JP7293954B2 - Surface treatment equipment, auxiliary floor forming equipment and protection wall forming equipment used when using surface treatment equipment - Google Patents

Description

The present invention relates to a surface treatment apparatus for injecting an abrasive material to prepare a surface to be treated, an auxiliary floor forming apparatus and a protective wall forming apparatus used when the surface treatment apparatus is used.

For example, in bridge deck replacement work, when removing the existing concrete floor slab on top of the steel main girder and installing a new deck, a disc sander grinder is used to remove the existing deck slab. After removing the main girder, we perform surface treatment to remove concrete residue, anchor reinforcing bars, and rust on the main girder. Since work using such a power tool requires a great deal of time and effort, it has been necessary to mobilize a large number of workers to prepare a wide area of the upper surface of the main girder in a short time.

Under such circumstances, in order to improve the efficiency of the surface preparation work, after carrying out surface treatment widely and shallowly to the extent that concrete scum and rust on the main girders are removed by the blasting method, the remaining anchor reinforcing bars, etc. are removed by power tools. is being studied. The blasting method is a method of treating the surface by injecting an abrasive material under high pressure onto the target surface. Scattering such as For this reason, in general, a device having a function of injecting the abrasive and a function of collecting the ejected abrasive and dust is used for the work.

For example, Patent Literature 1 discloses an abrasive cleaning material ejected toward a surface to be treated from a swingable ejection nozzle, and an ejection chamber for preventing scattering and collecting dust separated from the surface to be treated by the abrasive cleaning material. An oscillating sandblasting machine with a casing is disclosed. The casing of this oscillating sandblasting machine has an injection chamber opening at the lower end facing the surface to be treated, and wheels for running on the surface to be treated are provided around the opening of the injection chamber. attached to the flange.

JP-A-1-301067

Patent document 1 is a small and flat device, which is suitable when the surface to be processed is located in a narrow area. However, there is a range between the injection chamber opening and the wheel where surface treatment cannot be performed.

For this reason, if you try to apply it to a band-shaped surface to be treated, such as the top surface of the main girder after removing the existing floor slab, there will be an untreated area near the edge of the top surface of the main girder after the device has passed. It is assumed that it will remain. In addition, if you try to perform surface treatment on the inner corner formed at the interface between the upper surface of the main girder and the cut surface of the existing floor slab, the flanges and wheels provided around the opening of the injection chamber may cause the opening of the injection chamber. cannot be placed up to the inner corner. In either case, the working efficiency is poor because it is necessary to perform the surface treatment again by another method.

The present invention has been made in view of such problems, and its main object is to provide a surface treatment apparatus capable of efficiently performing base treatment on a surface to be treated, and an auxiliary floor used when using the surface treatment apparatus. It is to provide a forming device and a protective wall forming device.

In order to achieve this object, the surface treatment apparatus of the present invention has an injection nozzle for injecting an abrasive material toward a surface to be treated, and a collection port for collecting the injected abrasive material. A scattering prevention housing having a lower end opening facing the surface to be processed, a supporting device main body supporting the scattering prevention housing, and a width for adjusting the mounting width when the scattering prevention housing is mounted on the supporting device main body. a support device having an adjustment device ; and a travel device equipped with the support device, wherein the anti-scattering housing is arranged adjacent to the outside of the travel device via the support device, and A size of an abrasive injection space formed inside the anti-scattering housing and in which the injection nozzle is arranged is changeable, and the size of the abrasive injection space of the supporting device main body is changeable. The mounting width is adjusted via the width adjusting device each time the mounting is performed .

Further, in the surface treatment apparatus of the present invention, the injection nozzle is arranged so as to be swingable in a direction perpendicular to the traveling direction of the traveling device, and the abrasive injection space is parallel to the swinging direction of the injection nozzle. width is changeable.

According to the surface treatment apparatus of the present invention, since the size of the abrasive injection space provided in the anti-scattering housing can be changed freely, the spraying range of the abrasive against the surface to be treated can be freely adjusted. , it is possible to improve workability.

In addition, since the anti-scattering housing is arranged adjacently to the outside of the traveling device, even when the surface to be treated is located in an internal corner, the anti-scattering housing can be arranged close to the internal corner. and there is no area where surface treatment cannot be performed due to the travel device becoming an obstacle.

In the surface treatment apparatus of the present invention, the inside of the anti-scattering housing is divided into the abrasive injection space and the abrasive recovery space surrounding the abrasive injection space, and the abrasive recovery space is and communicating with the abrasive injection space, and the recovery port is arranged.

According to the surface treatment apparatus of the present invention, since the abrasive injection space into which the abrasive is injected is surrounded by the abrasive recovery space, the abrasive is directly scattered outwardly from the anti-scattering housing. It is possible to prevent the phenomenon, the phenomenon that the abrasive material collided with the surface to be processed and rebounded, and the dust peeled off from the surface to be processed leaks to the outside.

In addition, since the abrasive recovery space is provided with the abrasive recovery port, when the dust collector connected to the recovery port via the recovery hose is operated, a negative pressure acts on the abrasive recovery space. , a flow path is formed from the communicating portion with the abrasive injection space to the recovery port through the abrasive recovery space. As a result, the abrasive injected into the abrasive injection space, the abrasive colliding with the surface to be treated, and the dust separated from the surface to be treated efficiently and smoothly flow into the abrasive collecting space. It is possible to suck and recover the liquid at the recovery port.

Further, in the surface treatment apparatus of the present invention, the injection nozzle for injecting the abrasive toward the surface to be treated and the recovery port for recovering the ejected abrasive are arranged inside, and the lower end opening is the above-mentioned. A scatter prevention housing facing a surface to be treated, a support device for supporting the scatter prevention housing, and a traveling device equipped with the support device, wherein the scatter prevention housing is mounted via the support device. and an abrasive injection space disposed adjacent to the outer side of the traveling device and on the rearward side of the traveling device in the traveling direction, formed inside the scattering prevention housing, and having the size of the abrasive injection space in which the injection nozzle is arranged. The surface to be processed is the upper surface of the main girder of the bridge.

According to the surface treatment apparatus of the present invention, the size of the abrasive injection space of the anti-scattering housing is adjusted so as to match the width of the main girder, and the traveling device is caused to travel on the upper surface of the main girder in the axial direction of the main girder. This makes it possible to evenly prepare the surface of the top surface of the main girder in one run, which not only improves workability but also significantly reduces work time.

The auxiliary floor forming apparatus of the present invention is an auxiliary floor forming apparatus used when the surface treatment apparatus of the present invention is used, comprising: a mounting fixture detachably installed on the lower surface of the upper flange of the main girder; The auxiliary floor main body is provided with a support plate fixed to the fitting, and an auxiliary floor main body which is installed on the support plate and protrudes laterally from the side surface of the upper flange so that the anti-scattering housing can travel.

According to the auxiliary floor forming apparatus of the present invention, when the auxiliary floor forming apparatuses are installed on both sides of the main girder, which is the surface to be treated, and the auxiliary floor main body is projected from both sides of the main girder, scattering of a width larger than the main girder occurs. A protective housing can be employed. As a result, the width of the space for spraying the abrasive can be matched to the width of the upper surface of the main girder or it can be secured to be larger than that, so that the abrasive can be sprayed uniformly over the entire upper surface of the main girder, and the occurrence of unprocessed material can be reduced. It is possible to prevent this and form a homogeneous treated surface.

Also, for example, in the case where the upper surface of the main girder is treated after the existing floor slab has been removed, if casters are provided at the lower end of the anti-scattering housing and these casters are run on the floor surface of the auxiliary floor main body, the auxiliary floor Since the floor surface of the floor body is generally flat, vertical fluctuations can be minimized. As a result, compared to the case of running on the top surface of the main girder where concrete residue, anchor reinforcing bars, rust generated on the main girder, etc. remain, the abrasive material injected in the abrasive material injection space and the object to be processed It is possible to enhance the effect of preventing the phenomenon that the dust separated from the surface leaks outward from the lower end of the anti-scattering housing.

The protective wall forming apparatus of the present invention is a protective wall forming apparatus used when using the surface treatment apparatus of the present invention, comprising: a mounting tool detachably installed on the lower surface of the upper flange of the main girder; and a protective wall main body which is installed on the support plate and protrudes upward from the side surface of the upper flange and can come into contact with the outer surface of the anti-scattering housing. .

According to the protective wall forming apparatus of the present invention, when the protective wall forming apparatus is installed on both sides of the main girder, which is the surface to be treated, and arranged on both sides of the main girder, an event in which the anti-scattering housing deviates from the upper surface of the main girder can be prevented. can be prevented. In addition, when the anti-scattering housing moves up and down on the upper surface of the main girder, the abrasive sprayed in the spray space and the dust separated from the surface to be treated will flow out from the lower end of the anti-scattering housing. It is possible to reliably prevent leakage in the direction.

According to the present invention, since the size of the abrasive injection space provided in the anti-scattering housing can be changed freely, not only can the spraying range of the abrasive to the surface to be treated be freely adjusted, but also the main When the upper surface of the girder is the surface to be treated, the width of the abrasive injection space can be adjusted to match the width of the upper surface of the main girder by using an auxiliary floor forming device, which greatly improves work efficiency. In addition, it is possible to form a uniform processed surface on the surface to be processed without any unprocessed residue.

It is a figure which shows the side surface of the surface treatment apparatus in embodiment of this invention. It is a figure which shows the detail of the blast injection apparatus and the anti-scattering housing which were provided in the surface treatment apparatus in embodiment of this invention. It is a figure which shows the plane of the surface treatment apparatus in embodiment of this invention. It is a figure which shows the example of the expandable/contractible anti-scattering housing in embodiment of this invention (1). It is a figure which shows the example of the expandable/contractible anti-scattering housing in embodiment of this invention (2). FIG. 4 is a diagram showing a scattering prevention housing having no abrasive collecting space in the embodiment of the present invention; FIG. 2 is a diagram showing a surface treatment device and an auxiliary floor forming device employed for surface treatment of the main girder according to the embodiment of the present invention; FIG. 4 is a diagram showing how the surface treatment apparatus and the auxiliary floor forming apparatus according to the embodiment of the present invention are used for base treatment of the main girder. It is a figure which shows the operation method at the time of doing. It is a figure which shows the surface treatment apparatus and protective wall formation apparatus which are employ|adopted for the base treatment of the main girder in embodiment of this invention.

≪≪Surface treatment equipment≫≫
As shown in FIG. 1, the surface treatment apparatus 1 arranged on the surface A to be treated includes a blast injection device 2, a support device 8 for supporting the blast injection device 2, and a traveling device 11 equipped with the support device 8. , provided.

The blast injection device 2 is a device for injecting the abrasive material M toward the surface A to be treated, and includes a blast hose 3, a scattering prevention housing 4, and a recovery hose 5. The blast hose 3 is , the abrasive material M conveyed together with compressed air is supplied to an injection nozzle 31 attached to the tip thereof, and the injection nozzle 31 is inserted into the scattering prevention housing 4 .

The recovery hose 5 has at its tip a recovery port 51 for recovering the abrasive material M injected from the injection nozzle 31 and the dust separated from the surface to be processed A by the abrasive material M. Similarly, a recovery port 51 is inserted into the shatterproof housing 4 . The recovery hose 5 is connected to a dust collector (not shown), and the dust separated from the surface to be treated A by operating the dust collector is sucked and recovered from the recovery port 51 .

The anti-scattering housing 4, as shown in FIG. 2(a), is a box having a lower end opening 45 at the bottom facing the surface A to be treated, and comprises a cylindrical main body 41 arranged in an upright shape, A top plate 42 closing an upper opening of the tubular main body 41 and casters 43 installed on the lower inner peripheral surface of the tubular main body 41 are provided.

The top plate 42 has an abrasive supply hole (not shown) formed substantially in the center thereof, through which the blast hose 3 is inserted with the injection nozzle 31 directed toward the lower end opening 45 . On the other hand, the cylindrical main body 41 has a cleaning material recovery hole (not shown) formed at an appropriate place, through which the recovery hose 5 is inserted, and casters 43 are installed near the lower end.

The casters 43 are provided inside each of a plurality of caster storage portions 411 installed on the inner peripheral surface of the lower portion of the cylindrical body 41. It is supported as it is formed. However, this gap is closed by a sealing member 44 which is installed in a hanging state on the outer circumference of the lower end of the cylindrical body 41, and the abrasive material M injected from the injection nozzle 31 and the abrasive material M to be processed. The dust separated from the target surface A does not leak out.

Any material, such as a rubber sheet or a seal brush, may be used as the sealing material 44 as long as it can close the gap between the lower end of the cylindrical main body 41 and the surface A to be processed. Further, the abrasive material M may be any granular material such as alumina, iron, garnet, stainless steel, etc., as long as it is a granular material capable of pre-treating the surface A to be treated when sprayed toward the surface A to be treated at a constant pressure. However, alumina is adopted in the present embodiment.

As shown in FIG. 2(a), the anti-scattering housing 4 further includes an inner cylindrical body 46 arranged concentrically with the cylindrical body 41 and shorter than the cylindrical body 41, and suspended from the top plate 42. is provided. As a result, the inside of the anti-scattering housing 4 is divided into an inner space of the inner cylindrical body 46 and an outer space. is formed.

Since the injection nozzle 31 of the blast hose 3 is arranged in the abrasive injection space 47 and the recovery port 51 of the recovery hose 5 is arranged in the abrasive recovery space 48, the dust collector to which the recovery hose 5 is connected. (not shown) is actuated, a negative pressure acts on the abrasive collecting space 48 . Then, as shown in FIGS. 2(a) and 2(b), from the communicating portion 49 which is an opening formed between the lower end portion of the inner cylindrical body 46 shorter than the cylindrical main body 41 and the surface A to be processed, A flow path toward the recovery port 51 is formed.

In this state, when the abrasive material M is injected from the injection nozzle 31, the abrasive material M colliding with the surface A to be processed and the inner cylindrical body 46 and the dust separated from the surface to be processed A are efficiently communicated. It flows into the abrasive recovery space 48 from the portion 49 and is smoothly recovered in the recovery port 51 .

The negative pressure acting on the abrasive material recovery space 48 not only forms a flow path toward the recovery port 51, but also presses the sealing material 44 provided on the cylindrical main body 41 against the surface A to be processed. bring about action. On the other hand, since the abrasive material M injected from the injection nozzle 31 is sprayed within the range of the abrasive material injection space 47 , the abrasive material M is applied to the sealing material 44 provided in the cylindrical main body 41 . No direct conflict.

As a result of these events, the anti-scattering housing 4 reliably prevents the abrasive material M injected from the abrasive material injection space 47 and the dust separated from the surface A to be polished from leaking to the outside. It is possible to cause the dust collector to collect and suck the cleaning material from the cleaning material collection space 48 through the collection hose 5 .

A hose attachment device 6 is installed on the upper portion of the anti-scattering housing 4 for supporting the blast hose 3 in an upright position and swinging the injection nozzle 31 within the anti-scattering housing 4 .

The hose mounting device 6 includes a support shaft member 61 that supports the blast hose 3 inserted into the top plate 42 of the anti-scattering housing 4, and a swing mechanism support base 62 that is installed on the support shaft member 61. there is As shown in FIGS. 2(a) and 3(a), the support shaft member 61 includes a horizontal support shaft 611 which supports the blast hose 3 from the side while allowing it to rotate in the vertical plane, and a horizontal support shaft. 611 and a bearing 612 , and the bearing 612 is fixed on the top plate 42 of the anti-scattering housing 4 .

As shown in FIG. 2A, the rocking mechanism support base 62 is installed above the bearing 612 so as to be positioned above the top plate 42, and is supported so as to be freely rotatable in the vertical plane. A rocking mechanism 7 for rocking the blast hose 3 is supported.

As shown in FIGS. 2(a) and 3(a), the swinging mechanism 7 is arranged to protrude to the side of the anti-scattering housing 4 in the direction in which the blast hose 3 swings. A swing shaft 72 is arranged parallel to the horizontal support shaft 611 supporting the blast hose 3 and rotates in the vertical direction when the swing handle 71 is operated. It has a rod-like crank 73 that rotates in the vertical plane by the rotation of .

One end of a swing arm 75 is connected to the other end of the crank 73 via a pin, and the other end of the swing arm 75 is connected to a hose holder 74 attached to the blast hose 3 . is connected via a pin to Further, the hose holder 74 is installed at a height position above the horizontal support shaft 611 with respect to the blast hose 3, as shown in FIG.

As a result, when the swing shaft 72 is rotated via the swing handle 71, the blast hose 3 moves vertically around the horizontal support shaft 611 via the crank 73, the swing arm 75, and the hose holder 74. An oscillating external force is applied. Then, the injection nozzle 31 installed at a height position below the horizontal support shaft 611 of the blast hose 3 also swings within the abrasive injection space 47 .

The crank 73 of the swing mechanism 7 is provided with a plurality of through-holes (not shown) for pins used when connecting with one end of the swing arm 75 in the longitudinal direction. By adjusting the connecting position with one end of the nozzle 31 at the position of the insertion hole, it is possible to adjust the swing width L1 when the injection nozzle 31 swings. However, the method of adjusting the swing width L1 is not limited to this. For example, as shown in FIG. By freely installing and adjusting this height position, the swing width L1 when the injection nozzle 31 swings may be adjusted.

Considering that the blast hose 3 swings, the blast hose 3 and the abrasive supply hole provided in the top plate 42 of the anti-scattering housing 4 and through which the blast hose 3 is inserted are elongated holes extending in the swing direction. is formed in However, a flexible packing, cloth material, or the like (not shown) is attached between the abrasive supply hole and the blast hose 3 to suppress leakage of the abrasive M, which tends to occur from the gap between the two. are doing.

The blast injection device 2 configured as described above sprays the abrasive M over the spraying range defined by the abrasive injection space 47 in the anti-scattering housing 4 while swinging the injection nozzle 31 . It can be sprayed toward and the base treatment can be performed.

Therefore, when it is desired to control the spraying range of the abrasive material M, the size of the abrasive material injection space 47 may be appropriately adjusted. Therefore, in the present embodiment, a plurality of anti-scattering housings 4 having different sizes of the abrasive injection space 47 are prepared, and by exchanging them, an optimum abrasive can be selected according to the conditions of the site where the surface treatment is performed. It is possible to set the spraying range of M.

In particular, a plurality of scattering prevention housings 4 are prepared in which the width parallel to the direction in which the injection nozzle 31 swings in the abrasive spray space 47 is variable. By adjusting the oscillation width L1 of 31, the abrasive material M can be uniformly sprayed onto the surface A to be processed. Note that the width parallel to the direction in which the injection nozzle 31 swings includes not only complete parallel to the direction in which the injection nozzle 31 swings but also substantially parallel.

In this embodiment, as shown in FIGS. 3A and 3B, two types of anti-scattering housings 4 having different widths (vertical direction in FIG. 3) parallel to the direction in which the injection nozzle 31 swings are provided. are preparing. The blast injection device 2 having such a configuration is detachably attached to the support device 8 so as to be sandwiched from the side.

As shown in FIG. 3A, the support device 8 includes a support device main body 9 formed in a ladder shape and a width adjustment device for adjusting a mounting width L2 when the blast injection device 2 is mounted on the support device main body 9. 10, and the support device main body 9 is composed of a pair of movable members 91 and a plurality of telescopic shafts 92 connecting the movable members 91 to each other.

A pair of movable members 91 are each made of a long square bar and are arranged in parallel so as to extend in the horizontal direction. there is

The mounting area 93 is an area in which the blast injection device 2 is detachably mounted on each of the pair of movable members 91, and the blast injection device 2 is arranged such that the direction of the swing width L1 of the injection nozzle 31 is parallel to the mounting width L2. , and the cylindrical main body 41 of the anti-scattering housing 4 is installed on each of the pair of movable members 91 .

Therefore, as shown in FIGS. 3(a) and 3(b), when a plurality of anti-scattering housings 4 having variable widths parallel to the direction in which the injection nozzle 31 swings are prepared, the anti-scattering housings 4 is replaced, the mounting width L2 is adjusted by appropriately extending and retracting the plurality of telescopic shafts 92 connecting the movable members 91 .

The plurality of telescopic shafts 92 are formed to be variable in length by a hollow tubular outer tube 921 and a pair of inner rods 922 that can protrude and retract from both open end portions of the outer tube 921 . The projecting ends of the pair of inner rods 922 are fixed to the movable member 91 respectively.

As a result, when an external force is applied to the pair of movable members 91 through the width adjusting device 10 so as to reduce the mounting width L2 of the mounting area 93, the telescopic shaft 92 is moved as shown in FIG. When the inner rod 922 enters the outer tube 921 and is shortened and an external force is applied to expand the installation width L2, the telescopic shaft 92 projects the inner rod 922 from the outer tube 921 as shown in FIG. 3(a). The length is lengthened.

As shown in FIGS. 3A and 3B, the width adjusting device 10 includes a fully threaded bolt 101, a width adjusting handle 102 for rotating the fully threaded bolt 101 around an axis, and a support base for rotatably supporting the fully threaded bolt 101. 103. The support frame 103 is fixed to the upper surface of each outer tube 921 so as to straddle a plurality of telescopic shafts 92 . Thereby, the fully threaded bolt 101 is arranged parallel to the pair of movable members 91 extending in the horizontal direction. The width adjusting handle 102 is attached to one end of the fully threaded bolt 101 .

A moving body 104 having a nut is attached to the fully threaded bolt 101, and one end of each of a pair of pushing rods 105 is rotatably installed on the moving body 104. As shown in FIG. The other ends of the pair of pushing rods 105 are rotatably mounted on the pair of movable members 91 respectively.

As a result, the fully threaded bolt 101 is rotated via the width adjusting handle 102, and when the pair of pushing rods 105 moves the moving body 104 in the direction orthogonal to the movable member 91, as shown in FIG. Thus, the mounting width L2 of the mounting area 93 can be expanded. On the other hand, when the moving body 104 is moved in the direction in which the pair of pushing rods 105 are parallel to the movable member 91, the mounting width L2 of the mounting area 93 is reduced as shown in FIG. 3(b). can be done.

The support device 8 on which the blast injection device 2 is mounted is mounted on a traveling device 11 as shown in FIG.

The traveling device 11 is provided with a vehicle body 111 and traveling wheels 112, and is in the form of a so-called carriage in which pushers 113 are provided on the vehicle body 111. As shown in FIG. Hereinafter, the direction in which the travel device 11 is pushed out using the pusher 113 of the vehicle body 111 is referred to as the forward travel side (left direction in FIG. 1), and the direction in which the travel device 11 is pulled back is referred to as the backward travel direction in the travel direction (right direction in FIG. 1).

The travel wheels 112 employ swiveling shock-absorbing casters with springs to absorb shocks even when the surface A to be treated is uneven, thereby enabling stable travel.

Further, the vehicle body 111 on which the traveling wheels 112 are installed has the supporting device 8 installed on the upper part thereof, and as shown in FIG. It is arranged so as to protrude from 111. The blast injection device 2 is attached to the vehicle body 111 via the support device 8 with the direction in which the injection nozzle 31 swings in the direction orthogonal to the traveling direction of the traveling device 11 . The direction orthogonal to the running direction includes not only a direction completely orthogonal to the running direction but also a direction substantially orthogonal to the running direction.

Thus, by moving the traveling device 11 on the surface A to be processed, the direction in which the injection nozzle 31 swings (the width of the abrasive injection space 47) is set as the working width, and the traveling device 11 is moved. It is possible to perform foundation treatment in a range in which the length of construction is the distance that is applied.

In addition, since the blast injection device 2 is arranged adjacent to the outside of the travel device 11 via the support device 8, the size of the abrasive injection space 47 is not affected by the size of the travel device 11. It is possible to employ shatterproof housings 4 of various shapes with different thicknesses. Therefore, it is possible to freely adjust the spraying range of the abrasive material M to the surface A to be processed, and to improve workability.

Furthermore, as shown in FIG. 1, even when the surface A to be processed is positioned at the inside corner A1, the travel device 11 is moved backward to dispose the anti-scattering housing 4 close to the inside corner A1. This eliminates the presence of an area where the base treatment cannot be performed due to the travel device 11 becoming an obstacle.

In addition, in the present embodiment, the counterweight 114 is provided above the support device 8 via the counterweight support base 115, but it is not always necessary to provide it.

Further, in this embodiment, a plurality of anti-scattering housings 4 having different sizes of the abrasive injection space 47 are prepared, and by exchanging them, the optimum abrasive M can be selected according to the conditions of the site where the surface treatment is performed. was set. However, the present invention is not limited to this, and for example, the size of the abrasive spray space 47 may be changed by enlarging or shrinking the outer shape of the anti-scattering housing 4 .

≪Expandable shatterproof housing≫
Specifically, as shown in FIG. 4( a ), the anti-scattering housing 4 is formed in a rectangular parallelepiped shape, and is composed of a non-moving body 13 and a pair of moving bodies 14 . The moving body 14 has an inner wall 141 that is U-shaped in plan view and an outer wall 142 that is also U-shaped in plan view, and a U-shaped groove is formed between them. The inner wall 141 has the same upper end height as the outer wall 142 , but has a lower end height higher than that of the outer wall 142 .

On the other hand, the non-moving body 13 includes the top plate 42, a pair of hanging outer walls 132 hanging down from the outer edge of the long side of the top plate 42, and a pair of hanging inner walls arranged in parallel with the hanging outer walls 132 and hanging down from the top plate 42. 131 , and a groove is formed between the hanging outer wall 132 and the hanging inner wall 131 . The hanging inner wall 131 is formed so that the lower end height is higher than the hanging outer wall 132 .

As shown in FIG. 4(b), the pair of moving bodies 14 are arranged so that the inner walls 141 face each other, and the opposing portions of the pair of moving bodies 14 are attached to the hanging inner walls 131 of the unmoving body 13. It is stored between the hanging outer walls 132. - 特許庁At this time, the drooping inner wall 131 and the drooping outer wall 132 are arranged so that the outer wall 142 of the moving body 14 and the drooping outer wall 132 of the unmoving body 13 are in contact with each other, and the inner wall 141 of the moving body 14 and the drooping inner wall 131 of the unmoving body 13 are in contact with each other. Adjust the spacing.

Then, the inner cylindrical body 46 is formed by the inner wall 141 of the moving body 14 and the hanging inner wall 131 of the non-moving body 13 , and the cylindrical body 41 is formed by the outer wall of the moving body 14 and the hanging outer wall of the non-moving body 13 . As a result, an abrasive injection space 47 is formed in the inner space of the inner cylinder 46, and an abrasive recovery space 48 is formed in the outer space. The size of the abrasive injection space 47 is reduced by moving the pair of moving bodies 14 toward each other, and is enlarged by moving them away from each other. Note that the pair of moving bodies 14 can be moved within the range of the top plate 42 in plan view.

As shown in FIG. 5, the anti-scattering housing 4 having such a shape has an elastic member 133 interposed between the hanging inner wall 131 and the hanging outer wall 132 of the non-moving body 13 and the inner wall 141 of the moving body 14. A spacer 143 is interposed between the outer wall 142 and the outer wall 142 . As a result, for example, the recovery port 51 of the recovery hose 5 is inserted into the cleaning material recovery space 48 from the outer wall 142 of one of the pair of moving bodies 14 to operate the dust collector.

Then, since a negative pressure acts on the abrasive collecting space 48, the hanging inner wall 131 and the hanging outer wall 132 of the non-moving body 13, in which the elastic member 133 is interposed, approach each other, while the inner wall 141 of the moving body 14 moves closer to each other. Since the spacer 143 is interposed between the outer wall 142 and the outer wall 142, the width of the groove formed between them is maintained.

As a result, the hanging inner wall 131 is pressed against the inner wall 141 of the moving body 14 to seal the mutual joint, and the hanging outer wall 132 is also pressed against the outer wall 142 of the moving body 14 to seal the mutual joint. . Furthermore, the top plate 42 of the non-moving body 13 is pressed against the inner wall 141 and the outer wall 142 of the pair of moving bodies 14, so that the abutting portions between them are also sealed.

Therefore, even if the non-moving body 13 and the pair of moving bodies 14 are assembled to form the anti-scattering housing 4, the abrasive material M injected from the abrasive material injection space 47 and the surface A to be processed are separated. The dust is efficiently collected and sucked by the dust collector from the abrasive collecting space 48 through the collecting hose 5, and does not leak to the outside. At this time, the injection nozzle 31 arranged in the abrasive injection space 47 swings in the direction in which the abrasive injection space 47 expands and contracts.

By using the scattering prevention housing 4 whose size of the abrasive injection space 47 can be changed in this way, the trouble of preparing a plurality of scattering prevention housings 4 having different sizes of the abrasive injection space 47 can be omitted. It becomes possible. On the other hand, by preparing a plurality of anti-scattering housings 4 in which the size of the abrasive injection space 47 can be changed by changing the size and shape of the outer shape, etc., the object surface A to be processed under various environments can be protected. It is possible to perform a surface treatment by spraying the abrasive material M on the surface.

In this embodiment, the anti-scattering housing 4 is formed in a rectangular parallelepiped shape, but the shape is not limited to this, and may be formed in any shape such as a truncated quadrangular pyramid.

Further, in this embodiment, as means for changing the size of the abrasive injection space 47, a plurality of scattering prevention housings 4 having different sizes of the abrasive injection space 47 are prepared, and the scattering prevention housing 4 However, as long as it has a structure capable of changing the size of the abrasive injection space 47, it is not limited to the above method.

Further, if the anti-scattering housing 4 is arranged adjacent to the traveling device 11 , it may not necessarily be on the backward side in the traveling direction, and may be arranged at a position running parallel to the traveling device 11 , for example.

Further, in this embodiment, the anti-scattering housing 4 is provided with an abrasive recovery space 48 in both cases where the size of the abrasive injection space 47 can be changed or not. However, it is not necessarily limited to this, and as shown in FIG.

In addition, the traveling device 11 may be one capable of automatically traveling, and the width adjusting device 10 for adjusting the mounting width L2 of the mounting area 93 where the blast injection device 2 is arranged is also operated by a worker using the width adjusting handle 102. It may be automated instead of manual by Furthermore, the swinging handle 71 for swinging the blast hose 3 may also be automated using a motor or the like instead of manual operation by an operator. Further, the surface A to be treated, which has undergone surface treatment by the surface treatment apparatus 1, may be any of, for example, an iron plate surface, a steel plate surface, a floor surface requiring surface treatment, and the like.

≪≪Example of using surface treatment equipment for surface treatment of main girders≫≫
The surface treatment apparatus 1 having the above configuration is adopted for the work of surface treatment of the main girder upper surface 121 after removing the existing floor slab in the floor slab replacement work of a bridge in which steel girders made of I-shaped steel are adopted for the main girder 12. The following is an example of the operation procedure.

Before describing the operation procedure of the surface treatment apparatus 1, the auxiliary floor forming apparatus 15 used when the surface treatment apparatus 1 is used on the upper surface 121 of the main girder will be described.

≪Auxiliary floor forming device≫
As shown in FIG. 7(a), on the lower surface of the upper flange of the main girder 12, auxiliary floor forming devices 15 are installed on both sides of the web. The auxiliary floor forming device 15 is composed of a mounting fixture 151 installed on the main girder 12 , a support plate 152 fixed to the mounting fixture 151 , and an auxiliary floor main body 153 installed on the support plate 152 .

The auxiliary floor main body 153 is made of a strip-shaped steel plate extending in the axial direction of the main girder 12, and serves as a running surface on which the casters 43 of the anti-scattering housing 4 travel when the main girder upper surface 121 is surface-treated using the surface treatment apparatus 1. as well as a contact surface for the sealing material 44 .

It should be noted that although any of the fittings 151 and the support plates 152 used when installing the auxiliary floor body 153 on the main girder 12 may be adopted, in the present embodiment, the fittings 151 for the main girder 12 are A detachable magnet is used. A flat plate is adopted as the support plate 152 , and when the mounting tool 151 is installed on the lower surface of the upper flange of the main girder 12 , it is arranged parallel to the upper flange of the main girder 12 . One side of the auxiliary floor main body 153 is bolted to the support plate 152, so that the auxiliary floor main body 153 is arranged so as to protrude outward from the upper flange side of the main girder 12 in a cantilevered state.

In this way, when the auxiliary floor body 153 is projected from both sides of the main girder 12, the anti-scattering housing 4 having a width larger than the main girder 12 is adopted, and its casters 43 are arranged on the auxiliary floor body 153 to make it run. be able to. Then, the width of the abrasive injection space 47 provided in the scattering prevention housing 4 can be matched with the width of the main girder upper surface 121 or can be ensured to be larger than that, so that the entire surface of the main girder upper surface 121 can be uniformly sprayed. The abrasive material M can be sprayed, and it is possible to prevent the occurrence of unprocessed surfaces and form a homogeneous processed surface.

In addition, since the floor surface of the auxiliary floor main body 153 is generally flat, after removing the existing floor slabs, the vehicle travels on the main girder upper surface 121 where concrete residue, anchor reinforcing bars, rust on the main girder, etc. remain. As compared with the case, the vertical movement of the anti-scattering housing 4 is small, and the state in which the sealing member 44 is always in contact with the floor surface of the auxiliary floor main body 153 can be maintained. Therefore, the abrasive M ejected from the abrasive ejection space 47 and the dust separated from the surface A to be treated do not leak outward from the lower end of the anti-scattering housing 4 .

<<Operating procedure of surface treatment equipment>>
A worker operates the width adjustment device 10 via the width adjustment handle 102 on the main girder 12 on which the auxiliary floor forming device 15 is installed in advance, and the installation width L2 of the installation area 93 where the blast injection device 2 is installed. to match the outside width of the anti-scattering housing 4 to be mounted. Next, the shatterproof housing 4 is placed in the mounting area 93 and joined to the pair of movable members 91 . The anti-scattering housing 4 is selected in advance such that the width of the abrasive injection space 47 matches the width of the flange of the upper surface 121 of the main girder.

Before, after, or at the same time as the above work, the blast hose 3 is installed via the hose attachment device 6 having the swinging mechanism 7 to the anti-scattering housing 4, and the injection nozzle 31 is installed in the abrasive injection space 47. Insert inside. Also, the recovery port 51 of the recovery hose 5 is inserted into the abrasive recovery space 48 to form the blast injection device 2 .

Then, as shown in FIG. 7(a), the anti-scattering housing 4 is placed on the auxiliary floor body 153 via the casters 43, and the abrasive injection space 47 faces the entire top surface 121 of the main girder. A gap formed between the lower end portion of the anti-scattering housing 4 and the auxiliary floor main body 153 is closed by a sealing material 44 that hangs down on the outer circumference of the lower end portion of the cylindrical main body 41 .

Although the traveling wheels 112 of the traveling device 11 travel on the main girder 12, as described above, by adopting the shock-absorbing casters, concrete residue and anchors left by removing the existing floor slab on the main girder upper surface 121 can be removed. Even if there are streaks or the like, the vehicle can be driven while minimizing vibrations.

Using the surface treatment device 1 installed as described above, work related to surface treatment is started to remove concrete residue remaining on the top surface 121 of the main girder after removing the existing floor slab, rust generated on the main girder 12, and the like. .

First, the dust collector (not shown) connected to the recovery hose 5 is operated to create a negative pressure in the abrasive cleaning material recovery space 48 of the anti-scattering housing 4, and the sealing material 44 is moved to the floor of the auxiliary floor main body 153. press against the surface. Next, while operating the blast injection device 2 , the operator rotates the swing handle 71 to swing the injection nozzle 31 in the width direction of the flange of the main girder 12 . Abrasive material M is jetted toward. At this time, the swing width L1 of the injection nozzle 31 is made to correspond to the width of the abrasive injection space 47 so that the abrasive M is injected toward the entire abrasive injection space 47 .

Then, the abrasive material M is evenly applied to the entire surface of the main girder upper surface 121 in the flange width direction, and the concrete remaining on the main girder upper surface 121 and the main girder 12 are evenly hit. It is possible to peel off rust and the like that have occurred. Dust such as concrete and rust generated on the main girder 12 separated by the abrasive M and the abrasive M are recovered from the communicating portion 49 formed below the inner cylindrical body 46 as described above. It flows into the space 48 and is smoothly sucked and recovered by the recovery hose 5 through the recovery port 51 .

In this state, as shown in FIG. 8( a ), the worker pushes the surface treatment device 1 in the axial direction of the main girder 12 via the pushing hand 113 of the traveling device 11 . Further, as shown in FIG. 7(b), the auxiliary floor forming device 15 is sequentially rebuilt in the forward direction along with the movement of the surface treatment device 1. As shown in FIG. As a result, the width of the abrasive injection space 47, that is, the flange width of the main girder upper surface 121 is defined as the construction width, and the distance over which the traveling device 11 moves on the main girder 12 in the axial direction is defined as the construction length. , and there is no need to go back and forth on the top surface 121 of the main girder many times.

Since the blast injection device 2 is arranged on the rearward side of the traveling device 11 in the traveling direction, that is, on the operation position side of the operator, the operator can finish the main girder upper surface 121 after the surface treatment device 1 has passed. You can proceed with the work while visually confirming the Therefore, when it is determined that the surface treatment on the upper surface 121 of the main girder is not sufficient, the surface treatment device 1 is moved backward via the pusher 113, so that the abrasive material M can be injected.

At this time, since the operator is manually swinging the swinging mechanism 7, the injection nozzle 31 stops swinging as necessary and concentrates on the desired position on the main girder upper surface 121. may be sprayed with the abrasive M.

Further, as shown in FIG. 8(b), when there is a stepped portion with the concrete floor slab F on the main girder upper surface 121, the direction of the surface treatment device 1 is appropriately changed, and the blast injection device 2 is opposed to the internal corner A1 formed to meet the cut surface of the concrete floor slab F. After that, the surface treatment apparatus 1 is moved backward until the anti-scattering housing 4 abuts the cut surface of the concrete floor slab F, so that the inner corner A1 can be surface-treated.

In this way, after removing the concrete residue left on the main girder upper surface 121 and the rust generated on the main girder 12 using the surface treatment device 1, if any remaining anchor bars are found, remove them with a disc sander. By using a power tool such as a grinder to remove the anchor bars, it is possible to efficiently perform surface preparation for the main girder upper surface 121 of the main girder 12 .

If the flange width is different for each main girder 12, the anti-scattering housing 4 may be changed to one having the abrasive injection space 47 corresponding to the flange width according to the procedure described above each time. For example, when the width of the main girder 12 is not uniform and varies in the axial direction, a scattering prevention housing 4 having an abrasive injection space 47 larger than the maximum width of the main girder 12 is adopted in advance to support this. By running with the auxiliary floor main body 153 of the floor forming device 15, there is no need to change the anti-scattering housing 4 during the work, and it is possible to greatly improve the work efficiency.

The surface treatment apparatus of the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, in the present embodiment, the interior of the anti-scattering housing 4 is divided into an abrasive injection space 47 and an abrasive recovery space 48, and the surface treatment apparatus 1 is used to prepare the upper surface 121 of the main girder. The case of performing However, it is not necessarily limited to this, and as shown in FIG.

In this case, instead of the auxiliary floor forming device 15, a protective wall forming device 16 may be provided for the main girder 12.

≪Protective Wall Forming Device≫
As shown in FIG. 9( a ), the protective wall forming device 16 is installed on both sides of the upper flange of the main girder 12 . 162 , a protective wall body 163 installed on the support plate 162 and projecting upward from the main girder upper surface 121 , and a reinforcing rib 164 .

The protective wall main body 163 is made of a strip-shaped steel plate extending in the axial direction of the main girder 12, and the casters 43 of the anti-scattering housing 4 remove concrete residue, anchor reinforcing bars, and rust generated on the main girder after the existing floor slab is removed. When traveling on the main girder upper surface 121 on which the etc. remain, an event of deviating from the main girder upper surface 121 can be prevented.

In addition, if the anti-scattering housing 4 is sized such that the outer surface of the cylindrical main body 41 abuts against the protective wall main body 163, the space for spraying the abrasive cleaning material can be maintained when the anti-scattering housing 4 is vertically moved. It is possible to prevent the abrasive material M ejected at 47 and the dust separated from the surface A to be treated from leaking outward.

Any of the fittings 161 and the support plate 162 used when installing the protective wall main body 163 on the main girder 12 may be adopted. Like 152, it uses a magnet and a flat plate. As a result, as shown in FIG. 9B, the protective wall forming device 16 can be rearranged in the forward direction in accordance with the movement of the surface treatment device 1, similarly to the auxiliary floor forming device 15. FIG.

A reinforcing rib 164 is provided on the lower surface of the support plate 162, and by joining the reinforcing rib 164 to the support plate 162, the protective wall main body 163 is parallel to the web of the main girder 12 and abuts against the side of the upper flange. can be placed in contact with each other.

The protective wall forming device 16 can be applied not only when the anti-scattering housing 4 is not provided with the abrasive material recovery space 48 but also when the abrasive material recovery space 48 is provided.

1 Surface Treatment Device 2 Blast Injection Device 3 Blast Hose 31 Injection Nozzle 4 Scattering Prevention Housing 41 Cylindrical Main Body 42 Top Plate 43 Caster 44 Seal Material 45 Lower End Opening 46 Inner Cylindrical Body 47 Abrasive Material Injection Space 48 Abrasive Material Recovery Space 49 Communicating portion 5 Recovery hose 6 Hose mounting device 61 Support shaft member 611 Horizontal support shaft 612 Bearing 62 Swing mechanism support base 7 Swing mechanism 71 Swing handle 72 Swing shaft 73 Crank 74 Hose holder 8 Support device 9 Support device body 91 Movable member 92 Telescopic shaft 921 Outer tube 922 Inner rod 93 Mounting area 10 Width adjusting device 101 Fully threaded bolt 102 Width adjusting handle 103 Support base 104 Moving body 105 Extruding rod 11 Traveling device 111 Body 112 Traveling wheel 113 Pusher 114 Counterweight 115 Counter Weight support base 12 Main girder 121 Main girder upper surface 122 Main girder side surface 13 Unmoving body 131 Hanging inner wall 132 Hanging outer wall 133 Elastic member 14 Moving body 141 Inner wall 142 Outer wall 143 Spacer 15 Auxiliary floor forming device 151 Mounting tool 152 Support plate 153 Auxiliary floor body 16 Protective Wall Forming Device 161 Mounting Tool 162 Supporting Plate 163 Protective Wall Body 164 Reinforcing Rib

F Concrete floor plate M Abrasive material

Claims (6)

A scattering prevention housing in which an injection nozzle for injecting the abrasive toward the surface to be treated and a recovery port for recovering the ejected abrasive are arranged inside, and the lower end opening faces the surface to be treated. and,
a supporting device main body for supporting the anti-scattering housing, and a supporting device having a width adjusting device capable of adjusting a mounting width when the anti-scattering housing is mounted on the supporting device main body;
a traveling device equipped with the support device,
The anti-scattering housing is
Via the support device, and arranged adjacent to the outside of the traveling device,
a size of an abrasive injection space formed inside the anti-scattering housing and in which the injection nozzle is arranged is variable,
The surface treatment apparatus, wherein the mounting width of the supporting device main body is adjusted via the width adjusting device each time the size of the abrasive injection space is changed. In the surface treatment apparatus according to claim 1,
the injection nozzle is arranged so as to be swingable in a direction orthogonal to the traveling direction of the traveling device;
A surface treatment apparatus according to claim 1, wherein said abrasive spray space has a variable width parallel to the swinging direction of said spray nozzle. In the surface treatment apparatus according to claim 1 or 2,
The inside of the scattering prevention housing is divided into the abrasive injection space and an abrasive recovery space surrounding the abrasive injection space,
The surface treatment apparatus according to claim 1, wherein the abrasive recovery space communicates with the abrasive injection space, and the recovery port is arranged. A scattering prevention housing in which an injection nozzle for injecting the abrasive toward the surface to be treated and a recovery port for recovering the ejected abrasive are arranged inside, and the lower end opening faces the surface to be treated. , a support device that supports the anti-scattering housing, and a traveling device equipped with the support device,
The anti-scattering housing is
Adjacent to the outside of the traveling device via the support device and arranged on the backward traveling side of the traveling device in the traveling direction ,
a size of an abrasive injection space formed inside the anti-scattering housing and in which the injection nozzle is arranged is variable,
A surface treatment apparatus, wherein the surface to be treated is an upper surface of a main girder of a bridge. An auxiliary floor forming apparatus used when using the surface treatment apparatus according to claim 4,
a mounting device detachably installed on the lower surface of the upper flange of the main girder;
a support plate fixed to the attachment;
an auxiliary floor main body installed on the support plate, projecting laterally from the side surface of the upper flange, and allowing the anti-scattering housing to travel;
An auxiliary bed forming apparatus comprising: A protective wall forming apparatus used when using the surface treatment apparatus according to claim 4,
a mounting device detachably installed on the lower surface of the upper flange of the main girder;
a support plate fixed to the attachment;
a protective wall body installed on the support plate, projecting upward from the side surface of the upper flange, and capable of coming into contact with the outer side surface of the anti-scattering housing;
A protective wall forming device comprising:

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