JP3611113B2

JP3611113B2 - Member mounting structure

Info

Publication number: JP3611113B2
Application number: JP2001188936A
Authority: JP
Inventors: 幸平村山
Original assignee: Nippon Seiki Co Ltd
Current assignee: Nippon Seiki Co Ltd
Priority date: 2001-06-22
Filing date: 2001-06-22
Publication date: 2005-01-19
Anticipated expiration: 2021-06-22
Also published as: JP2003004012A

Description

【０００１】
【発明の属する技術分野】
本発明は、射出成形によって形成される合成樹脂製の成形部材と、この成形部材と取付固定される取付部材との取付構造に関するものである。
【０００２】
【従来の技術】
自動二輪車や建設機械用の表示装置を例に説明する。図５において、１は速度計や燃料計、あるいは各種ウォーニング表示部などがケース２内に収納されている表示器である。この表示器１はフロントパネル３の前壁４に設けた装着穴５に前側から挿入され、ケース２の裏面側に固定した断面Ｌ字形の金属製の取付フレーム６を介してフロントパネル３の側壁７にビス８を用いて取付固定されている。そして、このフロントパネル３が自動二輪車や建設機械などの車体側に取り付けられるようになっている。
【０００３】
フロントパネル３は、例えば黒色の合成樹脂からなり、射出成形によって略箱形に形成されるものである。このフロントパネル３の側壁７には、取付フレーム６を取り付けるための取付孔９が設けてある。この取付孔９はビス８のねじ部１０が挿通される丸孔としてある。また、側壁７の外側箇所には座孔１１が取付孔９と同心に設けてあり、ビス８に組み込まれた平座金１２が挿入されるようになっている。また、側壁７の内側の取付孔９周囲には側壁７と一体に受座１４が設けてある。この受座１４は、例えば側壁７が曲面であると取付部１３と側壁７とが密接しなく、取付部１３と側壁７との間に隙間が生じる。すると、ビス８をねじ締め後に合成樹脂製の側壁７にクラックや変形などが生じやすいため、側壁７側に受座１４を設けて取付部１３と密接させた状態でねじ締めしようとするものである。
【０００４】
取付フレーム６の取付部１３には、フロントパネル３に設けてある取付孔９に対応する箇所にビス８のねじ部１０が螺合する雌ねじ（図示せず）が設けてある。そして、フロントパネル３と取付フレーム６との取り付けは、平座金１２付ビス８のねじ部１０を取付孔９に挿通してねじ締めすることにより、ビス８のねじ部１０が取付部１３に形成した雌ねじに螺合してフロントパネル３の側壁７と取付部１３とが取付固定される。
【０００５】
【発明が解決しようとする課題】
しかしながら、前記従来例においてはフロントパネル３が射出成形による成形品であり、射出成形する際の射出成形金型（コア型，キャビ型）の型閉め及び型開き方向（開閉方向）が図５においては上下方向となる。ところが、側壁７の内側に受座１４が突き出しているために、コア型側には入れ子（駒）を使わなければ射出成形後の型開きができない。そのため金型構造が複雑となり、従って、コストアップとなってしまう。なお、側壁７の内側に受座１４を設けないで、例えば、受座１４に相当する金属製の座を別個に製作して、それを取付部１３の雌ねじ周囲に溶接するという方法もあるが、部品点数や加工工数などが増え、さらにコストアップとなってしまう。また、図６に示す様にビス８上方の側壁７箇所を肉厚に形成して、型開き可能な形状の受座１４Ａを設けても良いが、肉厚箇所にヒケが発生してしまう。
【０００６】
本発明はこの様な点に鑑みなされたもので、合成樹脂製の成形部材と、この成形部材と取付固定される取付部材との取付構造をコスト的に安く提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明は前記目的を達成するため、射出成形によって形成される合成樹脂製の成形部材を所定の取付部材に取付固定する取付構造であって、前記成形部材に取付孔を設けるとともに、この取付孔の周辺に取付孔の軸心と直交する方向で、かつ前記成形部材を射出成形する際の射出成形金型の開閉方向に沿った複数の凸部を設け、この凸部上に前記取付部材を配置させた状態で両部材を取付固定したものである。
【０００８】
また、前記凸部が少なくとも前記取付孔を挟んで設けられているものである。
【０００９】
また、前記凸部を前記取付孔の近傍に設けたものである。
【００１０】
【発明の実施の形態】
本発明を従来と同様に自動二輪車に用いられる表示装置を実施形態とし、合成樹脂製の成形部材をフロントパネル，取付部材を取付フレームとして説明する。また、従来例と同一もしくは相当箇所については同一符号を付し、その詳細説明は省略する。
【００１１】
図１〜図４は本発明の実施形態を示し、図２は図１におけるＡ方向からの矢視図であり、図３は図２におけるＢ−Ｂ断面図である。フロントパネル３は従来例と同様に合成樹脂からなり、射出成形によって形成されるものである。このフロントパネル３の側壁７には、取付フレーム６を取り付けるためのビス８のねじ部１０が挿通される取付孔９と、ビス８に組み込まれた平座金１２が挿入される座孔１１が取付孔９と同心に設けてある。この場合、取付孔９はビス８のねじ部１０が挿通する貫通孔からなり、その貫通軸線（軸心）Ｌは後述するコア型とキャビ型の開閉方向に対して直交する方向に延びている。
【００１２】
また、側壁７内側の取付孔９の周辺、本実施形態では取付孔９を挟んで取付孔９の両側にリブ状の凸部１５が設けてある。この両凸部１５の幅（内法寸法）Ｗは取付孔９の径よりもわずかに大きく形成してある（凸部１５が取付孔９に近接している）。また、凸部１５はフロントパネル３を射出成形する際の射出成形金型、すなわち、コア型Ｘとキャビ型Ｙの開閉方向（図４において上下方向）に沿って延びるリブ状に設けてあり、この場合、後述する取付フレーム６の取付部１３に対応する凸部１５の表面（先端面）は、取付孔９の貫通軸線Ｌに対して直交する方向に延びている平面として形成されている。なお、フロントパネル３の側壁７に設けられる取付孔９および座孔１１は、スライドコアＺを使う（従来も同様である）。
【００１３】
取付フレーム６は、従来例と同様に金属製であり、取付フレーム６の取付部１３には、フロントパネル３の側壁７に設けてある取付孔９に対応する箇所にビス８のねじ部１０が螺合する雌ねじ（図示せず）が設けてある。また、取付部１３は凸部１５の表面に沿ってこれと平行に延びている。なお、射出成形金型の開閉方向に沿って設けられる凸部１５および凸部１５の表面に沿う取付部１３は、射出成形金型の開閉方向と完全に平行である必要はなく、金型の開きが可能であれば傾斜していても良い。すなわち、図１において凸部１５（及び取付部１３）は側壁７に沿って（側壁７と平行に）斜めに設けても良い。
【００１４】
次に、本実施形態におけるフロントパネル３と取付フレーム６との取付方法について説明する。フロントパネル３の前壁４に設けてある装着穴５に表示器１を挿入した後、ケース２の裏面に取付フレーム６を適宜手段で固定する。すると、取付フレーム６の取付部１３が側壁７に設けた凸部１５上に配置された状態となる。その後、平座金１２付のビス８を側壁７に設けた取付孔９に挿通してねじ締めすることにより、ビス８のねじ部１０が取付部１３に形成した雌ねじに螺合してフロントパネル３の側壁７と取付フレーム６の取付部１３とが取付固定される。
【００１５】
この様に、フロントパネル３の側壁７の内側に凸部１５が突設してあっても、この凸部１５がフロントパネル３を射出成形する際の射出成形金型の開閉方向に沿ったものであるため、フロントパネル３を射出成形後、コア型Ｘからフロントパネル３を取り外す（コア型Ｘを開く）際に、従来例の様にコア型Ｘ側に入れ子を使う必要もなく、金型構造が単純となる。従って、コスト的に安いフロントパネル３と取付フレーム６との取付構造を提供できる。
【００１６】
また、凸部１５を取付孔９を挟んで両側に設けたため、ビス８の両側に凸部１５が位置することにより（凸部１５がビス８の片側に偏っていないため）、ねじ締め後の取付部１３と側壁７との取付状態が安定している。また、凸部１５を取付孔９に近接させて形成したため、平座金１２と取付部１３との間に２箇所の壁（凸部１５の一部）が存在し、ビス８を締め付けた際、平座金１２が当接している側壁７箇所が窪んだりすることがなく、両部材が確実に取付固定される。なお、凸部１５の幅Ｗは本実施形態のように取付孔９の径よりもわずかに大きく形成しても良いし、一致させても良いものであり、すなわち、前述した如く、ビス８を締め付けた際に、側壁７箇所が窪んだりすることがないように取付孔９の近傍に凸部１５を設ければ良い。
【００１７】
なお、本実施形態においては取付フレーム６の取付部１３に直に雌ねじを形成したが、フロントパネル３の側壁７に設けた取付孔９と同様な貫通孔を設け、ビス８のねじ部１０を挿通させた後、ねじ部１０の先端側にナットを装着して固定するようにしてもよい。また、ビス８は平座金１２付を用いたが、平座金１２は無しでも良い。フロントパネル３と取付フレーム６との取り付けにビス８を用いたがビス８に限定するものではない。また、成形部材をフロントパネル３とし、取付部材を取付フレーム６としたが、これらに限定するものではないし、取付部材は例えば樹脂製でも良い。
【００１８】
【発明の効果】
請求項１に記載の効果としては、合成樹脂製の成形部材と、この成形部材と取付固定される取付部材との取付構造をコスト的に安く提供できる。
【００１９】
請求項２に記載の効果としては、請求項１の効果に加えて、両部材の取付状態が安定する。
【００２０】
請求項３に記載の効果としては、前記効果に加えて、両部材が確実に取付固定される。
【図面の簡単な説明】
【図１】本発明の部材の取付構造を適用した表示装置の断面図。
【図２】同フロントパネルを示す部分矢視図（図１におけるＡ矢視）。
【図３】同フロントパネルを示す部分断面図（図２におけるＢ−Ｂ断面）。
【図４】同金型構造を説明する概略射出成形金型図。
【図５】従来の部材の取付構造を適用した表示装置の断面図。
【図６】従来の部材の取付構造を示す部分断面図。
【符号の説明】
３フロントパネル（成形部材）
６取付フレーム（取付部材）
７側壁
８ビス
９取付孔
１３取付部
１５凸部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin molded member formed by injection molding and an attachment structure of the molded member and an attachment member attached and fixed.
[0002]
[Prior art]
A display device for a motorcycle or construction machine will be described as an example. In FIG. 5, reference numeral 1 denotes a display in which a speedometer, a fuel gauge, various warning display units, and the like are housed in the case 2. This indicator 1 is inserted from the front side into a mounting hole 5 provided on the front wall 4 of the front panel 3 and is fixed to the back side of the case 2 through a metal mounting frame 6 having an L-shaped cross section. 7 is fixed with screws 8. And this front panel 3 is attached to the vehicle body side, such as a motorcycle and a construction machine.
[0003]
The front panel 3 is made of, for example, black synthetic resin and is formed in a substantially box shape by injection molding. A mounting hole 9 for mounting the mounting frame 6 is provided in the side wall 7 of the front panel 3. The mounting hole 9 is a round hole through which the screw portion 10 of the screw 8 is inserted. Further, a seat hole 11 is provided concentrically with the mounting hole 9 on the outer side of the side wall 7, and a flat washer 12 incorporated in the screw 8 is inserted. A receiving seat 14 is provided integrally with the side wall 7 around the mounting hole 9 inside the side wall 7. For example, if the side wall 7 is a curved surface, the mounting portion 13 and the side wall 7 are not in close contact with each other, and a gap is generated between the mounting portion 13 and the side wall 7. Then, since the plastic resin side wall 7 is likely to be cracked or deformed after the screw 8 is screwed, the seat 14 is provided on the side wall 7 side and is to be screwed in a state of being in close contact with the mounting portion 13. is there.
[0004]
The mounting portion 13 of the mounting frame 6 is provided with a female screw (not shown) in which the screw portion 10 of the screw 8 is screwed at a position corresponding to the mounting hole 9 provided in the front panel 3. The front panel 3 and the attachment frame 6 are attached by inserting the screw portion 10 of the screw 8 with the flat washer 12 into the attachment hole 9 and tightening the screw portion 10 so that the screw portion 10 of the screw 8 is formed on the attachment portion 13. The side wall 7 and the attachment portion 13 of the front panel 3 are attached and fixed by screwing into the female screw.
[0005]
[Problems to be solved by the invention]
However, in the above-mentioned conventional example, the front panel 3 is a molded product by injection molding, and the mold closing and mold opening directions (opening and closing directions) of the injection mold (core mold, mold mold) at the time of injection molding are shown in FIG. Is up and down. However, since the seat 14 protrudes inside the side wall 7, the mold cannot be opened after the injection molding unless a nest is used on the core mold side. This complicates the mold structure and therefore increases the cost. In addition, without providing the receiving seat 14 inside the side wall 7, for example, there is a method in which a metal seat corresponding to the receiving seat 14 is separately manufactured and welded around the female screw of the mounting portion 13. The number of parts and the number of processing steps increase, which further increases costs. In addition, as shown in FIG. 6, the side wall 7 above the screw 8 may be formed thick to provide a seat 14A having a shape that can be opened, but sinking occurs in the thick portion.
[0006]
This invention is made | formed in view of such a point, and it aims at providing the attachment structure of the molding member made from a synthetic resin, and this attachment member and the attachment member attached and fixed at low cost.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a mounting structure for mounting and fixing a synthetic resin molding member formed by injection molding to a predetermined mounting member. The mounting member has a mounting hole, and the mounting hole A plurality of convex portions are provided in the direction perpendicular to the axis of the mounting hole and along the opening and closing direction of the injection mold when the molding member is injection-molded, and the mounting member is disposed on the convex portion. Both members are attached and fixed in a state where they are arranged.
[0008]
Moreover, the said convex part is provided on both sides of the said attachment hole at least.
[0009]
Moreover, the said convex part is provided in the vicinity of the said attachment hole.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described by using a display device used in a motorcycle as in the conventional embodiment as an embodiment, a synthetic resin molded member as a front panel, and an attachment member as an attachment frame. Further, the same or corresponding parts as those in the conventional example are denoted by the same reference numerals, and detailed description thereof is omitted.
[0011]
1 to 4 show an embodiment of the present invention, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. The front panel 3 is made of a synthetic resin as in the conventional example, and is formed by injection molding. An attachment hole 9 through which a screw portion 10 of a screw 8 for attaching the attachment frame 6 is inserted and a seat hole 11 into which a flat washer 12 incorporated in the screw 8 is inserted are attached to the side wall 7 of the front panel 3. It is provided concentrically with the hole 9. In this case, the mounting hole 9 is a through-hole through which the screw portion 10 of the screw 8 is inserted, and the through-axis line (axial center) L extends in a direction perpendicular to the opening / closing direction of a core type and a cabinet type as will be described later. .
[0012]
Further, rib-shaped convex portions 15 are provided around the mounting hole 9 inside the side wall 7, in this embodiment, on both sides of the mounting hole 9 with the mounting hole 9 interposed therebetween. The width (internal dimension) W of both the convex portions 15 is slightly larger than the diameter of the mounting hole 9 (the convex portion 15 is close to the mounting hole 9). Further, the convex portion 15 is provided in an injection mold when the front panel 3 is injection-molded, that is, in a rib shape extending along the opening / closing direction (vertical direction in FIG. 4) of the core mold X and the cavity mold Y, In this case, the surface (tip surface) of the convex portion 15 corresponding to the mounting portion 13 of the mounting frame 6 described later is formed as a plane extending in a direction orthogonal to the through-axis line L of the mounting hole 9. Note that the mounting hole 9 and the seat hole 11 provided in the side wall 7 of the front panel 3 use the slide core Z (the same applies to the conventional case).
[0013]
The mounting frame 6 is made of metal as in the conventional example, and the screw portion 10 of the screw 8 is provided on the mounting portion 13 of the mounting frame 6 at a position corresponding to the mounting hole 9 provided in the side wall 7 of the front panel 3. A female screw (not shown) to be screwed is provided. Further, the attachment portion 13 extends along the surface of the convex portion 15 in parallel therewith. Note that the projection 15 provided along the opening / closing direction of the injection mold and the attachment portion 13 along the surface of the projection 15 do not have to be completely parallel to the opening / closing direction of the injection mold. If opening is possible, it may be inclined. That is, in FIG. 1, the convex portion 15 (and the attachment portion 13) may be provided obliquely along the side wall 7 (in parallel with the side wall 7).
[0014]
Next, the attachment method of the front panel 3 and the attachment frame 6 in this embodiment is demonstrated. After the indicator 1 is inserted into the mounting hole 5 provided in the front wall 4 of the front panel 3, the mounting frame 6 is fixed to the back surface of the case 2 by appropriate means. Then, the mounting portion 13 of the mounting frame 6 is placed on the convex portion 15 provided on the side wall 7. After that, the screw 8 with the flat washer 12 is inserted into the mounting hole 9 provided in the side wall 7 and screwed, whereby the screw portion 10 of the screw 8 is screwed into the female screw formed in the mounting portion 13 and the front panel 3. The side wall 7 and the mounting portion 13 of the mounting frame 6 are fixedly mounted.
[0015]
Thus, even if the convex part 15 protrudes inside the side wall 7 of the front panel 3, the convex part 15 is along the opening and closing direction of the injection mold when the front panel 3 is injection molded. Therefore, when removing the front panel 3 from the core mold X after opening the front panel 3 (opening the core mold X), there is no need to use a nesting on the core mold X side as in the conventional example. The structure is simple. Therefore, it is possible to provide an attachment structure between the front panel 3 and the attachment frame 6 that is inexpensive.
[0016]
Further, since the convex portions 15 are provided on both sides of the mounting hole 9, the convex portions 15 are located on both sides of the screw 8 (because the convex portion 15 is not biased to one side of the screw 8). The attachment state of the attachment part 13 and the side wall 7 is stable. In addition, since the convex portion 15 is formed close to the attachment hole 9, there are two walls (a part of the convex portion 15) between the flat washer 12 and the attachment portion 13, and when the screw 8 is tightened, The seven portions of the side wall with which the flat washer 12 abuts are not depressed, and both members are securely attached and fixed. It should be noted that the width W of the convex portion 15 may be formed slightly larger than the diameter of the mounting hole 9 as in the present embodiment, or may be made to coincide with each other. What is necessary is just to provide the convex part 15 in the vicinity of the attachment hole 9 so that 7 side walls may not be depressed when it clamps.
[0017]
In this embodiment, the internal thread is formed directly on the mounting portion 13 of the mounting frame 6. However, a through hole similar to the mounting hole 9 provided on the side wall 7 of the front panel 3 is provided, and the screw portion 10 of the screw 8 is attached. After the insertion, a nut may be attached to the distal end side of the screw portion 10 and fixed. Further, although the screw 8 with the flat washer 12 is used, the flat washer 12 may be omitted. The screws 8 are used for mounting the front panel 3 and the mounting frame 6, but are not limited to the screws 8. Further, although the molded member is the front panel 3 and the mounting member is the mounting frame 6, the present invention is not limited to this, and the mounting member may be made of resin, for example.
[0018]
【The invention's effect】
As an effect described in claim 1, it is possible to provide a mounting structure of a synthetic resin molded member and a mounting member attached and fixed to the molded member at low cost.
[0019]
As an effect described in claim 2, in addition to the effect of claim 1, the mounting state of both members is stabilized.
[0020]
As an effect described in claim 3, in addition to the effect, both the members are securely mounted and fixed.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a display device to which a member mounting structure of the present invention is applied.
FIG. 2 is a partial arrow view showing the front panel (indicated by an arrow A in FIG. 1).
FIG. 3 is a partial cross-sectional view showing the same front panel (cross section BB in FIG. 2).
FIG. 4 is a schematic injection mold diagram illustrating the mold structure.
FIG. 5 is a cross-sectional view of a display device to which a conventional member mounting structure is applied.
FIG. 6 is a partial cross-sectional view showing a conventional member mounting structure.
[Explanation of symbols]
3 Front panel (molded material)
6 Mounting frame (mounting member)
7 Side wall 8 Screw 9 Mounting hole 13 Mounting portion 15 Convex portion

Claims

A mounting structure for mounting and fixing a molding member made of synthetic resin formed by injection molding to a predetermined mounting member, wherein the molding member is provided with a mounting hole, and the periphery of the mounting hole is orthogonal to the axis of the mounting hole A plurality of convex portions are provided along the opening and closing direction of the injection mold when the molding member is injection-molded, and both the members are fixedly mounted with the mounting member disposed on the convex portion. A member mounting structure characterized by the above.

The member mounting structure according to claim 1, wherein the convex portion is provided with at least the mounting hole interposed therebetween.

The member mounting structure according to claim 2, wherein the convex portion is provided in the vicinity of the mounting hole.