A plate barging bracket for shipbuilding and its use method

Abstract

The present invention discloses a plate barging bracket for shipbuilding, comprising longitudinal girders and transverse girders that are cross-fixed and connected, and support legs are fixedly connected below the longitudinal girders and / or transverse girders. The present invention makes the plate very stable during barging; it can avoid scratches caused by the contact between the plate and the longitudinal and transverse girders on the barging bracket; the auxiliary nylon belt can play a role in assisting in enhancing the stability of the barging process. For short-distance barging, the stability of the barging process can be better controlled, and the plate can be rotated in the same direction to avoid scratches on the plate surface caused by slight displacement between the plate surface and the auxiliary girders on the barging bracket when the plate is transferred or barged; for long-distance barging, stability is the main consideration, so the adjacent auxiliary girders rotate in opposite directions to form a triangular arrangement or a V-shaped arrangement, forming a more stable structure and ensuring the stability of the barging. The longitudinal and transverse girders of the barging bracket of the present invention are connected and bear force as a whole. There is no risk of collapse after the plate is put on the shelf, reducing safety hazards.

Description

Technical Field

[0001] The invention relates to a plate barging bracket for shipbuilding and a use method thereof. Background Art

[0002] In processes such as shipbuilding, a large number of plates must be loaded onto shelves and transferred from forming and panelizing areas to assembly areas. Since the plates are flexible structures, they sag after being loaded onto shelves, causing lateral forces to squeeze the brackets and posing a risk of collapse. In addition, there are also non-rectangular or special-shaped plates. How to avoid lateral forces for plates with different structural forms or how to make the bracket structure more reasonable and save more materials while still avoiding the risk of collapse caused by lateral forces squeezing the brackets is also a problem that technicians in the field of shipbuilding need to face. In addition, how to avoid scratches on the surface of the plates caused by slight displacement at the contact point between the plate surface and the barge bracket when transferring or barging the plates is also a problem that those skilled in the art urgently need to solve. There are no reports on this aspect in the prior art, and it has only been seen in similar fields, such as the paper "Tensioning Device for the Winding System of the Flat-lying Bracket Trolley of the Shore Container Crane" published by Fan Dongfeng in the 12th issue of "Lifting and Conveying Machinery" magazine in 2021. However, its field is different from this field, and it solves defects in manufacturing, transportation work, assembly, maintenance, etc. It does save time and costs in design, processing, production, assembly, and maintenance. For renewal projects, it ensures the interchangeability of key components and reduces spare parts production costs. However, it targets the tensioning device of the winding system of the bracket trolley and does not provide reference for problems in this field. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects in the prior art and provide a plate transport bracket for shipbuilding. The bracket is connected by longitudinal and transverse girders and is subjected to overall force. There is no risk of collapse after the plates are put on the bracket, thereby reducing safety hazards.

[0004] To achieve the above objectives, the present invention provides a shipbuilding plate transfer bracket comprising longitudinal and transverse beams that are cross-connected and fixedly connected, with support legs fixedly attached beneath the longitudinal and / or transverse beams. The bracket's longitudinal and transverse beams are connected, providing overall load-bearing support, preventing the risk of plate collapse after loading, thus reducing safety hazards.

[0005] A further technical solution is that at least two transverse girders are provided, and at least three longitudinal girders are provided, and the transverse girders are longer than the longitudinal girders.

[0006] A further technical solution involves sliding a channel-shaped frame onto the sidewalls of the longitudinal girders on the extreme sides of the barge bracket. Channel-shaped frames are also slidably mounted on the sidewalls of the longitudinal girders on the barge bracket adjacent to the extreme longitudinal girders. The two pairs of channel-shaped frames are positioned opposite each other, with auxiliary struts fixedly connected between them. This arrangement allows auxiliary struts to be slid under the protruding portions of irregularly shaped sheet metal to stabilize the sheet metal during transport. However, this arrangement eliminates the need for additional girder members, simplifying the bracket structure and reducing the material used. Furthermore, this arrangement provides greater flexibility, allowing the position of the auxiliary struts to be adjusted to suit the specific irregularly shaped sheet metal.

[0007] A further technical solution involves installing rubber elements on the transverse and longitudinal girders, with multiple elements installed on each transverse or longitudinal girder, with spacing between adjacent elements. This arrangement prevents the sheet materials from directly contacting the transverse or longitudinal girders, but rather the rubber elements. This prevents surface scratches and other defects caused by slight displacement of the sheet materials against the transverse and longitudinal girders during transfer and transport. Furthermore, contact with the rubber elements increases friction, making the transport process more stable.

[0008] A further technical solution is that the rubber piece is a rubber block or a rubber ball;

[0009] The rubber member is fixedly connected to the surface of the transverse or longitudinal girder facing the sheet material; or the surface of the transverse and longitudinal girder facing the sheet material is hingedly connected to an auxiliary girder, the auxiliary girder being arranged parallel to the transverse or longitudinal girder to which it is hinged, and the rubber member is fixedly connected to the surface of the auxiliary girder facing the sheet material. Prior to transfer, the auxiliary girder on adjacent transverse girders is arranged non-parallel (i.e., one is rotated to one side until it cannot rotate anymore, and the other is rotated to the other side until it cannot rotate anymore). This allows the two auxiliary girders on adjacent transverse girders to form a V-shape or a triangular arrangement after the sheet material is placed on the transfer bracket. Once the sheet material is placed on these, combined with the rubber blocks or rubber balls on the auxiliary girder, the sheet material remains very stable during transfer (the situation on the longitudinal girder is similar). Rubber balls / blocks are fixed on the surface of the longitudinal and transverse beams facing the plates. On the one hand, this increases the friction between the longitudinal and transverse beams and the plates to ensure safety during transportation; on the other hand, the rubber blocks / rubber balls are used to prevent the plates from directly contacting the longitudinal and transverse beams made of hard material, but from contacting the rubber blocks / rubber balls made of flexible material, thus avoiding scratches caused by the contact between the plates and the longitudinal and transverse beams on the transport bracket.

[0010] A further technical solution is that support legs are provided at both ends of each longitudinal girder, and hooks are provided at the four end points of the longitudinal girder on the two sides in the transverse direction; nylon slings for lifting the entire lightering bracket are provided in conjunction with the hooks;

[0011] The barge bracket is also equipped with auxiliary nylon belts to maintain the stability of the plate barge. There are two or four auxiliary nylon belts; the two ends of the auxiliary nylon belts are fixedly connected to the hooks, or fixedly connected to the side walls of the transverse girder or longitudinal girder; the height of the connection point between the auxiliary nylon belt and the barge bracket is consistent with the height of the plate placed on the barge bracket; the length of the horizontal auxiliary nylon belt is greater than the length of the transverse girder, and the length of the longitudinal auxiliary nylon belt is greater than the length of the longitudinal girder. The auxiliary nylon belt is set on the edge of the entire barge bracket (set on the outermost transverse girder or longitudinal girder). When barging plates of conventional shapes, the auxiliary nylon belt can be attached to the side end surface of the plate to assist in maintaining the stability of the barge process. The length of the auxiliary nylon belt is set to be slightly larger than the length of the girder (transverse girder or longitudinal girder) to which it is connected. In this way, before the barge starts, the friction section on the auxiliary nylon belt can ensure that the auxiliary nylon belt can be attached to the side end surface of the plate even if it is not in a taut state. If the plate moves during the barge process, the auxiliary nylon belt will be able to support the plate, maintaining the safety and stability of the barge process.

[0012] Another technical solution is to set support legs at both ends of each longitudinal girder, and set hooks on the four end points of the longitudinal girder on the two sides in the transverse direction; and match the hooks with nylon slings for lifting the entire lightering bracket;

[0013] The barge bracket is also equipped with auxiliary nylon belts to maintain the stability of the plate barge. There are two or four auxiliary nylon belts; the two ends of the auxiliary nylon belts are fixedly connected to the hooks, or fixedly connected to the side walls of the transverse girder or longitudinal girder; the height of the connection point between the auxiliary nylon belt and the barge bracket is consistent with the height of the plate placed on the barge bracket; the length of the horizontal auxiliary nylon belt is greater than the length of the transverse girder, and the length of the longitudinal auxiliary nylon belt is greater than the length of the longitudinal girder.

[0014] The present invention also provides a technical solution, which is a method for using a plate barging bracket for shipbuilding, comprising the following steps:

[0015] S1: Rotate the auxiliary girder relative to the transverse girder or longitudinal girder, and then place the plate to be transferred on the auxiliary girder of the transfer bracket;

[0016] S2: For special-shaped plates, slide the channel steel frames so that the auxiliary support rods fixed between the two pairs of channel steel frames are located under the edge of the special-shaped plate;

[0017] S3: Adjust the auxiliary nylon belt to the side surface of the plate so that it can help stabilize the plate if it moves during transportation.

[0018] S4: Fasten two nylon slings to four hooks respectively, and then use a ring-shaped nylon sling hung on the crane hook to lift the two nylon belts. After the crane starts, the plates can be transferred and transported.

[0019] Whether the auxiliary girders rotate in the same direction or in opposite directions depends on whether the transport is long or short distance. In short-distance transport, the stability of the transport process is better guaranteed, and they can rotate in the same direction to avoid scratches and other damage to the plate surface caused by slight displacement between the plate surface and the auxiliary girders on the transport bracket when transferring and transporting the plates (although rubber parts have been installed on the auxiliary girders, the existence of slight displacement means that there may still be a certain amount of friction and contact between the rubber parts and the plate surface, causing surface damage). In long-distance transport, stability is the main consideration, so adjacent auxiliary girders rotate in opposite directions, forming a triangular or V-shaped arrangement, forming a more stable structure and ensuring stable transport. In order to better achieve the goal of preventing scratches on the surface of the plate from occurring when there is a slight displacement between the surface of the plate and the auxiliary girder on the barge bracket during short-distance bargeing, the rubber part on the auxiliary girder should be set to a rubber roller form. Although it is set to a rubber roller (the rubber roller is rotated relative to the auxiliary girder), due to the setting of the auxiliary nylon belt on the edge of the bracket, there is no need to worry about safety issues during the bargeing process. When it is set to a rubber roller form, when there is a slight displacement between the surface of the plate and the auxiliary girder on the barge bracket, the rubber roller will rotate first, and then the auxiliary nylon belt will "catch" the plate, which can prevent scratches on the surface of the plate and other damage defects.

[0020] The advantages and beneficial effects of the present invention are that the bracket is connected with the longitudinal and transverse girders and is subjected to stress as a whole, and there is no risk of collapse after the plates are put on the rack, thus reducing safety hazards.

[0021] For special-shaped plates, auxiliary support rods can be slid under the protruding parts of the special-shaped plates to stabilize the plates during transportation. However, this setting does not require the addition of a whole girder, thus simplifying the structure of the bracket and reducing the material used for the bracket. This setting is also more flexible and the position of the auxiliary support rod can be adjusted according to the conditions of different special-shaped plates.

[0022] The plates do not directly contact the transverse or longitudinal girders, but contact the rubber parts. This can avoid damage defects such as scratches on the plate surface caused by slight displacement of the plate surface and the longitudinal and transverse girders on the barge bracket when the plate is transferred or barge. The contact with the rubber parts increases the friction and makes the barge process more stable.

[0023] The auxiliary beams on adjacent transverse beams are arranged non-parallel before transport (that is, one rotates to one side until it cannot rotate anymore, and the other rotates to the other side until it cannot rotate anymore). In this way, after the plate is placed on this transport bracket, the two auxiliary beams on the adjacent transverse beams are arranged in a V shape or a triangle. After the plate is placed on it, combined with the setting of rubber blocks or rubber balls on the auxiliary beams, the plate will be very stable during transport (the situation on the longitudinal beams is similar). Rubber balls / blocks are fixedly set on the surface of the longitudinal and transverse beams facing the plate. On the one hand, the friction between the longitudinal and transverse beams and the plate is increased to ensure safety during transport; on the other hand, the setting of rubber blocks / rubber balls makes it so that the plate no longer directly contacts the longitudinal and transverse beams made of hard material, but contacts the rubber blocks / rubber balls made of flexible material, avoiding scratches caused by the contact between the plate and the longitudinal and transverse beams on the transport bracket.

[0024] The auxiliary nylon belt is set on the edge of the entire barge bracket (set on the outermost transverse girder or longitudinal girder). When barging plates of conventional shapes, the auxiliary nylon belt can be attached to the side end surface of the plate to assist in maintaining the stability of the barge process. The length of the auxiliary nylon belt is set to be slightly larger than the length of the girder (transverse girder or longitudinal girder) to which it is connected. In this way, before the barge starts, the friction section on the auxiliary nylon belt can ensure that the auxiliary nylon belt can be attached to the side end surface of the plate even if it is not in a taut state. If the plate moves during the barge process, the auxiliary nylon belt will be able to support the plate, maintaining the safety and stability of the barge process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of a first embodiment of a plate barging bracket for shipbuilding according to the present invention;

[0026] Figure 2 yes Figure 1 A top view of

[0027] Figure 3 yes Figure 1 A schematic diagram after the transfer of the plates and auxiliary support rods is added;

[0028] Figure 4 yes Figure 2 A schematic diagram showing the hook and rubber block;

[0029] Figure 5 yes Figure 4 A schematic diagram showing the addition of nylon slings;

[0030] Figure 6 yes Figure 1 A schematic diagram showing conventional rectangular lightering plates and auxiliary nylon straps is added;

[0031] Figure 7 yes Figure 6Bottom view of the auxiliary nylon strap in the upper middle;

[0032] Figure 8 is a schematic diagram of a second embodiment of the present invention;

[0033] Figure 9 yes Figure 8 Top view of .

[0034] In the figure: 1. Longitudinal girder; 2. Transverse girder; 3. Support leg; 4. Channel steel frame; 5. Auxiliary support rod; 6. Rubber part; 7. Hook; 8. Nylon sling; 9. Auxiliary nylon belt; 10. Auxiliary girder; 11. Friction section. DETAILED DESCRIPTION

[0035] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0036] Example 1:

[0037] like Figures 1 to 7 As shown (for ease of illustration, Figure 1 The hooks, rubber parts, auxiliary struts and nylon slings are not shown; Figure 1 and Figure 2(The barge plates on the bracket are not shown). The present invention is a plate barge bracket for shipbuilding, comprising longitudinal girders 1 and transverse girders 2 that are cross-fixed and connected, with support legs 3 fixedly connected below the longitudinal girders 1 and / or transverse girders 2. There are at least two transverse girders 2, and at least three longitudinal girders 1. The transverse girders 2 are longer than the longitudinal girders 1. A channel-shaped frame 4 is slidably provided on the side walls of the longitudinal girders 1 at the extreme sides of the barge bracket. Channel-shaped frames 4 are also slidably provided on the side walls of the longitudinal girders 1 on the barge bracket that are close to the extreme side longitudinal girders 1. The two pairs of channel-shaped frames 4 are arranged opposite each other, and auxiliary support rods 5 are fixedly connected between the two pairs of channel-shaped frames 4. Rubber parts 6 are provided on the transverse girders 2 and the longitudinal girders 1. Several rubber parts 6 are provided on each transverse girder 2 or longitudinal girder 1, and spacing is provided between adjacent rubber parts 6. The rubber part 6 is a rubber block; the rubber part 6 is fixedly connected to the surface of the transverse girder 2 or the longitudinal girder 1 facing the plate; the support legs 3 are arranged at both ends of each longitudinal girder 1, and hooks 7 are arranged on the four end points of the longitudinal girder 1 on the two sides in the transverse direction; a nylon sling 8 for lifting the entire transfer bracket is provided in conjunction with the hook 7; the transfer bracket is also provided with an auxiliary nylon belt 9 for maintaining the stability of the plate transfer, and two auxiliary nylon belts 9 are provided; the two ends of the auxiliary nylon belt 9 are fixedly connected to the side walls of the transverse girder 2 or the longitudinal girder 1; the height of the connection point of the auxiliary nylon belt 9 and the transfer bracket is consistent with the height of the plate placed on the transfer bracket; the length of the auxiliary nylon belt 9 arranged transversely is greater than the length of the transverse girder 2, and the length of the auxiliary nylon belt 9 arranged longitudinally is greater than the length of the longitudinal girder 1. A friction section 11 is provided on the auxiliary nylon belt 9 near both ends. The friction section 11 is a nylon protrusion section integrally or fixedly provided on the belt body of the auxiliary nylon belt 9. The friction section 11 includes a plurality of nylon protrusions and a spacing is provided between adjacent nylon protrusions.

[0038] The method for using the plate barging bracket for shipbuilding includes the following steps:

[0039] S1: Place the plate to be transported on the beam of the transport bracket, and the plate is in contact with the rubber member 6 on the transverse beam 2 or the longitudinal beam 1;

[0040] S2: For the special-shaped plate, slide the channel steel frame 4 so that the auxiliary support rods 5 fixed respectively between the two pairs of channel steel frames 4 are located under the edge of the special-shaped plate;

[0041] S3: Adjust the auxiliary nylon belt 9 to the side surface of the plate so that if the plate moves during transportation, the auxiliary nylon belt 9 can play an auxiliary stabilizing role;

[0042] S4: Buckle two nylon slings 8 on four hooks 7 respectively, and then use a ring-shaped nylon sling 8 hung on the crane hook 7 to lift the two nylon belts. After the crane is started, the plates can be transferred and transported.

[0043] Here’s how it works:

[0044] A friction section 11 is provided on the auxiliary nylon belt near its two ends. The friction section is a nylon protrusion section integrally or fixedly provided on the belt body of the auxiliary nylon belt. The aforementioned friction section includes a plurality of nylon protrusions and a spacing is provided between adjacent nylon protrusions (so that when the auxiliary nylon belt is put on the edge of the plate, the setting of the friction section can enhance the contact between the auxiliary nylon belt and the plate during transportation, and the auxiliary nylon belt will not fall off and will hardly slide).

[0045] In order to ensure that the auxiliary nylon belt does not fall off the plate during the transport process, adhesive can be applied to the friction section 11 during use so that if the plate moves to one side during transport, the auxiliary nylon belt on the other side will not fall off the plate.

[0046] Example 2:

[0047] The difference from the first embodiment is that Figure 8 、 Figure 9 As shown (for ease of illustration, Figure 9 Only some auxiliary girder are shown, the surface of the transverse girder 2 and the longitudinal girder 1 facing the plate is hingedly connected with an auxiliary girder 10, and the auxiliary girder 10 is arranged parallel to the transverse girder 2 or the longitudinal girder 1 to which it is hinged, and the rubber member 6 is fixedly connected to the surface of the auxiliary girder 10 facing the plate.

[0048] The method for using the plate barging bracket for shipbuilding includes the following steps:

[0049] S1: Rotate the auxiliary girder 10 relative to the transverse girder 2 or the longitudinal girder 1, and then place the plate to be transferred on the auxiliary girder 10 of the transfer bracket;

[0050] S2: For the special-shaped plate, slide the channel steel frame 4 so that the auxiliary support rods 5 fixed respectively between the two pairs of channel steel frames 4 are located under the edge of the special-shaped plate;

[0051] S3: Adjust the auxiliary nylon belt to the side surface of the plate so that it can help stabilize the plate if it moves during transportation.

[0052] S4: Buckle the two nylon slings to the four hooks 7 respectively, and then use a ring-shaped nylon sling hung on the crane hook 7 to lift the two nylon belts. After the crane is started, the plates can be transferred and transported.

[0053] Here’s how it works:

[0054] Whether the auxiliary girders rotate in the same direction or in the opposite direction depends on whether the transport is long-distance or short-distance. For short-distance barging, the stability of the barging process is better guaranteed, and the barging brackets can rotate in the same direction to avoid scratches and other damage defects on the plate surface caused by slight displacement of the plate surface and the auxiliary beams on the barging bracket when transferring and barging the plates (although rubber parts have been set on the auxiliary beams, the existence of slight displacement means that there may still be a certain amount of friction and contact between the rubber parts and the plate surface, causing surface damage; the rubber parts on the auxiliary beams are set in the form of rubber rollers. Although they are set as rubber rollers (the rubber rollers are rotated relative to the auxiliary beams), there is no need to worry about safety issues during the barging process due to the setting of auxiliary nylon belts on the edge of the bracket. When they are set in the form of rubber rollers, when there is a slight displacement between the plate surface and the auxiliary beams on the barging bracket, the rubber rollers will rotate first, and then the auxiliary nylon belts will "catch" the plate, which can prevent scratches and other damage defects on the plate surface.); for long-distance barging, stability is the main consideration, so the adjacent auxiliary beams rotate in opposite directions to form a triangular arrangement or a V-shaped arrangement, forming a more stable structure to ensure the stability of the barging.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A plate barging bracket for shipbuilding, characterized in that: It includes longitudinal girders and transverse girders that are cross-fixed and connected, and support legs are fixedly connected below the longitudinal girders and / or transverse girders; There are at least two transverse girders and at least three longitudinal girders, and the transverse girders are longer than the longitudinal girders; A channel steel frame is slidably provided on the side walls of the longitudinal girders located on the two extreme sides of the barge bracket, and a channel steel frame is also slidably provided on the side walls of the longitudinal girders close to the two extreme sides of the barge bracket. The two pairs of channel steel frames are arranged opposite to each other and auxiliary support rods are fixedly connected between the two pairs of channel steel frames.

2. A plate barging bracket for shipbuilding according to claim 1, characterized in that: The transverse girder and the longitudinal girder are provided with rubber pieces, and each transverse girder or longitudinal girder is provided with a plurality of rubber pieces, and a spacing is provided between adjacent rubber pieces.

3. A plate barging bracket for shipbuilding according to claim 2, characterized in that: The rubber piece is a rubber block or a rubber ball; The rubber member is fixedly connected to the surface of the transverse girder or longitudinal girder facing the plate; or the surface of the transverse girder and longitudinal girder facing the plate is hingedly connected to an auxiliary girder, the auxiliary girder is arranged parallel to the transverse girder or longitudinal girder to which it is hinged, and the rubber member is fixedly connected to the surface of the auxiliary girder facing the plate.

4. A plate barging bracket for shipbuilding according to claim 3, characterized in that: The support legs are provided at both ends of each longitudinal girder, and hooks are provided at the four end points of the longitudinal girder on the two sides in the transverse direction; nylon slings for lifting the entire lightering bracket are provided in conjunction with the hooks; The barge bracket is also equipped with auxiliary nylon belts to maintain the stability of the plate barge. There are two or four auxiliary nylon belts; the two ends of the auxiliary nylon belts are fixedly connected to the hooks, or fixedly connected to the side walls of the transverse girder or longitudinal girder; the height of the connection point between the auxiliary nylon belt and the barge bracket is consistent with the height of the plate placed on the barge bracket; the length of the horizontal auxiliary nylon belt is greater than the length of the transverse girder, and the length of the longitudinal auxiliary nylon belt is greater than the length of the longitudinal girder.

5. The plate barging bracket for shipbuilding according to claim 1, characterized in that: The support legs are provided at both ends of each longitudinal girder, and hooks are provided at the four end points of the longitudinal girder on the two sides in the transverse direction; nylon slings for lifting the entire lightering bracket are provided in conjunction with the hooks; The barge bracket is also equipped with auxiliary nylon belts to maintain the stability of the plate barge. There are two or four auxiliary nylon belts; the two ends of the auxiliary nylon belts are fixedly connected to the hooks, or fixedly connected to the side walls of the transverse girder or longitudinal girder; the height of the connection point between the auxiliary nylon belt and the barge bracket is consistent with the height of the plate placed on the barge bracket; the length of the horizontal auxiliary nylon belt is greater than the length of the transverse girder, and the length of the longitudinal auxiliary nylon belt is greater than the length of the longitudinal girder.

6. The method for using the plate barging bracket for shipbuilding according to claim 4, characterized in that: The steps include: S1: Rotate the auxiliary girder relative to the transverse girder or longitudinal girder, and then place the plate to be transferred on the auxiliary girder of the transfer bracket; S2: For special-shaped plates, slide the channel steel frames so that the auxiliary support rods fixed between the two pairs of channel steel frames are located under the edge of the special-shaped plate; S3: Adjust the auxiliary nylon belt to the side surface of the plate so that it can help stabilize the plate if it moves during transportation. S4: Fasten two nylon slings to four hooks respectively, and then use a ring-shaped nylon sling hung on the crane hook to lift the two nylon belts. After the crane starts, the plates can be transferred and transported.

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