Application method for positioning device for coating of pilates wooden barrel

Abstract

The invention discloses an application method of a positioning device for coating of a pilates wooden barrel. The device has the capacity of accurately locking an arc-shaped wooden barrel and a cover material, and structurally comprises a locking execution mechanism, a grabbing component, a holding component and a stretching and coating mechanism. The innovation is that the locking execution mechanism comprises a beam plate fixed with an external device or component, a pressing part mounted on the beam plate, and a holding part positioned below the beam plate. The other innovation is the design of an enclasping part, the enclasping part comprises a fixed enclasping block located under the beam plate and two movable enclasping blocks located on the two sides of the fixed enclasping block, and the two movable enclasping blocks are hinged to the frame of the external frame body and comprise power air cylinders pushing the movable enclasping blocks to rotate. According to the design of the device, convenience and practicability of operation are considered, the grabbing component and the holding component can accurately grab and fix the arc-shaped wooden barrel, and the stretching and wrapping mechanism can effectively flatten and stretch a cover material.

Description

[0001] This application is a divisional application of the Chinese patent application filed on June 14, 2023, with application number 2023107063759 and invention name “Positioning device and its application method”. Technical Field

[0002] The invention belongs to the technical field of sports equipment auxiliary devices, in particular to a positioning device and a positioning method for covering a Pilates wooden barrel. Background Art

[0003] The Pilates barrel is a special Pilates fitness equipment, which mainly consists of two components: one is a semi-circular arc barrel 01, and the other is a wooden ladder with a step-shaped railing 02. This equipment plays a key role in performing various Pilates movements and can effectively help improve the user's body flexibility, strength and balance. Figure 1 The Pilates barrel is shown.

[0004] Of the two parts, the arc barrel 01 is an important part of the equipment. Generally speaking, it uses a solid wood frame 03 and is equipped with a soft cushion 04 to provide good support and comfort. Its unique curve design helps users perform various stretching and strengthening movements according to the natural curvature of the body.

[0005] The soft cushion 04 is mainly composed of two materials: Firstly, foam materials 05, for example, polyurethane foams are often used as the main filling material of cushions because they provide good cushioning and can be properly molded to the user's body shape.

[0006] Next is the cover material 06, which is usually made of synthetic materials (such as PVC or vinyl) or natural materials (such as leather) and is mainly used to protect the internal foam material from damage and provide a clean and hygienic surface.

[0007] Since the arc barrel 01 is large in size and heavy in weight, during its production process, the foam material needs to be cut into the required shape and size first, and then fixed to the wooden frame. Next, the cover material is cut to cover the connection between the foam material and the frame. During the whole process, in order to improve production efficiency and reduce labor intensity, the maker usually uses a special positioning jig to fix the arc barrel 01. However, before fixing, it is necessary to adjust the position of the arc barrel 01 through positioning backrests, measuring sensors and other equipment or manually, so that the cover material fits the foam material and the frame evenly and tightly together. However, due to the volume and weight of the arc barrel 01, the adjustment process generally requires multiple adjustments and repeated proofreading, thus affecting production efficiency. Summary of the invention

[0008] In view of the above-mentioned problems, the present invention provides a positioning device for covering a Pilates wooden barrel, which combines an electric actuator and a micro sensor to improve the accuracy and efficiency of the covering process. Its unique structure and design make the stable positioning of the wooden barrel, the flattening and stretching of the cover material, and the automatic control of the covering process possible and simple, thereby greatly improving production efficiency and product quality.

[0009] The invention objective of the present invention is achieved through the following technical scheme: a positioning device for covering a Pilates wooden barrel, the device is used to lock the curved wooden barrel and the cover material, and includes a locking actuator, the locking actuator includes a beam plate fixed to an external device or component, a pressing component installed on the beam plate, and a holding component located below the beam plate. The positioning device can improve the stability and accuracy of the covering process by locking the curved wooden barrel and the cover material, thereby improving the product quality.

[0010] Preferably, the clamping component includes a fixed clamping block located directly below the beam plate and two movable clamping blocks located on both sides of the fixed clamping block, wherein the two movable clamping blocks are hinged to the frame of the external frame and include a power cylinder for driving the two movable clamping blocks to rotate. Through the hinge connection between the movable clamping blocks and the external frame and the driving of the power cylinder, the position of the clamping component can be flexibly adjusted, thereby improving the adaptability of the equipment and the convenience of operation.

[0011] Preferably, the pressing member comprises a pressing cylinder and a pressing beam plate installed at its telescopic end. Using the pressing cylinder and the pressing beam plate as the pressing member can ensure that the arc-shaped wooden barrel is stably maintained in the correct position, thereby improving the efficiency of the covering process.

[0012] Preferably, the device also has a gripping component with guiding and clamping functions, which is used to grip and position the curved wooden barrel. Adding the gripping component with guiding and clamping functions can conveniently position and clamp the curved wooden barrel, making the covering process smoother.

[0013] As preferred, the gripping component comprises two detachable clamping seats, which are fixed on the lower pressing beam plate. The detachable clamping seats are fixed on the lower pressing beam plate, and the clamping seats can be easily replaced and adjusted, which increases the flexibility and adjustability of the equipment.

[0014] Preferably, rolling supports for lateral movement and rotation are added to the arc extension ends of the two movable holding blocks. Adding rolling supports to the arc extension ends of the movable holding blocks can make the device more stable during lateral movement and rotation and reduce the difficulty of operation.

[0015] Preferably, the positioning device further comprises a stretching and covering mechanism, which is used to flatten and stretch the cut cover material at one time. The positioning device comprising the stretching and covering mechanism can flatten and stretch the cover material at one time, reducing the operation steps and improving the work efficiency.

[0016] Preferably, the stretching and covering mechanism comprises two hinge frames, each hinge frame has a telescopic gear at the far end, and two stretching cylinders, whose main bodies are fixed under the hinge frames, and the telescopic parts are fixedly connected to the telescopic gear. Through the two hinge frames and the two stretching cylinders, the flattening and stretching of the cover material can be flexibly adjusted and controlled, thereby improving the covering quality of the cover material.

[0017] As a preferred method, the locking actuator, the grabbing component, the holding component and the stretching and wrapping mechanism are upgraded to electric actuators, and a micro sensor is added to monitor the position of the curved barrel in real time, and the movement of the electric actuator is adjusted through an automatic control system. Upgrading each component to an electric actuator and adding micro sensors and automatic control systems can automatically monitor and adjust the operating status of the equipment, reduce the difficulty of operation, and improve work efficiency and product quality.

[0018] As a preferred embodiment, a set of pressure sensing system is added to each clamping seat to monitor the force of clamping the curved wooden barrel. Adding a pressure sensing system to the clamping seat can monitor and adjust the force of clamping the curved wooden barrel in real time, ensuring the stability of product quality.

[0019] Preferably, a heat treatment module is added to heat treat the cover material after it is flattened and stretched, so that the cover material can better fit the curved barrel and improve the durability of the cover material. The added heat treatment module can heat treat the cover material after it is flattened and stretched, so that the cover material can better fit the curved barrel, improving the durability and appearance quality of the product.

[0020] Preferably, a guide mechanism is provided between the hinge frame and the telescopic gear. The guide mechanism provided between the hinge frame and the telescopic gear can better control the operation of the device and improve the covering quality of the product.

[0021] In view of the above problems, the present invention further provides a positioning method for a Pilates barrel leather-covered positioning device, comprising the following steps: a. Start the two movable blocks to the set angle so that the curved barrel can be stably placed on the rolling support; b. The lower pressure beam plate moves downward under the drive of the lower pressure cylinder, and the two clamp seats respectively enter the side plates of the two frames of the arc-shaped wooden barrel until the pressure strips touch the frame side plates, and then the pneumatic clamps on both sides clamp the frame side plates on both sides, and the lower pressure cylinder drives it to rise, and the arc-shaped wooden barrel rises accordingly, and the two movable holding blocks return to the flattened position; c. The corresponding power source controls the two hinged frames to a flattened state and controls the two cover layer clamps to an open state; d. The cover material is laid, and the two ends enter the clamping range of the corresponding side cover layer clamping members, and the clamping cylinder is started, and the two cover layer clamping members clamp the corresponding side cover material ends; e. The stretching cylinders on both sides start stretching outwards at the same time to stretch the cover material flat; f. The downward pressure cylinder drives the downward pressure beam plate downward, placing and pressing the curved wooden barrel on the fixed holding block, and the corresponding power cylinder drives the two hinged frames to rotate around the curved wooden barrel until the curved wooden barrel is completely covered; g. The corresponding power cylinder pushes the two movable blocks to gradually press the curved barrel covered by the cover material from both sides, and the cover material is flatly wrapped with the foam material over a large area. The two cover layer clamps are loosened to reset the two hinged frames; h. The staff uses fixings such as staples to connect the cover material to the frame, and cuts off the excess material after completion; i. Finally, loosen the lower pressure beam and movable holding blocks, move the curved wooden barrel away, and complete the covering work.

[0022] The beneficial effects of this method are mainly reflected in the following aspects: This positioning method uses movable blocks and rolling supports to stably position the curved barrel, reducing deviations during operation and improving the accuracy of covering. The use of the downward pressure beam plate and pneumatic clamps can accurately position and clamp the curved barrel, further ensuring the stability of the covering process. By controlling the movement of the hinged frame and the cover layer clamps, the coverage and tension of the cover material can be flexibly adjusted and controlled to ensure the uniformity and quality of the covering. The stretching cylinder can quickly flatten the cover material, simplifying the operation process and improving work efficiency. The reasonable use of the downward pressure cylinder and the power cylinder can ensure the stability of the curved barrel during the covering process, while retaining the shape of the curved barrel as much as possible, improving the quality of the covering.

[0023] In summary, the present invention has the following advantages compared with the prior art: High-precision positioning: The design of the device keeps the curved barrel stable during the covering process, effectively preventing deviation and improving product quality and consistency.

[0024] Improve efficiency: Through the automated control system and the precise collaboration of related power cylinders, gripping components, clamping components and other mechanisms, the time for covering work is greatly shortened and production efficiency is improved.

[0025] Enhanced adaptability: The equipment can flexibly cope with the deviation of the curved barrel workstation transfer, showing strong adaptability and improving production flexibility.

[0026] Optimize product quality: Through precise force control and real-time feedback from micro sensors, the tight fit of the cover material can be guaranteed, thus improving the quality of the cover and the durability of the product.

[0027] In general, this positioning device and its covering method bring a more efficient, precise and flexible solution to the production of Pilates wooden barrels, which improves production efficiency, improves product quality, and realizes the intelligent upgrade of the work process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the prior art Pilates wooden barrel; Figure 2 It is a structural schematic diagram of the arc barrel of the prior art; Figure 3 A schematic diagram of the structure of the present invention; Figure 4 The state diagram when grabbing the arc barrel for grabbing parts; Figure 5 This is a state diagram of the arc barrel grabbing and being grabbed, and the cover material is laid; Figure 6 It is a structural schematic diagram of the arc barrel being covered by the cover layer and being held tightly by the movable holding block; Figure 7 It is a schematic diagram of the structure of the grabbing component; Figure 8 It is a schematic diagram of the structure of the movable holding block and the roller support, in which the outer cylinder is partially cut open.

[0029] Markings in the figure: Arc barrel 01, wooden ladder 02, skeleton 03, cushion 04, foam material 05, cover material 06, beam 07, locking actuator 10, pressing component 11, pressing cylinder 111, pressing beam 112, holding component 12, fixed holding block 121, movable holding block 122, first power cylinder 123, second power cylinder 124, grabbing component 13, clamping seat 131, pressure strip 132, pneumatic clamp 133, roller support 14, long core shaft 141, outer cylinder 142, ring 143, compression spring 144, stretching and covering mechanism 20, hinged frame 21, telescopic gear 22, stretching cylinder 23, third power cylinder 24, fourth power cylinder 25, cover layer clamp 26, clamping cylinder 27. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings. Figure 1-8 All drawings; Example 1 Figure 3The positioning device for Pilates barrel covering is shown. It is used to lock the curved barrel 01 and cover material 06 to be covered, so as to facilitate the covering operation. During the locking process, it can automatically adjust the position of the curved barrel 01 so that it fits the locking part completely. It mainly includes: The locking actuator 10 includes a beam plate 07 fixed to an external device or component, a pressing component 11 installed on the beam plate 07, and a clamping component 12 located below the beam plate 07. The clamping component 12 includes a fixed clamping block 121 located directly below the beam plate 07 and two movable clamping blocks 122 located on both sides of the fixed clamping block 121. The two movable clamping blocks 122 are hinged to the frame of the external frame and respectively include first and second power cylinders 123 and 124 that drive them to rotate. The pressing component 11 includes a pressing cylinder 111 and a pressing beam plate 112 installed at its telescopic end. The concave arc surfaces of the two movable clamping blocks 122 and the fixed clamping block 121 should match the curvature of the curved wooden barrel 01.

[0031] During the locking process, the degree of deflection of the curved barrel 01 determines the quality of the leather covering. Previously, sensors were required to detect the actual deviation and manually adjust the position, which affected production efficiency. Therefore, we made the following optimization design: A grabbing component 13 with guiding and clamping functions is added to the pressing component 11 to grab and position the arc-shaped wooden barrel 01. The grabbing component 13 includes two detachable clamping seats 131 fixed on the pressing beam plate 112. The clamping seat 131 has an opening on the lower side, outer inclined surfaces on both sides, a pressure strip 132 at the bottom of the opening, and pneumatic clamps 133 on both sides. The inner size of the opening is slightly larger than the thickness of the side plate of the frame 03, and the distance between the two clamping seats 131 matches the center distance between the two side plates of the frame 03 of the arc-shaped wooden barrel 01 in the thickness direction.

[0032] By opening and closing the movable holding block 122, the arc-shaped wooden barrel 01 can be temporarily stopped within a certain range. Figure 4 .

[0033] A rolling support 14 is added at the arc extension end of the two movable holding blocks 122 to provide lateral movement and rotation. Figure 8 The rolling support member 14 includes a central shaft 141 with both ends fixed on the movable holding block 122, and a plurality of outer cylinders 142 rotatably sleeved on the central shaft 141. A collar 143 fixed on the central shaft 141 is provided in the middle of each outer cylinder 142, and the outer cylinder 142 can slide on the collar 143. The central part of the outer cylinder 142 has a diameter larger than the central shaft 141, forming a hollow section, and compression springs 144 sleeved on the central shaft 141 are provided at both ends. Each outer cylinder 142 can move freely within the compression range of the compression spring 144 on the central shaft 141, and the compression spring 144 is compressed to reset it when there is no load.

[0034] The positioning device also includes a stretching and covering mechanism 20, which is used to flatten and stretch the cut cover material 06 at one time, instead of tightening it step by step by hand, so as to facilitate the staff to fix the cover layer. Figure 5 As shown, it includes two hinge frames 21, which are respectively located on both sides of the fixed holding block 121 and coaxially hinged with a movable holding block 122; each hinge frame 21 has a telescopic gear 22 at the far end; two extension cylinders 23, the main body of which is fixed under the hinge frame 21, and the telescopic part is fixedly connected to the telescopic gear 22; the third and fourth power cylinders 24 and 25 respectively push the two hinge frames 21 to rotate; the cover layer clamping piece 26 is hinged on the side of each telescopic gear 22 away from the fixed holding block 121; the clamping cylinder 27, the main body is fixed on the telescopic free end of the extension cylinder 23, and the telescopic rod is hinged on the cover layer clamping piece 26. In order to optimize the design, a guide mechanism is provided between the hinge frame 21 and the telescopic gear 22, which can be a combination of a guide rod and a guide hole, or other forms, such as a guide rail and a guide track.

[0035] The overall workflow of the positioning device for Pilates barrel covering is as follows: 1. Start the two movable holding blocks 122 to the set angle so that the curved wooden barrel 01 can be stably placed on the rolling support 14 (see Figure 5 ), the movement of the curved wooden barrel 01 can be carried out by mechanical or manual means.

[0036] The lower pressing beam plate 112 moves downward under the drive of the lower pressing cylinder 111, and the two clamping seats 131 respectively enter the side plates of the two frames 03 of the curved wooden barrel 01 until the pressure strip 132 contacts the side plates of the frames 03. In this process, the curved wooden barrel 01 adjusts its position by rotating and lateral movement of the outer cylinder 142 at the temporary stop supported by the two movable holding blocks 122. Then, the pneumatic clamps 133 on both sides clamp the side plates of the frames 03 on both sides, and the lower pressing cylinder 111 drives it to rise, and the curved wooden barrel 01 rises accordingly, and the two movable holding blocks 122 return to the flattened position.

[0037] The corresponding power source controls the two hinge frames 21 to a flattened state, and controls the two cover layer clamping members 26 to an open state.

[0038] The cover material 06 is laid by mechanical means or manually, and the two ends enter the clamping range of the corresponding side cover layer clamping pieces 26 respectively, and the clamping cylinder 27 is started, and the two cover layer clamping pieces 26 clamp the corresponding side cover material 06 material ends respectively.

[0039] The stretching cylinders 23 on both sides start stretching at the same time, stretching the cover material 06 to be flat.

[0040] The downward pressure cylinder 111 drives the downward pressure beam plate 112 downward, placing and pressing the arc-shaped wooden barrel 01 on the fixed holding block 121, and the corresponding power cylinder pushes the two hinged frames 21 to rotate around the arc-shaped wooden barrel 01 until the arc-shaped wooden barrel 01 is completely covered.

[0041] The corresponding power cylinder pushes the two movable holding blocks 122 to gradually press the arc-shaped wooden barrel 01 covered by the cover material 06 from both sides, and the cover material 06 flatly wraps the foam material 05 over a large area. Loosen the two cover layer clamping pieces 26 and reset the two hinge frames 21.

[0042] The staff uses fixings such as nails to connect the cover material 06 to the frame, and cuts off the excess material after completion. Finally, loosen the lower pressure beam plate 112 and the movable holding block 122, move the curved wooden barrel 01 away, and complete the covering work.

[0043] Specifically, a company used a positioning device to cover a Pilates wooden barrel with a diameter of 1200mm and a height of 1000mm.

[0044] First, start the first power cylinder 123 and the second power cylinder 124 to drive the two movable holding blocks 122 to expand to an angle matching the curvature of the curved wooden barrel 01, and use them as temporary stop points to support the curved wooden barrel 01. Then the crane moves the curved wooden barrel 01 to the top of the positioning device, slowly descends to the support of the rolling support 14, and adjusts the position of the curved wooden barrel 01 by rotating the outer cylinder 142 so that its axis coincides with the positioning device.

[0045] The downward pressure cylinder 111 is started to drive the downward pressure beam plate 112 and the two clamping seats 131 downward into the gaps between the frames 03 on both sides of the curved wooden barrel 01. The pneumatic clamping pieces 133 clamp the frames 03 on both sides and lift the curved wooden barrel 01. The two movable holding blocks 122 tighten and fix the curved wooden barrel 01.

[0046] Control the third power cylinder 24 and the fourth power cylinder 25 to expand the two hinge frames 21. Start the clamping cylinder 27 to open the two cover layer clamps 26. Lay the 1 meter wide and 1.6 meter long cover material 06 on the movable holding block 122 and pull it to both sides, so that the end enters the clamping range of the cover layer clamp 26, and then clamps the material end.

[0047] The stretching cylinders 23 on both sides are started to stretch the cover material 06 to be basically flat. The pressing cylinder 111 and the two movable holding blocks 122 apply pressure to the cover material 06, and the third power cylinder 24 and the fourth power cylinder 25 push the two hinge frames 21 to rotate upward, so that the cover material 06 completely covers the arc-shaped wooden barrel 01.

[0048] The two movable holding blocks 122 are driven to gradually rotate from both sides toward the center until the arc-shaped wooden barrel 01 covered with the cover material 06 is pressed tightly, and the cover material 06 flatly wraps the foam material 05 over a large area.

[0049] Loosen the two cover layer clamps 26 and reset the two hinge frames 21. The staff uses the code nails to fix the cover material 06 on the frame 03 and cut off the redundant material.

[0050] Finally, release the pressing component 11 and the movable holding block 122, and use a crane to move the covered curved wooden barrel 01 away from the positioning device.

[0051] Example 2 On the basis of Example 1, we can further optimize the locking actuator 10, the grabbing component 13 and the stretching and covering mechanism 20 to improve their efficiency and accuracy.

[0052] Locking actuator 10: In Example 1, the pressing component 11 and the holding component 12 are used to lock the curved wooden barrel 01 in place. In Example 2, these two components can be further upgraded to electric actuators, which can provide higher precision when fine-tuning the position. In addition, a micro sensor can be added to monitor the position of the curved wooden barrel 01 in real time, and an automatic control system can be used to adjust the movement of the electric actuator to ensure that the curved wooden barrel 01 is always in the ideal position.

[0053] Grasping component 13: In embodiment 1, the grabbing component 13 includes two detachable clamping seats 131. In embodiment 2, we can add a pressure sensing system to each clamping seat 131 to monitor the force of clamping the curved wooden barrel 01 to avoid excessive pressure damaging the wooden barrel or too little pressure causing the wooden barrel to fail to shift and correct.

[0054] Stretching and wrapping mechanism 20: In embodiment 1, the stretching and wrapping mechanism 20 is used to flatten and stretch the cover material 06. In embodiment 2, we can add a heat treatment module to heat treat the cover material 06 after it is flattened and stretched, so that the cover material 06 can better fit the curved wooden barrel 01 and improve the durability of the cover material 06.

[0055] The above improvements can improve the efficiency and accuracy of the curved barrel covering operation, and also help to improve the covering quality.

[0056] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An application method for a Pilates barrel covering positioning device, characterized in that: The positioning device is used to lock the arc-shaped wooden barrel and the cover material, and includes a locking actuator, wherein the locking actuator includes a beam plate fixed to an external device or component, a pressing component installed on the beam plate, and a holding component located below the beam plate; The clamping component includes a fixed clamping block located directly below the beam plate and two movable clamping blocks located on both sides of the fixed clamping block. The two movable clamping blocks are hinged to the frame of the external frame and include a power cylinder for driving the two movable clamping blocks to rotate. The pressing component comprises a pressing cylinder and a pressing beam plate installed at the telescopic end thereof; Also included is a gripping component with guiding and clamping functions, the gripping component is used to grip and position the curved wooden barrel; The grabbing component comprises two detachable clamping seats, which are fixed on the lower pressure beam plate; the clamping seat has an opening on the lower side, outer inclined surfaces on both sides, a pressure strip at the bottom of the opening, and pneumatic clamping pieces on both sides; Add rolling supports that provide lateral movement and rotation at the arc-extending ends of the two movable holding blocks; The positioning device also includes a stretching and covering mechanism, which is used to flatten and stretch the cut cover material at one time; The stretching and covering mechanism comprises two hinged frames, each hinged frame has a telescopic gear at the far end, and two stretching cylinders, whose bodies are fixed under the hinged frames, and the telescopic parts are fixedly connected to the telescopic gear; The application method comprises the following steps: a. Start the two movable blocks to the set angle so that the curved barrel can be stably placed on the rolling support; b. The lower pressure beam plate moves downward under the drive of the lower pressure cylinder, and the two clamp seats respectively enter the side plates of the two frames of the arc-shaped wooden barrel until the pressure strips touch the frame side plates, and then the pneumatic clamps on both sides clamp the frame side plates on both sides, and the lower pressure cylinder drives it to rise, and the arc-shaped wooden barrel rises accordingly, and the two movable holding blocks return to the flattened position; c. The corresponding power source controls the two hinged frames to a flattened state and controls the two cover layer clamps to an open state; d. The cover material is laid, and the two ends enter the clamping range of the corresponding side cover layer clamping members, and the clamping cylinder is started, and the two cover layer clamping members clamp the corresponding side cover material ends; e. The stretching cylinders on both sides start stretching outwards at the same time to stretch the cover material flat; f. The downward pressure cylinder drives the downward pressure beam plate downward, placing and pressing the curved wooden barrel on the fixed holding block, and the corresponding power cylinder drives the two hinged frames to rotate around the curved wooden barrel until the curved wooden barrel is completely covered; g. The corresponding power cylinder pushes the two movable blocks to gradually press the curved barrel covered by the cover material from both sides, and the cover material is flatly wrapped with the foam material over a large area. The two cover layer clamps are loosened to reset the two hinged frames; h. The staff uses fixings such as staples to connect the cover material to the frame, and cuts off the excess material after completion; i. Finally, loosen the lower pressure beam and movable holding blocks, move the curved wooden barrel away, and complete the covering work.

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