CN210664314U - Checking fixture - Google Patents

Abstract

The utility model discloses an examine utensil, including bottom plate, fixed connection in the bottom plate up end examine test table and be used for fixed material that awaits measuring a plurality of reverse-drawing anchor clamps, examine test table and set up along its length direction and put the thing groove with the material shape that awaits measuring agrees with mutually, put thing groove intercommunication and examine test table both ends and one side outer wall, put the fixed cushion that is equipped with and is used for supporting the material that awaits measuring on the thing groove, the cushion is equipped with a plurality ofly, sets up the position of agreeing with the bellying mutually respectively, the round hole position all is inserted and is equipped with the locating pin that is used for supplying the material location that awaits measuring, examine and set up on the. The flatness detection device is characterized in that the materials to be detected are positioned on the detection platform, and the distance between each edge position of the materials to be detected and the detection platform is measured, so that the purpose of detecting the flatness is achieved.

Description

Checking fixture

Technical Field

The utility model relates to an examine utensil, concretely relates to an instrument for detecting rear bumper fixed bolster roughness.

Background

As shown in fig. 4, the rear bumper fixing bracket is a more critical fixing part when the rear bumper is installed on the automobile, and includes a main plate portion 60 and a bending portion 63, the main plate portion 60 includes a plurality of protrusions 61 and a plurality of recesses 62, two circular holes 64 are formed on the surface of the protrusions 61, and two rectangular grooves 65 are formed on the surface of the recesses 62. Two corrugated plates 66 are also provided on the main plate portion 60 at intervals.

The rear bumper fixing bracket is usually formed by pressing a cold pressing die, and after the rear bumper fixing bracket is machined, a certain bending retraction amount exists, so that the rear bumper fixing bracket needs to be extracted to detect whether the rear bumper fixing bracket meets the production standard or not, and the die is improved. In the prior art, usually, the rear bumper fixing bracket is directly measured by a vernier caliper to judge whether the rear bumper fixing bracket meets the standard, but the surface of the rear bumper fixing bracket is uneven, so that the integral flatness of the rear bumper fixing bracket is difficult to measure.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide an examine utensil places on examining test table through the material location that will await measuring to measure each border position of the material that awaits measuring and examine test table's interval, reach the purpose that detects the roughness.

In order to achieve the above purpose, the utility model provides a following technical scheme: a checking fixture comprises a bottom plate, a checking platform fixedly connected to the upper end surface of the bottom plate and a plurality of reverse-pull fixtures used for fixing materials to be detected, wherein each reverse-pull fixture comprises a base, two first rod pieces rotatably connected to the base and parallel to each other, a second rod piece positioned between the two first rod pieces and rotatably connected to the first rod pieces, a third rod piece positioned on one side of the first rod piece far away from the second rod piece and rotatably connected to the base, and a handle fixedly connected to the third rod piece, the third rod pieces are parallelly provided with two cushion blocks which are both rotatably connected to the second rod piece and fixedly connected to the two third rod pieces, the checking platform is provided with an object placing groove matched with the shape of the materials to be detected along the length direction of the checking platform, the object placing groove is communicated with the two ends of the checking platform and the outer wall on one side, cushion blocks used for supporting the materials to be detected are fixedly arranged on the object placing groove, the cushion blocks, the round hole positions are all inserted with positioning pins for positioning the material to be measured, and the cushion block is provided with a first groove for embedding the positioning pins.

Through adopting above-mentioned technical scheme, when the material that awaits measuring is arranged in and is put the thing inslot, the material that awaits measuring is by cushion jack-up, aligns first groove with the round hole, then inserts first inslot behind the locating pin passing round hole, and the material that awaits measuring is spacing. At the moment, an upward force is applied to the handle, the third rod piece rotates to drive the second rod piece to rotate, and therefore the first rod piece is driven to rotate relative to the base until the material to be detected is fixed. And measuring the distance between the material to be detected and each position of the detection table, and if the difference value of each distance reaches a certain numerical value, the flatness of the material does not reach the standard. The detection method is simple to operate, high in accuracy and strong in practicability.

The utility model discloses a further set up to: the detection table is provided with second grooves corresponding to the rectangular grooves, embedded blocks are installed in the second grooves, the lower end portions of the embedded blocks are embedded in the second grooves, and the shapes of the lower ends of the embedded blocks are matched with the shapes of the rectangular grooves.

Through adopting above-mentioned technical scheme, will await measuring the material and place on putting the thing groove and with its position limited back, the abaculus passes the rectangular channel and imbeds in the second groove. The shapes of the lower ends of the rectangular grooves and the embedded blocks are matched, the embedded blocks are in clearance fit with the rectangular grooves, the distance between the peripheral sides of the lower ends of the embedded blocks and the rectangular grooves is observed, and whether the positions of the rectangular grooves are accurate or not is judged.

The utility model discloses a further set up to: the buckled plate has the backing plate that agrees with rather than the shape mutually, backing plate upper end butt in buckled plate, examine the fixed detection subassembly that is used for detecting the buckled plate radian that is equipped with in platform one side, detection subassembly includes the supporter and rotates the butt pole of connecting in the supporter, the butt pole includes that horizontal pole and fixed connection keep away from the montant of supporter one side in the horizontal pole, terminal surface and the buckled plate upper surface radian of standard agree with under the montant, terminal surface butt in the material upper surface that awaits measuring under the montant.

Through adopting above-mentioned technical scheme, under the general condition, it is difficult to judge whether the radian of the last buckled plate of material that awaits measuring accords with the standard. When the material to be detected is placed on the detection table, the lower end of the corrugated plate is basically attached to the upper end face of the base plate, and the base plate supports the material to be detected. The butt-joint rod is rotated until the lower end face of the vertical rod is in butt joint with the upper end face of the corrugated plate, and whether the radian of the corrugated plate meets the standard or not is judged by observing the gap between the lower end of the vertical rod and the corrugated plate from the side face.

The utility model discloses a further set up to: the supporting piece is rotatably connected with a limiting block for limiting the butting rod, when the limiting block rotates to a certain state, the lower end of the limiting block butts against the supporting block and the butting rod at the same time, and the lower end of the vertical rod butts against the material to be detected.

Through adopting above-mentioned technical scheme, if the buckled plate tip is because external force slight bending, does not carry out spacing the words to the butt pole, can influence the roughness of buckled plate and detect. When the butt pole rotates to montant lower extreme face butt buckled plate, rotate the stopper, order about the downward slight application of force of butt pole lower extreme for the buckled plate up end is more pressed close to butt pole lower surface, and the tight backing plate is also pasted to the buckled plate lower extreme simultaneously, makes the observation more accurate.

The utility model discloses a further set up to: the utility model discloses a material testing device, including reverse drawing anchor clamps, first member end connection, first dead lever, first member both ends of first dead lever, first member end connection has first dead lever, first member one end is kept away from to reverse drawing anchor clamps are two first anchor clamps of fixed round hole week side and set up the second anchor clamps in the middle of two first anchor clamps respectively, the first member end connection of first anchor clamps has first dead lever, the first member one end of first dead lever is the outside U-shaped of opening, the downside at the U-shaped open end both ends of first dead lever is fixedly connected with fixed block respectively, fixed block lower extreme butt just distributes in the both sides of round hole in the material upper surface that awaits measuring, the first member end.

Through adopting above-mentioned technical scheme, the bellying lower extreme is equipped with the cushion, when fixing the material that awaits measuring, needs even application of force, otherwise can lead to the material that awaits measuring to warp and influence the testing result. The fixing rod with the U-shaped end part uniformly applies force downwards to two sides of the supporting point of the material to be detected, so that the fixing purpose is achieved.

The utility model discloses a further set up to: the first fixing rod is connected to the first rod piece of the first clamp in a sliding mode, and the second fixing rod is connected to the first rod piece of the second clamp in a sliding mode.

Through adopting above-mentioned technical scheme, through the position of adjusting the relative first member of first dead lever and the relative first member of second dead lever, adjust the position of exerting pressure of the material that awaits measuring for when the material that awaits measuring is place and is put the thing inslot, fixed position does not influence the observation. In addition, the reverse-pulling clamp can adapt to materials of multiple sizes, and economic benefits are improved.

The utility model discloses a further set up to: the two sides of the bottom plate are respectively fixedly connected with a force application rod, the force application rod is U-shaped, the opening of the force application rod faces the bottom plate, and the two sides of the opening end of the force application rod are fixedly connected to the bottom plate.

Through adopting above-mentioned technical scheme, rear bumper fixed bolster's size is less, consequently is applicable to the size that detects utensil of detecting rear bumper fixed bolster also less, but directly carries it and has inconvenience many. The two sides of the bottom plate are provided with the force application rods which are convenient for force application, after the material is used, the material is detached, and the two hands respectively hold the force application rods at the two sides, so that the material can be carried.

The utility model discloses a further set up to: the anti-skidding rubber pads are fixedly arranged at the lower end of the bottom plate, and four rubber pads are uniformly distributed at the lower end of the bottom plate.

Through adopting above-mentioned technical scheme, during the detection, will examine usually to arrange in on the horizontal plane, when the horizontal plane is comparatively smooth, examine utensil and horizontal plane between frictional force less, when the installation material that awaits measuring and the measurement material that awaits measuring, examine the utensil and slide easily, lead to measuring comparatively inconvenient. The rubber pad is arranged at the position where the bottom plate is in contact with the horizontal plane, so that the friction between the checking fixture and the horizontal plane is increased, and the checking fixture is not easy to move.

The utility model has the advantages of it is following:

1. the flatness detection device is characterized in that the materials to be detected are positioned on the detection platform, and the distance between each edge position of the materials to be detected and the detection platform is measured, so that the purpose of detecting the flatness is achieved.

2. Whether the radian of buckled plate accords with the standard is judged through observing the clearance between montant lower extreme and the buckled plate from the side.

3. And judging whether the position of the rectangular groove is accurate or not by observing the distance between the peripheral side of the lower end of the embedded block and the rectangular groove.

Drawings

FIG. 1 is a first isometric view of the present embodiment;

FIG. 2 is a structural exploded view of the insert and parts of the present embodiment;

FIG. 3 is an enlarged view of FIG. 1 at A;

fig. 4 is a schematic structural view of a part.

Reference numerals: 10. a base plate; 11. a rubber pad; 12. a force application rod; 20. a detection table; 21. a storage groove; 22. cushion blocks; 23. a first groove; 24. positioning pins; 25. a second groove; 26. an insert block; 30. reversely pulling the clamp; 31. a first clamp; 32. a second clamp; 33. a base plate; 40. a detection component; 41. a support member; 42. a butting rod; 43. a cross bar; 44. a vertical rod; 45. a limiting block; 50. a first chute; 51. a first connecting rod; 52. fixing a nut; 53. a first fixing lever; 54. a fixed block; 55. a second chute; 56. a second fixing bar; 57. a connecting nut; 60. a main plate portion; 61. a boss portion; 62. a recessed portion; 63. a bending section; 64. a circular hole; 65. a rectangular groove; 66. a corrugated plate; 70. a base; 71. a first bar member; 72. a second bar member; 73. a third bar member; 74. a handle.

Detailed Description

A checking fixture is shown in fig. 1 and 2 and comprises a bottom plate 10 and a checking platform 20 fixedly arranged on the bottom plate 10, wherein a rubber pad 11 is fixedly connected to the lower end of the bottom plate 10, and four rubber pads 11 are uniformly distributed below four corners of the bottom plate 10. The two side walls of the bottom plate 10 are respectively and fixedly connected with a force application rod 12, and the force application rod 12 is in a U shape with an opening facing the bottom plate 10. The detection table 20 is provided with an article placing groove 21 along the length direction, the article placing groove 21 is communicated with the end faces of two ends and the outer wall of one side, and the shape of the inner wall of the article placing groove 21 is matched with that of the rear bumper fixing support. As shown in fig. 2 and 4, three cushion blocks 22 are fixed on the storage slot 21 and are all arranged below the protruding portion 61, two cushion blocks 22 are arranged right below the circular hole 64, and the other cushion block 22 is arranged between the other two cushion blocks 22. First grooves 23 are formed in the cushion blocks 22 on the two sides along the axis of the cushion blocks, positioning pins 24 for positioning materials to be measured are installed in the first grooves 23, the lower ends of the positioning pins 24 penetrate through the round holes 64 and then are embedded in the first grooves 23, and the positioning pins 24 are in clearance fit with the round holes 64.

As shown in fig. 1 and fig. 3, three reverse-pulling clamps 30 for fixing the position of the material to be measured are disposed on the bottom plate 10 near the object placing groove 21, and the reverse-pulling clamps 30 are two first clamps 31 for fixing the circumferential position of the circular hole 64 and a second clamp 32 disposed between the two first clamps 31. As shown in fig. 2 and 4, a backing plate 33 is provided under the corrugated plate 66 to match the shape thereof, the lower end of the backing plate 33 is fixed to the surface of the storage tank 21, and the upper end of the backing plate 33 abuts against the corrugated plate 66. The detection assembly 40 for detecting the radian of the corrugated plate 66 is fixedly arranged on one side of the detection table 20, which is far away from the counter-pulling clamp 30.

When detecting the roughness, will examine utensil and place in the horizontal plane on, guarantee its steady back, place the material that awaits measuring in putting the thing groove 21. The lower end of the material to be measured is abutted against the three cushion blocks 22, the round hole 64 on the material to be measured corresponds to the first groove 23, and when the corrugated plate 66 is attached to the arc of the cushion plate 33, the lower end of the positioning pin 24 is embedded into the first groove 23. After the position correspondence is completed, the position of the material to be measured is fixed by the reverse pulling clamp 30. The distance between the material to be measured and each position of the detection table 20 is measured, and if the difference value of each distance reaches a certain value, the flatness of the material does not reach the standard. And observing the size of the gap between the positioning pin 24 and the round hole 64, and judging whether the position of the round hole 64 reaches the standard or not. The sensing assembly 40 concludes and records whether the curvature of the corrugated plate 66 is accurate.

Specifically, as shown in fig. 2 and 4, a second groove 25 is formed in the storage groove 21 at a position corresponding to the rectangular groove 65, and the insert 26 is mounted in the second groove 25. The insert 26 comprises an upper section and a lower section, the lower section is embedded in the second groove 25, the lower end of the upper section is a cuboid matched with the rectangular groove 65, and the lower end of the upper section is in clearance fit with the material to be measured.

When detecting the position of rectangular channel 65, will await measuring the material and place in putting thing groove 21 and fixed, with in the inserted block 26 lower extreme embedding second groove 25, the lower extreme and the rectangular channel 65 inner wall of upper segment are clearance fit. The distance between the peripheral side of the insert 26 and the rectangular groove 65 is observed, if the insert 26 cannot be embedded into the second groove 25, that is, the lower end of the upper section interferes with the material to be measured, which indicates that the position error of the rectangular groove 65 is large.

Specifically, the first clamp 31 and the second clamp 32 each include a base 70, two first rods 71 rotatably connected to the base 70 and parallel to each other, a second rod 72 rotatably connected to the first rods 71 and located between the two first rods 71, a third rod 73 rotatably connected to the base 70 and located on a side of the first rod 71 away from the second rod 72, and a handle 74 fixedly connected to the third rod 73, two third rods 73 are arranged in parallel and rotatably connected to the second rod 72, and the handle 74 is fixedly connected to upper ends of the two third rods 73.

A first sliding groove 50 communicating the upper and lower end surfaces is vertically formed at one end of the first rod 71 of the first clamp 31 close to the detection table 20, and two first connecting rods 51 penetrate through the first sliding groove 50. The lower ends of the first connecting rods 51 are fixedly connected with first fixing rods 53, and the lower ends of the two first connecting rods 51 are fixed on one first fixing rod 53. The upper and lower ends of the first connecting rod 51 are all connected with the fixing nuts 52 by screw threads, the lower end surface of the fixing nut 52 at the upper end abuts against the first rod member 71, and the upper end surface of the fixing nut 52 at the lower end abuts against the first fixing rod 53. One end of the first fixing rod 53, which is far away from the first clamp 31, is in a U shape with an outward opening, the lower sides of the two ends of the U-shaped opening end of the first fixing rod 53 are fixedly connected with fixing blocks 54 respectively, and the lower ends of the fixing blocks 54 are abutted to the upper surface of the material to be tested and distributed on the two sides of the round hole 64. A second chute 55 communicating the upper and lower end surfaces is vertically formed at one end of the first rod 71 of the second clamp 32 close to the detection platform 20, and a second fixing rod 56 penetrates through the second chute 55 along the vertical direction. The upper and lower ends of the second fixing rod 56 are both screwed with the connecting nuts 57, and the upper and lower end surfaces of the connecting nuts 57 at the upper end are both abutted against the first rod 71 of the second clamp 32. The lower end of the second fixing rod 56 abuts against the upper surface of the material to be measured.

When the material to be tested is fixed, an upward force is applied to the handle 74, the third rod 73 rotates to drive the second rod 72 to rotate, so as to drive the first rod 71 to rotate relative to the base 70, the lower ends of the fixing block 54 and the second fixing rod 56 are abutted against the upper surface of the material to be tested, and the position of the material to be tested is fixed. When the size of the object to be measured changes, the fixing nut 52 is unscrewed, the first connecting rod 51 slides in the first sliding groove 50 until the object slides to a proper position and stops, and the fixing nuts 52 at the upper end and the lower end are screwed down. The connecting nut 57 is unscrewed, the second fixing rod 56 slides in the second sliding slot 55 until the second fixing rod stops sliding to a proper position, and the connecting nuts 57 at the upper end and the lower end are screwed.

Specifically, the detecting assembly 40 includes a support 41 fixedly connected to the base plate 10 and an abutment lever 42 rotatably connected to the support 41. The abutment bar 42 comprises a cross bar 43 and a vertical bar 44 fixedly connected to the cross bar 43 on a side remote from the support 41. The lower end of the vertical rod 44 is matched with the radian of the upper surface of the standard corrugated plate 66, and the lower end of the vertical rod 44 is abutted against the upper surface of the material to be detected. The upper end face of the supporting member 41 is rotatably connected with a limiting block 45 for limiting the abutting rod 42, the rotating point of the limiting block 45 is arranged on one side of the supporting member 41 close to the center of gravity of the supporting member, and the rotating point is eccentrically arranged.

When detecting 66 radians of buckled plate, rotate and connect pole 42, until montant 44 lower extreme butt in the buckled plate 66 upper surface, rotate stopper 45 for tip butt in the pole 42 is connected to the butt under the stopper 45, and at this moment, montant 44 lower extreme supports tight buckled plate 66 upper surface. And observing the gap between the lower end of the vertical rod 44 and the corrugated plate 66 to judge whether the radian of the corrugated plate 66 meets the standard or not.

The working principle of the embodiment is as follows: when detecting the roughness, will examine utensil and place in the horizontal plane on, guarantee its steady back, place the material that awaits measuring in putting the thing groove 21. The lower end of the material to be measured is abutted against the three cushion blocks 22, the round hole 64 on the material to be measured corresponds to the first groove 23, and when the corrugated plate 66 is attached to the arc of the cushion plate 33, the lower end of the positioning pin 24 is embedded into the first groove 23. After the position correspondence is completed, the position of the material to be measured is fixed by the reverse pulling clamp 30. The distance between the material to be measured and each position of the detection table 20 is measured, and if the difference value of each distance reaches a certain value, the flatness of the material does not reach the standard. And observing the size of the gap between the positioning pin 24 and the round hole 64, and judging whether the position of the round hole 64 reaches the standard or not.

When detecting the position of rectangular channel 65, the material to be measured is placed in and is put thing groove 21 internal fixation back, and the lower extreme of abaculus 26 imbeds in the second groove 25, with rectangular channel 65 inner wall clearance fit. If the insert 26 cannot be inserted into the second groove 25, that is, the lower end of the upper section interferes with the material to be measured, it indicates that the position error of the rectangular groove 65 is large.

When the size of the object to be measured changes, the fixing nuts 52 are unscrewed, the first connecting rod 51 slides in the first sliding groove 50 until the object slides to a proper position and stops, and the fixing nuts 52 are screwed one by one. The connecting nuts 57 are unscrewed, the second fixing rods 56 slide in the second sliding grooves 55 until the second fixing rods slide to a proper position, and the connecting nuts 57 are screwed one by one.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A checking fixture is characterized in that: comprises a bottom plate (10), a detection platform (20) fixedly connected to the upper end surface of the bottom plate (10) and a plurality of reverse-pull clamps (30) used for fixing a material to be detected, wherein each reverse-pull clamp (30) comprises a base (70), two first rod pieces (71) rotatably connected to the base (70) and parallel to each other, a second rod piece (72) positioned between the two first rod pieces (71) and rotatably connected to the first rod pieces (71), a third rod piece (73) positioned on one side of the first rod pieces (71) far away from the second rod pieces (72) and rotatably connected to the base (70), and a handle (74) fixedly connected to the third rod piece (73), two parallel third rod pieces (73) are rotatably connected to the second rod pieces (72), the handle (74) is fixedly connected to the two third rod pieces (73), an object placing groove (21) matched with the shape of the material to be detected is formed in the detection platform (20) along the length direction thereof, put thing groove (21) intercommunication and examine test table (20) both ends and one side outer wall, it is equipped with cushion (22) that are used for supporting the material that awaits measuring to put thing groove (21) on the fixed, cushion (22) are equipped with a plurality ofly, and a plurality of cushion (22) set up respectively in the position that agrees with mutually with bellying (61), examine utensil still including being used for fixing a position locating pin (24) that awaits measuring material place round hole (64), set up first groove (23) that supply locating pin (24) to inlay to establish on cushion (22).

2. A test tool according to claim 1 wherein: the detection table (20) is provided with second grooves (25) at positions corresponding to the rectangular grooves (65), the second grooves (25) are internally provided with embedded blocks (26), the lower end parts of the embedded blocks (26) are embedded in the second grooves (25), and the shapes of the lower ends of the embedded blocks (26) are matched with the shapes of the rectangular grooves (65).

3. A test tool according to claim 1 wherein: examine utensil still including backing plate (33) that is used for fixing a position buckled plate (66), backing plate (33) upper end butt in buckled plate (66), examine fixed being equipped with in platform (20) one side and be used for detecting detection module (40) of buckled plate (66) radian, detection module (40) include support (41) and rotate connect in the butt pole (42) of support (41), butt pole (42) include horizontal pole (43) and fixed connection in horizontal pole (43) keep away from montant (44) of support (41) one side, the terminal surface agrees with the buckled plate (66) upper surface radian of standard under montant (44), terminal surface butt in the material upper surface that awaits measuring under montant (44).

4. A test tool according to claim 3 wherein: the supporting piece (41) is rotatably connected with a limiting block (45) used for limiting the butt-joint rod (42), when the limiting block (45) rotates to a certain state, the lower end of the limiting block (45) abuts against the supporting block and the butt-joint rod (42) at the same time, and the lower end of the vertical rod (44) abuts against the material to be detected.

5. A test tool according to claim 1 wherein: reverse draw anchor clamps (30) be first anchor clamps (31) of two fixed round hole (64) week sides respectively and set up second anchor clamps (32) in the middle of two first anchor clamps (31), first member (71) end connection of first anchor clamps (31) has first dead lever (53), first member (71) one end is kept away from in first dead lever (53) and is the outside U-shaped of opening, the downside at the U-shaped open end both ends of first dead lever (53) is fixedly connected with fixed block (54) respectively, fixed block (54) lower extreme butt just distributes in the both sides of round hole (64) in the material upper surface that awaits measuring, first member (71) end connection of second anchor clamps (32) has second dead lever (56), second dead lever (56) lower extreme butt in the upper surface of the material that awaits measuring.

6. A test tool according to claim 5 wherein: the first fixing rod (53) is connected with a first rod piece (71) of the first clamp (31) in a sliding mode, and the second fixing rod (56) is connected with the first rod piece (71) of the second clamp (32) in a sliding mode.

7. A test tool according to claim 1 wherein: the base plate is characterized in that force application rods (12) are fixedly connected to two sides of the base plate (10) respectively, the force application rods (12) are U-shaped, openings of the U-shaped force application rods are towards the base plate (10), and two sides of the opening ends of the force application rods (12) are fixedly connected to the base plate (10).

8. A test tool according to claim 1 wherein: the anti-skid rubber pad (11) is fixedly arranged at the lower end of the bottom plate (10), and four rubber pads (11) are uniformly distributed at the lower end of the bottom plate (10).

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