CN-122027745-A - Recording medium conveying device and image forming apparatus

Abstract

A recording medium conveying device includes a belt member that moves in a circulating manner and has a hole portion for passing air from an outer peripheral surface side to an inner peripheral surface side of the belt member, and conveys a recording medium attached to the outer peripheral surface, and a protruding portion that protrudes from the outer peripheral surface of the belt member and is provided so as to surround the hole portion.

Inventors

• MIYOSHI NORIYUKI
• Fuda Hirohira
• Shinozaki Kingo
• Nakajima Hangpei

Assignees

• 富士胶片商业创新有限公司

Dates

Publication Date

20260512

Application Date

20250427

Priority Date

20241111

Claims (9)

1. 1. A recording medium transfer device is provided with: a belt member that circulates and has a hole portion for passing air from an outer peripheral surface side to an inner peripheral surface side of the belt member, a recording medium that is conveyed and attached to the outer peripheral surface, and A protruding portion provided in a state protruding from the outer peripheral surface of the belt member and provided so as to surround the hole portion.
2. 2. The recording medium transfer apparatus according to claim 1, wherein, The protruding parts are provided in plurality and are configured in a grid shape, The hole is surrounded by a projection located around the hole among the plurality of projections arranged in a grid shape.
3. 3. The recording medium transfer apparatus according to claim 2, wherein, The protruding portions arranged in a grid shape are each arranged in a state of being inclined with respect to a moving direction of the belt member.
4. 4. The recording medium transfer apparatus according to claim 1, wherein, A plurality of annular protruding portions as the protruding portions are provided on the outer peripheral surface of the belt member, The area of the hole portion is smaller than the area of the region surrounded by one of the annular protruding portions.
5. 5. The recording medium conveying apparatus according to any one of claims 1 to 4, wherein, The protruding portions are arranged in a line shape, The width of the protruding part is within 1.5 mm.
6. 6. The recording medium transport apparatus according to claim 5, wherein, The protruding parts are provided in plurality and are configured in a grid shape, The distance between the protruding portions extending in the common direction and adjacent to each other is 1.2mm or more.
7. 7. The recording medium conveying apparatus according to any one of claims 1 to 6, wherein, The protruding parts are provided in plurality and are configured in a grid shape, The pitch between the protruding portions extending in the common direction and adjacent to each other becomes a value obtained by multiplying the width of the protruding portion by 0.8 or more.
8. 8. The recording medium conveying apparatus according to any one of claims 1 to 7, wherein, The protruding parts are provided in plurality and are configured in a grid shape, The hole is surrounded by a projection located around the hole among the plurality of projections arranged in a grid shape, By arranging the protruding portions in a grid shape, a plurality of protruding portions having a rectangular shape are provided on the outer peripheral surface, The area of the region surrounded by the rectangular protruding portion is 5% or more and 80% or less of the area of the hole portion.
9. 9. An image forming apparatus includes: an image forming unit that forms an image on a recording medium; A heating device for heating the recording medium with the image formed by the image forming part, and A recording medium conveyance device that conveys the recording medium on which the image is formed by the image forming section to the heating device or conveys the recording medium that has passed through the heating device, The recording medium transfer device has the structure of any one of claims 1 to 8.

Description

Recording medium conveying device and image forming apparatus Technical Field The present invention relates to a recording medium conveying apparatus and an image forming apparatus. Background Patent document 1 discloses a structure in which a through hole penetrating in the thickness direction and a convex portion protruding in the thickness direction on the belt conveying surface side are provided in a belt main body. Patent document 1 Japanese patent laid-open No. 2002-137840 Disclosure of Invention In a device for conveying a recording medium such as paper, for example, the recording medium may be conveyed in a state in which the recording medium is attached to an outer peripheral surface of a belt member that is moving in a circulating manner. The belt member is provided with, for example, a suction hole portion to which the recording medium is sucked, whereby the recording medium is attached to the belt member. Here, if the protruding portion is provided on the outer peripheral surface of the belt member, the contact area between the belt member and the recording medium can be reduced. On the other hand, in this case, the recording medium may not be easily attracted to the hole. If the recording medium is less likely to be attracted to the hole, the adhesion of the recording medium to the outer peripheral surface of the belt member is reduced. The purpose of the present invention is to suppress the decrease in adhesion of a recording medium to the outer peripheral surface of a belt member due to the provision of a protruding portion on the outer peripheral surface of the belt member, as compared to the case where the protruding portion protruding from the outer peripheral surface of the belt member is not provided so as to surround a hole portion provided in the belt member. The invention described in claim 1 is a recording medium conveying device comprising a belt member that circulates and has a hole portion for passing air from an outer peripheral surface side to an inner peripheral surface side of the belt member, and conveys a recording medium attached to the outer peripheral surface, and a protruding portion that protrudes from the outer peripheral surface of the belt member and is provided so as to surround the hole portion. The invention described in claim 2 is the recording medium transport device described in claim 1, wherein the plurality of protruding portions are provided and are arranged in a grid shape, and the hole is surrounded by protruding portions located around the hole among the plurality of protruding portions arranged in a grid shape. In the invention described in claim 3, in the recording medium transport device described in claim 2, the projecting portions arranged in a grid shape are each arranged in a state of being inclined with respect to the moving direction of the belt member. In the invention described in claim 4, in the recording medium conveying apparatus described in claim 1, a plurality of annular protruding portions are provided as the protruding portions on the outer peripheral surface of the belt member, and an area of the hole portion is smaller than an area of a region surrounded by one of the annular protruding portions. The invention described in claim 5 provides the recording medium transport device according to any one of claims 1 to 4, wherein the protruding portion is provided in a linear shape, and the protruding portion has a width of 1.5mm or less. The invention described in claim 6 provides the recording medium transport device described in claim 5, wherein the plurality of protruding portions are provided and are arranged in a grid shape, and a pitch between the protruding portions extending in a common direction and adjacent to each other is 1.2mm or more. The invention described in claim 7 is the recording medium conveying apparatus according to any one of claims 1 to 6, wherein the plurality of protruding portions are provided and are arranged in a grid shape, and a pitch between the protruding portions extending in a common direction and adjacent to each other is equal to or larger than a value obtained by multiplying a width of the protruding portion by 0.8. The invention described in claim 8 provides the recording medium conveying apparatus according to any one of claims 1 to 7, wherein the plurality of protruding portions are provided and are arranged in a grid shape, the hole is surrounded by protruding portions located around the hole among the plurality of protruding portions arranged in a grid shape, the plurality of rectangular protruding portions are provided on the outer peripheral surface by arranging the protruding portions in a grid shape, and an area of a region surrounded by the rectangular protruding portions is 5% or more and 80% or less of an area of the hole. The invention described in claim 9 is an image forming apparatus including an image forming portion that forms an image on a recording medium, a heating device that heats