JP2009068554A - Member installing structure and image formation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To install a resin member in an accurate position with respect to a sheet metal member by preventing shavings generated from the resin member from being sandwiched between the resin member and the sheet metal member, when installing the resin member formed of a synthetic resin material on the sheet metal member formed of sheet metal. <P>SOLUTION: This installation structure for installing a synthetic resin cover member 40 in a sheet metal frame member 20, has a positioning projection 42 arranged on an inner surface 40d contacting with the frame member 20 in the cover member 40, a positioning hole 22 arranged on an outside surface 20d contacting with the cover member 40 in the frame member 20, and a recess part 43 arranged in the cover member 40. When inserting the positioning projection 42 into the positioning hole 22, the shavings 61 by shaving out the positioning projection 42 by an edge part of the positioning hole 22, are released to the recess part 43. The recess part 43 is composed of a groove part formed on the inner surface 40d around the positioning projection 42 in the cover member 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a member attachment structure for attaching a member made of a synthetic resin material to a member made of sheet metal, and an image forming apparatus including the member attachment structure.

Some cases of image forming apparatuses such as copiers and facsimile machines have an attachment structure for attaching a member made of a synthetic resin material to a member made of sheet metal. For example, a mounting structure for attaching a synthetic resin cover member to a sheet metal frame member. In this mounting structure, in order to easily and reliably position the cover member with respect to the frame member, a positioning protrusion formed on the cover member may be inserted into a positioning hole formed on the frame member.
Japanese Patent Laid-Open No. 10-142875

  However, when the positioning protrusion of the cover member is inserted into the positioning hole of the frame member, the positioning protrusion is rubbed against the edge of the positioning hole, so that the positioning protrusion is scraped and shavings are generated. When the shavings are sandwiched between the frame member and the cover member, there is a problem that the cover member cannot be attached at a regular position.

  In particular, in the image forming apparatus, the cover member attached to a portion that is noticeable by the user cannot prevent the projection from being exposed on the outer surface in order to prevent the design from being damaged. Therefore, positioning protrusions are formed on the inner surface of the cover member, and positioning holes are formed in the frame member. However, if there are positioning protrusions on the inner surface of the cover member, when attaching the cover member to the frame member, an operator may not be able to attach it while visually observing the positioning protrusions. In this case, the positioning protrusions must be inserted into the positioning holes by groping. If it does so, since it becomes easy to rub a positioning protrusion on the edge of a positioning hole, it becomes further easy to produce the shavings of a positioning protrusion. In addition, when the positioning protrusion is provided on the inner surface of the cover member, it is difficult to perform the work of removing the shavings protruding from the positioning protrusion.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and the purpose of the present invention is to remove shavings generated from a resin member when a resin member made of a synthetic resin material is attached to a sheet metal member made of a sheet metal. It is an object of the present invention to provide a member mounting structure that can prevent the resin member from being sandwiched between them and to attach a resin member at an accurate position with respect to the sheet metal member, and an image forming apparatus including the member mounting structure.

  In order to solve the above problems, the member mounting structure of the present invention is a member mounting structure for mounting a resin member made of a synthetic resin material to a sheet metal member made of sheet metal, the resin member being provided on the sheet metal. A contact portion that contacts the sheet metal member when attached to the member, a protruding portion that protrudes from the contact portion, a contacted portion that contacts the contact portion when the resin member is attached to the sheet metal member, and contacted An opening for inserting a protruding portion provided in the portion, and a hollow portion provided in the contact portion or protruding portion of the resin member for releasing the shavings that the protruding portion is shaved off by the opening.

  According to this configuration, when the protruding portion is inserted into the opening, the protruding portion rubs against the opening so that the shavings generated from the protruding portion are released to the recessed portion. Therefore, it is possible to prevent shavings from being sandwiched between the resin member and the sheet metal member. Thereby, attachment to the exact position of a resin member can be performed easily and reliably. Moreover, since the operation | work which removes the shavings which come out between a resin member and a sheet-metal member when attaching a resin member to a sheet-metal member is reduced, the efficiency of the attachment operation | work of a member improves.

  In the above mounting structure, the protrusion is a positioning projection for positioning the resin member with respect to the sheet metal member when the resin member is attached to the sheet metal member, and the opening is a positioning hole for inserting the positioning projection. Also good.

  When positioning protrusions are provided on the resin member and positioning holes are provided on the sheet metal member, the positioning protrusions are easily scraped off at the edges of the positioning holes when the positioning protrusions are inserted into the positioning holes. According to the structure, since the shavings of the positioning protrusion are released to the recessed portion, it is possible to effectively prevent the shavings from being sandwiched between the resin member and the sheet metal member.

  In the mounting structure described above, the recess may be a groove formed in a contact portion on the outer periphery of the protruding portion.

  According to this configuration, the shavings coming out from the protruding portion can be surely released to the hollow portion, so that it is possible to effectively prevent the shavings from being sandwiched between the resin member and the sheet metal member.

  In the mounting structure described above, the recess may be a groove formed in the protrusion.

  According to this configuration, the shavings coming out from the protruding portion can be surely released to the hollow portion, so that it is possible to effectively prevent the shavings from being sandwiched between the resin member and the sheet metal member.

  In the above mounting structure, the contact portion may be a tip portion of a rib formed on a portion of the resin member facing the sheet metal member, and the recess portion may be formed by cutting out the tip portion of the rib.

  According to this configuration, it is possible to effectively prevent the shavings from being caught in the portion where the tip end portion of the rib contacts the sheet metal member.

  An image forming apparatus according to the present invention includes a housing having a part formed by attaching a resin member made of a synthetic resin material to a sheet metal member made of sheet metal, and a device housed in the housing. As an attachment structure to be attached to the sheet metal member, any one of the above-described member attachment structures is provided.

  According to this structure, when attaching a resin member to a sheet metal member, it can prevent that the shavings of a protrusion part are pinched | interposed between a resin member and a sheet metal member. Therefore, the resin member can be easily and reliably attached to an accurate position, and the assembly accuracy of the image forming apparatus is improved. In addition, since the work of removing shavings from the projecting portion when the resin member is attached to the sheet metal member, the assembly efficiency of the image forming apparatus is improved.

  In the above-described image forming apparatus, the sheet metal member may be a frame member that constitutes a housing, and the resin member may be a cover member that is attached to the frame member.

  According to this configuration, the accuracy of attaching the cover member to the frame member is improved, and the design of the image forming apparatus is improved. Further, since the cover member can be easily attached to the frame member, the efficiency of the assembly operation of the image forming apparatus is improved.

  According to the member mounting structure of the present invention, when the resin member is attached to the sheet metal member, it is possible to prevent the shavings from the protruding portion of the resin member from being sandwiched between the resin member and the sheet metal member. Can be attached to the correct position.

  FIG. 1 is a perspective view illustrating an external configuration example of an image forming apparatus according to an embodiment of the present invention. First, a schematic overall configuration of the image forming apparatus will be described with reference to FIG. The image forming apparatus to which the present invention is applied may be any of a copier, a facsimile machine, a printer, or a so-called multifunction machine having these functions. The image forming apparatus 1 shown in FIG. 1 includes a reading unit 2 disposed on the upper side and a recording unit 3 disposed on the lower side.

  The reading unit 2 is attached to a reading device 4 that scans and reads an image of a document, an operation panel 5 attached to the front surface of the reading device 4, and a hinge mechanism (not shown) that can be opened and closed on the upper side of the reading device 4. A document presser cover 6 is provided. At one end of the document pressing cover 6, an automatic document feeder (ADF) 7 that transports the document to the reading device 4 is installed. The ADF 7 sequentially transports a plurality of documents placed on the document supply tray 8 to the reading device 4, reads an image of the document by the reading device 4, and then discharges the document to the document discharge tray 9. ing. On the other hand, the recording unit 3 is provided with a paper feeding device 10 that supplies recording paper and a recording device 11 that records an image on the recording paper supplied from the paper feeding device 10.

  FIG. 2 is a diagram illustrating a configuration example of the reading device 4. In the figure, only the portion of the reading device 4 in the image forming apparatus 1 is shown, and the other portions are not shown. The reading device 4 includes a housing 13 formed in a substantially rectangular box shape. Housed in the housing 13 is a scanner unit (not shown) installed so as to be movable in the scanning direction. A platen glass 14 on which a document is placed is installed on the upper surface of the housing 13. The image of the document placed on the platen glass 14 is read by the scanning of the scanner unit. An operation panel 5 is installed on the front surface of the housing 13. The housing 13 is formed by appropriately combining a plurality of frame members 20 made of sheet metal. A cover member 40 made of a synthetic resin material is attached to the outer surface of the frame member 20. Thus, the housing | casing 13 has a component formed by attaching the cover member 40 which consists of synthetic resin materials to the frame member 20 comprised with the sheet metal. Hereinafter, a mounting structure for attaching the cover member 40 to the frame member 20 will be described in detail.

  FIG. 3 is a diagram showing an attachment structure for attaching the cover member (resin member) 40 to the frame member (sheet metal member) 20, and is an exploded perspective view in a state where the cover member 40 is removed from the frame member 20. FIG. 4 is a perspective view showing the inner surface of the cover member 40 (the surface on the frame member 20 side). The frame member 20 is a member that constitutes one side portion of the housing 13 and includes upper and lower walls 20a and 20b and a side wall 20c that are integrally formed by appropriately bending a sheet metal. On the other hand, the cover member 40 is a plate-like member made of a synthetic resin material, and has an upper wall 40a and a side wall 40c that are integrally formed so as to cover the outer surfaces of the upper wall 20a and the side wall 20c of the frame member 20. Configured.

  The side wall 40c of the cover member 40 is provided with a screw through hole 41 through which the screw 60 passes. The screw through holes 41 are provided at two locations on the side wall 40c. A screw fixing hole 21 for fixing the screw 60 is provided in the side wall 20c of the frame member 20. The screw fixing holes 21 are provided at two locations corresponding to the screw through holes 41 in the side wall 20c. The cover member 40 is fixed to the frame member 20 by fixing the screw 60 passed through the screw through hole 41 to the screw fixing hole 21.

  As shown in FIG. 4, positioning protrusions (projections) 42 are formed on the inner surface 40 d of the side wall 40 c of the cover member 40. FIG. 5 is a partially enlarged sectional view of the positioning protrusion 42 and the vicinity thereof. The positioning protrusions 42 are respectively formed inside the screw through holes 41. The positioning protrusion 42 is a small protrusion having a substantially cylindrical shape. A recess 43 is formed on the inner surface 40d at a position surrounding the positioning protrusion 42. The hollow portion 43 is formed of a substantially circular groove portion formed on the inner surface 40d.

  On the other hand, as shown in FIG. 3, a positioning hole (opening) 22 made of a circular through hole is formed in the side wall 20 c of the frame member 20. The positioning hole 22 is formed at a position corresponding to the positioning protrusion 42 on the side wall 20c. The inner diameter of the positioning hole 22 is formed to be substantially the same as or slightly larger than the outer diameter of the positioning protrusion 42.

  6 and 7 are views for explaining the insertion state of the positioning projection 42 into the positioning hole 22 when the cover member 40 is attached to the frame member 20. In order to attach the cover member 40 to the frame member 20, first, as shown in FIG. 3, the side wall 40 c of the cover member 40 is put on the outer surface 20 d of the side wall 20 c of the frame member 20. At this time, as shown in FIG. 6, the positioning projection 42 of the cover member 40 is inserted into the positioning hole 22 of the frame member 20. At this time, it is necessary to align the positioning protrusion 42 with the positioning hole 22 and insert it. However, when the cover member 40 is put on the frame member 20, the operator cannot see the inner surface 40d of the side wall 40c. For this reason, the positioning protrusion 42 is inserted into the positioning hole 22 while rubbing against the inner periphery of the positioning hole 22.

  A cut surface of the sheet metal is exposed at the inner peripheral edge of the positioning hole 22. Therefore, when the positioning protrusion 42 rubs against the inner peripheral edge of the positioning hole 22, the positioning protrusion 42 is scraped to generate shavings. On the other hand, the cover member 40 is attached to the frame member 20 such that the inner surface (contact portion) 40d of the side wall 40c is in contact with the outer surface (contacted portion) 20d of the side wall 20c of the frame member 20. Therefore, when the shavings are sandwiched between the inner surface 40d of the cover member 40 and the outer surface 20d of the frame member 20, a gap is generated between the inner surface 40d and the outer surface 20d, and the cover member 40 is accurately positioned with respect to the frame member 20. Can not be installed in position.

  Therefore, in the cover member 40 of the present embodiment, the recessed portion 43 is provided around the positioning projection 42. By providing the recess 43, as shown in FIG. 7, the shavings 61 coming out of the positioning projection 42 when the cover member 40 is attached to the frame member 20 can be released to the recess 43. Thereby, it is possible to prevent the shavings 61 from being sandwiched between the inner surface 40d of the cover member 40 and the outer surface 20d of the frame member 20. Therefore, the cover member 40 can be easily and reliably attached to an accurate position. Further, since the recess 43 is provided, when attaching the cover member 40 to the frame member 20, it is not necessary to remove the shavings 61 from the positioning protrusion 42 from between the cover member 40 and the frame member 20. Or, the labor of this work is reduced as compared with the prior art. Therefore, the efficiency of the assembly work of the housing 13 is improved.

  8 and 9 are diagrams showing another configuration example of the cover member, FIG. 8 is a perspective view showing the inner surface of the cover member 40-2, and FIG. 9 is a positioning protrusion provided in the cover member 40-2. FIG. 42 is a partial enlarged cross-sectional view of 42 and the vicinity thereof. The cover member 40-2 includes reinforcing ribs 45 formed on the inner surface 40d of the side wall 40c. The rib 45 is formed as a linear protrusion protruding along the inner surface 40d of the side wall 40c. A plurality of ribs 45 are formed in the horizontal direction and the vertical direction on the inner surface 40d of the side wall 40c, and the vertical ribs 45 and the horizontal ribs 45 intersect at the position of the positioning protrusions 42.

  As shown in FIG. 9, a recessed portion 43-2 in which the distal end surface 45 a is recessed is formed on the distal end surface (front end portion) 45 a of the rib 45 around the positioning protrusion 42. The recessed portion 43-2 is formed by cutting out the front end surface 45a of the portion where each rib 45 is joined to the positioning projection 42. The cover member 40-2 is attached to the frame member 20 in a state where the front end surface 45 a of the rib 45 is in contact with the outer surface 20 d of the side wall 20 c of the frame member 20. At that time, by providing the depression 43-2, the shavings coming out of the positioning projection 42 are released to the depression 43-2. Therefore, it is possible to effectively prevent the shavings from being sandwiched between the front end surface 45a of the rib 45 and the frame member 20.

  FIG. 10 is a diagram illustrating another configuration example of the cover member. In the drawing, a positioning projection and a cross section in the vicinity thereof in a state where the cover member is attached to the frame member are shown. The cover member 40-3 shown in the figure has a recess 43-3 in the positioning projection 42. The recess 43-3 is formed of an annular groove formed around the root portion of the positioning protrusion 42. Also by providing the recess 43-3 at this position, the shavings 61 coming out of the positioning projection 42 can be released to the recess 43-3, so that the shavings 61 are interposed between the cover member 40 and the frame member 20. It can prevent pinching.

  In the above embodiment, the example in which the member mounting structure of the present invention is applied to the image forming apparatus 1 has been shown. However, as the member mounting structure of the present invention, a member made of a synthetic resin material is a member made of sheet metal. As long as the mounting structure is attached, it can be applied not only to the image forming apparatus 1 but also to other apparatuses and parts. Even when applied to the image forming apparatus 1, in addition to the mounting structure of the frame member 20 and the cover member 40 constituting the housing 13 of the reading device 4, the mounting structure of other members installed at other locations is also used. It is also possible to apply.

  In addition, the specific shape, arrangement, and number of the protrusions, openings, or depressions included in the member mounting structure according to the present invention are not limited to those shown in the above embodiment, and other shapes, arrangements, and numbers It is also possible to do.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims, the specification, and the drawings. Is possible. It should be noted that any shape, structure, and material not directly described in the specification and drawings are within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited.

1 is a diagram illustrating an external configuration example of an image forming apparatus according to an embodiment of the present invention. 1 is a diagram illustrating an external configuration example of a reading device included in an image forming apparatus. It is a figure which shows the attachment structure which attaches a cover member to a frame member. It is a perspective view which shows the inner surface of a cover member. It is a partial expanded sectional view which shows the positioning protrusion provided in the cover member, and its vicinity. It is a figure for demonstrating the insertion state to the positioning hole of a positioning protrusion. It is a figure for demonstrating the insertion state to the positioning hole of a positioning protrusion. It is a figure which shows another cover member. It is a partial expansion sectional view of the positioning protrusion with which other cover members are provided, and its neighborhood. It is a partial expansion sectional view of the positioning protrusion with which other cover members are provided, and its neighborhood.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2 Reading part 3 Recording part 4 Reading apparatus 5 Operation panel 6 Original pressing cover 7 Automatic original conveying apparatus (ADF)
8 Document supply tray 9 Document discharge tray 10 Paper feeder 11 Recording device 13 Housing 14 Platen glass 20 Frame member (sheet metal member)
20c Side wall 20d Outer surface (contacted part)
21 Screw fixing hole 22 Positioning hole (opening)
40 Cover member (resin member)
40c Side wall 40d Inner surface (contact part)
41 Screw through hole 42 Positioning protrusion (protrusion)
43 hollow 45 rib 45a tip surface (tip)
60 screw 61 shavings

Claims (7)

It is an attachment structure of a member for attaching a resin member made of a synthetic resin material to a sheet metal member made of sheet metal,
A contact portion that is provided on the resin member, and contacts the sheet metal member when the resin member is attached to the sheet metal member; and a protruding portion that protrudes from the contact portion;
A contacted portion that is provided on the sheet metal member and contacts the contact portion when the resin member is attached to the sheet metal member; and an opening that inserts the protrusion provided on the contacted portion;
An attachment structure for a member, comprising: a recessed portion that is provided at the contact portion or the protruding portion of the resin member, and the protruding portion allows the shavings that are scraped off by the opening to escape.   The protrusion is a positioning protrusion for positioning the resin member with respect to the sheet metal member when the resin member is attached to the sheet metal member, and the opening is a positioning hole for inserting the positioning protrusion. The member mounting structure according to claim 1, wherein:   The member mounting structure according to claim 1, wherein the recess is a groove formed in the contact portion on an outer periphery of the protrusion.   The member mounting structure according to claim 1, wherein the recess is a groove formed in the protrusion.   The contact portion is a tip portion of a rib formed on a portion of the resin member facing the sheet metal member, and the recess portion is formed by cutting out the tip portion of the rib. Item 4. The member mounting structure according to any one of Items 1 to 3. A housing having a part formed by attaching a resin member made of a synthetic resin material to a sheet metal member made of sheet metal, and a device housed in the housing,
An image forming apparatus comprising the member mounting structure according to claim 1 as an mounting structure for mounting the resin member to the sheet metal member.   The image forming apparatus according to claim 6, wherein the sheet metal member is a frame member constituting the housing, and the resin member is a cover member attached to the frame member.

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