JP3258173B2 - Spraying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray device for forming a fire-resistant coating layer on a steel frame such as a beam or a column of a building.

[0002]

2. Description of the Related Art In a conventional refractory spraying operation, an operator rides on a movable trolley, grips a spray nozzle, and sprays a refractory material such as rock wool on steel beams such as beams and columns of a building. I was However, refractory materials could bounce back to workers,
Heavy spray nozzles led to heavy labor in poor working environments.

[0003] For this reason, some attempts have been made to mechanize the spraying operation of the refractory material. All of these proposals aim to be fully automated, with a robotic arm that is numerically controlled by remote control on an aerial work platform, and a spray nozzle attached to the wrist of this robotic arm. General.

However, such a remote control type spraying apparatus has a complicated control mechanism, and it takes time to position the spraying direction and the spraying height of the spraying nozzle.
The efficiency of spraying work was lower than that of human power. In addition, in this method, since the control mechanism is complicated, it is not possible to mount a plurality of spray nozzles, and the swing of the spray nozzle causes a problem in that the hose for supplying the refractory material has a torsional durability. was there.

On the other hand, there is no commercially available aerial work vehicle capable of traveling at a constant low speed, and it is necessary to order an aerial work vehicle of a special specification, thereby increasing the manufacturing cost of the entire spraying device. Was.

[0006]

In view of this fact, the present invention takes into account the fact that the spraying operation can be performed by an automatic mechanism and the positioning of the spray nozzle can be performed by a manual mechanism. It is an object of the present invention to provide a spraying device that can use an aerial work vehicle as it is.

[0007]

According to a first aspect of the present invention, there is provided a spraying device, comprising: a moving means for moving a gantry at a constant speed along an object to be sprayed; An arm that pivots and expands and contracts in the axial direction; a pivot table provided at the tip of the arm that pivots around a first axis and can be fixed at any position; and a pivot table attached to the pivot table and orthogonal to the first axis. A mounting bracket that rotates about two axes and can be fixed at an arbitrary position, spraying means rotatably supported by the mounting bracket, a rotary joint connecting the spraying means to a hose, and the mounting bracket And link means for converting the rotational force of the rotating device provided to the camera into the swinging motion of the spraying means.

According to a second aspect of the present invention, in the spraying device, the moving means is provided on a moving vehicle and driven at a constant low speed; a driving wheel for steering the driving wheels; Clamping means for clamping a side surface of a work carriage supporting the gantry, which is attached to be able to expand and contract in a direction perpendicular to the traveling direction, and lift means disposed between the clamping means and capable of lifting the rear side of the gantry, It is characterized by comprising.

[0009]

In the spraying apparatus according to the first aspect, the worker gets on the gantry, raises and lowers the arm, turns the arm about a vertical line, or expands and contracts in the axial direction to discharge the discharge port of the spraying means to the object to be sprayed. Are set to face each other. Next, the turning table and the mounting bracket are finely adjusted manually, and the discharge port is set so as to more accurately face the object to be sprayed.

As described above, since the initial positioning is performed by the manual operation by the operator, the discharge port of the spraying means can be accurately positioned in a short time.

Next, the swing range of the blowing means is set corresponding to the blowing range. In the spraying means, the rotational force of the rotating device is remotely transmitted by the link means and performs a swinging motion, but at this time, the spraying means rotates relative to the hose for pumping the refractory material by the rotary fitting, so that The disadvantage that the hose is twisted does not occur. Further, since the rotational force of the rotating device is remotely transmitted by the link means, the degree of freedom in mounting the spraying means is increased.

Further, the use of the link means eliminates the need for rotating and rotating the rotating device forward and backward to swing the spraying means as in the conventional spraying apparatus, so that the drive mechanism can be simplified. .

Next, the gantry is moved along the object to be sprayed by the moving means, and the spraying means performs a swing motion to automatically apply the refractory material to the area to be sprayed. As described above, since the refractory material is automatically sprayed by the swinging motion of the spraying means, the variation in the discharge amount is corrected, and a high-quality sprayed film can be obtained. The spraying thickness can be adjusted by adjusting the moving speed of the gantry or the discharge amount of the refractory material, and by rotating the mounting bracket about the second axis, not only the vertical surface but also the upper surface and the lower surface. It is also possible to spray refractory material.

[0014] In the spraying device according to the second aspect, the holding means attached to the movable trolley holds the side surface of the working trolley that expands and contracts and supports the gantry. Also, on the back side of the work cart,
It is lifted by lifting means. That is, not only lift the rear side of the work cart, but also restrain the side of the gantry by the holding means, when driving the drive wheels to move the work cart backward and forward, the work cart does not rattle. Steering by the steering means can be performed accurately.

Further, since the driving wheels are driven at a constant low speed, a commercially available work vehicle which cannot run at a constant speed can be used as it is, and the manufacturing cost can be reduced.

[0016]

As shown in FIG. 1, a spraying apparatus 10 according to the present embodiment includes a work carriage 22 on which a support 20 for supporting a gantry 18 is erected. The work cart 22 has running wheels 42 at the front and rear. In addition, a lift hook 48 projecting forward from a movable cart 46 as a moving means can be inserted into the lower surface on the rear side of the work cart 22. On both sides of the lift hook 48, a pair of arms 50 extend obliquely toward the floor. A rack (not shown) and a telescopic frame 52 that expands and contracts by a pinion mechanism are provided at the end of the arm 50. A fork 54 having a running wheel 43 is attached to the end of the telescopic frame 52 so as to be orthogonal.

A shaft is supported on the movable carriage 46, and drive wheels 56 are attached to both ends of the shaft. A pulley 58 is provided on the outer surface of the drive wheel 56.
Is fixed. A belt 60 is wound around the pulley 58 and a pulley 62 attached to a rotation shaft of a motor 64, and the rotation of the motor 64 allows the drive wheel 56 to rotate forward and reverse. Further, the motor 64 rotates at a constant speed.

Further, a jack handle 66 is provided on the movable trolley 46.
Is tilted backward, so that the lift hook 48 is raised. The jack handle 66 is provided with a steering handle 68. By operating the handle 68, the drive wheel 56 can be steered.

A control box 70 is provided on the movable carriage 46. The control box 70 controls the beam 12 when the movable cart 46 is automatically steered.
It has a built-in microcomputer programmed to run at a constant speed in the direction of extension. Further, the mobile trolley 46
Control box 70 so that remote control of
Is connected to a remote controller 72. This remote control 7
2 is provided with a stop button for emergency stop.

On the other hand, the column 20 is guided by the guide frame 26, and is expanded and contracted by a hydraulic cylinder (not shown).
8 is raised and lowered. The outer periphery of the gantry 18 is surrounded by a fall prevention fence 28, and the safety of a worker who gets on the gantry 18 is ensured.

A turning device 40 constituting the arm 16 is attached to an end of the gantry 18. This turning device 4
An arm column 36 is erected from zero. This arm pillar 3
A bracket 38 is attached to the upper end of 6. The rear end of the cylinder portion 34A of the hydraulic cylinder 34 is supported by the bracket 38 so as to be rotatable in the vertical direction. The lower end of the arm column 36 has a hydraulic cylinder 3
The rear end of the zero cylinder portion 30A is rotatably supported in the vertical direction. The rod 30 of this hydraulic cylinder 30
The distal end of B rotatably supports the cylinder portion 34A. Due to the expansion and contraction of the rod 30B, the hydraulic cylinder 34 moves up and down.

The swing device 40 and the hydraulic cylinder 3
4 and the drive mechanism of the hydraulic cylinder 30 are accommodated in an operation box 32 arranged on the gantry 18, and the operation of the operation lever 28 causes the arm 16 to pivot, extend and retract, and undulate. The gantry 18 is provided with a distance sensor (not shown) for detecting the distance from the beam 12, and is connected to a control device. When the position of the spray nozzle 76 is manually set and the automatic spraying state is set, the control device turns, expands and contracts, or undulates the arm 16 based on a signal from the distance sensor, and the spray nozzle 76 The distance between the beam and the beam 12 is controlled to be maintained within a certain range.

On the other hand, as shown in FIG. 2, a flange 78 is fixed to the tip of the rod 34B of the hydraulic cylinder 34, and a plate 80 is attached to the flange 78. A disk 82 is attached to the plate 80 so that the arm 16 can be maintained in a substantially horizontal state with the arm 16 raised and lowered. A turning table 84 is attached to the disk 82 so as to be able to turn via a bearing (not shown). A circular hole 86 penetrates through the outer periphery of the turning table 84 and the disc 82, and by inserting a locking pin 88 into the circular hole 86, the turning table 84 can be locked at a predetermined position. Has become.

A pair of brackets 90 stand upright from the upper surface of the swivel table 84. A shaft 94 is rotatably wrapped around the bracket 90 in a direction orthogonal to the rotation axis of the turntable 84. This shaft 9
A pair of leg plates 96 projecting from an elliptical mounting flange 92 are connected to both ends of the mounting plate 4 so that the mounting flange 92 can rotate around a shaft 94. Also,
A hand lever 98 is attached to an end of the shaft 94, and the shaft 94 can be rotated and locked at a desired position by a clutch mechanism (not shown).

On the other hand, a hydraulic motor 100 is mounted on an end of the mounting flange 92. This hydraulic motor 10
The zero rotation shaft penetrates the mounting flange 92, and the cam 104 is connected to the tip thereof. A link 108 is rotatably connected to the outer periphery of the cam 104. The other end of the link 108 is rotatably connected to the outer periphery of the cam 106. The cam 106 is mounted on the mounting flange 9.
2. A base end portion 74A of a spraying tube 74 that is rotatably supported in the second direction.
Has been fixed to. Thus, the rotational force of the hydraulic motor 100 is converted into the swinging motion of the spray tube 74.

As described above, by providing the hydraulic motor 100 as a drive source for the swinging motion of the spray pipe 74 at a distance, the degree of freedom in mounting the spray pipe 74 is increased. In addition, the reciprocating motion of the link 108 causes the spray nozzle 74 to perform a swing motion only by rotating the hydraulic motor 100 in one direction, so that the driving mechanism is simplified.

On the other hand, the spray tube 74 extends from the base end portion 74A in parallel with the surface of the mounting flange 92, and further has a spray nozzle 76 attached to the bent distal end.
An air hose 114 is connected to the spray nozzle 76, and the refractory material 14 is compressed (see FIG. 1) using compressed air.
To the beam 12.

The base end 74 A of the spray pipe 74 is connected to a rotary pipe joint 110. This rotary fitting 11
0 is connected to the hose 102 through which the refractory material 14 is fed through a coupler 112. This coupler 112
Is provided with an operation lever 118, and the hose 10
2 can be fastened to the coupler 116. At the joint between the coupler 116 and the rotary pipe joint 110, a packing 111 for preventing water leakage is attached.

As described above, since the spray tube 74 is connected to the hose 102 via the rotary fitting 110, the hose nozzle swings (rotates around the axis of the spray tube 74) to swing the hose. There is no such thing as twisting 102.

Next, a spraying operation procedure by the spraying device 10 according to the present embodiment will be described. First, the lift hook 48 is inserted into the lower part of the work vehicle 22, and the jack handle 66 is tilted to lift up the rear side of the work vehicle 22. Next, the telescopic frame 52 is contracted, and the side surface of the work cart 22 is held by the fork 54. Here, the drive wheel 56 is steered by operating the handle 68, and the gantry 18 is arranged at a position where the gantry 18 can move along the extending direction of the beam 12 (the direction of arrow B in FIG. 3). In this manner, by holding the side surface of the work vehicle 22 with the fork 54, the work vehicle 22 can be accurately and linearly moved forward and backward without rattling.

The mobile trolley 46 can be manually operated by an operator and can be automatically driven by a microcomputer built in the control box 70.

Next, the operator gets on the gantry 18, and extends and stops the column 20 to a position where the spray nozzle 76 faces the beam 12. Here, the arm 16 is operated by the operation lever 28 so that the rotation center of the spray pipe 68 is set at the vertical center of the beam 12. Next, the swivel table 84 is swung or the hand lever 98 is operated to move the spray pipe 68 to finely adjust and lock the spray surface of the beam 12 and the spray nozzle 76 so as to accurately face each other.

As described above, since the initial positioning of the spray nozzle 12 is performed by a manual operation visually by an operator without using a control mechanism, the spray nozzle 76 can be accurately positioned in a short time.

Next, when the spraying device 10 is operated, the hydraulic motor 100 rotates at the set rotation speed, and the spraying nozzle 76 swings (in the direction of the arrow A in FIG. 3), thereby causing the hose 102 to move. The refractory material 14 pumped through is automatically applied from the spray nozzle 76 to the spray area. By the swinging motion of the spray nozzle 76, the variation in the discharge amount of the refractory material 14 is corrected, and a high-quality spray film can be obtained.
The swing motion of the spray nozzle 76 is caused by the rotation of the rotary joint 11.
Since it is performed relative to the hose 102 by 0, the hose 102 is not twisted at the time of spraying.

In the automatic spraying state, based on the signal from the distance sensor, the control device turns, expands and contracts, or undulates the arm 16 to maintain the distance between the spray nozzle 76 and the beam 12 within a certain range. Make fine adjustments to

In the spraying apparatus 10 of the present embodiment, it is possible to mount two spraying nozzles 76. However, it is possible to design the whole apparatus compactly by installing one spraying nozzle having a large discharge capacity. it can.

Further, since the work carriage 22 simply needs to have a function of raising and lowering the gantry 18, a commercially available product can be used and the manufacturing cost of the entire apparatus can be reduced.

Next, an experimental example in which a refractory material is actually sprayed using the spraying device 10 according to the present embodiment will be described.

As the experimental conditions, the moving speed of the gantry 18 was 2.6 m / min, the spray width was 30 cm, the swing cycle of the spray nozzle 76 was 0.7 sec / cycle, and the discharge amount of the refractory material 14 was 27 L / min. min. The mixing ratio of the refractory material 14 was 40 by weight, 20 by cement, 20 by water, 20 by vermiculite, and 20 by gypsum.

As a result, as shown in FIGS. 4 and 5, when the measurement was performed at a moving distance of about 4.8 m, the spray thickness was 3 mm.
It was settled in the vicinity of 1 mm to 33 mm, and finished very smoothly as compared with the conventional manual spraying.
This is presumably due to the effect that the spray nozzle 76 swings at a high speed of about 1.5 times per second.

As shown in FIG. 6, the displacement of the work vehicle 22 with respect to the set trajectory is also within 40 mm, and the effect of clamping the side surface of the work vehicle 22 with the fork 54 also appears. Also, this displacement is corrected by the automatic control of the arm 16, and as shown in FIG. 5, the spray thickness has not been changed.

[0042]

Since the present invention has the above-described structure, the efficiency of the spraying operation is improved, the sprayed surface can be finished uniformly, and the muscle work can be greatly reduced with labor saving.
Further, there is no twist of the hose at the time of the spraying operation, and a commercially available aerial work vehicle can be used as it is.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a spraying operation is performed by a spraying device according to an embodiment.

FIG. 2 is a perspective view showing a driving mechanism of a spray nozzle of the spray device according to the embodiment.

FIG. 3 is a side view showing a state where a refractory material is sprayed on the beam.

FIG. 4 is a cross-sectional view of a beam coated with a refractory material in an experiment.

FIG. 5 is a graph showing experimental results.

FIG. 6 is a graph showing experimental results.

[Explanation of symbols]

 16 Arm 46 Moving cart (moving means) 48 Lift hook (lifting means) 52 Telescopic frame (clamping means) 54 Fork (clamping means) 56 Driving wheel (moving means) 66 Jack handle (steering means) 74 Blowing pipe (spraying) Means) 76 Spray nozzle (spray means) 84 Turning table 90 Mounting bracket 104 Cam (link means) 106 Cam (link means) 108 Link (link means) 110 Rotary pipe joint

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Tsutomu Horiguchi 2-5-5 Tsurumichuo, Tsurumi-ku, Yokohama-shi, Kanagawa Pref. Ask Co., Ltd. (58) Field surveyed (Int.Cl. ⁷ , DB name) E04F 21 / 08 B05B 13/04 B05B 15/08 E04B 1/94

Claims (2)

(57) [Claims] 1. A moving means for moving a gantry at a constant speed along an object to be sprayed, an arm installed on the gantry and capable of turning around a vertical line and extending and contracting in an axial direction, and a tip of the arm A turning table, which is provided around the first axis and which can be fixed at an arbitrary position, and a mounting bracket which is attached to the turning table and rotates around a second axis orthogonal to the first axis and can be fixed at an arbitrary position. A spraying means rotatably supported on the mounting bracket, a rotary joint connecting the spraying means and a hose,
A linking means for converting a rotational force of a rotating device provided on the mounting bracket into a swinging motion of the spraying means. 2. The vehicle according to claim 1, wherein the moving means is provided on the moving vehicle and is driven at a constant low speed, a steering means for steering the driving wheels, and expandable and contractable in a direction orthogonal to a traveling direction of the moving vehicle. And a lifting means disposed between the holding means and capable of lifting the rear side of the gantry. The spraying device according to claim 1.