TWI598485B - Sewing machine feed dog feed device - Google Patents

Description

Feeding tooth feed device of sewing machine

The present invention relates to a feed tooth feeding device for a sewing machine, and more particularly to a feed tooth feeding device for slightly adjusting the displacement distance between the first feed dog bar and the second feed dog bar.

According to the high development of the textile industry technology, various garment materials that are different from traditional fabrics are gradually developed and manufactured. In addition, due to the improvement of social and economic standards, people are increasingly demanding their own clothing materials and shapes. Therefore, in order to cope with the design complexity of today's clothing, the structural design of the sewing machine itself must also be improved.

Specifically, in order to change the sewing thread spacing of the sewing machine (commonly known as the thick and thin needles) in response to the design of various types of clothes, the conventional sewing machine has a structural design with a single feed tooth, so that during the use of the sewing machine The travel distance of the feed dog can be adjusted to change the size of the cloth movement, so that the sewing machine can form a sewing pitch of different sizes on the cloth due to the amount of movement of the cloth. However, as the design complexity of the clothes is increasing, the above-mentioned sewing machine with a single feed tooth is not enough to cope with the sewing work of today's clothing design. Therefore, the sewing machine manufacturer has also developed a front feed tooth and a rear. The sewing machine for feeding the teeth enables the sewing machine to perform the function of adjusting the sewing line spacing by the back feeding teeth by the back feeding teeth, and the cloth feeding amount is transmitted to the back feeding teeth through the front feeding teeth. The similarities and differences (commonly known as the differential ratio) are used to create a flat or wrinkled appearance of the fabric after sewing, in order to meet the design of the various types of clothing.

For example, the Republic of China Patent Publication No. M384199 discloses an external adjustment feed adjustment mechanism comprising an adjustment plate, an adjustment lever, a linkage mechanism, a rocking member and a front moving tooth linkage rod. The adjusting plate has a through hole and a limiting mechanism, and the limiting mechanism forms a moving space. The adjusting lever has a joint portion and a trigger portion. The joint portion is correspondingly disposed in the through hole, and the trigger portion is disposed in the moving space. One end of the linkage mechanism is disposed on the through hole and fixedly coupled to the joint portion, and the rocking member is coupled to the linkage mechanism, and the front moving tooth linkage rod is coupled to the rocking member. Accordingly, when the external adjustment feeding adjustment mechanism is in practical application, the user needs to rotate the pulling portion to drive the linkage mechanism to be coupled with the shaking member, and then adjust the angle of the shaking member to adjust the front moving tooth. The horizontal reciprocating displacement of the linkage rod is used to change the amount of cloth to be fed for the sewing machine to perform the sewing operation.

Further, the Patent Publication No. 201508122 of the Republic of China discloses a feeding mechanism for an arm type sewing machine having a cylinder, a machine table and an arm, the feeding mechanism having a main body Feeding table, a first differential feed table, a second differential feed table, a main feed tooth, a first differential feed tooth, a second differential feed tooth, and a first difference The dynamic feed amount adjustment mechanism, a second differential feed amount adjustment mechanism, and a main differential feed amount adjustment mechanism. The main feed table, the first differential feed stage, and the second differential feed stage are disposed side by side in the cylinder, and the main feed teeth are mounted on the front end of the main feed stage. The first differential feed tooth is mounted on the front end of the first differential feed stage, and the second differential feed tooth is mounted on the front end of the second differential feed stage. Further, when the arm type sewing machine is used in combination with the feeding mechanism, the main differential feed amount adjusting mechanism can adjust the amount of movement of the main feed tooth and the main feed table in the front-rear direction (below The first differential feed amount adjustment mechanism can be used to adjust the first differential feed tooth and the amount of movement of the first differential feed stage in the front-rear direction (hereinafter referred to as the first differential Feeding amount), the second differential feed amount adjusting mechanism can be used to adjust the amount of movement of the second differential feed tooth and the second differential feed table in the front-rear direction (hereinafter referred to as a second differential feed) In this way, the arm type sewing machine can generate the cloth after the sewing by the difference between the main feed amount, the first differential feed amount and the second differential feed amount. A flat or wrinkled look.

However, it can be clearly seen from the foregoing prior art that although the adjusting mechanism of the M384199 patent can adjust the horizontal reciprocating displacement of the front moving tooth linkage lever by the angle of the rocking member, the adjusting mechanism cannot The overall displacement stroke adjustment is performed for the front moving tooth linkage rod and the rear movement tooth linkage rod. On the other hand, the feeding mechanism of the 201508122 patent can be separately adjusted only by the main differential feed amount adjusting mechanism, the first differential feed amount adjusting mechanism, and the second differential feed amount adjusting mechanism. The main feed amount, the first differential feed amount, and the second differential feed amount, the feed mechanism is also unable to feed the main feed amount, the first differential feed amount, and the second difference The amount of dynamic feed is adjusted together. Furthermore, it can be seen from the technical content of the 201508122 patent that the feed mechanism is provided with the main differential feed amount adjustment mechanism, the first differential feed amount adjustment mechanism, and the second differential The feed amount adjustment mechanism produces a situation in which the design structure is too complicated.

The main object of the present invention is to solve the problem that the displacement distance adjustment cannot be performed for the front moving tooth and the rear moving tooth and the design structure is too complicated in the conventional embodiment.

In order to achieve the above object, the present invention provides a feed tooth feeding device for a sewing machine, the feed tooth feeding device comprising a first feed dog gear, a second feed gear bar, a rocking member, and a first sending a cloth push-pull rod, a second feed dog push-pull rod, a shaft-turning drive member, a double-axis conductive rod, a pitch adjusting member and a transmission link. The first feed dog bar and a second feed dog bar disposed alongside the first feed dog bar. The rocking member is axially connected to a rocking member fixing shaft, and the first rocking member and the second rocking member are respectively disposed on two sides of the rocking member. The first feed dog push-pull rod is pivotally connected to the middle portion of the first feed dog shaft, and the other end is pivotally connected to the first rocker. The first feed tooth push-pull rod is pivotally connected to the first torque shaft. Puller. The second feed dog push-pull rod is pivotally connected to the middle portion of the second feed rack, and the other end is pivotally connected to the second rocker. The second feed dog push-pull rod is pivotally connected to the second torque shaft. Puller. The shaft rotation drive member is axially coupled to a drive member fixed shaft and has an arm. The two-axis conductive rod is pivotally connected to the first rocker at one end, and the other end is sleeved on the arm by a guiding member. The pitch adjusting member is pivotally connected to the driving member fixing shaft, and is forced to rotate the driving member fixing shaft. The transmission link includes a first support rod and a second support rod. The first support rod is pivotally connected to the drive member fixing shaft, and the other end is connected to the second support rod. The second support rod is not connected to the second support rod. One end of the first rod connection is pivotally connected to the middle portion of the biaxial conductive rod, and the transmission link is driven by the pitch adjusting member to adjust a front-rear displacement distance of the first feed dog rack and the second feed rack rod.

In one embodiment, the pitch adjusting member has a disk body, a plurality of ribs disposed on a side of the disk body facing the rotating shaft driving member, a pair of fixing rods corresponding to the ribs, and a fixing rod disposed on the fixing rod A side away from the side of the disc body and supporting the fixing rod to the elastic member between the two ribs. Further, the pitch adjusting member has a scale provided on a side of the disc body away from the rotating shaft driving member. Specifically, the ribs are each a ratchet.

In one embodiment, the guiding member has a first component, a second component assembled with the first component, and a body formed between the first component and the second component for the arm to be worn. Connecting port.

In one embodiment, the first feed dog bar has a first feed dog tooth and the second feed dog gear bar has a second feed dog tooth. Further, a first linkage shaft trigger is connected to one end of the first torque shaft trigger rod, and the first linkage shaft trigger rod is disposed with a first dial and is fixed to a first feed dog adjustment rod. . Specifically, one end of the second torque shaft trigger is connected with a second linkage shaft, and the second linkage shaft is disposed with a second dial and a second feed adjustment rod. Pick up. More specifically, the sewing machine has a transmission main shaft, a first lifting rod and a second lifting rod, the transmission shaft has a first eccentric shaft portion and a second eccentric shaft portion, and the first lifting rod has two end shafts The first eccentric shaft portion and the shaft rotation driving member are connected to the second eccentric shaft portion and the second feed dog shaft.

Through the above embodiments of the present invention, the following features are compared with the conventional ones:

According to the present invention, the driving member fixing shaft drives the first rod to rotate through the pitch adjusting member, so that the first rod links the second rod to drive the two-axis conducting rod to face the clockwise clockwise direction Or rotating in a counterclockwise direction, so that the sewing machine can limit the front and rear displacement distances of the first feed dog rack and the second feed dog rack when the guide member is at different positions of the arm Adjusting the amount of the first feed dog bar and the second feed dog bar to the cloth by a slight adjustment, thereby solving the problem that the displacement distance adjustment cannot be performed for the front moving tooth and the rear moving tooth in the conventional embodiment. And the design structure is too complicated.

The detailed description and technical contents of the present invention will now be described as follows:

Referring to FIGS. 1 to 4, the present invention provides a feed dog feed device for a sewing machine, and the feed dog feed device 1 is disposed inside the sewing machine 2. The feed dog feed device 1 includes a first feed dog bar 11, a second feed dog bar 12, a rocking member 13, a first feed dog push-pull rod 14, and a second feed dog push-pull rod. 15. A shaft rotation drive member 16, a dual shaft transmission rod 17, a pitch adjustment member 18, and a transmission link 19. The first feed dog bar 11 is disposed alongside the second feed dog bar 12, the first feed dog bar 11 is provided with a first feed tooth 111 at the end, and the second feed dog bar 12 is provided with a first end Two feed teeth 121. In addition, the two sides of the rocking member 13 respectively have a first rocker 131 and a second rocker 132. The first rocker 131 is parallel to the second rocker 132, and the rocking member 13 is axially connected to the first rocker 132. The rocking member fixed to the sewing machine 2 fixes the shaft 133 such that the rocking member 13 is pivoted by the rocking member fixing shaft 133 for front and rear swinging. On the other hand, one end of the first feed dog push-pull rod 14 is pivotally connected to the middle of the first feed dog rack 11 , and the other end is pivotally connected to the first rocker 131 . The second feed dog push-pull rod 15 is pivotally connected to the middle of the second feed rack 12 and the other end is pivotally connected to the second rocker 132. In detail, the rocking member 13 has a first rail 134 disposed on the first rocker 131 and a second rail 135 disposed on the second rocker 132. The first feed dog push-pull rod 14 has a The first slider 141 is disposed in the first rail 134, and the second feed dog push-pull rod 15 has a second slider 151 disposed in the second rail 135. Further, a middle portion of the first feed dog push-pull rod 14 is pivotally connected with a first moment type shaft trigger rod 142, and a middle portion of the second feed dog push rod 14 is pivotally connected with a second torque type shaft trigger rod 152.

Referring to FIG. 1 to FIG. 4, the shaft rotation driving member 16 has an arm 161. The shaft rotation driving member 16 is axially coupled to a driving member fixing shaft 162 fitted in the sewing machine 2. The driving member 16 is pivoted by the driving member fixing shaft 162 as an axis. The biaxial conductive rod 17 has a guiding member 171. One end of the biaxial conducting rod 17 is pivotally connected to the first rocking rod 131, and the other end is sleeved with the guiding member 171. In one embodiment, the guiding member 171 is formed by a first component 172 and a second component 173. The first component 172 is axially coupled to the biaxial conductive rod 17, and the first component The second member 173 is assembled with the second member 173 to form a communication port 174 through which the arm 161 is bored. In addition, the pitch adjusting member 18 is pivotally connected to a side of the driving member fixing shaft 162 away from the first feeding rack 11 , and the pitch adjusting member 18 is forced to rotate the driving member fixing shaft 162 . Specifically, the pitch adjusting member 18 has a disk body 181, a plurality of ribs 182, a fixing rod 183, and an elastic member 184. The ribs 182 are disposed on the disk body 181 facing the rotating shaft driving member 16. On one side, the fixing rod 183 corresponds to the shape of the ribs 182. The elastic member 184 supports the fixing rod 183 to fix at least one of the ribs 182. In one embodiment, the ribs 182 are respectively a ratchet, and the fixing rod 183 is embedded between any of the ratchet teeth corresponding to the shape of the ratchets (ie, the ribs 182). On the other hand, the transmission link 19 has a first support rod 191 and a second support rod 192. The first support rod 191 is pivotally connected to the driving member fixing shaft 162 and the other end is pivotally connected to the second rod. 192. One end of the second strut 192 that is not connected to the first strut 191 is pivotally connected to the middle of the biaxial conductive rod 17.

Further, referring to FIG. 1 to FIG. 5, at the beginning of the implementation, the sewing machine 2 has a transmission main shaft 21, a first lifting rod 22 and a second lifting rod 23, as shown in FIG. 2 and FIG. The main shaft 21 has a first eccentric shaft portion 211 and a second eccentric shaft portion 212. The first lifting rod 22 is axially coupled to the first eccentric shaft portion 211 and the shaft rotation driving member 16, and the second lifting rod The two end shafts are connected to the second eccentric shaft portion 212 and the second feed dog bar 12 . The driving spindle 21 drives the first lifting rod 22 and the second lifting rod 23 to act when the feeding device 1 and the sewing machine 2 are actually used. At this time, the second lifting rod 23 pivotally connected to the second eccentric shaft portion 212 interlocks the second feeding rack 12 to be displaced back and forth to bring in a cloth (not shown). Simultaneously, the first lifting rod 22 pivotally connected to the first eccentric shaft portion 211 drives the shaft driving member 16 to swing up and down, and the arm 161 is reciprocally displaced in the communication port 174 to interlock the biaxial conduction. The rod 17 drives the first rocker 131 to swing, and the rocking member 13 is oscillated with the first rocker 131 to interlock the first slider 141 to move in the first rail 134, thereby causing the first feed tooth to be displaced. The push-pull rod 14 is interlocked with the first feed dog bar 11 by the displacement of the first slider 141 in the first rail 134 to be brought into the cloth. Accordingly, the sewing machine 2 can cause the first feed dog 111 and the second feed dog 121 to be brought into the cloth by the above operation to perform the sewing work on the cloth.

Wherein, if the user wants to adjust the amount of the cloth to be fed, the feed tooth feeding device 1 can be changed by rotating the first torque shaft trigger 142 or the second torque shaft trigger 152. The displacement travel distance of the first feed dog bar 11 or the second feed dog bar 12 is such that the amount of the cloth is greatly increased or decreased. In one embodiment, as shown in FIG. 2 to FIG. 4 , a first feed dog adjustment lever 143 is disposed at one end of the first torque shaft trigger lever 142 , and the first feed dog adjustment lever 143 is disposed through the first feed dog adjustment lever 143 . A second indexing plate 144 is disposed at one end of the second torque shaft triggering rod 152, and a second feeding gear adjusting rod 153 is disposed through the second feeding plate 154. Accordingly, the user can quantize the adjustment operation of the displacement distance between the first feed dog bar 11 and the second feed dog bar 12 by the first dial 144 and the second dial 154. However, the applicant of the present invention has described the respective adjustment actions of the displacement distance of the first feed dog bar 11 and the second feed dog bar 12 in the Patent No. I304106 of the Republic of China. Narration.

In detail, the main technical point of the present invention is that the feed dog feed device 1 can adjust the first feed dog bar 11 and the second feed dog bar 12 together by the pitch adjustment member 18. The distance between the front and back. When the user rotates the pitch adjusting member 18, as shown in FIG. 4, FIG. 6, and FIG. 7, the pitch adjusting member 18 drives the driving member fixing shaft 162 to rotate the first rod 191. The first strut 191 interlocks the second strut 192 to rotate the biaxial conductive rod 17 in a clockwise or counterclockwise direction with the arm 161 as a circumference. In this way, the sewing machine 2 can limit the first feed dog rack 11 and the second feed dog bar 12 before and after the operation by the different positions of the guide member 161 at the arm 161. The displacement distance is used to slightly adjust the amount of the first feed dog rack 11 and the second feed dog bar 12 to the cloth, thereby solving the problem that the front moving tooth and the rear moving tooth cannot be combined in the conventional embodiment. The problem of the displacement distance adjustment and the design structure is too complicated.

Further, in view of the fact that the feed dog feeding device 1 of the present invention can adjust the distance between the first feed dog rack 11 and the second feed dog bar 12 through the pitch adjusting member 18, In order to make the adjustment operation of the first feed dog rack 11 and the second feed rack 12 forward and backward, the pitch adjustment member 18 is further disposed away from the disk body 181. The scale table 185 on the side of the spindle drive member 16 is as shown in FIG. 2 to FIG. 4, so that the feed dog feed device 1 can quantize the first feed dog rack by the scale table 185. 11 and the position of the second feed rack 12 are adjusted to make the adjustment movement of the first feed rack 11 and the second feed rack 12 back and forth more precise.

The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Variations and modifications are still within the scope of the patents of the present invention.

1‧‧‧Feed feed device
11‧‧‧First delivery gear
111‧‧‧The first delivery tooth
12‧‧‧Second feed rack
121‧‧‧second feed teeth
13‧‧‧Shake
131‧‧‧First rocker
132‧‧‧Second rocker
133‧‧‧Shake fixed shaft
134‧‧‧First track
135‧‧‧second track
14‧‧‧First feed dog push rod
141‧‧‧First slider
142‧‧‧First torque shaft puller
143‧‧‧First feed adjustment lever
144‧‧‧First dial
15‧‧‧Second feed tooth push-pull rod
151‧‧‧Second slider
152‧‧‧Second torque shaft puller
153‧‧‧Second feed dog adjustment lever
154‧‧‧second scale
16‧‧‧Axis rotation drive
161‧‧‧ Arm
162‧‧‧Driver fixed shaft
17‧‧‧Double-axis conduction rod
171‧‧‧ Guides
172‧‧‧ first part
173‧‧‧ second part
174‧‧‧Connecting port
18‧‧‧Pitch adjustment
181‧‧‧ dish
182‧‧‧ rib
183‧‧‧Fixed rod
184‧‧‧Flexible parts
185‧‧‧ scale
19‧‧‧Drive connecting rod
191‧‧‧First pole
192‧‧‧second pole
2‧‧‧Sewing machine
21‧‧‧ drive spindle
211‧‧‧First eccentric shaft
212‧‧‧Second eccentric shaft
22‧‧‧First lifting rod
23‧‧‧Second lifting rod

Figure 1 is a perspective view of the application of the present invention. Figure 2 is a perspective view of the present invention. Figure 3 is a perspective view of another perspective of the present invention. Figure 4 is an exploded perspective view of the feed dog feed device of the present invention. Figure 5 is a side cross-sectional view (I) of the application of the present invention. Figure 6 is a side cross-sectional view (ii) of the application of the present invention. Figure 7 is a side cross-sectional view (3) of the application of the present invention.

11‧‧‧First delivery gear

111‧‧‧The first delivery tooth

12‧‧‧Second feed rack

121‧‧‧second feed teeth

13‧‧‧Shake

131‧‧‧First rocker

132‧‧‧Second rocker

133‧‧‧Shake fixed shaft

134‧‧‧First track

14‧‧‧First feed dog push rod

141‧‧‧First slider

142‧‧‧First torque shaft puller

143‧‧‧First feed adjustment lever

144‧‧‧First dial

15‧‧‧Second feed tooth push-pull rod

154‧‧‧second scale

16‧‧‧Axis rotation drive

161‧‧‧ Arm

162‧‧‧Driver fixed shaft

17‧‧‧Double-axis conduction rod

171‧‧‧ Guides

172‧‧‧ first part

173‧‧‧ second part

174‧‧‧Connecting port

18‧‧‧Pitch adjustment

181‧‧‧ dish

182‧‧‧ rib

183‧‧‧Fixed rod

184‧‧‧Flexible parts

19‧‧‧Drive connecting rod

191‧‧‧First pole

192‧‧‧second pole

Claims (8)

A feed tooth feeding device for a sewing machine, comprising: a first feed dog bar and a second feed dog bar disposed alongside the first feed dog bar, the first feed dog bar having a first a second feed dog bar having a second feed tooth; a rocking member coupled to a rocker fixing shaft, the first rocker and the second rocker respectively disposed on two sides of the rocking member a first feed dog push-pull rod, one end of which is pivotally connected to the middle portion of the first feed dog shaft, and the other end is pivotally connected to the first rocker, the first feed tooth push-pull rod is pivotally connected with a first a torque-type shaft pull rod; a second feed tooth push-pull rod, one end is pivotally connected to the middle portion of the second feed rack, and the other end is pivotally connected to the second rocker, the second feed tooth push-pull rod middle pivot A second torque shaft puller is connected; a shaft rotation drive member is coupled to a drive member fixed shaft and has an arm; a double shaft conductive rod, one end is pivotally connected to the first rocker, and the other end is The guiding member is sleeved on the arm; a pitch adjusting member is pivotally connected to the driving member fixing shaft, and is forced to rotate the driving member fixing shaft; and The movable link includes a first strut and a second strut, the first strut is pivotally connected to the driving member fixed shaft, and the other end is connected to the second strut, and the second strut is not One end of the first rod connection is pivotally connected to the middle portion of the biaxial conductive rod, and the transmission link is driven by the pitch adjusting member to synchronously adjust the front and rear displacement distances of the first feed dog rack and the second feed rack rod . The feed tooth feeding device of the sewing machine of claim 1, wherein the pitch adjusting member has a disk body, a plurality of ribs disposed on a side of the disk body facing the rotating shaft driving member, and a pair of Rib fixing rod And an elastic member disposed on a side of the fixing rod away from the disc body and supporting the fixing rod to the ribs. The feed dog feed device of the sewing machine according to claim 2, wherein the pitch adjuster has a scale provided on a side of the disk body away from the spindle drive member. The feed dog feed device of the sewing machine of claim 3, wherein the ribs are each a ratchet. The feed dog feed device of the sewing machine of claim 1, 2, 3 or 4, wherein the guide member has a first member, a second member assembled with the first member, and a A communication port is provided between the first member and the second member for the arm to pass through. The feed dog feed device of the sewing machine of claim 1, wherein one end of the first torque shaft puller is connected with a first linkage shaft puller, and the first linkage shaft puller is firstly disposed. The dial is fixed to a first feed dog adjustment lever. The feed dog feed device of the sewing machine of claim 6, wherein one end of the second torque type shaft puller is connected with a second linkage shaft puller, and the second linkage shaft pull rod is disposed with a second The dial is fixed to a second feed dog adjustment lever. The feed dog feed device of the sewing machine of claim 7, wherein the sewing machine has a drive spindle, a first lifter, and a second lifter, the drive spindle having a first eccentric shaft portion and a first two The eccentric shaft portion is connected to the first eccentric shaft portion and the shaft rotation driving member, and the second lifting rod has two ends axially coupled to the second eccentric shaft portion and the second feed tooth Rod.