JPH05157Y2 - - Google Patents
Info
- Publication number
- JPH05157Y2 JPH05157Y2 JP1385088U JP1385088U JPH05157Y2 JP H05157 Y2 JPH05157 Y2 JP H05157Y2 JP 1385088 U JP1385088 U JP 1385088U JP 1385088 U JP1385088 U JP 1385088U JP H05157 Y2 JPH05157 Y2 JP H05157Y2
- Authority
- JP
- Japan
- Prior art keywords
- thread
- thread guide
- hole
- guide hole
- diameter
- 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
- 238000009958 sewing Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 description 7
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
この考案は、糸のくせ、ねじれ等を矯正するた
めにミシンの糸まきと糸調子器との間の糸経路に
配設される糸案内に関するものである。[Detailed description of the invention] [Field of industrial application] This invention is a thread guide installed in the thread path between the thread winder and the thread tension device of a sewing machine to correct curls, twists, etc. of the thread. It is related to.
［従来の技術と問題点］
第３図は従来の糸案内を示す図で、１は板状の
糸案内本体で、上下方向に貫通形成される複数の
糸案内孔２を有している。このような糸案内は一
般にミシンヘツド前面の糸まきと糸調子器との間
に配設されて糸のくせ、よじれ等を矯正する作用
をなしている。すなわち、第３図ａにおいて、上
方の糸まき（不図示）から導かれた糸３は、糸案
内孔２に上側開口部から挿通され下側開口部から
抜けて糸案内本体１の外縁をまわつて再び隣接す
る糸案内孔２の上側開口部に挿通され、下側開口
部から抜けて糸調子器（不図示）へ導かれ、この
間の糸のくせ、よじれ等が矯正されるようになつ
ている。[Prior Art and Problems] FIG. 3 is a diagram showing a conventional thread guide, in which reference numeral 1 denotes a plate-shaped thread guide body, which has a plurality of thread guide holes 2 formed vertically through the thread guide body. Such a thread guide is generally disposed between a thread winder and a thread tension device at the front of the sewing machine head, and serves to correct curls, kinks, etc. of the thread. That is, in FIG. 3a, the thread 3 guided from the upper thread winder (not shown) is inserted into the thread guide hole 2 from the upper opening, exits from the lower opening, and goes around the outer edge of the thread guide body 1. The thread is then inserted again into the upper opening of the adjacent thread guide hole 2, passes through the lower opening, and is guided to a thread tension device (not shown), during which curls, kinks, etc. of the thread are corrected. There is.
このように、糸案内にあつては、糸が各所に接
して滑動していくため、表面は、滑らかさ（低摩
擦性）と一定の硬度（耐摩耗性）が要求される。
このような点から、糸案内の材質としては、セラ
ミツク材が最適であるがコストが高いため現在で
は、糸案内本体をプレス成形し、案内孔にセラミ
ツク材を用いることが一般的になつている。 In this way, in the case of thread guide, since the thread slides in contact with various parts, the surface is required to have smoothness (low friction) and a certain hardness (wear resistance).
From this point of view, ceramic material is the most suitable material for the thread guide, but because of its high cost, it is now common practice to press-form the thread guide body and use ceramic material for the guide hole. .
しかしながら、このような場合においても、板
金成形による糸案内本体の仕上げの繁雑さ、セラ
ミツク材と金属材の複合構造に起因するコスト高
といつた問題が依然として残つているのである。 However, even in such a case, problems still remain, such as the complexity of finishing the thread guide body by sheet metal molding and the high cost due to the composite structure of ceramic and metal materials.
また、加工性の点からデザインの自由度を充分
に得られないという欠点もある。 Furthermore, there is also the drawback that a sufficient degree of freedom in design cannot be obtained from the viewpoint of processability.
ところで、上述の、すなわち、糸まきと糸調子
器との間に配設される糸案内にあつては、糸の張
力が、糸調子器と縫機構との間に配設されるいわ
ゆる第２糸案内におけるほどは強くない。 By the way, in the above-mentioned thread guide disposed between the thread winder and the thread tension device, the tension of the thread is controlled by the so-called second thread guide disposed between the thread tension device and the sewing mechanism. It is not as strong as in the thread guide.
このため、耐摩耗性は、若干劣つても原価コス
トが安く、デザイン上の自由度も充分に得られる
樹脂材が、糸案内の原材料として着目されること
になる。 For this reason, resin materials are attracting attention as raw materials for thread guides because they have low cost and a sufficient degree of freedom in design, even if their abrasion resistance is slightly inferior.
しかしながら、樹脂成形によつて、上述の、す
なわち、第３図に示すような形状の糸案内を得よ
うとすると、金型構造上の新たな問題が生じる。
すなわち、成形後に糸案内孔を開口する総削型で
はコスト高になるために、この糸案内孔を一体に
成形する必要がある。この糸案内孔は糸のねじれ
を矯正可能に糸をしごいて糸のより取りをするた
めに糸の太さを考慮して２mm以下の小径にした
い。第４図は、この糸案内孔１０を一方の母型１
１に打ち込んだ一本の入れ子ピン１２により成形
するところを示す。このピン１２は小径であつ
て、かつ長いものとなるので強度上のうえから、
糸案内の成形時に他方の母型１３との接触部Ａの
面圧が不足して、バリ１４が比較的大きく生じや
すい。第５図は、ピン１５，１６を上下に分割し
て両方の母型１７，１８に打ち込むことにより上
記一本のピンよりも短くしたものを示す。しか
し、ピン１５，１６を中央で接触させると、図に
示すようにピン１５，１６が位置ズレを生じた場
合に、パーテイング部１９にパーテング段差１９
ａが生じて、小径Ｒがさらに中央部で細くR′な
り、糸張力の変化を生じ、縫いむらや糸切れ等が
発生して縫い品質が低下するという問題が発生す
る。 However, when trying to obtain a thread guide having the shape described above, that is, as shown in FIG. 3, by resin molding, a new problem arises regarding the structure of the mold.
That is, since the total machining die in which the thread guide hole is opened after molding increases the cost, it is necessary to mold the thread guide hole integrally. This thread guide hole should have a small diameter of 2 mm or less, considering the thickness of the thread, in order to straighten the twist of the thread and squeeze the thread to untwist it. FIG. 4 shows this thread guide hole 10 on one of the mother molds 1
1 is shown in FIG. This pin 12 has a small diameter and is long, so from the viewpoint of strength,
During molding of the thread guide, the surface pressure of the contact portion A with the other matrix 13 is insufficient, and burrs 14 tend to be relatively large. FIG. 5 shows a structure in which the pins 15 and 16 are divided into upper and lower parts and driven into both master molds 17 and 18, thereby making the pins shorter than the single pin described above. However, if the pins 15 and 16 are brought into contact at the center, if the pins 15 and 16 are misaligned as shown in the figure, the parting part 19 will have a parting step 19.
a occurs, and the small diameter R becomes even thinner at the center, R', which causes a change in thread tension, causing problems such as uneven stitching and thread breakage, resulting in poor stitching quality.
この考案は上記問題点を解決するため、成形し
た状態において仕上げをせずに適正にして滑らか
な案内孔をもつ糸案内を得ることを目的とする。 In order to solve the above-mentioned problems, this invention aims to obtain a thread guide having a proper and smooth guide hole without finishing in the molded state.
［問題点を解決するための手段］
この考案は、上下方向に貫通形成される複数の
糸案内孔を有して、糸まきと糸調子器との間の糸
経路に配設される糸案内において、前記糸案内孔
における上下両開口部の孔径のうち一方を糸のよ
り取りが可能な糸案内の孔径で形成し、他方を前
記一方の孔径よりも大径に形成することを特徴と
するミシンにおける糸案内を提供するものであ
る。[Means for Solving the Problems] This invention provides a thread guide which has a plurality of thread guide holes formed through the thread guide in the vertical direction and is disposed in the thread path between the thread winder and the thread tension device. In this method, one of the diameters of the upper and lower openings of the thread guide hole is formed with a diameter of a thread guide that allows twisting of the thread, and the other is formed with a diameter larger than the diameter of the one hole. It provides thread guidance in sewing machines.
［考案の実施例］
図面にもとづいてこの考案の実施例を説明す
る。従来例と同一箇所には同一符号を付し重複説
明は省略する。[Embodiment of the invention] An embodiment of the invention will be described based on the drawings. The same parts as in the conventional example are denoted by the same reference numerals, and redundant explanation will be omitted.
第１図および第２図はこの考案の一実施例を示
す図で、第１図は、糸案内の一部切欠斜視図、第
２ａ図は同断面図、第２ｂ図は金型構成断面図で
ある。 Figures 1 and 2 are views showing an embodiment of this invention, where Figure 1 is a partially cutaway perspective view of the thread guide, Figure 2a is a sectional view of the same, and Figure 2b is a sectional view of the mold structure. It is.
この実施例において、糸案内本体１は樹脂成形
品で、上下方向に貫通形成された複数の糸案内孔
２の開口端には断面ほぼ半円形状の縁部２ａが周
設されている。そして、各糸案内孔の上下開口部
は第２図に示すように、その孔径を異なるものに
形成してある。すなわち、図で左側の糸案内孔２
の下側の開口部の径を糸案内に適するほぼ２mmの
小径とし、上側の開口部の径は下側より大径にな
つている。そして、右側に隣接する糸案内孔２
は、前述とは逆に、上側開口部を糸案内に適する
小径に下側開口部を大径に形成してあり、糸案内
本体に糸案内孔を３以上形成する場合も上述のよ
うな関係で形成していく。 In this embodiment, the thread guide main body 1 is a resin molded product, and an edge 2a having a substantially semicircular cross section is provided around the open end of a plurality of thread guide holes 2 formed through the thread guide in the vertical direction. The upper and lower openings of each thread guide hole are formed to have different hole diameters, as shown in FIG. In other words, the thread guide hole 2 on the left side in the figure
The lower opening has a small diameter of approximately 2 mm, which is suitable for thread guidance, and the upper opening has a larger diameter than the lower opening. Then, the thread guide hole 2 adjacent to the right side
Contrary to the above, the upper opening is formed with a small diameter suitable for thread guidance, and the lower opening is formed with a large diameter, and the above-mentioned relationship also applies when three or more thread guide holes are formed in the thread guide body. It will be formed by
また、図において、４は、糸案内を金型で成形
した場合に生じるパーテイングラインである。 Further, in the figure, 4 is a parting line that occurs when the thread guide is molded with a mold.
このパーテイングライン４は糸案内本体の中央
部分に形成されている。 This parting line 4 is formed at the center of the thread guide body.
第２ｂ図は、この実施例を形成可能とする金型
の断面図であり、母型６，７に対して糸案内に適
する小径のピン８と、このピン８よりも大径に形
成したピン９とがそれぞれ打ち込まれている。 FIG. 2b is a sectional view of a mold that can form this embodiment, and shows a pin 8 with a small diameter suitable for guiding the thread with respect to the master molds 6 and 7, and a pin formed with a larger diameter than this pin 8. 9 is typed into each.
各ピン８，９は両母型６，７の中間部で同心円
状に接触しており、特に小径ピン８は糸案内孔２
の全長よりも短く母型６，７から突出しているた
め、糸案内の成形時に、この接触面１０の面圧を
高くすることができ、パーテイングライン４にお
いてバリの発生を防止することが可能になり、成
形後の仕上げを不用にする。また、各ピン８，９
が同心円状から多少のズレが生じた場合も、４ａ
のパーテイング段差部分のエツジにより、例えば
第５図のR′のように、成形された糸案内孔２は
小径ピン８よりも小径となることはない。 The pins 8 and 9 are in concentric contact with each other at the middle part of both the master molds 6 and 7, and the small diameter pin 8 is particularly connected to the thread guide hole 2.
Because it protrudes from the matrix 6, 7 shorter than the entire length of the thread guide, it is possible to increase the surface pressure on this contact surface 10 when forming the thread guide, and it is possible to prevent the occurrence of burrs at the parting line 4. This eliminates the need for finishing after molding. Also, each pin 8, 9
Even if there is some deviation from the concentric shape, 4a
Due to the edge of the parting stepped portion, the formed thread guide hole 2 does not have a smaller diameter than the small diameter pin 8, for example, as indicated by R' in FIG.
このようにして成形された糸案内に対して、上
方の糸まきから導かれた糸３は、糸案内孔２へ上
側開口部から挿通され、下側開口部へ抜け、糸案
内本体１の前端縁を下から上にまわつて隣接する
糸案内孔２の上側開口部に挿通される。そして、
その下側開口部から抜けた糸３は図示しない糸調
子器に導かれる。 With respect to the thread guide formed in this way, the thread 3 guided from the upper thread winder is inserted into the thread guide hole 2 from the upper opening, exits to the lower opening, and passes through the front end of the thread guide body 1. The thread is passed around the edge from bottom to top and inserted into the upper opening of the adjacent thread guide hole 2. and,
The thread 3 coming out of the lower opening is guided to a thread tension device (not shown).
次に、この実施例の作用を第２図をもとにして
説明する。左上方の糸まき（不図示）から糸案内
孔２の上側開口部に入つた糸３は、下側開口部の
小径部で糸のより取りがされ、その周縁に形成さ
れた縁部２ａに接して右隣りの糸案内孔２の上側
の小径開口部にいたり再度糸のより取りが行われ
ながら孔内に案内され下側開口部から抜け所定箇
所に導かれる。そして、各糸案内孔２において、
孔内における糸３は、たとえ中央のパーテイング
ライン４に接触しても、例えばピン１２（第４
図）に比べてピン８，９は短く形成されているた
めに成形時に高い面圧がかかるのでバリが極めて
小さく、糸を傷つけることがない。 Next, the operation of this embodiment will be explained based on FIG. 2. The thread 3 that enters the upper opening of the thread guide hole 2 from the upper left thread winder (not shown) is untwisted at the small diameter part of the lower opening, and is untwisted at the edge 2a formed around the periphery. The thread is placed in the upper small-diameter opening of the thread guide hole 2 adjacent to the right, and is guided into the hole while being untwisted again, and then exits from the lower opening and is guided to a predetermined location. Then, in each thread guide hole 2,
Even if the thread 3 in the hole comes into contact with the central parting line 4, for example, the pin 12 (the fourth
Since the pins 8 and 9 are shorter than those shown in the figure, high surface pressure is applied during molding, so burrs are extremely small and do not damage the thread.
［考案の効果］
この考案は、以上述べた構成作用により糸案内
を樹脂成形化しうるので、原価コストが低廉で、
しかも外観デザインの優れた糸案内を得ることが
できる。[Effects of the invention] With this invention, the thread guide can be molded in resin due to the above-mentioned structural action, so the cost is low.
Furthermore, a thread guide with an excellent external design can be obtained.
第１図は、この考案に係る樹脂成形で得た糸案
内の一部切欠斜視図、第２ａ図は同上−線断
面図、第２ｂ図は金型構成図、第３図ａは従来の
糸案内の一部切欠斜視図、同図ｂは同上Ｂ−Ｂ線
断面図である。第４図、第５図は従来の金型構造
を示す断面図である。
１……糸案内本体、２……糸案内孔、２ａ……
縁部。
Fig. 1 is a partially cutaway perspective view of a thread guide obtained by resin molding according to this invention, Fig. 2a is a sectional view taken along the same line as above, Fig. 2b is a mold configuration diagram, and Fig. 3a is a conventional thread guide. A partially cutaway perspective view of the guide, and FIG. FIGS. 4 and 5 are cross-sectional views showing the conventional mold structure. 1...Thread guide body, 2...Thread guide hole, 2a...
Edge.
Claims (1)
して、糸まきと糸調子器との間の糸経路に配設さ
れる糸案内において、 前記糸案内孔における上下両開口部の孔径のう
ち一方を糸のより取りが可能な糸案内の孔径で形
成し、他方を前記一方の孔径よりも大径に形成す
ることを特徴とするミシンにおける糸案内。[Scope of Claim for Utility Model Registration] A thread guide provided in a thread path between a thread winder and a thread tension device, the thread guide having a plurality of thread guide holes extending vertically through the thread guide hole. A thread guide for a sewing machine, characterized in that one of the hole diameters of both the upper and lower openings is formed with a thread guide hole diameter that allows thread to be twisted, and the other hole is formed with a larger diameter than the one hole diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1385088U JPH05157Y2 (en) | 1988-02-04 | 1988-02-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1385088U JPH05157Y2 (en) | 1988-02-04 | 1988-02-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01118779U JPH01118779U (en) | 1989-08-10 |
| JPH05157Y2 true JPH05157Y2 (en) | 1993-01-05 |
Family
ID=31224517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1385088U Expired - Lifetime JPH05157Y2 (en) | 1988-02-04 | 1988-02-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05157Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9526549B2 (en) | 2012-01-16 | 2016-12-27 | Carbofix Orthopedics Ltd. | Bone screw with insert |
-
1988
- 1988-02-04 JP JP1385088U patent/JPH05157Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9526549B2 (en) | 2012-01-16 | 2016-12-27 | Carbofix Orthopedics Ltd. | Bone screw with insert |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01118779U (en) | 1989-08-10 |
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