CABLE SAW

Description

[0001] The invention relates to a wire saw according to the preamble of claim 1.

[0002] Such a wire saw is known, for example, from WO 2014 / 000003 A1.

[0003] In such a wire saw, a saw wire studded with diamond segments is typically pulled through the workpiece at a speed of up to 40 m / s (144 km / h) to cut stone blocks.

[0004] In known stationary wire saws, such as those described in FR 596 906 A, an endless saw wire is typically guided over two pulleys. A disadvantage of this design is that the workpieces to be cut cannot be processed on-site but must be transported to the wire saw. Another disadvantage is that the fixed distance between the two pulleys limits the saw's cutting area and height, and it can only operate under wire tension, which is usually not adjustable. Because of these disadvantages, the weight and size of the solid workpiece that can be cut with these stationary wire saws are also limited.

[0005] For example, mobile wire saws known from EP 1 086 794 A2, which are brought to the solid workpiece to cut it, have a main disadvantage in that an open saw wire must be wrapped around the workpiece and then crimped to form an endless saw wire. This requires drilling a hole in the workpiece to allow the saw wire to pass through. A disadvantage is that the saw wire must be opened to guide it through the workpiece. This is also detrimental because the saw wire cannot be guided precisely, thus preventing an accurate cut. Since the saw wire is also guided around sharp edges, for example, at the entry point into the workpiece or at the exit point, it is typically subject to increased wear and tear, and there is a higher risk of injury, as a relatively long section of the saw wire can whip out in a whip-like motion if it breaks.A large safety zone must be established around the wire saw. Another disadvantage of such wire saws is the size of the guide unit, which limits their mobile use, as the dimensions of such a fully assembled saw do not allow for long transport distances. For this reason, these wire saws often have to be fully assembled on-site before use.

[0006] DE 10 2005 037542 A1 discloses a wire saw with a driven saw wire, wherein the saw wire forms a saw section for engaging a workpiece, and at least one guide device formed from two telescopic arms and a rotary axis for guiding the driven saw wire, wherein the guide device is configured to position the saw section of the driven saw wire relative to the workpiece. With the described guide device, the saw section can be moved towards the workpiece by extending or retracting the two telescopic arms in a radial direction relative to the axis.

[0007] It is therefore an object of the invention to provide an improved wire saw that enables a compact transport size and quick and safe use, while also providing high flexibility in changing the position and / or length of the saw section by means of the guide device.

[0008] This problem is solved by a wire saw having the features of claim 1.

[0009] Because the guide mechanism has a separate rope storage unit for each direction of movement, the wire saw can be compact for transport while still ensuring precise and safe guidance of a sufficiently large saw section during workpiece cutting. The rope storage units assigned to each direction of movement allow for a compact design and flexible adjustment of the saw section's position and / or length via the guide mechanism, making the wire saw usable under both tension and compression forces. This separate assignment of rope storage units to each direction of movement allows the saw rope section to be flexibly adjusted to the desired cut shape, length, width, and height.The integrated rope storage system allows for a very compact design of the flexibly adaptable guide system, as a separate rope storage unit is provided for each direction of movement. This also makes it possible to reduce the size of the individual rope storage units, which, in the event of rope breakage, shortens the length of the whipping saw rope, thus allowing for a smaller required safety zone when cutting the workpiece.

[0010] The guide unit features two main telescopic extensions, which feed the saw section towards the workpiece to be cut. These two main telescopic extensions allow for particularly easy adjustment of the saw section's position by the guide unit. Advantageously, the two main telescopic extensions enable both coordinated and independent feeds of the saw section towards the workpiece. This allows for exceptionally flexible positioning of the saw section relative to the workpiece.

[0011] Furthermore, the main telescopic extensions of the guide mechanism are designed to be adjustable in their distance from one another, thus changing the length of the sawing section. By changing the distance between the two main telescopic extensions relative to each other, the length of the sawing section can be varied very easily by shifting the main telescopic extensions in one direction of movement of the guide mechanism. Shifting both extensions outwards increases the distance between them and thus the length of the available sawing section, while shifting both extensions inwards decreases the distance between them and thus reduces the length of the available sawing section. This allows the guide mechanism of the wire saw to be quickly adjusted from a compact transport configuration to a larger sawing configuration.Advantageous embodiments and further developments of the invention are set forth in the dependent claims. It should be noted that the features listed individually in the claims can also be combined with one another in any technologically meaningful way, thus revealing further embodiments of the invention.

[0012] According to an advantageous embodiment of the invention, the guide device has a rope storage unit formed by at least one pair of deflection pulleys for each direction of movement. Forming the associated rope storage unit from at least one pair of deflection pulleys allows for a particularly simple and compact design of the guide device. The at least two deflection pulleys of a rope storage unit store the saw rope for the associated direction of movement by deflecting it and release it as needed for movement in that direction.

[0013] A particularly preferred embodiment provides that the pair of deflection pulleys of a rope storage unit stores or releases saw rope by increasing or decreasing the distance between the pulleys grouped in pairs to form the rope storage unit when the position and / or length of the saw section changes. By increasing or decreasing the pulley distance, the rope storage unit can very easily store and release the required amount of saw rope when the guide device moves in the corresponding direction. For this purpose, the change in the pulley distance is advantageously coupled to the movement of the guide device in the corresponding direction of movement. This coupling of the pulley distance to the individual direction of movement of the guide device allows the rope storage system to be very simple and compact when the position and / or length of the saw section changes.The coupling of the roller spacing of the deflection rollers to the movement of the guide device in the assigned direction ensures that the saw rope is always stored or released to the extent dependent on the movement.

[0014] A particularly advantageous embodiment of the invention relates to the fact that the distance between the pulleys, which are grouped in pairs to form the rope storage unit, can be changed via telescopic extensions, on which at least one pulley is arranged. The distance between the paired pulleys can be easily changed via the telescopic extensions in order to adapt the storage capacity of the rope storage unit to changes in the position and / or length of the saw section made by the guide device. The change in the distance between the pulleys via the telescopic extensions allows for a very simple coupling with a movement in the associated direction of movement, since the telescopic extensions are coupled to the guide device and can be extended when the guide device moves in the direction of movement associated with the rope storage unit.

[0015] A particularly advantageous embodiment of the invention provides that the distance between the pulleys, which are grouped in pairs to form the rope storage unit, can be changed via telescopic extensions on which both pulleys are mounted. In this case, the pulleys are preferably arranged on a double telescopic extension, which can advantageously move the two pulleys, grouped in pairs to form the rope storage unit, in opposite directions in order to change the distance between the two pulleys and their position relative to each other and absolute to the workpiece. This provides a guide device that can change the position and / or length of the saw section of the wire saw with particular flexibility.

[0016] A particularly advantageous embodiment provides that the main telescopic extensions have deflection pulleys grouped in pairs to form a cable storage unit. These pulleys can be adjusted in their extended position on both sides of the main telescopic extensions to advance the saw section towards the workpiece to be cut. Changing the extended position of the deflection pulleys arranged on the main telescopic extensions allows for particularly easy advancement of the saw section towards the workpiece to be cut.

[0017] According to a preferred embodiment of the invention, the main telescopic extensions are movable independently of each other. With independent movement of the two main telescopic extensions relative to each other and relative to the workpiece, the guide device can be flexibly adjusted and the position and / or length of the saw section can be easily changed.

[0018] Further features, details, and advantages of the invention will become apparent from the following description and the drawings, which show exemplary embodiments of the invention. Corresponding objects or elements are provided with the same reference numerals in all figures. The figures show: Figure 1: Wire saw according to the invention on a telescopic handler; Figure 2: Rear view of the wire saw; Figure 3: Front view of the wire saw; Figure 4: One-sided feed of the saw section; Figure 5: Two-sided feed of the saw section; Figure 6: One-sided extension of the saw section; Figure 7: Two-sided extension of the saw section; Figure 8: Detail view of the rotating device; Figure 9: View of the swiveling device; Figure 10: Detail view of the wire storage and tensioning device; Figure 11: Side view of the retracted lower main telescopic extension; Figure 12: Side view of the extended lower main telescopic extension; and Figure 13: Front view of a variant of the wire saw.

[0019] In the Figure 1 Reference numeral 1 denotes a wire saw according to the invention. The wire saw 1 is shown here attached to a telescopic handler 16 via an interchangeable device 15. For this purpose, the wire saw 1 is provided with an interchangeable device 15 for attachment to a mobile carrier 16, such as the telescopic handler. Depending on the application, the mobile carrier 16 can be attached via the interchangeable device 15 to a carrier vehicle, in particular a powered commercial vehicle, e.g., a wheeled excavator, a tracked excavator, a wheel loader, a tractor with a front loader, or the like, and also to a telescopic handler.

[0020] This allows the mobile wire saw 1 to be transported to the work site, e.g., even to exposed stones, where the workpieces W can be cut on site. A complex and costly transport of the workpieces W to the wire saw 1 is therefore no longer necessary. The time required to cut the workpiece W is significantly reduced. Since the wire saw 1 according to the invention can be used mobilised on a carrier device 16, it is further ensured that the workpiece W no longer needs to be moved, in particular lifted, towards the saw wire 3, but rather that the saw wire 3 can now be moved towards the workpiece W. Figure 2 The wire saw 1 according to the invention is shown obliquely from the rear. In this perspective view, the changing device 15 is clearly visible, by means of which the wire saw 1 is connected to the support device 16 ( Fig. 1) can be coupled. The interchangeable device 15 has a suspension 17 and a perforated plate 18 to allow the wire saw 1 to be mounted at a stepwise tilted position relative to the support device 16. A stand 19 is also visible in the rear view, which allows the wire saw 1 to be placed on the surface or on a workpiece W to be cut ( Fig. 1 ) can be set down. By supporting the wire saw 1 on the workpiece W to be cut ( Fig. 1 ), the support device 16 can be relieved of load during cutting. Also shown in this illustration is the drive 2 of the wire saw 1, via which the saw wire 3 is driven to cut the workpiece W ( Fig. 1 ) is driven. The drive 2 can be a purely hydraulic, a purely electric or an electro-hydraulic drive 2 and could drive any of the deflection pulleys.

[0021] The Figure 3 The wire saw 1 shows according to the Figure 1 and 2In a front view, taken at an angle from the front, the guide of the saw wire 3, driven by the drive 2, through the entire guide assembly 5 is visible. The drive 2 is coupled to a drive pulley 20 to transmit the drive's rotary motion to the saw wire 3. The drive pulley 20 converts the rotary motion of the drive 2 into a translational motion of the saw wire 3. The saw wire 3 is guided under a protective cover 21 to a first deflection pulley 7. This deflection pulley 7, together with the next deflection pulley 7a, forms a first pair of deflection pulleys 7, 7a, which serves as a first wire storage unit 6a. After this wire storage unit 6a, the saw wire 3 is deflected via another deflection pulley 22 to a second pair of deflection pulleys 8, 8b, which forms a second wire storage unit 6b.While the first rope storage unit 6a, as will be explained in more detail later, is assigned to the lateral direction of movement A of the second pair of deflection pulleys 8, 8b, the second pair of deflection pulleys 8, 8b forms the second rope storage unit 6b for the delivery of the lower deflection pulley 8b and the subsequent saw section 4 in direction B and of the workpiece W to be cut, which, during cutting, as in . Figure 1The saw section 4, formed by the saw wire 3, is preferably located below the saw section 4. The saw section 4 terminates with the lower deflection pulley 9 of a third pair of deflection pulleys 9, 9c, which forms the third wire storage unit 6c. This third wire storage unit 6c is also assigned to the feed of the saw section 4 in the direction of the workpiece W to be cut. Following the third wire storage unit 6c, a further deflection pulley 23 is provided, which deflects the saw wire 3 to a fourth pair of deflection pulleys 10, 10d of the guide device 5, this fourth pair of deflection pulleys 10, 10d forming a fourth wire storage unit 6d. This fourth wire storage unit 6d comprises, as deflection pulley 10d, the drive pulley 20 coupled to the drive 2 and, as will be explained in more detail later, is assigned to the lateral direction of movement D of the third pair of deflection pulleys 9, 9c.The first pair of deflection pulleys 7, 7a also includes a rope tensioning device 6, which ensures sufficient rope tension of the saw rope 3 in the guide device 5 and also compensates for temperature- or wear-related elongations of the rope 3 during the cutting of the workpieces W (. Fig. 1 ) compensates. When cutting a workpiece W ( Fig. 1 ) the saw section 4 formed between the lower deflection rollers 8b, 9 engages the workpiece W to be cut ( Fig. 1) one. For this purpose, the saw wire 3 is preferably provided with diamond segments that cut into the workpiece material when the concrete or stone block is cut. The saw wire 3 can be guided in the wire saw 1 via the guide device 5 shown, and the saw section 4 formed by the saw wire 3 can be easily positioned relative to the workpiece W. For this purpose, the guide device 5 allows several independent directions of movement A, B, C, D, so that in addition to advancing the saw section 4 towards the workpiece W to be cut, a change in the length of the saw section 4 is also possible, at least by means of the vertical displacement of the lower guide rollers 8b, 9, at least by means of the horizontal displacement of the lower guide rollers 8b, 9.A special feature of the wire saw 1 shown here is that the guide device 5 has a separate wire storage unit 6a, 6b, 6c, 6d for each of the directions of movement A, B, C, D, assigned to the individual direction of movement A, B, C, D.

[0022] Thus, the first rope storage unit 6a is assigned to the lateral or horizontal direction of movement A of the second pair of deflection pulleys 8, 8b and enables, as also in Figure 7 It can be seen that there is a lateral or horizontal displacement of the second pair of deflection pulleys 8, 8b. With the displacement of the lower deflection pulley 8b of the second pair of deflection pulleys 8, 8b outwards, the saw section 4 formed by the saw wire 3 is, as in Figure 7The image is enlarged. The saw rope 3 required for the lateral extension of the saw section 4 is released from the first rope storage unit 6a when the second pair of deflection pulleys 8, 8b moves in the first direction of movement A. If the second pair of deflection pulleys 8, 8b, as shown in Figure 3 As can be seen, in the first direction of movement A, the first rope storage unit 6a is shifted inwards again, allowing the saw rope 3 to be picked up again. For this purpose, the distance between the deflection pulleys 7, 7a of the deflection pulley pair 7, 7a forming the first rope storage unit 6a is changed synchronously with the shift of the second deflection pulley pair 8, 8b. To release the saw rope 3, the distance between the deflection pulleys 7, 7a of the first rope storage unit 6a is adjusted as shown in Figure 7The saw rope 3 is shortened to release the stored rope length from the first rope storage unit 6a for a corresponding extension of the saw section 4. When the saw section 4 is shortened, the distance between the deflection pulleys 7, 7a of the first rope storage unit 6a is increased again to store the saw rope 3 in the first rope storage unit 6a according to the shortening. The change in the distance between the deflection pulleys 7, 7a, which are grouped in pairs for the first rope storage unit 6a, is achieved by arranging the second deflection pulley 7a on a first telescopic extension 11, via which the pulley spacing of the deflection pulley pair 7, 7a in the first rope storage unit 6a can be changed.

[0023] The second rope storage unit 6b is for a vertical direction of movement B for the delivery of the saw section 4 in the direction of the workpiece W to be cut ( Fig. 1 ) assigned and enables, as also in Figure 4 and 5It can be seen that there is a vertical displacement of the lower deflection pulley 8b of the second deflection pulley pair 8, 8b. This causes the saw section 4 to be, as in the Figure 4 and 5 As can be seen, the saw wire is guided on the right side in the direction of the workpiece W to be cut. With the downward movement of the lower deflection pulley 8b of the second deflection pulley pair 8, 8b, the saw section 4 formed by the saw wire 3 is guided, as shown in Figure 4 and 5 The saw rope 3, required for feeding the saw section 4, is released from the second rope storage unit 6b when the lower deflection pulley 8b of the second deflection pulley pair 8, 8b moves in the second direction of movement B. When the lower deflection pulley 8b of the second deflection pulley pair 8, 8b is moved, as shown in Figure 3As can be seen, in the second direction of movement B, the saw rope 3 is shifted upwards again, and the second rope storage unit 6b can take up the saw rope 3 again. For this purpose, the distance between the deflection pulleys 8, 8b of the deflection pulley pair 8, 8b forming the second rope storage unit 6b is changed. To release saw rope 3, the position and distance between the deflection pulleys 8, 8b of the second rope storage unit 6b are adjusted as shown in Figure 4 and 5The position of the saw blade is modified to release the corresponding stored rope length from the second rope storage unit 6b for the advancement of the saw section 4. When the saw section 4 is advanced towards the workpiece W to be cut, the lower deflection pulley 8b is moved downwards via the first main telescopic extension 12, 12b in accordance with the advancement. This first main telescopic extension 12, 12b is designed as a double telescopic extension 12, 12b with a two-part telescopic extension 12, 12b extending in opposite directions. Simultaneously with the advancement of the lower deflection pulley 8b by the telescopic extension 12b, the distance between the upper deflection pulley 8 of the second rope storage unit 6b and the further deflection pulley 22 is reduced by half the advancement by the second telescopic extension 12. This releases the saw rope length stored in the second rope storage unit 6b.When the saw section 4 retracts, the distance between the deflection pulleys 8, 8b of the second rope storage unit 6b is changed again by increasing the distance between the further deflection pulley 22 and the upper deflection pulley 8 of the second rope storage unit 6b by half the return stroke of the lower deflection pulley 8b, in order to store the saw rope 3 in the second rope storage unit 6b according to the return stroke. The change in the distance between the deflection pulleys 8, 8b, which are grouped in pairs to form the second rope storage unit 6b, is achieved by arranging the two deflection pulleys 8, 8b on the second telescopic extension 12, 12b, which, as a double telescopic extension 12, 12b, changes the distance between the deflection pulleys 8, 8b by changing the position of both deflection pulleys 8, 8b.

[0024] The third rope storage unit 6c is also assigned to a vertical direction of movement C for the delivery of the saw section 4 towards the workpiece W to be cut and enables, as in Figure 5It can be seen that there is a vertical displacement of the lower deflection pulley 9 of the third deflection pulley pair 9, 9c, which forms the third rope storage unit 6c. This causes the saw section 4 to be, as in Figure 5 As can be seen, the saw wire is guided on the left side in the direction of the workpiece W to be cut. By moving the lower deflection pulley 9 of the third deflection pulley pair 9, 9c downwards, the saw section 4 formed by the saw wire 3 is guided, as shown in Figure 5 The saw rope 3, required for feeding the saw section 4, is released from the third rope storage unit 6c when the lower deflection pulley 9 of the third deflection pulley pair 9, 9c moves in the third direction of movement C. When the lower deflection pulley 9 of the third deflection pulley pair 9, 9c is moved, as shown in Figure 3As can be seen, in the third direction of movement C, the saw rope 3 is shifted upwards again, allowing the third rope storage unit 6c to receive it again. For this purpose, the distance between the deflection pulleys 9, 9c of the deflection pulley pair 9, 9c forming the third rope storage unit 6c is changed.

[0025] To release saw rope 3, the position and distance of the deflection pulleys 9, 9c of the third rope storage unit 6c are determined as shown in Figure 5The position of the saw section 4 is modified to release the corresponding stored rope length from the third rope storage unit 6c for the advancement of the saw section 4. When the saw section 4 is advanced towards the workpiece W to be cut, the lower deflection pulley 9 is moved downwards via the second main telescopic extension 13, 13c in accordance with the advancement. This second main telescopic extension 13, 13c is designed as a double telescopic extension 13, 13c with two-part telescopic sections 13, 13c extending in opposite directions. Simultaneously with the advancement of the lower deflection pulley 9, the distance between the upper deflection pulley 9c of the third rope storage unit 6c and the subsequent further deflection pulley 23 is reduced by half the advancement by the third telescopic extension 13, 13c. This releases the saw rope length stored in the third rope storage unit 6c.When the saw section 4 retracts, the distance between the deflection pulleys 9, 9c of the third rope storage unit 6c is changed again by increasing the distance between the further deflection pulley 23 and the upper deflection pulley 9c of the third rope storage unit 6c by half the return stroke of the lower deflection pulley 9, in order to store the saw rope 3 in the third rope storage unit 6c according to the return stroke. The change in the distance between the deflection pulleys 9, 9c, which are grouped in pairs for the third rope storage unit 6c, is achieved by arranging the two deflection pulleys 9, 9c on the third telescopic extension 13, 13c, which forms the second main telescopic extension 13, 13c and, as a double telescopic extension 13, 13c, changes the distance between the deflection pulleys 9, 9c by changing the position of both deflection pulleys 9, 9c.

[0026] The fourth rope storage unit 6d is assigned to the lateral or horizontal direction of movement D of the third pair of deflection pulleys 9, 9c and enables, as in the Figure 6 and 7 It can be seen that there is a lateral or horizontal displacement of the third pair of deflection pulleys 9, 9c. With the displacement of the lower deflection pulley 9 of the third pair of deflection pulleys 9, 9c outwards, the saw section 4 formed by the saw wire 3 is, as in Figure 6 and 7 The image is enlarged. The saw rope 3 required for the lateral extension of the saw section 4 is released from the fourth rope storage unit 6d when the third pair of deflection pulleys 9, 9c moves in the fourth direction of movement D. If the third pair of deflection pulleys 9, 9c, as shown in Figure 3As can be seen, in the fourth direction of movement D, the fourth rope storage unit 6d is shifted inwards again, allowing the saw rope 3 to be picked up again. For this purpose, the distance between the deflection pulleys 10, 10d of the deflection pulley pair 10, 10d forming the fourth rope storage unit 6d is changed by shifting the deflection pulleys 10, 23 in parallel with the lateral shift of the third deflection pulley pair 9, 9c. To release saw rope 3, the distance between the deflection pulleys 10, 10d of the fourth rope storage unit 6d is adjusted as shown in Figure 6 and 7The saw rope 3 is shortened to release the stored rope length from the fourth rope storage unit 6d for a corresponding extension of the saw section 4. When the saw section 4 is shortened, the distance between the deflection pulleys 10, 10d of the fourth rope storage unit 6d is increased again to store the saw rope 3 in the fourth rope storage unit 6d according to the shortening. The change in the distance between the deflection pulleys 10, 10d, which are grouped in pairs in the fourth rope storage unit 6d, is achieved by arranging the first deflection pulley 10 on a fourth telescopic extension 14, via which the pulley spacing of the deflection pulley pair 10, 10d in the fourth rope storage unit 6d can be changed.

[0027] Out of Figure 4The one-sided feed of the saw section 4 into the workpiece W is shown. The right main telescopic extension 12, 12b is actuated here independently of the left main telescopic extension 13, 13c to feed the saw section 4 towards the workpiece W to be cut. The right upper deflection pulley 8 was moved downwards by only half the distance of the lower deflection pulley 8b of the second rope storage unit 6b. Thus, rope storage in the second rope storage unit 6b occurs via the telescoping of the second telescopic extension 12, 12b in a 1:2 ratio. With the double telescope 12, 12b of the first main telescopic extension 12, 12b, over which both deflection pulleys 8, 8b of the second rope storage unit 6b can be moved, rope storage therefore occurs in a 1:2 ratio. The distance between the two deflection pulleys 8, 8b of the second rope storage unit 6b is not constant but flexibly adjustable via the double telescope 12, 12b. The in Figure 4The one-sided feed of the saw section 4 shown has the advantage that the saw rope 3 does not always have to be driven evenly through a workpiece W on both the left and right sides, which, depending on the application, leads to a lower load on the saw rope or can accelerate the sawing process.

[0028] In Figure 5In contrast, a two-sided feed of the saw section 4 by the two main telescopic extensions 12, 12b, 13, 13c is shown. For this purpose, the main telescopic extensions 12, 12b, 13, 13c position the deflection pulleys 8, 8b, 9, 9c, which are grouped in pairs to form the rope storage unit 6b, 6c, by changing their extension position to achieve a feed of the saw section 4 towards the workpiece W to be cut. The figure shows that separate rope storage units 6b, 6c are formed on both main telescopic extensions 12, 12b, 13, 13c in order to release the stored saw rope 3 for the movements of the guide device 5 when the lower deflection pulleys 8b, 9 or the saw section 4 formed between them is fed towards the workpiece W to be cut.Because the two upper 12, 13c and the two lower telescopic extensions 12b, 13 of the double telescopes 12, 12b, 13, 13c move downwards in a ratio of 50 / 100, the total rope length of the saw rope 3 as well as the width of the formed saw section 4 remains unchanged during delivery.

[0029] Out of Figure 6This results in a one-sided extension of the saw section 4 on the wire saw 1. For this purpose, the fourth wire storage unit 6d, which is assigned to the lateral or horizontal direction of movement D of the second main telescopic extension 13, 13c, releases the required saw wire 3. This enables the fourth wire storage unit 6d to allow a lateral or horizontal displacement of the third pair of deflection pulleys 9, 9c together with the third telescopic extension 13, 13c. With the outward displacement of the lower deflection pulley 9 of the third pair of deflection pulleys 9, 9c, the saw section 4 formed by the saw wire 3 is enlarged. The saw wire 3 required for the lateral extension of the saw section 4 is released by the fourth wire storage unit 6d when the third pair of deflection pulleys 9, 9c moves in the fourth direction of movement D. If the third pair of deflection pulleys 9, 9c is moved together with the double telescopic extension 13, 13c, as in Figure 3As can be seen, in the fourth direction of movement D, the fourth rope storage unit 6d is shifted inwards again, allowing the saw rope 3 to be picked up again. For this purpose, the distance between the deflection pulleys 10, 10d of the deflection pulley pair 10, 10d forming the fourth rope storage unit 6d is changed. To release saw rope 3, the distance between the deflection pulleys 10, 10d of the fourth rope storage unit 6d is adjusted, as also in Figure 7The saw rope 3 is shortened to release stored rope length from the fourth rope storage unit 6d for a corresponding lengthening of the saw section 4. When the saw section 4 is shortened, the distance between the deflection pulleys 10, 10d of the fourth rope storage unit 6d is increased again to store the saw rope 3 in the fourth rope storage unit 6d according to the shortening. The change in the distance between the deflection pulleys 10, 10d, which are grouped in pairs to form the fourth rope storage unit 6d, is achieved by arranging the first deflection pulley 10 on a fourth telescopic extension 14, via which the pulley spacing of the deflection pulley pair 10, 10d in the fourth rope storage unit 6d can be changed. Thus, when the saw section 4 is lengthened or shortened, the rope length compensation takes place via the horizontal rope storage in the first 6a and the fourth rope storage unit 6d. The horizontal rope length compensation in the two rope storage units 6a, 6d occurs in a 1:1 ratio.A particularly noteworthy feature of the arrangement of the deflection pulleys 7, 7a, 8, 8b, 9, 9c, 10, 10d in the guide device 5 is that a total of four deflection pulleys 7a, 22, 8, 8b and 9, 9c, 23, 10 are located on each of the laterally movable extensions. Two of the deflection pulleys 23, 10 are positioned at a constant horizontal distance for the function of the side extension. The cable tensioning device 6 is arranged on the other side extension, so that the distance between the two deflection pulleys 7a, 22 on the extension is variable. The drive pulley 20 is fixedly attached to the machine frame and coupled to the drive 2.

[0030] The Figure 7Figure 1 shows the extension of the saw section 4 on both sides by changing the distance between the two main telescopic extensions 12, 12b, 13, 13c. These two double telescopic extensions 12, 12b, 13, 13c are moved apart laterally to the workpiece W to be cut via the first 11 and the fourth telescopic extension 14. This allows for a compact transport size when the telescopic extensions 11, 12, 12b, 13, 13c, 14 are retracted, while, as shown in Figure 2, the saw section 4 is extended on both sides by changing the distance between the two main telescopic extensions 12, 12b, 13, 13c, 13c. Figure 7 as can be seen, with the main telescopic extensions 12, 12b, 13, 13c shifted outwards on both sides, a wide saw section 4 can be created between the lower deflection rollers 8b, 9.

[0031] The Figure 8 shows a detailed view of the rotary device 24, which is also in Figure 2The diagram shows how the guide device 5 can be rotated around the changeover device 15. For this purpose, a working cylinder 25 is provided, which enables a rotational movement between the guide device 5 and the changeover device 15 about the pivot joint 26 formed here. This allows the guide device 5 to be aligned before the cutting process and also rotated around the changeover device 15 during operation.

[0032] Out of Figure 9 The figure shows a view of the pivoting device 27 between the changing device 15 and the guide device 5, by means of which the guide device 5 can be pivoted relative to the changing device 15. For this purpose, working cylinders 25 are provided, which initiate the pivoting movement between the changing device 15 and the guide device 5. This allows the guide device 5 to be aligned before the cutting process and also to be pivoted relative to the changing device 15 during operation.

[0033] Figure 10 Figure 6 is a detailed view of the rope storage and tensioning device 6. This device has a tensioning cylinder 28 that moves the deflection pulley 7a, which is used as a tensioning roller. The tensioning cylinder 28, preferably designed as a hydraulic cylinder, is pressurized during sawing to maintain constant rope tension. This is achieved according to the operating principle of a spring. The pressure in the tensioning cylinder 28 is relatively constant; however, the control is not based on the pressure itself, but rather on the output signal, for example, from a measuring pin that connects the lugs to the eye of the cylinder 28. If, as in Figure 4As shown, when only one main telescopic extension 12, 12b is extended, the tensioning cylinder 28 automatically compensates for the rope length by means of pressure control via the displacement of the tensioning roller 7a. When the saw rope 3 is placed on the guide, the tensioning cylinder 28 is retracted so that the rope 3 can be placed without tension onto the deflection rollers 7, 7a, 8, 8b, 9, 9c, 10, 10d 22, 23 of the guide device 5.

[0034] The rope tensioning device 6 with the deflection pulley 7a also serves the purpose of compensating for changes in rope length, which may occur, for example, due to the diagonal orientation of the saw section 4, as in Figure 4 shown and which cannot be compensated for by the rope storage units 6a, 6b, 6c, 6d.

[0035] In Figure 11Figure 1 shows a side view of a retracted lower main telescopic extension 12, 12b, 13, 13c. Each main telescopic extension 12, 12b, 13, 13c has a working cylinder 25 by which the double telescopic extension 12, 12b, 13, 13c can be extended. The extension box 29 is fixedly connected to the working cylinder housing 30. The upper telescopic extension 12, 13c is connected to the upper guide pulley 8, 9c, and the piston rod of the working cylinder 25. The working cylinder 25 adjusts the height of the upper telescopic extension 12, 13c via the piston rod. The lower telescopic extension 12b, 13c is adjusted in height by the movement of the upper telescopic extension 12, 13c via cables 31. The two cable pulls 31 are necessary to exert both tension and pressure.

[0036] As in Figure 12As can be seen, lowering the upper telescopic extension 12, 13c by means of the working cylinder 25 via the cables causes the lower telescopic extension 12b, 13 to be lowered by twice its length. For example, if the saw section 4 is moved downwards by one meter using a main telescopic extension, it is sufficient to move the upper deflection pulley 8, 9c of the telescopic boom downwards by half a meter. This can be easily achieved by a controlled change in length of the upper part of the three-part main telescopic extension 12, 12b, 13, 13c, 29. The upward and downward change in length of the main telescopic extension 12, 12b, 13, 13c can be achieved, for example, with the aid of working cylinders. Telescoping can also be achieved via two hydraulic cylinders or one telescopic hydraulic cylinder, an electric linear drive, a rack and pinion drive, a lifting spindle drive with trapezoidal spindle, or the like.For the above example of changing the sawing depth by one meter, a very long hydraulic cylinder would be required to extend the lower extension 12b, 13 accordingly. In addition, another hydraulic cylinder would be needed to retract the upper telescopic extension 12, 13c by half a meter. Therefore, the [context missing] offers [context missing]. Figure 11 and 12 The construction shown represents a significant simplification by using only one working cylinder 25 for each double telescopic extension 12, 12b, 13, 13c, which initially actuates the upper telescopic extension 12, 13c. The necessary double length change of the lower telescopic extension 12b, 13 is achieved by a system with two cable pulleys 31 – or chain pulleys with two deflection pulleys on the upper telescopic extension 12, 13c – which couples the lower telescopic extension 12b, 13 to the upper telescopic extension 12, 13c.

[0037] The proposed wire saw 1 has the advantage that the wire storage is distributed across several wire storage units 6a, 6b, 6c, 6d. For wire storage when the width of the saw section 4 changes, two sets of two deflection pulleys 7, 7a, 10, 10d are provided, which compensate for the change in length of the saw wire 3 when the distance between the main telescopic extensions 12, 12b, 13, 13c is changed. The deflection pulleys 7a, 22 and 10, 23, respectively, are moved in sync with the main telescopic extensions 12, 12b, 13, 13c by means of the first and fourth telescopic extensions 11, 14, respectively.

[0038] To adjust the feed of the saw wire 3, which is set by changing the length or height of the lateral telescopic extensions, the wire storage is provided within the telescopic extensions 12, 12b, 13, 13c themselves. The telescopic extensions 12, 12b, 13, 13c are thus not only used to change the feed of the saw wire, but also, via a controlled upward and downward length change of the double telescopic extensions 12, 12b, 13, 13c in conjunction with two further deflection pulleys 8, 9c arranged at the upper end of the telescopic extensions, serve as wire storage 6b, 6c.

[0039] In a wire saw 1, it is advantageous to keep the number of deflections of the guide device 5 as low as possible, because each deflection contributes to the wear of the saw wire 3. In this sense, the Figure 13A variant of the wire saw 1 according to the invention, in which the guide device 5 comprises only eight rollers. The telescopic extensions 11, 12, 12b, 13, 13c and 14 are practically identical in this variant to the wire saw 1 according to the Figure 2-12 .

[0040] In this variant, the drive roller 20 additionally takes over the function of the deflection roller 7 of the one in the Figures 2 to 12 The wire saw 1 shown. The drive pulley 20 simultaneously remains an element of the wire storage unit 6d as a deflection pulley 10d. Because in this variant the saw wire 3 is guided diagonally from the deflection pulley 10 to the deflection pulley 10d, the following are eliminated compared to the one in the Figure 2-12 The wire saw 1 shown has two deflection pulleys and the number of deflections of the circulating saw wire is reduced by 20%, resulting in a corresponding reduction in wear of the saw wire 3. List of Bezuas characters

[0041] 1 Wire saw 2 Drive 3 Saw wire 4 Saw section 5 Guide device 6 Wire tensioning device, 6a, 6b, 6c, 6d Wire storage 7 7a First pulley pair 8 8b Second pulley pair 9 9c Third pulley pair 10 10d Fourth pulley pair 11 First telescopic extension 12 12b Second telescopic extension 13 13c Third telescopic extension 14 Fourth telescopic extension 15 Changeover device 16 Telescopic loader 17 Suspension 18 Perforated plate 19 Base 20 Drive pulley 21 Protective cover 22 Additional pulley 23 Additional pulley 24 Rotary device 25 Working cylinder (hydraulic cylinder, pneumatic cylinder) 26 Swivel joint 27 Swivel device 28 Tensioning cylinder 29 Extension box 30 Working cylinder housing 31 Cable pulls W Workpiece A First direction of movement B Second direction of movement C Third direction of movement D fourth direction of movement

Claims

1. A wire saw (1) for cutting a solid workpiece (W), such as a block of concrete or stone, with - at least one sawing wire (3) driven by a drive (2), wherein the sawing wire (3) forms a sawing section (4) for engagement in the workpiece (W) to be cut, - at least one guide device (5) for guiding the driven sawing wire (3), wherein the guide device (5) is designed to position the sawing section (4) of the driven sawing wire (3) relative to the workpiece (W), wherein the guide device (5) allowing several independent directions of movement (A, B, C, D), so that, in addition to an infeed of the sawing section (4) in the direction of the workpiece (W) to be cut, at least an extension or shortening of the formed cutting section (4) is possible, at least one wire storage and wire tensioning device (6) for taking up and releasing and tensioning the sawing wire (3) when the position and / or length of the sawing section (4) is changed by the guide device (5), wherein the guide device (5) has two main telescopic extensions (12, 12b, 13, 13c), via which the infeed of the sawing section (4) in the direction of the workpiece (W) to be cut takes place, wherein the main telescopic extensions (12, 12b, 13, 13c) of the guide device (5) being variable at a distance from each other in order to change the length of the sawing section (4), characterized in that the guide device (5) has a separate wire store (6a, 6b, 6c, 6d) for each of the directions of movement (A, B, C, D) each of which being associated with a single direction of movement (A, B, C, D).

2. Wire saw (1) according to claim 1, characterized in that the guide device (5) has a wire storage device (6a, 6b, 6c, 6d) formed from at least one pair of guide rollers (7, 7a, 8, 8b, 9, 9c, 10, 10d) for each of the directions of movement (A, B, C, D).

3. Wire saw (1) according to claim 2, characterized in that the pair of guide rollers (7, 7a, 8, 8b, 9, 9c, 10, 10d) of a wire storage device (6a, 6b, 6c, 6d) via an increasing and decreasing the distance between the rollers of the combined in pairs to the wire storage (6a, 6b, 6c, 6d) combined guide rollers (7, 7a, 8, 8b, 9, 9c, 10, 10d) stores or releases sawing wire (3) when the position and / or length of the sawing section (4) is changed.

4. Wire saw (1) according to claim 2 or 3, characterized in that the distance of the rollers of the combined in pairs to form the wire storage (6a, 6b, 6c, 6d) guide rollers (7, 7a, 8, 8b, 9, 9c, 10, 10d) can be adjusted via telescopic extensions (11, 11a, 12, 12b, 13, 14), on which at least one guide roller (7a, 8, 8b, 9, 9c, 10) is arranged.

5. Wire saw (1) according to any one of claims 2 to 4, characterized in that the distance of the rollers of the combined in pairs to form the wire storage (6a, 6b, 6c, 6d) guide rollers (7, 7a, 8, 8b, 9, 9c, 10, 10d) can be adjusted via telescopic extensions (11, 11a, 12, 12b, 13, 14), on which both guide rollers (7a, 8, 8b, 9, 9c, 10) are arranged.

6. Wire saw (1) according to any one of the preceding claims, characterized in that the main telescopic extensions (12, 12b, 13, 13c) have guide rollers (8, 8b, 9, 9c) combined in pairs to form the wire storage (6b, 6c) 9, 9c) which can be adjusted in both directions in the extended position via the main telescopic extensions (12, 12b, 13, 13c) to infeed the sawing section (4) in the direction of the workpiece (W) to be cut.

7. Wire saw (1) according to any one of the preceding claims, characterized in that the main telescopic extensions (12, 12b, 13, 13c) can be moved independently of one another.