JPS5857983B2 - Pressure-feeding painting roller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure-feed type painting roller in which a paint supply pipe having a paint discharge port on the peripheral wall is arranged concentrically in the center of the paint roller body.

In this type of pressure-feeding type painting roller, when the roller body is used in a horizontal state, the paint flows out approximately evenly from each paint outlet of the paint supply pipe over the entire axial direction of the roller body. However, when the roller body is used vertically vertically, the paint flows out in a concentrated manner from the lower end of the paint supply pipe, causing the paint to flow out evenly. It is not possible to uniformly supply the paint to the entire axial direction of the roller body, resulting in paint dripping from the lower end of the roller body and uneven coating.

The present invention aims to provide a pressure-feed type coating roller that is free from the above-mentioned problems, and one embodiment thereof will be described below with reference to the attached illustrative drawings.

In Fig. 1, 1 is a paint supply pipe that rotatably supports the roller main body 2, and is made by concentrically connecting two pipes 1a and 1b with a partition plate 3 interposed between them. , the peripheral wall has a large number of paint discharge ports 4.

The roller main body 2 consists of a cylindrical brush layer 5 and a roller core 6 that supports it. The roller core 6 guides the paint flowing out from the paint supply pipe 1 to the cylindrical brush layer 5 (through numerous flow paths This is a conventionally known method.

7a and 7b are L-shaped joints 8a and 8 at both ends of the paint supply pipe 10.
This is a relay pipe that is connected to the main paint supply pipe 9 that also serves as a handle in a T-shape via an automatic switching valve 10.

This automatic switching valve 10 has a steel ball 11 loosely fitted therein, and has two steel balls 11 facing each other on an axis parallel to the axial direction of the paint supply pipe 1 and communicating with the relay pipes 7a and 7b, respectively. The two outlet ports 12a are provided with outlet ports 12a, 12b and one inlet port 13 communicating with the main paint supply pipe 9.

The steel ball 11 is configured to close the lower part of the ball 12b by gravity.

The cavity 14 into which the steel ball 11 is loosely fitted and which is provided with the outlets 12a and 12b and the inlet 13 has an approximately two-dimensional shape with the inlet 13 at the top and the outlets 12a and 12b at both ends of the bottom. It is formed into an equilateral triangle, and when the inlet 13 is at the bottom, the steel ball 11 is configured to move freely due to the flow of paint at a location in the cavity 14 near the inlet 13.

The method of use is the same as the conventional one, by supplying the paint pumped from the paint pumping means to the main paint supply pipe 9,
The paint is transferred from the cavity 14 in the automatic switching valve 10 to the relay pipe 7.
It flows into the paint supply pipe 1 through a and 7b, and flows out from the paint discharge port 4 via the roller core 6 to the cylindrical brush layer 5, so that the cylindrical brush layer 5 is applied onto the surface to be painted. Painting is done by rolling.

In the above painting operation, when holding the main paint supply pipe 9 upward and moving the roller main body 2 up and down in a horizontal state,
Since the automatic switching valve 10 has its inlet 13 at the bottom, the steel ball 11 simply moves freely within the cavity 14 as described above, resulting in two outlet ports 12a.

12b is kept open so that the paint is supplied to the paint supply pipe 1.
The paint is evenly fed from both ends of the pipes 1a and 1b, and the paint is supplied almost evenly over the entire area of the roller body 2.

When performing painting work by rolling horizontally with the roller main body 2 facing the vertical direction 15, the steel balls 11 have two outlet ports 12a and 1 facing each other vertically, as shown in FIG.
2b, for example, the lower outlet 12b is closed by gravity and paint pressure, so the paint flows from the outlet 12a to the relay pipe 7.
Single pipe 1 connected to the upper half of the paint supply pipe 1 through a
The paint is fed under pressure only to part a, and therefore the paint is supplied only to the upper half of the roller body 2. During the painting process, this paint also flows to the lower half of the roller body 2 due to gravity, so as a result, the paint is supplied to the lower half of the roller body 2. The paint is supplied to the entire area of the roller body 2, and the entire length of the roller body 2 can be used for painting work.

Note that during painting work in which the roller main body 2 is moved horizontally in a horizontal state, the inlet 13 of the automatic switching valve 10 is not located at the lowest bottom of the cavity 14, so the steel balls 11
Otherwise, there is a risk that either one of the outlet ports 12a and 12b may be blocked.

Therefore, as shown in FIG. 2, the central part of the cavity 14 is expanded in diameter approximately concentrically with the axes of the two outflow ports 12a, 12a, and the inflow port 13 is located in this expanded diameter part. As a result, regardless of the orientation of the main paint supply pipe 9 which also serves as a bundle, the steel ball 11 is positioned at the bottom of the central expanded diameter part of the cavity 14, ensuring that both outflow ports 12a and 12b are in an open state. Can be kept.

In the second embodiment shown in FIG. 3, a single pipe 1a constitutes a paint supply pipe 1 with two outer ends closed.

1b are two outlets 12a of the automatic switching valve 16.

Pipe section 1 directly connected to 12b and forming an inlet 13
7 is formed into a flat shape and has an appropriate length, and a main paint supply pipe 9 is connected to the end thereof, and the roller main body 2 is divided into two in the axial direction to form each single unit 2a.

2b are rotatably supported on the pipes 1a and 1b separately.

In addition, in the third embodiment shown in FIGS. 4 and 5, the inner ends of the pipes 1a and 1b that separately support the rollers 2a and 2b of the embodiment shown in FIG. and an automatic switching valve 19 connected to the main paint supply pipe 9.
two outlet ports 12a.

12b, two pipes 20a which also serve as support rods are installed between the automatic switching valve 19 and the fitting 18.

20b and two channels 21a formed in the fitting 18.
, 2 l b and each pipe unit 1 a.

1b and communicated with each other separately.

Also in the second and third embodiments described above, when the roller main body 2 is in the vertical direction, the automatic switching valves 16, 1
9, the paint is supplied only to the upper half of the roller main body 2, and the same effect as in the first embodiment can be obtained.

The pressure-feeding type painting roller of the present invention can be implemented and used as described above, and for example, when painting the hem of a wall, the painting work is performed with the roller main body facing up and down. In some cases, the automatic switching valve can automatically supply paint to the upper half of the roller body. This eliminates the possibility of uneven coating caused by hardly any paint being supplied to the upper end of the roller body, and the paint supplied to the upper half of the roller body is transferred onto the surface to be coated by the roller body. By flowing into the lower half of the roller body during the moving process, the entire length of the roller body can be utilized to perform uniform and efficient painting work.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal plan view showing a first embodiment of the present invention, FIG. 2 is a longitudinal side view showing a modification of the automatic switching valve, and FIG. 3 is a partially longitudinal plan view showing a second embodiment. , FIG. 4 is a partially vertical plan view showing the third embodiment, and FIG. 5 is a vertical cross-sectional side view of FIG. 4. 1...Paint supply pipe, la, 1b...Pipe unit, 2...Roller unit, 2at2b.
...Roller unit, 3...Partition plate, 4.
...Paint discharge port, 7a. 7b...--Relay pipe, 9...-No.2/2-purpose paint supply main pipe, 10, 16, 19...-Medium acting switching valve, 11...-Steel ball , 18... Joint metal fittings, 20a, 20b... Pine that also serves as a support rod.

Claims (1)

[Claims] 1. A pressure-feeding type painting roller in which a paint supply pipe with a paint discharge port on the peripheral wall is arranged concentrically in the center of the main body of the paint roller, and the paint is force-fed to the paint supply pipe. The supply pipe is divided into a part that supplies paint to one end area in the axial direction of the roller body and a part that supplies paint to the other end area, and a paint supply that supplies paint to this image area. A pressure-feeding type painting roller that is equipped with an automatic switching valve that supplies paint to the upper side when the paint supply pipe is in the vertical direction.