JP6840800B2 - Dust collection filter unit and dust collector - Google Patents

Description

The present invention relates to a dust collection filter unit and a dust collector that sucks dust generated from a processing machine or the like and purifies the air in the factory. In particular, the present invention is arranged horizontally to purify the air in order to collect the dust. Regarding the dust collection filter unit and the dust collector.

Conventionally, an industrial dust collector that sucks and purifies dust has been widely used to purify the air in a factory. As such a dust collector, there is known a dust collector that can prevent the collected and accumulated dust from re-scattering and can reduce the size while having an appropriate rectifying effect of dust-containing air. (See, for example, Patent Document 1 or 2).

Patent Document 1 describes a planar filter obtained by fold-folding a sheet-shaped filter medium into a tubular shape, a cap and an upper end member for holding an opening portion perpendicular to the fold in a flat plate shape, and a resin inside the planar filter. Disclosed is a cartridge element for a dust collector, comprising a reinforcing member provided with a pipe or a round bar placed horizontally, and having a structure in which the reinforcing member disperses compressed air blown into the inside when the filter is backwashed. There is.

Further, in Patent Document 2, a plurality of rectifying holes are formed, and a rectifying plate provided in the dust collecting chamber so as to block the flow of dust-containing air sucked from the suction port, and filtration under the suction port and the rectifying plate. A dust collector including a filter provided in the dust collecting chamber with the surface facing sideways is disclosed.

Japanese Unexamined Patent Publication No. 2010-162539 Japanese Unexamined Patent Publication No. 2014-104419

However, the cartridge elements for the dust collector described in Patent Document 1 are arranged in a plurality of rows so that the folds of the sheet-shaped filter media are vertically arranged under the ducts installed in a plurality of stages in the dust collector, and are backwashed. At this time, the compressed air is ejected downward from the opening of the upper end member of the filter medium, and is configured to wipe off the dust adhering to the outside of the filter medium. Therefore, when removing the cartridge element, it is necessary to move the upper end member so as to slide the duct, which causes a problem that the mounting structure of the cartridge element becomes complicated.

Further, during the backwashing operation, the compressed air is dispersed by a reinforcing member made of a resin pipe or a round bar which is horizontally laid in the cartridge element, and the compressed air acts in the direction of expanding the filter medium. However, since compressed air is ejected in parallel with the folds of the folds of the filter medium, the action of vibrating the filter medium cannot be obtained, and conversely, the reinforcing member side tends to vibrate or rampage, which is efficient. There is also the problem that dust cannot be removed.

On the other hand, the dust collector described in Patent Document 2 includes a plurality of filter units arranged so that the folds of the sheet filter media are vertically folded, and the compressed air during backwashing is rearward from the opening on the front side. Since it is configured to blow off the dust adhering to the outside of the filter medium, the filter unit can be easily removed by pulling it out as it is. However, if an attempt is made to introduce the reinforcing member described in Patent Document 1 into the dust collector described in Patent Document 2, the structure of the filter unit becomes complicated, and the process of assembling the resin pipe and the round bar becomes difficult. There is a problem that the cost increases as a whole.

The present invention has been made to solve the above-mentioned problems, and provides a dust collecting filter unit and a dust collecting device which can efficiently remove dust during backwashing and have a simple structure and are inexpensive. It is the purpose.

In order to achieve the above object, the first dust collecting filter unit of the present invention has two filter media having a large number of fold-shaped creases formed so as to face each other with a gap of a predetermined width, and is formed on the outer peripheral portion of each filter media. A filter main body provided with a frame body, a resin filter holder provided at one end of the filter main body and having an opening formed along the void in a rectangular plate-shaped portion long in the vertical direction, and the opening. A rod-shaped member provided in the gap along the portion and having an outer dimension smaller than a predetermined width of the gap, and the rod-shaped member extends from the upper and lower ends of the plate-shaped portion, respectively. It is characterized in that it is supported between them and is integrally formed with the filter holder.

According to the first dust collecting filter unit of the present invention, the rod-shaped member can be easily installed without complicating the structure of the dust collecting filter unit, and the dust collecting operation and the dust removing operation (backwashing operation) can be easily performed. It is possible to suppress the vibration and rampage of the rod-shaped member at the time. Further, the filter holder can have a simple structure that can be integrally molded by one molding.

The second dust collecting filter unit of the present invention is characterized in that the rod-shaped member is formed in a stepped manner so as to gradually separate from the filter holder from the end portion of the filter holder toward the center. ..

According to the second dust collecting filter unit of the present invention, the position of the filter medium in contact with the compressed air that collides with the rod-shaped member and is diffused during dust removal can be dispersed, and the range in which the filter medium vibrates can be expanded. Dust removal performance can be improved.

The dust collector of the present invention is a dust collector provided with the above-mentioned dust collection filter unit so that the folds of the filter medium are arranged in the vertical direction, and ejects the compressed air toward the opening. A blow tube having a spout is vertically installed at a position separated from the opening by a predetermined distance.

According to the dust collector of the present invention, the dust collection filter unit is easy to handle, has a simple structure, and can be manufactured at low cost.

According to the present invention, an increase in pressure loss during a dust collecting operation can be suppressed, and dust can be efficiently removed during a dust removing operation (during backwashing), and a simple and inexpensive dust collecting filter unit and a dust collecting operation can be performed. A dust collector can be provided.

It is a perspective view which shows the inside of the dust collector which concerns on embodiment of this invention. It is a side view which shows the inside of the dust collector which concerns on embodiment of this invention. It is a rear view which shows the inside of the dust collector which concerns on embodiment of this invention. (1) is a perspective view of the dust collecting filter unit according to the embodiment of the present invention as viewed diagonally from the upper left side, and (2) is a perspective view of the dust collecting filter unit according to the embodiment of the present invention from the lower side diagonally rearward. It is a perspective view. It is an exploded perspective view of the dust collection filter unit which concerns on embodiment of this invention. It is a front view which shows the filter holder of the dust collection filter unit which concerns on embodiment of this invention. FIG. 6 is a cross-sectional view taken along the line AA of FIG. It is a side view which shows the filter holder of the dust collection filter unit which concerns on embodiment of this invention. It is a bottom view which shows the filter holder of the dust collection filter unit which concerns on embodiment of this invention. (1) is a plan view showing a dust collecting operation of the dust collecting filter unit according to the embodiment of the present invention, and (2) is a plan view showing a dust removing operation of the dust collecting filter unit according to the embodiment of the present invention. 3) is a diagram showing the pressure in the void during the dust removing operation of the dust collecting filter unit according to the embodiment of the present invention. It is a perspective view which shows the modification of the dust collection filter unit which concerns on embodiment of this invention. It is a partially enlarged view which shows the main part of the modification of the dust collection filter unit which concerns on embodiment of this invention. It is a front view which shows another modification of the dust collection filter unit which concerns on embodiment of this invention. FIG. 13 is a cross-sectional view taken along the line BB of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. This embodiment is a preferred specific example of the present invention and may be provided with various technically preferable limitations, but the technical scope of the present invention is the scope of the present invention unless otherwise specified to limit the present invention. It is not limited to these aspects. In the following description, for convenience, the front-back, left-right, and up-down directions are set as shown by the arrows in each figure with reference to the directions indicated by the arrows in FIG.

Hereinafter, the dust collector and the dust collection filter unit according to the embodiment of the present invention will be described with reference to FIGS. 1 to 10. Here, FIG. 1 is a perspective view showing the inside of the dust collector according to the present embodiment, FIG. 2 is a side view showing the inside of the dust collector according to the present embodiment, and FIG. 3 is a side view showing the inside of the dust collector according to the present embodiment. A rear view showing the inside of the dust collector, FIG. 4 (1) is a perspective view of the dust collecting filter unit according to the present embodiment as viewed diagonally from the upper left side, and FIG. 4 (2) is a collection according to the present embodiment. A perspective view of the dust filter unit as viewed diagonally from the lower right side to the rear, FIG. 5 is an exploded perspective view of the dust collection filter unit according to the present embodiment, and FIG. 6 shows a filter holder of the dust collection filter unit according to the present embodiment. A front view, FIG. 7 is a sectional view taken along the line AA of FIG. 6, FIG. 8 is a side view showing a filter holder of the dust collecting filter unit according to the present embodiment, and FIG. 9 is a side view showing the filter holder of the dust collecting filter unit according to the present embodiment. A bottom view showing the filter holder, FIG. 10 (1) is a plan view showing the dust collecting operation of the dust collecting filter unit according to the present embodiment, and FIG. 10 (2) is the reverse of the dust collecting filter unit according to the present embodiment. A plan view showing the washing operation, FIG. 10 (3) is a diagram showing the pressure in the void during the backwashing operation of the dust collecting filter unit according to the embodiment of the present invention.

As shown in FIGS. 1 to 3, the dust collector 1 is a so-called pulse jet type dust collector, and is arranged on a dust collecting main body 2 having a substantially rectangular parallelepiped shape long in the vertical direction and an upper part of the dust collecting main body 2. It is provided with an exhaust portion 3 having a substantially rectangular parallelepiped shape which is flat on the upper and lower sides.

The outer surface of the dust collecting main body 2 is covered with a main body case 10, and the inside of the dust collecting main body 2 is arranged so that the dust collecting chamber 12 and the cleaning chamber 13 are adjacent to each other in the front-rear direction by the partition plate 11. It is partitioned. Specifically, the dust collecting chamber 12 is formed behind the partition plate 11, and the cleaning chamber 13 is formed in front of the partition plate 11. The front surface of the main body case 10 is an opening / closing door 10a attached so as to be openable / closable via a hinge portion (not shown). Note that FIG. 2 omits the illustration of the main body case 10, and FIG. 3 omits the illustration of the rear side wall of the main body case 10.

The partition plate 11 includes a vertical partition plate 15 which is erected on the base portion 14 of the dust collecting main body 2, an inclined partition plate 16 which is inclined upward from the upper end of the vertical partition plate 15, and an inclined partition plate 16. It has a horizontal partition plate 17 (see FIG. 2) to which the upper end of the is connected.

The vertical partition plate 15 is a flat plate-shaped member having the same width in the left-right direction as the dust collecting main body portion 2 (base portion 14) and standing upright from the front side position from the center in the front-rear direction of the base portion 14. In the vertical partition plate 15, four openings 20 for communicating the dust collecting chamber 12 and the cleaning chamber 13 are formed in a grid pattern (2 rows and 2 columns) (see FIG. 1). Each opening 20 is formed in a rectangular shape that is long in the vertical direction.

Further, on the front side of each opening 20, a flat plate-shaped pressing plate 21 is rotatably attached forward around a pair of upper and lower hinge portions 22 provided at either the left or right end. Further, at the end of each holding plate 21 opposite to the hinge portion 22, the locked portion is locked to a lock portion (not shown) provided on either the left or right side edge portion of each opening 20. A part (not shown) is provided. That is, the holding plates 21 arranged side by side have hinge portions 22 on the sides close to the left and right side portions of the dust collecting main body portion, and have a so-called double door structure. Further, a slit opening 23 elongated in the vertical direction is formed in the central portion of each holding plate 21 (see FIG. 1).

The inclined partition plate 16 is a flat plate-shaped member having the same left-right width as the vertical partition plate 15. The inclined partition plate 16 has its lower end connected to the upper end of the vertical partition plate 15 and extends rearward at an inclination of about 45 degrees upward. An inspection door 24 for performing maintenance (cleaning, etc.) in the dust collecting chamber 12 is detachably attached to the inclined partition plate 16.

The horizontal partition plate 17 is a flat plate-shaped member having the same width as the vertical partition plate 15. The horizontal partition plate 17 is provided substantially horizontally at the upper end of the main body case 10 so as to form the top surface of the dust collecting chamber 12. To be precise, the horizontal partition plate 17 is attached to the inner peripheral surface of the lower end portion of the exhaust case 64 that covers the exhaust portion 3. The upper end of the inclined partition plate 16 described above is connected to the lateral partition plate 17 slightly behind the center in the front-rear direction. Further, the horizontal partition plate 17 is formed with a circular blower opening (not shown) on the front side of the connecting portion with the inclined partition plate 16.

The dust collecting chamber 12 is a space having a substantially rectangular parallelepiped shape that is long in the vertical direction and is surrounded by a partition plate 11 and a main body case 10 behind the inside of the dust collecting main body 2. In the dust collection chamber 12, a suction port 30 provided behind the upper part of the dust collection main body 2, four dust collection filter units 32 arranged below the suction port 30, and each dust collection filter unit 32 are attached. A support frame 33 for the purpose and a bucket 34 arranged in the lower part of the dust collecting main body 2 are provided. Then, the four dust collecting filter units 32 are inserted into the openings 20 of 2 rows and 2 columns formed in the vertical partition plate 15, supported by the support frame 33, and arranged in a grid pattern (2 rows and 2 columns). To.

The suction port 30 is configured such that a circular suction opening 36 is formed through the center of a substantially square flat plate-shaped opening frame (not shown) attached so as to be suspended downward from the left end portion of the horizontal partition plate 17. ing. A straightening vane 35 (the shape of the straightening vane is not shown) is detachably attached to the suction port 30. A duct 37 is connected to the suction opening 36, and the dust-containing air generated outside the dust collector 1 passes through the duct 37 and is sucked into the dust collection chamber 12 through the suction port 30.

As shown in FIGS. 4 and 5, the dust collecting filter unit 32 includes a resin frame 44 having a substantially rectangular parallelepiped shape that is long in the front-rear direction and flat in the left-right direction, and a pair of left and right filter media attached to the frame body 44. It is configured to include a filter main body 40 composed of 45a and 45b, and a resin filter holder 41 joined to the front end of the filter main body 40.

Each of the filter media 45a and 45b is formed in a pleated shape in which fold-shaped folds extend in the vertical direction by continuously repeating mountain folds and valley folds in the front-rear direction of a material such as a rectangular non-woven fabric in a side view. .. The filter media 45a and 45b are supported by the frame body 44 in a state of being opposed to each other in an upright posture through a gap S (see FIG. 10) having a predetermined width (for example, 40 mm).

The filter main body 40 is composed of symmetrically shaped filter insert members 40a and 40b which are divided into two left and right. Each of the filter insert members 40a and 40b is integrally formed by insert-molding one filter medium 45a or 45b and a frame body 44a or 44b divided into two left and right, respectively. At the ends of the frame bodies 44a and 44b of the filter insert members 40a and 40b on opposite sides to each other, abutting portions 42a and 42b are projected in a flange shape over the entire circumference, and the abutting portions 42a are provided. , 42b are butted against each other and joined to form the filter body 40.

A flange portion 39 is formed at the front end portion of the filter body 40 in a rectangular frame shape slightly larger than the projected shape in the front-rear direction of the frame body 44, and an annular packing (illustrated) is formed on the rear end surface (back surface) of the flange portion 39. Not) is adhesively fixed. Further, in the frame of the flange portion 39, the frame bodies 44a and 44b on the front end surface side of the filter media 45a and 45b are located, and the gap S (see FIG. 10) between the filter media 45a and 45b is the flange portion. It is open within the frame of 39. The front end portion of the gap S in the frame of the flange portion 39 forms an opening for discharging clean air after the dust is filtered from the dust-containing air by the filter media 45a and 45b.

As is well shown in FIGS. 6 to 9, the filter holder 41 is an integrally formed resin member manufactured by resin molding, and includes a rectangular plate-shaped portion 46 long in the vertical direction. The plate-shaped portion 46 is formed with an exhaust opening 47 that is elongated in the vertical direction and opened in a slit shape along the gap S having a predetermined width. On the front surface side of the plate-shaped portion 46 of the filter holder 41, handle portions 48a and 48b are formed integrally with the plate-shaped portion 46 on the left and right sides of the exhaust opening 47. The left handle 48a is arranged below and a recess (not shown) is formed from the left, and the right handle 48b is arranged above and the recess 43 is formed from the right.

On the rear surface side of the plate-shaped portion 46 of the filter holder 41, a rod-shaped member 49 is formed integrally with the plate-shaped portion 46 via the upper and lower support portions 50. The upper and lower support portions 50 extend rearward from the upper and lower end portions on the rear surface side of the plate-shaped portion 46, and a rod-shaped member 49 is supported between the upper and lower support portions 50. The rod-shaped member 49 has an elongated linear shape in the vertical direction, has an outer dimension smaller than a predetermined width of the gap S, and is formed so as to be slightly smaller than the projected area in the front-rear direction of the exhaust opening 47. The outer diameter of the rod-shaped member 49 is preferably set to about ½ of the width of the gap S, more preferably in the range of 0.4 to 0.5 of the width of the gap S, and the present implementation is performed. In the embodiment, the outer diameter of the rod-shaped member 49 is set to 17 mm, and the width of the gap S is set to 40 mm.

Further, a regulation frame portion 51 is projected rearward over the entire circumference of the outer peripheral portion on the rear surface side of the plate-shaped portion 46 of the filter holder 41. The regulation frame portion 51 has a shape slightly larger than the projected shape of the front end portion 40a of the filter main body 40 in the front-rear direction, and can be externally fitted to the front end portion of the filter main body 40.

Since the filter holder 41 has the above-described configuration, the plate-shaped portion 46 having the exhaust opening 47 and the rod-shaped member 49 can be easily formed by a mold that opens in the front-rear direction. The handles 48a and 48b are molded by a slide mold that opens to the left and right, but in any case, the filter holder 41 has a simple structure that can be integrally molded by one molding. ing.

When manufacturing the dust collecting filter unit 32 having such a configuration, first, the filter media 45a and 45b are inserted into the insert mold, and then the frame bodies 44a and 44b are molded by injection resin molding to form the filter media 45a and 45b. The filter insert members 40a and 40b are manufactured by insert molding in which the frame bodies 44a and 44b are integrated with each other. As a result, the frame bodies 44a and 44b and the filter media 45a and 45b are integrated by wrapping the upper and lower end faces and the front and rear end faces of the filter media 45a and 45b with the molding resin of the frame bodies 44a and 44b. While the 44a and 44b and the filter media 45a and 45b are firmly integrated, the left and right surfaces of the filter media 45a and 45b are not in contact with the molding resin, so that a wide filtration area can be maintained.

Next, the abutting portions 42a and 42b of the filter insert members 40a and 40b are butted against each other and welded by vibration welding to completely integrate the two filter insert members 40a and 40b, and the filter main body 40 is manufactured. To. The joining method of the filter insert members 40a and 40b is not limited to this, and screwing is performed via rubber packing or the like, the abutting portion 43 is adhered, or the abutting portion 43 is hot plate welded or ultrasonic waves. It may be joined by a welding process.

Next, the filter main body 40 is inserted in the front direction from the rear surface side of the filter holder 41, the regulation frame portion 51 is fitted onto the front end portion of the filter main body 40, and the filter main body 40 and the filter holder 41 are integrated. Specifically, an adhesive is applied to the inner surface of the regulation frame portion 51 of the filter holder 41 and adhered to the front end portion of the filter main body 40. The joining method between the filter body 40 and the filter holder 41 is not limited to this, and screwing may be performed via rubber packing or the like, bonding may be performed via the abutting portion, or the abutting portion may be subjected to vibration welding. It may be joined by hot plate welding or ultrasonic welding.

The procedure for mounting each of the above-mentioned dust collection filter units 32 in the dust collection chamber 12 will be described again with reference to FIGS. 1 to 3. Each dust collecting filter unit 32 is inserted from the front (cleaning chamber 13) to the rear (dust collecting chamber 12) with respect to each opening 20 formed in the vertical partition plate 15. For example, when the dust collecting filter unit 32 is attached to the opening 20 on the upper left side of the vertical partition plate 15, the user opens the holding plate 21 to expose the opening 20. Then, the dust collecting filter unit 32 is inserted into the opening 20 from the rear end portion, and the dust collecting filter unit 32 is pushed from the front to the rear.

Next, the pressing plate 21 provided in the opening 20 is closed, and the locked portion of the pressing plate 21 is locked to the locked portion. As a result, the packing fixed to the rear surface of the flange portion 39 comes into close contact with the front peripheral edge portion (vertical partition plate 15) of the opening 20 so that the dust-containing air on the dust collecting chamber 12 side does not leak to the cleaning chamber 13 side. It has become. In this state, the exhaust opening 47 of the dust collecting filter unit 32 is opened to the cleaning chamber 13 side through the slit opening 23 of the holding plate 21.

According to the above procedure, the dust collecting filter unit 32 is attached to all the openings 20 formed in the vertical partition plate 15. When the four dust collection filter units 32 are installed in the dust collection chamber 12, a plurality of flow paths 53 of dust-containing air are formed in the dust collection chamber 12 in the vertical direction.

Specifically, as shown in FIG. 3, the plurality of flow paths 53 include a pair of upper and lower dust collecting filter units 32 (hereinafter, "left side") attached to the left wall of the main body case 10 and the openings 20 in the upper and lower stages of the left side. A pair of upper and lower dust collecting filter units 32 (hereinafter, referred to as "filter vs. L") are attached to a first flow path 54 formed between the filter pair L and the left filter pair L and the opening 20 of the upper and lower right stages. From the second flow path 55 formed between the right filter pair R and the third flow path 56 formed between the right filter pair R and the right wall of the main body case 10. It is configured. Needless to say, each of the flow paths 54 to 56 is blocked by the vertical partition plate 15 at the front and by the rear side wall of the main body case 10 at the rear.

The left filter medium 45a of each dust collecting filter unit 32 constituting the left filter pair L faces the first flow path 54. That is, the first flow path 54 is formed downward along the filtration 45a surface on the left side of the dust collection filter unit 32.

In the second flow path 55, a filter medium 45b on the right side of each dust collecting filter unit 32 constituting the left side filter pair L and a filter medium 45a on the left side of each dust collecting filter unit 32 forming the right side filter pair R are provided. Facing. That is, the second flow path 55 is formed downward along each filtration surface of the dust collection filter units 32 arranged on the left and right. Since the filter media 45a and 45b face the left and right sides of the second flow path 55, more dust can be collected. Therefore, the width of the second flow path 55 in the left-right direction is formed to be substantially twice the width (size) of the first flow path 54.

The right filter medium 45b of each dust collecting filter unit 32 constituting the right filter vs. R faces the third flow path 56. That is, the third flow path 54 is formed downward along the filtration surface on the right side of the dust collection filter unit 32. The third flow path 56 is formed so as to have substantially the same width in the left-right direction as the first flow path 54. A straightening vane or the like may be provided above each of the flow paths 54, 55, 56 so as to evenly partition the width in the direction orthogonal to the flow direction of the dust-containing air.

The bucket 34 is provided below the base portion 14 of the dust collecting main body portion 2. The bucket 34 is formed in a tray shape with an open upper portion, and has an inclined surface portion 34a whose lower front portion is chamfered in a side view. Above the bucket 34, dust introduction plates 58 inclined so as to narrow downward from the left and right side walls of the main body case 10 and the rear side wall are provided. The lower end of each dust introduction plate 58 faces the upper part of the bucket 34.

An annular packing (not shown) is adhesively fixed to the upper end surface of the bucket 34. A lock mechanism 59 is attached to the inclined surface portion 34a of the bucket 34, and by locking the lock mechanism 59, the packing of the bucket 34 comes into close contact with the lower surface of the base portion 14. Further, by releasing the lock mechanism 59, the bucket 34 and the lower opening / closing door 34b provided in front of the bucket 34 can be pulled out forward.

Next, the cleaning chamber 13 will be described with reference to FIGS. 1 and 2. The cleaning chamber 13 is a space having a substantially rectangular parallelepiped shape that is long in the vertical direction and is surrounded by the partition plate 11, the main body case 10, and the base portion 14 in front of the inside of the dust collecting main body portion 2. The upper portion of the cleaning chamber 13 is formed so as to spread upward in the front-rear direction along the inclined partition plate 16 described above. The horizontal partition plate 17 forming the top surface of the cleaning chamber 13 is formed with the blower opening (not shown). Further, the cleaning chamber 13 is provided with a dust removing device 60 for removing dust adhering to each dust collecting filter unit 32 by a pulse jet (compressed air).

The dust remover 60 includes a header tank 61 for storing compressed air, a pair of left and right blow tubes 62 connected to the header tank 61, and a pair of solenoids for controlling the supply of compressed air to each blow tube 62. It has a valve 63 and.

The header tank 61 is attached to the lower surface of the horizontal partition plate 17 at the front portion of the cleaning chamber 13. The header tank 61 is connected to a compressed air source (not shown) via a pipe (not shown) and stores compressed air supplied from the compressed air source.

Each blow tube 62 faces the exhaust openings 47 of the left filter vs. L and the right filter vs. R at substantially the center of the cleaning chamber 13 in the front-rear direction, and is vertically oriented so as to be parallel to the vertical partition plate 15. It is extended to. Each blow tube 62 is a long tubular body made of metal (which may be made of resin), and the upper end thereof is connected to the header tank 61 via a solenoid valve 63. Further, the lower end portion of each blow tube 62 is closed, and is attached to the attachment portion 62a fixed on the base portion 14. Each blow tube 62 may be attached to the inside of the opening / closing door 10a, and may be configured so that the blow tube 62 and the solenoid valve 63 are connected in a state where the opening / closing door 10a is closed.

Each blow tube 62 is opened with a plurality of injection holes 71 for injecting compressed air supplied from the header tank 61 and whose pressure is adjusted by the solenoid valve 63. Each injection hole 71 is formed at a position facing each exhaust opening 47 of the left side filter pair L and the right side filter pair R.

The exhaust unit 3 has four outer surfaces covered with an exhaust case 64, and controls a blower (specifically, a scroll fan, etc.) 65 that generates suction force for sucking dust-containing air, and a dust collector 1. It has a control device 66 for controlling. Further, behind the upper surface of the exhaust case 64, an exhaust port 67 in which a plurality of elongated small holes are arranged in a staggered manner on the left and right is formed.

The blower 65 is a so-called centrifugal fan device, and has a built-in intake fan 68 that is rotationally driven by a motor 70. The blower 65 is attached with its intake portion facing the cleaning chamber 13 side from the blower opening (not shown) of the horizontal partition plate 17. Further, an exhaust portion is formed from the right side surface to the rear side surface of the blower 65.

The control device 66 is attached to the inside of the front side wall of the exhaust case 64, and exposes the operation panel 69 for direct operation by the user from the front surface of the exhaust case 64. The operation panel 69 is equipped with switches for instructing the operation start / stop and dust removal operation of the dust collector 1, a liquid crystal panel for displaying the operation status, and the like.

Next, the dust collecting operation of the dust collecting device 1 according to the present embodiment will be described with reference to FIGS. 2, 3, 4 (1) and 10 (1). In addition, in FIG. 2, FIG. 3, FIG. 4 (1) and FIG. 10 (1), the flow of dust-containing air and clean air is indicated by a thick arrow.

The user operates the operation panel 69 to instruct the operation of the dust collector 1. According to the instruction from the user, the control device 66 starts the operation of the dust collector 1. Specifically, the control device 66 controls the motor of the blower 65 to rotate and drive the intake fan 68. The rotation of the intake fan 68 generates a suction force from the suction port 30 toward the dust collection chamber 12 and the cleaning chamber 13. As a result, the dust-containing air from the dust generation source is sucked into the dust collection chamber 12 from the suction port 30 through the duct 37.

The flow of dust-containing air flowing into the dust collection chamber 12 from the suction port 30 on the left side is dispersed into a downward flow along the left wall and a straight flow to the right, and further, a rectifying plate (not shown) or the like. By the action of, it is possible to exert a uniform dispersion and rectification action, and it is possible to generate a stable downdraft of dust-containing air in the dust collecting chamber 12.

Since the suction force due to the rotation of the intake fan 68 acts on each flow path 53 via the exhaust opening 47 (void S) of the dust collecting filter unit 32 and the respective filter media 45a and 45b, the rectification of each rectifying plate is performed. The dust-containing air divided into the divided flow paths 54, 55, and 56 by the dispersion action becomes a downdraft and flows below the dust collecting chamber 12. Specifically, the dust-containing air that has flowed into the first flow path 54 flows downward, is sucked into each of the filter media 45b (filter surface) on the left side of the left filter L, and passes through the filter media 45b in a large number. Dust is collected at the folds.

As shown in FIG. 10 (1), the clean air from which the dust has been removed from the dust-containing air flows into the voids S of the left filter vs. L and passes between the filter media 45a and 45b and the rod-shaped member 49. , It is exhausted to the cleaning chamber 12 from each exhaust opening 47 in front.

The dust collection operation is also performed in the other flow paths 55 and 56, and the dust collected in the filter media 45a and 45b of each dust collection filter unit 32 is partially due to the downdraft and most of the dust is described later. It is wiped off by the dust removal operation, falls, and is deposited in the bucket 34.

The clean air exhausted from the exhaust openings 47 of the left side filter to L and the right side filter to R to the cleaning chamber 12 becomes an updraft due to the suction force due to the rotation of the intake fan 68. The clean air is sucked into the blower 65 from the intake portion and exhausted from the exhaust portion, further rises in the exhaust case 64, and is exhausted to the outside of the dust collector 1 from the exhaust port 67.

Next, the dust removing operation (backwashing operation) of each dust collecting filter unit 32 by the dust removing device 60 will be described with reference to FIGS. 1 to 3 and 10 (2). In FIG. 10 (2), the flow of compressed air is indicated by a broken line arrow.

This dust removal operation is executed, for example, when it is detected by a sensor or the like that the amount of clean air exhausted from the exhaust port 67 is less than a predetermined value, or during maintenance performed at regular intervals. The dust removal operation may be executed at a desired timing based on the user's operation.

First, when the dust removal operation is started, the compressed air supplied from the compressed air source via the pipe is accumulated in the header tank 61. Then, for example, the control device 66 introduces compressed air into each blow tube 62 by controlling the opening and closing of each solenoid valve 63 at regular time intervals, and exhausts compressed air from each injection hole 71 at regular time intervals. It is injected toward 47 (so-called pulse jet injection). As shown in FIG. 10 (2), this compressed air is diffused by the rod-shaped member 49 in the gap S, and not only generates pressure so as to expand from the inside of the filter media 45a and 45b, but also in the vicinity of the rod-shaped member 49. A pressure is generated to vibrate the folds of the filter media 45a and 45b in the front-rear direction. As a result, when the dust is removed by the compressed air, the dust removal operation can be efficiently performed by both the expansion operation of the filter media 45a and 45b and the vibration of the filter media 45a and 45b in the front-rear direction. .. In the dust collection filter unit of the present invention, fold-shaped folds are formed in the vertical direction, rod-shaped members are also formed in the vertical direction, and compressed air is ejected in a direction orthogonal to the fold-shaped folds during the dust removal operation. Therefore, the fold-shaped portion of the filter medium vibrates in the front-rear direction parallel to the ejection of the compressed air.

The control device 66 opens and closes the two solenoid valves 63 in order, and supplies compressed air to the two blow tubes 62 in order. Therefore, the injection of compressed air is sequentially performed on the left side filter pair L and the right side filter pair R.

The dust thus wiped off falls on the downdraft and accumulates in the bucket 34 through the respective flow paths 54, 55, 56. The dust falling through the flow paths 54 and 56 is appropriately guided into the bucket 34 by the dust introduction plate 58. The user periodically releases the lock mechanism 59, pulls out the bucket 34, and discards the dust accumulated in the bucket 34.

If the distance L2 between the rod-shaped member 49 and the exhaust opening 47 is too short during the dust removal operation described above, the compressed air collides with only a part of the filter media 45a and 45b, so that the filter media 45a and 45b are damaged quickly. It may occur. Further, if the rod-shaped member 49 is too close to the exhaust opening 47, it becomes a barrier that hinders the flow of clean air during the dust collecting operation shown in FIG. 10 (1), and the suction force of the blower 65 does not work efficiently. On the other hand, if the distance L2 is too long, the pressure for expanding the filter media 45a and 45b decreases after the compressed air collides with the rod-shaped member 49 and is dispersed to the left and right. Further, when L2 is set to be long, when the compressed air is ejected, the pressure of the compressed air becomes a negative pressure in the vicinity range L4 of the exhaust opening 47 as shown in the diagram of FIG. 10 (3), and this range L4 becomes negative. become longer. That is, since the suction action is exerted in the range L4 between the exhaust opening 47 and the rod-shaped member 49, the dust adhering to the dust-containing air side (outside) surfaces of the filter media 45a and 45b around this range L4. On the other hand, the dust removal operation does not work at all.

As described above, L2 may not be too short or too long, and in order to maintain the actions during both the dust collecting operation and the dust removing operation in a suitable state, L2 is preferably set to the width of the gap S. As described above, it is preferable to set the depth dimension L1 of the filter main body 40 to 1/2 or less, more preferably the width of the gap S or more and 1/3 or less of L1, or about twice the width of the gap S. By setting L2 in such a range, the energy loss of the compressed air is also reduced, and the bonding state between the filter media 45a and 45b and the frame 44 and the filter body 40 and the filter holder 41 can be maintained satisfactorily. In this embodiment, L2 is set to 82 mm.

Further, when the distance L3 from the blow tube 62 to the exhaust opening 47 is increased, the amount of air introduced into the gap S increases due to the Venturi effect, and the pressure inside the gap S increases. Therefore, when L3 is as long as possible, the amount of air introduced by the injection of the pulse jet per time increases, and if the amount of air introduced per time increases, the flow velocity of the air introduced into the void S increases. It becomes faster and the energy of the air colliding with the rod-shaped member 49 increases. On the other hand, if L3 is made too long, the compressed air generated by the injection of the compressed air may collide with the edge of the exhaust opening 47 and be not efficiently introduced into the gap S, and the assembly error of the blow tube 62 becomes large. There is a risk. Therefore, it is preferable to set L3 to be the same as or less than L2 and longer than the width of the gap S (L2 ≧ L3> S). In this embodiment, L3 is set to 62 mm.

According to the dust collecting filter unit 32 and the dust collecting device 1 according to the above-described embodiment, the traveling direction of the compressed air in the gap S and the fold direction of the folds of the filter media 45a and 45b are parallel to each other during the dust removing operation. At the same time, since the rod-shaped members 49 are arranged parallel to the folds of the filter media 45a and 45b, the compressed air diffused by the rod-shaped members 49 simply generates a pressure to expand the filter media 45a and 45b from the inside. Instead, pressure is generated to vibrate the folds of the filter media 45a and 45b in the vicinity of the rod-shaped member 49 in the front-rear direction. As a result, the performance of removing dust by compressed air can be improved.

Further, according to the dust collector 1 according to the present embodiment, each dust collecting filter unit 32 uses one filter medium because the dust-containing air is filtered by a pair of filter media 45a and 45b arranged to face each other on the left and right sides. Compared with the case, the amount of dust collected per filter medium can be reduced. As a result, the life of each dust collecting filter unit 32 can be extended. Further, each dust collecting filter unit 32 is arranged in an upright posture, and each of the filter media 45a and 45b has a pleated shape along the downdraft (having creases in the vertical direction). Dust can be efficiently collected without obstructing the downdraft in the flow paths 54, 55, 56.

Due to the generation of the downdraft and the weight of the dust itself, the dust collected on the filter media 45a and 45b is likely to be deposited on the lower side of the filter media 45a and 45b. Therefore, it may not be possible to effectively utilize the upper side of each of the filter media 45a and 45b. In that respect, since the dust collecting filter unit 32 of the dust collecting device 1 according to the present embodiment is formed symmetrically in the vertical and horizontal directions, each dust collecting filter unit 32 can be mounted upside down. ing. As a result, the filter media 45a and 45b can be effectively utilized.

Further, in the dust collector according to the present embodiment, a total of four dust collection filter units 32 in 2 rows and 2 columns are attached, but depending on the physical properties of the dust-containing air to be sucked, each dust collection filter unit There may be a difference in the degree of clogging of 32. In this case, the mounting position of each dust collecting filter unit 32 can be changed. That is, the dust collection filter unit 32 can be rotated.

In the dust collector 1 according to the above-described embodiment, a total of four dust collection filter units 32 in 2 rows and 2 columns are arranged in the dust collection chamber 12, but the present invention is not limited to this. For example, a total of six dust collecting filter units 32 in 2 rows and 3 columns may be arranged in the dust collecting chamber 12. That is, a total of 6 openings 20 in 2 rows and 3 columns are formed in the vertical partition plate 15, and the upper and lower openings 20 attached to the upper and lower openings 20 are formed between the left filter pair L and the right filter pair R. A pair of dust collecting filter units 32 (hereinafter, referred to as "intermediate filter pair C") may be arranged so as to be arranged.

The present invention is not limited to the above-described embodiment. For example, as shown in FIGS. 11 and 12, folds of filter media 45a and 45b are formed on the upper and lower surfaces of the frame 81 of the dust collecting filter unit 80. A large number of ventilation grooves 82 may be formed according to the crease shape of the above. In this case, the upper and lower surfaces of the frame body 81 other than the ventilation groove 82 have a shape similar to the shape of the mountain-folded portion 83 of the filter media 45a and 45b and slightly larger than the filter media 45a and 45b, but the ventilation groove. No. 82 is cut to the edge of the valley folds of the filter media 45a and 45b, and gaps are formed at the top and bottom. By forming the ventilation groove 82 in this way, the dust separated from the surfaces of the filter media 45a and 4b is likely to fall below the ventilation groove 82 during the dust removal operation. As a result, the amount of dust removed during one wiping operation can be increased, and the amount of dust accumulated at the corners of the filter media 45a and 45b and the frame 81 can be reduced, so that the wiping performance can be improved. Since the efficiency of the dust removing operation is improved, the time required for the dust removing operation is extremely short as compared with the dust collecting operation, and as a result, the dust collecting performance of the dust collecting device 1 can be improved.

Further, as shown in FIGS. 13 and 14, an opening 87 may be formed in the plate-shaped portion 86 of the filter holder 84 at a position where the handle portions 85a and 85b are projected in the front-rear direction, respectively. As a result, while maintaining the shapes of the handles 85a and 85b, the handles 85a and 85b are integrally molded with the filter holder 84 not by the left and right slide mold shapes but by a simple mold shape that opens in the front-rear direction. be able to. Further, although not particularly shown, the handle portion may be integrally formed at the front end portion of the frame body 44, and an opening through which the handle portion can be inserted may be formed in the filter holder. In this case, the handle portion may be formed in the filter holder. Since it is not necessary to form the filter holder, the structure of the filter holder can be simplified.

Furthermore, the rod-shaped member 49 can realize various irregular shapes, not just a round rod-shaped shape as described above, whereby compressed air can be efficiently acted on. For example, as shown in FIGS. 13 and 14, the rod-shaped member 90 may be formed in a stepped shape so as to gradually separate from the plate-shaped portion 86 of the filter holder 84 from the upper and lower end portions toward the center. As a result, when the compressed air acts, the positions of the filter media 45a and 45b that are in contact with the air that collides with the rod-shaped member 90 and is diffused can be dispersed, and the range in which the filter media 45a and 45b vibrate due to the compressed air can be expanded. , It is possible to improve the dust removal performance during the dust removal operation. Further, since the filter media 45a and 45b can disperse the region damaged by the compressed air, the durability of the filter media 45a and 45b can be improved.

Furthermore, although not particularly shown, when the filter insert members 40a and 40b are butt-joined, there is a possibility that burrs may occur due to vibration welding treatment or ultrasonic welding treatment, or adhesive squeeze out due to adhesive treatment. By dividing the abutting part into upper and lower halves and fitting each abuting part in a convex shape and a concave shape, the filter insert members are held symmetrically with each other, and the burr of the joint part is formed. It is possible to eliminate the need for measures to prevent the removal and adhesive squeeze out.

Further, the present invention can be appropriately modified within the scope of the claims and within a range not contrary to the gist or idea of the invention that can be read from the entire specification, and the dust collector and the filter unit for the dust collector accompanied by such changes can be appropriately modified. Is also included in the technical idea of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be used for a dust collector or the like that sucks dust generated from a processing machine arranged in a factory and purifies the air in the factory.

1 Dust collector 32 Dust collector filter unit 40 Filter body 41 Filter holder 44 Frame body 44a, 44b (divided into two) Frame body 45a, 45b Filter material 47 Opening 49 Rod-shaped member 80 Dust collecting filter unit 81 Frame body 90 Rod-shaped member S void

Claims (3)

A filter body in which two filter media having a large number of fold-shaped folds are opposed to each other with a gap of a predetermined width separated from each other and a frame is provided on the outer peripheral portion of each filter media.
A resin filter holder provided at one end of the filter body and having an opening formed along the gap in a rectangular plate-shaped portion long in the vertical direction.
A rod-shaped member provided in the gap along the opening and having an outer dimension smaller than a predetermined width of the gap, and a rod-shaped member.
The dust collecting filter unit is provided, and the rod-shaped member is supported between the upper and lower support portions extending from the upper and lower ends of the plate-shaped portion, and is integrally formed with the filter holder. The dust collecting filter unit according to claim 1, wherein the rod-shaped member is formed in a stepped shape so as to gradually separate from the filter holder toward the center from the end portion of the filter holder. The dust collecting filter unit according to claim 1 or 2 is a dust collecting device provided so that the folds of the filter medium are arranged in the vertical direction.
A dust collector characterized in that a blow tube for ejecting the compressed air toward the opening is vertically installed at a position separated from the opening by a predetermined distance.

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