JP3015328U - Pulley for wire saw - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an inexpensive and durable pulley for a wire saw, in which the pulley body is not damaged even if the side surface of the guide groove of the pulley is worn, and the bearing is not damaged. . [Structure] A pulley body 4 and an elastic member 6 in which a guide groove 7 which is detachably provided on an outer peripheral surface of the pulley body and which guides a cutting wire is formed radially outward from a peripheral edge of the pulley body.
A plurality of bearings 34, 35 arranged in parallel between the pulley support shaft 2 and the pulley body, and a metal ring 38 arranged between the bearings.
The wire saw pulley is configured by including the.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wire saw pulley for guiding a cutting wire in a predetermined direction when a reinforced concrete structure or the like is cut by a wire saw.

[0002]

[Prior art]

 In recent years, when cutting reinforced concrete structures, diamond beads are fixed to a wire, this wire is hung on the object to be cut, and this wire is attached to a drive pulley driven by a drive device installed at a position distant from the object to be cut. A technique has been developed for cutting an object to be cut by hanging and driving the wire with a predetermined tension.

When cutting with such a wire saw, since the position of the object to be cut and the drive for the wire saw are separated, it is necessary to provide a guide pulley in order to smoothly run the wire between them. . Since this guide pulley guides the wire provided with the diamond beads for cutting the metal as described above, when the guide surface of the wire is metal, the contact causes the guide surface to be cut and damaged. It is considered to cover the guide groove provided on the guide surface for guiding the wire with the elastic member. At that time, as the elastic member, hard plastic, polyurethane, rubber or the like is used.

[0004]

[Problems to be solved by the device]

 In the conventional pulley for wire saws described above, when the cutting wire is worn at the correct position with respect to the guide groove of the elastic member, only the bottom surface of the guide groove is worn, but the cutting wire guides the elastic member. If the guide groove is hung at an angle to the groove or if it is urged toward the side surface of the inner groove, the side surface of the guide groove will be abruptly worn, and eventually the pulley body will be worn and Similar to the pulley without the member, there was a problem that the pulley body was eventually worn and the pulley was damaged.

For example, as shown in FIGS. 3 and 4, when the traveling direction of the cutting wire 50 is changed by the two pulleys A and B arranged at right angles to each other, when the cutting wire 50 is in the position shown by the solid line Is not a problem, but if the cutting wire 50 reaches the position shown by the alternate long and short dash line by abrading the bottom surface of the guide groove 51 in the horizontal pulley A, the cutting wire 50 is cut on the left side surface of the guide groove 52 in the vertical pulley B. This left side surface inevitably wears as the wire is pulled. That is, in this case, the wear of the bottom surface of the guide groove 51 or 52 in the one pulley A or the other pulley B causes the wear of the side surface of the guide groove 52, 51 in the other pulley B or A.

On the other hand, when the pulleys are continuously operated as described above, the ball bearings tightened by the bolts and nuts are compressed and the bearings are distorted, which deteriorates the rotation of the bearings. In some cases, it may become impossible to rotate.

Therefore, the present invention provides a pulley for a wire saw that is inexpensive and has a long durability without damaging the pulley body even if the side surface of the guide groove of the pulley is worn, and the bearing is not damaged. The purpose is to do.

[0008]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a pulley body and an elastic member that is detachably mounted on the outer peripheral surface of the pulley body and that guides a cutting wire. A wire saw pulley is configured by including a plurality of bearings arranged in parallel between the pulley support shaft and the pulley body, and a metal ring arranged between the bearings.

[0009]

[Action]

 Since the present invention is configured as described above, when the wire saw is guided in the guide groove of the pulley, even if the wire saw exerts a large force to the side of the guide groove, only the elastic member is worn. The pulley body is not damaged, only the elastic member needs to be replaced, and the wire saw exerts a large lateral force on the pulley body through the guide groove, and the multiple bearings ensure stable bearing operation. In addition, the ball bearings tightened with bolts and nuts are compressed and the bearings are not twisted.

[0010]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. In a cutting device that cuts reinforced concrete by running a wire with diamond beads attached, a pulley 1 installed at an appropriate position so that this wire can smoothly run between an object to be cut and a wire drive device. Is rotatably provided on a support shaft 2 via a bearing 3 and an elastic member 6 made of hard plastic, polyurethane, rubber or the like is fixed to the outer periphery 5 of the pulley body 4, and The wire is guided by a semicircular inner groove 7 formed on the outer periphery of the wire.

The pulley main body 4 is divided into two in the axial direction of the support shaft 2, and the first pulley member 10 on the right side in FIG. 1 has a bearing boss 11 on the axial center side and the first flange 1 on the outer periphery. 2 is formed, and an annular first concave portion 18 is provided on the inner peripheral surface 13 peripheral edge side of the first flange 12, and a first annular ring 14 protruding toward the inner lateral surface 13 side is provided on the peripheral edge of the first concave portion 12. Is forming. Six bolt seats 19 are formed on the outer surface 15 of the first pulley member 10 in the figure, and bolt insertion holes 16 are formed in the bolt seats 19. A step portion 17 is formed on the inner side surface 13 of the first pulley member 4 on the bearing boss 11 side, and an inner peripheral hole 21 of a second pulley member 20 described later is fitted into the step portion 17.

The second pulley member 20 has a second flange 22 formed on the outer periphery thereof, and the first concave portion 18 of the first flange 12 is provided on the peripheral side of the inner side surface 23 facing the inner side surface 13 of the first flange 12. A second recess 28 having the same shape as that of the first recess 18 is formed, and a second annular ring 24 having the same shape as the first annular ring 14 of the first recess 18 is formed on the peripheral edge of the second recess 28. As described above, when the inner peripheral hole 21 of the second pulley member 20 is fitted into the step portion 17 of the first pulley member 10, the screw hole 26 is provided at a position corresponding to the bolt insertion hole 16 of the first pulley member 10. Is forming.

The fixing ring 30 is integrally formed on the inner peripheral side of the elastic member 6, and its shape is such that when the first pulley 10 and the second pulley 20 are integrated, the first concave portion 18 and the second concave portion are formed. 28 has the same shape as the recess formed by 28, and has a first ring groove 31 and a second ring groove 32 formed on both sides of the root portion thereof, the shapes of which are respectively the first annular ring 14 and It has the same shape as the second annular ring 24. Accordingly, when the first pulley member 10 and the second pulley member 20 are integrated, when the elastic member 6 is interposed between the first pulley member 10 and the second pulley member 20, the fixing ring 30 of the elastic member 6 is clamped in the above-mentioned recess between them, and 1 Pulley part 10 The bolt insertion hole 16 of the second pulley member 20 and the screw hole 26 of the second pulley member 20 are aligned, and the bolt 33 is inserted from the bolt insertion hole 16 side. It is firmly held by the pulley member.

The bearing 3 provided between the bearing boss 11 of the first pulley member 10 and the support shaft 2 has a first bearing 34 and a second bearing 35 arranged in parallel, and seal plates 36 and 37 are arranged on both sides. However, it is fixed to the inner circumference of the bearing boss 11. A buffer ring 38 made of metal is provided on the inner race side between the bearings 34 and 35, and the inner diameter of the buffer ring 38 is larger than the outer diameter of the support shaft 2. Usually, the buffer ring 38 is used in a state in which the bolt 2 is inserted into the pulley, the nut 2'is tightened and fixed, and the concrete C is fixed by the anchor member 43 through the angle 42 as shown in FIG.

On both sides of the bearing boss 11, an outer peripheral flange 40 having an outer periphery fitted to the outer periphery of the bearing boss 11 is provided, and a hole 41 which is loosely fitted to the support shaft 2 is provided at the center. Bearing covers 45 and 46 having an inner peripheral flange 44 that abuts the bearings 34 and 35 are arranged.

When the pulley for a wire saw is operated, the cutting wire is guided by the guide groove 7 of the elastic member 6 to travel, and the diamond beads fixed to the cutting wire pass through the guide groove while appropriately biting into the elastic member. As a result, diamond beads wear less than metal guide grooves that cause slippage on the surface.

When the guide groove 7 is worn due to long-term operation, the elastic member 6 can be easily removed by loosening the bolt 33 to separate the first pulley member 10 and the second pulley member 20, and a new elastic member. Can be exchanged for. Furthermore, even if the cutting wire guided and running in the guide groove 7 exerts a lateral force as described above, and the side of the guide groove 7 may be gradually worn away, Since it does not reach the peripheral edge 5, it does not damage the expensive pulley body.

Further, when the cutting wire running in the guide groove 7 exerts a force to the side of the guide groove 7 as described above, it exerts a force on the pulley main body 4 in the direction of tilting it. Although a strong lateral force acts on the bearing, two bearings are installed side by side, so no matter which side the pulley body is laterally acted on, it will be stable. It can be a bearing.

As described above, the pulley body 4 is used by tightening it with the bolts 2 and the nuts 2 ′ when it is attached to the fixing angle 42 or other pulley frame or the like. Since the buffer ring 38 is provided between the two bearings 35, even if the bearings are compressed and distorted, the rotation of both bearings does not deteriorate or become unrotatable.

On the other hand, in the above-described embodiment, the head of the bolt 33 for joining and fixing the two pulley members 10 and 20 does not protrude from the outer side surface of the first pulley member 10, so that the rotation of the pulley is prevented. The risk of various objects getting caught in the occasionally protruding bolts is reduced.

Further, since the cover is provided on the side surface of the bearing of the pulley, it is possible to surely prevent water, dust, and the like from entering the inside of the bearing.

[0022]

[Effect of device]

 Since the present invention is configured and operates as described above, the pulley body will not be damaged even if the side surface of the pulley guide groove is worn, and a large force acts on the side surface of the pulley guide groove. Even if the bearings are installed side by side, a stable bearing action can be achieved by arranging multiple bearings side by side. Since it is placed, it can be buffered.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a side view of the present invention in use.

FIG. 4 is a front view for explaining the wear tendency of the guide groove when the pulleys are arranged in a direction orthogonal to each other.

5 is a plan view of the pulley shown in FIG. 4. FIG.

[Description of Reference Signs] 1 pulley 2 support shaft 3 bearing 4 pulley body 6 elastic member 7 guide groove 10 first pulley member 11 bearing boss 12 first flange 14 first annular ring 15 outer surface 18 first recess 20 second pulley member 22 2nd flange 24 2nd annular ring 28 2nd recessed part 30 fixed ring 31 1st ring groove 32 2nd ring groove 33 bolt 34 1st bearing 35 2nd bearing 36, 37 seal plate 38 buffer ring 40 outer peripheral flange 42 angle 43 Anchor member 44 Inner peripheral flange 45, 46 Bearing cover

Claims (4)

[Scope of utility model registration request] 1. A pulley main body, and an elastic member that is detachably provided on an outer peripheral surface of the pulley main body and has guide grooves for guiding a cutting wire formed radially outward from a peripheral edge of the pulley main body.
A plurality of bearings arranged in parallel between the pulley support shaft and the pulley body,
A pulley for a wire saw, which is equipped with a metal ring arranged between the bearings. 2. A pulley main body and a pulley supporting shaft are formed so as to be divided into two parts in the axial direction, and grooves are provided at positions opposite to each other on the outer peripheral edge of the divided pulley to form elastic member holding portions, and the pulley is integrally formed. The pulley for a wire saw according to claim 1, wherein a bolt hole communicating with each other at the time of assembly is provided, and the bolt hole is arranged at a position where the head of the integrating bolt does not project from the side surface of the pulley at the time of integrating. 3. The wire saw pulley according to claim 1, further comprising a cover facing the bearing side surface of the pulley and slidingly contacting the bearing side surface to cover the bearing side portion. 4. The pulley supporting shaft insertion hole of the metal ring has a diameter larger than an outer diameter of the pulley supporting shaft, and is arranged so as to be freely movable between the adjacent bearings. Pulley for wire saw.