JPH074895Y2 - Synthetic resin bearing holder - Google Patents
Synthetic resin bearing holderInfo
- Publication number
- JPH074895Y2 JPH074895Y2 JP3816390U JP3816390U JPH074895Y2 JP H074895 Y2 JPH074895 Y2 JP H074895Y2 JP 3816390 U JP3816390 U JP 3816390U JP 3816390 U JP3816390 U JP 3816390U JP H074895 Y2 JPH074895 Y2 JP H074895Y2
- Authority
- JP
- Japan
- Prior art keywords
- bearing holder
- bearing
- synthetic resin
- holder
- cylindrical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920003002 synthetic resin Polymers 0.000 title claims description 13
- 239000000057 synthetic resin Substances 0.000 title claims description 13
- 238000001746 injection moulding Methods 0.000 claims description 2
- 229920005989 resin Polymers 0.000 description 12
- 239000011347 resin Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 9
- 239000000835 fiber Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 241000270722 Crocodylidae Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- LNNWVNGFPYWNQE-GMIGKAJZSA-N desomorphine Chemical compound C1C2=CC=C(O)C3=C2[C@]24CCN(C)[C@H]1[C@@H]2CCC[C@@H]4O3 LNNWVNGFPYWNQE-GMIGKAJZSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） この考案は、合成樹脂製の軸受ホルダーに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a bearing holder made of synthetic resin.
（従来の技術） 例えばビデオデッキに用いられるキャプスタンは、その
両端部を軸受で回転自在に支持される。そして、この軸
受は、その中間部にテープが進入する切欠き部を形成さ
れた軸受ホルダーの両端部に保持される。従来、キャプ
スタン用モータに設けられる軸受ホルダーは、アルミダ
イキャスト製であって、圧入される軸受同士の同軸度を
出すためにサイジング加工を施していた。キャスティン
グによる軸受ホルダーは、コスト高であるため、これを
合成樹脂で形成することが試みられている。(Prior Art) For example, a capstan used for a video deck is rotatably supported at both ends by bearings. Then, this bearing is held at both ends of a bearing holder having a cutout portion formed in its middle portion through which the tape enters. Conventionally, the bearing holder provided in the capstan motor is made of aluminum die-cast, and has been subjected to sizing in order to obtain coaxiality between the press-fitted bearings. Since the bearing holder by casting is expensive, it has been attempted to form it by a synthetic resin.
（考案が解決しようとする課題） 軸受ホルダーを合成樹脂の射出成形で形成しようとする
と、円筒状の軸受ホルダーは、円周方向において上述し
た切欠き部とこれに対向する部分との間に成形後の収縮
代の差が生じ、ホルダーがその長手方向に反ってしま
う。すなわち、切欠き部のエッジ部分の固化が他の部分
の固化よりも速いために、切欠き部とこれに対向する円
筒部分の収縮バランスに差が出て反ってしまうのであ
る。従って、かかる軸受ホルダーは、その両端に保持さ
れる軸受同士の同軸度が出なくなる、という問題があ
る。繊維で強化した合成樹脂材料を用いると、反りの度
合いが小さくなるも完全にはなくならない。(Problems to be solved by the invention) When a bearing holder is formed by injection molding of synthetic resin, a cylindrical bearing holder is formed between the above-mentioned cutout portion and a portion facing the cutout portion in the circumferential direction. A difference in shrinkage allowance occurs later, and the holder warps in the longitudinal direction. That is, since the solidification of the edge portion of the cutout portion is faster than the solidification of the other portions, the contraction balance between the cutout portion and the cylindrical portion facing the cutout portion is different and warps. Therefore, such a bearing holder has a problem that the coaxiality of the bearings held at both ends is not obtained. When a fiber-reinforced synthetic resin material is used, the degree of warpage is reduced, but it is not completely eliminated.
そこで、本考案の目的は、反りの発生を回避した合成樹
脂製軸受ホルダーの提供にある。Therefore, an object of the present invention is to provide a synthetic resin bearing holder that avoids warpage.
（課題を解決するための手段） 本考案の軸受ホルダーは、円筒状の軸受ホルダーを繊維
で強化した合成樹脂で形成し、切欠き部側であって該切
欠き部を避けた端部に、ゲート切断面を設けたことを特
徴とする。(Means for Solving the Problem) A bearing holder of the present invention is formed by forming a cylindrical bearing holder with a synthetic resin reinforced with fibers, and at the end portion on the cutout side, avoiding the cutout portion, It is characterized in that a gate cutting surface is provided.
（作用） 切欠き部を避けた端部の上記ゲートから射出された樹脂
は、混入された繊維を、切欠き部に対向する円筒部分で
一方向に配列させながら充填されてホルダーに成形され
る。(Function) The resin injected from the gate at the end avoiding the notch is filled with the mixed fibers while arranging the mixed fibers in one direction in the cylindrical portion facing the notch and forming the holder. .
（実施例） 以下、図示の実施例に基づいて本考案を詳細に説明す
る。(Embodiment) Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
第１図乃至第６図において、符号１はガラス繊維やカー
ボン繊維を混入して強化された合成樹脂製の軸受ホルダ
ーを示している。軸受ホルダー１は、円筒状の円筒部２
と、この円筒部を例えばキャプスタン用モーター（図示
せず）に取り付けるためのフランジ部３とからなってい
る。円筒部２の、上端部には図示されないキャプスタン
の自由端を支持する軸受部材を嵌合される第１軸受保持
部４が、下端部にはキャプスタンの基端を支持する軸受
部材を嵌合される第２軸受保持部５がそれぞれ形成され
ている。円筒部２には、上記各軸受部4,5の中間部に、
円筒の一部を切り欠いた形状の切欠き部６が形成されて
いる。従って、円筒部２は、その上下端に軸受保持部を
有し、その中間部を部分円筒状に形成されていることに
なる。1 to 6, reference numeral 1 indicates a bearing holder made of synthetic resin reinforced by mixing glass fiber or carbon fiber. The bearing holder 1 has a cylindrical cylindrical portion 2
And a flange portion 3 for attaching the cylindrical portion to, for example, a capstan motor (not shown). A first bearing holding portion 4 into which a bearing member (not shown) that supports a free end of a capstan is fitted to an upper end of the cylindrical portion 2, and a bearing member that supports a proximal end of the capstan is fitted to a lower end thereof. The 2nd bearing holding part 5 combined is formed, respectively. The cylindrical portion 2 has an intermediate portion between the bearings 4 and 5,
A notch 6 having a shape obtained by notching a part of a cylinder is formed. Therefore, the cylindrical portion 2 has bearing holding portions at the upper and lower ends thereof, and the intermediate portion thereof is formed in a partially cylindrical shape.
図示の実施例においては、円筒部２の円周方向におい
て、切欠き部６の反対側の周面に、軸方向に延びる複数
条のエッジを有する溝部７が形成されている。この溝部
７は、切欠き部６の上端部6aから下端部6bまでの長さに
形成されれば足りるものであり、相隣るエッジ部がリブ
で接続されていても良い。また、図示の実施例におい
て、切欠き部６の軸方向の側縁8,8は、部分円柱状に形
成されている。フランジ部３には、該ホルダー１をモー
ターに固定する貫通孔９と、該ホルダーに図示しないプ
レートを取付けるためのタッピング孔10がそれぞれ形成
されている。In the illustrated embodiment, in the circumferential direction of the cylindrical portion 2, a groove portion 7 having a plurality of edges extending in the axial direction is formed on the circumferential surface opposite to the cutout portion 6. The groove portion 7 is sufficient if it is formed to have a length from the upper end portion 6a to the lower end portion 6b of the cutout portion 6, and adjacent edge portions may be connected by ribs. Further, in the illustrated embodiment, the side edges 8 in the axial direction of the cutout portion 6 are formed in a partially cylindrical shape. The flange portion 3 is formed with a through hole 9 for fixing the holder 1 to a motor and a tapping hole 10 for attaching a plate (not shown) to the holder.
また、軸受ホルダー１には、第１図に示すように、切欠
き部６を避けた端部であって切欠き部側（部分円筒部の
反対側）のフランジ部３にゲート切断面11が設けられて
いる。この切断面11には、後述する軸受ホルダー１を成
形した後にゲート11Aを切断した痕跡である。Further, in the bearing holder 1, as shown in FIG. 1, a gate cutting surface 11 is provided on the flange portion 3 on the side of the cutout portion (the side opposite to the partial cylindrical portion) which is the end portion avoiding the cutout portion 6. It is provided. The cut surface 11 is a trace of cutting the gate 11A after molding the bearing holder 1 described later.
次に、以上のような構造を有する軸受ホルダー１の形成
方法の一例を説明しておく。ガラス繊維やカーボン繊維
を含有させた合成樹脂材料をゲート部（11A）から成形
型内に射出する。このとき、円筒部２の貫通孔に相当す
る部分にはピンが挿通されている。型内に射出された樹
脂材料は、先ずフランジ部３を満たしたのち、円筒部２
の下部2bに流入する。下部2bを満たした樹脂材料は、図
示されないピンを回り込んで、円筒部の部分円筒部2aの
下部で合流したのち矢印ａ（第２図参照）で示すように
上部へ向けて流れる。ピンを回り込んだ樹脂の流れが合
流する部分すなわちウエルドライン発生部においては、
樹脂の流れが上部へ向かう一定方向となり、強化用充填
材の配向が強くなり、繊維が樹脂の流れに沿うように配
列させられる。従って、射出された樹脂が冷却され固化
されるとき、部分円筒部分で配列されている繊維がつっ
かい棒の機能を果たすことになり、樹脂の流れ方向の収
縮はこれに直角な方向より小さくなる。よって、軸受ホ
ルダー１には、反りが発生しないので、第１軸受保持部
４と第２軸受部５とは、同一軸線上に位置することにな
り、軸受ホルダーの同軸度が出ることになる。Next, an example of a method of forming the bearing holder 1 having the above structure will be described. A synthetic resin material containing glass fiber or carbon fiber is injected from the gate portion (11A) into the molding die. At this time, the pin is inserted in the portion corresponding to the through hole of the cylindrical portion 2. The resin material injected into the mold first fills the flange portion 3 and then the cylindrical portion 2
Flows into the lower part 2b of. The resin material filling the lower portion 2b wraps around a pin (not shown), merges at the lower portion of the cylindrical portion 2a of the cylindrical portion, and then flows upward as shown by an arrow a (see FIG. 2). At the weld line generation part where the flow of resin around the pin joins,
The resin flow is in a fixed direction toward the top, the orientation of the reinforcing filler is strong, and the fibers are arranged along the resin flow. Therefore, when the injected resin is cooled and solidified, the fibers arranged in the partial cylindrical portion function as a bulky rod, and the shrinkage in the resin flow direction becomes smaller than the direction perpendicular to this. . Therefore, since the bearing holder 1 does not warp, the first bearing holding portion 4 and the second bearing portion 5 are located on the same axis, and the coaxiality of the bearing holder is obtained.
図示の実施例は、樹脂材料を注入するゲート部が、フラ
ンジ部３の方の端部に設けられているが、第１図におい
て、上端部側にゲート部が設けられても良い。この場
合、ゲート部は、注入される樹脂材料が部分円筒部を流
通するとき、ウエルドラインを発生するようにその設置
位置が選択されること勿論である。ところで、図示の実
施例は、第１軸受保持部４が貫通している。この部分が
貫通していない形式の軸受ホルダーがあるが、この場合
には、第１軸受保持部に嵌合される軸受部材は、第２軸
受保持部５側から挿入される。かかる形式のホルダーに
あっては、切欠き部がわの上端から樹脂材料を注入して
もウエルドラインが発生しないので、下端がわにゲート
部を設ける必要がある。In the illustrated embodiment, the gate portion for injecting the resin material is provided at the end portion toward the flange portion 3, but in FIG. 1, the gate portion may be provided at the upper end portion side. In this case, it goes without saying that the installation position of the gate portion is selected so that a weld line is generated when the injected resin material flows through the partial cylindrical portion. By the way, in the illustrated embodiment, the first bearing holding portion 4 penetrates. There is a bearing holder of a type in which this portion does not penetrate, but in this case, the bearing member fitted into the first bearing holding portion is inserted from the second bearing holding portion 5 side. In the holder of this type, since the weld line does not occur even when the resin material is injected from the upper end of the notch, it is necessary to provide the gate at the lower end.
また、図示の実施例は、切欠き部６の側縁８をＲ形状に
形成しているので、エッジ効果による突っ張りが発生し
難い。しかし、側縁８をＲ形状にしない場合には、この
側縁８のエッジ部が早期に固化して反りの原因になる
が、上述したように、部分円筒部分で配列させられてい
る繊維がつっかい棒の機能を有するので、ホルダー全体
としての反りの発生が抑止される。更に、実施例におい
ては、切欠き部６と反対側の円筒部に溝部７を設けてい
るので、この部分には早期に固化するエッジ効果が発生
する。この溝部７のエッジ効果は、切欠き部６の側縁８
に発生するエッジ効果を相殺するため、軸受ホルダーの
長手方向の反り発生を回避する。溝部７と側縁８のエッ
ジ効果が相殺されるということは、繊維で強化しなくて
も反りの発生が抑えられる。よって、特にゲート部の設
置位置を選ばなくても良いことになる。但し、繊維で強
化する場合、ゲート部の設置位置を考慮すると上述した
ような効果が得られる。図示の実施例においては、ゲー
ト切断面11の配設位置に加えて、切欠き部の側縁８の断
面形状をＲ形状にし、溝部７を形成したので切欠き部を
有する合成樹脂製品に反りが発生しない。円筒部の切欠
き部６と反対位置に形成する溝部７は、エッジ効果を得
るために設けるのであるが、このエッジ効果を得る形状
としては、第７図に示すようなものが考えられる。同図
（ａ），（ｂ）に示すエッジ部70,71は円筒部２の直径
がやや大きくなるが、同図（ｃ），（ｄ）に示すエッジ
部72,73は第３図に示す例と同じスペース内に収まる。
各エッジ部の稜線の数は、切欠き部の側縁８を断面Ｒ形
状にするか或いは断面角形形状にするかに応じて適宜選
択される。Further, in the illustrated embodiment, the side edge 8 of the cutout portion 6 is formed in an R shape, so that the bracing due to the edge effect is unlikely to occur. However, when the side edge 8 is not formed into the R shape, the edge portion of the side edge 8 solidifies early and causes warpage, but as described above, the fibers arranged in the partial cylindrical portion are Since it has the function of a hard rod, the occurrence of warpage of the holder as a whole is suppressed. Further, in the embodiment, since the groove portion 7 is provided in the cylindrical portion on the side opposite to the cutout portion 6, an edge effect that solidifies early occurs in this portion. The edge effect of the groove portion 7 is that the side edge 8 of the cutout portion 6 is
Since the edge effect that occurs in the bearing holder is canceled, the occurrence of warpage in the longitudinal direction of the bearing holder is avoided. The fact that the edge effects of the groove portion 7 and the side edge 8 are canceled each other suppresses the occurrence of warpage without reinforcing the fiber. Therefore, it is not necessary to particularly select the installation position of the gate portion. However, in the case of reinforcing with fibers, the above-described effects can be obtained when the installation position of the gate portion is taken into consideration. In the illustrated embodiment, in addition to the position where the gate cut surface 11 is provided, the side edge 8 of the cutout portion has an R-shaped cross section and the groove portion 7 is formed, so that the synthetic resin product having the cutout portion is warped. Does not occur. The groove portion 7 formed at the position opposite to the cutout portion 6 of the cylindrical portion is provided to obtain the edge effect. As a shape for obtaining this edge effect, a shape as shown in FIG. 7 can be considered. In the edge portions 70 and 71 shown in FIGS. 7A and 7B, the diameter of the cylindrical portion 2 is slightly larger, but the edge portions 72 and 73 shown in FIGS. 3C and 3D are shown in FIG. Fits in the same space as the example.
The number of ridge lines of each edge portion is appropriately selected depending on whether the side edge 8 of the cutout portion has an R-shaped cross section or a rectangular cross-sectional shape.
（考案の効果） 以上のように、本考案によれば切欠き部がわにゲート切
断面を設けたので、型に注入された樹脂材料の繊維が切
欠き部と反対側の部分円筒部で一方向に配列させられる
から、軸受ホルダーの冷却時の収縮代に差がなくなっ
て、該ホルダーの両端の軸受保持部に高い同軸度が得ら
れる。(Effects of the Invention) As described above, according to the present invention, since the notch portion is provided with the gate cutting surface in the crocodile, the fiber of the resin material injected into the mold is formed in the partial cylindrical portion on the side opposite to the notch portion. Since the bearing holders are arranged in one direction, there is no difference in the shrinkage allowance when the bearing holder is cooled, and a high degree of coaxiality can be obtained in the bearing holding portions at both ends of the holder.
第１図は本考案の一実施例を示す合成樹脂製の軸受ホル
ダーを示す斜視図、第２図は同上の縦断面図、第３図は
同上のＡ−Ａ線断面図、第４図は同上の平面図、第５図
は同上の底面図、第６図は同上のＢ−Ｂ線断面図、第７
図は部分円筒部に設けられるエッジ部の異なる形状を示
す断面図である。 １……軸受ホルダー,2……円筒部,3……フランジ部,4,5
……軸受保持部,6……切欠き部,7……溝部,8……側縁
部,11……ゲート切断面,11A……ゲート部。FIG. 1 is a perspective view showing a bearing holder made of synthetic resin showing an embodiment of the present invention, FIG. 2 is a vertical sectional view of the same, FIG. 3 is a sectional view taken along line AA of the same, and FIG. FIG. 5 is a plan view of the above, FIG. 5 is a bottom view of the same as above, and FIG.
The drawings are cross-sectional views showing different shapes of the edge portions provided in the partial cylindrical portion. 1 …… Bearing holder, 2 …… Cylinder part, 3 …… Flange part, 4,5
...... Bearing holding part, 6 ...... notch part, 7 ...... groove part, 8 ...... side edge part, 11 ...... gate cut surface, 11A ...... gate part.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｌ 31:24 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B29L 31:24
Claims (1)
る軸受保持部を形成され、その中間部の円筒部の一部に
切欠き部を形成された円筒状の軸受ホルダーにおいて、 繊維で強化された合成樹脂を射出成形して形成されてい
て、上記切欠き部側であって該切欠き部を避けた端部
に、ゲート切断面を設けたことを特徴とする合成樹脂製
軸受ホルダー。Claim: What is claimed is: 1. A cylindrical bearing holder having bearing holding portions formed at both ends thereof, into which a bearing member is fitted, and a cutout portion formed at a part of a cylindrical portion at an intermediate portion of the bearing holder. A bearing holder made of synthetic resin, characterized in that it is formed by injection molding a reinforced synthetic resin, and a gate cut surface is provided at the end portion on the side of the cutout portion and avoiding the cutout portion. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3816390U JPH074895Y2 (en) | 1990-04-10 | 1990-04-10 | Synthetic resin bearing holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3816390U JPH074895Y2 (en) | 1990-04-10 | 1990-04-10 | Synthetic resin bearing holder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03129423U JPH03129423U (en) | 1991-12-26 |
| JPH074895Y2 true JPH074895Y2 (en) | 1995-02-08 |
Family
ID=31545922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3816390U Expired - Lifetime JPH074895Y2 (en) | 1990-04-10 | 1990-04-10 | Synthetic resin bearing holder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH074895Y2 (en) |
-
1990
- 1990-04-10 JP JP3816390U patent/JPH074895Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03129423U (en) | 1991-12-26 |
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