JP6912847B1 - Load sensor and load distribution measuring device for molds - Google Patents

Load sensor and load distribution measuring device for molds Download PDF

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JP6912847B1
JP6912847B1 JP2021023917A JP2021023917A JP6912847B1 JP 6912847 B1 JP6912847 B1 JP 6912847B1 JP 2021023917 A JP2021023917 A JP 2021023917A JP 2021023917 A JP2021023917 A JP 2021023917A JP 6912847 B1 JP6912847 B1 JP 6912847B1
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久野　拓律
拓律 久野
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株式会社アデック
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Abstract

【課題】荷重方向の取り付け寸法の制約を低減することができる荷重センサと、この荷重センサを備える金型用荷重分布測定装置を提供する。【解決手段】荷重センサ１０は、起歪体１と、起歪体１から突出し、被測定物に当接する当接面１１ａを有し、測定軸Ｌ１上に一対に設けられる当接突起１１と、当接突起１１間における測定軸Ｌ１上に設けられ、起歪体１の歪を検出する歪検出素子１２と、起歪体１と接続し、測定軸Ｌ１と交差する仮想線Ｌ２上に一対に設けられる固定部１３と、を有する。【選択図】 図１PROBLEM TO BE SOLVED: To provide a load sensor capable of reducing restrictions on mounting dimensions in a load direction, and a load distribution measuring device for a mold provided with the load sensor. A load sensor (10) has a strain-causing body (1) and a contact surface (11a) protruding from the strain-causing body (1) and abutting against an object to be measured, and a pair of contact projections (11) provided on a measurement shaft (L1). , A pair of strain detecting elements 12 provided on the measurement axis L1 between the abutting protrusions 11 and detecting the strain of the strain generating body 1 and a pair on the virtual line L2 connected to the strain generating body 1 and intersecting the measuring shaft L1. It has a fixing portion 13 provided in the. [Selection diagram] Fig. 1

Description

本発明は、荷重センサ及び金型に掛かる荷重の分布を測定する金型用荷重分布測定装置に関する。 The present invention relates to a load sensor and a mold load distribution measuring device for measuring the distribution of a load applied to a mold.

従来から、特許文献１のような、プレート状の起歪体と、該起歪体にボルト孔を２か所に形成した荷重センサ（ロードセル）が開示されている。ボルト孔は、荷重方向と方向が同一の測定軸上に設けられる。２か所のボルト孔の間の起歪体における測定軸上には、起歪体の歪を測定する歪ゲージが貼着される。このような荷重センサは、ボルト間で起歪体が引っ張り力を受けて起歪体に歪が生じ、この歪を歪ゲージが検出して荷重が測定される。 Conventionally, a plate-shaped strain generating body as in Patent Document 1 and a load sensor (load cell) in which bolt holes are formed in two places in the strain generating body have been disclosed. The bolt holes are provided on the measurement shaft having the same load direction and direction. A strain gauge for measuring the strain of the strain-causing body is attached on the measurement axis of the strain-causing body between the two bolt holes. In such a load sensor, the strain-causing body receives a tensile force between the bolts to cause strain in the strain-causing body, and the strain gauge detects this strain to measure the load.

実開昭５９−１３７５０３号公報Jitsukaisho 59-137503 Gazette

従来の荷重センサは、測定軸上に歪ゲージやボルト孔が並ぶため、測定軸方向（すなわち荷重方向）に長く形成される。すると、荷重方向の長さが短い被測定物である場合には、荷重センサを取り付けることができない場合がある。特に、金型が取り付けられる加工機械に、荷重センサが設けられたプレートを備える金型用荷重分布測定装置を取り付けるような場合には、金型の高さ方向は荷重方向と一致することが多く、また、加工機械に取り付け可能な金型高さに制約があるため、金型用荷重分布測定装置のプレートの厚みを厚くすることができないことがあった。 In the conventional load sensor, strain gauges and bolt holes are lined up on the measurement axis, so that the conventional load sensor is formed long in the measurement axis direction (that is, the load direction). Then, if the object to be measured has a short length in the load direction, the load sensor may not be attached. In particular, when a mold load distribution measuring device equipped with a plate provided with a load sensor is attached to a processing machine to which a mold is attached, the height direction of the mold often coincides with the load direction. Further, since there is a limitation on the height of the mold that can be attached to the processing machine, it may not be possible to increase the thickness of the plate of the load distribution measuring device for the mold.

本発明は、荷重方向の取り付け寸法の制約を低減することができる荷重センサと、この荷重センサを備える金型用荷重分布測定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 load sensor capable of reducing restrictions on mounting dimensions in the load direction, and a load distribution measuring device for a mold provided with the load sensor.

本発明に係る荷重センサは、起歪体と、前記起歪体から突出し、被測定物に当接する当接面を有し、測定軸上に一対に設けられる当接突起と、前記当接突起間における前記測定軸上に設けられ、前記起歪体の歪を検出する歪検出素子と、前記起歪体と接続し、前記測定軸と交差する仮想線上に一対に設けられる固定部と、を有することを特徴とする。 The load sensor according to the present invention has a strain-causing body, a contact surface that protrudes from the strain-causing body and comes into contact with an object to be measured, and a pair of contact protrusions provided on a measurement axis and the contact protrusion. A strain detecting element provided on the measuring axis between the measuring shafts and detecting the strain of the straining body, and a pair of fixed portions connected to the straining body and provided on a virtual line intersecting the measuring shaft. It is characterized by having.

本発明に係る金型用荷重分布測定装置は、上述の荷重センサと、リブ及び前記リブの延在方向に直交する２か所の溝部を備えるプレートと、を有し、前記荷重センサは、前記固定部から前記溝部に亘って挿通されるボルト及び該ボルトと螺合するナットにより前記リブに固定されることを特徴とする。 The load distribution measuring device for a mold according to the present invention includes the above-mentioned load sensor and a plate provided with a rib and two grooves orthogonal to the extending direction of the rib, and the load sensor is the said. It is characterized in that it is fixed to the rib by a bolt inserted from the fixing portion to the groove portion and a nut screwed with the bolt.

本発明によれば、荷重方向の取り付け寸法の制約を低減することができる荷重センサと、この荷重センサを備える金型用荷重分布測定装置を提供することができる。 According to the present invention, it is possible to provide a load sensor capable of reducing restrictions on mounting dimensions in the load direction, and a load distribution measuring device for a mold provided with the load sensor.

本発明の実施形態に係る荷重センサを示す図であり、（ａ）は平面図であり、（ｂ）は（ａ）の下面図である。It is a figure which shows the load sensor which concerns on embodiment of this invention, (a) is a plan view, (b) is a bottom view of (a). 本発明の実施形態に係る荷重センサを示す図であり、（ａ）は図１（ａ）のＩＩａ−ＩＩａ断面図であり、（ｂ）は図１（ａ）のＩＩｂ−ＩＩｂ断面図である。It is a figure which shows the load sensor which concerns on embodiment of this invention, (a) is the sectional view of IIa-IIa of FIG. 1 (a), (b) is the sectional view of IIb-IIb of FIG. 1 (a). .. 本発明の実施形態に係る荷重センサを備える金型用荷重分布測定装置が取り付けられた加工機械であるプレス機械を示す正面模式図である。It is a front schematic diagram which shows the press machine which is the processing machine which attached the load distribution measuring apparatus for a die provided with the load sensor which concerns on embodiment of this invention. 本発明の実施形態に係る荷重センサが金型用荷重分布測定装置のプレートのリブに取り付けられている状態を示す図であり、（ａ）は上面図であり、（ｂ）は（ａ）のＩＶｂ−ＩＶｂ断面図である。It is a figure which shows the state which the load sensor which concerns on embodiment of this invention is attached to the rib of the plate of the load distribution measuring apparatus for a mold, (a) is a top view, (b) is (a). It is a sectional view of IVb-IVb. 本発明の実施形態に係る荷重センサの他の取り付け状態を示す断面図である。It is sectional drawing which shows the other mounting state of the load sensor which concerns on embodiment of this invention. 本発明の実施形態に係る荷重センサの変形例を示す図である。It is a figure which shows the modification of the load sensor which concerns on embodiment of this invention.

図１及び図２に基づいて、本発明の実施形態に係る荷重センサ１０を説明する。荷重センサ１０は、略長矩形板状に形成される起歪体１を有する。図１（ａ）の平面視において、起歪体１の短手方向に延びる中心軸線は、測定軸Ｌ１とされる。起歪体１の長手方向に延びる中心軸線は、仮想線Ｌ２とされる。仮想線Ｌ２は、測定軸Ｌ１と直交する。 The load sensor 10 according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. The load sensor 10 has a strain-causing body 1 formed in a substantially long rectangular plate shape. In the plan view of FIG. 1A, the central axis extending in the lateral direction of the strain generating body 1 is defined as the measurement axis L1. The central axis extending in the longitudinal direction of the strain generating body 1 is referred to as a virtual line L2. The virtual line L2 is orthogonal to the measurement axis L1.

起歪体１の一方面１ａ側における測定軸Ｌ１上には、当接突起１１が一対に設けられる。当接突起１１は、起歪体１の長手方向の縁部に沿って、平面視略長矩形状に突出して形成される。当接突起１１の平面視における中心は、測定軸Ｌ１上に位置される。当接突起１１の対向する各２か所の角部は、角Ｒ状に面取りされている。当接突起１１の先端面は、平坦に形成されて、被測定物と当接する当接面１１ａとされる。 A pair of contact projections 11 are provided on the measurement shaft L1 on the one side 1a side of the strain generating body 1. The abutting protrusion 11 is formed so as to project in a substantially rectangular shape in a plan view along the edge portion in the longitudinal direction of the strain generating body 1. The center of the abutting projection 11 in a plan view is located on the measurement axis L1. The two opposing corners of the abutting protrusion 11 are chamfered in an R-shaped corner. The tip surface of the abutting projection 11 is formed flat so as to be a abutting surface 11a that abuts the object to be measured.

当接突起１１間における測定軸Ｌ１上には、起歪体１の歪を検出する歪検出素子１２が設けられる。歪検出素子１２は、起歪体１の測定軸Ｌ１方向における歪を検出することができる。本実施形態における歪検出素子１２は、半導体歪ゲージである。歪検出素子１２は、半導体歪ゲージの他、歪ゲージや圧電センサ等、歪を検出することができる他の素子を用いることができる。 A strain detecting element 12 for detecting the strain of the strain generating body 1 is provided on the measuring shaft L1 between the abutting protrusions 11. The strain detecting element 12 can detect the strain of the strain generating body 1 in the measurement axis L1 direction. The strain detection element 12 in this embodiment is a semiconductor strain gauge. As the strain detection element 12, in addition to the semiconductor strain gauge, other elements capable of detecting strain, such as a strain gauge and a piezoelectric sensor, can be used.

荷重センサ１０は、当接突起１１の当接面１１ａが被測定物に当接する。当接面１１ａが強く被測定物と当接することで、被測定物と当接面１１ａの間に摩擦力が生じる。従って、被測定物が測定軸Ｌ１方向に圧縮又は伸長すると、被測定物と共に当接面１１ａ間の距離（すなわち当接突起１１間の起歪体１）が圧縮又は伸長され、歪検出素子１２により起歪体１の圧縮又は伸長が検出される。 In the load sensor 10, the contact surface 11a of the contact protrusion 11 comes into contact with the object to be measured. When the contact surface 11a strongly contacts the object to be measured, a frictional force is generated between the object to be measured and the contact surface 11a. Therefore, when the object to be measured is compressed or expanded in the direction of the measurement axis L1, the distance between the contact surfaces 11a (that is, the strain generating body 1 between the contact projections 11) is compressed or expanded together with the object to be measured, and the strain detecting element 12 The compression or expansion of the strain generating body 1 is detected by.

仮想線Ｌ２上には、起歪体１に一体的に接続する一対の固定部１３が設けられる。本実施形態においては、固定部１３には、ボルトが挿通されるボルト孔１３ｈが設けられる。ボルト孔１３ｈの中心（すなわち固定部１３の中心）は仮想線Ｌ２上に位置する。ボルト孔１３ｈ周りには、起歪体１の一方面１ａと連続する基端面１３ａ１から突出するように、平面視において略矩形のボス部１３ａが形成される。起歪体１の他方面１ｂ側のボルト孔１３ｈ周りは、起歪体１の他方面１ｂよりも高いボルト座面１３ｂ１を有するボルト座部１３ｂが形成される。ボルト座部１３ｂは、測定軸Ｌ１方向の長さが起歪体１の短手方向の長さと一致し、仮想線Ｌ２方向の長さがボス部１３ａの仮想線Ｌ２方向の長さと一致する略長矩形状に形成される。なお、荷重センサ１０における仮想線Ｌ２方向の側面は、ボス部１３ａからボルト座部１３ｂに亘って連続する平坦面状に形成される。 A pair of fixing portions 13 integrally connected to the strain generating body 1 are provided on the virtual line L2. In the present embodiment, the fixing portion 13 is provided with a bolt hole 13h through which a bolt is inserted. The center of the bolt hole 13h (that is, the center of the fixing portion 13) is located on the virtual line L2. A substantially rectangular boss portion 13a is formed around the bolt hole 13h so as to protrude from the proximal end surface 13a1 continuous with the one surface 1a of the strain generating body 1. Around the bolt hole 13h on the other side surface 1b side of the strain generating body 1, a bolt seat portion 13b having a bolt seating surface 13b1 higher than the other surface 1b of the strain generating body 1 is formed. The length of the bolt seat portion 13b in the measurement axis L1 direction coincides with the length of the strain generating body 1 in the lateral direction, and the length in the virtual line L2 direction coincides with the length of the boss portion 13a in the virtual line L2 direction. It is formed in a long rectangular shape. The side surface of the load sensor 10 in the direction of the virtual line L2 is formed in a flat surface shape continuous from the boss portion 13a to the bolt seat portion 13b.

ここで、当接突起１１における起歪体１の一方面１ａからの高さｈ１は、ボス部１３ａにおける起歪体１の一方面１ａからの高さｈ２よりも高く形成される（ｈ１＞ｈ２）。具体的には、当接突起１１の高さｈ１は、ボス部１３ａの高さｈ２よりも０．０２〜０・０３ｍｍ程度高く形成される。 Here, the height h1 from one surface 1a of the strain generating body 1 in the contact projection 11 is formed higher than the height h2 from one surface 1a of the strain generating body 1 in the boss portion 13a (h1> h2). ). Specifically, the height h1 of the contact protrusion 11 is formed to be about 0.02 to 0.03 mm higher than the height h2 of the boss portion 13a.

仮想線Ｌ２上における歪検出素子１２の両側には、孔部１４が設けられる。孔部１４は、測定軸Ｌ１方向に長い長孔状に形成される貫通孔である。孔部１４の中心は、仮想線Ｌ２上に位置する。 Holes 14 are provided on both sides of the strain detecting element 12 on the virtual line L2. The hole portion 14 is a through hole formed in a long hole shape long in the measurement axis L1 direction. The center of the hole 14 is located on the virtual line L2.

次に、荷重センサ１０が、金型用荷重分布測定装置１００に取り付けられる態様について説明する。ここで、金型用荷重分布測定装置１００は、例えば図３に示すプレス機械２００に取り付けられる。プレス機械２００は、クラウン２１０、スライド２２０、ベッド２３０、コラム２４０を有する。プレス機械２００は、クラウン２１０の内部に設けられる図示しない駆動装置によりコンロッド２２１を介してスライド２２０が上下に往復移動される。ベッド２３０の上面にはボルスタ２５０が設けられ、ボルスタ２５０の上面には下型３２０が設けられる。 Next, a mode in which the load sensor 10 is attached to the mold load distribution measuring device 100 will be described. Here, the mold load distribution measuring device 100 is attached to, for example, the press machine 200 shown in FIG. The press machine 200 has a crown 210, a slide 220, a bed 230, and a column 240. In the press machine 200, the slide 220 is reciprocated up and down via the connecting rod 221 by a drive device (not shown) provided inside the crown 210. A bolster 250 is provided on the upper surface of the bed 230, and a lower mold 320 is provided on the upper surface of the bolster 250.

スライド２２０の下面には、金型用荷重分布測定装置１００が設けられる。金型用荷重分布測定装置１００の下面には、上型３１０が設けられる。金型用荷重分布測定装置１００は、プレート状に形成される荷重受部材１１０を備える。荷重受部材１１０は、金型３００（上型３１０、下型３２０）によりプレス加工が行われた際に発生する荷重を受ける。荷重受部材１１０は、内部に複数の凹部１１１が形成されることにより、該凹部１１１間にリブ１１２が形成される。リブ１１２は、プレス機械２００の前後方向及び左右方向に延在する。 A mold load distribution measuring device 100 is provided on the lower surface of the slide 220. An upper mold 310 is provided on the lower surface of the mold load distribution measuring device 100. The mold load distribution measuring device 100 includes a load receiving member 110 formed in a plate shape. The load receiving member 110 receives a load generated when press working is performed by the dies 300 (upper die 310, lower die 320). The load receiving member 110 has a plurality of recesses 111 formed therein, so that ribs 112 are formed between the recesses 111. The rib 112 extends in the front-rear direction and the left-right direction of the press machine 200.

荷重受部材１１０は、上型３１０から伝達される荷重がリブ１１２に伝達される。すると、スライド２２０の下面に当接するリブ１１２は、圧縮又は伸長する。従って、このリブ１１２を被測定物とし、プレス加工の際のリブ１１２の歪を測定することにより、金型３００の荷重分布を測定することができる。 In the load receiving member 110, the load transmitted from the upper die 310 is transmitted to the rib 112. Then, the rib 112 that abuts on the lower surface of the slide 220 is compressed or expanded. Therefore, the load distribution of the die 300 can be measured by using the rib 112 as an object to be measured and measuring the strain of the rib 112 during press working.

荷重センサ１０が荷重受部材１１０のリブ１１２に固定される状態を図４に基づいて説明する。リブ１１２には、リブ１１２の延在方向（図４（ａ）の上下方向）に直交する２か所の溝部１１２ａが設けられる。溝部１１２ａは、リブ１１２を貫通するよう形成される。荷重センサ１０は、固定部１３のボルト孔１３ｈ及び溝部１１２ａに亘ってボルト２０が挿通される。ボルト２０には、ナット２１が螺合する。荷重センサ１０は、ボルト２０及び該ボルトに螺合するナット２１によりリブ１１２に固定される。 A state in which the load sensor 10 is fixed to the rib 112 of the load receiving member 110 will be described with reference to FIG. The rib 112 is provided with two groove portions 112a orthogonal to the extending direction of the rib 112 (vertical direction in FIG. 4A). The groove portion 112a is formed so as to penetrate the rib 112. In the load sensor 10, the bolt 20 is inserted through the bolt hole 13h and the groove 112a of the fixing portion 13. A nut 21 is screwed into the bolt 20. The load sensor 10 is fixed to the rib 112 by a bolt 20 and a nut 21 screwed onto the bolt.

ここで、荷重センサ１０をリブ１１２に取り付けると、リブ１１２の側面とボス部１３ａの先端面との間には、隙間Ｓが形成される。従って、ボルト２０とナット２１を締め付けることで、当接突起１１の当接面１１ａが、被測定物であるリブ１１２の側面に強く当接される。このとき、起歪体１は、起歪体１における孔部１４の測定軸Ｌ１方向の個所が撓み、起歪体１における歪検出素子１２周りは変形しないので、ボルト２０の締め付けによる歪検出素子１２の検出精度への影響が低減される。なお、図４（ａ）及び図４（ｂ）は、理解のため、当接突起１１の高さを誇張して高く表している。 Here, when the load sensor 10 is attached to the rib 112, a gap S is formed between the side surface of the rib 112 and the tip surface of the boss portion 13a. Therefore, by tightening the bolt 20 and the nut 21, the contact surface 11a of the contact projection 11 is strongly in contact with the side surface of the rib 112 which is the object to be measured. At this time, in the strain generating body 1, the portion of the hole 14 in the strain generating body 1 in the measurement axis L1 direction is bent, and the strain detecting element 12 in the strain generating body 1 is not deformed. Therefore, the strain detecting element is tightened by tightening the bolt 20. The influence of 12 on the detection accuracy is reduced. In addition, in FIG. 4A and FIG. 4B, the height of the contact projection 11 is exaggerated and shown high for the sake of understanding.

このように、金型用荷重分布測定装置１００は、荷重受部材１１０の厚みを厚くすることなくリブ１１２に荷重センサ１０を取り付けることができるので、プレス機械２００のような加工機械における金型の高さ（プレス機械２００におけるダイハイト）に及ぼす影響を低く抑えた金型用荷重分布測定装置１００を形成することができる。 As described above, the load distribution measuring device 100 for the die can attach the load sensor 10 to the rib 112 without increasing the thickness of the load receiving member 110, so that the load sensor 10 can be attached to the rib 112 of the die in a processing machine such as the press machine 200. It is possible to form the load distribution measuring device 100 for dies in which the influence on the height (die height in the press machine 200) is suppressed to a low level.

なお、図３に示す金型用荷重分布測定装置１００の荷重受部材１１０の形態は一例であり、例えば下型３２０とボルスタ２５０の間に設けることもできるし、金型３００のダイセットプレート（不図示）を荷重受部材とすることもできる。すなわち、図４（ａ）、図４（ｂ）に示すように、荷重センサ１０がリブ１１２に取り付けられていればよい。 The form of the load receiving member 110 of the mold load distribution measuring device 100 shown in FIG. 3 is an example. For example, it can be provided between the lower mold 320 and the bolster 250, or the die set plate of the mold 300 ( A load receiving member (not shown) can also be used as a load receiving member. That is, as shown in FIGS. 4A and 4B, the load sensor 10 may be attached to the rib 112.

荷重センサ１０の他の取り付け例を図５に示す。被測定物５０は、超鋼からなる四角柱状部材である。図５においては、荷重方向（測定軸Ｌ１の方向）は、紙面に垂直な方向である。被測定物５０は、治具３０の断面略コ字状の開口部分に配置される。荷重センサ１０のボルト２０は、治具３０の断面略コ字状のリブ状部分の雌ねじ部に螺合する。当接突起１１は、対向する被測定物５０の側面に当接する。 Another mounting example of the load sensor 10 is shown in FIG. The object to be measured 50 is a square columnar member made of super steel. In FIG. 5, the load direction (direction of the measurement axis L1) is a direction perpendicular to the paper surface. The object to be measured 50 is arranged in an opening portion having a substantially U-shaped cross section of the jig 30. The bolt 20 of the load sensor 10 is screwed into the female threaded portion of the rib-shaped portion having a substantially U-shaped cross section of the jig 30. The abutting projection 11 abuts on the side surface of the object to be measured 50 facing the object.

荷重センサ１０は、測定軸Ｌ１方向に固定部１３（ボルト２０）が設けられていないので、超鋼からなる被測定物５０のように雌ねじ部の形成が困難な被測定物５０であっても、容易に荷重センサ１０を用いて荷重測定を行うことができる。 Since the load sensor 10 is not provided with the fixing portion 13 (bolt 20) in the measurement axis L1 direction, even if the object to be measured 50 is difficult to form a female threaded portion such as the object to be measured 50 made of super steel. , The load can be easily measured using the load sensor 10.

以上、本発明の実施形態を説明したが、本発明は本実施形態によって限定されることは無く、種々の変更を加えて実施することができる。例えば、図６に示すように、図１の長孔とされる孔部１４に換えて、測定軸Ｌ１方向に並ぶ複数個（図６では３個）の丸穴１４Ａとすることもできる。また、当接突起１１の形状は、略長矩形状だけでなく、複数の柱状突起等種々の形状とすることができる。また、仮想線Ｌ２は、任意の角度で測定軸Ｌ１と交差していればよい。換言すれば、当接突起１１及び歪検出素子１２は、固定部１３間に配置されていればよい。なお、本実施形態のように測定軸Ｌ１と仮想線Ｌ２が直交することで、荷重センサ１０をコンパクトに形成することができる。 Although the embodiment of the present invention has been described above, the present invention is not limited to the present embodiment and can be implemented with various modifications. For example, as shown in FIG. 6, instead of the hole portion 14 which is the elongated hole in FIG. 1, a plurality of (three in FIG. 6) round holes 14A arranged in the measurement axis L1 direction may be used. Further, the shape of the abutting protrusion 11 is not limited to a substantially long rectangular shape, but may be various shapes such as a plurality of columnar protrusions. Further, the virtual line L2 may intersect the measurement axis L1 at an arbitrary angle. In other words, the abutting projection 11 and the strain detecting element 12 may be arranged between the fixing portions 13. The load sensor 10 can be compactly formed by making the measurement axis L1 and the virtual line L2 orthogonal to each other as in the present embodiment.

１ 起歪体 １ａ 一方面
１ｂ 他方面 １０ 荷重センサ
１１ 当接突起 １１ａ 当接面
１２ 歪検出素子 １３ 固定部
１３ａ ボス部 １３ａ１ 基端面
１３ｂ ボルト座部 １３ｂ１ ボルト座面
１３ｈ ボルト孔 １４ 孔部
１４Ａ 丸穴 ２０ ボルト
２１ ナット ３０ 治具
５０ 被測定物
１００ 金型用荷重分布測定装置 １１０ 荷重受部材
１１１ 凹部 １１２ リブ
１１２ａ 溝部 ２００ プレス機械
２１０ クラウン ２２０ スライド
２２１ コンロッド ２３０ ベッド
２４０ コラム ２５０ ボルスタ
３００ 金型 ３１０ 上型
３２０ 下型 Ｌ１ 測定軸
Ｌ２ 仮想線 Ｒ 角
Ｓ 隙間 1 Distortion body 1a One side 1b Another side 10 Load sensor 11 Abutment protrusion 11a Abutment surface 12 Strain detection element 13 Fixed part 13a Boss part 13a1 Base end surface 13b Bolt seat part 13b1 Bolt seat surface 13h Bolt hole 14 Hole part 14A Round Hole 20 Bolt 21 Nut 30 Jig 50 Object 100 Measured load distribution measuring device for mold 110 Load receiving member 111 Recess 112 Rib 112a Groove 200 Press machine 210 Crown 220 Slide 221 Conrod 230 Bed 240 Column 250 Bolster 300 Mold 310 Top Type 320 Lower type L1 Measuring axis L2 Virtual line R Angle S Gap

Claims (5)

一の測定軸を備える荷重センサであって、
起歪体と、
前記起歪体から突出し、被測定物に当接する当接面を有し、前記測定軸上に一対に設けられる当接突起と、
前記当接突起間における前記測定軸上に設けられ、前記起歪体の歪を検出する歪検出素子と、
前記起歪体と接続し、前記測定軸と交差する仮想線上に一対に設けられる固定部と、
を有することを特徴とする荷重センサ。
 A load sensor with one measuring axis
Distortion body and
Protrudes from the strain body has a contact surface that contacts the workpiece, the contact projection provided on the pair on the measuring axis,
A strain detecting element provided on the measuring axis between the abutting protrusions and detecting the strain of the strain-causing body, and a strain detecting element.
A pair of fixed portions connected to the strain-causing body and provided on a virtual line intersecting the measurement axis,
A load sensor characterized by having.
 前記仮想線は、前記測定軸と直交することを特徴とする請求項１に記載の荷重センサ。 The load sensor according to claim 1, wherein the virtual line is orthogonal to the measurement axis. 前記固定部は、ボルト孔を含むことを特徴とする請求項１又は請求項２に記載の荷重センサ。 The load sensor according to claim 1 or 2, wherein the fixing portion includes a bolt hole. 前記当接突起の高さは、前記ボルト孔周りに設けられるボス部の高さよりも高く形成され、
前記仮想線上における前記歪検出素子の両側の前記起歪体には、孔部が設けられることを特徴とする請求項３に記載の荷重センサ。 The height of the abutting protrusion is formed higher than the height of the boss portion provided around the bolt hole.
The load sensor according to claim 3, wherein holes are provided in the strain generating bodies on both sides of the strain detecting element on the virtual line. 請求項３又は請求項４に記載の荷重センサと、
リブ及び前記リブの延在方向に直交する２か所の溝部を備えるプレートと、
を有し、
前記荷重センサは、前記固定部から前記溝部に亘って挿通されるボルト及び該ボルトと螺合するナットにより前記リブに固定されることを特徴とする金型用荷重分布測定装置。
The load sensor according to claim 3 or 4.
A plate having a rib and two grooves orthogonal to the extending direction of the rib,
Have,
The load sensor is a load distribution measuring device for a mold, characterized in that the load sensor is fixed to the rib by a bolt inserted from the fixing portion to the groove portion and a nut screwed with the bolt.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01119731A (en) * 1987-11-04 1989-05-11 Canon Inc Multi-axis force sensor
JP2001296177A (en) * 2000-02-13 2001-10-26 Yazaki Corp Sensor unit for measuring vehicle load
WO2008061763A2 (en) * 2006-11-22 2008-05-29 Brosa Ag Torsion-resistant force inducer comprising a plate in the central opening
JP2010122032A (en) * 2008-11-19 2010-06-03 Aisin Seiki Co Ltd Load detection device for vehicle seat
US20130340537A1 (en) * 2012-06-14 2013-12-26 Tecsis Gmbh Force sensor including sensor plate with local differences in stiffness

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01119731A (en) * 1987-11-04 1989-05-11 Canon Inc Multi-axis force sensor
JP2001296177A (en) * 2000-02-13 2001-10-26 Yazaki Corp Sensor unit for measuring vehicle load
WO2008061763A2 (en) * 2006-11-22 2008-05-29 Brosa Ag Torsion-resistant force inducer comprising a plate in the central opening
JP2010122032A (en) * 2008-11-19 2010-06-03 Aisin Seiki Co Ltd Load detection device for vehicle seat
US20130340537A1 (en) * 2012-06-14 2013-12-26 Tecsis Gmbh Force sensor including sensor plate with local differences in stiffness

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