JPH03143516A - Bag filter device for working vacuum system - Google Patents

Abstract

PURPOSE:To facilitate the exchange of filter bags and discharge of refuse by providing an opening/closing lid having a suction-side opening and its detaining means at the upper opening of a case having a sucked-side opening, furnishing a bottom lid and providing a filter bag in the case. CONSTITUTION:A sucked-side opening 20a is provided at a position shifted from the center of the case 20 having a cylinder 29 with the bottom opened to the inside. The upper opening of the case 20 is opened or closed by an opening/closing lid 23 provided with a suction-side opening 23a. The lid 23 is kept closed by the detaining means 25, and a non-falling filter bag 31 for removing refuse is fixed between the lid 23 and the case 20. In addition, a basket 33 having a grid 33c for holding the shape of the bag 31 is placed in the bag 31. Furthermore, an inspection window 26a is provided at a specified position of the case 20, and the bottom opening of the case 20 is opened or closed by the bottom lid 21. Consequently the bags 31 are easily exchanged, and the refuse is readily discharged.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a bag filter device for a processing vacuum system that is used in a vacuum system for fixing a workpiece and collects dust.

[Conventional technology]

FIG. 7 shows a woodworking processing device 1 as an example in which a bag filter device is used. Reference numeral 2 denotes a cutting head, which is provided so as to be movable in the horizontal direction along a guide rail 3. Reference numeral 4 denotes a cutting blade provided on the cutting head 2, which performs a predetermined movement operation by numerical control; 5 is a table; 6 is a jig plate placed on the table 5; 7 is a jig plate 6
This is a workpiece such as a plate placed on top. A large number of suction holes (not shown) are provided on the top surface of the table 5, and
A hollow portion is formed inside the table 5 and communicates with the suction hole. In addition, a large number of suction holes (not shown) are arranged in the jig plate 6 according to the shape of the workpiece 7. 8 is a suction pipe that communicates with the hollow part of the table 5 and has one end connected to it; 9 is a bag filter device to which the other end of the suction pipe 8 is connected; 10 is a suction pump; 11 is a suction pump 1
This is a suction pipe that connects the bag filter unit W9 and the bag filter unit W9. Next, the operation will be explained. First, the jig plate 6 is placed on the table 5 and positioned, and then the workpiece 7 is placed on the jig plate 6 and positioned. Next, when the suction pump 10 is operated, the suction pipe 8. Bag filter device 9 and suction pipe 11
Through this, the air in the hollow part of the table 5 is suctioned, whereby the workpiece 7 is suctioned and fixed at a predetermined position on the table 5 together with the jig plate 6 through the suction hole of the jig plate 6 and the suction hole of the table 5. Ru. At this time, the sucked wood chips, dust, and other garbage are captured by the bag filter device 9. The conventional air filter device 9 used in the above-mentioned wood processing device 1 generally stores a filter bag in the housing,
It is configured to send air sucked in from the suction pipe 8 to the suction pipe 11 side through a filter bag.

[Problem to be solved by the invention]

The bag filter device 9 used in the conventional wood processing device 1 requires the troublesome work of inserting your hand into the housing and loosening the set screws when replacing the filter bag.
Further, there were other problems, such as the fact that it took time and effort to remove the dust that had accumulated inside the housing. This invention was made in order to solve the above-mentioned problems, and its purpose is to provide a bag filter device for a processing vacuum system that allows easy replacement of filter bags and discharge of dust. There is.

[Means to solve the problem]

The bag filter device according to the present invention includes an opening/closing lid having a suction side opening and a locking means for the opening/closing lid on the upper part of a case having an opening on the suction side, and a bottom lid that can be opened and closed, and an internal A filter bag that communicates with the suction side opening is housed in a case, and a cage-like body is further provided inside the filter bag.

[For use]

By operating the above-mentioned locking means, the filter bag can be easily attached and detached, and by opening the bottom cover, the dust accumulated in the case can be easily discharged. The basket-like body prevents the filter bag from being distorted by suction, allowing efficient dust collection and exhaust.

【Example】

A first embodiment of the present invention will be described below with reference to the drawings. 1 and 2, the case 20 has a cylindrical shape, and the suction side opening 20a to which the suction pipe 8 of FIG. A funnel-shaped portion 20b is formed in the lower part thereof, and a bottom M21 is provided in the bottom opening of the funnel-shaped portion 20b so as to be freely attachable and detachable with a set screw 22. An opening/closing lid 23 is provided at the upper opening of the case 20 so as to be openable and closable, and the opening/closing lid 23 is provided with a suction side opening 23a to which the suction pipe 11 shown in FIG. 6 is connected. Locking means 2 for holding the opening/closing M23 in a closed state
5 are provided at three locations in this embodiment, as shown in FIG. The number of locking means 25 installed is not limited. This locking means 25 has a hook-shaped locking portion 25 at the tip.
a locking member 25b fixed to the opening/closing lid 23, a rotating member 25d provided on the case 20 and provided with a pressing portion 25c, and a rotating member 25d biased by a spring 25e.
It is composed of a shaft member 25g whose negative end is connected to a fulcrum (not shown), and a locking pin 25h provided at the tip of the shaft member 25g and removably locked to the locking portion 25a, By pushing up the pressing portion 25c, the rotating member 25d rotates to engage the locking portion 25b and the locking pin 25h.
The lock is released. A window frame 26 is provided on the side surface of the case 20, and this window frame 2
6 is provided with an inspection window 26a into which a transparent plate made of polycarbonate or the like is fitted. The case 20 is also provided with a mounting plate 2 (FIG. 2) having mounting holes 27 for mounting the case 20 in a desired location. A cylindrical body 29 is coaxially provided in the inner half of the case 20 and forms an air passage 30 with the side wall of the case 20. This cylindrical body 29 has an opening 29 at its bottom.
Opening 29 for air passing through passage 3, which is opened as a
It is formed to flow in from a. A filter bag 31 is housed inside the case 20. This filter bag 31 is made of materials such as canvas, and is formed into a cylindrical container whose bottom is closed with the same material and whose top is open, as shown in the third figure, and a flange portion 31a is provided at the periphery of the top opening. provided, this flange portion 31a
A ring portion 31b is provided at the tip of the ring portion 31b, which is formed by sewing a ring made of an elastic material such as rubber. This ring part 31b is placed on the annular step part 20c formed on the outer peripheral edge of the upper opening of the case 20, and the top thereof is held down by the closed opening/closing lid 23, so that
The three filter bags are fixed. Furthermore, the ring portion 31b prevents the filter bag 31 from falling downward even when the opening/closing member 123 is removed. An air passage 32 is formed between the side of the filter bag 31 and the cylindrical body 29. Further, the internal space of the filter bag 31 is communicated with the suction side opening 23a of the opening/closing lid 23. A cage-shaped body 33 is housed inside the filter bag 31 . As shown in FIG. 4, the cage-like body 33 has a cage-like structure in which eight lattices 33c are provided in parallel in this embodiment between two upper and lower rings 33a and 33b. and is housed in a filter bag 31. Note that the number of grids 33c is not limited. Next, the operation of the above configuration will be explained. The suction pipe 8 shown in FIG. 7 is connected to the suction side opening 20a of the case 20, and the suction side opening 23 of the opening/closing lid 23
Connect the suction vibrator 11 shown in FIG. 6 to a. When the suction pump 10 is operated in this state, the suction side opening 20a
Air containing dirt flows in from the This air moves in the direction of the arrow shown by the solid line and flows out from the suction side opening 23a, but first enters the air passage 30. Here, since the suction side opening 20a is arranged to be opened offset from the center of the case 20, centrifugal force is generated, and the coarse dirt collides with the inner wall of the case 20 due to the centrifugal force and falls as shown by the dotted line. , it slides down the funnel-shaped part 20b and accumulates at the bottom. The air flow further passes through the passage 32 and passes through the filter bag 31 to remove fine dust, and then passes through the suction side opening 23.
It flows out from a. At this time, the debris that hits the filter bag 31 falls and accumulates at the bottom. Further, suction by the suction pump 10 exerts an inward suction force on the filter bag 31, and the filter bag 31 tends to be distorted, but the distortion is prevented by the cage-like body 33 inside. If you use this bag filter device for a long time, Case 2
A large amount of dirt accumulates at the bottom of the filter bag 3.
1 becomes dirty, but the amount of dirt can be observed by looking into the inside of the case 20 through the inspection window 26a. Then, by loosening the set screw 22 and removing the bottom lI21 as necessary, the garbage can be disposed of. Furthermore, when removing dust attached to the filter bag 31 or replacing the filter bag 31, the opening/closing lid 23 is opened by unlocking the opening/closing M23 by pulling up the pressing part 25c of the locking means 25. After that, the filter bag 31 and the cage-like body 33 can be taken out from the case 20. In this case, since the ring portion 31b of the filter bag 31 is only placed on the annular stepped portion 20c of the case 20, the filter bag 31 can be easily taken out by simply lifting the filter bag 31. Also, when attaching the filter bag 31, there is a cage-like body 33 inside.
After inserting the ring part 31b, the ring part 31b is placed on the annular stepped part 20c, and then the opening/closing lid 23 is closed, thereby easily attaching and fixing the ring part 31b. The opening/closing M23 can be made into a closed state by locking the locking portion 25a and the locking pin 25h by approximately one-touch operation. FIG. 5 shows a second embodiment, in which a dust collection case 34 is attached to the bottom of the case 20, and the dust collection case 34 has an opening 34a communicating with the case 20 and a dust collection hose. A connecting port 34b is provided, and a rotating lever 35 is provided inside so as to be rotatable by a support shaft 36. A slope 35a is formed on the lower surface of the rotary lever 35, and a through hole 35b and a recess 35c are provided. In addition, the lid body 37, which is made by stacking the valve member 37a, the backing 37b, and the backing suppressing member 37c, is attached to the opening 34.
This lid body 37 is fixed to a bolt 39 screwed through the center through a washer, and the lower part of this bolt 39 is inserted into the through hole 3.
5b. A through hole 39a is provided in the lower part of this bolt 39 in a direction perpendicular to the axis of the through hole 35b.
A is provided with a pin 40 that passes through the rotating lever 35 and has a diameter slightly smaller than that of the through hole 39a.
is formed and penetrated. A spring 4 is provided in the recess 35c.
1 is housed therein, and urges the lid body 37 upward. As a result, the pulp member 37a and the banking 37
The left tip 37d of b is more inclined upward than the right tip 37e. As a result, the opening 34 in the lid body 37
When closing the opening 34a, the left tip 37d first closes the opening 34.
It comes into contact with the side wall of a and can be closed reliably and smoothly. Further, a screw hole 34c is provided that passes through the case 34, and a screw shaft 43 is screwed into the screw hole 34c. A tapered portion 43a that contacts the slope 35a is provided on the inside of the case 34 of the screw shaft 43, and a handle 43b is provided on the outside. In the state shown in FIG. 5, the opening 34a is closed by the lid 37, and when opening the opening 34a, the handle 43
By turning b in the opposite direction, the screw shaft 43 and its tapered portion 43a move back to the right, so the rotating lever 35 rotates counterclockwise together with the lid 37 due to gravity, thereby opening the opening 34a. The accumulated garbage is case 3.
Fall within 4. This dust is sucked by a dust collection hose (not shown) connected to the connection port 34b and collected in a separately provided dust collection device. In the case of the wood processing apparatus 1 shown in FIG. 7, a dust collection hose from a dust collector is connected to the cutting head 2 in order to remove dust around the cutting head 2. Can be used for both purposes. When closing the opening 34a with the lid body 37, the handle 43
By turning b and screwing the screw shaft 43 to the left in the figure, the opening 34a can be easily closed as shown in FIG. FIG. 6 shows a third embodiment, in which a cylinder 44b is arranged in place of the handle 43b of FIG. 5, and a piston rod 44 that moves in the horizontal direction is provided on this cylinder 44b. A tapered portion 44a is formed at the tip of the piston rod 44. The tapered portion 44a presses the slope 35a of the rotary lever 35 to rotate the rotary lever 35. This piston rod 44 is controlled to interlock the operation of the wood processing device 1, and when the processing operation of the wood processing device 1 is stopped, it is automatically moved to the right and operates the dust collector. By forcing the lid 3 to
7 can be opened to collect dust.

【Effect of the invention】

As described above, according to the present invention, the opening/closing lid having the suction side opening and its locking means are provided in the upper opening of the case having the suction side opening, and the bottom lid is also provided, and the case further includes the above-mentioned opening in the case. A filter bag communicating with the suction side opening is provided, and a cage-like body is provided inside the filter bag, so that
It is possible to easily dispose of the dust accumulated in the case and replace the filter bag, and the filter bag does not become distorted due to suction, and the dust can be removed efficiently with a simple structure. is obtained.

[Brief explanation of the drawing]

1 is a sectional side view showing a bag filter device according to a first embodiment of the present invention, FIG. 2 is a plan view of the same device, and FIG.
The figure is a perspective view of a bag filter, FIG. 4 is a perspective view of a cage-like body used in the device, and FIGS. 5 and 6 are main parts of bag filter devices according to second and fourth embodiments of the present invention. FIG. 7 is a configuration diagram showing a wood processing device using a bag filter device. 20 is the case, 20a is the suction side opening, 21 is the bottom cover,
23 is an opening/closing lid, 23a is a suction side opening, 25 is a locking means, 31 is a filter bag, 33 is a cage-shaped body, and 33c is a grid. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Figure Figure

Claims (3)

[Claims] (1) A case having a cylindrical body with an open bottom inside;
A suction side opening opened at a position offset from the center of the case, an opening/closing lid configured to open and close the upper opening of the case and provided with a suction side opening, and the opening/closing lid set in a closed state. a locking means for holding; a filter bag fixed between the opening/closing lid and the case to prevent it from falling; and a filter bag for removing dust; and a lattice housed inside the filter bag to maintain the shape of the filter bag. 1. A bag filter device for a processing vacuum system, comprising: a basket-like body having: an inspection window provided at a predetermined position of the case; and a bottom cover for opening and closing a bottom opening of the case. (2) The bag filter device for a processing vacuum system according to claim 1, further comprising an opening/closing means for opening and closing the bottom cover using a manual handle. (3) The bag filter device for a processing vacuum system according to claim 1, further comprising an opening/closing means for automatically opening and closing the bottom cover in conjunction with the operation of the wood processing device.