JP5281244B2 - Paint cup for spray gun - Google Patents

Description

The present invention relates to a paint container which is directly attached to a spray gun for painting and supplies paint to be sprayed to the spray gun.

The spray gun for painting, in which the paint is atomized by air, can be classified according to the method of feeding the paint to be used to the spray gun. The spray guns that are usually held by a worker for spraying can be divided into a system in which paint is pumped from a supply device such as a pump and a system in which a small-capacity container is directly attached to the spray gun. When the container is attached, there are a case where a paint container is attached below the spray gun and a case where a paint cup having a relatively small capacity is attached to the upper part of the spray gun.

When a paint container is attached to the upper part of the spray gun, the paint can be supplied by flowing into the spray gun by gravity from the lower joint, so that even a small amount of paint can be used, and it is effective when paint changes such as color change are frequent There is an effect that can be used. On the other hand, when a container is attached to the bottom of the spray gun and spraying the paint underneath using the suction force of the spray gun, the suction force is required and at the same time, some paint remaining on the bottom of the container and the suction. There is a drawback that the paint in the upper tube cannot be used.

The method of providing a paint cup at the top is widely used because of its advantages, although it is lower than the method of providing a container below in terms of operational stability. Among the cases where the paint container is provided, there are a case where the paint container is attached directly above and a case where the paint container is attached to a joint projecting sideways.

The side type that is attached to the side can rotate the container around the mounting shaft, and the container can be stood and fixed with the spray shaft of the spray gun facing down, so the range of usage is widened, especially for many types It is often used when working with small amounts of paint.

This type of spray gun is generally equipped with a means to adjust the amount of paint sprayed to enable painting according to the paint conditions, and most of its mechanism is a needle valve that closes the opening at the tip of the paint nozzle. The opening degree is adjusted, and the rear end of the needle valve is stopped by the setting position of the adjustment knob, and the opening degree is adjusted by adjusting the reverse amount.

Therefore, when adjusting the retraction amount of the needle valve, the valve spring arranged at the rear of the needle valve is in a compressed state, and the trigger operation when the needle valve is opened is heavier than usual and the operational load is reduced. It will hang. Such an excessive load not only impairs the usability of the spray gun but also causes a disaster such as tendonitis, leaving room for improvement as a problem depending on the use conditions.

In addition, the paint cup with the paint outlet below has the trouble of having to replace it with another container because the paint leaks when removed from the spray gun unless the paint in the container is empty. This is troublesome when changing the paint.

For this reason, on the lid of the paint container provided with an outlet on the lower side, a valve for closing the outlet on the lower side is provided so as to be openable and closed, and when the container is removed, the outlet is closed to facilitate replacement and keep the container as it is. The technology that has been made possible is disclosed in Japanese Utility Model Publication No. 6-46525.

However, in this case, there is a knob for operating the valve body on the lid of the container, and opening / closing adjustment is not possible unless the lid is attached to the container, and the opening when adjusted is unstable depending on the state of the lid. It is unsuitable for such adjustment, and there is a problem as a high-precision adjustment means for coating with a small amount of ejection or low-viscosity paint. Further, since the lid cannot be opened with the outlet closed, it is very troublesome when the paint is replaced with another container after the container is removed from the spray gun. Moreover, since the valve main body is located in the center part and outflow port of a container, it cannot be used as a container provided with the stirring blade.

Japanese Utility Model Publication No. 6-46525

The present invention makes it easy to remove the side cup type paint container from the spray gun regardless of the remaining paint, and the paint outlet is blocked regardless of the container lid even after the removal. It is intended to provide a paint container for a spray gun that is easy to handle without any problems.

In addition, by providing a control valve that is integrally fixed to the spray gun connection, the control valve enables accurate adjustment without destabilizing the accuracy due to other factors. Further, it is an object of the present invention to provide a spray gun paint container capable of supplying a highly accurate ejection amount adjustment regardless of a spray gun even with a low-viscosity paint that easily flows. Furthermore, it is set as the structure which does not arrange | position the said adjustment means so that there may be no restriction | limiting when installing a filter and a stirring means inside a container.

Bend the outlet at the lower end of the paint container to form a passage in the lateral direction, and provide a joint at the tip of the paint container that can be connected to the spray gun. A paint inflow adjustment valve is provided, and the amount of spray can be adjusted by an external adjustment knob. Fitting a passage on a valve seat which communicates provided, the valve element abuts distraction to the valve seat, through the airtight holding means, formed in the knob integrally provided outside the passage joint portion formed, The valve body is advanced and retracted by the rotation of the knob, and the opening degree of the valve seat and the valve body is adjusted.

The valve body may be provided with an adjustment valve having a valve seat formed on the outlet side formed in the lower part of the paint container, and the outlet may communicate with a joint passage connected to the spray gun. Airtight holding means, and a fitting inserted seal ring hermetically between the shaft and the valve guide of the valve body is provided with means for relative position of the valve body and the valve guide can be fixed in any position.

Since the adjustment valve provided directly in the container body is arranged at the outlet provided in the lower part of the container so that the opening degree of the valve can be adjusted, the opening and closing of the lower outlet and the outlet in the container alone are possible. The flow rate of the paint can be adjusted with high accuracy. Therefore, if it connects with a spray gun by the joint provided in the outflow end, the coating by the stable and exact coating amount of paint can be performed, without adjusting the amount of coating material sprayed by a spray gun.

The amount of paint spillage can be easily adjusted by rotating the knob, and when attached to the spray gun, it can be easily operated with the knob located beside the mounting part, and can be fixed at any opening. Even if it is interrupted by replenishment of paint, etc., the work can be resumed in the same state, and stable coating quality can be obtained.

If a valve is provided at the outlet and adjusted by a knob provided outside the bottom, the knob is arranged below the container so that it does not get in the way and the size of the knob extending downward is set appropriately. For example, when the operation is stopped, the spray gun can be placed on the table in a well-balanced state.
Furthermore, since nothing is present inside the container, it is easy at the time of washing, and even if a stirrer, a filtration net, or the like is arranged inside, there is no problem and the range of utilization can be expanded.

The paint container of the present invention is used in a spray gun having a structure in which a paint container is attached above the spray outlet of the spray gun, and the container is disposed beside the spray gun. FIG. 1 shows a schematic configuration of the spray gun. Reference numeral 1 denotes a spray gun main body, which is provided with an atomizing device mainly including a paint nozzle 2 and a needle valve 4 for opening and closing the jet nozzle 3 and an air cap 5 at the tip side, and an adjusting device at the rear. The adjusting device includes a spray pattern adjusting device 6 and a paint adjusting device 8 that regulates the retraction amount of the needle valve 4 to adjust the ejection amount.

The paint adjusting device 8 regulates the rear end of the needle valve 4 with the inner end of the paint adjusting knob 24. The paint adjusting knob 24 is screwed to the left, and the rear end of the needle valve 4 and the inner end of the paint adjusting knob 24 are If the clearance distance is reduced, the retraction amount of the needle valve 4 is reduced by that amount, and the opening degree is small and the ejection amount is reduced.
For this reason, when the amount of paint sprayed is adjusted with a spray gun, the valve spring 9 which is provided at the rear of the needle valve and serves to close the valve is deflected, and the load of the valve spring is increased, so that the operation of the trigger 10 becomes heavy. It will be.

The paint container 11 is configured in the AA cross section of FIG. 1 in a cup shape with an upper opening as shown in FIG. 2 and an outlet at the lower part, and is connected to the outlet 12 in the lateral direction. The joint body 15 is provided at the tip of the passage 13 formed in the joint 13 with the joint 14 connected to the connection port 21 provided on the side of the spray gun. A removable lid 7 is fitted in the upper opening of the container 11.

The joint body 15 is formed integrally with the container 11, a small diameter step portion is provided on the joint side in the passage provided inside to form a valve seat 16, and a valve body that contacts and separates from the valve seat 16. 17 is provided to constitute a control valve. The valve body 17 is formed integrally with a knob 19 that passes through a valve guide 18 attached to the joint main body and is located outside. Here, the screw portion 20 is provided on the knob 19 and is screwed into the screw portion provided on the valve guide 18, and the valve body 17 is moved forward and backward by the rotation of the knob 19, and the gap with the valve seat 16 is changed to change the flow rate. Will be adjusted. Such a configuration is widely used for a control valve, and an airtight holding means such as a seal ring 22 is provided between the valve element 17 and the valve guide 18.

In this embodiment, the screw portion 20 is provided with a jam nut 23 so that the adjusted position of the valve body can be temporarily fixed. This prevents the adjustment valve from being inadvertently opened and the adjustment position from changing.

When the spray gun having the paint container 11 having the above-described configuration is used, the paint in the paint container is sprayed from the jet nozzle 3 by opening the needle valve 4 by the operation of the spray gun. The spray amount from the spray gun is usually adjusted by operating the paint adjusting knob 24 of the paint adjusting device 8 and regulating the retraction amount of the needle valve according to the coating conditions. In this case, the needle valve 4 is operated. The trigger 10 to be loaded has a high load, impairing the operability, and its adverse effects are caused by long-term use.

In this embodiment, the paint adjusting device 8 is fully opened and used at a position where the trigger operation is easy. The paint spray amount is adjusted by operating the knob 19 of the joint body 15 provided at the lower part of the paint container. The amount of jetting can be adjusted by changing the gap between the seats and adjusting the flow rate supplied to the spray gun.

For this reason, it is possible to adjust the ejection amount without affecting the trigger operation, and since the adjustment amount is used in a fixed state, the effect of maintaining stable coating conditions can be obtained. Further, since the adjustment is performed at the position of the valve body 17 itself, the fluctuation factor is suppressed, and the adjustment can be performed with high accuracy, and the adjustment can be stably performed even when the paint having a small ejection amount or low viscosity is used.

If the valve body 17 is fixed at the closed position, the outflow of the paint is stopped, and even if the joint 14 connected to the spray gun is removed, the paint can be removed while the paint is put in without flowing out from the container. Therefore, it is possible to store each container, and it is possible to respond quickly when changing colors, and it is possible to more effectively use this type of spray gun particularly suitable for coating a small amount of various objects.

In the example of FIG. 3, a regulating valve 17 is provided along the downward direction of the outlet 12 formed in the lower portion of the container 11, and the outlet of the regulating valve is communicated with a joint side with a spray gun provided in the lateral direction. Is. Parts having the same functions as those in the configuration of FIG. 2 are indicated by the same symbols, and a valve body 16 is provided at the outlet 12 formed below the container 11 and is brought into contact with and separated from the outlet to adjust the flow area. 17 extends downward.

The valve body 17 has a threaded portion 22 that is screwed into a valve guide 18 that is screwed into the joint body, and is integrated with an external knob 19. The downstream side of the valve seat 16 communicates with a joint 14 attached to the passage 13 of the joint body portion that is opened in a direction transverse to the axis of the valve body 17. 2 is formed in the same lateral direction as the joint 14 in FIG. 2, whereas in the case of FIG. 3, the regulating valve is formed in a direction perpendicular to the joint and a knob 19 is arranged below the container.
The lower part of the knob extends downward in the form of a bar. When the container is attached to the side of the spray gun and placed on a table, the leg that extends in the form of a bar serves as a fulcrum and does not fall down. It can be configured.

These are the cross-sectional block diagrams of the spray gun which uses the coating material container of this invention. FIG. 2 is a cross-sectional view of the paint container mounting portion showing the AA cross section of FIG. 1. These are sectional drawings which show another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, Spray gun 2, Paint nozzle 3, Jet nozzle 4, Needle valve 5, Air cap 6, Pattern adjusting device 8, Paint adjusting device 9, Valve spring 10, Trigger 11, Paint container 12, Outlet 13, Passage 14 , Joint 15, joint body 16, valve seat 17, valve body 18, valve guide 19, knob 24, paint adjustment knob

Claims (4)

The spray gun paint container is attached to the paint connection port provided on the side of the spray gun, with the connection joint on the lower part and the container on the upper part, bent from the outlet located at the lower part of the paint container. An adjustment valve that forms a passage communicating with the connection joint, forms a valve seat by providing a step in the passage, and coaxially provides a valve body that contacts and separates from the valve seat, and the valve body can be adjusted from the outside. A paint container for spray guns. The adjusting valve has a step in the connecting joint side passage to form a valve seat, a valve body that contacts and separates from the valve seat is provided coaxially, and the valve body is connected to the joint portion in which the passage is formed. 2. The spray according to claim 1, wherein the spray is formed integrally with a knob provided outside through an airtight holding means and a threaded portion, and the opening degree of the valve seat and the valve body is adjusted by rotation of the knob. Gun paint container. The adjusting valve is provided with a step on the outlet side between a passage communicating with the outlet and the connection joint to form a valve seat, and a valve body that contacts and separates from the valve seat is provided coaxially. 2. The spray according to claim 1, wherein the body is formed integrally with a knob provided outside through an airtight holding means and a screw portion, and the opening degree of the valve seat and the valve body is adjusted by rotation of the knob. Gun paint container. The airtight holding means is a seal ring that is airtightly inserted between a valve body shaft and a valve guide into which the threaded portion of the valve body is screwed, and the relative position between the valve body and the valve guide is fixed at an arbitrary position. The spray gun paint container according to claim 2 or 3, further comprising means capable of forming the spray gun.

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