JP2011208848A - Dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mixing dryer capable of improving sealing performance between a filter and a suction pipe and securely suppressing suction of a stored object to the suction pipe side.SOLUTION: In the dryer, one end of the suction pipe is inserted to inside of a container, and suction is performed from a suction part provided at one end of the suction pipe to dry a powder and granular material within the container. A filter part covering the suction part from the tip over the longitudinal direction is detachably provided in the suction pipe. One end side of the filter part is closed and the other end side is opened to form an opening. A seal structure for sealing between the filter part and the suction pipe is provided. The seal structure includes: a receiving part provided in the middle in the longitudinal direction of the suction pipe side and swollen to the outer side of the suction pipe; a bent part formed by bending the opening side of the filter part; and an energizing means pressing the bent face of the bent part and a receiving face of the receiving part in the longitudinal direction.

Description

  The present invention relates to a drier such as a mixing drier for mixing and drying powders and the like.

A mixing dryer (also referred to as a double cone dryer) that inserts one end of a suction pipe (vacuum pipe) into the container, evacuates the container with the suction pipe, and mixes and drys the contents in the container. It has been proposed (see, for example, Patent Document 1).
Such a dryer simply leads to a pump that sucks in the container by inserting one end of the suction pipe into the container and sucks the contents from the suction pipe to evacuate the container. Covering the tip of the suction tube with a vacuum pipe filter so that the contained material is not sucked into the pump as much as possible, because the life of the product may be reduced or the yield of the contained material may be deteriorated. Yield reduction is suppressed.

JP 2009-275972 A

However, in the above-described conventional mixing dryer, there is described a configuration in which an O-ring is provided at the tip of the root portion of the vacuum pipe filter portion and the suction pipe and the vacuum pipe filter portion are sealed. The suction pipe is not sealed. For this reason, there is a problem that a gap is easily generated between the filter and the suction tube, and the object to be accommodated is easily sucked from the suction tube.
SUMMARY OF THE INVENTION An object of the present invention is to provide a mixing / drying machine capable of improving the sealing performance between a filter and a suction tube and reliably suppressing suction of an object to be sucked toward the suction tube.

  The present invention is a dryer in which one end portion of a suction tube is inserted into a container and sucked from a suction portion provided at one end portion of the suction tube to dry the granular material in the container. A filter part covering the longitudinal direction from the tip of the filter part is detachably provided on the suction pipe. One end side of the filter part is closed and the other end side is opened to form an opening. A sealing structure is provided for sealing the gap between the receiving part provided to bulge outwardly of the suction pipe in the longitudinal direction on the suction pipe side, and the opening of the filter part And a urging means for pressing the bent surface of the bent portion and the receiving surface of the receiving portion in the longitudinal direction.

In the above configuration, in order to cover the suction tube with the filter portion, the filter portion is covered from the opening to the longitudinal direction from the tip of the suction tube, and the bent portion of the filter portion and the receiving surface of the receiving portion are brought into contact with each other. The folding surface of the bent portion and the receiving surface of the receiving portion are pressed in the longitudinal direction by the biasing means of the seal structure, and the surfaces of the folded surface and the receiving surface are in close contact with each other, and the filter portion and the suction pipe Sealed.
The dryer of the present invention may be any type of dryer that rotates a container to dry the granular material, or a type that dries the granular material without rotating the container.

  In the dryer of the present invention, the folding surface of the bent portion and the receiving surface of the receiving portion are brought into contact with each other so that the suction portion is covered with the filter portion from the front end to the longitudinal direction, and the filter portion is arranged around the center in the longitudinal direction. By rotating, the folding surface of the bent portion and the receiving surface of the receiving portion are pressed in the longitudinal direction by the urging means, and the filter portion is configured to be attached to the suction pipe.

  In the above configuration, the filter unit is mounted on the suction tube by rotating the filter unit around the center in the longitudinal direction so as to cover the suction tube.

  In the dryer according to the present invention, the filter unit includes a filter main body and a holding body that is inside the filter main body and holds the shape of the filter main body. A press plate is provided in which the bent portion is overlapped from the outside and overlapped on the receiving surface of the receiving portion via the bent portion.

  In the above configuration, the folding surface of the bent portion of the filter portion is sandwiched between the holding plate of the holding body and the receiving surface of the receiving portion, and the filter portion and the suction pipe are sealed.

The dryer according to the present invention is characterized in that the container is configured to be rotated while being mixed while being dried.
In the above-described configuration, the granular material is mixed by rotating the container, and the granular material is dried by sucking the inside of the container from the suction tube to make a vacuum.

  The dryer according to the present invention includes a receiving portion provided so that a sealing structure between the suction portion and the filter portion covering the suction portion at the tip thereof bulges outward in the longitudinal direction on the suction tube side, and an opening of the filter portion A bent portion of the filter portion, and a receiving portion of the filter portion. The bent portion and the receiving portion of the filter portion are provided. When the contact surface is brought into contact, the urging means of the seal structure is pressed in the longitudinal direction between the folding surface of the bent portion and the receiving surface of the receiving portion, and the surfaces of the folded surface and the receiving surface are in close contact with each other. The sealing property between the filter and the suction pipe is improved. Thereby, it is possible to reliably suppress the suction of the powder (contained object) to the suction tube side, and to securely seal the filter portion and the suction tube.

Schematic side view of a container rotating type mixing dryer according to the first embodiment of the present invention. Also partially enlarged cross-sectional view Similarly, an enlarged side view of the main part Similarly, the main part enlarged plan view Similarly, single side view of the filter section Similarly bottom view Side view of essential part of seal structure portion showing second embodiment of the present invention The principal part side view of the seal structure part which shows 3rd embodiment of this invention The principal part side view of the seal structure part which shows 4th embodiment of this invention The other embodiment of a leaf | plate spring is shown, (a) is a side view, (b), (c) is a front view. Side view showing another embodiment of a leaf spring Side view showing another embodiment of a leaf spring The biasing means other than the leaf spring is shown, (a) is a side view, (b) is a front view. Enlarged side view of essential parts showing leaf spring deformation prevention means

  Hereinafter, a mixing dryer according to an embodiment of the present invention will be described with reference to the drawings, taking as an example a container rotating type mixing dryer for mixing and drying powder and the like. FIG. 1 is a schematic side view of a container rotating type mixer / dryer according to a first embodiment of the present invention, FIG. 2 is a partially enlarged sectional view, FIG. 3 is an enlarged side view of an essential part, and FIG. It is.

As shown in these drawings, the container rotating type mixer / dryer has a charging port 3 provided with a lid 2 that can be opened and closed at the upper end of a double cone type container 1. Has a discharge port 4 provided with a butterfly valve (not shown) and the like.
At the center of each side surface of the container 1, a shaft-like body 5 protrudes horizontally. A mounting base 7 is erected on the left and right sides of the base 6, and the shaft-like body 5 is rotatably supported by a bearing base 8 fixed to the upper end of the mounting base 7.

A motor 9 for rotating the container 1 is provided with a sprocket 10, and the power from the motor 9 is supplied to the container 1 through one shaft-like body 5 provided with the sprocket 10, the chain 11, and the sprocket 12. Thus, the container 1 is rotationally driven.
In addition, you may make it rotate a shaft directly with a motor using a worm reduction gear, without using a sprocket.

The container rotating type mixer / dryer has a suction tube 13 for sucking the container 1 so as to be in a vacuum state. The main body portion 16 of the suction pipe 13 is inserted into the other shaft-like body 5, and the main body one end 17 side of the main body portion 16 is inserted into the container 1.
The main body one end portion 17 corresponds to a suction portion, and a suction opening 17a is formed at the tip thereof.
A sheath tube 15 is provided in the container 1 via a suction tube 13. The sheath tube 15 is provided for attaching a thermometer or humidifying the inside of the container 1.

As shown in FIGS. 3 and 4, the main body one end portion 17 is detachably attached to the distal end of the main body portion 16 of the suction tube 13 through the insertion port 17 b. The main body one end portion 17 is made of, for example, stainless steel, and is integrally formed from a cylindrical portion 17 </ b> A and a receiving portion 28.
In addition, when making the cylindrical part 17b detachable with respect to the main-body part 16, it can be made detachable, maintaining a sealing performance by setting it as a screwed structure. Further, as another method, it is conceivable to be a fitting type, and in this case, when a gap portion is generated between both members due to the fitting of the cylindrical portion 17b and the main body portion 16, the gap portion is It is good also as a structure sealed with a sealing tape or a sealing material.
Moreover, the cylindrical part 17b and the main-body part 16 are good also as a structure fixed completely by welding.

The cylindrical portion 17A has a suction opening 17a formed at one end in the longitudinal direction and the insertion port 17b formed at the other end in the longitudinal direction. The receiving portion 28 is integrally formed so as to bulge outward in the radial direction from the middle in the longitudinal direction of the cylindrical portion 17A, and is formed in an annular shape.
The receiving portion 28 is formed in a flat plate shape, and one end side surface of the receiving portion 28 is a flat surface, which is a receiving surface 28a described later.

An annular flange 30 bent toward one end side is formed on the outer peripheral end of the receiving portion 28 so as to protrude over the entire circumferential direction of the receiving portion 28.
In the present embodiment, the protruding amount of the flange portion 30 is set to be approximately equal to the sum of the thicknesses of the folding surfaces 18 a and 18 b of the bent portion 23 of the filter body 18 described later and the thickness of the gasket 19. The inner diameter of the flange 30 is set to be slightly larger than the maximum outer diameter obtained by maximizing the filter body 18.
In addition, it is preferable to provide the collar part 30 from the point which prevents the shift | offset | difference of the filter part 14 and makes it easy to position at the time of attachment or detachment. However, this is not an essential configuration, and the collar portion 30 may not be provided.

The filter part 14 is detachably attached to the main body one end part 17. The filter unit 14 is provided for the purpose of preventing the powder particles in the container 1 from entering the vacuum side (in the suction tube 13 or a vacuum pump (not shown)).
The structure of the filter part 14 is demonstrated based on FIG. 5 and FIG. FIG. 5 is a single side view of the filter unit, and FIG. 6 is a bottom view.
As shown in these drawings, the filter section 14 includes the filter body 18, a gasket 19 (corresponding to a press plate) provided integrally with the filter body 18, and an inner side of the filter body 18. It is comprised from the holding body 21 holding the shape of this.

The filter body 18 is formed in a bag shape (a cylindrical shape in which the other end side is opened) in which one end side is closed and the other end side is opened to form an opening 22. The gasket 19 is made of a synthetic resin such as Teflon and is formed in an annular and flat plate shape.
The end of the filter body 18 on the opening 22 side is bent inward to form the bent portion 23, and the gasket 19 is surrounded by the bent portion 23 on the outer surface (outer peripheral surface).
Further, the bent portion 23 is sewn to the filter body 18 in a state of surrounding the gasket 19, so that the filter body 18 and the gasket 19 are integrally configured.

The holding body 21 is formed of a synthetic resin such as propylene as a whole, and a plurality of disc-shaped and flat bottom plates 24 and a top plate 25 having the same diameter are connected to each other in the longitudinal direction. It is comprised from the leg member 26 of a book. The leg member 26 connects the bottom plate 24 and the top plate 25 at their outer diameter side ends.
In the center of the bottom plate 24, an insertion hole 24a is formed through which the one end 17 of the main body of the suction tube 13 is inserted, and the mounting allowable notch 24b is arranged at a predetermined interval (in this case in the circumferential direction) toward the outer periphery in the radial direction of the insertion hole 24a. Formed at intervals of 180 °).
A locking groove 24c is formed between the mounting allowable notches 24b at a predetermined interval (in this case, a position rotated by 90 ° in the circumferential direction from the mounting allowable notches 24b).

The main body one end portion 17 is provided with a seal structure 27 for sealing between the filter portion 14 and the main body one end portion 17.
The seal structure 27 includes the receiving portion 28 provided in the middle of the main body one end portion 17 side (near the insertion port 17b), the bent portion 23 of the filter main body 18, the gasket 19, and a biasing means. It consists of and.
This urging means presses the one end side folding surface 18a of the bent portion 23 and the other end side plate surface 24e of the bottom plate 24 in the longitudinal direction, and the other end side bent surface 18b of the bent portion 23 and the receiving portion 28. It is an elastic body that presses and closely contacts the receiving surface 28a in the longitudinal direction.

As shown in FIG. 3, a leaf spring 31 is used as the biasing means. The leaf spring 31 is configured to press the bent portion 23 of the filter portion 14 against the receiving surface 28a of the receiving portion 28 when the filter portion 14 is mounted so as to cover the cylindrical portion 17A of the main body one end portion 17. Has been.
That is, the filter unit 14 is mounted on the one end portion 17 of the main body from the longitudinal direction so that the leaf spring 31 passes through the mounting allowable notch 24b, and the other end side folding surface 18b of the bent portion 23 and the receiving surface 28a of the receiving portion 28 , And the filter portion 14 is rotated about the longitudinal center, whereby the other end side folded surface 18b of the bent portion 23 and the receiving surface 28a of the receiving portion 28 are pressed in the longitudinal direction by the leaf spring 31. In addition, the one end side folding surface 18a of the bent portion 23 and the other end side plate surface 24e of the bottom plate 24 are configured to be pressed in the longitudinal direction.

Here, the structure of the leaf | plate spring 31 is demonstrated (refer FIG. 3 and FIG. 4).
The leaf spring 31 is formed with a predetermined width from a metal such as stainless steel, and has a mounting portion 33 fixed to the outer peripheral surface 17c of the main body one end portion 17 by a screw 32, and a radius of the suction tube from the mounting portion 33. It is integrally formed with the urging | biasing part 34 extended toward the direction outer side.

The attachment portion 33 includes an insertion piece 33a that enters the mounting hole 17d formed in the one end portion 17 of the main body, a screw stop piece 33b that extends from the end portion of the insertion piece 33a to one end side and contacts the outer peripheral surface 17c of the main body one end portion 17; Is formed integrally.
The urging portion 34 includes a curved portion 34a extending from the one end side of the screwing piece 33b toward the one end side and extending outward in the radial direction of the suction tube, and another end from the distal end of the curved portion 34a. An extension piece 34b extending toward the end side and a pressing piece 34c extending from the end portion of the extension piece 34b outward in the radial direction of the suction pipe are integrally formed.
The pressing piece 34c is integrally formed with a protrusion 35 projecting so as to bend toward the receiving surface 28a on the receiving surface 28a side of the tip. The protrusion 35 is formed by bending a metal portion extended from the pressing piece 34c. The protrusion 35 is a portion that fits into a locking groove 24 c formed in the bottom plate 24.
In this embodiment, the leaf springs 31 having the above-described configuration are provided at predetermined intervals (in this case, at 180 ° intervals) in the circumferential direction of the main body one end portion 17.

The attachment position of the leaf spring 31 (attachment portion 33) to the main body one end portion 17 is set at a position where the projection 35 is separated from the receiving surface 28a by a predetermined amount toward one end side.
This predetermined amount is an amount smaller than the distance from the one end side plate surface 24d of the bottom plate 24 in the filter portion 14 to the other end side bent surface 18b of the bent portion 23. In other words, when the filter unit 14 is attached to the one end portion 17 of the main body, the leaf spring 31 (particularly the urging portion 34) is elastically deformed, and the folding surface 18a on the one end side of the bent portion 23 is sufficiently pressed. And the other end side plate surface 24e of the bottom plate 24 are pressed in the longitudinal direction, and the other end side folded surface 18b of the bent portion 23 and the receiving surface 28a of the receiving portion 28 can be pressed in the longitudinal direction.

  In the container rotating type mixer / dryer having the above-described configuration, when the motor 9 is driven, the power from the motor 9 is transmitted to the container 1 through one shaft-like body 5 provided with the sprocket 10, the chain 11, and the sprocket 12. Thereby, the container 1 is rotationally driven. When the container 1 is rotationally driven, the granular material accommodated in the container 1 is mixed, and on the other hand, the granular material is dried by sucking the inside of the container 1 by driving a vacuum pump (not shown).

Here, the procedure for attaching the filter part 14 to the main body one end part 17 and the operation will be described.
The operator grasps the filter unit 14 with fingers, inserts the filter unit 14 into the main body one end portion 17 from one end side in the longitudinal direction so that the leaf spring 31 passes through the mounting allowance notch 24b, and the other end side of the bent portion 23. The folding surface 18b and the receiving surface 28a of the receiving portion 28 are brought into contact with each other. At this time, even if the filter main body 18 is flexible, the filter main body 18 can be held in the cylindrical shape by being held by the holding body 21, so that the operator firmly holds the filter portion 14. can do.

  Subsequently, the filter unit 14 is rotated around the center in the longitudinal direction. Here, the leaf spring 31 is separated from the receiving surface 28a of the receiving portion 28 by the predetermined amount. Therefore, when the filter portion 14 is rotated about the longitudinal center after the one end side folding surface 18a of the bent portion 23 and the receiving surface 28a of the receiving portion 28 are brought into contact with each other, the protrusion 35 of the leaf spring 31 is allowed to be attached. The urging portion 34 of the leaf spring 31 is elastically deformed by an amount corresponding to the amount of displacement of the projection 35 from the notch 24b to the one end side plate surface 24d of the bottom plate 24, and the elasticity corresponding to the amount of elastic deformation. With the restoring force, the projection 35 presses the one end side plate surface 24d to the other end side.

Thereby, the one end side folding surface 18a of the bent portion 23 and the other end side plate surface 24e of the bottom plate 24 are pressed in the longitudinal direction, and the other end side bent surface 18b of the bent portion 23 and the receiving surface of the receiving portion 28 are also pressed. 28a is pressed and adhered in the longitudinal direction.
At this time, even if the projection 35 presses the one end side plate surface 24d of the bottom plate 24 in a point contact manner, the pressing force is distributed to the bottom plate 24, and the adhesion force between the seal surfaces can be made uniform.

  Next, when the filter portion 14 is further rotated around the longitudinal center (in this case, 90 ° with respect to the time when the leaf spring 31 has passed through the mounting allowable notch 24b), the projection 35 is fitted into the locking groove 24c. To do. By fitting the protrusion 35 into the locking groove 24 c, the filter portion 14 is prevented from rotating, and the filter portion 14 can be securely attached to the one end portion 17 of the main body. Further, it can be determined that the filter portion 14 is securely attached to the one end portion 17 of the main body by the click feeling generated when the protrusion 35 is fitted into the locking groove 24c.

As described above, according to the embodiment of the present invention, the filter unit 14 can be obtained by an extremely easy operation of rotating the filter unit 14 so that the bent portion 23 of the filter unit 14 (filter body 18) is in contact with the receiving unit 28. Can be securely attached to the one end portion 17 of the main body. For this reason, it is possible to reduce the burden on the operator when the filter unit 14 is replaced or assembled.
Moreover, due to the elasticity of the leaf spring 31, the filter portion 14 and the receiving portion 28 can be brought into close contact with each other, and the sealing performance between the main body one end portion 17 and the filter portion 14 can be improved. Therefore, even if the filter part 14 sucks the inside of the container 1 from the suction opening 17a of the main body one end part 17 by driving the vacuum pump, the granular material etc. is attached from the attachment part of the receiving part 28 and the filter part 14, that is, the seal part. It is possible to reliably prevent the state of being mixed into the vacuum side (in the suction tube 13 or the vacuum pump).

  Further, when the filter unit 14 is removed in order to replace the filter unit 14, the filter unit 14 can be easily detached from the one end portion 17 of the main body by performing an operation reverse to the above-described attachment procedure. That is, as a removal procedure, the filter portion 14 is rotated against the elasticity of the leaf spring 31 to disengage the fitting between the protrusion 35 and the locking groove 24c, and the mounting allowance notch 24b corresponds to the leaf spring 31. Since there is no part which latches the filter part 14 to the one end part 17 of the main body, the filter part 14 can be detached from the receiving part 28 by moving the filter part 14 to one end side.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
In the above embodiment, the main body one end portion 17 is attached to the suction pipe 13 and the filter portion 14 is further attached to the main body one end portion 17. However, the filter portion 14 is attached to the main body one end portion 17 in advance as an assembly. Alternatively, this assembly may be configured to be attached to the suction tube 13.

Further, the seal structure 27 is not limited to the above embodiment.
For example, FIG. 7 shows a second embodiment of the present invention. FIG. 7 is a side view of a seal structure portion showing a second embodiment. In the sealing structure in the second embodiment, a sealing property between the main body one end portion 17 and the filter portion 14 is ensured without using the leaf spring 31.

More specifically, the gasket 19 itself is made of a material rich in elasticity (cushioning), and the degree of adhesion between the receiving surface 28a of the receiving portion 28 and the folded surface 18b on the other end side of the filter body 18 and the bottom plate 24 This is a configuration in which the adhesion between the other end side plate surface 24e and the one end side folded surface 18a is increased.
In the second embodiment, the pressing member 40 is provided at the same position as the leaf spring 31 provided in the first embodiment (the circumferential position and the longitudinal position of the outer circumferential surface 17c of the main body one end portion 17). The holding member 40 is formed of a plate-like member that is set to have the same width and length as the plate spring 31 and extends only radially outward with respect to the outer peripheral surface 17 c of the main body one end portion 17.

  According to this configuration, when the filter portion 14 is attached to the one end portion 17 of the main body in the same manner as in the first embodiment, the holding member 40 resists the elasticity of the gasket 19 and folds with the receiving surface 28a of the receiving portion 28. The other end side folded surface 18b of the bent portion 23, the other end side plate surface 24e of the bottom plate 24, and the one end side folded surface 18a of the bent portion 23 are brought into close contact with each other, and the gap between the main body one end portion 17 and the filter portion 14 is securely sealed. can do.

FIG. 8 shows a third embodiment of the present invention. FIG. 8 is a side view of the seal structure portion showing the third embodiment. Similarly to the second embodiment, the seal structure in the third embodiment has a structure in which the sealing performance between the main body one end portion 17 and the filter portion 14 is ensured without using the leaf spring 31.
In the first embodiment and the second embodiment, the plate spring 31 or the pressing member 40 provided at the same position as the plate spring 31 is used to press the bottom plate 24 of the holding body 21 with its one end side plate surface 24d.

  On the other hand, in the third embodiment, apart from the bottom plate 24, the holding member 41 pressed by the holding member 40 (or the plate spring 31) is separated from the bottom plate 24 toward one end side. By providing and pressing the pressed member 41 in the longitudinal direction by the pressing member 40 (or the plate spring 31), the receiving surface 28a and the other end side folding surface 18b of the receiving portion 28, the other end side plate surface 24e of the bottom plate 24, and It is comprised so that the one end side folding surface 18a may be stuck.

Therefore, the separation distance in the longitudinal direction between the pressing member 40 and the receiving portion 28 in the third embodiment is larger than that in the first embodiment and the second embodiment.
In the first embodiment and the second embodiment, the bottom plate 24 is used as a pressed member. On the other hand, in the third embodiment, a pressed member 41 is provided separately from the bottom plate 24, and the pressed member 41 is positioned higher in the axial direction of the filter unit 14 than the bottom plate 24 (on one end side in the longitudinal direction). ).
For this reason, when an external force is applied to the filter unit 14 from the outside (particularly, a moment force that causes the filter unit 14 to be detached from the receiving unit 28), the filter unit 14 is compared with the case where the filter unit 14 is pressed by the lower portion thereof. The load due to external force can be reduced. Therefore, the shape retention of the holding body 21 (filter part 14) can be ensured accordingly. Alternatively, the load applied to the pressing member 40 can be reduced.

  FIG. 9 shows a fourth embodiment of the present invention. In the fourth embodiment, the flange portion 30 is not provided in the receiving portion 28, the receiving portion 28 is formed in a flat truncated cone shape having a small diameter on one end side, and the outer surface of the receiving portion 28 is an inclined surface 28b. In the holding body 21, an annular flange portion 210 that protrudes in the longitudinal direction from the outer peripheral portion of the other end side plate surface 24 e of the bottom plate 24 is integrally formed. In the gasket 19, the inner peripheral surface 19a is inclined so as to coincide with the inclined surface 28b. The filter body 18 is extended in the longitudinal direction so as to cover the flange portion 210, and integrally includes a bent portion 23 surrounding the entire gasket 19 so as to cover the entire flange portion 210.

In the fourth embodiment, the portion constituted by the gasket 19 and the bent portion 23 is sandwiched between the bottom plate 24 and the receiving portion 28 in the longitudinal direction of the cylindrical portion 17A, and is received in the radial direction of the cylindrical portion 17A. It is sandwiched between the portion 28 and the collar portion 210.
In a state in which the filter portion 14 is attached to the one end portion 17 of the main body, in the bent portion 23 of the filter main body 18, the folding surface 18 c that covers the inner peripheral surface 19 a of the gasket 19 The folding surface 18d that is tightly sandwiched between the peripheral surface 19a and covers the outer peripheral surface 19b of the gasket 19 in the bent portion 23 is tightly sandwiched between the outer peripheral surface 19b of the gasket 19 and the inner peripheral surface 210a of the flange portion 210. Further, the one end side folding surface 18 a of the bent portion 23 is tightly sandwiched between the gasket 19 and the bottom plate 24. The other end side folding surface 18 b of the bent portion 23 is substantially flush with the other end side surface 28 c of the receiving portion 28. Since other configurations are the same as those of the first embodiment, the same reference numerals are given and description thereof is omitted.

In the fourth embodiment, the gasket 19 is pressed in the longitudinal direction via the bottom plate 24 by the elasticity of the leaf spring 31 in a state in which the filter portion 14 is attached to the one end portion 17 of the main body, thereby The one end side folding surface 18 a is tightly sandwiched between the gasket 19 and the bottom plate 24.
The folding surface 18c is tightly sandwiched between the inclined surface (the inclined surface 28b and the inner peripheral surface 19a) by the inclined surface 28b of the receiving portion 28 and the inner peripheral surface 19a of the gasket 19. Since the receiving portion 28 and the gasket 19 are opposed to each other between the inclined surface 28b and the inner peripheral surface 19a via the folding surface 18c, the elasticity of the leaf spring 31 is a force in a direction in which the diameter of the gasket 19 is expanded. As a result, the folded surface 18d is tightly sandwiched between the outer peripheral surface 19b of the gasket 19 and the inner peripheral surface 210a of the flange portion 210 in the radial direction.
Thereby, the sealing performance between the main body one end portion 17 and the filter portion 14 can be improved.

10 to 12 show another embodiment of the leaf spring. In these embodiments, portions having the same functions as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
In the case shown in FIG. 10, the mounting portion 33 and the urging portion 34 in the leaf spring 31 of the first embodiment are reversed on one end side and the other end side. (A) is a side view, (b) and (c) are front views, and (b) and (c) show projections 35 of different forms. In (b), the protrusion 35 shows the example formed by curving the metal part extended from the press piece 34c. (C) shows an example in which a projection 35 made of synthetic resin is fixed to the pressing piece 34c.
The leaf spring 31 of FIGS. 11 and 12 has a shape in which the urging portion 34 is formed flat, and has a configuration in which the insertion piece 33a and the screwing piece 33b are reversed on one side and the other side.

FIG. 13 shows urging means other than the leaf spring. (A) is a side view, (b) is a front view. The urging means shown in the example of this figure shows a configuration in which a metal round bar is formed into a predetermined shape and is given elasticity to form a round bar body 45 instead of a leaf spring.
The round bar 45 is integrally formed from an attachment portion 46 fixed to the outer peripheral surface 17 c of the one end portion 17 of the main body and an urging portion 47 extended outward from the attachment portion 46.
The attachment portion 46 includes an insertion piece 46a that is inserted and fixed in a mounting hole 17d formed in the one end portion 17 of the main body, and a stop piece that extends from the end portion of the insertion piece 46a to one end side and contacts the outer peripheral surface 17c of the main body one end portion 17. 46b is integrally formed.
The urging portion 47 extends from the one end side of the stop piece 46b to the outer side while curving so as to protrude toward the one end side, and extends from the tip of the bending portion 47a to the other end side. The extension piece 47b and the pressing piece 47c extending outward from the end of the extension piece 47b are integrally formed.
The pressing piece 47c is formed in the shape of a protrusion that protrudes so that its tip is curved toward the receiving surface 28a. This pressing piece 47c is formed by curving a round bar metal portion. The pressing piece 47 c is a portion that fits into the locking groove 24 c formed in the bottom plate 24.
In each of the above embodiments, the filter main body is bent inward to provide the bent portion, but the filter main body may be bent outward to provide the bent portion. In this case, by providing an urging means on the receiving portion side, the bent portion can be configured to press in the longitudinal direction when the bent portion abuts on the receiving surface of the receiving portion.

Moreover, in each said embodiment, in the holding body 21, although the mounting | wearing permissible notch 24b is provided in two places (position rotated 180 degrees), it is not limited to this, Three places (position rotated 120 degrees) Or you may make it provide in four places (position rotated 90 degrees).
In addition, the locking groove 24c is provided to clarify the location where the filter portion 14 is locked when locked, but it is not necessary to provide the locking groove 24c. Even when the locking groove is provided, the place to be provided is not particularly limited. However, in order to prevent misidentification at the time of attachment / detachment, for example, in the case where the attachment allowable notches 24b are provided at two places (position rotated by 180 °). Provided at a position rotated by 30 ° to 120 ° from the allowable mounting notch 24b, and provided at three positions (position rotated by 120 °), provided at a position rotated by 30 ° to 90 ° from the allowable mounting notch 24b. When it is provided (position rotated 90 °), it is preferably positioned 30 ° to 60 ° rotated from the mounting allowable notch 24b.

Further, in the leaf spring 31, the attachment portion 33 has a structure having an insertion piece 33a that enters the mounting hole 17d formed in the one end portion 17 of the main body, but this is not an essential component, and the insertion piece 33a and the mounting portion are not provided. It is not necessary to provide the hole 17d.
Furthermore, the mounting method of the mounting portion 33 is not limited to screwing, and may be performed by welding or the like.

Further, the gasket is stitched to the filter main body 18 in a state where the gasket 19 surrounds the gasket 19 so that the filter main body and the gasket are integrally formed. However, the present invention is not limited to this configuration, and it may be configured such that the semi-annular gasket member and one end are sewn into a bag shape, a cut is made in a part of the stitched portion, and the gasket member is inserted from the cut. .
Further, the gasket is not limited to a flat plate having a square or rectangular cross section, and may have a circular (or oval) cross section.

  Further, when a leaf spring is used as the biasing means, when a load is applied to the filter unit 14 in a direction away from the receiving surface 28 during operation of the container rotary type mixing dryer or when the filter unit 14 is replaced. It is possible that an excessive load is applied to the leaf spring (including a load that is not uniform but biased), and the leaf spring itself is damaged or plastically deformed. In order to prevent this, when a load more than necessary is generated in the leaf spring, it is preferable to provide a plate spring deformation preventing means so that the leaf spring is not further deformed.

  FIG. 14 shows an example of the leaf spring deformation preventing means 50. In this case, a bar-shaped or square-shaped member is used as the plate spring deformation preventing means 50. Specifically, the plate spring deformation preventing means 50 is received at the same position in the circumferential direction as the plate spring and the bottom surface (surface close to the receiving surface 28a) is received from the bottom surface of the projection 35 (surface contacting the receiving surface 28a). It is attached to the cylindrical portion 17A so as to be away from the surface 28a and closer to the receiving surface 28a than the pressing piece 34c. Thus, even if an excessive load is applied to the leaf spring, the leaf spring deformation preventing means 50 prevents the bottom plate 24 from moving more than necessary in the direction away from the receiving surface 28a. Application of a load can be suppressed, and plastic deformation of the leaf spring can be suppressed.

  DESCRIPTION OF SYMBOLS 1 ... Container, 13 ... Suction tube, 14 ... Filter part, 16 ... Main body part, 17 ... Main body one end part, 17A ... Cylindrical part, 18 ... Filter main body, 18a ... One end side folding surface, 18b ... Other end side folding surface , 19 ... Gasket, 21 ... Holding body, 23 ... Bent part, 24 ... Bottom plate, 24a ... Insertion hole, 24b ... Mounting allowance notch, 24c ... Locking groove, 24d ... One end side plate surface, 24e ... Other end side plate surface 25 ... Top plate, 26 ... Leg member, 27 ... Seal structure, 28 ... Receiving portion, 28a ... Receiving surface, 28b ... Inclined surface, 30 ... Gutter, 31 ... Leaf spring, 35 ... Projection

Claims (4)

One end of the suction tube is inserted into the container, and is a dryer for sucking from the suction unit provided at one end of the suction tube to dry the powder in the container,
A filter part that covers the suction part from its distal end in the longitudinal direction is detachably provided on the suction pipe, one end side of the filter part is closed and the other end side is opened to form an opening,
A seal structure is provided for sealing between the filter portion and the suction pipe;
The seal structure includes a receiving portion provided so as to bulge outward of the suction tube in the longitudinal direction on the suction tube side, a bent portion obtained by bending the opening side of the filter portion, and the folding A drier having an urging means for pressing the bent surface of the curved portion and the receiving surface of the receiving portion in the longitudinal direction.   The folding surface of the bent portion and the receiving surface of the receiving portion are brought into contact with each other so that the suction portion is covered with the filter portion from the tip to the longitudinal direction, and the filter portion is rotated around the center in the longitudinal direction. The dryer according to claim 1, wherein the folding surface of the portion and the receiving surface of the receiving portion are pressed in the longitudinal direction by the urging means, and the filter portion is attached to the suction pipe.   The filter part is composed of a filter main body and a holding body that is inside the filter main body and holds the shape of the filter main body, and a folded part of the filter main body is overlapped from the outside at the other end of the holding body. The dryer according to claim 1, further comprising a pressing plate that is overlapped with the receiving surface of the receiving portion via the bent portion.   The dryer according to any one of claims 1 to 3, wherein the container is configured to be dried while being mixed by rotating the granular material.

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