JP2019076901A - Vibrating screening machine - Google Patents

Abstract

To provide a vibrating screening machine capable of reliably preventing a net tool frame from being deformed when the net tool is fixed to a screen frame body, and capable of preventing the tension of a screen-through net tightly bound and fixed to the net tool frame from loosening due to deformation of the net tool frame.SOLUTION: A vibrating screening machine is configured to fix a net tool 40 to a screen frame body 7 by pinching a net tool frame 42 with upper and lower divided screen frames 7a and 7b, and to screen powder as classification target by applying vibration to the powder dropped on the net tool 40 via the screen frame body 7. The net tool frame 42 comprises an annular ring plate part 42a having a plate surface facing the divided screen frames 7a and 7b, and an outer cylindrical part 42b projecting downward from the outer peripheral edge of the annular ring plate part 42a. The net tool 40 is fixed to the screen frame body 7 by the pinching of the annular ring plate part 42a in a plate thickness direction with the divided screen frames 7a and 7b, and a screen-through net 44 is tightly bound and fixed to the net tool frame 42 by a fastening band 45 attached on the outer peripheral surface side of the outer cylindrical part 42b.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vibrating sieve that classifies various powders such as pharmaceuticals, foodstuffs, mineral products, metals, resin raw materials and the like by vibration, and in particular, a direct-type vibrating sieve capable of suppressing the height of the machine. About.

  Conventionally, a direct-type vibration sieve machine is provided with a vibrating plate which is supported by a plurality of compression coil springs on a table so as to be able to vibrate, and a sieve frame in which a mesh is incorporated is fixed to the vibrating plate. A vibration motor is disposed on both the left and right sides of the sieve frame, and the action of this vibration motor causes the powder to be classified which has been dropped onto the mesh to vibrate through the sieve frame to separate the particles. It is comprised (refer patent document 1).

Utility model registration 3188460 gazette

  As shown in FIG. 7, in the vibrating sieve 100 according to Patent Document 1, the sieve frame body 101 is composed of a cylindrical upper divided sieve frame 101a and a lower divided sieve frame 101b which can be separated vertically. An outwardly and downwardly inclined tapered flange portion 102 is formed in the lower portion of the upper divided sieve frame 101a, while an outwardly and upwardly inclined tapered flange portion 103 is formed in the upper portion of the lower divided sieve frame 101b. It is formed to correspond to the tapered flange portion 102 in the upper divided sieve frame 101a.

  A mesh support member 104 is disposed inside the sieve frame 101 at the boundary position between the upper divided sieve frame 101a and the lower divided sieve frame 101b, and the ring packing 105 is disposed on the mesh support member 104. The netting 106 is placed. In order to stabilize the netting 106, a pressing plate 108 for pressing the netting frame 106 via the wire mesh packing 107 is disposed at an upper portion of the netting 106 inside the upper divided sieve frame 101a.

  Here, the mesh support member 104 is a ring plate 109 having an L-shaped cross section and an annular plate in plan view, and a sieve that is attached to the outer peripheral portion of the ring plate 109 and seals the gap between the upper and lower divided sieve frames 101a and 101b. It is comprised by the frame packing 110. Further, the netting 106 covers the reinforcing net 113 on the netting main body 111 formed by stretching the reinforcing net 113 on the ring-shaped netting frame 112 and sieves so as to hang on the outer peripheral surface of the netting frame 112 The screen 114 is attached to the mesh main body 111 by a tightening band 115 attached to the outer peripheral surface side of the netting frame 112 so as to cover the netting 114 and sandwich the screening net 114 with the outer peripheral surface of the netting frame 112. It is what is tied up and fixed.

  On the outer peripheral surface of the upper divided sieve frame 101a, a required hooking bracket 120 is protruded at a predetermined pitch in the circumferential direction, and is rocked so as to be bridged between the hooking bracket 120 and a vibrating plate not shown. A required movable swing bolt 121 is installed on the vibrating plate. Then, the upper split screen frame 101a and the lower split screen frame 101b are fastened by tightening the nuts 122 screwed to the respective swing bolts 121 and seated on the retaining bracket 120. At this time, a part of the axial force from the swing bolt 121 accompanying the tightening of the nut 122 acts on the mesh frame 112 through the hooking bracket 120, the upper divided sieve frame 101a, the pressing plate 108 and the wire mesh packing 107 The mesh frame 112 is clamped by the plate 108 and the ring packing 105 with a clamping force corresponding to the axial force, and the mesh 106 is fixed to the sieve frame 101.

  By the way, in the conventional vibrating sieving machine 100, the netting frame 112 is a hollow structure formed by bending a pipe member having a rectangular cross section into a circular ring shape and welding its both ends. For this reason, when fixing the mesh 106 to the sieve frame 101, for example, when the nut 122 is excessively tightened by exceeding the specified tightening torque, the mesh frame 112 is held by the pressing plate 108 and the ring packing 105. May be pinched with an excessive pinching force, and the mesh frame 112 may be deformed to loosen the tension of the sieve mesh 114 tied and fixed to the mesh frame 112, resulting in deterioration of classification performance. There is a problem that there is.

  The present invention has been made in view of the above problems, and can securely prevent the netting frame from being deformed when the netting is fixed to the sieve frame, and the netting frame is bound and fixed to the netting frame. It is an object of the present invention to provide a vibrating sieving machine capable of preventing the tension of the sieve screen from loosening due to the deformation of the mesh frame.

The characteristic configuration of the vibrating screen according to the present invention for solving the above problems is as follows:
A sieve frame consisting of a plurality of cylindrical divided sieve frames which can be separated up and down; and a netting formed by stretching a reinforcing net on a ring-shaped netting frame and covering the reinforcing net. The mesh frame is fixed by the mesh frame by holding the mesh frame by upper and lower divided mesh frames adjacent to each other in the upper and lower sides of the divided mesh frame, and the mesh frame is fixed on the mesh It is a vibration sieving machine in which the particles to be classified which have been dropped are subjected to vibrations through the sieve frame so as to be sieved,
The mesh frame has an annular plate portion having plate surfaces respectively facing the upper and lower divided sieve frames and an outer cylindrical portion protruding downward from the outer peripheral edge of the annular plate portion. Have and
By holding the annular plate portion in the thickness direction by the upper divided sieve frame and the lower divided sieve frame, the mesh is fixed to the sieve frame.
The screen is fastened and fixed to the mesh frame by a tightening band attached to the outer peripheral surface side of the outer cylindrical portion so as to sandwich the sieve net with the outer peripheral surface of the outer cylindrical portion. It is to have done.

  According to the vibrating sieve of this configuration, the mesh plate in the mesh frame is held in the thickness direction by the annular plate portion having no hollow portion by the upper divided sieve frame and the lower divided sieve frame. Since the mesh frame is fixed to the sieve frame, it is possible to reliably prevent the mesh frame from being deformed when fixing the mesh to the sieve frame, and it is possible to secure the mesh frame by binding and fixed to the mesh frame. It is possible to prevent the tension from loosening due to the deformation of the mesh frame.

In the vibrating screen according to the present invention,
The tightening band is a band member which is wound annularly on the outer peripheral surface side of the outer cylindrical portion so as to sandwich the screening mesh with the outer peripheral surface of the outer cylindrical portion, and the outer peripheral surface side of the band member And a band diameter adjusting mechanism for adjusting the size of the band diameter of the band member, wherein the outer cylindrical portion of the mesh frame is the outer side of the upper divided sieve frame and the lower divided sieve frame Preferably, the annular plate portion is sandwiched in the thickness direction by the divided sieve frames so as to be exposed to the

  According to the vibrating sieve machine of this configuration, the band diameter of the band member annularly wound on the outer peripheral surface side of the outer cylindrical portion so as to sandwich the sieve mesh with the outer peripheral surface of the outer cylindrical portion in the mesh frame Since the size of the screen is adjusted by the band diameter adjusting mechanism, the screen can be easily tied and fixed to the mesh frame by the tightening band even if there is a change in the mesh or wire diameter of the screen to be used. Also, by adopting a configuration in which the annular plate portion is held in the thickness direction by the divided sieve frames such that the outer cylindrical portion in the mesh frame is exposed to the outside of the upper divided sieve frame and the lower divided sieve frame Since the band diameter adjusting mechanism of the tightening band mounted on the outer peripheral surface side of the outer cylindrical portion in the frame is exposed to the outside of the upper divided sieve frame and the lower divided sieve frame, the tightening band interferes with the sieve frame The netting can be incorporated into the sieve frame without.

FIG. 1 shows a vibrating screen according to an embodiment of the present invention, wherein (a) is a plan view and (b) is a front view. FIG. 2 shows the vibrating sieve, wherein (a) is a view taken in the direction of arrow A in FIG. 1 (b) and (b) is a cross-sectional view taken along the line B-B in FIG. 1 (b). Fig. 3 shows the netting used in the vibration sieving machine, (a) is a plan view, (b) is a cross-sectional view taken along the line C-C of (a), (c) is an enlarged view of D part of (a) A figure (d) is an E arrow line view of (c). FIG. 4 is an explanatory view (1) of the net change work procedure. FIG. 5 is an explanatory view (2) of the net change work procedure. FIG. 6 is an explanatory view (3) of the net change work procedure. FIG. 7 is an explanatory view of the prior art.

  Hereinafter, the present invention will be described with reference to the drawings. However, the present invention is not intended to be limited to the configurations described in the embodiments and drawings described below.

<Schematic Description of Vibratory Sieve Machine>
As shown in FIGS. 1 (a) and 1 (b), the vibrating screen 1 of the present embodiment is of the direct type capable of suppressing the height of the airframe, and is a medicine, food, mineral product, metal. It has the function of classifying various powders such as resin raw materials by vibration. The vibrating sieve 1 includes a vibrating plate 3 disposed above the gantry 2.

<Vibration plate>
The vibrating plate 3 is formed of a plate-like member having a predetermined thickness in a plan view octagonal ring shape having a mounting hole at the center and having a predetermined thickness, and a plurality of vibrating plates 3 provided in a predetermined arrangement along the circumferential direction of the vibrating plate 3 It is vibratably supported by (12, in this example) compression coil springs (elastic supports) 4.

  The vibrating plate 3 is provided with a reinforcing plate 5 along the outer peripheral edge thereof. The reinforcing plate 5 is formed by bending a strip-shaped plate material in accordance with the outer peripheral shape of the vibrating plate 3 so as to project vertically downward from the lower plate surface of the vibrating plate 3 over substantially the entire circumference of the vibrating plate 3 It is fixed. Thereby, the rigidity of the vibrating plate 3 can be improved while suppressing the weight increase of the vibrating plate 3. Therefore, even if the high output vibration motor 30 is adopted, bending or twisting of the vibration plate 3 can be prevented in advance, whereby the high output vibration motor 30 can be adopted. The classification ability can be improved.

<Sieve container>
The sieve container 6 is attached to the mounting hole of the vibrating plate 3. The sieve container 6 has a sieve frame 7 opened up and down into which powder to be classified is input, and is detachably mounted on the upper opening of the sieve frame 7 and has a powder inlet 8a at the center. The cover 8 is configured.

<Sieve frame>
As shown in FIGS. 2A and 2B, the sieve frame body 7 is configured by combining an upper divided sieve frame 7a and a lower divided sieve frame 7b which can be separated vertically.

  The upper divided sieve frame 7a has a cylindrical upper divided sieve frame main body 10 opened upward and downward, and a flange portion 11 protruding radially outward from the lower end of the upper divided sieve frame main body 10 over the entire circumferential direction. And a tapered flange portion 12 projecting outward and obliquely upward from the upper end portion of the upper divided sieve frame main body 10 over the entire region in the circumferential direction. A ring-shaped packing 13 is attached to the flange portion 11 of the upper divided sieve frame 7a along the entire circumference.

  A discharge duct 14 is attached to one side of the upper divided sieve frame 7a in the front-rear direction so as to protrude from the cylindrical wall surface of the upper divided sieve frame main body 10. The discharge duct 14 serves to lead the residual powder remaining on the netting 40 described later during classification processing to the outside.

  The lower divided sieve frame 7b extends in the radial direction from the upper end of the lower divided sieve frame main body 20 so as to correspond to the lower divided sieve frame main body 20 and the flange portion 11 of the upper divided sieve frame 7a. It is comprised by the flange part 21 projected outward. A ring-shaped packing 22 is attached to the flange portion 21 of the lower divided sieve frame 7b along the entire circumference.

  The lower divided sieve frame main body 20 is provided with a cylindrical cylindrical portion 25 opened upward and downward, and a funnel-shaped chute portion 26 tapered downward is continuously provided below the cylindrical portion 25. A discharge port 27 for dropping and discharging the powder in the chute portion 26 downward is continuously provided below the portion 26.

<Vibration motor>
As shown in FIGS. 1 (a) and 1 (b), a beam member 28 is disposed on the lower divided sieve frame 7b so as to penetrate in the left-right direction. 29 are fixed, and the vibration motor 30 is attached to each motor attachment plate 29. Each vibration motor 30 generates a vibration by rotation of an eccentric weight provided at both ends of the rotor shaft, although the detailed description thereof is omitted.

As shown in FIG. 2A, in the vibration motor 30, the angle θ of the axis S _{R of the} rotor shaft with respect to the horizontal axis S _L is set in the range of 55 ° to 65 °. It is disposed at an inclination of θ = 60 °. In each of the left and right vibration motors 30, one vibration motor 30 and the other vibration motor 30 are laterally symmetrical with respect to the horizontal angle as viewed from one side in the horizontal direction so as to be in opposite phase to each other. It is arranged at (the same corner). In this way, it is possible to maximize the vertical vibration component while securing the necessary horizontal vibration component, and the powder on the netting 40 to be described later is vigorously jumped up by the wave motion and the nets 43 and 44 described later By colliding with the particles, the aggregation of the powder particles is broken and dispersed, and the classification ability can be further improved.

<Joining structure of lid and upper divided sieve frame>
As shown in FIG. 2B, a lid packing 31 for sealing the gap between the outer peripheral edge of the lid 8 and the tapered flange portion 12 of the upper divided sieve frame 7a is supported by the ring plate 32. It is inserted in the state. At the butt portion of lid 8 and upper divided sieve frame 7a, a V-shaped fastening band 33 of section V capable of sandwiching the outer peripheral edge of lid 8 and tapered flange portion 12 of upper divided sieve frame 7a is wound. The lid 8 and the upper split screen frame 7a can be fastened by being hooked and fastened by the fastening band 33, while the upper split screen frame 7a is released by releasing the fastening of the fastening band 33. The lid 8 can now be removed.

<Nettings>
A mesh 40 is disposed inside the sieve frame 7 so as to be located at the boundary between the upper divided sieve frame 7a and the lower divided sieve frame 7b. As shown in FIGS. 3A and 3B, the netting 40 includes a netting main body 41 formed by stretching a reinforcing net 43 on a ring-shaped netting frame 42. Here, the mesh frame 42 is formed by bending an equilateral angle steel having a L-shaped cross section, a so-called angle member into an annular shape and welding its both ends, and the upper divided sieve frame 7a and the lower divided sieve It has an annular plate portion 42a having a plate surface opposed to each of the frames 7b, and an outer cylindrical portion 42b protruding downward from the outer peripheral edge of the annular plate portion 42a.

  The reinforcing net 43 in the netting main body 41 is, for example, made of stainless steel and a relatively rough netting is used, and is secured by a fixing means such as seam welding in a state of being stretched over the opening of the netting frame 42. On the reinforcing mesh 43, a sheet-like screen mesh 44 made of, for example, nylon (stainlessly made of course) may be placed which is finer than the reinforcing mesh 43. The screening mesh 44 covers the reinforcing mesh 43 and covers the mesh main body 41 so as to hang from the reinforcing mesh 43 onto the outer peripheral surface of the outer cylindrical portion 42 b of the mesh frame 42. Then, by tightening the tightening band 45 wound around the outer peripheral surface side of the outer cylindrical portion 42b of the netting frame 42 so as to sandwich the netting screen 44, the netting main body 41 of the netting frame 41 (netting frame 42) is separably attached to the net body 41 so that the screen 44 can be removed from the net body 41 by loosening the tightening band 45. It is done. Thus, the reinforcing net 43 stretched on the netting frame 42 functions as a reinforcing material for supporting the screening net 44 from the lower side, and is sieved detachably attached to the netting main body 41 so as to cover the reinforcing net 43. Since the net 44 is made to function as a net that substantially contributes to the classification process of the powder, it is possible to easily change the netting of the netting 40 by merely replacing the screening net 44. it can.

<Tightening band>
As shown in FIGS. 3 (a) to 3 (d), the fastening band 45 is formed of the mesh frame 42 so as to sandwich the screen 44 with the outer peripheral surface of the outer cylindrical portion 42b of the mesh frame 42. A band member 46 made of, for example, a metal such as stainless steel, which is bent in an annular shape so as to be able to be wound around the outer peripheral surface side, is attached to the outer peripheral surface side of the band member 46 to adjust the band diameter of the band member 46 And an adjustable band diameter adjusting mechanism 47.

  In the band diameter adjusting mechanism 47, a housing 48 attached to one end of the band member 46, and worm teeth (not shown) are formed on the outer periphery of the shaft portion, and the worm teeth are disposed inside the housing 48 and the housing 48. And a plurality of worm grooves 50 formed to mesh with the worm teeth of the spindle 49 at the other end of the band member 46, and the other end of the band member 46 is provided. The part is inserted into the housing 48, and both are screwed so that the worm groove 50 and the worm teeth of the spindle 49 may be engaged with each other.

  In the band diameter adjusting mechanism 47, when the spindle 49 is rotated, for example, to tighten a bolt, the band member 46 is reduced in diameter by the screw feeding action by the worm teeth of the spindle 49 and the worm groove 50 engaged therewith. The other end of the member 46 is moved along the one end so that the object to be bound (in this example, the screening mesh 44) disposed inward of the band member 46 is tightened.

<Joining structure of upper divided sieve frame and lower divided sieve frame>
As shown in FIGS. 2A and 2B, on the outer peripheral surface of the upper divided sieve frame 7a, a plurality of retaining brackets 60 are provided in a protruding manner at a predetermined pitch in the circumferential direction. The hooking bracket 60 is formed by providing a pair of hooking portions 60b on both sides of an inlet 60a opened to the outside in the radial direction of the upper divided sieve frame 7a.

  The upper surface of the vibration plate 3 is shaken between a lower position position which is lowered to the vibration plate 3 side and an upright position position which is erected so as to bridge between the vibration plate 3 and the hook bracket 120. A movable swing bolt 61 is installed. Then, the upper split screen frame 7a and the lower split screen frame 7b are fastened by tightening the nuts 62 which are screwed onto the swing bolts 61 in the upright position and seated on the retaining bracket 60. There is.

  Thus, since the upper divided sieve frame 7a and the lower divided sieve frame 7b are securely fastened by tightening the nut 62 to the swing bolt 61, even if the high amplitude vibration motor 30 is used to increase the vertical amplitude. The loosening does not occur in the joint portion between the upper divided sieve frame 7a and the lower divided sieve frame 7b, and it is possible to prevent the loss of the vibrational motion in the vertical direction caused by the loosening. Also, even if the nut 62 is tightened to the swing bolt 61 in a state where the screening mesh 44 protrudes from the butt portion of the upper divided sieve frame 7a and the lower divided sieve frame 7b, the swing bolt 61 is not in direct contact and tightened, but it is tightened by exerting an axial force from the swing bolt 61 indirectly on the butt portion through the upper divided screen frame 7a and the lower divided screen frame 7b. Therefore, it does not bite the sieve mesh 44 and break it.

<Net change work>
Next, in the vibration sieving machine 1 of the present embodiment, the attachment work of the screening mesh 44 accompanied by the net change work for recovering the function of the mesh 40 will be described.

  First, as shown in FIG. 4A, on the packing 22 mounted on the flange portion 21 of the lower divided sieve frame 7b, the mesh frame 42 is the lower divided sieve frame main body 20 (FIG. 2B) Place the netting main body 41 concentrically with the reference).

  Next, as shown in FIGS. 4 (a) and 4 (b), the screen mesh 44 is put on the reinforcing net 43 of the netting main body 41, and the netting frame 42 from above the reinforcing net 43 (see FIG. 4 (a)). The clamp band 45 is wound on the outer peripheral surface side of the netting frame 42 so that the screen mesh 44 in a state of hanging on the outer peripheral surface side of the outer cylindrical portion 42b in FIG. 4 (b) to 5 (a), the spindle 49 of the band diameter adjusting mechanism 47 is rotationally operated using the tightening tool 65 so as to tighten a bolt, for example, and the band member of the tightening band 45 The diameter of 46 is reduced and the screen 44 is tightened to bind and fix the screen 44 to the net body 41 (net frame 42). In the screen mesh 44, the excess portion protruding from the tightening band 45 is appropriately cut or folded, and when the upper divided sieve frame 7a is placed in the operation described later, the inside of the upper divided sieve frame 7a To be housed in

  Next, as shown in FIG. 5 (b), the packing 13 mounted on the flange portion 11 of the upper divided sieve frame 7a abuts on the whole area of the mesh frame 42 through the sieve mesh 44 and the upper divided sieve The upper divided sieve frame 7 a is placed on the netting 40 so that the frame body 10 is concentric with the netting frame 42.

  Next, as shown in FIGS. 6 (a) and 6 (b), the swing bolts 61 are sequentially passed over the retaining bracket 60 as the upright state position, and the nuts 62 screwed to the swing bolts 61 are tightened. The nut 62 seated on the retaining bracket 60 is further tightened so that the axial force from the swing bolt 61 can be divided at the butt portion of the upper dividing screen frame 7a and the lower dividing screen frame 7b. By acting indirectly through the screen frame members 7a and 7b, the upper divided screen frame 7a and the lower divided screen frame 7b are fastened by tightening. Thus, the mesh 40 is fixed to the sieve frame 7 by sandwiching the annular plate portion 42a of the mesh frame 42 from above and below in the plate thickness direction by the upper divided sieve frame 7a and the lower divided sieve frame 7b. When the installation work of the screening mesh 44 accompanying the work is completed, the vibrating screen 1 becomes usable.

<Classification processing operation>
The powder to be classified is introduced into the upper divided sieve frame 7a in the vibrating sieve 1 which is made usable by the above-mentioned mounting operation of the sieve mesh 44.
Next, the lid 8 is attached to the upper divided sieve frame 7 a, and both are fastened by the fastening band 33.
Then, by operating the left and right vibration motors 30 in synchronization, the powders to be classified that are dropped onto the netting 40 are vibrated and sieved.
The vibration component in the longitudinal direction and the vibration component in the lateral direction are transmitted from the vibration motor 30 to the sieve container 6, and the powder on the netting 40 is sharply jumped up by the wave motion by the vertical and horizontal vibration motion of the sieve container 6. By colliding with the nets 43 and 44, the aggregation of the powder particles is broken up and dispersed.
The powder that has passed through the screening mesh 44 in the classification process is discharged to the outside from the discharge port 27 of the lower divided sieve frame 7b. On the other hand, residual powder remaining on the screen 44 is discharged to the outside through the discharge duct 14.

<Function effect>
According to the vibrating screen 1 of the present embodiment, the ring plate portion 42a in the netting frame 42 not having a hollow portion in the structure is vertically moved in the thickness direction by the upper divided sieve frame 7a and the lower divided sieve frame 7b. Since the netting 40 is fixed to the sieve frame 7 by being held from the above, it is possible to reliably prevent the netting frame 42 from being deformed when fixing the netting 40 to the sieve frame 7. It is possible to prevent, in advance, the tension of the screen 44 bound and fixed to the mesh frame 42 from being loosened due to the deformation of the mesh frame 42.

  Further, the band diameter of the band member 46 annularly wound on the outer peripheral surface side of the outer cylindrical portion 42b is the band diameter so as to sandwich the screening network 44 between the mesh frame 42 and the outer peripheral surface of the outer cylindrical portion 42b. Since it is adjusted by the diameter adjusting mechanism 47, the screen 44 can be easily tied and fixed to the net body 41 by the tightening band 45 even if there is a change in the mesh or wire diameter of the screen 44 used. it can. Further, the annular plate portion 42a is vertically moved in the plate thickness direction by the divided sieve frames 7a and 7b so that the outer cylindrical portion 42b in the netting frame 42 is exposed to the outside of the upper divided sieve frame 7a and the lower divided sieve frame 7b. The band diameter adjusting mechanism 47 of the tightening band 45 mounted on the outer peripheral surface side of the outer cylindrical portion 42b of the netting frame 42 by the adoption of the configuration of sandwiching from the outer side of the upper divided sieve frame 7a and the lower divided sieve frame 7b The netting 40 can be incorporated into the screen frame 7 without the clamping band 45 interfering with the screen frame 7.

  Further, the annular plate portion 42a of the mesh frame 42 is sandwiched from above and below via the packings 13 and 22 by the flange portion 11 of the upper divided sieve frame 7a and the flange portion 21 of the lower divided sieve frame 7b. The fixture frame 42 is disposed outside the upper and lower divided sieve frame main bodies 10 and 20, and the reinforcing mesh 43 and the sieve mesh 44 which substantially function to screen the powder to be classified are the upper and lower divided sieve frame main bodies 10, The effective area of the reinforcing mesh 43 and the screen mesh 44 which are to be disposed within the frame of 20 can be maximized, and the particles to be classified can be screened more efficiently. It can be divided.

  As mentioned above, although the vibrating sieve of this invention was demonstrated based on one Embodiment, this invention is not limited to the structure described in the said embodiment, The structure is suitably changed in the range which does not deviate from the meaning. It is something that can be done.

  The vibrating screen according to the present invention can reliably prevent the netting frame from being deformed when fixing the netting on the screen frame body, and the tension of the screen through which the net is bound and fixed. Because it has the property of being able to prevent loosening due to the deformation of the mesh frame, classification of various powders such as pharmaceuticals, foodstuffs, mineral products, metals, resin raw materials etc. It can be used in applications.

DESCRIPTION OF SYMBOLS 1 vibration sieving machine 7 sieve frame 7a upper divided sieve frame 7b lower divided sieve frame 10 upper divided sieve frame main body 11 flange portion 20 lower divided sieve frame main body 21 flange portion 40 netting 41 mesh main body 42 netting frame 42a Annular plate portion 42b Outer cylindrical portion 43 Reinforcement net 44 Sifting net 45 Tightening band 46 Band member 47 Band diameter adjustment mechanism

Claims (2)

A sieve frame consisting of a plurality of cylindrical divided sieve frames which can be separated up and down; and a netting formed by stretching a reinforcing net on a ring-shaped netting frame and covering the reinforcing net. The mesh frame is fixed by the mesh frame by holding the mesh frame by upper and lower divided mesh frames adjacent to each other in the upper and lower sides of the divided mesh frame, and the mesh frame is fixed on the mesh It is a vibration sieving machine in which the particles to be classified which have been dropped are subjected to vibrations through the sieve frame so as to be sieved,
The mesh frame has an annular plate portion having plate surfaces respectively facing the upper and lower divided sieve frames and an outer cylindrical portion protruding downward from the outer peripheral edge of the annular plate portion. Have and
By holding the annular plate portion in the thickness direction by the upper divided sieve frame and the lower divided sieve frame, the mesh is fixed to the sieve frame.
The screen is fastened and fixed to the mesh frame by a tightening band attached to the outer peripheral surface side of the outer cylindrical portion so as to sandwich the sieve net with the outer peripheral surface of the outer cylindrical portion. A vibrating sieve machine characterized by having   The tightening band is a band member which is wound annularly on the outer peripheral surface side of the outer cylindrical portion so as to sandwich the screening mesh with the outer peripheral surface of the outer cylindrical portion, and the outer peripheral surface side of the band member. And a band diameter adjusting mechanism for adjusting the size of the band diameter of the band member, wherein the outer cylindrical portion of the mesh frame is the outer side of the upper divided sieve frame and the lower divided sieve frame The vibrating screen according to claim 1, characterized in that the annular plate portion is sandwiched in the thickness direction by the divided sieve frames so as to be exposed to the surface.

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