A packaging box forming apparatus

Abstract

The application discloses a packaging box forming device and relates to the technical field of packaging box production; specifically comprising an operation table, a top of the operation table is fixed with a top plate through a supporting rod, a bottom of the top plate is connected with a lifting plate through a lifting driver, a bottom of the lifting plate is fixed with an upper die matched with an inner surface of a side wall of a packaging box, an outer wall of the operation table below the upper die is fixed with a lower die for limiting a bottom of the packaging box, and a bottom of the upper die is formed with a heating strip matched with a rib position of the packaging box, and a side wall of the lower die is provided with a notch. The upper die and the lower die are arranged, and process optimization is combined, so that the cooperation of the upper die and the lower die can realize semi-automatic bonding and forming of the side wall and the bottom surface of the packaging box, and various defects of manual glue coating and bonding in the prior art are solved.

Description

Technical Field

[0001] This invention relates to the field of packaging box production technology, and in particular to a packaging box forming apparatus. Background Technology

[0002] Paper packaging boxes are containers made of paper materials such as cardboard and paperboard, and are mainly used for product packaging, transportation protection, and brand display.

[0003] Cardboard boxes have the following advantages: Environmentally friendly and recyclable: Paper materials are easy to degrade and recycle, which aligns with the trend of green packaging.

[0004] Flexible customization: It can be customized according to the shape and size of the product, with good printing effect, which is conducive to brand communication.

[0005] Costs are controllable: raw materials are widely available, production processes are mature, and it is suitable for mass production. When producing thin-walled paper box packaging, the side walls and bottom surface are processed independently. During processing, inwardly extending ribs are formed at the bottom of the side wall, and then the ribs of the side wall are combined with the bottom surface.

[0006] In existing technologies, the side walls and bottom of packaging boxes are usually joined by manually applying glue and then pressing them together. This method is inefficient and results in poor consistency of the finished product.

[0007] Therefore, the present invention proposes a packaging box forming device. Summary of the Invention

[0008] This invention addresses the shortcomings of existing technologies by proposing a packaging box forming device that aims to achieve the combination of the side walls and bottom surface of thin-walled packaging boxes using mechanical and semi-automatic methods.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: A packaging box forming apparatus includes an operating table, a top plate fixed to the top of the operating table by a support rod, a lifting plate connected to the bottom of the top plate by a lifting driver, an upper mold that fits the inner surface of the side wall of the packaging box fixed to the bottom of the lifting plate, a lower mold for limiting the bottom of the packaging box fixed to the outer wall of the operating table below the upper mold, and a heating strip that matches the position of the ribs of the packaging box after the bottom of the upper mold is formed. The molding process of the plastic packaging box molding device includes the following steps: S1: A pre-processed plastic sheet that matches the contour of the bottom surface of the packaging box. The width of the plastic sheet covers the mating surface between the packaging box ribs and the bottom surface of the packaging box. S2: After fitting the plastic sheet to the bottom surface, insert it through the lower mold and then place it into the side wall of the packaging box; S3: Then, the lifting plate is lowered by the lifting driver, and pressure is applied to the side wall of the packaging box by the heating strip. At the same time, the heating strip heats up, so that the plastic sheet is hot-melted and bonded. S4: After bonding is completed, the lifting driver drives the lifting plate to rise, and the finished packaging box can be removed manually or by a robotic arm.

[0010] Preferably, the side wall of the lower mold has a notch.

[0011] Furthermore: the top outer wall of the lifting plate is fixed with a support platform by bolts, the inner side of the support platform is rotatably connected with a transition frame by a connecting shaft, and the top of the transition frame is slidably connected to the bottom of the top plate by a guide rod.

[0012] Based on the aforementioned scheme: the plastic packaging box forming device further includes a rotary driver for driving the connecting shaft to rotate.

[0013] A better embodiment of the aforementioned scheme is: the rotary actuator is a telescopic rod, the telescopic end of the telescopic rod is rotatably connected to a connecting rod, the other end of the connecting rod is rotatably connected to an eccentric frame, and the other end of the eccentric frame is fixed to the outer wall of the connecting shaft.

[0014] As a further embodiment of the present invention: a top block is movably installed on the inner wall of the lifting plate located at the upper mold.

[0015] Meanwhile, the transition frame is rotatably connected to a second connecting rod on one side of the material taking direction, and the other end of the second connecting rod is rotatably connected to the top outer wall of the top block.

[0016] As a preferred embodiment of the present invention: the lifting drive includes a lifting telescopic device one and a lifting telescopic device two. Both lifting telescopic devices one and two are fixed to the top outer wall of the top plate by bolts. The transition frame and the support platform are fixedly connected by a connecting shaft. The telescopic end of the lifting telescopic device one is rotatably connected to a connecting plate. The telescopic end of the lifting telescopic device two is rotatably connected to a connecting rod three. The other end of the connecting rod three is rotatably connected to the outer wall of the connecting plate. The connecting plate is fixed to the outer wall of the transition frame by bolts.

[0017] Meanwhile, the inner wall of the support platform is provided with a waist-shaped hole, and the transition frame is movably inserted into the inner wall of the waist-shaped hole through a connecting shaft, so that the transition frame can rotate relative to the support platform and move linearly.

[0018] As a preferred embodiment of the present invention: the lifting drive includes a lifting telescopic device one and a lifting telescopic device two. Both the lifting telescopic device one and the lifting telescopic device two are fixed to the outer wall of the top plate by bolts. The telescopic end of the lifting telescopic device one is rotatably connected to a connecting rod four, and the other end of the connecting rod four is rotatably connected to the top outer wall of the lifting plate. The telescopic end of the lifting telescopic device two is rotatably connected to the top side outer wall of the lifting plate.

[0019] The beneficial effects of this invention are as follows: 1. This invention, by setting up an upper mold, a lower mold, etc., and combining process optimization, can achieve semi-automatic bonding and forming of the side wall and bottom surface of the packaging box by using the cooperation of the upper mold and the lower mold, thereby solving the various defects of manual glue coating and bonding in the prior art.

[0020] 2. This invention optimizes the movement dimension of the lifting plate from lifting to both lifting and rotating. After the packaging box is formed, the rotational movement dimension of the lifting plate can be used to change the angle at which the packaging box is removed. This effectively reduces the material handling path, increases material handling efficiency and convenience. At the same time, the size design of the upper mold and the targeted design of the notch on the lower mold ensure that the formed packaging box fits on the outer wall of the upper mold, ensuring the reliability of material handling.

[0021] 3. The present invention, on the one hand, by setting up a lifting plate, can remove materials without applying a large clamping force, thus ensuring the reliability of material removal. On the other hand, combined with the rotatable design of the lifting plate that reduces the material removal path, and using the second connecting rod as the motion transmission medium, the automatic ejection and retraction of the top block can be achieved by utilizing the rotation of the lifting plate itself, thereby saving on power arrangement and power control logic design.

[0022] 4. In this invention, by setting the lifting drive as a combination of lifting telescopic device one and lifting telescopic device two, the lifting and rotating motion of the lifting plate can be comprehensively driven by whether the extension and retraction of the two are synchronized. Moreover, lifting telescopic device one and lifting telescopic device two are independently fixed, and their pipeline or wire connection is easier to arrange, thereby reducing the difficulty of using the equipment.

[0023] 5. This invention, based on the comprehensive driving principle of synchronous movement of lifting telescopic device one and lifting telescopic device two driving the lifting plate to rise and fall, and asynchronous movement of lifting telescopic device one and lifting telescopic device two driving the lifting plate to rotate, directly uses the lifting plate as a connecting medium, and sets the connection between the transition frame and the support platform to be both rotatable and movable. Thus, on the one hand, it can make the top block move synchronously with the rotation of the lifting plate, and on the other hand, it can also use the translational movement between the transition frame and the support platform to increase the movement of the top block, ensuring the reliability of the top material. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment 1 of the packaging box forming device proposed in this invention; Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the packaging box forming device proposed in this invention; Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the packaging box forming device proposed in this invention; Figure 4 This invention provides a packaging box forming apparatus. Figure 3 Enlarged structural diagram of section A; Figure 5 This is a schematic diagram of the connecting rod two structure in Embodiment 3 of the packaging box forming device proposed in this invention; Figure 6 This is a schematic diagram of the structure of Embodiment 4 of the packaging box forming device proposed in this invention; Figure 7 This invention provides a packaging box forming apparatus. Figure 6 Enlarged structural diagram of section B; Figure 8 This is a schematic diagram of the structure of embodiment 5 of the packaging box forming device proposed in this invention; Figure 9 This invention provides a packaging box forming apparatus. Figure 8 Enlarged structural diagram of section C.

[0025] In the diagram: 1. Operating table; 2. Upper mold; 3. Notch; 4. Lower mold; 5. Lifting driver; 6. Top plate; 7. Support rod; 8. Lifting plate; 9. Heating strip; 10. Top block; 11. Telescopic rod; 12. Connecting shaft; 13. Support platform; 14. Lifting telescopic device; 14a. Lifting telescopic device one; 14b. Lifting telescopic device two; 15. Rotary driver; 16. Transition frame; 17. Guide rod; 18. Connecting rod one; 19. Eccentric frame; 20. Connecting rod two; 21. Connecting rod three; 22. Connecting plate; 23. Connecting rod four; 24. Waist-shaped hole. Detailed Implementation

[0026] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] Example 1: A packaging box forming device, such as Figure 1 Figure 2As shown, the device includes an operating table 1. The top of the operating table 1 is fixed with a top plate 6 by a support rod 7. The bottom of the top plate 6 is connected to a lifting plate 8 by a lifting driver 5. The bottom of the lifting plate 8 is fixed with an upper mold 2 that fits with the inner surface of the side wall of the packaging box. The outer wall of the operating table 1 located below the upper mold 2 is fixed with a lower mold 4 for limiting the bottom of the packaging box. The bottom of the upper mold 2 is formed with a heating strip 9 that matches the position of the ribs of the packaging box.

[0029] The lifting drive 5 is a lifting telescopic device 14, and the telescopic end of the lifting telescopic device 14 is connected to the lifting plate 8.

[0030] The molding process of the plastic packaging box molding device includes the following steps: S1: A pre-processed plastic sheet that matches the contour of the bottom surface of the packaging box. The width of the plastic sheet covers the mating surface between the packaging box ribs and the bottom surface of the packaging box. S2: After fitting the plastic sheet to the bottom surface, insert it through the lower mold 4 limit and then place it into the side wall of the packaging box; S3: Then, the lifting driver 5 drives the lifting plate 8 to descend, and the heating strip 9 applies pressure to the side wall of the packaging box. At the same time, the heating strip 9 heats up, so that the plastic sheet is hot-melted and bonded. S4: After bonding is completed, the lifting driver 5 drives the lifting plate 8 to rise, and the finished packaging box can be removed manually or by a robotic arm.

[0031] In this embodiment, by setting up an upper mold 2, a lower mold 4, etc., and combining process optimization, the cooperation between the upper mold 2 and the lower mold 4 can realize the semi-automatic bonding and forming of the side wall and bottom of the packaging box, thereby solving the various defects of manual glue coating and bonding in the prior art.

[0032] Example 2: A packaging box forming device, such as Figure 2 , 3 As shown in Figure 4, in order to solve the efficiency problem, this embodiment makes the following improvements based on embodiment 1: the side wall of the lower mold 4 is provided with a notch 3. The notch 3 is located at a non-critical contour position, which will not affect the limiting function of the lower mold 4 on the bottom surface of the packaging box.

[0033] Furthermore, the outer contour of the upper mold 2 is slightly larger than the inner surface contour of the side wall of the packaging box, so that there is a certain friction between the upper mold 2 and the inner surface of the packaging box without deforming it.

[0034] The top outer wall of the lifting plate 8 is fixed with a support platform 13 by bolts. The inner side of the support platform 13 is rotatably connected to a transition frame 16 by a connecting shaft 12. The top of the transition frame 16 is slidably connected to the bottom of the top plate 6 by a guide rod 17.

[0035] Furthermore, the plastic packaging box forming device also includes a rotary driver 15 for driving the connecting shaft 12 to rotate.

[0036] In this embodiment, the specific type of the rotary actuator 15 is not limited. It can be directly driven by a rotary drive component such as an electric motor or motor, or it can take other forms. In this embodiment, the specific details are as follows: The rotary driver 15 is a telescopic rod 11. The telescopic end of the telescopic rod 11 is rotatably connected to a connecting rod 18. The other end of the connecting rod 18 is rotatably connected to an eccentric frame 19. The other end of the eccentric frame 19 is fixed to the outer wall of the connecting shaft 12.

[0037] In actual use, whether manual or robotic arm material handling is employed, the arm needs to be moved horizontally to below the lifting plate 8, then upward to grab the packaging box, then downward to separate the packaging box from the upper mold 2, and then moved horizontally. During this process, the arm's movement path is mostly straight and relatively long. This embodiment is based on this principle. After molding, some of the hot-melted plastic will cause the upper mold 2 to have a certain adhesive force with the packaging box. At the same time, the lower mold 4 has a notch 3, which reduces the contact area between the side wall of the packaging box and the inner wall of the lower mold 4, thereby reducing the contact force. In addition, the size of the upper mold 2 is slightly larger than the side wall, which will also generate friction. The combined effect of these three factors will cause the molded packaging box to fit on the outside of the upper mold 2. Then, the rotary driver 15 drives the connecting shaft 12 to rotate relative to the transition frame 16, which rotates the upper mold 2 to an inclined angle or a horizontal angle, such as 45-90 degrees. Then, the material is picked up manually or by a robotic arm.

[0038] This device optimizes the movement dimension of the lifting plate 8 from lifting to both lifting and rotating. After the packaging box is formed, the angle at which the packaging box is removed can be changed by the rotational movement dimension of the lifting plate 8. This effectively reduces the material handling path, increases material handling efficiency and convenience. At the same time, the size design of the upper mold 2 and the targeted design of the notch 3 on the lower mold 4 ensure that the formed packaging box fits on the outer wall of the upper mold 2, ensuring the reliability of material handling.

[0039] Example 3: A packaging box forming device, such as Figure 2 , 3 As shown in Figure 5, since the packaging box has a certain elastic deformation property, when the packaging box is gripped, a clamping force is applied to the packaging box. Since the packaging box is fitted onto the outer wall of the upper mold 2, this clamping force causes the packaging box to adhere tightly to the outer wall of the upper mold 2, increasing its adhesion and resulting in unsmooth material handling. Based on this problem, the targeted improvements made in this embodiment are as follows: The lifting plate 8 is movably mounted on the inner wall of the upper mold 2 with a top block 10. Before taking out the material, the lifting plate 8 can be pushed out by the telescopic rod, eccentric wheel and other structures, so that the packaging box can be pushed out from the upper part of the upper mold 2 by the lifting plate 8. Then, when taking out the material, the pushing-out part of the packaging box can be clamped and removed.

[0040] The transition frame 16 is rotatably connected to a connecting rod 20 on one side of the material picking direction, and the other end of the connecting rod 20 is rotatably connected to the top outer wall of the top block 10.

[0041] In this embodiment, before material removal, the lifting plate 8 can be pushed out using structures such as telescopic rods and eccentric wheels. The lifting plate 8 can then push the packaging box out from the upper part of the upper mold 2. When removing the material, a clamping force can be applied to the pushed-out part of the packaging box to remove it. In addition, if combined with the design scheme in embodiment 2, when the lifting plate 8 rotates relative to the transition frame 16, the top block 10 will rotate relative to the transition frame 16. The connecting action of the connecting rod 20 will drive the top block 10 to move and push out part of the packaging box.

[0042] This device, on the one hand, by setting up a lifting plate 8, can remove materials without applying a large clamping force, ensuring the reliability of material removal. On the other hand, combined with the rotatable design of the lifting plate 8 which reduces the material removal path, and using the connecting rod 20 as the motion transmission medium, the automatic ejection and retraction of the top block 10 can be achieved by the rotation of the lifting plate 8 itself, thereby saving on power layout and power control logic design.

[0043] Example 4: A packaging box forming apparatus, such as Figure 6 and 7 As shown, since the lifting plate 8 needs to both rotate and move up and down, the rotation drive component of the lifting plate 8 is in motion. This requires a specific arrangement of the drive source wiring to ensure safety without hindering the operation of the entire molding process, which places high demands on the design. Therefore, based on the above issues, this embodiment makes the following targeted design: The lifting drive 5 includes a first lifting telescopic device 14a and a second lifting telescopic device 14b. Both the first lifting telescopic device 14a and the second lifting telescopic device 14b are fixed to the top outer wall of the top plate 6 by bolts. The transition frame 16 and the support platform 13 are fixedly connected by a connecting shaft 12. The telescopic end of the first lifting telescopic device 14a is rotatably connected to a connecting plate 22, and the telescopic end of the second lifting telescopic device 14b is rotatably connected to a third connecting rod 21. The other end of the third connecting rod 21 is rotatably connected to the outer wall of the connecting plate 22. The connecting plate 22 is fixed to the outer wall of the transition frame 16 by bolts.

[0044] In this embodiment, when the first lifting telescopic device 14a and the second lifting telescopic device 14b extend and retract synchronously, they can drive the transition frame 16, support platform 13, and lifting plate 8 to rise and fall as a whole. When the first lifting telescopic device 14a and the second lifting telescopic device 14b extend and retract at different speeds, the connecting plate 22 will rotate due to the difference in their movements, thereby causing the lifting plate 8 to rotate.

[0045] In this embodiment, by setting the lifting drive 5 as a combination of lifting telescopic device 14a and lifting telescopic device 24b, the lifting and rotating motion of the lifting plate 8 can be comprehensively driven by whether the extension and retraction of the two are synchronized. Moreover, the lifting telescopic device 14a and lifting telescopic device 24b are independently fixed, and their pipeline or wire connection is easier to arrange, thereby reducing the difficulty of using the equipment.

[0046] Example 5: A packaging box forming apparatus, such as Figure 8 , Figure 9 As shown, although the arrangement of lifting telescopic device 14a and lifting telescopic device 14b in embodiment 4 achieves integrated lifting and rotation drive with a fixed drive source, it treats the transition frame 16 and the lifting plate 8 as a whole, which makes it impossible to achieve synchronous movement of the top block 10 in embodiment 3. Therefore, based on this, this embodiment is further optimized in a targeted manner, as follows: The inner wall of the support platform 13 is provided with a waist-shaped hole 24. The transition frame 16 is movably inserted into the inner wall of the waist-shaped hole 24 through the connecting shaft 12, so that the transition frame 16 can rotate relative to the support platform 13 and move linearly.

[0047] The lifting drive 5 includes a first lifting telescopic device 14a and a second lifting telescopic device 14b. Both the first lifting telescopic device 14a and the second lifting telescopic device 14b are fixed to the outer wall of the top plate 6 by bolts. The telescopic end of the first lifting telescopic device 14a is rotatably connected to a fourth connecting rod 23, and the other end of the fourth connecting rod 23 is rotatably connected to the top outer wall of the lifting plate 8. The telescopic end of the second lifting telescopic device 14b is rotatably connected to the top side outer wall of the lifting plate 8.

[0048] In this embodiment, based on the comprehensive driving mechanism that combines the synchronous movement of lifting telescopic device 14a and lifting telescopic device 24b to drive the lifting plate 8 to rise and fall, and the asynchronous movement of lifting telescopic device 14a and lifting telescopic device 24b to drive the lifting plate 8 to rotate, the lifting plate 8 is directly used as a connecting medium, and the connection between the transition frame 16 and the support platform 13 is set to be both rotatable and movable. This allows the top block 10 to move synchronously with the rotation of the lifting plate 8, and also increases the movement of the top block 10 by utilizing the translational movement between the transition frame 16 and the support platform 13, thus ensuring the reliability of the top material.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A packaging box forming apparatus, comprising an operating table (1), characterized in that, The top of the operating table (1) is fixed with a top plate (6) by a support rod (7), and the bottom of the top plate (6) is connected to a lifting plate (8) by a lifting driver (5). The bottom of the lifting plate (8) is fixed with an upper mold (2) that fits the inner surface of the side wall of the packaging box. The outer wall of the operating table (1) located below the upper mold (2) is fixed with a lower mold (4) for limiting the bottom of the packaging box. The bottom of the upper mold (2) is formed with a heating strip (9) that matches the position of the ribs of the packaging box. The molding process of the plastic packaging box molding device includes the following steps: S1: A pre-processed plastic sheet that matches the contour of the bottom surface of the packaging box. The width of the plastic sheet covers the mating surface between the packaging box ribs and the bottom surface of the packaging box. S2: After fitting the plastic sheet with the bottom surface, it is placed into the lower mold (4) for positioning, and then placed into the side wall of the packaging box; S3: Then, the lifting plate (8) is lowered by the lifting driver (5), and pressure is applied to the side wall of the packaging box by the heating strip (9). At the same time, the heating strip (9) heats up, so that the plastic sheet is hot melted and bonded. S4: After bonding is completed, the lifting driver (5) drives the lifting plate (8) to rise, and the molded packaging box can be removed manually or by a robotic arm.

2. The packaging box forming device according to claim 1, characterized in that, The lower mold (4) has a notch (3) on its side wall.

3. The packaging box forming device according to claim 1, characterized in that, The top outer wall of the lifting plate (8) is fixed with a support platform (13) by bolts. The inner side of the support platform (13) is rotatably connected to a transition frame (16) by a connecting shaft (12). The top of the transition frame (16) is slidably connected to the bottom of the top plate (6) by a guide rod (17).

4. The packaging box forming apparatus according to claim 3, characterized in that, The plastic packaging box forming device also includes a rotary driver (15) for driving the connecting shaft (12) to rotate.

5. A packaging box forming apparatus according to claim 4, characterized in that, The rotary driver (15) is a telescopic rod (11). The telescopic end of the telescopic rod (11) is rotatably connected to a connecting rod (18). The other end of the connecting rod (18) is rotatably connected to an eccentric frame (19). The other end of the eccentric frame (19) is fixed to the outer wall of the connecting shaft (12).

6. The packaging box forming apparatus according to claim 3, characterized in that, The lifting plate (8) is movably mounted with a top block (10) on the inner wall of the upper mold (2).

7. A packaging box forming apparatus according to claim 6, characterized in that, The transition frame (16) is rotatably connected to a second connecting rod (20) on one side of the material taking direction, and the other end of the second connecting rod (20) is rotatably connected to the top outer wall of the top block (10).

8. A packaging box forming apparatus according to claim 3, characterized in that, The lifting drive (5) includes a lifting telescopic device one (14a) and a lifting telescopic device two (14b). Both the lifting telescopic device one (14a) and the lifting telescopic device two (14b) are fixed to the top outer wall of the top plate (6) by bolts. The transition frame (16) and the support platform (13) are fixedly connected by a connecting shaft (12). The telescopic end of the lifting telescopic device one (14a) is rotatably connected to a connecting plate (22). The telescopic end of the lifting telescopic device two (14b) is rotatably connected to a connecting rod three (21). The other end of the connecting rod three (21) is rotatably connected to the outer wall of the connecting plate (22). The connecting plate (22) is fixed to the outer wall of the transition frame (16) by bolts.

9. A packaging box forming apparatus according to claim 3, characterized in that, The inner wall of the support platform (13) is provided with a waist-shaped hole (24). The transition frame (16) is movably inserted into the inner wall of the waist-shaped hole (24) through the connecting shaft (12), so that the transition frame (16) can rotate relative to the support platform (13) and move linearly.

10. A packaging box forming apparatus according to claim 9, characterized in that, The lifting drive (5) includes a lifting telescopic device one (14a) and a lifting telescopic device two (14b). Both the lifting telescopic device one (14a) and the lifting telescopic device two (14b) are fixed to the outer wall of the top plate (6) by bolts. The telescopic end of the lifting telescopic device one (14a) is rotatably connected to a connecting rod four (23), and the other end of the connecting rod four (23) is rotatably connected to the top outer wall of the lifting plate (8). The telescopic end of the lifting telescopic device two (14b) is rotatably connected to the top outer wall of the lifting plate (8).

Images