JP4236948B2

JP4236948B2 - Sewing machine feeder

Info

Publication number: JP4236948B2
Application number: JP2003030820A
Authority: JP
Inventors: 隆志嘉数田
Original assignee: ペガサスミシン製造株式会社
Priority date: 2003-02-07
Filing date: 2003-02-07
Publication date: 2009-03-11
Anticipated expiration: 2023-02-07
Also published as: TWI325905B; KR20040073954A; CN1519411A; CN100558967C; JP2004236945A; TW200427891A

Description

【０００１】
【産業上の利用分野】
本発明は、環縫いミシン等において長円運動をなす送り歯により生地を送るミシンの送り装置に関するものであって、詳しくは、送り歯が取着される送り台を通じて潤滑油が漏洩することを防止するためのシール機構を備えたミシンの送り装置に関するものである。
【０００２】
【従来技術】
従来のミシンの送り装置では、送り台に挿通されたシール体で油漏れを防止していた（例えば、特許文献１参照。）。送り台は公知の上下駆動機構および前後駆動機構に連結され、送り台の端部はミシンフレーム前面の窓部（切り欠き）に固定された隔壁板（支え台）より突出する。送り台の端部には送り歯が取着され、シール体は上下のスライド可能に隔壁板の後側に配置されている。なお、シール体は弾性押さえ板で隔壁板に付勢されている。
【０００３】
このような構成を備えた従来のミシンの送り装置によると、ミシン駆動時に送り台は生地送り方向に沿って上下前後に長円運動を行い、一般に公知の給油機構でミシンフレーム内に潤滑油が供給されることとなる。この時、シール体は送り台の長円運動に伴って上下に摺動しながら送り台に付着する潤滑油を切り、隔壁板の送り台用貫通穴から外部に潤滑油が漏洩しないようにしていた。
【０００４】
【特許文献１】
実開昭４９−１３９０５５号公報（第１頁、１−２図）
【０００５】
【発明が解決しようとする課題】
ところが、従来のミシンの送り装置では、シール体が隔壁板に弾性押さえ板で付勢されながら上下に摺動する構成となっているため、ミシンの駆動を高速にするとシール体の耐久性に乏しいという問題があった。また、この時、シール体が送り台の上下動に追従できずに変形すると、シール体と送り台との摺接面に隙間を生じて潤滑油を十分切れない恐れがある。これを避けるために弾性押さえ板の付勢を弱めると、送り台の前後動に伴い隔壁板とシール体との間に隙間が生じてその隙間から潤滑油が侵入する。そしてこの隙間から侵入した潤滑油が隔壁板とシール体との間を通じて隔壁板の送り台用貫通穴に到達すると、ミシンフレーム外部に油漏れが発生する恐れがあった。
【０００６】
本発明は上記実状に鑑みてなされたものであり、送り台に挿通されるシール体の耐久性を高めると共に、隔壁板の送り台用貫通穴を通じて潤滑油が外部に漏洩することを防止できるミシンの送り装置を提供することを目的としている。
【０００７】
本発明は、上記目的を達成するために、ミシンフレーム前面の窓部より部分的に突出する送り台と、送り台に連結された上下駆動機構および前後駆動機構と、前記窓部に設けられ送り台の運動を案内する送り台ガイドと、前記窓部に設けられる隔壁板と、隔壁板の後側に上下動可能に配置されるとともに送り台に挿通される第１シール体とを備え、上下駆動機構と前後駆動機構との協働時に第１シール体が隔壁板側に付勢され、送り台の端部に取着された送り歯がミシンの縫製部で長円軌道に沿って運動するミシンの送り装置において、
前記隔壁板は前記送り台における中途の縦断面よりも大きい矩形の送り台用貫通穴を備えるとともに前記送り台ガイドに固着され、隔壁板を挟んで第１シール体の反対側に少なくとも１枚以上の第２シール体を配置し、前記両シール体が前記隔壁板の前後で固定配置されたコの字状のシール体ガイドにより上下動可能に各別に案内されるとともに該第２シール体を送り台に挿通し、長円軌道に沿って送り台が運動する時に両シール体の少なくとも一方を送り台で隔壁板に付勢させ、前記送り台用貫通穴を常時遮蔽するようにし、両シール体、隔壁板およびシール体ガイドが送り台ガイドの手前側に配置されていることを特徴とする。
【０００８】
なお、シール体ガイドの下部がミシンフレーム内に開口していることが望ましい。
【０００９】
さらに、両シール体を構成する部材は弾性体を板状に形成してなるのが望ましく、第２シール体が複数枚で構成されるとより良い。
【００１０】
【作用】
本発明によれば、隔壁板を挟んで前後に第１シール体と第２シール体とが各々上下動可能に配置されているので、後側の第１シール体が送り台の前進時に隔壁板を付勢し、前側の第２シール体が送り台の後退時に隔壁板を付勢する。これにより、ミシンフレームの窓部に隔壁板の送り台用貫通穴は常時遮蔽される。なお隔壁板の前後で固定配置されたコの字状のシール体ガイドで両シール体を上下動可能に各別に案内させると、送り台の長円運動時に生じる両シール体の帯同移動が隔壁板の付近で行われるように規制される。またシール体ガイドの下部をミシンフレーム内に開口しておくと、シール体で切られた潤滑油が主にコの字状のシール体ガイドの内部を通じてミシンフレーム内に還流される。さらに、両シール体を、弾性体を板状に形成してなる部材で構成すると、両シール体と挿通される送り台との摺接部におけるシール性が向上し、特に第２シール体を複数枚で構成すると、第２シール体手前側への潤滑油の漏洩をより防止することが出来る。
【００１１】
【発明の実施の形態】
以下に、本発明の実施の形態を図面に基づいて説明する。図１〜図３に示す様に、送り装置の送り台Ａは、左右に並設された主送り台７および差動送り台８からなり、送り台Ａの端部はミシンフレーム１前面の窓部２より手前に突出している。主軸６の偏心部２５に回転自在に嵌挿された角駒２７は送り台Ａの中間二股部７ａ，８ａを支持し、主軸６の回動時に角駒２７より送り台Ａに上下動が伝達される。ミシンフレーム１に取着された軸３０は角駒２８を介して送り台Ａの後方二股部７ｂ、８ｂを支持している。主送り台７はリンク３１を介してクランク３２に連結され、差動送り台８はリンク２３を介してクランク２４のスライダー２４ａに連結されている。クランク２４，３２は主軸６の回動に連動して揺動し、両送り台７，８に前後動を伝達する。
【００１２】
上記した構成は公知の送り装置の上下駆動機構および前後駆動機構の一部を示したものであり、図示しない駆動源によって主軸６が回動すると両機構は協働し、送り台Ａは図２に示す長円軌跡Ｒの矢印に沿って動く。これにより、送り台Ａに取着された送り歯９，１０がミシンの縫製部において生地を矢印Ｆ方向に送る。
【００１３】
図１、図３に示す様に、ミシンフレーム１前面の窓部２には送り台ガイド５が配置され、送り台ガイド５の取り付け部はネジ１３でミシンフレーム１に固着されている。窓部２は凹状の切り欠きを有する。また、送り台ガイド５の手前側には、コの字状のシール体ガイド１１，１２および隔壁板４が配置され、これらの部材は送り台ガイド５の取り付け部にネジ１４で固着されている。つまり隔壁板４はミシンフレーム１前面の窓部２に設けられ、シール体ガイド１１，１２は隔壁板４の前後で固定配置されている。シール体ガイド１１前面には上下方向に延びる溝１１ｂが形成され、溝１１ｂの上部には生地送り方向Ｆに沿って貫通する矩形状の貫通穴１１ａが形成されている。隔壁板４の上部にも同様に生地送り方向Ｆに沿って貫通する矩形状の貫通穴４ａが形成されている。貫通穴４ａ，１１ａは送り台Ａにおける中途の縦断面よりも大きい矩形となっている。シール体ガイド１１の溝１１ｂつまり隔壁板４の後側には第１シール体１５が上下の摺動自在に嵌挿されている。第１シール体１５を構成する部材は弾性体を長方形の板状に形成してなる部材により構成され、その例としてポリウレタンがある。その上部には送り台Ａが挿通される矩形状の貫通穴１５ａが形成されている。
【００１４】
なお、本実施例においてシール体ガイド１１には矩形状の貫通穴１１ａが形成されているが、その形状は図５に示す様に凹状の溝１１ｃであってもよい。また図６に示す様にシール体ガイド１１の代替構造として、送り台ガイド５の一部つまり送り台ガイド５の前面に形成された溝５ｂを用い、該溝５ｂに第１シール体１５が上下の摺動可能に嵌挿されるような構成にしてもよい。本実施の形態においては、シール体ガイド１１，１２および隔壁板４は送り台ガイド５の一部に固着されているが、これに限定されるだけでなく、ミシンフレーム１に固着されていてもよい。
【００１５】
シール体ガイド１２の後面には上下方向に延びる溝１２ｂが形成され、溝１２ｂの上部には生地送り方向Ｆに沿って貫通する貫通穴１２ａが形成されている。貫通穴１２ａは送り台Ａにおける中途の縦断面よりも大きい矩形となっている。溝１２ｂには第２シール体１６，１６が上下の摺動自在に嵌挿されている。第２シール体１６，１６はシール体１５と同様の部材２枚を前後に連接するように構成されている。また、第２シール体１６，１６の上部には矩形の貫通穴１６ａ，１６ａが形成されている。つまり第２シール体１６，１６は隔壁板４を挟んで第１シール体１５の反対側に上下動可能に配置されている。
【００１６】
送り台Ａ端部への挿通は、送り台ガイド５、シール体ガイド１１の貫通穴１１ａ、第１シール体１５、隔壁板４の貫通穴４ａ、第２シール体１６，１６、シール体ガイド１２の貫通穴１２ａ、の順に行われ、これらの部材は送り台Ａの端部とともに窓部２の手前側に位置付けられている。送り台ガイド５の案内面５ａに送り台Ａの左右面が摺接し、第１シール体１５および第２シール体１６，１６を構成する部材の貫通穴１５ａ，１６ａ，１６ａは送り台Ａを弾性的に付勢しながら摺接している。つまり、少なくとも貫通穴１５ａ，１６ａ，１６ａおよびその周辺は弾性的であり、貫通穴１５ａ，１６ａ，１６ａは送り台Ａをスライド可能に密着する。そして、主送り台７の端部には主送り歯９がネジ（図示せず）で取着され、差動送り台８の端部には差動送り歯１０がネジ３４で取着されている。各送り歯９，１０はシール体ガイド１２より手前に配置されている。また、シール体ガイド１１，１２および隔壁板４において、各上部はミシンフレーム１の上部を覆うカバー３で覆われており、各下部は窓部２の手前側に形成されたミシンフレーム１の湾曲部１ａに面している。なお、シール体ガイド１１，１２の下部はミシンフレーム１内に開口しており、第１シール体１５および第２シール体１６，１６で切られた潤滑油は主にシール体ガイド１１，１２の内部を通じてミシンフレーム１内に還流される。
【００１７】
以上の様に構成されたミシンの送り機構の動作を以下に説明する。図示しない駆動源によって主軸６を図２において反時計回りに回動させると、送り台Ａは前述した様に長円軌跡Ｒの矢印に沿って動く。このとき第１シール体１５は送り台Ａの上下動に追従して溝１１ｂ内を上下動するが、その前後動はシール体ガイド１１および隔壁板４によって規制される。同様に第２シール体１６，１６についても溝１２ｂ内を上下動するが、第２シール体１６，１６の前後動は隔壁板４および第２シール体ガイド１２によって規制される。また、ミシン駆動中はミシンフレーム１内に潤滑油が継続して供給される。
【００１８】
上述した送り台Ａの長円運動において、送り台Ａが生地送り方向Ｆに逆らって前進するときは、図４（ａ）に示す様に第１シール体１５が隔壁板４を後方より付勢し隔壁板４の貫通穴４ａを遮蔽する。また、送り台Ａが生地送り方向Ｆに沿って後退するときは、図４（ｂ）に示す様に第２シール体１６が隔壁板４を前方より付勢し隔壁板４の貫通穴４ａを遮蔽する。つまり、送り台Ａの運動時に両シール体１５，１６の少なくとも一方を送り台Ａで隔壁板４に付勢させ、隔壁板４の送り台用貫通穴４ａを常時遮蔽する。この様なシール体の作用により、隔壁板４の貫通穴４ａを通じて手前側に流出する潤滑油の量を極めて僅かなものにできる。また、送り台Ａに付着した潤滑油はその殆どが第１シール体１５で切られ、僅かに残った潤滑油も、送り台Ａの前進時に第２シール体１６によって切られる。なお、第２シール体１６を２枚で構成すると、第２シール体１６を構成する部材、つまりポリウレタンが前後に連接されることとなり、第２シール体１６手前側への油漏れをより防止することが出来る。この隔壁板４の手前側に流出した僅かな潤滑油は、送り台Ａの後退時に隔壁板４の貫通穴４ａを通じて隔壁板４の後側に再び戻されるか、あるいは隔壁板４の前面を下方に伝い、ミシンフレーム１の湾曲部１ａを通じてミシンフレーム１内に還流される。
【００１９】
【発明の効果】
以上説明したように、本発明によれば、送り台の長円運動時に両シール体の少なくとも一方を送り台で隔壁板に付勢させ、隔壁板の送り台用貫通穴を常時遮蔽するようにしたので、隔壁板の送り台用貫通穴からの潤滑油の漏洩を防止することが出来る。なお送り台の長円運動時に生じる両シール体の帯同移動がコの字状のシール体ガイドにより隔壁板の付近で行われるように規制されるので、両シール体の耐久性を向上させることが出来る。またミシンフレーム前面の窓部に送り台案内用の送り台ガイドを設けると共に両シール体、隔壁板および前記シール体ガイドを送り台ガイドの手前に配置させると、送り台ガイドに潤滑油が十分に供給可能となるので、送り台の焼き付きや温度上昇を抑えることが出来、さらに劣化に伴う両シール体の交換を容易に行うことが出来る。
【００２０】
【図面の簡単な説明】
【図１】本発明に係るミシンの送り装置の概要を示す部分斜視図である。
【図２】同上装置の概略側面図である。
【図３】同上装置の要部を示す部品展開図である。
【図４】同上装置の運動時におけるシール体の作用状態を示す部分拡大説明図である。
【図５】同上装置のシール体ガイドにつき、別の実施例を示す要部の部品展開図である。
【図６】同上装置のシール体ガイドにつき、更に別の実施例を示す要部の部品展開図である。
【符号の説明】
１ミシンフレーム
１ａ湾曲部
２窓部
４隔壁板
４ａ貫通穴
５送り台ガイド
７主送り台
８差動送り台
９主送り歯
１０差動送り歯
１１シール体ガイド
１１ａ貫通穴
１１ｂ溝
１２シール体ガイド
１２ａ貫通穴
１２ｂ溝
１５第１シール体
１６第２シール体
Ａ送り台
Ｒ長円運動軌跡[0001]
[Industrial application fields]
The present invention relates to a sewing machine feeding device that feeds a cloth with a feed dog that makes an elliptical motion in a chain stitch sewing machine or the like, and more specifically, the lubricating oil leaks through a feed base to which the feed dog is attached. The present invention relates to a sewing machine feeding device provided with a sealing mechanism for preventing it.
[0002]
[Prior art]
In a conventional sewing machine feeder, oil leakage is prevented by a seal body inserted through a feed base (see, for example, Patent Document 1). The feed table is connected to a known vertical drive mechanism and front / rear drive mechanism, and the end of the feed table protrudes from a partition plate (support) fixed to a window portion (notch) on the front surface of the sewing machine frame. A feed dog is attached to the end of the feed base, and the seal body is disposed behind the partition plate so as to be slidable up and down. The seal body is urged against the partition plate by an elastic pressing plate.
[0003]
According to the conventional sewing machine feed device having such a configuration, the feed base moves in an elliptical manner up and down and back and forth along the cloth feed direction when the sewing machine is driven, and the lubricating oil is generally introduced into the machine frame by a known oil supply mechanism. Will be supplied. At this time, the seal body slides up and down along with the elliptical movement of the feed base to cut off the lubricant adhering to the feed base, so that the lubricant oil does not leak to the outside through the feed plate through hole of the partition plate. It was.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 49-139055 (first page, Fig. 1-2)
[0005]
[Problems to be solved by the invention]
However, in the conventional sewing machine feeding device, the sealing body is configured to slide up and down while being urged by the elastic pressing plate against the partition plate, so that the durability of the sealing body is poor when the sewing machine is driven at high speed. There was a problem. Further, at this time, if the seal body is deformed without being able to follow the vertical movement of the feed base, a gap may be formed on the sliding contact surface between the seal body and the feed base, and the lubricating oil may not be sufficiently cut. When the urging force of the elastic pressing plate is weakened to avoid this, a gap is generated between the partition plate and the seal body as the feed table moves back and forth, and the lubricating oil enters from the gap. When the lubricating oil that has entered from this gap reaches the through hole for the feed plate of the partition plate through the space between the partition plate and the seal body, there is a risk of oil leakage outside the sewing machine frame.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can improve the durability of a sealing body inserted through a feed base and prevent the lubricating oil from leaking to the outside through a feed hole in the partition plate. It aims to provide a feeding device.
[0007]
In order to achieve the above object, the present invention provides a feed base that partially protrudes from a window portion on the front surface of the sewing machine frame, a vertical drive mechanism and a longitudinal drive mechanism that are connected to the feed base, and a feed provided in the window portion. A feed plate guide for guiding the movement of the table; a partition plate provided in the window; and a first seal body which is disposed on the rear side of the partition plate so as to be movable up and down and is inserted through the feed table. When the drive mechanism and the front-rear drive mechanism cooperate, the first seal body is urged toward the partition plate side, and the feed dog attached to the end of the feed base moves along the elliptical track at the sewing portion of the sewing machine. In the sewing machine feeder,
The partition plate is provided with a rectangular through hole for a feed base that is larger than a longitudinal section in the middle of the feed base, and is fixed to the feed base guide, and at least one sheet on the opposite side of the first seal body across the partition plate. The second seal bodies are arranged, and both the seal bodies are guided separately by a U-shaped seal body guide fixedly arranged at the front and rear of the partition plate so as to be movable up and down, and the second seal bodies are fed. inserted the platform, it is biased to the partition plate at a feed of at least one stand of the two seal body when the feed bar is moved along the long circular orbit, so as to always shield the feed table through holes, both the seal body The partition plate and the seal body guide are arranged on the front side of the feed base guide .
[0008]
It is desirable that the lower part of the seal body guide is opened in the sewing machine frame.
[0009]
Furthermore, it is desirable that the members constituting both the sealing bodies are formed of an elastic body in a plate shape, and it is better if the second sealing body is constituted by a plurality of sheets.
[0010]
[Action]
According to the present invention, since the first seal body and the second seal body are arranged so as to be movable up and down with the partition plate in between, the first seal body on the rear side is the partition plate when the feed base moves forward. The second seal body on the front side urges the partition plate when the feed base is retracted. Thereby, the through hole for the feed plate of the partition plate is always shielded from the window portion of the sewing machine frame. In addition, when both seal bodies are guided separately by the U-shaped seal body guides fixedly arranged at the front and rear of the partition plate so that they can be moved up and down, the movement of the two seal bodies in the same direction during the elliptical movement of the feed base is caused by the partition plate. To be performed in the vicinity of If the lower part of the seal body guide is opened in the sewing machine frame, the lubricating oil cut by the seal body is mainly returned to the sewing machine frame through the inside of the U-shaped seal body guide. Furthermore, if both the sealing bodies are made of a member formed by forming an elastic body in a plate shape, the sealing performance at the sliding contact portion between the both sealing bodies and the feed base inserted is improved, and in particular, a plurality of second sealing bodies are provided. If comprised by sheet | seat, the leakage of the lubricating oil to the 2nd seal body front side can be prevented more.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, the feed base A of the feed device is composed of a main feed base 7 and a differential feed base 8 arranged side by side on the left and right, and the end of the feed base A is a window on the front surface of the sewing machine frame 1. It protrudes from the front of part 2. A square piece 27 rotatably inserted into the eccentric portion 25 of the main shaft 6 supports the intermediate bifurcated portions 7a and 8a of the feed base A, and the vertical movement is transmitted from the square piece 27 to the feed base A when the main shaft 6 rotates. Is done. The shaft 30 attached to the sewing machine frame 1 supports the back bifurcated portions 7b and 8b of the feed base A via the square piece 28. The main feed base 7 is connected to the crank 32 via a link 31, and the differential feed base 8 is connected to a slider 24 a of the crank 24 via a link 23. The cranks 24 and 32 oscillate in conjunction with the rotation of the main shaft 6, and transmit the longitudinal movement to the two feed bases 7 and 8.
[0012]
The above-described configuration shows a part of a vertical drive mechanism and a front / rear drive mechanism of a known feed device. When the main shaft 6 is rotated by a drive source (not shown), both mechanisms cooperate and the feed base A is shown in FIG. It moves along the arrow of the ellipse locus R shown in FIG. As a result, the feed dogs 9 and 10 attached to the feed base A feed the fabric in the direction of arrow F at the sewing portion of the sewing machine.
[0013]
As shown in FIGS. 1 and 3, a feed base guide 5 is disposed in the window portion 2 on the front surface of the sewing machine frame 1, and a mounting portion of the feed base guide 5 is fixed to the sewing machine frame 1 with screws 13. The window part 2 has a concave notch. Further, U-shaped seal body guides 11 and 12 and a partition plate 4 are arranged on the front side of the feed base guide 5, and these members are fixed to a mounting portion of the feed base guide 5 with screws 14. . That is, the partition plate 4 is provided in the window portion 2 on the front surface of the sewing machine frame 1, and the seal body guides 11 and 12 are fixedly disposed in front of and behind the partition plate 4. A groove 11b extending in the vertical direction is formed on the front surface of the seal body guide 11, and a rectangular through hole 11a penetrating along the cloth feeding direction F is formed on the groove 11b. Similarly, a rectangular through hole 4 a penetrating along the dough feeding direction F is also formed in the upper part of the partition plate 4. The through holes 4 a and 11 a have a rectangular shape that is larger than the longitudinal cross section of the feed base A. A first seal body 15 is slidably fitted up and down on the groove 11 b of the seal body guide 11, that is, on the rear side of the partition plate 4. The member which comprises the 1st seal body 15 is comprised by the member formed by forming an elastic body in a rectangular plate shape, and there exists a polyurethane as the example. A rectangular through hole 15a through which the feed base A is inserted is formed at the upper part.
[0014]
In the present embodiment, the seal body guide 11 is formed with a rectangular through hole 11a, but the shape may be a concave groove 11c as shown in FIG. Further, as shown in FIG. 6, as an alternative structure of the seal body guide 11, a groove 5b formed in a part of the feed base guide 5, that is, the front surface of the feed base guide 5, is used, and the first seal body 15 is vertically moved in the groove 5b. You may make it the structure inserted so that slidable. In the present embodiment, the seal body guides 11 and 12 and the partition plate 4 are fixed to a part of the feed guide 5. However, the present invention is not limited to this, and may be fixed to the sewing machine frame 1. Good.
[0015]
A groove 12b extending in the vertical direction is formed on the rear surface of the seal body guide 12, and a through hole 12a penetrating along the fabric feed direction F is formed in the upper part of the groove 12b. The through hole 12a has a rectangular shape that is larger than the longitudinal section in the middle of the feed base A. Second seal bodies 16, 16 are fitted into the groove 12b so as to be vertically slidable. The second seal bodies 16, 16 are configured to connect two members similar to the seal body 15 in the front-rear direction. In addition, rectangular through holes 16 a and 16 a are formed in the upper portions of the second seal bodies 16 and 16. That is, the second seal bodies 16 and 16 are disposed on the opposite side of the first seal body 15 with the partition plate 4 interposed therebetween so as to be movable up and down.
[0016]
Insertion into the end of the feed base A includes the feed base guide 5, the through hole 11 a of the seal body guide 11, the first seal body 15, the through hole 4 a of the partition plate 4, the second seal bodies 16 and 16, and the seal body guide 12. These members are positioned on the near side of the window portion 2 together with the end portion of the feed base A. The left and right surfaces of the feed base A are in sliding contact with the guide surface 5a of the feed base guide 5, and the through holes 15a, 16a, 16a of the members constituting the first seal body 15 and the second seal bodies 16, 16 elastically support the feed base A. It is in sliding contact with energizing. That is, at least the through holes 15a, 16a, and 16a and the periphery thereof are elastic, and the through holes 15a, 16a, and 16a closely contact the feed base A so as to be slidable. The main feed dog 9 is attached to the end of the main feed base 7 with screws (not shown), and the differential feed dog 10 is attached to the end of the differential feed base 8 with screws 34. Yes. Each feed dog 9, 10 is arranged in front of the seal body guide 12. Further, in the seal body guides 11 and 12 and the partition plate 4, each upper part is covered with a cover 3 that covers the upper part of the sewing machine frame 1, and each lower part is a curve of the sewing machine frame 1 formed on the near side of the window part 2. It faces the part 1a. The lower parts of the seal body guides 11 and 12 are opened in the sewing machine frame 1, and the lubricating oil cut by the first seal body 15 and the second seal bodies 16 and 16 is mainly used in the seal body guides 11 and 12. It is refluxed into the sewing machine frame 1 through the inside.
[0017]
The operation of the sewing machine feed mechanism configured as described above will be described below. When the main shaft 6 is rotated counterclockwise in FIG. 2 by a drive source (not shown), the feed base A moves along the arrow of the ellipse locus R as described above. At this time, the first seal body 15 moves up and down in the groove 11 b following the up-and-down movement of the feed base A, but the back-and-forth movement is regulated by the seal body guide 11 and the partition plate 4. Similarly, the second seal bodies 16 and 16 also move up and down in the groove 12 b, but the back and forth movement of the second seal bodies 16 and 16 is restricted by the partition plate 4 and the second seal body guide 12. Further, the lubricating oil is continuously supplied into the sewing machine frame 1 while the sewing machine is being driven.
[0018]
In the above-described elliptical movement of the feed table A, when the feed table A moves forward against the material feeding direction F, the first seal body 15 urges the partition plate 4 from the rear as shown in FIG. The through hole 4a of the partition wall plate 4 is shielded. When the feed base A moves backward along the material feeding direction F, the second seal body 16 urges the partition plate 4 from the front as shown in FIG. Shield. That is, at the time of movement of the feed base A, at least one of the seal bodies 15 and 16 is urged against the partition plate 4 by the feed base A, and the feed base through hole 4a of the partition plate 4 is always shielded. By such an action of the sealing body, the amount of lubricating oil flowing out to the near side through the through hole 4a of the partition plate 4 can be made extremely small. Further, most of the lubricating oil adhering to the feed base A is cut by the first seal body 15, and a slight amount of remaining lubricating oil is also cut by the second seal body 16 when the feed base A moves forward. If the second seal body 16 is composed of two sheets, the members constituting the second seal body 16, that is, polyurethane, are connected to the front and rear, thereby further preventing oil leakage to the front side of the second seal body 16. I can do it. The slight amount of lubricating oil that has flowed out to the front side of the partition plate 4 is returned again to the rear side of the partition plate 4 through the through holes 4a of the partition plate 4 when the feed base A moves backward, or the front surface of the partition plate 4 is lowered Circulated to the sewing machine frame 1 through the curved portion 1a of the sewing machine frame 1.
[0019]
【The invention's effect】
As described above, according to the present invention, at least one of the sealing bodies is biased to the partition plate by the feed table during the elliptical movement of the feed table, and the through hole for the feed plate of the partition plate is always shielded. Therefore, it is possible to prevent leakage of the lubricating oil from the feed plate through hole of the partition plate. In addition, since the band movement of both seal bodies that occur during the elliptical movement of the feed base is restricted to be performed near the partition plate by the U-shaped seal body guide, the durability of both seal bodies can be improved. I can do it. In addition, if a feed base guide for feed table guidance is provided in the window on the front of the sewing machine frame, and both the seal body, the partition plate, and the seal body guide are arranged in front of the feed base guide, sufficient lubrication oil will be applied to the feed base guide. Since supply becomes possible, seizure of the feed base and temperature rise can be suppressed, and further, both seal bodies can be easily replaced due to deterioration.
[0020]
[Brief description of the drawings]
FIG. 1 is a partial perspective view showing an outline of a sewing machine feeding apparatus according to the present invention.
FIG. 2 is a schematic side view of the apparatus.
FIG. 3 is a part development view showing a main part of the apparatus.
FIG. 4 is a partially enlarged explanatory view showing an action state of the seal body during the movement of the apparatus.
FIG. 5 is a part development view of the main part showing another embodiment of the seal body guide of the apparatus.
FIG. 6 is a part development view of the main part showing still another embodiment of the seal body guide of the apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sewing machine frame 1a Curved part 2 Window part 4 Partition board 4a Through hole 5 Feed base guide 7 Main feed base 8 Differential feed base 9 Main feed dog 10 Differential feed tooth 11 Seal body guide 11a Through hole 11b Groove 12 Seal body guide 12a Through hole 12b Groove 15 First seal body 16 Second seal body A Feed base R Oval motion locus

Claims

A feed base partially protruding from the window portion on the front surface of the sewing machine frame; a vertical drive mechanism and a front / rear drive mechanism coupled to the feed base; a feed base guide provided in the window portion for guiding the movement of the feed base; A partition plate provided in the window portion, and a first seal body that is disposed on the rear side of the partition plate so as to be movable up and down and is inserted into the feed base. In a sewing machine feeding device in which one seal body is urged toward the partition plate side, and the feed dog attached to the end of the feed base moves along an elliptical orbit at the sewing portion of the sewing machine,
The partition plate is provided with a rectangular through hole for a feed base that is larger than a longitudinal section in the middle of the feed base, and is fixed to the feed base guide, and at least one sheet on the opposite side of the first seal body across the partition plate. The second seal bodies are arranged, and both the seal bodies are guided separately by a U-shaped seal body guide fixedly arranged at the front and rear of the partition plate so as to be movable up and down, and the second seal bodies are fed. inserted the platform, it is biased to the partition plate at a feed of at least one stand of the two seal body when the feed bar is moved along the long circular orbit, so as to always shield the feed table through holes, both the seal body 2. A sewing machine feeding apparatus , wherein the partition plate and the seal body guide are arranged on the front side of the feed base guide .

The sewing machine feeding device according to claim 1, wherein a lower portion of the seal body guide is opened in a sewing machine frame.

3. The sewing machine feeding device according to claim 1, wherein the members constituting both the sealing bodies are formed by forming an elastic body into a plate shape.

The sewing machine feeding device according to claim 3 , wherein the second seal body is constituted by a plurality of sheets.