JPH08192095A - Oozing type coating roller - Google Patents

Abstract

PURPOSE: To ooze a coating material approximately uniformly from the outside surface of a roller, to uniformly apply the coating material and to prevent clogging by forming the discharge holes of a discharge pipe by slender slits in an axial direction and forming the opening area of the discharge holes larger on the front end side of the discharge pipe than on the base part side. CONSTITUTION: A discharge pipe 14 is obtd. by forming right and left ends 14a, 14b of plastic materials to a cylinder, forming an intermediate part 14c to a hollow triangular pile shape and forming the discharge holes, i.e., slits 15, extending in an axial direction. The opening quantity of the discharge part of the discharge pipe 14 by the respective slits 15a to 15c increases gradually from the base part side where the pressure increases toward the front end part side where the pressure decreases. The coating material discharged from the discharge pipe 14 is, therefore, discharged approximately uniformly from the overall length of the discharge pipe 14. Eventually, the coating material is uniformly oozed from the outside surface of the main body 20b. Since the respective slits 15a to 15c are formed slender in the axial direction, the clogging is substantially prevented even with the coating material of a high viscosity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bleeding type coating roller for coating a surface to be coated while bleeding the coating material from an axial center portion of the roller toward an outer peripheral portion thereof.

[0002]

2. Description of the Related Art As a conventional technique, Japanese Patent Publication No. 63-5386.
There is one described in Japanese Patent Laid-Open No. 5 (5), that is, one shown in FIG. In FIG. 9, A is a bleeding type coating roller, and a shaft tube 2 is projectingly fixed to the left end on the upper end portion of a support tube 1 for sending out the paint, and a discharge tube 3 is leftwardly attached to the shaft tube 2. Fix it protruding toward. The discharge pipe 3 is cut out in the left-right direction at the outer periphery of the middle part that leaves both left and right ends, and small-size discharge holes 4 are opened in the cut-out part 3a at predetermined intervals in the left-right direction. The shaft pin 5 is screwed into the left end of the discharge pipe 3 to close the left end of the discharge pipe 3. A cylindrical roller 8 is fitted on the outer circumference of the discharge pipe 3, and support caps 6, 7 having a diameter slightly larger than the left and right ends of the discharge pipe 3 are fitted and fixed on the left and right ends thereof, respectively. The shaft pin 5 is rotatably supported by the left end of the shaft pin 5 and the right end of the shaft tube 2 via. Roller 8 above
Is formed by fitting and fixing a water-permeable main body 8b such as sponge or felt on the outer circumference of a rigid cylindrical core 8a having a large number of small holes.

A discharge hose (both not shown) of a paint pump is connected to the lower end of the support pipe 1 through an operating grip to supply the support pipe 1 with paint. The paint supplied to the support pipe 1 flows to the discharge pipe 3 via the shaft pipe 2,
The space is discharged from the discharge hole 4 of the discharge pipe 3 to the space portion (a) between the cutout portion 3a and the cylindrical core 8a, the space portion (a) is filled, and the main body flows from the cylindrical core 8a into the main body 8b. Exudates on the surface of 8b. As a result, the roller 8 is brought into contact with the surface to be coated (not shown) to roll, and the paint that has exuded to the surface of the main body 8b is attached to the surface to be coated.

[0004]

In the above-mentioned conventional one, the amount of the coating material discharged from the discharge hole 4 formed in the discharge pipe 3 is at the base (right side in FIG. 9) side of the discharge pipe 3 where the pressure becomes high. The number of the discharge holes 4a is larger than that of the discharge holes 4b on the tip side. For this reason, there has been a drawback that the paint exuding from the outer surface of the main body 8b becomes non-uniform, the paint adhering to the surface to be coated becomes non-uniform, and the color of the surface to be coated becomes shaded. Further, if the diameter of the discharge hole 4a on the base side is made smaller than the diameter of the discharge hole 4b on the tip side in order to eliminate the unevenness of the exudation of the paint, the discharge hole 4b on the small diameter side is likely to be clogged. There are drawbacks. The above-mentioned clogging of the discharge hole 4 and non-uniform leaching from the outer surface of the main body 8b become noticeable when a high-viscosity paint is used. It is an object of the present invention to obtain a novel bleeding type coating roller that solves the above drawbacks.

[0005]

The present invention is configured as follows to achieve the above object. That is, a discharge pipe having a discharge hole formed in the peripheral wall and having a closed end is connected to the end portion of a support pipe for sending out paint, and a cylindrical water-permeable roller is fitted into the discharge pipe, Providing caps at both ends of the axial center of the
In a bleeding type coating roller in which the cap is rotatably supported at both ends of the discharge pipe, the discharge hole of the discharge pipe is formed by an elongated slit in the axial direction, and the opening area of the discharge hole by the slit is In this structure, the tip end side of the discharge pipe is formed larger than the base side. It is preferable that at least one slit is formed on the base side of the discharge pipe, and the number in the circumferential direction is gradually increased toward the tip side of the discharge pipe. Further, the slit may be formed to have a width gradually increasing from the base side of the discharge pipe to the tip side.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a II-II sectional view thereof. In FIG. 1, 1
Reference numeral 0 denotes a bleeding type coating roller, which has a shaft tube 12 projectingly fixed to the upper end (tip part) of the support tube 11 connected to the pump side to the left, and having a small diameter on the left part of the shaft tube 12. Shaft 12a
To form. Disc-shaped support cap 1 on the right end of the shaft portion 12a
3 is rotatably fitted, and the discharge pipe 14 is extended leftward and fixed to the left portion of the shaft portion 12a by screwing. The discharge pipe 14 is made of a plastic material and has left and right end portions 14a,
4b is formed into a cylinder, and the intermediate portion 14c is formed into a hollow triangular prism shape as shown in FIG. 2, and a discharge hole, that is, a slit 15 extending in the axial direction is formed in the intermediate portion 14c.

As shown in FIGS. 3 to 5, the slit 15 has a first slit 15a on the first surface 14c-1 and a second slit 15b on the second surface 14c-2 of the intermediate portion 14c.
The third slit 15c is formed on the third surface 14c-3. As shown in FIG. 3, the first slit 15a has a first surface 14c.
-1 is extended over substantially the entire length of the second slit 15b.
4 is extended to the left half portion (tip side) of the second surface 14c-2 as shown in FIG. 4, and the third slit 15c is, as shown in FIG. 5, the left end portion of the third surface 14c-3. It is formed by extension at the tip. The groove width of each of the first slit 15a to the third slit 15c is equal to 2 mm.

As shown in FIG. 6, the slit 15 has a wedge-shaped slit 15d in the circumferential direction in the middle portion 14c of the discharge pipe 14 which gradually becomes wider from the right end (base) to the left end (tip). One or a plurality may be formed. Further, the cross-sectional shape of the intermediate portion 14c of the discharge pipe 14 is a hollow circle as shown in FIG. 7, a hollow ellipse with two left and right surfaces cut out as shown in FIG. May be a hollow square or a pentagon.

A cylindrical roller 20 is fitted on the outer circumference of the discharge pipe 14, the right end portion of which is press-fitted into the support cap 13, and the shaft portion 12 of the shaft pipe 12 is inserted through the support cap 13.
It is rotatably supported on a. Further, another disc-shaped support cap 18 is fitted and fixed to the left end portion of the roller 20, and the shaft center portion of this support cap 18 is rotatably fitted to a shaft pin 17 screw-connected to the left end portion of the discharge pipe 14. To combine. The right end of the shaft pin 17 is screwed into the left end of the discharge pipe 14 to close the left end of the discharge pipe 14, and a large-diameter flange 17a is formed at the left end, and the flange 17a supports the support. Prevent the cap 18 from coming off.

The roller 20 is constructed by fitting and fixing a water-permeable main body 20b such as sponge or felt on the outer periphery of a rigid cylindrical core 20a having a large number of small holes.
In FIG. 1, reference numeral 19 denotes a hose joint attached to the lower end of the support pipe 11, which connects the support pipe 11 to a discharge hose (not shown) of the paint pump.

According to the above-described embodiment, the paint supplied from the paint pump to the support pipe 11 passes through the shaft pipe 12 and the discharge pipe 1.
First slit 1 formed in the discharge pipe 14
5a, the second slit 15b, and the third slit 15c are discharged into the space portion (a) between the intermediate portion 14c and the cylindrical core 20a, and after filling the space portion (a), the fluid is circulated from the cylindrical core 20a into the main body 20b. Then, it exudes to the surface of the main body 20b. As a result, when the roller 20 is brought into contact with the surface to be coated (not shown) and is rolled, the paint exuded on the surface of the main body 20b adheres to the surface to be coated.

In this case, the first slit 15a is the discharge pipe 1
4 (the first surface 14c-1) over substantially the entire length, the second slit 15
b is the left half (tip side) of the discharge pipe 14 (second surface 14c-2), and the third slit 15c is the discharge pipe 14 (third surface 14).
Since it is formed at the left end (tip) of c-3),
The opening amount of the discharge portion of the discharge pipe 14 by each slit 15a to 15c gradually increases from the base portion (right portion) side where the pressure increases to the tip portion (left portion) side where the pressure decreases.
Therefore, the paint discharged from the discharge pipe 14 is discharged substantially uniformly from the entire length of the discharge pipe 14, and the paint uniformly exudes from the outer surface of the main body 20b. Further, since each of the slits 15a to 15c is elongated in the axial direction, even a high-viscosity paint is less likely to be clogged.

Further, as shown in FIG. 6, in the slit 15d where the groove width gradually increases from the base portion (right portion) side where the pressure becomes high to the tip portion (left portion) side where the pressure becomes low, the discharge pipe is formed. Since the opening amount of the discharge portion of 14 continuously changes from the base side where the pressure increases to the tip side where the pressure decreases, the paint is discharged more uniformly from the entire length of the discharge pipe 14.

[0014]

As is apparent from the above description, according to the present invention, the discharge hole of the discharge pipe is formed by the elongated slit in the axial direction, and the opening amount of the discharge hole is increased from the base side where the pressure increases to the tip end where the pressure decreases. Since it was gradually increased toward the side, the paint exudes substantially uniformly from the outer surface of the roller, and the paint can be evenly applied to the surface to be coated,
It has the effect of preventing clogging and stabilizing the coating performance.

[Brief description of drawings]

FIG. 1 is a sectional view of a coating roller showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a side view showing the relationship between the first surface and the first slit of the discharge pipe according to the present invention.

FIG. 4 is a side view showing the relationship between the second surface and the second slit of the discharge pipe according to the present invention.

FIG. 5 is a side view showing the relationship between the third surface and the third slit of the discharge pipe according to the present invention.

FIG. 6 is a side view showing a relationship between a discharge pipe and a slit according to another embodiment.

FIG. 7 is a sectional view showing a second embodiment of the sectional shape of the discharge pipe.

FIG. 8 is a sectional view showing a third embodiment of the sectional shape of the discharge pipe.

FIG. 9 is a sectional view of a coating roller showing a conventional example.

[Explanation of symbols]

 10 Coating Roller 11 Support Tube 12 Shaft Tube 12a Shaft 13 Support Cap 14 Discharge Pipe 14a Left End 14b Right End 14c Intermediate 14c-1 Intermediate First Surface 14c-2 Intermediate Second Surface 14c-3 Intermediate Third surface 15 Slit 15a First slit 15b Second slit 15c Third slit 17 Shaft pin 17a Flange 18 Support cap 19 Hose joint 20 Roller 20a Cylindrical core 20b Main body (a) Space part

Claims (3)

[Claims] 1. A discharge pipe having a tip closed and a discharge hole formed in a peripheral wall is connected to an end portion of a support pipe for sending out paint, and a cylindrical water-permeable roller is fitted to the discharge pipe. In the exudation type coating roller, which is inserted and provided with caps for closing both ends of the axial center of the roller, and rotatably supporting the caps on both ends of the discharge pipe,
A discharge type coating roller, characterized in that the discharge hole of the discharge pipe is formed by an elongated slit in the axial direction, and the opening area of the discharge hole by the slit is formed so that the tip side of the discharge pipe is larger than the base side. 2. The exudation mold according to claim 1, wherein at least one slit is formed on the base side of the discharge pipe, and the number in the circumferential direction is gradually increased toward the tip side of the discharge pipe. Painting roller. 3. The bleeding type coating roller according to claim 1, wherein the slit is formed so that the width gradually increases from the base side of the discharge pipe to the tip side thereof.