JP7339651B2 - Rope and its manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rope that is braided into a braid, and more particularly to a rope that can be easily processed such as forming a loop in a part of the rope.

An example of a rope as described above is disclosed in Patent Document 1 below. This rope is constructed such that by contracting it longitudinally around an appropriate one-point region, a space is created between the strands of the one-point region through which the rope can pass. When processing, the end of the rope is inserted into the space, the rope is fed to an arbitrary position, and then one region is extended in the longitudinal direction, so that the inserted part of the rope is sandwiched between the strands at an arbitrary position. fixed.

With such a rope, a portion of the rope can be looped without braiding, tying, or using fasteners.

However, the rope as a whole is constructed so that it can be contracted in the longitudinal direction to form a space between the strands through which the rope can pass. In other words, it is a structure that can shrink, and there is a braid that can be shrunk enough to create a space where the rope can be inserted. For this reason, in the case of a rope that stretches and deforms greatly when tightened, the rope cannot be firmly tightened and fixed, resulting in misalignment.

Conversely, in the case of a rope having a braid in which a space into which the rope can be inserted is not easily obtained, it is not easy to insert the ends of the rope.

Until now, there have been no products in which the mesh size, that is, the pitch, of the part into which the ends of the rope are inserted has been changed in advance.

Japanese Utility Model Laid-Open No. 3-106397

SUMMARY OF THE INVENTION The main object of the present invention is to enable firm tightening and fixation and facilitate processing.

The means therefor is a rope that is braided in a braided form, and is formed with a coarse pitch portion having a hollow portion at an axial center portion and a mesh portion leading from the outer peripheral surface to the hollow portion, at least in part in the longitudinal direction. , the rope, wherein the stitch portion is larger in natural length than the stitches of the portion adjacent to the coarse pitch portion;

In this configuration, the stitch portion of the coarse pitch portion is pre-opened, and there is no need to specially open the stitch portion during processing. In addition, since it is not always necessary to open the stitches wide enough to insert the end of the rope in the portion adjacent to the coarse pitch portion, it is possible to construct the portion in such a manner that it does not become thin when it is tightened.

According to this invention, since the stitch portion of the coarse pitch portion is larger than the stitch portion of the portion adjacent to the coarse pitch portion, it is easy to insert the end portion of the rope during processing. In addition, since the coarse pitch portion has open stitches, the position to be inserted can be easily recognized from the appearance, and processing can be performed easily.

In addition, since the portion adjacent to the coarse pitch portion does not need to be structured so as to be narrowed when tightened, it is possible to realize firm clamping and fixing by the coarse pitch portion when the tube is inserted into the hollow portion of the coarse pitch portion. .

The front view which shows the structure of a rope. Sectional views of a coarse pitch portion and a non-coarse pitch portion of a rope. 1 is a schematic configuration diagram showing an example of a rope-making machine that manufactures a rope; FIG. Explanatory drawing which shows the processing method of a rope. 1 is a perspective view of a jig that can be used for processing ropes; FIG. The front view of the rope which concerns on another example.

One mode for carrying out the present invention will be described below with reference to the drawings.

FIG. 1 shows a portion of the rope 11 on one end side in the longitudinal direction. (a) of FIG. 1 is a front view of the rope shown only by outlines, and (b) of FIG. The arrows drawn along the imaginary lines of the omitted parts in (b) of FIG. Good extensibility or shrinkage.

The rope 11 can be used for various purposes, from thick and rigid to thin and flexible. The rope 11 is constructed by braiding a plurality of strands 12 made of twisted yarn of an appropriate material into a braid. The rope in the illustrated example has a 2×8=16 twist structure that is braided as a set of two. Moreover, the cross-sectional shape of the rope 11 is circular.

The rope 11 has a coarse pitch portion 13 in at least part of its longitudinal direction. A portion other than the coarse pitch portion 13 is a non-coarse pitch portion 15 .

As shown in FIG. 2A schematically showing the cross section of the coarse pitch portion 13, the coarse pitch portion 13 includes a hollow portion 31 at the central portion and a stitch portion leading from the outer peripheral surface to the hollow portion 31. 32. The stitch portion 32 is larger than the portion adjacent to the coarse pitch portion 13 in natural length, that is, the stitch 51 of the non-coarse pitch portion 15 .

The coarse pitch portion 13 is formed at a position appropriately shifted toward the middle of the length from the end of the rope 11, and the length of the coarse pitch portion 13 is also appropriately set. The length of the coarse pitch portion 13 is preferably formed longer. The coarse pitch portions 13 may be formed on only one longitudinal side of one rope, on both sides, or at a plurality of locations including an intermediate portion. The forming positions and the number of the ropes are appropriately determined according to the use of the rope.

The non-coarse pitch portion 15 has a non-hollow structure in which the axial center portion is dense in the natural length, as shown in FIG. Here, "dense" does not have a strict meaning but a relative meaning. In other words, it does not refer only to the state in which the strands 12 are in close contact with each other and there is no space at all. This also includes a state in which there is a relatively small space in the central portion. In this case, the size of the space is such that when the rope 11 is stretched and contracted, the strands 12 constituting the rope 11 cannot be greatly deformed and the expansion and contraction can be suppressed. It should be noted that the term “expansion” here means excluding expansion and contraction due to the material itself.

That is, as indicated by arrows in FIG. 1B, the non-coarse pitch portion 15 has a lower expansion ratio than the coarse pitch portion 13 . Since the coarse pitch portion 13 has the hollow portion 31 and the stitch portion 32 larger than the stitch 51 of the non-coarse pitch portion 15, the strand 12 has good deformability and is rich in elasticity and deformability. When the stitch portion 32 is stretched and closed, it is difficult to further deform unless the material itself has elasticity, so shrinkability is better than stretchability.

Further, when the coarse pitch portion 13 and the non-coarse pitch portion 15 are compared, the pitch at the time of knitting is different. , the non-coarse pitch portion 15 adjacent to the coarse pitch portion 13 has a different thickness. That is, the coarse pitch portion 13 is thicker than the non-coarse pitch portion 15 .

Specifically, the thickness φa of the coarse pitch portion 13 in its natural length state is 1.1 to 1.5 times the thickness φb of the non-coarse pitch portion 15 . For example, the thickness φa of the coarse pitch portion 13 is preferably about 1.25 times the thickness φb of the non-coarse pitch portion 15 . If the thickness difference is large, the appearance of the rope 11 is reduced, and in addition, when the coarse pitch portion 13 is contracted and the non-coarse pitch portion 15 of the rope 11 is tightened, the tightening force is increased. can be inadequate. Further, if the difference in thickness is small, the previously formed stitch portion 32 is small, so that the workability is poor when inserting the end portion of the non-coarse pitch portion 15 of the rope 11 .

The rope 11 configured as described above is manufactured as follows.

For manufacturing the rope 11, a lacing machine (not shown) having the same mechanism as the conventional one can be used. The string making machine operates as follows. That is, when strands are pulled out from a plurality of carriers on which bobbins are mounted, the carriers are moved along a predetermined path by rotation of gears provided below. Due to this movement, the positional relationship of the strands pulled out as the strands are sent out changes, and a round braided product (rope) is braided. The braid is taken up by a take-up roller and discharged.

In this rope manufacturing method, the coarse pitch portion 13 having a desired length is formed at a desired point in the course of the rope manufacturing of the non-coarse pitch portion 15 . The coarse pitch portion 13, that is, at least a part in the longitudinal direction, has a hollow portion 31 at the axial center portion and a stitch portion 32 leading from the outer peripheral surface to the hollow portion 31, and the stitch portion 32 has the stitches of the adjacent portion in the natural length. Coarse pitch portions 13 greater than 51 are formed by winding up the braid at a higher speed than when manufacturing non-coarse pitch portions 15 adjacent to coarse pitch portions 13 .

Specifically, in the case of using a lacing machine that moves the carrier, pulls out the yarn, and winds up the braided product with a single motor, first, the lacing operation of the dense non-coarse pitch portion 15 as described above is performed. to start. Subsequently, the operation of the braiding machine is temporarily stopped at a predetermined time thereafter, and the gear that is transmitted to the winding roller is changed so as to increase the winding speed. After the gear change, continue the stringing operation. Driving at a higher winding speed than before is performed for a period of time corresponding to the length of the coarse pitch portion 13 to be obtained, after which the operation of the cord making machine is stopped again to adjust the winding speed. and then restart the drive of the string making machine. As a result, the rope 11 partially having the coarse pitch portion 13 is manufactured.

When the rope 11 is manufactured in this way, it is necessary to stop the driving of the rope making machine and change the winding gear as described above, so it is not suitable for mass production.

Therefore, as shown in the schematic configuration diagram of FIG. 3, it is preferable to use a cord making machine 17 in which a winding motor is provided separately from a motor for moving a carrier from which the thread (strand 12) as a material is drawn.

The string making machine 17 is provided with a carrier motor 73 as a motor for moving the carrier 71 on a horizontal plate 72 on which the carrier 71 is movably provided in the lower part of the device. A guide 74 at a position where the strand 12 pulled out from the carrier 71 converges, and a winding roller 75 above the guide 74 are provided in the upper part of the device. Rotation of the take-up roller 75 draws out the thread and winds up the braid. A shaft 76 of the winding roller 75 is provided with a pitch adjusting motor 79 as a motor for winding up via a pulley 77 and a pulley belt 78 . The carrier motor 73 and the pitch adjustment motor 79 are driven and controlled by a control unit (not shown).

In order to manufacture the rope 11 using such a string making machine 17, the carrier motor 73 and the pitch adjusting motor 79 are driven at a predetermined number of revolutions under the control of the control unit. Knitting of the dense non-coarse pitch portion 15 as described above is started. At an appropriate time after this, the control section changes the rotational speed of the pitch adjusting motor 79 to a predetermined higher speed than before, while keeping the rotational speed of the carrier motor 73 as it is. This causes the braid to roll up faster and the pitch of the braid coarser. As a result, the coarse pitch portion 13 having the hollow portion 31 and the stitch portion 32 described above and having a larger thickness than the portion (the non-coarse pitch portion 15) before the pitch change is formed.

After the desired length of the coarse pitch portion 13 is formed, the control unit returns the pitch of the pitch adjustment motor 79 to its original pitch. As a result, the non-coarse pitch portion 15 is continuously formed. When the coarse pitch portion 13 is to be formed, the controller changes the rotational speed of the pitch adjusting motor 79 again. In this manner, the rope 11 is continuously manufactured without stopping the operation of the rope making machine 17. - 特許庁

The rope 11 manufactured as described above is processed as follows.

As shown in FIG. 4(a), the rope 11 having a non-coarse pitch portion 15, a coarse pitch portion 13, and a non-coarse pitch portion 15 in order on one end side in the longitudinal direction is indicated by an arrow A. One end 11 a , which is the non-coarse pitch portion 15 as shown, is inserted into the coarse pitch portion 13 . The insertion is performed for a desired length along the longitudinal direction of the coarse pitch portion 13 from one end side of the coarse pitch portion 13 . When tension is applied to one end that has been inserted and looped, a loop 11b can be formed at one end of the rope 11 as shown in FIG. 4(b). One end 11a of the rope 11 may be either in a state of being housed in the coarse pitch portion 13 or in a state of protruding from the coarse pitch portion 13 . The size of the annular portion 11b can be appropriately set, and it is also possible to change the size.

As indicated by arrow B in FIG. 4(a), one end 11a, which is the non-coarse pitch portion 15, can also be inserted from the other end side of the coarse pitch portion 13. As shown in FIG. When a desired length is inserted into the coarse pitch portion 13 and a tension is applied to the annular end portion, an annular portion 11c is formed at the one end portion of the rope 11 as shown in FIG. 4(c). One end 11a of the rope 11 may be either in a state of being housed in the coarse pitch portion 13 or in a state of protruding from the coarse pitch portion 13 . Also in this case, the size of the annular portion 11b can be appropriately set, and it is also possible to change the size.

One end of the rope 11 inserted into the coarse pitch portion 13 is tightened and fixed by the contracting coarse pitch portion 13 . Since the non-coarse pitch portion 15 at one end of the rope 11 has poor stretchability, it is strongly tightened and firmly fixed.

Further, since the coarse pitch portion 13 has the hollow portion 31 and the mesh portion 32, the work of inserting the one end 11a of the rope 11 is easy. Moreover, the range to be inserted due to the presence of the stitch portion 32 can be easily recognized, and the workability is good.

When inserting the end 11a of the rope 11 into the coarse pitch portion 13, it is preferable to use a jig 18 as shown in FIG. The jig 18 has a configuration in which a tip portion 82 having a gently sharpened shape is provided at the tip of a cylindrical main body portion 81 . An oblique inclined end 83 is formed at the rear end of the body portion 81 .

The length of the main body portion 81 is set longer than the length of the coarse pitch portion 13 in the normal state. The thickness of the body portion 81 is such that one end 11a of the rope 11 to be processed can be tightly inserted. The thickness of the tip of the tip portion 82 is such that it can be easily inserted into the stitch portion 32 of the coarse pitch portion 13 in the normal state.

During processing, one end 11a of the rope 11 is inserted from the rear end of the body portion 81 of the jig 18 and held. Appropriate means such as anti-slip means may be provided on the main body 81 or one end 11a of the rope 11 for holding.

The jig 18 holding one end 11a of the rope 11 is pushed out or pulled out from a desired position by inserting the tip portion 82 into an appropriate position of the coarse pitch portion 13 . One end 11a of the rope 11 is removed from the jig 18 after coming out of the coarse pitch portion 13 or in a state of being housed in an appropriate position inside the coarse pitch portion 13 .

As described above, the difference between the thickness of the coarse pitch portion 13 and the thickness of the non-coarse pitch portion 15 is slight. may be marked with a mark 19. The mark 19 can be formed of, for example, an appropriate adhesive tape or the like. By the mark 19, the range of the coarse pitch portion 13 can be recognized very easily, and workability is good.

The above configuration is one form for carrying out the present invention, and the present invention is not limited to the configuration described above, and other configurations can be adopted.

For example, the difference in braid pitch is not limited to the two types of coarse pitch portion 13 and non-coarse pitch portion 15, but a plurality of types of coarse pitch portion 13 may be provided.

Further, the rope 11 can be processed variously according to the application other than that illustrated in FIG.

DESCRIPTION OF SYMBOLS 11... Rope 12... Strand 13... Coarse pitch part 15... Non-coarse pitch part 17... String making machine 31... Hollow part 32... Stitch part 51... Stitch 71... Carrier 73... Motor for carrier 79... Pitch adjustment motor

Claims (6)

A rope braided into a braid,
Formed at least partially in the longitudinal direction is a coarse pitch portion having an axial hollow portion and a mesh portion leading from the outer peripheral surface to the hollow portion,
The rope, wherein the stitch portion is larger in natural length than the stitches of the portion adjacent to the coarse pitch portion. 2. The rope according to claim 1, wherein a portion other than said coarse pitch portion has a lower expansion ratio than said coarse pitch portion. 2. The rope according to claim 1, wherein the portion other than the rough pitch portion has a non-hollow structure in which the axial center portion is dense in the natural length. 4. The thickness of the coarse pitch portion in its natural length state is 1.1 to 1.5 times the thickness of the portion adjacent to the coarse pitch portion. Rope described in . A method for manufacturing a rope braided into a braid,
A coarse-pitch portion having, in at least a part of the longitudinal direction, a hollow portion of an axial center portion and a stitch portion leading from the outer peripheral surface to the hollow portion, the stitch portion being larger in natural length than the stitches of adjacent portions, A rope manufacturing method in which a braided product is wound up at a higher speed than when manufacturing a portion adjacent to the coarse pitch portion. The motor for winding is provided separately from the motor for moving the carrier from which the yarn as the material is drawn,
6. The method of manufacturing a rope according to claim 5, wherein the speed of the winding motor is changed.

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