JP5283595B2 - Mobile dust collection hood device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable-type dust collecting hood apparatus for preventing diffusion of powder dust in the circumference of a work area. <P>SOLUTION: The movable-type dust collecting hood apparatus 10 is for suctioning powder dust generated in a work area 11 while being connected to a fixed type dust collector and comprises a movable stand 19 which is provided with wheels 14, 15 and wheels 16, 17 running on rails 12, 13 installed right and left in the lower part in the work area 11 and has aperture parts in the front and rear of the lower side and a closed space 18 in the inside; suction hoods 20, 21 installed in an upper part of the closed space 18 and opened in the lower parts; cloth-type front side covers 25, 26, 27 covering the front side aperture part of the movable stand 19 and moved up and down by first elevating means 22, 23, 24; a rear side cover 32 moved up and down by a second elevating means 31 along guide frames 28, 29 installed slantingly forward in a range of 2 to 10 degree in the rear side of the movable stand 19; and a bellows duct 36 for joining a fixed dust collecting duct 35 joined to the suction hoods 20, 21 to the dust collector. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a mobile dust collection hood device that is connected to a fixed dust collector and sucks dust generated at a work place.

2. Description of the Related Art Conventionally, in a workplace where metal pieces are cut and dust is generated, a dust collector that sucks dust is used to prevent the dust from being scattered in the workplace or the atmosphere. At sites where items are taken in and out of the workplace, the dust collector is installed away from the workplace so that the dust collector does not interfere with the work space, and a movable dust collection hood device (dust collector) that sucks in dust. It has been proposed to connect the dust collecting hood device and the dust collector via a duct by arranging the device) near the work place (see, for example, Patent Document 1).

Japanese Patent Publication No.8-026385

However, the dust collection hood apparatus of Patent Document 1 has a large opening on the front side and the rear side in the moving direction, and when sucking the dust, there is a possibility that a lot of dust is scattered outside from the opening portion. The surrounding environment may deteriorate.
In addition, if the area of the opening is large, a large amount of air is sucked, and there is a problem that the fixed dust collector becomes large.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a mobile dust collection hood device that has a small opening and prevents dust from being scattered around the work area.

A mobile dust collection hood device according to the present invention that meets the above-described object is a mobile dust collection hood device that is connected to a fixed dust collector and sucks dust generated from a work place, and is provided on the left and right sides of the work place. A rail and a wheel that respectively travels on the left and right rails are provided at both lower portions, and each has a front opening and a rear opening on the front and rear of the lower side to form a closed space that surrounds the work place inside. A plurality of cloth-like front covers that cover the gantry, a suction hood provided above the closed space and open at the bottom, and a front opening of the movable gantry, each of which can be lifted and lowered independently by a first lifting means And a second elevating means that drives the rear opening of the movable gantry along a guide frame that is inclined forward in the range of 2 to 10 degrees on the rear side of the movable gantry. A rear cover for covering, and the suction frame; Has a fixed dust collecting duct is connected to an exhaust port located at the top of the de, a bellows duct with flexible connecting the fixed dust collecting duct to said dust collector.

In the mobile dust collecting hood apparatus according to the present invention, it is preferable that a plurality of the suction hoods are provided side by side in the left-right direction.

In the movable dust collecting hood apparatus according to the present invention, the wheels disposed at the lower portions on both sides of the movable mount are respectively disposed in front and rear of the movable mount, one of the front or rear disposed is a drive wheel and the other is driven. Preferably it is a wheel.

In the movable dust collecting hood apparatus according to the present invention, the rear cover has a panel-like structure, and the guide frame is formed along the raising / lowering direction of the rear cover, and is provided on both sides of the rear cover. It is preferable to provide a groove into which the guide wheel is inserted.

In the movable dust collecting hood apparatus according to the present invention, the rear cover is connected to one end of a left and right chain that meshes with a sprocket provided on a drive shaft disposed on the upper part of the movable frame. A balance weight is preferably connected to the other ends of the left and right chains.

In the mobile dust collecting hood apparatus according to the present invention, an auxiliary unit is rotatably attached to the laying iron plate at a lower position in front of or behind the cloth-like front cover and seals the lower side of the cloth-like front cover. A seal plate is preferably provided.

In the movable dust collecting hood apparatus according to the present invention, a plurality of the auxiliary seal plates are arranged side by side, and each of them is freely rotated from the 0 degree position to the 90 degree position with respect to the horizontal, and further tilted to 90 degrees with a stopper. It is preferable that the position can be fixed within a range from the position to 120 degrees.

The movable dust collecting hood apparatus according to claim 1 is provided with wheels that respectively run on the left and right rails at both lower portions, and each has a front opening and a rear opening at the front and rear of the lower side. A moving frame that forms a closed space that surrounds the inside, a suction hood that is provided above the closed space and that is open at the bottom, covers the front opening of the moving frame, and is individually lifted and lowered by the first lifting means. The movable gantry is driven up and down by the second elevating means along a plurality of possible cloth-like front covers and a guide frame that is inclined forward in the range of 2 to 10 degrees on the rear side of the movable gantry. A rear cover that covers the rear opening, a fixed dust collection duct that is connected to an exhaust port disposed at the top of the suction hood, and a flexible bellows duct that connects the fixed dust collection duct to the dust collector So collect the dust over the large work area Compared to the case, it enables local dust collection, it is possible to downsize the dust collector.

In particular, since it has a plurality of cloth-like front covers that can be raised and lowered to cover the front opening of the movable frame and a rear cover that is driven up and down to cover the rear opening, the area of the opening can be reduced. As a result, it is possible to efficiently collect dust in the workplace and to prevent dust from scattering to the outside.
More specifically, a closed space formed inside the moving gantry is disposed in the work place, for example, the main body of a cutting device having an arm portion for cutting a metal piece is brought close to the moving gantry, and the arm portion of the cutting device is moved. When cutting a metal piece placed in the work space from the front side of the movable frame and cutting the metal piece placed on the work place, among the plurality of cloth-like front covers, the cloth-like front cover in which the arm part of the cutting device is not arranged directly below and Each of the rear covers can be lowered to the lower limit position to cover most of the front opening and rear opening of the movable platform, and the amount of dust scattered by cutting metal pieces can be reduced. Is possible.

Furthermore, the cloth-like front cover with the arm part of the cutting device disposed below is also lowered, and the upper part of the arm part is covered with the cloth-like front cover, so that the lower parts on both sides of the cloth-like front cover hang down on both sides of the arm part. In this state, the open space on the front side of the movable mount can be minimized.
Further, the back cover is driven up and down along a guide frame that is inclined forward in the range of 2 to 10 degrees, so that the back cover is less in comparison with the vertical movement. Sealing performance can be secured, and furthermore, a load applied to equipment, parts, and the like that raise and lower the rear cover can be reduced.
Moreover, because the fixed dust collection duct is connected to the dust collector by a flexible bellows duct, even if the relative positional relationship between the fixed dust collector and the fixed dust collection duct changes due to the movement of the mobile dust collection hood device, It is possible to prevent the bellows duct from being damaged.

In particular, the mobile dust collecting hood apparatus according to claim 2 is provided with a plurality of suction hoods arranged in the left-right direction, so that dust generated at the work place can be sucked in a shorter distance efficiently and reliably. It is.

The movable dust collecting hood apparatus according to claim 3 is such that one of the wheels arranged before and after the movable frame is a driving wheel and the other is a driven wheel. It is not necessary to provide a control means for synchronizing the rotation speed, and the complexity of the structure can be avoided.

In the movable dust collecting hood apparatus according to claim 4, the inclined guide frame is formed along the ascending / descending direction of the rear cover, and has grooves into which the guide wheels on both sides of the rear cover are inserted. The rear cover can be stably moved up and down along the guide frame without being displaced in a direction perpendicular to the guide frame (that is, without rattling).

In the movable dust collecting hood apparatus according to claim 5, since the balance weight is connected to the rear cover via the left and right chains, the rear cover and the balance weight are balanced by their own weight, and the rear side It is possible to stably hold the cover at a desired height. In addition, it is not necessary to provide a fixing mechanism for fixing the height position of the rear cover to the drive shaft or the like, and the configuration of the mobile dust collecting hood device is complicated, thereby preventing an increase in manufacturing cost.

The mobile dust collecting hood apparatus according to claim 6 is provided with an auxiliary seal plate for sealing the lower side of the cloth-like front cover, so that dust generated at the work site is scattered from the lower side of the cloth-like front cover to the outside. Can be prevented and the sealing performance can be improved.

Furthermore, in the movable dust collecting hood apparatus according to claim 7, the auxiliary seal plate is freely rotated from 0 degree to 90 degrees with respect to the horizontal, and further tilted to be over 90 degrees and 120 degrees with the stopper. Because it is possible to fix in the range of, it is not necessary to attach a special drive device, the auxiliary seal plate can be used easily, and further, when the auxiliary seal plate is divided into a plurality, the weight can be reduced, Each auxiliary seal plate can be opened and closed individually.

1 is a partially omitted front view of a mobile dust collection hood device according to an embodiment of the present invention. It is a side view of the mobile dust collection hood apparatus. It is a partially omitted rear view of the mobile dust collection hood device. It is explanatory drawing when performing an operation | work using the said mobile dust collection hood apparatus. (A)-(C) is explanatory drawing of the guide wheel of the rear cover of the said movement type dust collection hood apparatus, respectively.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 to 3, the mobile dust collection hood device 10 according to one embodiment of the present invention is connected to a fixed dust collector (bag filter) (not shown) and sucks dust generated from the work place 11. The left and right wheels 14, 15 and 15, which are examples of wheels that run on the left and right rails 12 and 13, and the left and right rails 12 and 13, respectively, A rear wheel 17 is provided at the lower part on both sides, and has a front opening and a rear opening at the lower front and rear, respectively, and a movable base 19 having a closed space 18 surrounding the work place 11 inside, and above the closed space 18. The suction hoods 20 and 21 are provided in a truncated pyramid shape and open at the bottom.

Furthermore, the mobile dust collecting hood apparatus 10 covers a front opening of the movable mount 19 and can be moved up and down by first lifting means 22, 23 and 24 each consisting of a chain block (three in this embodiment). Left guide frame 28, which is an example of a guide frame that is inclined forward in the range of 2 to 10 degrees on the rear side of the movable base 19. Along with the right guide frame 29, the second lift means 31 lifts and lowers the rear cover 32 covering the rear opening of the movable gantry 19 and the exhausts disposed at the tops of the suction hoods 20 and 21, respectively. A fixed dust collecting duct 35 connected to the ports 33 and 34 and a flexible bellows duct 36 connecting the fixed dust collecting duct 35 to the dust collector are provided. Hereinafter, these will be described in detail.

Rails 12 and 13 provided on the left and right sides of a work place 11 for performing a gas cutting process or the like of a metal piece are arranged in parallel and have a length of L (for example, 10 to 20) meters. And the movable dust collection hood apparatus 10 can move back and forth along the rails 12 and 13, and the movable length is 0.4 * L-0.6 * L meter.
The left front wheel 14 and the left rear wheel 15 traveling on the rail 12 are respectively arranged in front and rear of the lower left portion of the movable mount 19, and the left rear wheel 15 is rotated by a left wheel drive motor 37 provided on the movable mount 19. The drive wheel is driven. Further, the right front wheel 16 and the right rear wheel 17 traveling on the rail 13 are respectively arranged in front and rear of the lower right portion of the movable gantry 19, and the right rear wheel 17 is connected to a right wheel drive motor 38 provided on the movable gantry 19. The drive wheel is driven by rotation.
Note that the left front wheel 14 and the right front wheel 16 are driven wheels that are rotated by the propulsive force generated in the movable mount 19 by driving the left rear wheel 15 and the right rear wheel 17, respectively.

The movable gantry 19 is arranged in the lower left side and the lower right side in the installation direction of the rails 12 and 13, and a left bottom material 39 to which a left front wheel 14, a left rear wheel 15 and a left wheel drive motor 37 are attached, and a right front wheel. 16, right rear wheel 17 and right bottom material 40 to which right wheel drive motor 38 is attached.
Left vertical members 41 and 42 having lower portions fixed thereto are vertically arranged on the front side and the center of the left bottom member 39, respectively, and right vertical members 43 having lower portions fixed to the front side and the center of the right bottom member 40, respectively. 44 is arranged vertically. The left vertical members 41 and 42 and the right vertical members 43 and 44 are arranged from the upper part to the lower part of the movable gantry 19, and the movable gantry 19 is formed by the left vertical members 41 and 42 and the right vertical members 43 and 44. The posture of front, back, left and right is kept constant.

On the left and right sides of the movable gantry 19, an iron left side wall portion 49 and a right side wall portion 50 are supported and disposed on the left vertical members 41 and 42 and the right vertical members 43 and 44, respectively. The left side wall portion 49 and the right side wall portion 50 sandwich the closed space 18 of the movable mount 19 between them, and block the air flow between the closed space 18 and the outside. It should be noted that a metal plate (not shown) in which the lower part is disposed lower than the left bottom member 39 and the right bottom member 40 inside the lower part of the left side wall part 49 and the right side wall part 50 so as to prevent the leakage of smoke generated in the work place 11. Is fixed.

Further, an iron front wall portion 51 and a rear wall portion 52 are provided in front of and behind the movable mount 19, respectively, and the left side wall portion 49, the right side wall portion 50, the front wall portion 51, and the rear wall portion 52 provide a work space. 11 is formed, the lower side of the front wall 51 is a front opening, and the lower side of the rear wall 52 is a rear opening.
An inspection stairway 53 is provided on the left side wall portion 49 of the movable gantry 19 and can be climbed on an inspection deck (not shown) provided at the upper part of the mobile dust collecting hood device 10 for inspection, repair, etc. Is possible. Further, the movable mount 19 has a frame portion 53 a that supports the inspection stairs 53 and the inspection deck above the closed space 18.

On the lower front and rear sides of the left bottom member 39, left lifting prevention members 45 and 46 for holding the left bottom member 39 in a horizontal direction are provided, respectively. The left lifting prevention members 45 and 46 are arranged so as to have a slight gap from the upper part of the rail 12 in a state where the left bottom material 39 is horizontally arranged, and the movable base 19 is inclined forward and backward, and the left bottom material When one of the front and rear of 39 approaches the rail 12, one of the left lifting prevention members 45, 46 is brought into contact with the upper portion of the rail 12 to prevent the movable mount 19 from being inclined more than a certain angle.
Further, right lifting prevention members 47 and 48 that keep the right bottom material 40 in the horizontal direction are also provided on the lower front and rear sides of the right bottom material 40, respectively, and move in the same manner as the left lifting prevention members 45 and 46. The gantry 19 is prevented from tilting more than a certain angle.

Above the closed space 18, suction hoods 20, 21 are provided in which a lower open portion for sucking dust is disposed at the center of the height of the movable frame 19, and the suction hoods 20, 21 are provided side by side. . The suction hoods 20 and 21 are attached and fixed to the upper part of the left side wall portion 49, the right side wall portion 50, the front wall portion 51 and the rear wall portion 52 of the movable mount 19. Since the exhaust port 33 of the suction hood 20 and the exhaust port 34 of the suction hood 21 are connected to the dust collector via the fixed dust collection duct 35 and the bellows duct 36, the suction hoods 20 and 21 are opened by the operation of the dust collector. Dust in the closed space 18 can be sucked from the lower part. The exhaust ports 33 and 34 can be controlled to be opened and closed, and dust and smoke can be sucked from only one of the suction hoods 20 and 21 depending on the generation state of dust and smoke at the work place 11.
In addition, the bellows duct 36 is flexible, and even if the relative positional relationship between the dust collector and the fixed dust collector duct 35 is changed by the movement of the movable gantry 19, the dust collector and the fixed collector are not damaged. The dust duct 35 can be connected.

On the front side of the moving gantry 19, cloth-like front covers 25, 26, 27 that are made of a heat-resistant material, for example, silica material and cover the front opening of the moving gantry 19 are arranged. The cloth-like front covers 25, 26, and 27 are arranged in close contact with each other in the left-right direction on the front side of the movable frame 19, and the first elevating means 22 arranged immediately above the cloth-like front covers 25, 26, and 27, respectively. , 23 and 24 can be moved up and down independently.
The cloth-like front covers 25, 26, 27 cover the closed space 18 of the movable mount 19 in the state where it is in the lowermost position, and can block the flow of air, and in the state where it is in the uppermost position, the front wall portion 51. And the front lower portion of the movable mount 19 is opened (the front opening is exposed).
The first elevating means 22 (the same applies to the first elevating means 23 and 24) includes, for example, a wire connected to the drive motor and the cloth-like front cover 25 and wound around the rotation shaft of the drive motor. The cloth-like front cover 25 is moved up and down by the rotation of the rotating shaft by the drive motor.

The rear cover 32 has an iron panel-like structure, and the left guide frame 28 and the right guide frame 29 provided respectively on the left and right sides of the rear cover 32 are arranged in the ascending / descending direction of the rear cover 32 (2 to 10 degrees forward). (Inclined direction). As shown in FIGS. 5A, 5 </ b> B, and 5 </ b> C, the left guide frame 28 and the right guide frame 29 are vertical rollers that are examples of guide wheels provided on the sides of the rear cover 32. 32a and a groove 32c into which the lateral roller 32b is fitted to guide the raising and lowering operation of the rear cover 32. In addition, the rear cover 32 is formed by providing vertical and horizontal rollers 32a and 32b that rotate in contact with the bottoms of the grooves 32c of the left guide frame 28 and the right guide frame 29. No. 32 can suppress the frictional force generated between the left guide frame 28 and the right guide frame 29, and can smoothly move up and down.

The second raising / lowering means 31 for raising and lowering the rear cover 32 is rotatably attached to the upper portion of the frame portion 53a of the movable mount 19 by a plurality of bearings 31a, and is connected via a sprocket and a chain to drive for raising and lowering. The drive shaft 55 is driven by the operation of the motor 54, and sprockets 56 and 57 that rotate together with the drive shaft 55 are disposed on the left and right sides of the drive shaft 55, respectively. One end of the left and right chains 59 and 60 meshing with the sprockets 56 and 57 is connected to the rear cover 32, and the lifting drive transmitted to the left and right chains 59 and 60 via the drive shaft 55 and the sprockets 56 and 57 is connected. The rear cover 32 is raised and lowered by the driving force of the motor 54.

The other ends of the left and right chains 59, 60 are connected to balance weights 61, 62, which are fixed in the horizontal position and move in the vertical direction, respectively. The balance weights 61, 62 are balanced with the rear cover 32 by their own weights. Therefore, the rear cover 32 arranged at a desired height can be stably held at the arranged height.
The balance weights 61 and 62 are formed in a rectangular shape in cross section. For example, the balance weights 61 and 62 can be horizontally moved to the inside of the vertically arranged square columnar guide tubes 61a and 62b. A stable movement in the vertical direction can be performed while fixing the position.

A preliminary elevating drive motor 63 for driving the drive shaft 55 is provided on the upper part of the movable gantry 19. When the elevating drive motor 54 cannot be operated due to a malfunction or the like, It is possible to raise and lower the rear cover 32 by operation.
The second lifting / lowering means 31 includes a lifting / lowering drive motor 54, a preliminary lifting / lowering drive motor 63, a drive shaft 55, sprockets 56 and 57, chains 59 and 60, and balance weights 61 and 62. Yes.

Further, since the left guide frame 28 and the right guide frame 29 are arranged to be inclined forward in the range of 2 to 10 degrees, specifically 5.4 degrees, the sprockets 56 and 57, the chains 59 and 60, etc. As a result, it is possible to prevent the rear cover 32 from being distorted. Further, as the inclination angle of the left guide frame 28 and the right guide frame 29 is increased, the vertical length of the rear cover 32 is increased, thereby increasing the time for raising and lowering the rear cover 32. By setting the inclination angles of the left guide frame 28 and the right guide frame 29 to 10 degrees or less, the time required for raising and lowering the rear cover 32 can be set within a range that does not affect the work efficiency.

And since the rear cover 32 is inclined forward, the spatter (spark, molten iron) scattered at the time of cutting the metal piece and adhering to the inner side (front surface) of the rear cover 32 is caused by its own weight. It can be avoided that the rear cover 32 is detached and spatter remains on the rear cover 32. It should be noted that reinforcing ribs are disposed on the outer side (that is, the back surface) of the rear cover 32, and the plate material is entirely exposed on the inner side of the rear cover 32.
The rear cover 32 is formed with a flat surface whose bottom is perpendicular to the front surface, and the grounding surface (of the work place 11) with which the bottom of the rear cover 32 abuts is aligned with the inclination of the bottom of the rear cover 32 to be horizontal. Since it is formed to be inclined from the direction, dust and smoke are prevented from flowing out from between the bottom of the rear cover 32 and the ground contact surface. Further, the rear cover 32 is formed by connecting a plurality of, for example, four metal plates with fixing members (frames) such as bolts, and it is possible to replace only a metal plate that needs to be replaced due to distortion or the like. It is.

An auxiliary seal plate 64 is provided at a lower position in front of or behind the cloth-like front covers 25, 26, 27. The auxiliary seal plate 64 is rotatably attached to the laying iron plate 63a, and the cloth-like front cover 25 is disposed in a state where the movable mount 19 is moved on the rails 12 and 13 to perform work on the work place 11. 26 and 27 are arranged immediately below, and the lower sides of the cloth-like front covers 25, 26 and 27 are sealed.
The auxiliary seal plates 64 are arranged side by side in a plurality (for example, 8 to 10) in the left-right direction, and freely rotate from the 0-degree position to the 90-degree position with respect to the horizontal, and are further inclined to the 90-degree position by the stopper 64a. It can be fixed in the range up to 120 degrees.

Then, by tilting the auxiliary seal plate 64 in the direction of the work place 11 in the range from the 90 degree position to the 120 degree position, smoke generated in the work place 11 is guided to the closed space 18 of the movable work stand 19, and the movable work stand 19. Smoke is prevented from flowing out from the front opening.
Further, by arranging the auxiliary seal plate 64 in the 0 degree direction, it is possible to prevent the auxiliary seal plate 64 from restricting the space for carrying-in work when carrying an object into the work place 11 or the like.
The plurality of auxiliary seal plates 64 can be rotated independently of each other, and have a weight that can be rotated by human force, for example.

In addition to being able to control the advancing and retracting movement of the movable gantry 19 and the raising and lowering of the cloth-like front covers 25, 26, 27 and the rear cover 32 with a control panel (not shown) at a fixed position, remote control with a radio (not shown) It is not necessary for the operator to move to a place with an operation panel in order to perform each operation, and work efficiency can be improved. A control panel 64b connected to the operation panel and fixed to the right side wall portion 50 is provided. The control panel 64b moves forward and backward of the movable gantry 19 according to an input from the operation panel or a wireless device, or is cloth-like. In order to raise and lower the front covers 25, 26, 27 and the rear cover 32, signals are transmitted to each member, component, and the like.

Next, referring to FIG. 4, a gas cutting device (for example, Utility Model Registration No. 3111028 for details) provided with a torch mounting arm 66 slidably mounted with a cutting torch 65 that performs gas cutting in the work place 11. The operation of the mobile dust collecting hood apparatus 10 when cutting a metal piece will be described.
First, the movable gantry 19 is placed at the forward position (shown by a solid line in FIG. 2), and the metal piece to be cut is carried to the place where the work place 11 is in the backward position. Next, in a state where the cloth-like front covers 25, 26, 27 and the rear cover 32 are arranged at the upper limit position, the movable mount 19 is moved backward along the rails 12, 13 (shown by a two-dot chain line in FIG. 2). ) And placed in the work place 11.

Thereafter, the gas cutting device is approached from the front of the movable gantry 19, the main body of the gas cutting device is brought close to the movable gantry 19, and the tip of the torch mounting arm 66 is moved, for example, in the space below the cloth-like front cover 27. The cutting torch 65 is slid to the tip of the torch mounting arm 66 through the metal piece placed on the work place 11.
Next, the cloth-like front covers 25 and 26 and the rear cover 32 are lowered to the lower limit position, and the cloth-like front cover 27 is lowered to cover the torch mounting arm 66 from above at the lower center of the cloth-like front cover 27. Then, the lower sides of the cloth-like front cover 27 are suspended.

Then, the dust collector is operated, and the cutting of the metal piece by the cutting torch 65 is started.
The work space 11 is in a state in which the outflow of air is prevented except for the open space below the torch mounting arm 66, and the open space hangs down on both sides of the lower part of the cloth-like front cover 27. Since the area is made small by the auxiliary seal plate 64 that is inclined and fixed in the range from the 90 degree position to the 120 degree position, dust and smoke generated by cutting the metal pieces are almost outside. It is sucked into the dust collector through the suction hoods 20 and 21 without leaking. Further, smoke generated in the work place 11 is prevented from flowing toward the center of the closed space 18 and flowing out to the outside by the auxiliary seal plate 64 arranged in an inclined manner.

Here, the torch mounting arm 66 can be disposed in the space below the cloth-like front cover 25 or the cloth-like front cover 26, and the torch mounting arm is attached to the lower side of the cloth-like front covers 25, 26, 27. Lower the two where the arm 66 is not disposed to the lowest position, and lower the one where the torch mounting arm 66 is disposed halfway to cut the metal piece while minimizing the opening area. Therefore, even if the arrangement of the torch mounting arm 66 differs depending on the arrangement location of the metal piece, it is possible to reduce the outflow of air.
Furthermore, since the cloth-like front covers 25, 26, 27 have heat resistance, the cloth-like front covers 25, 26, 27 are prevented from being deformed by heat generated during the cutting operation of the metal piece.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions and the like that do not depart from the gist are within the scope of the present invention.
For example, the work place is not limited to the retracted position of the movable platform, and may be disposed at two positions, the forward position and the retracted position. While the movable platform is disposed at the advanced position, the retracted position It is possible to carry in things to the work area, and work efficiency can be improved. In this case, by making the auxiliary seal plate movable, the auxiliary seal plate is arranged at the lower position in front of or behind the cloth-like front cover at both the forward position and the backward position of the movable frame, and the cloth-like front cover is arranged. It is possible to enhance the lower seal.
Further, the number of cloth-like front covers provided in the mobile dust collection hood device is set to a number other than three, for example, 2 depending on the location where the mobile dust collection hood device is arranged, the work contents performed by the mobile dust collection hood device, and the like. Can be one. Furthermore, the number of suction hoods is not limited to two, but can be three or more depending on the lateral width of the movable frame.

10: Mobile dust collection hood device, 11: Work place, 12, 13: Rail, 14: Left front wheel, 15: Left rear wheel, 16: Right front wheel, 17: Right rear wheel, 18: Closed space, 19: Mobile stand 20, 21: suction hood, 22, 23, 24: first elevating means, 25, 26, 27: cloth-like front cover, 28: left guide frame, 29: right guide frame, 31: second elevating means , 31a: bearing, 32: rear cover, 32a: vertical roller, 32b: horizontal roller, 32c: groove, 33, 34: exhaust port, 35: fixed dust collection duct, 36: bellows duct, 37: left wheel drive motor 38: Right wheel drive motor, 39: Left bottom material, 40: Right bottom material, 41, 42: Left vertical material, 43, 44: Right vertical material, 45, 46: Left lifting prevention member, 47, 48: Right lifting prevention member, 49: left side wall, 50: right side wall, 5 : Front wall portion, 52: Rear wall portion, 53: Stair for inspection, 53a: Frame portion, 54: Lifting drive motor, 55: Drive shaft, 56, 57: Sprocket, 59, 60: Chain, 61, 62: Balance weight, 61a, 62a: guide cylinder, 63: drive motor for preliminary lifting, 63a: laying iron plate, 64: auxiliary seal plate, 64a: stopper, 64b: control panel, 65: cutting torch, 66: torch mounting arm

Claims (7)

A mobile dust collection hood device connected to a fixed dust collector and sucking dust generated from the workplace,
Rails provided on the left and right of the workplace;
Wheels that respectively run on the left and right rails are provided at the lower portions on both sides, each having a front opening and a rear opening on the lower front and rear, respectively, and a movable frame that forms a closed space surrounding the work place on the inside,
A suction hood provided above the closed space and opened at the bottom;
A plurality of cloth-like front covers that cover the front opening of the movable frame and can be lifted and lowered independently by the first lifting means;
After being lifted and lowered by a second lifting means along a guide frame inclined forward in the range of 2 to 10 degrees on the rear side of the movable frame to cover the rear opening of the movable frame Side covers,
A fixed dust collection duct connected to an exhaust port disposed at the top of the suction hood;
A movable dust collecting hood apparatus comprising a flexible bellows duct connecting the fixed dust collecting duct to the dust collector. The mobile dust collection hood apparatus according to claim 1, wherein a plurality of the suction hoods are provided side by side in the left-right direction. The movable dust collecting hood apparatus according to claim 1 or 2, wherein the wheels disposed at the lower portions on both sides of the movable frame are respectively disposed before and after the movable frame, and one of the wheels disposed in front or rear is a drive wheel. A mobile dust collecting hood device, wherein the other is a driven wheel. The mobile dust collecting hood apparatus according to any one of claims 1 to 3, wherein the rear cover has a panel-like structure, and the guide frame is formed along an elevation direction of the rear cover, A mobile dust collecting hood apparatus comprising a groove into which guide wheels provided on both sides of the rear cover are inserted. The movable dust collecting hood apparatus according to claim 4, wherein the rear cover is connected to one end of a left and right chain that meshes with a sprocket provided on a drive shaft disposed on an upper part of the movable frame, A movable dust collection hood apparatus, wherein a balance weight is connected to the other ends of the left and right chains. The mobile dust collecting hood apparatus according to any one of claims 1 to 5, wherein the cloth-like front cover is rotatably attached to a laying iron plate at a lower position in front of or behind the cloth-like front cover. A mobile dust collecting hood device, characterized in that an auxiliary sealing plate for sealing the lower side of the front cover is provided. 7. The mobile dust collecting hood apparatus according to claim 6, wherein a plurality of the auxiliary seal plates are arranged side by side, each of which freely rotates from the 0 degree position to the 90 degree position with respect to the horizontal, and further tilted to 90 with a stopper. A movable dust collecting hood device that can be fixed in a range from 120 degrees to 120 degrees.

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