JPH0599734A - Weighing instrument with shock absorber - Google Patents

Weighing instrument with shock absorber

Info

Publication number
JPH0599734A
JPH0599734A JP25821891A JP25821891A JPH0599734A JP H0599734 A JPH0599734 A JP H0599734A JP 25821891 A JP25821891 A JP 25821891A JP 25821891 A JP25821891 A JP 25821891A JP H0599734 A JPH0599734 A JP H0599734A
Authority
JP
Japan
Prior art keywords
cylinder chamber
cylinder
working fluid
switching
valve
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
JP25821891A
Other languages
Japanese (ja)
Other versions
JP2608652B2 (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 JP25821891A priority Critical patent/JP2608652B2/en
Publication of JPH0599734A publication Critical patent/JPH0599734A/en
Application granted granted Critical
Publication of JP2608652B2 publication Critical patent/JP2608652B2/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:In a standby state, a supporting table 10 is pushed up by means of a compression spring and a stage 1 is separated from load detecting device 7. When an object 9 to be measured is placed on the stage 1, a compressive force is applied to the first cylinder chamber of a cylinder device 12 through the table 10 and the working fluid in the first cylinder chamber is pushed out by a flow rate decided by a flow metering valve 16. As a result, the table 10 slowly descends toward the device 7 and the stage 1 is loaded onto the device 7. When a control section 23 detects the in-measurement state, a working fluid is forcibly supplied to the second cylinder chamber of the device 12 and the table 10 is lowered to a position at which the table 10 does not come into contact with the stage 1. When the section 23 sets a change-over valve 15 to its third switched state thereafter, the working fluid is forcibly supplied to the first cylinder chamber by means of the pump and the stage 1 is quickly separated from the device 7.

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5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. 5, it is possible to protect the load cell 4, which is a load detecting device, from an impact force by interposing a damper 3 between the mounting base 1 and the fixed base 2. 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のシリンダ室とこの第1のシリンダ室とは
反対側の第2のシリンダ室の両方を作動流体のタンクに
連通する第1の切換状態と第1のシリンダ室を前記タン
クに連通してポンプの吐出口に第2のシリンダ室を接続
する第2の切換状態と第2のシリンダ室を前記タンクに
連通してポンプの吐出口に第1のシリンダ室を接続する
第3の切換状態とに作動流体の流路を切り換える切換弁
を設け、第1のシリンダ室からの作動流体の吐出経路ま
たは第2のシリンダ室への作動流体の吸入経路に絞り弁
を設け、第1のシリンダ室への作動流体の吸入を妨げな
い方向に前記絞り弁に並列に接続された逆止弁を設け、
待機中は前記切換弁を第1の切換状態にし、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
と前記切換弁を第2の切換状態にし、その後に前記切換
弁を第3の切換状態に切り換える制御部を設けたことを
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. In the first switching state in which both the cylinder chamber and the second cylinder chamber on the side opposite to the first cylinder chamber are communicated with the tank of the working fluid, and the first cylinder chamber is communicated with the tank to communicate with the tank. Acts in a second switching state in which the second cylinder chamber is connected to the discharge port and in a third switching state in which the second cylinder chamber is connected to the tank and the first cylinder chamber is connected to the discharge port of the pump. A switching valve for switching the fluid flow path is provided to A throttle valve is provided in the discharge passage of the working fluid from the binder chamber or the suction passage of the working fluid to the second cylinder chamber, and is arranged in parallel with the throttle valve in a direction that does not hinder the suction of the working fluid to the first cylinder chamber. Provide a connected check valve,
During standby, the switching valve is set to the first switching state, and when the detection state of the load detected by the load detecting device exceeds the specified weight, the switching valve is set to the second switching state, and then the switching valve is set to the first switching state. It is characterized in that a control unit for switching to the switching state of No. 3 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、切換弁が第2の切換状態にな
って、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、この状態で実施され、そ
の後に制御部が切換弁を第3の切換状態にすると、第1
のシリンダ室にポンプによって作動流体が送り込まれて
載台が急速に荷重検出装置から分離される。
When the platform is loaded on the load detecting device and the control section detects the measuring state, the switching valve enters the second switching state, and the working fluid is pushed from the pump into the second cylinder chamber to cause the cylinder to move. The stem of the device is retracted to further compress the compression spring and lower the support to a position where it does not contact the platform. The reading of the weight value is carried out in this state, and when the control unit subsequently puts the switching valve in the third switching state, the first
The working fluid is sent by a pump to the cylinder chamber, and the platform is rapidly separated from the load detection device.
【0010】[0010]
【実施例】以下、本発明の実施例を図1〜図4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。
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.
【0012】第1,第2の配管13,14の作動流体の流れ
は、切換弁としての復動3位置5方向形の電磁弁15によ
って選択されており、この電磁弁15は、台秤7の計重信
号Sに基づいて切り換えを実施している。
The flow of the working fluid in the first and second pipes 13 and 14 is selected by a return three-position five-way type solenoid valve 15 as a switching valve. Switching is performed based on the weighing signal S.
【0013】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の無目重量を“ W0
”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。
[0013] Incidentally, the total upward force generated by the compression spring 11 "F", the transom weight of the platform 1 "W 0
Is set to “F> W 0 ”, 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 ".
【0014】この待機状態では電磁弁15はニュートラル
ポジションP0になっており、第1の配管13は絞り弁16
と電磁弁15を介してタンク17に連通されている。絞り弁
16には、第1の配管13からタンク17に向かっての作動流
体18の流れを禁止する方向に逆止弁19が並列接続されて
いる。第2の配管14は電磁弁15を介してタンク17に連通
されている。
In this standby state, the solenoid valve 15 is in the neutral position P0, and the first pipe 13 is provided with the throttle valve 16
And a tank 17 via a solenoid valve 15. Throttle valve
A check valve 19 is connected in parallel to 16 in a direction that prohibits the flow of the working fluid 18 from the first pipe 13 toward the tank 17. The second pipe 14 is connected to the tank 17 via a solenoid valve 15.
【0015】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20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16によって規定された流量づつタンク17へ配管21を介
して緩やかに戻されて、第2のシリンダ室bには配管22
と電磁弁15を介してタンク17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 supporting base 10 is pushed down against the bias of the compression spring 11, and the stem 20 of the cylinder device 12 is moved to the first cylinder chamber. The working fluid in the first cylinder chamber a is gently returned to the tank 17 at a flow rate regulated by the throttle valve 16 via the pipe 21, and is then piped into the second cylinder chamber b.
The working fluid is sucked up from the tank 17 via the electromagnetic valve 15, the platform 1 is gently lowered onto the platform 7, and the platform 1 is loaded on the platform 7 as shown in FIG.
【0016】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23が検出すると、電磁弁
15が図3に示す第1ポジションP1に切り換えられる。
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 23 detects a measuring state in which the specified weight near the zero point is reached, the solenoid valve is activated.
15 is switched to the first position P1 shown in FIG.
【0017】電磁弁15が第1ポジションP1に切り換え
られると、ポンプ24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。
When the solenoid valve 15 is switched to the first position P1, the working fluid is pushed from the pump 24 into the second cylinder chamber b through the second pipe 14 and resists the bias of the compression spring 11. Support base 10 slowly descends further,
Is separated from the platform 1 and the total load of the object 9 to be measured acts on the platform scale 7.
【0018】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16で規定されている
速度でしか作動流体18がタンク17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 18 is discharged to the tank 17 only at the speed regulated by the throttle valve 16 in this manner, even when the DUT 9 is roughly placed on the platform 1, the working fluid 18 is applied to the force application 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.
【0019】この実施例では、台秤7の計重値が零点付
近以外でバランスしたことを制御部23が検出すると、規
定時間後にあるいはその計重値を保持した直後に、電磁
弁15が図4に示すように第2ポジジョンP2に切り換え
られる。
In this embodiment, when the control unit 23 detects that the weighing value of the platform scale 7 is balanced other than near the zero point, the solenoid valve 15 is activated by the solenoid valve 15 as shown in FIG. The second position P2 is switched to, as shown in FIG.
【0020】電磁弁15が第2ポジジョンP2に切り換え
られると、ポンプ24の吐出口が電磁弁15と逆止弁19を介
して第1の配管13に接続され、第2の配管14は電磁弁15
と配管22を介してタンク17に連通される。したがって、
ポンプ24によって第1のシリンダ室aに作動流体18が送
り込まれて支持台10が急速に上昇し、載台1が持ち上げ
られて載台1が台秤7から分離される。
When the solenoid valve 15 is switched to the second position P2, the discharge port of the pump 24 is connected to the first pipe 13 via the solenoid valve 15 and the check valve 19, and the second pipe 14 is connected to the solenoid valve. 15
And the tank 17 through the pipe 22. Therefore,
The working fluid 18 is sent to the first cylinder chamber a by the pump 24, the support base 10 is rapidly raised, the platform 1 is lifted, and the platform 1 is separated from the platform scale 7.
【0021】載台1が規定位置まで上昇して台秤7から
分離された状態は、図1に示すリミットスイッチ25が検
出し、制御部23はこのリミットスイッチ25の検出出力を
読み取って、載台1が規定位置まで上昇したことを確認
すると、電磁弁15をニュートラルポジションP0に復帰
させる。
The state where the platform 1 is lifted to the specified position and separated from the platform scale 7 is detected by the limit switch 25 shown in FIG. 1, and the control unit 23 reads the detection output of the limit switch 25 and When it is confirmed that 1 has risen to the specified position, the solenoid valve 15 is returned to the neutral position P0.
【0022】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。
前記の作動流体18としては適当な粘性の液体を使用する
ことが好ましい。
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.
As the working fluid 18, it is preferable to use a liquid having an appropriate viscosity.
【0023】上記の実施例ではリミットスイッチ25の検
出出力を読み取って電磁弁15を第2ポジションP2から
ニュートラルポジションP0に復帰させたが、これはリ
ミットスイッチ25を設けずに電磁弁15を第1ポジション
P1から第2ポジションP2に切り換えてから、規定時
間の経過を検出して第2ポジションP2からニュートラ
ルポジションP0に復帰させるように制御部23を構成し
ても同様である。
In the above embodiment, the detection output of the limit switch 25 is read and the solenoid valve 15 is returned from the second position P2 to the neutral position P0. The same applies to the case where the control unit 23 is configured to detect the elapse of the specified time and return from the second position P2 to the neutral position P0 after switching from the position P1 to the second position P2.
【0024】上記の実施例では、絞り弁16を第1のシリ
ンダ室aと電磁弁15の間に介装して第1のシリンダ室a
からタンク17への吐出流量を制限したが、これは第2の
シリンダ室bへの作動流体の流入経路に絞り弁16を設け
ても同様の効果を期待できる。この場合にも逆止弁19は
第1のシリンダ室aへの作動流体の吸入を妨げない方向
に絞り弁16とに並列に接続される。この場合の絞り弁16
と逆止弁19を破線で図1に示す。
In the above-described embodiment, the throttle valve 16 is interposed between the first cylinder chamber a and the solenoid valve 15 so that the first cylinder chamber a
Although the discharge flow rate from the tank to the tank 17 is limited, the same effect can be expected even if the throttle valve 16 is provided in the inflow path of the working fluid to the second cylinder chamber b. Also in this case, the check valve 19 is connected in parallel with the throttle valve 16 in a direction that does not hinder the suction of the working fluid into the first cylinder chamber a. Throttle valve 16 in this case
The check valve 19 and the check valve 19 are shown in broken lines in FIG.
【0025】上記の実施例では、台秤7の計重値が零点
付近以外でバランスしたことを制御部23が検出すると、
規定時間後にあるいはその計重値を保持した直後に、電
磁弁15が第2ポジジョンP2に自動的に切り換えられる
として説明したが、これは係員のスイッチ操作によって
第2ポジジョンP2に切り換えるように構成することも
できる。
In the above embodiment, when the control section 23 detects that the weight value of the platform scale 7 is balanced except near the zero point,
Although it has been described that the solenoid valve 15 is automatically switched to the second position P2 after a stipulated time or immediately after the weight value is held, this is configured to be switched to the second position P2 by a switch operation of a staff member. You can also
【0026】なお、測定が完了して載台1から被計量物
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23が検出して電磁弁15を第2
のポジションP2に切り換えるように構成することもで
きる。
When the measurement is completed and the object 9 to be weighed is removed from the platform 1, the weighing signal S falls below the specified weight, and the control unit 23 detects this state and sets the solenoid valve 15 to the first position. Two
It is also possible to switch to the position P2.
【0027】[0027]
【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
室とこの第1のシリンダ室とは反対側の第2のシリンダ
室の両方を作動流体のタンクに連通する第1の切換状態
と第1のシリンダ室を前記タンクに連通してポンプの吐
出口に第2のシリンダ室を接続する第2の切換状態と第
2のシリンダ室を前記タンクに連通してポンプの吐出口
に第1のシリンダ室を接続する第3の切換状態とに作動
流体の流路を切り換える切換弁を設け、第1のシリンダ
室からの作動流体の吐出経路または第2のシリンダ室へ
の作動流体の吸入経路に絞り弁を設け、第1のシリンダ
室への作動流体の吸入を妨げない方向に前記絞り弁に並
列に接続された逆止弁を設け、待機中は前記切換弁を第
1の切換状態にし、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と前記切換弁を第2の切
換状態にし、その後に前記切換弁を第3の切換状態に切
り換える制御部を設けたため、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 first cylinder chamber in which a cylinder device is interposed in parallel with the compression spring between the support base and the fixed side and is compressed by a load from a mounting base of both cylinder chambers of the cylinder device, and the first cylinder chamber. Of the second cylinder chamber on the opposite side of the second cylinder chamber to the working fluid tank and the first switching state in which the first cylinder chamber is communicated to the tank, and the second cylinder is connected to the discharge port of the pump. Switching for switching the flow path of the working fluid between a second switching state in which the chamber is connected and a third switching state in which the second cylinder chamber is connected to the tank and the first cylinder chamber is connected to the discharge port of the pump. A direction in which a valve is provided and a throttle valve is provided in the discharge passage of the working fluid from the first cylinder chamber or the suction passage of the working fluid to the second cylinder chamber so as not to prevent the suction of the working fluid into the first cylinder chamber. Reverse connected in parallel to the throttle valve A valve is provided, the switching valve is set to the first switching state during standby, and when the detection state of the load detected by the load detecting device exceeds the specified weight, the switching valve is set to the second switching state, and then the switching valve is set to the second switching state. Since the control unit for switching the switching valve to the third switching state is provided, when the object to be measured is placed on the mounting table, the supporting table gently descends toward the load detection device at a unit time flow rate determined by the throttle valve. Thus, it is possible to avoid a situation in which the load detection device is loaded with the platform and the impact force acting on the platform acts on the load detection device.
【0028】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。
Further, when the platform is loaded on the load detecting device and the control unit 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 the total load acts on the load detection device, it is possible to realize more accurate measurement than before.
【0029】測定が完了すると、第1のシリンダ室にポ
ンプで作動流体を送り込んで支持台を上昇させて載台を
荷重検出装置から急速に分離させることができ、特に短
時間の間に繰り返しの計量が必要な場合に有効である。
When the measurement is completed, the working fluid can be pumped into the first cylinder chamber to raise the support table to rapidly separate the mounting table from the load detecting device. It is effective when weighing is required.
【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】同装置の測定値読み取りが完了してから初期状
態への復帰動作の説明図である。
FIG. 4 is an explanatory diagram of an operation of returning to an initial state after the measurement value reading of the apparatus is completed.
【図5】従来の衝撃緩衝装置付き計重装置の構成図であ
る。
FIG. 5 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 電磁弁〔切換弁〕 16 絞り弁 17 タンク 19 逆止弁 23 制御部 24 ポンプ P0 ニュートラルポジション〔第1の切換状態〕 P1 第1ポジション〔第2の切換状態〕 P2 第2ポジション〔第3の切換状態〕 1 platform 7 scales [load detection device] 8 fixed side 9 object to be measured 10 support platform 11 compression spring 12 cylinder device a first cylinder chamber b second cylinder chamber 13 first pipe 14 second pipe 15 electromagnetic Valve [Switching valve] 16 Throttle valve 17 Tank 19 Check valve 23 Control unit 24 Pump P0 Neutral position [First switching state] P1 First position [Second switching state] P2 Second position [Third switching state] ]

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のシリンダ室とこの第1のシリンダ室とは
    反対側の第2のシリンダ室の両方を作動流体のタンクに
    連通する第1の切換状態と第1のシリンダ室を前記タン
    クに連通してポンプの吐出口に第2のシリンダ室を接続
    する第2の切換状態と第2のシリンダ室を前記タンクに
    連通してポンプの吐出口に第1のシリンダ室を接続する
    第3の切換状態とに作動流体の流路を切り換える切換弁
    を設け、第1のシリンダ室からの作動流体の吐出経路ま
    たは第2のシリンダ室への作動流体の吸入経路に絞り弁
    を設け、第1のシリンダ室への作動流体の吸入を妨げな
    い方向に前記絞り弁に並列に接続された逆止弁を設け、
    待機中は前記切換弁を第1の切換状態にし、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
    と前記切換弁を第2の切換状態にし、その後に前記切換
    弁を第3の切換状態に切り換える制御部を設けた衝撃緩
    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 first cylinder chamber in which a cylinder device is interposed in parallel with the compression spring and is compressed by a load from a mounting table of both cylinder chambers of the cylinder device, and a first cylinder chamber on the opposite side of the first cylinder chamber. A first switching state in which both of the two cylinder chambers are in communication with a tank for working fluid, and a second switching state in which the first cylinder chamber is in communication with the tank and the second cylinder chamber is connected to the discharge port of the pump. And a switching valve for switching the flow path of the working fluid to a third switching state in which the second cylinder chamber is connected to the tank and the first cylinder chamber is connected to the discharge port of the pump, and the first cylinder chamber is provided. Discharge path of working fluid from the second cylinder A throttle valve is provided in the suction passage of the working fluid into the chamber, and a check valve connected in parallel to the throttle valve is provided in a direction that does not hinder the suction of the working fluid into the first cylinder chamber,
    During standby, the switching valve is set to the first switching state, and when the measuring state in which the load detected by the load detection device exceeds the specified weight is detected, the switching valve is set to the second switching state, and then the switching valve is set to the first switching state. A weighing device with a shock absorbing device provided with a control unit for switching to the switching state of 3.
JP25821891A 1991-10-07 1991-10-07 Weighing device with shock absorber Expired - Lifetime JP2608652B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25821891A JP2608652B2 (en) 1991-10-07 1991-10-07 Weighing device with shock absorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25821891A JP2608652B2 (en) 1991-10-07 1991-10-07 Weighing device with shock absorber

Publications (2)

Publication Number Publication Date
JPH0599734A true JPH0599734A (en) 1993-04-23
JP2608652B2 JP2608652B2 (en) 1997-05-07

Family

ID=17317159

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25821891A Expired - Lifetime JP2608652B2 (en) 1991-10-07 1991-10-07 Weighing device with shock absorber

Country Status (1)

Country Link
JP (1) JP2608652B2 (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
CN109655146A (en) * 2018-12-26 2019-04-19 宁波恒融机械有限公司 The bearing equipment protective device of air bag buffer-type overburden load-bearing

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
CN109655146A (en) * 2018-12-26 2019-04-19 宁波恒融机械有限公司 The bearing equipment protective device of air bag buffer-type overburden load-bearing

Also Published As

Publication number Publication date
JP2608652B2 (en) 1997-05-07

Similar Documents

Publication Publication Date Title
Take et al. Tensiometer saturation and the reliable measurement of soil suction
US7143653B2 (en) Enhanced triaxial tester with volume change device for measurement of flow properties of dry cohesive particulate systems under low confining pressures
US5005424A (en) Machine and method for uniaxial mechanical material testing
CN101451893B (en) Test system and test method for hydraulic cylinder with loading friction force characteristic
CN103389183B (en) Spacecraft quality characteristic comprehensive test board based on spherical air bearing
RU2620871C2 (en) Quick detection of leaks in rigid/flexible packaging without test gas adding
JP4864984B2 (en) Weighing sensor
JP2722937B2 (en) Wrinkle press load measuring device for press machine
US2616683A (en) Mechanism for weighing bulk cargo
CA1057835A (en) Fail-safe overload protective system having bridge unbalance compensating means
KR100898318B1 (en) Safety valve testing apparatus
US6858809B2 (en) Dump truck with payload weight measuring system and method of using same
US7360443B2 (en) Test bench and method for carrying out aerodynamic measurements on vehicles
US5666295A (en) Apparatus and method for dynamic weighing of loads in hydraulically operated lifts
US5159828A (en) Microaccumulator for measurement of fluid volume changes under pressure
WO2002018892A3 (en) Displacement transducer
US5861580A (en) Load cell and weighing system
US2212085A (en) Load indicating and controlling apparatus for testing machines
US3831687A (en) Flexure base scale
CN201765050U (en) Large-sized weighter calibration system and self-positioning loading-unloading load measuring device of same
US3782486A (en) Measuring transient loads
EA007818B1 (en) Moveable working device with supporting extension arms
CN104155427A (en) Low back pressure saturation method for loess liquidation experiment
JP3041417B2 (en) Permeability test equipment for rock specimens
CN201819853U (en) Novel osmotic suction controlled comprehensive tester for unsaturated soil