A slide rail guided cable cutting tool

Abstract

The present application relates to high-voltage cable construction tool technical field, especially to a slide rail guide type cable cutting tool, which comprises a guide sleeve, a guide arm, a band saw and a cable, two C-shaped supports are symmetrically fixed and connected on the top of the guide sleeve, the C-shaped support openings face the lower left, a plurality of rollers one are symmetrically rotatably installed on the upper left and right between the two C-shaped supports, the rollers one are rollingly connected with the outer wall of the cable, a rectangular slide block is vertically slidably installed in the guide sleeve, a roller assembly capable of pressing and rollingly connecting the outer wall of the cable is arranged on the top of the rectangular slide block, the rear end of the rear C-shaped support is fixedly connected with a vertical slide rail, the vertical slide rail is perpendicular to the axis of the cable, a slide seat is vertically slidably installed on the vertical slide rail, the right end of the slide seat is detachably fixedly connected with the guide arm, the guide arm is fixedly installed on the band saw, and the cutting section of the band saw blade is arranged in parallel with the vertical slide rail, the present application provides a cutting tool capable of ensuring the flatness of the cable cutting surface.

Description

Technical Field

[0001] This invention relates to the field of high-voltage cable construction tools, and in particular to a slide rail guided cable cutting tool. Background Technology

[0002] During the installation of high-voltage cable accessories, after circumferentially peeling off the corrugated aluminum sheath, the cable end face needs to be cut to facilitate subsequent processes such as conductor crimping. The flatness of the cut end face directly affects the contact quality of the conductor crimping surface. Currently, portable band saws are commonly used for cable cutting on construction sites. The band saw has a guide arm at the front end, which is parallel to the saw blade. The operator judges whether the saw blade is perpendicular to the cable axis by observing the guide arm. However, this control method, which relies on manual visual inspection and experience, has obvious shortcomings: First, the accuracy of manual visual inspection is limited, and it is difficult for the operator to maintain the absolute perpendicularity between the band saw and the cable throughout the entire cutting process. Even a slight deviation will cause the conductor end face to be skewed, affecting the tightness of the subsequent conductor crimping surface; Second, the band saw lacks external forced guiding constraint during the cutting process, and uneven force on the saw blade can easily cause lateral swing, exacerbating the unevenness of the cut surface. Summary of the Invention

[0003] The purpose of this invention is to provide a slide rail-guided cable cutting tool to solve the technical problems existing in the background art.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A guide-guided cable cutting tool includes: a guide sleeve, a vertical slide rail, a guide arm, a band saw, and a cable. Two C-shaped brackets are symmetrically fixedly connected to the front and rear sides of the top of the guide sleeve. The openings of the C-shaped brackets face downwards to the left. Several rollers are symmetrically and rotatably mounted on the upper left and right sides between the two C-shaped brackets. The rollers are in rolling contact with the outer wall of the cable. A rectangular slider is vertically slidably mounted inside the guide sleeve. The top of the rectangular slider is equipped with a roller assembly capable of pressing and rolling against the outer wall of the cable. A vertical slide rail is fixedly connected to the upper rear end of the rear C-shaped bracket. The vertical slide rail is perpendicular to the axis of the cable. A slide block is vertically slidably mounted on the vertical slide rail. A guide arm is detachably fixedly connected to the right end of the slide block. The guide arm is fixedly mounted on the band saw, and the cutting section of the band saw blade is parallel to the vertical slide rail.

[0005] Furthermore, it also includes: a C-shaped connecting plate, wherein two C-shaped brackets are fixedly connected to the front and rear ends of the C-shaped connecting plate respectively, and the arc-shaped outer end face of the C-shaped connecting plate is flush with the arc-shaped outer end face of the C-shaped bracket.

[0006] Furthermore, it also includes: a roller, which is rotatably connected between the two C-shaped supports via the roller; the roller extends out of the arc-shaped inner wall of the C-shaped support.

[0007] Furthermore, the guide sleeve has a vertically penetrating rectangular guide hole, and the rectangular slider is vertically penetrating and slidably connected in the rectangular guide hole. The top end of the rectangular slider is located above the guide sleeve, and the bottom end of the rectangular slider is located below the guide sleeve.

[0008] Furthermore, it also includes: an end plate, an adjusting rod, a knob, a fine-tuning slider, a bearing, and a rectangular connecting block. The left end of the rectangular slider has a rectangular groove that extends to the bottom end of the slider. The bottom end of the rectangular slider is fixedly connected to an end plate, which has a vertically penetrating internal threaded hole. The upper part of the outer wall of the adjusting rod has an external threaded groove. The adjusting rod passes through the internal threaded hole, and its external threaded groove is threadedly connected to the internal threaded hole. The bottom end of the adjusting rod is fixedly connected to a knob. The top end of the rectangular slider has a vertically penetrating rectangular through-hole that communicates with the rectangular groove. The rectangular connecting block is fixedly connected to the top end of the fine-tuning slider, and the fine-tuning slider is vertically slidably connected within the rectangular through-hole. The upper end of the adjusting rod is rotatably mounted in a circular mounting groove at the top end of the fine-tuning slider via a bearing. The roller assembly is detachably fixedly mounted on the rectangular connecting block.

[0009] Furthermore, the roller assembly includes: a U-shaped sleeve, an L-shaped bracket, a second roller, and a second roller. The U-shaped sleeve is detachably sleeved and fixed on the rectangular connecting block. Two L-shaped brackets are provided, and the two L-shaped brackets are symmetrically fixed and connected to the front and rear sides of the top of the U-shaped sleeve. The second roller is rotatably installed between the two L-shaped brackets through the second roller, and the second roller rolls the outer wall of the connecting cable.

[0010] Furthermore, it also includes: bolts and nuts, wherein the bolts penetrate longitudinally through the spiral sleeve and the rectangular connecting block respectively, and the nuts are threadedly connected to one side of the outer wall of the spiral sleeve.

[0011] Furthermore, it also includes: a rotating shaft, a pawl, a triangular support, and a spring. The left end of the guide sleeve has a rectangular through hole two extending from the left to the inside of the rectangular guide hole. The width of the pawl is smaller than the width of the rectangular groove. The pawl is rotatably installed in the rectangular through hole two via the rotating shaft. The pawl is formed by a pressing head, a vertical block, and a triangular locking head connected in sequence. The outer wall of the adjusting rod is located above the external thread groove and has several annular slots evenly spaced along the height direction of the adjusting rod. The triangular locking head in the pawl engages with the annular slots. The lower end of the inner wall of the rectangular through hole two is fixedly connected to a triangular support. The inclined surface of the triangular support faces upward to the left. One end of the spring is fixedly connected to the inclined surface of the triangular support, and the other end is fixedly connected to the inner end face of the pressing head in the pawl.

[0012] Furthermore, the slide block includes: a vertical slider and a mounting plate. Several vertical sliders are provided, and the several vertical sliders are symmetrically and detachably fixed to the front end of the mounting plate. The several vertical sliders are vertically slidably connected to the left and right sides of the vertical slide rail. Among them, the several vertical sliders on the right side are detachably and fixedly connected to the upper part of the guide arm. The lower part of the guide arm is detachably and fixedly connected to the band saw.

[0013] Furthermore, the band saw is model 2107FK; the lower end of the guide arm is provided with a U-shaped groove with the opening facing downwards, and the band saw moves through the U-shaped groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the cooperation of a vertical slide rail and a slide block, forcibly constrains the movement direction of the band saw blade within a plane perpendicular to the cable axis, fundamentally solving the problem of end-face misalignment caused by manual visual control. The cut conductor end face is flat and smooth, providing a good contact surface for subsequent conductor crimping.

[0015] 2. This invention employs roller one and roller two to contact the cable surface respectively, maintaining guiding constraints while not restricting the band saw's small-amplitude rotation and oscillation around the cable axis. Operators can use a reciprocating oscillation method for cutting, utilizing the coordinated cutting efforts of both sides of the saw blade to significantly increase cutting speed, while the cut end face remains perpendicular.

[0016] 3. When using this invention, simply hold the rotation limiting device, which consists of a guide sleeve, a C-shaped bracket, a roller, a wheel, a rectangular slider, an end plate, an adjusting rod, a knob, a fine-tuning slider, a bearing, a rectangular connecting block, a roller assembly, a rotating shaft, a pawl, and a spring, tightly against the cable, and insert the slide block into the vertical slide rail to begin cutting. No permanent modifications to the band saw are required, making it suitable for rapid deployment and repeated use on construction sites. By scaling the main body size proportionally, this invention can be extended to cable cutting at voltage levels of 220kV and above. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a bottom view of the present invention; Figure 3 This is a structural schematic diagram of the guide sleeve and its components of the present invention; Figure 4 This is a cross-sectional view of the guide sleeve and its components of the present invention; Figure 5 This is a schematic diagram of the vertical guide rail and its components in this invention.

[0018] The labels in the attached diagram are as follows: 1-Guide sleeve, 101-Rectangular guide hole, 102-Rectangular through hole two, 2-C-shaped bracket, 3-C-shaped connecting plate, 4-Roll one, 5-Roll one, 6-Rectangular slider, 601-Rectangular groove, 7-End plate, 8-Adjusting rod, 801-External thread groove, 802-Annular groove, 9-Knob, 10-Fine adjustment slider, 11-Bearing, 12-Rectangular connecting block, 13-U-shaped sleeve, 14-Bolt, 15-Nut, 16-L-shaped bracket, 17-Roll two, 18-Roll two, 19-Rotating shaft, 20-Pawl, 21-Spring, 22-Vertical slide rail, 23-Vertical slider, 24-Mounting plate, 25-Guide arm, 26-Band saw, 27-Cable. Detailed Implementation

[0019] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings, taking a 110kV cross-linked polyethylene insulated welded corrugated aluminum-sheathed polyethylene power cable (model YJLW03-Z64 / 110kV 1×800mm²) as an example.

[0020] See Figures 1-5 As shown, a slide rail guided cable cutting tool includes: a guide sleeve 1, a vertical slide rail 22, a guide arm 25, a band saw 26, and a cable 27. Two C-shaped brackets 2 are symmetrically fixed to the front and rear sides of the top of the guide sleeve 1. The C-shaped brackets 2 and the guide sleeve 1 are made of high-strength aluminum alloy (grade 7075-T6). The opening of the C-shaped bracket 2 faces downward to the left, and the inner diameter of the opening of the C-shaped bracket 2 is designed to be 115mm, suitable for the outer diameter of a 110kV cable (approximately 111mm). Several rollers 5 are symmetrically and rotatably installed on the upper left and right sides between the two C-shaped brackets 2. The rollers 5 are in rolling contact with the outer wall of the cable 27. A rectangular slider 6 is vertically and slidably installed inside the guide sleeve 1. The top of the slider 6 is equipped with a roller assembly that can press and roll the outer wall of the connecting cable 27; the upper rear end of the rear C-shaped bracket 2 is fixedly connected to a vertical slide rail 22, which is an aluminum alloy linear guide rail with a length of 300mm, and is fixedly connected to the rear C-shaped bracket 2 by welding or screws; the vertical slide rail 22 is perpendicular to the axis of the cable 27, and a slide block is vertically slidably mounted on the vertical slide rail 22. The right end of the slide block is detachably fixedly connected to a guide arm 25, which is made of aluminum alloy and whose installation interface is consistent with the original band saw guide arm interface size; the guide arm 25 is fixedly mounted on the band saw 26, and the cutting section of the band saw blade is set parallel to the vertical slide rail 22.

[0021] The slide rail guided cable cutting tool also includes: a C-shaped connecting plate 3, with two C-shaped brackets 2 fixedly connected to the front and rear ends of the C-shaped connecting plate 3 facing each other, and the arc-shaped outer end face of the C-shaped connecting plate 3 being flush with the arc-shaped outer end face of the C-shaped bracket 2.

[0022] The slide rail guided cable cutting tool also includes: roller 4, and roller 5 is rotatably connected between two C-shaped brackets 2 via roller 4; roller 5 extends out of the arc-shaped inner wall of C-shaped bracket 2.

[0023] The guide sleeve 1 has a vertically penetrating rectangular guide hole 101. The rectangular slider 6 is vertically penetrating and slidably connected in the rectangular guide hole 101. The top of the rectangular slider 6 is located above the guide sleeve 1, and the bottom of the rectangular slider 6 is located below the guide sleeve 1.

[0024] The slide rail guided cable cutting tool also includes: an end plate 7, an adjusting rod 8, a knob 9, a fine-tuning slider 10, a bearing 11, and a rectangular connecting block 12. A rectangular groove 601 is provided at the left end of the rectangular slider 6, extending to the bottom end of the slider 6. The end plate 7 is fixedly connected to the bottom end of the rectangular slider 6, and a vertically penetrating internal threaded hole is provided on the end plate 7. An external threaded groove 801 is provided on the upper part of the outer wall of the adjusting rod 8, and the adjusting rod 8 passes through the internal threaded hole, with the external threaded groove 801 threadedly connected to the internal threaded hole. A knob 9 is fixedly connected to the bottom end of the adjusting rod 8. A vertically penetrating rectangular through-hole is provided at the top end of the rectangular slider 6, communicating with the rectangular groove 601. The rectangular connecting block 12 is fixedly connected to the top end of the fine-tuning slider 10, which slides vertically within the rectangular through-hole. The upper end of the adjusting rod 8 is rotatably mounted in a circular mounting groove at the top end of the fine-tuning slider 10 via a bearing 11. The roller assembly is detachably fixedly mounted on the rectangular connecting block 12.

[0025] The roller assembly includes: a U-shaped sleeve 13, an L-shaped bracket 16, a second roller 17, and a second roller 18. The U-shaped sleeve 13 is detachably fitted and fixed on the rectangular connecting block 12. There are two L-shaped brackets 16, which are symmetrically fixed and connected to the front and rear sides of the top of the U-shaped sleeve 13. The second roller 18 is rotatably installed between the two L-shaped brackets 16 via the second roller 17. The second roller 18 rolls the outer wall of the connecting cable 27. The first roller 5 and the second roller 18 are both made of bearing steel GCr15, with an outer diameter of 12mm and an axial length of 50mm. Both ends are supported by miniature deep groove ball bearings (model 618 / 8) and can rotate freely around their own axis.

[0026] The slide rail guided cable cutting tool also includes: bolt 14 and nut 15. Bolt 14 passes longitudinally through the loop sleeve 13 and the rectangular connecting block 12 respectively, and nut 15 is threadedly connected to one side of the outer wall of the loop sleeve 13.

[0027] The slide rail guided cable cutting tool also includes: a rotating shaft 19, a pawl 20, a triangular support, and a spring 21. The left end of the guide sleeve 1 has a rectangular through hole 102 that extends from the left to the inside of the rectangular guide hole 101. The width of the pawl 20 is smaller than the width of the rectangular groove 601. The pawl 20 is rotatably installed in the rectangular through hole 102 via the rotating shaft 19. The pawl 20 is formed by a pressing head, a vertical block, and a triangular locking head that are fixedly connected in sequence. The outer wall of the adjusting rod 8 is located above the external thread groove 801 and has several annular slots 802 that are evenly spaced along the height direction of the adjusting rod 8. The triangular locking head in the pawl 20 engages with the annular slots 802. The lower end of the inner wall of the rectangular through hole 102 is fixedly connected to a triangular support. The inclined surface of the triangular support faces the upper left. One end of the spring 21 is fixedly connected to the inclined surface of the triangular support, and the other end is fixedly connected to the inner end face of the pressing head in the pawl 20.

[0028] The slide includes a vertical slider 23 and a mounting plate 24. Several vertical sliders 23 are provided, and the several vertical sliders 23 are symmetrically and detachably fixed to the front end of the mounting plate 24. The several vertical sliders 23 are vertically slidably connected to the left and right sides of the vertical slide rail 22. Among them, the several vertical sliders 23 on the right side are detachably fixed to the upper part of the guide arm 25. The lower part of the guide arm 25 is detachably fixed to the band saw 26.

[0029] The band saw 26 is model 2107FK, and most band saws with guide arms 25 can also be selected; the lower end of the guide arm 25 has a U-shaped groove with an opening facing downwards, and the band saw 26 moves through the U-shaped groove.

[0030] Working principle: In use, first, insert the opening of the C-shaped bracket 2 radially into the vicinity of the cable to be cut, so that at least two symmetrical rollers 1 5 and one roller 2 18 are in contact with the cable surface; the rotation limiting device, consisting of a guide sleeve, C-shaped bracket, roller 1, roller 1, rectangular slider, end plate, adjusting rod, knob, fine-tuning slider, bearing, rectangular connecting block, roller assembly, rotating shaft, pawl and spring, can rotate freely around the cable 27 axis on the cable surface, making it easy to adjust to the position where the vertical slide rail 22 is perpendicular to the cable 27 axis; then remove the original guide arm of the band saw 26, install the new guide arm 25 on the front mounting seat of the band saw 26, and insert several vertical sliders 23 into the vertical slide rail 22; after starting the band saw 26, the operator holds the band saw 26 and slides the vertical sliders 23 along the vertical slide rail 22, and the saw blade cuts the cable in a plane perpendicular to the cable axis. During the cutting process, the operator can swing the band saw 26 slightly left and right around the axis of the cable 27 (swing amplitude of approximately ±5° to ±10°) as needed, so as to improve cutting efficiency by utilizing the coordinated cutting on both sides of the saw blade. The sliding cooperation between the vertical slide rail 22 and the vertical slider 23 ensures that the saw blade always remains in the vertical plane and the cut end face always remains flat.

[0031] After cutting, remove the vertical slider 23 from the vertical slide rail 22, and release the rotation limit device to remove the entire assembly. The new guide arm 25 can be retained on the band saw 26 for a long time without affecting the normal use of the band saw 26 in other scenarios. When multiple cuts are required on the same cable (such as multi-segment cuts), simply move the rotation limit device along the axis of the cable 27 to the next cutting position and re-clamp it; there is no need to repeatedly disassemble and replace the guide arm 25.

[0032] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solution of the present invention, based on the technical essence of the present invention, shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A slide rail guided cable cutting tool, characterized in that, include: The guide sleeve (1), vertical slide rail (22), guide arm (25), band saw (26), and cable (27) are provided. Two C-shaped brackets (2) are symmetrically fixed to the front and rear sides of the top of the guide sleeve (1). The openings of the C-shaped brackets (2) face downwards to the left. Several rollers (5) are symmetrically mounted on the upper left and right sides between the two C-shaped brackets (2). The rollers (5) are in rolling connection with the outer wall of the cable (27). A rectangular slider (6) is vertically slidably mounted inside the guide sleeve (1). The top of the cable (27) is provided with a roller assembly that can press and roll the outer wall of the cable (27); the upper part of the rear end of the C-shaped bracket (2) is fixedly connected to a vertical slide rail (22), the vertical slide rail (22) is perpendicular to the axis of the cable (27), a slide block is vertically slidably installed on the vertical slide rail (22), a guide arm (25) is detachably fixedly connected to the right end of the slide block, the guide arm (25) is fixedly installed on the band saw (26), and the cutting section of the band saw (26) blade is arranged parallel to the vertical slide rail (22).

2. The slide rail guided cable cutting tool according to claim 1, characterized in that: Also includes: C-shaped connecting plate (3), with two C-shaped brackets (2) fixedly connected to the front and rear ends of the C-shaped connecting plate (3) respectively, and the arc-shaped outer end face of the C-shaped connecting plate (3) is flush with the arc-shaped outer end face of the C-shaped bracket (2).

3. The slide rail guided cable cutting tool according to claim 1, characterized in that: Also includes: Roller 1 (4) and roller 1 (5) are rotatably connected between two C-shaped brackets (2) via roller 1 (4); roller 1 (5) extends out of the arc inner wall of C-shaped bracket (2).

4. The slide rail guided cable cutting tool according to claim 1, characterized in that: The guide sleeve (1) has a vertically penetrating rectangular guide hole (101), and the rectangular slider (6) is vertically penetrating and slidably connected in the rectangular guide hole (101). The top of the rectangular slider (6) is located above the guide sleeve (1), and the bottom of the rectangular slider (6) is located below the guide sleeve (1).

5. A slide rail guided cable cutting tool according to claim 1, characterized in that: Also includes: The structure includes an end plate (7), an adjusting rod (8), a knob (9), a fine-tuning slider (10), a bearing (11), and a rectangular connecting block (12). A rectangular groove (601) is provided at the left end of the rectangular slider (6), extending to the bottom of the slider (6). An end plate (7) is fixedly connected to the bottom of the slider (6). A vertically penetrating internal threaded hole is provided on the end plate (7). An external threaded groove (801) is provided on the upper part of the outer wall of the adjusting rod (8). The adjusting rod (8) passes through the internal threaded hole, and its external threaded groove (801) is connected to... The internal threaded hole is threaded, and the bottom end of the adjusting rod (8) is fixedly connected to a knob (9). The top end of the rectangular slider (6) is provided with a rectangular through hole that is vertically penetrating and connected to the rectangular groove (601). The rectangular connecting block (12) is fixedly connected to the top end of the fine-tuning slider (10). The fine-tuning slider (10) is vertically slidably connected in the rectangular through hole. The upper end of the adjusting rod (8) is rotatably installed in the circular mounting groove opened at the top end of the fine-tuning slider (10) through the bearing (11). The roller assembly is detachably fixedly installed on the rectangular connecting block (12).

6. A slide rail guided cable cutting tool according to claim 5, characterized in that: The roller assembly includes: a spiral sleeve (13), an L-shaped bracket (16), a second roller (17), and a second roller (18). The spiral sleeve (13) is detachably sleeved and fixed on the rectangular connecting block (12). There are two L-shaped brackets (16), which are symmetrically fixed on the front and rear sides of the top of the spiral sleeve (13). The second roller (18) is rotatably installed between the two L-shaped brackets (16) through the second roller (17). The second roller (18) rolls the outer wall of the connecting cable (27).

7. A slide rail guided cable cutting tool according to claim 6, characterized in that: Also includes: Bolt (14) and nut (15), wherein the bolt (14) passes longitudinally through the spiral sleeve (13) and the rectangular connecting block (12) respectively and the nut (15) is threaded to one side of the outer wall of the spiral sleeve (13).

8. A slide rail guided cable cutting tool according to claim 5, characterized in that: Also includes: The guide sleeve (1) has a rotating shaft (19), a pawl (20), a triangular support, and a spring (21). The left end of the guide sleeve (1) has a rectangular through-hole (102) extending in the left-right direction to the inside of the rectangular guide hole (101). The width of the pawl (20) is less than the width of the rectangular groove (601). The pawl (20) is rotatably mounted in the rectangular through-hole (102) via the rotating shaft (19). The pawl (20) is formed by a pressing head, a vertical block, and a triangular locking head connected in sequence. The adjusting rod (8... The outer wall of the pawl (20) is located above the external thread groove (801) and has several annular slots (802) at equal intervals along the height direction of the adjusting rod (8). The triangular pawl in the pawl (20) engages with the annular slots (802). The lower end of the inner wall of the rectangular through hole (102) is fixedly connected to a triangular support. The inclined surface of the triangular support faces the upper left. One end of the spring (21) is fixedly connected to the inclined surface of the triangular support, and the other end is fixedly connected to the inner end face of the pressing head in the pawl (20).

9. A slide rail guided cable cutting tool according to claim 1, characterized in that: The slide block includes a vertical slider (23) and a mounting plate (24). Several vertical sliders (23) are provided. Several vertical sliders (23) are symmetrically and detachably fixed to the front end of the mounting plate (24). Several vertical sliders (23) are vertically slidably connected to the left and right sides of the vertical slide rail (22). Among them, several vertical sliders (23) on the right side are detachably fixed to the upper part of the guide arm (25). The lower part of the guide arm (25) is detachably fixed to the band saw (26).

10. A slide rail guided cable cutting tool according to claim 1, characterized in that: The band saw (26) is model 2107FK; the lower end of the guide arm (25) is provided with a U-shaped groove with the opening facing downward, and the band saw (26) moves through the U-shaped groove.

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