A kind of column aluminum alloy formwork fixing structure for construction engineering

Abstract

The invention relates to a column aluminum alloy formwork fixing structure for construction engineering, belonging to the technical field of construction engineering; the structure comprises two bottom plates, a first formwork is fixed on each of the two bottom plates, the two first formworks are butted together to form a square cylindrical structure, a second formwork is arranged on the outer sides of the two first formworks, a group of sliding mechanisms is arranged between the second formworks and the bottom plates on the same side, the sliding mechanisms drive the second formworks to slide in the vertical direction and the horizontal direction, when the two second formworks slide upwards to the upper ends of the two first formworks respectively, the two second formworks approach each other in the horizontal direction and then butt together to form a square cylindrical structure; two groups of plug-in mechanisms are arranged between the two second formworks, the plug-in mechanisms comprise an embedded plate and an embedded box, when the two second formworks are butt-jointed with each other, the embedded plate is inserted into the embedded box to fix the two second formworks; the problem of complicated procedures, long time and low efficiency in the current installation of aluminum alloy formworks is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering construction, and in particular relates to a column aluminum alloy template fixing structure for building engineering construction. Background Art

[0002] Aluminum alloy formwork, full name is aluminum alloy formwork for concrete engineering, aluminum alloy formwork is mainly made of aluminum alloy profiles, designed and processed according to a certain modulus, suitable for concrete engineering formwork system, is a new generation of formwork system after a variety of traditional formwork systems. It is mainly made of aluminum alloy profiles, through mechanical processing and welding processes, has a series of unique advantages and a wide range of applications, aluminum alloy formwork is widely used, including various high-rise residential buildings, public buildings, commercial real estate and other fields, and plays a significant role in housing construction.

[0003] In the construction of houses, concrete columns are often used to support beams. When making columns, aluminum alloy formwork is required to cooperate with the pouring of concrete. When installing aluminum alloy formwork before making concrete columns, the traditional method is still to manually install the aluminum alloy formwork, and the volume and length of the column are relatively large during production, so an aluminum alloy formwork of a suitable length is required to cooperate. This results in that when installing the aluminum alloy formwork, it is extremely inconvenient for workers to install it due to its large volume and length. It is necessary to use a crane for installation, and multiple aluminum alloy formworks need to be installed at the same time, which makes the installation of the aluminum alloy formwork take a long time and is inefficient. Corresponding problems will also occur when the used aluminum alloy formwork is disassembled.

[0004] For this reason, we propose a column aluminum alloy formwork fixing structure for construction engineering construction. Summary of the invention

[0005] The invention overcomes the shortcomings of the prior art and provides a column aluminum alloy formwork fixing structure for construction engineering; it solves the problems of complicated procedures, long time and low efficiency in the current installation of aluminum alloy formwork.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0007] A column aluminum alloy formwork fixing structure for construction engineering, comprising two base plates, on which a vertical L-shaped first formwork is fixedly arranged respectively, the two first formworks are butted together to form a vertical square cylindrical structure, a vertical L-shaped second formwork is arranged on the outer sides of the two first formworks respectively, a group of sliding mechanisms is arranged between the second formworks and the base plates located on the same side, the second formworks are driven to slide in the vertical and horizontal directions by the sliding mechanisms, when the two second formworks slide vertically upwards to the upper ends of the two first formworks respectively, the two second formworks approach each other in the horizontal direction and then butt together to form a vertical square cylindrical structure; a group of plug-in mechanisms are respectively arranged between the two ends of the two second formworks butted together, a group of plug-in mechanisms comprises an embedded plate and an embedded box, when the two second formworks are butt-jointed with each other, the embedded plate is inserted into the embedded box, thereby fixing and connecting the two second formworks.

[0008] Furthermore, the first template includes two vertical first area plates that are fixedly connected, and the lengths and heights of the two first area plates are kept equal.

[0009] Furthermore, the second template includes two vertical second area plates that are fixedly connected, and the lengths and heights of the two second area plates are kept equal; the lengths and heights of the second area plates are also kept equal to the lengths and heights of the first area plates, and the two second templates are respectively arranged on the outsides of the two first templates, and the inner sides of the two second area plates of the second templates are respectively in sliding contact with the outer sides of the two first area plates of the corresponding first templates.

[0010] Furthermore, the sliding mechanism includes a guide rod, a first sliding rod, a connecting block, a connecting rod, a connecting plate, a hydraulic motor, a second sliding rod, a hydraulic rod, and a roller; a guide rod is fixedly arranged on the upper end surface of the base plate, the guide rod includes a vertical section and a horizontal section, the lower end of the vertical section of the guide rod is fixedly connected to the upper end surface of the base plate, the upper end of the vertical section of the guide rod is fixedly connected to one end of the horizontal section of the guide rod, a first sliding groove is arranged inside the guide rod, and the first sliding groove is connected to both side end surfaces of the guide rod; the first sliding groove includes a vertical section and a horizontal section, the upper end of the vertical section of the first sliding groove is connected to one end of the horizontal section of the first sliding groove; wherein the vertical section of the first sliding groove is located inside the vertical section of the guide rod, and the horizontal section of the first sliding groove is located inside the horizontal section of the guide rod.

[0011] Furthermore, a horizontal first sliding rod is slidably arranged inside the first sliding groove of the guide rod, a connecting block is fixedly arranged at both ends of the first sliding rod, an arc-shaped connecting rod is fixedly arranged at one end of the two connecting blocks away from the first sliding rod, a vertical connecting plate is fixedly arranged at one end of each connecting rod away from the connecting block, and the two connecting plates are fixedly connected to the outer side surfaces of the two second area plates of the corresponding second template.

[0012] Furthermore, a second sliding groove is arranged on the side wall of the first sliding groove of the guide rod away from the second template, the second sliding groove includes a vertical section and a horizontal section, the upper end of the vertical section of the second sliding groove is connected with one end of the horizontal section of the second sliding groove, wherein the vertical section of the second sliding groove is located at the vertical section of the guide rod, and the horizontal section of the second sliding groove is located at the horizontal section of the guide rod; a second sliding rod is slidably arranged inside the second sliding groove, the second sliding rod is perpendicular to the first sliding rod, and one end of the second sliding rod is rotatably connected to the first sliding rod.

[0013] Furthermore, a hydraulic motor is fixedly arranged at the lower end of the end surface of the guide rod away from the corresponding second template, and a hydraulic rod is fixedly arranged at the output end of the hydraulic motor, and the piston rod of the hydraulic rod is vertically upward; a roller is rotatably arranged at the end of the piston rod of the hydraulic rod, and the roller is hinged to the end of the second sliding rod away from the first sliding rod.

[0014] Furthermore, the plug-in mechanism also includes a first positioning plate and a second positioning plate, wherein the first positioning plate is fixedly arranged at the end of one of the second templates, and the second positioning plate is fixedly arranged at the end of the other second template; the embedded plate is fixedly arranged on the first positioning plate, and the embedded box is fixedly arranged on the second positioning plate.

[0015] Furthermore, an arc-shaped protrusion made of rubber material is fixedly arranged on the outer side surface of the embedded plate.

[0016] Furthermore, a rotating rod is rotatably arranged on the side wall of the embedded box, and a damping structure is arranged at the connection between the two ends of the rotating rod and the embedded box; two symmetrical clamping plates are fixedly arranged on the outer cylindrical surface of the rotating rod, one of which is located on the inner side of the embedded box, and the other is located on the outer side of the embedded box.

[0017] The beneficial effects of the present invention compared with the prior art are as follows:

[0018] When the two second templates need to be fitted and connected, the hydraulic motor is started, and the hydraulic motor outputs power to the hydraulic rod. When the hydraulic rod moves upward, it drives the roller upward together. When the roller moves upward, it drives the second sliding rod upward, and the second sliding rod slides in the second sliding groove. When the second sliding rod moves, it drives the first sliding rod to move together. The first sliding rod cooperates with the first sliding groove in the guide rod and moves upward in the first sliding groove. When the first sliding rod moves upward, it drives the connecting block and the connecting rod upward together. The connecting rod moves upward, drives the connecting plate and the second template upward until the two second templates are completely fitted and connected, thereby avoiding the problem of difficulty in installing and disassembling the aluminum alloy template. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings:

[0020] Figure 1 It is a three-dimensional schematic diagram of the present invention as a whole Figure 1 ;

[0021] Figure 2 It is a three-dimensional schematic diagram of the present invention as a whole Figure 2 ;

[0022] Figure 3 It is a three-dimensional schematic diagram of the present invention as a whole Figure 3 ;

[0023] Figure 4 It is a three-dimensional schematic diagram of the sliding mechanism;

[0024] Figure 5 is a schematic diagram of the connection between the two second templates and the plug-in mechanism;

[0025] Figure 6 yes Figure 5 A local enlarged schematic diagram of the middle A;

[0026] Among them, 1 is a base plate, 2 is a first template, 3 is a second template, 4 is a guide rod, 5 is a first sliding groove, 6 is a first sliding rod, 7 is a connecting block, 8 is a connecting rod, 9 is a connecting plate, 10 is a hydraulic motor, 11 is a second sliding groove, 12 is a second sliding rod, 13 is a hydraulic rod, 14 is a roller, 15 is a first positioning plate, 16 is an embedded plate, 17 is an arc-shaped protrusion, 18 is a second positioning plate, 19 is an embedded box, 20 is a rotating rod, and 21 is a clamping plate. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0028] like Figure 1As shown in FIG. 6 , the present invention provides a fixing structure of column aluminum alloy formwork for construction engineering, comprising two base plates 1, on which a vertical L-shaped first formwork 2 is fixedly arranged respectively, and the two first formworks 2 are butt-jointed to form a vertical square cylindrical structure, and a vertical L-shaped second formwork 3 is respectively arranged on the outer sides of the two first formworks 2, and a group of sliding mechanisms are arranged between the second formwork 3 and the base plate 1 on the same side, and the second formwork 3 is driven to slide in the vertical and horizontal directions by the sliding mechanisms, and when the two second formworks 3 slide vertically upward to the upper ends of the two first formworks 2 respectively, the two second formworks 3 approach each other in the horizontal direction and then butt-jointed to form a vertical square cylindrical structure; a group of plug-in mechanisms are respectively arranged between the two ends of the two second formworks 3 butt-jointed to each other, and a group of plug-in mechanisms include an embedded plate 16 and an embedded box 19, and when the two second formworks 3 are butt-jointed to each other, the embedded plate 16 is inserted into the embedded box 19, so that the two second formworks 3 are fixedly connected.

[0029] The bottom plate 1 is a horizontally arranged plate-like structure, and an L-shaped groove is respectively arranged on the side where the two bottom plates 1 are close to each other, and the two first templates 2 are respectively fixedly arranged at the L-shaped grooves of the two bottom plates 1. The first template 2 includes two vertical first area plates, the lengths and heights of the two first area plates are kept equal, the two first area plates are perpendicular to each other, and the two first area plates are fixedly connected. The two first templates 2 are fixedly spliced ​​to each other, so that the two first templates 2 are spliced ​​into a vertical square cylindrical structure.

[0030] The second template 3 includes two vertical second area plates, the lengths and heights of the two second area plates are equal, the two second area plates are perpendicular to each other, and the two second area plates are fixedly connected to each other. The length and height of the second area plates are also equal to the length and height of the first area plates. The two second templates 3 are respectively arranged on the outside of the two first templates 2, and the inner side surfaces of the two second area plates of the second template 3 are respectively in sliding contact with the outer side surfaces of the two first area plates of the corresponding first template 2.

[0031] The sliding mechanism includes a guide rod 4 , a first sliding rod 6 , a connecting block 7 , a connecting rod 8 , a connecting plate 9 , a hydraulic motor 10 , a second sliding rod 12 , a hydraulic rod 13 , and a roller 14 .

[0032] A guide rod 4 is fixedly arranged on the upper end surface of the bottom plate 1, and the guide rod 4 is arranged outside the connection between the two second area plates of the corresponding second template 3; the guide rod 4 includes a vertical section and a horizontal section, the lower end of the vertical section is fixedly connected to the upper end surface of the bottom plate 1, the upper end of the vertical section is fixedly connected to one end of the horizontal section, and the extension direction of the horizontal section is perpendicular to the horizontal connection between the upper ends of the edges of the two second area plates of the second template 3 that are away from each other. A first sliding groove 5 is arranged inside the guide rod 4, and the first sliding groove 5 is connected to the two side end surfaces of the guide rod 4; the first sliding groove 5 includes a vertical section and a horizontal section, and the upper end of the vertical section is connected to one end of the horizontal section; wherein the vertical section of the first sliding groove 5 is located inside the vertical section of the guide rod 4, and the horizontal section of the first sliding groove 5 is located inside the horizontal section of the guide rod 4.

[0033] A horizontal first sliding rod 6 is slidably arranged inside the first sliding groove 5 of the guide rod 4, and the axial direction of the first sliding rod 6 is perpendicular to the extension direction of the horizontal section of the guide rod 4. A connecting block 7 is fixedly arranged at both ends of the first sliding rod 6, and the two connecting blocks 7 are respectively in sliding contact with the two side end faces of the guide rod 4, and the outer diameter of the connecting block 7 is larger than the inner width of the first sliding groove 5, so that the first sliding rod 6 can slide stably inside the first sliding groove 5. An arc-shaped connecting rod 8 is fixedly arranged at one end of the two connecting blocks 7 away from the first sliding rod 6, and a vertical connecting plate 9 is fixedly arranged at one end of each connecting rod 8 away from the connecting block 7, and the two connecting plates 9 are respectively fixedly connected to the outer side surfaces of the two second area plates of the corresponding second template 3. When the first sliding rod 6 slides inside the first sliding groove 5, the second template 3 slides synchronously with the first sliding rod 6 through the connecting plate 9, the connecting rod 8, and the connecting block 7.

[0034] A second sliding groove 11 is provided on the side wall of the first sliding groove 5 of the guide rod 4 away from the second template 3. The second sliding groove 11 includes a vertical section and a horizontal section. The upper end of the vertical section is connected to one end of the horizontal section. The vertical section of the second sliding groove 11 is located at the vertical section of the guide rod 4, and the horizontal section of the second sliding groove 11 is located at the horizontal section of the guide rod 4. A second sliding rod 12 is slidably provided inside the second sliding groove 11. The second sliding rod 12 is perpendicular to the first sliding rod 6, and one end of the second sliding rod 12 is rotatably connected to the first sliding rod 6.

[0035] A hydraulic motor 10 is fixedly arranged at the lower end of the end surface of the guide rod 4 away from the corresponding second template 3, and a hydraulic rod 13 is fixedly arranged at the output end of the hydraulic motor 10, and the piston rod of the hydraulic rod 13 is vertically upward. A roller 14 is rotatably arranged at the end of the piston rod of the hydraulic rod 13, and the roller 14 is hinged to the end of the second sliding rod 12 away from the first sliding rod 6.

[0036] The plug-in mechanism also includes a first positioning plate 15 and a second positioning plate 18, wherein the first positioning plate 15 is fixedly arranged at the end of one of the second templates 3, and the second positioning plate 18 is fixedly arranged at the end of the other second template 3. The embedded plate 16 is fixedly arranged on the first positioning plate 15, and the embedded box 19 is fixedly arranged on the second positioning plate 18, and the embedded plate 16 and the embedded box 19 are both perpendicular to the horizontal connection between the upper ends of the edges of the two second area plates of the second template 3 that are away from each other. A curved protrusion 17 made of rubber material is fixedly arranged on the outer surface of the embedded plate 16. A rotating rod 20 is rotatably arranged on the side wall of the embedded box 19, and a damping structure is arranged at the connection between the two ends of the rotating rod 20 and the embedded box 19; two symmetrical card plates 21 are fixedly arranged on the outer cylindrical surface of the rotating rod 20, one of which is located on the inner side of the embedded box 19, and the other card plate 21 is located on the outer side of the embedded box 19.

[0037] The working principle of the present invention is:

[0038] First, the two bottom plates 1 need to be placed at the position where they are needed, so that the two first templates 2 are fitted and connected. When the two second templates 3 need to be fitted and connected, the hydraulic motor 10 is started, and the hydraulic motor 10 runs and outputs power to the hydraulic rod 13. The piston rod of the hydraulic rod 13 extends upward to drive the roller 14 to move upward together. When the roller 14 moves upward, it drives the second sliding rod 12 to move upward inside the vertical section of the second sliding groove 11. The second sliding rod 12 drives the first sliding rod 6 to move upward inside the vertical section of the first sliding groove 5. When the first sliding rod 6 moves upward, it drives the connecting block 7 and the connecting rod 8 to move upward together. When the connecting rod 8 moves upward, it drives the connecting plate 9 and the second template 3 to move upward until the two second templates 3 are moved upward to the upper ends of the two first templates 2. At this time, the two second templates 3 have not yet been docked, and at this time, the first sliding rod 6 slides to the intersection of the vertical section and the horizontal section of the first sliding groove 5.

[0039] Then, the piston rod of the hydraulic rod 13 is controlled to continue to extend upward, and the second sliding rod 12 continues to move upward under the action of the hydraulic rod 13. Under the action of the second sliding rod 12, the first sliding rod 6 is pushed into the horizontal section of the first sliding groove 5. The first sliding rod 6 drives the two second templates 3 to slide horizontally in a direction approaching each other through the connecting block 7, the connecting rod 8, and the connecting plate 9, so that the two second templates 3 are docked with each other.

[0040] When the two second templates 3 approach each other, the corresponding first positioning plates 15 and second positioning plates 18 are driven to approach each other, and the first positioning plates 15 and second positioning plates 18 respectively drive the corresponding embedded plates 16 and embedded boxes 19 to approach each other until the embedded plates 16 are inserted into the embedded boxes 19. During the process of the embedded plates 16 being inserted into the embedded boxes 19, the arc-shaped protrusions 17 on the embedded plates 16 squeeze the card plates 21 inside the embedded boxes 19, and the card plates 21 outside the embedded boxes 19 are rotated and displaced through the cooperation of the rotating rods 20, thereby realizing the observation and monitoring of the complete closure of the two second templates 3.

[0041] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A column aluminum alloy formwork fixing structure for construction engineering, characterized by: The invention comprises two bottom plates (1), on each of which a vertical L-shaped first template (2) is fixedly arranged, the two first templates (2) are butt-jointed to form a vertical square cylindrical structure, a vertical L-shaped second template (3) is arranged outside each of the two first templates (2), and a set of sliding mechanisms is arranged between the second template (3) and the bottom plate (1) on the same side, and the sliding mechanisms are used to drive the second template (3) to slide in the vertical direction and the horizontal direction. When the two second templates (3) are separated, After sliding vertically upward to the upper ends of the two first templates (2), the two second templates (3) approach each other in the horizontal direction and then dock to form a vertical square cylindrical structure; a group of plug-in mechanisms are respectively provided between the two ends of the two second templates (3) docked with each other, and the group of plug-in mechanisms includes an embedded plate (16) and an embedded box (19). When the two second templates (3) are docked with each other, the embedded plate (16) is inserted into the embedded box (19), thereby fixing the two second templates (3) together; The sliding mechanism comprises a guide rod (4), a first sliding rod (6), a connecting block (7), a connecting rod (8), a connecting plate (9), a hydraulic motor (10), a second sliding rod (12), a hydraulic rod (13), and a roller (14); a guide rod (4) is fixedly arranged on the upper end surface of the bottom plate (1), and the guide rod (4) comprises a vertical section and a horizontal section, the lower end of the vertical section of the guide rod (4) is fixedly connected to the upper end surface of the bottom plate (1), and the upper end of the vertical section of the guide rod (4) is fixedly connected to the upper end surface of the bottom plate (1). ), a first sliding groove (5) is arranged inside the guide rod (4), the first sliding groove (5) is in communication with both side end surfaces of the guide rod (4); the first sliding groove (5) comprises a vertical section and a horizontal section, the upper end of the vertical section of the first sliding groove (5) is in communication with one end of the horizontal section of the first sliding groove (5); the vertical section of the first sliding groove (5) is located inside the vertical section of the guide rod (4), and the horizontal section of the first sliding groove (5) is located inside the horizontal section of the guide rod (4); A horizontal first sliding rod (6) is slidably arranged inside the first sliding groove (5) of the guide rod (4), a connecting block (7) is fixedly arranged at each end of the first sliding rod (6), an arc-shaped connecting rod (8) is fixedly arranged at each end of the two connecting blocks (7) away from the first sliding rod (6), and a vertical connecting plate (9) is fixedly arranged at each end of each connecting rod (8) away from the connecting block (7), and the two connecting plates (9) are fixedly connected to the outer side surfaces of the two second area plates of the corresponding second template (3).

2. The fixing structure of the column aluminum alloy formwork for construction engineering according to claim 1 is characterized by: The first template (2) comprises two vertical first area plates which are fixedly connected to each other, and the lengths and heights of the two first area plates are kept equal.

3. The fixing structure of the column aluminum alloy formwork for construction engineering according to claim 2 is characterized by: The second template (3) comprises two vertical second area plates which are fixedly connected, the lengths and heights of the two second area plates being equal; the lengths and heights of the second area plates being equal to the lengths and heights of the first area plates; the two second templates (3) are respectively arranged on the outsides of the two first templates (2); the inner side surfaces of the two second area plates of the second template (3) are respectively in sliding contact with the outer side surfaces of the two first area plates of the corresponding first template (2).

4. The aluminum alloy formwork fixing structure for construction columns according to claim 1 is characterized in that: A second sliding groove (11) is arranged on a side wall of the first sliding groove (5) of the guide rod (4) away from the second template (3), the second sliding groove (11) comprising a vertical section and a horizontal section, the upper end of the vertical section of the second sliding groove (11) being connected to one end of the horizontal section of the second sliding groove (11), wherein the vertical section of the second sliding groove (11) is located at the vertical section of the guide rod (4), and the horizontal section of the second sliding groove (11) is located at the horizontal section of the guide rod (4); a second sliding rod (12) is slidably arranged inside the second sliding groove (11), the second sliding rod (12) is perpendicular to the first sliding rod (6), and one end of the second sliding rod (12) is rotatably connected to the first sliding rod (6).

5. The fixing structure of the column aluminum alloy formwork for construction engineering according to claim 4 is characterized by: A hydraulic motor (10) is fixedly arranged at the lower end of the end surface of the guide rod (4) away from the corresponding second template (3), and a hydraulic rod (13) is fixedly arranged at the output end of the hydraulic motor (10), and the piston rod of the hydraulic rod (13) is vertically upward; a roller (14) is rotatably arranged at the end of the piston rod of the hydraulic rod (13), and the roller (14) is hinged to the end of the second sliding rod (12) away from the first sliding rod (6).

6. The fixing structure of the column aluminum alloy formwork for construction engineering according to claim 1 is characterized by: The plug-in mechanism further comprises a first positioning plate (15) and a second positioning plate (18), wherein the first positioning plate (15) is fixedly arranged at the end of one of the second templates (3), and the second positioning plate (18) is fixedly arranged at the end of the other second template (3); the embedding plate (16) is fixedly arranged on the first positioning plate (15), and the embedding box (19) is fixedly arranged on the second positioning plate (18).

7. The fixing structure of the column aluminum alloy formwork for construction engineering according to claim 6 is characterized by: An arc-shaped protrusion (17) made of rubber material is fixedly arranged on the outer side surface of the embedded plate (16).

8. The aluminum alloy formwork fixing structure for building construction according to claim 6 is characterized by: A rotating rod (20) is rotatably arranged on the side wall of the embedded box (19), and damping structures are arranged at the connection points between the two ends of the rotating rod (20) and the embedded box (19); two symmetrical clamping plates (21) are fixedly arranged on the outer cylindrical surface of the rotating rod (20), one of which is located on the inner side of the embedded box (19) and the other is located on the outer side of the embedded box (19).

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