Slope anti-landslide device for expressway

Abstract

The application relates to the technical field of road engineering, in particular to a slope anti-landslide device for expressways, which comprises a center ring, sliding blocks are fixedly arranged in the inner wall of the center ring in a symmetrical mode, side rods are fixedly arranged on the side walls of the center ring in a uniform and equidistant mode, an insertion slot is formed in the end of each of the four side rods away from the center ring, a limiting slot is formed in the inner wall of each of the four insertion slots, a first connecting framework is arranged in front of and behind the side rod, a first inner slot is formed in the inside of each of the two first connecting frameworks, a second connecting framework is arranged on the left and right sides of the side rod, a second inner slot is symmetrically formed in the opposite end of each of the two second connecting frameworks, and the two ends of the two first connecting frameworks are slidably arranged in the two groups of second inner slots; the first connecting framework, the sliding strip and the side rod are designed in a plug-in mode, the dislocation or sliding between the various connecting components is not prone to occurring, and therefore the stability of the whole device is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of road engineering technology, and in particular to a slope anti-slip device for highways. Background Technology

[0002] Slopes are natural or man-made slopes, one of the most basic geological environments in human engineering activities, and also the most common engineering form in engineering construction. In my country, highways often pass through rugged areas such as hills and mountains. When roads pass through these areas, slopes are formed on both sides of the road. In hilly and mountainous areas, these slopes are relatively steep, mainly covered with shrubs and weeds, and in some places, these colluvial deposits are covered with rock surfaces and accompanied by loose rocks, which seriously affect the safety of vehicles traveling on highways. Slope protection is necessary.

[0003] Traditional slope protection structures typically involve concrete pouring and planting vegetation. Concrete pouring is costly and environmentally unfriendly, and transporting large quantities of concrete is very inconvenient in remote areas. Anti-slope devices have a fixed structure and low overall strength, making it impossible to adjust them according to the geographical conditions of the actual installation site. Furthermore, on-site installation is cumbersome, time-consuming, and inefficient. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a slope anti-slip device for highways.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a slope anti-slip device for highways, comprising a central ring, wherein sliders are symmetrically fixedly installed in the inner wall of the central ring, and side rods are uniformly and equidistantly fixedly installed on the side wall of the central ring. Each of the four side rods has a slot at one end away from the central ring, and a limit groove is formed through the inner wall of each of the four slots. A first connecting frame is provided in front of and behind each side rod, and a first inner groove is formed inside each of the two first connecting frames. A second connecting frame is provided in the left and right sides of each side rod, and a second inner groove is symmetrically formed on the opposite ends of the two second connecting frames. The two ends of the two first connecting frames are slidably installed in the two sets of second inner grooves respectively.

[0006] Both of the second connecting frames have a sliding insertion mechanism installed inside.

[0007] The insertion mechanism includes slide bars, two slide bars are respectively slidably disposed in two second connecting frames, each slide bar has a third inner groove, and each slide bar has a first screw threadedly installed inside.

[0008] As a preferred embodiment of the present invention, a turntable is fixedly installed on the opposite ends of the two first screws, and the two turntables are respectively rotatably housed in the two second connecting frames, and a fourth inner groove is opened through the interior of the two slide bars.

[0009] As a preferred embodiment of the present invention, a U-shaped frame is fixedly installed at the center of the two sets of first inner grooves and fourth inner grooves, and column grooves are symmetrically opened on the side wall of each U-shaped frame, with each set of column grooves being distributed one above the other.

[0010] As a preferred embodiment of the present invention, springs are fixedly installed on both sides of each U-shaped frame, and wedge blocks are fixedly installed on the end of each set of springs away from each U-shaped frame. The four sets of wedge blocks are respectively slidably disposed in four fourth inner grooves.

[0011] As a preferred embodiment of the present invention, the four sets of wedge blocks are respectively adapted to the four sets of limiting grooves, and a sliding column is fixedly installed on the opposite end of each set of wedge blocks. Each set of sliding columns is slidably disposed in each set of column grooves, and a protective net is provided above the second connecting frame and the first connecting frame.

[0012] As a preferred embodiment of the present invention, a rod is provided inside the central ring, and first grooves are evenly spaced on the side wall of the rod. Two sliders are respectively slidably disposed in the two first grooves, and a second groove is provided in the inner wall of each first groove.

[0013] As a preferred embodiment of the present invention, the insert rod is threaded with a first internal threaded ring, a crossbar is slidably installed through the first groove, and limit strips are symmetrically fixedly installed on both sides of the crossbar.

[0014] As a preferred embodiment of the present invention, the two sets of limiting strips are respectively slidably disposed in the two sets of second sliding grooves, and the upper end of the crossbar is fitted with a second screw, the second screw being threadedly disposed in the insert rod.

[0015] As a preferred embodiment of the present invention, vertical bars are symmetrically fixedly installed at the lower end of the insertion rod, and a third screw is slidably installed inside each of the two vertical bars, with a second internal threaded ring threaded at both ends of the third screw.

[0016] As a preferred embodiment of the present invention, a plug is provided between the two vertical bars, and a third sliding groove is provided through the plug, and the third screw is slidably disposed in the third sliding groove.

[0017] Compared with the prior art, the beneficial effects that this invention can achieve are:

[0018] Firstly, by designing the first connecting frame and the slide bar to be plugged into the side rod, and designing the first connecting frame to be slidably embedded in the second inner groove, the entire protective frame will be on the same horizontal plane when the device is in use. Therefore, when a certain part is subjected to force, the device can transmit the force to the whole and distribute the force, making it less likely for the various connecting components to misalign or slip, thereby ensuring the overall stability of the device.

[0019] Secondly, through the design of limiting groove, U-shaped frame, column groove, spring and wedge block, the compression spring is compressed under the action of the wedge block. At this time, the wedge block will also drive the sliding column to slide inside the column groove on the U-shaped frame. When the wedge block slides into the limiting groove, the spring will restore its deformation and drive it to pop out, completing the snap-fit. This makes the equipment easy to install and disassemble during use, saves time and reduces the difficulty of operation for workers.

[0020] Thirdly, through the design of the second connecting frame, the second inner groove, the slide bar, the first screw, and the turntable, after the initial installation is completed, the two first screws can be rotated in sequence inside the two slide bars. The rotation of the two first screws will drive the two turntables fixed to them to rotate inside the second connecting frame. Since the first screw is threadedly connected to the slide bar, the two turntables will pull the two second connecting frames to slide outwards. At this time, the two first connecting frames will slide inside the second inner groove, thereby completing the adjustment. This makes the device suitable for slopes of any size and has a wider range of applications.

[0021] Fourth, through the design of the plug rod, vertical bar, second internal threaded ring and plug, the two second internal threaded rings will move inward under the rotation. At this time, the two second internal threaded rings will simultaneously squeeze the two vertical bars and deform them. Thus, the two vertical bars will fit with the plug and be fixed. This allows the length of the plug rod to increase, so that the installation tightness can be readjusted during reinstallation, thereby extending the service life of the equipment.

[0022] Fifth, through the design of the central ring, slider, first connecting frame, second connecting frame, insert rod, first slide groove, second slide groove, crossbar, slide bar, and second screw, the movement of the central ring will cause the slider to slide inside the first slide groove. The movement of the slider will cause the first and second connecting frames that are engaged with it to move upward, thereby adjusting the protection height. After adjustment, the second screw can be rotated inside the insert rod. The rotation of the second screw will press the crossbar downward. At this time, the crossbar will slide inside the first slide groove. The movement of the crossbar will cause the slide bar that is fixed to it to slide inside the second slide groove. The movement of the crossbar will fit against the upper end of the central ring, thereby completing the limiting and fixing of the central ring, making it easy to adjust the protection height of the device during use.

[0023] Sixth, after the equipment frame is installed, the protective net can be placed on top, and then the second connecting frame, the first connecting frame, and the side rods can be fixed to the protective net with bolts. The bolt connection makes the installation and disassembly of the protective net more convenient, and the segmented installation method makes it easy to replace a damaged part. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the exploded structure of the insertion rod connection of the present invention;

[0026] Figure 3 This is a schematic diagram of the protective net connection structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the exploded structure of the side rod connection of the present invention;

[0028] Figure 5 This is a schematic diagram of the exploded structure of the slider connection of the present invention;

[0029] Figure 6 This is a schematic diagram of the exploded structure of the U-shaped frame connection of the present invention;

[0030] Figure 7 This is a schematic diagram of the exploded structure of the second screw connection of the present invention;

[0031] Figure 8 This is a schematic diagram of the exploded structure of the vertical strip connection according to the present invention.

[0032] The components are as follows: 11. Central ring; 12. Slider; 13. Side rod; 14. Slot; 15. Limiting groove; 16. First connecting frame; 17. First inner groove; 18. Second connecting frame; 19. Second inner groove; 21. Sliding bar; 22. Third inner groove; 23. First screw; 24. Turntable; 25. Fourth inner groove; 31. U-shaped frame; 32. Column groove; 33. Spring; 34. Wedge block; 35. Sliding column; 36. Protective net; 41. Insert rod; 42. First sliding groove; 43. Second sliding groove; 44. First internal threaded ring; 45. Crossbar; 46. Limiting bar; 47. Second screw; 51. Vertical bar; 52. Third screw; 53. Second internal threaded ring; 54. Plug; 55. Third sliding groove. Detailed Implementation

[0033] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0034] Example:

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, a slope anti-slip device for highways includes a central ring 11. Slider blocks 12 are symmetrically fixedly installed on the inner wall of the central ring 11. Side rods 13 are evenly and equidistantly fixedly installed on the side walls of the central ring 11. Each of the four side rods 13 has a slot 14 at its end away from the central ring 11. A limiting groove 15 is formed through the inner wall of each of the four slots 14. First connecting frames 16 are provided at the front and rear of each side rod 13. Each of the two first connecting frames 16 has a first inner groove 17. Second connecting frames 18 are provided on the left and right sides of each side rod 13. The two second connecting frames 18 are positioned opposite each other. The two ends of the first connecting frame 16 are symmetrically provided with second inner grooves 19. The two ends of the first connecting frame 16 are slidably installed in the two sets of second inner grooves 19 respectively. By designing the first connecting frame 16 and the slide bar 21 to be plugged into the side rod 13, and designing the first connecting frame 16 to be slidably installed in the second inner groove 19, the entire protective frame will be on the same horizontal plane when the device is in use. Therefore, when a certain part is subjected to force, the device can transmit the force to the whole and distribute the force, so that the various connecting components are not prone to misalignment or slippage, thereby ensuring the overall stability of the device.

[0036] Both second connecting frames 18 have sliding insertion mechanisms installed inside them;

[0037] The insertion mechanism includes two slide bars 21, which are slidably housed within two second connecting frames 18. Each slide bar 21 has a third inner groove 22, and each slide bar 21 has a first screw 23 threadedly mounted inside it. A turntable 24 is fixedly mounted on the opposite end of each of the two first screws 23, and the two turntables 24 are rotatably housed within the two second connecting frames 18. Each slide bar 21 has a fourth inner groove 25 extending through it. After initial installation, the two first screws 23 can be rotated sequentially within the two slide bars 21. The screw 23, under the rotation of the two first screws 23, will drive the two fixed turntables 24 to rotate inside the second connecting frame 18. At this time, since the first screws 23 are threadedly connected to the slide bars 21, the two turntables 24 will pull the two second connecting frames 18 to slide outward. At this time, the two first connecting frames 16 will slide inside the second inner groove 19, thereby completing the adjustment. This makes the device suitable for slopes of any size, with a wider range of applications. The two sets of first inner grooves 17 and the second inner groove 28... U-shaped frames 31 are fixedly installed at the center of each of the four inner grooves 25. Each U-shaped frame 31 has symmetrically arranged column grooves 32 on its sidewalls, with each set of column grooves 32 arranged one above the other. Springs 33 are fixedly installed on both sidewalls of each U-shaped frame 31. A wedge block 34 is fixedly installed on the end of each spring 33 furthest from each U-shaped frame 31. The four sets of wedge blocks 34 are slidably disposed within the four fourth inner grooves 25, and each set of wedge blocks 34 is adapted to one of the four sets of limiting grooves 15. A [missing information - likely a device or tool] is fixedly installed on the opposite end of each set of wedge blocks 34. Each set of sliding columns 35 is slidably installed in each set of column grooves 32. A protective net 36 is installed above the second connecting frame 18 and the first connecting frame 16. After the equipment frame is installed, the protective net 36 can be placed on the top, and then the second connecting frame 18, the first connecting frame 16 and the side rod 13 are fixed to the protective net 36 by bolts. The bolt connection makes the installation and disassembly of the protective net 36 more convenient, and the segmented installation method makes it easy to replace a damaged part.

[0038] A rod 41 is provided inside the central ring 11. First grooves 42 are evenly spaced on the sidewalls of the rod 41. Two sliders 12 are slidably disposed within the two first grooves 42. A second groove 43 is provided within the inner wall of each first groove 42. A first internal threaded ring 44 is threaded onto the surface of the rod 41. A crossbar 45 is slidably installed through the first grooves 42. Limiting strips 46 are symmetrically fixed on both sidewalls of the crossbar 45. Two sets of limiting strips 46 are slidably disposed within the two sets of second grooves 43. A second screw 47 is attached to the upper end of the crossbar 45 and is threaded into the rod 41. Vertical bars 51 are symmetrically fixed on the lower end of the rod 41. A third screw 52 is slidably installed within each of the two vertical bars 51. Both ends of the 52 are threaded with second internal threaded rings 53. A plug 54 is provided between the two vertical bars 51. A third sliding groove 55 is opened through the plug 54. The third screw 52 is slidably installed in the third sliding groove 55. During installation, the insert rod 41 can be rotated according to the position of the slope that needs to be reinforced. When the insert rod 41 rotates, it will drive the vertical bar 51 fixed to it to rotate as well. Under the rotation of the vertical bar 51, the plug 54 will also rotate. When the plug 54 penetrates the concrete layer on the slope and is reinforced into the soil, the central ring 11 fitted on the insert rod 41 will move with the slope, thereby completing the slope protection. At this time, the first connecting frame 16 and the sliding bar 21 can be inserted into the four slots 14 respectively. The movement of the slider 21 will cause the U-shaped frame 31 fixed thereto to move as well. When the U-shaped frame 31 drives the wedge block 34 to slide into the slot 14, the wedge block 34 will be subjected to a compressive force. Under the action of the wedge block 34, the compression spring 33 will be compressed. At this time, the wedge block 34 will also drive the slider 35 to slide inside the column groove 32 on the U-shaped frame 31. When the wedge block 34 slides into the limiting groove 15, the spring 33 will restore its deformation and cause it to pop out, completing the locking. This makes the equipment easy to install and disassemble during use, saving time and reducing the difficulty of operation for workers. When the connection between the vertical bar 51 and the slope becomes poor after long-term use, it can be pulled out, and then the vertical bar can be moved downwards. 51. As the vertical bar 51 moves, the third screw 52 will slide downwards inside the third groove 55. At this time, two second internal threaded rings 53 can be rotated sequentially on the third screw 52. Under the rotation of the two second internal threaded rings 53, they will move inwards. At this time, the two second internal threaded rings 53 will simultaneously squeeze the two vertical bars 51, causing them to deform. Thus, the two vertical bars 51 will fit against the plug 54, thereby completing the fixation. This allows the length of the insertion rod 41 to increase accordingly, so that the installation tightness can be readjusted during reinstallation, thereby extending the service life of the equipment. In use, the first internal threaded ring 44 can be rotated on the insertion rod 41 first. Since the two are threadedly connected, the first internal threaded ring 44 will move upwards under the rotation of the first internal threaded ring 44.The movement of the first internal threaded ring 44 compresses the central ring 11, causing it to slide upwards. This movement of the central ring 11 then drives the slider 12 to slide within the first groove 42. The slider 12, in turn, causes the first connecting frame 16 and the second connecting frame 18, which are engaged with it, to move upwards, thus adjusting the protective height. After adjustment, the second screw 47 can be rotated inside the insert rod 41. The rotation of the second screw 47 compresses the crossbar 45 downwards, causing it to slide within the first groove 42. This movement of the crossbar 45 then drives the fixed limiting strip 46 to slide within the second groove 43. The crossbar 45 then comes into contact with the upper end of the central ring 11, thus fixing and limiting the central ring 11. This allows for easy adjustment of the protective height during use.

[0039] Working principle:

[0040] The first step involves rotating the insert rod 41 according to the location of the slope requiring reinforcement. As the insert rod 41 rotates, it causes the fixed vertical bar 51 to rotate as well. This rotation, in turn, causes the plug 54 to rotate. Once the plug 54 penetrates the concrete layer of the slope and embeds itself into the soil, the central ring 11 fitted onto the insert rod 41 will move along with the slope, thus completing the slope protection. At this point, the first connecting frame 16 and the sliding strip 21 can be inserted into the four slots 14 respectively. The movement of the first connecting frame 16 and the sliding strip 21 will then cause the... The fixed U-shaped frame 31 moves accordingly. When the U-shaped frame 31 drives the wedge block 34 to slide into the slot 14, the wedge block 34 will be subjected to a squeezing force. Under the action of the wedge block 34, the compression spring 33 will be compressed. At this time, the wedge block 34 will also drive the sliding column 35 to slide in the column groove 32 on the U-shaped frame 31. When the wedge block 34 slides into the limiting groove 15, the spring 33 will restore its deformation and push it out to complete the snap-fit. This makes the equipment easy to install and disassemble during use, saves time, and reduces the difficulty of operation for the staff.

[0041] The second step involves rotating the two first screws 23 inside the two slide bars 21. The rotation of the two first screws 23 will drive the two fixed turntables 24 to rotate inside the second connecting frame 18. Since the first screws 23 are threadedly connected to the slide bars 21, the two turntables 24 will pull the two second connecting frames 18 to slide outward. At this time, the two first connecting frames 16 will slide inside the second inner groove 19, thereby completing the adjustment. This makes the device suitable for slopes of any size and has a wider range of applications.

[0042] Thirdly, when the connection between the vertical bar 51 and the slope deteriorates after long-term use, it can be pulled out. Then, the vertical bar 51 can be moved downwards. As the vertical bar 51 moves, the third screw 52 will slide downwards inside the third groove 55. At this time, the two second internal thread rings 53 can be rotated in sequence on the third screw 52. As the two second internal thread rings 53 rotate, they will move inwards. At this time, the two second internal thread rings 53 will simultaneously squeeze the two vertical bars 51 and deform them. Thus, the two vertical bars 51 will fit with the plug 54, thereby completing the fixation. This allows the length of the plug rod 41 to increase accordingly, so that the installation tightness can be readjusted during reinstallation, thereby extending the service life of the equipment.

[0043] Fourthly, during use, the first internal threaded ring 44 can be rotated on the insertion rod 41. Since the two are threadedly connected, the first internal threaded ring 44 will move upward under the rotation. Under the movement of the first internal threaded ring 44, the central ring 11 will be squeezed and slide upward. Under the movement of the central ring 11, the slider 12 will slide inside the first slide groove 42. Under the movement of the slider 12, the first connecting frame 16 and the second connecting frame 18 that are engaged with it will move upward, thereby adjusting the protection height. After the adjustment is completed, the second screw 47 can be rotated inside the insertion rod 41. Under the rotation of the second screw 47, the crossbar 45 will be squeezed downward. At this time, the crossbar 45 will slide inside the first slide groove 42. Under the movement of the crossbar 45, the limiting strip 46 that is fixed with it will slide inside the second slide groove 43. Under the movement of the crossbar 45, it will fit against the upper end of the central ring 11, thereby completing the limiting and fixing of the central ring 11, making it easy to adjust the protection height when using the device.

[0044] Fifth step: After the equipment frame is installed, the protective net 36 can be placed on top, and then the second connecting frame 18, the first connecting frame 16 and the side rod 13 are fixed to the protective net 36 with bolts. The bolt connection makes the installation and disassembly of the protective net 36 more convenient, and the segmented installation method makes it easy to replace a damaged part.

[0045] The sixth step involves designing the first connecting frame 16 and the slide bar 21 to be plugged into the side rod 13, and designing the first connecting frame 16 to be slidably embedded in the second inner groove 19. This ensures that the entire protective frame is on the same horizontal plane during use. Therefore, when a certain part is subjected to force, the device can transmit the force to the whole and distribute the force, making it less likely for the connecting components to misalign or slip, thus ensuring the overall stability of the device.

[0046] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A slope anti-slip device for highways, comprising a central ring (11), wherein sliders (12) are symmetrically fixedly installed in the inner wall of the central ring (11), characterized in that: Side rods (13) are evenly and equidistantly fixedly installed on the side wall of the central ring (11). Each of the four side rods (13) has a slot (14) at the end away from the central ring (11). Each of the four slots (14) has a limit groove (15) through the inner wall. A first connecting frame (16) is provided in front of and behind the side rod (13). A first inner groove (17) is provided inside each of the two first connecting frames (16). A second connecting frame (18) is provided in the left and right sides of the side rod (13). A second inner groove (19) is symmetrically provided on the opposite ends of the two second connecting frames (18). The two ends of the two first connecting frames (16) are slidably installed in the two sets of second inner grooves (19). Both of the second connecting frames (18) have a plug-in mechanism slidably installed inside; The insertion mechanism includes two slide bars (21), which are slidably housed within two second connecting frames (18). Each slide bar (21) has a third inner groove (22) inside. Each slide bar (21) has a first screw (23) threadedly installed inside. Each of the two first screws (23) has a turntable (24) fixedly installed on its opposite end. Each turntable (24) is rotatably housed within the two second connecting frames (18). Each slide bar (21) has a fourth inner groove (25) extending through it. U-shaped frames (31) are fixedly installed at the center of the two sets of first inner grooves (17) and fourth inner grooves (25). Each U-shaped frame (31) has a column groove (32) symmetrically opened on its side wall. Each set of column grooves (32) is distributed one above the other. Each U-shaped frame (31) has a spring (33) fixedly installed on both side walls. Each set of springs (33) has a wedge block (34) fixedly installed on the end away from each U-shaped frame (31). The four sets of wedge blocks (34) are slidably installed in the four fourth inner grooves (25). The central ring (11) is provided with a rod (41) inside. The rod (41) has a first groove (42) evenly spaced on its side wall. The two sliders (12) are respectively slidably installed in the two first grooves (42). A second groove (43) is provided in the inner wall of each first groove (42). Vertical bars (51) are symmetrically fixedly installed at the lower end of the rod (41). A third screw (52) is slidably installed inside the two vertical bars (51). A second internal thread ring (53) is threaded on both ends of the third screw (52).

2. The slope anti-slip device for highways according to claim 1, characterized in that, The four sets of wedge blocks (34) are respectively adapted to the four sets of limiting grooves (15). Each set of wedge blocks (34) has a sliding column (35) fixedly installed on the opposite end. Each set of sliding columns (35) is slidably installed in each set of column grooves (32). A protective net (36) is provided above the second connecting frame (18) and the first connecting frame (16).

3. The slope anti-slip device for highways according to claim 1, characterized in that, The insert (41) is threaded with a first internal threaded ring (44), and a crossbar (45) is slidably installed inside the first groove (42). Limiting strips (46) are symmetrically fixed on both sides of the crossbar (45).

4. The slope anti-slip device for highways according to claim 3, characterized in that, The two sets of limiting strips (46) are respectively slidably embedded in the two sets of second sliding grooves (43), and the upper end of the crossbar (45) is attached to the second screw (47), which is threaded in the insert (41).

5. A slope anti-slip device for highways according to claim 1, characterized in that, A plug (54) is provided between the two vertical bars (51), and a third groove (55) is provided through the plug (54), and the third screw (52) is slidably disposed in the third groove (55).

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