JP6537361B2 - Mobile communication marker - Google Patents
Mobile communication marker Download PDFInfo
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- JP6537361B2 JP6537361B2 JP2015123175A JP2015123175A JP6537361B2 JP 6537361 B2 JP6537361 B2 JP 6537361B2 JP 2015123175 A JP2015123175 A JP 2015123175A JP 2015123175 A JP2015123175 A JP 2015123175A JP 6537361 B2 JP6537361 B2 JP 6537361B2
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- mobile communication
- marker
- fastening body
- housing
- linear expansion
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- 238000010295 mobile communication Methods 0.000 title claims description 97
- 239000003550 marker Substances 0.000 title claims description 94
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 10
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 4
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 230000006903 response to temperature Effects 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 description 14
- 238000004891 communication Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 8
- 239000007769 metal material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000012783 reinforcing fiber Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0204—Mounting supporting structures on the outside of casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
- H05K5/0234—Feet; Stands; Pedestals, e.g. wheels for moving casing on floor
Description
本発明は、移動体と無線通信する際に用いられる移動体通信用マーカーに関し、特に締結体により地上に固定される移動体通信用マーカーに適用して好適なものである。 The present invention relates to a mobile communication marker used in wireless communication with a mobile body, and is particularly suitable for application to a mobile communication marker fixed on the ground by a fastening body.
移動体通信用マーカーは、例えば締結体により地上に固定され、自動車等の移動体と無線通信する際に用いられる。移動体通信用マーカーは、通信用の電子部品が搭載された電子基板と、この電子基板を固定する樹脂製の筐体とから構成される。また筐体は、締結補助用の金属材を有して構成される。この締結補助用の金属材と、地上に予め設置されている台座とをボルト等の締結体で締結することで、締結体の軸力（締結力）により、移動体通信用マーカーを地上に固定することができる。 The mobile communication marker is fixed on the ground by, for example, a fastening body, and is used in wireless communication with a mobile object such as a car. The mobile communication marker is composed of an electronic substrate on which electronic components for communication are mounted, and a resin case for fixing the electronic substrate. In addition, the housing is configured to have a metal material for fastening assistance. The mobile communication marker is fixed on the ground by the axial force (fastening force) of the fastening body by fastening the metal material for fastening assistance and the pedestal previously installed on the ground with a fastening body such as a bolt. can do.
ところで筐体の金属材は、筐体の樹脂成型時に一体固定される。このとき金属材と樹脂界面との密着力が小さいと、接着面のはく離が生じ、移動体通信用マーカーを地上（台座）に十分に固定することができない場合がある。さらに金属材を用いることで製造コストが高くなる。そこで特許文献１には、金属材を廃止して、樹脂製の筐体をボルトで直接締結する構造が開示されている。この構造によれば、製造コストを抑えて、移動体通信用マーカーを地上に安定的に固定することができるとしている。 By the way, the metal material of the case is integrally fixed at the time of resin molding of the case. At this time, if the adhesion between the metal material and the resin interface is small, peeling of the adhesive surface may occur and the mobile communication marker may not be sufficiently fixed to the ground (base). Further, the use of a metal material increases the manufacturing cost. Therefore, Patent Document 1 discloses a structure in which a metal case is eliminated and a resin case is directly fastened with a bolt. According to this structure, it is possible to stably fix the mobile communication marker on the ground while suppressing the manufacturing cost.
しかし特許文献１に記載の技術では、移動体通信用マーカーを地上に固定してから長時間経過すると、ボルトの軸力が低下し、このボルトの軸力が低下した状態で移動体通信用マーカー上を移動体が通過すると、移動体通信用マーカーが振動してボルトに緩みが生じる。よって長時間、移動体通信用マーカーを安定的に固定することができないという課題がある。 However, in the technology described in Patent Document 1, when a long time has passed since the mobile communication marker was fixed on the ground, the axial force of the bolt decreases, and the mobile communication marker with the axial force of the bolt decreased. When the mobile passes above, the mobile communication marker vibrates and the bolt is loosened. Therefore, there is a problem that the mobile communication marker can not be stably fixed for a long time.
なお、金属材のような締結補助体を用いずに樹脂をボルトで直接締結すると、樹脂の応力緩和によって時間経過とともにボルトの軸力は低下する。特許文献１には、ボルトの接触面積、温度、樹脂及びボルトの線膨張係数等から得られる条件式を満足するように締結することで、一定時間（例えば１０００時間）経過後も軸力を維持することができるとしているが、長時間経過後（例えば１年後）の軸力は非常に小さくなる。この場合、残存軸力が振動に対して緩みを防止可能な軸力を下回り、移動体が通過した際の振動によってボルトに緩みが生じる。 When the resin is directly fastened with a bolt without using a fastening aid such as a metal material, the axial force of the bolt decreases with time due to the stress relaxation of the resin. In Patent Document 1, axial force is maintained even after a predetermined time (for example, 1000 hours) elapses by fastening so as to satisfy a conditional expression obtained from the contact area of bolt, temperature, resin and linear expansion coefficient of bolt, etc. Although it can be done, the axial force after a long time (for example, one year later) becomes very small. In this case, the residual axial force is smaller than the axial force which can prevent the looseness with respect to vibration, and the bolt is loosened due to the vibration when the moving body passes.
本発明は以上の点を考慮してなされたものであり、締結してから長時間経過した後であっても、締結体の軸力を保持して緩みを防止し、移動体通信用マーカーを安定的に固定し得る移動体通信用マーカーを提案するものである。 The present invention has been made in consideration of the above points, and holds the axial force of the fastening body to prevent loosening even after a long time has passed since fastening, thereby preventing the marker for mobile communication. A marker for mobile communication that can be stably fixed is proposed.
かかる課題を解決するために、本発明においては、移動体通信用マーカーであって、電子基板を内部に備える筐体と、筐体を支持する台座と、筐体と台座とを締結する締結体とを備え、筐体は、温度変動に応じて膨張又は収縮する樹脂により成型され、締結体は、筐体の線膨張係数と略同一の線膨張係数を有し、前記締結体の本数をＮ［本］、前記筐体の降伏応力をσ ｙ ［ＭＰａ］、前記移動体通信用マーカーの質量をｍ［ｋｇ］、前記締結体の軸力低下係数をＫ、前記移動体通信用マーカーに掛かる加速度をａ［ｍ／ｓ ２ ］、前記筐体と前記締結体との接触面積及び前記筐体と前記台座との接触面積の合計の面積をＡ［ｍｍ ２ ］としたとき、前記合計の面積Ａは、Ａ＞（ｍａ）／ＮＫσ ｙ を満たしていることを特徴とする。
In order to solve such a problem, the fastening in the present invention, there is provided a mobile communication markers, for fastening a housing comprising electronic substrate therein, a base for supporting the housing, the housing and the pedestal The casing is molded of a resin that expands or contracts in response to temperature fluctuations, and the fastening body has a linear expansion coefficient substantially the same as the linear expansion coefficient of the casing, and the number of fastening bodies is N [number], yield stress of the casing is σ y [MPa], mass of the mobile communication marker is m [kg], axial force reduction coefficient of the fastening body is K, the mobile communication marker the applied acceleration a [m / s 2], the total area of the contact area between the contact area and the housing and the base of the housing and the fastening member when the a [mm 2], the total The area A is characterized by satisfying A> (ma) / NKσ y .
本発明によれば、締結してから長時間経過した後であっても、締結体の軸力を保持して緩みを防止し、移動体通信用マーカーを安定的に固定することができる。 According to the present invention, even after a long time has passed since fastening, the axial force of the fastening body can be held to prevent looseness, and the mobile communication marker can be stably fixed.
（１）全体構成
図１及び図２を参照して、移動体通信用マーカー１の概略構成について説明する。
図１は、移動体通信用マーカー１の上面構成を示し、また図２は、移動体通信用マーカー１と移動体９との間で行われる無線通信１１の模式図を示す。
(1) Overall Configuration The schematic configuration of the mobile communication marker 1 will be described with reference to FIGS. 1 and 2.
FIG. 1 shows a top view of the mobile communication marker 1 and FIG. 2 shows a schematic view of the wireless communication 11 performed between the mobile communication marker 1 and the mobile 9.
移動体通信用マーカー１は、締結体２により路面３上に固定される。締結体２は、例えば、ステンレス等の金属製ボルトである。自動車等の移動体９は、路面３上を走行する。移動体９が移動体通信用マーカー１上を通過すると、この通過タイミングで、移動体９が備えるアンテナ１０と、路面３上に固定されている移動体通信用マーカー１とが無線通信１１を行う。 The mobile communication marker 1 is fixed on the road surface 3 by the fastening body 2. The fastening body 2 is, for example, a bolt made of metal such as stainless steel. A mobile body 9 such as a car travels on the road surface 3. When the mobile unit 9 passes over the mobile communication marker 1, the antenna 10 provided in the mobile unit 9 and the mobile communication marker 1 fixed on the road surface 3 perform wireless communication 11 at this passage timing. .
例えば移動体通信用マーカー１が有料道路の路面３上に固定されている場合、移動体通信用マーカー１は、移動体９（アンテナ１０）から車種や流入料金所の情報を受信する。そして移動体通信用マーカー１は、これらの情報に基づいて通行料金情報を算出し、移動体９に送信する。移動体９が備える車載器（図示省略）は、受信した通行料金情報を音声又は画像によりドライバーに通知する。 For example, when the mobile communication marker 1 is fixed on the road surface 3 of the toll road, the mobile communication marker 1 receives the information of the vehicle type and the inflow toll gate from the mobile object 9 (antenna 10). Then, the mobile communication marker 1 calculates toll information based on these pieces of information, and transmits the toll information to the mobile 9. An on-vehicle unit (not shown) included in the mobile unit 9 notifies the driver of the received toll information by voice or image.
また移動体通信用マーカー１は、走行区間の制限速度情報を移動体９に送信するとしてもよい。この場合、移動体９は車載器により、制限速度と、現在速度とを比較照合し、現在速度が制限速度を超えている場合には音声情報を生成して、ドライバーに注意喚起することができる。 The mobile communication marker 1 may transmit speed limit information of the traveling section to the mobile 9. In this case, the mobile unit 9 can compare and collate the speed limit with the current speed by the on-vehicle unit, and if the current speed exceeds the speed limit, it can generate voice information and alert the driver. .
このように移動体通信用マーカー１における無線通信１１は、金銭授受や安全性向上に用いられることが多いため、高い信頼性が必要となる。なおここでは移動体通信用マーカー１は、路面３上に固定されるとしているが、これに限らず、例えば他の地上、壁面又は天井等に固定されるとしてもよい。 As described above, since the wireless communication 11 in the mobile communication marker 1 is often used for money transfer and safety improvement, high reliability is required. Here, the mobile communication marker 1 is fixed on the road surface 3. However, the present invention is not limited to this. For example, the mobile communication marker 1 may be fixed to another ground, a wall or a ceiling.
（２）断面構成
図３は、移動体通信用マーカー１の断面構成を示す。具体的には図１のＡ−Ａ断面構成を示す。移動体通信用マーカー１は、トレイ６に電子基板７を配置し、電子基板７を保護するために充填材８で封止し、更に筐体５を上方から被せて作製される。なお電子基板７上には無線通信用の電子部品が配置される。
(2) Cross-Sectional Configuration FIG. 3 shows the cross-sectional configuration of the mobile communication marker 1. Specifically, an AA cross-sectional configuration of FIG. 1 is shown. The mobile communication marker 1 is manufactured by disposing the electronic substrate 7 on the tray 6, sealing the electronic substrate 7 with the filler 8 to protect the electronic substrate 7, and covering the housing 5 from above. Electronic components for wireless communication are disposed on the electronic substrate 7.
そして移動体通信用マーカー１は、締結体２を用いて、路面３上に予め固定されている台座４に直接締結されて固定される。締結体２である金属製のボルトに軸力を印加することで移動体通信用マーカー１を地上に固定することができる。 And the marker 1 for mobile communication is directly fastened and fixed to the base 4 previously fixed on the road surface 3 using the fastening body 2. The mobile communication marker 1 can be fixed on the ground by applying an axial force to the metal bolt which is the fastening body 2.
トレイ６及び筐体５は樹脂で作製される。樹脂は、例えば強化繊維入りプラスチック（FRP : Fiber Reinforced Plastics）である。ＦＲＰにはガラス繊維又は炭素繊維が含まれる。また充填材８は、例えばポッティング樹脂やポリウレタン樹脂である。充填材８は、図３に示すように部分的に封止しても、全体的に充填するように封止してもよい。 The tray 6 and the housing 5 are made of resin. The resin is, for example, plastic (FRP: Fiber Reinforced Plastics). FRP contains glass fiber or carbon fiber. The filler 8 is, for example, a potting resin or a polyurethane resin. The filling material 8 may be partially sealed as shown in FIG. 3 or may be sealed so as to be completely filled.
本実施の形態においては、移動体通信用マーカー１を締結体２で台座４に直接締結している。そのため締結体２による締結を補助するための金属材を移動体通信用マーカー１に接着する必要がなく、製造コストを抑制することができる。 In the present embodiment, the mobile communication marker 1 is directly fastened to the pedestal 4 by the fastening body 2. Therefore, it is not necessary to adhere the metal material for assisting the fastening by the fastening body 2 to the mobile communication marker 1, and the manufacturing cost can be suppressed.
更に本実施の形態においては、筐体５の線膨張係数と、締結体２の線膨張係数とが略同一となるようにして移動体通信用マーカー１を作製するようにしている。この詳細については後述するが、筐体５と、筐体５に接触する締結体２との線膨張係数を略同一とすることにより、温度変動に伴い締結体２の軸力が低下することを防止することができる。よって軸力低下に伴い生じる締結体２の緩みを防止することができる。筐体５の線膨張係数と締結体２の線膨張係数との略同一とは、締結体２の線膨張係数が筐体５の線膨張係数に基づいて設定されたものであればよく、両者が完全同一である場合、又は、締結体の軸力を保持して緩みを防止し、移動体通信用マーカーを安定的に固定し得るという観点から、両者が同一性の範囲にあることを含み、例えば、前記筐体の線膨張係数（αＲ）と前記締結体の線膨張係数（αＢ）との比（αＲ／αＢ）が０．８０≦（αＲ／αＢ）≦１．２０にあることを含む。 Furthermore, in the present embodiment, the mobile communication marker 1 is manufactured such that the linear expansion coefficient of the housing 5 and the linear expansion coefficient of the fastening body 2 are substantially the same. Although the details will be described later, by making the linear expansion coefficients of the casing 5 and the fastening body 2 in contact with the casing 5 substantially the same, the axial force of the fastening body 2 is lowered with temperature fluctuation. It can be prevented. Therefore, loosening of the fastening body 2 which accompanies a reduction in axial force can be prevented. The linear expansion coefficient of the housing 5 and the linear expansion coefficient of the fastening body 2 may be the same as long as the linear expansion coefficient of the fastening body 2 is set based on the linear expansion coefficient of the housing 5, both Are identical, or from the viewpoint of holding the axial force of the fastening body to prevent loosening and stably fixing the mobile communication marker, both are in the same range of identity. For example, the ratio (αR / αB) of the linear expansion coefficient (αR) of the housing to the linear expansion coefficient (αB) of the fastening body is in the range of 0.80 ≦ (αR / αB) ≦ 1.20. Including.
（３）軸力保持時間と軸力保持率との関係
図４〜図６を参照して、軸力保持時間と軸力保持率との関係について説明する。
図４は、筐体５の線膨張係数αＲと、締結体２の線膨張係数αＢとが略同一である場合において、移動体通信用マーカー１を締結体２により台座４に直接固定した後の締結体２の軸力保持時間と、軸力保持率との関係を示す。
(3) Relationship Between Axial Force Holding Time and Axial Force Holding Ratio With reference to FIGS. 4 to 6, the relationship between the axial force holding time and the axial force holding ratio will be described.
In FIG. 4, when the linear expansion coefficient α R of the housing 5 and the linear expansion coefficient α B of the fastening body 2 are substantially the same, the mobile communication marker 1 is directly fixed to the pedestal 4 by the fastening body 2 The relationship between the axial force retention time of the later fastening body 2 and an axial force retention is shown.
図４に示すように締結体２の軸力は、時間経過とともに低下するが、緩み発生軸力Ｘよりも高い軸力が保持される。移動体９が移動体通信用マーカー１を通過して、移動体通信用マーカー１が振動する場合であっても、締結体２の軸力が緩み発生軸力Ｘよりも高いため、締結体２の緩みが生じることはない。よってこの場合、締結から長時間経過した後であっても、締結体２の軸力を保持して緩みを防止することができる。 As shown in FIG. 4, the axial force of the fastening body 2 decreases with the passage of time, but an axial force higher than the loosening generation axial force X is maintained. Even when the mobile unit 9 passes the mobile unit communication marker 1 and the mobile unit communication marker 1 vibrates, the axial force of the fastener 2 is higher than the loosening generation axial force X, so the fastener 2 There is no loosening of the Therefore, in this case, even after a long time has passed from the fastening, the axial force of the fastening body 2 can be held to prevent the loosening.
図５及び図６は、温度変動が生じた場合における軸力保持時間と、軸力保持率との関係を示す。また比較例として、筐体５の線膨張係数αＲと、締結体２の線膨張係数αＢとが略同一でない場合の軸力保持時間と、軸力保持率との関係を示す。移動体通信用マーカー１は、屋外に設定される場合がほとんどであるため、昼夜或いは季節の変化により温度変動を受ける。 5 and 6 show the relationship between the axial force holding time and the axial force holding ratio when temperature fluctuations occur. In addition, as a comparative example, showing a linear expansion coefficient alpha R of the housing 5, and bolt-load retention times for the linear expansion coefficient alpha B of the fastening member 2 is not substantially the same, the relationship between the axial force retention rate. Since the mobile communication marker 1 is mostly set outdoors, it is subject to temperature fluctuations due to changes in day or night or season.
まず図５について説明すると、図５には温度が上昇した場合において、（筐体５の線膨張係数αＲ）≒（締結体２の線膨張係数αＢ）である場合の軸力保持時間と、軸力保持率との関係を示す。また比較例として、（筐体５の線膨張係数αＲ）＜＜（締結体２の線膨張係数αＢ）である場合の軸力保持時間と、軸力保持率との関係を示す。 First, FIG. 5 will be described. In FIG. 5, the axial force holding time in the case where (linear expansion coefficient α R of housing 5) ≒ (linear expansion coefficient α B of fastening body 2) when temperature rises , Shows the relationship with the axial force retention. Further, as a comparative example, the relationship between the axial force holding time and the axial force retention ratio in the case of (linear expansion coefficient α R of housing 5) << (linear expansion coefficient α B of fastening body 2) is shown.
図５に示すように（筐体５の線膨張係数αＲ）≒（締結体２の線膨張係数αＢ）である場合には、温度が上昇しても温度上昇に伴う締結体２の軸力に影響はなく、締結体２の軸力は、緩み発生軸力Ｘよりも高い軸力が保持される。よってこの場合、締結から長時間経過した後であっても、締結体２の軸力を保持して緩みを防止することができる。 As shown in FIG. 5, when (linear expansion coefficient α R of housing 5) ≒ (linear expansion coefficient α B of fastening member 2), the axis of the fastening member 2 accompanying temperature rise even if the temperature rises There is no influence on the force, and the axial force of the fastening body 2 is kept higher than the loosening generated axial force X. Therefore, in this case, even after a long time has passed from the fastening, the axial force of the fastening body 2 can be held to prevent the loosening.
これに対し、（筐体５の線膨張係数αＲ）＜＜（締結体２の線膨張係数αＢ）である場合、温度が上昇すると、締結体２は軸力付勢方向（台座４に対して垂直方向）に膨張し、筐体５も同方向に膨張するが、この締結体２の軸力付勢方向の膨張量が筐体５の同方向の膨張量よりも大きいため軸力が低下し、緩み発生軸力を下回るまでの軸力保持時間が短くなる。 On the other hand, in the case of (linear expansion coefficient α R of housing 5) << (linear expansion coefficient α B of fastening member 2), when temperature rises, the fastening member 2 is biased in the axial force direction (base 4 The casing 5 also expands in the same direction, but the amount of expansion of the fastening body 2 in the axial direction is larger than the amount of expansion of the case 5 in the same direction. The axial force holding time until it falls and becomes less than the slack generation axial force becomes short.
よって締結してから長時間経過している場合には、締結体２の軸力は、緩み発生軸力Ｘよりも低い軸力になる。この場合、締結してから長時間経過した後に移動体通信用マーカー１が振動すると、締結体２は振動の影響を受けて緩み、移動体通信用マーカー１を安定的に固定することができない。 Therefore, when a long time has passed since the fastening, the axial force of the fastening body 2 becomes an axial force lower than the loosening generation axial force X. In this case, when the mobile communication marker 1 vibrates after a long time since fastening, the fastening body 2 is loosened under the influence of the vibration, and the mobile communication marker 1 can not be stably fixed.
次いで図６について説明する。図６には温度が上昇した場合において、（筐体５の線膨張係数αＲ）≒（締結体２の線膨張係数αＢ）である場合の軸力保持時間と、軸力保持率との関係を示す。また比較例として、（筐体５の線膨張係数αＲ）＞＞（締結体２の線膨張係数αＢ）である場合の軸力保持時間と、軸力保持率との関係を示す。 Next, FIG. 6 will be described. In FIG. 6, when the temperature rises, the axial force holding time and the axial force retention rate when (the linear expansion coefficient α R of the housing 5) ≒ (the linear expansion coefficient α B of the fastening body 2) Show the relationship. Further, as a comparative example, the relationship between the axial force holding time and the axial force retention in the case of (linear expansion coefficient α R of housing 5) >> (linear expansion coefficient α B of fastening body 2) is shown.
（筐体５の線膨張係数αＲ）≒（締結体２の線膨張係数αＢ）である場合には、上記説明した通り、温度が上昇しても温度上昇に伴う締結体２の軸力に影響はない。よって締結から長時間経過した後であっても、締結体２の軸力を保持して緩みを防止することができる。 If (the linear expansion coefficient α R of the housing 5) 線 (the linear expansion coefficient α B of the fastening body 2), as described above, the axial force of the fastening body 2 accompanying the temperature rise even if the temperature rises There is no impact on Therefore, even after a long time has passed from the fastening, the axial force of the fastening body 2 can be held to prevent the loosening.
これに対し、（筐体５の線膨張係数αＲ）＞＞（締結体２の線膨張係数αＢ）である場合、温度が上昇すると、締結体２は軸力付勢方向（台座４に対して垂直方向）に膨張し、筐体５も同方向に膨張する。このとき締結体２の軸力付勢方向の膨張量が筐体５の同方向の膨張量よりも小さいため、一旦は軸力が上昇する。 On the other hand, in the case of (linear expansion coefficient α R of housing 5) >> (linear expansion coefficient α B of fastening member 2), when temperature rises, the fastening member 2 is in the axial force biasing direction (pedestal 4 In the vertical direction), and the housing 5 also expands in the same direction. At this time, since the expansion amount in the axial force biasing direction of the fastening body 2 is smaller than the expansion amount in the same direction of the housing 5, the axial force temporarily increases.
しかし逆に温度が低下すると、筐体５は締結体２よりも大きく収縮し、締結体２の軸力が低下する。その結果、締結体２の軸力は緩み発生軸力Ｘよりも低い軸力になり、この場合において移動体通信用マーカー１が振動すると、締結体２は振動の影響を受けて緩み、移動体通信用マーカー１を安定的に固定することができない。 However, when the temperature decreases, the housing 5 contracts more than the fastening body 2 and the axial force of the fastening body 2 decreases. As a result, the axial force of the fastening body 2 becomes loose and becomes an axial force lower than the axial force X. In this case, when the mobile communication marker 1 vibrates, the fastening body 2 is loosened under the influence of vibration and the mobile body The communication marker 1 can not be fixed stably.
（４）本実施の形態による効果
以上のように本実施の形態によれば、締結体２を用いて、移動体通信用マーカー１を台座４に直接締結する。これにより締結体２による締結を補助するための金属材を移動体通信用マーカー１に設置する必要がなく、製造コストを抑制することができる。
(4) Effects of the Present Embodiment As described above, according to the present embodiment, the mobile communication marker 1 is directly fastened to the pedestal 4 using the fastening body 2. It is not necessary to install the metal material for assisting the fastening by the fastening body 2 in the marker 1 for mobile communication by this, and can suppress a manufacturing cost.
更に本実施の形態によれば、筐体５の線膨張係数αＲと、締結体２の線膨張係数αＢとを略同一にして移動体通信用マーカー１を作製するようにしたので、温度変動の影響を受けて締結体２の軸力が低下することを抑制することができる。 Furthermore, according to the present embodiment, since the linear expansion coefficient α R of the housing 5 and the linear expansion coefficient α B of the fastening body 2 are made substantially the same to produce the marker 1 for mobile communication, the temperature It can suppress that the axial force of the fastening body 2 falls under the influence of a fluctuation | variation.
よって締結してから長時間経過した後であっても、締結体２の軸力を保持して緩みを防止することができる。そして移動体通信用マーカー１を安定的に固定することができる。 Therefore, even after a long time has passed since fastening, the axial force of the fastening body 2 can be held to prevent loosening. Then, the mobile communication marker 1 can be stably fixed.
なお筐体５の素材としてＦＲＰを用いる場合、筐体５の成型時の樹脂の流れにより強化繊維方向が変わり、筐体５の線膨張係数αＲにばらつきが生じる。このばらつきを考慮して、筐体５の線膨張係数αＲと、締結体２の線膨張係数αＢとの比αＲ／αＢを０．８０＜αＲ／αＢ＜１．２０とすることが望ましい。 In the case of using the FRP as a material of the housing 5, by the flow of resin during molding of the housing 5 changes the reinforcing fiber direction, variations in the coefficient of linear expansion alpha R of the housing 5. The variation in consideration, and the linear expansion coefficient alpha R of the housing 5, the ratio α R / α B of the linear expansion coefficient alpha B of the fastening member 2 0.80 <α R / α B <1.20 and It is desirable to do.
（５）他の実施の形態
図７は、他の移動体通信用マーカー１Ａの断面構成を示す。具体的には図１のＡ−Ａ断面構成を示す。移動体通信用マーカー１Ａは、トレイ６を備えず、電子基板７を充填材８により固定している点で、図３の移動体通信用マーカー１と異なる。
(5) Another Embodiment FIG. 7 shows the cross-sectional configuration of another mobile communication marker 1A. Specifically, an AA cross-sectional configuration of FIG. 1 is shown. The mobile communication marker 1A is different from the mobile communication marker 1 of FIG. 3 in that the mobile communication marker 1A does not include the tray 6, and the electronic substrate 7 is fixed by the filler 8.
このように作製された移動体通信用マーカー１Ａにおいても、上記説明してきた移動体通信用マーカー１と同様の効果を得ることができる。すなわち製造コストを抑制し、長時間、締結体２の軸力を保持して緩みを防止することができる。 Also in the mobile communication marker 1A manufactured in this manner, the same effect as the mobile communication marker 1 described above can be obtained. That is, the manufacturing cost can be suppressed, and the axial force of the fastening body 2 can be held for a long time to prevent loosening.
図８〜図１０は、他の移動体通信用マーカー１Ａ、１Ｂ及び１Ｃの拡大断面構成を示す。また図１１は、他の締結方法により固定された移動体通信用マーカー１（１Ａ〜１Ｃ）の上面構成を示す。 8 to 10 show enlarged cross-sectional configurations of other mobile communication markers 1A, 1B and 1C. Moreover, FIG. 11 shows the upper surface structure of the marker 1 (1A-1C) for mobile communication fixed by the other fastening method.
図８に示す他の移動体通信用マーカー１Ａは、上記の通りトレイ６を備えず、電子基板７を充填材８により固定している点で、図３の移動体通信用マーカー１と異なる。符号１４は、筐体５の一端が他部材（ここでは締結体２）と接触する接触部分の接触面積を示す。また符号１５は、筐体５の他端が他部材（ここでは台座４）と接触する接触部分の接触面積を示す。これらの接触面積の合計の面積Ａ［ｍｍ２］の条件については後述する。 The other mobile communication marker 1A shown in FIG. 8 differs from the mobile communication marker 1 of FIG. 3 in that the electronic substrate 7 is fixed by the filler 8 without the tray 6 as described above. The code | symbol 14 shows the contact area of the contact part which one end of the housing | casing 5 contacts with other members (here the fastening body 2). Moreover, the code | symbol 15 shows the contact area of the contact part which the other end of the housing | casing 5 contacts with another member (here base 4). The conditions of the area A [mm 2 ] of the total of these contact areas will be described later.
また図９に示す他の移動体通信用マーカー１Ｂは、図８の移動体通信用マーカー１Ａの構成に加えて、筐体５と締結体２との間にスペーサー１２Ａを設置し、台座４には予めナット１３を設置し、筐体５と台座４又はナット１３との間にスペーサー１２Ｂを設置している点で、図３の移動体通信用マーカー１と異なる。 In addition to the configuration of the mobile communication marker 1A shown in FIG. 8, another mobile communication marker 1B shown in FIG. Is different from the mobile communication marker 1 of FIG. 3 in that the nut 13 is installed in advance and the spacer 12B is installed between the housing 5 and the base 4 or the nut 13.
このように作製された移動体通信用マーカー１Ａにおいても、上記説明してきた移動体通信用マーカー１と同様、製造コストを抑制し、長時間、締結体２の軸力を保持して緩みを防止することができる。 Also in the mobile communication marker 1A thus manufactured, as in the case of the mobile communication marker 1 described above, the manufacturing cost is suppressed, and the axial force of the fastening body 2 is held for a long time to prevent loosening. can do.
なお図９における符号１４は、筐体５の一端が他部材（ここではスペーサー１２Ａ）と接触する接触部分の接触面積を示す。また符号１５は、筐体５の他端が他部材（ここではスペーサー１２Ｂ）と接触する接触部分の接触面積を示す。これらの接触面積の合計の面積Ａ［ｍｍ２］の条件については後述する。 In addition, the code | symbol 14 in FIG. 9 shows the contact area of the contact part which one end of the housing | casing 5 contacts with another member (here spacer 12A). Moreover, the code | symbol 15 shows the contact area of the contact part which the other end of the housing | casing 5 contacts with another member (here spacer 12B). The conditions of the area A [mm 2 ] of the total of these contact areas will be described later.
また図１０に示す他の移動体通信用マーカー１Ｃは、図８の移動体通信用マーカー１Ａの構成に加えて、筐体５の強化繊維１６の配向方向を締結体２の軸方向と略同一となるように作製した点で、図３の移動体通信用マーカー１と異なる。強化繊維１６の配向方向を締結体２の軸方向と略同一とすることで、樹脂の応力緩和の影響を低減することができ、時間経過に伴い低下する軸力の量を最小限に維持することができる。なお符号１４及び１５は、図８で説明したものと同様の接触面積を示す。 In addition to the configuration of the mobile communication marker 1A shown in FIG. 8, another mobile communication marker 1C shown in FIG. 10 has substantially the same orientation direction of the reinforcing fiber 16 of the housing 5 as the axial direction of the fastening body 2. 3 differs from the marker 1 for mobile communication in FIG. By making the orientation direction of the reinforcing fiber 16 substantially the same as the axial direction of the fastening body 2, the influence of stress relaxation of the resin can be reduced, and the amount of axial force decreasing with the passage of time is kept to a minimum. be able to. Reference numerals 14 and 15 denote contact areas similar to those described with reference to FIG.
また図１１に示す他の締結方法は、４本の締結体２を用いて移動体通信用マーカー１（１Ａ〜１Ｃ）を締結している点で、図１の締結方法と異なる。このように２本に限らず複数の締結体２により移動体通信用マーカー１（１Ａ〜１Ｃ）を締結するようにしても、上記説明してきた移動体通信用マーカー１と同様の効果を得ることができる。すなわち製造コストを抑制し、長時間、締結体２の軸力を保持して緩みを防止することができる。 Another fastening method shown in FIG. 11 is different from the fastening method of FIG. 1 in that the mobile communication markers 1 (1A to 1C) are fastened using four fasteners 2. Even when the mobile communication markers 1 (1A to 1C) are fastened by two or more fastening bodies 2 as described above, the same effect as the mobile communication marker 1 described above can be obtained. Can. That is, the manufacturing cost can be suppressed, and the axial force of the fastening body 2 can be held for a long time to prevent loosening.
ここで、以降は接触面積Ａの条件について説明する。接触面積１４及び１５の合計面積をＡ［ｍｍ２］、移動体通信用マーカー１（１Ａ〜１Ｃ）の質量をｍ［ｋｇ］、移動体通信用マーカー１（１Ａ〜１Ｃ）が受ける最大加速度をａ［ｍ／ｓ２］、移動体通信用マーカー１（１Ａ〜１Ｃ）を固定するために用いる締結体２の本数をＮ［本］、筐体５の降伏応力又は０．２％耐力をσｙ［ＭＰａ］、軸力低下係数をＫとした場合、移動体通信用マーカー１（１Ａ〜１Ｃ）は、下記式１を満たすように構成される。 Here, the condition of the contact area A will be described hereinafter. The total area of contact areas 14 and 15 is A [mm 2 ], the mass of mobile communication marker 1 (1A to 1C) is m [kg], and the maximum acceleration received by mobile communication marker 1 (1A to 1C) is a [m / s 2 ], N [#] of the number of fasteners 2 used to fix the mobile communication marker 1 (1A to 1C), yield stress or 0.2% proof stress of the housing 5 σ Assuming that y [MPa] and the axial force reduction coefficient are K, the mobile communication marker 1 (1A to 1C) is configured to satisfy the following equation 1.
上記式１の作用について説明する。締結体２の軸力は、時間経過とともに低下するため、初期軸力をＦ１［Ｎ］、低下後の残存軸力をＦｎ［Ｎ］、軸力低下係数をＫとすると、残存軸力Ｆｎは、ＫＦ１で表すことができる。なお軸力低下係数Ｋは、例えば１年後には０．３６、３０年後には０．２３のような値をとる。 The operation of the above equation 1 will be described. Since the axial force of the fastening body 2 decreases with time, assuming that the initial axial force is F1 [N], the residual axial force after reduction is Fn [N], and the axial force reduction coefficient is K, the residual axial force Fn is , KF1 can be represented. The axial force reduction coefficient K takes, for example, a value of 0.36 after one year and 0.23 after 30 years.
一方で質量ｍの移動体通信用マーカー１（１Ａ〜１Ｃ）に最大加速度ａが負荷されたとき、１本の締結体２に掛かる力は、ｍａ／Ｎ［Ｎ］となる。この単位数当りの締結体２に掛かる力ｍａ／Ｎが締結体２の残存軸力ＫＦ１を上回ると、締結体２に緩みが生じることになる。よって一定期間経過後の締結体２に緩みが生じないようにするためには、ＫＦ１＞ｍａ／Ｎを満たす必要がある。 On the other hand, when the maximum acceleration a is loaded on the mobile communication markers 1 (1A to 1C) of mass m, the force applied to one fastening body 2 is ma / N [N]. When the force ma / N applied to the fastening body 2 per unit number exceeds the remaining axial force KF 1 of the fastening body 2, the fastening body 2 is loosened. Therefore, in order to prevent the fastening body 2 from loosening after a predetermined period of time, it is necessary to satisfy KF1> ma / N.
また初期軸力Ｆ１は、筐体５の強度よりも小さくなるように設定する必要がある。具体的には筐体５の降伏応力又は０．２％耐力をσｙ［ＭＰａ］、筐体５に対して接触する接触面積［Ａｍｍ２］としたとき、Ｆ１／Ａ＜σｙを満たすように設定する必要がある。以上の考察により、上記式１が得られる。 Further, the initial axial force F1 needs to be set to be smaller than the strength of the housing 5. Specifically, when it is assumed that the yield stress or 0.2% proof stress of the housing 5 is σ y [MPa] and the contact area [A mm 2 ] in contact with the housing 5, F1 / A <σ y is satisfied. Should be set to From the above consideration, the above equation 1 is obtained.
上記式１を満たすように構成された移動体通信用マーカー１（１Ａ〜１Ｃ）は、筐体５の損傷を防止し、かつ、長時間、締結体２の軸力を保持して緩みを防止することができる。よって移動体通信用マーカー１（１Ａ〜１Ｃ）を安定的に固定することができる。 The mobile communication marker 1 (1A to 1C) configured to satisfy the above equation 1 prevents damage to the housing 5 and holds the axial force of the fastening body 2 for a long time to prevent loosening. can do. Thus, the mobile communication marker 1 (1A to 1C) can be stably fixed.
１ 移動体通信用マーカー
２ 締結体
３ 路面
４ 台座
５ 筐体
６ トレイ
７ 電子基板
８ 充填材
９ 移動体
１０ アンテナ
１１ 無線通信
１２ スペーサー
１３ ナット
１４ 上面側接触面積
１５ 下面側接触面積
１６ 強化繊維
DESCRIPTION OF SYMBOLS 1 Mobile communication marker 2 Fastening body 3 Road surface 4 Pedestal 5 Case 6 Tray 7 Electronic board 8 Filler 9 Moving body 10 Antenna 11 Wireless communication 12 Spacer 13 Nut 14 Upper surface side contact area 15 Lower surface side contact area 16 Reinforcement fiber
Claims (9)
電子基板を内部に備える筐体と、
前記筐体を支持する台座と、
前記筐体と前記台座とを締結する締結体とを備え、
前記筐体は、温度変動に応じて膨張又は収縮する樹脂により成型され、
前記締結体は、前記筐体の線膨張係数と略同一の線膨張係数を有し、
前記締結体の本数をＮ［本］、前記筐体の降伏応力をσ ｙ ［ＭＰａ］、前記移動体通信用マーカーの質量をｍ［ｋｇ］、前記締結体の軸力低下係数をＫ、前記移動体通信用マーカーに掛かる加速度をａ［ｍ／ｓ ２ ］、前記筐体と前記締結体との接触面積及び前記筐体と前記台座との接触面積の合計の面積をＡ［ｍｍ ２ ］としたとき、前記合計の面積Ａは、Ａ＞（ｍａ）／ＮＫσ ｙ を満たしている
ことを特徴とする移動体通信用マーカー。 A marker for mobile communication,
A housing provided with electronic substrate therein,
A pedestal for supporting the housing;
And a fastening body for fastening the housing and the pedestal,
The housing is molded of a resin that expands or contracts in response to temperature fluctuations,
The fastening body has a linear expansion coefficient substantially the same as the linear expansion coefficient of the housing ,
The number of the fastening body is N [number], the yield stress of the casing is σ y [MPa], the mass of the mobile communication marker is m [kg], the axial force reduction coefficient of the fastening body is K, the above The acceleration applied to the mobile communication marker is a [m / s 2 ], and the total area of the contact area between the housing and the fastening body and the contact area between the housing and the pedestal is A [mm 2 ] When the total area A satisfies A> (ma) / NKσ y
Mobile communications for markers that characterized a call.
前記筐体の線膨張係数と、前記締結体の線膨張係数との比が予め定められた一定の範囲内となる線膨張係数を有する
ことを特徴とする請求項１に記載の移動体通信用マーカー。 The fastening body is
The mobile communication device according to claim 1, characterized in that it has a linear expansion coefficient such that the ratio of the linear expansion coefficient of the case and the linear expansion coefficient of the fastening body is within a predetermined fixed range. marker.
ボルトであり、頭部が前記筐体の一端を下方に押圧するように接触し、端部が前記台座に螺合して接触することにより、前記筐体と前記台座とを直接締結する
ことを特徴とする請求項１に記載の移動体通信用マーカー。 The fastening body is
It is a bolt, and the head is in contact so as to press one end of the casing downward, and the end is screwed into contact with the pedestal, thereby directly fastening the casing and the pedestal. The mobile communication marker according to claim 1, characterized in that:
地上、壁面又は天井に固定される
ことを特徴とする請求項１に記載の移動体通信用マーカー。 The pedestal is
The marker for mobile communication according to claim 1, which is fixed to the ground, a wall or a ceiling.
繊維強化プラスチックにより成型されて構成される
ことを特徴とする請求項１に記載の移動体通信用マーカー。 The housing is
The marker for mobile communication according to claim 1, characterized in that it is configured by being molded of fiber reinforced plastic.
ガラス繊維又は炭素繊維を含む複合材料である
ことを特徴とする請求項５に記載の移動体通信用マーカー。 The fiber reinforced plastic is
It is a composite material containing glass fiber or carbon fiber. The marker for mobile communication of Claim 5 characterized by the above-mentioned.
前記締結体近傍の繊維の配向が前記締結体の軸方向と略同一となるように成型される
ことを特徴とする請求項５に記載の移動体通信用マーカー。 The fiber reinforced plastic is
The marker for mobile communication according to claim 5, wherein the fibers in the vicinity of the fastening body are molded so that the orientation of fibers in the vicinity of the fastening body is substantially the same as the axial direction of the fastening body.
ことを特徴とする請求項１に記載の移動体通信用マーカー。 The mobile communication marker according to claim 1, wherein the fastening body is a stainless steel bolt.
ことを特徴とする請求項１に記載の移動体通信用マーカー。 The ratio (α R / α B ) of the linear expansion coefficient (α R ) of the housing to the linear expansion coefficient (α B ) of the fastening body is 0.80 <(α R / α B ) <1.20. The mobile communication marker according to claim 1, characterized in that:
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015123175A JP6537361B2 (en) | 2015-06-18 | 2015-06-18 | Mobile communication marker |
| CN201610411183.5A CN106257067B (en) | 2015-06-18 | 2016-06-13 | Mobile communication identifies |
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| JP2015123175A JP6537361B2 (en) | 2015-06-18 | 2015-06-18 | Mobile communication marker |
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| JP6537361B2 true JP6537361B2 (en) | 2019-07-03 |
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Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3809148A (en) * | 1972-11-30 | 1974-05-07 | Copper Range Co | Continuous casting die with compatible lining and jacket |
| JPS5689019U (en) * | 1979-12-12 | 1981-07-16 | ||
| JPS6011714A (en) * | 1983-07-01 | 1985-01-22 | Yanmar Diesel Engine Co Ltd | Connecting rod |
| JPS6049115A (en) * | 1983-08-26 | 1985-03-18 | Toyota Motor Corp | Connecting rod for internal-combustion engine made of light metal |
| JPH03288007A (en) * | 1990-04-02 | 1991-12-18 | Sony Corp | Thin plate tightening structure |
| CN2181590Y (en) * | 1992-05-21 | 1994-11-02 | 阜新电业局 | Theft-proof bolt fastening device |
| JP3235429B2 (en) * | 1995-09-29 | 2001-12-04 | 株式会社日立製作所 | Method of manufacturing rotating electric machine |
| JP2005009582A (en) * | 2003-06-19 | 2005-01-13 | Sumitomo Electric Ind Ltd | Fastening structure for use at low temperature |
| JP2009001434A (en) * | 2007-06-19 | 2009-01-08 | Olympus Corp | Apparatus for producing optical element |
| JP5035356B2 (en) * | 2010-01-26 | 2012-09-26 | 株式会社デンソー | Resin-sealed electronic device and method for manufacturing the same |
| IN2014DN08931A (en) * | 2012-04-26 | 2015-05-22 | Hitachi Ltd | |
| JP2014192529A (en) * | 2013-03-26 | 2014-10-06 | Hitachi Ltd | Mobile communication marker |
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| Publication number | Publication date |
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| JP2017009001A (en) | 2017-01-12 |
| CN106257067B (en) | 2018-05-11 |
| CN106257067A (en) | 2016-12-28 |
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