A Coated Glass In-warehouse Transportation Device and Its Usage Method

Abstract

The present invention relates to the technical field of glass transportation, and specifically to a coating glass warehousing transportation device and its usage method, including a base, and a support frame is fixedly arranged on the top of the base. For this coating glass warehousing transportation device and its usage method, the linear kinetic energy of the sliding seat is converted into the rotational kinetic energy of the rotating shaft through the engagement of the rotating shaft and the threaded groove of the sliding seat, and the energy is stored stage by stage through the elastic deformation of the first energy storage member. When the glass touches the bottom, the elastic potential energy of the energy storage member is released to form a reverse buffering force to offset the inertial impact of the glass, and the anti-impact ability of the coating layer is increased by more than 40%. When the sliding seat slides down along the inclined frame, the device uses the self-weight of the glass to drive energy storage, reducing the external power demand, and the energy consumption is reduced by about 30%. At the same time, the vibration transmission caused by the frequent start and stop of the mechanical brake is avoided. The rubber pad of the base and the airbag of the support plate form a two-stage buffering interface, and combined with the dynamic damping characteristics of the energy storage member, it ensures that the contact pressure gradient is gentle when the glass touches the bottom, and the stress concentration area on the coating surface is reduced by 60%.

Description

Technical Field

[0001] The present invention relates to the technical field of glass transportation, and specifically to a transportation device for coated glass during warehousing and its usage method. Background Art

[0002] Coated glass is a type of glass whose performance is changed by coating a thin film on its surface; this thin film can be used to improve the optical performance, heat insulation performance, sound insulation performance, and safety performance of the glass, etc.; common coated glasses include reflective film glass, low-emissivity glass, laminated glass, etc.; these coatings can enhance the functions of the glass, such as reducing indoor temperature fluctuations, reducing indoor energy consumption, and reducing the penetration of ultraviolet and infrared rays.

[0003] When transporting coated glass into the warehouse, a glass transportation rack is often used, that is, stacking the coated glass on the glass transportation rack.

[0004] However, traditional equipment relies on a rigid shock-absorbing structure or a single spring buffer, and cannot dynamically store and release energy, resulting in the inertial impact at the moment when the coated glass touches the bottom being directly transmitted to the film layer, causing microcracks or film layer peeling, and manual fixation is required after the coated glass is placed.

[0005] In view of this, we propose a transportation device for coated glass during warehousing and its usage method. Summary of the Invention

[0006] The purpose of the present invention is to provide a transportation device for coated glass during warehousing and its usage method to solve the problems in the above background art that traditional equipment relies on a rigid shock-absorbing structure or a single spring buffer, cannot dynamically store and release energy, resulting in the inertial impact at the moment when the coated glass touches the bottom being directly transmitted to the film layer, causing microcracks or film layer peeling, and manual fixation is required after the coated glass is placed. To achieve the above purpose, the present invention provides the following technical solution: A transportation device for coated glass during warehousing, including a base, a support frame is fixedly arranged on the top of the base, and an inclined frame for receiving the coated glass is fixedly connected between the support frame and the base. Sliding seats are slidably connected to both sides of the inclined frame, and a support plate cooperating with the inclined frame is arranged on the front side of the sliding seat. Two hinge seats are fixedly arranged on both sides of the inclined frame, a rotating shaft is rotatably connected between the two hinge seats, and a driven thread with a spiral structure is arranged on the rotating shaft. A shaft hole with a threaded groove cooperating with the rotating shaft and the driven thread is formed on the surface of the sliding seat.

[0007] A first energy storage member is arranged between the lower end of the rotating shaft and the lower hinge seat.

[0008] Preferably, a circular groove communicating with the shaft hole is formed inside the sliding seat, a vertical shaft is arranged in the circular groove, a gear is movably arranged on the vertical shaft, and a tooth pattern meshing with the gear is formed on the surface of the driven thread along a spiral path.

[0009] A second energy storage member is provided between the gear and the vertical shaft.

[0010] Preferably, a sliding sleeve is slidably connected to the surface of the vertical shaft. The second energy storage member is disposed between the sliding sleeve and the gear. A top push pin cooperating with the gear is fixedly provided on the lower side of the inclined frame. A lower hole communicating with the circular groove and allowing the top push pin to penetrate is formed at the bottom of the sliding seat.

[0011] A bottom push pin cooperating with the gear is fixedly provided on the upper side of the inclined frame. An upper hole communicating with the circular groove and allowing the bottom push pin to penetrate is formed at the top of the sliding seat.

[0012] A through groove communicating with the circular groove is formed on the side surface of the sliding seat. A sliding frame is slidably connected in the through groove. A tension spring is provided between the sliding frame and the sliding seat. A tooth surface cooperating with the upwardly moving gear is provided on the upper side of the side surface of the sliding frame. The front end of the sliding frame is fixedly connected to a support plate.

[0013] Preferably, both the first energy storage member and the second energy storage member are spiral springs.

[0014] Preferably, both the first energy storage member and the second energy storage member are torsion springs.

[0015] Preferably, a counterweight cooperating with the support plate is fixedly connected to the tail end of the sliding frame by bolts.

[0016] Preferably, air bags contacting the coated glass are fixedly provided on the side surfaces of the front and rear sides of the support plate.

[0017] A method for using a coated glass storage and transportation device includes the following steps:

[0018] S1. After an external conveying mechanism pushes the coated glass onto the surface of the support plate, it drives the sliding seat to slide down along the inclined frame. The rotating shaft rotates under the action of screw transmission and compresses the first energy storage member, and accumulates elastic potential energy through the first energy storage member, so as to realize dynamic buffering when the coated glass is placed by using the energy storage mechanism.

[0019] S2. During the sliding down process of the sliding seat, the gear is always engaged with the driven tooth pattern. The tooth pattern is used to push the gear to rotate and compress the second energy storage member, and accumulate elastic potential energy through the second energy storage member, so as to form a double energy storage mechanism through the secondary meshing transmission of the gear and the spiral tooth pattern.

[0020] S3. When the support plate moves down to the bottom, the top push pin inserts into the sliding seat, pushes the gear upward, so that the gear disengages from the driven tooth pattern and turns to engage with the tooth surface. The gear in the energy storage state triggers the sliding frame to stretch the tension spring and move forward, so that the support plate leaves the glass. Then, the resilience of the first energy storage member drives the sliding seat to slide up along the inclined frame to reset until the bottom push pin pushes the gear to move down and reset. At this time, the tension spring pulls the sliding frame and the support plate back to press the glass.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] In the present invention, elastic potential energy is accumulated by the first energy storage member, and the energy storage mechanism is used to achieve dynamic buffering of inertial impact during the placement of coated glass, and the following effects are achieved:

[0023] Active reduction of screw drive: (the rotating shaft meshes with the threaded groove of the sliding seat) converts the linear kinetic energy of the sliding seat into the rotational kinetic energy of the rotating shaft, and realizes the stage-by-stage energy storage through the elastic deformation of the first energy storage member (coil spring / torsion spring). When the glass touches the bottom, the elastic potential energy of the energy storage member is released to form a reverse buffering force, offsetting the inertial impact of the glass, and the anti-impact ability of the coating layer is increased by more than 40%.

[0024] Efficient conversion of gravitational potential energy: When the sliding seat slides down along the inclined frame, the device uses the self-weight of the glass to drive energy storage, reducing the external power demand, reducing the energy consumption by about 30%, and at the same time avoiding the vibration transmission caused by the frequent start and stop of the mechanical brake.

[0025] Synchronous voltage stabilization of the contact surface: The rubber pad of the base and the airbag of the support plate form a two-stage buffering interface, combined with the dynamic damping characteristics of the energy storage member, to ensure that the contact pressure gradient is gentle when the glass touches the bottom, and the stress concentration area on the coating surface is reduced by 60%.

[0026] In the present invention, through the secondary meshing transmission of the gear and the spiral tooth pattern, a double energy storage mechanism is formed, and the following effects are achieved:

[0027] Redundant design of energy storage: The secondary meshing of the gear and the driven pattern transmits the rotational kinetic energy of the rotating shaft to the second energy storage member, forming a master (first energy storage member)-slave (second energy storage member) double energy storage system:

[0028] The first energy storage member stores macroscopic motion energy, and the second energy storage member stores the microscopic meshing vibration energy of the gear, avoiding energy coupling interference;

[0029] When the sliding seat moves downward, the two-stage energy storage is charged synchronously, and when moving upward, it is released in stages, and the motion stability is improved by 50% (the measured amplitude ≤ 0.2 mm).

[0030] Transmission accuracy compensation mechanism: The gear meshing forcibly restricts the rotation angle of the rotating shaft, eliminating the backlash error existing in the single-stage screw groove transmission, and the displacement positioning accuracy of the sliding seat reaches ±0.5 mm, meeting the stacking tolerance requirements of high-precision coated glass.

[0031] Fault isolation guarantee; when the first energy storage member fails, the second energy storage member can still maintain the gear meshing state, preventing the sliding seat from sliding out of control, and the system safety level reaches SIL2.

[0032] In the present invention, the up and down, front and back movements of the support plate are respectively controlled by the first energy storage member and the second energy storage member, and the following effects are achieved:

[0033] Clamping - releasing intelligent switching: Pushing the ejector pin triggers the gear to disengage from the driven thread, enabling the carriage to complete: Release stage: The second energy storage component drives the carriage forward, stretching the tension spring for energy storage, and the support plate disengages from the glass; Reset stage: The first energy storage component pushes the sliding seat upward, resetting the gear with the lower ejector pin, and the tension spring retracts to pull the carriage to clamp the glass. The entire process requires no manual intervention.

[0034] Gravity - elastic self - balance: The counterweight and the tension spring form a couple to balance, offsetting the overturning moment when the support plate moves forward. The sliding resistance of the carriage is reduced by 70%, ensuring uniform pressing force.

[0035] Non - destructive clamping closed - loop control: The airbag generates an adaptive deformation during the pressing stage. Description of the Drawings

[0036] Figure 1 It is a three - dimensional structure schematic diagram of the present invention;

[0037] Figure 2 It is a three - dimensional structure schematic diagram of the inclined frame of the present invention;

[0038] Figure 3 For the present invention Figure 2 An enlarged view of part A in the present invention;

[0039] Figure 4 For the present invention Figure 2 An enlarged view of part B in the present invention;

[0040] Figure 5 It is a structure schematic diagram of the rotating shaft and the driven thread of the present invention;

[0041] Figure 6 It is an exploded view of the sliding seat and the carriage of the present invention;

[0042] Figure 7 It is a three - dimensional structural cross - section of the sliding seat of the present invention Figure 1 ;

[0043] Figure 8 It is a three - dimensional structural cross - section of the sliding seat of the present invention Figure 2 ;

[0044] Figure 9 It is a structure schematic diagram of the gear, the vertical shaft, the sliding sleeve, and the second energy storage component of the present invention.

[0045] In the figure: 1. Base; 2. Support frame; 3. Inclined frame; 4. Sliding seat; 5. Support plate; 6. Hinge seat; 7. Rotating shaft; 8. Driven thread; 9. Shaft hole; 10. First energy storage component; 11. Circular groove; 12. Vertical shaft; 13. Gear; 14. Tooth thread; 15. Second energy storage component; 16. Sliding sleeve; 17. Upper ejector pin; 18. Lower hole; 19. Lower ejector pin; 20. Upper hole; 21. Through groove; 22. Carriage; 23. Tension spring; 24. Tooth surface. Detailed implementation mode

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0047] Please refer to Figures 1 to 9 , the present invention provides a technical solution: a coating glass warehousing and transportation device, including a base 1, a rubber pad for receiving the coating glass is arranged on the base 1, so that after the pallet 5 moves down to the bottom, the coating glass can be separated from the pallet 5 and transferred to the base 1. A support frame 2 is fixedly arranged on the top of the base 1, and an inclined frame 3 for receiving the coating glass is fixedly connected between the support frame 2 and the base 1. Slide seats 4 are slidably connected to both sides of the inclined frame 3, and a pallet 5 matching with the inclined frame 3 is arranged on the front side of the slide seat 4. Two hinge seats 6 are fixedly arranged on both sides of the inclined frame 3, a rotating shaft 7 is rotatably connected between the two hinge seats 6, and a driven thread 8 with a spiral structure is arranged on the rotating shaft 7. A shaft hole 9 with a threaded groove matching with the rotating shaft 7 and the driven thread 8 is opened on the surface of the slide seat 4.

[0048] A first energy storage member 10 is arranged between the lower end of the rotating shaft 7 and the lower hinge seat 6. The two slide seats 4 are engaged with the spiral driven thread 8 of the rotating shaft 7 through the threaded groove in the shaft hole 9. When the slide seat 4 slides along the inclined frame 3 under an external driving force, the rotating shaft 7 rotates with the displacement of the slide seat 4 and stores elastic potential energy through the first energy storage member 10.

[0049] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 shown, a circular groove 11 communicating with the shaft hole 9 is opened inside the slide seat 4, a vertical shaft 12 is arranged in the circular groove 11, and a gear 13 is movably arranged on the vertical shaft 12. Tooth patterns 14 meshing with the gear 13 are opened on the surface of the driven thread 8 along a spiral path.

[0050] A second energy storage member 15 is arranged between the gear 13 and the vertical shaft 12. During the downward sliding of the slide seat 4, the gear 13 is always engaged with the driven thread 8, and the tooth pattern 14 is used to push the gear 13 to rotate and compress the second energy storage member 15, and elastic potential energy is stored through the second energy storage member 15.

[0051] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9As shown, a sliding sleeve 16 is slidably connected to the surface of the vertical shaft 12. The second energy storage member 15 is disposed between the sliding sleeve 16 and the gear 13. A push pin 17 that cooperates with the gear 13 is fixedly provided on the lower side of the inclined frame 3. A lower hole 18 that communicates with the circular groove 11 and allows the push pin 17 to pass through is formed at the bottom of the sliding seat 4. When the support plate 5 moves down to the bottom, the push pin 17 is inserted into the sliding seat 4, pushing the gear 13 upward, causing the gear 13 to disengage from the driven thread 8 and engage with the tooth surface 24. The gear 13 in the energy storage state triggers the sliding frame 22 to stretch the tension spring 23 and move forward, causing the support plate 5 to leave the glass.

[0052] A push pin 19 that cooperates with the gear 13 is fixedly provided on the upper side of the inclined frame 3. An upper hole 20 that communicates with the circular groove 11 and allows the push pin 19 to pass through is formed at the top of the sliding seat 4.

[0053] A through groove 21 that communicates with the circular groove 11 is formed on the side surface of the sliding seat 4. A sliding frame 22 is slidably connected in the through groove 21. A tension spring 23 is disposed between the sliding frame 22 and the sliding seat 4. A tooth surface 24 that cooperates with the upward moving gear 13 is provided on the upper side of the side surface of the sliding frame 22. The front end of the sliding frame 22 is fixedly connected to the support plate 5. The resilience of the first energy storage member 10 drives the sliding seat 4 to slide upward along the inclined frame 3 to reset until the push pin 19 pushes the gear 13 to move downward to reset. At this time, the tension spring 23 pulls the sliding frame 22 and the support plate 5 to move back to press against the glass.

[0054] In this embodiment, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 shown, both the first energy storage member 10 and the second energy storage member 15 are configured as coil springs. The spiral structure of the coil spring can achieve high-density elastic potential energy storage, ensuring a stable and controllable rotational energy storage process of the rotating shaft 7 when the sliding seat 4 moves. Moreover, the symmetric force-bearing characteristic of the coil spring can reduce the deformation loss during long-term reciprocating motion, extend the service life of the energy storage member, reduce the equipment maintenance frequency. The coil spring structure has a high degree of standardization, is easy to integrate with components such as the rotating shaft 7 and the gear 13, and reduces the equipment assembly complexity.

[0055] In this embodiment, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figures 5 to 9 shown, both the first energy storage member 10 and the second energy storage member 15 are configured as torsion springs. The torsion spring occupies a small space and is suitable for the elastic energy storage requirements in narrow areas such as the inclined frame 3 and the sliding seat 4, improving the equipment compactness. Moreover, the torsional characteristic of the torsion spring can quickly respond to the rotational movement when the sliding seat 4 displaces, realizing the instant switching of energy storage - energy release, improving the coating glass unloading efficiency. The production process of the torsion spring is mature, and the batch purchase cost is low, which is beneficial to reducing the overall manufacturing cost of the equipment.

[0056] In this embodiment, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 , a counterweight that cooperates with the pallet 5 is fixedly connected to the tail end of the carriage 22 by bolts. By adding a counterweight at the tail end of the carriage 22, the weight offset of the pallet 5 and the coated glass can be offset, preventing the carriage 22 from jamming or shaking due to the center of gravity shifting, ensuring the smooth sliding of the slider 4 along the inclined frame 3, and the balancing effect of the counterweight reduces the stress concentration at the connection between the carriage 22 and the slider 4, extending the service life of key components such as the slide rail and the gear 13. The counterweight can be flexibly adjusted in terms of the installation position or weight to adapt to the transportation requirements of coated glass of different sizes, enhancing the versatility of the equipment.

[0057] In this embodiment, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 , airbags that come into contact with the coated glass are fixedly arranged on the front and rear side surfaces of the pallet 5. The airbags on both sides of the pallet 5 are in flexible contact with the coated glass, avoiding scratches or collision damages caused by traditional rigid clamping, especially suitable for the storage protection of high-precision coated glass, and the airbags can adaptively deform under pressure to the edges of glass with different thicknesses, ensuring the clamping stability, while reducing manual adjustment operations. The elastic characteristics of the airbags can absorb the vibration energy during the movement of the pallet 5, reducing the operating noise of the equipment and improving the working environment.

[0058] A method for using a coated glass storage and transportation device includes the following steps:

[0059] S1. After the external conveying mechanism pushes the coated glass onto the surface of the pallet 5, it drives the slider 4 to slide down along the inclined frame 3. The rotating shaft 7 rotates under the action of screw drive and compresses the first energy storage member 10, and accumulates elastic potential energy through the first energy storage member 10, thereby using the energy storage mechanism to achieve dynamic buffering when placing the coated glass.

[0060] S2. During the downward sliding of the slider 4, the gear 13 is always engaged with the driven thread 8, and the tooth thread 14 is used to push the gear 13 to rotate and compress the second energy storage member 15, and accumulates elastic potential energy through the second energy storage member 15, thereby forming a dual energy storage mechanism through the secondary meshing transmission between the gear 13 and the spiral tooth thread 14.

[0061] S3. When the pallet 5 moves down to the bottom, the upward push ejector pin 17 is inserted into the slide base 4, pushing the gear 13 upward, causing the gear 13 to disengage from the driven thread 8 and engage with the tooth surface 24. The gear 13 in the energy storage state triggers the carriage 22 to stretch the tension spring 23 and move forward, causing the pallet 5 to leave the glass. Then, the resilience of the first energy storage member 10 drives the slide base 4 to slide upward and reset along the inclined frame 3 until the downward push ejector pin 19 pushes the gear 13 downward to reset. At this time, the tension spring 23 pulls the carriage 22 and the pallet 5 back to press against the glass.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A coating glass warehousing and transportation device, comprising a base (1), characterized in that: A support frame (2) is fixedly arranged on the top of the base (1), and an inclined frame (3) for receiving coated glass is fixedly connected between the support frame (2) and the base (1). Slide seats (4) are slidably connected to both sides of the inclined frame (3), and a support plate (5) matching with the inclined frame (3) is arranged on the front side of the slide seat (4). Two hinge seats (6) are fixedly arranged on both sides of the inclined frame (3), a rotating shaft (7) is rotatably connected between the two hinge seats (6), and a driven thread (8) with a spiral structure is arranged on the rotating shaft (7). A shaft hole (9) with a threaded groove matching with the rotating shaft (7) and the driven thread (8) is formed on the surface of the slide seat (4); A first energy storage member (10) is arranged between the lower end of the rotating shaft (7) and the lower hinge seat (6); A circular groove (11) communicating with the shaft hole (9) is formed inside the slide seat (4), a vertical shaft (12) is arranged in the circular groove (11), a gear (13) is movably arranged on the vertical shaft (12), and tooth threads (14) meshing with the gear (13) are arranged on the surface of the driven thread (8) along a spiral path; A second energy storage member (15) is arranged between the gear (13) and the vertical shaft (12); A sliding sleeve (16) is slidably connected to the surface of the vertical shaft (12), the second energy storage member (15) is arranged between the sliding sleeve (16) and the gear (13), an upward push pin (17) matching with the gear (13) is fixedly arranged on the lower side of the inclined frame (3), and a lower hole (18) communicating with the circular groove (11) and allowing the upward push pin (17) to penetrate is formed at the bottom of the slide seat (4); A downward push pin (19) matching with the gear (13) is fixedly arranged on the upper side of the inclined frame (3), and an upper hole (20) communicating with the circular groove (11) and allowing the downward push pin (19) to penetrate is formed at the top of the slide seat (4); A through groove (21) communicating with the circular groove (11) is formed on the side surface of the slide seat (4), a slide frame (22) is slidably connected in the through groove (21), a tension spring (23) is arranged between the slide frame (22) and the slide seat (4), a tooth surface (24) matching with the upward moving gear (13) is arranged on the upper side of the side surface of the slide frame (22), and the front end of the slide frame (22) is fixedly connected with the support plate (5).

2. The coating glass warehousing and transportation equipment according to claim 1, characterized in that: Both the first energy storage member (10) and the second energy storage member (15) are spiral springs.

3. The coating glass storage and transportation equipment according to claim 2, wherein: Both the first energy storage member (10) and the second energy storage member (15) are torsion springs.

4. The coating glass warehousing and transportation equipment according to claim 3, characterized in that: A counterweight block matching with the support plate (5) is fixedly connected to the tail end of the slide frame (22) through a bolt.

5. The coating glass warehousing and transportation equipment according to claim 4, characterized in that: Air bags contacting the coated glass are fixedly arranged on the side surfaces of the front and rear sides of the support plate (5).

6. A method for using an in-warehouse transportation device for coated glass, which uses an in-warehouse transportation device for coated glass as described in claim 5, characterized in that, It includes the following steps: S1. After an external conveying mechanism pushes the coated glass onto the surface of the support plate (5), it drives the slide seat (4) to slide down along the inclined frame (3). The rotating shaft (7) rotates under the action of spiral transmission and compresses the first energy storage member (10), and accumulates elastic potential energy through the first energy storage member (10), so as to realize dynamic buffering during the placement of the coated glass by using the energy storage mechanism; S2. During the downward movement of the sliding seat (4), the gear (13) is always engaged with the driven thread (8). The tooth thread (14) is used to push the gear (13) to rotate and compress the second energy storage member (15), and the elastic potential energy is stored through the second energy storage member (15). In this way, through the secondary meshing transmission of the gear (13) and the helical tooth thread (14), a double energy storage mechanism is formed. S3. When the support plate (5) moves down to the bottom, the upward push ejector pin (17) is inserted into the sliding seat (4) to push the gear (13) upward, so that the gear (13) disengages from the driven thread (8). The upwardly moved gear (13) meshes with the tooth surface (24). The gear (13) in the energy storage state triggers the slide carriage (22) to stretch the tension spring (23) to move forward, so that the support plate (5) leaves the glass. Then, the resilience of the first energy storage member (10) drives the sliding seat (4) to slide upward and reset along the inclined frame (3) until the downward push ejector pin (19) pushes the gear (13) to move downward and reset. At this time, the tension spring (23) pulls the slide carriage (22) and the support plate (5) to move back to press the glass.

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