JPH11326023A - Dispersion feeder for combination balance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combination balance which can surely supply an object of the desired amount to each measuring hopper even if bias and change in the supply state are generated when the object is supplied to a dispersion feeder in a combination balance, which can surely supply it to each measuring hopper by adjusting the layer thickness of the object on each rectilinear feeder, and which can make the layer thickness of the object uniform and has a high combination accuracy. SOLUTION: Layer thickness adjusting devices 6 are arranged to be positioned at the upper parts of conveyance trays 4 above a plurality of rectilinear feeders radially arranged, and are mounted to be vertically adjustable. Each layer thickness adjusting device 6 is composed of a mounting plate 6-7 for a layer thickness regulating plate, a layer thickness regulating plate 6-5, and a pressure plate 6-6 for regulating a layer thickness, and is constituted so as to move vertically on the outer periphery of a ring-shaped frame body 6-4 and to be mounted attachably and detachably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dispersing and supplying apparatus for appropriately supplying articles to a plurality of measuring tanks provided on a combination weigher.

[0002]

2. Description of the Related Art Various combinations of weighing values of articles weighed in a plurality of weighing tanks are selected to select a combination whose combination weight value is equal to or close to a target weight value, and the articles in the selected weighing tanks are respectively discharged. , And are packaged by a packaging machine provided at a later stage. At present, a combination weigher is widely known as a weighing device for performing such a weighing method. This type of weighing device obtains the target weight by combination, so accuracy by combination (called combination accuracy)
In addition to the weighing accuracy called for a general weigher, there is a difference in the supply amount due to the variation in the weight (hereinafter referred to as single weight) of each item, and the combination accuracy is affected. It is known that the combination accuracy is also influenced by the magnitude of the supply amount supplied at one time when the articles are supplied to the apparatus. For example, JP-A-4-3714
One such technique is disclosed in FIG.

In this technique, however, there is a vibration feeder called a circular umbrella-shaped dispersion feeder, and a cylindrical cylinder is provided substantially concentrically within a range on its receiving plate, and articles supplied from above into the cylinder are provided. Is distributed and supplied to the surroundings by the vibration of the dispersion feeder, and the level of the articles in the cylinder is constantly monitored by optoelectronic sensors provided above and below the cylinder. Is reached, the supply is stopped. Then, the cylindrical body is supported from the outside except for the dispersion feeder, and the gap between the receiving plate on the dispersion feeder and the lower end of the cylindrical body is adjusted by moving the supporting portion up and down, so that the article on the dispersion feeder can be moved. It is for adjusting the layer thickness. The articles are supplied to a plurality of rectilinear feeder conveyors (generally referred to as conveying trays) radially provided on the outer periphery of the dispersion feeder, and provided outside the plurality of rectilinear feeders in correspondence with the respective rectilinear feeders. It is a structure that is supplied to the measuring tank. Such a structure can be generally said to be a general structure in a current combination weigher.

However, since the layer thickness is adjusted in the umbrella-shaped portion of the dispersion feeder as described above, there is an advantage that the layer thickness can be changed all at once and the supply amount can be greatly increased or decreased. Supply is not completely uniform,
The feed is offset in any direction that is not the same layer thickness in all directions on the dispersion feeder. This is because the layer thickness of the articles conveyed by the supply conveyor is not constant, and there is no guarantee that the articles will be continuously supplied. That is, when the layer thickness of the article on the supply conveyor is large, the article is more likely to be supplied in the traveling direction of the supply conveyor, and when the layer thickness is smaller, the article is more likely to be supplied to the front. Therefore, the layer thickness distribution on the dispersion feeder is deviated, and the vibration of the dispersion feeder is uniform over the entire circumference, so that it is naturally supplied to a plurality of radially provided linear feeders in that state. The layer thickness on the straight feeder also varies. For this reason, it is necessary to secure a constant supply amount by adjusting the transport capacity individually in each of the straight-ahead feeders, or by adjusting the operation time of the straight-ahead feeder for supplying articles to the measuring tank. It requires a kind of feeder control. However, this always changes the operation program of the combination weigher, and there is a problem that the burden on the operator on the site is increased.

[0005] One problem is that, even if the supply condition from the supply conveyor is normal without any deviation, if each of the linear feeders has a variation in amplitude and the like and the transport capability is different from each other, each of the linear feeders may be different. It is required that the amount of articles supplied to the straight-ahead feeder be made different in consideration of the transport capacity of the feeder so that the amount of articles supplied to each weighing tank is made uniform. In addition, even if the transport capacity of each linear feeder is uniform, if the variation of the single weight is small and if the supply is too uniform to each measuring tank, the supply amount to each linear feeder must be intentionally made different. Occurs. However, in the prior art, since the layer thickness is regulated in the upper surface of the dispersion feeder, it flows in a uniform manner, and it is difficult to satisfy these requirements. Also, in the case of articles that are easily entangled or have an adhesive property, the amount of supply is similarly different for each measuring tank, so that a device that can be individually adjusted is required.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems. When articles are supplied to a dispersion feeder in a combination weigher, even if the supply state is shifted or fluctuated, each of the articles is supplied to a dispersing feeder. That the desired amount of articles can be reliably supplied to the weighing hoppers and that the layer thickness of the articles can be adjusted for each of the linear feeders, so that the desired amount of articles can be reliably supplied to each of the weighing hoppers. Can be. It is an object of the present invention to provide a combination weigher with high combination accuracy by stabilizing the layer thickness and dispersing and supplying with uniformity at all times.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first invention is a dispersion feeder for conveying articles to a peripheral portion by helical reciprocating vibration, and a conical-shaped feeder mounted on an upper portion of the dispersion feeder. An article comprising: a tray and a plurality of linear feeders that overlap with the outer periphery of the conical tray and are radially arranged at least at equal intervals, and that are configured by a transport tray that transports the articles by vibrating the linear feeder. A transport unit, a layer thickness adjusting device provided to be located on the transport tray of the plurality of linear feeders in the article transport unit, wherein the layer thickness adjusting device includes a ring-shaped frame and the ring. And a tightening band for fixing the layer thickness regulating plate to the ring-shaped frame body. A dispersion feeder for combination weigher was.

A second invention is a dispersing feeder which conveys articles to a peripheral portion by a spiral reciprocating motion, a conical receiving tray mounted on an upper portion of the dispersing feeder, and an outer periphery of the conical receiving tray overlapping with at least an equal interval. An article transport unit attached to a plurality of linear feeders radially arranged and configured by a transport tray for transporting articles by vibration of the linear feeder, and the plurality of linear feeders of the article transport unit. A layer thickness adjusting device provided so as to be located on a transport tray, wherein the layer thickness adjusting device constitutes a ring-shaped frame, and the ring-shaped frame constitutes the article transport unit. A position assigned on the circumference by a number corresponding to the transport tray of the plurality of linear feeders,
At the position allocated to the ring-shaped frame, a layer-thickness regulating plate using an elastic body and a layer-thickness regulating plate with both ends bent to stably follow the outer peripheral curved surface of the ring-shaped frame. It is characterized in that a plurality of layer-thickness adjusting tools, each of which is a set of the above-mentioned layer-thickness regulating plate holding plate, are vertically movable and are attached in a detachable structure. It is also a feature of the present invention that the means for attaching and fastening the layer thickness adjuster to each of the allocated positions of the ring-shaped frame is a single bolt and nut, respectively.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 shows a distributed feeder for a combination weigher
And FIG. (A) is a schematic sectional view of the dispersion supply device,
(B) is a side view of the layer thickness adjusting device, and (C) is a plan view of the dispersion supply device. The general configuration of the dispersion supply device is as follows: a vibrator 1 that performs a spiral reciprocating vibration, a conical tray 2 fixed to the upper part thereof, a plurality of linear feeders 3 arranged at least at equal intervals around the tray, and And a weighing unit 5 provided with a weighing tank for receiving the supply of articles from the transport tray at positions corresponding to the transport tray 4 and the transport tray, respectively, and at least a conical shape on the dispersion feeder. And a layer thickness adjusting device disposed concentrically with the center of the tray. FIG. 3 shows a state in which articles are being supplied to the dispersion supply apparatus. Now, when the articles 8 are supplied from the supply conveyor 9 onto the upper tray 2 of the dispersion feeder 1, the articles 8 are dispersed on the tray 2, and are dropped from the supply conveyor 9 to transport the straight-ahead feeder 3 located around the trays. Although it reaches the tray 4, it is further uniformly dispersed by the vibration of the dispersion feeder.

As described above, in the combination weigher, an approximately 1 / integer amount of the target weight is supplied to each measuring tank at one time and measured. The weighed values are variously combined to determine a combination equal to or close to the target weight by computer calculation. From this, the layer thickness and the transport capacity of the articles on the transport tray of the straight feeder and the layer thickness and the dispersion supply capacity on the tray of the dispersion feeder are determined by determining the target weight, and the layer thickness and the amplitude of the feeder are determined, respectively. Will also be decided. Therefore, as shown in FIG. 3, the layer thickness on the transport tray 4 is regulated by the layer thickness adjusting device 6, but it is desirable that the flow of articles on the transport tray is transported uniformly without interruption. Therefore, it is necessary to secure a layer thickness slightly larger than the layer thickness of the transport tray inside the layer thickness adjusting device. In other words, the quantity of articles on the dispersion feeder must always be as large as can be regulated by the layer thickness adjusting device.

FIG. 4 shows a first embodiment of the above-mentioned layer thickness adjusting device, in which 6-1 is a ring-shaped frame. Reference numeral 6-2 denotes a layer-thickness regulating plate, which is a belt-like sheet using an elastic body such as urethane rubber or synthetic rubber, and has a shape of a goodwill with slits (cuts) from one side. It is determined. In addition, the slit is deformed at the peak portion 4-1 of the transport tray and is divided into any one of the adjacent transport trays 4. In addition, portions other than the ridges 4-1 of the transport tray remain intact without being deformed and serve to regulate the layer thickness of articles. At this time, the layer thickness of the article is controlled by the layer thickness control plate 6-2.
This can be performed by increasing or decreasing the size of the gap between the lowermost end of the transfer tray 4 and the valley 4-2 of the transport tray 4. Reference numeral 6-3 denotes a tightening band for winding and fixing the layer thickness regulating plate 6-2 around the ring-shaped frame 6-1. Further, when adjusting the layer thickness over the entire transport tray 4, it is possible to change the fixing position of the ring-shaped frame attachment 7 up and down.

FIG. 5 shows a second embodiment of the above-mentioned layer thickness adjusting device. Reference numeral 6-4 denotes a ring-shaped frame. 6-5
Is a layer thickness regulating plate using an elastic sheet made of, for example, urethane rubber or synthetic rubber. Reference numeral 6-6 denotes a holding plate for the layer thickness regulating plate, and reference numeral 6-7 denotes a layer thickness regulating plate mounting plate having both ends bent. Reference numeral 6-8 denotes a mounting bolt, and reference numeral 6-9 denotes a fixing nut. The layer thickness regulating plate 6-5 and the holding plate 6
-6 and the layer thickness regulating plate 6-6-7 constitute one set to constitute a layer thickness adjusting tool 6-10, and a plurality of sets are prepared. FIG. 6 illustrates the order in which the layer thickness adjusters 6-10 are attached to the ring-shaped frame. In the figure, (A) is a view in which one of the plurality of layer thickness adjusters is removed from the ring-shaped frame, and (B) is a view in which the tool is attached and fixed to the ring-shaped frame. FIG. 5 shows the entire structure, but a ring-shaped frame 6 is shown.
In the case where the above-mentioned layer thickness adjusting tool 6-10 is attached to the circumference of -4, the circumference of the ring-shaped frame 6-4 is allocated at least according to the number corresponding to the transport trays 4 of the plurality of linear feeders 3. The set position is provided on the circumference, and the layer thickness adjuster is attached to that position. The layer thickness regulating plate 6-5 coincides with the corresponding valley portion 4-2 of the transport tray 4, and fits in the center of each transport tray. The layer thickness adjusting tool 6-10 including the layer thickness regulating plate includes a mounting bolt 6-8 and a fixing nut 6-6.
At 9, it is fixed to the ring-shaped frame. The feature of the layer thickness adjusting device according to the present embodiment is that the layer thickness can be adjusted for each transport tray, and each of the layer thickness adjusters can be moved at least up and down by setting the mounting hole near the center as an elongated hole. That is. Further, since the both ends of the layer thickness control plate mounting plate 6-7 are bent, it is easy to follow the outer periphery of the ring-shaped frame.
Even if it is attached with the bolts 6-8, it does not rotate independently. In order to uniformly adjust the layer thickness over the entire transport tray, it is possible to change the fixing position of the ring-shaped frame attachment 7 up and down.

[0013]

As described above, the dispersion feeding apparatus according to the first invention is located on the transport tray on the plurality of linear feeders radially arranged on the outer periphery of the conical tray attached to the upper part of the dispersion feeder. As described above, the layer thickness adjusting device is provided, so that even if the supply state of the articles supplied from the upper portion of the tray of the dispersion feeder is slightly shifted or fluctuated, the article is leveled on the straight-ahead feeder and a uniform layer thickness can be obtained. A desired quantity of articles can always be secured in each measuring tank. In addition, in the dispersion feeding apparatus according to the second aspect, since the layer thickness can be adjusted for each transport tray in addition to the above, even if the amplitude of the linear feeder is varied and the transport capacity is different from each other, the transport tray can be placed on the transport tray. Since the thickness of each layer can be individually adjusted, a desired amount of articles can always be secured in each measuring tank, and as a result, a combination weigher with high combination accuracy can be provided. Further, when the layer thickness adjusting tool is attached to the ring-shaped frame, since the means for fastening the layer thickness adjusting tool is a single bolt and nut, the number of parts and the number of processing steps can be reduced, and there is an effect that it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is an overall view showing a first embodiment of the present invention.

FIG. 2 is an overall view showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a state in which articles are being supplied in the present invention.

FIG. 4 is a diagram showing a first embodiment of the present invention.

FIG. 5 is a diagram showing a second embodiment of the present invention.

FIG. 6 is a detailed view of a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dispersion feeder 2 Conical tray 3 Straight feeder 4 Transport tray 5 Measuring part 6 Layer thickness adjusting device 7 Frame fixture 8 Article 9 Supply conveyor 10 Level sensor

Claims (3)

[Claims] 1. A dispersion feeder that conveys an article to a peripheral portion by a spiral reciprocating vibration, a conical tray attached to an upper portion of the dispersion feeder, and radially arranged at least at equal intervals with an overlap with an outer periphery of the tray. And a transport tray configured to transport articles by vibrating the linear feeder, and the transport tray of the plurality of linear feeders in the article transport section. A layer thickness adjustment device provided so as to be positioned, wherein the layer thickness adjustment device is attached along an outer periphery of the ring-shaped frame and the ring-shaped frame, and is provided for an article on the transport tray. A distributed feeder for a combination weigher, comprising: a layer thickness regulating plate made of an elastic body for regulating a layer thickness; and a tightening band for fixing the layer thickness regulating plate to the ring-shaped frame. . 2. A dispersion feeder that conveys articles to a peripheral portion by a spiral reciprocating vibration, a conical tray mounted on an upper portion of the dispersion feeder, and radially arranged at least at equal intervals with an overlap with an outer periphery of the tray. And a transport tray that is attached to a plurality of rectilinear feeders, and is configured by a transport tray that transports articles by vibrating the rectilinear feeder, and, among the article transport units, on the transport tray of the plurality of rectilinear feeders. Wherein the layer thickness adjusting device is a ring-shaped frame and the ring-shaped frame is a plurality of the linear feeders constituting the article transport unit. Positions assigned by numbers corresponding to the transport trays are provided on the circumference, and positions assigned to the pair of ring-shaped frames are stably along the outer peripheral curved surface of the ring-shaped frame. A plurality of layer thickness adjusters, each of which is a set of a layer thickness control plate mounting plate having both ends bent, a layer thickness control plate using an elastic body, and a pressing plate of the layer thickness control plate, can be moved at least in the vertical direction. Dispersion supply device for a combination weigher equipped with a layer thickness adjustment device, which is detachably attached to the device. 3. The means for removably attaching and fastening the layer thickness adjuster to each of the assigned positions of the ring-shaped frame body is a single bolt and a nut, respectively. 3. The dispersion supply device for a combination weigher according to item 1.