JPS615877A - Cloth presser of quilting 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]

(A field of application) This invention involves quilting a line pattern using a plurality of sewing needles that move through the throat plate while moving the fabric in the longitudinal direction and swinging it laterally in the width direction. The present invention relates to a quilting machine designed to do this, and particularly to a presser foot device thereof. (Prior art) In a conventional quilting machine of this kind, a presser spring made of a compression spring or the like is interposed between the fixed hook 1F portion of the frame and the presser plate, and the presser spring is inserted downwardly with respect to the presser plate. The pressure of the presser foot was applied. However, this work clamp plate is moved up and down between the lower working position and the upper non-working position when the machine is in operation. As the presser spring is lowered, the presser spring expands and its biasing force gradually weakens, and there is a problem in that sufficient presser pressure is not applied to the presser lambda root at the lower working position. In addition, in this conventional configuration, when the presser plate is raised to the upper non-active position, the shell of the presser spring is also compressed and the biasing force acting on the presser plate is maximized, so that the presser spring can be used even when the machine is stopped. When performing threading work on sewing needles or other inspection and maintenance work with the presser plate placed in the upper non-active position,
There was a defect in that the presser plate was lowered by the strong urging force of the presser spring. (Problems to be Solved by the Invention) The present invention solves the above-mentioned deficiencies in the prior art, and the biasing force of the presser spring is maximized when the presser plate is lowered to its working position. When the presser foot plate is raised to one inactive position, the pressing force of the presser spring is reduced, and the presser foot is held in this state. There is no fear that the board will be lowered. It is an object of the present invention to provide a presser foot device for a quilting machine that allows threading work and other inspection and maintenance work on MSt to be carried out with peace of mind. (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention includes a workpiece plate disposed in the lifting position 11 [function] on a side handling table, and a workpiece presser plate facing the direction F. The presser spring is provided with a presser spring for biasing the presser spring, and a reducing means for reducing the biasing force of the presser spring when the presser plate is lifted. (Embodiment) This embodiment will now be described in detail with reference to the drawings, as shown in FIG. As shown in FIG. 2, in the quilting machine of this embodiment, a support frame 2 is disposed and fixed on a frame l, and a t1f moving shaft 3 is supported so as to be movable in the left and right directions. A distribution roller 5 for distributing fabric 4 made of outer fabric 4a, web 4b, etc. is rotatably supported at the lower front end of movable shaft 3, and a distribution roller 5 for distributing fabric 4 made of outer fabric 4a, web 4b, etc. is rotatably supported, and on the upper surface of the central portion, a distribution roller 5 for distributing fabric 4 in the longitudinal direction is supported. A plurality of feed rollers 6 for winding the fabric 4 are rotatably supported, and a winding roller for winding the fabric 4 is rotatably supported at the rear end. As shown in FIG. 1, a driven pulley 9 and a handle 10 for manual operation are attached to the support frame 2 on the frame l. A motor 11 is provided on the left side of the frame 1, and a belt 13 is hung between a drive pulley 12 on the motor shaft and the driven pulley 9. and,
As the motor II rotates, the drive pulley 12,
The main shaft 8 is rotationally driven in one direction via the belt 3 and the driven pulley 9, and when the motor 11 is stopped, the main shaft 8 can be appropriately rotated by operating the handle 10. A feed control force J, 14 consisting of an eccentric cam is attached to the left side of the shaft 8, and the cam action is transmitted through a transmission mechanism (not shown) consisting of a cam follower, a rotating lever, a connecting rod, etc. The foot roller 6 is intermittently rotated to transport the fabric 4 in the longitudinal direction.A frame l is placed near the left side of the feed control cam 14.
A deceleration tooth 1F mechanism 15 is provided on the top. The decrease t
An approximately heart-shaped lateral vibration control force AlB that is decelerated and rotated based on the rotation of the L sleeve 8 is attached to and detached from the rear surface of the i-wheel mechanism 15.

[UF movable stopper frame that can be removed and supports the feed roller 6 through a transmission mechanism (not shown in the figure) consisting of a cam follower, a rotary lever, a connecting funnel, etc. by its cam action. 3 is reciprocated in the lateral direction, so that the fabric 4 is laterally swung in the width direction. As shown in FIGS. 1 and 4, the frame 】)- is shown in FIG. A needle plate 17 is arranged and fixed. A swing @ 18 is rotatably supported on the support frame 2 of the frame l so as to extend in the left-right direction above the copper plate 17, and a swing lever 19 is attached to the left end thereof. A sewing needle operation control cam 20, which is an eccentric cam, is fixed to the main shaft 81- in correspondence with the swing lever 13, and a ring-shaped cam follower 21 is fitted around the outer periphery of the needle operation control cam 20. Between the cam follower 21 and the swing lever 18, a connecting rod 22 and a contact f23, which can be extended and retracted (g4), are provided, and the cam follower 21. Connection rod 22, connection length 23 and swing lever 1
As shown in FIG.
Above the needle bars 7, a plurality of needle bars 24 (only one is shown) are supported on the support frame 2 of the frame 1 via support arms 25A so as to be movable up and down. At the lower end of each needle bar 24, a pair of front and rear needle mounting plates 26 are installed and supported via mounting blocks 27, and a large number of sewing needles 28 are arranged in the left and right directions on the front surface thereof. A swinging arm 28 is attached to the swinging shaft 18 near the left side of each needle bar 24, and a pair of joints 30, 31 are connected between the tip of the swinging arm 28 and the transaction block 27. A connecting rod 32 is provided which can be expanded and contracted. Then, as the main shaft 8 rotates, the sewing needle 28 is moved by one degree according to the operation characteristic curve CI as shown in FIG. 5 by the cam action of the sewing needle operation control cam 2o, and is transported in the longitudinal direction as described above. For example, a zigzag-like line as shown in Fig. 3 is provided below the copper plate 17 for the fabric 4, which is horizontally swung in the width direction. The pattern is now quilted. Near the right side of each needle bar 24, several presser bars 33 (only one is shown) are supported on the support frame 2 of the frame 1 via support arms 25B so as to be movable up and down. Said i
A fabric presser plate 34 is supported via a mounting block 35 at the lower end of each presser bar 33 so as to extend in the left-right direction above f&17, and a through hole 34a for the sewing needle 28 is formed along both front and rear edges of the presser plate 34. ing. A presser plate A lowering control cam 36 is attached to the swing shaft 18 near the right side of the presser cup 33, and a cam driven roller 37 provided at the upper end of the presser cup 33 contacts and engages with the outer peripheral surface of the L portion. There is. Then, due to the cam action of the presser plate elevation control cam 36 as the swing shaft 18 rotates, the cloth presser plate 34 is moved to the operating characteristic curve C2 as shown in FIG. ．．
The fabric 4 is held between an upper inactive position spaced away from the copper plate 17 in the 1] direction as shown in Figure 4, and a position close to the throat plate 17 as shown in Figure 6.7. It is arranged in a lower operating position. 111J Each presser bar 33 is fitted with a presser spring 38 made of a compression spring for applying downward pressure to the workpiece presser plate 34, and its lower end is attached to a spring hook Ji38 fixed on the presser bar 33. It is held in a lifted position, and its end contacts and engages with an engaging piece 40 that is loosely fitted into the presser cup 33 so as to be movable downward. Further, a hanging body 41 constituting a first stage of reduction is fixedly protruding toward the right at approximately the center of the four rods 24,
The two prongs at the distal end thereof are engaged with the engaging piece 40, and the upper end of the pressing spring 38 is engaged and held 11 by the displacement ii1 function. Then, as shown in Fig. 1.4, the presser plate 3
4 is in the upper non-active position, the pressing spring 38 is extended due to the movement of the latch unit 41 as the needle bar 24 is moved, and its biasing force is reduced. , 6th.
As shown in FIG. 7, when the presser plate 34 is lowered to the operating position on the F side, the latch 41 is moved as the needle bar 24 moves downward.
The downward movement of 2 compresses the compression spring 38 and increases its biasing force. Therefore, during operation of this quilting machine, the force J・
When the work presser plate 34 is lowered to the operating position F by the action, the biasing force of the presser spring 38 becomes maximum and a pressure of 1 minute is applied to the cloth presser plate 34, and in this state, the cloth is The fabric 4 is reliably held between the presser plate 34 and the throat plate 17, and a line pattern such as a zigzag pattern as shown in FIG. 3 can be accurately quilted on the fabric 4. or,
When the quilting machine is in a stopped state, the handle l
When the main shaft 8 is rotated by O and the presser plate 34 is raised to one of the inactive positions (shown in FIG. 1.4), the biasing force of the presser spring 38 is reduced to a minimum. Therefore, there is no fear that the presser plate 34 will be lowered in this state.
Threading work for the sewing needle 28 and other inspection and maintenance work can be performed with peace of mind. In addition, this invention further improves the above-mentioned embodiments, for example, reduction/1
It is also possible to implement the structure by arbitrarily changing the configuration of the stages. (Effects of the Invention) As described in detail below in 1-1, in this invention, when the presser plate is lowered to the lower working position, the biasing force of the presser spring is maximized and a portion of the cloth is pressed against the presser plate. Check the presser foot pressure-1
1. The presser plate can be When the force is lifted to the position where no force is applied, the biasing force of the presser spring is reduced, and there is no fear that the presser plate 7p will be lowered in this state, and threading of the sewing needle or other inspection and maintenance work can be carried out. It has excellent effects and can be performed safely.

[Brief explanation of drawings]

Figure 1 shows a quilting machine embodying this invention)
: A partial front view of the protrusion, Figure 2 is a partial side view showing almost the entire quilting machine on a reduced scale, Figure 3 is a partial enlarged sectional view taken along line A-A in Figure 1, Figure 4 is the first
FIG. 5 is a graph showing the operation of the sewing needle and presser plate, especially one curve, and FIGS.
The figure corresponds to FIGS. 1 and 4 and is a partial cross-section IA showing the operating state. l...Frame, 4...Fabric, 8...Main shaft, 14
... Feed fIll Vl force l, 1B... Lateral swing control cam, 7... Throat plate, 20... Various operation control cam, 24... Needle bar, 26... Needle installation Plate, 28... Sewing needle, 33... Presser bar, 34... Cloth presser plate, 36...
・Press plate 1, (lowering control cam, 38... presser, 41
...11 pieces that make up the mitigation means. 452Figure 3

Claims (2)

[Claims] (1) In a quilting machine that quilts a line pattern with a plurality of sewing needles that move up and down through the throat plate while moving the fabric in the longitudinal direction and swinging it laterally in the width direction, the needles A presser plate arranged to be movable up and down on the plate, a presser spring for urging the presser plate downward, and a presser spring for reducing the biasing force of the presser spring when the presser plate is raised. A presser foot device characterized in that it is equipped with a means for reducing. (2) The sewing needle is supported by the frame via the needle bar so as to be movable up and down, the presser plate is supported by the frame via the presser bar so as to be movable up and down, and the presser spring is fitted into the presser bar. A patent characterized in that the reducing means is constituted by a compression spring, and the reducing means is constituted by a latch body projecting from the needle bar so as to movably latch and hold the upper end of the compression spring. A presser foot device for a quilting machine according to claim 1.