A chip collection device based on drilling machine drilling and its use method

Abstract

The present invention relates to the technical field of drilling holes on a drilling machine, and discloses a chip collection device based on drilling holes on a drilling machine and a method for using the device, including a chip collection box and a placement plate, wherein the placement plate is fixedly mounted on the inner wall at the lower end of the chip collection box; a guide frame plate and an elastic rope are provided inside the chip collection box, and a sliding card in the chip collection box is provided with a scraper for collecting chips; a T-shaped groove is provided at the upper end of the placement plate, and an arc groove is provided on the inner wall at the lower end of the T-shaped groove; a scraper rod is placed on the placement plate, and a cleaning bag is provided at the lower end of the scraper rod, and the cleaning bag is located in the T-shaped groove. The present invention provides a cleaning bag to expand in the pushing direction of the cleaning bag, and to concentrate the debris in the arc groove to prevent the debris from leaking along the cleaning bag, and at the same time, the arc-shaped package plate pulls the bonding metal sheet to make the bonding metal sheet on this side better squeezed with the T-shaped groove to achieve a better cleaning effect.

Description

Technical Field

[0001] The invention relates to the technical field of drilling by a drilling machine, and in particular to a chip collecting device based on drilling by a drilling machine and a use method thereof. Background Art

[0002] At present, during mechanical processing, the workpiece needs to be processed on a drilling machine. At the same time, when the drilling machine is drilling, the threaded iron chips continue to grow longer and fall near and on the drilling machine. At the same time, the drilling machine generally has an iron placement plate with a T-slot on the placement plate, and the clamp is fixed on it through the T-slot. Then, when the chips fall into the T-slot, it is difficult to remove them. At the same time, under the action of the cutting fluid, the chips adhere to the inner wall, making it even more difficult to remove them. When cutting metals of different materials, the chip fluids generated are different. For example, the chips generated by copper are in powder form and are more easily adhered to the T-slot, which affects the installation of the clamp and is difficult to clean. Therefore, a chip collection device based on drilling on a drilling machine and a method for using the same are proposed. Summary of the invention

[0003] The object of the present invention is to provide a chip collection device based on drilling by a drilling machine and a method of using the same, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a chip collection device based on drilling on a drilling machine, comprising a chip collection box and a placement plate, wherein the placement plate is fixedly mounted on the inner wall of the lower end of the chip collection box;

[0005] The interior of the chip collecting box is provided with a guide frame plate and an elastic rope, and the sliding card in the chip collecting box is provided with a scraper for collecting chips;

[0006] A T-shaped groove is provided at the upper end of the placement plate, an arc groove is provided on the inner wall of the lower end of the T-shaped groove, a scraper rod is placed on the placement plate, a cleaning bag is provided at the lower end of the scraper rod, and the cleaning bag is located in the T-shaped groove.

[0007] Preferably, the guide frame plate is arranged around the placement plate, and the corners of the guide frame plate are arranged to extend outward, and the corners of the guide frame plate are fixedly connected to the inner wall of the chip collection box;

[0008] Metal balls are welded on both the upper and lower sides of the guide frame plate, and the metal balls on the upper and lower sides are staggered. The staggered metal balls can make the guide frame plate move to one side in an up-and-down manner.

[0009] Preferably, the guide frame plate passes through the scraper, and the scraper can slide and can be squeezed with the metal ball;

[0010] An outer bag is fixedly installed on the outer wall of the lower end of the scraper, and the two ends of the outer bag extend upward to both sides of the scraper. The outer bag is extruded with the inner wall of the chip collecting box, and L-shaped scrapers are welded on both sides of the scraper. One end of the L-shaped scraper is flush with the edge of the scraper. The L-shaped scraper has an elastic setting and can be hooked by the stuck debris, and the L-shaped scraper can be bent at the same time, and then bounce to one side to eject the debris.

[0011] Preferably, there are four scrapers, which are respectively located in four directions of the placement plate, the elastic rope is located on the inner side of the guide frame plate, and the elastic rope loop is arranged on the placement plate;

[0012] The scrapers on the front and rear sides are fixedly connected with elastic ropes, and the elastic ropes penetrate the scrapers on the other two sides. The scrapers on the other two sides can be slidably arranged. The scrapers on the other two sides are provided with card balls on both sides, and the card balls are fixedly connected with the elastic ropes. The card balls are 10 cm away from the scrapers on the other two sides. When the scrapers on the front and rear sides move, the scrapers on the two sides do not move and then move after the card balls contact. Therefore, the scrapers on both sides can move, and the movement distances are inconsistent.

[0013] The side corners of the placement plate are provided with rounded openings, and the elastic rope is clamped in the rounded openings to prevent the elastic rope from breaking and reduce friction and extrusion of the elastic rope.

[0014] Preferably, the scraper rod has a symmetrically arranged scraping opening at the lower end thereof, and the scraping opening is a quarter of a circle. An elongated bag is fixedly installed in the scraping opening, and the lower end of the elongated bag is arranged parallel to the lower end surface of the scraper rod, so that the debris can be stuck in the scraping opening and squeezed by the elongated bag at the same time, thereby reducing the movement of the debris.

[0015] Preferably, a vertical connecting rod is welded to the lower end of the scraper rod, and the vertical connecting rod extends downward to the interior of the cleaning bag. Both sides of the cleaning bag are provided with fitting metal sheets. The lower end of the cleaning bag is fixedly connected with a semicircular metal, and the semicircular metal is located in the arc groove. The semicircular metal achieves a limiting effect. At the same time, the semicircular metal can push the debris and also concentrate the debris.

[0016] Preferably, arc-shaped wrapping plates are fixedly installed on the four side lines of the cleaning bag, and the arc-shaped wrapping plates are fitted with the inner wall of the T-shaped slot. Metal connecting rods are fixedly connected to both sides of the arc-shaped wrapping plates, and the ends of the metal connecting rods are fixedly connected to the fitting metal sheets. The fitting metal sheets are fitted with the inner wall of the T-shaped slot, and the fitting metal sheets produce a scraping effect, and at the same time, the fitting metal sheets are squeezed with the T-shaped slot to produce a certain friction;

[0017] The laminated metal sheet has a rectangular frame, and the upper and lower sides of the laminated metal sheet are arc-shaped protrusions. The laminated metal sheet has an elastic setting, and the laminated metal sheet can be affected by the force of the inclination change of the arc-shaped cladding plate, so that the laminated metal sheet is deformed.

[0018] Preferably, two partitions are vertically fixedly installed inside the cleaning bag, the vertical connecting rod is located between the two partitions, and built-in bags are fixedly connected to the opposite sides of the two partitions. The built-in bags are expanded, and one side of the built-in bags is fixedly connected to the vertical connecting rod, and the built-in bags are connected to the other side of the partition, so that when the vertical connecting rod moves, the built-in bags on one side are pushed, and at the same time, the built-in bags on the other side are stretched, so that the side on the pushing direction expands, fits better with the T-slot, and handles debris more effectively.

[0019] A method for using a chip collection device based on drilling a hole on a drilling machine comprises the following steps:

[0020] Step 1: scrape the chips on the placement plate by pushing the scraper rod downward;

[0021] Step 2: As the cleaning capsule moves, the internal capsule is squeezed, one side is larger than the other side, so that the debris is concentrated in the arc groove;

[0022] Step 3: The metal sheet is fitted with the T-slot, and the cleaning bag is pulled to make the arc-shaped package plate tilted. The arc-shaped package plate pulls the metal sheet so that the metal sheet on this side can be better squeezed with the T-slot for better cleaning;

[0023] Step 4: Pull the scraper at the front end so that all four scrapers can move to collect the debris;

[0024] Step 5: Pull the scraper at the front end to make the scraper vibrate up and down and the L-shaped scraper bounce to collect the debris.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention provides a metal ball to make the scraper vibrate up and down during its movement, thereby preventing debris from being stuck between the scraper and the chip box. An L-shaped scraper is provided to make the scraper bounce the stuck debris during its movement, thereby ensuring that the debris can be scraped off. An outer bag is provided to protect the scraper and the chip box from being scratched while allowing the debris to move.

[0027] (2) The present invention pulls the scraper at the front end so that all four scrapers can move, scraping the debris into the corner for easy collection.

[0028] (3) The present invention sets a cleaning bag so that the outer side of the cleaning bag will not fit into the T-slot, and the fitting metal sheet will still fit into the T-slot, or it can expand on one side and contract on the other side, so that the arc-shaped wrapping plate is tilted. The arc-shaped wrapping plate pulls the fitting metal sheet so that the fitting metal sheet on this side can be better squeezed with the T-slot, thereby achieving a better cleaning effect.

[0029] (4) The present invention provides a built-in bag. As the cleaning bag moves, the vertical connecting rod pushes the built-in bag on one side, one side of a partition expands, and the other side of the partition contracts, so that the cleaning bag expands in the pushing direction and squeezes the T-shaped groove to facilitate pushing out the debris. The semicircular metal slide has a stabilizing effect and concentrates the debris in the arc groove to prevent the debris from leaking along the cleaning bag.

[0030] (5) The present invention can scrape the chips on the placement plate into the scraping mouth by pushing the scraper rod downward, and clamp it under the long bag to prevent the chips from sliding on the placement plate when pushed, so that the chips will bounce and ensure the safety of the cleaning personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the scraper structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the placement plate of the present invention;

[0034] Figure 4 This is a schematic diagram of the scraper rod and cleaning bag structure of the present invention;

[0035] Figure 5 It is a schematic diagram of the cross-sectional structure of the scraper rod of the present invention;

[0036] Figure 6 This is a schematic diagram of a half-section structure of the cleaning capsule of the present invention;

[0037] Figure 7 A flow chart is used for the present invention.

[0038] In the figure: 1. chip box; 2. guide frame plate; 21. metal ball; 3. elastic rope; 31. card ball; 4. scraper; 41. outer bag; 42. L-shaped scraper; 5. placement plate; 51. round mouth; 52. T-shaped groove; 53. arc groove; 6. scraper rod; 61. scraper mouth; 62. long bag; 7. cleaning bag; 71. vertical connecting rod; 72. arc-shaped package plate; 73. metal connecting rod; 74. fitting metal sheet; 75. partition; 76. built-in bag; 77. semicircular metal. DETAILED DESCRIPTION

[0039] 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.

[0040] Embodiment 1:

[0041] like Figure 1-6 As shown, the present invention is a chip collecting device based on drilling on a drilling machine, comprising a chip collecting box 1 and a placing plate 5, wherein the placing plate 5 is fixedly mounted on the inner wall of the lower end of the chip collecting box 1;

[0042] A guide frame plate 2 and an elastic rope 3 are provided inside the chip collecting box 1, and a scraper 4 for collecting chips is provided on a sliding card inside the chip collecting box 1;

[0043] A T-shaped groove 52 is formed at the upper end of the placement plate 5 , and an arc groove 53 is formed on the inner wall of the lower end of the T-shaped groove 52 . A scraper rod 6 is placed on the placement plate 5 , and a cleaning capsule 7 is formed at the lower end of the scraper rod 6 . The cleaning capsule 7 is located in the T-shaped groove 52 .

[0044] The guide frame plate 2 is arranged around the placement plate 5, and the corners of the guide frame plate 2 are arranged to extend outward, and the corners of the guide frame plate 2 are fixedly connected to the inner wall of the chip collection box 1;

[0045] Metal balls 21 are welded to both the upper and lower sides of the guide frame plate 2 , and the metal balls 21 on the upper and lower sides are staggered.

[0046] The guide frame plate 2 passes through the scraper 4, and the scraper 4 can slide and can be pressed against the metal ball 21. By providing the metal ball 21, the scraper 4 generates up and down vibrations during the movement, thereby preventing the debris from being stuck between the scraper 4 and the chip collecting box 1;

[0047] An outer bag 41 is fixedly installed on the outer wall of the lower end of the scraper 4, and the two ends of the outer bag 41 extend upward to the two sides of the scraper 4. The outer bag 41 is squeezed with the inner wall of the chip collecting box 1. The outer bag 41 can protect the scraper 4 and the chip collecting box 1 from being scratched, and at the same time, the debris can be moved. L-shaped scrapers 42 are welded on both sides of the scraper 4, and one end of the L-shaped scraper 42 is flush with the edge of the scraper 4. The L-shaped scraper 42 has an elastic setting. The L-shaped scraper 42 is set so that the scraper 4 can bounce the stuck debris during the movement to ensure that the debris can be scraped off.

[0048] There are four scrapers 4, which are respectively located in four directions of the placement plate 5. The elastic rope 3 is located on the inner side of the guide frame plate 2, and the elastic rope 3 is sleeved on the placement plate 5.

[0049] The scrapers 4 on the front and rear sides are fixedly connected with the elastic rope 3, and the elastic rope 3 runs through the scrapers 4 on the other two sides. The scrapers 4 on the other two sides can be slidably arranged, and the two side surfaces of the scrapers 4 on the other two sides are provided with a card ball 31, which is fixedly connected with the elastic rope 3, and the card ball 31 is ten centimeters away from the scrapers 4 on the other two sides. By pulling the scraper 4 at the front end, the four scrapers 4 can all move, and the debris is scraped into the corner for easy collection;

[0050] A rounded opening 51 is formed on the side corner of the placement plate 5 , and the elastic rope 3 is clamped in the rounded opening 51 .

[0051] A symmetrical scraping opening 61 is provided at the lower end of the scraper rod 6, and the scraping opening 61 is a quarter of a circle. An elongated bag 62 is fixedly installed in the scraping opening 61, and the lower end of the elongated bag 62 is arranged parallel to the lower end surface of the scraper rod 6. By pushing the scraper rod 6 downward, the chips on the placement plate 5 can be scraped into the scraping opening 61 and stuck under the elongated bag 62 to prevent squeezing and sliding on the placement plate 5 during pushing, so that the chips will bounce, thereby ensuring the safety of the cleaning personnel.

[0052] A vertical connecting rod 71 is welded to the lower end of the scraper rod 6, and the vertical connecting rod 71 extends downward to the interior of the cleaning capsule 7. Both sides of the cleaning capsule 7 are provided with fitting metal sheets 74. The lower end of the cleaning capsule 7 is fixedly connected with a semicircular metal 77, and the semicircular metal 77 is located in the arc groove 53.

[0053] The four sides of the cleaning capsule 7 are fixedly installed with arc-shaped wrapping plates 72, which are fitted with the inner wall of the T-shaped slot 52. Both sides of the arc-shaped wrapping plates 72 are fixedly connected with metal connecting rods 73, and the ends of the metal connecting rods 73 are fixedly connected with the fitting metal sheets 74, which are fitted with the inner wall of the T-shaped slot 52.

[0054] The fitting metal sheet 74 is provided with a rectangular frame, and the upper and lower sides of the fitting metal sheet 74 are provided with arc-shaped protrusions. The fitting metal sheet 74 has an elastic setting. By providing the cleaning capsule 7, the outer side of the cleaning capsule 7 will not fit into the T-slot 52, and the fitting metal sheet 74 will still fit into the T-slot 52, and it can also expand on one side and contract on the other side, so that the arc-shaped wrapping plate 72 is in an inclined state. The arc-shaped wrapping plate 72 pulls the fitting metal sheet 74 so that the fitting metal sheet 74 on this side can be better squeezed with the T-slot 52, so as to achieve a better cleaning effect.

[0055] Two partitions 75 are vertically fixedly installed inside the cleaning capsule 7, and the vertical connecting rod 71 is located between the two partitions 75. The opposite sides of the two partitions 75 are fixedly connected with built-in capsules 76. The built-in capsules 76 are set to expand, and one side of the built-in capsules 76 is fixedly connected to the vertical connecting rod 71, and the built-in capsules 76 are connected to the other side of the partition 75. By setting the built-in capsules 76, as the cleaning capsule 7 moves, the vertical connecting rod 71 pushes the built-in capsules 76 on one side, one side of one partition 75 expands, and the other side of the other partition 75 contracts, so that the cleaning capsule 7 expands in the pushing direction and squeezes the T-shaped groove 52 to facilitate the expulsion of debris, and the sliding of the semicircular metal 77 presents a stabilizing effect and concentrates the debris in the arc groove 53 to prevent the debris from leaking along the cleaning capsule 7.

[0056] When in use, the chips fall into the T-shaped groove 52, and the scraper rod 6 is pushed down to move along the upper end surface of the placement plate 5, and the chips on the placement plate 5 can be scraped into the scraper opening 61, and the chips can also be stuck under the long bag 62, so that the long bag 62 squeezes the chips, so that the chips are pushed well, and the chips are prevented from sliding on the placement plate 5 when pushed, and the chips are bounced, thereby ensuring the safety of the cleaning personnel;

[0057] Then, the cleaning capsule 7 moves, so that the vertical connecting rod 71 pushes the built-in capsule 76 on one side, and the built-in capsule 76 on the other side is stretched, so that one side of a partition 75 expands, and the other side of the partition 75 contracts, so that the cleaning capsule 7 expands in the pushing direction and squeezes the T-shaped groove 52, so that the debris is pushed out, and the semicircular metal 77 slides to present a stabilizing effect, and the debris is concentrated in the arc groove 53 to prevent the debris from leaking along the cleaning capsule 7;

[0058] At the same time, during long-term work, the outer side of the cleaning capsule 7 will not fit into the T-shaped groove 52. In this case, during the movement, the fitting metal sheet 74 is still fitted into the T-shaped groove 52. Therefore, one side can be expanded and the other side can be contracted. Therefore, the arc-shaped package plate 72 is tilted, so that one end fits more tightly and the other end is loose. Therefore, the arc-shaped package plate 72 on the side that fits more tightly pulls the fitting metal sheet 74 so that the fitting metal sheet 74 on this side is better squeezed with the T-shaped groove 52, thereby achieving a better cleaning effect.

[0059] Then, the scraper 4 at the front end is pulled back and forth, so that the scraper 4 pulls the elastic rope 3, so that the elastic rope 3 moves along the rounded opening 51, and at the same time, a card ball 31 is arranged so that the four scrapers 4 can all move, and the debris is scraped into the corner for easy collection;

[0060] A metal ball 21 is provided to squeeze the scraper 4, causing the scraper 4 to vibrate up and down during movement to prevent debris from being stuck between the scraper 4 and the chip box 1. An L-shaped scraper 42 is provided to cause the scraper 4 to bounce the stuck debris during movement to ensure that the debris can be scraped off. An outer bag 41 is provided to protect the scraper 4 and the chip box 1 from being scratched while allowing the debris to move.

[0061] Embodiment 2:

[0062] like Figure 7 As shown, a method for using a chip collection device based on drilling a hole on a drilling machine comprises the following steps:

[0063] Step 1, scraping the chips on the placement plate 5 by pushing the scraper rod 6 downward;

[0064] Step 2: As the cleaning capsule 7 moves, the internal capsule 76 is squeezed, with one side becoming larger and the other side becoming smaller, so that the debris is concentrated in the arc groove 53;

[0065] Step 3: The metal sheet 74 is fitted with the T-slot 52, and the cleaning capsule 7 is pulled to make the arc-shaped package plate 72 tilted. The arc-shaped package plate 72 pulls the metal sheet 74 so that the metal sheet 74 on this side is better squeezed with the T-slot 52 for better cleaning;

[0066] Step 4: pull the scraper 4 at the front end so that all four scrapers 4 can move to collect the debris;

[0067] Step 5: Pull the scraper 4 at the front end to vibrate the scraper 4 up and down and bounce the L-shaped scraper 42 to collect the debris.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chip collection device based on drilling on a drilling machine, comprising a chip collection box (1) and a placement plate (5), characterized in that: The placement plate (5) is fixedly mounted on the inner wall of the lower end of the chip collecting box (1); The chip collecting box (1) is provided with a guide frame plate (2) and an elastic rope (3) inside, and a sliding card inside the chip collecting box (1) is provided with a scraper (4) for collecting chips; The upper end of the placement plate (5) is provided with a T-shaped groove (52), the lower inner wall of the T-shaped groove (52) is provided with an arc-shaped groove (53), a scraper rod (6) is placed on the placement plate (5), a cleaning bag (7) is provided at the lower end of the scraper rod (6), and the cleaning bag (7) is located in the T-shaped groove (52); The guide frame plate (2) is arranged around the placement plate (5), and the corners of the guide frame plate (2) are arranged to extend outwards, and the corners of the guide frame plate (2) are fixedly connected to the inner wall of the chip collection box (1); Metal balls (21) are welded to the upper and lower sides of the guide frame plate (2), and the metal balls (21) on the upper and lower sides are arranged in a staggered manner; The guide frame plate (2) penetrates the scraper (4), and the scraper (4) is capable of sliding and being pressed against the metal ball (21); An outer bag (41) is fixedly mounted on the outer wall of the lower end of the scraper (4), and the two ends of the outer bag (41) extend upward to the two sides of the scraper (4). The outer bag (41) is extruded and arranged with the inner wall of the chip collecting box (1). L-shaped scrapers (42) are welded on both sides of the scraper (4), and one end of the L-shaped scraper (42) is flush with the edge of the scraper (4). The L-shaped scraper (42) is elastically arranged; There are four scrapers (4), and the four scrapers (4) are respectively located in four directions of the placement plate (5); the elastic rope (3) is located on the inner side of the guide frame plate (2), and the elastic rope (3) is sleeved on the placement plate (5); The scrapers (4) on the front and rear sides are fixedly connected to the elastic rope (3), the elastic rope (3) passes through the scrapers (4) on the other two sides, the scrapers (4) on the other two sides can be slidably arranged, and the two side surfaces of the scrapers (4) on the other two sides are provided with a clamping ball (31), the clamping ball (31) is fixedly connected to the elastic rope (3), and the clamping ball (31) is ten centimeters away from the scrapers (4) on the other two sides; A rounded opening (51) is provided on the side corner of the placement plate (5), and the elastic rope (3) is clamped in the rounded opening (51).

2. A chip collection device based on drilling on a drilling machine according to claim 1, characterized in that: The lower end of the scraper rod (6) is provided with a symmetrically arranged scraper opening (61), the scraper opening (61) is in the form of a quarter of a circle, an elongated bag (62) is fixedly installed in the scraper opening (61), and the lower end of the elongated bag (62) is arranged parallel to the lower end surface of the scraper rod (6).

3. The chip collection device based on drilling on a drilling machine according to claim 1, characterized in that: A vertical connecting rod (71) is welded to the lower end of the scraper rod (6), and the vertical connecting rod (71) extends downward to the interior of the cleaning bag (7). Both sides of the cleaning bag (7) are provided with fitting metal sheets (74). The lower end of the cleaning bag (7) is fixedly connected with a semicircular metal (77), and the semicircular metal (77) is located in the arc groove (53).

4. The chip collection device based on drilling on a drilling machine according to claim 3, characterized in that: The four side lines of the cleaning bag (7) are fixedly installed with arc-shaped wrapping plates (72), and the arc-shaped wrapping plates (72) are fitted with the inner wall of the T-shaped slot (52). Both sides of the arc-shaped wrapping plates (72) are fixedly connected with metal connecting rods (73), and the ends of the metal connecting rods (73) are fixedly connected with fitting metal sheets (74), and the fitting metal sheets (74) are fitted with the inner wall of the T-shaped slot (52); The bonding metal sheet (74) is arranged in a rectangular frame, the upper and lower sides of the bonding metal sheet (74) are arranged in an arc-shaped protrusion, and the bonding metal sheet (74) is elastically arranged.

5. The chip collection device based on drilling on a drilling machine according to claim 3, characterized in that: Two partitions (75) are vertically fixedly installed inside the cleaning bag (7), the vertical connecting rod (71) is located between the two partitions (75), and the two partitions (75) are fixedly connected to the opposite sides with built-in bags (76), the built-in bags (76) are inflated, one side of the built-in bags (76) is fixedly connected to the vertical connecting rod (71), and the built-in bags (76) are connected to the other side of the partition (75).

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