JP2007101463A - Weight-detecting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weight-detecting device capable of mounting a weighing sensor for detecting floor vibration, even when there is no margin in terms of space. <P>SOLUTION: In a weight checker 1, a plurality of conveyors 3ba-3bc are arranged in parallel to each other, in a direction orthogonal to a transfer direction A. Each of conveyors 3ba-3bc mounts a load cell 5 for weighing an object X to be weighed and an AFV 6 for detecting the influence due to vibration that the load cell 5 is being affected from a floor surface during weighing to eliminate the influence. The AFV 6 is housed in an internal space of a frame 20, extending in a direction orthogonal to the transfer direction A so as to strike over a plurality of conveyors 3ba-3bc arranged in parallel each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a weight detection apparatus including a detection sensor such as a load cell for vibration detection in order to remove the influence of vibration on a floor surface.

2. Description of the Related Art In recent years, in a weight detection device that performs weighing while transporting an object to be weighed, in order to eliminate the influence of vibration from the floor surface, There is provided an apparatus provided with a second weighing sensor (load cell) for detecting a vibration component.
For example, Patent Document 1 discloses a weight detection device in which a second weighing sensor for detecting floor vibrations is attached to the opposite side of the first weighing sensor in a column portion that is in contact with the floor surface. According to this, it becomes possible to improve the detection accuracy by removing the influence of vibration disturbance from the apparatus installation side and the article placement side.
JP 2004-309148 A (published November 4, 2003) JP 2002-039845 A (published February 6, 2002)

However, the conventional weight detection apparatus has the following problems.
That is, in the weight detection device disclosed in the above publication, the size of the object to be weighed is not particularly considered, but in actual weighing, for example, it is possible to measure a thin and small object such as a stick sugar. It is done. In general, 5 to 6 of such small objects to be weighed are discharged onto the conveyor at the same time when discharged from a packaging machine or the like arranged on the upstream side. Since it becomes very large, it is necessary to design the width of the conveyor and the size of the apparatus itself so that the weighing accuracy does not decrease.

However, in the weight detection device disclosed in the above publication, when the size of the device is limited or the width of the transfer conveyor is narrowed, a space for mounting the second weighing sensor for detecting floor vibration is secured. It may not be possible.
An object of the present invention is to provide a weight detection device capable of mounting a weighing sensor for detecting floor vibration even when there is no space.

  A weight detection apparatus according to a first aspect of the invention is a weight detection apparatus that performs weighing while conveying an object to be measured, and includes a plurality of weighing and conveying mechanisms arranged in parallel with each other and a support member. Each of the plurality of weighing and transporting mechanisms includes a transport conveyor for transporting the object to be weighed, a first weighing sensor for weighing the object to be weighed, and a first for removing the influence of floor vibration from the weighing result of the first weighing sensor. 2 weighing sensors. The support member has a space inside that extends in a direction substantially perpendicular to the conveyance direction of the object to be weighed across a plurality of measurement conveyance mechanisms arranged in parallel. The second weighing sensor is arranged in a space formed inside the support member.

  Here, a plurality of weighing and conveying mechanisms including a conveying conveyor for conveying an object to be weighed, a first weighing sensor for weighing an object to be weighed, and a second weighing sensor for detecting the influence of floor vibration in the first weighing sensor. In a so-called multiple type weight detection device arranged in parallel, a support member having an internal space extending in a direction substantially orthogonal to the conveyance direction of the object to be weighed across the plurality of measurement conveyance mechanisms arranged in parallel is provided. Yes. The second weighing sensor is arranged in the internal space of the support member.

Here, the first and second weighing sensors include a load cell that performs weighing by converting a distortion caused by the weight of an object to be weighed placed on the free end side into an electric signal.
Accordingly, the second weighing sensor is provided in the internal space of the support member extending in the direction orthogonal to the conveyance direction so as to connect the plurality of measurement conveyance mechanisms arranged in parallel to each other, and the longitudinal direction thereof is provided along the conveyance direction. Thereby, even if it is the structure where the length of the direction orthogonal to the conveyance direction in each weight detection apparatus is small, the space which arrange | positions a 2nd measurement sensor can be ensured reliably. As a result, even when the weight detection device is small in the direction orthogonal to the conveyance direction, it is possible to detect the influence of floor vibration and perform highly accurate weighing.

A weight detection apparatus according to a second invention is the weight detection apparatus according to the first invention, wherein at least one of the first weighing sensor and the second weighing sensor is relative to the conveyance direction of the object to be weighed by the conveyor. It arrange | positions so that a longitudinal direction may become parallel.
Here, the direction when the first and second weighing sensors are arranged is defined. Specifically, it is arranged so that the longitudinal direction of each weighing sensor is parallel to the transport direction.
As a result, even if the weight detection device has a small size in the direction orthogonal to the conveyance direction, the first and second weighing sensors can be arranged so as not to protrude from the device. Even when two detection sensors are provided, it is possible to cope with downsizing of the apparatus.

A weight detection device according to a third aspect of the present invention is the weight detection device according to the first or second aspect of the present invention, and the weighing and conveying mechanism is attached in the vicinity of the bent portion of the support member.
Here, the weighing and conveying mechanism is attached to a bent portion included in the support member.
As a result, the generally bent portion has increased rigidity, and therefore can be made less susceptible to floor vibration. Therefore, the measurement which reduced the influence of floor vibration can be implemented by attaching the 1st and 2nd measurement sensor to the part with large rigidity.

A weight detection device according to a fourth invention is the weight detection device according to any one of the first to third inventions, wherein the first weighing sensor and the second weighing sensor are for the same member. Each is attached.
Here, the first and second weighing sensors are attached to the same member.
As a result, the influence of the floor vibration is transmitted to the first and second weighing sensors in substantially the same state. As a result, the influence of floor vibration included in the detection result of the first weighing sensor can be accurately detected by the second weighing sensor, and highly accurate weighing can be performed.

A weight detection device according to a fifth aspect of the present invention is the weight detection device according to any one of the first to fourth aspects of the present invention, wherein the first weighing sensor and the second weighing sensor have their mounting positions in plan view. Are arranged so as to overlap in the conveying direction of the objects to be weighed.
Here, in plan view, the first and second weighing sensors are arranged so as to overlap in the transport direction.

  As a result, the influence of the vibration from the floor surface in the direction orthogonal to the transport direction is received in substantially the same state. Therefore, the influence of the floor vibration included in the measurement result in the first measurement sensor is accurately detected by the second measurement sensor. It is possible to carry out high-precision weighing by detecting in the above. As a result, the influence of floor vibration applied to the first weighing sensor can be appropriately removed based on the detection result of the second weighing sensor, so that highly accurate weighing can be performed.

A weight detection device according to a sixth aspect of the present invention is the weight detection device according to any one of the first to fifth aspects of the present invention, wherein the support member is opposed to the legs that are erected on the floor surface. Is fixed.
Here, the support member to which the second weighing sensor is attached to the internal space is fixed to the leg portion that supports the entire weight detection device.
Thereby, the influence of floor vibration can be appropriately detected by the second weighing sensor, and the influence of floor vibration can be excluded from the weighing result of the first weighing sensor arranged in the vicinity of the second weighing sensor. As a result, more accurate weighing can be performed.

  According to the weight detection device of the present invention, it is possible to reliably detect the influence of the floor vibration even when the weight detection device is small in the direction orthogonal to the transport direction by securing a space for arranging the second weighing sensor. Accurate weighing can be performed.

A weight checker (weight detection device) 1 according to an embodiment of the present invention will be described below with reference to FIGS.
Regarding the “front-rear” direction used in the following description, the upstream side in the transport direction A shown in FIG. 1 is the “rear” side, and the downstream side is the “front” side.
[Configuration of the entire weight checker 1]
As shown in FIG. 1, the weight checker 1 according to the present embodiment mainly includes a flat belt type conveyor device 3 and a load cell (weighing sensor, first weighing sensor) 5 (see FIG. 3), an AFV (Anti Floor Vibration) (second weighing sensor) 6 (see FIG. 3), which is a load cell for detecting the influence of vibration on the floor surface, a housing 7 for housing the load cell 5 and AFV 6, and a housing A pair of front and rear legs 10 and 11 for fixing the body 7 and a frame (support member) 20 (see FIG. 3) for housing the AFV 6 in the internal space are provided. Further, the weight checker 1 is arranged as the last device constituting the production line, and while being conveyed in the direction of the arrow A in the conveyor device 3, for example, an object to be weighed X supplied from a bag making and packaging machine (not shown). Then, after determining whether it is a non-defective product or a non-defective product, only the object to be weighed X determined to be non-defective is conveyed to a metal detector (not shown) disposed on the downstream side.

  As shown in FIG. 1, the conveyor apparatus 3 is provided with a first transport unit 3a, a second transport unit 3b, and a third transport unit 3c in order from the upstream side in the transport direction A of the object to be weighed X. As shown in FIG. 2, each of the first to third transport units 3a to 3c further includes three conveyors 3aa to 3ac, 3ba to 3bc, and 3ca to 3cc arranged in a direction orthogonal to the transport direction. It is configured to include. In each of the conveyors 3aa to 3cc, an endless conveyance belt as a conveyance belt is wound between a pair of front and rear rollers 13 and 15.

The roller 13 on the downstream side in the transport direction A is a driving roller to which a rotational driving force is transmitted by driving motors M1 and M2 (see FIG. 3) described later. On the other hand, the upstream roller 15 is a driven roller that rotates when the rotational driving force from the roller 13 that is a driving roller is transmitted through the conveying belt.
The first transport unit 3a is disposed on the most upstream side in the transport direction A, and receives an object to be weighed X sent from a bag making and packaging machine (not shown) disposed on the upstream side of the weight checker 1 in the transport direction. It conveys toward A and delivers the to-be-measured object X with respect to the 2nd conveyance part 3b.

The second transport unit 3b is disposed between the first transport unit 3a and the third transport unit 3c, and the weighing is performed using the load cell 5 and the AFV 6 while transporting the object X here. . The weighing of the object X in the second transport unit 3b will be described in detail later.
The 3rd conveyance part 3c is arrange | positioned at the most downstream side in the conveyance direction A, and as shown in FIG. 1, it rotates centering | focusing on the edge part of an upstream side. Thereby, the to-be-measured object X is distributed based on the measurement result in the 2nd conveyance part 3b. Specifically, when the measurement result in the second transport unit 3b is within a predetermined weight range, the third transport unit 3c is set to a substantially horizontal state indicated by a solid line in FIG. It is conveyed downstream as it is. On the other hand, when the measurement result in the second transport unit 3b is out of the predetermined weight range, the third transport unit 3c is rotated to the obliquely downward state shown by the dotted line in FIG. And the object to be weighed X (defective product) is conveyed.

As shown in FIG. 3, the drive motor M1 is provided for each of the three most upstream conveyors 3aa to 3ac, and is disposed below each of the conveyors 3aa to 3ac. The rollers of the conveyors 3aa to 3ac are provided. A rotational driving force is transmitted to 13 through a driving belt.
As shown in FIG. 4, the drive motor (heavy object, heat source) M2 is provided below the three conveyors 3ba to 3bc provided between the most upstream conveyors 3aa to 3ac and the most downstream conveyors 3ca to 3cc. It is arrange | positioned and rotational drive force is transmitted via a drive belt with respect to the roller 13 of each conveyor 3ba-3bc. The drive motor M2 serves as a heat source that releases heat when a rotational driving force is transmitted to the roller 13.

  As shown in FIGS. 1 and 3 and the like, the load cell 5 is disposed in the same casing 7 as the heavy drive motor M2 with the longitudinal direction thereof along the transport direction A. Further, as shown in FIG. 4, the load cell 5 is attached to a fixed end (adjustment mechanism, windbreak wall) 5b so as to be adjacent to the drive motor M2, and an arm member (connected to the free end 5c side) Weighing the object to be weighed X is detected by detecting a change in distortion caused by the object X being placed on the conveyors 3ba to 3bc via the connecting part) 21.

  The fixed end 5b and the free end 5c are located in the front-rear direction of the load cell 5, as shown in FIG. The fixed end 5b is formed of a material such as an aluminum alloy having high rigidity, light weight, and high thermal conductivity, and is connected to the pair of legs 10 and 11 through a plurality of parts (not shown). For this reason, even when the heat released from the drive motor M2 is transmitted to the fixed end 5b, the heat can be released through the legs 10 and 11. The fixed end 5b is arranged between the load cell 5 and the heavy drive motor M2, thereby preventing wind generated during the drive of the drive motor M2 from flowing into the load cell 5. Functions as a wind barrier. On the other hand, like the fixed end 5b, the free end 5c is formed of a material such as an aluminum alloy having high rigidity, light weight and high thermal conductivity, and is connected to the conveyors 3ba to 3bc via the arm member 21, respectively. Yes. For this reason, when the object to be weighed X is placed on the conveyors 3ba to 3bc, the distortion generated by applying a downward load in the vertical direction on the free end 5c side of the load cell 5 is detected and converted into an electric signal, Weighing is performed based on this electrical signal.

  As shown in FIGS. 3 and 4, the AFV 6 is attached in the internal space of the frame 20 so that the longitudinal direction is along the conveyance direction A, and detects vibration from the floor surface. More specifically, as shown in FIG. 8, the AFV 6 is fixed to the fixing metal block 41, 42, 43 with screws and then fixed to the fixing block 46. In this state, after being housed inside the cover member 47, it is fixed so as to be suspended from the upper surface in the internal space of the frame 20.

As shown in FIGS. 3 and 5, the frame 20 extends in a direction orthogonal to the conveyance direction A, and stores three AFVs 6 arranged in a direction orthogonal to the conveyance direction A in the internal space. Yes.
The mounting structure of the weighing mechanism 30 including the drive motor M2, the load cell 5, the AFV 6, and the frame 20 will be described in detail later.

[Mounting structure of weighing mechanism 30]
As described above, the weighing mechanism 30 is configured to include the conveyors 3ba to 3bc, the drive motor M2, the load cell 5 (fixed end 5b, free end 5c), the AFV 6, and the frame 20 of the second transport unit 3b.
Here, the arrangement of each member will be described with reference to FIG. 7 schematically showing each member excluding the AFV 6 and the frame 20 included in the measuring mechanism 30 and FIG. 3 described in the upper part. .

  As shown in FIGS. 4 and 7, the fixed end 5b and the free end 5c of the load cell 5 are respectively formed at the front end portion and the rear end portion in the transport direction A of the load cell 5, and are drive motors that are heavy objects. M2 is disposed adjacent to the front of the fixed end 5b in a non-contact state with respect to the fixed end 5b. The drive motor M <b> 2 is connected to the free end 5 c side via an arm member 21, a frame member (connecting portion) 22, and an arm member (connecting portion) 23. Thus, by arranging the driving motor M2, which is a heavy object, on the fixed end 5b side, the position of the center of gravity of the weighing mechanism 30 can be moved from the free end 5c side to the side closer to the fixed end 5b. As a result, since the center of gravity of the weighing mechanism 30 can be placed in the vicinity of the fixed end 5b connected to the floor surface, it is possible to avoid a decrease in measurement accuracy due to the influence of vibration from the floor surface.

  The arm members 21 and 23 and the frame member 22 are formed of a material having high thermal conductivity, like the fixed end 5b and the free end 5c. For this reason, the heat released from the drive motor M2 serving as a heat source during operation is transmitted to the free end 5c side via the directly connected arm member 23, frame member 22, and arm member 21. On the other hand, the heat released from the drive motor M2 is transmitted through air and also as radiant heat to the fixed ends 5b arranged in a non-contact state but adjacent to each other. At this time, the heat directly transmitted to the load cell 5 through the arm members 21 and 23 and the heat transmitted from the short distance through the air are different in path length through which the heat is transmitted. Therefore, the heat is transmitted to the load cell 5 uniformly.

Next, the arrangement of the entire weighing mechanism 30 including the AFV 6 and the frame 20 will be described with reference to FIGS. 2, 3, 5, and 6 described above.
As shown in FIG. 2, the frame 20 to which the load cell 5 and the AFV 6 are attached is connected to the pair of front and rear legs 10 and 11 described above. For this reason, the AFV 6 attached to the internal space of the frame 20 can effectively detect vibration from the floor surface via the legs 10 and 11. And the load cell 5 is being fixed to the upper part of the flame | frame 20, as shown in FIG. That is, the load cell 5 and the AFV 6 are respectively attached to the front and back surfaces of the top plate of a common member (frame 20). Thereby, the vibration of the floor surface transmitted to the load cell 5 can be accurately detected by the AFV 6. As a result, highly accurate weighing can be performed by subtracting the detection result in the AFV 6 from the weight value of the load cell 5. At this time, the weighing mechanism including the load cell 5 and the AFV 6 is attached in the vicinity of the bent portion of the frame 20. Thereby, the weighing mechanism having a relatively large weight can be attached to the portion of the frame 20 having high rigidity.

  Further, the mounting positions of the load cell 5 and the AFV 6 with respect to the frame 20 are arranged on the same straight lines L1, L2, L3 along the transport direction A in plan view, as shown in FIGS. In other words, when viewed from the front in the transport direction A, the load cell 5 and the AFV 6 are attached so that their attachment positions with respect to the frame 20 are on the same vertical line. As a result, vibration in a direction perpendicular to the transport direction A can be detected under the same conditions in the load cell 5 and the AFV 6, so that highly accurate weighing can be performed.

[Features of weight checker 1]
(1)
In the weight checker 1 of the present embodiment, as shown in FIG. 2, a plurality of conveyors 3 ba to 3 bc are arranged in parallel in a direction orthogonal to the conveyance direction A of the object to be weighed X. As shown in FIG. 3, each of the conveyors 3 ba to 3 bc includes a load cell 5 that measures the object to be measured X, and an AFV 6 that detects and eliminates the influence of vibration that the load cell 5 receives from the floor during measurement. It is equipped with. And AFV6 is accommodated in the internal space of the flame | frame 20 extended in the direction orthogonal to the conveyance direction A so that it may straddle the some conveyor 3ba-3bc arranged in parallel.

  As described above, the AFV 6 is arranged in the internal space of the frame 20 extending in the direction orthogonal to the conveyance direction A of the weighing object X, so that the AFV 6 cannot be attached to the fixed end 5 b of the load cell 5. Even with the checker 1, the installation space for the AFV 6 can be ensured. In particular, for example, in the case of the conveyors 3ba to 3bc that are narrow in the width direction for conveying elongate articles such as stick sugar, it becomes more difficult to secure a space for installing the AFV 6, but there is a space inside the above. The installation space of the AFV 6 can be easily ensured by arranging the frame 20 having it along the direction orthogonal to the transport direction. As a result, even with a small weight checker, highly accurate weighing can be performed by mounting the AFV 6 and detecting the influence of vibration from the floor surface and eliminating it from the detection result of the load cell 5.

(2)
In the weight checker 1 of this embodiment, as shown in FIGS. 6 to 8, the load cell 5 and the AFV 6 are arranged such that the longitudinal direction thereof is along the transport direction A.
Thereby, the size of the load cell 5 and the AFV 6 in the direction orthogonal to the transport direction A can be minimized. Therefore, as in the present embodiment, it is possible to mount the narrow-type conveyors 3ba to 3bc on the weight checker 1 in which a plurality of conveyors 3ba to 3bc are arranged in parallel.

(3)
In the weight checker 1 of the present embodiment, as shown in FIG. 5, the weighing mechanism 30 including the load cell 5 and the AFV 6 is attached in the vicinity of the bent portion of the frame 20 (see the attachment position 5a of the load cell 5).
Accordingly, by attaching the weighing mechanism 30 that is a heavy object in the vicinity of a portion having a high rigidity in the frame 20, it is possible to perform measurement and vibration detection from the floor surface in a stable state in the load cell 5 or the AFV 6.

(4)
In the weight checker 1 of the present embodiment, as shown in FIG. 3 and the like, the load cell 5 and the AFV 6 are attached to the top and bottom surfaces of the top plate in the frame 20 that is a common member.
Thereby, the influence of the vibration from the floor surface detected in the load cell 5 can be detected in the AFV 6 under substantially the same conditions. Therefore, it is possible to appropriately remove the influence of vibration from the floor surface from the measurement result in the load cell 5 and perform highly accurate measurement.

(5)
In the weight checker 1 of this embodiment, as shown in FIGS. 5 and 6, the load cell 5 and the AFV 6 are arranged so that the mounting positions thereof are aligned on a vertical line when viewed from the front in the transport direction A.
Thereby, in AFV6, since the influence of the vibration in the direction orthogonal to the conveyance direction A of the object to be measured X can be detected under almost the same conditions as the load cell 5, the detection result in the AFV6 can be subtracted from the measurement result in the load cell 5. Highly accurate weighing can be performed.

(6)
In the weight checker 1 of the present embodiment, as shown in FIG. 2, the frame 20 that houses the AFV 6 is connected to the pair of front and rear legs 10 and 11.
Thereby, the influence of the vibration from the floor surface can be appropriately detected in the AFV 6, and the influence of the floor vibration can be excluded from the measurement result in the load cell 5 similarly attached to the frame 20. As a result, more accurate weighing can be performed.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.
(A)
In the embodiment described above, an example in which the load cell 5 is used as the first weighing sensor has been described. However, the present invention is not limited to this.

For example, a force balance may be used as the first weighing sensor instead of the load cell.
In this case, by detecting the current value generated by the differential transformer in the force balance that occurs when the object to be weighed is placed on the weighing position, the force balance characteristic allows the load cell to be used as a weighing sensor. Further, highly accurate weighing can be performed.

The same applies to the second weighing sensor (AFV).
(B)
In the above-described embodiment, an example in which a pipe-shaped member having a rectangular cross section is used as the frame 20 that houses the AFV 6 therein has been described. However, the present invention is not limited to this.

For example, a pipe-shaped support member having a circular, elliptical, or polygonal cross section can be used.
(C)
In the said embodiment, the example using the multiple-type conveyor apparatus 3 by which three conveyor 3ba-3bc was arrange | positioned in parallel was given and demonstrated. However, the present invention is not limited to this.
For example, one or two conveyors may be arranged in parallel, or four or more conveyors may be arranged in parallel.

(D)
In the said embodiment, the load cell 5 was demonstrated and demonstrated with the example attached with respect to the flame | frame 20 to which AFV6 is attached. However, the present invention is not limited to this.
For example, the attachment member of the load cell 5 may be a member other than the frame.
However, since the load cell 5 is also attached to the same member as the AFV 6 as in the above embodiment, various vibrations transmitted to the load cell 5 can be detected under almost the same conditions in the AFV 6, so that more accurate measurement is possible. From the point of view of performing the above, it is more preferable to do as in the above embodiment.

(E)
In the above embodiment, an example in which the present invention is applied to the weight checker 1 has been described. However, the present invention is not limited to this.
For example, in addition to the weight checker, the present invention can also be applied to a weight inspection apparatus that is equipped with a weighing hopper, various weighing sensors, and the like and performs weighing with the first and second weighing sensors. Even in this case, adverse effects due to vibration from the floor surface can be reduced, and highly accurate weighing can always be performed.

  The weight detection device according to the present invention can ensure a space for arranging the second weighing sensor, and can detect the influence of floor vibrations even when the weight detection device is small in the direction orthogonal to the transport direction. Therefore, it can be widely applied to various weighing devices equipped with a weighing sensor for eliminating the influence of floor vibration.

The front view which shows the external appearance of the weight checker which concerns on one Embodiment of this invention. The top view which shows the weight checker of FIG. FIG. 2 is an enlarged view showing a structure around a weighing mechanism included in the weight checker of FIG. The figure which expanded further the part of the measurement mechanism of FIG. The top view which shows the attachment position of the measurement mechanism of FIG. The figure which looked at the measurement mechanism of FIG. 4 from the conveyance direction. The figure which showed typically the attachment structure of the measurement mechanism of FIG. The perspective view which shows the hanging attachment structure of the load cell contained in the measurement mechanism of FIG.

Explanation of symbols

1 Weight checker (weight detector)
DESCRIPTION OF SYMBOLS 3 Conveyor apparatus 3a 1st conveyance part 3b 2nd conveyance part 3c 3rd conveyance part 3aa-3ac Conveyor 3ba-3bc Conveyor 3ca-3cc Conveyor 5 Load cell (measurement sensor, 1st measurement sensor)
5a Mounting position 5b Fixed end (adjustment mechanism, windbreak wall)
5c Free end 6 AFV (load cell, second weighing sensor)
6a Mounting position 7 Case 10, 11 Leg 13 Roller (drive roller)
15 Roller (driven roller)
20 frame (support member)
21 Arm member (connecting part)
22 Frame member (connection part)
23 Arm member (connecting part)
30 Weighing mechanism M1 Drive motor M2 Drive motor (heavy object, heat source)
M53 Heavy item X Item to be weighed

Claims (6)

A weight detection device that performs weighing while conveying an object to be weighed,
A transport conveyor for transporting the object to be weighed, a first weighing sensor for weighing the object to be weighed, and a second weighing sensor for removing the influence of floor vibration from the weighing result of the first weighing sensor. A plurality of weighing and conveying mechanisms arranged in parallel;
A support member having a space in the interior extending in a direction substantially orthogonal to the conveyance direction of the object to be weighed across a plurality of the measurement conveyance mechanisms arranged in parallel,
The second weighing sensor is disposed in a space formed inside the support member.
Weight detection device. At least one of the first weighing sensor and the second weighing sensor is arranged so that a longitudinal direction thereof is parallel to a conveyance direction of the object to be weighed by the conveyance conveyor.
The weight detection apparatus according to claim 1. The weighing transport mechanism is attached in the vicinity of a bent portion of the support member.
The weight detection apparatus according to claim 1 or 2. The first weighing sensor and the second weighing sensor are respectively attached to the same member.
The weight detection apparatus of any one of Claim 1 to 3. The first weighing sensor and the second weighing sensor are arranged such that their mounting positions overlap in the transport direction of the object to be weighed in plan view.
The weight detection apparatus of any one of Claim 1 to 4. The support member is fixed at both ends to legs that are erected on the floor surface.
The weight detection apparatus of any one of Claim 1 to 5.

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