Distortion measurement device

Abstract

To provide a distortion measurement device capable of improving accuracy of distortion measurement for a vehicle body.SOLUTION: A distortion measurement device can measure a vehicle body with high accuracy since a reference for measuring a normal side of the vehicle body is the same as a reference for measuring a distorted side of the vehicle body damaged in an accident or the like, namely, a reference for measuring a normal side of the vehicle body front and rear surfaces is the same as a reference for measuring a distorted side of the vehicle body front and rear surfaces (a centerline of a front rear surfaces measurement reference pipe 11), and a reference for measuring a normal side of the vehicle body side surface is the same as a reference for measuring a distorted side of the vehicle body side surface (a centerline of a side surface measurement reference pipe 51).SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an apparatus for measuring distortion of an automobile body. [Background technology]

[0002] Patent Document 1 discloses a two-point resistance gauge (hereinafter referred to as a "conventional distortion measuring device") in which the distance between the two points is adjusted to match the distance between a reference point on the normal side and a measurement point on the normal side, and then the spherical tip portion of a spherical shaft is set on the magnet of an adsorption tool set at the reference point on the distorted side, and distortion of the vehicle body is measured based on the degree to which the conical tip portion of the pointed shaft is away from the measurement point on the distorted side. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6021137 Summary of the Invention [Problem to be solved by the invention]

[0004] With conventional distortion measuring devices, the reference used when measuring the normal side of the vehicle body is different from the reference used when measuring the distorted side of a vehicle body damaged in an accident or the like. Therefore, when the reference points on the normal side and the reference points on the distorted side are not symmetrical on the left and right sides of the vehicle body, it is not possible to accurately measure the distortion of the vehicle body.

[0005] An object of the present invention is to provide a strain measuring device capable of improving the accuracy of measuring strain on a vehicle body. [Means for solving the problem]

[0006] The distortion measuring device of the present invention is a device for measuring distortion of an automobile body, and includes a front / rear surface measurement reference pipe having a centerline arranged on a vertical plane including the vehicle centerline of a vehicle to be measured, a reference pipe support part for fixing the front / rear surface measurement reference pipe onto a roof panel of the vehicle body so that the centerline is parallel to the vehicle centerline, a pair of roof gauges attached to the front / rear surface measurement reference pipe so as to extend in the left / right direction from the front / rear surface measurement reference pipe and arranged perpendicular to the front / rear surface measurement reference pipe and parallel to each other, a vertical reference gauge fixed to the front / rear surface measurement reference pipe, arranged perpendicular to the center line of the front / rear surface measurement reference pipe and extending downward, and a reference pipe support part hanging down from the front / rear surface measurement reference pipe and arranged perpendicular to the center line of the front / rear surface measurement reference pipe. the front and rear end of the front and rear surface measurement reference pipe; a restraining means for releasably restraining the movement of the slide shaft portion relative to the front and rear surface measurement reference pipe; a vertical arm fixed to the slide shaft portion, arranged perpendicular to the center line of the front and rear surface measurement reference pipe and extending downward; a rod-shaped contactor held by the lower end of the vertical arm and arranged perpendicular to the vertical arm; a pair of contactor plumb lines hanging down from the slide shaft portion and arranged to sandwich the contactor; and a protractor fixed to the slide shaft portion and arranged so that its center point is perpendicular to the center line of the front and rear surface measurement reference pipe. Effect of the Invention

[0007] According to the present invention, the accuracy of measuring the distortion of a vehicle body can be improved. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is an explanatory diagram of the present embodiment, and is a side view conceptually showing a state when measuring front and rear surface distortions of a vehicle body. [Diagram 2] FIG. 2 is an explanatory diagram of the present embodiment, and is a plan view conceptually showing a state when measuring front and rear surface distortions of a vehicle body. [Diagram 3]FIG. 2 is an explanatory diagram of the present embodiment, and is a front view conceptually showing a state when measuring front and rear surface distortion of a vehicle body. [Figure 4] FIG. 13 is an explanatory diagram of a method for measuring distortion of the front of a vehicle to be measured, and is a side view showing the state in which the contactor is in contact with the reference point on the normal side. [Diagram 5] FIG. 13 is an explanatory diagram of a method for measuring distortion of the front of a vehicle to be measured, and is a front view showing the state in which the contactor is in contact with the reference point on the normal side. [Figure 6] FIG. 13 is an explanatory diagram of a method for measuring distortion on the front of a vehicle to be measured, and is a side view showing the state in which the contactor is brought into contact with a reference point on the distortion side. [Figure 7] FIG. 13 is an explanatory diagram of a method for measuring distortion on the front side of a vehicle to be measured, and is a front view showing the state in which the contactor is in contact with the reference point on the distortion side. [Figure 8] FIG. 2 is an explanatory diagram of the present embodiment, and is a side view conceptually showing a state when measuring side strain of a vehicle body. [Figure 9] FIG. 2 is an explanatory diagram of the present embodiment, and is a plan view conceptually showing a state when measuring side strain of a vehicle body. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment of the present invention will now be described with reference to the accompanying drawings. Note that descriptions of "directions" in the specification are based on the vehicle 1 being measured, and the rightward and leftward directions in Figures 1 and 2 are referred to as the "forward direction" and "rearward direction", the downward and upward directions in Figure 2 are referred to as the "rightward direction" and "leftward direction", and the upward and downward directions in Figure 1 are simply referred to as the "upward direction" and "downward direction".

[0010] As shown in FIG. 1 or 2, the distortion measuring device 10 has a front-rear surface measurement reference pipe 11 extending in the front-rear direction on the roof panel 2 of the vehicle 1 to be measured. The front-rear surface measurement reference pipe 11 is a circular pipe made of an aluminum alloy. The distortion measuring device 10 has a reference pipe support part 21 that supports the front-rear surface measurement reference pipe 11 parallel to the center line of the roof panel 2. The reference pipe support part 21 has a pair of sleeves 22, 22 through which the front-rear surface measurement reference pipe 11 is inserted, legs 23, 23 extending from each sleeve 22, 22 to both the left and right sides, and suction parts 24 (suction pads) attached to the tip of each leg 23, 23. The center line of the roof panel 2 is located in the center of the roof panel 2 in the left-right direction, and is a straight line that is arranged parallel to the vehicle center line (a straight line on the ground surface located in the center of the vehicle in the left-right direction).

[0011] The strain measuring device 10 has a pair of roof gauges 26, 26 for arranging the front and rear surface measurement reference pipe 11 in the center of the roof panel 2 in the left-right direction, in other words, for arranging the front and rear surface measurement reference pipe 11 on a vertical plane including the center line of the roof panel 2. The roof gauges 26, 26 are attached to the sleeves 22, 22 so as to extend from the front and rear surface measurement reference pipe 11 to both the left and right sides. In other words, the roof gauges 26, 26 are attached to the front and rear surface measurement reference pipe 11 via the sleeves 22, 22. The roof gauges 26, 26 are arranged perpendicular to the center line of the roof panel 2 and the front and rear surface measurement reference pipe 11. The roof gauges 26, 26 are arranged on the same horizontal plane and parallel to each other.

[0012] The strain measuring device 10 has a rod-shaped vertical reference gauge 12 whose upper end is fixed to the front and rear surface measurement reference pipe 11. The vertical reference gauge 12 extends downward ("downward" in FIG. 1) from the front and rear surface measurement reference pipe 11 and is disposed perpendicular to the front and rear surface measurement reference pipe 11. The vertical reference gauge 12 is disposed closer to the front end of the front and rear surface measurement reference pipe 11 ("right side" in FIG. 1) than the reference pipe support part 21. The strain measuring device 10 has a gauge plumb line 13 that hangs down from the front and rear surface measurement reference pipe 11. A plumb weight 14 is attached to the tip of the gauge plumb line 13. The gauge plumb line 13 extends parallel to the vertical reference gauge 12.

[0013] The distortion measuring device 10 has a slide shaft portion 31 that protrudes telescopically from the front end portion 15 of the front / rear surface measurement reference pipe 11 when measuring the front side of the vehicle 1 to be measured, and that protrudes telescopically from the rear end portion 16 of the front / rear surface measurement reference pipe 11 when measuring the rear side of the vehicle 1 to be measured. Here, the form when measuring the front side of the vehicle 1 to be measured (see Figs. 1 and 2) will be described.

[0014] The slide shaft portion 31 has a slide pipe 32 whose sliding portion (the "left side portion" in Figs. 1 and 2) is slidably inserted into the front end portion 15 of the front-rear surface measurement reference pipe 11, and an arm holding pipe 34 into whose rear end portion a protruding portion (the "right side portion" in Figs. 1 and 2) of the slide pipe 32 is inserted and fixed (joined) and into whose front end portion a shaft 33 is inserted. The slide shaft portion 31, i.e., the slide pipe 32, the shaft 33, and the arm holding pipe 34 are arranged coaxially with the front-rear surface measurement reference pipe 11.

[0015] The strain measuring device 10 has a vertical arm 41 attached to the arm holding pipe 34. The vertical arm 41 is disposed perpendicular to the slide shaft portion 31. The upper end side of the vertical arm 41 is inserted into a holding hole 35 penetrating the arm holding pipe 34, and is fixed at any position in the vertical direction. A contactor holding portion 42 is attached to the lower end of the vertical arm 41. The contactor holding portion 42 holds a rod-shaped contactor 43, both ends of which are formed into a pointed shape, perpendicular to the vertical arm 41. In this embodiment, a stainless steel flexible tube capable of retaining its shape is used as the vertical arm 41.

[0016] The strain measuring device 10 has a plumb line 44 (plumb line for contactor) hanging down from the front end of the slide pipe 32 (near the arm holding pipe 34), and a plumb line 46 (plumb line for contactor) hanging down from the front end position of the shaft 33. Plumb weights 45, 47 are attached to the tips of the plumb line 44, 46. The contactor 43 is disposed so as to extend between the plumb line 44 and the plumb line 46.

[0017] The strain measuring device 10 has a protractor 37 fixed to the front end of the shaft 33. The protractor 37 is arranged to face a plumb line 46 hanging down from the shaft 33. The protractor 37 is arranged perpendicular to the center line of the slide shaft portion 31 and therefore to the center line of the front and rear surface measurement reference pipe 11, and is arranged so that the center line of the slide shaft portion 31 passes through the center point of the protractor 37. As shown in FIG. 3, when the vertical arm 41 is oriented vertically, that is, when the vertical arm 41 and the plumb lines 44 and 46 are arranged in parallel, the angle of the plumb line 46 measured by the protractor 37 is 0 degrees, which is 90 degrees on the scale formed on a typical protractor.

[0018] The distortion measuring device 10 has a side measurement reference pipe 51 extending in the left-right direction on the roof panel 2 of the vehicle 1 to be measured. The side measurement reference pipe 51 is fixed to the front and rear measurement reference pipe 11. The side measurement reference pipe 51 is a circular tube made of the same aluminum alloy as the front and rear measurement reference pipe 11. The side measurement reference pipe 51 is arranged perpendicular to the center line of the roof panel 2 and the front and rear measurement reference pipe 11. The side measurement reference pipe 51 is arranged between the pair of roof gauges 26, 26 and arranged parallel to the roof gauges 26, 26. When measuring distortion of the side of the vehicle 1 to be measured, the slide pipe 32 of the slide shaft part 31 is slidably inserted into the left end part 52 or the right end part 53 of the side measurement reference pipe 51.

[0019] Next, a method for measuring the distortion of the measurement target vehicle 1 using the distortion measuring device 10 will be described. First, the distortion measuring device 10 is set on the roof panel 2 of the vehicle 1 to be measured. First, the reference pipe support part 21 with the front and rear surface measurement reference pipe 11 inserted into the sleeves 22, 22 is placed on the roof panel 2. Then, the center line of the front and rear surface measurement reference pipe 11 is aligned with the center of the roof panel 2 in the left-right direction.

[0020] Here, by aligning the center line of the front-rear surface measurement reference pipe 11 with the center in the left-right direction of the roof panel 2 based on the distance from the center line of the sleeves 22, 22 measured by the roof gauges 26, 26 to the left and right end positions of the roof panel 2, the front-rear surface measurement reference pipe 11 is arranged so that its center line is parallel to the center line of the roof panel 2 and is arranged on a vertical plane that includes the center line of the roof panel 2. The front-rear distance between the roof gauges 26, 26 is adjusted to, for example, 800 mm.

[0021] Next, the orientation of the vertical reference gauge 12 fixed to the front and rear measurement reference pipe 11 is adjusted so as to be parallel to the plumb line 13 (plumb line for gauge) by adjusting the air pressure of each tire of the measurement target vehicle 1. This brings the measurement target vehicle 1 into a horizontal state, and keeps the center lines of the front and rear measurement reference pipe 11, side measurement reference pipe 51, and roof panel 2 horizontal.

[0022] Next, in order to measure distortion of the left front surface 3 (the right surface in FIG. 3, hereinafter referred to as the "distorted front surface 3L") of the vehicle 1 to be measured, the slide pipe 32 (sliding portion) of the slide shaft portion 31 is inserted into the front end portion 15 of the front / rear surface measurement reference pipe 11. The slide shaft portion 31 inserted into the front / rear surface measurement reference pipe 11 has the slide pipe 32, shaft 33, and arm holding pipe 34 arranged coaxially with respect to the front / rear surface measurement reference pipe 11. In addition, the vertical arm 41 held by the arm holding pipe 34 is arranged parallel to the vertical reference gauge 12 fixed to the front / rear surface measurement reference pipe 11, i.e., is oriented vertically.

[0023] Next, the horizontal orientation of the contactor 43 held by the lower end (contactor holding portion 42) of the vertical arm 41 is adjusted so that the center line of the contactor 43 perpendicularly intersects with the plumb lines 44, 46 (contactor plumb lines). As a result, the center line of the contactor 43 is positioned on a plane (vertical plane) including the center line of the front and rear surface measurement reference pipe 11, the center line of the slide shaft portion 31, the center line of the roof panel 2, and the center line of the vertical arm 41.

[0024] 4 or 5, the slide shaft portion 31 is rotated (clockwise in FIG. 5) toward the right front surface 3 (the left surface in FIG. 3, hereinafter referred to as the "normal front surface 3R") relative to the front / rear surface measurement reference pipe 11, and moved in the axial direction (left / right direction in FIG. 4) to bring the tip 48 of the contactor 43 into contact with the reference point P0 (hereinafter referred to as the "normal side reference point P0") of the normal front surface 3R of the measurement target vehicle 1. Here, the angle A0 (see FIG. 5) of the plumb line 46 projected onto the protractor 37, i.e., the angle A0 between the vertical arm 41 and the plumb line 46 (hereinafter referred to as the "normal side reference angle A0"), is recorded.

[0025] 6 or 7, the slide shaft part 31 is rotated in the direction of the front surface 3L on the distortion side (counterclockwise direction in FIG. 7) relative to the front and rear surface measurement reference pipe 11. Here, the rotation angle of the slide shaft part 31 is adjusted so that the angle A1 of the plumb line 46 projected on the protractor 37, i.e., the angle A1 between the vertical arm 41 and the plumb line 46 (hereinafter referred to as the "distortion side reference angle A1"), becomes equal to the recorded normal side reference angle A0 (the absolute value becomes equal).

[0026] In other words, the rotation angle of the slide shaft portion 31 is adjusted so that the vertical arm 41 (see FIG. 5) when the angle between the vertical arm 41 and the plumb line 46 is the normal side reference angle A0 and the vertical arm 41 (see FIG. 7) when the angle between the vertical arm 41 and the plumb line 46 is the distortion side reference angle A1 are linearly symmetrical with respect to the plumb line 46 as an axis of symmetry when viewed from the front (see FIGS. 3, 5, and 7). As a result, the tip 48 of the contactor 43 is positioned at the reference point P1 on the distortion side front surface 3L of the vehicle 1 to be measured (hereinafter referred to as the "distortion side reference point P1").

[0027] Then, the slide shaft portion 31 is restrained by a restraining means (not shown) to prohibit the slide shaft portion 31 from moving in the rotational and axial directions relative to the front and rear surface measurement reference pipe 11, thereby fixing the position of the tip 48 of the contactor 43 at the distortion side reference point P1. Here, since the vehicle 1 to be measured is symmetrical, that is, the normal side front surface 3R and the distortion side front surface 3L are symmetrical, the distortion side reference point P1 is the position of the distortion side reference point before it is damaged (dented) due to an accident or the like. Therefore, the vehicle body can be returned to its pre-damage state by replacing parts or repairing the vehicle body so that the vehicle body comes into contact with the tip 48 of the contactor 43 located at the distortion side reference point P1.

[0028] Next, a method for measuring the distortion of the left side surface 4 (the right side surface in FIG. 3, hereinafter referred to as "the distortion side surface 4L") of the measurement target vehicle 1 will be described with reference to Figures 8 and 9. Note that descriptions overlapping with the procedure for measuring the distortion of the front surface 3 of the measurement target vehicle 1 described above will be omitted.

[0029] First, the slide pipe 32 (sliding part) of the slide shaft part 31 is inserted into the right end part 52 of the side measurement reference pipe 51 arranged horizontally on the roof panel 2. The slide shaft part 31 inserted into the side measurement reference pipe 51 is arranged so that the slide pipe 32, shaft 33, and arm holding pipe 34 are perpendicular to the center line of the roof panel 2. Next, the horizontal direction of the contactor 43 held at the lower end part (contactor holding part 42) of the vertical arm 41 is adjusted so that the center line of the contactor 43 perpendicularly intersects with the plumb line 44, 46 (contactor plumb line). As a result, the center line of the contactor 43 is arranged on a plane (vertical plane) including the center line of the side measurement reference pipe 51, the center line of the slide shaft part 31, and the center line of the vertical arm 41.

[0030] Next, the slide shaft portion 31 is moved relative to the side surface measurement reference pipe 51, and the tip 48 of the contactor 43 is brought into contact with the normal side reference point P0 on the normal side surface 4R of the target vehicle 1. Here, the angle A0 of the plumb line 46 projected onto the protractor 37, i.e., the normal side reference angle A0 formed by the vertical arm 41 and the plumb line 46, and the axial relative position of the slide shaft portion 31 with respect to the side surface measurement reference pipe 51 (hereinafter referred to as the "normal side axial relative position"), in other words, the protruding length of the slide shaft portion 31 from the right end portion 52 of the side surface measurement reference pipe 51, are recorded.

[0031] Next, after removing the slide shaft portion 31 from the right end portion 52 of the side measurement reference pipe 51, the slide shaft portion 31 is inserted into the left end portion 53 of the side measurement reference pipe 51. Next, the horizontal orientation of the contactor 43 held at the lower end portion (contactor holding portion 42) of the vertical arm 41 is adjusted so that the center line of the contactor 43 perpendicularly intersects with the plumb line 44, 46 (contactor plumb line).

[0032] Next, the slide shaft 31 is rotated and moved axially with respect to the side measurement reference pipe 51 so that the angle A1 of the plumb line 46 projected on the protractor 37, i.e., the angle A1 (distortion-side reference angle A1) between the vertical arm 41 and the plumb line 46, becomes equal to the recorded normal-side reference angle A0, and so that the axial relative position of the slide shaft 31 with respect to the side measurement reference pipe 51 (hereinafter referred to as the "distortion-side axial relative position"), in other words, the protruding length of the slide shaft 31 from the left end 53 of the side measurement reference pipe 51, becomes equal to the recorded normal-side axial relative position. As a result, the tip 48 of the contact 43 is positioned at the distortion-side reference point P1 of the distortion-side side 4L of the vehicle 1 to be measured.

[0033] Then, the slide shaft portion 31 is restrained by a restraining means (not shown) to prohibit the slide shaft portion 31 from moving in the rotational and axial directions relative to the front and rear surface measurement reference pipe 11, thereby fixing the position of the tip 48 of the contactor 43 at the distortion side reference point P1. Here, the vehicle 1 to be measured is symmetrical, that is, the normal side surface 4R and the distortion side surface 4L are symmetrical, so the distortion side reference point P1 is the position of the vehicle body before it is damaged (dented) due to an accident or the like. Therefore, the vehicle body can be returned to its pre-damage state by replacing parts or repairing the vehicle body so that the vehicle body comes into contact with the tip 48 of the contactor 43 located at the distortion side reference point P1.

[0034] Here, with conventional distortion measuring devices, the reference when measuring the normal side of the body of the vehicle being measured is different from the reference when measuring the distorted side of the body of a vehicle damaged in an accident, etc., so when the reference point on the normal side and the reference point on the distorted side are not symmetrical on the left and right sides of the vehicle body, it is not possible to accurately measure the distortion of the vehicle body.

[0035] In contrast, in this embodiment, the reference when measuring the normal side of the vehicle body is the same as the reference when measuring the distorted side of the vehicle body that has been damaged in an accident, etc., that is, the reference when measuring the normal sides of the front and rear surfaces of the vehicle body is the same as the reference when measuring the distorted sides of the front and rear surfaces of the vehicle body (the center line of the front and rear surface measurement reference pipe 11), and the reference when measuring the normal side of the side of the vehicle body is the same as the reference when measuring the distorted side of the side of the vehicle body (the center line of the side measurement reference pipe 51), so that the vehicle body can be measured with high accuracy.

[0036] The embodiment is not limited to the above-described form, and can be configured as follows, for example. In the above-described embodiment, when measuring the side of the vehicle body, the slide shaft portion 31 is inserted into the side measurement reference pipe 51, but it may also be configured so that the front / rear surface measurement reference pipe 11 into which the slide shaft portion 31 is inserted is rotated 90 degrees while being kept horizontal on the roof panel 2. [Explanation of symbols]

[0037] 1 Vehicle to be measured, 2 Roof panel, 10 Distortion measuring device, 11 Front and rear measurement reference pipes, 12 Vertical reference gauge, 13 Plumb line (plumb line for gauge), 15 Front end, 16 Rear end, 21 Reference pipe support part, 22 Sleeve, 26 Roof gauge, 31 Slide shaft part, 32 Slide pipe, 33 Shaft, 34 Arm holding pipe, 37 Protractor, 41 Vertical arm, 43 Contact, 44 Plumb line (plumb line for contact), 46 Plumb line (plumb line for contact)

Claims

1. An apparatus for measuring distortion of an automobile body, comprising: a front and rear measurement reference pipe having a center line arranged on a vertical plane including a vehicle center line of the measurement target vehicle; a reference pipe support portion for fixing the front and rear measurement reference pipe on a roof panel of a vehicle body so that a center line of the reference pipe is parallel to a center line of the vehicle; A pair of roof gauges are attached to the front and rear surface measurement reference pipe so as to extend in the left and right direction from the front and rear surface measurement reference pipe, and are arranged perpendicular to the front and rear surface measurement reference pipe and parallel to each other; a vertical reference gauge fixed to the front and rear measurement reference pipe, disposed perpendicular to a center line of the front and rear measurement reference pipe, and extending downward; a plumb line for a gauge that is suspended from the front and rear surface measurement reference pipe and extends parallel to the vertical reference gauge; A slide shaft portion movably inserted into the front end portion or the rear end portion of the front / rear surface measurement reference pipe; a restraining means for releasably restraining movement of the slide shaft portion relative to the front-rear surface measurement reference pipe; A vertical arm is fixed to the slide shaft portion, is disposed perpendicular to a center line of the front and rear surface measurement reference pipe, and extends downward; a rod-shaped contact held by a lower end of the vertical arm and disposed perpendicular to the vertical arm; A pair of contact plumb lines that are suspended from the slide shaft portion and arranged to sandwich the contacts; A protractor fixed to the slide shaft portion and arranged so that a center point of the protractor is perpendicular to a center line of the front and rear surface measurement reference pipe; A strain measuring device comprising:

2. The strain measuring device according to claim 1, a side measurement reference pipe fixed to the front and rear surface measurement reference pipe so as to extend in the left and right direction from the front and rear surface measurement reference pipe; The side measurement reference pipe is disposed perpendicular to the front and rear measurement reference pipes and parallel to the pair of roof gauges; A strain measuring device, characterized in that the slide shaft portion is slidably inserted into the left end portion or the right end portion of the side measurement reference pipe.

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