JP3587130B2 - Cylindrical body holding device for manufacturing ring-shaped reinforcing fiber base material, device for manufacturing ring-shaped reinforcing fiber base material, and method for manufacturing ring-shaped reinforcing fiber base material - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a tubular body holding device used to manufacture a reinforcing fiber base having a ring shape from a tubular body formed by weaving or knitting yarn. In addition, the present invention relates to an apparatus and a method for manufacturing a reinforcing fiber base having a ring shape by using the apparatus . The reinforcing fiber base material is suitable to be impregnated with a resin to form a resin molded body, for example, a toothed component of a resin gear.
[0002]
[Prior art]
As a reinforcing fiber base material for forming a tooth portion of a resin gear, a tubular body in which aramid fiber yarn is woven or knitted has been proposed (Japanese Patent Application Laid-Open No. 8-156124). As shown in FIG. 4, this cylindrical body 11 is provided in the manufacture of a gear as a reinforcing fiber base material 1 which is arranged in a ring shape by winding up in an axial direction. The reinforcing fiber base and a metal bush arranged at the center of the reinforcing fiber base are accommodated in a molding die, and the liquid resin injected into the molding die is impregnated into the reinforcing fiber base to integrally mold (injection molding). ). For example, as shown in FIG. 5, a reinforcing fiber substrate 1 in which the cross section of the ring is preliminarily formed into a rectangular shape after being arranged in a ring shape is overlapped in two steps in a molding die 3, and a metal bush 2 is disposed in the center. To close the molding die 3. The reinforcing fiber base material 1 is compressed and deformed by the pressure at the time of closing the molding die 3 to conform to the shape of the metal bush 2. Then, the inside of the molding die is brought into a reduced pressure state (1300 Pa), and a liquid resin (crosslinked polyaminoamide, epoxy resin, polyimide, or the like) is injected, penetrated into the reinforcing fiber base material 1, and cured by heating. Thereafter, teeth are formed by cutting around the resin molded body portion including the reinforcing fiber base 1 to complete the resin gear.
This resin gear is preferable because the reinforcing fiber base has a seamless ring shape, so that the strength of each part around the gear is uniform.
[0003]
[Problems to be solved by the invention]
It is desirable that the above-mentioned reinforcing fiber base material arranged in a ring shape is one obtained by winding a cylindrical body densely without forming wrinkles. The dense reinforcing fiber base material without wrinkles is suitable for producing a resin molded body having uniform strength at each part and high strength.
The problem to be solved by the present invention is to roll up a tubular body formed by weaving or knitting a yarn in the axial direction, and to manufacture a reinforcing fiber base material whose shape is arranged in a ring shape. It is to do. Another object of the present invention is to efficiently perform winding. The present invention provides a cylindrical body holding device used for manufacturing a ring-shaped reinforcing fiber base, a manufacturing apparatus and a manufacturing method of a ring-shaped reinforcing fiber base using the cylindrical body holding device.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, a tubular body holding device according to the present invention includes a plurality of cross-section arc-shaped members that are assembled to form a cylinder, and a radial moving unit that moves the cross-section arc-shaped member radially. Prepare. The arc-shaped member has a non-slip surface on the outer peripheral surface. Further, the radial moving means expands / reduces the diameter of a cylinder formed by assembling the circular arc-shaped members, and at least determines the outer diameter at which the inner surface of the cylindrical body extrapolated to the cylinder closely contacts the cylindrical body. The above-mentioned expansion / reduction is performed between the outer diameter and the outer diameter for expanding the diameter.
[0005]
Using the tubular body holding device as described above, a reinforcing fiber base arranged in a ring shape is manufactured as follows.
First, a tubular body formed by weaving or knitting a yarn is extrapolated in a state where the inner surface of the tubular body is in close contact with the cylinder of the tubular body holding device. At this time, since the inner surface of the tubular body is in close contact with the outer peripheral surface of the arc-shaped member in cross section, an extrapolation operation without forming wrinkles on the peripheral surface can be easily performed. Thereafter, the outer diameter of the cylinder is expanded to improve the adhesion between the inner surface of the cylindrical body and the outer peripheral surface of the arc-shaped member. By increasing the adhesion, the wrinkles of the cylindrical body are sufficiently extended, and thereafter, it becomes difficult to form wrinkles. Further, the frictional force between the inner surface of the cylindrical body and the outer peripheral surface of the arc-shaped member also increases.
Next, using the cylinder of the cylindrical body holding device as a guide, the cylindrical body is wound up from one end thereof. This winding gradually forms a ring on the outer periphery of the cylinder. The cylindrical body that is in close contact with the outer peripheral surface of the arcuate member has a large frictional force with the outer peripheral surface of the arcuate member, so that it is difficult to move, and can be densely wound without any wrinkles.
In this way, the tubular body is rolled up from one end to the other end to produce a ring-shaped reinforcing fiber base material.
[0006]
The above winding may be manual, but due Rukoto to adding means wound into tubular body holding device, can be automated winding. For example, the winding means is constituted by the following elements (a) and (b).
The element (a) is a band-shaped body or a string-shaped body located in a substantially U-shape in a gap between adjacent arc-shaped members in cross section. One side of the substantially U-shape is located inside the cylinder, and the other side is located outside the cylinder.
The element (b) is a band-shaped or string-shaped operating member. The operating member moves the substantially U-shaped top along the gap by changing the length of the band or the string in the inner region of the cylinder and the length in the outer region of the cylinder.
[0007]
When carrying out the winding operation by the device provided with the winding means, one end of the cylindrical body extrapolated to the cylinder is brought into contact with the inside of the substantially U-shaped top of the band or string. By changing the length of the band or string in the inner region of the cylinder and the length of the outer region of the cylinder so as to increase the length in the outer region of the cylinder, the substantially U-shaped top moves along the gap, Along with the movement, a force is generated inside the substantially U-shaped top so as to wind up one end of the cylindrical body in contact with the top. The substantially U-shaped top acts to roll the end of the tubular body outward due to the inner movement thereof, and moves along the gap while holding the ring formed inside the substantially U-shaped top.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a state in which the tubular body 11 is extrapolated to the cylinder 4 of the tubular body holding device, and the tubular body 11 is wound up from one end. The tubular body 11 is formed by weaving or knitting aramid fiber yarn or other yarn suitable as a reinforcing material into a tubular shape.
The cylinder 4 is formed by assembling six arc-shaped members 41 made of an aluminum alloy, and an outer peripheral surface of the arc-shaped member 41 is provided with a non-slip 42 by knurling. There is a gap 43 between adjacent circular arc-shaped members 41 constituting the cylinder 4. At the lower end of each circular arc-shaped member 41, a radial moving means 5 for moving the circular cross-sectional member 41 radially is provided. Have. The radial moving means 5 is, for example, a cylinder-piston mechanism or a servo mechanism. The radial moving means 5 expands / contracts the diameter of the cylinder 4 by moving the arc-shaped member 41 forward and backward in the radial direction. The expansion / reduction is performed at least between the outer diameter at which the inner surface of the tubular body 11 extrapolated to the cylinder 4 is in close contact and the outer diameter at which the diameter of the tubular body 11 is further expanded.
[0009]
Next, a process of manufacturing the reinforcing fiber base material in which the cylindrical body 11 is wound up from one end by using the above-described cylindrical body holding device and arranged in a ring shape will be described.
The outer diameter of the cylinder 4 is adjusted so that the inner surface of the cylindrical body 11 is in close contact, and the cylindrical body 11 is extrapolated from above the cylinder 4. Then, the diameter of the cylinder 4 is expanded, and the inner surface of the cylindrical body 11 is strongly adhered to the outer peripheral surface of the arcuate member 41 in cross section, thereby improving the adhesion. The cylindrical body 11 has its surface wrinkled and is firmly held by the cylinder 4. In this state, the cylindrical body 11 is wound up from the lower end so that the ring 12 is formed on the outer peripheral side using the cylinder 4 as a guide. At this time, a force is exerted on the cylindrical body 11 to shift upward. However, since the frictional force between the inner surface of the cylindrical body 11 and the outer peripheral surface of the arcuate member 41 is large, the cylindrical body 1 is firmly held by the cylinder 4 without displacement. The force applied to the lower end of the cylindrical body 11 must act only in the direction in which the cylindrical body 11 is wound up, whereby the cylindrical body 11 can be wound up densely without wrinkling the ring 12. .
[0010]
After winding up to the end, the diameter of the cylinder 4 is reduced and the ring-shaped reinforcing fiber base is taken out. Alternatively, while the diameter of the cylinder 4 is not reduced, the same operation as the winding is continued after the completion of the winding, and the reinforcing fiber base material arranged in a ring shape is extracted from the upper end of the cylinder 4. As shown in FIG. 1, if the outer peripheral surface of the upper end of the cylinder 4 is tapered with a taper 44, the above-mentioned extraction is facilitated, and the operation of extrapolating the cylindrical body 11 to the cylinder 4 from above. Will also be easier.
[0011]
FIGS. 2A and 2B show a manufacturing apparatus in which a cylindrical body winding means is added to the apparatus described with reference to FIG.
The winding means is composed of a band-shaped or string-shaped body 61 arranged in a substantially U-shape in each of the gaps 43 between the adjacent arc-shaped members 41 in cross section, and an operating member 63 of the band-shaped or string-shaped body 61. The band-shaped body or the string-shaped body 61 has one side substantially U-shaped fixed to the inside of the cylinder and the other side attached to the operating member 63 located outside the cylinder. The operation member 63 is a means for lifting and lowering the belt-like body or the string-like body 61 located outside the cylinder along the cylinder 4. By this means, the length of the band or string 61 in the inner and outer regions of the cylinder changes, and the substantially U-shaped top 62 of the band or string 61 moves along the gap 43.
The embodiment shown in FIGS. 2A and 2B employs a pulley that moves up and down along the cylinder 4 as the operation member 63. By fixing the end of the band or the string 61 in the outer region of the cylinder and operating the band or the string 61 on a pulley, the moving amount of the substantially U-shaped top 62 is twice the moving amount of the pulley. can do. This is convenient for reducing the size of the device because the amount of movement of the pulley is small. FIG. 3 shows details of the operating member 63 employing a pulley. The operating member 63 has a structure in which a radial projection is provided on a support member 64 and a pulley 65 is attached to the radial projection. The main body of the support member 64 is inside the cylinder 4, but the radial projections protrude outside the cylinder 4 from each of the gaps 43 between the adjacent arc-shaped cross-section members 41. A ball screw 66 penetrates the center of the support member 64, and when the ball screw 66 is driven, the support member 64 moves up and down along the cylinder 4 using the gap 43 as a guide, and a band or string 61 on a pulley 65. Is operated.
[0012]
A process of manufacturing a reinforcing fiber base material in which the cylindrical body 11 is arranged in a ring shape from the cylindrical body 11 using a manufacturing apparatus to which the above-described means for winding the cylindrical body is added will be described below.
First, the tubular body 11 is extrapolated to the cylinder 4, and this step is as described with reference to FIG. At this time, the substantially U-shaped top 62 of the band-shaped or string-shaped body 61 is located below the lower end of the tubular body 11 as shown in FIG. Next, when the band or string 61 in the outer region of the cylinder is pulled up, the lower end of the cylindrical body 11 contacts the inside of the substantially U-shaped top 62. As described with reference to FIG. 3, this lifting operation is performed by placing the belt-like body or the string-like body 61 on the pulley 65 and raising the support member 64.
Further, by pulling up the band-shaped body or the string-shaped body 61, the length of the outer region of the cylinder becomes longer. Along with this, the operation of winding the cylindrical body 11 outward from the lower end thereof with the cylinder 4 as a guide is started. At this time, the inner surface of the cylindrical body 11 is in close contact with the outer peripheral surface of the arcuate member 41, and is firmly held by the frictional force. Therefore, the entire cylindrical body 11 does not shift along the cylinder 4 and the movement of the belt-shaped body or the string-shaped body 61 inside the substantially U-shaped top portion 62 induces the winding, so that the winding starts naturally. When the winding of the tubular body 1 advances a little, a wound ring 12 is formed on the outer periphery of the cylinder 4 as shown in FIG. The inside of the substantially U-shaped top 62 of the band or string 61 holds the ring 12, and the movement of the inside of the substantially U-shaped top 62 caused by pulling up the band or string 61 centers on the ring 12. By promoting the winding, it is possible to smoothly carry out a precise winding work without wrinkles.
[0013]
It is preferable to increase the frictional force on the inside of the band or string 61 arranged in a substantially U-shape. This is because the inside of the substantially U-shaped top portion 62 holding the ring 12 firmly captures the ring 12 and efficiently advances the winding around the ring 12. In the case of a belt-like body, its surface is roughened, and in the case of a string-like body, it is preferable to form a braid so that the surface has irregularities.
[0014]
As shown in FIGS. 2A and 2B, the band or string 61 is passed through the weight 67 inside the cylinder so that the weight 67 can freely move the band or string 61. The weight 67 always stays near the substantially U-shaped top 62. The weight 67 applies tension to the band or string 61, which is convenient for forming the substantially U-shaped top 62. One weight 67 is arranged in the inner region of the cylinder, and passes each band or string 61 through this. This is convenient for aligning each of the substantially U-shaped tops 62 at the same height.
[0015]
【The invention's effect】
As described above, according to the present invention, it is possible to efficiently and smoothly manufacture a reinforcing fiber base obtained by preparing a cylindrical body into a ring shape.
The ring-shaped reinforcing fiber base material is dense without any wrinkles, and is suitable for forming a resin molded product having uniform strength over the entire circumference.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an embodiment of a tubular body holding device according to the present invention;
FIG. 2 is an explanatory view showing an embodiment of the manufacturing apparatus according to the present invention in which a means for winding up a tubular body is added to the tubular body holding device .
FIGS. 3A and 3B are explanatory views showing a means for winding a cylindrical body provided in the manufacturing apparatus in the embodiment of the manufacturing apparatus according to the present invention, wherein FIG. 3A is a top view and FIG. FIG. 4 is an explanatory diagram viewed from a cross section taken along line AA ′ of FIG.
FIG. 4 is an explanatory view showing a process of winding up a cylindrical body from an end to produce a ring-shaped reinforcing fiber base material.
FIG. 5 is an explanatory cross-sectional view showing a state in which a resin gear is formed using a reinforcing fiber base arranged in a ring shape.
[Explanation of symbols]
1 is a reinforcing fiber substrate 11, a cylindrical body 12, a ring 2, a metal bush 3, a molding die 4, a cylinder 41, an arc-shaped member 42, a non-slip 43, a gap 44, a taper 5 and a radial moving means 61. Is a belt-like state or a string-like body 62 is a substantially U-shaped top 63 is an operating means 64 is a support member 65 is a pulley 66 is a ball screw 67 is a weight

Claims (4)

A tubular body holding device used for manufacturing a reinforcing fiber base material in which a tubular body formed by weaving or knitting a yarn is wound up in an axial direction from an end thereof and arranged in a ring shape,
The apparatus includes a plurality of arc-shaped cross-section members that are assembled to form a cylinder, and a radial moving unit that advances and retreats the cross-section arc-shaped member in the radial direction.
The cross-section arc-shaped member has a non-slip on the outer peripheral surface,
The radial moving means expands / contracts a diameter of a cylinder formed by assembling the plurality of arc-shaped members, and at least determines an outer diameter at which the inner surface of the cylindrical body extrapolated to the cylinder is in close contact with the cylinder, and A tubular body holding device for producing a ring-shaped reinforcing fiber base material, wherein the expansion / reduction is performed between the outer diameter of the body and the outer diameter of the body . An apparatus for manufacturing a ring-shaped reinforcing fiber base, comprising a tubular body holding device according to claim 1 and winding means for winding a tubular body extrapolated into a cylinder in an axial direction from an end thereof. 3. The apparatus for producing a ring-shaped reinforcing fiber base according to claim 2, wherein the winding means comprises the following elements (a) and (b).
(A) In a gap between adjacent arc-shaped members having a cross-section, a band or a string positioned substantially in a U-shape such that one side of a substantially U-shape is in the inner region of the cylinder and the other side is in the outer region of the cylinder. An operating member of a band or a string which moves a substantially U-shaped top along a gap by changing a length of a body or a string in an inner region of a cylinder and a length of an outer region of the cylinder. A tubular body formed by weaving or knitting a yarn is extrapolated in a state where the inner surface of the tubular body is in close contact with the cylinder of the tubular body holding device according to claim 1, and thereafter, the outer diameter of the cylinder is expanded to extend the cylindrical body. A ring-shaped reinforcing fiber base characterized by enhancing the adhesion between the inner surface of the cylindrical body and the outer peripheral surface of the circular arc-shaped member, and winding up the externally inserted cylindrical body from one end to the outside using a cylinder as a guide. The method of manufacturing the material.

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