JP3504642B2 - Image forming device housing - Google Patents

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、画像形成装置の枠
組を構成し、内部機器を支持する筐体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing that constitutes a framework of an image forming apparatus and supports internal equipment.

【０００２】[0002]

【従来の技術】従来から、画像形成装置の枠組として用
いられる筐体としては、角型の中空形状のパイプ（以
下、角パイプとする）を組み立てた筐体が使用されてい
る。この角パイプ製の筐体は、角パイプが有する強度を
有するため、筐体として組み立てた場合に強度を確保す
ることができる。また、板金をプレス加工により打ち抜
いたものを前後面の側板として組み立てた筐体も提案さ
れている。この板金製の筐体は、前後面の側板の下部が
ビス止めによってベース部材に取り付けると共に、両側
板の間に懸架部材をビス止めして組み立てられる。この
板金製の筐体の場合、角パイプ製の筐体よりも製造コス
トが安くなるという利点がある。2. Description of the Related Art Conventionally, as a casing used as a frame of an image forming apparatus, a casing in which a rectangular hollow pipe (hereinafter referred to as a square pipe) is assembled is used. Since the case made of the square pipe has the strength of the square pipe, the strength can be ensured when assembled as a case. Further, there is also proposed a housing in which sheet metal stamped by press working is assembled as front and rear side plates. The housing made of sheet metal is assembled by attaching the lower parts of the front and rear side plates to the base member by screwing, and fixing the suspension member between both side plates by screws. The case made of sheet metal has an advantage that the manufacturing cost is lower than that of the case made of square pipe.

【０００３】[0003]

【発明が解決しようとする課題】上述のように、角パイ
プ製の筐体は、強度を有する反面、製造コストが高いと
いう問題を有している。一方、板金製の筐体は製造コス
トが安い反面、強度が十分ではないという問題がある。
板金製の筐体を大型の装置に適用した場合は、筐体の基
体となる前後面の側板に撓み（ひずみ）が発生しやす
く、筐体内に備え付けた内部機器の位置精度がひずみ等
の影響で保てなくなる。例えば、レーザ光を感光体表面
に照射したときに形成される静電潜像の精度が低下した
り、また、画像形成を高速処理する場合に装置本体に振
動が発生してずれが生じ、画質が低下するという問題が
発生する。As described above, the casing made of square pipe has a problem that it has a high manufacturing cost although it has strength. On the other hand, although the housing made of sheet metal is low in manufacturing cost, it has a problem that the strength is not sufficient.
When a sheet metal case is applied to a large-scale device, the side plates on the front and rear surfaces, which are the base of the case, are likely to bend (strain), and the positional accuracy of the internal equipment installed inside the case is affected by distortion. I can't keep it. For example, the accuracy of the electrostatic latent image formed when the surface of the photoconductor is irradiated with laser light is reduced, or when the image formation is processed at high speed, vibration occurs in the main body of the device, resulting in misalignment. The problem arises that

【０００４】本発明は、上述した問題点を解決するため
になされたものであり、製造コストの安い板金製の側板
を使用しながらも、十分な強度を有する画像形成装置の
筐体を提供することを目的とする。The present invention has been made to solve the above-mentioned problems, and provides a casing of an image forming apparatus having sufficient strength while using a side plate made of sheet metal which is low in manufacturing cost. The purpose is to

【０００５】[0005]

【課題を解決するための手段】上記目的を達成するため
に本発明は、画像形成装置の枠組を構成し、内部機器を
支持する筐体において、並列して配置された前側板及び
後側板と、当該両側板の下部に接合されて両側板を支持
するベース部材と、当該両側板の間に懸架された懸架部
材とを備え、少なくとも上記両側板及び懸架部材が板金
で形成され、各側板と懸架部材とが溶接によって接合さ
れ、前記両側板は、その端部が折り曲げられて接合代が
設けられており、この接合代の折り曲げ根元近傍におい
て前記懸架部材が溶接されているものである。In order to achieve the above object, the present invention comprises a frame of an image forming apparatus, and a front plate and a rear plate arranged side by side in a casing for supporting internal equipment. A base member joined to the lower part of the both side plates to support the both side plates, and a suspension member suspended between the both side plates, at least the both side plates and the suspension member being formed of sheet metal, and each side plate and the suspension member. And are joined by welding , the edges of both side plates are bent, and the joint margin is
It is provided near the base of the bending of this joining margin.
The suspension member is welded .

【０００６】この構成によれば、板金で形成された上記
両側板及び懸架部材を溶接による接合で筐体を構成して
いるため、ビス止めによる接合の場合よりも上記両側板
及び懸架部材の接合部分における強度が増加する。これ
により、大型の装置に適用した場合にも、筐体の基体と
なる前後面の側板に撓みが生じ難い。従って、製造コス
トの安い板金製の側板を使用しながらも、十分な強度を
確保することができ、正確な画像形成が可能となる。According to this structure, since the casing is formed by welding the both side plates and the suspension member formed of sheet metal by welding, the side plates and the suspension member are joined to each other more than in the case of screw fixing. The strength at the part increases. As a result, even when applied to a large-sized device, the side plates on the front and rear surfaces, which are the base body of the housing, are unlikely to bend. Therefore, sufficient strength can be ensured and accurate image formation can be performed while using a side plate made of sheet metal which is inexpensive in manufacturing cost.

【０００７】さらに、この構成の場合、側板に設けられ
た接合代の折り曲げ根元近傍は、側板に撓みが発生した
場合であっても変形量が少なく寸法が安定しており、ま
た接合代の他の部分に比べて強度を有しているため、接
合部における強度がより増加し、筐体の変形量が減少す
る。また、例えば、ビス止めによって懸架部材を側板に
接合する場合、上記曲げ根元にビス止め用の孔を穿孔す
ることが困難であり、側板の曲げの影響でビス止め用孔
が変形し易いという問題があるが、溶接によれば、かか
る問題なく懸架部材を側板に接合することができる。 Further, in the case of this construction, the amount of deformation is small in the vicinity of the bending root of the joint margin provided on the side plate even if the side plate is bent, and the dimension is stable. Since the strength is higher than that of the portion, the strength at the joint portion is further increased and the deformation amount of the housing is reduced. Further, for example, when the suspension member is joined to the side plate by screwing, it is difficult to punch a hole for screwing at the bending root, and the screwing hole is easily deformed due to the bending of the side plate. However, by welding, the suspension member can be joined to the side plate without such a problem.

【０００８】また、前記側板と懸架部材との各接合部に
おいて、複数箇所で溶接されるようにしてもよい。[0008] Further, at each joint between the side plate and the suspension member, welding may be performed at a plurality of points.

【０００９】この構成によれば、各接合部における溶接
を複数箇所で行うので、各接合部における強度が増加す
ることにより、両側板の捻じれに対する耐久度が増加す
る。According to this structure, since the welding at each joint is performed at a plurality of points, the strength at each joint increases and the durability against twisting of both side plates increases.

【００１０】また、前記懸架部材が、前記両側板上部に
形成された接合代の側端に溶接されているようにしても
よい。 Further, the suspension member is provided above the both side plates.
Even if it is welded to the side edge of the formed joint margin
Good.

【００１１】[0011]

【発明の実施の形態】以下、本発明の一実施形態に係る
画像形成装置の筐体について図面を参照して説明する。
図１，図２は本発明に係る画像形成装置の筐体の正面側
の斜視図、図３は画像形成装置の筐体の背面側の斜視図
である。本発明に係る筐体１は、コピー機，プリンタ等
の画像形成装置の枠組を構成し、画像形成装置の外枠及
び内部に備えられる各種の電子機器類を支持するもので
あり、主に板金からなる部材を接合して組み立てられ
る。筐体１は、その土台となるベース部材２と、ベース
部材２に垂直な状態で接合され、下部がベース部材２に
支持されている前側板３と、前側板３に並列させた状態
で、ベース部材２に垂直な状態で取り付けられ、下部が
ベース部材２に支持されている後側板４とを有し、更
に、前側板３及び後側板４の上部に、両側板３，４の間
に懸架させるようにして接合された上板部材５と、前側
板３及び後側板４の上部及び略中央部に、前側板３及び
後側板４の間に懸架されるようにして接合されたステイ
（懸架部材）６１，６２，６３とを有している。BEST MODE FOR CARRYING OUT THE INVENTION A case of an image forming apparatus according to an embodiment of the present invention will be described below with reference to the drawings.
1 and 2 are perspective views of the front side of the casing of the image forming apparatus according to the present invention, and FIG. 3 is a perspective view of the rear side of the casing of the image forming apparatus. The casing 1 according to the present invention constitutes a framework of an image forming apparatus such as a copying machine or a printer, and supports an outer frame of the image forming apparatus and various electronic devices provided inside, and is mainly a sheet metal. It is assembled by joining members made of. The housing 1 is joined to a base member 2 which is a base of the housing 1 in a state perpendicular to the base member 2, and a front side plate 3 whose lower portion is supported by the base member 2 and a state where the front side plate 3 is juxtaposed to the front side plate 3. It has a rear side plate 4 which is vertically attached to the base member 2 and whose lower portion is supported by the base member 2, and is further provided on the upper side of the front side plate 3 and the rear side plate 4 between the side plates 3, 4. The upper plate member 5 joined by being suspended, and the stays joined to the upper and substantially central portions of the front side plate 3 and the rear side plate 4 so as to be suspended between the front side plate 3 and the rear side plate 4 ( Suspension members) 61, 62, 63.

【００１２】ベース部材２は、その四辺が角型の中空材
（以下、角パイプ）２１を接合して組み合わせたものか
らなる。ベース部材２の角パイプ２１で囲まれた部分に
は、内部機器の装備に適する形状（本実施形態では略中
央部に凹部２２ａを形成）とされた底板２２が角パイプ
２１に接合されている。The base member 2 is formed by joining hollow members (hereinafter, referred to as square pipes) 21 each having four sides having a square shape. In a portion of the base member 2 surrounded by the square pipe 21, a bottom plate 22 having a shape suitable for equipping internal equipment (in the present embodiment, a recess 22a is formed in a substantially central portion) is joined to the square pipe 21. .

【００１３】前側板３は、板金からなり、内部機器の装
備や操作性等のために側板本体部３１に大きく開口が設
けられている。この側板本体部３１の上部、下部及び側
部は約９０度の角度で前方向に折り曲げられて接合代３
２，３３，３４，３５が形成されている。この接合代３
２，３３，３４，３５が形成されることで側板の剛性が
強化される。The front side plate 3 is made of sheet metal, and has a large opening in the side plate body 31 for the purpose of equipment and operability of internal equipment. The upper portion, the lower portion and the side portion of the side plate body portion 31 are bent forward at an angle of about 90 degrees to form a joint margin 3
2, 33, 34 and 35 are formed. This joining fee 3
By forming 2, 33, 34, 35, the rigidity of the side plate is strengthened.

【００１４】前側板３の側部の接合代３３，３５は、そ
の下部が側板本体部３１の下端よりも下方に延び、ベー
ス部材２の角パイプ２１のほぼ下面まで延びた形状とさ
れている。側板本体部３１の下部の接合代３４は、ベー
ス部材２の角パイプ２１の上面に当接するように形成さ
れている。また、前側板３には、側板本体部３１の捻じ
れ防止等のために、水平方向に延びる補強部材３６が接
合されている。The joint margins 33 and 35 on the side portions of the front side plate 3 are shaped such that the lower portions thereof extend below the lower ends of the side plate body portions 31 and extend to substantially the lower surface of the square pipe 21 of the base member 2. . The lower joint margin 34 of the side plate body 31 is formed so as to contact the upper surface of the square pipe 21 of the base member 2. A reinforcing member 36 extending in the horizontal direction is joined to the front side plate 3 in order to prevent the side plate body 31 from being twisted.

【００１５】後側板４は、板金からなり、前側板３と同
様に、側板本体部４１の上部、下部及び側部が約９０度
の角度で後方向に折り返され、接合代４２，４３，４
４，４５が形成されている。これにより、側板の剛性強
化等が図られている。後側板４の側部の接合代４３，４
５は、その下部が側板本体部４１の下端よりも下方に延
び、ベース部材２の角パイプ２１のほぼ下面まで延びた
形状とされている。また、側板本体部４１の下部の接合
代４４は、ベース部材２の角パイプ２１の上面に当接す
るように形成されている。また、後側板４にも、側板本
体部４１の捻じれ防止等のために、水平方向に延びる補
強部材４６が接合されている。The rear side plate 4 is made of sheet metal, and like the front side plate 3, the upper portion, the lower portion and the side portion of the side plate body 41 are folded back at an angle of about 90 degrees to form the joint margins 42, 43 and 4.
4, 45 are formed. As a result, the rigidity of the side plate is enhanced. Bonding margins 43, 4 on the side of the rear side plate 4
5 has a shape in which the lower portion thereof extends below the lower end of the side plate main body portion 41 and extends almost to the lower surface of the square pipe 21 of the base member 2. Further, the lower joint margin 44 of the side plate body 41 is formed so as to abut the upper surface of the square pipe 21 of the base member 2. Further, a reinforcing member 46 extending in the horizontal direction is also joined to the rear side plate 4 in order to prevent the side plate body 41 from being twisted.

【００１６】前側板３及び後側板４の上部に接合されて
いるステイ６１，６２は約９０度に折り曲げられ、両側
板３，４の接合代３２，３３，３５，４２，４３，４５
に溶接されている。The stays 61, 62 joined to the upper portions of the front side plate 3 and the rear side plate 4 are bent at about 90 degrees, and the joint margins 32, 33, 35, 42, 43, 45 of the side plates 3, 4 are joined together.
Is welded to.

【００１７】両側板３，４の高さ方向における略中央部
に接合されているステイ６３は、その上下端部が内側に
折り曲げられて剛性強化が図られ、その長さ方向端部が
両側板３，４の接合代３５，４５に溶接されている。こ
れらステイ６１，６２，６３の接合により、前側板３及
び後側板４の捻じれ等の防止が図られている。The stay 63 joined to the substantially central portion of the side plates 3 and 4 in the height direction has its upper and lower ends bent inward to enhance the rigidity, and its longitudinal ends are the side plates. It is welded to the joint margins 35 and 45 of 3 and 4. By joining the stays 61, 62, 63, the front side plate 3 and the rear side plate 4 are prevented from being twisted.

【００１８】次に、筐体１の組み立て時における各部材
の溶接及び溶接箇所について説明する。図４は筐体１の
正面図、図５は同背面図、図６は同右側面図、図７は前
側板とステイとの接合部を示す断面図、図８は同左側面
図、図９は同上面図、図１０は同下面図、図１１（ａ）
は前側板３及び後側板４とベース部材２とを接合する前
の筐体を示す斜視図、（ｂ）は前側板３及び後側板４と
ベース部材２とを接合した筐体を示す斜視図、図１２は
後側板とベース部材との溶接部を示す部分拡大図であ
る。なお、各図においては、各部材の形状及び溶接箇所
を明確にするため、内部機器装備のために各部材に形成
される細かな孔部等は省略して図示する。Next, welding and welding points of each member when assembling the housing 1 will be described. 4 is a front view of the housing 1, FIG. 5 is a rear view of the same, FIG. 6 is a right side view of the same, FIG. 7 is a sectional view showing a joint portion between a front plate and a stay, FIG. 8 is a left side view of the same, and FIG. Is a top view of the same, FIG. 10 is a bottom view of the same, and FIG.
1B is a perspective view showing the housing before the front plate 3 and the rear plate 4 are joined to the base member 2, and FIG. 6B is a perspective view showing the housing where the front plate 3 and the rear plate 4 are joined to the base member 2. FIG. 12 is a partially enlarged view showing a welded portion between the rear side plate and the base member. In addition, in each drawing, in order to clarify the shape of each member and the welding location, the fine holes and the like formed in each member for internal equipment equipment are omitted.

【００１９】ベース部材２の角パイプ２１同士の溶接及
び溶接箇所について説明する。ベース部材２の角パイプ
２１は、図４，図５に示すように、その端部同士を溶接
ポイントＰ１，Ｐ２においてベース部材２の側方から溶
接し、更に図１０に示すように、その端部同士を角パイ
プ２１の裏側から溶接する（溶接ポイントＰ３）。角パ
イプ２１への底板２２の接合は、図１０に示すように、
角パイプ２１の裏側に底板２２の端縁部を当接させ、複
数箇所において溶接する（溶接ポイントＰ４）。さら
に、底板２２に形成されている凹部２２ａの縁部を、ベ
ース部材２の裏側から角パイプ２１に溶接し（溶接ポイ
ントＰ５）、底板２２と角パイプ２１との接合強化が図
られる。Welding of the square pipes 21 of the base member 2 and welding points will be described. The square pipe 21 of the base member 2 has its ends welded from the side of the base member 2 at welding points P1 and P2, as shown in FIGS. 4 and 5, and as shown in FIG. The parts are welded to each other from the back side of the square pipe 21 (welding point P3). The bottom plate 22 is joined to the square pipe 21 as shown in FIG.
The edge of the bottom plate 22 is brought into contact with the back side of the square pipe 21 and welded at a plurality of points (welding point P4). Further, the edge of the recess 22a formed in the bottom plate 22 is welded to the square pipe 21 from the back side of the base member 2 (welding point P5), and the joint between the bottom plate 22 and the square pipe 21 is strengthened.

【００２０】前側板３及び後側板４のベース部材２への
溶接及び溶接箇所について説明する。ベース部材２に前
側板３及び後側板４を接合するときは、図６に示すよう
に、前側板３の接合代３３及び後側板４の接合代４３の
下部を、ベース部材２の角パイプ２１の側面に溶接する
（溶接ポイントＰ６，Ｐ７）。この場合、接合代３３，
４３下部の溶接部分に孔部３３ａ，４３ａを形成してお
き、この孔部３３ａ，４３ａを通して角パイプ２１に対
して溶接するようにする。同様に、両側板３，４の接合
代３５，４５の下部も孔部３５ａ，４５ａを通して角パ
イプ２１に溶接する（溶接ポイントＰ８，Ｐ９、図８参
照）。Welding of the front side plate 3 and the rear side plate 4 to the base member 2 and welding points will be described. When joining the front side plate 3 and the rear side plate 4 to the base member 2, as shown in FIG. 6, the lower portion of the joining margin 33 of the front side plate 3 and the joining margin 43 of the rear side plate 4 is connected to the square pipe 21 of the base member 2. Are welded to the side surface (welding points P6 and P7). In this case, the joining cost 33,
Holes 33a, 43a are formed in the welded portion at the bottom of 43, and the square pipe 21 is welded through the holes 33a, 43a. Similarly, the lower portions of the joint margins 35, 45 of the side plates 3, 4 are also welded to the square pipe 21 through the holes 35a, 45a (welding points P8, P9, see FIG. 8).

【００２１】すなわち、図１１（ａ）に示すように、両
側板３，４の接合代３３，３５，４３，４５の下部が、
ベース部材２を両側方から挟持する状態とし、この状態
で接合代３３，３５，４３，４５の下部をベース部材２
の側面に溶接する（図１１（ｂ），図１２）。角パイプ
２１上に載置された状態の接合代３４，４４の縁部は、
図１１（ｂ）に示すように、その上方から底板２２に溶
接する（溶接ポイントＰ１０）。さらに、図６，図８に
示すように、前側板３及び後側板４の下端部を、筐体１
の内側からベース部材２に溶接する（溶接ポイントＰ１
１）。That is, as shown in FIG. 11A, the lower portions of the joint margins 33, 35, 43, 45 of the side plates 3, 4 are
The base member 2 is clamped from both sides, and in this state, the lower portions of the joint margins 33, 35, 43, 45 are placed in the base member 2.
Are welded to the side surface of (FIG. 11 (b), FIG. 12). The edges of the joining margins 34 and 44 placed on the square pipe 21 are
As shown in FIG. 11B, the bottom plate 22 is welded from above (welding point P10). Further, as shown in FIGS. 6 and 8, the lower end portions of the front side plate 3 and the rear side plate 4 are attached to the housing 1
Weld to the base member 2 from inside (welding point P1
1).

【００２２】補強部材３６は、図４に示すように、補強
部材３６は、接合片３６１，３６２，３６３，３６４に
おいて前側板３に溶接する（溶接ポイントＰ１２）。こ
の溶接は、前側板３に形成されている孔部を通して、前
側板３の裏側（内側）から各接合片に対して行われる。
さらに、図６，図８に示すように、補強部材３６の側面
３６５を前側板３の接合代３３，３５に溶接する（溶接
ポイントＰ１３）。この溶接は、接合代３３，３５に形
成されている孔部を通して、接合代３３，３５の外側か
ら側面３６５に対して行われる。As shown in FIG. 4, the reinforcing member 36 is welded to the front side plate 3 at the joining pieces 361, 362, 363, 364 (welding point P12). This welding is performed on each joining piece from the back side (inside) of the front side plate 3 through the hole formed in the front side plate 3.
Further, as shown in FIGS. 6 and 8, the side surface 365 of the reinforcing member 36 is welded to the joint margins 33 and 35 of the front side plate 3 (welding point P13). This welding is performed from the outside of the joint margins 33, 35 to the side surface 365 through the holes formed in the joint margins 33, 35.

【００２３】補強部材４６は、図５に示すように、接合
片４６１，４６２，４６３，４６４，４６５において後
側板４に溶接する（溶接ポイントＰ１４）。この溶接
は、後側板４に形成されている孔部を通して、後側板４
の内側（筐体１の内部側）から各接合片に対して行われ
る。さらに、図６，図８に示すように、補強部材４６の
側面４６６を後側板４の接合代４３，４５に溶接する
（溶接ポイントＰ１５）。この溶接は、接合代４３，４
５に形成されている孔部を通して、接合代４３，４５の
外側から側面４６６に対して行われる。As shown in FIG. 5, the reinforcing member 46 is welded to the rear side plate 4 at the joining pieces 461, 462, 463, 464, 465 (welding point P14). This welding passes through the holes formed in the rear side plate 4 and
Is performed on each joint piece from the inside (inside of the housing 1). Further, as shown in FIGS. 6 and 8, the side surface 466 of the reinforcing member 46 is welded to the joint margins 43 and 45 of the rear side plate 4 (welding point P15). This welding is the joint margin 43,4
Through the holes formed in No. 5, from the outside of the joint margins 43, 45 to the side surface 466.

【００２４】また、溶接箇所は特に図示しないが、上板
部材５は、前側板３及び後側板４間に懸架させるように
して、両側板３，４上部の内側に溶接する。この溶接
は、上板部材５に形成されている孔部を通して、両側板
３，４の内側（筐体１の内部側）から溶接する。Although the welding location is not particularly shown, the upper plate member 5 is suspended between the front side plate 3 and the rear side plate 4 and welded to the inside of the upper portions of the side plates 3 and 4. This welding is performed from the inside of both side plates 3 and 4 (inside the casing 1) through the hole formed in the upper plate member 5.

【００２５】ステイ６１，６２，６３の前側板３及び後
側板４への溶接及び溶接箇所について説明する。図６に
示すように、ステイ６１は、その長さ方向端部におい
て、前側板３の接合代３３及び後側板４の接合代４３に
溶接する（溶接ポイントＰ１７）。この場合、ステイ６
１の長さ方向端部付近に孔部６１ａを形成しておき、こ
の孔部６１ａを通して接合代３３，４３の外側面に溶接
する。Welding of the stays 61, 62, 63 to the front side plate 3 and the rear side plate 4 and welding points will be described. As shown in FIG. 6, the stay 61 is welded to the joint margin 33 of the front side plate 3 and the joint margin 43 of the rear side plate 4 at its longitudinal end (welding point P17). In this case, stay 6
A hole 61a is formed in the vicinity of the end in the length direction of 1 and is welded to the outer side surfaces of the joint margins 33 and 43 through the hole 61a.

【００２６】このように、板金で形成されたステイ６１
を接合代３３，４３の外側面に溶接すると、接合代３
３，４３に対してステイ６１を平行な状態として溶接す
ることになり、当該接合部におけるステイ６１と接合代
３３，４３との接触面積が大きくなる。よって、接合代
を有しない側板に、ステイを直交させた状態でビス止め
する場合に比べ、接合部分における強度が増加し、両側
板３，４の捻じれや撓みを的確に抑えることができる。
接合代３３，４３の外側面に懸架部材を取り付けるよう
にすることによって、両側板３，４（接合代３３，４
３）の周囲から、ステイ６１の接合代３３，４３に対す
る位置決めや取り付け作業を行うことができるので、ス
テイ６１の位置決めや取り付け作業を簡単に行うことが
できる。In this way, the stay 61 made of sheet metal is used.
Welded to the outer surface of the joint margin 33, 43, the joint margin 3
Since the stay 61 is welded in parallel with 3, 43, the contact area between the stay 61 and the joint margins 33, 43 at the joint is increased. Therefore, as compared with the case where the stay is orthogonally screwed to the side plate having no joint margin, the strength at the joint portion is increased, and the twisting and bending of the side plates 3 and 4 can be suppressed appropriately.
By attaching a suspension member to the outer surface of the joining margins 33, 43, both side plates 3, 4 (joining margins 33, 4
Since the stay 61 can be positioned and attached to the joining margins 33 and 43 from the periphery of 3), the stay 61 can be easily positioned and attached.

【００２７】また、当該ステイ６１の溶接は、図６，図
７に示すように、側板本体部３１，４１を折り曲げた根
元部分、すなわち、接合代３３，４３と側板本体部３
１，４１との境目となるコーナー部近傍で行う。このよ
うにすれば、両側板２，３の接合代３３，４３の折り曲
げ根元付近は、側板に撓みが発生した場合であっても変
形量が少なく、また側板の他の部分に比べて強度を有し
ているため、当該接合部における強度がより増加し、筐
体１の変形量が減少するという効果がある。Further, as shown in FIGS. 6 and 7, the welding of the stay 61 is a root portion where the side plate main body portions 31 and 41 are bent, that is, the joint margins 33 and 43 and the side plate main body portion 3 are welded.
This is performed in the vicinity of the corner portion that is the boundary between the points 1 and 41. By doing this, the amount of deformation is small in the vicinity of the bending roots of the joint margins 33, 43 of the side plates 2, 3 even when the side plate is bent, and the strength is higher than that of the other parts of the side plate. Since it has, there is an effect that the strength at the joint portion is further increased and the deformation amount of the housing 1 is reduced.

【００２８】さらに、ステイ６１は、図９に示すよう
に、前側板３及び後側板４上部の接合代３２，４２の外
側面に溶接する（溶接ポイントＰ１８）。この場合にお
いても、ステイ６１の長さ方向端部に孔部６１ｂを形成
しておき、この孔部６１ｂを通して接合代３２，４２に
溶接する。この場合も、側板本体部３１，４１を折り曲
げた根元部分近傍にステイ６１を溶接する。Further, as shown in FIG. 9, the stay 61 is welded to the outer side surfaces of the joining margins 32 and 42 above the front side plate 3 and the rear side plate 4 (welding point P18). Also in this case, a hole 61b is formed at the end of the stay 61 in the longitudinal direction, and the joining margins 32 and 42 are welded through the hole 61b. Also in this case, the stay 61 is welded to the vicinity of the root portion where the side plate body portions 31 and 41 are bent.

【００２９】さらに、接合代３２，４２との接合を強化
するために、ステイ６１の長さ方向端縁部を接合代３
２，４２に溶接する。さらに接合代３３,４３の上部の
曲げ（溶接代）が接合代３２，４２の下面にあり、接合
代３２と接合代３３、接合代４２と接合代４３を接合し
ている（溶接ポイントＰ１９）。このステイ６１の接合
代３２，４２への溶接においても、上記接合代３３，４
３への接合の場合と同様に、接合部分における強度が増
加して、両側板３，４の捻じれや撓みを的確に抑えるこ
とができ、しかも、溶接時のステイ６１の位置決めや取
り付け作業を簡単に行うことができる。Further, in order to strengthen the joining with the joining margins 32 and 42, the lengthwise end edge portion of the stay 61 is joined with the joining margin 3.
Weld to No. 2, 42. Further, there is a bend (welding allowance) at the upper part of the joining allowances 33, 43 on the lower surface of the joining allowances 32, 42, and the joining allowance 32 and the joining allowance 33 and the joining allowance 42 and the joining allowance 43 are joined (welding point P19) . Even when the stay 61 is welded to the joint margins 32 and 42, the joint margins 33 and 4 are also welded.
Similar to the case of joining to the No. 3, the strength at the joining portion is increased, so that the twisting and bending of the side plates 3 and 4 can be appropriately suppressed, and furthermore, the positioning and mounting work of the stay 61 during welding can be performed. Easy to do.

【００３０】同様に、ステイ６２は、図８に示すよう
に、その長さ方向端部を前側板３及び後側板４の接合代
３５，４５の外側面に溶接する（溶接ポイントＰ２
０）。この場合においても、ステイ６２の長さ方向端部
付近に孔部６２ａを形成しておき、この孔部６２ａを通
して接合代３５，４５の外側面に溶接する。ステイ６２
の接合代３５，４５への溶接は、側板本体部３１，４１
を折り曲げた根元部分近傍で溶接を行うようにする。Similarly, as shown in FIG. 8, the stay 62 has its longitudinal ends welded to the outer surfaces of the joint margins 35 and 45 of the front plate 3 and the rear plate 4 (welding point P2).
0). Also in this case, a hole 62a is formed near the end of the stay 62 in the longitudinal direction, and the outer surface of the joining margins 35 and 45 is welded through the hole 62a. Stay 62
The welding to the joint margins 35 and 45 is performed by the side plate body portions 31 and 41.
Welding should be performed near the root part of the bent part.

【００３１】さらに、ステイ６２は、図９に示すよう
に、前側板３及び後側板４上部の接合代３２，４２の外
側面に溶接されている（溶接ポイントＰ２１）。この場
合においても、ステイ６２の長さ方向端部（溶接する部
分）付近に孔部６２ｂを形成しておき、この孔部６２ｂ
を通して接合代３２，４２の外側面に溶接する。そし
て、接合代３２，４２の側板本体部３１，４１を折り曲
げた根元部分近傍で溶接する。また、接合代３２，４２
との接合を強化するために、ステイ６２の長さ方向端縁
部を接合代３２，４２に溶接する。さらに接合代３５，
４５の上部の曲げ（溶接代）が接合代３２，４２の下面
にあり、接合代３２と接合代３５、接合代４２と接合代
４５を接合している（溶接ポイントＰ２２）。Further, as shown in FIG. 9, the stay 62 is welded to the outer side surfaces of the joining margins 32 and 42 above the front side plate 3 and the rear side plate 4 (welding point P21). Also in this case, a hole 62b is formed near the end (welding portion) in the length direction of the stay 62, and the hole 62b is formed.
And welded to the outer surface of the joining margins 32 and 42. Then, the side plate body portions 31 and 41 of the joint margins 32 and 42 are welded in the vicinity of the bent root portions. Also, the joining cost 32, 42
In order to strengthen the joint with the, the end portion in the length direction of the stay 62 is welded to the joint margins 32 and 42. Furthermore, the joining cost 35,
Bending (welding allowance) of the upper part of 45 is on the lower surface of the joining allowances 32 and 42, and joins the joining allowance 32 and the joining allowance 35 and the joining allowance 42 and the joining allowance 45 (welding point P22).

【００３２】ステイ６３は、図８に示すように、前側板
３及び後側板４の高さ方向の略中央部において両側板
３，４間に懸架され、接合代３５，４５に平行な状態と
して、その長さ方向端部を接合代３５，４５の外側面に
溶接する。この場合も、ステイ６３の長さ方向端部付近
に孔部６３ａを形成しておき、この孔部６３ａを通して
接合代３５，４５に溶接する（溶接ポイントＰ２３）。
ステイ６３の接合代３５，４５への溶接は、側板本体部
３１，４１を折り曲げた根元部分近傍で溶接行うように
する。As shown in FIG. 8, the stay 63 is suspended between the side plates 3 and 4 at approximately the center in the height direction of the front side plate 3 and the rear side plate 4 and is in a state parallel to the joint margins 35 and 45. , The lengthwise ends thereof are welded to the outer side surfaces of the joint margins 35, 45. In this case as well, a hole 63a is formed near the end of the stay 63 in the lengthwise direction, and welded to the joint margins 35 and 45 through the hole 63a (welding point P23).
The welding of the stay 63 to the joining margins 35 and 45 is performed in the vicinity of the root portion where the side plate body portions 31 and 41 are bent.

【００３３】以上のように、本実施形態の筐体１は、板
金で形成された前側板３及び後側板４とステイ６１，６
２，６３とが溶接による接合で組み立てられているた
め、両側板３，４及びステイ６１，６２，６３の接合部
における強度が、ビス止めによる接合の場合よりも増
し、筐体１の剛性が強化される。さらに、ステイ６１，
６２，６３は、前側板３及び後側板４の接合代３３，３
５，４３，４５の曲げ根元近傍に溶接されているが、こ
の曲げ根元近傍は両側板３，４に撓み等が発生した場合
であっても変形量が少なく、また側板の他の部分に比べ
て強度を有しているため、接合部における強度がより高
くなり、筐体１の変形量が減少する。As described above, the housing 1 of this embodiment has the front side plate 3 and the rear side plate 4 formed of sheet metal and the stays 61 and 6.
Since the members 2 and 63 are assembled by welding, the strength of the joints between the side plates 3 and 4 and the stays 61, 62 and 63 is higher than that in the case of joining by screws, and the rigidity of the housing 1 is increased. To be strengthened. In addition, stay 61,
62 and 63 are joint margins 33 and 3 of the front side plate 3 and the rear side plate 4.
Although welded near the bending roots of 5, 43, 45, the amount of deformation is small in the vicinity of the bending roots even when the side plates 3 and 4 are bent, and compared with other parts of the side plates. Since it has strength, the strength at the joint becomes higher and the amount of deformation of the housing 1 decreases.

【００３４】また、本筐体１によれば、ビス止めによっ
てステイを側板に接合する場合のように、側板の曲げ根
元にビス止め用の孔を形成することが困難である、側板
の曲げの影響でビス止め用孔が変形し易いという問題を
生じることなく、ステイ６１，６２，６３を両側板３，
４に簡単に接合することができる。Further, according to the present housing 1, it is difficult to form a hole for screw fixing at the bending root of the side plate as in the case where the stay is joined to the side plate by screw fixing. The stays 61, 62, and 63 are attached to both side plates 3 without causing a problem that the screw fixing holes are easily deformed due to the influence.
4 can be easily joined.

【００３５】また、前側板３及び後側板４の接合代に対
してステイ６１，６２，６３を平行にあてがって溶接
し、ステイ６１，６２，６３と接合代３２，３３，３５
との接触面積を大きくしているので、接合部における強
度の増加を図ることができ、この点からも、両側板３，
４の捻じれや撓みを原因とする筐体１の変形を効果的に
防止することができる。Further, the stays 61, 62 and 63 are applied in parallel to the joint margins of the front side plate 3 and the rear side plate 4 and welded, and the stays 61, 62 and 63 and the joint margins 32, 33 and 35 are welded.
Since the contact area with the two is large, it is possible to increase the strength at the joint portion.
It is possible to effectively prevent the housing 1 from being deformed due to the twisting or bending of the housing 4.

【００３６】なお、本発明は上記実施の形態の構成に限
られず種々の変形が可能である。例えば、上記実施の形
態では、前側板３及び後側板４の接合代は、前側板３及
び後側板４の上端部、下端部、及び両側端部に形成され
ているが、接合代はこれら全ての端部に形成されていな
くてもよく、例えば、上端部や一方の側端部のみに形成
されているものであってもよい。この場合、ステイは、
前側板３及び後側板４に形成されている接合代に溶接さ
れる。The present invention is not limited to the configuration of the above embodiment, and various modifications can be made. For example, in the above embodiment, the joint margin of the front side plate 3 and the rear side plate 4 is formed at the upper end portion, the lower end portion, and the both side end portions of the front side plate 3 and the rear side plate 4, but the joint margin is all of these. Does not have to be formed at the end portion, and may be formed only at the upper end portion or one side end portion, for example. In this case, the stay is
It is welded to the joint margin formed on the front side plate 3 and the rear side plate 4.

【００３７】また、上記実施形態では、各部材の接合部
における溶接箇所の数を特定していないが、各接合部に
おいて複数箇所で溶接を行うようにすれば、溶接部にお
ける強度が増加し、側板の捻じれに対する耐久度が増す
ので、一点で溶接する場合よりも筐体の強度が向上す
る。また、各部材の溶接方法は特に限定されないが、ア
ーク溶接，スポット溶接等が好ましい。Further, in the above embodiment, the number of welding points at the joint of each member is not specified, but if welding is performed at a plurality of points at each joint, the strength at the weld increases, Since the durability against the twist of the side plate is increased, the strength of the housing is improved as compared with the case of welding at one point. The method of welding each member is not particularly limited, but arc welding, spot welding, etc. are preferable.

【００３８】[0038]

【発明の効果】以上のように本発明によれば、板金で形
成されたフレーム及び懸架部材を溶接で接合して筐体を
構成しているため、ビス止めによる接合の場合よりも上
記両フレームと懸架部材との接合部分における強度が増
加する。これにより、大型の装置に適用した場合にも、
筐体の基体となる前背面のフレームにたわみ等が生じ難
い。従って、製造コストの安い板金製のフレームを使用
しながらも、十分な強度を有する筐体となり、正確な画
像形成が可能となる。As described above, according to the present invention, the frame and the suspension member formed of the sheet metal are joined by welding to form the housing, so that both frames are more than the case of joining by the screw fixing. The strength at the joint between the suspension member and the suspension member increases. As a result, even when applied to a large device,
Bending is less likely to occur in the front and rear frames that are the base of the housing. Therefore, while using a frame made of sheet metal which is low in manufacturing cost, the casing has sufficient strength, and accurate image formation is possible.

【００３９】特に、フレームを折り曲げて接合代を設
け、接合代の折り曲げ根元近傍で懸架部材を溶接した場
合には、接合代の折り曲げ根元近傍は、フレームにたわ
みが発生した場合であっても変形量が少なく寸法が安定
しており、またフレームの他の部分に比べて強度を有し
ているため、接合部における強度がより増加し、筐体の
変形量が減少するという効果がある。当該溶接によれ
ば、ビス止めによって懸架部材をフレームに接合する場
合に発生する問題、すなわち、（１）上記曲げ根元にビ
ス止め用の孔を穿孔することが困難である、（２）フレ
ームの曲げの影響でビス止め用孔が変形し易い、といっ
た問題を生じることなく懸架部材をフレームに接合する
ことができる。Particularly, when the frame is bent to provide a joining margin and the suspension member is welded near the bending root of the joining margin, the vicinity of the bending root of the joining margin is deformed even when the frame is bent. Since the amount is small, the dimensions are stable, and the strength is higher than that of other portions of the frame, the strength at the joint portion is further increased, and the deformation amount of the housing is reduced. According to the welding, a problem that occurs when the suspension member is joined to the frame by screwing, that is, (1) it is difficult to drill a screwing hole at the bending root, (2) The suspension member can be joined to the frame without causing the problem that the screwing holes are easily deformed due to the influence of bending.

【００４０】また、フレームと懸架部材との各接合部に
おいて、複数箇所で溶接するようにすれば、各溶接部に
おける強度が増加し、側板の捻じれに対する耐久度が増
すので、一点で溶接する場合よりも筐体の強度が向上す
る。If welding is performed at a plurality of points at each joint between the frame and the suspension member, the strength at each weld increases and the durability against twisting of the side plate increases, so welding is performed at one point. The strength of the housing is improved as compared with the case.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明に係る画像形成装置の筐体の正面斜視図
である。FIG. 1 is a front perspective view of a housing of an image forming apparatus according to the present invention.

【図２】上記画像形成装置の筐体の正面斜視図である。FIG. 2 is a front perspective view of a housing of the image forming apparatus.

【図３】上記筐体の背面斜視図である。FIG. 3 is a rear perspective view of the housing.

【図４】上記筐体の正面図である。FIG. 4 is a front view of the housing.

【図５】上記筐体の背面図である。FIG. 5 is a rear view of the housing.

【図６】上記筐体の右側面図である。FIG. 6 is a right side view of the housing.

【図７】上記筐体の前側板とステイとの接合部を示す断
面図である。FIG. 7 is a cross-sectional view showing a joint between a front side plate of the housing and a stay.

【図８】上記筐体の左側面図である。FIG. 8 is a left side view of the housing.

【図９】上記筐体の上面図である。FIG. 9 is a top view of the housing.

【図１０】上記筐体の下面図である。FIG. 10 is a bottom view of the housing.

【図１１】（ａ）は前側板及び後側板とベース部材とを
接合する前の筐体を示す斜視図、（ｂ）は前側板及び後
側板とベース部材とを接合した筐体を示す斜視図であ
る。FIG. 11A is a perspective view showing a housing before the front plate and the rear plate are joined to the base member, and FIG. 11B is a perspective view showing the housing where the front plate and the rear plate are joined to the base member. It is a figure.

【図１２】後側板とベース部材との溶接部を示す部分拡
大図である。FIG. 12 is a partial enlarged view showing a welded portion between a rear side plate and a base member.

【符号の説明】[Explanation of symbols]

１ 筐体 ２ ベース部材 ２１ 角パイプ ３ 前側板 ３１ 側板本体部 ３２，３３，３４，３５ 接合代 ４ 後側板 ４１ 側板本体部 ４２，４３，４４，４５ 接合代 ６１，６２，６３ ステイ（懸架部材） 1 case 2 Base member 21 square pipe 3 front plate 31 Side plate body 32, 33, 34, 35 Joint allowance 4 Rear plate 41 Side plate body 42,43,44,45 Joint allowance 61, 62, 63 stay (suspension member)

フロントページの続き (72)発明者 西 正幸 大阪市中央区玉造１丁目２番28号 京セ ラミタ株式会社内 (56)参考文献 特開 平11−165448（ＪＰ，Ａ) 特開 平５−307280（ＪＰ，Ａ) 特開2000−269669（ＪＰ，Ａ) 特開 平11−135956（ＪＰ，Ａ) 特開2001−255804（ＪＰ，Ａ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) G03G 15/00 550 G03G 21/16 - 21/18 B41J 29/00 - 29/70 H05K 5/00 - 5/06 Front page continuation (72) Inventor Masayuki Nishi 1-2-2, Tamatsukuri, Chuo-ku, Osaka Kyocera Mita Co., Ltd. (56) Reference JP-A-11-165448 (JP, A) JP-A-5-307280 (JP, A) JP 2000-269669 (JP, A) JP 11-135956 (JP, A) JP 2001-255804 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) G03G 15/00 550 G03G 21/16-21/18 B41J 29/00-29/70 H05K 5/00-5/06

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】画像形成装置の枠組を構成し、内部機器を
支持する筐体において、 並列して配置された前側板及び後側板と、当該両側板の
下部に接合されて両側板を支持するベース部材と、当該
両側板の間に懸架された懸架部材とを備え、 少なくとも上記両側板及び懸架部材が板金で形成され、
各側板と懸架部材とが溶接によって接合され、 前記両側板は、その端部が折り曲げられて接合代が設け
られており、この接合代の折り曲げ根元近傍において前
記懸架部材が溶接 されていることを特徴とする画像形成
装置の筐体。1. In a casing which constitutes a framework of an image forming apparatus and which supports internal devices, front and rear plates arranged in parallel and joined to the lower parts of the both side plates to support both side plates. A base member and a suspension member suspended between the both side plates, wherein at least the both side plates and the suspension member are formed of sheet metal,
Each side plate and the suspension member are joined by welding, and the both side plates are bent at their ends to provide a joining margin.
It is set in the vicinity of the bending root of this joining margin.
The casing of the image forming apparatus, wherein the suspension member is welded . 【請求項２】前記側板と懸架部材との各接合部は、複数
箇所で溶接されていることを特徴とする請求項１に記載
の画像形成装置の筐体。Wherein each junction between the side plate and the suspension member, the housing of the image forming apparatus according to claim 1, characterized in that it is welded at a plurality of positions. 【請求項３】前記懸架部材が、前記両側板上部に形成さ
れた接合代の側端に溶接されていることを特徴とする請
求項１又は請求項２に記載の画像形成装置の筐体。 3. The suspension member is formed on the upper portions of both side plates.
A contract characterized in that it is welded to the side edge of the welded joint margin.
The housing of the image forming apparatus according to claim 1 or claim 2.