JPS642433B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floor coating device for, for example, surface coating or line painting of tennis courts.

When spray painting a large floor surface such as a tennis court, schoolyard, or playground, conventionally, a spray device including a spray gun and a paint storage container are placed on a trolley, and the spray gun is manually operated while towing the trolley. I try to hold it while spraying, but
It takes considerable skill to spray uniformly and create a seamless border between adjacent painted surfaces, and the work is surprisingly labor-intensive. On the other hand, when working outdoors, the wind can blow the paint away, causing not only uneven blowing but also a source of pollution if there are adjacent houses. In view of this, the present applicant forms a booth with an open bottom surface on the truck, and installs a spray gun in the booth so as to reciprocate at a constant speed in a direction perpendicular to the direction of movement of the truck. A floor coating device has already been proposed in Japanese Patent Application No. 56-81994 (see Japanese Unexamined Patent Publication No. 57-19763). According to this device, by operating the above-mentioned spray gun while towing or self-propelling the trolley at a constant speed, the floor surface can be sprayed cleanly without requiring any skill and with almost no influence from wind etc. Can be painted. However, after actually using it at several construction sites, we found that if the above-mentioned spraying work was carried out over a relatively long period of time, the paint gradually adhered to the inner wall of the booth, and this dripped onto the floor and coated the surface. It has been found that there is a risk of creating unevenness. In addition, in this type of floor painting equipment, the spray gun is reciprocated while the trolley is moved at a constant speed, so the painted surface is finished in a zigzag pattern.
There is a risk that parts with different numbers of coatings will be created.

This invention is a further improvement on the device of the prior application described above, and its purpose is to provide a mist suction device communicating with the booth to forcibly remove paint mist from the floor surface. Our objective is to provide coating equipment. Another object of the present invention is to provide a floor coating device that can uniformly coat the entire floor surface many times.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

Referring to FIGS. 1 to 4, this floor coating apparatus includes a truck 1 having a pair of front wheels 2, 2 and a pair of rear wheels 3, 3, respectively. In this case, the front wheels 2, 2 are used as direction control wheels. That is, as illustrated in FIG. 4, the front wheels 2, 2 are held at both ends of the same axle 5, and this axle 5 is a vertically rotating shaft rotatably attached to the truck 1. It is pivotally supported at the lower edge of the shaft 4 in a substantially T-shape. The bearing housing 6 of the vertical rotating shaft 4 with respect to the axle 5 is connected to the bogie 1 via a suitable bracket member.
A pipe stem 7 extending laterally is attached to the pipe stem 7, and a handlebar 8 is inserted into the end of the pipe stem 7 in a substantially upright state. Note that the rear wheels 3, 3 are arranged with an interval narrower than the planned painting width. Also,
As illustrated in FIG. 2, the trolley 1 is towed by a winch or the like (not shown) via a wire rope 9, but it may also be self-propelled by being equipped with a motor or the like. This floor coating equipment is
A spray gun 10 that sprays paint toward a floor surface to be painted, and a guide means 11 that reciprocates the spray gun 10 at a constant height position behind the rear wheels 3 in a direction perpendicular to the moving direction of the trolley 1. We are prepared. In this embodiment, the guiding means 11 is the fifth
As shown in detail in FIGS. 7 to 7, four guide rails 15a to 15d made of rectangular cylindrical steel material are vertically and horizontally symmetrically framed perpendicularly to the direction of movement of the truck 1, and their frames. two pairs of gears 16a, 16b and 17a, 17b attached to both ends of the slider 19, which is moved along the guide rail via a pair of chains 18a, 18b extending between these gears. including. In this case, the slider 19 includes four guide rollers 20 and 2 that roll along the top and side surfaces of the guide rails 15a and 15c, respectively.
1 and a guide rail 15.
a lower substrate 24 having four guide rollers 23 that roll along the lower surfaces of the substrates 22 and 15d, and each of these substrates 22 and 24 has a pair of connecting plates disposed oppositely along the moving direction thereof. They are connected to each other by 25a and 25b (see FIG. 5). Incidentally, frame plates 26a and 26b having a U-shaped cross section are attached to these connecting plates 25a and 25b, and a pair of frame plates 26a and 26b, which have a U-shaped cross section and extend parallel to each other in the vertical direction with a predetermined interval, are attached to the opposing wall surfaces of the frame plates 26a and 26b. guide rail 27a,
27b are provided respectively. On the other hand, the chains 18a and 18b have bearing members 30a and 30b attached to each of them, and a rod 32 having a cam roller 31 that cooperates with the guide rails 27a and 27b described above is rotatably supported between them. ing. In this case, each of the chains 18a,
18b is operatively connected to the first motor 34 via one of the gears 16b, 17b and intermediate gears 33a, 33b associated therewith, as illustrated in FIG. They are continuously driven in the same direction by the first motor 34. In addition, the above spray gun 1
0 is attached to the end of an arm 35 provided to extend rearward from the lower substrate 24 of the slider 19, as clearly shown in FIG. Therefore, the chain 18 described above is driven by the first motor 34 via the intermediate gears 33a, 33b, etc.
When a and 18b are driven in a predetermined direction, the slider 19 is moved together with the chains 18a and 18b in a direction perpendicular to the moving direction of the truck 1 via the cam roller 31 disposed between the guide rails 27a and 27b. It will be done. And each gear 1
6a, 17a or 16b, 17b, the cam roller 31 moves toward the guide rails 27a, 2
The slider 19 is moved in the opposite direction to that described above in order to reverse its posture and enter the return path while rolling between the sections 7b and 7b. In this way, spray gun 10
is reciprocated together with the slider 19 at a predetermined speed in a direction perpendicular to the moving direction of the trolley 1. In addition, spray gun 10
has a hollow stem 36 attached to the arm 35, and a paint supply pipe extending from the main body of the spray device (not shown) is connected to the stem 36. Further, this floor coating apparatus includes a booth 40 formed at the rear of the cart 1 so as to surround the spray gun 10 that moves reciprocally as described above, and a mist suction device 41 that communicates with the booth 40. The booth 40 is composed of a casing member having an opening facing the floor surface to be painted, and a filter 42 that adsorbs the paint mist generated as the spray gun 10 sprays is removably installed inside the casing member. Further, a communication port 44 for connecting a flexible hose 43 is formed at the top of the mountain shape. In order to minimize the adverse effects of wind when spraying paint with the spray gun 10, it is preferable that the skirt portion of the booth 40 be as close as possible to the floor surface to be painted. The mist suction device 41 is
An exhaust duct 46 having an intake port 49 formed on the side so as to communicate with the flexible hose 43 described above and an exhaust port 45 opened upward.
In this exhaust duct 46, the upper air intake port 4
Sirotskov fan 4 provided coaxially with respect to 4
7, and a second motor 48 for driving this Sirotskov fan 47. Therefore, when performing paint spraying work using the spray gun 10, when the second motor 48 rotates the Shirotsuko fan 47, the paint mist filling the booth 40 is sucked upward into the booth 40 along with the air. However, most of it will be captured by the filter 42. And this filter 42
The air that has passed through is sucked into the exhaust duct 46 through the flexible hose 43, and is discharged to the outside from the exhaust port 45 by the centrifugal blowing action of the Sirotskov fan 47. In the above embodiment, the filter 42 is provided inside the booth 40, but it may be modified and installed inside the flexible hose 43, for example. In addition, as shown by the imaginary line in FIG.
1, and connect flexible hoses to the tops of each of them to communicate with the above-mentioned mist suction device 41. On the other hand, regarding the mist suction device, an axial flow blower may be used instead of the Sirotskov fan 47.

According to this invention, as described above, the booth 40 surrounding the spray gun 10 at the rear of the truck 1
A mist suction device 41 is installed in this booth 40.
By communicating with the booth 40, the paint can be sprayed cleanly without being affected by wind, etc., and the paint mist from inside the booth 40 is effectively suctioned and removed, so that the paint can be sprayed cleanly without being affected by wind or other factors. There is almost no risk that the paint adhering to the surface will drip onto the floor surface to be painted. Further, since the mist filter 42 is provided in the booth 40 or in the communication path leading to the mist suction device 41, there is no risk of harming the health of the workers.

By the way, in this floor painting apparatus, the spray gun 10 is reciprocated in a direction orthogonal to the moving direction while the trolley 1 is moved at a constant speed.
The painted surface is finished with a zigzag slope, and double-coated areas are created on the outbound and return passes of the spray gun 10. Further, as described above, the chain 18 is always driven in a fixed direction, and the cam roller 31 attached to the chain 18 is driven by each gear 16,
Since the moving direction of the slider 19 is reversed by reversing the slider 19 at the portion 17, the moving speed at the time of the direction change tends to be slightly delayed, and there is a possibility that uneven coating thickness may occur. Therefore,
In this invention, the moving speed of the cart 1, the reciprocating speed of the spray gun 10, and the rest time of the spray gun 10 are adjusted so that the entire floor surface to be painted is coated in multiple layers and the coating thickness is uniform. It is related as follows. That is, in FIGS. 8 and 9, the construction width is W (m) (this is the gears 16a, 17a, 16 provided on the guide means 11)
b, 17b), the moving speed of the spray gun 10 is V ₁ (m/sec), the pause time of the spray gun 10 is T (sec), and the distance of the spray gun 10 relative to the floor surface to be coated is Assuming that the spraying width is L (m) and the floor surface to be coated is to be painted twice while being pulled by the trolley 1 at a speed of V ₂ (m/sec), the spray gun 10 is set to cover the application width W, that is, the gear 16.
The distance L ₁ that the trolley ₁ moves while moving _between the centers _of During the time
That is, the cam roller 31 is connected to the gears 16a, 16.
The distance L ₂ that the trolley 1 moves during the time required to turn around in an arc along b is L ₂ =V ₂ ×T (2). Here, as is clear from Fig. 8, L
= 2(L ₁ +L ₂ ), so equations (1) and (2)
Substituting , we get L=2V ₂ /V ₁ (W+V ₁ T). Therefore, the moving speed V ₁ of the spray gun and the moving speed V ₂ of the trolley 1 are V ₁ /V ₂ = 2 (W+V ₁ T)/L...(3) On the other hand, if the radius of the gears 16a and 16b is R, as is clear from FIG. 9, the proportional equation πR:W=T:W/V ₁ holds true, and therefore, V ₁ T=πR... (4) becomes. By substituting this equation (4) into equation (3), the following equation is obtained: V ₁ /V ₂ =2(W+πR)/L...(5) Based on this equation (5), the movement of the spray gun 10 is By setting the speed and the moving speed of the trolley 1, the entire floor surface to be painted can be evenly finished with double coating. By the way, W=
If 1.5m, R=0.04m, and L=0.2m, then V ₁ /V ₂ ≈ 16.26. In addition, when applying 4 times, it is sufficient to set V ₁ /V ₂ = 4 (W + πR) / L, so the general formula is V ₁ /V ₂ = N (W + πR) / L (however, N is an even number). Note that this relational expression differs from the above embodiment in that a detection means such as a micro switch is provided on both sides of the guide means 11, and the first motor 34 is rotated in forward and reverse directions according to a signal from the detection means, thereby controlling the spray gun 10. This can also be applied to those that move back and forth, and in that case, the above equation (3) may be used as a general equation.

[Brief explanation of drawings]

Figure 1 is a front view of this floor coating equipment, Figure 2 is its plan view, Figures 3 and 4 are the
The right side view and left side view of the figure, FIG. 5 is an enlarged plan view of the main part showing the guide means of the spray gun, and FIGS. 6 and 7 are the - line in FIG. 5, respectively.
8 and 9 are diagrams for explaining the relationship between the moving speed of the cart and the moving speed of the spray gun in the case of multiple coating the floor surface to be painted. In the figure, 1 is a trolley, 8 is a handle, 10 is a spray gun, 11 is a guide means, 16 and 17 are gears, 1
9 is a slider, 31 is a cam roller, 40 is a booth, 41 is a mist suction device, and 42 is a filter.

Claims (1)

[Scope of Claims] 1. A trolley that moves continuously at a constant speed on a floor surface to be painted, a spray gun installed on the trolley, and a spray gun that moves the spray gun in a plane parallel to the floor surface to be painted. a spray gun guide means including a drive device that reciprocates in a direction perpendicular to the moving direction of the trolley, and by reciprocating the spray gun while moving the trolley, the spray gun is moved in a zigzag pattern. A floor coating device that spray-paints the entire surface of a strip-shaped area with a predetermined construction width, wherein the spray gun guide means includes a guide frame formed of a plurality of guide rails oriented perpendicularly to the moving direction of the dolly on the dolly. a slider that moves along the guide frame while holding the spray gun; at least one pair of gears provided on both sides of the guide frame; A chain continuously driven in a fixed direction by a drive device, a cam roller attached to the chain, and a pair of left and right rail members provided on the slider so as to extend in the vertical direction with the cam roller in between. The spray gun moves reciprocally between the gears together with the slider via a reversing mechanism consisting of the cam roller and a rail member, wherein the moving speed of the spray gun is V ₁ and the moving speed of the trolley is V 1 . V ₂ , where L is the spray width of the spray pattern of the spray gun on the surface to be painted, W is the construction width determined by the distance between the centers of each gear, and T is the rest time of the spray gun, By setting the respective speeds V ₁ and V ₂ as V ₁ /V ₂ =N(W+V ₁ T)/L (where N is an even number, T = πR/V ₁ , and R is the radius of the gear), the above A floor coating device characterized by uniformly applying multiple coats to the entire strip-shaped area to be coated.