JP2015190960A - Weighing device equipped with side-surface windproof body - Google Patents
Weighing device equipped with side-surface windproof body Download PDFInfo
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- JP2015190960A JP2015190960A JP2014070519A JP2014070519A JP2015190960A JP 2015190960 A JP2015190960 A JP 2015190960A JP 2014070519 A JP2014070519 A JP 2014070519A JP 2014070519 A JP2014070519 A JP 2014070519A JP 2015190960 A JP2015190960 A JP 2015190960A
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- 238000005303 weighing Methods 0.000 title claims abstract description 92
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000004140 cleaning Methods 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
Description
本発明は、秤量皿の下側に入り込む空気流を阻止するため、秤量皿の側面を塞ぐ位置に側面風防体を設置する秤量装置に関し、簡単な操作で側面風防体の取り付けや取り外しができるようにしたものである。 The present invention relates to a weighing apparatus in which a side windshield is installed at a position where the side of the weighing dish is blocked in order to prevent an air flow entering the lower side of the weighing dish, so that the side windshield can be attached or detached with a simple operation. It is a thing.
下記特許文献１には、図１６に示すように、秤量皿１０が１０Ｘ字状の皿受け部材１１で支持され、皿受け部材１１が計量ブロック４０の荷重支承部４４２に固定される秤量装置が記載されている。この装置では、荷重支承部４４２によりダイアフラム４８の中心孔の周縁が挟持され、ダイアフラム４８の外周縁がパッキン４７を介して円環状部材４６に固定され、円環状部材４６が上部筐体１２１に固定されるため、上部筐体１２１の開口１２２と計量ブロック４０との間が気密に保たれる。
この秤量装置では、計量中に液体試料や粉体試料等を誤ってこぼし、それらが秤量皿１０の下側に入り込んだ場合でも、秤量皿１０が取り外せるため、筐体上面の掃除を簡単に行うことができる。
In Patent Document 1 below, as shown in FIG. 16, there is a weighing device in which a weighing dish 10 is supported by a 10 × -shaped dish receiving member 11 and the dish receiving member 11 is fixed to a load support portion 442 of a measuring block 40. Have been described. In this apparatus, the peripheral edge of the center hole of the diaphragm 48 is clamped by the load support portion 442, the outer peripheral edge of the diaphragm 48 is fixed to the annular member 46 through the packing 47, and the annular member 46 is fixed to the upper housing 121. Therefore, the space between the opening 122 of the upper housing 121 and the measuring block 40 is kept airtight.
In this weighing apparatus, even if a liquid sample, a powder sample, or the like is accidentally spilled during weighing and enters the lower side of the weighing dish 10, the weighing dish 10 can be removed, so that the upper surface of the housing is easily cleaned. be able to.
また、分解能が高い秤量装置では、秤量皿と上部筐体との隙間に空気の流れが入り込むと、測定誤差が生じることが知られている。
これを避けるため、秤量皿の側面を塞ぐように秤量皿の周囲に側面風防体を配置することが従来から行われている（下記特許文献２参照）。
Further, it is known that in a weighing apparatus with high resolution, a measurement error occurs when an air flow enters a gap between the weighing pan and the upper housing.
In order to avoid this, it has been conventionally performed to arrange a side windshield around the weighing pan so as to block the side surface of the weighing pan (see Patent Document 2 below).
側面風防体を設けた秤量装置では、側面風防体が計量中の秤量皿に触れないように確実に固定することが求められる。一方、計量中に液体試料や粉体試料等がこぼれた場合、側面風防体を秤量皿と共に取り外して筐体上面を掃除しなければならないため、側面風防体の筐体上面への固定は、簡単な操作で取り付け・取り外しできることが求められる。
また、秤量皿が円形の場合、秤量皿の周囲を塞ぐ環状側面風防体を筐体上面に取り付ける必要があり、秤量皿が四角形の場合、秤量皿の周囲を塞ぐ角型側面風防体を筐体上面に取り付ける必要があるが、それらを筐体上面に取り付ける部品が側面風防体の種類によって違っていると、秤量装置のメーカーでは、保管・管理する部品の数が増加し、また、その部品を筐体上面に固定する装着工程などを区別しなければならないため、コスト高の原因になる。
In a weighing device provided with a side windshield, it is required to securely fix the side windshield so that it does not touch the weighing pan being measured. On the other hand, if a liquid sample or powder sample spills during measurement, the side windshield must be removed together with the weighing pan and the top of the case must be cleaned. It is required to be able to attach and remove with simple operation.
In addition, when the weighing pan is circular, it is necessary to attach an annular side windshield covering the circumference of the weighing dish to the top of the housing. If it is necessary to mount the unit on the top surface, but the parts that attach them to the top surface of the housing differ depending on the type of side draft shield, the manufacturer of the weighing device will increase the number of parts to be stored and managed. Since it is necessary to distinguish the mounting process and the like to be fixed to the upper surface of the housing, it causes a high cost.
本発明は、こうした事情を考慮して創案したものであり、簡単な操作で側面風防体の取り付け・取り外しが可能であり、また、種類の異なる側面風防体の取り付け・取り外しに共通の部品が使用できる秤量装置を提供することを目的としている。 The present invention was devised in consideration of such circumstances, and it is possible to attach and detach side windshields with a simple operation, and common parts are used to attach and remove different types of side windshields. An object of the present invention is to provide a weighing device that can be used.
本発明は、計量機構を覆う筐体と、計量機構で計量される被計量物が載置される秤量皿と、計量機構と機械的に結合して秤量皿を筐体の上面上で支持する皿受け部材と、秤量皿の周囲を囲う側面風防体と、側面風防体を位置決めするために筐体の上面に設けられた複数の位置決め部材と、を備える秤量装置であって、側面風防体は、秤量皿の外周を囲む四角形状の角型側面風防体から成り、この角型側面風防体は、二つに分割可能な角型側面風防形成部材が組合わされて構成される。
そして、位置決め部材は、円環状部分と円環状部分の内周側に延びる複数の係合片とを備える環状側面風防体を、計量機構に皿受け部材を結合させた状態で装着するときに使用される部材であり、角型側面風防体は、計量機構に皿受け部材を結合させた状態で、二つの角型側面風防形成部材を、筐体の上面に沿って左右から接近させて位置決め部材に装着される。
この秤量装置では、皿受け部材を取り外さずに、角型側面風防体を筐体上面に取り付けることができ、また、その取り付けには、環状側面風防体の装着に使用される位置決め部材を用いることができる。
The present invention supports a weighing pan on the upper surface of the casing by mechanically coupling the weighing mechanism, a weighing pan on which an object to be weighed by the weighing mechanism is placed, and a weighing pan. A weighing device comprising: a tray receiving member; a side windshield surrounding the weighing pan; and a plurality of positioning members provided on an upper surface of the housing for positioning the side windshield; The square side windshield body is a quadrangular rectangular side windshield body that surrounds the outer periphery of the weighing pan, and this square side windshield body is configured by combining square side windshield forming members that can be divided into two.
The positioning member is used when an annular side windshield including an annular portion and a plurality of engagement pieces extending toward the inner peripheral side of the annular portion is mounted in a state where the dish receiving member is coupled to the measuring mechanism. The square side windshield body is a positioning member in which two square side windshield forming members are approached from the left and right along the upper surface of the housing in a state in which the dish receiving member is coupled to the measuring mechanism. It is attached to.
In this weighing apparatus, the square side windshield can be attached to the upper surface of the housing without removing the pan support member, and a positioning member used for mounting the annular side windshield is used for the attachment. Can do.
また、本発明の秤量装置では、位置決め部材は、筐体の上面に固定される固定面と、固定面に片持ち支持されて、筐体の上面と空隙を空けて対向する並行面と、並行面に形成された係合用の穴または突部と、を有し、複数の位置決め部材は、筐体の上面における、皿受け部材の中心位置を中心とする同一円上に所定の間隔を空けて、且つ、固定面と並行面との円周方向の向きを揃えて配置される。
環状側面風防体を装着するときは、環状側面風防体の各係合片が各位置決め部材の並行面と筐体上面との空隙に入り込むように、環状側面風防体を回転させる。
Further, in the weighing apparatus of the present invention, the positioning member includes a fixed surface fixed to the upper surface of the housing, a parallel surface that is cantilevered by the fixed surface and faces the upper surface of the housing with a gap therebetween, And a plurality of positioning members are spaced apart from each other on the same circle around the center position of the dish receiving member on the upper surface of the housing. In addition, the fixed surface and the parallel surface are arranged with their circumferential directions aligned.
When mounting the annular side windshield, the annular side windshield is rotated so that the engagement pieces of the annular side windshield enter the gap between the parallel surface of each positioning member and the upper surface of the housing.
また、本発明の秤量装置では、二つの角型側面風防形成部材は、同一形状であり、角型側面風防形成部材の各々は、角型側面風防体の半分を構成する半角型側面風防体と、この半角型側面風防体により三方が囲まれた平板部と、平板部の半角型側面風防体で囲まれていない縁部に形成された切込みと、切込みにより平板部に形成された、位置決め部材の並行面と筐体の上面との空隙に挿入される係合片と、係合片に形成された、並行面の係合用の穴または突部に係合する突部または穴と、を備える。
二つの角型側面風防形成部材を、筐体の上面に沿って左右から接近させたとき、係合片が位置決め部材の並行面と筐体上面との空隙に入り込み、係合片に形成された突部または穴が並行面の穴または突部に係合して、角型側面風防形成部材は位置決めされる。
Further, in the weighing apparatus of the present invention, the two square side windshield forming members have the same shape, and each of the square side windshield forming members is a half-square side windshield constituting half of the square side windshield. , A flat plate portion surrounded on three sides by this half square side windshield, a cut formed on the edge of the flat plate portion not surrounded by the half square side wind shield, and a positioning member formed on the flat plate portion by the cut An engaging piece inserted into a gap between the parallel surface of the housing and the upper surface of the housing, and a protrusion or hole that is formed in the engaging piece and engages the hole or protrusion for engaging the parallel surface. .
When two square side windshield forming members are approached from the left and right along the upper surface of the housing, the engaging piece enters the gap between the parallel surface of the positioning member and the upper surface of the housing, and is formed in the engaging piece. The square side windshield forming member is positioned by engaging the protrusions or holes with the parallel holes or protrusions.
また、本発明の秤量装置では、環状側面風防体の外周に複数の凹部または凸部を設け、筐体の上面に載置される箱型防風ケースの下面の内周に、その凹部または凸部に嵌合する複数の凸部または凹部を設け、環状側面風防体が位置決めされた筐体の上面上で凹部と凸部とを嵌合させて、防風ケースを位置決めすることができる。 In the weighing device of the present invention, a plurality of recesses or protrusions are provided on the outer periphery of the annular side windshield, and the recesses or protrusions are provided on the inner periphery of the lower surface of the box-type windproof case placed on the upper surface of the housing. The windproof case can be positioned by providing a plurality of convex portions or concave portions to be fitted to each other and fitting the concave portions and the convex portions on the upper surface of the casing on which the annular side windshield body is positioned.
本発明の秤量装置は、皿受け部材を計量機構に結合したまま、角型側面風防体の取り付けや取り外しが可能であり、筐体上面の掃除が容易である。また、この角型側面風防体の筐体上面への着脱には、環状側面風防体の着脱に用いる位置決め部材が共用できる。
また、皿受け部材を計量機構から取り外すと、再び取り付けたときの測定精度の低下が懸念されるが、本発明の秤量装置では、こうした心配もない。
In the weighing device of the present invention, it is possible to attach and remove the square side windshield while the dish receiving member is coupled to the weighing mechanism, and it is easy to clean the upper surface of the housing. In addition, a positioning member used for attaching and detaching the annular side windshield can be used for attaching and detaching the square side windshield to the upper surface of the housing.
Moreover, if the dish receiving member is removed from the weighing mechanism, there is a concern that the measurement accuracy will be lowered when it is reattached. However, the weighing apparatus of the present invention does not have such a concern.
図１は、本発明の実施形態に係る秤量装置の筐体５０の平面図を示している。この筐体５０には、秤量皿を取り外したときに筐体内の計量機構の一部が見える円孔５０１が形成されている。円孔５０１の中心には、後述する皿受け部材が固定される荷重支承部材９０１が見えており、その周囲には、ダイアフラムの抑え板９０２や円環状部材９０３が見えている。
筐体５０の上面には、角型側面風防体を位置決めするための４つの位置決め部材６０１、６０２、６０３、６０４が、円孔５０１と同心の円上（即ち、荷重支承部材９０１の中心位置を中心とする円上）に等間隔で配置されている。
この位置決め部材６０１、６０２、６０３、６０４は、環状側面風防体の位置決めに使用するものであり、それが角型側面風防体の位置決めにも使用される。
FIG. 1 shows a plan view of a housing 50 of a weighing apparatus according to an embodiment of the present invention. The casing 50 is formed with a circular hole 501 through which a part of the weighing mechanism in the casing can be seen when the weighing pan is removed. A load support member 901 to which a later-described dish receiving member is fixed is seen at the center of the circular hole 501, and a diaphragm holding plate 902 and an annular member 903 are seen around the load support member 901.
Four positioning members 601, 602, 603, and 604 for positioning the square side windshield are positioned on the upper surface of the housing 50 on a circle concentric with the circular hole 501 (that is, the center position of the load bearing member 901). Are arranged at equal intervals on the center circle).
The positioning members 601, 602, 603, and 604 are used for positioning the annular side windshield, and are also used for positioning the square side windshield.
図２は、位置決め部材６０を拡大して示している。この位置決め部材は、筐体５０の上面に固定される固定面６１０と、筐体５０の上面に空隙を空けて対向する並行面６２０とを有しており、折り曲げられた一枚の板により固定面６１０と並行面６２０とが形成されている。固定面６１０に片持ち支持された並行面６２０は、面に直交する方向に弾性を有している。
また、並行面６２０には、係合用の穴６２１が形成され、固定面６１０には、固定用の凹部６１１が形成されている。
FIG. 2 shows the positioning member 60 in an enlarged manner. This positioning member has a fixed surface 610 fixed to the upper surface of the housing 50 and a parallel surface 620 facing the upper surface of the housing 50 with a gap therebetween, and is fixed by a single bent plate. A surface 610 and a parallel surface 620 are formed. The parallel surface 620 cantilevered by the fixed surface 610 has elasticity in a direction perpendicular to the surface.
Further, the parallel surface 620 is formed with an engagement hole 621, and the fixing surface 610 is formed with a fixing recess 611.
図３（ａ）は、位置決め部材６０が筐体の上面に固定された状態を示し、図３（ｂ）は、その側面図を示している。筐体５０の上面に設けられた突起５０２が固定面６１０の凹部６１１に嵌り、固定面６１０が筐体５０の上面に固定される。
図１に示すように、４つの位置決め部材６０１、６０２、６０３、６０４は、固定面６１０と並行面６２０との円周方向の向きが一致するように同一円上に配置されている。
FIG. 3A shows a state in which the positioning member 60 is fixed to the upper surface of the casing, and FIG. 3B shows a side view thereof. The protrusion 502 provided on the upper surface of the housing 50 fits into the recess 611 of the fixing surface 610, and the fixing surface 610 is fixed to the upper surface of the housing 50.
As shown in FIG. 1, the four positioning members 601, 602, 603, and 604 are arranged on the same circle so that the circumferential directions of the fixed surface 610 and the parallel surface 620 coincide.
まず、この筐体の上面に環状側面風防体を取り付けるときの状態について説明する。
図１０は、円形の秤量皿の側面風防体として用いられる円環状の環状側面風防体７０を示している。図１０（ａ）は平面図、図１０（ｂ）は側面図、図１０（ｃ）は斜視図である。
この環状側面風防体７０は、秤量皿に対向する内周面が略垂直で外周面が傾斜している断面三角形状の円環部７１０と、円環部７１０の内周面の下端から半径方向に延びる４つの係合片７０１、７０２、７０３、７０４と、各係合片に設けられた突部７１１と、円環部７１０の外周面の四箇所に設けられた箱型防風ケース係合用の凹部７１２とを有しており、円環部７１０の内側は、係合片７０１、７０２、７０３、７０４を除く部分が開口している。
この係合片７０１、７０２、７０３、７０４は、位置決め部材６０の並行面６２０と筐体５０の上面との空隙に入り込み、突部７１１が並行面６２０の穴６２１に嵌ることで環状側面風防体７０が筐体上に位置決めされる。
First, a state when the annular side windshield is attached to the upper surface of the housing will be described.
FIG. 10 shows an annular annular side windshield 70 used as a side windshield for a circular weighing pan. 10A is a plan view, FIG. 10B is a side view, and FIG. 10C is a perspective view.
The annular side windshield 70 includes an annular part 710 having a triangular cross section whose inner peripheral surface facing the weighing pan is substantially vertical and whose outer peripheral surface is inclined, and a radial direction from the lower end of the inner peripheral surface of the annular part 710. Four engaging pieces 701, 702, 703, 704, projections 711 provided on each engaging piece, and box-type windproof case provided at four locations on the outer peripheral surface of the annular portion 710 A portion excluding the engaging pieces 701, 702, 703, and 704 is open inside the annular portion 710.
The engagement pieces 701, 702, 703, and 704 enter the gap between the parallel surface 620 of the positioning member 60 and the upper surface of the housing 50, and the protrusion 711 fits into the hole 621 of the parallel surface 620 so that the annular side windshield 70 is positioned on the housing.
図１１は、環状側面風防体７０を筐体上に位置決めするときの操作手順を示している。計量機構の荷重支承部材９０１（図１）には、既に、Ｘ字状の皿受け部材９０４が結合されている（皿受け部材９０４は、その中心が荷重支承部材９０１の中心と一致するように荷重支承部材９０１に結合されている）。この皿受け部材９０４の平面形状は、環状側面風防体７０の内側の開口より小さい面積であるため、皿受け部材９０４が開口を通過するように、環状側面風防体７０を皿受け部材９０４の上方から下げて、図１１（ａ）に示すように、係合片７０１、７０２、７０３、７０４が各位置決め部材６０１、６０２、６０３、６０４の並行面６２０の脇に来るように、環状側面風防体７０を筐体の上に置くことができる。
次いで、環状側面風防体７０を矢印の方向に回転し、図１１（ｂ）に示すように、各係合片７０１、７０２、７０３、７０４を、位置決め部材６０１、６０２、６０３、６０４の並行面６２０と筐体５０との隙間に差し込み、各係合片の突部７１１を並行面６２０の穴６２１に嵌め込む。
こうして、環状側面風防体７０は、筐体５０の上面に位置決めされる。
FIG. 11 shows an operation procedure for positioning the annular side windshield 70 on the housing. An X-shaped dish receiving member 904 is already coupled to the load support member 901 (FIG. 1) of the weighing mechanism (the center of the dish receiving member 904 is coincident with the center of the load supporting member 901). It is coupled to the load bearing member 901). Since the planar shape of the dish receiving member 904 is smaller than the opening inside the annular side windshield 70, the annular side windshield 70 is placed above the dish receiving member 904 so that the dish receiving member 904 passes through the opening. As shown in FIG. 11 (a), the annular side windshield so that the engaging pieces 701, 702, 703, 704 come to the side of the parallel surface 620 of each positioning member 601, 602, 603, 604, as shown in FIG. 70 can be placed on the housing.
Next, the annular side windshield 70 is rotated in the direction of the arrow, and as shown in FIG. 11B, the engaging pieces 701, 702, 703, 704 are parallel to the positioning members 601, 602, 603, 604. The projection 711 of each engagement piece is inserted into the hole 621 of the parallel surface 620 by inserting into the gap between the 620 and the housing 50.
Thus, the annular side windshield 70 is positioned on the upper surface of the housing 50.
図１２は、筐体５０の上面に環状側面風防体７０を位置決めし、皿受け部材９０４の上に秤量皿９０５を載せた秤量装置の断面を示している。この秤量装置では、秤量皿９０５の下側に入り込む気流が環状側面風防体７０で阻止されるため、高精度の計量が可能である。
また、この環状側面風防体７０は、皿受け部材９０４を計量機構に結合したまま、筐体５０の上面に位置決めすることができ、また、逆の手順を辿って、皿受け部材９０４を計量機構に結合したまま、筐体５０の上面に位置決めされた環状側面風防体７０を取り外すことができる。
FIG. 12 shows a cross section of a weighing device in which the annular side windshield 70 is positioned on the upper surface of the housing 50 and the weighing pan 905 is placed on the tray receiving member 904. In this weighing device, since the airflow entering the lower side of the weighing pan 905 is blocked by the annular side windshield 70, highly accurate weighing is possible.
In addition, the annular side windshield 70 can be positioned on the upper surface of the housing 50 while the dish receiving member 904 is coupled to the weighing mechanism, and the dish receiving member 904 is moved to the weighing mechanism by following the reverse procedure. The annular side windshield 70 positioned on the upper surface of the housing 50 can be removed while being coupled to the housing 50.
なお、筐体５０の上面に位置決めされた環状側面風防体７０を用いて、箱型の風防ケースを筐体５０の上面に位置決めすることができる。
この位置決めに用いる箱型風防ケースには、図１３に示すように、箱型風防ケース８０の下面の内周に、環状側面風防体７０の凹部７１２（図１０、図１１）と嵌合する凸部８０１を形成する。
図１４の平面図は、筐体５０の上面において、環状側面風防体７０の凹部７１２と箱型風防ケース８０の凸部８０１とが嵌合している状態を示し、図１５は、筐体５０の上面で環状側面風防体７０により位置決めされた箱型風防ケース８０の斜視図を示している。
なお、ここでは、環状側面風防体７０の側に凹部を設け、箱型風防ケース８０の側に凸部を設けているが、それを逆にして、環状側面風防体７０の側に凸部を設け、箱型風防ケース８０の側に凹部を設けても良い。
The box-shaped windshield case can be positioned on the upper surface of the housing 50 by using the annular side windshield 70 positioned on the upper surface of the housing 50.
In the box-type windshield case used for this positioning, as shown in FIG. 13, a convexity that fits into the inner periphery of the lower surface of the box-type windshield case 80 with the recess 712 (FIGS. 10 and 11) of the annular side windshield 70. A portion 801 is formed.
The plan view of FIG. 14 shows a state in which the concave portion 712 of the annular side windshield 70 and the convex portion 801 of the box-type windshield case 80 are fitted on the upper surface of the housing 50, and FIG. The perspective view of the box-type windshield case 80 positioned by the annular side windshield 70 on the upper surface is shown.
Here, the concave portion is provided on the annular side windshield 70 side, and the convex portion is provided on the box-type windshield case 80 side. The recess may be provided on the side of the box-type windshield case 80.
次に、筐体の上面に角型側面風防体を取り付ける本発明の実施形態に係る秤量装置の構成について説明する。
図４は、矩形の秤量皿の側面風防体として用いられる角型側面風防体を構成する二つの部材（角型側面風防形成部材）７５を示している。二つの角型側面風防形成部材７５は同一形状であり、それらが組合わされて角型側面風防体が形成される。
角型側面風防形成部材７５は、角型側面風防体の半分を構成する半角型側面風防体７５１と、二つの角型側面風防形成部材７５が組み合わされたときに、相手方の半角型側面風防体７５１の端部に挿入される半角型側面風防体７５１の延長部７５６と、半角型側面風防体７５により三方が囲まれた平板部７５２とを有している。
Next, the configuration of the weighing device according to the embodiment of the present invention in which the square side windshield is attached to the upper surface of the housing will be described.
FIG. 4 shows two members (square side windshield forming members) 75 constituting a square side windshield used as a side windshield of a rectangular weighing pan. The two square side windshield forming members 75 have the same shape and are combined to form a square side windshield.
The square side windshield forming member 75 is the other half square side windshield when the half square side windshield 751 constituting half of the square side windshield and the two square side windshield forming members 75 are combined. An extended portion 756 of the half-angled side windshield 751 inserted into the end of 751 and a flat plate portion 752 surrounded on three sides by the half-angled side windshield 75.
平板部７５２の半角型側面風防体７５１で囲まれていない縁部には、筐体５０の円孔５０１を逃げる半円形の切込み７５３や、位置決め部材６０の固定面６１０を逃げる切込み７５４が設けられている。これらの切込みにより、平板部７５２の一部が位置決め部材６０の並行面６２０と筐体５０との隙間に入り込むことが可能になり、隙間に入り込んだ平板部７５２が係合片として機能する。この係合片となる平板部７５２の位置には、並行面６２０の穴６２１に係合する突部７５５が形成されている。 A semicircular cut 753 for escaping the circular hole 501 of the housing 50 and a cut 754 for escaping the fixing surface 610 of the positioning member 60 are provided on the edge of the flat plate portion 752 that is not surrounded by the half-angle side windshield 751. ing. These cuts allow part of the flat plate portion 752 to enter the gap between the parallel surface 620 of the positioning member 60 and the housing 50, and the flat plate portion 752 that has entered the gap functions as an engagement piece. A protrusion 755 that engages with the hole 621 of the parallel surface 620 is formed at the position of the flat plate portion 752 serving as the engagement piece.
二つの角型側面風防形成部材７５は、図５に示すように、筐体５０の左右から接近させることで、筐体５０上に位置決めされる。図６（ａ）は、二つの角型側面風防形成部材７５が結合する直前の状態を示し、図６（ｂ）は、それらが結合した状態を示している。図７は、その斜視図を示している。
二つの角型側面風防形成部材７５が結合することにより半角型側面風防体７５１が繋がって角型側面風防体が形成される。また、二つの角型側面風防形成部材７５の平板部７５２に形成された突部７５５は、位置決め部材６０１、６０２、６０３、６０４の並行面６２０の穴６２１に嵌合し、二つの角型側面風防形成部材７５は、筐体５０上に位置決めされる。
As shown in FIG. 5, the two square side windshield forming members 75 are positioned on the housing 50 by approaching the housing 50 from the left and right. FIG. 6A shows a state immediately before the two square side windshield forming members 75 are joined, and FIG. 6B shows a state where they are joined. FIG. 7 shows a perspective view thereof.
When the two square side windshield forming members 75 are joined, the half square side windshield 751 is connected to form a square side windshield. Further, the protrusions 755 formed on the flat plate portion 752 of the two square side windshield forming members 75 are fitted into the holes 621 of the parallel surfaces 620 of the positioning members 601, 602, 603, 604, and two square side surfaces are formed. The windshield forming member 75 is positioned on the housing 50.
この二つの角型側面風防形成部材７５は、図８に示すように、皿受け部材９０４が筐体５０内の計量機構と機械的に結合していても、皿受け部材９０４と筐体５０との間に左右から差し込むことで、筐体５０上に位置決めすることができ、また、逆の操作で、皿受け部材９０４を計量機構に結合させたまま、筐体５０の上面から取り外すことができる。
図９は、筐体５０の上面に二つの角型側面風防形成部材７５を位置決めし、皿受け部材９０４の上に秤量皿９０５を載せた秤量装置の断面を示している。この秤量装置では、秤量皿９０５の下側に入り込む気流が角型側面風防体で阻止されるため、高精度の計量が可能である。
As shown in FIG. 8, the two square side windshield forming members 75 are configured so that the plate receiving member 904 and the housing 50 can be connected to each other even if the plate receiving member 904 is mechanically coupled to the measuring mechanism in the housing 50. Can be positioned on the housing 50 by inserting it from the left and right sides, and can be removed from the upper surface of the housing 50 while the dish receiving member 904 is coupled to the weighing mechanism by the reverse operation. .
FIG. 9 shows a cross section of a weighing apparatus in which two square side windshield forming members 75 are positioned on the upper surface of the casing 50 and a weighing pan 905 is placed on the tray receiving member 904. In this weighing apparatus, since the airflow entering the lower side of the weighing pan 905 is blocked by the square side windshield, high-precision weighing is possible.
なお、筐体５０が樹脂製の場合、帯電した筐体５０の静電気の影響を秤量皿９０５が受けて計量精度の低下を招くが、これは、秤量皿９０５の下側の筐体部分を接地電位の金属板で覆うことにより解消できる。この金属板を側面風防体が備えていれば、それが角型側面風防体であろうが環状側面風防体であろうが、静電気の影響の除去に貢献できる。
特に、本発明の角型側面風防体は、図６、図７に示すように、秤量皿９０５の下側に位置する筐体５０の殆どを平板部７５２が覆う構成であるため、この角型側面風防体を、位置決め部材６０１、６０２、６０３、６０４を介して接地すれば、樹脂製筐体における静電気の影響を防ぐことができる。
When the housing 50 is made of resin, the weighing pan 905 is affected by the static electricity of the charged housing 50 and causes a reduction in weighing accuracy. This is because the lower housing portion of the weighing pan 905 is grounded. This can be solved by covering with a potential metal plate. If the side windshield is provided with this metal plate, it can contribute to the removal of the influence of static electricity, whether it is a square side windshield or an annular side windshield.
In particular, the rectangular side windshield of the present invention has a configuration in which the flat plate portion 752 covers most of the housing 50 positioned below the weighing pan 905 as shown in FIGS. If the side windshield is grounded via the positioning members 601, 602, 603, and 604, the influence of static electricity on the resin casing can be prevented.
このように、この秤量装置では、皿受け部材を筐体内の計量機構に結合したまま、角型側面風防体を取り付けたり、取り外したりできるため、筐体上面の掃除が簡単である。
また、角型側面風防体を筐体上に位置決めする位置決め部材は、環状側面風防体の位置決めに使用されるものであり、角型側面風防体及び環状側面風防体の位置決めに共通して利用できる。そのため、個々の専用部品を保管・管理する場合に比べて、コストの低減を図ることができる。また、筐体が樹脂製の場合に、静電気の影響を防止できる。
Thus, in this weighing device, the square side windshield can be attached or removed while the dish receiving member is coupled to the weighing mechanism in the housing, so that the upper surface of the housing can be easily cleaned.
Further, the positioning member for positioning the square side windshield on the casing is used for positioning the annular side windshield, and can be commonly used for positioning the square side windshield and the annular side windshield. . Therefore, the cost can be reduced as compared with the case where individual dedicated parts are stored and managed. In addition, when the casing is made of resin, the influence of static electricity can be prevented.
なお、ここで示した構成は、本発明の一例であり、本発明は、それに限定されるものではない。
ここでは、位置決め部材の並行面６２０に形成した穴６２１と、角形側面風防形成部材７５の平板部７５２に形成した突部７５５とを係合させているが、それを逆にして、位置決め部材の並行面６２０に突部を設け、角形側面風防形成部材７５の平板部７５２に穴を設けても良い。
The configuration shown here is an example of the present invention, and the present invention is not limited thereto.
Here, the hole 621 formed in the parallel surface 620 of the positioning member and the protrusion 755 formed in the flat plate portion 752 of the square side windshield forming member 75 are engaged. A protrusion may be provided on the parallel surface 620 and a hole may be provided in the flat plate portion 752 of the square side windshield forming member 75.
本発明の秤量装置は、各種試料が秤量皿からこぼれた場合でも、簡単に、且つ、計量精度の低下を招くことなく、掃除することが可能であり、精密測定を行う各分野で広く利用することができる。 The weighing device of the present invention can be easily cleaned even when various types of samples are spilled from the weighing pan without causing a drop in weighing accuracy, and is widely used in various fields in which precise measurement is performed. be able to.
５０ 筐体
７０ 環状側面風防体
７５ 角型側面風防形成部材
８０ 箱型風防ケース
５０１ 円孔
５０２ 突起
６０１ 位置決め部材
６０２ 位置決め部材
６０３ 位置決め部材
６０４ 位置決め部材
６１０ 固定面
６１１ 固定用凹部
６２０ 並行面
６２１ 係合用穴
７０１ 係合片
７０２ 係合片
７０３ 係合片
７０４ 係合片
７１０ 円環部
７１１ 突部
７１２ 箱型防風ケース係合用凹部
７５１ 半角型側面風防体
７５２ 平板部
７５３ 切込み
７５４ 切込み
７５５ 突部
７５６ 延長部
８０１ 凸部
９０１ 荷重支承部材
９０２ ダイアフラム抑え板
９０３ 円環状部材
９０４ 皿受け部材
DESCRIPTION OF SYMBOLS 50 Housing | casing 70 Annular side windshield 75 Square side windshield forming member 80 Box type windshield case 501 Circular hole 502 Projection 601 Positioning member 602 Positioning member 603 Positioning member 604 Positioning member 610 Fixed surface 611 Fixing recess 620 Parallel surface 621 For engagement Hole 701 Engagement piece 702 Engagement piece 703 Engagement piece 704 Engagement piece 710 Annular portion 711 Projection 712 Box-type windproof case engagement recess 751 Half-sided side windshield 752 Flat plate portion 753 Cut 754 Cut 755 Projection 756 Extension Portion 801 Protruding portion 901 Load bearing member 902 Diaphragm holding plate 903 Toroidal member 904 Countersunk member
Claims (4)
前記側面風防体は、前記秤量皿の外周を囲む四角形状の角型側面風防体から成り、
前記角型側面風防体は、二つに分割可能な角型側面風防形成部材が組合わされて構成され、
前記位置決め部材は、円環状部分と該円環状部分の内周側に延びる複数の係合片とを備える環状側面風防体を、前記計量機構に前記皿受け部材を結合させた状態で装着するときに使用される部材であり、
前記角型側面風防体は、前記計量機構に前記皿受け部材を結合させた状態で、前記二つの角型側面風防形成部材を、前記筐体の上面に沿って左右から接近させて前記位置決め部材に装着される、
ことを特徴とする秤量装置。 A housing covering the weighing mechanism, a weighing pan on which an object to be weighed by the weighing mechanism is placed, and mechanically coupled to the weighing mechanism to support the weighing pan on the upper surface of the housing A weighing apparatus comprising: a tray receiving member; a side windshield surrounding the weighing pan; and a plurality of positioning members provided on an upper surface of the housing for positioning the side windshield;
The side windshield comprises a rectangular square side windshield surrounding the outer circumference of the weighing pan,
The square side windshield is configured by combining square side windshield forming members that can be divided into two parts,
The positioning member is mounted with an annular side windshield including an annular portion and a plurality of engagement pieces extending toward the inner periphery of the annular portion in a state where the dish receiving member is coupled to the measuring mechanism. It is a member used for
In the state in which the square side windshield body is coupled to the weighing mechanism, the two square side windshield forming members are brought close to each other along the upper surface of the casing from the left and right sides, and the positioning member Attached to the
A weighing apparatus characterized by that.
前記位置決め部材は、
前記筐体の上面に固定される固定面と、
前記固定面に片持ち支持されて、前記筐体の上面と空隙を空けて対向する並行面と、
前記並行面に形成された係合用の穴または突部と、
を有し、
前記複数の位置決め部材は、前記筐体の上面における、前記皿受け部材の中心位置を中心とする同一円上に所定の間隔を空けて、且つ、前記固定面と前記並行面との円周方向の向きを揃えて配置されている、
ことを特徴とする秤量装置。 A weighing device according to claim 1,
The positioning member is
A fixed surface fixed to the upper surface of the housing;
A parallel surface that is cantilevered on the fixed surface and faces the upper surface of the housing with a gap therebetween,
An engagement hole or protrusion formed on the parallel surface;
Have
The plurality of positioning members are spaced apart from each other on the same circle around the center position of the dish receiving member on the upper surface of the casing, and the circumferential direction between the fixed surface and the parallel surface Arranged in the same direction,
A weighing apparatus characterized by that.
前記二つの角型側面風防形成部材は、同一形状であり、
前記角型側面風防形成部材の各々は、
前記角型側面風防体の半分を構成する半角型側面風防体と、
該半角型側面風防体により三方が囲まれた平板部と、
該平板部の前記半角型側面風防体で囲まれていない縁部に形成された切込みと、
該切込みにより前記平板部に形成された、前記位置決め部材の前記並行面と前記筐体の上面との空隙に挿入される係合片と、
該係合片に形成された、前記並行面の前記係合用の穴または突部に係合する突部または穴と、
を備えることを特徴とする秤量装置。 A weighing device according to claim 2, wherein
The two square side windshield forming members have the same shape,
Each of the square side windshield forming members,
A half square side windshield constituting half of the square side windshield;
A flat plate part surrounded on three sides by the half-angle side windshield,
A notch formed in an edge portion of the flat plate portion not surrounded by the half-angle side windshield,
An engagement piece inserted into a gap between the parallel surface of the positioning member and the upper surface of the housing, formed in the flat plate portion by the cutting;
A protrusion or hole that is formed in the engagement piece and engages with the hole or protrusion for engagement on the parallel surface;
A weighing apparatus comprising:
前記環状側面風防体は、外周に複数の凹部または凸部を有し、
前記筐体の上面に載置される箱型の防風ケースは、下面の内周に前記凹部または凸部に嵌合する複数の凸部または凹部を有し、前記環状側面風防体が位置決めされた前記筐体の上面上で、前記凹部と前記凸部とが嵌合されて、前記防風ケースが位置決めされる、
ことを特徴とする秤量装置。 A weighing device according to claim 1,
The annular side windshield has a plurality of recesses or protrusions on the outer periphery,
The box-type windproof case placed on the upper surface of the housing has a plurality of convex portions or concave portions fitted into the concave portions or convex portions on the inner periphery of the lower surface, and the annular side windshield body is positioned. On the upper surface of the housing, the concave portion and the convex portion are fitted, and the windproof case is positioned.
A weighing apparatus characterized by that.
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| JPS57153223A (en) * | 1981-02-21 | 1982-09-21 | Sartorius Werke Gmbh | Electronic weighing apparatus |
| JPH02128530U (en) * | 1988-06-21 | 1990-10-23 | ||
| JP2011007608A (en) * | 2009-06-25 | 2011-01-13 | A & D Co Ltd | Structure for windbreak, moisture prevention, drip prevention, and dust prevention of electronic weighing instrument |
| JP2011153852A (en) * | 2010-01-26 | 2011-08-11 | A & D Co Ltd | Weighing apparatus including windshield structure |
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