JP2001033300A - Load measuring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a load measuring device which is of a thin type and can have high measurement accuracy by joining a long body to be deformed through a support member to a load point of a load table loaded with a material to be measured, and storing the body to be deformed in a frame and supporting the same from the opposite side to the load table. SOLUTION: This device includes a flat plate-like load table 1 loaded with a material to be measured, a pair of support members 2 serving as load point, a body to be deformed 3, strain gauges 4a, 4b, and a frame 6 provided with a projecting part 5 for supporting both ends of the body to be deformed 3. The support members 32 are positioned on he body to be deformed 3, and an upper flat countersunk head screw 1m extended in the cross direction of the body to be deformed 3 is screwed in a female screw 2h to fasten the support member to the load table 1. The load point is formed by the support members 2 to freely support the strain inducer 3 and the load table 1. Thus, the magnitude of moment applied to the body to be deformed is a substantially fixed value determined by load regardless of the loading surface contact area of a material to be measured, so that stable load output can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an object to be measured, such as a trolley or a gas cylinder on which a load is loaded, is mounted on the load table from an end of the load table, and the object is measured using a strain gauge. The present invention relates to a load measuring device for measuring the weight of a load.

[0002]

2. Description of the Related Art FIG. 15 is a schematic view showing the structure of a conventional load measuring device 20 using a single-point support load cell. The load measuring device 20 has a frame-shaped strain body 21A having four thin portions 21k. Load cell 21 composed of
A strain gauge 21 attached to the upper surface and the lower surface of the thin portion 21k for detecting the bending of the strain body 21A in the longitudinal direction.
s and a mounting portion 2 for fixing one end of the load cell 21
2 and a plate-shaped load table 25 that is connected to the other end of the load cell 21 at the joint 24 and that mounts the object to be measured. It is for measuring the weight of the measured object such as the trolley and the gas cylinder. The load cell 21 has a cantilever structure,
The strain gauge 21s detects the amount of strain of the flexure element 21A that bends and deforms due to the load loaded on the tower 5 by using the strain gauge 21s.
From the amount of strain and the size and Young's modulus of the strain body 21A,
The load on the object to be measured can be determined by calculating the moment acting on the strain generating body 21A from the object to be measured mounted on the load table 25.

[0003]

However, in the above-described conventional load measuring device, the load cell 21 is configured such that the strain body 21A is formed so as to increase the amount of strain while maintaining strength.
Has a problem that the thickness of the load measuring device is increased because the section of the frame has a frame structure. Further, when the object to be measured is mounted on the load table 25, even if the center of gravity of the object to be measured is concentrated on one end of the load table 25 and a large moment acts, the load table 25 and the load cell 21 only withstand it. Since the thickness of the load table 25 and the strain body 21A is increased so as to have the strength described above, there is a problem that the apparatus is further increased in size.

The present invention has been made in view of the conventional problems, and an object of the present invention is to provide a load measuring apparatus which is thin and has high measuring accuracy.

[0005]

According to a first aspect of the present invention, there is provided a load measuring device which includes a load table on which an object to be measured is mounted, a load table on which an object to be measured is mounted, and load points of the load table. An elongate strain body joined to the load table via a support member, strain detection means for detecting a strain in the longitudinal direction of the strain body, a frame for accommodating the strain body, and a frame. A frame having a projection that supports the strain body from the side opposite to the load table, and the support member extends in the width direction of the strain body, and the cross-sectional shape is convex toward the strain body side. The load table and the strain body are in point or line contact with each other.

According to a second aspect of the present invention, in the load measuring device, the protrusion is a columnar body extending in the width direction of the strain body and having a sectional shape convex toward the strain body.

According to a third aspect of the present invention, there is provided a load measuring device provided with means for restricting movement of the strain body in a direction away from the support member or the protrusion.

According to a fourth aspect of the present invention, there is provided a load measuring device, wherein a through hole is provided at a contact portion of the strain body with the support member, and an insertion portion having an outer shape smaller than an inner diameter of the through hole; A supporting member provided at an upper portion and having a head having an outer shape larger than the inner diameter of the through-hole, the supporting member being supported from a surface opposite to the supporting member of the strain body without contacting the surface. It is attached to a member to restrict the movement of the strain body.

According to a fifth aspect of the present invention, there is provided a load measuring device, wherein a through hole is provided at a contact portion of the flexure element with the projection, and an insertion portion having an outer shape smaller than the inner diameter of the through hole; A coupling member provided at an upper portion and having a head having an outer shape larger than the inner diameter of the through hole, from a surface opposite to the protrusion of the strain generating body, in a state of not contacting the surface,
It is attached to the above-mentioned projection to restrict the movement of the strain body.

According to a sixth aspect of the present invention, the external dimensions of the load table are made larger than the internal dimensions of the frame.

According to a seventh aspect of the present invention, at least one of the frame portions is provided with a tapered portion.

[0012] The load measuring device according to claim 8 is 100
A load measuring device capable of measuring a load up to kg, wherein a thickness from the bottom of the frame to the upper surface of the load table is 25 mm or less.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a configuration of a load measuring device 10 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA and a line BB of FIG. The load measuring device 10 includes a flat load table (hereinafter, referred to as a top plate) 1 on which an object to be measured such as a truck or a gas cylinder on which luggage is mounted, and a load point on a lower surface side of the top plate 1. A pair of support members 2, 2 which are freely supported on the top plate 1 respectively, and are arranged in parallel with each other at a predetermined interval; Strain gauges 4 (4a, 4b) which are attached to the upper and lower surfaces of the bodies 3, 3 and serve as strain detecting means for detecting the strain in the longitudinal direction of the strain body.
And a frame 6 provided with projections 5 for supporting both ends of each of the strain elements 3 and 3. Reference numeral 7 denotes a connection board for relaying the lead wire 4s of the strain gauge 4 and a measurement cable 7s from a strain detection circuit (not shown). Reference numeral 8 denotes a cable fitting provided on the frame 6 for holding the measurement cable 7s. is there.

The support member 2 is a semi-circular (semi-cylindrical) columnar member which is located on the flexure element 3 and extends in the width direction of the flexure element 3 and whose cross-sectional shape is convex on the flexure element side. , FIG. 2
As shown in (b), the upper flat screw 1m is screwed into the female screw 2h provided at a position intersecting with the center line of the strain body 3, thereby being fastened to the top plate 1 and having a width. At both ends in the direction, a gap is provided below the flexure element 3 and in the left and right directions. See Figure 2 for details.
(C) As shown in FIG.
And a through-hole 3p is provided at a position corresponding to the female screw 2n of the strain body 3, and a bolt 2m having a diameter smaller than the inner diameter of the through-hole 3p as a connecting member is provided in the through-hole 3p. By screwing into the female screw 2n from the surface (lower surface) 3b of the strain generating element 3 opposite to the support member 2 in a state of not contacting the surface of the strain generating element 3, the strain generating element 3 The support member 2 is connected. As a result, the support member 2 and the flexure element 3 are not fastened, but are connected in a state where a gap is provided in the downward direction and left and right directions, so that the flexure element 3 is separated from the support member 2. Movement in the direction of movement is restricted. Also, the protrusion 5 provided on the frame 6 is also a semicircular columnar body extending in the width direction of the strain body 3 and having a cross-sectional shape convex on the strain body side, as shown in FIG. Similarly to the support member 2, a female screw 5n is provided at a position of the projecting portion 5 intersecting with the center line of the strain-generating body 3, and at a position corresponding to the female screw 5n of the strain-generating body 3. A through hole 3q is provided, and the through hole 3q serving as a connecting member is provided in the through hole 3q.
A bolt 5m having a diameter smaller than the inner diameter of the strain generating element 3 from the upper surface 3a side of the strain generating element 3 while not contacting the surface of the strain generating element 3;
It is screwed into the female screw 2n and connected to the strain body 3. As a result, the protrusion 5 and the strain body are not fastened, but are connected in a state where a gap is provided in the upward direction and left and right directions, so that the strain body 3 is separated from the protrusion 5. Is also restricted.

FIG. 3 is a view showing the structure of the frame 6 (a).
The figure is a plan view, the figure (b) is an AA sectional view of the figure (a),
(C) is a sectional view taken along line BB of (a). The frame 6 is
Four semi-cylindrical projections provided at the center with a female screw 5n for connecting the flexure element 3 and the projection 5 for supporting the two flexure elements 3 and 3 having the above configuration, respectively. 5, a frame body 6A comprising a bottom plate 6a made of, for example, a thin steel plate, provided at symmetrical positions, and a frame portion 6b erected around the bottom plate 6a and accommodating the strain generating bodies 3, 3. A groove 6B provided on one side of the length of the strain body 3, 3 of the frame body 6A and extending in the width direction of the strain body 3, 3;
And a climbing portion 6C having an inclined portion 6k for guiding the object to be measured to the top plate 1. The cable fitting 8 is connected to the frame body 6.
A is mounted on a surface perpendicular to the riding portion 6C.
Further, a bent portion 6d which is bent horizontally inward of the frame portion 6b is provided on an upper portion of each side of the frame portion 6b.
A seal member 6D for preventing water and dust from entering the frame portion 6b is provided on the upper outside of the frame b.

As shown in FIGS. 4 (a) and 4 (b), the strain body 3 is provided at the longitudinal center of the upper surface 3a and the lower surface 3b for measuring the strain amount of the strain body 3 in the longitudinal direction. It is a long flat plate to which uniaxial (bending) type strain gauges 4a, 4b are stuck. The strain gauges 4a, 4b are stuck so that their bonding axes Z coincide with the longitudinal direction of the strain body 3. Is done. Female screws 5 embedded in the protrusions 5 are provided at both ends of the flexure element 3.
n is provided with a through hole 3q for inserting a bolt 5m that is screwed into the n. As described above, the strain body 3 and the protruding portion 5 are moved upward and left by the bolt 5m and the female screw 5n. , Are connected with a gap in the right direction (FIG. 2).
(D)). Further, inside the through hole 3q, a strain member 3 and a support member 2 fastened to the top plate 1 are provided.
Hole 3 for inserting bolt 2m to connect
p is provided, and as described above, the strain generating element 3 and the support member 2 are connected by the bolts 2m and the female screws 2n in a state where gaps are provided in the downward, left, and right directions. (See FIG. 2 (c)).

The top plate 1 is shown in FIGS. 5 (a) and 5 (b).
As shown in the figure, a bent portion 1d having a countersunk hole 1p for inserting a countersunk screw provided at a position corresponding to the female screw 2h of the support member 2 and having an outer peripheral portion bent vertically is provided. As described above, the top plate 1 and the support member 2 are fastened by the bolt 1m and the female screw 2h (see FIG. 2B). The outer dimensions of the top plate 1 are larger than the outer dimensions of the frame body 6A of the frame body 6, and the bent portion 1d is designed such that the riding portion 6C side enters the groove 6B (FIG. 2 ( a)).

Next, the steady operation of the load measuring device 10 having the above configuration will be described. As shown in FIG. 6, when a distributed load acts on the top plate 1, the load becomes 2
Since the load is transmitted from the load points 2z, 2z to the flexure element 3, the object X to be measured is located substantially at the center of the top plate 1.
Is applied, the force P transmitted to the strain body 3 has the same magnitude at the two load points 2z, 2z irrespective of the width w of the distributed load of the measured object X. Here, when the load points 2z, 2z are fixed supports made of a rigid body such as a metal, the moment M acting on the strain element 3
Depends on the width w of the distributed load. That is, when the width w of the distributed load is small, as shown in FIG. 7 (a), a large moment M _1, the width w of the distributed load
When it is large, as shown in FIG. 7 (b), a moment M ₂ decreases. On the other hand, in the load measuring device 10 of the present embodiment, the load points 2z, 2z extend in a direction perpendicular to the bending direction of the flexure element 3 (width direction), and have a semi-cylindrical support convex to the flexure element 3 side. As shown in FIG. 8, since the flexure element 3 and the top plate 1 are configured to contact each other at a point or a line to freely support each other.
(A), the Moment M ₃ when the width w of the distributed load is smaller, shown in FIG. 8 (b), the magnitude of the moment M ₄ when the width w of the distributed load is large is approximately equal.

When the flexure element 3 and the top plate 1 are fixedly supported, even if the object to be measured is placed at the center of the scale (the center of the top plate 1), the width w of the distributed load, that is, When the contact area of the measurement object with the tower mounting surface is different, the magnitude of the moment M acting on the flexure element 3 changes, so that the magnitude of the strain generated in the flexure element 3 changes. Therefore, the value of the load output detected by the strain gauge 4 also changes, and the load on the object to be measured cannot be measured stably. On the other hand, in the present embodiment, the load points 2z, 2z are constituted by the support members 2, 2 described above, and the strain generating element 3 and the top plate 1 are freely supported. The magnitude of the moment M is
Regardless of the contact area of the object to be measured on the tower mounting surface, the value becomes substantially constant determined by the load, and a stable load output can be obtained. That is, if the object to be measured is mounted so that the center of gravity is located at the center of the top plate 1, the tower of the object to be measured can be used even if the simple strain-generating body 3 made of a long plate as described above is used. Regardless of the contact area of the mounting surface, the load of the object to be measured can be measured stably and accurately.

Note that the strain amount ε = Δl / l of the strain body 3 is
The measurement is performed by a known bridge circuit as shown in FIG.
That is, the upper surface 3a and the lower surface 3b of one strain body 3 having one side
Strain gauges 4 with resistance values of R ₁₁ and R ₁₂
a, 4b, and the other side is adhered to the upper surface 3a and the lower surface 3b of the other flexure element 3, respectively, and the resistance value is R ₂₁ , R
_A bridge circuit composed of a series circuit of ₂₂ strain gauges 4c and 4d is formed. The voltage applied to both ends A and B of the bridge circuit is V ₀ , the length of the strain body 3 is 1 and the amount of elongation is Δl. Then, the strain gauges 4a and 4b and the strain gauge 4
The output difference V between the connection points C and D of c and 4d is V = (ΔR /
R) V ₀ = 2εV ₀ Therefore, a moment M acting on the strain element 3 is calculated based on the strain amount ε and the size and Young's modulus of the strain element 3, and the moment M
From this, the load of the object to be measured can be obtained.

As shown in FIG. 10 (a), an object X to be measured such as a trolley or a gas cylinder loaded with luggage is mounted on the top plate 1 from a slope 6k provided on a climbing portion 6C of the frame 6. It rests on the edge and then moves to the center of the top plate 1. When the object to be measured X is placed on the top plate 1, a load acts on the end of the top plate 1, so that the top plate 1 bends. However, the load measuring device 10 according to the present embodiment uses the top plate 1. Of the frame body 6A of the frame body 6A, a bent portion 6d is provided in the frame portion 6b, and a groove 6B is formed in the bending direction of the top plate 1. When bent downward, as shown in FIG. 10B, the end of the top plate 1
d. Therefore, the frame 6
Functions as a stopper against the bending (downward displacement) of the top plate 1, and acts on the top plate 1 and the strain body 3 when the object X is placed on the top plate 1. The magnitude of the force P and the moment M can be limited.

Assuming that the distance between the load point 2 and the load point K is L and the force exerted on the top plate 1 by the object to be measured is P, M = P near the load point of the top plate 1.
・ Because the moment of L is generated, it has strength to withstand it, that is, a thick top plate was required,
By setting the gap t between the top plate 1 and the bent portion 6d of the frame 6b to an appropriate value, the load load point K is at the end of the top plate 1 and a large moment M acts on the top plate 1. But top plate 1
Is in contact with the upper portion of the bent portion 6d, and no further force is applied. Therefore, it is not necessary to increase the thickness of the top plate 1 and the flexure element 3 to increase the strength, and the top plate 1 and the flexure element 3 can be made thinner, and the load measuring device 10 can be made thinner and lighter. it can. For example, when a load measuring device capable of measuring a load of up to 100 kg is constituted by a conventional load cell type, the thickness of the measuring section (height to the top plate upper surface) is about 50 mm or more in order to secure strength. In contrast, the load measuring device 10 of the present embodiment can reduce the thickness to about 25 mm or less. Further, by making the load measuring device 10 thin, the height of the climbing portion 6C having the slope portion 6k can be reduced and the slope of the slope portion 6k can be reduced, so that the object to be measured can be more easily placed on the top plate. Can be mounted on top.

When the flexure element is firmly fastened to the projection with both ends fixed and stable, not only the projection is made firm, but also a bolt for fastening the projection and the flexure element is used. Although it is necessary to increase the size, the screw diameter of the protruding portion and the hole diameter of the strain generating element also increase, which hinders the reduction in thickness and weight of the load measuring device. On the contrary,
In the load measuring device 10 of the present embodiment, the protrusion 5 is formed of a semicircular columnar body extending in the width direction of the strain body 3 and having a sectional shape convex on the strain body side. Since the protrusion 5 is connected to the portion 5 with a gap provided in the upward direction and the left and right directions, the protrusion 5 has a strength enough to withstand a vertical load caused by a point or line contact with the strain body 3. And the connecting bolt 5m is also upward and left,
Since it is sufficient that the strength is sufficient to prevent the device from being disassembled rightward, the size can be reduced, and the overall device can be made thinner and lighter.

Further, as shown in FIG. 11, if the surface Y on which the load measuring device 10 is installed has some irregularities and undulations, and the bottom plate 6a made of a thin steel plate is deformed following the irregularities and undulations, If the strain body 3 and the projection 5 are firmly fastened, the strain body 3 is also deformed due to the above deformation, so that the measurement accuracy may be reduced. In 10, the flexure element 3 is connected to the protrusion 5 in a state where a gap is provided in the upward direction and the left and right directions.
Since the frame 6 is not strongly fastened, even if the frame 6 is slightly deformed, it is possible to prevent unnecessary deformation of the flexure element 3 and perform stable load measurement. As shown in FIGS. 12 (a) and 12 (b), an elastic sheet 6v such as rubber is provided on the bottom of the bottom plate 6a, or an elastic body such as rubber is provided at a position corresponding to the protrusion 5 on the bottom of the bottom plate 6a. By providing the legs 6w, it is possible to absorb the influence of irregularities and undulations on the surface Y on which the load measuring device 10 is installed, and to perform more stable load measurement.

As described above, in the present embodiment, the semi-cylindrical support member 2 protruding toward the flexure element 3 and extending in the direction perpendicular to the bending direction of the flexure element 3 attached to the top plate 1 is provided. As the load point, the load of the object to be measured mounted on the top plate 1 was measured.
Can be set to a constant value irrespective of the contact area of the measured object on the tower mounting surface. Therefore, it is possible to measure the load of the object to be measured stably and accurately. Further, since the flexure element 3 and the support member 2 (protrusion section 5) are connected with gaps provided in the lower (up) direction and left and right directions, the flexure element 3 supports Even if an attempt is made to move in a direction far away from the member 2, the above movement can be restricted, so that the device can be used stably.

In the above embodiment, both ends of the flexure element 3 are supported by 5, and inside the flexure element 3 are freely supported by 2, 2 so that the flexure element 3 is convex downward during measurement. As shown in FIG. 13, both ends of the flexure element 3 are supported by the support members 2 and 2, and the flexure element 3 is supported by the protrusion 5 inside the flexure element 3, as shown in FIG. At times, the strain body 3 may be configured to be deformed so as to be convex upward.

Further, in the above example, the supporting member 2 and the projection 5 are extended in the width direction of the strain body 3, and the cross-sectional shape is the strain body 3.
Although a semicircular columnar body convex to the side is used, the cross-sectional shape is not limited to this. The cross-sectional shape may be, for example, an elliptical shape, a triangular shape, or a spherical shape protruding toward the strain body 3.
Further, the above-mentioned convex portion is formed by the supporting member 2 and the flexure element 3 of the protrusion 5.
It is sufficient that only the vicinity of the portion supporting the support member is provided, and it is not always necessary to provide the convex portion over the entire length direction of the support member 2 and the protrusion 5.

Further, in the above example, the strain gauge 4 is adhered to the central portion of the flexure element 3, but as shown in FIG. Any portion inside the contact position with the protrusion 5 except for the section (section A in the figure) may be used, and on the lower surface of the flexure element 3, any part between the protrusions 5 (section B in the figure). You may.

[0029]

As described above, according to the first aspect of the present invention, the load table for mounting the object to be measured, the load table for mounting the object to be measured, and the load points of the load table A long strain body joined to the load table via a supporting member, a strain detecting means for detecting a strain in the longitudinal direction of the strain body, and a frame for accommodating the strain body And a frame having a projection that supports the strain body from the side opposite to the load table, and extends the support member in the width direction of the strain body, and has a cross-sectional shape on the strain body side. The load table and the flexure element are brought into point or line contact with each other, so that the magnitude of the moment acting on the flexure element regardless of the area of contact with the tower mounting surface of the object to be measured. Height and the load on the object to be measured can be measured stably and accurately.

According to the second aspect of the present invention, the protrusion is a columnar body extending in the width direction of the strain body and having a cross-sectional shape protruding toward the strain body. It is only necessary to have strength enough to withstand a vertical load caused by point or line contact with the flexure element, so that the protrusions can be made smaller, and the overall device can be made thinner and lighter.

According to the third aspect of the present invention, the means for restricting the movement of the strain body in the direction away from the support member or the protrusion is provided. Even if an attempt is made to move in a direction far away from the part, the movement can be restricted, so that the device can be used stably.

According to the fourth aspect of the present invention, a through hole is provided at a contact portion of the strain body with the support member, and an insertion portion having an outer shape smaller than the inner diameter of the through hole; A connecting member provided at an upper portion and having a head having an outer shape larger than the inner diameter of the through hole, in a state in which the connecting member is not in contact with the surface from the surface opposite to the support member protrusion of the strain body. Then, since it is attached to the support member and restricts the movement of the flexure element, the movement of the flexure element can be restricted with a simple configuration.

According to the fifth aspect of the present invention, a through hole is provided at a contact portion of the strain body with the projection, and an insertion portion having an outer shape smaller than the inner diameter of the through hole; A coupling member provided at the upper part and having a head having an outer shape larger than the inner diameter of the through hole, from the surface opposite to the protrusion of the strain generating element, in a state of not contacting the surface, Since the movement of the flexure element is restricted by attaching to the protrusion, the movement of the flexure element can be restricted with a simple configuration, and when the frame body is slightly deformed due to the unevenness of the installation surface. In addition, unnecessary deformation of the flexure element can be prevented, and stable load measurement can be performed.

According to the sixth aspect of the invention, the outer dimensions of the load table are made larger than the inner dimensions of the frame.
If the load table is deformed downward when the object to be measured is placed on the load table, the frame section serves as a stopper, and the magnitude of the force and moment acting on the load table and the strain element may be limited. As a result, the thickness of the load table and the flexure element can be reduced.

According to the seventh aspect of the present invention, since at least one of the frame portions is provided with the tapered portion, the object to be measured can be easily mounted on the top plate.

According to the eighth aspect of the present invention, the first aspect is provided.
According to the configuration, a load of up to 100 kg can be measured, and the thickness from the bottom of the frame to the upper surface of the load table can be set to 25 mm or less, so that a high-performance and compact load measuring device can be obtained. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view showing a load measuring device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a load measuring device according to the embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a frame according to the present embodiment.

FIG. 4 is a diagram showing a configuration of a strain body according to the present embodiment.

FIG. 5 is a diagram showing a configuration of a top plate according to the present embodiment.

FIG. 6 is a view for explaining deformation of a flexure element.

FIG. 7 is a diagram illustrating a relationship between a distributed load and a moment at a fixed support.

FIG. 8 is a diagram showing a relationship between a distributed load and a moment in free support.

FIG. 9 is a diagram showing a method of measuring a distortion amount.

FIG. 10 is a diagram showing a state of the top plate when the object to be mounted is placed on an end of the top plate.

FIG. 11 is a diagram showing a relationship between a frame of the load measuring device and an installation surface.

FIG. 12 is a diagram showing the position of an elastic body provided on the bottom surface of the frame.

FIG. 13 is a view showing another example of the load measuring device of the present invention.

FIG. 14 is a diagram showing a position where a strain gauge is attached.

FIG. 15 is a diagram showing a configuration of a conventional load measuring device.

[Explanation of symbols]

1 top plate, 2 support members, 3 strain body, 4,
4a, 4b strain gauge, 5 protrusion, 6 frame, 6A
Frame body, 6a bottom plate, 6b frame, 6B groove, 6C
Riding section, 6k slope section, 6d bent section, 6D
Seal member, 10 Load measuring device.

Claims (8)

[Claims] 1. A load table on which an object to be measured is mounted, an elongated strain body joined to the load table via a support member serving as a load point of the load table, Load measurement comprising a strain detecting means for detecting a strain in the longitudinal direction, and a frame having a frame for accommodating the strain generating body and a projection for supporting the strain generating body from the side opposite to the load table. In the device, the support member extends in the width direction of the strain body,
A load measuring device, wherein a cross-sectional shape is a columnar body that is convex toward the strain-generating body. 2. The load measuring device according to claim 1, wherein the projecting portion is a columnar body extending in the width direction of the strain body and having a sectional shape convex toward the strain body. 3. The load measuring device according to claim 1, further comprising means for restricting movement of the strain body in a direction away from the support member or the protrusion. 4. A through hole is provided at a contact portion of the strain body with the support member, an insertion portion having an outer shape smaller than an inner diameter of the through hole, and an insertion portion provided at an upper portion of the insertion portion, and A connecting member having a head having an outer shape larger than the inner diameter is attached to the support member from a surface of the strain generating body opposite to the support member protrusion, in a state of not contacting the surface, The load measuring device according to claim 3, wherein the movement of the flexure element is restricted. 5. A through-hole is provided at a contact portion of the strain body with the projection, and an insertion portion having an outer shape smaller than the inner diameter of the through-hole; A connecting member having a head having an outer shape larger than the inner diameter, from the surface of the strain-generating body opposite to the protrusion, attached to the protrusion without contacting the surface,
The load measuring device according to claim 3, wherein the movement of the flexure element is restricted. 6. The load table according to claim 1, wherein an outer dimension of the load table is larger than an inner dimension of the frame portion.
The load measuring device as described. 7. The load measuring device according to claim 1, wherein a tapered portion is provided on at least one piece of the frame portion. 8. A load measuring device capable of measuring a load up to 100 kg, wherein a thickness from the bottom of the frame to the upper surface of the load table is 25 mm or less. measuring device.