JP6691858B2 - Connection sleeve - Google Patents

Description

  The present invention relates to a connecting sleeve, and more particularly to a connecting sleeve for connecting both ends of a wire saw to each other to make the wire saw endless.

  BACKGROUND ART Conventionally, a method of cutting a pillar, a wall, or the like formed of concrete or stone material for dismantling or the like has been performed using a wire saw provided with a plurality of diamond beads at appropriate intervals.

  This wire saw is used by connecting both ends so as to have an endless shape by using metal connection sleeves. This connecting sleeve part has a weaker connecting force between the connecting sleeve and the end of the wire saw than the strength of the other parts of the wire saw, so that the wire saw does not get caught on an object to be cut during cutting. If a sudden pulling force acts on the wire saw, the connection sleeve and the end of the wire saw may be disconnected.

  Of the connections between the connection sleeve and the wire saw, there are few problems if the front side in the traveling direction of the wire saw comes off. The sleeve also moves, and at this time, if the wire saw comes off the connecting sleeve, the connecting sleeve alone may fly in an unpredictable direction.

  Therefore, among the connections between the connection sleeve and the wire saw, a spiral groove is formed on the inner surface on the rear side in the traveling direction of the wire saw, and the connection force between the end portions of the connection sleeve and the wire saw is changed. It is known that the rear side is made higher than the front side in the traveling direction so that the front side can be easily pulled out (see Patent Document 1).

Japanese Patent No. 2700973

  In order to connect the conventional connecting sleeve and the end of the wire saw, an operator removes the resin layers at both ends of the wire saw by a predetermined length, and removes both ends of the resin layer in the connecting sleeve. The wire saw and the connection sleeve are connected to each other by inserting the connection holes from both ends into connection holes having both ends opened, and then caulking the connection sleeve.

  In this connection work, the operator removes the resin layers from both ends of the wire saw, and inserts both ends of the wire saw from both ends into connection holes formed with the same diameter over the entire axial direction of the connection sleeve. Therefore, the length of the wire saw inserted into the connection hole of the connection sleeve may differ between the front side and the rear side, and may also differ for each connection work.

  Therefore, in the connection between the connection sleeve and the wire saw, when the length inserted from the front side in the traveling direction of the wire saw is longer than the length inserted from the rear side, the rear side may be more easily removed than the front side. There is a risk that the connection sleeve may come off from the wire saw and scatter at that time.

  Then, this invention aims at proposing the connection sleeve which solved the said problem.

In order to solve the above problems, the present invention is a connection sleeve for connecting a wire saw to an endless shape by connecting both ends thereof,
The connection sleeve is formed into a cylindrical shape having connection holes with both ends opened in the axial direction ,
Wherein the central portion in the axial direction in the connection hole, a positioning portion protruding from the inner peripheral surface of the connecting hole to the axis side is formed,
On the outer peripheral surface of the connection sleeve, a taper whose diameter increases from the end toward the main body on the running direction side when the wire saw is used.
It is characterized in that a surface is formed .

Further, the outer diameter of the connection sleeve other than the tapered surface may be formed to be the same throughout the axial direction.

  The connection sleeve of the present invention is provided with a positioning portion projecting from the inner peripheral surface of the connection hole to the axial core side at the central portion in the axial direction of the connection hole, whereby one end and the other end of the wire saw are provided. It is possible to make the respective insertion amounts into the connection holes at the above-mentioned substantially constant. Therefore, it is possible to reduce the variation in the insertion amount for each work, it is possible to connect the wire saw and the connection sleeve with a fixed connection force that is set, and the wire saw can be disengaged from the connection sleeve with a force below the set value. Can be suppressed.

The side view of the connection sleeve which concerns on the Example of this invention. 1. The perspective view of FIG. The longitudinal cross-sectional view of FIG. The figure which formed the wire saw endlessly using the connection sleeve of FIG. FIG. 5 is an enlarged partial cross-sectional view of a main part of FIG. 4.

  A mode for carrying out the present invention will be described based on an embodiment shown in the drawings.

[Example 1]
1 is a side view of a connection sleeve 1 according to a first embodiment of the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is a longitudinal sectional view thereof.

  As shown in FIGS. 1 to 3, the connection sleeve 1 has a metal main body 2 formed in a cylindrical shape, and both ends of the main body 2 are opened in the axis XX direction. The connection hole 3 is formed so as to penetrate therethrough.

  As shown in FIG. 3, a female screw 3a having a predetermined length is engraved in the connection hole 3 inward from the one end surface 2a, which is the end in the traveling direction when the wire saw is used, in the axial XX direction. Further, a female screw 3b having a predetermined length is engraved inward from the other end surface 2b in the axis XX direction. Screwless portions 3c and 3d are provided on the inner side of the engraved portion of the female screw 3a and on the inner side of the engraved portion of the female screw 3b. The female screw 3a and the female screw 3b may have the same screw pitch or different screw pitches. In the present embodiment, the female screw 3a and the female screw 3b have the same screw pitch. Further, the lengths of the female screw 3a and the female screw 3b in the axis XX direction may be set to be the same or different, and in the present embodiment, the lengths of the female screw 3a and the female screw 3b are set. The length W1 was the same.

  Tapered guide surfaces 3e and 3f are formed at the outer ends of the female screw 3a and the female screw 3b, respectively.

  A positioning portion 4 projecting from the inner peripheral surface of the connection hole 3 toward the axis is formed in the central portion of the connection hole 3 in the axis XX direction over the entire circumferential direction. As shown in FIG. 3, the positioning portion 4 has a U-shape in which a wall surface 4a on one side and a wall surface 4b on the other side are substantially parallel to each other and an inner peripheral surface 4c is orthogonal to both side surfaces 4a and 4b. Is formed in.

  Further, the length from one end surface 2a to the positioning portion 4 and the length from the other end surface 2b to the positioning portion 4 are set to be the same length W2, and this length W2 is the female screw 3a and the female screw 3b. Is set to be larger than the length W1.

  On the outer peripheral surface 2c of the main body portion 2 on the running direction side when the wire saw is used, that is, on one end side, a tapered surface 2d is formed that expands from the end portion toward the inner side in the axis XX direction. ing. In this embodiment, the tapered surface 2d is formed so that the diameter increases from the one end surface 2a toward the inner side in the axis XX direction.

  Next, a method for forming the wire saw 10 in an endless shape by using both ends of the wire saw 10 provided with a plurality of diamond beads 10a at appropriate intervals and the connection sleeve 1 will be described.

  First, as shown in FIG. 5, an operator removes the resin layers of both ends 11 and 12 of the wire saw 10 so as to have the length W2 or more to expose the wire ropes 13 and 14. At this time, it is preferable to remove the resin layer as much as possible.

  Next, as shown in FIG. 5, the wire rope 13 at one end 11 of the wire saw 10 is inserted from the one end face 2a side of the connection sleeve 1 into the connection hole 3 until it abuts the positioning portion 4. Further, the wire rope 14 at the other end 12 of the wire saw 10 is inserted from the other end face 2b side of the connection sleeve 1 into the connection hole 3 until it abuts the positioning portion 4.

  Next, using a crimping tool such as a manual press machine (not shown), the connecting sleeve 1 is crimped to crimp the connecting sleeve 1 to both end portions 11 and 12 of the wire saw 10 to make the wire saw 10 endless.

  As described above, since the positioning portion 4 is provided in the connection hole 3, the insertion amount of each of the one end 11 and the other end 12 of the wire saw 10 into the connection hole 3 is always approximately The wire saw 10 and the connection sleeve 1 can be connected to each other with a constant connection force that is set. Therefore, the connection sleeve 1 to the wire saw 10 can be connected. Can be prevented from coming off with a force less than the setting.

  Further, since the tapered surface 2d is formed on one end of the outer peripheral surface 2c of the main body 2, the connecting force between the one end 11 of the wire saw 10 and the connection sleeve 1 is the other end of the wire saw 10. When the connection force between the portion 12 and the connection sleeve 1 becomes lower and the wire saw 10 comes off from the connection sleeve 1, the one end 11 has a higher probability of coming off first, and the connection sleeve 1 scatters alone. Can be suppressed.

[Other Examples]
In the first embodiment, the positioning portion 4 was formed in a U-shape, and the positioning portion 4 was provided over the entire circumferential direction. However, the positioning portion is the insertion position of the end portions 11 and 12 of the wire saw 10. Can have any shape as long as it can be made constant, for example, it may be formed so as to taper down to the axial core, or a plurality of positioning portions may be provided at appropriate intervals in the circumferential direction. Good.

  Further, the structure of the main body 2 is not limited to the structure described above as long as the positioning portion 4 is formed in the central portion of the connection hole 3 in the axis XX direction, and can be set arbitrarily.

  The other structure is similar to that of the first embodiment, and the description thereof is omitted.

  Also in the second embodiment, the same effect as that of the first embodiment is obtained.

1 Connection sleeve 3 Connection hole 4 Positioning part 10 Wire saw

Claims (2)

A connection sleeve for connecting both ends of a wire saw to form an endless shape,
The connection sleeve is formed into a cylindrical shape having connection holes with both ends opened in the axial direction ,
Wherein the central portion in the axial direction in the connection hole, a positioning portion protruding from the inner peripheral surface of the connecting hole to the axis side is formed,
A connection sleeve, wherein a taper surface is formed on the outer peripheral surface of the connection sleeve, the taper surface increasing in diameter from the end toward the main body on the running direction side when the wire saw is used . The connecting sleeve according to claim 1, wherein the connecting sleeve has the same outer diameter except for the tapered surface over the entire axial direction .

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