Livestock limp detection and correction supporting device

Abstract

The invention discloses a livestock limp detection and correction supporting device, and belongs to the technical field of livestock breeding, the livestock limp detection and correction supporting device comprises a horizontally arranged detection base, and a mesh fence is arranged on the detection base; a limping detection mechanism and a limping correction supporting mechanism are arranged on the detection base, the limping detection mechanism is in sliding fit with the detection base, the limping detection mechanism comprises four pressure sensing modules and a motion posture monitoring module, and the four pressure sensing modules are arranged on the detection base. The four pressure sensing modules are used for respectively detecting four limbs of livestock, and the motion posture monitoring module is positioned at the end part of the detection base; the limp correction supporting mechanism comprises two front leg correction mechanisms and two rear leg correction mechanisms, and the two front leg correction mechanisms and the two rear leg correction mechanisms are symmetrically arranged on the two sides of the detection base respectively. According to the invention, the affected limb and hoof part of the livestock can be adjusted to a proper angle, so that the fracture part can be better fixed and supported, and bone healing is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of animal husbandry, and in particular relates to a livestock lameness detection and correction support device. Background Art

[0002] In livestock farming, lameness is a common problem that seriously affects the health and production performance of livestock. For example, in dairy farming, lameness may lead to a decrease in the milk production of dairy cows, because lameness makes dairy cows feel pain when standing, thus affecting their normal feeding and rest. According to statistics, the milk production of lame dairy cows may be 10%-20% lower than that of normal dairy cows. In beef cattle farming, lameness will cause slow weight gain of beef cattle, prolong the time to market, and increase breeding costs. At the same time, lameness may also be an external manifestation of livestock suffering from more serious diseases (such as laminitis, fractures, joint diseases, etc.).

[0003] The traditional method of detecting lameness in livestock is mainly manual observation. Farmers use their naked eyes to observe the standing posture of livestock to determine whether they are lame. This method is highly subjective and its accuracy depends on the experience of farmers. For example, it may be difficult for farmers to detect some mildly lame livestock, and manual observation cannot accurately quantify the degree of lameness. In addition, manual observation requires farmers to pay attention to the activities of livestock for a long time. In large-scale farming scenarios, this method is inefficient.

[0004] Therefore, it is necessary to provide a livestock lameness detection and correction support device for use in animal husbandry. Summary of the invention

[0005] The embodiment of the present invention provides a livestock lameness detection and correction support device to solve the problems in the prior art.

[0006] The embodiment of the present invention adopts the following technical scheme: a livestock lameness detection and correction support device, comprising a horizontally arranged detection base, on which a mesh guardrail is provided; a lameness detection mechanism and a lameness correction support mechanism are provided on the detection base, and the lameness detection mechanism and the detection base are slidably matched, the lameness detection mechanism comprises a pressure sensing module and a movement posture monitoring module, four pressure sensing modules are provided, and the four pressure sensing modules respectively detect the four limbs of the livestock, and the movement posture monitoring module is located at the end position of the detection base; the lameness correction support mechanism comprises two front leg correction mechanisms and two hind leg correction mechanisms, and the two front leg correction mechanisms and the two hind leg correction mechanisms are symmetrically arranged on both sides of the detection base.

[0007] Furthermore, each of the pressure sensing modules includes two front detection ends, two rear detection ends and two position adjustment structures, two slide grooves are respectively provided on the detection base, the two position adjustment structures are symmetrically arranged in the two slide grooves of the detection base, the two front detection ends are respectively arranged on the two position adjustment structures, and the two rear detection ends are respectively symmetrically arranged in the detection base.

[0008] Furthermore, each of the position adjustment structures includes an adjustment motor, an adjustment screw and an adjustment block. The adjustment motor is located on the end side wall of the detection base, the adjustment screw is rotatably connected in the slide groove and is transmission connected to the adjustment motor, and the adjustment block is threadedly connected to the adjustment screw and slidably cooperates with the slide groove.

[0009] Furthermore, the front adjustment end includes a front placement seat and a plurality of pressure sensors, the plurality of pressure sensors are distributed on the adjustment block at equal intervals, the front placement seat is located on the plurality of pressure sensors, and a front placement groove is provided on the front placement seat.

[0010] Furthermore, the rear detection end includes a rear placement seat, a mounting seat and several pressure sensors, the mounting seat is arranged in the detection base, several pressure sensors are distributed on the mounting seat at equal intervals, the rear placement seat is located on the several pressure sensors, and the rear placement seat is provided with a rear placement groove.

[0011] Furthermore, the motion posture monitoring module includes a support plate vertically arranged at the end of the detection base and an infrared sensor or a camera arranged on the support plate.

[0012] Furthermore, each front leg correction mechanism is provided with an electric horizontal slide at the bottom, and the electric horizontal slide can drive the position of the front leg correction mechanism to move horizontally. The front leg correction mechanism and the rear leg correction mechanism (42) both include a height correction part and an angle correction part.

[0013] Furthermore, the height correction member includes a support seat, a height adjustment block, a driving motor and two rotating wheels. The support seat is vertically arranged, and the two rotating wheels are connected to the support seat symmetrically and rotated up and down. The driving motor is located on the support seat and is transmission-connected to a rotating wheel. A belt is sleeved between the two rotating wheels. A protective cover is provided on the support seat, and a vertical through groove is provided on the protective cover. The height adjustment block is slidably connected in the vertical through groove and connected to the belt.

[0014] Furthermore, the angle correcting member includes a rotating shaft, a rotating motor, a first gear and a second gear. The height adjustment block is provided with two symmetrically arranged bearing seats. The rotating shaft is rotatably connected to the two bearing seats. The rotating motor is located on the height adjustment block. The first gear is located on the main shaft of the rotating motor. The second gear is located on the rotating shaft and meshes with the first gear. A protective cover is provided on the fixed adjustment block.

[0015] Furthermore, a U-shaped clamp is provided at the end of the rotating shaft, a protective pad is provided on one side of the U-shaped clamp, a clamping plate is provided on the other side of the U-shaped clamp, a protective pad is provided on the clamping plate, a rotatably connected clamping screw is provided on the clamping plate, the clamping screw is threadedly connected to the U-shaped clamp, and two sliding rods that slide with the U-shaped clamp are provided on the clamping plate.

[0016] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0017] First, the present invention makes the livestock stand up during the detection, and these sensors can measure the pressure on various parts of the hoof in real time. The pressure distribution of the hoof of livestock that stand normally is relatively uniform, while the pressure distribution of lame livestock will be significantly deviated due to pain in the affected limb or uneven force. The sensor transmits the pressure data to the built-in microprocessor, and the microprocessor determines whether the livestock is lame and the severity of the lameness by comparing it with the preset normal pressure distribution data model. For example, if the left hind hoof of a sheep is injured and lame, then during its standing process, the pressure value measured by the pressure sensor of the left hind hoof will be significantly lower than that of other normal hooves. The microprocessor can identify the lameness based on this pressure difference and further analyze the degree of lameness. For example, mild lameness may be a pressure deviation between 10% and 20%, moderate lameness between 20% and 30%, and severe lameness exceeds 30%. The lameness of the detected livestock is marked for subsequent correction.

[0018] Secondly, the present invention first places the hoof of the affected limb that needs to be corrected in the U-shaped clamp frame, and rotates the clamping screw on the U-shaped clamp frame, thereby driving the fixing plate to move horizontally on the U-shaped clamp frame through two sliding rods, clamping and fixing the hoof of the affected limb, and the two protection pads can protect the hoof of the affected limb; when the height is adjusted, the driving motor drives the rotating wheel to rotate, which will drive the belt to rotate, and the rotation of the belt will drive the position of the height adjustment block to move up and down in the vertical groove, thereby driving the position of the hoof of the affected limb to be lifted upward; when the angle is adjusted, the rotating motor drives the first gear to rotate, which will drive the second gear to rotate and thereby drive the rotating shaft to rotate on the two bearing seats, and the rotation of the rotating shaft will drive the angle of the U-shaped clamp frame to rotate and adjust to a suitable angle, so that the fracture site can be better fixed and supported, which is beneficial to bone healing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of a first three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of a second three-dimensional structure of the present invention;

[0022] Figure 3 This is a three-dimensional structural exploded diagram of the pressure sensing module in the present invention;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the lameness correction support mechanism of the present invention;

[0024] Figure 5 It is a three-dimensional structural exploded diagram of the lameness correction support mechanism of the present invention;

[0025] Figure 6 for Figure 5 The enlarged view of point A in the middle;

[0026] Figure 7 for Figure 5 The enlarged view of point B in the middle;

[0027] Reference numerals:

[0028] Detection base 1, mesh guardrail 11, slide 12, corrugated plate 13, pressure sensing module 2, front detection end 21, front placement seat 211, front placement slot 212, rear detection end 22, rear placement seat 221, mounting seat 222, rear placement slot 223, position adjustment structure 23, adjustment motor 231, adjustment screw rod 232, adjustment block 233, pressure sensor 24, motion posture monitoring module 3, support plate 31, infrared sensor or camera 32, limp correction support mechanism 4, front Leg correction mechanism 41, rear leg correction mechanism 42, electric horizontal slide 43, height correction piece 44, support seat 441, height adjustment block 442, drive motor 443, rotating wheel 444, belt 445, protective cover 446, vertical through groove 447, angle correction piece 45, rotating shaft 451, rotating motor 452, first gear 453, second gear 454, bearing seat 455, protective cover 456, U-shaped clamp 5, protection pad 51, clamping plate 52, clamping screw 53, sliding rod 54. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] The following describes in detail a technical solution of a livestock lameness detection and correction support device according to various embodiments of the present invention in conjunction with the accompanying drawings.

[0031] Reference Figures 1 to 7 As shown, an embodiment of the present invention provides a livestock lameness detection and correction support device, comprising a horizontally arranged detection base 1, on which a mesh guardrail 11 is provided; a lameness detection mechanism and a lameness correction support mechanism 4 are provided on the detection base 1, and the lameness detection mechanism and the detection base 1 are slidably matched, and the lameness detection mechanism comprises a pressure sensing module 2 and a movement posture monitoring module 3, and four pressure sensing modules 2 are provided, and the four pressure sensing modules 2 respectively detect the limbs of the livestock, and the movement posture monitoring module 3 is located at the end position of the detection base 1; the lameness correction support mechanism 4 comprises two front leg correction mechanisms 41 and two hind leg correction mechanisms 42, and the two front leg correction mechanisms 41 and the two hind leg correction mechanisms 42 are symmetrically arranged on both sides of the detection base 1.

[0032] Specifically, each of the pressure sensing modules 2 includes two front detection ends 21, two rear detection ends 22 and two position adjustment structures 23. Two slide grooves 12 are respectively provided on the detection base 1. The two position adjustment structures 23 are symmetrically arranged in the two slide grooves 12 of the detection base 1. The two front detection ends 21 are respectively arranged on the two position adjustment structures 23, and the two rear detection ends 22 are respectively symmetrically arranged in the detection base 1.

[0033] Specifically, each of the position adjustment structures 23 includes an adjustment motor 231, an adjustment screw 232 and an adjustment block 233. The adjustment motor 231 is located on the end side wall of the detection base 1, the adjustment screw 232 is rotatably connected in the slide groove 12 and is transmission-connected to the adjustment motor 231, and the adjustment block 233 is threadedly connected to the adjustment screw 232 and slidably cooperates with the slide groove 12.

[0034] It should be noted that both ends of the adjustment block 233 are provided with corrugated plates 13 connected to the slide 12. During the movement of the adjustment block 233, the corrugated plates 13 can be extended and retracted to prevent the limbs of livestock from falling into the slide 12 and causing injuries.

[0035] During use, the positions of the two front seats 211 can be adjusted according to the different body sizes of the livestock. For example, adjustments can be made to livestock of different sizes such as pigs, sheep, horses, and cows. At this time, the two adjustment motors 231 work simultaneously and respectively drive the two adjustment screw rods 232 to rotate, thereby driving the positions of the two adjustment blocks 233 to move horizontally in the two slide grooves 12, so as to adjust the position when detecting livestock lameness.

[0036] Specifically, the front adjustment end includes a front placement seat 211 and a plurality of pressure sensors 24, and the plurality of pressure sensors 24 are evenly spaced on the adjustment block 233, and the front placement seat 211 is located on the plurality of pressure sensors 24, and a front placement groove 212 is provided on the front placement seat 211; the rear detection end 22 includes a rear placement seat 221, a mounting seat 222 and a plurality of pressure sensors 24, and the mounting seat 222 is arranged in the detection base 1, and the plurality of pressure sensors 24 are evenly spaced on the mounting seat 222, and the rear placement seat 221 is located on the plurality of pressure sensors 24, and a rear placement groove 223 is provided on the rear placement seat 221.

[0037] During use, the two front legs of the livestock are placed in the two front placement slots 212 on the two front placement seats 211, and the two hind legs are placed in the two rear placement slots 223 on the two rear placement seats 221. At this time, the livestock needs to be pulled by professional animal husbandry personnel so that the livestock can stand for detection;

[0038] When testing, the livestock is made to stand, and these sensors can measure the pressure on various parts of the hoof in real time. The pressure distribution of the hoof of livestock that are standing normally is relatively uniform, while the pressure distribution of lame livestock will be significantly deviated due to pain in the affected limb or uneven force. The sensor transmits the pressure data to the built-in microprocessor, which determines whether the livestock is lame and the severity of the lameness by comparing it with the preset normal pressure distribution data model. For example, if the left hind hoof of a sheep is injured and lame, then during its standing process, the pressure value measured by the pressure sensor 24 of the left hind hoof will be significantly lower than that of other normal hooves. The microprocessor can identify the lameness based on this pressure difference and specifically analyze the degree of lameness. For example, mild lameness may be a pressure deviation between 10%-20%, moderate lameness between 20%-30%, and severe lameness exceeding 30%.

[0039] The pressure sensor 24 is an XPCM10 series metal strain gauge pressure sensor 24 .

[0040] Specifically, the motion posture monitoring module 3 includes a support plate 31 vertically arranged at the end of the detection base 1 and an infrared sensor or a camera 32 arranged on the support plate 31 .

[0041] Infrared sensors can detect the movement trajectory and joint angle changes of livestock's affected limbs and hooves by emitting infrared rays and receiving reflected light; cameras can take videos of livestock standing or running, and then extract the movement characteristics of livestock's affected limbs and hooves through image analysis technology; for example, the swing amplitude and frequency of a horse standing normally are relatively stable, while for a lame horse, the swing amplitude of the affected limb will decrease, the frequency may also slow down, and the flexion and extension angle of the joint will also be abnormal. These monitoring data are also transmitted to the microprocessor and compared with the normal movement posture data to assist in judging the lameness and improve the accuracy of detection.

[0042] Specifically, an electric horizontal slide 43 is provided at the bottom of each front leg correction mechanism 41, and the electric horizontal slide 43 can drive the position of the front leg correction mechanism 41 to move horizontally. The front leg correction mechanism 41 and the hind leg correction mechanism 42 both include a height correction part 44 and an angle correction part 45.

[0043] The two electric horizontal slides 43 respectively drive the positions of the two front leg correction mechanisms 41 to move. When correcting livestock, the positions of the two front legs can be adjusted according to the different body shapes of the livestock, so as to be suitable for the correction work of different types of livestock.

[0044] Specifically, the height corrector 44 includes a support seat 441, a height adjustment block 442, a drive motor 443 and two rotating wheels 444, the support seat 441 is vertically arranged, the two rotating wheels 444 are symmetrically rotated up and down and connected to the support seat 441, the drive motor 443 is located on the support seat 441 and is transmission-connected to one rotating wheel 444, a belt 445 is sleeved between the two rotating wheels 444, a protective cover 446 is provided on the support seat 441, a vertical through slot 447 is provided on the protective cover 446, and the height adjustment block 442 is slidably connected in the vertical through slot 447 and connected to the belt 445;

[0045] The angle correcting member 45 includes a rotating shaft 451, a rotating motor 452, a first gear 453 and a second gear 454. The height adjustment block 442 is provided with two symmetrically arranged bearing seats 455. The rotating shaft 451 is rotatably connected to the two bearing seats 455. The rotating motor 452 is located on the height adjustment block 442. The first gear 453 is located on the main shaft of the rotating motor 452. The second gear 454 is located on the rotating shaft 451 and meshes with the first gear 453. A protective cover 456 is provided on the fixed adjustment block 233.

[0046] A U-shaped clamp 5 is provided at the end of the rotating shaft 451, a protective pad 51 is provided on one side of the inside of the U-shaped clamp 5, a clamping plate 52 is provided on the other side of the U-shaped clamp 5, the protective pad 51 is provided on the clamping plate 52, a rotatably connected clamping screw 53 is provided on the clamping plate 52, the clamping screw 53 is threadedly connected to the U-shaped clamp 5, and two sliding rods 54 that slide with the U-shaped clamp 5 are provided on the clamping plate 52.

[0047] First, place the hoof of the affected limb that needs to be corrected in the U-shaped clamp frame 5, and rotate the clamping screw 53 on the U-shaped clamp frame 5, thereby driving the fixing plate to move horizontally on the U-shaped clamp frame 5 through two sliding rods 54, and clamp and fix the hoof of the affected limb. The two protection pads 51 can protect the hoof of the affected limb;

[0048] For livestock with mild lameness, the height correction member 44 can provide appropriate elevation and support to reduce the burden on the affected limb. For example, for pigs with mild lameness, the support member can raise the hoof of the affected limb by 1-2 cm, so that the affected limb is in a relatively relaxed state and promotes recovery;

[0049] When the height is adjusted, the driving motor 443 drives the rotating wheel 444 to rotate, which in turn drives the belt 445 to rotate. The rotation of the belt 445 drives the height adjustment block 442 to move up and down in the vertical through groove 447, thereby driving the position of the hoof of the affected limb to be lifted upward.

[0050] For livestock with moderate and severe lameness, the height correction member 44 can be adjusted to a greater extent as needed, not only to raise the affected limb, but also to adjust the support angle to adapt to different lameness conditions and livestock body types. For example, for cattle with severe lameness due to leg fractures, the support structure can raise the affected limb by 5-10 cm and adjust it to a suitable angle, so that the fracture site can be better fixed and supported, which is conducive to bone healing.

[0051] When adjusting the angle, the rotating motor 452 drives the first gear 453 to rotate, which will drive the second gear 454 to rotate, thereby driving the rotating shaft 451 to rotate on the two bearing seats 455. The rotation of the rotating shaft 451 will drive the angle of the U-shaped clamp 5 to rotate and adjust to a suitable angle, so that the fracture site can be better fixed and supported, which is beneficial to bone healing.

[0052] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A livestock lameness detection and correction support device, characterized in that: The invention comprises a detection base (1) arranged horizontally, wherein a mesh fence (11) is arranged on the detection base (1); a lameness detection mechanism and a lameness correction support mechanism (4) are arranged on the detection base (1), wherein the lameness detection mechanism and the detection base (1) are slidably matched, wherein the lameness detection mechanism comprises a pressure sensing module (2) and a movement posture monitoring module (3), wherein four pressure sensing modules (2) are provided, and the four pressure sensing modules (2) respectively detect the four limbs of the livestock, and the movement posture monitoring module (3) is located at the end of the detection base (1); and the lameness correction support mechanism (4) comprises two front leg correction mechanisms (41) and two hind leg correction mechanisms (42), wherein the two front leg correction mechanisms (41) and the two hind leg correction mechanisms (42) are symmetrically arranged on both sides of the detection base (1).

2. A livestock lameness detection and correction support device according to claim 1, characterized in that: Each of the pressure sensing modules (2) comprises two front detection ends (21), two rear detection ends (22) and two position adjustment structures (23); the detection base (1) is provided with two slide grooves (12), the two position adjustment structures (23) are symmetrically arranged in the two slide grooves (12) of the detection base (1); the two front detection ends (21) are respectively arranged on the two position adjustment structures (23), and the two rear detection ends (22) are respectively symmetrically arranged in the detection base (1).

3. A livestock lameness detection and correction support device according to claim 2, characterized in that: Each of the position adjustment structures (23) comprises an adjustment motor (231), an adjustment screw (232) and an adjustment block (233); the adjustment motor (231) is located on the end side wall of the detection base (1); the adjustment screw (232) is rotatably connected in the slide groove (12) and is transmission-connected to the adjustment motor (231); and the adjustment block (233) is threadedly connected to the adjustment screw (232) and is slidably matched with the slide groove (12).

4. A livestock lameness detection and correction support device according to claim 3, characterized in that: The front adjustment end comprises a front placement seat (211) and a plurality of pressure sensors (24), wherein the plurality of pressure sensors (24) are distributed on the adjustment block (233) at equal intervals, the front placement seat (211) is located on the plurality of pressure sensors (24), and a front placement groove (212) is provided on the front placement seat (211).

5. The livestock lameness detection and correction support device according to claim 3, characterized in that: The rear detection end (22) comprises a rear placement seat (221), a mounting seat (222) and a plurality of pressure sensors (24); the mounting seat (222) is arranged in the detection base (1); the plurality of pressure sensors (24) are distributed on the mounting seat (222) at equal intervals; the rear placement seat (221) is located on the plurality of pressure sensors (24); and a rear placement groove (223) is provided on the rear placement seat (221).

6. The livestock lameness detection and correction support device according to claim 1, characterized in that: The motion posture monitoring module (3) comprises a support plate (31) vertically arranged at the end of the detection base (1) and an infrared sensor or a camera (32) arranged on the support plate (31).

7. The livestock lameness detection and correction support device according to claim 1, characterized in that: An electric horizontal slide (43) is provided at the bottom of each front leg correction mechanism (41), and the electric horizontal slide (43) can drive the position of the front leg correction mechanism (41) to move horizontally. The front leg correction mechanism (41) and the rear leg correction mechanism (42) both include a height correction member (44) and an angle correction member (45).

8. The livestock lameness detection and correction support device according to claim 7, characterized in that: The height correction member (44) comprises a support seat (441), a height adjustment block (442), a driving motor (443) and two rotating wheels (444); the support seat (441) is vertically arranged; the two rotating wheels (444) are symmetrically rotated and connected to the support seat (441); the driving motor (443) is located on the support seat (441) and is transmission-connected to one rotating wheel (444); a belt (445) is sleeved between the two rotating wheels (444); a protective cover (446) is provided on the support seat (441); a vertical through groove (447) is provided on the protective cover (446); the height adjustment block (442) is slidably connected in the vertical through groove (447) and is connected to the belt (445).

9. A livestock lameness detection and correction support device according to claim 8, characterized in that: The angle correcting member (45) comprises a rotating shaft (451), a rotating motor (452), a first gear (453) and a second gear (454); the height adjustment block (442) is provided with two symmetrically arranged bearing seats (455); the rotating shaft (451) is rotatably connected to the two bearing seats (455); the rotating motor (452) is located on the height adjustment block (442); the first gear (453) is located on the main shaft of the rotating motor (452); the second gear (454) is located on the rotating shaft (451) and meshes with the first gear (453); and the fixed adjustment block (233) is provided with a protective cover (456).

10. The livestock lameness detection and correction support device according to claim 9, characterized in that: A U-shaped clamp (5) is provided at the end of the rotating shaft (451), a protective pad (51) is provided on one side of the interior of the U-shaped clamp (5), a clamping plate (52) is provided on the other side of the U-shaped clamp (5), a protective pad (51) is provided on the clamping plate (52), a rotatably connected clamping screw (53) is provided on the clamping plate (52), the clamping screw (53) is threadedly connected to the U-shaped clamp (5), and two sliding rods (54) that slidably cooperate with the U-shaped clamp (5) are provided on the clamping plate (52).

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