A sand core rotating flow coating fixture

Abstract

The present invention relates to the technical field of sand core flow coating, and discloses a sand core rotating flow coating fixture, comprising a clamping main frame, a rotating component is fixedly installed on one side of the clamping main frame, and the bottom end of the clamping main frame is fixedly connected to the clamping frame, the clamping frame is located on a side close to the rotating component and the clamping component is fixedly installed on the side adjacent to the clamping frame. The present invention provides a functional groove, so that the ball of the spring piece fixing ring is clamped into the arc clamping groove, so that the fixed concave plate cannot be retracted. At this time, the clamping tooth enters the reversing groove, and the fixed clamping block is also returning, so that the fixed clamping block clamps the fixed concave plate, so that the fixed concave plate is squeezed into the flat clamping groove, and the fixed concave plate is fixed by the action of the fixed clamping block, so as to achieve the purpose of support, the clamping tooth is clamped from the reversing groove to the bottom end of the fixed groove, and the fixing of the fixed concave plate is completed, so that the fixing of the core rod groove in the sand core main body can be automatically completed without manual operation, which provides convenience for subsequent fixing.

Description

Technical Field

[0001] The invention relates to the technical field of sand core flow coating, and more specifically to a sand core rotating flow coating fixture. Background Art

[0002] The sand core flow coating rotary fixture is a special tool used for sand core dipping in the foundry industry. It combines the functions of rotation and fixture to achieve uniform dipping of the sand core. The sand core is placed in the clamping mechanism of the fixture, and the spacing of the clamping mechanism is adjusted to suit the size of the sand core. The coating tank is moved to the bottom of the sand core so that the sand core is gradually immersed in the coating. The tilting rotation of the sand core is started to drain the excess coating.

[0003] However, at present, when clamping the sand core, there are great problems in fixing the larger sand core. Firstly, for the fixation, it is necessary to ensure that the fixation is firm enough. The traditional method of fixation adopts multi-angle fixation at the same time, resulting in a large amount of paint being wasted on the fixing frame, and the operation steps are cumbersome during fixation. Therefore, the present invention provides a sand core rotating flow coating fixture. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a sand core rotary flow coating fixture to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a sand core rotary flow coating fixture comprises a clamping main body frame, a rotating assembly is fixedly installed on one side of the clamping main body frame, a clamping frame is fixedly connected to the bottom end of the clamping main body frame, the clamping frame is located on a side close to the rotating assembly and a clamping assembly is fixedly installed on both sides adjacent to the clamping frame, a main fixed cylinder is fixedly connected to the top middle part of the clamping frame, the clamping frame is clamped with the sand core body through the clamping assemblies and the main fixed cylinder on both sides, a main rod body is fixedly connected to the bottom end of the main fixed cylinder, the main fixed cylinder is provided with a main output rod, and the main output rod A buffer spring is fixedly connected to the bottom end, and a secondary rod body is fixedly connected to the bottom end of the buffer spring. The buffer spring and the secondary rod body are located in the main rod body. The main output rod is movably connected to the main conduction rod in the middle of the bottom end. A control cavity is provided at the bottom end of the secondary rod body. A push ring is fixedly connected to the side of the main conduction rod located at the top of the middle part. A spring fixing ring is movably sleeved on the outer wall of the main conduction rod. The outer wall of the spring fixing ring is provided with equidistantly arranged embedded grooves. Tension springs are installed in the embedded grooves. A ball is movably connected to the embedded groove on the side of the tension spring close to the outer wall of the spring fixing ring.

[0006] Furthermore, the inner wall bottom end of the secondary rod body located in the control cavity is provided with equidistantly arranged arc grooves, and the arc grooves are movably engaged with the ball in the control cavity, the bottom end of the spring sheet fixing ring is fixedly connected with equidistantly arranged spring sheets, the bottom end of the spring sheet is fixedly welded with a fixed concave plate, the bottom end of the arc groove is provided with a spring sheet passing hole, the fixed concave plate moves in the spring sheet passing hole, the bottom end of the main conduction rod is movably engaged with a fixed rod, and the outer wall of the fixed rod is provided with a bottom block.

[0007] Furthermore, the bottom end of the fixed rod is fixedly connected to a fixed block, the outer wall of the fixed block is fixedly connected to fixed clamping blocks arranged equidistantly, the bottom end of the bottom block is provided with a clamping groove, the bottom end of the bottom block is fixedly connected to stop rods arranged equidistantly, and the bottom end of the secondary rod body is provided with a clamping groove that cooperates with the stop rod.

[0008] Furthermore, the main conduction rod is located at the bottom end of the spring piece fixing ring and is movably connected with a clamping ring. The inner wall of the clamping ring is provided with equidistantly arranged clamping teeth. The main conduction rod is provided with a functional groove at the clamping teeth. The functional grooves include multiple fixed grooves, reversing grooves and pull-back grooves. The order of the functional grooves opened on the surface of the main conduction rod is that the top of the fixed groove is connected with the top of the reversing groove, the bottom of the reversing groove is connected with the bottom of the pull-back groove, the top of the second reversing groove is connected with the top of the pull-back groove, the bottom of the second reversing groove is connected with the middle of the second fixed groove, the top of the second fixed groove is connected with the top of the third reversing groove, and they are connected in sequence until the end to end are connected.

[0009] Furthermore, the commutation grooves are all arranged obliquely, and the projection formed by all the commutation grooves is circular.

[0010] Furthermore, the retaining ring moves at the functional groove in the main conduction rod through the retaining teeth, and a smooth end is provided on the same side of the retaining teeth. A reversing spring is provided at the bottom end of the retaining ring, and the bottom end of the retaining ring is fixedly connected to the top end of the reversing spring. The bottom end of the groove in the control cavity is fixedly connected to the bottom end of the reversing spring, and the reversing spring has the function of rebounding in the positive direction when installed.

[0011] Technical effects and advantages of the present invention:

[0012] 1. The present invention is provided with a functional groove. Since the ball of the spring piece fixing ring is stuck in the arc groove, the spring piece fixing ring cannot move, and the fixed concave plate cannot be retracted. At this time, the clamping tooth enters the reversing groove, and the fixed clamping block is also returning. As the movement continues, the fixed clamping block clamps the fixed concave plate, so that the fixed concave plate is squeezed into the flat groove. At the same time, the fixed concave plate is fixed by the action of the fixed clamping block, thereby achieving the purpose of support. As the movement continues, the clamping tooth is stuck from the reversing groove to the bottom end of the fixed groove, and the fixing of the fixed concave plate is completed. The fixation of the core rod groove in the sand core body can be automatically completed without manual operation, which greatly provides convenience for subsequent fixation.

[0013] 2. The present invention is provided with a spring clip fixing ring. As the tension spring is continuously retracted by the main conduction rod, the tension spring is compressed, thereby releasing the blockage of the arc groove. As the spring clip fixing ring is pushed upward by the clamping ring, the spring sheet and the fixed concave plate at the bottom end of the spring clip fixing ring are retracted. As the return operation continues, the fixed clamping block of the fixed block and the flat groove of the bottom block are closed, thereby retracting the bottom block, allowing the fixed rod to drive the bottom block to return, and then the stop rod is retracted into the secondary rod body, thereby disengaging from the blockage of the sand core body, completing the clamping operation and the releasing operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the rotary flow coating effect of the present invention.

[0016] Figure 3 It is a schematic diagram of the main structure of the clamp of the present invention.

[0017] Figure 4 It is a schematic diagram of the main fixed cylinder structure of the present invention.

[0018] Figure 5 It is a schematic diagram of the main fixed cylinder structure decomposition of the present invention.

[0019] Figure 6 It is a schematic diagram of the exploded structure of the secondary rod body of the present invention.

[0020] Figure 7 It is a schematic diagram of the exploded structure of the spring fixing ring of the present invention.

[0021] Figure 8 It is a schematic diagram of the clamping ring structure of the present invention.

[0022] Fig. 9 For the present invention Figure 8 A schematic diagram of the enlarged structure in the middle.

[0023] Fig.10 It is a schematic diagram of the spring sheet structure of the present invention.

[0024] Fig.11 It is a schematic diagram of the main conduction rod structure of the present invention.

[0025] Fig.12 It is a schematic diagram of the bottom block structure of the present invention.

[0026] Fig.13 It is a schematic diagram of the cross-sectional structure of the secondary rod body of the present invention.

[0027] Fig.14 It is a schematic diagram of the effect after the fixing block of the present invention is fixed.

[0028] Fig.15 It is a schematic diagram of the front view structure of the main fixed cylinder of the present invention.

[0029] The reference numerals are: 1, clamping main frame; 2, rotating assembly; 3, clamping frame; 4, clamping assembly; 5, main fixed cylinder; 501, main rod body; 5011, buffer spring; 5012, main output rod; 502, secondary rod body; 5021, control cavity; 5022, arc clamping groove; 5023, spring sheet through hole; 503, bottom block; 5031, stop rod; 5032, clamping groove; 504, spring sheet fixing ring; 5041, embedded groove; 5042 , tension spring; 5043, ball; 5044, spring sheet; 5045, fixed concave plate; 505, main conduction rod; 5051, push ring; 5052, retaining ring; 5053, retaining tooth; 50531, smooth end; 5054, reversing spring; 506, fixed rod; 5061, fixed block; 5062, fixed clamping block; 507, functional slot; 5071, fixed slot; 5072, reversing slot; 5073, pull-back slot; 6, sand core body. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures described in the following embodiments are merely illustrative, and the sand core rotary flow coating fixture involved in the present invention is not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Reference Figure 1-6The present invention provides a sand core rotary flow coating fixture, comprising a clamping main frame 1, a rotating component 2 is fixedly installed on one side of the clamping main frame 1, a clamping frame 3 is fixedly connected to the bottom end of the clamping main frame 1, the clamping frame 3 is located on a side close to the rotating component 2 and a clamping component 4 is fixedly installed on the side adjacent to the clamping frame 3, the sand core is fixed by adopting a combination of two 4 and 5, which can greatly reduce the operation steps, a main fixed cylinder 5 is fixedly connected to the middle part of the top of the clamping frame 3, the clamping frame 3 is clamped with a sand core body 6 through the clamping components 4 and the main fixed cylinder 5 on both sides, the bottom end of the main fixed cylinder 5 is fixedly connected to a main rod body 501, the main fixed cylinder 5 is provided with a main output rod 5012, the main The bottom end of the output rod 5012 is fixedly connected with a buffer spring 5011. The setting of the buffer spring 5011 can provide a certain buffer when clamping, and will not cause the problem of artificial damage to the sand core, that is, the buffer spring 5011 controls the secondary rod body 502 to slowly contact with the core rod groove of the sand core, which reduces the damage to the sand core to a certain extent. The bottom end of the buffer spring 5011 is fixedly connected with the secondary rod body 502. The buffer spring 5011 and the secondary rod body 502 are located in the main rod body 501. The main output rod 5012 is movably connected with the main conduction rod 505 in the middle of the bottom end. The bottom end of the secondary rod body 502 is provided with a control cavity 5021. The main conduction rod 505 is fixedly connected with a push ring 5051 on one side of the top end of the middle part. The outer wall of the main conduction rod 505 is movably sleeved with a spring fixing ring 504, and the outer wall of the spring fixing ring 504 is provided with equidistantly arranged embedded grooves 5041, and tension springs 5042 are installed in the embedded grooves 5041. The embedded grooves 5041 are located on the side of the tension spring 5042 close to the outer wall of the spring fixing ring 504 and are movably clamped with a ball 5043. The diameter of the ball 5043 is larger than the diameter of the notch of the embedded groove 5041 located on the outer side of the spring fixing ring 504. The inner wall bottom end of the secondary rod body 502 located in the control cavity 5021 is provided with equidistantly arranged arc grooves 5022, and the arc grooves 5022 and the ball 5043 are located in the control cavity 5021 for movably clamping connection. The bottom end is fixedly connected with spring pieces 5044 arranged at equal distances. The spring pieces 5044 bend under extrusion, which can better ensure that the longer fixed concave plate 5045 can be extended without bending. The bottom end of the spring piece 5044 is fixedly welded with a fixed concave plate 5045. The fixed concave plate 5045 is concave inside. At the same time, there will be paint in the groove, which will cause the actual pressing part to flow for a long time, and there will be no problem of the clamping part not being coated with paint. The bottom end of the arc groove 5022 is provided with a spring piece passing hole 5023, and the fixed concave plate 5045 moves in the spring piece passing hole 5023. The bottom end of the main conduction rod 505 is movably connected with a fixed rod 506, and the outer wall of the fixed rod 506 is provided with a bottom block 503.The bottom end of the fixed rod 506 is fixedly connected with a fixed block 5061, and the outer wall of the fixed block 5061 is fixedly connected with fixed blocks 5062 arranged at equal distances. The bottom end of the bottom block 503 is provided with a flattening groove 5032, and the bottom end of the bottom block 503 is fixedly connected with stop rods 5031 arranged at equal distances. The bottom end of the secondary rod body 502 is provided with a slot that cooperates with the stop rod 5031. The main conduction rod 505 is located at the bottom end of the spring fixed ring 504 and is movably connected with a snap ring 5052. The inner wall of the snap ring 5052 is provided with equal distances. The main transmission rod 505 has teeth 5053 arranged at intervals, and a functional groove 507 is opened at the tooth 5053. The functional groove 507 includes a plurality of fixed grooves 5071, a reversing groove 5072 and a pull-back groove 5073. The order of the functional grooves 507 opened on the surface of the main transmission rod 505 is that the top of the fixed groove 5071 is connected to the top of the reversing groove 5072, the bottom of the reversing groove 5072 is connected to the bottom of the pull-back groove 5073, the top of the second reversing groove 5072 is connected to the top of the pull-back groove 5073, and the second The bottom end of the reversing groove 5072 is connected to the middle of the second fixed groove 5071, and the top of the second fixed groove 5071 is connected to the top of the third reversing groove 5072, and they are connected in sequence until the end is connected. The reversing grooves 5072 are all inclined, and the projection formed by all the reversing grooves 5072 is circular. The snap ring 5052 is located at the functional groove 507 in the main conduction rod 505 through the snap teeth 5053 to move. The same side of the snap teeth 5053 is provided with a smooth end 50531, and the smooth end 50531 is provided through the smooth end 505 31 can make the latching teeth 5053 move better in each functional groove 507. The bottom end of the snap ring 5052 is provided with a reversing spring 5054. The bottom end of the snap ring 5052 is fixedly connected to the top of the reversing spring 5054. The bottom end of the groove in the control cavity 5021 is fixedly connected to the bottom end of the reversing spring 5054. The reversing spring 5054 has a positive rebound when installed, which maximizes the accuracy of pulling back the spring sheet fixing ring 504 during the return stroke, and at the same time uses the torsion to offset the influence of the weight of the main transmission rod 505 itself.

[0032] Working principle:

[0033] When performing the rotary flow coating operation on the sand core, the sand core is attached with coating by immersion or spraying. When performing the coating operation, the sand core to be flow coated needs to be clamped according to its size. When flow coating is performed on a large sand core, it needs to be positioned and clamped. When clamping, the sand core is first placed in the correct position. When it is in the correct position, the present invention starts to work. First, the secondary rod body 502 is aligned with the core rod groove in the center of the sand core body 6. When the position is determined, the main fixed cylinder 5 is started to push out the main output rod 5012. As the main output rod 5012 is pushed out, the main conduction rod 505 moves downward. When the main output rod 5012 is pushed out, the buffer spring 5011 transmits the thrust to the secondary rod body 502. When the bottom end of the secondary rod body 502 contacts the sand core body 6, the buffer spring 5011 is compressed. During the compression, the main transmission rod 505 continues to descend. As the operation proceeds, the retaining ring 5052 rotates in the positive direction due to the torsional force of the reversing spring 5054, thereby moving along the second reversing groove 5072 under the action of descent, and the bottom block 503 moves downward. When the movement proceeds until the stop rod 5031 is stuck, At this time, it means that the main fixed cylinder 5 has been controlled to extend the fixed concave plate 5045. At this time, the latching tooth 5053 is located in the retraction groove 5073 due to the action of the reversing spring 5054. At the same time, the pushing ring 5051 has pushed the spring fixed ring 504 to move downward. As it continues to descend, the fixed rod 506 extends out of the bottom block 503 to reach the maximum telescopic length of the main fixed cylinder 5. At this time, the bottom block 503 is located in the cavity of the sand core body 6. The ball 5043 is stuck in the arc slot 5022 of the secondary rod body 502 due to the action of the embedded groove 5041. At this time, the fixed concave plate 5 045 Due to the elastic force of the spring sheet 5044 and the bending of the spring sheet 5044 itself, the fixed concave plate 5045 is pushed out from the flat groove 5032. At this time, the latch tooth 5053 is already located at the top of the pull-back groove 5073. At this time, the main fixed cylinder 5 performs a return tightening operation. During the return tightening operation, the ball 5043 of the spring sheet fixing ring 504 is stuck in the arc groove 5022, causing the spring sheet fixing ring 504 to be unable to move, resulting in the fixed concave plate 5045 being unable to be retracted. At this time, the latch tooth 5053 enters the reversing groove 5072. At the same time, the fixed clamping block 5062 is also in the return process. As the process continues, the fixed clamping block 5062 clamps the fixed concave plate 5045, so that the fixed concave plate 5045 is squeezed into the flat card groove 5032. At the same time, the fixed clamping block 5062 causes the fixed concave plate 5045 to be fixed, thereby achieving the purpose of support. As the process continues, the clamping tooth 5053 is clamped from the reversing groove 5072 to the bottom end of the fixed groove 5071, so that the fixed concave plate 5045 is fixed, so that the fixation of the core rod groove in the sand core body 6 can be automatically completed without manual operation.

[0034] At this time, the flow coating operation is performed. After the flow coating is completed, the operation of discharging excess paint is performed. At this time, the rotating component 2 works to drive the clamping frame 3 to deflect by controlling the cylinder, thereby discharging excess paint;

[0035] When the paint discharge operation is completed, the main fixed cylinder 5 is controlled to retract the main conduction rod 505. When retracting the main conduction rod 505, due to the temporary obstruction of the fixed concave plate 5045, the downward pressure operation is first performed. At this time, after the fixed rod 506 is extended to the maximum length, the latch tooth 5053 is already at the top of the fixed groove 5071. At this time, the main fixed cylinder 5 is controlled to perform a return operation. As the main fixed cylinder 5 controls the main conduction rod 505 to contract, the latch tooth 5053 is stuck to the top of the reversing groove 5072. As the process continues, when the latch tooth 5053 is stuck to the bottom of the pull-back groove 5073 and the reversing groove 5072, the latch tooth 5053 is stuck, and then the snap ring 5052 drives the spring piece fixing ring 504 to move upward. 3 and the stretch spring 5042 are used to block it, but since the stretch spring 5042 is continuously retracted by the main conduction rod 505, the stretch spring 5042 is compressed, thereby releasing the blockage of the arc groove 5022. Since the spring fixing ring 504 is pushed upward by the clamping ring 5052, the spring piece 5044 and the fixed concave plate 5045 at the bottom end of the spring fixing ring 504 are retracted. As the return operation continues, the fixed clamping block 5062 of the fixed block 5061 and the clamping groove 5032 of the bottom block 503 are closed, thereby retracting the bottom block 503, so that the fixed rod 506 drives the bottom block 503 to return, and then the stop rod 5031 is retracted into the secondary rod body 502, thereby breaking away from the blockage of the sand core body 6, completing the clamping operation and the releasing operation.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sand core rotary flow coating fixture, comprising a clamping main frame (1), characterized in that: A rotating assembly (2) is fixedly mounted on one side of the clamping main frame (1); a clamping frame (3) is fixedly connected to the bottom end of the clamping main frame (1); the clamping frame (3) is located on a side close to the rotating assembly (2) and a clamping assembly (4) is fixedly mounted on the side adjacent to the rotating assembly (2); a main fixed cylinder (5) is fixedly connected to the middle of the top end of the clamping frame (3); the clamping frame (3) is clamped with a sand core body (6) via the clamping assemblies (4) and the main fixed cylinder (5) on both sides; a main rod body (501) is fixedly connected to the bottom end of the main fixed cylinder (5); the main fixed cylinder (5) is provided with a main output rod (5012); a buffer spring (5011) is fixedly connected to the bottom end of the main output rod (5012); and a secondary rod body (502) is fixedly connected to the bottom end of the buffer spring (5011). The buffer spring (5011) and the secondary rod body (502) are located in the main rod body (501); the main output rod (5012) is movably connected to the middle part of the bottom end with the main conduction rod (505); the bottom end of the secondary rod body (502) is provided with a control chamber (5021); the main conduction rod (505) is fixedly connected to a push ring (5051) on one side of the top of the middle part; the outer wall of the main conduction rod (505) is movably sleeved with a spring fixing ring (504); the outer wall of the spring fixing ring (504) is provided with equidistantly arranged inner grooves (5041); the inner grooves (5041) are each installed with a tension spring (5042); the inner grooves (5041) are located on one side of the tension spring (5042) close to the outer wall of the spring fixing ring (504) and are movably connected with a ball (5043); The inner wall bottom end of the secondary rod body (502) located in the control cavity (5021) is provided with equidistantly arranged circular arc grooves (5022), the circular arc grooves (5022) and the round ball (5043) are movably engaged in the control cavity (5021), the bottom end of the spring sheet fixing ring (504) is fixedly connected with equidistantly arranged spring sheets (5044), the bottom end of the spring sheet (5044) is fixedly welded with a fixed concave plate (5045), the bottom end of the circular arc groove (5022) is provided with a spring sheet passing hole (5023), the fixed concave plate (5045) moves in the spring sheet passing hole (5023), the bottom end of the main conduction rod (505) is movably engaged with a fixed rod (506), and the outer wall of the fixed rod (506) is provided with a bottom block (503); The bottom end of the fixed rod (506) is fixedly connected to a fixed block (5061), the outer wall of the fixed block (5061) is fixedly connected to fixed clamping blocks (5062) arranged at equal distances, the bottom end of the bottom block (503) is provided with a clamping groove (5032), the bottom end of the bottom block (503) is fixedly connected to stop rods (5031) arranged at equal distances, and the bottom end of the secondary rod body (502) is provided with a clamping groove that cooperates with the stop rod (5031).

2. A sand core rotary flow coating fixture according to claim 1, characterized in that: The main conduction rod (505) is located at the bottom end of the spring-type fixing ring (504) and is movably connected to a clamping ring (5052). The inner wall of the clamping ring (5052) is provided with equidistantly arranged clamping teeth (5053). The main conduction rod (505) is provided with a functional groove (507) at the clamping teeth (5053). The functional groove (507) includes a plurality of fixing grooves (5071), a reversing groove (5072) and a retraction groove (5073). The functional grooves (507) provided on the surface of the main conduction rod (505) are arranged in the following order: The top of the fixed groove (5071) is connected to the top of the reversing groove (5072), the bottom of the reversing groove (5072) is connected to the bottom of the pull-back groove (5073), the top of the second reversing groove (5072) is connected to the top of the pull-back groove (5073), the bottom of the second reversing groove (5072) is connected to the middle of the second fixed groove (5071), the top of the second fixed groove (5071) is connected to the top of the third reversing groove (5072), and the connections are made in sequence until the ends are connected.

3. A sand core rotary flow coating fixture according to claim 2, characterized in that: The reversing grooves (5072) are all arranged at an angle, and the projection formed by all the reversing grooves (5072) is circular.

4. A sand core rotary flow coating fixture according to claim 3, characterized in that: The snap ring (5052) moves in the functional groove (507) in the main conduction rod (505) through the snap teeth (5053), and the same side of the snap teeth (5053) is provided with a smooth end (50531). The bottom end of the snap ring (5052) is provided with a reversing spring (5054), and the bottom end of the snap ring (5052) is fixedly connected to the top end of the reversing spring (5054). The bottom end of the groove of the control cavity (5021) is fixedly connected to the bottom end of the reversing spring (5054), and the reversing spring (5054) has the ability to rebound in the positive direction when installed.

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