Adjustable roller dismounting device

Abstract

The utility model discloses an adjustable roller dismounting device, which belongs to the technical field of roller replacement of rolling mills, and comprises a cold rolling mill and a support plate I. The cold rolling mill comprises a rolling mill body and a nut; the translation rotating assembly is used for driving the nut to rotate and separate; the pneumatic clamping assembly is used for clamping the nut; the translation rotating assembly comprises translation driving assemblies and a synchronous rotating assembly, the pneumatic clamping assemblies comprise pneumatic driving assemblies and translation clamping assemblies, and the number of the nuts, the number of the pneumatic driving assemblies and the number of the translation clamping assemblies are four. The two sets of nuts on the front side, the pneumatic driving assembly and the translation clamping assembly are symmetrically distributed with the two sets of nuts on the rear side, the pneumatic driving assembly and the translation clamping assembly in the front-back direction relative to the center of the rolling mill body. In this way, the nut can be fixed through pneumatic adjusting and clamping, then the nut is rotated out through translation and rotation, the rolling mill body can be disassembled conveniently, and work is more convenient, faster and more efficient.

Description

TECHNICAL FIELD

[0001] The utility model relates to rolling mill roll changing technical field, concretely relates to a kind of adjustable roll dismounting device. BACKGROUND

[0002] In prior art, after the rolling mill needing roll changing is separated, the staff transports the rolling mill to the fixed position on the operating platform of roll changing vehicle by crane, sequentially resolves four rolling mill nuts by manual operation, separates the rolling mill rack on both sides, replaces new and old roll system by roll changing vehicle, then closes the rack, the staff relocks the nut, transports the edger rolling mill to original position, and the decomposition locking treatment of multiple nuts needs to consume more time and is inconvenient to operate.

[0003] Based on this, the utility model designs a kind of adjustable roll dismounting device to solve the above problems. UTILITY MODEL CONTENTS

[0004] In view of the above shortcomings of prior art, the utility model provides an adjustable roll dismounting device.

[0005] To achieve the above object, the utility model is realized by the following technical schemes:

[0006] An adjustable roll dismounting device, including cold rolling mill and support plate one, the cold rolling mill includes rolling mill body and nut;It further includes translation rotation assembly for driving nut rotation and disengagement and pneumatic clamping assembly for clamping nut;

[0007] The translation rotation assembly includes translation driving assembly and synchronous rotation assembly, and the pneumatic clamping assembly includes pneumatic driving assembly and translation clamping assembly, the nut, pneumatic driving assembly and translation clamping assembly are provided with four groups, and the two groups of nuts, pneumatic driving assembly and translation clamping assembly in front are respectively symmetrically distributed about the center of rolling mill body before and after the two groups of nuts, pneumatic driving assembly and translation clamping assembly behind;

[0008] The right end screw rod of the rolling mill body is threadedly connected with the four groups of nuts, the nut is connected with the translation clamping assembly, the support plate one is arranged on the right side of cold rolling mill, the translation driving assembly is installed on the upper end of support plate one, the synchronous rotation assembly is installed on the upper portion of translation driving assembly, the pneumatic driving assembly is installed on the left end of synchronous rotation assembly, and the translation clamping assembly is installed on the left portion of pneumatic driving assembly.

[0009] Further, the thread direction of the two groups of nuts in front is opposite to the thread direction of the two groups of nuts behind.

[0010] Further, the translation driving assembly comprises a cylinder, a second supporting plate, a gear box, a sliding block and a sliding rail; the cylinder is fixedly installed at the upper end of the first supporting plate, the output end of the cylinder is fixedly connected with the second supporting plate, the gear box is fixedly installed at the left end of the second supporting plate, the sliding block is fixedly installed at the lower end of the second supporting plate and the gear box, the sliding block is limitingly and slidingly connected with the side wall of the sliding rail, the sliding rail is fixedly installed at the upper end of the first supporting plate, and the second supporting plate and the gear box are connected with the synchronous rotating assembly.

[0011] Further, the sliding block and the sliding rail are provided with two groups and are symmetrically distributed about the center of the second supporting plate.

[0012] Further, the synchronous rotating assembly comprises a motor, a first gear and a second gear; the motor is fixedly installed at the upper end of the second supporting plate, the output end of the motor is fixedly connected with the rotating shaft of the first gear, the rotating shaft of the first gear is rotationally connected with the gear box, the first gear is meshingly connected with four groups of the second gears, the rotating shaft of the second gear is rotationally connected with the gear box, and the second gear is connected with the pneumatic driving assembly.

[0013] Further, the pneumatic driving assembly comprises a first rotating plate, a sliding ring, a sealing ring, a second rotating plate and an air pipe; the right end of the first rotating plate is fixedly connected with the rotating shaft of the second gear, the left end of the first rotating plate is rotationally connected with the sliding ring, the sliding ring is fixedly installed at the left side of the gear box through a connecting rod, the left end of the first rotating plate is fixedly connected with the second rotating plate, the inner wall of the sliding ring is provided with an annular groove, two groups of sealing rings are fixedly installed at the two end side walls of the annular groove, the outer wall of the second rotating plate is rotationally connected with the sliding ring, the central circular plate of the second rotating plate is provided with a ventilation groove, the ventilation groove is in communication with the space on the right of the central circular plate of the second rotating plate and the annular groove, the lower end of the annular groove is in communication with the air pipe, the air pipe is fixedly installed at the outer wall of the sliding ring, and the second rotating plate is connected with the translation clamping assembly.

[0014] Further, the translation clamping assembly comprises a piston, a connecting plate, a connecting rod, a sliding plate and a clamping plate; the right end of the piston is slidingly connected with the inner wall of the second rotating plate, the central part of the central circular plate of the second rotating plate is provided with a sliding groove one, the piston is limitingly and slidingly connected with the inner wall of the sliding groove one, the left end of the piston is fixedly connected with the connecting plate, the connecting rod and the clamping plate are provided with three groups and are equidistantly distributed around the axis of the piston, the right end of the clamping plate is provided with a notch, one end of the connecting rod is hingedly connected with the connecting plate, the other end of the connecting rod is hingedly connected with the inner wall of the notch, the left side of the second rotating plate is provided with a sliding groove two, the sliding plate is limitingly and slidingly connected with the inner wall of the sliding groove two, the sliding plate is fixedly connected with the outer wall of the clamping plate, and the clamping plate is abuttingly connected with the outer wall of the nut.

[0015] Further, the ventilation groove is provided in an L shape.

[0016] Compared with the prior art, the utility model discloses the beneficial effect is: 1, the utility model discloses when needing to roll the mill body and split, the translation drive assembly drives the synchronous rotation component left, and the synchronous rotation component drives pneumatic drive assembly and the translation clamping assembly left, and the pneumatic drive assembly drives the translation clamping assembly and holds the nut through the pneumatic force, when driving synchronous rotation component rotation, synchronous rotation component drives pneumatic drive assembly and rotates, and the pneumatic drive assembly drives the translation clamping assembly and rotates, and the translation drive assembly drives right simultaneously, and the nut is turned from the mill body, so that the mill body left and right connecting plate is separated subsequently, thereby dismantling the roll;

[0017] 2, the utility model discloses when needing to turn the nut from the mill body, and the output end of pneumatic cylinder drives support plate no.

[0018] 3, the utility model discloses when needing to turn the nut, and the pneumatic cylinder transmission rotation plate no. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0020] Figure 1 A perspective view of the adjustable roll dismounting device of the present application Figure 1 ;

[0021] Figure 2 A front view of the adjustable roll dismounting device of the present application

[0022] Figure 3 A right view of the adjustable roll dismounting device of the present application

[0023] Figure 4 A perspective view of the adjustable roll dismounting device of the present application Figure 2 ;

[0024] Figure 5 A partial perspective view of the adjustable roll dismounting device of the present application

[0025] Figure 6 A perspective view cut along the A-A direction of Figure 3 ; A perspective view cut along the A-A direction of

[0026] Figure 7 An enlarged view of B in Figure 6 ; An enlarged view of B in

[0027] The reference numerals in the drawings represent respectively:

[0028] 1, cold rolling mill; 11, rolling mill body; 12, nut; 2, support plate one; 3, translation and rotation assembly; 31, translation driving assembly; 311, air cylinder; 312, support plate two; 313, gear box; 314, sliding block; 315, sliding rail; 32, synchronous rotation assembly; 321, motor; 322, gear one; 323, gear two; 4, pneumatic clamping assembly; 41, pneumatic driving assembly; 411, rotating plate one; 412, sliding ring; 413, annular groove; 414, sealing ring; 415, rotating plate two; 416, air passage groove; 417, air pipe; 42, translation clamping assembly; 421, piston; 422, sliding groove one; 423, connecting plate; 424, connecting rod; 425, notch; 426, sliding groove two; 427, sliding plate; 428, clamping plate. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0030] In the following description, "left", "right", "front", "rear", "upper", "lower" are oriented with the perspective of the front view.

[0031] Embodiment one: in some embodiments, referring to the drawings of the specification Figures 1-7 A regulating roll dismounting device, comprising a cold rolling mill 1 and a support plate one 2, the cold rolling mill 1 comprising a rolling mill body 11 and a nut 12; further comprising a translation rotation assembly 3 for driving the nut 12 to rotate off and a pneumatic clamping assembly 4 for clamping the nut 12;

[0032] The translation rotation assembly 3 comprises a translation driving assembly 31 and a synchronous rotation assembly 32, the pneumatic clamping assembly 4 comprises a pneumatic driving assembly 41 and a translation clamping assembly 42, the nut 12, the pneumatic driving assembly 41 and the translation clamping assembly 42 are provided with four groups, the two groups of nuts 12, pneumatic driving assemblies 41 and translation clamping assemblies 42 on the front side are respectively symmetrically distributed about the center of the rolling mill body 11 before and after the two groups of nuts 12, pneumatic driving assemblies 41 and translation clamping assemblies 42 on the rear side;

[0033] The right end screw rod of the rolling mill body 11 is threadedly connected with the four groups of nuts 12, the nut 12 is connected with the translation clamping assembly 42, the support plate one 2 is arranged on the right side of the cold rolling mill 1, the translation driving assembly 31 is installed on the upper end of the support plate one 2, the synchronous rotation assembly 32 is installed on the upper part of the translation driving assembly 31, the pneumatic driving assembly 41 is installed on the left end of the synchronous rotation assembly 32, and the translation clamping assembly 42 is installed on the left part of the pneumatic driving assembly 41.

[0034] When this utility model is used, if it is necessary to disassemble the mill body 11, that is, to separate the mill body 11 and the nut 12, the translation drive assembly 31 drives the synchronous rotation assembly 32 to move to the left. The synchronous rotation assembly 32 drives the pneumatic drive assembly 41 and the translation clamping assembly 42 to move to the left. The pneumatic drive assembly 41 drives the translation clamping assembly 42 to clamp the nut 12 through pneumatic power. At this time, the synchronous rotation assembly 32 is driven to rotate. The synchronous rotation assembly 32 drives the pneumatic drive assembly 41 to rotate. The pneumatic drive assembly 41 drives the translation clamping assembly 42 to rotate. At the same time, the translation drive assembly 31 drives the mill body 11 to move to the right, so that the nut 12 can be rotated off the mill body 11 so that the left and right connecting plates of the mill body 11 can be separated later, thereby disassembling the roll.

[0035] The thread direction of the two sets of nuts 12 on the front side is opposite to that of the two sets of nuts 12 on the rear side.

[0036] When using this invention, the rotation direction of the nut 12 needs to be matched with the rotation drive direction of the synchronous rotation component 32 so that they can rotate out synchronously.

[0037] The translation drive assembly 31 includes a cylinder 311, a second support plate 312, a gearbox 313, a slider 314, and a slide rail 315. The cylinder 311 is fixedly installed on the upper end of the first support plate 2, and the output end of the cylinder 311 is fixedly connected to the second support plate 312. The gearbox 313 is fixedly installed on the left end of the second support plate 312. The slider 314 is fixedly installed on the lower end of the second support plate 312 and the gearbox 313. The slider 314 is slidably connected to the side wall of the slide rail 315. The slide rail 315 is fixedly installed on the upper end of the first support plate 2. The second support plate 312 and the gearbox 313 are connected to the synchronous rotation assembly 32.

[0038] The slider 314 and slide rail 315 are provided in two sets and are symmetrically distributed about the center of the support plate 312.

[0039] The synchronous rotation assembly 32 includes a motor 321, a first gear 322, and a second gear 323. The motor 321 is fixedly installed on the upper end of the second support plate 312. The output end of the motor 321 is fixedly connected to the rotating shaft of the first gear 322. The rotating shaft of the first gear 322 is rotatably connected to the gearbox 313. The first gear 322 meshes with four sets of second gears 323. The rotating shaft of the second gear 323 is rotatably connected to the gearbox 313. The second gear 323 is connected to the pneumatic drive assembly 41.

[0040] The utility model discloses a rolling mill body 11 is provided with the nut 12, the nut 12 is provided with the screw thread, the rolling mill body 11 is provided with the pneumatic drive assembly 41 and the translation clamping assembly 42, the pneumatic drive assembly 41 is provided with the gear one 322 and the gear two 323, the gear one 322 is provided with the motor 321, the gear two 323 is provided with the support plate two 312 and the gear box 313, the gear box 313 is provided with the slide rail 315, the utility model discloses when using, when need to turn out the nut 12 from the rolling mill body 11, the output end of pneumatic cylinder 311 drive support plate two 312 and gear box 313 remove, support plate two 312 and gear box 313 drive slider 314 along slide rail 315 left remove, support plate two 312 drive motor 321 left remove, motor 321 and gear box 313 drive gear one 322 and gear two 323 left remove, gear one 322 and gear two 323 drive pneumatic drive assembly 41 and translation clamping assembly 42 left remove, make translation clamping assembly 42 be located the outside of nut 12 to clamping nut 12, the output end of pneumatic cylinder 311 again drive right remove at this time, the output end of motor 321 drive gear one 322 rotate, gear one 322 drive the two groups of gear two 323 of front side and the two groups of gear two 323 of rear side rotate around two different directions, gear two 323 drive pneumatic drive assembly 41 and translation clamping assembly 42 rotate, translation clamping assembly 42 drive nut 12 rotate, cooperate motor 321 drive right remove, and turn out the nut 12 from the rolling mill body 11 along the thread direction, realize the roll stand separation in rolling mill body 11, two groups of slider 314 and slide rail 315 make the removal more stable.

[0041] The pneumatic drive assembly 41 includes a rotating plate one 411, a slip ring 412, a sealing ring 414, a rotating plate two 415 and an air pipe 417; the right end of the rotating plate one 411 is fixedly connected with the rotating shaft of the gear two 323, the left end of the rotating plate one 411 is rotationally connected with the slip ring 412, the slip ring 412 is fixedly installed on the left side of the gear box 313 through a connecting rod, the left end of the rotating plate one 411 is fixedly connected with the rotating plate two 415, the inner wall of the slip ring 412 is provided with an annular groove 413, two groups of sealing rings 414 are fixedly installed on the two end side walls of the annular groove 413, the outer wall of the rotating plate two 415 is rotationally connected with the slip ring 412, an air passage 416 is formed in the middle circular plate of the rotating plate two 415, the air passage 416 is in communication with the space on the right of the middle circular plate of the rotating plate two 415 and the annular groove 413, the lower end of the annular groove 413 is in communication with the air pipe 417, the air pipe 417 is fixedly installed on the outer wall of the slip ring 412, and the rotating plate two 415 is connected with the translation clamping assembly 42; the air pipe 417 is connected with an external air pump device.

[0042] The translation clamping assembly 42 includes a piston 421, a connecting plate 423, a connecting rod 424, a sliding plate 427 and a clamping plate 428; the right end of the piston 421 is in sliding connection with the inner wall of the rotating plate two 415, a sliding groove one 422 is formed in the center of the middle circular plate of the rotating plate two 415, the piston 421 is in limit sliding connection with the inner wall of the sliding groove one 422, the left end of the piston 421 is fixedly connected with the connecting plate 423, the connecting rod 424 and the clamping plate 428 are provided with three groups and are distributed at equal intervals around the axis of the piston 421, a notch 425 is formed in the right end of the clamping plate 428, one end of the connecting rod 424 is hinged with the connecting plate 423, the other end of the connecting rod 424 is hinged with the inner wall of the notch 425, a sliding groove two 426 is formed in the left side of the rotating plate two 415, the sliding plate 427 is in limit sliding connection with the inner wall of the sliding groove two 426 in cooperation, the sliding plate 427 is fixedly connected with the outer wall of the clamping plate 428, and the clamping plate 428 is in abutting connection with the outer wall of the nut 12.

[0043] The ventilation groove 416 is provided in the shape of L.

[0044] When the nut 12 needs to be turned out, the cylinder 311 drives the rotating plate one 411 to move, the gear box 313 drives the sliding ring 412 to move, the rotating plate one 411 drives the rotating plate two 415 to move, the rotating plate two 415 drives the piston 421 and the sliding plate 427 to move, the air pipe 417 drives the clamping plate 428 to move, and the clamping plate 428 drives the nut 12 to move, and meanwhile the motor 321 drives the gear two 323 to rotate, the gear two 323 drives the rotating plate one 411 to rotate, the rotating plate one 411 drives the rotating plate two 415 to rotate, the rotating plate two 415 drives the piston 421 and the sliding plate 427 to rotate, the sliding plate 427 drives the clamping plate 428 to rotate, and the clamping plate 428 drives the nut 12 to rotate, so that the nut 12 is turned out. When the nut 12 needs to be clamped, the external air pump blows air through the air pipe 417, the air pipe 417 inputs the gas into the rotating plate two 415 through the annular groove 413 and the ventilation groove 416, the right side of the middle circular plate of the rotating plate two 415 and the space surrounded by the sliding ring 412 increase in air pressure, the piston 421 moves to the right along the sliding groove one 422, the piston 421 drives the connecting plate 423 to move to the right, the connecting plate 423 drives the connecting rod 424 to rotate, the connecting rod 424 drives the clamping plate 428 and the sliding plate 427 to move downward along the sliding groove two 426, the clamping plate 428 is inwardly folded to clamp the nut 12, so that the nut 12 will not fall off during subsequent rotation.

[0045] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A gauge adjusting roll changing device comprising a cold rolling mill (1) and a first support plate (2), characterized in that: The cold rolling mill (1) comprises a rolling mill body (11) and nuts (12); further comprises a translation-rotation assembly (3) for driving the nuts (12) to rotate off and a pneumatic clamping assembly (4) for clamping the nuts (12); The translation-rotation assembly (3) comprises a translation driving assembly (31) and a synchronous rotation assembly (32), the pneumatic clamping assembly (4) comprises a pneumatic driving assembly (41) and a translation clamping assembly (42), the nuts (12), the pneumatic driving assembly (41) and the translation clamping assembly (42) are provided with four groups, the two groups of nuts (12), the pneumatic driving assembly (41) and the translation clamping assembly (42) on the front side are respectively symmetrically distributed about the center of the rolling mill body (11) with the two groups of nuts (12), the pneumatic driving assembly (41) and the translation clamping assembly (42) on the back side. The right end screw rod of the rolling mill body (11) is threadedly connected with the four groups of nuts (12), the nuts (12) are connected with the translation clamping assembly (42), the first supporting plate (2) is arranged on the right side of the cold rolling mill (1), the translation driving assembly (31) is installed on the upper end of the first supporting plate (2), the synchronous rotation assembly (32) is installed on the upper part of the translation driving assembly (31), the pneumatic driving assembly (41) is installed on the left end of the synchronous rotation assembly (32), and the translation clamping assembly (42) is installed on the left part of the pneumatic driving assembly (41).

2. The adjustable doffing device of claim 1, wherein, The thread directions of the two groups of nuts (12) on the front side are opposite to those of the two groups of nuts (12) on the back side.

3. The adjustable doffing device of claim 1, wherein, The translation driving assembly (31) comprises a pneumatic cylinder (311), a second supporting plate (312), a gear box (313), a sliding block (314) and a sliding rail (315); The pneumatic cylinder (311) is fixedly installed on the upper end of the first supporting plate (2), the output end of the pneumatic cylinder (311) is fixedly connected with the second supporting plate (312), the gear box (313) is fixedly installed on the left end of the second supporting plate (312), the sliding block (314) is fixedly installed on the lower ends of the second supporting plate (312) and the gear box (313), the sliding block (314) is limitingly and slidably connected with the side wall of the sliding rail (315), the sliding rail (315) is fixedly installed on the upper end of the first supporting plate (2), and the second supporting plate (312) and the gear box (313) are connected with the synchronous rotation assembly (32).

4. The adjustable doffing device of claim 3, wherein, The sliding block (314) and the sliding rail (315) are provided with two groups and are symmetrically distributed about the center of the second supporting plate (312).

5. The adjustable doffing device of claim 3, wherein, The synchronous rotation assembly (32) comprises a motor (321), a first gear (322) and a second gear (323); The motor (321) is fixedly installed on the upper end of the second supporting plate (312), the output end of the motor (321) is fixedly connected with the rotating shaft of the first gear (322), the rotating shaft of the first gear (322) is rotationally connected with the gear box (313), the first gear (322) is meshingly connected with the four groups of second gears (323), the rotating shaft of the second gear (323) is rotationally connected with the gear box (313), and the second gear (323) is connected with the pneumatic driving assembly (41).

6. The adjustable doffing device of claim 5, wherein, The pneumatic driving assembly (41) comprises a rotating plate one (411), a sliding ring (412), sealing rings (414), a rotating plate two (415) and an air pipe (417); The right end of the rotating plate one (411) is fixedly connected with the rotating shaft of the gear two (323), the left end of the rotating plate one (411) is rotatably connected with the sliding ring (412), the sliding ring (412) is fixedly installed on the left side of the gear box (313) through a connecting rod, the left end of the rotating plate one (411) is fixedly connected with the rotating plate two (415), the inner wall of the sliding ring (412) is provided with an annular groove (413), two groups of sealing rings (414) are fixedly installed on the two end side walls of the annular groove (413), the outer wall of the rotating plate two (415) is rotatably connected with the sliding ring (412), the central circular plate of the rotating plate two (415) is provided with a ventilation groove (416), the ventilation groove (416) is in communication with the space on the right of the central circular plate of the rotating plate two (415) and the annular groove (413), the lower end of the annular groove (413) is in communication with the air pipe (417), the air pipe (417) is fixedly installed on the outer wall of the sliding ring (412), and the rotating plate two (415) is connected with the translation clamping assembly (42).

7. The adjustable doffing device of claim 6, wherein, The translation clamping assembly (42) comprises a piston (421), a connecting plate (423), a connecting rod (424), a sliding plate (427) and a clamping plate (428); The right end of the piston (421) is slidably connected with the inner wall of the rotating plate two (415), the central circular plate of the rotating plate two (415) is provided with a sliding groove one (422) at the center, the piston (421) is limitingly and slidably connected with the inner wall of the sliding groove one (422), the left end of the piston (421) is fixedly connected with the connecting plate (423), the connecting rod (424) and the clamping plate (428) are provided with three groups and are distributed at equal intervals around the axis of the piston (421), the right end of the clamping plate (428) is provided with a notch (425), one end of the connecting rod (424) is hingedly connected with the connecting plate (423), the other end of the connecting rod (424) is hingedly connected with the inner wall of the notch (425), the left side of the rotating plate two (415) is provided with a sliding groove two (426), the sliding plate (427) is limitingly and slidably connected with the inner wall of the sliding groove two (426), the sliding plate (427) is fixedly connected with the outer wall of the clamping plate (428), and the clamping plate (428) is abuttingly connected with the outer wall of the nut (12).

8. The adjustable doffing device of claim 7, wherein, The ventilation groove (416) is in the shape of L.

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