position which shows the supporting member supported by the cutting blade and the holder.

  Hereinafter, a rod-like body cutting device according to a first embodiment of the present invention will be described with reference to the accompanying drawings.

  The rod-shaped body cutting device according to the present embodiment is a rod that is continuously manufactured by an upstream spinning device and simultaneously cuts eight plastic graded index rod rod yarns that are continuously supplied into a predetermined length. This is a lens yarn (rod-like body) cutting device.

  FIG. 1 shows a state in which one of eight rod lens yarns simultaneously cut in the rod-shaped body cutting device according to the first embodiment of the present invention is cut between a cutting blade and a support member. FIG. 2 is a schematic cross-sectional view, and FIG. 2 is a perspective view seen from the back side (upstream side of the continuously supplied rod-shaped body) of the support member used in the rod-shaped body cutting device of the present embodiment. FIG. 3 is a perspective view of the support member of FIG. 2 as viewed from the surface side (downstream side of the continuously supplied rod-shaped body).

As shown in FIG. 1, the cutting device 1 includes a cutting blade 2 that moves up and down intermittently (that is, at a rate of once for a predetermined time or a predetermined length of conveyance) along the direction indicated by the double arrow in the drawing. Thus, the rod lens raw yarn 6 (rod-like body) that is continuously manufactured by the spinning device on the upstream side and is continuously supplied to the support member 4 at a constant speed along the direction indicated by the single arrow in the figure is a predetermined length. It is a device that cuts into two. Note that the support member may be fixed in this manner and the cutting blade may move up and down, or conversely, the cutting blade may be fixed and the support member may move up and down.
In this embodiment, the rod lens raw yarn 6 that is a rod-shaped body is a so-called refractive index distribution type rod lens raw yarn obtained by spinning an ultraviolet curable molten resin material.

  As shown in FIG. 2, the support member 4 is a substantially octagonal metal plate-like member, and is provided with a frustoconical recess 8 at the center.

A surface (surface) 12 on the side of the support member 4 in contact with the cutting blade 2 has a rectangular cross section extending in the vertical direction (the direction in which the cutting blade 2 moves up and down) in order to reduce wear caused by sliding of the cutting blade. A raised portion 18 is provided at the center in the width direction.
The concave portion 8 penetrates from the back surface (surface opposite to the front surface 12) 10 of the support member 4 to the front surface 12. A large-diameter opening 14 is formed on the back surface 10, and a small-diameter opening 16 is formed on the front surface 12. ing. Therefore, in the support member 4, the recess 8 is a frustoconical through-hole 8 that extends from the back surface 10 to the front surface 12 and tapers. The rod lens raw yarn 6 to be cut is inserted into the through hole 8 as shown in FIG.

  In the present embodiment, the angle formed by the inclined surface of the through hole 8 of the support member 4 and the surface 12 is preferably about 30 to 60 degrees.

  In the rod-shaped body cutting device 1 of the present embodiment, the eight support members 4 having such a configuration are arranged in parallel in the holder, and are manufactured in the through holes 8 of the respective support members 4 by the upstream spinning device. Eight rod lens yarns 6 that are continuously conveyed in parallel are inserted one by one and cut intermittently.

4 is a perspective view from the front surface side of the holder that holds the support member 4 in a predetermined position, and FIG. 5 is a perspective view from the back surface side of the holder.
The holder 20 is an elongated rectangular metal plate, and as shown in FIG. 4, eight concave portions 22 for accommodating the support members 4 are formed at predetermined intervals on an upper portion of one surface (surface). They are arranged in the longitudinal direction.

On the bottom surface 24 of the recess 22, holes (counterbore holes) 28 that do not pass through are provided in two locations, upper and lower, for accommodating the spring. The holes may be provided at two places on the left and right sides or two places on the left and right sides in the oblique direction.
Further, a through hole 30 having a circular cross section through which the rod lens raw yarn 6 is inserted is provided at the center of the bottom surface 24, and the through hole 30 opens on the back surface of the holder 20. As shown in FIG. 6b, the through hole 30 has a tapered portion so that the diameter is larger on the back surface side than the front surface side of the holder 20, but the diameter is the same on the front surface side and the back surface side. There may be.
The size of the diameter of the through hole 30 is not particularly limited, but is preferably substantially the same as or smaller than the size of the large-diameter opening 14 on the back surface 10 of the support member 4.

As shown in FIG. 6 b, in the rod-shaped body cutting device 1 of the present embodiment, the support member 4 is fitted into the recess 22 so that the back surface 10 faces the bottom surface 24 of the recess 22 of the holder 20. That is, the support member 4 is fitted into the holder 20 with the surface 12 facing outward (downward in the conveying direction of the rod lens yarn 6 indicated by a single arrow). At this time, the support member 4 has a vertical orientation in which the bowl-shaped ridges 18 extend in the vertical direction.
The support member 4 fitted in the recess 22 is moved outward by a spring 26 accommodated in a hole 28 provided in the bottom surface 24 so that the back surface 10 is spaced from the bottom surface 24 of the recess 22 of the holding portion 20. It is energized towards.

  The cutting blade 2 is an elongated rectangular plate having a length substantially equal to the length of the holder 20, and a single blade portion 32 of a so-called “flat blade” is formed at one side end. The blade portion 32 is formed on one side edge of the plate-shaped cutting blade 2 so that one surface 35 forms a predetermined angle (for example, 22.5 degrees) with respect to the other surface 33.

  Such a cutting blade 2 is moved upward and downward by sliding along the surface 12 of the support member 4 intermittently (that is, at a rate of once every predetermined time or predetermined length of conveyance) by a vertical movement mechanism (not shown). It can move up and down between the lower positions.

  In the upper position (FIG. 6), the lower end side portion of the cutting blade 2 overlaps the upper part of each support member 4 accommodated in the recess of the holder 20, and is biased outward by a spring in the recess 22. It is set so that the support member 4 is prevented from being pushed out of the recess 22.

The lower position is set so that the blade portion of the cutting blade 2 is disposed below the small-diameter opening 16 formed in the surface 12 of each support member 4 accommodated in the recess of the holder 20. .
Therefore, when the cutting blade 2 moves from the upper position to the lower position, the blade portion of the cutting blade crosses the small diameter opening 16 formed in the surface 12 of the support member 4 in the vertical direction.

  When the cutting blade is a flat blade, it is possible to suppress the wear of the cutting blade to the local wear of the buttocks only by providing a hook-like raised portion on the sliding part of the support member with the cutting blade. By shifting to, and using a new blade, the number of times of use until the replacement due to the life of the blade can be increased, leading to lower costs.

  The rod-shaped body cutting device 1 of the present embodiment has a small-diameter opening 16 in which the blade portion 32 of the cutting blade 2 is provided on the surface 12 of the support member 4 by periodic movement of the cutting blade 2 from the upper position to the lower position. A total of eight rod lens yarns 6 which are periodically crossed and closed, are continuously supplied to the rod-shaped body cutting device 1 at a constant speed, and project from the respective small diameter openings 16 by a predetermined length. It is comprised so that it may cut | disconnect simultaneously between the edge parts of the small diameter opening 16 (FIG. 1).

  At this time, since each support member 4 is pressed against the cutting blade 2 by a spring, a constant contact state is always maintained between each support member 4 and the cutting blade 2, and the rod lens yarn Cutting will be performed.

Next, a rod-like body cutting device according to a second preferred embodiment of the present invention will be described.
In the first embodiment described above, the eight rod lens yarns are simultaneously cut by one cutting blade. However, in the cutting device of the second embodiment, each of the eight support members is paired with each pair. These eight cutting blades are provided independently, and the rod lens yarn is cut between each pair of support members and the cutting blade.

  FIG. 7 is a perspective view from the front surface side of the cutting blade used in the rod-shaped body cutting device according to the second embodiment of the present invention, and FIG. 8 is a perspective view from the rear surface side of the cutting blade in FIG. is there.

  As shown in FIGS. 7 and 8, the cutting blade 34 used in the present embodiment is a substantially octagonal plate-like member made of metal similar to the support member 4.

  Similarly to the support member of the first embodiment, the cutting blade 34 of the present embodiment is also provided with a frustoconical recess 36 at the center. The recess 36 penetrates from the front surface 38 of the cutting blade 34 to the back surface 40, and a large-diameter opening 42 is formed on the front surface 38, and a small-diameter opening 44 is formed on the back surface 40. Therefore, the cutting blade 34 is formed with a frustoconical through-hole 36 extending from the front surface 38 to the back surface 40 while being tapered.

  Also in the rod-shaped body cutting device of the present embodiment, the same support member as that used in the rod-shaped body cutting device of the first embodiment is used. The cutting blade 34 used in the present embodiment is configured such that the diameter of the small diameter opening 44 formed in the back surface 40 is larger than the diameter of the small diameter opening of the support member 4. Further, as shown in FIG. 11, the support member 4 can be held by the holder 20 in the same manner as described above in the first embodiment.

In the rod-shaped body cutting device of this embodiment, the cutting blade 34 is arranged with respect to the support member 4 accommodated in the recess of the holder so that the back surface 40 is in contact with the surface of the support member 4 and the through holes overlap. , Move to the lower position every predetermined time or predetermined length of conveyance, and then return to the upper position.
Next, operation | movement of the rod-shaped body cutting device 46 of this embodiment is demonstrated.
FIG. 9 is a schematic cross-sectional view showing the positional relationship between the cutting blade and the support member arranged at the upper position, and FIG. 10 is a schematic diagram showing the positional relationship between the cutting blade and the support member arranged at the lower position. FIG.

  In the present embodiment, the upper position of the cutting blade shown in FIG. 9 is set so that the center of the through hole 36 of the cutting blade 34 and the center of the through hole 8 of the support member are aligned. In a state where the cutting blade is disposed at the upper position, the rod lens raw yarn continuously conveyed along the direction indicated by the single arrow in the drawing is aligned with the through holes 8 and the cutting blades 34 of the aligned support members. It passes through the through hole 36 and is conveyed downstream.

  When a predetermined time has elapsed and the rod lens yarn of a predetermined length is conveyed downstream from the cutting blade 34, the cutting blade is moved to the lower position shown in FIG. 9, and the rod lens raw yarn is cut. The Thereafter, the cutting blade is returned to the upper position.

  By repeating such vertical movement of the cutting blade, the rod lens raw yarn that is continuously conveyed is cut into a predetermined length.

  The present invention is not limited to the above embodiments, and various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention. is there.

  In the embodiment described above, the cutting blade is slid downward from above, but may be slid upward from below. In the present invention, the cutting blade may be fixed, the support member may be moved, or both may be moved.

  Moreover, although each said embodiment is a structure which cut | disconnects eight rod lens raw yarns simultaneously, the structure which changes the number of support members and cuts the other number of rod lens raw yarns simultaneously may be sufficient. Moreover, the structure which cut | disconnects one rod lens raw yarn may be sufficient.

1: Cutting device, 2: Cutting blade, 4: Support member, 6: Rod lens yarn, 8: Recess, 10: Back surface, 12: Front surface, 14: Large diameter opening, 16: Small diameter opening, 18: Raised portion, 20: holder, 22: recessed portion, 24: bottom surface, 26: spring, 28: hole, 30: through hole, 32: blade portion, 34: cutting blade, 36: recessed portion, 38: back surface, 40: front surface, 42: Large diameter opening, 44: Small diameter opening, 46: Cutting device

Claims (9)

A rod-shaped body cutting device for cutting a rod-shaped body that is continuously conveyed,
A support member having a through-hole extending in the transport direction;
The support member is disposed downstream of the support member in the conveying direction of the rod, slides across the through hole along the downstream side surface of the support member, and sandwiches the rod member with the open end of the through hole. A cutting blade for cutting
The rod-shaped body cutting device characterized by the above-mentioned. The through hole is tapered toward the downstream in the transport direction of the rod-shaped body,
The rod-shaped body cutting device according to claim 1. The cutting blade is a flat blade,
The rod-shaped body cutting device according to claim 1 or 2. The cutting blade has a through-hole through which the rod-shaped body passes, and the rod-shaped body is inserted from the through-hole of the support member into the through-hole of the cutting blade in a state where the through-hole is aligned with the through-hole of the support member. When the cutting blade slides along the downstream side surface of the support member so as to cross the through hole, the through hole of the cutting blade is closed by the downstream side surface of the support member, and the rod-shaped body is cut. Is done,
The rod-shaped body cutting device according to claim 1 or 2. The through-hole of the cutting blade is tapered toward the upstream side in the conveying direction of the rod-shaped body,
The rod-shaped body cutting device according to claim 4. The diameter of the opening on the upstream side in the transport direction of the through hole of the cutting blade is larger than the diameter of the opening on the downstream side in the transport direction of the support member,
The rod-shaped body cutting device according to claim 5. Urging means for urging the support member toward the cutting blade;
The rod-shaped body cutting device according to any one of claims 1 to 6. Guide means for guiding sliding of the cutting blade along the downstream side surface of the support member;
The rod-shaped body cutting device according to any one of claims 1 to 7. A plurality of the supporting members are provided, and a plurality of rod-shaped bodies are cut simultaneously.
The rod-shaped body cutting device according to any one of claims 1 to 8.

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