Leak-proof automatic splicing system and splicing method for concrete formwork

The design of the slide and push block driven by the mounting mechanism and threaded rod solves the problem of gaps caused by loose fixation of the concrete formwork, achieves the fastening and sealing of the formwork, avoids slurry leakage, and simplifies operation.

CN116791889BActive Publication Date: 2025-10-10蔡月星
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Patent Information

Application Number
CN202211434506.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-11-16
Publication Date
2025-10-10
Estimated Expiration
2042-11-16

AI Technical Summary

Technical Problem

During use, existing concrete formwork is not firmly fixed, resulting in gaps, causing concrete slurry to flow out and affecting construction.

Method used

A leak-proof automatic splicing system for concrete formwork is adopted, which drives a slide and a push block through an installation mechanism and a threaded rod, squeezes a connecting rod and a mounting frame, and realizes the fastening and sealing of the spliced ​​formwork.

Benefits of technology

It improves the sealing of the spliced ​​formwork, simplifies the installation and disassembly process of the formwork, and avoids slurry leakage during the pouring process.

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Abstract

The application discloses a concrete formwork leak-proof automatic splicing system, which comprises a mounting mechanism, a splicing formwork movably mounted on the surface of the mounting mechanism, and the mounting mechanism comprises mounting columns and a plurality of mounting racks, mounting grooves one are formed in the four sides of the outer wall of the mounting column, two clamping grooves one are symmetrically formed in the inner wall of each mounting groove one, clamping plates one are fixedly arranged on the inner wall of each mounting groove one, an inner cavity is formed in the mounting column, and a threaded rod is threadedly connected to the top of the mounting column. The threaded rod is driven to rotate by rotating the rotating wheel, the threaded rod is screwed into the inner part of the mounting column and drives the sliding seat and the push block to move downwards, at this time, the clamping plates one extrude the clamping plates two in the connecting plates, the clamping plates two are clamped into the clamping grooves one, the mounting racks extrude the surfaces of the splicing formwork through the sealing plates, and thus the splicing formwork can be fixed and the sealing between the splicing formwork and the mounting column 11 can be further improved.
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Description

Technical Field

[0001] The present invention relates to the field of concrete formwork, and more particularly to a leak-proof automatic splicing system and a splicing method for concrete formwork. Background Art

[0002] Concrete formwork refers to the formwork for forming newly poured concrete and a complete structural system that supports the formwork.

[0003] During the use of existing concrete formwork, after pouring concrete slurry into the assembled concrete formwork, gaps are generated due to the loose fixation between the concrete formwork, causing the poured concrete slurry to flow out of the gaps, causing a certain impact on construction. To this end, we propose a leak-proof automated splicing system and splicing method for concrete formwork. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] The object of the present invention is to provide a leak-proof automated splicing system and method for concrete formwork to solve the problems raised in the above-mentioned background technology.

[0006] 2. Technical solution

[0007] A leak-proof automatic splicing system for concrete formwork, including a mounting mechanism, a splicing formwork movably mounted on the surface of the mounting mechanism, the mounting mechanism including a mounting column and a plurality of mounting brackets, the mounting column having the same width as the splicing formwork, a mounting groove being respectively provided on four sides of an outer wall of the mounting column, a plurality of the inner walls of the mounting grooves being symmetrically structured and having two card slots being provided, a plurality of the inner walls of the mounting grooves being respectively fixed with a card plate, an inner cavity being provided inside the mounting column, a threaded rod being threadedly connected to the top of the mounting column, a rotating wheel being fixed to the top of the threaded rod, the bottom of the threaded rod passing through the mounting column and extending into the interior thereof, a plurality of slides being rotatably connected to the outer wall of the threaded rod, a plurality of push blocks being respectively fixed at the bottom of the slides, and the push blocks being sleeved on the surface of the threaded rod.

[0008] The inner wall of the inner cavity is slidably connected to a plurality of groups of connecting rods 1, the outer ends of the plurality of groups of connecting rods 1 extend into the interior of the mounting groove 1 and are slidably connected thereto, the circumferential outer walls of the plurality of groups of connecting rods 1 are respectively sleeved with springs 1, the ends of the plurality of groups of connecting rods 1 are respectively in sliding contact with the push block and the sliding seat, the inner wall of the inner cavity is slidably connected to a plurality of connecting rods 2, the two ends of the plurality of groups of connecting rods respectively pass through the mounting posts and extend to the outside thereof, the circumferential outer walls of the plurality of groups of connecting rods 2 are respectively sleeved with springs 2, the two ends of the plurality of groups of connecting rods are respectively connected and fixed with the push block and the sliding seat, a plurality of the mounting brackets are respectively in contact with the mounting posts, the outer walls of the plurality of mounting brackets are slidably connected with mounting plates, the mounting brackets are snap-fitted with the mounting plates, and the outer walls of the plurality of mounting plates are respectively fixed with sealing plates;

[0009] Preferably, the side of the splicing template is symmetrically provided with two connecting plates, the splicing template and the two connecting plates form a card slot three in combination, the card plate one is matched with the card slot three, two sliding grooves are arranged on the inner wall of the connecting plate, a sliding rod is arranged on the inner wall of the sliding groove, a spring three is arranged on the circumferential outer wall of the sliding rod, a sliding block is slidably connected to the circumferential outer wall of the sliding rod, a plurality of card plate twos are slidably connected to the inner wall of the connecting plate respectively, and the two ends of the card plate two are connected and fixed with the sliding block respectively.

[0010] Preferably, a mounting groove two is arranged on the surface of each card plate one in contact with the mounting column, and the outer end of the connecting rod one is connected and fixed with the inner wall of the mounting groove two.

[0011] Preferably, one end of the spring one is connected and fixed with the inner wall of the mounting groove one, and the other end of the spring one is connected and fixed with the card plate one.

[0012] Preferably, a mounting groove three is arranged on the side of each mounting frame close to the mounting column, and the outer end of the connecting rod two is connected and fixed with the inner wall of the mounting groove three.

[0013] Preferably, the number of the connecting rod one and the connecting rod two in each group is four, and the connecting rod one and the connecting rod two in multiple groups are arranged at equal intervals.

[0014] Preferably, one end of the spring two is connected and fixed with the outer wall of the mounting column, and the other end of the spring two is connected and fixed with the mounting frame.

[0015] Preferably, two card slots two are arranged on the surface of each mounting frame respectively, and the two card slots two are arranged on the two right angle surfaces of the mounting frame respectively, and the mounting frame is matched with the mounting plate through the card slot two.

[0016] Preferably, one end of the spring three is connected and fixed with the inner wall of the sliding groove, and the other end of the spring three is connected and fixed with the sliding block.

[0017] A splicing method of a leakage-proof automatic splicing system of a concrete formwork includes the following steps:

[0018] S1, by inserting two connecting plates on a plurality of splicing templates into mounting grooves one on mounting columns respectively, and inserting card plates one in the mounting grooves one into card slots three.

[0019] S2. The threaded rod is driven to rotate by rotating the rotating wheel. The threaded rod is screwed into the inside of the mounting column and drives the slide and the push block to move downward. At this time, the push block squeezes the connecting rod 1 and the connecting rod 2, causing the connecting rod 1 and the connecting rod 2 to slide toward the outside of the mounting column and push the clamping plate 1 and the mounting frame to move respectively.

[0020] S3. The second card plate in the connecting plate is squeezed by the pair of card plates so that the second card plate is inserted into the first card slot. When the mounting frame moves, the sealing plate on the outside squeezes the surface of the splicing template.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] 1. By rotating the rotating wheel to drive the threaded rod to rotate, the threaded rod is screwed into the inside of the mounting column and drives the slide and the push block to move downward. At this time, the second card plate in the connecting plate is squeezed by the pair of card plates, so that the second card plate is clamped into the inside of the card slot 1. The mounting frame drives the sealing plate to squeeze the surface of the splicing template, thereby fixing the splicing template and further improving the sealing between the splicing template and the mounting column 11.

[0024] 2. By rotating the rotating wheel, the threaded rod rotates, and the threaded rod screws into the inside of the installation column and drives multiple slides and push blocks to move downward at the same time. At this time, the push block squeezes multiple connecting rods 1 and multiple connecting rods 2 at the same time. This design makes it easier for operators to install and disassemble multiple splicing templates at the same time.

[0025] 3. Push the mounting plate upward to remove it from the second card slot. When the sealing effect of the sealing plate weakens, the mounting plate and the sealing plate can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 For the present invention Figure 1 Schematic diagram of the local structure in;

[0028] Figure 3 It is a schematic diagram of the overall structure of the installation mechanism of the present invention;

[0029] Figure 4 For the present invention Figure 2 Schematic diagram of the local structure in;

[0030] Figure 5 This is a schematic diagram of the internal structure of the mounting column of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the installation column of the present invention;

[0032] Figure 7 It is a schematic diagram of the local split structure of the application;

[0033] Figure 8 It is a schematic diagram of the local structure of the splicing template of the application;

[0034] Figure 9 It is a schematic diagram of the installation structure of the second clamping plate of the application.

[0035] Explanation of the figure: 1, mounting mechanism; 11, mounting column; 12, mounting groove one; 13, clamping groove one; 14, clamping plate one; 15, mounting groove two; 16, inner cavity; 17, threaded rod; 18, rotating wheel; 19, push block; 20, sliding seat; 21, connecting rod one; 22, spring one; 23, connecting rod two; 24, spring two; 25, mounting bracket; 26, mounting groove three; 27, clamping groove two; 28, mounting plate; 29, sealing plate; 2, splicing template; 201, connecting plate; 202, clamping groove three; 203, sliding groove; 204, sliding rod; 205, sliding block; 206, spring three; 207, second clamping plate. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0037] Please refer to Figures 1-9 The application provides a technical solution:

[0038] The application provides a concrete formwork leak-proof automatic splicing system, which comprises a mounting mechanism 1, wherein the mounting mechanism 1 is provided with a splicing template 2 movably mounted on the surface of the mounting mechanism 1, and the mounting mechanism 1 comprises a mounting column 11 and a plurality of mounting brackets 25; the mounting column 11 has the same width as the splicing template 2, so that the edges of two adjacent splicing templates 2 can be in contact, thereby enabling the casted forming body to form a right-angle edge after casting; a mounting groove one 12 is formed in each of the four sides of the outer wall of the mounting column 11; two clamping grooves one 13 are symmetrically formed in the inner wall of each of the plurality of mounting groove ones 12; a clamping plate one 14 is fixedly arranged in the inner wall of each of the plurality of mounting groove ones 12; an inner cavity 16 is formed in the mounting column 11; a threaded rod 17 is threadedly connected to the top of the mounting column 11; a rotating wheel 18 is fixedly arranged on the top of the threaded rod 17; the threaded rod 17 penetrates through the mounting column 11 and extends into the inner cavity 16; a plurality of sliding seats 20 are rotatably connected to the outer wall of the threaded rod 17; a push block 19 is fixedly arranged on the bottom of each of the plurality of sliding seats 20; and the push block 19 is sleeved on the surface of the threaded rod 17.

[0039] The inner wall of the inner cavity 16 is slidably connected to multiple groups of connecting rods 21, the outer ends of multiple groups of connecting rods 21 extend to the inside of the mounting groove 12 and are slidably connected thereto, the circumferential outer walls of multiple groups of connecting rods 21 are respectively sleeved with springs 22, the ends of multiple groups of connecting rods 21 are respectively in sliding contact with the push block 19 and the slide seat 20, the inner wall of the inner cavity 16 is slidably connected to multiple groups of connecting rods 23, the ends of multiple groups of connecting rods 23 respectively pass through the mounting column 11 and extend to its outside, the circumferential outer walls of multiple groups of connecting rods 23 are respectively sleeved with springs 24, the ends of multiple groups of connecting rods 23 are respectively connected and fixed to the push block 19 and the slide seat 20, multiple mounting brackets 25 are respectively in contact with the mounting column 11, the outer side walls of multiple mounting brackets 25 are slidably connected with mounting plates 28, the mounting brackets 25 are snap-fitted with the mounting plate 28, and multiple mounting plates 28 are snap-fitted. The outer walls are respectively fixed with sealing plates 29, and the side surfaces of the splicing template 2 are symmetrically structured and fixed with two connecting plates 201. The splicing template 2 and the two connecting plates 201 are combined to form a card slot three 202, and a card plate 14 is snap-fitted with the card slot three 202. Two slide grooves 203 are provided on the inner wall of the connecting plate 201, and a slide rod 204 is fixed on the inner wall of the slide groove 203. A spring three 206 is sleeved on the circumferential outer wall of the slide rod 204, and one end of the spring three 206 is connected and fixed to the inner wall of the slide groove 203, and the other end of the spring three 206 is connected and fixed to the slider 205. The circumferential outer wall of the slide rod 204 is slidably connected to the slider 205, and the inner walls of multiple connecting plates 201 are respectively slidably connected with card plates 207, and the two ends of the card plate 207 are respectively connected and fixed to the slider 205, and the card plate 207 is snap-fitted with the inner wall of the card slot 13.

[0040] In the technical solution of the present application, the surfaces of the multiple clamping plates 14 contacting the mounting columns 11 are respectively provided with mounting grooves 15, the outer ends of the multiple connecting rods 21 are respectively connected and fixed to the inner walls of the mounting grooves 15, the end of the spring 22 is connected and fixed to the inner wall of the mounting groove 15, one end of the spring 22 is connected and fixed to the inner wall of the mounting groove 12, and the other end of the spring 22 is connected and fixed to the clamping plate 14.

[0041] In the technical solution of the present application, multiple mounting frames 25 are respectively provided with mounting grooves three 26 on one side close to the mounting column 11, the outer ends of multiple connecting rods two 23 are respectively connected and fixed to the inner walls of the mounting grooves three 26, one end of the spring two 24 is connected and fixed to the inner wall of the mounting groove three 26, one end of the spring two 24 is connected and fixed to the outer wall of the mounting column 11, and the other end of the spring two 24 is connected and fixed to the mounting frame 25.

[0042] In the technical solution of the present application, the number of each group of connecting rods 1 21 and connecting rods 2 23 is four, and multiple groups of connecting rods 1 21 and connecting rods 2 23 are arranged at equal intervals. Two card slots 27 are respectively provided on the surfaces of multiple mounting frames 25. The card slots 27 are opened from the top of the mounting frame 25 and extended to the middle of the outer wall of the mounting frame 25. The protrusions on the mounting plate 28 are also set to match the depth of the card slots 27, so that after the mounting plate 28 is installed, the mounting plate 28 can be prevented from slipping off the mounting frame 25. The two card slots 27 are respectively located on the two right-angled surfaces of the mounting frame 25, and the mounting frame 25 is engaged with the mounting plate 28 through the card slots 27.

[0043] A method for splicing a leak-proof automated splicing system for concrete formwork, comprising the following steps:

[0044] S1. Insert the two connecting plates 201 on the plurality of splicing templates 2 into the interior of the mounting slot 12 on the mounting column 11, and insert the card plate 14 inside the mounting slot 12 into the interior of the card slot 3 202.

[0045] S2. The threaded rod 17 is driven to rotate by rotating the rotating wheel 18. The threaded rod 17 is screwed into the inside of the mounting column 11 and drives the slide 20 and the push block 19 to move downward. At this time, the push block 19 squeezes the connecting rod 1 21 and the connecting rod 2 23, causing the connecting rod 1 21 and the connecting rod 2 23 to slide toward the outside of the mounting column 11 and push the clamping plate 14 and the mounting bracket 25 to move respectively.

[0046] S3. The second card plate 207 in the connecting plate 201 is squeezed by the first card plate 14 so that the second card plate 207 is inserted into the first card slot 13. When the mounting frame 25 moves, the sealing plate 29 on the outside squeezes the surface of the splicing template 2.

[0047] Working principle: by inserting the two connecting plates 201 on the multiple splicing templates 2 into the interior of the installation slot 12 on the installation column 11, and at the same time inserting the card plate 14 inside the installation slot 12 into the interior of the card slot 3 202, the threaded rod 17 is rotated by rotating the rotating wheel 18, and the threaded rod 17 is screwed into the interior of the installation column 11 and drives the slide 20 and the push block 19 to move downward. At this time, the push block 19 squeezes the connecting rod 1 21 and the connecting rod 23, so that the connecting rod 1 21 and the connecting rod 23 are moved toward the installation column 11. The outer portion slides and pushes the card plate 14 and the mounting bracket 25 to move respectively, and the card plate 14 squeezes the card plate 207 in the connecting plate 201. When the card plate 207 is squeezed, the sliders 205 at both ends slide along the slide rod 204, so that the card plate 207 is stuck into the card slot 13. When the mounting bracket 25 moves, the sealing plate 29 on the outer side squeezes the surface of the splicing template 2, thereby sealing the gap between the splicing template 2 and the mounting column 11 to prevent leakage when injecting concrete slurry;

[0048] By rotating the rotating wheel 18 in the opposite direction, the threaded rod 17 is driven to rotate. At this time, the threaded rod 17 drives multiple slides 20 and push blocks 19 to move upward. Under the pulling force of spring 1 22 and spring 2 24, connecting rod 1 21 drives card plate 1 14 to retract into the inside of mounting groove 1 12 and disengage from the contact with card plate 2 207. At this time, under the pulling force of spring 3 206, card plate 2 207 is moved out from the inside of card groove 1 13. At this time, the splicing template 2 can be disassembled. By pushing the mounting plate 28 upward, the mounting plate 28 is moved out from the inside of card groove 2 27, thereby replacing the mounting plate 28 and the sealing plate 29.

[0049] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A leak-proof automatic splicing device for concrete formwork, comprising a mounting mechanism (1), characterized in that: The mounting mechanism (1) is movably mounted with a splicing template (2) on its surface. The mounting mechanism (1) comprises a mounting column (11) and a plurality of mounting frames (25). The mounting column (11) has the same width as the splicing template (2). Four sides of the outer wall of the mounting column (11) are respectively provided with mounting grooves (12). The inner walls of the plurality of mounting grooves (12) are respectively provided with two card slots (13) in a symmetrical structure. The inner walls of the plurality of mounting grooves (12) are respectively fixed with card plates (14). An inner cavity (16) is provided inside the mounting column (11). The top of the mounting column (11) is threadedly connected to a threaded rod (17). The top of the threaded rod (17) is fixed with a rotating wheel (18). The bottom of the threaded rod (17) passes through the mounting column (11) and extends into the interior thereof. The outer wall of the threaded rod (17) is rotatably connected to a plurality of slides (20). The bottoms of the plurality of slides (20) are respectively fixed with push blocks (19). The push blocks (19) are sleeved on the surface of the threaded rod (17). The inner wall of the inner cavity (16) is slidably connected to a plurality of connecting rods (21), the outer ends of the plurality of connecting rods (21) extend into the interior of the mounting groove (12) and are slidably connected thereto, the circumferential outer walls of the plurality of connecting rods (21) are respectively sleeved with springs (22), the ends of the plurality of connecting rods (21) are respectively in slidable contact with the push block (19) and the slide seat (20), the inner wall of the inner cavity (16) is slidably connected to a plurality of connecting rods (23), the ends of the plurality of connecting rods (23) are respectively passed through the mounting column ( 11) and extending to the outside thereof, multiple groups of the second connecting rod (23) are respectively sleeved with a second spring (24) on the circumferential outer wall, multiple groups of the second connecting rod (23) end portions are respectively connected and fixed to the push block (19) and the slide seat (20), multiple mounting frames (25) are respectively in contact with the mounting column (11), multiple outer side walls of the mounting frames (25) are slidably connected with a mounting plate (28), the mounting frames (25) are snap-fitted with the mounting plate (28), and multiple outer walls of the mounting plates (28) are respectively fixed with a sealing plate (29); The side of the splicing template (2) is symmetrically structured and fixed with two connecting plates (201). The splicing template (2) and the two connecting plates (201) are combined to form a card slot three (202). The card plate one (14) is snap-fitted with the card slot three (202). The inner wall of the connecting plate (201) is provided with two slide grooves (203). The inner wall of the slide groove (203) is fixed with a slide rod (204). The outer wall of the circumference of the slide rod (204) is sleeved with a spring three (206). The outer wall of the circumference of the slide rod (204) is slidably connected with a slider (205). The inner walls of the plurality of connecting plates (201) are respectively slidably connected with a card plate two (207). The two ends of the card plate two (207) are respectively connected and fixed with the slider (205). The card plate two (207) is snap-fitted with the inner wall of the card slot one (13).

2. The leak-proof automatic splicing device for concrete formwork according to claim 1, characterized in that: The surfaces of the plurality of clamping plates (14) in contact with the mounting column (11) are respectively provided with mounting grooves (15), the outer ends of the plurality of connecting rods (21) are respectively connected and fixed to the inner walls of the mounting grooves (15), and the end of the spring (22) is connected and fixed to the inner wall of the mounting grooves (15).

3. The leak-proof automatic splicing device for concrete formwork according to claim 1, characterized in that: One end of the spring (22) is connected and fixed to the inner wall of the mounting groove (12), and the other end of the spring (22) is connected and fixed to the clamping plate (14).

4. The leak-proof automatic splicing device for concrete formwork according to claim 1, characterized in that: A plurality of the mounting frames (25) are provided with mounting grooves three (26) on one side close to the mounting column (11), the outer ends of the plurality of the connecting rods two (23) are respectively connected and fixed to the inner wall of the mounting groove three (26), and one end of the spring two (24) is connected and fixed to the inner wall of the mounting groove three (26).

5. The leak-proof automatic splicing device for concrete formwork according to claim 1, characterized in that: The number of the connecting rods 1 (21) and the connecting rods 2 (23) in each group is four, and the multiple groups of connecting rods 1 (21) and the connecting rods 2 (23) are arranged at equal intervals.

6. The leak-proof automatic splicing device for concrete formwork according to claim 1, characterized in that: One end of the second spring (24) is connected and fixed to the outer wall of the mounting column (11), and the other end of the second spring (24) is connected and fixed to the mounting frame (25).

7. The leak-proof automatic splicing device for concrete formwork according to claim 1, characterized in that: Two second card slots (27) are respectively provided on the surfaces of the plurality of mounting frames (25), and the two second card slots (27) are respectively located on two right-angled surfaces of the mounting frame (25). The mounting frame (25) is engaged with the mounting plate (28) via the second card slots (27).

8. The leak-proof automatic splicing device for concrete formwork according to claim 1, characterized in that: One end of the spring three (206) is connected and fixed to the inner wall of the slide groove (203), and the other end of the spring three (206) is connected and fixed to the slider (205).

9. A method for splicing a leak-proof automatic splicing device for concrete formwork, applicable to the leak-proof automatic splicing device for concrete formwork according to claim 8, characterized in that: The following steps are involved: S1, inserting two connecting plates (201) on the plurality of splicing templates (2) into the interior of the first installation slot (12) on the installation column (11), and inserting the first card plate (14) inside the first installation slot (12) into the interior of the third card slot (202); S2. The threaded rod (17) is rotated by rotating the rotating wheel (18). The threaded rod (17) is screwed into the interior of the mounting column (11) and drives the slide (20) and the push block (19) to move downward. At this time, the push block (19) squeezes the connecting rod 1 (21) and the connecting rod 2 (23), causing the connecting rod 1 (21) and the connecting rod 2 (23) to slide toward the outside of the mounting column (11) and push the card plate 1 (14) and the mounting frame (25) to move respectively. S3. The second card plate (207) in the connecting plate (201) is squeezed by the first card plate (14), so that the second card plate (207) is inserted into the first card slot (13). When the mounting frame (25) moves, the outer sealing plate (29) is used to squeeze the surface of the splicing template (2).

Citation Information

Patent Citations

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