JP2008284468A - Vibration deck and screening apparatus equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration deck capable of efficiently screening a screening object mixed with materials with large specific gravity difference or difficult to screen. <P>SOLUTION: The vibration deck is provided with a fixing part 2 fixing the deck to an apparatus body; a resonance spring rod 3 extended in the flow direction F of the screening object from the fixing part 2; a resonance weight 4 for adjusting amplitude of the resonance spring rod 3 at the end of the resonance spring rod 3; and screen fastening members 51, 54 for attaching screen mesh 6 at the end of the resonance weight 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vibration deck for sieving an object to be processed and a sieving device including the same.

  Conventionally, a sieving apparatus has been used to divide various objects to be processed, such as industrial waste, aggregate, and coal, into predetermined sizes. Generally, this sieving apparatus is provided with a sieve mesh having an opening of a predetermined size inclined or horizontally, and by vibrating the sieve mesh, an object to be treated flowing on the sieve mesh is passed through the sieve mesh. Items larger than the opening (opening) are discharged from the net, and small items are dropped under the net and sieved.

  In such a sieving apparatus, the sieving screen is fixed to the apparatus main body, all the sieving nets are uniformly vibrated with the same amplitude integrally with the apparatus main body, and the workpiece to be sent on the sieving net is as described above. Sieving. As the sieve mesh, generally, a woven mesh woven with a metal wire or a punched mesh in which a hole of a predetermined size is punched on almost the entire surface of a steel plate is used. Urethane nets using materials are also used (in the specification and claims documents, these nets are collectively referred to as “sieving nets”).

  As the sieving device, for example, the intermediate part of the sieve screen is supported from above or below by a stretchable supporter such as a spring so that the intermediate part is vibrated elastically while maintaining the flatness of the sieve screen during use. (For example, refer to Patent Document 1).

  In recent years, industrial waste has been actively recycled, and there are many sieving devices for sieving the waste. For example, as a sieve of a sieving device for separating earth and sand from industrial waste, a deck sheet is formed by forming a large number of openings in a rubber plate, and the deck sheet is fixed before and after the direction of treatment. However, there is one that attempts to effectively prevent clogging of processed products by vibrating the deck sheet (see, for example, Patent Document 2).

In order to prevent clogging, a synthetic resin tension rope is welded to the lower surface of the synthetic resin net body, and the synthetic resin tension rope is fixed to vibrate the net body (for example, (See Patent Document 3).
JP 2001-62400 A JP-A-8-299906 JP 2002-1220 A

  By the way, as the industrial waste to be recycled, for example, there is a waste mixed with materials of different specific gravities such as plastic, wood, concrete pieces such as building waste. And the industry trend is to recycle such waste by dividing it into each material.

  However, even if such waste is crushed by a crusher, concrete pieces with a large specific gravity can be easily crushed, but wood or plastic pieces with a low specific gravity are difficult to crush easily. Some waste is discharged from the crusher with the concrete pieces still attached. Therefore, such objects to be treated cannot be separated for each material by sieving after crushing, nor can they be separated by a magnetic separator such as a magnetic metal and a non-magnetic material, which makes recycling difficult. Yes.

  On the other hand, in the case of an object to be easily clogged with a sieve mesh like a clay-like object to be processed, it can be suppressed to some extent by vibrating the sieve mesh as in the above-mentioned patent document. In addition, since the degree of adhesion varies greatly depending on conditions such as the amount of moisture, it is difficult to suppress adhesion of an object to be treated with a sieve mesh that vibrates all sieve meshes uniformly with the same amplitude.

  Accordingly, the present invention provides a vibrating deck capable of efficiently sieving an object to be processed in which a material having a large specific gravity difference is mixed, or an object to be processed that is difficult to be screened, and a sieving device including the vibration deck. With the goal.

  In order to achieve the above object, the vibration deck of the present invention is a vibration deck for sieving an object to be processed with a predetermined size, a fixing part fixed to the apparatus main body, and an object to be processed from the fixing part. A resonating portion extending in the flow direction, a weight portion for adjusting the amplitude of the resonating portion at the end of the resonating portion, and a mesh attaching portion for attaching a sieve screen to the end of the resonating portion. Accordingly, the resonance part extending from the fixed part fixed to the apparatus main body can be caused to perform a predetermined resonance motion by the spring constant of the resonance part and the weight of the weight part. Therefore, the sieve attached to the end of the resonance part By vibrating the net with a predetermined amplitude, it is possible to efficiently screen light objects to be processed, objects to be easily clogged, and the like.

  Moreover, you may comprise the said weight part so that weight adjustment is possible. Thereby, the weight of the weight part can be adjusted to adjust the amplitude of the resonance part.

  Furthermore, the resonance part may be formed of a rod-shaped member, and the spring constant of the resonance part may be adjustable. As a method of adjusting the spring constant of the resonating part, for example, it can be adjusted by the cross-sectional shape, the number, the material, and the like. Thereby, the amplitude of the resonance part can be adjusted by adjusting the resonance part itself.

  Moreover, you may comprise the said resonance part so that the rigidity of an up-down direction may become smaller than the rigidity of a left-right direction. Thereby, it is possible to reliably vibrate in the vertical direction while suppressing the horizontal vibration of the resonance part extending in the flow direction of the workpiece from the fixed part.

  Furthermore, you may extend the said resonance part toward the flow direction upstream and downstream of the to-be-processed object from the said fixing | fixed part. Thereby, the resonance part extended from the fixed part to the upstream side and the downstream side can be vibrated together, and the whole sieve mesh can be vibrated more greatly.

  In addition, at least two of the above-described resonance parts are arranged in parallel in the flow direction of the workpiece, and the upstream network attachment part of the downstream sieve screen is attached to the downstream end of the resonance part of the upstream vibration deck. Also good. As a result, the upstream end of the downstream sieve screen is vibrated by the upstream resonance portion, so that the downstream sieve mesh can be vibrated with a larger amplitude, and more clogging can be achieved depending on the object to be processed. Suppressed sieving is possible.

  On the other hand, the sieving apparatus of the present invention is a sieving apparatus including any one of the above-described vibration decks, and a plurality of the vibration decks are arranged in the flow direction of the object to be processed in the apparatus main body, The upstream end of the vibration deck located downstream in the direction is disposed below the downstream end of the vibration deck located upstream. Thereby, a to-be-processed object can be efficiently screened with the sieve net | network provided in the some vibration deck arrange | positioned at step shape.

  Further, the vibration deck may be arranged in a plurality of stages at the upper and lower positions of the apparatus main body. As a result, it is possible to resonate a plurality of stages of vibration decks at the upper and lower positions of the apparatus main body, and to stably screen to a plurality of particle sizes while suppressing clogging of the object to be processed.

  Furthermore, the amplitude of the vibration deck positioned upstream in the flow direction of the workpiece may be set larger than the amplitude of the vibration deck positioned downstream. Thereby, a large to-be-processed object can be screened with a large amplitude on the upstream side of the apparatus main body, and the number of times of contact between the to-be-processed object to be screened and the sieve mesh can be increased on the downstream side, thereby enabling more reliable screening.

  Further, the amplitude of the vibration deck positioned on the upper stage of the vibration deck arranged in the plurality of stages may be set larger than the amplitude of the vibration deck positioned on the lower stage. As a result, it is more stable to screen large objects with large amplitude in the upper part of the main body of the apparatus, and increase the number of contact between the object to be processed and the sieve mesh with small amplitude in the lower part. You can.

  In the present invention, the sieve screen can be vibrated greatly by the resonance of the resonating part by means as described above, so that the object to be processed with a large specific gravity difference or the object to be easily clogged can be efficiently obtained. Sieving can be performed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a plan view of the vibration deck according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line II-II of the vibration deck shown in FIG. 1, and FIG. 3 is a diagram of the vibration deck shown in FIG. FIG. 4A is a sectional view taken along the line IV-IV of the vibration deck shown in FIG. 1, and FIG. 4B is a sectional view showing another example of the sectional view taken along the line IV-IV shown in FIG. 4A. An arrow F directed from left to right in FIGS. 1 and 2 indicates the flow direction of the workpiece, and in this specification and in the claims, the upstream side of the flow direction F of the workpiece. The (left side) is simply referred to as “upstream side”, and the downstream side (right side) is simply referred to as “downstream side”.

  As shown in FIGS. 1 and 2, the vibration deck 1 of this embodiment includes a fixing portion 2 extending in the width direction to be attached to an apparatus main body 73 (a connecting member 71 is shown in FIG. 2) described later, A resonance spring rod 3 is provided at the upper portion of the fixed portion 2 and is a resonance portion extending in the flow direction of the workpiece, and a resonance weight 4 as a weight portion provided at an end of the resonance spring rod 3.

  The fixing portion 2 is formed in a flat plate shape extending in the width direction of the apparatus main body 73, and a plurality of attachment holes 22 for fixing with the bolts 21 are provided on the apparatus main body 73 side. A mounting base 23 for fixing the tip of the resonance spring rod 3 is fixed to the upper surface of the fixing portion 2. In this example, two mounting bases 23 are provided, and through holes 24 are provided in the mounting base 23 in the flow direction of the object to be processed. The mounting base 23 of this embodiment is for holding the upstream end portion of the resonance spring rod 3, and a step portion 25 is formed in the middle portion of the through hole 24. A step portion 33 is formed at the upstream end of the resonance spring rod 3, and the resonance spring rod 3 is inserted into the through hole 24 from the downstream side of the mounting base 23 to lock the step portion 33 to the step portion 25. The nut 31 is fixed by screwing from the upstream side of the mounting base 23. On the upstream side of the attachment base 23, an upstream side mesh locking member 51 that is one of the mesh attachment portions 5 having substantially the same width as the fixed portion 2 is provided. The upstream mesh locking member 51 is formed with a mesh locking claw 52 bent toward the upstream side. The method for locking the resonant spring rod 3 and the mounting base 23 is not limited to this example.

  The resonance spring rod 3 is formed in a rod shape, and a stepped portion 33 is formed at the downstream end portion of the resonance spring rod 3, and the resonance weight 4 serving as the weight portion is attached to the downstream end portion. ing. The resonance weight 4 is a plate-like member extending in the width direction of the apparatus main body 73, and the resonance weight 4 is provided with a through hole 41 at the position of the resonance spring rod 3. The resonance weight 4 is attached to the resonance spring rod 3 by inserting the through hole 41 into the tip of the resonance spring rod 3 and locking it with the step portion 33 and screwing a nut 32 to the tip of the resonance spring rod 3. It has been. In this example, the resonance weight 4 is composed of a plurality of plate materials having different weights (plate thicknesses). This resonance weight 4 may be one resonance weight 4. In this example, two resonance spring rods 3 are provided, but three or more resonance spring rods 3 may be provided in accordance with the width dimension of the apparatus main body 73, the weight of the resonance weight 4, and the like. The number of resonance spring rods 3 may be set according to the conditions for resonance.

  Further, at a predetermined position at the downstream end of the resonance spring rod 3, a downstream mesh locking member 54 having substantially the same width as the upstream mesh locking member 51, which is the other of the mesh mounting portions, is provided. . The downstream mesh locking member 54 is provided in a state in which a through hole 55 provided at the position of the resonance spring rod 3 is inserted into the resonance spring rod 3. As a result, the downstream mesh locking member 54 is movable in the axial direction of the resonance spring rod 3. As shown in FIG. 3, the downstream mesh locking member 54 is attached to the resonance weight 4 with a tension bolt 56. The tension bolt 56 is inserted in a state in which the base portion is locked in a square hole 58 provided in the downstream mesh locking member 54, and the downstream mesh locking member 54 is moved toward the downstream side by the tension bolt 56. I try to let them. The downstream mesh locking member 54 is formed with a mesh locking claw 57 bent toward the downstream side.

  As shown in FIG. 2, the sieve mesh 6 is attached between the downstream mesh locking member 54 and the upstream mesh locking member 51. The sieve mesh 6 is provided with attachment hooks 61 at the upstream end and the downstream end, and is attached by engaging these attachment hooks 61 with the mesh engagement claws 52 and 57. . As the sieve net 6, a metal woven net, punched net, urethane net or the like can be used. In particular, a urethane mesh is preferable because secondary vibrations are likely to occur when the resonant spring rod 3 is resonated. As shown in FIG. 3, the sieve mesh 6 is attached with a predetermined tension by tightening the tension bolt 56 and pulling the downstream mesh locking member 54 toward the resonance weight 4 (downstream).

  As shown in FIG. 4A, the cross-sectional shape of the resonance spring rod 3 may be, for example, a round bar shape, but the vertical dimension is smaller than the width dimension by cutting the top and bottom of the round bar. You may do it. As a result, the lateral stiffness of the resonant spring rod 3 can be made larger than the vertical stiffness, and the lateral vibration of the resonant spring rod 3 can be suppressed to vibrate stably in the vertical direction. As a cross-sectional shape of the resonance spring rod 3, a plate shape wide in the width direction as shown in FIG. 4B may be used. By adopting such a shape, even if it is employed in a sieving device for an excitation source whose vibration direction is not fixed, it can be vibrated stably. As long as the sieving apparatus has a fixed vibration direction, it may be a round bar, and the cross-sectional shape of the resonance spring rod 3 is not limited to these examples.

  FIG. 5 is a side view schematically showing a resonance state of the vibration deck shown in FIG. As shown in FIG. 2, when the apparatus main body 73 is vibrated with the mounting base 23 being fixed, the resonance spring rod 3 resonates, and the resonance weight 4 at the tip greatly vibrates in the vertical direction. When the resonance weight 4 is vibrated greatly, the sieve mesh 6 locked on the upstream side and the downstream side of the resonance spring rod 3 also vibrates greatly. Due to this vibration, secondary vibration also occurs in the middle part of the sieve screen 6.

  In addition, since the resonance is caused by an external excitation force to vibrate with a predetermined amplitude, the amplitude can be arbitrarily adjusted by adjusting the excitation force. At this time, when a urethane mesh is used for the sieve mesh 6, the urethane mesh also vibrates in a secondary fashion following the large vertical vibration caused by the resonance of the resonance spring rod 3, so that the object to be processed is effectively blocked in the opening. Can be deterred.

  FIG. 6 is a cross-sectional view of a vibrating deck according to a second embodiment of the present invention, and FIG. 7 is a side view schematically showing a resonance state of the vibrating deck shown in FIG. The vibration deck 101 according to the second embodiment is applied when the resonance spring rod 3 is provided in at least two stages. In addition, the same code | symbol is attached | subjected to the structure same as the said 1st Embodiment, and the detailed description is abbreviate | omitted.

  As shown in FIG. 6, in this example, an oscillation deck 101 having two upstream and downstream sides is shown, and a downstream sieve is provided at the downstream end of the resonance spring rod 3 located on the upstream side. An upstream mesh locking member 51 for attaching the upstream end of the mesh 6 is provided. The upstream mesh locking member 51 is provided on the downstream side of the upstream resonance weight 4. A downstream mesh locking member 54 for attaching the upstream sieve mesh 6 is provided on the upstream side of the resonance weight 4. Is provided. That is, the upstream mesh locking member 51 for attaching the downstream sieve 6 is fixed to the upstream resonance spring rod 3 with the nut 32 downstream of the upstream resonance weight 4.

  On the other hand, the upstream end of the resonance spring rod 3 located on the downstream side is inserted into a through hole 24 provided in the mounting base 23 and fixed with a nut 31. The resonance weight 4 is fixed to the downstream end of the resonance spring rod 3 with a nut 31, and a downstream mesh locking member 54 is provided on the upstream side of the resonance weight 4. The upstream end of the lower sieve mesh 6 is attached to an upstream mesh locking member 51 provided on the downstream side of the upper resonance spring rod 3, and the downstream end is connected to the downstream mesh locking member 54. Installed on. As a result, the downstream screen 6 is supported by the upstream resonance spring rod 3 at the upstream end, and is supported by the resonance spring rod 3 at the downstream side.

  As shown in FIG. 7, according to the vibration deck 101 of this embodiment, the resonance spring rod 3 on the upstream side and the resonance spring rod 3 on the downstream side resonate and vibrate with the mounting base 23 fixed. Then, the downstream screen 6 greatly moves up and down due to the resonance of the downstream end of the upstream resonance spring rod 3 at the upstream end, so that the downstream screen 6 can be vibrated with a larger amplitude. it can. Therefore, it is suitable for sieving of objects to be processed that are easily clogged.

  FIG. 8 is a cross-sectional view of the vibration deck according to the third embodiment of the present invention, and FIG. 9 is a side view schematically showing the resonance state of the vibration deck shown in FIG. In addition, the same code | symbol is attached | subjected to the structure same as the said 1st Embodiment, and the detailed description is abbreviate | omitted.

  As shown in FIG. 8, the vibration deck 102 according to the third embodiment is provided with resonance spring rods 35 and 36 on the upstream side and the downstream side from the mounting base 23 provided on the fixed portion 2. In this embodiment, an upstream resonance spring rod 35 and a downstream resonance spring rod 36 having substantially the same length are provided on the upstream side and the downstream side from the mounting base 23. The downstream side resonance spring rod 36 has an upstream end inserted into the through hole 24 from the downstream side of the mounting base 23, and is fixed with a nut 31 together with the downstream side end of the upstream resonance spring rod 35 on the upstream side of the mounting base 23. Has been.

  Further, step portions 33 are formed at the upstream end portion of the upstream resonance spring rod 35 and the downstream end portion of the downstream resonance spring rod 36, respectively, and the resonance weight 4 as a weight portion is formed at these end portions. Each is installed. These resonance weights 4 are fixed to the resonance spring rods 35 and 36 by the nut 32 as described above. The upstream resonance spring rod 35 is provided with an upstream mesh locking member 51 on the downstream side of the resonance weight 4 (the upstream mesh locking member 51 shown in the figure employs the same member as the downstream mesh locking member 54). The downstream resonance spring rod 36 is provided with a downstream mesh locking member 54 on the upstream side of the resonance weight 4. These mesh locking members 51, 54 are provided in a state in which through holes 55 provided at the positions of the resonance spring rods 35, 36 are inserted into the resonance spring rods 35, 36. It can move in the axial direction. As shown in FIG. 3, the mesh locking members 51 and 54 are attached to the resonance weight 4 with tension bolts 56.

  A screen mesh 6 is attached to a mesh locking claw 52 formed on the upstream mesh locking member 51 and a mesh locking claw 57 formed on the downstream mesh locking member 54, and the tension bolt 56 Is attached with a predetermined tension.

  As shown in FIG. 9, according to the vibration deck 102 of this embodiment, when the apparatus main body 73 is vibrated with the mounting base 23 being fixed, the ends of the resonance spring rods 35 and 36 on the upstream side and the downstream side. Both parts resonate and the resonance weight 4 greatly vibrates in the vertical direction. When the resonance weight 4 vibrates greatly, the sieve mesh 6 attached to the upstream side of the upstream resonance spring rod 35 and the downstream side of the downstream resonance spring rod 36 also vibrates greatly. According to this embodiment, since the upstream side and the downstream side of the sieve mesh 6 are vibrated greatly in this way, the entire sieve mesh 6 can be vibrated greatly. In addition, since both ends vibrate greatly, the secondary vibration (indicated by a dotted line) occurring in the intermediate portion also increases. In particular, when a urethane mesh is used, the urethane mesh also undergoes secondary vibration following the large vertical vibration caused by the resonance of the resonance spring rods 35 and 36, so that the acceleration increases and the object to be processed is clogged in the opening. Can be suppressed and a large sieving effect can be obtained.

  10 is a side view showing a sieving apparatus provided with the vibration deck shown in FIG. 1, and FIG. 11 is a front view of the sieving apparatus shown in FIG. In the following sieving device 7, the vibration deck 1 of the first embodiment is provided. In FIG. 10, the vibration deck 1 is shown in a transparent state (solid line).

  The sieving device 7 shown in the figure is an inclined type, and a device body 73 is formed by fixing frame members 72 to both side surfaces of a plurality of columnar connecting members 71 formed with a predetermined width. A vibrator 74 serving as a vibration source is provided on the upper portion of the apparatus main body 73. The vibrator 74 includes an attachment plate 75 attached to the frame member 72, a vibration body 76 provided on the attachment plate 75, and a drive motor 77 that rotationally drives the vibration body 76. The vibration generator 76 has a single-shaft configuration, and eccentric weights (not shown) are provided at both ends.

  A support spring 78 that supports the apparatus main body 73 is provided outside the frame member 72. The sieving device 7 is supported on the frame 79 by the support spring 78. According to the sieving device 7, the eccentric weight causes the device body 73 to elliptically vibrate as indicated by the arrow V by driving the vibrator 74.

  Further, a workpiece hopper 80 is provided at the upper upstream side of the apparatus main body 73, and a lower mesh lower discharge chute 81 and a lower mesh upper discharge chute 82 are provided at the lower portion of the apparatus main body 73. .

  The vibration deck 1 is provided on top of a plurality of connecting members 71 provided in the apparatus main body 73. The plurality of connecting members 71 are provided in a stepped shape descending from the upstream side toward the downstream side, and each vibration deck 1 in which the fixing portion 2 is fixed to the upper portion of these connecting members 71 with bolts (not shown). Also, they are arranged in a staircase shape that descends by a predetermined step from the upstream side toward the downstream side. Further, each vibration deck 1 is provided such that the downstream end portion slightly overlaps the upper portion of the vibration deck 1 provided on the downstream side. As a result, the object to be processed that has flowed on the upstream vibration deck 1 falls on the upper part of the downstream vibration deck 1. As described above, by arranging the plurality of stages of the vibration decks 1 in the flow direction F of the object to be processed, the posture of the object to be processed can be changed and the number of times of contact with the sieve mesh 6 can be increased.

  Furthermore, the sieving device 7 shown in the figure has the vibration deck 1 arranged in two stages on the top and bottom. In this case, it is possible to screen a relatively large object to be processed in the upper stage, and further finely screen the object to be processed in the upper part. In the case of this example, the objects to be processed can be screened into three sizes: on the mesh of the upper vibration deck 1, on the mesh of the lower vibration deck 1, and below the mesh.

  As described above, in the sieving device 7 according to this embodiment, the four vibration decks 1 are arranged in the upper stage and the three vibration decks 1 are arranged in the lower stage in the processing object flow direction F of the apparatus main body 73. These vibrating decks 1 form a plurality of screen decks. In addition, on the upstream side of the vibration deck 1 on the most input side, an input side chute 83 for preventing the object to be processed from dropping is provided.

  Moreover, since these vibration decks 1 are configured to provide the sieve mesh 6 on the vibration deck 1 that is resonated by the resonance spring rod 3 and the resonance weight 4, the weight of the vibration body can be suppressed, and a small excitation force, That is, a large amplitude can be generated with a small power. The principle of resonating the resonance spring rod 3 in the sieving device 7 can be considered as a vibration model of a so-called “undamped two-degree-of-freedom system”. The spring constant of the support spring 78 that supports the sieving device 7 and the sieve By setting the overall weight of the distribution device 7, the spring constant of the resonance spring rod 3 of the vibration deck 1, and the weight of the resonance weight 4, the amplitude of the sieve screen 6 with respect to the vibration of the device body 73 can be adjusted.

  Moreover, when a plurality of vibration decks 1 are provided in this way, the amplitude of each sieve mesh 6 can be adjusted by the spring constant of the resonance spring rod 3 and the weight of the resonance weight 4 as described above. It is optional to increase the amplitude on the side to decrease the amplitude on the discharge side, increase the amplitude on the upper stage to decrease the amplitude on the lower stage, or gradually decrease the amplitude from the upstream side toward the downstream side Is possible. That is, in the past, the entire apparatus was vibrated with the same amplitude, and all the sieve meshes 6 were vibrated with the same amplitude. However, according to the sieving apparatus 7, the amplitude is suitable for the mesh openings of the sieve meshes 6. Furthermore, since the amplitude can be arbitrarily adjusted by changing the weight of the resonance weight 4 or adjusting the spring constant of the resonance spring rod 3, the mesh of the sieve mesh 6 can be adjusted according to the object to be processed. The vibration amplitude can be changed by changing.

  Therefore, even for objects to be treated such as shredder dust of building waste with a large difference in bulk specific gravity, such as plastic, wood, earth and sand, concrete, etc., large objects can be sifted down with large amplitude. A small object can be efficiently screened with a small amplitude by increasing the contact time with the screen 6. In addition, in this embodiment, the conditions of the spring constant of the support spring 78 that supports the apparatus main body 73, the weight of the apparatus main body 73, the spring constant of the resonance spring rod 3, and the weight of the resonance weight 4 are set. As a result, the apparatus main body 73 can be brought into a substantially stopped state even in a state where the resonance spring rod 3 of the vibration deck 1 is resonated by the vibration force of the vibrator 74 to vibrate the sieve screen 6. Under such conditions, the strength of the apparatus main body 73 can be reduced and the weight can be reduced, and vibrations transmitted to the gantry 79 can be suppressed to reduce the equipment cost.

  According to the sieving device 7 configured as described above, the workpiece 74 is fed from the feeding hopper 80 in a state where the resonance spring rod 3 of the vibrating deck 1 is resonated by the vibrator 74 and the sieve mesh 6 is vibrated greatly. As a result, the object to be processed is divided into the upper side and the lower side by the sieve screen 6 of the upper vibration deck 1. At this time, since the sieve mesh 6 is vibrated greatly, it is possible to prevent the object to be processed from being clogged or fixed to the sieve mesh 6 and stably screened. Moreover, since the amplitude of the sieve screen 6 can be adjusted by the spring constant of the resonant spring rod 3 and the weight of the resonant weight 4 as described above, the amplitude of the sieve screen 6 can be easily adjusted according to the object to be processed. .

  Therefore, for example, even for a workpiece having a large difference in specific gravity, it is possible to reliably perform screening of a light workpiece with a large amplitude at the input portion, and to perform screening suitable for the workpiece. The sieving efficiency can be greatly improved by adjusting the amplitude of each vibration deck 1. Moreover, since secondary vibration can be generated on the surface of the sieve screen 6, adhesion and adhesion of the object to be processed can be suppressed. This point is more effective in the case of a urethane net.

  FIG. 12 is a side view showing a sieving apparatus including the vibration deck 102 shown in FIG. Also in this figure, the vibration deck 102 is shown in a transparent state (solid line).

  The sieving apparatus 9 shown in the figure is a horizontal type slightly inclined, and an apparatus main body 93 is formed by fixing frame members 92 to both sides of the connecting member 91. A vibrator 94 is provided on the upper part of the apparatus main body 93. The vibrator 94 includes a mounting plate 95 to which the frame member 92 is attached, and a vibration body 96 provided on the mounting plate 95. The vibrating body 96 has a biaxial configuration, and eccentric weights (not shown) are provided at opposite ends in opposite directions. The vibrator 96 reversely rotates the two axes to cancel the excitation forces in the opposite directions of the eccentric weight, and causes the apparatus main body 93 to linearly vibrate as indicated by the arrow V when facing the same direction. . The apparatus main body 93 is also supported by a support spring 98.

  In this embodiment, the vibration deck 102 is provided stepwise from the upstream side of the apparatus main body 93. In this example, a four-stage vibration deck 102 is provided on the downstream side of the input deck 97 provided on the upstream side of the apparatus main body 93. These vibration decks 102 also have the fixing portion 2 fixed to the connecting member 91 with bolts 22 (FIG. 8).

  According to the sieving device 9 of this embodiment, since the device main body 93 is linearly vibrated, the resonance spring rods 35 and 36 vibrate on the upstream side and the downstream side of the connecting member 91 by providing the vibration deck 102. Thus, the sieve screen 6 can be vibrated greatly to prevent clogging and the like, and the entire surface of the sieve mesh 6 can be vibrated greatly to screen the workpieces efficiently.

  In this embodiment, the case where the vibration deck 102 is provided has been described. However, other vibration decks 1, 101, etc. may be provided, which are preferable according to the properties of the object to be processed and the mesh openings of the sieve screen 6. Should be adopted.

  As described above, according to the sieving devices 7 and 9, the excitation force and the resonance amplitude for resonating the resonance spring rod 3 that supports the sieve mesh 6 and the resonance weight 4 are obtained from the resonance spring rod 3. Since it can be easily adjusted by the spring constant and the weight of the resonance weight 4, it is possible to easily adjust each sieve mesh 6 to the optimum amplitude and frequency for the sieving conditions. Moreover, since the sieve screen 6 is vibrated greatly using the resonance of the resonant spring rod 3, a large amplitude can be obtained with a small power. Furthermore, since the screen surface of the sieve screen 6 can be subjected to the secondary vibration by itself while the sieve screen 6 is primarily vibrated at the optimum vibration frequency / amplitude, the object to be treated adheres to the sieve mesh 6. Fixing and sticking can be stably suppressed.

  Further, since the structure of supporting the sieve screen 6 with the resonance spring rod 3 and the resonance weight 4 is vibrated by the resonance of the light vibration deck, the spring constants of the support springs 78 and 98 for supporting the apparatus main bodies 73 and 93 are obtained. By setting the conditions of the weights of the apparatus main bodies 73 and 93, the spring constant of the resonance spring rod 3, and the weight of the resonance weight 4, it is possible to prevent a large driving force from being required during operation and to provide the necessary power at the time of startup. If it is a sieving device, the strength of the device main bodies 73 and 93 can be suppressed and the power can be reduced.

  As described above, one or a plurality of vibration decks 1, 101, 102 are provided in the apparatus main body serving as one excitation source, and the amplitude is suitable for the opening of the sieve mesh 6 of each vibration deck 1, 101, 102. Since each can be adjusted arbitrarily, the sieving efficiency of the sieving device can be greatly improved. Further, by providing one or a plurality of vibration decks 1, 101, 102 in the apparatus main body serving as one excitation source, and selecting a condition for reducing the amplitude of the apparatus main body while maintaining the amplitude of the screen mesh 6, Vibration transmission from the minute device to the foundation can be reduced.

  In the above-described embodiment, the example in which the vibration deck 1 of the first embodiment is provided in the sieving device 7 and the vibration deck 102 of the third embodiment is provided in the sieving device 9 has been described. The decks 1, 101, 102 may have other configurations. Further, the sieving devices 7 and 9 are not limited to the uniaxial type and the biaxial type as long as the sieving device can vibrate the sieving mesh 6 with a desired amplitude by the resonance of the vibration deck. The format is not limited to the above embodiment, and may be other formats.

  Furthermore, the above-described embodiment shows an example, and various modifications can be made without departing from the gist of the present invention, and the present invention is not limited to the above-described embodiment.

  The vibration deck according to the present invention can be used for stably sieving an object to be processed mixed with an object having a large specific gravity difference or an object to be processed that is difficult to be screened.

It is a top view of the vibration deck which concerns on 1st Embodiment of this invention. It is II-II sectional drawing of the vibration deck shown in FIG. FIG. 3 is a sectional view of the vibration deck shown in FIG. 1 taken along the line III-III. It is IV-IV sectional drawing of the vibration deck shown in FIG. It is sectional drawing which shows the other example of IV-IV sectional drawing shown to FIG. 4A. It is a side view which shows typically the resonance state of the vibration deck shown in FIG. It is sectional drawing of the vibration deck which concerns on 2nd Embodiment of this invention. It is a side view which shows typically the resonance state of the vibration deck shown in FIG. It is sectional drawing of the vibration deck which concerns on 3rd Embodiment of this invention. It is a side view which shows typically the resonance state of the vibration deck shown in FIG. FIG. 2 is a side view showing a sieving apparatus including the vibration deck shown in FIG. It is a front view of the sieving apparatus shown in FIG. It is a side view which shows the sieving apparatus provided with the vibration deck shown in FIG.

Explanation of symbols

1 ... Vibration deck
2 ... fixed part
3 ... Resonant spring rod 35 ... Resonant spring rod 36 ... Resonant spring rod
4 ... Resonance weight
DESCRIPTION OF SYMBOLS 5 ... Net attachment part 51 ... Upstream side net | network locking member 52 ... Net | network locking claw 54 ... Downstream side net | network locking member 56 ... Tension bolt 57 ... Net | hook claw
6 ... Sieve 61 ... Mounting hook
DESCRIPTION OF SYMBOLS 7 ... Sieving apparatus 71 ... Connecting member 72 ... Frame member 73 ... Apparatus main body 74 ... Vibrator 78 ... Support spring
DESCRIPTION OF SYMBOLS 9 ... Sieving apparatus 91 ... Connecting member 92 ... Frame member 93 ... Apparatus main body 94 ... Vibrator 98 ... Support spring 101 ... Vibrating deck 102 ... Vibrating deck

Claims (10)

A vibration deck for sieving a workpiece to be processed with a predetermined size,
A fixing part for fixing to the apparatus body;
A resonance part extending from the fixed part in the flow direction of the workpiece;
A weight part for adjusting the amplitude of the resonance part at the end of the resonance part;
A vibration deck comprising a mesh attachment portion for attaching a sieve mesh to an end of the resonance portion.   The vibration deck according to claim 1, wherein the weight portion is configured to be adjustable in weight.   The vibration deck according to claim 1 or 2, wherein the resonating part is formed of a rod-shaped member, and the spring constant of the resonating part is adjustable.   The vibration deck according to claim 3, wherein the resonance unit is configured such that rigidity in the vertical direction is smaller than rigidity in the horizontal direction.   The vibration deck according to any one of claims 1 to 4, wherein the resonance part extends from the fixed part toward an upstream side and a downstream side in the flow direction of the workpiece. At least two resonance parts according to any one of claims 1 to 5 are arranged in parallel in the flow direction of the workpiece,
A vibration deck in which an upstream side net attachment portion of a downstream sieve screen is attached to a downstream end portion of a resonance portion of an upstream side vibration deck. A sieving device including the vibration deck according to any one of claims 1 to 6,
A plurality of the vibration decks are arranged in the flow direction of the workpiece of the apparatus main body, and the upstream end of the vibration deck located downstream in the flow direction of the workpiece is more downstream than the downstream end of the vibration deck located upstream. A sieving device, which is arranged on the lower side.   The sieving apparatus according to claim 7, wherein the vibration deck is arranged in a plurality of stages at the upper and lower positions of the apparatus main body.   The sieving device according to claim 7 or 8, wherein an amplitude of the vibration deck positioned upstream in the flow direction of the workpiece is set larger than an amplitude of the vibration deck positioned downstream.   The sieving device according to any one of claims 7 to 9, wherein an amplitude of a vibration deck positioned on an upper stage of the vibration deck arranged in a plurality of stages is set larger than an amplitude of a vibration deck positioned on a lower stage.

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