Double-station transfer manipulator for plastic uptake part

Abstract

The invention discloses a double-station transferring manipulator for plastic uptake parts, relates to the technical field of plastic uptake part forming and transferring, and aims to solve the problems of no-load paths and low transferring efficiency in a reciprocating grabbing and transferring mode. The motor drives the upper rotating disc of the steering table to rotate, the rotating disc rotates to limit the motion trail of a tilting rod and achieve up-down movement of the rotating rod on the support, meanwhile, the rotating disc side guide column, the limiting arc plate and the groove drum make contact to drive the groove drum to regularly rotate at a fixed angle, and finally rotating of the rotating rod is achieved. Compared with a single-track moving manipulator adopting grabbing and placing, the manipulator has the advantages that the transfer rate is increased, clamping plates are driven to apply inward closing force by means of the gravity action of parts on a sliding plate, and the clamping plates are driven to move upwards and downwards to move upwards and downwards. And the overall transfer power consumption of the plastic uptake part is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of plastic blister forming and transporting, in particular to a double-station transporting manipulator for plastic blister parts. Background Art

[0002] Vacuum blister forming is a thermoforming method, a method of manufacturing open plastic shell products using thermoplastic plastic sheets. The plastic sheets are cut into a certain size, heated and softened, and then deformed by the pressure difference and mechanical pressure on both sides of the sheet, and then applied to a specific mold contour surface. After cooling and shaping, and trimming, the blister product is completed.

[0003] Usually, the cooled plastic blister parts need to be uniformly stacked after trimming. The stacking method can save a lot of space and is very convenient for transportation and use. For example, the patent with publication number CN214569175U mentions that the movable receiving plate and suction tray arranged above the first conveyor belt can move the blister parts on the first conveyor belt out of the first conveyor belt and stack the blister parts, thereby realizing the automatic receiving process of the blister parts and improving the receiving efficiency of the automatic blister machine. However, the blister product transfer rate is low by relying solely on the cyclic reciprocating motion of the receiving plate and the suction tray, which easily causes the blister products to be stranded on the conveyor belt. At the same time, compared with the use of suction cups to grab the blister products, the power consumption of the entire transfer and stacking equipment is increased.

[0004] To this end, we propose a double-station transfer robot for plastic blister parts. Summary of the invention

[0005] The purpose of the present invention is to provide a double-station transfer robot for plastic blister parts to solve the problems of the reciprocating grabbing and transferring method proposed in the above background technology, such as the existence of an empty path and low transfer efficiency, and high overall power consumption of the transfer equipment;

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A double-station transfer manipulator for plastic blister parts, comprising a turning platform, a support fixedly connected to the top of the turning platform, a grooved cylinder movably connected to the support, a rotating rod slidably connected inside the support, and one end of the rotating rod respectively penetrates the support and the grooved cylinder and is symmetrically fixed with a rotating telescopic adjustment mechanism by bolts;

[0008] A slide plate is installed at the bottom of the rotating telescopic adjustment mechanism, a gear rod is symmetrically slidably connected to the top of the slide plate, a clamping plate is symmetrically slidably connected to the bottom of the slide plate, one side of the gear rod passes through the through slot on the slide plate and is fixed to the clamping plate by spot welding.

[0009] Furthermore, a sliding sleeve is slidably connected to the outer wall of the support, and one side of the sliding sleeve passes through the notch on the support and is sleeved with the outer wall of the rotating rod.

[0010] Furthermore, a turntable is movably connected to the top of the turning platform, and a roller track is provided on the side of the turntable. A tilting rod is movably connected to the top of the turning platform, one end of the tilting rod is clamped with the roller track, and the other end of the tilting rod is clamped with the sliding sleeve.

[0011] Furthermore, a limit arc plate and a guide column are symmetrically fixed on the central axis of the rotating disk, the limit arc plate abuts against the notches on both sides of the groove drum, and the guide column abuts against the groove on the outer wall of the groove drum.

[0012] Furthermore, the rotation and telescopic adjustment mechanism includes a shell, an upper stop tube, a lower stop tube and an abutment column. One end of the rotating rod is fixed to the shell by bolts, the upper stop tube is fixed to the top inner wall of the shell by bolts, the lower stop tube is fixedly connected to the bottom inner wall of the shell and corresponds to the upper stop tube, the lower stop tube is slidably connected to the inside of the lower stop tube, and the protrusions symmetrically arranged on the outer wall of the abutment column abut against the lower stop tube.

[0013] Furthermore, the rotation and telescopic adjustment mechanism also includes a lock head and a tooth column, one end of the abutment column passes through the shell and is fixed with the lock head by spot welding, and the tooth columns are symmetrically fixed on both sides of the bottom of the shell by bolts.

[0014] Furthermore, a slide plate is slidably connected to the gear column, and the top of the slide plate is symmetrically and movably connected to a transmission gear group through a bearing. The gear on one side of the transmission gear group is meshed with the gear column, and the gear on the other side of the transmission gear group is meshed with the gear rod. A slot block is fixed to the top of the slide plate by spot welding.

[0015] The working method of the double-station transfer robot for plastic blister parts is:

[0016] After the blister molded part is cooled and shaped, the clamping frame is released to remove the molded part. At this time, as the rotary disk rotates, the end of the tilting rod contacts the concave side of the raceway, causing the shell connected to the end of the rotary rod to drop, and the clamping plate at the bottom of the shell contacts the mold table, pushing the entire slide plate to slide on the tooth column, while the clamping plate is located on both sides of the blister molded part;

[0017] As the slide plate slides, it drives the transmission gear set to contact the tooth column, thereby expanding the distance between the two side clamps at the bottom of the slide plate. At the same time, the lock head in the card slot block pushes the entire abutment column from the lower block to the upper block side. Under the abutment of the side of the upper block, the entire lock head and the abutment column rotate 90 degrees.

[0018] As the protruding side of the raceway on the turntable contacts the tilting rod, the entire turnbar is lifted and drives the shell to rise. At this time, the tooth column rises and drives the transmission gear group on the slide plate to rotate. The clamping plate on the gear rod begins to move inward and begins to contact the outer wall of the blister molded part. As the lock head disengages from the slot block, the continuously descending slide plate clamps the clamping plate on the outer wall of the blister molded part. As the guide column on the turntable side contacts the groove on the groove cylinder, the shell continues to rise and carries the blister molded part to rotate 180°. Then the clamping plate unfolds when it contacts the surface of the conveyor belt, and the blister molded part is transported. At the same time, the lock head rotates 90 degrees again and is clamped in the slot block.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, the motor drives the turntable on the steering table to rotate, and the turntable is used to limit the movement trajectory of the tilting rod, so as to realize the up and down movement of the turntable on the support. At the same time, the contact between the turntable side guide column, the limit arc plate and the groove drum is used to drive the groove drum to rotate regularly at a fixed angle, and finally realize the rotation of the turntable, and drive the rotating telescopic adjustment mechanism installed on both sides to rotate alternately and move up and down, so as to provide power for the transportation of the formed plastic blister parts. Compared with the single-track motion manipulator that adopts grabbing and placing, the transportation rate is improved;

[0021] 2. In the present invention, in combination with the up and down activities during the rotation of the rotary rod, during the downward pressing process of the shell, the abutment column is used to contact the upper baffle cylinder to cause rotation, thereby driving the bottom lock head to disengage from the abutment against the slot block on the slide plate, resulting in the subsequent rising process of the shell, the slide plate continues to descend, and the gear rod connected to the clamping plate on the slide plate is driven to slide through the transmission gear group, thereby clamping the plastic blister placed on the mold table on both sides, relying on the gravity of the parts on the slide plate to drive the clamping plate to apply an inward closing force, the plastic blister can be clamped without using a power mechanism, thereby reducing the overall power consumption of the plastic blister transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the double-station transfer robot for plastic blister parts of the present invention;

[0023] Figure 2 This is a schematic diagram of a slide plate installed at the bottom of the rotating telescopic adjustment mechanism of the present invention;

[0024] Figure 3 It is a rear view structural schematic diagram of a double-station transfer robot for plastic blister parts of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the upper raceway of the rotating disk connected to the tilting rod of the present invention;

[0026] Figure 5 This is a schematic diagram of the installation structure of the upper and lower retaining cylinders in the housing of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure in which the transmission gear set on the skateboard of the present invention drives the clamping plate to unfold;

[0028] Figure 7 It is a schematic diagram of the structure in which the slide plate of the present invention descends to drive the clamping plates to clamp the two sides of the blister.

[0029] In the figure: 1. turning platform; 2. support; 3. groove cylinder; 4. rotary rod; 5. rotating telescopic adjustment mechanism; 501. shell; 502. upper stop cylinder; 503. lower stop cylinder; 504. abutment column; 505. lock head; 506. gear column; 6. slide plate; 7. transmission gear set; 8. gear rod; 9. clamping plate; 10. slot block; 11. rotary disk; 12. raceway; 13. guide column; 14. limit arc plate; 15. tilting rod; 16. sliding sleeve. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-7 , the present invention provides a technical solution:

[0032] Embodiment 1: The rolled sheet is pulled into an electric furnace oven and heated to a softened state, and then pulled to the top of the blister mold while hot. The mold is moved up and evacuated, and the softened sheet is adsorbed to the mold surface. At the same time, cooling water is sprayed on the surface of the formed sheet in a mist form to harden it. The formed sheet is then automatically pulled to the storage box, and the pneumatic cutter separates the formed and unformed sheets, thereby completing the entire process;

[0033] As for the transportation of blister parts after molding, Figure 1 As shown, the formed blister on the die table is grabbed by rotating the rotary rod 4 and moving up and down, and the alternating operation of the double-station manipulator further improves the efficiency of transporting the formed blister. In order to control the alternating rotation and up and down movement of the rotary rod 4, the top of the turning table 1 is movably connected to the upper turntable 11, and a roller track 12 is provided on the side of the turntable 11. Figure 4 As shown, the top of the turning platform 1 is in contact with the raceway 12, and the entire tilting rod 15 swings up and down in the raceway 12 along with the rotation of the turntable 11, and the other end of the tilting rod 15 abuts against the sliding sleeve 16 on the support 2, wherein the sliding sleeve 16 is sleeved with the rotating rod 4 slidably connected in the support 2, and the entire rotating rod 4 is controlled by controlling the sliding sleeve 16 to achieve the up and down movement of the entire rotating rod 4;

[0034] The limiting arc plate 14 and the guide column 13 are symmetrically arranged behind the rotary disk 11, and the two are arranged alternately and rotated with the entire rotary disk 11. For the rotation control of the entire rotary rod 4, a groove drum 3 is sleeved and installed on the outer side of the rotary rod 4 on the support 2, and notches are symmetrically opened at the upper and lower extensions of the groove drum 3. At the same time, a groove is opened on the outer wall of the groove drum 3, and the cross-alternating grooves rotate and abut with the guide columns 13 on the side of the rotary disk 11. After the guide columns 13 contact the grooves on the groove drum 3, the entire groove drum 3 is driven to rotate. Since the groove coverage range is 180°, the rotation of the guide columns 13 can realize the 180° rotation of the entire groove drum 3, and complete the 180° rotation and reset after the guide columns 13 on the other side contact. The entire limiting arc plate 14 is arranged to stabilize the groove drum 3 when the guide columns 13 are not in contact. The limiting arc plate 14 is used to clamp the notch on the groove drum 3 to avoid the groove drum 3 from having activities other than the auxiliary rotation of the guide columns 13, so that the rotation of the entire rotary rod 4 is more stable.

[0035] To this end, in combination with the rotation of the entire turntable 11, the limiting arc plate 14 and the guide column 13, when the tilting rod 15 contacts the concave side of the raceway 12, the tilting rod 15 rotates downward to realize the descent of the entire turntable 4 and prevent the groove drum 3 from rotating. At this time, the limiting arc plate 14 begins to contact the upper and lower side notches of the groove drum 3 to limit the entire groove drum 3, and when the entire tilting rod 15 contacts the protruding side of the raceway 12, the upward rotating tilting rod 15 pushes the entire turntable 4 to rise. At this time, the guide column 13 begins to contact the outer wall groove of the groove drum 3, driving the entire turntable 4 to rotate 180°, which also drives the entire turntable 4 to rotate the telescopic adjustment mechanism 5 on both sides to perform alternating activities. Through the rotation of the turntable 11, the entire turntable 4 can be alternately rotated and the height can be adjusted, which is convenient for the subsequent rotation of the telescopic adjustment mechanism 5 to grab and transport the plastic blister parts on the mold platform.

[0036] Embodiment 2: By using the alternate downward pressing working mode of the rotary rod 4, a rotating telescopic adjustment mechanism 5 is installed on both sides of the rotary rod 4, and the shell 501 is pressed downward to realize the placement of the clamping plates 9 on both sides. At the same time, the shell 501 is raised to drive the clamping plates 9 to move, and the plastic blister placed on the mold platform is clamped;

[0037] like Figure 2 As shown, a tooth column 506 is symmetrically fixed at the bottom of the housing 501, and a slide plate 6 is slidably connected to the tooth column 506. An abutment column 504 is installed at the center side of the bottom of the housing 501, and a lock head 505 is fixedly connected to the end of the abutment column 504. Figure 5As shown, under normal conditions, the lock head 505 abuts against the card slot block 10 on the slide plate 6, causing the entire slide plate 6 to be unable to slide down normally on the surface of the tooth column 506. At the same time, a gear rod 8 is symmetrically slidably connected to the top of the slide plate 6, and a transmission gear set 7 is also movably connected to the side of the gear rod 8 and the tooth column 506, wherein a single-side gear on the transmission gear set 7 is meshed and connected to the tooth column 506, and a gear on the other side is meshed and connected to the gear rod 8. The gear rod 8 is located at the bottom of the slide plate 6 and connected to the middle clamping plate 9. Therefore, the gear rod 8 is driven to move on the top of the slide plate 6 by the rotation of the transmission gear set 7, and the clamping plate 9 at the bottom of the slide plate 6 also slides, thereby achieving the clamping work of both ends of the entire plastic blister;

[0038] Combination Figure 5 , Figure 6 and Figure 7 The cam 504 is moved in the opposite direction to the cam 506, and the cam 506 is moved in the opposite direction to the cam 506.

[0039] At this time, the rotary rod 4 starts to drive the shell 501 to rise, and the lock head 505 caused by the 90° rotation is separated from the card slot block 10. As the shell 501 continues to rise, the tooth column 506 contacts the transmission tooth group 7 and drives the tooth rod 8 to reset and slide, and the bottom baffle starts to move to both sides of the plastic blister, and the shell 501 is continuously raised. However, the lock head 505 slides out of the card slot block 10 at this time, causing the slide plate 6 to continue to fall on the tooth column 506. At this time, the tooth rod 8 slides and drives the entire clamping plate 9 to abut against the outer wall of the plastic blister, completing the clamping of the two sides of the plastic blister. At this time, after the rotation of the rotary rod 4, the clamping plate 9 carries the plastic blister to the conveyor belt, and the clamping plate 9 on the other side of the rotary rod 4 can clamp the plastic blister, and the double-station manipulator is used to alternately clamp the materials to increase the transportation rate of the entire plastic blister.

[0040] At the same time, the splint 9 drives the plastic blister to move onto the conveyor belt. During the descent, the plastic blister first contacts the conveyor belt and remains stationary. At this time, the splint 9 and the slide plate 6 drive the entire transmission gear set 7 to rotate during the abutment process, thereby expanding the spacing between the splint 9 and completing the unloading of the plastic blister. At the same time, the continuous descent of the shell 501 causes the lock head 505 to be re-engaged in the slot block 10, and the lock head 505 rotates 90° when the protrusion on the abutment column 504 contacts the edge of the upper baffle cylinder 502, and the lock head 505 rotates in the slot block 10 and re-engages, completing the locking of the slide plate 6 on the tooth column 506 and the transfer and unloading of the plastic blister.

[0041] The working principle of the present invention is as follows: after the blister molded product is cooled and formed, the clamping frame is released to remove the molded product. At this time, as the rotary disk 11 rotates, the end of the tilting rod 15 contacts the concave side of the raceway 12, causing the housing 501 connected to the end of the rotary rod 4 to descend, and the clamping plate 9 at the bottom of the housing 501 contacts the mold platform, pushing the entire slide plate 6 to slide on the tooth column 506, while the clamping plate 9 is located on both sides of the blister molded product;

[0042] As the slide plate 6 slides, the transmission gear set 7 is driven to contact the tooth column 506, thereby expanding the distance between the clamping plates 9 on both sides of the bottom of the slide plate 6. At the same time, the lock head 505 in the slot block 10 pushes the entire abutment column 504 from the lower block 503 to the upper block 502 side. Under the abutment effect of the side of the upper block 502, the entire lock head 505 and the abutment column 504 rotate 90 degrees.

[0043] As the protruding side of the raceway 12 on the rotary disk 11 contacts the tilting rod 15, the entire rotary rod 4 is lifted and drives the shell 501 to rise. At this time, the tooth column 506 rises and drives the transmission gear group 7 on the slide plate 6 to rotate. The clamping plate 9 on the gear rod 8 begins to move inward and begins to contact the outer wall of the blister molded part, and as the lock head 505 disengages from the slot block 10, the continuously descending slide plate 6 realizes the clamping plate 9 on the outer wall of the blister molded part. As the side guide column 13 of the rotary disk 11 contacts the groove on the groove cylinder 3, the shell 501 continues to rise and carries the blister molded part to rotate 180°. Subsequently, the clamping plate 9 unfolds after contacting the surface of the conveyor belt, and the abutment column 504 completes the rotation and reset after contacting the upper blocking cylinder 502, and the blister molded part is transported. At the same time, the lock head 505 rotates 90 degrees again and is clamped in the slot block 10.

[0044] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0046] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A double-station transfer robot for plastic blister parts, comprising a turning platform (1), characterized in that: The top of the turning platform (1) is fixedly connected to a support (2), a grooved cylinder (3) is movably connected to the support (2), a rotating rod (4) is slidably connected inside the support (2), and one end of the rotating rod (4) passes through the support (2) and the grooved cylinder (3) respectively and is symmetrically fixed with a rotating telescopic adjustment mechanism (5) by bolts; A slide plate (6) is installed at the bottom of the rotating telescopic adjustment mechanism (5); a gear rod (8) is symmetrically slidably connected to the top of the slide plate (6); a clamping plate (9) is symmetrically slidably connected to the bottom of the slide plate (6); one side of the gear rod (8) passes through a through groove on the slide plate (6) and is fixed to the clamping plate (9) by spot welding.

2. A double-station transfer robot for plastic blister parts according to claim 1, characterized in that: The outer wall of the support (2) is slidably connected with a sliding sleeve (16), and one side of the sliding sleeve (16) passes through the upper notch of the support (2) and is sleeved with the outer wall of the rotating rod (4).

3. A double-station transfer robot for plastic blister parts according to claim 2, characterized in that: The top of the turning platform (1) is movably connected to a turntable (11), and a rolling track (12) is provided on the side of the turntable (11). The top of the turning platform (1) is movably connected to a tilting rod (15), one end of the tilting rod (15) is clamped to the rolling track (12), and the other end of the tilting rod (15) is clamped to a sliding sleeve (16).

4. A double-station transfer robot for plastic blister parts according to claim 3, characterized in that: A limit arc plate (14) and a guide column (13) are symmetrically fixed on the central axis of the rotating disk (11); the limit arc plate (14) abuts against notches on both sides of the groove drum (3); and the guide column (13) abuts against the groove on the outer wall of the groove drum (3).

5. A double-station transfer robot for plastic blister parts according to claim 4, characterized in that: The rotating telescopic adjustment mechanism (5) comprises a shell (501), an upper stopper tube (502), a lower stopper tube (503) and an abutting column (504); one end of the rotating rod (4) is fixed with the shell (501) by means of bolts; the upper stopper tube (502) is fixed with the upper stopper tube (502) on the top inner wall of the shell (501) by means of bolts; the lower stopper tube (503) is fixedly connected with the upper stopper tube (502) on the bottom inner wall of the shell (501) correspondingly; the abutting column (504) is slidably connected inside the lower stopper tube (503); and protrusions symmetrically arranged on the outer wall of the abutting column (504) abut against the lower stopper tube (503).

6. A double-station transfer robot for plastic blister parts according to claim 5, characterized in that: The rotating telescopic adjustment mechanism (5) further comprises a lock head (505) and a tooth column (506); one end of the abutment column (504) passes through the housing (501) and is fixed with the lock head (505) by spot welding; and the tooth columns (506) are symmetrically fixed to the two sides of the bottom of the housing (501) by bolts.

7. A double-station transfer robot for plastic blister parts according to claim 6, characterized in that: A slide plate (6) is slidably mounted on the tooth column (506), and a transmission gear set (7) is symmetrically and movably connected to the top of the slide plate (6) via a bearing, a gear on one side of the transmission gear set (7) is meshingly connected to the tooth column (506), and a gear on the other side of the transmission gear set (7) is meshingly connected to a gear rod (8), and a slot block (10) is fixed to the top of the slide plate (6) by spot welding.

8. A double-station transfer robot for plastic blister parts according to claim 7, characterized in that: The working method of the double-station transfer robot for plastic blister parts is: After the blister molded product is cooled and shaped, the clamping frame is released to remove the molded product. At this time, as the rotary disk (11) rotates, the end of the tilting rod (15) contacts the concave side of the raceway (12), causing the housing (501) connected to the end of the rotary rod (4) to descend, and the clamping plate (9) at the bottom of the housing (501) contacts the mold platform, pushing the entire slide plate (6) to slide on the tooth column (506), while the clamping plate (9) is located on both sides of the blister molded product; When the slide plate (6) slides, it drives the transmission gear set to contact the tooth column (506), thereby expanding the distance between the clamping plates (9) on both sides of the bottom of the slide plate (6). At the same time, the lock head (505) in the slot block (10) pushes the entire abutment column (504) from the lower block cylinder (503) to the upper block cylinder (502) side. Under the abutment effect of the side of the upper block cylinder (502), the entire lock head (505) and the abutment column (504) rotate 90 degrees. As the protruding side of the rolling track (12) on the rotating disk (11) contacts the tilting rod (15), the entire rotating rod (4) is lifted and drives the housing (501) to rise. At this time, the tooth column (506) rises and drives the transmission gear group on the slide plate (6) to rotate. The clamping plate (9) on the tooth bar (8) begins to move inward and begins to contact the outer wall of the blister molded part. As the lock head (505) disengages from the card slot block (10), the continuously descending slide plate (6) realizes the clamping plate (9) clamping the outer wall of the blister molded part. As the side guide column (13) of the rotating disk (11) contacts the groove on the groove cylinder (3), the housing (501) continues to rise and carries the blister molded part to rotate 180 degrees. Subsequently, the clamping plate (9) is unfolded when it contacts the surface of the conveyor belt, and the blister molded part is transported. At the same time, the lock head (505) rotates 90 degrees again and is clamped in the card slot block (10).

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