A support structure for high-altitude cantilever formwork construction

Abstract

This utility model discloses a support structure for high-altitude cantilever formwork construction, relating to the technical field of formwork construction equipment. The utility model includes a frame section for splicing support brackets for cantilever formwork; and a quick-release section installed on the front of the frame section for rapid installation of the frame section and the quick-release section. The splicing design of the frame section facilitates adjustments by workers according to actual conditions. Specifically, the utility model involves inserting a mounting slot into a mounting block to connect two frame components on the left and right sides. Then, releasing the arc-shaped tie rod causes the spring to release pressure outwards and push the sliding plate backwards, thereby causing the sliding rods to move relative to each other and insert into the top plate and L-shaped back plate of the frame. The frame components are installed through splicing. The frame section has small parts, allowing for flexible adjustments according to actual conditions, thus ensuring efficient formwork support installation.

Description

Technical Field

[0001] This utility model belongs to the technical field of formwork construction equipment, and in particular relates to a support structure for high-altitude cantilever formwork construction. Background Technology

[0002] High-altitude cantilever formwork is a construction technique used to build concrete pouring formwork for cantilevered sections in high-rise buildings or bridges. Cantilever structures refer to sections that extend outward from the main structure and are suspended in the air, such as balconies, eaves, or cantilever beams. Since there is no support below the cantilever structure, high-altitude cantilever formwork needs to be fixed to the main structure with steel structures, cables, or diagonal braces to ensure the stability of the formwork and to withstand the load during concrete pouring.

[0003] Existing high-altitude cantilever formwork typically uses steel plates and steel frames for support. However, these steel plates and frames are relatively large and bulky, and cannot be flexibly adjusted. They require the assistance of large machinery such as cranes and tower cranes for adjustment, which affects the installation efficiency of the formwork support. Therefore, we propose a support structure for high-altitude cantilever formwork construction. Utility Model Content

[0004] The purpose of this utility model is to provide a support structure for high-altitude cantilever formwork construction. Specifically, by setting up a frame section, a mounting slot is inserted into a mounting block, connecting two frame components on the left and right sides. Then, the arc-shaped tie rod is released, causing the spring to release pressure outward and push the sliding plate backward. This, in turn, causes the sliding rods to move relative to each other and insert into the interior of the frame top plate and the L-shaped back plate. The frame components are then installed through splicing. The parts of the frame section are relatively small, allowing for flexible adjustments based on actual conditions, thus ensuring the installation efficiency of the formwork support. This solves the problem that existing high-altitude cantilever formwork typically uses steel plates and frames for support, but these steel plates and frames are large and bulky, making flexible adjustments impossible and requiring the use of large machinery such as cranes and tower cranes, thus affecting the installation efficiency of the formwork support.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a support structure for high-altitude cantilever formwork construction, including a frame part, which is used to splice support brackets for supporting cantilever formwork.

[0007] A quick-release part is installed on the front of the frame part to facilitate quick installation between the frame part and the quick-release part.

[0008] The splicing design of the frame section allows staff to make adjustments based on actual conditions.

[0009] Furthermore, the frame portion includes a frame assembly, which is installed at the bottom of the formwork and is used to support the formwork from the bottom and the front.

[0010] An installation component is used to complete the connection between two frame components;

[0011] Among them, the installation components are used to adjust the connection of the frame components according to the actual size of the formwork.

[0012] Furthermore, the quick-release part includes a quick-release assembly for positioning itself on the front of the frame assembly;

[0013] An auxiliary component is used to restrict the movement of internal parts of the quick-release assembly;

[0014] The pre-positioning of the quick-release component facilitates quick adjustments to the device by staff.

[0015] Furthermore, the frame assembly includes a frame top plate, which is installed at the bottom of the formwork. An L-shaped back plate is installed at the bottom of the frame top plate. An installation groove 1 is installed on the left side of the frame top plate, and an installation block 1 is installed on the right side of the frame top plate. An installation groove 2 is installed on the left side of the L-shaped back plate, and an installation block 2 is installed on the right side of the L-shaped back plate.

[0016] By setting the first mounting slot and the first mounting block to be inserted, the two frame top plates can be spliced ​​together, and by setting the second mounting slot and the second mounting block to be inserted, the two L-shaped back plates can be spliced ​​together.

[0017] The mounting slot one and mounting slot two are inserted into the mounting block one and mounting block two to quickly complete the positioning of the two frame components.

[0018] Furthermore, the mounting assembly includes two rounded corner protrusions, which are respectively mounted on the front of mounting slot one and mounting slot two. A square hole groove is formed in the center of the rounded corner protrusion. An arc-shaped pull rod is provided on the front of the rounded corner protrusion. Two sliding rods are mounted on the back of the arc-shaped pull rod. The sliding rods pass through the rounded corner protrusion and continue to extend backward. The two sliding rods are arranged in a vertical array with the rounded corner protrusion as the center. A sliding plate is mounted on the back of the two sliding rods. A spring is sleeved on the outer surface of each of the two sliding rods. The back of the spring is mounted on the front of the sliding plate, and the front of the spring is mounted on the inner surface of the front of the square hole groove.

[0019] By setting a spring, the spring can rebound and reset, causing the slide to move the slide bar, thereby completing the installation and locking between the two frame components;

[0020] The outer surface of the slide plate is slidably connected to the inner surface of the square hole groove, and the slide rod is used to lock the connection between the two frame components.

[0021] Furthermore, the quick-release assembly includes a trapezoidal insert plate disposed on the front of the L-shaped back plate. Rotary wheel housings are disposed on both the left and right sides of the trapezoidal insert plate. The backs of both rotary wheel housings are mounted on the outer surface of the front of the L-shaped back plate. A pin is installed inside each rotary wheel housing, and a shaped rotary wheel is rotatably connected to the outer surface of the pin. A first telescopic spring is installed on the top of the inner surface of the back of the rotary wheel housing, with its front contacting the shaped rotary wheel. A second telescopic spring is installed on the bottom of the inner surface of the back of the rotary wheel housing. A rectangular protrusion is disposed on the top of the front of the shaped rotary wheel, and a hook is installed on the bottom of the front of the shaped rotary wheel. A square-hole round rod is disposed on the front of the second telescopic spring, and a shaped arc plate is mounted on the front of the square-hole round rod. The shaped arc plate is mounted on the outer surface of the trapezoidal insert plate.

[0022] By setting a rectangular protrusion, the rotation of the irregularly shaped rotating block can be controlled, thereby controlling the movement of the hook. When the hook is pulled out from the square hole round rod, the rotating wheel housing will end its connection with the trapezoidal insert plate.

[0023] The tip of the hook at the bottom is inserted into the groove of the square hole round rod, and the trapezoidal insert plate is connected to the top plate of the frame by hooking the square hole round rod.

[0024] Furthermore, the auxiliary component includes a rectangular slide plate, which is mounted on the front of the rectangular protrusion. Irregularly shaped sliders are mounted on the left and right sides of the rectangular protrusion. Irregularly shaped slide rails are provided on the left and right sides of the top of the rotary wheel housing. The irregularly shaped slide rails are adapted to the sliding limit of the irregularly shaped sliders. A rectangular button is mounted on the front of the rectangular slide plate.

[0025] By setting sliding limit adapters between irregularly shaped sliders and irregularly shaped slide rails, the movement of rectangular protrusions can be limited, preventing the rectangular protrusions from falling to the bottom of the rotary wheel housing and affecting the operation.

[0026] The auxiliary component also includes two slots, which are respectively located at the bottom of the frame top plate and the top of the L-shaped back plate. The top and bottom of the trapezoidal insert plate are equipped with insert blocks, which are inserted into the slots. The insertion is used to complete the initial installation of the trapezoidal insert plate and the L-shaped back plate, and to assist in the subsequent installation process.

[0027] This utility model has the following beneficial effects:

[0028] 1. This utility model, by setting a frame part, specifically inserts the mounting groove into the mounting block, connects the two frame components on the left and right sides together, then releases the arc-shaped tie rod, causing the spring to release pressure outward and push the slide plate to move backward, thereby driving the sliding rod to move relative to each other and insert into the interior of the frame top plate and the L-shaped back plate. The frame components are installed by splicing. The parts of the frame part are small, which makes it easy to make flexible adjustments according to the actual situation, thereby ensuring the installation efficiency of the formwork support.

[0029] 2. This utility model, by setting a quick-release part, specifically involves inserting a trapezoidal insert plate into the front of the L-shaped back plate, then moving the rectangular protrusion backward to cause the irregularly shaped rotating wheel to drive the hook to rotate backward, then inserting the square hole round rod into the rotating wheel housing, then releasing the rectangular protrusion to cause the telescopic spring to drive the hook to reset and lock the square hole round rod, thus installing the trapezoidal insert plate at the bottom of the frame top plate, improving the support force between the frame top plate and the L-shaped back plate, and improving the support strength of the frame part.

[0030] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the frame top plate structure of this utility model;

[0034] Figure 3 This is a schematic diagram of the trapezoidal insert structure of this utility model;

[0035] Figure 4 This is a schematic cross-sectional view of the rotor housing of this utility model;

[0036] Figure 5 This is a schematic diagram of the rectangular button structure of this utility model.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1. Frame section; 11. Frame assembly; 111. Frame top plate; 112. L-shaped back plate; 113. Mounting slot one; 114. Mounting block one; 115. Mounting slot two; 116. Mounting block two; 12. Mounting assembly; 121. Rounded corner protrusion; 122. Square hole slot; 123. Arc tie rod; 124. Slide rod; 125. Slide plate; 126. Spring; 2. Quick release section; 21. Quick release assembly; 211. Ladder 212. Shaped insert plate; 213. Rotary wheel housing; 214. Pin shaft; 2151. Irregularly shaped rotary wheel; 2152. Telescopic spring one; 2153. Telescopic spring two; 216. Rectangular protrusion; 217. Hook; 218. Square hole round rod; 219. Irregularly shaped arc plate; 22. Auxiliary components; 221. Rectangular slide plate; 222. Irregularly shaped slider; 223. Irregularly shaped slide rail; 224. Rectangular button; 225. Insert block; 226. Slot. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0040] Please see Figures 1-5 As shown, this utility model is a support structure for high-altitude cantilever formwork construction, including a frame part 1, which is used to splice support brackets for cantilever formwork.

[0041] Quick-release part 2 is installed on the front of frame part 1 to complete the quick installation of frame part 1 and quick-release part 2.

[0042] The splicing design of frame section 1 allows staff to make adjustments based on actual conditions.

[0043] The frame part 1 includes a frame assembly 11, which is installed at the bottom of the formwork and is used to support the formwork from the bottom and the front.

[0044] Install component 12, which is used to complete the connection between the two frame components 11;

[0045] The installation component 12 is used to adjust the connection of the frame component 11 according to the actual size of the formwork.

[0046] The quick-release part 2 includes a quick-release component 21, which is used to position itself on the front of the frame component 11;

[0047] Auxiliary component 22 is used to restrict the movement of internal parts of quick-release component 21;

[0048] The pre-positioning of the quick-release component 21 facilitates quick adjustments to the device by staff.

[0049] The frame assembly 11 includes a frame top plate 111, which is installed at the bottom of the formwork. An L-shaped back plate 112 is installed at the bottom of the frame top plate 111. An installation groove 113 is installed on the left side of the frame top plate 111, and an installation block 114 is installed on the right side of the frame top plate 111. An installation groove 115 is installed on the left side of the L-shaped back plate 112, and an installation block 116 is installed on the right side of the L-shaped back plate 112.

[0050] Among them, mounting slot 113 and mounting slot 215 are connected to mounting block 114 and mounting block 216 to quickly complete the positioning of the two frame components 11.

[0051] Mounting assembly 12 includes two rounded corner protrusions 121, which are respectively mounted on the front of mounting slot 113 and mounting slot 2 115. A square hole slot 122 is provided in the center of the rounded corner protrusion 121. An arc-shaped pull rod 123 is provided on the front of the rounded corner protrusion 121. Two sliding rods 124 are mounted on the back of the arc-shaped pull rod 123. The sliding rods 124 pass through the rounded corner protrusion 121 and continue to extend backward. The two sliding rods 124 are arranged in a vertical array with the rounded corner protrusion 121 as the center. A sliding plate 125 is mounted on the back of the two sliding rods 124. A spring 126 is sleeved on the outer surface of each of the two sliding rods 124. The back of the spring 126 is mounted on the front of the sliding plate 125, and the front of the spring 126 is mounted on the inner surface of the front of the square hole slot 122.

[0052] Insert the mounting slot 113 into the mounting block 114, connect the two frame components 11 on the left and right sides together, then loosen the arc-shaped tie rod 123, so that the spring 126 releases pressure outward and pushes the slide plate 125 to move backward, thereby driving the slide rod 124 to move relative to each other and insert into the interior of the frame top plate 111 and the L-shaped back plate 112. The installation of the frame component 11 is completed by splicing. The parts of the frame part 1 are small, which makes it easy to make flexible adjustments according to the actual situation, thereby ensuring the installation efficiency of the formwork support.

[0053] The outer surface of the slide plate 125 is slidably connected to the inner surface of the square hole groove 122, and the slide rod 124 is used to lock the connection between the two frame components 11.

[0054] The quick-release assembly 21 includes a trapezoidal insert plate 211, which is disposed on the front of the L-shaped back plate 112. Rotary wheel housings 212 are disposed on both the left and right sides of the trapezoidal insert plate 211. The backs of both rotary wheel housings 212 are mounted on the outer surface of the front of the L-shaped back plate 112. A pin 213 is installed inside the rotary wheel housing 212, and a shaped rotary wheel 214 is rotatably connected to the outer surface of the pin 213. A telescopic spring 2151 is installed on the top of the inner surface of the back of the rotary wheel housing 212. The front of the first telescopic spring 2151 contacts the irregularly shaped rotating wheel 214. The second telescopic spring 2152 is installed at the bottom of the inner surface of the back of the rotating wheel housing 212. A rectangular protrusion 216 is provided at the top of the front of the irregularly shaped rotating wheel 214. A hook 217 is installed at the bottom of the front of the irregularly shaped rotating wheel 214. A square hole round rod 218 is provided on the front of the second telescopic spring 2152. An irregularly shaped arc plate 219 is installed on the front of the square hole round rod 218. The irregularly shaped arc plate 219 is installed on the outer surface of the trapezoidal insert plate 211.

[0055] Insert the trapezoidal insert 211 into the front of the L-shaped back plate 112, then move the rectangular protrusion 216 backward, causing the irregular rotating wheel 214 to drive the hook 217 to rotate backward. Then insert the square hole round rod 218 into the rotating wheel housing 212, then release the rectangular protrusion 216, causing the telescopic spring 2151 to drive the hook 217 to reset and lock the square hole round rod 218. Install the trapezoidal insert 211 at the bottom of the frame top plate 111 to increase the support force between the frame top plate 111 and the L-shaped back plate 112, and increase the support strength of the frame part 1.

[0056] The tip of the hook 217 is inserted into the groove of the square hole round rod 218, and the trapezoidal insert plate 211 is connected to the frame top plate 111 by hooking the square hole round rod 218 with the hook 217.

[0057] The auxiliary component 22 includes a rectangular slide plate 221, which is mounted on the front of the rectangular protrusion 216. Irregularly shaped sliders 222 are mounted on the left and right sides of the rectangular protrusion 216. Irregularly shaped slide rails 223 are provided on the left and right sides of the top of the rotary wheel housing 212. The irregularly shaped slide rails 223 are adapted to the sliding limit of the irregularly shaped sliders 222. A rectangular button 224 is mounted on the front of the rectangular slide plate 221.

[0058] The auxiliary component 22 also includes two slots 226, which are respectively located at the bottom of the frame top plate 111 and the top of the L-shaped back plate 112. The top and bottom of the trapezoidal insert plate 211 are equipped with insert blocks 225, which are inserted into the slots 226. The insertion is used to complete the initial installation of the trapezoidal insert plate 211 and the L-shaped back plate 112, and to assist in the subsequent installation process.

[0059] A specific application of this embodiment is as follows: In use, firstly, take out several sets of frame parts 1 and several sets of quick-release parts 2, then measure the length of the formwork, and then splice the frame assembly 11 according to the measured data. Insert the first mounting block 114 into the first mounting groove 113, insert the second mounting block 116 into the second mounting groove 115, then loosen the arc pull rod 123, so that the slide rod 124 is inserted into the inside of the frame top plate 111 and the L-shaped back plate 112 under the action of the spring 126 returning to its original position, and lock the left frame assembly 11 and the right frame assembly 11 together. Then use bolts to install the frame assembly 11 connected together at the bottom of the formwork to support the formwork from the bottom.

[0060] Next, take out the trapezoidal insert plate 211, then align the insert block 225 with the slot 226, and insert the insert block 225 into the slot 226. When the trapezoidal insert plate 211 is inserted, it will drive the square hole round rod 218 to move backward through the irregular arc plate 219, and insert the square hole round rod 218 into the interior of the trapezoidal insert plate 211.

[0061] Next, the rectangular slide 221 is pushed backward along the irregular slide rail 223 by the rectangular button 224, which drives the irregular rotating wheel 214 to rotate backward, causing the hook 217 to rise. Then, the square hole round rod 218 is moved to the bottom of the hook 217. Then, the rectangular button 224 is released, and the telescopic spring 2151 drives the irregular rotating wheel 214 and the rectangular protrusion 216 to reset under the rebound action. The hook 217 is then inserted into the square hole round rod 218 to complete the installation of the trapezoidal insert 211. Then, the trapezoidal insert 211 is installed together with the frame top plate 111 and the L-shaped back plate 112 using bolts.

[0062] Finally, after the concrete inside the formwork has solidified, remove the bolts connecting the trapezoidal insert plate 211 and the frame assembly 11, then press the rectangular button 224 to release the locking of the hook 217 onto the round rod 218 in the opposite hole, then pull out the trapezoidal insert plate 211, then pull the arc-shaped tie rod 123 outwards, and move the slide plate 125 through the slide rod 124, so that the slide plate 125 squeezes the spring 126, pulling the slide rod 124 out from the inside of the frame top plate 111 and the L-shaped back plate 112, releasing the connection between several frame assemblies 11, then remove the bolts connecting the frame assembly 11 and the formwork mold, and then dismantle the formwork.

[0063] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A support structure for high altitude cantilever formwork construction, characterized in that, include: Frame part (1), the frame part (1) is used to splice the support bracket for supporting the cantilever formwork; Quick-release part (2), which is installed on the front of the frame part (1) to complete the quick installation of the frame part (1) and the quick-release part (2); The splicing arrangement of the frame part (1) makes it convenient for staff to make adjustments according to the actual situation.

2. The support structure for high-altitude cantilever formwork construction according to claim 1, characterized in that, The frame part (1) includes a frame assembly (11) which is installed at the bottom of the formwork and is used to support the formwork from the bottom and the front. Mounting component (12) is used to complete the connection between two frame components (11); The installation component (12) is used to adjust the connection of the frame component (11) according to the actual size of the formwork.

3. A support structure for high-altitude cantilever formwork construction according to claim 2, characterized in that, The quick-release part (2) includes a quick-release component (21) for positioning itself on the front of the frame component (11); Auxiliary component (22) for restricting the movement of internal parts of quick-release assembly (21); The pre-positioning of the quick-release component (21) facilitates quick adjustments to the device by the staff.

4. A support structure for high-altitude cantilever formwork construction according to claim 3, characterized in that, The frame assembly (11) includes a frame top plate (111), which is installed at the bottom of the formwork. An L-shaped back plate (112) is installed at the bottom of the frame top plate (111). An installation groove 1 (113) is installed on the left side of the frame top plate (111), and an installation block 1 (114) is installed on the right side of the frame top plate (111). An installation groove 2 (115) is installed on the left side of the L-shaped back plate (112), and an installation block 2 (116) is installed on the right side of the L-shaped back plate (112). The mounting slot one (113) and mounting slot two (115) are connected to mounting block one (114) and mounting block two (116) to quickly complete the positioning of the two frame components (11).

5. A support structure for high-altitude cantilever formwork construction according to claim 4, characterized in that, The mounting assembly (12) includes two rounded corner protrusions (121), which are respectively mounted on the front of mounting groove one (113) and mounting groove two (115). A square hole groove (122) is provided at the center of the rounded corner protrusion (121). An arc-shaped pull rod (123) is provided on the front of the rounded corner protrusion (121). Two sliding rods (124) are installed on the back of the arc-shaped pull rod (123). The sliding rods (124) pass through the rounded corner protrusion (121) and extend backward. The two sliding rods (124) are arranged in a vertical array with the rounded corner protrusion (121) as the center. A sliding plate (125) is installed on the back of the two sliding rods (124). A spring (126) is sleeved on the outer surface of each of the two sliding rods (124). The back of the spring (126) is installed on the front of the sliding plate (125). The front side is mounted on the inner surface of the front side of the square hole groove (122); The outer surface of the slide plate (125) is slidably connected to the inner surface of the square hole groove (122), and the slide rod (124) is provided to lock the connection between the two frame components (11).

6. A support structure for high-altitude cantilever formwork construction according to claim 5, characterized in that, The quick-release assembly (21) includes a trapezoidal insert plate (211), which is disposed on the front of the L-shaped back plate (112). The trapezoidal insert plate (211) has a rotating wheel housing (212) on both the left and right sides. The backs of the two rotating wheel housings (212) are mounted on the outer surface of the front of the L-shaped back plate (112). A pin (213) is installed inside the rotating wheel housing (212). A shaped rotating wheel (214) is rotatably connected to the outer surface of the pin (213). A telescopic spring (2151) is installed on the top of the inner surface of the back of the rotating wheel housing (212). The front of the first telescopic spring (2151) contacts the irregular rotating wheel (214). The bottom of the inner surface of the back of the rotating wheel housing (212) is equipped with the second telescopic spring (2152). The top of the front of the irregular rotating wheel (214) is provided with a rectangular protrusion (216). The bottom of the front of the irregular rotating wheel (214) is equipped with a hook (217). The front of the second telescopic spring (2152) is provided with a square hole round rod (218). The front of the square hole round rod (218) is equipped with an irregular arc plate (219). The irregular arc plate (219) is installed on the outer surface of the trapezoidal insert plate (211). The tip of the hook (217) is inserted into the groove of the square hole rod (218), and the trapezoidal insert plate (211) is connected to the frame top plate (111) by hooking the square hole rod (218) with the hook (217).

7. A support structure for high-altitude cantilever formwork construction according to claim 6, characterized in that, The auxiliary component (22) includes a rectangular slide plate (221), which is mounted on the front of a rectangular protrusion (216). Irregularly shaped sliders (222) are mounted on the left and right sides of the rectangular protrusion (216). Irregularly shaped slide rails (223) are provided on the left and right sides of the top of the rotary wheel housing (212). The irregularly shaped slide rails (223) are adapted to slide and limit the irregularly shaped sliders (222). A rectangular button (224) is mounted on the front of the rectangular slide plate (221). The auxiliary component (22) further includes two slots (226), which are respectively located at the bottom of the frame top plate (111) and the top of the L-shaped back plate (112). The top and bottom of the trapezoidal insert plate (211) are equipped with insert blocks (225), which are inserted into the slots (226). The insertion is used to complete the initial installation of the trapezoidal insert plate (211) and the L-shaped back plate (112) and to assist in the subsequent installation process.

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