JP2002326251A - Part-joined object, process cartridge and electrophotographic image forming apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the rigidity of a part-joined object obtained by abutting the outer peripheries of two or more resin parts to form a molten resin injection part in the abutted potion and injecting a molten resin in the molten resin injection part through the resin injection passage in one resin part to join container parts. SOLUTION: Spaces 154a and 154b crossing the paper surface of a drawing at a right angle are provided between the container parts 51 and 52 and spaces 154e and 154f are provided toward the interiors of the container parts 51 and 52 (joined to be formed into a toner container 50) from the spaces 154a and 154b. The molten resin is injected in the spaces 154a and 154e and the spaces 154b and 154f to join the container parts 51 and 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic image forming apparatus employing an electrophotographic method, such as a laser printer or a copying machine, a process cartridge, and a structure of a synthetic resin component assembly used for the same.

Here, the electrophotographic image forming apparatus forms an image on a recording medium using an electrophotographic image forming method. Examples of the electrophotographic image forming apparatus include, for example, an electrophotographic copying machine, an electrophotographic printer (for example, a laser beam printer, an LED printer, etc.), a facsimile machine, and a word processor.

The process cartridge is a cartridge in which a charging unit, a developing unit or a cleaning unit and an electrophotographic photosensitive member are integrally formed into a cartridge, and this cartridge is detachably mountable to an image forming apparatus main body.
In addition, at least one of the charging unit, the developing unit, and the cleaning unit and the electrophotographic photosensitive member are integrally formed into a cartridge so that the cartridge can be attached to and detached from the image forming apparatus main body. Further, at least the developing means and the electrophotographic photosensitive member are integrally formed into a cartridge so as to be detachable from the image forming apparatus main body.

[0004]

2. Description of the Related Art First, a conventional color laser printer will be outlined with reference to a sectional view of FIG. In FIG. 25, 1
Reference numeral 05 denotes a rotary developing device. The rotary developing device 105 includes developing devices 105M, 105C, 105Y, and 105B provided with magenta, cyan, yellow, and black toners. These four color developing units 105M, 105C, 1
05Y and 105B are arranged rotatably with respect to the shaft 105e, and the respective centers rotate in conjunction with the rotating gears arranged on the outer periphery of the revolving gear, and their postures are kept constant. Thus, when forming an image, the developing devices (105M, 105C, 105Y,
105B) stops at a position facing the image carrier 104,
Further, there, the developing roller 105b is positioned so as to face the surface of the image carrier 104 via a minute gap.

At the time of development, the developing roller 105b receives a bias application and a rotation drive to develop a latent image on the photosensitive drum 104 as an image carrier and to visualize the latent image as a toner image.

Incidentally, each of the developing units 105M, 105C,
Developing rollers 10 arranged in 105Y and 105B, respectively.
A supply roller 105a is rubbed against 5b, and each supply roller 105a is configured to scrape off the developer that has not contributed to the development, and a fresh developer is always supplied to the development roller 105b. . The toner containers supplied to the developing roller 105b include developing devices 105M, 105C,
5Y and 105B are provided integrally with each other. Here, a conventional toner container will be described.

FIG. 1B is a main cross-sectional view schematically showing a conventional toner container 40.
1 is formed by flowing the same resin as the toner container 42 and the lid 41 through the butting portions 142a and 142b in the mold using a die slide injection molding method (primary and secondary same mold: for example, Japanese Patent Publication No. 2-38377). Are joined.

The toner container 42 and the lid 41 have flanges 143a and 143 at the butting portions 142a and 142b, respectively.
b, 143c, 143d, and the recesses or projections 144a, 144b, 144 in the die-cutting direction intermittently or continuously along the longitudinal direction on the back surface of the flange.
c, 144d are provided, and the concave portion or the convex portion is engaged with a predetermined portion in the mold.

A gate 72 referred to as a molding technique, which is an inlet for injecting a joining material into a gap formed by opposed surfaces between molded products that are close to or in contact with each other, is formed between frames as shown in FIG. It is provided on a substantially horizontal extension in the horizontal direction, which is a gap to be formed. The molten resin flows through the gate 72 as shown by the arrow 70 and flows into the butting portion 142a at right angles from the horizontal direction.

[0010]

However, in the above-mentioned conventional example, since the joining material is injected only into the outer periphery of the two hollow molded products, there is a limit in obtaining stronger rigidity.

[0011] The present invention provides a flow channel shape for injecting a joining material into an inner portion of an outer periphery of a hollow molded article, and provides a more rigid synthetic resin hollow frame by injecting the joining material. With the goal.

[0012]

The main aspects of the present invention are as described below with reference to the claims.

A first invention according to the present application is a mold in which at least two or more molded articles obtained by plastic injection molding are temporarily joined together, and the temporary joined body is used for forming each molded article. In a configuration in which molten resin is injected into the temporary joining portion and joined in a state where each molded product and the jig and tool are positioned in that state, and in the state where each molded product and the jig and tool are positioned, in the joining portion between molded products A space is provided between the molded products within the joint along the outer periphery of the molded product, and a space is provided from this space to the inside of the joined body, and the molten resin material is injected into each of the spaces to join the molded products together. This is the assembled part.

[0014] A second invention according to the present application is a mold in which at least two or more molded articles obtained by plastic injection molding are temporarily joined together, and the temporary joined body is used for forming each molded article. In a configuration in which molten resin is injected into the temporary joint portion and joined in a state where each molded product and the jig and tool are positioned in that state, the first and second molding are performed. The articles each have a rib overlapped on the inner peripheral side along the resin injection portion of the joint provided along the circumference, the first molded article has a certain interval facing each other, and from the rib to the inside of the molded article Construct a pair of convex portions with continuously extending ribs, the second molded product faces each other,
And with a certain interval shorter than the interval, a pair of convex portions is configured by a rib that continuously extends from the overlapping rib to the inside of the molded product, and the pair of convex portions in the second molded product is the first convex portion. Injecting and joining a molten resin material for joining into a space facing the inside of the joined body formed by overlapping the projecting portions of the first frame and the second frame so that the pair of projecting portions of the molded product are covered. A synthetic resin component assembly characterized by the following configuration.

According to a sixth aspect of the present invention, there is provided a process cartridge detachably mountable to an image forming apparatus main body, wherein an electrophotographic photosensitive drum, a process means acting on the electrophotographic photosensitive drum, an electrophotographic photosensitive drum or a process. And a frame formed by joining a plurality of molded articles supporting the means, wherein the frame temporarily joins at least two or more molded articles obtained by plastic injection molding. Then, the mold is set on a jig different from the mold used to form each molded product, and in that state, the molten resin is injected into the temporary joint portion in a state where each molded product and the jig are positioned. In the configuration to be joined together, the first and second molded articles each have a rib overlapping the inner peripheral side along the resin injection portion of the joint provided along the circumference, and the first molded articles face each other. Fixed With a gap, a pair of convex portions is constituted by a rib continuously extending from the rib to the inside of the molded article, the second molded article has a constant interval facing each other and shorter than the interval, and the overlap is formed. A first frame is formed by forming a pair of convex portions with ribs extending continuously from the holding ribs to the inside of the molded product, and covering the pair of convex portions in the first molded product with the pair of convex portions in the second molded product. A synthetic resin component coupling characterized by injecting and joining a molten resin material for bonding into a space facing the inside of the coupling body formed by overlapping the projections of the body and the second frame. A process cartridge having a body.

According to a tenth aspect of the present invention, there is provided an electrophotographic image forming apparatus for detachably attaching a process cartridge to form an image on a recording medium, comprising: an electrophotographic photosensitive drum; and a process means acting on the electrophotographic photosensitive drum. A frame formed by joining a plurality of molded articles supporting an electrophotographic photosensitive drum or a process means, wherein said frame is formed by temporarily arranging at least two or more molded articles obtained by plastic injection molding. Combined, the temporary joint is set on a jig different from the mold used to form each molded article, and in that state, each molded article and the jig are positioned with the jig being positioned. In the configuration in which the molten resin is injected into the temporary joining portion and joined, the first and second molded products each have a rib overlapping on the inner peripheral side along the resin injection portion of the joining portion provided around, and Goods Has a constant interval each other opposite each other, and constitute a pair of convex portions continuously extending rib into the interior moldings from the rib, the second molded product is face to face with each other,
And with a certain interval shorter than the interval, a pair of convex portions is configured by a rib that continuously extends from the overlapping rib to the inside of the molded product, and the pair of convex portions in the second molded product is the first convex portion. Injecting and joining a molten resin material for joining into a space facing the inside of the joined body formed by overlapping the projecting portions of the first frame and the second frame so that the pair of projecting portions of the molded product are covered. An electrophotographic image forming apparatus, comprising: mounting means for removably mounting a process cartridge having a synthetic resin component assembly having a structure to be carried out; and transport means for transporting a recording medium. .

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

An embodiment of the present invention for joining four container parts will be described with reference to FIGS. The combination of the four container parts means that the toner storage container (second frame) and the cleaning container (first frame) are connected to the F (front) side and R (rear) side side covers (third and fourth frames). Body). The longitudinal direction in this embodiment means a direction perpendicular to the recording medium transport direction and parallel to the surface of the recording medium.

(Description of Process Cartridge and Apparatus Main Body) FIG. 18 is a main sectional view of a process cartridge according to the present invention, and FIG. 17 is a main cross section of an image forming apparatus according to the present invention. This process cartridge has an electrophotographic photosensitive member and a process means acting on the electrophotographic photosensitive member. Here, as the process means, for example, a charging means for charging the surface of the electrophotographic photosensitive member, a developing device for forming a toner image on the electrophotographic photosensitive member, and a cleaning means for removing toner remaining on the surface of the electrophotographic photosensitive member include: is there.

Process cartridge 13 of the present embodiment
As shown in FIG. 18, a charging roller 17 serving as a charging unit 17 is provided around a photosensitive drum 15 as an electrophotographic photosensitive member serving as an image carrier, a developing roller 20s and a developing blade 20b serving as a developing device, and a cleaning blade serving as a cleaning unit. Placing a cleaning container 14 having 16;
Process cartridge 13 integrally covered with the housing
And an image forming apparatus main body (hereinafter, referred to as an apparatus main body) 18
Is configured to be detachable.

The process cartridge 13 is mounted on an electrophotographic image forming apparatus C as shown in FIG. 17 and used for image formation. In image formation, a transfer material 2 as a recording medium is conveyed from a paper supply cassette 1 mounted at a lower portion of the apparatus by a paper supply roller 3 and a conveyance roller 7, and a scanner is scanned onto a photosensitive drum 15 in synchronization with the conveyance of the transfer material 2. A latent image is formed by performing selective exposure from step 30. Then, the toner container 50
The toner contained in the toner is supplied to the photosensitive drum 15 in accordance with a latent image by applying a triboelectric charge by the developing blade 20b, carrying a thin layer on the surface of the developing roller 20s, and applying a developing bias to the developing roller 20s. I do. This toner image is transferred onto a transfer material 2 which is a recording medium conveyed by applying a bias voltage to the transfer roller 10, and the transfer material 2 is conveyed to a fixing device 25 to fix the image. Discharge section 2 at the top of the device
Discharge to 4. On the other hand, after the transfer, the toner remaining on the photosensitive drum 15 is removed by the cleaning blade 16, and is moved to the rear side of the removed toner reservoir 14d by the removed toner feeding member 14e.

(Frame Structure of Process Cartridge) FIG.
9 and 20 are perspective views showing the frame structure of the process cartridge. FIG. 19 is a diagram before assembling these frames, and FIG. 20 is a diagram after assembling these frames. The process cartridge 13 includes a photosensitive drum 15, a charging roller as a charging unit 17, a cleaning blade 16.
The cleaning container 14, the developing roller 20s, and the developing blade (not shown in FIG. 19,
Development frame 1 integrally supporting the developing frame 1
9. It is composed of three frames of a toner container 50 containing toner. Further, in order to integrally support these three frames, the cleaning container 14 and the toner container 5
The developing frame 19 is supported by the cleaning container 14 and the process cartridge 13 is formed.

A cleaning blade 16 is fixed to the cleaning container 14 with a small screw or the like, and a charging means 17 rotatably supports a metal core at an end via a bearing member (not shown). Further, as shown in FIG. 18, the cleaning container 14 has a removed toner feeding member 1 for feeding the toner removed by the cleaning blade 16 to the removed toner reservoir 14d.
4e is provided rotatably. The photosensitive drum 15 has flanges 15a and 15b at both ends, respectively, and bearing members 39a and 39b attached to the cleaning container 14.
(Only 39a is shown), and is rotatably supported by the cleaning container 14. The toner container 50 has stirring members 50e, 50f (FIG.
8) is stored together with the toner.

The side covers 37 and 38 are large enough to cover the main cross section of the process cartridge 13 (vertical surface in the direction in which the recording medium is conveyed). The cleaning container 14 and the toner container 50 are fixed to the cleaning container 14 and the toner container 50 from both sides, respectively, and integrally support the cleaning container 14 and the toner container 50. The holes 37a of the side covers 37, 38,
38a is positioned coaxially with the center of the photosensitive drum of the cleaning container 14. In the illustrated side cover 37 side, the bearing member 39a is provided with the hole 14 of the cleaning container 14.
a. The shaft member 43 is provided with the hole 37a of the side cover, the bearing member 39a, and the center hole 15 of the flange 15a.
a1 and rotatably supports one end of the photosensitive drum 15. At this time, since the side cover 37 is positioned via the bearing member 39a, the position of the side cover 37 with respect to the photosensitive drum 15 is accurately determined. Further, a pin-shaped positioning portion 37b provided as far as possible from the photosensitive drum 15 is attached to the side surface 14c of the cleaning container 14.
The position of the photosensitive drum 15 in the rotation direction is determined by fitting into the positioning portion 14b which is a hole provided in the photosensitive drum 15.

Further, the toner container 50 is a hole in which cylindrical positioning portions 50a and 50b project in the longitudinal direction from one end surface 50d in the longitudinal direction, and the positioning portions 50a and 50b are provided in the side cover 37. Positioning parts 37c, 37
d. The other side cover 3
8 is also positioned in the toner container 50 and the cleaning container 14 (reference numerals 38a to 38d). Developing frame 19
Is determined by the method described later. Also, the bearing member 3
Reference numerals 9 (39a, 39b) also serve to position the process cartridge 13 with respect to the image forming apparatus main body 18.

To supply toner from the toner container 50 to the developing roller 20s, an opening 50c (see FIG. 18) and an opening 19a are provided in the toner container 50 and the developing frame 19, respectively. The developing frame 19 and the toner container 50 are
a and 50c are connected by a flexible sealing member 44 as a sealing member. Also, the toner container 5
0 is positioned with respect to the side covers 37 and 38, and since the developing frame 19 is positioned with respect to the cleaning container 14, there is a dimensional error between the developing frame 19 and the toner container 50, so that an interval is provided. Need to be kept. The process cartridge 13 is mounted on the image forming apparatus main body 18 on the side of the cleaning container 14 supporting the photosensitive drum 15.
The toner container 50 has a large weight difference between a case where a large amount of toner is stored and a case where the toner container 50 is empty, and is mounted in the toner container 50 and / or the side covers 37 and 38. Distortion may occur. Therefore, the seal member 44 uses a flexible material.

(Structure of Developing Frame) The structure of the developing frame will be described with reference to FIGS.

In the developing frame 19, as a developer carrying member,
A developing roller 20s including a magnet roller 20a (see FIG. 19) and a developing blade 20b are provided. Both ends of the developing roller 20 s are rotatably supported by the developing frame 19. Power is supplied to the developing roller 20s by providing an electric contact inside the developing roller 20s.

The developing frame 19 has a suspension hole 19d at the end of an arm 19c provided on the driving side, which is one end side in the longitudinal direction of the developing roller 20s, as the center of rotation of the swing. Are swingably supported by the cleaning container 14 such that the center of the cleaning container 14 is oriented. That is, the developing frame 19 including the developing roller 20s is arranged on the driving side on the cleaning container 14 so as to be swingable around a pin (not shown) fitted in the hanging hole 19d, and as described above. Since the cleaning container 14 and the toner container 50 are fixed without moving relatively, the developing frame 19 can be relatively moved with respect to the toner container 50. Then, on the drive side where the arm portion 19c is located, a spring coil (not shown) provided on the cleaning container 14 and a tension coil spring (not shown) provided on a spring hook (not shown) provided on the developing frame 19 are respectively applied to the developing roller 20s. One end is photosensitive drum 1
5 toward one end.

Further, on the non-driving side of the developing frame 19, a projecting member 19e is fixed on the central axis of the developing roller 20s, and the projecting member 19e is configured to be pressed toward the center of the photosensitive drum 15. ing.

The projecting member 19e is inserted into a groove 37e (in this embodiment, a linearly elongated hole in the radial direction of the photosensitive drum 15) provided in the side cover 37, and
Is configured to be movable in the center direction. That is, the protruding member 19e is a moving member that moves one end of the developing roller 20s. A compression coil spring (not shown), which is an urging member, is provided inside the groove 37e so as to press the protruding member 19e via a slide piece movable along the groove 37e.

The above-mentioned side covers 37 and 38 are container-shaped, and the sides facing the side surfaces 50d and 14c of the toner container 50 and the cleaning container 14 are open. The side surface 50d of the toner container and the side surface 14 of the cleaning container
Edges 37h and 38h of side covers 37 and 38 are joined to edges 50h and 14h of c. Any one of Embodiments 1 to 9 described below is applied to this joining.

(Joining of the outer periphery of a hollow molded product) FIGS. 1A, 13 and 14 show an embodiment. This will be described. At least 2 obtained by plastic injection molding
The jig 20 shown in FIG. 13 used to form the toner container main body 51 and the lid 52 as two or more molded articles.
0a, 200b, a molten resin injection portion 154 (154a, 15b) that forms a gap, which is a butted portion formed by opposed surfaces between molded products that abut against each other or come into contact with each other.
Since the configuration is such that the molten resin material for bonding is injected and bonded in 4b), a plurality of parts can be bonded, the degree of freedom in design is improved, and the assembly is simplified.

The joint is not the entire area of the gap formed by the opposing surfaces between the molded products that are close to or in contact with each other. This is essential to reduce the amount of deformation of the joined body. Further, by providing a rib in a direction obstructing the resin flow path (perpendicular to the flow path) to stop the flow of the resin, it is possible to select a part to be joined intentionally. Making the butt 154 a closed figure may deform the parts to be joined. Therefore, as shown in FIG. 15 or FIG.
4 is provided with a resin stopper rib 400. This is the butt 15
4 (154a, 154b, 154c, 154d) is preferably provided at right angles to the flow direction of the molten resin. However, it is sufficient that the flow of the molten resin can be stopped even if it is not a right angle. Therefore, the portion where the resin stopper rib 400 is located is the rib 160 (16
0a, 160b, 160c, 160d) are provided with notches so as not to interfere with the resin stopper rib 400.

(Detailed Description of Outer Periphery of Joint) As shown in FIGS. 1 (a) and 4, at least two or more molded products 51 and 52 obtained by plastic injection molding are abutted to each other by a jig and brought into close proximity. Alternatively, in a structure in which a molten resin material for bonding is injected into gaps 154a and 154b formed by opposing surfaces between abutted molded products and bonded, the respective container parts 51 and 52 with which the bonded structure abuts each other. Formed flange portions 152a, 152b, 152c, 1
52d and ribs 160a, 160b, 160c, 160d formed in the die-cutting direction from the flange portion thereof, and one of the container parts 52 has the ribs 160a, 160b, 160c, 160d.
When the molten resin material for joining is injected into the butting portions 154a and 154b, the container component 51 having the flange portion
Ribs 161 for preventing ribs 160b and 160d formed in the direction of die release from being deformed toward the container inner side 60a.
a and 161b are also provided in the die removing direction as in the above.

(Leakage of joining material) As shown in FIGS. 1 (a) and 4, the ribs 160a and 160a formed in the die-cutting direction from the flanges formed by the respective containers in the joining structure of the embodiment. The ribs 160b and (160c, 160d) have a thickness of 0.3 mm to 2.5 mm, so that when the joining material is injected into the butt portion, the ribs butt vertically and radially to the flow direction. As shown in FIGS. 4A and 14, the joining material that has been brought into close contact with the jig tool 200 a and the backup rib 161 a of the mating container part 52 and injected into the butting portion 154 enters the container as shown in FIGS. There is no leakage.

(Determination of Channel Cross-sectional Area) In the joint structure of the embodiment, the cross-sectional area 55 (see FIG. 14) of the molten resin injection section 154 perpendicular to the resin flowing direction is 1 to 9 mm 2. Thus, the molten resin injection portion 154 depends on the joining strength and the length (region) L (see FIG. 2) to be joined.
a, the cross-sectional area 55 of 154b can be determined. In the region L, the toner container main body 51 and the toner container lid 52 have a portion that is in close contact and a portion that is integrally connected by a gap 154 formed by a facing surface between molded products that are close to or in contact with each other.

(Detailed Description of Resin Channel) FIG. 4 is a longitudinal sectional view of a synthetic resin hollow body for explaining the embodiment. Note that a vertical cross-sectional view 1 (a) of FIG. 1 in a direction perpendicular to FIG. 4 will be described later.

FIG. 4A shows an embodiment of the present invention, and FIG. 4B shows a conventional example for comparison with the first embodiment of the present invention.

The container parts 51 and 52, each of which is a molded article, obtained by plastic injection molding, are butted with a jig (not shown), and a molten resin material for joining is injected into the butting portions 154a and 154b. 51 and 52 are joined.

Here, in this embodiment, the container component 5
Flanges 152a, 152 are formed in the gaps formed by the facing surfaces between the molded products in which the molded products 1 and 52 approach or abut respectively.
b and 152c, 152d. The flanges 152b and 152d of the upper one container part 51 are ribs in the direction of die cutting provided along the edge of the container part 51, and the flange parts 152a and 152a of the lower other container part 52 are provided.
It has ribs 160b and 160d that abut against 152c.

The ribs 160b, 16 of the upper container part 51
0d points in the up-down direction (die-cutting direction). The inner walls 51b and 51d of the upper container part 51 are provided with ribs 160.
b, 160d are provided on the same plane as one side surface. The flange portions 152b and 152d of the upper container component 51 are outer flanges on the outer peripheral side of the container component 51, and have horizontal flange surfaces 152b1 and 152d1. Rib 16
0b and 160d have a wall thickness perpendicular to the die-cutting direction of 0.
3 mm to 2.5 mm. These ribs 160b, 160
The top surface of d is a horizontal surface, and the rib 160
The inner corners of b and 160d are chamfered C.

The flange part 1 of the other lower container part 52
Reference numerals 52a and 152c denote ribs in the die-cutting direction provided along the edge of the container part 52, and oppose between molded articles that are close to or in contact with the outer peripheral sides of the ribs 160b and 160d of the one container part 51. Flange portions 152b, 152d of one container component 51 provided with molten resin injection portions 154a, 154b, which are gaps formed by the surfaces, provided therebetween.
Have ribs 160a and 160c that abut against. Horizontal flange surfaces 152a1, 152a1 of the flange portions 152a, 152c
The ribs 160b, 1 of the upper container part 51 are provided at 152c1.
60d contacts. Here, the ribs 160a and 160c are provided in the die-cutting direction (vertical direction). The lower container part 52 is provided with ribs 160a and 160c in parallel with the ribs 161a and 161b, respectively. This rib 1
The outer surfaces 60a and 160c are flush with the ends of the flange portions 152a and 152c. Flange 152a, 1
52 c is on the outer peripheral side of the container part 52. The flange surfaces 152a1 and 152c of the flange portions 152a and 152c
1 and ribs 160b, 160 of the container part 51 on the upper side.
d touches. The thickness of the ribs 160a, 160c perpendicular to the die-cutting direction is 0.3 mm to 2.5 mm.

Flange 152 of container parts 51 and 52
a, 160b provided on ribs 152b, 152c, 152d
a, 160b, 160c, and 160d have the same height from the flange surfaces 152a1, 152b1, 152c1, and 152d1, respectively.

Each of the ribs 160a, 160b, 160
c, 160d are resin gaps 154a, 1 which are gaps formed by opposing surfaces between molded products in proximity to or in contact with each other.
The corner on the root side on the 54b side is rounded with a radius r (only one of the symbols is shown). The heights of the ribs 160b, 160d of the upper container part 51 and the ribs 160a, 160c of the lower container part 52 are equal. Therefore, in a state in which the molten resin for joining is not injected into the butting portions 154a and 154b, the gaps 154a and 154b formed by the opposing surfaces between the molded products that are close to or in contact with each other are rectangular spaces in cross section, and one diagonal corner. Have r respectively.

Each of the ribs 160a, 160b, 160
c and 160d are provided along the edges of the container parts 51 and 52. That is, the shapes of the edges of the container parts 51 and 52 in the inner and outer directions are the same as shown in FIG.

Here, the cross-sectional area of the gaps 154a and 154b formed by the opposing surfaces between the molded products that approach or abut each other is 1 to 9 mm 2. In this example, since the cross-sectional shape of the butting portions 154a and 154b is substantially square, the height of each rib 160a, 160b, 160c and 160d is approximately 1 to 3 mm.

In the other container part 52, a gap 154 formed by an opposing surface between molded products in which the ribs 160b and 160d of the one container part 51 approach or abut.
The backup ribs 161a and 161b in the die-cutting direction for preventing deformation toward the inside of the container when the molten resin material for bonding is injected into the container parts 5 and 154b.
One of the ribs 160b and 160d is provided on the inner side.
The ribs 161a and 161b have the same side surfaces as the inner walls 51b and 51b of the lower container part 52.

The lower container part 52 has a flat inner wall 52.
a, 52b, and the inner walls 52a, 52b extend beyond the flange portions 152a, 152c to form the backup rib 161.
a, 161b. The height of the backup ribs 161a, 161b is the same as the flange surface 152a.
1, 154c, a gap 154a, 1 formed by an opposing surface between molded products which approached or abutted upward from the molded product.
The flange portions 1 of the upper container parts 51 at the height of 54b respectively
It is almost equal to the size obtained by adding the thicknesses of 52b and 152d. The thickness of the backup ribs 161a and 161b is substantially equal to the thickness of the lower container part 52. That is, when the ribs 160b and 160d are deformed and a force is applied to the backup ribs 161a and 161b as described later,
It is necessary to reduce the amount of deformation of the backup ribs 161a and 161b themselves.

FIG. 4 shows the embodiment of the present invention (a).
And the conventional example is shown as (b). Now, the conventional example,
It is assumed that the width of the completed synthetic resin hollow body is equal to that of the container according to the embodiment of the present invention (two dotted lines are parallel lines in FIG. 4 and indicate the widths of the conventional example and the embodiment of the present invention, respectively). In the conventional example, the inner rectangle in the width direction of the toner container lid 41 and the toner container 42 is equal to W. In the embodiment of the present invention, the inner wall 51b, which is the inner rectangle of the upper container part 51, is formed. The distance W1 between the inner walls 51b is larger than the distance W between the inner walls of the conventional toner container, and the distance W2 between the inner walls of the lower container part 52 is the distance W between the inner walls of the conventional example.
Or greater than the distance W. Further, the synthetic resin hollow bodies of the conventional example and the present embodiment have the same height.

Accordingly, if the longitudinal dimension of the toner container 40 of the conventional configuration and the synthetic resin hollow body of the present embodiment in the longitudinal direction of the toner container 50 are the same, the inner volume F of the present embodiment as the container is larger than the inner volume E of the conventional example. Is also big.

Next, the operation of the above configuration at the time of injecting the molten resin for bonding will be described. No runner is shown in this example. A preferred embodiment for providing runners and gates will be described later. In any case, the gap 154a,
The joining molten resin is joined to the joining portions 154a and 154b through a molten resin injecting portion provided to penetrate the 154b and the outside.
And flows into the gap formed by the opposing surfaces between the molded articles that have come into contact with each other. At this time, the ribs 160b, 46b of the upper container part 51 are pressed by the pressure acting from the center of the gap formed by the facing surface between the molded products radially approaching or abutting at right angles to the flow direction of the molten resin when injected.
The rib 160d is deformed toward the inside of the container, but is closely attached to the back-up ribs 161a and 161b to prevent the deformation.
Pressing 1a, 161b increases the rigidity and strength of the container. Also, the ribs 160a and 160c of the lower container part 52 tend to be deformed outwardly of the container by the above pressure of the molten resin at the butting portion, but the outer surfaces of the ribs 160a and 160c are cured as shown in FIG. This is prevented by contacting the tool 200a. The backup rib 161a,
The height of the flange 161b from the flange surfaces 152a1 and 152c1 is preferably at least larger than the height of the ribs 160b and 160d. On the other hand, in order to increase the internal volume F of the inside 60a, the lower the backup ribs 161a and 161b, the better.

The ribs 160a and 160c on the outer peripheral side of the lower container part 52 are provided with abutting portions 154 serving as resin flow paths.
a and 154b receive pressure from the molten resin.
Since the deformed ribs 160a and 160c are in contact with 0a, the ribs 160a and 160c can adopt a smaller value among the thicknesses described above.

The material of such container parts is, for example, impact-resistant polystyrene. The material injected for bonding is, for example, polystyrene P without flame retardant.
S is adopted.

(Explanation of Injection Flow Path) In this embodiment, a resin injection flow path reaching a gap formed by a facing surface between molded products that are close to or in contact with each other is formed in one container part. The rib configuration around the gap formed by the opposing surfaces between the molded products that are close to or in contact with each other is the same as in the above-described embodiment, and the description of the above-described embodiment is cited for the rib configuration.

FIG. 2 is a perspective view showing the whole, and FIG.
FIG. 6 is a sectional view taken along line MM of FIG. 5, and FIG.
It is N sectional drawing.

In this embodiment, a resin injection flow path is formed in one of the container parts up to the gap formed by the facing surface between the molded products which are close or in contact with each other. A container formed in a direction perpendicular to the resin flow direction of the gap formed by the gap formed by the opposing surfaces between the mold and the gap formed by the opposing faces between the adjacent or abutting molded products, and in an assembly direction when the container parts are joined together. The structure was such that it penetrated between the component and the outside.

As shown in FIG. 2, the upper container part 51 has a jig 200a shown in FIG.
0, see FIG. 11) is provided with a molten resin inlet 200d of the molten resin injection flow path 200. That is, in this example in which the resin injection flow path is provided in one of the molded parts, the flange portion 152 (152b, 152b,
An inflow port 200d is provided in the container part 51 corresponding to an intermediate point in the direction along the edge of the container part 152d). The resin injection flow channel 200 provided toward the butting portion in each flange 152 is the same.
54a will be described. 154c is the butt 15
4a is an abutting portion in a direction perpendicular to the direction 4a. Each butt 154
Inspection port 160 for small hole from outside toward resin injection space
e, 160f are opened. Inspection port 160e, 16
0f is closed by the jig 200a. Therefore, it is determined whether or not the molten resin has spread to each of the molten resin injection sections 154 based on whether or not the inspection ports 160e and 160f are filled with the molten resin.

As shown in FIG. 6, a resin injection flow channel 200 is provided in a direction perpendicular to the resin flowing direction in the butting portion 154a. In this example, the resin injection channel 200 is in the vertical direction. The resin injection flow channel 200 is
And between the outer surface 51a, which is the outer side, and the butting portion 154a. In order to provide the resin injection channel 200, a columnar portion 51c is provided on the upper container part 51 from the flange portion 152b to the outer surface 51a (see FIG. 2). As shown in FIG. 5, the planar shape of the columnar portion 51c is an arc shape centered on the center line x of the resin injection channel 200, and the corner between the column portion 51c and the outer surface of the base material of the container part 51 is rounded with an arc R. is there.

The resin injection flow channel 200 has a large-diameter portion on the inflow portion 200d side and a small-diameter portion 200c on the side facing the butting portion 154a.
It is a tapered shape.

As shown in FIG. 7, each rib 160a, 160
The positions of b and 161a are the same as those in the above-described embodiment, but the backup rib 161a of the lower container part 52 is located.
Has no rounded corners. The rib 161a is provided with the rib 160b of the upper container part 51.
Backup rib 1 when assembling the two
Backup rib 1 so that it can easily enter the side of 61a.
61a is provided with a chamfer R1 and an inclined surface SL. As a result, due to the pressure of the resin flowing into the butting portion 154a, the tip side surface of the rib 160b of the upper container part 51 closely adheres to the root side surface of the backup rib 161a. Therefore, the backup rib and the rib of the upper container part are in good contact with each other over the entire joint portion of the container parts 51 and 52.

According to this embodiment, the gate 201 of the jig 200a is connected to the resin injection channel 200 on the outer surface 51a side of the upper container part 51, so that the side gate 72 is adjacent to the butting portion as shown in FIG. Further, it is not necessary to provide such a jig, and it is also possible to reduce the size of the jig used for joining the container parts 51 and 52 when viewed in the product projection area. On the other hand, in FIG.
2 is provided on the side of the butting portion 142a.
1. A runner must be provided in the radial direction from the outside of the container body 42, and the jig becomes large.

According to the present embodiment, the gate 201 of the jig is connected to the inlet 200 d of the resin injection channel 200 as shown by the arrow Q in FIG. When the molten resin flows into the resin injection flow channel 200, the resin injection flow channel 200 has a tapered taper. Is sealed near the small diameter portion 200c. Therefore, the resin injected and pressurized into the butting portion 154a does not flow backward to the resin injection channel 200, so that the ribs 160a and 16
0b are respectively pressed against the jig 200a (see FIG. 10A) and the backup rib 161a.
The resin of 4a solidifies.

(Explanation of Injection Pressure) According to the above-described embodiment, the resin flowing through the resin injection flow path 200 has the butting portion 154a.
In FIG. 8, as shown by an arrow 71b, the flow P collides with the flange 152a of the container part 52 on the lower side, and a force P acts on the flange 152a due to a change in the momentum of the molten resin. This force P is large because the flow velocity of the resin flowing through the resin injection channel 200 is large and the mass of the resin is also large.

In this embodiment, as shown in FIG. 10, the lower surface 171 of the flange 152a of the lower container part 52 is provided.
a (the lower surface 171b on the side of the flange 152c) was supported by a support surface 202b provided on the jig 200b to support the lower container part 52.

As described above, since the support surface 202b of the jig 200b is provided so as to cross the extension of the center line x passing through the gate of the jig and the resin injection flow path 200, the injected resin material becomes a jet. The pressure applied to the flange does not cause quality problems such as the flange being deformed because the flange is backed up by a jig, and there are no manufacturing restrictions such as selecting high-flow materials and increasing the number of gates. Even if the injection pressure is set higher than the normal molding injection pressure, no quality problem such as deformation occurs in the unit after joining.

Since the velocity energy of the resin flowing through the resin flow path, which is the butting portion, is rapidly lost and converted into a static pressure, the resin has a large pressure to press the peripheral wall of the butting portion. However, as described above, the ribs 160 of the upper container
b is backed up by the rib 161a of the lower container part 52.

In this embodiment, the flange portion 15 formed by the respective container parts 51 and 52 in the joint structure of the container.
Ribs 160a, 160b, 160c, 16 formed in the die-cutting direction from 2a, 152b, 152c, 152d, respectively.
The thickness of Od was 0.3 mm to 2.5 mm. When the joining material is injected into the butting portions 154a and 154b, the ribs are deformed by the pressure applied from the center of the butting portion in a direction perpendicular to the flow direction and radially, and the jig 200
a and the backup rib 161a of the mating container part
The joining material that is in close contact with the 161b and injected into the butting portions 154a and 154b does not leak to the inside and outside of the container. At this time, the backup ribs 161a and 161b
b and 160d, pressure is applied from the molten resin in the butting portions 154a and 154b.
The pressure is reduced by deforming 160d. The ribs 160a and 160d and the backup rib 161
After the a and 161b are in close contact, the ribs 160a and 160
b and the backup ribs 161a and 161b cooperate to oppose the pressure received from the molten resin in the butting portions 154a and 154b. In this example, the backup rib 161 is used.
The thicknesses of a and 161b are substantially the same as the thickness of the base material of the container component 52.

Next, an embodiment in which the sealing performance between the gate of the jig and the molded product as a container part around the gate is improved will be described.

(Description of Resin Inlet Area) FIG. 11 shows another embodiment.

The overall shape of the joint in this embodiment is substantially the same as that of FIG. 2, but the structure around the inlet of the resin injection flow channel 200 is different.

A jig 300 for holding the upper container part 51
A has a cylindrical projection 306b projecting downward.
A cylindrical recess 306 is provided at the center of the cylindrical protrusion 306b.
is provided at the center of the truncated cone 303 provided at the center of the bottom surface of the cylindrical recess 306a.
There is a.

A cylindrical boss 305 is provided around the inlet of the resin injection channel 200 of the container part 51 so as to fit into the cylindrical recess 306a of the jig with a gap. When the peripheral surface of the conical portion 303 of the jig 300a is pressed against the periphery of the inlet of the resin injection channel 200, the jig 300a
The distal end of the cylindrical projection 306b is separated from the container part 51. The jig 300a has a container part 51 on the upper side except for a portion where the peripheral edge of the inlet of the resin injection channel 200 and the conical portion 303 around the inlet 201a of the gate 201 are in contact.
Flange 152b and the rib 160 of the lower container part 52
Except for the part corresponding to the jig 300a, a sufficient space is provided between the jig 300a and the upper container part 51.

In this embodiment, a cylindrical concave portion having a diameter larger than that of the gate injection port is provided outside the gate injection port of the jig following the gate, and fitted into the cylindrical concave portion with a gap.
By providing a cylindrical boss whose tip abuts against the bottom of the concave portion around the inlet of the resin flow path of the container component, the container component 5
The resin is injected from the inlet of the resin injection flow channel 200 to the butting portions 154a and 154b formed by the first and the second 52 toward the butting portion, so that the container component 51 forming the resin injection flow channel 200 exerts a force in the outer peripheral direction. Jig 300a and container part 51
Cylindrical boss 305 around the inlet of the resin injection channel 200 of FIG.
Since the outer periphery and the inner periphery of the cylindrical concave portion 306a of the jig 300a are in close contact with each other, the resin does not leak to the outside of the container component 51 due to cracking or the like of the container component 51.

The gap between the cylindrical recess 306a of the jig 300a and the cylindrical boss 305 around the inlet of the resin injection flow path 200 of the container part 51 is preferably 0.
3 mm or less.

In the process cartridge shown in FIG.
A cleaning container 14 as a first frame body incorporating a cleaning blade 16, a charging unit 17, and a photosensitive drum 15
, The stirring members 50e, 50f (see FIG. 18), and the toner container 50 as a second frame in which the developer is incorporated. Provisional connection (same as the state of FIG. 20) is performed by abutting each other at 38. After that, the temporary joint is fitted into the above-mentioned jig, and in a positioned state, a molten resin material is injected into the butted portion and joined. Alternatively, the side covers 37 and 38 may be abutted in the jig after the cleaning container 14 and the toner container 50 are assembled in the jig.

In this case, the molten resin injection flow path 200 (not shown in FIG.
0d).

(Explanation of Resin Channel Inside Hollow Body) FIG. 1
(A) and FIGS. 2 and 3 show an embodiment of the present invention. This will be described. As described above, in the conventional method of joining a plurality of parts, for example, in the case of a hollow part, the joining material is injected into a space formed continuously or intermittently along the outer peripheral surface of the parts and joined.

In this embodiment, the spaces 154a and 154a shown in FIG.
A space is newly provided from 54b toward the inside of the hollow component.

This space is formed as follows.
FIG. 3B shows a view of the molded product 51 from below, and FIG.
FIG. 3 (a) shows a view of No. 2 from above. As shown in FIG. 3B, the ribs 160b and 160d in FIG.
Is composed. Further, as shown in FIG. 3, the ribs 161a and 161b in FIG. 3A also extend toward the inside of the molded product to form the convex portions 161a1 and 161b1. In this case, the outer space W3 formed by the ribs 160b facing each other is smaller than the inner space W4 formed by the ribs 161a facing each other, and W4> W3. In addition, the convex portions 160d1 and 161b1 are located at the same position. Convex parts 160b1, 161
Regarding a1, the positional relationship and the dimensional relationship with the convex portions 160d1 and 161b1 are the same. By doing so, the convex 160
The projections 161b1 and 161a1 are fitted to hold the outside of the projections 161b1 and 161a1. FIG. 1A shows a cross section of the inflow path in a state where these are combined.

In the case of the present embodiment, the condition of the combination of the two is such that the cross-sectional shape in the flow direction becomes an open shape in consideration of the variation of the molded product and the inside of the convex portions 160d1 and 160b1 and the inside of the convex portions 161b1 and 161a1. There is a gap between them. By doing so, there is no galling between the ribs during assembling, and the assembling property is improved. While the space that is the molten resin injection portions 154a and 154b extends in the cross direction with respect to the paper surface of FIG. 1A by the above-described configuration, the convex portions 160b1 and 160d1 intersect with this space and continue. The molten resin injection portions 154e and 154f, which are spaces inside,
It is configured toward.

In the above description, the convex portion of the resin component has a closed cross section perpendicular to the flow direction of the molten resin material in the resin flow path. However, as shown in FIG. Even in a shape in which the cross section perpendicular to the flow direction is open (when there is no apex of the convex part 160b1), the gap between the convex parts of the resin component is formed by the rib 160b due to the resin pressure and temperature when the joining resin is injected. The resin does not flow from the gap because it is deformed toward 161a. Further, as another embodiment, the present invention can be realized even when there is no gap (FIG. 24).
(B)). Even when there is no gap, assemblability is improved by providing a large taper in the rib 161a.
In the case of this embodiment, a configuration is provided in which a gap is provided by providing a taper to improve the assemblability as shown in FIG.

Since these ribs are also subjected to pressure in the direction in which the molded articles open due to the inflow of the joining material as described above, the ribs are received directly below the flow path by a jig (arrows Z1, Z2 in FIG. 2).
(The receiver is inserted in two directions.) Both molded products are prevented from opening.

In order to increase the rigidity after joining, it is advantageous that the flow path which is a space surrounded by the convex portions 160b1 and 160d1 is longer toward the inside of the container part. Due to the above restrictions, it is set to be within 0 to 30 mm.

In this case, in order to increase the rigidity, the two molded products, for example, the cleaning container 14, the toner container 50, and the side cover 38 can be combined with a resin.
Positioning part 3 that protrudes from side plate 38s and fits
8b, 38d molten resin injection part 154 near the boss
By providing the molten resin injection paths 38Y and 38Z, a synergistic effect of increasing the rigidity near the boss and increasing the rigidity by the boss is aimed at. In addition, the molten resin injection paths 38Y and 38Z are denoted by reference numeral 14Z in the cleaning
Is 50Y, and the injection paths 38Z and 14Z, 38Y
And 50Y together form a space into which the resin is injected.

In this case, the relationship between the boss and the injection path may be arranged so as to be in contact with the injection path as shown in FIG. That is, the protrusions 106d1 and 160b1 may be provided up to the boss 160z and the protrusion forming the hole 160y into which the boss 160z fits. Further, as shown in FIG. 22, the injection path may be merely brought close to the bosses 160z and 160y. Further, the injection path does not need to be formed in a straight line toward the center of the molded product. In some cases, the projections 160d1 and 161b1 are formed as shown in FIG.
May be configured in a crank shape. However, in this case, the loss at the corners of the flow channel is large, and the fluidity of the bonding resin is slightly lower than that of the straight shape. Therefore, it is necessary to devise an R shape at the corners.

In the manner described above, the space for the joining material is formed inside the hollow part from the outer peripheral surface, so that a joint is formed inside the hollow part as compared with the case where only the outer peripheral surface is joined. Increases rigidity.

[0088]

According to the present invention, the rigidity of the joint can be improved by arranging the joining flow path of the synthetic resin part joint toward the inside of the joint component.

According to the present invention, the above-described structure of the synthetic resin hollow body and the method of manufacturing the same are applied to an electrophotographic image forming apparatus, a toner supply container, and a process cartridge to obtain preferable results.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a resin component assembly, in which (a) shows an embodiment of the present invention and (b) shows a conventional example.

FIG. 2 is a perspective view of a resin component assembly.

3A and 3B show a resin component assembly, wherein FIG. 3B is a bottom view of the first component and FIG. 3A is a plan view of the second component.

4A and 4B are longitudinal sectional views of a resin component assembly, in which FIG. 4A shows an embodiment of the present invention, and FIG.

FIG. 5 is a plan view of a resin injection port.

FIG. 6 is a vertical sectional view showing a resin injection channel.

FIG. 7 is a longitudinal sectional view of a resin injection portion.

FIG. 8 is a longitudinal sectional view of a resin injection portion.

FIG. 9 is a longitudinal sectional view showing a gate of a conventional example.

FIG. 10 is a longitudinal sectional view showing a state where a resin-coupled component is set on a jig.

FIG. 11 is a longitudinal sectional view showing a state where a resin-coupled part is set on a jig.

FIG. 12 is a partial plan view of FIG. 11;

FIG. 13 is a longitudinal sectional view showing a molded part and a jig for setting the molded part.

FIG. 14 is a longitudinal sectional view showing the assembly of FIG.

FIG. 15 is a longitudinal sectional view of a molten resin injection section.

FIG. 16 is a longitudinal sectional view of a molten resin injection section.

FIG. 17 is a longitudinal sectional view of the electrophotographic image forming apparatus.

FIG. 18 is a longitudinal sectional view of a process cartridge.

FIG. 19 is an exploded perspective view of the process cartridge.

FIG. 20 is a perspective view of a process cartridge.

21 (b) is a bottom view and FIG. 21 (a) is a plan view of a molded article according to another embodiment of the present invention.

FIG. 22 (b) is a bottom view and FIG. 22 (a) is a plan view of a molded article according to another embodiment of the present invention.

FIG. 23 (b) is a bottom view and FIG. 23 (a) is a plan view of a molded product according to another embodiment of the present invention.

24 (a), (b), and (c) are longitudinal sectional views of a convex portion toward the inside of the container, showing the embodiment of the present invention.

FIG. 25 is a longitudinal sectional view of a conventional electrophotographic image forming apparatus.

[Explanation of symbols]

C: electrophotographic image forming apparatus D: joining part P: force Q: arrow R: arc R1: corner chamfering x: center line 1: feeding cassette 2: transfer material 3: feeding roller 4: feeding roller 5: Retard roller 6 Feed guide 7 Transport roller 8 Registration roller 9 Intermediate transfer member 10 Transfer roller 11 Elastic layer 12 Aluminum cylinder 13 Process cartridge 14 Cleaning container 14a Hole 14b Positioning portion 14c Side surface 14d: Removed toner reservoir 14e: Feed member 14h ...
Edge 15 Photosensitive drum 15a Flange 15a1 Center hole 15b Flange 16 Cleaning blade 17 Primary charging means 18 Image forming apparatus main body 19 Developing frame 19a Opening 19c Arm
19d hanging hole 19e projecting member 20 developing means 20a magnet roller 20b
Developing blade 20s Developing roller 20Y Color developing device 20M Color developing device 20C Color developing device 20YS Color developing device 20MS Developing roller 2
0CS Developing roller 20YR Coating roller 20YB
... developing blade 21B ... black developing unit 21BS ... developing roller 22 ... shaft 23 ... developing rotary 24 ... discharge unit 25 ... fixing device 26 ... fixing roller 27 ... pressure roller 28 ... heater 29 ... heater 30 ... scanner unit 31 ... polygon mirror 32 image forming lens 33 reflecting mirror 34 discharge roller 35 discharge roller 36 discharge roller 37 side cover 37a hole 37b positioning part 37c positioning part 37d positioning part 37e
... groove 37h ... edge 38 ... side cover 38a ... hole 38b-38d ...
Positioning portion 38h Edge 38Y, 38Z Flow path 39 Bearing member 39a Bearing member 39b Bearing member 40 Toner container 41 Toner container lid 42 Toner container 43 ... Shaft member 44 ... Seal member 50 ... Toner container 50a ... Positioning part 50b Positioning part 50c Opening part 50d One end face 50e, 5
0f: stirring member 50h: rim 51: toner container body (molded part, container part) 51a
... outer surface 51b ... inner wall 51c ... columnar portion 52 ... toner container lid (molded part, partner container part) 52
a ... inner wall 52b ... inner wall 55 ... gap cross-sectional area formed between molded products 60 ... inside 60a, 60b ... inside 70 ... arrow 71b ... arrow 72 ... side gate 104 ... photosensitive drum 105 ... rotary developing device 105M ... developing device 105C …
Developing device 105Y Developing device 105B Developing device 105
a: supply roller 105b: developing roller 105e ...
Shaft 142a: gap formed between molded products (butting part) 1
42b: gap formed between molded products 143a: flange 143b: flange 143c: flange 143d: flange 144a: convex 144b: convex 144c: convex 1
44d: convex portion 152: flange portion 152a: flange portion 152a
1: Flange surface 152b: Flange part 152b1
... Flange surface 152c ... Flange part 152c1 ...
Flange surface 152d ... Flange portion 152d1 ... Flange surface 154 ... Molten resin injection portion (butting portion) 154a ... Gap formed between molded products (molten resin injection portion, butting portion) 1
54b, 154c: gaps formed between molded products (molten resin injection portion, butting portion) 154e, 154f: inner side molten resin injection portion (butting portion, gap, space) 160: rib 160a: rib 160b: rib 16
0b1 ... convex part 160c ... rib 160d ... rib 1
60d1 ... convex part 161a ... backup rib 161a1 ... convex part 16
1b ... backup rib 161b1 ... convex part 160
e, 160f: Inspection port 171a, 170b: Lower surface 200: Injection channel 200a: Jig tool 200b: Jig tool 200c: Small diameter portion 200d: Inlet 200a1: Jig tool lower surface 201: Gate 201a: Injection port 202b: Jig tool support Surface 300: chamfering 300a: jig tool 301a, 301b: gap 303: conical portion 305: cylindrical boss 306a: cylindrical recess 306b: cylindrical protrusion 400: resin stopper rib 400a: notch

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H071 BA04 BA13 BA16 BA22 BA27 DA05 DA06 DA08 DA13 DA15 DA21 4F206 AD05 AD35 AG07 AG28 AH33 JA07 JB13 JB20 JM04

Claims (13)

[Claims] At least two or more molded products obtained by plastic injection molding are temporarily joined together, and the temporarily joined body is set on a jig different from a mold used for forming each molded product. In such a configuration, in a state where each molded product and the jig and tool are positioned and the molten resin is injected into the temporary coupling portion and coupled together, along the outer periphery of the molded product at the joint portion between the molded products. A component assembly formed by providing a space between molded products in a joint portion, providing a space from the space toward the inside of the combined product, and injecting a molten resin material into each of the spaces to connect the molded products to each other. 2. At least two or more molded articles obtained by plastic injection molding are temporarily joined together, and the temporary joined body is set on a jig different from a mold used for forming each molded article. In the state where each molded product and the jig and tool are positioned in that state, the molten resin is injected into the temporary coupling portion and coupled thereto, and the first and second molded products are provided along the periphery. Each of the first molded articles has a predetermined interval facing each other, and a pair of ribs extending continuously from the ribs to the inside of the molded article. The second molded product faces each other and has a fixed interval shorter than the interval, and the pair of convex portions is formed by a rib continuously extending from the overlapping rib to the inside of the molded product. The second molded article Is formed by stacking the projections of the first frame and the second frame so that the projections of the first molded product cover the projections of the first molded product. A synthetic resin component assembly characterized by having a configuration in which a resin material is injected and joined. 3. The synthetic resin component assembly according to claim 2, wherein the cross section perpendicular to the flow direction of the molten resin material in the space has a closed shape. 4. The synthetic resin component assembly according to claim 2, wherein a cross section perpendicular to the direction of flow of the molten resin material in the space has an open shape. 5. The synthetic resin component coupling according to claim 3, wherein the space is provided so as to extend toward a fitting portion for positioning the synthetic resin component coupling members. body. 6. A process cartridge detachable from a main body of an image forming apparatus, comprising: an electrophotographic photosensitive drum; process means acting on the electrophotographic photosensitive drum; and a plurality of moldings for supporting the electrophotographic photosensitive drum or the process means. And a frame body formed by joining the articles, wherein the frame body temporarily joins at least two or more molded articles obtained by plastic injection molding to form each of the temporary joined bodies. In a configuration in which the mold is set on a jig different from the mold used to perform the molding, and in that state, the molded resin and the jig are positioned and the molten resin is injected into the temporary joint and joined. The first and second molded articles each have a rib overlapping on the inner peripheral side along the resin injection portion of the joint provided along the periphery, the first molded articles have a certain interval facing each other, rib Forming a pair of projections with ribs extending continuously from the inside to the inside of the molded article, wherein the second molded article faces each other and has a certain interval shorter than the interval, and Forming a pair of convex portions with ribs extending continuously to the first frame and the second frame such that the pair of convex portions in the first molded product cover the pair of convex portions in the second molded product It is characterized in that it has a configuration in which a molten resin material for bonding is injected into a space facing the inside of the combined body formed by overlapping the convex portions of the body and joined together, and a synthetic resin component combined body is provided. And process cartridge. 7. The process cartridge according to claim 6, wherein a cross section perpendicular to the flow direction of the molten resin material in the space has a closed shape. 8. The process cartridge according to claim 6, wherein a cross-section perpendicular to the flow direction of the molten resin material in the space is open. 9. The process cartridge according to claim 7, wherein the space is provided so as to extend toward a fitting portion for positioning the synthetic resin component assemblies. 10. An electrophotographic image forming apparatus which detachably attaches a process cartridge and forms an image on a recording medium, comprising: an electrophotographic photosensitive drum; a process means acting on the electrophotographic photosensitive drum; And a frame formed by joining a plurality of molded articles supporting the process means, wherein the frame temporarily joins at least two or more molded articles obtained by plastic injection molding. Is set in a jig different from the mold used to form each molded product, and in that state, the molten resin is applied to the temporary joint portion in a state where each molded product and the jig are positioned. In the configuration of injecting and joining, the first and second molded articles each have a rib overlapping on the inner peripheral side along the resin injection section of the joint provided therearound, and the first molded articles are opposed to each other. With a constant spacing, a pair of convex portions is constituted by a rib continuously extending from the rib to the inside of the molded product, the second molded product is opposed to each other, and has a fixed interval shorter than the interval, A pair of convex portions is formed by ribs extending continuously from the overlapping ribs to the inside of the molded product, and a pair of convex portions in the second molded product are covered by the pair of convex portions in the first molded product. A synthetic resin component joined body that is configured to inject and join a molten resin material for joining into a space facing the inside of the joined body formed by overlapping the protrusions of the first frame and the second frame. An electrophotographic image forming apparatus, comprising: mounting means for detachably mounting a process cartridge having the same; and transport means for transporting a recording medium. 11. The electrophotographic image forming apparatus according to claim 10, wherein a cross section perpendicular to the flowing direction of the molten resin material in the space has a closed shape. 12. The electrophotographic image forming apparatus according to claim 10, wherein a cross-section perpendicular to the flow direction of the molten resin material in the space has an open shape. 13. The electrophotographic image forming apparatus according to claim 11, wherein the space is provided so as to extend toward a fitting portion for positioning the synthetic resin component assemblies.