Reinforcement cage butt joint device

Abstract

The utility model discloses a steel reinforcement cage butt joint device which comprises a grabbing recovery device, a shell, a calibration device, a butt joint fixator and a support. A support is arranged on the lower side of the butt joint fixator, and shells are arranged on the two faces opposite to the reinforcement cage. The grabbing recovery devices are arranged on the shell and used for grabbing main reinforcements of the upper reinforcement cage and the lower reinforcement cage and conducting shape correction. A plurality of calibration devices are arranged on the two faces, opposite to the reinforcement cages, of the butt joint fixator and used for calibrating the positions of main reinforcements of the upper reinforcement cage and the lower reinforcement cage; the grabbing recovery device can grab the main reinforcements of the upper reinforcement cage and the lower reinforcement cage for shape correction, so that the end parts of the main reinforcements of the upper reinforcement cage and the lower reinforcement cage can be opposite to the main reinforcement insertion holes and are connected with each other after being inserted into the main reinforcement insertion holes; according to the device, the positions of main reinforcements of the upper reinforcement cage and the lower reinforcement cage can be calibrated, the butt joint fixator is provided with the shell capable of surrounding the main reinforcements of the reinforcement cages, the grabbing recovery device is arranged, the main reinforcements of the reinforcement cages can be pulled, the deformed reinforcement cages can be calibrated, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of rebar cage technology, and in particular to a rebar cage docking device. Background Technology

[0002] In construction sites, the reinforcing steel cages, due to their substantial weight, can deform at the joints if left unattended for extended periods or improperly protected during transport, thus affecting the connection between cages. Workers often need to use wrenches or pliers to tap and manipulate the deformed steel bars to correct them before connection can proceed. However, this method is not only time-consuming but also extremely labor-intensive, significantly impacting construction efficiency. Summary of the Invention

[0003] This utility model provides a rebar cage docking device to overcome the technical problem that manual correction of deformed rebar cages is time-consuming, labor-intensive, and affects construction efficiency.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A rebar cage docking device includes: a gripping and recovery device, a housing, a calibration device, a docking fixer, and a support.

[0006] The bracket is provided on the lower side of the docking fixture; the outer shell is provided on both sides of the docking fixture opposite to the rebar cage; multiple gripping and recovery devices are provided on the outer shell for gripping the main bars of the upper and lower rebar cages and performing shape correction; multiple calibration devices are provided on both sides of the docking fixture opposite to the rebar cage for calibrating the position of the main bars of the upper and lower rebar cages; the docking fixture is provided with a main bar insertion hole, and the gripping and recovery device can grip the main bars of the upper and lower rebar cages for shape correction, so that the ends of the main bars of the upper and lower rebar cages can be aligned with the main bar insertion hole and inserted into the main bar insertion hole for interconnection.

[0007] Furthermore, the docking fastener includes a rotating device, a mounting plate, and a reinforcing bar connecting sleeve;

[0008] The two mounting plates are arranged opposite each other, and one end of the two mounting plates is hinged by the rotating device. The two mounting plates can be opened and closed in a direction perpendicular to the main reinforcement of the steel cage by the rotating device.

[0009] Both ends of the docking fastener are provided with sleeve operating ports. The two mounting plates are provided with main reinforcement insertion holes that pass through the upper and lower surfaces. The main reinforcement insertion holes are located on the side where the two mounting plates are in contact with each other. The main reinforcement insertion holes are connected to the sleeve operating ports to form upper main reinforcement insertion holes and lower main reinforcement insertion holes. A sleeve fixing groove is provided at the end of the upper main reinforcement insertion hole and the lower main reinforcement insertion hole near the sleeve operating port. The rebar connecting sleeve is placed in the sleeve operating port and both ends are located in the sleeve fixing groove, for connecting the ends of the main reinforcement bars of the upper and lower rebar cages inserted into the main reinforcement insertion holes.

[0010] Furthermore, the docking fixture also includes a handle and a locking device;

[0011] Each of the two mounting plates has a handle at the other end opposite to the rotating device. The handle has a locking hole, and the locking device can be inserted into or removed from the locking hole to lock or release the two mounting plates.

[0012] Furthermore, the gripping and recovery device includes an electrically telescopic push rod and a gripping hook;

[0013] The electric telescopic push rod is fixed to the outer shell; the top of the electric telescopic push rod is provided with a hook, and the electric telescopic push rod can drive the hook to move radially to calibrate the main reinforcement of the deformed steel cage.

[0014] Furthermore, the gripper is a unidirectional retracting gripper.

[0015] Furthermore, it also includes a fixing plate. A fixing plate is provided in the middle of both sides of the docking fixture opposite to the steel cage, and the fixing plate is provided with a gripping and recovery device, which is opposite to the gripping and recovery device on the outer shell.

[0016] Furthermore, it also includes connecting plates;

[0017] Connecting plates are provided on both sides of the docking fixture and at the top of the bracket. The connecting plates on the bracket are fixedly connected to the connecting plates on both sides of the docking fixture by bolts.

[0018] Furthermore, the rotating device is a hinge.

[0019] Furthermore, the calibration device is a laser calibrator.

[0020] Furthermore, the laser calibrators are arranged in pairs, one on each side, on the outer side of the upper and lower ends of the main rib insertion hole.

[0021] Beneficial effects: This utility model provides a rebar cage docking device. By designing a docking fixture to fix the rebar cage, multiple calibration devices are set on the docking fixture to calibrate the position of the main bars of the upper and lower rebar cages. The docking fixture is provided with a shell that can surround the main bars of the rebar cage, and a gripping and restoring device is provided on the shell to pull the main bars of the rebar cage and correct the deformed rebar cage, thereby improving construction efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A cross-sectional view of a rebar cage docking device provided by this utility model;

[0024] Figure 2 A top view of a rebar cage docking device provided by this utility model;

[0025] Figure 3 A cross-sectional view of the docking fastener provided by this utility model;

[0026] Figure 4 A top view of the docking fastener provided by this utility model in the closed state;

[0027] Figure 5 A top view of the docking fastener provided by this utility model in the open state;

[0028] Figure 6 This is a structural diagram of one embodiment of the locking device of this utility model;

[0029] Figure 7 Structural diagram of the electric telescopic push rod and grab hook provided by this utility model;

[0030] In the diagram, 5 is the reinforcing cage; 31 is the outer shell; 32 is the electric telescopic push rod; 33 is the grab hook; 34 is the fixing plate; 35 is the calibration device; 36 is the docking fixer; 37 is the reinforcing bar connecting sleeve; 38 is the bracket; 361 is the handle; 362 is the rotating device; 363 is the locking device; 364 is the mounting plate; 365 is the sleeve operating port; 366 is the main reinforcement insertion hole; 367 is the sleeve fixing groove; 381 is the connecting plate; 3661 is the upper main reinforcement insertion hole; 3662 is the lower main reinforcement insertion hole; and 3611 is the lock hole. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] This embodiment provides a rebar cage splicing device, such as Figure 1 As shown, it includes: a gripping and recovery device, a housing 31, a calibration device 35, a docking fixture 36, and a bracket 38;

[0033] The bracket 38 is provided on the lower side of the docking fixture 36; the outer shell 31 is provided on both sides of the docking fixture 36 opposite to the reinforcing cage 5; a plurality of gripping and restoring devices are provided on the outer shell 31 for gripping the main bars of the upper and lower reinforcing cages 5 and performing shape correction; a plurality of calibration devices 35 are provided on both sides of the docking fixture 36 opposite to the reinforcing cage 5 for calibrating the position of the main bars of the upper and lower reinforcing cages 5; a main bar insertion hole 366 is provided on the docking fixture 36, and the gripping and restoring device can grip the main bars of the upper and lower reinforcing cages 5 for shape correction, so that the ends of the main bars of the upper and lower reinforcing cages 5 can be aligned with the main bar insertion hole 366 and inserted into the main bar insertion hole 366 for interconnection.

[0034] Specifically, this device connects the reinforcing cage inside and above the foundation pit. The lower reinforcing cage is provided in the foundation pit. In this embodiment, the support has four legs to support the docking fixture at the foundation pit port at the upper end of the foundation pit. The docking fixture has a shell on both sides facing the upper and lower reinforcing cages. The shells are respectively located at the edges of the short sides at the upper and lower ends of the docking fixture. Four shells are provided on one side, for a total of eight shells. The shells have a longitudinal section of arc shape and are fixedly connected to the docking fixture.

[0035] Each outer shell is fixed with a gripping and restoring device, which can grip the main bars of the upper and lower steel cages and bring them close to the two ends of the docking fixture for shape correction. The docking fixture is equipped with multiple calibration devices on the two sides opposite to the upper and lower steel cages, which can calibrate the position of the main bars of the upper and lower steel cages. The docking fixture is provided with main bar insertion holes. The gripping and restoring device can grip the main bars of the upper and lower steel cages and restore the deformed main bars according to the standard of the calibration device, so that the main bars can be aligned with the main bar insertion holes and inserted into the main bar insertion holes for interconnection.

[0036] In a specific embodiment, such as Figure 1 and 2As shown, it also includes a connecting plate 381; connecting plates 381 are provided on both sides of the docking fixture 36 and at the top of the bracket 38, and the connecting plates 381 on the bracket 38 are fixedly connected to the connecting plates 381 on both sides of the docking fixture 36 by bolts.

[0037] Specifically, the four legs of the bracket are paired up, and a connecting plate is provided on both sides of the docking fixture and at the top of each pair of legs. The connecting plate has six screw holes, and six bolts pass through the screw holes to fix the connecting plate on the docking fixture to the connecting plate on the bracket, thus supporting the docking fixture at the pit port at the upper end of the pit.

[0038] In this embodiment, a connecting plate is provided to connect the bracket and the docking fixture, which can fix the docking fixture above the foundation pit, making it convenient to correct the main reinforcement bars of the steel cage in the foundation pit, while achieving stable support.

[0039] In a specific embodiment, such as Figure 3 , Figure 4 and Figure 5 As shown, the docking fastener 36 includes a rotating device 362, a mounting plate 364, and a steel bar connecting sleeve 37;

[0040] The two mounting plates 364 are arranged opposite to each other, and one end of the two mounting plates 364 is hinged by the rotating device 362. The two mounting plates 364 can be opened and closed in a direction perpendicular to the main reinforcement of the steel cage 5 by the rotating device 362.

[0041] Both ends of the docking fastener 36 are provided with sleeve operating ports 365. The two mounting plates 364 are provided with main reinforcement insertion holes 366 that pass through the upper and lower surfaces. The main reinforcement insertion holes 366 are located on the side where the two mounting plates 364 are in contact with each other. The main reinforcement insertion holes 366 and the sleeve operating ports 365 are connected to form an upper main reinforcement insertion hole 3661 and a lower main reinforcement insertion hole 3662. A sleeve fixing groove 367 is provided at one end of the upper main reinforcement insertion hole 3661 and the lower main reinforcement insertion hole 3662 near the sleeve operating port 365. The steel bar connecting sleeve 37 is placed in the sleeve operating port 365 and both ends are located in the sleeve fixing groove 367. It is used to connect the ends of the main reinforcement bars of the upper and lower steel cages 5 inserted into the main reinforcement insertion holes.

[0042] In a specific implementation, the docking fixture 36 also includes a handle 361 and a locking device 363;

[0043] Each of the two mounting plates 364 is provided with a handle 361 at the other end opposite to the rotating device 362. A lock hole 3611 is provided on the handle 361. The locking device 363 can be inserted into or removed from the lock hole 3611 to lock or loosen the two mounting plates 364.

[0044] Specifically, such as Figure 3 and Figure 4 As shown, the docking fastener consists of two mounting plates, with outer shells on both the top and bottom sides of each plate. Each side has four outer shells, for a total of eight. Figure 5 As shown, the two mounting plates are arranged opposite each other, each with a handle at one end and hinged at the other end via a rotating device. The two mounting plates open and close in a direction perpendicular to the main reinforcement bars of the steel cage via the two handles and the rotating device. The locking device can be inserted into or removed from the lock hole of the handle to lock or release the two mounting plates. Figure 6 As shown, in this embodiment, the locking device is a U-shaped hook;

[0045] like Figure 4 As shown, each end of the mounting plate has a sleeve operating port, and two through-holes for inserting main reinforcing bars are provided on the two mounting plates. These holes are located on the side where the two mounting plates contact each other, and each hole is semi-circular. When the two mounting plates are closed, they form a complete circular insertion hole for the main reinforcing bars. The two insertion holes communicate with the sleeve operating ports at both ends. The sleeve operating ports are located in the middle of both ends of the mounting plates, dividing the insertion hole into upper and lower sections. A sleeve fixing groove is provided at the end of the upper and lower insertion holes near the sleeve operating ports. The reinforcing bar connecting sleeve is placed inside the sleeve operating port with both ends located in the sleeve fixing groove. The diameter of the reinforcing bar connecting sleeve is larger than that of the main reinforcing bar. The diameter of the insertion hole is such that the rebar connecting sleeve is located at the center of the main rebar insertion hole, and its length is less than the length of the main rebar insertion hole. Simultaneously, the diameter of the rebar connecting sleeve is greater than the diameter of the main rebar insertion hole. The diameter of the main rebar insertion hole is greater than the diameter of the main rebar in the rebar cage. When using the rebar connecting sleeve to connect the main rebars of the upper and lower rebar cages, the main rebars can enter the insertion hole, facilitating alignment of the main rebars in the upper and lower rebar cages. The diameter of the rebar connecting sleeve is greater than the diameter of the main rebar insertion hole but less than the diameter of the sleeve fixing groove, ensuring the stability of the rebar connecting sleeve and preventing it from falling due to gravity. An operating port is provided on the sleeve, allowing operators to insert their arms into the operating port while the docking fixture is closed to adjust the rebar connecting sleeve and connect it to the main rebars of the upper and lower rebar cages.

[0046] In this embodiment, a docking fixer is provided, and a steel bar connecting sleeve is provided in the docking fixer, which can fix the position of the calibrated deformed steel cage and align the positions of the main bars of the upper and lower steel cages.

[0047] In a specific embodiment, the rotating device 362 is a hinge.

[0048] Specifically, in this embodiment, there are two hinges, located on both sides of the sleeve operating port, which hinge the two mounting plates together; the hinges drive the docking fixation device to open and close around the main reinforcement of the steel cage.

[0049] After the steel cage is connected, the butt fixing device can be opened to both sides of the steel cage using hinges, and the butt fixing device can be removed from the main reinforcement of the steel cage.

[0050] In a specific embodiment, such as Figure 1 As shown, it also includes a fixing plate 34. The fixing plate 34 is provided in the middle of the upper and lower sides of the docking fixture 36, which is opposite to the outer shell 31. The fixing plate 34 is provided with a gripping and recovery device, which is opposite to the gripping and recovery device on the outer shell 31.

[0051] In this embodiment, a fixing plate is provided, and a gripping and recovery device is provided on the fixing plate. This device works together with the gripping and recovery device on the outer shell to calibrate the shape of the main reinforcement bars of the steel cage, so that the ends of the main reinforcement bars can be aligned with the main reinforcement bar insertion holes and inserted into the main reinforcement bar insertion holes for connection.

[0052] In a specific embodiment, such as Figure 7 As shown, the grasping and recovery device includes an electric telescopic push rod 32 and a gripping hook 33, wherein the gripping hook 33 is a one-way retracting gripping hook;

[0053] The electric telescopic push rod 32 is fixed on the outer shell 31; the top end of the electric telescopic push rod 32 is provided with a hook 33, and the electric telescopic push rod 32 can drive the hook 33 to move radially to calibrate the main reinforcement of the deformed steel cage 5.

[0054] Specifically, the grasping and recovery component includes an electric telescopic push rod 32 and a grab hook 33. The grab hook 33 is a one-way retracting grab hook. In this embodiment, a self-locking horn hook is used. The tail of the self-locking horn hook is welded and fixed to the moving end of the electric telescopic push rod 32. The electric telescopic push rod 32 is fixed on the outer shell 31 or the fixing plate 34. The top of the electric telescopic push rod 32 is provided with a grab hook 33. The electric telescopic push rod 32 can drive the grab hook 33 to move radially to straighten the main reinforcement 51 of the deformed segmented steel cage 5. The electric telescopic push rod 32 adjusts the position of the grab hook 33 according to the position of the main reinforcement 51 to straighten the deformed main reinforcement 51. The grab hook 33 is a one-way retracting grab hook. The construction personnel hook the self-locking horn hook onto the main reinforcement 51, which can ensure that the grab hook 33 grasps the main reinforcement 51 and the main reinforcement 51 does not detach during the pulling process. After straightening, the construction personnel remove the self-locking horn hook.

[0055] In this embodiment, an electric telescopic push rod is provided, which can adjust the position of the grab hook according to the diameter of the main reinforcement bar of the steel cage to calibrate the main reinforcement bar of the deformed steel cage; the grab hook is set as a self-locking ram's horn hook, which can ensure that the grab hook can grasp the main reinforcement bar of the steel cage and will not fall off during the process of pulling the main reinforcement bar of the steel cage.

[0056] In a specific embodiment, such as Figure 2 As shown, the calibration device 35 is a laser calibrator, and multiple laser calibrators 35 are arranged in pairs on the outer sides of the upper and lower ends of the main rib insertion hole.

[0057] In this device, a total of 16 laser calibrators are installed on the outer sides of the upper and lower ends of the main reinforcement insertion hole, with 8 on one side. They are placed at the four corners of the two main reinforcement insertion holes. The laser calibrators can emit lasers in the direction of the upper and lower steel cages to calibrate the position of the main reinforcement bars in the steel cages and form a comparison with the deformed main reinforcement bars in the steel cages. The main reinforcement bars in the steel cages are adjusted according to the position of the laser beams by the grasping and restoring device until they are parallel or overlapped with the emitted laser beams, and then the calibration stops.

[0058] The procedure for using this device is as follows:

[0059] Hoist the lower rebar cage into the foundation pit, and place the docking fixture above the main reinforcing bars of the rebar cage that need to be restored within the foundation pit. Place the main reinforcing bars of the lower and upper rebar cages that need to be connected into the space between the outer shell and the fixing plate of the docking fixture. Adjust the electric extension rod to fix multiple hooks onto the deformed main reinforcing bars of the rebar cage. Turn on the laser calibrator, which emits laser beams in the direction of the upper and lower rebar cages (four laser beams for each main reinforcing bar). Adjust the electric extension rod again to drive the hooks to pull the two opposite main reinforcing bars of the rebar cage until the main reinforcing bars are parallel to or overlap with the laser beams emitted by the laser calibrator, so that the main reinforcing bars are located in the four laser beams. Stop pulling the main reinforcing bars to complete the connection. Restoring the deformed reinforcing cage; adjusting the position of the connecting plate to adjust the height of the support; placing the butt fixing device downwards until the main reinforcing bar of the lower reinforcing cage is inserted into the sleeve through the insertion hole of the main reinforcing bar below; placing the main reinforcing bar of the upper reinforcing cage downwards until the main reinforcing bar of the upper reinforcing cage is inserted into the sleeve through the insertion hole of the main reinforcing bar above; the operator reaches into the operating port of the sleeve and tightens the reinforcing bar connecting sleeve to connect the main reinforcing bars of the upper and lower reinforcing cages; after the connection is completed, remove the U-shaped hook on the butt fixing device, pull the handle to make the butt fixing device rotate and open around the hinge axis, remove it from the connected reinforcing cage, disassemble the support, and remove the butt fixing device from the gap between the main reinforcing bars of the reinforcing cage to achieve the disassembly of the entire device.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A rebar cage splicing device, characterized in that, include: The gripping and recovery device, housing (31), calibration device (35), docking fixture (36), and bracket (38); The bracket (38) is provided on the lower side of the docking fixture (36); the outer shell (31) is provided on both sides of the docking fixture (36) opposite to the steel cage (5); a plurality of gripping and recovery devices are provided on the outer shell (31) for gripping the main bars of the upper and lower steel cages (5) and performing shape correction; a plurality of calibration devices (35) are provided on both sides of the docking fixture (36) opposite to the steel cage (5) for calibrating the position of the main bars of the upper and lower steel cages (5); a main bar insertion hole (366) is provided on the docking fixture (36), and the gripping and recovery device can grip the main bars of the upper and lower steel cages (5) for shape correction, so that the ends of the main bars of the upper and lower steel cages (5) can be aligned with the main bar insertion hole (366) and inserted into the main bar insertion hole (366) and then connected to each other.

2. The rebar cage splicing device according to claim 1, characterized in that, The docking fastener (36) includes a rotating device (362), a mounting plate (364), and a steel bar connecting sleeve (37). The two mounting plates (364) are arranged opposite to each other, and one end of the two mounting plates (364) is hinged by the rotating device (362). The two mounting plates (364) can be opened and closed in a direction perpendicular to the main reinforcement of the steel cage (5) by the rotating device (362). Both ends of the docking fixture (36) are provided with sleeve operating ports (365). The two mounting plates (364) are provided with main reinforcement insertion holes (366) that pass through the upper and lower surfaces. The main reinforcement insertion holes (366) are located on the side where the two mounting plates (364) are in contact with each other. The main reinforcement insertion holes (366) are connected to the sleeve operating ports (365) to form an upper main reinforcement insertion hole (3661) and a lower main reinforcement insertion hole (3662). A sleeve fixing groove (367) is provided at the end of the upper main reinforcement insertion hole (3661) and the lower main reinforcement insertion hole (3662) near the sleeve operating port (365). The steel bar connecting sleeve (37) is placed in the sleeve operating port (365) and both ends are located in the sleeve fixing groove (367) for connecting the ends of the main reinforcements of the upper and lower steel cages (5) inserted into the main reinforcement insertion holes.

3. A rebar cage splicing device according to claim 2, characterized in that, The docking fixture (36) also includes a handle (361) and a locking device (363). Each of the two mounting plates (364) is provided with a handle (361) at the other end opposite to the rotating device (362). A lock hole (3611) is provided on the handle (361). The locking device (363) can be inserted into or removed from the lock hole (3611) to lock or loosen the two mounting plates (364).

4. A rebar cage splicing device according to claim 1, characterized in that, The gripping and recovery device includes an electric telescopic push rod (32) and a gripping hook (33). The electric telescopic push rod (32) is fixed on the outer shell (31); the top of the electric telescopic push rod (32) is provided with a hook (33), and the electric telescopic push rod (32) can drive the hook (33) to move radially to calibrate the main reinforcement of the deformed steel cage (5).

5. A rebar cage splicing device according to claim 4, characterized in that, The grappling hook (33) is a one-way convergence grappling hook.

6. A rebar cage splicing device according to claim 1, characterized in that, It also includes a fixing plate (34), which is provided in the middle of the two sides of the docking fixture (36) and the steel cage (5) opposite to the outer shell (31). The fixing plate (34) is provided with a gripping and recovery device, which is opposite to the gripping and recovery device on the outer shell (31).

7. A rebar cage splicing device according to claim 1, characterized in that, It also includes a connecting plate (381); Connecting plates (381) are provided on both sides of the docking fixture (36) and at the top of the bracket (38). The connecting plates (381) on the bracket (38) are fixedly connected to the connecting plates (381) on both sides of the docking fixture (36) by bolts.

8. A rebar cage splicing device according to claim 2, characterized in that, The rotating device (362) is a hinge.

9. A rebar cage splicing device according to claim 1, characterized in that, The calibration device (35) is a laser calibrator.

10. A rebar cage splicing device according to claim 9, characterized in that, Multiple laser calibrators are arranged in pairs, one above the other, on the outer side of the upper and lower ends of the main rib insertion hole (366).

Images