JP5300219B2 - Material feeder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prolong life by suppressing the wear of a hopper in a material feeder in which the side wall of the hopper is deformed (deflected) to prevent the material in the hopper from being bridged. <P>SOLUTION: This material feeder having the hopper 2 in which the material is contained is so formed that the side walls 2a, 2b of the hopper 2 are made of a flexible material, and a roller 4 deflects the side walls 2a, 2b by intermittently abutting on the side walls 2a, 2b of the hopper 2. Since the roller 14 in contact with the side walls 2a, 2b is rotated along the side walls 2a, 2b, the friction between the side walls 2a, 2b and the roller 14 is minimized, and the wear of the side walls 2a, 2b is hard to occur. Consequently, the hopper 2 can be used for a long period. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a material supply apparatus that supplies a material such as a granular material.

  There is a conventional material supply device that prevents a powder or granular material in a hopper from being bridged or ratholed. As shown in FIG. 7, the quantitative supply device disclosed in Patent Document 1 is formed with a hopper 2 in which a screw feeder 3 serving as a discharge screw is incorporated at the bottom portion from a material that is easily distorted, and on both sides of the hopper 2. A strain generator A that distorts the side wall is provided on the outer side, and both the side walls of the hopper 2 are distorted by the strain generator A so that the granular material 1 in the hopper 2 flows, and a bridge, a rathole, or the like. Preventing the occurrence of

The strain generator A fixes a central portion between the upper and lower edges of a plate-like rocking body 6 circumscribing the side walls 2a, 2b of the hopper 2 to each of the horizontal rotating shafts 5 arranged on both outer sides of the hopper 2. In addition, an eccentric mechanism 8 in which a link arm is fitted to an eccentric cam is connected to the tip of a projecting piece 7 whose end is fixed to the rotating shaft 5. And when the lower end part of one rocking body 6 protrudes, the upper end part of the other rocking body 6 protrudes (the upper end part of both rocking bodies 6 may protrude simultaneously), and the protruded end The part presses the side wall of the hopper 2 so as to be distorted.
Japanese Utility Model Publication No. 58-45234

  However, in the conventional quantitative supply device described above, the operation of pressing the upper end portion and the lower end portion of the oscillating body 6 against the hopper 2 formed of a material that easily generates distortion is repeated. A large frictional force is generated between the lower end portion and the hopper 2, and the hopper 2 is easily worn by this friction, and there is a problem that the life of the hopper 2 is short.

  An object of this invention is to provide the material supply apparatus which suppresses abrasion of a hopper and can prolong the lifetime in view of the said problem.

The present invention for solving the above problems is a material supply apparatus having a hopper which material is introduced, is formed of a material having at least a part of the side wall is flexible of the hopper, the hopper It comprises a flexible side wall with intermittent contact deflection generating device having a roller for deflecting the flexible side wall of the discharge screw built into the bottom of the hopper, the said roller, the axis of the roller The shaft body and the roller are rotatably supported with respect to a shaft body that supports the roller, and the shaft body and the roller are supported in a swinging or rotating posture .

According to the said structure, the flow of the material in a hopper can be promoted by bending a flexible side wall with a roller, and a bridge | bridging etc. can be prevented. Since the roller in contact with the flexible side wall rotates about the shaft along the flexible side wall, friction between the flexible side wall and the roller is minimized, and wear of the flexible side wall is reduced. Hard to happen. Therefore, the life of the hopper can be extended.

Further, the present invention is that further include a discharge screw built into the bottom of the hopper. In such a configuration, it is particularly convenient that a bridge or the like can be prevented.
Moreover, the mutually opposing side walls of the hopper have flexibility, and the bend generation device is flexible around a rotation axis extending along the side wall surface on both outer sides of the flexible side walls of the hopper. A supporting member that swings in a direction approaching and separating from the side wall may be provided, and at least one roller may be attached to each supporting member in a posture parallel to the rotation shaft.

In each support member, it is preferable that a plurality of rollers are attached to both sides of the rotation shaft. This is because bridges, ratholes, and the like can be effectively broken.
The deflection generating device connects the swinging arms fixed to the rotating shaft so that the roller attached to the upper end of one support member contacts one flexible side wall, and the other support member It is preferable to have a link mechanism that synchronizes the movement of the roller attached to the lower end with the other flexible side wall. This is because bridges, rat holes, and the like can be broken more effectively.

  The side walls facing each other of the hopper have flexibility, and the deflection generating device has a support member that rotates around a rotation axis extending along the side wall surface on both outer sides of the flexible side wall of the hopper. In each support member, a plurality of rollers are provided with a gap along the circumferential direction of the rotary shaft, and a distance capable of contacting and separating from the flexible side wall is provided between the support shaft and the rotary shaft. It may be attached.

  The plurality of rollers attached to each support member are preferably arranged so as to contact each other at different positions in the width direction of the flexible side wall of the hopper. This is because bridges, rat holes, and the like can be effectively broken.

The material supply device of the present invention can prevent the bridge, the rat hole, and the like by encouraging the flow of the material in the hopper by bending the flexible side wall of the hopper with a roller. Since the roller rotates around the shaft when contacting the flexible side wall, friction between the roller and the flexible side wall can be minimized, wear of the flexible side wall is less likely to occur, and the length of the hopper Life can be extended.

Hereinafter, embodiments of the invention will be described with reference to the drawings.
1A and 1B are a cross-sectional view and a partially cutaway side view showing a schematic overall configuration of a material supply apparatus according to an embodiment of the present invention, and FIGS. 2A and 2B are the same material supply apparatus. FIG. 3 is an enlarged plan view showing a part of the material supply apparatus.

  As shown in FIG. 1 to FIG. 3, this material supply device is called a loss-in-weight type powder particle quantitative supply device, and includes a hopper 2 into which the powder material 1 is charged and a bottom portion of the hopper 2. A screw feeder 3 that protrudes to the outside (or faces the outside), a driving means such as a driving motor 4 that drives the screw feeder 3, and a weighing unit W are provided. The granular material 1 is continuously supplied in a constant amount while detecting that the granular material 1 is discharged by the amount of the reduced weight.

  The side walls 2a and 2b facing each other of the hopper 2 are made of a flexible material, for example, polyurethane, and a bending generator 11 for bending the side walls 2a and 2b is provided.

  The deflection generating device 11 approaches and separates from the flexible side walls 2a and 2b around the rotating shaft 12 extending horizontally along the side wall surface on both outer sides of the flexible side walls 2a and 2b of the hopper 2. A frame member 13 that swings in a direction is provided, and a plurality of columnar rollers 14 are rotatably attached to the frame member 13 and mounted on both sides of the rotation shaft 12 in a posture parallel to the rotation shaft 12. ing.

  As a result, the roller 14 that swings integrally with the frame member 13 intermittently abuts against the side walls 2a and 2b, bends the side walls 2a and 2b, and promotes the flow of the granular material 1 in the hopper 2. Prevent bridging etc.

  Specifically, as shown in FIG. 2, a frame member 13 is integrally provided on each of the pair of rotating shafts 12 so as to extend obliquely upward and obliquely downward from the rotating shaft 12. A roller 14 is rotatably attached to the end. Further, the tip of the swing arm 15a fixed to the end of one (left side in the figure) of the rotating shaft 12 is connected to a rotor 17 having an eccentric shaft 16 via a connecting member 18, and the rotating shaft 12 The link member 19 is connected to the distal end of the interlocking arm 15b provided so as to extend upward from the end of the other end and the distal end of the interlocking arm 15c provided at the end of the other (right side in the figure) rotating shaft 12. It is connected.

  As a result, as shown in the drawing, the lower end portion of one frame member 13 protrudes and the roller 14 at the lower end portion contacts the side wall 2a of the hopper 1, and the upper end portion of the other frame member 13 protrudes. Thus, the operation of the roller 14 at the upper end contacting the side wall 2b of the hopper 1 is synchronized.

  According to the above configuration, the roller 14 comes into contact with the side walls 2a and 2b while protruding so as to draw an arc as the frame member 13 swings, that is, it does not hit the side walls 2a and 2b in the vertical direction. Since contact is made so as to slide in an oblique direction, the roller 14 rotates at the time of contact, and friction between the side walls 2a, 2b and the roller 14 is minimized. For this reason, even if such a contact operation is repeated, the side walls 2a and 2b are hardly worn, and the lifetime of the hopper 2 is remarkably increased as compared with the case where it is distorted by a conventional plate-like rocking body.

  Further, by adopting the above link mechanism, the side walls 2a and 2b of the hopper 2 are simultaneously bent by the roller 14, while the respective bending positions are different in the height direction of the hopper 2. The load applied to the powder body 1 is small, and the occurrence of bridges can be effectively prevented.

  That is, in the case of using the conventional eccentric mechanism, when the timing of both oscillators is shifted and only one side of the hopper 2 is distorted, the effect of breaking the bridge is small, and the occurrence of the bridge may not be prevented. According to the above configuration of the present invention, such a problem does not occur. Further, in the case where the conventional eccentric mechanism is used, when the upper ends of both oscillating bodies are protruded at the same time and both sides of the hopper 2 are distorted, it may act as a load for tightening the granular material 1. According to the present invention configuration, this can also be prevented.

  The number of rollers 14 arranged on both sides of the rotating shaft 12 is not particularly limited, and a plurality of rollers 14 may be arranged on both sides of the rotating shaft 12 as shown in FIGS. 4 (a) and 4 (b). Alternatively, although not shown, the number of rollers 14 may be different between one side of the rotating shaft 12 and the other side.

  1 to 3 show an example in which the lengths of the rollers 14 on both sides of the rotating shaft 12 are made different according to the shape of the side walls 2a and 2b of the hopper 2 (the lower part is narrowed). However, the length of each roller 14 may be the same, and may be longer or shorter than the width of the side walls 2a and 2b.

  5 (a) and 5 (b) show another embodiment of the present invention. In this material supply device, the deflection generating device 21 includes a pair of left and right rotating plates 22 centering on a rotating shaft 12 ′ extending horizontally along the side wall surfaces on both outer sides of the flexible side walls 2 a and 2 b of the hopper 2. The plurality of cylindrical rollers 14 are spaced apart from each other between the pair of rotating plates 22 along the circumferential direction of the rotating shaft 12 ', and the distance between the rotating plates 22 is in contact with and separated from the side walls 2a and 2b. The rotary shafts 12 ′ are rotatably attached to the rotary shaft 12 ′ in a posture parallel to the rotary shaft 12 ′. A plurality of rollers 14 between each pair of rotating plates 22 are arranged in a cylindrical shape around the rotating shaft 12 ′ at equiangular intervals. A chain mechanism 24 is also provided for transmitting a driving force to a disk 23 provided at an end of each rotating shaft 12 '.

  As a result, the plurality of rollers 14 rotated about the rotation shaft 12 ′ by the chain mechanism 24 intermittently contact the side walls 2 a, 2 b to bend the side walls 2 a, 2 b, and the granular material 1 in the hopper 2. It promotes flow and prevents bridges.

  Also with the above configuration, each of the plurality of rollers 14 arranged in a cylindrical shape contacts the side walls 2a and 2b while moving so as to draw an arc, thereby bending the side walls 2a and 2b. 14 presses the side walls 2a and 2b while rotating about its axis, so that friction between the side walls 2a and 2b and the roller 14 is minimized. For this reason, even if such a contact operation is repeated, the side walls 2a and 2b are hardly worn, and the lifetime of the hopper 2 is remarkably increased as compared with the case where it is distorted by a conventional plate-like rocking body.

Similarly to the above-described link mechanism according to the present invention, the side walls 2a and 2b of the hopper 2 can be simultaneously bent by the roller 14, while the bending positions (heights) can be made different.
Further, as a separate embodiment, as shown in FIGS. 6A and 6B, a roller 14 formed shorter than the width of the side walls 2a and 2b of the hopper 2 is shifted in phase (position in the length direction). For example, four rollers 14 each having a length of about ¼ of the width of the side walls 2 a and 2 b of the hopper 2 may be arranged around the rotation shaft 12 by 90 degrees.

  By doing so, the side walls 2a and 2b of the hopper 2 can be bent sequentially one by one, such as the front part, the center part, and the back part, so that the side walls 2a and 2b of the hopper 2 are wavy. Since it can be deformed, the arrangement of the roller 14 as shown in FIG. 5 allows the inner granular material 1 to flow more effectively than the side walls 2a and 2b can be deformed only in a straight line. And the occurrence of bridges and ratholes can be prevented even better.

  Each of the bending generators shown in FIGS. 5 and 6 is a simple drive system, so that the maintainability can be improved and the material cost and assembly cost can be reduced. Each bending generator shown in FIG. 6 only changes the length and arrangement of the rollers 14 as compared with the bending generator shown in FIG. 5, and the material cost can be reduced.

  In addition, although the material supply apparatus of each of the above embodiments has incorporated the screw feeder 3 at the bottom of the hopper 2, even if the hopper is provided with a cut gate hopper or a belt feeder on the outside, Similar effects can be obtained by providing various types of bending generators.

The figure which shows the schematic whole structure of the material supply apparatus of one Embodiment of this invention. Sectional drawing which expands and shows a part of material supply apparatus of FIG. FIG. 1 is an enlarged plan view showing a part of the material supply apparatus of FIG. The figure which shows the schematic whole structure of the material supply apparatus of other embodiment of this invention. The figure which shows the schematic whole structure of the material supply apparatus of further another embodiment of this invention. The figure which shows the schematic whole structure of the material supply apparatus of further another embodiment of this invention. The figure which shows the general | schematic whole structure of the conventional material supply apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Powder body 2 Hopper 3 Screw feeder
11 Deflection generator
12 Rotating axis
12 ′ axis of rotation
13 Frame member
14 Laura
21 Deflection generator
22 Rotating plate
24 Chain mechanism

Claims (3)

A material supply device including a hopper into which material is charged,
A bend generating device having a roller in which at least a part of the side wall of the hopper is formed of a material having flexibility, and is in contact with the flexible side wall of the hopper intermittently to bend the flexible side wall; A discharge screw incorporated in the bottom of the hopper,
The roller is rotatably supported with respect to a shaft body that is disposed in a shaft center portion of the roller and supports the roller,
The shaft body and the roller are supported in a swinging or rotating posture ,
The side walls facing each other of the hopper have flexibility, and the deflection generating device is formed on the flexible side wall centering on a rotation axis extending along the side wall surface on both outer sides of the flexible side wall of the hopper. Each of the support members has at least one roller attached in a posture parallel to the rotation shaft,
In each support member, a plurality of rollers are attached to both sides of the rotation shaft,
The deflection generating device connects the swinging arms fixed to the rotating shaft so that the roller attached to the upper end of one support member contacts one flexible side wall, and the other support member A material supply device comprising a link mechanism that synchronizes an operation in which a roller attached to a lower end contacts the other flexible side wall . A material supply device including a hopper into which material is charged,
A bend generating device having a roller in which at least a part of the side wall of the hopper is formed of a material having flexibility, and is in contact with the flexible side wall of the hopper intermittently to bend the flexible side wall; A discharge screw incorporated in the bottom of the hopper,
The roller is rotatably supported with respect to a shaft body that is disposed in a shaft center portion of the roller and supports the roller,
The shaft body and the roller are supported in a swinging or rotating posture ,
The side walls facing each other of the hopper have flexibility, and the deflection generating device has a support member that rotates around a rotation axis extending along the side wall surface on both outer sides of the flexible side wall of the hopper. In each support member, a plurality of rollers are provided with a gap along the circumferential direction of the rotary shaft, and a distance capable of contacting and separating from the flexible side wall is provided between the support shaft and the rotary shaft. A material supply device which is attached . 3. The material supply device according to claim 2 , wherein the plurality of rollers attached to each support member are arranged so as to contact each other at different positions in the width direction of the flexible side wall of the hopper.

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