JP2018065652A - Article supply device and method for manufacturing article supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an article supply device capable of stably supplying an article, and a method for manufacturing the article supply device.SOLUTION: An article supply device 5 comprises: a first conveyance feeder 30 that conveys an article supplied from an outside and supplies the article to a first weigher 3; and a second conveyance feeder 32 that conveys the article and supplies the article to a second weigher 3 adjacent to the first weigher 3. The first conveyance feeder 30 and the second conveyance feeder 32 are adjacently arranged, and one of the conveyance feeders has an eigen frequency different from a drive frequency set for the other of the conveyance feeders.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an article supply apparatus and an article supply apparatus manufacturing method.

  As a conventional article supply apparatus, for example, an apparatus described in Patent Document 1 is known. The article supply apparatus described in Patent Literature 1 includes a plurality of vibration feeders that convey articles, and selects and drives a desired vibration feeder from among the plurality of vibration feeders. The article supply device varies the natural frequencies of the plurality of vibration feeders, and drives the selected vibration feeder at the same frequency as the natural frequency.

JP-A-9-278147

  As an article supply apparatus, there is an apparatus that supplies articles to each of the dispersion units of two weighing machines. The article supply apparatus having such a configuration includes two conveyance feeders that convey articles by vibration, and each of the two conveyance feeders supplies articles to a corresponding dispersion unit. In the article supply apparatus, when one conveyance feeder supplies an article to the dispersion unit, the supply amount of the article from the other conveyance feeder to the dispersion unit is decreased, and the article is stored in the other conveyance feeder. Thus, the article supply device stabilizes the article supply to the dispersion unit.

  In the article supply apparatus, from the viewpoint of space saving, the two transport feeders are arranged adjacent to each other so that the transport directions are opposite to each other. In this configuration, when one transport feeder is activated, the adjacent transport feeder is excited by the wind pressure generated by the operation of the one transport feeder. Therefore, the operation of one transport feeder causes the other transport feeder to unintentionally vibrate and supply the article. Accordingly, the supply of the article becomes unstable.

  An object of one aspect of the present invention is to provide an article supply apparatus that can stably supply articles and a method for manufacturing the article supply apparatus.

  An article supply apparatus according to an aspect of the present invention includes a first transport feeder that transports articles supplied from the outside and supplies articles to the first weighing machine, a first transport feeder that transports articles, and is adjacent to the first weighing machine. A second transport feeder that supplies articles to the weighing machine, the first transport feeder and the second transport feeder are arranged adjacent to each other, and the natural frequency of one transport feeder is the other It is different from the drive frequency set for the transport feeder.

  In the article supply apparatus according to one aspect of the present invention, the natural frequency of one transport feeder is different from the drive frequency set for the other transport feeder. Therefore, for example, even when the first transport feeder operates to transport an article and a wind pressure is generated, the natural frequency and the drive frequency are different, so the second transport feeder is excited and vibrates. Can be suppressed. Thereby, in the article supply apparatus, it is possible to suppress the supply of articles unintentionally by the other transport feeder by the operation of one of the first transport feeder and the second transport feeder. Therefore, the article supply apparatus can supply articles stably.

  In one embodiment, the drive frequency set for the other transport feeder may be set higher than the natural frequency of one transport feeder. Generally, when an article is placed on the transport feeder, the natural frequency of the transport feeder is lowered. Therefore, when the drive frequency of the other transport feeder is lower than the natural frequency of one transport feeder, when an article is placed on one transport feeder, the drive frequency of the other transport feeder and the natural frequency of one transport feeder Can be the same (drive frequency = natural frequency). As a result, the peak of the amplitude increases, which may cause unintended excitation of one of the transport feeders. In this case, the supply of articles can still be unstable. Therefore, in one embodiment, unintentional excitation can be suppressed by setting the drive frequency set for the other transport feeder to be higher than the natural frequency of the one transport feeder.

  In one embodiment, the 1st conveyance feeder and the 2nd conveyance feeder may be arranged adjacent so that the conveyance direction of an article may become mutually opposite. In this configuration, excitation of one of the transport feeders is likely to occur due to the operation of one of the transport feeders. Therefore, the article supply apparatus is particularly effective in the case of such a configuration.

  A method for manufacturing an article supply apparatus according to one aspect of the present invention includes a first conveyance feeder that conveys articles supplied from the outside and supplies articles to a first weighing machine, and conveys articles to the first weighing machine. An article supply apparatus comprising: a second transport feeder that supplies an article to an adjacent second weighing machine; wherein the first transport feeder and the second transport feeder are installed adjacent to each other; At least one of the natural frequency and the drive frequency is set so that the natural frequency and the drive frequency of the other transport feeder are different.

  In the method for manufacturing an article supply apparatus according to one aspect of the present invention, the natural frequency of one transport feeder is made different from the drive frequency of the other transport feeder. Therefore, for example, even when the first transport feeder operates to transport an article and a wind pressure is generated, the natural frequency and the drive frequency are different, so the second transport feeder is excited and vibrates. Can be suppressed. Thereby, in the article supply apparatus manufactured by the above manufacturing method, the operation of one of the first transport feeder and the second transport feeder prevents the other transport feeder from unintentionally supplying an article. it can. Therefore, the manufacturing method can manufacture an article supply apparatus that can stably supply articles.

  In one embodiment, the drive frequency may be set to be higher than the natural frequency. When an article is placed on the transport feeder, the natural frequency of the transport feeder is lowered. Therefore, when the drive frequency is lower than the natural frequency, when the article is placed on the transport feeder, the drive frequency and the natural frequency can be the same (drive frequency = natural frequency). As a result, the peak of the amplitude increases, which may cause unintended excitation of one of the transport feeders. In this case, the supply of articles can still be unstable. Therefore, in one embodiment, unintentional excitation can be suppressed by setting the drive frequency higher than the natural frequency.

  In one embodiment, the first transport feeder and the second transport feeder may be installed adjacent to each other so that the transport directions of articles in the first transport feeder and the second transport feeder are opposite to each other. In this configuration, excitation of one of the transport feeders is likely to occur due to the operation of one of the transport feeders. Therefore, the manufacturing method of the article supply apparatus is particularly effective in the case of such a configuration.

  According to one aspect of the present invention, articles can be supplied stably.

It is a perspective view of a combination weighing device provided with an article supply device according to an embodiment. It is a front view of the combination weighing device shown in FIG. It is a side view of the combination weighing device shown in FIG. It is a top view of the combination weighing device shown in FIG. It is a block diagram which shows the structure of a combination weighing device.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

  As shown in any of FIGS. 1 to 4, the combination weighing device 1 includes two combination weighing machines (first weighing machine, second weighing machine) 3 and an article supply device 5. The two combination weighing machines 3 have the same configuration. The two combination weighing machines 3 are arranged adjacent to each other and are provided integrally. Each of the combination weighing machines 3 includes a dispersion feeder 7, a plurality of radiation feeders 9, a plurality of pool hoppers 11, a plurality of weighing hoppers 13, a plurality of booster hoppers 15, a collecting chute 17, and a discharge chute 19. The measuring unit 21 (see FIG. 5) and the control unit 22 (see FIG. 5). The combination weighing machine 3 measures the articles supplied by the article supply device 5 so as to have a target measurement value and supplies them to a bag making and packaging machine (not shown). Here, the articles are articles such as agricultural products, marine products, processed foods, and the like that vary in unit mass.

  The dispersion feeder 7 is supplied with articles from the article supply apparatus 5. The dispersion feeder 7 has a conical conveyance surface 7a that spreads downward toward the bottom. The dispersion feeder 7 uniformly conveys the articles discharged from the article supply device 5 to the top of the conveyance surface 7a toward the outer edge of the conveyance surface 7a by vibrating the conveyance surface 7a.

  The plurality of radial feeders 9 are arranged radially along the outer edge of the conveying surface 7 a of the dispersion feeder 7. Each radiating feeder 9 has a trough 9a extending outward from below the outer edge of the conveying surface 7a. Each radiation feeder 9 vibrates the trough 9a to convey the articles discharged from the outer edge of the conveying surface 7a toward the tip of the trough 9a.

  Each pool hopper 11 is disposed below the tip of the trough 9a of each radiation feeder 9. A gate that can be opened and closed is provided at the bottom of each pool hopper 11. Each pool hopper 11 temporarily stores articles discharged from the tip of the corresponding trough 9a with the gate closed, and opens the gate to discharge the temporarily stored articles downward.

  Each weighing hopper 13 is disposed below the gate of each pool hopper 11. A gate that can be opened and closed is provided at the bottom of each weighing hopper 13. Each weighing hopper 13 temporarily stores the articles discharged from the corresponding pool hopper 11 with the gate closed, and opens the gate to discharge the temporarily stored articles downward.

  Each booster hopper 15 is disposed below the gate of each weighing hopper 13. A gate that can be opened and closed is provided at the bottom of each booster hopper 15. Each booster hopper 15 temporarily stores the articles discharged from the gate side of the corresponding weighing hopper 13 with the gate closed, and discharges the temporarily stored articles downward by opening the gate. .

  The collecting chute 17 is formed in a cylindrical shape having an inner surface (not shown) of a truncated cone that tapers downward. The collecting chute 17 is arranged so that the inner surface is located below all the weighing hoppers 13 and all the booster hoppers 15. The collecting chute 17 receives the articles discharged from the gate side of each weighing hopper 13 and the articles discharged from each booster hopper 15 on the inner surface and discharges them downward.

  The discharge chute 19 is disposed below the collective chute 17. The discharge chute 19 discharges the articles discharged from the collecting chute 17 to a bag making and packaging machine (not shown).

  The weighing unit 21 has a plurality of load cells (not shown). Each load cell supports a corresponding weighing hopper 13. The weighing unit 21 measures a measurement value corresponding to the mass of the article when the article is temporarily stored in each weighing hopper 13.

  The control unit 22 is a device that controls various operations in the combination weighing machine 3 and is a signal processing device including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 22 performs combination weighing, such as the conveying operation of the dispersion feeder 7 and each radiation feeder 9, the gate opening / closing operation of each pool hopper 11, the gate opening / closing operation of each weighing hopper 13, and the gate opening / closing operation of each booster hopper 15. The operation of each part of the machine 3 is controlled.

  The control unit 22 stores the weighing value weighed by the weighing unit 21 and the weighing hopper 13 and / or the booster hopper 15 in which articles corresponding to the weighing value are stored. Specifically, when the article weighed by the weighing unit 21 is stored in the weighing hopper 13, the control unit 22 stores the measured value measured by the measuring unit 21 and the article corresponding to the measured value. The weighing hopper 13 is stored in association with it. When the article weighed by the weighing unit 21 is discharged to the booster hopper 15 corresponding to the weighing hopper 13, the control unit 22 corresponds to the weighing value of the article weighed by the weighing unit 21 and the weighing hopper 13. The booster hopper 15 is stored in association with it.

  The control unit 22 calculates a combination of measurement values so that the total value becomes a target value from a plurality of measurement values measured by the measurement unit 21 and respectively associated with the plurality of measurement hoppers 13 and / or booster hoppers 15. To do. Specifically, the control unit 22 calculates a combination of measurement values from a plurality of measurement values output by the measurement unit 21 so that the total value falls within a predetermined range with the target value as a lower limit value. Then, the control unit 22 causes the weighing hopper 13 and / or the booster hopper 15 corresponding to the combination to discharge the article.

  Next, the article supply device 5 will be described. The article supply device 5 is disposed across the two combination weighing machines 3. The article supply device 5 supplies articles supplied from the outside to each combination weighing machine 3. The article supply device 5 includes a first transport feeder 30, a second transport feeder 32, and a sorting device 34.

  The first transport feeder 30 transports articles to one combination weighing machine 3. The first transport feeder 30 has a trough 30 a that extends from the central portion of the two combination weighing machines 3 to the dispersion feeder 7 of one combination weighing machine 3. The 1st conveyance feeder 30 conveys articles | goods toward the front-end | tip part of the trough 30a by vibrating the trough 30a. The tip of the trough 30a is located above the top of the conical conveying surface 7a of the dispersion feeder 7.

  The first transport feeder 30 is supported by a spring (not shown). The first transport feeder 30 is vibrated by a vibration mechanism (not shown). The excitation mechanism has a vibration source. The vibration source includes an electromagnetic coil, a fixed iron core, and a movable iron core. When an alternating current is supplied from the first current supply unit 40 (see FIG. 5) to the electromagnetic coil of the vibration source, the first transport feeder 30 generates an oscillating magnetic field, causing the movable iron core to vibrate up and down, and the trough 30a. Vibrates. The operation of the first current supply unit 40 is controlled by the control unit 22. The current value is adjusted by on / off control of a constant voltage. The controller 22 sets the optimum condition for the current value by adjusting the on-time.

  The second transport feeder 32 transports the article to the other combination weighing machine 3. The second transport feeder 32 has a trough 32 a extending from the central part of the two combination weighing machines 3 to the dispersion feeder 7 of the other combination weighing machine 3. The 2nd conveyance feeder 32 conveys articles | goods toward the front-end | tip part of the trough 32a by vibrating the trough 32a. The tip of the trough 32a is located above the top of the conical conveying surface 7a of the dispersion feeder 7. The first transport feeder 30 and the second transport feeder 32 are disposed so that the base ends of the troughs 32a are adjacent to each other. Thereby, the 1st conveyance feeder 30 and the 2nd conveyance feeder 32 are arrange | positioned adjacently so that the conveyance direction of articles | goods may become reverse direction mutually. The space | interval of the 1st conveyance feeder 30 and the 2nd conveyance feeder 32 is 30 mm, for example.

  The second transport feeder 32 is supported by a spring (not shown). The second transport feeder 32 is vibrated by a vibration mechanism (not shown). The excitation mechanism has a vibration source. The vibration source includes an electromagnetic coil, a fixed iron core, and a movable iron core. When the second conveying feeder 32 is supplied with alternating current (frequency and current of power pulse applied to the electromagnetic coil) from the second current supply unit 42 (see FIG. 5) to the electromagnetic coil of the vibration source, the oscillating magnetic field is generated. The generated movable iron core vibrates up and down, and the trough 32a vibrates. The operation of the second current supply unit 42 is controlled by the control unit 22.

  The sorting device 34 is disposed on the first transport feeder 30 and the second transport feeder 32. The sorting device 34 is provided with an opening 34a. The sorting device 34 sorts articles supplied from the outside via the opening 34 a to the first transport feeder 30 or the second transport feeder 32. Specifically, the sorting device 34 is configured to discharge the supplied article (on the first conveyance feeder 30 side or the second conveyance) based on the load amount of the articles on the first conveyance feeder 30 and the second conveyance feeder 32. Change the feeder 32 side).

  In this embodiment, the natural frequency which one conveyance feeder has differs from the drive frequency set to the other conveyance feeder. Specifically, for example, the natural frequency of the first transport feeder 30 is different from the drive frequency set for the second transport feeder 32. More specifically, for example, the drive frequency set for the second transport feeder 32 is set higher than the natural frequency of the first transport feeder 30. Specifically, the difference between the driving frequency and the natural frequency is set to be 1% or more. As an example, when the natural frequency is 50 Hz, the drive frequency is set higher than 50.5 Hz.

  In the present embodiment, for example, the natural frequency of the first transport feeder 30 is 50.0 Hz, and the drive frequency is 51.5 Hz. The natural frequency of the second transport feeder 32 is 49.8 Hz, and the drive frequency is 51.3 Hz.

  Then, the manufacturing method of the article supply apparatus 5 is demonstrated. First, the first transport feeder 30 and the second transport feeder 32 are installed adjacent to each other. Specifically, the first transport feeder 30 and the second transport feeder 32 are installed adjacent to each other so that the transport directions of the articles are opposite to each other.

  Next, at least one of the natural frequency and the driving frequency is set so that the natural frequency of one transport feeder is different from the drive frequency of the other transport feeder. In the present embodiment, the drive frequency of the second transport feeder 32 is set so that the natural frequency of the first transport feeder 30 and the drive frequency of the second transport feeder 32 are different. Specifically, the natural frequency of the first transport feeder 30 is measured. And the drive frequency of the 2nd conveyance feeder 32 is set so that it may become in a target amplitude range in a frequency band higher than the measured natural frequency.

  As described above, in the article supply device 5 of the combination weighing device 1 according to the present embodiment, the natural frequency of one transport feeder is different from the drive frequency set for the other transport feeder. Therefore, for example, even when the first transport feeder 30 operates to transport an article and wind pressure is generated, the natural frequency and the drive frequency are different, so the second transport feeder 32 is excited to vibrate. Can be suppressed. Thereby, in the article supply device 5, the operation of one of the first transport feeder 30 and the second transport feeder 32 can suppress the other transport feeders from unintentionally supplying the articles. Therefore, the article supply apparatus 5 can supply articles stably.

  In the article supply device 5 of the combination weighing device 1 according to the present embodiment, the drive frequency set for the other transport feeder is set higher than the natural frequency of the one transport feeder. Generally, when an article is placed on the transport feeder, the natural frequency of the transport feeder is lowered. Therefore, when the drive frequency of the other transport feeder is lower than the natural frequency of one transport feeder, when an article is placed on one transport feeder, the drive frequency of the other transport feeder and the natural frequency of one transport feeder Can be the same (drive frequency = natural frequency). As a result, the peak of the amplitude increases, which may cause unintended excitation of one of the transport feeders. In this case, the supply of articles can still be unstable. Therefore, in one embodiment, unintentional excitation can be suppressed by setting the drive frequency set for the other transport feeder to be higher than the natural frequency of the one transport feeder.

  In the article supply device 5 of the combination weighing device 1 according to the present embodiment, the first transport feeder 30 and the second transport feeder 32 are arranged adjacent to each other so that the transport directions of the articles are opposite to each other. In this configuration, excitation of one of the transport feeders is likely to occur due to the operation of one of the transport feeders. Therefore, the article supply apparatus 5 according to the present embodiment is particularly effective in the case of such a configuration.

  As mentioned above, although embodiment of this invention has been described, this invention is not necessarily limited to embodiment mentioned above, A various change is possible in the range which does not deviate from the summary.

  In the embodiment described above, an example in which the article supply device 5 is applied to the combination weighing machine 3 of the combination weighing device 1 has been described. However, the weighing machine that supplies the article by the article supply apparatus 5 is not limited to the combination weighing machine.

  In the said embodiment, the natural frequency which the 1st conveyance feeder 30 has differed from the drive frequency set to the 2nd conveyance feeder 32 was demonstrated to an example. However, the drive frequency set for the first transport feeder 30 may be different from the natural frequency of the second transport feeder 32.

  In the said embodiment, the form which the control part 22 of the combination weighing machine 3 controls the 1st electric current supply part 40 and the 2nd electric current supply part 42 was demonstrated to an example. However, the control unit included in the article supply device 5 may control the first current supply unit 40 and the second current supply unit 42.

  In the above embodiment, an example of a method for manufacturing the article supply apparatus 5 has been described. However, the manufacturing method of the article supply apparatus 5 is not limited to the method described above.

  Specifically, an example in which the natural frequency of one transport feeder is “Fna”, the drive frequency is “Fda”, the natural frequency of the other transport feeder is “Fnb”, and the drive frequency is “Fdb”. Explained. First, Fna and Fnb are measured. Next, Fda and Fdb that are target amplitudes are measured. Subsequently, when the condition of Fda> Fnb × 101% is not satisfied, the spring of the other conveyance feeder is adjusted (the thickness of the leaf spring is adjusted), and Fnb is adjusted so as to satisfy the above condition. If the condition of Fdb> Fna × 101% is not satisfied, the spring of the transport feeder of the other transport feeder is adjusted again, and Fdb is measured again. The above procedure is repeated until Fda> Fnb × 101% and Fdb> Fna × 101% are satisfied. The article supply device 5 is manufactured as described above.

  DESCRIPTION OF SYMBOLS 3 ... Combination weighing machine (1st weighing machine, 2nd weighing machine), 5 ... Article supply apparatus, 30 ... 1st conveyance feeder, 32 ... 2nd conveyance feeder.

Claims (6)

A first transport feeder for transporting articles supplied from the outside and supplying the articles to the first weighing machine;
A second transport feeder for transporting the article and supplying the article to a second weighing machine adjacent to the first weighing machine;
The first transport feeder and the second transport feeder are disposed adjacent to each other,
The article supply device, wherein the natural frequency of one of the transport feeders is different from the drive frequency set for the other transport feeder.   The article supply apparatus according to claim 1, wherein the driving frequency set in the other transport feeder is set to be higher than the natural frequency of the one transport feeder.   3. The article supply apparatus according to claim 1, wherein the first transport feeder and the second transport feeder are arranged adjacent to each other so that transport directions of the articles are opposite to each other. A first transport feeder for transporting articles supplied from the outside and supplying the articles to the first weighing machine;
A second transport feeder for transporting the article and supplying the article to a second weighing machine adjacent to the first weighing machine;
The first conveyance feeder and the second conveyance feeder are installed adjacent to each other, and at least the natural frequency and the drive frequency are set so that the natural frequency of one conveyance feeder is different from the drive frequency of the other conveyance feeder. A method for manufacturing an article supply apparatus, in which one is set.   The manufacturing method of the article supply apparatus according to claim 4, wherein the driving frequency is set to be higher than the natural frequency.   The said 1st conveyance feeder and the said 2nd conveyance feeder are installed adjacently so that the conveyance direction of the said articles | goods of the said 1st conveyance feeder and the said 2nd conveyance feeder may become reverse mutually, The Claim 4 or 5 is installed. The manufacturing method of the article supply apparatus of description.

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