JPH0331260Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fabric feeding mechanism for a sewing machine for pattern sewing. The fabric to be sewn is sandwiched between a pair of upper and lower pattern templates having an upper and lower pattern plate, the pattern plates and the fabric are moved along a guide groove, and the desired pattern is sewn by sewing with a sewing machine needle. This invention relates to a fabric feeding mechanism for a pattern sewing machine.

[Conventional technology]

BACKGROUND ART Conventionally, there have been cases in which sewn products of the same shape are mass-produced, and in this case, it has been extremely difficult to form each sewn product in exactly the same sewing state and shape. In particular, when there was a sewn portion consisting of a curved surface, etc., the difference was particularly noticeable.

For this reason, the pattern part as a sewing pattern,
The fabric is held between a pair of upper and lower pattern templates having guide grooves, and the fabric is fed forward by a feeding mechanism with the guide grooves aligned with guide pins formed on a workbench to obtain a large number of uniformly shaped sewn products. There are things that are made to be.

[Problems to be solved by the invention] However, in conventional pattern sewing machines, it is necessary to efficiently and reliably feed the pattern template and the fabric held between the pattern templates. Currently, it is not possible to feed the fabric efficiently and reliably.In particular, bends and curves are formed in the guide groove of the pattern template, making it difficult to sew while moving the pattern template to accommodate the bends and curves. When doing so, it must be done manually, which has the drawback of making the work complicated.

The purpose of this invention is to be able to feed pattern templates and fabric efficiently and reliably, to significantly improve work efficiency, to be economically superior, and to sew products with desired patterns with high precision. The present invention provides a fabric feeding mechanism for a pattern sewing machine that can perform the following functions.

[Means for solving problems]

The present invention has been made in view of the above-mentioned problems, and is made by sandwiching the fabric to be sewn between a pair of upper and lower pattern templates each having a guide groove formed at a predetermined distance from a pattern serving as a sewing pattern. The lower guide groove of the pattern template is fitted into a guide pin protruding from the workbench, and the pattern template is fed while being guided by a guide roller provided so as to come into contact with the upper pattern template. In a fabric feeding mechanism of a pattern sewing machine that is moved by a member to perform sewing, a substrate is provided extending horizontally on the pivot shaft of the guide roller, and a substantially L-shaped actuating member is provided on the substrate. Rotatably supported by a pivot shaft extending in the vertical direction,
The actuating member is formed of one end extending in the longitudinal direction of the substrate and the other end formed on the detection piece, and a notch is formed in a portion of the substrate facing the one end of the actuating member, and one end of the actuating member A driven pin is formed to protrude downward and is slidably fitted into a guide groove of the upper pattern plate through a notch in the substrate, and the driven pin is connected to the guide groove on a large curved surface of the guide groove. By moving left and right along the groove, one end of the actuating member rotates left and right;
A drive control mechanism includes a drive roller that rotates a detection piece at the other end of the operating member, detects the rotation of the detection piece by a detection means, and drives the pattern template based on the output of the detection means. It is characterized by being designed to control the drive.

[Effect]

According to the present invention, a board extending in the horizontal direction is provided on the pivot shaft of the guide roller that contacts the upper side of the pattern template, and the substantially L-shaped actuating member provided with the driven pin is rotatably pivoted on the board. The driven pin is slidably fitted into the guide groove of the pattern plate, and furthermore, when the driven pin rotates in the left and right direction at the bent or curved portion of the guide groove, other than the actuating member The detection piece at the edge rotates, the rotation of this detection piece is detected by the detection means, and the drive mechanism is driven based on the output of the detection means, and the drive roller of the drive mechanism causes the pattern plate to move along with the fabric. sent,
It is possible to reliably sew along the bent portions and curved portions.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 to 5 each schematically show an embodiment of the fabric feeding mechanism of a pattern sewing machine according to the present invention, and a normal sewing machine can be used as the pattern sewing machine.

As shown in FIG. 1, a fabric 1 is held between a pair of upper and lower pattern templates 2 and 3, and in this embodiment, the edge portions of the pattern templates 2 and 3 are formed into a pattern portion 4 as a sewing pattern. A guide groove 5 into which a guide pin 61 (to be described later) fits is formed inside the pattern portion 4 at a predetermined distance from the pattern portion 4 . Fabric 1 sandwiched between pattern plates 2 and 3
The outer peripheral edge 1a of the sewing machine is sewn at a predetermined position set by the pattern section 4, and the pattern templates 2, 3 and the fabric 1 are sequentially sent forward by a feeding mechanism 12.

The feeding mechanism 12 includes a throat plate 21 , a conventionally known feeding member 31 provided on the workbench 11 on the side of the throat plate 21 , a guide roller 51 , and a guide pin 61 . The throat plate 21 is attached to the workbench 11 at a position where the sewing machine needle 13 moves up and down.

A shaft rod 44 is attached to the rear side of the sewing machine body 14 at the position where the sewing machine needle moves up and down.A mounting shaft 52 of a guide roller 51 is connected to this shaft rod 44, and a pair of rollers 53 are connected to the lower part of this mounting shaft 52. is rotatably attached by a pivot shaft 54. In addition to forming a pair of rollers 53, this guide roller 51 may be formed by one roller attached to one side.

As schematically shown in FIG. 4, the feeding member 31 has a rubber plate 32 attached to its upper surface, and the pattern template 2 is placed on the rubber plate 32 by a drive mechanism (not shown) that performs a crank motion. 3 and the fabric 1 are accurately fed out without slipping forward. Note that the feeding member 31 may be omitted, and the pattern templates 2 and 3 may be fed out by a drive control mechanism 71, which will be described later.

The guide pin 61 attached to the workbench 11 is inserted into the guide groove 5 of the pattern templates 2 and 3 mentioned above. This guide pin 61 is used when the guide grooves 5 formed on the pattern templates 2 and 3 are misaligned in the left-right direction, or when you want to move and adjust the sewing position in the left-right direction using the same pattern templates 2 and 3.
The position of the can be adjusted in the left and right direction.

The pivot shaft 54 of the guide roller 53
As shown in FIGS. 2 and 3, the substrate 55
extends horizontally and is integrally formed. In this embodiment, the substrate 55 is formed integrally with the pivot shaft 54, but it may be a separate body and fixed by welding or other means. An operating member 5 formed in a substantially L-shape is provided on the upper part of this substrate 55.
6 is rotatably supported by a pivot shaft 57 extending in the vertical direction, a notch 55a is formed in the base plate 55, and one end 56a of the actuating member 56 is connected to the notch 5.
I am facing 5a. A driven pin 58 is formed on the lower surface of the actuating member 56 to protrude downward. This driven pin 58 projects downward from the notch 55a of the substrate 55 and is slidably fitted into the guide groove 5 of the upper pattern template 2.

The other end 56b of the actuating member 56 is formed as a detection piece 59, and a detection means 62 for detecting rotation of this detection piece 59 in the left-right direction is disposed above the detection piece 59. The detection means 62 may be a conventionally known photosensing device such as a phototube or other electrical or mechanical sensing device. The detection output of this detection means 62 is supplied to the drive control mechanism 71 of the drive roller 72, and this drive control mechanism 71 controls the drive roller 7.
The vertical elevating means 73 and the rotation motor 74 are driven. The reference numeral 55b is a stopper for restricting rotation, and the reference numeral 55c is a cover.

The drive control mechanism 71, as shown in FIG.
It has a connecting rod connected to a movable member 75 of the vertical lifting means 73, and a U-shaped support bracket 78 is fixed to this connecting rod 76.
A shaft rod 81 is pivotally supported to be able to move vertically.
A drive roller 72 is attached to the lower end of the roller 1 via a bracket 83. An output shaft of a motor 74 is connected to a rotating shaft 85 of the drive roller 72 via a flexible wire 87.

A guide portion 77 of the shaft rod 81 is formed adjacent to the cylinder portion 74 of the vertical lifting means 73, and a spring 88 is provided at the upper end of the shaft rod 81 to absorb shock and provide support. A pair of upper and lower springs 92 and 93 are fitted to the shaft rod 81 at positions sandwiching an E-ring 91 provided near the middle of the bracket 78 in the vertical direction.

Therefore, the fabric 1 is held between a pair of upper and lower pattern plates 2 and 3 connected to each other, and the guide pins 6 of the work table 11 are inserted into the guide grooves 5 of the lower pattern plate 3.
When the sewing machine main body 14 is driven with the driven pin 58 formed at one end 56a of the actuating member 56 fitted into the guide groove 5 of the upper pattern plate 2, the feed member 31 As a result, the fabric 1 and pattern templates 2 and 3 are sent out in the forward direction.

By this feeding of the feeding member 31, the fabric 1 and pattern templates 2 and 3 are fed out along the guide groove 5 due to the engagement between the guide pin 61 and the guide groove 5, and a desired pattern is sewn onto the fabric 1. . When the guide groove 5 has a bent part, bent part, curved part, etc., the driven pin 58 that fits into the guide groove 5 of the pattern template 2 is located at the bent part, bent part, curved part, etc. Then, as shown by the arrow in FIG.
9 rotate in the same direction, a detection means 62 detects the rotation of this detection piece 59, and the drive control mechanism 71 is driven by the output of this detection means 62.

This drive control mechanism 71 reduces the sewing speed at the bent portion or the bending portion position of the guide groove 5,
That is, this includes control for slowing down the repetitive crank motion that is the drive mechanism of the feeding member 31 so as to obtain uniform sewing stitches at bent portions or bent portions. Further, the drive control mechanism 71 controls the movable member 7 of the up/down means 73 based on the output of the detection means 62.
5 is lowered, and the shaft rod 81 provided to the movable member 75 via the connecting rod 76 and the support bracket 78 is lowered, so that the drive roller 72 attached to the lower end of the shaft rod 81 comes into contact with the pattern template 2. When the driving roller 72 is detected to be in contact or pressed, and the driving roller 72 is lowered, the motor 74 is rotated forward or backward, and the driving roller 72 rotates the pattern templates 2, 3 and the fabric 1 into the pattern of the pattern templates 2, 3. The rotation is controlled according to the refraction or bending of the lens.

Next, when the patterns of the pattern plates 2 and 3 fall within a predetermined curved range or in a straight line, the output of the detection means 62 is turned off;
The movable member 75 of the vertical elevating means 73 is raised, and the feeding speed of the feeding member 31 becomes a predetermined constant speed.

[Effect of idea]

The above is the configuration of an embodiment of the fabric feeding mechanism of the pattern sewing machine according to the present invention. According to this configuration, a substrate is provided on the pivot shaft of the guide roller,
An actuating member is rotatably supported on the substrate, a driven pin provided on the actuating member is slidably fitted into a guide groove of the pattern plate, and the rotation of the actuating member is matched with the rotation of the detection piece. Then, the rotation of this detection piece is detected by the detection means, and the drive control mechanism is driven based on this detection output, and the vertical elevating means and the drive roller motor are rotated to move the fabric and the pair of upper and lower pattern templates to a predetermined position. The sewing machine can be rotated in the direction of , allowing the pattern template and fabric to be fed efficiently and reliably, significantly improving work efficiency, and sewing products with the desired pattern with high precision. It is possible to obtain a fabric feeding mechanism for a sewing machine for pattern sewing that can perform the following functions.

[Brief explanation of the drawing]

Figures 1 to 5 each schematically show an embodiment of the fabric feeding mechanism of a pattern sewing machine according to the present invention, and Figure 1 is a partial perspective view of the present invention applied to a normal sewing machine. 2 and 3 are a side view and a plan view of the main parts of the present invention, including the actuating member, FIG. 4 is a front view of the actuating member, and FIG. It is a front explanatory view. In the figure, 1... fabric, 2, 3... pattern template,
4... Pattern section, 5... Guide groove, 11... Work table, 12... Feeding mechanism, 14... Sewing machine body,
21... Throat plate, 31... Feeding member, 32... Rubber plate, 51... Guide roller, 53... Roller, 5
4... Pivoting shaft, 55... Board, 56... Operating member, 57... Pivoting shaft, 58... Driven pin, 59...
... detection piece, 61 ... guide pin, 62 ... detection means, 71 ... drive control mechanism, 72 ... drive roller, 73 ... vertical lifting means, 74 ... motor.

Claims (1)

[Scope of utility model registration request] The fabric to be sewn is held between a pair of upper and lower pattern templates having guide grooves formed at a predetermined distance from the pattern as a sewing pattern, and the guide grooves on the lower side of the pattern templates are formed to protrude onto the workbench. A sewing machine for pattern sewing, the sewing machine being adapted to sew by moving the pattern plate by a feeding member while being guided by a guide roller provided so as to fit into a guide pin that is attached to the upper pattern plate and to come into contact with the upper pattern plate. In the fabric feeding mechanism, a substrate is provided extending horizontally on the pivot shaft of the guide roller, and a substantially L-shaped actuating member is rotatably supported on the substrate by the pivot shaft extending vertically. , the actuating member has one end extending in the longitudinal direction of the substrate;
A notch is formed in a portion of the substrate facing the one end of the actuating member, and the one end of the actuating member is formed in a guide groove of the upper pattern plate. A driven pin is formed to protrude downward and is slidably fitted through a notch of the guide groove, and the driven pin moves in the left-right direction along the guide groove on the large curvature surface of the guide groove, so that the actuating member One end rotates in the left-right direction, a detection piece at the other end of the actuating member rotates, the rotation of the detection piece is detected by a detection means, and the pattern plate is set in a predetermined manner based on the output of the detection means. A fabric feed mechanism for a pattern sewing machine, characterized in that the fabric feed mechanism is configured to drive and control a drive control mechanism having a drive roller that is driven in a direction.