JPH07271131A - Production of frame body and frame body and image forming device - Google Patents

Abstract

PURPOSE:To make it possible to provide a device body with a large opening and to improve workability by subjecting two sheets of strips respectively to prescribed working, then bending these strips to an angle steel shapes or channel steel shapes to form bars and joining two pieces of these bars by welding, thereby forming the hollow frame material. CONSTITUTION:A female screw thread member consisting of a square thick plate provided with screw threads meeting the hole of an intermediate member formed by blanking is fixed to this intermediate member by welding, etc., to form the prescribed intermediate member. This intermediate member is bent to an L-shaped section longitudinally by a press in such a manner that the internal screw thread part exists on the inner side, by which the bar 100a of the intermediate member is formed. The prescribed intermediate member is bent longitudinally to the L-shaped section by the press to form the bar 100b of the intermediate member. The respective flange ends of the bars 100a, 100b are mated and welded to form a vertical frame 102 of a hollow square cylinder. As a result, the notches formed at blanks are mated and are formed to notches 52, by which the internal screw threads are made on the inner side of the holes 54 and the internal screw thread members are fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine.

[0002]

2. Description of the Related Art In recent years, an image forming apparatus such as a copying machine has a front loading type apparatus for pulling out a sheet cassette 2 to the front side of an apparatus main body 1 as shown in FIG. 2 for the purpose of improving operability for a user. Invented.

Further, from the viewpoint of user friendliness,
Ease of handling paper jams is needed.

For this reason, an image forming apparatus of the type in which not only the sheet cassette 2 but also the sheet conveying member is used as one sheet conveying unit and which is pulled out from the apparatus main body 1 has been devised.

FIG. 3 is a vertical cross-sectional view of an image forming apparatus in which the paper transport unit can be pulled out from the apparatus main body 1. The image forming operation will be described, and then the configuration of FIG. 3 will be described. The original 4 placed on the original table glass 3 is illuminated by an illumination lamp 5 that moves in the direction of the arrow in the figure, and the light beam reflected by the original 4 is reflected by a movable mirror 6 that moves together with the illumination lamp 5 to form a movable mirror 6. An image is formed on the photosensitive drum 11 which is further reflected by the moving mirror 7 that moves at a speed half that of the moving mirror 6 in the same direction, passes through the lens 8, and is reflected by the group of fixed mirrors 9 and rotates in the direction of the arrow in the figure. To do. The photosensitive drum 11 is uniformly charged in advance by the primary charger 12, and the light image becomes a latent image. Alternatively, the image information emitted by modulating a video signal with a laser is scanned from a laser device 13 having a polygonal mirror and a lens system via a reflection mirror 14, and the photosensitive drum 11 is scanned.
Form a latent image on top. The latent image on the photosensitive drum 11 is given a toner by the developing device 15 to become a toner image, and the transfer charger 1
Go to 6.

On the other hand, the transfer material S in the paper cassette 2 is sent out by any one of the paper feed rollers 18 and 19, sent out to the carrying path 22 by any one pair of the carrying rollers 21, and sent by the pair of consecutive rollers 23. Next registration roller front guide 2
4, the leading end of the transfer material S hits the registration roller 25 which is stopped after being continuously fed to the image forming apparatus 4, and the registration roller 25 is rotated in synchronization with the latent image on the photosensitive drum 11. The toner passes through the transfer guide 26 between the roller 25 and the transfer charger 16 and advances between the transfer charger 16 and the photosensitive drum 11. The toner having the opposite polarity to that of the toner image on the photosensitive drum 11 is applied by the transfer charger 16 and the toner is transferred. The image is transferred onto the transfer material S. After the transfer, the transfer material S is separated from the photosensitive drum 11 by the separation charger 27, and the fixing roller 29a and the pressure roller 29b are rotated by pressure contact by the transfer / conveyance unit 28.
The toner image is fixed to the transfer material S by the fixing device 29 and is then sent out.

A fixing device outlet roller 31 pair is provided on the outlet side of the fixing device 29, and the transfer material S after fixing is sent by the roller 31 pair and guided to the discharge roller 33 by the flapper 32 at the solid line position in the figure. It is discharged to the tray 34. Flapper 32
Is in the dotted line position in the figure, it is sent to the next flapper 35,
The transfer material S, which is divided into a pair of rollers 37 connected to the multi-copy transport path 36 or a pair of rollers 38 connected to the storage cassette 37 and advances to the multi-copy transport path 36, is formed on the photosensitive drum 11 in the same manner as described above. The transferred toner images are transferred in an overlapping manner and are discharged onto the tray 34.

In the above description, the registration roller front guide 24, the registration roller 25, the transfer guide 26, the transfer charger 16, the separation charger 27, the transfer paper transport unit 28, the fixing unit 29, and the paper discharge unit, which are indicated by the two-dot chain line in the figure , Multi-copy transport path 36
And the like are configured as one sheet transport unit 17, and therefore, by pulling out this unit, it is possible to collectively perform jam (paper jam) processing outside the apparatus main body 1 of the image forming apparatus.

However, the front side plate 1a (FIG. 4) on the front side of the apparatus main body 1 of such an image forming apparatus has a front side because the paper cassette 2 and the paper transport unit 17 come out to the front side of the apparatus main body 1. When the front side plate 1a on the front side of the apparatus main body 1 is made of a plate-shaped member, as shown in FIG.
A large opening 1b is formed at the center of a. As a result, in order to maintain the frame strength of the apparatus body 1, the dimension L1 portion in FIG. 4 needs to be a certain amount or more.

On the other hand, for image forming apparatuses such as copying machines, there is an increasing demand for downsizing from the viewpoint of the installation environment in offices. However, in order to maintain the frame strength of the apparatus main body 1, the L1 portion There is a conflict with the need for size.

Therefore, the front side plate 1a on the front side of the apparatus main body 1 of the image forming apparatus such as a copying machine is extruded from the plate-like one shown in FIG. 4 by the extruding process shown in FIG. As shown in FIG. 6, a square tubular member 41 is formed by combining an upper frame 41a, a lower frame 41b, and a vertical frame 41c into a rectangular shape by welding or the like to form an closed open frame 42, and the open frame 42 is connected to the front side plate 1a.
Alternatively, a device using the strength support member of the front side plate 1a of the device body 1 has been devised.

[0012]

However, as shown in FIG. 6, the rectangular tubular material extruded as shown in FIG. 5 is combined by welding or the like and used as a strength supporting member for the front side plate of the apparatus main body. Since the device uses a member having a large cross-section coefficient, which is an extruded square tubular member, it is possible to maintain the strength of the device main body in a small space. When a member (for example, a rail member for pulling out the paper transport unit) is attached, it is necessary to form a hole in the extruded square tubular material with a drilling machine or the like, which greatly deteriorates mass productivity. Similarly, when some notch is required, milling or the like is required, which reduces the degree of freedom in design and significantly increases the cost. And the chips from these cutting processes remain in the hollow frame,
This chip may be difficult to remove and cannot be removed.
Further, since it is a hollow material, it is difficult to perform punching by press. Furthermore, the screw member and the reinforcing member cannot be fixed in the hollow rectangular tube.

The present invention provides a method of manufacturing a frame body by a frame member which is capable of providing a large opening in the main body of the image forming apparatus and has improved workability, a frame body, and an image forming apparatus provided with this frame body. The purpose is to

[0014]

According to a first aspect of the present invention, a portion of a metal strip plate, which is required as a frame body at the time of completion, is subjected to necessary processing for obtaining a shape required for the completed frame body. After that, the strip is bent along its longitudinal direction to form a strip member having an angle-type steel section or a groove-type steel section, and two strips of the angle-type steel shape or two strip-shaped steel sections are longitudinally formed. A method of manufacturing a frame body, characterized in that the respective flange end portions are overlapped and welded to each other to form a frame member of one hollow strip, and the frame members are combined to form a frame body. Is.

The second invention of the present invention is the machining according to the first invention, which is perforating, milling, pressing, welding,
A method of manufacturing a frame body is characterized in that an assembly process or the like is selectively performed.

A third invention of the present invention is, instead of or in addition to the processing at the time of the strip plate, after forming the strip material into the angle type steel shape or the groove type steel shape, perforating, milling, The frame body manufacturing method according to the first aspect of the invention is characterized in that necessary processing for obtaining a required shape is added to a completed frame body such as press working, welding, and assembly work.

A fourth aspect of the present invention provides a metal strip plate with a shape required for a completed frame body such as perforating, milling, pressing, welding, and assembling in a portion required at the time of completion as a frame body. After performing the necessary processing for obtaining, the strip is bent along its longitudinal direction to form a strip having an angle-section steel type or groove-type steel shape, and two strips of angle-type steel shape or two grooves. Characterized in that a shape steel-shaped strip is welded by overlapping the respective flange end sides in the longitudinal direction to form one hollow strip, and the frame material is formed by combining the frame materials including this hollow strip. It is a frame body.

A fifth invention of the present invention is to replace the above-mentioned processing at the time of strip plate or in addition to the above-mentioned processing at the time of strip plate, after forming a strip material into an angle type steel shape or a groove type steel shape, perforating, milling, The frame body according to the fourth aspect of the invention is characterized in that necessary processing for obtaining a required shape is added to a completed frame body such as press working, welding, and assembly work.

According to a sixth aspect of the present invention, in the image forming apparatus in which the image forming means of the apparatus main body is supported by the frame body, the frame body has the frame body according to the fourth or fifth aspect. A characteristic image forming apparatus.

[0020]

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

Example 1 FIG. 1 shows a frame body obtained by the method for manufacturing a frame body of the present invention, and is used as a front side plate of the image forming apparatus shown in FIGS. 2 and 3.

On the front side shown in FIGS. 2 and 3, an upper frame 103, a lower frame 104, and a vertical frame 102 are combined in a rectangular shape, and a rigid frame front side plate 101 is incorporated. Rails 51 that symmetrically guide the paper transport unit 17 are attached to the vertical frame 102. The two rails 51 are arranged so that their groove sides are opposed to each other and are horizontal and parallel in the front-rear direction inside the image forming apparatus. The rail 51 is a lip groove type steel shape with a lip only on the upper side in the drawing, and the web side is fitted in the notch 52 of the vertical frame 102, and the flange 53 welded to the rail 51 is inserted to insert a screw member 54 such as a bolt. Is screwed into the vertical frame 102.

As shown in FIG. 7, the cross sections of the upper frame 103, the lower frame 104, and the vertical frame 102 are a combination of the same strips 100a and 100b of different-angled steel, and these strips 100a and 100b are combined. The respective flange ends are welded together so that the cross section becomes a hollow rectangular tube.

10 to 17 illustrate a method of manufacturing the vertical frame 102 in the order of steps. Since the left and right vertical frames 102 are symmetrical, only the left vertical frame 102 in FIG. 1 will be described. A strip steel is used for the blanks 100a-1 and 100b-1 having a shape in which the angle type steel strips 100a and 100b are developed (see FIGS. 10 and 11).

A blank 10 as shown in FIGS.
0a-1 is a notch 52a which becomes a part of the notch 52 at the time of assembly and a hole 54a through which the screw member 54 is inserted, and a blank 100b-1 is punched with a notch 52b which becomes a part of the notch 52 at the time of assembly ( When the plate is thick, mill it (the shaded area).

As shown in FIG. 14, a rectangular thick plate internal thread member 55 having an internal thread 54b corresponding to the hole 54a of the punched intermediate member 100a-2 of FIG. Then, the intermediate members 100a-3 are fixed by fixing them with rivets.

As shown in FIG. 15, the intermediate member 100a-3.
With the female screw member 55 being on the inside, it is bent in the longitudinal direction into an L-shaped cross section by a press to form an intermediate member strip 100a.

As shown in FIG. 16, the intermediate member 100b-2
Is bent in the longitudinal direction into a L-shaped cross section by a press to form an intermediate member strip 100b.

As shown in FIG. 17, strips 100a, 100
The respective flange ends of b are joined together and welded W to form the vertical frame 102 of the hollow square tube. As a result, FIG.
14, the notches 52a and 52b provided on the blanks 100a-1 and 100b-1 are combined to form the notch 52, and the female screw 54b of FIG.
There are five.

For simplicity, the above description is limited to the processing of the shape for attaching the guide rail 51 to the vertical frame 102, but the processing required for the image forming apparatus is mainly the blanks 100a-1 and 100b-1 of the strip plate. It is added in the state of. However, instead of welding such as perforation and notch in a blank state, similar processing may be performed after processing the L-shaped cross section, or the processing may be performed separately for both. As described above, machining or welding is performed at the time of a strip blank or a strip having an L-shaped cross section, so that the processing is easy. Then, as shown in FIG. 17, the female screw member 55 can be provided so as to be inside the hollow square tube in the state of the hollow square tube, and the blank 10 can be directly connected.
When the length of the female screw is insufficient when the female screw is provided at 0a-1, the plate thickness of the female screw member 55 can be increased to make the length of the female screw the required length. It should be noted that instead of the female screw member 55, a nut may be aligned with the hole 54a and welded.

Similarly, the upper frame 103 and the lower frame 104 are manufactured,
The front side plate 101 of the apparatus main body 1 is completed by assembling the upper frame 103, the lower frame 104, and the vertical frame 102 into a square shape by welding in four directions. The front side plate 101 is a part of the frame body of the apparatus main body 1, and the front side plate 101, the rear side plate, the side plate, the seat plate, and the top plate of the apparatus main body 1 form a hollow six-cube frame.

In the figure, the upper frame 103 and the lower frame 104 of the front plate 101 are also formed by the same hollow square tube as the vertical frame 102, but this part is not a hollow square tube, and other shapes are sufficiently strong. Even when the cross-sectional shapes of the upper frame 103 and the lower frame 104 are shapes other than the rectangular tube, the same effect can be obtained as the front side plate 101.

[Second Embodiment] FIG. 8 shows a second embodiment of the present invention. Unlike FIG. 1, in FIG. 9, a strip is bent into strip-shaped steel strips 101a and 101b, the grooves are opposed to each other, and the respective flanges are overlapped and fixed by welding to form a frame member. After performing necessary processing required when assembled as a frame body at the time of a strip plate, the strip-shaped steel strips 101a, 101
b, and then the vertical frame 102. Upper frame 103, lower frame 1
The same applies to 04, the upper frame 103 and the lower frame 10
4, the vertical frame 102 is assembled in four directions and fixed by welding, and the front side plate 10
Get one.

Since the second embodiment is manufactured from the blank of the plate-like member as in the first embodiment, it has the same advantages and can fix the overlapping portions of the plate materials by spot welding. It is possible. That is, as compared with the case of the first embodiment, the first embodiment is fixed by fillet welding or the like, but the mass productivity can be further improved by using spot welding, which has a good mass productivity. Note that the upper frame and the lower frame do not necessarily have to be rectangular tubes, as is the case with the first embodiment.

[0035]

According to the first aspect of the present invention, in order to form a hollow frame body, for example, the notch, the perforation, and the other member are fixed to each of the two strips by the processing shown in the second aspect of the present invention. After performing assembly processing, etc., it is bent into an angle type steel shape or groove type steel shape to form a strip material, and two strip materials are joined by welding to form a hollow frame material. Compared to adding processing, processing is done in a flat plate state with both sides open, so processing is easy, and it is also easy to assemble and fix other members in advance inside the hollow frame member after completion. It can be carried out.

A third aspect of the present invention is the same as the first aspect of the present invention, in which, after forming a strip material in an angle type steel shape or a groove type steel shape, processing is not performed in a band plate state or in addition to processing in a band plate state. Since various kinds of processing are performed by using various methods, for example, when mounting other members inside the hollow strip, the bending die for bending the strip and the angle type steel shape or groove type steel shape becomes simple. . Further, when the notch is large and the blank needs to have rigidity, the notch can be processed subsequent to the bending process.

Since the fourth invention of the present invention is a frame body having a hollow frame member obtained by the manufacturing method of the first invention, a frame body having complicated notches, a large number of holes and the like can be easily formed. Can be obtained.

Since the fifth invention of the present invention is a frame body having the hollow frame member obtained by the manufacturing method of the first invention in the fourth invention, it is provided with complicated notches, a large number of holes and the like. The frame can be easily obtained. Further, there is an effect that it is possible to obtain a frame body including a hollow frame member in which a female screw member, a nut, a seat plate, and other members as necessary are fixed to the frame member inside the hollow strip member.

In the sixth invention of the present invention, the image forming means is the fourth.
Alternatively, since it is supported by the frame body shown in the fifth invention,
In addition to the strong frame, there are few restrictions on the process of mounting other members inside and outside the frame, which increases the degree of freedom in design, improves the workability of mass production, and enables significant cost reduction. .

[Brief description of drawings]

FIG. 1 is a perspective view of a front side plate of an apparatus main body according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of an image forming apparatus to which the present invention is applied.

FIG. 3 is a vertical sectional view of an image forming apparatus to which the present invention is applied.

FIG. 4 is a perspective view of a front side plate of an apparatus body of an image forming apparatus of a conventional example.

FIG. 5 is a perspective view of a frame member used for the front side plate of the apparatus body of the conventional image forming apparatus.

FIG. 6 is a perspective view of a front side plate of a device body of a conventional image forming apparatus.

FIG. 7 is a perspective view of a frame member used for the front side plate of the apparatus main body according to the first embodiment of the present invention.

FIG. 8 is a perspective view of a front side plate of the apparatus main body according to the second embodiment of the present invention.

FIG. 9 is a perspective view of a frame member used for the front side plate of the apparatus main body according to the second embodiment of the present invention.

FIG. 10 is a plan view of the vertical frame blank according to the first embodiment of the present invention.

FIG. 11 is a plan view of the vertical frame blank according to the first embodiment of the present invention.

12 is a plan view showing a first step of the blank of FIG.

13 is a plan view showing a first step of the blank of FIG.

14 is a plan view showing a second step of the blank of FIG.

FIG. 15 is a perspective view showing bending in the next step of FIG.

16 is a perspective view showing a bending process in a second step following the process shown in FIG.

FIG. 17 is a perspective view showing a final step of assembling and welding the vertical frame.

[Explanation of symbols]

 1 Device Main Body 100a, 101a Strips 100b, 101b Strips 101 Front Side Plate 102 Hard Frame 103 Upper Frame 104 Lower Frame

Claims (6)

[Claims] 1. A metal strip plate is subjected to necessary processing for obtaining a shape required for the completed frame body at a portion required at the time of completion as a frame body, and then the strip plate is arranged along the longitudinal direction thereof. By bending it into a strip of angle steel or groove steel, and welding two strips of angle steel or two strips of groove steel in the longitudinal direction with their respective flange end sides overlapping. A method of manufacturing a frame body, comprising forming a frame member of one hollow strip and combining the frame materials including the frame member to form a frame body. 2. The processing includes punching, milling,
The method for manufacturing a frame body according to claim 1, wherein press working, welding, assembling, etc. are selectively performed. 3. A piercing process, a milling process, a pressing process, a welding process, an assembling process for a bar material after forming a bar material into an angle type steel shape or a groove type steel shape instead of or in addition to the processing for the band plate. The method for manufacturing a frame body according to claim 1, wherein necessary processing for obtaining a required shape is performed on the completed frame body such as processing. 4. A required process for obtaining a shape required for a completed frame body such as punching, milling, pressing, welding, and assembling in a portion required at the time of completion as a frame body on a metal strip plate. After that, the strip is bent along its longitudinal direction to form a strip member having an angle-section steel type or a groove-type steel type, and two strip-shaped strip members or two strip-shaped strip members are formed. A frame body, characterized in that each flange end side is overlapped in the longitudinal direction and welded to form a single frame member made of a hollow strip, and frame materials are formed by combining frame materials including this frame member. 5. A piercing process, a milling process, a pressing process, a welding process, an assembling process for the strip material after forming a strip material into an angle type steel shape or a groove type steel shape instead of or in addition to the processing at the time of the strip plate. The frame body according to claim 4, wherein necessary processing for obtaining a required shape is added to the completed frame body such as processing. 6. An image forming apparatus in which the image forming means of the apparatus main body is supported by a frame body, wherein the frame body has the frame body according to claim 4 or 5.