JP2021081323A - Tangential force measuring device - Google Patents

Abstract

To provide a tangential force measuring device capable of continuously measuring tangential force with a simple structure.SOLUTION: A tangential force measuring device 4 measures tangential force generated by slip between a wheel and a rail; continuously rolls a measurement wheel 14 along a rail 2A at a predetermined attack angle θA so that horizontal tangential force is generated in the horizontal direction of the rail 2A; and detects this horizontal tangential force with a tangential force detection unit. Guide wheels 9A, 9B guide the measurement wheel 14 while rolling along a head side surface 2e of the rail 2A so that the measurement wheel 14 rolls along a predetermined position on a head top surface 2d of the rail 2A. A load action unit 21d applies a substantially constant load to the guide wheels 9A, 9B so that the guide wheels 9A, 9B are in close contact with the head side surface 2e of the rail 2A.SELECTED DRAWING: Figure 4

Description

The present invention relates to a tangential force measuring device that measures a tangential force generated by slippage between wheels / rails.

Conventionally, various methods have been proposed as methods for measuring the coefficient of friction of railway rails. The conventional rail friction measuring device (hereinafter referred to as the prior art 1) includes a plurality of steel balls in contact with the rail crown surface, a weight for pressing the plurality of steel balls against the rail crown surface, and a rail crown surface. It includes a load cell that measures the frictional force generated between the steel balls and a dynamic strain amplifier that measures the friction coefficient between them (see, for example, Patent Document 1). In the prior art 1, the frictional force generated when a plurality of steel balls are moved while being pressed against the top surface of the rail is measured by a load cell, and the friction coefficient is measured by a dynamic strain amplifier.

The conventional pendulum type rail top surface friction measuring device (hereinafter referred to as the prior art 2) includes a pendulum type weight, a swing arm that supports the weight so as to slide on the rail top surface, and this swing arm. It is equipped with a support column that rotatably supports the rail, a mounting unit that attaches the support column to the rail detachably, and a measurement unit that measures the energy loss when the weight slides on the top surface of the rail (Non-Patent Document). 1). In the prior art 2, the pendulum-shaped weight is swung down so as to slide on the top surface of the rail, and the slip resistance of the top surface of the rail is measured.

The conventional rolling type rail friction measuring device (hereinafter referred to as the prior art 3) includes a rolling type wheel in contact with the rail, a braking force acting portion for applying a braking force to the wheel, and the like (for example,). See Non-Patent Document 2). In the prior art 3, the braking force acting on the rolling wheel is gradually increased in a state where the wheel is in contact with the top surface of the rail, and the friction coefficient when the wheel starts to slip is evaluated.

Japanese Unexamined Patent Publication No. 2004-294303

Roger Lewis, Stephen R Lewis, Yi Zhu, Saeed Abbasi, Ulf Olofsson,'The modification of a slip resistance meter for measurement of railhead adhesion', Journal of RAIL AND RAPID TRANSIT, 227 (2) 196-200, <URL: https //www.researchgate.net/publication/283054268_The_Modification_of_a_Slip_Resistance_Meter_for_Measurement_of_Railhead_Adhesion>

Jan Lundberg, Matti Rantatalo, Christina Wanhainen, Johan Casselgren,'Measurements of friction coefficients between rails lubricated with a friction modifier and the wheels of an IORE locomotive during real working condition' Wear 324-325 (2015) 109-117, <URL: https://www.sciencedirect.com/science/article/pii/S0043164814003718>

In the prior art 1, as shown in FIG. 28, a non-rolling steel ball 114A is fixed to the lower surface of the device, and the steel ball 114A is pressed onto the crown surface 102d of the rail 102 by a weight installed in the device. Therefore, the coefficient of friction is calculated by dividing the resistance force when dragging the weight by the weight of the weight. In the prior art 1, when the steel ball 114A is moved along the rail 102 while the steel ball 114A is pressed against the crown surface 102d of the rail 102, the deposit (coating substance) D on the rail 102 becomes the steel ball 114A and the rail. The steel ball 114A scrapes the deposit D without entering between the 102 and the 102. Therefore, the prior art 1 has a problem that the friction coefficient is measured in a state different from the actual phenomenon. Further, in the prior art 1, when the rail 102 and the steel ball 114A are continuously slid, the contact point of the steel ball 114A in contact with the rail 102 shown in FIG. 28 (A) is worn, and the friction coefficient is measured. There is a problem that the conditions change.

In the prior art 2, it is necessary to mount the swing arm on the rail every time the coefficient of friction is measured and rotate the swing arm to slide the weight on the top surface of the rail. Therefore, in the prior art 2, there is a problem that it takes time and effort to measure the friction coefficient, and the friction coefficient on the top surface of the rail becomes a discrete measurement result, so that the friction coefficient cannot be continuously measured. There is a point.

As shown in FIG. 29, the prior art 3 includes a mechanism that causes a speed difference between the wheel 114B and the rail 102 by rotating the wheel 114B slightly faster or slightly slower than the rail 102. In the prior art 3, the urging force of the spring of the braking force acting portion that exerts a braking force on the wheel 114B gradually becomes stronger, and the frictional force when the wheel 114B slides on the crown surface 102d of the rail 102 is evaluated. .. Therefore, the prior art 3 requires a tension mechanism such as an electromagnetic brake or a wire for applying a braking force to the wheel 114B, which causes a problem that the device becomes complicated and the weight increases. Further, in the prior art 3, since the wheel 114B has a structure in which the friction coefficient is measured while intermittently sliding on the rail 102, the measurement result of the friction coefficient of the crown surface 102d of the rail 102 is discrete as in the prior art 2. Therefore, there is a problem that the coefficient of friction cannot be continuously measured.

An object of the present invention is to provide a tangential force measuring device capable of continuously measuring a tangential force with a simple structure.

The present invention solves the above problems by means of solutions as described below.
Although the description will be given with reference numerals corresponding to the embodiments of the present invention, the present invention is not limited to this embodiment.
The invention of claim 1 applies a tangential force (T) generated by slipping between wheels / rails, as shown in FIGS. 1, 3, 5, 10, 10, 19, 19 and 23-27. A tangential force measuring device for measurement that continuously rolls along a rail (2A) at a predetermined attack angle (θ _A ) so that a left and right tangential force (T _{1) is generated in the left-right direction.} It is a tangential force measuring device (4) including a wheel (14) and a tangential force detecting unit (18) for detecting the left and right tangential force.

The invention of claim 2 is the tangential force measuring device according to claim 1, as shown in FIGS. 1, 3 to 8, 15, 15, 19, 20, 24 and 26, of the rail. Guide wheels (9A, 9B) that guide the measurement wheel while rolling along the head side surface (2e) of the rail so that the measurement wheel rolls along a predetermined position on the crown surface (2d), and the rail. The tangential force measuring device is provided with a load acting portion (21d) for applying a substantially constant load to the guide wheels so that the guide wheels are in close contact with the side surface of the head.

According to the third aspect of the present invention, in the tangential force measuring device according to the second aspect, as shown in FIGS. 4, 6, 8, 15, 19, 24 and 26, the rail on which the measuring wheel rolls. A load-bearing wheel (21b) that receives _{a load (F 0} ) acting from the left-right direction of the rolling rail while rolling along the head side surface (2e) of the rail (2B) on the opposite side of (2A). The load acting portion is a tangential force measuring device, characterized in that a substantially constant load is applied to the load receiving wheels so that the load receiving wheels are in close contact with the head surface side surface of the rail on the opposite side. Is.

According to the invention of claim 4, in the tangential force measuring device according to claim 3, as shown in FIG. 16, when the distance between the left and right rails (2A, 2B) is widened, the load acting portion is widened. The tangential force measuring device is characterized in that a substantially constant load is applied to the load receiving wheels so that the load receiving wheels are in close contact with the head side surface (2e) of the opposite rail (2B).

The invention of claim 5 is the tangential force measuring device according to any one of claims 1 to 4, according to FIGS. 1, 3 to 5, 8, 9, 9, 11 and 12. As shown, the measuring wheel rolls along the inner rail side rail (2A) of the curved section, and the tangential force detecting unit detects the left and right tangential force of the inner rail side rail. It is a measuring device.

According to the invention of claim 6, in the tangential force measuring device according to any one of claims 1 to 4, as shown in FIG. 24, the measuring wheel is attached to the right rail (2A) of the straight section. The right measuring wheel (14A) that rolls along the right side and the left side measuring wheel (14B) that rolls along the left side rail (2B) of the straight section are provided, and the tangential force detecting unit is the left and right tangential force of the right side rail. (T ₁₎ right tangential force detecting unit that detects a and (18A), tangent, characterized in that it comprises a lateral tangential force of the left rail (T ₁₎ tangential force detecting portion of the left for detecting the (18B) It is a force measuring device.

According to the invention of claim 7, in the tangential force measuring device according to any one of claims 1 to 4, as shown in FIGS. 26 and 27, the measuring wheel is on the inner rail side of the curved section. The tangential force detection unit is provided with an inner rail measuring wheel (14A) that rolls along the rail (2A) and an outer rail measuring wheel (14B) that rolls along the outer rail side rail (2B) of the curved section. Is the tangential force detection unit (18A) of the inner rail that detects the left and right tangential force (T _{1 ) of the inner rail side rail, and the tangential line of the outer rail that detects the left and right tangential force (T 1} ) of the outer rail side rail. It is a tangential force measuring device including a force detecting unit (18B).

According to the invention of claim 8, in the tangential force measuring device according to claim 7, lateral pressure (Q) is generated in the left-right direction of the outer rail side rail of the curved section as shown in FIGS. 26 and 27. The tangential force is provided with an outer rail measuring wheel (38) that rolls along the gauge corner (2f) of the outer rail side rail, and a lateral pressure detecting unit (41) that detects the lateral pressure. It is a measuring device.

According to the invention of claim 9, in the tangential force measuring device according to any one of claims 1 to 4, as shown in FIGS. 19 to 23, the measuring wheel is on the inner rail side of the curved section. Rolling along the rail (2A), the tangential force detecting unit detects the left and right tangential force of the inner rail side rail, and a lateral pressure (Q) is applied to the outer rail side rail (2B) in the curved section in the left-right direction. It is characterized by including an outer rail measuring wheel (38) that rolls along a gauge corner (2f) of the outer rail side rail so as to generate, and a lateral pressure detecting unit (41) that detects the lateral pressure. It is a tangential force measuring device.

The invention of claim 10 is the tangential force measuring device according to any one of claims 5 to 9, as shown in FIGS. 12, 23, 25 and 27. The tangential force measuring device is provided with a friction coefficient calculating unit (31) for calculating a friction coefficient (μ) between the measuring wheel and the rail based on the detection result of the above.

According to the invention of claim 11, in the contact force measuring device according to claim 8 or 9, as shown in FIGS. 23 and 27, the measuring wheel and the measuring wheel are based on the detection result of the lateral pressure detecting unit. It is a tangential force measuring device characterized by including a friction coefficient calculation unit (31) for calculating a friction coefficient (μ) with and from a rail.

The invention of claim 12 is the tangential force measuring device according to any one of claims 1 to 11, as shown in FIGS. 3, 6 to 9, 12 and 14. It is characterized by including an inclination angle measuring unit (29) for measuring an inclination angle _{(θ C} ) of the measuring wheel when the measuring wheel rolls along a rail (2A) in a curved section to which C) is attached. It is a tangential force measuring device.

According to the thirteenth aspect of the present invention, in the tangential force measuring device according to any one of claims 1 to 12, as shown in FIGS. 5 and 12, the state of the rail surface on which the measuring wheel rolls is photographed. It is a tangential force measuring device including a photographing unit (32) for displaying a photographed image and a display unit (33) for displaying a photographed image photographed by the photographing unit.

According to the invention of claim 14, in the tangential force measuring device according to any one of claims 1 to 13, as shown in FIG. 13, the measuring wheel is the direction of rotation of the measuring wheel during reciprocating measurement. This is a tangential force measuring device characterized in that the measuring wheels are detachably mounted by changing the direction of the measuring wheels so that the wheels are in the same direction.

The invention of claim 15 is the tangential force measuring device according to any one of claims 1 to 14, as shown in FIGS. 10 to 12, the tangential force detecting unit is the left and right tangential force. It is a tangential force measuring device characterized by detecting the _{front-rear tangential force (T 2} ) generated in the front-rear direction of the rail as well as detecting the above.

According to the present invention, the tangential force can be continuously measured by a simple structure.

It is a perspective view which shows typically the use state of the tangential force measuring apparatus which concerns on 1st Embodiment of this invention. FIG. 5 is a schematic view of a state in which the wheels of the vehicle roll on a rail on which the tangential force is measured by the tangential force measuring device according to the first embodiment of the present invention, (A) is a plan view, and (B) is (A). ) Is a cross-sectional view showing a state cut along the line II-IIB. It is a top view of the tangential force measuring apparatus which concerns on 1st Embodiment of this invention. It is a schematic diagram of the tangential force measuring apparatus which concerns on 1st Embodiment of this invention. It is a schematic view of the traveling carriage and the measuring carriage of the tangential force measuring apparatus which concerns on 1st Embodiment of this invention, (A) is a plan view, (B) is a side view. It is sectional drawing which shows the state cut by the VI-VI line shown in FIG. It is an enlarged view of the VII part shown in FIG. It is sectional drawing which shows the state cut by the line VIII-VIII shown in FIG. It is an enlarged view of the IX part shown in FIG. It is a schematic view of the measuring wheel of the tangential force measuring apparatus which concerns on 1st Embodiment of this invention, (A) is a plan view, (B) is a front view. It is a schematic view of the measuring carriage of the tangential force measuring apparatus which concerns on 1st Embodiment of this invention, (A) is a plan view, (B) is a side view. It is a block diagram of the tangential force measuring apparatus which concerns on 1st Embodiment of this invention. It is a top view which shows typically the attachment / detachment structure of the measuring carriage of the tangential force measuring apparatus which concerns on 1st Embodiment of this invention, and (A) shows typically the case where the measuring carriage travels in the 1st traveling direction. It is a plan view, and FIG. 3B is a plan view schematically showing a case where the measuring carriage travels in a second direction opposite to the first traveling direction. It is a schematic diagram for demonstrating the function of the inclination angle measuring part of the tangential force measuring apparatus which concerns on 1st Embodiment of this invention, and (A)-(C) typically represent the wheel of the vehicle traveling in a curved section. It is a front view which shows, (D)-(F) is an enlarged view of the XIVD-XIVF part of (A)-(C), and (G)-(I) are tangential force measuring devices traveling in a curved section. It is a front view schematically showing, and (H) is a graph which shows the relationship between the angle and the distance when traveling from a straight section toward a curved section as an example. It is an enlarged view of the XV part shown in FIG. It is a schematic diagram when the tangential force measuring apparatus which concerns on 1st Embodiment of this invention travels in a curved section with a cant, (A) is a vertical sectional view at the time of traveling in a straight section, and (B) is a curved section. It is a vertical sectional view at the time of traveling. It is a conceptual diagram which shows typically the method of using the tangential force measuring apparatus which concerns on 1st Embodiment of this invention, (A) is a plan view which shows the traveling path of the tangential force measuring apparatus schematically, (B). Is a graph showing changes in the coefficient of friction during lubrication and non-lubrication as an example. It is a graph which shows the measurement result of the friction coefficient by the tangential force measuring apparatus which concerns on 2nd Embodiment of this invention as an example. It is a top view which shows typically the tangential force measuring apparatus which concerns on 3rd Embodiment of this invention. It is a vertical cross-sectional view of the measuring carriage of the tangential force measuring apparatus which concerns on 3rd Embodiment of this invention. It is a top view which shows typically the measuring wheel of the tangential force measuring apparatus which concerns on 3rd Embodiment of this invention. It is a front view which shows typically the measuring wheel of the tangential force measuring apparatus which concerns on 3rd Embodiment of this invention. It is a block diagram of the tangential force measuring apparatus which concerns on 3rd Embodiment of this invention. It is a top view which shows typically the tangential force measuring apparatus which concerns on 4th Embodiment of this invention. It is a block diagram of the tangential force measuring apparatus which concerns on 4th Embodiment of this invention. It is a top view which shows typically the tangential force measuring apparatus which concerns on 5th Embodiment of this invention. It is a block diagram of the tangential force measuring apparatus which concerns on 5th Embodiment of this invention. It is a conceptual diagram which shows typically the measurement principle of the friction coefficient by the prior art 1, (A) is a bottom view, and (B) is a side view. It is a side view which shows typically the measurement principle of the friction coefficient by the prior art 3.

(First Embodiment)
Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings.
In the following, a case where the measurement wheel 14 of the inner rail rolls along the rail 2A on the inner rail side of the curved section shown in FIG. 1 will be described as an example.
The measurer M shown in FIG. 1 is a worker who runs the tangential force measuring device 4 while walking along the track 1. For example, as shown in FIG. 1, the measurer M walks outside the left and right rails 2A and 2B (outside the gauge) and _{moves the tangential force measuring device 4 along the left and right rails 2A and 2B in the D 1} direction (advancement). Drive in the direction).

The track 1 shown in FIGS. 1 and 2 is a passage (track) on which a vehicle travels. The track 1 runs a railroad vehicle such as a train, a railcar, a locomotive, a passenger car, or a freight car. The track 1 includes rails 2A, 2B, and the like. As shown in FIG. 2A, the line 1 is a right curve in which the direction of the line 1 changes to the right.

The rails 2A and 2B shown in FIGS. 1 and 2 are members that support and guide the wheels of the vehicle to drive the vehicle. The rails 2A and 2B shown in FIGS. 1 and 2 are arranged in pairs on the left and right at predetermined intervals, and are laid so that the gauge is 1067 mm in the case of a narrow gauge such as a conventional line. The rail 2A shown in FIGS. 1 and 2 is the inner rail of the curved section (the rail inside the curved section), and the rail 2B is the outer rail of the curved section (the rail outside the curved section). As shown in FIG. 2B, the rails 2A and 2B include a rail head portion 2a, a rail bottom portion (flange portion) 2b, a rail abdomen portion (web portion) 2c, and the like. The rail head portion 2a is a portion that comes into contact with the wheels of the vehicle. The rail head 2a includes a parietal surface (upper surface of the head) 2d that directly supports the wheels, a head side surface 2e that constitutes the left and right side surface portions of the rail head 2a and is continuous with the parietal surface 2d, and a vehicle when passing through a sharp curve. A gauge corner 2f or the like where the flange surface 3b of the wheel 3B and the side surface 2e of the head come into contact with each other is provided. The rail bottom 2b is a portion that is supported by a support such as a sleeper and is attached to the support by a rail fastening device. The rail abdomen 2c is a portion connecting the rail head portion 2a and the rail bottom portion 2b.

The wheels 3A and 3B shown in FIG. 2 are members that make rotational contact with the rails 2A and 2B. The wheels 3A shown in FIGS. 2 and 14A to 14C roll on the rail 2A on the inner rail side of the curved section, and the wheels 3B roll on the rail 2B on the outer rail side of the curved section. As shown in FIGS. 2 (B) and 14 (D) to (F), the wheels 3A and 3B have a tread surface 3a that comes into contact with the crown surface 2d of the rail head portion 2a and receives frictional resistance, and prevents derailment. A flange surface 3b or the like continuously formed on the outer peripheral portions of the wheels 3A and 3B is provided for this purpose. The axle 3C shown in FIG. 2A is a member that rotates integrally with the wheels 3A and 3B. The wheel set 3D is a member obtained by assembling the left and right wheels 3A and 3B and the axle 3C. The bogie 3E is a device that supports and travels on the vehicle body of the vehicle. The bogie 3E shown in FIG. 2A is a two-axle bogie composed of two pairs of wheel sets 3D, and is rotatably connected to the vehicle body at the center of rotation of the bogie by a towing device.

The tangential force measuring device 4 shown in FIG. 1 is a device that measures the tangential force T generated by slipping between wheels / rails. The tangential force measuring device 4 continuously measures the tangential force T while traveling along the left and right rails 2A and 2B. The tangential force measuring device 4 calculates the friction coefficient μ between the _{left and right tangential force T 1} generated between the rail 2A on the inner rail side shown in FIG. 10 and the measuring wheel 14.

Here, as shown in FIG. 10, the tangential force T is a force generated by slipping (creep) on the contact surface between the rail 2A and the measuring wheel 14 when the measuring wheel 14 rolls on the rail 2A. Is. The tangential force T is a force acting in a direction parallel to the contact surface between the rail 2A and the measuring wheel 14. The left-right tangential force T ₁ is a tangential force generated in the left-right direction of the rail 2A, and is a component of the tangential force T in the left-right direction with respect to the rail 2A. The left-right tangential force T ₁ is also referred to as left-right creep force or lateral pressure. The front-rear tangential force T ₂ is a tangential force generated in the front-rear direction of the rail 2A, and is a component of the tangential force T in the front-rear direction with respect to the rail 2A. The front-rear tangential force T ₂ is also called the front-rear creep force. The normal force (normal force) N is a force acting in a direction perpendicular to the contact surface between the rail 2A and the measuring wheel 14. The normal force N is the weight acting on the rail 2A from the tangential force measuring device 4.

The tangential force measuring device 4 shown in FIG. 1 measures the left and right tangential force T _{1 , which is larger than the front-rear tangential force T 2} shown in FIG. 10, as the tangential force T. The tangential force measuring device 4 includes the traveling trolley 5 shown in FIGS. 1 and 3 to 9, the measuring trolley 11 shown in FIGS. 1, 3, 5, 8, 9 and 11, and the measuring trolleys 11 shown in FIGS. 3, the traveling carriage 20 shown in FIGS. 6, 8 and 15, the load receiving carriage 21, the connecting portions 22A to 22C shown in FIGS. 1 and 3, the connecting portions 23A to 23D shown in FIG. 3, and FIG. The insulating portions 24A and 24B shown in FIG. 15, the manual operation unit 25 shown in FIG. 1, the tangential force calculation unit 26 shown in FIG. 12, and the rotation amount detecting unit 27 shown in FIGS. 6, 7 and 12. The mileage calculation unit 28 shown in FIG. 12, the inclination angle measurement unit 29 shown in FIGS. 3, 6 to 9, 12 and 14, the tangential force correction unit 30 shown in FIG. 12, and the friction coefficient calculation unit 31. The photographing unit 32 shown in FIGS. 5 and 12, the display unit 33 shown in FIG. 12, the data storage unit 34, the control unit 35, and the like are provided.

The traveling carriage 5 shown in FIGS. 1 and 3 to 9 is a carriage traveling along the rail 2A. The traveling carriage 5 moves along the rail 2A together with the measuring carriage 11 while supporting the measuring carriage 11. The traveling carriage 5 includes a housing portion 6 shown in FIGS. 1, 3, 5 to 9 and 11, and traveling wheels 7A and 7B shown in FIGS. 1, 3 and 5 to 7, FIG. 6 and FIG. It includes a support portion 8 shown in FIG. 7, guide wheels 9A and 9B shown in FIGS. 1 and 3 to 7, a support portion 10 shown in FIGS. 6 and 7, and the like.

The housing portion 6 shown in FIGS. 1, 3, 5, 9 and 11 is a means for accommodating the main portion of the traveling carriage 5. As shown in FIGS. 3 and 5, the housing portion 6 extends along the length direction of the rail 2A and functions as an accommodating portion for accommodating the main components constituting the traveling carriage 5. The housing portion 6 has a rectangular parallelepiped appearance and has openings at the top and bottom. As shown in FIGS. 1, 3 and 5, the housing portion 6 is a plate that connects a pair of plate-shaped side portions 6a and 6b, both ends of the side portions 6a, and both ends of the side portions 6b, respectively. It is provided with plate-shaped partition portions 6e and 6f that connect the side portions 6c and 6d and the side portions 6a and the side portions 6b so as to form a partition for accommodating the measuring carriage 11.

The traveling wheels 7A and 7B shown in FIGS. 1, 3 and 5 to 7 are wheels that allow the housing portion 6 to travel along the rail 2A. The traveling wheels 7A and 7B have the same structure, and are wheels made of synthetic resin that travel along the rail 2A. The traveling wheels 7A and 7B include a pair of left and right wheels that roll on the top surface of the head 2d, and have a double tire structure in which a pair of left and right wheels are arranged in parallel at a predetermined interval. The traveling wheels 7A and 7B have a cylindrical surface in which a pair of left and right wheels are in contact with the crown surface 2d of the rail 2A, respectively. As shown in FIGS. 1, 3 and 5, the traveling wheel 7A is arranged near one end of the traveling carriage 5, and the traveling wheel 7B is arranged near the other end of the traveling carriage 5. .. As shown in FIGS. 3 and 5, the distance between the traveling wheels 7A and 7B is set so that the measuring wheels 14 roll between the pair of left and right wheels.

The support portion 8 shown in FIGS. 6 and 7 is a means for supporting the traveling wheels 7A and 7B. The support portion 8 is fixed to the housing portion 6 of the traveling carriage 5 in a state where the rotating shafts of the traveling wheels 7A and 7B are rotatably supported. The support portion 8 supports the traveling wheels 7A and 7B so that the traveling wheels 7A and 7B can rotate in a vertical plane.

The guide wheels 9A and 9B shown in FIGS. 1 and 3 to 7 are measured while rolling along the head side surface 2e of the rail 2A so that the measurement wheel 14 rolls along a predetermined position on the crown surface 2d of the rail 2A. It is a wheel that guides the wheel 14. The guide wheels 9A and 9B have the same structure and are wheels made of synthetic resin that continuously roll along the rail 2A. As shown in FIGS. 1 and 3 to 5, the guide wheels 9A are arranged near one end of the traveling carriage 5, and the guide wheels 9B are arranged near the other end of the traveling carriage 5. .. As shown in FIGS. 1 and 3 to 5, the guide wheels 9A and 9B are spaced apart from each other in the front-rear direction of the measurement wheel 14 so as to roll along the side surface 2e of the head inside the gauge of the rail 2A. Have been placed. The guide wheels 9A and 9B have a cylindrical surface that comes into contact with the head side surface 2e of the rail 2A. As shown in FIG. 4, the guide wheels 9A and 9B have a substantially constant reaction force R acting as a pressing force (contact force) from the left and right directions of the rail 2A, so that the guide wheels 9A and 9B are in close contact with the head side surface 2e and the head side surface 2e. Roll along. The guide wheels 9A and 9B have the traveling wheels 7A and 7B and the measuring wheels 14 so that the traveling wheels 7A and 7B and the measuring wheels 14 roll at predetermined positions on the crown surface 2d without being displaced in the width direction of the crown surface 2d. Guide.

The support portion 10 shown in FIGS. 6 and 7 is a means for supporting the guide wheels 9A and 9B. The support portion 10 supports the guide wheels 9A and 9B so that the guide wheels 9A and 9B can rotate in a horizontal plane. The support portion 10 is fixed to the housing portion 6 of the traveling carriage 5 in a state where the guide wheels 9A and 9B are rotatably supported.

The measuring trolley 11 shown in FIGS. 1, 3, 5, 8, 9 and 11 is a trolley on which the measuring wheel 14 travels along the rail 2A. As shown in FIG. 9, the measuring carriage 11 travels along the rail 2A while being mounted on the traveling carriage 5. The measuring carriage 11 travels while rolling the measuring wheel 14 along the rail 2A in order to measure the left-right tangential force T _1. The measuring trolley 11 includes a housing portion 12 shown in FIGS. 3, 5, 8, 9 and 11, a mounting portion 13 shown in FIGS. 8, 9 and 11, and FIGS. 1, 3 to 5. The measuring wheel 14 shown in FIGS. 8 to 11, the support portion 15 shown in FIGS. 8 and 9, the weight portion 16 shown in FIGS. 5, 8, 9 and 11, and the weight portions 16 shown in FIGS. 5 and 11. The guide unit 17 shown, the tangential force detecting unit 18 shown in FIGS. 5, 11 and 12, the position adjusting unit 19 shown in FIGS. 5 and 11 and the like are provided.

The housing portion 12 shown in FIGS. 3, 5, 8, 9, and 11 is a means for accommodating the main portion of the measuring carriage 11. As shown in FIGS. 3 and 5, the housing portion 12 extends along the length direction of the rail 2A, and is formed to have a shorter overall length than the traveling carriage 5. The housing portion 12 functions as a housing portion for accommodating the main components constituting the measuring carriage 11, has a rectangular parallelepiped appearance, and has openings at the top and bottom. As shown in FIGS. 3 and 5, the housing portion 12 is formed by connecting a pair of plate-shaped side portions 12a and 12b, both ends of the side portions 12a, and both ends of the side portions 12b, respectively. It is provided with plate-shaped ends 12c, 12d, etc. that are joined to the partition portions 6e, 6f on the 6 side. The housing portion 12 is removable from the opening on the top side of the housing portion 12, and the outer surface of the housing portion 12 is detachably fitted with the inner surface of the housing portion 6.

The mounting portion 13 shown in FIGS. 8, 9 and 11 is a means for detachably mounting the housing portion 12 on the housing portion 6. As shown in FIG. 11, the mounting portion 13 is a plate-shaped portion attached to both ends of the measuring carriage 11 in the length direction, and is fixed to the upper ends of the side portions 12a and 12b and the end portions 12c and 12d. There is. When the measuring trolley 11 is mounted on the traveling trolley 5, the mounting portion 13 functions as a stopper for stopping the measuring trolley 11 at a predetermined height with respect to the traveling trolley 5. As shown in FIGS. 8, 9 and 11, the mounting portion 13 travels by joining the lower surface of the mounting portion 13 with the side portions 6a and 6b of the traveling carriage 5 and the upper end surfaces of the end portions 6c and 6d. The measuring carriage 11 is positioned on the carriage 5 at a predetermined position.

The measuring wheels 14 shown in FIGS. 1, 3 to 5 and 8 to 11 _{have a predetermined attack angle θ A} along the rail 2A so that a _{left-right tangential force T 1 is generated in the left-right direction of the rail 2A.} It is a wheel that rolls continuously. Here, the attack angle θ _A is, as shown in FIG. 10, the relative yaw angle between the rail 2A and the measuring wheel 14, and is the rotation angle of the measuring wheel 14 around the vertical axis. For the attack angle θ _A , for example, the center line of the rotation axis of the measurement wheel 14 shown in FIG. 10 is counterclockwise, as in the case of the wheel 3B on the outer rail side of the vehicle traveling in the curved section shown in FIG. The turning direction is positive. For the measuring wheel 14, for example, when the attack angle θ _A increases, the left-right tangential force T ₁ increases, and when the attack angle θ _A exceeds 3 °, the left-right tangential force T ₁ does not change so much, so that the attack angle θ _A is 3. It is set to °. The measuring wheel 14 is formed of carbon steel such as carbon steel for machine structure, as in the case of high carbon steel used for wheels 3A and 3B of an actual vehicle, for example. The measuring wheel 14 has a cylindrical surface that comes into contact with the crown surface 2d of the rail 2A, and is a wheel for measuring the crown surface of the rail 2A on the inner rail side. The wheel diameter of the measurement wheel 14 is set to be smaller than that of the wheels 3A and 3B of the actual vehicle so that the surface pressure is substantially the same as the surface pressure between the wheels / rails of the actual vehicle.

As shown in FIG. 13, the measuring wheels 14 are detachably mounted by changing the direction of the measuring wheels 14 so that the measurement wheels 14 rotate in the same direction during reciprocating measurement. As shown in FIG. 13 (A), the measuring wheel 14 _{travels on the rail 2A in the D 1} direction, and as shown in FIG. 13 (B), the rail 2A is in the D _{2 direction opposite to the D 1 direction.} The direction of the measuring wheel 14 is reversed by 180 ° in the case of traveling. The measuring wheel 14 is attached to and detached from the traveling carriage 5 by changing the direction by 180 ° together with the measuring carriage 11 by the manual operation of the measurer M according to the traveling direction of the measuring wheel 14.

The support portion 15 shown in FIGS. 8 and 9 is a means for supporting the measurement wheel 14. The support portion 15 is detachably fixed to the weight portion 16 of the measurement trolley 11 in a state where the rotation shaft of the measurement wheel 14 is rotatably supported. The support portion 15 supports the measuring wheel 14 so that the measuring wheel 14 can rotate in a vertical plane. The support portion 15 attaches / detaches the measuring wheels 14 of a plurality of types having different _{attack angles θ A (for example, five types of attack angles θ A} of 3 °, 2 °, 1 °, 0 °, and -3 °) to the measuring carriage 11. As possible, a plurality of types of measuring wheels 14 having different _{attack angles θ A are supported.}

The weight portion 16 shown in FIGS. 5, 8, 9 and 11 is a means for applying a load to the measuring wheel 14. The weight portion 16 applies a load to the measuring wheel 14 so that the measuring wheel 14 rolls on the parietal surface 2d while the measuring wheel 14 is in close contact with the parietal surface 2d with a substantially constant pressing force (contact force). As shown in FIG. 11, the weight portion 16 is a block body having a substantially L-shaped appearance, and is formed by processing a metal material such as a rolled steel material for general structure. In the weight portion 16, the upper surface of the support portion 15 is detachably fixed to the lower surface of the weight portion 16.

The guide portion 17 shown in FIGS. 5 and 11 is a means for movably guiding the measuring wheel 14 and the weight portion 16. The guide portion 17 allows the measuring wheel 14 and the weight portion 16 to move in the vertical direction, and restricts the movement of the measuring wheel 14 and the weight portion 16 in the horizontal direction. The guide portion 17 supports the measuring wheel 14 and the weight portion 16 so that the measuring wheel 14 and the weight portion 16 can move in the vertical direction with respect to the tangential force detecting portion 18. The guide portion 17 includes a guide rail portion 17a, a slide portion 17b, and the like. The guide portion 17 is, for example, a linear guide device in which a guide rail portion 17a and a slide portion 17b are slidably fitted and guided so that they can be displaced relative to each other.

The guide rail portion 17a is a means for reciprocating with the measuring wheel 14 and the weight portion 16. The guide rail portion 17a is fixed to the end surface of the weight portion 16 so that the measurement wheel 14 and the weight portion 16 can be reciprocated in the vertical direction together with the measuring wheel 14. The slide portion 17b is a means for being movably guided by the guide rail portion 17a. The slide portion 17b supports the guide rail portion 17a so as to be reciprocally movable in the vertical direction. The slide portion 17b is fixed to the load button 18a of the tangential force detecting portion 18.

The tangential force detecting unit 18 shown in FIGS. 5, 11 and 12 is a means for detecting the _{left and right tangential force T 1.} The tangential force detecting unit 18 is a load cell or the like that does not detect the normal force N shown in FIG. 10 but detects the left and right tangential force T ₁ , and the electric resistance changes according to the magnitude of the _{left and right tangential force T 1.} .. The tangential force detecting unit 18 includes a _{load button 18a to which the left and right tangential force T 1} shown in FIG. 10 is applied, and the electric resistance value is set according to the amount of distortion generated in the strain scheduled portion coupled to the load button 18a. It changes and outputs an electric signal (contact force detection signal) corresponding to this electric resistance value to the control unit 35. As shown in FIGS. 5 and 11, the tangential force detecting unit 18 is fixed to the slide unit 19c of the position adjusting unit 19.

The position adjusting unit 19 shown in FIGS. 5 and 11 is a means for adjusting the position of the measuring wheel 14. _{The position adjusting unit 19 adjusts the position of the measuring wheel 14 in the D 3} and D ₄ directions (rail width direction (left-right direction)) by the manual operation of the measurer M. The position adjusting unit 19 is operated by the measurer M when adjusting the contact position between the crown surface 2d and the measuring wheel 14. As shown in FIG. 11, the position adjusting unit 19 includes a rotation operation unit 19a, a guide unit 19b, a slide unit 19c, a guide unit 19d, a bearing unit 19e, and the like.

The rotation operation unit 19a shown in FIG. 11 is a means that is rotated by the measurer M. The rotation operation unit 19a is rotatable around the guide unit 19b by a manual operation by the measurer M. The rotation operation unit 19a includes a female screw portion 19f that penetrates the rotation center of the rotation operation unit 19a. The guide portion 19b is a means for movably guiding the rotation operation portion 19a in the left-right direction of the rail 2A. The guide portion 19b is a shaft-shaped member in which one end is fixed to the side portion 12a and the other end is fixed to the side portion 12b. In the guide portion 19b, a male screw portion 19g that meshes with the female screw portion 19f is formed on the outer peripheral surface of the guide portion 19b. The slide portion 19c is a means for sliding in the left-right direction of the rail 2A together with the tangential force detecting portion 18. The slide portion 19c slides in the left-right direction of the rail 2A by the manual operation of the measurer M, and moves the measurement wheel 14 in the left-right direction of the rail 2A. The slide portion 19c is provided with a through hole 19h through which the guide portion 19d penetrates. The guide portion 19d is a means for movably guiding the slide portion 19c in the left-right direction of the rail 2A. The guide portion 19d is a shaft-shaped member in which one end is fixed to the side portion 12a and the other end is fixed to the side portion 12b. The guide portion 19d is inserted into the through hole 19h of the slide portion 19c so that the slide portion 19c can slide in the left-right direction of the rail 2A along the guide portion 19d. The bearing portion 19e is a means for rotatably supporting the rotation operation portion 19a with respect to the slide portion 19c. The bearing portion 19e is sandwiched between the rotation operation portion 19a and the slide portion 19c.

The traveling carriage 20 shown in FIGS. 1, 3, 6, 8 and 15 is a carriage traveling along the rail 2B on the opposite side of the rail 2A on which the traveling carriage 5 travels. The traveling carriage 20 moves along the rail 2B together with the traveling carriage 5 and the measuring carriage 11 traveling along the rail 2A. The traveling carriage 20 includes traveling wheels 20a shown in FIGS. 1, 6, 6, 8 and 15, and support portions 20b shown in FIGS. 6, 8 and 15.

The traveling wheel 20a shown in FIGS. 1, 6, 6, 8 and 15 is a wheel that causes a guide wheel to travel along the rail 2A. The traveling wheel 20a is a wheel made of an aluminum alloy that travels along the rail 2B, and rolls on the top surface 2d of the rail 2B. The traveling wheel 20a has a cylindrical surface that comes into contact with the crown surface 2d of the rail 2A. As shown in FIG. 3, the traveling wheel 20a is arranged at a position facing the measuring wheel 14.

The support portion 20b shown in FIGS. 6, 8 and 15 is a means for supporting the traveling wheel 20a. The support portion 20b is fixed to the end of the connecting portion 22A on the side opposite to the side connected to the traveling carriage 5 in a state where the rotating shaft of the traveling wheel 20a is rotatably supported. The support portion 20b supports the traveling wheel 20a so that the traveling wheel 20a can rotate in a vertical plane.

The load receiving carriage 21 shown in FIGS. 1, 3, 6, 8 and 15 acts from the traveling carriage 5 while traveling along the rail 2B opposite to the rail 2A on which the traveling carriage 5 travels. It is a bogie that receives a load of F _0. The load receiving carriage 21 moves along the rail 2B together with the traveling carriage 20. The load receiving carriage 21 includes the slide portion 21a shown in FIGS. 1, 3, 6, 8 and 15, and the load receiving wheel 21b shown in FIGS. 1, 3, 4, 6, 8 and 15. The support portion 21c shown in FIGS. 6, 8 and 15 and the load acting portion 21d shown in FIGS. 4, 6, 8 and 15 are provided.

The slide portion 21a shown in FIGS. 1, 3, 6, 8 and 15 is a means for sliding along the connecting portion 22A. As shown in FIG. 16, the slide portion 21a slides in the D ₃ and D ₄ directions along the connecting portion 22A while supporting the load receiving carriage 21. The slide portion 21a is slidable along the length direction of the connecting portion 22A so that the load receiving wheel 21b is always in contact with the head side surface 2e of the rail 2B. The slide portion 21a is a tubular member in which the inner peripheral portion of the slide portion 21a is fitted to the outer peripheral portion of the connecting portion 22A and is slidable with the outer peripheral portion of the connecting portion 22A. The slide portion 21a is formed of an insulating material such as phenol resin so that the rail 2A and the rail 2B can be electrically insulated from each other.

The load-bearing wheels 21b shown in FIGS. 1, 3, 4, 6, 8 and 15 roll along the head side surface 2e of the rail 2B opposite to the rail 2A on which the measurement wheel 14 rolls. It is a wheel that receives _{a load F 0} acting from the left and right directions of the rail 2A. Load bearing wheels 21b, as shown in FIG. 4, under a load F ₀ acting from the left and right direction of the rail 2A, in a direction opposite to the direction of action of the load F ₀ of substantially the same size as the load F ₀ It functions as a reaction force receiver that acts on the reaction force R. Here, the load F ₀ shown in FIG. 4 is, for example, a left-right tangential force T ₁ or a normal force received by the guide wheels 9A and 9B from the side surface 2e of the head. The load receiving wheel 21b is a wheel made of synthetic resin that continuously rolls along the rail 2B, and has a cylindrical surface that comes into contact with the head side surface 2e of the rail 2B. The load receiving wheel 21b is arranged so that the center line of the load receiving wheel 21b and the center line of the traveling wheel 20a are orthogonal to each other, and is arranged so as to roll along the head side surface 2e inside the gauge of the rail 2B. ing. The load receiving wheel 21b rolls along the head side surface 2e of the rail 2B while being in close contact with the head side surface 2e of the rail 2B with a substantially constant pressing force (contact force).

The support portion 21c shown in FIGS. 6, 8 and 15 is a means for supporting the load receiving wheel 21b. The support portion 21c is fixed to the lower surface of the slide portion 21a in a state where the rotation shaft of the load receiving wheel 21b is rotatably supported. The support portion 21c supports the load receiving wheel 21b so that the load receiving wheel 21b can rotate in a horizontal plane.

The load acting portion 21d shown in FIGS. 4, 6, 8 and 15 applies a substantially constant load to the guide wheels 9A and 9B so that the guide wheels 9A and 9B are in close contact with the head side surface 2e of the rail 2A. It is a means to make it. The load acting portion 21d applies a substantially constant load to the load receiving wheel 21b so that the load receiving wheel 21b is in close contact with the head side surface 2e of the rail 2B, and the guide wheel 9A, A substantially constant load is also applied to the guide wheels 9A and 9B so that the 9Bs are in close contact with each other. The load acting portion 21d is, for example, a constant load spring that always generates a substantially constant tensile force regardless of displacement, and a spring material such as a stainless steel strip is wound with a constant curvature over the entire length. As shown in FIG. 15, the load acting portion 21d includes a spring end portion 21e that reciprocates by constantly applying a substantially constant tensile force (load), and the spring end portion 21e is attached to the end surface of the slide portion 21a. Has been done. The load acting portion 21d pulls out the spring end portion 21e and uses it, and always generates a substantially constant tensile force regardless of the pulling length. The load acting portion 21d is fixed to the lower surface of the connecting portion 22A.

As shown in FIG. 16, the load acting portion 21d so that the load receiving wheel 21b comes into close contact with the head side surface 2e of the rail 2B when the distance between the left and right rails 2A and 2B becomes wider than a predetermined width. A substantially constant load is applied to the load receiving wheel 21b. Here, the slack S shown in FIG. 16 is an amount for expanding the distance between the left and right rails 2A and 2B in the curved section. The slack S facilitates the running of the wheels 3A and 3B in the curved section by widening the distance between the rails 2A and 2B beyond a predetermined width. The load acting portion 21d springs so that the slide portion 21a slides in _{the D 4} direction when the tangential force measuring device 4 travels from the straight section shown in FIG. 16 (A) to the curved section shown in FIG. 16 (B). The end portion 21e is pulled in, and a tensile force is generated so that the load receiving wheel 21b is in close contact with the head side surface 2e of the rail 2B. On the other hand, the load acting portion 21d, when the tangential force measuring device 4 travels to the straight section shown in FIG. 16 (A) from the curve section shown in FIG. 16 (B), the D ₄ direction reverse D ₃ directions The spring end portion 21e is pulled out so that the slide portion 21a slides, and a tensile force is generated so that the load receiving wheel 21b is in close contact with the head side surface 2e of the rail 2B.

The connecting portion 22A shown in FIGS. 1, 3 to 9 and 15 is a means for connecting the traveling carriage 5 and the traveling carriage 20. As shown in FIGS. 1, 3 and 8, the connecting portion 22A is such that the traveling carriage 5 and the traveling carriage 20 travel on the rails 2A and 2B at predetermined intervals, so that the traveling carriage 5 and the traveling carriage 20 travel on the rails 2A and 2B. 20 is connected. The connecting portion 22A is a tubular member having a quadrangular cross-sectional shape, and the center line of the connecting portion 22A is arranged so as to be orthogonal to the center lines of the traveling carriage 5 and the measuring carriage 11.

The connecting portions 22B and 22C shown in FIGS. 1 and 3 are means for connecting the traveling carriage 5 and the connecting portion 22A. The connecting portions 22B and 22C function as reinforcing members for reinforcing the connecting portion 22A. The connecting portions 22B and 22C are tubular members similar to the connecting portion 22A, one end thereof is connected to the side portion 6b of the housing portion 6, and the other end portion is connected to the connecting portion 22A. There is. The connecting portions 22B and 22C are connected to the vicinity of the central portion of the connecting portion 22A so that the center line of the connecting portions 22B and 22C and the center line of the connecting portion 22A intersect at a predetermined angle. As shown in FIG. 3, the connecting portions 22B and 22C are connected to the side portion 6b of the housing portion 6 at a point-symmetrical position with respect to the connecting portion 22A. The distance between the connecting portions 22B and 22C is optimally set so that a force or moment that causes the guide wheels 9A and 9B to move away from the head side surface 2e does not act.

The connecting portion 23A shown in FIGS. 1, 3 and 9 is a means for connecting the connecting portion 22A and the housing portion 6. As shown in FIG. 9, the connecting portion 23A is fixed to the side portion 6b of the housing portion 6 with the end portion of the connecting portion 22A fixed. The connecting portions 23B and 23C shown in FIGS. 1, 3 and 7 are means for connecting the reinforcing portions 28A and 28B and the housing portion 6. Each of the connecting portions 23B and 23C has the same structure as the connecting portion 23A, and is fixed to the side portion 6b of the housing portion 6 with the end portions of the connecting portions 22B and 22C fixed as shown in FIG. There is. The connecting portion 23D shown in FIGS. 1, 6 and 8 is a means for connecting the connecting portion 22A and the connecting portions 22B and 22C. As shown in FIGS. 6 and 8, the connecting portions 23A to 23D are plate-shaped members attached to the upper and lower surfaces of the connecting portions 22A to 22C, and the connecting portions 22A to 22C are sandwiched so as to sandwich the connecting portions 22A to 22C. It is fixed by a fixing member such as a penetrating bolt.

The insulating portions 24A and 24B shown in FIGS. 3 and 15 are means for electrically insulating the rail 2A and the rail 2B. The insulating portions 24A shown in FIGS. 3 and 6 to 9 are plate-shaped members sandwiched between the connecting portions 23A to 23C and the side portions 6b of the housing portion 6. The insulating portion 24B shown in FIG. 15 is a plate-shaped member sandwiched between the support portion 20b and the connecting portion 22A. The insulating portions 24A and 24B are formed of an insulating material such as phenol resin.

The manual operation unit 25 shown in FIG. 1 is a means for the measurer M to manually push and pull the tangential force measuring device 4. The manual operation unit 25 includes a handle held by the measurer M. In the manual operation unit 25, the lower end portion of the manual operation unit 25 is rotatably connected to the end portion 6d of the housing portion 6. The manual operation unit 25 is pushed out by the measurer M when the tangential force measuring device 4 is _{driven in the D 1} direction, and is pulled by the measurer M when _{the tangential force measuring device 4 is driven in the D 2 direction.}

The tangential force calculation unit 26 shown in FIG. 12 is a means for calculating the _{left and right tangential force T 1 based on the detection result of the tangential force detection unit 18.} The tangential force calculation unit 26 includes, for example, a filter circuit that removes a noise component from the tangential force detection signal output by the tangential force detection unit 18, an amplifier circuit that amplifies the tangential force detection signal output by this filter circuit, and after amplification. It is equipped with an amplifier circuit that calculates the _{left and right tangential force T 1} based on the tangential force detection signal of. The tangential force calculation unit 26 outputs the left and right tangential force T ₁ after the calculation to the control unit 35 as tangential force data.

The rotation amount detecting unit 27 shown in FIGS. 6, 7 and 12 is a means for detecting the rotation amount of the traveling wheel 7A. The rotation amount detection unit 27 generates a pulse signal according to the rotation displacement amount of the traveling wheel 7A. The rotation amount detection unit 27 is, for example, an encoder that generates a predetermined number of pulse signals (distance pulse signals) for each rotation of the traveling wheel 7A. The rotation amount detection unit 27 is fixed to the side portion 6a of the housing portion 6 in a state where the input shaft of the rotation amount detection unit 27 and the rotation shaft of the traveling wheel 7A are connected by a joint. The rotation amount detection unit 27 outputs the rotation amount data corresponding to the rotation of the traveling wheel 7A to the control unit 35.

The mileage calculation unit 28 shown in FIG. 12 is a means for calculating the mileage of the tangential force measuring device 4 based on the detection result of the rotation amount detection unit 27. The mileage calculation unit 28 is based on the rotation amount data output by the rotation amount detection unit 27, and the mileage (movement) of the tangent force measuring device 4 from the measurement start point (starting point) at which the tangent force measuring device 4 starts measurement. Distance) is calculated. The mileage calculation unit 28 outputs the mileage after the calculation to the control unit 35 as mileage data.

The inclination angle measuring unit 29 shown in FIGS. 3, 6 to 9, 12 and 14 is a measuring wheel 14 when the measuring wheel 14 rolls along the rail 2A of the curved section to which the cant C is attached. It is a means for measuring the inclination angle θ _C. Here, the cant C shown in FIG. 14 is the height difference between the rail 2A on the inner rail side and the rail 2B on the outer rail side in the curved section of the track 1. By raising the rail 2B on the outer rail side higher than the rail 2A on the inner rail side, the cant C has running safety and ride comfort due to the excess centrifugal force acting toward the outside of the curve when the vehicle passes through the curved section. Counteract adverse effects such as. As shown in FIG. 14J, the inclination angle measuring unit 29 continuously measures _{the inclination angle θ C} of the measuring wheel 14 when the tangential force measuring device 4 passes through the curved section. The inclination angle measuring unit 29 is, for example, an inclination sensor, an acceleration sensor, a gyro sensor, or the like that detects _{the inclination angle θ C of the measuring wheel 14.} The inclination angle measuring unit 29 is fixed to the side portion 6a of the housing portion 6. The tilt angle measuring unit 29 outputs the tilt angle data corresponding to _{the tilt angle θ C of the measuring wheel 14 to the control unit 35.}

The tangential force correction unit 30 shown in FIG. 12 is a means for correcting the calculation result of the tangential force calculation unit 26 based on the measurement result of the inclination angle measurement unit 29. As shown in FIGS. 14 (G) to 14 (I), the tangential force correction unit 30 continuously changes the cant C to the left and right tangential force when the tangential force measuring device 4 passes through the circular curve and the relaxation curve. Since the _{gravity component affects T 1 , the left and right tangential force T 1} calculated by the tangential force calculation unit 26 is corrected. Here, the transition curve is a special alignment provided between a straight line and a circular curve or between two curves in order to facilitate the running of the vehicle, and the curvature, slack S and cant C are continuous. It is a curve that changes to. The tangential force correction unit 30 _{outputs the corrected left and right tangential force T 1} to the control unit 35 as corrected tangential force data.

The friction coefficient calculation unit 31 shown in FIG. 12 is a means for calculating the friction coefficient μ between the measuring wheel 14 and the rail 2A. The friction coefficient calculation unit 31 calculates the coefficient of friction (COF) μ between the measuring wheel 14 and the rail 2A based on the detection result of the tangential force detection unit 18. Here, the friction coefficient μ is a proportional coefficient (tangential force coefficient (traction coefficient)) T / N of the tangential force T with respect to the normal linear force N shown in FIG. 10, and the maximum value of the tangential force coefficient is the adhesive coefficient. is there. The friction coefficient calculation unit 31 calculates _{the value obtained by dividing the left and right tangential force T 1} shown in FIG. 10 by the normal force N (left and right tangential force coefficient) T ₁ / N as the friction coefficient μ. The friction coefficient calculation unit 31 calculates the friction coefficient μ based on the calculation result of the tangent force calculation unit 26 or the correction result of the tangent force correction unit 30, and outputs the calculated friction coefficient μ as friction coefficient data to the control unit 35. To do.

The photographing unit 32 shown in FIGS. 5 and 12 is a means for photographing the state of the rail surface on which the measuring wheel 14 rolls. The photographing unit 32 photographs the state of the rail surface in front of the measuring wheel 14 before the measuring wheel 14 passes through. The photographing unit 32 is, for example, a photographing device such as a monitor camera that captures a still image or a moving image in the state of the crown surface 2d of the rail 2A. The photographing unit 32 photographs the contact width B shown in FIGS. 14 (D) to 14 (F) and the deposit D shown in FIG. 10 (B). Here, the contact width B is the width of the portion where the rail 2A and the wheel 3A come into contact with each other on the crown surface 2d. The contact width B is, for example, a metallic luster illuminating surface on the parietal surface 2d. The deposit D is an object that adheres to the surface of the rail 2A. The deposit D is, for example, oil adhering to the rail 2A, or a film formed by fallen leaves trampled between the rail 2A and the wheel 3A. The photographing unit 32 is detachably attached to, for example, the measuring carriage 11. The photographing unit 32 outputs the photographed image to the control unit 35 as photographed image information.

The display unit 33 shown in FIG. 12 is a means for displaying a photographed image captured by the photographing unit 32. The display unit 33 is, for example, a display device such as a display or a video monitor that displays a still image or a moving image in the state of the crown surface 2d of the rail 2A. The display unit 33 is detachably attached to, for example, the measuring carriage 11. When the measurer M switches the display screen, the display unit 33 displays _{a time change of the left-right tangential force T 1} or a time change of the friction coefficient μ.

The data storage unit 34 shown in FIG. 12 is a means for storing various information regarding the tangential force measuring device 4. The data storage unit 34 stores the tangential force data, the mileage data, the inclination angle data, the corrected tangential force data, the friction coefficient data, the photographed image data, and the like, and also stores the normal force data related to the normal force N shown in FIG. Remember. The data storage unit 34 is _{a storage device that stores the left-right tangential force T 1} , the friction coefficient μ, the inclination angle θ _{C, the} captured image, and the like in correspondence with the mileage.

The control unit 35 shown in FIG. 12 is a central processing unit (CPU) that controls various operations related to the tangential force measuring device 4. For example, the control unit 35 outputs the tangent force data output by the tangent force detection unit 18 to the tangent force calculation unit 26, _{commands the tangent force calculation unit 26 to calculate the left and right tangential force T 1} , and calculates the tangential force. The tangential force data output by the unit 26 is output to the tangential force correction unit 30, the friction coefficient calculation unit 31 and the data storage unit 34, and the rotation amount data output by the rotation amount detection unit 27 is output to the mileage calculation unit 28. Alternatively, the mileage calculation unit 28 is instructed to calculate the mileage, the mileage data output by the mileage calculation unit 28 is output to the data storage unit 34, and the inclination angle data output by the inclination angle measurement unit 29 is output. and outputs the tangential force correcting unit 30 and the data storage unit 34, the tangential force correcting unit 30 or instruction to correct the lateral tangential force T _1, the tangential force correcting unit corrects the tangential force data data storage unit 34 to which 30 outputs , Command the friction coefficient calculation unit 31 to calculate the friction coefficient μ, output the friction coefficient data output by the friction coefficient calculation unit 31 to the data storage unit 34, or output the captured image output by the photographing unit 32. Data is output to the display unit 33 and the data storage unit 34, the display unit 33 is instructed to display the captured image, the data storage unit 34 is instructed to store various information, and the data storage unit 34 is normal. The force data is read out and output to the friction coefficient calculation unit 31. The control unit 35 includes a tangential force detection unit 18, a tangential force calculation unit 26, a rotation amount detection unit 27, a mileage calculation unit 28, an inclination angle measurement unit 29, a tangential force correction unit 30, a friction coefficient calculation unit 31, and a photographing unit. 32, the display unit 33, and the data storage unit 34 are connected to each other so as to be able to communicate with each other.

Next, the operation of the tangential force measuring device according to the first embodiment of the present invention will be described.
As shown in FIG. 3, with the measuring carriage 11 mounted on the traveling carriage 5, the measurer M puts the traveling wheels 7A and 7B of the traveling carriage 5 on the top surface 2d of the rail 2A, and the top of the rail 2B. The measurer M puts the traveling wheels 20a of the traveling carriage 20 on the surface 2d. At this time, the measurer M brings the guide wheels 9A and 9B of the traveling carriage 5 into close contact with the head side surface 2e of the rail 2A, and the load receiving wheel 21b of the load receiving carriage 21 is brought into close contact with the head side surface 2e of the rail 2B. Adhere. As shown in FIGS. 1 and 3, since the traveling wheels 7A and 7B and the traveling wheels 20a support the tangential force measuring device 4 at three points on the rails 2A and 2B, the posture of the tangential force measuring device 4 is the rail 2A, It is supported horizontally with respect to 2B.

When the measurer M rotates the rotation operation unit 19a shown in FIG. 11, the rotation operation unit 19a rotates while the female screw portion 19f of the rotation operation unit 19a meshes with the male screw portion 19g of the guide portion 19b. Since the bearing portion 19e is sandwiched between the slide portion 19c and the rotation operation portion 19a, the rotation operation portion 19a rotates along the guide portion 19b while the rotation operation portion 19a rotates with respect to the slide portion 19c. Slide in the ₃ and D _{4 directions.} At this time, since the bearing portion 19e is fixed between the slide portion 19c and the rotation operation portion 19a, the slide portion 19c is integrated with the rotation operation portion 19a and guided by the guide portion 19d while D ₃ and D ₄ Slide in the direction.

The load button 18a of the tangential force detection unit 18 is fixed to the slide portion 17b, and the guide rail portion 17a is fitted with the slide portion 17b. Therefore, when the slide portion 19c slides in the D ₃ and D ₄ directions, the tangential force detecting portion 18 and the guide portion 17 also slide in the _{D 3} and D _{4 directions together with the slide portion 19c.} As a result, the weight portion 16, the support portion 15, and the measuring wheel 14 also _{slide in the D 3} and D ₄ directions together with the guide portion 17, and as shown in FIG. 10, a predetermined position on the crown surface 2d of the rail 2A. The measuring wheel 14 is positioned.

As shown in FIGS. 14 (D) to 14 (F), when the wheel 3A of the vehicle rolls in a curved section, the position of the contact width B changes in a straight line, a transition curve, and a circular curve. When the tangential force measuring device 4 for measuring the lateral tangential force T ₁ of the rail 2A of curved section, as the contact width B is measured wheel 14 rolls, measuring wheel measurer M operates the position adjustment portion 19 The position of 14 is adjusted.

As shown in FIG. 1, while the measurer M walks along the track 1, the measurer M manually pushes the tangential force measuring device 4 along the rails 2A and 2B by the manual operation unit 25. As shown in FIG. 10A, since the measuring wheel 14 is provided with the attack angle θ _A , the measuring wheel 14 rolls continuously while skidding on the parietal surface 2d, and the parietal surface 2d and the measuring wheel 14 Left and right tangential force T ₁ is generated between. For example, as shown in FIG. 10B, when the deposit D adheres to the crown surface 2d of the rail 2A, the measuring wheel 14 rolls continuously on the surface of the deposit D while skidding. Therefore, the measurement wheel 14 does not roll while scraping the deposit D, and the left and right tangential force T ₁ is generated between the rail 2A and the measurement wheel 14 with the deposit D interposed therebetween.

As shown in FIG. 11, the guide rail portion 17a cannot slide in the left-right direction with respect to the slide portion 17b. Therefore, the left and right tangential force T ₁ acting on the measuring wheel 14 acts on the load button 18a of the tangential force detecting unit 18 through the weight portion 16 and the guide portion 17, and the tangential force detecting unit 18 detects the left and right tangential force T ₁ . To do. On the other hand, the guide rail portion 17a is slidable in the vertical direction with respect to the slide portion 17b. Therefore, the normal force N shown in FIG. 10 does not act on the load button 18a of the tangential force detecting unit 18, and the tangential force detecting unit 18 does not detect the normal force N. When the measuring wheel 14 rolls on the rail 2A, the measuring wheel 14 may vibrate due to the unevenness of the crown surface 2d to generate an impact force. Since the measuring wheel 14 slides vertically with respect to the slide portion 17b together with the guide rail portion 17a, no impact force acts on the load button 18a of the tangential force detecting portion 18.

_{As shown in FIG. 4, when the traveling carriage 5 and the measuring carriage 11 travel along the rail 2A, the load F 0} is transmitted from the traveling carriage 5 toward the load receiving carriage 21 through the connecting portion 22A from the left and right directions of the rail 2A. .. Since the load receiving wheel 21b is in close contact with the head side surface 2e of the rail 2B due to the tensile force of the load acting portion 21d, the load receiving wheel 21b receives the _{load F 0 transmitted from the left and right directions of the rail 2A. When the load F 0} transmitted from the left-right direction of the rail 2A acts on the load receiving wheel 21b, the reaction force (normal force) R received by the load receiving wheel 21b from the side surface 2e of the head is transmitted to the guide wheels 9A and 9B, and the head of the rail 2A. The guide wheels 9A and 9B are brought into close contact with the side surface 2e by the reaction force R. As a result, since the guide wheels 9A and 9B and the load receiving wheels 21b roll in close contact with the head side surface 2e, the traveling carriage 5 and the measuring carriage 11 do not deviate from the rail 2A, and the traveling wheels 7A and 7B and the measuring wheels are not deviated from the rail 2A. 14 is prevented from derailing from rail 2A.

As shown in FIG. 16, _{when measuring the left-right tangential force T 1} in the curved section with the cant C, even if the distance between the left and right rails 2A and 2B changes, the load action follows the slack S. The spring end portion 12e of the portion 21d expands and contracts. Therefore, the load receiving wheel 21b is always in close contact with the head side surface 2e of the rail 2B due to the tensile force of the load acting portion 21d, and a substantially constant reaction force R is always applied from the load receiving wheel 21b toward the guide wheels 9A and 9B. It works. As a result, the guide wheels 9A and 9B are always in close contact with the head side surface 2e of the rail 2A due to the substantially constant reaction force R acting from the load receiving wheel 21b.

As shown in FIG. 17 (A), when the measurer M moves the tangential force measuring device 4 along the line 1, the friction coefficient μ is continuously increased by the tangential force measuring device 4 as shown in FIG. 17 (B). Is measured. The rail lubricator L shown in FIG. 17A is a device for applying a lubricant to the rails 2A and 2B. The rail lubricator L applies a lubricant such as grease to the rail 2A, for example, when suppressing sharp curve rail wear or when reducing squeak noise. The rail lubricator L is installed on the ground side and applies a lubricant when passing through the wheel 3A. For example, as shown in FIG. 17B, the friction coefficient μ is returned by the rail lubricator L during lubrication, and the friction coefficient μ gradually increases until the next rail lubricator L is reached. The distribution of the friction coefficient μ is measured by the tangential force measuring device 4 so that the friction coefficient μ is returned again by the rail lubricator L.

When the tangential force measuring device 4 shown in FIG. 17 is _{run in the D 1} direction and then the tangential force measuring device 4 is _{run in the reverse direction in the D 2} direction to perform reciprocating measurement, the measuring wheel 14 is used on the outward route and the return route. Since the directions of rotation of the two are different, an error may occur in the measurement result of _{the left and right tangential force T 1.} In this case, the measuring trolley M removes the measuring trolley 11 from the traveling trolley 5, the measuring trolley M reverses the direction of the measuring trolley 11, and then the measuring trolley M attaches the measuring trolley 11 to the traveling trolley 5. Therefore, the rotation direction of the measurement wheel 14 is always the same on the outward path and the return path, and the error that occurs in the measurement result of the _{left-right tangential force T 1 is reduced.}

The tangential force measuring device according to the first embodiment of the present invention has the effects described below.
(1) In the first embodiment, as the left and right tangential force T ₁ in the lateral direction of the rail 2A occurs, rolling measuring wheel 14 is continuously at a predetermined attack angle theta _A along the rails 2A, the left and right tangents The tangential force detecting unit 18 detects the force T _1. Therefore, by intentionally setting the attack angle θ _A on the measuring wheel 14, the left-right tangential force T ₁ generated when the measuring wheel 14 rolls can be continuously measured. As a result, the tangential force measuring device 4 can be made into a simple structure, and the weight of the tangential force measuring device 4 can be reduced.

(2) In this first embodiment, the guide wheels 9A and 9B roll along the head side surface 2e of the rail 2A so that the measurement wheel 14 rolls along the predetermined position of the crown surface 2d of the rail 2A. Guide 14 Further, in the first embodiment, the load acting portion 21d applies a substantially constant load to the guide wheels 9A and 9B so that the guide wheels 9A and 9B are in close contact with the head side surface 2e of the rail 2A. Therefore, it is possible to prevent the guide wheels 9A and 9B from deviating from the rail 2A. Further, it is possible to prevent the guide wheels 9A and 9B from being lifted from the head side surface 2e of the rail 2A and the contact position between the measuring wheel 14 and the crown surface 2d being displaced.

(3) In this first embodiment, the load receiving wheel 21b rolls along the head side surface 2e of the rail 2B opposite to the rail 2A on which the measurement wheel 14 rolls, and the measurement wheel 14 rolls in the left-right direction of the rail 2A. The load receiving wheel 21b receives _{the load F 0} acting from the above. Further, in the first embodiment, the load acting portion 21d applies a substantially constant load to the load receiving wheel 21b so that the load receiving wheel 21b is in close contact with the head side surface 2e of the rail 2B on the opposite side. Therefore, it is possible to prevent the load receiving wheel 21b from floating from the head side surface 2e of the rail 2B, and it is possible to prevent the load receiving wheel 21b from deviating from the rail 2B.

(4) In this first embodiment, when the distance between the left and right rails 2A and 2B becomes wide, the load receiving wheel 21b comes into close contact with the head side surface 2e of the opposite rail 2B. The load acting unit 21d applies a substantially constant load to 21b. Therefore, it is possible to prevent the tangential force measuring device 4 from deviating from the rails 2A and 2B when measuring the _{left and right tangential force T 1} in the curved section to which the slack S is attached. Further, since the load receiving wheel 21b is always in close contact with the head side surface 2e of the rail 2B, the load F ₀ acting from the left-right direction of the rail 2A can be received by the load receiving wheel 21b. Further, the guide wheels 9A and 9B can always be brought into close contact with the head side surface 2e of the rail 2A by a substantially constant reaction force R acting on the load receiving wheel 21b from the head side surface 2e of the rail 2B.

(5) In this first embodiment, the measuring wheel 14 rolls along the rail 2A on the inner rail side of the curved section, and the tangential force detecting unit 18 detects _{the left and right tangential force T 1 of the rail 2A on the inner rail side.} Therefore, the friction coefficient μ of the rail 2A on the inner rail side, which is an important factor when determining whether the wheel 3B can smoothly roll on the rail 2B on the outer rail side of the curved section, can be easily measured. ..

(6) In this first embodiment, the friction coefficient calculation unit 31 calculates the friction coefficient μ between the measurement wheel 14 and the rail 2A based on the detection result of the tangential force detection unit 18. Therefore, the coefficient of friction μ between the rail and the wheel during rolling can be continuously measured and evaluated in detail. Further, for example, the time change of the friction coefficient μ, the width of the time change of the friction coefficient μ, the amplitude of the time change of the friction coefficient μ, and the time change of the friction coefficient μ are processed by the filter circuit to process the time of the median value of the friction coefficient μ. Changes can be evaluated. Further, it is possible to compare the friction coefficient μ when the deposit D is present and the friction coefficient μ when the deposit D is not present.

(7) In the first embodiment, when the measuring wheel 14 rolls along the rail 2A of the curved section to which the cant C is attached, the tilt angle measuring unit 29 measures _{the tilt angle θ C of the measuring wheel 14.} .. Thus, by measuring the cant C of curved section comprising an error factor of the left and right tangential force T _1, the measurement result correction to lateral tangential force T ₁ measured at curved section, the measurement accuracy of the lateral tangential force T ₁ Can be improved.

(8) In the first embodiment, the photographing unit 32 photographs the state of the rail surface on which the measuring wheel 14 rolls, and the display unit 33 displays the photographed image captured by the photographing unit 32. Therefore, it is possible to accurately record the state of the illuminating surface at the contact width B of the parietal surface 2d for which the left-right tangential force T _{1 is being measured.} In addition, the measurer M can easily visually confirm the influence of the deposit D such as oil and fallen leaves adhering to the parietal surface 2d.

(9) In this first embodiment, the measurement wheels 14 are detachably mounted by changing the direction of the measurement wheels 14 so that the measurement wheels 14 rotate in the same direction during the reciprocating measurement. Therefore, by structuring the measuring wheel 14 that constitutes the measuring portion of the left and right tangential force T _{1, the measuring wheel 14 can be easily removed and inverted.} As a result, it is possible to reduce the measurement error that occurs _{in the left and right tangential force T 1} on the outward path and the return path during the reciprocating measurement caused by the asymmetry of the measurement structure of the measurement wheel 14. Further, the measuring wheel 14 can be easily cleaned or inspected by removing the measuring carriage 11 from the traveling carriage 5.

(Second Embodiment)
In the following, the same parts as those shown in FIGS. 1 to 17 are designated by the same reference numerals and detailed description thereof will be omitted.
The tangential force detecting unit 18 is, for example, a dichotomous force load cell that simultaneously detects the _{left and right tangential force T 1} and the front-rear tangential force T _2. The friction coefficient calculation unit 31 _{divides the left-right tangent force T 1} by the normal force N (left-right tangent force coefficient) T ₁ / N and the front-rear tangent force T ₂ divided by the normal force N (front-rear tangent line). The force coefficient) T ₂ / N and the value obtained by dividing the tangential force T by the normal force N (tangential force coefficient) T / N are calculated as the friction coefficient μ. The friction coefficient calculation unit 31 calculates, for example, the time change of the left-right tangential force coefficient and the front-rear tangential force coefficient as shown in FIG. Here, the vertical axis shown in FIG. 18 is the tangential force coefficient (friction coefficient), and the horizontal axis is the mileage.

The tangential force measuring device according to the second embodiment has the following effects in addition to the effects of the first embodiment.
In this second embodiment, the left-right tangential force T ₁ is detected by the tangential force detecting unit 18, and the front-rear tangential force T ₂ generated in the front-rear direction of the rail 2A is detected by the tangential force detecting unit 18. Therefore, the tangential force T, _{which is the resultant force of the left-right tangential force T 1} and the front-rear tangential force T ₂ , can be detected, and the friction coefficient μ can be measured with high accuracy based on the tangential force T.

(Third Embodiment)
In the following, when the measuring wheel 14 of the inner rail rolls along the rail 2A on the inner rail side of the curved section shown in FIG. 19, and the measuring wheel 38 of the outer rail rolls along the rail 2B on the outer rail side of this curved section. Will be described as an example.
The tangential force measuring device 4 shown in FIG. 19 continuously measures the _{left and right tangential force T 1} generated between the rail 2A and the measuring wheel 14 while traveling along the left and right rails 2A and 2B, and the rails. The lateral pressure Q generated between 2B and the measuring wheel 38 is continuously measured. Tangential force measurement device 4 serves to measure μ friction coefficient between them by measuring the lateral tangential force T ₁ generated between the rails 2A and the measuring wheel 14 of rail side inner shown in FIG. 10, FIG. By measuring the lateral pressure Q generated between the rail 2B on the outer rail side shown in 21 and the measuring wheel 38, the coefficient of friction μ between them is measured.

Here, as shown in FIG. 22, the lateral pressure Q is orthogonal to the _{axial direction (normal force N and left-right tangential force T 1)} of the measuring wheel 38 among the forces acting between the rail 2B and the measuring wheel 38. It is a force acting in the direction of the wheel. The lateral pressure Q is usually positive in the direction in which the measuring wheel 38 is pushed from the rail 2B. The lateral pressure Q is a force obtained by projecting the resultant force F of the normal force N and the left and right tangential force T ₁ in the left-right direction in a plane perpendicular to the length direction of the rail 2B. The wheel load P is a component force of a vertical component in a plane perpendicular to the length direction of the rail 2A among the forces acting between the rail 2A and the measuring wheel 14. The wheel load P is a force obtained by projecting the resultant force F of the normal force N and the left and right tangential force T ₁ in the vertical direction in a plane perpendicular to the length direction of the rail 2B. The tangential force measuring device 4 shown in FIG. 19 is different from the tangential force measuring device 4 shown in FIGS. 3, 4 and 12, the measuring carriage 36 shown in FIGS. 19 and 20 and the lateral force measuring device 4 shown in FIGS. 20 and 23. It includes a pressure detection unit 41, a lateral pressure calculation unit 42, and the like.

The load receiving carriage 21 shown in FIG. 19 has substantially the same structure as the load receiving carriage 21 shown in FIGS. 3 and 4, and includes load receiving wheels 21f and 21g having the same structure as the load receiving wheels 21b. The load receiving wheels 21f and 21g are arranged at equal intervals in front of and behind the measuring wheel 38 so as not to interfere with the measuring wheel 38. Similar to the load-bearing wheels 21b shown in FIGS. 6, 8 and 15, the load-bearing wheels 21f and 21g act on a load so as to be in close contact with the head side surface 2e of the rail 2B while being supported by the support portion 21c. A substantially constant load is acting from the portion 21d.

The friction coefficient calculation unit 31 shown in FIG. 23 is a means for calculating the friction coefficient μ between the measuring wheel 38 and the rail 2B. The friction coefficient calculation unit 31 calculates the friction coefficient μ between the measurement wheel 38 and the rail 2B shown in FIG. 22 based on the detection result of the lateral pressure detection unit 41. The friction coefficient calculation unit 31 calculates the normal force (normal force) N and the tangential force (friction force) T shown in Equation 1 below, and divides the tangent force T by the normal force N (left and right tangential force). Factor) T / N is calculated as the friction coefficient μ.

The friction coefficient calculation unit 31 calculates the friction coefficient μ based on the calculation result of the lateral pressure calculation unit 42 or the correction result of the lateral pressure correction unit 43, and outputs the calculated friction coefficient μ as friction coefficient data to the control unit 35. To do.

The data storage unit 34 shown in FIG. 23 stores lateral pressure data, corrected lateral pressure data, friction coefficient data, and the like, and also stores wheel load data related to the wheel load P shown in FIG. The data storage unit 34 stores the lateral pressure Q, the friction coefficient μ, the inclination angle θ _{C, the} captured image, and the like in correspondence with the mileage.

The control unit 35 shown in FIG. 23 outputs, for example, the lateral pressure data output by the lateral pressure detection unit 41 to the lateral pressure calculation unit 42, commands the lateral pressure calculation unit 42 to calculate the lateral pressure Q, or laterally. The lateral pressure data output by the pressure calculation unit 42 is output to the lateral pressure correction unit 43, the friction coefficient calculation unit 31 and the data storage unit 34, and the inclination angle data output by the inclination angle measurement unit 29 is output to the lateral pressure correction unit 43. Output, command the lateral pressure correction unit 43 to correct the lateral pressure Q, output the corrected lateral pressure data output by the lateral pressure correction unit 43 to the data storage unit 34, and the wheel load data from the data storage unit 34. Is read out and output to the friction coefficient calculation unit 31. The lateral pressure detection unit 41, the lateral pressure calculation unit 42, the lateral pressure correction unit 43, the friction coefficient calculation unit 31, and the like are connected to the control unit 35 so as to be able to communicate with each other.

The measuring trolley 36 shown in FIGS. 19 and 20 is a trolley in which the measuring wheel 38 travels along the rail 2B. The measuring carriage 36 travels while rolling the measuring wheels 38 along the rail 2B in order to measure the lateral pressure Q. The measuring trolley 36 includes a housing portion 37 shown in FIG. 20, measuring wheels 38 shown in FIGS. 19 to 21, support portions 39A and 39B shown in FIG. 20, guide portions 40A and 40B, and the like.

The housing portion 37 shown in FIG. 20 is a means for accommodating the main portion of the measuring carriage 36. As shown in FIG. 19, the housing portion 37 is formed to have a shorter overall length than the traveling carriage 5. As shown in FIGS. 19 and 20, the housing portion 37 has a rectangular parallelepiped appearance and functions as an accommodating portion for accommodating the main components constituting the measuring carriage 36. As shown in FIG. 20, the housing portion 37 includes a pair of plate-shaped side portions 37a and 37b, a plate-shaped top portion 37c that connects the upper end portion of the side portion 37a and the upper end portion of the side portion 37b, and the like. I have. The housing portion 37 is supported by the support portion 21c shown in FIG.

The measuring wheels 38 shown in FIGS. 19 to 22 are wheels that roll along the gauge corner 2f of the rail 2B so that the lateral pressure Q is generated in the left-right direction of the rail 2B. The measuring wheel 38 is formed of carbon steel such as carbon steel for machine structure, as in the case of high carbon steel used for the wheels 3A and 3B of an actual vehicle, for example. The measuring wheel 38 is formed in a truncated cone shape in appearance, and has a conical surface in contact with the gauge corner 2f. The measuring wheel 38 is a gauge corner measuring wheel of the rail 2B on the outer rail side. Measurement wheel 38, as shown in FIG. 22, the slope of the conical surface of the measuring wheel 38 (wheel tread gradient) is formed on the slope angle theta _alpha. Here, the slope angle theta _alpha, is the angle between the side surface and the conical surface of the measuring wheel 38. A substantially constant load is applied to the measuring wheel 38 by the load acting portion 21d shown in FIG. 19 so as to be in close contact with the gauge corner 2f of the rail 2B.

The support portion 39A shown in FIG. 20 is a means for supporting the measurement wheel 38. The support portion 39A includes a bearing that rotatably supports the rotation axis of the measurement wheel 38 so that the rotation axis of the measurement wheel 38 can slide in the center line direction. The support portion 39A supports the measuring wheel 38 so that the measuring wheel 38 can rotate in a vertical plane. The support portion 39B is a means for supporting the support portion 39A. The support portion 39B movably supports the support portion 39A together with the measurement wheels 38 in the left-right direction of the rail 2B. The support portion 39B is supported by the housing portion 37 so as to be movable in the vertical direction of the rail 2B while supporting the support portion 39A.

The guide portion 40A is a means for movably guiding the support portion 39A, and the guide portion 40B is a means for movably guiding the support portion 39B. The guide portion 40A is arranged between the support portion 39A and the support portion 39B, and the guide portion 40B is arranged between the housing portion 37 and the support portion 39B. The guide portion 40A allows the support portion 39A to move in the left-right direction and restricts the movement of the support portion 39A in the vertical direction. The guide portion 40B allows the support portion 39B to move in the vertical direction and restricts the movement of the support portion 39B in the horizontal direction. The guide portions 40A and 40B are linear guide devices having the same structure as the guide portions 17 shown in FIGS. 5 and 11, and include a guide rail portion 40a, a slide portion 40b, and the like.

The lateral pressure detecting unit 41 shown in FIGS. 20 and 23 is a means for detecting the lateral pressure Q. The lateral pressure detecting unit 41 is a load cell or the like that does not detect the wheel load P shown in FIG. 22 but detects the lateral pressure Q, and the electric resistance changes according to the magnitude of the lateral pressure Q. The lateral pressure detecting unit 41 includes a load button 41a or the like to which a lateral pressure Q is applied, and the electric resistance value changes according to the amount of distortion generated in the expected distortion portion coupled to the load button 41a, and this electric resistance. An electric signal (lateral pressure detection signal) corresponding to the value is output to the control unit 35. As shown in FIG. 20, the lateral pressure detecting portion 41 is fixed to the supporting portion 39B so that the end of the rotating shaft of the measuring wheel 38 comes into contact with the load button 41a.

The lateral pressure calculation unit 42 shown in FIG. 23 is a means for calculating the lateral pressure Q based on the detection result of the lateral pressure detection unit 41. The lateral pressure calculation unit 42 includes, for example, a filter circuit that removes a noise component from the lateral pressure detection signal output by the lateral pressure detection unit 41, an amplifier circuit that amplifies the lateral pressure detection signal output by this filter circuit, and after amplification. It is provided with an arithmetic circuit that calculates the lateral pressure Q based on the lateral pressure detection signal of. The lateral pressure calculation unit 42 outputs the calculated lateral pressure Q as lateral pressure data to the control unit 35.

The lateral pressure correction unit 43 is a means for correcting the calculation result of the lateral pressure calculation unit 42 based on the measurement result of the inclination angle measurement unit 29. As shown in FIGS. 14 (G) to 14 (I), the lateral pressure correction unit 43 continuously changes the cant C to the lateral pressure Q when the tangential force measuring device 4 passes through the circular curve and the relaxation curve. Since the gravity component affects the lateral pressure Q, the lateral pressure Q calculated by the lateral pressure calculation unit 42 is corrected. The lateral pressure correction unit 43 outputs the corrected lateral pressure Q to the control unit 35 as corrected lateral pressure data.

Next, the operation of the tangential force measuring device according to the third embodiment of the present invention will be described.
As shown in FIG. 2A, when the vehicle passes through the curved section, the gauge corner 2f of the rail 2B on the outer rail side and the flange surface 3b of the wheel 3B come into contact with each other as shown in FIG. 2B. Lateral pressure Q is generated. Therefore, it causes a squeaking noise (fricative noise) when the wheels 3A and 3B roll on the curved section, and also causes wavy wear generated on the crown surface 2d of the rail 2A on the inner rail side. In order to reduce such excessive lateral pressure Q and wavy wear, it is necessary to reduce the friction coefficient μ of the rail 2B on the outer rail side. In order to reduce the friction coefficient μ of the rail 2B on the outer rail side, it is necessary to allow the wheels 3A and 3B to smoothly pass along the rails 2A and 2B by reducing the friction coefficient of the rail 2A on the inner rail side. is there. Therefore, it is important to grasp the friction coefficient μ of the rails 2A and 2B of the inner and outer rails.

As shown in FIG. 19, with the measuring carriage 11 mounted on the traveling carriage 5, the measurer M puts the traveling wheels 7A and 7B of the traveling carriage 5 on the top surface 2d of the rail 2A, and the gauge of the rail 2B is placed. The measurer M puts the measurement wheel 38 of the measurement bogie 36 on the corner 2f. When the tangential force measuring device 4 travels along the track 1, the measuring wheels 38 continuously roll along the gauge corner 2f of the rail 2B, and the lateral pressure Q shown in FIGS. 21 and 22 is generated. As shown in FIG. 20, the support portion 39A can slide in the left-right direction together with the measurement wheel 38 by the guide portion 40A with respect to the housing portion 37 and the support portion 39B. Therefore, the measuring wheel 38 rolls following the gauge corner 2f while the measuring wheel 38 receives a substantially constant pressing force from the load acting portion 21d, and the lateral pressure Q acts on the measuring wheel 38. As a result, the lateral pressure Q acting on the measuring wheel 38 acts on the load button 41a of the lateral pressure detecting unit 41 through the rotation axis of the measuring wheel 38, and the lateral pressure detecting unit 41 detects the lateral pressure Q. On the other hand, the support portion 39B can slide in the vertical direction with respect to the housing portion 37 by the guide portion 40B together with the support portion 39A and the measurement wheel 38. Therefore, the wheel load P shown in FIG. 22 does not act on the load button 41a of the lateral pressure detecting unit 41, and the lateral pressure detecting unit 41 does not detect the wheel load P.

In addition to the effects of the first embodiment and the second embodiment, the third embodiment has the following effects.
(1) In the third embodiment, the measuring wheel 14 rolls along the rail 2A on the inner rail side of the curved section, and the tangential force detecting unit 18 detects _{the left and right tangential force T 1 of the rail 2A on the inner rail side.} Further, in the third embodiment, the measurement wheel of the outer rail is formed along the gauge corner 2f of the rail 2B on the outer rail side so that the lateral pressure Q is generated in the left-right direction of the rail 2B on the outer rail side of the curved section. 38 rolls, and the lateral pressure detecting unit 41 detects the lateral pressure Q. Therefore, the tangential force T of the rail 2A on the inner rail side and the lateral pressure Q of the rail 2B on the outer rail side can be continuously measured, and the friction coefficient μ of the rails 2A and 2B of the inner and outer rails can be measured at the same time. can do.

(2) In the third embodiment, the friction coefficient calculation unit 31 calculates the friction coefficient μ between the measurement wheel 38 and the rail 2B based on the detection result of the lateral pressure detection unit 41. Therefore, the friction coefficient μ of the rail 2B on the outer rail side of the curved section can be continuously measured and evaluated in detail.

(Fourth Embodiment)
In the following, a case where the measuring wheels 14A and 14B roll along the rails 2A and 2B in the straight section or the curved section shown in FIG. 24 will be described as an example.
The tangential force measuring device 4 shown in FIG. 24 continuously measures the _{left and right tangential force T 1} generated between the rail 2A and the measuring wheel 14A while traveling along the left and right rails 2A and 2B, and the rail. _{The left and right tangential force T 1} generated between 2B and the measuring wheel 14B is continuously measured. Tangential force measurement device 4 measures the μ friction coefficient between them by measuring rail 2A, 2B and measuring wheel 14A, the left and right tangential force T ₁ generated between the 14B. The tangential force measuring device 4 shown in FIG. 24 is different from the tangential force measuring device 4 shown in FIGS. 3, 4 and 12, and the traveling carriages 5A and 5B shown in FIG. 26, the measuring carriages 11A and 11B, and FIG. 25 The tangential force detection units 18A and 18B shown in the above are provided.

The traveling carriages 5A and 5B shown in FIG. 24 have the same structure as the traveling carriages 5 shown in FIGS. 1 and 3 to 9, the traveling carriage 5A traveling along the rail 2A, and the traveling carriage 5B along the rail 2B. And run. In the traveling carriage 5B, the housing portion 6 of the traveling carriage 5B is supported by the support portions 21c shown in FIGS. 8, 15 and 20.

The measuring trolleys 11A and 11B shown in FIG. 24 have the same structure as the measuring trolleys 11 shown in FIGS. 1, 3, 5, 8, 9 and 11, and the measuring trolley 11A has measuring wheels along the rail 2A. 14A is run, and the measuring carriage 11B runs the measuring wheel 14B along the rail 2B. The measuring carriages 11A and 11B travel while rolling the measuring wheels 14A and 14B along the rails 2A and 2B in order to measure the _{left and right tangential force T 1, respectively.} A substantially constant load is applied to the measuring carriage 11B by the load acting portion 21d. The measuring trolleys 11A and 11B include measuring wheels 14A and 14B having the same structure as the measuring wheels 14 shown in FIGS. 1, 3 to 5 and 8 to 11. Measuring wheels 14A, 14B shown in FIG. 24, rails 2A, as the left and right tangential force T ₁ is generated in the lateral direction of 2B, rails 2A, roll continuously at a predetermined attack angle theta _A along 2B.

The tangential force detecting units 18A and 18B shown in FIG. 25 are means for detecting the _{left and right tangential force T 1.} The tangential force detection units 18A and 18B have the same structure as the tangential force detection unit 18 shown in FIG. 12, the tangential force detection unit 18A detects the left and right tangential force T ₁ of the rail 2A, and the tangential force detection unit 18B is the rail 2B. Detects the left and right tangential force T _1. The tangential force calculation unit 26 shown in FIG. 25 calculates the left and right tangential force T ₁ based on the detection results of the tangential force detection units 18A and 18B.

The tangential force measuring device according to the fourth embodiment of the present invention has the following effects in addition to the effects of the first embodiment and the second embodiment.
(1) In the fourth embodiment, the measurement wheel 14A on the right side rolls along the rail 2A on the right side of the straight section, and the measurement wheel 14B on the left side rolls along the rail 2B on the left side of the straight section. Further, in the fourth embodiment, the left and right tangential force T ₁ of the right rail 2A is detected by the right tangential force detecting unit 18A, and the left and right tangential force T ₁ of the left rail 2B is detected by the left tangential force detecting unit 18B. To detect. Therefore, the tangential forces T of the left and right rails 2A and 2B in the straight section can be continuously measured, and the friction coefficient μ of the left and right rails 2A and 2B can be measured at the same time.

(2) In the fourth embodiment, the inner rail measuring wheel 14A rolls along the rail 2A on the inner rail side of the curved section, and the outer rail measuring wheel 14B is rolled along the rail 2B on the outer rail side of this curved section. Rolls. Further, in the fourth embodiment, the left and right tangential force T ₁ of the rail 2A on the inner rail side is detected by the tangential force detection unit 18A of the inner rail, and the left and right tangential force T ₂ of the rail 2B on the outer rail side is detected by the outer rail. The tangential force detection unit 18B detects it. Therefore, the tangential force T of the inner and outer rails 2A and 2B in the curved section can be continuously measured, and the friction coefficient μ of the inner and outer rails 2A and 2B can be measured at the same time.

(Fifth Embodiment)
In the following, when the measuring wheel 14 of the inner rail rolls along the rail 2A on the inner rail side of the curved section shown in FIG. 26, and the measuring wheel 38 of the outer rail rolls along the rail 2B on the outer rail side of this curved section. Will be described as an example.
_{The tangential force measuring device 4 shown in FIG. 26 has left and right tangential force T 1} generated between the rail 2A and the measuring wheel 14A while traveling along the left and right rails 2A and 2B, and the rail 2B and the measuring wheel 14B. The left and right tangential force T ₁ generated between the two is continuously measured, and the lateral pressure Q generated in the left and right direction of the rail 2B is continuously measured. Tangential force measurement device 4, the rails 2A, 2B and measuring wheel 14A, as well as measure μ friction coefficient between them by measuring the lateral tangential force T ₁ generated between the 14B, the left-right direction of the rail 2B The coefficient of friction μ between the rail 2B and the measuring wheel 38 is measured by measuring the lateral pressure Q generated in. The tangential force measuring device 4 shown in FIG. 26 is different from the tangential force measuring device 4 shown in FIGS. 3, 4 and 12, and the traveling carriages 5A and 5B shown in FIG. 26, the measuring carriages 11A and 11B, and FIG. 27. The tangential force detecting units 18A and 18B shown in FIG. 26, the measuring carriage 36 shown in FIG. 26, the lateral pressure detecting unit 41 shown in FIG. 27, and the like are provided.

Next, the operation of the tangential force measuring device according to the fifth embodiment of the present invention will be described.
As shown in FIG. 2A, when the vehicle passes through the curved section, the flange surface 3b of the wheel 3B of the wheel set 3D on the front side (front shaft) of the bogie 3E in the traveling direction is the gauge corner of the rail 2B on the outer rail side. It comes into contact with 2f, and the tread surface 3a of the wheel 3B of the wheel set 3D on the rear side (rear shaft) of the bogie 3E in the traveling direction comes into contact with the crown surface 2d of the rail 2B on the outer rail side. Therefore, when the vehicle passes through the curved section, the position of rolling on the rail 2B on the outer rail side is different between the wheel 3B on the front side in the traveling direction and the wheel 3B on the rear side in the traveling direction.

When the tangential force measuring device 4 shown in FIG. 26 travels along the rails 2A and 2B, the measuring wheel 38 passes the portion where the wheel 3B on the front side in the traveling direction passes, and the portion where the wheel 3B on the front side in the traveling direction passes is measured. Wheel 14B passes through. When the measuring wheel 38 rolls along the gauge corner 2f of the rail 2B on the outer rail side with which the flange surface 3b of the wheel 3B contacts, the lateral pressure detecting unit 41 detects the lateral pressure Q and gauges the rail 2B on the outer rail side. The coefficient of friction μ of the corner 2f is measured. When the measurement wheel 14B rolls along the crown surface 2d of the rail 2B on the outer rail side with which the tread surface 3a of the wheel 3B contacts, the tangential force detection unit 18B detects the tangential force T and the crown surface of the rail 2B on the outer rail side. The coefficient of friction μ of 2d is measured.

The tangential force measuring device according to the fifth embodiment has the following effects in addition to the effects of the first to third embodiments.
In the fifth embodiment, the inner rail measuring wheel 14A rolls along the inner rail side rail 2A of the curved section, and the outer rail measuring wheel 14B rolls along the outer rail side rail 2B of this curved section. Further, in the fifth embodiment, the left and right tangential force T ₁ of the rail 2A on the inner rail side is detected by the tangential force detection unit 18A of the inner rail, and the left and right tangential force T ₁ of the rail 2B on the outer rail side is detected by the outer rail. The tangential force detection unit 18B detects it. Further, in the fifth embodiment, the measurement wheel of the outer rail is formed along the gauge corner 2f of the rail 2B on the outer rail side so that the lateral pressure Q is generated in the left-right direction of the rail 2B on the outer rail side of the curved section. 38 rolls, and the lateral pressure Q is detected by the lateral pressure detecting unit 41. Therefore, by continuously measuring the lateral pressure Q and the tangential force T of the rail 2B on the outer rail side of the curved section, the friction coefficient μ of the gauge corner 2f and the friction coefficient μ of the crown surface 2d are measured at the same time. be able to.

(Other embodiments)
The present invention is not limited to the embodiments described above, and various modifications or modifications can be made as described below, and these are also within the scope of the present invention.
(1) In this embodiment, the case where the rails 2A and 2B have a narrow gauge such as a conventional line with a gauge of 1067 mm has been described as an example, but this case also has a standard gauge such as a Shinkansen with a gauge of 1435 mm. The invention can be applied. In this case, a connecting portion 22A that can be attached and detached in two types of lengths, one for narrow gauge and one for standard gauge, or the connecting portion 22A that can be expanded and contracted to two types of lengths, can be attached and detached or expanded and contracted according to the gauge. it can. Further, in this embodiment, the case where the tangential force measuring device 4 is driven in the _{D 1} and D ₂ directions by connecting the manual operation unit 25 to the end portion 6c of the housing unit 6 and pushing and pulling by the measurer M is used. Although described by way of example, the present invention is not limited to such a structure. For example, the manual operation unit 25 is detachably connected to the ends 6c and 6d of the housing unit 6, and the tangential force measuring device 4 is driven in the _{D 1} and D _{2 directions by being pushed and pulled by the measurer M.} You can also.

(2) In this embodiment, the case where the measurer M runs the tangential force measuring device 4 while walking has been described as an example, but there is also a case where the measuring device 4 is self-propelled by carrying power. , The present invention can be applied. Further, in this embodiment, the case where the photographing unit 32 photographs the state of the rail surface in front of the measuring wheel 14 before the measuring wheel 14 passes has been described as an example, but after the measuring wheel 14 has passed, it has been described. The present invention can also be applied to the case where the photographing unit 32 photographs the state of the rail surface behind the measuring wheel 14.

(3) In the first to third embodiments, the case where the measuring wheel 14 is run along the rail 2A on the inner rail side of the curved section to measure the tangential force T has been described as an example. The present invention can also be applied to the case where the measuring wheel 14 is run along the rail 2B on the outer rail side of the curved section to measure the tangential force T. Further, in the fifth embodiment, the case where the measuring wheel 38 is arranged in front of the measuring wheel 14A and the measuring wheel 14B is arranged behind the measuring wheel 14B has been described as an example. The present invention is not limited to. For example, when the measurement wheel 14B is arranged in front of the measurement wheel 14A and the measurement wheel 38 is arranged behind the measurement wheel 14A, or when the measurement wheel 14A and the measurement wheels 14B and 36 are arranged side by side. , The present invention can be applied.

1 track 2A rail (inner rail side rail (right rail))
2B rail (outer rail side rail (left rail))
2a Rail head 2b Rail bottom 2c Rail side 2d Head top 2e Head side 2f Gauge corner 3A, 3B Wheels 3C Axle 3D Axle 3E Axle 3a Tread 3b Flange surface 4 Contact force measuring device 5,5A, 5B Traveling trolley 6 Body 7A, 7B Traveling wheel 8 Support 9A, 9B Guide wheel 10 Support 11, 11A, 11B Measuring trolley 12 Housing 13 Mounting wheel 14, 14A, 14B Measuring wheel 15 Support 16 Weight 17 Guide 18 , 18A, 18B Contact force detection unit 19 Position adjustment unit 20 Traveling wheel 21 Load receiving wheel 22A to 22C Connecting part 23A to 23D Connection part 24A, 24B Insulation part 25 Manual operation part 27 Rotation amount detecting part 28 Mileage calculation part 29 Tilt Angle measurement unit 30 Contact force correction unit 31 Friction coefficient calculation unit 32 Imaging unit 33 Display unit 34 Data storage unit 35 Control unit 36 Measuring trolley 37 Housing unit 38 Measuring wheel 39A, 39B Support unit 40A, 40B Guide unit 41 Lateral pressure detection Part 42 Lateral pressure calculation part M Measurer D ₁ , D ₂ direction (travel direction)
D ₃ and D ₄ directions (rail width direction (horizontal direction))
T tangential force T ₁ left and right tangential force T ₂ front and rear tangential force N normal force (normal force)
F ₀ load R reaction force Q lateral pressure P wheel load F coefficient of friction θ _A attack angle θ _C inclination angle θ _α gradient angle S slack C cant B contact width D deposits L rail oiler

Claims (15)

A tangential force measuring device that measures the tangential force generated by slipping between wheels / rails.
A measuring wheel that continuously rolls along this rail at a predetermined attack angle so that a left-right tangential force is generated in the left-right direction of the rail.
The tangential force detecting unit that detects the left and right tangential force, and
A tangential force measuring device comprising. In the tangential force measuring device according to claim 1,
A guide wheel that guides the measuring wheel while rolling along the side surface of the head of the rail so that the measuring wheel rolls along a predetermined position on the top surface of the rail.
Provided with a load acting portion that applies a substantially constant load to the guide wheels so that the guide wheels are in close contact with the side surface of the head of the rail.
A tangential force measuring device characterized by. In the tangential force measuring device according to claim 2,
The measuring wheel is provided with a load-bearing wheel that receives a load acting from the left-right direction of the rolling rail while rolling along the side surface of the head of the rail opposite to the rolling rail.
The load acting portion applies a substantially constant load to the load receiving wheel so that the load receiving wheel comes into close contact with the side surface of the head of the rail on the opposite side.
A tangential force measuring device characterized by. In the tangential force measuring device according to claim 3,
When the distance between the left and right rails becomes wide, the load-bearing portion applies a substantially constant load to the load-bearing wheels so that the load-bearing wheels come into close contact with the side surface of the head of the opposite rail. To let
A tangential force measuring device characterized by. In the tangential force measuring device according to any one of claims 1 to 4.
The measuring wheel rolls along the inner rail on the curved section,
The tangential force detecting unit detects the left and right tangential force of the inner rail side rail.
A tangential force measuring device characterized by. In the tangential force measuring device according to any one of claims 1 to 4.
The measuring wheel
The right measuring wheel that rolls along the right rail in the straight section,
It is equipped with a left measuring wheel that rolls along the left rail of the straight section.
The tangential force detection unit
The right tangential force detection unit that detects the left and right tangential forces of the right rail,
Provided with a left tangential force detecting unit for detecting the left and right tangential force of the left rail.
A tangential force measuring device characterized by. In the tangential force measuring device according to any one of claims 1 to 4.
The measuring wheel
The measuring wheel of the inner rail that rolls along the inner rail on the curved section,
It is equipped with an outer rail measuring wheel that rolls along the outer rail side rail of the curved section.
The tangential force detection unit
The tangential force detection unit of the inner rail that detects the left and right tangential force of the inner rail side rail,
Provided with an outer rail tangential force detecting unit that detects the left and right tangential forces of the outer rail side rail.
A tangential force measuring device characterized by. In the tangential force measuring device according to claim 7.
An outer rail measuring wheel that rolls along the gauge corner of the outer rail so that lateral pressure is generated in the left-right direction of the outer rail in the curved section.
Provided with a lateral pressure detecting unit for detecting the lateral pressure.
A tangential force measuring device characterized by. In the tangential force measuring device according to any one of claims 1 to 4.
The measuring wheel rolls along the inner rail on the curved section,
The tangential force detecting unit detects the left and right tangential force of the inner rail side rail, and
An outer rail measuring wheel that rolls along the gauge corner of the outer rail so that lateral pressure is generated in the left-right direction of the outer rail in the curved section.
Provided with a lateral pressure detecting unit for detecting the lateral pressure.
A tangential force measuring device characterized by. The tangential force measuring device according to any one of claims 5 to 9.
A friction coefficient calculation unit for calculating the friction coefficient between the measurement wheel and the rail based on the detection result of the tangential force detection unit is provided.
A tangential force measuring device characterized by. In the tangential force measuring device according to claim 8 or 9.
A friction coefficient calculation unit for calculating the friction coefficient between the measurement wheel and the rail based on the detection result of the lateral pressure detection unit is provided.
A tangential force measuring device characterized by. The tangential force measuring device according to any one of claims 1 to 11.
Provided with an inclination angle measuring unit for measuring the inclination angle of the measuring wheel when the measuring wheel rolls along the rail of the curved section to which the cant is attached.
A tangential force measuring device characterized by. The tangential force measuring device according to any one of claims 1 to 12.
An imaging unit that captures the state of the rail surface on which the measuring wheels roll,
Provided with a display unit for displaying a captured image captured by the photographing unit.
A tangential force measuring device characterized by. The tangential force measuring device according to any one of claims 1 to 13.
The measurement wheel shall be detachably mounted by changing the direction of the measurement wheel so that the measurement wheel rotates in the same direction during reciprocating measurement.
A tangential force measuring device characterized by. The tangential force measuring device according to any one of claims 1 to 14.
The tangential force detecting unit detects the left and right tangential force and also detects the front-rear tangential force generated in the front-rear direction of the rail.
A tangential force measuring device characterized by.

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