JP5366493B2 - Commodity weigher for combination weigher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology for adjusting the conveyance state of an article on a feeder pan, in an article conveyance device of a combination balance provided with a feeder pan and an excitation device for exciting the feeder pan for conveying the article on the feeder pan. <P>SOLUTION: The feeder pan 5 includes a conveyance surface composed of a conveyance face 51 in a substantially flat surface extending in a conveyance direction of the articles and two wall faces 52, 53 standing along both sides of the conveyance face 51 and one or more portions (different friction portions 55) having different friction coefficients are arranged at the conveyance surface. The different friction portions 55 are portions which have higher friction coefficients than those of other portions of the conveyance surface and arranged at one of the two wall faces 52, 53. The different friction portions 55 are arranged at least at one of an upstream side end, a middle and a downstream side end in the conveyance direction of the conveyance face 51. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an article conveying device provided in a combination weigher, and more particularly to a structure of a feeder pan provided in the article conveying device.

  A combination weigher generally includes a plurality of weighing containers, and various combinations of the weighing values of the objects to be weighed in the plurality of weighing containers are combined, and the combination of the values in which the total weight is closest to the target weight. The item to be weighed is discharged from the weighing container of the selected combination. The combination weigher is provided with an article conveying device for distributing and supplying an object to be weighed to a plurality of weighing containers.

  As the article conveying device as described above, for example, as described in Patent Document 1, a device provided with a dispersion feeder and a plurality of linearly-feeding feeders arranged radially so as to surround the dispersion feeder is known. It has been. The dispersion feeder is provided with a conical top cone and a vibrator for imparting vibration to the top cone. The article (the object to be weighed in the combination weigher) supplied to the approximate center of the top cone is placed on the top cone. Falls while being dispersed by the inclination and vibration, and falls from the periphery of the top cone to the straight feeder. Further, the straight feeder includes a feeder pan (also referred to as a trough) and a vibrator that applies vibration to the feeder pan. Then, the articles sent from the dispersion feeder to the feeder pan of the linear feeder are conveyed downstream by the vibration of the feeder pan and fall to a supply hopper provided corresponding to each linear feeder. The article that has dropped onto the supply hopper is put into a weighing hopper (measuring container) disposed below the supply hopper.

  The feeder pan of the straight feeder as described above generally has a bottom plate on which a conveying surface for conveying articles is formed from the lower peripheral edge of the top cone of the dispersion feeder to above the supply hopper, and stands along each side of the bottom plate. The side wall is integrally formed. The feeder pans of the plurality of rectilinear feeders provided in the combination weigher are arranged so as to surround the periphery of the top cone of the dispersion feeder in an annular manner so that the side walls of the adjacent feeder pans overlap each other. Yes.

  In the combination weigher as described above, it may be necessary to regularly convey the article to a subsequent process by the article conveying apparatus. For example, the articles are arranged in a certain direction by the article conveying device and put into the supply hopper, or the articles are put into the supply hopper at a predetermined interval by the article conveying device.

  2. Description of the Related Art Conventionally, with respect to a parts feeder, a technique for conveying a large number of articles having the same shape in a certain direction is known. For example, Patent Document 2 describes an article alignment apparatus that aligns articles to be conveyed using a difference in friction coefficient between a receiving surface (conveying surface) and vibration. This article alignment apparatus has a V-groove receiving surface, a conveying body having a high friction coefficient at the upper portion of the receiving surface and a lower friction coefficient at the lower portion of the receiving surface, and a V-groove shape with respect to the conveying body. Reciprocating drive means for providing a horizontal reciprocating motion in the length direction of the receiving surface, and an article that is arbitrarily put into the V-groove receiving surface is in a certain direction due to a difference in friction coefficient between the lower receiving surface and the upper receiving surface To be aligned.

Further, for example, in Patent Document 3, a lining material is used for the purpose of preventing wear of the metal surface of the bowl due to collision between parts or between the part and the bowl, and for increasing or decreasing the feeding speed of the part. A vibration-type parts feeder that uses vibration such as electromagnetic vibration is provided. This parts feeder is provided with a spiral track that aligns and conveys parts on the inner surface of a funnel-shaped bowl. By applying rotational circular vibration to the bowl, the parts to be conveyed accommodated in the bowl are removed from the bowl. The parts are automatically supplied to a processing machine or the like by a chute from there. And, in this parts feeder, the lining material comprising a loop assembly to the inner bottom surface of the funnel-shaped bowl and the spiral track, except for all or part of the bottom surface and side surfaces of the parts contacting each other Is stretched.
Japanese Utility Model Publication No. 6-25223 JP-A-7-2340 Japanese Utility Model Publication No. 2-26024

  In the article conveying apparatus of the combination weigher as described above, the articles are irregularly supplied from the dispersion feeder onto the feeder pan of the linear feeder. For this reason, the article conveyed by the article conveying device is, for example, a long article having a short direction and a long direction, and the length in the long direction is the width of the feeder surface of the feeder pan of the linear feeder ( If the length is longer than the length in the direction substantially perpendicular to the conveying direction, the long component may be stretched between the side walls of the feeder pan to generate a bridge.

  Further, in the article conveying device of the combination weigher, the article supplied from the dispersion feeder to the feeder pan of the linear feeder may stagnate at the supplied point and cause a bridge. Further, in the article conveying device of the combination weigher, articles that are too vigorous by the feeder pan of the straight feeder may be conveyed in a lump and excessively supplied to the subsequent process. In order to solve such a problem, it is preferable to appropriately adjust the state of the article conveyed on the feeder pan of the linear feeder according to the article.

  Accordingly, the present invention has been made to solve the above-described problems, and includes a combination weigher that includes a feeder pan and a vibrator for vibrating the feeder pan, and conveys articles on the feeder pan. It is an object of the present invention to provide a technique for adjusting the state of conveyance of an article on the feeder pan.

The article conveying device of the combination weigher of the present invention comprises a feeder pan and a vibrator for vibrating the feeder pan, and the article conveying device of the combination weigher conveys the article on the feeder pan.
The feeder pan has a conveyance surface composed of a substantially planar conveyance surface extending in the conveyance direction of the article, and two wall surfaces standing along both sides of the conveyance surface,
The said conveyance surface has 1 or more site | parts with a high friction coefficient compared with the other site | part of the said conveyance surface in the said conveyance direction middle part of one wall surface among the said two wall surfaces .

According to the article conveying device of the combination weigher having the above-described configuration, the article conveying state on the feeder pan is suitable for the article using the portions having different friction coefficients provided on the conveying surface of the feeder pan. Can be adjusted to the state. Specifically, when a long article conveyed by a feeder pan is in contact with a portion having a high coefficient of friction when the end of the component is in contact with a portion having a high friction coefficient, the long article is moved downstream in the conveying direction. It rotates and is corrected to a posture in which the longitudinal direction is substantially parallel to the transport direction. In this way, the long articles conveyed by the feeder pan can be regularly aligned. Furthermore, when the long article is conveyed in a posture in which the long direction is substantially parallel to the conveyance direction, it is possible to prevent the bridge of the article from being generated.

In the article transport apparatus of the combination weigher, it is preferable that a protrusion projecting from the transport surface is provided on the transport surface. More preferably, the protrusion is provided at a central portion in the width direction of the transport surface at the same position in the transport direction as the portion having the high friction coefficient. As a result, the long article conveyed by the feeder pan contacts the protrusion and rotates around the protrusion, and is corrected to a posture in which the long direction is substantially parallel to the conveyance direction. Therefore, in addition to the effect | action of the site | part from which the friction coefficient of a conveyance surface differs, the elongate articles conveyed with a feeder pan can be aligned regularly more efficiently.

  In the article transport apparatus of the combination weigher, the vibrator is preferably configured to vibrate the feeder pan so as to have an acceleration component in the transport direction and the upward direction.

  The present invention has the following effects.

  According to the present invention, in an article conveying apparatus of a combination weigher that includes a feeder pan and a vibrator that vibrates the feeder pan, and conveys the article on the feeder pan, the conveyance state of the article on the feeder pan Can be adjusted to a suitable state in accordance with the article by using a portion having a different friction coefficient provided on the conveying surface of the feeder pan.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference symbols throughout the drawings, and redundant description thereof is omitted.

(Embodiment 1)
[Schematic configuration of combination scale 99]
First, a schematic configuration of the combination weigher 99 according to Embodiment 1 of the present invention will be described. FIG. 1 is a diagram illustrating a schematic configuration of a combination weigher according to Embodiment 1 of the present invention.

  As shown in FIG. 1, a combination weigher 99 includes a supply device 1 that supplies an article received from the outside (hereinafter also referred to as an object to be weighed) while adjusting the amount thereof, and a plurality of weighing hoppers that perform combination weighing of the article. 8, a dispersion feeder 30, a plurality of linear feeders 50 and a plurality of supply hoppers 7 for conveying articles supplied from the supply device 1 to each weighing hopper 8, and a set for sending the combination-weighed articles to the next step such as packaging A chute 11 and a collective funnel 12 and a calculation controller 16 for controlling the combination scale 99 and performing combination calculation are provided.

  The supply device 1 includes a trough (a large and slender container) to which a vibration exciter 1a is attached, and articles are supplied to the trough from another device not shown. In the supply device 1, the articles on the trough are supplied to the dispersion feeder 30 by the vibration of the trough. However, the supply device 1 may be a belt conveyor including an endless belt and a plurality of containers arranged in a row on the endless belt.

  The dispersion feeder 30 is provided in the upper part of the combination balance 99 (above the collective chute 11). The dispersion feeder 30 includes a conical top cone 3 and a vibrator 4 that vibrates the top cone 3. The articles supplied from the supply device 1 onto the top cone 3 of the dispersion feeder 30 are radially dispersed while sliding down on the top cone 3 due to vibration. A level sensor 2 for detecting the amount of articles in the dispersion feeder 30 (specifically, the layer thickness of articles on the top cone 3 of the dispersion feeder 30) is provided above the dispersion feeder 30. ing. The level sensor 2 can be composed of, for example, an ultrasonic sensor.

  A plurality of rectilinear feeders 50 are arranged radially around the dispersion feeder 30. Each linear feeder 50 includes a feeder pan 5 and a vibrator 6 that vibrates the feeder pan 5. The article sent from the dispersion feeder 30 onto the feeder pan 5 of the linear feeder 50 is sent out to the supply hopper 7 by vibration.

  One supply hopper 7 is provided on the article delivery side of each linear feeder 50, and the plurality of supply hoppers 7 are arranged in an annular shape. Further, one weighing hopper 8 as a weighing container is provided below each supply hopper 7, and the plurality of weighing hoppers 8 are arranged in an annular shape. Each supply hopper 7 is provided with a gate 7a. When the gate 7a is opened, articles held by the supply hopper 7 are put into a weighing hopper 8 positioned below the supply hopper 7.

  Each weighing hopper 8 includes a weight sensor 9 such as a load cell in order to weigh the article in the weighing hopper 8. The measurement value (detection signal) of each weight sensor 9 is transmitted to the arithmetic controller 16.

  A collecting chute 11 is provided below the plurality of weighing hoppers 8, and a collecting funnel 12 is provided at the lower end of the collecting chute 11. Each weighing hopper 8 is provided with a gate 8a. When the gate 8a is opened, the articles held on the weighing hopper 8 slide down on the collecting chute 11 and are discharged from the collecting funnel 12, and to a packaging machine (not shown). It is thrown.

[Configuration of control system of combination scale 99]
Next, the configuration of the control system of the combination weigher 99 will be described. FIG. 2 is a functional block diagram of the operation controller of the combination weigher.

  As shown in FIG. 2, the arithmetic controller 16 is configured as a microprocessor centered on a CPU, and includes an arithmetic control unit 22 incorporating a CPU, a storage unit 23, an I / O circuit 18, an A / O circuit, and the like. A D conversion circuit 13, a gate drive circuit 14, and a vibration control circuit 15 are provided. The storage unit 23 includes a ROM that stores a processing program including an operation program and is used as a work area, and a RAM that temporarily stores data. In the arithmetic controller 16, the arithmetic control unit 22 reads out and executes data and programs stored in the storage unit 23, thereby exhibiting arithmetic functions and control functions.

  The I / O circuit 18 is connected to the level sensor 2, and a detection signal from the level sensor 2 is input to the arithmetic control unit 22 via the I / O circuit 18. The A / D conversion circuit 13 is connected to the weight sensor 9, and a detection signal from the weight sensor 9 is converted into a detection value via the A / D conversion circuit 13 and input to the arithmetic control unit 22. The

  The gate drive circuit 14 is connected to the supply hopper 7 and the weighing hopper 8 so that signals can be transmitted. The gate drive circuit 14 is configured to receive a signal from the arithmetic control unit 22 and transmit the signal to the supply hopper 7 and the weighing hopper 8. Further, the vibration control circuit 15 is connected to each of the vibrators 1a, 4 and 6 of the supply device 1, the distributed feeder 30 and the straight feeder 50 so as to be able to transmit signals. The vibration control circuit 15 is configured to receive signals from the arithmetic control unit 22 and transmit signals to the vibrators 1 a, 4, and 6 of the supply device 1, the dispersion feeder 30, and the linear feeder 50. ing.

  Further, an operation setting display 17 which is a user interface of the combination weigher 99 is connected to the operation control unit 22 of the operation controller 16 so that information can be transmitted and received between them. The operation setting indicator 17 is a touch panel type input unit for inputting operations and setting conditions related to the operation of the combination weigher 99 to the operation control unit 22 and an operation screen of the combination weigher 99 in response to an output from the operation control unit 22. And a display unit (screen) for displaying information on the combination balance 99 such as the operating state.

  In the present embodiment, the arithmetic controller 16 means not only a single arithmetic controller but also an arithmetic controller group including a plurality of arithmetic controllers. Therefore, the arithmetic controller 16 may be composed of a single arithmetic controller, or may be composed of a plurality of arithmetic controllers that are arranged in a distributed manner and controlled in cooperation.

[Operation of combination scale 99]
The operation of the combination scale 99 configured as described above will be described. The operation control unit 22 of the operation controller 16 of the combination weigher 99 executes the operation program stored in the storage unit 23 to control the operation of the combination weigher 99 and perform the combination operation. Parameters such as combination target weight values and operating speed conditions are input in advance from the operation setting display 17 to the arithmetic control unit 22 of the arithmetic control unit 16 and stored in the storage unit 23. The data is read from the storage unit 23 as necessary.

  When starting the weighing operation, the arithmetic control unit 22 of the arithmetic controller 16 first operates the vibrator 1 a of the supply device 1, the vibrator 4 of the dispersion feeder 30, and the vibrator 6 of the linear feeder 50. As described above, the control is performed via the vibration control circuit 15. As a result, the articles supplied from the supply device 1 onto the dispersion feeder 30 are distributed in the circumferential direction from the dispersion feeder 30 and fed to the supply hoppers 7 through the linearly-advanced feeders 50 arranged radially. At this time, the arithmetic controller 16 detects the layer thickness of the article on the dispersion feeder 30 by the level sensor 2 via the I / O circuit 18, and operates the supply device 1 when the quantity of the article becomes smaller than a predetermined amount. By doing so, a predetermined amount or more of articles are constantly supplied onto the dispersion feeder 30.

  Subsequently, the arithmetic controller 16 detects that the weighing hopper 8 is empty, and controls the gate 7 a of the supply hopper 7 to be opened via the gate drive circuit 14. As a result, the article is fed from the supply hopper 7 to the weighing hopper 8. When the article is put into the weighing hopper 8, the arithmetic controller 16 detects the measurement value (weight of the article held in each weighing hopper 8) by the weight sensor 9 via the A / D conversion circuit 13.

  The calculation controller 16 performs a combination calculation based on the weight of the articles held in the plurality of weighing hoppers 8. In this combination calculation, one combination in which the total weight value of the articles is within a predetermined weight range (allowable weight range with respect to the target weight) is obtained from the plurality of weighing hoppers 8 and the article is released. A combination of the power weighing hoppers 8 is selected.

  Then, when a discharge permission signal is input from the packaging machine, the calculation controller 16 opens the gate 8a of the weighing hopper 8 selected for the combination obtained by the combination calculation via the gate drive circuit 14, and removes the article. While discharging onto the collecting chute 11, a discharge completion signal is output to a packaging machine (not shown). The articles are collected on the collective chute 11 by the sliding collective funnel 12, discharged from the combination weigher 99, and put into a packaging machine (not shown). Through the above flow, an article in a predetermined weight range weighed in combination by the combination weigher 99 is put into a packaging machine (not shown). In the packaging machine, an operation such as a sealing operation is performed based on the input timing of a discharge completion signal from the combination weigher 99. Is done.

[Linear feeder structure]
Here, the structure of the linear feeder 50 will be described in detail.

  As shown in FIG. 1, the rectilinear feeder 50 is an article conveying device that includes a feeder pan 5 and a vibrator 6 that vibrates the feeder pan 5 and conveys articles on the feeder pan 5. The feeder pan 5 is supported on the upper part of the vibrator 6 by an attachment piece. The vibrator 6 is of an electromagnetic vibration type and includes an electromagnet composed of a stator and a rotor, and the vibration of the electromagnet caused by the electromagnetic force wave generated by switching on / off the energization of the electromagnet is a feeder pan. 5 is transmitted to vibrate the feeder pan 5. The vibrator 6 is configured to vibrate the feeder pan 5 so as to have an acceleration component in the transport direction and the upward direction, and the article is transported in the transport direction by the vibration of the feeder pan 5.

[Feeder bread structure]
Subsequently, the structure of the feeder pan according to the present embodiment will be described in detail. 3A and 3B are diagrams showing a feeder pan according to the first embodiment, where FIG. 3A is a plan view, FIG. 3B is a cross-sectional view taken along line IIIB-IIIB in FIG. FIG. In FIG. 3, the portions indicated by sanitization are portions having different surface friction coefficients.

  As shown in FIG. 3, the feeder pan 5 includes a transport surface 51 and wall surfaces 52 and 53 that stand along both sides of the transport surface 51, and is formed in a generally sector shape in plan view as a whole.

  The conveying surface 51 of the feeder pan 5 is an upper surface of a bottom plate that extends in the radial direction about the conical axis of the conical top cone 3 and is formed in a substantially planar shape. The base end 51 a of the transport surface 51 is located below the peripheral edge of the top cone 3 of the dispersion feeder 30, and the terminal end 51 b is located on the upper opening of the supply hopper 7. Hereinafter, the direction in which the conveyance surface 51 extends from the base end 51a to the terminal end 51b is referred to as the “conveyance direction” of the article.

  A proximal end wall 54 standing from the conveyance surface 51 is formed at the proximal end 51a of the conveyance surface 51 so that articles do not flow in the direction opposite to the conveyance direction. Moreover, from the middle part of the conveyance surface 51 in the conveyance direction to the end 51b, the substantially central part in the width direction of the conveyance surface 51 is continuously lower than the side part, and the article conveyed on the conveyance surface 51 is terminated. As it goes to 51b, it is made to gather in the substantially center part of the width direction of the conveyance surface 51. FIG.

  The transport surface 51 having the above-described shape forms the lowermost stage of the feeder pan 5. The conveyance surface 51 is provided with an inclination that goes downstream in the conveyance direction. Due to the inclination and the vibration applied by the vibration exciter 6, the article that has dropped to the base end 51a side of the conveyance surface 51 is terminated. It moves on the conveyance surface 51 toward the 51b side.

  Further, the wall surfaces 52 and 53 of the feeder pan 5 are inner side surfaces of the side walls that stand along both sides of the bottom plate, and end sides in a direction substantially orthogonal to the conveying direction of the conveying surface 51 are defined as lower ends 52a and 53a, respectively. It is a standing surface. The wall surfaces 52 and 53 and the conveying surface 51 form a “conveying surface” having a substantially box-shaped (concave) cross section in a direction substantially orthogonal to the conveying direction, and articles are conveyed while contacting the conveying surface. Is done.

  Of the two wall surfaces 52, 53 of the feeder pan 5, one wall surface 52 has an upper end 52 b on the upstream side in the transport direction extending to the side opposite to the transport surface 51 and substantially orthogonal to the transport direction. It is bent so that the cross section in the direction is a mountain. This is referred to as “overlapping part” for convenience. In the feeder pans 5 and 5 disposed in the combination balance 99, the overlapping portion is a portion that overlaps the upper end 53b of the other wall surface 53 of the adjacent feeder pan 5 in a plan view. In the feeder pans 5, 5 arranged adjacent to each other, the feeder pans 5, 5 vibrate between the overlapping portion provided at the upper end 52 b of the one wall surface 52 and the upper end 53 b of the other wall surface 53. Even so, they are separated so as not to interfere.

  In the feeder pan 5 having the above-described shape, the conveying surface of one wall surface 53 of the two wall surfaces 52 and 53 of the feeder pan 5 has one or a plurality of portions having different friction coefficients. For convenience, the part having a different friction coefficient is referred to as “different friction part 55”. In the feeder pan 5 shown in FIG. 3, the different friction site 55 is provided from the lower end 53 a to the upper end 53 b of the wall surface 53 in the middle of the conveyance direction in one wall surface 53 of the feeder pan 5.

  The different friction portion 55 is a portion having a higher friction coefficient than other portions, that is, a portion having a large friction, among the conveyance surfaces including the conveyance surface 51 and the wall surfaces 52 and 53 of the feeder pan 5. As described above, in order to increase the friction coefficient of the different friction portion 55 as compared with others, for example, the surface of the different friction portion 55 is an uneven surface (rough surface) formed by embossing or the like. A resin sheet can be attached to the surface of the sheet. Alternatively, it is also possible to make the friction coefficient of the different friction portion 55 higher than that of the other by applying a fluororesin process to the conveying surface 51 of the feeder pan 5 and the different friction portions 55 on the surfaces of the wall surfaces 52 and 53. In addition, if the different friction site | part 55 is formed by sticking a resin-made sheet | seat, since the position and magnitude | size of the different friction site | part 55 can be changed suitably according to the articles | goods conveyed with the feeder pan 5, it is desirable. .

  Next, the flow of articles supplied to the feeder pan 5 will be described. The article dropped from the dispersion feeder 30 to the base end 51a side of the conveying surface 51 of the feeder pan 5 moves in the conveying direction on the conveying surface 51 due to the inclination and vibration of the feeder pan 5. In the following, as shown in FIG. 3A, an article conveyed by the feeder pan 5 is a long article (for example, a rod-like body) having a long direction and a short direction, and the long direction The flow of articles in the feeder pan 5 when the dimension is larger than the width of the conveyance surface 51 will be described. In the following, when the short direction of the long article is substantially parallel to the transport direction, it is referred to as “lateral orientation”, and when the long direction of the long article is substantially parallel to the transport direction, “vertical orientation”. It is assumed that there is.

  When the long article is supplied to the feeder pan 5 in the horizontal orientation, the long article is longer than the width of the conveyance surface 51, so that the long article is bridged between the wall surface 52 and the wall surface 53. . When the long article moves in the conveying direction while being in the horizontal orientation due to the vibration of the feeder pan 5, one end of the long article eventually comes into contact with the different friction portion 55, and the movement in the conveying direction is suppressed. Since the long article tends to move further in the conveyance direction due to vibration, the other end of the long article that is not subjected to friction rotates in the conveyance direction around one end that is in contact with the different friction portion 55. The article is in a portrait orientation. Then, the long article in the vertical orientation moves to the downstream side in the transport direction while maintaining this posture, and falls from the terminal end 51 b of the transport surface 51. In addition, since the long article in the horizontal posture is bridged between the wall surface 52 and the wall surface 53, sufficient vibration cannot be obtained, and thus bridging is likely to occur. Since sufficient vibration can be obtained in contact with the surface 51, the bridge is eliminated, and further, the generation of the bridge can be suppressed.

  On the other hand, when the long article is supplied to the feeder pan 5 in the vertical orientation, it moves in the conveyance direction while maintaining the posture and falls from the terminal end 51 b of the conveyance surface 51. Even if the long article tries to rotate during movement, the article is corrected to the vertical orientation again by contacting the wall surfaces 52 and 53 and moves in the conveying direction.

  In addition, when the long article is supplied to the feeder pan 5 in a posture in which one end portion is located downstream of the other end portion in the transport direction, while the long article moves to the downstream side in the transport direction due to vibration. It is corrected to a vertical orientation starting from one end located on the downstream side, dropped from the terminal end 51 b of the transport surface 51, and put into the supply hopper 7. Note that, when supplied in this way, one end of the long article may come into contact with the different friction portion 55, but at this time, as in the case where it is supplied to the feeder pan 5 in the above-mentioned lateral orientation, the long article rotates. Then, it moves in the vertical direction and moves in the conveyance direction, and falls from the end 51 b of the conveyance surface 51.

  As described above, all the long articles conveyed by the feeder pan 5 are in the vertical orientation, fall from the terminal end 51 b of the conveyance surface 51 and are put into the supply hopper 7. That is, the long articles are regularly arranged in the vertical orientation by the feeder pan 5 and are put into the supply hopper 7.

  In addition, the position of the different friction site | part 55 provided in the conveyance surface of the feeder pan 5 is not limited above.

4A and 4B are views showing a feeder pan according to Reference Example 1 , in which FIG. 4A is a plan view, FIG. 4B is a sectional view taken along the line IVB-IVB in FIG. FIG. For example, as shown in FIG. 4, the different friction portion 55 provided on the conveyance surface of the feeder pan 5 is an upper and lower middle portion of the wall surface 53 on one wall surface 53 of the feeder pan 5 on the downstream side from the middle portion in the conveyance direction. To the upper end 53b.

5A and 5B are views showing a feeder pan according to Reference Example 2 , wherein FIG. 5A is a plan view, FIG. 5B is a cross-sectional view taken along the line VB-VB in FIG. FIG. For example, as shown in FIG. 5, the different friction portion 55 provided on the conveyance surface of the feeder pan 5 is provided on the entire surface from the upstream end to the downstream end in the conveyance direction of one wall surface 53 of the feeder pan 5. Also good. Or the different friction site | part 55 provided in the conveyance surface of the feeder pan 5 is provided in the lower end 53a half or the upper end 53b side half from the conveyance direction upstream end to the downstream end of one wall surface 53 of the feeder pan 5. May be.

  As in the feeder pan 5 shown in FIGS. 4 and 5, the friction coefficient of the surface of at least a part of one wall surface 53 of the two wall surfaces 52 and 53 of the feeder pan 5 is different from the remaining portion of the feeder pan 5. 3, the long articles conveyed by the feeder pan 5 are all in the vertical orientation and fall from the terminal end 51 b of the conveying surface 51, as in the case of the feeder pan 5 shown in FIG. 3. It is put into the supply hopper 7.

It is more desirable to provide the feeder pan 5 with a shape for forcibly rotating the long article in addition to the different friction portion 55. Figure 6 is a diagram showing a first modification of the feeder pan according to the first embodiment, (A) is a plan view, (B) is VIB-VIB cross-sectional view taken in (A), (C) is (A FIG. The feeder pan 5 shown in FIG. 6 is provided with a protrusion 56 that protrudes from the conveyance surface 51 at the same position as the different friction portion 55 in the conveyance direction or at a substantially central portion in the width direction of the conveyance surface 51 on the downstream side in the conveyance direction. Yes.

  If the article falls to the feeder pan 5 in a lateral orientation or an attitude in which one end is located downstream of the other end in the conveyance direction, the article will contact the projection 56 while moving in the conveyance direction. In contact therewith, the article rotates around the projection 56 to assume a downward posture, moves in the conveyance direction while maintaining this posture, and falls from the end 51b of the conveyance surface 51. As described above, in the feeder pan 5 shown in FIG. 6, the projection 56 also acts to correct the article in the vertical orientation in addition to the different friction portion 55, so that the long article conveyed by the feeder pan 5 is It will be corrected to the vertical orientation more reliably.

As described above, in the linear feeder 50 according to the present reference example , one or a plurality of portions having different friction coefficients are provided on the transfer surface of the feeder pan 5, and the conveyance state of the articles is changed using the portions having different friction coefficients. It is adjusted to a suitable state according to the situation. In particular, when the article conveyed by the feeder pan 5 is a long article, the different friction having a higher friction coefficient than the other part of the conveying surface is formed on one wall surface 53 of the two wall surfaces of the feeder pan 5. A portion 55 is provided. As a result, when the end of the long article conveyed by the feeder pan 5 comes into contact with the different friction portion 55, the long article rotates around the contacting end by the feeder pan vibration to the downstream side in the conveying direction. The posture in which the longitudinal direction is substantially parallel to the conveying direction is corrected. In this way, the long articles conveyed by the feeder pan 5 are regularly aligned, and the bridge of the articles on the feeder pan 5 is prevented from occurring.

( Reference Example 3 )
Next, a combination weigher according to Reference Example 3 will be described. The combination weigher according to the reference example 3 has the same structure as the combination weigher according to the first embodiment described above, except for the structure of the feeder pan 5 of the linear feeder 50. Therefore, in the following, only the structure of the feeder pan will be described, and description of redundant portions will be omitted.

[Feeder bread structure]
Here, the structure of the feeder pan according to Reference Example 3 will be described in detail. FIG. 7 is a plan view showing a feeder pan according to Reference Example 3. FIG. As shown in FIG. 7, the feeder pan 5 is formed integrally with a conveyance surface 51 and wall surfaces 52 and 53 erected along both sides of the conveyance surface 51, and has a substantially fan shape in plan view as a whole. ing.

  The conveying surface 51 of the feeder pan 5 is formed in a flat surface extending in the radial direction with the conical axis of the conical top cone 3 as a substantial center, and forms the lowermost stage of the feeder pan 5. The base end 51 a of the transport surface 51 is located below the peripheral edge of the top cone 3 of the dispersion feeder 30, and the terminal end 51 b is located on the upper opening of the supply hopper 7. The conveyance surface 51 is provided with an inclination that goes downstream in the conveyance direction. Due to the inclination and the vibration applied by the vibration exciter 6, the article that has dropped to the base end 51a side of the conveyance surface 51 is terminated. It moves on the conveyance surface 51 toward the 51b side.

  The wall surfaces 52 and 53 of the feeder pan 5 are surfaces that stand up with the edges in the direction substantially orthogonal to the conveying direction of the conveying surface 51 as lower ends 52 a and 53 a, respectively, and are provided along both sides of the conveying surface 51. ing. The wall surfaces 52 and 53 and the transport surface 51 form a transport surface having a substantially box-shaped cross section in a direction substantially orthogonal to the transport direction. The conveyance surface is a surface on which an article conveyed by the feeder pan 5 moves while contacting.

In the feeder pan 5 having the above-mentioned shape, on the base end 51a side of the transport surface 51, the supply point where the article falls from the dispersion feeder 30 and the surface in the vicinity thereof are different in friction coefficient from the other transport surfaces of the feeder pan 5. It is a different friction part 55 ". The different friction portion 55 is a portion having a lower friction coefficient than other portions, that is, a portion where the friction is small, on the conveying surface including the conveying surface 51 and the wall surfaces 52 and 53 of the feeder pan 5. As described above, in order to reduce the friction coefficient of the different friction portion 55 as compared with other conveying surfaces, for example, the surface of the different friction portion 55 is subjected to fluororesin processing or the surface of the different friction portion 55 is polished. Can be. Alternatively, the conveying surface other than the different friction portion 55 of the feeder pan 5 is roughened by embossing or the like, or a resin sheet is attached, so that the friction coefficient of the different friction portion 55 is different from that of the other conveying surface. It can also be lowered in comparison.

  Next, the flow of articles supplied to the feeder pan 5 will be described. Articles that have fallen from the dispersion feeder 30 to the different friction part 55 provided on the base end 51a side of the conveying surface 51 of the feeder pan 5 move in the conveying direction on the conveying surface 51 due to the inclination and vibration of the feeder pan 5. To do. At this time, since the friction coefficient of the different friction portion 55 is lower than the others, the article slides on the different friction portion 55 but quickly moves to the downstream side in the conveying direction although it receives some impact due to dropping. .

As described above, in the feeder pan 5 of the rectilinear feeder 50 according to this reference example , the different friction portion 55 having a low friction coefficient on the transport surface is provided at the upstream end in the transport direction of the transport surface 51 and at the article supply point. Thus, the article supplied to the feeder pan 5 is prevented from stagnating on the base end 51a side of the transport surface 51, and can be quickly moved downstream in the transport direction.

( Reference Example 4 )
Next, a combination weigher according to Reference Example 4 will be described. The combination weigher according to the reference example 4 has the same structure as the combination weigher according to the first embodiment described above, except for the structure of the feeder pan 5 of the linear feeder 50. Therefore, in the following, only the structure of the feeder pan will be described, and description of redundant portions will be omitted.

[Feeder bread structure]
Here, the structure of the feeder pan according to Reference Example 4 will be described in detail. FIG. 8 is a plan view showing a feeder pan according to Reference Example 4. FIG. As shown in FIG. 8, the feeder pan 5 is formed integrally with a conveyance surface 51 and wall surfaces 52, 53 standing along both sides of the conveyance surface 51, and has a substantially fan shape in plan view as a whole. ing.

  The conveying surface 51 of the feeder pan 5 is formed in a flat surface extending in the radial direction with the conical axis of the conical top cone 3 as a substantial center, and forms the lowermost stage of the feeder pan 5. The base end 51 a of the transport surface 51 is located below the peripheral edge of the top cone 3 of the dispersion feeder 30, and the terminal end 51 b is located on the upper opening of the supply hopper 7. The conveyance surface 51 is provided with an inclination that goes downstream in the conveyance direction. Due to the inclination and the vibration applied by the vibration exciter 6, the article that has dropped to the base end 51a side of the conveyance surface 51 is terminated. It moves on the conveyance surface 51 toward the 51b side.

  The wall surfaces 52 and 53 of the feeder pan 5 are surfaces that stand up with the edges in the direction substantially orthogonal to the conveying direction of the conveying surface 51 as lower ends 52 a and 53 a, respectively, and are provided along both sides of the conveying surface 51. ing. The wall surfaces 52 and 53 and the transport surface 51 form a transport surface having a substantially box-shaped cross section in a direction substantially orthogonal to the transport direction. The conveyance surface is a surface on which an article conveyed by the feeder pan 5 moves while contacting.

  On the conveyance surface of the feeder pan 5 having the above-described shape, a “different friction part 55” having a surface friction coefficient different from the others is provided in the conveyance direction halfway portion of the conveyance surface 51. The different friction portion 55 is a portion having a higher friction coefficient than other portions, that is, a portion where the friction is large, on the conveying surface including the conveying surface 51 and the wall surfaces 52 and 53 of the feeder pan 5. Thus, in order to increase the friction coefficient of the different friction portion 55 as compared with other portions of the conveying surface, for example, the surface of the different friction portion 55 is an uneven surface (rough surface) formed by embossing or the like. A resin sheet can be attached to the surface of the different friction portion 55. Alternatively, the conveying surface of the feeder pan 5 other than the different friction portion 55 can be subjected to fluororesin processing so that the friction coefficient of the different friction portion 55 is higher than that of other portions of the conveying surface.

  Next, the flow of articles supplied to the feeder pan 5 will be described. Articles dropped from the dispersion feeder 30 to the base end 51a side of the conveying surface 51 of the feeder pan 5 move on the conveying surface 51 in the conveying direction due to the inclination and vibration of the feeder pan 5. Eventually, when the article reaches the different friction part 55, the article in contact with the different friction part 55 receives friction and receives a braking force. However, an article that is not in contact with the different friction part 55, such as being overlaid on an article that is in contact with the different friction part 55, even if it is on the different friction part 55, maintains the moving speed. Move in the transport direction. As a result, when the articles supplied to the feeder pan 5 are vertically overlapped, the articles that are superimposed upward when passing through the different friction portion 55 first move in the transport direction, and the articles overlap vertically. Will collapse.

As described above, in the feeder pan 5 of the rectilinear feeder 50 according to the present reference example , the different friction portion 55 having a high friction coefficient on the conveyance surface is provided in the middle portion of the conveyance surface 51 in the conveyance direction. A braking force acts on the articles conveyed by contact, and a plurality of articles conveyed in a lump can be dispersed to convey the articles more uniformly. Thereby, it can contribute to stabilization of the conveyance amount of the articles | goods by the linear feeder 50. FIG.

( Reference Example 5 )
Next, a combination weigher according to Reference Example 5 will be described. The combination weigher according to the reference example 5 has the same structure as the combination weigher according to the first embodiment described above, except for the structure of the feeder pan 5 of the linear feeder 50. Therefore, in the following, only the structure of the feeder pan will be described, and description of redundant portions will be omitted.

[Feeder bread structure]
Here, the structure of the feeder pan according to Reference Example 5 will be described in detail. FIG. 9 is a plan view showing a feeder pan according to Reference Example 5. FIG. As shown in FIG. 9, the feeder pan 5 is formed integrally with a conveyance surface 51 and wall surfaces 52 and 53 erected along both sides of the conveyance surface 51, and has a substantially fan shape in plan view as a whole. ing.

  The conveying surface 51 of the feeder pan 5 is formed in a flat surface extending in the radial direction with the conical axis of the conical top cone 3 as a substantial center, and forms the lowermost stage of the feeder pan 5. The base end 51 a of the transport surface 51 is located below the peripheral edge of the top cone 3 of the dispersion feeder 30, and the terminal end 51 b is located on the upper opening of the supply hopper 7. The conveyance surface 51 is provided with an inclination that goes downstream in the conveyance direction. Due to the inclination and the vibration applied by the vibration exciter 6, the article that has dropped to the base end 51a side of the conveyance surface 51 is terminated. It moves on the conveyance surface 51 toward the 51b side.

  The wall surfaces 52 and 53 of the feeder pan 5 are surfaces that stand up with the edges in the direction substantially orthogonal to the conveying direction of the conveying surface 51 as lower ends 52 a and 53 a, respectively, and are provided along both sides of the conveying surface 51. ing. The wall surfaces 52 and 53 and the transport surface 51 form a transport surface having a substantially box-shaped cross section in a direction substantially orthogonal to the transport direction. The conveyance surface is a surface on which an article conveyed by the feeder pan 5 moves while contacting.

  On the conveyance surface of the feeder pan 5 having the above-described shape, a “different friction portion 55” having a friction coefficient different from other portions is provided on the end 51b side including the end 51b of the conveyance surface 51. The different friction portion 55 is a portion having a higher friction coefficient than other portions, that is, a portion where the friction is large, on the conveying surface including the conveying surface 51 and the wall surfaces 52 and 53 of the feeder pan 5. As described above, in order to increase the friction coefficient of the different friction portion 55 as compared with others, for example, the surface of the different friction portion 55 is an uneven surface (rough surface) formed by embossing or the like. A resin sheet can be attached to the surface of the sheet. Alternatively, the conveying surface of the feeder pan 5 excluding the different friction portion 55 can be subjected to fluororesin processing so that the friction coefficient of the different friction portion 55 is higher than that of other portions of the conveying surface.

  Next, the flow of articles supplied to the feeder pan 5 will be described. Articles dropped from the dispersion feeder 30 to the base end 51a side of the conveying surface 51 of the feeder pan 5 move on the conveying surface 51 in the conveying direction due to the inclination and vibration of the feeder pan 5. Eventually, when the article reaches the different friction portion 55, the article in contact with the different friction portion 55 receives a braking force due to friction. In other words, the article conveyed by the feeder pan 5 is braked to the momentum of movement near the end 51b. Thereby, it is possible to prevent the articles from falling as a lump from the terminal end 51 b of the conveying surface 51 of the feeder pan 5 and to stabilize the supply amount of the articles to the supply hopper 7.

As described above, in the feeder pan 5 of the rectilinear feeder 50 according to the present reference example , the different friction portion 55 having a high friction coefficient on the transfer surface is provided at the downstream end of the transfer surface 51 in the transfer direction. The braking force acts on the article due to the contact with the article, preventing the article from being carried out at once from the feeder pan, and can contribute to the stabilization of the conveyance amount of the article by the linear feeder 50.

  As described above, the article conveying device of the combination weigher according to the present invention can convey an article in a desired state by changing a friction coefficient of a part of a surface in contact with the article in the feeder pan. Yes, it can be widely applied to feeder pans regardless of the detailed shape such as the conveyance surface or wall surface.

It is a figure explaining schematic structure of the combination scale which concerns on Embodiment 1 of this invention. It is a functional block diagram of the calculation controller of a combination weigher. It is a figure which shows the feeder bread | pan concerning Embodiment 1, (A) is a top view, (B) is the IIIB-IIIB arrow sectional drawing in (A), (C) is the IIIC arrow view in (A). is there. It is a figure which shows the feeder bread | pan which concerns on the reference example 1 , (A) is a top view, (B) is IVB-IVB arrow sectional drawing in (A), (C) is an IVC arrow view in (A). . It is a figure which shows the feeder bread | pan which concerns on the reference example 2 , (A) is a top view, (B) is VB-VB arrow sectional drawing in (A), (C) is VC arrow view in (A). . Is a diagram showing a first modification of the feeder pan according to the first embodiment, (A) is a plan view, (B) is VIB-VIB cross-sectional view taken in (A), VIC in (C) is (A) It is an arrow view. It is a top view which shows the feeder bread | pan concerning the reference example 3. FIG. It is a top view which shows the feeder bread | pan concerning the reference example 4. FIG. It is a top view which shows the feeder bread | pan concerning the reference example 5. FIG.

DESCRIPTION OF SYMBOLS 1 Feeding device 2 Level sensor 3 Top cone 4 Vibrator 5 Feeder pan 6 Vibrator 7 Feeding hopper 8 Weighing hopper 9 Weight sensor 10 Collecting hopper 11 Collecting chute 12 Collecting funnel 16 Arithmetic controller 17 Operation setting display 30 Distributed feeder 50 Linear Feeder 51 Conveying Surface 52, 53 Wall Surface 54 Base End Wall 55 Different Friction Site 56 Projection 99 Combination Weighing

Claims (4)

In an article conveying device of a combination weigher comprising a feeder pan and a vibrator for vibrating the feeder pan to convey an article on the feeder pan,
The feeder pan has a conveyance surface composed of a substantially planar conveyance surface extending in the conveyance direction of the article, and two wall surfaces standing along both sides of the conveyance surface,
The transport surface has one or more portions having a higher friction coefficient than other portions of the transport surface in the transport direction midway portion of one of the two wall surfaces .
Commodity weigher conveying device. The transport surface is provided with a protrusion protruding from the transport surface.
The article conveying device for a combination weigher according to claim 1 . The article conveying device for a combination weigher according to claim 2, wherein the protrusion is provided at a central portion in the width direction of the conveying surface at the same position in the conveying direction as the portion having the high friction coefficient. The vibrator is configured to vibrate the feeder pan so as to have an acceleration component in the transport direction and upward direction.
The article conveyance apparatus of the combination scale as described in any one of Claims 1-3 .

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