JPH10221156A - Relatively thin weight measuring apparatus easy to extend or remove according to length of object measured - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow adaptation to the length of a measured object by arranging a first unit having load cells of a first carrier base provided with a receiving parts for linking, a second unit having load cells of a second carrier base to be linked to the first carrier base and a third unit having load cells of a third carrier base to be linked to the first carrier base to be linked elastically. SOLUTION: A first unit has a first carrier base 8a provided with receiving parts at front and rear end parts and more than three load cells therebelow. A second unit 3 has a second carrier base 8b and more than one load cells to be linked to the front side of the first unit 2. A third unit 4 has a third carrier base 8c and more tan one load cells to be linked to the rear side of the first unit 2. The receiving parts at the front and rear end parts of the first carrier base 8a are elastically linked to joint parts of the second and third carrier bases 8b and 8c through attachments each having a rubber part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weighing apparatus which can be easily added in accordance with the length of an object to be measured and which is relatively thin, and particularly relates to vehicles such as various trucks having different vehicle lengths. It is suitable for performing weight measurement.

[0002]

2. Description of the Related Art For example, a conventional apparatus for measuring the weight of a vehicle such as a truck is shown in FIGS. 18 (a) and 18 (b).
Two main girders 101 are arranged along the vehicle traveling direction 100, and a plurality of pallets 103 are juxtaposed on a plurality of horizontal girders 102 laid over these main girders 101 to form a rectangular shape. Mounting table 104
The load cell 105 is arranged below each corner of the mounting table 104 (specifically, both ends of each main girder 101), and the load of the object to be measured mounted on the mounting table 104 is reduced. A structure supporting at four points is common.

The installation of such a device is generally performed in a pit or on a normal road surface using a slope, and the former is generally used from the viewpoint of pit formation cost. It is desirable to make the pit depth as shallow as possible, and the latter is not limited to the installation place, but can be applied only when the height of the entire apparatus is relatively low. Therefore, it is desired that the height of the entire apparatus be as low as possible.

[0004]

However, the conventional apparatus described above has the longest vehicle length among the vehicles that can be measured when performing weight measurement of various vehicles including trucks having a long vehicle length. To accommodate long vehicles,
The main girder (when measuring the weight of a truck, the length of the main girder is usually about 8 m) must be considerably lengthened, and when the main girder is lengthened, the rigidity needs to be improved accordingly. For this reason, it is necessary to increase the height h of the main girder to a shape that increases the section modulus and the second moment of area, that is, to increase the height H of the entire device. Is not preferred.

[0005] Therefore, in the case of this device, since it can be installed only in a pit having a deeper pit depth, the cost of forming the pit becomes higher, and the device cannot be used on ordinary roads. It was quite limited.

As a means for reducing the main girder height h, as shown in FIG. 19 (b), the number of load cells 105 supporting the main girder 101 is increased to reduce the distance a between the support points. However, this is useful in that the rigidity required for the main girder 101 can be reduced.

[0007] However, increasing the number of load cells 105 installed causes inconveniences such as deterioration of installation workability.

That is, when the number of load cells 105 installed is increased, one long main girder 101 is supported by three or more load cells 105. As a result, a large area mounting table is supported by a total of six. Since it is performed with more than one load cell, it is necessary to individually adjust the height of these load cells so that they are positioned on the same plane, for example, by laying a liner or shim under the load cell or base plate. It is difficult to increase the number of installations. In addition to this, considering that the floor surface 106 to be actually installed usually has some unevenness, undulation, inclination, or the like, such an adjustment is made. It was practically difficult to do.

Therefore, in a device in which three or more load cells are arranged on each main girder as long as about 8 m, it is impossible as a practical problem to adjust the heights of all the load cells within the same plane.

When the height of the load cell cannot be adjusted in the same plane, the load of the object to be measured does not work evenly on each load cell, and the load cell is rattled. Sex was worsened.

Further, in order to make the vehicle weight measuring device compact from the viewpoint of saving space, etc., it is preferable that the mounting table can be easily added or removed in accordance with the vehicle length of the vehicle. The use of digits is not preferred.

Therefore, it is necessary for the weight measuring devices of various vehicles having different vehicle lengths to have a compact configuration that can easily add or remove a mounting table according to the vehicle length without using a long main girder. Was. An example of this configuration is described in, for example, Japanese Patent Application Laid-Open No. H5-248929.

As shown in FIG. 20A, the track scale described in this publication has horizontal beams 10 between load cells 110.
9 or more units are arranged, and the divided deck part is bridged between the horizontal beams 109 to form a deck. The main girder is composed of a plurality of divided vertical beams 108. .

However, this track scale is
As shown in (b), at the time of assembly, the longitudinal beams 108 or the longitudinal beams 108 and the lateral beams 109 are rigidly connected by bolts 107 or the like at the time of assembling. In order to align the holes, it is necessary to adjust the position, height, and the like of the load cell 110 in advance, and in addition, there may be a problem such as rattling similarly to the above.

Further, when the main girders are rigidly connected to each other with bolts or the like, and the height of the load cell is not in the same plane, sufficient measurement accuracy cannot be obtained. In the worst case, there is a possibility that the connecting portion is broken and a device failure occurs.

As means for relieving the stress concentrated on the connecting portion, adjacent vertical beams 108 are connected to each other by means of FIGS. 21 (a), 21 (b) and 21 (b).
As shown in (c), it is useful to have a structure in which the pin 112 is rotatably connected in a vertical direction 113 about a pin 112.

The device having this structure is a load cell 114
Even if the height position of the
Since the vertical direction of the connecting member 115 has a degree of freedom, the connecting portion 115 can rotate with respect to the force in the vertical direction 113 acting on the connecting portion, but the direction other than the vertical direction (for example, the arrow 116). Direction), the stress cannot be relieved against the force acting in the direction 116, and the connection may be broken as in the case described above. To do so, strict alignment is required, installation and installation become complicated, and installation workability deteriorates.

It is also conceivable to provide a large gap between the hole and the pin in order to provide a degree of freedom in directions other than the vertical direction. However, such a gap may cause backlash or the like. In addition to the danger of reduced durability and noise generation, sufficient measurement accuracy could not be obtained.

Therefore, an object of the present invention is to connect the mounting table by dividing the mounting table into at least three units and elastically connecting the mounting tables of the units in the longitudinal direction of the object to be measured. It is an object of the present invention to provide a comparatively thin weight measuring device which can easily add or remove a mounting table according to the length of an object to be measured without stress being concentrated on the portion.

[0020]

In order to achieve the above object, a weight measuring apparatus according to the present invention comprises a rectangular first mounting table provided with front and rear receiving portions for connection, and at least each corner portion thereof. A first unit having four or more load cells for supporting the first mounting table below the first mounting table, and a rear end provided with a mating portion that is located in front of the first unit and is connected to a receiving portion at the front end of the first mounting table. And a second support for supporting the second support below at least both front corners of the second support.
A second unit having at least two load cells, and a rectangular third mounting table provided at the front end with a mating portion located at the rear of the first unit and connected to a receiving portion at the rear end of the first mounting table. And a third unit having two or more load cells supporting the third mounting table below at least the rear two corners, and receiving parts at the front and rear ends of the first mounting table, and the second and third mounting units. The mating portions of the mounting tables are elastically connected via attachments each partially including a rubber-like elastic body.

In the case where the length of the object to be measured is considerably long, in order to enlarge the area of the mounting table, the end of the second and third mounting tables on the opposite side to the end provided with the mating portion. Are provided with receiving portions respectively, and at least one of these mounting tables is provided with a second
One or more enlarged units having the same configuration as the third unit can be elastically connected.

Preferably, the attachment is formed of two metal plates and a rubber-like elastic body interposed therebetween.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a weight measuring device according to the present invention will be described below with reference to the drawings. Fig. 1 (a),
(b) and (c) show an example of a typical truck weight measuring device of the present invention. The device 1 in this figure is mainly composed of three units 2, 3, and 4.

As shown in FIGS. 2 (a) and 2 (b), the first unit 2 has a rectangular first mounting table 8a provided with receiving portions 5 for connection at the front and rear ends 6, 7, and At least below each corner, four or more load cells 9a to support the first mounting table 8a.
Has 9d.

The first mounting table 8a has a ladder-like frame 13a formed by two main girders 11a and 11b juxtaposed along the traveling direction 10 of the vehicle and a plurality of horizontal girders 12 connecting them. , 13b
Are arranged side by side at intervals and the ladder-like frames 13a, 13b
The spaces are connected by a plurality of auxiliary girders 14, and L-shaped steel members are bolted to both end surfaces of the four main girders to form ends 6, 7 for forming the receiving portion 5 therewith. The ladder-like frame 13a, 13b has two steel plates 16a, 16b mounted thereon.

When the object to be measured is a truck, the first mounting table 8a needs to have a width of about 3 m. With such a wide width, the first mounting table 8a cannot be transported by a general truck. .

Therefore, in this case, as shown by the + mark in FIG. 2, for example, the first mounting table 8a is composed of a plurality of ladder-like frames, and the main girder is divided by bolts or the like. It may be configured so that it can be transported on a general truck.

Load cells 9a to 9d supporting the first mounting table 8a
Are located at least near the ends of the ladder-like frames 13a, 13b, respectively, and the ladder-like frames 13a, 13b
Is preferably attached to each of the load cell mounting portions 15 provided between the two main girders 11a and 11b. In this case, the height position X of the load cell mounting surface 15a of the mounting portion 15 is as shown in FIG. The main girder 11a, 11b or the horizontal girder 12 is disposed above the lower surface position Y of the main girder 11a, 11b or the horizontal girder 12.
When the lower surface position Y is mounted with the load cells 9a to 9d,
It is more preferable to set the apparatus to be located above the floor position Z where the apparatus is installed by an appropriate distance from the viewpoint of reducing the overall height H of the apparatus.

The main girders 11a, 11 constituting the first mounting table 8a
b is less than half the length of the conventional main girder (at most 4 m
), It is relatively easy to adjust the height of the load cells even if three or more load cells are arranged on each of the main girders 11a and 11b. Therefore, the load cells arranged on the first mounting table 8a are relatively easy. Can be increased as needed. In addition, as the number of load cells arranged on each of the main girders 11a and 11b increases, the height adjustment of the load cells becomes more difficult, but the rigidity of the main girder can be reduced and the height of the main girder can be reduced. It is preferable to set the number of load cells to be provided in consideration of both points.

The receiving portions 5 provided at the front and rear ends 6, 7 of the first mounting table 8a are provided for connecting the second and third units 3, 4 to the first mounting table 8a, respectively. It is preferable to provide two or more at each end. FIG. 2 shows a steel plate 16a for connecting signal cables from each load cell.
Is provided with an inspection port lid 53.

The second unit 3 has a rectangular second mounting table 8b.
And two or more load cells 9e and 9f, which are connected to the front side of the first unit 2. FIG. 4 is an enlarged view of the second unit 3 shown in FIG. It is preferable that the second mounting table 8b be formed of a ladder-like frame, like the first mounting table 8a. The load cells 9e and 9f supporting the second mounting table 8b are arranged at least below both front corners of the second mounting table 8b. A joining portion 19 is provided at the rear end 18 of the second mounting table 8b so as to be connected to the receiving portion 5 provided at the front end 6 of the first mounting table 8a.

The third unit 4 has a rectangular third mounting table 8c.
And two or more load cells 9g and 9h, and are connected to the rear side of the first unit 2. FIG. 5 is an enlarged view of the third unit 4 shown in FIG. The third mounting table 8c is preferably formed of a ladder-like frame, like the first mounting table 8a. The load cells 9g and 9h supporting the third mounting table 8c are arranged at least below both rear corners of the third mounting table 8c. At the front end 20 of the third mounting table 8c, there is provided a mating section for connecting to the receiving section 5 provided at the rear end of the first mounting table.
21 is provided.

FIGS. 4 and 5 show the case where the second unit 3 and the third unit 4 are formed to have the same size and shape in order to provide versatility. It can be changed as needed.

The basic unit of the apparatus according to the present invention is a structure composed of three units, namely, first to third units 2, 3, and 4. However, the length of the object to be weighed is considerably long. In some cases, the length is not enough. In this case, for example, as shown in FIG. 6, the second and third mounting tables 8b and 8
c is attached to an end 22 opposite to the ends 18 and 20 provided with the mating portions 19 and 21, respectively, on a receiving portion 5 provided on the first mounting table 8 a.
If a receiving portion 23 similar to that described above is provided, these mounting tables 8b and 8c
It is also possible to elastically connect one or more enlarged units having the same configuration as the second and third units 3 and 4 to at least one of the units.

Then, the apparatus of the present invention comprises the first mounting table 8a
Receiving portions 5 at the front and rear ends 6 and 7 of the second and third mounting tables 8
b, 8c are elastically connected to the mating portions 19, 21 via attachments 24 each having a rubber portion (FIG. 7 (a),
(b)).

8 to 10 show examples of the shape of the receiving portion 5 of the first mounting table 8a, the mating portions 19 and 21 of the second or third mounting tables 3 and 4, and the attachment 24, respectively.

The receiving portion 5 of the first mounting table 8a has one bottom 25
And three side walls 26a to 26c, and an attachment
It has dimensions that can place 24, and the bottom 25 has an attachment
Four bolt holes 17 are provided to connect 24 with bolts 27.

The mating portions 19, 2 of the second or third mounting tables 8b, 8c
1 comprises one bottom 28 and three side walls 29a to 29c. The bottom 28 has two bolt holes 30 for connecting to the attachment 24.

The attachment 24 includes a metal plate 32 having four bolt holes 31 at positions corresponding to the bolt holes 17 provided in the bottom 25 of the receiving portion 5 of the first mounting table 8a, and a second or third mounting table.
Bolt hole positions provided at the bottom 28 of the mating parts 19, 21 of 8b, 8c
Metal plate 34 integrally provided with two pins 33 corresponding to 30
And the rubber-like elastic body 35 interposed therebetween are preferably integrated, and the metal plates 32 and 34 and the rubber-like elastic body 35 may be of various shapes such as circular or square. Can be

The metal plates 32, 3 constituting the attachment 24
Preferably, steel is used as the material of No. 4, and NR, SBR, CR, urethane rubber or the like is preferably used as the material of the rubber-like elastic body 35.

An example of a method of attaching the load cells 9a to 9h to the load cell attaching portion 15 will be briefly described.
FIGS.11 (a) and (b) are views showing the mounted state,
12 (a) and (b) are views showing a state in the middle of mounting.

The load cell 9 is, for example, as shown in FIGS. 13 and 14, a rectangular center load receiving portion 46, a rectangular frame-shaped load cell fixing portion 47, and four beams connecting between them. And a central strain receiving portion 46.
Attachment fixing holes 46a are provided at the center of the load cell fixing portion 47, and four holes 49 for mounting to the load cell mounting portion 15 are provided at the four corners of the load cell fixing portion 47, and at both ends of the load cell fixing portion 47, respectively. A signal cable 50 and a recess 51 for a wiring terminal are provided, and a shear type strain gauge 52 is attached to both side surfaces of the strain-generating portion 48, and the strain of the strain-generating portion 48 generated by applying a load is measured by the strain gauge 52. It has a structure to detect, convert to electrical signals and output.

First, the load cell 9 is connected to the load cell mounting portion 15 with four bolts 36, and then, like the attachment 24 described above, two metal plates 37, 38,
After fixing the attachment 40 comprising the rubber-like elastic body 39 located therebetween to the base plate 41 with bolts 45 or the like, the load cell 9 and the attachment 40 are connected by bolts 42. Finally, the base plate 41 is connected to the floor surface 43. It is preferable to fix it with an anchor bolt 44 or the like.

Although FIGS. 11 and 12 show the case where the attachment 40 is arranged between the load cell 9 and the base plate, this is because even if the road surface is slightly tilted, Although the elastic body 39 is flattened by deformation and is not required to be provided with shims or the like, the elastic body 39 may be omitted. Also, this attachment 40
It may be arranged between the load cell and the frame, or between the load cell and the floor.

Next, a procedure for installing the apparatus of the present invention will be described. First, the first unit 2 is installed on a floor such as a road surface. Since the main girder length of the first unit 2 is less than half or one third of the main girder length of the conventional device, the height adjustment of the load cell can be performed relatively easily.

Next, the second unit 3 is added to the first unit 2.
Concatenate. At this time, if there is a height difference on the floor surface to be installed, if the height difference is small, as shown in FIG.
Even if the second mounting table 8b is slightly inclined with respect to the first mounting table 8a, the rubber-like elastic body 35 of the attachment 24 can be flexibly connected by deforming the rubber-like elastic body 35 of the attachment 24, and the load cell can be mounted. It is possible to prevent the measured load from being concentrated on some of the load cells without floating off the road surface or creating a gap between the frame and the load cells.

Further, even when the height difference is large, FIG.
As shown in, the height of the load cell may be roughly adjusted by laying a liner, shim, etc. under the load cell, and it is not necessary to strictly adjust the height of the load cell as in the case of the conventional device. , Easy installation.

The first unit 2 is connected to the second unit 3
After that, the third unit 4 is connected to the first unit 2 in the same manner as in the case of the second unit 3.

Further, if necessary, an enlargement unit can be connected to the second and third units 3 and 4 in a similar manner.

After the apparatus is installed on the floor in this way, if a tilting table is installed before and after the apparatus, the vehicle can be moved and mounted on the mounting table, whereby the load on the vehicle can be reduced easily. Can be measured.

Up to this point, each of the mounting tables 8a to 8c
Has been described as a ladder-shaped frame, but if the device height H may be slightly higher than that of the device of FIG. 1, the first unit 2 is replaced with the device shown in FIGS. 16 (a) and 16 (b). As shown in the figure, two short main girders 11a,
11b and a plurality of cross beams 12 form a frame, and main beams 11a,
It is also possible to adopt a configuration in which a load cell 9 is arranged below the lower portion 11b, and a configuration in which a mounting table such as a second unit is connected to the first unit 2 as shown in FIGS. 17 (a) and 17 (b). is there.

The above is merely an example of the embodiment of the present invention, and various changes can be made within the scope of the claims. The device of the present invention is not limited to measuring the weight of a vehicle, but can be applied to measure the weight of various objects to be measured.
If it is shorter than the size of the first mounting table of the unit, the second
It goes without saying that the first unit can be used without connecting the units and the like.

[0053]

Since the weight measuring device of the present invention has a structure in which three or more units are elastically connected via the attachment, the attachment can be attached even when the floor surface to be installed is slightly inclined. The height of each load cell can be arranged almost in the same plane without strict adjustment by the deformation of the rubber-like elastic body that composes, so that the load of the object to be measured is evenly applied to each load cell. As a result, stable measurement accuracy can be obtained. Further, even if stress is concentrated on the connecting portion, the rubber-like elastic body has an action of relaxing the stress, so that it is possible to prevent the connecting portion from being broken.

In addition, when transporting, if this connection is disconnected, a plurality of small units can be divided, so that transporting is facilitated. Further, by appropriately increasing the enlargement unit, it is possible to measure the weight of an object to be measured having a considerably long length.

Since this device is relatively thin, it can be installed not only in a pit but also on an ordinary road surface by using an inclined table.
The present invention is particularly suitable for measuring the weight of vehicles such as various trucks having different vehicle lengths.

[Brief description of the drawings]

FIG. 1 (a) is a plan view of a weighing device according to the present invention, in which a part of a steel plate has been cut away. (b) is a side view,
(c) is a front view.

FIG. 2A is an enlarged plan view of a first mounting table, in which a part of a steel plate has been cut away. (b) is a side view.

FIG. 3 is a diagram showing a positional relationship when a load cell is attached to a ladder-like frame, where (a) is a plan view and (b) is AA.
Sectional view, (c) is a BB section.

FIG. 4A is an enlarged plan view of a second mounting table, in which a part of a steel plate is cut away. (b) is a side view.

FIG. 5A is an enlarged plan view of a third mounting table, in which a part of a steel plate is cut away. (b) is a side view.

FIG. 6A is an enlarged plan view showing another embodiment of the second unit or the third unit (or an enlarged unit), and FIG. 6B is a side view.

FIG. 7 shows receiving portions 5 at front and rear ends 6, 7 of a first mounting table 8a;
FIG. 9 is a diagram when the mating portions 19 and 21 of the second and third mounting tables 8b and 8c are connected via an attachment 24, respectively.

FIG. 8 is an enlarged view mainly showing a receiving portion 5 of the first mounting table 8a.

FIG. 9 is an enlarged view mainly showing mating portions 19 and 21 of the second or third mounting tables 3 and 4;

FIG. 10 is an enlarged view of the attachment 24.

FIG. 11 is a diagram showing a state where a load cell is attached to a load cell attachment part 15;

FIG. 12 is a view showing a state in which a load cell is being mounted on the load cell mounting portion 15;

FIG. 13 is a diagram showing an example of the shape of a load cell.

14 is a diagram showing a cross-sectional shape of the load cell of FIG.

FIG. 15 is a diagram showing a case where the device is installed on a floor surface having a height difference.

FIG. 16 is a view showing another embodiment of the first unit.

FIG. 17 is a diagram showing another embodiment.

FIG. 18 is a view showing a conventional weight measuring device.

19A is a diagram showing a main girder and a load cell of a conventional device, and FIG. 19B is a diagram for explaining means for reducing the main girder height h.

FIG. 20 is a diagram showing a conventional weight measuring device.

FIG. 21 is a diagram showing a weight measuring device in which each unit is connected to be rotatable up and down around a pin.

[Explanation of symbols]

 1 Weight measuring device 2 First unit 3 Second unit 4 Third unit 5 Receiving part 6,7 End of first unit 2 8a First mounting table 8b Second mounting table 8c Third mounting table 9,9a to 9h Load cell 10 Vehicle traveling direction 11a, 11b Main girder 12 Cross girder 13a, 13b Ladder-shaped frame 14 Auxiliary girder 15 Load cell mounting part 16a, 16b Steel plate 17 Bolt hole 18 Rear end of second mounting table 8b 19 Rear end 18 Fitting part 20 Front end part of third mounting table 8c 21 Fitting part provided on front end part 22 Front end part of second mounting base or rear end part of third mounting base 23 Receiving part provided on end part 23 24 Attachment 25 Bottom part 26a-26c of receiving part 5 Side wall part 27 of receiving part 5 Bolt 28 Bottom part 29a-29c of mating part 19 or 21 Side wall part of mating part 19 or 21, 30, bolt hole 32,34 Metal plate 35 Rubber-like elastic body 36 bolt 37,38 metal plate 39 rubber-like elastic body 40 attachment 41 base plate 42 bolt 43 floor 44 anchor bolt 45 bolt 46 central 受荷 heavy portion 47 load cell fixed portion 48 strain generating portion 49 hole 50 signal cable 51 wiring terminal recess 52 strain gauge 53 inspection opening lid

Claims (3)

[Claims] A first mounting table having a rectangular first mounting table provided with front and rear receiving portions for coupling, and four or more load cells supporting the first mounting table below at least each corner thereof. Unit, a rectangular second mounting table provided at the rear end with a mating portion for connecting to the receiving portion at the front end of the first mounting table, which is located in front of the first unit, and at least the front two corners of the second mounting table. Second down
A second unit having two or more load cells supporting the mounting table, and a rectangle located at the rear of the first unit and provided at the front end with a mating portion for connecting to a receiving portion at the rear end of the first mounting table. A third mounting table, and a third mounting table
A third unit having two or more load cells for supporting the mounting table, wherein the receiving portions at the front and rear ends of the first mounting table and the mating portions of the second and third mounting tables are respectively rubber-like elastic bodies. A weight measuring device which is easily connected to the object to be measured and is relatively thin according to the length of the object to be measured, wherein the weight measuring device is elastically connected via an attachment including a part thereof. 2. A receiving portion is provided at an end of the second and third mounting tables opposite to the end provided with the mating portion, and at least one of the mounting tables has the second and third units and The weight measuring device according to claim 1, wherein one or two or more enlarged units having the same configuration are elastically connected. 3. The weight measuring device according to claim 1, wherein the attachment is formed by two metal plates and a rubber-like elastic body interposed therebetween.