[go: up one dir, main page]

JP7015500B2 - Load transducer - Google Patents

Load transducer Download PDF

Info

Publication number
JP7015500B2
JP7015500B2 JP2017221769A JP2017221769A JP7015500B2 JP 7015500 B2 JP7015500 B2 JP 7015500B2 JP 2017221769 A JP2017221769 A JP 2017221769A JP 2017221769 A JP2017221769 A JP 2017221769A JP 7015500 B2 JP7015500 B2 JP 7015500B2
Authority
JP
Japan
Prior art keywords
load
connecting portion
load receiving
receiving portion
axial direction
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.)
Active
Application number
JP2017221769A
Other languages
Japanese (ja)
Other versions
JP2019095201A (en
Inventor
璋好 小林
Original Assignee
ユニパルス株式会社
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 ユニパルス株式会社 filed Critical ユニパルス株式会社
Priority to JP2017221769A priority Critical patent/JP7015500B2/en
Publication of JP2019095201A publication Critical patent/JP2019095201A/en
Application granted granted Critical
Publication of JP7015500B2 publication Critical patent/JP7015500B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Measurement Of Force In General (AREA)

Description

本発明は、荷重を電気信号に変換する荷重変換器に関するものである。 The present invention relates to a load transducer that converts a load into an electrical signal.

従来の荷重変換器(ロードセル)において、荷重の出力を得る方法として、圧縮引張、曲げ、剪断のいずれかによる歪みを歪みゲージで検出する方法が用いられている。その中で剪断歪みを用いる方法は、出力の直線性に優れ、小型化にも有利であって広く用いられている。その際、剪断歪みを検出するために、例えば中央に荷重を直接受ける荷重受け部を設け、その外周に所定の間隔を有して設けた固定部との間に比較的容易には変形しない連結部を設けて、その連結部の側面に剪断歪みを検出するように歪みゲージを貼るという構成が一般的であった。 In a conventional load transducer (load cell), a method of detecting strain due to compression tension, bending, or shearing with a strain gauge is used as a method of obtaining a load output. Among them, the method using shear strain is widely used because it has excellent output linearity and is advantageous for miniaturization. At that time, in order to detect shear strain, for example, a load receiving portion that directly receives a load is provided in the center, and a connection that is not deformed relatively easily with a fixed portion provided at a predetermined interval on the outer periphery thereof. In general, a portion is provided and a strain gauge is attached to the side surface of the connecting portion so as to detect shear strain.

特開昭60-249025号公報Japanese Unexamined Patent Publication No. 60-249025 特開昭60-20133号公報Japanese Unexamined Patent Publication No. 60-20133 特開2002-365147号公報Japanese Unexamined Patent Publication No. 2002-365147

しかしながら特許文献1の図2及び図3のように連結部の側面に歪みゲージを設けているため、作業性に課題があった。特に小型の荷重変換器において連結部の側面の所定の位置に歪みゲージを貼るのは周りに固定部があるために非常に困難であった。また特許文献2のように外周の固定部をザグって歪みゲージを貼る面を設けた構造では荷重変換器の高さ方向が大きくなることから、薄い扁平型の荷重変換器の実現は難しい。さらに特許文献3のように荷重印加方向から歪みゲージを貼れるように工夫されたものがあるものの、連結部の形成のために外周固定部の側面からの加工を行っているので、連結部の形状も非常に複雑になって、加工性やコスト面で充分なものとは言えず改善の余地があった。 However, since the strain gauge is provided on the side surface of the connecting portion as shown in FIGS. 2 and 3 of Patent Document 1, there is a problem in workability. Especially in a small load transducer, it is very difficult to attach a strain gauge to a predetermined position on the side surface of the connecting portion because there is a fixed portion around it. Further, it is difficult to realize a thin flat load transducer because the height direction of the load transducer becomes large in the structure in which the fixed portion on the outer periphery is zigzag and the surface to which the strain gauge is attached is provided as in Patent Document 2. Further, although there is a device such as Patent Document 3 in which a strain gauge can be attached from the load application direction, the shape of the connecting portion is formed because the processing is performed from the side surface of the outer peripheral fixing portion to form the connecting portion. However, it became very complicated, and it could not be said that it was sufficient in terms of workability and cost, and there was room for improvement.

このような問題に鑑みて、本発明は、加工性及び組立て性に優れ、しかも高精度で低コストの荷重変換器を提供することを目的としている。 In view of such problems, it is an object of the present invention to provide a load transducer having excellent workability and assembling property, high accuracy, and low cost.

請求項1に記載の荷重変換器は、上記の目的を達成するために、測定対象の荷重に対し
て軸方向に剛性大なる柱状の荷重受け部と、
荷重受け部の側面と所定間隔にて荷重受け部を囲うように配置され軸方向に剛性大なる固定部と、
荷重受け部と固定部とを、荷重受け部から固定部へ向かう放射方向にて連結して、荷重受け部が受ける荷重に応じて弾性変形する連結部と、
連結部に設けられて連結部に加わる荷重を検出する荷重検出部と、
を備えた荷重変換器であって、
連結部は、
軸方向には厚肉で、放射方向には等角度間隔でそれぞれ設けられる複数の第1の連結部と、
軸方向には第1の連結部よりも薄肉で、放射方向には隣り合う第1の連結部の中間位置に等角度間隔でそれぞれ設けられる複数の第2の連結部とを有し、
荷重検出部は、各第2の連結部の放射方向における伸縮歪みを検出するように設けられて構成されている。
The load converter according to claim 1 has a columnar load receiving portion having a large axial rigidity with respect to the load to be measured, in order to achieve the above object.
A fixed part that is arranged so as to surround the side surface of the load receiving part and the load receiving part at a predetermined interval and has high rigidity in the axial direction.
A connecting portion that connects the load receiving portion and the fixing portion in the radial direction from the load receiving portion to the fixed portion and elastically deforms according to the load received by the load receiving portion.
A load detection unit provided in the connection unit to detect the load applied to the connection unit,
It is a load transducer equipped with
The connecting part is
A plurality of first connecting portions that are thick in the axial direction and are provided at equal intervals in the radial direction.
It is thinner than the first connecting portion in the axial direction, and has a plurality of second connecting portions provided at equal intervals at intermediate positions of the adjacent first connecting portions in the radial direction.
The load detection unit is configured to detect expansion and contraction strain in the radial direction of each second connecting unit.

請求項2に記載の荷重変換器は、上記の目的を達成するために、第2の連結部は、荷重受け部及び固定部から徐々に軸方向の肉厚が減少して第2の連結部の放射方向の略中央部で最薄肉部を有して構成されている。 In the load transducer according to claim 2, in order to achieve the above object, the second connecting portion has a second connecting portion in which the wall thickness in the axial direction is gradually reduced from the load receiving portion and the fixed portion. It is configured to have the thinnest part in the substantially central part in the radial direction of.

請求項3に記載の荷重変換器は、上記の目的を達成するために、荷重受け部と固定部と連結部は同一部材から形成され、連結部は軸方向のみからの穿設によって形成されている。 In the load transducer according to claim 3, in order to achieve the above object, the load receiving portion, the fixing portion, and the connecting portion are formed of the same member, and the connecting portion is formed by drilling only from the axial direction. There is.

請求項4に記載の荷重変換器は、上記の目的を達成するために、連結部は、荷重受け部と固定部との所定間隔以下の直径の円による穿設によって形成されている。 In the load transducer according to claim 4, in order to achieve the above object, the connecting portion is formed by drilling a circle having a diameter equal to or less than a predetermined distance between the load receiving portion and the fixing portion.

請求項1に記載の発明の荷重変換器によれば、荷重検出部が第2の連結部の放射方向の伸縮歪みを検出することで荷重を測定するように設けられているので、荷重検出部の形成が容易であって、組立て性に優れた荷重変換器を提供できる。 According to the load converter of the invention according to claim 1, since the load detecting unit is provided so as to measure the load by detecting the expansion / contraction strain in the radial direction of the second connecting unit, the load detecting unit is provided. It is possible to provide a load converter that is easy to form and has excellent assembleability.

請求項2に記載の発明の荷重変換器によれば上記効果に加えて、第2の連結部の放射方向の伸縮歪みを高精度に検出することが可能となる。 According to the load transducer of the invention according to claim 2, in addition to the above effect, it is possible to detect the expansion / contraction strain in the radial direction of the second connecting portion with high accuracy.

請求項3に記載の発明の荷重変換器によれば上記効果に加えて、荷重受け部と固定部と連結部は同一部材から形成されているので、連結部を均等に変形させることが可能であり、高精度な荷重変換器を提供できる。 According to the load transducer of the invention according to claim 3, in addition to the above effect, since the load receiving portion, the fixing portion and the connecting portion are formed of the same member, the connecting portion can be uniformly deformed. Yes, it is possible to provide a highly accurate load transducer.

請求項4に記載の発明の荷重変換器によれば上記効果に加えて、連結部は軸方向から所定の直径以下の円の穿設のみによって形成することができる。このことから連結部の形成のために固定部の外側壁面からの加工を必要としないので、大幅な加工時間の短縮ができコスト低減が可能となる。 According to the load transducer of the invention according to claim 4, in addition to the above effect, the connecting portion can be formed only by drilling a circle having a predetermined diameter or less from the axial direction. For this reason, since processing from the outer wall surface of the fixed portion is not required for forming the connecting portion, the processing time can be significantly shortened and the cost can be reduced.

本発明の第1の実施形態に係る荷重変換器の上面側からの斜視外観図である。It is a perspective view from the upper surface side of the load transducer which concerns on 1st Embodiment of this invention. 本発明の第1の実施形態に係る荷重変換器の平面図である。It is a top view of the load transducer which concerns on 1st Embodiment of this invention. 本発明の第1の実施形態に係る荷重変換器の底面図である。It is a bottom view of the load transducer which concerns on 1st Embodiment of this invention. 本発明の第1の実施形態に係る荷重変換器のAA断面斜視図である。It is a cross-sectional perspective view of AA of the load transducer which concerns on 1st Embodiment of this invention. 本発明の第1の実施形態に係る荷重変換器のBB断面斜視図である。It is a BB cross-sectional perspective view of the load transducer which concerns on 1st Embodiment of this invention. 本発明の第1の実施形態に係る荷重変換器のCC断面斜視図である。FIG. 3 is a CC sectional perspective view of the load transducer according to the first embodiment of the present invention. 本発明の第1の実施形態に係る荷重変換器内の荷重検出部で構成するホイートストンブリッジ回路図である。It is a Wheatstone bridge circuit diagram which comprises the load detection part in the load converter which concerns on 1st Embodiment of this invention. 本発明の第2の実施形態に係る荷重変換器の上面側からの斜視外観図である。It is a perspective view from the upper surface side of the load transducer which concerns on 2nd Embodiment of this invention. 本発明の第2の実施形態に係る荷重変換器の平面図である。It is a top view of the load transducer which concerns on 2nd Embodiment of this invention. 本発明の第2の実施形態に係る荷重変換器の底面図である。It is a bottom view of the load transducer which concerns on 2nd Embodiment of this invention. 本発明の第2の実施形態に係る荷重変換器のDD断面斜視図である。It is a DD sectional view perspective view of the load transducer which concerns on 2nd Embodiment of this invention. 本発明の第2の実施形態に係る荷重変換器のEE断面斜視図である。It is EE cross-sectional perspective view of the load transducer which concerns on 2nd Embodiment of this invention. 本発明の第2の実施形態に係る荷重変換器のFF断面斜視図である。It is FF cross-sectional perspective view of the load transducer which concerns on 2nd Embodiment of this invention.

以下、本発明の第1の実施形態に係る荷重変換器1aについて、図面を基に詳細な説明を行う。図1は本発明の第1の実施形態に係る荷重変換器1aを上方斜めから見おろした斜視外観図である。 Hereinafter, the load transducer 1a according to the first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective external view of the load transducer 1a according to the first embodiment of the present invention as viewed from above.

荷重変換器1aは、主要なものとして、Z方向から印加される測定対象の荷重に当接して荷重を受ける略円柱形状の荷重受け部2と、荷重受け部2の円柱側面を囲むように外周に配置される略円筒形状の固定部3と、荷重受け部2と固定部3とを繋ぐ連結部と、連結部に貼着されて連結部の弾性変形による歪みを検出する荷重検出部で構成されている。なお本実施形態ではZ方向を図1に示すように、荷重方向すなわち荷重受け部端面2aに垂直な方向と定義する。 The load converter 1a is mainly composed of a substantially cylindrical load receiving portion 2 that abuts on the load of the measurement target applied from the Z direction and receives the load, and an outer circumference that surrounds the cylindrical side surface of the load receiving portion 2. Consists of a substantially cylindrical fixing portion 3 arranged in, a connecting portion connecting the load receiving portion 2 and the fixing portion 3, and a load detecting portion attached to the connecting portion to detect strain due to elastic deformation of the connecting portion. Has been done. In this embodiment, the Z direction is defined as the load direction, that is, the direction perpendicular to the load receiving portion end surface 2a, as shown in FIG.

荷重受け部2は、測定する対象の荷重印加物が直接的又は間接的に当接する端部の荷重受け部端面2a、2bと、Z方向には円柱面形状の荷重受け部円柱面2cと、を有する柱状の形状である。そして荷重受け部2には例えば荷重が正負いずれかのZ方向に加わり、荷重受け部2はこの荷重方向を軸とする柱状であってこの軸方向に剛性大である。 The load receiving portion 2 includes load receiving portion end surfaces 2a and 2b at the end where the load-applied object to be measured directly or indirectly abuts, and a cylindrical surface-shaped load receiving portion cylindrical surface 2c in the Z direction. It is a columnar shape having. Then, for example, a load is applied to the load receiving portion 2 in either the positive or negative Z direction, and the load receiving portion 2 has a columnar shape about the load direction and has high rigidity in the axial direction.

固定部3は、荷重受け部2の荷重受け部円柱面2cと同軸で、荷重受け部2の側面の荷重受け部円柱面2cを囲うように略円筒形状でかつ剛性大にて配置されている。固定部3は、不図示の構造物等に固定できるように設けた固定部円筒端面3a、3bと、Z方向には円筒内面形状の固定部円筒内面3cと、を有する。 The fixed portion 3 is coaxial with the load receiving portion cylindrical surface 2c of the load receiving portion 2, and is arranged in a substantially cylindrical shape and with high rigidity so as to surround the load receiving portion cylindrical surface 2c on the side surface of the load receiving portion 2. .. The fixing portion 3 has a fixing portion cylindrical end surface 3a and 3b provided so as to be fixed to a structure (not shown) or the like, and a fixing portion cylindrical inner surface 3c having a cylindrical inner surface shape in the Z direction.

連結部は、第1の連結部4と第2の連結部5で構成されて、荷重受け部2の荷重受け部円柱面2cと、固定部3の固定部円筒内面3cとを連結している。 The connecting portion is composed of a first connecting portion 4 and a second connecting portion 5, and connects the load receiving portion cylindrical surface 2c of the load receiving portion 2 and the fixed portion cylindrical inner surface 3c of the fixing portion 3. ..

第1の連結部4は複数の第1の連結部4a~4hで構成され、荷重受け部2の軸方向すなわちZ方向においては厚肉である。そして第1の連結部4の固定部円筒端面3a側の端面が第1の平面部6aである。一方図1には現れないが、第1の連結部4の固定部円筒端面3b側の端面が第1の平面部6bである。 The first connecting portion 4 is composed of a plurality of first connecting portions 4a to 4h, and is thick in the axial direction, that is, in the Z direction of the load receiving portion 2. The end surface of the first connecting portion 4 on the side of the fixed portion cylindrical end surface 3a is the first flat surface portion 6a. On the other hand, although it does not appear in FIG. 1, the end surface of the first connecting portion 4 on the side of the fixed portion cylindrical end surface 3b is the first flat surface portion 6b.

また第2の連結部5は複数の第2の連結部5a~5dを含んで構成され、荷重受け部2の軸方向すなわちZ方向においては第1の連結部4よりも薄肉で構成されている。第2の連結部5a~5dのZ方向における厚みは、荷重受け部円柱面2cから荷重受け部2の中心から放射方向である半径方向外側に向かって徐々に減少し、略中央部で最小となって、この中央部付近から外側に向かって徐々に増加して固定部円筒内面3cに連結する形状となっている。また第2の連結部5a~5dは、固定部円筒端面3a側には第2の平面部7aを有し、Z方向の肉厚の増減はこの第2の平面部7aと反対側である固定部円筒端面3b側の面によるものである。 Further, the second connecting portion 5 is configured to include a plurality of second connecting portions 5a to 5d, and is configured to be thinner than the first connecting portion 4 in the axial direction, that is, the Z direction of the load receiving portion 2. .. The thickness of the second connecting portions 5a to 5d in the Z direction gradually decreases from the cylindrical surface 2c of the load receiving portion toward the radial outer side in the radial direction from the center of the load receiving portion 2, and becomes the minimum at the substantially central portion. Therefore, the shape gradually increases from the vicinity of the central portion toward the outside and is connected to the inner surface 3c of the fixed portion cylinder. Further, the second connecting portions 5a to 5d have a second flat surface portion 7a on the side of the fixed portion cylindrical end surface 3a, and the increase / decrease in the wall thickness in the Z direction is on the opposite side of the second flat surface portion 7a. This is due to the surface on the end surface 3b side of the partial cylinder.

そして連結部は、荷重受け部端面2aから負のZ方向にて、第2の連結部5a~5d、第1の連結部4a~4h、第2の連結部5e~5hの順で配置されている。なお第2の連結部5e~5hは図1には現れないので詳細は後述する。 The connecting portions are arranged in the order of the second connecting portions 5a to 5d, the first connecting portions 4a to 4h, and the second connecting portions 5e to 5h in the negative Z direction from the load receiving portion end surface 2a. There is. Since the second connecting portions 5e to 5h do not appear in FIG. 1, the details will be described later.

図2は本発明の第1の実施形態に係る荷重変換器1aの平面図である。第2の連結部5bと第2の連結部5dは、X方向に設けられ、第2の連結部5aと第2の連結部5cは、Y方向に設けられている。すなわち荷重受け部2を中心として、第2の連結部5a~5dは同一形状で放射状に配置されている。本実施形態では荷重受け部2は円筒形であるから、第2の連結部5a~5dは荷重受け部2の円周方向に90度の等角度間隔でそれぞれ配置されている。 FIG. 2 is a plan view of the load transducer 1a according to the first embodiment of the present invention. The second connecting portion 5b and the second connecting portion 5d are provided in the X direction, and the second connecting portion 5a and the second connecting portion 5c are provided in the Y direction. That is, the second connecting portions 5a to 5d are arranged radially with the same shape centering on the load receiving portion 2. In the present embodiment, since the load receiving portion 2 has a cylindrical shape, the second connecting portions 5a to 5d are arranged at equal intervals of 90 degrees in the circumferential direction of the load receiving portion 2, respectively.

第2の連結部5a~5dそれぞれは、荷重受け部2の半径方向においてその幅が、荷重受け部円柱面2cから固定部円筒内面3cに向かって徐々に減少し、固定部3と荷重受け部2との略中央部付近で最小となって、この中央部付近から固定部円筒内面3cに向かって徐々に増加して固定部円筒内面3cに連結する形状となっている。 The width of each of the second connecting portions 5a to 5d gradually decreases from the cylindrical surface 2c of the load receiving portion toward the inner surface 3c of the fixed portion cylinder in the radial direction of the load receiving portion 2, and the fixed portion 3 and the load receiving portion 3 are respectively. It becomes the minimum in the vicinity of the substantially central portion of No. 2, and gradually increases from the vicinity of the central portion toward the inner surface 3c of the fixed portion cylinder and is connected to the inner surface 3c of the fixed portion cylinder.

そして第2の連結部5a~5dの第2の平面部7aには、荷重検出部G1t~G4t、荷重検出部G1c~G4cがそれぞれ貼着されている。より詳細には、例えば荷重検出部G1tと荷重検出部G1cは第2の連結部5aの第2の平面部7a上に、第2の連結部5aのZ方向における最薄肉部9を挟むようにして、荷重受け部2の半径方向に歪みの最大感度を有し、第2の連結部5aの歪みに対して最大感度となる付近に貼着されている。そして荷重受け部端面2a側から荷重受け部端面2b側へ向かってすなわち負のZ方向に荷重変換器1aが荷重を受けた場合には、荷重検出部G1tは引張応力、荷重検出部G1cは圧縮応力を検出する。したがって荷重検出部G1t、G1cは第2の連結部5aの放射方向の伸縮歪みを検出することになる。 The load detection units G1t to G4t and the load detection units G1c to G4c are attached to the second flat surface portions 7a of the second connecting portions 5a to 5d, respectively. More specifically, for example, the load detection unit G1t and the load detection unit G1c sandwich the thinnest portion 9 of the second connecting portion 5a in the Z direction on the second flat surface portion 7a of the second connecting portion 5a. It has the maximum sensitivity of strain in the radial direction of the load receiving portion 2, and is attached in the vicinity of the maximum sensitivity to the strain of the second connecting portion 5a. When the load converter 1a receives a load from the end face 2a side of the load receiving portion toward the end face 2b side of the load receiving portion, that is, in the negative Z direction, the load detection unit G1t is subjected to tensile stress and the load detection unit G1c is compressed. Detect stress. Therefore, the load detection units G1t and G1c detect the expansion and contraction strain of the second connecting portion 5a in the radial direction.

第2の連結部5aと同様に、第2の連結部5bの第2の平面部7a上には、荷重検出部G2tと荷重検出部G2cが第2の連結部5bの最薄肉部9を挟むようにして、荷重受け部2の半径方向に歪みの最大感度を有し、第2の連結部5bの歪みに対して最大感度となる付近に貼着されている。第2の連結部5c、第2の連結部5dにおいても同様である。 Similar to the second connecting portion 5a, the load detecting portion G2t and the load detecting portion G2c sandwich the thinnest portion 9 of the second connecting portion 5b on the second flat surface portion 7a of the second connecting portion 5b. Therefore, it has the maximum sensitivity of strain in the radial direction of the load receiving portion 2, and is attached in the vicinity of the maximum sensitivity to the strain of the second connecting portion 5b. The same applies to the second connecting portion 5c and the second connecting portion 5d.

一方第2の連結部5e~5hが、荷重受け部2の円周方向に90度の等間隔でそれぞれ配置されている。第2の連結部5e~5hは、第2の連結部5a~5dに対して、荷重受け部2の円周方向にそれぞれ45度の角度差で配置されている。第2の連結部5e~5hは、Z方向においては第2の連結部5a~5dと反対向きに設けられていることから、図2において傾斜部8と最薄肉部9が現れる。 On the other hand, the second connecting portions 5e to 5h are arranged at equal intervals of 90 degrees in the circumferential direction of the load receiving portion 2, respectively. The second connecting portions 5e to 5h are arranged with an angle difference of 45 degrees in the circumferential direction of the load receiving portion 2 with respect to the second connecting portions 5a to 5d. Since the second connecting portions 5e to 5h are provided in the opposite direction to the second connecting portions 5a to 5d in the Z direction, the inclined portion 8 and the thinnest portion 9 appear in FIG.

第1の連結部4a~4hは8箇所あって、同一の形状であって荷重受け部2を中心として放射状に配置されている。本実施形態では荷重受け部2は円筒形であるから、第1の連結部4a~4hは荷重受け部2の円周方向に45度の等角度間隔で配置されている。そして第1の連結部4a~4hの円周方向位置は、第2の連結部5a~5hのそれぞれの円周方向の中間位置である。よって、第2の連結部5aを起点として、円周方向反時計回りに、第1の連結部4a、第2の連結部5e、第1の連結部4b、第2の連結部5b、第1の連結部4c、第2の連結部5f、第1の連結部4d、第2の連結部5c、第1の連結部4e、第2の連結部5g、第1の連結部4f、第2の連結部5d、第1の連結部4g、第2の連結部5h、第1の連結部4hの順で各連結部が配置されている。 There are eight first connecting portions 4a to 4h, which have the same shape and are arranged radially around the load receiving portion 2. In the present embodiment, since the load receiving portion 2 has a cylindrical shape, the first connecting portions 4a to 4h are arranged at equal angle intervals of 45 degrees in the circumferential direction of the load receiving portion 2. The circumferential position of the first connecting portions 4a to 4h is an intermediate position in the circumferential direction of the second connecting portions 5a to 5h. Therefore, starting from the second connecting portion 5a, in a counterclockwise direction in the circumferential direction, the first connecting portion 4a, the second connecting portion 5e, the first connecting portion 4b, the second connecting portion 5b, and the first 4c, 2nd connecting part 5f, 1st connecting part 4d, 2nd connecting part 5c, 1st connecting part 4e, 2nd connecting part 5g, 1st connecting part 4f, 2nd Each connecting portion is arranged in the order of the connecting portion 5d, the first connecting portion 4g, the second connecting portion 5h, and the first connecting portion 4h.

図3は本発明の第1の実施形態に係る荷重変換器1aの底面図であって図2の荷重変換器1aを紙面裏側から見たものである。 FIG. 3 is a bottom view of the load transducer 1a according to the first embodiment of the present invention, and is a view of the load transducer 1a of FIG. 2 from the back side of the paper.

荷重受け部2を中心として、第2の連結部5e~5hは同一形状で、かつ荷重受け部2の円周方向に90度の等角度間隔でそれぞれ配置されている。そして第2の連結部5e~5hは、円周方向で第2の連結部5a~5dとは45度の角度差にてそれぞれ配置されている。 The second connecting portions 5e to 5h have the same shape with the load receiving portion 2 as the center, and are arranged at equal intervals of 90 degrees in the circumferential direction of the load receiving portion 2. The second connecting portions 5e to 5h are arranged with an angle difference of 45 degrees from the second connecting portions 5a to 5d in the circumferential direction.

そして第2の連結部5e~5hそれぞれの荷重受け部端面2b側に、同一平面で設けられた第2の平面部7bには、荷重検出部G5t~G8t、荷重検出部G5c~G8cが貼着されている。より詳細には、例えば荷重検出部G5tと荷重検出部G5cは第2の連結部5eの第2の平面部7b上に、第2の連結部5eの最薄肉部9を挟むようにして、荷重受け部2の半径方向に歪の最大感度を有し、第2の連結部5eの歪みに対して最大感度となる付近に貼着されている。そして荷重受け部端面2a側から荷重受け部端面2b側へ向かってすなわち負のZ方向に荷重変換器1aが荷重を受けた場合には、第2の連結部5eにおいて、荷重検出部G5tは引張応力、荷重検出部G5cは圧縮応力を検出する。 The load detection units G5t to G8t and the load detection units G5c to G8c are attached to the second flat surface portion 7b provided on the same plane on the end surface 2b side of the load receiving portion of each of the second connecting portions 5e to 5h. Has been done. More specifically, for example, the load detection unit G5t and the load detection unit G5c sandwich the thinnest portion 9 of the second connecting portion 5e on the second flat surface portion 7b of the second connecting portion 5e so that the load receiving portion 9 is sandwiched between them. It has the maximum sensitivity of strain in the radial direction of 2, and is attached in the vicinity of the maximum sensitivity to the strain of the second connecting portion 5e. When the load converter 1a receives a load from the end face 2a side of the load receiving portion toward the end face 2b side of the load receiving portion, that is, in the negative Z direction, the load detecting portion G5t is pulled in the second connecting portion 5e. The stress and load detection unit G5c detects compressive stress.

第2の連結部5eと同様に、第2の連結部5fの第2の平面部7b上には、荷重検出部G6tと荷重検出部G6cが第2の連結部5fの最薄肉部9を挟むようにして、荷重受け部2の半径方向に歪の最大感度を有し、第2の連結部5fの歪みに対して最大感度となる付近に貼着されている。第2の連結部5g、第2の連結部5dにおいても同様である。 Similar to the second connecting portion 5e, the load detecting portion G6t and the load detecting portion G6c sandwich the thinnest portion 9 of the second connecting portion 5f on the second flat surface portion 7b of the second connecting portion 5f. Therefore, it has the maximum sensitivity of strain in the radial direction of the load receiving portion 2, and is attached in the vicinity of the maximum sensitivity to the strain of the second connecting portion 5f. The same applies to the second connecting portion 5g and the second connecting portion 5d.

荷重検出部G1c~G8c、荷重検出部G1t~G8tは本実施形態では歪みゲージであるが、弾性変形する第2の連結部5の変形量から荷重検出の機能を有するものであればこれに限定されるものではない。 The load detection units G1c to G8c and the load detection units G1t to G8t are strain gauges in this embodiment, but are limited to those having a load detection function from the amount of deformation of the second connecting portion 5 that is elastically deformed. It is not something that will be done.

図4は、図2において断面AAで切断したものをZ方向上側から見おろした断面斜視図である。 FIG. 4 is a cross-sectional perspective view of what was cut in the cross section AA in FIG. 2 and viewed from above in the Z direction.

断面を切断した箇所には第2の連結部5bと第2の連結部5dが該当する。第2の連結部5bは荷重受け部円柱面2cから半径外側方向に向かって、第2の平面部7aと平行に一定の肉厚を有した部分と、肉厚が減少する傾斜部8と、最薄肉部9と、次いで肉厚が増加する傾斜部8と、第2の平面部7aと平行に一定の肉厚を有した部分を有して固定部円筒内面3cに連結されている。そして第2の連結部5bの傾斜部8と対向する第2の平面部7aに、荷重検出部G2cと荷重検出部G2tが貼着されている。第2の連結部5dの傾斜部8に対向する第2の平面部7aにも同様に、荷重検出部G4cと荷重検出部G4tとが貼着されている。 The second connecting portion 5b and the second connecting portion 5d correspond to the portion where the cross section is cut. The second connecting portion 5b has a portion having a constant wall thickness parallel to the second flat surface portion 7a from the load receiving portion cylindrical surface 2c toward the outer radius, and an inclined portion 8 in which the wall thickness decreases. It has a thinnest wall portion 9, an inclined portion 8 whose wall thickness increases next, and a portion having a constant wall thickness parallel to the second flat surface portion 7a, and is connected to the inner surface 3c of the fixed portion cylinder. The load detection unit G2c and the load detection unit G2t are attached to the second flat surface portion 7a facing the inclined portion 8 of the second connecting portion 5b. Similarly, the load detection unit G4c and the load detection unit G4t are attached to the second flat surface portion 7a facing the inclined portion 8 of the second connecting portion 5d.

図5は、図2において断面BBで切断したものをZ方向上側から見おろした断面斜視図である。 FIG. 5 is a cross-sectional perspective view of what was cut in the cross section BB in FIG. 2 and viewed from above in the Z direction.

断面を切断した箇所には第2の連結部5eと第2の連結部5gが該当する。第2の連結部5eは荷重受け部円柱面2cから半径外側方向に向かって、第2の平面部7bと平行に一定の肉厚を有した部分と、肉厚が減少する傾斜部8と、最薄肉部9と、次いで肉厚が増加する傾斜部8と、第2の平面部7bと平行に一定の肉厚を有した部分を有して固定部円筒内面3cに連結されている。そしてこの傾斜部8と対向する第2の平面部7bに荷重検出部G5tと荷重検出部G5cが貼着されている。第2の連結部5gの傾斜部8に対向する第2の平面部7bにも同様に、荷重検出部G7cと荷重検出部G7tとが貼着されている。 The second connecting portion 5e and the second connecting portion 5g correspond to the portion where the cross section is cut. The second connecting portion 5e has a portion having a constant wall thickness parallel to the second flat surface portion 7b from the load receiving portion cylindrical surface 2c toward the outer radius, and an inclined portion 8 in which the wall thickness decreases. It has a thinnest wall portion 9, an inclined portion 8 whose wall thickness increases next, and a portion having a constant wall thickness parallel to the second flat surface portion 7b, and is connected to the inner surface 3c of the fixed portion cylinder. The load detection unit G5t and the load detection unit G5c are attached to the second flat surface portion 7b facing the inclined portion 8. Similarly, the load detection unit G7c and the load detection unit G7t are attached to the second flat surface portion 7b facing the inclined portion 8 of the second connecting portion 5g.

図5により荷重受け部端面2aから負のZ方向に、第2の連結部5a~5d、第1の連結部4a~4h、第2の連結部5e~5hの順にそれぞれ連結部が配置されていることがわかる。 According to FIG. 5, the connecting portions are arranged in the order of the second connecting portions 5a to 5d, the first connecting portions 4a to 4h, and the second connecting portions 5e to 5h in the negative Z direction from the end surface 2a of the load receiving portion. You can see that there is.

図6は、図3において断面CCで切断したものをZ方向上側から見おろした断面斜視図である。 FIG. 6 is a cross-sectional perspective view of what was cut at the cross-sectional CC in FIG. 3 and viewed from above in the Z direction.

断面を切断した箇所には第1の連結部4bと第1の連結部4fが該当する。第1の連結部4は第2の連結部5と比較してZ方向の肉厚が大きく設けられている。そして第1の連結部4は、固定部円筒端面3a側には第1の平面部6aが、固定部円筒端面3b側には第1の平面部6bが、それぞれ設けられている。 The first connecting portion 4b and the first connecting portion 4f correspond to the portion where the cross section is cut. The first connecting portion 4 is provided with a larger wall thickness in the Z direction than the second connecting portion 5. The first connecting portion 4 is provided with a first flat surface portion 6a on the fixed portion cylindrical end surface 3a side and a first flat surface portion 6b on the fixed portion cylindrical end surface 3b side.

図7は本発明の第1の実施形態に係る荷重変換器1a内の荷重検出部を含んで構成するホイートストンブリッジ回路図である。荷重検出部G1t~G4t、荷重検出部G5t~G8tは引張り側の検出であって、それぞれ直列に一辺で組まれて配置される。それぞれ直列に一辺で組まれた荷重検出部G1t~G4tと、荷重検出部G5t~G8tは、ホイートストンブリッジ回路では4辺のうち向かい合う辺として配置される。一方で荷重検出部G1c~G4c、荷重検出部G5c~G8cは圧縮側の検出であって、これもそれぞれ直列に一辺で組まれて配置される。それぞれ直列に一辺で組まれた荷重検出部G1c~G4cと、荷重検出部G5c~G8cも、ホイートストンブリッジ回路では4辺のうち向かい合う辺として配置される。そして電源Eを端子T1-T3間に印加すると、端子T2-T4間に出力S+、S-が電気信号である電圧に変換されて出力される。この構成は、各辺が4つの荷重検出部で構成されていることからホイートストンブリッジ回路の一辺の抵抗値が大きく、電源Eの電圧を大きくすることができて、出力S+、S-を大きくすることができる。 FIG. 7 is a Wheatstone bridge circuit diagram including a load detection unit in the load transducer 1a according to the first embodiment of the present invention. The load detection units G1t to G4t and the load detection units G5t to G8t are detections on the pulling side, and are arranged in series on one side. The load detection units G1t to G4t and the load detection units G5t to G8t, which are assembled in series on one side, are arranged as opposite sides of the four sides in the Wheatstone bridge circuit. On the other hand, the load detection units G1c to G4c and the load detection units G5c to G8c are detections on the compression side, and they are also arranged in series on one side. The load detection units G1c to G4c and the load detection units G5c to G8c, which are assembled in series on one side, are also arranged as opposite sides of the four sides in the Wheatstone bridge circuit. When the power supply E is applied between the terminals T1-T3, the outputs S + and S- are converted into voltages which are electric signals and output between the terminals T2-T4. In this configuration, since each side is composed of four load detection units, the resistance value on one side of the Wheatstone bridge circuit is large, the voltage of the power supply E can be increased, and the outputs S + and S- are increased. be able to.

図8は本発明の第2の実施形態に係る荷重変換器1bを上方斜めから見た斜視外観図である。 FIG. 8 is a perspective external view of the load transducer 1b according to the second embodiment of the present invention as viewed from above.

荷重変換器1bは、主要なものとして、印加される荷重物に当接して荷重を受ける略円柱形状の荷重受け部2と、荷重受け部2の円柱側面に配置される略円筒形状の固定部3と、荷重受け部2と固定部3とを繋ぐ連結部と、連結部に貼着されて連結部の弾性変形による歪みを検出する荷重検出部で構成されている。 The load converter 1b is mainly composed of a substantially cylindrical load receiving portion 2 that abuts on an applied load object and receives a load, and a substantially cylindrical fixing portion that is arranged on the cylindrical side surface of the load receiving portion 2. 3. It is composed of a connecting portion that connects the load receiving portion 2 and the fixing portion 3, and a load detecting portion that is attached to the connecting portion and detects distortion due to elastic deformation of the connecting portion.

主な構成は第1の実施形態にかかわる荷重変換器1aと同じであるため、相違点のみ記述する。 Since the main configuration is the same as that of the load transducer 1a according to the first embodiment, only the differences will be described.

荷重変換器1bは、荷重受け部2と固定部3とを繋ぐ連結部を構成する第1の連結部4と第2の連結部5とが独立した形状ではなく、連続的に繋がった形状である。例えば、第1の連結部4aと第2の連結部5aと第1の連結部4hとは連続的に配置され、第1の連結部4aの第1の平面部6aと、第2の連結部5aの第2の平面部7aと、第1の連結部4hの第1の平面部6aとは同一平面にて設けられている。 The load transducer 1b has a shape in which the first connecting portion 4 and the second connecting portion 5 constituting the connecting portion connecting the load receiving portion 2 and the fixing portion 3 are not independently connected but continuously connected. be. For example, the first connecting portion 4a, the second connecting portion 5a, and the first connecting portion 4h are continuously arranged, and the first flat surface portion 6a of the first connecting portion 4a and the second connecting portion are arranged. The second flat surface portion 7a of 5a and the first flat surface portion 6a of the first connecting portion 4h are provided on the same plane.

図9は本発明の第2の実施形態に係る荷重変換器1bの平面図である。また図10は本発明の第2の実施形態に係る荷重変換器1bの底面図である。 FIG. 9 is a plan view of the load transducer 1b according to the second embodiment of the present invention. Further, FIG. 10 is a bottom view of the load transducer 1b according to the second embodiment of the present invention.

第2の連結部5a~5dの傾斜部8及び最薄肉部9は正のZ方向からの穿設によって形成される。一方第2の連結部5a~5dの傾斜部8及び最薄肉部9は負のZ方向から、第2の連結部5a~5dに対して、荷重受け部2の円周方向に45度の角度差の穿設によって形成される。そしてこの正負のZ双方向からの穿設した孔の間で残存させた部分が第1の連結部4a~4hである。 The inclined portion 8 and the thinnest portion 9 of the second connecting portions 5a to 5d are formed by drilling from the positive Z direction. On the other hand, the inclined portions 8 and the thinnest portions 9 of the second connecting portions 5a to 5d have an angle of 45 degrees in the circumferential direction of the load receiving portion 2 with respect to the second connecting portions 5a to 5d from the negative Z direction. Formed by piercing the difference. The portions left between the holes drilled from both the positive and negative Z directions are the first connecting portions 4a to 4h.

図11は、図9において断面DDで切断したものをZ方向上側から見おろした断面斜視図である。 FIG. 11 is a cross-sectional perspective view of what was cut in the cross section DD in FIG. 9 and viewed from above in the Z direction.

図11において、断面を切断した箇所には第2の連結部5bと第2の連結部5dが該当する。第2の連結部5bは荷重受け部円柱面2cから半径外側方向に向かって、肉厚が減少する傾斜部8と、最薄肉部9と、次いで肉厚が増加する傾斜部8とを有して固定部円筒内面3cに連結されている。そして第2の連結部5bの傾斜部8及び最薄肉部9に対向する第2の平面部7aに、荷重検出部G2cと荷重検出部G2tが貼着されている。第2の連結部5dの傾斜部8に対向する第2の平面部7aにも同様に、荷重検出部G4cと荷重検出部G4tとが貼着されている。 In FIG. 11, the second connecting portion 5b and the second connecting portion 5d correspond to the portion where the cross section is cut. The second connecting portion 5b has an inclined portion 8 whose wall thickness decreases from the load receiving portion cylindrical surface 2c toward the outer radius, a thinnest wall portion 9, and an inclined portion 8 whose wall thickness increases next. Is connected to the inner surface 3c of the fixed portion cylinder. The load detection unit G2c and the load detection unit G2t are attached to the second flat surface portion 7a facing the inclined portion 8 and the thinnest wall portion 9 of the second connecting portion 5b. Similarly, the load detection unit G4c and the load detection unit G4t are attached to the second flat surface portion 7a facing the inclined portion 8 of the second connecting portion 5d.

図12は、図9において断面EEで切断したものをZ方向上側から見おろした断面斜視図である。 FIG. 12 is a cross-sectional perspective view of what was cut by the cross-sectional EE in FIG. 9 and looked down from above in the Z direction.

図12において、断面を切断した箇所には第2の連結部5eと第2の連結部5gが該当する。第2の連結部5eは荷重受け部円柱面2cから半径外側方向に向かって、肉厚が減少する傾斜部8と、最薄肉部9と、次いで肉厚が増加する傾斜部8とを有して固定部円筒内面3cに連結されている。そして第2の連結部5eの傾斜部8及び最薄肉部9に対向する第2の平面部7bに、荷重検出部G5cと荷重検出部G5tが貼着されている。第2の連結部5gの傾斜部8に対向する第2の平面部7bにも同様に、荷重検出部G7cと荷重検出部G7tとが貼着されている。 In FIG. 12, the second connecting portion 5e and the second connecting portion 5g correspond to the portion where the cross section is cut. The second connecting portion 5e has an inclined portion 8 whose wall thickness decreases from the load receiving portion cylindrical surface 2c toward the outer radius, a thinnest wall portion 9, and an inclined portion 8 whose wall thickness increases next. Is connected to the inner surface 3c of the fixed portion cylinder. The load detection unit G5c and the load detection unit G5t are attached to the second flat surface portion 7b facing the inclined portion 8 and the thinnest wall portion 9 of the second connecting portion 5e. Similarly, the load detection unit G7c and the load detection unit G7t are attached to the second flat surface portion 7b facing the inclined portion 8 of the second connecting portion 5g.

図13は、図9において断面FFで切断したものをZ方向上から見おろした断面斜視図である。 FIG. 13 is a cross-sectional perspective view of what was cut in the cross-sectional FF in FIG. 9 and looked down from above in the Z direction.

断面を切断した箇所には第1の連結部4bと第1の連結部4fが該当する。第1の連結部4は第2の連結部5と比較してZ方向の肉厚が大きく設けられている。そして第1の連結部4のZ方向の端面が第1の平面部6aと第1の平面部6bであって、これは第2の平面部7aと第2の平面部7bとそれぞれ同一面である。 The first connecting portion 4b and the first connecting portion 4f correspond to the portion where the cross section is cut. The first connecting portion 4 is provided with a larger wall thickness in the Z direction than the second connecting portion 5. The end faces of the first connecting portion 4 in the Z direction are the first flat surface portion 6a and the first flat surface portion 6b, which are on the same plane as the second flat surface portion 7a and the second flat surface portion 7b, respectively. be.

ゆえに第1の実施形態及び第2の実施形態のいずれにおいても、放射方向に伸びて設けられた連結部は、放射方向に略垂直な方向からの荷重受け部2と固定部3の所定間隔以下の寸法Hの直径の円の刃物等による穿設のみによって形成することができる。このことから連結部の形成において固定部3の外側円筒壁面からの加工を必要としないので、大幅な加工時間の短縮ができコスト低減が可能となる。 Therefore, in both the first embodiment and the second embodiment, the connecting portion provided extending in the radial direction is equal to or less than a predetermined distance between the load receiving portion 2 and the fixing portion 3 from a direction substantially perpendicular to the radial direction. It can be formed only by drilling with a circular blade or the like having a diameter of dimension H. For this reason, since it is not necessary to process the fixed portion 3 from the outer cylindrical wall surface in forming the connecting portion, the processing time can be significantly shortened and the cost can be reduced.

また第1の実施形態及び第2の実施形態のいずれにおいても、荷重受け部、固定部及び連結部は同一部材から切り出して製作することができるので、荷重を受けた際に連結部を均等に変形させることが可能なため高精度な荷重変換器を実現でき、例えば荷重検出部を別体にした別体型のように組み立てて調整する必要がないという利点がある。 Further, in both the first embodiment and the second embodiment, the load receiving portion, the fixing portion and the connecting portion can be manufactured by cutting out from the same member, so that the connecting portion is evenly formed when a load is received. Since it can be deformed, a highly accurate load transducer can be realized, and there is an advantage that it is not necessary to assemble and adjust it as in the case of a separate type in which the load detection unit is separated.

以上、本発明を好ましい実施形態に基づいて説明したが、本発明は上述した実施形態に限定されるものではなく、その要旨を逸脱しない範囲で種々の変更が可能である。 Although the present invention has been described above based on the preferred embodiment, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof.

本発明の活用例として、ロードセルなど荷重を測定する装置への適用が可能である。 As an example of utilization of the present invention, it can be applied to a device for measuring a load such as a load cell.

1a、1b :荷重変換器
2 :荷重受け部
2a、2b :荷重受け部端面
2c :荷重受け部円柱面
3 :固定部
3a、3b :固定部円筒端面
3c :固定部円筒内面
4、4a、4b、4c、4d、4e、4f、4g、4h :第1の連結部
5、5a、5b、5c、5d、5e、5f、5g、5h :第2の連結部
6a、6b :第1の平面部
7a、7b :第2の平面部
8 :傾斜部
9 :最薄肉部
G1c~G8c :荷重検出部
G1t~G8t :荷重検出部
1a, 1b: Load converter 2: Load receiving part 2a, 2b: Load receiving part end surface 2c: Load receiving part Cylindrical surface 3: Fixed part 3a, 3b: Fixed part Cylindrical end surface 3c: Fixed part Cylindrical inner surface 4, 4a, 4b 4, 4c, 4d, 4e, 4f, 4g, 4h: First connecting portion 5, 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h: Second connecting portion 6a, 6b: First flat surface portion 7a, 7b: Second flat surface portion 8: Inclined portion 9: Thinnest wall portion G1c to G8c: Load detection unit G1t to G8t: Load detection unit

Claims (4)

測定対象の荷重に対して軸方向に剛性大なる柱状の荷重受け部と、
前記荷重受け部の側面と所定間隔にて前記荷重受け部を囲うように配置され前記軸方向に剛性大なる固定部と、
前記荷重受け部と前記固定部とを、前記荷重受け部から前記固定部へ向かう放射方向にて連結して、前記荷重受け部が受ける荷重に応じて弾性変形する連結部と、
前記連結部に設けられて前記連結部に加わる荷重を検出する荷重検出部と、
を備えた荷重変換器であって、
前記連結部は、
前記軸方向には厚肉で、前記放射方向には等角度間隔でそれぞれ設けられる複数の第1の連結部と、
前記軸方向には前記第1の連結部よりも薄肉で、前記放射方向には隣り合う前記第1の連結部の中間位置に等角度間隔でそれぞれ設けられる複数の第2の連結部とを有し、前記荷重検出部は、前記各第2の連結部の前記放射方向における伸縮歪みを検出するように設けられていることを特徴とする荷重変換器。
A columnar load receiving part with high rigidity in the axial direction with respect to the load to be measured,
A fixed portion that is arranged so as to surround the load receiving portion at a predetermined interval from the side surface of the load receiving portion and has a large rigidity in the axial direction.
A connecting portion that connects the load receiving portion and the fixing portion in a radial direction from the load receiving portion toward the fixing portion and elastically deforms according to the load received by the load receiving portion.
A load detection unit provided in the connection portion to detect a load applied to the connection portion, and a load detection unit.
It is a load transducer equipped with
The connecting part is
A plurality of first connecting portions that are thick in the axial direction and are provided at equal intervals in the radial direction.
The axial direction is thinner than the first connecting portion, and the radial direction has a plurality of second connecting portions provided at equal intervals at intermediate positions of the adjacent first connecting portions. However, the load detecting unit is a load converter provided so as to detect the expansion / contraction strain of each of the second connecting portions in the radial direction.
前記第2の連結部は、前記荷重受け部及び前記固定部から徐々に前記軸方向の肉厚が減少して前記第2の連結部の前記放射方向の略中央部で最薄肉部を有することを特徴とする請求項1に記載の荷重変換器。 The second connecting portion has a thinnest portion at a substantially central portion in the radial direction of the second connecting portion in which the wall thickness in the axial direction gradually decreases from the load receiving portion and the fixing portion. The load transducer according to claim 1. 前記荷重受け部と前記固定部と前記連結部は同一部材から形成され、前記連結部は前記軸方向のみからの穿設によって形成されることを特徴とする請求項1又は2に記載の荷重変換器。 The load transducer according to claim 1 or 2, wherein the load receiving portion, the fixing portion, and the connecting portion are formed of the same member, and the connecting portion is formed by drilling only from the axial direction. vessel. 前記連結部は、前記荷重受け部と前記固定部との前記所定間隔以下の直径の円による穿設によって形成されることを特徴とする請求項3に記載の荷重変換器。
The load transducer according to claim 3, wherein the connecting portion is formed by drilling a load receiving portion and the fixing portion with a circle having a diameter equal to or less than a predetermined distance.
JP2017221769A 2017-11-17 2017-11-17 Load transducer Active JP7015500B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017221769A JP7015500B2 (en) 2017-11-17 2017-11-17 Load transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2017221769A JP7015500B2 (en) 2017-11-17 2017-11-17 Load transducer

Publications (2)

Publication Number Publication Date
JP2019095201A JP2019095201A (en) 2019-06-20
JP7015500B2 true JP7015500B2 (en) 2022-02-03

Family

ID=66971279

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2017221769A Active JP7015500B2 (en) 2017-11-17 2017-11-17 Load transducer

Country Status (1)

Country Link
JP (1) JP7015500B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247837A (en) 1991-09-25 1993-09-28 Rosemount Inc. Magnetic flowmeter electrode
JP2006300908A (en) 2005-04-15 2006-11-02 Akiyoshi Kobayashi Force transducer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0674942U (en) * 1993-03-29 1994-10-21 大和製衡株式会社 Load cell
JP3159092B2 (en) * 1996-12-20 2001-04-23 ティアック株式会社 Load cell

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247837A (en) 1991-09-25 1993-09-28 Rosemount Inc. Magnetic flowmeter electrode
JP2006300908A (en) 2005-04-15 2006-11-02 Akiyoshi Kobayashi Force transducer

Also Published As

Publication number Publication date
JP2019095201A (en) 2019-06-20

Similar Documents

Publication Publication Date Title
US9395256B2 (en) Low profile multi-axis load cell
JP5883771B2 (en) Pressure sensor
JP5885249B2 (en) Axial force sensor
US9383271B2 (en) Load detection device
US3484732A (en) Dual range pressure sensor
US10677667B2 (en) Component transducer and multi-component transducer using such component transducer as well as use of such multi-component transducer
JP5117804B2 (en) 6-axis force sensor
JP2009264890A (en) Pressure sensor
JP7015500B2 (en) Load transducer
CN109696262A (en) A kind of ultrathin type strain force sensor
CN110319956B (en) Sensor and method for manufacturing sensor
JP7260095B2 (en) load transducer
CN117553945A (en) Force sensor and force sensor
US9488672B2 (en) Dual channel accelerometer and method of manufacturing the same
JP3233210U (en) Load cell
JPH06347284A (en) Strain gauge type converter and initial value variation detecting method thereof
CN216050201U (en) High-precision sheet weighing sensor
JP6696026B1 (en) Load cell
KR102286967B1 (en) Strain gages, diaphragm structures and sensors including the same
JPH0194234A (en) Load converter
JP2527551B2 (en) Thin load cell
JP4762611B2 (en) Load sensor, weight measuring instrument
JP6364637B2 (en) Load transducer
CN117571187B (en) Elastomer strain structure for load sensor
JP6836753B2 (en) Load transducer

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20201112

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20210816

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210817

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20210902

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20220107

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20220114

R150 Certificate of patent or registration of utility model

Ref document number: 7015500

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250