JP3013522U - Sewing machine slide ring - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose of the present invention is to obtain a slide ring that makes the cloth feeding action of the sewing machine smoother and can withstand long-term use. [Structure] The legs of the presser foot of the sewing machine are formed in a bifurcated shape, and long grooves penetrating in the fabric feeding direction are provided in the respective parts.
Plural concavo-convex portions formed on the inner peripheral surface of the circular slide ring are engaged in the long groove, press the cloth fed by the feed dog, and rotate while synchronizing with the feeding of the cloth and the operation of the feed dog. By smoothing the fabric feed and forming irregularities on the outer peripheral surface of the slide ring, the fabric can be fed more smoothly, and even if it is used for a long period of time, the slide ring will not slip on the fabric. The action can be performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a slide ring used when sewing with a sewing machine. In detail, the sewing machine is rotatably attached to the presser foot of the sewing machine, presses the cloth fed between the presser foot and the feed dog, and rotates in synchronization with the feed dog to feed the cloth accurately. Regarding the possible slide ring.

[0002]

[Prior art]

 This type of slide ring 24 that has been conventionally used is a circular ring made of Teflon resin or the like as shown in FIG. 6, and the inner peripheral surface of the circular ring is provided with a group of projections and depressions, and It is configured to be rotatable by engaging with a groove formed in the lower surface of the presser foot leg portion in the longitudinal direction. The projections and depressions 4 on the inner peripheral surface of the slide ring 24 are arranged below the leg 12 while engaging with any of the grooves 14a and 14b formed on the lower surface of the bifurcated legs 12a and 12b of the presser foot 8. In cooperation with the operation of the feed dog (not shown) that sends out the cloth (not shown), the cloth is sent forward while rotating. At this time, not only slippage prevention and stretch prevention of the cloth but also friction between the foot of the presser foot and the cloth and prevention of cloth breakage of the thin cloth are performed, and smooth sewing work is performed. However, this type of slide ring is provided with a group of protrusions and recesses that can be freely engaged and engaged with the presser foot leg only on the inner peripheral surface of the ring, so if you use it for a long period of time, provide a protrusion. The outer peripheral surface of the ring is worn and becomes slippery due to friction with the cloth, and sufficient pressure cannot be applied to the cloth. Therefore, it is not possible to achieve the desired sewing deviation prevention and cloth stretch prevention, and there is a problem that the slide ring often has to be replaced. Therefore, in order to solve the above problems, the present invention provides a slide ring for a sewing machine, which is a modification of the conventional slide ring and is described below.

[0003]

[Means for Solving the Problems]

 The slide ring and the feed dog are formed by the cooperation of the circular slide ring and the feed dog, which are formed on the inner peripheral surface with a plurality of concave and convex projections that engage with the groove formed in the feed direction on the lower surface of the foot of the sewing machine foot. In the slide ring capable of sending out the fabric arranged between the front and the rear, a plurality of uneven portions are formed on the outer peripheral surface of the circular slide ring.

[0004]

[Action]

 When the sewing machine is driven, the uneven projections on the inner peripheral surface of the slide ring move in the long grooves of the legs of the presser foot, and the uneven projections on the outer peripheral surface touch the cloth placed between the feed dog. As a result, the slide ring can be used for a long period of time as compared with the case where the cloth is smoothly fed forward and the projections and depressions are provided only on the inner peripheral surface.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of a slide ring 2 according to the present invention. Plural concavo-convex protrusions 4 are formed on the central portion of the inner peripheral surface of the slide ring 2, and plural concavo-convex portions 6 are formed on the outer peripheral surface thereof. The concave and convex portions 6 are usually formed in a triangular wave shape in cross section. The mounting groove 10 formed at the free end of the presser foot 8 is fixed to the presser bar 18 with a screw 20. Further, the leg portion 12 of the presser foot 8 of the sewing machine is divided into the forked portions 12a and 12b by the leg groove 13, and the through grooves 14a and 14b are formed in the longitudinal direction below the forked portions 12a and 12b. To do. The slide ring 2 according to the present invention is used by engaging with either or both of the through grooves 14a and 14b depending on the intended use. For example, in the case of both presser foot ordinary cloth sewing, both through grooves 14a and 14b are attached, and when the presser foot is sewn with fasteners, in the case of taped sewing, into the through groove 14b of the leg portion 12b. In the case of attaching a scarf, a slacks, a side fastener, etc. for holding, the outer peripheral concave-convex portion 6 of the slide ring 2 is rotatably attached to the through groove 14a of the leg 12a. The presser bar 18 and the presser foot 8 are lowered by lowering the vertical movement lever (not shown) of the sewing machine, and the cloth (not shown) is pressed by the lower surface of the presser foot leg 12 via the slide ring 2. When the sewing machine is driven, a needle (not shown) attached to the needle bar (not shown) of the sewing machine moves up and down in the needle hole formed in the needle plate (not shown), and the needle plate A seam is formed on the fabric in cooperation with a lower thread drawn from a bobbin provided on the lower side of the fabric. At the same time, the slide ring 2 rotates in the through-grooves 14a and 14b in the fabric feeding direction. By this rotation, the cloth is smoothly sent forward. The uneven portion 6 on the outer peripheral surface of the slide ring 2 according to the present invention is in direct contact with the cloth, which helps to feed the cloth more accurately and smoothly. The concave and convex portion 6 provided on the outer peripheral surface of the slide ring 2 may have any shape as long as the cloth can be smoothly sent out by contact with the cloth in addition to the triangular wave-shaped cross section. For example, a plurality of convex portion groups may be arranged in an array. Further, as shown in FIG. 5, a curved guard pin 22 can be attached to the upper end of the presser foot 8 so that the slide ring 2 is supported in the curved portion of the guard pin 22 and smoothly rotated so as not to fall.

[0006]

[Effect of device]

 In the invention of this application, uneven portions are formed on the outer peripheral surface of the slide ring to facilitate the feeding of the fabric and to use it for a long period of time as compared with the conventional example in which the outer peripheral surface is flat. It has the effect of being able to withstand.

[Brief description of drawings]

FIG. 1 is a side view of a slide ring according to the present invention.

FIG. 2 is a perspective view of a presser foot according to the present invention.

FIG. 3 is a side view of the slide ring according to the present invention attached to a presser foot.

FIG. 4 is an enlarged perspective view showing an engaged state of a slide ring and a leg portion of a presser foot according to the present invention.

FIG. 5 is an exploded perspective view of a guard pin mounting portion of a slide ring according to the present invention.

FIG. 6 is a side view of a conventional slide ring.

[Explanation of symbols]

 2 slide ring 4 inner peripheral uneven projection 6 outer peripheral uneven portion 8 presser foot 10 mounting groove 12a, 12b leg portion 13 leg groove 14a, 14b through groove 18 presser bar 20 guard pin

[Procedure amendment]

[Submission date] February 13, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 7

[Correction method] Added

[Correction content]

FIG. 7 is a partially cutaway cross-sectional view in which a lever is moved to make a shank of a presser foot attached to a presser bar and a leg portion detachable.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Added

[Correction content]

[Figure 7]

Claims (5)

[Scope of utility model registration request] 1. A slide ring is formed by the cooperation of a circular slide ring and a feed dog, the inner surface of which has a plurality of protrusions and recesses that engage with grooves formed in the feed direction on the lower surface of the leg of the presser foot of the sewing machine. In the slide ring that makes it possible to send the fabric placed between the feed dog and the feed dog forward,
A slide ring for a sewing machine, wherein a plurality of concave and convex portions are formed on an outer peripheral surface of the circular slide ring. 2. The slide ring for a sewing machine according to claim 1, wherein the uneven portion formed on the outer peripheral surface of the circular slide ring has a triangular wave cross section. 3. The slide ring for a sewing machine according to claim 1, wherein the concavo-convex portion formed on the outer peripheral surface of the circular slide ring is a convex portion provided in alignment. 4. A slide ring for a sewing machine according to claim 1, 2 or 3, wherein the shank of the presser foot and the legs are detachable. 5. The sewing machine slide ring according to claim 1, wherein a plurality of long grooves are formed under the presser foot of the sewing machine, and the slide ring is made of Teflon resin or the like.