JP7014204B2

JP7014204B2 - Wheel diameter measuring device

Info

Publication number: JP7014204B2
Application number: JP2019104451A
Authority: JP
Inventors: 涛劉; 靖志森川
Original assignee: Daifuku Co Ltd
Current assignee: Daifuku Co Ltd
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2022-02-01
Anticipated expiration: 2039-06-04
Also published as: JP2020197473A

Description

本発明は、レールの走行面上を転動する車輪の径を計測する車輪径計測装置に関する。 The present invention relates to a wheel diameter measuring device that measures the diameter of a wheel rolling on a running surface of a rail.

このような車輪径計測装置として、例えば、特開２００５－３５１７１３号公報（特許文献１）に記載されたものが知られている。以下、背景技術の説明において、かっこ書きの符号又は名称は、先行技術文献における符号又は名称とする。この特許文献１に記載の車輪径計測装置は、車輪（２）を備えた車両に装備されており、車輪（２）に対して位置が固定された摩耗検出センサー１０を備えている。この車輪径計測装置は、摩耗検出センサー１０によって当該摩耗検出センサー１０から車輪（２）の外周走行面３まで距離を計測し、この計測結果に基づいて、車輪（２）の摩耗量を把握できるようになっている。 As such a wheel diameter measuring device, for example, the one described in Japanese Patent Application Laid-Open No. 2005-351713 (Patent Document 1) is known. Hereinafter, in the description of the background art, the reference numerals or names in parentheses shall be the reference numerals or names in the prior art documents. The wheel diameter measuring device described in Patent Document 1 is mounted on a vehicle provided with wheels (2), and includes a wear detection sensor 10 whose position is fixed with respect to the wheels (2). This wheel diameter measuring device measures the distance from the wear detection sensor 10 to the outer peripheral traveling surface 3 of the wheel (2) by the wear detection sensor 10, and can grasp the amount of wear of the wheel (2) based on the measurement result. It has become like.

特開２００５－３５１７１３号公報Japanese Unexamined Patent Publication No. 2005-351713

上記した車輪径計測装置は、車輪（２）に対して位置が固定された状態で摩耗検出センサー１０が備えられているため、計測対象の車輪（２）が複数あれば、その複数の車輪（２）の夫々に対して摩耗検出センサー１０を備える必要がある。そのため、計測対象の車輪の数が多くなるに伴って摩耗検出センサー１０の設置数が多くなり、車輪径計測装置の設置コストが高くなる。複数の車輪（２）のそれぞれについての車輪径の計測の頻度が高くない場合には、このような構成は望ましくない。 Since the wheel diameter measuring device described above is provided with the wear detection sensor 10 in a state where the position is fixed with respect to the wheel (2), if there are a plurality of wheels (2) to be measured, the plurality of wheels (2) thereof ( It is necessary to provide a wear detection sensor 10 for each of 2). Therefore, as the number of wheels to be measured increases, the number of wear detection sensors 10 installed increases, and the installation cost of the wheel diameter measuring device increases. Such a configuration is not desirable when the frequency of measuring the wheel diameter for each of the plurality of wheels (2) is not high.

そこで、設置コストを低く抑えることができる車輪径計測装置の実現が望まれる。 Therefore, it is desired to realize a wheel diameter measuring device that can keep the installation cost low.

上記に鑑みた、車輪径計測装置の特徴構成は、レールの走行面上を転動する車輪の径を計測する車輪径計測装置において、投光部と受光部とを有する光センサと、前記車輪の径方向の寸法である車輪径を計測する計測部と、を備え、前記投光部と前記受光部とは、前記車輪の走行軌跡を挟んで上下方向に分かれて設置され、前記投光部は、前記レールの延在方向に沿う幅を有する帯状の検出光を投光するように構成され、前記検出光の前記延在方向の範囲が、前記延在方向に前記車輪の直径分離れた２個所を含むように設定され、前記計測部は、前記受光部が受光した前記検出光に基づいて前記車輪径を計測する点にある。 In view of the above, the characteristic configuration of the wheel diameter measuring device is a wheel diameter measuring device for measuring the diameter of a wheel rolling on a running surface of a rail, in which an optical sensor having a light emitting portion and a light receiving portion and the wheel. A measuring unit for measuring the wheel diameter, which is a dimension in the radial direction of the wheel, is provided. Is configured to emit a band-shaped detection light having a width along the extension direction of the rail, and the range of the detection light in the extension direction is separated by the diameter of the wheel in the extension direction. The measuring unit is set to include two locations, and the measuring unit measures the wheel diameter based on the detected light received by the light receiving unit.

この特徴構成によれば、投光部と受光部とが車輪の走行軌跡を挟んで上下方向に分かれて設置されているため、投光部及び受光部に対して車輪が延在方向に移動したとしても、車輪が投光部又は受光部に干渉することを回避できる。そして、検出光の延在方向の範囲内に車輪が位置した状態で、計測部によってその車輪の車輪径を計測できるため、車輪に対して固定された位置に光センサを配置する必要がない。また、検出光は延在方向に幅を有する帯状とされており、延在方向に広がりを有する範囲で車輪径を計測できるため、車輪径を計測することが可能な車輪の位置の制約が少ない。従って、車輪径を計測する場合における、車輪の動作状態の制約を少なくすることができる。 According to this characteristic configuration, since the light emitting part and the light receiving part are separately installed in the vertical direction with the traveling locus of the wheel in between, the wheel moves in the extending direction with respect to the light emitting part and the light receiving part. Even so, it is possible to prevent the wheels from interfering with the light emitting portion or the light receiving portion. Then, since the wheel diameter of the wheel can be measured by the measuring unit in a state where the wheel is located within the range in the extending direction of the detected light, it is not necessary to arrange the optical sensor at a position fixed to the wheel. In addition, the detected light has a band shape having a width in the extending direction, and the wheel diameter can be measured within a range having a spread in the extending direction, so that there are few restrictions on the position of the wheel capable of measuring the wheel diameter. .. Therefore, it is possible to reduce restrictions on the operating state of the wheel when measuring the wheel diameter.

このように、本構成によれば、検出光の延在方向の範囲内に複数の車輪を順次位置させることで、計測部によって複数の車輪のそれぞれの車輪径を計測することができる。従って、計測対象の車輪が複数ある場合に、それら複数の車輪の夫々に対して計測装置を配置する必要がないため、車輪径計測装置の設置コストを低く抑えることができる。 As described above, according to this configuration, by sequentially locating the plurality of wheels within the range in the extending direction of the detected light, the wheel diameter of each of the plurality of wheels can be measured by the measuring unit. Therefore, when there are a plurality of wheels to be measured, it is not necessary to arrange the measuring device for each of the plurality of wheels, so that the installation cost of the wheel diameter measuring device can be kept low.

物品搬送設備の側面図Side view of goods transport equipment 物品搬送車の正面図Front view of the goods carrier 車輪径計測装置の正面図Front view of wheel diameter measuring device 車輪径計測装置の側面図Side view of wheel diameter measuring device 第１レール部の平面図Plan view of the first rail part 制御ブロック図Control block diagram 計測表示制御のフローチャートFlow chart of measurement display control 別の実施形態における車輪径計測装置の側面図Side view of the wheel diameter measuring device in another embodiment

１．実施形態
車輪径計測装置を備えた物品搬送設備の実施形態について図面に基づいて説明する。
図１に示すように、物品搬送設備には、レール１と、レール１の走行面Ｆ上を転動する車輪２を備えた物品搬送車３と、車輪２の径を計測する車輪径計測装置４と、を備えている。物品搬送車３は、レール１に沿って走行して物品Ｗを搬送する。尚、本実施形態では、半導体基板を収容するＦＯＵＰ（Front Opening Unified Pod）を物品Ｗとしている。 1. 1. Embodiment An embodiment of an article transporting facility provided with a wheel diameter measuring device will be described with reference to the drawings.
As shown in FIG. 1, the article transport equipment includes a rail 1, an article transport vehicle 3 provided with wheels 2 rolling on a traveling surface F of the rail 1, and a wheel diameter measuring device for measuring the diameter of the wheels 2. 4 and. The article carrier 3 travels along the rail 1 to convey the article W. In the present embodiment, the FOUP (Front Opening Unified Pod) accommodating the semiconductor substrate is referred to as the article W.

以下、レール１が延在する延在方向Ｘの一方側を延在方向第１側Ｘ１と称し、その反対側を延在方向第２側Ｘ２と称する。また、上下方向Ｚに沿う上下方向視で延在方向Ｘに対して直交する方向を幅方向Ｙと称し、幅方向Ｙの一方側を幅方向第１側Ｙ１と称し、その反対側を幅方向第２側Ｙ２と称する。尚、図１にハッチングを施した太い矢印で示すように、物品搬送車３は、延在方向第２側Ｘ２から延在方向第１側Ｘ１に向けて一方向に走行する。また、本実施形態では、レール１が水平方向に沿って設置されている場合を例として説明する。 Hereinafter, one side of the extending direction X in which the rail 1 extends is referred to as an extending direction first side X1, and the opposite side thereof is referred to as an extending direction second side X2. Further, the direction orthogonal to the extending direction X in the vertical direction along the vertical direction Z is referred to as the width direction Y, one side of the width direction Y is referred to as the first side Y1 in the width direction, and the opposite side is referred to as the width direction. It is called the second side Y2. As shown by the thick arrow hatched in FIG. 1, the article transport vehicle 3 travels in one direction from the second side X2 in the extending direction to the first side X1 in the extending direction. Further, in the present embodiment, a case where the rail 1 is installed along the horizontal direction will be described as an example.

図２に示すように、レール１は、第１レール部１Ａと第２レール部１Ｂとを備えている。これら第１レール部１Ａと第２レール部１Ｂとは、上下方向視で幅方向Ｙに一定間隔で互いに平行に配置されている。第１レール部１Ａは、第２レール部１Ｂに対して幅方向第１側Ｙ１に位置している。 As shown in FIG. 2, the rail 1 includes a first rail portion 1A and a second rail portion 1B. The first rail portion 1A and the second rail portion 1B are arranged in parallel with each other at regular intervals in the width direction Y in the vertical direction. The first rail portion 1A is located on the first side Y1 in the width direction with respect to the second rail portion 1B.

図１及び図２に示すように、物品搬送車３は、レール１上をそのレール１に沿って走行する走行部６と、レール１の下方に位置して走行部６に吊り下げ支持された物品支持部７と、を備えている。物品支持部７は、物品Ｗを吊り下げ状態で支持する支持装置８と、支持装置８を上下方向Ｚに移動させる昇降装置（図示せず）とを備えている。 As shown in FIGS. 1 and 2, the article carrier 3 is suspended and supported by a traveling portion 6 traveling on the rail 1 along the rail 1 and a traveling portion 6 located below the rail 1. It is provided with an article support portion 7. The article support portion 7 includes a support device 8 that supports the article W in a suspended state, and an elevating device (not shown) that moves the support device 8 in the vertical direction Z.

図１に示すように、走行部６は、第１走行ユニット６Ａと、この第１走行ユニット６Ａに対して延在方向第２側Ｘ２に位置する第２走行ユニット６Ｂと、を備えている。図２に示すように、第１走行ユニット６Ａは、第１車輪２Ａ及び第２車輪２Ｂからなる一対の車輪２と、一対の車輪２を幅方向Ｙに沿う回転軸心周りに回転させる走行用モータ１１（図１参照）と、を備えている。一対の車輪２の夫々は、レール１の走行面Ｆを転動する。説明を加えると、第１車輪２Ａと第２車輪２Ｂとは、第１車輪２Ａが第２車輪２Ｂに対して幅方向第１側Ｙ１に位置するように、幅方向Ｙに並んでいる。そして、第１車輪２Ａは、第１レール部１Ａの走行面Ｆを転動し、第２車輪２Ｂは、第２レール部１Ｂの走行面Ｆを転動する。 As shown in FIG. 1, the traveling unit 6 includes a first traveling unit 6A and a second traveling unit 6B located on the second side X2 in the extending direction with respect to the first traveling unit 6A. As shown in FIG. 2, the first traveling unit 6A is for traveling in which a pair of wheels 2 including the first wheel 2A and the second wheel 2B and the pair of wheels 2 are rotated around a rotation axis along the width direction Y. It includes a motor 11 (see FIG. 1). Each of the pair of wheels 2 rolls on the traveling surface F of the rail 1. To add an explanation, the first wheel 2A and the second wheel 2B are arranged in the width direction Y so that the first wheel 2A is located on the first side Y1 in the width direction with respect to the second wheel 2B. Then, the first wheel 2A rolls on the traveling surface F of the first rail portion 1A, and the second wheel 2B rolls on the traveling surface F of the second rail portion 1B.

また、図２に示すように、第１走行ユニット６Ａは、上下方向Ｚに沿う上下軸心周りで回転自在な複数の案内輪１２を備えている。本実施形態では、複数の案内輪１２として、第１レール部１Ａに接触する一対の第１案内輪１２Ａと、第２レール部１Ｂに接触する一対の第２案内輪１２Ｂと、がある。一対の第１案内輪１２Ａは、延在方向Ｘに並ぶ状態で第１走行ユニット６Ａに備えられており、これら一対の第１案内輪１２Ａの夫々が、第１レール部１Ａにおける幅方向第２側Ｙ２を向く側面（内側面）に幅方向第２側Ｙ２から接触する。また、一対の第２案内輪１２Ｂは、延在方向Ｘに並ぶ状態で第１走行ユニット６Ａに備えられており、これら一対の第２案内輪１２Ｂの夫々が、第２レール部１Ｂにおける幅方向第１側Ｙ１を向く側面（内側面）に幅方向第１側Ｙ１から接触する。 Further, as shown in FIG. 2, the first traveling unit 6A includes a plurality of guide wheels 12 that are rotatable around the vertical axis along the vertical direction Z. In the present embodiment, the plurality of guide wheels 12 include a pair of first guide wheels 12A in contact with the first rail portion 1A and a pair of second guide wheels 12B in contact with the second rail portion 1B. The pair of first guide wheels 12A are provided in the first traveling unit 6A in a state of being lined up in the extending direction X, and each of the pair of first guide wheels 12A is the second in the width direction in the first rail portion 1A. It contacts the side surface (inner side surface) facing the side Y2 from the second side Y2 in the width direction. Further, the pair of second guide wheels 12B are provided in the first traveling unit 6A in a state of being lined up in the extending direction X, and each of the pair of second guide wheels 12B is in the width direction in the second rail portion 1B. It contacts the side surface (inner side surface) facing the first side Y1 from the first side Y1 in the width direction.

第２走行ユニット６Ｂは、第１走行ユニット６Ａと同様に、一対の車輪２、走行用モータ１１、及び複数の案内輪１２を備えている。 Like the first traveling unit 6A, the second traveling unit 6B includes a pair of wheels 2, a traveling motor 11, and a plurality of guide wheels 12.

物品搬送車３は、第１走行ユニット６Ａ及び第２走行ユニット６Ｂの夫々において、走行用モータ１１により一対の車輪２を回転させ、複数の案内輪１２がレール１により案内されることによって、レール１に沿って走行する。 In the article carrier 3, the pair of wheels 2 are rotated by the traveling motor 11 in each of the first traveling unit 6A and the second traveling unit 6B, and the plurality of guide wheels 12 are guided by the rail 1 to guide the rails. Drive along 1.

次に、車輪径計測装置４について説明する。本実施形態では、物品搬送設備は、複数の物品搬送車３を備えており、複数の物品搬送車３が備えている車輪２として、何れも同じ車輪径Ｒの車輪２を用いている。しかし、物品搬送車３の走行によって車輪２が摩耗して車輪径Ｒが小さくなった場合には、車輪２の交換が必要となるため、各車輪２の車輪径Ｒを計測するために、物品搬送設備は、車輪径計測装置４を備えている。 Next, the wheel diameter measuring device 4 will be described. In the present embodiment, the article transport facility includes a plurality of article transport vehicles 3, and as the wheels 2 included in the plurality of article transport vehicles 3, wheels 2 having the same wheel diameter R are used. However, when the wheel 2 is worn and the wheel diameter R becomes small due to the traveling of the article carrier 3, the wheel 2 needs to be replaced. Therefore, in order to measure the wheel diameter R of each wheel 2, the article The transport equipment includes a wheel diameter measuring device 4.

本実施形態では、図３に示すように、物品搬送設備は、第１車輪２Ａの車輪径Ｒを計測する第１車輪径計測装置４Ａと、第２車輪２Ｂの車輪径Ｒを計測する第２車輪径計測装置４Ｂと、を備えている。これらはそれぞれが車輪径計測装置４である。これらの車輪径計測装置４は、幅方向Ｙに反転させた状態で構成されている以外は同様に構成されているため、第１車輪径計測装置４Ａについて説明し、第２車輪径計測装置４Ｂについての説明は省略する。 In the present embodiment, as shown in FIG. 3, the article transport facility has a first wheel diameter measuring device 4A for measuring the wheel diameter R of the first wheel 2A and a second wheel diameter R measuring the wheel diameter R of the second wheel 2B. It is equipped with a wheel diameter measuring device 4B. Each of these is a wheel diameter measuring device 4. Since these wheel diameter measuring devices 4 are configured in the same manner except that they are configured in a state of being inverted in the width direction Y, the first wheel diameter measuring device 4A will be described and the second wheel diameter measuring device 4B will be described. The description of is omitted.

図４及び図６に示すように、第１車輪径計測装置４Ａは、投光部１６と受光部１７とを有する光センサ１８と、車輪２の径方向の寸法である車輪径Ｒを計測する計測部１９と、計測部１９による計測結果を表示する表示部２０と、を備えている。計測部１９と表示部２０とは、第１車輪径計測装置４Ａの本体部２４に備えられている。尚、図３に示す例では、延在方向Ｘに向けて計測結果を表示するように表示部２０を設置したが、表示部２０の向きは適宜変更してもよく、例えば、幅方向Ｙに向けて計測結果を表示するように表示部２０を設置してもよい。 As shown in FIGS. 4 and 6, the first wheel diameter measuring device 4A measures a light sensor 18 having a light emitting unit 16 and a light receiving unit 17, and a wheel diameter R which is a radial dimension of the wheel 2. A measurement unit 19 and a display unit 20 for displaying the measurement result by the measurement unit 19 are provided. The measuring unit 19 and the display unit 20 are provided in the main body unit 24 of the first wheel diameter measuring device 4A. In the example shown in FIG. 3, the display unit 20 is installed so as to display the measurement result in the extension direction X, but the orientation of the display unit 20 may be changed as appropriate, for example, in the width direction Y. The display unit 20 may be installed so as to display the measurement result toward the target.

投光部１６と受光部１７とは、車輪２の走行軌跡Ｔを挟んで上下方向Ｚに分かれて設置されている。ここで、車輪２の走行軌跡Ｔとは、車輪２がレール１に走行面Ｆ上を転動しつつ延在方向Ｘに移動した場合の車輪２の軌跡を指す。投光部１６は、延在方向Ｘに対して直交する方向に沿って検出光２１を投光するように設置されている。受光部１７は、その検出光２１を受光するように設置されている。本実施形態では、投光部１６は、車輪２の走行軌跡Ｔに対して上方側Ｚ１に設置されており、受光部１７は、走行軌跡Ｔに対して下方側Ｚ２に設置されている。そして、投光部１６は、鉛直下方（下方側Ｚ２）に向けて検出光２１を投光するように設置されている。 The light emitting unit 16 and the light receiving unit 17 are installed separately in the vertical direction Z with the traveling locus T of the wheel 2 interposed therebetween. Here, the traveling locus T of the wheel 2 refers to the locus of the wheel 2 when the wheel 2 moves on the traveling surface F on the rail 1 and moves in the extending direction X. The light projecting unit 16 is installed so as to project the detection light 21 along a direction orthogonal to the extending direction X. The light receiving unit 17 is installed so as to receive the detected light 21. In the present embodiment, the light emitting unit 16 is installed on the upper side Z1 with respect to the traveling locus T of the wheel 2, and the light receiving unit 17 is installed on the lower side Z2 with respect to the traveling locus T. The light projecting unit 16 is installed so as to project the detection light 21 toward the vertically lower side (lower side Z2).

投光部１６は、延在方向Ｘに沿う幅を有する帯状の検出光２１を投光するように構成されている。また、検出光２１の延在方向Ｘの範囲が、延在方向Ｘに車輪２の直径分離れた２個所を含むように設定されている。尚、この場合における車輪２の直径は、基準となる車輪２である基準車輪の車輪径Ｒである基準車輪径Ｒ１としている。本実施形態では、未使用の車輪２（摩耗していない車輪２）を基準車輪として、この基準車輪の車輪径Ｒ（基準車輪径Ｒ１）を、ここでの車輪２の直径としている。 The light projecting unit 16 is configured to project a band-shaped detection light 21 having a width along the extending direction X. Further, the range of the extending direction X of the detection light 21 is set so as to include two places where the diameters of the wheels 2 are separated in the extending direction X. In this case, the diameter of the wheel 2 is the reference wheel diameter R1 which is the wheel diameter R of the reference wheel which is the reference wheel 2. In the present embodiment, the unused wheel 2 (the wheel 2 that is not worn) is used as the reference wheel, and the wheel diameter R (reference wheel diameter R1) of the reference wheel is used as the diameter of the wheel 2 here.

また、本実施形態では、未使用の車輪２の直径を、計測対象の車輪２の中で最も大きい車輪径Ｒである最大車輪径Ｒ２としている。つまり、基準車輪径Ｒ１と最大車輪径Ｒ２とが同じとなっている。また、本実施形態では、想定される範囲で最も摩耗が進んで小さくなった車輪２の直径を、計測対象の車輪２の中で最も小さい車輪径Ｒである最小車輪径Ｒ３としている。ここでは、最小車輪径Ｒ３の車輪２とは、交換が必要な程度に摩耗が進んだ車輪２である。 Further, in the present embodiment, the diameter of the unused wheel 2 is set to the maximum wheel diameter R2, which is the largest wheel diameter R among the wheels 2 to be measured. That is, the reference wheel diameter R1 and the maximum wheel diameter R2 are the same. Further, in the present embodiment, the diameter of the wheel 2 that has become the smallest due to the progress of wear in the assumed range is set as the minimum wheel diameter R3, which is the smallest wheel diameter R among the wheels 2 to be measured. Here, the wheel 2 having the minimum wheel diameter R3 is a wheel 2 that has been worn to the extent that it needs to be replaced.

投光部１６は、第１投光体１６Ａと、この第１投光体１６Ａに対して延在方向第２側Ｘ２に設置された第２投光体１６Ｂとを備えている。これら第１投光体１６Ａ及び第２投光体１６Ｂは、車輪２より上方側Ｚ１に位置するように支持体２２に支持されている。また、第１投光体１６Ａ及び第２投光体１６Ｂは、延在方向Ｘに並ぶ状態で同じ高さに設置されている。尚、本実施形態では、支持体２２は、第１レール部１Ａの幅方向第１側Ｙ１を向く側面に固定されている。 The light projecting unit 16 includes a first light projecting body 16A and a second light projecting body 16B installed on the second side X2 in the extending direction with respect to the first light projecting body 16A. The first floodlight 16A and the second floodlight 16B are supported by the support 22 so as to be located on the Z1 above the wheel 2. Further, the first floodlight 16A and the second floodlight 16B are installed at the same height in a state of being lined up in the extending direction X. In this embodiment, the support 22 is fixed to the side surface of the first rail portion 1A facing the first side Y1 in the width direction.

第１投光体１６Ａの投光により、延在方向Ｘに沿う幅を有する帯状の第１帯状光部２１Ａが形成される。また、第２投光体１６Ｂの投光により、延在方向Ｘに沿う幅を有する帯状の第２帯状光部２１Ｂが形成される。本実施形態では、第１帯状光部２１Ａ及び第２帯状光部２１Ｂの延在方向Ｘの大きさは、最大車輪径Ｒ２の１／３から１／２０の間の値としている。例えば、最大車輪径Ｒ２が１２５ｍｍに対して、第１帯状光部２１Ａ及び第２帯状光部２１Ｂの延在方向Ｘの大きさを１０ｍｍとすることができる。第１投光体１６Ａ及び第２投光体１６Ｂは、第１帯状光部２１Ａと第２帯状光部２１Ｂとを延在方向Ｘに最小車輪径Ｒ３より狭い隙間Ｌ１を開けた状態で投光するように設置されている。本実施形態では、検出光２１は、第１帯状光部２１Ａと第２帯状光部２１Ｂとで構成されており、第１帯状光部２１Ａ及び第２帯状光部２１Ｂは、隙間Ｌ１を開けて離間した２本の帯状光部に相当する。 The light projection of the first floodlight 16A forms a band-shaped first band-shaped light portion 21A having a width along the extending direction X. Further, the light projection of the second floodlight 16B forms a band-shaped second band-shaped light portion 21B having a width along the extending direction X. In the present embodiment, the size of the extending direction X of the first band-shaped light portion 21A and the second band-shaped light portion 21B is a value between 1/3 and 1/20 of the maximum wheel diameter R2. For example, the size of the extending direction X of the first band-shaped light portion 21A and the second band-shaped light portion 21B can be 10 mm with respect to the maximum wheel diameter R2 of 125 mm. The first floodlight 16A and the second floodlight 16B project light with a gap L1 narrower than the minimum wheel diameter R3 in the extending direction X between the first band-shaped light section 21A and the second band-shaped light section 21B. It is installed to do. In the present embodiment, the detection light 21 is composed of a first band-shaped light portion 21A and a second band-shaped light section 21B, and the first band-shaped light section 21A and the second band-shaped light section 21B have a gap L1. It corresponds to two separated band-shaped light portions.

そして、このような第１帯状光部２１Ａ及び第２帯状光部２１Ｂを含む検出光２１の延在方向Ｘの範囲が、延在方向Ｘに基準車輪径Ｒ１分離れた２個所を含むように設定されている。説明を加えると、図４に示すように、車輪２（基準車輪）が設定位置（図４に示す位置）にある状態において、第１帯状光部２１Ａの延在方向Ｘの範囲内に、車輪２の延在方向第１側Ｘ１の端部が含まれ、第２帯状光部２１Ｂの延在方向Ｘの範囲内に、車輪２の延在方向第２側Ｘ２の端部が含まれるように、これらの帯状光部が設定されている。好ましくは、車輪２（基準車輪）が設定位置に位置している状態において、第１帯状光部２１Ａの延在方向Ｘの中央部に、車輪２の延在方向第１側Ｘ１の端部が位置し、第２帯状光部２１Ｂの延在方向Ｘの中央部に、車輪２の延在方向第２側Ｘ２の端部が位置するように、第１投光体１６Ａや第２投光体１６Ｂが設置されているとよい。 Then, the range of the extending direction X of the detection light 21 including the first band-shaped light portion 21A and the second band-shaped light portion 21B includes two places separated by the reference wheel diameter R1 in the extending direction X. It is set. As shown in FIG. 4, when the wheel 2 (reference wheel) is in the set position (position shown in FIG. 4), the wheel is within the range of the extending direction X of the first band-shaped light portion 21A. The end of the extending direction 1st side X1 of 2 is included, and the end of the extending direction 2nd side X2 of the wheel 2 is included within the range of the extending direction X of the second band-shaped light portion 21B. , These band-shaped light parts are set. Preferably, in a state where the wheel 2 (reference wheel) is located at the set position, the end portion of the first side X1 in the extending direction of the wheel 2 is located at the center of the extending direction X of the first band-shaped light portion 21A. The first floodlight 16A and the second floodlight are located so that the end of the second side X2 in the extending direction of the wheel 2 is located at the center of the extending direction X of the second band-shaped light portion 21B. It is good that 16B is installed.

また、本実施形態では、車輪２を設定位置に停止させた状態で、計測部１９による計測を行う。このような場合において、車輪２の停止位置が設定位置に対して延在方向にずれる場合がある。そこで、検出光２１の延在方向Ｘの両端間の距離Ｌ２が、最大車輪径Ｒ２に停止最大誤差Ｌ３を加えた長さより大きくなるように設定されている。本実施形態では、第１帯状光部２１Ａの延在方向第１側Ｘ１の端部から第２帯状光部２１Ｂの延在方向第２側Ｘ２の端部までの距離が、検出光２１の延在方向Ｘの両端間の距離Ｌ２となっている。また、車輪２を設定位置に停止させる場合における車輪２の停止位置の設定位置に対する誤差の最大値を停止最大誤差Ｌ３としている。 Further, in the present embodiment, the measurement is performed by the measuring unit 19 with the wheel 2 stopped at the set position. In such a case, the stop position of the wheel 2 may shift in the extending direction with respect to the set position. Therefore, the distance L2 between both ends of the detection light 21 in the extending direction X is set to be larger than the length obtained by adding the stop maximum error L3 to the maximum wheel diameter R2. In the present embodiment, the distance from the end of the first side X1 in the extending direction of the first band-shaped light portion 21A to the end of the second side X2 in the extending direction of the second band-shaped light portion 21B is the extension of the detected light 21. The distance L2 between both ends of the current direction X is set. Further, the maximum value of the error with respect to the set position of the stop position of the wheel 2 when the wheel 2 is stopped at the set position is set as the stop maximum error L3.

受光部１７は、第１受光体１７Ａと、この第１受光体１７Ａに対して延在方向第２側Ｘ２に設置された第２受光体１７Ｂとを備えている。第１受光体１７Ａは、第１投光体１６Ａが投光した光（ここでは第１帯状光部２１Ａ）を受光し、第２受光体１７Ｂは、第２投光体１６Ｂが投光した光（ここでは第２帯状光部２１Ｂ）を受光する。これら第１受光体１７Ａ及び第２受光体１７Ｂは、車輪２より下方側Ｚ２に位置するように第１レール部１Ａに支持されている。また、第１受光体１７Ａ及び第２受光体１７Ｂは、延在方向Ｘに並ぶ状態で同じ高さに設置されている。 The light receiving unit 17 includes a first light receiving body 17A and a second light receiving body 17B installed on the second side X2 in the extending direction with respect to the first light receiving body 17A. The first light receiving body 17A receives the light projected by the first floodlight 16A (here, the first band-shaped light portion 21A), and the second light receiving body 17B is the light projected by the second floodlight 16B. (Here, the second band-shaped light portion 21B) receives light. The first light receiving body 17A and the second light receiving body 17B are supported by the first rail portion 1A so as to be located on the lower side Z2 of the wheel 2. Further, the first light receiving body 17A and the second light receiving body 17B are installed at the same height in a state of being lined up in the extending direction X.

第１レール部１Ａにおける設定位置に対応する部分には、第１受光体１７Ａ及び第２受光体１７Ｂを設置するための設置空間Ｓが第１レール部１Ａの内部に形成されている。そして、第１受光体１７Ａ及び第２受光体１７Ｂは、走行面Ｆより下方に位置するように、設置空間Ｓに設置されている。 An installation space S for installing the first light receiving body 17A and the second light receiving body 17B is formed inside the first rail portion 1A in the portion corresponding to the set position in the first rail portion 1A. The first light receiving body 17A and the second light receiving body 17B are installed in the installation space S so as to be located below the traveling surface F.

図４及び図５に示すように、第１レール部１Ａは、上下方向Ｚに貫通する貫通孔２３を備えている。本実施形態では、第１レール部１Ａは、貫通孔２３として、第１帯状光部２１Ａに対応する位置に形成されている第１貫通部２３Ａと、第２帯状光部２１Ｂに対応する位置に形成されている第２貫通部２３Ｂと、を備えている。これら第１貫通部２３Ａ及び第２貫通部２３Ｂは、走行面Ｆから設置空間Ｓに連通するように、上下方向Ｚに貫通している。第１投光体１６Ａが投光した第１帯状光部２１Ａは、第１貫通部２３Ａを通して第１受光体１７Ａに到達する。第２投光体１６Ｂが投光した第２帯状光部２１Ｂは、第２貫通部２３Ｂを通して第２受光体１７Ｂに到達する。 As shown in FIGS. 4 and 5, the first rail portion 1A includes a through hole 23 penetrating in the vertical direction Z. In the present embodiment, the first rail portion 1A is formed as a through hole 23 at a position corresponding to the first band-shaped light portion 21A and at a position corresponding to the second band-shaped light portion 21B. It includes a second penetrating portion 23B that is formed. The first penetrating portion 23A and the second penetrating portion 23B penetrate in the vertical direction Z so as to communicate with the installation space S from the traveling surface F. The first band-shaped light portion 21A projected by the first floodlight 16A reaches the first light receiving body 17A through the first penetrating portion 23A. The second band-shaped light portion 21B projected by the second light projecting body 16B reaches the second light receiving body 17B through the second penetrating portion 23B.

第１貫通部２３Ａの延在方向Ｘの大きさは、第１帯状光部２１Ａの延在方向Ｘの大きさより大きく、且つ、第１車輪２Ａの延在方向Ｘの大きさより小さい。そして、第１貫通部２３Ａの幅方向Ｙの大きさは、第１帯状光部２１Ａの幅方向Ｙの大きさより大きく、且つ、第１車輪２Ａの幅方向Ｙの大きさより小さい。また、第２貫通部２３Ｂの延在方向Ｘの大きさは、第２帯状光部２１Ｂの延在方向Ｘの大きさより大きく、且つ、第１車輪２Ａの延在方向Ｘの大きさより小さい。また、第２貫通部２３Ｂの幅方向Ｙの大きさは、第２帯状光部２１Ｂの幅方向Ｙの大きさより大きく、且つ、第１車輪２Ａの幅方向Ｙの大きさより小さい。尚、本実施形態では、第２帯状光部２１Ｂは、第１帯状光部２１Ａと幅方向Ｙの大きさ及び延在方向Ｘの大きさが同じとなっており、第２貫通部２３Ｂは、第１貫通部２３Ａと幅方向Ｙの大きさ及び延在方向Ｘの大きさが同じとなっている。 The size of the extending direction X of the first penetrating portion 23A is larger than the size of the extending direction X of the first band-shaped light portion 21A and smaller than the size of the extending direction X of the first wheel 2A. The size of the first penetrating portion 23A in the width direction Y is larger than the size of the first band-shaped light portion 21A in the width direction Y and smaller than the size of the first wheel 2A in the width direction Y. Further, the size of the extending direction X of the second penetrating portion 23B is larger than the size of the extending direction X of the second band-shaped light portion 21B and smaller than the size of the extending direction X of the first wheel 2A. Further, the size of the second penetrating portion 23B in the width direction Y is larger than the size of the second band-shaped light portion 21B in the width direction Y and smaller than the size of the first wheel 2A in the width direction Y. In the present embodiment, the second band-shaped light portion 21B has the same size in the width direction Y and the size in the extending direction X as the first band-shaped light portion 21A, and the second penetrating portion 23B has the same size. The size of the width direction Y and the size of the extending direction X are the same as those of the first penetrating portion 23A.

計測部１９は、第１受光体１７Ａが受光した第１帯状光部２１Ａの延在方向Ｘの大きさを計測する第１計測ユニット１９Ａと、第２受光体１７Ｂが受光した第２帯状光部２１Ｂの延在方向Ｘの大きさを計測する第２計測ユニット１９Ｂと、を備えている。また、表示部２０は、第１計測ユニット１９Ａが計測した計測情報に基づいた情報を表示する第１表示ユニット２０Ａと、第２計測ユニット１９Ｂが計測した計測情報に基づいた情報を表示する第２表示ユニット２０Ｂと、を備えている。本実施形態では、第１表示ユニット２０Ａは、第１帯状光部２１Ａの延在方向Ｘの全体の大きさから第１受光体１７Ａが受光した第１帯状光部２１Ａの延在方向Ｘの大きさを引いた大きさ、すなわち、第１帯状光部２１Ａのうち第１車輪２Ａによって遮光された大きさを第１数値として表示する。また、第２表示ユニット２０Ｂは、第２帯状光部２１Ｂの延在方向Ｘの全体の大きさから第２受光体１７Ｂが受光した第２帯状光部２１Ｂの延在方向Ｘの大きさを引いた大きさ、すなわち、第２帯状光部２１Ｂのうち第１車輪２Ａによって遮光された大きさを第２数値として表示する。 The measuring unit 19 includes a first measuring unit 19A for measuring the magnitude of the extending direction X of the first band-shaped light unit 21A received by the first light receiving body 17A, and a second band-shaped light unit received by the second light receiving body 17B. It includes a second measuring unit 19B that measures the size of the extending direction X of 21B. Further, the display unit 20 displays the first display unit 20A that displays the information based on the measurement information measured by the first measurement unit 19A, and the second display unit 20 that displays the information based on the measurement information measured by the second measurement unit 19B. It is equipped with a display unit 20B. In the present embodiment, the first display unit 20A has the size of the extending direction X of the first band-shaped light portion 21A received by the first light receiving body 17A from the overall size of the extending direction X of the first band-shaped light portion 21A. The size obtained by subtracting the light, that is, the size of the first band-shaped light portion 21A shaded by the first wheel 2A is displayed as the first numerical value. Further, the second display unit 20B subtracts the size of the extending direction X of the second band-shaped light portion 21B received by the second light receiving body 17B from the overall size of the extending direction X of the second band-shaped light portion 21B. The size, that is, the size of the second band-shaped light portion 21B shaded by the first wheel 2A is displayed as the second numerical value.

本実施形態では、第１計測ユニット１９Ａと第１表示ユニット２０Ａとを備えた第１本体部２４Ａと、第２計測ユニット１９Ｂと第２表示ユニット２０Ｂとを備えた第２本体部２４Ｂとは、計測情報等の各種情報を送受信可能に接続されている。第１表示ユニット２０Ａは、第１数値を表示する状態と、第１数値に第２数値を加えた第３数値を表示する状態と、に切り換え可能に構成されている。尚、第１計測ユニット１９Ａと第１表示ユニット２０Ａとは、第１本体部２４Ａに備えられており、第２計測ユニット１９Ｂと第２表示ユニット２０Ｂとは、第２本体部２４Ｂに備えられている。 In the present embodiment, the first main body portion 24A including the first measurement unit 19A and the first display unit 20A, and the second main body portion 24B including the second measurement unit 19B and the second display unit 20B are It is connected so that various information such as measurement information can be transmitted and received. The first display unit 20A is configured to be switchable between a state of displaying a first numerical value and a state of displaying a third numerical value obtained by adding a second numerical value to the first numerical value. The first measurement unit 19A and the first display unit 20A are provided in the first main body unit 24A, and the second measurement unit 19B and the second display unit 20B are provided in the second main body unit 24B. There is.

計測部１９は、車輪２の車輪径Ｒを計測してその計測結果を示す情報を表示部２０に表示する計測表示制御を実行する。次に、計測部１９が実行する計測表示制御について図７に示すフローチャートに基づいて説明を加える。 The measurement unit 19 measures the wheel diameter R of the wheel 2 and executes measurement display control to display information indicating the measurement result on the display unit 20. Next, the measurement display control executed by the measurement unit 19 will be described based on the flowchart shown in FIG. 7.

計測部１９は、制御装置Ｈから準備完了信号を受信したこと（Ｓ１）に伴って設定位置にある車輪２の車輪径Ｒを計測する計測制御（Ｓ１）を実行する。計測制御では、受光部１７が受光した検出光２１に基づいて車輪径Ｒを計測する。本実施形態では、計測制御により車輪径Ｒの一部を計測する。具体的には、図４に示すように、計測制御により、車輪径Ｒのうちの隙間Ｌ１を除く部分の大きさである非検出長さ（基準車輪径Ｒ１－隙間Ｌ１であり、上述した第３数値に相当する長さ）を計測する。尚、制御装置Ｈは、物品搬送車３を制御するための装置であり、制御装置Ｈは、物品搬送車３の車輪２が設定位置に移動させるように物品搬送車３を制御し、車輪２が設定位置に到達したことに伴って計測部１９に向けて準備完了信号を送信する。 The measurement unit 19 executes measurement control (S1) for measuring the wheel diameter R of the wheel 2 at the set position in accordance with the reception of the preparation completion signal from the control device H (S1). In the measurement control, the wheel diameter R is measured based on the detection light 21 received by the light receiving unit 17. In this embodiment, a part of the wheel diameter R is measured by measurement control. Specifically, as shown in FIG. 4, the non-detection length (reference wheel diameter R1-gap L1 is the size of the portion of the wheel diameter R excluding the gap L1 by measurement control, which is the above-mentioned first. 3 Measure the length corresponding to the numerical value). The control device H is a device for controlling the article transport vehicle 3, and the control device H controls the article transport vehicle 3 so that the wheel 2 of the article transport vehicle 3 moves to the set position, and the wheel 2 A ready signal is transmitted to the measuring unit 19 when the wheel reaches the set position.

計測部１９は、計測制御によって計測した計測情報を表示部２０に表示する表示制御を実行する（Ｓ３）。この表示制御では、計測した車輪径Ｒの情報を表示部２０に表示させるように表示部２０を制御する。本実施形態では、第１表示ユニット２０Ａに第１数値又は第３数値を表示し、第２表示ユニット２０Ｂに第２数値を表示するように、第１表示ユニット２０Ａ及び第２表示ユニット２０Ｂを制御する。 The measurement unit 19 executes display control for displaying the measurement information measured by the measurement control on the display unit 20 (S3). In this display control, the display unit 20 is controlled so that the information on the measured wheel diameter R is displayed on the display unit 20. In the present embodiment, the first display unit 20A and the second display unit 20B are controlled so that the first numerical value or the third numerical value is displayed on the first display unit 20A and the second numerical value is displayed on the second display unit 20B. do.

計測部１９は、計測制御及び表示制御が完了するに伴って計測完了信号を制御装置Ｈに送信すると共に計測制御によって計測された計測情報を表示装置２６に送信する送信制御を実行する（Ｓ４）。表示装置２６としてパーソナルコンピュータを用いている。制御装置Ｈは、計測部１９からの計測完了信号に基づいて、車輪２を設定位置から移動させるように物品搬送車３を制御し、必要に応じて次の車輪２を設定位置に移動させる。 The measurement unit 19 executes transmission control of transmitting the measurement completion signal to the control device H and transmitting the measurement information measured by the measurement control to the display device 26 as the measurement control and the display control are completed (S4). .. A personal computer is used as the display device 26. The control device H controls the article carrier 3 so as to move the wheel 2 from the set position based on the measurement completion signal from the measurement unit 19, and moves the next wheel 2 to the set position as needed.

制御装置Ｈは、設定位置にある車輪２を備えている物品搬送車３の識別情報を表示装置２６に送信している。表示装置２６は、制御装置Ｈから送信された識別情報と、計測部１９から送信された計測情報と、に基づいて、物品搬送車３の識別情報と、当該物品搬送車３が備えている４つの車輪２の車輪径Ｒと、を関連付けて表示する。また、制御装置Ｈは、物品搬送車３の識別情報と、計測部１９から送信された計測情報に基づく物品搬送車３の４つの車輪２の車輪径Ｒと、を関連付けて記憶部２５記憶する。これらの場合において、制御装置Ｈは、車輪径Ｒの計測結果に基づいて、車輪２の交換が必要な物品搬送車３を判定するように構成されていると好適である。また制御装置Ｈが、車輪２の交換が必要と判定した物品搬送車３を規定のメンテナンスステーションへ移動させる制御を行うように構成されていても好適である。 The control device H transmits the identification information of the article carrier 3 provided with the wheels 2 at the set position to the display device 26. The display device 26 includes the identification information of the article transport vehicle 3 and the article transport vehicle 3 based on the identification information transmitted from the control device H and the measurement information transmitted from the measurement unit 19. The wheel diameter R of the two wheels 2 is displayed in association with each other. Further, the control device H stores the identification information of the article transport vehicle 3 and the wheel diameters R of the four wheels 2 of the article transport vehicle 3 based on the measurement information transmitted from the measurement unit 19 in association with each other in the storage unit 25. .. In these cases, it is preferable that the control device H is configured to determine the article carrier 3 for which the wheel 2 needs to be replaced based on the measurement result of the wheel diameter R. Further, it is also preferable that the control device H is configured to control the movement of the article transport vehicle 3, which is determined to require replacement of the wheels 2, to the specified maintenance station.

２．その他の実施形態
次に、車輪径計測装置のその他の実施形態について説明する。 2. 2. Other Embodiments Next, other embodiments of the wheel diameter measuring device will be described.

（１）上記の実施形態では、車輪２の延在方向Ｘの両端部が検出光２１の延在方向Ｘの範囲に含まれている状態で、車輪径Ｒを１回計測する構成を例として説明した。しかし、このような構成に限定されない。例えば、車輪２の延在方向Ｘの両端部が検出光２１の延在方向Ｘの範囲に含まれている状態で、車輪径Ｒを複数回計測する構成としてもよい。 (1) In the above embodiment, as an example, the wheel diameter R is measured once while both ends of the extending direction X of the wheel 2 are included in the range of the extending direction X of the detection light 21. explained. However, it is not limited to such a configuration. For example, the wheel diameter R may be measured a plurality of times in a state where both ends of the extending direction X of the wheel 2 are included in the range of the extending direction X of the detection light 21.

具体的には、次のように構成してもよい。例えば、図８に示すように、投光部１６が、第１投光体１６Ａと第２投光体１６Ｂとに加えて、第３投光体１６Ｃと第４投光体１６Ｄと第５投光体１６Ｅとを備え、受光部１７が、第１受光体１７Ａと第２受光体１７Ｂとに加えて、第３受光体１７Ｃと第４受光体１７Ｄと第５受光体１７Ｅとを備える。第３投光体１６Ｃは、第３帯状光部２１Ｃを投光し、第３受光体１７Ｃは、第３帯状光部２１Ｃを受光する。第４投光体１６Ｄは、第４帯状光部２１Ｄを投光し、第４受光体１７Ｄは、第４帯状光部２１Ｄを受光する。第５投光体１６Ｅは、第５帯状光部２１Ｅを投光し、第５受光体１７Ｅは、第５帯状光部２１Ｅを受光する。尚、第２投光体１６Ｂ、第４投光体１６Ｄ、第１投光体１６Ａ、第３投光体１６Ｃ、及び第５投光体１６Ｅは、延在方向第２側Ｘ２から延在方向第１側Ｘ１に向けて記載順に等間隔を開けて設置されている。また、第２受光体１７Ｂ、第４受光体１７Ｄ、第１受光体１７Ａ、第３受光体１７Ｃ、及び第５受光体１７Ｅは、延在方向第２側Ｘ２から延在方向第１側Ｘ１に向けて記載順に等間隔を開けて設置されている。 Specifically, it may be configured as follows. For example, as shown in FIG. 8, the floodlight unit 16 has a third floodlight 16C, a fourth floodlight 16D, and a fifth floodlight in addition to the first floodlight 16A and the second floodlight 16B. A light receiving body 16E is provided, and a light receiving unit 17 includes a third light receiving body 17C, a fourth light receiving body 17D, and a fifth light receiving body 17E in addition to the first light receiving body 17A and the second light receiving body 17B. The third floodlight 16C projects the third band-shaped light unit 21C, and the third light receiving body 17C receives the third band-shaped light unit 21C. The fourth projector 16D projects the fourth band-shaped light unit 21D, and the fourth light receiving body 17D receives the fourth band-shaped light unit 21D. The fifth projector 16E projects the fifth band-shaped light unit 21E, and the fifth light receiving body 17E receives the fifth band-shaped light unit 21E. The second floodlight 16B, the fourth floodlight 16D, the first floodlight 16A, the third floodlight 16C, and the fifth floodlight 16E extend from the second side X2 in the extension direction to the extension direction. They are installed at equal intervals toward the first side X1 in the order described. Further, the second light receiving body 17B, the fourth light receiving body 17D, the first light receiving body 17A, the third light receiving body 17C, and the fifth light receiving body 17E move from the second side X2 in the extending direction to the first side X1 in the extending direction. They are installed at equal intervals in the order in which they are written.

そして、車輪２の延在方向Ｘの両端部が第１帯状光部２１Ａ及び第２帯状光部２１Ｂの延在方向Ｘの範囲に含まれている状態と、車輪２の延在方向Ｘの両端部が第３帯状光部２１Ｃ及び第４帯状光部２１Ｄの延在方向Ｘの範囲に含まれている状態と、車輪２の延在方向Ｘの両端部が第１帯状光部２１Ａ及び第５帯状光部２１Ｅの延在方向Ｘの範囲に含まれている状態と、のそれぞれにおいて１回ずつ、合計３回、車輪径Ｒを計測する構成とすることができる。或いは、車輪２の延在方向Ｘの両端部が第１帯状光部２１Ａ及び第２帯状光部２１Ｂの延在方向Ｘの範囲に含まれている状態において、複数回、車輪径Ｒを計測する構成としてもよい。 Then, both ends of the extending direction X of the wheel 2 are included in the range of the extending direction X of the first band-shaped light portion 21A and the second band-shaped light portion 21B, and both ends of the extending direction X of the wheel 2. A state in which the portion is included in the range of the extending direction X of the third band-shaped light portion 21C and the fourth band-shaped light portion 21D, and both ends of the extending direction X of the wheel 2 are the first band-shaped light portion 21A and the fifth. The wheel diameter R can be measured three times in total, once in each of the states included in the range of the extending direction X of the band-shaped light portion 21E. Alternatively, the wheel diameter R is measured a plurality of times in a state where both ends of the extending direction X of the wheel 2 are included in the range of the extending direction X of the first band-shaped light portion 21A and the second band-shaped light portion 21B. It may be configured.

（２）上記の実施形態では、未使用の状態で車輪径Ｒが同じとなる１種類の車輪２を用いる構成を例として説明した。しかし、このような構成に限定されない。例えば、未使用の状態であっても車輪径Ｒが異なる複数種類の車輪２を用いてもよい。このような場合、車輪径計測装置の計測情報に基づいて車輪２の種類を判別するように構成してもよい。 (2) In the above embodiment, a configuration using one type of wheel 2 having the same wheel diameter R in an unused state has been described as an example. However, it is not limited to such a configuration. For example, a plurality of types of wheels 2 having different wheel diameters R may be used even in an unused state. In such a case, the type of the wheel 2 may be discriminated based on the measurement information of the wheel diameter measuring device.

（３）上記の実施形態では、検出光２１が、２つの帯状光部を備える構成を例として説明した。しかし、このような構成に限定されない。例えば、検出光２１が、１つの帯状光部で構成されてもよく、３つ以上の帯状光部を備える構成とされてもよい。これらの構成においても、検出光２１の延在方向Ｘの範囲が、延在方向Ｘに車輪２の直径分離れた２個所を含むように設定されていればよい。 (3) In the above embodiment, the configuration in which the detection light 21 includes two band-shaped light portions has been described as an example. However, it is not limited to such a configuration. For example, the detection light 21 may be composed of one band-shaped light unit or may be configured to include three or more band-shaped light units. Also in these configurations, the range of the extending direction X of the detection light 21 may be set so as to include two places where the diameters of the wheels 2 are separated in the extending direction X.

（４）上記の実施形態では、検出光２１の延在方向Ｘの両端部の距離Ｌ２を、最大車輪径Ｒ２に停止最大誤差Ｌ３を加えた長さより大きくなるように設定する構成を例として説明した。しかし、このような構成に限定されない。例えば、設定位置に車輪２を停止させた場合の誤差が停止最大誤差Ｌ３となる頻度が小さい場合等では、検出光２１の延在方向Ｘの両端部の距離Ｌ２を、最大車輪径Ｒ２に停止最大誤差Ｌ３を加えた長さより小さくなるように設定してもよい。 (4) In the above embodiment, a configuration in which the distance L2 at both ends of the extending direction X of the detection light 21 is set to be larger than the length obtained by adding the stop maximum error L3 to the maximum wheel diameter R2 will be described as an example. did. However, it is not limited to such a configuration. For example, when the frequency at which the error when the wheel 2 is stopped at the set position becomes the stop maximum error L3 is small, the distance L2 at both ends of the extending direction X of the detection light 21 is stopped at the maximum wheel diameter R2. It may be set to be smaller than the length to which the maximum error L3 is added.

（５）上記の実施形態では、レール１に上下方向Ｚに貫通する貫通孔２３を備える構成を例として説明した。しかし、このような構成に限定されない。例えば、検出光２１がレール１に干渉しない場合は、レール１に貫通孔２３を備えなくてもよい。 (5) In the above embodiment, a configuration in which the rail 1 is provided with a through hole 23 penetrating in the vertical direction Z has been described as an example. However, it is not limited to such a configuration. For example, if the detection light 21 does not interfere with the rail 1, the rail 1 may not be provided with the through hole 23.

（６）なお、上述した各実施形態で開示された構成は、矛盾が生じない限り、他の実施形態で開示された構成と組み合わせて適用することも可能である。その他の構成に関しても、本明細書において開示された実施形態は全ての点で単なる例示に過ぎない。従って、本開示の趣旨を逸脱しない範囲内で、適宜、種々の改変を行うことが可能である。 (6) The configurations disclosed in each of the above-described embodiments can be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction. With respect to other configurations, the embodiments disclosed herein are merely exemplary in all respects. Therefore, various modifications can be appropriately made without departing from the spirit of the present disclosure.

３．上記実施形態の概要
以下、上記において説明した車輪径計測装置の概要について説明する。 3. 3. Outline of the above-described embodiment The outline of the wheel diameter measuring device described above will be described below.

車輪径計測装置は、レールの走行面上を転動する車輪の径を計測する車輪径計測装置において、投光部と受光部とを有する光センサと、前記車輪の径方向の寸法である車輪径を計測する計測部と、を備え、前記投光部と前記受光部とは、前記車輪の走行軌跡を挟んで上下方向に分かれて設置され、前記投光部は、前記レールの延在方向に沿う幅を有する帯状の検出光を投光するように構成され、前記検出光の前記延在方向の範囲が、前記延在方向に前記車輪の直径分離れた２個所を含むように設定され、前記計測部は、前記受光部が受光した前記検出光に基づいて前記車輪径を計測する。 The wheel diameter measuring device is a wheel diameter measuring device that measures the diameter of a wheel that rolls on the traveling surface of a rail, and is an optical sensor having a light emitting portion and a light receiving portion, and a wheel that is a dimension in the radial direction of the wheel. A measuring unit for measuring the diameter is provided, and the light emitting unit and the light receiving unit are separately installed in the vertical direction with the traveling locus of the wheel interposed therebetween, and the light emitting unit is installed in the extending direction of the rail. It is configured to emit a band-shaped detection light having a width along the The measuring unit measures the wheel diameter based on the detected light received by the light receiving unit.

本構成によれば、投光部と受光部とが車輪の走行軌跡を挟んで上下方向に分かれて設置されているため、投光部及び受光部に対して車輪が延在方向に移動したとしても、車輪が投光部又は受光部に干渉することを回避できる。そして、検出光の延在方向の範囲内に車輪が位置した状態で、計測部によってその車輪の車輪径を計測できるため、車輪に対して固定された位置に光センサを配置する必要がない。また、検出光は延在方向に幅を有する帯状とされており、延在方向に広がりを有する範囲で車輪径を計測できるため、車輪径を計測することが可能な車輪の位置の制約が少ない。従って、車輪径を計測する場合における、車輪の動作状態の制約を少なくすることができる。 According to this configuration, since the light emitting part and the light receiving part are separately installed in the vertical direction with the traveling locus of the wheel in between, it is assumed that the wheel moves in the extending direction with respect to the light emitting part and the light receiving part. Also, it is possible to prevent the wheels from interfering with the light emitting portion or the light receiving portion. Then, since the wheel diameter of the wheel can be measured by the measuring unit in a state where the wheel is located within the range in the extending direction of the detected light, it is not necessary to arrange the optical sensor at a position fixed to the wheel. In addition, the detected light has a band shape having a width in the extending direction, and the wheel diameter can be measured within a range having a spread in the extending direction, so that there are few restrictions on the position of the wheel capable of measuring the wheel diameter. .. Therefore, it is possible to reduce restrictions on the operating state of the wheel when measuring the wheel diameter.

ここで、前記車輪の径方向の寸法を車輪径とし、計測対象の前記車輪の中で最も小さい前記車輪径を最小車輪径として、前記検出光は、前記延在方向に前記最小車輪径より狭い隙間を開けて離間した２本の帯状光部を備えていると好適である。 Here, the radial dimension of the wheel is the wheel diameter, the smallest wheel diameter among the wheels to be measured is the minimum wheel diameter, and the detected light is narrower than the minimum wheel diameter in the extending direction. It is preferable to have two strip-shaped light portions separated by a gap.

本構成によれば、検出光を２本の帯状光部として延在方向に離間させることになるため、検出光を１本の幅広の帯状光とする場合に比べて、投光部や受光部の延在方向の幅を小さくすることができ、光センサの小型化を図ることができる。また、２本の帯状光部の離間距離は最小車輪径より狭いため、計測対象の車輪の車輪径が最小車輪径であったとしても当該車輪の車輪径も計測部によって適切に計測することができる。 According to this configuration, since the detected light is separated in the extending direction as two strip-shaped light portions, the light projecting portion and the light receiving portion are compared with the case where the detected light is one wide strip-shaped light. The width in the extending direction can be reduced, and the optical sensor can be miniaturized. Further, since the separation distance between the two strip-shaped light portions is narrower than the minimum wheel diameter, even if the wheel diameter of the wheel to be measured is the minimum wheel diameter, the wheel diameter of the wheel can be appropriately measured by the measuring unit. can.

また、計測対象の前記車輪の中で最も大きい前記車輪径を最大車輪径とし、前記車輪を設定位置に停止させる場合における前記車輪の停止位置の前記設定位置に対する誤差の最大値を停止最大誤差として、前記検出光の前記延在方向の両端間の距離が、前記最大車輪径に前記停止最大誤差を加えた長さより大きくなるように設定されていると好適である。 Further, the largest wheel diameter among the wheels to be measured is set as the maximum wheel diameter, and the maximum value of the error of the stop position of the wheel with respect to the set position when the wheel is stopped at the set position is set as the stop maximum error. It is preferable that the distance between both ends of the detected light in the extending direction is set to be larger than the length obtained by adding the maximum stop error to the maximum wheel diameter.

車輪を設定位置に停止させて計測部による計測を行う場合において、車輪の停止位置が設定位置に対して延在方向にずれる場合がある。本構成によれば、検出光の延在方向の両端間の距離が、最大車輪径に停止最大誤差を加えた長さより大きい。そのため、上述の如く車輪の停止位置が設定位置に対して延在方向にずれた場合でも、車輪における延在方向の両端部が検出光の延在方向の範囲に含まれるようにでき、計測部によって車輪の車輪径を計測することができる。 When the wheel is stopped at the set position and the measurement is performed by the measuring unit, the stop position of the wheel may shift in the extending direction with respect to the set position. According to this configuration, the distance between both ends in the extending direction of the detected light is larger than the length obtained by adding the maximum stop error to the maximum wheel diameter. Therefore, even if the stop position of the wheel deviates from the set position in the extending direction as described above, both ends of the extending direction of the wheel can be included in the range of the extending direction of the detected light, and the measuring unit can be used. The wheel diameter of the wheel can be measured by.

また、前記上下方向に沿う上下方向視で前記延在方向に対して直交する方向を幅方向として、前記レールに、前記上下方向に貫通する貫通孔が備えられ、前記貫通孔の前記幅方向の大きさは、前記車輪の前記幅方向の大きさより小さいと好適である。 Further, the rail is provided with a through hole penetrating in the vertical direction with the direction orthogonal to the extending direction as the width direction in the vertical direction along the vertical direction, and the through hole is provided in the width direction of the through hole. It is preferable that the size is smaller than the size of the wheel in the width direction.

本構成によれば、レールに貫通孔を備えることで、投光部又は受光部の一方をレールの走行面より下方に設置したとしても、貫通孔を通して車輪に対して上方に設置した投光部又は受光部の他方との間で検出光を投受光することが可能となる。そのため、投光部や受光部を、車輪やその周辺に備えられている部材に干渉し難いように設置し易い。また、貫通孔の幅方向の大きさは、車輪の幅方向の大きさより小さいため、貫通孔の存在が車輪の転動に与える影響を小さく抑えることができる。 According to this configuration, by providing the rail with a through hole, even if one of the light emitting part and the light receiving part is installed below the traveling surface of the rail, the light emitting part installed above the wheel through the through hole. Alternatively, the detected light can be transmitted and received between the light receiving unit and the other side of the light receiving unit. Therefore, it is easy to install the light projecting unit and the light receiving unit so as not to interfere with the members provided on the wheel and its surroundings. Further, since the size of the through hole in the width direction is smaller than the size in the width direction of the wheel, the influence of the presence of the through hole on the rolling of the wheel can be suppressed to a small extent.

また、前記投光部は、前記延在方向に対して直交する方向に沿って前記検出光を投光するように設置されていると好適である。 Further, it is preferable that the light projecting unit is installed so as to project the detected light along a direction orthogonal to the extending direction.

本構成によれば、投光部と受光部とを延在方向において同じ位置に設置することができるため、投光部と受光部とを延在方向にずらした状態で設置する場合に比べて、延在方向における光センサの設置範囲を小さく抑えることができる。従って、本構成によれば、車輪径計測装置の小型化を図り易い。 According to this configuration, since the light projecting unit and the light receiving unit can be installed at the same position in the extending direction, the light emitting unit and the light receiving unit can be installed in a state of being shifted in the extending direction. , The installation range of the optical sensor in the extending direction can be kept small. Therefore, according to this configuration, it is easy to reduce the size of the wheel diameter measuring device.

また、前記計測部は、前記車輪の前記延在方向の両端部が前記検出光の前記延在方向の範囲に含まれている状態で、前記車輪径を複数回計測すると好適である。 Further, it is preferable that the measuring unit measures the wheel diameter a plurality of times in a state where both ends of the wheel in the extending direction are included in the range of the detection light in the extending direction.

本構成によれば、車輪が検出光の延在方向の範囲内を一度通過する間に、計測部によって車輪径の情報を複数回取得することができる。このように車輪径の情報を複数回取得することで、複数の車輪径の情報から平均値や中央値を演算する等により、より高い精度の車輪径の情報を取得し易くなる。またこの際、車輪を転動させながら車輪径を複数回計測した場合には、車輪に偏摩耗が生じている場合等にも車輪の平均的な車輪径を取得することが可能となるため、偏摩耗等の影響が小さい高精度な車輪径を取得することが可能となる。 According to this configuration, the information on the wheel diameter can be acquired a plurality of times by the measuring unit while the wheel passes once within the range in the extending direction of the detected light. By acquiring the wheel diameter information a plurality of times in this way, it becomes easier to acquire more accurate wheel diameter information by calculating an average value or a median value from the information of the plurality of wheel diameters. At this time, when the wheel diameter is measured a plurality of times while rolling the wheel, it is possible to obtain the average wheel diameter of the wheel even when the wheel is unevenly worn. It is possible to obtain a highly accurate wheel diameter that is less affected by uneven wear and the like.

本開示に係る技術は、レールの走行面上を転動する車輪の径を計測する車輪径計測装置に利用することができる。 The technique according to the present disclosure can be used for a wheel diameter measuring device that measures the diameter of a wheel rolling on a running surface of a rail.

１：レール
２：車輪
４：車輪径計測装置
１６：投光部
１７：受光部
１８：光センサ
１９：計測部
２１：検出光
２１Ａ：第１帯状光部（帯状光部）
２１Ｂ：第２帯状光部（帯状光部）
２１Ｃ：第３帯状光部（帯状光部）
２１Ｄ：第４帯状光部（帯状光部）
２１Ｅ：第５帯状光部（帯状光部）
２３：貫通孔
Ｆ：走行面
Ｌ１：隙間
Ｌ２：両端間の距離
Ｌ３：停止最大誤差
Ｒ：車輪径
Ｒ２：最大車輪径
Ｒ３：最小車輪径
Ｔ：走行軌跡
Ｘ：延在方向
Ｙ：幅方向
Ｚ：上下方向 1: Rail 2: Wheel 4: Wheel diameter measuring device 16: Light projecting unit 17: Light receiving unit 18: Optical sensor 19: Measuring unit 21: Detection light 21A: First band-shaped light unit (band-shaped light unit)
21B: Second band-shaped light part (band-shaped light part)
21C: Third band-shaped light part (band-shaped light part)
21D: 4th band-shaped light part (band-shaped light part)
21E: Fifth band-shaped light part (band-shaped light part)
23: Through hole F: Travel surface L1: Gap L2: Distance between both ends L3: Maximum stop error R: Wheel diameter R2: Maximum wheel diameter R3: Minimum wheel diameter T: Travel locus X: Extension direction Y: Width direction Z :vertical direction

Claims

A wheel diameter measuring device that measures the diameter of wheels rolling on the running surface of a rail.
It is provided with an optical sensor having a light projecting unit and a light receiving unit, and a measuring unit for measuring the wheel diameter, which is a radial dimension of the wheel.
The light projecting unit and the light receiving unit are separately installed in the vertical direction with the traveling locus of the wheel interposed therebetween.
The light projecting unit is configured to project a band-shaped detection light having a width along the extending direction of the rail.
The range of the detection light in the extension direction is set to include two diameter-separated points of the wheel in the extension direction.
The measuring unit is a wheel diameter measuring device that measures the wheel diameter based on the detected light received by the light receiving unit.

The radial dimension of the wheel is defined as the wheel diameter.
The smallest wheel diameter among the wheels to be measured is set as the minimum wheel diameter.
The wheel diameter measuring device according to claim 1, wherein the detected light includes two strip-shaped light portions separated by a gap narrower than the minimum wheel diameter in the extending direction.

The largest wheel diameter among the wheels to be measured is set as the maximum wheel diameter.
The maximum value of the error of the stop position of the wheel with respect to the set position when the wheel is stopped at the set position is defined as the maximum stop error.
The wheel diameter measuring device according to claim 1 or 2, wherein the distance between both ends of the detection light in the extending direction is set to be larger than the length obtained by adding the stop maximum error to the maximum wheel diameter. ..

The width direction is the direction orthogonal to the extension direction in the vertical view along the vertical direction.
The rail is provided with a through hole that penetrates in the vertical direction.
The wheel diameter measuring device according to any one of claims 1 to 3, wherein the size of the through hole in the width direction is smaller than the size of the wheel in the width direction.

The wheel diameter measuring device according to any one of claims 1 to 4, wherein the light projecting unit is installed so as to project the detected light along a direction orthogonal to the extending direction. ..

Any of claims 1 to 5, wherein the measuring unit measures the wheel diameter a plurality of times in a state where both ends of the wheel in the extending direction are included in the range of the detection light in the extending direction. The wheel diameter measuring device according to item 1.