JP2000323859A - Bracket member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bracket member for fastening a rivet which can reduce and simplify built-in operation process and reduce the part cost and the manufacturing cost since strictness is not required for part accuracy and built-in accuracy, when a plurality of plate members are fastened with a rivet in specified positional relation e.g. perpendicular to each other. SOLUTION: In a bracket member 10 which is used when a second plate member 2 is fastened with a rivet at right angles to a plate surface of a first plate member 1, the bracket member 10 has a base piece fastened to a first plate member, a cut and raised piece 12 which is formed by bending one end edge of a base piece at 90 deg. and is fastened to a second plate member, at least two rivet fastening holes 13, 14 formed in a base piece and positioning embossing part 15 and at least one rivet fastening hole 16 formed in a cut and raised piece.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a copying machine,
Facsimile, related to the structure constituting the skeleton of the image forming apparatus such as a printer, for example, in a structure to fasten the side plate material perpendicular to the base plate member, regardless of the bending shape of the member to be fastened, The present invention relates to a rivet-fastening bracket member that can reduce the cost of an unfinished product and the cost of assembling and setting by simply forming a hole for rivet fastening.

[0002]

2. Description of the Related Art Electronic devices such as image forming apparatuses and communication devices are assembled by assembling various components to a structure constituting a skeleton. FIGS. 9 (a), 9 (b), 9 (c), 9 (d) and 9 (e) are views for explaining the structure and fastening structure of a conventional structure. Here, as an example, a base plate member (first
Side plate member (second plate member) 2,
A structure that is fastened and fixed in a state where 3 are orthogonal to each other will be described. Conventionally, when the side plate members 2 and 3 are erected and fixed along two opposing edges of the base plate member 1 made of metal, resin, or the like, conventionally, the upper surface of the base plate member 1 is cut in place. By raising the rectangular fastening bent portion 5 (FIG. 9D)
(c)), and bent pieces 2A, 3A for fastening are formed on the bottom edges of the side plate members 2, 3, respectively. Also, as shown in FIGS. 9 (d) and 9 (e), rivets or screw holes 5a, 2a (3a) for communicating with each other at the time of fastening the bent portion 5 and the right and left side plate members 2, 3 respectively. To form Although a plurality of bent portions 5 are actually formed, an example in which only one is provided is shown here for the sake of illustration and description. Here, the procedure for fastening the side plate member 2 on the base plate member 1 by rivets will be mainly described. As shown in (a), the hole (hole diameter φd) of the bent portion 5 on the base plate member 1 is formed.
1) Assemble the side plate member 2 from the direction of arrow a so that the hole (hole diameter φd2) 2a of the side plate member 2 communicates with 5a.
Position as shown in (b). In this way, the temporary assembly before the rivet is fastened is completed. At this time, the bent portion 5 and the holes 5a and 2a respectively formed in the side plate members 2 communicate with each other as shown in (e), and the rivet is moved from the c direction (e) (b direction of (b)). Is inserted and swaged to perform fastening, and the side plate member 2 is fixed upright on the base plate member 1. The hole diameter accuracy of each of the holes 5a and 2a and the dimensional tolerances (including squareness, flatness, etc.) existing in the bent portion 5 and the side plate member 2, respectively.
And the fastening thickness L obtained by combining the thicknesses of the base plate member 1 and the side plate member 2 affect the dimensional tolerance (including squareness, flatness, etc.) after fastening. Folded part 5 and side plate member 2
In order to ensure the perpendicularity between the arrow direction d and the arrow direction e and the rigidity after fastening, the side plate member 2 has bent pieces (L
2A).

[0003]

As described above, when a structure is constructed by riveting the two plate members in a state where the two plate members are orthogonal to each other, for example, another side plate member is placed on the surface of the base plate member. When the fastening is performed by making the edges perpendicular to each other, a method is adopted in which the fastening bent portion is cut and raised at an appropriate position of the base plate member, and rivet fastening is performed by aligning holes with the side plate member. In addition, the conventional fastening bent portion 5
Is not formed, the bent piece 2A of the side plate member 2 is attached to the upper surface of the base plate member 1, and a hole (not shown) formed in the bent piece 2A and a not-shown hole formed in the upper surface of the base plate member are provided. The holes are connected to each other, and a rivet or the like is inserted into each of the holes. When such a fastening structure is adopted, it is necessary to insert a rivet fastening tool inside the side plate member 2 and then perform a rivet fastening operation, but it is often difficult to secure a working space with the rivet fastening tool. For this reason, it is necessary to form the fastening bent portion 5 on the base plate member so that the fastening operation can be freely performed using the rivet fastening tool from the outside of the side plate member 2, that is, the direction c in (e). However, in the fastening structure in which the fastening / folding portion 5 is formed on the base plate member 1, it is difficult to secure the accuracy between the fastening / folding portion 5 and the side plate member 2. In some cases, the fastening work had an adverse effect. In particular, the holes 5 formed in the fastening bent portion 5 and the side plate member 2 respectively.
For example, the positions and diameters of a and 2a are uniquely determined.
There are many restrictions on the determination of the shape of the rivet fastening portion, and distortion may occur at the time of rivet fastening, and the accuracy such as the perpendicularity and flatness of the side plate member 2 with respect to the fastening bent portion 5 may be deteriorated. Further, since the bent portion has a complicated shape that protrudes, disadvantageous inconvenience occurs when stocking and transporting the base plate member.

Further, in addition to the bent piece 2A bent inward, a bent piece (not shown) bent outward (in the direction d in FIG. 9 (e)) is provided at the bottom edge of the side plate member, so that the outer side is provided. A structure in which the bent piece and the upper surface of the base plate member are directly riveted is known, but a side plate member having two bent pieces projecting in different directions as described above has a right angle of each bent piece. In order to secure the precision at the same time, a complicated process is required, and the manufacturing cost becomes high in the bending process. In addition, since the shape of the side plate member is complicated, inconvenience occurs when stocking and transporting parts. The present invention has been made in view of the above, the accuracy of parts when riveting a plurality of members in a predetermined positional relationship,
Provided is a rivet fastening bracket member that can reduce the number of assembling work steps and simplify it because there is no requirement for strictness in assembling accuracy, and can also reduce component costs and manufacturing costs. It is an object.

[0005]

In order to solve the above-mentioned problems,
The invention according to claim 1 is a bracket member used when the second plate member is fastened with a rivet so as to be perpendicular to the plate surface of the first plate member, wherein the bracket member is a first plate member. A base piece fastened to the plate member and one end edge of the base piece
An upright piece formed by being bent to a degree and fastened to the second plate member, at least two rivet fastening holes and a positioning embossed portion formed in the base piece, and at least one formed in the upright piece. And a rivet fastening hole. The invention according to claim 2 is a diaphragm rib shape in which one end is integrated with the base piece and the other end is integrated with the bent piece at the center of the boundary between the base piece and the upright piece constituting the bracket member. A part is provided.
The invention according to claim 3 is characterized in that the first plate member or the second plate member fastened to the bracket member is made of metal or resin.

[0006]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Figures 1 (a) and (b)
FIG. 2 is a perspective view showing a rivet fastening structure according to an embodiment of the present invention, and a perspective view showing a state where a side plate member is attached.
(a) and (b) are perspective views and rear perspective views of an example of the bracket member of the present invention, and FIGS. 3 (a) and (b) are plan views and side views of the bracket member, and FIG. (B) is a front view of the bracket member and a cross-sectional view taken along line XX, FIG. 5 is a plan view of a main part showing an example of the arrangement of holes provided on the first plate member side, and FIG. FIGS. 7A and 7B are diagrams illustrating a procedure for riveting a second plate member on the plate member, and FIGS. 7A and 7B are diagrams illustrating a procedure for fastening using a rivet fastening tool. This rivet fastening structure will be described with respect to a structure in which second plate members 2 and 3 as side plate members are fastened and fixed to a first plate member 1 as a base plate member in an orthogonally upright state. This structure constitutes a housing and a skeleton of an image forming apparatus such as a copying machine, a printer, a facsimile machine, and a printing apparatus. This embodiment is a metal,
Alternatively, when the side plate members 2 and 3 are erected along two opposing edges of the base plate member 1 made of resin or the like, respectively,
It is characteristic that a special bracket member 10 is used. That is, instead of providing a bent portion by cutting and raising the base plate member 1 as in the related art, a special bracket member 10 is used to fasten the two members in an accurate positional relationship. It is.

The point that the bent pieces 2A and 3A for fastening are respectively formed on the bottom edges of the side plate members 2 and 3 is the same as the conventional example. As means for fastening the base plate member 1 and the respective side plate members 2 and 3 using the bracket member 10, rivets or screws or the like can be used. Here, mainly in the case of rivet fastening. explain. In addition, for convenience of explanation, a description will be mainly given of a case where the side plate member 2 is fastened to the base plate member 1. That is, in this embodiment, when the second plate member 2 having the bent bent piece 2A whose end edge is bent in an L shape is fastened to the fastening position on the base plate member 1, the bracket member is used. The bracket member 10 includes a base piece 11 fastened to the base plate member 1, an upright piece 12 formed by bending one end edge of the base piece 11 by 90 degrees, and a base piece 11 At least two rivet fastening holes 13 and 14 and a positioning embossed portion 15 formed on the upright piece 12. Each of the fastening holes 13, 14, 16 is a through hole having a diameter suitable for the rivet diameter to be used, and the embossed portion 15 is a circular projection protruding from the bottom surface of the base piece 11. A diaphragm rib shape having one end integrated with the base piece 11 and the other end integrated with the bent piece 12 at the center of a boundary line 10a between the base piece 11 and the bent piece 12 constituting the bracket member 10. The configuration in which the portion 17 is provided is also characteristic. Reference numeral 20 is a rivet. Also, as shown in FIG. 5, at appropriate places on the base plate member 11 side (bracket member mounting positions), the holes are connected to the fastening holes 13 and 14 provided in the base piece 11 of the bracket member 10 and fastened by rivets. Holes 21 and 22 and a long hole 23 into which the embossed portion 15 is fitted are formed. The elongated hole 23 is a means for receiving the embossed portion 15 and allowing the bracket member 10 to advance and retreat along the longitudinal direction f. Since the fastening with the rivet 20 is performed using the rivet fastening tool 25, the positions of the holes 13, 14, 16 are arranged in consideration of the diameter φd1 of the nose housing 26 of the rivet fastening tool 25. That is, when the rivet is fastened, the nose housing 26
The distance L3 (FIG. 3) from the center point of each of the fastening holes 13 and 14 provided on the base piece 11 to the upright piece 12 is set so that the outer diameter of the upright piece 12 and the base piece 11 do not interfere with each other. The distance from the center point of the fastening hole 16 provided on the upright piece 12 to the base piece 11 is set to be equal to or slightly longer than the radius of the nose housing 26. . Thus, interference of the tool during the rivet setting operation can be prevented, and workability can be improved.

Next, as shown in FIG. 2 (a) and FIG. 3 (b), in order to prevent the upright piece 12 of the bracket member 10 from inclining in the directions of arrows g and h with respect to the base piece 11, In order to maintain the right-angle accuracy of the standing piece 12 with respect to the piece 11, a drawing rib-shaped portion 17 is provided at the center of the L-shaped bent portion of the bracket member 10 for a highly rigid structure and for maintaining high accuracy of the right angle. ,
In order to make the thickness of the drawn rib-shaped part 17 uniform, the relief part 17a of the drawn rib-shaped part is pressed at an angle θ1 at the intersection of the base piece 11 and the upright piece 12 of the bracket member (in the case of sheet metal). It is formed by. Also, the upper and lower ends of the drawn rib-shaped portion 17 have an R shape R1, and the strength of each engaging portion between the upper and lower ends of the drawn rib-shaped portion 17 and the standing piece 12 and the base piece 12 is increased. I have. Rivet fastening holes 13, 1
It is desirable that the pressing directions 4 and 16 be in the direction of an arrow i in order to prevent burrs. Further, as shown in FIG. 2 (b) and the like, an R shape R2 is formed at the corner of the relief portion 17a of the aperture rib-shaped portion 17 for burr reduction and aperture.

The embossed portion (projection) 15 has a projection L1 shown in FIGS. 2 and 3 and a dimension L shown in FIG.
2 (the plate thickness of the base piece 11) is determined by the following formula: L1 ≧ L
The embossed portion 15 has a long hole 23 (L4 × L) formed in the base plate member 1 on the fastening side shown in FIG.
5), so that positioning in one direction can be performed. For example, the minor axis L4 dimension of the long hole 23 = the embossed portion 15
Outside diameter (not shown) + 0-0.05mm,
The pitch dimension L6 between the rivet fastening holes 13 and 14 on the base piece 11 and the rivet fastening holes 21 and 22 on the base plate member 1 side
The pitch dimension L7 between them is determined based on the dimensional tolerance of ± 0.02, and the combination dimension of the component parts is determined. By using this bracket member 10, a flexible fastening shape can be proposed, and fastening strength and dimensional accuracy between the fastening members can be reliably ensured. Next, a procedure for fastening the side plate member 2 on the base plate member 1 in an orthogonal state using the bracket member 10 will be described. First, before fastening the side plate member 2 to the base plate member 1, the bracket member 10 is fastened to the fastening position on the base plate member 1 (FIGS. 1A and 7). On the bottom surface of the base piece 11 of the bracket member 10, a circular embossed portion 15 for positioning with the base plate member 1 is formed so as to protrude therefrom. It fits into the hole 23 and performs alignment in the arrow direction f. The rivet 20 is first fastened to the base plate member 1 using a rivet fastening tool 20 as shown in FIG.

Subsequently, as shown in FIG. 6, the rivet 20 is inserted from the direction of the arrow j in a state where the fastening hole 16 provided in the upright piece 12 is communicated with a hole (not shown) provided in the side plate member 2 and caulked. It is concluded by doing. By these fastening operations, the fastening of the two plate members 1 and 2 by the bracket member is surely completed. Further, the angle accuracy θ1 is also ensured. Next, FIG. 8 shows a state in which a fastening operation is actually performed using a rivet fastening tool, and the bracket member 10 is previously set.
The base plate member 1 to which is fastened is tilted at an angle θ2, held by a rivet fastening jig (not shown), and the side plate member 2 is fastened from the side by a rivet fastening tool 20 to increase the working efficiency. As described above, the two plate members 1, 2 which are fastened orthogonally using the bracket members for fastening rivets.
By fastening (or 3), inexpensive, high-rigidity, high-precision rivet fastening can be provided. In the above embodiment, for convenience of explanation, the case of fastening with rivets has been described, but this is an example, and the bracket member of the present invention can also be fastened with another fastening member such as a screw. Therefore, the rivet in the present specification,
This is a concept including other fastening members such as screws.

[0011]

As described above, according to the present invention, strictness is not required for a predetermined positional relationship between a plurality of plate members, for example, a component accuracy and an assembly accuracy when riveting in an orthogonal state. Therefore, it is possible to provide a bracket member for fastening rivets, which can reduce the number of assembling work steps and simplify it, and can reduce the cost of parts and the cost of manufacturing. That is,
According to the first aspect of the present invention, when the base plate member and the side plate members are fastened to each other, the L-shaped bracket member is used, so that the direction in which the bent pieces provided at the edges of the side plate members are formed is restricted. It is possible to provide a rivet fastening bracket member suitable for the intended use. According to the second aspect of the present invention, since the throttle rib-shaped portion is provided at the center of the boundary between the base piece and the upright piece that are orthogonal to each other, a highly rigid structure and high accuracy of a right angle can be secured. The invention according to claim 3 is applicable even if the plate member on the side to be fastened to the bracket member is made of metal or resin.

[Brief description of the drawings]

1A and 1B are a perspective view showing a rivet fastening structure according to an embodiment of the present invention, and a perspective view showing a state where a side plate member is attached.

FIGS. 2A and 2B are a perspective view and a rear perspective view of an example of a bracket member of the present invention.

FIGS. 3 (a) and (b) are plan views of the bracket member,
And a side view.

4 (a) and (b) are front views of the bracket member,
And XX sectional drawing.

FIG. 5 is an essential part plan view showing an example of the arrangement of holes provided on the first plate member side.

FIG. 6 shows a second member on a first plate member by a bracket member.
The figure explaining the procedure of riveting the plate member of FIG.

FIGS. 7A and 7B are diagrams showing a procedure for fastening using a rivet fastening tool.

FIG. 8 is a diagram showing another procedure for fastening using a rivet fastening tool.

9A to 9E are explanatory diagrams of a conventional example.

[Description of Signs] 1 Base plate member (first plate member), 2 and 3 Side plate member (second plate member), 10 bracket members, 11 base pieces, 12 upright pieces, 13, 14, 16 fastening holes , 15
Embossed part, 17 drawn rib-shaped part, 20 rivets (screw), 21, 22, holes, 23 long holes, 25 rivet fastening tool, 26 nose housing.

Claims (3)

[Claims] 1. A bracket member used for fastening a second plate member with a rivet perpendicular to a plate surface of a first plate member, wherein the bracket member is a first plate member. And an upright piece formed by bending one edge of the base piece by 90 degrees to be fastened to the second plate member, and at least two rivet fastening holes formed in the base piece. A bracket member comprising: a positioning embossed portion; and at least one rivet fastening hole formed in the upright piece. 2. A diaphragm rib-shaped portion having one end integrated with the base piece and the other end integrated with the bent piece is provided at the center of the boundary between the base piece and the upright piece constituting the bracket member. The bracket member according to claim 1, wherein the bracket member is provided. 3. The bracket member according to claim 1, wherein the first plate member or the second plate member fastened to the bracket member is made of metal or resin.