Paint supply device

Abstract

To provide a paint supply device that is advantageous for improving work efficiency and reducing costs. [Solution] The paint supply device 10 includes a diaphragm pump 13 that sucks paint from the storage tank 11 and pumps it into the hose 12, a discharge nozzle 16 that discharges the paint pumped into the hose 12, and a cock 17 that switches between supplying and stopping the paint.

Description

Technical Field

[0001] The present invention relates to a paint supply device.

Background Art

[0002] On the race tracks of auto race courses and motorcycle race tracks, paving paints are applied for the purpose of improving skid resistance (see, for example, Patent Document 1). This paint is a high-viscosity paint containing silica sand. In the application work, an operator transports the paint in a bucket or the like, drops an appropriate amount onto the race track surface, and spreads it uniformly with a tool called a rake.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] For this type of work, improvement in work efficiency is required, and a plan to pump the paint with a pump is conceivable. However, since the paint applied to the above-mentioned race track surface is a special paint called circuit paint, there is a risk of problems such as clogging even when a monopump used for transferring high-viscosity liquids is used. In addition, a monopump is costly, which is disadvantageous for cost reduction. Therefore, an object of the present invention is to provide a paint supply device that is advantageous for improving work efficiency and reducing costs.

Means for Solving the Problems

[0005] An aspect of the present invention is a paint supply device used for the work of applying paving paint to a predetermined road surface, wherein the paint is a paint containing silica sand, and the device comprises a diaphragm pump for drawing the paint from a storage tank 11 and pressurizing it into a hose, a discharge nozzle for discharging the paint that has been pressurized into the hose, and a cock for switching the supply / stop of the paint. [Effects of the Invention]

[0006] According to the present invention, it is possible to provide a paint supply device that is advantageous in improving work efficiency and reducing costs. [Brief explanation of the drawing]

[0007] [Figure 1] This figure shows a paint supply device according to an embodiment of the present invention. [Figure 2] This is a schematic diagram showing the structure of a pump. [Figure 3] This figure shows an example of how a paint supply device is used. [Modes for carrying out the invention]

[0008] Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows a paint supply device 10 according to an embodiment of the present invention. The paint supply device 10 is a device used for applying a predetermined paint to the track surface of specific sports venues such as auto racing tracks and velodromes. The paint is a paving paint containing silica sand, fibers, etc., for the purpose of preventing slippage and deterioration, and is referred to as a special paint, circuit paint, anti-slip paint, or anti-slip paint used in specific sports venues.

[0009] As shown in Figure 1, the paint supply device 10 includes a storage tank 11 for storing paint, a pump 13 connected to the storage tank 11 via a hose 12, an air compressor 14 that supplies air pressurized to a predetermined pressure to the pump 13, and a discharge nozzle 16 connected to the discharge port of the pump 13 via a hose 15. A cock 17 for switching the supply / stop of paint and a flow meter 18 for measuring the flow rate of paint flowing through the path are arranged along the path from the storage tank 11 to the discharge nozzle 16.

[0010] Flexible hoses are used for hoses 12 and 15. Therefore, the pump 13 and air compressor 14 can be positioned without being restricted by the location of the storage tank 11. In addition, hose 15 does not hinder the movement of the worker holding the discharge nozzle 16. However, if the positional relationship between the storage tank 11, pump 13 and air compressor 14 is fixed, metal piping or the like may be used as appropriate.

[0011] A pneumatically driven diaphragm pump is used for pump 13. A widely available diaphragm pump can be used for pump 13. The air compressor 14 is connected to pump 13 via an air hose 19 and supplies the air pressure necessary to drive pump 13. For the air compressor 14, a widely available air compressor driven by a motor or engine can be used.

[0012] The discharge nozzle 16 discharges the paint that has been pumped from the pump 13 into the hose 12. In the example shown in Figure 1, the discharge nozzle 16 comprises a long, cylindrical body 16a having a discharge path and outlet for discharging paint, and a grip 16b for the operator to hold. The presence of the grip 16b allows the operator to easily carry the discharge nozzle 16 and also makes it easy to adjust the orientation of the cylindrical body 16a. Furthermore, because it is equipped with a long, cylindrical body 16a, the operator can bring the discharge port of the cylindrical body 16a close to the road surface without having to bend down, and can discharge paint to the desired location on the road surface.

[0013] The discharge path of the cylindrical body 16a is provided with a constriction that narrows the opening area toward the discharge port. By providing a constriction, the discharge pressure of the paint can be increased and the discharge range of the paint can be narrowed. This makes it easier for the operator to discharge the paint to the desired location. It also makes it easier to supply the paint in a linear fashion onto the road surface. However, the structure and shape of the discharge nozzle 16 may be changed as appropriate.

[0014] The cock 17 is a manual cock that allows the operator to easily switch the supply / stop of paint. For example, a lever-type cock is used for cock 17. However, a switching member that can switch the supply / stop of paint can be widely applied to cock 17. Also, the position of cock 17 may be changed as appropriate.

[0015] The flow meter 18 has the function of measuring the flow rate of paint flowing through the hose 15 and displaying the measurement result. The structure and function of the flow meter 18 are not particularly limited, but for example, a flow meter equipped with a fitting to which the hose 15 is connected can be used. A widely available flow meter can also be used for the flow meter 18.

[0016] Figure 2 is a schematic diagram showing the structure of pump 13, which consists of a diaphragm pump. The left side of Figure 2 shows the state in which the diaphragm 20 inside the pump 13 has moved to the left, and the right side of Figure 2 shows the state in which the diaphragm 20 has moved to the right. The pump 13 comprises a pair of left and right pump chambers 21, a suction port 22, and a discharge port 23. The suction port 22 is connected to the storage tank 11 via a hose 12, and the discharge port 23 is connected to the discharge nozzle 16 via a hose 12. Each pump chamber 21 is divided into a liquid chamber 21a and an air chamber 21b by a diaphragm 20. The left and right diaphragms 20 are connected by a shaft 24 and are movable from side to side.

[0017] The suction path 25 connected to the suction port 22 branches into two, each communicating with a liquid chamber 21a. A check valve 26 is provided between each suction path 25 and each liquid chamber 21a to prevent outflow from the liquid chamber 21a. The discharge path 27 connected to the discharge port 23 branches into two and communicates with each liquid chamber 21a. A check valve 28 for preventing the outflow from the liquid chamber 21a is provided between each discharge path 27 and each liquid chamber 21a.

[0018] When the pump 13 operates, the diaphragms 20 of each pump chamber 21 reciprocate left and right by the air pressure from the air compressor 14. In FIG. 2, the flow of the paint from the storage tank 11 is indicated by arrows. As shown in FIG. 2, when the left and right diaphragms 20 move to the left, paint flows from the suction port 22 into the liquid chamber 21a of the right pump chamber 21, and the paint is discharged from the liquid chamber 21a of the left pump chamber 21 toward the discharge port 23. Also, when the left and right diaphragms 20 move to the right, paint flows from the suction port 22 into the liquid chamber 21a of the left pump chamber 21, and the paint is discharged from the liquid chamber 21a of the right pump chamber 21 toward the discharge port 23.

[0019] The pump 13 repeats the suction and discharge of the paint by the reciprocating movement of the left and right diaphragms 20 left and right. Since the suction and discharge of the paint are performed by the movement of the diaphragm 20, even when the paint contains silica sand or fibers, the paint can be stably discharged without causing problems such as clogging. Also, since the diaphragm pump has a simpler structure than a mono pump, the acquisition cost can be suppressed.

[0020] The pump 13 is driven by a relatively low-pressure air pressure, for example, it operates at an air pressure of less than 1 MPa (less than 10 kgf / cm 2 less than). Therefore, excessive pressure is unlikely to occur, and as a result, pressure relief piping and relief valves are unnecessary.

[0021] FIG. 3 is a diagram showing an example of the usage situation of the paint supply device 10. In Figure 3, the track surface is indicated by the symbol 100. The track surface 100 is the banked section of a specific sports venue, such as an auto race track or a velodrome. As shown in Figure 3, worker HM1, holding the discharge nozzle 16, positions the tip of the discharge nozzle 16 close to the track surface 100 and supplies the paint discharged from the discharge nozzle 16 to the track surface 100 in a linear fashion along the direction of travel. Another worker HM2 is positioned behind him and spreads the paint supplied to the track surface 100 evenly with a rake 31. A brush or wiper may be used instead of the rake 31.

[0022] In this way, the paving paint is applied to the inclined road surface 100. Compared to the case where workers manually transport the paint using containers such as buckets and supply the paint from the containers to the road surface 100, this method allows for easier and more stable supply of the paint, improving the uniformity of the application. Furthermore, since the paint supply device 10 is equipped with a flow meter 18, the amount of paint used can be easily checked, making it easier to understand and manage the amount used relative to the area to be covered, and preventing unexpected interruptions to the application work.

[0023] As described above, the paint supply device 10 of this embodiment includes a diaphragm pump 13 that draws paint from the storage tank 11 and pumps it into the hose 12, a discharge nozzle 16 that discharges the paint pumped into the hose 12, and a cock 17 that switches between supplying and stopping the paint. Therefore, compared to manual transport of paint, stable automatic supply is possible even for high-viscosity paints containing silica sand, and the paint can be supplied uniformly, suppressing uneven coating. In addition, since a diaphragm pump with a simpler structure compared to monopumps can be used, the cost of the paint supply device 10 can be reduced. As a result, work efficiency can be improved and costs can be reduced.

[0024] Furthermore, since the diaphragm pump 13 is pneumatically driven and equipped with an air compressor 14 that supplies air pressure to the diaphragm pump 13, driving the diaphragm pump 13 with low air pressure makes it less likely for excessive pressure to be generated, eliminating the need for pressure relief piping and relief valves. This simplifies the configuration of the paint supply device 10.

[0025] Furthermore, since it is equipped with a flow meter 18 to measure the flow rate of paint, the amount of paint used can be checked, making it easier to manage the required amount. Furthermore, since the discharge nozzle 16 is equipped with a throttle that increases the discharge pressure, the discharge pressure can be appropriately increased even with high-viscosity paints containing silica sand, which is advantageous for improving work speed.

[0026] The above embodiments are merely illustrative examples of one aspect of the present invention, and can be modified and applied at will without departing from the spirit of the invention.

[0027] For example, the configuration of each part of the paint supply device 10 may be changed as appropriate. For instance, the flow meter 18 may be omitted, or a discharge nozzle without a throttling function may be used for the discharge nozzle 16. Furthermore, the pump 13 is not limited to a pneumatically operated diaphragm pump; for example, an electric diaphragm pump or an engine-driven diaphragm pump may also be used. [Explanation of Symbols]

[0028] 10 Fuel supply device 11 Storage tank 12,15 Hose 13. Pump (Diaphragm Pump) 14 Air Compressor 16 Discharge nozzles 17 Cook 19 Air hose 20 diaphragms 21 Pump Room 22 Inlet 23 Discharge port 24 shafts 25 Suction path 27 Discharge route 31 Rake 100 Track surface HM1, HM2 Workers

Claims

1. A paint supply device used for the work of applying paving paint to a predetermined road surface, The aforementioned paint is a paint containing silica sand, A diaphragm pump for drawing the paint from the storage tank and pumping it into a hose, a discharge nozzle for discharging the paint pumped into the hose, and a cock for switching the supply / stop of the paint, A paint supply device equipped with the following features.

2. The aforementioned diaphragm pump is air-driven, The diaphragm pump is equipped with an air compressor that supplies air pressure to the diaphragm pump. The paint supply device according to claim 1.

3. The system includes a flow meter for measuring the flow rate of the aforementioned paint. The paint supply device according to claim 1 or 2.

4. The discharge nozzle is equipped with a throttle to increase the discharge pressure. The paint supply device according to claim 1.

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