CN1025355C - Deliver device of machine - Google Patents

Abstract

An upper feed device for sewing machines comprises a clutch mechanism which is arranged in a means for vertically moving an upper feed arm and which can stop the swinging of a vertical-feed shaft lever driven by a lever in cooperation with the lever, and a shaft ring which is arranged in a means for vertically moving an upper feed gear and which is fixed on the vertical-feed shaft. When the shaft ring rotates upward, the shaft ring can couple with the lower end of a rod abutted adjustably on a machine frame at a mounting position, thereby limiting the rotation of the shaft ring below a certain limit. When the upper feed gear moves vertically or horizontally to form an elliptic motion, the lower part of the elliptic motion trail is cut at the desired height, thereby increasing the feeding efficiency of the upper feed gear and simultaneously preventing the damage to fabrics due to the increase in holding force of the vertical-feed gear.

Description

Deliver device of machine

The present invention relates to the feed arrangement of Sewing machines, specifically, relate to carry out carrying out together the feed arrangement of the Sewing machines of cloth feeding by feeding tooth that moves forward and backward and move up and down the oval four directions motion that constitutes and following feeding tooth.

The feed arrangement of known Sewing machines in the past, its by the crank of doing in linkage with main shaft to rock back and forth, base portion can be along the vertical direction rotationally by pivot suspension on crank and free end have the feeding tooth relative with following feeding tooth advancement arm, work the spring assembly of depressing the advancement arm effect, shake as above-below direction in linkage and join with the advancement arm of depressing by spring assembly with main shaft, the crank that advancement arm is moved up and down constitutes.In addition, putting down in writing in the mechanism that advancement arm is moved up and down in the open clear 63-21513 of communique of Japan Patent, installing clutch mechanism, its by the pawl that is fastened on the axle collar on the axis of rocking and be bearing in pivotally lever on the axis of rocking pawl constituted.And being embedded in by advancement arm and being attached in the formed guiding groove of guide member on the advancement arm at the running roller on the crank-pin of the crank that advancement arm is done move up and down by pivotal support.

In these above-mentioned devices, in the way that feeding teeth directional bottom dead centre descends, touch the cloth on the needle plate, and when stoping later decline, in a kind of in front device, crank-pin leaves advancement arm and has in the sort of device of clutch mechanism, the pawl of lever leaves the pawl of the axle collar, the crank-pin that leaves from advancement arm arrives counter-rotating after bottom dead center, when connecting advancement arm and promote once more, or the pawl of lever leaves on the pawl and then connection of the axle collar, when promoting advancement arm, the feeding tooth rises on the cloth charge level on the needle plate.At this moment, the cloth on feeding tooth and the needle plate engages just, carries out the cloth feeding.Fig. 5 is the track schematic diagram of feeding tooth.The A point that descends and to engage at the feeding tooth with cloth on the needle plate, cloth on the needle plate is risen in the interval that B orders carry out the cloth feeding, horizontal line AB represents the amount of feeding of cloth, in the figure, make the position that engages the feeding tooth on the cloth descend, when carrying out the cloth feeding by the position shown in the line segment CD, feeding efficient, be that the amount of feeding of cloth can increase, but deepen with the interlock of the following feeding tooth that rises, the impact chucking power of cloth is strengthened, thereby will on cloth, produce the feeding scar that causes by feeding tooth and following feeding tooth and the problem of profile of tooth.

In order to address this problem, disclosing the guide channel trench culture that crank-pin is chimeric in the clear 63-55972 of Japanese Utility Model patent disclosure communique is the structure that is reduced impulsive force by the cam slot of the formed special shape of flat spring, but the fabrication and processing of cam slot is difficult.

The purpose of this invention is to provide a kind of simple structure of using, can improve the feeding efficient of feeding tooth, and to the feed arrangement of cloth less than the damage that causes by the feeding tooth.

The object of the present invention is achieved like this, and the feed arrangement of this Sewing machines is that the up-down mechanism by advancement arm and advancement arm constitutes; The cardinal extremity of advancement arm is connected on the crank that a work rocks back and forth, and front end is installed with the feeding tooth; Above-mentioned up-down mechanism contains with main shaft makes the crank that fluctuates in linkage, and be that the interlock between main shaft and advancement arm is blocked, it is characterized in that, it is to be configured in the movable range of the member that moves up and down in the up-down mechanism being bearing in the block that is provided with on the end of the bar on the sewing machine frame, perhaps be configured on any member of up-down mechanism, in the movable range of the part in addition that moves up and down, thereby the motion of above-mentioned member or other part is limited in certain qualification, stops the feeding tooth to carry out a certain amount of above decline.

Purpose of the present invention can also realize further by the following technical programs that in the described device, bar is that the position can be bearing on the sewing machine frame with adjusting, and described feeding tooth is highly can be installed on the advancement arm with regulating.

Use feed arrangement of the present invention, when the feeding tooth carries out front and back and move up and down oval-shaped cubic the moving that is constituted,, make it roughly be the horizontal line state with stoping lowering means that the bottom of elliptical orbit is cut away by needed height.

Because the rising of the down position of feeding tooth and can not fully carry out feeding the time, regulate the upper-lower position that is installed in the feeding tooth on the advancement arm and get final product.Like this, just can or be adjusted to arbitrarily under the down position situation, needed height is cut in the bottom of elliptical path at the down position that does not change the feeding tooth.

Join member or part on the block of the present invention to, it for example is the stopper element that constitutes the pawl of the axle collar that is fixed on the clutch mechanism on the axis of rocking or be installed in axis of rocking in addition, in this case, preferably barre is made the change installation site and just can be adjusted the such structure of stop location.

This device constitutes as described above, carry out when the pawl 97 of the axle collar 89 upwards rotates, engaging by the feeding tooth that moves forward and backward and move up and down the oval four directions motion that constitutes as shown in Figure 3, Figure 4 with the block of rod end, stop after it rotates, roughly along the orbiting motion of level.The same length of whole amount of exercise GH on the fore-and-aft direction of EF and feeding tooth 87 between this feeding active region, thereby can carry out the feeding of cloth with high feeding efficient.And, the time, adjustment screw 75 breaks away from pawl 79.The elastic force of spring 81 can be regulated by the overhang that changes it by screwing in adjustment screw 75.

Crank 73 is made and is made guide bar 85 rotationally by pivot suspension, by shaking of crank 73 advancement arm 83 is moved up and down, guide bar 85 has advancement arm 83 and is embedded in wherein guiding groove 84 slidably, front end at advancement arm 83 is installed with feeding tooth 87 by vertical slotted hole, and is mounted to by the screw 88 that screws in advancement arm 83 and can adjusts its position.

As shown in Figure 3, contact with the pawl 97 of the axle collar 89 fixing bar 93 lower ends that the axle collar 89, installation site can be bearing on the sewing machine frame 91 with adjusting by screw 90 on the vertical feed axle 67, is the axle collar 89 that the rotation of crank 73 is placed restrictions on below certain limit, and feeding tooth 87 is not dropped to below the height of regulation.With the block of bar lower end constitute together the axle collar 89 that stops the device that crank 73 and feeding tooth descend pawl 97, can utilize the pawl 79 of the axle collar 77 to replace, also can use the axle collar 77 or be contained in part on the vertical feed axle in addition.

Moving up and down as described above of feeding tooth 87 carried out, and its to move forward and backward be to be rocked back and forth by the crank 99 by pivot suspension advancement arm 83 to carry out.

The aforesaid structure of device of the present invention moves forward and backward and the formed oval cubic feeding tooth that moves of lifting moving, as shown in Figure 4, when the pawl 97 of the axle collar 89 upwards rotates, it is bonded on the block of bar lower end, stops after its rotation, roughly moves along horizontal trajectory.The length amount GH of the whole motion of fore-and-aft direction of EF and feeding tooth 87 between this feeding active region is roughly the same, thereby can carry out high efficiency cloth feeding.Even improved feeding efficient, even because feeding tooth 87 can not drop to the feeding efficient of regulation improves, feeding tooth 87 also can not drop to below the height of regulation, so and the interlock of following feeding tooth can not deepen yet, so can the hurt cloth.

Below in conjunction with accompanying drawing embodiments of the invention are described.

Fig. 1 is the feed arrangement oblique view of Sewing machines of the present invention.

Fig. 2 is in the feed arrangement shown in Figure 1, makes the exploded perspective view of advancement arm reciprocating mechanism.

Fig. 3 is the profile of feed arrangement shown in Figure 1.

Fig. 4 is the movement profiles of feeding tooth of the feed arrangement of Sewing machines of the present invention.

Fig. 5 is the movement profiles of former feeding tooth.

Figure number is described as follows:

61-fovea superior profile shaft, 67-vertical feed axle, 79, the 97-pawl, 77, the 89-axle collar, 71-clutch mechanism, 73, the 99-crank, 83-advancement arm, 87-feeding tooth, 69-lever, 75-adjustment screw, 81-C type spring, 85-guide bar, 93-bar.

As shown in Figure 1, feed arrangement be be fixed on (with reference to Fig. 2) on the fovea superior profile shaft 61 thus shaking of matrix bar 63 pass to the lever 69, the lever 69 that are supported on rotationally on the vertical feed axle 67 by bar 65 and by clutch mechanism 71 shaking of it passed to vertical feed axle 67 and shake the crank 73 that is fixed on this axle head.

As shown in Figure 2, clutch mechanism 71 is by the adjustment screw 75 that screws in lever 69, vertical feed axle 67, pawl 79, fixed lever 69 and the axle collar 77 by the fixing axle collar 77 of screw 68, and the jag of adjustment screw 75 is pressed in C type spring 81 on the pawl 79 of the axle collar 77 constitutes, when the axle collar 77 is in inactive state, make the effect of lever 69 antagonistic springs 81 and rotate below the height, so can not deepen with the interlock of following feeding tooth, therefore can not damage cloth.

As mentioned above, because the present invention is configured in block in the movable range of the member that moves up and down or constitutes in the movable range of the part of being adorned on any member of up-down mechanism in addition that moves up and down, the bottom of feeding tooth elliptical orbit is cut away by desired height, so can improve feeding efficient, promptly can increase the amount of feeding of cloth, even improved feeding efficient, because the feeding tooth can not drop to below the height of regulation, so can prevent because the feeding tooth increases the feeding damage that is produced to the chucking power of cloth increases.

In addition,, just can regulate the height of the down position of feeding tooth, change feeding efficient if having the adjustable words in installation site of the bar of block.

In addition, in the adjustable device of the height of feeding tooth,, still the down position of feeding tooth can be adjusted to arbitrarily on the height even the bottom of elliptical orbit is cut away according to needed height.

Claims (3)

1, a kind of feed arrangement of Sewing machines is that the up-down mechanism by advancement arm and advancement arm constitutes; The cardinal extremity of advancement arm is connected on the crank that a work rocks back and forth, and front end is installed with the feeding tooth; Above-mentioned up-down mechanism contains with main shaft makes the crank that fluctuates in linkage, and be that the interlock between main shaft and advancement arm is blocked, it is characterized in that, it is to be configured in the movable range of the member that moves up and down in the up-down mechanism being bearing in the block that is provided with on the end of the bar on the sewing machine frame, perhaps be configured on any member of up-down mechanism, in the movable range of the part in addition that moves up and down, thereby the motion of above-mentioned member or other part is limited in certain qualification, stops the feeding tooth to carry out a certain amount of above decline.

2, the feed arrangement of Sewing machines according to claim 1 is characterized in that bar is that the position can be bearing on the sewing machine frame with adjusting.

3, the feed arrangement of Sewing machines according to claim 1 is characterized in that the feeding tooth is highly can be installed on the advancement arm with regulating.

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