An ALC board outer steel structure

Abstract

This application relates to an ALC panel outer steel structure, belonging to the field of prefabricated building technology; the outer steel structure includes a base plate, which is used to be set at the bottom of the ALC panel, and the peripheral wall of the base plate is provided with a connecting frame that fits against the side wall of the ALC panel, and also includes a locking member, which is used to fix the connecting frame to the ALC panel; this application has the effect of improving the protection of the ALC panel by the outer steel structure.

Description

Technical Field

[0001] This application relates to the field of prefabricated building technology, and in particular to an ALC panel-clad steel structure. Background Technology

[0002] ALC is short for autoclaved lightweight concrete, a type of high-performance autoclaved aerated concrete. ALC panels are porous concrete slabs made primarily from fly ash (or silica sand), cement, and lime, cured under high-pressure steam. The internal steel reinforcement of ALC panels effectively enhances their strength. ALC panels can be used as wall materials or roofing panels, making them a high-performance new building material.

[0003] Traditional ALC panel cladding with steel structures involves installing a horizontal steel plate directly on the bottom of the ALC panel. However, the horizontal steel plate cannot completely cover the ALC panel, leaving most of the ALC panel exposed to the outside environment, which can easily lead to damage. Summary of the Invention

[0004] To improve the protective effect of the outer steel cladding on the ALC plate, this application provides an outer steel cladding structure for the ALC plate.

[0005] This application provides a steel cladding structure for ALC plates, employing the following technical solution:

[0006] A steel cladding structure for an ALC panel includes a base plate for mounting on the bottom of the ALC panel. The base plate has a connecting frame attached to the side wall of the ALC panel on its peripheral wall. The structure also includes a locking member for fixing the connecting frame to the ALC panel.

[0007] By adopting the above technical solution, the base plate is set at the bottom of the ALC board, so that the connecting frame fits against the side wall of the ALC board. The connecting frame is fixed to the ALC board by the locking device, and the side wall of the ALC board is covered by the connecting frame. In this way, the ALC board is covered by the whole formed by the connecting frame and the base plate. This not only protects the ALC board and extends its service life, but also reduces most of the ALC board exposed to the outside world, which has an aesthetic effect.

[0008] Preferably, a partition plate is provided on the base plate, and the partition plate is inserted inside the ALC plate.

[0009] By adopting the above technical solution, the partition plate is set on the base plate and inserted into the ALC plate, thereby achieving the effect of partitioning and improving the overall structural strength of the base plate and connecting frame.

[0010] Preferably, a partition plate is provided on the base plate, and a connecting groove is formed on the side wall of the partition plate along the length direction. A connecting rod is slidably connected to the inner wall of the connecting groove along the length direction. A plurality of slots for inserting the ends of the connecting rods are formed on the inner wall of the connecting frame along the length direction. A moving hole is formed on the side of the partition plate away from the base plate along the width direction. A pushing rod is slidably connected to the inner wall of the moving hole. Both the connecting rod and the pushing rod have beveled ends that are close to each other, so that when the pushing rod moves along the inner wall of the moving hole, the connecting rod moves along the inner wall of the connecting groove. A fixing member is provided on the partition plate to fix the pushing rod to the partition plate.

[0011] By adopting the above technical solution, the push rod is moved along the length of the inner wall of the moving hole, so that the push rod pushes the connecting rod to move along the length of the inner wall of the connecting groove until the end of the connecting rod is inserted into the inner wall of the corresponding slot. Then, the push rod is fixed to the partition plate by the fastener, which makes it easier for the staff to fix the push rod and effectively improves the stability of the end of the connecting rod inserted into the inner wall of the corresponding slot. The above operation can effectively adjust the position of the partition plate in the base plate so as to improve the adaptability of the partition plate to the ALC plate.

[0012] Preferably, the fixing component includes a first connecting rod, a first dovetail block, a second connecting rod, and a first elastic element. The side wall of the push rod has a mounting hole. The end of the first connecting rod is hinged to the inner wall of the mounting hole. The side of the first connecting rod near the connecting rod has a first dovetail groove for the first dovetail block to slide. One end of the first elastic element is disposed on the side wall of the first dovetail block, and the other end of the first elastic element is disposed on the inner wall of the first dovetail groove. One end of the second connecting rod is disposed on the side of the first dovetail block away from the first connecting rod, and the other end of the second connecting rod is disposed on the inner wall of the mounting hole. The interior of the partition plate has a fixing groove for the first connecting rod to be inserted.

[0013] By adopting the above technical solution, when the push rod is inserted into the inner wall of the moving hole, the push rod drives the connecting rod to move along the length direction of the inner wall of the connecting groove under the action of the guide angle, so that the end of the connecting rod is inserted into the inner wall of the slot at the corresponding position. At this time, the end of the first connecting rod is inserted into the inner wall of the fixed groove, and the stability of the first dovetail block located in the inner wall of the first dovetail groove is improved by the first elastic element, thereby improving the stability of the first connecting rod inserted into the inner wall of the fixed groove, and further improving the stability of the end of the connecting rod inserted into the inner wall of the slot at the corresponding position.

[0014] Preferably, both ends of the partition plate are provided with extension plates, which abut against the side wall of the ALC plate. Fasteners are provided between the extension plates and the partition plate to fix the extension plates to the partition plate.

[0015] By adopting the above technical solution, extension plates are provided at both ends of the partition board. On the one hand, the extension plates serve as edging, thereby completely covering the ALC board. On the other hand, the strength of the partition board on the base plate is improved.

[0016] Preferably, the fastener includes a stabilizing rod, a fastening screw, and a fastening nut. The stabilizing rod is located at the end of the partition plate near the extension plate, and the fastening screw is located at the end of the stabilizing rod away from the partition plate. The side wall of the extension plate has a through-hole for the fastening screw and the stabilizing rod to pass through in sequence. The fastening nut is threaded onto the fastening screw, and the fastening nut and the side of the extension plate that are close to each other abut against each other.

[0017] By adopting the above technical solution, when the staff installs the extension plate, the fastening screw and the stabilizing rod are passed through the inner wall of the fastening hole in sequence until the side of the extension plate and the partition plate that are close to each other abuts, and the side of the extension plate and the connecting frame that are close to each other abuts. Then the fastening nut is threaded onto the fastening screw until the fastening nut and the side of the extension plate that are close to each other abuts, thereby fixing the extension plate to the partition plate.

[0018] Preferably, a locking rack is provided on the side of the connecting rod near the base plate, an installation cavity is provided inside the partition plate, a rotating tube is rotatably connected to the inner wall of the installation cavity, a locking gear is provided on the side wall of the rotating tube, the locking gear and the locking rack mesh with each other, a positioning rod is threadedly connected to the inner wall of the rotating tube, a second dovetail block is provided at the end of the positioning rod, a second dovetail groove is provided along the length direction of the inner wall of the installation cavity for the second dovetail block to slide, and a positioning tube for the end of the positioning rod to be inserted is pre-embedded on the ALC plate.

[0019] By adopting the above technical solution, when the connecting rod moves along the length of the inner wall of the connecting groove, the locking rack and locking gear mesh with each other, causing the rotating tube to rotate. At this time, the second dovetail block connected to the positioning rod moves along the length of the inner wall of the second dovetail groove, thereby driving the positioning rod to move along the length of the inner wall of the mounting cavity until the end of the positioning rod is inserted into the positioning tube. Thus, when the partition plate is fixed on the connecting frame, the ALC plate is simultaneously fixed on the partition plate, thereby improving the wrapping stability of the outer frame on the ALC plate.

[0020] Preferably, the end of the positioning rod is provided with a guide surface for easy insertion into the positioning tube.

[0021] By adopting the above technical solution, the setting of the guide surface reduces the frictional resistance of the end of the positioning rod being inserted into the positioning tube, thereby facilitating the quick and convenient insertion of the end of the positioning rod into the positioning tube.

[0022] Preferably, the peripheral wall of the connecting frame is provided with a clearance groove, and the inner wall of the clearance groove is provided with a waterproof pad, which abuts against the side of the ALC plate that is close to each other.

[0023] By adopting the above technical solution, the waterproof pad is placed on the inner wall of the relief groove, which effectively improves the sealing between the connecting frame and the ALC plate, thereby reducing the possibility of water accumulating between the connecting frame and the ALC plate, and thus extending the service life of the ALC plate.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The base plate is placed at the bottom of the ALC board, so that the connecting frame fits against the side wall of the ALC board. The connecting frame is fixed to the ALC board by locking devices. The connecting frame then covers the side wall of the ALC board. The ALC board is covered by the whole formed by the connecting frame and the base plate. This not only protects the ALC board and extends its service life, but also reduces most of the ALC board exposed to the outside world, which has an aesthetic effect.

[0026] 2. The partition board is placed on the base plate and inserted inside the ALC plate, thereby achieving the effect of partitioning and improving the overall structural strength of the base plate and connecting frame. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an ALC plate encased in steel structure according to an embodiment of this application.

[0028] Figure 2 This is a cross-sectional view used to illustrate the partition plate connection structure in Embodiment 1 of this application.

[0029] Figure 3 This is a cross-sectional view used to illustrate the partition plate connection structure in Embodiment 2 of this application.

[0030] Figure 4 yes Figure 3 A magnified view of a portion of structure A in the middle.

[0031] Figure 5 This is a cross-sectional view used to illustrate the structure of the fastener in Embodiment 2 of this application.

[0032] Figure 6 yes Figure 5 A magnified view of a portion of the B-structure.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Base plate; 2. Connecting frame; 21. Locking component; 22. Slot; 23. Clearance groove; 231. Waterproof pad; 3. Partition plate; 31. Connecting groove; 311. Connecting rod; 3111. Chamfer; 3112. Locking rack; 32. Moving hole; 321. Push rod; 3211. Mounting hole; 33. Fixing groove; 34. Mounting cavity; 341. Second dovetail groove; 4. Fixing component; 41. First connecting rod; 411. First dovetail groove; 42. First dovetail block; 43. Second connecting rod; 44. First elastic component; 5. Extension plate; 51. Fastening hole; 6. Fastener; 61. Stabilizing rod; 62. Fastening screw; 63. Fastening nut; 7. Rotating tube; 71. Locking gear; 72. Positioning rod; 721. Second dovetail block; 722. Guide surface; 8. ALC plate; 81. Positioning tube. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0036] Example 1

[0037] Embodiment 1 of this application discloses a steel cladding structure for an ALC plate. (Refer to...) Figure 1 and Figure 2 The ALC panel's outer steel structure includes a base plate 1, which is installed on the bottom of the ALC panel 8. A connecting frame 2 is welded to the periphery of the base plate 1, and the connecting frame 2 is used to fit against the side wall of the ALC panel 8. The ALC panel's outer steel structure also includes a locking member 21, which is used to fix the connecting frame 2 to the ALC panel 8. In Embodiment 1 of this application, the locking member 21 can be a rivet or a bolt, so that the connecting frame 2 and the base plate 1 form a whole that shields the ALC panel 8. This not only protects the ALC panel 8 and extends its service life, but also reduces most of the ALC panel 8's exposure to the outside world, thus having an aesthetic effect.

[0038] Reference Figure 2 The connecting frame 2 has a relief groove 23 on its peripheral wall. The inner wall of the relief groove 23 is glued with a waterproof pad 231. In Embodiment 1 of this application, the waterproof pad 231 is made of rubber. When the connecting frame 2 abuts against the side wall of the ALC plate 8, the waterproof pad 231 and the side of the ALC plate 8 that are close to each other abut against each other; thereby improving the sealing between the connecting frame 2 and the ALC plate 8, and reducing the possibility of water depositing between the connecting frame 2 and the ALC plate 8.

[0039] Reference Figure 2 A partition plate 3 is welded onto the base plate 1 and inserted into the ALC plate 8. When the partition plate 3 is inserted into the ALC plate 8, both ends of the partition plate 3 abut against the inner wall of the connecting frame 2; thus, the partition plate 3 serves to separate the base plate and improve the overall structural strength of the base plate 1 and the connecting frame 2.

[0040] Reference Figure 2 Both ends of the partition plate 3 are equipped with extension plates 5, which abut against the side wall of the ALC plate 8. Fasteners 6 are provided between the extension plates 5 and the partition plate 3 to fix the extension plates 5 to the partition plate 3.

[0041] Reference Figure 2 The fastener 6 includes a stabilizing rod 61, a fastening screw 62, and a fastening nut 63. The stabilizing rod 61 is welded to the end of the partition plate 3 near the extension plate 5, and the fastening screw 62 is welded to the end of the stabilizing rod 61 away from the partition plate 3. A fastening hole 51 is provided through the side wall of the extension plate 5 for the fastening screw 62 and the stabilizing rod 61 to pass through sequentially. The fastening nut 63 is threaded onto the fastening screw 62, and the fastening nut 63 and the side of the extension plate 5 closest to each other abut against each other. In this embodiment of the application... The stabilizing rod 61 is a square rod, and the fastening hole 51 is a square groove. When the worker installs the extension plate 5, the fastening screw 62 and the stabilizing rod 61 are passed through the inner wall of the fastening hole 51 in sequence until the extension plate 5 and the partition plate 3 abut against each other on the side that are close to each other, and the extension plate 5 and the connecting frame 2 abut against each other on the side that are close to each other. Then the fastening nut 63 is threaded onto the fastening screw 62 until the fastening nut 63 and the extension plate 5 abut against each other on the side that are close to each other, thereby fixing the extension plate 5 to the partition plate 3.

[0042] Embodiment 1 of this application discloses the implementation principle of an ALC plate outer steel structure as follows: The connecting frame 2 is welded to the peripheral wall of the base plate 1, and then the partition plate 3 is welded to the base plate 1; then the fastening screw 62 and the stabilizing rod 61 are passed through the inner wall of the fastening hole 51 in sequence until the side of the extension plate 5 and the partition plate 3 approach each other abut, and the side of the extension plate 5 and the connecting frame 2 approach each other abut; then the fastening nut 63 is threaded onto the fastening screw 62 until the fastening nut 63 and the side of the extension plate 5 approach each other abut, thereby fixing the extension plate 5 to the partition plate 3; then the connecting frame 2 is sleeved on the ALC plate 8, and the partition plate 3 is inserted into the ALC plate 8; finally, the connecting frame 2 is fixed to the ALC plate 8 by the locking member 21, thereby protecting the ALC plate 8 through the whole formed by the connecting frame 2, the base plate 1, the partition plate 3, and the extension plate 5, and extending the service life of the ALC plate 8.

[0043] Example 2

[0044] The difference between Example 2 and Example 1 is as follows:

[0045] Reference Figure 3 and Figure 4A partition plate 3 is slidably connected to the base plate 1. A moving hole 32 is provided on the side of the partition plate 3 away from the base plate 1 along the height direction. A push rod 321 is slidably connected to the inner wall of the moving hole 32 along the length direction. A connecting rod 311 is provided on the side wall of the push rod 321. A connecting groove 31 for the connecting rod 311 to slide is provided inside the partition plate 3 along the length direction. The ends of the connecting rod 311 and the push rod 321 that are close to each other are provided with a chamfer 3111, so that when the push rod 321 moves along the inner wall of the moving hole 32, the connecting rod 311 moves along the inner wall of the connecting groove 31. A number of slots 22 for the ends of the connecting rods 311 to be inserted are provided on the inner wall of the connecting frame 2 along the length direction. A fixing member 4 is provided on the partition plate 3. The fixing member 4 is used to fix the push rod 321 to the partition plate 3.

[0046] Reference Figure 4 The fixing component 4 includes a first connecting rod 41, a first dovetail block 42, a second connecting rod 43, and a first elastic member 44. The side wall of the push rod 321 has a mounting hole 3211. The end of the first connecting rod 41 is hinged to the inner wall of the mounting hole 3211. A first dovetail groove 411 for sliding of the first dovetail block 42 is formed on the side of the first connecting rod 41 near the push rod 321. One end of the first elastic member 44 is welded to the side wall of the first dovetail block 42, and the other end of the first elastic member 44 is welded to... The first elastic element 44 in Embodiment 2 of this application is a spring, attached to the inner wall of the first dovetail groove 411; one end of the second connecting rod 43 is hinged to the side of the first dovetail block 42 away from the first connecting rod 41, and the other end of the second connecting rod 43 is welded to the inner wall of the mounting hole 3211. The partition plate 3 has a fixing groove 33 for inserting the first connecting rod 41. When the first connecting rod 41 is inserted into the inner wall of the fixing groove 33, the included angle between the first connecting rod 41 and the second connecting rod 43 is less than 90 degrees.

[0047] Reference Figure 3 and Figure 4 Once the position of the partition plate 3 on the base plate 1 is determined, the push rod 321 is slid along the length of the inner wall of the moving hole 32 toward one side of the base plate 1. At this time, the guide angle 3111 on the push rod 321 is in contact with the guide angle 3111 on the connecting rod 311; thereby pushing the connecting rod 311 to move along the length of the inner wall of the connecting groove 31 until the end of the connecting rod 311 is inserted into the inner wall of the slot 22 at the corresponding position.

[0048] Reference Figure 3 and Figure 4When the push rod 321 moves along the length of the inner wall of the moving hole 32, the first connecting rod 41 rotates along the inner wall of the mounting hole 3211, and the first dovetail block 42 located on the first connecting rod 41 moves along the length of the inner wall of the first dovetail groove 411, so that the second connecting rod 43 rotates. At this time, the first elastic element 44 rebounds until the first connecting rod 41 is inserted into the inner wall of the fixing groove 33, so as to fix the partition plate 3 on the base plate 1, thereby adjusting the position of the partition plate 3 on the base plate 1, and improving the adaptability of the overall steel structure formed by the partition plate 3, the base plate 1, and the connecting frame 2 to the ALC plate 8.

[0049] Reference Figure 5 and Figure 6 A locking rack 3112 is welded to the side of the connecting rod 311 near the base plate 1. An installation cavity 34 is provided inside the partition plate 3. A rotating tube 7 is rotatably connected to the inner wall of the installation cavity 34 through a bearing. A locking gear 71 is welded to the side wall of the rotating tube 7. The locking gear 71 and the locking rack 3112 mesh with each other. A positioning rod 72 is threadedly connected to the inner wall of the rotating tube 7. A second dovetail block 721 is welded to the end of the positioning rod 72. A second dovetail groove 341 for sliding of the second dovetail block 721 is provided along the length direction of the inner wall of the installation cavity 34. A positioning tube 81 for inserting the end of the positioning rod 72 is pre-embedded on the ALC plate 8. A guide surface 722 for easy insertion into the positioning tube 81 is provided at the end of the positioning rod 72.

[0050] Reference Figure 5 and Figure 6 When the connecting rod 311 moves along the length of the inner wall of the connecting groove 31 under the action of the pushing rod 321, the locking rack 3112 and the locking gear 71 mesh with each other, so that the rotating tube 7 rotates. At this time, the dovetail block connected to the positioning rod 72 moves along the length of the inner wall of the dovetail groove, so as to drive the positioning rod 72 to move along the length of the inner wall of the mounting cavity 34 until the end of the positioning rod 72 is inserted into the positioning tube 81. Thus, when the partition plate 3 is fixed on the connecting frame 2, the ALC plate 8 is simultaneously fixed on the partition plate 3.

[0051] Embodiment 2 of this application discloses the implementation principle of an ALC plate outer steel structure as follows: When the partition plate 3 is inserted into the ALC plate 8, as the partition plate 3 and the ALC plate 8 approach each other and come into contact, the ALC plate 8 pushes the push rod 321 to move along the length of the inner wall of the moving hole 32 toward the side of the bottom plate 1; so that the connecting rod 311 moves along the length of the inner wall of the connecting groove 31. At this time, the locking rack 3112 on the connecting rod 311 drives the locking gear 71 to rotate, so that the rotating tube 7 rotates. At this time, the positioning rod 72 moves along the length of the inner wall of the second dovetail groove 341 under the action of the second dovetail block 721. Thus, when the end of the connecting rod 311 is inserted into the inner wall of the corresponding slot 22, the end of the positioning rod 72 is inserted into the inside of the positioning tube 81. Then, the ALC plate 8 is protected by the whole formed by the connecting frame 2, the bottom plate 1, the partition plate 3, and the extension plate 5, thus extending the service life of the ALC plate 8.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steel cladding structure for an ALC plate, comprising a base plate (1), the base plate (1) being disposed at the bottom of the ALC plate (8), characterized in that: The base plate (1) is provided with a connecting frame (2) that fits against the side wall of the ALC plate (8) and also includes a locking member (21), which is used to fix the connecting frame (2) to the ALC plate (8). A partition plate (3) is provided on the base plate (1), and the partition plate (3) is inserted into the ALC plate (8); A partition plate (3) is provided on the base plate (1). A connecting groove (31) is provided on the side wall of the partition plate (3) along the length direction. A connecting rod (311) is slidably connected to the inner wall of the connecting groove (31) along the length direction. A plurality of slots (22) for inserting the ends of the connecting rods (311) are provided on the inner wall of the connecting frame (2) along the length direction. A moving hole (32) is provided on the side of the partition plate (3) away from the base plate (1) along the width direction. A push rod (321) is slidably connected to the inner wall of the hole (32). The connecting rod (311) and the push rod (321) are both provided with a chamfer (3111) at their respective ends so that when the push rod (321) moves along the inner wall of the moving hole (32), the connecting rod (311) moves along the inner wall of the connecting groove (31). A fixing member (4) is provided on the partition plate (3) for fixing the push rod (321) to the partition plate (3). The fixing member (4) includes a first connecting rod (41), a first dovetail block (42), a second connecting rod (43), and a first elastic member (44). The side wall of the pushing rod (321) has a mounting hole (3211). The end of the first connecting rod (41) is hinged to the inner wall of the mounting hole (3211). A first dovetail groove (411) is provided on the side of the first connecting rod (41) near the connecting rod (311) for the first dovetail block (42) to slide. The first elastic member... One end of the first elastic member (44) is disposed on the side wall of the first dovetail block (42), and the other end of the first elastic member (44) is disposed on the inner wall of the first dovetail groove (411). One end of the second connecting rod (43) is disposed on the side of the first dovetail block (42) away from the first connecting rod (41), and the other end of the second connecting rod (43) is disposed on the inner wall of the mounting hole (3211). The partition plate (3) has a fixing groove (33) for the first connecting rod (41) to be inserted. The connecting rod (311) is provided with a locking rack (3112) on the side near the bottom plate (1). The partition plate (3) has an installation cavity (34) inside. The inner wall of the installation cavity (34) is rotatably connected to a rotating tube (7). The side wall of the rotating tube (7) is provided with a locking gear (71). The locking gear (71) and the locking rack (3112) mesh with each other. The inner wall of the rotating tube (7) is threadedly connected to a positioning rod (72). The end of the positioning rod (72) is provided with a second dovetail block (721). The inner wall of the installation cavity (34) is provided with a second dovetail groove (341) along the length direction for the second dovetail block (721) to slide. The ALC plate (8) is pre-embedded with a positioning tube (81) for the end of the positioning rod (72) to be inserted.

2. The ALC plate external steel structure according to claim 1, characterized in that: Both ends of the partition plate (3) are provided with extension plates (5), the extension plates (5) abut against the side wall of the ALC plate (8), and fasteners (6) are provided between the extension plates (5) and the partition plate (3), the fasteners (6) are used to fix the extension plates (5) to the partition plate (3).

3. The ALC plate outer steel structure according to claim 2, characterized in that: The fastener (6) includes a stabilizing rod (61), a fastening screw (62), and a fastening nut (63). The stabilizing rod (61) is located at one end of the partition plate (3) near the extension plate (5). The fastening screw (62) is located at the end of the stabilizing rod (61) away from the partition plate (3). The side wall of the extension plate (5) has a through-hole (51) through which the fastening screw (62) and the stabilizing rod (61) pass in sequence. The fastening nut (63) is threaded onto the fastening screw (62). The fastening nut (63) and the extension plate (5) abut against each other on the side closest to each other.

4. The ALC plate external steel structure according to claim 1, characterized in that: The end of the positioning rod (72) is provided with a guide surface (722) for easy insertion into the positioning tube (81).

5. The ALC plate outer steel structure according to claim 1, characterized in that: The peripheral wall of the connecting frame (2) is provided with a relief groove (23), and the inner wall of the relief groove (23) is provided with a waterproof pad (231). The waterproof pad (231) and the ALC plate (8) abut against each other on the side that is close to each other.

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