Combination Weighing Device

Abstract

To improve waterproofness and prevent deterioration of weighing accuracy.SOLUTION: In a combination weighing device 1, a drive unit 10 is inserted into an opening 100A provided on the side surface of a body 100 in the direction from an outside O to an inside I of the body 100 and attached to the main body 100; a first motor 14, a second motor 13, and a load cell 12 are arranged on the inside I of the body 100 with respect to a base part 11; and in the state where the drive unit 10 is attached to the body 100, at least a part of the first motor 14, the second motor 13, and the load cell 12 is located on a lower side L below a lower end E1 of the opening 100A.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a combination weighing device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, a combination weighing device is known that includes a drive unit that drives a plurality of hoppers and a main body to which the drive unit is attached.

[0003] In such a combination weighing device, when the drive unit is attached to the side of the main body, the height dimension of the drive unit components that are positioned inside the opening provided in the side of the main body is smaller than the height dimension of such opening, so that the drive unit can be attached straight and perpendicular to the side of the main body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] Patent No. 5406381 Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, the importance of hygiene in manufacturing plants has increased, and it has become necessary to improve the waterproofing of combination weighing devices so that they can be washed with water.

[0006] However, with the current configuration of the drive unit in the above-mentioned combination weighing device, there is a problem in that it is difficult to reduce the dimension in the height direction, and it is difficult to improve the waterproof performance.

[0007] Furthermore, in the above-mentioned combination weighing device, a motor for driving the pool hopper is located directly below the load cell, but the load cell is easily affected by heat generated by the motor, which can cause a problem of deteriorating weighing accuracy.

[0008] Therefore, the present invention has been made in consideration of the above problems, and has an object to provide a combination weighing device that has improved waterproofing and can prevent deterioration of weighing accuracy. [Means for solving the problem]

[0009] A combination weighing device according to one embodiment has a first hopper that temporarily stores articles input from the outside and then discharges the articles downstream, a second hopper that temporarily stores the articles discharged from the first hopper and then discharges the articles downstream, a drive unit that drives the first hopper and the second hopper, and a main body to which the drive unit is attached, and the drive unit is configured to be inserted into an opening provided on a side of the main body in a direction from the outside to the inside of the main body and attached to the main body, and when the drive unit is attached to the main body, The container has a base portion that covers the opening and isolates the inside and outside of the main body, a first motor that drives the first hopper, a second motor that drives the second hopper, and a load cell that detects the weight of the items stored in the second hopper, wherein the first motor, the second motor, and the load cell are disposed inside the main body with the base portion as a reference, and when the drive portion is attached to the main body, at least a portion of the first motor, the second motor, and the load cell are positioned below the lower end of the opening. Effect of the Invention

[0010] According to the present invention, it is possible to provide a combination weighing device that has improved waterproofing and is capable of preventing a deterioration in weighing accuracy. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view showing an example of the overall configuration of a combination weighing device 1 according to one embodiment. [Diagram 2] FIG. 2 is a diagram for explaining an example of the main body 100 and the driving unit 10 of the combination weighing device 1 according to one embodiment. [Diagram 3] FIG. 3 is a diagram for explaining an example of the configuration of the drive unit 10 in a state where it is attached to the main body 100 of the combination weighing device 1 according to one embodiment. [Figure 4] FIG. 4 is a diagram for explaining an example of the arrangement of the bracket 15, the first board 15A, and the second board 15B in the driving section 10 of the combination weighing device 1 according to one embodiment. [Diagram 5] FIG. 5 is a diagram for explaining an example of the load cell 12 in the driving unit 10 of the combination weighing device 1 according to one embodiment. [Figure 6] FIG. 6 is a diagram for explaining an example of the ferrite core 17 in the driving unit 10 of the combination weighing device 1 according to one embodiment. [Figure 7] FIG. 7 is a diagram showing an example of a state in which the driving unit 10 of the combination weighing device 1 according to one embodiment is placed upright. [Figure 8] FIG. 8 is a diagram showing an example of a state in which the driving unit 10 of the combination weighing device 1 according to one embodiment is placed horizontally. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. In the following description of the drawings, the same or similar parts are given the same or similar reference numerals. However, it should be noted that the drawings are schematic and the ratios of the dimensions are different from the actual ones. Therefore, the specific dimensions should be determined with reference to the following description. In addition, the drawings may include parts with different dimensional relationships and ratios. In this specification and the drawings, elements having substantially the same functions and configurations are given the same reference numerals to avoid repeated explanations, and elements not directly related to the present invention are not illustrated.

[0013] (First embodiment) Hereinafter, a combination weighing device 1 according to a first embodiment of the present invention will be described with reference to Figs.

[0014] As shown in FIG. 1, the combination weighing device 1 of this embodiment has a dispersion table 20, a radial feeder 30, a flow rate regulating section 40, a support section 50, a pool hopper 60, a weighing hopper 70, a chute 80, and a timing hopper 90.

[0015] The dispersion table 10 may be configured to supply the articles input from the outside to a plurality of radial feeders 30 arranged around the dispersion table 20 while dispersing the articles.

[0016] Each of the multiple radial feeders 30 is configured to transport the articles supplied from the dispersion table 20 to a pool hopper 60 provided corresponding to each radial feeder 30.

[0017] Although not shown in the present embodiment, a booster hopper may be disposed downstream of the weighing hopper 70 and upstream of the chute 80.

[0018] Moreover, each radial feeder 30 has a conveying path for conveying the articles, and a flow rate restricting unit 40 is disposed on the conveying path. The flow rate restricting unit 40 is configured to restrict the flow rate of the articles conveyed to the pool hopper 60. Moreover, the support unit 50 is configured to support the flow rate restricting unit 40.

[0019] Each pool hopper 60 is configured to deliver the articles supplied from each radial feeder 30 to a weighing hopper 70 disposed below each pool hopper 60 .

[0020] Each weighing hopper 70 is configured to obtain the weight value of the articles that are delivered from each pool hopper 60 and temporarily stay therein.

[0021] Here, the control unit (not shown) is configured to select, from the combinations of weight values ​​obtained by each weighing hopper, a combination that is within a predetermined tolerance range and is closest to the target value, and to discharge temporarily retained items from the weighing hopper 70 corresponding to that combination into a chute 80 arranged below that weighing hopper 70.

[0022] Here, each pool hopper 60 corresponds to a first hopper that temporarily stores items input from outside and then discharges such items downstream, and each weighing hopper 70 corresponds to a second hopper that temporarily stores the items discharged from each pool hopper 60 (first hopper) and then discharges such items downstream.

[0023] The chute 80 is configured to supply the articles discharged from each weighing hopper 70 to a timing hopper 90.

[0024] The timing hopper 90 is configured to supply the articles supplied by the chute to, for example, a bag-making packaging machine or the like installed downstream of the conveying device 1.

[0025] Furthermore, as shown in FIG. 2, the combination weighing device 1 according to this embodiment has a plurality of drive units 10 that drive each of the pool hoppers 60 and each of the weighing hoppers 70, and a main body 100 to which the drive units 10 are attached.

[0026] As shown in FIG. 2, each drive unit 10 is configured to be attached to the main body 100 by being inserted into an opening 100A provided on a side of the main body 100 in a direction from the outside O to the inside I of the main body 100.

[0027] In this combination weighing device 1, the height dimension of the components (internal components) of the drive unit 10 arranged inside I of an opening 100A provided on the side surface of the main body 100 is larger than the height dimension of the opening 10A. Therefore, the drive unit 10 can be attached to the side surface of the main body 100 by tilting the drive unit 10 with respect to the opening 100A of the main body 100 and inserting the internal components into the opening 100A.

[0028] As shown in FIG. 3, the drive unit 100 includes a base unit 11, a load cell 12, a second motor 13, a first motor 14, a first hopper link member 16, a first hopper hanger 60A, and a second hopper hanger 70A.

[0029] The base portion 11 is configured to close the opening 100A and isolate the inside I and outside O of the main body 100 when the drive portion 10 is attached to the main body 100.

[0030] The first hopper hanger 60A is configured so that the pool hopper 60 can be attached to its tip, and the second hopper hanger 70A is configured so that the weighing hopper 70 can be attached to its tip.

[0031] The first motor 14 is configured to drive the pool hopper 60 (and the first hopper hanger 60A), and the second motor 13 is configured to drive the weighing hopper 70 (and the second hopper hanger 70A).

[0032] The load cell 12 is configured to detect the weight of the items stored in the weighing hopper 70 .

[0033] The first hopper link member 16 is a member that links the first motor 14 and the first hopper hanger 60A.

[0034] As shown in FIGS. 2 and 3, the first motor 14, the second motor 13 and the load cell 12 are disposed inside the main body 100 with the base portion 11 as a reference.

[0035] 2, in a state in which the driving unit 10 is attached to the main body 100, at least a part of the first motor 14, the second motor 13, and the load cell 12 is located on the lower side L of the lower end E1 of the opening 100A. In the example of FIG. 2, in this state, the first motor 14 is located on the lower side L of the lower end E1 of the opening 100A.

[0036] According to this configuration, the dimension of the opening 100A in the height direction can be reduced, thereby improving the waterproof performance.

[0037] 2 and 3, the first motor 14, the second motor 13, and the load cell 12 are arranged in a line in the up-down direction U / L. In the example of Fig. 2 and Fig. 3, the second motor 13, the load cell 12, and the first motor 14 are arranged in this order from the upper side U. That is, the second motor 13 is arranged on the upper side U of the load cell 12, and the load cell 12 is arranged on the upper side U of the first motor 14.

[0038] Here, among the first motor 14, the second motor 13, and the load cell 12, at least the member arranged on the lowermost side L is arranged offset toward the inside I of the main body 100 with respect to the other members. In the example of Fig. 2 and Fig. 3, the first motor 14 is arranged offset toward the inside I of the main body 100 with respect to the second motor 13 and the load cell 12.

[0039] According to this configuration, since the first motor 14 is not disposed directly below the load cell 12, the effect of heat generated by the first motor 14 on the load cell 12 is reduced, and the weighing accuracy can be improved.

[0040] As shown in FIG. 4, the driving section 10 may further include a bracket 15, a first board 15A, and a second board 15B.

[0041] As shown in FIG. 3, the bracket 15 is disposed on the inner side I of the main body 100 relative to the second motor 13, and is fixed to the weighing hopper .

[0042] For example, the first board 15A is a driver board for a stepping motor for opening and closing the pool hopper 60 and the weighing hopper 70, and the second board 15B has an opening and closing control and preamble circuit for the pool hopper 60 and the weighing hopper 70.

[0043] As shown in FIGS. 3 and 4, the substrate 15B is disposed on the outer side O of the main body 100 relative to the first substrate 15A.

[0044] As shown in FIGS. 3 and 4, the first substrate 15A and the second substrate 15B are fixed to the bracket 15 with their back surfaces facing each other.

[0045] 3, the first board 15A and the second board 15B are disposed on the inner side I of the main body 100 relative to the second motor 13 and the load cell 12, and are disposed on the upper side U relative to the first motor 14. Here, as shown in FIG. 4, the second board 15B is disposed on the back side (inner side I) of the second motor 13.

[0046] According to this configuration, by arranging the first board 15A and the second board 15B as described above, it is possible to fit the internal components of the drive unit 10 into a minimum space, and there is an advantage that there is no need to increase the size of the main body 100.

[0047] As shown in FIG. 5, the load cell 12 has a pair of upper and lower parallel beams 12A each having a thin portion (notch) 12B at two positions, front and rear, in the longitudinal direction.

[0048] Here, as shown in FIG. 3, at least one of the thin-walled portion 12B provided on the parallel beam 12A on the upper side U and the thin-walled portion 12B provided on the parallel beam 12A on the lower side L is positioned so as not to overlap with the first hopper link member 18 when viewed horizontally.

[0049] In the example of Fig. 3, the thin portion 12B provided on the parallel beam 12A on the upper side U is arranged so as not to overlap with the first hopper link member 18 in a horizontal view. Specifically, the first hopper link member 18 has a crank shape as shown in Fig. 3.

[0050] As shown in FIG. 3, the base portion 11 is inclined with respect to the vertical direction so that the upper end portion UE is located on the outer side O of the main body 100 relative to the lower end portion LE. Usually, in the combination weighing device 1, in order to adjust the offset characteristics, a four-corner adjustment is performed by scraping the vicinity of the end face of the thin-walled portion 12B with a file or the like. Therefore, in the combination weighing device 1, it is necessary to access the thin-walled portion 12B.

[0051] In this regard, according to the above-mentioned configuration, as shown in Fig. 3, the base portion 11 is inclined and the first hopper link member 18 has a crank shape, so that the thin-walled portion 12B provided on the parallel beam 12A on the upper side U is exposed without overlapping with other members in a horizontal view. As a result, access to the thin-walled portion 12B becomes easy when adjusting the four corners, improving the workability of the four corner adjustment, and reducing the number of work steps, which leads to an effect of reducing costs.

[0052] As shown in FIGS. 2 and 6, the driving unit 10 may further include a ferrite core 17 attached to the harness 17A and a load cell bracket 18 fixed to the load cell 12.

[0053] Here, the ferrite core 17 is a ferrite core for removing noise, which is attached to the harness 17A between the load cell 12 and the first board 15A.

[0054] As shown in FIG. 6, the ferrite core 17 is supported by the rear surface of the first substrate 15A (position A in FIG. 6), the bottom plate 15C provided at the lower end of the bracket 15 (position B in FIG. 6), and the protrusion 18A on the side of the load cell bracket 18 (position C in FIG. 6).

[0055] Specifically, as shown in Fig. 6, the ferrite core 17 is supported at three points as described above, and is fixed by being pressed down by the board cover 19. In addition, since the length of the harness 17A between the load cell 12 and the first board 15A is short, the ferrite core 17 is pulled clockwise with the above-mentioned protrusion 18A and the bottom plate 15C as fulcrums, as shown in Fig. 6, and the position of the ferrite core 17 is uniquely determined.

[0056] According to this configuration, the position of the ferrite core 17 becomes clear, and the worker can assemble the ferrite core 17 without thinking. Also, according to this configuration, since it does not depend on the assembling method of the worker, it is possible to eliminate the variation in the assembly of the ferrite core 17, shorten the number of work steps, and reduce the cost.

[0057] As shown in FIGS. 2 and 7, the driving unit 10 may further include a board cover 19 that covers the inside I of the main body 100 of the first board 15A, and a measurement sensing unit 102.

[0058] The measurement sensing part 102 is connected to the free end side of the load cell 12, and an article can be weighed by placing the article on the measurement sensing part 102.

[0059] As shown in FIG. 3, in the combination weighing device 1 according to this embodiment, the measurement sensing part 102 protrudes outward beyond the flange part of the base part 11.

[0060] Here, as shown in FIG. 7, when the drive unit 10 is placed upside down (vertical placement), the upper end of the first hopper hanger 60A and the board cover 19 are supported by being grounded (G).

[0061] As shown in FIG. 8, the drive unit 10 may further include a stopper 101 attached to the inner side I of the body 100 of the first motor 14.

[0062] Here, as shown in FIG. 8, when the drive unit 10 is placed with its end in the width direction W facing downward (horizontal placement), the end in the width direction W of the base portion 11, the end in the width direction W of the board cover 19, and the end in the width direction W of the stopper 101 are supported by being grounded (G).

[0063] According to this configuration, the measurement-time sensing part 102 protrudes outward further than the flange part of the base part 11, and even if the flange part of the base part 11 is inclined relative to the vertical direction, the drive part 10 alone can be placed vertically or horizontally without placing a burden on the measurement-time sensing part 102.

[0064] According to the combination weighing device 1 according to this embodiment, it is possible to improve waterproofing and prevent deterioration of weighing accuracy.

[0065] Although the present invention has been described in detail using the above-mentioned embodiment, it is clear to those skilled in the art that the present invention is not limited to the embodiment described in the present specification. The present invention can be implemented in modified and altered forms without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description in this specification is intended to be illustrative and does not have any limiting meaning on the present invention. [Explanation of symbols]

[0066] 1...Combination weighing device 10...Drive unit 11...Base section 12...Load cell 12A…Parallel beam 12B…Thin wall part 13…Second motor 14…First motor 15…Bracket 15A…First board 15B…Second board 15C…Bottom plate 16...First hopper link member 17…Ferrite core 17A…Harness 18…Load cell bracket 18A…Convex part 19…Circuit board cover 20…Dispersion table 30...Radiant feeder 40...Flow rate regulation section 50...Support part 60…Pool hopper 60A…First Hopper Hanger 70…Weighing hopper 70A…Second hopper hanger 80...Shoot 90…Timing Hopper 100…Main body 100A…Opening 101...Stopper 102...Measuring sensing part

Claims

1. a first hopper for temporarily storing an article input from the outside and then discharging the article downstream; a second hopper that temporarily stores the articles discharged from the first hopper and then discharges the articles downstream; A drive unit that drives the first hopper and the second hopper; A main body to which the drive unit is attached, The drive unit is configured to be inserted into an opening provided on a side surface of the main body in a direction from the outside to the inside of the main body and attached to the main body, The drive unit is a base portion that closes the opening and isolates the inside and outside of the main body when attached to the main body; A first motor that drives the first hopper; A second motor that drives the second hopper; a load cell for detecting the weight of the items stored in the second hopper, the first motor, the second motor, and the load cell are disposed inside the main body with respect to the base portion; A combination weighing device, wherein when the drive unit is attached to the main body, at least a portion of the first motor, the second motor and the load cell are positioned below a lower end of the opening.

2. the first motor, the second motor, and the load cell are arranged in a vertical direction; 2. The combination weighing device according to claim 1, wherein at least one of the first motor, the second motor and the load cell that is disposed at the lowest position is offset toward the inside of the main body relative to the other members.

3. the second motor is disposed above the first motor, The drive unit is a bracket disposed inside the main body relative to the second motor and fixed to the second motor; A first substrate; a second substrate disposed on an outer side of the main body than the first substrate, the first substrate and the second substrate are fixed to the bracket with their respective back surfaces facing each other, 3. The combination weighing device according to claim 2, wherein the first board and the second board are disposed inside the main body relative to the second motor and the load cell, and above the first motor.

4. The second motor, the load cell, and the first motor are arranged in this order from the top, The drive unit is A first hopper hanger to which the first hopper is attached at a tip end thereof; a first hopper link member that links the first motor and the first hopper hanger, The load cell has a pair of upper and lower parallel beams each having a thin-walled portion at two positions, front and rear, in a longitudinal direction, the base portion is inclined with respect to a vertical direction so that an upper end portion is positioned outside the main body relative to a lower end portion; 4. The combination weighing device according to claim 3, wherein at least one of the thin-walled portion provided on the upper parallel beam and the thin-walled portion provided on the lower parallel beam is arranged so as not to overlap with the first hopper link member in a horizontal view.

5. The drive unit is a ferrite core attached to a harness between the load cell and the first board; a load cell bracket attached to the load cell, 5. The combination weighing device according to claim 3, wherein the ferrite core is supported by a rear surface of the first board, a bottom surface provided at a lower end of the bracket, and a convex portion on a side surface of the load cell bracket as fulcrums.

6. the driving unit further includes a substrate cover that covers a side of the first substrate opposite to the base portion side, The combination weighing device according to claim 4, wherein when the driving unit is placed with its upside down, the driving unit is supported by an upper end of the first hopper hanger and the base plate cover being grounded.

7. the drive unit further includes a stopper attached to a side of the first motor opposite to the base unit side, The combination weighing device according to claim 3 or 4, wherein when the drive unit is placed with its widthwise end facing downward, the drive unit is supported by the widthwise end of the base portion, the widthwise end of the bracket, and the widthwise end of the stopper contacting the ground.

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