Dust collection system

Abstract

This allows for the installation of a dust collection system below the paint booth while minimizing the burden on the workers. [Solution] The system comprises a filter unit 21, a trolley 22 having an exhaust passage that communicates with the outlet of the filter unit 21 and moves the filter unit 21 on it, a booth-bottom duct 12 that introduces exhaust gas into the filter unit 21, a discharge device 13 connected to an exhaust port which is the end of the exhaust passage and discharges the exhaust gas flowing in from the filter unit 21, and a storage chamber 11 in which the trolley 22 is housed. The storage chamber 11 has a door 11a facing the direction opposite to the discharge device 13, and the trolley 22 has a handle 22b that contacts the door 11a when the door 11a is closed. When the door 11a is closed toward the inside of the storage chamber 11, the trolley 22 is pushed toward the door 11a via the handle 22b, and the exhaust port of the trolley 22 is connected to the discharge device 13.

Description

Technical Field

[0001] The present disclosure relates to a dust collection system.

Background Art

[0002] Generally, the dust collection system of a large painting booth is installed below the painting chamber. In recent years, due to the concepts of energy conservation and space saving, there is a high demand for more compact painting booths, and space saving below the painting chamber is required.

[0003] Patent Document 1 discloses painting equipment that connects a filter unit to the booth floor discharge part to collect paint in the exhaust gas. In this painting equipment, it is described that a filter unit is connected to the booth floor discharge part to collect paint in the exhaust gas. A paper filter is installed in this filter unit, and the filter member has a structure that can ensure airtightness without being weakened.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Generally, in a collection system, in order to increase the dust collection area, it is necessary to increase the size of the dust collection device. Furthermore, in a painting booth adopting a low-floor type, since a conventional dust collection device cannot be arranged directly below the painting work surface, duct construction is required to the dust collection device installed outside the painting booth, or the dust collection device needs to be installed on the side of the painting booth, which may result in a wider cleaning and maintenance range.

[0006] Furthermore, while painting systems are being designed with lower floors to save space, the location where dust collectors are installed is even lower than the lowered floor. This means there is insufficient space to install dust collectors of sufficient size, and even if dust collectors are installed, access and maintenance become extremely difficult, and the poor posture of workers during installation is a problem.

[0007] This disclosure provides a dust collection system that allows a dust collection device to be installed below a paint booth while improving worker access to and maintenance of the dust collector, and reducing the burden on workers. [Means for solving the problem]

[0008] The dust collection system according to this disclosure is disposed below a painting room in which an object is spray painted, and is a dust collection system for collecting unapplied paint mist contained in the exhaust gas of the painting room, comprising: a filter unit for collecting unapplied paint mist; a trolley having an exhaust passage that communicates with the outlet of the filter unit and configured to be movable on which the filter unit is mounted; a booth-bottom duct for introducing the exhaust gas into the filter unit; a discharge device connected to an exhaust port which is the end of the exhaust passage and for discharging the exhaust gas flowing in from the filter unit; and a housing chamber in which the trolley is housed, wherein the housing chamber has a door that separates the housing chamber from the outside of the housing chamber in a direction opposite to the discharge device, the trolley is provided on the opposite side from the discharge device and has a handle that contacts the door when the door is closed, and when the door is closed toward the inside of the housing chamber, the exhaust port provided on the trolley is pushed toward the door via the handle, thereby connecting to the discharge device. This allows the dust collection device to be set in the designated position without the worker having to enter the painting room or the area under the floor of the painting booth. [Effects of the Invention]

[0009] This disclosure provides a dust collection system that allows for the installation of a dust collection device below a paint booth while improving accessibility and maintenance of the dust collector for workers and reducing the burden on workers. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view showing the configuration of the dust collection system. [Figure 2] This is a perspective view showing some of the components connected to the dust collection chamber and the trolley. [Figure 3] This is a perspective view of the filter unit and the trolley. [Figure 4] This is a perspective view showing examples of changes in the handles of a trolley. [Figure 5] This diagram shows a configuration for sealing the space between the trolley and the duct below the booth. [Figure 6] This is a cross-sectional view showing an example configuration in which hinges are not used for sealing between the trolley and the duct under the booth. [Modes for carrying out the invention]

[0011] Embodiment 1 The dust collection system according to this embodiment will now be described with reference to the drawings. Figures 1(a) and 1(b) are perspective views showing an overview of the dust collection system 1. This dust collection system 1 is located below a painting chamber (not shown) where spray painting is performed on an object.

[0012] As shown in Figures 1(a) and 1(b), the dust collection system 1 comprises a storage chamber 11 located below the painting chamber and housing a trolley 22 on which a filter unit 21 is set; a booth-bottom duct 12 located below the painting chamber and above the storage chamber 11, connecting the painting chamber and the storage chamber 11; a discharge device 13 for discharging exhaust gas from the storage chamber 11; and an exhaust duct 14 through which exhaust gas is discharged from the storage chamber 11 via the discharge device 13. Here, the exhaust duct 14 is assumed to be located at the back of the storage chamber 11.

[0013] In the painting room, spray painting is performed on the object to be painted. In the dust collection system 1, uncoated paint mist contained in the exhaust gas from this spray painting is collected.

[0014] The storage chamber 11 has a filter unit 21, a carriage 22 on which the filter unit 21 is placed, a rail 23 on which the wheels 22c of the carriage 22 are placed, and a guide 24. Hereinafter, since dust collection is performed on the gas inserted into the carriage 22 on which the filter unit 21 is placed, this part will be described as a dust collection device. However, regarding other component articles, for example, those including at least one of the storage chamber 11, the booth bottom duct 12, the discharge device 13, and the exhaust duct 14, or all of them may be regarded as a dust collection device.

[0015] Here, the storage chamber 11 is provided with a door 11a that partitions the inside and the outside. This door 11a is a double - leaf door that opens outward. Fig. 1(a) shows the state where the door 11a is closed, and Fig. 1(b) shows the state where the door 11a is open.

[0016] First, the configuration and operation related to dust collection by the filter unit 21 provided on the carriage 22 and the operation of moving the carriage 22 itself will be described. Figs. 2(a) and 2(b) are diagrams showing the state where the filter unit 21 is placed on the carriage 22 and an example of the surrounding component articles.

[0017] Here, as shown in Fig. 2(a), taking the direction in which the carriage 22 moves as the front - rear direction, the direction in which the exhaust duct 14 is arranged as the back side, and the direction in which a handle is provided on the carriage 22 as the front side as will be described later. Also, regarding the left - right direction of the storage chamber 11, it shall be the left - right direction from the perspective of looking from the front side to the back side.

[0018] As shown in Fig. 2(a), the carriage 22 is in the shape of a rectangular parallelepiped box with an open upper surface and having a space for storing the filter unit 21 inside.

[0019] The carriage 22 has a plurality of wheels 22c at the grounding points and is movable in both the forward and rearward directions. In the internal space of the carriage 22, nine filter units 21, each of which is cubic or rectangular parallelepiped, are set in a state where three are aligned in the forward-rearward direction and three are aligned in the left-right direction.

[0020] Here, FIGS. 3(a) to 3(d) are perspective views showing the respective states of the filter unit 21 and the carriage 22.

[0021] The filter unit 21 is a filter for collecting unpainted paint mist. FIG. 3(a) is a view showing an example of the nine filter units 21 set in the carriage 22. The number of the filter units 21 is not limited to nine, and depending on the process, any number such as two or six can be set, and a carriage 22 having a shape corresponding to the number is used. Here, it is assumed that the carriage 22 has wheels provided at four locations: the left rear, the right rear, the left front, and the right front as the grounding points.

[0022] FIG. 3(b) is a view showing an example of the carriage 22 for setting the filter unit 21. Inside the carriage 22, two separators 22e extending from the forward direction to the rearward direction are arranged to set each filter unit 21 at a predetermined position. That is, in the carriage 22, the plurality of filter units 21 can be made to be in an aligned state in the left-right direction by the separators 22e.

[0023] FIG. 3(c) is a view showing the state where the filter unit 21 is set in the carriage 22. When there is a gap between the filter units 21, a cardboard plate is sandwiched or a curing tape is stretched. Thereby, the filter unit 21 is set in the carriage 22 in a state where the gap is filled.

[0024] Figure 3(d) shows the state in which the filter unit 21 is set on the trolley 22 and dust collection is performed. In Figure 3(d), an example of the interior of the trolley 22 is shown, and the arrows indicate an example of the direction of gas flow. Gas is introduced into the filter unit 21 from the paint room above, passing through the booth lower duct 12. In other words, the booth lower duct 12 is the point where exhaust gas is introduced into the filter unit 21.

[0025] In this process, the filter unit 21 collects dust contained in the gas that enters from above and exits downwards. This gas flows into a space 22a located in the lower part of the trolley 22, below the filter unit 21. The gas that has flowed into this space 22a then flows from an exhaust port 22f provided on the rear side of the trolley 22, through the discharge device 13, into the exhaust duct 14.

[0026] In other words, the discharge device 13 is connected to the exhaust port 22f, which is the end of the exhaust passage in the trolley 22, and can discharge the exhaust gas that flows in from the filter unit 21 into the exhaust duct 14.

[0027] Furthermore, from the above, it can be said that the trolley 22 has an exhaust passage that communicates with the outlet of the filter unit 21, and is configured to be movable with the filter unit 21 on it.

[0028] As shown in Figures 2(a) and 2(b), the front side of the trolley 22 is provided with a handle 22b for the worker to grip when moving the trolley 22 forward or backward.

[0029] As shown in Figures 4(a) and 4(b), the handle 22b of the trolley 22 can be reshaped. Specifically, the handle 22b can be extended for use by an operator when pulling the trolley, as shown in Figure 4(a), and folded to make it compact, as shown in Figure 4(b). The method of folding the handle 22b is not limited to a specific method, and any method of folding is acceptable.

[0030] Here, Figure 1(a) shows an example where the door 11a is closed and the trolley 22 with the filter unit 21 set on it is positioned in a fixed location at the back of the storage chamber 11. In this way, dust collection by the filter unit 21 is performed in the storage chamber 11 with the trolley 22 positioned in a fixed location at the back.

[0031] Here, the direction in which door 11a is provided is towards the front. Since the direction in which the discharge device 13 is provided is towards the back, door 11a is provided in a direction opposite to the discharge device 13, and can be said to partition the inside and outside of the containment chamber 11.

[0032] The handle 22b of the trolley 22 can be fixed in an extended position. Therefore, when the door 11a is closed, the door 11a presses the handle 22b in the rearward direction. As a result, force is applied to the trolley 22 in the rearward direction via the handle 22b, and it becomes fixed in its rearward position.

[0033] In other words, the exhaust port 22f provided on the trolley 22 is pushed into the door 11a via the handle 22b when the door 11a is closed toward the inside of the storage compartment 11, thereby connecting it to the discharge device 13. The connection between the exhaust port 22f and the discharge device 13 is edge-sealed. The length of the edge can be arbitrarily changed.

[0034] On the other hand, Figure 1(b) shows an example of a state in which the door 11a of the storage compartment 11 is open and the operation to remove the trolley 22 is being performed, or the operation to set the trolley 22 in a fixed position at the back. In this case, for example, even if the trolley 22 is positioned near the fixed position at the back of the storage compartment 11, the handle 22b extending from the trolley 22 is positioned near the door 11a. Therefore, the worker can easily remove the trolley 22 from the storage compartment 11 by pulling the handle 22b.

[0035] Furthermore, the filter unit 21 can be easily replaced when the trolley 22 is removed from the storage chamber 11. Also, when the trolley 22 is outside the storage chamber 11, it requires a large space when the handle 22b is extended, so the space used can be reduced by folding the handle 22b.

[0036] Returning to Figures 4(a) and 4(b), the wheels 22c of the bogie 22 are positioned on the rails 23. Specifically, the rails 23 consist of a left rail 23a on which the left side of the bogie 22, i.e., the left rear and left front wheels 22c are mounted, and a right rail 23b on which the right side of the bogie 22, i.e., the right rear and right front wheels 22c are mounted. As a result, the two rails 23 can restrict the movement of the wheels 22c of the bogie 22 so that the bogie 22 moves only in the forward and backward directions.

[0037] Next, the configuration and operation related to the sealing between the trolley 22 and the booth lower duct 12 near the upper end of the trolley 22 will be described.

[0038] As shown in Figures 4(a) and 4(b), the upper edge of the trolley 22 is provided with an edge portion 22d that protrudes outward. Specifically, the portion extending from the front to the back on the left side of the trolley 22 is referred to as the left edge portion 31, and the portion extending from the front to the back on the right side of the trolley 22 is referred to as the right edge portion 32. Similarly, the edge on the back side of the trolley is referred to as the back edge portion 33, and the edge on the front side of the trolley 22 is referred to as the front edge portion 34.

[0039] Furthermore, as shown in Figures 2(a) and 2(b), two guides 24 are provided inside the storage chamber 11, slightly above the upper end of the trolley 22. Here, the guide provided above the left edge 31 of the trolley is called the left guide 24a, and the guide provided above the right edge 32 is called 24b.

[0040] As shown in Figure 2(b), a guide 24 is positioned at the lower end of the booth duct 12. At this point, a corrugated cardboard part 41 is placed between the guide 24 and the upper end of the trolley 22 to provide a seal. In the following description, we will assume that a corrugated cardboard part 41 is used as the sealing material, but the sealing material is not limited to a corrugated cardboard part 41 and can be changed as desired. The sealing material may be made of paper thinner than corrugated cardboard, or it may be made of resin. By using corrugated cardboard as the sealing material, the creation of the sealing material becomes easier and manufacturing costs can be reduced.

[0041] Figures 5(a) to 5(c) are cross-sectional views showing the trolley 22 on which the filter unit 21 is mounted, and the guide 24 and the flow plate 25 that supports the guide 24 from above.

[0042] Figure 5(a) is a cross-sectional view of the trolley 22 and the booth under duct 12, etc., from a viewpoint in the front direction. Here, the upper end of the trolley 22 and the lower end of the booth under duct 12 are configured to overlap along the direction of movement of the trolley 22.

[0043] In the dust collection system 1, as shown in Figure 5(a), a corrugated cardboard part 41, which extends from the front to the back, is inserted between the left edge 31 of the trolley 22 and the left guide 24a located above it to create a seal. The same procedure is followed between the right edge 32 and the right guide 24b.

[0044] Here, the left guide 24a and the right guide 24b are supported from the flow plate 25 via the support portion 26 from above and from a position that does not interfere with the movement of the filter unit 21. The support portion 26 is also adjustable in length in the vertical direction.

[0045] As shown in Figure 5(a), the inner position of the left guide 24a is positioned so that it aligns with the inner surface of the left side wall of the bogie 22. Alternatively, the inner position of the left guide 24a may be inside the left side wall of the bogie 22. Similarly, the inner position of the right guide 24b is positioned so that its surface aligns with the inner position of the right side wall of the bogie 22. The inner position of the right guide 24b may be inside the right side wall of the bogie 22.

[0046] Next, we will describe the corrugated cardboard part 41 that is placed on the back edge 33 and the front edge 34 and seals the back and front sides.

[0047] Here, Figure 5(b) is a cross-sectional view of the trolley 22 and its surroundings, taken from a left-hand perspective. As shown in Figure 5(b), the corrugated cardboard part 41 has a tapered mounting section 41a formed on the front and rear upper parts, such that the front and rear sides are higher and the center is lower. Alternatively, the filter unit 21 may have a tapered shape from the outside to the inside, or a structure in which airtightness can be ensured with weights.

[0048] Here, the rear and front sides of the booth-under duct 12 are formed by a movable plate (hereinafter referred to as a hinge) 27. More specifically, the hinge 27 is provided with a first extension portion 27a whose length can be adjusted in the vertical direction, a second extension portion 27b extending horizontally from the upper end of the first extension portion 27a, and a weight 27c provided at the lower end of the first extension portion 27a. As shown in Figure 5(b), in the hinge 27, the weight 27c can swing in the front-rear direction within a predetermined distance range.

[0049] For example, in the hinge 27, the first extending portion 27a can swing around a rotation axis extending in the left-right direction near the connection point between the first extending portion 27a and the second extending portion 27b, that is, near the point where the hinge 27 is bent.

[0050] Furthermore, a long hinge can be used for hinge 27. That is, this long hinge has a shape that extends in the left-right direction and is installed so that it can swing around an axis with the left-right direction as the center of rotation axis.

[0051] Figures 5(c) to 5(e) show examples of the positional relationship between the weight 27c and the mounting section 41a. Figure 5(c) shows the weight 27c positioned so as to flatten the taper on the rear side of the mounting section 41a, Figure 5(d) shows the weight 27c positioned midway between the front and rear sides, and Figure 5(e) shows the weight 27c positioned so as to flatten the taper on the front side of the mounting section 41a.

[0052] As a result, the height of the cardboard part 41 is adjusted according to where these weights 27c come into contact with the mounting portion 41a. That is, the height of the cardboard part 41 placed on the back edge 33 and the front edge 34 is automatically adjusted, and the shape of the cardboard part 41 deforms so that the inside of the mounting portion 41a is sealed.

[0053] Based on the above, when the trolley 22 is housed in the storage chamber 11, the upper end of the opening of the trolley 22 on which the filter unit 21 is mounted and the lower end of the booth lower duct 12 are configured to overlap along the direction of movement of the trolley 22, and the booth lower duct 12 is configured to swing along the direction of movement of the trolley 22. As a result, since the booth lower duct 12 is swingable, interference can be suppressed when moving the trolley 22.

[0054] It is also possible to configure the booth's lower duct 12 without using the hinge 27. Figure 6 shows another method of sealing by increasing the height of the cardboard part 41 without using the hinge 27.

[0055] In this case, the duct length of the booth under duct 12, which is positioned above the trolley 22, is made shorter on the front side than on the back side. The trolley 22 is then pushed in with the cardboard parts 41 on the back, left, and right sides already set in place.

[0056] Here, the rear cardboard part 41b is tapered so that the front is higher and the back is lower. The rear cardboard part 41b is pressed against and fixed to the lower rear end of the booth under duct 12.

[0057] Subsequently, by fitting the front cardboard part 41c onto the front side of the upper part of the trolley 22, the entire circumference of the upper part of the trolley 22 can be sealed.

[0058] As a result, the worker can grasp the handle 22b and move the trolley 22, and move the trolley in and out of the storage room 11.

[0059] The closing of the door 11a fixes the trolley 22 in a fixed position at the back of the storage chamber 11. In other words, the closing of the door 11a connects the trolley 22 to the exhaust device 13 so that the gas inserted from the booth lower duct 12 passes through the filter unit 21 set on the trolley 22 and is discharged from the exhaust device 13 to the exhaust duct 14.

[0060] Here, the worker can position the trolley 22 in place by pushing the extended handle 22b without entering the storage chamber 11. Therefore, the worker does not need to bend down, and deterioration of the worker's posture can be prevented.

[0061] Here, the discharge device 13 and the exhaust port 22f of the trolley 22 are edge-sealed using gaskets. Therefore, in the dust collection system 1, when gas is flowed from the trolley 22 through the discharge device 13 to the exhaust duct 14, it is possible to prevent gas from leaking to the outside.

[0062] Furthermore, since the handle 22b provided on the trolley 22 is foldable, it is possible to save space outside the storage compartment 11.

[0063] Furthermore, since the booth-side duct 12 is located at a sufficient distance from the trolley 22, it does not interfere with the trolley 22.

[0064] In the dust collection system 1, the space between the guide 24 and at least a portion of the upper end of the trolley 22 can be sealed with the cardboard part 41. In addition, including this seal, the entire circumference between the lower end of the booth lower duct 12 and the upper end of the trolley 22 can be sealed with the cardboard part 41 in the dust collection system 1.

[0065] More specifically, the upper end of the trolley 22 in the left-right direction is sealed by the lower end of the booth under duct 12 in the left-right direction, the guide 24, and the cardboard part 41. Also, the upper end of the rear side of the trolley 22 can be sealed by the lower end of the rear side of the booth under duct 12 and the cardboard part 41. The front side is sealed in the same way as the rear side.

[0066] Furthermore, the gas that flows through the dust collection system 1 to the exhaust duct 14 can be returned to the painting room and reused.

[0067] It should be noted that the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention. In other words, the above description has been omitted and simplified as appropriate for the sake of clarity, and those skilled in the art can easily change, add, and modify each element of the embodiments within the scope of the present invention.

[0068] For example, although the above description assumes that one trolley 22 is inserted into the storage compartment 11, the configuration may allow for the insertion of two or more trolleys 22. In this case, the number of doors 11a provided in the storage compartment 11 may be set to correspond to the number of trolleys 22, and the trolleys may be inserted into and removed from each door 11a. Furthermore, the storage compartment 11 may have more doors 11a than the number of trolleys 22 placed inside the storage compartment 11. [Explanation of Symbols]

[0069] 1. Dust collection system 11 Confinement Rooms 11a Door 12 Under-booth duct 13 Ejection device 14 Exhaust duct 21 Filter Unit 22 bogies 22a Space 22b Handle 22c wheels 22d Edge 22e Separator 23 rails 23a Left rail 23b Right-side rail 24 Guide 24a Left Guide 24b Right Guide 25 Flow Plate 26 Support part 27 Movable Plate 27a First extension 27b Second extension 27c Weight 31 Left edge 32 Right edge 33. Inner edge 34 Front edge 41 cardboard parts 41a Mounting section 41b Cardboard parts on the back side 41c Cardboard part on the front side

Claims

1. A dust collection system positioned below a painting chamber where spray painting is performed on an object, for collecting unapplied paint mist contained in the exhaust gas of the painting chamber, A filter unit that collects unapplied paint mist, A trolley having an exhaust passage that communicates with the outlet of the filter unit, and configured to be movable on which the filter unit is mounted, The filter unit includes a duct below the booth through which the exhaust gas is introduced, A discharge device connected to the exhaust port which is the end of the exhaust passage, which discharges the exhaust gas flowing in from the filter unit, The system comprises a storage room in which the trolley is housed, The aforementioned containment room is The storage chamber has a door that separates it from the outside of the storage chamber, in a direction opposite to the discharge device. The aforementioned trolley is, It is located on the opposite side from the aforementioned discharge device and has a handle that contacts the door when the door is closed. When the door is closed toward the inside of the containment chamber, the exhaust port provided on the trolley is pushed toward the door via the handle, thereby connecting to the exhaust device. Dust collection system.

2. The aforementioned handle is configured to be foldable. The dust collection system according to claim 1.

3. The aforementioned trolley is, With the trolley housed in the aforementioned storage chamber, the upper end of the opening on which the filter unit is placed and the lower end of the booth lower duct are configured to overlap along the direction of movement of the trolley. The duct below the booth is pivotable along the direction of movement of the trolley. The dust collection system according to claim 1.

4. The trolley is further provided with a guide positioned above it and extending in a predetermined direction, By sealing the space between the guide and at least a portion of the upper end of the trolley with a sealing material, The lower end of the booth duct and the upper end of the trolley are sealed around their entire circumference. The dust collection system according to claim 1.

5. A single storage compartment is provided with multiple trolleys and doors corresponding to the trolleys. The dust collection system according to claim 1.

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