JP3488697B2 - Rail wear measurement ruler based on the rail upper neck - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail wear measuring ruler based on the rail upper neck. 2. Description of the Related Art A conventional rail wear measuring ruler is provided with a pressing plate 4 formed so as to press against the bottom 2 and the abdomen 3 of a rail 1 as shown in FIG. Is provided with a support plate 7 having a grip portion 5 and a pressing plate 6 that presses against the upper surface and the side surface of the bottom portion 2 of the rail 1, and the upper end of the support plate 7 covers the top of the head of the rail 1. The support plate 8 is formed into a plurality of calipers 10 (four vernier calipers in FIG. 2 are attached) so that the tip 10A slides against the head 9 of the rail 1. Are attached to the head 9 of the rail 1 with an angle 10B. In the conventional rail wear measuring ruler described above, since there is a pressing plate 6, the abdomen 3 of the rail 1 is provided.
There is a fault that a rail wear measuring ruler cannot be installed in places where cables are attached to, snowmelters (heaters), or where there are points, and there is nothing on the abdomen of the rail 1 In places not provided, the pressing plate 4 is moved as shown in FIG.
It can be installed by applying a force so as to be in close contact with the bottom 2 and the abdomen 3 of the rail 1, as shown in FIG. Since the scale is complicated and misreading may occur, there is a drawback in that an error (individual difference) occurs in the measurement and the measurement accuracy tends to be inaccurate. The present invention seeks to provide a rail wear measuring ruler based on the rail upper neck that can eliminate such drawbacks. In order to achieve the above object, the present invention provides a base plate that covers the top of the rail head and has a grip portion. Multiple digital measuring rulers with built-in batteries and an electronic circuit designed to display a measurement value proportional to the amount of slide of the measuring scale that is slid so that the tip contacts the rail head. The base plate is attached at an angle, and an arm formed so as to contact the rail head is provided on the grip portion side of the base plate, and the tip of the arm is rolled to the rail upper neck of the rail head. A bearing to be moved is attached, and a magnet is attached to a portion of the arm that is brought into contact with the side surface of the rail head. DETAILED DESCRIPTION OF THE INVENTION Covering the top of a rail head, and
A base plate formed to have a grip portion is provided. A plurality of digital measuring instruments with a built-in battery and an electronic circuit designed to display a measurement value proportional to the slide amount of a measuring scale that slides so that the tip of the base plate abuts against the rail head Are attached at an angle to the rail head. On the grip part side of the base plate, an arm that is integrally molded so as to contact the side surface of the rail head is provided, and a bearing that rolls to the upper neck of the rail head is attached to the tip of the arm. Among them, a magnet is attached to a portion to be brought into contact with the rail head side surface. In the rail wear measuring ruler having the above-described configuration, the bearing is rolled on the upper neck of the rail head while the grip portion is gripped manually, and the arm is brought into close contact with the side surface of the rail head. Then, the arm is firmly fixed to the side surface of the rail head by the magnetic force of the magnet, and the entire rail wear measuring ruler is installed on the rail head. Therefore, the measuring scales of a plurality of digital measuring rulers are slid so that their tips abut against the rail head. Then, a measurement value proportional to the slide amount is displayed through a window frame provided on the digital measurement ruler, and the amount of wear on the top surface of the rail to be measured can be read at a glance. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG. 1. Reference numeral 11 denotes an aluminum casting made of an aluminum casting formed so as to cover a rail head 12 and to have a grip portion 13. Appropriate paint such as baking finish is applied to the base plate after anodizing. The base plate 11 has a battery (not shown).
And an electronic circuit designed to display through the window frame 17 a measurement value 16 proportional to the sliding amount of the measuring scale 15 that slides the tip 14 against the rail head 12 (not shown). A plurality of, for example, two digital measuring rulers 18A and 18B are attached to the outer rail side of the rail with an angle 19 with respect to the rail head portion 12. Note that the digital measurement ruler 18A may be attached, for example, so as to be opposed to the center of the rail top surface, or may be attached by being shifted 10 mm from the center toward the inner track side. Base plate 1
1, the arm 20 integrally formed so as to contact the rail head 12 is provided on the grip 13 side. A bearing 22 that rolls on the rail upper neck 21 of the rail head 12 is attached to the tip of the arm 20, and the amount of wear of the rail head 12 is measured using the rail upper neck 21 as a reference. A permanent magnet 23 is attached to a portion of the arm 20 that contacts the side surface of the rail head portion 12. A plurality of required digital measurement rulers 18A and 18B attached to the base plate described above include an ON / OFF push button switch electrically connected to an electronic circuit incorporated therein,
A battery cover is provided for the ZERO / ABS push button switch, ORIGIN push button switch, HOLD push button switch, and the built-in battery. When the ON / OFF pushbutton switch is operated to ON, the measured value 16 of the amount of wear of the rail head 12 is displayed through the window frame 17 and enters the measurement state.
The ZERO / ABS pushbutton switch switches between the comparative measurement and the absolute value measurement in the above measurement state. The comparative measurement is performed by setting an arbitrary position to “0”. The measurement is based on “0”.
The ORIGIN pushbutton switch is pressed for more than 1 second when setting the absolute origin in the design of the measuring instrument. This setting is valid until the battery runs out, and is set when the battery has expired for about 3 years and has been replaced. It does not change with normal power ON / OFF operations. When the HOLD pushbutton switch is turned ON, the display of the measured value of the wear amount at the rail head 12 is held, and remains on the window frame 17 even if it is removed from the rail wear measurement ruler. The present invention is not limited to the above embodiment, and the permanent magnet 23 may be replaced with an electromagnet or the like.
Further, the grip portion 13 and the arm 20 may be formed separately from the base plate 14 and attached to the base plate 14 respectively. Moreover, the base plate 11 and the grip part 1
3 and the arm 20 may be formed of iron, plastic, or other suitable material. Since the present invention is configured as described above,
The following effects are produced. (1) Since it is configured to measure the amount of wear on the rail head with reference to the upper neck of the rail head,
Rail wear measurement rulers can be installed even at locations where cables, snowmelters (heaters), points, etc. are attached. (2) Since a bearing that rolls on the top of the rail is attached to the tip of the arm, the rail wear measurement ruler can be easily installed on the part to be measured on the rail head. (3) Since the magnet is attached to the part of the arm that makes contact with the side of the rail head, the rail wear measurement ruler can be firmly fixed to the part of the rail head to be measured.
The rail wear measurement ruler will never shift during measurement. In addition, the measured value of the amount of wear on the rail head is displayed through the window frame provided on the digital measuring instrument and can be read at a glance, so that the measurement accuracy is accurate and the error (individual difference) varies depending on the measurer. It never happens.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a rail wear measuring ruler based on a rail upper neck according to the present invention. FIG. 2 is a diagram showing a state in which the amount of wear on the rail head is measured with a conventional rail wear measuring ruler. [Description of Symbols] 11 Base plate 12 Rail head 13 Grip part 14 Measuring scale tip 15 Measuring scale 16 Measuring value 17 Window frame 18A, 18B Digital measuring ruler 19 Angle 20 Arm 21 Rail upper neck 22 Bearing 23 Permanent magnet

Front page continuation (72) Inventor Sakae Nakazawa 2-5-5 Yoyogi, Shibuya-ku, Tokyo Toin Japan Railway Company (72) Inventor Kenichiro Seki 2-5-5 Yoyogi 2-chome, Shibuya-ku, Tokyo (72) Inventor Masafumi Kawashima 1-36-2 Matsushima, Edogawa-ku, Tokyo Harada Manufacturing Co., Ltd. (72) Inventor Zenichi Yokoshima 1-36-2 1-2 Matsushima, Edogawa-ku, Tokyo Harada Works (72) Inventor Katsumi Nomura 1-36, Matsushima 1-chome 36-2 Edogawa-ku, Tokyo Co., Ltd. Harada Works (72) Inventor Norio Sasakura 1-36-2 Matsushima 1-chome Edogawa-ku, Tokyo (56) References Japanese Patent Laid-Open No. 10-73401 (JP, A) Shokai Sho 54-67946 (JP, U) (58) Fields studied (Int. Cl. ⁷ , DB name) G01B 5/00-5 / 30 G01B 21/00-21/32 E01B 27/00-37/00

Claims (1)

(57) Claims 1. A base plate 11 that covers the top of a rail head 12 and has a grip portion 13 has a battery and a tip 14 connected to the rail head. A plurality of digital measurement rulers 18 including an electronic circuit designed to display a measurement value 16 proportional to the slide amount of the measurement scale 15 that is slid so as to abut against the section 12 are connected to the rail head 1.
2 to each other with an angle 19 attached to the base plate 1
1 is provided with an arm 20 formed so as to be in contact with the side surface of the rail head portion 12.
Among them, a bearing 22 is attached to the tip of the rail head 12 so as to roll on the rail upper neck 21 of the rail head 12, and a rail having a magnet 23 attached to a portion of the arm 20 that contacts the side surface of the rail head 12. Rail wear measurement ruler based on the upper neck 21.