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Feeding device for sewing machine

A technology of feeding device and sewing machine, which is applied in the direction of sewing machine components, sewing equipment, cloth feeding mechanism, etc., can solve the problems such as poor workability of differential ratio adjustment, and achieve the effect of increasing output angle and increasing output angle difference

Inactive Publication Date: 2007-06-13
MORIMOTO MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, there is a problem that when switching the mounting position of the connecting link 76, the screws 79 need to be detached one by one, and the differential ratio adjustment workability is poor.

Method used

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  • Feeding device for sewing machine
  • Feeding device for sewing machine
  • Feeding device for sewing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] In Embodiment 1, the above-mentioned intermediate portion P is set at the connection point portion 37 of the second differential feed link 36 and the second differential feed arm 34 , and is connected with the differential feed adjustment. The connecting point portion 38 of the lever 40 is shifted closer to the position P1 of the connecting point portion 37 of the second differential feed arm 34 than the central position P3 on the line L of the connecting point portion 38 .

[0064] Therefore, as shown in Figure 9, when the support shaft 45 is at position A; when the differential feed adjustment lever 44 as shown in Figure 6 is at position A[1:0.6], if the main feed shaft 3 is only swung by 35° , the differential feed shaft 4 only swings 1.37°, if the main feed shaft 3 only swings 45°, the differential feed shaft 4 only swings 3.19°. That is, when the pivot 45 is at the A position and the rotation angle (input angle) of the main feed shaft 3 is 10°, the swing angle of t...

Embodiment 2

[0068] In Example 2, the above-mentioned intermediate portion P is set on the second differential feed link 36 in a direction away from the main feed shaft 3 and the differential feed shaft 4 compared with the above-mentioned line L. In addition, it is the same as that of Embodiment 1 (the position of the main feed shaft 3, the position of the differential feed shaft 4, the position of the differential feed adjustment shaft 43, the swing start of the main feed shaft 3 position, the swing start position of the differential feed shaft 4 , the positions A and B of the support shaft 45 , the first and second differential feed arms 33 and 34 , etc.) are implemented in the same manner.

[0069] Therefore, the same as the case of Embodiment 1, as shown in Figure 10, when the fulcrum 45 is at position A; when the differential feed adjustment lever 44 as shown in Figure 6 is at position A[1:0.6], if the main The feed shaft 3 only swings 35°, and the differential feed shaft 4 only swing...

Embodiment 3

[0073] In Example 3, the same implementation as in Example 1 was performed except that the middle portion P was set at the center position P3 on the line L of the second differential feed link 36 .

[0074] Therefore, the same as the case of Embodiment 1, as shown in Figure 11, when the fulcrum 45 is at position A; when the differential feed adjustment lever 44 as shown in Figure 6 is at position A[1:0.6], if the main The feed shaft 3 only swings 35°, and the differential feed shaft 4 only swings 1.16°. If the main feed shaft 3 only swings 45°, the differential feed shaft 4 only swings 3.10°. That is, when the pivot 45 is at the A position and the rotation angle (input angle) of the main feed shaft 3 is 10°, the swing angle of the differential feed shaft 4 is 3.10°+1.16°=4.26°.

[0075]When the support shaft 45 is at the position D; the differential feed adjustment lever 44 is at the position D[1:1.8], if the main feed shaft 3 only swings 35°, the swing angle of the differenti...

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PUM

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Abstract

The invention supplies sewing machine feeding device differential feed regulating mechanism and direction differential feed shaft diving mechanism which can enlarge differential ratio range. The former has differential feed regulating connecting rod of which one end is movably supported by fulcrum. One end of the first differential feed connecting rod of the latter is jointed with the middle part of the connecting points which respectively are the second differential feed connecting rod and arm, another end of the differential feed regulating connecting rod. Thus, the invention can change the swinging angle difference of the differential feed shaft even more, and enlarge the differential ratio range even if the angle of adjustment is the same.

Description

technical field [0001] The present invention relates to a feed device of a sewing machine having main feed teeth and differential feed teeth for feeding a sewing object, and more specifically relates to a sewing machine that is compactly accommodated in a limited space inside a sewing machine through improvement. The transmission mechanism to the differential feed shaft and the differential feed adjustment mechanism have been installed, and the feed device of the sewing machine can obtain an effective differential ratio with simple differential adjustment operations. technical background [0002] Conventionally, a sewing machine having a differential adjustment mechanism for performing sewing corresponding to stretched cloth and non-stretched cloth is widely known. As the feeding device of this sewing machine, for example, as shown in FIGS. 66, the differential feed shaft 63 and the main feed shaft 62 swing around each axis in order to make the differential feed teeth 61 an...

Claims

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Application Information

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IPC IPC(8): D05B27/08
Inventor 细川真人村上智纪
Owner MORIMOTO MFG
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