JP2021146565A - Cover member and image formation device - Google Patents

Abstract

To expose at least an upper side of a roll body while protecting the roll body.SOLUTION: A cover member 30 covers a roll body 8 that is a recording medium held by an image formation device 100 and round into a roll shape. The cover member 30 is disposed between a maximum-diameter lower end 8a of the roll body 8 disposed lowermost and a placing surface 200 on which the image formation device 100 is placed, and exposes at least an upper side of the roll body 8 disposed lowermost.SELECTED DRAWING: Figure 8

Description

The present invention relates to a cover member and an image forming apparatus.

As an image forming apparatus such as a copying machine or a printer, an image forming apparatus is known in which a recording medium wound in a roll shape is unwound and an image is formed on the unwound recording medium.

For example, in Patent Document 1 (Japanese Unexamined Patent Publication No. 9-240888), a cover member for covering a roll-shaped recording medium is provided in an image forming apparatus to which a roll-shaped recording medium (roll paper) is mounted. The configuration is disclosed.

However, since the cover member described in Patent Document 1 is configured to cover the roll-shaped recording medium from below to above as a whole, the roll-shaped recording medium is attached to and detached from the apparatus main body. In order to visually check the surface of the recording medium, the operator must open the cover member, which causes a problem that the workability is not good. On the other hand, if the roll body is not covered with the cover member in order to improve workability, when the operator operates the image forming apparatus, the operator's toes or the like come into contact with the roll body, and the roll body is covered with the roll body. There is a risk of dirt and damage.

In order to solve the above problems, the present invention is a cover member for covering a roll body which is a recording medium held in an image forming apparatus and wound in a roll shape, and has a maximum diameter of the roll body arranged at the lowermost position. The cover member is arranged between the lower end and the mounting surface on which the image forming apparatus is mounted, and exposes at least the upper side of the roll body arranged at the lowermost position.

According to the present invention, the cover member can protect at least the lower part of the roll body and expose at least the upper part of the roll body to improve workability.

It is a schematic block diagram of the inkjet image forming apparatus which concerns on one Embodiment of this invention. It is a perspective view of the supply roll body holding part. It is a perspective view of a cover member. It is sectional drawing which shows the structure of the expansion / contraction mechanism of a cover member. It is a perspective view of the image forming apparatus which attached the cover member. It is a figure for demonstrating the attachment method of a cover member. It is a figure for demonstrating the attachment method of a cover member. It is the figure which looked at the state which the cover member was attached to the image forming apparatus from the axial direction of a roll body. It is a figure which shows the state which the operator stands on the front side of the image forming apparatus with the cover member attached. It is a figure which shows the state which the cover member is continuously arranged over the entire axial direction of a roll body. It is a perspective view of the cover member which concerns on 2nd Embodiment of this invention. It is a figure which shows the state which the cover member which concerns on 2nd Embodiment is attached to an image forming apparatus as seen from the axial direction of a roll body. It is a figure which shows the structure of the cover member which concerns on 3rd Embodiment of this invention. It is a figure which shows the structure of the cover member which concerns on 4th Embodiment of this invention. It is a figure which shows the structure of the cover member which concerns on 5th Embodiment of this invention. It is a figure which shows the state that the foot tip of an operator comes into contact with a roll body.

Hereinafter, the present invention will be described with reference to the accompanying drawings. In each drawing for explaining the present invention, components such as members and components having the same function or shape are once described by giving the same reference numerals as much as possible, and then the description thereof will be described. Omit.

FIG. 1 is a schematic configuration diagram of an inkjet image forming apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the image forming apparatus 100 according to the present embodiment includes an image forming unit 1 that forms an image on a sheet-shaped recording medium, and a recording medium supply unit 2 that supplies a recording medium to the image forming unit 1. , The recording medium collection unit 3 that collects the recording medium on which the image is formed, the pretreatment liquid application unit 4 that applies the pretreatment liquid to the recording medium before the image is formed, and the recording medium on which the image is formed. It includes a post-treatment liquid applying unit 5 for applying the post-treatment liquid, an operation unit 6 for operating the image forming apparatus 100, and a plurality of transport rollers 7A to 7D as transport means for transporting the recording medium. ..

The image forming unit 1 includes a liquid discharging head 10 as a liquid discharging means for discharging a liquid (ink) for forming an image on paper, a carriage on which the liquid discharging head 10 is mounted, and a recording medium below the liquid discharging head 10. A plate-shaped or block-shaped guide member 12 for guiding the guide member 12 is provided. The liquid discharge head 10 has a plurality of discharge ports for discharging liquids of each color of yellow, cyan, magenta, and black. The color of the liquid used is not limited to these. Further, the image forming unit 1 may discharge only one color liquid. The carriage 11 is configured to be movable along a guide rail 13 provided in the main body of the image forming apparatus in the main scanning direction (direction orthogonal to the paper surface in FIG. 1), which is the width direction of the recording medium.

A supply roll body 8 in which unused paper is wound in a roll shape is mounted on the recording medium supply unit 2. Therefore, the recording medium supply unit 2 is provided with a supply roll body holding unit 14 for holding the supply roll body 8.

On the other hand, the recording medium collection unit 3 is provided with a collection roll body holding unit 15 for holding the collection roll body 9 formed by winding the paper into a roll shape. A roll shaft 19 for winding the paper is rotatably held in the collection roll body holding portion 15.

FIG. 2 shows a detailed configuration of the supply roll body holding unit 14.

As shown in FIG. 2, the supply roll body holding portion 14 is provided with a bearing 16 for rotatably holding the supply roll body 8. The bearing 16 according to the present embodiment is divided into an upper bearing portion 16A and a lower bearing portion 16B. In order to mount the supply roll body 8 on the bearing 16, first, as shown by the alternate long and short dash line in FIG. 2, the upper bearing portion 16A is opened or removed from the lower bearing portion 16B. A roll shaft 18 (a portion of the supply roll body 8 protruding from both ends in the width direction) for supporting the supply roll body 8 is placed on the lower bearing portion 16B. Then, the roll shaft 18 is rotatably held by covering the lower bearing portion 16B with the upper bearing portion 16A and sandwiching the roll shaft 18 between the upper and lower bearing portions 16A and 16B. The bearings 16 are arranged on one end side and the other end side of the supply roll body 8, respectively.

Further, as shown in FIG. 2, the recording medium supply unit 2 is provided with a main body side gear 20 for transmitting a rotational driving force to the supply roll body 8. As described above, when the roll shaft 18 is placed on the lower bearing portion 16B, the gear portion 21 provided on one end side of the roll shaft 18 meshes with the main body side gear 20 to engage the main body side gear. The driving force can be transmitted from the driving source of the image forming apparatus main body to the roll shaft 18 via the 20. In this state, the driving force is transmitted from the driving source to the roll shaft 18, so that the roll shaft 18 and the supply roll body 8 are integrally driven to rotate.

Similarly, the collection roll body holding unit 15 of the recording medium collection unit 3 is also provided with a pair of bearings that rotatably hold the roll shaft 19 for paper winding. Further, the recording medium collection unit 3 is provided with a main body side gear for rotating the roll shaft 19 as in the recording medium supply unit 2. The configurations of these bearings and the main body side gear are the same as those of the bearing 16 and the main body side gear 20 shown in FIG.

Next, the printing operation of the image forming apparatus 100 according to the present embodiment will be described with reference to FIG.

When the printing operation is started based on the input signal of the operation unit 6, the shaft 18 supporting the supply roll body 8, the winding shaft 19, and the plurality of transport rollers 7A to 7D are moved in the direction of the arrow in FIG. The paper P is supplied from the supply roll body 8 toward the image forming unit 1. The paper P passes through the pretreatment liquid application unit 4 on the way to the image forming unit 1, and the pretreatment liquid is applied to the paper P from the pretreatment liquid application unit 4. The pretreatment liquid is, for example, a liquid for the purpose of suppressing image bleeding and improving image quality such as density and color tone. The surface condition of the paper P to which the pretreatment liquid is applied is modified and supplied to the image forming unit 1.

When the paper P is supplied to the image forming unit 1, the liquid is discharged from the liquid ejection head 10 based on the image information, and an image is formed on the paper P. Specifically, the liquid (ink) is ejected from the liquid ejection head 10 while the carriage 11 moves in the main scanning direction with respect to the stopped paper P, so that an image for one line is formed. Then, after the paper P is conveyed by a predetermined amount along the guide member 12, the image of the next line is formed. Subsequently, the transfer and stop of the paper P and the reciprocating movement of the carriage 11 are repeatedly performed, and images are sequentially formed on the paper P. As described above, in the present embodiment, a so-called serial type liquid discharge head in which the liquid discharge head 10 discharges the liquid while moving in the main scanning direction is adopted. However, the liquid discharge head is not limited to the serial type, and may be a so-called line type liquid discharge head that discharges the liquid without moving a plurality of liquid discharge heads arranged in the main scanning direction.

After that, the paper P is conveyed to the post-treatment liquid application unit 5, and the post-treatment liquid is applied to the image-forming surface of the paper P. As a result, a transparent protective layer is formed on the image forming surface. Then, the paper is collected as the collection roll body 9 by being wound in a roll shape by the rotating winding shaft 19. This completes a series of printing operations.

By the way, in the configuration in which the operation unit 6 and the supply roll body 8 are arranged on the front side (left side in FIG. 1) of the apparatus main body as in the image forming apparatus of the present embodiment, when the operator operates the operation unit 6. There are many opportunities to stand in front of the supply roll body 8. However, when the supply roll body 8 is exposed on the front side of the apparatus main body, as shown in FIG. 16, the operator's toes (shoes, etc.) come into contact with the supply roll body 8, and the supply roll body 8 becomes dirty. It may be damaged or damaged. In particular, when the outer peripheral surface of the supply roll body 8 serves as an image forming surface of the paper as in the present embodiment, the stain or damage of the supply roll body 8 directly affects the image quality, which is more serious. It becomes a problem. Therefore, measures for suppressing dirt and damage of the supply roll body 8 are required.

Therefore, in the image forming apparatus according to the present embodiment, in order to suppress the contact of the toes with the supply roll body 8, a cover member covering the supply roll body 8 is provided. Hereinafter, the configuration of the cover member will be described.

FIG. 3 is a perspective view of the cover member according to the present embodiment.

As shown in FIG. 3, the cover member 30 according to the present embodiment is configured to be stretchable by two plate-shaped members 31 and 32 slidably assembled in the longitudinal direction B. Specifically, each of the plate-shaped members 31 and 32 includes a flat plate-shaped cover main body 33, an inclined portion 34 extending diagonally upward in FIG. 3 from one side extending in the longitudinal direction B of the cover main body 33, and the cover member 30. It has a pair of upright portions 35 extending upward in the drawing so as to be orthogonal to or intersecting each cover main body 33 from the ends of the cover main bodies 33 corresponding to both ends in the longitudinal direction B.

The expansion / contraction mechanism for expanding and contracting the cover member 30 includes two slits 36 formed in the cover main body 33 of one plate-shaped member 31 and a cover main body of the other plate-shaped member 32 so as to be inserted through each slit 36. It is composed of two screws 37 provided on 33 and two nuts 38 (see FIG. 4) fastened to each screw 37. In order to expand and contract the cover member 30 in the longitudinal direction B, first, the nuts 38 are loosened to release the fastening between the plate-shaped members 31 and 32, and the plate-shaped members 31 and 32 are brought into the longitudinal direction. Make it slidable to B. Then, by sliding the plate-shaped members 31 and 32 in the longitudinal direction B, the cover member 30 is expanded and contracted, and each nut 38 is moved in a state where the relative positions of the plate-shaped members 31 and 32 are at desired positions. By fastening, the plate-shaped members 31 and 32 are positioned by being sandwiched between the screws 37 and the nuts 38. Thereby, the desired length of the cover member 30 can be adjusted.

Further, as shown in FIG. 3, the pair of standing portions 35 are provided with fixing portions 40 for attaching and fixing the cover member 30 to the image forming apparatus. Each fixing portion 40 is composed of a screw 41 and a pressure welding portion 42 capable of advancing and retreating in the longitudinal direction B by the screw 41.

FIG. 5 shows a state in which the cover member 30 is attached to the image forming apparatus 100.

As shown in FIG. 5, the cover member 30 is attached below the supply roll body 8 mounted on the image forming apparatus 100.

Hereinafter, a method of attaching the cover member 30 will be described.

As shown in FIG. 5, in the image forming apparatus 100 according to the present embodiment, the cover member 30 is attached between a pair of main body frames 101 provided on the left and right sides of the image forming apparatus 100. In order to attach the cover member 30 to the image forming apparatus 100, first, the cover member 30 is made expandable in the longitudinal direction B as described above, and as shown in FIG. 6, the length L of the cover member 30 is set. The length is adjusted to be slightly shorter than the distance W between the pair of main body frames 101 provided in the lower part of the image forming apparatus 100 (distance between the facing side surfaces) W. Then, while holding the cover member 30 in a state of being arranged between the pair of main body frames 101, as shown in FIG. 7, the screw 41 of each fixing portion 40 is turned, and the main body frame 101 facing both the left and right pressure contact portions 42. Press contact with (side surface). In this way, each pressure contact portion 42 is pressed against each main body frame 101, so that the cover member 30 is fixed between the main body frames 101 so as not to fall off.

As described above, since the cover member 30 according to the present embodiment can be expanded and contracted in the left-right direction (longitudinal direction or axial direction of the supply roll body 8) of the image forming apparatus 100, the distance between the pair of main body frames 101 It is possible to adjust the length L of the cover member 30 according to W. Therefore, even in an image forming apparatus in which the distance W between the main body frames 101 to which the cover member 30 is attached is different, the length L of the cover member 30 can be adjusted and attached. Further, the cover member 30 may be configured so as not to expand and contract.

FIG. 8 is a view of the state in which the cover member 30 is attached to the image forming apparatus 100 as viewed from the axial direction of the supply roll body 8.

As shown in FIG. 8, the cover member 30 is arranged below the supply roll body 8 in a state of being attached to the image forming apparatus 100. More specifically, the cover member 30 is below the lower end 8a of the maximum diameter of the supply roll body 8, and at least the lower end 8a and the floor surface (mounting surface on which the image forming apparatus 100 is mounted) 200 Arranged in space A.

Here, the mounting position of the cover member 30 is set below the lower end 8a of the maximum diameter of the supply roll body 8 when the supply roll body 8 has the maximum outer diameter, that is, the supply roll body 8 is unused. Even so, the cover member 30 is arranged below the supply roll body 8. Further, the “lower end 8a of the maximum diameter of the supply roll body 8” refers to the portion of the outer peripheral surface of the supply roll body 8 having the maximum diameter that is closest to the floor surface (mounting surface) 200. Generally, the maximum diameter of the roll body used in the image forming apparatus differs depending on the type of the roll body, but the maximum outer diameter of the roll body generally used is mainly 14 cm to 15.4 cm. Alternatively, it is 9 cm to 11 cm. Therefore, the cover member 30 may be arranged below the lower end of the roll body having such a maximum outer diameter, for example.

As described above, in the present embodiment, the cover member 30 is arranged between the lower end 8a of the maximum diameter of the supply roll body 8 and the floor surface 200, so that at least the lower portion of the supply roll body 8 is formed. It can be protected by the cover member 30. Therefore, as shown in FIG. 9, even if the operator stands on the front side of the image forming apparatus and operates the image forming apparatus, it is possible to prevent the operator's toes from coming into contact with the supply roll body 8, and the supply roll can be prevented from coming into contact with the supply roll body 8. It becomes possible to suppress dirt and damage of the body 8.

Further, assuming that the side where the operator is located (or the side where the operation unit 6 is arranged) is the front and the opposite side is the rear with respect to the image forming apparatus 100, as shown in FIG. In the embodiment, the cover member 30 is attached to the image forming apparatus 100 and is arranged obliquely upward from the cover main body 33 arranged between the lower end 8a of the maximum diameter of the supply roll body 8 and the floor surface 200. It has an inclined portion 34 extending diagonally upward to the left in FIG. Thereby, it is possible to more effectively prevent the contact of the toes with the supply roll body 8. That is, since such an inclined portion 34 is located in front of the cover main body portion 33, when the operator raises the toes upward, the toes get over the cover member 30 and the supply roll body 8 It becomes easier to prevent contact with.

Further, as shown in FIG. 10, in a state where the cover member 30 is attached to the image forming apparatus 100, particularly the portion X of the cover main body 33 is continuously arranged over the entire axial direction Y of the supply roll body 8. It is preferable to be done. By doing so, it is possible to protect the surface of the supply roll body 8 without gaps over the entire axial direction. A slit or a hole may be provided in a part of the cover member 30 as long as the gap is such that the tip of the operator cannot enter.

As described above, in the image forming apparatus according to the present embodiment, by providing the cover member that protects the roll body, dirt and damage to the roll body can be suppressed, so that the quality of the printed matter and its reliability are improved. It is possible. However, on the other hand, if the cover member is attached around the roll body, there is a problem that it becomes difficult to attach / detach the roll body and it becomes difficult to visually recognize the roll body from the outside. In particular, when the cover member covers the roll body as a whole as in the configuration described in Patent Document 1 described above, it becomes difficult to attach / detach the roll body and visually confirm the roll body.

In response to such a problem, in the present embodiment, as shown in FIG. 8, in a state where the cover member 30 is attached to the image forming apparatus 100, at least the upper region of the supply roll body 8 is covered by the cover member 30. I try to expose it without doing it. By exposing at least the upper region of the supply roll body 8 in this way, the supply roll body 8 can be provided without interfering with the cover member 30 even when the cover member 30 is attached to the image forming apparatus 100. The image forming apparatus 100 can be attached to and detached from the image forming apparatus 100, and the supply roll body 8 can be visually observed from above. Therefore, according to the configuration according to the present embodiment, the workability of the attachment / detachment work of the supply roll body 8 and the visual confirmation work is improved.

Further, in order to more reliably improve workability, the range in which the supply roll body 8 is exposed is particularly above the center O (rotation center, where the roll shaft 18 is located) of the supply roll body 8 shown in FIG. Is preferable. Further, the range in which the supply roll body 8 is exposed does not have to be the range extending over the entire front-rear direction above the center O of the supply roll body 8. That is, even if the supply roll body 8 is above the center O but behind the center O (on the right side in FIG. 8), even if the supply roll body 8 is covered with the cover member 30, the image forming apparatus It does not interfere with the attachment / detachment work and the visual work of the supply roll body 8 from the front (front) of the 100. Therefore, a part of the supply roll body 8 above the center O may be covered with the cover member 30 as long as it is behind the center O of the supply roll body 8.

Further, as shown in FIG. 8, in the present embodiment, the front end 30b of the cover member 30 is behind the front end 8b of the maximum diameter of the supply roll body 8 in a state where the cover member 30 is attached to the image forming apparatus 100. It is designed to be located in. By doing so, since the cover member 30 does not protrude forward from the supply roll body 8, it becomes easier to perform the work of attaching / detaching the supply roll body 8 and the visual confirmation work. In addition, the operator can operate the image forming apparatus by standing close to the image forming apparatus, which facilitates the operation of the image forming apparatus. The "front end 30b of the maximum diameter of the cover member 30" means a portion of the outer peripheral surface of the supply roll body 8 having the maximum diameter, which is located most in front of the image forming apparatus 100. Further, the "maximum diameter" referred to here is synonymous with the above "maximum diameter".

Here, the cover member according to the present invention can be applied not only to an image forming apparatus to which only one supply roll body 8 is attached as shown in FIG. 1, but also to an image forming apparatus to which a plurality of roll bodies can be attached and detached. Is. That is, the cover member according to the present invention is arranged between the lower end of the maximum diameter of the roll body arranged at least at the bottom and the floor surface regardless of whether the roll body is one or more. It should be done. Therefore, in the present invention, the "lowermost roll body" is defined as a plurality of roll bodies (including the recovery roll body 9 in addition to the supply roll body 8) attached to the image forming apparatus. It means the roll body attached to the lowermost position among these, and when one roll body is attached to the image forming apparatus, it means the one roll body.

As described above, the cover member according to the present invention is arranged between the lower end of the maximum diameter of the roll body arranged at least at the lowest position and the floor surface, so that the roll is easily soiled by the contact of the operator's toes. The body can be protected by the cover member. Further, the cover member according to the present invention protects the roll body arranged at the lowermost position while being attached to the image forming apparatus, and exposes at least the upper side of the roll body arranged at the lowermost position. Even with the cover member attached, the roll body arranged at the lowermost position can be attached / detached and visually confirmed, so that workability can be improved. Therefore, according to the present invention, it is possible to realize both protection of the roll body arranged at the lowermost position and improvement of workability.

Further, in the above embodiment, the recovery roll body 9 arranged above the supply roll body 8 is not covered by the cover member 30 and is exposed (see 5), so that the recovery roll body 9 is recovered in the same manner as the supply roll body 8. The roll body 9 can also be attached and detached with the cover member 30 attached, and can be visually confirmed. Further, if necessary, it is possible to write information such as the quality of the image when the operator visually confirms it in the margin of the paper wound as the collection roll body 9.

Further, in the above-described embodiment, the supply roll body 8 is arranged below the recovery roll body 9, but on the contrary, the recovery roll body 9 is arranged below the supply roll body 8. May be good. In that case, the cover member 30 is arranged between the lower end of the maximum diameter of the recovery roll body 9 which is the lowermost roll body and the floor surface, and further, at least the upper side of the recovery roll body 9 is exposed. This makes it easier to attach / detach the recovery roll body 9 and visually confirm the recovery roll body 9 while protecting the recovery roll body 9.

Hereinafter, embodiments of the cover member different from the above-described embodiment (first embodiment) will be described. In the following description, the parts different from the above-described embodiment will be mainly described, and the other parts have basically the same configuration, and thus the description will be omitted as appropriate.

FIG. 11 is a perspective view of the cover member according to the second embodiment of the present invention.

The cover member 30 shown in FIG. 11 has two inclined portions 34 and 39. Other than that, it has the same configuration as the cover member 30 shown in FIG. Specifically, one of the two inclined portions 34, 39 so as to extend diagonally upward in FIG. 11 from one side (the side on the left front side in FIG. 11) extending in the longitudinal direction B of the cover main body portion 33. The other inclined portion 39 is provided so as to extend diagonally upward in FIG. 11 from the other side (the side on the right back side in FIG. 11) extending in the longitudinal direction B of the cover main body portion 33.

FIG. 12 shows a state in which the cover member 30 according to the second embodiment is attached to the image forming apparatus.

As shown in FIG. 12, in a state where the cover member 30 according to the second embodiment is attached, one of the inclined portions 34 extends diagonally forward and upward (diagonally upward to the left in FIG. 12) from the cover main body 33. The other inclined portion 39 is arranged so as to extend diagonally upward from the cover main body 33 (in the diagonally upward right direction in FIG. 12). However, the inclined portion (front inclined portion) arranged in the front and the inclined portion (rear inclined portion) arranged in the rear may be any of a pair of inclined portions 34 and 39. That is, in the second embodiment, since the cover member 30 has a pair of inclined portions 34, 39, both ends of the cover member 30 in the longitudinal direction are attached to the image forming apparatus 100 in the opposite direction. Also, one of the inclined portions is arranged in the front and the other inclined portion is arranged in the rear. Therefore, the mounting state of the cover member 30 is the same.

As described above, in the second embodiment, since the cover member 30 has the pair of inclined portions 34, 39, the mounting state is the same even if the mounting direction of the cover member 30 is reversed left and right. be able to. As a result, the mounting work can be performed without worrying about the mounting direction of the cover member 30, and the occurrence of mounting mistakes can be reduced.

Subsequently, FIG. 13 shows the configuration of the cover member 30 according to the third embodiment of the present invention.

The cover member 30 shown in FIG. 13 has a different structure of the fixing portion 40 for attaching the cover member 30 to the image forming apparatus 100. Other than that, it is the same as the above-described first embodiment. Specifically, the fixing portion 40 shown in FIG. 13 is configured to be hooked and fixed to the main body frame 101 of the image forming apparatus 100 from above.

In this case, since the cover member 30 can be attached by hooking the fixing portion 40 from above the main body frame 101, it is not necessary to perform the attachment work of the cover member 30 between the pair of main body frames 101, and the cover member 30 is above the main body frame 101. It can be done using the large space of. Therefore, the mounting workability is excellent. If it is difficult to maintain the posture of the cover member 30 simply by hooking the fixing portion 40 on the main body frame 101 from above, the fixing portion 40 may be fixed to the main body frame 101 by using a fastening member such as a screw. ..

In the cover member 30 according to the fourth embodiment of the present invention shown in FIG. 14, the inclined portion 34 is formed in a curved surface shape such as an arc shape following the shape of the outer peripheral surface of the supply roll body 8. In the above-described embodiment, the inclined portion 34 of the cover member 30 is formed in a plane shape, but the inclined portion 34 may be formed in a curved surface shape as in the cover member 30 shown in FIG.

Further, as in the fifth embodiment shown in FIG. 15, the cover member 30 may be configured to be stretchable in the front-rear direction of the image forming apparatus 100 in a state of being attached to the image forming apparatus 100. In this case, the position of the front end 30b of the cover member 30 can be changed in the front-rear direction according to the outer diameter dimensions D1 and D2 of the supply roll body 8 that changes depending on the usage state. Further, the cover member 30 may be stretchable in only one step in the front-rear direction, or may be stretchable in a plurality of steps.

Although each embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be further implemented in various forms without departing from the gist of the present invention. Is. The roll-shaped recording medium (roll body) used in the image forming apparatus according to the present invention includes plain paper (roll paper) and roll-shaped coated paper (coated paper or art paper). Etc.), tracing paper, transparencies, plastic films, prepregs, metal foils (copper foils, etc.).

1 Image forming part 8 Supply roll body 8a Lower end of maximum diameter of supply roll body 8b Front end of maximum diameter of supply roll body 9 Recovery roll body 14 Supply roll body holding part 15 Recovery roll body holding part 30 Cover member 30b Front end of cover member 33 Cover main body 34 Tilt 39 Tilt 40 Fixed 100 Image forming device 101 Main frame 200 Floor (mounting surface)

Japanese Unexamined Patent Publication No. 9-240888

Claims (10)

A cover member that covers a roll body that is a recording medium held in an image forming apparatus and wound in a roll shape.
It is arranged between the lower end of the maximum diameter of the roll body arranged at the lowest position and the mounting surface on which the image forming apparatus is placed, and at least the upper side of the roll body arranged at the lowest position is exposed. Cover member. Assuming that the side on which the operator is located at the time of operation with respect to the image forming apparatus is the front and the opposite side is the rear.
The cover member according to claim 1, wherein the front end of the cover member attached to the image forming apparatus is located behind the front end of the maximum diameter of the roll body arranged at the lowermost position. The cover member according to claim 1 or 2, which can expand and contract in the longitudinal direction of the roll body. Assuming that the side on which the operator is located at the time of operation with respect to the image forming apparatus is the front and the opposite side is the rear.
A cover main body portion that is attached to the image forming apparatus and is arranged between the lower end of the maximum diameter of the roll body arranged at the lowermost position and the mounting surface on which the image forming apparatus is placed. The cover member according to any one of claims 1 to 3, further comprising an inclined portion extending diagonally upward from the cover main body portion. Assuming that the side on which the operator is located at the time of operation with respect to the image forming apparatus is the front and the opposite side is the rear.
A cover main body portion that is attached to the image forming apparatus and is arranged between the lower end of the maximum diameter of the roll body arranged at the lowermost position and the mounting surface on which the image forming apparatus is placed. The cover member according to any one of claims 1 to 3, further comprising a front inclined portion extending diagonally upward from the cover main body portion and a rear inclined portion extending obliquely upward from the cover main body portion. The cover member according to any one of claims 1 to 5, which is arranged over the entire axial direction of the roll body arranged at the lowest position. The cover member according to any one of claims 1 to 6, which has a fixing portion that is pressed and fixed to the main body frame of the image forming apparatus. The cover member according to any one of claims 1 to 6, which has a fixing portion that is hooked and fixed to the main body frame of the image forming apparatus from above. Assuming that the side on which the operator is located at the time of operation with respect to the image forming apparatus is the front and the opposite side is the rear.
The cover member according to any one of claims 1 to 7, which can be expanded and contracted in the front-rear direction of the image forming apparatus while being attached to the image forming apparatus. A roll body holding portion that holds the roll body, which is a recording medium wound in a roll shape,
An image forming unit that forms an image on the recording medium,
The cover member according to any one of claims 1 to 9 and
An image forming apparatus comprising.

Images