JP2003062512A - Processing method for coating roller end part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the quality of an end face by preventing a space part from generating by preventing a discontinuous part from generating on a roller end part. SOLUTION: In forming a brush on the end face of the end part by blocking the roller end part in which the brush is provided on the outer periphery of a resin made cylindrical core tube, a heating process S1 in which one end part of a core tube is heated with a heater, a throttling process S2 in which the heated one end part of the core tube is pressured by a pressurizer from the outer periphery of the one end part to an axis side of the core tube, and the opening of the one end part is throttled and a throttle is formed, and an indentation process S3 in which a push rod is brought into press contact with the throttle and moved along the axis, and the throttle is pushed inside the core tube and closed are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing an end portion of a roller for painting which is a constituent element of a roller type applicator for applying paint such as paint, and more particularly to a method for painting an end portion of which is closed. The present invention relates to a method of processing a roller end portion.

[0002]

2. Description of the Related Art Conventionally, as a method for processing the end portion of this type of coating roller, there is, for example, the one described in Japanese Patent No. 2794274. As shown in FIG. 9, the conventional method of processing the end portion of the coating roller is such that, as shown in FIG. 9, one end portion 4 of the roller 1 in which a brush 3 is attached to the outer circumference of a cylindrical core tube 2 made of resin is closed to close the end portion 4 of the roller 1. In order to form the brush 3 on the end face, first, the heating step of heating the one end portion 4 of the roller 1 with the heater 7 (see FIG. 9).
(1)), a closing step of closing the one end 4 of the roller 1 heated by the heater 7 with the pressurizer P (FIG. 9 (2)), and a shaping step of adjusting the shape of the closed one end 4 (FIG. 9 ( 3)) and. According to the conventional method of processing the end portion of the coating roller, the one end portion 4 softened by the heater 7 is bent by the pressurizer P so that the tip end joins with the axis Y, and the shape of the bent portion is adjusted. Then, the closed end surface 12 is formed.

[0003]

By the way, according to the conventional method of processing the end portion of the coating roller, the end of the one end portion 4 of the roller 1 is spliced and closed.
The joint may be insufficient due to the difference in the length from the place where it is pressed and bent to the tip, and the joint may be separated by stress when curing,
In these cases, there is a problem that a discontinuous portion of the brush 3 is generated on the end surface 12 and a portion where the brush 3 becomes sparse appears, and the quality of the end surface 12 deteriorates. When such a problem occurs, unevenness of the coating is caused at the portion coated on the end face 12, recoating is required, and the efficiency of the coating work is impaired.

The present invention has been made in view of the above problems, and improves the quality of the end surface by suppressing the generation of discontinuous portions on the end surface of the roller and preventing the occurrence of sparse areas. Another object of the present invention is to provide a method for processing the end portion of the coating roller.

[0005]

In order to achieve such an object, the processing method of the end portion of the coating roller according to the present invention is
In a method of processing an end portion of a coating roller in which an end portion of a roller provided with a brush on an outer periphery of a tubular core tube made of resin is closed to form a brush on an end surface of the end portion, a heater is provided for one end portion of the core tube. And a heating step of pressing one end of the heated core tube from the outer periphery of the one end to the axis side of the core tube by a pressurizer to narrow the opening of the one end to form a throttle opening. And a pushing step of bringing the push rod into contact with the throttle port and moving the push rod along the axis to push the throttle port into the core tube to close it. When the throttle opening is formed at one end of the roller, and the push rod is brought into contact with the throttle opening and the one end is pushed in, the one end is crushed and embedded in the core tube. Since the formed squeezing port was pushed inside the core tube, the brushes that were collected as the squeezing port was formed are pushed in as they are, so that the overlapping part and the tip of the squeezing port do not appear on the end face, and Due to this, the brushes are closely joined. Therefore, it is possible to form the end surface without generating discontinuity of the brush.

If necessary, a support jig having a support end that is inserted from the other end of the core tube into the core tube and supports the one end narrowed inward by a predetermined dimension from the one end is used. And In the drawing step, when pressurizing one end of the core tube from the outer periphery of the one end to the axis side of the core tube with a pressurizer,
The supporting end acts as a fulcrum to identify the bending position of the core tube. Further, in the pushing step, the supporting end supports the bent portion and holds the shape of the bent portion.

Further, if necessary, a recess is formed in the center of the supporting end of the supporting jig so that the aperture portion to be pushed in by the push rod can be inserted. In the pushing step, since the surplus pushed resin portion enters the concave portion, the end face is formed flat, and the end face is further trimmed and molded.

Further, if necessary, in the pushing step, a cup-shaped molding cup having an insertion hole through which the push rod is movably inserted is used in the center, and the outer periphery of the one end is covered by the molding cup. One end is bent and formed. Since the bent portion is pressed according to the shape of the molding cup, the shape of the bent portion is kept constant and the molding is performed properly.

Further, the molding cup is configured to rotate as necessary. Since it is repeatedly formed by rotation, the shape of the bent portion can be adjusted.

Furthermore, if necessary, the pressurizer used in the drawing step can be moved to two positions, a pressurizing position for pressurizing the one end in an equiangular relationship and a separating position separated from the pressurizing position. The pressure piece is configured so that a gap is formed in the circumferential direction of the pressure piece and a space is formed at the axial line portion at the pressure position. When moving from the separated position to the pressurizing position, one end is sandwiched and squeezed in the circumferential gap, so that the one end is squeezed by forming creases corresponding to the number of the gaps. Further, at this time, since the void is formed in the axial line portion, the end surface of the one end is not closed. Therefore, the aperture portion is reliably formed.

Furthermore, if necessary, the above-mentioned pressure piece is provided so that the angular position of pressure can be varied. Since the pressing position can be changed, it is possible to apply a plurality of pressures to one end from different angles. By changing the pressing position and applying pressure a plurality of times, the shape of the squeezing opening can be formed into a tubular shape, and the brushes at one end can be gathered at one place to further increase the brush density by the push rod.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A method of processing an end portion of a coating roller according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The same components as those described above will be designated by the same reference numerals. As shown in FIG. 1, the method of processing the end portion of the coating roller includes a heating step S1, a drawing step S2, and a pressing step S3. As shown in FIG. 2 (1), the roller 1 processed here has a brush 3 on the outer circumference of a cylindrical core tube 2 made of resin.
A tape made of cloth provided with is screwed and cut into a predetermined length. In the processing of the end portion of the coating roller, as shown in FIG. 2B, the one end portion 4 which is inserted from the other end of the core tube 2 into the inside of the core tube 2 and which is narrowed inward by a predetermined dimension from one end is supported. A supporting jig 6 having a supporting end 5 was used. The support jig 6 is formed in a tubular shape, and a recess 6a is formed in the center. The outer periphery of the support end 5 has a shape along the inner side of the core tube 2, and the support end 5 is positioned so as to be located at a predetermined position inside the core tube 2.

In the heating step S1, the one end 4 of the core tube 2 is heated by the heater 7 to soften the one end 4. As shown in FIG. 3, at the time of heating, first, the heater 7 was inserted into the core tube 2 of the one end portion 4 and heated with respect to the roller 1 into which the support jig 6 was inserted. The heater 7 used was a cylindrical body having an eccentric axis X, and was eccentrically rotated to heat the inner surface of the core tube 2 at the melting temperature of the resin. The heating was done until the one end 4 was easily bent. Since the heater 7 is rotated by the eccentric axis X to heat it, the heater 7 is heated in order to heat the entire inner surface of the core tube 2 at one time.
It is possible to heat the inner surface of the core tube 2 by using the heater 7 having a diameter smaller than the inner diameter without adjusting the heat radiation surface of the core tube 2 to the inner diameter of the core tube 2.

In the drawing step S2, as shown in FIGS. 4 and 5, the one end 4 of the core tube 2 which is heated and softened is applied from the outer periphery of the one end 4 to the axis Y side of the core tube 2 by the pressurizer P. Press one end 4
The aperture is narrowed to form the aperture 8. The pressurizer P used here is configured to include four pressurizing pieces e that are movable to two positions, a pressurizing position A that pressurizes the one end portion 4 in an equiangular relationship and a separating position B that is separated from the pressing position A. At each pressurizing piece e, a gap a is formed in the circumferential direction of the pressurizing piece e (the pressurizing surface is formed into a curved surface) and a space b is formed on the axis Y. . This pressurizer P operates such that the pressure piece e moves from the outer peripheral direction 4 of the roller 1 toward the axis Y and the peripheral surfaces of the pressure pieces e come close to each other, and at that time, the gap between the pressure pieces e is increased. The object to be pressed is sandwiched between a and pressure is applied. At this time, since the space b is formed on the axis Y, the tip of the one end portion 4 is not closed, and the aperture portion 8 is reliably formed. Further, the pressurizer P is provided with the pressurizing piece e so that the angular position of pressurization can be changed. Specifically, the pressing piece e is rotatable by 360 degrees, and the pressing position A can be set arbitrarily. Here, the pressurization position A was changed and the pressurization was performed twice. FIG. 5 (1) shows the shape of the aperture 8 after the first pressurization. FIG. 5 (2) shows the shape of the aperture 8 after the second pressurization at the position where the pressurizing position A is rotated by 45 degrees. In FIG. 5, the brush 3 is not shown to clearly show the shape of the aperture 8. By performing the pressurization twice, the shape of the throttle opening 8 becomes a deflated cylindrical shape close to the axis Y. In this way, by shrinking the shape of the aperture portion 8, the pushing process of the one end portion 4 in the subsequent pushing step S3 is facilitated.

In the pushing step S3, as shown in FIG. 6, the push rod 9 is brought into contact with the throttle port portion 8 to move the push rod 9 along the axis Y to push the throttle port portion 8 into the core tube 2. Close up. The contact surface of the push rod 9 has an area sufficient to push the aperture 8. A cup-shaped molding cup 10 was used for pushing. The molding cup 10 is formed of two members in a lid shape so that the bent portions of the one end portion 4 come into contact with each other from the left and right. The contact surface has a curved surface, and an insertion hole 11 is formed at the center of the contact so as to include the aperture 8 when the contact is made. At the time of pushing, the molding cup 10 is rotated and brought into contact with the bent portion, the push rod 9 is pushed into the insertion hole 11, and the throttle opening 8 is pushed into the core tube 2 so as to be crushed. At this time, the aperture 8 is pushed in with the brush 3 in contact with the surface of the push rod 9. Therefore, since the formed squeeze port portion 8 is pushed into the core tube 2, the brushes 3 gathered together with the formation of the squeeze port portion 8 are pushed in as they are, so that the overlapping portion and the tip of the squeeze port portion 8 are formed. It does not appear on the end face 12 (FIG. 7), and the brush 3 is tightly joined by being pushed. Therefore, brush 3
It is possible to form the end face 12 without the occurrence of discontinuous points. Further, by rotating the molding cup 10 along the screwing direction of the tape, the tape is not frayed from the core tube 2 and the bent portion is repeatedly molded. Figure 7
As shown in (1), the place where it is pushed in (end face 12)
Becomes slightly flattened over time and becomes substantially flat. As shown in FIG. 7B, all the steps are completed by removing the support jig 6 from the core tube 2. The one end portion 4 of the roller 1 processed in this way becomes the end surface 12 in which the occurrence of discontinuous portions is suppressed and the non-sparse portion does not occur.
The quality of 2 is improved.

The resulting roller 1 is, as shown in FIG.
The rotating shaft 16 provided with the handle 15 is rotatably attached to the bearing portion 14 attached from the other end portion 13 side, whereby it can be used as an applicator. When this applicator is used, the handle 15 is gripped, the brush 3 is made to contain a paint or the like, and the roller 1 is rolled on the object to be applied to perform the application. When the corner portion is painted, if the processed end surface 12 is brought into contact with the corner portion, the corner portion can be painted evenly.

In the above embodiment, the pressurizer P has four pressurizing pieces e. However, for example, the pressurizing piece e has two and the pressurizing position A is changed to increase the number of pressurizations. Also by this, the drawing process S2 of the roller end can be performed.
Further, if the number of pressing pieces e is increased, the drawing step S2 can be performed by only one pressing.

[0018]

As described above, according to the method of processing the end portion of the coating roller of the present invention, the heating step of heating the one end portion of the core tube with the heater and the one end portion of the heated core tube are performed. From the outer periphery of the core tube to the axis side of the core tube with a pressurizer to squeeze the opening at one end to form the squeeze port, and a push rod abuts the squeeze port to move the push rod along the axis. Since it is configured by including a pressing step of pressing the squeeze port portion into the core tube to close it, the formed squeeze port portion is pushed into the core tube, and an overlapping portion of the brush caused by the formation of the squeeze port portion or The tip of the aperture will not appear on the end face,
The brushes are tightly joined by pushing. Therefore, it is possible to form the end surface without generating discontinuity of the brush.

Further, when a supporting jig having a supporting end which is inserted from the other end of the core pipe into the core pipe and supports one end which is narrowed inward by a predetermined dimension from one end is used, the core is When pressurizing one end of the pipe from the outer circumference of the one end to the axial side of the core pipe by the pressurizer, the supporting end acts as a fulcrum to identify the bending position of the core pipe, and in the pushing step,
Since the supporting end supports the bent portion and can hold the shape of the bent portion, the shape of the end face can be maintained.

Further, in the case of forming a concave portion in the center of the supporting end of the supporting jig, into which the throttle opening pushed by the push rod can be inserted, the excessive pushed resin portion enters the concave portion, so that the end surface becomes flat. As a result, the end face can be shaped further.

Furthermore, in the pushing step, when the one end portion which covers the outer periphery of the one end portion is bent and formed by the shaping cup using the cup-shaped shaping cup having the insertion hole through which the push rod is movably inserted, is formed. Since the bent portion is pressed following the shape of the forming cup and the shape is kept constant, the end face can be shaped.

When the forming cup is rotated, the end face is repeatedly formed by the rotation, so that the shape of the bent portion can be adjusted.

Further, the pressurizer used in the drawing step is provided with a plurality of pressurizing pieces that can be moved to two positions, a pressurizing position for pressurizing one end in an equiangular relationship and a separating position separated from the pressurizing position. At the same time, when each pressurizing piece is configured such that a gap is formed in the circumferential direction of the pressurizing piece at the pressurizing position and a void is formed on the axis, when moving from the separated position to the pressurizing position. Since one end is sandwiched and squeezed in the gap in the circumferential direction, the one end is squeezed with creases corresponding to the number of gaps, and since there is a space at the axial location, the end face of the one end is closed. Since it is kept in the closed state, it is possible to surely form the aperture portion.

Furthermore, when the pressurizing piece is provided so that the angular position of pressurization is variable, it is possible to pressurize a plurality of ends at different angles. Thus, the shape of the squeezing port can be formed into a tubular shape, the brushes at one end can be gathered at one place, and the brush density can be further increased by pushing the push rod.

[Brief description of drawings]

FIG. 1 is a flowchart of a method for processing a coating roller end portion according to an embodiment of the present invention.

FIG. 2 shows a roller to be processed by a method of processing an end portion of a coating roller according to an embodiment of the present invention, (1) is a sectional view of the roller, and (2) is a supporting jig. It is sectional drawing of a roller.

FIG. 3 is a diagram illustrating a heating step of the method for processing the end portion of the coating roller according to the embodiment of the present invention.

FIG. 4 is a view showing a state in which the pressurizer is in a separated position in the drawing step of the method for processing the end portion of the coating roller according to the embodiment of the present invention, and FIG. It is a figure which shows the state of a pressure position.

FIG. 5 is a plan view showing the shape of the squeezing opening portion at the time of the first pressurization, showing the squeezing opening portion in the drawing step of the method for processing the end portion of the coating roller according to the embodiment of the present invention. Yes,
(2) is a plan view of the shape of the aperture part at the time of the second pressurization.

FIG. 6 shows a pushing step of the method for processing the coating roller end portion according to the embodiment of the present invention, (1) is a diagram showing a state before pushing, and (2) shows a state at the time of pushing. It is a figure.

FIG. 7 is a cross-sectional view of a roller obtained by the method for processing the end portion of the coating roller according to the embodiment of the present invention.

FIG. 8 is a diagram showing an example of a coating tool using a roller obtained by the method for processing the end portion of the coating roller according to the embodiment of the present invention.

FIG. 9 shows a conventional method for processing the end portion of a coating roller,
(1) is a figure explaining a heating process, (2) is a figure explaining a closing process, (3) is a figure explaining a shaping process.

[Explanation of symbols]

S1 heating process S2 drawing process S3 pushing process P presser e Pressure piece X eccentric shaft Y axis A pressure position B spaced position a gap b empty space 1 roller 2-core tube 3 brushes 4 one end 5 Support edge 6 Support jig 6a recess 7 heater 8 aperture 9 push rod 10 Molding cup 11 insertion holes 12 end faces

Claims (7)

[Claims] 1. A method for processing an end portion of a coating roller, which comprises closing an end portion of a roller provided with a brush on the outer periphery of a cylindrical core tube made of resin and forming a brush on the end surface of the end portion, wherein the core tube A heating step of heating one end of the core tube with a heater, and pressurizing the one end of the heated core tube from the outer periphery of the one end to the axial side of the core tube with a pressurizer to narrow the opening of the one end And a pushing step of bringing the push rod into contact with the throttle port portion and moving the push rod along the axis to push the throttle port portion into the core tube to close it. A method for processing the end portion of the coating roller, characterized by. 2. A support jig having a support end that is inserted from the other end of the core tube into the core tube and that supports the one end portion that is narrowed inward from the one end by a predetermined size is used. The method for processing the end portion of the coating roller according to claim 1. 3. The processing method for the end portion of the coating roller according to claim 2, wherein a recessed portion into which a throttle opening pushed by the push rod can be inserted is formed in the center of the support end of the support jig. . 4. In the pushing step, a cup-shaped molding cup having an insertion hole through which the push rod is movably inserted is used in the center, and the outer periphery of the one end is molded by the molding cup. The method for processing the end portion of the coating roller according to claim 1, 2, or 3. 5. The method for processing an end portion of a coating roller according to claim 4, wherein the forming cup is rotated. 6. A plurality of pressurizers arranged in an equiangular relationship so that the pressurizer used in the drawing step can be moved to two positions, a pressurizing position for pressurizing the one end and a separating position separated from the pressurizing position. It is characterized in that it is configured to include a piece, and that each pressure piece is configured such that a gap is formed in the circumferential direction of the pressure piece at the pressure position and a space is formed at an axial line portion. The method for processing the end portion of the coating roller according to claim 1, 2, 3, 4 or 5. 7. The method of processing an end portion of a coating roller according to claim 6, wherein the pressing piece is provided so that an angular position of pressing can be changed.