JPH0712108A - Fastening device for unit parts - Google Patents

Abstract

PURPOSE:To enable the reuse of a unit and unit material by fastening a plurality of unit parts together by means of a fastening member in the condition that it can be cut from outside of the unit parts. CONSTITUTION:An image forming unit 1 is formed by fastening an upper cover 12 to a lower cover 13. A band-like groove 14 is previously formed on an outer- fitting cover 11 so as to bridge the upper and lower covers 12, 13 when the upper cover 12 is connected to the lower cover 13. The groove 14 serves as a holding part with holds a band-like fastening member 16 at a fastening position. The fastening member 16 is prevented from displocating or escaping through winding along the groove 14. The image forming unit 1 is recovered for decomposition, cleaning, exchange of parts. In the case of decomposition, the outer fitting cover 11 is decomposed to the upper cover 12 and the lower cover 13 only by cutting the fastening member 16 made of synthetic resin. The decomposition is facilitated and operation time is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening device for fastening a plurality of unit parts constituting a functional unit mounted on an image forming apparatus body to each other.

[0002]

2. Description of the Related Art In recent years, it has become more and more important to tackle environmental problems represented by environmental pollution and effective use of resources. With regard to OA equipment which is an image forming apparatus such as a copying machine, a facsimile and a printer. Is required without exception. Therefore, in these OA equipments, many measures are being studied to recycle the whole or a part of the equipment to make it one of the solutions to the environmental problem on the premise of effective use of resources. Units such as copiers, facsimiles, process cartridges, etc., which have been used up to now, are naturally targets of such recycling.

Some of these units are covered with an exterior cover formed by fastening divided cover members as a plurality of unit parts. In the conventional fastening of the split cover member, since the split cover member is made of plastic, many fastening is performed by caulking with a fastening member integrally formed with the split cover member. Further, there is also one in which the split cover member is fastened with screws.

[0004]

However, the former fastening by caulking has a high possibility of breaking the fastening member at the time of disassembly, and if this is broken, refastening cannot be performed, which causes a problem in recycling. . Also, since the latter screwing can be disassembled by assembling and removing the screw, there is no problem that it cannot be re-fastened, but the cost is higher than the former fastening method, and the disassembling and assembling time is also longer. There was a problem of this. Further, in the screwing, since the metal screw receiver is inserted into the plastic, there is a problem that the plastic cannot be melted and the material cannot be reused.

In view of the above-mentioned conventional problems, the present invention facilitates the work of assembling and disassembling the unit parts constituting the unit, and facilitates the reuse of the unit and the reuse of the unit material. It is an object of the present invention to provide a fastening device between unit parts that can be used in the above.

[0006]

In order to achieve the above object, the present invention provides a fastening device for fastening a plurality of unit parts constituting a functional unit mounted on an image forming apparatus main body to each other. The unit parts are fastened with a cord-shaped or band-shaped fastening member, and the fastening members are fastened in a state in which they can be cut from the outside of the unit components.

Further, in order to achieve the above object, the present invention is characterized in that a band-shaped fastening member is attached along the joint surface between the unit parts.

Furthermore, in order to achieve the above-mentioned object, the present invention is a fastening member made of a material having heat shrinkability between the plurality of unit components, and the fastening member can be cut from the outside of the unit component. It is characterized in that it is fastened in such a state.

Furthermore, in order to achieve the above object, the present invention is characterized in that the fastening member is formed in a string shape.

Further, in order to achieve the above object, the present invention is characterized in that the fastening member is formed in a tubular shape.

Further, in order to achieve the above-mentioned object, the present invention is characterized in that fastening holes are formed in the plurality of unit parts,
It is characterized in that the string-shaped fastening member made of a material having heat shrinkability is passed through the fastening hole to fasten the unit parts.

Further, in order to achieve the above object, the present invention is characterized in that the plurality of unit parts are provided with a projecting portion whose front end side is bent, and the projecting portion has a cylindrical shape made of a material having heat shrinkability. The fastening member is fitted to fasten the unit parts.

Furthermore, in order to achieve the above object, according to the present invention, at least one fastening position of the plurality of unit parts extends in a direction substantially orthogonal to the fastening direction of the fastening member and a cutting tool can be inserted. It is characterized in that a large groove is formed.

Furthermore, in order to achieve the above-mentioned object, the present invention provides the unit parts by forming a brim part on the joint surface of the unit parts and sandwiching the brim parts with a detachable holding member. It is characterized by fastening between.

Furthermore, in order to achieve the above object, the present invention is a fastening device for unit parts, characterized by comprising a sealing means for hermetically sealing the joint part when the unit parts are fastened.

Further, in order to achieve the above object, the present invention provides that the sealing means is provided in a groove formed in a joint surface between the unit parts and in the groove when the unit parts are fastened. It is characterized in that it is configured with a detachable sealing member that is pressed against.

Furthermore, in order to achieve the above object, the present invention provides that the sealing means is formed in a groove formed in one joint surface of the unit component and in the other joint surface of the unit component. And a sealing member that is in pressure contact with the groove when the unit parts are fastened together.

Furthermore, in order to achieve the above object, the present invention provides that the sealing means is provided with a concave groove formed in the joint surface of the split cover member, and presses into the concave groove when expanded and contracts when contracted. It is characterized in that it is constituted by a balloon type sealing member which is released from pressure contact with the concave groove.

[0019]

According to the above construction, since a plurality of unit parts are fastened together by a string-shaped or band-shaped fastening member and the fastening members are severable from the outside of the unit parts, the unit Not only the fastening work between the parts but also the fastening member of the string-shaped body or the band-shaped body can be cut at the time of disassembling the unit, so that the disassembling time is shortened.

[0020]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an explanatory diagram showing a main part of an image forming apparatus according to the present invention. In FIG. 1, reference numeral 1 is an image forming unit, 2 is an optoelectronic device unit, and 3 is a transfer fixing unit. The image forming unit 1 is integrally provided with an OPC belt 4, which is a photoconductor, and a charger 5, a cleaning device 6, and a developing device 7, which are provided around the OPC belt 4. The optical electrical unit 2 includes an optical system 8 for writing, a circuit board (not shown), a power supply, a drive motor, and drive transmission gears. The transfer fixing unit 3 includes a heat roller fixing device 9
Then, the transfer roller 10 is built in. Transfer roller 10
A transfer charger may be used instead of. Optical electrical unit 2
Since the transfer fixing unit 3 is provided with the durable parts, it is continuously used until the durable parts reach the end of their lives.
However, the toner of the image forming unit 1 is a consumable item, and the life of parts in the image forming unit 1 is designed according to the amount of toner consumed, so that the image forming unit 1 is frequently replaced.
The replaced image forming unit 1 is cleaned inside the unit, cleaned or replaced with parts and members, and regenerated as a reusable unit.

FIG. 2 shows an example of the assembling of these units 1, 2 and 3. In the image forming unit 1 having a high replacement frequency, an arrow is drawn between the optical and electrical unit 2 and the transfer fixing unit 3 having a low replacement frequency. It is attached so that it can be detached from the direction. Reference numeral 2a is a drive system storage portion of the optoelectronic device unit 2. Since the image forming apparatus is not provided with a cover that covers all of the units 1, 2, and 3, the image forming unit 1 is required to be shielded from light and airtight. That is, if the image forming unit 1 has a poor light shielding property, the image quality deteriorates, and if the airtightness is poor,
Toner may leak.

The image forming unit 1 is one of its own parts.
It is covered with the outer cover 11, which is one of the
As shown in FIG. 3, in the present embodiment, the reference numeral 1 is composed of an upper cover 12 and a lower cover 13 which are divided into two upper and lower parts. The OPC belt 4 is attached to the upper cover 12, and the cleaning device 6 and the developing device 7 are provided in the lower cover 13.
Etc. are provided, and the image forming unit 1 is completed by fastening the upper cover 12 and the lower cover 13.

Therefore, the outer cover 11 is formed with band grooves 14 and 15 that extend over both covers when the upper cover 12 and the lower cover 13 are joined in advance.
Reference numerals 4 and 15 are provided near both sides of the image forming unit 1, respectively. The band grooves 14 and 15 are configured as a holding portion that holds the band-shaped fastening member 16 at the fastening position. By winding the band-shaped fastening member 16 along the band grooves 14 and 15, It is prevented from slipping out due to misalignment.

A ring-shaped elastic rubber material may be used as the belt-shaped fastening member 16, and the upper cover 12 and the lower cover 13 may be fastened by the elastic force. However, if an elastic rubber material is used for the fastening member 16, the elastic force of the rubber material may change over time, and the rubber material may be cut due to deterioration, which is not preferable. For this reason, in this embodiment, the fastening member 16 is made of synthetic resin, but does not stretch in the winding direction. Then, the band-shaped fastening member 16 may be wound around both covers at the positions of the band grooves 14 and 15, and the fastening members 16 may be bonded to each other by bonding or heat fusion. However, since the work of adhering or heat-sealing the fastening members 16 without slack is troublesome, they may be fixed by a known clip or fastener.

Further, as shown in FIG. 4, it is also possible to use a fastening member 16 formed in a ring shape in advance. In this case, since the ring-shaped fastening member 16 needs to be formed with a circumferential length that can be fitted from the side portion of the image forming unit 1, it becomes loose at the positions of the band grooves 14 and 15 after fitting. This slack is absorbed by using a clip having a slack absorbing function, and FIG. 5 shows an example of the clip.

In FIG. 5, the clip 17 is known per se and its detailed description is omitted.
Is composed of a pipe 18 and a fixture 19 provided with a tab 20 for fixing the pipe 18 from the outside. Then, the clip 17 presses the pipe 18 around which the fastening member 16 is wound with the fixture 19, and sets the fixture 20 so that the fixture 19 does not open. At this time, the band groove 1
If the diameter of the pipe 18 is selected in consideration of the circumferential lengths of the positions 4, 15 and the circumferential length of the fastening member 16, the looseness of the fastening member 16 can be reliably absorbed. The clip 17 is shown in FIG.
As shown in FIG. 5, instead of the pipe 18, when the upper cover 12 and the lower cover 13 are joined, a cylindrical protrusion 21 is formed at the joint, and the fastening member 16 is wound around the protrusion 21. You may make it hold down with the fixing tool 19.

As described above, the image forming unit 1 fastened by the belt-shaped fastening member 16 is recovered and disassembled, cleaned, and parts are replaced, but when the image forming unit 1 is disassembled. Can cut the outer cover 11 into the upper cover 12 and the lower cover 1 only by cutting the fastening member 16 made of synthetic resin.
It is divided into three. Therefore, the disassembly work is extremely simple and can be performed in a short time. If a cutter groove 12a that crosses the band grooves 14 and 15 is formed at an appropriate position on the upper cover 12 (see FIGS. 3 and 4) so that a cutter blade or the like can be easily inserted, the fastening member can be more easily attached. 16 can be cut.

FIG. 7 is a perspective view showing another embodiment of the present invention. In this embodiment, a projection 22 is provided on at least the upper cover 12 instead of the band grooves 14 and 15, and a band-shaped fastening member 16 is provided.
A hole 23 provided so as to fit into the protrusion 22 is formed in the. The protrusion 22 and the hole 23 form a holding portion for holding the fastening position of the fastening member. Further, as shown in FIG. 8, the holding portion formed by the protrusion 22 and the hole 23 is
It can also be applied to the case where the fastening members 16 are fastened along the joint surface between the upper cover 12 and the lower cover 13.

FIG. 9 is a perspective view showing another embodiment of the present invention. In this embodiment, a fastening hole 24 as a holding portion is provided at a common position when the upper cover 12 and the lower cover 13 are joined. ing. Then, a string or band fastening member may be tied so as to pass through the fastening hole 24. At this time, a commercially available fastening band 25 can be used as the fastening member. If the commercially available fastening band 25 is used, the fastening is easy, and the band portion is made of a nylon resin material.
It can be easily cut with scissors. Also, the fastening hole 2
If 4 is provided at a plurality of locations, fastening strength can also be obtained. Furthermore, if the position of the fastening hole 24 is lowered by a distance L from the surface of the upper cover 12 and the distance L is made larger than the height width of the fastening portion 25a of the fastening band 25, the fastening portion 25a projects onto the surface of the upper cover 12. It is advantageous without doing.

FIG. 10 is a perspective view showing another embodiment of the present invention. The side plate constituting the exterior cover of the developing device 7 is divided into upper and lower side plates 7a and 7b. In this embodiment, the side plate 7a is , 7b are fastened. Side plates 7a, 7
A protruding portion 26 is formed on b at the time of joining them, and a hole 27 is formed at the same position on the protruding portion 26. Then, the string 2 made of a heat shrinkable member as a fastening member is provided in both holes 27 of the side plates 7a and 7b.
This string 28 is tied through 8 pieces. At this time, if the string 28 is tied by a general knotting method, it is inevitable that the tied string 28 is loosened, and the fastening for securely holding the developing device side plate cannot be performed. However, since the string 28 is made of a heat-shrinkable member in this example, as shown in FIG. 11, the string 28 contracts by being heated by a heating means such as a dryer 29, and the string 2 is tied.
8 also does not loosen, and the developing device side plate is firmly fastened.

Thus, the developing device side plates 7a and 7b can be fastened without slack with the cord 28 made of a heat shrink member, and the fastening work can be performed easily and in a short time. Also, the developing device 7 tied with a string 28
When disassembling, the string 28 only needs to be cut with a cutter or scissors, and the operation is simple. However, if the string 28 is in close contact with the protruding portion 26, cutting with a cutter or scissors is not always easy.

Therefore, as shown in FIG. 11, the protrusion 26 is provided with two slots 29 into which the cutter blades can be inserted in this embodiment, and the slots 29 are inserted along the slots. The cutter blade is provided so as to hit the string 28 in the hole 27 portion at a right angle to the fastening direction.

According to this structure, if the cutter blade is inserted through the long slot 29 which is easy to work in the A direction or the B direction, the cutter blade hits the protrusion 26 substantially at right angles to the fastening direction of the string 28. Even the tightly attached string 28 can be easily cut.

FIG. 12 is a modification of the embodiment shown in FIG. 10, and in this embodiment, a fastening tube 30 made of a heat-shrinkable member and formed in a tubular shape is used as the fastening member. On the other hand, the developing device side plates 7a and 7b to be fastened each have a protrusion 31 having an L-shaped cross section, the tip ends of which are bent in opposite directions. Then, a groove 32 having an appropriate width is formed at the joint surface portion of the projecting portion 26, and the groove 32 serves as a hole for inserting a cutter blade when the developing device 7 is disassembled.

According to this structure, as shown in FIG. 13, when the assembly 26 is assembled, the fastening ring 30 is hooked on the protruding portion 26 and heated by the dryer 29 to shrink the fastening cylinder 30 and tighten the tightly joined fastening cylinder 30 without loosening. The developing device side plate can be firmly fastened. Further, when the developing device 7 is disassembled, the groove 3
The fastening cylinder 30 can be easily cut by simply inserting the cutter blade into the second unit, and the assembling and disassembling of the developing device 7 becomes extremely easy. The fastening shown in the embodiments of FIGS. 9 and 12 can naturally be applied to fastening the outer cover of the image forming unit 1 and other units.

By the way, the image forming unit 1 and the exterior cover 1
In the case of No. 1 or the developing device side plate, if the light-shielding property and the airtightness of the joint surface such as the divided cover are insufficient, there is a risk of light leakage or toner leakage.

Next, an example will be described in which good light-shielding properties and airtightness of the joint surface can be obtained. In FIG. 14, a hole having a circular cross section is formed near the joint surfaces of the upper and lower covers 12 and 13 over substantially the entire circumference of the joint surface, and a groove is formed from each joint surface toward the hole. A groove 33 is provided. The sealing groove 33 is formed so as to have a substantially eight shape when the upper and lower covers 12 and 13 are combined.
A balloon-shaped sealing member 34 made of rubber, vinyl, or the like, which can be freely attached and detached, is fitted into the sealing groove 33. The sealing member 34 includes two expansion / contraction portions 34a having a circular cross section and the two expansion / contraction portions. A communication portion 34b that communicates 34a with the communication portion 3
4b and a thick portion 34c provided on one side.

When the upper and lower covers 12 and 13 are fastened, the expansion / contraction part 34a of the sealing member 34 is mounted so as to fit in the position of the circular hole of the sealing groove 33 in cross section. At this time, the sealing member 34 is in a contracted state as shown in FIG.
Here, air is put into the sealing member 34 to expand it. When the sealing member 34 expands, as shown in FIG.
4a is brought into pressure contact with the sealing groove 33, whereby good light-shielding property and airtightness can be obtained in the joint portion of the upper and lower covers 12 and 13. In addition, if air is taken in and out of the sealing member 34 by piercing the thick portion 34c with a needle, the thick portion 3 can be removed when the needle is pulled out.
Since the needle hole is closed by the elasticity of 4c, the thick portion 34c
Air can be taken in and out without damaging the. Moreover, the thick portion 34c is also used for positioning when the upper and lower covers 12 and 13 are joined.

FIG. 16 shows another embodiment for obtaining the light shielding property and airtightness of the joint surface. In this embodiment, a sealing member 35 in which an elastic body such as rubber is provided so as to form a fold shape is used. ing. On the other hand, a sealing groove 36 having a semicircular cross section is formed on the joint surface of the upper and lower covers 12 and 13 over substantially the entire circumference thereof. The sealing member 35 includes a base portion 35a having an elongated rectangular cross section.
Is formed on both sides with folds 35b extending forward,
It has a length over the entire circumference of the joint surface of the upper and lower covers 12 and 13.

According to this structure, when the sealing member 35 is set along the sealing groove 36 of the upper and lower covers 12 and 13 and the upper and lower covers 12 and 13 are fastened, the folds 35b of the sealing member 35 are formed as shown in FIG. The tip end side of is elastically deformed along the sealing groove 36, and the fold portion 35b is pressed against the sealing groove 36.
As a result, good light-shielding property and airtightness can be obtained at the joint between the upper and lower covers 12 and 13.

FIG. 18 is a modified example of the embodiment shown in FIG. 16, and in this example, a fold portion 37 as a sealing member is provided at one joint of the upper and lower covers 12 and 13, and the other joint is hermetically sealed. A groove 38 is formed.

According to this structure, since the fold portion 37 is provided on the cover, only by fastening the upper and lower covers 12 and 13, good light-shielding property and airtightness can be obtained at the joints between the upper and lower covers 12 and 13. . The fold portion 37 can be made of a material different from that of the cover, but if it is formed integrally with the cover, it is not necessary to separate the fold portion 37 when the resin material of the cover is melted and reused. It's Yuri.

FIG. 19 shows still another embodiment for obtaining the light shielding property and the airtightness of the joint surface. In this embodiment, the upper and lower covers 1 are provided.
A brim portion 39 is formed on the joint surface between the two and 13. Then, by gripping the brim portion 39 with a holding strip 40 having a U-shaped cross section as a holding member,
The upper and lower covers 12 and 13 are fastened with good light-shielding property and airtightness. In this case, the holding strip 40 has a brim portion 3
A slip stopper 41 is formed on the surface that holds the grip 9, and the slip stopper 41 prevents the grip strip 40 from coming off after fastening.

The upper and lower covers 1 are held by holding the brim portion 39.
In order to prevent the end portions of the gripping strips 40 that fasten the screws 2 and 13 from coming off, in the embodiment shown in FIG.
Make a notch 42 at the end of the
Then, a cap 43 that encloses the brim portion 39 and the holding strip 40 together is attached.

With this structure, the cap 43
Since the holding strip 40 holding the brim portion 39 is held, it is possible to reliably prevent the end portion of the holding strip 40 from coming off.

The fastening between the covers has been described above as the fastening between the unit parts, but since the two outer covers are positioned with respect to each other, it is necessary to provide a member capable of aligning the covers on the cover joining surface. . As this member, it is possible to perform alignment by engaging with bearings of image forming parts housed in the upper and lower covers and concave and convex grooves for supporting the parts.

If the upper and lower covers are assembled in the state shown in FIG. 1 with improved airtightness and light shielding, the light shielding at the joint between the image forming unit and the fixing transfer unit is impaired. In this case, an opening / closing shutter that opens only when the paper passes through the paper feed port can be provided to maintain the light blocking effect. Further, in the image forming unit, since the cleaning blade of the cleaning section and the developing roller are in contact with the OPC belt which is a photoconductor, the light shielding property is maintained at these places.

[0048]

According to the first aspect of the present invention, the plurality of unit parts are fastened together with the fastening member having a string-shaped body or a band-shaped body, and the fastening member can be cut from the outside of the unit component. Since it is fastened, the fastening member is simply cut at the time of disassembling as well as assembling, so that the work of assembling and disassembling is easy and the recycling is easy.

According to the second aspect of the present invention, the plurality of unit parts are fastened together by attaching the belt-shaped fastening members along the joint surface, so that the assembly and disassembly work is easy and the recycling is easy. Moreover, it is possible to improve the airtightness and the light shielding property of the joint surface.

According to the third to fifth aspects of the invention, the plurality of unit parts are fastened together with a fastening member made of a material having a heat shrinkability, and the fastening members are fastened in a state in which they can be cut from the outside of the unit parts. As a result, the work of assembling and disassembling becomes easier, and the recycling is easy.

According to the sixth aspect of the invention, the fastening holes are formed in the plurality of unit parts, and the fastening holes made of a material having heat shrinkability are passed through the fastening holes to fasten the unit parts. Therefore, especially the assembling work becomes easier.

According to the seventh aspect of the present invention, the plurality of unit parts are formed with the projecting portions whose front ends are bent, and the tubular fastening members made of a material having heat shrinkability are fitted to the projecting portions. Since the unit parts are fastened together with each other, the assembling work becomes particularly easy.

According to the structure of claim 8, at least one fastening position of the plurality of unit parts is formed with a groove extending in a direction substantially orthogonal to the fastening direction of the fastening member and into which the cutting tool can be inserted. A projecting portion whose front end is bent is formed on the plurality of unit parts, and a tubular fastening member made of a material having heat shrinkability is fitted to the projecting parts to fasten the unit parts together. Will be easier.

According to the structure of claim 9, the brim portions are formed on the joint surfaces of the unit parts, and the brim parts are sandwiched by the detachable holding members, so that the unit parts are fastened together. Assembling and disassembling operations are easy, recycling is easy, and the airtightness and light shielding of the joint surface can be improved.

According to the structure of claim 10, when the unit parts are fastened, the plurality of unit parts provided with the sealing means for hermetically sealing the joints are joined together by the belt-shaped fastening members along the joint surfaces. Since it is attached, the airtightness and the light shielding property of the joint surface can be improved.

According to the eleventh to thirteenth aspects, the assembling and disassembling operations are simple, the recycling is easy, and the airtightness and the light shielding property of the joint surface can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a main part of an image forming apparatus according to the present invention.

FIG. 2 is a perspective view showing an example of assembly of the unit.

FIG. 3 is a perspective view showing a divided cover of the image forming unit.

FIG. 4 is a perspective view showing an example in which a fastening member formed in a ring shape is used.

FIG. 5 is an explanatory view showing an example of a clip having a slack absorbing function for a fastening member.

FIG. 6 is an explanatory diagram showing a modified example of FIG.

FIG. 7 is a perspective view showing another embodiment of the present invention.

FIG. 8 is a perspective view showing a modified example of FIG.

FIG. 9 is a perspective view showing still another embodiment of the present invention.

FIG. 10 is a perspective view showing still another embodiment of the present invention.

FIG. 11 is a perspective view showing the state of fastening of FIG.

12 is a perspective view showing a modified example of the embodiment shown in FIG.

13 is a cross-sectional view showing the state of fastening in FIG.

FIG. 14 is a cross-sectional view at the time of contraction showing an embodiment capable of obtaining the light-shielding property and airtightness of the present invention.

15 is a cross-sectional view of FIG. 14 when inflated.

FIG. 16 is an explanatory view of a sealing member showing another embodiment for obtaining the light shielding property and airtightness of the present invention.

FIG. 17 is a cross-sectional explanatory view showing the state of fastening in FIG.

FIG. 18 is a cross-sectional explanatory view showing a modified example of the embodiment shown in FIG.

FIG. 19 is a perspective view showing still another embodiment for obtaining the light shielding property and airtightness of the present invention.

FIG. 20 is a perspective view showing the state of fastening of FIG.

FIG. 21 is a perspective view showing the state of fastening of FIG.

[Explanation of symbols]

 1 Image forming unit 7 Developing device 7a, 7b Side plate of developing device 11 Exterior cover 12 Upper cover 13 Lower cover 16 Fastening member 25 Fastening band 28 String 30 Fastening cylinder 34, 35 Sealing member 40 Holding strip

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hidetoshi Yano 1-3-6 Nakamagome, Ota-ku, Tokyo Within Ricoh Co., Ltd. (72) Yasuo Kawata 1-3-6 Nakamagome, Ota-ku, Tokyo Shares In the Ricoh Company (72) Inventor Hidenori Sakai 1-3-6 Nakamagome, Ota-ku, Tokyo Stock Company Ricoh (72) Inventor Fumio Kurizumi 1-3-6 Nakamagome, Tokyo Stockholder, Ricoh Company

Claims (13)

[Claims] 1. A fastening device for fastening a plurality of unit parts constituting a functional unit mounted on an image forming apparatus main body to each other, wherein the plurality of unit parts are a string-shaped or band-shaped fastening member. And the fastening member is fastened in a state in which the fastening member can be cut from the outside of the unit component. 2. A belt-shaped fastening member is attached along a joint surface between the unit parts.
The fastening device between the unit parts according to. 3. A fastening device for fastening a plurality of unit parts constituting a functional unit mounted on the main body of an image forming apparatus between the plurality of unit parts, wherein the plurality of unit parts are made of a heat-shrinkable material. A fastening device between unit parts, which is a member and is fastened in a state in which the fastening member can be cut from the outside of the unit part. 4. The fastening device between unit parts according to claim 3, wherein the fastening member is formed in a string shape. 5. The fastening device between unit parts according to claim 3, wherein the fastening member is formed in a tubular shape. 6. A fastening hole is formed in the plurality of unit parts, and the fastening member in the form of a string made of a material having heat shrinkability is passed through the fastening holes to fasten the unit parts. The fastening device between unit parts according to claim 3 or 4. 7. A plurality of unit parts are formed with a projecting portion whose front end side is bent, and the tubular fastening member made of a material having a heat shrinkability is fitted to the projecting parts so as to connect the unit parts. The fastening device between unit parts according to claim 3 or 5, which fastens. 8. At least one of the plurality of unit parts
8. The fastening between the unit parts according to claim 1, wherein at one fastening position, a groove extending in a direction substantially orthogonal to the fastening direction of the fastening member and into which a cutting tool can be inserted is formed. apparatus. 9. A fastening device for fastening a plurality of unit parts constituting a functional unit mounted on an image forming apparatus main body to each other, wherein a brim portion is formed on a joint surface of the unit parts, A fastening device between unit parts, wherein the brim part is sandwiched between removable holding members to fasten the unit parts together. 10. A fastening device for fastening a plurality of unit parts constituting a functional unit mounted on the main body of an image forming apparatus to each other, wherein a sealing means for sealing a joint portion when the unit parts are fastened. A fastening device between unit parts characterized by being provided. 11. The sealing means comprises a recessed groove formed in a joint surface between the unit parts, and a detachable sealing member that presses into the recessed groove when the unit parts are fastened together. The fastening device between unit parts according to claim 10, wherein 12. The sealing means is formed in a concave groove formed in one joint surface of the unit component and in the other joint surface of the unit component, and the concave portion is formed at the time of fastening between the unit components. The fastening device between unit parts according to claim 4, wherein the fastening device is configured by a sealing member that is pressed against the groove. 13. A balloon-type seal in which the sealing means is formed with a concave groove formed in a joint surface of the split cover member and is pressed against the concave groove when expanded and released from the concave groove when contracted. The fastening device between unit parts according to claim 4, wherein the fastening device is composed of a member.