Oil sprinkling device for pneumatic tyred roller

Abstract

The invention discloses an oil sprinkling device for a pneumatic tyred roller, and particularly relates to the technical field of road construction equipment.The oil sprinkling device comprises a fixing frame, an inner shell is rotatably connected to the inner side of the fixing frame, and a middle nozzle is fixedly connected to the middle of the bottom of the inner shell; a right nozzle and a left nozzle are slidably connected to the positions, located on the two sides of the middle nozzle, of the bottom of the inner shell correspondingly, a left baffle plate and a right baffle plate are rotatably connected to the outer sides of the right nozzle and the left nozzle correspondingly, a second electric push rod is started, a special-shaped plate is conveniently pushed to swing left and right, and under the cooperation effect of a tooth groove and an arc-shaped rack, the special-shaped plate can be driven to swing left and right. Through the rotary connection of a first traction arm and a second traction arm, a left material baffle and a right material baffle on the two sides are conveniently and synchronously dragged to move in the opposite direction or in the opposite direction, so that the distance between a right nozzle and a left nozzle is adjusted, and the oil liquid coverage range is favorably controlled according to the tire width; and the problem of edge leakage or middle accumulation caused by traditional fixed spacing is avoided.

Description

Technical Field

[0001] This invention relates to the field of road construction equipment technology, specifically to an oil spraying device for a tire roller. Background Technology

[0002] During construction, asphalt mixtures are typically 160-180℃ in temperature and are in a molten state, exhibiting strong adhesion. When the rubber tires of a pneumatic tire roller roll over the hot asphalt pavement, the asphalt quickly adheres to the tire surface, causing a sticky phenomenon. However, the oil spraying device sprays vegetable oil or other liquids onto the tire surface, forming an oil film that prevents the hot asphalt concrete from sticking to the tire.

[0003] Currently, the fixed angle and spacing between nozzles in the oil spraying device make it difficult to evenly cover the tire surface during spraying. For example, the tire edges may not receive enough oil, while the middle part may have too much oil, affecting the anti-sticking effect. This causes some areas of the tire to stick to the asphalt mixture during compaction, affecting the construction quality. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A fuel spraying device for a tire roller includes:

[0006] A fixed frame is provided, with four mounting seats connected to its back side. An inner shell is rotatably connected to the inner side of the fixed frame. A first hinge seat is connected to the top of the inner shell. A first electric push rod is rotatably connected to the outer side of the first hinge seat. A second hinge seat is rotatably connected to the bottom of the first electric push rod. The second hinge seat is fixedly connected to the fixed frame.

[0007] A first through hole is provided at the middle of the bottom of the inner shell. A middle nozzle is fixedly connected inside the first through hole. A pair of movable holes are provided on both sides of the middle nozzle at the bottom of the inner shell. A right nozzle and a left nozzle are slidably connected inside the pair of movable holes. An oil supply mechanism is provided on the top of the middle nozzle, the right nozzle and the left nozzle.

[0008] The left and right baffle plates are rotatably connected to the outer sides of the right and left nozzles, respectively, and a drive mechanism is provided on the top of the left and right baffle plates.

[0009] In one possible implementation, the drive mechanism includes a back plate, the top of which is fixedly connected to the top surface of the inner wall of the inner shell. A second electric push rod is connected to one side of the back plate. The output end of the second electric push rod is rotatably connected to a fifth limiting shaft. A shaped plate is fixedly connected to the top of the fifth limiting shaft. A second shaft is rotatably connected inside the shaped plate. The top of the second shaft is fixedly connected to the top surface of the inner wall of the inner shell. A toothed groove is formed on the outer side of the shaped plate. An arc-shaped rack is meshed with the outer side of the toothed groove. A disc is fixedly connected to the inner side of the arc-shaped rack. A second traction arm and a first traction arm are rotatably connected to the bottom of the disc. One end of the second traction arm and the first traction arm are rotatably connected to the left baffle plate and the right baffle plate, respectively.

[0010] In one possible implementation, the bottom of the disc is symmetrically connected to a first limiting shaft and a second limiting shaft. The first limiting shaft is rotatably connected to a first traction arm, and the second limiting shaft is rotatably connected to a second traction arm. The tops of the left and right baffles are respectively connected to a third limiting shaft and a fourth limiting shaft. The third and fourth limiting shafts are rotatably connected to the other ends of the second and first traction arms, respectively.

[0011] In one possible implementation, a circular slider is connected to the top of the disk, and a circular guide rail is slidably connected to the top of the circular slider. The top of the circular guide rail is fixedly connected to the top surface of the inner wall of the inner shell.

[0012] In one possible implementation, a pair of elongated sliders are connected to the bottom of both the left and right baffles, and a slide rail is slidably connected to the bottom of the elongated sliders. The slide rail is fixedly connected to the bottom surface of the inner wall of the inner shell.

[0013] In one possible implementation, bearings are connected to both the side walls of the left and right baffles, and a third shaft is rotatably connected inside a pair of bearings. One end of the third shaft is fixedly connected to a collar, and the inner walls of the pair of collars are respectively fixedly connected to the right nozzle and the left nozzle.

[0014] In one possible implementation, a motor is connected to the top of both the left and right baffle plates. One end of the motor output shaft is connected to a second synchronous pulley. A synchronous belt is sleeved on the outer side of the second synchronous pulley. A first synchronous pulley is connected to the inner side of the synchronous belt. The inner side of the first synchronous pulley is fixedly connected to a third shaft.

[0015] In one possible implementation, the motor and the fourth limiting shaft are arranged to be positioned to the left and right.

[0016] In one possible implementation, the oil supply mechanism includes an oil reservoir, an oil pump connected to the top of the oil reservoir, a second oil delivery hose and a first oil delivery hose connected to the left and right sides of the oil pump respectively, one end of the first oil delivery hose extending into the interior of the oil reservoir, one end of the second oil delivery hose connected to an oil distribution pipe, and three third oil delivery hoses connected horizontally in sequence to the bottom of the oil distribution pipe, one end of each of the three third oil delivery hoses penetrating the top of the inner shell and being fixedly connected to the left nozzle, the middle nozzle and the right nozzle respectively.

[0017] In one possible implementation, a shaft hole is provided on one side of the inner shell, and a first shaft is rotatably connected inside the shaft hole. The two ends of the first shaft are respectively fixedly connected to the inner wall of the fixing frame.

[0018] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0019] 1. By activating the second electric push rod, the irregular plate can be easily pushed to swing left and right. With the cooperation of the toothed groove and the arc-shaped rack, the disc can be further rotated left and right. Then, through the rotation connection of the first traction arm and the second traction arm at the bottom of the disc, the left and right baffles on both sides can be moved towards each other or away from each other, thereby adjusting the distance between the right nozzle and the left nozzle. This is beneficial for controlling the oil coverage range according to the tire width and avoiding the edge leakage or middle accumulation problems caused by the traditional fixed spacing.

[0020] 2. By turning on the motor, the third shaft and the collar at one end can be easily driven to rotate through the cooperation between the first synchronous pulley, the synchronous belt and the second synchronous pulley. This allows for the adjustment of the nozzle angles on both sides, which is beneficial for adapting to the spraying needs of different construction scenarios. For example, by increasing the nozzle elevation angle, it is helpful to avoid oil leakage on the upper part of the tire due to gravity. On the other hand, when the asphalt viscosity is high, by adjusting the spray angle, the impact force of the oil on the tire tread is enhanced, ensuring uniform adhesion of the adhesive layer. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is one of the overall structural schematic diagrams of the present invention;

[0023] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0024] Figure 3This is an exploded view of the inner shell and the fixing frame of the present invention;

[0025] Figure 4 This is one of the top cross-sectional views of the inner shell of the present invention;

[0026] Figure 5 This is a second top sectional view of the inner shell of the present invention;

[0027] Figure 6 For the present invention Figure 4 Exploded view of the circular guide rail and the circular slider;

[0028] Figure 7 This is a bottom view of the circular guide rail and circular slider of the present invention;

[0029] Figure 8 This is one of the schematic diagrams of the overall structure of the left baffle plate, right baffle plate and disc of the present invention;

[0030] Figure 9 This is a second schematic diagram of the overall structure of the left baffle plate, right baffle plate, and disc of the present invention;

[0031] Figure 10 This is an exploded view of the collar and right baffle of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Oil reservoir; 2. First oil delivery hose; 3. Oil pump; 4. Second oil delivery hose; 5. Fixing bracket; 6. Inner shell; 7. First hinge seat; 8. First electric actuator; 9. Mounting base; 10. Second hinge seat; 11. Movable hole; 12. Right nozzle; 13. Middle nozzle; 14. Left nozzle; 15. First through hole; 16. Shaft hole; 17. Third oil delivery hose; 18. First shaft; 19. Oil distribution pipe; 20. Back plate; 21. Second electric actuator; 22. Irregular plate; 23. Left baffle plate; 24. Circular 25. Guide rail; 26. Right baffle plate; 27. Toothed groove; 28. Second shaft; 29. ​​Circular slider; 30. Slide rail; 31. Arc-shaped rack; 32. Disc; 33. First limiting shaft; 34. Second limiting shaft; 35. First traction arm; 36. Second traction arm; 37. Third limiting shaft; 38. Fourth limiting shaft; 39. Fifth limiting shaft; 40. Long strip slider; 41. Third shaft; 42. First synchronous pulley; 43. Bearing; 44. Synchronous belt; 45. Second synchronous pulley; 46. Motor; 47. Collar. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] This application provides an oil spraying device for tire rollers, which solves the problems in the prior art.

[0036] The technical solution in this application is to solve the above problems, and the overall approach is as follows:

[0037] like Figures 1-10 As shown, a fuel spraying device for a tire roller includes:

[0038] The fixed frame 5 has four mounting seats 9 connected to its back side. The inner shell 6 is rotatably connected to the inner side of the fixed frame 5. The top of the inner shell 6 is connected to the first hinge seat 7. The outer side of the first hinge seat 7 is rotatably connected to the first electric push rod 8. The bottom of the first electric push rod 8 is rotatably connected to the second hinge seat 10. The second hinge seat 10 is fixedly connected to the fixed frame 5. By setting four mounting seats 9, it is convenient to fix the fixed frame 5 to the top of the tire of the tire roller.

[0039] A first through hole 15 is provided at the bottom center of the inner shell 6. A middle nozzle 13 is fixedly connected inside the first through hole 15. A pair of movable holes 11 are provided at the bottom of the inner shell 6 on both sides of the middle nozzle 13. A right nozzle 12 and a left nozzle 14 are slidably connected inside the pair of movable holes 11. An oil supply mechanism is provided on the top of the middle nozzle 13, the right nozzle 12 and the left nozzle 14.

[0040] Left baffle plate 23 and right baffle plate 25 are rotatably connected to the outer sides of right nozzle 12 and left nozzle 14, respectively. A drive mechanism is provided on the top of left baffle plate 23 and right baffle plate 25. By setting left baffle plate 23 and right baffle plate 25, it is beneficial to prevent impurities such as asphalt from entering the inner shell 6 through the interior of the movable hole 11, thus achieving the effect of material blocking.

[0041] In some examples, the drive mechanism includes a back plate 20, the top of which is fixedly connected to the top surface of the inner wall of the inner shell 6. A second electric push rod 21 is connected to one side of the back plate 20. The output end of the second electric push rod 21 is rotatably connected to a fifth limiting shaft 38. The top end of the fifth limiting shaft 38 is fixedly connected to a profiled plate 22. A second shaft 27 is rotatably connected inside the profiled plate 22. The top of the second shaft 27 is fixedly connected to the top surface of the inner wall of the inner shell 6. A toothed groove 26 is provided on the outer side of the profiled plate 22. An arc-shaped rack 30 is meshed on the outer side of the toothed groove 26. A disc 31 is fixedly connected to the inner side of the arc-shaped rack 30. The bottom of the disc 31 rotates... The device is connected by a second traction arm 35 and a first traction arm 34. One end of the second traction arm 35 and the first traction arm 34 are rotatably connected to the left baffle plate 23 and the right baffle plate 25, respectively. When the second electric push rod 21 is activated, it is convenient to push the irregular plate 22 to swing left and right. With the cooperation between the toothed groove 26 and the arc-shaped rack 30, it is convenient to further drive the disc 31 to rotate left and right. Then, through the rotational connection of the first traction arm 34 and the second traction arm 35 at the bottom of the disc 31, it is convenient to synchronously pull the left baffle plate 23 and the right baffle plate 25 on both sides to move towards each other or away from each other, thereby adjusting the distance between the right nozzle 12 and the left nozzle 14.

[0042] In some examples, the bottom of the disc 31 is symmetrically connected to a first limiting shaft 32 and a second limiting shaft 33. The first limiting shaft 32 is rotatably connected to the first traction arm 34, and the second limiting shaft 33 is rotatably connected to the second traction arm 35. The top of the left baffle plate 23 and the right baffle plate 25 are respectively connected to a third limiting shaft 36 and a fourth limiting shaft 37. The third limiting shaft 36 and the fourth limiting shaft 37 are rotatably connected to the other end of the second traction arm 35 and the first traction arm 34, respectively. When the disc 31 rotates, it helps to drive the first traction arm 34 and the second traction arm 35 at the bottom to pull, thereby synchronously pulling the left baffle plate 23 and the right baffle plate 25 on both sides to move towards each other or away from each other, thereby adjusting the distance between the right nozzle 12 and the left nozzle 14, which is beneficial to control the oil coverage range according to the tire width.

[0043] In some examples, a circular slider 28 is connected to the top of the disk 31, and a circular guide rail 24 is slidably connected to the top of the circular slider 28. The top of the circular guide rail 24 is fixedly connected to the top surface of the inner wall of the inner shell 6. The cooperation between the circular slider 28 and the circular guide rail 24 helps to ensure that the disk 31 rotates flexibly.

[0044] In some examples, a pair of elongated sliders 39 are connected to the bottom of both the left baffle 23 and the right baffle 25. The bottom of the elongated sliders 39 is slidably connected to a slide rail 29, which is fixedly connected to the bottom surface of the inner wall of the inner shell 6. The cooperation between the elongated sliders 39 and the slide rails 29 helps to limit the left baffle 23 and the right baffle 25 on both sides, ensuring that the left baffle 23 and the right baffle 25 slide in parallel.

[0045] In some examples, the two side walls of the left baffle plate 23 and the right baffle plate 25 are connected to bearings 42. A third shaft 40 is rotatably connected inside a pair of bearings 42. One end of the third shaft 40 is fixedly connected to a collar 46. The inner walls of the pair of collars 46 are fixedly connected to the right nozzle 12 and the left nozzle 14, respectively.

[0046] In some examples, motors 45 are connected to the top of both the left baffle plate 23 and the right baffle plate 25. One end of the output shaft of the motor 45 is connected to a second synchronous pulley 44. A synchronous belt 43 is sleeved on the outside of the second synchronous pulley 44, and a first synchronous pulley 41 is connected to the inside of the synchronous belt 43. The inside of the first synchronous pulley 41 is fixedly connected to the third shaft 40. When the motor 45 is turned on, the third shaft 40 and the collar 46 at one end are easily driven to rotate under the cooperation of the first synchronous pulley 41, the synchronous belt 43 and the second synchronous pulley 44. This allows for the adjustment of the nozzle angles on both sides, which is beneficial for adapting to the spraying needs of different construction scenarios. For example, by increasing the nozzle elevation angle, it is beneficial to avoid oil leakage on the upper part of the tire due to gravity. On the other hand, when the asphalt viscosity is high, by adjusting the spray angle, the impact force of the oil on the tire tread is enhanced, ensuring uniform adhesion of the adhesive layer.

[0047] In some examples, the motor 45 is positioned to the left and right of the fourth limiting shaft 37.

[0048] In some examples, the oil supply mechanism includes an oil storage tank 1, with an oil pump 3 connected to the top of the oil storage tank 1. A second oil delivery hose 4 and a first oil delivery hose 2 are connected to the left and right sides of the oil pump 3, respectively. One end of the first oil delivery hose 2 extends into the interior of the oil storage tank 1, and one end of the second oil delivery hose 4 is connected to an oil distribution pipe 19. Three third oil delivery hoses 17 are connected horizontally to the bottom of the oil distribution pipe 19. One end of each of the three third oil delivery hoses 17 passes through the top of the inner shell 6 and is fixedly connected to the left nozzle 14, the middle nozzle 13, and the right nozzle 12, respectively. When the oil pump 3 is turned on, the oil in the oil storage tank 1 is conveniently fed into the interior of the left nozzle 14, the middle nozzle 13, and the right nozzle 12 through the second oil delivery hose 4, the first oil delivery hose 2, the oil distribution pipe 19, and the three third oil delivery hoses 17, and sprayed out.

[0049] In some examples, a shaft hole 16 is provided on one side of the inner shell 6, and a first shaft 18 is rotatably connected inside the shaft hole 16. The two ends of the first shaft 18 are fixedly connected to the inner wall of the fixing frame 5 respectively. Through the cooperation between the shaft hole 16 and the first shaft 18, the inner shell 6 can rotate flexibly. Then, by opening the first electric push rod 8, the inner shell 6 can be easily driven to flip, so that the inner shell 6 can adapt to the position of the tire.

[0050] This invention, by activating the second electric push rod 21, facilitates the left-right swinging of the irregularly shaped plate 22. With the cooperation of the toothed groove 26 and the arc-shaped rack 30, it further drives the disc 31 to rotate left and right. Then, through the rotational connection of the first traction arm 34 and the second traction arm 35 at the bottom of the disc 31, it facilitates the synchronous traction of the left and right baffle plates 23 and 25 on both sides to move towards or away from each other. This allows for adjustment of the distance between the right nozzle 12 and the left nozzle 14, which is beneficial for controlling the oil coverage area according to the tire width and avoids the problems caused by traditional fixed spacing. To address issues of edge spillage or center accumulation, the motor 45 is activated. Through the coordinated action of the first synchronous pulley 41, the synchronous belt 43, and the second synchronous pulley 44, the third shaft 40 and the collar 46 at one end are easily driven to rotate. This allows for adjustment of the nozzle angles on both sides, which is beneficial for adapting to the spraying needs of different construction scenarios. For example, by increasing the nozzle elevation angle, it is helpful to prevent oil from leaking onto the upper part of the tire due to gravity. On the other hand, when the asphalt viscosity is high, by adjusting the spray angle, the impact force of the oil on the tire tread is enhanced, ensuring uniform adhesion of the bonding layer.

[0051] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fuel spraying device for a tire roller, characterized in that, include: A fixed frame (5) is provided, with four mounting seats (9) connected to its back side. An inner shell (6) is rotatably connected to the inner side of the fixed frame (5). A first hinge seat (7) is connected to the top of the inner shell (6). A first electric push rod (8) is rotatably connected to the outer side of the first hinge seat (7). A second hinge seat (10) is rotatably connected to the bottom of the first electric push rod (8). The second hinge seat (10) is fixedly connected to the fixed frame (5). The inner shell (6) has a first through hole (15) at the middle of its bottom. A middle nozzle (13) is fixedly connected inside the first through hole (15). A pair of movable holes (11) are respectively opened on both sides of the middle nozzle (13) at the bottom of the inner shell (6). A right nozzle (12) and a left nozzle (14) are respectively slidably connected inside the pair of movable holes (11). An oil supply mechanism is provided on the top of the middle nozzle (13), the right nozzle (12) and the left nozzle (14). The left baffle plate (23) and the right baffle plate (25) are rotatably connected to the outer sides of the right nozzle (12) and the left nozzle (14), respectively, and a driving mechanism is provided on the top of the left baffle plate (23) and the right baffle plate (25).

2. The oil spraying device for a tire roller according to claim 1, characterized in that: The driving mechanism includes a back plate (20), the top of which is fixedly connected to the top surface of the inner wall of the inner shell (6). A second electric push rod (21) is connected to one side of the back plate (20). A fifth limiting shaft (38) is rotatably connected to the output end of the second electric push rod (21). A special-shaped plate (22) is fixedly connected to the top end of the fifth limiting shaft (38). A second shaft (27) is rotatably connected inside the special-shaped plate (22). The top of the second shaft (27) is connected to the inner shell (6). The inner wall top surface is fixedly connected, and the outer side of the irregular plate (22) is provided with a toothed groove (26). An arc-shaped rack (30) is meshed with the outer side of the toothed groove (26). A disc (31) is fixedly connected to the inner side of the arc-shaped rack (30). The bottom of the disc (31) is rotatably connected to a second traction arm (35) and a first traction arm (34). One end of the second traction arm (35) and the first traction arm (34) are rotatably connected to the left baffle plate (23) and the right baffle plate (25), respectively.

3. The oil spraying device for a tire roller according to claim 2, characterized in that: The bottom of the disc (31) is symmetrically connected with a first limiting shaft (32) and a second limiting shaft (33). The first limiting shaft (32) is rotatably connected to the first traction arm (34), and the second limiting shaft (33) is rotatably connected to the second traction arm (35). The top of the left baffle plate (23) and the right baffle plate (25) are respectively connected with a third limiting shaft (36) and a fourth limiting shaft (37). The third limiting shaft (36) and the fourth limiting shaft (37) are rotatably connected to the other end of the second traction arm (35) and the first traction arm (34), respectively.

4. The oil spraying device for a tire roller according to claim 2, characterized in that: The top of the disk (31) is connected to a circular slider (28), and the top of the circular slider (28) is slidably connected to a circular guide rail (24). The top of the circular guide rail (24) is fixedly connected to the top surface of the inner wall of the inner shell (6).

5. The oil spraying device for a tire roller according to claim 2, characterized in that: The bottom of the left baffle (23) and the right baffle (25) are each connected to a pair of long strip sliders (39). The bottom of the long strip sliders (39) is slidably connected to a slide rail (29), and the slide rail (29) is fixedly connected to the bottom surface of the inner wall of the inner shell (6).

6. The oil spraying device for a tire roller according to claim 1, characterized in that: The left baffle plate (23) and the right baffle plate (25) are both connected to bearings (42). A third shaft (40) is rotatably connected inside a pair of bearings (42). A collar (46) is fixedly connected to one end of the third shaft (40). The inner walls of a pair of collars (46) are fixedly connected to the right nozzle (12) and the left nozzle (14) respectively.

7. The oil spraying device for a tire roller according to claim 6, characterized in that: The top of the left baffle (23) and the right baffle (25) are both connected to a motor (45). One end of the output shaft of the motor (45) is connected to a second synchronous pulley (44). A synchronous belt (43) is sleeved on the outside of the second synchronous pulley (44). A first synchronous pulley (41) is connected to the inside of the synchronous belt (43). The inside of the first synchronous pulley (41) is fixedly connected to the third shaft (40).

8. The oil spraying device for a tire roller according to claim 7, characterized in that: The motor (45) and the fourth limiting shaft (37) are distributed to the left and right.

9. The oil spraying device for a tire roller according to claim 1, characterized in that: The oil supply mechanism includes an oil storage tank (1), an oil pump (3) is connected to the top of the oil storage tank (1), a second oil delivery hose (4) and a first oil delivery hose (2) are connected to the left and right sides of the oil pump (3) respectively, one end of the first oil delivery hose (2) extends into the interior of the oil storage tank (1), one end of the second oil delivery hose (4) is connected to an oil distribution pipe (19), and three third oil delivery hoses (17) are connected horizontally to the bottom of the oil distribution pipe (19). One end of the three third oil delivery hoses (17) penetrates the top of the inner shell (6) and is fixedly connected to the left nozzle (14), the middle nozzle (13) and the right nozzle (12) respectively.

10. The oil spraying device for a tire roller according to claim 1, characterized in that: The inner shell (6) has a shaft hole (16) on one side, and a first shaft (18) is rotatably connected inside the shaft hole (16). The two ends of the first shaft (18) are respectively fixedly connected to the inner wall of the fixing frame (5).

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