JP6029428B2 - Air filter device - Google Patents

Description

  The present invention relates to an air filter device that removes dust contained in air.

  Conventionally, an air filter device that removes dust contained in air includes, for example, a filter case in which a filter housing space is formed by an upper wall, a side wall, and a lower wall, as disclosed in Patent Document 1, An air inflow port is formed in the upper wall, and an air outflow port is formed in the lower wall. The filter housing space accommodates a cylindrical air filter that opens only at one end, and the one end opening of the air filter is connected to the air inlet, while the filter case has a side wall, a lower wall, and an air filter. Is provided with a gap. The air flowing into the air filter from the air inflow port passes through the air filter from the inside to the outside, and then moves through the gap between the filter case and the air filter so as to flow out of the air outflow port. It has become. The dust removed by the air filter stays inside the air filter, and when the air filter is replaced, the dust once captured by the air filter falls into the filter case and exits with air from the air outlet. It can be prevented.

JP 2006-88104 A (paragraphs 0016 to 0029, FIGS. 1 and 2)

  By the way, although it is necessary to replace | exchange an air filter regularly, if clogging is early, a replacement period must be shortened and a running cost will increase.

  However, in the air filter device of Patent Document 1, no consideration is given to extending the replacement period of the air filter.

  This invention is made | formed in view of such a point, The place made into the objective is to provide the air filter apparatus which can suppress the increase in running cost by extending the replacement period of an air filter.

  In order to achieve the above object, the present invention is characterized in that the tubular air filter can be expanded and contracted in the direction of the center line of the cylinder while being accommodated in the filter case.

  That is, according to the first aspect of the present invention, the filter has an upper wall formed with an air inlet, a side wall formed with an air outlet, and a lower wall formed with a dust discharge port. A filter case in which a space is formed, and both ends are open, and are accommodated in the filter housing space so that one end side opening is detachably connected to the air inlet and the other end side opening is detachably connected to the dust outlet. A cylindrical air filter, expansion / contraction operation means for expanding and contracting the air filter in a direction along the cylinder center line, and air flowing in from the air inlet to the outside through the air filter. When capturing dust in the process of flowing out of the filter, the dust discharge port is closed, while when dust remaining inside the air filter is discharged outside the filter case, the dust discharge port is closed. Characterized in that it includes a Ku-off means.

  The second invention is characterized in that, in the first invention, a filter urging means for constantly expanding and urging the air filter is provided inside the air filter.

  In a third invention, in the first or second invention, the expansion / contraction operation means is an operation handle that is gripped by an operator and expands / contracts the air filter, and is inserted into the dust discharge port so as to be vertically movable. A cylindrical gripping part that communicates the inside of the air filter with the outside of the filter case, and a filter support part that is connected to one end side of the cylindrical gripping part and supports the opening on the other end side of the air filter. It is characterized by being.

  According to a fourth invention, in the third invention, the filter support portion is constantly urged upward by a filter support portion urging means.

  According to a fifth aspect, in the third or fourth aspect, the filter support portion has a conical shape that expands sideward as it goes upward.

In a sixth aspect based on the second aspect , the filter urging means includes a pair of annular frames that support the peripheral edges of the both ends of the air filter, and the annular frame that extends radially from the center of the annular frame. A reinforcement frame connected to the cylinder, a cylinder member extending along the cylinder center line of the air filter, a cylinder member having one end connected to one reinforcement frame and having the other end opened, and extending along the cylinder center line of the air filter. , One end side is slidably inserted into the cylinder member, and the other end is connected to the other reinforcing frame, and the rod member is housed inside the cylinder member, and protrudes from the cylinder member. And a spring member that is constantly biased.

  In the first invention, when the air filter is expanded and contracted by the expansion / contraction operation means, dust sticking to the inner surface of the air filter falls. Therefore, the progress of clogging of the air filter can be delayed to extend the replacement period, and an increase in running cost can be suppressed. In addition, dust that has fallen from the inner surface of the air filter can be discharged from the dust outlet by the opening and closing means, so that dust does not stay inside the air filter, and when the air filter is replaced, the dust once captured by the air filter is filtered. It can prevent falling into the case and going out with air from the air outlet.

  In the second aspect of the invention, the air filter is extended by the filter urging means and the filter area can be maintained widely, so that dust can be captured efficiently. On the other hand, the air filter is made smaller by shrinking the air filter inward along the cylinder center line direction against the urging force of the filter urging means, and the air filter can be easily removed from the filter case.

  In the third invention, since the air filter expands and contracts when the operator holds the operation handle and moves it up and down, the expansion and contraction operation of the air filter can be easily performed.

  In the fourth invention, the filter support portion firmly adheres to the periphery of the other end opening of the air filter by the urging force of the filter support portion urging means, so that the other end opening periphery of the air filter is unexpectedly detached from the filter support portion. Can be prevented.

  In the fifth aspect of the invention, the dust falling from the inner surface of the air filter moves along the filter support portion and collects in the cylindrical gripping portion opening, so that the dust can be smoothly collected from the inside of the air filter via the cylindrical gripping portion. It can be discharged.

  In the sixth aspect of the invention, since there is only a reinforcing frame inside the annular frame, the air flowing from the air inlet can be smoothly guided into the air filter. In addition, since the cylinder member and the bar are provided along the cylinder center line, the air flowing into the air filter from the air inflow port is not blocked by the cylinder member and the bar, and flows from the inside of the air filter to the outside. Can pass through.

It is a perspective view of an air filter device concerning Embodiment 1 of the present invention. It is a disassembled perspective view of the air filter apparatus which concerns on Embodiment 1 of this invention. It is sectional drawing in the AA of FIG. 1, and shows the state just before operating an operation handle. It is sectional drawing in the AA of FIG. 1, and shows the state in the middle of operating the operation handle. FIG. 4 is a view corresponding to FIG. 3 according to Embodiment 2 of the present invention. FIG. 6 is a view corresponding to FIG. 3 according to Embodiment 3 of the present invention, showing a state in the middle of replacing the air filter.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.
Embodiment 1 of the Invention
1 and 2 show an air filter device 1 according to Embodiment 1 of the present invention. The air filter device 1 is for capturing dust from the discharge air of a hopper dryer attached to an injection molding machine (not shown). A cylindrical air filter 3 made of non-woven fabric and an operation handle 4 (extension / retraction operation means) for an operator to hold and operate.

  The filter case 2 has an upper wall 21, a side wall 22, and a lower wall 23, and a filter housing space 20 is formed on the inner side surrounded by these three walls.

  One surface of the side wall 22 constitutes a lid cover 24, and the filter housing space 20 is opened by removing the lid cover 24.

  A circular air inlet 21a is formed in the center of the upper wall 21, and a circular dust outlet 23a having a smaller diameter than the air inlet 21a is formed through the center of the lower wall 23 so as to face each other. ing.

  An inflow-side annular ridge 21b is provided on the periphery of the air inlet 21a. A downstream end of the air inflow pipe 25 is connected to the inflow-side annular ridge 21b.

  Further, as shown in FIG. 3 or 4, an annular guide plate 21 c having a diameter larger than that of the air inlet 21 a is provided to project downward around the air inlet 21 a on the lower surface of the upper wall 21.

  Further, a circular air outlet 22 a is formed through the upper half of the side wall 22. On the periphery of the air outlet 22a, an outflow side annular ridge 22b projects outward, and an upstream end of an air outflow pipe 26 is connected to the outflow side annular ridge 22b.

  Inside the air filter 3, a filter urging tool 5 (filter urging means) that constantly stretches and urges the air filter 3 is provided. And a reinforcing frame 52 that extends from the center of the annular frame 51 to both sides in the radial direction and is connected to the annular frame 51.

  The filter biasing tool 5 includes a cylindrical member 53 and a bar 54 that extend along the cylindrical center line.

  One end of the cylindrical member 53 is connected to the center of one (upper) reinforcing frame 52, and the other end (lower end) is open.

  One end side of the bar 54 is slidably inserted into the cylindrical member 53, and the other end is connected to the center of the other (downward) reinforcing frame 52.

  A first coil spring 6 (spring member) is accommodated inside the cylindrical member 53, one end of the first coil spring 6 is fixed to one end side of the cylindrical member 53, and the other end is the rod member. The first coil spring 6 is constantly biased in a direction in which the bar 54 protrudes from the cylindrical member 53.

  The operation handle 4 is connected to a cylindrical grip 41 that is movably inserted in the dust discharge port 23a, and an upper end (one end side) of the cylindrical grip 41. A disc-shaped filter support portion 42 extending outward in the horizontal direction from the peripheral edge of the opening, and an annular extension portion 43 extending upward from the outer peripheral edge of the filter support portion 42 are provided.

  A second coil spring 7 (filter support urging means) is wound around the cylindrical grip 41, one end of which is on the lower surface of the filter support 42, and the other is the upper surface of the lower wall 23 of the filter case 2. The filter support portion 42 is always urged upward.

  And the said air filter 3 is accommodated in the said filter accommodation space 20 in the state shrunk in the cylinder centerline direction against the urging | biasing force (spring force of the 1st coil spring 6) of the said filter urging tool 5, and one end side opening is carried out. Is extended by the urging force of the filter urging tool 5 with the other end side opening corresponding to the air inlet 21a and the other end side opening corresponding to the filter support portion 42, the one end side opening periphery of the air filter 3 is While supported by the lower surface of the upper wall 21, the opening periphery of the other end is supported by the filter support portion 42.

  On the other hand, when the air filter 3 is housed in the filter housing space 20 and the air filter 3 is contracted in the cylinder center line direction against the urging force of the filter urging tool 5, one end of the air filter 3 is obtained. The side opening periphery is separated from the lower surface of the upper wall 21 and the other end opening periphery is separated from the filter support portion 42 so that the air filter 3 can be taken out from the filter housing space 20.

  That is, the air filter 3 is housed in the filter housing space 20 so that one end side opening is detachably connected to the air inflow port 21a and the other end side opening is detachably connected to the dust discharge port 23a.

  In addition, with the one end side opening of the air filter 3 connected to the air inlet 21a and the other end side opening connected to the dust discharge port 23a, the inside of the air filter 3 and the filter case are formed by the cylindrical gripper 41. 2 The outside communicates with each other, and when the operation handle 4 is moved up and down, the air filter 3 expands and contracts in a direction along the cylinder center line.

  In the first embodiment of the present invention, the air filter 3 is accommodated in the filter case 2 in such a posture that the cylindrical member 53 is positioned upward and the bar 54 is positioned downward. The air filter 3 may be accommodated in the filter case 2 in a posture in which 54 is positioned upward. When the cylindrical member 53 is positioned downward, dust in the exhaust air flowing in from the air inlet 21a with the opening of the cylindrical member 53 facing upward tends to stay inside the cylindrical member 53, so the air filter 3 is preferably housed in the filter case 2 in a posture in which the cylindrical member 53 is positioned upward.

  A cap 44 (opening / closing means) is attached to the lower end of the cylindrical gripping portion 41 so as to open and close the lower end opening of the cylindrical gripping portion 41, and the cap 44 allows air flowing in from the air inlet 21a. When capturing dust in the process of passing from the inside of the air filter 3 to the outside and discharging from the air outlet 22a, the dust outlet 23a is closed while the dust staying inside the air filter 3 is closed. Is discharged to the outside of the filter case 2, the dust discharge port 23a is opened.

  Next, dust capture by the air filter device 1 will be described.

  First, as shown in FIG. 3, a hopper dryer (not shown) is operated in a state where the lower end opening of the cylindrical grip 41 is closed with the cap 44. Then, the exhaust air in the hopper dryer flows into the air filter 3 from the air inlet 21a, passes from the inside of the air filter 3 to the outside, and dust contained in the exhaust air is captured. It flows out from the air outlet 22a.

  Next, an operation for extending the replacement period of the air filter 3 will be described.

  First, in a state where a hopper dryer (not shown) is stopped, as shown in FIGS. 3 and 4, the operator holds the cylindrical holding portion 41 whose lower end opening is closed by the cap 44 and moves up and down. Let Then, the air filter 3 expands and contracts in the cylinder center line direction, and the dust adhering to the inside of the air filter 3 falls downward.

  Thereafter, the operator removes the cap 44 from the cylindrical grip 41. Then, the dust staying inside the air filter 3 is discharged from the inside of the air filter 3 to the outside of the filter case 2 through the cylindrical grip portion 41.

  And after discharging the dust which stays in the air filter 3, the cap 44 is attached to the lower end of the cylindrical holding part 41, and the operation | movement of the hopper dryer which is not shown in figure is restarted.

  As described above, according to the first embodiment of the present invention, when the air filter 3 is expanded and contracted by the operation handle 4, dust clinging to the inner surface of the air filter 3 falls. Therefore, the progress of clogging of the air filter 3 can be delayed to extend the replacement period, and an increase in running cost can be suppressed. In addition, dust that has fallen from the inner surface of the air filter 3 can be discharged from the dust discharge port 23a by the cap 44, so that dust does not stay inside the air filter 3 and is once captured by the air filter 3 when the air filter 3 is replaced. It is possible to prevent the dust that has fallen into the filter case 2 from going out together with the air from the air outlet 22a.

  Moreover, since the air filter 3 is extended by the filter urging tool 5 and the filter area can be maintained widely, dust can be captured efficiently. On the other hand, the air filter 3 can be reduced by shrinking the air filter 3 inward along the cylinder center line direction against the urging force of the filter urging tool 5, and the air filter 3 can be easily removed from the filter case 2. it can.

  Furthermore, since the air filter 3 expands and contracts when the operator holds the operation handle 4 and moves it up and down, the air filter 3 can be easily expanded and contracted.

  In addition, since the filter support portion 42 is firmly attached to the peripheral edge of the other end opening of the air filter 3 by the biasing force of the second coil spring 7, the peripheral edge of the other end opening of the air filter 3 is unexpectedly detached from the filter support portion 42. Can be prevented.

Since only the reinforcing frame 52 is provided inside the annular frame 51, the air flowing in from the air inlet 21a can be smoothly guided into the air filter 3. Further, since the cylindrical member 53 and the bar 54 are provided along the cylinder center line, the air flowing into the air filter 3 from the air inlet 21a is not blocked by the cylindrical member 53 and the bar 54. 3 can pass from the inside to the outside.
<< Embodiment 2 of the Invention >>
FIG. 5 shows an air filter device 1 according to Embodiment 2 of the present invention. In the second embodiment, only the shape of the filter support part 42 is different from that of the first embodiment, and the other parts are the same as those of the first embodiment. Therefore, only the parts different from the first embodiment will be described below.

  The filter support portion 42 of the second embodiment has a conical shape that expands sideward as it goes upward, and supports the lower end opening edge of the air filter 3 in the vicinity of the outer peripheral edge thereof.

  In addition, since the operation | work for catching the dust by the air filter apparatus 1 of Embodiment 2 and extending the replacement period of the air filter 3 is the same as Embodiment 1, detailed description is abbreviate | omitted.

Therefore, according to the second embodiment of the present invention, the dust falling from the inner surface of the air filter 3 moves along the filter support portion 42 and collects at the opening of the cylindrical grip portion 41. Dust can be discharged smoothly through the grip portion 41.
<< Embodiment 3 of the Invention >>
FIG. 6 shows an air filter device 1 according to Embodiment 3 of the present invention. In the third embodiment, the upper wall 21 of the filter case 2 constitutes a lid cover 24, and only the manner in which the air filter 3 is attached to and detached from the filter housing space 20 is different from that of the first embodiment. Therefore, how to attach and detach the air filter 3 according to the third embodiment will be described below.

  In the third embodiment, the air filter 3 is inserted into the filter housing space 20 from the upper opening of the filter case 2, and the other end side opening of the air filter 3 is made to correspond to the filter support portion 42. The upper wall 21 with the air inlet 21 a corresponding to the opening on one end side of the filter 3 is moved downward against the urging force of the first coil spring 6 and the second coil spring 7 to fix the upper wall 21 to the side wall 22. Thus, the air filter 3 is accommodated in the filter accommodation space 20.

  On the other hand, in the third embodiment, when the upper wall 21 is removed from the side wall 22, the one end side of the air filter 3 jumps out of the opening portion of the filter case 2 due to the urging force of the first coil spring 6 and the second coil spring 7. The air filter 3 is taken out from the filter housing space 20 by gripping.

  Therefore, according to the third embodiment of the present invention, when the air filter 3 is accommodated in the filter accommodating space 20, the operation of contracting the air filter 3 in the cylinder center line direction is performed on the side wall 22 of the upper wall 21 constituting the lid cover 24. Therefore, the air filter 3 can be easily accommodated in the filter accommodating space 20 as compared with the first embodiment.

  In the first and second embodiments of the present invention, the operation handle 4 is provided at the lower part of the filter case 2, but not limited to this position, the air filter 3 can be expanded and contracted in the direction along the cylinder center line direction. If so, it may be provided at any position.

  In Embodiments 1 and 2 of the present invention, the material of the air filter 3 is a non-woven fabric, but other materials may be used as long as the material can be expanded and contracted in the cylinder center line direction.

  Furthermore, in Embodiment 2 of this invention, although the filter support part 42 has comprised the cone shape, you may comprise the pyramid shape.

  In addition, in Embodiments 1 and 2 of the present invention, the air filter device 1 is used for capturing dust contained in the air discharged from the hopper dryer. It can be used to capture dust contained in air.

  In the first and second embodiments of the present invention, the air filter 3 is expanded and contracted up and down when the dust clinging into the air filter 3 is dropped. However, the present invention is not limited to this. You may make it expand / contract up and down, twisting around.

  The present invention is suitable for an air filter device that removes dust contained in the air.

1 Air filter device 2 Filter case 3 Air filter 4 Operation handle
5 Filter urging tool (filter urging means)
6 First coil spring (spring member)
7 Second coil spring (filter support urging means)
DESCRIPTION OF SYMBOLS 20 Filter accommodation space 21a Air inflow port 22 Side wall 22a Air outflow port 23 Lower wall 23a Dust discharge port 41 Cylindrical grip part 42 Filter support part 44 Cap (opening-closing means)
51 Annular frame 52 Reinforcement frame 53 Cylindrical member 54 Bar

Claims (6)

A filter case having an upper wall in which an air inflow port is formed, a side wall in which an air outflow port is formed, and a lower wall in which a dust discharge port is formed, and a filter housing space formed on the inner side surrounded by these walls; ,
Both ends open, a tubular air filter having elasticity that is detachably connected to the air inlet, the other end opening is detachably connected to the air inlet, and is housed in the filter housing space,
Telescopic operation means for expanding and contracting the air filter in a direction along the cylinder center line;
When capturing dust in the process of passing the air flowing in from the air inlet from the inside of the air filter to the outside and flowing out from the air outlet, the dust outlet is closed while An air filter device comprising: an opening / closing means for opening the dust discharge port when the dust remaining on the filter case is discharged to the outside of the filter case. In the air filter device according to claim 1,
An air filter device characterized in that a filter urging means for constantly expanding and urging the air filter is provided inside the air filter. In the air filter device according to claim 1 or 2,
The expansion / contraction operation means is an operation handle that is gripped by an operator and expands and contracts the air filter, and is inserted into the dust discharge port so as to be vertically movable, and communicates the inside of the air filter and the outside of the filter case. An air filter device comprising: a cylindrical gripping part; and a filter support part that is connected to one end side of the cylindrical gripping part and supports an opening on the other end side of the air filter. In the air filter device according to claim 3,
The air filter device, wherein the filter support portion is constantly urged upward by a filter support portion urging means. In the air filter device according to claim 3 or 4,
The air filter device, wherein the filter support portion has a conical shape that expands sideward as it goes upward. The air filter device according to claim 2 ,
The filter urging means includes a pair of annular frames that support the peripheral edges of the air filter at both ends,
A reinforcing frame extending radially from the center of the annular frame and connected to the annular frame;
A cylindrical member extending along the cylinder center line of the air filter, one end connected to one reinforcing frame, and the other end opened;
A bar extending along the cylinder center line of the air filter, having one end slidably inserted into the cylinder member, and the other end connected to the other reinforcing frame;
An air filter device comprising: a spring member housed inside the cylindrical member and constantly biasing the bar in a direction protruding from the cylindrical member.

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