JP2013048846A5

JP2013048846A5 -

Info

Publication number: JP2013048846A5
Application number: JP2011189873A
Authority: JP
Filing date: 2011-08-31
Publication date: 2014-10-02
Anticipated expiration: 2031-08-31

Description

本発明は、上記の課題を解決するため、針板着脱機構として、ミシンの下方の運動機構を内蔵するベッド部に針板を着脱する針板着脱機構であって、針板とベッド部に設けられて互いに嵌合し、針板をベッド部の固定位置に案内する案内手段と、針板に設けられた係合部とベッド部に設けられた被係合部とを有し、針板をベッド部の固定位置に押圧移動することによって、係合部と被係合部が係合し、固定状態を維持する固定手段と、ベッド部に設けられ、針板を下方から押圧して係合部と被係合部の係合を解除するとともに、針板を上方の開放位置へ移動させる開放手段とを備えたことを特徴とする構成を採用する。
In order to solve the above-described problems, the present invention provides a needle plate attachment / detachment mechanism for attaching / detaching a needle plate to / from a bed portion incorporating a motion mechanism below the sewing machine as a needle plate attachment / detachment mechanism, provided on the needle plate and the bed portion. A guide means for guiding the needle plate to a fixed position of the bed portion, an engaging portion provided on the needle plate, and an engaged portion provided on the bed portion. The engaging part and the engaged part are engaged by pressing and moving to the fixed position of the bed part, and a fixing means for maintaining the fixed state is provided, and the needle part is engaged by pressing the needle plate from below. A structure is provided that includes an opening means that releases the engagement between the portion and the engaged portion and moves the needle plate to the upper open position.

本発明の針板着脱機構の別の具体的実施形態として、案内手段は、針板に設けられ、針板の下方に向けてすり鉢状に広がるテーパーガイド面を有する位置決め孔と、受け板により保持された固定片の先端部が形成する、針板の仮想回転軸に略垂直な平行面をなす平行ガイド面を有する案内長孔と、ベッド部に設けられ、位置決め孔に嵌合する位置決めピンと、平行ガイド面に摺接し案内長孔に摺動可能に嵌合する案内ピンとからなることを特徴とする構成、また、開放手段は、操作部と、操作部により上下方向に駆動され、針板の下面を突き上げて針板を上方の開放位置へ押し上げる突き上げ棒と、操作部が操作されていないときは、突き上げ棒を針板の下方に押し下げる戻りばねとからなることを特徴とする構成、操作部は、ベッド部に回動可能に枢着され、一端に指かけ突部を備えた操作レバーであることを特徴とする構成を採用する。
さらに、本発明のミシンとして、前記針板着脱機構を備えたことを特徴とする構成を採用する。
As another specific embodiment of the needle plate attaching / detaching mechanism of the present invention, the guide means is provided on the needle plate, and is held by a positioning hole having a tapered guide surface extending in a mortar shape toward the lower side of the needle plate, and a support plate. A guide long hole having a parallel guide surface that forms a parallel surface substantially perpendicular to the virtual rotation axis of the needle plate formed by the distal end portion of the fixed piece, a positioning pin provided in the bed portion and fitted in the positioning hole; A structure characterized by comprising a guide pin that is slidably contacted with the parallel guide surface and slidably fitted into the guide elongated hole, and the opening means is driven up and down by the operation portion and the operation portion , An operation unit comprising a push-up bar that pushes up the lower surface and pushes the needle plate up to an open position, and a return spring that pushes the push-up bar down the needle plate when the operation unit is not operated. Times on the bed Capable pivoted, to adopt a configuration which is a control lever provided with a finger rest projection at one end.
Furthermore, as the sewing machine of the present invention, a configuration characterized by including the needle plate attaching / detaching mechanism is adopted.

図４，５に示すように、受け板１２ａ，１２ｂは、それぞれねじ１８ａ，１８ｂにより上部支持壁１７上面に固定されており、針板８を装着する際には、針板８の一端面から突出して設けられた固定片２２ａ，２２ｂを固定位置に保持できるようになっている。
図７に示すように、受け板１２ａ，１２ｂには、上方に所定角度傾斜して立ち上がった押さえ片１９ａ，１９ｂが設けられ、押さえ片１９ａ，１９ｂと上部支持壁１７の上面との間に、固定片２２ａ，２２ｂがそれぞれ嵌挿され、挟持される。
一方の受け板１２ｂは、押さえ片１９ｂの両側に、固定片２２ｂよりわずかに広い間隔をもって対向する挿入ガイド面２１を有する導入部２０が設けられており、固定片２２ｂを嵌挿位置へ案内して、針板８をベッド部４に装着するための最初の位置決めの機能をも担う。
As shown in FIGS. 4 and 5, the receiving plates 12 a and 12 b are fixed to the upper surface of the upper support wall 17 by screws 18 a and 18 b, respectively. The protruding fixed pieces 22a and 22b can be held in a fixed position.
As shown in FIG. 7, holding plates 12 a and 12 b are provided with holding pieces 19 a and 19 b that rise upward at a predetermined angle, and between the holding pieces 19 a and 19 b and the upper surface of the upper support wall 17. The fixing pieces 22a and 22b are respectively inserted and clamped.
One receiving plate 12b is on both sides of the pressing pieces 19b, inlet portion 20 is provided with an insertion guide surface 21 facing with a slightly wider interval than the fixed piece 22 b, guides the fixing piece 22b to the inserting position Thus, the first positioning function for mounting the needle plate 8 to the bed portion 4 is also performed.

Claims

A needle plate attaching / detaching mechanism for attaching / detaching a needle plate to / from a bed portion incorporating a motion mechanism below the sewing machine,
Guide means provided on the needle plate and the bed portion and fitted to each other, and guiding the needle plate to a fixed position of the bed portion;
It has an engaging portion provided on the needle plate and an engaged portion provided on the bed portion, and the engaging portion and the engaged portion are engaged by pressing and moving the needle plate to the fixed position of the bed portion. Fixing means for maintaining a fixed state,
Provided with a release means that is provided in the bed portion and presses the needle plate from below to release the engagement between the engaging portion and the engaged portion, and moves the needle plate to the upper open position. Needle plate attaching / detaching mechanism.

The fixing means further includes a locking means for holding one end portion of the needle plate at a fixed position of the bed portion,
The locking means is provided at one end of the needle plate and the bed portion, and the tip of the fixed piece is sandwiched between the upper fixed surface of the bed portion and the needle plate can be rotated by a predetermined angle. The throat plate attaching / detaching mechanism according to claim 1, further comprising a receiving plate held on the needle plate.

The engaging portion of the fixing means is an engaging spring plate having a curved portion provided at the lower portion of the needle plate, and the engaged portion is an engaging standing wall raised at the upper portion of the bed portion. The throat plate attaching / detaching mechanism according to claim 1, wherein a notch portion into which a curved portion of the engaging spring plate is fitted is provided.

A taper portion is provided at the upper end of the engagement standing wall, and the engagement spring plate is supported by the taper portion and maintains the open state of the needle plate when the needle plate moves from the fixed position to the upper open position. The throat plate attaching / detaching mechanism according to claim 3, wherein the throat plate attaching / detaching mechanism is disposed on the needle plate.

The guide means is provided on the needle plate, and includes a positioning hole having a tapered guide surface extending in a mortar shape toward the lower side of the needle plate, and a virtual rotation of the needle plate formed by the tip of the fixed piece held by the receiving plate. A guide long hole having a parallel guide surface that forms a parallel surface substantially perpendicular to the shaft, a positioning pin provided in the bed portion and fitted into the positioning hole, and a sliding contact with the parallel guide surface and slidably fitted into the guide long hole The throat plate attaching / detaching mechanism according to any one of claims 2 to 4, wherein the throat plate attaching / detaching mechanism comprises:

The release means is driven by the operation unit, the operation unit up and down, pushes up the lower surface of the needle plate and pushes the needle plate up to the open position, and when the operation unit is not operated, The throat plate attachment / detachment mechanism according to any one of claims 1 to 5, further comprising a return spring that is pushed down below the throat plate.

The throat plate attaching / detaching mechanism according to claim 6, wherein the operating portion is an operating lever pivotally attached to the bed portion and having a finger hooking protrusion at one end.

Sewing machine characterized by comprising a throat plate detaching mechanism according to claim 1.