JPH09244446A - Structure for fitting resin parts and fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the fitting structure of resin parts and a fixing device by which the welded line of resin parts is prevented from being cracked by fitting the resin parts so that the welded line thereof is not brought into contact with the outside circumferential surface part of the shaft part of a heat roller. SOLUTION: This device is provided with a gear 85 constituted of the plural kinds of resin hardened and molded after it is injected from the plural injection ports of a mold in a fused state and joined and provided with a hole part 85a at the central part and the heat roller 81 to which the gear 85 is fitted by inserting the intermittently heated shaft 81a thereof in the hole part 85a of the gear 85. Then, the gear 85 is fitted so that the end part of the joined surface of the plural kinds of resin faced to the inside circumferential surface of the hole part 85a is not brought into contact with the outside circumferential surface of the shaft part 81a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin component mounting structure and a fixing device applied to, for example, a copying machine.

[0002]

2. Description of the Related Art A copying machine is provided with a fixing device for heating and fixing an image transferred onto a sheet. The fixing device includes a heat roller and a press roller that is in pressure contact with the heat roller, and an image is fixed by passing a sheet between the heat roller and the press roller.

A gear (or a pulley) forming a drive system is attached to the shaft portion of the heat roller by inserting the shaft portion into the hole. Heat-resistant polyphenylene sulfide (P-PPS), polyamide imide (PAI), or the like is used as a resin material for a molding material such as a gear that drives the fixing device.

By the way, the resin gear and the like are formed by the pin gate method or the film gate method. The pin gate method is a method in which molten resin is simultaneously injected from a plurality of injection ports of a molding die to be cured and molded. The molten resin injected from the plurality of injection ports of the molding die spreads inside the molding die and is bonded to each other. Therefore, after curing, a joining surface portion, that is, a weld line is generated in the gear.

[0005]

However, in the prior art, since the end of the weld line facing the inner peripheral surface of the hole of the gear was in contact with the outer peripheral surface of the metal shaft of the heat roller, the power was turned on. At times, the ends of the weld lines directly received heat of 180 ° to 210 ° C from the shaft of the heat roller.

For this reason, a crack is generated in the weld line of the gear, and when the crack grows, it eventually breaks and the driving force cannot be transmitted. Recently, a device with a long life has been manufactured, and the parts thereof have a long life. Therefore, damage due to cracks causes a large loss.

As a method of molding the resin gear, there is a film gate method in addition to the pin gate method. In the film gate method, since weld lines are less likely to occur, cracks are less likely to occur, but there are disadvantages that the film gate portion is cut off and the cost of the molding machine, the mold, etc. becomes high.

Therefore, according to the present invention, by mounting the resin component without contacting the resin joint surface portion facing the inner peripheral surface portion of the hole of the resin component with the outer peripheral surface portion of the mounting portion, cracks are not generated in the resin joint surface portion. It is an object of the present invention to provide a resin component mounting structure and a fixing device.

[0009]

In order to solve the above-mentioned problems, the present invention provides a resin mold which is molded in a molten state after being injected in a molten state from a plurality of injection ports of a molding die. And a resin component having a hole in the center, and a mounting means for mounting the resin component by inserting a mounting portion that is intermittently heated into the hole of the resin component, the resin component The end of the joint surface portion of the resin injected from the plurality of injection ports facing the inner peripheral surface of the hole is attached to the outer peripheral surface of the attaching portion in a non-contact state.

According to a second aspect of the present invention, the resin is made of a resin which is injected in a molten state from a plurality of injection ports of a molding die in a molten state to be bonded and then hardened, and has a hole portion in the center thereof. A resin component having a protrusion on the peripheral surface and a hollow mounting portion that is intermittently heated are inserted into the hole of the resin component, and the protrusion on the inner peripheral surface of the hole is formed into the hollow shape. Mounting means for mounting the resin component by inserting the resin component into the through hole formed in the wall surface of the mounting portion, and the resin component is injected from the plurality of injection ports into the protrusion of the inner peripheral surface of the hole. The end of the bonded surface of the resin is exposed.

According to a third aspect of the present invention, the resin is made of a resin that is injected in a molten state from a plurality of injection ports of a molding die in a molten state and is then cured and molded, and has a hole portion in the center thereof. The resin component is provided with a recess in the peripheral surface portion, and a mounting means for mounting the resin component by inserting a mounting portion that is intermittently heated into the hole portion of the resin component, and the resin component The end portion of the joint surface portion of the resin injected from the plurality of injection ports faces the concave portion of the inner peripheral surface portion.

According to a fourth aspect of the present invention, the resin is made of a resin which is injected in a molten state from a plurality of injection ports of a molding die in a molten state and bonded and then hardened, and has a hole in the center thereof. A resin component having a protrusion and a recess on its peripheral surface and a hollow mounting portion that is intermittently heated are inserted into the hole of this resin component, and the protrusion on the inner peripheral surface of the hole is Attaching means for attaching the resin component by inserting the resin component into the through hole formed in the wall surface of the ring-shaped attachment portion, the resin component being provided in the protrusions and the recesses on the inner peripheral surface of the hole. The end portions of the joint surface portion of the resin injected from the inlet were exposed.

According to a fifth aspect of the present invention, there is provided a rotating member made of a resin, which is made of a resin which is injected in a molten state from a plurality of injection ports of a molding die in a molten state and is then cured and molded, and which has a hole portion in a central portion. A heat roller that inserts a shaft portion that is intermittently heated into the hole portion of the rotating member to attach the rotating member, and that rotates by the rotation of the rotating member to heat the material to be fixed. The member is attached in such a manner that the end of the joint surface portion injected from the plurality of resin injection ports facing the inner peripheral surface of the hole is in non-contact with the outer peripheral surface of the shaft portion.

According to a sixth aspect of the present invention, the resin is made of a resin which is injected in a molten state from a plurality of injection ports of a molding die in a molten state and is then cured and molded, and has a hole portion in a central portion thereof. A rotating member made of resin having a protruding portion provided on the peripheral surface portion and a hollow shaft portion that is intermittently heated are inserted into the hole portion of the rotating member, and the protruding portion of the inner peripheral surface portion of the hole portion is A heat roller which is inserted into a through hole formed in the wall surface of the hollow shaft portion to attach the rotating member, and which is rotated by the rotation of the rotating member to heat and fix an object to be fixed, The rotating body faces the end of the joint surface portion of the resin injected from the plurality of injection ports to the protrusion on the inner peripheral surface portion of the hole.

According to a seventh aspect of the present invention, the resin is made of a resin which is injected in a molten state from a plurality of injection ports of a molding die in a molten state and is then hardened and molded, and has a hole portion in the center thereof. A rotating member made of resin having a concave portion on the peripheral surface and a shaft portion that is intermittently heated is inserted into a hole portion of the rotating member to attach the rotating member, and the rotating member is rotated by rotation to be fixed. A heat roller for heating and fixing the body is provided, and the resin component exposes the end of the joint surface portion of the resin injected from the plurality of injection ports to the concave portion of the inner peripheral surface portion of the hole.

According to an eighth aspect of the present invention, it is made of a resin which is injected in a molten state from a plurality of injection ports of a molding die in a molten state and bonded and then hardened, and has a hole portion in the center thereof. A rotating member made of resin having a protrusion and a recess on the peripheral surface portion, and a hollow shaft portion that is intermittently heated are inserted into the hole portion of the rotating member, and the protrusion portion on the inner peripheral surface portion of the hole portion is inserted. A heat roller for inserting and fixing the rotating member by inserting the rotating member into a through hole formed in the wall surface of the hollow shaft, and rotating the rotating member to heat and fix the fixing target. In the rotating member, the protrusions and the recesses on the inner peripheral surface of the hole face the end portions of the joint surface portion of the resin injected from the plurality of injection ports, respectively.

According to the present invention, the resin component is attached to the mounting portion such that the resin joint surface portion facing the inner peripheral surface portion of the hole does not come into contact with the outer peripheral surface portion of the mounting portion. The occurrence of cracks in the joint surface portion is reduced.

According to a fifth aspect of the present invention, with respect to the shaft portion of the heat roller, the resin joint surface portion facing the inner peripheral surface portion of the central hole portion of the resin rotary member does not contact the outer peripheral surface portion of the shaft portion. By attaching to, the occurrence of cracks in the resin bonding surface portion is reduced.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to an embodiment shown in the drawings. FIG. 2 shows a digital copying machine. The digital copying machine is provided with an apparatus main body 10, in which the scanner 4,
An image forming unit 6 that functions as an image forming unit is provided.

On the upper surface of the apparatus main body 10, there is provided a control panel (not shown) and a document placing table 12 made of transparent glass on which an object to be read, that is, the document D is placed. Further, an automatic document feeder 7 (hereinafter referred to as ADF) for automatically feeding the document onto the document table 12 is provided on the upper surface of the apparatus body 10. This ADF7
The document D is disposed so as to be openable and closable with respect to the document table 12, and also functions as a document holder for bringing the document D placed on the document table 12 into close contact with the document table 12.

The ADF 7 includes a document tray 8 on which a document D is set, an empty sen 9 for detecting the presence or absence of a document, a pickup roller 14 for taking out the documents one by one from the document tray, and a paper feed roller 15 for conveying the taken out documents. It is provided with a pair of aligning rollers 16 for aligning the leading edge of the document, and a conveyor belt 18 arranged so as to cover almost the entire document placing table 12. The plurality of originals set upward on the original tray 8 are taken out in order from the bottom page, that is, the last page, are aligned by the aligning roller pair 16, and are placed on the original by the transport belt 18. The sheet is transported to a predetermined position on the table 12.

In the ADF 7, a reversing roller 20, a non-reversing sensor 21, a flapper 22, and a paper discharge roller 23 are arranged at the end opposite to the aligning roller pair 16 with the conveyor belt 18 interposed therebetween. The document D whose image information has been read by the scanner 4 described later is sent out from the document placing table 12 by the conveyor belt 18, and the reversing roller 20,
ADF 7 via flapper 22 and paper discharge roller 23
The document is discharged onto the document discharge unit 24 on the upper surface. When reading the back surface of the document D, the document D conveyed by the conveyor belt 18 by switching the flapper 22 is reversed by the reversing roller 20 and then conveyed again to a predetermined position on the document table 12 by the conveyor belt 18. To be

The scanner 4 provided in the apparatus body 10
Has a light source 25 such as a fluorescent lamp that illuminates the original D placed on the original placing table 12 and a first mirror 26 that deflects reflected light from the original D in a predetermined direction. The first mirror is attached to a first carriage 27 disposed below the document table 12. The first carriage 27 is movably arranged in parallel with the document table 12, and is reciprocated below the document table by a drive motor via a toothed belt (not shown) or the like.

A second carriage 28, which is movable in parallel with the document placing table, is disposed below the document placing table 12. The second mirror 28 has the first mirror 2
Second and third mirrors 30 and 31 for sequentially deflecting the reflected light from the document D deflected by 6 are attached at right angles to each other. The second carriage 28 is driven by the first carriage 27 by a toothed belt or the like that drives the first carriage 27, and at the same time, the original is placed at a speed half that of the first carriage. It is moved in parallel along the table 12.

Below the document table 12, the image forming lens 32 that focuses the reflected light from the third mirror 31 on the second carriage 28 and the reflected light that is focused by the image forming lens are received. And a CCD sensor 34 for photoelectric conversion. The imaging lens 32 is movably disposed via a drive mechanism in a plane including the optical axis of the light deflected by the third mirror 31, and moves the reflected light at a desired magnification by moving itself. Form an image. Then, the CCD sensor 34 photoelectrically converts the incident reflected light and outputs an electric signal for the read document D.

On the other hand, the image forming section 6 is provided with a laser exposure device 40 which functions as a latent image forming means. The laser exposure device 40 includes a semiconductor laser 41 as a light source, a polygon mirror 36 as a scanning member that continuously deflects the laser light emitted from the semiconductor laser 41, and a polygon mirror 36 that rotates at a predetermined rotation speed described later. A polygon motor 37 as a scanning motor for driving and an optical system 42 for deflecting the laser light from the polygon mirror and guiding it to a photosensitive drum described later are provided. The laser exposure apparatus 40 having such a configuration is fixed and supported by a support frame of the apparatus body 10 described later.

The semiconductor laser 41 is ON / OFF controlled according to the image information of the document D read by the scanner 4 or the facsimile transmission / reception document information, and this laser light is passed through the polygon mirror 36 and the optical system 42 to the photoconductor. An electrostatic latent image is formed on the peripheral surface of the photosensitive drum by scanning the photosensitive drum peripheral surface toward the drum.

The image forming section 6 also has a rotatable photosensitive drum 44 as an image carrier disposed substantially in the center of the apparatus main body 10, and the peripheral surface of the photosensitive drum is covered by the laser exposure device 40. To expose a desired electrostatic latent image. Around the photosensitive drum 44, a charger 45 for charging the drum peripheral surface to a predetermined electric charge, and a toner as a developer for the electrostatic latent image formed on the peripheral surface of the photosensitive drum to supply a desired image. Developer 4 for developing with density
6. A transfer target material fed from a paper cassette, which will be described later, that is, a separation charger 47 for separating the copy paper P from the photoconductor drum is integrally provided, and the toner image formed on the photoconductor drum is transferred to the paper P. Transfer charger 48 for transferring the toner onto the peripheral surface of the photosensitive drum, a peeling claw 49 for peeling the copy sheet from the peripheral surface of the photosensitive drum, a cleaning device 50 for cleaning the toner remaining on the peripheral surface of the photosensitive drum, and a static eliminator for discharging the peripheral surface of the photosensitive drum 51 are arranged in order.

An upper cassette 52, a middle cassette 53, and a lower cassette 54, which can be pulled out from the apparatus body, are arranged in a laminated state at the lower part of the apparatus body 10, respectively.
Copy papers of different sizes are filled in each cassette. Large capacity feeders 5 beside these cassettes
5, a large-capacity feeder accommodates about 3000 sheets of frequently used copy paper, for example, A4 size copy paper. Further, above the large-capacity feeder 55, a paper feed cassette 57 also serving as a manual feed tray 56 is detachably attached.

In the apparatus main body 10, a conveying path 5 extending from each cassette and the large-capacity feeder 55 through a transfer portion located between the photosensitive drum 44 and the transfer charger 48.
8 is formed, and a fixing device 60 including a press roller 80 and a heat roller 81 is provided at the end of the conveying path. A discharge port 61 is formed on the side wall of the apparatus main body 10 facing the fixing device 60, and a discharge tray 62 is attached to the discharge port.

In the vicinity of the upper cassette 52, the middle cassette 53, the lower cassette 54, the paper feeding cassette 57, and the large-capacity feeder 55, the pickup roller 6 for taking out the sheets one by one from the cassette or the large-capacity feeder.
3 are provided. Further, in the transport path 58,
A large number of paper feed roller pairs 6 that convey the copy paper P taken out by the pickup roller 63 through the conveyance path 58.
4 are provided.

A pair of registration rollers 65 is provided upstream of the photosensitive drum 44 in the transport path 58. The registration roller pair 65 corrects the inclination of the copy paper P taken out and aligns the leading edge of the toner image on the photoconductor drum 44 and the leading edge of the copy paper P, and adjusts the movement speed of the peripheral surface of the photoconductor drum. The copy paper P is fed to the transfer unit at the same speed. A pre-aligning sensor 66 for detecting the arrival of the copy paper P is provided on the side of the registration roller pair 65, before the jam, and on the side of the paper feed roller pair 64.

The copy sheets P taken out one by one from each cassette or the large-capacity feeder 55 by the pickup roller 63 are sent to the registration roller pair 65 by the paper feed roller pair 64. Then, the copy paper P is sent to the transfer section after the leading end is aligned by the registration roller pair 65. At the transfer portion, the developer image shaped on the photosensitive drum 44, that is, the toner image is transferred to the transfer charger 4
8 is transferred onto the paper P. The copy sheet P on which the toner image is transferred is peeled off from the peripheral surface of the photosensitive drum 44 by the action of the peeling charger 47 and the peeling claw 49, and is transferred to the fixing device 60 via the conveyance belt 67 forming a part of the conveyance path 58. Be transported. Then, after the developer image is fused and fixed on the copy paper P by the fixing device 60, the copy paper P
Is discharged onto the paper discharge tray 62 through the discharge port 61 by the paper feed roller pair 68 and the paper discharge roller pair 69.

Below the conveying path 58, the copy sheet P that has passed through the fixing device 60 is turned over,
5 is provided with an automatic double-sided device 70 for feeding. The automatic double-sided device 70 has a temporary stacking unit 71 that temporarily stacks the copy sheets P, and a reversing path 72 that branches from the transport path 58 and reverses the copy sheets P that have passed through the fixing device 60 and guides them to the temporary stacking unit 71. A pickup roller 73 for picking up the copy sheets P stacked in the temporary stacking unit one by one, and a sheet feeding roller 75 for feeding the picked-up sheets to the registration roller pair 65 through the transport path 74. Also, the transport path 5
A distribution gate 76 that selectively distributes the copy paper P to the discharge port 61 or the reversing path 72 is provided at a branch portion between the reversing path 72 and the reversing path 72.

When performing double-sided copying, the copy sheets P that have passed through the fixing device 60 are guided to the reversing path 72 by the sorting gate 76, temporarily accumulated in the reversed state in the temporary accumulating section 71, and then picked up. The roller 73 and the sheet feeding roller 75 feed the pair of registration rollers 65 through the conveyance path 74. Then, after the copy paper P is aligned by the registration roller pair 65, the copy paper P is sent to the transfer unit again, and the toner image is transferred to the back surface of the copy paper P. After that, the copy paper P is discharged onto the paper discharge tray 62 via the conveyance path 58, the fixing device 60 and the paper discharge roller pair 69.

FIG. 3 is a sectional view showing the heat roller 81 of the fixing device 60. The heat roller 81 is formed of a metal material into a cylindrical shape, and has a shaft portion 8 as a mounting portion on one end surface thereof.
1a is formed integrally. Inside the heat roller 81, a heater lamp 82 for heating the heat roller 81 is inserted. A bearing 84 is attached to the shaft portion 81a of the heat roller 81 via a heat insulating bush 83, and further, a gear 85 as a resin component for transmitting a rotational force to the heat roller 81 is attached. Gear 85
The heat roller 8 in the hole 86 formed in the center thereof.
One shaft portion 81a is inserted and attached. Gear 85
Is rotated by a drive system (not shown), the heat roller 81 is rotated, and the heat generated by the heater lamp 82 causes
The copy paper is heated to fix the transferred image.

FIG. 1 is a front view showing the gear 85 attached to the heat roller 81. The inner peripheral surface of the hole 86 of the gear 85 has a pair of protrusions 86a, 86a and a recess 86b,
86b are formed to face each other. The pair of protrusions 86a and 86a are inserted into the slits 81b and 81b formed in the shaft 81a along the longitudinal direction of the shaft 81a to function as rotation stoppers, and the recesses 86b and 86b form the shaft 81.
A space portion is formed between the outer peripheral surface portion a and the outer peripheral surface portion a.

The gear 85 is formed by a four-point gate type pin gate method, which will be described later, and four weld lines 87a to 87d are formed as joint surfaces. In the gear 85, the ends of the weld lines 87a to 87d have projections 86a, 86a and recesses 86b, 86b on the inner peripheral surface of the hole 86.
And the shaft portion 81a of the heat roller 81.
The ends of the weld lines 87a to 87d do not come into contact with the outer peripheral surface of the shaft portion 81a when attached to the shaft portion 81a.

Incidentally, the gear 85 is usually formed by the pin gate method as shown in FIGS. 4 and 5, and a part thereof is formed by the film gate method as shown in FIGS. 6 and 7. In the film gate method, the region of the molten resin flowing into the product is in the form of a film, and the gate (resin injection port) 91 has a single structure.

However, when the whole is a film gate,
It takes time and effort to delete the film part, which is costly. Further, if the film portion is removed at the time of molding or is removed by cutting after molding, burrs are generated, and there arises a problem that the shaft portion 81a of the heat roller 81 does not enter the hole portion 86 when the gear 85 is attached. The structure of the film gate for facilitating the removal of the burr and the film portion is shown by the broken line in FIG.

Since the entire circumference is not film-shaped, the gear 85 has two weld lines 88a and 88b. In the case of the pin gate method shown in FIGS. 4 and 5, the gear 85
The weld lines 87a to 87d are always generated in the line.

That is, in this pin gate method, the molten resin is injected from the four pin gates 90a to 90d from the injection ports 100a to 100d of the molding die 100 and spreads in the molding die 100 to be joined. Weld lines 87a-87d are formed. In FIG. 5, a to d are pin gate marks.

The gear 85 having the weld lines 87a to 87d is heated by the heater lamp 82 and cooled when the power is turned off. When this heating and cooling is repeated,
A phenomenon occurs in which cracks occur in the gear 85 from the weld lines 87a to 87d.

In particular, in a high-speed machine with a large heating amount, the number of times of heating and cooling is increased, and the weld line 8
The expansion and contraction of the material at 7a to 87d repeatedly occur and cracks occur.

Here, as shown in FIG. 8, of the four weld lines 87a to 87d, two weld lines 8 are used.
7a, 87c are brought into contact with the outer peripheral surface of the shaft portion 81a of the heat roller 81, and the other two weld lines 87b, 87
An experiment was conducted by repeating heating and cooling without positioning d on the rotation preventing projections 86a and 86a and contacting the outer peripheral surface of the shaft portion 81a of the heat roller 81.

In this case, the shaft portion 8 of the heat roller 81
Cracks remarkably occur on the weld lines 87a and 87c that are in contact with 1a, and conversely, the weld lines 87 that are not in contact with the outer peripheral surface of the shaft portion 81a of the heat roller 81.
It was clarified that the number of cracks was extremely small in b and 87d.

FIG. 9 shows the cycle of the temperature shock (heat cycle test) used in the experiment. Tables 1 and 2 show PPS (Forttron 1140A4 as sample material).
Made of polyplastic, average wall thickness 3, module 1, Z
= 60 sheets, tooth width 8) shows the results of a bending fracture test.

[0048]

[Table 1]

Table 1 shows the gears formed by the 4-point gate method with a pin gate diameter of 0.8φ, the 2-point gate method, the film gate method, and the 4-point gate method with a pin gate diameter of 1.2φ. The result of the bending fracture test along the first line including the weld lines 87a and 87c, the second line including the weld lines 87b and 87d, and the third line passing through the central portion without including the weld lines, and The number of heat cycles and the presence or absence of cracks are shown.

From this table, the first and second lines and the third line
There is a slight difference in the results of the bending fracture test with the line of. When the number of gates is increased, the results of the bending fracture test on the second line show that the 4-point gate has a slightly higher strength than the 2-point gate. However, the heat cycle results are clearly better with the 2-point gate than with the 4-point gate. Therefore, considering the effect of preventing cracks, there is no particular advantage in increasing the number of pin gates in order to increase the strength of the weld line.

In the heat cycle test, cracks occur when the weld lines 87a and 87c are in contact with the shaft portion 81a of the heat roller 81, but they are in contact with the weld lines 87b and 87d which are not in contact. Cracks do not occur until the number of times is four times or more compared with the case.

[0052]

As described above, the present invention has the following features.
Since the resin components are attached to the mounting portion so that the resin joint surface portion facing the inner peripheral surface portion of the hole does not come into contact with the outer peripheral wall surface of the mounting portion, cracks are not generated in the resin joint surface portion. It can be reduced, and damage due to cracks can be reduced and improved.

Further, the reliability of the device can be improved by eliminating damage due to cracks. According to the invention as set forth in claims 5 to 8, the resin bonding member is attached to the shaft portion of the heat roller so that the resin bonding surface portion facing the inner peripheral surface portion of the central hole portion of the resin rotary member does not come into contact with the outer peripheral wall surface of the shaft portion. , It is possible to reduce the occurrence of cracks in the resin joint surface portion,
The damage due to cracks can be reduced and improved. Further, reliability of the device can be improved by eliminating damage due to cracks. You.

[Brief description of drawings]

FIG. 1 is a front view showing a heat roller and a gear according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing the inside of an electrophotographic apparatus.

FIG. 3 is a cross-sectional view showing a mounting structure of a heat roller gear.

FIG. 4 is a side view showing manufacturing of a gear by a pin gate method.

FIG. 5 is a front view showing manufacturing of a gear by a pin gate method.

FIG. 6 is a side view showing manufacturing of a gear by a film gate method.

FIG. 7 is a front view showing manufacturing of a gear by a film gate method.

FIG. 8 is a view showing a weld line that does not contact a weld line that contacts the shaft portion of the heat roller.

FIG. 9 is a graph showing a heating cycle for a resin gear.

[Explanation of symbols]

 81 ... Heat roller (mounting member) 100 ... Mold 100a-100d ... Injection port 86 ... Hole 85 ... Gear (resin part) 87a-87d ... Weld line (joint surface)

Claims (8)

[Claims] 1. A resin component having a hole in the center, which is made of resin that is injected in a molten state from a plurality of injection ports of a molding die in a molten state, joined and then cured and molded, and the resin component is intermittently connected to the hole. Mounting means for mounting the resin component by inserting a heating portion that is heated to a desired temperature, the resin component being a joint surface portion of the resin injected from the plurality of injection ports facing the inner peripheral surface portion of the hole portion. The mounting structure for a resin component, wherein the end portion of the resin component is mounted in a non-contact state with the outer peripheral surface of the mounting portion. 2. A molding die made of a resin which is injected from a plurality of injection ports in a molten state in a molten state to be joined and then hardened and molded, and has a hole portion in a central portion, and a protrusion portion on an inner peripheral surface portion of the hole portion. Insert the protruding resin part and the hollow mounting part that is intermittently heated into the hole of this resin part, and insert the protruding part of the inner peripheral surface of the hole into the wall surface of the hollow mounting part. An attachment means for inserting the resin component into the formed through hole to attach the resin component, wherein the resin component joins the resin injected from the plurality of injection ports to the protrusion of the inner peripheral surface of the hole. A mounting structure for resin parts, characterized in that the end of the surface is exposed. 3. A molding die, which is made of a resin which is poured from a plurality of injection ports in a molten state in a molten state and bonded and then cured and molded, and which has a hole in the center and a recess in the inner peripheral surface of the hole. And a mounting means for mounting the resin component by inserting a mounting portion that is intermittently heated into the hole portion of the resin component, the resin component being a recess of the inner peripheral surface of the hole portion. A mounting structure for a resin component, characterized in that an end of a joint surface portion of the resin injected from the plurality of injection ports is exposed. 4. A molding die, which is made of a resin that is injected in a molten state from a plurality of injection ports in a molten state and is bonded and then cured and formed, has a hole in the center, and a protrusion and an inner peripheral surface of the hole. A resin component provided with a recess and a hollow mounting portion that is intermittently heated are inserted into the hole of the resin component, and the protrusion of the inner peripheral surface of the hole is attached to the wall surface of the hollow mounting portion. Mounting means for mounting the resin component by inserting the resin component into the through hole formed in, and the resin component is injected from the plurality of injection ports into the protrusion and the recess of the inner peripheral surface of the hole. A mounting structure for resin parts, characterized in that the ends of the resin joining surface are exposed. 5. A rotating member made of a resin, which is made of a resin that is injected in a molten state from a plurality of injection ports of a molding die in a molten state, is bonded and then is cured, and has a hole in a central portion, and a hole of the rotating member. A heat roller that inserts a shaft portion that is intermittently heated into the portion and attaches the rotating member, and that rotates by rotation of the rotating member to heat the material to be fixed, wherein the rotating member has a hole portion thereof. The fixing device is characterized in that the ends of the joining surface portions injected from the plurality of resin injection ports facing the inner peripheral surface portion are attached to the outer peripheral surface portion of the shaft portion in a non-contact state. 6. A resin which is molded in a molten state from a plurality of injection ports of a molding die, is bonded and then cured, has a hole in the center, and has a protrusion on the inner peripheral surface of the hole. A protruding rotating member made of resin and a hollow shaft portion that is intermittently heated are inserted into the hole portion of the rotating member, and the protruding portion on the inner peripheral surface portion of the hole portion is inserted into the hollow shaft portion. A heat roller that is inserted into a through hole formed in the wall surface of the rotary member to attach the rotary member, and that is rotated by the rotation of the rotary member to heat and fix the fixing target. 2. A fixing device, characterized in that an end of a joint surface portion of resin injected from the plurality of injection ports faces a projection portion of an inner peripheral surface portion of the fixing device. 7. A molding die, which is made of a resin which is injected in a molten state from a plurality of injection ports in a molten state and is bonded and then cured and formed, has a hole in the center, and has a recess in the inner peripheral surface of the hole. The rotating member made of resin, and the shaft member that is intermittently heated is inserted into the hole of the rotating member to attach the rotating member, and the rotating member is rotated by the rotation of the rotating member to heat and fix the fixing target. A fixing device, comprising: a roller, wherein the resin component has a concave portion of an inner peripheral surface portion of a hole thereof facing an end portion of a joint surface portion of the resin injected from the plurality of injection ports. 8. A resin made of a resin which is injected in a molten state from a plurality of injection ports of a molding die in a molten state and bonded and then hardened and molded, and has a hole portion at a central portion, and a projection portion and an inner peripheral surface portion of the hole portion A resin-made rotating member provided with a concave portion and a hollow shaft portion that is intermittently heated are inserted into the hole portion of the rotating member, and the protrusion on the inner peripheral surface portion of the hole portion is inserted into the hollow shaft portion. A heat roller that is inserted into a through hole formed in the wall surface of the section to attach the rotating member and that is rotated by the rotation of the rotating member to heat and fix the fixing target. The fixing device is characterized in that the ends of the joint surface portion of the resin injected from the plurality of injection ports are made to face the protrusion and the recess of the inner peripheral surface of the portion.