JPH07113573B2

JPH07113573B2 - Weight measuring device

Info

Publication number: JPH07113573B2
Application number: JP61262163A
Authority: JP
Inventors: 博福山; 泰雄鈴木
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 1986-11-04
Filing date: 1986-11-04
Publication date: 1995-12-06
Anticipated expiration: 2010-12-06
Also published as: JPS63117224A

Description

【発明の詳細な説明】〔産業上の利用分野〕この発明は、重量を測定するための重量測定装置に関
し、特に11tonダンプカー等の大型かつ重負荷で車輪の
軸数が３〜５軸の車輌の測定に用いて有用な重量測定装
置に関するものである。Description: TECHNICAL FIELD The present invention relates to a weight measuring device for measuring weight, and particularly to a large-sized and heavy-load vehicle such as an 11 ton dump truck having 3 to 5 axles. The present invention relates to a weight measuring device useful for measuring

[Conventional technology]

従来の重量測定装置は、第15図に示すように軸数を３軸
有する大型トラックを測定する場合、第16図および第17
図に示すように中央に軸重計100をセットし、その両側
に平台101,101を接続し、これら平台101,101に傾斜台10
2,102をそれぞれ接続したものが知られている。このよ
うな測定装置で第15図に示す大型トラックの積載物の重
量を測定する場合軸重計100に１軸,2軸,3軸と３回載せ
て測定し、その合計を指示計に表示して行っていた。第
16図及び第17図に示すものを２組用意し、左右のタイヤ
が軸重計100に載るようにする。軸重計100の構造は、第
18図および第19図に示すように下板103にロードセル104
を取付けロードセル104に上板105を取付けたものが一般
的である。上板105に重量がかかるとロードセル104が作
動し、ロードセル104の出力をロードセルアンプで増幅
して表示するようになっている。そして、軸重計100の
高さ（厚さ）Ａは100〜150mmあり、その大きさは第19図
に示すＢの長さが500mm程度、Ｃの長さが700mm程度であ
った。The conventional weight measuring device is shown in FIGS. 16 and 17 when measuring a large truck having three axes as shown in FIG.
As shown in the figure, set the axle load meter 100 in the center, connect the flat bases 101 and 101 to both sides, and attach the flat bases 10 to the flat bases 101 and 101.
It is known that 2,102 are respectively connected. When measuring the weight of the load of the heavy truck shown in Fig. 15 with such a measuring device, it is placed on the axle load scale 100 three times with 1 axis, 2 axes and 3 axes, and the total is displayed on the indicator. I was going. First
Prepare two sets shown in Fig. 16 and Fig. 17 so that the left and right tires can be placed on the axle load meter 100. The structure of the axle load scale 100 is
As shown in FIGS. 18 and 19, the load cell 104 is attached to the lower plate 103.
It is general that the upper plate 105 is attached to the load cell 104. When the upper plate 105 is heavy, the load cell 104 operates, and the output of the load cell 104 is amplified by the load cell amplifier and displayed. The height (thickness) A of the axle load scale 100 was 100 to 150 mm, and the size thereof was such that the length B shown in FIG. 19 was about 500 mm and the length C was about 700 mm.

[Problems to be solved]

従来のロードセル104を使用したものでは、重量が40〜5
0kgあり運搬に極めて不便であり、一人では到底作業が
できないものであった。また、４個のロードセル104に
負荷が均一にかかりにくく、偏荷重による測定誤差が大
きかった。さらに、ロードセル104自体が80〜100mmの高
さを有し、そのために装置全体の厚みが100〜150mmにも
なってしまい、車輌を載せるのが困難となり、そのため
に車輌を平衡にするために平台101や傾斜台102も厚くか
つ重くせざるをえなかった。さらにまた、ロードセル10
4を価格が高価なために装置全体としてのコストが高く
つくものであった。また、ロードセル104に取付けた上
板105がガタつくためにこわれやすいという欠点もあっ
た。With the conventional load cell 104, the weight is 40 to 5
Since it was 0 kg, it was extremely inconvenient to carry, and it was impossible for one person to do the work at all. Further, it was difficult to uniformly apply a load to the four load cells 104, and a measurement error due to an unbalanced load was large. Further, the load cell 104 itself has a height of 80 to 100 mm, which makes the entire device thickness 100 to 150 mm, which makes it difficult to mount the vehicle, and therefore, the flat base is used to balance the vehicle. The 101 and the ramp 102 also had to be thick and heavy. Furthermore, load cell 10
Since 4 is expensive, the cost of the entire device is high. Further, the upper plate 105 attached to the load cell 104 has a drawback that it is easily broken due to rattling.

そこで、この発明は、測定装置の軽量化を図り、一人で
も作業が可能であり、正確に測定できる重量測定装置を
提供することを目的とする。Therefore, an object of the present invention is to provide a weight measuring device which can reduce the weight of the measuring device, can be operated by one person, and can perform accurate measurement.

[Means for solving problems]

上述の目的を達成するため、この発明は、四角形中央部
分と同じく四角形周囲部分とを２重枠構造に形成し、前
記中央部分の対向する各辺と、それに対応する前記周囲
部分の各辺とを４ケ所の梁で連結した一体板上構造物の
中央部分を荷重がかかる荷重板に構成するとともに、各
梁の両側面に少なくとも４つの抵抗を備えた一対のひず
みゲージを接着し荷重板にかかる荷重を各梁の個所での
ひずみ量として検出するように構成した２つの第１及び
第２測定器を有し、第１及び第２測定器を測定対象であ
る車両の進行方向左右に分割し、それぞれの測定器の梁
は該車両進行方向で中央部分と周囲部分を連結する方向
にて配設し、第１及び第２測定器のひずみ量を合計する
ために両測定器をケーブルで着脱自在に接続し、このケ
ーブルを収めておくためのケーブル溝を両測定器に形成
し、一方の測定器に両方の測定器で計測されたひずみ量
を合計して表示する表示器へつながる接続線をつなぎ、
両測定器の外側面に設けられたケーブルと接続線をつな
ぐためのコネクターをまたぐように把手を取付けたもの
である。In order to achieve the above-mentioned object, the present invention forms a quadrangular central portion and a quadrangular peripheral portion into a double frame structure, and forms the opposing sides of the central portion and the corresponding sides of the peripheral portion. The central part of the structure on the integrated plate, which is connected by four beams, is configured as a load plate to which a load is applied, and a pair of strain gauges with at least four resistances are bonded to both sides of each beam to form a load plate. It has two first and second measuring devices configured to detect such a load as a strain amount at the location of each beam, and divides the first and second measuring devices into right and left in the traveling direction of the vehicle to be measured. However, the beams of each measuring device are arranged in a direction connecting the central part and the peripheral part in the vehicle traveling direction, and both measuring devices are connected by a cable in order to sum the strain amounts of the first and second measuring devices. Removably connect and store this cable The cable grooves formed on both instrument for, connecting a connection line connected to a display device for displaying the sum of the strain amount measured by both instruments in one instrument,
The handle is attached so as to straddle the connector for connecting the cable and the connection line provided on the outer surface of both measuring instruments.

[Action]

この発明では、左右いずれかのタイヤが載る個所が２つ
の第１及び第２測定器に分離されているために、１つの
測定器そのものは一人の作業員が扱える程度に軽くな
り、しかも第18図に示すＡの高さを極めて低くすること
ができるとともに、ロードセルを用いずにひずみゲージ
を使用したので、正確に重量を測定できる。According to the present invention, since one of the left and right tire mounting portions is separated into the two first and second measuring instruments, one measuring instrument itself is light enough to be handled by one worker, and the eighteenth measuring instrument is used. The height of A shown in the figure can be made extremely low, and since the strain gauge is used without using the load cell, the weight can be accurately measured.

また、荷重板を小型にでき、そのために各測定器の４個
所の梁に負荷が均一にかかり、偏荷重による測定誤差を
小さくすることができる。さらに、それぞれの測定器の
梁は該車両進行方向で中央部分と周囲部分を連結する方
向にて配置してあるので、車両を測定器に乗せる時に梁
の許容歪み量を越えた外力が加わり測定器が破壊する事
を防げる。Further, the load plate can be made small, and therefore, the load is uniformly applied to the four beams of each measuring device, and the measurement error due to the unbalanced load can be reduced. Further, since the beams of each measuring device are arranged in the direction connecting the central part and the peripheral part in the traveling direction of the vehicle, when the vehicle is placed on the measuring device, an external force exceeding the allowable strain amount of the beam is applied to measure. Prevents the vessel from being destroyed.

〔Example〕

以下にこの発明の好適な実施例を図面を参照しつつ説明
する。Preferred embodiments of the present invention will be described below with reference to the drawings.

第１図はこの装置の最小単位を示した平面略図であり、
第１測定器50と第２測定器60とを突き合わせて使用した
ものである。それぞれの測定器50又は60は、第２図に示
す如く構成してある。すなわち、一体板状構造物の四角
形中央部分と四角形周囲部分２とを４ケ所の梁３で連結
して中央部分を荷重がかかる荷重板１に構成してある。
４つの梁３を形成するには、横方向の溝30と縦方向の溝
31とを形成する。したがって、荷重板１は周囲部分２か
ら張り出した４つの梁３で空中に保持された格好とな
る。荷重板１に上方から荷重が作用すると梁３の個所に
は剪断ひずみが生ずる。この梁３に生ずる剪断ひずみを
利用してひずみゲージ４でひずみ量を電気的に増幅して
検出し重量を測定する。第２図に示す実施例において
は、荷重板１の側面が第４図に示すようにオーバーハン
グして側縁の周囲部分２をおおっている。ひずみゲージ
４は、４ケ所の梁３の梁側面に後述するように４つの抵
抗を備えた一対のものとして接着され、合計で８枚用い
られている。１つの梁３の両側面に接着されるひずみゲ
ージ４は、２つのひずみゲージ4,4を第６図に示すよう
に接続して一対のゲージ40を構成するようにしてある。
２個一対のひずみゲージ4,4にそれぞれR₁,R₂,R₃,R₄があ
り、これらの抵抗は荷重方向に対して45度傾斜した格好
になっている。一対のゲージ40は４個の梁３にそれぞれ
設けられて、第７図に示されるように結線されている。
一定の電圧（例えば3V）が各ゲージ40に印加されてい
て、荷重板１に荷重が作用すると４つのゲージ40から出
力される電圧の総和の平均値が増幅器で増幅されて出力
され、これを表示器でデジタル表示するようになってい
る。また荷重板１の端部より梁３の中心までの距離Ｔ
は、L₁分の４（4/L₁）と等しいか、それ以下に設計して
ある。溝31の幅D₂は溝30の幅D₁よりも大きく形成してあ
る（D₁≦D₂）。さらに、第５図に示すように、荷重板１
の底部の隙間ｄは２分のｈ（h/2）に等しいか、それ以
下に設計してある。FIG. 1 is a schematic plan view showing the minimum unit of this device,
The first measuring device 50 and the second measuring device 60 are used in abutment with each other. Each measuring device 50 or 60 is constructed as shown in FIG. That is, the quadrangular central portion of the integrated plate-shaped structure and the quadrangular peripheral portion 2 are connected by the beams 3 at four places, and the central portion is configured as a load plate 1 to which a load is applied.
To form the four beams 3, a horizontal groove 30 and a vertical groove
31 and 31 are formed. Therefore, the load plate 1 is in the form of being held in the air by the four beams 3 protruding from the peripheral portion 2. When a load is applied to the load plate 1 from above, shear strain is generated at the portion of the beam 3. Utilizing the shear strain generated in the beam 3, the strain gauge 4 electrically amplifies and detects the amount of strain to measure the weight. In the embodiment shown in FIG. 2, the side surface of the load plate 1 overhangs as shown in FIG. 4 and covers the peripheral portion 2 of the side edge. The strain gauges 4 are bonded to the beam side surfaces of the beams 3 at four locations as a pair having four resistors as described later, and a total of eight strain gauges are used. The strain gauges 4 bonded to both side surfaces of one beam 3 are configured so that two strain gauges 4, 4 are connected as shown in FIG. 6 to form a pair of gauges 40.
Two pairs of strain gauges 4, 4 have R ₁ , R ₂ , R ₃ , R ₄ respectively, and these resistances are inclined by 45 degrees with respect to the load direction. A pair of gauges 40 are provided on each of the four beams 3 and are connected as shown in FIG.
A constant voltage (3V, for example) is applied to each gauge 40, and when a load acts on the load plate 1, the average value of the sum of the voltages output from the four gauges 40 is amplified and output by an amplifier. It is designed to display digitally on the display. Also, the distance T from the end of the load plate 1 to the center of the beam 3
Is, L ₁ minute 4 (4 / L ₁₎ and equal, are designed less. The width D _{2 of the} groove 31 is formed larger than the width D _{1 of the} groove 30 (D ₁ ≦ D ₂ ). Furthermore, as shown in FIG.
The bottom clearance d is designed to be less than or equal to h / 2 (h / 2).

第２図乃至第７図に示すものは、いずれか一方の測定器
50又は60の構造を示すものであり、２つの第１及び第２
の測定器50,60のひずみゲージ４の結線は第８図に示す
とおりである。What is shown in FIGS. 2 to 7 is one of the measuring instruments.
Shows 50 or 60 structures, two first and second
The connection of the strain gauges 4 of the measuring instruments 50 and 60 of No. 1 is as shown in FIG.

両測定器50,60には第１図及び第９図に示すようにケー
ブル５を収めておくためのケーブル溝６がそれぞれ形成
してある。ケーブル５は第１測定器50と第２測定器60の
ひずみ量を合計するために両測定器50,60をつなぐもの
であり、このケーブル５の両端はコネクター7,8に着脱
自在になっている。第２測定器60には両方の測定器50,6
0で計測されたひずみ量を合計して表示する表示器へつ
ながる接続線９をつないであり、この接続線９もコネク
ター10に着脱自在になっている。両測定器50,60が突き
合わされる個所には、プラスチック、ゴム等により間座
11,12を設けてある。間座11は第１測定器50の側面に取
付けてあり、間座12は第２測定器60の側面に取付けてあ
る。また、第１測定器50のコネクター７を跨ぐように把
手13を第１測定器50の側面に取付けてあり、同様に第２
測定器60の側面にも把手14をコネクター8,14を跨ぐよう
に取付けてある。この把手13,14が取付けられた側の側
面の両端には突起15がそれぞれ取付けてある。As shown in FIGS. 1 and 9, both measuring devices 50 and 60 are provided with a cable groove 6 for accommodating the cable 5. The cable 5 connects the two measuring devices 50 and 60 in order to sum the strain amounts of the first measuring device 50 and the second measuring device 60, and both ends of this cable 5 are detachable to the connectors 7 and 8. There is. The second measuring device 60 has both measuring devices 50, 6
A connecting line 9 connected to an indicator for displaying the total strain amount measured at 0 is connected, and the connecting line 9 is also attachable / detachable to / from the connector 10. At the place where both measuring devices 50 and 60 are butted, a spacer is made of plastic, rubber, etc.
11 and 12 are provided. The spacer 11 is attached to the side surface of the first measuring device 50, and the spacer 12 is attached to the side surface of the second measuring device 60. In addition, the handle 13 is attached to the side surface of the first measuring device 50 so as to straddle the connector 7 of the first measuring device 50, and the second
A handle 14 is also attached to the side surface of the measuring device 60 so as to straddle the connectors 8 and 14. Protrusions 15 are attached to both ends of the side surface on the side where the handles 13 and 14 are attached.

第10図に示す実施例は、第15図に示す如き大型トラック
の各軸を計測するための装置全体を示すものであり、第
１図に示す装置を左右に一つづつ設けたものである。The embodiment shown in FIG. 10 shows the whole apparatus for measuring each axis of a large truck as shown in FIG. 15, and one apparatus shown in FIG. 1 is provided on the left and right sides. .

トラックは図面上は上方又は下方から走行してきて装置
上に載る。したがって、トラックのタイヤは梁３の長手
方向に沿って走行し、梁３に直交する方向ではない。す
なわち、梁３はトラック進行方向で中央部分と周囲部分
２とを連結する方向に配置される。The truck travels from above or below in the drawing and is placed on the device. Therefore, the tire of the truck runs along the longitudinal direction of the beam 3 and not in the direction orthogonal to the beam 3. That is, the beam 3 is arranged in a direction connecting the central portion and the peripheral portion 2 in the track traveling direction.

第11図はこの発明の測定装置と組合せて用いられる平台
16を示し、一端側の両側に突起15が嵌まり込むための溝
17が形成してあり、他端側の両側には後述する傾斜台20
と連結するための連結ピン18を形成してある。傾斜台20
にも平台16の溝17と同様の溝（図示せず）が形成してあ
り、この溝が連結ピン18に連結する。全体を構成したも
のを第13図及び第14図に示す。なお、平台16や傾斜台20
を使用せずに、荷重板１をオーバハングさせるとともに
周囲部分２にテーパを形成しておくことにより、車両を
直接この装置へ載せることもできる。FIG. 11 shows a flat base used in combination with the measuring device of the present invention.
16 is a groove for fitting the protrusions 15 on both sides on one end side.
17 is formed on both sides of the other end of the tilt table 20 to be described later.
A connecting pin 18 for connecting with is formed. Ramp 20
Also, a groove (not shown) similar to the groove 17 of the flat base 16 is formed, and this groove is connected to the connecting pin 18. The whole structure is shown in FIGS. 13 and 14. In addition, flat stand 16 and tilt stand 20
The vehicle can also be mounted directly on this device by overhanging the load plate 1 and forming a taper on the peripheral portion 2 without using.

両測定器50,60をそれぞれ構成する板状構造物の材料と
しては鉄板、アルミニウム、ジュラルミン、セラミッ
ク、プラスチック等の材料が使用可能である。また、ロ
ードセルを使用せずしかも二つの測定器50,60を一組と
して用いるためにそれぞれの測定器50,60の最大高さは4
5mm程度で良く、平台16や傾斜第20の厚みも同様に低く
することが可能である。なお、図示する実施例では各測
定器50,60にそれぞれ４つの梁３を設けたが、それぞれ
４つ以上の梁３を設けても良く、更には各梁３の両側面
に取付ける４つの抵抗を備えた一対のゲージ40は２対以
上であっても良い。As a material of the plate-shaped structure that constitutes each of the measuring devices 50 and 60, a material such as an iron plate, aluminum, duralumin, ceramic, or plastic can be used. Further, since the load cell is not used and the two measuring devices 50 and 60 are used as one set, the maximum height of each measuring device 50 and 60 is 4
The thickness may be about 5 mm, and the thicknesses of the flat base 16 and the inclined twentieth 20 can be similarly reduced. In the illustrated embodiment, each of the measuring instruments 50 and 60 is provided with four beams 3, but four or more beams 3 may be provided, and further, four resistors attached to both side surfaces of each beam 3 may be provided. The pair of gauges 40 provided with may be two or more pairs.

〔effect〕

以上説明したように、この発明によれば、２つの測定器
を合わせて使用するために全体の大きさは従来と同じ
（700mm×500mm）であっても、厚さは45mm程度に押さえ
ることができ、それぞれの測定器の重量も極めて軽くな
り、一人の作業員で作業が可能となる。また、２つの測
定器に分けてこれらのひずみ量を合計するために両測定
器をケーブルでつないでも、このケーブルはケーブル溝
に収まり、車両が載置させられるときにケーブルの破損
が生ずる虞れもない。また、把手はコネクターを跨ぐよ
うに設けてあるためにコネクターが把手で保護される。
また、この発明はロードセルを用いずにひずみゲージを
用いているために、コストが格段に安くなりしかも測定
精度が高く、さらには全体が一体に形成されているの
で、こわれにくく耐久性が向上した。As described above, according to the present invention, since the two measuring instruments are used together, the total size is the same as the conventional one (700 mm × 500 mm), but the thickness can be suppressed to about 45 mm. It is possible, and the weight of each measuring device is extremely light, and one worker can work. Further, even if the two measuring devices are divided into two measuring devices and the measuring devices are connected by a cable in order to sum these strain amounts, the cable will fit in the cable groove and the cable may be damaged when the vehicle is mounted. Nor. Further, since the handle is provided so as to straddle the connector, the connector is protected by the handle.
Further, since the present invention uses a strain gauge without using a load cell, the cost is remarkably low, the measurement accuracy is high, and the entire body is integrally formed, so that the durability is improved and the durability is improved. .

さらに、それぞれの測定器の梁は該車両進行方向で中央
部分と周囲部分を連結する方向にて配置してあるので、
車両を測定器に載せる時に梁の許容歪み量を越えた外力
が加わり測定器が破壊することを防げる。Further, since the beams of each measuring device are arranged in the direction connecting the central portion and the peripheral portion in the vehicle traveling direction,
When the vehicle is placed on the measuring instrument, it is possible to prevent the measuring instrument from being damaged by an external force exceeding the allowable strain amount of the beam.

[Brief description of drawings]

第１図はこの発明の好適な実施例を示す平面略図、第２
図はいずれか一方の測定器の詳細平面図、第３図は第２
図III−III線断面図、第４図は第２図IV−IV線断面図、
第４図は第２図IV−IV線断面図、第５図は全体の断面
図、第６図は一つの梁に接着される二個一対のひずみゲ
ージを示す図、第７図はひずみゲージの結線図、第８図
は２つの測定器におけるひずみゲージの結線図、第９図
は測定器の正面から見た一部拡大図、第10図は大型トラ
ックを測定するために第１図に示す装置を２組セットし
た状態を示す簡略平面図、第11図は平台を示す平面図、
第12図は平台の側面図、第13図は測定器に平台及び傾斜
台を取付けた状態を示す正面図、第14図は第13図の平面
図、第15図は計測すべき対象の一実施例を示す側面図、
第16図は従来装置を示す平面図、第17図は第16図の正面
図、第18図は軸重計の側面図、第19図は軸重計の平面図
である。１……荷重板、２……周囲部分、３……梁、４……ひずみゲージ、 40……一対のゲージ、５……ケーブル、６……ケーブル溝、 7,8,10……コネクター、９……接続線、 13,14……把手、 50……第１測定器、 60……第２測定器。FIG. 1 is a schematic plan view showing a preferred embodiment of the present invention, and FIG.
The figure is a detailed plan view of one of the measuring instruments, and Fig. 3 is the second.
Figure III-III line sectional view, Figure 4 is Figure 2 IV-IV line sectional view,
Fig. 4 is a sectional view taken along line IV-IV in Fig. 2, Fig. 5 is an overall sectional view, Fig. 6 is a diagram showing a pair of two strain gauges bonded to one beam, and Fig. 7 is a strain gauge. Fig. 8 is a connection diagram of strain gauges in two measuring instruments, Fig. 9 is a partially enlarged view from the front of the measuring instrument, and Fig. 10 is shown in Fig. 1 for measuring large trucks. A simplified plan view showing a state in which two sets of the devices shown are set, FIG. 11 is a plan view showing a flat base,
FIG. 12 is a side view of the flat stand, FIG. 13 is a front view showing a state in which the flat stand and the tilt stand are attached to the measuring instrument, FIG. 14 is a plan view of FIG. 13, and FIG. 15 is an object to be measured. A side view showing an embodiment,
FIG. 16 is a plan view showing a conventional device, FIG. 17 is a front view of FIG. 16, FIG. 18 is a side view of a shaft weigher, and FIG. 19 is a plan view of a shaft weigher. 1 ... Load plate, 2 ... surrounding part, 3 ... beam, 4 ... strain gauge, 40 ... pair of gauges, 5 ... cable, 6 ... cable groove, 7,8,10 ... connector, 9 ... Connection line, 13, 14 ... Handle, 50 ... 1st measuring device, 60 ... 2nd measuring device.

Claims

[Claims]

1. A quadrangular central portion and a quadrangular peripheral portion are formed in a double frame structure, and the opposing sides of the central portion and the corresponding peripheral portions of the peripheral portion are connected by four beams. The central portion of the integrated plate-shaped structure is configured as a load plate to which a load is applied, and at least 4 sides are provided on both sides of each beam.
Having a pair of strain gauges each having one resistance, and having two first and second measuring devices configured to detect the load applied to the load plate as the amount of strain at each beam position; The two measuring devices are divided into the right and left in the traveling direction of the vehicle to be measured, and the beams of the respective measuring devices are arranged in the direction connecting the central portion and the peripheral portion in the traveling direction of the vehicle. In order to total the strain amount of the measuring instrument, both measuring instruments are detachably connected with a cable, a cable groove for storing this cable is formed in both measuring instruments, and one measuring instrument measures with both measuring instruments. The feature is that a handle is attached so as to connect the connection line to the display unit that displays the total strain amount displayed, and to straddle the cable provided on the outer peripheral surface of both measuring instruments and the connector for connecting the connection line. Weighing machine.