JP2802256B2 - C-shaped felt tube and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a C-shaped felt tube which can be easily fitted to an endless rod-like body such as a handrail or a pillar of a staircase, a bridge, a corridor or the like from which a cover cannot be removed, and a robust C-shaped tube. The invention relates to a method for economically producing shaped felt tubes.

[0002]

2. Description of the Related Art Railings such as stairs, bridges, corridors, and safety railings for buses and trains are completely fixed when an object to be mounted is built and manufactured, and cannot be removed or disassembled after installation. It is. These handrails are often bent into a U-shape. For example, even if a cylindrical urethane cover fitted to a safety handrail of a bus or a train is damaged, it cannot be replaced with the same one.

In order to attach a cushioning or non-slip cover to these handrails or pillars, at present, a pipe-shaped cover made of a soft plastic mainly provided with a slit in a vertical direction is used, and the pipe-shaped cover is fitted to an endless rod-shaped body. I agree. Since the fitting and fixing work of such a pipe-shaped cover is complicated, there is a case where an adhesive cloth tape or the like is simply wound around the endless rod-shaped body.

[0004]

Although a pipe-shaped cover with a slit can be relatively easily fitted into an endless rod-shaped body such as a handrail or a pillar, it is generally deformed and easily detached after being fitted. The same applies to the case where an adhesive tape is additionally wound around for fixing and reinforcing. In addition, it is generally not preferable to wind an adhesive cloth tape because the thickness of the tape is thin, so that the effect of cushioning and anti-slip is low.

The present invention has been proposed in order to improve the above-mentioned problems relating to the conventional handrail cover, and has a C-shape which can be easily fitted into an endless rod-like body from which the cover cannot be removed and can be firmly fixed. It is intended to provide a felt tube. Another object of the present invention is to provide a heat-resistant C-shaped felt tube used as a shock-absorbing cover to be fitted on a transport roller such as an extruded aluminum material. It is another object of the present invention to provide a method for quickly and economically producing multilayer, robust C-shaped felt tubes.

[0006]

In order to achieve the above-mentioned object, a C-shaped felt tube 1 according to the present invention has a longitudinal slit 2 as exemplified in FIGS. Although the felt tube 1 is usually cylindrical, it can also be formed into a rectangular cylinder such as a triangle or a quadrangle, or an irregular cylinder such as an ellipse. In FIG. 1, the felt tube 1 includes an inner shape-retaining felt portion 3 and an outer body-felt portion 5, and the shape-retaining felt portion 3 and the body-felt portion 5 are integrated in advance. 2, the felt tube 1 includes an inner shape-retaining resin portion 7 and an outer main-body felt portion 8, and the shape-maintaining resin portion 7 and the main body felt portion 8 are fused.

The applications of the felt tube 1 shown in FIG. 1 cover a wide range from a normal temperature to a considerably high temperature use environment by appropriately changing the fibers contained in the felt portions 3 and 5. A relatively large amount of heat-fusible fiber is mixed into the shape-retaining felt portion 3 in order to maintain the shape at the time of heat molding. The integration of the shape-retaining felt portion 3 and the main body felt portion 5 is generally performed by needling in the state of a sheet. A sheet or a fiber cloth may be interposed.

The application of the felt tube 1 shown in FIG. 2 is an operating environment from room temperature to about 50 ° C. The shape-retaining resin portion 7 is generally made of a thermoplastic resin film wound around the molding shaft 10 (FIG. 6), and is formed by melting the film. In this case, the main felt portion 8 contains a small amount of heat-fusible fibers that are melted by heating during the molding in order to maintain the shape during the preliminary molding.

In order to manufacture the felt tube 1 of FIG. 1, in FIG. 3, the sheet-shaped shaped felt portion 3 and the main body felt portion 5 are integrated by needle punching or the like. In FIG. 4, the integrated sheet material 12 is vertically wound around a molding shaft 14 such as a cylindrical shape subjected to a mold release treatment, and then formed into a cylindrical shape by applying pressure and heat from the outside. Allow to cool naturally. If the tube 1 to be manufactured is not cylindrical, a molding shaft having an outer shape corresponding to this is used.

The obtained tube material 16 has a portion 18 protruding in the vertical direction as shown in FIG. The protruding portion 18 is cut out along a cutting line 20 in the longitudinal direction, is further processed by applying pressure and heat from the outside, is cooled, and finally the shaping shaft 14 is extracted. If the inclination angle of the cutting line in the vertical direction is to be changed, the molding shaft 14 may be once extracted, cut in the vertical direction, and then inserted again.

In order to manufacture the felt tube 1 shown in FIG. 2, in FIG. 6, a band-shaped film 24 is wound around a molding shaft 10 which has been subjected to a mold release treatment in the same manner as above, and a band-shaped felt 26 is further formed on the film. Wind it in a ring until it has the specified thickness. Next, outside the obtained wrapping material 28, a cloth or paper material is wrapped or a paper cylinder 30 is fitted to keep the shape of the wrapping material cylindrical, and then the wrapping material is preformed into a cylindrical shape by heating, Thereafter, the molding shaft 10 is extracted while being air-cooled or naturally cooled.

A shaft 36 having a diameter smaller than that of the shaft 10 is inserted into the obtained tube material, and is then re-formed into a cylindrical shape having a smaller diameter by pressurizing and heating from the outside, followed by air cooling or natural cooling. The reshaped tube material 38 has a portion 40 that protrudes in the vertical direction as shown in FIG. The protruding portion 40 is cut out along the vertical cutting line 34 in the same manner as in FIG. 4, is further processed by applying pressure and heat from the outside, is cooled, and finally the small-diameter shaft 36 is extracted.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to manufacture the felt tube 1 shown in FIG.
And the main body felt part 5 are integrated by needle punching or the like. The shape-retaining felt part 3 is a felt obtained from card wrap which contains synthetic and / or natural fibers in an amount of 30 to 60% and heat-fusible fibers in an amount of 70 to 40%. On the other hand, the main felt portion 5 is made of one or more kinds of synthetic and / or natural fibers. If heat resistance is required, polyester fiber, aramid fiber, carbon fiber, flame-resistant fiber, blackened fiber, glass fiber, etc. Is used.

The shape-retaining felt portion 3 and the main body felt portion 5 may be integrated by needling in a sheet state, and may be further subjected to appropriate resin processing or compression processing. The integrated sheet material 12 has an overall thickness of 3 to 10 mm.
The shape-retaining felt portion 3 may have a thickness of about 1 mm.

In FIG. 4, the sheet material 12 is vertically wound around a cylindrical shaft body 14, and then a form (not shown) such as a half mold is fitted to the outside to press the sheet material 12 from outside. After passing through a hot blast stove heated to a high temperature in step (2) to melt the heat-fusible fibers in the shape-retaining felt portion 3 and form it into a cylindrical shape, air-cooling or natural cooling is performed. The molding shaft 14 is
In advance, the peripheral surface is subjected to Teflon processing (trade name), or a Teflon tape (trade name) is wound around and subjected to mold release processing.

The obtained tube material 16 has a portion 18 protruding in the vertical direction as shown in FIG. Next, the tube material 16 is caused to travel in the vertical direction, and the protruding portion 18 is continuously cut out along the cutting line 20 in the vertical direction. Further, a mold (not shown) is fitted to the outside of the tube material 16, pressurized and heated at a temperature slightly lower than the above-mentioned heating temperature, finish-processed, and after cooling, the molding shaft 14 is extracted.
By the finishing process, the vertical gap 2 as shown in FIG.
1 disappears and the felt fiber shrinks during heat molding,
The felt tube 1 having the slit 2 with no gap can be manufactured.

In general, in order to manufacture the felt tube 1 shown in FIG. 2 in which the use environment is around room temperature, in FIG. 6, a strip-shaped film 24 is formed on the molding shaft 10 that has been subjected to the mold release treatment in the same manner as described above. Then, the belt-like felt 26 is wound in an annular shape until it has a predetermined thickness. The film 24 serving as the shape-retaining resin portion 7 is made of a low-melting-point thermoplastic resin having a thickness of 0.2 to 0.3 mm, such as polyethylene, polypropylene, or nylon. On the other hand, the felt 26 serving as the main felt portion 8 is made of synthetic and / or natural fibers of 80 to 95.
%, And 5 to 20% of heat-fusible fiber, and is a felt obtained from card wrap which is uniformly mixed with the whole.

The wrapping material 28 has a paper cylinder 3
By fitting 0, the shape is maintained in a cylindrical shape. This winding material 28 is heated at a temperature higher than the melting point of the film 24,
The temperature is set so that the wound film 24 starts to melt after about 10 minutes. After heating until the fusion of the heat-fusible fibers in the film 24 and the felt 26 progresses to some extent, the wound material 28 is air-cooled or naturally cooled, and the shaping body 10 is pulled out. Obtain tube material.

The preformed tube material retains flexibility because the resin is not completely melted. A shaft body 36 having a considerably smaller diameter than the shaft body 10 is inserted into this tube material, and a mold (not shown) such as a half mold is fitted to the outside,
The mold is heated while being pressed from the outside using the mold. By this heating, the fusion of the heat-fusible fibers in the film 24 and the felt 26 further proceeds. As a result, the tube material 38 is remolded into a smaller diameter tube material 38, and thereafter, air-cooled or naturally cooled.

The reshaped tube material 38 has a portion 40 that protrudes in the vertical direction as shown in FIG. The protruding portion 40 is cut out along the vertical cutting line 34 as in FIG. 4, and a form (not shown) is fitted to the outside.
Finishing is performed by pressurizing and heating at a temperature slightly lower than the above-mentioned heating temperature, and after cooling, the small diameter shaft body 36 is extracted. As a result, the vertical gap 32 in the tube material 38 disappears, and the felt tube 1 having the slit 2 with no gap can be manufactured.

The felt tube 1 may be fixed by winding an adhesive metal tape (not shown) around both ends thereof, for example, after widening the slit 2 in the longitudinal direction and fitting it into an endless rod (not shown). Felt tube 1
Is compressed in the vicinity of the slit 2, so that the slit 2 does not enter the open state when fitted into an endless rod having a predetermined diameter. For mechanical parts such as aluminum extruded profiles and other transport rollers, it can be assumed that they cannot be removed from the machine main body due to the layout area, or that they have a structure that cannot be removed due to special functions in their usage. At this time, the C-shaped felt tube 1 is effective.

[0022]

Next, the present invention will be described based on embodiments. Example 1 In order to manufacture the felt tube 1 of FIG. 1, 50% of polyester fiber and 50% of polyester-based heat-fusible fiber (trade name: Melty, manufactured by Unitika) were mutually used as the shape-retaining felt portion 3. The card wrap obtained by blending is horizontally laminated, and the card wrap is made 1 mm thick by appropriate needling. On the other hand, as the main felt portion 5, a card wrap of 1.9 denier 100% carbon fiber (trade name: Pyromex, manufactured by Toho Rayon Co., Ltd.) is formed to a thickness of 6 mm by appropriate needling.

When the sheet-shaped shaped felt portion 3 and the main felt portion 5 are further integrated by needle punching or the like, a sheet material 12 (FIG. 3) having a thickness of 5 mm is obtained. As shown in FIG. 4, the sheet material 12 is wound longitudinally around a cylindrical molding shaft 14 having a diameter of 70 mm. Shaft 14 for molding
Is preliminarily subjected to Teflon processing (trade name) on its peripheral surface.

The sheet material 12 includes a mold (not shown)
Is pressurized from the outside by being fitted to the outside, and in this state, is passed through a hot blast stove heated to about 200 ° C. at a speed of 1 m / min to melt the polyester heat-fusible fiber in the shape-retaining felt portion 3. It is formed into a cylindrical shape and then air-cooled.

The obtained tube material 16 has a portion 18 protruding in the vertical direction as shown in FIG. The tube material 16 is caused to travel in the vertical direction at a speed of 1 m / min, and the protruding portion 18 is continuously cut by a cutter along a cutting line 20 in the vertical direction. As shown in FIG. 5, the tube material 16 is
Further, a mold (not shown) is fitted to the outside and
Finishing is performed by applying pressure and heating for 0 minutes, and after the air cooling, the molding shaft 14 is extracted. The obtained felt tube 1 is cut into a length of 26 cm with a diamond cutter or the like.

The felt tube 1 can be applied to a high-temperature use environment such as a conveying roller of an extruded aluminum material. When the longitudinal slit 2 in the tube 1 is pushed open, it can be easily fitted into the conveying roller attached to the bearing. Finally, heat-resistant adhesive tape is wound around both ends and fixed.

Example 2 In order to manufacture the felt tube 1 shown in FIG.
The m-thick strip-shaped polypropylene film 24 is separated from the molding shaft 10 having a diameter of 80 mm by a mold release treatment in the same manner as described above.
Wind in a loop. Further, a belt-like felt 26 is wound around the wound film 24 in an annular shape so as to have a thickness of 8 mm. This felt 26 is made of polyester fiber 9
Card wraps obtained by blending 0% and 10% of polyester heat-fusible fiber (trade name: Melty) with each other are horizontally laminated, and the card wrap is made 1 mm thick by appropriate needling. It is felt.

The wrapping material 28 has a paper cylinder 3
By fitting 0, the shape is maintained in a cylindrical shape. If this winding material 28 is heated at about 160 ° C. for about 30 minutes, the wound film 24 starts to melt after about 10 minutes.
After this heating, the wound material 28 is air-cooled, and
When 0 is removed, a tube material preformed in a cylindrical shape is obtained.

As shown in FIG. 8, a shaft 36 having a diameter of 70 mm is inserted into the preformed tube material, and a mold (not shown) is fitted to the outside of the tube material. Heat while applying pressure. This heating is performed at about 130 ° C. for 10 minutes. By this heating, the tube is reshaped into a cylindrical shape having a smaller diameter than the tube material.

The reshaped tube material 38 has a portion 40 protruding in the vertical direction as shown in FIG. Cut out the protruding portion 40 along the vertical direction as described above,
Further, a mold (not shown) is fitted to the outside and
After finishing by pressurizing and heating for 0 minutes, the small-diameter shaft body 36 is extracted after air cooling. The obtained felt tube 1 is cut into a predetermined size by a diamond cutter or the like.

The felt tube 1 shown in FIG. 2 can be applied to a normal-temperature use environment in a railing or a pillar such as a staircase, a bridge, a corridor or the like where a cover cannot be removed. The slit 2 in the longitudinal direction of the tube 1 is pushed open and fitted into a handrail or the like, and an adhesive tape is wound around both ends and fixed.

[0032]

The C-shaped felt tube of the present invention can be easily fitted into an endless rod-shaped body by widening the longitudinal slit. This felt tube can be widely applied from a normal temperature to a considerably high temperature use environment by appropriately changing the fiber contained in the felt portion. Therefore, this felt tube can be used not only in normal-temperature operating environments such as railings and pillars such as stairs, bridges and corridors where the cover cannot be removed, but also in high-temperature operating environments such as transport rollers such as aluminum extrusions. Applicable.

The C-shaped felt tube of the present invention can be easily fitted into an endless rod-like body and firmly fixed, and even if damaged, it can be easily replaced. This felt tube is
A thicker wall has a higher buffering and non-slip effect than a urethane tube, and is preferable in terms of aesthetics as compared with a case where an adhesive cloth tape is wound. Further, the method of the present invention is economically advantageous because a robust C-shaped felt tube can be rapidly manufactured with relatively few steps.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a C-shaped felt tube according to the present invention.

FIG. 2 is a schematic cross-sectional view showing a modification of the present invention.

FIG. 3 is a schematic cross-sectional view of a sheet material used for the tube of FIG.

FIG. 4 is a schematic cross-sectional view showing a tube material in FIG.

FIG. 5 is a schematic cross-sectional view showing the next stage of manufacturing the tube of FIG. 1;

FIG. 6 is a partial perspective view showing a state where a band-shaped film and a band-shaped felt are wound around a molding shaft.

FIG. 7 is a schematic cross-sectional view showing the preformed tube material in FIG.

FIG. 8 is a schematic cross-sectional view showing the reshaped tube material in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 C-shaped felt tube 2 Slit 3 Shape-retaining felt part 5 Body felt part 7 Shape-retaining resin part 8 Body felt part 10, 14 Shaping body 36 Reshaping body

Claims (6)

(57) [Claims] 1. A felt tube having a longitudinal slit for fitting into an endless rod-shaped body, comprising a relatively thin inner shape-retaining felt portion and an outer thicker body felt portion, and an inner shape-retaining felt portion. C-shaped felt tube in which the body and the outer body felt are integrated in advance by needle punching or the like. 2. A felt tube having a longitudinal slit for fitting into an endless rod-like body, comprising a shape-retaining resin portion on an inner side and a felt portion on an outer body, wherein an inner shape-retaining resin portion and an outer body. A C-shaped felt tube which is fused with a felt portion, and the main felt portion contains a small amount of heat-fusible fibers which are melted by heating during molding. 3. The tube according to claim 1, wherein after the slit is widened and fitted into the endless rod-shaped body, an adhesive metal tape is wound around both ends thereof and fixed. 4. A sheet-shaped shape-retaining felt portion and a main body felt portion are integrated by needle punching or the like, and the obtained sheet material is wound longitudinally around a molding shaft that has been subjected to a release treatment. After being formed into a cylindrical shape by pressure and heating, it is cooled, cut off the portion of the tube material that protrudes in the vertical direction, and then finished by further pressurizing and heating from outside, cooled, and the shaping body is extracted. Manufacturing method of C-shaped felt tube. 5. A thermoplastic resin film is wound around a molding shaft subjected to a mold release treatment, a felt is further wound around the film until the film has a predetermined thickness, preformed into a cylindrical shape by heating, and then cooled. Pull out the molding shaft,
Next, insert a shaft body smaller in diameter than the shaft body, cool it after reshaping it to a smaller diameter by applying pressure and heating from the outside, cut off the part of the tube material that protruded in the vertical direction, and further from the outside. A method of manufacturing a C-shaped felt tube, which finishes by pressurizing and heating, cools, and extracts a small diameter shaft body. 6. A thermoplastic resin film and a felt are wound around a molding shaft, and then a cloth or paper material is wound around the outside of the molding shaft, or a paper cylinder is fitted into the shaft to maintain the cylindrical shape, followed by heat molding. 6. The method of claim 5, wherein