JPH0599733A - Weighing instrument with shock absorber - Google Patents

Weighing instrument with shock absorber

Info

Publication number
JPH0599733A
JPH0599733A JP25821791A JP25821791A JPH0599733A JP H0599733 A JPH0599733 A JP H0599733A JP 25821791 A JP25821791 A JP 25821791A JP 25821791 A JP25821791 A JP 25821791A JP H0599733 A JPH0599733 A JP H0599733A
Authority
JP
Japan
Prior art keywords
cylinder
cylinder chamber
working fluid
stage
load
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP25821791A
Other languages
Japanese (ja)
Other versions
JP2607781B2 (en
Inventor
Masahiro Yano
昌宏 矢野
Original Assignee
Kubota Corp
株式会社クボタ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kubota Corp, 株式会社クボタ filed Critical Kubota Corp
Priority to JP25821791A priority Critical patent/JP2607781B2/en
Publication of JPH0599733A publication Critical patent/JPH0599733A/en
Application granted granted Critical
Publication of JP2607781B2 publication Critical patent/JP2607781B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a weighing instrument with shock absorber which can exert a large shock absorbing ability without deteriorating its measurement accuracy. CONSTITUTION:Until a control section 22 detects an in-measurement state, a supporting table 10 is pushed up by means of a compression spring 11 and a stage 1 is separated from a load detecting device 7. When an object to be measured is placed on the stage 1, a compressive force is applied to the first cylinder chamber (a) of a cylinder device 12 through the table 10 and the working fluid in the chamber (a) is pushed out by a flow rate decided by means of a flow metering valve 15. As a result, the table 10 slowly descends toward the device 7 and the stage 1 is loaded onto the device 7. When the stage 1 is loaded onto the device 7 and the section 22 detects the in-measurement state, a change-over valve 18 is switched and a working fluid 23 is forcibly supplied to a second cylinder chamber (b) from a pump 19 and, as a result, the stem 21 of the device 12 is further pulled in and the spring 11 is further compressed. In such a state, the table 10 is lowered to a position where the table 10 does not come into contact with the stage 1 and a weighing value is read.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【産業上の利用分野】本発明は載台に衝撃が加わった場
合に荷重検出装置を保護する衝撃緩衝機能の付いた計重
装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weighing device having a shock absorbing function for protecting a load detecting device when a shock is applied to a mounting table.
【0002】[0002]
【従来の技術】載台に被測定物を載せる際に、被測定物
を放り投げたりするとその衝撃力が荷重検出装置に直接
に作用して、荷重検出装置が破損する。
2. Description of the Related Art When an object to be measured is placed on a mounting table, if the object to be measured is thrown or thrown, the impact force directly acts on the load detecting device and the load detecting device is damaged.
【0003】そのため図4に示すように、載台1と固定
台2の間にダンパー3を介装して荷重検出装置であるロ
ードセル4を衝撃力から保護することができる。また、
このようなダンパー3を使用せずに図4に仮想線でしめ
すように、載台1の上にクッション材5を介して補助載
台6を設けて、補助載台6に被測定物を載置してロード
セル4を衝撃力から保護することができる。
Therefore, as shown in FIG. 4, a damper 3 is provided between the mounting table 1 and the fixed table 2 to protect the load cell 4, which is a load detecting device, from an impact force. Also,
As shown by the phantom lines in FIG. 4 without using such a damper 3, an auxiliary mount 6 is provided on the mount 1 via a cushion material 5, and an object to be measured is mounted on the auxiliary mount 6. The load cell 4 can be placed to protect it from impact.
【0004】[0004]
【発明が解決しようとする課題】ダンパー3を使用した
ものではクッション材5を使用したものに比べて、大き
な緩衝能力を期待できるが、荷重の一部がダンパー3に
よって常に支持された状態になっているので、測定精度
の低下を伴う問題がある。
Although the one using the damper 3 can be expected to have a greater cushioning capacity than the one using the cushion material 5, a part of the load is always supported by the damper 3. Therefore, there is a problem that the measurement accuracy is lowered.
【0005】本発明は大きな緩衝能力を期待でき、しか
も測定精度の低下を伴わない衝撃緩衝装置付き計重装置
を提供することを目的とする。
An object of the present invention is to provide a weighing device with a shock absorbing device, which is expected to have a large shock absorbing capacity and which is not accompanied by a decrease in measurement accuracy.
【0006】[0006]
【課題を解決するための手段】本発明の衝撃緩衝装置付
き計重装置は、載台が載置される支持台と固定側の間に
圧縮ばねを介装して前記載台を荷重検出装置の着力部か
ら持ち上げるとともに、前記支持台と固定側の間に前記
圧縮ばねと並列にシリンダ装置を介装し、前記シリンダ
装置の両シリンダ室のうちの載台からの荷重によって圧
縮される第1のシリンダ室への作動流体路に絞り弁を介
装し、荷重検出装置の検出荷重が規定重量を越えた測定
中状態を検出する制御部を設け、作動流体を送り出すポ
ンプとシリンダ装置の前記第1のシリンダ室とは反対側
の第2のシリンダ室との間に介装されて、前記制御部が
測定中状態を検出したときにポンプから第2のシリンダ
室に作動流体を供給する切換弁を設けたことを特徴とす
る。
According to another aspect of the present invention, there is provided a load detecting device for a load measuring apparatus having a shock absorbing device, wherein a compression spring is provided between a supporting base on which a mounting base is mounted and a fixed side. A cylinder device is installed between the support base and the fixed side in parallel with the compression spring, and is compressed by a load from a mounting base of both cylinder chambers of the cylinder device. A throttle valve is installed in the working fluid path to the cylinder chamber, and a control unit is provided to detect a measuring state in which the load detected by the load detection device exceeds the specified weight. A switching valve that is interposed between the first cylinder chamber and a second cylinder chamber on the opposite side, and supplies a working fluid from the pump to the second cylinder chamber when the control section detects the measuring state. Is provided.
【0007】[0007]
【作用】この構成によると、制御部が測定中状態を検出
するまでの状態では、支持台が圧縮ばねによって押し上
げられ、載台が荷重検出装置から分離している。
According to this structure, the support base is pushed up by the compression spring and the mounting base is separated from the load detecting device until the control section detects the measuring state.
【0008】載台に被測定物が載置されると、支持台を
介してシリンダ装置の第1のシリンダ室に圧縮力が作用
し、絞り弁で決まる単位時間の流量で第1のシリンダ室
の作動流体が押し出され、支持台が緩やかに荷重検出装
置に向かって降下して荷重検出装置に載台が負荷され
る。
When the object to be measured is placed on the table, a compressive force acts on the first cylinder chamber of the cylinder device via the support table, and the first cylinder chamber is flowed at a unit time determined by the throttle valve. Of the working fluid is pushed out, the support base is gently lowered toward the load detection device, and the mounting base is loaded on the load detection device.
【0009】荷重検出装置に載台が負荷されて制御部が
測定中状態を検出すると、切換弁が切り換えられてポン
プから第2のシリンダ室に作動流体が押し込まれ、シリ
ンダ装置のステムが引き込まれて圧縮ばねをさらに圧縮
して、支持台を載台に接触しない位置に降下させる。計
重値の読み取りは、この状態で実施する。
When the platform is loaded on the load detecting device and the control section detects the measuring state, the switching valve is switched, the working fluid is pushed from the pump into the second cylinder chamber, and the stem of the cylinder device is pulled in. Then, the compression spring is further compressed to lower the support base to a position where it does not contact the mounting base. Read the weight value in this state.
【0010】[0010]
【実施例】以下、本発明の実施例を図1〜図3に基づい
て説明する。本発明の衝撃緩衝装置付き計重装置は、図
1に示すように構成されている。荷重検出装置としての
台秤7は固定側8に載置されており、被測定物9が載置
される載台1は、待機状態では図1に示すように支持台
10によって台秤7から持ち上げられている。
Embodiments of the present invention will be described below with reference to FIGS. The weighing device with a shock absorbing device of the present invention is configured as shown in FIG. A platform scale 7 as a load detection device is mounted on a fixed side 8, and a platform 1 on which an object to be measured 9 is mounted is a support platform as shown in FIG. 1 in a standby state.
It is lifted from the platform scale 7 by 10.
【0011】支持台10は圧縮ばね11によって押し上げら
れているとともに、シリンダ装置12が圧縮ばね11と並列
に介装されている。シリンダ装置12の両シリンダ室のう
ちで載台1からの荷重によって圧縮されるシリンダ室を
第1のシリンダ室a,第1のシリンダ室aの反対側のシ
リンダ室を第2のシリンダ室bとすると、複数のシリン
ダ装置12の第1のシリンダ室aの相互が第1の配管13で
接続され、第2のシリンダ室bの相互が第2の配管14で
接続されている。第1の配管13は絞り弁15を介してタン
ク16に連通されている。絞り弁15には、第1の配管13か
らタンク16に向かっての作動流体の流れを禁止する方向
に逆止弁17が並列接続されている。第2の配管14は切換
弁としての電磁弁18を介してポンプ19に接続されてお
り、この電磁弁18は、台秤7の計重信号Sに基づいて切
り換えが実施されている。
The support base 10 is pushed up by a compression spring 11, and a cylinder device 12 is interposed in parallel with the compression spring 11. Of the two cylinder chambers of the cylinder device 12, the cylinder chamber compressed by the load from the mounting table 1 is referred to as a first cylinder chamber a, and the cylinder chamber opposite to the first cylinder chamber a is referred to as a second cylinder chamber b. Then, the first cylinder chambers a of the plurality of cylinder devices 12 are connected to each other by the first pipe 13, and the second cylinder chambers b are connected to each other by the second pipe 14. The first pipe 13 is connected to the tank 16 via a throttle valve 15. A check valve 17 is connected in parallel to the throttle valve 15 in a direction in which the flow of the working fluid from the first pipe 13 toward the tank 16 is prohibited. The second pipe 14 is connected to a pump 19 via a solenoid valve 18 as a switching valve, and the solenoid valve 18 is switched based on the weighing signal S of the platform scale 7.
【0012】なお、圧縮ばね11によって発生する上向き
の力の合計を“ F ”、載台1のむだ目重量を“ W
0 ”とすると、“ F >W0 ”に設定されてお
り、被測定物が載台1に負荷される前の待機状態では、
図1に示すように圧縮ばね11によって支持台10が台秤7
から持ち上げられて分離されている。ここでは支持台10
の重量は“ W0 ”に含まれている。
The total of the upward force generated by the compression spring 11 is "F", and the dead weight of the platform 1 is "W".
If " 0 " is set, "F>W0" is set, and in the standby state before the object to be measured is loaded on the platform 1,
As shown in FIG.
Have been lifted from and separated. Here the support base 10
Is included in "W 0 ".
【0013】さらに、この待機状態では電磁弁18は第1
ポジションP1に切り換わっていて、第2の配管14は配
管20を介してタンク16に連通し、ポンプ19による作動流
体の供給は止められている。
Further, in this standby state, the solenoid valve 18 is set to the first
It is switched to the position P1, the second pipe 14 communicates with the tank 16 via the pipe 20, and the supply of the working fluid by the pump 19 is stopped.
【0014】この待機状態で被測定物9が載台1に負荷
されると、圧縮ばね11の付勢に抗して支持台10が押し下
げられ、シリンダ装置12のステム21が第1のシリンダ室
aに押し込まれ、第1のシリンダ室aの作動流体は絞り
弁15によって規定された流量づつタンク16へ緩やかに戻
されて、第2のシリンダ室bには配管20と電磁弁18を介
してタンク16から作動流体が吸い上げられて、載台1が
緩やかに台秤7の上に降下して、図2に示すように載台
1が台秤7に負荷される。
When the object to be measured 9 is loaded on the mounting table 1 in this standby state, the support table 10 is pushed down against the bias of the compression spring 11, and the stem 21 of the cylinder device 12 is moved to the first cylinder chamber. Then, the working fluid in the first cylinder chamber a is gently returned to the tank 16 by the flow rate defined by the throttle valve 15 into the second cylinder chamber b via the pipe 20 and the solenoid valve 18. The working fluid is sucked up from the tank 16, the platform 1 is gently lowered onto the platform scale 7, and the platform 1 is loaded on the platform 7 as shown in FIG.
【0015】載台1が台秤7に負荷されて台秤の計重値
が荷重“ 零 ”から次第に増加し、零点付近の規定重
量になった測定中状態を制御部22が検出すると、電磁弁
18が切り換えられる。
When the platform 1 is loaded on the platform scale 7 and the weight value of the platform scale gradually increases from the load "zero", and the control section 22 detects the measuring state in which the specified weight near the zero point is reached, the solenoid valve is activated.
18 can be switched.
【0016】図3に示すように電磁弁18が第2ポジショ
ンP2に切り換えられると、ポンプ19から第2の配管14
を介して第2のシリンダ室bに作動流体が押し込まれ
て、圧縮ばね11の付勢に抗して支持台10が緩やかにさら
に降下し、支持台10が載台1から離反して被測定物9の
全荷重が台秤7に作用する。
As shown in FIG. 3, when the solenoid valve 18 is switched to the second position P2, the pump 19 to the second pipe 14
The working fluid is pushed into the second cylinder chamber b via the support cylinder 10 and further lowers gently against the urging force of the compression spring 11. The support base 10 is separated from the mount table 1 to be measured. The total load of the object 9 acts on the platform scale 7.
【0017】この状態で台秤7のバランスした計重値が
測定値とされる。このように絞り弁15で規定されている
速度でしか作動流体23がタンク16に吐き出されないた
め、被測定物9を載台1に乱暴に載せた場合であっても
台秤7の着力部に衝撃力が作用することがなく、台秤7
を保護することができる。また、図3に示したように、
計重値の読み取りの際には支持台10は載台1とは完全に
分離されて接触していないため、上記のように緩衝機能
を得られるにもかかわらず高精度の測定を期待できる。
In this state, the balanced weight value of the platform scale 7 is taken as the measured value. Since the working fluid 23 is discharged to the tank 16 only at the speed regulated by the throttle valve 15 in this way, even when the DUT 9 is roughly placed on the platform 1, the working fluid 23 is applied to the force applying section of the platform scale 7. No impact force is applied, and the platform scale 7
Can be protected. Also, as shown in FIG.
Since the support base 10 is completely separated from the mounting base 1 and is not in contact when reading the weight value, high-precision measurement can be expected even though the buffer function is obtained as described above.
【0018】図3に示す状態で測定が完了して載台1か
ら被測定物9が取り除かれると、計重信号Sが規定重量
を下回る状態になり、この状態を制御部22が検出して電
磁弁18を第1ポジションP1に切り換える。
When the measurement is completed in the state shown in FIG. 3 and the object to be measured 9 is removed from the mounting table 1, the weighing signal S falls below the specified weight, and the control section 22 detects this state. The solenoid valve 18 is switched to the first position P1.
【0019】電磁弁18が第1ポジションP1に切り換え
られると、支持台10が圧縮ばね11の付勢力で上方に押し
上げられて、第1のシリンダ室aには逆止弁17を介して
タンク16から作動流体が絞り弁15による流量制限を受け
ることなく吸い上げられ、第2のシリンダ室bの作動流
体は電磁弁18と配管20を介してタンク16に吐き出され
る。したがって、支持台10は降下の際よりも速くに上昇
して、載台1を台秤7から持ち上げて図1に示す待機状
態に復帰し、早期に次回の測定を実施できる。
When the solenoid valve 18 is switched to the first position P1, the support base 10 is pushed upward by the urging force of the compression spring 11, and the tank 16 is inserted into the first cylinder chamber a via the check valve 17. The working fluid is sucked up from the throttle valve 15 without being restricted in flow rate, and the working fluid in the second cylinder chamber b is discharged to the tank 16 via the solenoid valve 18 and the pipe 20. Therefore, the support base 10 rises faster than when it descends, the platform 1 is lifted from the platform scale 7 to return to the standby state shown in FIG. 1, and the next measurement can be performed early.
【0020】前記の作動流体23としては適当な粘性の液
体を使用することが好ましい。
As the working fluid 23, it is preferable to use a liquid having an appropriate viscosity.
【0021】[0021]
【発明の効果】以上のように本発明によれば、載台が載
置される支持台と固定側の間に圧縮ばねを介装して前記
載台を荷重検出装置の着力部から持ち上げるとともに、
前記支持台と固定側の間に前記圧縮ばねと並列にシリン
ダ装置を介装し、前記シリンダ装置の両シリンダ室のう
ちの載台からの荷重によって圧縮される第1のシリンダ
室への作動流体路に絞り弁を介装し、荷重検出装置の検
出荷重が規定重量を越えた測定中状態を検出する制御部
を設け、作動流体を送り出すポンプとシリンダ装置の前
記第1のシリンダ室とは反対側の第2のシリンダ室との
間に介装されて、前記制御部が測定中状態を検出したと
きにポンプから第2のシリンダ室に作動流体を供給する
切換弁を設けたため、載台に被測定物が載置されると、
支持台は絞り弁で決まる単位時間の流量で緩やかに荷重
検出装置に向かって降下して荷重検出装置に載台が負荷
され、載台に作用した衝撃力が荷重検出装置に作用する
ような事態を回避できる。
As described above, according to the present invention, the compression spring is interposed between the support base on which the mounting base is mounted and the fixed side to lift the mounting base from the force applying portion of the load detecting device. ,
A cylinder device is interposed in parallel with the compression spring between the support base and the fixed side, and the working fluid to the first cylinder chamber is compressed by a load from a mounting base of both cylinder chambers of the cylinder device. A throttle valve is installed in the passage, a control unit is provided for detecting the measuring state in which the load detected by the load detection device exceeds the specified weight, and the pump for sending the working fluid and the first cylinder chamber of the cylinder device are opposite to each other. Since it is provided between the second cylinder chamber on the side and a switching valve that supplies a working fluid from the pump to the second cylinder chamber when the control unit detects the measurement-in-progress state, it is mounted on the mounting table. When the DUT is placed,
A situation in which the support table slowly descends toward the load detection device at a unit time flow rate determined by the throttle valve, the load detection device is loaded with the platform, and the impact force acting on the platform acts on the load detection device. Can be avoided.
【0022】さらに、荷重検出装置に載台が負荷されて
制御部が測定中状態を検出すると、切換弁が切り換えら
れてポンプから第2のシリンダ室に作動流体が押し込ま
れ、シリンダ装置のステムが引き込まれて圧縮ばねをさ
らに圧縮して、支持台を載台に接触しない位置に降下さ
せるため、緩衝のための装置を載台から完全に分離した
状態で測定することができ、被測定物の全荷重が荷重検
出装置に作用するため、従来よりも高精度の測定を実現
できるものである。
Further, when the platform is loaded on the load detecting device and the control section detects the measuring state, the switching valve is switched and the working fluid is pushed from the pump into the second cylinder chamber, and the stem of the cylinder device is pushed. Since the compression spring is further retracted to further compress the compression spring and lower the support table to a position where it does not contact the mounting table, it is possible to perform measurement while the device for cushioning is completely separated from the mounting table, and Since all the loads act on the load detection device, it is possible to realize more accurate measurement than ever before.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明の衝撃緩衝装置付き計重装置の待機状態
の構成図である。
FIG. 1 is a configuration diagram of a weighing device with a shock absorbing device of the present invention in a standby state.
【図2】同装置の制御部が測定中状態を検出する状態の
途中経過の説明図である。
FIG. 2 is an explanatory diagram of the progress of a state in which the control unit of the apparatus detects a measuring state.
【図3】同装置の測定値読み取り状態の説明図である。FIG. 3 is an explanatory diagram of a measurement value reading state of the apparatus.
【図4】従来の衝撃緩衝装置付き計重装置の構成図であ
る。
FIG. 4 is a configuration diagram of a conventional weighing device with a shock absorbing device.
【符号の説明】[Explanation of symbols]
1 載台 7 台秤 〔荷重検出装置〕 8 固定側 9 被測定物 10 支持台 11 圧縮ばね 12 シリンダ装置 a 第1のシリンダ室 b 第2のシリンダ室 13 第1の配管 14 第2の配管 15 絞り弁 16 タンク 17 逆止弁 18 電磁弁〔切換弁〕 19 ポンプ 22 制御部 1 platform 7 scales [load detection device] 8 fixed side 9 object to be measured 10 support table 11 compression spring 12 cylinder device a first cylinder chamber b second cylinder chamber 13 first pipe 14 second pipe 15 throttle Valve 16 Tank 17 Check valve 18 Solenoid valve (switching valve) 19 Pump 22 Controller

Claims (1)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 載台が載置される支持台と固定側の間に
    圧縮ばねを介装して前記載台を荷重検出装置の着力部か
    ら持ち上げるとともに、前記支持台と固定側の間に前記
    圧縮ばねと並列にシリンダ装置を介装し、前記シリンダ
    装置の両シリンダ室のうちの載台からの荷重によって圧
    縮される第1のシリンダ室への作動流体路に絞り弁を介
    装し、荷重検出装置の検出荷重が規定重量を越えた測定
    中状態を検出する制御部を設け、作動流体を送り出すポ
    ンプとシリンダ装置の前記第1のシリンダ室とは反対側
    の第2のシリンダ室との間に介装されて、前記制御部が
    測定中状態を検出したときにポンプから第2のシリンダ
    室に作動流体を供給する切換弁を設けた衝撃緩衝装置付
    き計重装置。
    1. A compression spring is interposed between a support table on which the table is mounted and a fixed side to lift the table from the force applying portion of the load detecting device, and between the support table and the fixed side. A cylinder device is provided in parallel with the compression spring, and a throttle valve is provided in a working fluid path to a first cylinder chamber that is compressed by a load from a mounting table of both cylinder chambers of the cylinder device, A control unit that detects a measuring state in which the load detected by the load detection device exceeds the specified weight is provided, and a pump for sending the working fluid and a second cylinder chamber on the opposite side of the first cylinder chamber of the cylinder device are provided. A weighing device with a shock absorbing device, which is interposed between the control unit and a switching valve that supplies a working fluid from the pump to the second cylinder chamber when the control unit detects a measuring state.
JP25821791A 1991-10-07 1991-10-07 Weighing device with shock absorber Expired - Lifetime JP2607781B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25821791A JP2607781B2 (en) 1991-10-07 1991-10-07 Weighing device with shock absorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25821791A JP2607781B2 (en) 1991-10-07 1991-10-07 Weighing device with shock absorber

Publications (2)

Publication Number Publication Date
JPH0599733A true JPH0599733A (en) 1993-04-23
JP2607781B2 JP2607781B2 (en) 1997-05-07

Family

ID=17317146

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25821791A Expired - Lifetime JP2607781B2 (en) 1991-10-07 1991-10-07 Weighing device with shock absorber

Country Status (1)

Country Link
JP (1) JP2607781B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106840353A (en) * 2017-01-19 2017-06-13 宁波良和工程检测技术有限公司 A kind of electronic platform scale and its Weighing method
CN111579041A (en) * 2020-05-18 2020-08-25 苏州煜水生物科技有限公司 Intelligent interaction device for physical examination

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106840353A (en) * 2017-01-19 2017-06-13 宁波良和工程检测技术有限公司 A kind of electronic platform scale and its Weighing method
CN106840353B (en) * 2017-01-19 2019-04-12 浙江润达检测科技有限公司 A kind of electronic platform scale and its weighing method
CN111579041A (en) * 2020-05-18 2020-08-25 苏州煜水生物科技有限公司 Intelligent interaction device for physical examination

Also Published As

Publication number Publication date
JP2607781B2 (en) 1997-05-07

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