JPS581494A - Tape sending apparatus of sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape feed device for a sewing machine that applies tension to a stretchable rubber tape or the like for sewing.

The tape feeding device of conventional sewing machines applies tension to the tape to make the tape shrink. For example, it is impossible to switch between sewing with and without shrinkage in the middle of a single process such as pants and pants. ,&! The production value of the product was inferior.

The present invention eliminates such drawbacks and improves the quality of the product by adding a switching lever to the rubber tape feeder, and by operating this switching lever during the sewing process, it is possible to easily check whether or not there is any shrinkage. This is how it was done.

An embodiment of the present invention will be described below with reference to FIG. In the figure, (1) is a feed adjuster that is fixed with a screw (4) to a main shaft (3) that is rotatably supported in the Fi sewing machine frame (2) and rotates in one direction, and is composed of the following members. (5) is an eccentric wheel guide stand, which guides the eccentric wheel (6) so that it can slide toward the axis of the main shaft (3), and is attached to the main shaft (3) with a screw (4).

A bearing (8) press-fitted into the feed loft (7) is rotatably fitted to the outer diameter of the eccentric ring (6), and a bearing (8) press-fitted into the feed loft (7) is rotatably fitted to the outer diameter of the eccentric ring guide stand (5). A pin Ql) is screwed to the spiral groove cam H which is gradually displaced from the main shaft (3) of the feed adjustment cam (9) which is rotatably fitted therein.

@ is the eccentric wheel guide stand (5) and eccentric wheel (6) while the sewing machine is operating.
A spring that provides frictional resistance so that the phase of K screw 0
The tape feeder is built into the tape feeder c3]) which is fixed at the time, and the shaft 9a''i) (to) and the stop clutch o
A moan is pressed in. The CAVi clutch shaft is rotatably supported by bearing α7) (to) and rotates intermittently in one direction.

eυ is a feed roller, which is fixed to the clutch shaft with a screw (A). 4 is attached with a screw (E) to the shaft (C) which is loosely fitted with the rotatable VC in the tape feeder Q→
A presser roller is rotatably fitted loosely into a hole at the other end of the link (to), and is always urged to contact the feed lower Ql with a twisting panel. (C) is a screw on the shaft (C)?
This is a plate cam attached with a screw (to) to a shaft (b) which is rotatably inserted into a guide plate (to) which is attached to a guide plate (to) by a screw (to).

(to) is a switching lever that is screwed onto the axle. Reference numeral 2 denotes a drive arm having one end fixed with a stepped screw which loosely fits one end of the feed rod (7), and a bearing and a one-way drive clutch are press-fitted into the inner diameter.

The wheel is a thrust stopper collar on the drive arm (2) and is fixed to the clutch shaft (E). This clutch shaft (E) has a reservoir hole for supplying oil to the bearing @o4 (2) and the clutch (6), and is prevented from releasing oil by a screw (to). The wheel is constantly biased upward by a spring force by a push button slidably provided on the sewing machine frame (2).

The ring is a tape that is guided by a guide wire from a tape winder (not shown) and inserted between the guide wires (B), and by operating the switching lever as shown in Fig. 7, the presser roller 4 is moved to the feed roller (4). 2), and then inserted between the lower guide wire hoops, guided to the tape guide metal part, and guided under the presser foot) to prepare for sewing. ing. The horizontal positioning of the tape ring is done using a pair of guide metals fixed to the guide wire tI417) with screws and a threaded ring to position the guide wire t4.
It is regulated by a pair of guide metals fixed to t4. (Incorporated) is a guide wire-ring η fixed metal, which is attached to the tape feed stand 0υ. Reference numeral t4 is a needle bar that moves up and down via a crank mechanism as the main shaft (3) of the sewing machine rotates. 1
υ is the rubber tape - 〇 Layered fabric, 2) is the actual sewing thread.

Next, the operation of one embodiment of the present invention having the above structure will be described.

When sewing the laminated fabric 11) and tape with a seam shrinkage as shown in Fig. 10, the seams shown in Figs. 4 and 6
If the switching lever (to) is positioned toward the sewing person as shown in the figure, the plate cam (a) and lever (2) will become unrelated, and the presser roller ei3 will feed the tape loop under the bias of the twisting panel. Since it is held between the rollers υ, the intermittent movement of the feed roller (c) causes the tape Q and the laminated fabric 11) to be sewn in an intermittent interlocking amount set by the feed regulator (1). Here, to explain in detail the intermittent motion of the feed roller (2), the eccentricity of the feed adjuster (1) gives a reciprocating swinging motion to the drive arm (to) via the feed rod (7). As shown in Fig. 9, when the feed rod (7) swings counterclockwise, the one-way drive clutch () causes the shift latch shaft () to rotate in the same direction, and the feed rod (7) rotates in the opposite direction.
When the clutch shaft (E) swings clockwise, the clutch shaft (E) spins idly. When the clutch shaft is rotated, the feed adjuster (1) and the main shaft (3) make sure that the feed teeth of the sewing machine actually feed the cloth.
) is set. To adjust the amount of shrinkage, press the push button (1) to rotate the sewing machine pulley (not shown), and rotate the eccentric wheel (6) of the grooved cam αq relative to the main shaft (3).
By adjusting the amount of eccentricity of the feed roller e]
) of the sewing machine main shaft (3) - the rotation angle per revolution is adjusted.

Next, when sewing the matching fabric φυ and the tape loop without any sewing shrinkage as shown in FIG. 10, the switching lever C! If @ is placed on the sewing machine side, the presser roller (2) is separated from the feed roller (B) via the plate cam (to) and the feed roller (B) is given intermittent motion, but the tape wheel Therefore, since the sewing material is sewn only by the feed of the sewing machine body, no sewing shrinkage is applied. In addition, in order to perform shrink stitching, if the amount of feed of the tape wheel sent by the feed roller (2) is smaller than the amount of feed of the feed dog of the sewing machine, the tape (2) will be pulled and sewn, so that the stitching will be finished. Sewn items are those that are sewn with shrink stitches.

As described above, according to the present invention, the tape loop is held between the feed roller (2) and the presser roller (to), which are synchronized with the main shaft (3) of the sewing machine, and performs intermittent movement in only one direction. A constant tension is reliably applied to the tape loop regardless of the number of rotations, and the amount of shrinkage can be adjusted at will by pressing the push button ■. By operating (to), sewing without shrinkage stitching can be easily performed regardless of the feed roller Q1), which has the effect of making it possible to perform sewing with high product value.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is a front view seen from direction A in Fig. 1, Fig. 8 is a top view seen from direction A in Fig. 1, and Fig. 4. 1 is a side view as seen from the two directions in Figure 1, and is a state in which sewing is performed. FIG. Side sectional view of part of the feed roller and presser roller in the state shown in the figure,
Fig. 7 is a side sectional view of part of the feed roller and presser roller in the state shown in Fig. 5, Fig. 8 is a sectional view taken along the line ■-■ in Fig. 6, and Fig. 10 is a plan view showing a sewing product of the tape and the laminated cloth. In the figure, (3) is the main shaft, (7) is the rod, (b) is the feed roller, and (2) is the Presser roller, calligraphy tape, c!
4 is a lever. Agent Makoto Kuzuno - @'/m m tOs 3 Written amendment (spontaneous) Commissioner of the Japan Patent Office 1, Indication of case Patent application No. 1518-98718
11. Name of the invention Relationship to the case involving a person who makes sewing machine tape feeding device 3, supplementary IF Patent applicant address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Representative of Mitsubishi Electric Corporation Hitoshi Katayama Hachibe 4 Agent Address: 2-2-3 Marunouchi, Chiyo H1-ku, Tokyo
No. Mitsubishi Electric Corporation Name (6699) Patent attorney Makoto Kuzuno
-4 Subject of amendment (11f! Claims (2) in AMjJ)
Drawing 1: The content of the amendment (the scope of the 11% claim is shown in the attached sheet) is corrected. (Figure 21 is corrected as shown in the attached sheet.) The scope of the above claims is a sewing machine equipped with a needle bar that moves up and down by a main shaft that is pivotally supported on the machine frame of the sewing machine. A variable feed adjuster is installed so that the amount of eccentricity with respect to the main shaft can be adjusted.The variable feed adjuster is connected to the feed rod through a one-way clutch and is installed on the outside of the sewing machine frame, which rotates intermittently only in one direction. a tape feed roller, a presser roller provided opposite to the feed roller, a spring biased to press the presser roller to rotate and feed the tape in cooperation with the feed roller; A tape feeding device for a sewing machine comprising a switching lever that separates the presser roller from the feed roller against an urging force and releases the tape feeding by cooperation between the presser roller and the feed roller.

Claims (1)

[Claims] A variable feed adjuster is installed so that the amount of eccentricity between the main shaft and the shaft can be adjusted by rotating the main shaft, which is pivotally supported on the machine frame of the sewing machine.The feed loft is connected to this adjuster through a one-way clutch, and only works in one direction. A tape feed roller installed on the outside of the sewing machine frame rotates intermittently, a presser roller is provided opposite the feed roller, and the presser roller is usually rotated in cooperation with the feed roller to feed the tape. A switching lever is provided which resists the biasing force of the spring and separates the press roller from the feed roller to release the tape feeding by the cooperation of the press roller and the feed roller. Sewing machine tape feeder.