A steel reinforcement cage welding machine for road and bridge construction

Abstract

The present invention discloses a steel cage welding machine for road and bridge construction, which specifically includes: a bottom plate having a stable base and a receiving groove provided inside the bottom plate. The outside of the bottom plate is fixedly connected with a fixed rod, and the outside of the fixed rod is fixedly connected with a protection plate. Above the protection plate is fixedly connected with a top plate; a positioning mechanism for determining the axis of the steel cage and controlling the fixing and rotation of the steel cage. The positioning mechanism includes a base and a clamping component. Above the base is fixedly connected with a bearing, and inside the bearing is rotatably connected with a fixed ring. The base is fixedly connected above the bottom plate, and the clamping component is fixedly connected inside the receiving groove; a control mechanism for controlling the welding position and maintaining the stability of the equipment. The control mechanism includes a first chute. The present invention relates to the technical field of steel cage welding. The steel cage welding machine for road and bridge construction achieves the purpose of improving the use efficiency of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of steel cage welding, and particularly to a steel cage welding machine for road and bridge construction. Background Art

[0002] The main function of the steel cage is the same as that of the longitudinal steel bars of the column, mainly playing a tensile role. The compressive strength of concrete is high but the tensile strength is very low. It plays a role in restraining the pile body concrete so that it can withstand a certain axial tension. During the construction of bridges, culverts or high-rise buildings, according to requirements, pile driving of the foundation may be required. The method is to use a machine to punch holes and grind holes with water, and the hole depth reaches the design requirements. Then, a steel cage is lowered into the pile hole, and a conduit is inserted for concrete pouring.

[0003] At present, for the steel cage welding machine used in road and bridge construction, it is difficult to align the axis of the steel cage before the welding work, and during the welding process, the angle of the steel cage needs to be moved multiple times for welding, and the situation where the welding point position is inaccurate is likely to occur. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a steel cage welding machine for road and bridge construction, which specifically includes:

[0005] A bottom plate, which has a stable base and a receiving groove provided inside the bottom plate. The outside of the bottom plate is fixedly connected with a fixed rod, and the outside of the fixed rod is fixedly connected with a protection plate, and the top of the protection plate is fixedly connected with a top plate;

[0006] A positioning mechanism, used to determine the axis of the steel cage and control the fixation and rotation of the steel cage. The positioning mechanism includes a base and a clamping component. The top of the base is fixedly connected with a bearing, and the inside of the bearing is rotatably connected with a fixed ring. The base is fixedly connected above the bottom plate, and the clamping component is fixedly connected inside the receiving groove;

[0007] A control mechanism, used to control the welding position and maintain the stability of the equipment. The control mechanism includes a first chute, and an electric telescopic column is fixedly connected inside the first chute. The lower part of the control mechanism is fixedly connected with a positioning mechanism, and the first chute is opened inside the top plate.

[0008] Preferably, the receiving groove is opened inside the bottom plate, and an electric push rod is fixedly connected inside the receiving groove. The top of the electric push rod is fixedly connected with an arc plate for receiving the steel cage, and the inside of the arc plate is smooth.

[0009] Preferably, an adapter plate is fixedly connected to the outside of the fixed ring. A fixed hemisphere is fixedly connected to the outside of the adapter plate. A motor is fixedly connected to the inside of the fixed hemisphere. A rotating shaft is fixedly connected to the output end of the motor. An adapter ring is fixedly connected to the outside of the rotating shaft. An electric push plate is fixedly connected to the inside of the adapter ring, which is used to control the position of the circular plate.

[0010] Preferably, a circular plate is fixedly connected to the outside of the electric push plate. A number of clamping rings are fixedly connected to the outside of the circular plate, which are used for clamping and connecting the steel reinforcement cage. The inside of the clamping ring is smooth.

[0011] Preferably, a slideway is provided inside the base. A second electric push rod is fixedly connected to the inside of the slideway. A slider is fixedly connected to the outside of the second electric push rod. A long plate is fixedly connected to the outside of the slider. A blower is fixedly connected to the inside of the long plate. A branch pipe is rotatably connected to the inside of the long plate.

[0012] Preferably, the clamping component includes a second bearing. A rotating column is rotatably connected to the inside of the second bearing. A fixed ring is fixedly connected to the outside of the rotating column. The second bearing is fixedly connected to the inside of the base.

[0013] Preferably, a surrounding plate is fixedly connected to the outside of the fixed ring, which is used to protect the steel reinforcement cage. A friction strip is fixedly connected to the inside of the surrounding plate. A connecting rod is fixedly connected to the inside of the surrounding plate.

[0014] Preferably, a sliding plate is fixedly connected to the outside of the electric telescopic column. A control column is fixedly connected to the lower side of the sliding plate. A welding gun is fixedly connected to the inside of the control column. A second sliding groove is provided inside the top plate. A second sliding plate is slidably connected to the inside of the second sliding groove. An adapter ring is fixedly connected to the outside of the second sliding plate. An adjusting rod is fixedly connected to the lower side of the second sliding plate, which is used to control the height of the positioning mechanism. The adapter ring is fixedly connected to the outside of the control column.

[0015] Preferably, the positioning mechanism includes a fixed box. A second blower is fixedly connected to the inside of the fixed box. An air supply pipe is fixedly connected to the outside of the fixed box. The fixed box is fixedly connected to the lower side of the adjusting rod.

[0016] Preferably, the positioning mechanism further includes a second fixed box. An electric telescopic rod is fixedly connected to the outside of the second fixed box. A positioning ring is fixedly connected to the outside of the electric telescopic rod. The second fixed box is fixedly connected to the lower side of the adjusting rod.

[0017] The present invention provides a steel reinforcement cage welding machine for road and bridge construction. It has the following beneficial effects:

[0018] 1. The steel cage welding machine for road and bridge construction can fix steel cages of different sizes at the same height and drive the steel cages to rotate through the setting of a positioning mechanism, so as to assist the welding work. Before the welding operation, it is difficult to align the axis of the steel cage due to its different sizes, resulting in inaccurate welding positions or even the steel cage falling during welding. This way, there is no need for workers to manually rotate the steel cage multiple times, achieving the purpose of facilitating the alignment of the axis and fixing the steel cage.

[0019] 2. The steel cage welding machine for road and bridge construction can protect the steel cage at the bottom by rotating the clamping component before and after installing and disassembling the steel cage through the setting of a clamping component. There is a friction strip fixedly connected inside the enclosure. If the steel cage falls on the enclosure, it will be buffered, and there are gaps between the enclosures to assist the heat dissipation work. After fixing the steel cage, it achieves the purpose of facilitating the auxiliary fixation of the steel cage and protecting the steel cage.

[0020] 3. The steel cage welding machine for road and bridge construction can control the position of the welding gun through the setting of a control mechanism, and make the positioning mechanism and the welding gun move together, so that the positioning mechanism is always in the same direction as the welding gun. While strengthening the welding gun, the position connection between the welding gun and the steel cage can be achieved, achieving the purpose of facilitating the control of the positions of the positioning mechanism and the welding gun.

[0021] 4. The steel cage welding machine for road and bridge construction can fix the welding gun and fix the steel cage at the welding position through the setting of a positioning mechanism. During the process of fixing steel cages of different sizes, after the spring rod is squeezed, the arc-shaped protection plates on both sides will limit the movement direction of the spring rod, preventing the angle of the second arc-shaped plate at the bottom from changing, fixing the bottom steel cage, and improving the welding accuracy. It achieves the purpose of facilitating the fixation of the welding position and improving the welding precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the steel cage welding machine for road and bridge construction of the present invention;

[0023] Figure 2 is a schematic bottom structure diagram of the steel cage welding machine for road and bridge construction of the present invention;

[0024] Figure 3 is a schematic structural diagram of the positioning mechanism of the present invention;

[0025] Figure 4 is of the present invention Figure 3 is a partial enlarged schematic view at A in the present invention;

[0026] Figure 5 is a schematic structural diagram of the clamping component of the present invention;

[0027] Figure 6Schematic diagram of the control mechanism of the present invention;

[0028] Figure 7 Schematic diagram of the positioning mechanism of the present invention;

[0029] Figure 8 For the present invention Figure 7 Partial enlarged schematic diagram at position B in the present invention.

[0030] In the figure: 1, bottom plate; 2, clamping mechanism; 201, base; 202, bearing; 203, fixing ring; 204, connecting plate; 205, fixed hemisphere; 206, electric push plate; 207, circular plate; 208, clamping ring; 209, engaging component; 2091, second bearing; 2092, rotating column; 2093, fixed ring; 2094, enclosing plate; 2095, friction strip; 2096, connecting rod; 210, slideway; 211, second electric push rod; 212, slider; 213, long plate; 214, branch pipe; 3, electric push rod; 4, arc plate; 5, fixed rod; 6, protection plate; 7, top plate; 8, control mechanism; 801, first chute; 802, electric telescopic column; 803, control column; 804, connecting ring; 805, second sliding plate; 806, second chute; 807, adjusting rod; 9, positioning mechanism; 901, fixed box; 902, air supply pipe; 903, second fixed box; 904, electric telescopic rod; 905, positioning ring; 906, bent rod; 907, vertical rod; 908, arc protection plate; 909, spring rod; 910, reinforcement base; 911, second arc plate; 10, receiving groove. Detailed implementation manners

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. The embodiments of the present invention are given for the purpose of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0032] As Figures 1 - 8 shown, the present invention provides a technical solution: specifically including:

[0033] Bottom plate 1, which has a stable base and a receiving groove 10 provided inside the bottom plate 1. The outside of the bottom plate 1 is fixedly connected with a fixed rod 5, the outside of the fixed rod 5 is fixedly connected with a protection plate 6, and the upper part of the protection plate 6 is fixedly connected with a top plate 7;

[0034] The positioning mechanism 2 is used to determine the axis of the steel reinforcement cage and control the fixation and rotation of the steel reinforcement cage. The positioning mechanism 2 includes a base 201 and a clamping component 209. Above the base 201, a bearing 202 is fixedly connected. Inside the bearing 202, a fixed ring 203 is rotatably connected. The base 201 is fixedly connected above the bottom plate 1, and the clamping component 209 is fixedly connected inside the receiving groove 10.

[0035] The control mechanism 8 is used to control the welding position and maintain the stability of the equipment. The control mechanism 8 includes a first chute 801. Inside the first chute 801, an electric telescopic column 802 is fixedly connected. Below the control mechanism 8, a positioning mechanism 9 is fixedly connected. The first chute 801 is opened inside the top plate 7.

[0036] The receiving groove 10 is opened inside the bottom plate 1. Inside the receiving groove 10, an electric push rod 3 is fixedly connected. Above the electric push rod 3, an arc-shaped plate 4 is fixedly connected. The inside of the arc-shaped plate 4 is smooth. It has the advantage of facilitating the alignment of the axis and improving the welding accuracy. Before using the equipment, turn on the electric push rod 3. The electric push rod 3 drives the arc-shaped plate 4 to move upward. Manually place the steel reinforcement cage above the arc-shaped plate 4, and turn on the positioning mechanism 2 to fix the position of the steel reinforcement cage, align the axis, and then turn off the electric push rod 3. At this time, the arc-shaped plate 4 returns to the inside of the receiving groove 10. Turn on the control mechanism 8 and the positioning mechanism 9 to start the welding work. Turn on the positioning mechanism 2 to send air to the position of the protection plate 6 at the welding position.

[0037] Outside the fixed ring 203, a connecting plate 204 is fixedly connected. Outside the connecting plate 204, a fixed hemisphere 205 is fixedly connected. Inside the fixed hemisphere 205, a motor is fixedly connected. The output end of the motor is fixedly connected with a rotating shaft. Outside the rotating shaft, a connecting ring is fixedly connected. Inside the connecting ring, an electric push plate 206 is fixedly connected.

[0038] Outside the electric push plate 206, a circular plate 207 is fixedly connected. Outside the circular plate 207, a number of positioning rings 208 are fixedly connected. The inside of the positioning rings 208 is smooth.

[0039] Inside the base 201, a slideway 210 is opened. Inside the slideway 210, a second electric push rod 211 is fixedly connected. Outside the second electric push rod 211, a slider 212 is fixedly connected. Outside the slider 212, a long plate 213 is fixedly connected. Inside the long plate 213, a blower is fixedly connected. Inside the long plate 213, a branch pipe 214 is rotatably connected.

[0040] The clamping component 209 includes a second bearing 2091. Inside the second bearing 2091, a rotating column 2092 is rotatably connected. Outside the rotating column 2092, a fixed ring 2093 is fixedly connected. The second bearing 2091 is fixedly connected inside the base 201.

[0041] The outer part of the fixed ring 2093 is fixedly connected with a surrounding plate 2094. The inner part of the surrounding plate 2094 is fixedly connected with a friction strip 2095, and the inner part of the surrounding plate 2094 is fixedly connected with a connecting rod 2096. It has the advantages of facilitating the alignment of the axis and fixing the steel reinforcement cage. After the steel reinforcement cage is placed above the arc-shaped plate 4, the electric push plate 206 is started. The electric push plate 206 drives the circular plate 207 to move towards the middle until the steel reinforcement cage is clamped inside the clamping ring 208.

[0042] Start the clamping component 209, and manually push the rotating column 2092. The rotating column 2092 rotates inside the second bearing 2091, making the surrounding plate 2094 at the bottom of the steel reinforcement cage. And with the assistance of the connecting rod 2096, the rotation angles of all the surrounding plates 2094 are the same.

[0043] When the welding work is in progress, start the motor inside the fixed hemisphere 205. The motor drives the rotating shaft to rotate, and then drives the second electric push rod 211 inside the connecting ring to rotate, and then drives the steel reinforcement cage inside to rotate for welding work. Start the second electric push rod 211. The second electric push rod 211 drives the slider 212 to slide inside the slideway 210, and then drives the outer long plate 213 to move. Manually rotate the branch pipe 214 to make the branch pipe 214 face obliquely upward towards the protection plate 6. Start the blower. At this time, the air in the blower is transported outward through the branch pipe 214 to supply air to the welding position and keep the wind direction away from the user.

[0044] After the equipment is used, the fixed ring 203 can be rotated forcefully to change the angle of the fixed ring 203 inside the bearing 202, making the clamping ring 208 face the outside of the equipment, and drying and cleaning the inside of the clamping ring 208.

[0045] The outer part of the electric telescopic column 802 is fixedly connected with a sliding plate. The lower part of the sliding plate is fixedly connected with a control column 803. The inside of the control column 803 is fixedly connected with a welding gun. A second chute 806 is opened inside the top plate 7. A second sliding plate 805 is slidably connected inside the second chute 806. The outer part of the second sliding plate 805 is fixedly connected with a connecting ring 804. The lower part of the second sliding plate 805 is fixedly connected with an adjusting rod 807. The connecting ring 804 is fixedly connected to the outside of the control column 803. It has the advantages of facilitating the control of the positioning mechanism and the position of the welding gun. Start the electric telescopic column 802. The electric telescopic column 802 starts to drive the sliding plate to slide inside the first chute 801, and then drives the control column 803 to move. Start the welding gun to start the welding work. During the movement of the control column 803, it will drive the connecting ring 804 and the second sliding plate 805 to move. The second sliding plate 805 moves inside the second chute 806 following it, and drives the positioning mechanism 9 at the bottom to move. The height of the positioning mechanism 9 can be controlled by adjusting the length of the adjusting rod 807.

[0046] The positioning mechanism 9 includes a fixed box 901. Inside the fixed box 901, a second fan is fixedly connected. Outside the fixed box 901, an air supply pipe 902 is fixedly connected. The fixed box 901 is fixedly connected below the adjusting rod 807.

[0047] The positioning mechanism 9 further includes a second fixed box 903. Outside the second fixed box 903, an electric telescopic rod 904 is fixedly connected. Outside the electric telescopic rod 904, a positioning ring 905 is fixedly connected. The second fixed box 903 is fixedly connected below the adjusting rod 807.

[0048] Outside the second fixed box 903, a bent rod 906 is fixedly connected. Outside the bent rod 906, a vertical rod 907 is fixedly connected. Below the vertical rod 907, an arc-shaped protection plate 908 is fixedly connected. Below the vertical rod 907, a spring rod 909 is fixedly connected. Below the spring rod 909, a reinforcement base 910 is fixedly connected. Below the reinforcement base 910, a second arc-shaped plate 911 is fixedly connected. It has the advantages of facilitating the fixation of the welding position and improving the accuracy of welding. Before the welding operation, adjust the length of the adjusting rod 807 to lower the position of the second fixed box 903. At this time, the bent rod 906 drives the vertical rod 907 to move downward, and the second arc-shaped plate 911 gradually engages above the steel reinforcement cage. At this time, the spring rod 909 is compressed and starts to deform. The spring rod 909 is between the two arc-shaped protection plates 908, making the second arc-shaped plate 911 always in the vertically downward direction, making the welding position more accurate, and the welding gun is always inside the positioning ring 905. During the welding process, turn on the second fan, and the air in the second fan moves outward through the air supply pipe 902 and reaches the welding point.

[0049] Working principle: Before using the equipment, turn on the electric push rod 3. The electric push rod 3 drives the arc-shaped plate 4 to move upward. Manually place the steel reinforcement cage above the arc-shaped plate 4, and turn on the positioning mechanism 2. After the steel reinforcement cage is placed above the arc-shaped plate 4, turn on the electric push plate 206. The electric push plate 206 drives the circular plate 207 to move towards the middle until the steel reinforcement cage is engaged inside the positioning ring 208. Turn on the engaging component 209, and manually push the rotating column 2092. The rotating column 2092 rotates inside the second bearing 2091, making the surrounding plate 2094 at the bottom of the steel reinforcement cage, and with the assistance of the connecting rod 2096, the rotation angles of all the surrounding plates 2094 are the same. Fix the position of the steel reinforcement cage and align it with the axis.

[0050] Subsequently, the electric push rod 3 is closed. At this time, the arc-shaped plate 4 returns to the inside of the receiving groove 10. The control mechanism 8 and the positioning mechanism 9 are turned on. Before the welding work, the length of the adjusting rod 807 is adjusted to lower the position of the second fixed box 903. At this time, the bent rod 906 drives the vertical rod 907 to move downward, and the second arc-shaped plate 911 gradually engages above the steel reinforcement cage. At this time, the spring rod 909 is squeezed and begins to deform. The spring rod 909 is in the middle of the two arc-shaped protection plates 908, making the second arc-shaped plate 911 always in the vertically downward direction, making the welding position more accurate, and the welding gun is always inside the positioning ring 905. During the welding process, the second blower is turned on, and the air in the second blower moves outward through the air supply pipe 902 and reaches the welding point.

[0051] The welding work begins. The electric telescopic column 802 is turned on, and the electric telescopic column 802 starts to drive the slide plate to slide inside the first chute 801, thereby driving the control column 803 to move. The welding gun is turned on, and the welding work can begin. When the welding work is in progress, the motor inside the fixed hemisphere 205 is turned on. The motor drives the rotating shaft to rotate, thereby driving the second electric push rod 211 inside the connecting ring to rotate, and then driving the steel reinforcement cage inside to rotate for welding work. During the movement of the control column 803, it will drive the connecting ring 804 and the second slide plate 805 to move. The second slide plate 805 moves inside the second chute 806 following it and drives the positioning mechanism 9 at the bottom. The height of the positioning mechanism 9 can be controlled by adjusting the length of the adjusting rod 807. The clamping mechanism 2 is turned on, and the second electric push rod 211 is turned on. The second electric push rod 211 drives the slider 212 to slide inside the slideway 210, thereby driving the outer long plate 213 to move. The branch pipe 214 is manually rotated to make the branch pipe 214 in the direction obliquely upward towards the protection plate 6. The blower is turned on. At this time, the air in the blower is transported outward through the branch pipe 214 to supply air to the welding position and keep the wind direction away from the user. Supply air to the welding position towards the position of the protection plate 6.

[0052] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the scope of protection of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A steel cage welding machine for road and bridge construction, specifically comprising: A bottom plate (1), characterized in that: the bottom plate (1) has a stable base and a receiving groove (10) arranged inside the bottom plate (1); the outside of the bottom plate (1) is fixedly connected to a fixing rod (5); the outside of the fixing rod (5) is fixedly connected to a protection plate (6); and the top of the protection plate (6) is fixedly connected to a top plate (7); A locking mechanism (2) is used to determine the axis of the steel cage and control the fixation and rotation of the steel cage, the locking mechanism (2) comprising a base (201) and a locking assembly (209), a bearing (202) being fixedly connected above the base (201), a fixing ring (203) being rotatably connected inside the bearing (202), the base (201) being fixedly connected above the bottom plate (1), and the locking assembly (209) being fixedly connected inside the receiving groove (10); A control mechanism (8) is used to control the welding position and maintain the stability of the equipment, the control mechanism (8) includes a first slide groove (801), the interior of the first slide groove (801) is fixedly connected to an electric telescopic column (802), the bottom of the control mechanism (8) is fixedly connected to a positioning mechanism (9), and the first slide groove (801) is opened inside the top plate (7); The exterior of the fixing ring (203) is fixedly connected to a connecting plate (204), the exterior of the connecting plate (204) is fixedly connected to a fixing hemisphere (205), the interior of the fixing hemisphere (205) is fixedly connected to a motor, the output end of the motor is fixedly connected to a rotating shaft, the exterior of the rotating shaft is fixedly connected to a connecting ring, and the interior of the connecting ring is fixedly connected to an electric push plate (206); The outside of the electric push plate (206) is fixedly connected to a circular plate (207), and the outside of the circular plate (207) is fixedly connected to a plurality of retaining rings (208), and the inside of the retaining rings (208) is smooth; The engaging assembly (209) comprises a second bearing (2091), the interior of the second bearing (2091) is rotatably connected to a rotating column (2092), the exterior of the rotating column (2092) is fixedly connected to a fixing ring (2093), and the second bearing (2091) is fixedly connected to the interior of the base (201); The exterior of the fixing ring (2093) is fixedly connected to a panel (2094), the interior of the panel (2094) is fixedly connected to a friction strip (2095), and the interior of the panel (2094) is fixedly connected to a connecting rod (2096); The outside of the electric telescopic column (802) is fixedly connected to a slide, the bottom of the slide is fixedly connected to a control column (803), the inside of the control column (803) is fixedly connected to a welding gun, the inside of the top plate (7) is provided with a second slide groove (806), the inside of the second slide groove (806) is slidably connected to a second slide plate (805), the outside of the second slide plate (805) is fixedly connected to a connecting ring (804), the bottom of the second slide plate (805) is fixedly connected to an adjusting rod (807), the connecting ring (804) is fixedly connected to the outside of the control column (803), The positioning mechanism (9) comprises a fixed box (901), the interior of the fixed box (901) is fixedly connected to a second fan, the exterior of the fixed box (901) is fixedly connected to an air supply pipe (902), and the fixed box (901) is fixedly connected below the adjustment rod (807); The positioning mechanism (9) further comprises a second fixed box (903), the exterior of the second fixed box (903) being fixedly connected to an electric telescopic rod (904), the exterior of the electric telescopic rod (904) being fixedly connected to a positioning ring (905), and the second fixed box (903) being fixedly connected below the adjusting rod (807).

2. A steel cage welding machine for road and bridge construction according to claim 1, characterized in that: The receiving groove (10) is opened inside the bottom plate (1), and an electric push rod (3) is fixedly connected inside the receiving groove (10). An arc plate (4) is fixedly connected above the electric push rod (3), and the inside of the arc plate (4) is smooth.

3. The steel cage welding machine for road and bridge construction according to claim 1, characterized in that: A slideway (210) is provided inside the base (201), a second electric push rod (211) is fixedly connected to the inside of the slideway (210), a slider (212) is fixedly connected to the outside of the second electric push rod (211), a long plate (213) is fixedly connected to the outside of the slider (212), a fan is fixedly connected to the inside of the long plate (213), and a branch pipe (214) is rotatably connected to the inside of the long plate (213).

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