Multi-station synchronous anchorage device detection device

Abstract

The utility model discloses a multi-station synchronous anchorage device detection device, which comprises an automatic centering conveyor belt and a blanking conveyor belt, a plurality of centering pieces are linearly arranged on the automatic centering conveyor belt at intervals, and a rotary transportation clamp is arranged between the automatic centering conveyor belt and the blanking conveyor belt. The rotary conveying clamp comprises a plurality of rotary clamping parts arranged corresponding to the centering positions of the centering pieces. Visual detection devices are linearly arranged at the positions, corresponding to the multiple rotary clamping parts, of one side of the discharging conveying belt. According to the utility model, a plurality of anchorage devices can be efficiently transferred and rotated at one time, the outer circular surfaces of the anchorage devices are detected on the premise of ensuring the relative position precision, and the detection efficiency of the outer circular surfaces of the anchorage devices is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of anchorage testing, specifically relating to a multi-station synchronous anchorage testing device. Background Technology

[0002] After machining the outer surface of the anchor, it needs to be scanned and inspected to determine if there are defects such as burrs or cracks. In existing technologies, a single anchor is typically held and placed at an inspection station using a robotic arm, and then an inspection camera or other device positioned at the station photographs and inspects the anchor's exterior. Since the robotic arm can only hold one anchor at a time for external inspection, the efficiency of anchor exterior surface inspection is low. Furthermore, existing conveyor belts and robotic arms cannot guarantee the positional accuracy of the anchor during movement and transport, causing a misalignment between the anchor's center and the center of the clamp. This results in image distortion during the final visual inspection of the anchor's outer surface, thus affecting the accuracy of the inspection.

[0003] In view of the above-mentioned problems existing in the prior art, this utility model discloses a multi-station synchronous anchor detection device. Utility Model Content

[0004] This utility model discloses a multi-station synchronous anchor inspection device, which can efficiently transfer and rotate several anchors at one time, and inspect the outer circular surface of the anchors while ensuring the accuracy of relative position, thus effectively improving the inspection efficiency of the outer circular surface of the anchors.

[0005] This utility model is achieved through the following technical solution:

[0006] A multi-station synchronous anchor inspection device includes an automatic centering conveyor belt and a feeding conveyor belt. The automatic centering conveyor belt has a plurality of centering components arranged linearly at intervals. A rotary transport clamp is provided between the automatic centering conveyor belt and the feeding conveyor belt. The rotary transport clamp includes a plurality of rotary clamping parts arranged at the centering positions corresponding to the centering positions of the centering components. A vision inspection device is arranged linearly on one side of the feeding conveyor belt corresponding to the positions of the plurality of rotary clamping parts.

[0007] Several anchors to be inspected are sequentially placed at centering points on an automatic centering conveyor belt. As the conveyor belt moves the anchors, the centering points compress the outer surface of the anchors, forcing them to the predetermined centering position. A rotating transport clamp then picks up and holds the centered anchor and moves it to an inspection station above the unloading conveyor belt (not yet on the unloading conveyor belt). The rotating transport clamp rotates the anchor circumferentially, while a visual inspection device on one side of the inspection station captures images of the anchor's outer surface. These images are sent to an external computer, where a built-in image recognition program identifies defects such as unevenness, burrs, and cracks on the outer surface. If no defects are found, the rotating transport clamp lowers the anchor onto the unloading conveyor belt, which then moves the inspected anchors to the next inspection station.

[0008] To better realize this utility model, the rotating transport fixture further includes a translation and lifting device, a mounting truss, a rotating frame, a rotating device, and an anchor pickup part. The moving end of the translation and lifting device is provided with a mounting truss. The bottom of the mounting truss is rotatably provided with a rotating frame corresponding to the positions of several centering components. The interior of the mounting truss is provided with a rotating device that drives several rotating frames to rotate synchronously. The bottom of the rotating frame is provided with an anchor pickup part.

[0009] To better realize this utility model, the anchor picking part further includes a telescopic device and a picking clamp. The telescopic device is installed at the bottom of the rotating frame, and the telescopic end of the telescopic device is set downward and connected to the picking clamp.

[0010] To better realize this utility model, the rotating device further includes a drive gear, a drive chain, a drive motor, and a driven gear. The driven gear is connected to the top of the rotating shaft or the turntable. The drive chain is driven and wound between the drive gear and the driven gear. The drive gear is driven and connected to the output shaft of the drive motor.

[0011] To better realize this utility model, the rotating device further includes a tension sprocket, the bottom of which is provided with a sliding seat, which is slidably connected to the mounting truss, and the sliding seat is provided with at least one set of locking elements for locking the sliding seat.

[0012] To better realize this utility model, the visual inspection device further includes a mounting track, a mounting plate, and a CCD camera. The mounting plate is slidably disposed on the mounting track, and a CCD camera is disposed on the mounting plate corresponding to the clamping end of the rotating transport fixture.

[0013] To better realize this utility model, the automatic centering conveyor belt further includes a feeding conveyor belt, V-shaped centering clips, a distance detection device, and a swing clamping component. The feeding conveyor belt has a plurality of V-shaped centering clips arranged linearly along its center plane, and the center plane of the V-shaped centering clips is coplanar with the center plane of the feeding conveyor belt. Distance detection devices are respectively provided on both sides of the feeding conveyor belt corresponding to the centering position of the V-shaped centering clips. At least one set of swing clamping components is provided on the feeding conveyor belt corresponding to the opening position of the V-shaped centering clips.

[0014] To better realize this utility model, the swing clamping component further includes a gantry bracket, a swing rod, and a mounting rod. The gantry bracket spans the top of the feeding conveyor belt. One end of the swing rod is rotatably hinged to one end of the mounting rod. The other end of the swing rod is set to correspond to the opening of the V-shaped centering clip. The other end of the mounting rod is connected to the middle position of the gantry bracket.

[0015] To better realize this utility model, the translation and lifting device further includes a translation device and a lifting device. The translation end of the translation device is provided with a lifting device, and the lifting end of the lifting device is provided with a mounting truss.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] This invention involves linearly arranging and rotating several rotating frames at the bottom of an installation truss. A telescopic device at the bottom of the rotating frames, along with a picking clamp, synchronously grips and picks up several anchors. Simultaneously, a rotating device drives the rotating frames to rotate circumferentially, thereby causing the anchors to rotate circumferentially as well. Combined with the rapid translation of a translation device and the rapid lifting of a lifting device, this allows for efficient and rapid movement of several anchors between the picking and inspection stations in a single operation, and synchronous rotation of the anchors at the inspection station, achieving efficient outer surface inspection of the anchors. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of a multi-station synchronous anchorage testing device;

[0019] Figure 2 This is a top view of a multi-station synchronous anchorage testing device;

[0020] Figure 3 A three-dimensional structural diagram of a rotating transport fixture;

[0021] Figure 4 Left view of the rotating transport fixture;

[0022] Figure 5 This is a three-dimensional structural diagram of the rotating device;

[0023] Figure 6 This is a top view of the rotating device;

[0024] Figure 7 This is a three-dimensional structural diagram of an automatic centering conveyor belt.

[0025] Figure 8 A top view of an automatic centering conveyor belt;

[0026] Figure 9 Left view of the automatic centering conveyor belt;

[0027] Figure 10 This is a schematic diagram showing the contact between the rocker arm and the outer circular surface of the anchor.

[0028] Figure 11 This is a schematic diagram of the deflection of the pendulum rod;

[0029] Figure 12 This is a schematic diagram of the CCD camera installation.

[0030] Among them: 1-Automatic centering conveyor belt; 2-Unloading conveyor belt; 3-Rotating transport fixture; 4-Vision inspection device; 11-V-shaped centering clip; 12-Distance detection device; 13-Swing clamping component; 31-Mounting truss; 32-Rotating frame; 33-Rotating device; 34-Telescopic device; 35-Pickup fixture; 41-CCD camera; 131-Gantry bracket; 132-Swing rod; 133-Mounting rod; 331-Drive gear; 332-Drive chain; 333-Drive motor; 334-Driven gear; 335-Tensioning connecting wheel; 336-Sliding seat. Detailed Implementation

[0031] Example 1:

[0032] This embodiment provides a multi-station synchronous anchorage detection device, such as... Figure 1 and Figure 2 As shown, it includes an automatic centering conveyor belt 1 and a feeding conveyor belt 2. Several centering components are arranged linearly at intervals on the automatic centering conveyor belt 1. A rotary transport clamp 3 is arranged between the automatic centering conveyor belt 1 and the feeding conveyor belt 2. The rotary transport clamp 3 includes several rotary clamping parts arranged at the centering positions corresponding to the centering positions of the centering components. A vision inspection device 4 is arranged linearly on one side of the feeding conveyor belt 2 corresponding to the positions of the several rotary clamping parts.

[0033] A rotary transport fixture 3 is positioned between the automatic centering conveyor belt 1 and the unloading conveyor belt 2. The rotary transport fixture 3 can pick up the anchors located on the automatic centering conveyor belt 1 and move them to the inspection station located above the unloading conveyor belt 2. Furthermore, when the anchors are at the inspection station, the rotary transport fixture 3 can also drive the anchors to rotate circumferentially. The specific inspection process is as follows:

[0034] Several anchors are sequentially placed at several centering points on the automatic centering conveyor belt 1. As the centering points move, they exert pressure on the outer surface of the anchors, forcing them to move to a preset centering position. When the rotary transport clamp 3 picks up the anchor at the centering position, the center of the rotary transport clamp 3 is coaxial with the center of the anchor. The rotary transport clamp 3 then picks up the anchor and moves it to the inspection station located above the unloading conveyor belt 2, so that the outer surface of the anchor corresponds to the inspection end of the vision inspection device 4. The rotary transport clamp 3 then drives the anchor to rotate circumferentially, and the vision inspection device 4 takes a picture of the outer surface of the anchor. The image is used to identify whether there are defects such as burrs, unevenness, or cracks on the outer surface of the anchor. If the outer surface of the anchor is found to be free of defects, the rotary transport clamp 3 places the qualified anchor on the unloading conveyor belt 2, which then transports the anchor to the next station.

[0035] By setting up the rotating transport clamp 3, the centering position of the anchor can be guaranteed during the picking and testing process, and the anchor can be rotated during the testing process to capture an image of the outer circular surface of the anchor.

[0036] Example 2:

[0037] This embodiment is a further optimization based on Embodiment 1, such as... Figure 3 and Figure 4 As shown, the rotating transport fixture 3 includes a translation and lifting device, a mounting truss 31, a rotating frame 32, a rotating device 33, and an anchor pickup part. The moving end of the translation and lifting device is provided with the mounting truss 31. The bottom of the mounting truss 31 is rotatably provided with the rotating frame 32 corresponding to the positions of several centering components. The interior of the mounting truss 31 is provided with a rotating device 33 that drives several rotating frames 32 to rotate synchronously. The bottom of the rotating frame 32 is provided with an anchor pickup part.

[0038] The translational lifting device can translate horizontally and lift vertically, enabling the installation truss 31 to move rapidly between the automatic centering conveyor belt 1 and the unloading conveyor belt 2. At the picking station, several anchors are picked up simultaneously by the anchor picking unit. Then, with the assistance of the translational lifting device, these anchors are quickly transferred to the inspection station. The rotating device 33 drives the rotating frame 32 to rotate, causing the anchors to rotate relative to the vision inspection device 4. The vision inspection device 4 then images the outer surface of the anchors, ultimately achieving simultaneous inspection of several anchors and effectively improving the inspection efficiency of the anchor outer surface.

[0039] It should also be noted that, compared to the traditional inspection method where a robotic arm places the anchor on a turntable, the turntable rotates the anchor, and a camera on one side of the turntable photographs the outer surface of the anchor, the traditional method has the following drawbacks:

[0040] In a traditional system, the distance between the center of the turntable and the lens of the detection camera is fixed. However, if the robotic arm places the anchor on the turntable in an eccentric position, the distance between the outer surface of the anchor and the lens of the detection camera will change as the turntable rotates. This results in distortion of the final captured image, affecting the accuracy of image recognition in determining whether there are defects on the outer surface of the anchor. The technical solution in this embodiment pre-positions the anchor using an automatic centering conveyor belt 1. This ensures that after the anchor pickup unit clamps the anchor, its center coincides with the center of the anchor. Consequently, as the anchor pickup unit rotates with the rotating frame 32, the distance between the outer surface of the anchor and the visual inspection device 4 does not change significantly, ultimately ensuring the accuracy of the detection results.

[0041] Furthermore, the translation and lifting device includes a translation device and a lifting device. The translation end of the translation device is provided with a lifting device, and the lifting end of the lifting device is provided with a mounting truss 31.

[0042] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0043] Example 3:

[0044] This embodiment is a further optimization based on the above embodiment 1 or 2, such as... Figure 3 As shown, the anchor pickup unit includes a telescopic device 34 and a pickup clamp 35. The telescopic device 34 is installed at the bottom of the rotating frame 32, and the telescopic end of the telescopic device 34 is set downward and connected to the pickup clamp 35.

[0045] The telescopic device 34 includes any one of a telescopic cylinder, a telescopic hydraulic cylinder, or a telescopic rod. The telescopic device 34 can perform lifting and lowering with an error of less than or equal to 0.5 mm, so as to drive the picking clamp 35 to accurately clamp and position the anchor in the vertical direction, ensuring the relative positional accuracy between the outer surface of the anchor and the visual inspection device 4.

[0046] Furthermore, the picking fixture 35 includes any one of pneumatic grippers, electric grippers, magnetic chucks, and pneumatic chucks.

[0047] The other parts of this embodiment are the same as those in Embodiment 1 or 2 above, so they will not be described again.

[0048] Example 4:

[0049] This embodiment is a further optimization based on any one of embodiments 1-3 above, such as... Figure 5 and Figure 6As shown, the rotating device 33 includes a drive gear 331, a drive chain 332, a drive motor 333, and a driven gear 334. The driven gear 334 is connected to the top of the rotating shaft or turntable. The drive chain 332 is wound between the drive gear 331 and the driven gear 334. The drive gear 331 is connected to the output shaft of the drive motor 333. The rotating device 33 also includes a tension sprocket 335. A sliding seat 336 is provided at the bottom of the tension sprocket 335. The sliding seat 336 is slidably connected to the mounting truss 31. At least one set of locking elements is provided on the sliding seat 336 to lock the sliding seat 336.

[0050] The drive motor 333 drives the drive gear 331 to rotate, so that the drive chain 332 drives several driven gears 334 to rotate synchronously, thereby ensuring that several rotating frames 32 at the bottom of the mounting truss 31 can rotate synchronously, so as to realize the rotation detection of the outer circular surface of several anchors at one time.

[0051] Furthermore, the rotating device 33 also includes a tension sprocket 335, which engages with the drive chain 332. The drive chain 332 is tensioned by the tension sprocket 335 to ensure that the drive chain 332 is in a taut state and to prevent the drive chain 332 from slipping or loosening.

[0052] Furthermore, a sliding seat 336 is provided at the bottom of the tensioning sprocket 335. The sliding seat 336 is slidably connected to the mounting truss 31, and at least one set of locking elements is provided on the sliding seat 336 to lock it. Specifically, a waist-shaped groove is provided on the sliding seat 336, and a connecting hole is provided on the base plate of the mounting truss 31. A connecting bolt is inserted into the connecting hole, and the top of the connecting bolt passes upward through the waist-shaped groove and is fitted with a nut. When the nut is loosened, the connecting bolt can slide along the waist-shaped groove, thereby adjusting the installation position of the sliding seat 336 at the bottom of the mounting truss 31, that is, adjusting the tension gap between the tensioning sprocket 335 and the drive chain 332. When the nut is tightened, the connecting bolt is pressed by the nut, thereby fixing the sliding seat 336.

[0053] The other parts of this embodiment are the same as any one of the embodiments 1-3 above, so they will not be described again.

[0054] Example 5:

[0055] This embodiment is a further optimization based on any one of embodiments 1-4 above, such as... Figure 12 As shown, the visual inspection device 4 includes a mounting track, a mounting plate, and a CCD camera 41. The mounting plate is slidably mounted on the mounting track, and the CCD camera 41 is provided on the mounting plate at the clamping end corresponding to the rotating transport fixture 3.

[0056] The mounting plate can slide along the vertically arranged mounting tracks to adjust the position of the CCD camera 41 on the mounting plate relative to the outer surface of the anchor. After the mounting plate slides into place, tightening screws can be screwed into the threaded holes on the mounting tracks to press the sides of the mounting plate together, thus fixing the mounting plate in place. A mounting hole is provided at the center of the mounting plate corresponding to the outer surface of the anchor, and the lens of the CCD camera 41 is installed in the mounting hole.

[0057] The other parts of this embodiment are the same as any one of the embodiments 1-4 above, so they will not be described again.

[0058] Example 6:

[0059] This embodiment is a further optimization based on any one of embodiments 1-4 above, such as... Figures 7-9 As shown, the automatic centering conveyor belt 1 includes a feeding conveyor belt, V-shaped centering clips 11, distance detection devices 12, and swing clamping components 13. The feeding conveyor belt has a plurality of V-shaped centering clips 11 arranged linearly along its center plane, and the center plane of the V-shaped centering clips 11 is coplanar with the center plane of the feeding conveyor belt. Distance detection devices 12 are respectively provided on both sides of the feeding conveyor belt corresponding to the centering position of the V-shaped centering clips 11. At least one set of swing clamping components 13 is provided on the feeding conveyor belt corresponding to the opening position of the V-shaped centering clips 11.

[0060] The V-shaped centering clip 11 is connected to the connecting hole on the panel of the feeding conveyor belt via connecting screws, so that the feeding conveyor belt can drive the V-shaped centering clip 11 to move linearly. The center plane of the V-shaped centering clip 11 is coplanar with the center plane of the feeding conveyor belt. This ensures that after the outer circle of the anchor is squeezed and centered by the V-shaped centering clip 11, the center of the anchor is located on the center plane between the V-shaped centering clip 11 and the feeding conveyor belt, so as to accurately position the anchor in the future.

[0061] like Figure 10 and Figure 11 As shown, during the anchor conveying process, when the anchor passes the swing clamping member 13, the swing clamping member 13 presses the anchor towards the opening of the V-shaped centering clip 11, causing the outer surface of the anchor to be pressed tightly against the side of the opening of the V-shaped centering clip 11. This generates a certain external force, compelling the anchor to move its center to the midpoint of the V-shaped centering clip 11 under the action of the side of the opening. Furthermore, to prevent the anchor from shifting its center during the conveying process with the feeding conveyor belt, each time the anchor passes a set of distance detection devices 12 symmetrically arranged on both sides of the feeding conveyor belt, the distance between the outer surface of the anchor and the sides of the feeding conveyor belt is detected in real time by the distance detection devices 12. The distance on both sides is used to determine whether the center of the anchor is located on the midpoint of the V-shaped centering clip 11.

[0062] Furthermore, such as Figure 10 and Figure 11 As shown, the swing clamping component 13 includes a gantry bracket 131, a swing rod 132, and a mounting rod 133. The gantry bracket 131 spans the top of the feeding conveyor belt. One end of the swing rod 132 is rotatably hinged to one end of the mounting rod 133. The other end of the swing rod 132 is set corresponding to the opening of the V-shaped centering clip 11. The other end of the mounting rod 133 is connected to the middle position of the gantry bracket 131.

[0063] A gantry bracket 131 is mounted across the top of the feeding conveyor belt by fastening bolts. A swing arm 132 is rotatably hinged at the midpoint of the gantry bracket 131. Under normal conditions, the swing arm 132 is in a plumb state under its own weight, so that one end of the swing arm 132 corresponds to the opening of the V-shaped centering clip 11. When the V-shaped centering clip 11 drives the anchor to pass through the swing arm 132, the outer surface of the anchor contacts one side of the swing arm 132. The swing arm 132 pushes the anchor toward the inside of the V-shaped centering clip 11, ensuring that the outer surface of the anchor is in close contact with the side of the opening of the V-shaped centering clip 11, thereby ensuring the centering effect of the anchor. When the anchor passes the bottom of the portal frame 131, the swing rod 132 swings under the squeezing action of the anchor so that the anchor passes the bottom of the portal frame 131 until the anchor completely passes the bottom of the portal frame 131. At this time, the swing rod 132 loses the squeezing action of the anchor and returns to the plumb position under its own gravity so as to contact the outer surface of the next anchor.

[0064] The other parts of this embodiment are the same as any one of the embodiments 1-5 above, so they will not be described again.

[0065] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A multi-station synchronous anchor detection device, comprising an automatic centering conveyor belt (1), a blanking conveyor belt (2), characterized in that, The automatic centering conveyor (1) is provided with a plurality of centering members arranged linearly and at intervals, a rotary transport clamp (3) is arranged between the automatic centering conveyor (1) and the discharging conveyor (2), the rotary transport clamp (3) comprises a plurality of rotary clamping portions arranged at the centering positions corresponding to the centering members, and a visual detection device (4) is arranged linearly at the positions corresponding to the plurality of rotary clamping portions on one side of the discharging conveyor (2).

2. The multi-station synchronous anchorage detection device according to claim 1, characterized in that, The rotary transport clamp (3) comprises a translation lifting device, a mounting truss (31), a rotary frame (32), a rotating device (33) and an anchor picking portion, the mounting truss (31) is arranged on the moving end of the translation lifting device, the rotary frame (32) is rotatably arranged at the positions corresponding to the plurality of centering members at the bottom of the mounting truss (31), the rotating device (33) is arranged in the mounting truss (31) and drives the plurality of rotary frames (32) to rotate synchronously, and the anchor picking portion is arranged at the bottom of the rotary frame (32).

3. The multi-station synchronous anchorage detection device according to claim 2, characterized in that, The anchor picking portion comprises a telescopic device (34) and a picking clamp (35), the telescopic device (34) is mounted at the bottom of the rotary frame (32), and the telescopic end of the telescopic device (34) is downwardly arranged and connected with the picking clamp (35).

4. The multi-station simultaneous anchor detection device of claim 3, wherein, The rotating device (33) comprises a driving gear (331), a driving chain (332), a driving motor (333) and a driven gear (334), the driven gear (334) is connected with the top of a rotating shaft or a rotating disc, the driving chain (332) is transmissionally arranged between the driving gear (331) and the driven gear (334), and the driving gear (331) is transmissionally connected with the output shaft of the driving motor (333).

5. The multi-station simultaneous anchor detection device of claim 4, wherein, The rotating device (33) further comprises a tensioning sprocket (335), the bottom of the tensioning sprocket (335) is provided with a sliding seat (336), the sliding seat (336) is slidingly and matchingly connected with the mounting truss (31), and at least one set of locking members for locking the sliding seat (336) is arranged on the sliding seat (336).

6. A multi-station simultaneous anchorage detection device according to any one of claims 1-5, characterized in that, The visual detection device (4) comprises a mounting rail, a mounting plate and a CCD camera (41), the mounting plate is slidingly arranged on the mounting rail, and the CCD camera (41) is arranged on the mounting plate at the clamping end of the rotary transport clamp (3).

7. A multi-station simultaneous anchorage detection device according to any one of claims 1-5, characterized in that, The automatic centering conveyor (1) comprises a feeding conveyor, V-shaped centering cards (11), distance detection devices (12) and swing pressing members (13), the feeding conveyor is provided with a plurality of V-shaped centering cards (11) arranged linearly along a center split surface, the center split surface of the V-shaped centering card (11) is coplanarly arranged with the center split surface of the feeding conveyor, the distance detection devices (12) are arranged at the centering positions of the V-shaped centering cards (11) on both sides of the feeding conveyor, and at least one set of swing pressing members (13) is arranged on the feeding conveyor at the opening positions of the V-shaped centering cards (11).

8. The multi-station simultaneous anchor detection device of claim 7, wherein, The swing pressing part (13) comprises a portal frame (131), a swing lever (132) and a mounting rod (133), the portal frame (131) is arranged on the top of the feeding conveying belt, one end of the swing lever (132) is rotationally connected with one end of the mounting rod (133), the other end of the swing lever (132) is arranged corresponding to the opening of the V-shaped centering clamp (11), and the other end of the mounting rod (133) is connected with the middle position of the portal frame (131).

9. A multi-station simultaneous anchorage detection device according to any one of claims 2-5, characterized in that, The translation lifting device comprises a translation device and a lifting device, a lifting device is arranged on the translation end of the translation device, and a mounting truss (31) is arranged on the lifting end of the lifting device.

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