JPH10325751A - Support structural body for load cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a support structural body by a method wherein a structure is arranged to make open a mechanism part or the like easily corrodible with the infiltration of rainwater and a chemical for washing and can restrict the movement of first and second plates relatively in the parallel and vertical directions while enabling highly simplifying of adjustment in setting. SOLUTION: This structural body includes a first plate 101 fixed parallel on a foundation such as base, a second plate 102 facing the first plate 101 at an interval to receive the weight of an object to be weighed and a load cell 104 which is interposed between the first and second plates 101-102 to measure a value of a weight loaded on the second plate 102. Now, the two plates 101-102 are connected by a link means 106, which 106 is born on the plates 101-102 while at least one bearing part is loosely fitted into the plate. Thus, the distance separating the two plates 101-102 is restricted by the loosely fitted part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load cell support structure, and more particularly, to a load cell support structure used as a measuring element in a raw material storage structure of a food plant, a sewage tank, a storage tank, a hopper or a platform scale of a water treatment facility. The present invention relates to a load cell support structure.

[0002]

2. Description of the Related Art The weight of a raw material storage structure of a food plant, a sewage tank of a water treatment facility, a hopper for storing powder used as feed in a poultry farm or a ranch, or a tank for storing a liquid such as fuel is measured. In this case, the measurement is performed using a load cell set on a load cell support structure interposed between the base and these hoppers / tanks. The structure supporting the load cell has an earthquake-resistant structure. As an example of such a load cell support structure, for example, a structure described in JP-A-8-4576 can be mentioned.

[0003] Next, a measuring support structure, which is the above structure, will be briefly described with reference to FIGS. 10 and 11. The above-mentioned conventional support structure 30 for measurement includes an upper mounting plate 39 on which a support bracket 37 mounted on an outer wall of an object to be weighed such as a hopper is mounted and fixed, and a lower part fixed to a beam 31 serving as a base body such as a base. The upper mounting plate 39 and the lower mounting plate 34 have a positional relationship parallel to each other. A load cell 70 for detecting the weight of the object to be weighed is provided between the upper mounting plate 39 and the lower mounting plate 34. As shown in FIG. 10, the upper mounting plate 39 is not separated in the Y direction shown in FIG. 11 by an external force such as an earthquake.
A bar-shaped member 60 is screwed into the screw hole 61 in the lower mounting plate 34 and is fixed by a spring washer 62 and a nut 63, and the upper end of the horizontal mounting plate 37 is mounted and fixed on the upper mounting plate 39. It penetrates and loosely fits into a hole provided in 37-1, and a horizontal plate 37-1 is prevented from coming off by a washer 80, a nut 81, and a lock nut 82.

Further, the upper mounting plate 3 is exposed to external force such as an earthquake.
A metal plate fixed to the upper end of a square metal plate 45 provided on the lower surface of the upper mounting plate 39 and a bracket 40 erected on the upper surface of the lower mounting plate 34 so that the base plate 9 does not separate in the X direction shown in FIG. A connecting means rotatably connected to these is provided between them. The connecting means is a metal plate 4
A link 42 is rotatably supported on a shaft 43 by a shaft 43 in a vertical direction, a link 46 is rotatably supported on a square metal plate 45 by a shaft 47 in a vertical direction, and a drive screw 51. Have been. The ends of the links 42 and 46 are threaded in opposite directions. In contrast to these screws, a drive screw 51 having opposite ends threaded from both ends inside a cylindrical drive screw 51. Screwed. When the head 50 of the drive screw 51 is rotated in one direction, the links 42, 46 move in a direction approaching each other, and when rotated in the opposite direction, they move in a direction away from each other.

The connecting means holds the upper mounting plate 39 so as not to move in the X direction with respect to the lower mounting plate 34 when an external force such as an earthquake or a strong wind is applied to the upper mounting plate 39. . As described above, the links 42 and 46 are rotatable in the vertical plane direction. However, when the upper mounting plate 39 and the lower mounting plate 34 are displaced in the horizontal direction (Z direction) due to thermal expansion or the like. In order to prevent the bearing portions of the links 42 and 46 from being damaged, a slight horizontal rotation is allowed in this portion by using a ball joint mechanism such as a rod end bearing. The hopper or the like to be weighed is supported on a base or the like by the support structure of the plurality of load cells configured as described above.

[0006]

As described above, the conventional load cell support structure has the following problems. There are many gaps such as fittings in the bearings of the rod end portions (links) 42 and 46, and when the metal contents are easily corroded, they penetrate into the bearings or are used for cleaning. When the cleaning chemicals or rainwater easily enters and accumulates due to the capillary phenomenon, the corrosion at the rod end (link) tends to accelerate rapidly. In order to absorb a dimensional error in the X direction of the lower mounting plate 34, the connecting means has a screw structure.
In order to remove the distortion between the upper mounting plate 39 and the lower mounting plate 34 by the rotation of the screw, simulated weighing is performed and judgment is made based on the magnitude of the error, and the support structure of one load cell is adjusted. Then, the support state of other things changed, so the adjustment of the round-trip state such as re-adjustment continued, so it took considerable time and experience to install.When installing the load cell support structure, it was formed on a hopper etc. If the mounting hole has poor dimensional accuracy and does not match the position of the mounting hole formed in the upper mounting plate 39, the driving screw 51 must be rotated to align the position. Horizontal plate 3
7-1 is provided with a hole through which the bar-shaped member 60 for restricting the movement of the hopper or the like in the Y direction is inserted. However, the relative displacement between the upper mounting plate 39 and the lower mounting plate 34 may be reduced. At most, the hole must be large so that the bar-shaped member 60 can be inserted, and a thick and strong washer must necessarily be provided for holding the bar-shaped member 60.

An object of the present invention is to solve the above-mentioned conventional disadvantages, and an object of the present invention is to provide a first plate fixed in parallel to a foundation such as a base, and a gap between the first plate and the first plate. A second plate which is opposed to and receives the weight of the object to be weighed;
And a load cell interposed between the second plate and the load cell for measuring a weight value applied to the second plate, a portion where corrosion accelerates due to intrusion of rainwater or a cleaning chemical. And a load cell support structure capable of limiting the movement of the first and second plates in the parallel and vertical directions relative to each other and making adjustment during setting as simple as possible. It is in.

[0008]

In order to achieve the object of the present invention as described above, the present invention comprises a first plate fixed parallel to a foundation such as a base, and a first plate fixed to the base. A load cell including a second plate facing the object to be weighed at a distance and receiving a weight of the object to be weighed, and a load cell interposed between the first and second plates to measure a weight value applied to the second plate. In the supporting structure of the above, the two plates are connected by connecting means,
The connecting means is supported on each plate, and at least one bearing portion is loosely fitted on the plate so that the loose fitting portion limits the distance between the two plates. And a support structure for the load cell.

According to the present invention, in the above invention, the connecting means is provided with long through holes at both ends in a longitudinal direction, and these through holes are inserted with pins protruding from a plate, and the pins abut against the outer edges of the through holes. One end of the connecting means is rotatably mounted on the plate, and the other end has a longitudinally long through-hole, which projects from the plate. There is provided a load cell indicating structure, wherein the pin is inserted and the pin abuts on the outer edge of the through hole to limit a distance between the two plates.

Further, the invention is characterized in that, in the above invention, the connecting means is provided at two places on both sides of the plane of the plate with the load cell as the center, and the connecting means is provided on the plate with the load cell as the center. Almost 12 in a plane
The load cell support structure is provided at three positions in a direction of 0 degrees, and the connecting means is provided at four positions in a direction of approximately 90 degrees on a plane of the plate with the load cell as a center. I will provide a.

Further, the present invention provides a method in which a ball provided at one end of a rod-shaped connecting means is inserted through a rod-shaped portion of the connecting means, and when the plates are separated from each other, the ball comes into contact with a peripheral edge to form two plates. And a hole provided in a plate for limiting a separation distance of the load cell.

In addition, the present invention provides a load cell support structure, characterized in that a connecting means inclined to two plates arranged in parallel connects the two plates.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a support structure of a load cell according to the present invention. In FIG. 1, a support structure of the load cell includes an upper plate 101 attached to a support fitting provided on an object to be weighed such as a hopper and a lower plate 102 fixed to a supporter such as a beam fixed to a foundation such as a base.
Having. The upper plate 101 and the lower plate 102 are formed in a rectangular shape, and are arranged in parallel with each other. These upper plates 101
A load cell 103 is arranged between the lower plate 102 and the lower plate 102.

A connecting plate 106 is arranged between the side surfaces of the upper plate 101 and the lower plate 102. At the upper and lower ends of the connecting plate 106, rectangular through holes 10 long in the longitudinal direction of the connecting plate 106 are provided.
7, 108 are formed. These through holes 107, 1
08, pins 109 and 110 penetrate and are screwed to the side surfaces of the upper plate 101 and the lower plate 102. Heads 111 and 112 for preventing the connection plate 106 from coming off are formed on the heads of the pins 109 and 110. In addition,
Since the length from the upper end of the through hole 107 to the lower end of the through hole 108 is formed slightly longer than the interval between the pins 109 and 110, the connecting plate 106 can be slid slightly in the longitudinal direction.

FIG. 2 is a front view showing a state where the support structure of the load cell configured as described above is mounted on the measurement structure of the object to be weighed. In the figure, reference numeral 113 denotes an object to be weighed such as a hopper for storing granular solids such as powder, liquid, and plastic chips. On both sides of the object 113,
Two support plates 114, 115, 116 (not shown) and 117 (not shown) are provided respectively. A supporter 120 such as an H-shaped steel is stretched over the edge of the space 119 formed in the foundation 118 such as a base. This supporter 1
The support structure 121, 122, 123, 12 of the load cell according to the present invention is provided between the top surface of the load cell 20 and the support plates 114 to 117 provided on the side surface of the object 113, respectively.
4 is attached. The weight of the object 113 is transmitted from the support plates 114 to 117 to the upper plate 101 of the support structure of each load cell, a load is applied to the load cell 103 with the lower plate 102, and the weight of the object 113 is measured by each weight detection element. The weight of the sample is detected.

The arrows shown in FIG. 3 indicate the direction in which the load cell support structure is mounted.
01 and the lower plate 102 indicate directions in which the connecting plate 106 moves relative to each other while rotating the connecting plate 106 with respect to the pins. In this mounting state of the load cell support structure, if an external force is applied to the object 113 in the X direction shown in FIG. 3, as shown in FIG.
No matter which X direction the upper plate 101 and the lower plate 102 move, the pins 109 and 110
Since the connecting plates 106 are in contact with the outer edges of the connecting plates 7 and 108, a tensile force is applied to the connecting plates 106. Therefore, even if the object 113 is largely displaced, the load cell support structure, the object to be weighed,
0 will not be damaged.

Assuming that an external force is applied to the object 113 in the Z direction shown in FIG. 3, the upper plates 101 and the lower plates 102 of the support structures 121 and 124 are provided as shown in FIG.
Moves in any Z direction, the pins 109,
Since the 110 abuts on the outer edges of the through holes 107 and 108, respectively, a tensile force acts on the connecting plate 106. Therefore, there is no possibility that the object 113 is significantly displaced and the support structure of the load cell, the object, and the supporter 120 are damaged. Furthermore, even if an external force acts obliquely in the intermediate direction between the X direction and the Z direction, the support structure of each load cell arranged at an angle of 90 degrees causes the object 113 to be weighed due to the restriction of the pulling of the connecting plate 106. There is no possibility that the support structure of the load cell, the object to be weighed, and the support structure 120 are damaged due to a large displacement. Further, even if the upper plate 101 rises upward, the pins 109 and 110 abut against the outer edges of the through holes, and an accident such that the upper plate 101 and the lower plate 102 separate from each other does not occur.

FIG. 5 is a perspective view showing a second embodiment of the present invention. As can be seen from this figure, the support structure of the load cell is almost the same as that of the first embodiment,
The lower end of the connecting plate 106 is not provided with a through hole, but is only pivotally connected by a pin 110, and the lower end has a semicircular arc 125 at the corner. For this reason, even if the thickness of the lower plate 102 is thin, the lower end does not project below the edge of the lower surface of the lower plate 102 when the connecting plate 106 rotates. The operation and effect when the upper plate 101 moves in the X, Y, and Z directions are substantially the same as those in the first embodiment, and therefore, detailed description is omitted.

FIG. 6 is a perspective view showing a third embodiment of the load cell support structure according to the present invention. In FIG.
The support structure of the load cell has an upper plate 401 attached to a support fitting provided on an object to be weighed such as a hopper, and a lower plate 402 fixed to a supporter fixed to a foundation such as a base. The upper plate 401 and the lower plate 402 are arranged in parallel with each other. A load cell 403 is provided between the upper plate 401 and the lower plate 402.

Between the side surfaces of the upper plate 401 and the lower plate 402, 2
The connecting plates 406 of the book are arranged in a katakana “C” shape. At the upper and lower ends of the connecting plates 406, 406, rectangular through holes 407, 4 long in the longitudinal direction of the connecting plate 406 are provided.
08 is formed. Pins 409 and 410 pass through these through holes 407 and 408, and the upper plate 401 and the lower plate 40
2 is screwed to the side. In addition, these pins 40
Heads 411 and 412 for preventing the connection plate 406 from coming off are formed on the heads of the heads 9 and 410. The connecting plate 406 is provided to be inclined with respect to the upper plate 401 and the lower plate 402, and the distance from the upper end of the through hole 407 to the lower end of the through hole 408 is formed to be slightly longer than the interval between the pins 409 and 410. Therefore, the connecting plate 106 can move slightly slidably in the longitudinal direction. It is needless to say that a plurality of support structures for the load cell are provided with respect to the object to be weighed and the strength in the horizontal direction is average, as in the first embodiment.

FIG. 7 is a perspective view showing a fourth embodiment of the load cell support structure according to the present invention. This embodiment differs from that of FIG. 6 only in that the connecting plate 406 is pivotally supported at both ends in holes 501 and 502 formed in the upper plate 401 and the lower plate 402, and therefore, the details of the structure are different. Detailed description is omitted.

In the load cell support structure shown in FIGS. 6 and 7, it is assumed that an external force is applied to the object to be weighed in the + X direction, and the upper plate 401 moves in the + X direction as shown in FIG. 407, 40 of the through holes of the right connecting plate 406
The pins 409 and 410 abut against the lower end of the right connecting plate 406 to apply a compressive force to the right connecting plate 406, and the upper and lower ends of the through holes 407 and 408 of the left connecting plate 406 respectively
9, 410 abut against each other to exert a tensile force on the left connecting plate 406. It is assumed that the upper plate 401 has moved in the −X direction. Pins 409 and 410 abut the lower ends of the through holes 407 and 408 of the left connecting plate 406 to apply a compressive force to the left connecting plate 406, and the through holes 407 and 407 of the right connecting plate 406.
Pins 409 and 410 abut the upper and lower ends of 408, respectively, to exert a tensile force on the right connecting plate 406. Therefore, there is no possibility that the object to be weighed is significantly displaced and the support structure of the load cell, the object to be weighed, and the supporter are damaged. Furthermore, even if an external force acts obliquely in the intermediate direction between the X direction and the Z direction, the load cell support structure, which is arranged at an angle of 90 degrees, greatly reduces the weight of the object to be weighed due to the restriction of the pulling of the connecting plate. The support structure of the load cell, the object to be weighed, and the support structure are not damaged due to misalignment. further,
Even if the upper plate 401 rises upward, the pins 409 and 410 abut against the outer edges of the through holes, and an accident such that the upper plate 401 and the lower plate 402 separate from each other does not occur.

FIG. 9 is a partial front view showing a fifth embodiment of the load cell support structure according to the present invention. In FIG. 9, the support structure of the load cell includes an upper plate 601 attached to a support bracket provided on an object to be weighed such as a hopper and a lower plate 60 fixed to a supporter fixed to a foundation such as a base.
2 The upper plate 601 and the lower plate 602 are arranged in parallel with each other. A load cell 603 is provided between the upper plate 601 and the lower plate 602. A mortar-shaped receiving hole 604 is formed in the upper plate 601, and a ball 606 provided at one end of a connecting rod 605 serving as connecting means is fitted therein. The lower end of the connecting rod 606 is rotatably supported by a screw 607.

In this embodiment, when the upper plate 601 and the lower plate 602 are in a normal position, the ball 606 of the connecting rod 605 slightly rises from the receiving hole 604, but the upper plate 601 moves in the X direction. If so, the connecting rod 6
05 rotates slightly around the screw 607, and the ball 60
6 fits into the receiving hole 604, applies a tensile force to the connecting rod 605, and does not permit any further movement of the upper plate 601.
The support structure of the load cell is the same as that of the first embodiment.
Similarly to the above, it goes without saying that a plurality of objects are arranged for the objects to be weighed so that the intensity in the horizontal direction is average.

Although the present invention has been described above with reference to a plurality of embodiments, various modifications and applications are possible within the scope of the gist of the present invention. It is not excluded.

[0026]

As described in detail above, the present invention provides
The two plates are connected by connecting means, and the connecting means is mounted on each plate, and at least one bearing portion is loosely fitted on the plate, and the loose fitting portion allows the two plates to be connected. Since it has a structure that limits the distance of separation, the connecting means has a simple structure without a screw portion or the like that adjusts the length as in the past, so that even if it comes in contact with chemicals or rainwater, these accumulate in the connecting means. Therefore, corrosion does not proceed at an accelerated rate on the connecting member. Further, even if the connecting means does not have a thread portion for adjusting the length, the mounting structure of the load cell can be positioned and mounted, so that the labor for adjustment can be omitted. Moreover, since the connecting means is provided with a function of limiting the moving distance of the two plates in the separating direction, it is possible to prevent an accident due to jumping of the object to be weighed with a simple structure.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a front view showing a state in which a load cell support structure according to the present invention is attached to an object to be weighed.

FIG. 3 is a top view showing a state where the support structure of the load cell according to the present invention is attached to an object to be weighed.

FIG. 4 is an explanatory diagram illustrating an operation of the first embodiment;

FIG. 5 is a perspective view showing a second embodiment.

FIG. 6 is a perspective view showing a third embodiment.

FIG. 7 is a perspective view showing a fourth embodiment.

FIG. 8 is an explanatory diagram illustrating an operation according to a fourth embodiment;

FIG. 9 is a partial front view showing a fifth embodiment.

FIG. 10 is a front view showing a conventional example.

FIG. 11 is a perspective view showing a part of a conventional example.

[Explanation of symbols]

 101 ... upper plate 102 ... lower plate 103 ... load cell 106 ... connecting plate 107 ... through hole 108 ... through hole 109 ... pin 110 ... pin 111 ... head 112 ... head 113 ... measured object 114 ... support plate 115 ... support plate 116 ... support plate 117 ... support plate 118 ... foundation 119 ... interval 120 ... Supporter 121 ・ ・ ・ Support structure 122 ・ ・ ・ Support structure 123 ・ ・ ・ Support structure 124 ・ ・ ・ Support structure 125 ・ ・ ・ Corner 201 ・ ・ ・ Upper plate 202 ・ ・ ・ Lower plate 203 ・ ・ ・ Load cell 204 ・..Case 205 ・ ・ ・ Loading table 206 ・ ・ ・ Hole 207 ・ ・ ・ Support shaft 208 ・ ・ ・ Head 209 ・ ・ ・ Support shaft 210 ・ ・ ・ Head 211 ・ ・ ・ Connecting plate 212 ・ ・ ・ Through hole 213 ... penetration 214 ... nut 215 ... nut 401 ... upper plate 402 ... lower plate 403 ... load cell 406 ... connecting plate 407 ... through hole 408 ... through hole 409 ... pin 410 ... pin 411 ... head 412 ... head 413 ... object to be measured 414 ... support plate 415 ... support plate 416 ... support plate 417 ... support plate 418 ... Foundation 419 ・ ・ ・ Interval 501 ・ ・ ・ Hole 502 ・ ・ ・ Hole 601 ・ ・ ・ Upper plate 602 ・ ・ ・ Lower plate 603 ・ ・ ・ Load cell 604 ・ ・ ・ Receiving hole 605 ・ ・ ・ Connection rod 606 ・ ・ ・ Ball 607 screw

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[Procedure amendment]

[Submission date] June 6, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0002

[Correction method] Change

[Correction contents]

[0002]

2. Description of the Related Art The weight of a raw material storage structure of a food plant, a sewage tank of a water treatment facility, a hopper for storing powder used as feed in a poultry farm or a ranch, or a tank for storing a liquid such as fuel is measured. In this case, the measurement is performed using a load cell set on a load cell support structure interposed between the base and these hoppers / tanks. The structure supporting the load cell has an earthquake-resistant structure. An example of such a load cell support structure, for example, the real
It may be mentioned those described in fair 8-4576 JP.

Claims (8)

[Claims] A first plate fixed parallel to a foundation such as a base; a second plate facing the first plate at an interval and receiving the weight of an object to be weighed; A load cell interposed between the first and second plates for weighing a weight value applied to the second plate; and a load cell supporting structure, wherein the two plates are connected by coupling means, and The connecting means is supported on each plate, and at least one bearing portion is loosely fitted on the plate, and the loose fitting portion allows the bearing to be connected to the plate.
A support structure for a load cell, having a structure for limiting a distance between two plates. 2. The connecting means has longitudinally extending through holes at both ends thereof. The through holes are provided with pins protruding from the plate, and the pins are in contact with the outer edges of the through holes to increase the distance between the two plates. The load cell support structure according to claim 1, wherein the load cell support structure has a restricting structure. 3. One end of the connecting means is rotatably mounted on a plate, and the other end has a longitudinally long through-hole. A pin protruding from the plate is inserted through the through-hole. 2. The load cell support structure according to claim 1, wherein the support structure has a structure for limiting a distance between the two plates in contact with each other. 4. The support structure for a load cell according to claim 1, wherein said connecting means is provided at two places on the plane of said plate centering on said load cell and on both sides thereof. 5. The support structure for a load cell according to claim 1, wherein said connecting means is provided at three positions in a direction of approximately 120 degrees on the plane of said plate with respect to the load cell. 6. The support structure for a load cell according to claim 1, wherein said connecting means is provided at four positions in a direction substantially at 90 degrees with respect to the plane of said plate with respect to said load cell. 7. A ball provided at one end of a rod-shaped connecting means,
The ball has a hole provided in the plate for inserting the rod-shaped portion of the connecting means so that when the plates are separated from each other, the ball comes into contact with a peripheral edge to limit a distance between the two plates. Item 2. A support structure for a load cell according to item 1. 8. The load cell supporting structure according to claim 1, wherein a connecting means inclined to the two plates arranged in parallel connects the two plates.