JP2024032193A - cleaning equipment - Google Patents

Abstract

An object of the present invention is to provide a cleaning device that can effectively remove and clean dust attached to the inner circumferential surface of a frame member to be cleaned. A cleaning device (1) removes dust attached to an inner peripheral surface (F4) of a frame member (F). The frame member includes a top wall (F3), a peripheral wall (F2) which is connected to one end of the top wall and forms an inner peripheral surface together with the top wall, and a main opening (F1) formed at the other end of the peripheral wall. It is equipped with The cleaning device includes a holding part (40) that holds the main opening side of the frame member, a nozzle (30) that sprays air onto the inner circumferential surface of the frame member, and a cleaning device that uses the air blown by the nozzle to remove air from the inner circumferential surface of the frame member. It is equipped with a duct (10) that sucks in distant dust. The holding portion is attached to the upstream end of the duct in the dust collection direction. The nozzle blows air within a space surrounded by the frame member, the holding part, and the duct. [Selection diagram] Figure 3

Description

The present invention relates to a cleaning device that can remove dust attached to the inner peripheral surface of a frame member formed in the shape of a bag or box.

As disclosed in Patent Document 1, in order to remove dust adhering to various types of workpieces, compressed air is sprayed onto the workpieces from a nozzle. In Patent Document 1, a dust collection hood is used to remove dust. In Patent Document 1, compressed air is blown onto a workpiece placed in an opening of a dust collection hood, and air containing blown and floating dust is discharged through an outlet of the dust collection hood.

Further, in Patent Document 2, a workpiece to be cleaned is supported within a case, and air is blown from a plurality of air nozzles within the case to blow away foreign matter attached to the workpiece. In Patent Document 2, a case surrounds the entire outer circumference of a workpiece, and air inside the case is sucked to remove foreign substances.

Utility model registration No. 3134215 Japanese Patent Application Publication No. 2005-40744

By the way, when the workpiece is a frame member formed in the shape of a bag or a box, dust may adhere to the inner peripheral surface of the frame member. In order to remove such dust, it is conceivable to blow compressed air onto the inner circumferential surface of the frame member as in Patent Documents 1 and 2. However, in the suction of air using the dust collection hood or case in Patent Documents 1 and 2, there is a problem in that it becomes difficult to apply sufficient suction force to the inside of the frame member. For this reason, a vortex is generated at the inner corner of the frame member, causing dust to accumulate, and blown dust to re-adhere to the inner circumferential surface of the frame member, resulting in cleaning of the inner circumferential surface of the frame member. The problem is that it becomes insufficient.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cleaning device that can effectively remove and clean dust attached to the inner circumferential surface of a frame member to be cleaned. shall be.

In one aspect of the present invention, there is a cleaning device for removing dust attached to an inner circumferential surface of a frame member to be cleaned, wherein the frame member has a top wall, and one end of the top wall is a holding portion that holds the opening side of the frame member, the holding portion having a peripheral wall that is continuous with the top wall and forms the inner circumferential surface together with the top wall; and an opening formed on the other end side of the peripheral wall; comprising a nozzle that blows air to the inner circumferential surface, and a duct that sucks dust separated from the inner circumferential surface by the air blown by the nozzle, and the holding part is attached to an upstream end of the duct in the dust collection direction, The nozzle is characterized in that it blows air into a space surrounded by the frame member, the holding portion, and the duct.

According to the present invention, air can be blown onto the inner peripheral surface of the frame member in an enclosed space including the frame member while holding the frame member on the upstream side of the duct in the dust collection direction. This makes it easier for the suction force of the duct to act on the air containing dust separated from the inner circumferential surface of the frame member, and the duct sucks the dust almost simultaneously when it leaves the inner circumferential surface. . As a result, a vortex is generated at the inner corner of the frame member, which prevents dust from accumulating and allows it to flow downstream in the dust collection direction.Furthermore, the blown dust is returned to the inner peripheral surface of the frame member. Adhesion can be avoided, and the inner circumferential surface of the frame member can be cleaned well.

FIG. 1 is a schematic front view of a cleaning device according to a first embodiment. FIG. 1 is a schematic plan view of a cleaning device according to a first embodiment. FIG. 2 is a front cross-sectional view of a partial configuration of FIG. 1; FIG. 4 is a cross-sectional view similar to FIG. 3 showing a state immediately after the start of air injection from the nozzle. FIG. 4 is a sectional view similar to FIG. 3 of the cleaning device according to the second embodiment. FIG. 5 is a sectional view similar to FIG. 4 of the cleaning device according to the second embodiment.

Hereinafter, a cleaning device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments described below, and can be implemented with appropriate modifications within the scope of the gist thereof. In the following figures, some configurations may be omitted for convenience of explanation.

Here, the following description will be based on the X direction, Y direction, and Z direction indicated by arrows in each figure. In the following embodiments, the X direction and Y direction are parallel to the horizontal direction, and the Z direction is parallel to the vertical direction, but these directions may be changed as long as the same functions as in the embodiments can be achieved. Good too.

[First embodiment]
FIG. 1 is a schematic front view of a cleaning device according to a first embodiment. FIG. 2 is a schematic plan view of the cleaning device according to the first embodiment. As shown in FIGS. 1 and 2, the cleaning device 1 is a device that cleans a frame member F as an object to be cleaned. In this embodiment, the frame member F is a component of an electromagnetic switch, and electrodes and the like, which are not shown in the product, are attached to the frame member F.

FIG. 3 is a front cross-sectional view of a part of the structure shown in FIG. 1. As shown in FIG. 3, the frame member F is formed into a box-like or bag-like shape with the lower side (-Z side) open as a main opening (opening) F1. More specifically, the frame member F is connected to a generally rectangular cylindrical peripheral wall F2 extending along the Z direction on both sides of the X direction and the Y direction so as to close one end side of the peripheral wall F2, which is the +Z side. The main opening F1 is formed on the −Z side, which is the other end side of the peripheral wall F2. Inner peripheral surfaces F4 of the peripheral wall F2 and the top wall F3 are exposed through the main opening F1. A plurality of sub-openings F5 for mounting the above-mentioned electrodes are formed in the top wall F3 (see FIG. 2).

The cleaning device 1 includes a duct 10 whose axial center is oriented in the Z direction, a nozzle 30 (see FIG. 3) provided at the axial center position of the duct 10, and a nozzle 30 provided at the upper end side (+Z side) of the duct 10. A holding portion 40 (see FIGS. 2 and 3) that holds the main opening F1 side of the frame member F is provided.

The duct 10 includes a first forming body 11 located on the +Z side and a second forming body 12 located on the -Z side. The duct 10 is connected to a negative pressure source (not shown) at the −Z side end of the second forming body 12 via a suction path (not shown) made of a hose, piping, or the like. Therefore, air flows in the -Z direction inside the duct 10, and dust contained in the air also flows in the -Z direction and is sucked in. Therefore, in this embodiment, the dust collection direction by the duct 10 is the Z direction, the upstream side in the dust collection direction is the +Z side, and the downstream side in the dust collection direction is the -Z side.

An air supply pipe 13 connected to a nozzle 30 is provided at the axial center of the duct 10. The air supply pipe 13 is connected to a supply path (not shown) such as a hose or piping, and is supplied with air compressed to a predetermined pressure from a supply source (not shown).

The first forming body 11 includes a cylindrical inner tube part 15 whose -Z side is inserted into the second forming body 12, and a funnel-shaped inner tube part 15 which is connected to the +Z side of the inner tube part 15 and expands in diameter in the +Z direction. part 16, and a mounting cylinder part 17 that is continuous with the +Z side of the funnel-shaped part 16 and receives the holding part 40 inside.

The second forming body 12 is formed into a cylindrical shape, and while maintaining airtightness with the inner cylinder part 15 of the first forming body 11 to be inserted, the inner cylinder part 15 and the second forming body 12 move in the Z direction. It is provided so that it can be moved relatively.

The duct 10 is provided with a movement assisting mechanism 20 that guides the relative movement along the Z direction (the direction in which the axial center of the duct 10 extends). The movement assisting mechanism 20 includes a first flange portion 21 formed on the first formed body 11, a second flange portion 22 formed on the second formed body 12, a plurality of shaft members 24, and a compression coil spring 25. We are prepared.

The first flange portion 21 is formed to protrude outward from the boundary between the inner cylinder portion 15 and the funnel-shaped portion 16. The second flange portion 22 is formed in the second forming body 12 so as to protrude outward similarly to the first flange portion 21 . The shaft member 24 is provided extending in the Z direction so as to bridge the first flange portion 21 and the second flange portion 22 . Although two shaft members 24 are shown in FIGS. 1 and 3, a plurality of shaft members 24 are provided around the central axis of the duct 10 at predetermined angles (for example, 90 degrees).

The +Z side end of each shaft member 24 is fixed to the first flange portion 21 . The -Z side of each shaft member 24 is inserted into a guide hole 22a formed in the second flange portion 22, and the shaft member 24 is provided slidably in the Z direction within the guide hole 22a. Each shaft member 24 is inserted into a compression coil spring 25, and the compression coil spring 25 is disposed between the first flange portion 21 and the second flange portion 22.

The weight of the first formed body 11 etc. is supported via the compression coil spring 25, and movement of the first formed body 11 etc. in the −Z direction is restricted. On the other hand, by applying a force in the −Z direction to the first formed body 11 by a moving mechanism such as a cylinder or a robot, the compression coil spring 25 is compressed so that the length in the Z direction is shortened, and the first formed body 11 is moved in the -Z direction. With this movement, the shaft member 24 slides within the guide hole 22a and is guided in a direction parallel to the Z direction.

A support cylinder 15a through which the air supply pipe 13 passes is provided in the middle part in the Z direction inside the inner cylinder part 15, and the support cylinder 15a is supported inside the inner cylinder part 15 via a plurality of support plates 15b. ing. Further, a support tube 12a through which the air supply pipe 13 passes is also provided on the -Z side inside the second formation body 12, and the support tube 12a is connected to the inside of the second formation body 12 through a plurality of support plates 12b. is supported by In the support cylinder 15a of the inner cylinder part 15, an air supply pipe 13 penetrating the inside thereof is provided to be slidable in the Z direction. The air supply pipe 13 is fixedly provided to the support tube 12a of the second forming body 12.

Each support plate 12b, 15b is provided at a predetermined angle (for example, 90°) around the central axis of the duct 10. Therefore, in FIG. 3, it appears that the second formed body 12 and the inner cylinder part 15 are partitioned by the support plates 12b and 15b, but the spaces on both sides of the support plates 12b and 15b in the Z direction communicate with each other, and air flows smoothly. It is designed to flow.

The nozzle 30 is provided to spray air onto the inner peripheral surface F4 of the frame member F. The nozzle 30 is supported at the upper end of the air supply pipe 13 via a rotation support part 31, and is rotatably provided around the axial center of the duct 10 by the rotation support part 31. The rotation support portion 31 is provided near the +Z side of the support tube 15a.

The nozzle 30 includes a nozzle pipe 32 that extends from the rotation support part 31 to the +Z side, and a jet hole forming part 34 that is provided on the +Z side of the nozzle pipe 32 and forms a jet hole 33. The nozzle 30 is provided so that air supplied from the air supply pipe 13 can be ejected from the ejection hole 33 through the nozzle pipe 32 .

In addition to the jet holes 33, the jet hole forming portion 34 has a rotation jet hole 35 formed therein, and by jetting air from the rotation jet hole 35 in a direction perpendicular to the Z direction, the air is rotated around the Z axis of the nozzle 30. Obtains driving force in the direction of rotation.

In the ejection hole forming portion 34, a plurality of ejection holes 33 are provided at predetermined angle intervals (for example, 120°) around the central axis of the duct 10. Further, each of the ejection holes 33 is provided so that the ejected air is directed diagonally upward in FIG. 3 and diffused in a fan shape. Furthermore, the air ejected from each ejection hole 33 is set so as not to overlap with the air ejected from other ejection holes 33. As a result, the nozzle 30 rotates while air is being ejected, so that the air blowing state and the air blowing stop state are alternately repeated on the inner circumferential surface F4 of the frame member F.

The holding portion 40 is provided in the shape of a base that holds the main opening F1 side of the frame member F. The holding part 40 is mounted on the mounting cylinder part 17 of the first forming body 11 which is the upstream end of the duct 10 in the dust collection direction. A predetermined airtightness is maintained between the inner circumference of the mounting cylinder part 17 and the outer circumference of the holding part 40.

As shown in FIG. 2, the holding part 40 includes a holding opening 41 formed by a through hole corresponding to the shape of the main opening F1 side of the frame member F. In other words, the main opening F1 side of the frame member F is fitted into the holding opening 41 and held. The holding part 40 is held in a closed state with the forming surface of the frame member F on the main opening F1 side by the holding opening 41, and a predetermined airtightness is maintained between them.

With the holding part 40 attached to the mounting cylinder part 17, the nozzle 30 is arranged in a space surrounded by the holding part 40, the frame member F, and the first forming body 11 (duct 10). Within this space, the nozzle 30 can blow air toward the inner circumferential surface F4 of the frame member F.

Next, a method of cleaning the inner circumferential surface F4 of the frame member F using the cleaning device 1 according to the present embodiment will be described with reference to FIGS. 3 and 4. FIG. 4 is a cross-sectional view similar to FIG. 3, showing a state immediately after the start of air injection from the nozzle.

First, as a preparatory work, as shown in FIG. 3, the main opening F1 side of the frame member F is fitted into the holding opening 41 of the holding part 40 and held. In this state, the mounting cylinder portion 17, which is the upstream end of the duct 10 in the dust collection direction, is closed, and external air can be sucked into the duct 10 approximately only through the sub-opening F5 of the frame member F.

After such preparation is completed, the first forming body 11 of the duct 10 is pushed in against the elastic force of the compression coil spring 25 and moved in the -Z direction. At the same time as this movement or at a timing slightly delayed, supply of air to the nozzle 30 and intake of air through the duct 10 are started.

As shown in FIG. 4, as the first forming body 11 moves, the frame member F moves relative to the nozzle forming portion 34 of the nozzle 30, and the nozzle is inserted into the frame member F through the main opening F1. The forming portion 34 enters the state. In this state, air is ejected from the ejection holes 33, and the air can be blown so as to reach the top wall F3 of the frame member F. Thereby, dust adhering to the inner circumferential surface F4 of the peripheral wall F2 and the top wall F3 of the frame member F can be blown off and kept away from the inner circumferential surface F4. In addition, since the jet hole forming part 34 is rotated by jetting air from the rotation jet hole 35, the air from the jet hole 33 is intermittently blown in each area of the inner circumferential surface F4, and the attached dust is removed. It is possible to better blow the air from the inner circumferential surface F4.

The dust blown off from the inner circumferential surface F4 as described above floats in the space surrounded and closed by the holding part 40, the frame member F, and the duct 10. Air is sucked into this space by the duct 10 through the sub-opening F5 of the frame member F, and the air contains suspended dust and flows through the duct 10 to collect the dust. Thereby, it is possible to suppress the blown dust from floating outside the frame member F.

By moving the first forming body 11 in the +Z direction from the state shown in FIG. 4, the position at which air is blown onto the inner circumferential surface F4 of the frame member F can be gradually displaced in the -Z direction. Due to this displacement, the dust blown off from the inner circumferential surface F4 can be directed in the −Z direction, which also allows the dust to be better sucked into the dust collection direction of the duct 10. Here, in the middle of the movement of the first forming body 11 in the +Z direction, the first forming body 11 may be moved back and forth in the Z direction. Such reciprocating movement can provide an effect of scraping off dust adhering to the inner circumferential surface F4 of the frame member F.

According to the first embodiment, a space surrounded and closed by the holding part 40, the frame member F, and the duct 10 can be formed, and inside this space, the nozzle 30 is connected to the inner circumferential surface F4 of the frame member F. Air can be blown. Moreover, since the frame member F is held by the holding portion 40 on the upstream side of the duct 10 in the dust collection direction, air can be taken into the duct 10 through the sub-opening F5 and the main opening F1 of the frame member F. Dust is separated from the inner circumferential surface F4 of the frame member F by the air blowing, and the air containing the dust is caused to flow inside the duct 10 from the inside of the frame member F in the -Z direction, which is the dust collection direction, by the intake air of the duct 10. become.

Therefore, in the first embodiment, the suction force of the duct 10 is likely to act on the dust-laden air inside the frame member F. This suppresses the generation of vortices at the inner corners of the peripheral wall F2 and top wall F3 of the frame member F due to air blowing from the nozzle 30, and prevents dust from staying even if the vortices occur. be able to. Furthermore, air containing dust can be sucked in by the duct 10 almost at the same time as the dust is removed from the inner circumferential surface F4 of the frame member F by blowing air.

With the above, it is possible to prevent the blown dust from re-adhering to the inner circumferential surface F4 of the frame member F and from insufficient suction of dust by the duct 10. Therefore, dust can be effectively removed and cleaned from the inner circumferential surface F4 of the frame member F. In particular, fine dust with a particle size of about 10 to 50 μm is likely to scatter and cause dust convection and re-adhesion, but even such fine dust can have a good cleaning effect. .

Further, by rotating the nozzle 30 or moving relatively in the Z direction, air can be evenly sprayed onto the inner circumferential surface F4 of the frame member F. Furthermore, intermittent blowing of air can also contribute to suppressing convection and re-adhesion of dust, and can effectively remove dust. Moreover, since the nozzle 30 rotates at the same time as the air is blown, the air flow inside the frame member F and the duct 10 can be made into a swirling flow, thereby increasing the dust collection effect.

[Second embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6. In the following description, the same reference numerals may be used for the same or equivalent components as in the first embodiment, and the description may be omitted or simplified.

FIG. 5 is a sectional view similar to FIG. 3 of the cleaning device according to the second embodiment. FIG. 6 is a sectional view similar to FIG. 4 of the cleaning device according to the second embodiment. As shown in FIGS. 5 and 6, in the second embodiment, the configuration of the frame member F is changed from the first embodiment, and the configuration of the holding part 40 is changed in accordance with the change. There is.

In the second embodiment, the frame member F is configured in a bag-like or box-like shape in which the peripheral wall F2 and the top wall F3 form a closed state with no openings or gaps in the area excluding the main opening F1.

Furthermore, in the second embodiment, a flow path 43 is formed in the holding opening 41 of the holding portion 40 . The flow path 43 is formed between the forming surface of the frame member F on the main opening F1 side so as to form a part of the holding opening 41. Therefore, the space between the holding opening 41 and the frame member F becomes unobstructed due to the flow path 43, and the air sucked into the duct 10 flows from the outside to the inside of the duct 10 through the flow path 43.

Accordingly, in the second embodiment as well, as in the first embodiment, dust separated from the inner circumferential surface F4 of the frame member F can be sucked into the duct 10 and cleaned by blowing air. .

The formation position of the flow path 43 in the holding opening 41 is not particularly limited, but if the main opening F1 of the frame member F is rectangular when viewed from the Z direction, it may be formed at each corner of the rectangle. can be exemplified. Another example is a configuration in which a plurality of channels 43 are formed at predetermined intervals in the circumferential direction of the main opening F1. By forming the flow path 43 in this way, air can be evenly sucked in from the position surrounding the main opening F1 on the upstream side of the duct 10 in the dust collection direction, and by extension, the dust contained in the air can also be sucked in.

Note that the present invention is not limited to the above embodiments, and can be implemented with various modifications. In the embodiments described above, the size, shape, direction, etc. illustrated in the accompanying drawings are not limited to these, and can be changed as appropriate within the scope of achieving the effects of the present invention. Other changes may be made as appropriate without departing from the scope of the invention.

In the above embodiment, the duct 10 is configured to be formed by the first forming body 11 and the second forming body 12, but it is not limited to this, and for example, it may be formed by a single cylindrical body. good. In this case, the nozzle 30 is provided inside the duct 10 so as to be moved in the dust collecting direction by an appropriate moving mechanism.

Further, the nozzle 30 may be configured not to rotate around the central axis of the duct 10, but if it rotates, dust on the inner circumferential surface F4 of the frame member F can be better removed.

Further, the illustrated configuration of the frame member F to be cleaned is only an example, and various other shapes may be adopted as long as the frame member F has an inner circumferential surface F4 formed therein.

1: Cleaning device 10: Duct 20: Movement assisting mechanism 30: Nozzle 40: Holding section 43: Flow path F: Frame member F1: Main opening (opening)
F2: Peripheral wall F3: Top wall F4: Inner peripheral surface F5: Sub-opening

Claims (5)

A cleaning device that removes dust attached to the inner peripheral surface of a frame member to be cleaned,
The frame member includes a top wall, a peripheral wall that is connected to one end of the top wall and forms the inner circumferential surface together with the top wall, and an opening formed at the other end of the peripheral wall,
a holding part that holds the opening side of the frame member;
a nozzle that blows air onto the inner peripheral surface;
a duct that sucks in dust separated from the inner circumferential surface by air blown by the nozzle,
The holding part is attached to an upstream end of the duct in the dust collection direction,
The cleaning device is characterized in that the nozzle sprays air within a space surrounded by the frame member, the holding portion, and the duct. A sub-opening is formed in at least one of the top wall and the peripheral wall of the frame member,
The cleaning device according to claim 1, wherein the holding portion holds the frame member in a closed state with respect to the opening side. The frame member is formed in a closed state in a region excluding the opening,
The cleaning device according to claim 1 or 2, wherein the holding portion forms a flow path between the holding portion and the opening side of the frame member, through which air sucked by the duct flows. The cleaning device according to claim 1 or 2, further comprising a movement assisting mechanism that guides relative movement of the nozzle with respect to the frame member along the extending direction of the axial center of the duct. 3. The cleaning device according to claim 1, wherein the nozzle is provided at an axial center position of the duct and is rotatably provided around the axial center.

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