JP2017020958A - Abrasion inspection tool of brake pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abrasion inspection tool of a brake pad for easily inspecting the abrasion state of the brake pad without removing a wheel or brake device from a vehicle.SOLUTION: As an abrasion inspection tool 1 of a brake pad, a measurement unit 3 for measuring the thickness of the brake pad is disposed at one end of a long-sized member 2. The measurement unit 3 has a residual thickness indication mark indicating the abrasion state so that the distance from an end surface of the long-sized member 2 corresponds to the thickness at the new time and the replacement timing of the brake pad.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a brake pad wear inspection tool, and more particularly to a wear check tool for inspecting the wear state of a brake pad used in a vehicle disc brake device during maintenance and inspection.

  In a vehicle disc brake device, a frictional force is generated to obtain a braking force by pressing and contacting a friction material of a brake pad against a rotating disc rotor. By braking using the brake device, the friction material of the brake pad gradually wears and the thickness decreases. In order to drive the vehicle safely, it is necessary to replace the brake pad when the thickness of the friction material is reduced to a predetermined amount.

  Since it is difficult to visually check the remaining thickness of the friction material of the brake pad from the outside of the vehicle, when the thickness of the friction material reaches a predetermined value, the metal piece comes into contact with the disc rotor and generates abnormal noise. One with an indicator was proposed. However, when performing inspections such as periodic inspections and maintenance inspections, it is necessary to use a brake tester and other dedicated devices to operate the brakes and check for abnormal noise by rotating the wheels, which complicates the work. Therefore, it was not desirable and it was necessary to inspect the wear of the brake pad by a simpler method. In addition, it has been desirable to present the test results of the amount of wear on the brake pads to the vehicle driver in a simple and easy-to-understand manner so as to facilitate the replacement of the brake pads.

  As a tool for inspecting the amount of wear of the brake pad during inspection work, two measurement protrusions are brought into contact between the brake pad and the disc rotor, and the interval between the two measurement protrusions is displayed on a dial gauge or the like. Inspection tools have been proposed (for example, Patent Document 1, Patent Document 2, etc.). However, in order to make the measurement projection of such an inspection tool abut between the brake pad and the disk rotor, it is necessary to disassemble and measure the caliper of the brake device after removing the wheel from the vehicle. It was difficult to carry out the inspection simply.

  Therefore, in Patent Document 3, in order to easily perform the inspection of the brake pad, light is irradiated from the side surface of the friction material using an optical fiber having a width corresponding to the thickness of the friction material of the brake pad, and other than the friction material. An apparatus and a method for measuring the amount of wear of a brake pad by visually observing the reflection state of light from a portion have been proposed. In Patent Document 3, since the optical fiber has flexibility, the optical fiber can be inserted through a hole or a gap formed in the wheel so as to face the side surface of the brake pad, and the wheel is still attached. The wear amount of the brake pad can be easily inspected even in the state.

  However, even with the inspection tool proposed in Patent Document 3, it is difficult to avoid the caliper of the wheel and the brake device and make the tip of the optical fiber face the side of the brake pad from the outside depending on the vehicle type and the shape of the wheel. Yes, it is not sufficient for rapid inspection at the maintenance site, and it cannot be said that it has been simplified enough.

JP 2004-150463 A Utility Model Registration No. 3029481 JP 2001-201460 A

  The present invention has been made in view of the above-described conventional problems, and it is an object of the present invention to provide a brake pad wear inspection tool for simply inspecting the wear state of a brake pad without removing a wheel or a brake device from a vehicle. And

  In order to solve the above-mentioned problems, the brake pad wear inspection tool of the present invention is characterized by having a measuring part for measuring the thickness of the brake pad at one end of the elongated member.

  In such a brake pad wear inspection tool according to the present invention, the tip of the elongated member is brought into contact with the disc rotor from the gap between the wheel and the brake caliper, and the measuring unit and the brake pad provided at one end of the elongated member Since the wear state can be confirmed visually, the wear state of the brake pad can be inspected simply and in a short time.

  In one embodiment of the present invention, the elongated member is formed of a rectangular thin plate, and the measurement unit is a remaining thickness indication mark provided on at least one long side of the square. .

  In one embodiment of the present invention, the remaining thickness instruction mark is provided at both ends of the elongated member.

  In one embodiment of the present invention, the distance from the end of the elongated member to the position where the remaining thickness instruction mark is formed corresponds to the thickness of the brake pad to be inspected when it is new and when it is replaced. It is characterized by that.

  Moreover, in one embodiment of the present invention, the remaining thickness instruction mark is a cutout part formed by cutting out a part of the elongated member.

  Moreover, in one embodiment of the present invention, the remaining thickness instruction mark is a painted portion applied to a part of the elongated member.

  According to the present invention, it is possible to provide a brake pad wear inspection tool for simply inspecting a wear state of a brake pad without removing a wheel or a brake device from a vehicle.

1 is a schematic plan view showing a brake pad wear inspection tool according to a first embodiment of the present invention. It is the elements on larger scale of a measurement part. It is a schematic diagram which shows a brake pad, (a) is an external appearance perspective view, (b) is a schematic front view, (c) is a schematic back view. It is a schematic cross section which shows the method of measuring the amount of wear of a brake pad using a wear inspection tool, and shows the state where the replacement time has not been reached. It is a schematic cross section showing a method of measuring the amount of wear of a brake pad using a wear inspection tool, and shows a state where the replacement time has been reached. It is a model external view from the vehicle side surface which shows the mode of wear amount measurement by the wear inspection tool in the state which attached the disc brake device to the vehicle. It is a model external view from the vehicle lower part which shows the mode of wear amount measurement by the abrasion test | inspection tool in the state which attached the disc brake device to the vehicle. It is a model external view from the diagonally upper direction of the vehicle showing a state of wear amount measurement by a wear inspection tool with the disc brake device attached to the vehicle. It is a mimetic diagram showing one mode of remaining thickness measurement using measuring part 4 in the state where brake pad 10 was removed. It is a schematic diagram which shows another aspect of the remaining thickness measurement using the measurement part 4 in the state which removed the brake pad 10. FIG. It is a schematic plan view which shows the abrasion test tool of the brake pad which concerns on 2nd Embodiment of this invention. It is a schematic plan view which shows the abrasion inspection tool of the brake pad which concerns on 3rd Embodiment of this invention. It is a schematic plan view which shows the abrasion test tool of the brake pad which concerns on 4th Embodiment of this invention. It is a schematic plan view which shows the abrasion test tool of the brake pad which concerns on 5th Embodiment of this invention.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic plan view showing a wear inspection tool for a brake pad according to a first embodiment of the present invention. As shown in FIG. 1, the wear inspection tool 1 for a brake pad has a long member 2 as a main body part, a measuring part 3 is provided at one end thereof, and a measuring part 4 is also provided at one end on the opposite side. ing.

  The long member 2 is a member made of a long, substantially rectangular thin plate, and has a rigidity that does not cause bending due to its own weight. Although the material which comprises the elongate member 2 is not specifically limited, Metal materials, such as iron, aluminum, stainless steel, may be sufficient, and insulating materials, such as a plastics, a ceramic, and paper, may be sufficient. Moreover, it is not necessary to have a flat plate shape, and may be a substantially cylindrical shape or a polygonal column shape as long as it is long.

  FIG. 2 is a partially enlarged view of the measurement unit 3. The measurement unit 3 is provided at one end of the long member 2 and includes notches 3a and 3b, a coating unit 3c, and grooves 3d and 3e. The cutout portions 3 a and 3 b are formed at a predetermined distance from the end face of the long member 2, and are cutout portions in which a part of the long side of the long member 2 is cut off. Specific shapes of the notches 3a and 3b are, for example, notches provided in an isosceles triangle shape having a long side as a base and about half the width of the long member 2 as a height. The coating portion 3c is a region where coating is performed from the end face of the long member 2 to a predetermined position, and is painted with a color having good visibility such as red. The region where the coating portion 3c is formed may be up to the notch portion 3a as shown in FIG. 1, or may be up to the notch portion 3b, regardless of the notch portions 3a and 3b. You may form to a predetermined distance. The grooves 3d and 3e are grooves formed by extending from the apexes of the notches 3a and 3b to the long side opposite to each other, and the distance from the end surface of the long member 2 is the same as that when the brake pad is new. This corresponds to the thickness and the thickness at the time of replacement. Moreover, it is preferable that the coating portion 3c and the grooves 3d and 3e are also provided on the back surface side of the long member 2.

  As shown in FIG. 1, the measurement unit 4 is provided at the end of the elongated member 2 on the side opposite to the measurement unit 3, and has the same notches 4 a and 4 b as the measurement unit 3, and a coating unit. 4c and grooves 4d and 4e. Also in the measurement part 4, the notches 4a and 4b, the paint part 4c, and the grooves 4d and 4e all function as remaining thickness indication marks for indicating a worn state. In the measurement unit 4, the positions where these remaining thickness instruction marks are formed are formed so that the distance from the end of the elongated member 2 is shorter than the measurement unit 3.

  The notches 3a and 3b, the paint part 3c, and the grooves 3d and 3e all function as remaining thickness indication marks for indicating a worn state. As described later, the brake is applied with a wheel and a brake caliper attached. Compared with the remaining thickness of the entire pad, it indicates the remaining amount of friction material. Further, the notches 4a and 4b, the painted portion 4c, and the grooves 4d and 4e all function as remaining thickness indication marks for indicating a worn state, and the brake pad is removed with the brake pad removed as described later. The remaining amount is compared with the remaining thickness of the friction material. Here, a configuration including notches 3a, 3b, 4a, 4b, coating portions 3c, 4c, and grooves 3d, 3e, 4d, 4e as the measurement units 3 and 4 is shown. Any one of the marks may be provided.

  FIG. 3 is a schematic diagram showing a brake pad that is an object measured by the wear inspection tool 1, FIG. 3 (a) is an external perspective view, FIG. 3 (b) is a schematic front view, and FIG. (C) is a model rear view. As shown in FIGS. 3A to 3C, the brake pad 10 includes a back plate 11 and a friction material 12.

  The back plate 11 is a plate-like member made of metal or the like, and the friction material 12 is fixed to the surface side thereof with an adhesive or the like (not shown). A mounting portion 13 for mounting a wear indicator conventionally proposed is provided from the back side to the side surface of the back plate 11. The friction material 12 is formed of a known friction material for a disc brake device. The remaining thickness inspected by the wear inspection tool 1 described above is either the total thickness of the brake pad in which the thicknesses of the back plate 11 and the friction material 12 shown in FIG. 3 are combined, or the thickness of only the friction material 12. Means.

  4 and 5 are schematic cross-sectional views showing a method of measuring the amount of wear of the brake pad 10 using the wear inspection tool 1, FIG. 4 shows a state where the replacement time has not been reached, and FIG. It shows the reached state. As shown in FIGS. 4 and 5, when the disc brake device is attached to the vehicle, two brake pads 10 are arranged so as to sandwich both sides of the disc rotor 14. In the figure, a state is shown in which a slight gap is provided between the friction material 12 and the disk rotor 14, and a state in which no braking force is applied is shown, but the friction material 12 is pressed against the disk rotor 14. May be. Here, other components of the disc brake device are omitted.

  In order to measure the wear amount with the brake pad 10 attached to the vehicle, as shown in FIGS. 4 and 5, the measuring unit 3 of the wear inspection tool 1 is inserted into a position adjacent to the brake pad 10, and the wear inspection tool is inserted. 1 is brought into contact with the disk rotor 14 substantially vertically. In this state, the remaining thickness of the entire brake pad 10 is measured by comparing the position on the back surface side of the back plate 11 and the measuring unit 3, and it is determined whether the wear amount of the friction material 12 has reached the replacement time. be able to.

  More specifically, the distance from the end face of the wear inspection tool 1 to the notch 3b and the groove 3e corresponds to the total thickness of the back plate 11 and the friction material 12 when new, and the notch 3a from the end face and The distance to the groove 3d corresponds to the total thickness of the friction material 12 and the back plate 11 that have reached the replacement time. Therefore, as shown in FIG. 4, when the back side of the back plate 11 is located between the notch 3a and the notch 3b, that is, between the groove 3d and the groove 3e, the friction material 12 It can be determined that the amount of wear has not reached the replacement time. Or when the back surface side of the back plate 11 is not located in the area | region of the coating part 3c, it can be judged that the abrasion loss of the friction material 12 has not reached replacement | exchange time.

  On the other hand, as shown in FIG. 5, when the back surface side of the back plate 11 is located closer to the disk rotor 14 on the end surface side than the notch 3a and the groove 3d, the wear amount of the friction material 12 is determined at the replacement time. It can be judged that it has reached. Or as shown in FIG. 5, when the back surface side of the backplate 11 is located in the area | region of the coating part 3c, it can be judged that the abrasion loss of the friction material 12 has reached the replacement time.

  In this way, it is possible to determine whether the wear amount of the friction material 12 has reached the replacement time by simply inserting the wear inspection tool 1 adjacent to the brake pad 10 and visually confirming it, so that the wheel and brake device are removed from the vehicle. It is possible to easily inspect the wear state of the brake pads.

  6 to 8 are schematic external views showing a state of wear amount measurement by the wear inspection tool with the disc brake device attached to the vehicle, FIG. 6 is a schematic external view from the side of the vehicle, and FIG. FIG. 8 is a schematic external view from obliquely above the vehicle. In the figure, for the sake of simplification, the state in which the wheel is removed is shown, but the periphery of the disc brake device is the same as in FIGS. Visible.

  As shown in FIGS. 6 to 8, the disc rotor 14 is formed integrally with a hub 15 to which wheels are attached, and a disc brake device including a caliper body 16 and a mounting bracket 17 is attached to a partial region of the disc rotor 14. ing. As shown in the figure, a gap is provided between the caliper body 16 and the mounting bracket 17, and the inner back plate 11 and the disc rotor 14 are exposed from the gap. At this time, since the friction material 12 of the brake pad 10 is attached to face the disk rotor 14, the friction material 12 may be hidden behind the back plate 11 and it may be difficult to directly recognize the remaining thickness of the friction material 12. At least the back side of the back plate 11 is relatively easily visible.

  Therefore, as shown in FIGS. 6 to 8, the wear inspection tool 1 is inserted into the gap between the caliper body 16 and the mounting bracket 17, and the end surface of the measuring unit 3 is slid on the disk rotor 14 as shown in FIGS. It abuts on the surface 14a. Since the wear inspection tool 1 is composed of an elongated long member 2, even when the gap between the caliper body 16 and the mounting bracket 17 is relatively small, it can be easily inserted from the gap to the disk rotor 14. . When the position where the wear inspection tool 1 is inserted is close to the outer periphery of the disk rotor 14, it can be viewed from the side of the vehicle as shown in FIG. 6 or can be aimed from the upper side of the vehicle as shown in FIG. . Further, when the position where the wear inspection tool 1 is inserted is close to the inner periphery of the disk rotor 14, it can be visually observed from the lower side of the vehicle or the central axis direction of the wheel as shown in FIG.

  At this time, when the remaining thickness of the friction material 12 is measured using the notch portions 3a and 3b as the remaining thickness indication marks of the measurement unit 3, light is notch 3a and 3b from the rear of the wear inspection tool 1. By passing, it becomes easy to visually recognize the positional relationship between the back surface of the back plate 11 and the notches 3a and 3b. Further, when the remaining thickness of the friction material 12 is measured using the coating portion 3c as the remaining thickness indication mark of the measuring portion 3, the coating portion 3c can be irradiated with light from various directions such as light from the operator side. By setting the color of the coating part 3c to a color different from that of the surrounding members, it becomes easy to visually recognize the positional relationship between the back surface of the back plate 11 and the coating part 3c. Furthermore, when the remaining thickness of the friction material 12 is measured using the grooves 3d and 3e as the remaining thickness indication marks of the measuring unit 3, the relationship between the light irradiation position on the measuring unit 3 and the visual position is limited. Even when the wear inspection tool 1 is rotated about the longitudinal direction of the wear inspection tool 1, preferred light reflection around the grooves 3d, 3e can be obtained, and the back surface of the back plate 11 and the grooves 3d, 3d, It becomes easy to visually recognize the positional relationship of 3e.

  As described above, the remaining thickness of the friction material 12 is measured by inserting the wear inspection tool 1 into the gap between the caliper body 16 and the mounting bracket 17 using the wear inspection tool 1 which is a long member. Therefore, the wear inspection tool 1 can be very easily adjacent to the brake pad 10 and the positional relationship between the remaining thickness indication mark of the measurement unit 3 and the back surface of the back plate 11 can be visually recognized from various directions. . Therefore, it is possible to easily inspect the wear state of the brake pad 10 without removing the wheel or the brake device from the vehicle.

  Next, the measurement of the remaining thickness of the friction material 12 using the measuring unit 4 of the wear inspection tool 1 will be described with reference to FIGS. 9 and 10 are schematic views showing a state in which the caliper body 16 of the disc brake device is disassembled and the brake pad 10 is removed. FIG. 9 shows an embodiment using the measuring unit 4, and FIG. The other aspect using the part 4 is shown.

  The measurement of the remaining thickness of the friction material 12 using the measurement unit 3 is a measurement in a state where the wheel and the disc brake device are not removed as described with reference to FIGS. The comparison was made with the total thickness of the back plate 11 and the friction material 12. On the other hand, the remaining thickness measurement in the measuring unit 4 is performed with the brake pad 10 removed, so that the remaining thickness indication mark in the measuring unit 4 is compared with the thickness of the friction material 12 alone. More specifically, the distance from the end surface of the wear inspection tool 1 to the notch 4b and the groove 4e corresponds to the thickness of the friction material 12 when new, and the distance from the end surface to the notch 4a and the groove 4d. This corresponds to the thickness of the friction material 12 that has reached the replacement time.

  Therefore, as shown in FIG. 9, in the measurement using the measurement unit 4, the notch 4 a and the groove 4 d which are remaining thickness instruction marks are aligned with the joint surface between the back plate 11 and the friction material 12, and the friction material 12 is positioned. Compare with thickness. Thereby, when the remaining thickness of the friction material 12 is smaller than the distance from the end surface of the wear inspection tool 1 to the notch 4a and the groove 4d, it can be determined that the amount of wear has reached the replacement time. It can be judged that the amount of wear has not reached the replacement time. Similarly, even if the region of the coating portion 4c and the remaining thickness of the friction material 12 are compared, if the remaining thickness of the friction material 12 is small, it can be determined that the amount of wear has reached the replacement time, It can be judged that the amount of wear has not reached the replacement time.

  Further, as shown in FIG. 10, the end surface of the wear inspection tool 1 may be brought into contact with the joint surface 11 a of the back plate 11 with the friction material 12, and the remaining thickness indication mark may be compared with the thickness of the friction material 12. . Similarly to the method shown in FIG. 9, when the remaining thickness of the friction material 12 is smaller than the distance from the end face of the wear inspection tool 1 to the notch 4a and the groove 4d, the amount of wear has reached the replacement time. If it is large, it can be determined that the wear amount has not reached the replacement time. Similarly, even if the region of the coating portion 4c and the remaining thickness of the friction material 12 are compared, if the remaining thickness of the friction material 12 is small, it can be determined that the amount of wear has reached the replacement time, It can be judged that the amount of wear has not reached the replacement time.

  Thus, by providing the measuring part 4 at the end opposite to the measuring part 3 of the wear inspection tool 1, the friction material 12 can be obtained using the same wear inspection tool 1 even when the brake pad 10 is removed from the vehicle. It can be simply shown that the remaining thickness of the metal has reached the replacement time. As a result, the operator of the inspection work inspects the remaining thickness of the friction material 12 using the measuring unit 3 with the wheel and the disc brake device attached to the vehicle, determines that the replacement time has been reached, and determines the brake pad 10 After the removal, the vehicle owner can be visually informed easily that it is the replacement time while presenting the brake pad 10 using the measuring unit 4.

  As described above, by using the wear inspection tool 1 having the measuring unit 3 at one end of the long member of the present invention, the measuring unit 3 is inserted into a position adjacent to the brake pad 10, and Since it is possible to determine whether the wear amount of the friction material 12 has reached the replacement time by simply checking the back surface and the measuring unit 3, the wear state of the brake pad is simply inspected without removing the wheel or the brake device from the vehicle. It becomes possible.

(Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to the drawings. A description of portions common to the first embodiment is omitted. FIG. 11 is a schematic plan view showing a wear inspection tool for a brake pad according to a second embodiment of the present invention.

  In this embodiment, the wear inspection tool 21 for a brake pad has a long member 2 as a main body part, a measuring part 3 is provided at one end thereof, and a hole is formed in the long member 2 at one end on the opposite side. 5 is formed, and the chain 6 is passed through the hole 5. The remaining thickness measurement of the friction material 12 of the brake pad 10 using the wear inspection tool 21 is also measured using the measuring unit 3 in the state where the wheel and the disc brake device are attached to the vehicle, as in the first embodiment.

  In this embodiment, since the chain 6 is passed through the hole 5, the wear inspection tool 21 having specifications corresponding to a plurality of types of brake pads 10 can be bundled with one chain. For this reason, even when handling a wide variety of brake pads 10 in the inspection work, the necessary wear inspection tool 21 can be easily selected, and workability is improved.

(Third embodiment)
Next, a third embodiment of the present invention will be described in detail with reference to the drawings. A description of portions common to the first embodiment is omitted. FIG. 12 is a schematic plan view showing a brake pad wear inspection tool according to a third embodiment of the present invention.

  In the present embodiment, the wear inspection tool 31 for a brake pad has the elongated member 2 as a main body part, the measurement part 3 is provided at one end thereof, and the measurement part 4 is provided at one end of the opposite side. Yes. The elongate member 2 which is a main body part has the expansion-contraction mechanism 7, and can change length as needed. As the expansion / contraction mechanism 7, a known structure such as a telescopic or a cantilever support structure can be used, and a specific structure is not limited.

  Also in the present embodiment, the remaining thickness of the friction material 12 of the brake pad 10 using the wear inspection tool 31 is measured using the measuring unit 3 in a state where wheels and a disc brake device are attached to the vehicle as in the first embodiment. When the brake pad 10 is removed, the measurement unit 4 is used for measurement.

In the present embodiment, the wear inspection tool 31 can be downsized to improve the portability during the inspection work, and when measuring the remaining thickness of the friction material 12, it is extended as necessary to a position adjacent to the brake pad 10. Workability is improved because it can be inserted.
(Fourth embodiment)

  Next, a fourth embodiment of the present invention will be described in detail with reference to the drawings. A description of portions common to the first embodiment is omitted. FIG. 13 is a schematic plan view showing a brake pad wear inspection tool according to a fourth embodiment of the present invention.

  In the present embodiment, the brake pad wear inspection tool 41 has the elongated member 2 as a main body part, the measuring part 3 is provided at one end thereof, and a rotating shaft 8 is formed at one end on the opposite side. Various types of elongated members 2 are bundled so as to be rotatable about a rotation shaft 8. The remaining thickness measurement of the friction material 12 of the brake pad 10 using the wear inspection tool 41 is also measured with the wheels and the disc brake device attached to the vehicle using the measurement unit 3 as in the first embodiment.

  In the present embodiment, the measurement units 3 having specifications corresponding to a plurality of types of brake pads 10 are provided in the plurality of measurement units 3 and can be bundled together with the rotating shaft 8 as the wear inspection tool 41, so that various brake pads can be used for inspection work. Even when 10 is handled, the necessary long member 2 and measurement unit 3 can be easily selected, and workability is improved.

  Further, if all the elongated members 2 are bundled in the same direction with the rotary shaft 8 as the center, the wear inspection tool 41 can be reduced in size, and the portability during the inspection work can be improved. Similarly to the expansion and contraction mechanism in the third embodiment, the wear inspection tool is selected by selecting the elongated member 2 of the measuring unit 3 corresponding to the specification of the brake pad 10 to be measured and rotating it to the opposite side. Since the length of 41 can be extended and it can insert in the position adjacent to the brake pad 10, workability | operativity also improves.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described in detail with reference to the drawings. A description of portions common to the first embodiment is omitted. FIG. 14 is a schematic plan view showing a wear inspection tool for a brake pad according to a fifth embodiment of the present invention.

  In the present embodiment, another aspect of the remaining thickness instruction mark of the measurement unit 3 will be described. As shown in FIGS. 14 (a) and 14 (b), the measurement unit 3 is provided with width changing portions 3f and 3g in which the width of the elongated member 2 which is the main body portion is changed, and from the end surface to the width changing portion 3f. The region is painted to form a painted portion 3c. The width changing portions 3f and 3g are formed at a predetermined distance from the end surface of the long member 2, and the distance from the end surface of the long member 2 to the width changing portion 3g is the back plate 11 and the friction material when new. 12, the distance from the end face to the width changing portion 3f and the region of the coating portion 3c correspond to the total thickness of the back plate 11 and the friction material 12 at the replacement time.

  Although only the measurement unit 3 is shown in FIG. 14, the remaining thickness instruction mark can also be configured for the measurement unit 4 with the same structure. In the present embodiment, the measurement of the remaining thickness of the friction material 12 of the brake pad 10 using the measuring units 3 and 4 is the same as that in the first embodiment.

  Furthermore, as another aspect of the remaining thickness indicating mark indicating the time of replacement and replacement, the long member 2 is made of a transparent member such as plastic and a scale is formed, or depending on the distance from the end face For example, color-coding the painted part.

1, 21, 31, 41 ... wear inspection tool 2 ... elongate member 3, 4 ... measurement part 3a, 3b, 4a, 4b ... notch part 3c, 4c ... coating part 3d, 3e, 4d, 4e ... groove 3f , 3 g ... width changing part 5 ... hole 6 ... chain 7 ... telescopic mechanism 8 ... rotating shaft 10 ... brake pad 11 ... back plate 12 ... friction material 13 ... mounting part 14 ... disk rotor 15 ... hub 16 ... caliper body 17 ... mounting bracket

Claims (6)

  A brake pad wear inspection tool comprising a measuring part for measuring the thickness of a brake pad at one end of a long member. The brake pad wear inspection tool according to claim 1,
The brake pad wear tester according to claim 1, wherein the elongated member is formed of a rectangular thin plate, and the measuring portion is a remaining thickness indicating mark provided on at least one long side of the square. The brake pad wear inspection tool according to claim 2,
The brake pad wear inspection tool, wherein the remaining thickness instruction mark is provided at both ends of the elongated member. The brake pad wear inspection tool according to claim 2 or 3,
Brake pad wear inspection, characterized in that the distance from the end of the elongated member to the position where the remaining thickness instruction mark is formed corresponds to the thickness of the brake pad to be inspected when it is new and when it is replaced. Ingredients. A wear test tool for a brake pad according to any one of claims 2 to 4,
The brake pad wear inspection tool according to claim 1, wherein the remaining thickness instruction mark is a notch formed by cutting out a part of the elongated member. A wear test tool for a brake pad according to any one of claims 2 to 4,
The brake pad wear tester according to claim 1, wherein the remaining thickness instruction mark is a painted portion formed on a part of the elongated member.

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