JP2014071064A - Metering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metering device capable of preventing float-up of a pedestal while suppressing the increase in cost.SOLUTION: The metering device 100 includes a pedestal 110 on which a vehicle 10 (measuring object) is mounted, and load cells (first load cell 120, second load cell 130, third load cell 140, and fourth load cell 150) that support the pedestal 110 at four (at least three) fulcrums (fulcrum P1, fulcrum P2, fulcrum P3, and fulcrum P4) and measure a load charged from the pedestal 110. The metering device 100 measures the weight of the vehicle 10 mounted on the pedestal 110. In the view from the gravity direction, the vehicle 10 is mounted only in a mountable region T (region) surrounded by straight lines interconnecting the fulcrums of the load cells of the pedestal 110.

Description

  The present invention comprises a platform on which an object to be weighed is placed, and a load cell that supports the above-mentioned table and measures a load received from the platform, and the weight of the object to be weighed placed on the above-mentioned table TECHNICAL FIELD OF THE INVENTION

  2. Description of the Related Art Conventionally, the apparatus includes a mounting table on which an object to be weighed is placed, and a load cell that supports the above described table and measures a load received from the mounting table, and measures the weight of the object to be weighed placed on the above described table. The technology of the weighing device is well known. FIG. 17 shows a weighing device 900 which is an example of a conventionally known weighing device.

  A weighing apparatus 900 shown in FIG. 17 includes a substantially plate-shaped mounting table 910 on which wheels 11 of an object to be weighed (a vehicle in FIG. 17) are mounted, a first load cell 920 that supports the mounting table 910, and a second load cell 920. A load cell 930, a third load cell 940, and a fourth load cell 950 are provided.

  In the weighing apparatus 900, the mounting table 910 is supported from below by a first load cell 920, a second load cell 930, a third load cell 940, and a fourth load cell 950 (hereinafter simply referred to as each load cell). Each load cell is arranged in the vicinity of the four vertices of the mounting base 910 formed in a substantially rectangular shape in plan view (FIG. 17A).

  In the weighing apparatus 900 configured as described above, the weight of the object to be weighed can be measured by placing the object to be weighed on the table 910 and measuring the load that each load cell receives from the table 910 in that state. it can.

  Here, problems that may occur when an object to be weighed is placed on the platform 910 will be described.

As shown in FIG. 17, when each load cell is arranged under the mounting base 910, the mounting base 910 supports the mounting base 910 by contacting the supporting point of each adjacent load cell in plan view (each load cell contacts the mounting base 910). Are in a state of protruding beyond the straight line (so-called overhanging state).
For example, in FIG. 17, the mounting table 910 is a straight line connecting the fulcrums of the second load cell 930 and the fourth load cell 950 respectively arranged in the vicinity of the two apexes on the rear side of the mounting table 910 (dotted line in the figure). It is in a state of protruding beyond (overhanging state).

  When an object to be weighed (for example, a vehicle wheel 11) is to be placed on the platform 910 in such a state from behind, a load from the wheel 11 is applied to the above-described overhanging portion of the platform 910 (see FIG. 17 (b) downward arrow). Then, the mounting table 910 rotates around the fulcrum of the second load cell 930 and the fourth load cell 950, and the front end of the mounting table 910 tends to rise. When the mounting table 910 is lifted, there is a possibility that the measuring device 900 may be broken or the weight may be poorly measured.

  Therefore, Patent Document 1 discloses a weighing device capable of fixing a load cell and a mounting table. By fixing the load cell and the platform, it is possible to prevent the platform from being lifted as described above.

  In addition to fixing the load cell and the mounting base, the lifting can be prevented by significantly increasing the weight of the mounting base to the extent that the above-mentioned lifting does not occur.

  However, as described above, in order to fix the load cell and the mounting base, additional parts, processing, and work for fixing are required, and in order to significantly increase the weight of the mounting base, the corresponding material is required. Therefore, both methods are disadvantageous in that they are expensive.

JP-A-10-132671

  The present invention has been made in view of the situation as described above, and a problem to be solved is to provide a weighing device capable of preventing an increase in cost while suppressing an increase in cost. .

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect of the present invention, there is provided a loading table on which the object to be weighed is placed, and a load cell that supports the loading table at at least three fulcrums and measures a load received from the loading table. A weighing device for measuring the weight of an object to be weighed, wherein the object to be weighed is only in a region surrounded by a straight line connecting the fulcrums of the load cells to each other as viewed from the direction of gravity. It is configured to be placed.

  In Claim 2, the above-mentioned stand is a part located in the above-mentioned area when viewed from the direction of gravity, and a mounting part on which the object to be weighed can be placed, and the above-described base when viewed from the direction of gravity. Including a portion other than the portion, and a non-mounting portion on which the object to be weighed cannot be placed.

  In claim 3, the weighing device is disposed in a pit provided on the ground, and the placement unit is formed so that a placement surface on which the object to be weighed is placed is at the same height as the ground. The non-mounting portion is formed so as to be positioned at a position lower than the ground, and is covered from above by a detachable lid member supported by the ground.

  According to the present invention, since the area on which the object is placed cannot be in a so-called overhanging state, it is possible to prevent the platform from floating. Moreover, since there is no need to fix the mounting base or increase the weight, there is an effect that an increase in cost for preventing the lifting can be suppressed.

The perspective view which showed the whole measuring apparatus which concerns on 1st embodiment of this invention. Similarly, a plan view. Similarly, an enlarged plan view. FIG. 4 is a partial cross-sectional view taken along line AA in FIG. 3. BB partial sectional view in FIG. The plane schematic diagram of a measuring device. Similarly, a schematic side view. (A) The plane schematic diagram which showed the measuring device which concerns on 2nd embodiment. (B) Similarly, a schematic front view. (A) The plane schematic diagram which showed the measuring device which concerns on 3rd embodiment. (B) The front schematic diagram which showed the measuring device which concerns on 4th embodiment. The perspective view which showed the measuring device which concerns on 5th embodiment. (A) Similarly, a top view. (B) Similarly, a side view. (A) The top view which showed the modification of the measuring apparatus which concerns on 5th embodiment. (B) Similarly, a side view. The perspective view which showed the measuring device which concerns on 6th embodiment. (A) Similarly, a top view. (B) Similarly, a side view. (A) The perspective view which showed the measuring device which concerns on 7th embodiment. (B) Similarly, a plan view. (C) Similarly, a side view. (A) The perspective view which showed the modification of the measuring apparatus which concerns on 7th embodiment. (B) Similarly, a plan view. (C) Similarly, a side view. (A) The plane schematic diagram which showed the conventional measuring device. (B) Similarly, a schematic side view.

  Hereinafter, the front-rear direction, the up-down direction, and the left-right direction are defined according to the arrows shown in the drawing.

  First, the configuration of the weighing device 100 according to the first embodiment of the weighing device according to the present invention will be described with reference to FIGS.

  The weighing device 100 measures the weight of an object to be weighed. The weighing device 100 according to the present embodiment is a so-called truck scale that can measure the weight of the vehicle 10 such as a truck. More specifically, the weighing device 100 is a so-called pit type weighing device that is disposed in a hole (pit 20) formed in the ground 30 (see FIGS. 4 and 5), and each wheel of the vehicle 10. This is a so-called wheel scale capable of measuring the weights at 11.11. As shown in FIGS. 1 and 2, two weighing devices 100 are arranged side by side on the left and right, and can measure the weight of each of the left and right wheels 11, 11 of the vehicle 10.

  In addition, since the configuration of the right and left weighing devices 100 and 100 is bilaterally symmetrical, the configuration of the weighing device 100 arranged on the right side will be described below, and the description of the weighing device 100 arranged on the left side will be omitted. .

  The weighing device 100 mainly includes a mounting table 110, a first load cell 120, a second load cell 130, a third load cell 140, a fourth load cell 150, a central lid member 160, and a right lid member 170.

  3 to FIG. 5 is a platform on which a vehicle 10 (more specifically, a wheel 11 of the vehicle 10), which is an object to be weighed, is placed. The mounting table 110 mainly includes a mounting unit 111, a left non-mounting unit 112, and a right non-mounting unit 113.

  The placement unit 111 is a part on which the vehicle 10 (more specifically, the wheel 11 of the vehicle 10) that is an object to be weighed can be directly placed. The placement unit 111 is configured by a substantially rectangular plate-shaped member. The placement unit 111 is disposed with its plate surface directed in the direction of gravity (vertical direction) and the longitudinal direction directed in the horizontal direction. Both left and right end portions of the mounting portion 111 are bent downward. The placement unit 111 is disposed so that the placement surface (that is, the upper surface) on which the wheel 11 is placed is at the same height as the ground 30.

  Three reinforcing members 111a, 111a,... For reinforcement are fixed to the lower surface of the mounting portion 111. The reinforcing members 111a, 111a,... Are made of I-shaped steel. The reinforcing members 111a, 111a,... Are arranged at predetermined intervals in the front-rear direction and arranged so as to extend from the vicinity of the left end portion of the mounting portion 111 to the vicinity of the right end portion with the longitudinal direction thereof directed to the left and right. Is done.

  The left non-mounting portion 112 shown in FIGS. 3 and 4 is a portion that supports the left end portion of the mounting portion 111 from below. The left non-mounting portion 112 is configured by a substantially rectangular plate member. The left non-mounting portion 112 is arranged with its plate surface facing in the direction of gravity (vertical direction) and the longitudinal direction in the front-rear direction. The length of the left non-mounting portion 112 in the longitudinal direction (front-rear direction) is formed to be longer than the length of the mounting portion 111 in the front-rear direction. The right end portion of the left non-mounting portion 112 is bent downward. The left non-mounting portion 112 is disposed below the left end portion of the placement portion 111 so that the right end portion thereof overlaps with the left end portion of the placement portion 111 in plan view (FIG. 3). The left end of the mounting portion 111 is fixed to the upper surface of the left non-mounting portion 112, and the left ends of the reinforcing members 111a, 111a,.

  The right non-mounting portion 113 shown in FIGS. 3 to 5 is a portion that supports the right end portion of the placing portion 111 from below. The right non-mounting portion 113 is configured by a substantially rectangular plate member. The right non-mounting portion 113 is arranged with its plate surface facing in the direction of gravity (vertical direction) and the longitudinal direction in the front-rear direction. The length in the longitudinal direction (front-rear direction) of the right non-mounting portion 113 is formed to be longer than the length in the front-rear direction of the placement portion 111. The left end portion of the right non-mounting portion 113 is bent downward. The right non-mounting portion 113 is disposed below the right end portion of the placement portion 111 so that the left end portion thereof overlaps with the right end portion of the placement portion 111 in plan view (FIG. 3). The right end of the mounting portion 111 is fixed to the upper surface of the right non-mounting portion 113, and the right ends of the reinforcing members 111a, 111a,.

  The first load cell 120, the second load cell 130, the third load cell 140, and the fourth load cell 150 support the mounting table 110 and measure a load received from the mounting table 110. The first load cell 120, the second load cell 130, the third load cell 140, and the fourth load cell 150 are so-called compression type load cells.

  The first load cell 120 is disposed below the vicinity of the front end portion of the left non-mounting portion 112 so as to overlap with the vicinity of the front end portion of the left non-mounting portion 112 in plan view (FIG. 3). The upper end of the first load cell 120 is fixed to the left non-mounting portion 112. The lower end of the first load cell 120 is fixed to the upper surface of the mounting base 121 fixed in the pit 20 and is supported at a predetermined height by the mounting base 121.

  The second load cell 130 is arranged below the vicinity of the rear end portion of the left non-mounting portion 112 so as to overlap with the vicinity of the rear end portion of the left non-mounting portion 112 in plan view (FIG. 3). The upper end of the second load cell 130 is fixed to the left non-mounting portion 112. The lower end of the second load cell 130 is fixed to the upper surface of the mounting base 131 fixed in the pit 20 and is supported at a predetermined height by the mounting base 131.

  The third load cell 140 is disposed below the vicinity of the front end portion of the right non-mounting portion 113 so as to overlap with the vicinity of the front end portion of the right non-mounting portion 113 in plan view (FIG. 3). The upper end of the third load cell 140 is fixed to the right non-mounting portion 113. The lower end of the third load cell 140 is fixed to the upper surface of the mounting base 141 fixed in the pit 20 and is supported at a predetermined height by the mounting base 141.

  The fourth load cell 150 is disposed below the vicinity of the rear end portion of the right non-mounting portion 113 so as to overlap with the vicinity of the rear end portion of the right non-mounting portion 113 in plan view (FIG. 3). The upper end of the fourth load cell 150 is fixed to the right non-mounting portion 113. The lower end of the fourth load cell 150 is fixed to the upper surface of the mounting base 151 fixed in the pit 20 and is supported at a predetermined height by the mounting base 151.

  As described above, the left non-mounting portion 112 and the right non-mounting portion 113 are supported by the load cells (the first load cell 120, the second load cell 130, the third load cell 140, and the fourth load cell 150), and as a result, the entire mount 110 Will be supported. At this time, each mounting base (the mounting base 121, the mounting base 131, the mounting base 141, and the mounting base 151) so that the mounting surface (upper surface) of the mounting portion 111 of the mounting base 110 is at the same height as the ground 30. The height of each load cell is adjusted by.

  Further, by measuring the load that each load cell receives from the mounting table 110, the weight of the object to be weighed mounted on the mounting table 110 can be measured. Information about the weight of the object to be weighed measured by each load cell is transmitted to a control device and a display device (not shown) so that the operator (measurer of the object to be weighed) can confirm the information.

  The central lid member 160 shown in FIGS. 2 to 4 closes the opening (hole) of the pit 20. The central lid member 160 is formed of a substantially H-shaped plate material. The central lid member 160 is disposed with its plate surface directed in the direction of gravity (vertical direction). The central lid member 160 is disposed on the left side of the placement unit 111 such that the upper surface thereof is the same height as the ground 30. The central lid member 160 is supported from below by a support piece (not shown) fixed in the vicinity of the upper end portion of the inner side surface of the pit 20 and can be attached to and detached from the pit 20. At this time, the central lid member 160 covers the opening of the pit 20 (specifically, the opening on the left side of the placement unit 111 but not covered by the placement unit 111). Placed in. The left non-mounting portion 112 is covered from above by the central lid member 160.

  The central lid member 160 is disposed so as to simultaneously close the right opening of the placement portion 111 of the weighing device 100 (see FIG. 2) disposed on the left side, which is not described. That is, the central lid member 160 is shared by the left and right weighing devices 100 and 100.

  The right lid member 170 shown in FIGS. 2 to 5 closes the opening (hole) of the pit 20. The right lid member 170 is formed of a substantially rectangular plate material. The right lid member 170 is arranged with its plate surface directed in the direction of gravity (vertical direction). The right lid member 170 is disposed on the right side of the placement unit 111 such that the upper surface thereof is at the same height as the ground 30. The right lid member 170 is supported from below by a support piece 21 fixed in the vicinity of the upper end portion of the inner side surface of the pit 20 and can be attached to and detached from the pit 20. At this time, the right lid member 170 covers the opening of the pit 20 (specifically, the opening on the right side of the mounting unit 111 and not covered by the mounting unit 111). Placed in. The right non-mounting portion 113 is covered from above by the right lid member 170.

  Hereinafter, the positional relationship between each load cell and the mount 110 in the weighing device 100 configured as described above will be described in detail with reference to FIGS. 6 and 7.

  6 and 7, for convenience of description, members unnecessary for description are omitted, and the weighing device 100 is illustrated using schematic diagrams in which the shape of each member is simplified.

  As shown in FIG. 6, the first load cell 120, the second load cell 130, the third load cell 140, and the fourth load cell 150 support the mounting table 110 when viewed from the direction of gravity (vertical direction) (each load cell is The center point of the surface supporting the mounting 110) is defined as a fulcrum P1, a fulcrum P2, a fulcrum P3, and a fulcrum P4, respectively.

  In addition, as viewed from the direction of gravity (vertical direction), a region surrounded by a straight line connecting the fulcrums (fulcrum P1, fulcrum P2, fulcrum P3, and fulcrum P4) (the region indicated by the dashed line in FIG. 6). The mountable region T.

6 shows a straight line connecting the fulcrum P1 and the fulcrum P2, a straight line connecting the fulcrum P3 and the fulcrum P4, a straight line connecting the fulcrum P1 and the fulcrum P3, and a straight line connecting the fulcrum P2 and the fulcrum P4. The enclosed area is a mountable area T.
In addition to this, the straight lines connecting the fulcrums include a straight line connecting the fulcrum P1 and the fulcrum P4, and a straight line connecting the fulcrum P2 and the fulcrum P3. Since (shape) is not changed, the illustration is omitted.

  There is a possibility that the mounting table 110 may be lifted when a load is applied to a portion (so-called overhanging portion) of the mounting table 110 that protrudes outside the loadable region T in the gravity direction (vertical direction). Is added. In other words, when viewed from the gravity direction (vertical direction), even when a load is applied within the loadable region T (including the straight line connecting the fulcrums) of the mounting table 110, the mounting table 110 is not likely to be lifted. .

  Therefore, in the present embodiment, the mountable region T is viewed from the gravity direction (vertical direction) of the placement unit 111 on which the vehicle 10 (more specifically, the wheel 11 of the vehicle 10) that is the object to be weighed is directly placed. It is arranged to be located inside. Specifically, when viewed from the direction of gravity (vertical direction), the front end and the rear end of the mounting portion 111 are arranged so as to coincide with a straight line connecting the fulcrum P1 and the fulcrum P3 and a straight line connecting the fulcrum P2 and the fulcrum P4, respectively. ing. Further, the left end of the mounting portion 111 is located to the right of the straight line connecting the fulcrum P1 and the fulcrum P2 and the right end of the mounting portion 111 is located to the left of the straight line connecting the fulcrum P3 and the fulcrum P4 when viewed from the gravity direction (vertical direction). , Are arranged to be located respectively.

  On the other hand, when viewed from the gravitational direction (vertical direction), a portion other than the placement portion 111 (a portion not overlapping with the placement portion 111) of the placement table 110 is configured by the left non-placement portion 112 and the right non-placement portion 113. Has been. The left non-placing part 112 and the right non-placing part 113 are positioned below the mounting part 111, and the central lid member 160 and the right lid member 170 (parts overlapping the placing part 111 when viewed from the direction of gravity). Is covered from above by the mounting portion 111), so that the wheel 11 cannot be directly mounted on the left non-mounting portion 112 and the right non-mounting portion 113 (FIG. 7). reference).

  Below, the state at the time of measuring the weight of the vehicle 10 which is a to-be-measured object using the weighing | measuring apparatus 100 comprised as mentioned above is demonstrated using FIG.1, FIG.6 and FIG.7.

  As shown in FIG. 1, when measuring the weight of the vehicle 10 (more specifically, the weight applied to the pair of left and right wheels 11, 11 of the vehicle 10), the vehicle 10 is advanced from the rear of the weighing devices 100, 100. The left and right wheels 11 and 11 of the vehicle 10 are respectively placed on the weighing devices 100 and 100 arranged on the left and right.

  As shown in FIGS. 6 and 7, if the wheel 11 is located at the left and right central portion of the weighing device 100, the wheel 11 is placed on the placement portion 111 of the platform 110 from the rear. When the wheel 11 is placed on the placement unit 111, a load applied by the wheel 11 is applied to the placement unit 111 (see a downward arrow in FIG. 7).

  Here, the mounting portion 111 on which the wheel 11 is placed is located in the mountable region T when viewed from the direction of gravity (vertical direction). For this reason, even if the load by the wheel 11 is added to the said mounting part 111, the mounting base 110 does not float up.

  Thus, the weight applied to the wheel 11 placed on the placement unit 111 is measured by each load cell, and information on the weight is transmitted to a control device, a display device, etc. (not shown) and can be confirmed by the operator. it can.

  Even if the wheel 11 cannot be placed on the left and right center portion of the weighing device 100 due to a driving error of the vehicle 10, the center lid member 160 and the right lid member 170 are disposed on the left and right sides of the placement portion 111. (See FIGS. 2 and 3), the wheel 11 does not fit into the pit 20, and the wheel 11 is not placed on the left non-placing portion 112 and the right non-placing portion 113.

  As described above, the weighing device 100 according to this embodiment includes the platform 110 on which the vehicle 10 (object to be weighed) is placed, and four (at least three) fulcrums (fulcrum P1, fulcrum P2, fulcrum P3, and fulcrum P4). ) And a load cell (first load cell 120, second load cell 130, third load cell 140, and fourth load cell 150) for measuring the load received from the mount 110. 110 is a weighing device 100 for measuring the weight of a vehicle 10 placed on 110, and is viewed in a gravitational direction in a loadable region T (region) surrounded by a straight line connecting the fulcrums of the load cells. Only the vehicle 10 is configured to be placed thereon.

  By configuring in this way, the mountable region T on which the vehicle 10 is placed cannot be in a so-called overhanged state, so that the platform 110 can be prevented from floating. Moreover, since it is not necessary to fix the mounting base 110 or increase the weight, it is possible to suppress an increase in cost for preventing the lifting.

  In the present embodiment, four load cells (first load cell 120, second load cell 130, third load cell 140, and fourth load cell 150) having one fulcrum are used, for a total of four fulcrum points (fulcrum P1, fulcrum P2). The fulcrum P3 and the fulcrum P4) are configured to support the mounting table 110, but the present invention is not limited to this. That is, it is sufficient that there are three or more fulcrums that support the mounting table 110. For example, a configuration in which the mounting table 110 is supported by one load cell having three or more supporting points is also possible.

  Further, the mounting table 110 is a portion located in the loadable region T when viewed from the direction of gravity, and includes a mounting unit 111 on which the vehicle 10 can be mounted and other than the mounting unit 111 when viewed from the direction of gravity. And a non-mounting part (left non-placing part 112 and right non-placing part 113) on which the vehicle 10 cannot be placed.

  With this configuration, the mounting unit 111 on which the vehicle 10 (wheel 11) can be placed is always included in the mountable region T. Therefore, when the weight of the vehicle 10 is measured, It can be prevented from floating.

  In this case, each load cell supports a portion of the non-mounting portion (the left non-mounting portion 112 and the right non-mounting portion 113) that does not overlap with the mounting portion 111 when viewed from the direction of gravity.

  The non-mounting parts (the left non-placing part 112 and the right non-placing part 113) may partially overlap the mounting part 111 when viewed from the direction of gravity.

  Further, the placing unit 111 and the non-placing unit (the left non-placing unit 112 and the right non-placing unit 113) can be configured integrally with one member.

  Further, the mounting table 110 is configured to have a substantially rectangular shape in plan view (see FIG. 3 and the like), but the present invention is not limited to this, and the shape of the mounting table 110 is not limited. Absent.

  The weighing device 100 is disposed in the pit 20 provided on the ground 30, and the placement unit 111 is formed so that the placement surface (upper surface) on which the vehicle 10 is placed is the same height as the ground 30. The non-mounting portion is formed so as to be positioned at a position lower than the ground 30 and is covered from above by removable lid members (the central lid member 160 and the right lid member 170) supported by the ground 30. It is.

  With this configuration, a slope or the like for placing the vehicle 10 on the placement unit 111 is not necessary, and the installation range of the weighing device 100 can be made compact. Further, in this case, by removing the lid members (the central lid member 160 and the right lid member 170) from the pit 20, the installation work and maintenance of the weighing device 100 can be easily performed.

  Further, like the weighing device 100 according to the present embodiment, each load cell (the first load cell 120, the second load cell 130, the third load cell 140, and the fourth load cell 150) is not placed on the non-placed portion (the left non-placed portion 112 and the right side). By disposing under the non-mounting portion so as to overlap with the non-mounting portion 113), the gap between the mounting portion 111, the central lid member 160 and the right lid member 170 closing the opening of the pit 20. It is possible to prevent rainwater and dust entering the pit 20 from directly attaching to each load cell. As a result, it is possible to suppress contamination of each load cell, deterioration of material, and occurrence of defects.

  In addition, in order to prevent rainwater and dust from entering the pit 20 from the gaps between the mounting portion 111, the central lid member 160, and the right lid member 170 blocking the opening of the pit 20, the gaps are sealed. It is also possible to interpose a member.

  Hereinafter, other embodiments of the weighing device according to the present invention will be described.

  First, the weighing device 200 according to the second embodiment will be described with reference to FIG.

  The weighing device 200 according to the second embodiment is different from the weighing device 100 according to the first embodiment in that the weighing device 200 includes a non-mounting portion 212 instead of the left non-loading portion 112 and the right non-loading portion 113. In addition, a fifth load cell 280 and a sixth load cell 290 are newly provided. Therefore, only the difference will be described below.

  The non-mounting unit 212 is a part that supports the mounting unit 111 from below. The non-mounting unit 212 is configured by a substantially rectangular plate-like member that is slightly larger than the mounting unit 111 when viewed from the direction of gravity (vertical direction). As described above, the non-mounting unit 212 does not support the mounting unit 111 from both the left and right sides (see the weighing device 100 according to the first embodiment), but supports the entire mounting unit 111 from below. It is also possible to configure.

  The fifth load cell 280 is disposed below the non-mounting portion 212 so as to overlap the left and right substantially central portion of the front end portion of the non-mounting portion 212 in plan view (FIG. 8A). The fifth load cell 280 is disposed approximately in the middle between the first load cell 120 and the third load cell 140 in plan view. The fifth load cell 280 supports the non-mounting portion 212 from below.

  The sixth load cell 290 is disposed below the non-mounting portion 212 so as to overlap the left and right substantially central portion of the rear end portion of the non-mounting portion 212 in plan view (FIG. 8A). The sixth load cell 290 is disposed approximately in the middle between the second load cell 130 and the fourth load cell 150 in plan view. The sixth load cell 290 supports the non-mounting portion 212 from below.

  Thus, the number of load cells is not limited to four (see the weighing device 100 according to the first embodiment), and six load cells may be provided. Furthermore, in order to achieve the effect of the present invention, it is only necessary to form a region (mountable region T) surrounded by a straight line connecting the fulcrums of the load cell as viewed from the direction of gravity (vertical direction). It is sufficient that the load cells are arranged without being aligned.

  Next, the weighing device 300 according to the third embodiment will be described with reference to FIG.

  The weighing device 300 according to the third embodiment is different from the weighing device 100 according to the first embodiment in that each load cell in the plan view (first load cell 120, second load cell 130, third load cell 140, and fourth load cell 150). And the mounting table 110. Therefore, only the difference will be described below.

  In the weighing device 300 according to the third embodiment, the loading unit 111 of the loading table 110 on which the vehicle 10 (more specifically, the wheel 11 of the vehicle 10) that is an object to be weighed is directly placed in the direction of gravity (vertical direction). Is disposed so as to be completely included in the mountable region T as viewed from the perspective. Specifically, when viewed from the direction of gravity (vertical direction), the front end of the mounting portion 111 is behind a straight line connecting the fulcrum P1 and the fulcrum P3, and the rear end of the mounting portion 111 is a straight line connecting the fulcrum P2 and the fulcrum P4. The left end of the mounting portion 111 is positioned to the right of the straight line connecting the fulcrum P1 and the fulcrum P2, and the right end of the mounting portion 111 is positioned to the left of the straight line connecting the fulcrum P3 and the fulcrum P4. ing.

  As described above, the placement unit 111 only needs to be located in the mountable region T when viewed from the direction of gravity (vertical direction). In addition to this, it is also possible to form the mounting portion 111 so as to have the same shape as the mountable region T when viewed from the direction of gravity (vertical direction), and to arrange it so as to completely overlap the mountable region T. It is.

  Next, the weighing device 400 according to the fourth embodiment will be described with reference to FIG.

  The difference between the weighing device 400 according to the fourth embodiment and the weighing device 100 according to the first embodiment is that the left non-loading portion 412 and the right non-loading portion 113 are replaced with the left non-loading portion 112 and the right non-loading portion 113. It is the point which comprises the mounting part 413. FIG. Therefore, only the difference will be described below.

  The configuration of the left non-mounting portion 412 is substantially the same as that of the left non-mounting portion 112 according to the first embodiment, and is configured to support the left end portion of the mounting portion 111 from below. Unlike the left non-mounting portion 112 according to the first embodiment, the left non-loading portion 412 is downwardly directed from the portion (fulcrum) supported by the first load cell 120 and the second load cell 130 toward the left end portion. It is formed so as to be inclined.

  The configuration of the right non-mounting portion 413 is substantially the same as that of the right non-mounting portion 113 according to the first embodiment, and is configured to support the right end portion of the mounting portion 111 from below. Unlike the right non-mounting portion 113 according to the first embodiment, the right non-mounting portion 413 is downward from the portion (fulcrum) supported by the third load cell 140 and the fourth load cell 150 toward the right end portion. It is formed so as to be inclined.

  By configuring in this way, rainwater and dust that enter the pit 20 through the gap between the mounting portion 111 and the central lid member 160 and the right lid member 170 are left-side non-mounting portion 412 and right-side non-mounting portion. The top surface of 413 can be traced down to the bottom of the pit 20, and dust can be made difficult to accumulate on the top surfaces of the left non-mounting portion 412 and right non-mounting portion 413.

  Next, a weighing device 500 according to the fifth embodiment will be described with reference to FIGS. 10 and 11.

  The weighing device 500 measures the weight of an object to be weighed. The weighing device 500 according to the present embodiment is a so-called truck scale that can measure the weight of the vehicle 10 such as a truck. More specifically, the weighing device 500 is a so-called pitless guard type weighing device that does not need to dig a pit deep into the ground and includes a guard for guiding the vehicle 10.

  The weighing device 500 mainly includes a mounting table 510, a first load cell 520, a second load cell 530, a third load cell 540, a fourth load cell 550, a front slope 560, and a rear slope 570.

  The mounting table 510 is for mounting the vehicle 10 (more specifically, the wheel 11 of the vehicle 10) as an object to be weighed. The mounting table 510 mainly includes a mounting unit 511 and a non-mounting unit 512.

  The placement portion 511 is a portion on which the vehicle 10 (more specifically, the wheel 11 of the vehicle 10) that is an object to be weighed can be directly placed. The placement portion 511 is configured by a substantially rectangular plate-shaped member. The mounting portion 511 is disposed with its plate surface facing in the direction of gravity (vertical direction) and the longitudinal direction in the front-rear direction. The placement portion 511 is disposed such that the placement surface (that is, the upper surface) on which the wheel 11 is placed is higher than the ground 30.

  Guards 511a and 511a for guiding the vehicle 10 (wheels 11) are provided on the upper surface of the mounting portion 511. The guards 511a and 511a are substantially rectangular plate-like members, and are erected upward from the left and right end portions of the mounting portion 511 with the longitudinal direction thereof in the front-rear direction.

  The non-mounting part 512 is a part that supports the mounting part 511 from below. The non-mounting part 512 is configured by a substantially rectangular member that is slightly larger than the mounting part 511 when viewed from the direction of gravity (vertical direction). The non-mounting portion 512 is arranged such that its outer peripheral end protrudes outside the outer peripheral end of the mounting portion 511 when viewed from the direction of gravity (vertical direction).

  The first load cell 520, the second load cell 530, the third load cell 540, and the fourth load cell 550 support the mounting table 510 and measure a load received from the mounting table 510. The first load cell 520, the second load cell 530, the third load cell 540, and the fourth load cell 550 are so-called compression type load cells. The first load cell 520, the second load cell 530, the third load cell 540, and the fourth load cell 550 are below the apex of the non-mounting portion 512, and are placed on the placement portion 511 when viewed from the direction of gravity (vertical direction). It is arranged at a position that does not overlap.

  The front slope 560 and the rear slope 570 are for easily placing the vehicle 10 on the mounting table 510. The front slope 560 and the rear slope 570 are respectively arranged on the front and back of the mounting portion 511 of the mounting table 510, and the vehicle 10 is moved from the ground to the mounting portion 511 by an inclined surface (upper surface) inclined at a predetermined angle (or Guidance from the mounting portion 511 to the ground).

  As described above, the weighing device according to the present invention is also applicable to the so-called pitless guard type weighing device 500 according to the fifth embodiment. In this case, the mounting portion 511 on which the vehicle 10 is placed is viewed from the gravity direction (vertical direction) (see FIG. 11A), and the fulcrum of each load cell that supports the mounting base 510 (see the black dots in FIG. 11A). Since the vehicle 10 is placed on the mounting table 510 (mounting unit 511), the mounting table 510 does not float.

  In addition, in the mounting base 510 which concerns on this embodiment, as shown in FIG. 12, it can also be set as the structure which arrange | positions each load cell under guard 511a * 511a.

  In this case, the placement portion 511 is disposed so as to be located in a region surrounded by a straight line connecting the fulcrums of the load cells (see the black dots in FIG. 12A). Specifically, the guards 511a and 511a extend so as to protrude in front of and behind the mounting portion 511, and each load cell is disposed below the protruding portion.

  In this case, a portion obtained by adding the guards 511a and 511a to the non-mounting portion 512 is an embodiment of the non-mounting portion according to the present invention.

  By comprising in this way, the left-right width of the weighing | measuring device 500 can be comprised compactly.

  Next, a weighing device 600 according to the sixth embodiment will be described with reference to FIGS. 13 and 14.

  The weighing device 600 measures the weight of an object to be weighed. The weighing device 600 according to the present embodiment is a so-called freight car scale that is arranged in a pit formed in the middle of a track and can measure the weight of a freight car that runs on the rail.

  The weighing device 600 mainly includes a mounting table 610, a first load cell 620, a second load cell 630, a third load cell 640, and a fourth load cell 650.

  The platform 610 is a platform on which a freight car (more specifically, a wheel of a freight car) that is an object to be weighed is placed. The mounting base 610 mainly includes a mounting portion 611, a front non-mounting portion 612, and a rear non-mounting portion 613.

  The placement portion 611 is a portion on which a freight car (more specifically, a wheel of a freight car) that is an object to be weighed can be directly placed. The placement portion 611 is configured by a substantially rectangular plate member. The placement portion 611 is disposed with its plate surface directed in the direction of gravity (vertical direction) and the longitudinal direction directed in the front-rear direction. The placement portion 611 is disposed so that the placement surface (that is, the upper surface) on which the wheel is placed is at the same height as the track.

  A pair of left and right detection rails 611 a and 611 a for guiding a freight car (wheel) is provided on the upper surface of the mounting portion 611. The detection rails 611a and 611a are arranged to be a part of the rails 40 and 40 of the track on which the weighing device 600 is arranged.

  A front non-mounting portion 612 and a rear non-mounting portion 613 shown in FIG. 14 are portions that support the mounting portion 611 from below. The front non-mounting portion 612 and the rear non-mounting portion 613 are configured by a substantially rectangular plate member. The front non-mounting portion 612 and the rear non-mounting portion 613 are arranged with their plate surfaces facing in the direction of gravity (vertical direction) and the longitudinal direction in the horizontal direction. The longitudinal direction (left and right direction) lengths of the front non-mounting part 612 and the rear non-mounting part 613 are formed to be longer than the horizontal length of the mounting part 611. The front non-mounting portion 612 and the rear non-mounting portion 613 are arranged so that a part of the front non-mounting portion 612 and the rear non-mounting portion 613 overlap the mounting portion 611 in plan view (FIG. 14A). It is each arrange | positioned under the edge part.

  The first load cell 620, the second load cell 630, the third load cell 640, and the fourth load cell 650 support the mounting table 610 and measure the load received from the mounting table 610. The first load cell 620, the second load cell 630, the third load cell 640, and the fourth load cell 650 are so-called compression type load cells. The first load cell 620 is below the vicinity of the left end of the front non-mounting portion 612, the second load cell 630 is below the left end of the rear non-mounting portion 613, and the third load cell 640 is below the front non-mounting portion 612. The fourth load cell 650 is disposed below the right end portion of the rear non-mounting portion 613 and below the right end portion. At this time, the placement unit 611 on which the freight car is placed looks at the fulcrum of each load cell (see the black dots in FIG. 14A) that supports the platform 610 when viewed from the direction of gravity (vertical direction) (see FIG. 14A). Each load cell is arranged so as to be located in an area surrounded by straight lines connecting to each other.

  As described above, the weighing device according to the present invention is also applicable to the so-called freight car scale according to the sixth embodiment. In this case, the mounting portion 611 on which the freight car is placed is in a region surrounded by a straight line connecting the fulcrums of the load cells that support the mounting base 610 when viewed from the direction of gravity (vertical direction) (see FIG. 14A). Since it arrange | positions so that it may be located, when the freight car is mounted on the mounting base 610 (mounting part 611), the said mounting base 610 does not float up.

  Next, a weighing device 700 according to the seventh embodiment will be described with reference to FIGS. 15 and 16.

  The weighing device 700 measures the weight of an object to be weighed. The weighing device 700 according to the present embodiment is a so-called platform scale that includes a relatively small table (a platform 710 described later) and can measure the weight of a relatively small object to be weighed.

  The weighing device 700 mainly includes a mounting table 710, a first load cell 720, a second load cell 730, a third load cell 740, and a fourth load cell 750.

  The platform 710 is for placing an object to be weighed. The mounting table 710 mainly includes a mounting unit 711 and a non-mounting unit 712.

  The mounting table 710 is configured by a substantially rectangular plate member. A frame-shaped non-mounting portion 712 formed so as to protrude upward is formed on the outer peripheral end portion of the mounting table 710. In the mounting table 710, a flat plate portion surrounded by the non-mounting unit 712 is formed as the mounting unit 711. That is, the placement part 711 and the non-placement part 712 are integrally formed. The non-mounting portion 712 is configured to be narrow so that the object to be weighed cannot be placed thereon. Further, the non-mounting portion 712 can prevent the object to be weighed placed on the placing portion 711 from dropping.

  The first load cell 720, the second load cell 730, the third load cell 740, and the fourth load cell 750 support the mounting table 710 and measure the load received from the mounting table 710. The first load cell 720, the second load cell 730, the third load cell 740, and the fourth load cell 750 are so-called compression type load cells. The first load cell 720, the second load cell 730, the third load cell 740, and the fourth load cell 750 are respectively disposed below the apexes of the non-mounting portion 712. At this time, the placement unit 711 on which the object to be weighed is viewed from the direction of gravity (vertical direction) (see FIG. 15B) (see the black dots in FIG. 15B) of each load cell that supports the platform 710. ) Are arranged in a region surrounded by straight lines connecting each other).

  As described above, the weighing device according to the present invention is also applicable to the so-called platform scale according to the seventh embodiment. In this case, the mounting portion 711 on which the object to be weighed is placed is an area surrounded by a straight line connecting the fulcrums of the load cells that support the mounting base 710 when viewed from the direction of gravity (vertical direction) (see FIG. 15B). Since the objects to be weighed are placed on the mounting table 710 (the mounting unit 711), the mounting table 710 does not float.

  In addition, it is also possible to comprise the mounting base 710a of the weighing device 700 as shown in FIG. Specifically, the outer peripheral end portion of the mounting base 710a is recessed below the central portion, and the portion (outer peripheral end portion) is defined as a non-mounting portion 712a. Moreover, the part (part higher than the non-mounting part 712a) enclosed by the non-mounting part 712a among the mounting bases 710a is set as the mounting part 711a. The non-mounting portion 712a is configured to be narrow so that the object to be weighed cannot be placed thereon.

  Also in this case, the placement portion 711a on which the object to be weighed is placed is surrounded by a straight line connecting the fulcrums of the load cells that support the placement table 710a when viewed from the direction of gravity (vertical direction) (see FIG. 16B). Since the object to be weighed is placed on the mounting table 710a (the mounting part 711a), the mounting table 710a does not float.

  As shown in each of the above embodiments, the weighing device according to the present invention includes various weighing devices (not limited to the truck scale, the freight car scale and the platform scale shown in the above embodiment, but other weighing devices such as a conveyor scale). ).

The object to be weighed according to the present invention is not limited to the vehicle or the freight car shown in the above embodiment, and the weight can be measured using various objects as the object to be weighed.
The load cell according to the present invention is not limited to the so-called compression type load cell shown in the above embodiment, and a so-called tension type or bending type load cell can also be used.
In addition, as shown in the above embodiment, when using a so-called compression type load cell, the stage is supported from below, but when using the above-described so-called tension type or bending type load cell, It is also possible to support the platform by pulling it up from above.

DESCRIPTION OF SYMBOLS 100 Weighing device 110 Mounting base 111 Mounting part 112 Left non-mounting part 113 Right non-mounting part 120 1st load cell 130 2nd load cell 140 3rd load cell 150 4th load cell 160 Central lid member 170 Right side lid member

Claims (3)

A platform on which objects to be weighed are placed;
A load cell that supports the above-described table at at least three fulcrums and measures a load received from the table;
Comprising
A weighing device for measuring the weight of an object to be weighed placed on the table,
A weighing apparatus configured to allow the object to be weighed to be placed only in a region surrounded by a straight line connecting the fulcrums of the load cell to each other in the above-mentioned table as viewed from the direction of gravity. The table above is
A portion that is located in the region as seen from the direction of gravity and is capable of placing the object to be weighed; and
A portion other than the placement portion as seen from the direction of gravity, and a non-placement portion on which the object to be weighed cannot be placed;
The weighing device according to claim 1, comprising: The weighing device is arranged in a pit provided on the ground,
The placement section is
The mounting surface on which the object to be weighed is formed so as to be the same height as the ground,
The non-mounting portion is
It is formed so as to be located at a position lower than the ground, and is covered from above by a detachable lid member supported by the ground.
The weighing device according to claim 2.

Images