JP4475673B2 - Wire saw connection sleeve and wire saw - Google Patents

Description

  The present invention is a wire saw for cutting stone, concrete, and the like. When cutting, the connecting sleeve for connecting both ends of the wire saw to make an endless wire saw and the connecting sleeve are endless. It relates to a connected wire saw.

  Wire saws are used for cutting raw stones and for demolition of concrete structures. In this wire saw, a number of beads called superabrasive layers provided on the outer periphery of a cylindrical base metal are passed through a wire rope and fixed at intervals. As a method of fixing the beads to the wire rope, a covering member is formed on the outer periphery of the wire rope or around the bead and fixed by adhesion to the covering member, or the bead base metal is caulked mechanically to the wire rope. There are ways to fix, but each has advantages and disadvantages. The method of bonding with the covering member rarely damages the wire rope, and can reduce the trouble of breaking due to the damage, but the strength to fix the beads to the wire rope may be insufficient, especially for use. If the covering member is worn or cracked during the stacking, the strength for fixing the beads is lowered, and the beads may move. On the other hand, in the method of caulking and fixing the bead base, the strength of fixing the bead to the wire rope is high, but since the shape of the wire rope is deformed by caulking, the caulking force is applied to the wire rope, Repeated use tends to cause a problem that the strength of the wire rope tends to decrease due to repeated bending.

  By the way, these wire saws are wound around an object to be cut to be endless and used by being wound around a pulley provided in a cutting machine. At the time of cutting, tension is applied to the wire saw by pulling the pulley, and when the pulley is rotated in this state, the wire saw runs and the object to be cut is cut. In such cutting, the size of the object to be cut varies, and the length of the wire saw to be used is not constant. Therefore, it is necessary to use the wire saw after cutting it to a required length, connecting both ends, and making it endless. As this connection method, the wire ropes at both ends of the wire saw are exposed, the wire ropes at both ends exposed on the cylindrical sleeve are inserted, and the sleeve is caulked using a high-pressure press.

  The connection part using such a sleeve is significantly lower in strength than the breaking strength of the wire rope, and when the wire saw is caught by an object to be cut during cutting, a sudden tension is applied to the wire saw. The wire rope at the end of the wire saw may come off from the sleeve. In addition, when the rubber removal on the surface of the wire rope is insufficient at the time of connection, the situation becomes even easier. At this time, there is little problem if the sleeve is removed from only one end of the wire saw and remains on the other, but if the sleeve comes out of the rear wire saw and attaches to the front wire saw, the front side The wire saw may fly in an unexpected direction due to the momentum of travel, and the sleeve may come out of the wire saw on the front side and scatter alone, making it extremely dangerous. The part where the wire saw is traveling is provided with a protective net, so the possibility of the wire saw scattering is very low, but if it is only a sleeve, it will scatter from the gap of the protective net etc. There is a fear, and the risk increases greatly.

As a solution to this problem, when the wire rope is pulled out of the sleeve, there is a difference in the caulking strength before and after the sleeve. There is a wire saw having a connection structure in which the sleeve is left on the wire saw on the rear side of the sleeve, using the sleeve as described above, with the front side in the running direction of the sleeve as a side having a weak caulking force. As an example, as shown in FIG. 5, there is a wire saw in which a groove such as a female thread is provided on one side of the inner surface of the hole of the sleeve and connected by a sleeve having a difference in caulking strength before and after (for example, Patent Document 1).
There is also a sleeve that has a difference in caulking strength by making a difference in outer diameter before and after the sleeve (see, for example, Patent Document 2).
Japanese Patent No. 270083 (FIG. 2) Japanese Patent Laying-Open No. 2003-260651 (FIG. 2)

  When using a sleeve having a difference in caulking strength before and after the traveling direction as described above, it is often connected so as to increase the caulking strength on the rear side in the traveling direction as described above. This is also due to the reasons described above, but in addition to this, when considering the force applied to the wire saw during cutting, the force is applied sequentially from the front side to the rear side in the running direction. One of the reasons is that the force is applied to the front wire saw first, so by keeping the caulking strength of the wire rope on the front side low, the sleeve will surely remain on the wire saw on the rear side in the running direction. One. Therefore, from the viewpoint of preventing the sleeve from scattering, it can be said that the safest usage is to increase the caulking strength on the rear side in the traveling direction.

However, when the wire saw on the front side in the running direction of the sleeve is pulled out, the wire saw in this portion is subjected to very large force and scattered. At this time, the beads (in other words, the beads immediately in front of the connection sleeve) fixed to the rearmost portion of the wire saw may be scattered. The reason for this is that the covering member at the end of the wire saw is removed to caulk the connection sleeve, and the wire rope is exposed, so that the holding force of the beads at the end is reduced. Conventionally, only the adhesive strength of the covering member is used to hold the beads. Even if the covering member on the back side of the bead is shaved with a cutter knife or the like to expose the wire rope, the bead itself adheres to the covering member around the bead. Since it is held by force, the problem that the beads at the end are scattered hardly occurred. Recently, however, wire saws in which coil springs are provided between the beads and a covering member is provided around the coil springs and wire ropes are becoming mainstream in order to prevent the beads from being displaced along the wire ropes. When connecting a wire saw having this coil spring, it will be removed because there is also a coil spring at the end of the wire saw, but when the coil spring is removed, the surrounding covering member is removed together with the coil spring adhered. For this reason, the covering member around the bead at the end and a part of the covering member in the gap between the inner surface of the bead and the wire rope may be removed, and the holding power of the bead is greatly reduced. .
In the type of wire saw in which the base metal of the beads is caulked and fixed to the wire rope, even if there is no covering member, the holding power of the beads is high at the initial stage of use, but the holding power will be increased while bending is repeated and bending stress is applied. Since it gradually decreases, the holding power is reduced, even if not as much as the type of wire saw fixed to the wire rope only by the adhesive force of the covering member, and beads of any type can be scattered Increases nature. When the beads are scattered, the risk is still high although it is not as high as when the sleeves are scattered, and the operator may be injured.

  As described above, the present invention provides a highly safe wire saw connection sleeve and wire saw in which beads at the end of the wire saw do not scatter even when the wire rope comes out of the sleeve. .

A first feature of the wire saw connecting sleeve of the present invention is a sleeve for connecting a wire saw endlessly,
The sleeve has a cylindrical shape and a large-diameter hole portion with a relatively large hole diameter on the front side in the running direction and a small-diameter hole portion with a relatively small hole diameter on the rear side in the running direction when used by connecting to a wire saw. A main sleeve having
A cylindrical auxiliary sleeve provided inside the large-diameter hole of the main sleeve,
The length of the large diameter hole of the main sleeve is 1/3 or less of the length of the main sleeve.

  By adopting such a structure, a part of the small diameter hole of the auxiliary sleeve and the main sleeve is fixed to the wire rope on the front side with respect to the wire saw traveling direction of the sleeve, and on the rear side with respect to the wire saw traveling direction. Most of the small-diameter hole of the main sleeve is fixed to a certain wire rope. Therefore, the force for fixing the wire saw endlessly is due to the force of the portion where the main sleeve is fixed and the frictional force between the large-diameter hole of the main sleeve and the auxiliary sleeve. Since this frictional force is much smaller than the force with which the main sleeve is fixed to the wire rope, the fixing force of the wire rope on the front side with respect to the wire saw traveling direction is higher than the fixing force of the wire rope on the rear side. If a large force is applied while cutting the wire saw, the wire rope on the front side in the running direction will come out of the main sleeve and remain on the wire rope on the back side in the running direction. Disappears. In addition, since the auxiliary sleeve remains on the wire rope on the front side in the traveling direction, it is possible to prevent the beads immediately in front of the connecting sleeve from scattering. In addition, since the auxiliary sleeve can be provided within the range of the length of the main sleeve, it is possible to prevent troubles such that the length of the connecting portion is not increased and the sleeve is easily worn during cutting. Furthermore, it is only necessary to insert the wire ropes of the front and rear wire saws in the running direction into the connection sleeve by the same length, and the direction in which the connection sleeve is fixed can be easily identified, so workability in the field Will improve.

  A second feature is that a groove is formed in at least a part of the inner surface of the small diameter hole portion of the main sleeve and the inner surface of the hole of the auxiliary sleeve.

  By doing so, the strength at which the main sleeve and the auxiliary sleeve are fixed to the wire rope is higher, and the difference in frictional force between the large-diameter hole of the main sleeve and the outer diameter of the auxiliary sleeve is larger. Therefore, when connecting the wire saw with the sleeve of the present invention, it is possible to clearly provide a difference in the fixing force between the front side and the rear side in the running direction, and more reliably prevent the sleeve from scattering alone. Is possible. The groove is preferably formed by forming a female thread or bee-wound groove on the small diameter hole of the main sleeve or the entire inner peripheral surface of the auxiliary sleeve, but it is easy to process the groove. It is more preferable to use a female screw. Further, the same effect can be obtained by increasing the surface roughness of the inner peripheral surface without forming a groove.

  A third feature is that the groove formed in the main sleeve is formed over a length of 1/2 or more of the small diameter hole portion of the main sleeve on the rear side in the running direction.

  By doing so, the strength with which the main sleeve is fixed to the wire rope is such that the holding force of the wire saw that is held on the rear side in the running direction of the sleeve becomes larger, and the wire saw that is held on the front side in the running direction of the sleeve Since the difference from the force is easily increased, the sleeve can be left on the wire saw on the rear side in the traveling direction of the sleeve more reliably when the wire rope is pulled out. It should be noted that an absolute holding force is reduced when a groove is provided in a part of the inner surface of the small diameter hole portion of the main sleeve as compared with a case where a groove is provided as a whole. Therefore, it is preferable to use properly according to the magnitude | size of the output of the power of a cutting device, cutting conditions, a cutting method, a cutting condition, etc.

  The fourth feature is that the hole diameter of the small-diameter hole portion of the main sleeve is the same as the hole diameter of the auxiliary sleeve.

  In this way, when the sleeve is caulked, the position of the sleeve is stably determined with respect to the wire rope, and in particular, troubles such that the axial centers of the two are shifted are unlikely to occur. In addition, the same diameter said here means the case where it is in the range of the tolerance on manufacture.

  The fifth feature is that the hole diameter of the large-diameter hole portion of the main sleeve is the same as the outer diameter of the auxiliary sleeve or is 0.2 mm larger than the outer diameter of the auxiliary sleeve.

  In this way, by setting the hole diameter of the large-diameter hole portion of the main sleeve and the outer diameter of the auxiliary sleeve substantially the same, the wire rope can be inserted while the auxiliary sleeve is fitted into the main sleeve. Therefore, workability on site is improved. In addition, when the sleeve is caulked and fixed, the shape of the large diameter hole of the main sleeve and the shape of the outer diameter of the auxiliary sleeve are almost the same, and the frictional force between the two after caulking is difficult to increase. When the wire saw is connected with the sleeve of the invention, a difference in fixing force between the front side and the rear side in the traveling direction can be clearly provided, and it becomes possible to more reliably prevent the sleeve from scattering alone. . In particular, if the hole diameter of the large-diameter hole portion of the main sleeve is made the same as the outer diameter of the auxiliary sleeve so that they can be fitted to each other only by the difference in tolerance, this effect becomes even greater.

  The first feature of the wire saw of the present invention is that the wire saw is connected endlessly by the wire saw connecting sleeve as described above.

  By making such a wire saw, even if a sudden force is applied to the wire saw during use and the connection sleeve may come off from the wire rope, the sleeve is prevented from flying alone, Since some beads are prevented from being scattered, a safe wire saw can be obtained.

  The second feature is that the length of the wire rope inserted on the front side in the running direction of the sleeve and the length of the wire rope inserted on the rear side are the same.

  In this way, it is possible to clearly provide a difference in fixing strength between the wire rope inserted on the front side of the sleeve in the running direction and the wire rope inserted on the rear side, and the wire saw runs when the sleeve comes off. The sleeve is securely left on the wire rope on the rear side of the direction, and safety is improved.

  According to the wire saw connecting sleeve of the present invention, workability when inserting or caulking the wire rope at the end of the wire saw into the sleeve is improved, and the orientation of the connecting member can be easily determined. Even if the connection sleeve is pulled out of the wire rope due to a sudden force applied to the wire saw, the sleeve does not fly alone, and even if the wire saw on the front side of the sleeve travels, the bead at the end Will not be scattered alone.

  In addition, according to the wire saw of the present invention, even when the wire saw comes out of the sleeve during use and the wire saw on the front side in the wire saw traveling direction of the sleeve is scattered, the beads at the end are not scattered alone, Safety is improved. In addition, since the sleeve remains bonded to the wire rope on the rear side in the wire saw traveling direction, the safety is further improved.

  An example of a wire saw made endless by the wire saw connection sleeve of the present invention is shown in FIG. 1, and a partially enlarged view of the connection portion is shown in FIG. FIG. 1 shows the appearance around the connection portion and the cross section of the sleeve portion, and the other portions are indicated by dotted lines with the shapes omitted. Further, FIG. 2 shows a cross section of only the connection portion (sleeve portion), and the other portions show the appearance. Referring to FIG. 1, in a wire saw 1, a bead 2 having a superabrasive layer provided on the outer periphery of a cylindrical base metal (not shown) is passed through a wire rope 4, and only a covering member 3 is spaced apart. It is fixed by. Since both ends of the wire saw 1 are connected by a sleeve, the covering member at one end 1a and the other end 1b is removed and the wire rope 4 is exposed, and is inserted into the holes of the main sleeve 5 and the auxiliary sleeve 6. Yes. The main sleeve 5 is cylindrical and has a large-diameter hole portion 5a having a relatively large hole diameter on the front side in the traveling direction, and a small-diameter hole portion 5b having a relatively small hole diameter on the rear side in the traveling direction. Yes. A cylindrical auxiliary sleeve 6 is provided inside the large-diameter hole 5 a and is fixed to the wire rope 4 on the one end 1 a side of the wire saw 1. The auxiliary sleeve 6 is caulked together with the main sleeve 5 by a high pressure pump and fixed to the wire rope 4. Although the main sleeve 5 and the auxiliary sleeve 6 have a cylindrical shape, the shape is not necessarily maintained after caulking, and the cross section may be a hexagonal shape depending on the caulking die shape.

Referring to FIG. 2, of the one end 1 a of the wire saw 1, the length L ₁ + L ₂ inserted into the main sleeve 5 and the auxiliary sleeve 6 is the length L ₃ at which the other end 1 b is inserted into the main sleeve 5. It is almost the same length. The lengths of both are preferably the same, but there may be a difference of 2 mm at the maximum. The diameter of the auxiliary sleeve 6 before caulking is the same as the diameter of the large-diameter hole portion of the main sleeve 5 throughout, and is caulked simultaneously when caulking the main sleeve 5. Further, the hole diameter before caulking of the auxiliary sleeve 6 is the same as the hole diameter of the small-diameter hole portion of the main sleeve 5 and the material is the same as that of the main sleeve 5. The length from which the covering member 3 at one end 1a of the wire saw 1 is removed is the same length as the length L ₁ + L ₂ inserted into the main sleeve 5 and the auxiliary sleeve 6. 1/2 of the length L. The auxiliary sleeve 6 is not necessarily made of the same material as the main sleeve 5. The length M of the auxiliary sleeve 6 can hold the beads 2 on the front side in the traveling direction, and can be strong enough to prevent the main sleeve from coming out of the one end 1a even when the main sleeve is pulled out from the one end 1a of the wire rope 4. Since it is good, it is preferable to set it as 2 mm or more. If it is less than 2 mm, there is a possibility that the auxiliary sleeve 6 may break when it is caulked, or the fixing force to the wire rope 4 may be insufficient. Moreover, it is preferable to set it as 1/3 or less of the sleeve full length L. If longer than this, the one end 1a of the wire saw 1 insufficient fixing strength since the length L ₂ is shorter portion for fixing the main sleeve 5, connections when sudden force is applied to the wire saw 1 sleeve Is easy to come off.

FIG. 3 is a diagram illustrating a second example of the connection portion of the wire saw 1. Most of them are the same as those shown in FIG. 2, but use is made of the main sleeve 5 in which the whole small-diameter hole portion 5b and the whole inner peripheral surface portion of the auxiliary sleeve 6 are formed with female thread-like grooves 5c. The point is different. Of the one end 1 a of the wire saw 1, the length L ₁ + L ₂ inserted into the main sleeve 5 is the same length as the length L _{3 at} which the other end 1 b is inserted into the main sleeve 5 and the auxiliary sleeve 6. Each length is ½ of the length L of the main sleeve 5. As in FIG. 2, a large-diameter hole portion 5a having a relatively large hole diameter is provided on the front side of the main sleeve 5 in the traveling direction, and an auxiliary sleeve 6 is provided inside the large-diameter hole portion 5a. It is provided and is fixed to the wire rope 4 on the one end 1 a side of the wire saw 1. In all the drawings, the arrow R indicates the traveling direction of the wire saw 1.

FIG. 4 is a diagram illustrating a third example of the connection portion of the wire saw 1. Most of them are the same as those shown in FIG. 3, but a female thread-like groove 5c is formed only on the rear side in the running direction of the small-diameter hole 5b of the main sleeve 5 and on the entire inner peripheral surface of the hole of the auxiliary sleeve 6. It is different in using things. The length of the portion provided with the groove 5c of the main sleeve 5 is half of the length of the total length L of the main sleeve 5 (the length of the FIG. 4, L _3). Of the one end 1 a of the wire saw 1, the length L ₁ + L ₂ inserted into the main sleeve 5 is the same length as the length L _{3 at} which the other end 1 b is inserted into the main sleeve 5 and the auxiliary sleeve 6. Each length is ½ of the length L of the main sleeve 5. 2 and 3, a large-diameter hole portion 5a having a relatively large hole diameter is provided on the front side of the main sleeve 5 in the running direction, and an auxiliary portion is provided inside the large-diameter hole portion 5a. A sleeve 6 is provided and fixed to the wire rope 4 on the one end 1 a side of the wire saw 1. In this example, the force with which the main sleeve 5 holds the one end 1a of the wire saw 1 is lower than that in FIG. Therefore, the difference between the force with which the main sleeve 5 holds the one end 1a of the wire saw 1 and the force with which the other end 1b is held becomes larger, and the absolute holding force becomes smaller than that in FIG. Therefore, it may not be suitable when the power output of the cutting device that needs to increase the absolute holding force is large, but is effective when the power output of the cutting device is small.

  FIG. 8 is a diagram illustrating a part of an example of a method for connecting the wire saw 1. In order to connect, first, the covering member 3 of the ends 1a and 1b of the wire saw 1 is removed, and the wire rope 4 is exposed. Then, the exposed wire rope 4 is inserted into the main sleeve 5 and the auxiliary sleeve 6. At this time, the one end 1a is inserted so that the auxiliary sleeve 6 is on the front side of the main sleeve 5 in the traveling direction. Next, as shown in FIG. 8A, approximately half the length of the main sleeve 5 is crimped by a crimping mold 10 and crimped. Thereafter, the remaining part of the main sleeve 5 is crimped by a crimping mold 10 and crimped. In this example, as shown in FIG. 8C, the cross-sectional shape after caulking is hexagonal so that the cross-section of the caulking mold 10 is concave, so that the main caulking is performed as described above. The sleeve 5 and the auxiliary sleeve 6 are rotated about 60 degrees around the axis, and are crimped again by the caulking die 10.

As the wire saw of the present invention, a wire saw having the connection structure shown in FIG. 3 was manufactured, and a strength test was performed. For comparison, a wire saw having a connection structure shown in FIG. 5 was manufactured as a conventional wire saw. As the wire rope 4, a steel wire rope having a diameter of 4.76 mm was used, and a wire saw using a vulcanized rubber having a JISA hardness of 85 as the covering member 3 was prepared. As the sleeve of the present invention, the auxiliary sleeve 6 is a cylindrical sleeve having a diameter of 7.5 mm (tolerance is +0 mm, −0.5 mm), a hole diameter of 5.16 mm, and a length M of 2.5 mm. 5 is a diameter of 9.3 mm, a diameter of a small diameter hole is 5.16 mm, a diameter of a large diameter hole is 7.5 mm (tolerance is +0.5 mm, −0 mm), a length L is 20 mm, and a length L _{1 of the} large diameter hole portion. Used was a 2.5 mm cylindrical shape with a stepped hole. A female thread-like groove 5c is formed on the small diameter hole portion of the main sleeve 5 and the inner peripheral surface of the auxiliary sleeve 6 throughout. Further, as a conventional sleeve, a cylindrical sleeve having a diameter of 9.3 mm, a hole diameter of 5.16 mm, and a length of 20 mm is used, and a female screw is provided over a length of 10 mm from one end to the center of the inner peripheral surface of the hole of the sleeve 5. A groove 5c was formed.

  In this example, the beads 2 and the covering member 3 were formed over about 100 mm on one side of the wire rope 4 having a length of about 200 mm in order to obtain a wire saw for a strength test. Then, two such test wire saws were connected using the main sleeve 5 and the auxiliary sleeve 6. The connection method was performed as follows. At one end 1a and the other end 1b of the wire saw 1, the covering member 3 was removed over a length of 10 mm to expose the wire rope 4. In the wire saw of the present invention, the auxiliary sleeve 6 is fitted into the large-diameter hole 5 a of the main sleeve 5, the one end 1 a of the wire rope 4 is inserted into the side where the auxiliary sleeve 6 is provided, and the other end 1 b is connected to the main sleeve 5. It was made to insert in the small diameter hole 5b side. Thereafter, the main sleeve 5 and the auxiliary sleeve 6 were sandwiched between caulking dies attached to a high-pressure press, and pressed and pressure-bonded. In the conventional wire saw, one end 1a of the wire rope 4 is inserted on the side where the female thread-like groove 5c of the sleeve 5 is not provided, and the other end 1b of the wire rope 4 is inserted on the side where the female thread-like groove 5c is provided. . Thereafter, the sleeve 5 was sandwiched between caulking dies attached to a high-pressure press, and pressure was applied for pressure bonding.

  The test wire saw manufactured as described above was attached to a universal testing machine, and a tensile test was performed. A schematic diagram of the test method is shown in FIGS.

  First, as a first test, as shown in FIG. 6, the portion of about 100 mm, which was not formed with the beads 2 and the covering member 3 but remained only the wire rope 4, was sandwiched and fixed by a fixing part of a universal testing machine. At this time, the sleeve was fixed so that the side on which the auxiliary sleeve 6 was provided was on the upper side. Then, the upper fixed portion was pulled upward, and the load at which the main sleeve 5 was removed from one end 1a of the wire saw 1 was measured by sequentially increasing the tensile load.

  Next, as a second test, as shown in FIG. 7, the wire rope 4 is fixed as it is to the upper fixing portion, and the lower fixing portion is just above one end 1a from which the main sleeve 5 has come off. Bead 2 was fixed. Then, the upper fixed part was pulled upward, and the tensile load was sequentially increased to measure the load at which the beads 2 were removed from the one end 1a of the wire saw 1.

  Further, as a third test, the same method as shown in FIG. 7 is used to measure the load at which the main sleeve 5 comes off from the other end 1b of the wire saw 1 where the main sleeve 5 remains on the wire rope 4. To fix the jig in which the main sleeve 5 is hooked to the upper fixing part, and the lower fixing part is fixed by sandwiching only the wire rope 4 where the beads 2 and the covering member 3 are not formed. did.

  The results of conducting the above three types of tensile tests for each of the five were as follows.

  In the wire saw of the present invention, the load from which the main sleeve 5 was removed in the first test was 750 to 820 kgf and the average value was 778 kgf, and the load from which the beads 2 were removed in the second test was 470 to 515 kgf and the average value was It was 501 kgf. On the other hand, in the conventional wire saw, the load from which the main sleeve 5 was removed in the first test was 680 to 800 kgf and the average value was 742 kgf, and the load from which the beads 2 were removed in the second test was 80 to 110 kgf. The average value was 100 kgf. Furthermore, the load that the main sleeve 5 comes off from the other end 1b of the wire saw 1 in which the main sleeve 5 remains in the wire rope 4 in the third test is an average value of 950 to 1075 kgf for the wire saw of the present invention. The conventional wire saw was 950 to 1050 kgf, and the average value was 985 kgf.

  From the above results, it was obvious that there was no significant difference in the load that the main sleeve 5 came out, but it was confirmed that the fixing strength of the wire rope 4 was lower in the front side of the main sleeve 5 in the traveling direction. It was found that the fixing strength of the beads 2 was greatly different, and the wire saw of the present invention was found to be safer.

  The sleeve for wire saw connection and the wire saw of the present invention can be used for various types of wire saws connected by a sleeve.

It is a schematic explanatory drawing which shows the connection part periphery of the wire saw of this invention. It is a schematic explanatory drawing which shows the example of the connection part of the wire saw of this invention. It is a schematic explanatory drawing which shows the 2nd example of the connection part of the wire saw of this invention. It is a schematic explanatory drawing which shows the 3rd example of the connection part of the wire saw of this invention. It is a schematic explanatory drawing which shows the example of the connection part of the conventional wire saw. It is a schematic explanatory drawing which shows the method of the tension test in an Example. It is a schematic explanatory drawing which shows the method of the tension test in an Example. It is a schematic explanatory drawing which shows the example of the connection method of the wire saw of this invention, (a) And (b) is a front view, (c) is AA sectional drawing of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire saw 1a One end of a wire saw 1b The other end of a wire saw 2 Bead 3 Cover member 4 Wire rope 5 Main sleeve 5a Large diameter hole part 5b Small diameter hole part 5c Groove 6 Bead support member 7 Test machine fixing part 10 Caulking die

Claims (7)

A sleeve for connecting a wire saw endlessly,
The sleeve has a cylindrical shape and a large-diameter hole portion with a relatively large hole diameter on the front side in the running direction and a small-diameter hole portion with a relatively small hole diameter on the rear side in the running direction when used by connecting to a wire saw. A main sleeve having
A cylindrical auxiliary sleeve provided inside the large-diameter hole of the main sleeve,
The length of the large diameter hole of the main sleeve is 1/3 or less of the length of the main sleeve.   The wire saw connection sleeve according to claim 1, wherein a groove is formed in at least a part of a hole inner surface of the small diameter hole portion of the main sleeve and a hole inner surface of the auxiliary sleeve.   3. The wire according to claim 1, wherein the groove formed in the main sleeve is formed over a length of ½ or more of the small-diameter hole portion of the main sleeve on the rear side in the running direction. Saw connection sleeve.   The wire saw connection sleeve according to any one of claims 1 to 3, wherein a hole diameter of the small diameter hole portion of the main sleeve is the same as a hole diameter of the auxiliary sleeve.   The hole diameter of the large-diameter hole portion of the main sleeve is the same as the outer diameter of the auxiliary sleeve, or is 0.2 mm larger than the outer diameter of the auxiliary sleeve at a maximum. A sleeve for connecting a wire saw as described in 1.   A wire saw connected endlessly by the wire saw connection sleeve according to any one of claims 1 to 5.   The wire saw according to claim 6, wherein the length of the wire rope inserted on the front side in the running direction of the sleeve and the length of the wire rope inserted on the rear side are the same.

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