JPH08290084A - Spraying device - Google Patents

Abstract

PURPOSE: To provide a spraying device capable of preventing scattering of refractory covering material. CONSTITUTION: The opening 19 of a box body 12 is allowed to abut on the rear surface of the lower flange 20 of an H-type steel beam 18. A nozzle 46 performs oscillating motion and refractory covering material is sprayed. A front fin 26, a transverse cover 28 and cover material 30 are arranged in the peripheral edge of the opening 19. A clearance between the rear surface of the lower flange 20 of the H-type steel beam 18 and the opening 19 is surrounded. A suction machine is connected to a hole 36 of the lower end of the box body 12 and the inside of the box body is regulated to a state of negative pressure. Therefor, refractory covering material which does not stick on the rear surface of the lower flange 20 of the H-type steel beam 18 is not scattered in the air and is held in the box body 12. Since the refractory covering material in the box body 12 is sucked through the hole 36 by the suction machine, the refractory covering material is not collected in the box body 12 and spraying work is continuously performed for long time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying device for forming a fireproof coating film on steel frames such as beams and columns of buildings.

[0002]

2. Description of the Related Art In the conventional spraying work of a fireproof coating material, as shown in FIG. 8, a worker 72 rides on a moving carriage 70, grips a spraying nozzle 74, and sprays a building to be sprayed. The fireproof coating material 24 such as rock wool was sprayed on the H-shaped steel beam 18 and the like. In such a spraying work, a part of the sprayed fireproof coating material 24 bounces back to the worker 72, and the spraying nozzle 74 is heavy, resulting in heavy work in a poor working environment. In addition, since the fireproof coating material 24 that did not bounce off or detached from the H-shaped steel beam 18 and scattered was scattered in the air and scattered on the floor, another work was performed to clean the scattered fireproof coating material 24. The number of members 72 is required, and the scattered refractory coating material 24 has no choice but to be discarded, which causes a high cost. The working environment was also poor for this worker 72.

Further, since the spraying work is performed manually, it is unavoidable that the sprayed refractory coating film has unevenness or unevenness.

[0004]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention prevents the scattering of the fireproof coating material to improve the working environment,
Moreover, it is an object of the present invention to provide a spraying device capable of forming a uniform and even refractory coating film.

[0005]

A spraying device according to a first aspect of the present invention is provided with a box body, a part of which is opened toward a spraying surface of an object to be sprayed, and an opening edge of the box body. It is characterized in that it has an enclosing means for enclosing the periphery of the spraying surface of the sprayed object, and a spraying means provided in the box body for forming a fireproof coating film on the sprayed object. There is.

In the spraying device according to a second aspect of the present invention, suction means is connected to a hole provided at the bottom of the box body so that the inside of the box body is in a negative pressure state, and the surrounding means causes the spraying surface and An abutting member that abuts, a cover material that faces the fire-resistant coating film with a predetermined gap, and a peripheral edge of the spray surface that extends from an attachment portion of the abutting member to an end portion of the cover material. It is characterized by being composed of a horizontal cover that surrounds from both sides.

A spraying device according to a third aspect of the present invention is characterized in that the lateral cover is bent in a direction in which upper portions approach each other from a substantially middle portion and is supported by the box body so as to be deployable.

According to a fourth aspect of the present invention, there is provided a spraying device, wherein the spraying means is a rotating means arranged in the box body, and one end is attached to the rotating means and the other end is the spraying target object. From the nozzle, a link that swings in opposition to the spray surface of the nozzle, a nozzle holder provided at the other end of the link, a nozzle that is attached to the nozzle holder and sprays a fireproof coating material onto the spray target, And a diffusing means for diffusing the fireproof coating material to be sprayed.

According to a fifth aspect of the present invention, there is provided a spraying device, which is provided on the box body, with a moving means which moves at a constant speed along the object to be sprayed, a mounting table which is installed on the moving means and which can be moved up and down. It is characterized in that it has a detection means for detecting the deviation of the box body with respect to the blowing surface, and a correction means for correcting the deviation of the box body by a signal from the detection means.

According to a sixth aspect of the present invention, there is provided a spraying device including a box body which is opened toward a spraying surface of an object to be sprayed and which can be expanded and contracted vertically and horizontally in parallel with the spraying surface, and the box body. Expansion / contraction means for expanding / contracting in accordance with the size of the spraying surface, and expandable / contractible up / down corresponding to the expansion / contraction operation of the box body on the side part of the box body. A mounted cover, a driving unit that drives the cover to come into contact with and separate from the spraying surface, and a spraying unit that is provided in the box body and forms a fireproof coating film on the spray target. It has a suction means connected to a hole provided at the bottom of the box body to bring the box body into a negative pressure state, and a slide means for bringing the box body into and out of contact with the blowing surface. There is.

[0011]

According to the spraying apparatus of the present invention, a part of the box body is opened toward the spraying surface of the spraying object, and the spraying means forms a fireproof coating film on the spraying object in the box body. Means are provided. Enclosing means is provided at the opening edge of the box,
The gap between the spray surface and the opening surface is blocked.
As a result, the fireproof coating material that has not adhered to the spray surface is collected in the box body and does not scatter into the air.

In the spraying device of the second aspect, the contact member is in contact with the spray surface of the sprayed object before the spray of the fireproof coating material, and the fireproof coating material is sprayed. The cover material faces the fire-resistant coating film with a predetermined gap (3 to 5 cm) so as not to contact the fire-resistant coating film. Further, lateral covers are arranged on both sides of the contact member and the cover material, and surround the periphery of the spraying surface from both sides. As a result, the periphery of the spray surface is surrounded with a slight gap to prevent the fireproof coating material that has not adhered to the spray object from scattering in the air. Further, since the inside of the box is put into a negative pressure state by the suction means connected to the hole at the bottom of the box, the fireproof coating material that has not adhered to the object to be sprayed does not scatter to the outside of the box. .

On the other hand, since the refractory coating material that has fallen into the box body is sucked by the suction means through the hole, the refractory coating material does not accumulate, and even if the object to be sprayed is long, the spraying operation is continued for a long time. You can

In the spraying device of the third aspect, the upper side of the lateral cover is bent in the direction of approaching each other so as to cover the peripheral edge of the spraying surface, so that the inside of the box is likely to be in a negative pressure state. Further, since the lateral cover is supported so as to be deployable, if the lateral cover is unfolded when it is brought into contact with the spray surface, the lateral cover will not be an obstacle.

In the spraying device of the fourth aspect, the nozzle for spraying the fireproof coating material is attached to the nozzle holder provided at the other end of the link. Therefore, nozzles having different diameters can be used. The link is pivotally moved by the rotating means such that the nozzle faces the spray surface. Further, the refractory coating material jetted from the nozzle is diffused by the diffusing means. As a result, unlike the manual spraying work, the speed of the swing motion can be adjusted to be constant. Further, since the refractory coating material is not concentrated and is spread over a wide range, it is possible to spray with a uniform thickness.

In the spraying device of the fifth aspect, since the mounting table on which the box body is mounted is moved at a constant speed along the object to be sprayed by the moving means, it is possible to move along the longitudinal direction of the object to be sprayed. It is possible to obtain a fireproof coating film having a uniform thickness.
Further, since the box body is moved up and down by the mounting table, the fireproof coating material can be sprayed on the sprayed objects having different heights.

With the movement of the spraying device, the spraying device may be displaced from the object to be sprayed. This deviation is detected by the detection means. The correction means corrects the deviation by the signal from the detection means. As a result, the center of the swinging motion of the nozzle always coincides with the central axis of the object to be sprayed, so that the fire-resistant coating material can be sprayed evenly.

In the spraying device of the sixth aspect, the box body is expanded and contracted according to the size of the spraying surface by the expansion and contraction means and the sliding means. Further, the cover attached to the side portion of the box body expands and contracts in response to the expansion and contraction operation of the box body, and is brought into contact with and separated from the spray surface by the driving means. As a result, the box surrounds the spray surface regardless of the size of the spray target and the orientation of the spray surface, and prevents the fireproof coating material that did not adhere to the spray surface from scattering into the air. There is. Further, since the inside of the box is brought into a negative pressure state by the suction means, the fireproof coating material sprayed by the spraying means and not adhered to the spraying surface does not scatter to the outside.

[0019]

1 to 3 show a spraying device 10 which is a first embodiment of the present invention. The spraying device 10 according to the present embodiment includes a box body 12, a mount 14 on which the box body 12 is mounted,
It is provided with a mounting table 16 on which the pedestal 14 is mounted and which is moved up and down, and a moving carriage 22 which moves the mounting table 16 along the H-shaped steel beam 18 which is an object to be sprayed.

An opening 19 is formed on the upper surface of the box body 12. A front fin 26 as a surrounding means, a lateral cover 28, and a cover material 30 are attached to the periphery of the opening 19.

Front fin 2 having a surface of elastic material such as sponge
6 is an opening 19 which is located in front of the moving direction of the spraying device 10.
From the edge of the H-shaped steel beam 18 to the front, the H-shaped steel beam 18 horizontally extends so as to abut the lower surface of the lower flange 20.

The lateral cover 28 extends from the front edge of the opening 19, that is, the portion where the front fin 26 is attached, along the side edge of the opening 19 to the rear end of the cover material 30. The horizontal cover 28 is erected vertically upward and bent from a substantially middle portion toward the web 21 of the H-shaped steel beam 18 to reach above the lower flange 20 of the H-shaped steel beam 18. The lower ends of the lateral covers 28 are attached to the box body 12 by the hinges 33, and the lateral covers 28 can be deployed in directions away from each other. Further, the vertically erected state is maintained by a stopper (not shown).

An ultrasonic sensor 29 is provided on the upper end of the lateral cover 28 as a detecting means for emitting ultrasonic waves to the web 21 to detect a change in the distance between the H-shaped steel beam 18 and the web 21.
Is provided. As will be described later, the detected change in distance is transmitted to the control device 57.

The detecting means is not limited to the ultrasonic sensor 29, but may be an infrared sensor or the like as long as it can detect a change in the distance between the H-shaped steel beam 18 and the web 21.

The cover material 30 extends rearward from the edge of the opening 19 which is rearward in the moving direction of the spraying device 10. The cover material 30 has a flat plate portion horizontally projected so as to form a slight gap (3 to 5 cm) with the fireproof coating film 32 formed on the lower surface of the lower flange 20 of the H-shaped steel beam 18, and the flat plate portion of the flat plate portion. It is vertically provided from the side end and includes a side surface portion that covers a side of the lower flange 20 of the H-shaped steel beam 18.

The bottom of the box 12 has a funnel-shaped hopper 34.
Has become. A hole 36 is formed at the lower end of the hopper 34. With this hopper 34, the H-shaped steel beam 1
The refractory coating material 24 not adhered to the lower flange 20 of the No. 8 is collected in the hole 36.

A duct 38 is connected to the hole 36,
A suction device (not shown) is attached to the duct 38. With this suction machine, the box 1
The inside of 2 is made into a negative pressure state, and the fireproof coating material 24 is the box body 12.
Do not scatter outside. Further, since the refractory coating material 24 collected in the holes 36 is sucked by this suction device, it does not accumulate in the hopper 34.

Inside the box body 12, there are provided a link 40, a motor 42, a nozzle holder 44 as a spraying means, and a vibrator 45 as a diffusing means.

One end of the link 40 is connected to the rotating shaft of the motor 42, and the other end is extended into the box 12.

The motor 42 repeats normal and reverse rotation at a set rotation angle. As a result, the link 40 pivots about the one end and the other end in the direction of arrow c in FIG.

A nozzle holder 44 is provided at the other end of the link 40.
The nozzle holder 44 is provided with an H-shaped steel beam 1
A nozzle 46 for spraying the fireproof coating material 24 is attached to the lower flange 20 of the No. 8. A flexible hose 48 for supplying the fireproof coating material 24 is attached to the nozzle 46. The flexible hose 48 penetrates the side wall of the box 12 and is connected to an external fireproof coating supply device (not shown). There is.

The nozzle holder 44 is partially provided with a notch, and the notch is formed in a clip shape that can be expanded and contracted, and various ready-made nozzles can be attached. As a result, the fireproof coating material 2
The optimum nozzle can be selected and replaced according to the discharge amount of No. 4.

Further, since the nozzle 46 is vibrated by the vibrator 45, and the refractory coating material 24 ejected from the nozzle 46 is diffused by this, the refractory coating material 24 is uniformly sprayed onto the lower flange 20 of the H-shaped steel beam 18. be able to.

At the bottom of the box body 12, rollers 50 constituting correction means are attached to the four corners.

The roller 50 is mounted on the upper plate 14a of the gantry 14 constituted by a box-shaped frame so as to rotate. Therefore, the box body 12 is attached to the mount 14 as shown in FIG.
Can be moved in the direction of arrow b. Upper plate 14
A stopper 52 is provided at the end of a to prevent the roller 50 from falling off the end of the upper plate 14a.

A hydraulic jack 51, which constitutes a correcting means, and a control device 57 are fixed to the upper part of the pedestal 14.
Further, one end of the piston 60 of the hydraulic jack 51 is attached to the side surface of the box body 12.

With the movement of the moving carriage 22, the H-shaped steel beam 1
When the horizontal distance between the web 21 of 8 and the box 12 changes, the ultrasonic sensor 29 detects the change and transmits the signal to the control device 57. Based on this signal, the control device 5
7 controls the hydraulic jack 51 to control the center of the box 12 and H
The piston 60 is expanded and contracted so as to correct the deviation from the central axis of the shaped steel beam 18. As a result, as shown in FIG.
Even if there is a gap between the moving carriage 22 and the H-shaped steel beam 18,
The center of the box body 12 and the central axis of the H-shaped steel beam 18 always coincide with each other.

A hopper 34 is housed in the hollow portion of the frame 14. Here, the width of the opening of the gantry 14 (the length in the arrow b direction in FIG. 1) is formed longer than the width of the hopper 34 (the length in the arrow b direction in FIG. 1), and the box 12 is moved in the arrow b direction. It is movable.

A mounting table 16 on which the frame 14 is mounted
Can be moved up and down by a jack 17 to adjust its height. As a result, even for H-shaped steel beams 18 having different mounting heights, the lower flange 20 of the H-shaped steel beam 18 is brought into face-to-face contact with the opening 19 of the box body 12, and the front fin 26, the lateral cover 28, and the cover material 30 form a gap. Can be surrounded.

The movable carriage 22 has drive wheels 54 and traveling wheels 5.
3 is attached. The drive wheels 54 are the traveling device 13
The movable carriage 22 can be moved at a constant speed.

Next, a spraying work procedure by the spraying device 10 according to this embodiment will be described. First, to the extent that the tip of the lateral cover 28 does not contact the lower flange 20 of the H-shaped steel beam 18,
Adjust the height of the mounting table 16 and then move the carriage 22.
Is moved below the H-shaped steel beam 18, and the center axis of the H-shaped steel beam 18 and the center of the box body 12 along the moving direction of the spraying device (hereinafter simply referred to as the “center of the box body 12”) are aligned. .

Here, the horizontal fin 28 is unfolded and the mounting table 16 is raised. As a result, the tip of the lateral cover 28 does not come into contact with the lower flange 20 of the H-shaped steel beam 18 to prevent the mounting table 16 from being lifted, and the opening 19 of the box body 12 is formed in the lower flange 20 of the H-shaped steel beam 18. Can be interviewed.

The front fin 26 is the lower flange 2 of the H-shaped steel beam 18.
When it comes into close contact with the lower surface of 0, the raising of the mounting table 16 is stopped. Here, the lateral cover 28 is set up and fixed by a stopper. The lateral cover 28 surrounds both ends in the width direction of the lower flange 20 of the H-shaped steel beam 18 from outside and from above.
Further, between the cover material 30 and the lower flange 20 of the H-shaped steel beam 18, there is a gap slightly wider than the thickness of the fireproof coating film 32 formed by spraying the fireproof coating material 24. In this way, the peripheral edge of the lower surface of the lower flange 20 of the H-shaped steel beam 18 is surrounded.

Here, the motor 42 and the vibrator 45 are driven, and the moving carriage 22 is moved. At the same time, the fireproof coating material 24 is ejected from the nozzle 46.

With this series of movements, the nozzle 46 swings and vibrates slightly and sprays a uniform amount of the fireproof coating material 24 per unit area onto the lower flange 20 of the H-shaped steel beam 18. You can As compared with the case where the operator operates the nozzle to spray, it is possible to spray with a more uniform thickness. Also, link 4
The thickness to be sprayed can be freely adjusted by changing the speed of the swinging motion of 0 and the moving speed of the moving carriage 22.

The circumference of the box 12 is surrounded by the front fin 26, the lateral cover 28 and the cover material 30, and the inside of the box 12 is kept in a negative pressure state by the suction means connected to the hole 36. There is. As a result, even if there is a gap between the spray surface and the opening 19, the fireproof coating material 24 that has not adhered to the lower flange 20 of the H-shaped steel beam 18 does not fly into the air. Further, since the fireproof coating material 24 is not sucked through the holes 36 and the fireproof coating material 24 does not accumulate in the box body 12, it is possible to use the spraying device 10 for a long time.

Strictly speaking, the movement of the moving carriage 22 is H.
H is not parallel to the central axis of the shaped steel beam 18
It deviates from the central axis of the shaped steel beam 18 by several cm. But,
This deviation is detected by the ultrasonic sensor 29, and the signal from the ultrasonic sensor 29 is transmitted to the control device 57. The control device 57 drives the hydraulic jack 51 to expand and contract the piston 60, whereby the deviation is corrected and the center of the box 12 and the central axis of the H-shaped steel beam 18 are always aligned with each other, as shown in FIG. be able to.

By moving the box body 12, the roller 5
Even when 0 reaches the side end of the gantry 14, the stopper 52
This prevents the roller 50 from falling off. The stopper 52 is provided with a sensor that detects that the roller 50 has come into contact with the stopper 52, whereby the movement of the moving carriage 22 is automatically stopped, and further, the movement direction of the moving carriage 22 is corrected. Is also possible.

In this embodiment, the case 12 is placed on the pedestal 14, but the placing table 16 is provided with an opening in which the hopper 34 of the box 12 is directly accommodated. You may do it.

Further, as the front fin 26, it is also possible to employ a roller or the like which comes into contact with the lower surface of the lower flange 20 of the H-shaped steel beam 18 to rotate.

Further, as shown in FIG. 6, instead of the vibrator 45, a nozzle 150 having a trumpet-shaped tip may be used.

Next, a spraying device 100 according to the second embodiment of the present invention will be described. As shown in FIG. 5, in the spraying device 100 according to the second embodiment, the side surface of the H-shaped steel beam 18 is surrounded, and the fire-resistant coating material 24 can be sprayed onto the web 21 as well.

The spraying device 100 is provided with an upper slide cover 102 and a lower slide cover 104 which are overlapped with each other and relatively slide vertically. The upper slide cover 102 is formed in a rectangular parallelepiped box shape, and the side surface and the bottom surface facing the web 21 are opened.

On the other hand, the lower part of the upper slide cover 102 is
The lower side of the side surface 104A of the left and right lower slide covers 104 overlaps with the lower slide cover 104, and the lower side of the side surface 104A is slidable to the left and right. Further, the lower slide cover 104 opens along the edge of the side surface 104A,
Face the web 21 and the lower flange 20. This side 10
An L-shaped bracket 110 is provided at the edge of 4A, and the tips thereof are slidably overlapped. The bracket 110 projects to the outside of the lower slide cover 104 and makes it easy for the insides of the upper slide cover 102 and the lower slide cover 104 surrounding the web 21 to be in a negative pressure state.

A slit 106 is formed on the side surface of the upper slide cover 102. This slit 1
The horizontal portion 120A of the upper shielding plate 120 is slidably inserted into the upper portion 06 so that the upper shielding plate 120 can be brought into contact with and separated from the web 21. A slit (not shown) is also formed on the side surface of the lower slide cover 104. The horizontal portion 122A of the lower shield plate 122 is slidably inserted into this slit, and the lower shield plate 122 is slidable with respect to the web 21. When the lower shield plate 122 and the upper shield plate 120 slide with respect to the web 21, a gap between the upper shield plate 120 and the upper slide cover 102,
The gap between the lower shield plate 122 and the lower slide cover 104 is shielded by the side surface 120C of the upper shield plate 120 and the side surface 122C of the lower shield plate 122.

On the other hand, the vertical portion 120B of the upper shield plate 120 and the vertical portion 122B of the lower shield plate 122 are overlapped with each other by a joint 128 so as to be slidable in the vertical direction, and are driven in association with the movement of the upper slide cover 102. It is supposed to do.

Further, one end of a cylinder 112 is fixed to the side surface 104A of the left lower slide cover 104, and one end of a piston 114 is fixed to the side surface 104A of the right lower slide cover 104. Lower slide cover 10
4 is mounted on the support 140. A rail 150 is provided on the support base 140 in the expansion / contraction direction of the lower slide cover 104. A groove (not shown) that engages with the rail 150 is formed on the bottom surface of the lower slide cover 104. By expanding and contracting the piston 114, this rail 1
The left and right lower slide covers 104 slide along 50 and relatively move.

Further, one end of a cylinder 116 is fixed to the lower slide cover 104, and one end of a piston 118 is fixed to the upper slide cover 102. Piston 1
The expansion and contraction of 18 allows the upper slide cover 102 to slide vertically with respect to the lower slide cover 104.

One end of a cylinder 130 is fixed to the upper slide cover 102 and the lower slide cover 104, and one end of a piston 132 is fixed to the vertical portion 122B of the upper shield plate 120 and the lower shield plate 122. This piston 1
By extending and contracting 32, the upper shield plate 120 and the lower shield plate 12
2 can slide on and off the web 21.

A hole (not shown) is provided on the bottom surface of the lower slide cover 104, and one end of the duct 134 is connected to the hole. The other end of the duct 134 is connected to a suction device (not shown).

Inside the upper slide cover 102, there is provided a nozzle 136 facing the web 21 and spraying the fireproof coating material 24 onto the web 21 while swinging in the direction of arrow d.

A flexible hose 138 is attached through the side wall of the upper slide cover 102, and supplies the fireproof coating material 24 to the nozzle 136.

Rollers 142 are attached to the four corners of the support stand 140, and the rollers 142 run on the upper plate 144A of the stand 144. A stopper 146 that prevents the roller 142 from falling off is provided at the end of the upper plate 144A.

The pedestal 114 is mounted on the mounting table 16 of the movable carriage 22 (see FIG. 1), as in the first embodiment.

Next, the spraying device 100 of the second embodiment.
The spraying work procedure will be described. First, the piston 114
And the piston 132 is contracted, the distance between the upper and lower shield plates 120 and 122 on the left and right is H-shaped steel 18.
It should be longer than the width of the lower flange 20.

Next, the moving carriage 22 is moved below the H-shaped steel beam 18 to raise the mounting table 16, and the bracket 11
The horizontal portion of 0 forms a slight gap with the lower surface of the lower flange 20 of the H-shaped steel beam 18. At the same time, the piston 118
Are extended to match the upper surface of the upper slide cover 102 with the upper surface of the upper flange 23 of the H-shaped steel beam 18.

Next, the piston 114 is contracted so that the distance between the vertical portions of the left and right brackets 110 is slightly longer than the width of the lower surface of the lower flange 20 of the H-shaped steel beam 18. Then, the piston 132 is extended and the upper shielding plate 12
0 vertical portion 120B and lower shield plate 122 vertical portion 122
It is made close enough to cause a slight gap between B and the web 21.

As described above, the spraying device 10 according to the second embodiment.
The installation of 0 ends. While the nozzle 46 is swung in the direction of the arrow d, the fireproof coating material 24 is ejected to move the moving carriage 22.
By moving, the fire-resistant coating material 24 can be sprayed onto the web 21 of the H-shaped steel beam 18.

The lower surface of the upper flange 23 of the H-shaped steel beam 18, the upper surface of the web 21 and the upper surface of the lower flange 20 are surrounded by the upper slide cover 102, the lower slide cover 104, the upper shield plate 120 and the lower shield plate 122. The lower surface of the lower flange 20 of 18 is surrounded by the bracket 110. When the air in the enclosed space is sucked by the suction device through the duct 134, the inside is brought into a negative pressure state, and the H-shaped steel beam 1
The refractory coating material 24 that did not adhere to 8 does not scatter to the outside.

In the second embodiment, as in the first embodiment,
An ultrasonic sensor 29 that detects a change in horizontal distance from the upper flange 23 is provided on the upper slide cover 102, and
The hydraulic jack 51 and the control device 57 may be attached to the gantry 114, and the piston 60 may be expanded and contracted to correct the deviation between the H-shaped steel beam 18 and the moving carriage 22. (Refer to FIG. 1) FIG. 7 shows a spraying device 200 of a modified example of the second embodiment.

In this spraying device 200, unlike the spraying device 100 of the second embodiment, upper slide cover 202 and lower slide cover 204 are provided with those corresponding to the upper shield plate 120 and the lower shield plate 122. Instead, instead of this, the extending portion 220 and the extending portion 222 extending toward the web 21 are formed on the side surfaces of the upper slide cover 202 and the lower slide cover 204. Extension part 2
A notch 220 </ b> A facing the lower surface of the upper flange 23 of the H-shaped steel beam 18 is formed at the upper end of 20, and the extending portion 222 is formed.
The slit 222 into which the lower flange 22 enters at the lower end of the
A is formed.

A roller 250 is attached to the bottom surface of the lower slide cover 204 and placed on the pedestal 14 as in the first embodiment. As a result, the upper slide cover 202 and the lower slide cover 204 can slide left and right as the piston 114 expands and contracts.

The other points than the above are the same as those of the spraying apparatus 100 of the second embodiment. Next, this spraying device 20
A procedure of spraying the fireproof coating material 24 using 0 will be described.

First, the piston 114 is extended so that the intervals between the left and right extending portions 220 and the extending portions 222 are longer than the width of the lower flange 20.

Next, the movable carriage is moved below the H-shaped steel beam 18 to raise the mounting table so that the height of the slit 222A matches the height of the lower flange 22. Further, the piston 118 is extended so that the notch 220A of the upper slide cover 202 and the lower surface of the upper flange 23 face each other with a gap.

Next, the piston 114 is contracted so that the protrusion 2
There should be a slight gap between the tips of 20, 222 and the web 21. At this time, the lower surface of the upper flange 23 faces the notch 220A, and the lower flange 22 has the slit 22.
Enter 2A.

This completes the installation of the spraying device 200.
As in the case of the second embodiment, the fireproof coating material is jetted while the nozzle (not shown) is swung, and the movable carriage is moved, whereby the fireproof coating material 22 can be sprayed on the web 21.

The lower surface of the upper flange 23 is formed by the notch 220A, the web 21 is formed by the tips of the extending portions 220, 222, and the upper and lower surfaces of the lower flange 22 are formed by the slit 222A.
Since the air in the enclosed space is sucked by a suction device through a duct (not shown) as in the first embodiment, the inside is brought into a negative pressure state and the H-shaped steel beam 1 is surrounded.
The refractory coating material 24 that did not adhere to 8 does not scatter to the outside.

Next, an experimental example in which the spraying device 10 according to the first embodiment of the present invention is used to actually spray the fireproof coating material 24 will be described.

As conditions for the experiment, the traveling speed of the moving carriage 22 is 4.5 m / min, the spray width is 300 mm, the swing cycle of the nozzle 46 is 0.6 times / sec, and the vibration cycle of the vibrator 45 is 50 times /. sec, the blowout amount of the fireproof coating material 24 was 4.5 L / min of milk and 3 kg / min of cotton. The mixing ratio of the fireproof coating material 24 was 60 by weight for rock wool, 40 for cement, and 80 for water.

As a result, the refractory coating material 24 hardly scattered in the air, and an extremely good working environment was obtained.

This is because the front fin 26, the lateral cover 28, and the cover material 30 surround the gap between the opening 19 and the lower surface of the lower flange 20, and the inside of the box body 12 is brought to a negative pressure state by the suction device. Fireproof coating material 24 that did not adhere to the H-shaped steel beam 18
Is not scattered from the box body 12 to the outside.

Further, the surface of the formed fire-resistant coating film 32 has less unevenness as compared with the conventional manual spraying,
The thickness was uniform. This is because the spraying device 10 moves at a constant speed, and the nozzle 46 also swings at a constant cycle.
This is because the effect of diffused and squirting appears.

Further, it was understood from the observation situation that the thickness of the fireproof coating film 32 formed can be freely changed by changing the period of the swinging motion of the nozzle 46 and the moving speed of the moving carriage 22. .

[0085]

Since the present invention has the above-mentioned structure, it is possible to prevent the refractory coating material from scattering and improve the working environment, and to form a uniform and even refractory coating film.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a spraying device according to a first embodiment of the present invention.

FIG. 2 is a side view of the spraying device according to the first embodiment of the present invention.

FIG. 3 is a front view of the spraying device according to the first embodiment of the present invention.

FIG. 4 is a front view showing a state when a deviation occurs between the box body and the mount in the spraying device according to the first embodiment of the present invention.

FIG. 5 is a perspective view of a spraying device according to a second embodiment of the present invention.

FIG. 6 is a sectional view of a modified example of the diffusing means of the present invention.

FIG. 7 is a front view of a spraying device according to a modification of the second embodiment of the present invention.

FIG. 8 is a front view showing a conventional spraying operation.

[Explanation of symbols]

 10 spraying device 12 box body 14 mount 16 mounting table 18 H-shaped steel beam (object to be sprayed) 22 moving carriage (moving means) 24 fireproof coating material 26 front fin (surrounding means) 28 side cover (surrounding means) 29 super Sound wave sensor (detection means) 30 Cover material (enveloping means) 34 Hopper 36 Hole 40 Link (spraying means) 42 Motor (rotating means) 44 Nozzle holder (spraying means) 45 Vibrator (diffusing means) 46 Nozzle (spraying) Means) 48 Flexible hose (blasting means) 50 Roller (correction means) 51 Jack (correction means) 102 Upper slide cover (box) 104 Lower slide cover (box) 112 Cylinder (expansion / expansion means) 114 Piston (expansion / expansion means) 116 Cylinder (expansion / contraction means) 118 Piston (expansion / contraction means) 120 Upper shielding plate (cover ) 122 lower shield plate (cover) 130 cylinder (driving means) 132 piston (driving means) 136 nozzle (blowing means) 140 support base (slide means)

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasuaki Uchida 2-5-5 Tsurumi Chuo, Tsurumi-ku, Yokohama-shi, Kanagawa Asc Inc. (72) Inventor Tsutomu Horiguchi 2-chome, Tsurumi-chu, Tsurumi-ku, Yokohama-shi, Kanagawa No. 5 Asc Inc. (72) Inventor Atsushi Otokuni 2-5-5 Tsurumi Chuo, Tsurumi-ku, Yokohama-shi Kanagawa Asc Inc.

Claims (6)

[Claims] 1. A box body, a part of which is opened toward a blowing surface of an object to be sprayed, and a box which is arranged at an opening edge of the box body and surrounds a peripheral edge of the blowing surface of the object to be sprayed. Sieving means,
And a spraying unit that is provided in the box body and forms a fireproof coating film on the spray target object. 2. A suction member is connected to a hole provided at a bottom portion of the box body so that the inside of the box body is in a negative pressure state, and the enclosing means is in contact with the spraying surface, and the fireproof member. A cover member that faces the coating film with a predetermined gap, and a horizontal cover that extends from the attachment portion of the contact member to the end of the cover member and surrounds the periphery of the spraying surface from both sides. The spraying device according to claim 1, wherein the spraying device is configured. 3. The spraying device according to claim 2, wherein the lateral cover is bent in a direction in which upper portions approach each other from a substantially middle portion and is supported by the box body so as to be deployable. 4. The spraying means comprises a rotating means arranged in the box body, and a neck with one end attached to the rotating means and the other end facing the spraying surface of the sprayed object. A link that swings, a nozzle holder provided at the other end of the link, a nozzle that is attached to the nozzle holder and sprays a fire-resistant coating material onto a spray target, and a fire-resistant coating material that is sprayed from the nozzle is diffused. The spraying device according to any one of claims 1 to 3, wherein the spraying device comprises a diffusing means. 5. A moving unit that moves along the object to be sprayed at a constant speed, a mounting table installed on the moving unit and capable of moving up and down, and a displacement of the box body with respect to a spray surface provided on the box body. The spraying device according to any one of claims 1 to 4, further comprising: a detection unit configured to detect an error, and a correction unit configured to correct the shift of the box body by a signal from the detection unit. 6. A box body which is opened toward a spraying surface of an object to be sprayed and which can be expanded and contracted vertically and horizontally in parallel with the spraying surface, and the box body is adjusted to the size of the spraying surface. An expansion / contraction means for expanding / contracting, a cover attachable to / separated from the spray surface and vertically expandable / contractible in correspondence with the expansion / contraction operation of the box body, and attached to the side portion of the box body; Drive means for driving and bringing the spray surface into and out of contact with the spray surface, spray means for forming a fireproof coating film on the spray object provided in the box body, and provided at the bottom of the box body A spraying device comprising: a suction means connected to the hole to bring the box body into a negative pressure state; and a slide means for bringing the box body into contact with and separating from the spraying surface.